Index: create.patch.sh
===================================================================
--- create.patch.sh (nonexistent)
+++ create.patch.sh (revision 5)
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+VERSION=8.5p1
+
+tar --files-from=file.list -xzvf ../openssh-$VERSION.tar.gz
+mv openssh-$VERSION openssh-$VERSION-orig
+
+cp -rf ./openssh-$VERSION-new ./openssh-$VERSION
+
+diff --unified -Nr openssh-$VERSION-orig openssh-$VERSION > openssh-$VERSION-tcp_wrappers.patch
+
+mv openssh-$VERSION-tcp_wrappers.patch ../patches
+
+rm -rf ./openssh-$VERSION
+rm -rf ./openssh-$VERSION-orig
Property changes on: create.patch.sh
___________________________________________________________________
Added: svn:executable
## -0,0 +1 ##
+*
\ No newline at end of property
Index: file.list
===================================================================
--- file.list (nonexistent)
+++ file.list (revision 5)
@@ -0,0 +1,3 @@
+openssh-8.5p1/configure.ac
+openssh-8.5p1/sshd.8
+openssh-8.5p1/sshd.c
Index: openssh-8.5p1-new/configure.ac
===================================================================
--- openssh-8.5p1-new/configure.ac (nonexistent)
+++ openssh-8.5p1-new/configure.ac (revision 5)
@@ -0,0 +1,5614 @@
+#
+# Copyright (c) 1999-2004 Damien Miller
+#
+# Permission to use, copy, modify, and distribute this software for any
+# purpose with or without fee is hereby granted, provided that the above
+# copyright notice and this permission notice appear in all copies.
+#
+# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+AC_INIT([OpenSSH], [Portable], [openssh-unix-dev@mindrot.org])
+AC_CONFIG_MACRO_DIR([m4])
+AC_CONFIG_SRCDIR([ssh.c])
+AC_LANG([C])
+
+AC_CONFIG_HEADERS([config.h])
+AC_PROG_CC([cc gcc])
+
+# XXX relax this after reimplementing logit() etc.
+AC_MSG_CHECKING([if $CC supports C99-style variadic macros])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+int f(int a, int b, int c) { return a + b + c; }
+#define F(a, ...) f(a, __VA_ARGS__)
+]], [[return F(1, 2, -3);]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [ AC_MSG_ERROR([*** OpenSSH requires support for C99-style variadic macros]) ]
+)
+
+AC_CANONICAL_HOST
+AC_C_BIGENDIAN
+
+# Checks for programs.
+AC_PROG_AWK
+AC_PROG_CPP
+AC_PROG_RANLIB
+AC_PROG_INSTALL
+AC_PROG_EGREP
+AC_PROG_MKDIR_P
+AC_CHECK_TOOLS([AR], [ar])
+AC_PATH_PROG([CAT], [cat])
+AC_PATH_PROG([KILL], [kill])
+AC_PATH_PROG([SED], [sed])
+AC_PATH_PROG([TEST_MINUS_S_SH], [bash])
+AC_PATH_PROG([TEST_MINUS_S_SH], [ksh])
+AC_PATH_PROG([TEST_MINUS_S_SH], [sh])
+AC_PATH_PROG([SH], [sh])
+AC_PATH_PROG([GROFF], [groff])
+AC_PATH_PROG([NROFF], [nroff awf])
+AC_PATH_PROG([MANDOC], [mandoc])
+AC_SUBST([TEST_SHELL], [sh])
+
+dnl select manpage formatter to be used to build "cat" format pages.
+if test "x$MANDOC" != "x" ; then
+ MANFMT="$MANDOC"
+elif test "x$NROFF" != "x" ; then
+ MANFMT="$NROFF -mandoc"
+elif test "x$GROFF" != "x" ; then
+ MANFMT="$GROFF -mandoc -Tascii"
+else
+ AC_MSG_WARN([no manpage formatter found])
+ MANFMT="false"
+fi
+AC_SUBST([MANFMT])
+
+dnl for buildpkg.sh
+AC_PATH_PROG([PATH_GROUPADD_PROG], [groupadd], [groupadd],
+ [/usr/sbin${PATH_SEPARATOR}/etc])
+AC_PATH_PROG([PATH_USERADD_PROG], [useradd], [useradd],
+ [/usr/sbin${PATH_SEPARATOR}/etc])
+AC_CHECK_PROG([MAKE_PACKAGE_SUPPORTED], [pkgmk], [yes], [no])
+if test -x /sbin/sh; then
+ AC_SUBST([STARTUP_SCRIPT_SHELL], [/sbin/sh])
+else
+ AC_SUBST([STARTUP_SCRIPT_SHELL], [/bin/sh])
+fi
+
+# System features
+AC_SYS_LARGEFILE
+
+if test -z "$AR" ; then
+ AC_MSG_ERROR([*** 'ar' missing, please install or fix your \$PATH ***])
+fi
+
+AC_PATH_PROG([PATH_PASSWD_PROG], [passwd])
+if test ! -z "$PATH_PASSWD_PROG" ; then
+ AC_DEFINE_UNQUOTED([_PATH_PASSWD_PROG], ["$PATH_PASSWD_PROG"],
+ [Full path of your "passwd" program])
+fi
+
+dnl Since autoconf doesn't support it very well, we no longer allow users to
+dnl override LD, however keeping the hook here for now in case there's a use
+dnl use case we overlooked and someone needs to re-enable it. Unless a good
+dnl reason is found we'll be removing this in future.
+LD="$CC"
+AC_SUBST([LD])
+
+AC_C_INLINE
+
+AC_CHECK_DECL([LLONG_MAX], [have_llong_max=1], , [#include <limits.h>])
+AC_CHECK_DECL([LONG_LONG_MAX], [have_long_long_max=1], , [#include <limits.h>])
+AC_CHECK_DECL([SYSTR_POLICY_KILL], [have_systr_policy_kill=1], , [
+ #include <sys/types.h>
+ #include <sys/param.h>
+ #include <dev/systrace.h>
+])
+AC_CHECK_DECL([RLIMIT_NPROC],
+ [AC_DEFINE([HAVE_RLIMIT_NPROC], [], [sys/resource.h has RLIMIT_NPROC])], , [
+ #include <sys/types.h>
+ #include <sys/resource.h>
+])
+AC_CHECK_DECL([PR_SET_NO_NEW_PRIVS], [have_linux_no_new_privs=1], , [
+ #include <sys/types.h>
+ #include <linux/prctl.h>
+])
+
+openssl=yes
+AC_ARG_WITH([openssl],
+ [ --without-openssl Disable use of OpenSSL; use only limited internal crypto **EXPERIMENTAL** ],
+ [ if test "x$withval" = "xno" ; then
+ openssl=no
+ fi
+ ]
+)
+AC_MSG_CHECKING([whether OpenSSL will be used for cryptography])
+if test "x$openssl" = "xyes" ; then
+ AC_MSG_RESULT([yes])
+ AC_DEFINE_UNQUOTED([WITH_OPENSSL], [1], [use libcrypto for cryptography])
+else
+ AC_MSG_RESULT([no])
+fi
+
+use_stack_protector=1
+use_toolchain_hardening=1
+AC_ARG_WITH([stackprotect],
+ [ --without-stackprotect Don't use compiler's stack protection], [
+ if test "x$withval" = "xno"; then
+ use_stack_protector=0
+ fi ])
+AC_ARG_WITH([hardening],
+ [ --without-hardening Don't use toolchain hardening flags], [
+ if test "x$withval" = "xno"; then
+ use_toolchain_hardening=0
+ fi ])
+
+# We use -Werror for the tests only so that we catch warnings like "this is
+# on by default" for things like -fPIE.
+AC_MSG_CHECKING([if $CC supports -Werror])
+saved_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -Werror"
+AC_COMPILE_IFELSE([AC_LANG_SOURCE([[int main(void) { return 0; }]])],
+ [ AC_MSG_RESULT([yes])
+ WERROR="-Werror"],
+ [ AC_MSG_RESULT([no])
+ WERROR="" ]
+)
+CFLAGS="$saved_CFLAGS"
+
+if test "$GCC" = "yes" || test "$GCC" = "egcs"; then
+ OSSH_CHECK_CFLAG_COMPILE([-pipe])
+ OSSH_CHECK_CFLAG_COMPILE([-Wunknown-warning-option])
+ OSSH_CHECK_CFLAG_COMPILE([-Wno-error=format-truncation])
+ OSSH_CHECK_CFLAG_COMPILE([-Qunused-arguments])
+ OSSH_CHECK_CFLAG_COMPILE([-Wall])
+ OSSH_CHECK_CFLAG_COMPILE([-Wextra])
+ OSSH_CHECK_CFLAG_COMPILE([-Wpointer-arith])
+ OSSH_CHECK_CFLAG_COMPILE([-Wuninitialized])
+ OSSH_CHECK_CFLAG_COMPILE([-Wsign-compare])
+ OSSH_CHECK_CFLAG_COMPILE([-Wformat-security])
+ OSSH_CHECK_CFLAG_COMPILE([-Wsizeof-pointer-memaccess])
+ OSSH_CHECK_CFLAG_COMPILE([-Wpointer-sign], [-Wno-pointer-sign])
+ OSSH_CHECK_CFLAG_COMPILE([-Wunused-parameter], [-Wno-unused-parameter])
+ OSSH_CHECK_CFLAG_COMPILE([-Wunused-result], [-Wno-unused-result])
+ OSSH_CHECK_CFLAG_COMPILE([-Wimplicit-fallthrough])
+ OSSH_CHECK_CFLAG_COMPILE([-fno-strict-aliasing])
+ if test "x$use_toolchain_hardening" = "x1"; then
+ OSSH_CHECK_CFLAG_COMPILE([-mretpoline]) # clang
+ OSSH_CHECK_LDFLAG_LINK([-Wl,-z,retpolineplt])
+ OSSH_CHECK_CFLAG_COMPILE([-D_FORTIFY_SOURCE=2])
+ OSSH_CHECK_LDFLAG_LINK([-Wl,-z,relro])
+ OSSH_CHECK_LDFLAG_LINK([-Wl,-z,now])
+ OSSH_CHECK_LDFLAG_LINK([-Wl,-z,noexecstack])
+ # NB. -ftrapv expects certain support functions to be present in
+ # the compiler library (libgcc or similar) to detect integer operations
+ # that can overflow. We must check that the result of enabling it
+ # actually links. The test program compiled/linked includes a number
+ # of integer operations that should exercise this.
+ OSSH_CHECK_CFLAG_LINK([-ftrapv])
+ fi
+ AC_MSG_CHECKING([gcc version])
+ GCC_VER=`$CC -v 2>&1 | $AWK '/gcc version /{print $3}'`
+ case $GCC_VER in
+ 1.*) no_attrib_nonnull=1 ;;
+ 2.8* | 2.9*)
+ no_attrib_nonnull=1
+ ;;
+ 2.*) no_attrib_nonnull=1 ;;
+ *) ;;
+ esac
+ AC_MSG_RESULT([$GCC_VER])
+
+ AC_MSG_CHECKING([if $CC accepts -fno-builtin-memset])
+ saved_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -fno-builtin-memset"
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <string.h> ]],
+ [[ char b[10]; memset(b, 0, sizeof(b)); ]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [ AC_MSG_RESULT([no])
+ CFLAGS="$saved_CFLAGS" ]
+ )
+
+ # -fstack-protector-all doesn't always work for some GCC versions
+ # and/or platforms, so we test if we can. If it's not supported
+ # on a given platform gcc will emit a warning so we use -Werror.
+ if test "x$use_stack_protector" = "x1"; then
+ for t in -fstack-protector-strong -fstack-protector-all \
+ -fstack-protector; do
+ AC_MSG_CHECKING([if $CC supports $t])
+ saved_CFLAGS="$CFLAGS"
+ saved_LDFLAGS="$LDFLAGS"
+ CFLAGS="$CFLAGS $t -Werror"
+ LDFLAGS="$LDFLAGS $t -Werror"
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <stdio.h>
+ int func (int t) {char b[100]; snprintf(b,sizeof b,"%d",t); return t;}
+ ]],
+ [[
+ char x[256];
+ snprintf(x, sizeof(x), "XXX%d", func(1));
+ ]])],
+ [ AC_MSG_RESULT([yes])
+ CFLAGS="$saved_CFLAGS $t"
+ LDFLAGS="$saved_LDFLAGS $t"
+ AC_MSG_CHECKING([if $t works])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <stdio.h>
+ int func (int t) {char b[100]; snprintf(b,sizeof b,"%d",t); return t;}
+ ]],
+ [[
+ char x[256];
+ snprintf(x, sizeof(x), "XXX%d", func(1));
+ ]])],
+ [ AC_MSG_RESULT([yes])
+ break ],
+ [ AC_MSG_RESULT([no]) ],
+ [ AC_MSG_WARN([cross compiling: cannot test])
+ break ]
+ )
+ ],
+ [ AC_MSG_RESULT([no]) ]
+ )
+ CFLAGS="$saved_CFLAGS"
+ LDFLAGS="$saved_LDFLAGS"
+ done
+ fi
+
+ if test -z "$have_llong_max"; then
+ # retry LLONG_MAX with -std=gnu99, needed on some Linuxes
+ unset ac_cv_have_decl_LLONG_MAX
+ saved_CFLAGS="$CFLAGS"
+ CFLAGS="$CFLAGS -std=gnu99"
+ AC_CHECK_DECL([LLONG_MAX],
+ [have_llong_max=1],
+ [CFLAGS="$saved_CFLAGS"],
+ [#include <limits.h>]
+ )
+ fi
+fi
+
+AC_MSG_CHECKING([if compiler allows __attribute__ on return types])
+AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <stdlib.h>
+__attribute__((__unused__)) static void foo(void){return;}]],
+ [[ exit(0); ]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [ AC_MSG_RESULT([no])
+ AC_DEFINE(NO_ATTRIBUTE_ON_RETURN_TYPE, 1,
+ [compiler does not accept __attribute__ on return types]) ]
+)
+
+AC_MSG_CHECKING([if compiler allows __attribute__ prototype args])
+AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <stdlib.h>
+typedef void foo(const char *, ...) __attribute__((format(printf, 1, 2)));]],
+ [[ exit(0); ]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [ AC_MSG_RESULT([no])
+ AC_DEFINE(NO_ATTRIBUTE_ON_PROTOTYPE_ARGS, 1,
+ [compiler does not accept __attribute__ on prototype args]) ]
+)
+
+AC_MSG_CHECKING([if compiler supports variable length arrays])
+AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[#include <stdlib.h>]],
+ [[ int i; for (i=0; i<3; i++){int a[i]; a[i-1]=0;} exit(0); ]])],
+ [ AC_MSG_RESULT([yes])
+ AC_DEFINE(VARIABLE_LENGTH_ARRAYS, [1],
+ [compiler supports variable length arrays]) ],
+ [ AC_MSG_RESULT([no]) ]
+)
+
+if test "x$no_attrib_nonnull" != "x1" ; then
+ AC_DEFINE([HAVE_ATTRIBUTE__NONNULL__], [1], [Have attribute nonnull])
+fi
+
+AC_ARG_WITH([rpath],
+ [ --without-rpath Disable auto-added -R linker paths],
+ [
+ if test "x$withval" = "xno" ; then
+ rpath_opt=""
+ elif test "x$withval" = "xyes" ; then
+ rpath_opt="-R"
+ else
+ rpath_opt="$withval"
+ fi
+ ]
+)
+
+# Allow user to specify flags
+AC_ARG_WITH([cflags],
+ [ --with-cflags Specify additional flags to pass to compiler],
+ [
+ if test -n "$withval" && test "x$withval" != "xno" && \
+ test "x${withval}" != "xyes"; then
+ CFLAGS="$CFLAGS $withval"
+ fi
+ ]
+)
+
+AC_ARG_WITH([cflags-after],
+ [ --with-cflags-after Specify additional flags to pass to compiler after configure],
+ [
+ if test -n "$withval" && test "x$withval" != "xno" && \
+ test "x${withval}" != "xyes"; then
+ CFLAGS_AFTER="$withval"
+ fi
+ ]
+)
+AC_ARG_WITH([cppflags],
+ [ --with-cppflags Specify additional flags to pass to preprocessor] ,
+ [
+ if test -n "$withval" && test "x$withval" != "xno" && \
+ test "x${withval}" != "xyes"; then
+ CPPFLAGS="$CPPFLAGS $withval"
+ fi
+ ]
+)
+AC_ARG_WITH([ldflags],
+ [ --with-ldflags Specify additional flags to pass to linker],
+ [
+ if test -n "$withval" && test "x$withval" != "xno" && \
+ test "x${withval}" != "xyes"; then
+ LDFLAGS="$LDFLAGS $withval"
+ fi
+ ]
+)
+AC_ARG_WITH([ldflags-after],
+ [ --with-ldflags-after Specify additional flags to pass to linker after configure],
+ [
+ if test -n "$withval" && test "x$withval" != "xno" && \
+ test "x${withval}" != "xyes"; then
+ LDFLAGS_AFTER="$withval"
+ fi
+ ]
+)
+AC_ARG_WITH([libs],
+ [ --with-libs Specify additional libraries to link with],
+ [
+ if test -n "$withval" && test "x$withval" != "xno" && \
+ test "x${withval}" != "xyes"; then
+ LIBS="$LIBS $withval"
+ fi
+ ]
+)
+AC_ARG_WITH([Werror],
+ [ --with-Werror Build main code with -Werror],
+ [
+ if test -n "$withval" && test "x$withval" != "xno"; then
+ werror_flags="-Werror"
+ if test "x${withval}" != "xyes"; then
+ werror_flags="$withval"
+ fi
+ fi
+ ]
+)
+
+AC_CHECK_HEADERS([ \
+ blf.h \
+ bstring.h \
+ crypt.h \
+ crypto/sha2.h \
+ dirent.h \
+ endian.h \
+ elf.h \
+ err.h \
+ features.h \
+ fcntl.h \
+ floatingpoint.h \
+ fnmatch.h \
+ getopt.h \
+ glob.h \
+ ia.h \
+ iaf.h \
+ ifaddrs.h \
+ inttypes.h \
+ langinfo.h \
+ limits.h \
+ locale.h \
+ login.h \
+ maillock.h \
+ ndir.h \
+ net/if_tun.h \
+ netdb.h \
+ netgroup.h \
+ pam/pam_appl.h \
+ paths.h \
+ poll.h \
+ pty.h \
+ readpassphrase.h \
+ rpc/types.h \
+ security/pam_appl.h \
+ sha2.h \
+ shadow.h \
+ stddef.h \
+ stdint.h \
+ string.h \
+ strings.h \
+ sys/bitypes.h \
+ sys/byteorder.h \
+ sys/bsdtty.h \
+ sys/cdefs.h \
+ sys/dir.h \
+ sys/file.h \
+ sys/mman.h \
+ sys/label.h \
+ sys/ndir.h \
+ sys/poll.h \
+ sys/prctl.h \
+ sys/pstat.h \
+ sys/ptrace.h \
+ sys/random.h \
+ sys/select.h \
+ sys/stat.h \
+ sys/stream.h \
+ sys/stropts.h \
+ sys/strtio.h \
+ sys/statvfs.h \
+ sys/sysmacros.h \
+ sys/time.h \
+ sys/timers.h \
+ sys/vfs.h \
+ time.h \
+ tmpdir.h \
+ ttyent.h \
+ ucred.h \
+ unistd.h \
+ usersec.h \
+ util.h \
+ utime.h \
+ utmp.h \
+ utmpx.h \
+ vis.h \
+ wchar.h \
+])
+
+# On some platforms (eg SunOS4) sys/audit.h requires sys/[time|types|label.h]
+# to be included first.
+AC_CHECK_HEADERS([sys/audit.h], [], [], [
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#ifdef HAVE_SYS_LABEL_H
+# include <sys/label.h>
+#endif
+])
+
+# sys/capsicum.h requires sys/types.h
+AC_CHECK_HEADERS([sys/capsicum.h], [], [], [
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+])
+
+# net/route.h requires sys/socket.h and sys/types.h.
+# sys/sysctl.h also requires sys/param.h
+AC_CHECK_HEADERS([net/route.h sys/sysctl.h], [], [], [
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#include <sys/param.h>
+#include <sys/socket.h>
+])
+
+# lastlog.h requires sys/time.h to be included first on Solaris
+AC_CHECK_HEADERS([lastlog.h], [], [], [
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+])
+
+# sys/ptms.h requires sys/stream.h to be included first on Solaris
+AC_CHECK_HEADERS([sys/ptms.h], [], [], [
+#ifdef HAVE_SYS_STREAM_H
+# include <sys/stream.h>
+#endif
+])
+
+# login_cap.h requires sys/types.h on NetBSD
+AC_CHECK_HEADERS([login_cap.h], [], [], [
+#include <sys/types.h>
+])
+
+# older BSDs need sys/param.h before sys/mount.h
+AC_CHECK_HEADERS([sys/mount.h], [], [], [
+#include <sys/param.h>
+])
+
+# Android requires sys/socket.h to be included before sys/un.h
+AC_CHECK_HEADERS([sys/un.h], [], [], [
+#include <sys/types.h>
+#include <sys/socket.h>
+])
+
+# Messages for features tested for in target-specific section
+SIA_MSG="no"
+SPC_MSG="no"
+SP_MSG="no"
+SPP_MSG="no"
+
+# Support for Solaris/Illumos privileges (this test is used by both
+# the --with-solaris-privs option and --with-sandbox=solaris).
+SOLARIS_PRIVS="no"
+
+# Check for some target-specific stuff
+case "$host" in
+*-*-aix*)
+ # Some versions of VAC won't allow macro redefinitions at
+ # -qlanglevel=ansi, and autoconf 2.60 sometimes insists on using that
+ # particularly with older versions of vac or xlc.
+ # It also throws errors about null macro arguments, but these are
+ # not fatal.
+ AC_MSG_CHECKING([if compiler allows macro redefinitions])
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[
+#define testmacro foo
+#define testmacro bar]],
+ [[ exit(0); ]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [ AC_MSG_RESULT([no])
+ CC="`echo $CC | sed 's/-qlanglvl\=ansi//g'`"
+ CFLAGS="`echo $CFLAGS | sed 's/-qlanglvl\=ansi//g'`"
+ CPPFLAGS="`echo $CPPFLAGS | sed 's/-qlanglvl\=ansi//g'`"
+ ]
+ )
+
+ AC_MSG_CHECKING([how to specify blibpath for linker ($LD)])
+ if (test -z "$blibpath"); then
+ blibpath="/usr/lib:/lib"
+ fi
+ saved_LDFLAGS="$LDFLAGS"
+ if test "$GCC" = "yes"; then
+ flags="-Wl,-blibpath: -Wl,-rpath, -blibpath:"
+ else
+ flags="-blibpath: -Wl,-blibpath: -Wl,-rpath,"
+ fi
+ for tryflags in $flags ;do
+ if (test -z "$blibflags"); then
+ LDFLAGS="$saved_LDFLAGS $tryflags$blibpath"
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[]], [[]])],
+ [blibflags=$tryflags], [])
+ fi
+ done
+ if (test -z "$blibflags"); then
+ AC_MSG_RESULT([not found])
+ AC_MSG_ERROR([*** must be able to specify blibpath on AIX - check config.log])
+ else
+ AC_MSG_RESULT([$blibflags])
+ fi
+ LDFLAGS="$saved_LDFLAGS"
+ dnl Check for authenticate. Might be in libs.a on older AIXes
+ AC_CHECK_FUNC([authenticate], [AC_DEFINE([WITH_AIXAUTHENTICATE], [1],
+ [Define if you want to enable AIX4's authenticate function])],
+ [AC_CHECK_LIB([s], [authenticate],
+ [ AC_DEFINE([WITH_AIXAUTHENTICATE])
+ LIBS="$LIBS -ls"
+ ])
+ ])
+ dnl Check for various auth function declarations in headers.
+ AC_CHECK_DECLS([authenticate, loginrestrictions, loginsuccess,
+ passwdexpired, setauthdb], , , [#include <usersec.h>])
+ dnl Check if loginfailed is declared and takes 4 arguments (AIX >= 5.2)
+ AC_CHECK_DECLS([loginfailed],
+ [AC_MSG_CHECKING([if loginfailed takes 4 arguments])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <usersec.h> ]],
+ [[ (void)loginfailed("user","host","tty",0); ]])],
+ [AC_MSG_RESULT([yes])
+ AC_DEFINE([AIX_LOGINFAILED_4ARG], [1],
+ [Define if your AIX loginfailed() function
+ takes 4 arguments (AIX >= 5.2)])], [AC_MSG_RESULT([no])
+ ])],
+ [],
+ [#include <usersec.h>]
+ )
+ AC_CHECK_FUNCS([getgrset setauthdb])
+ AC_CHECK_DECL([F_CLOSEM],
+ AC_DEFINE([HAVE_FCNTL_CLOSEM], [1], [Use F_CLOSEM fcntl for closefrom]),
+ [],
+ [ #include <limits.h>
+ #include <fcntl.h> ]
+ )
+ check_for_aix_broken_getaddrinfo=1
+ AC_DEFINE([SETEUID_BREAKS_SETUID], [1],
+ [Define if your platform breaks doing a seteuid before a setuid])
+ AC_DEFINE([BROKEN_SETREUID], [1], [Define if your setreuid() is broken])
+ AC_DEFINE([BROKEN_SETREGID], [1], [Define if your setregid() is broken])
+ dnl AIX handles lastlog as part of its login message
+ AC_DEFINE([DISABLE_LASTLOG], [1], [Define if you don't want to use lastlog])
+ AC_DEFINE([LOGIN_NEEDS_UTMPX], [1],
+ [Some systems need a utmpx entry for /bin/login to work])
+ AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV],
+ [Define to a Set Process Title type if your system is
+ supported by bsd-setproctitle.c])
+ AC_DEFINE([SSHPAM_CHAUTHTOK_NEEDS_RUID], [1],
+ [AIX 5.2 and 5.3 (and presumably newer) require this])
+ AC_DEFINE([PTY_ZEROREAD], [1], [read(1) can return 0 for a non-closed fd])
+ AC_DEFINE([PLATFORM_SYS_DIR_UID], 2, [System dirs owned by bin (uid 2)])
+ AC_DEFINE([BROKEN_STRNDUP], 1, [strndup broken, see APAR IY61211])
+ AC_DEFINE([BROKEN_STRNLEN], 1, [strnlen broken, see APAR IY62551])
+ ;;
+*-*-android*)
+ AC_DEFINE([DISABLE_UTMP], [1], [Define if you don't want to use utmp])
+ AC_DEFINE([DISABLE_WTMP], [1], [Define if you don't want to use wtmp])
+ ;;
+*-*-cygwin*)
+ check_for_libcrypt_later=1
+ LIBS="$LIBS /usr/lib/textreadmode.o"
+ AC_DEFINE([HAVE_CYGWIN], [1], [Define if you are on Cygwin])
+ AC_DEFINE([USE_PIPES], [1], [Use PIPES instead of a socketpair()])
+ AC_DEFINE([NO_UID_RESTORATION_TEST], [1],
+ [Define to disable UID restoration test])
+ AC_DEFINE([DISABLE_SHADOW], [1],
+ [Define if you want to disable shadow passwords])
+ AC_DEFINE([NO_X11_UNIX_SOCKETS], [1],
+ [Define if X11 doesn't support AF_UNIX sockets on that system])
+ AC_DEFINE([DISABLE_FD_PASSING], [1],
+ [Define if your platform needs to skip post auth
+ file descriptor passing])
+ AC_DEFINE([SSH_IOBUFSZ], [65535], [Windows is sensitive to read buffer size])
+ AC_DEFINE([FILESYSTEM_NO_BACKSLASH], [1], [File names may not contain backslash characters])
+ # Cygwin defines optargs, optargs as declspec(dllimport) for historical
+ # reasons which cause compile warnings, so we disable those warnings.
+ OSSH_CHECK_CFLAG_COMPILE([-Wno-attributes])
+ ;;
+*-*-dgux*)
+ AC_DEFINE([IP_TOS_IS_BROKEN], [1],
+ [Define if your system choked on IP TOS setting])
+ AC_DEFINE([SETEUID_BREAKS_SETUID])
+ AC_DEFINE([BROKEN_SETREUID])
+ AC_DEFINE([BROKEN_SETREGID])
+ ;;
+*-*-darwin*)
+ use_pie=auto
+ AC_MSG_CHECKING([if we have working getaddrinfo])
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#include <mach-o/dyld.h>
+#include <stdlib.h>
+main() { if (NSVersionOfRunTimeLibrary("System") >= (60 << 16))
+ exit(0);
+ else
+ exit(1);
+}
+ ]])],
+ [AC_MSG_RESULT([working])],
+ [AC_MSG_RESULT([buggy])
+ AC_DEFINE([BROKEN_GETADDRINFO], [1],
+ [getaddrinfo is broken (if present)])
+ ],
+ [AC_MSG_RESULT([assume it is working])])
+ AC_DEFINE([SETEUID_BREAKS_SETUID])
+ AC_DEFINE([BROKEN_SETREUID])
+ AC_DEFINE([BROKEN_SETREGID])
+ AC_DEFINE([BROKEN_GLOB], [1], [OS X glob does not do what we expect])
+ AC_DEFINE_UNQUOTED([BIND_8_COMPAT], [1],
+ [Define if your resolver libs need this for getrrsetbyname])
+ AC_DEFINE([SSH_TUN_FREEBSD], [1], [Open tunnel devices the FreeBSD way])
+ AC_DEFINE([SSH_TUN_COMPAT_AF], [1],
+ [Use tunnel device compatibility to OpenBSD])
+ AC_DEFINE([SSH_TUN_PREPEND_AF], [1],
+ [Prepend the address family to IP tunnel traffic])
+ m4_pattern_allow([AU_IPv])
+ AC_CHECK_DECL([AU_IPv4], [],
+ AC_DEFINE([AU_IPv4], [0], [System only supports IPv4 audit records])
+ [#include <bsm/audit.h>]
+ AC_DEFINE([LASTLOG_WRITE_PUTUTXLINE], [1],
+ [Define if pututxline updates lastlog too])
+ )
+ AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV],
+ [Define to a Set Process Title type if your system is
+ supported by bsd-setproctitle.c])
+ AC_CHECK_FUNCS([sandbox_init])
+ AC_CHECK_HEADERS([sandbox.h])
+ AC_CHECK_LIB([sandbox], [sandbox_apply], [
+ SSHDLIBS="$SSHDLIBS -lsandbox"
+ ])
+ # proc_pidinfo()-based closefrom() replacement.
+ AC_CHECK_HEADERS([libproc.h])
+ AC_CHECK_FUNCS([proc_pidinfo])
+ ;;
+*-*-dragonfly*)
+ SSHDLIBS="$SSHDLIBS -lcrypt"
+ TEST_MALLOC_OPTIONS="AFGJPRX"
+ ;;
+*-*-haiku*)
+ LIBS="$LIBS -lbsd "
+ CFLAGS="$CFLAGS -D_BSD_SOURCE"
+ AC_CHECK_LIB([network], [socket])
+ AC_DEFINE([HAVE_U_INT64_T])
+ AC_DEFINE([DISABLE_UTMPX], [1], [no utmpx])
+ MANTYPE=man
+ ;;
+*-*-hpux*)
+ # first we define all of the options common to all HP-UX releases
+ CPPFLAGS="$CPPFLAGS -D_HPUX_SOURCE -D_XOPEN_SOURCE -D_XOPEN_SOURCE_EXTENDED=1"
+ IPADDR_IN_DISPLAY=yes
+ AC_DEFINE([USE_PIPES])
+ AC_DEFINE([LOGIN_NEEDS_UTMPX])
+ AC_DEFINE([LOCKED_PASSWD_STRING], ["*"],
+ [String used in /etc/passwd to denote locked account])
+ AC_DEFINE([SPT_TYPE], [SPT_PSTAT])
+ AC_DEFINE([PLATFORM_SYS_DIR_UID], 2, [System dirs owned by bin (uid 2)])
+ maildir="/var/mail"
+ LIBS="$LIBS -lsec"
+ AC_CHECK_LIB([xnet], [t_error], ,
+ [AC_MSG_ERROR([*** -lxnet needed on HP-UX - check config.log ***])])
+
+ # next, we define all of the options specific to major releases
+ case "$host" in
+ *-*-hpux10*)
+ if test -z "$GCC"; then
+ CFLAGS="$CFLAGS -Ae"
+ fi
+ ;;
+ *-*-hpux11*)
+ AC_DEFINE([PAM_SUN_CODEBASE], [1],
+ [Define if you are using Solaris-derived PAM which
+ passes pam_messages to the conversation function
+ with an extra level of indirection])
+ AC_DEFINE([DISABLE_UTMP], [1],
+ [Define if you don't want to use utmp])
+ AC_DEFINE([USE_BTMP], [1], [Use btmp to log bad logins])
+ check_for_hpux_broken_getaddrinfo=1
+ check_for_conflicting_getspnam=1
+ ;;
+ esac
+
+ # lastly, we define options specific to minor releases
+ case "$host" in
+ *-*-hpux10.26)
+ AC_DEFINE([HAVE_SECUREWARE], [1],
+ [Define if you have SecureWare-based
+ protected password database])
+ disable_ptmx_check=yes
+ LIBS="$LIBS -lsecpw"
+ ;;
+ esac
+ ;;
+*-*-irix5*)
+ PATH="$PATH:/usr/etc"
+ AC_DEFINE([BROKEN_INET_NTOA], [1],
+ [Define if you system's inet_ntoa is busted
+ (e.g. Irix gcc issue)])
+ AC_DEFINE([SETEUID_BREAKS_SETUID])
+ AC_DEFINE([BROKEN_SETREUID])
+ AC_DEFINE([BROKEN_SETREGID])
+ AC_DEFINE([WITH_ABBREV_NO_TTY], [1],
+ [Define if you shouldn't strip 'tty' from your
+ ttyname in [uw]tmp])
+ AC_DEFINE([LOCKED_PASSWD_STRING], ["*LK*"])
+ ;;
+*-*-irix6*)
+ PATH="$PATH:/usr/etc"
+ AC_DEFINE([WITH_IRIX_ARRAY], [1],
+ [Define if you have/want arrays
+ (cluster-wide session management, not C arrays)])
+ AC_DEFINE([WITH_IRIX_PROJECT], [1],
+ [Define if you want IRIX project management])
+ AC_DEFINE([WITH_IRIX_AUDIT], [1],
+ [Define if you want IRIX audit trails])
+ AC_CHECK_FUNC([jlimit_startjob], [AC_DEFINE([WITH_IRIX_JOBS], [1],
+ [Define if you want IRIX kernel jobs])])
+ AC_DEFINE([BROKEN_INET_NTOA])
+ AC_DEFINE([SETEUID_BREAKS_SETUID])
+ AC_DEFINE([BROKEN_SETREUID])
+ AC_DEFINE([BROKEN_SETREGID])
+ AC_DEFINE([BROKEN_UPDWTMPX], [1], [updwtmpx is broken (if present)])
+ AC_DEFINE([WITH_ABBREV_NO_TTY])
+ AC_DEFINE([LOCKED_PASSWD_STRING], ["*LK*"])
+ ;;
+*-*-k*bsd*-gnu | *-*-kopensolaris*-gnu)
+ check_for_libcrypt_later=1
+ AC_DEFINE([PAM_TTY_KLUDGE])
+ AC_DEFINE([LOCKED_PASSWD_PREFIX], ["!"])
+ AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV])
+ AC_DEFINE([_PATH_BTMP], ["/var/log/btmp"], [log for bad login attempts])
+ AC_DEFINE([USE_BTMP], [1], [Use btmp to log bad logins])
+ ;;
+*-*-linux*)
+ no_dev_ptmx=1
+ use_pie=auto
+ check_for_libcrypt_later=1
+ check_for_openpty_ctty_bug=1
+ dnl Target SUSv3/POSIX.1-2001 plus BSD specifics.
+ dnl _DEFAULT_SOURCE is the new name for _BSD_SOURCE
+ CPPFLAGS="$CPPFLAGS -D_XOPEN_SOURCE=600 -D_BSD_SOURCE -D_DEFAULT_SOURCE"
+ AC_DEFINE([PAM_TTY_KLUDGE], [1],
+ [Work around problematic Linux PAM modules handling of PAM_TTY])
+ AC_DEFINE([LOCKED_PASSWD_PREFIX], ["!"],
+ [String used in /etc/passwd to denote locked account])
+ AC_DEFINE([SPT_TYPE], [SPT_REUSEARGV])
+ AC_DEFINE([LINK_OPNOTSUPP_ERRNO], [EPERM],
+ [Define to whatever link() returns for "not supported"
+ if it doesn't return EOPNOTSUPP.])
+ AC_DEFINE([_PATH_BTMP], ["/var/log/btmp"], [log for bad login attempts])
+ AC_DEFINE([USE_BTMP])
+ AC_DEFINE([LINUX_OOM_ADJUST], [1], [Adjust Linux out-of-memory killer])
+ inet6_default_4in6=yes
+ case `uname -r` in
+ 1.*|2.0.*)
+ AC_DEFINE([BROKEN_CMSG_TYPE], [1],
+ [Define if cmsg_type is not passed correctly])
+ ;;
+ esac
+ # tun(4) forwarding compat code
+ AC_CHECK_HEADERS([linux/if_tun.h])
+ if test "x$ac_cv_header_linux_if_tun_h" = "xyes" ; then
+ AC_DEFINE([SSH_TUN_LINUX], [1],
+ [Open tunnel devices the Linux tun/tap way])
+ AC_DEFINE([SSH_TUN_COMPAT_AF], [1],
+ [Use tunnel device compatibility to OpenBSD])
+ AC_DEFINE([SSH_TUN_PREPEND_AF], [1],
+ [Prepend the address family to IP tunnel traffic])
+ fi
+ AC_CHECK_HEADER([linux/if.h],
+ AC_DEFINE([SYS_RDOMAIN_LINUX], [1],
+ [Support routing domains using Linux VRF]), [], [
+#ifdef HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+ ])
+ AC_CHECK_HEADERS([linux/seccomp.h linux/filter.h linux/audit.h], [],
+ [], [#include <linux/types.h>])
+ # Obtain MIPS ABI
+ case "$host" in
+ mips*)
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#if _MIPS_SIM != _ABIO32
+#error
+#endif
+ ]])],[mips_abi="o32"],[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#if _MIPS_SIM != _ABIN32
+#error
+#endif
+ ]])],[mips_abi="n32"],[AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#if _MIPS_SIM != _ABI64
+#error
+#endif
+ ]])],[mips_abi="n64"],[AC_MSG_ERROR([unknown MIPS ABI])
+ ])
+ ])
+ ])
+ ;;
+ esac
+ AC_MSG_CHECKING([for seccomp architecture])
+ seccomp_audit_arch=
+ case "$host" in
+ x86_64-*)
+ seccomp_audit_arch=AUDIT_ARCH_X86_64
+ ;;
+ i*86-*)
+ seccomp_audit_arch=AUDIT_ARCH_I386
+ ;;
+ arm*-*)
+ seccomp_audit_arch=AUDIT_ARCH_ARM
+ ;;
+ aarch64*-*)
+ seccomp_audit_arch=AUDIT_ARCH_AARCH64
+ ;;
+ s390x-*)
+ seccomp_audit_arch=AUDIT_ARCH_S390X
+ ;;
+ s390-*)
+ seccomp_audit_arch=AUDIT_ARCH_S390
+ ;;
+ powerpc64-*)
+ seccomp_audit_arch=AUDIT_ARCH_PPC64
+ ;;
+ powerpc64le-*)
+ seccomp_audit_arch=AUDIT_ARCH_PPC64LE
+ ;;
+ mips-*)
+ seccomp_audit_arch=AUDIT_ARCH_MIPS
+ ;;
+ mipsel-*)
+ seccomp_audit_arch=AUDIT_ARCH_MIPSEL
+ ;;
+ mips64-*)
+ case "$mips_abi" in
+ "n32")
+ seccomp_audit_arch=AUDIT_ARCH_MIPS64N32
+ ;;
+ "n64")
+ seccomp_audit_arch=AUDIT_ARCH_MIPS64
+ ;;
+ esac
+ ;;
+ mips64el-*)
+ case "$mips_abi" in
+ "n32")
+ seccomp_audit_arch=AUDIT_ARCH_MIPSEL64N32
+ ;;
+ "n64")
+ seccomp_audit_arch=AUDIT_ARCH_MIPSEL64
+ ;;
+ esac
+ ;;
+ riscv64-*)
+ seccomp_audit_arch=AUDIT_ARCH_RISCV64
+ ;;
+ esac
+ if test "x$seccomp_audit_arch" != "x" ; then
+ AC_MSG_RESULT(["$seccomp_audit_arch"])
+ AC_DEFINE_UNQUOTED([SECCOMP_AUDIT_ARCH], [$seccomp_audit_arch],
+ [Specify the system call convention in use])
+ else
+ AC_MSG_RESULT([architecture not supported])
+ fi
+ ;;
+mips-sony-bsd|mips-sony-newsos4)
+ AC_DEFINE([NEED_SETPGRP], [1], [Need setpgrp to acquire controlling tty])
+ SONY=1
+ ;;
+*-*-netbsd*)
+ check_for_libcrypt_before=1
+ if test "x$withval" != "xno" ; then
+ rpath_opt="-R"
+ fi
+ CPPFLAGS="$CPPFLAGS -D_OPENBSD_SOURCE"
+ AC_DEFINE([SSH_TUN_FREEBSD], [1], [Open tunnel devices the FreeBSD way])
+ AC_CHECK_HEADER([net/if_tap.h], ,
+ AC_DEFINE([SSH_TUN_NO_L2], [1], [No layer 2 tunnel support]))
+ AC_DEFINE([SSH_TUN_PREPEND_AF], [1],
+ [Prepend the address family to IP tunnel traffic])
+ TEST_MALLOC_OPTIONS="AJRX"
+ AC_DEFINE([BROKEN_READ_COMPARISON], [1],
+ [NetBSD read function is sometimes redirected, breaking atomicio comparisons against it])
+ ;;
+*-*-freebsd*)
+ check_for_libcrypt_later=1
+ AC_DEFINE([LOCKED_PASSWD_PREFIX], ["*LOCKED*"], [Account locked with pw(1)])
+ AC_DEFINE([SSH_TUN_FREEBSD], [1], [Open tunnel devices the FreeBSD way])
+ AC_CHECK_HEADER([net/if_tap.h], ,
+ AC_DEFINE([SSH_TUN_NO_L2], [1], [No layer 2 tunnel support]))
+ AC_DEFINE([BROKEN_GLOB], [1], [FreeBSD glob does not do what we need])
+ TEST_MALLOC_OPTIONS="AJRX"
+ # Preauth crypto occasionally uses file descriptors for crypto offload
+ # and will crash if they cannot be opened.
