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mariadb/sql/sql_acl.h

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#ifndef SQL_ACL_INCLUDED
#define SQL_ACL_INCLUDED
/* Copyright (c) 2000, 2010, 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 "violite.h" /* SSL_type */
#include "sql_class.h" /* LEX_COLUMN */
#include "grant.h"
#include "sql_cmd.h" /* Sql_cmd */
#define SELECT_ACL (1UL << 0)
#define INSERT_ACL (1UL << 1)
#define UPDATE_ACL (1UL << 2)
#define DELETE_ACL (1UL << 3)
#define CREATE_ACL (1UL << 4)
#define DROP_ACL (1UL << 5)
#define RELOAD_ACL (1UL << 6)
#define SHUTDOWN_ACL (1UL << 7)
#define PROCESS_ACL (1UL << 8)
#define FILE_ACL (1UL << 9)
#define GRANT_ACL (1UL << 10)
#define REFERENCES_ACL (1UL << 11)
#define INDEX_ACL (1UL << 12)
#define ALTER_ACL (1UL << 13)
#define SHOW_DB_ACL (1UL << 14)
#define SUPER_ACL (1UL << 15)
#define CREATE_TMP_ACL (1UL << 16)
#define LOCK_TABLES_ACL (1UL << 17)
#define EXECUTE_ACL (1UL << 18)
#define REPL_SLAVE_ACL (1UL << 19)
#define REPL_CLIENT_ACL (1UL << 20)
#define CREATE_VIEW_ACL (1UL << 21)
#define SHOW_VIEW_ACL (1UL << 22)
#define CREATE_PROC_ACL (1UL << 23)
#define ALTER_PROC_ACL (1UL << 24)
#define CREATE_USER_ACL (1UL << 25)
#define EVENT_ACL (1UL << 26)
#define TRIGGER_ACL (1UL << 27)
#define CREATE_TABLESPACE_ACL (1UL << 28)
#define DELETE_HISTORY_ACL (1UL << 29)
/*
don't forget to update
1. static struct show_privileges_st sys_privileges[]
2. static const char *command_array[] and static uint command_lengths[]
3. mysql_system_tables.sql and mysql_system_tables_fix.sql
4. acl_init() or whatever - to define behaviour for old privilege tables
5. sql_yacc.yy - for GRANT/REVOKE to work
*/
#define NO_ACCESS (1UL << 30)
#define DB_ACLS \
(UPDATE_ACL | SELECT_ACL | INSERT_ACL | DELETE_ACL | CREATE_ACL | DROP_ACL | \
GRANT_ACL | REFERENCES_ACL | INDEX_ACL | ALTER_ACL | CREATE_TMP_ACL | \
LOCK_TABLES_ACL | EXECUTE_ACL | CREATE_VIEW_ACL | SHOW_VIEW_ACL | \
CREATE_PROC_ACL | ALTER_PROC_ACL | EVENT_ACL | TRIGGER_ACL | \
DELETE_HISTORY_ACL)
#define TABLE_ACLS \
(SELECT_ACL | INSERT_ACL | UPDATE_ACL | DELETE_ACL | CREATE_ACL | DROP_ACL | \
GRANT_ACL | REFERENCES_ACL | INDEX_ACL | ALTER_ACL | CREATE_VIEW_ACL | \
SHOW_VIEW_ACL | TRIGGER_ACL | DELETE_HISTORY_ACL)
#define COL_ACLS \
(SELECT_ACL | INSERT_ACL | UPDATE_ACL | REFERENCES_ACL)
#define PROC_ACLS \
(ALTER_PROC_ACL | EXECUTE_ACL | GRANT_ACL)
#define SHOW_PROC_ACLS \
(ALTER_PROC_ACL | EXECUTE_ACL | CREATE_PROC_ACL)
#define GLOBAL_ACLS \
(SELECT_ACL | INSERT_ACL | UPDATE_ACL | DELETE_ACL | CREATE_ACL | DROP_ACL | \
RELOAD_ACL | SHUTDOWN_ACL | PROCESS_ACL | FILE_ACL | GRANT_ACL | \
REFERENCES_ACL | INDEX_ACL | ALTER_ACL | SHOW_DB_ACL | SUPER_ACL | \
CREATE_TMP_ACL | LOCK_TABLES_ACL | REPL_SLAVE_ACL | REPL_CLIENT_ACL | \
EXECUTE_ACL | CREATE_VIEW_ACL | SHOW_VIEW_ACL | CREATE_PROC_ACL | \
ALTER_PROC_ACL | CREATE_USER_ACL | EVENT_ACL | TRIGGER_ACL | \
CREATE_TABLESPACE_ACL | DELETE_HISTORY_ACL)
#define DEFAULT_CREATE_PROC_ACLS \
(ALTER_PROC_ACL | EXECUTE_ACL)
#define SHOW_CREATE_TABLE_ACLS \
(SELECT_ACL | INSERT_ACL | UPDATE_ACL | DELETE_ACL | \
CREATE_ACL | DROP_ACL | ALTER_ACL | INDEX_ACL | \
TRIGGER_ACL | REFERENCES_ACL | GRANT_ACL | CREATE_VIEW_ACL | SHOW_VIEW_ACL)
/**
Table-level privileges which are automatically "granted" to everyone on
existing temporary tables (CREATE_ACL is necessary for ALTER ... RENAME).
*/
#define TMP_TABLE_ACLS \
(SELECT_ACL | INSERT_ACL | UPDATE_ACL | DELETE_ACL | CREATE_ACL | DROP_ACL | \
INDEX_ACL | ALTER_ACL)
/*
Defines to change the above bits to how things are stored in tables
This is needed as the 'host' and 'db' table is missing a few privileges
*/
/* Privileges that needs to be reallocated (in continous chunks) */
#define DB_CHUNK0 (SELECT_ACL | INSERT_ACL | UPDATE_ACL | DELETE_ACL | \
CREATE_ACL | DROP_ACL)
#define DB_CHUNK1 (GRANT_ACL | REFERENCES_ACL | INDEX_ACL | ALTER_ACL)
#define DB_CHUNK2 (CREATE_TMP_ACL | LOCK_TABLES_ACL)
#define DB_CHUNK3 (CREATE_VIEW_ACL | SHOW_VIEW_ACL | \
CREATE_PROC_ACL | ALTER_PROC_ACL )
#define DB_CHUNK4 (EXECUTE_ACL)
#define DB_CHUNK5 (EVENT_ACL | TRIGGER_ACL)
#define DB_CHUNK6 (DELETE_HISTORY_ACL)
#define fix_rights_for_db(A) (((A) & DB_CHUNK0) | \
(((A) << 4) & DB_CHUNK1) | \
(((A) << 6) & DB_CHUNK2) | \
(((A) << 9) & DB_CHUNK3) | \
(((A) << 2) & DB_CHUNK4) | \
(((A) << 9) & DB_CHUNK5) | \
(((A) << 10) & DB_CHUNK6))
#define get_rights_for_db(A) (((A) & DB_CHUNK0) | \
(((A) & DB_CHUNK1) >> 4) | \
(((A) & DB_CHUNK2) >> 6) | \
(((A) & DB_CHUNK3) >> 9) | \
(((A) & DB_CHUNK4) >> 2) | \
(((A) & DB_CHUNK5) >> 9) | \
(((A) & DB_CHUNK6) >> 10))
#define TBL_CHUNK0 DB_CHUNK0
#define TBL_CHUNK1 DB_CHUNK1
#define TBL_CHUNK2 (CREATE_VIEW_ACL | SHOW_VIEW_ACL)
#define TBL_CHUNK3 TRIGGER_ACL
#define TBL_CHUNK4 (DELETE_HISTORY_ACL)
#define fix_rights_for_table(A) (((A) & TBL_CHUNK0) | \
(((A) << 4) & TBL_CHUNK1) | \
(((A) << 11) & TBL_CHUNK2) | \
(((A) << 15) & TBL_CHUNK3) | \
(((A) << 16) & TBL_CHUNK4))
#define get_rights_for_table(A) (((A) & TBL_CHUNK0) | \
(((A) & TBL_CHUNK1) >> 4) | \
(((A) & TBL_CHUNK2) >> 11) | \
(((A) & TBL_CHUNK3) >> 15) | \
(((A) & TBL_CHUNK4) >> 16))
#define fix_rights_for_column(A) (((A) & 7) | (((A) & ~7) << 8))
#define get_rights_for_column(A) (((A) & 7) | ((A) >> 8))
#define fix_rights_for_procedure(A) ((((A) << 18) & EXECUTE_ACL) | \
(((A) << 23) & ALTER_PROC_ACL) | \
(((A) << 8) & GRANT_ACL))
#define get_rights_for_procedure(A) ((((A) & EXECUTE_ACL) >> 18) | \
(((A) & ALTER_PROC_ACL) >> 23) | \
(((A) & GRANT_ACL) >> 8))
enum mysql_db_table_field
{
MYSQL_DB_FIELD_HOST = 0,
MYSQL_DB_FIELD_DB,
MYSQL_DB_FIELD_USER,
MYSQL_DB_FIELD_SELECT_PRIV,
MYSQL_DB_FIELD_INSERT_PRIV,
MYSQL_DB_FIELD_UPDATE_PRIV,
MYSQL_DB_FIELD_DELETE_PRIV,
MYSQL_DB_FIELD_CREATE_PRIV,
MYSQL_DB_FIELD_DROP_PRIV,
MYSQL_DB_FIELD_GRANT_PRIV,
MYSQL_DB_FIELD_REFERENCES_PRIV,
MYSQL_DB_FIELD_INDEX_PRIV,
MYSQL_DB_FIELD_ALTER_PRIV,
MYSQL_DB_FIELD_CREATE_TMP_TABLE_PRIV,
MYSQL_DB_FIELD_LOCK_TABLES_PRIV,
MYSQL_DB_FIELD_CREATE_VIEW_PRIV,
MYSQL_DB_FIELD_SHOW_VIEW_PRIV,
MYSQL_DB_FIELD_CREATE_ROUTINE_PRIV,
MYSQL_DB_FIELD_ALTER_ROUTINE_PRIV,
MYSQL_DB_FIELD_EXECUTE_PRIV,
MYSQL_DB_FIELD_EVENT_PRIV,
MYSQL_DB_FIELD_TRIGGER_PRIV,
MYSQL_DB_FIELD_DELETE_VERSIONING_ROWS_PRIV,
MYSQL_DB_FIELD_COUNT
};
extern const TABLE_FIELD_DEF mysql_db_table_def;
extern bool mysql_user_table_is_in_short_password_format;
extern LEX_CSTRING host_not_specified;
extern LEX_CSTRING current_user;
extern LEX_CSTRING current_role;
extern LEX_CSTRING current_user_and_current_role;
static inline int access_denied_error_code(int passwd_used)
{
#ifdef mysqld_error_find_printf_error_used
return 0;
#else
return passwd_used == 2 ? ER_ACCESS_DENIED_NO_PASSWORD_ERROR
: ER_ACCESS_DENIED_ERROR;
#endif
}
/* prototypes */
bool hostname_requires_resolving(const char *hostname);
bool acl_init(bool dont_read_acl_tables);
bool acl_reload(THD *thd);
void acl_free(bool end=0);
ulong acl_get(const char *host, const char *ip,
const char *user, const char *db, my_bool db_is_pattern);
bool acl_authenticate(THD *thd, uint com_change_user_pkt_len);
bool acl_getroot(Security_context *sctx, const char *user, const char *host,
const char *ip, const char *db);
bool acl_check_host(const char *host, const char *ip);
bool check_change_password(THD *thd, LEX_USER *user);
bool change_password(THD *thd, LEX_USER *user);
bool mysql_grant_role(THD *thd, List<LEX_USER> &user_list, bool revoke);
bool mysql_grant(THD *thd, const char *db, List <LEX_USER> &user_list,
ulong rights, bool revoke, bool is_proxy);
int mysql_table_grant(THD *thd, TABLE_LIST *table, List <LEX_USER> &user_list,
List <LEX_COLUMN> &column_list, ulong rights,
bool revoke);
bool mysql_routine_grant(THD *thd, TABLE_LIST *table, const Sp_handler *sph,
List <LEX_USER> &user_list, ulong rights,
bool revoke, bool write_to_binlog);
bool grant_init();
void grant_free(void);
bool grant_reload(THD *thd);
bool check_grant(THD *thd, ulong want_access, TABLE_LIST *tables,
bool any_combination_will_do, uint number, bool no_errors);
bool check_grant_column (THD *thd, GRANT_INFO *grant,
const char *db_name, const char *table_name,
const char *name, size_t length, Security_context *sctx);
bool check_column_grant_in_table_ref(THD *thd, TABLE_LIST * table_ref,
const char *name, size_t length, Field *fld);
bool check_grant_all_columns(THD *thd, ulong want_access,
Field_iterator_table_ref *fields);
bool check_grant_routine(THD *thd, ulong want_access,
TABLE_LIST *procs, const Sp_handler *sph,
bool no_error);
bool check_grant_db(THD *thd,const char *db);
bool check_global_access(THD *thd, ulong want_access, bool no_errors= false);
bool check_access(THD *thd, ulong want_access, const char *db, ulong *save_priv,
GRANT_INTERNAL_INFO *grant_internal_info,
bool dont_check_global_grants, bool no_errors);
ulong get_table_grant(THD *thd, TABLE_LIST *table);
ulong get_column_grant(THD *thd, GRANT_INFO *grant,
const char *db_name, const char *table_name,
const char *field_name);
bool get_show_user(THD *thd, LEX_USER *lex_user, const char **username,
const char **hostname, const char **rolename);
void mysql_show_grants_get_fields(THD *thd, List<Item> *fields,
const char *name, size_t length);
bool mysql_show_grants(THD *thd, LEX_USER *user);
bool mysql_show_create_user(THD *thd, LEX_USER *user);
int fill_schema_enabled_roles(THD *thd, TABLE_LIST *tables, COND *cond);
int fill_schema_applicable_roles(THD *thd, TABLE_LIST *tables, COND *cond);
void get_privilege_desc(char *to, uint max_length, ulong access);
void get_mqh(const char *user, const char *host, USER_CONN *uc);
bool mysql_create_user(THD *thd, List <LEX_USER> &list, bool handle_as_role);
bool mysql_drop_user(THD *thd, List <LEX_USER> &list, bool handle_as_role);
bool mysql_rename_user(THD *thd, List <LEX_USER> &list);
int mysql_alter_user(THD *thd, List <LEX_USER> &list);
bool mysql_revoke_all(THD *thd, List <LEX_USER> &list);
void fill_effective_table_privileges(THD *thd, GRANT_INFO *grant,
const char *db, const char *table);
bool sp_revoke_privileges(THD *thd, const char *sp_db, const char *sp_name,
const Sp_handler *sph);
bool sp_grant_privileges(THD *thd, const char *sp_db, const char *sp_name,
const Sp_handler *sph);
bool check_routine_level_acl(THD *thd, const char *db, const char *name,
const Sp_handler *sph);
bool is_acl_user(const char *host, const char *user);
int fill_schema_user_privileges(THD *thd, TABLE_LIST *tables, COND *cond);
int fill_schema_schema_privileges(THD *thd, TABLE_LIST *tables, COND *cond);
int fill_schema_table_privileges(THD *thd, TABLE_LIST *tables, COND *cond);
int fill_schema_column_privileges(THD *thd, TABLE_LIST *tables, COND *cond);
int wild_case_compare(CHARSET_INFO *cs, const char *str,const char *wildstr);
/**
Result of an access check for an internal schema or table.
Internal ACL checks are always performed *before* using
the grant tables.
This mechanism enforces that the server implementation has full
control on its internal tables.
Depending on the internal check result, the server implementation
can choose to:
- always allow access,
- always deny access,
- delegate the decision to the database administrator,
by using the grant tables.
*/
enum ACL_internal_access_result
{
/**
Access granted for all the requested privileges,
do not use the grant tables.
This flag is used only for the INFORMATION_SCHEMA privileges,
for compatibility reasons.
*/
ACL_INTERNAL_ACCESS_GRANTED,
/** Access denied, do not use the grant tables. */
ACL_INTERNAL_ACCESS_DENIED,
/** No decision yet, use the grant tables. */
ACL_INTERNAL_ACCESS_CHECK_GRANT
};
/**
Per internal table ACL access rules.
This class is an interface.
Per table(s) specific access rule should be implemented in a subclass.
@sa ACL_internal_schema_access
*/
class ACL_internal_table_access
{
public:
ACL_internal_table_access()
{}
virtual ~ACL_internal_table_access()
{}
/**
Check access to an internal table.
When a privilege is granted, this method add the requested privilege
to save_priv.
@param want_access the privileges requested
@param [in, out] save_priv the privileges granted
@return
@retval ACL_INTERNAL_ACCESS_GRANTED All the requested privileges
are granted, and saved in save_priv.
@retval ACL_INTERNAL_ACCESS_DENIED At least one of the requested
privileges was denied.
@retval ACL_INTERNAL_ACCESS_CHECK_GRANT No requested privilege
was denied, and grant should be checked for at least one
privilege. Requested privileges that are granted, if any, are saved
in save_priv.
*/
virtual ACL_internal_access_result check(ulong want_access,
ulong *save_priv) const= 0;
};
/**
Per internal schema ACL access rules.
This class is an interface.
Each per schema specific access rule should be implemented
in a different subclass, and registered.
Per schema access rules can control:
- every schema privileges on schema.*
- every table privileges on schema.table
@sa ACL_internal_schema_registry
*/
class ACL_internal_schema_access
{
public:
ACL_internal_schema_access()
{}
virtual ~ACL_internal_schema_access()
{}
/**
Check access to an internal schema.
@param want_access the privileges requested
@param [in, out] save_priv the privileges granted
@return
@retval ACL_INTERNAL_ACCESS_GRANTED All the requested privileges
are granted, and saved in save_priv.
