Enigma: Fix handling of messages with nested PGP encrypted parts (#5634)

CHANGELOG

@@ -3,6 +3,7 @@ CHANGELOG Roundcube Webmail
 
 - Managesieve: Fix handling of scripts with nested rules (#5540)
 - Fix variable substitution in ldap host for some use-cases, e.g. new_user_identity (#5544)
+- Enigma: Fix handling of messages with nested PGP encrypted parts (#5634)
 - Enigma: Fix PHP fatal error when decrypting a message with invalid signature (#5555)
 - Enigma: Fix missing require statement for Crypt_GPG_KeyGenerator (#5641)
 - Fix adding images to new identity signatures

plugins/enigma/lib/enigma_engine.php

@@ -404,11 +404,6 @@ class enigma_engine
     {
         $part = $p['structure'];
 
-        // exit, if we're already inside a decrypted message
-        if (in_array($part->mime_id, $this->encrypted_parts)) {
-            return;
-        }
-
         // Get message body from IMAP server
         if ($body === null) {
             $body = $this->get_part_body($p['object'], $part);