stub our 2fa page backend

src/App/Pages/Accounts/TwoFactorPage.xaml.cs

@@ -1,5 +1,4 @@
 using System;
-using Xamarin.Forms;
 
 namespace Bit.App.Pages
 {
@@ -14,25 +13,33 @@ namespace Bit.App.Pages
             _vm.Page = this;
         }
 
-        protected override async void OnAppearing()
+        protected override void OnAppearing()
         {
             base.OnAppearing();
-            await _vm.InitAsync();
+            _vm.Init();
         }
 
-        private void Continue_Clicked(object sender, EventArgs e)
+        private async void Continue_Clicked(object sender, EventArgs e)
         {
             if(DoOnce())
             {
-
+                await _vm.SubmitAsync();
             }
         }
 
-        private void Methods_Clicked(object sender, EventArgs e)
+        private async void Methods_Clicked(object sender, EventArgs e)
         {
             if(DoOnce())
             {
+                await _vm.AnotherMethodAsync();
+            }
+        }
 
+        private async void ResendEmail_Clicked(object sender, EventArgs e)
+        {
+            if(DoOnce())
+            {
+                await _vm.SendEmailAsync(true, true);
             }
         }
     }

src/App/Pages/Accounts/TwoFactorPageViewModel.cs

@@ -1,8 +1,11 @@
 using Bit.App.Abstractions;
 using Bit.App.Resources;
 using Bit.Core.Abstractions;
+using Bit.Core.Enums;
 using Bit.Core.Exceptions;
+using Bit.Core.Models.Request;
 using Bit.Core.Utilities;
+using System.Linq;
 using System.Threading.Tasks;
 using Xamarin.Forms;
 
@@ -14,8 +17,12 @@ namespace Bit.App.Pages
         private readonly IAuthService _authService;
         private readonly ISyncService _syncService;
         private readonly IStorageService _storageService;
+        private readonly IApiService _apiService;
+        private readonly IPlatformUtilsService _platformUtilsService;
 
-        private string _email;
+        private bool _u2fSupported = false;
+        private TwoFactorProviderType? _selectedProviderType;
+        private string _twoFactorEmail;
 
         public TwoFactorPageViewModel()
         {
@@ -23,22 +30,178 @@ namespace Bit.App.Pages
             _authService = ServiceContainer.Resolve<IAuthService>("authService");
             _syncService = ServiceContainer.Resolve<ISyncService>("syncService");
             _storageService = ServiceContainer.Resolve<IStorageService>("storageService");
+            _apiService = ServiceContainer.Resolve<IApiService>("apiService");
+            _platformUtilsService = ServiceContainer.Resolve<IPlatformUtilsService>("platformUtilsService");
         }
 
-        public string Email
+        public string TwoFactorEmail
         {
-            get => _email;
-            set => SetProperty(ref _email, value);
+            get => _twoFactorEmail;
+            set => SetProperty(ref _twoFactorEmail, value);
         }
 
-        public async Task InitAsync()
-        {
+        public bool Remember { get; set; }
 
+        public string Token { get; set; }
+
+        public bool DuoMethod => SelectedProviderType == TwoFactorProviderType.Email;
+
+        public bool YubikeyMethod => SelectedProviderType == TwoFactorProviderType.YubiKey;
+
+        public bool AuthenticatorMethod => SelectedProviderType == TwoFactorProviderType.Authenticator;
+
+        public bool EmailMethod => SelectedProviderType == TwoFactorProviderType.Email;
+
+        public TwoFactorProviderType? SelectedProviderType
+        {
+            get => _selectedProviderType;
+            set => SetProperty(ref _selectedProviderType, value, additionalPropertyNames: new string[]
+            {
+                nameof(EmailMethod),
+                nameof(DuoMethod),
+                nameof(YubikeyMethod),
+                nameof(AuthenticatorMethod)
+            });
+        }
+
+        public void Init()
+        {
+            if(string.IsNullOrWhiteSpace(_authService.Email) ||
+                string.IsNullOrWhiteSpace(_authService.MasterPasswordHash) ||
+                _authService.TwoFactorProvidersData == null)
+            {
+                // TODO: dismiss modal?
+                return;
+            }
+
+            // TODO: init U2F
+            _u2fSupported = false;
+
+            var selectedProviderType = _authService.GetDefaultTwoFactorProvider(_u2fSupported);
+            Load();
+        }
+
+        public void Load()
+        {
+            if(SelectedProviderType == null)
+            {
+                PageTitle = AppResources.LoginUnavailable;
+                return;
+            }
+            PageTitle = _authService.TwoFactorProviders[SelectedProviderType.Value].Name;
+            var providerData = _authService.TwoFactorProvidersData[SelectedProviderType.Value];
+            switch(SelectedProviderType.Value)
+            {
+                case TwoFactorProviderType.U2f:
+                    // TODO
+                    break;
+                case TwoFactorProviderType.Duo:
+                case TwoFactorProviderType.OrganizationDuo:
+                    // TODO: init duo
+                    var host = providerData["Host"] as string;
+                    var signature = providerData["Signature"] as string;
+                    break;
+                case TwoFactorProviderType.Email:
+                    TwoFactorEmail = providerData["Email"] as string;
+                    if(_authService.TwoFactorProvidersData.Count > 1)
+                    {
+                        var emailTask = Task.Run(() => SendEmailAsync(false, false));
+                    }
+                    break;
+                default:
+                    break;
+            }
         }
 
