Line data Source code
1 : /*
2 : Unix SMB/CIFS implementation.
3 :
4 : Map SIDs to unixids and back
5 :
6 : Copyright (C) Kai Blin 2008
7 : Copyright (C) Andrew Bartlett 2012
8 :
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.
13 :
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.
18 :
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/>.
21 : */
22 :
23 : #include "includes.h"
24 : #include "auth/auth.h"
25 : #include "librpc/gen_ndr/ndr_security.h"
26 : #include "lib/util_unixsids.h"
27 : #include <ldb.h>
28 : #include "ldb_wrap.h"
29 : #include "param/param.h"
30 : #include "winbind/idmap.h"
31 : #include "libcli/security/security.h"
32 : #include "libcli/ldap/ldap_ndr.h"
33 : #include "dsdb/samdb/samdb.h"
34 : #include "../libds/common/flags.h"
35 :
36 : /**
37 : * Get uid/gid bounds from idmap database
38 : *
39 : * \param idmap_ctx idmap context to use
40 : * \param low lower uid/gid bound is stored here
41 : * \param high upper uid/gid bound is stored here
42 : * \return 0 on success, nonzero on failure
43 : */
44 720 : static int idmap_get_bounds(struct idmap_context *idmap_ctx, uint32_t *low,
45 : uint32_t *high)
46 : {
47 720 : int ret = -1;
48 720 : struct ldb_context *ldb = idmap_ctx->ldb_ctx;
49 50 : struct ldb_dn *dn;
50 720 : struct ldb_result *res = NULL;
51 720 : TALLOC_CTX *tmp_ctx = talloc_new(idmap_ctx);
52 720 : uint32_t lower_bound = (uint32_t) -1;
53 720 : uint32_t upper_bound = (uint32_t) -1;
54 :
55 720 : dn = ldb_dn_new(tmp_ctx, ldb, "CN=CONFIG");
56 720 : if (dn == NULL) goto failed;
57 :
58 720 : ret = ldb_search(ldb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, NULL, NULL);
59 720 : if (ret != LDB_SUCCESS) goto failed;
60 :
61 720 : if (res->count != 1) {
62 0 : ret = -1;
63 0 : goto failed;
64 : }
65 :
66 720 : lower_bound = ldb_msg_find_attr_as_uint(res->msgs[0], "lowerBound", -1);
67 720 : if (lower_bound != (uint32_t) -1) {
68 720 : ret = LDB_SUCCESS;
69 : } else {
70 0 : ret = -1;
71 0 : goto failed;
72 : }
73 :
74 720 : upper_bound = ldb_msg_find_attr_as_uint(res->msgs[0], "upperBound", -1);
75 720 : if (upper_bound != (uint32_t) -1) {
76 670 : ret = LDB_SUCCESS;
77 : } else {
78 0 : ret = -1;
79 : }
80 :
81 720 : failed:
82 720 : talloc_free(tmp_ctx);
83 720 : *low = lower_bound;
84 720 : *high = upper_bound;
85 720 : return ret;
86 : }
87 :
88 : /**
89 : * Add a dom_sid structure to a ldb_message
90 : * \param idmap_ctx idmap context to use
91 : * \param mem_ctx talloc context to use
92 : * \param ldb_message ldb message to add dom_sid to
93 : * \param attr_name name of the attribute to store the dom_sid in
94 : * \param sid dom_sid to store
95 : * \return 0 on success, an ldb error code on failure.
96 : */
97 720 : static int idmap_msg_add_dom_sid(struct idmap_context *idmap_ctx,
98 : TALLOC_CTX *mem_ctx, struct ldb_message *msg,
99 : const char *attr_name, const struct dom_sid *sid)
100 : {
101 50 : struct ldb_val val;
102 50 : enum ndr_err_code ndr_err;
103 :
104 720 : ndr_err = ndr_push_struct_blob(&val, mem_ctx, sid,
105 : (ndr_push_flags_fn_t)ndr_push_dom_sid);
106 :
107 720 : if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
108 0 : return -1;
109 : }
110 :
111 720 : return ldb_msg_add_value(msg, attr_name, &val, NULL);
112 : }
113 :
114 : /**
115 : * Get a dom_sid structure from a ldb message.
