2 Unix SMB/CIFS implementation.
3 Authentication utility functions
4 Copyright (C) Volker Lendecke 2010
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include "lib/util_unixsids.h"
23 #include "../lib/crypto/arcfour.h"
24 #include "../librpc/gen_ndr/netlogon.h"
25 #include "../libcli/security/security.h"
26 #include "rpc_client/util_netlogon.h"
27 #include "nsswitch/libwbclient/wbclient.h"
28 #include "lib/winbind_util.h"
32 #define DBGC_CLASS DBGC_AUTH
34 /***************************************************************************
35 Make a server_info struct. Free with TALLOC_FREE().
36 ***************************************************************************/
38 struct auth_serversupplied_info *make_server_info(TALLOC_CTX *mem_ctx)
40 struct auth_serversupplied_info *result;
42 result = talloc_zero(mem_ctx, struct auth_serversupplied_info);
44 DEBUG(0, ("talloc failed\n"));
48 /* Initialise the uid and gid values to something non-zero
49 which may save us from giving away root access if there
50 is a bug in allocating these fields. */
52 result->utok.uid = -1;
53 result->utok.gid = -1;
58 /****************************************************************************
59 inits a netr_SamInfo2 structure from an auth_serversupplied_info. sam2 must
60 already be initialized and is used as the talloc parent for its members.
61 *****************************************************************************/
63 NTSTATUS serverinfo_to_SamInfo2(struct auth_serversupplied_info *server_info,
64 struct netr_SamInfo2 *sam2)
66 struct netr_SamInfo3 *info3 = NULL;
69 status = copy_netr_SamInfo3(sam2,
72 if (!NT_STATUS_IS_OK(status)) {
76 if (server_info->session_key.length) {
77 memcpy(info3->base.key.key,
78 server_info->session_key.data,
79 MIN(sizeof(info3->base.key.key),
80 server_info->session_key.length));
82 if (server_info->lm_session_key.length) {
83 memcpy(info3->base.LMSessKey.key,
84 server_info->lm_session_key.data,
85 MIN(sizeof(info3->base.LMSessKey.key),
86 server_info->lm_session_key.length));
89 sam2->base = info3->base;
94 /****************************************************************************
95 inits a netr_SamInfo3 structure from an auth_serversupplied_info. sam3 must
96 already be initialized and is used as the talloc parent for its members.
97 *****************************************************************************/
99 NTSTATUS serverinfo_to_SamInfo3(const struct auth_serversupplied_info *server_info,
100 struct netr_SamInfo3 *sam3)
102 struct netr_SamInfo3 *info3 = NULL;
105 status = copy_netr_SamInfo3(sam3,
108 if (!NT_STATUS_IS_OK(status)) {
112 if (server_info->session_key.length) {
113 memcpy(info3->base.key.key,
114 server_info->session_key.data,
115 MIN(sizeof(info3->base.key.key),
116 server_info->session_key.length));
118 if (server_info->lm_session_key.length) {
119 memcpy(info3->base.LMSessKey.key,
120 server_info->lm_session_key.data,
121 MIN(sizeof(info3->base.LMSessKey.key),
122 server_info->lm_session_key.length));
125 sam3->base = info3->base;
133 /****************************************************************************
134 inits a netr_SamInfo6 structure from an auth_serversupplied_info. sam6 must
135 already be initialized and is used as the talloc parent for its members.
