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implement authentication screen on Android and iOS
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,2 @@ | ||
| This version brings new features to app: | ||
| - manually reorder items with drag & drop gesture when sorting is disabled | ||
| - require user authentication if accessible |
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155 changes: 155 additions & 0 deletions
155
shared/src/androidMain/kotlin/ml/dev/kotlin/openotp/util/BiometryUtil.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,155 @@ | ||
| package ml.dev.kotlin.openotp.util | ||
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|
||
| import android.annotation.SuppressLint | ||
| import android.content.Context | ||
| import androidx.biometric.BiometricManager | ||
| import androidx.biometric.BiometricManager.Authenticators.BIOMETRIC_WEAK | ||
| import androidx.biometric.BiometricPrompt | ||
| import androidx.compose.runtime.Composable | ||
| import androidx.compose.runtime.LaunchedEffect | ||
| import androidx.compose.ui.platform.LocalContext | ||
| import androidx.compose.ui.platform.LocalLifecycleOwner | ||
| import androidx.core.content.ContextCompat | ||
| import androidx.fragment.app.Fragment | ||
| import androidx.fragment.app.FragmentActivity | ||
| import androidx.fragment.app.FragmentManager | ||
| import androidx.lifecycle.Lifecycle | ||
| import androidx.lifecycle.LifecycleObserver | ||
| import androidx.lifecycle.LifecycleOwner | ||
| import androidx.lifecycle.OnLifecycleEvent | ||
| import java.util.concurrent.Executor | ||
| import kotlin.coroutines.suspendCoroutine | ||
|
|
||
| actual class BiometryAuthenticator( | ||
| private val applicationContext: Context, | ||
| ) { | ||
| private var fragmentManager: FragmentManager? = null | ||
|
|
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| fun bind(lifecycle: Lifecycle, fragmentManager: FragmentManager) { | ||
| this.fragmentManager = fragmentManager | ||
|
|
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| val observer = object : LifecycleObserver { | ||
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| @OnLifecycleEvent(Lifecycle.Event.ON_DESTROY) | ||
| fun onDestroyed(source: LifecycleOwner) { | ||
| this@BiometryAuthenticator.fragmentManager = null | ||
| source.lifecycle.removeObserver(this) | ||
| } | ||
| } | ||
| lifecycle.addObserver(observer) | ||
| } | ||
|
|
||
| actual suspend fun checkBiometryAuthentication( | ||
| requestTitle: String, | ||
| requestReason: String, | ||
| ): Boolean { | ||
| val resolverFragment: ResolverFragment = getResolverFragment() | ||
|
|
||
| return suspendCoroutine { continuation -> | ||
| var resumed = false | ||
| resolverFragment.showBiometricPrompt( | ||
| requestTitle = requestTitle, | ||
| requestReason = requestReason, | ||
| ) { | ||
| if (!resumed) { | ||
| continuation.resumeWith(it) | ||
| resumed = true | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
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| actual fun isBiometricAvailable(): Boolean { | ||
| val manager: BiometricManager = BiometricManager.from(applicationContext) | ||
| return manager.canAuthenticate(BIOMETRIC_WEAK) == BiometricManager.BIOMETRIC_SUCCESS | ||
| } | ||
|
|
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| private fun getResolverFragment(): ResolverFragment { | ||
| val fragmentManager = fragmentManager | ||
| ?: error("can't check biometry without active window") | ||
|
|
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| val currentFragment = fragmentManager | ||
| .findFragmentByTag(BIOMETRY_RESOLVER_FRAGMENT_TAG) | ||
|
|
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| return if (currentFragment != null) { | ||
| currentFragment as ResolverFragment | ||
| } else { | ||
| ResolverFragment().apply { | ||
| fragmentManager | ||
| .beginTransaction() | ||
| .add(this, BIOMETRY_RESOLVER_FRAGMENT_TAG) | ||
| .commitNow() | ||
| } | ||
| } | ||
| } | ||
|
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| class ResolverFragment : Fragment() { | ||
| private lateinit var executor: Executor | ||
| private lateinit var biometricPrompt: BiometricPrompt | ||
| private lateinit var promptInfo: BiometricPrompt.PromptInfo | ||
|
|
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| init { | ||
| retainInstance = true | ||
| } | ||
|
|
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| fun showBiometricPrompt( | ||
| requestTitle: String, | ||
| requestReason: String, | ||
| callback: (Result<Boolean>) -> Unit, | ||
| ) { | ||
| val context = requireContext() | ||
|
|
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| executor = ContextCompat.getMainExecutor(context) | ||
|
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| biometricPrompt = BiometricPrompt(this, executor, | ||
| object : BiometricPrompt.AuthenticationCallback() { | ||
| @SuppressLint("RestrictedApi") | ||
| override fun onAuthenticationError( | ||
| errorCode: Int, | ||
| errString: CharSequence, | ||
| ) { | ||
| super.onAuthenticationError(errorCode, errString) | ||
| if (errorCode == BiometricPrompt.ERROR_NEGATIVE_BUTTON || | ||
| errorCode == BiometricPrompt.ERROR_USER_CANCELED | ||
| ) { | ||
| callback.invoke(Result.success(false)) | ||
| } else { | ||
| callback.invoke(Result.failure(Exception(errString.toString()))) | ||
| } | ||
| } | ||
|
|
||
| override fun onAuthenticationSucceeded( | ||
| result: BiometricPrompt.AuthenticationResult, | ||
| ) { | ||
| super.onAuthenticationSucceeded(result) | ||
| callback.invoke(Result.success(true)) | ||
| } | ||
| } | ||
| ) | ||
|
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| promptInfo = BiometricPrompt.PromptInfo.Builder() | ||
| .setTitle(requestTitle) | ||
| .setSubtitle(requestReason) | ||
| .setDeviceCredentialAllowed(true) | ||
| .build() | ||
|
|
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| biometricPrompt.authenticate(promptInfo) | ||
| } | ||
| } | ||
|
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| companion object { | ||
| private const val BIOMETRY_RESOLVER_FRAGMENT_TAG = "BiometryControllerResolver" | ||
| } | ||
| } | ||
|
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| @Composable | ||
| actual fun BindBiometryAuthenticatorEffect(biometryAuthenticator: BiometryAuthenticator) { | ||
| val lifecycleOwner = LocalLifecycleOwner.current | ||
| val context = LocalContext.current | ||
|
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| LaunchedEffect(biometryAuthenticator, lifecycleOwner, context) { | ||
| val fragmentManager = (context as FragmentActivity).supportFragmentManager | ||
| biometryAuthenticator.bind(lifecycleOwner.lifecycle, fragmentManager) | ||
| } | ||
| } | ||
|
|
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