encrypt_decrypt_ccAvenue

/**
     * CCAvenue Encrypt Function
     *
     * @param $plainText
     * @param $key
     * @return string
     */
    protected function encrypt($plainText, $key)
    {
        $key           = $this->hextobin(md5($key));
        $initVector    = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);
        $openMode      = openssl_encrypt($plainText, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $initVector);
        $encryptedText = bin2hex($openMode);

        return $encryptedText;
    }
    /**
     * CCAvenue Decrypt Function
     *
     * @param $encryptedText
     * @param $key
     * @return string
     */
    protected function decrypt($encryptedText, $key)
    {
        $key = $this->hextobin(md5($key));

        $initVector = pack("C*", 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f);

        $encryptedText = $this->hextobin($encryptedText);

        $decryptedText = openssl_decrypt($encryptedText, 'AES-128-CBC', $key, OPENSSL_RAW_DATA, $initVector);

        return $decryptedText;
    }