136 *****************************************************************************/
138 NTSTATUS serverinfo_to_SamInfo6(struct auth_serversupplied_info *server_info,
139 struct netr_SamInfo6 *sam6)
141 struct pdb_domain_info *dominfo;
142 struct netr_SamInfo3 *info3 = NULL;
145 if ((pdb_capabilities() & PDB_CAP_ADS) == 0) {
146 DEBUG(10,("Not adding validation info level 6 "
147 "without ADS passdb backend\n"));
148 return NT_STATUS_INVALID_INFO_CLASS;
151 dominfo = pdb_get_domain_info(sam6);
152 if (dominfo == NULL) {
153 return NT_STATUS_NO_MEMORY;
156 status = copy_netr_SamInfo3(sam6,
159 if (!NT_STATUS_IS_OK(status)) {
163 if (server_info->session_key.length) {
164 memcpy(info3->base.key.key,
165 server_info->session_key.data,
166 MIN(sizeof(info3->base.key.key),
167 server_info->session_key.length));
169 if (server_info->lm_session_key.length) {
170 memcpy(info3->base.LMSessKey.key,
171 server_info->lm_session_key.data,
172 MIN(sizeof(info3->base.LMSessKey.key),
173 server_info->lm_session_key.length));
176 sam6->base = info3->base;
181 sam6->dns_domainname.string = talloc_strdup(sam6, dominfo->dns_domain);
182 if (sam6->dns_domainname.string == NULL) {
183 return NT_STATUS_NO_MEMORY;
186 sam6->principal_name.string = talloc_asprintf(
187 sam6, "%s@%s", sam6->base.account_name.string,
188 sam6->dns_domainname.string);
189 if (sam6->principal_name.string == NULL) {
190 return NT_STATUS_NO_MEMORY;
196 static NTSTATUS append_netr_SidAttr(TALLOC_CTX *mem_ctx,
197 struct netr_SidAttr **sids,
199 const struct dom_sid2 *asid,
204 *sids = talloc_realloc(mem_ctx, *sids, struct netr_SidAttr, t + 1);
206 return NT_STATUS_NO_MEMORY;
208 (*sids)[t].sid = dom_sid_dup(*sids, asid);
209 if ((*sids)[t].sid == NULL) {
210 return NT_STATUS_NO_MEMORY;
212 (*sids)[t].attributes = attributes;
218 /* Fills the samr_RidWithAttributeArray with the provided sids.
219 * If it happens that we have additional groups that do not belong
220 * to the domain, add their sids as extra sids */
221 static NTSTATUS group_sids_to_info3(struct netr_SamInfo3 *info3,
222 const struct dom_sid *sids,
225 uint32_t attributes = SE_GROUP_MANDATORY |
226 SE_GROUP_ENABLED_BY_DEFAULT |
228 struct samr_RidWithAttributeArray *groups;
229 struct dom_sid *domain_sid;
235 domain_sid = info3->base.domain_sid;
236 groups = &info3->base.groups;
238 groups->rids = talloc_array(info3,
239 struct samr_RidWithAttribute, num_sids);
241 return NT_STATUS_NO_MEMORY;
244 for (i = 0; i < num_sids; i++) {
245 ok = sid_peek_check_rid(domain_sid, &sids[i], &rid);
247 /* store domain group rid */
248 groups->rids[groups->count].rid = rid;
249 groups->rids[groups->count].attributes = attributes;
254 /* if this wasn't a domain sid, add it as extra sid */
255 status = append_netr_SidAttr(info3, &info3->sids,
257 &sids[i], attributes);
258 if (!NT_STATUS_IS_OK(status)) {
267 * Merge resource SIDs, if any, into the passed in info3 structure.
270 static NTSTATUS merge_resource_sids(const struct PAC_LOGON_INFO *logon_info,
271 struct netr_SamInfo3 *info3)
274 const struct PAC_DOMAIN_GROUP_MEMBERSHIP *rg = NULL;
276 if (logon_info->info3.base.user_flags & NETLOGON_RESOURCE_GROUPS) {
277 rg = &logon_info->resource_groups;
284 if (rg->domain_sid == NULL) {
285 DEBUG(10, ("Missing Resource Group Domain SID\n"));
286 return NT_STATUS_INVALID_PARAMETER;
289 /* The IDL layer would be a better place to check this, but to
290 * guard the integer addition below, we double-check */
291 if (rg->groups.count > 65535) {
292 DEBUG(10, ("Too much Resource Group RIDs %u\n",
293 (unsigned)rg->groups.count));
294 return NT_STATUS_INVALID_PARAMETER;
298 * If there are any resource groups (SID Compression) add
299 * them to the extra sids portion of the info3 in the PAC.
301 * This makes the info3 look like it would if we got the info
302 * from the DC rather than the PAC.
