54797ef5010c7c1b3018ecb75a3b95de3d47f672
[samba.git] / auth / auth_sam_reply.c
1 /*
2    Unix SMB/CIFS implementation.
3
4    Convert a server info struct into the form for PAC and NETLOGON replies
5
6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2004-2011
7    Copyright (C) Stefan Metzmacher <metze@samba.org>  2005
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 "librpc/gen_ndr/auth.h"
25 #include "libcli/security/security.h"
26 #include "auth/auth_sam_reply.h"
27
28 NTSTATUS auth_convert_user_info_dc_sambaseinfo(TALLOC_CTX *mem_ctx,
29                                               struct auth_user_info_dc *user_info_dc,
30                                               struct netr_SamBaseInfo **_sam)
31 {
32         NTSTATUS status;
33         struct auth_user_info *info;
34         struct netr_SamBaseInfo *sam = talloc_zero(mem_ctx, struct netr_SamBaseInfo);
35         NT_STATUS_HAVE_NO_MEMORY(sam);
36
37         if (user_info_dc->num_sids > PRIMARY_USER_SID_INDEX) {
38                 status = dom_sid_split_rid(sam, &user_info_dc->sids[PRIMARY_USER_SID_INDEX],
39                                            &sam->domain_sid, &sam->rid);
40                 if (!NT_STATUS_IS_OK(status)) {
41                         return status;
42                 }
43         } else {
44                 return NT_STATUS_INVALID_PARAMETER;
45         }
46
47         if (user_info_dc->num_sids > PRIMARY_GROUP_SID_INDEX) {
48                 status = dom_sid_split_rid(NULL, &user_info_dc->sids[PRIMARY_GROUP_SID_INDEX],
49                                            NULL, &sam->primary_gid);
50                 if (!NT_STATUS_IS_OK(status)) {
51                         return status;
52                 }
53         } else {
54                 /* if we have to encode something like SYSTEM (with no
55                  * second SID in the token) then this is the only
56                  * choice */
57                 sam->primary_gid = sam->rid;
58         }
59
60         info = user_info_dc->info;
61
62         sam->last_logon = info->last_logon;
63         sam->last_logoff =  info->last_logoff;
64         sam->acct_expiry = info->acct_expiry;
65         sam->last_password_change = info->last_password_change;
66         sam->allow_password_change = info->allow_password_change;
67         sam->force_password_change = info->force_password_change;
68
69         sam->account_name.string = info->account_name;
70         sam->full_name.string = info->full_name;
71         sam->logon_script.string = info->logon_script;
72         sam->profile_path.string = info->profile_path;
73         sam->home_directory.string = info->home_directory;
74         sam->home_drive.string = info->home_drive;
75
76         sam->logon_count = info->logon_count;
77         sam->bad_password_count = info->bad_password_count;
78         sam->groups.count = 0;
79         sam->groups.rids = NULL;
80
81         if (user_info_dc->num_sids > 2) {
82                 size_t i;
83                 sam->groups.rids = talloc_array(sam, struct samr_RidWithAttribute,
84                                                 user_info_dc->num_sids);
85
86                 if (sam->groups.rids == NULL)
87                         return NT_STATUS_NO_MEMORY;
88
89                 for (i=2; i<user_info_dc->num_sids; i++) {
90                         struct dom_sid *group_sid = &user_info_dc->sids[i];
91                         if (!dom_sid_in_domain(sam->domain_sid, group_sid)) {
92                                 /* We handle this elsewhere */
93                                 continue;
94                         }
95                         sam->groups.rids[sam->groups.count].rid =
96                                 group_sid->sub_auths[group_sid->num_auths-1];
97
98                         sam->groups.rids[sam->groups.count].attributes =
99                                 SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
100                         sam->groups.count += 1;
101                 }
102         }
103
104         sam->user_flags = 0; /* w2k3 uses NETLOGON_EXTRA_SIDS | NETLOGON_NTLMV2_ENABLED */
105         sam->acct_flags = user_info_dc->info->acct_flags;
106         sam->logon_server.string = user_info_dc->info->logon_server;
107         sam->domain.string = user_info_dc->info->domain_name;
108
109         ZERO_STRUCT(sam->unknown);
110
111         ZERO_STRUCT(sam->key);
