61 lines
2.4 KiB
JavaScript
61 lines
2.4 KiB
JavaScript
/**
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* Copyright 2023 Google LLC.
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* Copyright (c) Microsoft Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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function bytesToHex(bytes) {
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return bytes.reduce((str, byte) => str + byte.toString(16).padStart(2, '0'), '');
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}
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/**
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* Generates a random v4 UUID, as specified in RFC4122.
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*
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* Uses the native Web Crypto API if available, otherwise falls back to a
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* polyfill.
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*
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* Example: '9b1deb4d-3b7d-4bad-9bdd-2b0d7b3dcb6d'
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*/
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export function uuidv4() {
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// Available only in secure contexts
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// https://developer.mozilla.org/en-US/docs/Web/API/Web_Crypto_API
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if ('crypto' in globalThis && 'randomUUID' in globalThis.crypto) {
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// Node with
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// https://nodejs.org/dist/latest-v20.x/docs/api/globals.html#crypto_1 or
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// secure browser context.
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return globalThis.crypto.randomUUID();
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}
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const randomValues = new Uint8Array(16);
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if ('crypto' in globalThis && 'getRandomValues' in globalThis.crypto) {
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// Node (>=18) with
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// https://nodejs.org/dist/latest-v20.x/docs/api/globals.html#crypto_1 or
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// browser.
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globalThis.crypto.getRandomValues(randomValues);
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}
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else {
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// Node (<=16) without
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// https://nodejs.org/dist/latest-v20.x/docs/api/globals.html#crypto_1.
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// eslint-disable-next-line @typescript-eslint/no-require-imports
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require('crypto').webcrypto.getRandomValues(randomValues);
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}
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// Set version (4) and variant (RFC4122) bits.
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randomValues[6] = (randomValues[6] & 0x0f) | 0x40;
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randomValues[8] = (randomValues[8] & 0x3f) | 0x80;
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return [
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bytesToHex(randomValues.subarray(0, 4)),
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bytesToHex(randomValues.subarray(4, 6)),
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bytesToHex(randomValues.subarray(6, 8)),
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bytesToHex(randomValues.subarray(8, 10)),
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bytesToHex(randomValues.subarray(10, 16)),
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].join('-');
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}
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//# sourceMappingURL=uuid.js.map
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