[PM-5731] feat: start implementing attestation

src/Core/Services/Fido2AuthenticatorService.cs

@@ -23,6 +23,20 @@ namespace Bit.Core.Services
             _userInterface = userInterface;
         }
 
+        public Task<Fido2AuthenticatorMakeCredentialResult> MakeCredentialAsync(Fido2AuthenticatorMakeCredentialParams makeCredentialParams) 
+        {
+            if (makeCredentialParams.CredTypesAndPubKeyAlgs.All((p) => p.Algorithm != (int) Fido2AlgorithmIdentifier.ES256))
+            {
+                var requestedAlgorithms = string.Join(", ", makeCredentialParams.CredTypesAndPubKeyAlgs.Select((p) => p.Algorithm).ToArray());
+                _logService.Warning(
+                    $"[Fido2Authenticator] No compatible algorithms found, RP requested: {requestedAlgorithms}"
+                );
+                throw new NotSupportedError();
+            }
+
+            throw new NotImplementedException();
+        }
+        
         public async Task<Fido2AuthenticatorGetAssertionResult> GetAssertionAsync(Fido2AuthenticatorGetAssertionParams assertionParams)
         {
             List<CipherView> cipherOptions;
@@ -116,10 +130,6 @@ namespace Bit.Core.Services
             }
         }
 
-        public Task<Fido2AuthenticatorMakeCredentialResult> MakeCredentialAsync(Fido2AuthenticatorMakeCredentialParams makeCredentialParams) {
-            throw new NotImplementedException();
-        }
-
         private async Task<List<CipherView>> FindCredentialsById(PublicKeyCredentialDescriptor[] credentials, string rpId)
         {
             var ids = new List<string>();

src/Core/Utilities/Fido2/Fido2AlgorithmIdentifier.cs

@@ -0,0 +1,6 @@
+namespace Bit.Core.Utilities.Fido2 {
+    public enum Fido2AlgorithmIdentifier : int {
+        ES256 = -7,
+        RS256 = -257,
+    }
+}

src/Core/Utilities/Fido2/Fido2AuthenticatorException.cs

@@ -14,6 +14,13 @@ namespace Bit.Core.Utilities.Fido2
         }
     }
 
+    public class NotSupportedError : Fido2AuthenticatorException
+    {
+        public NotSupportedError() : base("NotSupportedError")
+        {
+        }
+    }
+
     public class UnknownError : Fido2AuthenticatorException
     {
         public UnknownError() : base("UnknownError")

src/Core/Utilities/Fido2/Fido2AuthenticatorMakeCredentialParams.cs

@@ -20,7 +20,7 @@ namespace Bit.Core.Utilities.Fido2
         ///<summary>
         /// A sequence of pairs of PublicKeyCredentialType and public key algorithms (COSEAlgorithmIdentifier) requested by the Relying Party. This sequence is ordered from most preferred to least preferred. The authenticator makes a best-effort to create the most preferred credential that it can. */
         ///</summary>
-        public PublicKeyCredentialDescriptor[] CredTypesAndPubKeyAlgs { get; set; }
+        public PublicKeyCredentialAlgorithmDescriptor[] CredTypesAndPubKeyAlgs { get; set; }
 
         ///<summary>
         /// The effective resident key requirement for credential creation, a Boolean value determined by the client. Resident is synonymous with discoverable. */

src/Core/Utilities/Fido2/PublicKeyCredentialAlgorithmDescriptor.cs

@@ -0,0 +1,9 @@
+namespace Bit.Core.Utilities.Fido2
+{
+    public class PublicKeyCredentialAlgorithmDescriptor {
+        public byte[] Id {get; set;}
+        public string[] Transports;
+        public string Type;
+        public int Algorithm;
+    }
+}

test/Core.Test/Services/Fido2AuthenticatorGetAssertionTests.cs

@@ -19,7 +19,7 @@ using System.Linq;
 
