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