2 * Unix SMB/CIFS implementation.
4 * Id mapping using LDAP records as defined in RFC 2307
6 * The SID<->uid/gid mapping is performed in two steps: 1) Query the
7 * AD server for the name<->sid mapping. 2) Query an LDAP server
8 * according to RFC 2307 for the name<->uid/gid mapping.
10 * Copyright (C) Christof Schmitt 2012,2013
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 3 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <http://www.gnu.org/licenses/>.
28 #include "winbindd_ads.h"
31 #include "nsswitch/winbind_client.h"
32 #include "lib/winbind_util.h"
35 * Config and connection info per domain.
37 struct idmap_rfc2307_context
{
38 const char *bind_path_user
;
39 const char *bind_path_group
;
40 const char *ldap_domain
;
45 * Pointer to ldap struct in ads or smbldap_state, has to be
46 * updated after connecting to server
50 /* Optional function to check connection to server */
51 NTSTATUS (*check_connection
)(struct idmap_domain
*dom
);
53 /* Issue ldap query */
54 NTSTATUS (*search
)(struct idmap_rfc2307_context
*ctx
,
55 const char *bind_path
, const char *expr
,
56 const char **attrs
, LDAPMessage
**res
);
58 /* Access to LDAP in AD server */
61 /* Access to stand-alone LDAP server */
62 struct smbldap_state
*smbldap_state
;
66 * backend functions for LDAP queries through ADS
69 static NTSTATUS
idmap_rfc2307_ads_check_connection(struct idmap_domain
*dom
)
71 struct idmap_rfc2307_context
*ctx
;
72 const char *dom_name
= dom
->name
;
75 DEBUG(10, ("ad_idmap_cached_connection: called for domain '%s'\n",
78 ctx
= talloc_get_type(dom
->private_data
, struct idmap_rfc2307_context
);
79 dom_name
= ctx
->ldap_domain
? ctx
->ldap_domain
: dom
->name
;
81 status
= ads_idmap_cached_connection(&ctx
->ads
, dom_name
);
82 if (ADS_ERR_OK(status
)) {
83 ctx
->ldap
= ctx
->ads
->ldap
.ld
;
85 DEBUG(1, ("Could not connect to domain %s: %s\n", dom
->name
,
89 return ads_ntstatus(status
);
92 static NTSTATUS
idmap_rfc2307_ads_search(struct idmap_rfc2307_context
*ctx
,
93 const char *bind_path
,
100 status
= ads_do_search_retry(ctx
->ads
, bind_path
,
101 LDAP_SCOPE_SUBTREE
, expr
, attrs
, result
);
103 if (!ADS_ERR_OK(status
)) {
104 return ads_ntstatus(status
);
107 ctx
->ldap
= ctx
->ads
->ldap
.ld
;
108 return ads_ntstatus(status
);
111 static NTSTATUS
idmap_rfc2307_init_ads(struct idmap_rfc2307_context
*ctx
,
112 const char *domain_name
)
114 const char *ldap_domain
;
116 ctx
->search
= idmap_rfc2307_ads_search
;
117 ctx
->check_connection
= idmap_rfc2307_ads_check_connection
;
119 ldap_domain
= idmap_config_const_string(domain_name
, "ldap_domain",
122 ctx
->ldap_domain
= talloc_strdup(ctx
, ldap_domain
);
123 if (ctx
->ldap_domain
== NULL
) {
124 return NT_STATUS_NO_MEMORY
;
132 * backend function for LDAP queries through stand-alone LDAP server
135 static NTSTATUS
idmap_rfc2307_ldap_search(struct idmap_rfc2307_context
*ctx
,
136 const char *bind_path
,
139 LDAPMessage
**result
)
143 ret
= smbldap_search(ctx
->smbldap_state
, bind_path
, LDAP_SCOPE_SUBTREE
,
144 expr
, attrs
, 0, result
);
145 ctx
->ldap
= smbldap_get_ldap(ctx
->smbldap_state
);
147 if (ret
== LDAP_SUCCESS
) {
151 return NT_STATUS_LDAP(ret
);