306 * Construct a SID for each RID in the list and then append it
309 for (i = 0; i < rg->groups.count; i++) {
311 struct dom_sid new_sid;
312 uint32_t attributes = rg->groups.rids[i].attributes;
314 sid_compose(&new_sid,
316 rg->groups.rids[i].rid);
318 DEBUG(10, ("Adding SID %s to extra SIDS\n",
319 sid_string_dbg(&new_sid)));
321 status = append_netr_SidAttr(info3, &info3->sids,
325 if (!NT_STATUS_IS_OK(status)) {
326 DEBUG(1, ("failed to append SID %s to extra SIDS: %s\n",
327 sid_string_dbg(&new_sid),
337 * Create a copy of an info3 struct from the struct PAC_LOGON_INFO,
338 * then merge resource SIDs, if any, into it. If successful return
339 * the created info3 struct.
342 NTSTATUS create_info3_from_pac_logon_info(TALLOC_CTX *mem_ctx,
343 const struct PAC_LOGON_INFO *logon_info,
344 struct netr_SamInfo3 **pp_info3)
347 struct netr_SamInfo3 *info3 = NULL;
349 status = copy_netr_SamInfo3(mem_ctx,
352 if (!NT_STATUS_IS_OK(status)) {
356 status = merge_resource_sids(logon_info, info3);
357 if (!NT_STATUS_IS_OK(status)) {
366 * Create a copy of an info6 struct from the PAC_UPN_DNS_INFO and PAC_LOGON_INFO
367 * then merge resource SIDs, if any, into it. If successful return the created
370 NTSTATUS create_info6_from_pac(TALLOC_CTX *mem_ctx,
371 const struct PAC_LOGON_INFO *logon_info,
372 const struct PAC_UPN_DNS_INFO *upn_dns_info,
373 struct netr_SamInfo6 **pp_info6)
376 struct netr_SamInfo6 *info6 = NULL;
377 struct netr_SamInfo3 *info3 = NULL;
379 info6 = talloc_zero(mem_ctx, struct netr_SamInfo6);
381 return NT_STATUS_NO_MEMORY;
384 status = copy_netr_SamInfo3(info6,
387 if (!NT_STATUS_IS_OK(status)) {
392 status = merge_resource_sids(logon_info, info3);
393 if (!NT_STATUS_IS_OK(status)) {
398 info6->base = info3->base;
399 info6->sids = info3->sids;
400 info6->sidcount = info3->sidcount;
402 if (upn_dns_info != NULL) {
403 info6->dns_domainname.string = talloc_strdup(info6,
404 upn_dns_info->dns_domain_name);
405 if (info6->dns_domainname.string == NULL) {
407 return NT_STATUS_NO_MEMORY;
409 info6->principal_name.string = talloc_strdup(info6,
410 upn_dns_info->upn_name);
411 if (info6->principal_name.string == NULL) {
413 return NT_STATUS_NO_MEMORY;
422 * Check if this is a "Unix Users" domain user, or a
423 * "Unix Groups" domain group, we need to handle it
424 * in a special way if that's the case.
427 static NTSTATUS SamInfo3_handle_sids(const char *username,
428 const struct dom_sid *user_sid,
429 const struct dom_sid *group_sid,
430 struct netr_SamInfo3 *info3,
431 struct dom_sid *domain_sid,
432 struct extra_auth_info *extra)
434 if (sid_check_is_in_unix_users(user_sid)) {
435 /* in info3 you can only set rids for the user and the
436 * primary group, and the domain sid must be that of
439 * Store a completely bogus value here.
440 * The real SID is stored in the extra sids.
441 * Other code will know to look there if (-1) is found
443 info3->base.rid = (uint32_t)(-1);
444 sid_copy(&extra->user_sid, user_sid);
446 DEBUG(10, ("Unix User found. Rid marked as "
447 "special and sid (%s) saved as extra sid\n",
448 sid_string_dbg(user_sid)));
450 sid_copy(domain_sid, user_sid);
451 sid_split_rid(domain_sid, &info3->base.rid);
454 if (is_null_sid(domain_sid)) {
455 sid_copy(domain_sid, get_global_sam_sid());
458 /* check if this is a "Unix Groups" domain group,
459 * if so we need special handling */
460 if (sid_check_is_in_unix_groups(group_sid)) {
461 /* in info3 you can only set rids for the user and the
462 * primary group, and the domain sid must be that of
465 * Store a completely bogus value here.
466 * The real SID is stored in the extra sids.