112         if (user_info_dc->user_session_key.length == sizeof(sam->key.key)) {
113                 memcpy(sam->key.key, user_info_dc->user_session_key.data, sizeof(sam->key.key));
114         }
115
116         ZERO_STRUCT(sam->LMSessKey);
117         if (user_info_dc->lm_session_key.length == sizeof(sam->LMSessKey.key)) {
118                 memcpy(sam->LMSessKey.key, user_info_dc->lm_session_key.data,
119                        sizeof(sam->LMSessKey.key));
120         }
121
122         *_sam = sam;
123
124         return NT_STATUS_OK;
125 }
126
127 /* Note that the validity of the _sam3 structure is only as long as
128  * the user_info_dc it was generated from */
129 NTSTATUS auth_convert_user_info_dc_saminfo3(TALLOC_CTX *mem_ctx,
130                                            struct auth_user_info_dc *user_info_dc,
131                                            struct netr_SamInfo3 **_sam3)
132 {
133         struct netr_SamBaseInfo *sam;
134         struct netr_SamInfo3 *sam3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
135         NTSTATUS status;
136         size_t i;
137         NT_STATUS_HAVE_NO_MEMORY(sam3);
138
139         status = auth_convert_user_info_dc_sambaseinfo(sam3, user_info_dc, &sam);
140         if (!NT_STATUS_IS_OK(status)) {
141                 talloc_free(sam3);
142                 return status;
143         }
144         sam3->base = *sam;
145         sam3->sidcount  = 0;
146         sam3->sids      = NULL;
147
148
149         sam3->sids = talloc_array(sam, struct netr_SidAttr,
150                                   user_info_dc->num_sids);
151         NT_STATUS_HAVE_NO_MEMORY_AND_FREE(sam3->sids, sam3);
152
153         /* We don't put the user and group SIDs in there */
154         for (i=2; i<user_info_dc->num_sids; i++) {
155                 if (dom_sid_in_domain(sam->domain_sid, &user_info_dc->sids[i])) {
156                         continue;
157                 }
158                 sam3->sids[sam3->sidcount].sid = dom_sid_dup(sam3->sids, &user_info_dc->sids[i]);
159                 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(sam3->sids[sam3->sidcount].sid, sam3);
160                 sam3->sids[sam3->sidcount].attributes =
161                         SE_GROUP_MANDATORY | SE_GROUP_ENABLED_BY_DEFAULT | SE_GROUP_ENABLED;
162                 sam3->sidcount += 1;
163         }
164         if (sam3->sidcount) {
165                 sam3->base.user_flags |= NETLOGON_EXTRA_SIDS;
166         } else {
167                 sam3->sids = NULL;
168         }
169         *_sam3 = sam3;
170
171         return NT_STATUS_OK;
172 }
173
174 /**
175  * Make a user_info_dc struct from the info3 returned by a domain logon
176  */
177 NTSTATUS make_user_info_dc_netlogon_validation(TALLOC_CTX *mem_ctx,
178                                               const char *account_name,
179                                               uint16_t validation_level,
180                                               union netr_Validation *validation,
181                                               struct auth_user_info_dc **_user_info_dc)
182 {
183         struct auth_user_info_dc *user_info_dc;
184         struct auth_user_info *info;
185         struct netr_SamBaseInfo *base = NULL;
186         uint32_t i;
187
188         switch (validation_level) {
189         case 2:
190                 if (!validation || !validation->sam2) {
191                         return NT_STATUS_INVALID_PARAMETER;
192                 }
193                 base = &validation->sam2->base;
194                 break;
195         case 3:
196                 if (!validation || !validation->sam3) {
197                         return NT_STATUS_INVALID_PARAMETER;
198                 }
199                 base = &validation->sam3->base;
200                 break;
201         case 6:
202                 if (!validation || !validation->sam6) {
203                         return NT_STATUS_INVALID_PARAMETER;
204                 }
205                 base = &validation->sam6->base;
206                 break;
207         default:
208                 return NT_STATUS_INVALID_LEVEL;
209         }
210
211         user_info_dc = talloc(mem_ctx, struct auth_user_info_dc);
212         NT_STATUS_HAVE_NO_MEMORY(user_info_dc);
213
214         /*
215            Here is where we should check the list of
216            trusted domains, and verify that the SID
217            matches.
