openssh/openssh-5.9p1-role.patch

diff -up openssh-5.9p0/auth-pam.c.role openssh-5.9p0/auth-pam.c
--- openssh-5.9p0/auth-pam.c.role	2009-07-12 14:07:21.000000000 +0200
+++ openssh-5.9p0/auth-pam.c	2011-08-31 11:42:54.870087433 +0200
@@ -1069,7 +1069,7 @@ is_pam_session_open(void)
  * during the ssh authentication process.
  */
 int
-do_pam_putenv(char *name, char *value)
+do_pam_putenv(char *name, const char *value)
 {
 	int ret = 1;
 #ifdef HAVE_PAM_PUTENV
diff -up openssh-5.9p0/auth-pam.h.role openssh-5.9p0/auth-pam.h
--- openssh-5.9p0/auth-pam.h.role	2004-09-11 14:17:26.000000000 +0200
+++ openssh-5.9p0/auth-pam.h	2011-08-31 11:42:54.979086333 +0200
@@ -38,7 +38,7 @@ void do_pam_session(void);
 void do_pam_set_tty(const char *);
 void do_pam_setcred(int );
 void do_pam_chauthtok(void);
-int do_pam_putenv(char *, char *);
+int do_pam_putenv(char *, const char *);
 char ** fetch_pam_environment(void);
 char ** fetch_pam_child_environment(void);
 void free_pam_environment(char **);
diff -up openssh-5.9p0/auth.h.role openssh-5.9p0/auth.h
--- openssh-5.9p0/auth.h.role	2011-08-31 11:42:47.760024631 +0200
+++ openssh-5.9p0/auth.h	2011-08-31 11:42:55.090151027 +0200
@@ -59,6 +59,9 @@ struct Authctxt {
 	char		*service;
 	struct passwd	*pw;		/* set if 'valid' */
 	char		*style;
+#ifdef WITH_SELINUX
+	char		*role;
+#endif
 	void		*kbdintctxt;
 	void		*jpake_ctx;
 #ifdef BSD_AUTH
diff -up openssh-5.9p0/auth1.c.role openssh-5.9p0/auth1.c
--- openssh-5.9p0/auth1.c.role	2010-08-31 14:36:39.000000000 +0200
+++ openssh-5.9p0/auth1.c	2011-08-31 11:42:55.215033075 +0200
@@ -384,6 +384,9 @@ do_authentication(Authctxt *authctxt)
 {
 	u_int ulen;
 	char *user, *style = NULL;
+#ifdef WITH_SELINUX
+	char *role=NULL;
+#endif
 
 	/* Get the name of the user that we wish to log in as. */
 	packet_read_expect(SSH_CMSG_USER);
@@ -392,11 +395,24 @@ do_authentication(Authctxt *authctxt)
 	user = packet_get_cstring(&ulen);
 	packet_check_eom();
 
+#ifdef WITH_SELINUX
+	if ((role = strchr(user, '/')) != NULL)
+		*role++ = '\0';
+#endif
+
 	if ((style = strchr(user, ':')) != NULL)
 		*style++ = '\0';
+#ifdef WITH_SELINUX
+	else
+		if (role && (style = strchr(role, ':')) != NULL)
+			*style++ = '\0';
+#endif
 
 	authctxt->user = user;
 	authctxt->style = style;
+#ifdef WITH_SELINUX
+	authctxt->role = role;
+#endif
 
 	/* Verify that the user is a valid user. */
 	if ((authctxt->pw = PRIVSEP(getpwnamallow(user))) != NULL)
diff -up openssh-5.9p0/auth2-gss.c.role openssh-5.9p0/auth2-gss.c
--- openssh-5.9p0/auth2-gss.c.role	2011-05-05 06:04:11.000000000 +0200
+++ openssh-5.9p0/auth2-gss.c	2011-08-31 11:42:55.313025576 +0200
@@ -260,6 +260,7 @@ input_gssapi_mic(int type, u_int32_t ple
 	Authctxt *authctxt = ctxt;
 	Gssctxt *gssctxt;
 	int authenticated = 0;
+	char *micuser;
 	Buffer b;
 	gss_buffer_desc mic, gssbuf;
 	u_int len;
@@ -272,7 +273,13 @@ input_gssapi_mic(int type, u_int32_t ple
 	mic.value = packet_get_string(&len);
 	mic.length = len;
 
