File at-3.1.14-selinux.patch of Package at.3194

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File at-3.1.14-selinux.patch of Package at.3194

Index: atd.c
===================================================================
--- atd.c.orig
+++ atd.c
@@ -81,10 +81,18 @@
 
 #ifndef HAVE_GETLOADAVG
 #include "getloadavg.h"
 #endif
 
+#ifdef WITH_SELINUX
+#include <selinux/selinux.h>
+#include <selinux/get_context_list.h>
+int selinux_enabled=0;
+#include <selinux/flask.h>
+#include <selinux/av_permissions.h>
+#endif
+
 /* Macros */
 
 #define BATCH_INTERVAL_DEFAULT 60
 #define CHECK_INTERVAL 3600
 
@@ -193,10 +201,72 @@ myfork()
 }
 
 #define fork myfork
 #endif
 
+#ifdef WITH_SELINUX
+static int set_selinux_context(const char *name, const char *filename) {
+       security_context_t user_context=NULL;
+       security_context_t  file_context=NULL;
+       struct av_decision avd;
+       int retval=-1;
+       char *seuser=NULL;
+       char *level=NULL;
+
+       if (getseuserbyname(name, &seuser, &level) == 0) {
+               retval=get_default_context_with_level(seuser, level, NULL, &user_context);
+               free(seuser);
+               free(level);
+               if (retval) {
+                       if (security_getenforce()==1) {
+                               perr("execle: couldn't get security context for user %s\n", name);
+                       } else {
+                               syslog(LOG_ERR, "execle: couldn't get security context for user %s\n", name);
+                               return -1;
+                       }
+               }
+       }
+
+       /*
+       * Since crontab files are not directly executed,
+       * crond must ensure that the crontab file has
+       * a context that is appropriate for the context of
+       * the user cron job.  It performs an entrypoint
+       * permission check for this purpose.
+       */
+       if (fgetfilecon(STDIN_FILENO, &file_context) < 0)
+               perr("fgetfilecon FAILED %s", filename);
+
+       retval = security_compute_av(user_context,
+                                    file_context,
+                                    SECCLASS_FILE,
+                                    FILE__ENTRYPOINT,
+                                    &avd);
+       freecon(file_context);
+       if (retval || ((FILE__ENTRYPOINT & avd.allowed) != FILE__ENTRYPOINT)) {
+               if (security_getenforce()==1) {
+                       perr("Not allowed to set exec context to %s for user  %s\n", user_context,name);
+               } else {
+                       syslog(LOG_ERR, "Not allowed to set exec context to %s for user  %s\n", user_context,name);
+                       retval = -1;
+                       goto err;
+               }
+       }
+       if (setexeccon(user_context) < 0) {
+               if (security_getenforce()==1) {
+                       perr("Could not set exec context to %s for user  %s\n", user_context,name);
+                       retval = -1;
+               } else {
+                       syslog(LOG_ERR, "Could not set exec context to %s for user  %s\n", user_context,name);
+               }
+       }
+  err:
+       freecon(user_context);
+       return 0;
+}
+#endif
+
 static void
 run_file(const char *filename, uid_t uid, gid_t gid)
 {
 /* Run a file by by spawning off a process which redirects I/O,
  * spawns a subshell, then waits for it to complete and sends
@@ -440,13 +510,25 @@ run_file(const char *filename, uid_t uid
 
 	    if (SIG_ERR == signal(SIGCHLD, SIG_DFL))
 		perr("Cannot reset signal handler to default");
 
 	    chdir("/");
-
+#ifdef WITH_SELINUX
+            if (selinux_enabled > 0) {
+                if (set_selinux_context(pentry->pw_name, filename) < 0)
+                       perr("SELinux Failed to set context\n");
+            }
+#endif
 	    if (execle("/bin/sh", "sh", (char *) NULL, nenvp) != 0)
 		perr("Exec failed for /bin/sh");
+#ifdef WITH_SELINUX
+               if (selinux_enabled>0)
+                       if (setexeccon(NULL) < 0)
+                               if (security_getenforce()==1)
+                                       perr("Could not resset exec context for user %s\n", pentry->pw_name);
+#endif
+//end
 
