diff -up openssh-5.9p1/Makefile.in.sesandbox openssh-5.9p1/Makefile.in

--- openssh-5.9p1/Makefile.in.sesandbox	2011-09-19 04:10:05.706521484 +0200

+++ openssh-5.9p1/Makefile.in	2011-09-19 04:10:15.092646473 +0200

@@ -90,7 +90,7 @@ SSHDOBJS=sshd.o auth-rhosts.o auth-passw

 	loginrec.o auth-pam.o auth-shadow.o auth-sia.o md5crypt.o \

 	sftp-server.o sftp-common.o \

 	roaming_common.o roaming_serv.o \

-	sandbox-null.o sandbox-rlimit.o sandbox-systrace.o sandbox-darwin.o

+	sandbox-null.o sandbox-rlimit.o sandbox-systrace.o sandbox-darwin.o sandbox-selinux.o

 MANPAGES	= moduli.5.out scp.1.out ssh-add.1.out ssh-agent.1.out ssh-keygen.1.out ssh-keyscan.1.out ssh.1.out sshd.8.out sftp-server.8.out sftp.1.out ssh-keysign.8.out ssh-pkcs11-helper.8.out sshd_config.5.out ssh_config.5.out

 MANPAGES_IN	= moduli.5 scp.1 ssh-add.1 ssh-agent.1 ssh-keygen.1 ssh-keyscan.1 ssh.1 sshd.8 sftp-server.8 sftp.1 ssh-keysign.8 ssh-pkcs11-helper.8 sshd_config.5 ssh_config.5

diff -up openssh-5.9p1/configure.ac.sesandbox openssh-5.9p1/configure.ac

--- openssh-5.9p1/configure.ac.sesandbox	2011-08-18 06:48:24.000000000 +0200

+++ openssh-5.9p1/configure.ac	2011-09-19 04:10:15.193521356 +0200

@@ -2476,7 +2476,7 @@ AC_SUBST([SSH_PRIVSEP_USER])

 # Decide which sandbox style to use

 sandbox_arg=""

 AC_ARG_WITH([sandbox],

-	[  --with-sandbox=style    Specify privilege separation sandbox (no, darwin, rlimit, systrace)],

+	[  --with-sandbox=style    Specify privilege separation sandbox (no, darwin, rlimit, systrace, selinux)],

 	[

 		if test "x$withval" = "xyes" ; then

 			sandbox_arg=""

@@ -2499,6 +2499,10 @@ elif test "x$sandbox_arg" = "xdarwin" ||

 		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" = "xselinux"  || \

+    test "x$WITH_SELINUX" = "x1"; then

+	SANDBOX_STYLE="selinux"

+	AC_DEFINE([SANDBOX_SELINUX], [1], [Sandbox using selinux(8)])

 elif test "x$sandbox_arg" = "xrlimit" || \

      ( test -z "$sandbox_arg" && test "x$ac_cv_func_setrlimit" = "xyes" ) ; then

 	test "x$ac_cv_func_setrlimit" != "xyes" && \

diff -up openssh-5.9p1/openbsd-compat/port-linux.c.sesandbox openssh-5.9p1/openbsd-compat/port-linux.c

--- openssh-5.9p1/openbsd-compat/port-linux.c.sesandbox	2011-09-19 04:10:14.731521450 +0200

+++ openssh-5.9p1/openbsd-compat/port-linux.c	2011-09-19 04:10:15.292521265 +0200

@@ -459,24 +459,24 @@ ssh_selinux_setup_pty(char *pwname, cons

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

 }

-void

+int

 ssh_selinux_change_context(const char *newname)

 {

-	int len, newlen;

+	int len, newlen, rv = -1;

 	char *oldctx, *newctx, *cx;

 	void (*switchlog) (const char *fmt,...) = logit;

 	if (!ssh_selinux_enabled())

-		return;

+		return -2;

 	if (getcon((security_context_t *)&oldctx) < 0) {

 		logit("%s: getcon failed with %s", __func__, strerror(errno));

-		return;

+		return -1;

 	}

 	if ((cx = index(oldctx, ':')) == NULL || (cx = index(cx + 1, ':')) ==

 	    NULL) {

 		logit ("%s: unparseable context %s", __func__, oldctx);

-		return;

+		return -1;

 	}

 	/*

@@ -484,8 +484,10 @@ ssh_selinux_change_context(const char *n

 	 * security context.

