allow direct_post.jwt as response_mode (#161)

Signed-off-by: Johannes Tuerk <johannes.tuerk@lissi.id>

Author: JoTiTu

src/WalletFramework.Oid4Vc/Oid4Vp/Models/AuthorizationRequest.cs

@@ -12,6 +12,7 @@ namespace WalletFramework.Oid4Vc.Oid4Vp.Models;
 public record AuthorizationRequest
 {
     private const string DirectPost = "direct_post";
+    private const string DirectPostJwt = "direct_post.jwt";
 
     private const string VpToken = "vp_token";
 
@@ -130,7 +131,7 @@ private static bool IsHaipConform(JObject authorizationRequestJson)
 
         return
             responseType == VpToken
-            && responseMode == DirectPost
+            && responseMode == DirectPost || responseMode == DirectPostJwt
             && !string.IsNullOrEmpty(responseUri)
             && redirectUri is null
             && (clientIdScheme is X509SanDnsScheme or VerifierAttestationScheme
@@ -169,4 +170,4 @@ internal static AuthorizationRequest WithClientMetadata(
         this AuthorizationRequest authorizationRequest,
         ClientMetadata? clientMetadata) 
         => authorizationRequest with { ClientMetadata = clientMetadata };
-}
+}