'lib' rewritten.

lib/Crypto/CryptSHA256.php

@@ -0,0 +1,69 @@
+<?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;
+
+use OCP\IL10N;
+
+/**
+ * SHA256 Crypt hashing implementation.
+ *
+ * @see    crypt()
+ * @author Marcin Łojewski <dev@mlojewski.me>
+ */
+class CryptSHA256 extends AbstractCrypt
+{
+    /**
+     * @var int The number of rounds.
+     */
+    private $rounds;
+
+    /**
+     * The class constructor.
+     *
+     * @param IL10N $localization The localization service.
+     * @param   int $rounds       The number of rounds.
+     *                            This value must be between 1000 and 999999999.
+     */
+    public function __construct(IL10N $localization, $rounds = 5000)
+    {
+        parent::__construct($localization);
+        $this->rounds = $rounds;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    protected function getSalt()
+    {
+        return "$5\$rounds=" . $this->rounds . "$" . Utils::randomString(
+                16, self::SALT_ALPHABET
+            ) . "$";
+    }
+
+    /**
+     * @inheritdoc
+     */
+    protected function getAlgorithmName()
+    {
+        return "SHA256 (Crypt)";
+    }
+}