116 : *
117 : * \param mem_ctx talloc context to allocate dom_sid memory in
118 : * \param msg ldb_message to get dom_sid from
119 : * \param attr_name key that has the dom_sid as data
120 : * \return dom_sid structure on success, NULL on failure
121 : */
122 76 : static struct dom_sid *idmap_msg_get_dom_sid(TALLOC_CTX *mem_ctx,
123 : struct ldb_message *msg, const char *attr_name)
124 : {
125 2 : struct dom_sid *sid;
126 2 : const struct ldb_val *val;
127 2 : enum ndr_err_code ndr_err;
128 :
129 76 : val = ldb_msg_find_ldb_val(msg, attr_name);
130 76 : if (val == NULL) {
131 0 : return NULL;
132 : }
133 :
134 76 : sid = talloc(mem_ctx, struct dom_sid);
135 76 : if (sid == NULL) {
136 0 : return NULL;
137 : }
138 :
139 76 : ndr_err = ndr_pull_struct_blob(val, sid, sid,
140 : (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
141 76 : if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
142 0 : talloc_free(sid);
143 0 : return NULL;
144 : }
145 :
146 74 : return sid;
147 : }
148 :
149 : /**
150 : * Initialize idmap context
151 : *
152 : * talloc_free to close.
153 : *
154 : * \param mem_ctx talloc context to use.
155 : * \return allocated idmap_context on success, NULL on error
156 : */
157 10184 : struct idmap_context *idmap_init(TALLOC_CTX *mem_ctx,
158 : struct tevent_context *ev_ctx,
159 : struct loadparm_context *lp_ctx)
160 : {
161 860 : struct idmap_context *idmap_ctx;
162 :
163 10184 : idmap_ctx = talloc(mem_ctx, struct idmap_context);
164 10184 : if (idmap_ctx == NULL) {
165 0 : return NULL;
166 : }
167 :
168 10184 : idmap_ctx->lp_ctx = lp_ctx;
169 :
170 10184 : idmap_ctx->ldb_ctx = ldb_wrap_connect(idmap_ctx, ev_ctx, lp_ctx,
171 : "idmap.ldb",
172 : system_session(lp_ctx),
173 : NULL, 0);
174 10184 : if (idmap_ctx->ldb_ctx == NULL) {
175 0 : goto fail;
176 : }
177 :
178 10184 : idmap_ctx->samdb = samdb_connect(idmap_ctx,
179 : ev_ctx,
180 : lp_ctx,
181 : system_session(lp_ctx),
182 : NULL,
183 : 0);
184 10184 : if (idmap_ctx->samdb == NULL) {
185 0 : DEBUG(0, ("Failed to load sam.ldb in idmap_init\n"));
186 0 : goto fail;
187 : }
188 :
189 9324 : return idmap_ctx;
190 0 : fail:
191 0 : TALLOC_FREE(idmap_ctx);
192 0 : return NULL;
193 : }
194 :
195 : /**
196 : * Convert an unixid to the corresponding SID
197 : *
198 : * \param idmap_ctx idmap context to use
199 : * \param mem_ctx talloc context the memory for the struct dom_sid is allocated
200 : * from.
201 : * \param unixid pointer to a unixid struct to convert
202 : * \param sid pointer that will take the struct dom_sid pointer if the mapping
203 : * succeeds.
204 : * \return NT_STATUS_OK on success, NT_STATUS_NONE_MAPPED if mapping not
205 : * possible or some other NTSTATUS that is more descriptive on failure.
206 : */
207 :
208 154 : static NTSTATUS idmap_xid_to_sid(struct idmap_context *idmap_ctx,
209 : TALLOC_CTX *mem_ctx,
210 : struct unixid *unixid,
211 : struct dom_sid **sid)
212 : {
213 8 : int ret;
214 8 : NTSTATUS status;
215 154 : struct ldb_context *ldb = idmap_ctx->ldb_ctx;
216 154 : struct ldb_result *res = NULL;
217 8 : struct ldb_message *msg;
218 8 : const struct dom_sid *unix_sid;
219 8 : struct dom_sid *new_sid;
220 154 : TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
221 8 : const char *id_type;
222 :
223 154 : const char *sam_attrs[] = {"objectSid", NULL};
224 :
225 : /*
226 : * First check against our local DB, to see if this user has a
227 : * mapping there. This means that the Samba4 AD DC behaves
228 : * much like a winbindd member server running idmap_ad
229 : */
230 :
231 154 : switch (unixid->type) {
232 81 : case ID_TYPE_UID:
