#include <unistd.h>
#include <malloc.h>
#include <sys/un.h>
+
#ifdef HAVE_SELINUX
#include <selinux/selinux.h>
#include <selinux/label.h>
#define _cleanup_security_context_free_ _cleanup_(freeconp)
#define _cleanup_context_free_ _cleanup_(context_freep)
-static int use_selinux_cached = -1;
+static int cached_use = -1;
static struct selabel_handle *label_hnd = NULL;
+
+#define log_enforcing(...) log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG, __VA_ARGS__)
#endif
-bool use_selinux(void) {
+bool mac_selinux_use(void) {
#ifdef HAVE_SELINUX
- if (use_selinux_cached < 0)
- use_selinux_cached = is_selinux_enabled() > 0;
+ if (cached_use < 0)
+ cached_use = is_selinux_enabled() > 0;
- return use_selinux_cached;
+ return cached_use;
#else
return false;
#endif
}
-void retest_selinux(void) {
+void mac_selinux_retest(void) {
#ifdef HAVE_SELINUX
- use_selinux_cached = -1;
+ cached_use = -1;
#endif
}
usec_t before_timestamp, after_timestamp;
struct mallinfo before_mallinfo, after_mallinfo;
- if (!use_selinux())
+ if (!mac_selinux_use())
return 0;
if (label_hnd)
label_hnd = selabel_open(SELABEL_CTX_FILE, NULL, 0);
if (!label_hnd) {
- log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
- "Failed to initialize SELinux context: %m");
+ log_enforcing("Failed to initialize SELinux context: %m");
r = security_getenforce() == 1 ? -errno : 0;
} else {
char timespan[FORMAT_TIMESPAN_MAX];
return r;
}
+void mac_selinux_finish(void) {
+
+#ifdef HAVE_SELINUX
+ if (!label_hnd)
+ return;
+
+ selabel_close(label_hnd);
+#endif
+}
+
int mac_selinux_fix(const char *path, bool ignore_enoent, bool ignore_erofs) {
- int r = 0;
#ifdef HAVE_SELINUX
struct stat st;
- security_context_t fcon;
+ int r;
+
+ assert(path);
+ /* if mac_selinux_init() wasn't called before we are a NOOP */
if (!label_hnd)
return 0;
r = lstat(path, &st);
- if (r == 0) {
+ if (r >= 0) {
+ _cleanup_security_context_free_ security_context_t fcon = NULL;
+
r = selabel_lookup_raw(label_hnd, &fcon, path, st.st_mode);
/* If there's no label to set, then exit without warning */
if (r < 0 && errno == ENOENT)
return 0;
- if (r == 0) {
+ if (r >= 0) {
r = lsetfilecon(path, fcon);
- freecon(fcon);
/* If the FS doesn't support labels, then exit without warning */
if (r < 0 && errno == ENOTSUP)
if (ignore_erofs && errno == EROFS)
return 0;
- log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
- "Unable to fix label of %s: %m", path);
- r = security_getenforce() == 1 ? -errno : 0;
+ log_enforcing("Unable to fix SELinux security context of %s: %m", path);
+ if (security_getenforce() == 1)
+ return -errno;
}
#endif
- return r;
+ return 0;
}
-void mac_selinux_finish(void) {
+int mac_selinux_apply(const char *path, const char *label) {
#ifdef HAVE_SELINUX
- if (!use_selinux())
- return;
+ assert(path);
+ assert(label);
- if (label_hnd)
- selabel_close(label_hnd);
+ if (!mac_selinux_use())
+ return 0;
+
+ if (setfilecon(path, (security_context_t) label) < 0) {
+ log_enforcing("Failed to set SELinux security context %s on path %s: %m", label, path);
+ if (security_getenforce() == 1)
+ return -errno;
+ }
#endif
+ return 0;
}
int mac_selinux_get_create_label_from_exe(const char *exe, char **label) {
-
- int r = 0;
+ int r = -EOPNOTSUPP;
#ifdef HAVE_SELINUX
- security_context_t mycon = NULL, fcon = NULL;
+ _cleanup_security_context_free_ security_context_t mycon = NULL, fcon = NULL;
security_class_t sclass;
- if (!use_selinux()) {
- *label = NULL;
- return 0;
- }
+ assert(exe);
+ assert(label);
+
+ if (!mac_selinux_use())
+ return -EOPNOTSUPP;
r = getcon(&mycon);
if (r < 0)
- goto fail;
