source3/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 *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
 129                                DATA_BLOB *plaintext,
 130                                BOOL encrypted)
 131 {
 132
 133         DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
 134
 135         *user_info = malloc(sizeof(**user_info));
 136         if (!user_info) {
 137                 DEBUG(0,("malloc failed for user_info (size %lu)\n", (unsigned long)sizeof(*user_info)));
 138                 return NT_STATUS_NO_MEMORY;
 139         }
 140
 141         ZERO_STRUCTP(*user_info);
 142
 143         DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
 144
 145         (*user_info)->smb_name.str = strdup(smb_name);
 146         if ((*user_info)->smb_name.str) {
 147                 (*user_info)->smb_name.len = strlen(smb_name);
 148         } else {
 149                 free_user_info(user_info);
 150                 return NT_STATUS_NO_MEMORY;
 151         }
 152
 153         (*user_info)->internal_username.str = strdup(internal_username);
 154         if ((*user_info)->internal_username.str) {
 155                 (*user_info)->internal_username.len = strlen(internal_username);
 156         } else {
 157                 free_user_info(user_info);
 158                 return NT_STATUS_NO_MEMORY;
 159         }
 160
 161         (*user_info)->domain.str = strdup(domain);
 162         if ((*user_info)->domain.str) {
 163                 (*user_info)->domain.len = strlen(domain);
 164         } else {
 165                 free_user_info(user_info);
 166                 return NT_STATUS_NO_MEMORY;
 167         }
 168
 169         (*user_info)->client_domain.str = strdup(client_domain);
 170         if ((*user_info)->client_domain.str) {
 171                 (*user_info)->client_domain.len = strlen(client_domain);
 172         } else {
 173                 free_user_info(user_info);
 174                 return NT_STATUS_NO_MEMORY;
 175         }
 176
 177         (*user_info)->wksta_name.str = strdup(wksta_name);
 178         if ((*user_info)->wksta_name.str) {
 179                 (*user_info)->wksta_name.len = strlen(wksta_name);
 180         } else {
 181                 free_user_info(user_info);
 182                 return NT_STATUS_NO_MEMORY;
 183         }
 184
 185         DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
 186
 187         if (lm_pwd)
 188                 (*user_info)->lm_resp = data_blob(lm_pwd->data, lm_pwd->length);
 189         if (nt_pwd)
 190                 (*user_info)->nt_resp = data_blob(nt_pwd->data, nt_pwd->length);
 191         if (lm_interactive_pwd)
 192                 (*user_info)->lm_interactive_pwd = data_blob(lm_interactive_pwd->data, lm_interactive_pwd->length);
 193         if (nt_interactive_pwd)
 194                 (*user_info)->nt_interactive_pwd = data_blob(nt_interactive_pwd->data, nt_interactive_pwd->length);
 195
 196         if (plaintext)
 197                 (*user_info)->plaintext_password = data_blob(plaintext->data, plaintext->length);
 198
 199         (*user_info)->encrypted = encrypted;
 200
 201         DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
 202
 203         return NT_STATUS_OK;
 204 }
 205
 206 /****************************************************************************
 207  Create an auth_usersupplied_data structure after appropriate mapping.
 208 ****************************************************************************/
 209
 210 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
 211                             const char *smb_name,
 212                             const char *client_domain,
 213                             const char *wksta_name,
 214                             DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
 215                             DATA_BLOB *lm_interactive_pwd, DATA_BLOB *nt_interactive_pwd,
 216                             DATA_BLOB *plaintext,
 217                             BOOL encrypted)
 218 {
 219         const char *domain;
 220         fstring internal_username;
 221         fstrcpy(internal_username, smb_name);
 222         map_username(internal_username);
 223
 224         DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
 225               client_domain, smb_name, wksta_name));
 226
 227         /* don't allow "" as a domain, fixes a Win9X bug
 228            where it doens't supply a domain for logon script
 229            'net use' commands.                                 */
 230
 231         if ( *client_domain )
 232                 domain = client_domain;
 233         else
 234                 domain = lp_workgroup();
 235
 236         /* do what win2k does.  Always map unknown domains to our own
 237            and let the "passdb backend" handle unknown users. */
 238
 239         if ( !is_trusted_domain(domain) && !strequal(domain, get_global_sam_name()) )
 240                 domain = get_default_sam_name();
 241
 242         /* we know that it is a trusted domain (and we are allowing them) or it is our domain */
 243
 244         return make_user_info(user_info, smb_name, internal_username,
 245                               client_domain, domain, wksta_name,
 246                               lm_pwd, nt_pwd,
 247                               lm_interactive_pwd, nt_interactive_pwd,
 248                               plaintext, encrypted);
 249 }
 250
 251 /****************************************************************************
 252  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 253  Decrypt and encrypt the passwords.
