16 lines
373 B
JavaScript
16 lines
373 B
JavaScript
var createHash = require('create-hash');
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module.exports = function (seed, len) {
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var t = new Buffer('');
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var i = 0, c;
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while (t.length < len) {
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c = i2ops(i++);
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t = Buffer.concat([t, createHash('sha1').update(seed).update(c).digest()]);
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}
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return t.slice(0, len);
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};
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function i2ops(c) {
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var out = new Buffer(4);
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out.writeUInt32BE(c,0);
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return out;
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} |