Implementing Local Authentication

import * as LocalAuthentication from 'expo-local-authentication';

const hasHardware = await LocalAuthentication.hasHardwareAsync();
console.log("Has hardware: ", hasHardware);

import * as LocalAuthentication from 'expo-local-authentication';

const authResult = await LocalAuthentication.authenticateAsync({
  promptMessage: 'Authenticate to proceed',
  cancelLabel: 'Cancel',
});
console.log("Authentication result: ", authResult);

import * as LocalAuthentication from 'expo-local-authentication';

const checkBiometricSupport = async () => {
  const supported = await LocalAuthentication.hasHardwareAsync();
  console.log("Biometric hardware supported:", supported);

  const types = await LocalAuthentication.supportedAuthenticationTypesAsync();
  console.log("Supported authentication types:", types);
};

checkBiometricSupport();

import * as ExpoAuth from 'expo-auth';

const login = async () => {
  const credentials = {
    username: 'john_doe',
    password: 'secure123'
  };

  try {
    const response = await ExpoAuth.authenticate(credentials);
    console.log('Authentication successful:', response.authToken);
  } catch (error) {
    console.error('Authentication failed:', error.message);
  }
};

import * as LocalAuthentication from 'expo-local-authentication';

async function checkBiometrics() {
  const isEnrolled = await LocalAuthentication.isEnrolledAsync();
  console.log("Biometrics enrolled: ", isEnrolled);
}

checkBiometrics();

import * as LocalAuthentication from 'expo-local-authentication';

async function checkSpecificBiometrics() {
  const isFaceEnrolled = await LocalAuthentication.isEnrolledAsync("Face");
  const isFingerprintEnrolled = await LocalAuthentication.isEnrolledAsync("Fingerprint");
  console.log("Face enrolled: ", isFaceEnrolled);
  console.log("Fingerprint enrolled: ", isFingerprintEnrolled);
}

checkSpecificBiometrics();

const authConfig = {
  authType: "local",
  requireEmailVerification: true,
  passwordPolicy: "minLength:8;requireNumbers:true;",
  maxLoginAttempts: 5,
  lockoutDuration: 30
};

import * as AuthSession from 'expo-auth-session';

const handleAuthResult = async (result) => {
  if (result?.type === 'success') {
    const { params } = result;
    const accessToken = params.access_token;
    const refreshToken = params.refresh_token;

    // Store tokens securely
    await SecureStore.setItemAsync('access_token', accessToken);
    await SecureStore.setItemAsync('refresh_token', refreshToken);

    // Redirect to app screen
    navigation.replace('Home');
  } else if (result?.type === 'dismissed') {
    // User dismissed the auth session
    console.log('Authentication was dismissed');
  }
};

export default function AuthScreen() {
  const [request, response, promptAsync] = AuthSession.useAuthRequest(
    {
      clientId: 'your-client-id',
      redirectUri: AuthSession.makeRedirectUri(),
      scopes: ['read', 'write'],
    },
    AuthSession.authTypes.PKCE
  );

  return (
    <View style={styles.container}>
      <Button
        title="Login with OAuth"
        onPress={() => promptAsync()}
      />
    </View>
  );
}

import * as LocalAuthentication from 'expo-local-authentication';

const authenticateWithFaceID = async () => {
  const hasHardware = await LocalAuthentication.hasHardwareAsync();
  if (!hasHardware) {
    console.log("Face ID not supported");
    return;
  }

  const authResult = await LocalAuthentication.authenticateAsync({
    promptMessage: "Authenticate with Face ID",
    requireFaceID: true,
    fallback: "TouchID"
  });

  if (authResult.success) {
    console.log("Authentication successful");
  } else {
    console.log("Authentication failed");
  }
};

import * as LocalAuthentication from 'expo-local-authentication';

const authenticateWithTouchID = async () => {
  const hasHardware = await LocalAuthentication.hasHardwareAsync();
  if (hasHardware) {
    const authResult = await LocalAuthentication.authenticateAsync({
      promptMessage: 'Authenticate with your fingerprint',
      fallbackEnabled: true
    });
    
    if (authResult.success) {
      console.log('Authentication successful');
    } else {
      console.log('Authentication failed');
    }
  } else {
    console.log('Touch ID not supported');
  }
};

import * as LocalAuthentication from 'expo-local-authentication';

const authenticateWithFingerprint = async () => {
  const { success } = await LocalAuthentication.authenticateAsync({
    promptMessage: 'Authenticate with fingerprint',
    fallback: true,
  });

  if (success) {
    console.log('Authentication successful');
  } else {
    console.log('Authentication failed');
  }
};

import * as LocalAuthentication from 'expo-local-authentication';

const authenticateWithFallback = async () => {
  const hasHardware = await LocalAuthentication.hasHardwareAsync();
  const isEnrolled = await LocalAuthentication.isEnrolledAsync();

  if (hasHardware && isEnrolled) {
    const authResult = await LocalAuthentication.authenticateAsync({
      fallback: 'passcode'
    });
    if (authResult.success) {
      console.log("Authentication successful");
    } else {
      console.log("Authentication failed");
    }
  } else {
    console.log("No biometric hardware or enrollment");
  }
};

import * as LocalAuthentication from 'expo-local-authentication';

async function getBiometricType() {
  const { biometryType } = await LocalAuthentication.getBiometricTypesAsync();
  console.log("Biometric type:", biometryType);
}

getBiometricType();

import * as Authentication from 'expo-auth-session';

const handleAuthCancel = () => {
  // Reset authentication state
  setAuthState('idle');
  
  // Clear any temporary tokens or data
  clearAuthTokens();
  
  // Notify user of cancellation
  alert('Authentication was canceled');
};

// Example usage in a cancellation handler
const onCancel = () => {
  handleAuthCancel();
  // Optionally navigate back to previous screen
  navigation.goBack();
};