Signature Algorithm

Here are the steps of how to generate a signature:

  1. Sort all non-empty parameters by name ascendingly (exclude sign parameter).
  2. Combine above parameters with its name and value sequentially into a string.
  3. Hash the string with MD5 algorithm, and then make lowercase of it.
  4. Append PrivateKey to the string, and repeat the step above. There is your signature.

Sample Codes

  • Take GetOrder as an example, combine gamekey, openid, orderid parameters name-value into a string, hash with MD5 algorithm, and make lowercase of it.
  • Append PrivateKey to the string, hash with MD5 algorithm, and make lowercase of it. There is your signature.
  • node.js sample code : 
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    var crypto = require('crypto');

var myPrivateKey = 'my_private_key';
var signData = {
    orderid: 'my_orderid',
    gamekey: 'my_gamekey',
    openid: 'my_openid'
};

var sign = get_sign(signData, myPrivateKey);

function get_md5(data) {
    data = new Buffer(data).toString("binary");
    return crypto.createHash('md5').update(data).digest('hex').toLowerCase();
}

function get_sign(post, privateKey) {
    var keys = [];

    for (key in post) {
        keys.push(key);
    }

    keys = keys.sort();
    var paramString = '';
    for (i in keys) {
        paramString += post[keys[i]];
    }

    var s1 = get_md5(paramString);
    var p2 = s1 + privateKey;
    var s2 = get_md5(p2);
    return  s2;
}

function check_sign (post, privateKey) {
    var source_sign = post.Sign;
    delete post.Sign;
    var new_sign = get_sign(post, privateKey);

    if (source_sign == new_sign) {
        return true;
    }

    return false;
}