+ AC_DEFINE([SANDBOX_SKIP_RLIMIT_NOFILE], [1],
+ [define if setrlimit RLIMIT_NOFILE breaks things])
+ ;;
+*-*-bsdi*)
+ AC_DEFINE([SETEUID_BREAKS_SETUID])
+ AC_DEFINE([BROKEN_SETREUID])
+ AC_DEFINE([BROKEN_SETREGID])
+ ;;
+*-next-*)
+ conf_lastlog_location="/usr/adm/lastlog"
+ conf_utmp_location=/etc/utmp
+ conf_wtmp_location=/usr/adm/wtmp
+ maildir=/usr/spool/mail
+ AC_DEFINE([HAVE_NEXT], [1], [Define if you are on NeXT])
+ AC_DEFINE([USE_PIPES])
+ AC_DEFINE([BROKEN_SAVED_UIDS], [1], [Needed for NeXT])
+ ;;
+*-*-openbsd*)
+ use_pie=auto
+ AC_DEFINE([HAVE_ATTRIBUTE__SENTINEL__], [1], [OpenBSD's gcc has sentinel])
+ AC_DEFINE([HAVE_ATTRIBUTE__BOUNDED__], [1], [OpenBSD's gcc has bounded])
+ AC_DEFINE([SSH_TUN_OPENBSD], [1], [Open tunnel devices the OpenBSD way])
+ AC_DEFINE([SYSLOG_R_SAFE_IN_SIGHAND], [1],
+ [syslog_r function is safe to use in in a signal handler])
+ TEST_MALLOC_OPTIONS="AFGJPRX"
+ ;;
+*-*-solaris*)
+ if test "x$withval" != "xno" ; then
+ rpath_opt="-R"
+ fi
+ AC_DEFINE([PAM_SUN_CODEBASE])
+ AC_DEFINE([LOGIN_NEEDS_UTMPX])
+ AC_DEFINE([PAM_TTY_KLUDGE])
+ AC_DEFINE([SSHPAM_CHAUTHTOK_NEEDS_RUID], [1],
+ [Define if pam_chauthtok wants real uid set
+ to the unpriv'ed user])
+ AC_DEFINE([LOCKED_PASSWD_STRING], ["*LK*"])
+ # Pushing STREAMS modules will cause sshd to acquire a controlling tty.
+ AC_DEFINE([SSHD_ACQUIRES_CTTY], [1],
+ [Define if sshd somehow reacquires a controlling TTY
+ after setsid()])
+ AC_DEFINE([PASSWD_NEEDS_USERNAME], [1], [must supply username to passwd
+ in case the name is longer than 8 chars])
+ AC_DEFINE([BROKEN_TCGETATTR_ICANON], [1], [tcgetattr with ICANON may hang])
+ external_path_file=/etc/default/login
+ # hardwire lastlog location (can't detect it on some versions)
+ conf_lastlog_location="/var/adm/lastlog"
+ AC_MSG_CHECKING([for obsolete utmp and wtmp in solaris2.x])
+ sol2ver=`echo "$host"| sed -e 's/.*[[0-9]]\.//'`
+ if test "$sol2ver" -ge 8; then
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([DISABLE_UTMP])
+ AC_DEFINE([DISABLE_WTMP], [1],
+ [Define if you don't want to use wtmp])
+ else
+ AC_MSG_RESULT([no])
+ fi
+ AC_CHECK_FUNCS([setpflags])
+ AC_CHECK_FUNCS([setppriv])
+ AC_CHECK_FUNCS([priv_basicset])
+ AC_CHECK_HEADERS([priv.h])
+ AC_ARG_WITH([solaris-contracts],
+ [ --with-solaris-contracts Enable Solaris process contracts (experimental)],
+ [
+ AC_CHECK_LIB([contract], [ct_tmpl_activate],
+ [ AC_DEFINE([USE_SOLARIS_PROCESS_CONTRACTS], [1],
+ [Define if you have Solaris process contracts])
+ LIBS="$LIBS -lcontract"
+ SPC_MSG="yes" ], )
+ ],
+ )
+ AC_ARG_WITH([solaris-projects],
+ [ --with-solaris-projects Enable Solaris projects (experimental)],
+ [
+ AC_CHECK_LIB([project], [setproject],
+ [ AC_DEFINE([USE_SOLARIS_PROJECTS], [1],
+ [Define if you have Solaris projects])
+ LIBS="$LIBS -lproject"
+ SP_MSG="yes" ], )
+ ],
+ )
+ AC_ARG_WITH([solaris-privs],
+ [ --with-solaris-privs Enable Solaris/Illumos privileges (experimental)],
+ [
+ AC_MSG_CHECKING([for Solaris/Illumos privilege support])
+ if test "x$ac_cv_func_setppriv" = "xyes" -a \
+ "x$ac_cv_header_priv_h" = "xyes" ; then
+ SOLARIS_PRIVS=yes
+ AC_MSG_RESULT([found])
+ AC_DEFINE([NO_UID_RESTORATION_TEST], [1],
+ [Define to disable UID restoration test])
+ AC_DEFINE([USE_SOLARIS_PRIVS], [1],
+ [Define if you have Solaris privileges])
+ SPP_MSG="yes"
+ else
+ AC_MSG_RESULT([not found])
+ AC_MSG_ERROR([*** must have support for Solaris privileges to use --with-solaris-privs])
+ fi
+ ],
+ )
+ TEST_SHELL=$SHELL # let configure find us a capable shell
+ ;;
+*-*-sunos4*)
+ CPPFLAGS="$CPPFLAGS -DSUNOS4"
+ AC_CHECK_FUNCS([getpwanam])
+ AC_DEFINE([PAM_SUN_CODEBASE])
+ conf_utmp_location=/etc/utmp
+ conf_wtmp_location=/var/adm/wtmp
+ conf_lastlog_location=/var/adm/lastlog
+ AC_DEFINE([USE_PIPES])
+ AC_DEFINE([DISABLE_UTMPX], [1], [no utmpx])
+ ;;
+*-ncr-sysv*)
+ LIBS="$LIBS -lc89"
+ AC_DEFINE([USE_PIPES])
+ AC_DEFINE([SSHD_ACQUIRES_CTTY])
+ AC_DEFINE([SETEUID_BREAKS_SETUID])
+ AC_DEFINE([BROKEN_SETREUID])
+ AC_DEFINE([BROKEN_SETREGID])
+ ;;
+*-sni-sysv*)
+ # /usr/ucblib MUST NOT be searched on ReliantUNIX
+ AC_CHECK_LIB([dl], [dlsym], ,)
+ # -lresolv needs to be at the end of LIBS or DNS lookups break
+ AC_CHECK_LIB([resolv], [res_query], [ LIBS="$LIBS -lresolv" ])
+ IPADDR_IN_DISPLAY=yes
+ AC_DEFINE([USE_PIPES])
+ AC_DEFINE([IP_TOS_IS_BROKEN])
+ AC_DEFINE([SETEUID_BREAKS_SETUID])
+ AC_DEFINE([BROKEN_SETREUID])
+ AC_DEFINE([BROKEN_SETREGID])
+ AC_DEFINE([SSHD_ACQUIRES_CTTY])
+ external_path_file=/etc/default/login
+ # /usr/ucblib/libucb.a no longer needed on ReliantUNIX
+ # Attention: always take care to bind libsocket and libnsl before libc,
+ # otherwise you will find lots of "SIOCGPGRP errno 22" on syslog
+ ;;
+# UnixWare 1.x, UnixWare 2.x, and others based on code from Univel.
+*-*-sysv4.2*)
+ AC_DEFINE([USE_PIPES])
+ AC_DEFINE([SETEUID_BREAKS_SETUID])
+ AC_DEFINE([BROKEN_SETREUID])
+ AC_DEFINE([BROKEN_SETREGID])
+ AC_DEFINE([PASSWD_NEEDS_USERNAME], [1], [must supply username to passwd])
+ AC_DEFINE([LOCKED_PASSWD_STRING], ["*LK*"])
+ TEST_SHELL=$SHELL # let configure find us a capable shell
+ ;;
+# UnixWare 7.x, OpenUNIX 8
+*-*-sysv5*)
+ CPPFLAGS="$CPPFLAGS -Dvsnprintf=_xvsnprintf -Dsnprintf=_xsnprintf"
+ AC_DEFINE([UNIXWARE_LONG_PASSWORDS], [1], [Support passwords > 8 chars])
+ AC_DEFINE([USE_PIPES])
+ AC_DEFINE([SETEUID_BREAKS_SETUID])
+ AC_DEFINE([BROKEN_GETADDRINFO])
+ AC_DEFINE([BROKEN_SETREUID])
+ AC_DEFINE([BROKEN_SETREGID])
+ AC_DEFINE([PASSWD_NEEDS_USERNAME])
+ AC_DEFINE([BROKEN_TCGETATTR_ICANON])
+ TEST_SHELL=$SHELL # let configure find us a capable shell
+ check_for_libcrypt_later=1
+ case "$host" in
+ *-*-sysv5SCO_SV*) # SCO OpenServer 6.x
+ maildir=/var/spool/mail
+ AC_DEFINE([BROKEN_UPDWTMPX])
+ AC_CHECK_LIB([prot], [getluid], [ LIBS="$LIBS -lprot"
+ AC_CHECK_FUNCS([getluid setluid], , , [-lprot])
+ ], , )
+ ;;
+ *) AC_DEFINE([LOCKED_PASSWD_STRING], ["*LK*"])
+ ;;
+ esac
+ ;;
+*-*-sysv*)
+ ;;
+# SCO UNIX and OEM versions of SCO UNIX
+*-*-sco3.2v4*)
+ AC_MSG_ERROR("This Platform is no longer supported.")
+ ;;
+# SCO OpenServer 5.x
+*-*-sco3.2v5*)
+ if test -z "$GCC"; then
+ CFLAGS="$CFLAGS -belf"
+ fi
+ LIBS="$LIBS -lprot -lx -ltinfo -lm"
+ no_dev_ptmx=1
+ AC_DEFINE([USE_PIPES])
+ AC_DEFINE([HAVE_SECUREWARE])
+ AC_DEFINE([DISABLE_SHADOW])
+ AC_DEFINE([DISABLE_FD_PASSING])
+ AC_DEFINE([SETEUID_BREAKS_SETUID])
+ AC_DEFINE([BROKEN_GETADDRINFO])
+ AC_DEFINE([BROKEN_SETREUID])
+ AC_DEFINE([BROKEN_SETREGID])
+ AC_DEFINE([WITH_ABBREV_NO_TTY])
+ AC_DEFINE([BROKEN_UPDWTMPX])
+ AC_DEFINE([PASSWD_NEEDS_USERNAME])
+ AC_CHECK_FUNCS([getluid setluid])
+ MANTYPE=man
+ TEST_SHELL=$SHELL # let configure find us a capable shell
+ SKIP_DISABLE_LASTLOG_DEFINE=yes
+ ;;
+*-dec-osf*)
+ AC_MSG_CHECKING([for Digital Unix SIA])
+ no_osfsia=""
+ AC_ARG_WITH([osfsia],
+ [ --with-osfsia Enable Digital Unix SIA],
+ [
+ if test "x$withval" = "xno" ; then
+ AC_MSG_RESULT([disabled])
+ no_osfsia=1
+ fi
+ ],
+ )
+ if test -z "$no_osfsia" ; then
+ if test -f /etc/sia/matrix.conf; then
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([HAVE_OSF_SIA], [1],
+ [Define if you have Digital Unix Security
+ Integration Architecture])
+ AC_DEFINE([DISABLE_LOGIN], [1],
+ [Define if you don't want to use your
+ system's login() call])
+ AC_DEFINE([DISABLE_FD_PASSING])
+ LIBS="$LIBS -lsecurity -ldb -lm -laud"
+ SIA_MSG="yes"
+ else
+ AC_MSG_RESULT([no])
+ AC_DEFINE([LOCKED_PASSWD_SUBSTR], ["Nologin"],
+ [String used in /etc/passwd to denote locked account])
+ fi
+ fi
+ AC_DEFINE([BROKEN_GETADDRINFO])
+ AC_DEFINE([SETEUID_BREAKS_SETUID])
+ AC_DEFINE([BROKEN_SETREUID])
+ AC_DEFINE([BROKEN_SETREGID])
+ AC_DEFINE([BROKEN_READV_COMPARISON], [1], [Can't do comparisons on readv])
+ ;;
+
+*-*-nto-qnx*)
+ AC_DEFINE([USE_PIPES])
+ AC_DEFINE([NO_X11_UNIX_SOCKETS])
+ AC_DEFINE([DISABLE_LASTLOG])
+ AC_DEFINE([SSHD_ACQUIRES_CTTY])
+ AC_DEFINE([BROKEN_SHADOW_EXPIRE], [1], [QNX shadow support is broken])
+ enable_etc_default_login=no # has incompatible /etc/default/login
+ case "$host" in
+ *-*-nto-qnx6*)
+ AC_DEFINE([DISABLE_FD_PASSING])
+ ;;
+ esac
+ ;;
+
+*-*-ultrix*)
+ AC_DEFINE([BROKEN_GETGROUPS], [1], [getgroups(0,NULL) will return -1])
+ AC_DEFINE([NEED_SETPGRP], [1], [Need setpgrp to for controlling tty])
+ AC_DEFINE([HAVE_SYS_SYSLOG_H], [1], [Force use of sys/syslog.h on Ultrix])
+ AC_DEFINE([DISABLE_UTMPX], [1], [Disable utmpx])
+ # DISABLE_FD_PASSING so that we call setpgrp as root, otherwise we
+ # don't get a controlling tty.
+ AC_DEFINE([DISABLE_FD_PASSING], [1], [Need to call setpgrp as root])
+ # On Ultrix some headers are not protected against multiple includes,
+ # so we create wrappers and put it where the compiler will find it.
+ AC_MSG_WARN([creating compat wrappers for headers])
+ mkdir -p netinet
+ for header in netinet/ip.h netdb.h resolv.h; do
+ name=`echo $header | tr 'a-z/.' 'A-Z__'`
+ cat >$header <<EOD
+#ifndef _SSH_COMPAT_${name}
+#define _SSH_COMPAT_${name}
+#include "/usr/include/${header}"
+#endif
+EOD
+ done
+ ;;
+
+*-*-lynxos)
+ CFLAGS="$CFLAGS -D__NO_INCLUDE_WARN__"
+ AC_DEFINE([BROKEN_SETVBUF], [1],
+ [LynxOS has broken setvbuf() implementation])
+ ;;
+esac
+
+AC_MSG_CHECKING([compiler and flags for sanity])
+AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include <stdlib.h> ]], [[ exit(0); ]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [
+ AC_MSG_RESULT([no])
+ AC_MSG_ERROR([*** compiler cannot create working executables, check config.log ***])
+ ],
+ [ AC_MSG_WARN([cross compiling: not checking compiler sanity]) ]
+)
+
+dnl Checks for header files.
+# Checks for libraries.
+AC_CHECK_FUNC([setsockopt], , [AC_CHECK_LIB([socket], [setsockopt])])
+
+dnl IRIX and Solaris 2.5.1 have dirname() in libgen
+AC_CHECK_FUNCS([dirname], [AC_CHECK_HEADERS([libgen.h])] , [
+ AC_CHECK_LIB([gen], [dirname], [
+ AC_CACHE_CHECK([for broken dirname],
+ ac_cv_have_broken_dirname, [
+ save_LIBS="$LIBS"
+ LIBS="$LIBS -lgen"
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
+#include <libgen.h>
+#include <string.h>
+#include <stdlib.h>
+
+int main(int argc, char **argv) {
+ char *s, buf[32];
+
+ strncpy(buf,"/etc", 32);
+ s = dirname(buf);
+ if (!s || strncmp(s, "/", 32) != 0) {
+ exit(1);
+ } else {
+ exit(0);
+ }
+}
+ ]])],
+ [ ac_cv_have_broken_dirname="no" ],
+ [ ac_cv_have_broken_dirname="yes" ],
+ [ ac_cv_have_broken_dirname="no" ],
+ )
+ LIBS="$save_LIBS"
+ ])
+ if test "x$ac_cv_have_broken_dirname" = "xno" ; then
+ LIBS="$LIBS -lgen"
+ AC_DEFINE([HAVE_DIRNAME])
+ AC_CHECK_HEADERS([libgen.h])
+ fi
+ ])
+])
+
+AC_CHECK_FUNC([getspnam], ,
+ [AC_CHECK_LIB([gen], [getspnam], [LIBS="$LIBS -lgen"])])
+AC_SEARCH_LIBS([basename], [gen], [AC_DEFINE([HAVE_BASENAME], [1],
+ [Define if you have the basename function.])])
+
+dnl zlib defaults to enabled
+zlib=yes
+AC_ARG_WITH([zlib],
+ [ --with-zlib=PATH Use zlib in PATH],
+ [ if test "x$withval" = "xno" ; then
+ zlib=no
+ elif test "x$withval" != "xyes"; then
+ if test -d "$withval/lib"; then
+ if test -n "${rpath_opt}"; then
+ LDFLAGS="-L${withval}/lib ${rpath_opt}${withval}/lib ${LDFLAGS}"
+ else
+ LDFLAGS="-L${withval}/lib ${LDFLAGS}"
+ fi
+ else
+ if test -n "${rpath_opt}"; then
+ LDFLAGS="-L${withval} ${rpath_opt}${withval} ${LDFLAGS}"
+ else
+ LDFLAGS="-L${withval} ${LDFLAGS}"
+ fi
+ fi
+ if test -d "$withval/include"; then
+ CPPFLAGS="-I${withval}/include ${CPPFLAGS}"
+ else
+ CPPFLAGS="-I${withval} ${CPPFLAGS}"
+ fi
+ fi ]
+)
+
+AC_MSG_CHECKING([for zlib])
+if test "x${zlib}" = "xno"; then
+ AC_MSG_RESULT([no])
+else
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([WITH_ZLIB], [1], [Enable zlib])
+ AC_CHECK_HEADER([zlib.h], ,[AC_MSG_ERROR([*** zlib.h missing - please install first or check config.log ***])])
+ AC_CHECK_LIB([z], [deflate], ,
+ [
+ saved_CPPFLAGS="$CPPFLAGS"
+ saved_LDFLAGS="$LDFLAGS"
+ save_LIBS="$LIBS"
+ dnl Check default zlib install dir
+ if test -n "${rpath_opt}"; then
+ LDFLAGS="-L/usr/local/lib ${rpath_opt}/usr/local/lib ${saved_LDFLAGS}"
+ else
+ LDFLAGS="-L/usr/local/lib ${saved_LDFLAGS}"
+ fi
+ CPPFLAGS="-I/usr/local/include ${saved_CPPFLAGS}"
+ LIBS="$LIBS -lz"
+ AC_TRY_LINK_FUNC([deflate], [AC_DEFINE([HAVE_LIBZ])],
+ [
+ AC_MSG_ERROR([*** zlib missing - please install first or check config.log ***])
+ ]
+ )
+ ]
+ )
+
+ AC_ARG_WITH([zlib-version-check],
+ [ --without-zlib-version-check Disable zlib version check],
+ [ if test "x$withval" = "xno" ; then
+ zlib_check_nonfatal=1
+ fi
+ ]
+ )
+
+ AC_MSG_CHECKING([for possibly buggy zlib])
+ AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+#include <stdio.h>
+#include <stdlib.h>
+#include <zlib.h>
+ ]],
+ [[
+ int a=0, b=0, c=0, d=0, n, v;
+ n = sscanf(ZLIB_VERSION, "%d.%d.%d.%d", &a, &b, &c, &d);
+ if (n != 3 && n != 4)
+ exit(1);
+ v = a*1000000 + b*10000 + c*100 + d;
+ fprintf(stderr, "found zlib version %s (%d)\n", ZLIB_VERSION, v);
+
+ /* 1.1.4 is OK */
+ if (a == 1 && b == 1 && c >= 4)
+ exit(0);
+
+ /* 1.2.3 and up are OK */
+ if (v >= 1020300)
+ exit(0);
+
+ exit(2);
+ ]])],
+ AC_MSG_RESULT([no]),
+ [ AC_MSG_RESULT([yes])
+ if test -z "$zlib_check_nonfatal" ; then
+ AC_MSG_ERROR([*** zlib too old - check config.log ***
+Your reported zlib version has known security problems. It's possible your
+vendor has fixed these problems without changing the version number. If you
+are sure this is the case, you can disable the check by running
+"./configure --without-zlib-version-check".
+If you are in doubt, upgrade zlib to version 1.2.3 or greater.
+See http://www.gzip.org/zlib/ for details.])
+ else
+ AC_MSG_WARN([zlib version may have security problems])
+ fi
+ ],
+ [ AC_MSG_WARN([cross compiling: not checking zlib version]) ]
+ )
+fi
+
+dnl UnixWare 2.x
+AC_CHECK_FUNC([strcasecmp],
+ [], [ AC_CHECK_LIB([resolv], [strcasecmp], [LIBS="$LIBS -lresolv"]) ]
+)
+AC_CHECK_FUNCS([utimes],
+ [], [ AC_CHECK_LIB([c89], [utimes], [AC_DEFINE([HAVE_UTIMES])
+ LIBS="$LIBS -lc89"]) ]
+)
+
+dnl Checks for libutil functions
+AC_CHECK_HEADERS([bsd/libutil.h libutil.h])
+AC_SEARCH_LIBS([fmt_scaled], [util bsd])
+AC_SEARCH_LIBS([scan_scaled], [util bsd])
+AC_SEARCH_LIBS([login], [util bsd])
+AC_SEARCH_LIBS([logout], [util bsd])
+AC_SEARCH_LIBS([logwtmp], [util bsd])
+AC_SEARCH_LIBS([openpty], [util bsd])
+AC_SEARCH_LIBS([updwtmp], [util bsd])
+AC_CHECK_FUNCS([fmt_scaled scan_scaled login logout openpty updwtmp logwtmp])
+
+# On some platforms, inet_ntop and gethostbyname may be found in libresolv
+# or libnsl.
+AC_SEARCH_LIBS([inet_ntop], [resolv nsl])
+AC_SEARCH_LIBS([gethostbyname], [resolv nsl])
+
+# Some Linux distribtions ship the BSD libc hashing functions in
+# separate libraries.
+AC_SEARCH_LIBS([SHA256Update], [md bsd])
+
+# "Particular Function Checks"
+# see https://www.gnu.org/software/autoconf/manual/autoconf-2.69/html_node/Particular-Functions.html
+AC_FUNC_STRFTIME
+AC_FUNC_MALLOC
+AC_FUNC_REALLOC
+# autoconf doesn't have AC_FUNC_CALLOC so fake it if malloc returns NULL;
+AC_MSG_CHECKING([if calloc(0, N) returns non-null])
+AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[ #include <stdlib.h> ]],
+ [[ void *p = calloc(0, 1); exit(p == NULL); ]]
+ )],
+ [ func_calloc_0_nonnull=yes ],
+ [ func_calloc_0_nonnull=no ],
+ [ AC_MSG_WARN([cross compiling: assuming same as malloc])
+ func_calloc_0_nonnull="$ac_cv_func_malloc_0_nonnull"]
+)
+AC_MSG_RESULT([$func_calloc_0_nonnull])
+
+if test "x$func_calloc_0_nonnull" = "xyes"; then
+ AC_DEFINE(HAVE_CALLOC, 1, [calloc(0, x) returns non-null])
+else
+ AC_DEFINE(HAVE_CALLOC, 0, [calloc(0, x) returns NULL])
+ AC_DEFINE(calloc, rpl_calloc,
+ [Define to rpl_calloc if the replacement function should be used.])
+fi
+
+# Check for ALTDIRFUNC glob() extension
+AC_MSG_CHECKING([for GLOB_ALTDIRFUNC support])
+AC_EGREP_CPP([FOUNDIT],
+ [
+ #include <glob.h>
+ #ifdef GLOB_ALTDIRFUNC
+ FOUNDIT
+ #endif
+ ],
+ [
+ AC_DEFINE([GLOB_HAS_ALTDIRFUNC], [1],
+ [Define if your system glob() function has
+ the GLOB_ALTDIRFUNC extension])
+ AC_MSG_RESULT([yes])
+ ],
+ [
+ AC_MSG_RESULT([no])
+ ]
+)
+
+# Check for g.gl_matchc glob() extension
+AC_MSG_CHECKING([for gl_matchc field in glob_t])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <glob.h> ]],
+ [[ glob_t g; g.gl_matchc = 1; ]])],
+ [
+ AC_DEFINE([GLOB_HAS_GL_MATCHC], [1],
+ [Define if your system glob() function has
+ gl_matchc options in glob_t])
+ AC_MSG_RESULT([yes])
+ ], [
+ AC_MSG_RESULT([no])
+])
+
+# Check for g.gl_statv glob() extension
+AC_MSG_CHECKING([for gl_statv and GLOB_KEEPSTAT extensions for glob])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <glob.h> ]], [[
+#ifndef GLOB_KEEPSTAT
+#error "glob does not support GLOB_KEEPSTAT extension"
+#endif
+glob_t g;
+g.gl_statv = NULL;
+]])],
+ [
+ AC_DEFINE([GLOB_HAS_GL_STATV], [1],
+ [Define if your system glob() function has
+ gl_statv options in glob_t])
+ AC_MSG_RESULT([yes])
+ ], [
+ AC_MSG_RESULT([no])
+
+])
+
+AC_CHECK_DECLS([GLOB_NOMATCH], , , [#include <glob.h>])
+
+AC_CHECK_DECL([VIS_ALL], ,
+ AC_DEFINE(BROKEN_STRNVIS, 1, [missing VIS_ALL]), [#include <vis.h>])
+
+AC_MSG_CHECKING([whether struct dirent allocates space for d_name])
+AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <dirent.h>
+#include <stdlib.h>
+ ]],
+ [[
+ struct dirent d;
+ exit(sizeof(d.d_name)<=sizeof(char));
+ ]])],
+ [AC_MSG_RESULT([yes])],
+ [
+ AC_MSG_RESULT([no])
+ AC_DEFINE([BROKEN_ONE_BYTE_DIRENT_D_NAME], [1],
+ [Define if your struct dirent expects you to
+ allocate extra space for d_name])
+ ],
+ [
+ AC_MSG_WARN([cross compiling: assuming BROKEN_ONE_BYTE_DIRENT_D_NAME])
+ AC_DEFINE([BROKEN_ONE_BYTE_DIRENT_D_NAME])
+ ]
+)
+
+AC_MSG_CHECKING([for /proc/pid/fd directory])
+if test -d "/proc/$$/fd" ; then
+ AC_DEFINE([HAVE_PROC_PID], [1], [Define if you have /proc/$pid/fd])
+ AC_MSG_RESULT([yes])
+else
+ AC_MSG_RESULT([no])
+fi
+
+# Check whether user wants TCP wrappers support
+TCPW_MSG="no"
+AC_ARG_WITH([tcp-wrappers],
+ [ --with-tcp-wrappers[[=PATH]] Enable tcpwrappers support (optionally in PATH)],
+ [
+ if test "x$withval" != "xno" ; then
+ saved_LIBS="$LIBS"
+ saved_LDFLAGS="$LDFLAGS"
+ saved_CPPFLAGS="$CPPFLAGS"
+ if test -n "${withval}" && \
+ test "x${withval}" != "xyes"; then
+ if test -d "${withval}/lib"; then
+ if test -n "${need_dash_r}"; then
+ LDFLAGS="-L${withval}/lib -R${withval}/lib ${LDFLAGS}"
+ else
+ LDFLAGS="-L${withval}/lib ${LDFLAGS}"
+ fi
+ else
+ if test -n "${need_dash_r}"; then
+ LDFLAGS="-L${withval} -R${withval} ${LDFLAGS}"
+ else
+ LDFLAGS="-L${withval} ${LDFLAGS}"
+ fi
+ fi
+ if test -d "${withval}/include"; then
+ CPPFLAGS="-I${withval}/include ${CPPFLAGS}"
+ else
+ CPPFLAGS="-I${withval} ${CPPFLAGS}"
+ fi
+ fi
+ LIBS="-lwrap -lnsl $LIBS"
+ AC_MSG_CHECKING([for libwrap])
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <tcpd.h>
+int deny_severity = 0, allow_severity = 0;
+ ]], [[
+ hosts_access(0);
+ ]])], [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([LIBWRAP], [1],
+ [Define if you want
+ TCP Wrappers support])
+ SSHDLIBS="$SSHDLIBS -lwrap -lnsl"
+ TCPW_MSG="yes"
+ ], [
+ AC_MSG_ERROR([*** libwrap missing])
+
+ ])
+ LIBS="$saved_LIBS"
+ fi
+ ]
+)
+
+# Check whether user wants to use ldns
+LDNS_MSG="no"
+AC_ARG_WITH(ldns,
+ [ --with-ldns[[=PATH]] Use ldns for DNSSEC support (optionally in PATH)],
+ [
+ ldns=""
+ if test "x$withval" = "xyes" ; then
+ AC_PATH_TOOL([LDNSCONFIG], [ldns-config], [no])
+ if test "x$LDNSCONFIG" = "xno"; then
+ LIBS="-lldns $LIBS"
+ ldns=yes
+ else
+ LIBS="$LIBS `$LDNSCONFIG --libs`"
+ CPPFLAGS="$CPPFLAGS `$LDNSCONFIG --cflags`"
+ ldns=yes
+ fi
+ elif test "x$withval" != "xno" ; then
+ CPPFLAGS="$CPPFLAGS -I${withval}/include"
+ LDFLAGS="$LDFLAGS -L${withval}/lib"
+ LIBS="-lldns $LIBS"
+ ldns=yes
+ fi
+
+ # Verify that it works.
+ if test "x$ldns" = "xyes" ; then
+ AC_DEFINE(HAVE_LDNS, 1, [Define if you want ldns support])
+ LDNS_MSG="yes"
+ AC_MSG_CHECKING([for ldns support])
+ AC_LINK_IFELSE(
+ [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+#include <ldns/ldns.h>
+int main() { ldns_status status = ldns_verify_trusted(NULL, NULL, NULL, NULL); status=LDNS_STATUS_OK; exit(0); }
+ ]])
+ ],
+ [AC_MSG_RESULT(yes)],
+ [
+ AC_MSG_RESULT(no)
+ AC_MSG_ERROR([** Incomplete or missing ldns libraries.])
+ ])
+ fi
+])
+
+# Check whether user wants libedit support
+LIBEDIT_MSG="no"
+AC_ARG_WITH([libedit],
+ [ --with-libedit[[=PATH]] Enable libedit support for sftp],
+ [ if test "x$withval" != "xno" ; then
+ if test "x$withval" = "xyes" ; then
+ AC_PATH_TOOL([PKGCONFIG], [pkg-config], [no])
+ if test "x$PKGCONFIG" != "xno"; then
+ AC_MSG_CHECKING([if $PKGCONFIG knows about libedit])
+ if "$PKGCONFIG" libedit; then
+ AC_MSG_RESULT([yes])
+ use_pkgconfig_for_libedit=yes
+ else
+ AC_MSG_RESULT([no])
+ fi
+ fi
+ else
+ CPPFLAGS="$CPPFLAGS -I${withval}/include"
+ if test -n "${rpath_opt}"; then
+ LDFLAGS="-L${withval}/lib ${rpath_opt}${withval}/lib ${LDFLAGS}"
+ else
+ LDFLAGS="-L${withval}/lib ${LDFLAGS}"
+ fi
+ fi
+ if test "x$use_pkgconfig_for_libedit" = "xyes"; then
+ LIBEDIT=`$PKGCONFIG --libs libedit`
+ CPPFLAGS="$CPPFLAGS `$PKGCONFIG --cflags libedit`"
+ else
+ LIBEDIT="-ledit -lcurses"
+ fi
+ OTHERLIBS=`echo $LIBEDIT | sed 's/-ledit//'`
+ AC_CHECK_LIB([edit], [el_init],
+ [ AC_DEFINE([USE_LIBEDIT], [1], [Use libedit for sftp])
+ LIBEDIT_MSG="yes"
+ AC_SUBST([LIBEDIT])
+ ],
+ [ AC_MSG_ERROR([libedit not found]) ],
+ [ $OTHERLIBS ]
+ )
+ AC_MSG_CHECKING([if libedit version is compatible])
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <histedit.h>
+#include <stdlib.h>
+ ]],
+ [[
+ int i = H_SETSIZE;
+ el_init("", NULL, NULL, NULL);
+ exit(0);
+ ]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [ AC_MSG_RESULT([no])
+ AC_MSG_ERROR([libedit version is not compatible]) ]
+ )
+ fi ]
+)
+
+AUDIT_MODULE=none
+AC_ARG_WITH([audit],
+ [ --with-audit=module Enable audit support (modules=debug,bsm,linux)],
+ [
+ AC_MSG_CHECKING([for supported audit module])
+ case "$withval" in
+ bsm)
+ AC_MSG_RESULT([bsm])
+ AUDIT_MODULE=bsm
+ dnl Checks for headers, libs and functions
+ AC_CHECK_HEADERS([bsm/audit.h], [],
+ [AC_MSG_ERROR([BSM enabled and bsm/audit.h not found])],
+ [
+#ifdef HAVE_TIME_H
+# include <time.h>
+#endif
+ ]
+)
+ AC_CHECK_LIB([bsm], [getaudit], [],
+ [AC_MSG_ERROR([BSM enabled and required library not found])])
+ AC_CHECK_FUNCS([getaudit], [],
+ [AC_MSG_ERROR([BSM enabled and required function not found])])
+ # These are optional
+ AC_CHECK_FUNCS([getaudit_addr aug_get_machine])
+ AC_DEFINE([USE_BSM_AUDIT], [1], [Use BSM audit module])
+ if test "$sol2ver" -ge 11; then
+ SSHDLIBS="$SSHDLIBS -lscf"
+ AC_DEFINE([BROKEN_BSM_API], [1],
+ [The system has incomplete BSM API])
+ fi
+ ;;
+ linux)
+ AC_MSG_RESULT([linux])
+ AUDIT_MODULE=linux
+ dnl Checks for headers, libs and functions
+ AC_CHECK_HEADERS([libaudit.h])
+ SSHDLIBS="$SSHDLIBS -laudit"
+ AC_DEFINE([USE_LINUX_AUDIT], [1], [Use Linux audit module])
+ ;;
+ debug)
+ AUDIT_MODULE=debug
+ AC_MSG_RESULT([debug])
+ AC_DEFINE([SSH_AUDIT_EVENTS], [1], [Use audit debugging module])
+ ;;
+ no)
+ AC_MSG_RESULT([no])
+ ;;
+ *)
+ AC_MSG_ERROR([Unknown audit module $withval])
+ ;;
+ esac ]
+)
+
+AC_ARG_WITH([pie],
+ [ --with-pie Build Position Independent Executables if possible], [
+ if test "x$withval" = "xno"; then
+ use_pie=no
+ fi
+ if test "x$withval" = "xyes"; then
+ use_pie=yes
+ fi
+ ]
+)
+if test "x$use_pie" = "x"; then
+ use_pie=no
+fi
+if test "x$use_toolchain_hardening" != "x1" && test "x$use_pie" = "xauto"; then
+ # Turn off automatic PIE when toolchain hardening is off.
+ use_pie=no
+fi
+if test "x$use_pie" = "xauto"; then
+ # Automatic PIE requires gcc >= 4.x
+ AC_MSG_CHECKING([for gcc >= 4.x])
+ AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
+#if !defined(__GNUC__) || __GNUC__ < 4
+#error gcc is too old
+#endif
+]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [ AC_MSG_RESULT([no])
+ use_pie=no ]
+)
+fi
+if test "x$use_pie" != "xno"; then
+ SAVED_CFLAGS="$CFLAGS"
+ SAVED_LDFLAGS="$LDFLAGS"
+ OSSH_CHECK_CFLAG_COMPILE([-fPIE])
+ OSSH_CHECK_LDFLAG_LINK([-pie])
+ # We use both -fPIE and -pie or neither.
+ AC_MSG_CHECKING([whether both -fPIE and -pie are supported])
+ if echo "x $CFLAGS" | grep ' -fPIE' >/dev/null 2>&1 && \
+ echo "x $LDFLAGS" | grep ' -pie' >/dev/null 2>&1 ; then
+ AC_MSG_RESULT([yes])
+ else
+ AC_MSG_RESULT([no])
+ CFLAGS="$SAVED_CFLAGS"
+ LDFLAGS="$SAVED_LDFLAGS"
+ fi
+fi
+
+AC_MSG_CHECKING([whether -fPIC is accepted])
+SAVED_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -fPIC"
+AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM( [[ #include <stdlib.h> ]], [[ exit(0); ]] )],
+ [AC_MSG_RESULT([yes])
+ PICFLAG="-fPIC"; ],
+ [AC_MSG_RESULT([no])
+ PICFLAG=""; ])
+CFLAGS="$SAVED_CFLAGS"
+AC_SUBST([PICFLAG])
+
+dnl Checks for library functions. Please keep in alphabetical order
+AC_CHECK_FUNCS([ \
+ Blowfish_initstate \
+ Blowfish_expandstate \
+ Blowfish_expand0state \
+ Blowfish_stream2word \
+ SHA256Update \
+ SHA384Update \
+ SHA512Update \
+ asprintf \
+ b64_ntop \
+ __b64_ntop \
+ b64_pton \
+ __b64_pton \
+ bcopy \
+ bcrypt_pbkdf \
+ bindresvport_sa \
+ blf_enc \
+ bzero \
+ cap_rights_limit \
+ clock \
+ closefrom \
+ dirfd \
+ endgrent \
+ err \
+ errx \
+ explicit_bzero \
+ explicit_memset \
+ fchmod \
+ fchmodat \
+ fchown \
+ fchownat \
+ flock \
+ fnmatch \
+ freeaddrinfo \
+ freezero \
+ fstatfs \
+ fstatvfs \
+ futimes \
+ getaddrinfo \
+ getcwd \
+ getgrouplist \
+ getline \
+ getnameinfo \
+ getopt \
+ getpagesize \
+ getpeereid \
+ getpeerucred \
+ getpgid \
+ _getpty \
+ getrlimit \
+ getrandom \
+ getsid \
+ getttyent \
+ glob \
+ group_from_gid \
+ inet_aton \
+ inet_ntoa \
+ inet_ntop \
+ innetgr \
+ llabs \
+ localtime_r \
+ login_getcapbool \
+ login_getpwclass \
+ md5_crypt \
+ memmem \
+ memmove \
+ memset_s \
+ mkdtemp \
+ ngetaddrinfo \
+ nsleep \
+ ogetaddrinfo \
+ openlog_r \
+ pledge \
+ poll \
+ prctl \
+ pstat \
+ raise \
+ readpassphrase \
+ reallocarray \
+ realpath \
+ recvmsg \
+ recallocarray \
+ rresvport_af \
+ sendmsg \
+ setdtablesize \
+ setegid \
+ setenv \
+ seteuid \
+ setgroupent \
+ setgroups \
+ setlinebuf \
+ setlogin \
+ setpassent\
+ setpcred \
+ setproctitle \
+ setregid \
+ setreuid \
+ setrlimit \
+ setsid \
+ setvbuf \
+ sigaction \
+ sigvec \
+ snprintf \
+ socketpair \
+ statfs \
+ statvfs \
+ strcasestr \
+ strdup \
+ strerror \
+ strlcat \
+ strlcpy \
+ strmode \
+ strndup \
+ strnlen \
+ strnvis \
+ strptime \
+ strsignal \
+ strtonum \
+ strtoll \
+ strtoul \
+ strtoull \
+ swap32 \
+ sysconf \
+ tcgetpgrp \
+ timingsafe_bcmp \
+ truncate \
+ unsetenv \
+ updwtmpx \
+ utimensat \
+ user_from_uid \
+ usleep \
+ vasprintf \
+ vsnprintf \
+ waitpid \
+ warn \
+])
+
+AC_CHECK_DECLS([bzero, memmem])
+
+dnl Wide character support.
+AC_CHECK_FUNCS([mblen mbtowc nl_langinfo wcwidth])
+
+TEST_SSH_UTF8=${TEST_SSH_UTF8:=yes}
+AC_MSG_CHECKING([for utf8 locale support])
+AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <locale.h>
+#include <stdlib.h>
+ ]], [[
+ char *loc = setlocale(LC_CTYPE, "en_US.UTF-8");
+ if (loc != NULL)
+ exit(0);
+ exit(1);
+ ]])],
+ AC_MSG_RESULT(yes),
+ [AC_MSG_RESULT(no)
+ TEST_SSH_UTF8=no],
+ AC_MSG_WARN([cross compiling: assuming yes])
+)
+
+AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[ #include <ctype.h> ]],
+ [[ return (isblank('a')); ]])],
+ [AC_DEFINE([HAVE_ISBLANK], [1], [Define if you have isblank(3C).])
+])
+
+disable_pkcs11=
+AC_ARG_ENABLE([pkcs11],
+ [ --disable-pkcs11 disable PKCS#11 support code [no]],
+ [
+ if test "x$enableval" = "xno" ; then
+ disable_pkcs11=1
+ fi
+ ]
+)
+
+disable_sk=
+AC_ARG_ENABLE([security-key],
+ [ --disable-security-key disable U2F/FIDO support code [no]],
+ [
+ if test "x$enableval" = "xno" ; then
+ disable_sk=1
+ fi
+ ]
+)
+enable_sk_internal=
+AC_ARG_WITH([security-key-builtin],
+ [ --with-security-key-builtin include builtin U2F/FIDO support],
+ [
+ if test "x$withval" != "xno" ; then
+ enable_sk_internal=yes
+ fi
+ ]
+)
+test "x$disable_sk" != "x" && enable_sk_internal=""
+
+AC_SEARCH_LIBS([dlopen], [dl])
+AC_CHECK_FUNCS([dlopen])
+AC_CHECK_DECL([RTLD_NOW], [], [], [#include <dlfcn.h>])
+
+# IRIX has a const char return value for gai_strerror()
+AC_CHECK_FUNCS([gai_strerror], [
+ AC_DEFINE([HAVE_GAI_STRERROR])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+
+const char *gai_strerror(int);
+ ]], [[
+ char *str;
+ str = gai_strerror(0);
+ ]])], [
+ AC_DEFINE([HAVE_CONST_GAI_STRERROR_PROTO], [1],
+ [Define if gai_strerror() returns const char *])], [])])
+
+AC_SEARCH_LIBS([nanosleep], [rt posix4], [AC_DEFINE([HAVE_NANOSLEEP], [1],
+ [Some systems put nanosleep outside of libc])])
+
+AC_SEARCH_LIBS([clock_gettime], [rt],
+ [AC_DEFINE([HAVE_CLOCK_GETTIME], [1], [Have clock_gettime])])
+
+dnl check if we need -D_REENTRANT for localtime_r declaration.