-	ssh_gssapi_buildmic(&b, authctxt->user, authctxt->service,
+#ifdef WITH_SELINUX
+	if (authctxt->role && (strlen(authctxt->role) > 0))
+		xasprintf(&micuser, "%s/%s", authctxt->user, authctxt->role);
+	else
+#endif
+		micuser = authctxt->user;
+	ssh_gssapi_buildmic(&b, micuser, authctxt->service,
 	    "gssapi-with-mic");
 
 	gssbuf.value = buffer_ptr(&b);
@@ -284,6 +291,8 @@ input_gssapi_mic(int type, u_int32_t ple
 		logit("GSSAPI MIC check failed");
 
 	buffer_free(&b);
+	if (micuser != authctxt->user)
+		xfree(micuser);
 	xfree(mic.value);
 
 	authctxt->postponed = 0;
diff -up openssh-5.9p0/auth2-hostbased.c.role openssh-5.9p0/auth2-hostbased.c
--- openssh-5.9p0/auth2-hostbased.c.role	2011-08-31 11:42:47.863023264 +0200
+++ openssh-5.9p0/auth2-hostbased.c	2011-08-31 11:42:55.421024814 +0200
@@ -106,7 +106,15 @@ userauth_hostbased(Authctxt *authctxt)
 	buffer_put_string(&b, session_id2, session_id2_len);
 	/* reconstruct packet */
 	buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST);
-	buffer_put_cstring(&b, authctxt->user);
+#ifdef WITH_SELINUX
+	if (authctxt->role) {
+		buffer_put_int(&b, strlen(authctxt->user)+strlen(authctxt->role)+1);
+		buffer_append(&b, authctxt->user, strlen(authctxt->user));
+		buffer_put_char(&b, '/');
+		buffer_append(&b, authctxt->role, strlen(authctxt->role));
+	} else 
+#endif
+		buffer_put_cstring(&b, authctxt->user);
 	buffer_put_cstring(&b, service);
 	buffer_put_cstring(&b, "hostbased");
 	buffer_put_string(&b, pkalg, alen);
diff -up openssh-5.9p0/auth2-pubkey.c.role openssh-5.9p0/auth2-pubkey.c
--- openssh-5.9p0/auth2-pubkey.c.role	2011-08-31 11:42:47.978087418 +0200
+++ openssh-5.9p0/auth2-pubkey.c	2011-08-31 11:42:55.551025263 +0200
@@ -121,7 +121,15 @@ userauth_pubkey(Authctxt *authctxt)
 		}
 		/* reconstruct packet */
 		buffer_put_char(&b, SSH2_MSG_USERAUTH_REQUEST);
-		buffer_put_cstring(&b, authctxt->user);
+#ifdef WITH_SELINUX
+		if (authctxt->role) {
+			buffer_put_int(&b, strlen(authctxt->user)+strlen(authctxt->role)+1);
+			buffer_append(&b, authctxt->user, strlen(authctxt->user));
+			buffer_put_char(&b, '/');
+			buffer_append(&b, authctxt->role, strlen(authctxt->role));
+		} else 
+#endif
+			buffer_put_cstring(&b, authctxt->user);
 		buffer_put_cstring(&b,
 		    datafellows & SSH_BUG_PKSERVICE ?
 		    "ssh-userauth" :
diff -up openssh-5.9p0/auth2.c.role openssh-5.9p0/auth2.c
--- openssh-5.9p0/auth2.c.role	2011-08-31 11:42:45.409026065 +0200
+++ openssh-5.9p0/auth2.c	2011-08-31 11:42:55.676024869 +0200
@@ -216,6 +216,9 @@ input_userauth_request(int type, u_int32
 	Authctxt *authctxt = ctxt;
 	Authmethod *m = NULL;
 	char *user, *service, *method, *style = NULL;
+#ifdef WITH_SELINUX
+	char *role = NULL;
+#endif
 	int authenticated = 0;
 
 	if (authctxt == NULL)
@@ -227,6 +230,11 @@ input_userauth_request(int type, u_int32
 	debug("userauth-request for user %s service %s method %s", user, service, method);
 	debug("attempt %d failures %d", authctxt->attempt, authctxt->failures);
 
