import HEAD into svn+ssh://svn.samba.org/home/svn/samba/trunk
[metze/old/v3-2-winbind-ndr.git] / source / auth / auth_util.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
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 2 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, write to the Free Software
21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24 #include "includes.h"
25
26 #undef DBGC_CLASS
27 #define DBGC_CLASS DBGC_AUTH
28
29 extern DOM_SID global_sid_World;
30 extern DOM_SID global_sid_Network;
31 extern DOM_SID global_sid_Builtin_Guests;
32 extern DOM_SID global_sid_Authenticated_Users;
33
34
35 /****************************************************************************
36  Create a UNIX user on demand.
37 ****************************************************************************/
38
39 static int smb_create_user(const char *domain, const char *unix_username, const char *homedir)
40 {
41         pstring add_script;
42         int ret;
43
44         pstrcpy(add_script, lp_adduser_script());
45         if (! *add_script)
46                 return -1;
47         all_string_sub(add_script, "%u", unix_username, sizeof(pstring));
48         if (domain)
49                 all_string_sub(add_script, "%D", domain, sizeof(pstring));
50         if (homedir)
51                 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
52         ret = smbrun(add_script,NULL);
53         DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
54         return ret;
55 }
56
57 /****************************************************************************
58  Add and Delete UNIX users on demand, based on NTSTATUS codes.
59  We don't care about RID's here so ignore.
60 ****************************************************************************/
61
62 void auth_add_user_script(const char *domain, const char *username)
63 {
64         uint32 rid;
65         /*
66          * User validated ok against Domain controller.
67          * If the admin wants us to try and create a UNIX
68          * user on the fly, do so.
69          */
70         
71         if ( *lp_adduser_script() )
72                 smb_create_user(domain, username, NULL);
73         else {
74                 DEBUG(10,("auth_add_user_script: no 'add user script'.  Asking winbindd\n"));
75                 
76                 /* should never get here is we a re a domain member running winbindd
77                    However, a host set for 'security = server' might run winbindd for 
78                    account allocation */
79                    
80                 if ( !winbind_create_user(username, NULL) ) {
81                         DEBUG(5,("auth_add_user_script: winbindd_create_user() failed\n"));
82                         rid = 0;
83                 }
84         }
85 }
86
87 /****************************************************************************
88  Create a SAM_ACCOUNT - either by looking in the pdb, or by faking it up from
89  unix info.
90 ****************************************************************************/
91
92 NTSTATUS auth_get_sam_account(const char *user, SAM_ACCOUNT **account) 
93 {
94         BOOL pdb_ret;
95         NTSTATUS nt_status;
96         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(account))) {
97                 return nt_status;
98         }
99         
100         become_root();
101         pdb_ret = pdb_getsampwnam(*account, user);
102         unbecome_root();
103
104         if (!pdb_ret) {
105                 
106                 struct passwd *pass = Get_Pwnam(user);
107                 if (!pass) 
108                         return NT_STATUS_NO_SUCH_USER;
109
110                 if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*account, pass))) {
111                         return nt_status;
112                 }
113         }
114         return NT_STATUS_OK;
115 }
116
117 /****************************************************************************
118  Create an auth_usersupplied_data structure
119 ****************************************************************************/
120
121 static NTSTATUS make_user_info(auth_usersupplied_info **user_info, 
122                                const char *smb_name, 
123                                const char *internal_username,
124                                const char *client_domain, 
125                                const char *domain,
126                                const char *wksta_name, 
127                                DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
128                                DATA_BLOB plaintext, 
129                                uint32 auth_flags, BOOL encrypted)
130 {
131
132         DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
133
134         *user_info = malloc(sizeof(**user_info));
135         if (!user_info) {
136                 DEBUG(0,("malloc failed for user_info (size %lu)\n", (unsigned long)sizeof(*user_info)));
137                 return NT_STATUS_NO_MEMORY;
138         }
139
140         ZERO_STRUCTP(*user_info);
141
142         DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
143
144         (*user_info)->smb_name.str = strdup(smb_name);
145         if ((*user_info)->smb_name.str) { 
146                 (*user_info)->smb_name.len = strlen(smb_name);
147         } else {
148                 free_user_info(user_info);
149                 return NT_STATUS_NO_MEMORY;
150         }
151         
152         (*user_info)->internal_username.str = strdup(internal_username);
153         if ((*user_info)->internal_username.str) { 
154                 (*user_info)->internal_username.len = strlen(internal_username);
155         } else {
156                 free_user_info(user_info);
157                 return NT_STATUS_NO_MEMORY;
158         }
159
160         (*user_info)->domain.str = strdup(domain);
161         if ((*user_info)->domain.str) { 
162                 (*user_info)->domain.len = strlen(domain);
163         } else {
164                 free_user_info(user_info);
165                 return NT_STATUS_NO_MEMORY;
166         }
167
168         (*user_info)->client_domain.str = strdup(client_domain);
169         if ((*user_info)->client_domain.str) { 
170                 (*user_info)->client_domain.len = strlen(client_domain);
171         } else {
172                 free_user_info(user_info);
173                 return NT_STATUS_NO_MEMORY;
174         }
175
176         (*user_info)->wksta_name.str = strdup(wksta_name);
177         if ((*user_info)->wksta_name.str) { 
178                 (*user_info)->wksta_name.len = strlen(wksta_name);
179         } else {
180                 free_user_info(user_info);
181                 return NT_STATUS_NO_MEMORY;
182         }
183
184         DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
185
186         (*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length);
187         (*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length);
188         (*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length);
189
190         (*user_info)->encrypted = encrypted;
191         (*user_info)->auth_flags = auth_flags;
192
193         DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
194
195         return NT_STATUS_OK;
196 }
197
198 /****************************************************************************
199  Create an auth_usersupplied_data structure after appropriate mapping.
200 ****************************************************************************/
201
202 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info, 
203                             const char *smb_name, 
204                             const char *client_domain, 
205                             const char *wksta_name, 
206                             DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
207                             DATA_BLOB plaintext, 
208                             uint32 ntlmssp_flags, BOOL encrypted)
209 {
210         const char *domain;
211         fstring internal_username;
212         fstrcpy(internal_username, smb_name);
213         map_username(internal_username); 
214         
215         DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
216               client_domain, smb_name, wksta_name));
217         
218         /* don't allow "" as a domain, fixes a Win9X bug 
219            where it doens't supply a domain for logon script
220            'net use' commands.                                 */
221
222         if ( *client_domain )
223                 domain = client_domain;
224         else
225                 domain = lp_workgroup();
226
227         /* do what win2k does.  Always map unknown domains to our own
228            and let the "passdb backend" handle unknown users. */
229
230         if ( !is_trusted_domain(domain) && !strequal(domain, get_global_sam_name()) ) 
231                 domain = get_default_sam_name();
232         
233         /* we know that it is a trusted domain (and we are allowing them) or it is our domain */
234         
235         return make_user_info(user_info, smb_name, internal_username, 
236                 client_domain, domain, wksta_name, lm_pwd, nt_pwd,
237                 plaintext, ntlmssp_flags, encrypted);
238 }
239
240 /****************************************************************************
241  Create an auth_usersupplied_data, making the DATA_BLOBs here. 
242  Decrypt and encrypt the passwords.
243 ****************************************************************************/
244
245 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info, 
246                                      const char *smb_name, 
247                                      const char *client_domain, 
248                                      const char *wksta_name, 
249                                      const uchar *lm_network_pwd, int lm_pwd_len,
250                                      const uchar *nt_network_pwd, int nt_pwd_len)
251 {
252         BOOL ret;
253         NTSTATUS nt_status;
254         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
255         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
256         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
257         uint32 auth_flags = AUTH_FLAG_NONE;
258
259         if (lm_pwd_len)
260                 auth_flags |= AUTH_FLAG_LM_RESP;
261         if (nt_pwd_len == 24) {
262                 auth_flags |= AUTH_FLAG_NTLM_RESP; 
263         } else if (nt_pwd_len != 0) {
264                 auth_flags |= AUTH_FLAG_NTLMv2_RESP; 
265         }
266
267         nt_status = make_user_info_map(user_info,
268                                       smb_name, client_domain, 
269                                   wksta_name, 
270                                       lm_blob, nt_blob,
271                                       plaintext_blob, 
272                                       auth_flags, True);
273         
274         ret = NT_STATUS_IS_OK(nt_status) ? True : False;
275                 
276         data_blob_free(&lm_blob);
277         data_blob_free(&nt_blob);
278         return ret;
279 }
280
281 /****************************************************************************
282  Create an auth_usersupplied_data, making the DATA_BLOBs here. 
283  Decrypt and encrypt the passwords.
284 ****************************************************************************/
285
286 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info, 
287                                          const char *smb_name, 
288                                          const char *client_domain, 
289                                          const char *wksta_name, 
290                                          const uchar chal[8], 
291                                          const uchar lm_interactive_pwd[16], 
292                                          const uchar nt_interactive_pwd[16], 
293                                          const uchar *dc_sess_key)
294 {
295         char lm_pwd[16];
296         char nt_pwd[16];
297         unsigned char local_lm_response[24];
298         unsigned char local_nt_response[24];
299         unsigned char key[16];
300         uint32 auth_flags = AUTH_FLAG_NONE;
301         
302         ZERO_STRUCT(key);
303         memcpy(key, dc_sess_key, 8);
304         
305         if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
306         if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
307         
308 #ifdef DEBUG_PASSWORD
309         DEBUG(100,("key:"));
310         dump_data(100, (char *)key, sizeof(key));
311         
312         DEBUG(100,("lm owf password:"));
313         dump_data(100, lm_pwd, sizeof(lm_pwd));
314         
315         DEBUG(100,("nt owf password:"));
316         dump_data(100, nt_pwd, sizeof(nt_pwd));
317 #endif
318         
319         SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
320         SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
321         
322 #ifdef DEBUG_PASSWORD
323         DEBUG(100,("decrypt of lm owf password:"));
324         dump_data(100, lm_pwd, sizeof(lm_pwd));
325         
326         DEBUG(100,("decrypt of nt owf password:"));
327         dump_data(100, nt_pwd, sizeof(nt_pwd));
328 #endif
329         
330         SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
331         SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
332         
333         /* Password info paranoia */
334         ZERO_STRUCT(lm_pwd);
335         ZERO_STRUCT(nt_pwd);
336         ZERO_STRUCT(key);
337
338         {
339                 BOOL ret;
340                 NTSTATUS nt_status;
341                 DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
342                 DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
343                 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
344
345                 if (lm_interactive_pwd)
346                         auth_flags |= AUTH_FLAG_LM_RESP;
347                 if (nt_interactive_pwd)
348                         auth_flags |= AUTH_FLAG_NTLM_RESP; 
349
350                 nt_status = make_user_info_map(user_info, 
351                                                smb_name, client_domain, 
352                                                wksta_name, 
353                                                local_lm_blob,
354                                                local_nt_blob,
355                                                plaintext_blob, 
356                                                auth_flags, True);
357                 
358                 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
359                 data_blob_free(&local_lm_blob);
360                 data_blob_free(&local_nt_blob);
361                 return ret;
362         }
363 }
364
365
366 /****************************************************************************
367  Create an auth_usersupplied_data structure
368 ****************************************************************************/
369
370 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info, 
371                               const char *smb_name, 
372                               const char *client_domain,
373                               const uint8 chal[8],
374                               DATA_BLOB plaintext_password)
375 {
376
377         DATA_BLOB local_lm_blob;
378         DATA_BLOB local_nt_blob;
379         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
380         uint32 auth_flags = AUTH_FLAG_NONE;
381                         
382         /*
383          * Not encrypted - do so.
