react-native-randombytes

Usage

``js
import { randomBytes } from 'react-native-randombytes'

// synchronous API
// uses SJCL
const rand = randomBytes(4)

// asynchronous API
// uses iOS-side SecRandomCopyBytes
randomBytes(4, (err, bytes) => {
// bytes is a Buffer object
console.log(bytes.toString('hex'))
})
`

Installation

1. Follow the steps in the next section
1. You have two options depending on your needs:
1. if you're trying to get Node.js or browser crypto modules working in React Native, follow the installation workflow in react-native-crypto.
1. if you only need asynchronous random bytes generation, and don't care about getting back Buffer objects, you can do the following:

`js
import { NativeModules } from 'react-native'
const { RNRandomBytes } = NativeModules
RNRandomBytes.randomBytes(32, (err, bytes) => {
// bytes is a base64string
})
`

$3

`bash
react-native link
`

$3

If Automatic installation failed you, dry your tears and read on.

#### iOS

* Drag RNRandomBytes.xcodeproj from node_modules/react-native-randombytes into your XCode project.

* Click on the project in XCode, go to Build Phases, then Link Binary With Libraries and add libRNRandomBytes.a

Confused? See an example with screenshots here


#### Android

* Update Gradle Settings

`gradle
// file: android/settings.gradle
...

include ':randombytes', ':app'
project(':randombytes').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-randombytes/android')
`

* Update Gradle Build

`gradle
// file: android/app/build.gradle
...

dependencies {
...
compile project(':randombytes')
}
`

* Register React Package

`java
...
import com.bitgo.randombytes.RandomBytesPackage // import

public class MainActivity extends Activity implements DefaultHardwareBackBtnHandler {

private ReactInstanceManager mReactInstanceManager;
private ReactRootView mReactRootView;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mReactRootView = new ReactRootView(this);
mReactInstanceManager = ReactInstanceManager.builder()
.setApplication(getApplication())
.setBundleAssetName("index.android.bundle")
.setJSMainModuleName("index.android")
.addPackage(new MainReactPackage())
.addPackage(new RandomBytesPackage()) // register package here
.setUseDeveloperSupport(BuildConfig.DEBUG)
.setInitialLifecycleState(LifecycleState.RESUMED)
.build();
mReactRootView.startReactApplication(mReactInstanceManager, "AwesomeProject", null);
setContentView(mReactRootView);
}
...

`

$3

`bash
react-native link react-native-randombytes
``

Depending on your project versions and the state of RN-Windows this may not always work. If it does not, a manual installation guide can be found here:

https://github.com/Microsoft/react-native-windows/blob/master/docs/LinkingLibrariesWindows.md