154 static bool idmap_rfc2307_get_uint32(LDAP
*ldap
, LDAPMessage
*entry
,
155 const char *field
, uint32_t *value
)
160 b
= smbldap_get_single_attribute(ldap
, entry
, field
, str
, sizeof(str
));
169 static NTSTATUS
idmap_rfc2307_init_ldap(struct idmap_rfc2307_context
*ctx
,
170 const char *domain_name
)
175 const char *ldap_url
, *user_dn
;
176 TALLOC_CTX
*mem_ctx
= ctx
;
178 ldap_url
= idmap_config_const_string(domain_name
, "ldap_url", NULL
);
180 DEBUG(1, ("ERROR: missing idmap ldap url\n"));
181 return NT_STATUS_UNSUCCESSFUL
;
184 url
= talloc_strdup(talloc_tos(), ldap_url
);
186 user_dn
= idmap_config_const_string(domain_name
, "ldap_user_dn", NULL
);
188 secret
= idmap_fetch_secret("ldap", domain_name
, user_dn
);
190 ret
= NT_STATUS_ACCESS_DENIED
;
195 /* assume anonymous if we don't have a specified user */
196 ret
= smbldap_init(mem_ctx
, winbind_event_context(), url
,
197 (user_dn
== NULL
), user_dn
, secret
,
198 &ctx
->smbldap_state
);
200 if (!NT_STATUS_IS_OK(ret
)) {
201 DEBUG(1, ("ERROR: smbldap_init (%s) failed!\n", url
));
205 ctx
->search
= idmap_rfc2307_ldap_search
;
213 * common code for stand-alone LDAP and ADS
216 static void idmap_rfc2307_map_sid_results(struct idmap_rfc2307_context
*ctx
,
220 const char *dom_name
,
221 const char **attrs
, int type
)
226 count
= ldap_count_entries(ctx
->ldap
, result
);
228 for (i
= 0; i
< count
; i
++) {
230 enum lsa_SidType lsa_type
;
236 entry
= ldap_first_entry(ctx
->ldap
, result
);
238 entry
= ldap_next_entry(ctx
->ldap
, entry
);
241 DEBUG(2, ("Unable to fetch entry.\n"));
245 name
= smbldap_talloc_single_attribute(ctx
->ldap
, entry
,
248 DEBUG(1, ("Could not get user name\n"));
252 b
= idmap_rfc2307_get_uint32(ctx
->ldap
, entry
, attrs
[1], &id
);
254 DEBUG(1, ("Could not pull id for record %s\n", name
));
258 map
= idmap_find_map_by_id(ids
, type
, id
);
260 DEBUG(1, ("Could not find id %d, name %s\n", id
, name
));
264 if (ctx
->realm
!= NULL
) {
265 /* Strip @realm from user or group name */
268 delim
= strchr(name
, '@');
274 /* by default calls to winbindd are disabled
275 the following call will not recurse so this is safe */
277 /* Lookup name from PDC using lsa_lookup_names() */
278 b
= winbind_lookup_name(dom_name
, name
, map
->sid
, &lsa_type
);
282 DEBUG(1, ("SID lookup failed for id %d, %s\n",
287 if (type
== ID_TYPE_UID
&& lsa_type
!= SID_NAME_USER
) {
288 DEBUG(1, ("Wrong type %d for user name %s\n",
293 if (type
== ID_TYPE_GID
&& lsa_type
!= SID_NAME_DOM_GRP
&&
294 lsa_type
!= SID_NAME_ALIAS
&&
295 lsa_type
!= SID_NAME_WKN_GRP
) {
296 DEBUG(1, ("Wrong type %d for group name %s\n",
301 map
->status
= ID_MAPPED
;
306 * Map unixids to names and then to sids.
308 static NTSTATUS
idmap_rfc2307_unixids_to_sids(struct idmap_domain
*dom
,
311 struct idmap_rfc2307_context
*ctx
;
312 char *fltr_usr
= NULL
, *fltr_grp
= NULL
;
314 int cnt_usr
= 0, cnt_grp
= 0, idx
= 0, bidx
= 0;
315 LDAPMessage
*result
= NULL
;
318 ctx
= talloc_get_type(dom
->private_data
, struct idmap_rfc2307_context
);
319 mem_ctx
= talloc_new(ctx
);
321 return NT_STATUS_NO_MEMORY
;
324 if (ctx
->check_connection
) {
325 ret
= ctx
->check_connection(dom
);
326 if (!NT_STATUS_IS_OK(ret
)) {
