react-native-keychain/README.md

react-native-keychain

Keychain Access for React Native. Currently functionality is limited to just storing internet and generic passwords.

New 2.0.0 with improved android implementation

The KeychainModule will now automatically use the appropriate CipherStorage implementation based on API level:

• API level 16-22 will en/de crypt using Facebook Conceal
• API level 23+ will en/de crypt using Android Keystore

Encrypted data is stored in SharedPreferences.

Installation

1 . $ npm install --save react-native-keychain

or

$ yarn add react-native-keychain

2 . $ react-native link react-native-keychain and check MainApplication.java to verify the package was added.

3 .  rebuild your project

• on Android, the setInternetCredentials(server, username, password) call will be resolved as call to setGenericPassword(username, password, server). Use the server argument to distinguish between multiple entries.

Check out the "releases" tab for breaking changes and RN version compatibility. v1.0.0 is for RN >= 0.40

❗ Enable Keychain Sharing entitlement for iOS 10

For iOS 10 you'll need to enable the Keychain Sharing entitlement in the Capabilities section of your build target. (See screenshot). Otherwise you'll experience the error shown below.

Error: {
    code = "-34018";
    domain = NSOSStatusErrorDomain;
    message = "The operation couldn\U2019t be completed. (OSStatus error -34018.)";
}

Usage

See KeychainExample for fully working project example.

import * as Keychain from 'react-native-keychain';

const username = 'zuck';
const password = 'poniesRgr8';

// Generic Password, service argument optional
Keychain
  .setGenericPassword(username, password)
  .then(function() {
    console.log('Credentials saved successfully!');
  });

// service argument optional
Keychain
  .getGenericPassword()
  .then(function(credentials) {
    console.log('Credentials successfully loaded for user ' + credentials.username);
  }).catch(function(error) {
    console.log('Keychain couldn\'t be accessed! Maybe no value set?', error);
  });

// service argument optional
Keychain
  .resetGenericPassword()
  .then(function() {
    console.log('Credentials successfully deleted');
  });

// Internet Password, server argument required
const server = 'http://facebook.com';
Keychain
  .setInternetCredentials(server, username, password)
  .then(function() {
    console.log('Credentials saved successfully!');
  });

Keychain
  .getInternetCredentials(server)
  .then(function(credentials) {
    if (credentials) {
      console.log('Credentials successfully loaded for user ' + credentials.username);
    }
  });

Keychain
  .resetInternetCredentials(server)
  .then(function() {
    console.log('Credentials successfully deleted');
  });

Keychain
  .requestSharedWebCredentials()
  .then(function(credentials) {
    if (credentials) {
      console.log('Shared web credentials successfully loaded for user ' + credentials.username);
    } 
  })

Keychain
  .setSharedWebCredentials(server, username, password)
  .then(function() {
    console.log('Shared web credentials saved successfully!');
  })

Note on security

On API levels that do not support Android keystore, Facebook Conceal is used to en/decrypt stored data. The encrypted data is then stored in SharedPreferences. Since Conceal itself stores its encryption key in SharedPreferences, it follows that if the device is rooted (or if an attacker can somehow access the filesystem), the key can be obtained and the stored data can be decrypted. Therefore, on such a device, the conceal encryption is only an obscurity. On API level 23+ the key is stored in the Android Keystore, which makes the key non-exportable and therefore makes the entire process more secure. Follow best practices and do not store user credentials on a device. Instead use tokens or other forms of authentication and re-ask for user credentials before performing sensitive operations.

Manual Installation

iOS

Option: Manually

• Right click on Libraries, select Add files to "…" and select node_modules/react-native-keychain/RNKeychain.xcodeproj
• Select your project and under Build Phases -> Link Binary With Libraries, press the + and select libRNKeychain.a.

Option: With CocoaPods

Add the following to your Podfile and run pod update:

pod 'RNKeychain', :path => '../node_modules/react-native-keychain'

Android

Option: Manually

• Edit android/settings.gradle to look like this (without the +):

  rootProject.name = 'MyApp'
  
  include ':app'
  
  + include ':react-native-keychain'
  + project(':react-native-keychain').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-keychain/android')
  

• Edit android/app/build.gradle (note: app folder) to look like this:

  apply plugin: 'com.android.application'
  
  android {
    ...
  }
  
  dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:23.0.1'
    compile 'com.facebook.react:react-native:0.19.+'
  + compile project(':react-native-keychain')
  }
  

• Edit your MainApplication.java (deep in android/app/src/main/java/...) to look like this (note two places to edit):

  package com.myapp;
  
  + import com.oblador.keychain.KeychainPackage;
  
  ....
  
  public class MainActivity extends extends ReactActivity {
  
    @Override
    protected List<ReactPackage> getPackages() {
        return Arrays.<ReactPackage>asList(
                new MainReactPackage(),
  +             new KeychainPackage()
        );
    }
    ...
  }
  

Proguard Rules

On Android builds that use proguard (like release), you may see the following error:

RNKeychainManager: no keychain entry found for service:
JNI DETECTED ERROR IN APPLICATION: JNI FindClass called with pending exception java.lang.NoSuchFieldError: no "J" field "mCtxPtr" in class "Lcom/facebook/crypto/cipher/NativeGCMCipher;" or its superclasses

If so, add a proguard rule in proguard-rules.pro:

-keep class com.facebook.crypto.** {
   *;
}

Maintainers

Joel Arvidsson Author

Vojtech Novak Maintainer

Pelle Stenild Coltau Maintainer

License

MIT © Joel Arvidsson 2016-2018