AES Encryption

Merchant server must decrypt aesToken to get real token and store it in the Merchant's system. Decrypting payment token by AES algorithm will require secret key, which can be found in https://business.momo.vn Example:

private static String decrypt_AES(String sercretKey, String encryptData) {
    try {
        IvParameterSpec iv = new IvParameterSpec(new byte[16]);
        SecretKeySpec skeySpec = new SecretKeySpec(sercretKey.getBytes("UTF-8"), "AES");
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
        cipher.init(Cipher.DECRYPT_MODE, skeySpec, iv);
        byte[] original = cipher.doFinal(Base64.decodeBase64(encryptData));
        return new String(original);
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return "";
}

Data before encrypt RSA

{
  "partnerCode": "MOMOIQA420180417",
  "partnerRefId": "Merchant123556666",
  "partnerTransId": "8374736463",
  "amount": 40000,
  "description": "Thanh toan momo"
}

Data after encrypt RSA

A7WFmmnpn6TRX42Akh/iC5DdU5hhBT9LR5QSG6rJAl70hfEkkGUx2pTCai8s+M9KMVUcJ7m52iv74yhmeEjjN10TtEJoqITBIYBG2bqcTprhDijyhV4ePU7ytDNuLxzzIvGfTYyvbsEJ2jZTSf556yod12vhYqOJSFL/U2hVuxjUahf5Rnu5R/OLalg8QmlU6nQooEuNdzEXPMd6j9EaxOCiB2oM5/9QiTN0tCNSTIVvPtnlHu5mIbBHChcwfToIL4IAiD1nbrlDuBX//CZcrZj6hFqjvU31yb/DuG02c3aqWxbZKZ8csOwF9bL30m/yGr/0BQUWgunpDPrmCosf9A==

Online tools, try yourself