summaryrefslogtreecommitdiff
path: root/sql/sql_acl.h
blob: 1aeb123153e20bb56f80354343c5f8d463939c53 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
#ifndef SQL_ACL_INCLUDED
#define SQL_ACL_INCLUDED

/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved.

   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 02110-1301  USA */

#include "my_global.h"                          /* NO_EMBEDDED_ACCESS_CHECKS */
#include "violite.h"                            /* SSL_type */
#include "sql_class.h"                          /* LEX_COLUMN */

#define SELECT_ACL      (1L << 0)
#define INSERT_ACL      (1L << 1)
#define UPDATE_ACL      (1L << 2)
#define DELETE_ACL      (1L << 3)
#define CREATE_ACL      (1L << 4)
#define DROP_ACL        (1L << 5)
#define RELOAD_ACL      (1L << 6)
#define SHUTDOWN_ACL    (1L << 7)
#define PROCESS_ACL     (1L << 8)
#define FILE_ACL        (1L << 9)
#define GRANT_ACL       (1L << 10)
#define REFERENCES_ACL  (1L << 11)
#define INDEX_ACL       (1L << 12)
#define ALTER_ACL       (1L << 13)
#define SHOW_DB_ACL     (1L << 14)
#define SUPER_ACL       (1L << 15)
#define CREATE_TMP_ACL  (1L << 16)
#define LOCK_TABLES_ACL (1L << 17)
#define EXECUTE_ACL     (1L << 18)
#define REPL_SLAVE_ACL  (1L << 19)
#define REPL_CLIENT_ACL (1L << 20)
#define CREATE_VIEW_ACL (1L << 21)
#define SHOW_VIEW_ACL   (1L << 22)
#define CREATE_PROC_ACL (1L << 23)
#define ALTER_PROC_ACL  (1L << 24)
#define CREATE_USER_ACL (1L << 25)
#define EVENT_ACL       (1L << 26)
#define TRIGGER_ACL     (1L << 27)
#define CREATE_TABLESPACE_ACL (1L << 28)
/*
  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       (1L << 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)

#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)

#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)

#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 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)
#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)
#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 fix_rights_for_table(A) (((A)        & TBL_CHUNK0) | \
                                (((A) <<  4) & TBL_CHUNK1) | \
                                (((A) << 11) & TBL_CHUNK2) | \
                                (((A) << 15) & TBL_CHUNK3))
#define get_rights_for_table(A) (((A) & TBL_CHUNK0)        | \
                                (((A) & TBL_CHUNK1) >>  4) | \
                                (((A) & TBL_CHUNK2) >> 11) | \
                                (((A) & TBL_CHUNK3) >> 15))
#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_COUNT
};

extern const TABLE_FIELD_DEF mysql_db_table_def;
extern bool mysql_user_table_is_in_short_password_format;

extern LEX_STRING host_not_specified;
extern LEX_STRING current_user;
extern LEX_STRING current_role;
extern LEX_STRING current_user_and_current_role;


static inline int access_denied_error_code(int passwd_used)
{
  return passwd_used == 2 ? ER_ACCESS_DENIED_NO_PASSWORD_ERROR
                          : ER_ACCESS_DENIED_ERROR;
}


/* prototypes */

bool hostname_requires_resolving(const char *hostname);
my_bool  acl_init(bool dont_read_acl_tables);
my_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, char *user, char *host,
                 char *ip, char *db);
bool acl_check_host(const char *host, const char *ip);
int check_change_password(THD *thd, const char *host, const char *user,
                           char *password, uint password_len);
bool change_password(THD *thd, const char *host, const char *user,
                     char *password);

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, bool is_proc,
                         List <LEX_USER> &user_list, ulong rights,
                         bool revoke, bool write_to_binlog);
my_bool grant_init();
void grant_free(void);
my_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, uint length, Security_context *sctx);
bool check_column_grant_in_table_ref(THD *thd, TABLE_LIST * table_ref,
                                     const char *name, uint length);
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, bool is_proc, bool no_error);
bool check_grant_db(THD *thd,const char *db);
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 mysql_show_grants(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);
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,
                          bool is_proc);
bool sp_grant_privileges(THD *thd, const char *sp_db, const char *sp_name,
                         bool is_proc);
bool check_routine_level_acl(THD *thd, const char *db, const char *name,
                             bool is_proc);
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);
int check_password_policy(String *password);
#ifdef NO_EMBEDDED_ACCESS_CHECKS
#define check_grant(A,B,C,D,E,F) 0
#define check_grant_db(A,B) 0
#endif

/**
  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_STRING *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, char *rolename, ulonglong access);
int acl_check_setrole(THD *thd, char *rolename, ulonglong *access);

#ifndef DBUG_OFF
extern ulong role_global_merges, role_db_merges, role_table_merges,
             role_column_merges, role_routine_merges;
#endif
#endif /* SQL_ACL_INCLUDED */