s4:lib/tevent: rename structs
[gd/samba-autobuild/.git] / source4 / auth / session.c
1 /* 
2    Unix SMB/CIFS implementation.
3    Authentication utility functions
4    Copyright (C) Andrew Tridgell 1992-1998
5    Copyright (C) Andrew Bartlett 2001
6    Copyright (C) Jeremy Allison 2000-2001
7    Copyright (C) Rafal Szczesniak 2002
8    Copyright (C) Stefan Metzmacher 2005
9
10    This program is free software; you can redistribute it and/or modify
11    it under the terms of the GNU General Public License as published by
12    the Free Software Foundation; either version 3 of the License, or
13    (at your option) any later version.
14    
15    This program is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18    GNU General Public License for more details.
19    
20    You should have received a copy of the GNU General Public License
21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
22 */
23
24 #include "includes.h"
25 #include "auth/auth.h"
26 #include "libcli/security/security.h"
27 #include "libcli/auth/libcli_auth.h"
28 #include "dsdb/samdb/samdb.h"
29 #include "auth/credentials/credentials.h"
30 #include "param/param.h"
31 #include "auth/session_proto.h"
32
33 _PUBLIC_ struct auth_session_info *anonymous_session(TALLOC_CTX *mem_ctx, 
34                                             struct tevent_context *event_ctx, 
35                                             struct loadparm_context *lp_ctx) 
36 {
37         NTSTATUS nt_status;
38         struct auth_session_info *session_info = NULL;
39         nt_status = auth_anonymous_session_info(mem_ctx, event_ctx, lp_ctx, &session_info);
40         if (!NT_STATUS_IS_OK(nt_status)) {
41                 return NULL;
42         }
43         return session_info;
44 }
45
46 _PUBLIC_ NTSTATUS auth_anonymous_session_info(TALLOC_CTX *parent_ctx, 
47                                      struct tevent_context *event_ctx, 
48                                      struct loadparm_context *lp_ctx,
49                                      struct auth_session_info **_session_info) 
50 {
51         NTSTATUS nt_status;
52         struct auth_serversupplied_info *server_info = NULL;
53         struct auth_session_info *session_info = NULL;
54         TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
55         
56         nt_status = auth_anonymous_server_info(mem_ctx,
57                                                lp_netbios_name(lp_ctx),
58                                                &server_info);
59         if (!NT_STATUS_IS_OK(nt_status)) {
60                 talloc_free(mem_ctx);
61                 return nt_status;
62         }
63
64         /* references the server_info into the session_info */
65         nt_status = auth_generate_session_info(parent_ctx, event_ctx, lp_ctx, server_info, &session_info);
66         talloc_free(mem_ctx);
67
68         NT_STATUS_NOT_OK_RETURN(nt_status);
69
70         session_info->credentials = cli_credentials_init(session_info);
71         if (!session_info->credentials) {
72                 return NT_STATUS_NO_MEMORY;
73         }
74
75         cli_credentials_set_conf(session_info->credentials, lp_ctx);
76         cli_credentials_set_anonymous(session_info->credentials);
77         
78         *_session_info = session_info;
79
80         return NT_STATUS_OK;
81 }
82
83 _PUBLIC_ NTSTATUS auth_anonymous_server_info(TALLOC_CTX *mem_ctx, 
84                                     const char *netbios_name,
85                                     struct auth_serversupplied_info **_server_info) 
86 {
87         struct auth_serversupplied_info *server_info;
88         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
89         NT_STATUS_HAVE_NO_MEMORY(server_info);
90
91         server_info->account_sid = dom_sid_parse_talloc(server_info, SID_NT_ANONYMOUS);
92         NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid);
93
94         /* is this correct? */
95         server_info->primary_group_sid = dom_sid_parse_talloc(server_info, SID_BUILTIN_GUESTS);
96         NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid);
97
98         server_info->n_domain_groups = 0;
99         server_info->domain_groups = NULL;
100
101         /* annoying, but the Anonymous really does have a session key... */
102         server_info->user_session_key = data_blob_talloc(server_info, NULL, 16);
103         NT_STATUS_HAVE_NO_MEMORY(server_info->user_session_key.data);
104
105         server_info->lm_session_key = data_blob_talloc(server_info, NULL, 16);
106         NT_STATUS_HAVE_NO_MEMORY(server_info->lm_session_key.data);
107
108         /*  and it is all zeros! */
109         data_blob_clear(&server_info->user_session_key);
110         data_blob_clear(&server_info->lm_session_key);
111
112         server_info->account_name = talloc_strdup(server_info, "ANONYMOUS LOGON");
113         NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
114
115         server_info->domain_name = talloc_strdup(server_info, "NT AUTHORITY");
116         NT_STATUS_HAVE_NO_MEMORY(server_info->domain_name);
117
118         server_info->full_name = talloc_strdup(server_info, "Anonymous Logon");
119         NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
120