+AC_CHECK_DECL([localtime_r], [],
+ [ saved_CPPFLAGS="$CPPFLAGS"
+ CPPFLAGS="$CPPFLAGS -D_REENTRANT"
+ unset ac_cv_have_decl_localtime_r
+ AC_CHECK_DECL([localtime_r], [],
+ [ CPPFLAGS="$saved_CPPFLAGS" ],
+ [ #include <time.h> ]
+ )
+ ],
+ [ #include <time.h> ]
+)
+
+dnl Make sure prototypes are defined for these before using them.
+AC_CHECK_DECL([strsep],
+ [AC_CHECK_FUNCS([strsep])],
+ [],
+ [
+#ifdef HAVE_STRING_H
+# include <string.h>
+#endif
+ ])
+
+dnl tcsendbreak might be a macro
+AC_CHECK_DECL([tcsendbreak],
+ [AC_DEFINE([HAVE_TCSENDBREAK])],
+ [AC_CHECK_FUNCS([tcsendbreak])],
+ [#include <termios.h>]
+)
+
+AC_CHECK_DECLS([h_errno], , ,[#include <netdb.h>])
+
+AC_CHECK_DECLS([SHUT_RD, getpeereid], , ,
+ [
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <unistd.h>
+ ])
+
+AC_CHECK_DECLS([O_NONBLOCK], , ,
+ [
+#include <sys/types.h>
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#ifdef HAVE_FCNTL_H
+# include <fcntl.h>
+#endif
+ ])
+
+AC_CHECK_DECLS([readv, writev], , , [
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <unistd.h>
+ ])
+
+AC_CHECK_DECLS([MAXSYMLINKS], , , [
+#include <sys/param.h>
+ ])
+
+AC_CHECK_DECLS([offsetof], , , [
+#include <stddef.h>
+ ])
+
+# extra bits for select(2)
+AC_CHECK_DECLS([howmany, NFDBITS], [], [], [[
+#include <sys/param.h>
+#include <sys/types.h>
+#ifdef HAVE_SYS_SYSMACROS_H
+#include <sys/sysmacros.h>
+#endif
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+ ]])
+AC_CHECK_TYPES([fd_mask], [], [], [[
+#include <sys/param.h>
+#include <sys/types.h>
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+ ]])
+
+AC_CHECK_FUNCS([setresuid], [
+ dnl Some platorms have setresuid that isn't implemented, test for this
+ AC_MSG_CHECKING([if setresuid seems to work])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <stdlib.h>
+#include <errno.h>
+ ]], [[
+ errno=0;
+ setresuid(0,0,0);
+ if (errno==ENOSYS)
+ exit(1);
+ else
+ exit(0);
+ ]])],
+ [AC_MSG_RESULT([yes])],
+ [AC_DEFINE([BROKEN_SETRESUID], [1],
+ [Define if your setresuid() is broken])
+ AC_MSG_RESULT([not implemented])],
+ [AC_MSG_WARN([cross compiling: not checking setresuid])]
+ )
+])
+
+AC_CHECK_FUNCS([setresgid], [
+ dnl Some platorms have setresgid that isn't implemented, test for this
+ AC_MSG_CHECKING([if setresgid seems to work])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <stdlib.h>
+#include <errno.h>
+ ]], [[
+ errno=0;
+ setresgid(0,0,0);
+ if (errno==ENOSYS)
+ exit(1);
+ else
+ exit(0);
+ ]])],
+ [AC_MSG_RESULT([yes])],
+ [AC_DEFINE([BROKEN_SETRESGID], [1],
+ [Define if your setresgid() is broken])
+ AC_MSG_RESULT([not implemented])],
+ [AC_MSG_WARN([cross compiling: not checking setresuid])]
+ )
+])
+
+AC_MSG_CHECKING([for working fflush(NULL)])
+AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <stdio.h>
+#include <stdlib.h>
+ ]],
+ [[fflush(NULL); exit(0);]])],
+ AC_MSG_RESULT([yes]),
+ [AC_MSG_RESULT([no])
+ AC_DEFINE([FFLUSH_NULL_BUG], [1],
+ [define if fflush(NULL) does not work])],
+ AC_MSG_WARN([cross compiling: assuming working])
+)
+
+dnl Checks for time functions
+AC_CHECK_FUNCS([gettimeofday time])
+dnl Checks for utmp functions
+AC_CHECK_FUNCS([endutent getutent getutid getutline pututline setutent])
+AC_CHECK_FUNCS([utmpname])
+dnl Checks for utmpx functions
+AC_CHECK_FUNCS([endutxent getutxent getutxid getutxline getutxuser pututxline])
+AC_CHECK_FUNCS([setutxdb setutxent utmpxname])
+dnl Checks for lastlog functions
+AC_CHECK_FUNCS([getlastlogxbyname])
+
+AC_CHECK_FUNC([daemon],
+ [AC_DEFINE([HAVE_DAEMON], [1], [Define if your libraries define daemon()])],
+ [AC_CHECK_LIB([bsd], [daemon],
+ [LIBS="$LIBS -lbsd"; AC_DEFINE([HAVE_DAEMON])])]
+)
+
+AC_CHECK_FUNC([getpagesize],
+ [AC_DEFINE([HAVE_GETPAGESIZE], [1],
+ [Define if your libraries define getpagesize()])],
+ [AC_CHECK_LIB([ucb], [getpagesize],
+ [LIBS="$LIBS -lucb"; AC_DEFINE([HAVE_GETPAGESIZE])])]
+)
+
+# Check for broken snprintf
+if test "x$ac_cv_func_snprintf" = "xyes" ; then
+ AC_MSG_CHECKING([whether snprintf correctly terminates long strings])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <stdio.h>
+#include <stdlib.h>
+ ]],
+ [[
+ char b[5];
+ snprintf(b,5,"123456789");
+ exit(b[4]!='\0');
+ ]])],
+ [AC_MSG_RESULT([yes])],
+ [
+ AC_MSG_RESULT([no])
+ AC_DEFINE([BROKEN_SNPRINTF], [1],
+ [Define if your snprintf is busted])
+ AC_MSG_WARN([****** Your snprintf() function is broken, complain to your vendor])
+ ],
+ [ AC_MSG_WARN([cross compiling: Assuming working snprintf()]) ]
+ )
+fi
+
+if test "x$ac_cv_func_snprintf" = "xyes" ; then
+ AC_MSG_CHECKING([whether snprintf understands %zu])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+ ]],
+ [[
+ size_t a = 1, b = 2;
+ char z[128];
+ snprintf(z, sizeof z, "%zu%zu", a, b);
+ exit(strcmp(z, "12"));
+ ]])],
+ [AC_MSG_RESULT([yes])],
+ [
+ AC_MSG_RESULT([no])
+ AC_DEFINE([BROKEN_SNPRINTF], [1],
+ [snprintf does not understand %zu])
+ ],
+ [ AC_MSG_WARN([cross compiling: Assuming working snprintf()]) ]
+ )
+fi
+
+# We depend on vsnprintf returning the right thing on overflow: the
+# number of characters it tried to create (as per SUSv3)
+if test "x$ac_cv_func_vsnprintf" = "xyes" ; then
+ AC_MSG_CHECKING([whether vsnprintf returns correct values on overflow])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+int x_snprintf(char *str, size_t count, const char *fmt, ...)
+{
+ size_t ret;
+ va_list ap;
+
+ va_start(ap, fmt);
+ ret = vsnprintf(str, count, fmt, ap);
+ va_end(ap);
+ return ret;
+}
+ ]], [[
+char x[1];
+if (x_snprintf(x, 1, "%s %d", "hello", 12345) != 11)
+ return 1;
+if (x_snprintf(NULL, 0, "%s %d", "hello", 12345) != 11)
+ return 1;
+return 0;
+ ]])],
+ [AC_MSG_RESULT([yes])],
+ [
+ AC_MSG_RESULT([no])
+ AC_DEFINE([BROKEN_SNPRINTF], [1],
+ [Define if your snprintf is busted])
+ AC_MSG_WARN([****** Your vsnprintf() function is broken, complain to your vendor])
+ ],
+ [ AC_MSG_WARN([cross compiling: Assuming working vsnprintf()]) ]
+ )
+fi
+
+# On systems where [v]snprintf is broken, but is declared in stdio,
+# check that the fmt argument is const char * or just char *.
+# This is only useful for when BROKEN_SNPRINTF
+AC_MSG_CHECKING([whether snprintf can declare const char *fmt])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <stdio.h>
+int snprintf(char *a, size_t b, const char *c, ...) { return 0; }
+ ]], [[
+ snprintf(0, 0, 0);
+ ]])],
+ [AC_MSG_RESULT([yes])
+ AC_DEFINE([SNPRINTF_CONST], [const],
+ [Define as const if snprintf() can declare const char *fmt])],
+ [AC_MSG_RESULT([no])
+ AC_DEFINE([SNPRINTF_CONST], [/* not const */])])
+
+# Check for missing getpeereid (or equiv) support
+NO_PEERCHECK=""
+if test "x$ac_cv_func_getpeereid" != "xyes" -a "x$ac_cv_func_getpeerucred" != "xyes"; then
+ AC_MSG_CHECKING([whether system supports SO_PEERCRED getsockopt])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/socket.h>]], [[int i = SO_PEERCRED;]])],
+ [ AC_MSG_RESULT([yes])
+ AC_DEFINE([HAVE_SO_PEERCRED], [1], [Have PEERCRED socket option])
+ ], [AC_MSG_RESULT([no])
+ NO_PEERCHECK=1
+ ])
+fi
+
+dnl make sure that openpty does not reacquire controlling terminal
+if test ! -z "$check_for_openpty_ctty_bug"; then
+ AC_MSG_CHECKING([if openpty correctly handles controlling tty])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/fcntl.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+ ]], [[
+ pid_t pid;
+ int fd, ptyfd, ttyfd, status;
+
+ pid = fork();
+ if (pid < 0) { /* failed */
+ exit(1);
+ } else if (pid > 0) { /* parent */
+ waitpid(pid, &status, 0);
+ if (WIFEXITED(status))
+ exit(WEXITSTATUS(status));
+ else
+ exit(2);
+ } else { /* child */
+ close(0); close(1); close(2);
+ setsid();
+ openpty(&ptyfd, &ttyfd, NULL, NULL, NULL);
+ fd = open("/dev/tty", O_RDWR | O_NOCTTY);
+ if (fd >= 0)
+ exit(3); /* Acquired ctty: broken */
+ else
+ exit(0); /* Did not acquire ctty: OK */
+ }
+ ]])],
+ [
+ AC_MSG_RESULT([yes])
+ ],
+ [
+ AC_MSG_RESULT([no])
+ AC_DEFINE([SSHD_ACQUIRES_CTTY])
+ ],
+ [
+ AC_MSG_RESULT([cross-compiling, assuming yes])
+ ]
+ )
+fi
+
+if test "x$ac_cv_func_getaddrinfo" = "xyes" && \
+ test "x$check_for_hpux_broken_getaddrinfo" = "x1"; then
+ AC_MSG_CHECKING([if getaddrinfo seems to work])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <errno.h>
+#include <netinet/in.h>
+
+#define TEST_PORT "2222"
+ ]], [[
+ int err, sock;
+ struct addrinfo *gai_ai, *ai, hints;
+ char ntop[NI_MAXHOST], strport[NI_MAXSERV], *name = NULL;
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = AI_PASSIVE;
+
+ err = getaddrinfo(name, TEST_PORT, &hints, &gai_ai);
+ if (err != 0) {
+ fprintf(stderr, "getaddrinfo failed (%s)", gai_strerror(err));
+ exit(1);
+ }
+
+ for (ai = gai_ai; ai != NULL; ai = ai->ai_next) {
+ if (ai->ai_family != AF_INET6)
+ continue;
+
+ err = getnameinfo(ai->ai_addr, ai->ai_addrlen, ntop,
+ sizeof(ntop), strport, sizeof(strport),
+ NI_NUMERICHOST|NI_NUMERICSERV);
+
+ if (err != 0) {
+ if (err == EAI_SYSTEM)
+ perror("getnameinfo EAI_SYSTEM");
+ else
+ fprintf(stderr, "getnameinfo failed: %s\n",
+ gai_strerror(err));
+ exit(2);
+ }
+
+ sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+ if (sock < 0)
+ perror("socket");
+ if (bind(sock, ai->ai_addr, ai->ai_addrlen) < 0) {
+ if (errno == EBADF)
+ exit(3);
+ }
+ }
+ exit(0);
+ ]])],
+ [
+ AC_MSG_RESULT([yes])
+ ],
+ [
+ AC_MSG_RESULT([no])
+ AC_DEFINE([BROKEN_GETADDRINFO])
+ ],
+ [
+ AC_MSG_RESULT([cross-compiling, assuming yes])
+ ]
+ )
+fi
+
+if test "x$ac_cv_func_getaddrinfo" = "xyes" && \
+ test "x$check_for_aix_broken_getaddrinfo" = "x1"; then
+ AC_MSG_CHECKING([if getaddrinfo seems to work])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/socket.h>
+#include <netdb.h>
+#include <errno.h>
+#include <netinet/in.h>
+
+#define TEST_PORT "2222"
+ ]], [[
+ int err, sock;
+ struct addrinfo *gai_ai, *ai, hints;
+ char ntop[NI_MAXHOST], strport[NI_MAXSERV], *name = NULL;
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ hints.ai_flags = AI_PASSIVE;
+
+ err = getaddrinfo(name, TEST_PORT, &hints, &gai_ai);
+ if (err != 0) {
+ fprintf(stderr, "getaddrinfo failed (%s)", gai_strerror(err));
+ exit(1);
+ }
+
+ for (ai = gai_ai; ai != NULL; ai = ai->ai_next) {
+ if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6)
+ continue;
+
+ err = getnameinfo(ai->ai_addr, ai->ai_addrlen, ntop,
+ sizeof(ntop), strport, sizeof(strport),
+ NI_NUMERICHOST|NI_NUMERICSERV);
+
+ if (ai->ai_family == AF_INET && err != 0) {
+ perror("getnameinfo");
+ exit(2);
+ }
+ }
+ exit(0);
+ ]])],
+ [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([AIX_GETNAMEINFO_HACK], [1],
+ [Define if you have a getaddrinfo that fails
+ for the all-zeros IPv6 address])
+ ],
+ [
+ AC_MSG_RESULT([no])
+ AC_DEFINE([BROKEN_GETADDRINFO])
+ ],
+ [
+ AC_MSG_RESULT([cross-compiling, assuming no])
+ ]
+ )
+fi
+
+if test "x$ac_cv_func_getaddrinfo" = "xyes"; then
+ AC_CHECK_DECLS(AI_NUMERICSERV, , ,
+ [#include <sys/types.h>
+ #include <sys/socket.h>
+ #include <netdb.h>])
+fi
+
+if test "x$check_for_conflicting_getspnam" = "x1"; then
+ AC_MSG_CHECKING([for conflicting getspnam in shadow.h])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <shadow.h>
+#include <stdlib.h>
+ ]],
+ [[ exit(0); ]])],
+ [
+ AC_MSG_RESULT([no])
+ ],
+ [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([GETSPNAM_CONFLICTING_DEFS], [1],
+ [Conflicting defs for getspnam])
+ ]
+ )
+fi
+
+dnl NetBSD added an strnvis and unfortunately made it incompatible with the
+dnl existing one in OpenBSD and Linux's libbsd (the former having existed
+dnl for over ten years). Despite this incompatibility being reported during
+dnl development (see http://gnats.netbsd.org/44977) they still shipped it.
+dnl Even more unfortunately FreeBSD and later MacOS picked up this incompatible
+dnl implementation. Try to detect this mess, and assume the only safe option
+dnl if we're cross compiling.
+dnl
+dnl OpenBSD, 2001: strnvis(char *dst, const char *src, size_t dlen, int flag);
+dnl NetBSD: 2012, strnvis(char *dst, size_t dlen, const char *src, int flag);
+if test "x$ac_cv_func_strnvis" = "xyes"; then
+ AC_MSG_CHECKING([for working strnvis])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <signal.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <vis.h>
+static void sighandler(int sig) { _exit(1); }
+ ]], [[
+ char dst[16];
+
+ signal(SIGSEGV, sighandler);
+ if (strnvis(dst, "src", 4, 0) && strcmp(dst, "src") == 0)
+ exit(0);
+ exit(1)
+ ]])],
+ [AC_MSG_RESULT([yes])],
+ [AC_MSG_RESULT([no])
+ AC_DEFINE([BROKEN_STRNVIS], [1], [strnvis detected broken])],
+ [AC_MSG_WARN([cross compiling: assuming broken])
+ AC_DEFINE([BROKEN_STRNVIS], [1], [strnvis assumed broken])]
+ )
+fi
+
+AC_MSG_CHECKING([if SA_RESTARTed signals interrupt select()])
+AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#ifdef HAVE_SYS_SELECT
+# include <sys/select.h>
+#endif
+#include <sys/types.h>
+#include <sys/time.h>
+#include <stdlib.h>
+#include <signal.h>
+#include <unistd.h>
+static void sighandler(int sig) { }
+ ]], [[
+ int r;
+ pid_t pid;
+ struct sigaction sa;
+
+ sa.sa_handler = sighandler;
+ sa.sa_flags = SA_RESTART;
+ (void)sigaction(SIGTERM, &sa, NULL);
+ if ((pid = fork()) == 0) { /* child */
+ pid = getppid();
+ sleep(1);
+ kill(pid, SIGTERM);
+ sleep(1);
+ if (getppid() == pid) /* if parent did not exit, shoot it */
+ kill(pid, SIGKILL);
+ exit(0);
+ } else { /* parent */
+ r = select(0, NULL, NULL, NULL, NULL);
+ }
+ exit(r == -1 ? 0 : 1);
+ ]])],
+ [AC_MSG_RESULT([yes])],
+ [AC_MSG_RESULT([no])
+ AC_DEFINE([NO_SA_RESTART], [1],
+ [SA_RESTARTed signals do no interrupt select])],
+ [AC_MSG_WARN([cross compiling: assuming yes])]
+)
+
+AC_CHECK_FUNCS([getpgrp],[
+ AC_MSG_CHECKING([if getpgrp accepts zero args])
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM([[$ac_includes_default]], [[ getpgrp(); ]])],
+ [ AC_MSG_RESULT([yes])
+ AC_DEFINE([GETPGRP_VOID], [1], [getpgrp takes zero args])],
+ [ AC_MSG_RESULT([no])
+ AC_DEFINE([GETPGRP_VOID], [0], [getpgrp takes one arg])]
+ )
+])
+
+# Search for OpenSSL
+saved_CPPFLAGS="$CPPFLAGS"
+saved_LDFLAGS="$LDFLAGS"
+AC_ARG_WITH([ssl-dir],
+ [ --with-ssl-dir=PATH Specify path to OpenSSL installation ],
+ [
+ if test "x$openssl" = "xno" ; then
+ AC_MSG_ERROR([cannot use --with-ssl-dir when OpenSSL disabled])
+ fi
+ if test "x$withval" != "xno" ; then
+ case "$withval" in
+ # Relative paths
+ ./*|../*) withval="`pwd`/$withval"
+ esac
+ if test -d "$withval/lib"; then
+ if test -n "${rpath_opt}"; then
+ LDFLAGS="-L${withval}/lib ${rpath_opt}${withval}/lib ${LDFLAGS}"
+ else
+ LDFLAGS="-L${withval}/lib ${LDFLAGS}"
+ fi
+ elif test -d "$withval/lib64"; then
+ if test -n "${rpath_opt}"; then
+ LDFLAGS="-L${withval}/lib64 ${rpath_opt}${withval}/lib64 ${LDFLAGS}"
+ else
+ LDFLAGS="-L${withval}/lib64 ${LDFLAGS}"
+ fi
+ else
+ if test -n "${rpath_opt}"; then
+ LDFLAGS="-L${withval} ${rpath_opt}${withval} ${LDFLAGS}"
+ else
+ LDFLAGS="-L${withval} ${LDFLAGS}"
+ fi
+ fi
+ if test -d "$withval/include"; then
+ CPPFLAGS="-I${withval}/include ${CPPFLAGS}"
+ else
+ CPPFLAGS="-I${withval} ${CPPFLAGS}"
+ fi
+ fi
+ ]
+)
+
+AC_ARG_WITH([openssl-header-check],
+ [ --without-openssl-header-check Disable OpenSSL version consistency check],
+ [
+ if test "x$withval" = "xno" ; then
+ openssl_check_nonfatal=1
+ fi
+ ]
+)
+
+openssl_engine=no
+AC_ARG_WITH([ssl-engine],
+ [ --with-ssl-engine Enable OpenSSL (hardware) ENGINE support ],
+ [
+ if test "x$withval" != "xno" ; then
+ if test "x$openssl" = "xno" ; then
+ AC_MSG_ERROR([cannot use --with-ssl-engine when OpenSSL disabled])
+ fi
+ openssl_engine=yes
+ fi
+ ]
+)
+
+if test "x$openssl" = "xyes" ; then
+ LIBS="-lcrypto $LIBS"
+ AC_TRY_LINK_FUNC([RAND_add], ,
+ [AC_MSG_ERROR([*** working libcrypto not found, check config.log])])
+ AC_CHECK_HEADER([openssl/opensslv.h], ,
+ [AC_MSG_ERROR([*** OpenSSL headers missing - please install first or check config.log ***])])
+
+ # Determine OpenSSL header version
+ AC_MSG_CHECKING([OpenSSL header version])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <stdlib.h>
+ #include <stdio.h>
+ #include <string.h>
+ #include <openssl/opensslv.h>
+ #define DATA "conftest.sslincver"
+ ]], [[
+ FILE *fd;
+ int rc;
+
+ fd = fopen(DATA,"w");
+ if(fd == NULL)
+ exit(1);
+
+ if ((rc = fprintf(fd, "%08lx (%s)\n",
+ (unsigned long)OPENSSL_VERSION_NUMBER,
+ OPENSSL_VERSION_TEXT)) < 0)
+ exit(1);
+
+ exit(0);
+ ]])],
+ [
+ ssl_header_ver=`cat conftest.sslincver`
+ AC_MSG_RESULT([$ssl_header_ver])
+ ],
+ [
+ AC_MSG_RESULT([not found])
+ AC_MSG_ERROR([OpenSSL version header not found.])
+ ],
+ [
+ AC_MSG_WARN([cross compiling: not checking])
+ ]
+ )
+
+ # Determining OpenSSL library version is version dependent.
+ AC_CHECK_FUNCS([OpenSSL_version OpenSSL_version_num])
+
+ # Determine OpenSSL library version
+ AC_MSG_CHECKING([OpenSSL library version])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <string.h>
+ #include <openssl/opensslv.h>
+ #include <openssl/crypto.h>
+ #define DATA "conftest.ssllibver"
+ ]], [[
+ FILE *fd;
+ int rc;
+
+ fd = fopen(DATA,"w");
+ if(fd == NULL)
+ exit(1);
+#ifndef OPENSSL_VERSION
+# define OPENSSL_VERSION SSLEAY_VERSION
+#endif
+#ifndef HAVE_OPENSSL_VERSION
+# define OpenSSL_version SSLeay_version
+#endif
+#ifndef HAVE_OPENSSL_VERSION_NUM
+# define OpenSSL_version_num SSLeay
+#endif
+ if ((rc = fprintf(fd, "%08lx (%s)\n",
+ (unsigned long)OpenSSL_version_num(),
+ OpenSSL_version(OPENSSL_VERSION))) < 0)
+ exit(1);
+
+ exit(0);
+ ]])],
+ [
+ ssl_library_ver=`cat conftest.ssllibver`
+ # Check version is supported.
+ case "$ssl_library_ver" in
+ 10000*|0*)
+ AC_MSG_ERROR([OpenSSL >= 1.0.1 required (have "$ssl_library_ver")])
+ ;;
+ 100*) ;; # 1.0.x
+ 101000[[0123456]]*)
+ # https://github.com/openssl/openssl/pull/4613
+ AC_MSG_ERROR([OpenSSL 1.1.x versions prior to 1.1.0g have a bug that breaks their use with OpenSSH (have "$ssl_library_ver")])
+ ;;
+ 101*) ;; # 1.1.x
+ 200*) ;; # LibreSSL
+ 300*) ;; # OpenSSL development branch.
+ *)
+ AC_MSG_ERROR([Unknown/unsupported OpenSSL version ("$ssl_library_ver")])
+ ;;
+ esac
+ AC_MSG_RESULT([$ssl_library_ver])
+ ],
+ [
+ AC_MSG_RESULT([not found])
+ AC_MSG_ERROR([OpenSSL library not found.])
+ ],
+ [
+ AC_MSG_WARN([cross compiling: not checking])
+ ]
+ )
+
+ # Sanity check OpenSSL headers
+ AC_MSG_CHECKING([whether OpenSSL's headers match the library])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <stdlib.h>
+ #include <string.h>
+ #include <openssl/opensslv.h>
+ #include <openssl/crypto.h>
+ ]], [[
+#ifndef HAVE_OPENSSL_VERSION_NUM
+# define OpenSSL_version_num SSLeay
+#endif
+ exit(OpenSSL_version_num() == OPENSSL_VERSION_NUMBER ? 0 : 1);
+ ]])],
+ [
+ AC_MSG_RESULT([yes])
+ ],
+ [
+ AC_MSG_RESULT([no])
+ if test "x$openssl_check_nonfatal" = "x"; then
+ AC_MSG_ERROR([Your OpenSSL headers do not match your
+ library. Check config.log for details.
+ If you are sure your installation is consistent, you can disable the check
+ by running "./configure --without-openssl-header-check".
+ Also see contrib/findssl.sh for help identifying header/library mismatches.
+ ])
+ else
+ AC_MSG_WARN([Your OpenSSL headers do not match your
+ library. Check config.log for details.
+ Also see contrib/findssl.sh for help identifying header/library mismatches.])
+ fi
+ ],
+ [
+ AC_MSG_WARN([cross compiling: not checking])
+ ]
+ )
+
+ AC_MSG_CHECKING([if programs using OpenSSL functions will link])
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([[ #include <openssl/err.h> ]],
+ [[ ERR_load_crypto_strings(); ]])],
+ [
+ AC_MSG_RESULT([yes])
+ ],
+ [
+ AC_MSG_RESULT([no])
+ saved_LIBS="$LIBS"
+ LIBS="$LIBS -ldl"
+ AC_MSG_CHECKING([if programs using OpenSSL need -ldl])
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([[ #include <openssl/err.h> ]],
+ [[ ERR_load_crypto_strings(); ]])],
+ [
+ AC_MSG_RESULT([yes])
+ ],
+ [
+ AC_MSG_RESULT([no])
+ LIBS="$saved_LIBS"
+ ]
+ )
+ ]
+ )
+
+ AC_CHECK_FUNCS([ \
+ BN_is_prime_ex \
+ DSA_generate_parameters_ex \
+ EVP_CIPHER_CTX_ctrl \
+ EVP_DigestFinal_ex \
+ EVP_DigestInit_ex \
+ EVP_MD_CTX_cleanup \
+ EVP_MD_CTX_copy_ex \
+ EVP_MD_CTX_init \
+ HMAC_CTX_init \
+ RSA_generate_key_ex \
+ RSA_get_default_method \
+ ])
+
+ # OpenSSL_add_all_algorithms may be a macro.
+ AC_CHECK_FUNC(OpenSSL_add_all_algorithms,
+ AC_DEFINE(HAVE_OPENSSL_ADD_ALL_ALGORITHMS, 1, [as a function]),
+ AC_CHECK_DECL(OpenSSL_add_all_algorithms,
+ AC_DEFINE(HAVE_OPENSSL_ADD_ALL_ALGORITHMS, 1, [as a macro]), ,
+ [[#include <openssl/evp.h>]]
+ )
+ )
+
+ # LibreSSL/OpenSSL 1.1x API
+ AC_CHECK_FUNCS([ \
+ OPENSSL_init_crypto \
+ DH_get0_key \
+ DH_get0_pqg \
+ DH_set0_key \
+ DH_set_length \
+ DH_set0_pqg \
+ DSA_get0_key \
+ DSA_get0_pqg \
+ DSA_set0_key \
+ DSA_set0_pqg \
+ DSA_SIG_get0 \
+ DSA_SIG_set0 \
+ ECDSA_SIG_get0 \
+ ECDSA_SIG_set0 \
+ EVP_CIPHER_CTX_iv \
+ EVP_CIPHER_CTX_iv_noconst \
+ EVP_CIPHER_CTX_get_iv \
+ EVP_CIPHER_CTX_get_updated_iv \
+ EVP_CIPHER_CTX_set_iv \
+ RSA_get0_crt_params \
+ RSA_get0_factors \
+ RSA_get0_key \
+ RSA_set0_crt_params \
+ RSA_set0_factors \
+ RSA_set0_key \
+ RSA_meth_free \
+ RSA_meth_dup \
+ RSA_meth_set1_name \
+ RSA_meth_get_finish \
+ RSA_meth_set_priv_enc \
+ RSA_meth_set_priv_dec \
+ RSA_meth_set_finish \
+ EVP_PKEY_get0_RSA \
+ EVP_MD_CTX_new \
+ EVP_MD_CTX_free \
+ EVP_chacha20 \
+ ])
+
+ if test "x$openssl_engine" = "xyes" ; then
+ AC_MSG_CHECKING([for OpenSSL ENGINE support])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ #include <openssl/engine.h>
+ ]], [[
+ ENGINE_load_builtin_engines();
+ ENGINE_register_all_complete();
+ ]])],
+ [ AC_MSG_RESULT([yes])
+ AC_DEFINE([USE_OPENSSL_ENGINE], [1],
+ [Enable OpenSSL engine support])
+ ], [ AC_MSG_ERROR([OpenSSL ENGINE support not found])
+ ])
+ fi
+
+ # Check for OpenSSL without EVP_aes_{192,256}_cbc
+ AC_MSG_CHECKING([whether OpenSSL has crippled AES support])
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <stdlib.h>
+ #include <string.h>
+ #include <openssl/evp.h>
+ ]], [[
+ exit(EVP_aes_192_cbc() == NULL || EVP_aes_256_cbc() == NULL);
+ ]])],
+ [
+ AC_MSG_RESULT([no])
+ ],
+ [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([OPENSSL_LOBOTOMISED_AES], [1],
+ [libcrypto is missing AES 192 and 256 bit functions])
+ ]
+ )
+
+ # Check for OpenSSL with EVP_aes_*ctr
+ AC_MSG_CHECKING([whether OpenSSL has AES CTR via EVP])
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <stdlib.h>
+ #include <string.h>
+ #include <openssl/evp.h>
+ ]], [[
+ exit(EVP_aes_128_ctr() == NULL ||
+ EVP_aes_192_cbc() == NULL ||
+ EVP_aes_256_cbc() == NULL);
+ ]])],
+ [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([OPENSSL_HAVE_EVPCTR], [1],
+ [libcrypto has EVP AES CTR])
+ ],
+ [
+ AC_MSG_RESULT([no])
+ ]
+ )
+
+ # Check for OpenSSL with EVP_aes_*gcm
+ AC_MSG_CHECKING([whether OpenSSL has AES GCM via EVP])
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <stdlib.h>
+ #include <string.h>
+ #include <openssl/evp.h>
+ ]], [[
+ exit(EVP_aes_128_gcm() == NULL ||
+ EVP_aes_256_gcm() == NULL ||
+ EVP_CTRL_GCM_SET_IV_FIXED == 0 ||
+ EVP_CTRL_GCM_IV_GEN == 0 ||
+ EVP_CTRL_GCM_SET_TAG == 0 ||
+ EVP_CTRL_GCM_GET_TAG == 0 ||
+ EVP_CIPHER_CTX_ctrl(NULL, 0, 0, NULL) == 0);
+ ]])],
+ [
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([OPENSSL_HAVE_EVPGCM], [1],
+ [libcrypto has EVP AES GCM])
+ ],
+ [
+ AC_MSG_RESULT([no])
+ unsupported_algorithms="$unsupported_cipers \
+ aes128-gcm@openssh.com \
+ aes256-gcm@openssh.com"
+ ]
+ )
+
+ AC_MSG_CHECKING([if EVP_DigestUpdate returns an int])
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <stdlib.h>
+ #include <string.h>
+ #include <openssl/evp.h>
+ ]], [[
+ if(EVP_DigestUpdate(NULL, NULL,0))
+ exit(0);
+ ]])],
+ [
+ AC_MSG_RESULT([yes])
+ ],
+ [
+ AC_MSG_RESULT([no])
+ AC_DEFINE([OPENSSL_EVP_DIGESTUPDATE_VOID], [1],
+ [Define if EVP_DigestUpdate returns void])
+ ]
+ )
+
+ # Some systems want crypt() from libcrypt, *not* the version in OpenSSL,
+ # because the system crypt() is more featureful.
+ if test "x$check_for_libcrypt_before" = "x1"; then
+ AC_CHECK_LIB([crypt], [crypt])
+ fi
+
+ # Some Linux systems (Slackware) need crypt() from libcrypt, *not* the
+ # version in OpenSSL.
+ if test "x$check_for_libcrypt_later" = "x1"; then
+ AC_CHECK_LIB([crypt], [crypt], [LIBS="$LIBS -lcrypt"])
+ fi
+ AC_CHECK_FUNCS([crypt DES_crypt])
+
+ # Check for SHA256, SHA384 and SHA512 support in OpenSSL
+ AC_CHECK_FUNCS([EVP_sha256 EVP_sha384 EVP_sha512])
+
+ # Check complete ECC support in OpenSSL
+ AC_MSG_CHECKING([whether OpenSSL has NID_X9_62_prime256v1])
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <openssl/ec.h>
+ #include <openssl/ecdh.h>
+ #include <openssl/ecdsa.h>
+ #include <openssl/evp.h>
+ #include <openssl/objects.h>
+ #include <openssl/opensslv.h>
+ ]], [[
+ EC_KEY *e = EC_KEY_new_by_curve_name(NID_X9_62_prime256v1);
+ const EVP_MD *m = EVP_sha256(); /* We need this too */
+ ]])],
+ [ AC_MSG_RESULT([yes])
+ enable_nistp256=1 ],
+ [ AC_MSG_RESULT([no]) ]
+ )
+
+ AC_MSG_CHECKING([whether OpenSSL has NID_secp384r1])
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <openssl/ec.h>
+ #include <openssl/ecdh.h>
+ #include <openssl/ecdsa.h>
+ #include <openssl/evp.h>
+ #include <openssl/objects.h>
+ #include <openssl/opensslv.h>
+ ]], [[
+ EC_KEY *e = EC_KEY_new_by_curve_name(NID_secp384r1);
+ const EVP_MD *m = EVP_sha384(); /* We need this too */
+ ]])],
+ [ AC_MSG_RESULT([yes])
+ enable_nistp384=1 ],
+ [ AC_MSG_RESULT([no]) ]
+ )
+
+ AC_MSG_CHECKING([whether OpenSSL has NID_secp521r1])
+ AC_LINK_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <openssl/ec.h>
+ #include <openssl/ecdh.h>
+ #include <openssl/ecdsa.h>
+ #include <openssl/evp.h>
+ #include <openssl/objects.h>
+ #include <openssl/opensslv.h>
+ ]], [[
+ EC_KEY *e = EC_KEY_new_by_curve_name(NID_secp521r1);
+ const EVP_MD *m = EVP_sha512(); /* We need this too */
+ ]])],
+ [ AC_MSG_RESULT([yes])
+ AC_MSG_CHECKING([if OpenSSL's NID_secp521r1 is functional])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <stdlib.h>
+ #include <openssl/ec.h>
+ #include <openssl/ecdh.h>
+ #include <openssl/ecdsa.h>
+ #include <openssl/evp.h>
+ #include <openssl/objects.h>
+ #include <openssl/opensslv.h>
+ ]],[[
+ EC_KEY *e = EC_KEY_new_by_curve_name(NID_secp521r1);
+ const EVP_MD *m = EVP_sha512(); /* We need this too */
+ exit(e == NULL || m == NULL);
+ ]])],
+ [ AC_MSG_RESULT([yes])
+ enable_nistp521=1 ],
+ [ AC_MSG_RESULT([no]) ],
+ [ AC_MSG_WARN([cross-compiling: assuming yes])
+ enable_nistp521=1 ]
+ )],
+ AC_MSG_RESULT([no])
+ )
+
+ COMMENT_OUT_ECC="#no ecc#"
+ TEST_SSH_ECC=no
+
+ if test x$enable_nistp256 = x1 || test x$enable_nistp384 = x1 || \
+ test x$enable_nistp521 = x1; then
+ AC_DEFINE(OPENSSL_HAS_ECC, [1], [OpenSSL has ECC])
+ AC_CHECK_FUNCS([EC_KEY_METHOD_new])
+ openssl_ecc=yes
+ else
+ openssl_ecc=no
+ fi
+ if test x$enable_nistp256 = x1; then
+ AC_DEFINE([OPENSSL_HAS_NISTP256], [1],
+ [libcrypto has NID_X9_62_prime256v1])
+ TEST_SSH_ECC=yes
+ COMMENT_OUT_ECC=""
+ else
+ unsupported_algorithms="$unsupported_algorithms \
+ ecdsa-sha2-nistp256 \
+ ecdh-sha2-nistp256 \
+ ecdsa-sha2-nistp256-cert-v01@openssh.com"
+ fi
+ if test x$enable_nistp384 = x1; then
+ AC_DEFINE([OPENSSL_HAS_NISTP384], [1], [libcrypto has NID_secp384r1])
+ TEST_SSH_ECC=yes
+ COMMENT_OUT_ECC=""
+ else
+ unsupported_algorithms="$unsupported_algorithms \
+ ecdsa-sha2-nistp384 \
+ ecdh-sha2-nistp384 \
+ ecdsa-sha2-nistp384-cert-v01@openssh.com"
+ fi
+ if test x$enable_nistp521 = x1; then
+ AC_DEFINE([OPENSSL_HAS_NISTP521], [1], [libcrypto has NID_secp521r1])
+ TEST_SSH_ECC=yes
+ COMMENT_OUT_ECC=""
+ else
+ unsupported_algorithms="$unsupported_algorithms \
+ ecdh-sha2-nistp521 \
+ ecdsa-sha2-nistp521 \
+ ecdsa-sha2-nistp521-cert-v01@openssh.com"
+ fi
+
+ AC_SUBST([TEST_SSH_ECC])
+ AC_SUBST([COMMENT_OUT_ECC])
+else
+ AC_CHECK_LIB([crypt], [crypt], [LIBS="$LIBS -lcrypt"])
+ AC_CHECK_FUNCS([crypt])
+fi
+
+# PKCS11/U2F depend on OpenSSL and dlopen().
+enable_pkcs11=yes
+enable_sk=yes
+if test "x$openssl" != "xyes" ; then
+ enable_pkcs11="disabled; missing libcrypto"
+ enable_sk="disabled; missing libcrypto"
+fi
+if test "x$openssl_ecc" != "xyes" ; then
+ enable_sk="disabled; OpenSSL has no ECC support"
+fi
+if test "x$ac_cv_func_dlopen" != "xyes" ; then
+ enable_pkcs11="disabled; missing dlopen(3)"
+ enable_sk="disabled; missing dlopen(3)"
+fi
+if test "x$ac_cv_have_decl_RTLD_NOW" != "xyes" ; then
+ enable_pkcs11="disabled; missing RTLD_NOW"
+ enable_sk="disabled; missing RTLD_NOW"
+fi
+if test ! -z "$disable_pkcs11" ; then
+ enable_pkcs11="disabled by user"
+fi
+if test ! -z "$disable_sk" ; then
+ enable_sk="disabled by user"
+fi
+
+AC_MSG_CHECKING([whether to enable PKCS11])
+if test "x$enable_pkcs11" = "xyes" ; then
+ AC_DEFINE([ENABLE_PKCS11], [], [Enable for PKCS#11 support])
+fi
+AC_MSG_RESULT([$enable_pkcs11])
+
+AC_MSG_CHECKING([whether to enable U2F])
+if test "x$enable_sk" = "xyes" ; then
+ AC_DEFINE([ENABLE_SK], [], [Enable for U2F/FIDO support])
+ AC_SUBST(SK_DUMMY_LIBRARY, [regress/misc/sk-dummy/sk-dummy.so])
+else
+ # Do not try to build sk-dummy library.
+ AC_SUBST(SK_DUMMY_LIBRARY, [""])
+fi
+AC_MSG_RESULT([$enable_sk])
+
+# Now check for built-in security key support.
