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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 */
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