 	 */

 	if (strncmp(cx, SSH_SELINUX_UNCONFINED_TYPE,

-	    sizeof(SSH_SELINUX_UNCONFINED_TYPE) - 1) == 0)

+	    sizeof(SSH_SELINUX_UNCONFINED_TYPE) - 1) == 0) {

 		switchlog = debug3;

+		rv = -2;

+	}

 	newlen = strlen(oldctx) + strlen(newname) + 1;

 	newctx = xmalloc(newlen);

@@ -499,8 +501,11 @@ ssh_selinux_change_context(const char *n

 	if (setcon(newctx) < 0)

 		switchlog("%s: setcon %s from %s failed with %s", __func__,

 		    newctx, oldctx, strerror(errno));

+	else

+		rv = 0;

 	xfree(oldctx);

 	xfree(newctx);

+	return rv;

 }

 void

diff -up openssh-5.9p1/openbsd-compat/port-linux.h.sesandbox openssh-5.9p1/openbsd-compat/port-linux.h

--- openssh-5.9p1/openbsd-compat/port-linux.h.sesandbox	2011-09-19 04:10:14.817647868 +0200

+++ openssh-5.9p1/openbsd-compat/port-linux.h	2011-09-19 04:10:15.401648009 +0200

@@ -23,7 +23,7 @@

 int ssh_selinux_enabled(void);

 void ssh_selinux_setup_pty(char *, const char *);

 void ssh_selinux_setup_exec_context(char *);

-void ssh_selinux_change_context(const char *);

+int ssh_selinux_change_context(const char *);

 void ssh_selinux_chopy_context(void);

 void ssh_selinux_setfscreatecon(const char *);

 #endif

diff -up openssh-5.9p1/sandbox-darwin.c.sesandbox openssh-5.9p1/sandbox-darwin.c

--- openssh-5.9p1/sandbox-darwin.c.sesandbox	2011-06-26 23:18:21.000000000 +0200

+++ openssh-5.9p1/sandbox-darwin.c	2011-09-19 04:10:15.490523231 +0200

@@ -83,6 +83,12 @@ ssh_sandbox_child(struct ssh_sandbox *bo

 }

 void

+ssh_sandbox_privileged_child(struct ssh_sandbox *box)

+{

+	/* empty */

+}

+

+void

 ssh_sandbox_parent_finish(struct ssh_sandbox *box)

 {

 	free(box);

diff -up openssh-5.9p1/sandbox-null.c.sesandbox openssh-5.9p1/sandbox-null.c

--- openssh-5.9p1/sandbox-null.c.sesandbox	2011-06-23 11:45:51.000000000 +0200

+++ openssh-5.9p1/sandbox-null.c	2011-09-19 04:10:15.599458687 +0200

@@ -58,6 +58,12 @@ ssh_sandbox_child(struct ssh_sandbox *bo

 }

 void

+ssh_sandbox_privileged_child(struct ssh_sandbox *box)

+{

+	/* empty */

+}

+

+void

 ssh_sandbox_parent_finish(struct ssh_sandbox *box)

 {

 	free(box);

diff -up openssh-5.9p1/sandbox-rlimit.c.sesandbox openssh-5.9p1/sandbox-rlimit.c

--- openssh-5.9p1/sandbox-rlimit.c.sesandbox	2011-06-23 11:45:51.000000000 +0200

+++ openssh-5.9p1/sandbox-rlimit.c	2011-09-19 04:10:16.077647289 +0200

@@ -78,6 +78,12 @@ ssh_sandbox_child(struct ssh_sandbox *bo

 }

 void

+ssh_sandbox_privileged_child(struct ssh_sandbox *box)

+{

+	/* empty */

+}

+

+void

 ssh_sandbox_parent_finish(struct ssh_sandbox *box)

 {

 	free(box);

diff -up openssh-5.9p1/sandbox-selinux.c.sesandbox openssh-5.9p1/sandbox-selinux.c

--- openssh-5.9p1/sandbox-selinux.c.sesandbox	2011-09-19 04:10:16.179526059 +0200

+++ openssh-5.9p1/sandbox-selinux.c	2011-09-19 04:39:00.058646230 +0200

@@ -0,0 +1,122 @@

+/* $Id: sandbox-selinux.c,v 1.0 2011/01/17 10:15:30 jfch Exp $ */

+ 

+/*

+ * Copyright 2011 Red Hat, Inc.  All rights reserved.

+ * Use is subject to license terms.

+ *

+ * 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.

+ *

+ * Red Hat author: Jan F. Chadima <jchadima@redhat.com>

+ */

+

+

+#include "includes.h"

+

+#ifdef SANDBOX_SELINUX

+

+#include <sys/types.h>

+

+#include <errno.h>

+#include <stdarg.h>

+#include <stdio.h>

+#include <stdlib.h>

+#include <string.h>

+#include <unistd.h>

+#include <sys/resource.h>

+

+#include "log.h"

+#include "ssh-sandbox.h"

+#include "xmalloc.h"

+#include "openbsd-compat/port-linux.h"

+

+/* selinux based sandbox */

+

+struct ssh_sandbox {

+	pid_t child_pid;

+};

+

+struct ssh_sandbox *

+ssh_sandbox_init(void)

+{

+	struct ssh_sandbox *box;

+

+	/*

+	 * Strictly, we don't need to maintain any state here but we need

+	 * to return non-NULL to satisfy the API.

