README.md

react-native-cryptoswift

Fork from react-native-cryptography v0.0.2

Crypto e.g. "ase-128-ccm" is invalid (always say Error: CipherFactory.createCipher(...): Unknown cipher ase-128-ccm) on iOS with react-native-quick-crypto , so be this react-native-cryptoswift .

• iOS CryptoSwift

• Android BouncyCastle !TODO finish md5 and sha256!

Cryptoswift functions

Symetric ciphering

func	ios	android
AES CCM	✓	waiting PR
AES GCM	✓	waiting PR
AES 128	waiting PR	✓
AES 192	waiting PR	✓
AES 256	waiting PR	✓

• AES 128 (pass 16 bytes key and iv)

• AES 192 (pass 24 bytes key and iv)

• AES 256 (pass 32 bytes key and iv)

Hashing

func	ios	android
MD5	waiting PR	TODO
SHA256	waiting PR	TODO

Install

$ npm install react-native-cryptoswift --save

iOS: cd ios/ && pod install

Usage

import React, { Component } from 'react';
import { Button, StyleSheet, Text, TextInput, View } from 'react-native';
import CryptoSwift from 'react-native-cryptoswift';

const styles = StyleSheet.create({
  container: {
    flex: 1,
    marginTop: 50,
    justifyContent: 'flex-start',
    alignItems: 'center',
  },
});

export default class App extends Component {
  static AES_KEY_128 = Array.from('keykeykeykeykeyk').map(char => char.charCodeAt());
  static AES_IV = Array.from('drowssapdrow').map(char => char.charCodeAt());
  static AUTH_TAG_LENGTH = 4;

  encryptAesCcm() {
    const utf8text = 'Hello, I am the message to cipher';
    const plaintext = Array.from(utf8text).map(char => char.charCodeAt());
    CryptoSwift.encryptAesCcm(plaintext, App.AES_KEY_128, App.AES_IV, App.AUTH_TAG_LENGTH)
      .then(({ciphertext, authTag}) => {
        this.encrypted = {ciphertext, authTag};
        console.log(this.encrypted);
      })
      .catch(err => console.error(err));
  }

  decryptAesCcm() {
    CryptoSwift.decryptAesCcm(this.encrypted.ciphertext, App.AES_KEY_128, App.AES_IV, this.encrypted.authTag, App.AUTH_TAG_LENGTH)
      .then(plaintext => console.log(plaintext))
      .catch(err => console.error(err));
  }

  md5() {
    // CryptoSwift.md5('string to digest').then(digest => console.log(digest));
  }

  sha256() {
    // CryptoSwift.sha256('string to digest').then(digest => console.log(digest));
  }

  render() {
    return (
      <View style={styles.container}>
        <Button onPress={this.encryptAesCcm} title={'encrypt with AES'} />
        <Button onPress={this.decryptAesCcm} title={'decrypt AES'} />
        <Button onPress={this.md5} title={'MD5'} />
        <Button onPress={this.sha256} title={'SHA256'} />
      </View>
    );
  }
}