--- lbbs/src/database.c	2025/07/02 04:17:33	1.17
+++ lbbs/src/database.c	2026/01/03 10:27:14	1.29
@@ -1,55 +1,100 @@
-/***************************************************************************
-						 database.c  -  description
-							 -------------------
-	Copyright            : (C) 2004-2025 by Leaflet
-	Email                : leaflet@leafok.com
- ***************************************************************************/
-
-/***************************************************************************
- *                                                                         *
- *   This program is free software; you can redistribute it and/or modify  *
- *   it under the terms of the GNU General Public License as published by  *
- *   the Free Software Foundation; either version 3 of the License, or     *
- *   (at your option) any later version.                                   *
- *                                                                         *
- ***************************************************************************/
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * database
+ *   - configuration and function of DB connection
+ *
+ * Copyright (C) 2004-2026  Leaflet <leaflet@leafok.com>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
 
 #include "common.h"
 #include "database.h"
 #include "log.h"
+#include <errno.h>
+#include <fcntl.h>
+#include <mysql.h>
 #include <stdio.h>
-#include <mysql/mysql.h>
+#include <string.h>
+#include <sys/stat.h>
 
 // Global declaration for database
-char DB_host[256];
-char DB_username[50];
-char DB_password[50];
-char DB_database[50];
-char DB_timezone[50];
+char DB_ca_cert[FILE_PATH_LEN] = "conf/ca_cert.pem";
+char DB_host[DB_host_max_len + 1];
+char DB_username[DB_username_max_len + 1];
+char DB_password[DB_password_max_len + 1];
+char DB_database[DB_database_max_len + 1];
+char DB_timezone[DB_timezone_max_len + 1];
 
 MYSQL *db_open()
 {
 	MYSQL *db = NULL;
+#ifdef HAVE_MARIADB_CLIENT
+	my_bool verify_server_cert = 0;
+#else
+	unsigned int ssl_mode = SSL_MODE_PREFERRED;
+#endif
 	char sql[SQL_BUFFER_LEN];
+	int fd;
+	int have_ca_cert = 0;
 
 	db = mysql_init(NULL);
 	if (db == NULL)
 	{
-		log_error("mysql_init() failed\n");
+		log_error("mysql_init() failed");
 		return NULL;
 	}
 
+	fd = open(DB_ca_cert, O_RDONLY);
+	if (fd == -1)
+	{
+		if (errno != ENOENT)
+		{
+			log_error("open(%s) error: %d", DB_ca_cert, errno);
+		}
+	}
+	else
+	{
+		close(fd);
+		have_ca_cert = 1;
+#ifndef HAVE_MARIADB_CLIENT
+		ssl_mode = SSL_MODE_VERIFY_CA;
+#endif
+	}
+
+	if (mysql_ssl_set(db, NULL, NULL, (have_ca_cert ? DB_ca_cert : NULL), NULL, NULL) != 0)
+	{
+		log_error("mysql_ssl_set() error");
+		return NULL;
+	}
+
+#ifdef HAVE_MARIADB_CLIENT
+	if (mysql_optionsv(db, MYSQL_OPT_SSL_VERIFY_SERVER_CERT, &verify_server_cert) != 0)
+	{
+		log_error("mysql_optionsv() error");
+		return NULL;
+	}
+#else
+	if (mysql_options(db, MYSQL_OPT_SSL_MODE, &ssl_mode) != 0)
+	{
+		log_error("mysql_options() error");
+		return NULL;
+	}
+#endif
+
 	if (mysql_real_connect(db, DB_host, DB_username, DB_password, DB_database,
 						   0, NULL, 0) == NULL)
 	{
-		log_error("mysql_real_connect() error: %s\n", mysql_error(db));
+		log_error("mysql_real_connect() error: %s", mysql_error(db));
 		mysql_close(db);
 		return NULL;
 	}
 
 	if (mysql_set_character_set(db, "utf8") != 0)
 	{
-		log_error("Set character set error: %s\n", mysql_error(db));
+		log_error("Set character set error: %s", mysql_error(db));
 		mysql_close(db);
 		return NULL;
 	}
@@ -60,7 +105,7 @@ MYSQL *db_open()
 
 	if (mysql_query(db, sql) != 0)
 	{
-		log_error("Set timezone error: %s\n", mysql_error(db));
+		log_error("Set timezone error: %s", mysql_error(db));
 		mysql_close(db);
 		return NULL;
 	}