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/************************************************************************************
Copyright (C) 2014,2015,2018 MariaDB Corporation AB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not see <http://www.gnu.org/licenses>
or write to the Free Software Foundation, Inc.,
51 Franklin St., Fifth Floor, Boston, MA 02110, USA
*************************************************************************************/
#include <ma_global.h>
#include <mysql.h>
#include <mysql/client_plugin.h>
#include <string.h>
#include <memory.h>
#include <errmsg.h>
/* function prototypes */
static int auth_old_password(MYSQL_PLUGIN_VIO *vio, MYSQL *mysql);
typedef struct st_mysql_client_plugin_AUTHENTICATION auth_plugin_t;
typedef struct {
int (*read_packet)(struct st_plugin_vio *vio, uchar **buf);
int (*write_packet)(struct st_plugin_vio *vio, const uchar *pkt, size_t pkt_len);
void (*info)(struct st_plugin_vio *vio, struct st_plugin_vio_info *info);
/* -= end of MYSQL_PLUGIN_VIO =- */
MYSQL *mysql;
auth_plugin_t *plugin; /**< what plugin we're under */
const char *db;
struct {
uchar *pkt; /**< pointer into NET::buff */
uint pkt_len;
} cached_server_reply;
uint packets_read, packets_written; /**< counters for send/received packets */
my_bool mysql_change_user; /**< if it's mysql_change_user() */
int last_read_packet_len; /**< the length of the last *read* packet */
} MCPVIO_EXT;
#ifndef PLUGIN_DYNAMIC
struct st_mysql_client_plugin_AUTHENTICATION mysql_old_password_client_plugin=
#else
struct st_mysql_client_plugin_AUTHENTICATION _mysql_client_plugin_declaration_ =
#endif
{
MYSQL_CLIENT_AUTHENTICATION_PLUGIN,
MYSQL_CLIENT_AUTHENTICATION_PLUGIN_INTERFACE_VERSION,
"mysql_old_password",
"Sergei Golubchik, R.J. Silk, Georg Richter",
"Old (pre 4.1) authentication plugin",
{1,0,0},
"LGPL",
NULL,
NULL,
NULL,
NULL,
auth_old_password
};
/**
client authentication plugin that does old MySQL authentication
using an 8-byte (4.0-) scramble
*/
static int auth_old_password(MYSQL_PLUGIN_VIO *vio, MYSQL *mysql)
{
uchar *pkt;
int pkt_len;
if (((MCPVIO_EXT *)vio)->mysql_change_user)
{
/*
in mysql_change_user() the client sends the first packet.
we use the old scramble.
*/
pkt= (uchar*)mysql->scramble_buff;
}
else
{
/* read the scramble */
if ((pkt_len= vio->read_packet(vio, &pkt)) < 0)
return CR_ERROR;
if (pkt_len != SCRAMBLE_LENGTH_323 + 1 &&
pkt_len != SCRAMBLE_LENGTH + 1)
return CR_SERVER_HANDSHAKE_ERR;
/* save it in MYSQL */
memmove(mysql->scramble_buff, pkt, pkt_len - 1);
mysql->scramble_buff[pkt_len - 1] = 0;
}
if (mysql && mysql->passwd[0])
{
char scrambled[SCRAMBLE_LENGTH_323 + 1];
ma_scramble_323(scrambled, (char*)pkt, mysql->passwd);
if (vio->write_packet(vio, (uchar*)scrambled, SCRAMBLE_LENGTH_323 + 1))
return CR_ERROR;
}
else
if (vio->write_packet(vio, 0, 0)) /* no password */
return CR_ERROR;
return CR_OK;
}
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