144fd7fb17cde4d32e9ff378f1e08e3ccc2865b5ea17d5fda61ec585bf80eeaab3d5bd4f9a6c6cfb02b8783e0a5d16aceebc68afe08644ee66ac46c0be2488 423 B

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  1. var createHash = require('create-hash')
  2. var Buffer = require('safe-buffer').Buffer
  3. module.exports = function (seed, len) {
  4. var t = Buffer.alloc(0)
  5. var i = 0
  6. var c
  7. while (t.length < len) {
  8. c = i2ops(i++)
  9. t = Buffer.concat([t, createHash('sha1').update(seed).update(c).digest()])
  10. }
  11. return t.slice(0, len)
  12. }
  13. function i2ops (c) {
  14. var out = Buffer.allocUnsafe(4)
  15. out.writeUInt32BE(c, 0)
  16. return out
  17. }