stub out yubico nfc support for ios

src/Android/MainActivity.cs

@@ -27,6 +27,7 @@ namespace Bit.Android
         private const string HockeyAppId = "d3834185b4a643479047b86c65293d42";
         private Java.Util.Regex.Pattern _otpPattern = Java.Util.Regex.Pattern.Compile("^.*?([cbdefghijklnrtuv]{32,64})$");
         private IDeviceActionService _deviceActionService;
+        private IDeviceInfoService _deviceInfoService;
         private ISettings _settings;
         private AppOptions _appOptions;
 
@@ -69,6 +70,7 @@ namespace Bit.Android
                 .SetValue(null, Color.FromHex("d2d6de"));
 
             _deviceActionService = Resolver.Resolve<IDeviceActionService>();
+            _deviceInfoService = Resolver.Resolve<IDeviceInfoService>();
             _settings = Resolver.Resolve<ISettings>();
             _appOptions = GetOptions();
             LoadApplication(new App.App(
@@ -134,7 +136,7 @@ namespace Bit.Android
             // ref https://bugzilla.xamarin.com/show_bug.cgi?id=36907
             Task.Delay(10).Wait();
 
-            if(Utilities.NfcEnabled())
+            if(_deviceInfoService.NfcEnabled)
             {
                 try
                 {
@@ -206,7 +208,7 @@ namespace Bit.Android
 
         private void ListenYubiKey(bool listen)
         {
-            if(!Utilities.NfcEnabled())
+            if(!_deviceInfoService.NfcEnabled)
             {
                 return;
             }

src/Android/Resources/Resource.Designer.cs

@@ -6506,17 +6506,17 @@ namespace Bit.Android
 			// aapt resource value: 0x7f0a0051
 			public const int ApplicationName = 2131361873;
 			
-			// aapt resource value: 0x7f0a00ab
+			// aapt resource value: 0x7f0a00b2
-			public const int AutoFillServiceDescription = 2131361963;
+			public const int AutoFillServiceDescription = 2131361970;
 			
-			// aapt resource value: 0x7f0a00aa
+			// aapt resource value: 0x7f0a00b1
-			public const int AutoFillServiceSummary = 2131361962;
+			public const int AutoFillServiceSummary = 2131361969;
 			
 			// aapt resource value: 0x7f0a0050
 			public const int Hello = 2131361872;
 			
-			// aapt resource value: 0x7f0a00ac
+			// aapt resource value: 0x7f0a00b3
-			public const int MyVault = 2131361964;
+			public const int MyVault = 2131361971;
 			
 			// aapt resource value: 0x7f0a0027
 			public const int abc_action_bar_home_description = 2131361831;
@@ -6671,6 +6671,27 @@ namespace Bit.Android
 			// aapt resource value: 0x7f0a000f
 			public const int common_signin_button_text_long = 2131361807;
 			
+			// aapt resource value: 0x7f0a00ac
+			public const int default_web_client_id = 2131361964;
+			
+			// aapt resource value: 0x7f0a00ad
+			public const int firebase_database_url = 2131361965;
+			
+			// aapt resource value: 0x7f0a00aa
+			public const int gcm_defaultSenderId = 2131361962;
+			
+			// aapt resource value: 0x7f0a00ae
+			public const int google_api_key = 2131361966;
+			
+			// aapt resource value: 0x7f0a00ab
+			public const int google_app_id = 2131361963;
+			
+			// aapt resource value: 0x7f0a00af
+			public const int google_crash_reporting_api_key = 2131361967;
+			
+			// aapt resource value: 0x7f0a00b0
+			public const int google_storage_bucket = 2131361968;
+			
 			// aapt resource value: 0x7f0a0052
 			public const int hockeyapp_crash_dialog_app_name_fallback = 2131361874;
 			

src/Android/Services/DeviceInfoService.cs

@@ -1,5 +1,7 @@
 using Android.App;
+using Android.Content;
 using Android.Content.PM;
+using Android.Nfc;
 using Android.OS;
 using Android.Views.Autofill;
 using Bit.App.Abstractions;
@@ -45,7 +47,7 @@ namespace Bit.Android.Services
                 return 1f;
             }
         }
-        public bool NfcEnabled => Utilities.NfcEnabled();
+        public bool NfcEnabled => NfcIsEnabled();
         public bool HasCamera => CrossCurrentActivity.Current.Activity.PackageManager.HasSystemFeature(
             PackageManager.FeatureCamera);
         public bool AutofillServiceSupported => AutofillSupported();
@@ -56,10 +58,17 @@ namespace Bit.Android.Services
             {
                 return false;
             }
-            
+
             var afm = (AutofillManager)CrossCurrentActivity.Current.Activity.GetSystemService(
                 Java.Lang.Class.FromType(typeof(AutofillManager)));
             return afm.IsAutofillSupported;
         }
+        public bool NfcIsEnabled()
+        {
+            var activity = CrossCurrentActivity.Current.Activity;
+            var manager = (NfcManager)activity.GetSystemService(Context.NfcService);
+            var adapter = manager.DefaultAdapter;
+            return adapter != null && adapter.IsEnabled;
+        }
     }
 }

