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Capacitor Native Biometric

Capgo - Instant updates for capacitor

Use biometrics confirm device owner presence or authenticate users. A couple of methods are provided to handle user credentials. These are securely stored using Keychain (iOS) and Keystore (Android).

Installation (Only supports Capacitor 6)

  • npm i @capgo/capacitor-native-biometric

Usage

import { NativeBiometric, BiometryType } from "@capgo/capacitor-native-biometric";

async performBiometricVerification(){
  const result = await NativeBiometric.isAvailable();

  if(!result.isAvailable) return;

  const isFaceID = result.biometryType == BiometryType.FACE_ID;

  const verified = await NativeBiometric.verifyIdentity({
    reason: "For easy log in",
    title: "Log in",
    subtitle: "Maybe add subtitle here?",
    description: "Maybe a description too?",
  })
    .then(() => true)
    .catch(() => false);

  if(!verified) return;

  const credentials = await NativeBiometric.getCredentials({
    server: "www.example.com",
  });
}

// Save user's credentials
NativeBiometric.setCredentials({
  username: "username",
  password: "password",
  server: "www.example.com",
}).then();

// Delete user's credentials
NativeBiometric.deleteCredentials({
  server: "www.example.com",
}).then();

Biometric Auth Errors

This is a plugin specific list of error codes that can be thrown on verifyIdentity failure, or set as a part of isAvailable. It consolidates Android and iOS specific Authentication Error codes into one combined error list.

Code Description Platform
0 Unknown Error Android, iOS
1 Biometrics Unavailable Android, iOS
2 User Lockout Android, iOS
3 Biometrics Not Enrolled Android, iOS
4 User Temporary Lockout Android (Lockout for 30sec)
10 Authentication Failed Android, iOS
11 App Cancel iOS
12 Invalid Context iOS
13 Not Interactive iOS
14 Passcode Not Set Android, iOS
15 System Cancel Android, iOS
16 User Cancel Android, iOS
17 User Fallback Android, iOS

isAvailable(...)

isAvailable(options?: IsAvailableOptions | undefined) => any

Checks if biometric authentication hardware is available.

Param Type
options IsAvailableOptions

Returns: any

Since: 1.0.0

verifyIdentity(...)

verifyIdentity(options?: BiometricOptions | undefined) => any

Prompts the user to authenticate with biometrics.

Param Type
options BiometricOptions

Returns: any

Since: 1.0.0

getCredentials(...)

getCredentials(options: GetCredentialOptions) => any

Gets the stored credentials for a given server.

Param Type
options GetCredentialOptions

Returns: any

Since: 1.0.0

setCredentials(...)

setCredentials(options: SetCredentialOptions) => any

Stores the given credentials for a given server.

Param Type
options SetCredentialOptions

Returns: any

Since: 1.0.0

deleteCredentials(...)

deleteCredentials(options: DeleteCredentialOptions) => any

Deletes the stored credentials for a given server.

Param Type
options DeleteCredentialOptions

Returns: any

Since: 1.0.0

Interfaces

IsAvailableOptions

Prop Type Description
useFallback boolean Specifies if should fallback to passcode authentication if biometric authentication is not available.

AvailableResult

Prop Type
isAvailable boolean
biometryType BiometryType
errorCode number

BiometricOptions

Prop Type Description Default
reason string
title string
subtitle string
description string
negativeButtonText string
useFallback boolean Specifies if should fallback to passcode authentication if biometric authentication fails.
fallbackTitle string Only for iOS. Set the text for the fallback button in the authentication dialog. If this property is not specified, the default text is set by the system.
maxAttempts number Only for Android. Set a maximum number of attempts for biometric authentication. The maximum allowed by android is 5. 1

GetCredentialOptions

Prop Type
server string

Credentials

Prop Type
username string
password string

SetCredentialOptions

Prop Type
username string
password string
server string

DeleteCredentialOptions

Prop Type
server string

Enums

BiometryType

Members Value
NONE 0
TOUCH_ID 1
FACE_ID 2
FINGERPRINT 3
FACE_AUTHENTICATION 4
IRIS_AUTHENTICATION 5
MULTIPLE 6
## Face ID (iOS)

To use FaceID Make sure to provide a value for NSFaceIDUsageDescription, otherwise your app may crash on iOS devices with FaceID.

This value is just the reason for using FaceID. You can add something like the following example to App/info.plist:

<key>NSFaceIDUsageDescription</key>
<string>For an easier and faster log in.</string>

Biometric (Android)

To use android's BiometricPrompt api you must add the following permission to your AndroidManifest.xml:

<uses-permission android:name="android.permission.USE_BIOMETRIC">

And register the plugin by adding it to you MainActivity's onCreate (Not needed for Capacitor 3):

import ee.forgr.biometric.NativeBiometric;

public class MainActivity extends BridgeActivity {
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    // Initializes the Bridge
    this.init(savedInstanceState, new ArrayList<Class<? extends Plugin>>() {{
      // Additional plugins you've installed go here
      // Ex: add(TotallyAwesomePlugin.class);
      add(NativeBiometric.class);
    }});
  }
}

Contributors

Jonthia QliQ.dev Brian Weasner Mohamed Diarra

Want to Contribute?

Learn about contributing HERE

Notes

Hasn't been tested on Android API level 22 or lower.