45 lines
1.2 KiB
JavaScript
45 lines
1.2 KiB
JavaScript
"use strict";
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import { arrayify } from "@ethersproject/bytes";
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import { Logger } from "@ethersproject/logger";
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import { version } from "./_version";
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const logger = new Logger(version);
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export { shuffled } from "./shuffle";
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let anyGlobal = null;
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try {
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anyGlobal = window;
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if (anyGlobal == null) {
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throw new Error("try next");
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}
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}
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catch (error) {
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try {
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anyGlobal = global;
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if (anyGlobal == null) {
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throw new Error("try next");
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}
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}
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catch (error) {
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anyGlobal = {};
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}
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}
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let crypto = anyGlobal.crypto || anyGlobal.msCrypto;
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if (!crypto || !crypto.getRandomValues) {
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logger.warn("WARNING: Missing strong random number source");
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crypto = {
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getRandomValues: function (buffer) {
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return logger.throwError("no secure random source avaialble", Logger.errors.UNSUPPORTED_OPERATION, {
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operation: "crypto.getRandomValues"
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});
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}
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};
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}
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export function randomBytes(length) {
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if (length <= 0 || length > 1024 || (length % 1)) {
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logger.throwArgumentError("invalid length", "length", length);
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}
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const result = new Uint8Array(length);
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crypto.getRandomValues(result);
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return arrayify(result);
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}
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;
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