+#ifdef WITH_SELINUX
+	if ((role = strchr(user, '/')) != NULL)
+		*role++ = 0;
+#endif
+
 	if ((style = strchr(user, ':')) != NULL)
 		*style++ = 0;
 
@@ -249,8 +257,15 @@ input_userauth_request(int type, u_int32
 		    use_privsep ? " [net]" : "");
 		authctxt->service = xstrdup(service);
 		authctxt->style = style ? xstrdup(style) : NULL;
-		if (use_privsep)
+#ifdef WITH_SELINUX
+		authctxt->role = role ? xstrdup(role) : NULL;
+#endif
+		if (use_privsep) {
 			mm_inform_authserv(service, style);
+#ifdef WITH_SELINUX
+			mm_inform_authrole(role);
+#endif
+		}
 		userauth_banner();
 	} else if (strcmp(user, authctxt->user) != 0 ||
 	    strcmp(service, authctxt->service) != 0) {
diff -up openssh-5.9p0/monitor.c.role openssh-5.9p0/monitor.c
--- openssh-5.9p0/monitor.c.role	2011-08-31 11:42:53.301024819 +0200
+++ openssh-5.9p0/monitor.c	2011-08-31 11:42:55.796025812 +0200
@@ -148,6 +148,9 @@ int mm_answer_sign(int, Buffer *);
 int mm_answer_pwnamallow(int, Buffer *);
 int mm_answer_auth2_read_banner(int, Buffer *);
 int mm_answer_authserv(int, Buffer *);
+#ifdef WITH_SELINUX
+int mm_answer_authrole(int, Buffer *);
+#endif
 int mm_answer_authpassword(int, Buffer *);
 int mm_answer_bsdauthquery(int, Buffer *);
 int mm_answer_bsdauthrespond(int, Buffer *);
@@ -231,6 +234,9 @@ struct mon_table mon_dispatch_proto20[]
     {MONITOR_REQ_SIGN, MON_ONCE, mm_answer_sign},
     {MONITOR_REQ_PWNAM, MON_ONCE, mm_answer_pwnamallow},
     {MONITOR_REQ_AUTHSERV, MON_ONCE, mm_answer_authserv},
+#ifdef WITH_SELINUX
+    {MONITOR_REQ_AUTHROLE, MON_ONCE, mm_answer_authrole},
+#endif
     {MONITOR_REQ_AUTH2_READ_BANNER, MON_ONCE, mm_answer_auth2_read_banner},
     {MONITOR_REQ_AUTHPASSWORD, MON_AUTH, mm_answer_authpassword},
 #ifdef USE_PAM
@@ -819,6 +825,9 @@ mm_answer_pwnamallow(int sock, Buffer *m
 	else {
 		/* Allow service/style information on the auth context */
 		monitor_permit(mon_dispatch, MONITOR_REQ_AUTHSERV, 1);
+#ifdef WITH_SELINUX
+		monitor_permit(mon_dispatch, MONITOR_REQ_AUTHROLE, 1);
+#endif
 		monitor_permit(mon_dispatch, MONITOR_REQ_AUTH2_READ_BANNER, 1);
 	}
 #ifdef USE_PAM
@@ -862,6 +871,25 @@ mm_answer_authserv(int sock, Buffer *m)
 	return (0);
 }
 
+#ifdef WITH_SELINUX
+int
+mm_answer_authrole(int sock, Buffer *m)
+{
+	monitor_permit_authentications(1);
+
+	authctxt->role = buffer_get_string(m, NULL);
+	debug3("%s: role=%s",
+	    __func__, authctxt->role);
+
+	if (strlen(authctxt->role) == 0) {
+		xfree(authctxt->role);
+		authctxt->role = NULL;
+	}
+
+	return (0);
+}
+#endif
+
 int
 mm_answer_authpassword(int sock, Buffer *m)
 {
@@ -1227,7 +1255,7 @@ static int
 monitor_valid_userblob(u_char *data, u_int datalen)
 {
 	Buffer b;
-	char *p;
+	char *p, *r;
 	u_int len;
 	int fail = 0;
 
