41 lines
1000 B
JavaScript
41 lines
1000 B
JavaScript
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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 = typeof window !== 'undefined' ? (window.crypto || window.msCrypto) : null
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function windowBytes (out, n) {
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for (var i = 0; i < n; i += QUOTA) {
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crypto.getRandomValues(out.subarray(i, i + 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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out.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) {
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return windowBytes
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} else if (typeof require !== 'undefined') {
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// Node.js.
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crypto = require('cry' + 'pto');
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if (crypto && crypto.randomBytes) {
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return nodeBytes
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}
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}
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return noImpl
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})()
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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.length)
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}
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