233 81 : if (lpcfg_parm_bool(idmap_ctx->lp_ctx, NULL, "idmap_ldb", "use rfc2307", false)) {
234 79 : ret = dsdb_search_one(idmap_ctx->samdb, tmp_ctx, &msg,
235 : ldb_get_default_basedn(idmap_ctx->samdb),
236 : LDB_SCOPE_SUBTREE,
237 : sam_attrs, 0,
238 : "(&(|(sAMaccountType=%u)(sAMaccountType=%u)(sAMaccountType=%u))"
239 : "(uidNumber=%u)(objectSid=*))",
240 : ATYPE_ACCOUNT, ATYPE_WORKSTATION_TRUST, ATYPE_INTERDOMAIN_TRUST, unixid->id);
241 : } else {
242 : /* If we are not to use the rfc2307 attributes, we just emulate a non-match */
243 0 : ret = LDB_ERR_NO_SUCH_OBJECT;
244 : }
245 :
246 79 : if (ret == LDB_ERR_CONSTRAINT_VIOLATION) {
247 0 : DEBUG(1, ("Search for uidNumber=%lu gave duplicate results, failing to map to a SID!\n",
248 : (unsigned long)unixid->id));
249 0 : status = NT_STATUS_NONE_MAPPED;
250 0 : goto failed;
251 81 : } else if (ret == LDB_SUCCESS) {
252 0 : *sid = samdb_result_dom_sid(mem_ctx, msg, "objectSid");
253 0 : if (*sid == NULL) {
254 0 : DEBUG(1, ("Search for uidNumber=%lu did not return an objectSid!\n",
255 : (unsigned long)unixid->id));
256 0 : status = NT_STATUS_NONE_MAPPED;
257 0 : goto failed;
258 : }
259 0 : talloc_free(tmp_ctx);
260 0 : return NT_STATUS_OK;
261 81 : } else if (ret != LDB_ERR_NO_SUCH_OBJECT) {
262 0 : DEBUG(1, ("Search for uidNumber=%lu gave '%s', failing to map to a SID!\n",
263 : (unsigned long)unixid->id, ldb_errstring(idmap_ctx->samdb)));
264 0 : status = NT_STATUS_NONE_MAPPED;
265 0 : goto failed;
266 : }
267 :
268 77 : id_type = "ID_TYPE_UID";
269 77 : break;
270 73 : case ID_TYPE_GID:
271 73 : if (lpcfg_parm_bool(idmap_ctx->lp_ctx, NULL, "idmap_ldb", "use rfc2307", false)) {
272 71 : ret = dsdb_search_one(idmap_ctx->samdb, tmp_ctx, &msg,
273 : ldb_get_default_basedn(idmap_ctx->samdb),
274 : LDB_SCOPE_SUBTREE,
275 : sam_attrs, 0,
276 : "(&(|(sAMaccountType=%u)(sAMaccountType=%u))(gidNumber=%u))",
277 : ATYPE_SECURITY_GLOBAL_GROUP, ATYPE_SECURITY_LOCAL_GROUP,
278 : unixid->id);
279 : } else {
280 : /* If we are not to use the rfc2307 attributes, we just emulate a non-match */
281 0 : ret = LDB_ERR_NO_SUCH_OBJECT;
282 : }
283 71 : if (ret == LDB_ERR_CONSTRAINT_VIOLATION) {
284 0 : DEBUG(1, ("Search for gidNumber=%lu gave duplicate results, failing to map to a SID!\n",
285 : (unsigned long)unixid->id));
286 0 : status = NT_STATUS_NONE_MAPPED;
287 0 : goto failed;
288 73 : } else if (ret == LDB_SUCCESS) {
289 0 : *sid = samdb_result_dom_sid(mem_ctx, msg, "objectSid");
290 0 : if (*sid == NULL) {
291 0 : DEBUG(1, ("Search for gidNumber=%lu did not return an objectSid!\n",
292 : (unsigned long)unixid->id));
293 0 : status = NT_STATUS_NONE_MAPPED;
294 0 : goto failed;
295 : }
296 0 : talloc_free(tmp_ctx);
297 0 : return NT_STATUS_OK;
298 73 : } else if (ret != LDB_ERR_NO_SUCH_OBJECT) {
299 0 : DEBUG(1, ("Search for gidNumber=%lu gave '%s', failing to map to a SID!\n",
300 : (unsigned long)unixid->id, ldb_errstring(idmap_ctx->samdb)));
301 0 : status = NT_STATUS_NONE_MAPPED;
302 0 : goto failed;
303 : }
304 :
305 69 : id_type = "ID_TYPE_GID";
306 69 : break;
307 0 : default:
308 0 : DEBUG(1, ("unixid->type must be type gid or uid (got %u) for lookup with id %lu\n",
309 : (unsigned)unixid->type, (unsigned long)unixid->id));
310 0 : status = NT_STATUS_NONE_MAPPED;
311 0 : goto failed;
312 : }
313 :
314 154 : ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
315 : NULL, "(&(|(type=ID_TYPE_BOTH)(type=%s))"
316 : "(xidNumber=%u))", id_type, unixid->id);
317 154 : if (ret != LDB_SUCCESS) {
318 0 : DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