@@ -1253,6 +1281,8 @@ monitor_valid_userblob(u_char *data, u_i
 	if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST)
 		fail++;
 	p = buffer_get_string(&b, NULL);
+	if ((r = strchr(p, '/')) != NULL)
+		*r = '\0';
 	if (strcmp(authctxt->user, p) != 0) {
 		logit("wrong user name passed to monitor: expected %s != %.100s",
 		    authctxt->user, p);
@@ -1284,7 +1314,7 @@ monitor_valid_hostbasedblob(u_char *data
     char *chost)
 {
 	Buffer b;
-	char *p;
+	char *p, *r;
 	u_int len;
 	int fail = 0;
 
@@ -1301,6 +1331,8 @@ monitor_valid_hostbasedblob(u_char *data
 	if (buffer_get_char(&b) != SSH2_MSG_USERAUTH_REQUEST)
 		fail++;
 	p = buffer_get_string(&b, NULL);
+	if ((r = strchr(p, '/')) != NULL)
+		*r = '\0';
 	if (strcmp(authctxt->user, p) != 0) {
 		logit("wrong user name passed to monitor: expected %s != %.100s",
 		    authctxt->user, p);
diff -up openssh-5.9p0/monitor.h.role openssh-5.9p0/monitor.h
--- openssh-5.9p0/monitor.h.role	2011-08-31 11:42:53.409025333 +0200
+++ openssh-5.9p0/monitor.h	2011-08-31 11:42:55.889024801 +0200
@@ -31,6 +31,9 @@
 enum monitor_reqtype {
 	MONITOR_REQ_MODULI, MONITOR_ANS_MODULI,
 	MONITOR_REQ_FREE, MONITOR_REQ_AUTHSERV,
+#ifdef WITH_SELINUX
+	MONITOR_REQ_AUTHROLE,
+#endif
 	MONITOR_REQ_SIGN, MONITOR_ANS_SIGN,
 	MONITOR_REQ_PWNAM, MONITOR_ANS_PWNAM,
 	MONITOR_REQ_AUTH2_READ_BANNER, MONITOR_ANS_AUTH2_READ_BANNER,
diff -up openssh-5.9p0/monitor_wrap.c.role openssh-5.9p0/monitor_wrap.c
--- openssh-5.9p0/monitor_wrap.c.role	2011-08-31 11:42:53.548024503 +0200
+++ openssh-5.9p0/monitor_wrap.c	2011-08-31 11:42:56.029024553 +0200
@@ -336,6 +336,25 @@ mm_inform_authserv(char *service, char *
 	buffer_free(&m);
 }
 
+/* Inform the privileged process about role */
+
+#ifdef WITH_SELINUX
+void
+mm_inform_authrole(char *role)
+{
+	Buffer m;
+
+	debug3("%s entering", __func__);
+
+	buffer_init(&m);
+	buffer_put_cstring(&m, role ? role : "");
+
+	mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHROLE, &m);
+
+	buffer_free(&m);
+}
+#endif
+
 /* Do the password authentication */
 int
 mm_auth_password(Authctxt *authctxt, char *password)
diff -up openssh-5.9p0/monitor_wrap.h.role openssh-5.9p0/monitor_wrap.h
--- openssh-5.9p0/monitor_wrap.h.role	2011-08-31 11:42:53.660025271 +0200
+++ openssh-5.9p0/monitor_wrap.h	2011-08-31 11:42:56.131025748 +0200
@@ -42,6 +42,9 @@ int mm_is_monitor(void);
 DH *mm_choose_dh(int, int, int);
 int mm_key_sign(Key *, u_char **, u_int *, u_char *, u_int);
 void mm_inform_authserv(char *, char *);
+#ifdef WITH_SELINUX
+void mm_inform_authrole(char *);
+#endif
 struct passwd *mm_getpwnamallow(const char *);
 char *mm_auth2_read_banner(void);
 int mm_auth_password(struct Authctxt *, char *);
diff -up openssh-5.9p0/openbsd-compat/Makefile.in.role openssh-5.9p0/openbsd-compat/Makefile.in
--- openssh-5.9p0/openbsd-compat/Makefile.in.role	2010-10-07 13:19:24.000000000 +0200
+++ openssh-5.9p0/openbsd-compat/Makefile.in	2011-08-31 11:48:02.404091479 +0200
@@ -20,7 +20,7 @@ OPENBSD=base64.o basename.o bindresvport
 
