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// Typescript port of the uuid.js
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// Copyright (c) 2018 Sergey Smirnov
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// BSD-2-Clause License https://opensource.org/licenses/BSD-2-Clause
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//
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// uuid.js
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// Copyright (c) 2010-2012 Robert Kieffer
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// MIT License - http://opensource.org/licenses/mit-license.php
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import { MapOf } from "./interfaces";
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declare const window: any;
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declare const require: any;
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declare const Buffer: any;
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const _window: any = "undefined" !== typeof window ? window : null;
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interface WritableArrayLike<T> {
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length: number;
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[n: number]: T;
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}
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// Unique ID creation requires a high quality random # generator. We
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// feature
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// detect to determine the best RNG source, normalizing to a function
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// that
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// returns 128-bits of randomness, since that's what's usually required
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let _rng: () => WritableArrayLike<number> = () => [];
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function setupBrowser() {
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// Allow for MSIE11 msCrypto
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const _crypto = _window.crypto || _window.msCrypto;
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if (!_rng && _crypto && _crypto.getRandomValues) {
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// WHATWG crypto-based RNG - http://wiki.whatwg.org/wiki/Crypto
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//
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// Moderately fast, high quality
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try {
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const _rnds8 = new Uint8Array(16);
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_rng = function whatwgRNG() {
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_crypto.getRandomValues(_rnds8);
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return _rnds8;
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};
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_rng();
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} catch (e) { /**/ }
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}
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if (!_rng) {
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// Math.random()-based (RNG)
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//
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// If all else fails, use Math.random(). It's fast, but is of
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// unspecified
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// quality.
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const _rnds = new Array<number>(16);
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_rng = () => {
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for (let i = 0, r = 0; i < 16; i++) {
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if ((i & 0x03) === 0) {
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r = Math.random() * 0x100000000;
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}
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_rnds[i] = r >>> ((i & 0x03) << 3) & 0xff;
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}
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return _rnds;
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};
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// if ("undefined" !== typeof console && console.warn) {
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// console.warn("[SECURITY] node-uuid: crypto not usable, falling back to insecure Math.random()");
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// }
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}
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}
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function setupNode() {
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// Node.js crypto-based RNG -
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// http://nodejs.org/docs/v0.6.2/api/crypto.html
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//
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// Moderately fast, high quality
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if ("function" === typeof require) {
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try {
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const _rb = require("crypto").randomBytes;
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_rng = _rb && (() => _rb(16));
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_rng();
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} catch (e) { /**/ }
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}
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}
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if (_window) {
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setupBrowser();
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} else {
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setupNode();
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}
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// Buffer class to use
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const BufferClass = ("function" === typeof Buffer) ? Buffer : Array;
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// Maps for number <-> hex string conversion
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const _byteToHex: string[] = [];
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const _hexToByte: MapOf<number> = {};
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for (let i = 0; i < 256; i++) {
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_byteToHex[i] = (i + 0x100).toString(16).substr(1);
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_hexToByte[_byteToHex[i]] = i;
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}
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// **`parse()` - Parse a UUID into it's component bytes**
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function _parse(s: string, buf: number[] = [], offset?: number): number[] {
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const i = (buf && offset) || 0; let ii = 0;
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s.toLowerCase().replace(/[0-9a-f]{2}/g, oct => {
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if (ii < 16) { // Don't overflow!
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buf[i + ii++] = _hexToByte[oct];
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}
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return "";
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});
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// Zero out remaining bytes if string was short
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while (ii < 16) {
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buf[i + ii++] = 0;
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}
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return buf;
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}
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// **`unparse()` - Convert UUID byte array (ala parse()) into a string**
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function _unparse(buf: ArrayLike<number>, offset?: number): string {
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let i = offset || 0; const bth = _byteToHex;
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return bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]] +
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bth[buf[i++]] + "-" + bth[buf[i++]] + bth[buf[i++]] + "-" +
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bth[buf[i++]] + bth[buf[i++]] + "-" + bth[buf[i++]] +
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bth[buf[i++]] + "-" + bth[buf[i++]] + bth[buf[i++]] +
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bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]] + bth[buf[i++]];
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}
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// **`v1()` - Generate time-based UUID**
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//
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// Inspired by https://github.com/LiosK/UUID.js
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// and http://docs.python.org/library/uuid.html
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// random #'s we need to init node and clockseq
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const _seedBytes = _rng();
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// Per 4.5, create and 48-bit node id, (47 random bits + multicast bit =
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// 1)
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const _nodeId = [
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_seedBytes[0] | 0x01,
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_seedBytes[1],
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_seedBytes[2],
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_seedBytes[3],
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_seedBytes[4],
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_seedBytes[5]
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];
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// Per 4.2.2, randomize (14 bit) clockseq
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let _clockseq = (_seedBytes[6] << 8 | _seedBytes[7]) & 0x3fff;
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// Previous uuid creation time
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let _lastMSecs = 0; let _lastNSecs = 0;
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interface V1Options {
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clockseq?: number;
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msecs?: number;
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nsecs?: number;
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node?: number[];
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}
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// See https://github.com/broofa/node-uuid for API details
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function _v1(options?: V1Options): string;
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function _v1(options: V1Options, buf: number[], offset?: number): number[];
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function _v1(options: V1Options = {}, buf?: number[], offset?: number): string | number[] {
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let i = buf && offset || 0;
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const b = buf || [];
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let clockseq = (options.clockseq != null) ? options.clockseq : _clockseq;
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// UUID timestamps are 100 nano-second units since the Gregorian
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// epoch,
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// (1582-10-15 00:00). JSNumbers aren't precise enough for this, so
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// time is handled internally as 'msecs' (integer milliseconds) and
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// 'nsecs'
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// (100-nanoseconds offset from msecs) since unix epoch, 1970-01-01
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// 00:00.