319 0 : status = NT_STATUS_NONE_MAPPED;
320 0 : goto failed;
321 : }
322 :
323 154 : if (res->count == 1) {
324 76 : const char *type = ldb_msg_find_attr_as_string(res->msgs[0],
325 : "type", NULL);
326 :
327 76 : *sid = idmap_msg_get_dom_sid(mem_ctx, res->msgs[0],
328 : "objectSid");
329 76 : if (*sid == NULL) {
330 0 : DEBUG(1, ("Failed to get sid from db: %u\n", ret));
331 0 : status = NT_STATUS_NONE_MAPPED;
332 0 : goto failed;
333 : }
334 :
335 76 : if (type == NULL) {
336 0 : DEBUG(1, ("Invalid type for mapping entry.\n"));
337 0 : talloc_free(tmp_ctx);
338 0 : return NT_STATUS_NONE_MAPPED;
339 : }
340 :
341 76 : if (strcmp(type, "ID_TYPE_BOTH") == 0) {
342 0 : unixid->type = ID_TYPE_BOTH;
343 76 : } else if (strcmp(type, "ID_TYPE_UID") == 0) {
344 76 : unixid->type = ID_TYPE_UID;
345 : } else {
346 0 : unixid->type = ID_TYPE_GID;
347 : }
348 :
349 76 : talloc_free(tmp_ctx);
350 76 : return NT_STATUS_OK;
351 : }
352 :
353 78 : DEBUG(6, ("xid not found in idmap db, create S-1-22- SID.\n"));
354 :
355 : /* For local users/groups , we just create a rid = uid/gid */
356 78 : if (unixid->type == ID_TYPE_UID) {
357 3 : unix_sid = &global_sid_Unix_Users;
358 : } else {
359 73 : unix_sid = &global_sid_Unix_Groups;
360 : }
361 :
362 78 : new_sid = dom_sid_add_rid(mem_ctx, unix_sid, unixid->id);
363 78 : if (new_sid == NULL) {
364 0 : status = NT_STATUS_NO_MEMORY;
365 0 : goto failed;
366 : }
367 :
368 78 : *sid = new_sid;
369 78 : talloc_free(tmp_ctx);
370 78 : return NT_STATUS_OK;
371 :
372 0 : failed:
373 0 : talloc_free(tmp_ctx);
374 0 : return status;
375 : }
376 :
377 :
378 : /**
379 : * Map a SID to an unixid struct.
380 : *
381 : * If no mapping exists, a new mapping will be created.
382 : *
383 : * \param idmap_ctx idmap context to use
384 : * \param mem_ctx talloc context to use
385 : * \param sid SID to map to an unixid struct
386 : * \param unixid pointer to a unixid struct
387 : * \return NT_STATUS_OK on success, NT_STATUS_INVALID_SID if the sid is not from
388 : * a trusted domain and idmap trusted only = true, NT_STATUS_NONE_MAPPED if the
389 : * mapping failed.
390 : */
391 44006 : static NTSTATUS idmap_sid_to_xid(struct idmap_context *idmap_ctx,
392 : TALLOC_CTX *mem_ctx,
393 : const struct dom_sid *sid,
394 : struct unixid *unixid)
395 : {
396 2298 : int ret;
397 2298 : NTSTATUS status;
398 44006 : struct ldb_context *ldb = idmap_ctx->ldb_ctx;
399 2298 : struct ldb_dn *dn;
400 2298 : struct ldb_message *hwm_msg, *map_msg, *sam_msg;
401 44006 : struct ldb_result *res = NULL;
402 44006 : int trans = -1;
403 2298 : uint32_t low, high, hwm, new_xid;
404 2298 : struct dom_sid_buf sid_string;
405 2298 : char *unixid_string, *hwm_string;
406 2298 : bool hwm_entry_exists;
407 44006 : TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
408 44006 : const char *sam_attrs[] = {"uidNumber", "gidNumber", "samAccountType", NULL};
409 :
410 44006 : if (sid_check_is_in_unix_users(sid)) {
411 0 : uint32_t rid;
412 0 : DEBUG(6, ("This is a local unix uid, just calculate that.\n"));
413 0 : status = dom_sid_split_rid(tmp_ctx, sid, NULL, &rid);
414 0 : if (!NT_STATUS_IS_OK(status)) {
415 0 : talloc_free(tmp_ctx);
416 0 : return status;
417 : }
418 :
419 0 : unixid->id = rid;
420 0 : unixid->type = ID_TYPE_UID;
421 :
422 0 : talloc_free(tmp_ctx);
423 0 : return NT_STATUS_OK;
424 : }
425 :
426 44006 : if (sid_check_is_in_unix_groups(sid)) {
427 0 : uint32_t rid;
428 0 : DEBUG(6, ("This is a local unix gid, just calculate that.\n"));
429 0 : status = dom_sid_split_rid(tmp_ctx, sid, NULL, &rid);
430 0 : if (!NT_STATUS_IS_OK(status)) {
