38 lines
1.3 KiB
JavaScript
38 lines
1.3 KiB
JavaScript
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'use strict';
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Object.defineProperty(exports, "__esModule", { value: true });
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var bytes_1 = require("../utils/bytes");
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var properties_1 = require("../utils/properties");
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var crypto = global.crypto || global.msCrypto;
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if (!crypto || !crypto.getRandomValues) {
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console.log('WARNING: Missing strong random number source; using weak randomBytes');
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crypto = {
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getRandomValues: function (buffer) {
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for (var round = 0; round < 20; round++) {
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for (var i = 0; i < buffer.length; i++) {
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if (round) {
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buffer[i] ^= Math.trunc(256 * Math.random());
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}
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else {
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buffer[i] = Math.trunc(256 * Math.random());
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}
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}
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}
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return buffer;
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},
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_weakCrypto: true
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};
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}
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function randomBytes(length) {
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if (length <= 0 || length > 1024 || parseInt(String(length)) != length) {
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throw new Error('invalid length');
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}
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var result = new Uint8Array(length);
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crypto.getRandomValues(result);
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return bytes_1.arrayify(result);
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}
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exports.randomBytes = randomBytes;
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;
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if (crypto._weakCrypto === true) {
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properties_1.defineReadOnly(randomBytes, '_weakCrypto', true);
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}
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