+if test "x$enable_sk" = "xyes" -a "x$enable_sk_internal" = "xyes" ; then
+ AC_PATH_TOOL([PKGCONFIG], [pkg-config], [no])
+ use_pkgconfig_for_libfido2=
+ if test "x$PKGCONFIG" != "xno"; then
+ AC_MSG_CHECKING([if $PKGCONFIG knows about libfido2])
+ if "$PKGCONFIG" libfido2; then
+ AC_MSG_RESULT([yes])
+ use_pkgconfig_for_libfido2=yes
+ else
+ AC_MSG_RESULT([no])
+ fi
+ fi
+ if test "x$use_pkgconfig_for_libfido2" = "xyes"; then
+ LIBFIDO2=`$PKGCONFIG --libs libfido2`
+ CPPFLAGS="$CPPFLAGS `$PKGCONFIG --cflags libfido2`"
+ else
+ LIBFIDO2="-lfido2 -lcbor"
+ fi
+ OTHERLIBS=`echo $LIBFIDO2 | sed 's/-lfido2//'`
+ AC_CHECK_LIB([fido2], [fido_init],
+ [
+ AC_SUBST([LIBFIDO2])
+ AC_DEFINE([ENABLE_SK_INTERNAL], [],
+ [Enable for built-in U2F/FIDO support])
+ enable_sk="built-in"
+ ], [ AC_MSG_ERROR([no usable libfido2 found]) ],
+ [ $OTHERLIBS ]
+ )
+ saved_LIBS="$LIBS"
+ LIBS="$LIBS $LIBFIDO2"
+ AC_CHECK_FUNCS([ \
+ fido_cred_prot \
+ fido_cred_set_prot \
+ fido_dev_get_touch_begin \
+ fido_dev_get_touch_status \
+ fido_dev_supports_cred_prot \
+ ])
+ LIBS="$saved_LIBS"
+ AC_CHECK_HEADER([fido.h], [],
+ AC_MSG_ERROR([missing fido.h from libfido2]))
+ AC_CHECK_HEADER([fido/credman.h], [],
+ AC_MSG_ERROR([missing fido/credman.h from libfido2]),
+ [#include <fido.h>]
+ )
+fi
+
+AC_CHECK_FUNCS([ \
+ arc4random \
+ arc4random_buf \
+ arc4random_stir \
+ arc4random_uniform \
+])
+
+saved_LIBS="$LIBS"
+AC_CHECK_LIB([iaf], [ia_openinfo], [
+ LIBS="$LIBS -liaf"
+ AC_CHECK_FUNCS([set_id], [SSHDLIBS="$SSHDLIBS -liaf"
+ AC_DEFINE([HAVE_LIBIAF], [1],
+ [Define if system has libiaf that supports set_id])
+ ])
+])
+LIBS="$saved_LIBS"
+
+### Configure cryptographic random number support
+
+# Check whether OpenSSL seeds itself
+if test "x$openssl" = "xyes" ; then
+ AC_MSG_CHECKING([whether OpenSSL's PRNG is internally seeded])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+ #include <stdlib.h>
+ #include <string.h>
+ #include <openssl/rand.h>
+ ]], [[
+ exit(RAND_status() == 1 ? 0 : 1);
+ ]])],
+ [
+ OPENSSL_SEEDS_ITSELF=yes
+ AC_MSG_RESULT([yes])
+ ],
+ [
+ AC_MSG_RESULT([no])
+ ],
+ [
+ AC_MSG_WARN([cross compiling: assuming yes])
+ # This is safe, since we will fatal() at runtime if
+ # OpenSSL is not seeded correctly.
+ OPENSSL_SEEDS_ITSELF=yes
+ ]
+ )
+fi
+
+# PRNGD TCP socket
+AC_ARG_WITH([prngd-port],
+ [ --with-prngd-port=PORT read entropy from PRNGD/EGD TCP localhost:PORT],
+ [
+ case "$withval" in
+ no)
+ withval=""
+ ;;
+ [[0-9]]*)
+ ;;
+ *)
+ AC_MSG_ERROR([You must specify a numeric port number for --with-prngd-port])
+ ;;
+ esac
+ if test ! -z "$withval" ; then
+ PRNGD_PORT="$withval"
+ AC_DEFINE_UNQUOTED([PRNGD_PORT], [$PRNGD_PORT],
+ [Port number of PRNGD/EGD random number socket])
+ fi
+ ]
+)
+
+# PRNGD Unix domain socket
+AC_ARG_WITH([prngd-socket],
+ [ --with-prngd-socket=FILE read entropy from PRNGD/EGD socket FILE (default=/var/run/egd-pool)],
+ [
+ case "$withval" in
+ yes)
+ withval="/var/run/egd-pool"
+ ;;
+ no)
+ withval=""
+ ;;
+ /*)
+ ;;
+ *)
+ AC_MSG_ERROR([You must specify an absolute path to the entropy socket])
+ ;;
+ esac
+
+ if test ! -z "$withval" ; then
+ if test ! -z "$PRNGD_PORT" ; then
+ AC_MSG_ERROR([You may not specify both a PRNGD/EGD port and socket])
+ fi
+ if test ! -r "$withval" ; then
+ AC_MSG_WARN([Entropy socket is not readable])
+ fi
+ PRNGD_SOCKET="$withval"
+ AC_DEFINE_UNQUOTED([PRNGD_SOCKET], ["$PRNGD_SOCKET"],
+ [Location of PRNGD/EGD random number socket])
+ fi
+ ],
+ [
+ # Check for existing socket only if we don't have a random device already
+ if test "x$OPENSSL_SEEDS_ITSELF" != "xyes" ; then
+ AC_MSG_CHECKING([for PRNGD/EGD socket])
+ # Insert other locations here
+ for sock in /var/run/egd-pool /dev/egd-pool /etc/entropy; do
+ if test -r $sock && $TEST_MINUS_S_SH -c "test -S $sock -o -p $sock" ; then
+ PRNGD_SOCKET="$sock"
+ AC_DEFINE_UNQUOTED([PRNGD_SOCKET], ["$PRNGD_SOCKET"])
+ break;
+ fi
+ done
+ if test ! -z "$PRNGD_SOCKET" ; then
+ AC_MSG_RESULT([$PRNGD_SOCKET])
+ else
+ AC_MSG_RESULT([not found])
+ fi
+ fi
+ ]
+)
+
+# Which randomness source do we use?
+if test ! -z "$PRNGD_PORT" ; then
+ RAND_MSG="PRNGd port $PRNGD_PORT"
+elif test ! -z "$PRNGD_SOCKET" ; then
+ RAND_MSG="PRNGd socket $PRNGD_SOCKET"
+elif test ! -z "$OPENSSL_SEEDS_ITSELF" ; then
+ AC_DEFINE([OPENSSL_PRNG_ONLY], [1],
+ [Define if you want the OpenSSL internally seeded PRNG only])
+ RAND_MSG="OpenSSL internal ONLY"
+elif test "x$openssl" = "xno" ; then
+ AC_MSG_WARN([OpenSSH will use /dev/urandom as a source of random numbers. It will fail if this device is not supported or accessible])
+else
+ AC_MSG_ERROR([OpenSSH has no source of random numbers. Please configure OpenSSL with an entropy source or re-run configure using one of the --with-prngd-port or --with-prngd-socket options])
+fi
+
+# Check for PAM libs
+PAM_MSG="no"
+AC_ARG_WITH([pam],
+ [ --with-pam Enable PAM support ],
+ [
+ if test "x$withval" != "xno" ; then
+ if test "x$ac_cv_header_security_pam_appl_h" != "xyes" && \
+ test "x$ac_cv_header_pam_pam_appl_h" != "xyes" ; then
+ AC_MSG_ERROR([PAM headers not found])
+ fi
+
+ saved_LIBS="$LIBS"
+ AC_CHECK_LIB([dl], [dlopen], , )
+ AC_CHECK_LIB([pam], [pam_set_item], , [AC_MSG_ERROR([*** libpam missing])])
+ AC_CHECK_FUNCS([pam_getenvlist])
+ AC_CHECK_FUNCS([pam_putenv])
+ LIBS="$saved_LIBS"
+
+ PAM_MSG="yes"
+
+ SSHDLIBS="$SSHDLIBS -lpam"
+ AC_DEFINE([USE_PAM], [1],
+ [Define if you want to enable PAM support])
+
+ if test $ac_cv_lib_dl_dlopen = yes; then
+ case "$LIBS" in
+ *-ldl*)
+ # libdl already in LIBS
+ ;;
+ *)
+ SSHDLIBS="$SSHDLIBS -ldl"
+ ;;
+ esac
+ fi
+ fi
+ ]
+)
+
+AC_ARG_WITH([pam-service],
+ [ --with-pam-service=name Specify PAM service name ],
+ [
+ if test "x$withval" != "xno" && \
+ test "x$withval" != "xyes" ; then
+ AC_DEFINE_UNQUOTED([SSHD_PAM_SERVICE],
+ ["$withval"], [sshd PAM service name])
+ fi
+ ]
+)
+
+# Check for older PAM
+if test "x$PAM_MSG" = "xyes" ; then
+ # Check PAM strerror arguments (old PAM)
+ AC_MSG_CHECKING([whether pam_strerror takes only one argument])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <stdlib.h>
+#if defined(HAVE_SECURITY_PAM_APPL_H)
+#include <security/pam_appl.h>
+#elif defined (HAVE_PAM_PAM_APPL_H)
+#include <pam/pam_appl.h>
+#endif
+ ]], [[
+(void)pam_strerror((pam_handle_t *)NULL, -1);
+ ]])], [AC_MSG_RESULT([no])], [
+ AC_DEFINE([HAVE_OLD_PAM], [1],
+ [Define if you have an old version of PAM
+ which takes only one argument to pam_strerror])
+ AC_MSG_RESULT([yes])
+ PAM_MSG="yes (old library)"
+
+ ])
+fi
+
+case "$host" in
+*-*-cygwin*)
+ SSH_PRIVSEP_USER=CYGWIN_SSH_PRIVSEP_USER
+ ;;
+*)
+ SSH_PRIVSEP_USER=sshd
+ ;;
+esac
+AC_ARG_WITH([privsep-user],
+ [ --with-privsep-user=user Specify non-privileged user for privilege separation],
+ [
+ if test -n "$withval" && test "x$withval" != "xno" && \
+ test "x${withval}" != "xyes"; then
+ SSH_PRIVSEP_USER=$withval
+ fi
+ ]
+)
+if test "x$SSH_PRIVSEP_USER" = "xCYGWIN_SSH_PRIVSEP_USER" ; then
+ AC_DEFINE_UNQUOTED([SSH_PRIVSEP_USER], [CYGWIN_SSH_PRIVSEP_USER],
+ [Cygwin function to fetch non-privileged user for privilege separation])
+else
+ AC_DEFINE_UNQUOTED([SSH_PRIVSEP_USER], ["$SSH_PRIVSEP_USER"],
+ [non-privileged user for privilege separation])
+fi
+AC_SUBST([SSH_PRIVSEP_USER])
+
+if test "x$have_linux_no_new_privs" = "x1" ; then
+AC_CHECK_DECL([SECCOMP_MODE_FILTER], [have_seccomp_filter=1], , [
+ #include <sys/types.h>
+ #include <linux/seccomp.h>
+])
+fi
+if test "x$have_seccomp_filter" = "x1" ; then
+AC_MSG_CHECKING([kernel for seccomp_filter support])
+AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+ #include <errno.h>
+ #include <elf.h>
+ #include <linux/audit.h>
+ #include <linux/seccomp.h>
+ #include <stdlib.h>
+ #include <sys/prctl.h>
+ ]],
+ [[ int i = $seccomp_audit_arch;
+ errno = 0;
+ prctl(PR_SET_SECCOMP, SECCOMP_MODE_FILTER, NULL, 0, 0);
+ exit(errno == EFAULT ? 0 : 1); ]])],
+ [ AC_MSG_RESULT([yes]) ], [
+ AC_MSG_RESULT([no])
+ # Disable seccomp filter as a target
+ have_seccomp_filter=0
+ ]
+)
+fi
+
+# Decide which sandbox style to use
+sandbox_arg=""
+AC_ARG_WITH([sandbox],
+ [ --with-sandbox=style Specify privilege separation sandbox (no, capsicum, darwin, rlimit, seccomp_filter, systrace, pledge)],
+ [
+ if test "x$withval" = "xyes" ; then
+ sandbox_arg=""
+ else
+ sandbox_arg="$withval"
+ fi
+ ]
+)
+
+# Some platforms (seems to be the ones that have a kernel poll(2)-type
+# function with which they implement select(2)) use an extra file descriptor
+# when calling select(2), which means we can't use the rlimit sandbox.
+AC_MSG_CHECKING([if select works with descriptor rlimit])
+AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#include <sys/resource.h>
+#ifdef HAVE_SYS_SELECT_H
+# include <sys/select.h>
+#endif
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+ ]],[[
+ struct rlimit rl_zero;
+ int fd, r;
+ fd_set fds;
+ struct timeval tv;
+
+ fd = open("/dev/null", O_RDONLY);
+ FD_ZERO(&fds);
+ FD_SET(fd, &fds);
+ rl_zero.rlim_cur = rl_zero.rlim_max = 0;
+ setrlimit(RLIMIT_FSIZE, &rl_zero);
+ setrlimit(RLIMIT_NOFILE, &rl_zero);
+ tv.tv_sec = 1;
+ tv.tv_usec = 0;
+ r = select(fd+1, &fds, NULL, NULL, &tv);
+ exit (r == -1 ? 1 : 0);
+ ]])],
+ [AC_MSG_RESULT([yes])
+ select_works_with_rlimit=yes],
+ [AC_MSG_RESULT([no])
+ select_works_with_rlimit=no],
+ [AC_MSG_WARN([cross compiling: assuming yes])
+ select_works_with_rlimit=yes]
+)
+
+AC_MSG_CHECKING([if setrlimit(RLIMIT_NOFILE,{0,0}) works])
+AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#include <sys/resource.h>
+#include <errno.h>
+#include <stdlib.h>
+ ]],[[
+ struct rlimit rl_zero;
+ int r;
+
+ rl_zero.rlim_cur = rl_zero.rlim_max = 0;
+ r = setrlimit(RLIMIT_NOFILE, &rl_zero);
+ exit (r == -1 ? 1 : 0);
+ ]])],
+ [AC_MSG_RESULT([yes])
+ rlimit_nofile_zero_works=yes],
+ [AC_MSG_RESULT([no])
+ rlimit_nofile_zero_works=no],
+ [AC_MSG_WARN([cross compiling: assuming yes])
+ rlimit_nofile_zero_works=yes]
+)
+
+AC_MSG_CHECKING([if setrlimit RLIMIT_FSIZE works])
+AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/resource.h>
+#include <stdlib.h>
+ ]],[[
+ struct rlimit rl_zero;
+
+ rl_zero.rlim_cur = rl_zero.rlim_max = 0;
+ exit(setrlimit(RLIMIT_FSIZE, &rl_zero) != 0);
+ ]])],
+ [AC_MSG_RESULT([yes])],
+ [AC_MSG_RESULT([no])
+ AC_DEFINE(SANDBOX_SKIP_RLIMIT_FSIZE, 1,
+ [setrlimit RLIMIT_FSIZE works])],
+ [AC_MSG_WARN([cross compiling: assuming yes])]
+)
+
+if test "x$sandbox_arg" = "xpledge" || \
+ ( test -z "$sandbox_arg" && test "x$ac_cv_func_pledge" = "xyes" ) ; then
+ test "x$ac_cv_func_pledge" != "xyes" && \
+ AC_MSG_ERROR([pledge sandbox requires pledge(2) support])
+ SANDBOX_STYLE="pledge"
+ AC_DEFINE([SANDBOX_PLEDGE], [1], [Sandbox using pledge(2)])
+elif test "x$sandbox_arg" = "xsystrace" || \
+ ( test -z "$sandbox_arg" && test "x$have_systr_policy_kill" = "x1" ) ; then
+ test "x$have_systr_policy_kill" != "x1" && \
+ AC_MSG_ERROR([systrace sandbox requires systrace headers and SYSTR_POLICY_KILL support])
+ SANDBOX_STYLE="systrace"
+ AC_DEFINE([SANDBOX_SYSTRACE], [1], [Sandbox using systrace(4)])
+elif test "x$sandbox_arg" = "xdarwin" || \
+ ( test -z "$sandbox_arg" && test "x$ac_cv_func_sandbox_init" = "xyes" && \
+ test "x$ac_cv_header_sandbox_h" = "xyes") ; then
+ test "x$ac_cv_func_sandbox_init" != "xyes" -o \
+ "x$ac_cv_header_sandbox_h" != "xyes" && \
+ AC_MSG_ERROR([Darwin seatbelt sandbox requires sandbox.h and sandbox_init function])
+ SANDBOX_STYLE="darwin"
+ AC_DEFINE([SANDBOX_DARWIN], [1], [Sandbox using Darwin sandbox_init(3)])
+elif test "x$sandbox_arg" = "xseccomp_filter" || \
+ ( test -z "$sandbox_arg" && \
+ test "x$have_seccomp_filter" = "x1" && \
+ test "x$ac_cv_header_elf_h" = "xyes" && \
+ test "x$ac_cv_header_linux_audit_h" = "xyes" && \
+ test "x$ac_cv_header_linux_filter_h" = "xyes" && \
+ test "x$seccomp_audit_arch" != "x" && \
+ test "x$have_linux_no_new_privs" = "x1" && \
+ test "x$ac_cv_func_prctl" = "xyes" ) ; then
+ test "x$seccomp_audit_arch" = "x" && \
+ AC_MSG_ERROR([seccomp_filter sandbox not supported on $host])
+ test "x$have_linux_no_new_privs" != "x1" && \
+ AC_MSG_ERROR([seccomp_filter sandbox requires PR_SET_NO_NEW_PRIVS])
+ test "x$have_seccomp_filter" != "x1" && \
+ AC_MSG_ERROR([seccomp_filter sandbox requires seccomp headers])
+ test "x$ac_cv_func_prctl" != "xyes" && \
+ AC_MSG_ERROR([seccomp_filter sandbox requires prctl function])
+ SANDBOX_STYLE="seccomp_filter"
+ AC_DEFINE([SANDBOX_SECCOMP_FILTER], [1], [Sandbox using seccomp filter])
+elif test "x$sandbox_arg" = "xcapsicum" || \
+ ( test -z "$sandbox_arg" && \
+ test "x$ac_cv_header_sys_capsicum_h" = "xyes" && \
+ test "x$ac_cv_func_cap_rights_limit" = "xyes") ; then
+ test "x$ac_cv_header_sys_capsicum_h" != "xyes" && \
+ AC_MSG_ERROR([capsicum sandbox requires sys/capsicum.h header])
+ test "x$ac_cv_func_cap_rights_limit" != "xyes" && \
+ AC_MSG_ERROR([capsicum sandbox requires cap_rights_limit function])
+ SANDBOX_STYLE="capsicum"
+ AC_DEFINE([SANDBOX_CAPSICUM], [1], [Sandbox using capsicum])
+elif test "x$sandbox_arg" = "xrlimit" || \
+ ( test -z "$sandbox_arg" && test "x$ac_cv_func_setrlimit" = "xyes" && \
+ test "x$select_works_with_rlimit" = "xyes" && \
+ test "x$rlimit_nofile_zero_works" = "xyes" ) ; then
+ test "x$ac_cv_func_setrlimit" != "xyes" && \
+ AC_MSG_ERROR([rlimit sandbox requires setrlimit function])
+ test "x$select_works_with_rlimit" != "xyes" && \
+ AC_MSG_ERROR([rlimit sandbox requires select to work with rlimit])
+ SANDBOX_STYLE="rlimit"
+ AC_DEFINE([SANDBOX_RLIMIT], [1], [Sandbox using setrlimit(2)])
+elif test "x$sandbox_arg" = "xsolaris" || \
+ ( test -z "$sandbox_arg" && test "x$SOLARIS_PRIVS" = "xyes" ) ; then
+ SANDBOX_STYLE="solaris"
+ AC_DEFINE([SANDBOX_SOLARIS], [1], [Sandbox using Solaris/Illumos privileges])
+elif test -z "$sandbox_arg" || test "x$sandbox_arg" = "xno" || \
+ test "x$sandbox_arg" = "xnone" || test "x$sandbox_arg" = "xnull" ; then
+ SANDBOX_STYLE="none"
+ AC_DEFINE([SANDBOX_NULL], [1], [no privsep sandboxing])
+else
+ AC_MSG_ERROR([unsupported --with-sandbox])
+fi
+
+# Cheap hack to ensure NEWS-OS libraries are arranged right.
+if test ! -z "$SONY" ; then
+ LIBS="$LIBS -liberty";
+fi
+
+# Check for long long datatypes
+AC_CHECK_TYPES([long long, unsigned long long, long double])
+
+# Check datatype sizes
+AC_CHECK_SIZEOF([short int])
+AC_CHECK_SIZEOF([int])
+AC_CHECK_SIZEOF([long int])
+AC_CHECK_SIZEOF([long long int])
+
+# Sanity check long long for some platforms (AIX)
+if test "x$ac_cv_sizeof_long_long_int" = "x4" ; then
+ ac_cv_sizeof_long_long_int=0
+fi
+
+# compute LLONG_MIN and LLONG_MAX if we don't know them.
+if test -z "$have_llong_max" && test -z "$have_long_long_max"; then
+ AC_MSG_CHECKING([for max value of long long])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <stdio.h>
+#include <stdlib.h>
+/* Why is this so damn hard? */
+#ifdef __GNUC__
+# undef __GNUC__
+#endif
+#define __USE_ISOC99
+#include <limits.h>
+#define DATA "conftest.llminmax"
+#define my_abs(a) ((a) < 0 ? ((a) * -1) : (a))
+
+/*
+ * printf in libc on some platforms (eg old Tru64) does not understand %lld so
+ * we do this the hard way.
+ */
+static int
+fprint_ll(FILE *f, long long n)
+{
+ unsigned int i;
+ int l[sizeof(long long) * 8];
+
+ if (n < 0)
+ if (fprintf(f, "-") < 0)
+ return -1;
+ for (i = 0; n != 0; i++) {
+ l[i] = my_abs(n % 10);
+ n /= 10;
+ }
+ do {
+ if (fprintf(f, "%d", l[--i]) < 0)
+ return -1;
+ } while (i != 0);
+ if (fprintf(f, " ") < 0)
+ return -1;
+ return 0;
+}
+ ]], [[
+ FILE *f;
+ long long i, llmin, llmax = 0;
+
+ if((f = fopen(DATA,"w")) == NULL)
+ exit(1);
+
+#if defined(LLONG_MIN) && defined(LLONG_MAX)
+ fprintf(stderr, "Using system header for LLONG_MIN and LLONG_MAX\n");
+ llmin = LLONG_MIN;
+ llmax = LLONG_MAX;
+#else
+ fprintf(stderr, "Calculating LLONG_MIN and LLONG_MAX\n");
+ /* This will work on one's complement and two's complement */
+ for (i = 1; i > llmax; i <<= 1, i++)
+ llmax = i;
+ llmin = llmax + 1LL; /* wrap */
+#endif
+
+ /* Sanity check */
+ if (llmin + 1 < llmin || llmin - 1 < llmin || llmax + 1 > llmax
+ || llmax - 1 > llmax || llmin == llmax || llmin == 0
+ || llmax == 0 || llmax < LONG_MAX || llmin > LONG_MIN) {
+ fprintf(f, "unknown unknown\n");
+ exit(2);
+ }
+
+ if (fprint_ll(f, llmin) < 0)
+ exit(3);
+ if (fprint_ll(f, llmax) < 0)
+ exit(4);
+ if (fclose(f) < 0)
+ exit(5);
+ exit(0);
+ ]])],
+ [
+ llong_min=`$AWK '{print $1}' conftest.llminmax`
+ llong_max=`$AWK '{print $2}' conftest.llminmax`
+
+ AC_MSG_RESULT([$llong_max])
+ AC_DEFINE_UNQUOTED([LLONG_MAX], [${llong_max}LL],
+ [max value of long long calculated by configure])
+ AC_MSG_CHECKING([for min value of long long])
+ AC_MSG_RESULT([$llong_min])
+ AC_DEFINE_UNQUOTED([LLONG_MIN], [${llong_min}LL],
+ [min value of long long calculated by configure])
+ ],
+ [
+ AC_MSG_RESULT([not found])
+ ],
+ [
+ AC_MSG_WARN([cross compiling: not checking])
+ ]
+ )
+fi
+
+AC_CHECK_DECLS([UINT32_MAX], , , [[
+#ifdef HAVE_SYS_LIMITS_H
+# include <sys/limits.h>
+#endif
+#ifdef HAVE_LIMITS_H
+# include <limits.h>
+#endif
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+]])
+
+# More checks for data types
+AC_CACHE_CHECK([for u_int type], ac_cv_have_u_int, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
+ [[ u_int a; a = 1;]])],
+ [ ac_cv_have_u_int="yes" ], [ ac_cv_have_u_int="no"
+ ])
+])
+if test "x$ac_cv_have_u_int" = "xyes" ; then
+ AC_DEFINE([HAVE_U_INT], [1], [define if you have u_int data type])
+ have_u_int=1
+fi
+
+AC_CACHE_CHECK([for intXX_t types], ac_cv_have_intxx_t, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
+ [[ int8_t a; int16_t b; int32_t c; a = b = c = 1;]])],
+ [ ac_cv_have_intxx_t="yes" ], [ ac_cv_have_intxx_t="no"
+ ])
+])
+if test "x$ac_cv_have_intxx_t" = "xyes" ; then
+ AC_DEFINE([HAVE_INTXX_T], [1], [define if you have intxx_t data type])
+ have_intxx_t=1
+fi
+
+if (test -z "$have_intxx_t" && \
+ test "x$ac_cv_header_stdint_h" = "xyes")
+then
+ AC_MSG_CHECKING([for intXX_t types in stdint.h])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <stdint.h> ]],
+ [[ int8_t a; int16_t b; int32_t c; a = b = c = 1;]])],
+ [
+ AC_DEFINE([HAVE_INTXX_T])
+ AC_MSG_RESULT([yes])
+ ], [ AC_MSG_RESULT([no])
+ ])
+fi
+
+AC_CACHE_CHECK([for int64_t type], ac_cv_have_int64_t, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+#include <sys/socket.h>
+#ifdef HAVE_SYS_BITYPES_H
+# include <sys/bitypes.h>
+#endif
+ ]], [[
+int64_t a; a = 1;
+ ]])],
+ [ ac_cv_have_int64_t="yes" ], [ ac_cv_have_int64_t="no"
+ ])
+])
+if test "x$ac_cv_have_int64_t" = "xyes" ; then
+ AC_DEFINE([HAVE_INT64_T], [1], [define if you have int64_t data type])
+fi
+
+AC_CACHE_CHECK([for u_intXX_t types], ac_cv_have_u_intxx_t, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
+ [[ u_int8_t a; u_int16_t b; u_int32_t c; a = b = c = 1;]])],
+ [ ac_cv_have_u_intxx_t="yes" ], [ ac_cv_have_u_intxx_t="no"
+ ])
+])
+if test "x$ac_cv_have_u_intxx_t" = "xyes" ; then
+ AC_DEFINE([HAVE_U_INTXX_T], [1], [define if you have u_intxx_t data type])
+ have_u_intxx_t=1
+fi
+
+if test -z "$have_u_intxx_t" ; then
+ AC_MSG_CHECKING([for u_intXX_t types in sys/socket.h])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/socket.h> ]],
+ [[ u_int8_t a; u_int16_t b; u_int32_t c; a = b = c = 1;]])],
+ [
+ AC_DEFINE([HAVE_U_INTXX_T])
+ AC_MSG_RESULT([yes])
+ ], [ AC_MSG_RESULT([no])
+ ])
+fi
+
+AC_CACHE_CHECK([for u_int64_t types], ac_cv_have_u_int64_t, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
+ [[ u_int64_t a; a = 1;]])],
+ [ ac_cv_have_u_int64_t="yes" ], [ ac_cv_have_u_int64_t="no"
+ ])
+])
+if test "x$ac_cv_have_u_int64_t" = "xyes" ; then
+ AC_DEFINE([HAVE_U_INT64_T], [1], [define if you have u_int64_t data type])
+ have_u_int64_t=1
+fi
+
+if (test -z "$have_u_int64_t" && \
+ test "x$ac_cv_header_sys_bitypes_h" = "xyes")
+then
+ AC_MSG_CHECKING([for u_int64_t type in sys/bitypes.h])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/bitypes.h> ]],
+ [[ u_int64_t a; a = 1]])],
+ [
+ AC_DEFINE([HAVE_U_INT64_T])
+ AC_MSG_RESULT([yes])
+ ], [ AC_MSG_RESULT([no])
+ ])
+fi
+
+if test -z "$have_u_intxx_t" ; then
+ AC_CACHE_CHECK([for uintXX_t types], ac_cv_have_uintxx_t, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+ ]], [[
+ uint8_t a;
+ uint16_t b;
+ uint32_t c;
+ a = b = c = 1;
+ ]])],
+ [ ac_cv_have_uintxx_t="yes" ], [ ac_cv_have_uintxx_t="no"
+ ])
+ ])
+ if test "x$ac_cv_have_uintxx_t" = "xyes" ; then
+ AC_DEFINE([HAVE_UINTXX_T], [1],
+ [define if you have uintxx_t data type])
+ fi
+fi
+
+if (test -z "$have_uintxx_t" && \
+ test "x$ac_cv_header_stdint_h" = "xyes")
+then
+ AC_MSG_CHECKING([for uintXX_t types in stdint.h])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <stdint.h> ]],
+ [[ uint8_t a; uint16_t b; uint32_t c; a = b = c = 1;]])],
+ [
+ AC_DEFINE([HAVE_UINTXX_T])
+ AC_MSG_RESULT([yes])
+ ], [ AC_MSG_RESULT([no])
+ ])
+fi
+
+if (test -z "$have_uintxx_t" && \
+ test "x$ac_cv_header_inttypes_h" = "xyes")
+then
+ AC_MSG_CHECKING([for uintXX_t types in inttypes.h])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <inttypes.h> ]],
+ [[ uint8_t a; uint16_t b; uint32_t c; a = b = c = 1;]])],
+ [
+ AC_DEFINE([HAVE_UINTXX_T])
+ AC_MSG_RESULT([yes])
+ ], [ AC_MSG_RESULT([no])
+ ])
+fi
+
+if (test -z "$have_u_intxx_t" || test -z "$have_intxx_t" && \
+ test "x$ac_cv_header_sys_bitypes_h" = "xyes")
+then
+ AC_MSG_CHECKING([for intXX_t and u_intXX_t types in sys/bitypes.h])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/bitypes.h>
+ ]], [[
+ int8_t a; int16_t b; int32_t c;
+ u_int8_t e; u_int16_t f; u_int32_t g;
+ a = b = c = e = f = g = 1;
+ ]])],
+ [
+ AC_DEFINE([HAVE_U_INTXX_T])
+ AC_DEFINE([HAVE_INTXX_T])
+ AC_MSG_RESULT([yes])
+ ], [AC_MSG_RESULT([no])
+ ])
+fi
+
+
+AC_CACHE_CHECK([for u_char], ac_cv_have_u_char, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
+ [[ u_char foo; foo = 125; ]])],
+ [ ac_cv_have_u_char="yes" ], [ ac_cv_have_u_char="no"
+ ])
+])
+if test "x$ac_cv_have_u_char" = "xyes" ; then
+ AC_DEFINE([HAVE_U_CHAR], [1], [define if you have u_char data type])
+fi
+
+AC_CHECK_TYPES([intmax_t, uintmax_t], , , [
+#include <sys/types.h>
+#ifdef HAVE_STDINT_H
+# include <stdint.h>
+#endif
+])
+
+TYPE_SOCKLEN_T
+
+AC_CHECK_TYPES([sig_atomic_t], , , [#include <signal.h>])
+AC_CHECK_TYPES([fsblkcnt_t, fsfilcnt_t], , , [
+#include <sys/types.h>
+#ifdef HAVE_SYS_BITYPES_H
+#include <sys/bitypes.h>
+#endif
+#ifdef HAVE_SYS_STATFS_H
+#include <sys/statfs.h>
+#endif
+#ifdef HAVE_SYS_STATVFS_H
+#include <sys/statvfs.h>
+#endif
+])
+
+AC_CHECK_MEMBERS([struct statfs.f_files, struct statfs.f_flags], [], [], [[
+#include <sys/param.h>
+#include <sys/types.h>
+#ifdef HAVE_SYS_BITYPES_H
+#include <sys/bitypes.h>
+#endif
+#ifdef HAVE_SYS_STATFS_H
+#include <sys/statfs.h>
+#endif
+#ifdef HAVE_SYS_STATVFS_H
+#include <sys/statvfs.h>
+#endif
+#ifdef HAVE_SYS_VFS_H
+#include <sys/vfs.h>
+#endif
+#ifdef HAVE_SYS_MOUNT_H
+#include <sys/mount.h>
+#endif
+]])
+
+
+AC_CHECK_TYPES([in_addr_t, in_port_t], , ,
+[#include <sys/types.h>
+#include <netinet/in.h>])
+
+AC_CACHE_CHECK([for size_t], ac_cv_have_size_t, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
+ [[ size_t foo; foo = 1235; ]])],
+ [ ac_cv_have_size_t="yes" ], [ ac_cv_have_size_t="no"
+ ])
+])
+if test "x$ac_cv_have_size_t" = "xyes" ; then
+ AC_DEFINE([HAVE_SIZE_T], [1], [define if you have size_t data type])
+fi
+
+AC_CACHE_CHECK([for ssize_t], ac_cv_have_ssize_t, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
+ [[ ssize_t foo; foo = 1235; ]])],
+ [ ac_cv_have_ssize_t="yes" ], [ ac_cv_have_ssize_t="no"
+ ])
+])
+if test "x$ac_cv_have_ssize_t" = "xyes" ; then
+ AC_DEFINE([HAVE_SSIZE_T], [1], [define if you have ssize_t data type])
+fi
+
+AC_CACHE_CHECK([for clock_t], ac_cv_have_clock_t, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <time.h> ]],
+ [[ clock_t foo; foo = 1235; ]])],
+ [ ac_cv_have_clock_t="yes" ], [ ac_cv_have_clock_t="no"
+ ])
+])
+if test "x$ac_cv_have_clock_t" = "xyes" ; then
+ AC_DEFINE([HAVE_CLOCK_T], [1], [define if you have clock_t data type])
+fi
+
+AC_CACHE_CHECK([for sa_family_t], ac_cv_have_sa_family_t, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/socket.h>
+ ]], [[ sa_family_t foo; foo = 1235; ]])],
+ [ ac_cv_have_sa_family_t="yes" ],
+ [ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+ ]], [[ sa_family_t foo; foo = 1235; ]])],
+ [ ac_cv_have_sa_family_t="yes" ],
+ [ ac_cv_have_sa_family_t="no" ]
+ )
+ ])
+])
+if test "x$ac_cv_have_sa_family_t" = "xyes" ; then
+ AC_DEFINE([HAVE_SA_FAMILY_T], [1],
+ [define if you have sa_family_t data type])
+fi
+
+AC_CACHE_CHECK([for pid_t], ac_cv_have_pid_t, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
+ [[ pid_t foo; foo = 1235; ]])],
+ [ ac_cv_have_pid_t="yes" ], [ ac_cv_have_pid_t="no"
+ ])
+])
+if test "x$ac_cv_have_pid_t" = "xyes" ; then
+ AC_DEFINE([HAVE_PID_T], [1], [define if you have pid_t data type])
+fi
+
+AC_CACHE_CHECK([for mode_t], ac_cv_have_mode_t, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/types.h> ]],
+ [[ mode_t foo; foo = 1235; ]])],
+ [ ac_cv_have_mode_t="yes" ], [ ac_cv_have_mode_t="no"
+ ])
+])
+if test "x$ac_cv_have_mode_t" = "xyes" ; then
+ AC_DEFINE([HAVE_MODE_T], [1], [define if you have mode_t data type])
+fi
+
+
+AC_CACHE_CHECK([for struct sockaddr_storage], ac_cv_have_struct_sockaddr_storage, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/socket.h>
+ ]], [[ struct sockaddr_storage s; ]])],
+ [ ac_cv_have_struct_sockaddr_storage="yes" ],
+ [ ac_cv_have_struct_sockaddr_storage="no"
+ ])
+])
+if test "x$ac_cv_have_struct_sockaddr_storage" = "xyes" ; then
+ AC_DEFINE([HAVE_STRUCT_SOCKADDR_STORAGE], [1],
+ [define if you have struct sockaddr_storage data type])
+fi
+
+AC_CACHE_CHECK([for struct sockaddr_in6], ac_cv_have_struct_sockaddr_in6, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <netinet/in.h>
+ ]], [[ struct sockaddr_in6 s; s.sin6_family = 0; ]])],
+ [ ac_cv_have_struct_sockaddr_in6="yes" ],
+ [ ac_cv_have_struct_sockaddr_in6="no"
+ ])
+])
+if test "x$ac_cv_have_struct_sockaddr_in6" = "xyes" ; then
+ AC_DEFINE([HAVE_STRUCT_SOCKADDR_IN6], [1],
+ [define if you have struct sockaddr_in6 data type])
+fi
+
+AC_CACHE_CHECK([for struct in6_addr], ac_cv_have_struct_in6_addr, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <netinet/in.h>
+ ]], [[ struct in6_addr s; s.s6_addr[0] = 0; ]])],
+ [ ac_cv_have_struct_in6_addr="yes" ],
+ [ ac_cv_have_struct_in6_addr="no"
+ ])
+])
+if test "x$ac_cv_have_struct_in6_addr" = "xyes" ; then
+ AC_DEFINE([HAVE_STRUCT_IN6_ADDR], [1],
+ [define if you have struct in6_addr data type])
+
+dnl Now check for sin6_scope_id
+ AC_CHECK_MEMBERS([struct sockaddr_in6.sin6_scope_id], , ,
+ [
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#include <netinet/in.h>
+ ])
+fi
+
+AC_CACHE_CHECK([for struct addrinfo], ac_cv_have_struct_addrinfo, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netdb.h>
+ ]], [[ struct addrinfo s; s.ai_flags = AI_PASSIVE; ]])],
+ [ ac_cv_have_struct_addrinfo="yes" ],
+ [ ac_cv_have_struct_addrinfo="no"
+ ])
+])
+if test "x$ac_cv_have_struct_addrinfo" = "xyes" ; then
+ AC_DEFINE([HAVE_STRUCT_ADDRINFO], [1],
+ [define if you have struct addrinfo data type])
+fi
+
+AC_CACHE_CHECK([for struct timeval], ac_cv_have_struct_timeval, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <sys/time.h> ]],
+ [[ struct timeval tv; tv.tv_sec = 1;]])],
+ [ ac_cv_have_struct_timeval="yes" ],
+ [ ac_cv_have_struct_timeval="no"
+ ])
+])
+if test "x$ac_cv_have_struct_timeval" = "xyes" ; then
+ AC_DEFINE([HAVE_STRUCT_TIMEVAL], [1], [define if you have struct timeval])
+ have_struct_timeval=1
+fi
+
+AC_CACHE_CHECK([for struct timespec], ac_cv_have_struct_timespec, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+ #ifdef HAVE_SYS_TIME_H
+ # include <sys/time.h>
+ #endif
+ #ifdef HAVE_TIME_H
+ # include <time.h>
+ #endif
+ ]],
+ [[ struct timespec ts; ts.tv_sec = 1;]])],
+ [ ac_cv_have_struct_timespec="yes" ],
+ [ ac_cv_have_struct_timespec="no"
+ ])
+])
+if test "x$ac_cv_have_struct_timespec" = "xyes" ; then
+ AC_DEFINE([HAVE_STRUCT_TIMESPEC], [1], [define if you have struct timespec])
+ have_struct_timespec=1
+fi
+
+# We need int64_t or else certain parts of the compile will fail.
+if test "x$ac_cv_have_int64_t" = "xno" && \
+ test "x$ac_cv_sizeof_long_int" != "x8" && \
+ test "x$ac_cv_sizeof_long_long_int" = "x0" ; then
+ echo "OpenSSH requires int64_t support. Contact your vendor or install"
+ echo "an alternative compiler (I.E., GCC) before continuing."
