freedomjs/freedom

/*globals console, crypto */
/*jslint indent:2, node:true */
var util = require('../../src/util');

/**
 * A Core provider for getting cryptographically random buffers. This
 * functionality may not exist in all unpriviledged contexts - namely at this
 * point, firefox addon workers.
 * @Class Core_crypto
 * @constructor
 * @param {module:Module} cap The module creating this provider.
 */
var Core_crypto = function(cap, dispatchEvent) {
  'use strict';
  this.dispatchEvent = dispatchEvent;
  util.handleEvents(this);
};

/**
 * Get a random buffer of some number of bytes.
 * @param {String} str The string to send.
 * @param {Function} continuation Function to call when sending is complete.
 * @method send
 */
 Core_crypto.prototype.getRandomBytes = function(number, continuation) {
   'use strict';
   var buffer = new Uint8Array(number);
   crypto.getRandomValues(buffer);
   continuation(buffer.buffer);
};

exports.provider = Core_crypto;
exports.name = "core.crypto";