335 /* prepare new user query, see getpwuid() in RFC2307 */
336 fltr_usr
= talloc_asprintf(mem_ctx
,
337 "(&(objectClass=posixAccount)(|");
341 /* prepare new group query, see getgrgid() in RFC2307 */
342 fltr_grp
= talloc_asprintf(mem_ctx
,
343 "(&(objectClass=posixGroup)(|");
346 if (!fltr_usr
|| !fltr_grp
) {
347 ret
= NT_STATUS_NO_MEMORY
;
351 while (cnt_usr
< IDMAP_LDAP_MAX_IDS
&&
352 cnt_grp
< IDMAP_LDAP_MAX_IDS
&& ids
[idx
]) {
354 switch (ids
[idx
]->xid
.type
) {
356 fltr_usr
= talloc_asprintf_append_buffer(fltr_usr
,
357 "(uidNumber=%d)", ids
[idx
]->xid
.id
);
361 fltr_grp
= talloc_asprintf_append_buffer(fltr_grp
,
362 "(gidNumber=%d)", ids
[idx
]->xid
.id
);
366 DEBUG(3, ("Error: unknown ID type %d\n",
367 ids
[idx
]->xid
.type
));
368 ret
= NT_STATUS_UNSUCCESSFUL
;
372 if (!fltr_usr
|| !fltr_grp
) {
373 ret
= NT_STATUS_NO_MEMORY
;
380 if (cnt_usr
== IDMAP_LDAP_MAX_IDS
|| (cnt_usr
!= 0 && !ids
[idx
])) {
381 const char *attrs
[] = { NULL
, /* uid or cn */
385 fltr_usr
= talloc_strdup_append(fltr_usr
, "))");
387 ret
= NT_STATUS_NO_MEMORY
;
391 attrs
[0] = ctx
->user_cn
? "cn" : "uid";
392 ret
= ctx
->search(ctx
, ctx
->bind_path_user
, fltr_usr
, attrs
,
394 if (!NT_STATUS_IS_OK(ret
)) {
398 idmap_rfc2307_map_sid_results(ctx
, mem_ctx
, &ids
[bidx
], result
,
399 dom
->name
, attrs
, ID_TYPE_UID
);
401 TALLOC_FREE(fltr_usr
);
404 if (cnt_grp
== IDMAP_LDAP_MAX_IDS
|| (cnt_grp
!= 0 && !ids
[idx
])) {
405 const char *attrs
[] = { "cn", "gidNumber", NULL
};
407 fltr_grp
= talloc_strdup_append(fltr_grp
, "))");
409 ret
= NT_STATUS_NO_MEMORY
;
412 ret
= ctx
->search(ctx
, ctx
->bind_path_group
, fltr_grp
, attrs
,
414 if (!NT_STATUS_IS_OK(ret
)) {
418 idmap_rfc2307_map_sid_results(ctx
, mem_ctx
, &ids
[bidx
], result
,
419 dom
->name
, attrs
, ID_TYPE_GID
);
421 TALLOC_FREE(fltr_grp
);
431 talloc_free(mem_ctx
);
435 struct idmap_rfc2307_map
{
442 * Lookup names for SIDS and store the data in the local mapping
445 static NTSTATUS
idmap_rfc_2307_sids_to_names(TALLOC_CTX
*mem_ctx
,
447 struct idmap_rfc2307_map
*maps
,
448 struct idmap_rfc2307_context
*ctx
)
452 for (i
= 0; ids
[i
]; i
++) {
453 const char *domain
, *name
;
454 enum lsa_SidType lsa_type
;
455 struct id_map
*id
= ids
[i
];
456 struct idmap_rfc2307_map
*map
= &maps
[i
];
459 /* by default calls to winbindd are disabled
460 the following call will not recurse so this is safe */
462 b
= winbind_lookup_sid(mem_ctx
, ids
[i
]->sid
, &domain
, &name
,
467 DEBUG(1, ("Lookup sid %s failed.\n",
468 sid_string_dbg(ids
[i
]->sid
)));
474 id
->xid
.type
= map
->type
= ID_TYPE_UID
;
475 if (ctx
->user_cn
&& ctx
->realm
!= NULL
) {
476 name
= talloc_asprintf(mem_ctx
, "%s@%s",
479 id
->xid
.type
= map
->type
= ID_TYPE_UID
;
482 case SID_NAME_DOM_GRP
:
484 case SID_NAME_WKN_GRP
:
485 if (ctx
->realm
!= NULL
) {
486 name
= talloc_asprintf(mem_ctx
, "%s@%s",
489 id
->xid
.type
= map
->type
= ID_TYPE_GID
;
493 DEBUG(1, ("Unknown lsa type %d for sid %s\n",
494 lsa_type
, sid_string_dbg(id
->sid
)));
495 id
->status
= ID_UNMAPPED
;
500 id
->status
= ID_UNKNOWN
;
501 map
->name
= strupper_talloc(mem_ctx
, name
);
504 return NT_STATUS_NO_MEMORY
;
512 * Find id_map entry by looking up the name in the internal
