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Implemented biometric authentication on iOS (at least i hope it works, cannot test it)

This commit is contained in:
dankito 2024-09-24 05:55:47 +02:00
parent a47f580594
commit 0a0b93f9c8
4 changed files with 23 additions and 6 deletions
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4
composeApp/src/commonMain/kotlin/net/codinux/banking/ui/service/AuthenticationService.kt
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@ -23,7 +23,7 @@ fun AuthenticationService.safelyAuthenticateWithBiometrics(authenticationResult:
try {
this.authenticateWithBiometrics(authenticationResult)
} catch (e: Throwable) {
Log.error(e) { "Could not authenticate with Biometrics" }
DI.uiState.applicationErrorOccurred(ErroneousAction.BiometricAuthentication, "Beim Login mit Fingerabdruck / Gesichtsscan ist etwas fehlgeschlagen, was nicht fehlschlagen sollte. Die folgende Fehlermeldung wird Ihnen vermutlich nichts sagen. Am besten informieren Sie die Entwickler (die faulen Säcke), z. B. mit einem Screenshot dieser Fehlermeldung, damit diese sich darum kümmern.", e)
DI.bankingService.showAndLogError(ErroneousAction.BiometricAuthentication, "Could not authenticate with Biometrics", "Beim Login mit Fingerabdruck / Gesichtsscan ist etwas fehlgeschlagen, was nicht fehlschlagen sollte. Die folgende Fehlermeldung wird Ihnen vermutlich nichts sagen. Am besten informieren Sie die Entwickler (die faulen Säcke), z. B. mit einem Screenshot dieser Fehlermeldung, damit diese sich darum kümmern.", e)
authenticationResult(AuthenticationResult(false))
}
}

2
composeApp/src/commonMain/kotlin/net/codinux/banking/ui/service/BankingService.kt
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@ -427,7 +427,7 @@ class BankingService(
}
}
private fun showAndLogError(action: ErroneousAction, logMessage: String, messageToShowToUser: String? = null, exception: Throwable? = null) {
fun showAndLogError(action: ErroneousAction, logMessage: String, messageToShowToUser: String? = null, exception: Throwable? = null) {
log.error(exception) { logMessage }
uiState.applicationErrorOccurred(action, messageToShowToUser, exception)

19
composeApp/src/iosMain/kotlin/net/codinux/banking/ui/service/AuthenticationService.ios.kt
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@ -4,12 +4,12 @@ import kotlinx.cinterop.ExperimentalForeignApi
import kotlinx.cinterop.memScoped
import kotlinx.cinterop.refTo
import net.codinux.banking.ui.model.AuthenticationResult
import platform.CoreCrypto.CCCalibratePBKDF
import platform.CoreCrypto.CCKeyDerivationPBKDF
import platform.CoreCrypto.CC_SHA512
import platform.CoreCrypto.CC_SHA512_DIGEST_LENGTH
import platform.CoreCrypto.kCCPBKDF2
import platform.CoreCrypto.kCCPRFHmacAlgSHA256
import platform.LocalAuthentication.LAContext
import platform.Security.SecRandomCopyBytes
import platform.Security.kSecRandomDefault
@ -35,10 +35,23 @@ actual object AuthenticationService {
}
actual val supportsBiometricAuthentication = false // TODO
actual val supportsBiometricAuthentication: Boolean by lazy {
try {
val localAuthenticationContext = LAContext()
localAuthenticationContext.canEvaluatePolicy(platform.LocalAuthentication.LAPolicyDeviceOwnerAuthenticationWithBiometrics, null)
} catch (e: Throwable) {
false
}
}
actual fun authenticateWithBiometrics(authenticationResult: (AuthenticationResult) -> Unit) {
authenticationResult(AuthenticationResult(false, "Biometrics is not implemented yet"))
val context = LAContext()
val reason = "Authentifizieren Sie sich bitte um die App zu entsperren"
context.evaluatePolicy(platform.LocalAuthentication.LAPolicyDeviceOwnerAuthenticationWithBiometrics, reason) { success, error ->
authenticationResult(AuthenticationResult(success, error?.localizedDescription))
}
}

4
iosApp/iosApp/Info.plist
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@ -22,6 +22,10 @@
<string>$(CURRENT_PROJECT_VERSION)</string>
<key>LSRequiresIPhoneOS</key>
<true/>
<key>NSCameraUsageDescription</key>
<string>Used to scan QR codes to initiate money transfer</string>
<key>NSFaceIDUsageDescription</key>
<string>On user demand we use FaceID to unlock the app</string>
<key>UIApplicationSceneManifest</key>
<dict>
<key>UIApplicationSupportsMultipleScenes</key>