New hashing algorithms.

lib/HashAlgorithm/CryptExtendedDES.php

@@ -0,0 +1,63 @@
+<?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;
+
+use OCA\UserSQL\HashAlgorithm\Base\BaseCrypt;
+use OCA\UserSQL\HashAlgorithm\Base\Utils;
+
+/**
+ * Extended DES Crypt hashing implementation.
+ * @author Marcin Łojewski <dev@mlojewski.me>
+ */
+class CryptExtendedDES extends BaseCrypt
+{
+    use Utils;
+
+    /**
+     * @inheritdoc
+     */
+    public function getVisibleName()
+    {
+        return "Extended DES (Crypt)";
+    }
+
+    /**
+     * @inheritdoc
+     */
+    protected function getSalt()
+    {
+        // TODO - add support for options: iteration_count.
+        return self::base64IntEncode(1000) . self::randomString(4, self::SALT_ALPHABET);
+    }
+
+    private static function base64IntEncode($number)
+    {
+        $alphabet = str_split(self::SALT_ALPHABET);
+        $chars = array();
+        $base = sizeof($alphabet);
+        while ($number) {
+            $rem = $number % $base;
+            $number = (int)($number / $base);
+            $arr[] = $alphabet[$rem];
+        }
+        $string = implode($chars);
+        return str_pad($string, 4, '.', STR_PAD_RIGHT);
+    }
+}