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#ifndef SQL_AUDIT_INCLUDED
#define SQL_AUDIT_INCLUDED
/* Copyright (c) 2007, 2013, Oracle and/or its affiliates. All rights reserved.
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 St, Fifth Floor, Boston, MA 02110-1335 USA */
#include <mysql/plugin_audit.h>
#include "sql_class.h"
extern unsigned long mysql_global_audit_mask[];
extern void mysql_audit_initialize();
extern void mysql_audit_finalize();
extern void mysql_audit_init_thd(THD *thd);
extern void mysql_audit_free_thd(THD *thd);
extern void mysql_audit_acquire_plugins(THD *thd, ulong *event_class_mask);
#ifndef EMBEDDED_LIBRARY
extern void mysql_audit_notify(THD *thd, uint event_class, const void *event);
static inline bool mysql_audit_general_enabled()
{
return mysql_global_audit_mask[0] & MYSQL_AUDIT_GENERAL_CLASSMASK;
}
static inline bool mysql_audit_connection_enabled()
{
return mysql_global_audit_mask[0] & MYSQL_AUDIT_CONNECTION_CLASSMASK;
}
static inline bool mysql_audit_table_enabled()
{
return mysql_global_audit_mask[0] & MYSQL_AUDIT_TABLE_CLASSMASK;
}
#else
static inline void mysql_audit_notify(THD *thd, uint event_class,
const void *event) {}
#define mysql_audit_general_enabled() 0
#define mysql_audit_connection_enabled() 0
#define mysql_audit_table_enabled() 0
#endif
extern my_bool mysql_audit_release_required(THD *thd);
extern void mysql_audit_release(THD *thd);
static inline unsigned int strlen_uint(const char *s)
{
return (uint)strlen(s);
}
static inline unsigned int safe_strlen_uint(const char *s)
{
return (uint)safe_strlen(s);
}
#define MAX_USER_HOST_SIZE 512
static inline uint make_user_name(THD *thd, char *buf)
{
const Security_context *sctx= thd->security_ctx;
char *end= strxnmov(buf, MAX_USER_HOST_SIZE,
sctx->priv_user[0] ? sctx->priv_user : "", "[",
sctx->user ? sctx->user : "", "] @ ",
sctx->host ? sctx->host : "", " [",
sctx->ip ? sctx->ip : "", "]", NullS);
return (uint)(end-buf);
}
/**
Call audit plugins of GENERAL audit class, MYSQL_AUDIT_GENERAL_LOG subtype.
@param[in] thd
@param[in] time time that event occurred
@param[in] user User name
@param[in] userlen User name length
@param[in] cmd Command name
@param[in] cmdlen Command name length
@param[in] query Query string
@param[in] querylen Query string length
*/
static inline
void mysql_audit_general_log(THD *thd, time_t time,
const char *user, uint userlen,
const char *cmd, uint cmdlen,
const char *query, uint querylen)
{
if (mysql_audit_general_enabled())
{
mysql_event_general event;
event.event_subclass= MYSQL_AUDIT_GENERAL_LOG;
event.general_error_code= 0;
event.general_time= time;
event.general_user= user;
event.general_user_length= userlen;
event.general_command= cmd;
event.general_command_length= cmdlen;
event.general_query= query;
event.general_query_length= querylen;
event.general_rows= 0;
if (thd)
{
event.general_thread_id= (unsigned long)thd->thread_id;
event.general_charset= thd->variables.character_set_client;
event.database= thd->db;
event.query_id= thd->query_id;
}
else
{
event.general_thread_id= 0;
event.general_charset= global_system_variables.character_set_client;
event.database= null_clex_str;
event.query_id= 0;
}
mysql_audit_notify(thd, MYSQL_AUDIT_GENERAL_CLASS, &event);
}
}
/**
Call audit plugins of GENERAL audit class.
event_subtype should be set to one of:
MYSQL_AUDIT_GENERAL_ERROR
MYSQL_AUDIT_GENERAL_RESULT
MYSQL_AUDIT_GENERAL_STATUS
@param[in] thd
@param[in] event_subtype Type of general audit event.
