Better protection of device locked with secure keyguard

app/src/main/kotlin/com/tutpro/baresip/BaresipService.kt

@@ -50,11 +50,13 @@ class BaresipService: Service() {
     private lateinit var wm: WifiManager
     private lateinit var tm: TelecomManager
     private lateinit var btm: BluetoothManager
+    private lateinit var kgm: KeyguardManager
     private lateinit var partialWakeLock: PowerManager.WakeLock
     private lateinit var proximityWakeLock: PowerManager.WakeLock
     private lateinit var wifiLock: WifiManager.WifiLock
     private lateinit var bluetoothReceiver: BroadcastReceiver
     private lateinit var hotSpotReceiver: BroadcastReceiver
+    private lateinit var screenReceiver: BroadcastReceiver
 
     private var rtTimer: Timer? = null
     private var audioFocusRequest: AudioFocusRequest? = null
@@ -206,6 +208,30 @@ class BaresipService: Service() {
         this.registerReceiver(hotSpotReceiver,
             IntentFilter("android.net.wifi.WIFI_AP_STATE_CHANGED"))
 
+        kgm = getSystemService(Context.KEYGUARD_SERVICE) as KeyguardManager
+
+        screenReceiver = object : BroadcastReceiver() {
+            override fun onReceive(contxt: Context, intent: Intent) {
+                when (intent.action) {
+                    Intent.ACTION_SCREEN_ON ->
+                        if (kgm.isKeyguardLocked) {
+                            Log.d(TAG, "Screen on LOCKED")
+                            if (Utils.isVisible()) {
+                                val i = Intent("screen event")
+                                i.putExtra("event", Intent.ACTION_SCREEN_ON)
+                                LocalBroadcastManager.getInstance(this@BaresipService)
+                                        .sendBroadcast(i)
+                            }
+                        } else {
+                            Log.d(TAG, "Screen on UNLOCKED")
+                        }
+                }
+
+            }
+        }
+
+        this.registerReceiver(screenReceiver, IntentFilter(Intent.ACTION_SCREEN_ON))
+
         tm = getSystemService(Context.TELECOM_SERVICE) as TelecomManager
 
         btm = getSystemService(Context.BLUETOOTH_SERVICE) as BluetoothManager
@@ -482,6 +508,7 @@ class BaresipService: Service() {
         super.onDestroy()
         this.unregisterReceiver(bluetoothReceiver)
         this.unregisterReceiver(hotSpotReceiver)
+        this.unregisterReceiver(screenReceiver)
         if (am.isBluetoothScoOn) am.stopBluetoothSco()
         cleanService()
         if (isServiceRunning) {

app/src/main/kotlin/com/tutpro/baresip/Call.kt

@@ -103,5 +103,12 @@ class Call(val callp: String, val ua: UserAgent, val peerUri: String, val dir: S
             return null
         }
 
+        fun isIncoming(): Boolean {
+            for (call in BaresipService.calls)
+                if (call.status == "incoming")
+                    return true
+            return false
+        }
+
     }
 }

app/src/main/kotlin/com/tutpro/baresip/MainActivity.kt

@@ -41,6 +41,7 @@ import java.net.URLDecoder
 import java.util.*
 import kotlin.collections.ArrayList
 import kotlin.system.exitProcess
+import android.content.IntentFilter
 
 class MainActivity : AppCompatActivity() {
 
@@ -72,6 +73,7 @@ class MainActivity : AppCompatActivity() {
     private lateinit var am: AudioManager
     private lateinit var kgm: KeyguardManager
     private lateinit var serviceEventReceiver: BroadcastReceiver
+    private lateinit var screenEventReceiver: BroadcastReceiver
     private lateinit var quitTimer: CountDownTimer
     private lateinit var stopState: String
     private var micIcon: MenuItem? = null
@@ -120,11 +122,13 @@ class MainActivity : AppCompatActivity() {
             BaresipService.callActionUri = URLDecoder.decode(intent.data.toString(), "UTF-8")
 
         kgm = getSystemService(Context.KEYGUARD_SERVICE) as KeyguardManager
+
         dismissKeyguard()
 
         window.addFlags(WindowManager.LayoutParams.FLAG_IGNORE_CHEEK_PRESSES)
 
         setContentView(binding.root)
+
         setSupportActionBar(binding.toolbar)
 
         layout = binding.mainActivityLayout
@@ -162,6 +166,16 @@ class MainActivity : AppCompatActivity() {
         LocalBroadcastManager.getInstance(this).registerReceiver(serviceEventReceiver,
                 IntentFilter("service event"))
 
+        screenEventReceiver = object : BroadcastReceiver() {
+            override fun onReceive(context: Context, intent: Intent) {
+                val event = intent.getStringExtra("event")!!
+                if (event == Intent.ACTION_SCREEN_ON && !Call.isIncoming())
+                    dismissKeyguard()
+            }
+        }
+        LocalBroadcastManager.getInstance(this).registerReceiver(screenEventReceiver,
+                IntentFilter("screen event"))
+
         stopState = "initial"
         quitTimer = object : CountDownTimer(5000, 1000) {
             override fun onTick(millisUntilFinished: Long) {
@@ -259,16 +273,10 @@ class MainActivity : AppCompatActivity() {
         callUri.threshold = 2
         callUri.setOnFocusChangeListener { view, b ->
             if (b) {
-                if (Build.VERSION.SDK_INT >= 27) {
-                    kgm.requestDismissKeyguard(this, null)
-                }
                 imm.showSoftInput(view, InputMethodManager.SHOW_IMPLICIT)
             }
         }
         callUri.setOnClickListener { view ->
-            if (Build.VERSION.SDK_INT >= 27) {
-                kgm.requestDismissKeyguard(this, null)
-            }
             imm.showSoftInput(view, InputMethodManager.SHOW_IMPLICIT)
         }
 
@@ -1081,6 +1089,9 @@ class MainActivity : AppCompatActivity() {
                                         Toast.LENGTH_LONG).show()
                         }
                         restoreActivities()
+                        if (Build.VERSION.SDK_INT >= 22 && kgm.isDeviceLocked && kgm.isKeyguardSecure) {
+                            dismissKeyguard()
+                        }
                     }
                     "message", "message show", "message reply" -> {
                         val peer = params[1]
@@ -1910,6 +1921,7 @@ class MainActivity : AppCompatActivity() {
 
     @Suppress("DEPRECATION")
     private fun dismissKeyguard() {
+        Log.d(TAG, "Dismissing keyguard")
         if (Build.VERSION.SDK_INT >= 27) {
             setShowWhenLocked(true)
             setTurnScreenOn(true)