1 files changed, 65 insertions, 0 deletions
diff --git a/Encoder/BasePasswordEncoder.php b/Encoder/BasePasswordEncoder.php
new file mode 100644
index 0000000..1378d56
--- /dev/null
+++ b/Encoder/BasePasswordEncoder.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace Symfony\Component\Security\Encoder;
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * BasePasswordEncoder is the base class for all password encoders.
+ *
+ * @author Fabien Potencier <fabien.potencier@symfony-project.com>
+ */
+abstract class BasePasswordEncoder implements PasswordEncoderInterface
+{
+    /**
+     * Demerges a merge password and salt string.
+     *
+     * @param string $mergedPasswordSalt The merged password and salt string
+     *
+     * @return array An array where the first element is the password and the second the salt
+     */
+    protected function demergePasswordAndSalt($mergedPasswordSalt)
+    {
+        if (empty($mergedPasswordSalt)) {
+            return array('', '');
+        }
+
+        $password = $mergedPasswordSalt;
+        $salt = '';
+        $saltBegins = strrpos($mergedPasswordSalt, '{');
+
+        if (false !== $saltBegins && $saltBegins + 1 < strlen($mergedPasswordSalt)) {
+            $salt = substr($mergedPasswordSalt, $saltBegins + 1, strlen($mergedPasswordSalt) - 1);
+            $password = substr($mergedPasswordSalt, 0, $saltBegins);
+        }
+
+        return array($password, $salt);
+    }
+
+    /**
+     * Merges a password and a salt.
+     *
+     * @param password the password to be used (can be <code>null</code>)
+     * @param salt the salt to be used (can be <code>null</code>)
+     *
+     * @return a merged password and salt <code>String</code>
+     */
+    protected function mergePasswordAndSalt($password, $salt) {
+        if (empty($salt)) {
+            return $password;
+        }
+
+        if (false !== strrpos($salt, '{') || false !== strrpos($salt, '}')) {
+            throw new \InvalidArgumentException('Cannot use { or } in salt.');
+        }
+
+        return $password.'{'.$salt.'}';
+    }
+}