WoltLab Community Framework 2.x hash implementation

lib/Crypto/WCF2.php

@@ -0,0 +1,63 @@
+<?php
+/**
+ * Nextcloud - user_sql
+ *
+ * @copyright 2018 Marcin Łojewski <dev@mlojewski.me>
+ * @author    Marcin Łojewski <dev@mlojewski.me>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace OCA\UserSQL\Crypto;
+
+/**
+ * WCF2 hashing implementation.
+ *
+ * @author Marcin Łojewski <dev@mlojewski.me>
+ */
+class WCF2 extends AbstractCrypt
+{
+    /**
+     * @inheritdoc
+     */
+    public function checkPassword($password, $dbHash)
+    {
+        return hash_equals($dbHash, crypt(crypt($password, $dbHash), $dbHash));
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getPasswordHash($password)
+    {
+        $salt = $this->getSalt();
+        return crypt(crypt($password, $salt), $salt);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    protected function getSalt()
+    {
+        return "$2a$08$" . Utils::randomString(22, self::SALT_ALPHABET) . "$";
+    }
+
+    /**
+     * @inheritdoc
+     */
+    protected function getAlgorithmName()
+    {
+        return "WoltLab Community Framework 2.x";
+    }
+}