[PM-4167] Add PRF attestation flow during passkey registration (#3339)

* [PM-4167] feat: add support for `SupportsPrf`

* [PM-4167] feat: add `prfStatus` property

* [PM-4167] feat: add support for storing PRF keys

* [PM-4167] fix: allow credentials to be created without encryption support

* [PM-4167] fix: broken test

* [PM-4167] chore: remove whitespace

* [PM-4167] fix: controller test

* [PM-4167] chore: improve readability of `GetPrfStatus`

* [PM-4167] fix: make prf optional

* [PM-4167] fix: commit missing controller change

* [PM-4167] fix: tests

src/Core/Auth/Entities/WebAuthnCredential.cs

@@ -1,4 +1,5 @@
 using System.ComponentModel.DataAnnotations;
+using Bit.Core.Auth.Enums;
 using Bit.Core.Entities;
 using Bit.Core.Utilities;
 
@@ -18,8 +19,11 @@ public class WebAuthnCredential : ITableObject<Guid>
     [MaxLength(20)]
     public string Type { get; set; }
     public Guid AaGuid { get; set; }
+    [MaxLength(2000)]
     public string EncryptedUserKey { get; set; }
+    [MaxLength(2000)]
     public string EncryptedPrivateKey { get; set; }
+    [MaxLength(2000)]
     public string EncryptedPublicKey { get; set; }
     public bool SupportsPrf { get; set; }
     public DateTime CreationDate { get; internal set; } = DateTime.UtcNow;
@@ -29,4 +33,19 @@ public class WebAuthnCredential : ITableObject<Guid>
     {
         Id = CoreHelpers.GenerateComb();
     }
+
+    public WebAuthnPrfStatus GetPrfStatus()
+    {
+        if (!SupportsPrf)
+        {
+            return WebAuthnPrfStatus.Unsupported;
+        }
+
+        if (EncryptedUserKey != null && EncryptedPrivateKey != null && EncryptedPublicKey != null)
+        {
+            return WebAuthnPrfStatus.Enabled;
+        }
+
+        return WebAuthnPrfStatus.Supported;
+    }
 }

src/Core/Auth/Enums/WebAuthnPrfStatus.cs

@@ -0,0 +1,8 @@
+namespace Bit.Core.Auth.Enums;
+
+public enum WebAuthnPrfStatus
+{
+    Enabled = 0,
+    Supported = 1,
+    Unsupported = 2
+}