PHP AES

aes.php

<?php
class MCrypt {
    private $hex_iv = '00000000000000000000000000000000'; # converted JAVA byte code in to HEX and placed it here           
    private $key = 'U1MjU1M0FDOUZ.Qz'; #Same as in JAVA
    function __construct() {
        $this->key = hash('sha256', $this->key, true);
        //echo $this->key.'<br/>';
    }
    function encrypt($str) {   
        $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
        mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));
        $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
        $pad = $block - (strlen($str) % $block);
        $str .= str_repeat(chr($pad), $pad);
        $encrypted = mcrypt_generic($td, $str);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);    
        return base64_encode($encrypted);
    }
    function decrypt($code) {    
        $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');
        mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));
        $str = mdecrypt_generic($td, base64_decode($code));
        $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
        mcrypt_generic_deinit($td);
        mcrypt_module_close($td);    
        return $this->strippadding($str);           
    }
    /*
      For PKCS7 padding
     */
    private function addpadding($string, $blocksize = 16) {
        $len = strlen($string);
        $pad = $blocksize - ($len % $blocksize);
        $string .= str_repeat(chr($pad), $pad);
        return $string;
    }
    private function strippadding($string) {
        $slast = ord(substr($string, -1));
        $slastc = chr($slast);
        $pcheck = substr($string, -$slast);
        if (preg_match("/$slastc{" . $slast . "}/", $string)) {
            $string = substr($string, 0, strlen($string) - $slast);
            return $string;
        } else {
            return false;
        }
    }
function hexToStr($hex)
{
    $string='';
    for ($i=0; $i < strlen($hex)-1; $i+=2)
    {
        $string .= chr(hexdec($hex[$i].$hex[$i+1]));
    }
    return $string;
}
}
$encryption = new MCrypt();
echo $encryption->encrypt('123456') . "<br/>";
echo $encryption->decrypt('tpyxISJ83dqEs3uw8bN/+w==');

?>

aes2.php

//https://gist.github.com/tlarevo/b65c94b02993fd50fc68

<?php
// Credit should be given to;
// https://gist.github.com/bradbernard/7789c2dd8d17c2d8304b#file-php-encyrption
// https://gist.github.com/krzyzanowskim/043be69ab3ba9fd5ba58#file-encryptaeswithphp

$data = '{"verification_code":"123456"}';
$key = '1234567890123456';

function aesEncrypt($data, $key) {
	$data = addPadding($data);
	$ivSize = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
	$iv = mcrypt_create_iv($ivSize, MCRYPT_RAND);
	$cipherText = mcrypt_encrypt(MCRYPT_RIJNDAEL_128, $key, $data, MCRYPT_MODE_CBC, $iv);
	$result = base64_encode($iv.$cipherText);
	return $result;
}


function aesDecrypt($base64encodedCipherText, $key) {
	$ivSize = mcrypt_get_iv_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);
	$iv = mcrypt_create_iv($ivSize, MCRYPT_RAND);
	$cipherText = base64_decode($base64encodedCipherText);
	if (strlen($cipherText) < $ivSize) {
		throw new Exception('Missing initialization vector');
	} 
	$iv = substr($cipherText, 0, $ivSize);
	$cipherText = substr($cipherText, $ivSize);
	
	$result = mcrypt_decrypt(MCRYPT_RIJNDAEL_128, $key, $cipherText, MCRYPT_MODE_CBC, $iv);
	$result = stripPadding(rtrim($result, chr(0x0b)));
	return $result;
}

function addPadding($value){
	$pad = 16 - (strlen($value) % 16);
    	return $value.str_repeat(chr($pad), $pad);
}
 
function stripPadding($value){
  	$pad = ord($value[($len = strlen($value)) - 1]);
  	return paddingIsValid($pad, $value) ? substr($value, 0, $len - $pad) : $value;
}
 
function paddingIsValid($pad, $value){
    	$beforePad = strlen($value) - $pad;
    	return substr($value, $beforePad) == str_repeat(substr($value, -1), $pad);
}

$base64encodedCipherText = aesEncrypt($data, $key);
print($base64encodedCipherText);
print("<br />");
$decryptedText = aesDecrypt($base64encodedCipherText, $key);
print($decryptedText);
print("<br />");
$base64encodedCipherText2 = "aAQ7PWP50FtUv37VxItEIVl6kPXdFm/xiA1ROxAuKthmCj4+L4CWix4pyzbq+I/q"; // Encoded and Ciphered string generated by Swift
$decryptedText2 = stripPadding(aesDecrypt($base64encodedCipherText2, $key));
print($decryptedText2);




?>