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@lm25ttd/react-native-app-auth

v5.1.3

Published

React Native bridge for AppAuth for supporting any OAuth 2 provider. Forked from https://github.com/FormidableLabs/react-native-app-auth for my own use.

Downloads

2

Readme

npm package version Maintenance Status

This versions supports [email protected]+. The last pre-0.60 compatible version is v4.4.0.

React Native bridge for AppAuth-iOS and AppAuth-Android SDKS for communicating with OAuth 2.0 and OpenID Connect providers.

This library should support any OAuth provider that implements the OAuth2 spec.

We only support the Authorization Code Flow.

Tested OpenID providers

These providers are OpenID compliant, which means you can use autodiscovery.

Tested OAuth2 providers

These providers implement the OAuth2 spec, but are not OpenID providers, which means you must configure the authorization and token endpoints yourself.

Why you may want to use this library

AppAuth is a mature OAuth client implementation that follows the best practices set out in RFC 8252 - OAuth 2.0 for Native Apps including using SFAuthenticationSession and SFSafariViewController on iOS, and Custom Tabs on Android. WebViews are explicitly not supported due to the security and usability reasons explained in Section 8.12 of RFC 8252.

AppAuth also supports the PKCE ("Pixy") extension to OAuth which was created to secure authorization codes in public clients when custom URI scheme redirects are used.

To learn more, read this short introduction to OAuth and PKCE on the Formidable blog.

Supported methods

See Usage for example configurations, and the included Example application for a working sample.

authorize

This is the main function to use for authentication. Invoking this function will do the whole login flow and returns the access token, refresh token and access token expiry date when successful, or it throws an error when not successful.

import { authorize } from 'react-native-app-auth';

const config = {
  issuer: '<YOUR_ISSUER_URL>',
  clientId: '<YOUR_CLIENT_ID>',
  redirectUrl: '<YOUR_REDIRECT_URL>',
  scopes: ['<YOUR_SCOPES_ARRAY>'],
};

const result = await authorize(config);

prefetchConfiguration

ANDROID This will prefetch the authorization service configuration. Invoking this function is optional and will speed up calls to authorize. This is only supported on Android.

import { prefetchConfiguration } from 'react-native-app-auth';

const config = {
  warmAndPrefetchChrome: true,
  issuer: '<YOUR_ISSUER_URL>',
  clientId: '<YOUR_CLIENT_ID>',
  redirectUrl: '<YOUR_REDIRECT_URL>',
  scopes: ['<YOUR_SCOPES_ARRAY>'],
};

prefetchConfiguration(config);

config

This is your configuration object for the client. The config is passed into each of the methods with optional overrides.

  • issuer - (string) base URI of the authentication server. If no serviceConfiguration (below) is provided, issuer is a mandatory field, so that the configuration can be fetched from the issuer's OIDC discovery endpoint.
  • serviceConfiguration - (object) you may manually configure token exchange endpoints in cases where the issuer does not support the OIDC discovery protocol, or simply to avoid an additional round trip to fetch the configuration. If no issuer (above) is provided, the service configuration is mandatory.
    • authorizationEndpoint - (string) REQUIRED fully formed url to the OAuth authorization endpoint
    • tokenEndpoint - (string) REQUIRED fully formed url to the OAuth token exchange endpoint
    • revocationEndpoint - (string) fully formed url to the OAuth token revocation endpoint. If you want to be able to revoke a token and no issuer is specified, this field is mandatory.
    • registrationEndpoint - (string) fully formed url to your OAuth/OpenID Connect registration endpoint. Only necessary for servers that require client registration.
  • clientId - (string) REQUIRED your client id on the auth server
  • clientSecret - (string) client secret to pass to token exchange requests. :warning: Read more about client secrets
  • redirectUrl - (string) REQUIRED the url that links back to your app with the auth code
  • scopes - (array<string>) the scopes for your token, e.g. ['email', 'offline_access'].
  • additionalParameters - (object) additional parameters that will be passed in the authorization request. Must be string values! E.g. setting additionalParameters: { hello: 'world', foo: 'bar' } would add hello=world&foo=bar to the authorization request.
  • clientAuthMethod - (string) ANDROID Client Authentication Method. Can be either basic (default) for Basic Authentication or post for HTTP POST body Authentication
  • dangerouslyAllowInsecureHttpRequests - (boolean) ANDROID whether to allow requests over plain HTTP or with self-signed SSL certificates. :warning: Can be useful for testing against local server, should not be used in production. This setting has no effect on iOS; to enable insecure HTTP requests, add a NSExceptionAllowsInsecureHTTPLoads exception to your App Transport Security settings.
  • customHeaders - (object) ANDROID you can specify custom headers to pass during authorize request and/or token request.
    • authorize - ({ [key: string]: value }) headers to be passed during authorization request.
    • token - ({ [key: string]: value }) headers to be passed during token retrieval request.
    • register - ({ [key: string]: value }) headers to be passed during registration request.
  • useNonce - (boolean) IOS (default: true) optionally allows not sending the nonce parameter, to support non-compliant providers
  • usePKCE - (boolean) (default: true) optionally allows not sending the code_challenge parameter and skipping PKCE code verification, to support non-compliant providers.
  • skipCodeExchange - (boolean) (default: false) just return the authorization response, instead of automatically exchanging the authorization code. This is useful if this exchange needs to be done manually (not client-side)

