Enigma: Handle signed content inside of encrypted message

plugins/enigma/README

@@ -15,7 +15,6 @@ Plugin Status:
 TODO (must have):
 
 - Fix issues with enabled messages_cache
-- PGP: Handling of signed inside encrypted message
 - Make working with gnupg-2.x
 - Keys export to file
 - Disable Reply/Forward options when viewing encrypted messages

plugins/enigma/lib/enigma_engine.php

@@ -585,6 +585,11 @@ class enigma_engine
             $part->body_modified = true;
             $part->encrypted     = true;
 
+            // PGP signed inside? verify signature
+            if (preg_match('/^-----BEGIN PGP SIGNED MESSAGE-----/', $body)) {
+                $this->parse_plain_signed($p, $body);
+            }
+
             // Encrypted plain message may contain encrypted attachments
             // in such case attachments have .pgp extension and application/octet-stream.
             // This is what happens when you select "Encrypt each attachment separately