add support for Duo Organization 2FA

src/App/Enums/TwoFactorProviderType.cs

@@ -7,6 +7,7 @@
         Duo = 2,
         YubiKey = 3,
         U2f = 4,
-        Remember = 5
+        Remember = 5,
+        OrganizationDuo = 6
     }
 }

src/App/Pages/LoginTwoFactorPage.cs

@@ -31,10 +31,12 @@ namespace Bit.App.Pages
         private readonly Dictionary<TwoFactorProviderType, Dictionary<string, object>> _providers;
         private TwoFactorProviderType? _providerType;
         private readonly FullLoginResult _result;
+        private readonly string _duoOrgTitle;
 
         public LoginTwoFactorPage(string email, FullLoginResult result, TwoFactorProviderType? type = null)
             : base(updateActivity: false, requireAuth: false)
         {
+            _duoOrgTitle = $"Duo ({AppResources.Organization})";
             _deviceInfoService = Resolver.Resolve<IDeviceInfoService>();
 
             _email = email;
@@ -180,9 +182,10 @@ namespace Bit.App.Pages
                 Content = scrollView;
                 TokenCell.Entry.FocusWithDelay();
             }
-            else if(_providerType == TwoFactorProviderType.Duo)
+            else if(_providerType == TwoFactorProviderType.Duo ||
+                _providerType == TwoFactorProviderType.OrganizationDuo)
             {
-                var duoParams = _providers[TwoFactorProviderType.Duo];
+                var duoParams = _providers[_providerType.Value];
 
                 var host = WebUtility.UrlEncode(duoParams["Host"].ToString());
                 var req = WebUtility.UrlEncode(duoParams["Signature"].ToString());
@@ -224,7 +227,7 @@ namespace Bit.App.Pages
                 table.WrappingStackLayout = () => layout;
                 scrollView.Content = layout;
 
-                Title = "Duo";
+                Title = _providerType == TwoFactorProviderType.Duo ? "Duo" : _duoOrgTitle;
                 Content = scrollView;
             }
             else if(_providerType == TwoFactorProviderType.YubiKey)
@@ -312,6 +315,11 @@ namespace Bit.App.Pages
             var beforeProviderType = _providerType;
 
             var options = new List<string>();
+            if(_providers.ContainsKey(TwoFactorProviderType.OrganizationDuo))
+            {
+                options.Add(_duoOrgTitle);
+            }
+
             if(_providers.ContainsKey(TwoFactorProviderType.Authenticator))
             {
                 options.Add(AppResources.AuthenticatorAppTitle);
@@ -349,6 +357,10 @@ namespace Bit.App.Pages
             {
                 _providerType = TwoFactorProviderType.Duo;
             }
+            else if(selection == _duoOrgTitle)
+            {
+                _providerType = TwoFactorProviderType.OrganizationDuo;
+            }
             else if(selection == AppResources.YubiKeyTitle)
             {
                 _providerType = TwoFactorProviderType.YubiKey;
@@ -448,7 +460,8 @@ namespace Bit.App.Pages
                     switch(p.Key)
                     {
                         case TwoFactorProviderType.Authenticator:
-                            if(provider == TwoFactorProviderType.Duo || provider == TwoFactorProviderType.YubiKey)
+                            if(provider == TwoFactorProviderType.Duo || provider == TwoFactorProviderType.YubiKey ||
+                                provider == TwoFactorProviderType.OrganizationDuo)
                             {
                                 continue;
                             }
@@ -460,18 +473,26 @@ namespace Bit.App.Pages
                             }
                             break;
                         case TwoFactorProviderType.Duo:
-                            if(provider == TwoFactorProviderType.YubiKey)
+                            if(provider == TwoFactorProviderType.YubiKey ||
+                                provider == TwoFactorProviderType.OrganizationDuo)
                             {
                                 continue;
                             }
                             break;
                         case TwoFactorProviderType.YubiKey:
+                            if(provider == TwoFactorProviderType.OrganizationDuo)
+                            {
+                                continue;
+                            }
+
                             var nfcKey = p.Value.ContainsKey("Nfc") && (bool)p.Value["Nfc"];
                             if((!_deviceInfoService.NfcEnabled || !nfcKey) && Device.RuntimePlatform != Device.UWP)
                             {
                                 continue;
                             }
                             break;
+                        case TwoFactorProviderType.OrganizationDuo:
+                            break;
                         default:
                             continue;
                     }

src/App/Resources/AppResources.Designer.cs

@@ -2364,6 +2364,15 @@ namespace Bit.App.Resources {
             }
         }
         
+        /// <summary>
+        ///   Looks up a localized string similar to Organization.
+        /// </summary>
+        public static string Organization {
+            get {
+                return ResourceManager.GetString("Organization", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   Looks up a localized string similar to Other.
         /// </summary>

src/App/Resources/AppResources.resx

@@ -1289,4 +1289,8 @@
   <data name="AutofillAndSave" xml:space="preserve">
     <value>Auto-fill and save</value>
   </data>
+  <data name="Organization" xml:space="preserve">
+    <value>Organization</value>
+    <comment>An entity of multiple related people (ex. a team or business organization).</comment>
+  </data>
 </root>