+ /* Check to see if this is an X509 based signature */
+ if (sig->data[2] == 0 || sig->data[2] == 100) {
+ size_t len;
+
+ keyid = 0;
+ len = parse_subpackets(&sig->data[4], &keyid, NULL);
+ if (keyid == 0 &&
+ /* No unhashed data */
+ sig->data[4 + len] == 0 &&
+ sig->data[5 + len] == 0 &&
+ /* Dummy 0 checksum */
+ sig->data[6 + len] == 0 &&
+ sig->data[7 + len] == 0 &&
+ /* Dummy MPI of 1 */
+ sig->data[8 + len] == 0 &&
+ sig->data[9 + len] == 1 &&
+ sig->data[10 + len] == 1) {
+ get_keyid(key, &keyid);
+ logthing(LOGTHING_DEBUG,
+ "Skipping X509 signature on 0x%016"
+ PRIX64,
+ keyid);
+ return -1;
+ }
+ }
+