+ return -errno;
r = getfilecon(exe, &fcon);
if (r < 0)
- goto fail;
+ return -errno;
sclass = string_to_security_class("process");
r = security_compute_create(mycon, fcon, sclass, (security_context_t *) label);
- if (r == 0)
- log_debug("SELinux Socket context for %s will be set to %s", exe, *label);
-
-fail:
- if (r < 0 && security_getenforce() == 1)
- r = -errno;
-
- freecon(mycon);
- freecon(fcon);
+ if (r < 0)
+ return -errno;
#endif
return r;
int mac_selinux_get_our_label(char **label) {
int r = -EOPNOTSUPP;
+ assert(label);
+
#ifdef HAVE_SELINUX
- char *l = NULL;
+ if (!mac_selinux_use())
+ return -EOPNOTSUPP;
- r = getcon(&l);
+ r = getcon(label);
if (r < 0)
- return r;
-
- *label = l;
+ return -errno;
#endif
return r;
int r = -EOPNOTSUPP;
#ifdef HAVE_SELINUX
-
- _cleanup_security_context_free_ security_context_t mycon = NULL, peercon = NULL, fcon = NULL, ret = NULL;
+ _cleanup_security_context_free_ security_context_t mycon = NULL, peercon = NULL, fcon = NULL;
_cleanup_context_free_ context_t pcon = NULL, bcon = NULL;
security_class_t sclass;
-
const char *range = NULL;
assert(socket_fd >= 0);
assert(exe);
assert(label);
+ if (!mac_selinux_use())
+ return -EOPNOTSUPP;
+
r = getcon(&mycon);
- if (r < 0) {
- r = -EINVAL;
- goto out;
- }
+ if (r < 0)
+ return -errno;
r = getpeercon(socket_fd, &peercon);
- if (r < 0) {
- r = -EINVAL;
- goto out;
- }
+ if (r < 0)
+ return -errno;
r = getexeccon(&fcon);
- if (r < 0) {
- r = -EINVAL;
- goto out;
- }
+ if (r < 0)
+ return -errno;
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;
- }
+ if (r < 0)
+ return -errno;
}
bcon = context_new(mycon);
- if (!bcon) {
- r = -ENOMEM;
- goto out;
- }
+ if (!bcon)
+ return -ENOMEM;
pcon = context_new(peercon);
- if (!pcon) {
- r = -ENOMEM;
- goto out;
- }
+ if (!pcon)
+ return -ENOMEM;
range = context_range_get(pcon);
- if (!range) {
- r = -errno;
- goto out;
- }
+ if (!range)
+ return -errno;
r = context_range_set(bcon, range);
- if (r) {
- r = -errno;
- goto out;
- }
+ if (r)
+ return -errno;
freecon(mycon);
mycon = strdup(context_str(bcon));
- if (!mycon) {
- r = -errno;
- goto out;
- }
+ if (!mycon)
+ return -ENOMEM;
sclass = string_to_security_class("process");
- r = security_compute_create(mycon, fcon, sclass, &ret);
- if (r < 0) {
- r = -EINVAL;
- goto out;
- }
+ r = security_compute_create(mycon, fcon, sclass, (security_context_t *) label);
+ if (r < 0)
+ return -errno;
+#endif
+
+ return r;
+}
+
+void mac_selinux_free(char *label) {
- *label = ret;
- ret = NULL;
- r = 0;
+#ifdef HAVE_SELINUX
+ if (!mac_selinux_use())
+ return;
-out:
- if (r < 0 && security_getenforce() == 1)
- return r;
+ freecon((security_context_t) label);
#endif
- return r;
}
-int mac_selinux_context_set(const char *path, mode_t mode) {
+int mac_selinux_create_file_prepare(const char *path, mode_t mode) {
int r = 0;
#ifdef HAVE_SELINUX
- security_context_t filecon = NULL;
+ _cleanup_security_context_free_ security_context_t filecon = NULL;
+
+ assert(path);
+
+ if (!label_hnd)
+ return 0;
+
+ if (path_is_absolute(path))
+ r = selabel_lookup_raw(label_hnd, &filecon, path, mode);
+ else {
+ _cleanup_free_ char *newpath;
+
+ newpath = path_make_absolute_cwd(path);
+ if (!newpath)
+ return -ENOMEM;
+
+ r = selabel_lookup_raw(label_hnd, &filecon, newpath, mode);
+ }
- if (!use_selinux() || !label_hnd)
+ /* No context specified by the policy? Proceed without setting it. */
+ if (r < 0 && errno == ENOENT)
return 0;
- r = selabel_lookup_raw(label_hnd, &filecon, path, mode);
- if (r < 0 && errno != ENOENT)
+ if (r < 0)
r = -errno;
- else if (r == 0) {
+ else {
