angular2-uuid
Version:
Angular 2 / TypeScript crypto-secure UUID generator
37 lines • 1.64 kB
JavaScript
"use strict";
var UUID = (function () {
function UUID() {
// no-op
}
UUID.UUID = function () {
if (typeof (window) !== "undefined" && typeof (window.crypto) !== "undefined" && typeof (window.crypto.getRandomValues) !== "undefined") {
// If we have a cryptographically secure PRNG, use that
// http://stackoverflow.com/questions/6906916/collisions-when-generating-uuids-in-javascript
var buf = new Uint16Array(8);
window.crypto.getRandomValues(buf);
return (this.pad4(buf[0]) + this.pad4(buf[1]) + "-" + this.pad4(buf[2]) + "-" + this.pad4(buf[3]) + "-" + this.pad4(buf[4]) + "-" + this.pad4(buf[5]) + this.pad4(buf[6]) + this.pad4(buf[7]));
}
else {
// Otherwise, just use Math.random
// https://stackoverflow.com/questions/105034/create-guid-uuid-in-javascript
// https://stackoverflow.com/questions/11605068/why-does-jshint-argue-against-bitwise-operators-how-should-i-express-this-code
return this.random4() + this.random4() + "-" + this.random4() + "-" + this.random4() + "-" +
this.random4() + "-" + this.random4() + this.random4() + this.random4();
}
};
UUID.pad4 = function (num) {
var ret = num.toString(16);
while (ret.length < 4) {
ret = "0" + ret;
}
return ret;
};
UUID.random4 = function () {
return Math.floor((1 + Math.random()) * 0x10000)
.toString(16)
.substring(1);
};
return UUID;
}());
exports.UUID = UUID;
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