Merge pull request #390 from LizardWithHat/reauthenticate_after_inactivity

added ability to ask for reauthentification after device inactivity

app/src/main/java/org/shadowice/flocke/andotp/Activities/MainActivity.java

@@ -33,6 +33,7 @@ import android.content.SharedPreferences;
 import android.content.pm.PackageManager;
 import android.content.res.Configuration;
 import android.os.Bundle;
+import android.os.CountDownTimer;
 import android.os.Handler;
 import android.preference.PreferenceManager;
 import androidx.annotation.NonNull;
@@ -108,6 +109,8 @@ public class MainActivity extends BaseActivity
     private ActionBarDrawerToggle tagsToggle;
     private String filterString;
 
+    private CountDownTimer countDownTimer;
+
     // QR code scanning
     private void scanQRCode(){
         new IntentIntegrator(MainActivity.this)
@@ -353,6 +356,8 @@ public class MainActivity extends BaseActivity
                 }
                 checkIntent();
             }
+
+            if(setCountDownTimerNow()) countDownTimer.start();
         }
 
         if (filterString != null) {
@@ -378,6 +383,7 @@ public class MainActivity extends BaseActivity
             });
         super.onPause();
         stopUpdater();
+        countDownTimer.cancel();
     }
 
     @Override
@@ -751,6 +757,32 @@ public class MainActivity extends BaseActivity
         adapter.filterByTags(tagsDrawerAdapter.getActiveTags());
     }
 
+    @Override
+    public void onUserInteraction(){
+        super.onUserInteraction();
+
+        // Refresh Blackout Timer
+        if(countDownTimer != null) countDownTimer.cancel();
+        if(setCountDownTimerNow()) countDownTimer.start();
+    }
+
+    private boolean setCountDownTimerNow() {
+        int secondsToBlackout = 1000 * settings.getAuthInactivityDelay();
+        if(settings.getAuthMethod() == AuthMethod.NONE || !settings.getAuthInactivity() || secondsToBlackout == 0 ) return false;
+        countDownTimer = new CountDownTimer(secondsToBlackout, 1000) {
+            @Override
+            public void onTick(long millisUntilFinished) {
+            }
+
+            @Override
+            public void onFinish() {
+                authenticate(R.string.auth_msg_authenticate);
+                this.cancel();
+            }
+        };
+        return true;
+    }
+
     private void openFileWithPermissions(int intentId){
         if (ContextCompat.checkSelfPermission(this, Manifest.permission.READ_EXTERNAL_STORAGE) == PackageManager.PERMISSION_GRANTED) {
             showOpenFileSelector(intentId);
@@ -778,6 +810,7 @@ public class MainActivity extends BaseActivity
             super.onRequestPermissionsResult(requestCode, permissions, grantResults);
         }
     }
+    
     private void addQRCode(String result){
         if(!TextUtils.isEmpty(result)) {
             try {

app/src/main/java/org/shadowice/flocke/andotp/Utilities/Settings.java

@@ -546,6 +546,14 @@ public class Settings {
     public boolean getIsAppendingDateTimeToBackups() {
         return getBoolean(R.string.settings_key_backup_append_date_time, false);
     }
+
+    public int getAuthInactivityDelay() {
+        return getIntValue(R.string.settings_key_auth_inactivity_delay, 0);
+    }
+
+    public boolean getAuthInactivity() {
+        return getBoolean(R.string.settings_key_auth_inactivity, false);
+    }
   
     public boolean isMinimizeAppOnCopyEnabled() {
         return  getBoolean(R.string.settings_key_minimize_on_copy, false);

app/src/main/res/values/settings.xml

@@ -16,6 +16,8 @@
     <string name="settings_key_encryption" translatable="false">pref_encryption</string>
     <string name="settings_key_panic" translatable="false">pref_panic</string>
     <string name="settings_key_relock_screen_off" translatable="false">pref_relock_screen_off</string>
+    <string name="settings_key_auth_inactivity" translatable="false">pref_auth_inactivity</string>
+    <string name="settings_key_auth_inactivity_delay" translatable="false">pref_auth_inactivity_timeout</string>
     <string name="settings_key_block_accessibility" translatable="false">pref_block_accessibility</string>
 
     <string name="settings_key_lang" translatable="false">pref_lang</string>    <!-- Deprecated -->
@@ -60,6 +62,7 @@
 
     <!-- Default values -->
     <integer name="settings_default_tap_to_reveal_timeout">30</integer>
+    <integer name="settings_default_auth_inactivity_delay">30</integer>
     <string name="settings_default_encryption" translatable="false">keystore</string>
     <string name="settings_default_locale" translatable="false">system</string>
     <string name="settings_default_theme" translatable="false">light</string>
@@ -210,4 +213,6 @@
     <integer name="settings_max_tap_to_reveal_timeout">60</integer>
     <integer name="settings_min_label_size">12</integer>
     <integer name="settings_max_label_size">24</integer>
+    <integer name="settings_auth_min_inactivity_delay">10</integer>
+    <integer name="settings_auth_max_inactivity_delay">360</integer>
 </resources>

app/src/main/res/values/strings_settings.xml

@@ -16,6 +16,8 @@
     <string name="settings_title_encryption">Database encryption</string>
     <string name="settings_title_panic">Panic Trigger</string>
     <string name="settings_title_relock_screen_off">Re-lock on screen off</string>
+    <string name="settings_title_auth_inactivity">Re-lock on inactivity</string>
+    <string name="settings_title_auth_inactivity_delay">Delay for inactivity re-lock</string>
     <string name="settings_title_block_accessibility">Block accessibility services</string>
 
     <string name="settings_title_lang">Language</string>
@@ -55,6 +57,10 @@
     <string name="settings_desc_panic">Decide what happens when a Panic Trigger is received</string>
     <string name="settings_desc_relock_screen_off">Require authentication after the devices screen
         has been turned off</string>
+    <string name="settings_desc_auth_inactivity">Require authenticication after the device has been
+        inactive</string>
+    <string name="settings_desc_auth_inactivity_delay">Select the time (in sec) after which to
+        require reauthentication</string>
     <string name="settings_desc_block_accessibility">Hide sensitive fields from the accessibility
         services. <b>DO NOT enable this if you rely on the accessibility services!</b></string>
 

app/src/main/res/xml/preferences.xml

@@ -48,6 +48,21 @@
             android:summary="@string/settings_desc_relock_screen_off"
             android:defaultValue="true" />
 
+        <CheckBoxPreference
+            android:key="@string/settings_key_auth_inactivity"
+            android:title="@string/settings_title_auth_inactivity"
+            android:summary="@string/settings_desc_auth_inactivity"
+            android:defaultValue="false" />
+
+        <com.vanniktech.vntnumberpickerpreference.VNTNumberPickerPreference
+            android:key="@string/settings_key_auth_inactivity_delay"
+            android:title="@string/settings_title_auth_inactivity_delay"
+            android:dialogMessage="@string/settings_desc_auth_inactivity_delay"
+            android:defaultValue="@integer/settings_default_auth_inactivity_delay"
+            android:dependency="@string/settings_key_auth_inactivity"
+            app:vnt_minValue="@integer/settings_auth_min_inactivity_delay"
+            app:vnt_maxValue="@integer/settings_auth_max_inactivity_delay" />
+
         <CheckBoxPreference
             android:key="@string/settings_key_block_accessibility"
             android:title="@string/settings_title_block_accessibility"