431 0 : talloc_free(tmp_ctx);
432 0 : return status;
433 : }
434 :
435 0 : unixid->id = rid;
436 0 : unixid->type = ID_TYPE_GID;
437 :
438 0 : talloc_free(tmp_ctx);
439 0 : return NT_STATUS_OK;
440 : }
441 :
442 : /*
443 : * First check against our local DB, to see if this user has a
444 : * mapping there. This means that the Samba4 AD DC behaves
445 : * much like a winbindd member server running idmap_ad
446 : */
447 :
448 44006 : if (lpcfg_parm_bool(idmap_ctx->lp_ctx, NULL, "idmap_ldb", "use rfc2307", false)) {
449 918 : struct dom_sid_buf buf;
450 34546 : ret = dsdb_search_one(idmap_ctx->samdb, tmp_ctx, &sam_msg,
451 : ldb_get_default_basedn(idmap_ctx->samdb),
452 : LDB_SCOPE_SUBTREE, sam_attrs, 0,
453 : "(&(objectSid=%s)"
454 : "(|(sAMaccountType=%u)(sAMaccountType=%u)(sAMaccountType=%u)"
455 : "(sAMaccountType=%u)(sAMaccountType=%u))"
456 : "(|(uidNumber=*)(gidNumber=*)))",
457 : dom_sid_str_buf(sid, &buf),
458 : ATYPE_ACCOUNT, ATYPE_WORKSTATION_TRUST, ATYPE_INTERDOMAIN_TRUST,
459 : ATYPE_SECURITY_GLOBAL_GROUP, ATYPE_SECURITY_LOCAL_GROUP);
460 : } else {
461 : /* If we are not to use the rfc2307 attributes, we just emulate a non-match */
462 8080 : ret = LDB_ERR_NO_SUCH_OBJECT;
463 : }
464 :
465 42626 : if (ret == LDB_ERR_CONSTRAINT_VIOLATION) {
466 0 : struct dom_sid_buf buf;
467 0 : DEBUG(1, ("Search for objectSid=%s gave duplicate results, failing to map to a unix ID!\n",
468 : dom_sid_str_buf(sid, &buf)));
469 0 : status = NT_STATUS_NONE_MAPPED;
470 0 : goto failed;
471 44006 : } else if (ret == LDB_SUCCESS) {
472 0 : uint32_t account_type = ldb_msg_find_attr_as_uint(sam_msg, "sAMaccountType", 0);
473 0 : if ((account_type == ATYPE_ACCOUNT) ||
474 0 : (account_type == ATYPE_WORKSTATION_TRUST ) ||
475 : (account_type == ATYPE_INTERDOMAIN_TRUST ))
476 0 : {
477 0 : const struct ldb_val *v = ldb_msg_find_ldb_val(sam_msg, "uidNumber");
478 0 : if (v) {
479 0 : unixid->type = ID_TYPE_UID;
480 0 : unixid->id = ldb_msg_find_attr_as_uint(sam_msg, "uidNumber", -1);
481 0 : talloc_free(tmp_ctx);
482 0 : return NT_STATUS_OK;
483 : }
484 :
485 0 : } else if ((account_type == ATYPE_SECURITY_GLOBAL_GROUP) ||
486 0 : (account_type == ATYPE_SECURITY_LOCAL_GROUP))
487 : {
488 0 : const struct ldb_val *v = ldb_msg_find_ldb_val(sam_msg, "gidNumber");
489 0 : if (v) {
490 0 : unixid->type = ID_TYPE_GID;
491 0 : unixid->id = ldb_msg_find_attr_as_uint(sam_msg, "gidNumber", -1);
492 0 : talloc_free(tmp_ctx);
493 0 : return NT_STATUS_OK;
494 : }
495 : }
496 44006 : } else if (ret != LDB_ERR_NO_SUCH_OBJECT) {
497 0 : struct dom_sid_buf buf;
498 0 : DEBUG(1, ("Search for objectSid=%s gave '%s', failing to map to a SID!\n",
499 : dom_sid_str_buf(sid, &buf),
500 : ldb_errstring(idmap_ctx->samdb)));
501 :
502 0 : status = NT_STATUS_NONE_MAPPED;
503 0 : goto failed;
504 : }
505 :
506 44006 : ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
507 : NULL, "(&(objectClass=sidMap)(objectSid=%s))",
508 : ldap_encode_ndr_dom_sid(tmp_ctx, sid));
509 44006 : if (ret != LDB_SUCCESS) {
510 0 : DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
511 0 : talloc_free(tmp_ctx);
512 0 : return NT_STATUS_NONE_MAPPED;
513 : }
514 :
515 44006 : if (res->count == 1) {
516 43286 : const char *type = ldb_msg_find_attr_as_string(res->msgs[0],
517 : "type", NULL);
518 43286 : new_xid = ldb_msg_find_attr_as_uint(res->msgs[0], "xidNumber",
519 : -1);
520 43286 : if (new_xid == (uint32_t) -1) {
521 0 : DEBUG(1, ("Invalid xid mapping.\n"));
522 0 : talloc_free(tmp_ctx);
523 0 : return NT_STATUS_NONE_MAPPED;
524 : }
525 :
526 43286 : if (type == NULL) {
