AC_INIT(ssh.c)

AC_CONFIG_HEADER(config.h)

dnl Checks for programs.
AC_PROG_CC
AC_PROG_CPP
AC_PROG_RANLIB
AC_PROG_INSTALL
AC_CHECK_PROG(AR, ar, ar)
if test "$GCC" = "yes"; then CFLAGS="$CFLAGS -Wall"; fi

dnl Check for OpenSSL/SSLeay directories.
AC_MSG_CHECKING([for OpenSSL/SSLeay directory])
for ssldir in /usr /usr/local/openssl /usr/lib/openssl /usr/local/ssl /usr/lib/ssl /usr/local $prefix /usr/pkg ; do
	if test -f "$ssldir/include/openssl/crypto.h"; then
		AC_DEFINE(HAVE_OPENSSL)
		GOT_SSL="yes"
		break
	fi
	if test -f "$ssldir/include/ssl/crypto.h"; then
		AC_DEFINE(HAVE_SSL)
		GOT_SSL="yes"
		break
	fi
done
if test -z "$GOT_SSL" ; then
	AC_MSG_ERROR([Could not find SSLeay / OpenSSL libraries, please install])	
fi
AC_SUBST(ssldir)
AC_DEFINE_UNQUOTED(ssldir, "$ssldir")
if test "$ssldir" != "/usr"; then
	CFLAGS="$CFLAGS -I$ssldir/include"
	LIBS="$LIBS -L$ssldir/lib"
fi
LIBS="$LIBS -lssl -lcrypto"
AC_MSG_RESULT($ssldir)

dnl Check for RSAref library.
AC_MSG_CHECKING([for RSAref library])
saved_LIBS="$LIBS"
LIBS="$saved_LIBS -lRSAglue -lrsaref"
AC_TRY_LINK([], [],
[AC_MSG_RESULT(yes); ],
[AC_MSG_RESULT(no)]; LIBS="$saved_LIBS")

dnl Checks for libraries.
AC_CHECK_LIB(crypto, CRYPTO_lock, ,AC_MSG_ERROR([*** libcrypto missing - please install first ***]))
AC_CHECK_LIB(z, deflate, ,AC_MSG_ERROR([*** zlib missing - please install first ***]))
AC_CHECK_LIB(util, login, AC_DEFINE(HAVE_LIBUTIL_LOGIN) LIBS="$LIBS -lutil")
AC_CHECK_LIB(nsl, yp_match, , )
AC_CHECK_LIB(socket, main, , )

dnl libdl is needed by PAM on Redhat systems
AC_CHECK_LIB(dl, dlopen, , )
AC_CHECK_LIB(pam, pam_authenticate, , )

dnl Checks for header files.
AC_CHECK_HEADERS(endian.h lastlog.h login.h maillock.h netgroup.h paths.h pty.h shadow.h util.h utmp.h sys/select.h sys/time.h)

dnl Checks for library functions.
AC_CHECK_FUNCS(arc4random mkdtemp openpty setenv setlogin setproctitle strlcat strlcpy)

AC_CHECK_FUNC(login, 
	[AC_DEFINE(HAVE_LOGIN)],
	[AC_CHECK_LIB(bsd, login, [LIBS="$LIBS -lbsd"; AC_DEFINE(HAVE_LOGIN)])]
)

AC_CHECK_FUNC(daemon, 
	[AC_DEFINE(HAVE_DAEMON)],
	[AC_CHECK_LIB(bsd, daemon, [LIBS="$LIBS -lbsd"; AC_DEFINE(HAVE_DAEMON)])]
)

dnl Checks for data types
AC_CHECK_SIZEOF(short int, 2)
AC_CHECK_SIZEOF(int, 4)
AC_CHECK_SIZEOF(long int, 4)
AC_CHECK_SIZEOF(long long int, 8)

dnl More checks for data types
AC_MSG_CHECKING([for quad_t])
AC_TRY_COMPILE(
	[#include <sys/types.h>], 
	[quad_t a; a = 1235;], 
	[
		AC_DEFINE(HAVE_QUAD_T)
		AC_MSG_RESULT(yes)
	],
	[AC_MSG_RESULT(no)]
) 

AC_MSG_CHECKING([for intXX_t types])
AC_TRY_COMPILE(
	[#include <sys/types.h>], 
	[int16_t a; int32_t b; a = 1235; b = 1235;], 
	[
		AC_DEFINE(HAVE_INTXX_T)
		AC_MSG_RESULT(yes)
	],
	[AC_MSG_RESULT(no)]
) 

AC_MSG_CHECKING([for u_intXX_t types])
AC_TRY_COMPILE(
	[#include <sys/types.h>], 
	[u_int16_t c; u_int32_t d; c = 1235; d = 1235;], 
	[
		AC_DEFINE(HAVE_U_INTXX_T)
		AC_MSG_RESULT(yes)
	],
	[AC_MSG_RESULT(no)]
) 