 COMPAT=bsd-arc4random.o bsd-asprintf.o bsd-closefrom.o bsd-cray.o bsd-cygwin_util.o bsd-getpeereid.o bsd-misc.o bsd-nextstep.o bsd-openpty.o bsd-poll.o bsd-snprintf.o bsd-statvfs.o bsd-waitpid.o fake-rfc2553.o openssl-compat.o xmmap.o xcrypt.o
 
-PORTS=port-aix.o port-irix.o port-linux.o port-solaris.o port-tun.o port-uw.o
+PORTS=port-aix.o port-irix.o port-linux.o port-linux_part_2.o port-solaris.o port-tun.o port-uw.o
 
 .c.o:
 	$(CC) $(CFLAGS) $(CPPFLAGS) -c $<
diff -up openssh-5.9p0/openbsd-compat/port-linux.c.role openssh-5.9p0/openbsd-compat/port-linux.c
--- openssh-5.9p0/openbsd-compat/port-linux.c.role	2011-08-29 08:09:57.000000000 +0200
+++ openssh-5.9p0/openbsd-compat/port-linux.c	2011-08-31 11:42:56.492087969 +0200
@@ -31,7 +31,11 @@
 
 #include "log.h"
 #include "xmalloc.h"
+#include "servconf.h"
 #include "port-linux.h"
+#include "key.h"
+#include "hostfile.h"
+#include "auth.h"
 
 #ifdef WITH_SELINUX
 #include <selinux/selinux.h>
@@ -42,41 +46,63 @@
 # define SSH_SELINUX_UNCONFINED_TYPE ":unconfined_t:"
 #endif
 
-/* Wrapper around is_selinux_enabled() to log its return value once only */
-int
-ssh_selinux_enabled(void)
-{
-	static int enabled = -1;
+extern ServerOptions options;
+extern Authctxt *the_authctxt;
+extern int inetd_flag;
+extern int rexeced_flag;
 
-	if (enabled == -1) {
-		enabled = (is_selinux_enabled() == 1);
-		debug("SELinux support %s", enabled ? "enabled" : "disabled");
+static void
+ssh_selinux_get_role_level(char **role, const char **level)
+{
+	*role = NULL;
+	*level = NULL;
+	if (the_authctxt) {
+		if (the_authctxt->role != NULL) {
+			char *slash;
+			*role = xstrdup(the_authctxt->role);
+			if ((slash = strchr(*role, '/')) != NULL) {
+				*slash = '\0';
+				*level = slash + 1;
+			}
+		}
 	}
-
-	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;
-	int r;
+	security_context_t sc = NULL;
+	char *sename, *lvl;
+	char *role;
+	const char *reqlvl;
+	int r = 0;
+ 
+	ssh_selinux_get_role_level(&role, &reqlvl);
 
 #ifdef HAVE_GETSEUSERBYNAME
-	if (getseuserbyname(pwname, &sename, &lvl) != 0)
-		return NULL;
+	if ((r=getseuserbyname(pwname, &sename, &lvl)) != 0) {
+		sename = NULL;
+		lvl = NULL;
+	}
 #else
 	sename = pwname;
 	lvl = NULL;
 #endif
 
+	if (r == 0) {
 #ifdef HAVE_GET_DEFAULT_CONTEXT_WITH_LEVEL
-	r = get_default_context_with_level(sename, lvl, NULL, &sc);
+		if (role != NULL && role[0])
+			r = get_default_context_with_rolelevel(sename, role, lvl, NULL, &sc);
+		else
+			r = get_default_context_with_level(sename, lvl, NULL, &sc);
 #else
-	r = get_default_context(sename, NULL, &sc);
+		if (role != NULL && role[0])
+			r = get_default_context_with_role(sename, role, NULL, &sc);
+		else
+			r = get_default_context(sename, NULL, &sc);
 #endif
+	}
 
 	if (r != 0) {
 		switch (security_getenforce()) {
@@ -104,6 +130,36 @@ ssh_selinux_getctxbyname(char *pwname)
 	return (sc);
 }
 