r = setfscreatecon(filecon);
if (r < 0) {
- log_error("Failed to set SELinux file context on %s: %m", path);
+ log_enforcing("Failed to set SELinux security context %s for %s: %m", filecon, path);
r = -errno;
}
-
- freecon(filecon);
}
if (r < 0 && security_getenforce() == 0)
return r;
}
-int mac_selinux_socket_set(const char *label) {
-
-#ifdef HAVE_SELINUX
- if (!use_selinux())
- return 0;
-
- if (setsockcreatecon((security_context_t) label) < 0) {
- log_full(security_getenforce() == 1 ? LOG_ERR : LOG_DEBUG,
- "Failed to set SELinux context (%s) on socket: %m", label);
-
- if (security_getenforce() == 1)
- return -errno;
- }
-#endif
-
- return 0;
-}
-
-void mac_selinux_context_clear(void) {
+void mac_selinux_create_file_clear(void) {
#ifdef HAVE_SELINUX
PROTECT_ERRNO;
- if (!use_selinux())
+ if (!mac_selinux_use())
return;
setfscreatecon(NULL);
#endif
}
-void mac_selinux_socket_clear(void) {
-
-#ifdef HAVE_SELINUX
- PROTECT_ERRNO;
-
- if (!use_selinux())
- return;
-
- setsockcreatecon(NULL);
-#endif
-}
-
-void mac_selinux_free(const char *label) {
-
-#ifdef HAVE_SELINUX
- if (!use_selinux())
- return;
-
- freecon((security_context_t) label);
-#endif
-}
-
-int mac_selinux_mkdir(const char *path, mode_t mode) {
- int r = 0;
+int mac_selinux_create_socket_prepare(const char *label) {
#ifdef HAVE_SELINUX
- /* Creates a directory and labels it according to the SELinux policy */
- security_context_t fcon = NULL;
-
- if (!label_hnd)
+ if (!mac_selinux_use())
return 0;
- if (path_is_absolute(path))
- r = selabel_lookup_raw(label_hnd, &fcon, path, S_IFDIR);
- else {
- _cleanup_free_ char *newpath;
+ assert(label);
- newpath = path_make_absolute_cwd(path);
- if (!newpath)
- return -ENOMEM;
+ if (setsockcreatecon((security_context_t) label) < 0) {
+ log_enforcing("Failed to set SELinux security context %s for sockets: %m", label);
- r = selabel_lookup_raw(label_hnd, &fcon, newpath, S_IFDIR);
+ if (security_getenforce() == 1)
+ return -errno;
}
+#endif
- if (r == 0)
- r = setfscreatecon(fcon);
+ return 0;
+}
- if (r < 0 && errno != ENOENT) {
- log_error("Failed to set security context %s for %s: %m", fcon, path);
+void mac_selinux_create_socket_clear(void) {
- if (security_getenforce() == 1) {
- r = -errno;
- goto finish;
- }
- }
+#ifdef HAVE_SELINUX
+ PROTECT_ERRNO;
- r = mkdir(path, mode);
- if (r < 0)
- r = -errno;
+ if (!mac_selinux_use())
+ return;
-finish:
- setfscreatecon(NULL);
- freecon(fcon);
+ setsockcreatecon(NULL);
#endif
-
- return r;
}
int mac_selinux_bind(int fd, const struct sockaddr *addr, socklen_t addrlen) {
/* Binds a socket and label its file system object according to the SELinux policy */
#ifdef HAVE_SELINUX
- security_context_t fcon = NULL;
+ _cleanup_security_context_free_ security_context_t fcon = NULL;
const struct sockaddr_un *un;
char *path;
int r;
assert(addr);
assert(addrlen >= sizeof(sa_family_t));
- if (!use_selinux() || !label_hnd)
+ if (!label_hnd)
goto skipped;
/* Filter out non-local sockets */
r = setfscreatecon(fcon);
if (r < 0 && errno != ENOENT) {
- log_error("Failed to set security context %s for %s: %m", fcon, path);
+ log_enforcing("Failed to set SELinux security context %s for %s: %m", fcon, path);
if (security_getenforce() == 1) {
r = -errno;
finish:
setfscreatecon(NULL);
- freecon(fcon);
-
return r;
skipped:
#endif
return bind(fd, addr, addrlen) < 0 ? -errno : 0;
}
-
-int mac_selinux_apply(const char *path, const char *label) {
- int r = 0;
-
-#ifdef HAVE_SELINUX
- if (!use_selinux())
- return 0;
-
- r = setfilecon(path, (char *)label);
-#endif
- return r;
-}
~ianmdlvl / elogind.git / blobdiff