result

This is the result from the auth server:

  • accessToken - (string) the access token
  • accessTokenExpirationDate - (string) the token expiration date
  • authorizeAdditionalParameters - (Object) additional url parameters from the authorizationEndpoint response.
  • tokenAdditionalParameters - (Object) additional url parameters from the tokenEndpoint response.
  • idToken - (string) the id token
  • refreshToken - (string) the refresh token
  • tokenType - (string) the token type, e.g. Bearer
  • scopes - ([string]) the scopes the user has agreed to be granted
  • authorizationCode - (string) the authorization code (only if skipCodeExchange=true)

refresh

This method will refresh the accessToken using the refreshToken. Some auth providers will also give you a new refreshToken

import { refresh } from 'react-native-app-auth';

const config = {
  issuer: '<YOUR_ISSUER_URL>',
  clientId: '<YOUR_CLIENT_ID>',
  redirectUrl: '<YOUR_REDIRECT_URL>',
  scopes: ['<YOUR_SCOPES_ARRAY>'],
};

const result = await refresh(config, {
  refreshToken: `<REFRESH_TOKEN>`,
});

revoke

This method will revoke a token. The tokenToRevoke can be either an accessToken or a refreshToken

import { revoke } from 'react-native-app-auth';

const config = {
  issuer: '<YOUR_ISSUER_URL>',
  clientId: '<YOUR_CLIENT_ID>',
  redirectUrl: '<YOUR_REDIRECT_URL>',
  scopes: ['<YOUR_SCOPES_ARRAY>'],
};

const result = await revoke(config, {
  tokenToRevoke: `<TOKEN_TO_REVOKE>`,
  includeBasicAuth: true,
  sendClientId: true,
});

register

This will perform dynamic client registration on the given provider. If the provider supports dynamic client registration, it will generate a clientId for you to use in subsequent calls to this library.

import { register } from 'react-native-app-auth';

const registerConfig = {
  issuer: '<YOUR_ISSUER_URL>',
  redirectUrls: ['<YOUR_REDIRECT_URL>', '<YOUR_OTHER_REDIRECT_URL>'],
};

const registerResult = await register(registerConfig);

registerConfig

  • issuer - (string) same as in authorization config
  • serviceConfiguration - (object) same as in authorization config
  • redirectUrls - (array<string>) REQUIRED specifies all of the redirect urls that your client will use for authentication
  • responseTypes - (array<string>) an array that specifies which OAuth 2.0 response types your client will use. The default value is ['code']
  • grantTypes - (array<string>) an array that specifies which OAuth 2.0 grant types your client will use. The default value is ['authorization_code']
  • subjectType - (string) requests a specific subject type for your client
  • tokenEndpointAuthMethod (string) specifies which clientAuthMethod your client will use for authentication. The default value is 'client_secret_basic'
  • additionalParameters - (object) additional parameters that will be passed in the registration request. Must be string values! E.g. setting additionalParameters: { hello: 'world', foo: 'bar' } would add hello=world&foo=bar to the authorization request.
  • dangerouslyAllowInsecureHttpRequests - (boolean) ANDROID same as in authorization config
  • customHeaders - (object) ANDROID same as in authorization config

