noahmwolfe / touchidlogin

Xamarin.Forms mobile app - Login Page that uses TouchID to authenticate the user. In the event that touchID fails/is not enabled, a user can put in their username or password instead. Based off of JummyPun610's original XamarinTouchID Project.

XamarinTouchID

Screenshots for Android:

Screenshots for iOS:

Example for using Fingerprint authentication in Xamarin Android and Xamarin iOS

Using Rg.Plugin.Popup for Android custom popup screen

https://github.com/rotorgames/Rg.Plugins.Popup

This sample is assuming device already have an valid touchID.

Here is the setup.

Xamarin Android and Form project

1. Install AiForm.Effect

https://github.com/muak/AiForms.Effects

Xamarin iOS project

1. Install dannycabrera/Get-iOS-Model

https://github.com/dannycabrera/Get-iOS-Model

2. Create interface for dependency service in PCL project. Please refer to the sample.

Android:

1. Add permission in manifest.xml

	<uses-permission android:name="android.permission.USE_FINGERPRINT" />

2. Create Class TouchIDAuthenticationAndroid.cs, CryptoObjectHelper.cs and AuthenticationCallBack.cs

iOS:

1. Create Class TouchIDAuthenticationIOS.cs

To use it:

1. Check the device is able to do the fingerprint authentication

bool canFingerprint = DependencyService.Get<Interface.TouchIDAuthentication>().IsFingerprintAuthenticationPossible();

2. Authenticate

DependencyService.Get<Interface.TouchIDAuthentication>().Authenticate(actionIfSuccess, actionIfFail);