From ca103b361028529d637e9d25da355dd9f88874bc Mon Sep 17 00:00:00 2001
From: Jon Shallow <supjps-libcoap@jpshallow.com>
Date: Tue, 29 Apr 2025 15:00:29 +0100
Subject: [PATCH] coap_openssl.c: Fix cert chain usage for OpenSSL >= 3.0.0

---
 src/coap_openssl.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/coap_openssl.c b/src/coap_openssl.c
index affcbce0..f15d7af7 100644
--- a/src/coap_openssl.c
+++ b/src/coap_openssl.c
@@ -1669,8 +1669,8 @@ setup_pki_server(SSL_CTX *ctx,
       key.key.define.public_cert.u_byte[0]) {
     switch (key.key.define.public_cert_def) {
     case COAP_PKI_KEY_DEF_PEM: /* define public cert */
-      if (key.key.define.public_cert.u_byte &&
-          key.key.define.public_cert.u_byte[0]) {
+      if (key.key.define.ca.u_byte &&
+          key.key.define.ca.u_byte[0]) {
         if (!(SSL_use_certificate_file(ssl,
                                        key.key.define.public_cert.s_byte,
                                        SSL_FILETYPE_PEM))) {