+ echo ""
+ exit 1;
+else
+dnl test snprintf (broken on SCO w/gcc)
+ AC_RUN_IFELSE(
+ [AC_LANG_SOURCE([[
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_SNPRINTF
+main()
+{
+ char buf[50];
+ char expected_out[50];
+ int mazsize = 50 ;
+#if (SIZEOF_LONG_INT == 8)
+ long int num = 0x7fffffffffffffff;
+#else
+ long long num = 0x7fffffffffffffffll;
+#endif
+ strcpy(expected_out, "9223372036854775807");
+ snprintf(buf, mazsize, "%lld", num);
+ if(strcmp(buf, expected_out) != 0)
+ exit(1);
+ exit(0);
+}
+#else
+main() { exit(0); }
+#endif
+ ]])], [ true ], [ AC_DEFINE([BROKEN_SNPRINTF]) ],
+ AC_MSG_WARN([cross compiling: Assuming working snprintf()])
+ )
+fi
+
+dnl Checks for structure members
+OSSH_CHECK_HEADER_FOR_FIELD([ut_host], [utmp.h], [HAVE_HOST_IN_UTMP])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_host], [utmpx.h], [HAVE_HOST_IN_UTMPX])
+OSSH_CHECK_HEADER_FOR_FIELD([syslen], [utmpx.h], [HAVE_SYSLEN_IN_UTMPX])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_pid], [utmp.h], [HAVE_PID_IN_UTMP])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_type], [utmp.h], [HAVE_TYPE_IN_UTMP])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_type], [utmpx.h], [HAVE_TYPE_IN_UTMPX])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_tv], [utmp.h], [HAVE_TV_IN_UTMP])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_id], [utmp.h], [HAVE_ID_IN_UTMP])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_id], [utmpx.h], [HAVE_ID_IN_UTMPX])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_addr], [utmp.h], [HAVE_ADDR_IN_UTMP])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_addr], [utmpx.h], [HAVE_ADDR_IN_UTMPX])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_addr_v6], [utmp.h], [HAVE_ADDR_V6_IN_UTMP])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_addr_v6], [utmpx.h], [HAVE_ADDR_V6_IN_UTMPX])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_exit], [utmp.h], [HAVE_EXIT_IN_UTMP])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_time], [utmp.h], [HAVE_TIME_IN_UTMP])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_time], [utmpx.h], [HAVE_TIME_IN_UTMPX])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_tv], [utmpx.h], [HAVE_TV_IN_UTMPX])
+OSSH_CHECK_HEADER_FOR_FIELD([ut_ss], [utmpx.h], [HAVE_SS_IN_UTMPX])
+
+AC_CHECK_MEMBERS([struct stat.st_blksize])
+AC_CHECK_MEMBERS([struct stat.st_mtim])
+AC_CHECK_MEMBERS([struct stat.st_mtime])
+AC_CHECK_MEMBERS([struct passwd.pw_gecos, struct passwd.pw_class,
+struct passwd.pw_change, struct passwd.pw_expire],
+[], [], [[
+#include <sys/types.h>
+#include <pwd.h>
+]])
+
+AC_CHECK_MEMBER([struct __res_state.retrans], [], [AC_DEFINE([__res_state], [state],
+ [Define if we don't have struct __res_state in resolv.h])],
+[[
+#include <stdio.h>
+#if HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+]])
+
+AC_CACHE_CHECK([for ss_family field in struct sockaddr_storage],
+ ac_cv_have_ss_family_in_struct_ss, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/socket.h>
+ ]], [[ struct sockaddr_storage s; s.ss_family = 1; ]])],
+ [ ac_cv_have_ss_family_in_struct_ss="yes" ],
+ [ ac_cv_have_ss_family_in_struct_ss="no" ])
+])
+if test "x$ac_cv_have_ss_family_in_struct_ss" = "xyes" ; then
+ AC_DEFINE([HAVE_SS_FAMILY_IN_SS], [1], [Fields in struct sockaddr_storage])
+fi
+
+AC_CACHE_CHECK([for __ss_family field in struct sockaddr_storage],
+ ac_cv_have___ss_family_in_struct_ss, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/socket.h>
+ ]], [[ struct sockaddr_storage s; s.__ss_family = 1; ]])],
+ [ ac_cv_have___ss_family_in_struct_ss="yes" ],
+ [ ac_cv_have___ss_family_in_struct_ss="no"
+ ])
+])
+if test "x$ac_cv_have___ss_family_in_struct_ss" = "xyes" ; then
+ AC_DEFINE([HAVE___SS_FAMILY_IN_SS], [1],
+ [Fields in struct sockaddr_storage])
+fi
+
+dnl make sure we're using the real structure members and not defines
+AC_CACHE_CHECK([for msg_accrights field in struct msghdr],
+ ac_cv_have_accrights_in_msghdr, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#include <stdlib.h>
+ ]], [[
+#ifdef msg_accrights
+#error "msg_accrights is a macro"
+exit(1);
+#endif
+struct msghdr m;
+m.msg_accrights = 0;
+exit(0);
+ ]])],
+ [ ac_cv_have_accrights_in_msghdr="yes" ],
+ [ ac_cv_have_accrights_in_msghdr="no" ]
+ )
+])
+if test "x$ac_cv_have_accrights_in_msghdr" = "xyes" ; then
+ AC_DEFINE([HAVE_ACCRIGHTS_IN_MSGHDR], [1],
+ [Define if your system uses access rights style
+ file descriptor passing])
+fi
+
+AC_MSG_CHECKING([if struct statvfs.f_fsid is integral type])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/param.h>
+#include <sys/stat.h>
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#ifdef HAVE_SYS_MOUNT_H
+#include <sys/mount.h>
+#endif
+#ifdef HAVE_SYS_STATVFS_H
+#include <sys/statvfs.h>
+#endif
+ ]], [[ struct statvfs s; s.f_fsid = 0; ]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [ AC_MSG_RESULT([no])
+
+ AC_MSG_CHECKING([if fsid_t has member val])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/statvfs.h>
+ ]], [[ fsid_t t; t.val[0] = 0; ]])],
+ [ AC_MSG_RESULT([yes])
+ AC_DEFINE([FSID_HAS_VAL], [1], [fsid_t has member val]) ],
+ [ AC_MSG_RESULT([no]) ])
+
+ AC_MSG_CHECKING([if f_fsid has member __val])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/statvfs.h>
+ ]], [[ fsid_t t; t.__val[0] = 0; ]])],
+ [ AC_MSG_RESULT([yes])
+ AC_DEFINE([FSID_HAS___VAL], [1], [fsid_t has member __val]) ],
+ [ AC_MSG_RESULT([no]) ])
+])
+
+AC_CACHE_CHECK([for msg_control field in struct msghdr],
+ ac_cv_have_control_in_msghdr, [
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#include <stdlib.h>
+ ]], [[
+#ifdef msg_control
+#error "msg_control is a macro"
+exit(1);
+#endif
+struct msghdr m;
+m.msg_control = 0;
+exit(0);
+ ]])],
+ [ ac_cv_have_control_in_msghdr="yes" ],
+ [ ac_cv_have_control_in_msghdr="no" ]
+ )
+])
+if test "x$ac_cv_have_control_in_msghdr" = "xyes" ; then
+ AC_DEFINE([HAVE_CONTROL_IN_MSGHDR], [1],
+ [Define if your system uses ancillary data style
+ file descriptor passing])
+fi
+
+AC_CACHE_CHECK([if libc defines __progname], ac_cv_libc_defines___progname, [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]],
+ [[ extern char *__progname; printf("%s", __progname); ]])],
+ [ ac_cv_libc_defines___progname="yes" ],
+ [ ac_cv_libc_defines___progname="no"
+ ])
+])
+if test "x$ac_cv_libc_defines___progname" = "xyes" ; then
+ AC_DEFINE([HAVE___PROGNAME], [1], [Define if libc defines __progname])
+fi
+
+AC_CACHE_CHECK([whether $CC implements __FUNCTION__], ac_cv_cc_implements___FUNCTION__, [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]],
+ [[ printf("%s", __FUNCTION__); ]])],
+ [ ac_cv_cc_implements___FUNCTION__="yes" ],
+ [ ac_cv_cc_implements___FUNCTION__="no"
+ ])
+])
+if test "x$ac_cv_cc_implements___FUNCTION__" = "xyes" ; then
+ AC_DEFINE([HAVE___FUNCTION__], [1],
+ [Define if compiler implements __FUNCTION__])
+fi
+
+AC_CACHE_CHECK([whether $CC implements __func__], ac_cv_cc_implements___func__, [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]],
+ [[ printf("%s", __func__); ]])],
+ [ ac_cv_cc_implements___func__="yes" ],
+ [ ac_cv_cc_implements___func__="no"
+ ])
+])
+if test "x$ac_cv_cc_implements___func__" = "xyes" ; then
+ AC_DEFINE([HAVE___func__], [1], [Define if compiler implements __func__])
+fi
+
+AC_CACHE_CHECK([whether va_copy exists], ac_cv_have_va_copy, [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <stdarg.h>
+va_list x,y;
+ ]], [[ va_copy(x,y); ]])],
+ [ ac_cv_have_va_copy="yes" ],
+ [ ac_cv_have_va_copy="no"
+ ])
+])
+if test "x$ac_cv_have_va_copy" = "xyes" ; then
+ AC_DEFINE([HAVE_VA_COPY], [1], [Define if va_copy exists])
+fi
+
+AC_CACHE_CHECK([whether __va_copy exists], ac_cv_have___va_copy, [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <stdarg.h>
+va_list x,y;
+ ]], [[ __va_copy(x,y); ]])],
+ [ ac_cv_have___va_copy="yes" ], [ ac_cv_have___va_copy="no"
+ ])
+])
+if test "x$ac_cv_have___va_copy" = "xyes" ; then
+ AC_DEFINE([HAVE___VA_COPY], [1], [Define if __va_copy exists])
+fi
+
+AC_CACHE_CHECK([whether getopt has optreset support],
+ ac_cv_have_getopt_optreset, [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <getopt.h> ]],
+ [[ extern int optreset; optreset = 0; ]])],
+ [ ac_cv_have_getopt_optreset="yes" ],
+ [ ac_cv_have_getopt_optreset="no"
+ ])
+])
+if test "x$ac_cv_have_getopt_optreset" = "xyes" ; then
+ AC_DEFINE([HAVE_GETOPT_OPTRESET], [1],
+ [Define if your getopt(3) defines and uses optreset])
+fi
+
+AC_CACHE_CHECK([if libc defines sys_errlist], ac_cv_libc_defines_sys_errlist, [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]],
+[[ extern const char *const sys_errlist[]; printf("%s", sys_errlist[0]);]])],
+ [ ac_cv_libc_defines_sys_errlist="yes" ],
+ [ ac_cv_libc_defines_sys_errlist="no"
+ ])
+])
+if test "x$ac_cv_libc_defines_sys_errlist" = "xyes" ; then
+ AC_DEFINE([HAVE_SYS_ERRLIST], [1],
+ [Define if your system defines sys_errlist[]])
+fi
+
+
+AC_CACHE_CHECK([if libc defines sys_nerr], ac_cv_libc_defines_sys_nerr, [
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <stdio.h> ]],
+[[ extern int sys_nerr; printf("%i", sys_nerr);]])],
+ [ ac_cv_libc_defines_sys_nerr="yes" ],
+ [ ac_cv_libc_defines_sys_nerr="no"
+ ])
+])
+if test "x$ac_cv_libc_defines_sys_nerr" = "xyes" ; then
+ AC_DEFINE([HAVE_SYS_NERR], [1], [Define if your system defines sys_nerr])
+fi
+
+# Check libraries needed by DNS fingerprint support
+AC_SEARCH_LIBS([getrrsetbyname], [resolv],
+ [AC_DEFINE([HAVE_GETRRSETBYNAME], [1],
+ [Define if getrrsetbyname() exists])],
+ [
+ # Needed by our getrrsetbyname()
+ AC_SEARCH_LIBS([res_query], [resolv])
+ AC_SEARCH_LIBS([dn_expand], [resolv])
+ AC_MSG_CHECKING([if res_query will link])
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <netdb.h>
+#include <resolv.h>
+ ]], [[
+ res_query (0, 0, 0, 0, 0);
+ ]])],
+ AC_MSG_RESULT([yes]),
+ [AC_MSG_RESULT([no])
+ saved_LIBS="$LIBS"
+ LIBS="$LIBS -lresolv"
+ AC_MSG_CHECKING([for res_query in -lresolv])
+ AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <netdb.h>
+#include <resolv.h>
+ ]], [[
+ res_query (0, 0, 0, 0, 0);
+ ]])],
+ [AC_MSG_RESULT([yes])],
+ [LIBS="$saved_LIBS"
+ AC_MSG_RESULT([no])])
+ ])
+ AC_CHECK_FUNCS([_getshort _getlong])
+ AC_CHECK_DECLS([_getshort, _getlong], , ,
+ [#include <sys/types.h>
+ #include <arpa/nameser.h>])
+ AC_CHECK_MEMBER([HEADER.ad],
+ [AC_DEFINE([HAVE_HEADER_AD], [1],
+ [Define if HEADER.ad exists in arpa/nameser.h])], ,
+ [#include <arpa/nameser.h>])
+ ])
+
+AC_MSG_CHECKING([if struct __res_state _res is an extern])
+AC_LINK_IFELSE([AC_LANG_PROGRAM([[
+#include <stdio.h>
+#if HAVE_SYS_TYPES_H
+# include <sys/types.h>
+#endif
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <resolv.h>
+extern struct __res_state _res;
+ ]], [[
+struct __res_state *volatile p = &_res; /* force resolution of _res */
+return 0;
+ ]],)],
+ [AC_MSG_RESULT([yes])
+ AC_DEFINE([HAVE__RES_EXTERN], [1],
+ [Define if you have struct __res_state _res as an extern])
+ ],
+ [ AC_MSG_RESULT([no]) ]
+)
+
+# Check whether user wants SELinux support
+SELINUX_MSG="no"
+LIBSELINUX=""
+AC_ARG_WITH([selinux],
+ [ --with-selinux Enable SELinux support],
+ [ if test "x$withval" != "xno" ; then
+ save_LIBS="$LIBS"
+ AC_DEFINE([WITH_SELINUX], [1],
+ [Define if you want SELinux support.])
+ SELINUX_MSG="yes"
+ AC_CHECK_HEADER([selinux/selinux.h], ,
+ AC_MSG_ERROR([SELinux support requires selinux.h header]))
+ AC_CHECK_LIB([selinux], [setexeccon],
+ [ LIBSELINUX="-lselinux"
+ LIBS="$LIBS -lselinux"
+ ],
+ AC_MSG_ERROR([SELinux support requires libselinux library]))
+ AC_CHECK_FUNCS([getseuserbyname get_default_context_with_level])
+ LIBS="$save_LIBS $LIBSELINUX"
+ fi ]
+)
+AC_SUBST([SSHDLIBS])
+
+# Check whether user wants Kerberos 5 support
+KRB5_MSG="no"
+AC_ARG_WITH([kerberos5],
+ [ --with-kerberos5=PATH Enable Kerberos 5 support],
+ [ if test "x$withval" != "xno" ; then
+ if test "x$withval" = "xyes" ; then
+ KRB5ROOT="/usr/local"
+ else
+ KRB5ROOT=${withval}
+ fi
+
+ AC_DEFINE([KRB5], [1], [Define if you want Kerberos 5 support])
+ KRB5_MSG="yes"
+
+ AC_PATH_TOOL([KRB5CONF], [krb5-config],
+ [$KRB5ROOT/bin/krb5-config],
+ [$KRB5ROOT/bin:$PATH])
+ if test -x $KRB5CONF ; then
+ K5CFLAGS="`$KRB5CONF --cflags`"
+ K5LIBS="`$KRB5CONF --libs`"
+ CPPFLAGS="$CPPFLAGS $K5CFLAGS"
+
+ AC_MSG_CHECKING([for gssapi support])
+ if $KRB5CONF | grep gssapi >/dev/null ; then
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([GSSAPI], [1],
+ [Define this if you want GSSAPI
+ support in the version 2 protocol])
+ GSSCFLAGS="`$KRB5CONF --cflags gssapi`"
+ GSSLIBS="`$KRB5CONF --libs gssapi`"
+ CPPFLAGS="$CPPFLAGS $GSSCFLAGS"
+ else
+ AC_MSG_RESULT([no])
+ fi
+ AC_MSG_CHECKING([whether we are using Heimdal])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <krb5.h>
+ ]], [[ char *tmp = heimdal_version; ]])],
+ [ AC_MSG_RESULT([yes])
+ AC_DEFINE([HEIMDAL], [1],
+ [Define this if you are using the Heimdal
+ version of Kerberos V5]) ],
+ [AC_MSG_RESULT([no])
+ ])
+ else
+ CPPFLAGS="$CPPFLAGS -I${KRB5ROOT}/include"
+ LDFLAGS="$LDFLAGS -L${KRB5ROOT}/lib"
+ AC_MSG_CHECKING([whether we are using Heimdal])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #include <krb5.h>
+ ]], [[ char *tmp = heimdal_version; ]])],
+ [ AC_MSG_RESULT([yes])
+ AC_DEFINE([HEIMDAL])
+ K5LIBS="-lkrb5"
+ K5LIBS="$K5LIBS -lcom_err -lasn1"
+ AC_CHECK_LIB([roken], [net_write],
+ [K5LIBS="$K5LIBS -lroken"])
+ AC_CHECK_LIB([des], [des_cbc_encrypt],
+ [K5LIBS="$K5LIBS -ldes"])
+ ], [ AC_MSG_RESULT([no])
+ K5LIBS="-lkrb5 -lk5crypto -lcom_err"
+ ])
+ AC_SEARCH_LIBS([dn_expand], [resolv])
+
+ AC_CHECK_LIB([gssapi_krb5], [gss_init_sec_context],
+ [ AC_DEFINE([GSSAPI])
+ GSSLIBS="-lgssapi_krb5" ],
+ [ AC_CHECK_LIB([gssapi], [gss_init_sec_context],
+ [ AC_DEFINE([GSSAPI])
+ GSSLIBS="-lgssapi" ],
+ [ AC_CHECK_LIB([gss], [gss_init_sec_context],
+ [ AC_DEFINE([GSSAPI])
+ GSSLIBS="-lgss" ],
+ AC_MSG_WARN([Cannot find any suitable gss-api library - build may fail]))
+ ])
+ ])
+
+ AC_CHECK_HEADER([gssapi.h], ,
+ [ unset ac_cv_header_gssapi_h
+ CPPFLAGS="$CPPFLAGS -I${KRB5ROOT}/include/gssapi"
+ AC_CHECK_HEADERS([gssapi.h], ,
+ AC_MSG_WARN([Cannot find any suitable gss-api header - build may fail])
+ )
+ ]
+ )
+
+ oldCPP="$CPPFLAGS"
+ CPPFLAGS="$CPPFLAGS -I${KRB5ROOT}/include/gssapi"
+ AC_CHECK_HEADER([gssapi_krb5.h], ,
+ [ CPPFLAGS="$oldCPP" ])
+
+ fi
+ if test -n "${rpath_opt}" ; then
+ LDFLAGS="$LDFLAGS ${rpath_opt}${KRB5ROOT}/lib"
+ fi
+ if test ! -z "$blibpath" ; then
+ blibpath="$blibpath:${KRB5ROOT}/lib"
+ fi
+
+ AC_CHECK_HEADERS([gssapi.h gssapi/gssapi.h])
+ AC_CHECK_HEADERS([gssapi_krb5.h gssapi/gssapi_krb5.h])
+ AC_CHECK_HEADERS([gssapi_generic.h gssapi/gssapi_generic.h])
+
+ AC_SEARCH_LIBS([k_hasafs], [kafs], [AC_DEFINE([USE_AFS], [1],
+ [Define this if you want to use libkafs' AFS support])])
+
+ AC_CHECK_DECLS([GSS_C_NT_HOSTBASED_SERVICE], [], [], [[
+#ifdef HAVE_GSSAPI_H
+# include <gssapi.h>
+#elif defined(HAVE_GSSAPI_GSSAPI_H)
+# include <gssapi/gssapi.h>
+#endif
+
+#ifdef HAVE_GSSAPI_GENERIC_H
+# include <gssapi_generic.h>
+#elif defined(HAVE_GSSAPI_GSSAPI_GENERIC_H)
+# include <gssapi/gssapi_generic.h>
+#endif
+ ]])
+ saved_LIBS="$LIBS"
+ LIBS="$LIBS $K5LIBS"
+ AC_CHECK_FUNCS([krb5_cc_new_unique krb5_get_error_message krb5_free_error_message])
+ LIBS="$saved_LIBS"
+
+ fi
+ ]
+)
+AC_SUBST([GSSLIBS])
+AC_SUBST([K5LIBS])
+
+# Looking for programs, paths and files
+
+PRIVSEP_PATH=/var/empty
+AC_ARG_WITH([privsep-path],
+ [ --with-privsep-path=xxx Path for privilege separation chroot (default=/var/empty)],
+ [
+ if test -n "$withval" && test "x$withval" != "xno" && \
+ test "x${withval}" != "xyes"; then
+ PRIVSEP_PATH=$withval
+ fi
+ ]
+)
+AC_SUBST([PRIVSEP_PATH])
+
+AC_ARG_WITH([xauth],
+ [ --with-xauth=PATH Specify path to xauth program ],
+ [
+ if test -n "$withval" && test "x$withval" != "xno" && \
+ test "x${withval}" != "xyes"; then
+ xauth_path=$withval
+ fi
+ ],
+ [
+ TestPath="$PATH"
+ TestPath="${TestPath}${PATH_SEPARATOR}/usr/X/bin"
+ TestPath="${TestPath}${PATH_SEPARATOR}/usr/bin/X11"
+ TestPath="${TestPath}${PATH_SEPARATOR}/usr/X11R6/bin"
+ TestPath="${TestPath}${PATH_SEPARATOR}/usr/openwin/bin"
+ AC_PATH_PROG([xauth_path], [xauth], , [$TestPath])
+ if (test ! -z "$xauth_path" && test -x "/usr/openwin/bin/xauth") ; then
+ xauth_path="/usr/openwin/bin/xauth"
+ fi
+ ]
+)
+
+STRIP_OPT=-s
+AC_ARG_ENABLE([strip],
+ [ --disable-strip Disable calling strip(1) on install],
+ [
+ if test "x$enableval" = "xno" ; then
+ STRIP_OPT=
+ fi
+ ]
+)
+AC_SUBST([STRIP_OPT])
+
+if test -z "$xauth_path" ; then
+ XAUTH_PATH="undefined"
+ AC_SUBST([XAUTH_PATH])
+else
+ AC_DEFINE_UNQUOTED([XAUTH_PATH], ["$xauth_path"],
+ [Define if xauth is found in your path])
+ XAUTH_PATH=$xauth_path
+ AC_SUBST([XAUTH_PATH])
+fi
+
+dnl # --with-maildir=/path/to/mail gets top priority.
+dnl # if maildir is set in the platform case statement above we use that.
+dnl # Otherwise we run a program to get the dir from system headers.
+dnl # We first look for _PATH_MAILDIR then MAILDIR then _PATH_MAIL
+dnl # If we find _PATH_MAILDIR we do nothing because that is what
+dnl # session.c expects anyway. Otherwise we set to the value found
+dnl # stripping any trailing slash. If for some strage reason our program
+dnl # does not find what it needs, we default to /var/spool/mail.
+# Check for mail directory
+AC_ARG_WITH([maildir],
+ [ --with-maildir=/path/to/mail Specify your system mail directory],
+ [
+ if test "X$withval" != X && test "x$withval" != xno && \
+ test "x${withval}" != xyes; then
+ AC_DEFINE_UNQUOTED([MAIL_DIRECTORY], ["$withval"],
+ [Set this to your mail directory if you do not have _PATH_MAILDIR])
+ fi
+ ],[
+ if test "X$maildir" != "X"; then
+ AC_DEFINE_UNQUOTED([MAIL_DIRECTORY], ["$maildir"])
+ else
+ AC_MSG_CHECKING([Discovering system mail directory])
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#ifdef HAVE_PATHS_H
+#include <paths.h>
+#endif
+#ifdef HAVE_MAILLOCK_H
+#include <maillock.h>
+#endif
+#define DATA "conftest.maildir"
+ ]], [[
+ FILE *fd;
+ int rc;
+
+ fd = fopen(DATA,"w");
+ if(fd == NULL)
+ exit(1);
+
+#if defined (_PATH_MAILDIR)
+ if ((rc = fprintf(fd ,"_PATH_MAILDIR:%s\n", _PATH_MAILDIR)) <0)
+ exit(1);
+#elif defined (MAILDIR)
+ if ((rc = fprintf(fd ,"MAILDIR:%s\n", MAILDIR)) <0)
+ exit(1);
+#elif defined (_PATH_MAIL)
+ if ((rc = fprintf(fd ,"_PATH_MAIL:%s\n", _PATH_MAIL)) <0)
+ exit(1);
+#else
+ exit (2);
+#endif
+
+ exit(0);
+ ]])],
+ [
+ maildir_what=`awk -F: '{print $1}' conftest.maildir`
+ maildir=`awk -F: '{print $2}' conftest.maildir \
+ | sed 's|/$||'`
+ AC_MSG_RESULT([Using: $maildir from $maildir_what])
+ if test "x$maildir_what" != "x_PATH_MAILDIR"; then
+ AC_DEFINE_UNQUOTED([MAIL_DIRECTORY], ["$maildir"])
+ fi
+ ],
+ [
+ if test "X$ac_status" = "X2";then
+# our test program didn't find it. Default to /var/spool/mail
+ AC_MSG_RESULT([Using: default value of /var/spool/mail])
+ AC_DEFINE_UNQUOTED([MAIL_DIRECTORY], ["/var/spool/mail"])
+ else
+ AC_MSG_RESULT([*** not found ***])
+ fi
+ ],
+ [
+ AC_MSG_WARN([cross compiling: use --with-maildir=/path/to/mail])
+ ]
+ )
+ fi
+ ]
+) # maildir
+
+if test ! -z "$cross_compiling" && test "x$cross_compiling" = "xyes"; then
+ AC_MSG_WARN([cross compiling: Disabling /dev/ptmx test])
+ disable_ptmx_check=yes
+fi
+if test -z "$no_dev_ptmx" ; then
+ if test "x$disable_ptmx_check" != "xyes" ; then
+ AC_CHECK_FILE(["/dev/ptmx"],
+ [
+ AC_DEFINE_UNQUOTED([HAVE_DEV_PTMX], [1],
+ [Define if you have /dev/ptmx])
+ have_dev_ptmx=1
+ ]
+ )
+ fi
+fi
+
+if test ! -z "$cross_compiling" && test "x$cross_compiling" != "xyes"; then
+ AC_CHECK_FILE(["/dev/ptc"],
+ [
+ AC_DEFINE_UNQUOTED([HAVE_DEV_PTS_AND_PTC], [1],
+ [Define if you have /dev/ptc])
+ have_dev_ptc=1
+ ]
+ )
+else
+ AC_MSG_WARN([cross compiling: Disabling /dev/ptc test])
+fi
+
+# Options from here on. Some of these are preset by platform above
+AC_ARG_WITH([mantype],
+ [ --with-mantype=man|cat|doc Set man page type],
+ [
+ case "$withval" in
+ man|cat|doc)
+ MANTYPE=$withval
+ ;;
+ *)
+ AC_MSG_ERROR([invalid man type: $withval])
+ ;;
+ esac
+ ]
+)
+if test -z "$MANTYPE"; then
+ if ${MANDOC} ${srcdir}/ssh.1 >/dev/null 2>&1; then
+ MANTYPE=doc
+ elif ${NROFF} -mdoc ${srcdir}/ssh.1 >/dev/null 2>&1; then
+ MANTYPE=doc
+ elif ${NROFF} -man ${srcdir}/ssh.1 >/dev/null 2>&1; then
+ MANTYPE=man
+ else
+ MANTYPE=cat
+ fi
+fi
+AC_SUBST([MANTYPE])
+if test "$MANTYPE" = "doc"; then
+ mansubdir=man;
+else
+ mansubdir=$MANTYPE;
+fi
+AC_SUBST([mansubdir])
+
+# Check whether to enable MD5 passwords
+MD5_MSG="no"
+AC_ARG_WITH([md5-passwords],
+ [ --with-md5-passwords Enable use of MD5 passwords],
+ [
+ if test "x$withval" != "xno" ; then
+ AC_DEFINE([HAVE_MD5_PASSWORDS], [1],
+ [Define if you want to allow MD5 passwords])
+ MD5_MSG="yes"
+ fi
+ ]
+)
+
+# Whether to disable shadow password support
+AC_ARG_WITH([shadow],
+ [ --without-shadow Disable shadow password support],
+ [
+ if test "x$withval" = "xno" ; then
+ AC_DEFINE([DISABLE_SHADOW])
+ disable_shadow=yes
+ fi
+ ]
+)
+
+if test -z "$disable_shadow" ; then
+ AC_MSG_CHECKING([if the systems has expire shadow information])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <shadow.h>
+struct spwd sp;
+ ]], [[ sp.sp_expire = sp.sp_lstchg = sp.sp_inact = 0; ]])],
+ [ sp_expire_available=yes ], [
+ ])
+
+ if test "x$sp_expire_available" = "xyes" ; then
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([HAS_SHADOW_EXPIRE], [1],
+ [Define if you want to use shadow password expire field])
+ else
+ AC_MSG_RESULT([no])
+ fi
+fi
+
+# Use ip address instead of hostname in $DISPLAY
+if test ! -z "$IPADDR_IN_DISPLAY" ; then
+ DISPLAY_HACK_MSG="yes"
+ AC_DEFINE([IPADDR_IN_DISPLAY], [1],
+ [Define if you need to use IP address
+ instead of hostname in $DISPLAY])
+else
+ DISPLAY_HACK_MSG="no"
+ AC_ARG_WITH([ipaddr-display],
+ [ --with-ipaddr-display Use ip address instead of hostname in $DISPLAY],
+ [
+ if test "x$withval" != "xno" ; then
+ AC_DEFINE([IPADDR_IN_DISPLAY])
+ DISPLAY_HACK_MSG="yes"
+ fi
+ ]
+ )
+fi
+
+# check for /etc/default/login and use it if present.
+AC_ARG_ENABLE([etc-default-login],
+ [ --disable-etc-default-login Disable using PATH from /etc/default/login [no]],
+ [ if test "x$enableval" = "xno"; then
+ AC_MSG_NOTICE([/etc/default/login handling disabled])
+ etc_default_login=no
+ else
+ etc_default_login=yes
+ fi ],
+ [ if test ! -z "$cross_compiling" && test "x$cross_compiling" = "xyes";
+ then
+ AC_MSG_WARN([cross compiling: not checking /etc/default/login])
+ etc_default_login=no
+ else
+ etc_default_login=yes
+ fi ]
+)
+
+if test "x$etc_default_login" != "xno"; then
+ AC_CHECK_FILE(["/etc/default/login"],
+ [ external_path_file=/etc/default/login ])
+ if test "x$external_path_file" = "x/etc/default/login"; then
+ AC_DEFINE([HAVE_ETC_DEFAULT_LOGIN], [1],
+ [Define if your system has /etc/default/login])
+ fi
+fi
+
+dnl BSD systems use /etc/login.conf so --with-default-path= has no effect
+if test $ac_cv_func_login_getcapbool = "yes" && \
+ test $ac_cv_header_login_cap_h = "yes" ; then
+ external_path_file=/etc/login.conf
+fi
+
+# Whether to mess with the default path
+SERVER_PATH_MSG="(default)"
+AC_ARG_WITH([default-path],
+ [ --with-default-path= Specify default $PATH environment for server],
+ [
+ if test "x$external_path_file" = "x/etc/login.conf" ; then
+ AC_MSG_WARN([
+--with-default-path=PATH has no effect on this system.
+Edit /etc/login.conf instead.])
+ elif test "x$withval" != "xno" ; then
+ if test ! -z "$external_path_file" ; then
+ AC_MSG_WARN([
+--with-default-path=PATH will only be used if PATH is not defined in
+$external_path_file .])
+ fi
+ user_path="$withval"
+ SERVER_PATH_MSG="$withval"
+ fi
+ ],
+ [ if test "x$external_path_file" = "x/etc/login.conf" ; then
+ AC_MSG_WARN([Make sure the path to scp is in /etc/login.conf])
+ else
+ if test ! -z "$external_path_file" ; then
+ AC_MSG_WARN([
+If PATH is defined in $external_path_file, ensure the path to scp is included,
+otherwise scp will not work.])
+ fi
+ AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+/* find out what STDPATH is */
+#include <stdio.h>
+#include <stdlib.h>
+#ifdef HAVE_PATHS_H
+# include <paths.h>
+#endif
+#ifndef _PATH_STDPATH
+# ifdef _PATH_USERPATH /* Irix */
+# define _PATH_STDPATH _PATH_USERPATH
+# else
+# define _PATH_STDPATH "/usr/bin:/bin:/usr/sbin:/sbin"
+# endif
+#endif
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#define DATA "conftest.stdpath"
+ ]], [[
+ FILE *fd;
+ int rc;
+
+ fd = fopen(DATA,"w");
+ if(fd == NULL)
+ exit(1);
+
+ if ((rc = fprintf(fd,"%s", _PATH_STDPATH)) < 0)
+ exit(1);
+
+ exit(0);
+ ]])],
+ [ user_path=`cat conftest.stdpath` ],
+ [ user_path="/usr/bin:/bin:/usr/sbin:/sbin" ],
+ [ user_path="/usr/bin:/bin:/usr/sbin:/sbin" ]
+ )
+# make sure $bindir is in USER_PATH so scp will work
+ t_bindir="${bindir}"
+ while echo "${t_bindir}" | egrep '\$\{|NONE/' >/dev/null 2>&1; do
+ t_bindir=`eval echo ${t_bindir}`
+ case $t_bindir in
+ NONE/*) t_bindir=`echo $t_bindir | sed "s~NONE~$prefix~"` ;;
+ esac
+ case $t_bindir in
+ NONE/*) t_bindir=`echo $t_bindir | sed "s~NONE~$ac_default_prefix~"` ;;
+ esac
+ done
+ echo $user_path | grep ":$t_bindir" > /dev/null 2>&1
+ if test $? -ne 0 ; then
+ echo $user_path | grep "^$t_bindir" > /dev/null 2>&1
+ if test $? -ne 0 ; then
+ user_path=$user_path:$t_bindir
+ AC_MSG_RESULT([Adding $t_bindir to USER_PATH so scp will work])
+ fi
+ fi
+ fi ]
+)
+if test "x$external_path_file" != "x/etc/login.conf" ; then
+ AC_DEFINE_UNQUOTED([USER_PATH], ["$user_path"], [Specify default $PATH])
+ AC_SUBST([user_path])
+fi
+
+# Set superuser path separately to user path
+AC_ARG_WITH([superuser-path],
+ [ --with-superuser-path= Specify different path for super-user],
+ [
+ if test -n "$withval" && test "x$withval" != "xno" && \
+ test "x${withval}" != "xyes"; then
+ AC_DEFINE_UNQUOTED([SUPERUSER_PATH], ["$withval"],
+ [Define if you want a different $PATH
+ for the superuser])
+ superuser_path=$withval
+ fi
+ ]
+)
+
+
+AC_MSG_CHECKING([if we need to convert IPv4 in IPv6-mapped addresses])
+IPV4_IN6_HACK_MSG="no"
+AC_ARG_WITH(4in6,
+ [ --with-4in6 Check for and convert IPv4 in IPv6 mapped addresses],
+ [
+ if test "x$withval" != "xno" ; then
+ AC_MSG_RESULT([yes])
+ AC_DEFINE([IPV4_IN_IPV6], [1],
+ [Detect IPv4 in IPv6 mapped addresses
+ and treat as IPv4])
+ IPV4_IN6_HACK_MSG="yes"
+ else
+ AC_MSG_RESULT([no])
+ fi
+ ], [
+ if test "x$inet6_default_4in6" = "xyes"; then
+ AC_MSG_RESULT([yes (default)])
+ AC_DEFINE([IPV4_IN_IPV6])
+ IPV4_IN6_HACK_MSG="yes"
+ else
+ AC_MSG_RESULT([no (default)])
+ fi
+ ]
+)
+
+# Whether to enable BSD auth support
+BSD_AUTH_MSG=no
+AC_ARG_WITH([bsd-auth],
+ [ --with-bsd-auth Enable BSD auth support],
+ [
+ if test "x$withval" != "xno" ; then
+ AC_DEFINE([BSD_AUTH], [1],
+ [Define if you have BSD auth support])
+ BSD_AUTH_MSG=yes
+ fi
+ ]
+)
+
+# Where to place sshd.pid
+piddir=/var/run
+# make sure the directory exists
+if test ! -d $piddir ; then
+ piddir=`eval echo ${sysconfdir}`
+ case $piddir in
+ NONE/*) piddir=`echo $piddir | sed "s~NONE~$ac_default_prefix~"` ;;
+ esac
+fi
+
+AC_ARG_WITH([pid-dir],
+ [ --with-pid-dir=PATH Specify location of sshd.pid file],
+ [
+ if test -n "$withval" && test "x$withval" != "xno" && \
+ test "x${withval}" != "xyes"; then
+ piddir=$withval
+ if test ! -d $piddir ; then
+ AC_MSG_WARN([** no $piddir directory on this system **])
+ fi
+ fi
+ ]
+)
+
+AC_DEFINE_UNQUOTED([_PATH_SSH_PIDDIR], ["$piddir"],
+ [Specify location of ssh.pid])
+AC_SUBST([piddir])
+
+dnl allow user to disable some login recording features
+AC_ARG_ENABLE([lastlog],
+ [ --disable-lastlog disable use of lastlog even if detected [no]],
+ [
+ if test "x$enableval" = "xno" ; then
+ AC_DEFINE([DISABLE_LASTLOG])
+ fi
+ ]
+)
+AC_ARG_ENABLE([utmp],
+ [ --disable-utmp disable use of utmp even if detected [no]],
+ [
+ if test "x$enableval" = "xno" ; then
+ AC_DEFINE([DISABLE_UTMP])
+ fi
+ ]
+)
+AC_ARG_ENABLE([utmpx],
+ [ --disable-utmpx disable use of utmpx even if detected [no]],
+ [
+ if test "x$enableval" = "xno" ; then
+ AC_DEFINE([DISABLE_UTMPX], [1],
+ [Define if you don't want to use utmpx])
+ fi
+ ]
+)
+AC_ARG_ENABLE([wtmp],
+ [ --disable-wtmp disable use of wtmp even if detected [no]],
+ [
+ if test "x$enableval" = "xno" ; then
+ AC_DEFINE([DISABLE_WTMP])
+ fi
+ ]
+)
+AC_ARG_ENABLE([wtmpx],
+ [ --disable-wtmpx disable use of wtmpx even if detected [no]],
+ [
+ if test "x$enableval" = "xno" ; then
+ AC_DEFINE([DISABLE_WTMPX], [1],
+ [Define if you don't want to use wtmpx])
+ fi
+ ]
+)
+AC_ARG_ENABLE([libutil],
+ [ --disable-libutil disable use of libutil (login() etc.) [no]],
+ [
+ if test "x$enableval" = "xno" ; then
+ AC_DEFINE([DISABLE_LOGIN])
+ fi
+ ]
+)
+AC_ARG_ENABLE([pututline],
+ [ --disable-pututline disable use of pututline() etc. ([uw]tmp) [no]],
+ [
+ if test "x$enableval" = "xno" ; then
+ AC_DEFINE([DISABLE_PUTUTLINE], [1],
+ [Define if you don't want to use pututline()
+ etc. to write [uw]tmp])
+ fi
+ ]
+)
+AC_ARG_ENABLE([pututxline],
+ [ --disable-pututxline disable use of pututxline() etc. ([uw]tmpx) [no]],
+ [
+ if test "x$enableval" = "xno" ; then
+ AC_DEFINE([DISABLE_PUTUTXLINE], [1],
+ [Define if you don't want to use pututxline()
+ etc. to write [uw]tmpx])
+ fi
+ ]
+)
+AC_ARG_WITH([lastlog],
+ [ --with-lastlog=FILE|DIR specify lastlog location [common locations]],
+ [
+ if test "x$withval" = "xno" ; then
+ AC_DEFINE([DISABLE_LASTLOG])
+ elif test -n "$withval" && test "x${withval}" != "xyes"; then
+ conf_lastlog_location=$withval
+ fi
+ ]
+)
+
+dnl lastlog, [uw]tmpx? detection
+dnl NOTE: set the paths in the platform section to avoid the
+dnl need for command-line parameters
+dnl lastlog and [uw]tmp are subject to a file search if all else fails
+
+dnl lastlog detection
+dnl NOTE: the code itself will detect if lastlog is a directory
+AC_MSG_CHECKING([if your system defines LASTLOG_FILE])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <utmp.h>
+#ifdef HAVE_LASTLOG_H
+# include <lastlog.h>
+#endif
+#ifdef HAVE_PATHS_H
+# include <paths.h>
+#endif
+#ifdef HAVE_LOGIN_H
+# include <login.h>
+#endif
+ ]], [[ char *lastlog = LASTLOG_FILE; ]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [
+ AC_MSG_RESULT([no])
+ AC_MSG_CHECKING([if your system defines _PATH_LASTLOG])
+ AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <utmp.h>
+#ifdef HAVE_LASTLOG_H
+# include <lastlog.h>
+#endif
+#ifdef HAVE_PATHS_H
+# include <paths.h>
+#endif
+ ]], [[ char *lastlog = _PATH_LASTLOG; ]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [
+ AC_MSG_RESULT([no])
+ system_lastlog_path=no
+ ])
+])
+
+if test -z "$conf_lastlog_location"; then
+ if test x"$system_lastlog_path" = x"no" ; then
+ for f in /var/log/lastlog /usr/adm/lastlog /var/adm/lastlog /etc/security/lastlog ; do
+ if (test -d "$f" || test -f "$f") ; then
+ conf_lastlog_location=$f
+ fi
+ done
+ if test -z "$conf_lastlog_location"; then
+ AC_MSG_WARN([** Cannot find lastlog **])
+ dnl Don't define DISABLE_LASTLOG - that means we don't try wtmp/wtmpx
+ fi
+ fi
+fi
+
+if test -n "$conf_lastlog_location"; then
+ AC_DEFINE_UNQUOTED([CONF_LASTLOG_FILE], ["$conf_lastlog_location"],
+ [Define if you want to specify the path to your lastlog file])
+fi
+
+dnl utmp detection
+AC_MSG_CHECKING([if your system defines UTMP_FILE])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <utmp.h>
+#ifdef HAVE_PATHS_H
+# include <paths.h>
+#endif
+ ]], [[ char *utmp = UTMP_FILE; ]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [ AC_MSG_RESULT([no])
+ system_utmp_path=no
+])
+if test -z "$conf_utmp_location"; then
+ if test x"$system_utmp_path" = x"no" ; then
+ for f in /etc/utmp /usr/adm/utmp /var/run/utmp; do
+ if test -f $f ; then
+ conf_utmp_location=$f
+ fi
+ done
+ if test -z "$conf_utmp_location"; then
+ AC_DEFINE([DISABLE_UTMP])
+ fi
+ fi
+fi
+if test -n "$conf_utmp_location"; then
+ AC_DEFINE_UNQUOTED([CONF_UTMP_FILE], ["$conf_utmp_location"],
+ [Define if you want to specify the path to your utmp file])
+fi
+
+dnl wtmp detection
+AC_MSG_CHECKING([if your system defines WTMP_FILE])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <utmp.h>
+#ifdef HAVE_PATHS_H
+# include <paths.h>
+#endif
+ ]], [[ char *wtmp = WTMP_FILE; ]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [ AC_MSG_RESULT([no])
+ system_wtmp_path=no
+])
+if test -z "$conf_wtmp_location"; then
+ if test x"$system_wtmp_path" = x"no" ; then
+ for f in /usr/adm/wtmp /var/log/wtmp; do
+ if test -f $f ; then
+ conf_wtmp_location=$f
+ fi
+ done
+ if test -z "$conf_wtmp_location"; then
+ AC_DEFINE([DISABLE_WTMP])
+ fi
+ fi
+fi
+if test -n "$conf_wtmp_location"; then
+ AC_DEFINE_UNQUOTED([CONF_WTMP_FILE], ["$conf_wtmp_location"],
+ [Define if you want to specify the path to your wtmp file])
+fi
+
+dnl wtmpx detection
+AC_MSG_CHECKING([if your system defines WTMPX_FILE])
+AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
+#include <sys/types.h>
+#include <utmp.h>
+#ifdef HAVE_UTMPX_H
+#include <utmpx.h>
+#endif
+#ifdef HAVE_PATHS_H
+# include <paths.h>
+#endif
+ ]], [[ char *wtmpx = WTMPX_FILE; ]])],
+ [ AC_MSG_RESULT([yes]) ],
+ [ AC_MSG_RESULT([no])
+ system_wtmpx_path=no
+])
+if test -z "$conf_wtmpx_location"; then
+ if test x"$system_wtmpx_path" = x"no" ; then
+ AC_DEFINE([DISABLE_WTMPX])
+ fi
+else
+ AC_DEFINE_UNQUOTED([CONF_WTMPX_FILE], ["$conf_wtmpx_location"],
+ [Define if you want to specify the path to your wtmpx file])
+fi
+
+
+if test ! -z "$blibpath" ; then
+ LDFLAGS="$LDFLAGS $blibflags$blibpath"
+ AC_MSG_WARN([Please check and edit blibpath in LDFLAGS in Makefile])
+fi
+
+AC_CHECK_MEMBER([struct lastlog.ll_line], [], [
+ if test x$SKIP_DISABLE_LASTLOG_DEFINE != "xyes" ; then
+ AC_DEFINE([DISABLE_LASTLOG])
+ fi
+ ], [
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_UTMP_H
+#include <utmp.h>
+#endif
+#ifdef HAVE_UTMPX_H
+#include <utmpx.h>
+#endif
+#ifdef HAVE_LASTLOG_H
+#include <lastlog.h>
+#endif
+ ])
+
+AC_CHECK_MEMBER([struct utmp.ut_line], [], [
+ AC_DEFINE([DISABLE_UTMP])
+ AC_DEFINE([DISABLE_WTMP])
+ ], [
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+#ifdef HAVE_UTMP_H
+#include <utmp.h>
+#endif
+#ifdef HAVE_UTMPX_H
+#include <utmpx.h>
+#endif
+#ifdef HAVE_LASTLOG_H
+#include <lastlog.h>
+#endif
+ ])
+
+dnl Adding -Werror to CFLAGS early prevents configure tests from running.