515 static struct id_map
* idmap_rfc2307_find_map(struct idmap_rfc2307_map
*maps
,
521 DEBUG(10, ("Looking for name %s, type %d\n", name
, type
));
523 for (i
= 0; maps
[i
].map
!= NULL
; i
++) {
524 DEBUG(10, ("Entry %d: name %s, type %d\n",
525 i
, maps
[i
].name
, maps
[i
].type
));
526 if (type
== maps
[i
].type
&& strcmp(name
, maps
[i
].name
) == 0) {
534 static void idmap_rfc2307_map_xid_results(struct idmap_rfc2307_context
*ctx
,
536 struct idmap_rfc2307_map
*maps
,
538 struct idmap_domain
*dom
,
539 const char **attrs
, enum id_type type
)
544 count
= ldap_count_entries(ctx
->ldap
, result
);
546 for (i
= 0; i
< count
; i
++) {
550 struct id_map
*id_map
;
553 entry
= ldap_first_entry(ctx
->ldap
, result
);
555 entry
= ldap_next_entry(ctx
->ldap
, entry
);
558 DEBUG(2, ("Unable to fetch entry.\n"));
562 name
= smbldap_talloc_single_attribute(ctx
->ldap
, entry
,
565 DEBUG(1, ("Could not get user name\n"));
569 b
= idmap_rfc2307_get_uint32(ctx
->ldap
, entry
, attrs
[1], &id
);
571 DEBUG(5, ("Could not pull id for record %s\n", name
));
575 if (!idmap_unix_id_is_in_range(id
, dom
)) {
576 DEBUG(5, ("Requested id (%u) out of range (%u - %u).\n",
577 id
, dom
->low_id
, dom
->high_id
));
581 if (!strupper_m(name
)) {
582 DEBUG(5, ("Could not convert %s to uppercase\n", name
));
585 id_map
= idmap_rfc2307_find_map(maps
, type
, name
);
587 DEBUG(0, ("Could not find mapping entry for name %s\n",
593 id_map
->status
= ID_MAPPED
;
598 * Map sids to names and then to unixids.
600 static NTSTATUS
idmap_rfc2307_sids_to_unixids(struct idmap_domain
*dom
,
603 struct idmap_rfc2307_context
*ctx
;
605 struct idmap_rfc2307_map
*int_maps
;
606 int cnt_usr
= 0, cnt_grp
= 0, idx
= 0;
607 char *fltr_usr
= NULL
, *fltr_grp
= NULL
;
611 ctx
= talloc_get_type(dom
->private_data
, struct idmap_rfc2307_context
);
612 mem_ctx
= talloc_new(talloc_tos());
614 return NT_STATUS_NO_MEMORY
;
617 if (ctx
->check_connection
) {
618 ret
= ctx
->check_connection(dom
);
619 if (!NT_STATUS_IS_OK(ret
)) {
624 for (i
= 0; ids
[i
]; i
++);
625 int_maps
= talloc_zero_array(mem_ctx
, struct idmap_rfc2307_map
, i
);
627 ret
= NT_STATUS_NO_MEMORY
;
631 ret
= idmap_rfc_2307_sids_to_names(mem_ctx
, ids
, int_maps
, ctx
);
632 if (!NT_STATUS_IS_OK(ret
)) {
638 /* prepare new user query, see getpwuid() in RFC2307 */
639 fltr_usr
= talloc_asprintf(mem_ctx
,
640 "(&(objectClass=posixAccount)(|");
644 /* prepare new group query, see getgrgid() in RFC2307 */
645 fltr_grp
= talloc_asprintf(mem_ctx
,
646 "(&(objectClass=posixGroup)(|");
649 if (!fltr_usr
|| !fltr_grp
) {
650 ret
= NT_STATUS_NO_MEMORY
;
654 while (cnt_usr
< IDMAP_LDAP_MAX_IDS
&&
655 cnt_grp
< IDMAP_LDAP_MAX_IDS
&& ids
[idx
]) {
656 struct id_map
*id
= ids
[idx
];
657 struct idmap_rfc2307_map
*map
= &int_maps
[idx
];
659 switch(id
->xid
.type
) {
661 fltr_usr
= talloc_asprintf_append_buffer(fltr_usr
,
662 "(%s=%s)", (ctx
->user_cn
? "cn" : "uid"),
668 fltr_grp
= talloc_asprintf_append_buffer(fltr_grp
,
669 "(cn=%s)", map
->name
);
677 if (!fltr_usr
|| !fltr_grp
) {
678 ret
= NT_STATUS_NO_MEMORY
;
685 if (cnt_usr
== IDMAP_LDAP_MAX_IDS
|| (cnt_usr
!= 0 && !ids
[idx
])) {
686 const char *attrs
[] = { NULL
, /* uid or cn */
691 fltr_usr