@param[in] error_code Error code
@param[in] msg Message
*/
static inline
void mysql_audit_general(THD *thd, uint event_subtype,
int error_code, const char *msg)
{
DBUG_ENTER("mysql_audit_general");
if (mysql_audit_general_enabled())
{
char user_buff[MAX_USER_HOST_SIZE+1];
mysql_event_general event;
event.event_subclass= event_subtype;
event.general_error_code= error_code;
event.general_time= my_time(0);
event.general_command= msg;
event.general_command_length= safe_strlen_uint(msg);
if (thd)
{
event.general_user= user_buff;
event.general_user_length= make_user_name(thd, user_buff);
event.general_thread_id= (unsigned long)thd->thread_id;
event.general_query= thd->query_string.str();
event.general_query_length= (unsigned) thd->query_string.length();
event.general_charset= thd->query_string.charset();
event.general_rows= thd->get_stmt_da()->current_row_for_warning();
event.database= thd->db;
event.query_id= thd->query_id;
}
else
{
event.general_user= NULL;
event.general_user_length= 0;
event.general_thread_id= 0;
event.general_query= NULL;
event.general_query_length= 0;
event.general_charset= &my_charset_bin;
event.general_rows= 0;
event.database= null_clex_str;
event.query_id= 0;
}
mysql_audit_notify(thd, MYSQL_AUDIT_GENERAL_CLASS, &event);
}
DBUG_VOID_RETURN;
}
static inline
void mysql_audit_notify_connection_connect(THD *thd)
{
if (mysql_audit_connection_enabled())
{
const Security_context *sctx= thd->security_ctx;
mysql_event_connection event;
event.event_subclass= MYSQL_AUDIT_CONNECTION_CONNECT;
event.status= thd->get_stmt_da()->is_error() ?
thd->get_stmt_da()->sql_errno() : 0;
event.thread_id= (unsigned long)thd->thread_id;
event.user= sctx->user;
event.user_length= safe_strlen_uint(sctx->user);
event.priv_user= sctx->priv_user;
event.priv_user_length= strlen_uint(sctx->priv_user);
event.external_user= sctx->external_user;
event.external_user_length= safe_strlen_uint(sctx->external_user);
event.proxy_user= sctx->proxy_user;
event.proxy_user_length= strlen_uint(sctx->proxy_user);
event.host= sctx->host;
event.host_length= safe_strlen_uint(sctx->host);
event.ip= sctx->ip;
event.ip_length= safe_strlen_uint(sctx->ip);
event.database= thd->db;
mysql_audit_notify(thd, MYSQL_AUDIT_CONNECTION_CLASS, &event);
}
}
static inline
void mysql_audit_notify_connection_disconnect(THD *thd, int errcode)
{
if (mysql_audit_connection_enabled())
{
const Security_context *sctx= thd->security_ctx;
mysql_event_connection event;
event.event_subclass= MYSQL_AUDIT_CONNECTION_DISCONNECT;
event.status= errcode;
event.thread_id= (unsigned long)thd->thread_id;
event.user= sctx->user;
event.user_length= safe_strlen_uint(sctx->user);
event.priv_user= sctx->priv_user;
event.priv_user_length= strlen_uint(sctx->priv_user);
event.external_user= sctx->external_user;
event.external_user_length= safe_strlen_uint(sctx->external_user);
event.proxy_user= sctx->proxy_user;
event.proxy_user_length= strlen_uint(sctx->proxy_user);
event.host= sctx->host;
event.host_length= safe_strlen_uint(sctx->host);
event.ip= sctx->ip;
event.ip_length= safe_strlen_uint(sctx->ip) ;
event.database= thd->db;
mysql_audit_notify(thd, MYSQL_AUDIT_CONNECTION_CLASS, &event);
}
}
static inline
void mysql_audit_notify_connection_change_user(THD *thd,
const Security_context *old_ctx)
{
if (mysql_audit_connection_enabled())
{
mysql_event_connection event;
event.event_subclass= MYSQL_AUDIT_CONNECTION_CHANGE_USER;
event.status= thd->get_stmt_da()->is_error() ?
thd->get_stmt_da()->sql_errno() : 0;
event.thread_id= (unsigned long)thd->thread_id;
event.user= old_ctx->user;
event.user_length= safe_strlen_uint(old_ctx->user);
event.priv_user= old_ctx->priv_user;
event.priv_user_length= strlen_uint(old_ctx->priv_user);
event.external_user= old_ctx->external_user;
event.external_user_length= safe_strlen_uint(old_ctx->external_user);
event.proxy_user= old_ctx->proxy_user;
event.proxy_user_length= strlen_uint(old_ctx->proxy_user);
event.host= old_ctx->host;
event.host_length= safe_strlen_uint(old_ctx->host);
event.ip= old_ctx->ip;
event.ip_length= safe_strlen_uint(old_ctx->ip);
event.database= thd->db;
mysql_audit_notify(thd, MYSQL_AUDIT_CONNECTION_CLASS, &event);
}
}
static inline
void mysql_audit_external_lock_ex(THD *thd, my_thread_id thread_id,
const char *user, const char *host, const char *ip, query_id_t query_id,
TABLE_SHARE *share, int lock)
{
if (lock != F_UNLCK && mysql_audit_table_enabled())
{
const Security_context *sctx= thd->security_ctx;
mysql_event_table event;
event.event_subclass= MYSQL_AUDIT_TABLE_LOCK;
event.read_only= lock == F_RDLCK;
event.thread_id= (unsigned long)thread_id;
event.user= user;
event.priv_user= sctx->priv_user;
event.priv_host= sctx->priv_host;
event.external_user= sctx->external_user;
event.proxy_user= sctx->proxy_user;
event.host= host;
event.ip= ip;
event.database= share->db;
event.table= share->table_name;
event.new_database= null_clex_str;
event.new_table= null_clex_str;
event.query_id= query_id;
mysql_audit_notify(thd, MYSQL_AUDIT_TABLE_CLASS, &event);
}
}
static inline
void mysql_audit_external_lock(THD *thd, TABLE_SHARE *share, int lock)
{
mysql_audit_external_lock_ex(thd, thd->thread_id, thd->security_ctx->user,
thd->security_ctx->host, thd->security_ctx->ip, thd->query_id,
share, lock);
}
static inline
void mysql_audit_create_table(TABLE *table)
{
if (mysql_audit_table_enabled())
{
THD *thd= table->in_use;
const TABLE_SHARE *share= table->s;
const Security_context *sctx= thd->security_ctx;
mysql_event_table event;
event.event_subclass= MYSQL_AUDIT_TABLE_CREATE;
event.read_only= 0;
event.thread_id= (unsigned long)thd->thread_id;
event.user= sctx->user;
event.priv_user= sctx->priv_user;
event.priv_host= sctx->priv_host;
event.external_user= sctx->external_user;
event.proxy_user= sctx->proxy_user;
event.host= sctx->host;
event.ip= sctx->ip;
event.database= share->db;
event.table= share->table_name;
event.new_database= null_clex_str;
event.new_table= null_clex_str;
event.query_id= thd->query_id;
mysql_audit_notify(thd, MYSQL_AUDIT_TABLE_CLASS, &event);
}
}
static inline
void mysql_audit_drop_table(THD *thd, TABLE_LIST *table)
{
if (mysql_audit_table_enabled())
{
const Security_context *sctx= thd->security_ctx;
mysql_event_table event;
event.event_subclass= MYSQL_AUDIT_TABLE_DROP;
event.read_only= 0;
event.thread_id= (unsigned long)thd->thread_id;
event.user= sctx->user;
event.priv_user= sctx->priv_user;
event.priv_host= sctx->priv_host;
event.external_user= sctx->external_user;
event.proxy_user= sctx->proxy_user;
event.host= sctx->host;
event.ip= sctx->ip;
event.database= table->db;
event.table= table->table_name;
event.new_database= null_clex_str;
event.new_table= null_clex_str;
event.query_id= thd->query_id;
mysql_audit_notify(thd, MYSQL_AUDIT_TABLE_CLASS, &event);
}
}
static inline
void mysql_audit_rename_table(THD *thd, const LEX_CSTRING *old_db,
const LEX_CSTRING *old_tb,
const LEX_CSTRING *new_db, const LEX_CSTRING *new_tb)
{
if (mysql_audit_table_enabled())
{
const Security_context *sctx= thd->security_ctx;
mysql_event_table event;
event.event_subclass= MYSQL_AUDIT_TABLE_RENAME;
event.read_only= 0;
event.thread_id= (unsigned long)thd->thread_id;
event.user= sctx->user;
event.priv_user= sctx->priv_user;
event.priv_host= sctx->priv_host;
event.external_user= sctx->external_user;
event.proxy_user= sctx->proxy_user;
event.host= sctx->host;
event.ip= sctx->ip;
event.database= *old_db;
event.table= *old_tb;
event.new_database= *new_db;
event.new_table= *new_tb;
event.query_id= thd->query_id;
mysql_audit_notify(thd, MYSQL_AUDIT_TABLE_CLASS, &event);
}
}
static inline
void mysql_audit_alter_table(THD *thd, TABLE_LIST *table)
{
if (mysql_audit_table_enabled())
{
const Security_context *sctx= thd->security_ctx;
mysql_event_table event;
event.event_subclass= MYSQL_AUDIT_TABLE_ALTER;
event.read_only= 0;
event.thread_id= (unsigned long)thd->thread_id;
event.user= sctx->user;
event.priv_user= sctx->priv_user;
event.priv_host= sctx->priv_host;
event.external_user= sctx->external_user;
event.proxy_user= sctx->proxy_user;
event.host= sctx->host;
event.ip= sctx->ip;
event.database= table->db;
event.table= table->table_name;
event.new_database= null_clex_str;
event.new_table= null_clex_str;
event.query_id= thd->query_id;
mysql_audit_notify(thd, MYSQL_AUDIT_TABLE_CLASS, &event);
}
}
#endif /* SQL_AUDIT_INCLUDED */