20 lines
609 B
TypeScript
20 lines
609 B
TypeScript
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import { setPRNG } from "./nacl-fast.js";
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export function loadBrowserPrng() {
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// Initialize PRNG if environment provides CSPRNG.
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// If not, methods calling randombytes will throw.
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// @ts-ignore-error
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const cr = typeof self !== "undefined" ? self.crypto || self.msCrypto : null;
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const QUOTA = 65536;
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setPRNG(function (x: Uint8Array, n: number) {
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let i;
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const v = new Uint8Array(n);
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for (i = 0; i < n; i += QUOTA) {
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cr.getRandomValues(v.subarray(i, i + Math.min(n - i, QUOTA)));
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}
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for (i = 0; i < n; i++) x[i] = v[i];
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for (i = 0; i < v.length; i++) v[i] = 0;
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});
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}
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