PM-5154 Added Fido2AuthenticationService to provide us a wrapper for the actual implementation

src/Core/Abstractions/IFido2AuthenticationService.cs

@@ -0,0 +1,9 @@
+using Bit.Core.Utilities.Fido2;
+
+namespace Bit.Core.Abstractions
+{
+    public interface IFido2AuthenticationService
+    {
+        Task<Fido2AuthenticatorGetAssertionResult> GetAssertionAsync(Fido2AuthenticatorGetAssertionParams assertionParams);
+    }
+}

src/Core/Core.csproj

@@ -73,6 +73,7 @@
     <Folder Include="Utilities\Automation\" />
     <Folder Include="Utilities\Prompts\" />
     <Folder Include="Resources\Localization\" />
+    <Folder Include="Utilities\Fido2\" />
   </ItemGroup>
 	<ItemGroup>
 	  <MauiImage Include="Resources\Images\dotnet_bot.svg">
@@ -100,4 +101,7 @@
 	    <Generator>MSBuild:Compile</Generator>
 	  </MauiXaml>
 	</ItemGroup>
+	<ItemGroup>
+	  <None Remove="Utilities\Fido2\" />
+	</ItemGroup>
 </Project>

src/Core/Services/Fido2AuthenticationService.cs

@@ -0,0 +1,18 @@
+using Bit.Core.Abstractions;
+using Bit.Core.Utilities.Fido2;
+
+namespace Bit.Core.Services
+{
+    public class Fido2AuthenticationService : IFido2AuthenticationService
+    {
+        public Task<Fido2AuthenticatorGetAssertionResult> GetAssertionAsync(Fido2AuthenticatorGetAssertionParams assertionParams)
+        {
+            // TODO: IMPLEMENT this
+            return Task.FromResult(new Fido2AuthenticatorGetAssertionResult
+            {
+                AuthenticatorData = new byte[32],
+                Signature = new byte[8]
+            });
+        }
+    }
+}

src/Core/Utilities/Fido2/Fido2AuthenticatorGetAssertionParams.cs

@@ -0,0 +1,12 @@
+namespace Bit.Core.Utilities.Fido2
+{
+    public class Fido2AuthenticatorGetAssertionParams
+    {
+        public string RpId { get; set; }
+
+        public string CredentialId { get; set; }
+
+        public string Counter { get; set; }
+    }
+}
+

src/Core/Utilities/Fido2/Fido2AuthenticatorGetAssertionResult.cs

@@ -0,0 +1,11 @@
+using System;
+namespace Bit.Core.Utilities.Fido2
+{
+    public class Fido2AuthenticatorGetAssertionResult
+    {
+        public byte[] AuthenticatorData { get; set; }
+
+        public byte[] Signature { get; set; }
+    }
+}
+

src/Core/Utilities/ServiceContainer.cs

@@ -1,9 +1,6 @@
-using System;
-using System.Collections.Concurrent;
-using System.Collections.Generic;
+using System.Collections.Concurrent;
 using System.Globalization;
 using System.Text;
-using System.Threading.Tasks;
 using Bit.Core.Abstractions;
 using Bit.Core.Services;
 
@@ -118,6 +115,7 @@ namespace Bit.Core.Utilities
             Register<IUsernameGenerationService>(usernameGenerationService);
             Register<IDeviceTrustCryptoService>(deviceTrustCryptoService);
             Register<IPasswordResetEnrollmentService>(passwordResetEnrollmentService);
+            Register<IFido2AuthenticationService>(new Fido2AuthenticationService());
         }
 
         public static void Register<T>(string serviceName, T obj)

src/iOS.Autofill/CredentialProviderViewController.Passkeys.cs

@@ -25,7 +25,7 @@ namespace Bit.iOS.Autofill
             await ProvideCredentialAsync(false);
         }
 
-        public void CompleteAssertionRequest(CipherView cipherView)
+        public async Task CompleteAssertionRequestAsync(CipherView cipherView)
         {
             if (!UIDevice.CurrentDevice.CheckSystemVersion(17, 0))
             {
@@ -34,12 +34,19 @@ namespace Bit.iOS.Autofill
             }
 
             // TODO: Generate the credential Signature and Auth data accordingly
+            var fido2AssertionResult = await _fido2AuthService.Value.GetAssertionAsync(new Bit.Core.Utilities.Fido2.Fido2AuthenticatorGetAssertionParams
+            {
+                RpId = cipherView.Login.MainFido2Credential.RpId,
+                Counter = cipherView.Login.MainFido2Credential.Counter,
+                CredentialId = cipherView.Login.MainFido2Credential.CredentialId
+            });
+
             CompleteAssertionRequest(new ASPasskeyAssertionCredential(
                 cipherView.Login.MainFido2Credential.UserHandle,
                 cipherView.Login.MainFido2Credential.RpId,
-                "TODO: Generate Signature",
+                NSData.FromArray(fido2AssertionResult.Signature),
                 _context.PasskeyCredentialRequest?.ClientDataHash,
-                "TODO: Generate Authenticator Data",
+                NSData.FromArray(fido2AssertionResult.AuthenticatorData),
                 cipherView.Login.MainFido2Credential.CredentialId
             ));
         }

src/iOS.Autofill/CredentialProviderViewController.cs

@@ -29,6 +29,7 @@ namespace Bit.iOS.Autofill
         private IAccountsManager _accountsManager;
 
         private readonly LazyResolve<IStateService> _stateService = new LazyResolve<IStateService>();
+        private readonly LazyResolve<IFido2AuthenticationService> _fido2AuthService = new LazyResolve<IFido2AuthenticationService>();
 
         public CredentialProviderViewController(IntPtr handle)
             : base(handle)
@@ -411,7 +412,7 @@ namespace Bit.iOS.Autofill
 
                 if (_context.IsPasskey)
                 {
-                    CompleteAssertionRequest(decCipher);
+                    await CompleteAssertionRequestAsync(decCipher);
                     return;
                 }