mailiverse/web/common/Initializations.js

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JavaScript
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2013-07-21 13:40:17 -04:00
function __keydownRandomCollector__()
{
var d = new Date();
sjcl.random.addEntropy(d.valueOf(), 2, "keydown");
}
function startRandom()
{
sjcl.random.startCollectors();
if (window.addEventListener)
{
window.addEventListener("keydown", __keydownRandomCollector__, false);
}
else
if (document.attachEvent)
{
document.attachEvent("keydown", __keydownRandomCollector__);
}
if (window.crypto && (window.crypto.getRandomValues))
{
var array;
if (window.crypto.getRandomValues)
{
array = new Uint32Array(1024);
window.crypto.getRandomValues(array);
}
for (var i = 0; i < array.length; i++) {
sjcl.random.addEntropy(array[i], 32, "crypto.random");
}
}
else
{
var now = new Date();
// this is sooo lame, but firefox is not generating enough information for the random
// number generator to seed properly by the time we log in or sign up
// probably safer this way anyways
$.ajax({ url: Constants.TOMCAT_SERVER + "Random?nocache=" + now.valueOf() })
.done(function ( data ) {
var bytes = Base64.decode(data);
for (var i=0; i<bytes.length/4; ++i)
{
var o = i*4;
var n = (bytes[o+0]) |
(bytes[o+1] << 8) |
(bytes[o+2] << 16) |
(bytes[o+3] << 24);
sjcl.random.addEntropy(n, 32, "web.random");
}
});
}
}
$(function() { startRandom(); });