218         */
219         if (!base->domain_sid) {
220                 DEBUG(0, ("Cannot operate on a Netlogon Validation without a domain SID"));
221                 return NT_STATUS_INVALID_PARAMETER;
222         }
223
224         /* The IDL layer would be a better place to check this, but to
225          * guard the integer addition below, we double-check */
226         if (base->groups.count > 65535) {
227                 return NT_STATUS_INVALID_PARAMETER;
228         }
229
230         user_info_dc->num_sids = 2;
231
232         user_info_dc->sids = talloc_array(user_info_dc, struct dom_sid,  user_info_dc->num_sids + base->groups.count);
233         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->sids);
234
235         user_info_dc->sids[PRIMARY_USER_SID_INDEX] = *base->domain_sid;
236         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_USER_SID_INDEX], base->rid)) {
237                 return NT_STATUS_INVALID_PARAMETER;
238         }
239
240         user_info_dc->sids[PRIMARY_GROUP_SID_INDEX] = *base->domain_sid;
241         if (!sid_append_rid(&user_info_dc->sids[PRIMARY_GROUP_SID_INDEX], base->primary_gid)) {
242                 return NT_STATUS_INVALID_PARAMETER;
243         }
244
245         for (i = 0; i < base->groups.count; i++) {
246                 user_info_dc->sids[user_info_dc->num_sids] = *base->domain_sid;
247                 if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids], base->groups.rids[i].rid)) {
248                         return NT_STATUS_INVALID_PARAMETER;
249                 }
250                 user_info_dc->num_sids++;
251         }
252
253         /* Copy 'other' sids.  We need to do sid filtering here to
254            prevent possible elevation of privileges.  See:
255
256            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
257          */
258
259         if (validation_level == 3) {
260                 struct dom_sid *dgrps = user_info_dc->sids;
261                 size_t sidcount;
262
263                 /* The IDL layer would be a better place to check this, but to
264                  * guard the integer addition below, we double-check */
265                 if (validation->sam3->sidcount > 65535) {
266                         return NT_STATUS_INVALID_PARAMETER;
267                 }
268
269                 sidcount = user_info_dc->num_sids + validation->sam3->sidcount;
270                 if (validation->sam3->sidcount > 0) {
271                         dgrps = talloc_realloc(user_info_dc, dgrps, struct dom_sid, sidcount);
272                         NT_STATUS_HAVE_NO_MEMORY(dgrps);
273
274                         for (i = 0; i < validation->sam3->sidcount; i++) {
275                                 if (validation->sam3->sids[i].sid) {
276                                         dgrps[user_info_dc->num_sids] = *validation->sam3->sids[i].sid;
277                                         user_info_dc->num_sids++;
278                                 }
279                         }
280                 }
281
282                 user_info_dc->sids = dgrps;
283
284                 /* Where are the 'global' sids?... */
285         }
286
287         user_info_dc->info = info = talloc_zero(user_info_dc, struct auth_user_info);
288         NT_STATUS_HAVE_NO_MEMORY(user_info_dc->info);
289
290         if (base->account_name.string) {
291                 info->account_name = talloc_reference(info, base->account_name.string);
292         } else {
293                 info->account_name = talloc_strdup(info, account_name);
294                 NT_STATUS_HAVE_NO_MEMORY(info->account_name);
295         }
296
297         info->domain_name = talloc_reference(info, base->domain.string);
298         info->full_name = talloc_reference(info, base->full_name.string);
299         info->logon_script = talloc_reference(info, base->logon_script.string);
300         info->profile_path = talloc_reference(info, base->profile_path.string);
301         info->home_directory = talloc_reference(info, base->home_directory.string);
302         info->home_drive = talloc_reference(info, base->home_drive.string);
303         info->logon_server = talloc_reference(info, base->logon_server.string);
