예제 #1
0
const char *security_av_perm_to_string(security_class_t tclass,
				       access_vector_t av)
{
	struct discover_class_node *node;
	size_t i;

	av = unmap_perm(tclass, av);
	tclass = unmap_class(tclass);

	node = get_class_cache_entry_value(tclass);
	if (av && node)
		for (i = 0; i<MAXVECTORS; i++)
			if ((1<<i) & av)
				return node->perms[i];

	return NULL;
}
예제 #2
0
int security_compute_av_flags_raw(const char * scon,
				  const char * tcon,
				  security_class_t tclass,
				  access_vector_t requested,
				  struct av_decision *avd)
{
	char path[PATH_MAX];
	char *buf;
	size_t len;
	int fd, ret;

	if (!selinux_mnt) {
		errno = ENOENT;
		return -1;
	}

	snprintf(path, sizeof path, "%s/access", selinux_mnt);
	fd = open(path, O_RDWR | O_CLOEXEC);
	if (fd < 0)
		return -1;

	len = selinux_page_size;
	buf = malloc(len);
	if (!buf) {
		ret = -1;
		goto out;
	}

	snprintf(buf, len, "%s %s %hu %x", scon, tcon,
		 unmap_class(tclass), unmap_perm(tclass, requested));

	ret = write(fd, buf, strlen(buf));
	if (ret < 0)
		goto out2;

	memset(buf, 0, len);
	ret = read(fd, buf, len - 1);
	if (ret < 0)
		goto out2;

	ret = sscanf(buf, "%x %x %x %x %u %x",
		     &avd->allowed, &avd->decided,
		     &avd->auditallow, &avd->auditdeny,
		     &avd->seqno, &avd->flags);
	if (ret < 5) {
		ret = -1;
		goto out2;
	} else if (ret < 6)
		avd->flags = 0;

	/* If tclass invalid, kernel sets avd according to deny_unknown flag */
	if (tclass != 0)
		map_decision(tclass, avd);

	ret = 0;
      out2:
	free(buf);
      out:
	close(fd);
	return ret;
}