registerResult

This is the result from the auth server

  • clientId - (string) the assigned client id
  • clientIdIssuedAt - (string) OPTIONAL date string of when the client id was issued
  • clientSecret - (string) OPTIONAL the assigned client secret
  • clientSecretExpiresAt - (string) date string of when the client secret expires, which will be provided if clientSecret is provided. If new Date(clientSecretExpiresAt).getTime() === 0, then the secret never expires
  • registrationClientUri - (string) OPTIONAL uri that can be used to perform subsequent operations on the registration
  • registrationAccessToken - (string) token that can be used at the endpoint given by registrationClientUri to perform subsequent operations on the registration. Will be provided if registrationClientUri is provided

Getting started

npm install react-native-app-auth --save

Setup

iOS Setup

To setup the iOS project, you need to perform three steps:

  1. Install native dependencies
  2. Register redirect URL scheme
  3. Define openURL callback in AppDelegate
Install native dependencies

This library depends on the native AppAuth-ios project. To keep the React Native library agnostic of your dependency management method, the native libraries are not distributed as part of the bridge.

AppAuth supports three options for dependency management.

  1. CocoaPods

    cd ios
    pod install
  2. Carthage

    With Carthage, add the following line to your Cartfile:

     github "openid/AppAuth-iOS" "master"

    Then run carthage update --platform iOS.

    Drag and drop AppAuth.framework from ios/Carthage/Build/iOS under Frameworks in Xcode.

    Add a copy files build step for AppAuth.framework: open Build Phases on Xcode, add a new "Copy Files" phase, choose "Frameworks" as destination, add AppAuth.framework and ensure "Code Sign on Copy" is checked.

  3. Static Library

    You can also use AppAuth-iOS as a static library. This requires linking the library and your project and including the headers. Suggested configuration:

    1. Create an XCode Workspace.
    2. Add AppAuth.xcodeproj to your Workspace.
    3. Include libAppAuth as a linked library for your target (in the "General -> Linked Framework and Libraries" section of your target).
    4. Add AppAuth-iOS/Source to your search paths of your target ("Build Settings -> "Header Search Paths").
Register redirect URL scheme

If you intend to support iOS 10 and older, you need to define the supported redirect URL schemes in your Info.plist as follows:

<key>CFBundleURLTypes</key>
<array>
  <dict>
    <key>CFBundleURLName</key>
    <string>com.your.app.identifier</string>
    <key>CFBundleURLSchemes</key>
    <array>
      <string>io.identityserver.demo</string>
    </array>
  </dict>
</array>
  • CFBundleURLName is any globally unique string. A common practice is to use your app identifier.
  • CFBundleURLSchemes is an array of URL schemes your app needs to handle. The scheme is the beginning of your OAuth Redirect URL, up to the scheme separator (:) character. E.g. if your redirect uri is com.myapp://oauth, then the url scheme will is com.myapp.
Define openURL callback in AppDelegate

You need to retain the auth session, in order to continue the authorization flow from the redirect. Follow these steps:

RNAppAuth will call on the given app's delegate via [UIApplication sharedApplication].delegate. Furthermore, RNAppAuth expects the delegate instance to conform to the protocol RNAppAuthAuthorizationFlowManager. Make AppDelegate conform to RNAppAuthAuthorizationFlowManager with the following changes to AppDelegate.h:

+ #import "RNAppAuthAuthorizationFlowManager.h"

- @interface AppDelegate : UIResponder <UIApplicationDelegate, RCTBridgeDelegate>
+ @interface AppDelegate : UIResponder <UIApplicationDelegate, RCTBridgeDelegate, RNAppAuthAuthorizationFlowManager>

+ @property(nonatomic, weak)id<RNAppAuthAuthorizationFlowManagerDelegate>authorizationFlowManagerDelegate;

Add the following code to AppDelegate.m (to support iOS 10 and below)

+ - (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString *, id> *) options {
+  return [self.authorizationFlowManagerDelegate resumeExternalUserAgentFlowWithURL:url];
+ }

If you want to support universal links, add the following to AppDelegate.m under continueUserActivity

+ if ([userActivity.activityType isEqualToString:NSUserActivityTypeBrowsingWeb]) {
+   if (self.authorizationFlowManagerDelegate) {
+     BOOL resumableAuth = [self.authorizationFlowManagerDelegate resumeExternalUserAgentFlowWithURL:userActivity.webpageURL];
+     if (resumableAuth) {
+       return YES;
+     }
+   }
+ }

Integration of the library with a Swift iOS project

The approach mentioned should work with Swift. In this case one should make AppDelegate conform to RNAppAuthAuthorizationFlowManager. Note that this is not tested/guaranteed by the maintainers.

