New hashing algorithms.

lib/HashAlgorithm/Base/BaseCrypt.php

@@ -0,0 +1,60 @@
+<?php
+/**
+ * Nextcloud - user_sql
+ * Copyright (C) 2018 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\HashAlgorithm\Base;
+
+/**
+ * Implements standard Unix DES-based algorithm or
+ * alternative algorithms that may be available on the system.
+ * @see crypt()
+ * @author Marcin Łojewski <dev@mlojewski.me>
+ */
+abstract class BaseCrypt implements HashAlgorithm
+{
+    use Singleton;
+
+    const SALT_ALPHABET = "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
+
+    /**
+     * @inheritdoc
+     */
+    abstract public function getVisibleName();
+
+    /**
+     * @inheritdoc
+     */
+    public function checkPassword($password, $dbHash)
+    {
+        return hash_equals($dbHash, crypt($password, $dbHash));
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getPasswordHash($password)
+    {
+        return crypt($password, self::getSalt());
+    }
+
+    /**
+     * Generate salt for hashing algorithm.
+     * @return string
+     */
+    protected abstract function getSalt();
+}