react-native-rncrypto v0.0.2

react-native-rncrypto

Yet another crypto module for react native. This module is not a polyfill of node-crypto. It's for people who want to use some native cryptographic functions in react native.

It's based on Crypto++, a free C++ class library of cryptographic schemes.

Codes are in very initial state, and contributions are welcome.

Features

• Random bytes generating
• ECC Keypair generation (secp521r1)
• ECC Decrypt/Encrypt

Usage

install

npm i -S react-native-rncrypto
rnpm link react-native-rncrypto

import

import rncrypto from 'react-native-rncrypto';

rncrypto.randomBytes

Promise<Buffer> rncrypto.randomBytes([size:Integer = 32])

rncrypto.ecc.generateKeys

Promise<{privateKey: Buffer, publicKey: Buffer}> rncrypto.ecc.generateKeys()

rncrypto.ecc.encryt

Promise<Buffer> rncrypto.ecc.encryt(plain:Buffer, publicKey:Buffer)

rncrypto.ecc.decrypt

Promise<Buffer> rncrypto.ecc.decryt(cipher:Buffer, privateKey:Buffer)

Buffer

APIs are same with those of node's Buffer. Details can be found at https://github.com/feross/buffer.

Examples

rncrypto.randomBytes(32).then(function(random) {
  // console.log(random.toString('hex'));
  // console.log(random.toString('base64'));
});
var plain = new Buffer('Hello, world!', 'utf-8');
rncrypto.ecc.generateKeys().then(function(keys) {
  rncrypto.ecc.encrypt(plain, keys.publicKey).then(function(cipher) {
    // console.log(cipher.toString('hex'));
    rncrypto.ecc.decrypt(cipher, keys.privateKey).then(function(decrypted) {
      // console.log(decrypted.toString('hex'));
    });
  });
});

or

const random = yield rncrypto.randomBytes(32);
const plain = new Buffer('Hello, world!', 'utf-8');
const keys = yield rncrypto.ecc.generateKeys();
const cipher = yield rncrypto.ecc.encrypt(plain, keys.publicKey);
const decrypted = yield rncrypto.ecc.decrypt(cipher, keys.privateKey);

Todos

• Error handling
• Supporting more ECC curve types
• ECDSA and ECDH functions
• RSA related functions
• ...

Demo

There is a demo project can be fount at https://github.com/danielking/react-native-rncrypto-demo, and here are some screenshots below.

iOS:

Android: