6e160941d8684b7028eb99f73497aae0028a9f30
[gd/samba-autobuild/.git] / source4 / auth / sam.c
1 /* 
2    Unix SMB/CIFS implementation.
3    Password and authentication handling
4    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2001-2004
5    Copyright (C) Gerald Carter                             2003
6    Copyright (C) Stefan Metzmacher                         2005
7    
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 3 of the License, or
11    (at your option) any later version.
12    
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17    
18    You should have received a copy of the GNU General Public License
19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
20 */
21
22 #include "includes.h"
23 #include "system/time.h"
24 #include "auth/auth.h"
25 #include "db_wrap.h"
26 #include "dsdb/samdb/samdb.h"
27 #include "libcli/security/security.h"
28 #include "libcli/ldap/ldap.h"
29 #include "librpc/gen_ndr/ndr_netlogon.h"
30
31 const char *user_attrs[] = {
32         /* required for the krb5 kdc */
33         "objectClass",
34         "sAMAccountName",
35         "userPrincipalName",
36         "servicePrincipalName",
37         "msDS-KeyVersionNumber",
38         "supplementalCredentials",
39
40         /* passwords */
41         "dBCSPwd", 
42         "unicodePwd",
43
44         "userAccountControl",
45
46         "pwdLastSet",
47         "accountExpires",
48         "logonHours",
49         "objectSid",
50
51         /* check 'allowed workstations' */
52         "userWorkstations",
53                        
54         /* required for server_info, not access control: */
55         "displayName",
56         "scriptPath",
57         "profilePath",
58         "homeDirectory",
59         "homeDrive",
60         "lastLogon",
61         "lastLogoff",
62         "accountExpires",
63         "badPwdCount",
64         "logonCount",
65         "primaryGroupID",
66         NULL,
67 };
68
69 const char *domain_ref_attrs[] =  {"nETBIOSName", "nCName", 
70                                    "dnsRoot", "objectClass", NULL};
71
72 /****************************************************************************
73  Check if a user is allowed to logon at this time. Note this is the
74  servers local time, as logon hours are just specified as a weekly
75  bitmask.
76 ****************************************************************************/
77                                                                                                               
78 static BOOL logon_hours_ok(struct ldb_message *msg, const char *name_for_logs)
79 {
80         /* In logon hours first bit is Sunday from 12AM to 1AM */
81         const struct ldb_val *hours;
82         struct tm *utctime;
83         time_t lasttime;
84         const char *asct;
85         uint8_t bitmask, bitpos;
86
87         hours = ldb_msg_find_ldb_val(msg, "logonHours");
88         if (!hours) {
89                 DEBUG(5,("logon_hours_ok: No hours restrictions for user %s\n", name_for_logs));
90                 return True;
91         }
92
93         if (hours->length != 168/8) {
94                 DEBUG(5,("logon_hours_ok: malformed logon hours restrictions for user %s\n", name_for_logs));
95                 return True;            
96         }
97
98         lasttime = time(NULL);
99         utctime = gmtime(&lasttime);
100         if (!utctime) {
101                 DEBUG(1, ("logon_hours_ok: failed to get gmtime. Failing logon for user %s\n",
102                         name_for_logs));
103                 return False;
104         }
105
106         /* find the corresponding byte and bit */
107         bitpos = (utctime->tm_wday * 24 + utctime->tm_hour) % 168;
108         bitmask = 1 << (bitpos % 8);
109
110         if (! (hours->data[bitpos/8] & bitmask)) {
111                 struct tm *t = localtime(&lasttime);
112                 if (!t) {
113                         asct = "INVALID TIME";
114                 } else {
115                         asct = asctime(t);
116                         if (!asct) {
117                                 asct = "INVALID TIME";
118                         }
119                 }
120                 
121                 DEBUG(1, ("logon_hours_ok: Account for user %s not allowed to "
122                           "logon at this time (%s).\n",
123                           name_for_logs, asct ));
124                 return False;
125         }
126
127         asct = asctime(utctime);
128         DEBUG(5,("logon_hours_ok: user %s allowed to logon at this time (%s)\n",
129                 name_for_logs, asct ? asct : "UNKNOWN TIME" ));
130
131         return True;
132 }
133
134 /****************************************************************************
135  Do a specific test for a SAM_ACCOUNT being vaild for this connection 
136  (ie not disabled, expired and the like).
137 ****************************************************************************/
138 _PUBLIC_ NTSTATUS authsam_account_ok(TALLOC_CTX *mem_ctx,
139                             struct ldb_context *sam_ctx,
140                             uint32_t logon_parameters,
141                             struct ldb_message *msg,
142                             struct ldb_message *msg_domain_ref,
143                             const char *logon_workstation,
144                             const char *name_for_logs)
145 {
146         uint16_t acct_flags;
147         const char *workstation_list;
148         NTTIME acct_expiry;
149         NTTIME must_change_time;
150         NTTIME last_set_time;
151
152         struct ldb_dn *domain_dn = samdb_result_dn(sam_ctx, mem_ctx, msg_domain_ref, "nCName", ldb_dn_new(mem_ctx, sam_ctx, NULL));
153
154         NTTIME now;
155         DEBUG(4,("authsam_account_ok: Checking SMB password for user %s\n", name_for_logs));
156
157         acct_flags = samdb_result_acct_flags(msg, "userAccountControl");
158         
159         acct_expiry = samdb_result_nttime(msg, "accountExpires", 0);
160         must_change_time = samdb_result_force_password_change(sam_ctx, mem_ctx, 
161                                                               domain_dn, msg);
162         last_set_time = samdb_result_nttime(msg, "pwdLastSet", 0);
163
164         workstation_list = samdb_result_string(msg, "userWorkstations", NULL);
165
166         /* Quit if the account was disabled. */
167         if (acct_flags & ACB_DISABLED) {
168                 DEBUG(1,("authsam_account_ok: Account for user '%s' was disabled.\n", name_for_logs));
169                 return NT_STATUS_ACCOUNT_DISABLED;
170         }
171
172         /* Quit if the account was locked out. */
173         if (acct_flags & ACB_AUTOLOCK) {
174                 DEBUG(1,("authsam_account_ok: Account for user %s was locked out.\n", name_for_logs));
175                 return NT_STATUS_ACCOUNT_LOCKED_OUT;
176         }
177
178         /* Test account expire time */
179         unix_to_nt_time(&now, time(NULL));
180         if (now > acct_expiry) {
181                 DEBUG(1,("authsam_account_ok: Account for user '%s' has expired.\n", name_for_logs));
182                 DEBUG(3,("authsam_account_ok: Account expired at '%s'.\n", 
183                          nt_time_string(mem_ctx, acct_expiry)));
184                 return NT_STATUS_ACCOUNT_EXPIRED;
185         }
186
187         if (!(acct_flags & ACB_PWNOEXP)) {
188                 /* check for immediate expiry "must change at next logon" */
189                 if (must_change_time == 0 && last_set_time != 0) {
190                         DEBUG(1,("sam_account_ok: Account for user '%s' password must change!.\n", 
191                                  name_for_logs));
192                         return NT_STATUS_PASSWORD_MUST_CHANGE;
193                 }
194
195                 /* check for expired password */
196                 if ((must_change_time != 0) && (must_change_time < now)) {
197                         DEBUG(1,("sam_account_ok: Account for user '%s' password expired!.\n", 
198                                  name_for_logs));
199                         DEBUG(1,("sam_account_ok: Password expired at '%s' unix time.\n", 
200                                  nt_time_string(mem_ctx, must_change_time)));
201                         return NT_STATUS_PASSWORD_EXPIRED;
202                 }
203         }
204
205         /* Test workstation. Workstation list is comma separated. */
206         if (logon_workstation && workstation_list && *workstation_list) {
207                 BOOL invalid_ws = True;
208                 int i;
209                 const char **workstations = str_list_make(mem_ctx, workstation_list, ",");
210                 
211                 for (i = 0; workstations && workstations[i]; i++) {
212                         DEBUG(10,("sam_account_ok: checking for workstation match '%s' and '%s'\n",
213                                   workstations[i], logon_workstation));
214
215                         if (strequal(workstations[i], logon_workstation)) {
216                                 invalid_ws = False;
217                                 break;
218                         }
219                 }
220
221                 talloc_free(workstations);
222
223                 if (invalid_ws) {
224                         return NT_STATUS_INVALID_WORKSTATION;
225                 }
226         }
227         
228         if (!logon_hours_ok(msg, name_for_logs)) {
229                 return NT_STATUS_INVALID_LOGON_HOURS;
230         }
231         
232         if (acct_flags & ACB_DOMTRUST) {
233                 DEBUG(2,("sam_account_ok: Domain trust account %s denied by server\n", name_for_logs));
234                 return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
235         }
236         
237         if (!(logon_parameters & MSV1_0_ALLOW_SERVER_TRUST_ACCOUNT)) {
238                 if (acct_flags & ACB_SVRTRUST) {
239                         DEBUG(2,("sam_account_ok: Server trust account %s denied by server\n", name_for_logs));
240                         return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
241                 }
242         }
243         if (!(logon_parameters & MSV1_0_ALLOW_WORKSTATION_TRUST_ACCOUNT)) {
244                 if (acct_flags & ACB_WSTRUST) {
245                         DEBUG(4,("sam_account_ok: Wksta trust account %s denied by server\n", name_for_logs));
246                         return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
247                 }
248         }
249
250         return NT_STATUS_OK;
251 }
252
253 _PUBLIC_ NTSTATUS authsam_make_server_info(TALLOC_CTX *mem_ctx, struct ldb_context *sam_ctx,
254                                   struct ldb_message *msg,
255                                   struct ldb_message *msg_domain_ref,
256                                   DATA_BLOB user_sess_key, DATA_BLOB lm_sess_key,
257                                   struct auth_serversupplied_info **_server_info)
258 {
259         struct auth_serversupplied_info *server_info;
260         struct ldb_message **group_msgs;
261         int group_ret;
262         const char *group_attrs[3] = { "sAMAccountType", "objectSid", NULL }; 
263         /* find list of sids */
264         struct dom_sid **groupSIDs = NULL;
265         struct dom_sid *account_sid;
266         struct dom_sid *primary_group_sid;
267         const char *str;
268         struct ldb_dn *ncname;
269         int i;
270         uint_t rid;
271         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
272
273         group_ret = gendb_search(sam_ctx,
274                                  tmp_ctx, NULL, &group_msgs, group_attrs,
275                                  "(&(member=%s)(sAMAccountType=*))", 
276                                  ldb_dn_get_linearized(msg->dn));
277         if (group_ret == -1) {
278                 talloc_free(tmp_ctx);
279                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
280         }
281
282         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
283         NT_STATUS_HAVE_NO_MEMORY(server_info);
284         
285         if (group_ret > 0) {
286                 groupSIDs = talloc_array(server_info, struct dom_sid *, group_ret);
287                 NT_STATUS_HAVE_NO_MEMORY(groupSIDs);
288         }
289
290         /* Need to unroll some nested groups, but not aliases */
291         for (i = 0; i < group_ret; i++) {
292                 groupSIDs[i] = samdb_result_dom_sid(groupSIDs, 
293                                                     group_msgs[i], "objectSid");
294                 NT_STATUS_HAVE_NO_MEMORY(groupSIDs[i]);
295         }
296
297         talloc_free(tmp_ctx);
298
299         account_sid = samdb_result_dom_sid(server_info, msg, "objectSid");
300         NT_STATUS_HAVE_NO_MEMORY(account_sid);
301
302         primary_group_sid = dom_sid_dup(server_info, account_sid);
303         NT_STATUS_HAVE_NO_MEMORY(primary_group_sid);
304
305         rid = samdb_result_uint(msg, "primaryGroupID", ~0);
306         if (rid == ~0) {
307                 if (group_ret > 0) {
308                         primary_group_sid = groupSIDs[0];
309                 } else {
310                         primary_group_sid = NULL;
311                 }
312         } else {
313                 primary_group_sid->sub_auths[primary_group_sid->num_auths-1] = rid;
314         }
315
316         server_info->account_sid = account_sid;
317         server_info->primary_group_sid = primary_group_sid;
318         
319         server_info->n_domain_groups = group_ret;
320         server_info->domain_groups = groupSIDs;
321
322         server_info->account_name = talloc_steal(server_info, samdb_result_string(msg, "sAMAccountName", NULL));
323
324         server_info->domain_name = talloc_steal(server_info, samdb_result_string(msg_domain_ref, "nETBIOSName", NULL));
325
326         str = samdb_result_string(msg, "displayName", "");
327         server_info->full_name = talloc_strdup(server_info, str);
328         NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
329
330         str = samdb_result_string(msg, "scriptPath", "");
331         server_info->logon_script = talloc_strdup(server_info, str);
332         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
333
334         str = samdb_result_string(msg, "profilePath", "");
335         server_info->profile_path = talloc_strdup(server_info, str);
336         NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
337
338         str = samdb_result_string(msg, "homeDirectory", "");
339         server_info->home_directory = talloc_strdup(server_info, str);
340         NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
341
342         str = samdb_result_string(msg, "homeDrive", "");
343         server_info->home_drive = talloc_strdup(server_info, str);
344         NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
345
346         server_info->logon_server = talloc_strdup(server_info, lp_netbios_name());
347         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_server);
348
349         server_info->last_logon = samdb_result_nttime(msg, "lastLogon", 0);
350         server_info->last_logoff = samdb_result_nttime(msg, "lastLogoff", 0);
351         server_info->acct_expiry = samdb_result_nttime(msg, "accountExpires", 0);
352         server_info->last_password_change = samdb_result_nttime(msg, "pwdLastSet", 0);
353
354         ncname = samdb_result_dn(sam_ctx, mem_ctx, msg_domain_ref, "nCName", NULL);
355         if (!ncname) {
356                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
357         }
358         server_info->allow_password_change
359                 = samdb_result_allow_password_change(sam_ctx, mem_ctx, 
360                                                      ncname, msg, "pwdLastSet");
361         server_info->force_password_change
362                 = samdb_result_force_password_change(sam_ctx, mem_ctx, 
363                                                      ncname, msg);
364         
365         server_info->logon_count = samdb_result_uint(msg, "logonCount", 0);
366         server_info->bad_password_count = samdb_result_uint(msg, "badPwdCount", 0);
367
368         server_info->acct_flags = samdb_result_acct_flags(msg, "userAccountControl");
369
370         server_info->user_session_key = user_sess_key;
371         server_info->lm_session_key = lm_sess_key;
372
373         server_info->authenticated = True;
374
375         *_server_info = server_info;
376
377         return NT_STATUS_OK;
378 }
379
380 _PUBLIC_ NTSTATUS sam_get_results_principal(struct ldb_context *sam_ctx,
381                                    TALLOC_CTX *mem_ctx, const char *principal,
382                                    struct ldb_message ***msgs,
383                                    struct ldb_message ***msgs_domain_ref)
384 {                          
385         struct ldb_dn *user_dn, *domain_dn;
386         NTSTATUS nt_status;
387         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
388         int ret;
389         struct ldb_dn *partitions_basedn = samdb_partitions_dn(sam_ctx, mem_ctx);
390
391         if (!tmp_ctx) {
392                 return NT_STATUS_NO_MEMORY;
393         }
394
395         nt_status = crack_user_principal_name(sam_ctx, tmp_ctx, principal, &user_dn, &domain_dn);
396         if (!NT_STATUS_IS_OK(nt_status)) {
397                 talloc_free(tmp_ctx);
398                 return nt_status;
399         }
400         
401         /* grab domain info from the reference */
402         ret = gendb_search(sam_ctx, tmp_ctx, partitions_basedn, msgs_domain_ref, domain_ref_attrs,
403                            "(ncName=%s)", ldb_dn_get_linearized(domain_dn));
404
405         if (ret != 1) {
406                 talloc_free(tmp_ctx);
407                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
408         }
409         
410         /* pull the user attributes */
411         ret = gendb_search_dn(sam_ctx, tmp_ctx, user_dn, msgs, user_attrs);
412         if (ret != 1) {
413                 talloc_free(tmp_ctx);
414                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
415         }
416         talloc_steal(mem_ctx, *msgs);
417         talloc_steal(mem_ctx, *msgs_domain_ref);
418         talloc_free(tmp_ctx);
419         
420         return NT_STATUS_OK;
421 }
422                                    
423 /* Used in the gensec_gssapi and gensec_krb5 server-side code, where the PAC isn't available */
424 NTSTATUS sam_get_server_info_principal(TALLOC_CTX *mem_ctx, const char *principal,
425                                        struct auth_serversupplied_info **server_info)
426 {
427         NTSTATUS nt_status;
428         DATA_BLOB user_sess_key = data_blob(NULL, 0);
429         DATA_BLOB lm_sess_key = data_blob(NULL, 0);
430
431         struct ldb_message **msgs;
432         struct ldb_message **msgs_domain_ref;
433         struct ldb_context *sam_ctx;
434
435         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
436         if (!tmp_ctx) {
437                 return NT_STATUS_NO_MEMORY;
438         }
439
440         sam_ctx = samdb_connect(tmp_ctx, system_session(tmp_ctx));
441         if (sam_ctx == NULL) {
442                 talloc_free(tmp_ctx);
443                 return NT_STATUS_INVALID_SYSTEM_SERVICE;
444         }
445
446         nt_status = sam_get_results_principal(sam_ctx, tmp_ctx, principal, 
447                                               &msgs, &msgs_domain_ref);
448         if (!NT_STATUS_IS_OK(nt_status)) {
449                 return nt_status;
450         }
451
452         nt_status = authsam_make_server_info(tmp_ctx, sam_ctx, msgs[0], msgs_domain_ref[0],
453                                              user_sess_key, lm_sess_key,
454                                              server_info);
455         if (NT_STATUS_IS_OK(nt_status)) {
456                 talloc_steal(mem_ctx, *server_info);
457         }
458         talloc_free(tmp_ctx);
459         return nt_status;
460 }