384          */
385         
386         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n"));
387         
388         if (plaintext_password.data) {
389                 unsigned char local_lm_response[24];
390                 
391 #ifdef DEBUG_PASSWORD
392                 DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length));
393                 dump_data(100, plaintext_password.data, plaintext_password.length);
394 #endif
395
396                 SMBencrypt( (const char *)plaintext_password.data, (const uchar*)chal, local_lm_response);
397                 local_lm_blob = data_blob(local_lm_response, 24);
398                 
399                 /* We can't do an NT hash here, as the password needs to be
400                    case insensitive */
401                 local_nt_blob = data_blob(NULL, 0); 
402                 
403                 auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP);
404         } else {
405                 local_lm_blob = data_blob(NULL, 0); 
406                 local_nt_blob = data_blob(NULL, 0); 
407         }
408         
409         ret = make_user_info_map(user_info, smb_name,
410                                  client_domain, 
411                                  get_remote_machine_name(),
412                                  local_lm_blob,
413                                  local_nt_blob,
414                                  plaintext_password, 
415                                  auth_flags, False);
416         
417         data_blob_free(&local_lm_blob);
418         return NT_STATUS_IS_OK(ret) ? True : False;
419 }
420
421 /****************************************************************************
422  Create an auth_usersupplied_data structure
423 ****************************************************************************/
424
425 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info, 
426                                       const char *smb_name,
427                                       const char *client_domain, 
428                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
429 {
430         uint32 auth_flags = AUTH_FLAG_NONE;
431
432         DATA_BLOB no_plaintext_blob = data_blob(NULL, 0); 
433         
434         if (lm_resp.length == 24) {
435                 auth_flags |= AUTH_FLAG_LM_RESP;
436         }
437         if (nt_resp.length == 0) {
438         } else if (nt_resp.length == 24) {
439                 auth_flags |= AUTH_FLAG_NTLM_RESP;
440         } else {
441                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
442         }
443
444         return make_user_info_map(user_info, smb_name, 
445                                  client_domain, 
446                                  get_remote_machine_name(), 
447                                  lm_resp, 
448                                  nt_resp, 
449                                  no_plaintext_blob, 
450                                  auth_flags, True);
451 }
452
453 /****************************************************************************
454  Create a guest user_info blob, for anonymous authenticaion.
455 ****************************************************************************/
456
457 BOOL make_user_info_guest(auth_usersupplied_info **user_info) 
458 {
459         DATA_BLOB lm_blob = data_blob(NULL, 0);
460         DATA_BLOB nt_blob = data_blob(NULL, 0);
461         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
462         uint32 auth_flags = AUTH_FLAG_NONE;
463         NTSTATUS nt_status;
464
465         nt_status = make_user_info(user_info, 
466                               "","", 
467                               "","", 
468                               "", 
469                               nt_blob, lm_blob,
470                               plaintext_blob, 
471                               auth_flags, True);
472                               
473         return NT_STATUS_IS_OK(nt_status) ? True : False;
474 }
475
476 /****************************************************************************
477  prints a NT_USER_TOKEN to debug output.
478 ****************************************************************************/
479
480 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
481 {
482         fstring sid_str;
483         size_t     i;
484         
485         if (!token) {
486                 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
487                 return;
488         }
489         
490         DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n",
491                                     sid_to_string(sid_str, &token->user_sids[0]) ));
492         DEBUGADDC(dbg_class, dbg_lev, ("contains %lu SIDs\n", (unsigned long)token->num_sids));
493         for (i = 0; i < token->num_sids; i++)
494                 DEBUGADDC(dbg_class, dbg_lev, ("SID[%3lu]: %s\n", (unsigned long)i, 
495                                                sid_to_string(sid_str, &token->user_sids[i])));
496 }
497
498 /****************************************************************************
499  prints a UNIX 'token' to debug output.
500 ****************************************************************************/
501
502 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid, int n_groups, gid_t *groups)
503 {
504         int     i;
505         DEBUGC(dbg_class, dbg_lev, ("UNIX token of user %ld\n", (long int)uid));
506
507         DEBUGADDC(dbg_class, dbg_lev, ("Primary group is %ld and contains %i supplementary groups\n", (long int)gid, n_groups));
508         for (i = 0; i < n_groups; i++)
509                 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i, 
510                         (long int)groups[i]));
511 }
512
513 /****************************************************************************
514  Create the SID list for this user.
515 ****************************************************************************/
516
517 static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid, 
518                                      int n_groupSIDs, DOM_SID *groupSIDs, 
519                                      BOOL is_guest, NT_USER_TOKEN **token)
520 {
521         NTSTATUS       nt_status = NT_STATUS_OK;
522         NT_USER_TOKEN *ptoken;
523         int i;
524         int sid_ndx;
525         
526         if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
527                 DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
528                 nt_status = NT_STATUS_NO_MEMORY;
529                 return nt_status;
530         }
531
532         ZERO_STRUCTP(ptoken);
533
534         ptoken->num_sids = n_groupSIDs + 5;
535
536         if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
537                 DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
538                 nt_status = NT_STATUS_NO_MEMORY;
539                 return nt_status;
540         }
541         
542         memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
543         
544         /*
545          * Note - user SID *MUST* be first in token !
546          * se_access_check depends on this.
547          *
548          * Primary group SID is second in token. Convention.
549          */
550
551         sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
552         if (group_sid)
553                 sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
554
555         /*
556          * Finally add the "standard" SIDs.
557          * The only difference between guest and "anonymous" (which we
558          * don't really support) is the addition of Authenticated_Users.
559          */
560
561         sid_copy(&ptoken->user_sids[2], &global_sid_World);
562         sid_copy(&ptoken->user_sids[3], &global_sid_Network);
563
564         if (is_guest)
565                 sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
566         else
567                 sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
568         
569         sid_ndx = 5; /* next available spot */
570
571         for (i = 0; i < n_groupSIDs; i++) {
572                 size_t check_sid_idx;
573                 for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
574                         if (sid_equal(&ptoken->user_sids[check_sid_idx], 
575                                       &groupSIDs[i])) {
576                                 break;
577                         }
578                 }
579                 
580                 if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
581                         sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
582                 } else {
583                         ptoken->num_sids--;
584                 }
585         }
586         
587         debug_nt_user_token(DBGC_AUTH, 10, ptoken);
588         
589         *token = ptoken;
590
591         return nt_status;
592 }
593
594 /****************************************************************************
595  Create the SID list for this user.
596 ****************************************************************************/
597
598 NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
599 {
600         DOM_SID user_sid;
601         DOM_SID group_sid;
602         DOM_SID *group_sids;
603         NT_USER_TOKEN *token;
604         int i;
605
606         if (!NT_STATUS_IS_OK(uid_to_sid(&user_sid, uid))) {
607                 return NULL;
608         }
609         if (!NT_STATUS_IS_OK(gid_to_sid(&group_sid, gid))) {
610                 return NULL;
611         }
612
613         group_sids = malloc(sizeof(DOM_SID) * ngroups);
614         if (!group_sids) {
615                 DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
616                 return NULL;
617         }
618
619         for (i = 0; i < ngroups; i++) {
620                 if (!NT_STATUS_IS_OK(gid_to_sid(&(group_sids)[i], (groups)[i]))) {
621                         DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
622                         SAFE_FREE(group_sids);
623                         return NULL;
624                 }
625         }
626
627         if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid, 
628                                                   ngroups, group_sids, is_guest, &token))) {
629                 SAFE_FREE(group_sids);
630                 return NULL;
631         }
632
633         SAFE_FREE(group_sids);
634
635         return token;
636 }
637
638 /******************************************************************************
639  * this function returns the groups (SIDs) of the local SAM the user is in.
640  * If this samba server is a DC of the domain the user belongs to, it returns 
641  * both domain groups and local / builtin groups. If the user is in a trusted
642  * domain, or samba is a member server of a domain, then this function returns
643  * local and builtin groups the user is a member of.
644  *
645  * currently this is a hack, as there is no sam implementation that is capable
646  * of groups.
647  *
648  * NOTE!! This function will fail if you pass in a winbind user without 
649  * the domain   --jerry
650  ******************************************************************************/
651
652 static NTSTATUS get_user_groups(const char *username, uid_t uid, gid_t gid,
653                                 int *n_groups, DOM_SID **groups, gid_t **unix_groups)
654 {
655         int             n_unix_groups;
656         int             i;
657
658         *n_groups = 0;
659         *groups   = NULL;
660         
661         /* Try winbind first */
662
663         if ( strchr(username, *lp_winbind_separator()) ) {
664                 n_unix_groups = winbind_getgroups( username, unix_groups );
665
666                 DEBUG(10,("get_user_groups: winbind_getgroups(%s): result = %s\n", username, 
667                           n_unix_groups == -1 ? "FAIL" : "SUCCESS"));
668                           
669                 if ( n_unix_groups == -1 )
670                         return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */  
671         }
672         else {
673                 /* fallback to getgrouplist() */
674                 
675                 n_unix_groups = groups_max();
676                 
677                 if ((*unix_groups = malloc( sizeof(gid_t) * n_unix_groups ) ) == NULL) {
678                         DEBUG(0, ("get_user_groups: Out of memory allocating unix group list\n"));
679                         return NT_STATUS_NO_MEMORY;
680                 }
681         
682                 if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) {
683                 
684                         gid_t *groups_tmp;
685                         
686                         groups_tmp = Realloc(*unix_groups, sizeof(gid_t) * n_unix_groups);
687                         
688                         if (!groups_tmp) {
689                                 SAFE_FREE(*unix_groups);
690                                 return NT_STATUS_NO_MEMORY;
691                         }
692                         *unix_groups = groups_tmp;
693
694                         if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) {
695                                 DEBUG(0, ("get_user_groups: failed to get the unix group list\n"));
696                                 SAFE_FREE(*unix_groups);
697                                 return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
698                         }
699                 }
700         }
701
702         debug_unix_user_token(DBGC_CLASS, 5, uid, gid, n_unix_groups, *unix_groups);
703         
704         /* now setup the space for storing the SIDS */
705         
706         if (n_unix_groups > 0) {
707         
708                 *groups   = malloc(sizeof(DOM_SID) * n_unix_groups);
709                 
710                 if (!*groups) {
711                         DEBUG(0, ("get_user_group: malloc() failed for DOM_SID list!\n"));
712                         SAFE_FREE(*unix_groups);
713                         return NT_STATUS_NO_MEMORY;
714                 }
715         }
716
717         *n_groups = n_unix_groups;
718
719         for (i = 0; i < *n_groups; i++) {
720                 if (!NT_STATUS_IS_OK(gid_to_sid(&(*groups)[i], (*unix_groups)[i]))) {
721                         DEBUG(1, ("get_user_groups: failed to convert gid %ld to a sid!\n", 
722                                 (long int)(*unix_groups)[i+1]));
723                         SAFE_FREE(*groups);
724                         SAFE_FREE(*unix_groups);
725                         return NT_STATUS_NO_SUCH_USER;
726                 }
727         }
728                      
729         return NT_STATUS_OK;
730 }
731
732 /***************************************************************************
733  Make a user_info struct
734 ***************************************************************************/
735
736 static NTSTATUS make_server_info(auth_serversupplied_info **server_info)
737 {
738         *server_info = malloc(sizeof(**server_info));
739         if (!*server_info) {
740                 DEBUG(0,("make_server_info: malloc failed!\n"));
741                 return NT_STATUS_NO_MEMORY;
742         }
743         ZERO_STRUCTP(*server_info);
744
745         /* Initialise the uid and gid values to something non-zero
746            which may save us from giving away root access if there
747            is a bug in allocating these fields. */
748
749         (*server_info)->uid = -1;
750         (*server_info)->gid = -1;
751
752         return NT_STATUS_OK;
753 }
754
755 /***************************************************************************
756 Fill a server_info struct from a SAM_ACCOUNT with their groups
757 ***************************************************************************/
758
759 static NTSTATUS add_user_groups(auth_serversupplied_info **server_info, 
760                                 const char * unix_username,
761                                 SAM_ACCOUNT *sampass,
762                                 uid_t uid, gid_t gid)
763 {
764         NTSTATUS nt_status;
765         const DOM_SID *user_sid = pdb_get_user_sid(sampass);
766         const DOM_SID *group_sid = pdb_get_group_sid(sampass);
767         int       n_groupSIDs = 0;
768         DOM_SID  *groupSIDs   = NULL;
769         gid_t    *unix_groups = NULL;
770         NT_USER_TOKEN *token;
771         BOOL is_guest;
772         uint32 rid;
773
774         nt_status = get_user_groups(unix_username, uid, gid, 
775                 &n_groupSIDs, &groupSIDs, &unix_groups);
776                 
777         if (!NT_STATUS_IS_OK(nt_status)) {
778                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
779                 free_server_info(server_info);
780                 return nt_status;
781         }
782         
783         is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
784
785         if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
786                                                               n_groupSIDs, groupSIDs, is_guest, 
787                                                               &token)))
788         {
789                 DEBUG(4,("create_nt_user_token failed\n"));
790                 SAFE_FREE(groupSIDs);
791                 SAFE_FREE(unix_groups);
792                 free_server_info(server_info);
793                 return nt_status;
794         }
795         
796         SAFE_FREE(groupSIDs);
797
798         (*server_info)->n_groups = n_groupSIDs;
799         (*server_info)->groups = unix_groups;
800         (*server_info)->ptok = token;
801
802         return nt_status;
803 }
804
805 /***************************************************************************
806 Fill a server_info struct from a SAM_ACCOUNT with its privileges
807 ***************************************************************************/
808
809 static NTSTATUS add_privileges(auth_serversupplied_info **server_info)
810 {
811         PRIVILEGE_SET *privs = NULL;
812
813         init_privilege(&privs);
814         if (!pdb_get_privilege_set((*server_info)->ptok->user_sids, (*server_info)->ptok->num_sids, privs))
815                 DEBUG(1, ("Could not add privileges\n"));
816
817         (*server_info)->privs = privs;
818
819         return NT_STATUS_OK;
820 }
821
822 /***************************************************************************
823  Make (and fill) a user_info struct from a SAM_ACCOUNT
824 ***************************************************************************/
825
826 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info, 
827                               SAM_ACCOUNT *sampass)
828 {
829         NTSTATUS nt_status;
830         struct passwd *pwd;
831
832         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info)))
833                 return nt_status;
834
835         (*server_info)->sam_account    = sampass;
836
837         if ( !(pwd = getpwnam_alloc(pdb_get_username(sampass))) )  {
838                 DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
839                           pdb_get_username(sampass)));
840                 free_server_info(server_info);
841                 return NT_STATUS_NO_SUCH_USER;
842         }
843         (*server_info)->unix_name = smb_xstrdup(pwd->pw_name);
844         (*server_info)->gid = pwd->pw_gid;
845         (*server_info)->uid = pwd->pw_uid;
846         
847         passwd_free(&pwd);
848
849         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, pdb_get_username(sampass), 
850                                                          sampass,
851                                                          (*server_info)->uid, 
852                                                          (*server_info)->gid))) 
853         {
854                 free_server_info(server_info);
855                 return nt_status;
856         }
857
858         if (!NT_STATUS_IS_OK(nt_status = add_privileges(server_info))) {
859                 free_server_info(server_info);
860                 return nt_status;
861         }
862
863         (*server_info)->sam_fill_level = SAM_FILL_ALL;
864         DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
865                  pdb_get_username(sampass),
866                  (*server_info)->unix_name));
867
868         return nt_status;
869 }
870
871 /***************************************************************************
872  Make (and fill) a user_info struct from a 'struct passwd' by conversion 
873  to a SAM_ACCOUNT
874 ***************************************************************************/
875
876 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, 
877                              char *unix_username,
878                              struct passwd *pwd)
879 {
880         NTSTATUS nt_status;
881         SAM_ACCOUNT *sampass = NULL;
882         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {             
883                 return nt_status;
884         }
885         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
886                 return nt_status;
887         }
888
889         (*server_info)->sam_account    = sampass;
890
891         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, unix_username,
892                 sampass, pwd->pw_uid, pwd->pw_gid))) 
893         {
894                 return nt_status;
895         }
896
897         (*server_info)->unix_name = smb_xstrdup(unix_username);
898
899         (*server_info)->sam_fill_level = SAM_FILL_ALL;
900         (*server_info)->uid = pwd->pw_uid;
901         (*server_info)->gid = pwd->pw_gid;
902         return nt_status;
903 }
904
905 /***************************************************************************
906  Make (and fill) a user_info struct for a guest login.
907 ***************************************************************************/
908
909 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
910 {
911         NTSTATUS nt_status;
912         SAM_ACCOUNT *sampass = NULL;
913         DOM_SID guest_sid;
914
915         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
916                 return nt_status;
917         }
918
919         sid_copy(&guest_sid, get_global_sam_sid());
920         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
921
922         become_root();
923         if (!pdb_getsampwsid(sampass, &guest_sid)) {
924                 unbecome_root();
925                 return NT_STATUS_NO_SUCH_USER;
926         }
927         unbecome_root();
928
929         nt_status = make_server_info_sam(server_info, sampass);
930
931         if (NT_STATUS_IS_OK(nt_status)) {
932                 static const char zeros[16];
933                 (*server_info)->guest = True;
934                 
935                 /* annoying, but the Guest really does have a session key, 
936                    and it is all zeros! */
937                 (*server_info)->nt_session_key = data_blob(zeros, sizeof(zeros));
938                 (*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros));
939         }
940
941         return nt_status;
942 }
943
944 /***************************************************************************
945  Purely internal function for make_server_info_info3
946  Fill the sam account from getpwnam
947 ***************************************************************************/
948 static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx, 
949                                  const char *domain,
950                                  const char *username,
951                                  char **found_username,
952                                  uid_t *uid, gid_t *gid,
953                                  SAM_ACCOUNT **sam_account)
954 {
955         fstring dom_user;
956         fstring real_username;
957         struct passwd *passwd;
958
959         fstr_sprintf(dom_user, "%s%s%s", domain, lp_winbind_separator(), 
960                 username);
961
962         /* get the passwd struct but don't create the user if he/she 
963            does not exist.  We were explicitly called from a following
964            a winbindd authentication request so we should assume that 
965            nss_winbindd is working */
966
967         if ( !(passwd = smb_getpwnam( dom_user, real_username, True )) )
968                 return NT_STATUS_NO_SUCH_USER;
969
970         *uid = passwd->pw_uid;
971         *gid = passwd->pw_gid;
972
973         /* This is pointless -- there is no suport for differing 
974            unix and windows names.  Make sure to always store the 
975            one we actually looked up and succeeded. Have I mentioned
976            why I hate the 'winbind use default domain' parameter?   
