react-native-haapi-module

This a react-native Native Module that use the Hypermedia Authentication API of the Curity Identity Server. The module utilizes the iOS and Android SDK to perform attestation and communication with the API.

https://curity.io/product/authentication-service/authentication-api/

Getting started

$ npm install @curity/react-native-haapi-module --save

Configuration

Parameter Name | Platform | Required | Default | Description -------------------------- | -------- | -------- | ---------------------------- | ----------------------------------------------------------------------------------------------------- appRedirect | both | false | app:start | Redirect URI to use in OAuth requests. Needs to be registered in server config keyStoreAlias | android | false | haapi-react-native-android | Keystore alias for keys used in an authentication flow. Only used on Android configurationName | ios | false | HaapiModule | The name to use for the configuration on iOS. If you are in testing mode and switching environments, make sure that each environment sets a different name clientId | both | true | | The registered client_id baseUri | both | true | | Base URI of the server. Used for relative redirects. tokenEndpointUri | both | true | | URI of the token endpoint. authorizationEndpointUri | both | true | | URI of the authorize endpoint. revocationEndpointUri | both | true | | URI of the revocation endpoint. registrationEndpointUri | android | false | | URI of the registration endpoint. Required if fallback registration should be used. fallback_template_id | android | false | | Name of the template client to be used in fallback. Required if fallback registration should be used. registration_secret | android | false | | Name of the template client to be used in fallback. Required if fallback registration should be used. validateTlsCertificate | both | false | true | If the server TLS certificate should be validated. Set to false to accept self signed certificates. acrValues | both | false | "" | Space separated string to send in authorize request. scope | both | false | "" | Space separated string of scopes to request.

Usage

All functions of the module are async operations. The application may use events produced by the module to drive the authentication flow, or rely on reults return by promises.

Load

To use the module, first load the module with the desired configuration.

import {NativeModules} from "react-native";

const {HaapiModule} = NativeModules;

// Example configuration
const haapiConfiguration = {
    "appRedirect": "app:start",
    "keyStoreAlias": "haapi-react-native",
    "clientId": "react-dev-client",
    "baseUri": "https://login.example.com",
    "tokenEndpointUri": "https://login.example.com/oauth/token",
    "authorizationEndpointUri": "https://login.example.com/oauth/authorize",
    "revocationEndpointUri": "https://login.example.com/oauth/revoke",
    "scope": "openid profile",
    "registrationEndpointUri": "https://login.example.com/oauth/registration",
    "fallback_template_id": "react-native-fallback",
    "registration_secret": "my-good-secret"
    "validateTlsCertificate": true,
    "acrValues": ""
}

HaapiModule.load(HaapiConfiguration).catch(e => {
    console.error('Error in loading configuration', e);
});

export default HaapiModule;

load() man be called multiple times with different configuration, to be able to start authentication flows requesting different acr or scope.

Start

After the module has been loaded, the start() function may be called. start() will setup the communication with HAAPI, perform attestation, and then start emitting events for the application to react on. Receiving events will allow the application to know more about the contents of the current state than if it were to receive the raw HaapiResponse. The module will follow redirect responses automatically.

try {
    await HaapiModule.start();
} catch (e) {
    console.error(e);
}

To listen for the events produced:

const eventEmitter = new NativeEventEmitter(HaapiModule);
eventEmitter.addListener("EventName", () => {
    // Handle event
});

Navigate

To follow a link in a HAAPI response, the navigate(model) function can be used. model is an object conforming to Link

try {
    await HaapiModule.navigate(model);
} catch (e) {
    console.error(e);
}

Submit form

To submit a form in an action, use the submitForm(action, parameters), where action is the form to submit, and parameters is an object containing the field names and the values to fill the form.

try {
    await HaapiModule.submitForm(action, parameters);
} catch (e) {
    console.error(e);
}

Refresh Access Token

Refresh the access token using the refresh token. The application may listen to the events TokenResponse/TokenResponseError for the result of the refresh.

HaapiModule.refreshAccessToken(refreshToken);

Log out

Calling log out will revoke the tokens, and close the underlying managers to clear the state.

HaapiModule.logout().then(/* Remove tokens from state */);

Events

Event Name | Emitted when -------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- AuthenticationStep | An action is required by the user as part of authentication. See Authentication Step AuthenticationSelectorStep | An AuthenticationStep with the kind authenticator-selector is received. An authenticator selector screen should be be shown to the user. ContinueSameStep | A screen should be shown to the user, containing some information. The only required action by the user is to accept or in some cases cancel. Continue Same Step PollingStep | An authentication step that requires polling was received. May contain information for the user for how to proceed authentication out of band. Polling Step PollingStepResult | A poll result was received with the status PENDING. The application may show new information to the user and continue polling. StopPolling | A successful poll result was received. Application should stop polling, and the module will continue execution and may issue new events. TokenResponse | Authentication was successful, and the resulting token(s) was received. The payload of the event will contain accessToken, expiresIn and scope. May contain refreshToken and idToken TokenResponseError | Authentication was successful, but the token request returned an error. SessionTimedOut | The authentication process took too long, and timed out. The user will have to start over using start() method again. IncorrectCredentials | The user enter wrong credentials in an AuthenticationStep. Show an error to the user and allow them to try again. Invalid Input Problem ProblemRepresentation | The server returned an unexpected problem. Problem HaapiError | An unexpected problem happened. Event will have members error and error_description

Example implementation

See https://github.com/curityio/react-native-haapi-example for example implementation in javascript which is mostly driven by events.

Development

To deploy changes in the modules to an application without publishing a new package, a file system dependency may be used.

• Pack your module with: npm pack. This will provide a .tgz file containing the module.
• Then in your application, depend on your file using npm install $path_to_file/react-native-haapi-module/curity-react-native-haapi-module-0.4.2.tgz --save

Known limitations

• Registration steps no yet supported
• External Browser flow not yet supported
• Webauthn/Passkeys not yet supported