<?php

namespace vendor\custom;

class MCrypt {

    public static function mcEncrypt($encrypt, $key) {
        $encrypt = serialize($encrypt);
        $iv = mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC), MCRYPT_DEV_URANDOM);
        $key = pack('H*', $key);
        $mac = hash_hmac('sha256', $encrypt, substr(bin2hex($key), -32));
        $passcrypt = mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $encrypt . $mac, MCRYPT_MODE_CBC, $iv);
        $encoded = base64_encode($passcrypt) . '|' . base64_encode($iv);
        return $encoded;
    }

    public static function mcDecrypt($decrypt, $key) {
        $decrypt = explode('|', $decrypt . '|');
        $decoded = base64_decode($decrypt[0]);
        $iv = base64_decode($decrypt[1]);
        if (strlen($iv) !== mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_CBC)) {
            return false;
        }
        $key = pack('H*', $key);
        $decrypted = trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, $decoded, MCRYPT_MODE_CBC, $iv));
        $mac = substr($decrypted, -64);
        $decrypted = substr($decrypted, 0, -64);
        $calcmac = hash_hmac('sha256', $decrypted, substr(bin2hex($key), -32));
        if ($calcmac !== $mac) {
            return false;
        }
        $decrypted = unserialize($decrypted);
        return $decrypted;
    }

}