sodium-javascript/randombytes.js

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