AES-256 with CBC Mode encryptor

Encryptors/AES256CBCEncryptor.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace VMelnik\DoctrineEncryptBundle\Encryptors;
+
+/**
+ * Class for AES256 with CBC Mode encryption
+ * 
+ * @author Dody Suria Wijaya <dodysw@gmail.com>
+ */
+class AES256CBCEncryptor implements EncryptorInterface {
+
+    /**
+     * @var string
+     */
+    private $secretKey;
+
+    /**
+     * @var int 
+     */
+	private $ivSize;
+
+    /**
+     * {@inheritdoc}
+     */
+    public function __construct($key) {
+        $this->secretKey = md5($key);
+		$this->ivSize = mcrypt_get_iv_size(
+			MCRYPT_RIJNDAEL_256, 
+			MCRYPT_MODE_CBC
+		);
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function encrypt($data) {
+		$iv = mcrypt_create_iv( $this->ivSize, MCRYPT_RAND);
+		return trim(base64_encode(
+			$iv . 
+			mcrypt_encrypt(
+				MCRYPT_RIJNDAEL_256,
+				$this->secretKey,
+				$data,
+				MCRYPT_MODE_CBC,
+				$iv
+        )));
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    function decrypt($data) {
+		$chipertext = base64_decode($data);
+		if (strlen($chipertext) < $this->ivSize) {
+			return null;
+		}
+        return trim(mcrypt_decrypt(
+            MCRYPT_RIJNDAEL_256,
+            $this->secretKey,
+			substr($chipertext, $this->ivSize),
+            MCRYPT_MODE_CBC,
+			substr($chipertext, 0, $this->ivSize)
+        ));
+    }
+}