+/* Setup environment variables for pam_selinux */
+static int
+ssh_selinux_setup_pam_variables(void)
+{
+	const char *reqlvl;
+	char *role;
+	char *use_current;
+	int rv;
+
+	debug3("%s: setting execution context", __func__);
+
+	ssh_selinux_get_role_level(&role, &reqlvl);
+
+	rv = do_pam_putenv("SELINUX_ROLE_REQUESTED", role ? role : "");
+	
+	if (inetd_flag && !rexeced_flag) {
+		use_current = "1";
+	} else {
+		use_current = "";
+		rv = rv || do_pam_putenv("SELINUX_LEVEL_REQUESTED", reqlvl ? reqlvl: "");
+	}
+
+	rv = rv || do_pam_putenv("SELINUX_USE_CURRENT_RANGE", use_current);
+
+	if (role != NULL)
+		xfree(role);
+	
+	return rv;
+}
+
 /* Set the execution context to the default for the specified user */
 void
 ssh_selinux_setup_exec_context(char *pwname)
@@ -113,6 +169,24 @@ ssh_selinux_setup_exec_context(char *pwn
 	if (!ssh_selinux_enabled())
 		return;
 
+	if (options.use_pam) {
+		/* do not compute context, just setup environment for pam_selinux */
+		if (ssh_selinux_setup_pam_variables()) {
+			switch (security_getenforce()) {
+			case -1:
+				fatal("%s: security_getenforce() failed", __func__);
+			case 0:
+				error("%s: SELinux PAM variable setup failure. Continuing in permissive mode.",
+				    __func__);
+			break;
+			default:
+				fatal("%s: SELinux PAM variable setup failure. Aborting connection.",
+				    __func__);
+			}
+		}
+		return;
+	}
+
 	debug3("%s: setting execution context", __func__);
 
 	user_ctx = ssh_selinux_getctxbyname(pwname);
@@ -220,21 +294,6 @@ ssh_selinux_change_context(const char *n
 	xfree(newctx);
 }
 
-void
-ssh_selinux_setfscreatecon(const char *path)
-{
-	security_context_t context;
-
-	if (!ssh_selinux_enabled())
-		return;
-	if (path == NULL) {
-		setfscreatecon(NULL);
-		return;
-	}
-	if (matchpathcon(path, 0700, &context) == 0)
-		setfscreatecon(context);
-}
-
 #endif /* WITH_SELINUX */
 
 #ifdef LINUX_OOM_ADJUST
diff -up openssh-5.9p0/openbsd-compat/port-linux_part_2.c.role openssh-5.9p0/openbsd-compat/port-linux_part_2.c
--- openssh-5.9p0/openbsd-compat/port-linux_part_2.c.role	2011-08-31 11:42:56.583047619 +0200
+++ openssh-5.9p0/openbsd-compat/port-linux_part_2.c	2011-08-31 11:42:56.586178005 +0200
@@ -0,0 +1,75 @@
+/* $Id: port-linux.c,v 1.11.4.2 2011/02/04 00:43:08 djm Exp $ */
+
+/*
+ * Copyright (c) 2005 Daniel Walsh <dwalsh@redhat.com>
+ * 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-specific portability code - just SELinux support at present
+ */
+
+#include "includes.h"
+
+#if defined(WITH_SELINUX) || defined(LINUX_OOM_ADJUST)
+#include <errno.h>
+#include <stdarg.h>
+#include <string.h>
+#include <stdio.h>
+
+#include "log.h"
+#include "xmalloc.h"
+#include "port-linux.h"
+#include "key.h"
+#include "hostfile.h"
+#include "auth.h"
+
+#ifdef WITH_SELINUX
+#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 */
+int
+ssh_selinux_enabled(void)
+{
+	static int enabled = -1;
+
+	if (enabled == -1) {
+		enabled = (is_selinux_enabled() == 1);
+		debug("SELinux support %s", enabled ? "enabled" : "disabled");
+	}
+
+	return (enabled);
+}
+
+void
+ssh_selinux_setfscreatecon(const char *path)
+{
+	security_context_t context;
+
+	if (!ssh_selinux_enabled())
+		return;
+	if (path == NULL) {
+		setfscreatecon(NULL);
+		return;
+	}
+	if (matchpathcon(path, 0700, &context) == 0)
+		setfscreatecon(context);
+}
+
+#endif /* WITH_SELINUX */
+
+#endif /* WITH_SELINUX || LINUX_OOM_ADJUST */