2 Unix SMB/CIFS implementation.
4 common functions for TDB based idmapping backends
6 Copyright (C) Christian Ambach 2012
8 These functions were initially copied over from idmap_tdb.c and idmap_tdb2.c
11 Copyright (C) Tim Potter 2000
12 Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2003
13 Copyright (C) Jeremy Allison 2006
14 Copyright (C) Simo Sorce 2003-2006
15 Copyright (C) Michael Adam 2009-2010
16 Copyright (C) Andrew Tridgell 2007
18 This program is free software; you can redistribute it and/or modify
19 it under the terms of the GNU General Public License as published by
20 the Free Software Foundation; either version 2 of the License, or
21 (at your option) any later version.
23 This program is distributed in the hope that it will be useful,
24 but WITHOUT ANY WARRANTY; without even the implied warranty of
25 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 GNU General Public License for more details.
28 You should have received a copy of the GNU General Public License
29 along with this program; if not, write to the Free Software
30 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
34 #include "idmap_tdb_common.h"
35 #include "dbwrap/dbwrap.h"
38 #include "../libcli/security/dom_sid.h"
41 #define DBGC_CLASS DBGC_IDMAP
43 struct idmap_tdb_common_allocate_id_context {
50 static NTSTATUS idmap_tdb_common_allocate_id_action(struct db_context *db,
54 struct idmap_tdb_common_allocate_id_context *state = private_data;
57 ret = dbwrap_fetch_uint32_bystring(db, state->hwmkey, &hwm);
58 if (!NT_STATUS_IS_OK(ret)) {
59 ret = NT_STATUS_INTERNAL_DB_ERROR;
63 /* check it is in the range */
64 if (hwm > state->high_hwm) {
65 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
66 state->hwmtype, (unsigned long)state->high_hwm));
67 ret = NT_STATUS_UNSUCCESSFUL;
71 /* fetch a new id and increment it */
72 ret = dbwrap_change_uint32_atomic_bystring(db, state->hwmkey, &hwm, 1);
73 if (!NT_STATUS_IS_OK(ret)) {
74 DEBUG(1, ("Fatal error while fetching a new %s value\n!",
79 /* recheck it is in the range */
80 if (hwm > state->high_hwm) {
81 DEBUG(1, ("Fatal Error: %s range full!! (max: %lu)\n",
82 state->hwmtype, (unsigned long)state->high_hwm));
83 ret = NT_STATUS_UNSUCCESSFUL;
94 static NTSTATUS idmap_tdb_common_allocate_id(struct idmap_domain *dom,
101 struct idmap_tdb_common_allocate_id_context state;
102 struct idmap_tdb_common_context *ctx;
105 talloc_get_type_abort(dom->private_data,
106 struct idmap_tdb_common_context);
108 /* Get current high water mark */
112 hwmkey = ctx->hwmkey_uid;
117 hwmkey = ctx->hwmkey_gid;
122 DEBUG(2, ("Invalid ID type (0x%x)\n", xid->type));
123 return NT_STATUS_INVALID_PARAMETER;
127 state.high_hwm = ctx->max_id;
128 state.hwmtype = hwmtype;
129 state.hwmkey = hwmkey;
131 status = dbwrap_trans_do(ctx->db, idmap_tdb_common_allocate_id_action,
134 if (NT_STATUS_IS_OK(status)) {
136 DEBUG(10, ("New %s = %d\n", hwmtype, state.hwm));
138 DEBUG(1, ("Error allocating a new %s\n", hwmtype));
145 * Allocate a new unix-ID.
146 * For now this is for the default idmap domain only.
147 * Should be extended later on.
149 NTSTATUS idmap_tdb_common_get_new_id(struct idmap_domain * dom,
154 if (!strequal(dom->name, "*")) {
155 DEBUG(3, ("idmap_tdb_common_get_new_id: "
156 "Refusing allocation of a new unixid for domain'%s'. "
157 "Currently only supported for the default "
158 "domain \"*\".\n", dom->name));
159 return NT_STATUS_NOT_IMPLEMENTED;
162 ret = idmap_tdb_common_allocate_id(dom, id);
168 * store a mapping in the database.
