@lyra/form-builder/lib/inputs/ArrayInput/randomKey.js

Lyra form builder

'use strict';

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = randomKey;

var _getRandomValues = require('get-random-values');

var _getRandomValues2 = _interopRequireDefault(_getRandomValues);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

// WHATWG crypto RNG - https://w3c.github.io/webcrypto/Overview.html
function whatwgRNG(length = 16) {
  const rnds8 = new Uint8Array(length);
  (0, _getRandomValues2.default)(rnds8);
  return rnds8;
}

const byteToHex = [];
for (let i = 0; i < 256; ++i) {
  byteToHex[i] = (i + 0x100).toString(16).substring(1);
}

function randomKey(length) {
  return whatwgRNG(length).reduce((str, n) => str + byteToHex[n], '').slice(0, length);
}