467 * Other code will know to look there if (-1) is found
469 info3->base.primary_gid = (uint32_t)(-1);
470 sid_copy(&extra->pgid_sid, group_sid);
472 DEBUG(10, ("Unix Group found. Rid marked as "
473 "special and sid (%s) saved as extra sid\n",
474 sid_string_dbg(group_sid)));
476 bool ok = sid_peek_check_rid(domain_sid, group_sid,
477 &info3->base.primary_gid);
479 DEBUG(1, ("The primary group domain sid(%s) does not "
480 "match the domain sid(%s) for %s(%s)\n",
481 sid_string_dbg(group_sid),
482 sid_string_dbg(domain_sid),
484 sid_string_dbg(user_sid)));
485 return NT_STATUS_INVALID_SID;
491 #define RET_NOMEM(ptr) do { \
493 TALLOC_FREE(info3); \
494 return NT_STATUS_NO_MEMORY; \
497 NTSTATUS samu_to_SamInfo3(TALLOC_CTX *mem_ctx,
499 const char *login_server,
500 struct netr_SamInfo3 **_info3,
501 struct extra_auth_info *extra)
503 struct netr_SamInfo3 *info3;
504 const struct dom_sid *user_sid;
505 const struct dom_sid *group_sid;
506 struct dom_sid domain_sid;
507 struct dom_sid *group_sids;
508 uint32_t num_group_sids = 0;
513 user_sid = pdb_get_user_sid(samu);
514 group_sid = pdb_get_group_sid(samu);
516 if (!user_sid || !group_sid) {
517 DEBUG(1, ("Sam account is missing sids!\n"));
518 return NT_STATUS_UNSUCCESSFUL;
521 info3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
523 return NT_STATUS_NO_MEMORY;
526 ZERO_STRUCT(domain_sid);
528 status = SamInfo3_handle_sids(pdb_get_username(samu),
535 if (!NT_STATUS_IS_OK(status)) {
540 unix_to_nt_time(&info3->base.logon_time, pdb_get_logon_time(samu));
541 unix_to_nt_time(&info3->base.logoff_time, get_time_t_max());
542 unix_to_nt_time(&info3->base.kickoff_time, get_time_t_max());
543 unix_to_nt_time(&info3->base.last_password_change,
544 pdb_get_pass_last_set_time(samu));
545 unix_to_nt_time(&info3->base.allow_password_change,
546 pdb_get_pass_can_change_time(samu));
547 unix_to_nt_time(&info3->base.force_password_change,
548 pdb_get_pass_must_change_time(samu));
550 tmp = pdb_get_username(samu);
552 info3->base.account_name.string = talloc_strdup(info3, tmp);
553 RET_NOMEM(info3->base.account_name.string);
555 tmp = pdb_get_fullname(samu);
557 info3->base.full_name.string = talloc_strdup(info3, tmp);
558 RET_NOMEM(info3->base.full_name.string);
560 tmp = pdb_get_logon_script(samu);
562 info3->base.logon_script.string = talloc_strdup(info3, tmp);
563 RET_NOMEM(info3->base.logon_script.string);
565 tmp = pdb_get_profile_path(samu);
567 info3->base.profile_path.string = talloc_strdup(info3, tmp);
568 RET_NOMEM(info3->base.profile_path.string);
570 tmp = pdb_get_homedir(samu);
572 info3->base.home_directory.string = talloc_strdup(info3, tmp);
573 RET_NOMEM(info3->base.home_directory.string);
575 tmp = pdb_get_dir_drive(samu);
577 info3->base.home_drive.string = talloc_strdup(info3, tmp);
578 RET_NOMEM(info3->base.home_drive.string);
581 info3->base.logon_count = pdb_get_logon_count(samu);
582 info3->base.bad_password_count = pdb_get_bad_password_count(samu);
584 info3->base.logon_domain.string = talloc_strdup(info3,
585 pdb_get_domain(samu));
586 RET_NOMEM(info3->base.logon_domain.string);
588 info3->base.domain_sid = dom_sid_dup(info3, &domain_sid);
589 RET_NOMEM(info3->base.domain_sid);
591 status = pdb_enum_group_memberships(mem_ctx, samu,
594 if (!NT_STATUS_IS_OK(status)) {
595 DEBUG(1, ("Failed to get groups from sam account.\n"));
