From f3aac373363a5dd50a32cb9136196ae4292dd0fc Mon Sep 17 00:00:00 2001
From: Jan Romann <jan.romann@hs-emden-leer.de>
Date: Fri, 6 Dec 2024 15:51:30 +0100
Subject: [PATCH] feat(binding_coap): add support for PEM root certificates

---
 lib/binding_coap.dart                 | 3 +++
 lib/src/binding_coap/coap_client.dart | 3 +--
 lib/src/binding_coap/coap_config.dart | 5 ++---
 pubspec.yaml                          | 6 ++++++
 4 files changed, 12 insertions(+), 5 deletions(-)

diff --git a/lib/binding_coap.dart b/lib/binding_coap.dart
index f2b33fb7..5bbb288c 100644
--- a/lib/binding_coap.dart
+++ b/lib/binding_coap.dart
@@ -10,6 +10,9 @@
 /// [spec link]: https://www.w3.org/TR/wot-binding-templates/
 library binding_coap;
 
+export "package:coap/coap.dart"
+    show Certificate, DerCertificate, PemCertificate;
+
 export "src/binding_coap/coap_client_factory.dart";
 export "src/binding_coap/coap_config.dart";
 export "src/binding_coap/coap_server.dart";
diff --git a/lib/src/binding_coap/coap_client.dart b/lib/src/binding_coap/coap_client.dart
index 1900cb21..8da3cf51 100644
--- a/lib/src/binding_coap/coap_client.dart
+++ b/lib/src/binding_coap/coap_client.dart
@@ -5,7 +5,6 @@
 // SPDX-License-Identifier: BSD-3-Clause
 
 import "dart:async";
-import "dart:typed_data";
 
 import "package:coap/coap.dart" as coap;
 import "package:coap/config/coap_config_default.dart";
@@ -41,7 +40,7 @@ class _InternalCoapConfig extends CoapConfigDefault {
   final bool dtlsWithTrustedRoots;
 
   @override
-  final List<Uint8List> rootCertificates;
+  final List<coap.Certificate> rootCertificates;
 }
 
 coap.PskCredentialsCallback? _createPskCallback(
diff --git a/lib/src/binding_coap/coap_config.dart b/lib/src/binding_coap/coap_config.dart
index 462c906d..cef0b957 100644
--- a/lib/src/binding_coap/coap_config.dart
+++ b/lib/src/binding_coap/coap_config.dart
@@ -4,8 +4,7 @@
 //
 // SPDX-License-Identifier: BSD-3-Clause
 
-import "dart:typed_data";
-
+import "package:coap/coap.dart";
 import "package:meta/meta.dart";
 
 /// Allows for configuring the behavior of CoAP clients and servers.
@@ -34,7 +33,7 @@ class CoapConfig {
   final String? dtlsCiphers;
 
   /// List of custom root certificates to use with OpenSSL.
-  final List<Uint8List> rootCertificates;
+  final List<Certificate> rootCertificates;
 
   /// The port number used by a client or server. Defaults to 5683.
   final int port;
diff --git a/pubspec.yaml b/pubspec.yaml
index 4e67b4bb..9c50de55 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -31,3 +31,9 @@ dependencies:
   typed_data: ^1.3.2
   uri: ^1.0.0
   uuid: ^4.2.1
+
+dependency_overrides:
+  coap:
+    git:
+      url: https://github.com/namib-project/coap
+      ref: dtls2-security-level