Passwordless Authentication on iOS with Touch ID (Objective-C)
A feature specific to iOS is the support for Touch ID, which allows users to authenticate with their fingerprint (biometric authentication).
During sign-up, the library will generate a key pair on the device, create a user in Auth0, and register the public key for the user:
The private key is stored in the keystore of the device. Each time a user initiates authentication with a valid fingerprint, Touch ID retrieves the private key from the keystore, creates a token, signs it with the private key and sends it to Auth0. Auth0 then returns an ID Token, the user profile and, optionally, a Refresh Token.
Using the Auth0 Lock
Lock is a widget that allows you to easily integrate Auth0's Passwordless Authentication into your iOS applications.
After installing and configuring Lock.iOS-OSX, you will be able to use Lock as follows.
Using your own UI
If you choose to build your own UI, you must install our TouchIDAuth library to handle the features specific to Touch ID.
Begin by signing up a user in a Database Connection:
Once the user has signed up, use the
idToken to register the public key for the user.
First, you will need a place to store an Auth0 API application with the token until you register the key, and a place to store the TouchID component:
Now implement the following method to perform TouchID authentication:
Then create and store the API application:
Now configure the TouchID Authentication component:
Then, to begin authentication, add this line: