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/* Copyright (c) 2017, MariaDB Corporation.
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; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA */
#include <my_global.h>
#include <mysqld.h>
#include <mysql.h>
#include <xtrabackup.h>
#include <encryption_plugin.h>
#include <backup_copy.h>
#include <sql_plugin.h>
#include <sstream>
#include <vector>
#include <common.h>
#include <backup_mysql.h>
#include <log0crypt.h>
extern struct st_maria_plugin *mysql_optional_plugins[];
extern struct st_maria_plugin *mysql_mandatory_plugins[];
static void encryption_plugin_init(int argc, char **argv);
extern char *xb_plugin_load;
extern char *xb_plugin_dir;
const int PLUGIN_MAX_ARGS = 1024;
std::vector<std::string> backup_plugins_args;
const char *QUERY_PLUGIN =
"SELECT plugin_name, plugin_library, @@plugin_dir"
" FROM information_schema.plugins WHERE plugin_type='ENCRYPTION'"
" AND plugin_status='ACTIVE'";
std::string encryption_plugin_config;
static void add_to_plugin_load_list(const char *plugin_def)
{
opt_plugin_load_list_ptr->push_back(new i_string(plugin_def));
}
static char XTRABACKUP_EXE[] = "xtrabackup";
void encryption_plugin_backup_init(MYSQL *mysql)
{
MYSQL_RES *result;
MYSQL_ROW row;
std::ostringstream oss;
char *argv[PLUGIN_MAX_ARGS];
int argc;
result = xb_mysql_query(mysql, QUERY_PLUGIN, true, true);
row = mysql_fetch_row(result);
if (!row)
{
mysql_free_result(result);
return;
}
char *name= row[0];
char *library= row[1];
char *dir= row[2];
#ifdef _WIN32
for (char *p = dir; *p; p++)
if (*p == '\\') *p = '/';
#endif
std::string plugin_load(name);
if (library)
plugin_load += std::string("=") + library;
oss << "plugin_load=" << plugin_load << std::endl;
/* Required to load the plugin later.*/
add_to_plugin_load_list(plugin_load.c_str());
strncpy(opt_plugin_dir, dir, FN_REFLEN);
oss << "plugin_dir=" << '"' << dir << '"' << std::endl;
/* Read plugin variables. */
char query[1024];
snprintf(query, 1024, "SHOW variables like '%s_%%'", name);
mysql_free_result(result);
result = xb_mysql_query(mysql, query, true, true);
while ((row = mysql_fetch_row(result)))
{
std::string arg("--");
arg += row[0];
arg += "=";
arg += row[1];
backup_plugins_args.push_back(arg);
oss << row[0] << "=" << row[1] << std::endl;
}
mysql_free_result(result);
/* Check whether to encrypt logs. */
result = xb_mysql_query(mysql, "select @@innodb_encrypt_log", true, true);
row = mysql_fetch_row(result);
srv_encrypt_log = (row != 0 && row[0][0] == '1');
oss << "innodb_encrypt_log=" << row[0] << std::endl;
mysql_free_result(result);
encryption_plugin_config = oss.str();
argc = 0;
argv[argc++] = XTRABACKUP_EXE;
for(size_t i = 0; i < backup_plugins_args.size(); i++)
{
argv[argc++] = (char *)backup_plugins_args[i].c_str();
if (argc == PLUGIN_MAX_ARGS - 2)
break;
}
argv[argc] = 0;
encryption_plugin_init(argc, argv);
}
const char *encryption_plugin_get_config()
{
return encryption_plugin_config.c_str();
}
extern int finalize_encryption_plugin(st_plugin_int *plugin);
void encryption_plugin_prepare_init(int argc, char **argv)
{
if (!xb_plugin_load)
{
finalize_encryption_plugin(0);
return;
}
add_to_plugin_load_list(xb_plugin_load);
if (xb_plugin_dir)
strncpy(opt_plugin_dir, xb_plugin_dir, FN_REFLEN);
char **new_argv = new char *[argc + 1];
new_argv[0] = XTRABACKUP_EXE;
memcpy(&new_argv[1], argv, argc*sizeof(char *));
encryption_plugin_init(argc+1, new_argv);
delete[] new_argv;
}
static void encryption_plugin_init(int argc, char **argv)
{
/* Patch optional and mandatory plugins, we only need to load the one in xb_plugin_load. */
mysql_optional_plugins[0] = mysql_mandatory_plugins[0] = 0;
msg("Loading encryption plugin\n");
for (int i= 1; i < argc; i++)
msg("\t Encryption plugin parameter : '%s'\n", argv[i]);
plugin_init(&argc, argv, PLUGIN_INIT_SKIP_PLUGIN_TABLE);
}
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