 	PRIV_END
     }
     /* We're the parent.  Let's wait.
      */
@@ -715,10 +797,14 @@ main(int argc, char *argv[])
     time_t next_invocation;
     struct sigaction act;
     struct passwd *pwe;
     struct group *ge;
 
+#ifdef WITH_SELINUX
+    selinux_enabled=is_selinux_enabled();
+#endif
+
 /* We don't need root privileges all the time; running under uid and gid
  * daemon is fine.
  */
 
     if ((pwe = getpwnam(DAEMON_USERNAME)) == NULL)
Index: config.h.in
===================================================================
--- config.h.in.orig
+++ config.h.in
@@ -69,10 +69,13 @@
 #undef HAVE_NLIST_H
 
 /* Define to 1 for PAM support */
 #undef HAVE_PAM
 
+/* Define if you are building with_selinux  */
+#undef WITH_SELINUX
+
 /* Define to 1 if you have the `pstat_getdynamic' function. */
 #undef HAVE_PSTAT_GETDYNAMIC
 
 /* Define to 1 if you have the <security/pam_appl.h> header file. */
 #undef HAVE_SECURITY_PAM_APPL_H
Index: configure.ac
===================================================================
--- configure.ac.orig
+++ configure.ac
@@ -258,7 +258,15 @@ AC_ARG_WITH(daemon_groupname,
     DAEMON_GROUPNAME=daemon
     AC_MSG_RESULT(daemon)
 )
 AC_SUBST(DAEMON_GROUPNAME)
 
+AC_ARG_WITH(selinux,
+[ --with-selinux       Define to run with selinux],
+AC_DEFINE(WITH_SELINUX),
+)
+AC_CHECK_LIB(selinux, is_selinux_enabled, SELINUXLIB=-lselinux)
+AC_SUBST(SELINUXLIB)
+AC_SUBST(WITH_SELINUX)
+
 AC_CONFIG_FILES(Makefile atrun atd.8 atrun.8 at.1 at.allow.5 batch)
 AC_OUTPUT
Index: Makefile.in
===================================================================
--- Makefile.in.orig
+++ Makefile.in
@@ -38,10 +38,12 @@ DEFS 		= @DEFS@ -DVERSION=\"$(VERSION)\"
 		-DLFILE=\"$(LFILE)\" -Wall
 LIBS		= @LIBS@
 LIBOBJS		= @LIBOBJS@
 INSTALL		= @INSTALL@
 PAMLIB          = @PAMLIB@
+SELINUXLIB      = @SELINUXLIB@
+
 
 CLONES		= atq atrm
 ATOBJECTS	= at.o panic.o perm.o posixtm.o y.tab.o lex.yy.o
 RUNOBJECTS	= atd.o daemon.o $(LIBOBJS)
 CSRCS		= at.c atd.c panic.c perm.c posixtm.c daemon.c getloadavg.c \
@@ -71,11 +72,11 @@ at: $(ATOBJECTS)
 	rm -f $(CLONES)
 	$(LN_S) -f at atq
 	$(LN_S) -f at atrm
 
 atd: $(RUNOBJECTS)
-	$(CC) $(LDFLAGS) -o atd $(RUNOBJECTS) $(LIBS) $(PAMLIB)
+	$(CC) $(LDFLAGS) -o atd $(RUNOBJECTS) $(LIBS) $(PAMLIB) $(SELINUXLIB)
 
 y.tab.c y.tab.h: parsetime.y
 	$(YACC) -d parsetime.y
 
 lex.yy.c: parsetime.l

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File at-3.1.14-selinux.patch of Package at.3194

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