2 * Unix SMB/CIFS implementation.
3 * RPC Pipe client / server routines
4 * Copyright (C) Andrew Tridgell 1992-2006,
5 * Copyright (C) Jean François Micouleau 1998-2001.
6 * Copyright (C) Volker Lendecke 2006.
7 * Copyright (C) Gerald Carter 2006.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, see <http://www.gnu.org/licenses/>.
24 #include "groupdb/mapping.h"
26 static TDB_CONTEXT
*tdb
; /* used for driver files */
28 static bool enum_group_mapping(const DOM_SID
*domsid
, enum lsa_SidType sid_name_use
, GROUP_MAP
**pp_rmap
,
29 size_t *p_num_entries
, bool unix_only
);
30 static bool group_map_remove(const DOM_SID
*sid
);
32 /****************************************************************************
33 Open the group mapping tdb.
34 ****************************************************************************/
35 static bool init_group_mapping(void)
37 const char *vstring
= "INFO/version";
39 GROUP_MAP
*map_table
= NULL
;
40 size_t num_entries
= 0;
45 tdb
= tdb_open_log(state_path("group_mapping.tdb"), 0, TDB_DEFAULT
, O_RDWR
|O_CREAT
, 0600);
47 DEBUG(0,("Failed to open group mapping database\n"));
51 /* handle a Samba upgrade */
52 tdb_lock_bystring(tdb
, vstring
);
54 /* Cope with byte-reversed older versions of the db. */
55 vers_id
= tdb_fetch_int32(tdb
, vstring
);
56 if ((vers_id
== DATABASE_VERSION_V1
) || (IREV(vers_id
) == DATABASE_VERSION_V1
)) {
57 /* Written on a bigendian machine with old fetch_int code. Save as le. */
58 tdb_store_int32(tdb
, vstring
, DATABASE_VERSION_V2
);
59 vers_id
= DATABASE_VERSION_V2
;
62 /* if its an unknown version we remove everthing in the db */
64 if (vers_id
!= DATABASE_VERSION_V2
) {
65 tdb_traverse(tdb
, tdb_traverse_delete_fn
, NULL
);
66 tdb_store_int32(tdb
, vstring
, DATABASE_VERSION_V2
);
69 tdb_unlock_bystring(tdb
, vstring
);
71 /* cleanup any map entries with a gid == -1 */
73 if ( enum_group_mapping( NULL
, SID_NAME_UNKNOWN
, &map_table
, &num_entries
, False
) ) {
76 for ( i
=0; i
<num_entries
; i
++ ) {
77 if ( map_table
[i
].gid
== -1 ) {
78 group_map_remove( &map_table
[i
].sid
);
82 SAFE_FREE( map_table
);
89 /****************************************************************************
90 ****************************************************************************/
91 static bool add_mapping_entry(GROUP_MAP
*map
, int flag
)
96 fstring string_sid
="";
100 sid_to_fstring(string_sid
, &map
->sid
);
102 len
= tdb_pack(NULL
, sizeof(buf
), "ddff",
103 map
->gid
, map
->sid_name_use
, map
->nt_name
, map
->comment
);
105 buf
= SMB_MALLOC_ARRAY(char, len
);
109 len
= tdb_pack((uint8
*)buf
, sizeof(buf
), "ddff", map
->gid
,
110 map
->sid_name_use
, map
->nt_name
, map
->comment
);
113 if (asprintf(&key
, "%s%s", GROUP_PREFIX
, string_sid
) < 0) {
119 dbuf
.dptr
= (uint8
*)buf
;
121 ret
= (tdb_store_bystring(tdb
, key
, dbuf
, flag
) == 0);
129 /****************************************************************************
130 Return the sid and the type of the unix group.
131 ****************************************************************************/
133 static bool get_group_map_from_sid(DOM_SID sid
, GROUP_MAP
*map
)
140 /* the key is the SID, retrieving is direct */
142 sid_to_fstring(string_sid
, &sid
);
143 if (asprintf(&key
, "%s%s", GROUP_PREFIX
, string_sid
) < 0) {
147 dbuf
= tdb_fetch_bystring(tdb
, key
);
155 ret
= tdb_unpack(dbuf
.dptr
, dbuf
.dsize
, "ddff",
156 &map
->gid
, &map
->sid_name_use
,
157 &map
->nt_name
, &map
->comment
);
159 SAFE_FREE(dbuf
.dptr
);
162 DEBUG(3,("get_group_map_from_sid: tdb_unpack failure\n"));
166 sid_copy(&map
->sid
, &sid
);
171 /****************************************************************************
172 Return the sid and the type of the unix group.
173 ****************************************************************************/
175 static bool get_group_map_from_gid(gid_t gid
, GROUP_MAP
*map
)
177 TDB_DATA kbuf
, dbuf
, newkey
;
181 /* we need to enumerate the TDB to find the GID */
183 for (kbuf
= tdb_firstkey(tdb
);
185 newkey
= tdb_nextkey(tdb
, kbuf
), safe_free(kbuf
.dptr
), kbuf
=newkey
) {
187 if (strncmp((const char *)kbuf
.dptr
, GROUP_PREFIX
, strlen(GROUP_PREFIX
)) != 0) continue;
189 dbuf
= tdb_fetch(tdb
, kbuf
);
193 fstrcpy(string_sid
, (const char *)kbuf
.dptr
+strlen(GROUP_PREFIX
));
195 string_to_sid(&map
->sid
, string_sid
);
197 ret
= tdb_unpack(dbuf
.dptr
, dbuf
.dsize
, "ddff",
198 &map
->gid
, &map
->sid_name_use
, &map
->nt_name
, &map
->comment
);
200 SAFE_FREE(dbuf
.dptr
);
203 DEBUG(3,("get_group_map_from_gid: tdb_unpack failure\n"));
208 SAFE_FREE(kbuf
.dptr
);
216 /****************************************************************************
217 Return the sid and the type of the unix group.
218 ****************************************************************************/
220 static bool get_group_map_from_ntname(const char *name
, GROUP_MAP
*map
)
222 TDB_DATA kbuf
, dbuf
, newkey
;
226 /* we need to enumerate the TDB to find the name */
228 for (kbuf
= tdb_firstkey(tdb
);
230 newkey
= tdb_nextkey(tdb
, kbuf
), safe_free(kbuf
.dptr
), kbuf
=newkey
) {
232 if (strncmp((const char *)kbuf
.dptr
, GROUP_PREFIX
, strlen(GROUP_PREFIX
)) != 0) continue;
234 dbuf
= tdb_fetch(tdb
, kbuf
);
238 fstrcpy(string_sid
, (const char *)kbuf
.dptr
+strlen(GROUP_PREFIX
));
240 string_to_sid(&map
->sid
, string_sid
);
242 ret
= tdb_unpack(dbuf
.dptr
, dbuf
.dsize
, "ddff",
243 &map
->gid
, &map
->sid_name_use
, &map
->nt_name
, &map
->comment
);
245 SAFE_FREE(dbuf
.dptr
);
248 DEBUG(3,("get_group_map_from_ntname: tdb_unpack failure\n"));
252 if ( strequal(name
, map
->nt_name
) ) {
253 SAFE_FREE(kbuf
.dptr
);
261 /****************************************************************************
262 Remove a group mapping entry.
263 ****************************************************************************/
265 static bool group_map_remove(const DOM_SID
*sid
)
272 /* the key is the SID, retrieving is direct */
274 sid_to_fstring(string_sid
, sid
);
275 if (asprintf(&key
, "%s%s", GROUP_PREFIX
, string_sid
) < 0) {
279 dbuf
= tdb_fetch_bystring(tdb
, key
);
285 SAFE_FREE(dbuf
.dptr
);
287 ret
= (tdb_delete_bystring(tdb
, key
) == TDB_SUCCESS
);
292 /****************************************************************************
293 Enumerate the group mapping.
294 ****************************************************************************/
296 static bool enum_group_mapping(const DOM_SID
*domsid
, enum lsa_SidType sid_name_use
, GROUP_MAP
**pp_rmap
,
297 size_t *p_num_entries
, bool unix_only
)
299 TDB_DATA kbuf
, dbuf
, newkey
;
311 for (kbuf
= tdb_firstkey(tdb
);
313 newkey
= tdb_nextkey(tdb
, kbuf
), safe_free(kbuf
.dptr
), kbuf
=newkey
) {
315 if (strncmp((const char *)kbuf
.dptr
, GROUP_PREFIX
, strlen(GROUP_PREFIX
)) != 0)
318 dbuf
= tdb_fetch(tdb
, kbuf
);
322 fstrcpy(string_sid
, (const char *)kbuf
.dptr
+strlen(GROUP_PREFIX
));
324 ret
= tdb_unpack(dbuf
.dptr
, dbuf
.dsize
, "ddff",
325 &map
.gid
, &map
.sid_name_use
, &map
.nt_name
, &map
.comment
);
327 SAFE_FREE(dbuf
.dptr
);
330 DEBUG(3,("enum_group_mapping: tdb_unpack failure\n"));
334 /* list only the type or everything if UNKNOWN */
