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at/at-3.1.14-selinux.patch

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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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