171 struct idmap_tdb_common_set_mapping_context {
176 static NTSTATUS idmap_tdb_common_set_mapping_action(struct db_context *db,
181 struct idmap_tdb_common_set_mapping_context *state = private_data;
182 TALLOC_CTX *tmp_ctx = talloc_stackframe();
184 DEBUG(10, ("Storing %s <-> %s map\n", state->ksidstr, state->kidstr));
186 /* check whether sid mapping is already present in db */
187 ret = dbwrap_fetch_bystring(db, tmp_ctx, state->ksidstr, &data);
188 if (NT_STATUS_IS_OK(ret)) {
189 ret = NT_STATUS_OBJECT_NAME_COLLISION;
193 ret = dbwrap_store_bystring(db, state->ksidstr,
194 string_term_tdb_data(state->kidstr),
196 if (!NT_STATUS_IS_OK(ret)) {
197 DEBUG(0, ("Error storing SID -> ID: %s\n", nt_errstr(ret)));
201 ret = dbwrap_store_bystring(db, state->kidstr,
202 string_term_tdb_data(state->ksidstr),
204 if (!NT_STATUS_IS_OK(ret)) {
205 DEBUG(0, ("Error storing ID -> SID: %s\n", nt_errstr(ret)));
206 /* try to remove the previous stored SID -> ID map */
207 dbwrap_delete_bystring(db, state->ksidstr);
211 DEBUG(10, ("Stored %s <-> %s\n", state->ksidstr, state->kidstr));
214 talloc_free(tmp_ctx);
218 NTSTATUS idmap_tdb_common_set_mapping(struct idmap_domain * dom,
219 const struct id_map * map)
221 struct idmap_tdb_common_context *ctx;
222 struct idmap_tdb_common_set_mapping_context state;
224 char *ksidstr = NULL;
227 if (!map || !map->sid) {
228 return NT_STATUS_INVALID_PARAMETER;
231 /* TODO: should we filter a set_mapping using low/high filters ? */
234 talloc_get_type_abort(dom->private_data,
235 struct idmap_tdb_common_context);
237 switch (map->xid.type) {
241 talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
246 talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
250 DEBUG(2, ("INVALID unix ID type: 0x%02x\n", map->xid.type));
251 return NT_STATUS_INVALID_PARAMETER;
254 if (kidstr == NULL) {
255 DEBUG(0, ("ERROR: Out of memory!\n"));
256 ret = NT_STATUS_NO_MEMORY;
260 ksidstr = sid_string_talloc(ctx, map->sid);
261 if (ksidstr == NULL) {
262 DEBUG(0, ("Out of memory!\n"));
263 ret = NT_STATUS_NO_MEMORY;
267 state.ksidstr = ksidstr;
268 state.kidstr = kidstr;
270 ret = dbwrap_trans_do(ctx->db, idmap_tdb_common_set_mapping_action,
274 talloc_free(ksidstr);
280 * Create a new mapping for an unmapped SID, also allocating a new ID.
281 * This should be run inside a transaction.
284 * Properly integrate this with multi domain idmap config:
285 * Currently, the allocator is default-config only.
287 NTSTATUS idmap_tdb_common_new_mapping(struct idmap_domain * dom,
291 struct idmap_tdb_common_context *ctx;
294 talloc_get_type_abort(dom->private_data,
295 struct idmap_tdb_common_context);
297 ret = idmap_rw_new_mapping(dom, ctx->rw_ops, map);
303 lookup a set of unix ids
305 NTSTATUS idmap_tdb_common_unixids_to_sids(struct idmap_domain * dom,
306 struct id_map ** ids)
309 size_t i, num_mapped = 0;
310 struct idmap_tdb_common_context *ctx;
312 NTSTATUS(*unixid_to_sid_fn) (struct idmap_domain * dom,
313 struct id_map * map);
315 talloc_get_type_abort(dom->private_data,
316 struct idmap_tdb_common_context);
318 if (ctx->unixid_to_sid_fn == NULL) {
319 unixid_to_sid_fn = idmap_tdb_common_unixid_to_sid;
321 unixid_to_sid_fn = ctx->unixid_to_sid_fn;
324 /* initialize the status to avoid surprise */
325 for (i = 0; ids[i]; i++) {