527 0 : DEBUG(1, ("Invalid type for mapping entry.\n"));
528 0 : talloc_free(tmp_ctx);
529 0 : return NT_STATUS_NONE_MAPPED;
530 : }
531 :
532 43286 : unixid->id = new_xid;
533 :
534 43286 : if (strcmp(type, "ID_TYPE_BOTH") == 0) {
535 37651 : unixid->type = ID_TYPE_BOTH;
536 5635 : } else if (strcmp(type, "ID_TYPE_UID") == 0) {
537 962 : unixid->type = ID_TYPE_UID;
538 : } else {
539 4673 : unixid->type = ID_TYPE_GID;
540 : }
541 :
542 43286 : talloc_free(tmp_ctx);
543 43286 : return NT_STATUS_OK;
544 : }
545 :
546 720 : DEBUG(6, ("No existing mapping found, attempting to create one.\n"));
547 :
548 720 : trans = ldb_transaction_start(ldb);
549 720 : if (trans != LDB_SUCCESS) {
550 0 : status = NT_STATUS_NONE_MAPPED;
551 0 : goto failed;
552 : }
553 :
554 : /* Redo the search to make sure no one changed the mapping while we
555 : * weren't looking */
556 720 : ret = ldb_search(ldb, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
557 : NULL, "(&(objectClass=sidMap)(objectSid=%s))",
558 : ldap_encode_ndr_dom_sid(tmp_ctx, sid));
559 720 : if (ret != LDB_SUCCESS) {
560 0 : DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
561 0 : status = NT_STATUS_NONE_MAPPED;
562 0 : goto failed;
563 : }
564 :
565 720 : if (res->count > 0) {
566 0 : DEBUG(1, ("Database changed while trying to add a sidmap.\n"));
567 0 : status = NT_STATUS_RETRY;
568 0 : goto failed;
569 : }
570 :
571 720 : ret = idmap_get_bounds(idmap_ctx, &low, &high);
572 720 : if (ret != LDB_SUCCESS) {
573 0 : status = NT_STATUS_NONE_MAPPED;
574 0 : goto failed;
575 : }
576 :
577 720 : dn = ldb_dn_new(tmp_ctx, ldb, "CN=CONFIG");
578 720 : if (dn == NULL) {
579 0 : status = NT_STATUS_NO_MEMORY;
580 0 : goto failed;
581 : }
582 :
583 720 : ret = ldb_search(ldb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, NULL, NULL);
584 720 : if (ret != LDB_SUCCESS) {
585 0 : DEBUG(1, ("Search failed: %s\n", ldb_errstring(ldb)));
586 0 : status = NT_STATUS_NONE_MAPPED;
587 0 : goto failed;
588 : }
589 :
590 720 : if (res->count != 1) {
591 0 : DEBUG(1, ("No CN=CONFIG record, idmap database is broken.\n"));
592 0 : status = NT_STATUS_NONE_MAPPED;
593 0 : goto failed;
594 : }
595 :
596 720 : hwm = ldb_msg_find_attr_as_uint(res->msgs[0], "xidNumber", -1);
597 720 : if (hwm == (uint32_t)-1) {
598 81 : hwm = low;
599 81 : hwm_entry_exists = false;
600 : } else {
601 594 : hwm_entry_exists = true;
602 : }
603 :
604 720 : if (hwm > high) {
605 0 : DEBUG(1, ("Out of xids to allocate.\n"));
606 0 : status = NT_STATUS_NONE_MAPPED;
607 0 : goto failed;
608 : }
609 :
610 720 : hwm_msg = ldb_msg_new(tmp_ctx);
611 720 : if (hwm_msg == NULL) {
612 0 : DEBUG(1, ("Out of memory when creating ldb_message\n"));
613 0 : status = NT_STATUS_NO_MEMORY;
614 0 : goto failed;
615 : }
616 :
617 720 : hwm_msg->dn = dn;
618 :
619 720 : new_xid = hwm;
620 720 : hwm++;
621 :
622 720 : hwm_string = talloc_asprintf(tmp_ctx, "%u", hwm);
623 720 : if (hwm_string == NULL) {
624 0 : status = NT_STATUS_NO_MEMORY;
625 0 : goto failed;
626 : }
627 :
628 720 : dom_sid_str_buf(sid, &sid_string);
629 :
630 720 : unixid_string = talloc_asprintf(tmp_ctx, "%u", new_xid);
631 720 : if (unixid_string == NULL) {
632 0 : status = NT_STATUS_NO_MEMORY;
633 0 : goto failed;
634 : }
635 :
636 720 : if (hwm_entry_exists) {
637 45 : struct ldb_message_element *els;
638 45 : struct ldb_val *vals;
639 :
640 : /* We're modifying the entry, not just adding a new one. */
641 639 : els = talloc_array(tmp_ctx, struct ldb_message_element, 2);
642 639 : if (els == NULL) {
643 0 : status = NT_STATUS_NO_MEMORY;
644 0 : goto failed;
645 : }
646 :