121         server_info->logon_script = talloc_strdup(server_info, "");
122         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
123
124         server_info->profile_path = talloc_strdup(server_info, "");
125         NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
126
127         server_info->home_directory = talloc_strdup(server_info, "");
128         NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
129
130         server_info->home_drive = talloc_strdup(server_info, "");
131         NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
132
133         server_info->logon_server = talloc_strdup(server_info, netbios_name);
134         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_server);
135
136         server_info->last_logon = 0;
137         server_info->last_logoff = 0;
138         server_info->acct_expiry = 0;
139         server_info->last_password_change = 0;
140         server_info->allow_password_change = 0;
141         server_info->force_password_change = 0;
142
143         server_info->logon_count = 0;
144         server_info->bad_password_count = 0;
145
146         server_info->acct_flags = ACB_NORMAL;
147
148         server_info->authenticated = false;
149
150         *_server_info = server_info;
151
152         return NT_STATUS_OK;
153 }
154
155 _PUBLIC_ NTSTATUS auth_generate_session_info(TALLOC_CTX *mem_ctx, 
156                                     struct tevent_context *event_ctx, 
157                                     struct loadparm_context *lp_ctx,
158                                     struct auth_serversupplied_info *server_info, 
159                                     struct auth_session_info **_session_info) 
160 {
161         struct auth_session_info *session_info;
162         NTSTATUS nt_status;
163
164         session_info = talloc(mem_ctx, struct auth_session_info);
165         NT_STATUS_HAVE_NO_MEMORY(session_info);
166
167         session_info->server_info = talloc_reference(session_info, server_info);
168
169         /* unless set otherwise, the session key is the user session
170          * key from the auth subsystem */ 
171         session_info->session_key = server_info->user_session_key;
172
173         nt_status = security_token_create(session_info,
174                                           event_ctx,
175                                           lp_ctx,
176                                           server_info->account_sid,
177                                           server_info->primary_group_sid,
178                                           server_info->n_domain_groups,
179                                           server_info->domain_groups,
180                                           server_info->authenticated,
181                                           &session_info->security_token);
182         NT_STATUS_NOT_OK_RETURN(nt_status);
183
184         session_info->credentials = NULL;
185
186         *_session_info = session_info;
187         return NT_STATUS_OK;
188 }
189
190 /**
191  * prints a struct auth_session_info security token to debug output.
192  */
193 void auth_session_info_debug(int dbg_lev, 
194                              const struct auth_session_info *session_info)
195 {
196         if (!session_info) {
197                 DEBUG(dbg_lev, ("Session Info: (NULL)\n"));
198                 return; 
199         }
200
201         security_token_debug(dbg_lev, session_info->security_token);
202 }
203
204 /**
205  * Make a server_info struct from the info3 returned by a domain logon 
206  */
207 _PUBLIC_ NTSTATUS make_server_info_netlogon_validation(TALLOC_CTX *mem_ctx,
208                                               const char *account_name,
209                                               uint16_t validation_level,
210                                               union netr_Validation *validation,
211                                               struct auth_serversupplied_info **_server_info)
212 {
213         struct auth_serversupplied_info *server_info;
214         struct netr_SamBaseInfo *base = NULL;
215         int i;
216
217         switch (validation_level) {
218         case 2:
219                 if (!validation || !validation->sam2) {
220                         return NT_STATUS_INVALID_PARAMETER;
221                 }
222                 base = &validation->sam2->base;
223                 break;
224         case 3:
225                 if (!validation || !validation->sam3) {
226                         return NT_STATUS_INVALID_PARAMETER;
227                 }
228                 base = &validation->sam3->base;
229                 break;
230         case 6:
231                 if (!validation || !validation->sam6) {
232                         return NT_STATUS_INVALID_PARAMETER;
233                 }
234                 base = &validation->sam6->base;
235                 break;
236         default:
237                 return NT_STATUS_INVALID_LEVEL;
238         }
239
240         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
241         NT_STATUS_HAVE_NO_MEMORY(server_info);
242
243         /*
244            Here is where we should check the list of
245            trusted domains, and verify that the SID 
246            matches.
