dynatrace-cordova-outsystems-plugin/node_modules/cryptiles/lib/index.js

This plugin gives you the ability to use the Dynatrace instrumentation in your hybrid application (Cordova, Ionic, ..). It uses the Mobile Agent, the JavaScript Agent and the Javascript Bridge. The Mobile Agent will give you all device specific values con

// Load modules

var Crypto = require('crypto');
var Boom = require('boom');


// Declare internals

var internals = {};


// Generate a cryptographically strong pseudo-random data

exports.randomString = function (size) {

    var buffer = exports.randomBits((size + 1) * 6);
    if (buffer instanceof Error) {
        return buffer;
    }

    var string = buffer.toString('base64').replace(/\+/g, '-').replace(/\//g, '_').replace(/\=/g, '');
    return string.slice(0, size);
};


exports.randomBits = function (bits) {

    if (!bits ||
        bits < 0) {

        return Boom.internal('Invalid random bits count');
    }

    var bytes = Math.ceil(bits / 8);
    try {
        return Crypto.randomBytes(bytes);
    }
    catch (err) {
        return Boom.internal('Failed generating random bits: ' + err.message);
    }
};


// Compare two strings using fixed time algorithm (to prevent time-based analysis of MAC digest match)

exports.fixedTimeComparison = function (a, b) {

    if (typeof a !== 'string' ||
        typeof b !== 'string') {

        return false;
    }

    var mismatch = (a.length === b.length ? 0 : 1);
    if (mismatch) {
        b = a;
    }

    for (var i = 0, il = a.length; i < il; ++i) {
        var ac = a.charCodeAt(i);
        var bc = b.charCodeAt(i);
        mismatch |= (ac ^ bc);
    }

    return (mismatch === 0);
};