977                                          --jerry              */
978            
979         *found_username = talloc_strdup( mem_ctx, real_username );
980         
981         DEBUG(5,("fill_sam_account: located username was [%s]\n",
982                 *found_username));
983
984         return pdb_init_sam_pw(sam_account, passwd);
985 }
986
987 /****************************************************************************
988  Wrapper to allow the getpwnam() call to strip the domain name and 
989  try again in case a local UNIX user is already there.  Also run through 
990  the username if we fallback to the username only.
991  ****************************************************************************/
992  
993 struct passwd *smb_getpwnam( char *domuser, fstring save_username, BOOL create )
994 {
995         struct passwd *pw = NULL;
996         char *p;
997         fstring mapped_username;
998         fstring strip_username;
999         
1000         /* we only save a copy of the username it has been mangled 
1001            by winbindd use default domain */
1002            
1003         save_username[0] = '\0';
1004         
1005         /* save a local copy of the username and run it through the 
1006            username map */
1007            
1008         fstrcpy( mapped_username, domuser );
1009         map_username( mapped_username );        
1010         
1011         p = strchr_m( mapped_username, *lp_winbind_separator() );
1012         
1013         /* code for a DOMAIN\user string */
1014         
1015         if ( p ) {
1016                 pw = Get_Pwnam( domuser );
1017                 if ( pw ) {     
1018                         /* make sure we get the case of the username correct */
1019                         /* work around 'winbind use default domain = yes' */
1020
1021                         if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1022                                 char *domain;
1023                                 
1024                                 domain = mapped_username;
1025                                 *p = '\0';
1026                                 fstr_sprintf(save_username, "%s%c%s", domain, *lp_winbind_separator(), pw->pw_name);
1027                         }
1028                         else
1029                                 fstrcpy( save_username, pw->pw_name );
1030
1031                         /* whew -- done! */             
1032                         return pw;
1033                 }
1034
1035                 /* setup for lookup of just the username */
1036                 /* remember that p and mapped_username are overlapping memory */
1037
1038                 p++;
1039                 fstrcpy( strip_username, p );
1040                 fstrcpy( mapped_username, strip_username );
1041         }
1042         
1043         /* just lookup a plain username */
1044         
1045         pw = Get_Pwnam(mapped_username);
1046                 
1047         /* Create local user if requested. */
1048         
1049         if ( !pw && create ) {
1050                 /* Don't add a machine account. */
1051                 if (mapped_username[strlen(mapped_username)-1] == '$')
1052                         return NULL;
1053
1054                 auth_add_user_script(NULL, mapped_username);
1055                 pw = Get_Pwnam(mapped_username);
1056         }
1057         
1058         /* one last check for a valid passwd struct */
1059         
1060         if ( pw )
1061                 fstrcpy( save_username, pw->pw_name );
1062
1063         return pw;
1064 }
1065
1066 /***************************************************************************
1067  Make a server_info struct from the info3 returned by a domain logon 
1068 ***************************************************************************/
1069
1070 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx, 
1071                                 const char *internal_username,
1072                                 const char *sent_nt_username,
1073                                 const char *domain,
1074                                 auth_serversupplied_info **server_info, 
1075                                 NET_USER_INFO_3 *info3) 
1076 {
1077         static const char zeros[16];
1078
1079         NTSTATUS nt_status = NT_STATUS_OK;
1080         char *found_username;
1081         const char *nt_domain;
1082         const char *nt_username;
1083
1084         SAM_ACCOUNT *sam_account = NULL;
1085         DOM_SID user_sid;
1086         DOM_SID group_sid;
1087
1088         uid_t uid;
1089         gid_t gid;
1090
1091         int n_lgroupSIDs;
1092         DOM_SID *lgroupSIDs   = NULL;
1093
1094         gid_t *unix_groups = NULL;
1095         NT_USER_TOKEN *token;
1096
1097         DOM_SID *all_group_SIDs;
1098         size_t i;
1099
1100         /* 
1101            Here is where we should check the list of
1102            trusted domains, and verify that the SID 
1103            matches.