@retval ACL_INTERNAL_ACCESS_DENIED At least one of the requested
privileges was denied.
@retval ACL_INTERNAL_ACCESS_CHECK_GRANT No requested privilege
was denied, and grant should be checked for at least one
privilege. Requested privileges that are granted, if any, are saved
in save_priv.
*/
virtual ACL_internal_access_result check(ulong want_access,
ulong *save_priv) const= 0;
/**
Search for per table ACL access rules by table name.
@param name the table name
@return per table access rules, or NULL
*/
virtual const ACL_internal_table_access *lookup(const char *name) const= 0;
};
/**
A registry for per internal schema ACL.
An 'internal schema' is a database schema maintained by the
server implementation, such as 'performance_schema' and 'INFORMATION_SCHEMA'.
*/
class ACL_internal_schema_registry
{
public:
static void register_schema(const LEX_CSTRING *name,
const ACL_internal_schema_access *access);
static const ACL_internal_schema_access *lookup(const char *name);
};
const ACL_internal_schema_access *
get_cached_schema_access(GRANT_INTERNAL_INFO *grant_internal_info,
const char *schema_name);
const ACL_internal_table_access *
get_cached_table_access(GRANT_INTERNAL_INFO *grant_internal_info,
const char *schema_name,
const char *table_name);
bool acl_check_proxy_grant_access (THD *thd, const char *host, const char *user,
bool with_grant);
int acl_setrole(THD *thd, const char *rolename, ulonglong access);
int acl_check_setrole(THD *thd, const char *rolename, ulonglong *access);
int acl_check_set_default_role(THD *thd, const char *host, const char *user);
int acl_set_default_role(THD *thd, const char *host, const char *user,
const char *rolename);
extern SHOW_VAR acl_statistics[];
/* Check if a role is granted to a user/role.
If hostname == NULL, search for a role as the starting grantee.
*/
bool check_role_is_granted(const char *username,
const char *hostname,
const char *rolename);
#ifndef DBUG_OFF
extern ulong role_global_merges, role_db_merges, role_table_merges,
role_column_merges, role_routine_merges;
#endif
class Sql_cmd_grant: public Sql_cmd
{
protected:
enum_sql_command m_command;
#ifndef NO_EMBEDDED_ACCESS_CHECKS
void warn_hostname_requires_resolving(THD *thd, List<LEX_USER> &list);
bool user_list_reset_mqh(THD *thd, List<LEX_USER> &list);
void grant_stage0(THD *thd);
#endif
public:
Sql_cmd_grant(enum_sql_command command)
:m_command(command)
{ }
bool is_revoke() const { return m_command == SQLCOM_REVOKE; }
enum_sql_command sql_command_code() const { return m_command; }
};
class Sql_cmd_grant_proxy: public Sql_cmd_grant
{
uint m_grant_option;
#ifndef NO_EMBEDDED_ACCESS_CHECKS
bool check_access_proxy(THD *thd, List<LEX_USER> &list);
#endif
public:
Sql_cmd_grant_proxy(enum_sql_command command, uint grant_option)
:Sql_cmd_grant(command), m_grant_option(grant_option)
{ }
bool execute(THD *thd);
};
class Sql_cmd_grant_object: public Sql_cmd_grant, public Grant_privilege
{
protected:
#ifndef NO_EMBEDDED_ACCESS_CHECKS
bool grant_stage0_exact_object(THD *thd, TABLE_LIST *table);
#endif
public:
Sql_cmd_grant_object(enum_sql_command command, const Grant_privilege &grant)
:Sql_cmd_grant(command), Grant_privilege(grant)
{ }
};
class Sql_cmd_grant_table: public Sql_cmd_grant_object
{
#ifndef NO_EMBEDDED_ACCESS_CHECKS
bool execute_table_mask(THD *thd);
bool execute_exact_table(THD *thd, TABLE_LIST *table);
#endif
public:
Sql_cmd_grant_table(enum_sql_command command, const Grant_privilege &grant)
:Sql_cmd_grant_object(command, grant)
{ }
bool execute(THD *thd);
};
class Sql_cmd_grant_sp: public Sql_cmd_grant_object
{
const Sp_handler &m_sph;
public:
Sql_cmd_grant_sp(enum_sql_command command, const Grant_privilege &grant,
const Sp_handler &sph)
:Sql_cmd_grant_object(command, grant),
m_sph(sph)
{ }
bool execute(THD *thd);
};
#endif /* SQL_ACL_INCLUDED */