41 lines
1.0 KiB
JavaScript
41 lines
1.0 KiB
JavaScript
var assert = require('nanoassert')
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var randombytes = (function () {
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var QUOTA = 65536 // limit for QuotaExceededException
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var crypto = globalThis.crypto || globalThis.msCrypto
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function browserBytes (out, n) {
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for (let i = 0; i < n; i += QUOTA) {
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crypto.getRandomValues(new Uint8Array(out.buffer, i + out.byteOffset, Math.min(n - i, QUOTA)))
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}
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}
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function nodeBytes (out, n) {
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new Uint8Array(out.buffer, out.byteOffset, n).set(crypto.randomBytes(n))
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}
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function noImpl () {
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throw new Error('No secure random number generator available')
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}
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if (crypto && crypto.getRandomValues) return browserBytes
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if (require != null) {
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// Node.js. Bust Browserify
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crypto = require('cry' + 'pto')
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if (crypto && crypto.randomBytes) return nodeBytes
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}
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return noImpl
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})()
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// Make non enumerable as this is an internal function
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Object.defineProperty(module.exports, 'randombytes', {
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value: randombytes
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})
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module.exports.randombytes_buf = function (out) {
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assert(out, 'out must be given')
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randombytes(out, out.byteLength)
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}
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