uuid5/index.js

UUID v5 generator (SHA1 hash into 128 bits)

'use strict';
let crypto = require('crypto');

let uuid5 = function(str) {
  let out = crypto.createHash('sha1').update(str).digest();

  out[8] = out[8] & 0x3f | 0xa0; // set variant
  out[6] = out[6] & 0x0f | 0x50; // set version

  let hex = out.toString('hex', 0, 16);

  return [
    hex.substring(0, 8),
    hex.substring(8, 12),
    hex.substring(12, 16),
    hex.substring(16, 20),
    hex.substring(20, 32)
  ].join('-');
};

module.exports = uuid5;