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-rw-r--r--app/src/main/kotlin/com/pitchedapps/frost/StartActivity.kt3
-rw-r--r--app/src/main/kotlin/com/pitchedapps/frost/activities/WebOverlayActivity.kt3
-rw-r--r--app/src/main/kotlin/com/pitchedapps/frost/utils/BiometricUtils.kt89
3 files changed, 95 insertions, 0 deletions
diff --git a/app/src/main/kotlin/com/pitchedapps/frost/StartActivity.kt b/app/src/main/kotlin/com/pitchedapps/frost/StartActivity.kt
index 18ae4b0b..cf8acdd3 100644
--- a/app/src/main/kotlin/com/pitchedapps/frost/StartActivity.kt
+++ b/app/src/main/kotlin/com/pitchedapps/frost/StartActivity.kt
@@ -42,6 +42,7 @@ import com.pitchedapps.frost.db.save
import com.pitchedapps.frost.db.saveTabs
import com.pitchedapps.frost.db.selectAll
import com.pitchedapps.frost.facebook.FbCookie
+import com.pitchedapps.frost.utils.BiometricUtils
import com.pitchedapps.frost.utils.EXTRA_COOKIES
import com.pitchedapps.frost.utils.L
import com.pitchedapps.frost.utils.Prefs
@@ -79,6 +80,7 @@ class StartActivity : KauBaseActivity() {
}
launch {
+ val authDefer = BiometricUtils.authenticate(this@StartActivity)
try {
migrate()
FbCookie.switchBackUser()
@@ -86,6 +88,7 @@ class StartActivity : KauBaseActivity() {
L.i { "Cookies loaded at time ${System.currentTimeMillis()}" }
L._d { "Cookies: ${cookies.joinToString("\t", transform = CookieEntity::toSensitiveString)}" }
loadAssets()
+ authDefer.await()
when {
cookies.isEmpty() -> launchNewTask<LoginActivity>()
// Has cookies but no selected account
diff --git a/app/src/main/kotlin/com/pitchedapps/frost/activities/WebOverlayActivity.kt b/app/src/main/kotlin/com/pitchedapps/frost/activities/WebOverlayActivity.kt
index f3226e2f..ec4ff9dd 100644
--- a/app/src/main/kotlin/com/pitchedapps/frost/activities/WebOverlayActivity.kt
+++ b/app/src/main/kotlin/com/pitchedapps/frost/activities/WebOverlayActivity.kt
@@ -64,6 +64,7 @@ import com.pitchedapps.frost.kotlin.subscribeDuringJob
import com.pitchedapps.frost.services.FrostRunnable
import com.pitchedapps.frost.utils.ARG_URL
import com.pitchedapps.frost.utils.ARG_USER_ID
+import com.pitchedapps.frost.utils.BiometricUtils
import com.pitchedapps.frost.utils.L
import com.pitchedapps.frost.utils.Prefs
import com.pitchedapps.frost.utils.Showcase
@@ -214,8 +215,10 @@ open class WebOverlayActivityBase(private val forceDesktopAgent: Boolean) : Base
userAgentString = USER_AGENT_DESKTOP
Prefs.prevId = Prefs.userId
launch {
+ val authDefer = BiometricUtils.authenticate(this@WebOverlayActivityBase)
if (userId != Prefs.userId)
FbCookie.switchUser(userId)
+ authDefer.await()
reloadBase(true)
if (Showcase.firstWebOverlay) {
coordinator.frostSnackbar(R.string.web_overlay_swipe_hint) {
diff --git a/app/src/main/kotlin/com/pitchedapps/frost/utils/BiometricUtils.kt b/app/src/main/kotlin/com/pitchedapps/frost/utils/BiometricUtils.kt
new file mode 100644
index 00000000..476e490d
--- /dev/null
+++ b/app/src/main/kotlin/com/pitchedapps/frost/utils/BiometricUtils.kt
@@ -0,0 +1,89 @@
+package com.pitchedapps.frost.utils
+
+import android.content.Context
+import android.hardware.fingerprint.FingerprintManager
+import android.os.Build
+import androidx.biometric.BiometricPrompt
+import androidx.fragment.app.FragmentActivity
+import ca.allanwang.kau.utils.string
+import com.pitchedapps.frost.R
+import kotlinx.coroutines.CompletableDeferred
+import java.util.concurrent.Executor
+import java.util.concurrent.ExecutorService
+import java.util.concurrent.Executors
+
+typealias BiometricDeferred = CompletableDeferred<BiometricPrompt.CryptoObject?>
+
+/**
+ * Container for [BiometricPrompt]
+ * Inspired by coroutine's CommonPool
+ */
+object BiometricUtils {
+
+ private val executor: Executor
+ get() = pool ?: getOrCreatePoolSync()
+
+ @Volatile
+ private var pool: ExecutorService? = null
+
+ /**
+ * Checks if biometric authentication is possible
+ * Currently, this means checking for enrolled fingerprints
+ */
+ @Suppress("DEPRECATION")
+ fun isSupported(context: Context): Boolean {
+ if (Build.VERSION.SDK_INT < Build.VERSION_CODES.M) return false
+ val fingerprintManager = context.getSystemService(FingerprintManager::class.java) ?: return false
+ return fingerprintManager.isHardwareDetected && fingerprintManager.hasEnrolledFingerprints()
+ }
+
+ private fun getOrCreatePoolSync(): Executor =
+ pool ?: Executors.newSingleThreadExecutor().also { pool = it }
+
+ private fun shouldPrompt(context: Context): Boolean {
+ return true
+ }
+
+ fun authenticate(activity: FragmentActivity): BiometricDeferred {
+ val deferred: BiometricDeferred = CompletableDeferred()
+ if (!shouldPrompt(activity)) {
+ deferred.complete(null)
+ return deferred
+ }
+ val info = BiometricPrompt.PromptInfo.Builder()
+ .setTitle(activity.string(R.string.biometrics_prompt_title))
+ .setNegativeButtonText(activity.string(R.string.kau_cancel))
+ .build()
+ BiometricPrompt(activity, executor, Callback(activity, deferred)).authenticate(info)
+ return deferred
+ }
+
+ private class Callback(val activity: FragmentActivity, val deferred: BiometricDeferred) :
+ BiometricPrompt.AuthenticationCallback() {
+ override fun onAuthenticationError(errorCode: Int, errString: CharSequence) {
+ deferred.cancel()
+ activity.finish()
+ }
+
+ override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
+ deferred.complete(result.cryptoObject)
+ }
+
+ override fun onAuthenticationFailed() {
+ deferred.cancel()
+ activity.finish()
+ }
+ }
+
+ /**
+ * For completeness we provide a shutdown function.
+ * In practice, we initialize the executor only when it is first used,
+ * and keep it alive throughout the app lifecycle, as it will be used an arbitrary number of times,
+ * with unknown frequency
+ */
+ @Synchronized
+ fun shutdown() {
+ pool?.shutdown()
+ pool = null
+ }
+} \ No newline at end of file