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