suBiometric: remove biometric

use device credential to support more devices and second user

app/build.gradle.kts

@@ -108,7 +108,6 @@ dependencies {
     implementation("androidx.navigation:navigation-fragment-ktx:${vNav}")
     implementation("androidx.navigation:navigation-ui-ktx:${vNav}")
 
-    implementation("androidx.biometric:biometric:1.1.0")
     implementation("androidx.constraintlayout:constraintlayout:2.1.4")
     implementation("androidx.swiperefreshlayout:swiperefreshlayout:1.1.0")
     implementation("androidx.appcompat:appcompat:1.6.1")

app/src/main/java/com/topjohnwu/magisk/core/utils/BiometricHelper.kt

@@ -1,53 +1,59 @@
 package com.topjohnwu.magisk.core.utils
 
+import android.app.Activity
+import android.app.KeyguardManager
 import android.content.Context
-import androidx.biometric.BiometricManager
-import androidx.biometric.BiometricManager.Authenticators
-import androidx.biometric.BiometricPrompt
-import androidx.core.content.ContextCompat
+import android.content.Intent
+import androidx.fragment.app.Fragment
 import androidx.fragment.app.FragmentActivity
-import com.topjohnwu.magisk.R
 import com.topjohnwu.magisk.core.Config
 
 class BiometricHelper(context: Context) {
 
-    private val mgr = BiometricManager.from(context)
+    private val mgr = context.getSystemService(KeyguardManager::class.java)
 
-    val isSupported get() = when (mgr.canAuthenticate(Authenticators.BIOMETRIC_WEAK)) {
-        BiometricManager.BIOMETRIC_SUCCESS -> true
-        else -> false
-    }
+    val isSupported get() = mgr.isDeviceSecure
 
     val isEnabled get() = isSupported && Config.suBiometric
 
     fun authenticate(
             activity: FragmentActivity,
             onError: () -> Unit = {},
-        onSuccess: () -> Unit): BiometricPrompt {
-        val prompt = BiometricPrompt(activity,
-            ContextCompat.getMainExecutor(activity),
-            object : BiometricPrompt.AuthenticationCallback() {
-                override fun onAuthenticationError(errorCode: Int, errString: CharSequence) {
-                    onError()
+            onSuccess: () -> Unit) {
+        val tag = BiometricFragment::class.java.name
+        val intent = mgr.createConfirmDeviceCredentialIntent(null, null)
+        val fragmentManager = activity.supportFragmentManager
+        var fragment = fragmentManager.findFragmentByTag(tag) as BiometricFragment?
+        if (fragment == null) {
+            fragment = BiometricFragment()
+            fragmentManager.beginTransaction()
+                    .add(0, fragment, tag)
+                    .commitNow()
+        }
+        fragment.start(intent, onError, onSuccess)
     }
 
-                override fun onAuthenticationFailed() {
-                    onError()
-                }
-
-                override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
+    class BiometricFragment : Fragment() {
+        private val code = 1
+        private var onError: () -> Unit = {}
+        private var onSuccess: () -> Unit = {}
+        override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
+            if (requestCode == code) {
+                    if (resultCode == Activity.RESULT_OK) {
                         onSuccess()
+                    } else {
+                        onError()
                     }
+                    onError = {}
+                    onSuccess = {}
             }
-        )
-        val info = BiometricPrompt.PromptInfo.Builder()
-            .setConfirmationRequired(true)
-            .setAllowedAuthenticators(Authenticators.BIOMETRIC_WEAK)
-            .setTitle(activity.getString(R.string.authenticate))
-            .setNegativeButtonText(activity.getString(android.R.string.cancel))
-            .build()
-        prompt.authenticate(info)
-        return prompt
         }
 
+        fun start(intent: Intent, onError: () -> Unit, onSuccess: () -> Unit) {
+            this.onError = onError
+            this.onSuccess = onSuccess
+            intent.addFlags(Intent.FLAG_ACTIVITY_MULTIPLE_TASK or Intent.FLAG_ACTIVITY_NEW_DOCUMENT)
+            startActivityForResult(intent, code)
+        }
+    }
 }

stub/src/main/AndroidManifest.xml

@@ -3,9 +3,9 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:tools="http://schemas.android.com/tools">
 
-    <uses-permission android:name="android.permission.USE_BIOMETRIC" />
-    <uses-permission android:name="android.permission.USE_FINGERPRINT" />
-    <uses-permission android:name="com.android.launcher.permission.INSTALL_SHORTCUT" />
+    <uses-permission
+        android:name="com.android.launcher.permission.INSTALL_SHORTCUT"
+        android:maxSdkVersion="25" />
 
     <application tools:ignore="MissingApplicationIcon">
     </application>