326 ids[i]->status = ID_UNKNOWN;
329 for (i = 0; ids[i]; i++) {
330 ret = unixid_to_sid_fn(dom, ids[i]);
331 if (!NT_STATUS_IS_OK(ret)) {
333 /* if it is just a failed mapping continue */
334 if (NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) {
336 /* make sure it is marked as unmapped */
337 ids[i]->status = ID_UNMAPPED;
341 /* some fatal error occurred, return immediately */
345 /* all ok, id is mapped */
346 ids[i]->status = ID_MAPPED;
354 if (NT_STATUS_IS_OK(ret)) {
355 if (i == 0 || num_mapped == 0) {
356 ret = NT_STATUS_NONE_MAPPED;
357 } else if (num_mapped < i) {
358 ret = STATUS_SOME_UNMAPPED;
368 default single id to sid lookup function
370 NTSTATUS idmap_tdb_common_unixid_to_sid(struct idmap_domain * dom,
376 struct idmap_tdb_common_context *ctx;
379 return NT_STATUS_INVALID_PARAMETER;
383 talloc_get_type_abort(dom->private_data,
384 struct idmap_tdb_common_context);
386 /* apply filters before checking */
387 if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
389 ("Requested id (%u) out of range (%u - %u). Filtered!\n",
390 map->xid.id, dom->low_id, dom->high_id));
391 return NT_STATUS_NONE_MAPPED;
394 switch (map->xid.type) {
398 talloc_asprintf(ctx, "UID %lu", (unsigned long)map->xid.id);
403 talloc_asprintf(ctx, "GID %lu", (unsigned long)map->xid.id);
407 DEBUG(2, ("INVALID unix ID type: 0x%02x\n", map->xid.type));
408 return NT_STATUS_INVALID_PARAMETER;
411 if (keystr == NULL) {
412 DEBUG(0, ("Out of memory!\n"));
413 ret = NT_STATUS_NO_MEMORY;
417 DEBUG(10, ("Fetching record %s\n", keystr));
419 /* Check if the mapping exists */
420 ret = dbwrap_fetch_bystring(ctx->db, keystr, keystr, &data);
422 if (!NT_STATUS_IS_OK(ret)) {
423 DEBUG(10, ("Record %s not found\n", keystr));
424 ret = NT_STATUS_NONE_MAPPED;
428 if ((data.dsize == 0) || (data.dptr[data.dsize-1] != '\0')) {
429 DBG_DEBUG("Invalid record length %zu\n", data.dsize);
430 ret = NT_STATUS_INTERNAL_DB_ERROR;
434 if (!string_to_sid(map->sid, (const char *)data.dptr)) {
435 DEBUG(10, ("INVALID SID (%s) in record %s\n",
436 (const char *)data.dptr, keystr));
437 ret = NT_STATUS_INTERNAL_DB_ERROR;
441 DEBUG(10, ("Found record %s -> %s\n", keystr, (const char *)data.dptr));
449 /**********************************
450 Single sid to id lookup function.
451 **********************************/
453 NTSTATUS idmap_tdb_common_sid_to_unixid(struct idmap_domain * dom,
459 unsigned long rec_id = 0;
460 struct idmap_tdb_common_context *ctx;
461 TALLOC_CTX *tmp_ctx = talloc_stackframe();
464 talloc_free(tmp_ctx);
465 return NT_STATUS_INVALID_PARAMETER;
469 talloc_get_type_abort(dom->private_data,
470 struct idmap_tdb_common_context);
472 keystr = sid_string_talloc(tmp_ctx, map->sid);
473 if (keystr == NULL) {
474 DEBUG(0, ("Out of memory!\n"));
475 ret = NT_STATUS_NO_MEMORY;
479 DEBUG(10, ("Fetching record %s\n", keystr));
481 /* Check if sid is present in database */
482 ret = dbwrap_fetch_bystring(ctx->db, tmp_ctx, keystr, &data);
483 if (!NT_STATUS_IS_OK(ret)) {
484 DEBUG(10, ("Record %s not found\n", keystr));
485 ret = NT_STATUS_NONE_MAPPED;
489 /* What type of record is this ? */
490 if (sscanf((const char *)data.dptr, "UID %lu", &rec_id) == 1) {
491 /* Try a UID record. */
492 map->xid.id = rec_id;
493 map->xid.type = ID_TYPE_UID;