         public async Task SubmitAsync()
         {
+            if(SelectedProviderType == null)
+            {
+                return;
+            }
+            if(string.IsNullOrWhiteSpace(Token))
+            {
+                await _platformUtilsService.ShowDialogAsync(
+                    string.Format(AppResources.ValidationFieldRequired, AppResources.VerificationCode),
+                    AppResources.AnErrorHasOccurred);
+            }
+            if(SelectedProviderType == TwoFactorProviderType.Email ||
+                SelectedProviderType == TwoFactorProviderType.Authenticator)
+            {
+                Token = Token.Replace(" ", string.Empty).Trim();
+            }
 
+            try
+            {
+                await _deviceActionService.ShowLoadingAsync(AppResources.LoggingIn);
+                await _authService.LogInTwoFactorAsync(SelectedProviderType.Value, Token, Remember);
+                await _deviceActionService.HideLoadingAsync();
+                var task = Task.Run(() => _syncService.FullSyncAsync(true));
+                Application.Current.MainPage = new TabsPage();
+            }
+            catch(ApiException e)
+            {
+                await _deviceActionService.HideLoadingAsync();
+                await _platformUtilsService.ShowDialogAsync(e.Error.GetSingleMessage(),
+                    AppResources.AnErrorHasOccurred);
+            }
+        }
+
+        public async Task AnotherMethodAsync()
+        {
+            var supportedProviders = _authService.GetSupportedTwoFactorProviders();
+            var options = supportedProviders.Select(p => p.Name).ToList();
+            options.Add(AppResources.RecoveryCodeTitle);
+            var method = await Page.DisplayActionSheet(AppResources.TwoStepLoginOptions, AppResources.Cancel,
+                null, options.ToArray());
+            if(method == AppResources.RecoveryCodeTitle)
+            {
+                _platformUtilsService.LaunchUri("https://help.bitwarden.com/article/lost-two-step-device/");
+            }
+            else
+            {
+                SelectedProviderType = supportedProviders.FirstOrDefault(p => p.Name == method)?.Type;
+                Load();
+            }
+        }
+
+        public async Task<bool> SendEmailAsync(bool showLoading, bool doToast)
+        {
+            if(SelectedProviderType != TwoFactorProviderType.Email)
+            {
+                return false;
+            }
+            try
+            {
+                if(showLoading)
+                {
+                    await _deviceActionService.ShowLoadingAsync(AppResources.Submitting);
+                }
+                var request = new TwoFactorEmailRequest
+                {
+                    Email = _authService.Email,
+                    MasterPasswordHash = _authService.MasterPasswordHash
+                };
+                await _apiService.PostTwoFactorEmailAsync(request);
+                if(showLoading)
+                {
+                    await _deviceActionService.HideLoadingAsync();
+                }
+                if(doToast)
+                {
+                    _platformUtilsService.ShowToast("success", null, AppResources.VerificationEmailSent);
+                }
+                return true;
+            }
+            catch(ApiException)
+            {
+                if(showLoading)
+                {
+                    await _deviceActionService.HideLoadingAsync();
+                }
+                await _platformUtilsService.ShowDialogAsync(AppResources.VerificationEmailNotSent);
+                return false;
+            }
         }
     }
 }

