[PM-5731] feat: scaffold fido2 client

src/Core/Utilities/Fido2/Fido2ClientAuthenticatorAssertionResponse.cs

@@ -0,0 +1,35 @@
+namespace Bit.Core.Utilities.Fido2
+{
+    /// <summary>
+    /// This class represents an authenticator's response to a client's request for generation of a 
+    /// new authentication assertion given the WebAuthn Relying Party's challenge.
+    /// This response contains a cryptographic signature proving possession of the credential private key,
+    /// and optionally evidence of user consent to a specific transaction.
+    /// 
+    /// See: https://www.w3.org/TR/webauthn-2/#iface-authenticatorassertionresponse
+    /// </summary>
+    public class Fido2ClientAuthenticatorAssertionResponse
+    {
+        /// <summary>
+        /// The JSON-compatible serialization of client data passed to the authenticator by the client
+        /// in order to generate this assertion. The exact JSON serialization MUST be preserved, as the
+        /// hash of the serialized client data has been computed over it.
+        /// </summary>
+        public required byte[] ClientDataJSON { get; set; }
+
+        /// <summary>
+        /// The authenticator data returned by the authenticator.
+        /// </summary>
+        public required byte[] AuthenticatorData { get; set; }
+
+        /// <summary>
+        /// Raw signature returned from the authenticator.
+        /// </summary>
+        public required byte[] Signature { get; set; }
+
+        /// <summary>
+        /// The user handle returned from the authenticator, or null if the authenticator did not return a user handle. 
+        /// </summary>
+        public byte[] UserHandle { get; set; } = null;
+    }
+}