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diff --git a/plugins/enigma/lib/enigma_key.php b/plugins/enigma/lib/enigma_key.php
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+<?php
+/*
+ +-------------------------------------------------------------------------+
+ | Key class for the Enigma Plugin |
+ | |
+ | Copyright (C) 2010-2015 The Roundcube Dev Team |
+ | |
+ | Licensed under the GNU General Public License version 3 or |
+ | any later version with exceptions for skins & plugins. |
+ | See the README file for a full license statement. |
+ | |
+ +-------------------------------------------------------------------------+
+ | Author: Aleksander Machniak <alec@alec.pl> |
+ +-------------------------------------------------------------------------+
+*/
+
+class enigma_key
+{
+ public $id;
+ public $name;
+ public $users = array();
+ public $subkeys = array();
+
+ const TYPE_UNKNOWN = 0;
+ const TYPE_KEYPAIR = 1;
+ const TYPE_PUBLIC = 2;
+
+ const CAN_SIGN = 1;
+ const CAN_ENCRYPT = 2;
+
+ /**
+ * Keys list sorting callback for usort()
+ */
+ static function cmp($a, $b)
+ {
+ return strcmp($a->name, $b->name);
+ }
+
+ /**
+ * Returns key type
+ */
+ function get_type()
+ {
+ if ($this->subkeys[0]->has_private)
+ return enigma_key::TYPE_KEYPAIR;
+ else if (!empty($this->subkeys[0]))
+ return enigma_key::TYPE_PUBLIC;
+
+ return enigma_key::TYPE_UNKNOWN;
+ }
+
+ /**
+ * Returns true if all user IDs are revoked
+ */
+ function is_revoked()
+ {
+ foreach ($this->subkeys as $subkey)
+ if (!$subkey->revoked)
+ return false;
+
+ return true;
+ }
+
+ /**
+ * Returns true if any user ID is valid
+ */
+ function is_valid()
+ {
+ foreach ($this->users as $user)
+ if ($user->valid)
+ return true;
+
+ return false;
+ }
+
+ /**
+ * Returns true if any of subkeys is not expired
+ */
+ function is_expired()
+ {
+ $now = time();
+
+ foreach ($this->subkeys as $subkey)
+ if (!$subkey->expires || $subkey->expires > $now)
+ return true;
+
+ return false;
+ }
+
+ /**
+ * Get key ID by user email
+ */
+ function find_subkey($email, $mode)
+ {
+ $now = time();
+
+ foreach ($this->users as $user) {
+ if ($user->email === $email && $user->valid && !$user->revoked) {
+ foreach ($this->subkeys as $subkey) {
+ if (!$subkey->revoked && (!$subkey->expires || $subkey->expires > $now)) {
+ if (($mode == self::CAN_ENCRYPT && $subkey->can_encrypt)
+ || ($mode == self::CAN_SIGN && $subkey->has_private)
+ ) {
+ return $subkey;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ /**
+ * Converts long ID or Fingerprint to short ID
+ * Crypt_GPG uses internal, but e.g. Thunderbird's Enigmail displays short ID
+ *
+ * @param string Key ID or fingerprint
+ * @return string Key short ID
+ */
+ static function format_id($id)
+ {
+ // E.g. 04622F2089E037A5 => 89E037A5
+
+ return substr($id, -8);
+ }
+
+ /**
+ * Formats fingerprint string
+ *
+ * @param string Key fingerprint
+ *
+ * @return string Formatted fingerprint (with spaces)
+ */
+ static function format_fingerprint($fingerprint)
+ {
+ if (!$fingerprint) {
+ return '';
+ }
+
+ $result = '';
+ for ($i=0; $i<40; $i++) {
+ if ($i % 4 == 0) {
+ $result .= ' ';
+ }
+ $result .= $fingerprint[$i];
+ }
+
+ return $result;
+ }
+
+}