app/com.mutkuensert.androidsignatureexample.signaturehelper.biometric/BiometricSignatureHandler

BiometricSignatureHandler

class BiometricSignatureHandler(alias: String)

BiometricSignatureHandler manages the creation, deletion, and use of hardware-backed key pairs with biometric authentication. This class utilizes SignatureHelper to interact with the Android KeyStore.

Parameters

alias

The alias of the key entry in the KeyStore.

Constructors

BiometricSignatureHandler

constructor(alias: String)

Functions

authenticateAndSignData

fun authenticateAndSignData(data: String, activity: FragmentActivity, onAuthenticationSucceeded: (SignedData?) -> Unit)

Authenticates the user via biometric authentication and signs the given data. Calls the provided callback function with the signed data upon successful authentication.

deleteKeyPair

fun deleteKeyPair(): Boolean

exists

fun exists(): Boolean?

generateHardwareBackedKeyPair

fun generateHardwareBackedKeyPair(activity: FragmentActivity): KeyPair?

If strong biometric is available then returns SignatureHelper.generateHardwareBackedKeyPair otherwise returns null.

getPublicKeyBase64Encoded

fun getPublicKeyBase64Encoded(keyPair: KeyPair): String

verifyData

fun verifyData(publicKey: String, data: String, signature: String): Boolean