mirror of
https://github.com/idanoo/GoScrobble.git
synced 2024-11-25 01:45:15 +00:00
20 lines
423 B
JavaScript
20 lines
423 B
JavaScript
var createHash = require('create-hash')
|
|
var Buffer = require('safe-buffer').Buffer
|
|
|
|
module.exports = function (seed, len) {
|
|
var t = Buffer.alloc(0)
|
|
var i = 0
|
|
var c
|
|
while (t.length < len) {
|
|
c = i2ops(i++)
|
|
t = Buffer.concat([t, createHash('sha1').update(seed).update(c).digest()])
|
|
}
|
|
return t.slice(0, len)
|
|
}
|
|
|
|
function i2ops (c) {
|
|
var out = Buffer.allocUnsafe(4)
|
|
out.writeUInt32BE(c, 0)
|
|
return out
|
|
}
|