From 6df42f0a07e238ad86b8e999165b4ac3e77fab8b Mon Sep 17 00:00:00 2001
From: Bibash Shrestha <bibashshrestha@gmail.com>
Date: Thu, 14 Mar 2024 14:29:31 +0545
Subject: [PATCH] Url encode client metadata for /par post call

---
 lib/oidc4vc/get_authorization_uri_for_issuer.dart |  1 +
 packages/oidc4vc/lib/src/oidc4vc.dart             | 10 +++++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/lib/oidc4vc/get_authorization_uri_for_issuer.dart b/lib/oidc4vc/get_authorization_uri_for_issuer.dart
index 592f1c7fe..18ae3ad4e 100644
--- a/lib/oidc4vc/get_authorization_uri_for_issuer.dart
+++ b/lib/oidc4vc/get_authorization_uri_for_issuer.dart
@@ -84,6 +84,7 @@ Future<void> getAuthorizationUriForIssuer({
     oidc4vciDraftType: oidc4vciDraftType,
     vcFormatType: vcFormatType,
     clientAssertion: clientAssertion,
+    secureAuthorizedFlow: secureAuthorizedFlow,
   );
 
   if (secureAuthorizedFlow) {
diff --git a/packages/oidc4vc/lib/src/oidc4vc.dart b/packages/oidc4vc/lib/src/oidc4vc.dart
index 4ca746975..109ec2a6c 100644
--- a/packages/oidc4vc/lib/src/oidc4vc.dart
+++ b/packages/oidc4vc/lib/src/oidc4vc.dart
@@ -143,6 +143,7 @@ class OIDC4VC {
     required OIDC4VCIDraftType oidc4vciDraftType,
     required VCFormatType vcFormatType,
     required String? clientAssertion,
+    required bool secureAuthorizedFlow,
   }) async {
     try {
       final openIdConfiguration = await getOpenIdConfig(
@@ -174,6 +175,7 @@ class OIDC4VC {
         oidc4vciDraftType: oidc4vciDraftType,
         vcFormatType: vcFormatType,
         clientAssertion: clientAssertion,
+        secureAuthorizedFlow: secureAuthorizedFlow,
       );
 
       return (authorizationEndpoint, authorizationRequestParemeters);
@@ -200,6 +202,7 @@ class OIDC4VC {
     required OIDC4VCIDraftType oidc4vciDraftType,
     required VCFormatType vcFormatType,
     required String? clientAssertion,
+    required bool secureAuthorizedFlow,
   }) {
     //https://openid.net/specs/openid-4-verifiable-credential-issuance-1_0.html#name-successful-authorization-re
 
@@ -317,9 +320,14 @@ class OIDC4VC {
       'nonce': nonce,
       'code_challenge': codeChallenge,
       'code_challenge_method': 'S256',
-      'client_metadata': jsonEncode(clientMetaData),
     };
 
+    if (secureAuthorizedFlow) {
+      myRequest['client_metadata'] =
+          Uri.encodeComponent(jsonEncode(clientMetaData));
+    } else {
+      myRequest['client_metadata'] = jsonEncode(clientMetaData);
+    }
     switch (clientAuthentication) {
       case ClientAuthentication.none:
         break;