Steps:

  1. swift-Bridging-Header.h should include a reference to #import "RNAppAuthAuthorizationFlowManager.h, like so:
#import <React/RCTBundleURLProvider.h>
#import <React/RCTRootView.h>
#import <React/RCTBridgeDelegate.h>
#import <React/RCTBridge.h>
#import "RNAppAuthAuthorizationFlowManager.h" // <-- Add this header
#if DEBUG
#import <FlipperKit/FlipperClient.h>
// etc...
  1. AppDelegate.swift should implement the RNAppAuthorizationFlowManager protocol and have a handler for url deep linking. The result should look something like this:
@UIApplicationMain
class AppDelegate: UIApplicationDelegate, RNAppAuthAuthorizationFlowManager { //<-- note the additional RNAppAuthAuthorizationFlowManager protocol
  public weak var authorizationFlowManagerDelegate: RNAppAuthAuthorizationFlowManagerDelegate? // <-- this property is required by the protocol
  //"open url" delegate function for managing deep linking needs to call the resumeExternalUserAgentFlowWithURL method
  func application(
      _ app: UIApplication,
      open url: URL,
      options: [UIApplicationOpenURLOptionsKey: Any] = [:]) -> Bool {
      return authorizationFlowManagerDelegate?.resumeExternalUserAgentFlowWithURL(with: url) ?? false
  }
}

Android Setup

Note: for RN >= 0.57, you will get a warning about compile being obsolete. To get rid of this warning, use patch-package to replace compile with implementation as in this PR - we're not deploying this right now, because it would break the build for RN < 57.

To setup the Android project, you need to add redirect scheme manifest placeholder:

To capture the authorization redirect, add the following property to the defaultConfig in android/app/build.gradle:

android {
  defaultConfig {
    manifestPlaceholders = [
      appAuthRedirectScheme: 'io.identityserver.demo'
    ]
  }
}

The scheme is the beginning of your OAuth Redirect URL, up to the scheme separator (:) character. E.g. if your redirect uri is com.myapp://oauth, then the url scheme will is com.myapp.

Usage

import { authorize } from 'react-native-app-auth';

// base config
const config = {
  issuer: '<YOUR_ISSUER_URL>',
  clientId: '<YOUR_CLIENT_ID>',
  redirectUrl: '<YOUR_REDIRECT_URL>',
  scopes: ['<YOUR_SCOPE_ARRAY>'],
};

// use the client to make the auth request and receive the authState
try {
  const result = await authorize(config);
  // result includes accessToken, accessTokenExpirationDate and refreshToken
} catch (error) {
  console.log(error);
}

Error messages

Values are in the code field of the rejected Error object.

  • OAuth Authorization error codes
  • OAuth Access Token error codes
  • OpendID Connect Registration error codes
  • service_configuration_fetch_error - could not fetch the service configuration
  • authentication_failed - user authentication failed
  • token_refresh_failed - could not exchange the refresh token for a new JWT
  • registration_failed - could not register
  • browser_not_found (Android only) - no suitable browser installed

Note about client secrets

Some authentication providers, including examples cited below, require you to provide a client secret. The authors of the AppAuth library

strongly recommend you avoid using static client secrets in your native applications whenever possible. Client secrets derived via a dynamic client registration are safe to use, but static client secrets can be easily extracted from your apps and allow others to impersonate your app and steal user data. If client secrets must be used by the OAuth2 provider you are integrating with, we strongly recommend performing the code exchange step on your backend, where the client secret can be kept hidden.

Having said this, in some cases using client secrets is unavoidable. In these cases, a clientSecret parameter can be provided to authorize/refresh calls when performing a token request.

Token Storage

Recommendations on secure token storage can be found here.

Maintenance Status

Active: Formidable is actively working on this project, and we expect to continue for work for the foreseeable future. Bug reports, feature requests and pull requests are welcome.