src/Core/Abstractions/IApiService.cs

@@ -44,5 +44,6 @@ namespace Bit.Core.Abstractions
         Task PostShareCipherAttachmentAsync(string id, string attachmentId, MultipartFormDataContent data,
             string organizationId);
         Task<List<BreachAccountResponse>> GetHibpBreachAsync(string username);
+        Task PostTwoFactorEmailAsync(TwoFactorEmailRequest request);
     }
 }

src/Core/Abstractions/IAuthService.cs

@@ -11,7 +11,8 @@ namespace Bit.Core.Abstractions
         string Email { get; set; }
         string MasterPasswordHash { get; set; }
         TwoFactorProviderType? SelectedTwoFactorProviderType { get; set; }
-        Dictionary<TwoFactorProviderType, Dictionary<string, object>> TwoFactorProviders { get; set; }
+        Dictionary<TwoFactorProviderType, TwoFactorProvider> TwoFactorProviders { get; set; }
+        Dictionary<TwoFactorProviderType, Dictionary<string, object>> TwoFactorProvidersData { get; set; }
 
         TwoFactorProviderType? GetDefaultTwoFactorProvider(bool u2fSupported);
         List<TwoFactorProvider> GetSupportedTwoFactorProviders();

src/Core/Models/Request/TwoFactorEmailRequest.cs

@@ -0,0 +1,8 @@
+namespace Bit.Core.Models.Request
+{
+    public class TwoFactorEmailRequest
+    {
+        public string Email { get; set; }
+        public string MasterPasswordHash { get; set; }
+    }
+}

src/Core/Services/ApiService.cs

@@ -271,6 +271,16 @@ namespace Bit.Core.Services
 
         #endregion
 
+        #region Two Factor APIs
+
+        public Task PostTwoFactorEmailAsync(TwoFactorEmailRequest request)
+        {
+            return SendAsync<TwoFactorEmailRequest, object>(
+                HttpMethod.Post, "/two-factor/send-email-login", request, false, false);
+        }
+
+        #endregion
+
         #region HIBP APIs
 
         public Task<List<BreachAccountResponse>> GetHibpBreachAsync(string username)

src/Core/Services/AuthService.cs

@@ -24,7 +24,6 @@ namespace Bit.Core.Services
         private SymmetricCryptoKey _key;
         private KdfType? _kdf;
         private int? _kdfIterations;
-        private Dictionary<TwoFactorProviderType, TwoFactorProvider> _twoFactorProviders;
 
         public AuthService(
             ICryptoService cryptoService,
@@ -47,21 +46,21 @@ namespace Bit.Core.Services
             _messagingService = messagingService;
             _setCryptoKeys = setCryptoKeys;
 
-            _twoFactorProviders = new Dictionary<TwoFactorProviderType, TwoFactorProvider>();
-            _twoFactorProviders.Add(TwoFactorProviderType.Authenticator, new TwoFactorProvider
+            TwoFactorProviders = new Dictionary<TwoFactorProviderType, TwoFactorProvider>();
+            TwoFactorProviders.Add(TwoFactorProviderType.Authenticator, new TwoFactorProvider
             {
                 Type = TwoFactorProviderType.Authenticator,
                 Priority = 1,
                 Sort = 1
             });
-            _twoFactorProviders.Add(TwoFactorProviderType.YubiKey, new TwoFactorProvider
+            TwoFactorProviders.Add(TwoFactorProviderType.YubiKey, new TwoFactorProvider
             {
                 Type = TwoFactorProviderType.YubiKey,
                 Priority = 3,
                 Sort = 2,
                 Premium = true
             });
-            _twoFactorProviders.Add(TwoFactorProviderType.Duo, new TwoFactorProvider
+            TwoFactorProviders.Add(TwoFactorProviderType.Duo, new TwoFactorProvider
             {
                 Type = TwoFactorProviderType.Duo,
                 Name = "Duo",
@@ -69,21 +68,21 @@ namespace Bit.Core.Services
                 Sort = 3,
                 Premium = true
             });
-            _twoFactorProviders.Add(TwoFactorProviderType.OrganizationDuo, new TwoFactorProvider
+            TwoFactorProviders.Add(TwoFactorProviderType.OrganizationDuo, new TwoFactorProvider
             {
                 Type = TwoFactorProviderType.OrganizationDuo,
                 Name = "Duo (Organization)",
                 Priority = 10,
                 Sort = 4
             });
-            _twoFactorProviders.Add(TwoFactorProviderType.U2f, new TwoFactorProvider
+            TwoFactorProviders.Add(TwoFactorProviderType.U2f, new TwoFactorProvider
             {
                 Type = TwoFactorProviderType.U2f,
                 Priority = 4,
                 Sort = 5,
                 Premium = true
             });
-            _twoFactorProviders.Add(TwoFactorProviderType.Email, new TwoFactorProvider
+            TwoFactorProviders.Add(TwoFactorProviderType.Email, new TwoFactorProvider
             {
                 Type = TwoFactorProviderType.Email,
                 Priority = 0,
@@ -93,25 +92,26 @@ namespace Bit.Core.Services
 