304         info->last_logon = base->last_logon;
305         info->last_logoff = base->last_logoff;
306         info->acct_expiry = base->acct_expiry;
307         info->last_password_change = base->last_password_change;
308         info->allow_password_change = base->allow_password_change;
309         info->force_password_change = base->force_password_change;
310         info->logon_count = base->logon_count;
311         info->bad_password_count = base->bad_password_count;
312         info->acct_flags = base->acct_flags;
313
314         info->authenticated = true;
315
316         /* ensure we are never given NULL session keys */
317
318         if (all_zero(base->key.key, sizeof(base->key.key))) {
319                 user_info_dc->user_session_key = data_blob(NULL, 0);
320         } else {
321                 user_info_dc->user_session_key = data_blob_talloc(user_info_dc, base->key.key, sizeof(base->key.key));
322                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->user_session_key.data);
323         }
324
325         if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
326                 user_info_dc->lm_session_key = data_blob(NULL, 0);
327         } else {
328                 user_info_dc->lm_session_key = data_blob_talloc(user_info_dc, base->LMSessKey.key, sizeof(base->LMSessKey.key));
329                 NT_STATUS_HAVE_NO_MEMORY(user_info_dc->lm_session_key.data);
330         }
331
332         *_user_info_dc = user_info_dc;
333         return NT_STATUS_OK;
334 }
335
336 /**
337  * Make a user_info_dc struct from the PAC_LOGON_INFO supplied in the krb5 logon
338  */
339 NTSTATUS make_user_info_dc_pac(TALLOC_CTX *mem_ctx,
340                               struct PAC_LOGON_INFO *pac_logon_info,
341                               struct auth_user_info_dc **_user_info_dc)
342 {
343         uint32_t i;
344         NTSTATUS nt_status;
345         union netr_Validation validation;
346         struct auth_user_info_dc *user_info_dc;
347
348         validation.sam3 = &pac_logon_info->info3;
349
350         nt_status = make_user_info_dc_netlogon_validation(mem_ctx, "", 3, &validation, &user_info_dc);
351         if (!NT_STATUS_IS_OK(nt_status)) {
352                 return nt_status;
353         }
354
355         if (pac_logon_info->res_groups.count > 0) {
356                 size_t sidcount;
357                 /* The IDL layer would be a better place to check this, but to
358                  * guard the integer addition below, we double-check */
359                 if (pac_logon_info->res_groups.count > 65535) {
360                         talloc_free(user_info_dc);
361                         return NT_STATUS_INVALID_PARAMETER;
362                 }
363
364                 /*
365                   Here is where we should check the list of
366                   trusted domains, and verify that the SID
367                   matches.
368                 */
369                 if (!pac_logon_info->res_group_dom_sid) {
370                         DEBUG(0, ("Cannot operate on a PAC without a resource domain SID"));
371                         return NT_STATUS_INVALID_PARAMETER;
372                 }
373
374                 sidcount = user_info_dc->num_sids + pac_logon_info->res_groups.count;
375                 user_info_dc->sids
376                         = talloc_realloc(user_info_dc, user_info_dc->sids, struct dom_sid, sidcount);
377                 NT_STATUS_HAVE_NO_MEMORY_AND_FREE(user_info_dc->sids, user_info_dc);
378
379                 for (i = 0; pac_logon_info->res_group_dom_sid && i < pac_logon_info->res_groups.count; i++) {
380                         user_info_dc->sids[user_info_dc->num_sids] = *pac_logon_info->res_group_dom_sid;
381                         if (!sid_append_rid(&user_info_dc->sids[user_info_dc->num_sids],
382                                             pac_logon_info->res_groups.rids[i].rid)) {
383                                 return NT_STATUS_INVALID_PARAMETER;
384                         }
385                         user_info_dc->num_sids++;
386                 }
387         }
388         *_user_info_dc = user_info_dc;
389         return NT_STATUS_OK;
390 }