495 ("Found uid record %s -> %s \n", keystr,
496 (const char *)data.dptr));
499 } else if (sscanf((const char *)data.dptr, "GID %lu", &rec_id) == 1) {
500 /* Try a GID record. */
501 map->xid.id = rec_id;
502 map->xid.type = ID_TYPE_GID;
504 ("Found gid record %s -> %s \n", keystr,
505 (const char *)data.dptr));
508 } else { /* Unknown record type ! */
510 ("Found INVALID record %s -> %s\n", keystr,
511 (const char *)data.dptr));
512 ret = NT_STATUS_INTERNAL_DB_ERROR;
516 /* apply filters before returning result */
517 if (!idmap_unix_id_is_in_range(map->xid.id, dom)) {
519 ("Requested id (%u) out of range (%u - %u). Filtered!\n",
520 map->xid.id, dom->low_id, dom->high_id));
521 ret = NT_STATUS_NONE_MAPPED;
525 talloc_free(tmp_ctx);
529 /**********************************
531 **********************************/
533 struct idmap_tdb_common_sids_to_unixids_context {
534 struct idmap_domain *dom;
536 bool allocate_unmapped;
537 NTSTATUS(*sid_to_unixid_fn) (struct idmap_domain * dom,
538 struct id_map * map);
541 static NTSTATUS idmap_tdb_common_sids_to_unixids_action(struct db_context *db,
544 struct idmap_tdb_common_sids_to_unixids_context *state = private_data;
545 size_t i, num_mapped = 0;
546 NTSTATUS ret = NT_STATUS_OK;
548 DEBUG(10, ("idmap_tdb_common_sids_to_unixids: "
549 " domain: [%s], allocate: %s\n",
550 state->dom->name, state->allocate_unmapped ? "yes" : "no"));
552 for (i = 0; state->ids[i]; i++) {
553 if ((state->ids[i]->status == ID_UNKNOWN) ||
554 /* retry if we could not map in previous run: */
555 (state->ids[i]->status == ID_UNMAPPED)) {
558 ret2 = state->sid_to_unixid_fn(state->dom,
561 if (!NT_STATUS_IS_OK(ret2)) {
563 /* if it is just a failed mapping, continue */
565 (ret2, NT_STATUS_NONE_MAPPED)) {
567 /* make sure it is marked as unmapped */
568 state->ids[i]->status = ID_UNMAPPED;
569 ret = STATUS_SOME_UNMAPPED;
572 * some fatal error occurred,
579 /* all ok, id is mapped */
580 state->ids[i]->status = ID_MAPPED;
584 if (state->ids[i]->status == ID_MAPPED) {
588 if ((state->ids[i]->status == ID_UNMAPPED) &&
589 state->allocate_unmapped) {
591 idmap_tdb_common_new_mapping(state->dom,
593 if (!NT_STATUS_IS_OK(ret)) {
602 if (NT_STATUS_IS_OK(ret) ||
603 NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED)) {
604 if (i == 0 || num_mapped == 0) {
605 ret = NT_STATUS_NONE_MAPPED;
606 } else if (num_mapped < i) {
607 ret = STATUS_SOME_UNMAPPED;
616 NTSTATUS idmap_tdb_common_sids_to_unixids(struct idmap_domain * dom,
617 struct id_map ** ids)
621 struct idmap_tdb_common_sids_to_unixids_context state;
622 struct idmap_tdb_common_context *ctx;
625 talloc_get_type_abort(dom->private_data,
626 struct idmap_tdb_common_context);
628 /* initialize the status to avoid surprise */
629 for (i = 0; ids[i]; i++) {
630 ids[i]->status = ID_UNKNOWN;
635 state.allocate_unmapped = false;
636 if (ctx->sid_to_unixid_fn == NULL) {
637 state.sid_to_unixid_fn = idmap_tdb_common_sid_to_unixid;
639 state.sid_to_unixid_fn = ctx->sid_to_unixid_fn;
642 ret = idmap_tdb_common_sids_to_unixids_action(ctx->db, &state);
644 if ( (NT_STATUS_EQUAL(ret, STATUS_SOME_UNMAPPED) ||
645 NT_STATUS_EQUAL(ret, NT_STATUS_NONE_MAPPED)) &&
647 state.allocate_unmapped = true;
648 ret = dbwrap_trans_do(ctx->db,
649 idmap_tdb_common_sids_to_unixids_action,