AC_MSG_CHECKING([For uintXX_t types])
AC_TRY_COMPILE(
	[#include <sys/types.h>], 
	[uint16_t c; uint32_t d; c = 1235; d = 1235;], 
	[
		AC_DEFINE(HAVE_UINTXX_T)
		AC_MSG_RESULT(yes)
	],
	[AC_MSG_RESULT(no)]
) 

dnl Check PAM strerror arguments
AC_MSG_CHECKING([whether pam_strerror takes only one argument])
AC_TRY_COMPILE(
	[
		#include <stdlib.h>
		#include <security/pam_appl.h>
	], 
	[(void)pam_strerror((pam_handle_t *)NULL, -1);], 
	[AC_MSG_RESULT(no)],
	[
		AC_DEFINE(HAVE_OLD_PAM)
		AC_MSG_RESULT(yes)
	]
) 

dnl Check whether use wants to disable the external ssh-askpass
INSTALL_ASKPASS="yes"
AC_MSG_CHECKING([whether to enable external ssh-askpass support])
AC_ARG_WITH(askpass,
	[  --with-askpass=yes/no   Enable external ssh-askpass support (default=yes)],
	[
		if test x$withval = xno ; then
			INSTALL_ASKPASS="no"
		else
			INSTALL_ASKPASS="yes"
		fi
	]
)
if test "x$INSTALL_ASKPASS" = "xyes" ; then
	AC_DEFINE(USE_EXTERNAL_ASKPASS)
	AC_SUBST(INSTALL_ASKPASS)
	AC_MSG_RESULT(yes)
else
	AC_MSG_RESULT(no)
fi

if test "x$INSTALL_ASKPASS" = "xyes" ; then
	AC_MSG_CHECKING([whether to build GNOME ssh-askpass])
	dnl Check whether user wants GNOME ssh-askpass
	AC_ARG_WITH(gnome-askpass,
		[  --with-gnome-askpass    Build the GNOME passphrase requester (default=no)],
		[
			if test x$withval = xno ; then
				GNOME_ASKPASS="";
			else
				GNOME_ASKPASS="gnome-ssh-askpass";
			fi
		])
	AC_SUBST(GNOME_ASKPASS)

	if test -z "$GNOME_ASKPASS" ; then
		AC_MSG_RESULT(no)
	else
		AC_MSG_RESULT(yes)
	fi
fi

dnl Check for user-specified random device
AC_ARG_WITH(random,
	[  --with-random=FILE      read randomness from FILE (default=/dev/urandom)],
	[
		RANDOM_POOL="$withval";
		AC_DEFINE_UNQUOTED(RANDOM_POOL, "$RANDOM_POOL")
	],
	[
		dnl Check for random device
		AC_CHECK_FILE("/dev/urandom",
			[
				RANDOM_POOL="/dev/urandom"; 
				AC_SUBST(RANDOM_POOL)
				AC_DEFINE_UNQUOTED(RANDOM_POOL, "$RANDOM_POOL")
			]
		)
	]
)

dnl Check for EGD pool file
AC_ARG_WITH(egd-pool,
	[  --with-egd-pool=FILE    read randomness from EGD pool FILE (default none)],
	[
		RANDOM_POOL="$withval";
		AC_DEFINE(HAVE_EGD)
		AC_SUBST(RANDOM_POOL)
		AC_DEFINE_UNQUOTED(RANDOM_POOL, "$RANDOM_POOL")
	]
)

dnl Make sure we have random number support
if test -z "$RANDOM_POOL" -a -z "$EGD_POOL"; then
	AC_MSG_ERROR([No random device found, and no EGD random pool specified])
fi

dnl Check for ut_host field in utmp
AC_MSG_CHECKING([whether utmp.h has ut_host field])
AC_EGREP_HEADER(ut_host, utmp.h, 
	[AC_DEFINE(HAVE_HOST_IN_UTMP) AC_MSG_RESULT(yes); ], 
	[AC_MSG_RESULT(no)]
)

dnl Look for lastlog location
AC_MSG_CHECKING([location of lastlog file])
for lastlog in /var/log/lastlog /var/adm/lastlog /etc/security/lastlog ; do
	if test -f $lastlog ; then
		gotlastlog="file"
		break
	fi
	if test -d $lastlog ; then
		gotlastlog="dir"
		break
	fi
done
if test -z "$gotlastlog" ; then
	AC_MSG_ERROR([*** Cannot find lastlog ***])
else
	if test "x$gotlastlog" = "xdir" ; then
		AC_DEFINE(LASTLOG_IS_DIR)
		AC_MSG_ERROR([*** Directory-based lastlogs are not yet supported ***])
	fi
	AC_MSG_RESULT($lastlog)
	AC_DEFINE_UNQUOTED(LASTLOG_LOCATION, "$lastlog")
fi	

AC_MSG_CHECKING([whether libc defines __progname])
AC_TRY_LINK([], 
	[extern char *__progname; printf("%s", __progname);], 
	[
		AC_DEFINE(HAVE___PROGNAME)
		AC_MSG_RESULT(yes)
	], 
	[
		AC_MSG_RESULT(no)
	]
)

dnl Check whether user wants Kerberos support
AC_ARG_WITH(kerberos4,
	[  --with-kerberos4        Enable Kerberos 4 support],
	[
		AC_DEFINE(KRB4)
		LIBS="$LIBS -lkrb"
		CFLAGS="$CFLAGS -I/usr/include/kerberosIV"
	]
)

dnl Check whether user wants AFS support
AC_ARG_WITH(afs,
	[  --with-afs              Enable AFS support],
	[
		AC_DEFINE(AFS)
		LIBS="$LIBS -lkafs"
	]
)

dnl Check whether user wants S/Key support
AC_ARG_WITH(skey,
	[  --with-skey             Enable S/Key support],
	[
		AC_DEFINE(SKEY)
		LIBS="$LIBS -lskey"
	]
)

dnl Check whether user wants TCP wrappers support
AC_ARG_WITH(tcp-wrappers,
	[  --with-tcp-wrappers     Enable tcpwrappers support],
	[
		AC_DEFINE(LIBWRAP)
		LIBS="$LIBS -lwrap"
	]
)

dnl Check whether to enable MD5 passwords
AC_ARG_WITH(md5-passwords,
	[  --with-md5-passwords    Enable use of MD5 passwords],
	[AC_DEFINE(HAVE_MD5_PASSWORDS)]
)

AC_OUTPUT(Makefile)