         public string Email { get; set; }
         public string MasterPasswordHash { get; set; }
-        public Dictionary<TwoFactorProviderType, Dictionary<string, object>> TwoFactorProviders { get; set; }
+        public Dictionary<TwoFactorProviderType, TwoFactorProvider> TwoFactorProviders { get; set; }
+        public Dictionary<TwoFactorProviderType, Dictionary<string, object>> TwoFactorProvidersData { get; set; }
         public TwoFactorProviderType? SelectedTwoFactorProviderType { get; set; }
 
         public void Init()
         {
-            _twoFactorProviders[TwoFactorProviderType.Email].Name = _i18nService.T("EmailTitle");
-            _twoFactorProviders[TwoFactorProviderType.Email].Description = _i18nService.T("EmailDesc");
-            _twoFactorProviders[TwoFactorProviderType.Authenticator].Name = _i18nService.T("AuthenticatorAppTitle");
-            _twoFactorProviders[TwoFactorProviderType.Authenticator].Description =
+            TwoFactorProviders[TwoFactorProviderType.Email].Name = _i18nService.T("EmailTitle");
+            TwoFactorProviders[TwoFactorProviderType.Email].Description = _i18nService.T("EmailDesc");
+            TwoFactorProviders[TwoFactorProviderType.Authenticator].Name = _i18nService.T("AuthenticatorAppTitle");
+            TwoFactorProviders[TwoFactorProviderType.Authenticator].Description =
                 _i18nService.T("AuthenticatorAppDesc");
-            _twoFactorProviders[TwoFactorProviderType.Duo].Description = _i18nService.T("DuoDesc");
-            _twoFactorProviders[TwoFactorProviderType.OrganizationDuo].Name =
+            TwoFactorProviders[TwoFactorProviderType.Duo].Description = _i18nService.T("DuoDesc");
+            TwoFactorProviders[TwoFactorProviderType.OrganizationDuo].Name =
                 string.Format("Duo ({0})", _i18nService.T("Organization"));
-            _twoFactorProviders[TwoFactorProviderType.OrganizationDuo].Description =
+            TwoFactorProviders[TwoFactorProviderType.OrganizationDuo].Description =
                 _i18nService.T("DuoOrganizationDesc");
-            _twoFactorProviders[TwoFactorProviderType.U2f].Name = _i18nService.T("U2fTitle");
-            _twoFactorProviders[TwoFactorProviderType.U2f].Description = _i18nService.T("U2fDesc");
-            _twoFactorProviders[TwoFactorProviderType.YubiKey].Name = _i18nService.T("YubiKeyTitle");
-            _twoFactorProviders[TwoFactorProviderType.YubiKey].Description = _i18nService.T("YubiKeyDesc");
+            TwoFactorProviders[TwoFactorProviderType.U2f].Name = _i18nService.T("U2fTitle");
+            TwoFactorProviders[TwoFactorProviderType.U2f].Description = _i18nService.T("U2fDesc");
+            TwoFactorProviders[TwoFactorProviderType.YubiKey].Name = _i18nService.T("YubiKeyTitle");
+            TwoFactorProviders[TwoFactorProviderType.YubiKey].Description = _i18nService.T("YubiKeyDesc");
         }
 
