Keygen.js

Usage:

var keygen = require('keygen');

console.log(keygen('privatekey'));
console.log(keygen('random').join(''))

[ '7e8c11b0',
  'b028f783',
  'a07d19d0',
  'a1951e98',
  'a13bcfa0',
  '3c0e7937' ]

'34c86c319ce948f1806c0fb1dd49b97385a2edf3b7a2faac'