 254 ****************************************************************************/
 255
 256 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
 257                                      const char *smb_name,
 258                                      const char *client_domain,
 259                                      const char *wksta_name,
 260                                      const uchar *lm_network_pwd, int lm_pwd_len,
 261                                      const uchar *nt_network_pwd, int nt_pwd_len)
 262 {
 263         BOOL ret;
 264         NTSTATUS nt_status;
 265         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
 266         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
 267
 268         nt_status = make_user_info_map(user_info,
 269                                        smb_name, client_domain,
 270                                        wksta_name,
 271                                        lm_pwd_len ? &lm_blob : NULL,
 272                                        nt_pwd_len ? &nt_blob : NULL,
 273                                        NULL, NULL, NULL,
 274                                        True);
 275
 276         ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 277
 278         data_blob_free(&lm_blob);
 279         data_blob_free(&nt_blob);
 280         return ret;
 281 }
 282
 283 /****************************************************************************
 284  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 285  Decrypt and encrypt the passwords.
 286 ****************************************************************************/
 287
 288 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
 289                                          const char *smb_name,
 290                                          const char *client_domain,
 291                                          const char *wksta_name,
 292                                          const uchar chal[8],
 293                                          const uchar lm_interactive_pwd[16],
 294                                          const uchar nt_interactive_pwd[16],
 295                                          const uchar *dc_sess_key)
 296 {
 297         char lm_pwd[16];
 298         char nt_pwd[16];
 299         unsigned char local_lm_response[24];
 300         unsigned char local_nt_response[24];
 301         unsigned char key[16];
 302
 303         ZERO_STRUCT(key);
 304         memcpy(key, dc_sess_key, 8);
 305
 306         if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
 307         if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
 308
 309 #ifdef DEBUG_PASSWORD
 310         DEBUG(100,("key:"));
 311         dump_data(100, (char *)key, sizeof(key));
 312
 313         DEBUG(100,("lm owf password:"));
 314         dump_data(100, lm_pwd, sizeof(lm_pwd));
 315
 316         DEBUG(100,("nt owf password:"));
 317         dump_data(100, nt_pwd, sizeof(nt_pwd));
 318 #endif
 319
 320         if (lm_interactive_pwd)
 321                 SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
 322
 323         if (nt_interactive_pwd)
 324                 SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
 325
 326 #ifdef DEBUG_PASSWORD
 327         DEBUG(100,("decrypt of lm owf password:"));
 328         dump_data(100, lm_pwd, sizeof(lm_pwd));
 329
 330         DEBUG(100,("decrypt of nt owf password:"));
 331         dump_data(100, nt_pwd, sizeof(nt_pwd));
 332 #endif
 333
 334         if (lm_interactive_pwd)
 335                 SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
 336
 337         if (nt_interactive_pwd)
 338                 SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
 339
 340         /* Password info paranoia */
 341         ZERO_STRUCT(key);
 342
 343         {
 344                 BOOL ret;
 345                 NTSTATUS nt_status;
 346                 DATA_BLOB local_lm_blob;
 347                 DATA_BLOB local_nt_blob;
 348
 349                 DATA_BLOB lm_interactive_blob;
 350                 DATA_BLOB nt_interactive_blob;
 351
 352                 if (lm_interactive_pwd) {
 353                         local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
 354                         lm_interactive_blob = data_blob(lm_pwd, sizeof(lm_pwd));
 355                         ZERO_STRUCT(lm_pwd);
 356                 }
 357
 358                 if (nt_interactive_pwd) {
 359                         local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
 360                         nt_interactive_blob = data_blob(nt_pwd, sizeof(nt_pwd));
 361                         ZERO_STRUCT(nt_pwd);
 362                 }
 363
 364                 nt_status = make_user_info_map(user_info,
 365                                                smb_name, client_domain,
 366                                                wksta_name,
 367                                                lm_interactive_pwd ? &local_lm_blob : NULL,
 368                                                nt_interactive_pwd ? &local_nt_blob : NULL,
 369                                                lm_interactive_pwd ? &lm_interactive_blob : NULL,
 370                                                nt_interactive_pwd ? &nt_interactive_blob : NULL,
 371                                                NULL,
 372                                                True);
 373
 374                 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 375                 data_blob_free(&local_lm_blob);
 376                 data_blob_free(&local_nt_blob);
 377                 data_blob_free(&lm_interactive_blob);
 378                 data_blob_free(&nt_interactive_blob);
 379                 return ret;
 380         }
 381 }
 382
 383
 384 /****************************************************************************
 385  Create an auth_usersupplied_data structure
 386 ****************************************************************************/
 387
 388 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
 389                               const char *smb_name,
 390                               const char *client_domain,
 391                               const uint8 chal[8],
 392                               DATA_BLOB plaintext_password)
 393 {
 394
 395         DATA_BLOB local_lm_blob;
 396         DATA_BLOB local_nt_blob;
 397         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 398
 399         /*
 400          * Not encrypted - do so.