 namespace Bit.Core.Test.Services
 {
-    public class Fido2AuthenticatorTests
+    public class Fido2AuthenticatorGetAssertionTests
     {
         #region missing non-discoverable credential
 

test/Core.Test/Services/Fido2AuthenticatorMakeCredentialTests.cs

@@ -0,0 +1,89 @@
+using System;
+using System.Threading.Tasks;
+using Bit.Core.Abstractions;
+using Bit.Core.Exceptions;
+using Bit.Core.Services;
+using Bit.Core.Models.Domain;
+using Bit.Core.Models.View;
+using Bit.Core.Enums;
+using Bit.Core.Test.AutoFixture;
+using Bit.Core.Utilities.Fido2;
+using Bit.Test.Common.AutoFixture;
+using Bit.Test.Common.AutoFixture.Attributes;
+using NSubstitute;
+using NSubstitute.ExceptionExtensions;
+using Xunit;
+using Bit.Core.Utilities;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Bit.Core.Test.Services
+{
+    public class Fido2AuthenticatorMakeCredentialTests
+    {
+        #region missing non-discoverable credential
+
+        // Spec: If credentialOptions is now empty, return an error code equivalent to "NotAllowedError" and terminate the operation.
+        [Theory]
+        [InlineCustomAutoData(new[] { typeof(SutProviderCustomization) })]
+        public async Task GetAssertionAsync_ThrowsNotSupported_NoSupportedAlgorithm(SutProvider<Fido2AuthenticatorService> sutProvider, Fido2AuthenticatorMakeCredentialParams mParams)
+        {
+            mParams.CredTypesAndPubKeyAlgs = [
+                new PublicKeyCredentialAlgorithmDescriptor {
+                    Type = "public-key",
+                    Algorithm = -257 // RS256 which we do not support
+                }
+            ];
+
+            await Assert.ThrowsAsync<NotSupportedError>(() => sutProvider.Sut.MakeCredentialAsync(mParams));
+        }
+
+        // [Theory]
+        // [InlineCustomAutoData(new[] { typeof(SutProviderCustomization) })]
+        // public async Task GetAssertionAsync_Throws_CredentialExistsButRpIdDoesNotMatch(SutProvider<Fido2AuthenticatorService> sutProvider, Fido2AuthenticatorGetAssertionParams aParams)
+        // {
+        //     var credentialId = Guid.NewGuid();
+        //     aParams.RpId = "bitwarden.com";
+        //     aParams.AllowCredentialDescriptorList = [
+        //         new PublicKeyCredentialDescriptor {
+        //             Id = credentialId.ToByteArray(),
+        //             Type = "public-key"
+        //         }
+        //     ];
+        //     sutProvider.GetDependency<ICipherService>().GetAllDecryptedAsync().Returns([
+        //         CreateCipherView(credentialId.ToString(), "mismatch-rpid", false),
+        //     ]);
+
+        //     await Assert.ThrowsAsync<NotAllowedError>(() => sutProvider.Sut.GetAssertionAsync(aParams));
+        // }
+
+        #endregion
+
+        private byte[] RandomBytes(int length)
+        {
+            var bytes = new byte[length];
+            new Random().NextBytes(bytes);
+            return bytes;
+        }
+
+        #nullable enable
+        private CipherView CreateCipherView(string? credentialId, string? rpId, bool? discoverable)
+        {
+            return new CipherView {
+                Type = CipherType.Login,
+                Id = Guid.NewGuid().ToString(),
+                Reprompt = CipherRepromptType.None,
+                Login = new LoginView {
+                    Fido2Credentials = new List<Fido2CredentialView> {
+                        new Fido2CredentialView {
+                            CredentialId = credentialId ?? Guid.NewGuid().ToString(),
+                            RpId = rpId ?? "bitwarden.com",
+                            Discoverable = discoverable.HasValue ? discoverable.ToString() : "true",
+                            UserHandleValue = RandomBytes(32),
+                        }
+                    }
+                }
+            };
+        }
+    }
+}