+dnl Add now.
+CFLAGS="$CFLAGS $werror_flags"
+
+if test "x$ac_cv_func_getaddrinfo" != "xyes" ; then
+ TEST_SSH_IPV6=no
+else
+ TEST_SSH_IPV6=yes
+fi
+AC_CHECK_DECL([BROKEN_GETADDRINFO], [TEST_SSH_IPV6=no])
+AC_SUBST([TEST_SSH_IPV6], [$TEST_SSH_IPV6])
+AC_SUBST([TEST_SSH_UTF8], [$TEST_SSH_UTF8])
+AC_SUBST([TEST_MALLOC_OPTIONS], [$TEST_MALLOC_OPTIONS])
+AC_SUBST([UNSUPPORTED_ALGORITHMS], [$unsupported_algorithms])
+AC_SUBST([DEPEND], [$(cat $srcdir/.depend)])
+
+CFLAGS="${CFLAGS} ${CFLAGS_AFTER}"
+LDFLAGS="${LDFLAGS} ${LDFLAGS_AFTER}"
+
+# Make a copy of CFLAGS/LDFLAGS without PIE options.
+LDFLAGS_NOPIE=`echo "$LDFLAGS" | sed 's/ -pie//'`
+CFLAGS_NOPIE=`echo "$CFLAGS" | sed 's/ -fPIE//'`
+AC_SUBST([LDFLAGS_NOPIE])
+AC_SUBST([CFLAGS_NOPIE])
+
+AC_EXEEXT
+AC_CONFIG_FILES([Makefile buildpkg.sh opensshd.init openssh.xml \
+ openbsd-compat/Makefile openbsd-compat/regress/Makefile \
+ survey.sh])
+AC_OUTPUT
+
+# Print summary of options
+
+# Someone please show me a better way :)
+A=`eval echo ${prefix}` ; A=`eval echo ${A}`
+B=`eval echo ${bindir}` ; B=`eval echo ${B}`
+C=`eval echo ${sbindir}` ; C=`eval echo ${C}`
+D=`eval echo ${sysconfdir}` ; D=`eval echo ${D}`
+E=`eval echo ${libexecdir}/ssh-askpass` ; E=`eval echo ${E}`
+F=`eval echo ${mandir}/${mansubdir}X` ; F=`eval echo ${F}`
+G=`eval echo ${piddir}` ; G=`eval echo ${G}`
+H=`eval echo ${PRIVSEP_PATH}` ; H=`eval echo ${H}`
+I=`eval echo ${user_path}` ; I=`eval echo ${I}`
+J=`eval echo ${superuser_path}` ; J=`eval echo ${J}`
+
+echo ""
+echo "OpenSSH has been configured with the following options:"
+echo " User binaries: $B"
+echo " System binaries: $C"
+echo " Configuration files: $D"
+echo " Askpass program: $E"
+echo " Manual pages: $F"
+echo " PID file: $G"
+echo " Privilege separation chroot path: $H"
+if test "x$external_path_file" = "x/etc/login.conf" ; then
+echo " At runtime, sshd will use the path defined in $external_path_file"
+echo " Make sure the path to scp is present, otherwise scp will not work"
+else
+echo " sshd default user PATH: $I"
+ if test ! -z "$external_path_file"; then
+echo " (If PATH is set in $external_path_file it will be used instead. If"
+echo " used, ensure the path to scp is present, otherwise scp will not work.)"
+ fi
+fi
+if test ! -z "$superuser_path" ; then
+echo " sshd superuser user PATH: $J"
+fi
+echo " Manpage format: $MANTYPE"
+echo " PAM support: $PAM_MSG"
+echo " OSF SIA support: $SIA_MSG"
+echo " KerberosV support: $KRB5_MSG"
+echo " SELinux support: $SELINUX_MSG"
+echo " TCP Wrappers support: $TCPW_MSG"
+echo " MD5 password support: $MD5_MSG"
+echo " libedit support: $LIBEDIT_MSG"
+echo " libldns support: $LDNS_MSG"
+echo " Solaris process contract support: $SPC_MSG"
+echo " Solaris project support: $SP_MSG"
+echo " Solaris privilege support: $SPP_MSG"
+echo " IP address in \$DISPLAY hack: $DISPLAY_HACK_MSG"
+echo " Translate v4 in v6 hack: $IPV4_IN6_HACK_MSG"
+echo " BSD Auth support: $BSD_AUTH_MSG"
+echo " Random number source: $RAND_MSG"
+echo " Privsep sandbox style: $SANDBOX_STYLE"
+echo " PKCS#11 support: $enable_pkcs11"
+echo " U2F/FIDO support: $enable_sk"
+
+echo ""
+
+echo " Host: ${host}"
+echo " Compiler: ${CC}"
+echo " Compiler flags: ${CFLAGS}"
+echo "Preprocessor flags: ${CPPFLAGS}"
+echo " Linker flags: ${LDFLAGS}"
+echo " Libraries: ${LIBS}"
+if test ! -z "${SSHDLIBS}"; then
+echo " +for sshd: ${SSHDLIBS}"
+fi
+
+echo ""
+
+if test "x$MAKE_PACKAGE_SUPPORTED" = "xyes" ; then
+ echo "SVR4 style packages are supported with \"make package\""
+ echo ""
+fi
+
+if test "x$PAM_MSG" = "xyes" ; then
+ echo "PAM is enabled. You may need to install a PAM control file "
+ echo "for sshd, otherwise password authentication may fail. "
+ echo "Example PAM control files can be found in the contrib/ "
+ echo "subdirectory"
+ echo ""
+fi
+
+if test ! -z "$NO_PEERCHECK" ; then
+ echo "WARNING: the operating system that you are using does not"
+ echo "appear to support getpeereid(), getpeerucred() or the"
+ echo "SO_PEERCRED getsockopt() option. These facilities are used to"
+ echo "enforce security checks to prevent unauthorised connections to"
+ echo "ssh-agent. Their absence increases the risk that a malicious"
+ echo "user can connect to your agent."
+ echo ""
+fi
+
+if test "$AUDIT_MODULE" = "bsm" ; then
+ echo "WARNING: BSM audit support is currently considered EXPERIMENTAL."
+ echo "See the Solaris section in README.platform for details."
+fi
Index: openssh-8.5p1-new/sshd.8
===================================================================
--- openssh-8.5p1-new/sshd.8 (nonexistent)
+++ openssh-8.5p1-new/sshd.8 (revision 5)
@@ -0,0 +1,1027 @@
+.\"
+.\" Author: Tatu Ylonen <ylo@cs.hut.fi>
+.\" Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+.\" All rights reserved
+.\"
+.\" As far as I am concerned, the code I have written for this software
+.\" can be used freely for any purpose. Any derived versions of this
+.\" software must be clearly marked as such, and if the derived work is
+.\" incompatible with the protocol description in the RFC file, it must be
+.\" called by a name other than "ssh" or "Secure Shell".
+.\"
+.\" Copyright (c) 1999,2000 Markus Friedl. All rights reserved.
+.\" Copyright (c) 1999 Aaron Campbell. All rights reserved.
+.\" Copyright (c) 1999 Theo de Raadt. All rights reserved.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\" notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\" notice, this list of conditions and the following disclaimer in the
+.\" documentation and/or other materials provided with the distribution.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+.\"
+.\" $OpenBSD: sshd.8,v 1.313 2020/08/27 01:07:10 djm Exp $
+.Dd $Mdocdate: August 27 2020 $
+.Dt SSHD 8
+.Os
+.Sh NAME
+.Nm sshd
+.Nd OpenSSH daemon
+.Sh SYNOPSIS
+.Nm sshd
+.Bk -words
+.Op Fl 46DdeiqTt
+.Op Fl C Ar connection_spec
+.Op Fl c Ar host_certificate_file
+.Op Fl E Ar log_file
+.Op Fl f Ar config_file
+.Op Fl g Ar login_grace_time
+.Op Fl h Ar host_key_file
+.Op Fl o Ar option
+.Op Fl p Ar port
+.Op Fl u Ar len
+.Ek
+.Sh DESCRIPTION
+.Nm
+(OpenSSH Daemon) is the daemon program for
+.Xr ssh 1 .
+Together these programs replace rlogin and rsh,
+and provide secure encrypted communications between two untrusted hosts
+over an insecure network.
+.Pp
+.Nm
+listens for connections from clients.
+It is normally started at boot from
+.Pa /etc/rc .
+It forks a new
+daemon for each incoming connection.
+The forked daemons handle
+key exchange, encryption, authentication, command execution,
+and data exchange.
+.Pp
+.Nm
+can be configured using command-line options or a configuration file
+(by default
+.Xr sshd_config 5 ) ;
+command-line options override values specified in the
+configuration file.
+.Nm
+rereads its configuration file when it receives a hangup signal,
+.Dv SIGHUP ,
+by executing itself with the name and options it was started with, e.g.\&
+.Pa /usr/sbin/sshd .
+.Pp
+The options are as follows:
+.Bl -tag -width Ds
+.It Fl 4
+Forces
+.Nm
+to use IPv4 addresses only.
+.It Fl 6
+Forces
+.Nm
+to use IPv6 addresses only.
+.It Fl C Ar connection_spec
+Specify the connection parameters to use for the
+.Fl T
+extended test mode.
+If provided, any
+.Cm Match
+directives in the configuration file that would apply are applied before the
+configuration is written to standard output.
+The connection parameters are supplied as keyword=value pairs and may be
+supplied in any order, either with multiple
+.Fl C
+options or as a comma-separated list.
+The keywords are
+.Dq addr,
+.Dq user ,
+.Dq host ,
+.Dq laddr ,
+.Dq lport ,
+and
+.Dq rdomain
+and correspond to source address, user, resolved source host name,
+local address, local port number and routing domain respectively.
+.It Fl c Ar host_certificate_file
+Specifies a path to a certificate file to identify
+.Nm
+during key exchange.
+The certificate file must match a host key file specified using the
+.Fl h
+option or the
+.Cm HostKey
+configuration directive.
+.It Fl D
+When this option is specified,
+.Nm
+will not detach and does not become a daemon.
+This allows easy monitoring of
+.Nm sshd .
+.It Fl d
+Debug mode.
+The server sends verbose debug output to standard error,
+and does not put itself in the background.
+The server also will not fork and will only process one connection.
+This option is only intended for debugging for the server.
+Multiple
+.Fl d
+options increase the debugging level.
+Maximum is 3.
+.It Fl E Ar log_file
+Append debug logs to
+.Ar log_file
+instead of the system log.
+.It Fl e
+Write debug logs to standard error instead of the system log.
+.It Fl f Ar config_file
+Specifies the name of the configuration file.
+The default is
+.Pa /etc/ssh/sshd_config .
+.Nm
+refuses to start if there is no configuration file.
+.It Fl g Ar login_grace_time
+Gives the grace time for clients to authenticate themselves (default
+120 seconds).
+If the client fails to authenticate the user within
+this many seconds, the server disconnects and exits.
+A value of zero indicates no limit.
+.It Fl h Ar host_key_file
+Specifies a file from which a host key is read.
+This option must be given if
+.Nm
+is not run as root (as the normal
+host key files are normally not readable by anyone but root).
+The default is
+.Pa /etc/ssh/ssh_host_ecdsa_key ,
+.Pa /etc/ssh/ssh_host_ed25519_key
+and
+.Pa /etc/ssh/ssh_host_rsa_key .
+It is possible to have multiple host key files for
+the different host key algorithms.
+.It Fl i
+Specifies that
+.Nm
+is being run from
+.Xr inetd 8 .
+.It Fl o Ar option
+Can be used to give options in the format used in the configuration file.
+This is useful for specifying options for which there is no separate
+command-line flag.
+For full details of the options, and their values, see
+.Xr sshd_config 5 .
+.It Fl p Ar port
+Specifies the port on which the server listens for connections
+(default 22).
+Multiple port options are permitted.
+Ports specified in the configuration file with the
+.Cm Port
+option are ignored when a command-line port is specified.
+Ports specified using the
+.Cm ListenAddress
+option override command-line ports.
+.It Fl q
+Quiet mode.
+Nothing is sent to the system log.
+Normally the beginning,
+authentication, and termination of each connection is logged.
+.It Fl T
+Extended test mode.
+Check the validity of the configuration file, output the effective configuration
+to stdout and then exit.
+Optionally,
+.Cm Match
+rules may be applied by specifying the connection parameters using one or more
+.Fl C
+options.
+.It Fl t
+Test mode.
+Only check the validity of the configuration file and sanity of the keys.
+This is useful for updating
+.Nm
+reliably as configuration options may change.
+.It Fl u Ar len
+This option is used to specify the size of the field
+in the
+.Li utmp
+structure that holds the remote host name.
+If the resolved host name is longer than
+.Ar len ,
+the dotted decimal value will be used instead.
+This allows hosts with very long host names that
+overflow this field to still be uniquely identified.
+Specifying
+.Fl u0
+indicates that only dotted decimal addresses
+should be put into the
+.Pa utmp
+file.
+.Fl u0
+may also be used to prevent
+.Nm
+from making DNS requests unless the authentication
+mechanism or configuration requires it.
+Authentication mechanisms that may require DNS include
+.Cm HostbasedAuthentication
+and using a
+.Cm from="pattern-list"
+option in a key file.
+Configuration options that require DNS include using a
+USER@HOST pattern in
+.Cm AllowUsers
+or
+.Cm DenyUsers .
+.El
+.Sh AUTHENTICATION
+The OpenSSH SSH daemon supports SSH protocol 2 only.
+Each host has a host-specific key,
+used to identify the host.
+Whenever a client connects, the daemon responds with its public
+host key.
+The client compares the
+host key against its own database to verify that it has not changed.
+Forward secrecy is provided through a Diffie-Hellman key agreement.
+This key agreement results in a shared session key.
+The rest of the session is encrypted using a symmetric cipher.
+The client selects the encryption algorithm
+to use from those offered by the server.
+Additionally, session integrity is provided
+through a cryptographic message authentication code (MAC).
+.Pp
+Finally, the server and the client enter an authentication dialog.
+The client tries to authenticate itself using
+host-based authentication,
+public key authentication,
+challenge-response authentication,
+or password authentication.
+.Pp
+Regardless of the authentication type, the account is checked to
+ensure that it is accessible. An account is not accessible if it is
+locked, listed in
+.Cm DenyUsers
+or its group is listed in
+.Cm DenyGroups
+\&. The definition of a locked account is system dependent. Some platforms
+have their own account database (eg AIX) and some modify the passwd field (
+.Ql \&*LK\&*
+on Solaris and UnixWare,
+.Ql \&*
+on HP-UX, containing
+.Ql Nologin
+on Tru64,
+a leading
+.Ql \&*LOCKED\&*
+on FreeBSD and a leading
+.Ql \&!
+on most Linuxes).
+If there is a requirement to disable password authentication
+for the account while allowing still public-key, then the passwd field
+should be set to something other than these values (eg
+.Ql NP
+or
+.Ql \&*NP\&*
+).
+.Pp
+If the client successfully authenticates itself, a dialog for
+preparing the session is entered.
+At this time the client may request
+things like allocating a pseudo-tty, forwarding X11 connections,
+forwarding TCP connections, or forwarding the authentication agent
+connection over the secure channel.
+.Pp
+After this, the client either requests a shell or execution of a command.
+The sides then enter session mode.
+In this mode, either side may send
+data at any time, and such data is forwarded to/from the shell or
+command on the server side, and the user terminal in the client side.
+.Pp
+When the user program terminates and all forwarded X11 and other
+connections have been closed, the server sends command exit status to
+the client, and both sides exit.
+.Sh LOGIN PROCESS
+When a user successfully logs in,
+.Nm
+does the following:
+.Bl -enum -offset indent
+.It
+If the login is on a tty, and no command has been specified,
+prints last login time and
+.Pa /etc/motd
+(unless prevented in the configuration file or by
+.Pa ~/.hushlogin ;
+see the
+.Sx FILES
+section).
+.It
+If the login is on a tty, records login time.
+.It
+Checks
+.Pa /etc/nologin ;
+if it exists, prints contents and quits
+(unless root).
+.It
+Changes to run with normal user privileges.
+.It
+Sets up basic environment.
+.It
+Reads the file
+.Pa ~/.ssh/environment ,
+if it exists, and users are allowed to change their environment.
+See the
+.Cm PermitUserEnvironment
+option in
+.Xr sshd_config 5 .
+.It
+Changes to user's home directory.
+.It
+If
+.Pa ~/.ssh/rc
+exists and the
+.Xr sshd_config 5
+.Cm PermitUserRC
+option is set, runs it; else if
+.Pa /etc/ssh/sshrc
+exists, runs
+it; otherwise runs xauth.
+The
+.Dq rc
+files are given the X11
+authentication protocol and cookie in standard input.
+See
+.Sx SSHRC ,
+below.
+.It
+Runs user's shell or command.
+All commands are run under the user's login shell as specified in the
+system password database.
+.El
+.Sh SSHRC
+If the file
+.Pa ~/.ssh/rc
+exists,
+.Xr sh 1
+runs it after reading the
+environment files but before starting the user's shell or command.
+It must not produce any output on stdout; stderr must be used
+instead.
+If X11 forwarding is in use, it will receive the "proto cookie" pair in
+its standard input (and
+.Ev DISPLAY
+in its environment).
+The script must call
+.Xr xauth 1
+because
+.Nm
+will not run xauth automatically to add X11 cookies.
+.Pp
+The primary purpose of this file is to run any initialization routines
+which may be needed before the user's home directory becomes
+accessible; AFS is a particular example of such an environment.
+.Pp
+This file will probably contain some initialization code followed by
+something similar to:
+.Bd -literal -offset 3n
+if read proto cookie && [ -n "$DISPLAY" ]; then
+ if [ `echo $DISPLAY | cut -c1-10` = 'localhost:' ]; then
+ # X11UseLocalhost=yes
+ echo add unix:`echo $DISPLAY |
+ cut -c11-` $proto $cookie
+ else
+ # X11UseLocalhost=no
+ echo add $DISPLAY $proto $cookie
+ fi | xauth -q -
+fi
+.Ed
+.Pp
+If this file does not exist,
+.Pa /etc/ssh/sshrc
+is run, and if that
+does not exist either, xauth is used to add the cookie.
+.Sh AUTHORIZED_KEYS FILE FORMAT
+.Cm AuthorizedKeysFile
+specifies the files containing public keys for
+public key authentication;
+if this option is not specified, the default is
+.Pa ~/.ssh/authorized_keys
+and
+.Pa ~/.ssh/authorized_keys2 .
+Each line of the file contains one
+key (empty lines and lines starting with a
+.Ql #
+are ignored as
+comments).
+Public keys consist of the following space-separated fields:
+options, keytype, base64-encoded key, comment.
+The options field is optional.
+The supported key types are:
+.Pp
+.Bl -item -compact -offset indent
+.It
+sk-ecdsa-sha2-nistp256@openssh.com
+.It
+ecdsa-sha2-nistp256
+.It
+ecdsa-sha2-nistp384
+.It
+ecdsa-sha2-nistp521
+.It
+sk-ssh-ed25519@openssh.com
+.It
+ssh-ed25519
+.It
+ssh-dss
+.It
+ssh-rsa
+.El
+.Pp
+The comment field is not used for anything (but may be convenient for the
+user to identify the key).
+.Pp
+Note that lines in this file can be several hundred bytes long
+(because of the size of the public key encoding) up to a limit of
+8 kilobytes, which permits RSA keys up to 16 kilobits.
+You don't want to type them in; instead, copy the
+.Pa id_dsa.pub ,
+.Pa id_ecdsa.pub ,
+.Pa id_ecdsa_sk.pub ,
+.Pa id_ed25519.pub ,
+.Pa id_ed25519_sk.pub ,
+or the
+.Pa id_rsa.pub
+file and edit it.
+.Pp
+.Nm
+enforces a minimum RSA key modulus size of 1024 bits.
+.Pp
+The options (if present) consist of comma-separated option
+specifications.
+No spaces are permitted, except within double quotes.
+The following option specifications are supported (note
+that option keywords are case-insensitive):
+.Bl -tag -width Ds
+.It Cm agent-forwarding
+Enable authentication agent forwarding previously disabled by the
+.Cm restrict
+option.
+.It Cm cert-authority
+Specifies that the listed key is a certification authority (CA) that is
+trusted to validate signed certificates for user authentication.
+.Pp
+Certificates may encode access restrictions similar to these key options.
+If both certificate restrictions and key options are present, the most
+restrictive union of the two is applied.
+.It Cm command="command"
+Specifies that the command is executed whenever this key is used for
+authentication.
+The command supplied by the user (if any) is ignored.
+The command is run on a pty if the client requests a pty;
+otherwise it is run without a tty.
+If an 8-bit clean channel is required,
+one must not request a pty or should specify
+.Cm no-pty .
+A quote may be included in the command by quoting it with a backslash.
+.Pp
+This option might be useful
+to restrict certain public keys to perform just a specific operation.
+An example might be a key that permits remote backups but nothing else.
+Note that the client may specify TCP and/or X11
+forwarding unless they are explicitly prohibited, e.g. using the
+.Cm restrict
+key option.
+.Pp
+The command originally supplied by the client is available in the
+.Ev SSH_ORIGINAL_COMMAND
+environment variable.
+Note that this option applies to shell, command or subsystem execution.
+Also note that this command may be superseded by a
+.Xr sshd_config 5
+.Cm ForceCommand
+directive.
+.Pp
+If a command is specified and a forced-command is embedded in a certificate
+used for authentication, then the certificate will be accepted only if the
+two commands are identical.
+.It Cm environment="NAME=value"
+Specifies that the string is to be added to the environment when
+logging in using this key.
+Environment variables set this way
+override other default environment values.
+Multiple options of this type are permitted.
+Environment processing is disabled by default and is
+controlled via the
+.Cm PermitUserEnvironment
+option.
+.It Cm expiry-time="timespec"
+Specifies a time after which the key will not be accepted.
+The time may be specified as a YYYYMMDD date or a YYYYMMDDHHMM[SS] time
+in the system time-zone.
+.It Cm from="pattern-list"
+Specifies that in addition to public key authentication, either the canonical
+name of the remote host or its IP address must be present in the
+comma-separated list of patterns.
+See PATTERNS in
+.Xr ssh_config 5
+for more information on patterns.
+.Pp
+In addition to the wildcard matching that may be applied to hostnames or
+addresses, a
+.Cm from
+stanza may match IP addresses using CIDR address/masklen notation.
+.Pp
+The purpose of this option is to optionally increase security: public key
+authentication by itself does not trust the network or name servers or
+anything (but the key); however, if somebody somehow steals the key, the key
+permits an intruder to log in from anywhere in the world.
+This additional option makes using a stolen key more difficult (name
+servers and/or routers would have to be compromised in addition to
+just the key).
+.It Cm no-agent-forwarding
+Forbids authentication agent forwarding when this key is used for
+authentication.
+.It Cm no-port-forwarding
+Forbids TCP forwarding when this key is used for authentication.
+Any port forward requests by the client will return an error.
+This might be used, e.g. in connection with the
+.Cm command
+option.
+.It Cm no-pty
+Prevents tty allocation (a request to allocate a pty will fail).
+.It Cm no-user-rc
+Disables execution of
+.Pa ~/.ssh/rc .
+.It Cm no-X11-forwarding
+Forbids X11 forwarding when this key is used for authentication.
+Any X11 forward requests by the client will return an error.
+.It Cm permitlisten="[host:]port"
+Limit remote port forwarding with the
+.Xr ssh 1
+.Fl R
+option such that it may only listen on the specified host (optional) and port.
+IPv6 addresses can be specified by enclosing the address in square brackets.
+Multiple
+.Cm permitlisten
+options may be applied separated by commas.
+Hostnames may include wildcards as described in the PATTERNS section in
+.Xr ssh_config 5 .
+A port specification of
+.Cm *
+matches any port.
+Note that the setting of
+.Cm GatewayPorts
+may further restrict listen addresses.
+Note that
+.Xr ssh 1
+will send a hostname of
+.Dq localhost
+if a listen host was not specified when the forwarding was requested, and
+that this name is treated differently to the explicit localhost addresses
+.Dq 127.0.0.1
+and
+.Dq ::1 .
+.It Cm permitopen="host:port"
+Limit local port forwarding with the
+.Xr ssh 1
+.Fl L
+option such that it may only connect to the specified host and port.
+IPv6 addresses can be specified by enclosing the address in square brackets.
+Multiple
+.Cm permitopen
+options may be applied separated by commas.
+No pattern matching or name lookup is performed on the
+specified hostnames, they must be literal host names and/or addresses.
+A port specification of
+.Cm *
+matches any port.
+.It Cm port-forwarding
+Enable port forwarding previously disabled by the
+.Cm restrict
+option.
+.It Cm principals="principals"
+On a
+.Cm cert-authority
+line, specifies allowed principals for certificate authentication as a
+comma-separated list.
+At least one name from the list must appear in the certificate's
+list of principals for the certificate to be accepted.
+This option is ignored for keys that are not marked as trusted certificate
+signers using the
+.Cm cert-authority
+option.
+.It Cm pty
+Permits tty allocation previously disabled by the
+.Cm restrict
+option.
+.It Cm no-touch-required
+Do not require demonstration of user presence
+for signatures made using this key.
+This option only makes sense for the FIDO authenticator algorithms
+.Cm ecdsa-sk
+and
+.Cm ed25519-sk .
+.It Cm verify-required
+Require that signatures made using this key attest that they verified
+the user, e.g. via a PIN.
+This option only makes sense for the FIDO authenticator algorithms
+.Cm ecdsa-sk
+and
+.Cm ed25519-sk .
+.It Cm restrict
+Enable all restrictions, i.e. disable port, agent and X11 forwarding,
+as well as disabling PTY allocation
+and execution of
+.Pa ~/.ssh/rc .
+If any future restriction capabilities are added to authorized_keys files
+they will be included in this set.
+.It Cm tunnel="n"
+Force a
+.Xr tun 4
+device on the server.
+Without this option, the next available device will be used if
+the client requests a tunnel.
+.It Cm user-rc
+Enables execution of
+.Pa ~/.ssh/rc
+previously disabled by the
+.Cm restrict
+option.
+.It Cm X11-forwarding
+Permits X11 forwarding previously disabled by the
+.Cm restrict
+option.
+.El
+.Pp
+An example authorized_keys file:
+.Bd -literal -offset 3n
+# Comments allowed at start of line
+ssh-rsa AAAAB3Nza...LiPk== user@example.net
+from="*.sales.example.net,!pc.sales.example.net" ssh-rsa
+AAAAB2...19Q== john@example.net
+command="dump /home",no-pty,no-port-forwarding ssh-rsa
+AAAAC3...51R== example.net
+permitopen="192.0.2.1:80",permitopen="192.0.2.2:25" ssh-rsa
+AAAAB5...21S==
+permitlisten="localhost:8080",permitopen="localhost:22000" ssh-rsa
+AAAAB5...21S==
+tunnel="0",command="sh /etc/netstart tun0" ssh-rsa AAAA...==
+jane@example.net
+restrict,command="uptime" ssh-rsa AAAA1C8...32Tv==
+user@example.net
+restrict,pty,command="nethack" ssh-rsa AAAA1f8...IrrC5==
+user@example.net
+no-touch-required sk-ecdsa-sha2-nistp256@openssh.com AAAAInN...Ko==
+user@example.net
+.Ed
+.Sh SSH_KNOWN_HOSTS FILE FORMAT
+The
+.Pa /etc/ssh/ssh_known_hosts
+and
+.Pa ~/.ssh/known_hosts
+files contain host public keys for all known hosts.
+The global file should
+be prepared by the administrator (optional), and the per-user file is
+maintained automatically: whenever the user connects to an unknown host,
+its key is added to the per-user file.
+.Pp
+Each line in these files contains the following fields: markers (optional),
+hostnames, keytype, base64-encoded key, comment.
+The fields are separated by spaces.
+.Pp
+The marker is optional, but if it is present then it must be one of
+.Dq @cert-authority ,
+to indicate that the line contains a certification authority (CA) key,
+or
+.Dq @revoked ,
+to indicate that the key contained on the line is revoked and must not ever
+be accepted.
+Only one marker should be used on a key line.
+.Pp
+Hostnames is a comma-separated list of patterns
+.Pf ( Ql *
+and
+.Ql \&?
+act as
+wildcards); each pattern in turn is matched against the host name.
+When
+.Nm sshd
+is authenticating a client, such as when using
+.Cm HostbasedAuthentication ,
+this will be the canonical client host name.
+When
+.Xr ssh 1
+is authenticating a server, this will be the host name
+given by the user, the value of the
+.Xr ssh 1
+.Cm HostkeyAlias
+if it was specified, or the canonical server hostname if the
+.Xr ssh 1
+.Cm CanonicalizeHostname
+option was used.
+.Pp
+A pattern may also be preceded by
+.Ql \&!
+to indicate negation: if the host name matches a negated
+pattern, it is not accepted (by that line) even if it matched another
+pattern on the line.
+A hostname or address may optionally be enclosed within
+.Ql \&[
+and
+.Ql \&]
+brackets then followed by
+.Ql \&:
+and a non-standard port number.
+.Pp
+Alternately, hostnames may be stored in a hashed form which hides host names
+and addresses should the file's contents be disclosed.
+Hashed hostnames start with a
+.Ql |
+character.
+Only one hashed hostname may appear on a single line and none of the above
+negation or wildcard operators may be applied.
+.Pp
+The keytype and base64-encoded key are taken directly from the host key; they
+can be obtained, for example, from
+.Pa /etc/ssh/ssh_host_rsa_key.pub .
+The optional comment field continues to the end of the line, and is not used.
+.Pp
+Lines starting with
+.Ql #
+and empty lines are ignored as comments.
+.Pp
+When performing host authentication, authentication is accepted if any
+matching line has the proper key; either one that matches exactly or,
+if the server has presented a certificate for authentication, the key
+of the certification authority that signed the certificate.
+For a key to be trusted as a certification authority, it must use the
+.Dq @cert-authority
+marker described above.
+.Pp
+The known hosts file also provides a facility to mark keys as revoked,
+for example when it is known that the associated private key has been
+stolen.
+Revoked keys are specified by including the
+.Dq @revoked
+marker at the beginning of the key line, and are never accepted for
+authentication or as certification authorities, but instead will
+produce a warning from
+.Xr ssh 1
+when they are encountered.
+.Pp
+It is permissible (but not
+recommended) to have several lines or different host keys for the same
+names.
+This will inevitably happen when short forms of host names
+from different domains are put in the file.
+It is possible
+that the files contain conflicting information; authentication is
+accepted if valid information can be found from either file.
+.Pp
+Note that the lines in these files are typically hundreds of characters
+long, and you definitely don't want to type in the host keys by hand.
+Rather, generate them by a script,
+.Xr ssh-keyscan 1
+or by taking, for example,
+.Pa /etc/ssh/ssh_host_rsa_key.pub
+and adding the host names at the front.
+.Xr ssh-keygen 1
+also offers some basic automated editing for
+.Pa ~/.ssh/known_hosts
+including removing hosts matching a host name and converting all host
+names to their hashed representations.
+.Pp
+An example ssh_known_hosts file:
+.Bd -literal -offset 3n
+# Comments allowed at start of line
+closenet,...,192.0.2.53 1024 37 159...93 closenet.example.net
+cvs.example.net,192.0.2.10 ssh-rsa AAAA1234.....=
+# A hashed hostname
+|1|JfKTdBh7rNbXkVAQCRp4OQoPfmI=|USECr3SWf1JUPsms5AqfD5QfxkM= ssh-rsa
+AAAA1234.....=
+# A revoked key
+@revoked * ssh-rsa AAAAB5W...
+# A CA key, accepted for any host in *.mydomain.com or *.mydomain.org
+@cert-authority *.mydomain.org,*.mydomain.com ssh-rsa AAAAB5W...
+.Ed
+.Sh FILES
+.Bl -tag -width Ds -compact
+.It Pa ~/.hushlogin
+This file is used to suppress printing the last login time and
+.Pa /etc/motd ,
+if
+.Cm PrintLastLog
+and
+.Cm PrintMotd ,
+respectively,
+are enabled.
+It does not suppress printing of the banner specified by
+.Cm Banner .
+.Pp
+.It Pa ~/.rhosts
+This file is used for host-based authentication (see
+.Xr ssh 1
+for more information).
+On some machines this file may need to be
+world-readable if the user's home directory is on an NFS partition,
+because
+.Nm
+reads it as root.
+Additionally, this file must be owned by the user,
+and must not have write permissions for anyone else.
+The recommended
+permission for most machines is read/write for the user, and not
+accessible by others.
+.Pp
+.It Pa ~/.shosts
+This file is used in exactly the same way as
+.Pa .rhosts ,
+but allows host-based authentication without permitting login with
+rlogin/rsh.
+.Pp
+.It Pa ~/.ssh/
+This directory is the default location for all user-specific configuration
+and authentication information.
+There is no general requirement to keep the entire contents of this directory
+secret, but the recommended permissions are read/write/execute for the user,
+and not accessible by others.
+.Pp
+.It Pa ~/.ssh/authorized_keys
+Lists the public keys (DSA, ECDSA, Ed25519, RSA)
+that can be used for logging in as this user.
+The format of this file is described above.
+The content of the file is not highly sensitive, but the recommended
+permissions are read/write for the user, and not accessible by others.
+.Pp
+If this file, the
+.Pa ~/.ssh
+directory, or the user's home directory are writable
+by other users, then the file could be modified or replaced by unauthorized
+users.
+In this case,
+.Nm
+will not allow it to be used unless the
+.Cm StrictModes
+option has been set to
+.Dq no .
+.Pp
+.It Pa ~/.ssh/environment
+This file is read into the environment at login (if it exists).
+It can only contain empty lines, comment lines (that start with
+.Ql # ) ,
+and assignment lines of the form name=value.
+The file should be writable
+only by the user; it need not be readable by anyone else.
+Environment processing is disabled by default and is
+controlled via the
+.Cm PermitUserEnvironment
+option.
+.Pp
+.It Pa ~/.ssh/known_hosts
+Contains a list of host keys for all hosts the user has logged into
+that are not already in the systemwide list of known host keys.
+The format of this file is described above.
+This file should be writable only by root/the owner and
+can, but need not be, world-readable.
+.Pp
+.It Pa ~/.ssh/rc
+Contains initialization routines to be run before
+the user's home directory becomes accessible.
+This file should be writable only by the user, and need not be
+readable by anyone else.
+.Pp
+.It Pa /etc/hosts.allow
+.It Pa /etc/hosts.deny
+Access controls that should be enforced by tcp-wrappers are defined here.
+Further details are described in
+.Xr hosts_access 5 .
+.Pp
+.It Pa /etc/hosts.equiv
+This file is for host-based authentication (see
+.Xr ssh 1 ) .
+It should only be writable by root.
+.Pp
+.It Pa /etc/moduli
+Contains Diffie-Hellman groups used for the "Diffie-Hellman Group Exchange"
+key exchange method.
+The file format is described in
+.Xr moduli 5 .
+If no usable groups are found in this file then fixed internal groups will
+be used.
+.Pp
+.It Pa /etc/motd
+See
+.Xr motd 5 .
+.Pp
+.It Pa /etc/nologin
+If this file exists,
+.Nm
+refuses to let anyone except root log in.
+The contents of the file
+are displayed to anyone trying to log in, and non-root connections are
+refused.
+The file should be world-readable.
+.Pp
+.It Pa /etc/shosts.equiv
+This file is used in exactly the same way as
+.Pa hosts.equiv ,
+but allows host-based authentication without permitting login with
+rlogin/rsh.
+.Pp
+.It Pa /etc/ssh/ssh_host_ecdsa_key
+.It Pa /etc/ssh/ssh_host_ed25519_key
+.It Pa /etc/ssh/ssh_host_rsa_key
+These files contain the private parts of the host keys.
+These files should only be owned by root, readable only by root, and not
+accessible to others.
+Note that
+.Nm
+does not start if these files are group/world-accessible.
+.Pp
+.It Pa /etc/ssh/ssh_host_ecdsa_key.pub
+.It Pa /etc/ssh/ssh_host_ed25519_key.pub
+.It Pa /etc/ssh/ssh_host_rsa_key.pub
+These files contain the public parts of the host keys.
+These files should be world-readable but writable only by
+root.
+Their contents should match the respective private parts.
+These files are not
+really used for anything; they are provided for the convenience of
+the user so their contents can be copied to known hosts files.
+These files are created using
+.Xr ssh-keygen 1 .
+.Pp
+.It Pa /etc/ssh/ssh_known_hosts
+Systemwide list of known host keys.
+This file should be prepared by the
+system administrator to contain the public host keys of all machines in the
+organization.
+The format of this file is described above.
+This file should be writable only by root/the owner and
+should be world-readable.
+.Pp
+.It Pa /etc/ssh/sshd_config
+Contains configuration data for
+.Nm sshd .
+The file format and configuration options are described in
+.Xr sshd_config 5 .
+.Pp
+.It Pa /etc/ssh/sshrc
+Similar to
+.Pa ~/.ssh/rc ,
+it can be used to specify
+machine-specific login-time initializations globally.
+This file should be writable only by root, and should be world-readable.
+.Pp
+.It Pa /var/empty
+.Xr chroot 2
+directory used by
+.Nm
+during privilege separation in the pre-authentication phase.
+The directory should not contain any files and must be owned by root
+and not group or world-writable.
+.Pp
+.It Pa /var/run/sshd.pid
+Contains the process ID of the
+.Nm
+listening for connections (if there are several daemons running
+concurrently for different ports, this contains the process ID of the one
+started last).
+The content of this file is not sensitive; it can be world-readable.
+.El
+.Sh SEE ALSO
+.Xr scp 1 ,
+.Xr sftp 1 ,
+.Xr ssh 1 ,
+.Xr ssh-add 1 ,
+.Xr ssh-agent 1 ,
+.Xr ssh-keygen 1 ,
+.Xr ssh-keyscan 1 ,
+.Xr chroot 2 ,
+.Xr hosts_access 5 ,
+.Xr login.conf 5 ,
+.Xr moduli 5 ,
+.Xr sshd_config 5 ,
+.Xr inetd 8 ,
+.Xr sftp-server 8
+.Sh AUTHORS
+OpenSSH is a derivative of the original and free
+ssh 1.2.12 release by Tatu Ylonen.
+Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
+Theo de Raadt and Dug Song
+removed many bugs, re-added newer features and
+created OpenSSH.
+Markus Friedl contributed the support for SSH
+protocol versions 1.5 and 2.0.
+Niels Provos and Markus Friedl contributed support
+for privilege separation.
Index: openssh-8.5p1-new/sshd.c
===================================================================
--- openssh-8.5p1-new/sshd.c (nonexistent)
+++ openssh-8.5p1-new/sshd.c (revision 5)
@@ -0,0 +1,2452 @@
+/* $OpenBSD: sshd.c,v 1.570 2021/02/05 02:20:23 dtucker Exp $ */
+/*
+ * Author: Tatu Ylonen <ylo@cs.hut.fi>
+ * Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
+ * All rights reserved
+ * This program is the ssh daemon. It listens for connections from clients,
+ * and performs authentication, executes use commands or shell, and forwards
+ * information to/from the application to the user client over an encrypted
+ * connection. This can also handle forwarding of X11, TCP/IP, and
+ * authentication agent connections.
+ *
+ * As far as I am concerned, the code I have written for this software
+ * can be used freely for any purpose. Any derived versions of this
+ * software must be clearly marked as such, and if the derived work is
+ * incompatible with the protocol description in the RFC file, it must be
+ * called by a name other than "ssh" or "Secure Shell".
+ *
+ * SSH2 implementation:
+ * Privilege Separation:
+ *
+ * Copyright (c) 2000, 2001, 2002 Markus Friedl. All rights reserved.
+ * Copyright (c) 2002 Niels Provos. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "includes.h"
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#ifdef HAVE_SYS_STAT_H
+# include <sys/stat.h>
+#endif
+#ifdef HAVE_SYS_TIME_H
+# include <sys/time.h>
+#endif
+#include "openbsd-compat/sys-tree.h"
+#include "openbsd-compat/sys-queue.h"
+#include <sys/wait.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <netdb.h>
+#ifdef HAVE_PATHS_H
+#include <paths.h>
+#endif
+#include <grp.h>
+#include <pwd.h>
+#include <signal.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <limits.h>
+
+#ifdef WITH_OPENSSL
+#include <openssl/dh.h>
+#include <openssl/bn.h>
+#include <openssl/rand.h>
+#include "openbsd-compat/openssl-compat.h"
+#endif
+
+#ifdef HAVE_SECUREWARE
+#include <sys/security.h>
+#include <prot.h>
+#endif
+
+#include "xmalloc.h"
+#include "ssh.h"
+#include "ssh2.h"
+#include "sshpty.h"
+#include "packet.h"
+#include "log.h"
+#include "sshbuf.h"
+#include "misc.h"
+#include "match.h"
+#include "servconf.h"
+#include "uidswap.h"
+#include "compat.h"
+#include "cipher.h"
+#include "digest.h"
+#include "sshkey.h"
+#include "kex.h"
+#include "myproposal.h"
+#include "authfile.h"
+#include "pathnames.h"
+#include "atomicio.h"
+#include "canohost.h"
+#include "hostfile.h"
+#include "auth.h"
+#include "authfd.h"
+#include "msg.h"
+#include "dispatch.h"
+#include "channels.h"
+#include "session.h"
+#include "monitor.h"
+#ifdef GSSAPI
+#include "ssh-gss.h"
+#endif
+#include "monitor_wrap.h"
+#include "ssh-sandbox.h"
+#include "auth-options.h"
+#include "version.h"
+#include "ssherr.h"
+#include "sk-api.h"
+#include "srclimit.h"
+
+#ifdef LIBWRAP
+#include <tcpd.h>
+#include <syslog.h>
+int allow_severity;
+int deny_severity;
+#endif /* LIBWRAP */
+
+/* Re-exec fds */
+#define REEXEC_DEVCRYPTO_RESERVED_FD (STDERR_FILENO + 1)
+#define REEXEC_STARTUP_PIPE_FD (STDERR_FILENO + 2)
+#define REEXEC_CONFIG_PASS_FD (STDERR_FILENO + 3)
+#define REEXEC_MIN_FREE_FD (STDERR_FILENO + 4)
+
+extern char *__progname;
+
+/* Server configuration options. */
+ServerOptions options;
+
+/* Name of the server configuration file. */
+char *config_file_name = _PATH_SERVER_CONFIG_FILE;
+
+/*
+ * Debug mode flag. This can be set on the command line. If debug
+ * mode is enabled, extra debugging output will be sent to the system
+ * log, the daemon will not go to background, and will exit after processing
+ * the first connection.
