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28 lines
721 B
28 lines
721 B
'use strict'; |
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var crypto = require('crypto'); |
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// This string has length 32, a power of 2, so the modulus doesn't introduce a |
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// bias. |
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var _randomStringChars = 'abcdefghijklmnopqrstuvwxyz012345'; |
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module.exports = { |
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string: function(length) { |
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var max = _randomStringChars.length; |
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var bytes = crypto.randomBytes(length); |
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var ret = []; |
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for (var i = 0; i < length; i++) { |
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ret.push(_randomStringChars.substr(bytes[i] % max, 1)); |
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} |
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return ret.join(''); |
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} |
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, number: function(max) { |
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return Math.floor(Math.random() * max); |
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} |
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, numberString: function(max) { |
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var t = ('' + (max - 1)).length; |
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var p = new Array(t + 1).join('0'); |
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return (p + this.number(max)).slice(-t); |
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} |
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};
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