38 lines
929 B
JavaScript
38 lines
929 B
JavaScript
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'use strict';
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var utils = require('./utils.js');
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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(length) {
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for (var i = 0; i < buffer.length; i++) {
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buffer[i] = parseInt(256 * Math.random());
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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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} else {
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console.log('Found strong random number source');
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}
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function randomBytes(length) {
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if (length <= 0 || length > 1024 || parseInt(length) != length) {
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throw new Error('invalid length');
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}
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var buffer = new Buffer(length);
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crypto.getRandomValues(buffer);
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return buffer;
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};
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if (crypto._weakCrypto === true) {
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utils.defineProperty(randomBytes, '_weakCrypto', true);
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}
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module.exports = randomBytes;
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