#include "smack-util.h"
#ifdef HAVE_SELINUX
+DEFINE_TRIVIAL_CLEANUP_FUNC(security_context_t, freecon);
+DEFINE_TRIVIAL_CLEANUP_FUNC(context_t, context_free);
+
+#define _cleanup_security_context_free_ _cleanup_(freeconp)
+#define _cleanup_context_free_ _cleanup_(context_freep)
+
static struct selabel_handle *label_hnd = NULL;
#endif
return r;
}
-int label_get_child_label(int socket_fd, const char *exe, char **label) {
- int r = 0;
+int label_get_our_label(char **label) {
+ int r = -EOPNOTSUPP;
#ifdef HAVE_SELINUX
+ char *l = NULL;
+
+ r = getcon(&l);
+ if (r < 0)
+ return r;
+
+ *label = l;
+#endif
+
+ return r;
+}
+
+int label_get_child_mls_label(int socket_fd, const char *exe, char **label) {
+ int r = -EOPNOTSUPP;
- security_context_t mycon = NULL, peercon = NULL, fcon = NULL, ret = NULL;
+#ifdef HAVE_SELINUX
+
+ _cleanup_security_context_free_ security_context_t mycon = NULL, peercon = NULL, fcon = NULL, ret = NULL;
+ _cleanup_context_free_ context_t pcon = NULL, bcon = NULL;
security_class_t sclass;
- context_t pcon = NULL, bcon = NULL;
+
const char *range = NULL;
assert(socket_fd >= 0);
assert(label);
r = getcon(&mycon);
- if (r < 0)
+ if (r < 0) {
+ r = -EINVAL;
goto out;
+ }
r = getpeercon(socket_fd, &peercon);
- if (r < 0)
+ if (r < 0) {
+ r = -EINVAL;
goto out;
+ }
- r = getfilecon(exe, &fcon);
- if (r < 0)
+ r = getexeccon(&fcon);
+ if (r < 0) {
+ r = -EINVAL;
goto out;
+ }
+
+ if (!fcon) {
+ /* If there is no context set for next exec let's use context
+ of target executable */
+ r = getfilecon(exe, &fcon);
+ if (r < 0) {
+ r = -errno;
+ goto out;
+ }
+ }
bcon = context_new(mycon);
- if (!bcon)
+ if (!bcon) {
+ r = -ENOMEM;
goto out;
+ }
pcon = context_new(peercon);
- if (!pcon)
+ if (!pcon) {
+ r = -ENOMEM;
goto out;
+ }
range = context_range_get(pcon);
- if (!range)
+ if (!range) {
+ r = -errno;
goto out;
+ }
r = context_range_set(bcon, range);
- if (r)
+ if (r) {
+ r = -errno;
goto out;
+ }
freecon(mycon);
- mycon = context_str(bcon);
- if (!mycon)
+ mycon = strdup(context_str(bcon));
+ if (!mycon) {
+ r = -errno;
goto out;
+ }
sclass = string_to_security_class("process");
r = security_compute_create(mycon, fcon, sclass, &ret);
- if (r < 0)
+ if (r < 0) {
+ r = -EINVAL;
goto out;
+ }
*label = ret;
+ ret = NULL;
+ r = 0;
out:
- if (r && security_getenforce() == 1)
- r = -errno;
-
- freecon(mycon);
- freecon(peercon);
- freecon(fcon);
- context_free(pcon);
- context_free(bcon);
-
+ if (r < 0 && security_getenforce() == 1)
+ return r;
#endif
return r;
}