= talloc_strdup_append(fltr_usr
, "))");
693 ret
= NT_STATUS_NO_MEMORY
;
697 attrs
[0] = ctx
->user_cn
? "cn" : "uid";
698 ret
= ctx
->search(ctx
, ctx
->bind_path_user
, fltr_usr
, attrs
,
700 if (!NT_STATUS_IS_OK(ret
)) {
704 idmap_rfc2307_map_xid_results(ctx
, mem_ctx
, int_maps
,
705 result
, dom
, attrs
, ID_TYPE_UID
);
708 TALLOC_FREE(fltr_usr
);
711 if (cnt_grp
== IDMAP_LDAP_MAX_IDS
|| (cnt_grp
!= 0 && !ids
[idx
])) {
712 const char *attrs
[] = {"cn", "gidNumber", NULL
};
715 fltr_grp
= talloc_strdup_append(fltr_grp
, "))");
717 ret
= NT_STATUS_NO_MEMORY
;
721 ret
= ctx
->search(ctx
, ctx
->bind_path_group
, fltr_grp
, attrs
,
723 if (!NT_STATUS_IS_OK(ret
)) {
727 idmap_rfc2307_map_xid_results(ctx
, mem_ctx
, int_maps
, result
,
728 dom
, attrs
, ID_TYPE_GID
);
730 TALLOC_FREE(fltr_grp
);
740 talloc_free(mem_ctx
);
744 static int idmap_rfc2307_context_destructor(struct idmap_rfc2307_context
*ctx
)
746 if (ctx
->ads
!= NULL
) {
747 /* we own this ADS_STRUCT so make sure it goes away */
748 ctx
->ads
->is_mine
= True
;
749 ads_destroy( &ctx
->ads
);
753 if (ctx
->smbldap_state
!= NULL
) {
754 smbldap_free_struct(&ctx
->smbldap_state
);
760 static NTSTATUS
idmap_rfc2307_initialize(struct idmap_domain
*domain
)
762 struct idmap_rfc2307_context
*ctx
;
763 const char *bind_path_user
, *bind_path_group
, *ldap_server
, *realm
;
766 ctx
= talloc_zero(domain
, struct idmap_rfc2307_context
);
768 return NT_STATUS_NO_MEMORY
;
770 talloc_set_destructor(ctx
, idmap_rfc2307_context_destructor
);
772 bind_path_user
= idmap_config_const_string(
773 domain
->name
, "bind_path_user", NULL
);
774 if (bind_path_user
== NULL
) {
775 status
= NT_STATUS_INVALID_PARAMETER
;
778 ctx
->bind_path_user
= talloc_strdup(ctx
, bind_path_user
);
779 if (ctx
->bind_path_user
== NULL
) {
780 status
= NT_STATUS_NO_MEMORY
;
784 bind_path_group
= idmap_config_const_string(
785 domain
->name
, "bind_path_group", NULL
);
786 if (bind_path_group
== NULL
) {
787 status
= NT_STATUS_INVALID_PARAMETER
;
790 ctx
->bind_path_group
= talloc_strdup(ctx
, bind_path_group
);
791 if (ctx
->bind_path_group
== NULL
) {
792 status
= NT_STATUS_NO_MEMORY
;
796 ldap_server
= idmap_config_const_string(
797 domain
->name
, "ldap_server", NULL
);
799 status
= NT_STATUS_INVALID_PARAMETER
;
803 if (strcmp(ldap_server
, "stand-alone") == 0) {
804 status
= idmap_rfc2307_init_ldap(ctx
, domain
->name
);
806 } else if (strcmp(ldap_server
, "ad") == 0) {
807 status
= idmap_rfc2307_init_ads(ctx
, domain
->name
);
810 status
= NT_STATUS_INVALID_PARAMETER
;
813 if (!NT_STATUS_IS_OK(status
)) {
817 realm
= idmap_config_const_string(domain
->name
, "realm", NULL
);
819 ctx
->realm
= talloc_strdup(ctx
, realm
);
820 if (ctx
->realm
== NULL
) {
821 status
= NT_STATUS_NO_MEMORY
;
826 ctx
->user_cn
= idmap_config_bool(domain
->name
, "user_cn", false);
828 domain
->private_data
= ctx
;
836 static struct idmap_methods rfc2307_methods
= {
837 .init
= idmap_rfc2307_initialize
,
838 .unixids_to_sids
= idmap_rfc2307_unixids_to_sids
,
839 .sids_to_unixids
= idmap_rfc2307_sids_to_unixids
,
843 NTSTATUS
idmap_rfc2307_init(TALLOC_CTX
*ctx
)
845 return smb_register_idmap(SMB_IDMAP_INTERFACE_VERSION
, "rfc2307",