security settings for touch id and locking

src/App/App.cs

@@ -70,9 +70,47 @@ namespace Bit.App
 
         private async Task CheckLockAsync()
         {
-            if(_authService.IsAuthenticated && Current.MainPage.Navigation.ModalStack.LastOrDefault() as LockFingerprintPage == null)
+            // Only lock if they are logged in
+            if(!_authService.IsAuthenticated)
             {
-                await Current.MainPage.Navigation.PushModalAsync(new LockFingerprintPage(), false);
+                return;
+            }
+
+            // Lock seconds tells if if they want to lock the app or not
+            var lockSeconds = _settings.GetValueOrDefault<int?>(Constants.SettingLockSeconds);
+            if(!lockSeconds.HasValue)
+            {
+                return;
+            }
+
+            // Has it been longer than lockSeconds since the last time the app was backgrounded?
+            var now = DateTime.UtcNow;
+            var lastBackground = _settings.GetValueOrDefault(Constants.SettingLastBackgroundedDate, now.AddYears(-1));
+            if((now - lastBackground).TotalSeconds < lockSeconds.Value)
+            {
+                return;
+            }
+
+            // What method are we using to unlock?
+            var fingerprintUnlock = _settings.GetValueOrDefault<bool>(Constants.SettingFingerprintUnlockOn);
+            var pinUnlock = _settings.GetValueOrDefault<bool>(Constants.SettingPinUnlockOn);
+            if(fingerprintUnlock && _fingerprint.IsAvailable)
+            {
+                if(Device.OS == TargetPlatform.iOS)
+                {
+                    if(Current.MainPage.Navigation.ModalStack.LastOrDefault() as LockFingerprintPage == null)
+                    {
+                        await Current.MainPage.Navigation.PushModalAsync(new LockFingerprintPage(), false);
+                    }
+                }
+            }
+            else if(pinUnlock)
+            {
+
+            }
+            else
+            {
+                // Use master password to unlock if no other methods are set
             }
         }
     }

src/App/App.csproj

@@ -44,6 +44,7 @@
     <Compile Include="Behaviors\EmailValidationBehavior.cs" />
     <Compile Include="Behaviors\ConnectivityBehavior.cs" />
     <Compile Include="Behaviors\RequiredValidationBehavior.cs" />
+    <Compile Include="Constants.cs" />
     <Compile Include="Controls\DismissModalToolBarItem.cs" />
     <Compile Include="Controls\EntryLabel.cs" />
     <Compile Include="Controls\ExtendedEditor.cs" />
@@ -220,6 +221,9 @@
       <LastGenOutput>AppResources.Designer.cs</LastGenOutput>
     </EmbeddedResource>
   </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Enums\" />
+  </ItemGroup>
   <Import Project="$(MSBuildExtensionsPath32)\Microsoft\Portable\$(TargetFrameworkVersion)\Microsoft.Portable.CSharp.targets" />
   <Import Project="..\..\packages\Xamarin.Forms.2.2.0.31\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10\Xamarin.Forms.targets" Condition="Exists('..\..\packages\Xamarin.Forms.2.2.0.31\build\portable-win+net45+wp80+win81+wpa81+MonoAndroid10+MonoTouch10+Xamarin.iOS10\Xamarin.Forms.targets')" />
   <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">

src/App/Constants.cs

@@ -0,0 +1,10 @@
+namespace Bit.App
+{
+    public static class Constants
+    {
+        public const string SettingFingerprintUnlockOn = "fingerprintUnlockOn";
+        public const string SettingPinUnlockOn = "pinUnlockOn";
+        public const string SettingLockSeconds = "lockSeconds";
+        public const string SettingLastBackgroundedDate = "lastBackgroundedDate";
+    }
+}

src/App/Pages/SettingsPage.cs

@@ -5,6 +5,8 @@ using Xamarin.Forms;
 using XLabs.Ioc;
 using Bit.App.Controls;
 using Acr.UserDialogs;
+using Plugin.Settings.Abstractions;
+using Plugin.Fingerprint.Abstractions;
 
 namespace Bit.App.Pages
 {
@@ -12,28 +14,50 @@ namespace Bit.App.Pages
     {
         private readonly IAuthService _authService;
         private readonly IUserDialogs _userDialogs;
+        private readonly ISettings _settings;
+        private readonly IFingerprint _fingerprint;
+
+        // TODO: Model binding context?
 
         public SettingsPage()
         {
             _authService = Resolver.Resolve<IAuthService>();
             _userDialogs = Resolver.Resolve<IUserDialogs>();
+            _settings = Resolver.Resolve<ISettings>();
+            _fingerprint = Resolver.Resolve<IFingerprint>();
 
             Init();
         }
 
+        private ExtendedSwitchCell PinCell { get; set; }
+        private ExtendedSwitchCell FingerprintCell { get; set; }
+        private ExtendedTextCell LockOptionsCell { get; set; }
+
         private void Init()
         {
-            var touchIdCell = new ExtendedSwitchCell
+            FingerprintCell = new ExtendedSwitchCell
             {
-                Text = "Use Touch ID"
+                Text = "Use Touch ID" + (!_fingerprint.IsAvailable ? " (Unavilable)" : null),
+                On = _settings.GetValueOrDefault<bool>(Constants.SettingFingerprintUnlockOn),
+                IsEnabled = _fingerprint.IsAvailable
             };
-            touchIdCell.OnChanged += TouchIdCell_Changed;
+            FingerprintCell.OnChanged += FingerprintCell_Changed;
 