335 if (sid_name_use
!=SID_NAME_UNKNOWN
&& sid_name_use
!=map
.sid_name_use
) {
336 DEBUG(11,("enum_group_mapping: group %s is not of the requested type\n", map
.nt_name
));
340 if (unix_only
==ENUM_ONLY_MAPPED
&& map
.gid
==-1) {
341 DEBUG(11,("enum_group_mapping: group %s is non mapped\n", map
.nt_name
));
345 string_to_sid(&grpsid
, string_sid
);
346 sid_copy( &map
.sid
, &grpsid
);
348 sid_split_rid( &grpsid
, &rid
);
350 /* Only check the domain if we were given one */
352 if ( domsid
&& !sid_equal( domsid
, &grpsid
) ) {
353 DEBUG(11,("enum_group_mapping: group %s is not in "
354 "domain %s\n", string_sid
,
355 sid_string_dbg(domsid
)));
359 DEBUG(11,("enum_group_mapping: returning group %s of "
360 "type %s\n", map
.nt_name
,
361 sid_type_lookup(map
.sid_name_use
)));
363 (*pp_rmap
) = SMB_REALLOC_ARRAY((*pp_rmap
), GROUP_MAP
, entries
+1);
365 DEBUG(0,("enum_group_mapping: Unable to enlarge group map!\n"));
371 mapt
[entries
].gid
= map
.gid
;
372 sid_copy( &mapt
[entries
].sid
, &map
.sid
);
373 mapt
[entries
].sid_name_use
= map
.sid_name_use
;
374 fstrcpy(mapt
[entries
].nt_name
, map
.nt_name
);
375 fstrcpy(mapt
[entries
].comment
, map
.comment
);
381 *p_num_entries
=entries
;
386 /* This operation happens on session setup, so it should better be fast. We
387 * store a list of aliases a SID is member of hanging off MEMBEROF/SID. */
389 static NTSTATUS
one_alias_membership(const DOM_SID
*member
,
390 DOM_SID
**sids
, size_t *num
)
397 NTSTATUS status
= NT_STATUS_OK
;
400 slprintf(key
, sizeof(key
), "%s%s", MEMBEROF_PREFIX
,
401 sid_to_fstring(tmp
, member
));
403 dbuf
= tdb_fetch_bystring(tdb
, key
);
405 if (dbuf
.dptr
== NULL
) {
409 p
= (const char *)dbuf
.dptr
;
410 frame
= talloc_stackframe();
411 while (next_token_talloc(frame
, &p
, &string_sid
, " ")) {
414 if (!string_to_sid(&alias
, string_sid
))
417 status
= add_sid_to_array_unique(NULL
, &alias
, sids
, num
);
418 if (!NT_STATUS_IS_OK(status
)) {
425 SAFE_FREE(dbuf
.dptr
);
429 static NTSTATUS
alias_memberships(const DOM_SID
*members
, size_t num_members
,
430 DOM_SID
**sids
, size_t *num
)
437 for (i
=0; i
<num_members
; i
++) {
438 NTSTATUS status
= one_alias_membership(&members
[i
], sids
, num
);
439 if (!NT_STATUS_IS_OK(status
))
445 static bool is_aliasmem(const DOM_SID
*alias
, const DOM_SID
*member
)
450 /* This feels the wrong way round, but the on-disk data structure
451 * dictates it this way. */
452 if (!NT_STATUS_IS_OK(alias_memberships(member
, 1, &sids
, &num
)))
455 for (i
=0; i
<num
; i
++) {
456 if (sid_compare(alias
, &sids
[i
]) == 0) {
466 static NTSTATUS
add_aliasmem(const DOM_SID
*alias
, const DOM_SID
*member
)
472 char *new_memberstring
;
475 if (!get_group_map_from_sid(*alias
, &map
))
476 return NT_STATUS_NO_SUCH_ALIAS
;
478 if ( (map
.sid_name_use
!= SID_NAME_ALIAS
) &&
479 (map
.sid_name_use
!= SID_NAME_WKN_GRP
) )
480 return NT_STATUS_NO_SUCH_ALIAS
;
482 if (is_aliasmem(alias
, member
))
483 return NT_STATUS_MEMBER_IN_ALIAS
;
485 sid_to_fstring(string_sid
, member
);
486 if (asprintf(&key
, "%s%s", MEMBEROF_PREFIX
, string_sid
) < 0) {
487 return NT_STATUS_NO_MEMORY
;
490 dbuf
= tdb_fetch_bystring(tdb
, key
);
492 sid_to_fstring(string_sid
, alias
);
494 if (dbuf
.dptr
!= NULL
) {
495 asprintf(&new_memberstring
, "%s %s", (char *)(dbuf
.dptr
),
498 new_memberstring
= SMB_STRDUP(string_sid
);
501 if (new_memberstring
== NULL
) {
503 return NT_STATUS_NO_MEMORY
;
506 SAFE_FREE(dbuf
.dptr
);
507 dbuf