         public async Task<AuthResult> LogInAsync(string email, string masterPassword)
@@ -146,56 +146,56 @@ namespace Bit.Core.Services
         public List<TwoFactorProvider> GetSupportedTwoFactorProviders()
         {
             var providers = new List<TwoFactorProvider>();
-            if(TwoFactorProviders == null)
+            if(TwoFactorProvidersData == null)
             {
                 return providers;
             }
-            if(TwoFactorProviders.ContainsKey(TwoFactorProviderType.OrganizationDuo) &&
+            if(TwoFactorProvidersData.ContainsKey(TwoFactorProviderType.OrganizationDuo) &&
                 _platformUtilsService.SupportsDuo())
             {
-                providers.Add(_twoFactorProviders[TwoFactorProviderType.OrganizationDuo]);
+                providers.Add(TwoFactorProviders[TwoFactorProviderType.OrganizationDuo]);
             }
-            if(TwoFactorProviders.ContainsKey(TwoFactorProviderType.Authenticator))
+            if(TwoFactorProvidersData.ContainsKey(TwoFactorProviderType.Authenticator))
             {
-                providers.Add(_twoFactorProviders[TwoFactorProviderType.Authenticator]);
+                providers.Add(TwoFactorProviders[TwoFactorProviderType.Authenticator]);
             }
-            if(TwoFactorProviders.ContainsKey(TwoFactorProviderType.YubiKey))
+            if(TwoFactorProvidersData.ContainsKey(TwoFactorProviderType.YubiKey))
             {
-                providers.Add(_twoFactorProviders[TwoFactorProviderType.YubiKey]);
+                providers.Add(TwoFactorProviders[TwoFactorProviderType.YubiKey]);
             }
-            if(TwoFactorProviders.ContainsKey(TwoFactorProviderType.Duo) && _platformUtilsService.SupportsDuo())
+            if(TwoFactorProvidersData.ContainsKey(TwoFactorProviderType.Duo) && _platformUtilsService.SupportsDuo())
             {
-                providers.Add(_twoFactorProviders[TwoFactorProviderType.Duo]);
+                providers.Add(TwoFactorProviders[TwoFactorProviderType.Duo]);
             }
-            if(TwoFactorProviders.ContainsKey(TwoFactorProviderType.U2f) && _platformUtilsService.SupportsU2f())
+            if(TwoFactorProvidersData.ContainsKey(TwoFactorProviderType.U2f) && _platformUtilsService.SupportsU2f())
             {
-                providers.Add(_twoFactorProviders[TwoFactorProviderType.U2f]);
+                providers.Add(TwoFactorProviders[TwoFactorProviderType.U2f]);
             }
-            if(TwoFactorProviders.ContainsKey(TwoFactorProviderType.Email))
+            if(TwoFactorProvidersData.ContainsKey(TwoFactorProviderType.Email))
             {
-                providers.Add(_twoFactorProviders[TwoFactorProviderType.Email]);
+                providers.Add(TwoFactorProviders[TwoFactorProviderType.Email]);
             }
             return providers;
         }
 
         public TwoFactorProviderType? GetDefaultTwoFactorProvider(bool u2fSupported)
         {
-            if(TwoFactorProviders == null)
+            if(TwoFactorProvidersData == null)
             {
                 return null;
             }
             if(SelectedTwoFactorProviderType != null &&
-                TwoFactorProviders.ContainsKey(SelectedTwoFactorProviderType.Value))
+                TwoFactorProvidersData.ContainsKey(SelectedTwoFactorProviderType.Value))
             {
                 return SelectedTwoFactorProviderType.Value;
             }
             TwoFactorProviderType? providerType = null;
             var providerPriority = -1;
-            foreach(var providerKvp in TwoFactorProviders)
+            foreach(var providerKvp in TwoFactorProvidersData)
             {
-                if(_twoFactorProviders.ContainsKey(providerKvp.Key))
+                if(TwoFactorProviders.ContainsKey(providerKvp.Key))
                 {
-                    var provider = _twoFactorProviders[providerKvp.Key];
+                    var provider = TwoFactorProviders[providerKvp.Key];
                     if(provider.Priority > providerPriority)
                     {
                         if(providerKvp.Key == TwoFactorProviderType.U2f && !u2fSupported)
@@ -274,7 +274,7 @@ namespace Bit.Core.Services
                 Email = email;
                 MasterPasswordHash = hashedPassword;
                 _key = _setCryptoKeys ? key : null;
-                TwoFactorProviders = twoFactorResponse.TwoFactorProviders2;
+                TwoFactorProvidersData = twoFactorResponse.TwoFactorProviders2;
                 result.TwoFactorProviders = twoFactorResponse.TwoFactorProviders2;
                 return result;
             }
@@ -320,7 +320,7 @@ namespace Bit.Core.Services
         {
             Email = null;
             MasterPasswordHash = null;
-            TwoFactorProviders = null;
+            TwoFactorProvidersData = null;
             SelectedTwoFactorProviderType = null;
         }
     }