LIBSELINUX=@LIBSELINUX@

# 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

		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" ],

		    AC_MSG_ERROR(SELinux support requires libselinux library))

		AC_CHECK_FUNCS(getseuserbyname get_default_context_with_level)

	fi ]

)

AC_SUBST(LIBSELINUX)

echo "                   SELinux support: $SELINUX_MSG"

	ssh_selinux_setup_exec_context(pw->pw_name);

	ssh_selinux_setup_pty(pw->pw_name, tty);

			if [ -x /sbin/restorecon ]; then

			    /sbin/restorecon $RSA1_KEY.pub

			fi

			if [ -x /sbin/restorecon ]; then

			    /sbin/restorecon $RSA_KEY.pub

			fi

			if [ -x /sbin/restorecon ]; then

			    /sbin/restorecon $DSA_KEY.pub

			fi

#include "port-linux.h"

/* $Id$ */

/*

 * Copyright (c) 2006 Damien Miller <djm@openbsd.org>

 *

 * 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.

 */

/*

 * Linux-specified portability code - just SELinux support at present

 * 

 * SELinux support based on patch from Daniel Walsh <dwalsh AT redhat.com>

 * http://bugzilla.mindrot.org/show_bug.cgi?id=880

 */

#include "includes.h"

#ifdef WITH_SELINUX

#include "log.h"

#include "port-linux.h"

#include <selinux/selinux.h>

#include <selinux/flask.h>

#include <selinux/get_context_list.h>

/* Wrapper around is_selinux_enabled() to log its return value once only */

static int

ssh_selinux_enabled(void)

{

	static int enabled = -1;

	if (enabled == -1) {

		enabled = is_selinux_enabled();

		debug("SELinux support %s", enabled ? "enabled" : "disabled");

	}

	return (enabled);

}

/* Return the default security context for the given username */

static security_context_t

ssh_selinux_getctxbyname(char *pwname)

{

	security_context_t sc;

	char *sename = NULL, *lvl = NULL;

#ifdef HAVE_GETSEUSERBYNAME

	if (getseuserbyname(pwname, &sename, &lvl) != 0)

		return NULL;

#else

	sename = pwname;

	lvl = NULL;

#endif

#ifdef HAVE_GET_DEFAULT_CONTEXT_WITH_LEVEL

	if (get_default_context_with_level(sename, lvl, NULL, &sc) != 0) {

#else

	if (get_default_context(sename, NULL, &sc) != 0) {

#endif

		switch (security_getenforce()) {

		case -1:

			fatal("%s: ssh_selinux_getctxbyname: "

			    "security_getenforce() failed", __func__);

		case 0:

			error("%s: Failed to get default SELinux security "

			    "context for %s", __func__, pwname);

		default:

			fatal("%s: Failed to get default SELinux security "

			    "context for %s (in enforcing mode)",

			    __func__, pwname);

		}

	}

#ifdef HAVE_GETSEUSERBYNAME

	if (sename != NULL)

		xfree(sename);

	if (lvl != NULL)

		xfree(lvl);

#endif

	return (sc);

}

/* Set the execution context to the default for the specified user */

void

ssh_selinux_setup_exec_context(char *pwname)

{

	security_context_t user_ctx = NULL;

	if (!ssh_selinux_enabled())

		return;

	debug3("%s: setting execution context", __func__);

	user_ctx = ssh_selinux_getctxbyname(pwname);

	if (setexeccon(user_ctx) != 0) {

		switch (security_getenforce()) {

		case -1:

			fatal("%s: security_getenforce() failed", __func__);

		case 0:

			error("%s: Failed to set SELinux execution "

			    "context for %s", __func__, pwname);

		default:

			fatal("%s: Failed to set SELinux execution context "

			    "for %s (in enforcing mode)", __func__, pwname);

		}

	}

	if (user_ctx != NULL)

		freecon(user_ctx);

	debug3("%s: done", __func__);

}

/* Set the TTY context for the specified user */

void

ssh_selinux_setup_pty(char *pwname, const char *tty)

{

	security_context_t new_tty_ctx = NULL;

	security_context_t user_ctx = NULL;

	security_context_t old_tty_ctx = NULL;

	if (!ssh_selinux_enabled())

		return;

	debug3("%s: setting TTY context on %s", __func__, tty);

	user_ctx = ssh_selinux_getctxbyname(pwname);

	/* XXX: should these calls fatal() upon failure in enforcing mode? */

	if (getfilecon(tty, &old_tty_ctx) == -1) {

		error("%s: getfilecon: %s", __func__, strerror(errno));

		goto out;

	}

	if (security_compute_relabel(user_ctx, old_tty_ctx,

	    SECCLASS_CHR_FILE, &new_tty_ctx) != 0) {

		error("%s: security_compute_relabel: %s",

		    __func__, strerror(errno));

		goto out;

	}

	if (setfilecon(tty, new_tty_ctx) != 0)

		error("%s: setfilecon: %s", __func__, strerror(errno));

 out:

	if (new_tty_ctx != NULL)

		freecon(new_tty_ctx);

	if (old_tty_ctx != NULL)

		freecon(old_tty_ctx);

	if (user_ctx != NULL)

		freecon(user_ctx);

	debug3("%s: done", __func__);

}

#endif /* WITH_SELINUX */

/* $Id$ */

/*

 * Copyright (c) 2006 Damien Miller <djm@openbsd.org>

 *

 * 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.

 */

#ifndef _PORT_LINUX_H

#define _PORT_LINUX_H

#ifdef WITH_SELINUX

void ssh_selinux_setup_pty(char *, const char *);

void ssh_selinux_setup_exec_context(char *);

#else

# define ssh_selinux_setup_pty(a, b)

# define ssh_selinux_setup_exec_context(a)

#endif

#endif /* ! _PORT_LINUX_H */