public static function encrypt($encryptionKey, $textInput, $blockType = 'CBC', $urlSafe = false)
{
switch ($blockType) {
case 'CBC':
$cipher = new Rijndael(Rijndael::MODE_CBC);
$cipher->setKey($encryptionKey);
$iv = Random::string($cipher->getBlockLength() >> 3);
$cipher->setIV($iv);
break;
case 'ECB':
$cipher = new Rijndael(Rijndael::MODE_ECB);
$cipher->setKey($encryptionKey);
$iv = '';
break;
default:
throw new \Exception('Unknown encryption blocktype: ' . $blockType, 500);
break;
}
$encryptedResult = $iv . $cipher->encrypt($textInput);
if ($urlSafe) {
return Base64URLSafe::urlsafe_b64encode($encryptedResult);
} else {
return base64_encode($encryptedResult);
}
}
/**
* Encrypt the plain text using Rijndael algorithm
*
* @param string $plaintext Plain text
* @param string $key Paytm Merchant Key
* @return string base64 encoded encrypted string
*/
public function encryptString($plaintext, $key)
{
$cipher = new Rijndael();
$cipher->setKey($key);
$cipher->iv = $this->iv;
$encryptedString = $cipher->encrypt($plaintext);
return base64_encode($encryptedString);
}
/**
* @group github451
*/
public function testKeyPaddingRijndael()
{
// this test case is from the following URL:
// https://web.archive.org/web/20070209120224/http://fp.gladman.plus.com/cryptography_technology/rijndael/aesdvec.zip
$aes = new Rijndael();
$aes->setPreferredEngine($this->engine);
$aes->disablePadding();
$aes->setKey(pack('H*', '2b7e151628aed2a6abf7158809cf4f3c762e7160'));
// 160-bit key. Valid in Rijndael.
//$this->_checkEngine($aes); // should only work in internal mode
$ciphertext = $aes->encrypt(pack('H*', '3243f6a8885a308d313198a2e0370734'));
$this->assertEquals($ciphertext, pack('H*', '231d844639b31b412211cfe93712b880'));
}