-            var lockOnExitCell = new ExtendedSwitchCell
+            PinCell = new ExtendedSwitchCell
             {
-                Text = "Lock Immediately On Exit"
+                Text = "Use PIN Code",
+                On = _settings.GetValueOrDefault<bool>(Constants.SettingPinUnlockOn)
             };
-            lockOnExitCell.OnChanged += LockOnExitCell_Changed;
+            PinCell.OnChanged += PinCell_Changed;
+
+            LockOptionsCell = new ExtendedTextCell
+            {
+                Text = "Lock Options",
+                // TODO: Set detail based on setting
+                Detail = "Immediately",
+                ShowDisclousure = true
+            };
+            LockOptionsCell.Tapped += LockOptionsCell_Tapped;
 
             var changeMasterPasswordCell = new ExtendedTextCell
             {
@@ -72,8 +96,9 @@ namespace Bit.App.Pages
                 {
                     new TableSection("Security")
                     {
-                        touchIdCell,
-                        lockOnExitCell,
+                        LockOptionsCell,
+                        FingerprintCell,
+                        PinCell,
                         changeMasterPasswordCell
                     },
                     new TableSection("Manage Folders")
@@ -97,6 +122,29 @@ namespace Bit.App.Pages
             Content = table;
         }
 
+        private async void LockOptionsCell_Tapped(object sender, EventArgs e)
+        {
+            var selection = await DisplayActionSheet("Lock Options", AppResources.Cancel, null,
+                "Immediately", "1 minute", "3 minutes", "15 minutes", "1 hour", "8 hours", "24 hours", "Never");
+
+            if(selection == "Immediately")
+            {
+                _settings.AddOrUpdateValue(Constants.SettingLockSeconds, 0);
+            }
+            else if(selection == "1 minute")
+            {
+                _settings.AddOrUpdateValue(Constants.SettingLockSeconds, 60);
+            }
+            // TODO: others
+            else
+            {
+                // Never lock
+                _settings.Remove(Constants.SettingLockSeconds);
+            }
+
+            LockOptionsCell.Detail = selection;
+        }
+
         private void LockCell_Tapped(object sender, EventArgs e)
         {
 
@@ -113,11 +161,6 @@ namespace Bit.App.Pages
             Application.Current.MainPage = new LoginNavigationPage();
         }
 
-        private void LockOnExitCell_Changed(object sender, EventArgs e)
-        {
-
-        }
-
         private async void ChangeMasterPasswordCell_Tapped(object sender, EventArgs e)
         {
             if(!await _userDialogs.ConfirmAsync("You can change your master password on the bitwarden.com web vault. Do you want to visit the website now?", null, AppResources.Yes, AppResources.Cancel))
@@ -128,9 +171,37 @@ namespace Bit.App.Pages
             Device.OpenUri(new Uri("https://vault.bitwarden.com"));
         }
 
-        private void TouchIdCell_Changed(object sender, EventArgs e)
+        private void FingerprintCell_Changed(object sender, EventArgs e)
         {
-            
+            var cell = sender as ExtendedSwitchCell;
+            if(cell == null)
+            {
+                return;
+            }
+
+            _settings.AddOrUpdateValue(Constants.SettingFingerprintUnlockOn, cell.On);
+
+            if(cell.On)
+            {
+                _settings.AddOrUpdateValue(Constants.SettingPinUnlockOn, false);
+                PinCell.On = false;
+            }
+        }
+
+        private void PinCell_Changed(object sender, EventArgs e)
+        {
+            var cell = sender as ExtendedSwitchCell;
+            if(cell == null)
+            {
+                return;
+            }
+
+            _settings.AddOrUpdateValue(Constants.SettingPinUnlockOn, cell.On);
+            if(cell.On)
+            {
+                _settings.AddOrUpdateValue(Constants.SettingFingerprintUnlockOn, false);
+                FingerprintCell.On = false;
+            }
         }
 
         private void FoldersCell_Tapped(object sender, EventArgs e)

src/iOS/AppDelegate.cs

@@ -19,6 +19,7 @@ using Plugin.Fingerprint.Abstractions;
 using Plugin.Settings.Abstractions;
 using System.Diagnostics;
 using Xamarin.Forms;
+using Bit.App;
 
 namespace Bit.iOS
 {
@@ -61,13 +62,17 @@ namespace Bit.iOS
 
         public override void DidEnterBackground(UIApplication uiApplication)
         {
-            var colourView = new UIView(UIApplication.SharedApplication.KeyWindow.Frame)
+            // TODO: Make this an image view
+            var colorView = new UIView(UIApplication.SharedApplication.KeyWindow.Frame)
             {
                 BackgroundColor = UIColor.Black,
                 Tag = 4321
             };
-            UIApplication.SharedApplication.KeyWindow.AddSubview(colourView);
-            UIApplication.SharedApplication.KeyWindow.BringSubviewToFront(colourView);
+            UIApplication.SharedApplication.KeyWindow.AddSubview(colorView);
+            UIApplication.SharedApplication.KeyWindow.BringSubviewToFront(colorView);
+
+            // Log the date/time we last backgrounded
+            CrossSettings.Current.AddOrUpdateValue(Constants.SettingLastBackgroundedDate, DateTime.UtcNow);
 
             base.DidEnterBackground(uiApplication);
             Debug.WriteLine("DidEnterBackground");
@@ -107,7 +112,7 @@ namespace Bit.iOS
 
         private void SendLockMessage()
         {
-            MessagingCenter.Send<App.App>(_app, "Lock");
+            MessagingCenter.Send(_app, "Lock");
 
         }