= string_term_tdb_data(new_memberstring
);
509 result
= tdb_store_bystring(tdb
, key
, dbuf
, 0);
511 SAFE_FREE(new_memberstring
);
514 return (result
== 0 ? NT_STATUS_OK
: NT_STATUS_ACCESS_DENIED
);
517 struct aliasmem_closure
{
518 const DOM_SID
*alias
;
523 static int collect_aliasmem(TDB_CONTEXT
*tdb_ctx
, TDB_DATA key
, TDB_DATA data
,
526 struct aliasmem_closure
*closure
= (struct aliasmem_closure
*)state
;
531 if (strncmp((const char *)key
.dptr
, MEMBEROF_PREFIX
,
532 strlen(MEMBEROF_PREFIX
)) != 0)
535 p
= (const char *)data
.dptr
;
537 frame
= talloc_stackframe();
538 while (next_token_talloc(frame
, &p
, &alias_string
, " ")) {
539 DOM_SID alias
, member
;
540 const char *member_string
;
542 if (!string_to_sid(&alias
, alias_string
))
545 if (sid_compare(closure
->alias
, &alias
) != 0)
548 /* Ok, we found the alias we're looking for in the membership
549 * list currently scanned. The key represents the alias
550 * member. Add that. */
552 member_string
= strchr((const char *)key
.dptr
, '/');
554 /* Above we tested for MEMBEROF_PREFIX which includes the
557 SMB_ASSERT(member_string
!= NULL
);
560 if (!string_to_sid(&member
, member_string
))
563 if (!NT_STATUS_IS_OK(add_sid_to_array(NULL
, &member
,
576 static NTSTATUS
enum_aliasmem(const DOM_SID
*alias
, DOM_SID
**sids
, size_t *num
)
579 struct aliasmem_closure closure
;
581 if (!get_group_map_from_sid(*alias
, &map
))
582 return NT_STATUS_NO_SUCH_ALIAS
;
584 if ( (map
.sid_name_use
!= SID_NAME_ALIAS
) &&
585 (map
.sid_name_use
!= SID_NAME_WKN_GRP
) )
586 return NT_STATUS_NO_SUCH_ALIAS
;
591 closure
.alias
= alias
;
595 tdb_traverse(tdb
, collect_aliasmem
, &closure
);
599 static NTSTATUS
del_aliasmem(const DOM_SID
*alias
, const DOM_SID
*member
)
610 result
= alias_memberships(member
, 1, &sids
, &num
);
612 if (!NT_STATUS_IS_OK(result
))
615 for (i
=0; i
<num
; i
++) {
616 if (sid_compare(&sids
[i
], alias
) == 0) {
624 return NT_STATUS_MEMBER_NOT_IN_ALIAS
;
628 sids
[i
] = sids
[num
-1];
632 sid_to_fstring(sid_string
, member
);
633 if (asprintf(&key
, "%s%s", MEMBEROF_PREFIX
, sid_string
) < 0) {
635 return NT_STATUS_NO_MEMORY
;
639 NTSTATUS ret
= (tdb_delete_bystring(tdb
, key
) == 0 ?
640 NT_STATUS_OK
: NT_STATUS_UNSUCCESSFUL
);
646 member_string
= SMB_STRDUP("");
648 if (member_string
== NULL
) {
651 return NT_STATUS_NO_MEMORY
;
654 for (i
=0; i
<num
; i
++) {
655 char *s
= member_string
;
657 sid_to_fstring(sid_string
, &sids
[i
]);
658 asprintf(&member_string
, "%s %s", s
, sid_string
);
661 if (member_string
== NULL
) {
664 return NT_STATUS_NO_MEMORY
;
668 dbuf
= string_term_tdb_data(member_string
);
670 result
= tdb_store_bystring(tdb
, key
, dbuf
, 0) == 0 ?
671 NT_STATUS_OK
: NT_STATUS_ACCESS_DENIED
;
674 SAFE_FREE(member_string
);
681 static const struct mapping_backend tdb_backend
= {
682 .add_mapping_entry
= add_mapping_entry
,
683 .get_group_map_from_sid
= get_group_map_from_sid
,
684 .get_group_map_from_gid
= get_group_map_from_gid
,
685 .get_group_map_from_ntname
= get_group_map_from_ntname
,
686 .group_map_remove
= group_map_remove
,
687 .enum_group_mapping
= enum_group_mapping
,
688 .one_alias_membership
= one_alias_membership
,
689 .add_aliasmem
= add_aliasmem
,
690 .del_aliasmem
= del_aliasmem
,
691 .enum_aliasmem
= enum_aliasmem
695 initialise the tdb mapping backend
697 const struct mapping_backend
*groupdb_tdb_init(void)
699 if (!init_group_mapping()) {
700 DEBUG(0,("Failed to initialise tdb mapping backend\n"));