common: Don't assume on-disk layout matches in-memory layout.
[gnupg.git] / g10 / parse-packet.c
index 1467dc3..bc99653 100644 (file)
@@ -1711,25 +1711,31 @@ parse_sig_subpkt2 (PKT_signature * sig, sigsubpkttype_t reqtype)
 void
 parse_revkeys (PKT_signature * sig)
 {
-  struct revocation_key *revkey;
+  const byte *revkey;
   int seq = 0;
   size_t len;
 
   if (sig->sig_class != 0x1F)
     return;
 
-  while ((revkey =
-         (struct revocation_key *) enum_sig_subpkt (sig->hashed,
-                                                    SIGSUBPKT_REV_KEY,
-                                                    &len, &seq, NULL)))
+  while ((revkey = enum_sig_subpkt (sig->hashed, SIGSUBPKT_REV_KEY,
+                                   &len, &seq, NULL)))
     {
-      if (len == sizeof (struct revocation_key)
-          && (revkey->class & 0x80))  /* 0x80 bit must be set.  */
+      if (/* The only valid length is 22 bytes.  See RFC 4880
+            5.2.3.15.  */
+         len == 22
+         /* 0x80 bit must be set on the class.  */
+          && (revkey[0] & 0x80))
        {
          sig->revkey = xrealloc (sig->revkey,
-                                 sizeof (struct revocation_key *) *
+                                 sizeof (struct revocation_key) *
                                  (sig->numrevkeys + 1));
-         sig->revkey[sig->numrevkeys] = revkey;
+
+         /* Copy the individual fields.  */
+         sig->revkey[sig->numrevkeys].class = revkey[0];
+         sig->revkey[sig->numrevkeys].algid = revkey[1];
+         memcpy (sig->revkey[sig->numrevkeys].fpr, &revkey[2], 20);
+
          sig->numrevkeys++;
        }
     }