600 if (num_group_sids) {
601 status = group_sids_to_info3(info3, group_sids, num_group_sids);
602 if (!NT_STATUS_IS_OK(status)) {
608 /* We don't need sids and gids after the conversion */
609 TALLOC_FREE(group_sids);
613 /* FIXME: should we add other flags ? */
614 info3->base.user_flags = NETLOGON_EXTRA_SIDS;
617 info3->base.logon_server.string = talloc_strdup(info3, login_server);
618 RET_NOMEM(info3->base.logon_server.string);
621 info3->base.acct_flags = pdb_get_acct_ctrl(samu);
627 NTSTATUS passwd_to_SamInfo3(TALLOC_CTX *mem_ctx,
628 const char *unix_username,
629 const struct passwd *pwd,
630 struct netr_SamInfo3 **pinfo3,
631 struct extra_auth_info *extra)
633 struct netr_SamInfo3 *info3;
636 const char *domain_name = NULL;
637 const char *user_name = NULL;
638 struct dom_sid domain_sid;
639 struct dom_sid user_sid;
640 struct dom_sid group_sid;
641 enum lsa_SidType type;
642 uint32_t num_sids = 0;
643 struct dom_sid *user_sids = NULL;
647 tmp_ctx = talloc_stackframe();
649 ok = lookup_name_smbconf(tmp_ctx,
657 status = NT_STATUS_NO_SUCH_USER;
661 if (type != SID_NAME_USER) {
662 status = NT_STATUS_NO_SUCH_USER;
666 ok = winbind_lookup_usersids(tmp_ctx,
670 /* Check if winbind is running */
673 * Winbind is running and the first element of the user_sids
674 * is the primary group.
677 group_sid = user_sids[0];
681 * Winbind is not running, try to create the group_sid from the
686 * This can lead to a primary group of S-1-22-2-XX which
687 * will be rejected by other Samba code.
689 gid_to_sid(&group_sid, pwd->pw_gid);
693 * If we are a unix group, or a wellknown/builtin alias,
694 * set the group_sid to the
695 * 'Domain Users' RID of 513 which will always resolve to a
698 if (sid_check_is_in_unix_groups(&group_sid) ||
699 sid_check_is_in_builtin(&group_sid) ||
700 sid_check_is_in_wellknown_domain(&group_sid)) {
701 if (sid_check_is_in_unix_users(&user_sid)) {
702 sid_compose(&group_sid,
703 get_global_sam_sid(),
706 sid_copy(&domain_sid, &user_sid);
707 sid_split_rid(&domain_sid, NULL);
708 sid_compose(&group_sid,
714 /* Make sure we have a valid group sid */
715 is_null = is_null_sid(&group_sid);
717 status = NT_STATUS_NO_SUCH_USER;
721 /* Construct a netr_SamInfo3 from the information we have */
722 info3 = talloc_zero(tmp_ctx, struct netr_SamInfo3);
724 status = NT_STATUS_NO_MEMORY;
728 info3->base.account_name.string = talloc_strdup(info3, unix_username);
729 if (info3->base.account_name.string == NULL) {
730 status = NT_STATUS_NO_MEMORY;
734 ZERO_STRUCT(domain_sid);
736 status = SamInfo3_handle_sids(unix_username,
743 if (!NT_STATUS_IS_OK(status)) {
747 info3->base.domain_sid = dom_sid_dup(info3, &domain_sid);
748 if (info3->base.domain_sid == NULL) {
749 status = NT_STATUS_NO_MEMORY;
753 ok = sid_peek_check_rid(&domain_sid, &group_sid,
754 &info3->base.primary_gid);
756 DEBUG(1, ("The primary group domain sid(%s) does not "
757 "match the domain sid(%s) for %s(%s)\n",
758 sid_string_dbg(&group_sid),
759 sid_string_dbg(&domain_sid),
761 sid_string_dbg(&user_sid)));
762 status = NT_STATUS_INVALID_SID;
766 info3->base.acct_flags = ACB_NORMAL;
769 status = group_sids_to_info3(info3, user_sids, num_sids);
770 if (!NT_STATUS_IS_OK(status)) {
775 *pinfo3 = talloc_steal(mem_ctx, info3);
777 status = NT_STATUS_OK;
779 talloc_free(tmp_ctx);