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let msecs = (options.msecs != null) ? options.msecs : new Date()
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.getTime();
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// Per 4.2.1.2, use count of uuid's generated during the current
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// clock
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// cycle to simulate higher resolution clock
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let nsecs = (options.nsecs != null) ? options.nsecs : _lastNSecs + 1;
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// Time since last uuid creation (in msecs)
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const dt = (msecs - _lastMSecs) + (nsecs - _lastNSecs) / 10000;
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// Per 4.2.1.2, Bump clockseq on clock regression
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if (dt < 0 && options.clockseq == null) {
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clockseq = clockseq + 1 & 0x3fff;
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}
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// Reset nsecs if clock regresses (new clockseq) or we've moved onto
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// a new
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// time interval
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if ((dt < 0 || msecs > _lastMSecs) && options.nsecs == null) {
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nsecs = 0;
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}
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// Per 4.2.1.2 Throw error if too many uuids are requested
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if (nsecs >= 10000) {
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throw new Error(
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"uuid.v1(): Can't create more than 10M uuids/sec");
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}
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_lastMSecs = msecs;
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_lastNSecs = nsecs;
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_clockseq = clockseq;
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// Per 4.1.4 - Convert from unix epoch to Gregorian epoch
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msecs += 12219292800000;
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// `time_low`
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const tl = ((msecs & 0xfffffff) * 10000 + nsecs) % 0x100000000;
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b[i++] = tl >>> 24 & 0xff;
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b[i++] = tl >>> 16 & 0xff;
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b[i++] = tl >>> 8 & 0xff;
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b[i++] = tl & 0xff;
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// `time_mid`
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const tmh = (msecs / 0x100000000 * 10000) & 0xfffffff;
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b[i++] = tmh >>> 8 & 0xff;
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b[i++] = tmh & 0xff;
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// `time_high_and_version`
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b[i++] = tmh >>> 24 & 0xf | 0x10; // include version
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b[i++] = tmh >>> 16 & 0xff;
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// `clock_seq_hi_and_reserved` (Per 4.2.2 - include variant)
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b[i++] = clockseq >>> 8 | 0x80;
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// `clock_seq_low`
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b[i++] = clockseq & 0xff;
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// `node`
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const node = options.node || _nodeId;
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for (let n = 0; n < 6; n++) {
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b[i + n] = node[n];
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}
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return buf ? buf : _unparse(b);
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}
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interface V4Opptions {
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rng?: () => WritableArrayLike<number>;
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random?: number[];
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}
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// **`v4()` - Generate random UUID**
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// See https://github.com/broofa/node-uuid for API details
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function _v4(options?: V4Opptions): string;
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function _v4(options: V4Opptions, buf: number[], offset?: number): number[];
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function _v4(options: V4Opptions = {}, buf?: number[], offset?: number): string | number[] {
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// Deprecated - 'format' argument, as supported in v1.2
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const i = buf && offset || 0;
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const rnds = options.random || (options.rng || _rng)();
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// Per 4.4, set bits for version and `clock_seq_hi_and_reserved`
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rnds[6] = (rnds[6] & 0x0f) | 0x40;
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rnds[8] = (rnds[8] & 0x3f) | 0x80;
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// Copy bytes to buffer, if provided
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if (buf) {
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for (let ii = 0; ii < 16; ii++) {
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buf[i + ii] = rnds[ii];
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}
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}
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return buf || _unparse(rnds);
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}
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function _Uuid() {
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return _v4();
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}
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namespace _Uuid {
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export const v4 = _v4;
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export const v1 = _v1;
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export const empty = "00000000-0000-0000-0000-000000000000";
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export const parse = _parse;
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export const Uuid = _v4;
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}
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export = _Uuid;
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