Enigma: Make recipient key searches case-insensitive (#5434)

CHANGELOG

@@ -3,6 +3,7 @@ CHANGELOG Roundcube Webmail
 
 - Enigma: Add possibility to configure gpg-agent binary location (enigma_pgp_agent)
 - Enigma: Fix signature verification with some IMAP servers, e.g. Gmail, DBMail (#5371)
+- Enigma: Make recipient key searches case-insensitive (#5434)
 - Fix regression in resizing JPEG images with Imagick (#5376)
 - Managesieve: Fix parsing of vacation date-time with non-default date_format (#5372)
 - Use SymLinksIfOwnerMatch in .htaccess instead of FollowSymLinks disabled on some hosts for security reasons (#5370)

plugins/enigma/lib/enigma_key.php

@@ -113,7 +113,7 @@ class enigma_key
         $now = time();
 
         foreach ($this->users as $user) {
-            if ($user->email === $email && $user->valid && !$user->revoked) {
+            if (strcasecmp($user->email, $email) === 0 && $user->valid && !$user->revoked) {
                 foreach ($this->subkeys as $subkey) {
                     if (!$subkey->revoked && (!$subkey->expires || $subkey->expires > $now)) {
                         if ($subkey->usage & $mode) {