647 639 : vals = talloc_array(tmp_ctx, struct ldb_val, 2);
648 639 : if (vals == NULL) {
649 0 : status = NT_STATUS_NO_MEMORY;
650 0 : goto failed;
651 : }
652 :
653 639 : hwm_msg->num_elements = 2;
654 639 : hwm_msg->elements = els;
655 :
656 639 : els[0].num_values = 1;
657 639 : els[0].values = &vals[0];
658 639 : els[0].flags = LDB_FLAG_MOD_DELETE;
659 639 : els[0].name = talloc_strdup(tmp_ctx, "xidNumber");
660 639 : if (els[0].name == NULL) {
661 0 : status = NT_STATUS_NO_MEMORY;
662 0 : goto failed;
663 : }
664 :
665 639 : els[1].num_values = 1;
666 639 : els[1].values = &vals[1];
667 639 : els[1].flags = LDB_FLAG_MOD_ADD;
668 639 : els[1].name = els[0].name;
669 :
670 639 : vals[0].data = (uint8_t *)unixid_string;
671 639 : vals[0].length = strlen(unixid_string);
672 639 : vals[1].data = (uint8_t *)hwm_string;
673 639 : vals[1].length = strlen(hwm_string);
674 : } else {
675 81 : ret = ldb_msg_append_string(hwm_msg, "xidNumber", hwm_string,
676 : LDB_FLAG_MOD_ADD);
677 81 : if (ret != LDB_SUCCESS)
678 : {
679 0 : status = NT_STATUS_NONE_MAPPED;
680 0 : goto failed;
681 : }
682 : }
683 :
684 720 : ret = ldb_modify(ldb, hwm_msg);
685 720 : if (ret != LDB_SUCCESS) {
686 0 : DEBUG(1, ("Updating the xid high water mark failed: %s\n",
687 : ldb_errstring(ldb)));
688 0 : status = NT_STATUS_NONE_MAPPED;
689 0 : goto failed;
690 : }
691 :
692 720 : map_msg = ldb_msg_new(tmp_ctx);
693 720 : if (map_msg == NULL) {
694 0 : status = NT_STATUS_NO_MEMORY;
695 0 : goto failed;
696 : }
697 :
698 720 : map_msg->dn = ldb_dn_new_fmt(tmp_ctx, ldb, "CN=%s", sid_string.buf);
699 720 : if (map_msg->dn == NULL) {
700 0 : status = NT_STATUS_NO_MEMORY;
701 0 : goto failed;
702 : }
703 :
704 720 : ret = ldb_msg_add_string(map_msg, "xidNumber", unixid_string);
705 720 : if (ret != LDB_SUCCESS) {
706 0 : status = NT_STATUS_NONE_MAPPED;
707 0 : goto failed;
708 : }
709 :
710 720 : ret = idmap_msg_add_dom_sid(idmap_ctx, tmp_ctx, map_msg, "objectSid",
711 : sid);
712 720 : if (ret != LDB_SUCCESS) {
713 0 : status = NT_STATUS_NONE_MAPPED;
714 0 : goto failed;
715 : }
716 :
717 720 : ret = ldb_msg_add_string(map_msg, "objectClass", "sidMap");
718 720 : if (ret != LDB_SUCCESS) {
719 0 : status = NT_STATUS_NONE_MAPPED;
720 0 : goto failed;
721 : }
722 :
723 720 : ret = ldb_msg_add_string(map_msg, "type", "ID_TYPE_BOTH");
724 720 : if (ret != LDB_SUCCESS) {
725 0 : status = NT_STATUS_NONE_MAPPED;
726 0 : goto failed;
727 : }
728 :
729 720 : ret = ldb_msg_add_string(map_msg, "cn", sid_string.buf);
730 720 : if (ret != LDB_SUCCESS) {
731 0 : status = NT_STATUS_NONE_MAPPED;
732 0 : goto failed;
733 : }
734 :
735 720 : ret = ldb_add(ldb, map_msg);
736 720 : if (ret != LDB_SUCCESS) {
737 0 : DEBUG(1, ("Adding a sidmap failed: %s\n", ldb_errstring(ldb)));
738 0 : status = NT_STATUS_NONE_MAPPED;
739 0 : goto failed;
740 : }
741 :
742 720 : trans = ldb_transaction_commit(ldb);
743 720 : if (trans != LDB_SUCCESS) {
744 0 : DEBUG(1, ("Transaction failed: %s\n", ldb_errstring(ldb)));
745 0 : status = NT_STATUS_NONE_MAPPED;
746 0 : goto failed;
747 : }
748 :
749 720 : unixid->id = new_xid;
750 720 : unixid->type = ID_TYPE_BOTH;
751 720 : talloc_free(tmp_ctx);
752 720 : return NT_STATUS_OK;
753 :
754 0 : failed:
755 0 : if (trans == LDB_SUCCESS) ldb_transaction_cancel(ldb);
756 0 : talloc_free(tmp_ctx);
757 0 : return status;
758 : }
759 :
760 : /**
761 : * Convert an array of unixids to the corresponding array of SIDs
762 : *
763 : * \param idmap_ctx idmap context to use
764 : * \param mem_ctx talloc context the memory for the dom_sids is allocated
765 : * from.