1104         */
1105
1106         sid_copy(&user_sid, &info3->dom_sid.sid);
1107         if (!sid_append_rid(&user_sid, info3->user_rid)) {
1108                 return NT_STATUS_INVALID_PARAMETER;
1109         }
1110         
1111         sid_copy(&group_sid, &info3->dom_sid.sid);
1112         if (!sid_append_rid(&group_sid, info3->group_rid)) {
1113                 return NT_STATUS_INVALID_PARAMETER;
1114         }
1115
1116         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
1117                 /* If the server didn't give us one, just use the one we sent them */
1118                 nt_username = sent_nt_username;
1119         }
1120
1121         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
1122                 /* If the server didn't give us one, just use the one we sent them */
1123                 nt_domain = domain;
1124         }
1125         
1126         /* try to fill the SAM account..  If getpwnam() fails, then try the 
1127            add user script (2.2.x behavior) */
1128            
1129         nt_status = fill_sam_account(mem_ctx, nt_domain, internal_username,
1130                 &found_username, &uid, &gid, &sam_account);
1131
1132         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) {
1133                 DEBUG(3,("User %s does not exist, trying to add it\n", 
1134                         internal_username));
1135                 auth_add_user_script(nt_domain, internal_username);
1136                 nt_status = fill_sam_account(mem_ctx, nt_domain, 
1137                         internal_username, &found_username,
1138                         &uid, &gid, &sam_account);
1139         }
1140         
1141         if (!NT_STATUS_IS_OK(nt_status)) {
1142                 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
1143                 return nt_status;
1144         }
1145                 
1146         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1147                 pdb_free_sam(&sam_account);
1148                 return NT_STATUS_NO_MEMORY;
1149         }
1150
1151         if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1152                 pdb_free_sam(&sam_account);
1153                 return NT_STATUS_NO_MEMORY;
1154         }
1155
1156         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1157                 pdb_free_sam(&sam_account);
1158                 return NT_STATUS_NO_MEMORY;
1159         }
1160
1161         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1162                 pdb_free_sam(&sam_account);
1163                 return NT_STATUS_UNSUCCESSFUL;
1164         }
1165
1166         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1167                 pdb_free_sam(&sam_account);
1168                 return NT_STATUS_UNSUCCESSFUL;
1169         }
1170                 
1171         if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)), 
1172                               PDB_CHANGED)) {
1173                 pdb_free_sam(&sam_account);
1174                 return NT_STATUS_NO_MEMORY;
1175         }
1176
1177         if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) {
1178                 pdb_free_sam(&sam_account);
1179                 return NT_STATUS_NO_MEMORY;
1180         }
1181
1182         if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) {
1183                 pdb_free_sam(&sam_account);
1184                 return NT_STATUS_NO_MEMORY;
1185         }
1186
1187         if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) {
1188                 pdb_free_sam(&sam_account);
1189                 return NT_STATUS_NO_MEMORY;
1190         }
1191
1192         if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) {
1193                 pdb_free_sam(&sam_account);
1194                 return NT_STATUS_NO_MEMORY;
1195         }
1196
1197         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
1198                 DEBUG(4, ("make_server_info failed!\n"));
1199                 pdb_free_sam(&sam_account);
1200                 return nt_status;
1201         }
1202
1203         /* save this here to _net_sam_logon() doesn't fail (it assumes a 
1204            valid SAM_ACCOUNT) */
1205                    
1206         (*server_info)->sam_account = sam_account;
1207
1208         (*server_info)->unix_name = smb_xstrdup(found_username);
1209
1210         /* Fill in the unix info we found on the way */
1211
1212         (*server_info)->sam_fill_level = SAM_FILL_ALL;
1213         (*server_info)->uid = uid;
1214         (*server_info)->gid = gid;
1215
1216         /* Store the user group information in the server_info 
1217            returned to the caller. */
1218         
1219         nt_status = get_user_groups((*server_info)->unix_name,
1220                 uid, gid, &n_lgroupSIDs, &lgroupSIDs, &unix_groups);
1221                 
1222         if ( !NT_STATUS_IS_OK(nt_status) ) {
1223                 DEBUG(4,("get_user_groups failed\n"));
1224                 return nt_status;
1225         }
1226
1227         (*server_info)->groups = unix_groups;
1228         (*server_info)->n_groups = n_lgroupSIDs;
1229         
1230         /* Create a 'combined' list of all SIDs we might want in the SD */
1231         
1232         all_group_SIDs = malloc(sizeof(DOM_SID) * (info3->num_groups2 +info3->num_other_sids));
1233         
1234         if (!all_group_SIDs) {
1235                 DEBUG(0, ("malloc() failed for DOM_SID list!\n"));
1236                 SAFE_FREE(lgroupSIDs);
1237                 free_server_info(server_info);
1238                 return NT_STATUS_NO_MEMORY;
1239         }
1240
1241 #if 0   /* JERRY -- no such thing as local groups in current code */
1242         /* Copy the 'local' sids */
1243         memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
1244         SAFE_FREE(lgroupSIDs);
1245 #endif
1246
1247         /* and create (by appending rids) the 'domain' sids */
1248         
1249         for (i = 0; i < info3->num_groups2; i++) {
1250         
1251                 sid_copy(&all_group_SIDs[i], &(info3->dom_sid.sid));
1252                 
1253                 if (!sid_append_rid(&all_group_SIDs[i], info3->gids[i].g_rid)) {
1254                 
1255                         nt_status = NT_STATUS_INVALID_PARAMETER;
1256                         
1257                         DEBUG(3,("could not append additional group rid 0x%x\n",
1258                                 info3->gids[i].g_rid));                 
1259                                 
1260                         SAFE_FREE(lgroupSIDs);
1261                         free_server_info(server_info);
1262                         
1263                         return nt_status;
1264                         
1265                 }
1266         }
1267
1268         /* Copy 'other' sids.  We need to do sid filtering here to
1269            prevent possible elevation of privileges.  See:
1270
1271            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1272          */
1273
1274         for (i = 0; i < info3->num_other_sids; i++) {
1275                 sid_copy(&all_group_SIDs[info3->num_groups2 + i],
1276                          &info3->other_sids[i].sid);
1277         }
1278         
1279         /* Where are the 'global' sids... */
1280
1281         /* can the user be guest? if yes, where is it stored? */
1282         
1283         nt_status = create_nt_user_token(&user_sid, &group_sid,
1284                 info3->num_groups2 + info3->num_other_sids,
1285                 all_group_SIDs, False, &token);
1286                 
1287         if ( !NT_STATUS_IS_OK(nt_status) ) {
1288                 DEBUG(4,("create_nt_user_token failed\n"));
1289                 SAFE_FREE(all_group_SIDs);
1290                 free_server_info(server_info);
1291                 return nt_status;
1292         }
1293
