--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/plugins/enigma/lib/enigma_key.php	Thu Jan 04 15:50:29 2018 -0500
@@ -0,0 +1,167 @@
+<?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();
+    public $reference;
+    public $password;
+
+    const TYPE_UNKNOWN = 0;
+    const TYPE_KEYPAIR = 1;
+    const TYPE_PUBLIC  = 2;
+
+    const CAN_ENCRYPT      = 1;
+    const CAN_SIGN         = 2;
+    const CAN_CERTIFY      = 4;
+    const CAN_AUTHENTICATE = 8;
+
+
+    /**
+     * Keys list sorting callback for usort()
+     */
+    static function cmp($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;
+    }
+
+    /**
+     * Returns true if any of subkeys is a private key
+     */
+    function is_private()
+    {
+        $now = time();
+
+        foreach ($this->subkeys as $subkey)
+            if ($subkey->has_private)
+                return true;
+
+        return false;
+    }
+
+    /**
+     * Get key ID by user email
+     */
+    function find_subkey($email, $mode)
+    {
+        $now = time();
+
+        foreach ($this->users as $user) {
+            if (strcasecmp($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) {
+                            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;
+    }
+}