madeline-ton/dist/crypto-sync/random.js

Pure JS client-side implementation of the Telegram TON blockchain protocol

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.secureRandomInt = exports.secureRandom = exports.fastRandomInt = exports.fastRandom = void 0;

var _rng = require("../lib/rng");

var _poly = require("./poly");

var fastRandom = function fastRandom(buffer) {
  var myBuf = buffer;

  if (!(buffer instanceof Uint8Array)) {
    myBuf = new Uint8Array(buffer.buffer);
  }

  var length = myBuf.byteLength;

  for (var x = 0; x < length; x++) {
    myBuf[x] = Math.floor(Math.random() * 0xFF);
  }

  return buffer;
};
/**
 * Fill array with cryptographically secure random values
 * @param {BufferSource} buffer Buffer to fill
 */


exports.fastRandom = fastRandom;
var secureRandom;
exports.secureRandom = secureRandom;

if (_poly.useWebCryptoRandom) {
  exports.secureRandom = secureRandom = _poly.windowObject.crypto.getRandomValues.bind(_poly.windowObject.crypto);
} else {
  if (typeof window !== 'undefined' && !_poly.useWorkers) {
    window.onclick = _rng.rng_seed_time;
    window.onkeydown = _rng.rng_seed_time;
  }

  exports.secureRandom = secureRandom = function secureRandom(buffer) {
    var myBuf = buffer;

    if (!(buffer instanceof Uint8Array)) {
      myBuf = new Uint8Array(buffer.buffer);
    }

    (0, _rng.rng_get_bytes)(myBuf);
    return buffer;
  };
}
/**
 * Get non-cryptographically secure integer modulo mod
 * @param {number} mod Modulo
 * @returns number
 */


var fastRandomInt = function fastRandomInt(mod) {
  return Math.floor(Math.random() * (mod || 0xFFFFFFFF));
};
/**
 * Get cryptographically secure integer modulo mod
 * @param {number} mod Modulo
 * @returns number
 */


exports.fastRandomInt = fastRandomInt;

var secureRandomInt = function secureRandomInt(mod) {
  return secureRandom(new Uint32Array(1))[0] % (mod || 0xFFFFFFFF);
};

exports.secureRandomInt = secureRandomInt;