1294         (*server_info)->ptok = token; 
1295
1296         SAFE_FREE(all_group_SIDs);
1297
1298         /* ensure we are never given NULL session keys */
1299         
1300         if (memcmp(info3->user_sess_key, zeros, sizeof(zeros)) == 0) {
1301                 (*server_info)->nt_session_key = data_blob(NULL, 0);
1302         } else {
1303                 (*server_info)->nt_session_key = data_blob(info3->user_sess_key, sizeof(info3->user_sess_key));
1304         }
1305
1306         if (memcmp(info3->padding, zeros, sizeof(zeros)) == 0) {
1307                 (*server_info)->lm_session_key = data_blob(NULL, 0);
1308         } else {
1309                 (*server_info)->lm_session_key = data_blob(info3->padding, 16);
1310         }
1311         return NT_STATUS_OK;
1312 }
1313
1314 /***************************************************************************
1315  Free a user_info struct
1316 ***************************************************************************/
1317
1318 void free_user_info(auth_usersupplied_info **user_info)
1319 {
1320         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1321         if (*user_info != NULL) {
1322                 if ((*user_info)->smb_name.str) {
1323                         DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1324                 }
1325                 SAFE_FREE((*user_info)->smb_name.str);
1326                 SAFE_FREE((*user_info)->internal_username.str);
1327                 SAFE_FREE((*user_info)->client_domain.str);
1328                 SAFE_FREE((*user_info)->domain.str);
1329                 SAFE_FREE((*user_info)->wksta_name.str);
1330                 data_blob_free(&(*user_info)->lm_resp);
1331                 data_blob_free(&(*user_info)->nt_resp);
1332                 SAFE_FREE((*user_info)->interactive_password);
1333                 data_blob_clear_free(&(*user_info)->plaintext_password);
1334                 ZERO_STRUCT(**user_info);
1335         }
1336         SAFE_FREE(*user_info);
1337 }
1338
1339 /***************************************************************************
1340  Clear out a server_info struct that has been allocated
1341 ***************************************************************************/
1342
1343 void free_server_info(auth_serversupplied_info **server_info)
1344 {
1345         DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1346         if (*server_info != NULL) {
1347                 pdb_free_sam(&(*server_info)->sam_account);
1348
1349                 /* call pam_end here, unless we know we are keeping it */
1350                 delete_nt_token( &(*server_info)->ptok );
1351                 SAFE_FREE((*server_info)->groups);
1352                 SAFE_FREE((*server_info)->unix_name);
1353                 data_blob_free(&(*server_info)->lm_session_key);
1354                 data_blob_free(&(*server_info)->nt_session_key);
1355                 ZERO_STRUCT(**server_info);
1356         }
1357         SAFE_FREE(*server_info);
1358 }
1359
1360 /***************************************************************************
1361  Make an auth_methods struct
1362 ***************************************************************************/
1363
1364 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method) 
1365 {
1366         if (!auth_context) {
1367                 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1368         }
1369
1370         if (!auth_method) {
1371                 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1372         }
1373
1374         *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1375         if (!*auth_method) {
1376                 DEBUG(0,("make_auth_method: malloc failed!\n"));
1377                 return False;
1378         }
1379         ZERO_STRUCTP(*auth_method);
1380         
1381         return True;
1382 }
1383
1384 /****************************************************************************
1385  Delete a SID token.
1386 ****************************************************************************/
1387
1388 void delete_nt_token(NT_USER_TOKEN **pptoken)
1389 {
1390     if (*pptoken) {
1391             NT_USER_TOKEN *ptoken = *pptoken;
1392             SAFE_FREE( ptoken->user_sids );
1393             ZERO_STRUCTP(ptoken);
1394     }
1395     SAFE_FREE(*pptoken);
1396 }
1397
1398 /****************************************************************************
1399  Duplicate a SID token.
1400 ****************************************************************************/
1401
1402 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1403 {
1404         NT_USER_TOKEN *token;
1405
1406         if (!ptoken)
1407                 return NULL;
1408
1409     if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1410         return NULL;
1411
1412     ZERO_STRUCTP(token);
1413
1414     if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1415         SAFE_FREE(token);
1416         return NULL;
1417     }
1418
1419     token->num_sids = ptoken->num_sids;
1420
1421         return token;
1422 }
1423
1424 /**
1425  * Squash an NT_STATUS in line with security requirements.
1426  * In an attempt to avoid giving the whole game away when users
1427  * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and 
1428  * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations 
1429  * (session setups in particular).
1430  *
1431  * @param nt_status NTSTATUS input for squashing.
1432  * @return the 'squashed' nt_status
1433  **/
1434
1435 NTSTATUS nt_status_squash(NTSTATUS nt_status)
1436 {
1437         if NT_STATUS_IS_OK(nt_status) {
1438                 return nt_status;               
1439         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
1440                 /* Match WinXP and don't give the game away */
1441                 return NT_STATUS_LOGON_FAILURE;
1442                 
1443         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
1444                 /* Match WinXP and don't give the game away */
1445                 return NT_STATUS_LOGON_FAILURE;
1446         } else {
1447                 return nt_status;
1448         }  
1449 }
1450
1451
1452 /**
1453  * Verify whether or not given domain is trusted.
1454  *
1455  * @param domain_name name of the domain to be verified
1456  * @return true if domain is one of the trusted once or
1457  *         false if otherwise
1458  **/
1459
1460 BOOL is_trusted_domain(const char* dom_name)
1461 {
1462         DOM_SID trustdom_sid;
1463         char *pass = NULL;
1464         time_t lct;
1465         BOOL ret;
1466
1467         /* no trusted domains for a standalone server */
1468
1469         if ( lp_server_role() == ROLE_STANDALONE )
1470                 return False;
1471
1472         /* if we are a DC, then check for a direct trust relationships */
1473
1474         if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) {
1475                 become_root();
1476                 ret = secrets_fetch_trusted_domain_password(dom_name, &pass, &trustdom_sid, &lct);
1477                 unbecome_root();
1478                 SAFE_FREE(pass);
1479                 if (ret)
1480                         return True;
1481         }
1482         else {
1483                 /* if winbindd is not up and we are a domain member) then we need to update the
1484                    trustdom_cache ourselves */
1485
1486                 if ( !winbind_ping() )
1487                         update_trustdom_cache();
1488         }
1489
1490         /* now the trustdom cache should be available a DC could still
1491          * have a transitive trust so fall back to the cache of trusted
1492          * domains (like a domain member would use  */
1493
1494         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
1495                 return True;
1496         }
1497
1498         return False;
1499 }
1500