247         */
248         server_info->account_sid = dom_sid_add_rid(server_info, base->domain_sid, base->rid);
249         NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid);
250
251
252         server_info->primary_group_sid = dom_sid_add_rid(server_info, base->domain_sid, base->primary_gid);
253         NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid);
254
255         server_info->n_domain_groups = base->groups.count;
256         if (base->groups.count) {
257                 server_info->domain_groups = talloc_array(server_info, struct dom_sid*, base->groups.count);
258                 NT_STATUS_HAVE_NO_MEMORY(server_info->domain_groups);
259         } else {
260                 server_info->domain_groups = NULL;
261         }
262
263         for (i = 0; i < base->groups.count; i++) {
264                 server_info->domain_groups[i] = dom_sid_add_rid(server_info, base->domain_sid, base->groups.rids[i].rid);
265                 NT_STATUS_HAVE_NO_MEMORY(server_info->domain_groups[i]);
266         }
267
268         /* Copy 'other' sids.  We need to do sid filtering here to
269            prevent possible elevation of privileges.  See:
270
271            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
272          */
273
274         if (validation_level == 3) {
275                 struct dom_sid **dgrps = server_info->domain_groups;
276                 size_t sidcount = server_info->n_domain_groups + validation->sam3->sidcount;
277                 size_t n_dgrps = server_info->n_domain_groups;
278
279                 if (validation->sam3->sidcount > 0) {
280                         dgrps = talloc_realloc(server_info, dgrps, struct dom_sid*, sidcount);
281                         NT_STATUS_HAVE_NO_MEMORY(dgrps);
282
283                         for (i = 0; i < validation->sam3->sidcount; i++) {
284                                 dgrps[n_dgrps + i] = talloc_reference(dgrps, validation->sam3->sids[i].sid);
285                         }
286                 }
287
288                 server_info->n_domain_groups = sidcount;
289                 server_info->domain_groups = dgrps;
290
291                 /* Where are the 'global' sids?... */
292         }
293
294         if (base->account_name.string) {
295                 server_info->account_name = talloc_reference(server_info, base->account_name.string);
296         } else {
297                 server_info->account_name = talloc_strdup(server_info, account_name);
298                 NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
299         }
300
301         server_info->domain_name = talloc_reference(server_info, base->domain.string);
302         server_info->full_name = talloc_reference(server_info, base->full_name.string);
303         server_info->logon_script = talloc_reference(server_info, base->logon_script.string);
304         server_info->profile_path = talloc_reference(server_info, base->profile_path.string);
305         server_info->home_directory = talloc_reference(server_info, base->home_directory.string);
306         server_info->home_drive = talloc_reference(server_info, base->home_drive.string);
307         server_info->logon_server = talloc_reference(server_info, base->logon_server.string);
308         server_info->last_logon = base->last_logon;
309         server_info->last_logoff = base->last_logoff;
310         server_info->acct_expiry = base->acct_expiry;
311         server_info->last_password_change = base->last_password_change;
312         server_info->allow_password_change = base->allow_password_change;
313         server_info->force_password_change = base->force_password_change;
314         server_info->logon_count = base->logon_count;
315         server_info->bad_password_count = base->bad_password_count;
316         server_info->acct_flags = base->acct_flags;
317
318         server_info->authenticated = true;
319
320         /* ensure we are never given NULL session keys */
321
322         if (all_zero(base->key.key, sizeof(base->key.key))) {
323                 server_info->user_session_key = data_blob(NULL, 0);
324         } else {
325                 server_info->user_session_key = data_blob_talloc(server_info, base->key.key, sizeof(base->key.key));
326                 NT_STATUS_HAVE_NO_MEMORY(server_info->user_session_key.data);
327         }
328
329         if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
330                 server_info->lm_session_key = data_blob(NULL, 0);
331         } else {
332                 server_info->lm_session_key = data_blob_talloc(server_info, base->LMSessKey.key, sizeof(base->LMSessKey.key));
333                 NT_STATUS_HAVE_NO_MEMORY(server_info->lm_session_key.data);
334         }
335
336         ZERO_STRUCT(server_info->pac_srv_sig);
337         ZERO_STRUCT(server_info->pac_kdc_sig);
338
339         *_server_info = server_info;
340         return NT_STATUS_OK;
341 }
342
343