react-native-quick-crypto/lib/module/scrypt.js

A fast implementation of Node's `crypto` module written in C/C++ JSI

"use strict";

import { Buffer } from '@craftzdog/react-native-buffer';
import { NitroModules } from 'react-native-nitro-modules';
import { binaryLikeToArrayBuffer } from './utils';
// Lazy load native module
let native;
function getNative() {
  if (native == null) {
    native = NitroModules.createHybridObject('Scrypt');
  }
  return native;
}
const defaults = {
  N: 16384,
  r: 8,
  p: 1,
  maxmem: 32 * 1024 * 1024
};
function getScryptParams(options) {
  const N = options?.N ?? options?.cost ?? defaults.N;
  const r = options?.r ?? options?.blockSize ?? defaults.r;
  const p = options?.p ?? options?.parallelization ?? defaults.p;
  const maxmem = options?.maxmem ?? defaults.maxmem;
  return {
    N,
    r,
    p,
    maxmem
  };
}
function validateCallback(callback) {
  if (callback === undefined || typeof callback !== 'function') {
    throw new Error('No callback provided to scrypt');
  }
}
function sanitizeInput(input, name) {
  try {
    return binaryLikeToArrayBuffer(input);
  } catch {
    throw new Error(`${name} must be a string, a Buffer, a typed array, or a DataView`);
  }
}
export function scrypt(password, salt, keylen, options, callback) {
  let cb;
  let opts;
  if (typeof options === 'function') {
    cb = options;
    opts = undefined;
  } else {
    cb = callback;
    opts = options;
  }
  validateCallback(cb);
  try {
    const {
      N,
      r,
      p,
      maxmem
    } = getScryptParams(opts);
    const sanitizedPassword = sanitizeInput(password, 'Password');
    const sanitizedSalt = sanitizeInput(salt, 'Salt');
    if (keylen < 0) {
      throw new TypeError('Bad key length');
    }
    const nativeMod = getNative();
    nativeMod.deriveKey(sanitizedPassword, sanitizedSalt, N, r, p, maxmem, keylen).then(res => {
      cb(null, Buffer.from(res));
    }, err => {
      cb(err);
    });
  } catch (err) {
    cb(err);
  }
}
export function scryptSync(password, salt, keylen, options) {
  const {
    N,
    r,
    p,
    maxmem
  } = getScryptParams(options);
  const sanitizedPassword = sanitizeInput(password, 'Password');
  const sanitizedSalt = sanitizeInput(salt, 'Salt');
  if (keylen < 0) {
    throw new TypeError('Bad key length');
  }
  const nativeMod = getNative();
  const result = nativeMod.deriveKeySync(sanitizedPassword, sanitizedSalt, N, r, p, maxmem, keylen);
  return Buffer.from(result);
}
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