1 files changed, 52 insertions, 0 deletions
diff --git a/lib/private/Security/CSRF/CsrfTokenGenerator.php b/lib/private/Security/CSRF/CsrfTokenGenerator.php
new file mode 100644
index 00000000000..6ea71636d22
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+++ b/lib/private/Security/CSRF/CsrfTokenGenerator.php
@@ -0,0 +1,52 @@
+<?php
+/**
+ * @author Lukas Reschke <lukas@owncloud.com>
+ *
+ * @copyright Copyright (c) 2016, ownCloud, Inc.
+ * @license AGPL-3.0
+ *
+ * This code is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3,
+ * as published by the Free Software Foundation.
+ *
+ * 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, version 3,
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+namespace OC\Security\CSRF;
+
+use OCP\Security\ISecureRandom;
+
+/**
+ * Class CsrfTokenGenerator is used to generate a cryptographically secure
+ * pseudo-random number for the token.
+ *
+ * @package OC\Security\CSRF
+ */
+class CsrfTokenGenerator {
+	/** @var ISecureRandom  */
+	private $random;
+
+	/**
+	 * @param ISecureRandom $random
+	 */
+	public function __construct(ISecureRandom $random) {
+		$this->random = $random;
+	}
+
+	/**
+	 * Generate a new CSRF token.
+	 *
+	 * @param int $length Length of the token in characters.
+	 * @return string
+	 */
+	public function generateToken($length = 32) {
+		return $this->random->generate($length);
+	}
+}