+	 */

+	debug3("selinux sandbox init");

+	box = xcalloc(1, sizeof(*box));

+	box->child_pid = 0;

+	return box;

+}

+

+void

+ssh_sandbox_child(struct ssh_sandbox *box)

+{

+	struct rlimit rl_zero;

+

+	rl_zero.rlim_cur = rl_zero.rlim_max = 0;

+

+	if (setrlimit(RLIMIT_FSIZE, &rl_zero) == -1)

+		fatal("%s: setrlimit(RLIMIT_FSIZE, { 0, 0 }): %s",

+			__func__, strerror(errno));

+	if (setrlimit(RLIMIT_NOFILE, &rl_zero) == -1)

+		fatal("%s: setrlimit(RLIMIT_NOFILE, { 0, 0 }): %s",

+			__func__, strerror(errno));

+#ifdef HAVE_RLIMIT_NPROC

+	if (setrlimit(RLIMIT_NPROC, &rl_zero) == -1)

+		fatal("%s: setrlimit(RLIMIT_NPROC, { 0, 0 }): %s",

+			__func__, strerror(errno));

+#endif

+}

+

+void

+ssh_sandbox_privileged_child(struct ssh_sandbox *box)

+{

+	switch (ssh_selinux_change_context("sshd_net_t")) {

+	case 0:

+		debug3("selinux sandbox child sucessfully enabled");

+		break;

+	case -2:

+		logit("selinux sandbox not useful");

+		break;

+	case -1:

+		fatal("cannot set up selinux sandbox");

+	default:

+		fatal("inmternal error in selinux sandbox");

+	}

+}

+

+void

+ssh_sandbox_parent_finish(struct ssh_sandbox *box)

+{

+	free(box);

+	debug3("%s: finished", __func__);

+}

+

+void

+ssh_sandbox_parent_preauth(struct ssh_sandbox *box, pid_t child_pid)

+{

+	debug3("selinux sandbox parent sucessfully enabled");

+	box->child_pid = child_pid;

+}

+

+#endif /* SANDBOX_NULL */

diff -up openssh-5.9p1/sandbox-systrace.c.sesandbox openssh-5.9p1/sandbox-systrace.c

--- openssh-5.9p1/sandbox-systrace.c.sesandbox	2011-08-05 22:16:23.000000000 +0200

+++ openssh-5.9p1/sandbox-systrace.c	2011-09-19 04:10:16.268646532 +0200

@@ -109,6 +109,12 @@ ssh_sandbox_child(struct ssh_sandbox *bo

 	close(box->child_sock);

 }

+void

+ssh_sandbox_privileged_child(struct ssh_sandbox *box)

+{

+	/* empty */

+}

+

 static void

 ssh_sandbox_parent(struct ssh_sandbox *box, pid_t child_pid,

     const struct sandbox_policy *allowed_syscalls)

diff -up openssh-5.9p1/ssh-sandbox.h.sesandbox openssh-5.9p1/ssh-sandbox.h

--- openssh-5.9p1/ssh-sandbox.h.sesandbox	2011-06-23 11:45:51.000000000 +0200

+++ openssh-5.9p1/ssh-sandbox.h	2011-09-19 04:10:16.392523931 +0200

@@ -19,5 +19,6 @@ struct ssh_sandbox;

 struct ssh_sandbox *ssh_sandbox_init(void);

 void ssh_sandbox_child(struct ssh_sandbox *);

+void ssh_sandbox_privileged_child(struct ssh_sandbox *);

 void ssh_sandbox_parent_finish(struct ssh_sandbox *);

 void ssh_sandbox_parent_preauth(struct ssh_sandbox *, pid_t);

diff -up openssh-5.9p1/sshd.c.sesandbox openssh-5.9p1/sshd.c

--- openssh-5.9p1/sshd.c.sesandbox	2011-09-19 04:10:14.564467584 +0200

+++ openssh-5.9p1/sshd.c	2011-09-19 04:36:43.324520132 +0200

@@ -728,10 +730,12 @@ privsep_preauth(Authctxt *authctxt)

 		set_log_handler(mm_log_handler, pmonitor);

 		/* Demote the child */

-		if (getuid() == 0 || geteuid() == 0)

+		if (getuid() == 0 || geteuid() == 0) {

+			ssh_sandbox_privileged_child(box);

 			privsep_preauth_child();

+		}

 		setproctitle("%s", "[net]");

 		if (box != NULL) {

 			ssh_sandbox_child(box);

 			xfree(box);

 		}