To authenticate a user in Firebase while working with React Native and Expo using SAML, follow these steps:
expo-auth-session
and react-native-app-auth
packages in your project.App.js
file to include the following code:import React, { useState } from 'react';
import { Button, StyleSheet, Text, View } from 'react-native';
import * as AppAuth from 'expo-app-auth';
import * as WebBrowser from 'expo-web-browser';
import * as firebase from 'firebase';
const config = {
issuer: '<SAML_PROVIDER_ISSUER>',
scopes: ['openid', 'profile', 'email'],
clientId: '<SAML_CLIENT_ID>',
redirectUrl: AppAuth.OAuthRedirect + '<SAML_CLIENT_ID>',
additionalParameters: {},
};
firebase.initializeApp({
apiKey: '<API_KEY>',
authDomain: '<AUTH_DOMAIN>',
projectId: '<PROJECT_ID>',
});
export default function App() {
const [user, setUser] = useState(null);
const login = async () => {
try {
const authResult = await AppAuth.authAsync(config);
const { idToken } = authResult.params;
const credential = firebase.auth.SAMLAuthProvider.credential(idToken);
const res = await firebase.auth().signInWithCredential(credential);
setUser(res.user);
} catch (e) {
console.log('Error:', e.message);
}
};
const logout = async () => {
try {
await firebase.auth().signOut();
setUser(null);
} catch (e) {
console.log('Error:', e.message);
}
};
return (
<View style={styles.container}>
<Text style={styles.title}>Firebase Authentication</Text>
{user ? (
<>
<Text style={styles.text}>Welcome, {user.email}!</Text>
<Button title="Logout" onPress={logout} />
</>
) : (
<>
<Text style={styles.text}>Please sign in</Text>
<Button title="Login with SAML" onPress={login} />
</>
)}
</View>
);
}
const styles = StyleSheet.create({
container: {
flex: 1,
backgroundColor: '#fff',
alignItems: 'center',
justifyContent: 'center',
},
title: {
fontWeight: 'bold',
fontSize: 20,
marginBottom: 20,
},
text: {
fontSize: 16,
marginBottom: 20,
},
});
<SAML_PROVIDER_ISSUER>
, <SAML_CLIENT_ID>
, <API_KEY>
, <AUTH_DOMAIN>
, and <PROJECT_ID>
) with your own values.Note: Make sure to enable SAML login in your Firebase project's authentication settings.
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Asked: 2022-10-02 11:00:00 +0000
Seen: 9 times
Last updated: Mar 18 '23
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