766 : * \param count length of id_mapping array.
767 : * \param id array of id_mappings.
768 : * \return NT_STATUS_OK on success, NT_STATUS_NONE_MAPPED if mapping is not
769 : * possible at all, NT_STATUS_SOME_UNMAPPED if some mappings worked and some
770 : * did not.
771 : */
772 :
773 154 : NTSTATUS idmap_xids_to_sids(struct idmap_context *idmap_ctx,
774 : TALLOC_CTX *mem_ctx,
775 : struct id_map **id)
776 : {
777 154 : unsigned int i, error_count = 0;
778 8 : NTSTATUS status;
779 :
780 308 : for (i = 0; id && id[i]; i++) {
781 154 : status = idmap_xid_to_sid(idmap_ctx, mem_ctx,
782 146 : &id[i]->xid, &id[i]->sid);
783 154 : if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
784 0 : status = idmap_xid_to_sid(idmap_ctx, mem_ctx,
785 0 : &id[i]->xid,
786 0 : &id[i]->sid);
787 : }
788 154 : if (!NT_STATUS_IS_OK(status)) {
789 0 : DEBUG(1, ("idmapping xid_to_sid failed for id[%d]=%lu: %s\n",
790 : i, (unsigned long)id[i]->xid.id, nt_errstr(status)));
791 0 : error_count++;
792 0 : id[i]->status = ID_UNMAPPED;
793 : } else {
794 154 : id[i]->status = ID_MAPPED;
795 : }
796 : }
797 :
798 154 : if (error_count == i) {
799 : /* Mapping did not work at all. */
800 0 : return NT_STATUS_NONE_MAPPED;
801 154 : } else if (error_count > 0) {
802 : /* Some mappings worked, some did not. */
803 0 : return STATUS_SOME_UNMAPPED;
804 : } else {
805 154 : return NT_STATUS_OK;
806 : }
807 : }
808 :
809 : /**
810 : * Convert an array of SIDs to the corresponding array of unixids
811 : *
812 : * \param idmap_ctx idmap context to use
813 : * \param mem_ctx talloc context the memory for the unixids is allocated
814 : * from.
815 : * \param count length of id_mapping array.
816 : * \param id array of id_mappings.
817 : * \return NT_STATUS_OK on success, NT_STATUS_NONE_MAPPED if mapping is not
818 : * possible at all, NT_STATUS_SOME_UNMAPPED if some mappings worked and some
819 : * did not.
820 : */
821 :
822 44006 : NTSTATUS idmap_sids_to_xids(struct idmap_context *idmap_ctx,
823 : TALLOC_CTX *mem_ctx,
824 : struct id_map **id)
825 : {
826 44006 : unsigned int i, error_count = 0;
827 2298 : NTSTATUS status;
828 :
829 88012 : for (i = 0; id && id[i]; i++) {
830 46304 : status = idmap_sid_to_xid(idmap_ctx, mem_ctx,
831 44006 : id[i]->sid, &id[i]->xid);
832 44006 : if (NT_STATUS_EQUAL(status, NT_STATUS_RETRY)) {
833 0 : status = idmap_sid_to_xid(idmap_ctx, mem_ctx,
834 0 : id[i]->sid,
835 0 : &id[i]->xid);
836 : }
837 44006 : if (!NT_STATUS_IS_OK(status)) {
838 0 : struct dom_sid_buf buf;
839 0 : DEBUG(1, ("idmapping sid_to_xid failed for id[%d]=%s: %s\n",
840 : i,
841 : dom_sid_str_buf(id[i]->sid, &buf),
842 : nt_errstr(status)));
843 0 : error_count++;
844 0 : id[i]->status = ID_UNMAPPED;
845 : } else {
846 44006 : id[i]->status = ID_MAPPED;
847 : }
848 : }
849 :
850 44006 : if (error_count == i) {
851 : /* Mapping did not work at all. */
852 0 : return NT_STATUS_NONE_MAPPED;
853 44006 : } else if (error_count > 0) {
854 : /* Some mappings worked, some did not. */
855 0 : return STATUS_SOME_UNMAPPED;
856 : } else {
857 44006 : return NT_STATUS_OK;
858 : }
859 : }
860 :
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