tls: fix refresh_certs crash when disabled

segfaults server if refresh_certs command is run with TLS compiled in
but not enabled.

1 files changed, 5 insertions, 0 deletions

diff --git a/tls.c b/tls.c
index c440a7e..ae1cb4d 100644
--- a/tls.c
+++ b/tls.c
@@ -94,6 +94,11 @@ static bool load_server_certificates(char **errmsg) {
         *errmsg = NULL;
         return false;
     }
+    if (settings.ssl_ctx == NULL) {
+        snprintf(error_msg, errmax, "Error TLS not enabled\r\n");
+        *errmsg = error_msg;
+        return false;
+    }
     SSL_LOCK();
     if (!SSL_CTX_use_certificate_chain_file(settings.ssl_ctx,
         settings.ssl_chain_cert)) {