react-native-rsa-native

A native implementation of RSA key generation and encryption/decryption, sign/verify. Keychain implementation Implementation is in PKCS1

Status

Android: Generation, Encryption, Decryption, Sign, Verify, keychain support iOS: Generation, Encryption, Decryption, Sign, Verify, keychain support

*Need to check cross platform encrypt/decrypt

Getting started

$ yarn add react-native-rsa-native

or:

$ npm install react-native-rsa-native --save

Mostly automatic installation:

$ react-native link react-native-rsa-native

iOS

In your React Native Xcode project, right click on your project and go 'Add Files to ...', then navigate to /node_modules/react-native-rsa-native/ios and select the RNRSA.xcodeproj file. Then in the build settings for your target under 'Link Binary With Libraries', add libRNRSA.a.

Usage

import {RSA, RSAKeychain} from 'react-native-rsa-native';

RSA.generate()
  .then(keys => {
    console.log(keys.private) // the private key
    console.log(keys.public) // the public key
    RSA.encrypt('1234', keys.public)
      .then(encodedMessage => {
        RSA.decrypt(encodedMessage, keys.private)
          .then(message => {
            console.log(message);
          })
        })

    RSA.sign(secret, keys.private)
      .then(signature => {
        console.log(signature);

        RSA.verify(signature, secret, keys.public)
          .then(valid => {
            console.log(valid);
          })
        })
  })

// Example utilizing the keychain for private key secure storage

let keyTag = 'com.domain.mykey';
let secret = "secret message";

RSAKeychain.generate(keyTag)
  .then(keys => {
    console.log(keys.public);
    console.log(secret);

    RSAKeychain.encrypt(secret, keyTag)
      .then(encodedMessage => {
        console.log(encodedMessage);

        RSAKeychain.decrypt(encodedMessage, keyTag)
          .then(message => {
            console.log(message);
          })
        })

    RSAKeychain.sign(secret, keyTag)
      .then(signature => {
        console.log(signature);

        RSAKeychain.verify(signature, secret, keyTag)
          .then(valid => {
            console.log(valid);
          })
        })
  });

Credit

• Originally based on https://github.com/SamSaffron/react-native-key-pair
• iOS implementation reference