src/Android/Utilities.cs

@@ -3,20 +3,12 @@ using Android.App;
 using Android.Content;
 using Java.Security;
 using System.IO;
-using Android.Nfc;
 using Android.Provider;
 
 namespace Bit.Android
 {
     public static class Utilities
     {
-        public static bool NfcEnabled()
-        {
-            var manager = (NfcManager)Application.Context.GetSystemService("nfc");
-            var adapter = manager.DefaultAdapter;
-            return adapter != null && adapter.IsEnabled;
-        }
-
         public static void SendCrashEmail(Exception e, bool includeSecurityProviders = true)
         {
             SendCrashEmail(e.Message + "\n\n" + e.StackTrace, includeSecurityProviders);

src/iOS.Core/Services/DeviceInfoService.cs

@@ -24,7 +24,7 @@ namespace Bit.iOS.Core.Services
             }
         }
         public float Scale => (float)UIScreen.MainScreen.Scale;
-        public bool NfcEnabled => false;
+        public bool NfcEnabled => CoreNFC.NFCNdefReaderSession.ReadingAvailable;
         public bool HasCamera => true;
         public bool AutofillServiceSupported => false;
         public bool HasFaceIdSupport

src/iOS/AppDelegate.cs

@@ -20,6 +20,7 @@ using Google.Analytics;
 using FFImageLoading.Forms.Touch;
 using SimpleInjector;
 using XLabs.Ioc.SimpleInjectorContainer;
+using CoreNFC;
 
 namespace Bit.iOS
 {
@@ -28,6 +29,7 @@ namespace Bit.iOS
     {
         private GaiCompletionHandler _dispatchHandler = null;
         private ILockService _lockService;
+        private IDeviceInfoService _deviceInfoService;
         private iOSPushNotificationHandler _pushHandler = null;
 
         public ISettings Settings { get; set; }
@@ -42,6 +44,7 @@ namespace Bit.iOS
             }
 
             _lockService = Resolver.Resolve<ILockService>();
+            _deviceInfoService = Resolver.Resolve<IDeviceInfoService>();
             _pushHandler = new iOSPushNotificationHandler(Resolver.Resolve<IPushNotificationListener>());
             var appIdService = Resolver.Resolve<IAppIdService>();
 
@@ -106,6 +109,26 @@ namespace Bit.iOS
                 modal.PresentViewController(activityViewController, true, null);
             });
 
+            MessagingCenter.Subscribe<Xamarin.Forms.Application, bool>(Xamarin.Forms.Application.Current,
+                    "ListenYubiKeyOTP", (sender, listen) =>
+                {
+                    if(!_deviceInfoService.NfcEnabled)
+                    {
+                        return;
+                    }
+
+                    var del = new NFCReaderDelegate((success, message) =>
+                    {
+                        Debug.WriteLine((success ? "SUCCESS! " : "ERROR! ") + message);
+                        if(success)
+                        {
+                            MessagingCenter.Send(Xamarin.Forms.Application.Current, "GotYubiKeyOTP", message);
+                        }
+                    });
+                    var session = new NFCNdefReaderSession(del, null, true);
+                    session.BeginSession();
+                });
+
             UIApplication.SharedApplication.StatusBarHidden = false;
             UIApplication.SharedApplication.StatusBarStyle = UIStatusBarStyle.LightContent;
 

src/iOS/NFCReaderDelegate.cs

@@ -0,0 +1,54 @@
+using CoreNFC;
+using Foundation;
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Text.RegularExpressions;
+
+namespace Bit.iOS
+{
+    public class NFCReaderDelegate : NFCNdefReaderSessionDelegate
+    {
+        private Regex _otpPattern = new Regex("^.*?([cbdefghijklnrtuv]{32,64})$");
+        private Action<bool, string> _callback;
+
+        public NFCReaderDelegate(Action<bool, string> callback)
+        {
+            _callback = callback;
+        }
+
+        public override void DidDetect(NFCNdefReaderSession session, NFCNdefMessage[] messages)
+        {
+            var results = new List<string>();
+            foreach(var message in messages)
+            {
+                foreach(var record in message.Records)
+                {
+                    try
+                    {
+                        results.Add(new NSString(record.Payload, NSStringEncoding.UTF8));
+                    }
+                    catch { }
+                }
+            }
+
+            foreach(var result in results)
+            {
+                Debug.WriteLine("READ TAG: " + result);
+                if(_otpPattern.IsMatch(result))
+                {
+                    Debug.WriteLine("TAG IS MATCH: " + result);
+                    _callback.Invoke(true, result);
+                    return;
+                }
+            }
+
+            _callback.Invoke(false, "No tags were read.");
+        }
+
+        public override void DidInvalidate(NFCNdefReaderSession session, NSError error)
+        {
+            _callback.Invoke(false, error?.LocalizedDescription);
+        }
+    }
+}

src/iOS/iOS.csproj

@@ -233,6 +233,7 @@
     <Compile Include="Controls\ExtendedPickerRenderer.cs" />
     <Compile Include="Controls\ExtendedEntryRenderer.cs" />
     <Compile Include="Controls\ExtendedTabbedPageRenderer.cs" />
+    <Compile Include="NFCReaderDelegate.cs" />
     <Compile Include="Services\DeviceActionService.cs" />
     <Compile Include="Main.cs" />
     <Compile Include="AppDelegate.cs" />