+ */
+int debug_flag = 0;
+
+/*
+ * Indicating that the daemon should only test the configuration and keys.
+ * If test_flag > 1 ("-T" flag), then sshd will also dump the effective
+ * configuration, optionally using connection information provided by the
+ * "-C" flag.
+ */
+static int test_flag = 0;
+
+/* Flag indicating that the daemon is being started from inetd. */
+static int inetd_flag = 0;
+
+/* Flag indicating that sshd should not detach and become a daemon. */
+static int no_daemon_flag = 0;
+
+/* debug goes to stderr unless inetd_flag is set */
+static int log_stderr = 0;
+
+/* Saved arguments to main(). */
+static char **saved_argv;
+static int saved_argc;
+
+/* re-exec */
+static int rexeced_flag = 0;
+static int rexec_flag = 1;
+static int rexec_argc = 0;
+static char **rexec_argv;
+
+/*
+ * The sockets that the server is listening; this is used in the SIGHUP
+ * signal handler.
+ */
+#define MAX_LISTEN_SOCKS 16
+static int listen_socks[MAX_LISTEN_SOCKS];
+static int num_listen_socks = 0;
+
+/* Daemon's agent connection */
+int auth_sock = -1;
+static int have_agent = 0;
+
+/*
+ * Any really sensitive data in the application is contained in this
+ * structure. The idea is that this structure could be locked into memory so
+ * that the pages do not get written into swap. However, there are some
+ * problems. The private key contains BIGNUMs, and we do not (in principle)
+ * have access to the internals of them, and locking just the structure is
+ * not very useful. Currently, memory locking is not implemented.
+ */
+struct {
+ struct sshkey **host_keys; /* all private host keys */
+ struct sshkey **host_pubkeys; /* all public host keys */
+ struct sshkey **host_certificates; /* all public host certificates */
+ int have_ssh2_key;
+} sensitive_data;
+
+/* This is set to true when a signal is received. */
+static volatile sig_atomic_t received_sighup = 0;
+static volatile sig_atomic_t received_sigterm = 0;
+
+/* record remote hostname or ip */
+u_int utmp_len = HOST_NAME_MAX+1;
+
+/*
+ * startup_pipes/flags are used for tracking children of the listening sshd
+ * process early in their lifespans. This tracking is needed for three things:
+ *
+ * 1) Implementing the MaxStartups limit of concurrent unauthenticated
+ * connections.
+ * 2) Avoiding a race condition for SIGHUP processing, where child processes
+ * may have listen_socks open that could collide with main listener process
+ * after it restarts.
+ * 3) Ensuring that rexec'd sshd processes have received their initial state
+ * from the parent listen process before handling SIGHUP.
+ *
+ * Child processes signal that they have completed closure of the listen_socks
+ * and (if applicable) received their rexec state by sending a char over their
+ * sock. Child processes signal that authentication has completed by closing
+ * the sock (or by exiting).
+ */
+static int *startup_pipes = NULL;
+static int *startup_flags = NULL; /* Indicates child closed listener */
+static int startup_pipe = -1; /* in child */
+
+/* variables used for privilege separation */
+int use_privsep = -1;
+struct monitor *pmonitor = NULL;
+int privsep_is_preauth = 1;
+static int privsep_chroot = 1;
+
+/* global connection state and authentication contexts */
+Authctxt *the_authctxt = NULL;
+struct ssh *the_active_state;
+
+/* global key/cert auth options. XXX move to permanent ssh->authctxt? */
+struct sshauthopt *auth_opts = NULL;
+
+/* sshd_config buffer */
+struct sshbuf *cfg;
+
+/* Included files from the configuration file */
+struct include_list includes = TAILQ_HEAD_INITIALIZER(includes);
+
+/* message to be displayed after login */
+struct sshbuf *loginmsg;
+
+/* Unprivileged user */
+struct passwd *privsep_pw = NULL;
+
+/* Prototypes for various functions defined later in this file. */
+void destroy_sensitive_data(void);
+void demote_sensitive_data(void);
+static void do_ssh2_kex(struct ssh *);
+
+static char *listener_proctitle;
+
+/*
+ * Close all listening sockets
+ */
+static void
+close_listen_socks(void)
+{
+ int i;
+
+ for (i = 0; i < num_listen_socks; i++)
+ close(listen_socks[i]);
+ num_listen_socks = -1;
+}
+
+static void
+close_startup_pipes(void)
+{
+ int i;
+
+ if (startup_pipes)
+ for (i = 0; i < options.max_startups; i++)
+ if (startup_pipes[i] != -1)
+ close(startup_pipes[i]);
+}
+
+/*
+ * Signal handler for SIGHUP. Sshd execs itself when it receives SIGHUP;
+ * the effect is to reread the configuration file (and to regenerate
+ * the server key).
+ */
+
+/*ARGSUSED*/
+static void
+sighup_handler(int sig)
+{
+ received_sighup = 1;
+}
+
+/*
+ * Called from the main program after receiving SIGHUP.
+ * Restarts the server.
+ */
+static void
+sighup_restart(void)
+{
+ logit("Received SIGHUP; restarting.");
+ if (options.pid_file != NULL)
+ unlink(options.pid_file);
+ platform_pre_restart();
+ close_listen_socks();
+ close_startup_pipes();
+ ssh_signal(SIGHUP, SIG_IGN); /* will be restored after exec */
+ execv(saved_argv[0], saved_argv);
+ logit("RESTART FAILED: av[0]='%.100s', error: %.100s.", saved_argv[0],
+ strerror(errno));
+ exit(1);
+}
+
+/*
+ * Generic signal handler for terminating signals in the master daemon.
+ */
+/*ARGSUSED*/
+static void
+sigterm_handler(int sig)
+{
+ received_sigterm = sig;
+}
+
+/*
+ * SIGCHLD handler. This is called whenever a child dies. This will then
+ * reap any zombies left by exited children.
+ */
+/*ARGSUSED*/
+static void
+main_sigchld_handler(int sig)
+{
+ int save_errno = errno;
+ pid_t pid;
+ int status;
+
+ while ((pid = waitpid(-1, &status, WNOHANG)) > 0 ||
+ (pid == -1 && errno == EINTR))
+ ;
+ errno = save_errno;
+}
+
+/*
+ * Signal handler for the alarm after the login grace period has expired.
+ */
+/*ARGSUSED*/
+static void
+grace_alarm_handler(int sig)
+{
+ if (use_privsep && pmonitor != NULL && pmonitor->m_pid > 0)
+ kill(pmonitor->m_pid, SIGALRM);
+
+ /*
+ * Try to kill any processes that we have spawned, E.g. authorized
+ * keys command helpers.
+ */
+ if (getpgid(0) == getpid()) {
+ ssh_signal(SIGTERM, SIG_IGN);
+ kill(0, SIGTERM);
+ }
+
+ /* XXX pre-format ipaddr/port so we don't need to access active_state */
+ /* Log error and exit. */
+ sigdie("Timeout before authentication for %s port %d",
+ ssh_remote_ipaddr(the_active_state),
+ ssh_remote_port(the_active_state));
+}
+
+/* Destroy the host and server keys. They will no longer be needed. */
+void
+destroy_sensitive_data(void)
+{
+ u_int i;
+
+ for (i = 0; i < options.num_host_key_files; i++) {
+ if (sensitive_data.host_keys[i]) {
+ sshkey_free(sensitive_data.host_keys[i]);
+ sensitive_data.host_keys[i] = NULL;
+ }
+ if (sensitive_data.host_certificates[i]) {
+ sshkey_free(sensitive_data.host_certificates[i]);
+ sensitive_data.host_certificates[i] = NULL;
+ }
+ }
+}
+
+/* Demote private to public keys for network child */
+void
+demote_sensitive_data(void)
+{
+ struct sshkey *tmp;
+ u_int i;
+ int r;
+
+ for (i = 0; i < options.num_host_key_files; i++) {
+ if (sensitive_data.host_keys[i]) {
+ if ((r = sshkey_from_private(
+ sensitive_data.host_keys[i], &tmp)) != 0)
+ fatal_r(r, "could not demote host %s key",
+ sshkey_type(sensitive_data.host_keys[i]));
+ sshkey_free(sensitive_data.host_keys[i]);
+ sensitive_data.host_keys[i] = tmp;
+ }
+ /* Certs do not need demotion */
+ }
+}
+
+static void
+reseed_prngs(void)
+{
+ u_int32_t rnd[256];
+
+#ifdef WITH_OPENSSL
+ RAND_poll();
+#endif
+ arc4random_stir(); /* noop on recent arc4random() implementations */
+ arc4random_buf(rnd, sizeof(rnd)); /* let arc4random notice PID change */
+
+#ifdef WITH_OPENSSL
+ RAND_seed(rnd, sizeof(rnd));
+ /* give libcrypto a chance to notice the PID change */
+ if ((RAND_bytes((u_char *)rnd, 1)) != 1)
+ fatal("%s: RAND_bytes failed", __func__);
+#endif
+
+ explicit_bzero(rnd, sizeof(rnd));
+}
+
+static void
+privsep_preauth_child(void)
+{
+ gid_t gidset[1];
+
+ /* Enable challenge-response authentication for privilege separation */
+ privsep_challenge_enable();
+
+#ifdef GSSAPI
+ /* Cache supported mechanism OIDs for later use */
+ ssh_gssapi_prepare_supported_oids();
+#endif
+
+ reseed_prngs();
+
+ /* Demote the private keys to public keys. */
+ demote_sensitive_data();
+
+ /* Demote the child */
+ if (privsep_chroot) {
+ /* Change our root directory */
+ if (chroot(_PATH_PRIVSEP_CHROOT_DIR) == -1)
+ fatal("chroot(\"%s\"): %s", _PATH_PRIVSEP_CHROOT_DIR,
+ strerror(errno));
+ if (chdir("/") == -1)
+ fatal("chdir(\"/\"): %s", strerror(errno));
+
+ /* Drop our privileges */
+ debug3("privsep user:group %u:%u", (u_int)privsep_pw->pw_uid,
+ (u_int)privsep_pw->pw_gid);
+ gidset[0] = privsep_pw->pw_gid;
+ if (setgroups(1, gidset) == -1)
+ fatal("setgroups: %.100s", strerror(errno));
+ permanently_set_uid(privsep_pw);
+ }
+}
+
+static int
+privsep_preauth(struct ssh *ssh)
+{
+ int status, r;
+ pid_t pid;
+ struct ssh_sandbox *box = NULL;
+
+ /* Set up unprivileged child process to deal with network data */
+ pmonitor = monitor_init();
+ /* Store a pointer to the kex for later rekeying */
+ pmonitor->m_pkex = &ssh->kex;
+
+ if (use_privsep == PRIVSEP_ON)
+ box = ssh_sandbox_init(pmonitor);
+ pid = fork();
+ if (pid == -1) {
+ fatal("fork of unprivileged child failed");
+ } else if (pid != 0) {
+ debug2("Network child is on pid %ld", (long)pid);
+
+ pmonitor->m_pid = pid;
+ if (have_agent) {
+ r = ssh_get_authentication_socket(&auth_sock);
+ if (r != 0) {
+ error_r(r, "Could not get agent socket");
+ have_agent = 0;
+ }
+ }
+ if (box != NULL)
+ ssh_sandbox_parent_preauth(box, pid);
+ monitor_child_preauth(ssh, pmonitor);
+
+ /* Wait for the child's exit status */
+ while (waitpid(pid, &status, 0) == -1) {
+ if (errno == EINTR)
+ continue;
+ pmonitor->m_pid = -1;
+ fatal_f("waitpid: %s", strerror(errno));
+ }
+ privsep_is_preauth = 0;
+ pmonitor->m_pid = -1;
+ if (WIFEXITED(status)) {
+ if (WEXITSTATUS(status) != 0)
+ fatal_f("preauth child exited with status %d",
+ WEXITSTATUS(status));
+ } else if (WIFSIGNALED(status))
+ fatal_f("preauth child terminated by signal %d",
+ WTERMSIG(status));
+ if (box != NULL)
+ ssh_sandbox_parent_finish(box);
+ return 1;
+ } else {
+ /* child */
+ close(pmonitor->m_sendfd);
+ close(pmonitor->m_log_recvfd);
+
+ /* Arrange for logging to be sent to the monitor */
+ set_log_handler(mm_log_handler, pmonitor);
+
+ privsep_preauth_child();
+ setproctitle("%s", "[net]");
+ if (box != NULL)
+ ssh_sandbox_child(box);
+
+ return 0;
+ }
+}
+
+static void
+privsep_postauth(struct ssh *ssh, Authctxt *authctxt)
+{
+#ifdef DISABLE_FD_PASSING
+ if (1) {
+#else
+ if (authctxt->pw->pw_uid == 0) {
+#endif
+ /* File descriptor passing is broken or root login */
+ use_privsep = 0;
+ goto skip;
+ }
+
+ /* New socket pair */
+ monitor_reinit(pmonitor);
+
+ pmonitor->m_pid = fork();
+ if (pmonitor->m_pid == -1)
+ fatal("fork of unprivileged child failed");
+ else if (pmonitor->m_pid != 0) {
+ verbose("User child is on pid %ld", (long)pmonitor->m_pid);
+ sshbuf_reset(loginmsg);
+ monitor_clear_keystate(ssh, pmonitor);
+ monitor_child_postauth(ssh, pmonitor);
+
+ /* NEVERREACHED */
+ exit(0);
+ }
+
+ /* child */
+
+ close(pmonitor->m_sendfd);
+ pmonitor->m_sendfd = -1;
+
+ /* Demote the private keys to public keys. */
+ demote_sensitive_data();
+
+ reseed_prngs();
+
+ /* Drop privileges */
+ do_setusercontext(authctxt->pw);
+
+ skip:
+ /* It is safe now to apply the key state */
+ monitor_apply_keystate(ssh, pmonitor);
+
+ /*
+ * Tell the packet layer that authentication was successful, since
+ * this information is not part of the key state.
+ */
+ ssh_packet_set_authenticated(ssh);
+}
+
+static void
+append_hostkey_type(struct sshbuf *b, const char *s)
+{
+ int r;
+
+ if (match_pattern_list(s, options.hostkeyalgorithms, 0) != 1) {
+ debug3_f("%s key not permitted by HostkeyAlgorithms", s);
+ return;
+ }
+ if ((r = sshbuf_putf(b, "%s%s", sshbuf_len(b) > 0 ? "," : "", s)) != 0)
+ fatal_fr(r, "sshbuf_putf");
+}
+
+static char *
+list_hostkey_types(void)
+{
+ struct sshbuf *b;
+ struct sshkey *key;
+ char *ret;
+ u_int i;
+
+ if ((b = sshbuf_new()) == NULL)
+ fatal_f("sshbuf_new failed");
+ for (i = 0; i < options.num_host_key_files; i++) {
+ key = sensitive_data.host_keys[i];
+ if (key == NULL)
+ key = sensitive_data.host_pubkeys[i];
+ if (key == NULL)
+ continue;
+ switch (key->type) {
+ case KEY_RSA:
+ /* for RSA we also support SHA2 signatures */
+ append_hostkey_type(b, "rsa-sha2-512");
+ append_hostkey_type(b, "rsa-sha2-256");
+ /* FALLTHROUGH */
+ case KEY_DSA:
+ case KEY_ECDSA:
+ case KEY_ED25519:
+ case KEY_ECDSA_SK:
+ case KEY_ED25519_SK:
+ case KEY_XMSS:
+ append_hostkey_type(b, sshkey_ssh_name(key));
+ break;
+ }
+ /* If the private key has a cert peer, then list that too */
+ key = sensitive_data.host_certificates[i];
+ if (key == NULL)
+ continue;
+ switch (key->type) {
+ case KEY_RSA_CERT:
+ /* for RSA we also support SHA2 signatures */
+ append_hostkey_type(b,
+ "rsa-sha2-512-cert-v01@openssh.com");
+ append_hostkey_type(b,
+ "rsa-sha2-256-cert-v01@openssh.com");
+ /* FALLTHROUGH */
+ case KEY_DSA_CERT:
+ case KEY_ECDSA_CERT:
+ case KEY_ED25519_CERT:
+ case KEY_ECDSA_SK_CERT:
+ case KEY_ED25519_SK_CERT:
+ case KEY_XMSS_CERT:
+ append_hostkey_type(b, sshkey_ssh_name(key));
+ break;
+ }
+ }
+ if ((ret = sshbuf_dup_string(b)) == NULL)
+ fatal_f("sshbuf_dup_string failed");
+ sshbuf_free(b);
+ debug_f("%s", ret);
+ return ret;
+}
+
+static struct sshkey *
+get_hostkey_by_type(int type, int nid, int need_private, struct ssh *ssh)
+{
+ u_int i;
+ struct sshkey *key;
+
+ for (i = 0; i < options.num_host_key_files; i++) {
+ switch (type) {
+ case KEY_RSA_CERT:
+ case KEY_DSA_CERT:
+ case KEY_ECDSA_CERT:
+ case KEY_ED25519_CERT:
+ case KEY_ECDSA_SK_CERT:
+ case KEY_ED25519_SK_CERT:
+ case KEY_XMSS_CERT:
+ key = sensitive_data.host_certificates[i];
+ break;
+ default:
+ key = sensitive_data.host_keys[i];
+ if (key == NULL && !need_private)
+ key = sensitive_data.host_pubkeys[i];
+ break;
+ }
+ if (key == NULL || key->type != type)
+ continue;
+ switch (type) {
+ case KEY_ECDSA:
+ case KEY_ECDSA_SK:
+ case KEY_ECDSA_CERT:
+ case KEY_ECDSA_SK_CERT:
+ if (key->ecdsa_nid != nid)
+ continue;
+ /* FALLTHROUGH */
+ default:
+ return need_private ?
+ sensitive_data.host_keys[i] : key;
+ }
+ }
+ return NULL;
+}
+
+struct sshkey *
+get_hostkey_public_by_type(int type, int nid, struct ssh *ssh)
+{
+ return get_hostkey_by_type(type, nid, 0, ssh);
+}
+
+struct sshkey *
+get_hostkey_private_by_type(int type, int nid, struct ssh *ssh)
+{
+ return get_hostkey_by_type(type, nid, 1, ssh);
+}
+
+struct sshkey *
+get_hostkey_by_index(int ind)
+{
+ if (ind < 0 || (u_int)ind >= options.num_host_key_files)
+ return (NULL);
+ return (sensitive_data.host_keys[ind]);
+}
+
+struct sshkey *
+get_hostkey_public_by_index(int ind, struct ssh *ssh)
+{
+ if (ind < 0 || (u_int)ind >= options.num_host_key_files)
+ return (NULL);
+ return (sensitive_data.host_pubkeys[ind]);
+}
+
+int
+get_hostkey_index(struct sshkey *key, int compare, struct ssh *ssh)
+{
+ u_int i;
+
+ for (i = 0; i < options.num_host_key_files; i++) {
+ if (sshkey_is_cert(key)) {
+ if (key == sensitive_data.host_certificates[i] ||
+ (compare && sensitive_data.host_certificates[i] &&
+ sshkey_equal(key,
+ sensitive_data.host_certificates[i])))
+ return (i);
+ } else {
+ if (key == sensitive_data.host_keys[i] ||
+ (compare && sensitive_data.host_keys[i] &&
+ sshkey_equal(key, sensitive_data.host_keys[i])))
+ return (i);
+ if (key == sensitive_data.host_pubkeys[i] ||
+ (compare && sensitive_data.host_pubkeys[i] &&
+ sshkey_equal(key, sensitive_data.host_pubkeys[i])))
+ return (i);
+ }
+ }
+ return (-1);
+}
+
+/* Inform the client of all hostkeys */
+static void
+notify_hostkeys(struct ssh *ssh)
+{
+ struct sshbuf *buf;
+ struct sshkey *key;
+ u_int i, nkeys;
+ int r;
+ char *fp;
+
+ /* Some clients cannot cope with the hostkeys message, skip those. */
+ if (ssh->compat & SSH_BUG_HOSTKEYS)
+ return;
+
+ if ((buf = sshbuf_new()) == NULL)
+ fatal_f("sshbuf_new");
+ for (i = nkeys = 0; i < options.num_host_key_files; i++) {
+ key = get_hostkey_public_by_index(i, ssh);
+ if (key == NULL || key->type == KEY_UNSPEC ||
+ sshkey_is_cert(key))
+ continue;
+ fp = sshkey_fingerprint(key, options.fingerprint_hash,
+ SSH_FP_DEFAULT);
+ debug3_f("key %d: %s %s", i, sshkey_ssh_name(key), fp);
+ free(fp);
+ if (nkeys == 0) {
+ /*
+ * Start building the request when we find the
+ * first usable key.
+ */
+ if ((r = sshpkt_start(ssh, SSH2_MSG_GLOBAL_REQUEST)) != 0 ||
+ (r = sshpkt_put_cstring(ssh, "hostkeys-00@openssh.com")) != 0 ||
+ (r = sshpkt_put_u8(ssh, 0)) != 0) /* want reply */
+ sshpkt_fatal(ssh, r, "%s: start request", __func__);
+ }
+ /* Append the key to the request */
+ sshbuf_reset(buf);
+ if ((r = sshkey_putb(key, buf)) != 0)
+ fatal_fr(r, "couldn't put hostkey %d", i);
+ if ((r = sshpkt_put_stringb(ssh, buf)) != 0)
+ sshpkt_fatal(ssh, r, "%s: append key", __func__);
+ nkeys++;
+ }
+ debug3_f("sent %u hostkeys", nkeys);
+ if (nkeys == 0)
+ fatal_f("no hostkeys");
+ if ((r = sshpkt_send(ssh)) != 0)
+ sshpkt_fatal(ssh, r, "%s: send", __func__);
+ sshbuf_free(buf);
+}
+
+/*
+ * returns 1 if connection should be dropped, 0 otherwise.
+ * dropping starts at connection #max_startups_begin with a probability
+ * of (max_startups_rate/100). the probability increases linearly until
+ * all connections are dropped for startups > max_startups
+ */
+static int
+should_drop_connection(int startups)
+{
+ int p, r;
+
+ if (startups < options.max_startups_begin)
+ return 0;
+ if (startups >= options.max_startups)
+ return 1;
+ if (options.max_startups_rate == 100)
+ return 1;
+
+ p = 100 - options.max_startups_rate;
+ p *= startups - options.max_startups_begin;
+ p /= options.max_startups - options.max_startups_begin;
+ p += options.max_startups_rate;
+ r = arc4random_uniform(100);
+
+ debug_f("p %d, r %d", p, r);
+ return (r < p) ? 1 : 0;
+}
+
+/*
+ * Check whether connection should be accepted by MaxStartups.
+ * Returns 0 if the connection is accepted. If the connection is refused,
+ * returns 1 and attempts to send notification to client.
+ * Logs when the MaxStartups condition is entered or exited, and periodically
+ * while in that state.
+ */
+static int
+drop_connection(int sock, int startups, int notify_pipe)
+{
+ char *laddr, *raddr;
+ const char msg[] = "Exceeded MaxStartups\r\n";
+ static time_t last_drop, first_drop;
+ static u_int ndropped;
+ LogLevel drop_level = SYSLOG_LEVEL_VERBOSE;
+ time_t now;
+
+ now = monotime();
+ if (!should_drop_connection(startups) &&
+ srclimit_check_allow(sock, notify_pipe) == 1) {
+ if (last_drop != 0 &&
+ startups < options.max_startups_begin - 1) {
+ /* XXX maybe need better hysteresis here */
+ logit("exited MaxStartups throttling after %s, "
+ "%u connections dropped",
+ fmt_timeframe(now - first_drop), ndropped);
+ last_drop = 0;
+ }
+ return 0;
+ }
+
+#define SSHD_MAXSTARTUPS_LOG_INTERVAL (5 * 60)
+ if (last_drop == 0) {
+ error("beginning MaxStartups throttling");
+ drop_level = SYSLOG_LEVEL_INFO;
+ first_drop = now;
+ ndropped = 0;
+ } else if (last_drop + SSHD_MAXSTARTUPS_LOG_INTERVAL < now) {
+ /* Periodic logs */
+ error("in MaxStartups throttling for %s, "
+ "%u connections dropped",
+ fmt_timeframe(now - first_drop), ndropped + 1);
+ drop_level = SYSLOG_LEVEL_INFO;
+ }
+ last_drop = now;
+ ndropped++;
+
+ laddr = get_local_ipaddr(sock);
+ raddr = get_peer_ipaddr(sock);
+ do_log2(drop_level, "drop connection #%d from [%s]:%d on [%s]:%d "
+ "past MaxStartups", startups, raddr, get_peer_port(sock),
+ laddr, get_local_port(sock));
+ free(laddr);
+ free(raddr);
+ /* best-effort notification to client */
+ (void)write(sock, msg, sizeof(msg) - 1);
+ return 1;
+}
+
+static void
+usage(void)
+{
+ fprintf(stderr, "%s, %s\n", SSH_RELEASE, SSH_OPENSSL_VERSION);
+ fprintf(stderr,
+"usage: sshd [-46DdeiqTt] [-C connection_spec] [-c host_cert_file]\n"
+" [-E log_file] [-f config_file] [-g login_grace_time]\n"
+" [-h host_key_file] [-o option] [-p port] [-u len]\n"
+ );
+ exit(1);
+}
+
+static void
+send_rexec_state(int fd, struct sshbuf *conf)
+{
+ struct sshbuf *m = NULL, *inc = NULL;
+ struct include_item *item = NULL;
+ int r;
+
+ debug3_f("entering fd = %d config len %zu", fd,
+ sshbuf_len(conf));
+
+ if ((m = sshbuf_new()) == NULL || (inc = sshbuf_new()) == NULL)
+ fatal_f("sshbuf_new failed");
+
+ /* pack includes into a string */
+ TAILQ_FOREACH(item, &includes, entry) {
+ if ((r = sshbuf_put_cstring(inc, item->selector)) != 0 ||
+ (r = sshbuf_put_cstring(inc, item->filename)) != 0 ||
+ (r = sshbuf_put_stringb(inc, item->contents)) != 0)
+ fatal_fr(r, "compose includes");
+ }
+
+ /*
+ * Protocol from reexec master to child:
+ * string configuration
+ * string included_files[] {
+ * string selector
+ * string filename
+ * string contents
+ * }
+ * string rng_seed (if required)
+ */
+ if ((r = sshbuf_put_stringb(m, conf)) != 0 ||
+ (r = sshbuf_put_stringb(m, inc)) != 0)
+ fatal_fr(r, "compose config");
+#if defined(WITH_OPENSSL) && !defined(OPENSSL_PRNG_ONLY)
+ rexec_send_rng_seed(m);
+#endif
+ if (ssh_msg_send(fd, 0, m) == -1)
+ error_f("ssh_msg_send failed");
+
+ sshbuf_free(m);
+ sshbuf_free(inc);
+
+ debug3_f("done");
+}
+
+static void
+recv_rexec_state(int fd, struct sshbuf *conf)
+{
+ struct sshbuf *m, *inc;
+ u_char *cp, ver;
+ size_t len;
+ int r;
+ struct include_item *item;
+
+ debug3_f("entering fd = %d", fd);
+
+ if ((m = sshbuf_new()) == NULL || (inc = sshbuf_new()) == NULL)
+ fatal_f("sshbuf_new failed");
+ if (ssh_msg_recv(fd, m) == -1)
+ fatal_f("ssh_msg_recv failed");
+ if ((r = sshbuf_get_u8(m, &ver)) != 0)
+ fatal_fr(r, "parse version");
+ if (ver != 0)
+ fatal_f("rexec version mismatch");
+ if ((r = sshbuf_get_string(m, &cp, &len)) != 0 ||
+ (r = sshbuf_get_stringb(m, inc)) != 0)
+ fatal_fr(r, "parse config");
+
+#if defined(WITH_OPENSSL) && !defined(OPENSSL_PRNG_ONLY)
+ rexec_recv_rng_seed(m);
+#endif
+
+ if (conf != NULL && (r = sshbuf_put(conf, cp, len)))
+ fatal_fr(r, "sshbuf_put");
+
+ while (sshbuf_len(inc) != 0) {
+ item = xcalloc(1, sizeof(*item));
+ if ((item->contents = sshbuf_new()) == NULL)
+ fatal_f("sshbuf_new failed");
+ if ((r = sshbuf_get_cstring(inc, &item->selector, NULL)) != 0 ||
+ (r = sshbuf_get_cstring(inc, &item->filename, NULL)) != 0 ||
+ (r = sshbuf_get_stringb(inc, item->contents)) != 0)
+ fatal_fr(r, "parse includes");
+ TAILQ_INSERT_TAIL(&includes, item, entry);
+ }
+
+ free(cp);
+ sshbuf_free(m);
+
+ debug3_f("done");
+}
+
+/* Accept a connection from inetd */
+static void
+server_accept_inetd(int *sock_in, int *sock_out)
+{
+ if (rexeced_flag) {
+ close(REEXEC_CONFIG_PASS_FD);
+ *sock_in = *sock_out = dup(STDIN_FILENO);
+ } else {
+ *sock_in = dup(STDIN_FILENO);
+ *sock_out = dup(STDOUT_FILENO);
+ }
+ /*
+ * We intentionally do not close the descriptors 0, 1, and 2
+ * as our code for setting the descriptors won't work if
+ * ttyfd happens to be one of those.
+ */
+ if (stdfd_devnull(1, 1, !log_stderr) == -1)
+ error_f("stdfd_devnull failed");
+ debug("inetd sockets after dupping: %d, %d", *sock_in, *sock_out);
+}
+
+/*
+ * Listen for TCP connections
+ */
+static void
+listen_on_addrs(struct listenaddr *la)
+{
+ int ret, listen_sock;
+ struct addrinfo *ai;
+ char ntop[NI_MAXHOST], strport[NI_MAXSERV];
+
+ for (ai = la->addrs; ai; ai = ai->ai_next) {
+ if (ai->ai_family != AF_INET && ai->ai_family != AF_INET6)
+ continue;
+ if (num_listen_socks >= MAX_LISTEN_SOCKS)
+ fatal("Too many listen sockets. "
+ "Enlarge MAX_LISTEN_SOCKS");
+ if ((ret = getnameinfo(ai->ai_addr, ai->ai_addrlen,
+ ntop, sizeof(ntop), strport, sizeof(strport),
+ NI_NUMERICHOST|NI_NUMERICSERV)) != 0) {
+ error("getnameinfo failed: %.100s",
+ ssh_gai_strerror(ret));
+ continue;
+ }
+ /* Create socket for listening. */
+ listen_sock = socket(ai->ai_family, ai->ai_socktype,
+ ai->ai_protocol);
+ if (listen_sock == -1) {
+ /* kernel may not support ipv6 */
+ verbose("socket: %.100s", strerror(errno));
+ continue;
+ }
+ if (set_nonblock(listen_sock) == -1) {
+ close(listen_sock);
+ continue;
+ }
+ if (fcntl(listen_sock, F_SETFD, FD_CLOEXEC) == -1) {
+ verbose("socket: CLOEXEC: %s", strerror(errno));
+ close(listen_sock);
+ continue;
+ }
+ /* Socket options */
+ set_reuseaddr(listen_sock);
+ if (la->rdomain != NULL &&
+ set_rdomain(listen_sock, la->rdomain) == -1) {
+ close(listen_sock);
+ continue;
+ }
+
+ /* Only communicate in IPv6 over AF_INET6 sockets. */
+ if (ai->ai_family == AF_INET6)
+ sock_set_v6only(listen_sock);
+
+ debug("Bind to port %s on %s.", strport, ntop);
+
+ /* Bind the socket to the desired port. */
+ if (bind(listen_sock, ai->ai_addr, ai->ai_addrlen) == -1) {
+ error("Bind to port %s on %s failed: %.200s.",
+ strport, ntop, strerror(errno));
+ close(listen_sock);
+ continue;
+ }
+ listen_socks[num_listen_socks] = listen_sock;
+ num_listen_socks++;
+
+ /* Start listening on the port. */
+ if (listen(listen_sock, SSH_LISTEN_BACKLOG) == -1)
+ fatal("listen on [%s]:%s: %.100s",
+ ntop, strport, strerror(errno));
+ logit("Server listening on %s port %s%s%s.",
+ ntop, strport,
+ la->rdomain == NULL ? "" : " rdomain ",
+ la->rdomain == NULL ? "" : la->rdomain);
+ }
+}
+
+static void
+server_listen(void)
+{
+ u_int i;
+
+ /* Initialise per-source limit tracking. */
+ srclimit_init(options.max_startups, options.per_source_max_startups,
+ options.per_source_masklen_ipv4, options.per_source_masklen_ipv6);
+
+ for (i = 0; i < options.num_listen_addrs; i++) {
+ listen_on_addrs(&options.listen_addrs[i]);
+ freeaddrinfo(options.listen_addrs[i].addrs);
+ free(options.listen_addrs[i].rdomain);
+ memset(&options.listen_addrs[i], 0,
+ sizeof(options.listen_addrs[i]));
+ }
+ free(options.listen_addrs);
+ options.listen_addrs = NULL;
+ options.num_listen_addrs = 0;
+
+ if (!num_listen_socks)
+ fatal("Cannot bind any address.");
+}
+
+/*
+ * The main TCP accept loop. Note that, for the non-debug case, returns
+ * from this function are in a forked subprocess.
+ */
+static void
+server_accept_loop(int *sock_in, int *sock_out, int *newsock, int *config_s)
+{
+ fd_set *fdset;
+ int i, j, ret, maxfd;
+ int ostartups = -1, startups = 0, listening = 0, lameduck = 0;
+ int startup_p[2] = { -1 , -1 };
+ char c = 0;
+ struct sockaddr_storage from;
+ socklen_t fromlen;
+ pid_t pid;
+ u_char rnd[256];
+
+ /* setup fd set for accept */
+ fdset = NULL;
+ maxfd = 0;
+ for (i = 0; i < num_listen_socks; i++)
+ if (listen_socks[i] > maxfd)
+ maxfd = listen_socks[i];
+ /* pipes connected to unauthenticated child sshd processes */
+ startup_pipes = xcalloc(options.max_startups, sizeof(int));
+ startup_flags = xcalloc(options.max_startups, sizeof(int));
+ for (i = 0; i < options.max_startups; i++)
+ startup_pipes[i] = -1;
+
+ /*
+ * Stay listening for connections until the system crashes or
+ * the daemon is killed with a signal.
+ */
+ for (;;) {
+ if (ostartups != startups) {
+ setproctitle("%s [listener] %d of %d-%d startups",
+ listener_proctitle, startups,
+ options.max_startups_begin, options.max_startups);
+ ostartups = startups;
+ }
+ if (received_sighup) {
+ if (!lameduck) {
+ debug("Received SIGHUP; waiting for children");
+ close_listen_socks();
+ lameduck = 1;
+ }
+ if (listening <= 0)
+ sighup_restart();
+ }
+ free(fdset);
+ fdset = xcalloc(howmany(maxfd + 1, NFDBITS),
+ sizeof(fd_mask));
+
+ for (i = 0; i < num_listen_socks; i++)
+ FD_SET(listen_socks[i], fdset);
+ for (i = 0; i < options.max_startups; i++)
+ if (startup_pipes[i] != -1)
+ FD_SET(startup_pipes[i], fdset);
+
+ /* Wait in select until there is a connection. */
+ ret = select(maxfd+1, fdset, NULL, NULL, NULL);
+ if (ret == -1 && errno != EINTR)
+ error("select: %.100s", strerror(errno));
+ if (received_sigterm) {
+ logit("Received signal %d; terminating.",
+ (int) received_sigterm);
+ close_listen_socks();
+ if (options.pid_file != NULL)
+ unlink(options.pid_file);
+ exit(received_sigterm == SIGTERM ? 0 : 255);
+ }
+ if (ret == -1)
+ continue;
+
+ for (i = 0; i < options.max_startups; i++) {
+ if (startup_pipes[i] == -1 ||
+ !FD_ISSET(startup_pipes[i], fdset))
+ continue;
+ switch (read(startup_pipes[i], &c, sizeof(c))) {
+ case -1:
+ if (errno == EINTR || errno == EAGAIN)
+ continue;
+ if (errno != EPIPE) {
+ error_f("startup pipe %d (fd=%d): "
+ "read %s", i, startup_pipes[i],
+ strerror(errno));
+ }
+ /* FALLTHROUGH */
+ case 0:
+ /* child exited or completed auth */
+ close(startup_pipes[i]);
+ srclimit_done(startup_pipes[i]);
+ startup_pipes[i] = -1;
+ startups--;
+ if (startup_flags[i])
+ listening--;
+ break;
+ case 1:
+ /* child has finished preliminaries */
+ if (startup_flags[i]) {
+ listening--;
+ startup_flags[i] = 0;
+ }
+ break;
+ }
+ }
+ for (i = 0; i < num_listen_socks; i++) {
+ if (!FD_ISSET(listen_socks[i], fdset))
+ continue;
+ fromlen = sizeof(from);
+ *newsock = accept(listen_socks[i],
+ (struct sockaddr *)&from, &fromlen);
+ if (*newsock == -1) {
+ if (errno != EINTR && errno != EWOULDBLOCK &&
+ errno != ECONNABORTED && errno != EAGAIN)
+ error("accept: %.100s",
+ strerror(errno));
+ if (errno == EMFILE || errno == ENFILE)
+ usleep(100 * 1000);
+ continue;
+ }
+ if (unset_nonblock(*newsock) == -1 ||
+ pipe(startup_p) == -1)
+ continue;
+ if (drop_connection(*newsock, startups, startup_p[0])) {
+ close(*newsock);
+ close(startup_p[0]);
+ close(startup_p[1]);
+ continue;
+ }
+
+ if (rexec_flag && socketpair(AF_UNIX,
+ SOCK_STREAM, 0, config_s) == -1) {
+ error("reexec socketpair: %s",
+ strerror(errno));
+ close(*newsock);
+ close(startup_p[0]);
+ close(startup_p[1]);
+ continue;
+ }
+
+ for (j = 0; j < options.max_startups; j++)
+ if (startup_pipes[j] == -1) {
+ startup_pipes[j] = startup_p[0];
+ if (maxfd < startup_p[0])
+ maxfd = startup_p[0];
+ startups++;
+ startup_flags[j] = 1;
+ break;
+ }
+
+ /*
+ * Got connection. Fork a child to handle it, unless
+ * we are in debugging mode.
+ */
+ if (debug_flag) {
+ /*
+ * In debugging mode. Close the listening
+ * socket, and start processing the
+ * connection without forking.
+ */
+ debug("Server will not fork when running in debugging mode.");
+ close_listen_socks();
+ *sock_in = *newsock;
+ *sock_out = *newsock;
+ close(startup_p[0]);
+ close(startup_p[1]);
+ startup_pipe = -1;
+ pid = getpid();
+ if (rexec_flag) {
+ send_rexec_state(config_s[0], cfg);
+ close(config_s[0]);
+ }
+ return;
+ }
+
+ /*
+ * Normal production daemon. Fork, and have
+ * the child process the connection. The
+ * parent continues listening.
+ */
+ platform_pre_fork();
+ listening++;
+ if ((pid = fork()) == 0) {
+ /*
+ * Child. Close the listening and
+ * max_startup sockets. Start using
+ * the accepted socket. Reinitialize
+ * logging (since our pid has changed).
+ * We return from this function to handle
+ * the connection.
+ */
+ platform_post_fork_child();
+ startup_pipe = startup_p[1];
+ close_startup_pipes();
+ close_listen_socks();
+ *sock_in = *newsock;
+ *sock_out = *newsock;
+ log_init(__progname,
+ options.log_level,
+ options.log_facility,
+ log_stderr);
+ if (rexec_flag)
+ close(config_s[0]);
+ else {
+ /*
+ * Signal parent that the preliminaries
+ * for this child are complete. For the
+ * re-exec case, this happens after the
+ * child has received the rexec state
+ * from the server.
+ */
+ (void)atomicio(vwrite, startup_pipe,
+ "\0", 1);
+ }
+ return;
+ }
+
+ /* Parent. Stay in the loop. */
+ platform_post_fork_parent(pid);
+ if (pid == -1)
+ error("fork: %.100s", strerror(errno));
+ else
+ debug("Forked child %ld.", (long)pid);
+
+ close(startup_p[1]);
+
+ if (rexec_flag) {
+ close(config_s[1]);
+ send_rexec_state(config_s[0], cfg);
+ close(config_s[0]);
+ }
+ close(*newsock);
+
+ /*
+ * Ensure that our random state differs
+ * from that of the child
+ */
+ arc4random_stir();
+ arc4random_buf(rnd, sizeof(rnd));
+#ifdef WITH_OPENSSL
+ RAND_seed(rnd, sizeof(rnd));
+ if ((RAND_bytes((u_char *)rnd, 1)) != 1)
+ fatal("%s: RAND_bytes failed", __func__);
+#endif
+ explicit_bzero(rnd, sizeof(rnd));
+ }
+ }
+}
+
+/*
+ * If IP options are supported, make sure there are none (log and
+ * return an error if any are found). Basically we are worried about
+ * source routing; it can be used to pretend you are somebody
+ * (ip-address) you are not. That itself may be "almost acceptable"
+ * under certain circumstances, but rhosts authentication is useless
+ * if source routing is accepted. Notice also that if we just dropped
+ * source routing here, the other side could use IP spoofing to do
+ * rest of the interaction and could still bypass security. So we
+ * exit here if we detect any IP options.
