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https://github.com/VCMP-SqMod/SqMod.git
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118 lines
3.6 KiB
C
118 lines
3.6 KiB
C
/************************************************************************************
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Copyright (C) 2014,2015,2018 MariaDB Corporation AB
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not see <http://www.gnu.org/licenses>
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or write to the Free Software Foundation, Inc.,
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51 Franklin St., Fifth Floor, Boston, MA 02110, USA
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*************************************************************************************/
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#include <ma_global.h>
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#include <mysql.h>
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#include <mysql/client_plugin.h>
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#include <string.h>
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#include <memory.h>
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#include <errmsg.h>
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/* function prototypes */
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static int auth_old_password(MYSQL_PLUGIN_VIO *vio, MYSQL *mysql);
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typedef struct st_mysql_client_plugin_AUTHENTICATION auth_plugin_t;
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typedef struct {
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int (*read_packet)(struct st_plugin_vio *vio, uchar **buf);
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int (*write_packet)(struct st_plugin_vio *vio, const uchar *pkt, size_t pkt_len);
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void (*info)(struct st_plugin_vio *vio, struct st_plugin_vio_info *info);
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/* -= end of MYSQL_PLUGIN_VIO =- */
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MYSQL *mysql;
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auth_plugin_t *plugin; /**< what plugin we're under */
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const char *db;
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struct {
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uchar *pkt; /**< pointer into NET::buff */
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uint pkt_len;
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} cached_server_reply;
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uint packets_read, packets_written; /**< counters for send/received packets */
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my_bool mysql_change_user; /**< if it's mysql_change_user() */
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int last_read_packet_len; /**< the length of the last *read* packet */
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} MCPVIO_EXT;
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#ifndef PLUGIN_DYNAMIC
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struct st_mysql_client_plugin_AUTHENTICATION mysql_old_password_client_plugin=
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#else
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struct st_mysql_client_plugin_AUTHENTICATION _mysql_client_plugin_declaration_ =
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#endif
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{
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MYSQL_CLIENT_AUTHENTICATION_PLUGIN,
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MYSQL_CLIENT_AUTHENTICATION_PLUGIN_INTERFACE_VERSION,
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"mysql_old_password",
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"Sergei Golubchik, R.J. Silk, Georg Richter",
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"Old (pre 4.1) authentication plugin",
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{1,0,0},
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"LGPL",
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NULL,
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NULL,
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NULL,
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NULL,
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auth_old_password
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};
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/**
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client authentication plugin that does old MySQL authentication
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using an 8-byte (4.0-) scramble
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*/
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static int auth_old_password(MYSQL_PLUGIN_VIO *vio, MYSQL *mysql)
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{
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uchar *pkt;
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int pkt_len;
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if (((MCPVIO_EXT *)vio)->mysql_change_user)
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{
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/*
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in mysql_change_user() the client sends the first packet.
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we use the old scramble.
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*/
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pkt= (uchar*)mysql->scramble_buff;
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}
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else
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{
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/* read the scramble */
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if ((pkt_len= vio->read_packet(vio, &pkt)) < 0)
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return CR_ERROR;
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if (pkt_len != SCRAMBLE_LENGTH_323 + 1 &&
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pkt_len != SCRAMBLE_LENGTH + 1)
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return CR_SERVER_HANDSHAKE_ERR;
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/* save it in MYSQL */
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memmove(mysql->scramble_buff, pkt, pkt_len - 1);
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mysql->scramble_buff[pkt_len - 1] = 0;
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}
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if (mysql && mysql->passwd[0])
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{
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char scrambled[SCRAMBLE_LENGTH_323 + 1];
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ma_scramble_323(scrambled, (char*)pkt, mysql->passwd);
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if (vio->write_packet(vio, (uchar*)scrambled, SCRAMBLE_LENGTH_323 + 1))
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return CR_ERROR;
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}
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else
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if (vio->write_packet(vio, 0, 0)) /* no password */
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return CR_ERROR;
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return CR_OK;
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}
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