diff --git a/lib/HashAlgorithm/MD5.php b/lib/HashAlgorithm/MD5.php
new file mode 100644
index 0000000..5d7548d
--- /dev/null
+++ b/lib/HashAlgorithm/MD5.php
@@ -0,0 +1,75 @@
+<?php
+/**
+ * Nextcloud - user_sql
+ * Copyright (C) 2012-2018 Andreas Böhler <dev (at) aboehler (dot) at>
+ *
+ * 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\user_sql\HashAlgorithm;
+
+/**
+ * MD5 password hash implementation.
+ * @author Marcin Łojewski <dev@mlojewski.me>
+ */
+class MD5 implements HashAlgorithm
+{
+    /**
+     * @var MD5
+     */
+    private static $instance;
+
+    private function __construct()
+    {
+    }
+
+    /**
+     * @return MD5
+     */
+    public static function getInstance()
+    {
+        if (self::$instance === null) {
+            self::$instance = new MD5();
+        }
+        return self::$instance;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getVisibleName()
+    {
+        return "MD5";
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getPasswordHash($password)
+    {
+        return md5($password);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function checkPassword($password, $dbHash)
+    {
+        return md5($password) === $dbHash;
+    }
+
+    private function __clone()
+    {
+    }
+}
diff --git a/lib/HashAlgorithm/SHA1.php b/lib/HashAlgorithm/SHA1.php
new file mode 100644
index 0000000..6913adb
--- /dev/null
+++ b/lib/HashAlgorithm/SHA1.php
@@ -0,0 +1,75 @@
+<?php
+/**
+ * Nextcloud - user_sql
+ * Copyright (C) 2012-2018 Andreas Böhler <dev (at) aboehler (dot) at>
+ *
+ * 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\user_sql\HashAlgorithm;
+
+/**
+ * SHA1 password hash implementation.
+ * @author Marcin Łojewski <dev@mlojewski.me>
+ */
+class SHA1 implements HashAlgorithm
+{
+    /**
+     * @var SHA1
+     */
+    private static $instance;
+
+    private function __construct()
+    {
+    }
+
+    /**
+     * @return SHA1
+     */
+    public static function getInstance()
+    {
+        if (self::$instance === null) {
+            self::$instance = new SHA1();
+        }
+        return self::$instance;
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getVisibleName()
+    {
+        return "SHA1";
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function getPasswordHash($password)
+    {
+        return sha1($password);
+    }
+
+    /**
+     * @inheritdoc
+     */
+    public function checkPassword($password, $dbHash)
+    {
+        return sha1($password) === $dbHash;
+    }
+
+    private function __clone()
+    {
+    }
+}
diff --git a/templates/admin.php b/templates/admin.php
index fbc35d8..a181c11 100644
--- a/templates/admin.php
+++ b/templates/admin.php
@@ -104,7 +104,7 @@ $cfgClass = 'section';
                 <p><label for="set_crypt_type"><?php p($l->t('Encryption Type')); ?></label>
                     <?php $crypt_types = array(
                         'drupal' => 'Drupal 7',
-                        'md5' => 'MD5',
+                        'MD5' => 'MD5',
                         'md5crypt' => 'MD5 Crypt',
                         'Cleartext' => 'Cleartext',
                         'mysql_encrypt' => 'mySQL ENCRYPT()',
@@ -115,7 +115,7 @@ $cfgClass = 'section';
                         'joomla2' => 'Joomla > 2.5.18 phpass',
                         'ssha256' => 'Salted SSHA256',
                         'redmine' => 'Redmine',
-                        'sha1' => 'SHA1',
+                        'SHA1' => 'SHA1',
                         'courier_md5' => 'Courier base64-encoded MD5',
                         'courier_md5raw' => 'Courier hexadecimal MD5',
                         'courier_sha1' => 'Courier base64-encoded SHA1',