mastercard-api-core/lib/security/oauth/oauth-parameters.js

Core functionality for MasterCard API

    var OAuthParameters = {};

var NONCE_LENGTH = 8;
var VALID_CHARS = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789';

var crypto = require('crypto');

/**
 *
 * @param consumerKey
 */
var clazz = function (consumerKey) {
    this.consumerKey = consumerKey;
    this.timeStamp = _generateTimestamp();
    this.nonce = _generateNonce();
    this.signatureMethod = 'RSA-SHA256';
    this.oauthVersion = '1.0';
    this.bodyHash = null;
    this.signature = '';

    this.isSet = function (value) {
        return typeof value !== "undefined" && value !== null;
    };

    this.generateBodyHash = function (body) {
        if (this.isSet(body)) {
            var shaSum = crypto.createHash('sha256');
            shaSum.update(body, 'utf8');
            this.bodyHash = shaSum.digest('base64');
        }
    };

    this.generateParametersHash = function () {
        var ret = {
            oauth_consumer_key: this.consumerKey,
            oauth_timestamp: this.timeStamp.toString(),
            oauth_nonce: this.nonce,
            oauth_signature_method: this.signatureMethod,
            oauth_version: this.oauthVersion
        };

        if (this.bodyHash) {
            ret.oauth_body_hash = this.bodyHash;
        }

        return ret;
    };

    this.addParameter = function (key, value) {
        //todo
    };
}

var _generateTimestamp = function () {
    return Math.floor(new Date().getTime() / 1000);
};

var _generateNonce = function () {
    var rnd = crypto.randomBytes(NONCE_LENGTH);
    var value = new Array(NONCE_LENGTH);
    var len = VALID_CHARS.length;

    for (var i = 0; i < NONCE_LENGTH; i++) {
        value[i] = VALID_CHARS[rnd[i] % len];
    }

    return value.join('');
};

OAuthParameters = clazz;

module.exports = OAuthParameters;

/**
 * Exposed for testing only
 */
OAuthParameters._testonly_ = {
    NONCE_LENGTH: NONCE_LENGTH,
    VALID_CHARS: VALID_CHARS
};