+ */
+static void
+check_ip_options(struct ssh *ssh)
+{
+#ifdef IP_OPTIONS
+ int sock_in = ssh_packet_get_connection_in(ssh);
+ struct sockaddr_storage from;
+ u_char opts[200];
+ socklen_t i, option_size = sizeof(opts), fromlen = sizeof(from);
+ char text[sizeof(opts) * 3 + 1];
+
+ memset(&from, 0, sizeof(from));
+ if (getpeername(sock_in, (struct sockaddr *)&from,
+ &fromlen) == -1)
+ return;
+ if (from.ss_family != AF_INET)
+ return;
+ /* XXX IPv6 options? */
+
+ if (getsockopt(sock_in, IPPROTO_IP, IP_OPTIONS, opts,
+ &option_size) >= 0 && option_size != 0) {
+ text[0] = '\0';
+ for (i = 0; i < option_size; i++)
+ snprintf(text + i*3, sizeof(text) - i*3,
+ " %2.2x", opts[i]);
+ fatal("Connection from %.100s port %d with IP opts: %.800s",
+ ssh_remote_ipaddr(ssh), ssh_remote_port(ssh), text);
+ }
+ return;
+#endif /* IP_OPTIONS */
+}
+
+/* Set the routing domain for this process */
+static void
+set_process_rdomain(struct ssh *ssh, const char *name)
+{
+#if defined(HAVE_SYS_SET_PROCESS_RDOMAIN)
+ if (name == NULL)
+ return; /* default */
+
+ if (strcmp(name, "%D") == 0) {
+ /* "expands" to routing domain of connection */
+ if ((name = ssh_packet_rdomain_in(ssh)) == NULL)
+ return;
+ }
+ /* NB. We don't pass 'ssh' to sys_set_process_rdomain() */
+ return sys_set_process_rdomain(name);
+#elif defined(__OpenBSD__)
+ int rtable, ortable = getrtable();
+ const char *errstr;
+
+ if (name == NULL)
+ return; /* default */
+
+ if (strcmp(name, "%D") == 0) {
+ /* "expands" to routing domain of connection */
+ if ((name = ssh_packet_rdomain_in(ssh)) == NULL)
+ return;
+ }
+
+ rtable = (int)strtonum(name, 0, 255, &errstr);
+ if (errstr != NULL) /* Shouldn't happen */
+ fatal("Invalid routing domain \"%s\": %s", name, errstr);
+ if (rtable != ortable && setrtable(rtable) != 0)
+ fatal("Unable to set routing domain %d: %s",
+ rtable, strerror(errno));
+ debug_f("set routing domain %d (was %d)", rtable, ortable);
+#else /* defined(__OpenBSD__) */
+ fatal("Unable to set routing domain: not supported in this platform");
+#endif
+}
+
+static void
+accumulate_host_timing_secret(struct sshbuf *server_cfg,
+ struct sshkey *key)
+{
+ static struct ssh_digest_ctx *ctx;
+ u_char *hash;
+ size_t len;
+ struct sshbuf *buf;
+ int r;
+
+ if (ctx == NULL && (ctx = ssh_digest_start(SSH_DIGEST_SHA512)) == NULL)
+ fatal_f("ssh_digest_start");
+ if (key == NULL) { /* finalize */
+ /* add server config in case we are using agent for host keys */
+ if (ssh_digest_update(ctx, sshbuf_ptr(server_cfg),
+ sshbuf_len(server_cfg)) != 0)
+ fatal_f("ssh_digest_update");
+ len = ssh_digest_bytes(SSH_DIGEST_SHA512);
+ hash = xmalloc(len);
+ if (ssh_digest_final(ctx, hash, len) != 0)
+ fatal_f("ssh_digest_final");
+ options.timing_secret = PEEK_U64(hash);
+ freezero(hash, len);
+ ssh_digest_free(ctx);
+ ctx = NULL;
+ return;
+ }
+ if ((buf = sshbuf_new()) == NULL)
+ fatal_f("could not allocate buffer");
+ if ((r = sshkey_private_serialize(key, buf)) != 0)
+ fatal_fr(r, "decode key");
+ if (ssh_digest_update(ctx, sshbuf_ptr(buf), sshbuf_len(buf)) != 0)
+ fatal_f("ssh_digest_update");
+ sshbuf_reset(buf);
+ sshbuf_free(buf);
+}
+
+static char *
+prepare_proctitle(int ac, char **av)
+{
+ char *ret = NULL;
+ int i;
+
+ for (i = 0; i < ac; i++)
+ xextendf(&ret, " ", "%s", av[i]);
+ return ret;
+}
+
+/*
+ * Main program for the daemon.
+ */
+int
+main(int ac, char **av)
+{
+ struct ssh *ssh = NULL;
+ extern char *optarg;
+ extern int optind;
+ int r, opt, on = 1, already_daemon, remote_port;
+ int sock_in = -1, sock_out = -1, newsock = -1;
+ const char *remote_ip, *rdomain;
+ char *fp, *line, *laddr, *logfile = NULL;
+ int config_s[2] = { -1 , -1 };
+ u_int i, j;
+ u_int64_t ibytes, obytes;
+ mode_t new_umask;
+ struct sshkey *key;
+ struct sshkey *pubkey;
+ int keytype;
+ Authctxt *authctxt;
+ struct connection_info *connection_info = NULL;
+
+#ifdef HAVE_SECUREWARE
+ (void)set_auth_parameters(ac, av);
+#endif
+ __progname = ssh_get_progname(av[0]);
+
+ /* Save argv. Duplicate so setproctitle emulation doesn't clobber it */
+ saved_argc = ac;
+ rexec_argc = ac;
+ saved_argv = xcalloc(ac + 1, sizeof(*saved_argv));
+ for (i = 0; (int)i < ac; i++)
+ saved_argv[i] = xstrdup(av[i]);
+ saved_argv[i] = NULL;
+
+#ifndef HAVE_SETPROCTITLE
+ /* Prepare for later setproctitle emulation */
+ compat_init_setproctitle(ac, av);
+ av = saved_argv;
+#endif
+
+ if (geteuid() == 0 && setgroups(0, NULL) == -1)
+ debug("setgroups(): %.200s", strerror(errno));
+
+ /* Ensure that fds 0, 1 and 2 are open or directed to /dev/null */
+ sanitise_stdfd();
+
+ seed_rng();
+
+ /* Initialize configuration options to their default values. */
+ initialize_server_options(&options);
+
+ /* Parse command-line arguments. */
+ while ((opt = getopt(ac, av,
+ "C:E:b:c:f:g:h:k:o:p:u:46DQRTdeiqrt")) != -1) {
+ switch (opt) {
+ case '4':
+ options.address_family = AF_INET;
+ break;
+ case '6':
+ options.address_family = AF_INET6;
+ break;
+ case 'f':
+ config_file_name = optarg;
+ break;
+ case 'c':
+ servconf_add_hostcert("[command-line]", 0,
+ &options, optarg);
+ break;
+ case 'd':
+ if (debug_flag == 0) {
+ debug_flag = 1;
+ options.log_level = SYSLOG_LEVEL_DEBUG1;
+ } else if (options.log_level < SYSLOG_LEVEL_DEBUG3)
+ options.log_level++;
+ break;
+ case 'D':
+ no_daemon_flag = 1;
+ break;
+ case 'E':
+ logfile = optarg;
+ /* FALLTHROUGH */
+ case 'e':
+ log_stderr = 1;
+ break;
+ case 'i':
+ inetd_flag = 1;
+ break;
+ case 'r':
+ rexec_flag = 0;
+ break;
+ case 'R':
+ rexeced_flag = 1;
+ inetd_flag = 1;
+ break;
+ case 'Q':
+ /* ignored */
+ break;
+ case 'q':
+ options.log_level = SYSLOG_LEVEL_QUIET;
+ break;
+ case 'b':
+ /* protocol 1, ignored */
+ break;
+ case 'p':
+ options.ports_from_cmdline = 1;
+ if (options.num_ports >= MAX_PORTS) {
+ fprintf(stderr, "too many ports.\n");
+ exit(1);
+ }
+ options.ports[options.num_ports++] = a2port(optarg);
+ if (options.ports[options.num_ports-1] <= 0) {
+ fprintf(stderr, "Bad port number.\n");
+ exit(1);
+ }
+ break;
+ case 'g':
+ if ((options.login_grace_time = convtime(optarg)) == -1) {
+ fprintf(stderr, "Invalid login grace time.\n");
+ exit(1);
+ }
+ break;
+ case 'k':
+ /* protocol 1, ignored */
+ break;
+ case 'h':
+ servconf_add_hostkey("[command-line]", 0,
+ &options, optarg, 1);
+ break;
+ case 't':
+ test_flag = 1;
+ break;
+ case 'T':
+ test_flag = 2;
+ break;
+ case 'C':
+ connection_info = get_connection_info(ssh, 0, 0);
+ if (parse_server_match_testspec(connection_info,
+ optarg) == -1)
+ exit(1);
+ break;
+ case 'u':
+ utmp_len = (u_int)strtonum(optarg, 0, HOST_NAME_MAX+1+1, NULL);
+ if (utmp_len > HOST_NAME_MAX+1) {
+ fprintf(stderr, "Invalid utmp length.\n");
+ exit(1);
+ }
+ break;
+ case 'o':
+ line = xstrdup(optarg);
+ if (process_server_config_line(&options, line,
+ "command-line", 0, NULL, NULL, &includes) != 0)
+ exit(1);
+ free(line);
+ break;
+ case '?':
+ default:
+ usage();
+ break;
+ }
+ }
+ if (rexeced_flag || inetd_flag)
+ rexec_flag = 0;
+ if (!test_flag && rexec_flag && !path_absolute(av[0]))
+ fatal("sshd re-exec requires execution with an absolute path");
+ if (rexeced_flag)
+ closefrom(REEXEC_MIN_FREE_FD);
+ else
+ closefrom(REEXEC_DEVCRYPTO_RESERVED_FD);
+
+ /* If requested, redirect the logs to the specified logfile. */
+ if (logfile != NULL)
+ log_redirect_stderr_to(logfile);
+ /*
+ * Force logging to stderr until we have loaded the private host
+ * key (unless started from inetd)
+ */
+ log_init(__progname,
+ options.log_level == SYSLOG_LEVEL_NOT_SET ?
+ SYSLOG_LEVEL_INFO : options.log_level,
+ options.log_facility == SYSLOG_FACILITY_NOT_SET ?
+ SYSLOG_FACILITY_AUTH : options.log_facility,
+ log_stderr || !inetd_flag || debug_flag);
+
+ /*
+ * Unset KRB5CCNAME, otherwise the user's session may inherit it from
+ * root's environment
+ */
+ if (getenv("KRB5CCNAME") != NULL)
+ (void) unsetenv("KRB5CCNAME");
+
+ sensitive_data.have_ssh2_key = 0;
+
+ /*
+ * If we're not doing an extended test do not silently ignore connection
+ * test params.
+ */
+ if (test_flag < 2 && connection_info != NULL)
+ fatal("Config test connection parameter (-C) provided without "
+ "test mode (-T)");
+
+ /* Fetch our configuration */
+ if ((cfg = sshbuf_new()) == NULL)
+ fatal_f("sshbuf_new failed");
+ if (rexeced_flag) {
+ setproctitle("%s", "[rexeced]");
+ recv_rexec_state(REEXEC_CONFIG_PASS_FD, cfg);
+ if (!debug_flag) {
+ startup_pipe = dup(REEXEC_STARTUP_PIPE_FD);
+ close(REEXEC_STARTUP_PIPE_FD);
+ /*
+ * Signal parent that this child is at a point where
+ * they can go away if they have a SIGHUP pending.
+ */
+ (void)atomicio(vwrite, startup_pipe, "\0", 1);
+ }
+ } else if (strcasecmp(config_file_name, "none") != 0)
+ load_server_config(config_file_name, cfg);
+
+ parse_server_config(&options, rexeced_flag ? "rexec" : config_file_name,
+ cfg, &includes, NULL);
+
+ /* Fill in default values for those options not explicitly set. */
+ fill_default_server_options(&options);
+
+ /* challenge-response is implemented via keyboard interactive */
+ if (options.challenge_response_authentication)
+ options.kbd_interactive_authentication = 1;
+
+ /* Check that options are sensible */
+ if (options.authorized_keys_command_user == NULL &&
+ (options.authorized_keys_command != NULL &&
+ strcasecmp(options.authorized_keys_command, "none") != 0))
+ fatal("AuthorizedKeysCommand set without "
+ "AuthorizedKeysCommandUser");
+ if (options.authorized_principals_command_user == NULL &&
+ (options.authorized_principals_command != NULL &&
+ strcasecmp(options.authorized_principals_command, "none") != 0))
+ fatal("AuthorizedPrincipalsCommand set without "
+ "AuthorizedPrincipalsCommandUser");
+
+ /*
+ * Check whether there is any path through configured auth methods.
+ * Unfortunately it is not possible to verify this generally before
+ * daemonisation in the presence of Match block, but this catches
+ * and warns for trivial misconfigurations that could break login.
+ */
+ if (options.num_auth_methods != 0) {
+ for (i = 0; i < options.num_auth_methods; i++) {
+ if (auth2_methods_valid(options.auth_methods[i],
+ 1) == 0)
+ break;
+ }
+ if (i >= options.num_auth_methods)
+ fatal("AuthenticationMethods cannot be satisfied by "
+ "enabled authentication methods");
+ }
+
+ /* Check that there are no remaining arguments. */
+ if (optind < ac) {
+ fprintf(stderr, "Extra argument %s.\n", av[optind]);
+ exit(1);
+ }
+
+ debug("sshd version %s, %s", SSH_VERSION, SSH_OPENSSL_VERSION);
+
+ /* Store privilege separation user for later use if required. */
+ privsep_chroot = use_privsep && (getuid() == 0 || geteuid() == 0);
+ if ((privsep_pw = getpwnam(SSH_PRIVSEP_USER)) == NULL) {
+ if (privsep_chroot || options.kerberos_authentication)
+ fatal("Privilege separation user %s does not exist",
+ SSH_PRIVSEP_USER);
+ } else {
+ privsep_pw = pwcopy(privsep_pw);
+ freezero(privsep_pw->pw_passwd, strlen(privsep_pw->pw_passwd));
+ privsep_pw->pw_passwd = xstrdup("*");
+ }
+ endpwent();
+
+ /* load host keys */
+ sensitive_data.host_keys = xcalloc(options.num_host_key_files,
+ sizeof(struct sshkey *));
+ sensitive_data.host_pubkeys = xcalloc(options.num_host_key_files,
+ sizeof(struct sshkey *));
+
+ if (options.host_key_agent) {
+ if (strcmp(options.host_key_agent, SSH_AUTHSOCKET_ENV_NAME))
+ setenv(SSH_AUTHSOCKET_ENV_NAME,
+ options.host_key_agent, 1);
+ if ((r = ssh_get_authentication_socket(NULL)) == 0)
+ have_agent = 1;
+ else
+ error_r(r, "Could not connect to agent \"%s\"",
+ options.host_key_agent);
+ }
+
+ for (i = 0; i < options.num_host_key_files; i++) {
+ int ll = options.host_key_file_userprovided[i] ?
+ SYSLOG_LEVEL_ERROR : SYSLOG_LEVEL_DEBUG1;
+
+ if (options.host_key_files[i] == NULL)
+ continue;
+ if ((r = sshkey_load_private(options.host_key_files[i], "",
+ &key, NULL)) != 0 && r != SSH_ERR_SYSTEM_ERROR)
+ do_log2_r(r, ll, "Unable to load host key \"%s\"",
+ options.host_key_files[i]);
+ if (sshkey_is_sk(key) &&
+ key->sk_flags & SSH_SK_USER_PRESENCE_REQD) {
+ debug("host key %s requires user presence, ignoring",
+ options.host_key_files[i]);
+ key->sk_flags &= ~SSH_SK_USER_PRESENCE_REQD;
+ }
+ if (r == 0 && key != NULL &&
+ (r = sshkey_shield_private(key)) != 0) {
+ do_log2_r(r, ll, "Unable to shield host key \"%s\"",
+ options.host_key_files[i]);
+ sshkey_free(key);
+ key = NULL;
+ }
+ if ((r = sshkey_load_public(options.host_key_files[i],
+ &pubkey, NULL)) != 0 && r != SSH_ERR_SYSTEM_ERROR)
+ do_log2_r(r, ll, "Unable to load host key \"%s\"",
+ options.host_key_files[i]);
+ if (pubkey != NULL && key != NULL) {
+ if (!sshkey_equal(pubkey, key)) {
+ error("Public key for %s does not match "
+ "private key", options.host_key_files[i]);
+ sshkey_free(pubkey);
+ pubkey = NULL;
+ }
+ }
+ if (pubkey == NULL && key != NULL) {
+ if ((r = sshkey_from_private(key, &pubkey)) != 0)
+ fatal_r(r, "Could not demote key: \"%s\"",
+ options.host_key_files[i]);
+ }
+ sensitive_data.host_keys[i] = key;
+ sensitive_data.host_pubkeys[i] = pubkey;
+
+ if (key == NULL && pubkey != NULL && have_agent) {
+ debug("will rely on agent for hostkey %s",
+ options.host_key_files[i]);
+ keytype = pubkey->type;
+ } else if (key != NULL) {
+ keytype = key->type;
+ accumulate_host_timing_secret(cfg, key);
+ } else {
+ do_log2(ll, "Unable to load host key: %s",
+ options.host_key_files[i]);
+ sensitive_data.host_keys[i] = NULL;
+ sensitive_data.host_pubkeys[i] = NULL;
+ continue;
+ }
+
+ switch (keytype) {
+ case KEY_RSA:
+ case KEY_DSA:
+ case KEY_ECDSA:
+ case KEY_ED25519:
+ case KEY_ECDSA_SK:
+ case KEY_ED25519_SK:
+ case KEY_XMSS:
+ if (have_agent || key != NULL)
+ sensitive_data.have_ssh2_key = 1;
+ break;
+ }
+ if ((fp = sshkey_fingerprint(pubkey, options.fingerprint_hash,
+ SSH_FP_DEFAULT)) == NULL)
+ fatal("sshkey_fingerprint failed");
+ debug("%s host key #%d: %s %s",
+ key ? "private" : "agent", i, sshkey_ssh_name(pubkey), fp);
+ free(fp);
+ }
+ accumulate_host_timing_secret(cfg, NULL);
+ if (!sensitive_data.have_ssh2_key) {
+ logit("sshd: no hostkeys available -- exiting.");
+ exit(1);
+ }
+
+ /*
+ * Load certificates. They are stored in an array at identical
+ * indices to the public keys that they relate to.
+ */
+ sensitive_data.host_certificates = xcalloc(options.num_host_key_files,
+ sizeof(struct sshkey *));
+ for (i = 0; i < options.num_host_key_files; i++)
+ sensitive_data.host_certificates[i] = NULL;
+
+ for (i = 0; i < options.num_host_cert_files; i++) {
+ if (options.host_cert_files[i] == NULL)
+ continue;
+ if ((r = sshkey_load_public(options.host_cert_files[i],
+ &key, NULL)) != 0) {
+ error_r(r, "Could not load host certificate \"%s\"",
+ options.host_cert_files[i]);
+ continue;
+ }
+ if (!sshkey_is_cert(key)) {
+ error("Certificate file is not a certificate: %s",
+ options.host_cert_files[i]);
+ sshkey_free(key);
+ continue;
+ }
+ /* Find matching private key */
+ for (j = 0; j < options.num_host_key_files; j++) {
+ if (sshkey_equal_public(key,
+ sensitive_data.host_keys[j])) {
+ sensitive_data.host_certificates[j] = key;
+ break;
+ }
+ }
+ if (j >= options.num_host_key_files) {
+ error("No matching private key for certificate: %s",
+ options.host_cert_files[i]);
+ sshkey_free(key);
+ continue;
+ }
+ sensitive_data.host_certificates[j] = key;
+ debug("host certificate: #%u type %d %s", j, key->type,
+ sshkey_type(key));
+ }
+
+ if (privsep_chroot) {
+ struct stat st;
+
+ if ((stat(_PATH_PRIVSEP_CHROOT_DIR, &st) == -1) ||
+ (S_ISDIR(st.st_mode) == 0))
+ fatal("Missing privilege separation directory: %s",
+ _PATH_PRIVSEP_CHROOT_DIR);
+
+#ifdef HAVE_CYGWIN
+ if (check_ntsec(_PATH_PRIVSEP_CHROOT_DIR) &&
+ (st.st_uid != getuid () ||
+ (st.st_mode & (S_IWGRP|S_IWOTH)) != 0))
+#else
+ if (st.st_uid != 0 || (st.st_mode & (S_IWGRP|S_IWOTH)) != 0)
+#endif
+ fatal("%s must be owned by root and not group or "
+ "world-writable.", _PATH_PRIVSEP_CHROOT_DIR);
+ }
+
+ if (test_flag > 1) {
+ /*
+ * If no connection info was provided by -C then use
+ * use a blank one that will cause no predicate to match.
+ */
+ if (connection_info == NULL)
+ connection_info = get_connection_info(ssh, 0, 0);
+ connection_info->test = 1;
+ parse_server_match_config(&options, &includes, connection_info);
+ dump_config(&options);
+ }
+
+ /* Configuration looks good, so exit if in test mode. */
+ if (test_flag)
+ exit(0);
+
+ /*
+ * Clear out any supplemental groups we may have inherited. This
+ * prevents inadvertent creation of files with bad modes (in the
+ * portable version at least, it's certainly possible for PAM
+ * to create a file, and we can't control the code in every
+ * module which might be used).
+ */
+ if (setgroups(0, NULL) < 0)
+ debug("setgroups() failed: %.200s", strerror(errno));
+
+ if (rexec_flag) {
+ if (rexec_argc < 0)
+ fatal("rexec_argc %d < 0", rexec_argc);
+ rexec_argv = xcalloc(rexec_argc + 2, sizeof(char *));
+ for (i = 0; i < (u_int)rexec_argc; i++) {
+ debug("rexec_argv[%d]='%s'", i, saved_argv[i]);
+ rexec_argv[i] = saved_argv[i];
+ }
+ rexec_argv[rexec_argc] = "-R";
+ rexec_argv[rexec_argc + 1] = NULL;
+ }
+ listener_proctitle = prepare_proctitle(ac, av);
+
+ /* Ensure that umask disallows at least group and world write */
+ new_umask = umask(0077) | 0022;
+ (void) umask(new_umask);
+
+ /* Initialize the log (it is reinitialized below in case we forked). */
+ if (debug_flag && (!inetd_flag || rexeced_flag))
+ log_stderr = 1;
+ log_init(__progname, options.log_level,
+ options.log_facility, log_stderr);
+ for (i = 0; i < options.num_log_verbose; i++)
+ log_verbose_add(options.log_verbose[i]);
+
+ /*
+ * If not in debugging mode, not started from inetd and not already
+ * daemonized (eg re-exec via SIGHUP), disconnect from the controlling
+ * terminal, and fork. The original process exits.
+ */
+ already_daemon = daemonized();
+ if (!(debug_flag || inetd_flag || no_daemon_flag || already_daemon)) {
+
+ if (daemon(0, 0) == -1)
+ fatal("daemon() failed: %.200s", strerror(errno));
+
+ disconnect_controlling_tty();
+ }
+ /* Reinitialize the log (because of the fork above). */
+ log_init(__progname, options.log_level, options.log_facility, log_stderr);
+
+ /* Chdir to the root directory so that the current disk can be
+ unmounted if desired. */
+ if (chdir("/") == -1)
+ error("chdir(\"/\"): %s", strerror(errno));
+
+ /* ignore SIGPIPE */
+ ssh_signal(SIGPIPE, SIG_IGN);
+
+ /* Get a connection, either from inetd or a listening TCP socket */
+ if (inetd_flag) {
+ server_accept_inetd(&sock_in, &sock_out);
+ } else {
+ platform_pre_listen();
+ server_listen();
+
+ ssh_signal(SIGHUP, sighup_handler);
+ ssh_signal(SIGCHLD, main_sigchld_handler);
+ ssh_signal(SIGTERM, sigterm_handler);
+ ssh_signal(SIGQUIT, sigterm_handler);
+
+ /*
+ * Write out the pid file after the sigterm handler
+ * is setup and the listen sockets are bound
+ */
+ if (options.pid_file != NULL && !debug_flag) {
+ FILE *f = fopen(options.pid_file, "w");
+
+ if (f == NULL) {
+ error("Couldn't create pid file \"%s\": %s",
+ options.pid_file, strerror(errno));
+ } else {
+ fprintf(f, "%ld\n", (long) getpid());
+ fclose(f);
+ }
+ }
+
+ /* Accept a connection and return in a forked child */
+ server_accept_loop(&sock_in, &sock_out,
+ &newsock, config_s);
+ }
+
+ /* This is the child processing a new connection. */
+ setproctitle("%s", "[accepted]");
+
+ /*
+ * Create a new session and process group since the 4.4BSD
+ * setlogin() affects the entire process group. We don't
+ * want the child to be able to affect the parent.
+ */
+#if !defined(SSHD_ACQUIRES_CTTY)
+ /*
+ * If setsid is called, on some platforms sshd will later acquire a
+ * controlling terminal which will result in "could not set
+ * controlling tty" errors.
+ */
+ if (!debug_flag && !inetd_flag && setsid() == -1)
+ error("setsid: %.100s", strerror(errno));
+#endif
+
+ if (rexec_flag) {
+ debug("rexec start in %d out %d newsock %d pipe %d sock %d",
+ sock_in, sock_out, newsock, startup_pipe, config_s[0]);
+ dup2(newsock, STDIN_FILENO);
+ dup2(STDIN_FILENO, STDOUT_FILENO);
+ if (startup_pipe == -1)
+ close(REEXEC_STARTUP_PIPE_FD);
+ else if (startup_pipe != REEXEC_STARTUP_PIPE_FD) {
+ dup2(startup_pipe, REEXEC_STARTUP_PIPE_FD);
+ close(startup_pipe);
+ startup_pipe = REEXEC_STARTUP_PIPE_FD;
+ }
+
+ dup2(config_s[1], REEXEC_CONFIG_PASS_FD);
+ close(config_s[1]);
+
+ ssh_signal(SIGHUP, SIG_IGN); /* avoid reset to SIG_DFL */
+ execv(rexec_argv[0], rexec_argv);
+
+ /* Reexec has failed, fall back and continue */
+ error("rexec of %s failed: %s", rexec_argv[0], strerror(errno));
+ recv_rexec_state(REEXEC_CONFIG_PASS_FD, NULL);
+ log_init(__progname, options.log_level,
+ options.log_facility, log_stderr);
+
+ /* Clean up fds */
+ close(REEXEC_CONFIG_PASS_FD);
+ newsock = sock_out = sock_in = dup(STDIN_FILENO);
+ if (stdfd_devnull(1, 1, 0) == -1)
+ error_f("stdfd_devnull failed");
+ debug("rexec cleanup in %d out %d newsock %d pipe %d sock %d",
+ sock_in, sock_out, newsock, startup_pipe, config_s[0]);
+ }
+
+ /* Executed child processes don't need these. */
+ fcntl(sock_out, F_SETFD, FD_CLOEXEC);
+ fcntl(sock_in, F_SETFD, FD_CLOEXEC);
+
+ /* We will not restart on SIGHUP since it no longer makes sense. */
+ ssh_signal(SIGALRM, SIG_DFL);
+ ssh_signal(SIGHUP, SIG_DFL);
+ ssh_signal(SIGTERM, SIG_DFL);
+ ssh_signal(SIGQUIT, SIG_DFL);
+ ssh_signal(SIGCHLD, SIG_DFL);
+ ssh_signal(SIGINT, SIG_DFL);
+
+ /*
+ * Register our connection. This turns encryption off because we do
+ * not have a key.
+ */
+ if ((ssh = ssh_packet_set_connection(NULL, sock_in, sock_out)) == NULL)
+ fatal("Unable to create connection");
+ the_active_state = ssh;
+ ssh_packet_set_server(ssh);
+
+/* Moved LIBWRAP check here */
+#ifdef LIBWRAP
+ allow_severity = options.log_facility|LOG_INFO;
+ deny_severity = options.log_facility|LOG_WARNING;
+ /* Check whether logins are denied from this host. */
+ if (ssh_packet_connection_is_on_socket(ssh)) { /* This check must be after ssh_packet_set_connection() */
+ struct request_info req;
+
+ request_init(&req, RQ_DAEMON, __progname, RQ_FILE, sock_in, 0);
+ fromhost(&req);
+
+ if (!hosts_access(&req)) {
+ debug("Connection refused by tcp wrapper");
+ refuse(&req);
+ /* NOTREACHED */
+ fatal("libwrap refuse returns");
+ }
+ }
+#endif /* LIBWRAP */
+
+ check_ip_options(ssh);
+
+ /* Prepare the channels layer */
+ channel_init_channels(ssh);
+ channel_set_af(ssh, options.address_family);
+ process_permitopen(ssh, &options);
+
+ /* Set SO_KEEPALIVE if requested. */
+ if (options.tcp_keep_alive && ssh_packet_connection_is_on_socket(ssh) &&
+ setsockopt(sock_in, SOL_SOCKET, SO_KEEPALIVE, &on, sizeof(on)) == -1)
+ error("setsockopt SO_KEEPALIVE: %.100s", strerror(errno));
+
+ if ((remote_port = ssh_remote_port(ssh)) < 0) {
+ debug("ssh_remote_port failed");
+ cleanup_exit(255);
+ }
+
+ if (options.routing_domain != NULL)
+ set_process_rdomain(ssh, options.routing_domain);
+
+ /*
+ * The rest of the code depends on the fact that
+ * ssh_remote_ipaddr() caches the remote ip, even if
+ * the socket goes away.
+ */
+ remote_ip = ssh_remote_ipaddr(ssh);
+
+#ifdef SSH_AUDIT_EVENTS
+ audit_connection_from(remote_ip, remote_port);
+#endif
+
+ rdomain = ssh_packet_rdomain_in(ssh);
+
+ /* Log the connection. */
+ laddr = get_local_ipaddr(sock_in);
+ verbose("Connection from %s port %d on %s port %d%s%s%s",
+ remote_ip, remote_port, laddr, ssh_local_port(ssh),
+ rdomain == NULL ? "" : " rdomain \"",
+ rdomain == NULL ? "" : rdomain,
+ rdomain == NULL ? "" : "\"");
+ free(laddr);
+
+ /*
+ * We don't want to listen forever unless the other side
+ * successfully authenticates itself. So we set up an alarm which is
+ * cleared after successful authentication. A limit of zero
+ * indicates no limit. Note that we don't set the alarm in debugging
+ * mode; it is just annoying to have the server exit just when you
+ * are about to discover the bug.
+ */
+ ssh_signal(SIGALRM, grace_alarm_handler);
+ if (!debug_flag)
+ alarm(options.login_grace_time);
+
+ if ((r = kex_exchange_identification(ssh, -1,
+ options.version_addendum)) != 0)
+ sshpkt_fatal(ssh, r, "banner exchange");
+
+ ssh_packet_set_nonblocking(ssh);
+
+ /* allocate authentication context */
+ authctxt = xcalloc(1, sizeof(*authctxt));
+ ssh->authctxt = authctxt;
+
+ authctxt->loginmsg = loginmsg;
+
+ /* XXX global for cleanup, access from other modules */
+ the_authctxt = authctxt;
+
+ /* Set default key authentication options */
+ if ((auth_opts = sshauthopt_new_with_keys_defaults()) == NULL)
+ fatal("allocation failed");
+
+ /* prepare buffer to collect messages to display to user after login */
+ if ((loginmsg = sshbuf_new()) == NULL)
+ fatal_f("sshbuf_new failed");
+ auth_debug_reset();
+
+ if (use_privsep) {
+ if (privsep_preauth(ssh) == 1)
+ goto authenticated;
+ } else if (have_agent) {
+ if ((r = ssh_get_authentication_socket(&auth_sock)) != 0) {
+ error_r(r, "Unable to get agent socket");
+ have_agent = 0;
+ }
+ }
+
+ /* perform the key exchange */
+ /* authenticate user and start session */
+ do_ssh2_kex(ssh);
+ do_authentication2(ssh);
+
+ /*
+ * If we use privilege separation, the unprivileged child transfers
+ * the current keystate and exits
+ */
+ if (use_privsep) {
+ mm_send_keystate(ssh, pmonitor);
+ ssh_packet_clear_keys(ssh);
+ exit(0);
+ }
+
+ authenticated:
+ /*
+ * Cancel the alarm we set to limit the time taken for
+ * authentication.
+ */
+ alarm(0);
+ ssh_signal(SIGALRM, SIG_DFL);
+ authctxt->authenticated = 1;
+ if (startup_pipe != -1) {
+ close(startup_pipe);
+ startup_pipe = -1;
+ }
+
+#ifdef SSH_AUDIT_EVENTS
+ audit_event(ssh, SSH_AUTH_SUCCESS);
+#endif
+
+#ifdef GSSAPI
+ if (options.gss_authentication) {
+ temporarily_use_uid(authctxt->pw);
+ ssh_gssapi_storecreds();
+ restore_uid();
+ }
+#endif
+#ifdef USE_PAM
+ if (options.use_pam) {
+ do_pam_setcred(1);
+ do_pam_session(ssh);
+ }
+#endif
+
+ /*
+ * In privilege separation, we fork another child and prepare
+ * file descriptor passing.
+ */
+ if (use_privsep) {
+ privsep_postauth(ssh, authctxt);
+ /* the monitor process [priv] will not return */
+ }
+
+ ssh_packet_set_timeout(ssh, options.client_alive_interval,
+ options.client_alive_count_max);
+
+ /* Try to send all our hostkeys to the client */
+ notify_hostkeys(ssh);
+
+ /* Start session. */
+ do_authenticated(ssh, authctxt);
+
+ /* The connection has been terminated. */
+ ssh_packet_get_bytes(ssh, &ibytes, &obytes);
+ verbose("Transferred: sent %llu, received %llu bytes",
+ (unsigned long long)obytes, (unsigned long long)ibytes);
+
+ verbose("Closing connection to %.500s port %d", remote_ip, remote_port);
+
+#ifdef USE_PAM
+ if (options.use_pam)
+ finish_pam();
+#endif /* USE_PAM */
+
+#ifdef SSH_AUDIT_EVENTS
+ PRIVSEP(audit_event(ssh, SSH_CONNECTION_CLOSE));
+#endif
+
+ ssh_packet_close(ssh);
+
+ if (use_privsep)
+ mm_terminate();
+
+ exit(0);
+}
+
+int
+sshd_hostkey_sign(struct ssh *ssh, struct sshkey *privkey,
+ struct sshkey *pubkey, u_char **signature, size_t *slenp,
+ const u_char *data, size_t dlen, const char *alg)
+{
+ int r;
+
+ if (use_privsep) {
+ if (privkey) {
+ if (mm_sshkey_sign(ssh, privkey, signature, slenp,
+ data, dlen, alg, options.sk_provider, NULL,
+ ssh->compat) < 0)
+ fatal_f("privkey sign failed");
+ } else {
+ if (mm_sshkey_sign(ssh, pubkey, signature, slenp,
+ data, dlen, alg, options.sk_provider, NULL,
+ ssh->compat) < 0)
+ fatal_f("pubkey sign failed");
+ }
+ } else {
+ if (privkey) {
+ if (sshkey_sign(privkey, signature, slenp, data, dlen,
+ alg, options.sk_provider, NULL, ssh->compat) < 0)
+ fatal_f("privkey sign failed");
+ } else {
+ if ((r = ssh_agent_sign(auth_sock, pubkey,
+ signature, slenp, data, dlen, alg,
+ ssh->compat)) != 0) {
+ fatal_fr(r, "agent sign failed");
+ }
+ }
+ }
+ return 0;
+}
+
+/* SSH2 key exchange */
+static void
+do_ssh2_kex(struct ssh *ssh)
+{
+ char *myproposal[PROPOSAL_MAX] = { KEX_SERVER };
+ struct kex *kex;
+ int r;
+
+ myproposal[PROPOSAL_KEX_ALGS] = compat_kex_proposal(ssh,
+ options.kex_algorithms);
+ myproposal[PROPOSAL_ENC_ALGS_CTOS] = compat_cipher_proposal(ssh,
+ options.ciphers);
+ myproposal[PROPOSAL_ENC_ALGS_STOC] = compat_cipher_proposal(ssh,
+ options.ciphers);
+ myproposal[PROPOSAL_MAC_ALGS_CTOS] =
+ myproposal[PROPOSAL_MAC_ALGS_STOC] = options.macs;
+
+ if (options.compression == COMP_NONE) {
+ myproposal[PROPOSAL_COMP_ALGS_CTOS] =
+ myproposal[PROPOSAL_COMP_ALGS_STOC] = "none";
+ }
+
+ if (options.rekey_limit || options.rekey_interval)
+ ssh_packet_set_rekey_limits(ssh, options.rekey_limit,
+ options.rekey_interval);
+
+ myproposal[PROPOSAL_SERVER_HOST_KEY_ALGS] = compat_pkalg_proposal(
+ ssh, list_hostkey_types());
+
+ /* start key exchange */
+ if ((r = kex_setup(ssh, myproposal)) != 0)
+ fatal_r(r, "kex_setup");
+ kex = ssh->kex;
+#ifdef WITH_OPENSSL
+ kex->kex[KEX_DH_GRP1_SHA1] = kex_gen_server;
+ kex->kex[KEX_DH_GRP14_SHA1] = kex_gen_server;
+ kex->kex[KEX_DH_GRP14_SHA256] = kex_gen_server;
+ kex->kex[KEX_DH_GRP16_SHA512] = kex_gen_server;
+ kex->kex[KEX_DH_GRP18_SHA512] = kex_gen_server;
+ kex->kex[KEX_DH_GEX_SHA1] = kexgex_server;
+ kex->kex[KEX_DH_GEX_SHA256] = kexgex_server;
+# ifdef OPENSSL_HAS_ECC
+ kex->kex[KEX_ECDH_SHA2] = kex_gen_server;
+# endif
+#endif
+ kex->kex[KEX_C25519_SHA256] = kex_gen_server;
+ kex->kex[KEX_KEM_SNTRUP761X25519_SHA512] = kex_gen_server;
+ kex->load_host_public_key=&get_hostkey_public_by_type;
+ kex->load_host_private_key=&get_hostkey_private_by_type;
+ kex->host_key_index=&get_hostkey_index;
+ kex->sign = sshd_hostkey_sign;
+
+ ssh_dispatch_run_fatal(ssh, DISPATCH_BLOCK, &kex->done);
+
+#ifdef DEBUG_KEXDH
+ /* send 1st encrypted/maced/compressed message */
+ if ((r = sshpkt_start(ssh, SSH2_MSG_IGNORE)) != 0 ||
+ (r = sshpkt_put_cstring(ssh, "markus")) != 0 ||
+ (r = sshpkt_send(ssh)) != 0 ||
+ (r = ssh_packet_write_wait(ssh)) != 0)
+ fatal_fr(r, "send test");
+#endif
+ debug("KEX done");
+}
+
+/* server specific fatal cleanup */
+void
+cleanup_exit(int i)
+{
+ if (the_active_state != NULL && the_authctxt != NULL) {
+ do_cleanup(the_active_state, the_authctxt);
+ if (use_privsep && privsep_is_preauth &&
+ pmonitor != NULL && pmonitor->m_pid > 1) {
+ debug("Killing privsep child %d", pmonitor->m_pid);
+ if (kill(pmonitor->m_pid, SIGKILL) != 0 &&
+ errno != ESRCH) {
+ error_f("kill(%d): %s", pmonitor->m_pid,
+ strerror(errno));
+ }
+ }
+ }
+#ifdef SSH_AUDIT_EVENTS
+ /* done after do_cleanup so it can cancel the PAM auth 'thread' */
+ if (the_active_state != NULL && (!use_privsep || mm_is_monitor()))
+ audit_event(the_active_state, SSH_CONNECTION_ABANDON);
+#endif
+ _exit(i);
+}
Index: openssh-8.5p1-new
===================================================================
--- openssh-8.5p1-new (nonexistent)
+++ openssh-8.5p1-new (revision 5)
Property changes on: openssh-8.5p1-new
___________________________________________________________________
Added: svn:ignore
## -0,0 +1,73 ##
+
+# install dir
+dist
+
+# Target build dirs
+.a1x-newlib
+.a2x-newlib
+.at91sam7s-newlib
+
+.build-machine
+
+.a1x-glibc
+.a2x-glibc
+.h3-glibc
+.h5-glibc
+.i586-glibc
+.i686-glibc
+.imx6-glibc
+.jz47xx-glibc
+.makefile
+.am335x-glibc
+.omap543x-glibc
+.p5600-glibc
+.power8-glibc
+.power8le-glibc
+.power9-glibc
+.power9le-glibc
+.m1000-glibc
+.riscv64-glibc
+.rk328x-glibc
+.rk33xx-glibc
+.rk339x-glibc
+.s8xx-glibc
+.s9xx-glibc
+.x86_64-glibc
+
+# Hidden files (each file)
+.makefile
+.dist
+.rootfs
+
+# src & hw requires
+.src_requires
+.src_requires_depend
+.requires
+.requires_depend
+
+# Tarballs
+*.gz
+*.bz2
+*.lz
+*.xz
+*.tgz
+*.txz
+
+# Signatures
+*.asc
+*.sig
+*.sign
+*.sha1sum
+
+# Patches
+*.patch
+
+# Descriptions
+*.dsc
+*.txt
+
+# Default linux config files
+*.defconfig
+
+# backup copies
+*~
Index: .
===================================================================
--- . (nonexistent)
+++ . (revision 5)
Property changes on: .
___________________________________________________________________
Added: svn:ignore
## -0,0 +1,73 ##
+
+# install dir
+dist
+
+# Target build dirs
+.a1x-newlib
+.a2x-newlib
+.at91sam7s-newlib
+
+.build-machine
+
+.a1x-glibc
+.a2x-glibc
+.h3-glibc
+.h5-glibc
+.i586-glibc
+.i686-glibc
+.imx6-glibc
+.jz47xx-glibc
+.makefile
+.am335x-glibc
+.omap543x-glibc
+.p5600-glibc
+.power8-glibc
+.power8le-glibc
+.power9-glibc
+.power9le-glibc
+.m1000-glibc
+.riscv64-glibc
+.rk328x-glibc
+.rk33xx-glibc
+.rk339x-glibc
+.s8xx-glibc
+.s9xx-glibc
+.x86_64-glibc
+
+# Hidden files (each file)
+.makefile
+.dist
+.rootfs
+
+# src & hw requires
+.src_requires
+.src_requires_depend
+.requires
+.requires_depend
+
+# Tarballs
+*.gz
+*.bz2
+*.lz
+*.xz
+*.tgz
+*.txz
+
+# Signatures
+*.asc
+*.sig
+*.sign
+*.sha1sum
+
+# Patches
+*.patch
+
+# Descriptions
+*.dsc
+*.txt
+
+# Default linux config files
+*.defconfig
+
+# backup copies
+*~
Radix cross Linux
The main Radix cross Linux repository contains the build scripts of packages, which have the most complete and common functionality for desktop machines
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2 Branches
1 Tag