 401          */
 402
 403         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n"));
 404
 405         if (plaintext_password.data) {
 406                 unsigned char local_lm_response[24];
 407
 408 #ifdef DEBUG_PASSWORD
 409                 DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length));
 410                 dump_data(100, plaintext_password.data, plaintext_password.length);
 411 #endif
 412
 413                 SMBencrypt( (const char *)plaintext_password.data, (const uchar*)chal, local_lm_response);
 414                 local_lm_blob = data_blob(local_lm_response, 24);
 415
 416                 /* We can't do an NT hash here, as the password needs to be
 417                    case insensitive */
 418                 local_nt_blob = data_blob(NULL, 0);
 419
 420         } else {
 421                 local_lm_blob = data_blob(NULL, 0);
 422                 local_nt_blob = data_blob(NULL, 0);
 423         }
 424
 425         ret = make_user_info_map(user_info, smb_name,
 426                                  client_domain,
 427                                  get_remote_machine_name(),
 428                                  local_lm_blob.data ? &local_lm_blob : NULL,
 429                                  local_nt_blob.data ? &local_nt_blob : NULL,
 430                                  NULL, NULL,
 431                                  plaintext_password.data ? &plaintext_password : NULL,
 432                                  False);
 433
 434         data_blob_free(&local_lm_blob);
 435         return NT_STATUS_IS_OK(ret) ? True : False;
 436 }
 437
 438 /****************************************************************************
 439  Create an auth_usersupplied_data structure
 440 ****************************************************************************/
 441
 442 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
 443                                       const char *smb_name,
 444                                       const char *client_domain,
 445                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 446 {
 447         return make_user_info_map(user_info, smb_name,
 448                                   client_domain,
 449                                   get_remote_machine_name(),
 450                                   lm_resp.data ? &lm_resp : NULL,
 451                                   nt_resp.data ? &nt_resp : NULL,
 452                                   NULL, NULL, NULL,
 453                                   True);
 454 }
 455
 456 /****************************************************************************
 457  Create a guest user_info blob, for anonymous authenticaion.
 458 ****************************************************************************/
 459
 460 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
 461 {
 462         NTSTATUS nt_status;
 463
 464         nt_status = make_user_info(user_info,
 465                                    "","",
 466                                    "","",
 467                                    "",
 468                                    NULL, NULL,
 469                                    NULL, NULL,
 470                                    NULL,
 471                                    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  Make (and fill) a user_info struct from a SAM_ACCOUNT
 807 ***************************************************************************/
 808
 809 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
 810                               SAM_ACCOUNT *sampass)
 811 {
 812         NTSTATUS nt_status;
 813         struct passwd *pwd;
 814
 815         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info)))
 816                 return nt_status;
 817
 818         (*server_info)->sam_account    = sampass;
 819
 820         if ( !(pwd = getpwnam_alloc(pdb_get_username(sampass))) )  {
 821                 DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
 822                           pdb_get_username(sampass)));
 823                 free_server_info(server_info);
 824                 return NT_STATUS_NO_SUCH_USER;
 825         }
 826         (*server_info)->unix_name = smb_xstrdup(pwd->pw_name);
 827         (*server_info)->gid = pwd->pw_gid;
 828         (*server_info)->uid = pwd->pw_uid;
 829
 830         passwd_free(&pwd);
 831
 832         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, pdb_get_username(sampass),
 833                                                          sampass,
 834                                                          (*server_info)->uid,
 835                                                          (*server_info)->gid)))
 836         {
 837                 free_server_info(server_info);
 838                 return nt_status;
 839         }
 840
 841         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 842         DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
 843                  pdb_get_username(sampass),
 844                  (*server_info)->unix_name));
 845
 846         return nt_status;
 847 }
 848
 849 /***************************************************************************
 850  Make (and fill) a user_info struct from a 'struct passwd' by conversion
 851  to a SAM_ACCOUNT
 852 ***************************************************************************/
 853
 854 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info,
 855                              char *unix_username,
 856                              struct passwd *pwd)
 857 {
 858         NTSTATUS nt_status;
 859         SAM_ACCOUNT *sampass = NULL;
 860         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
 861                 return nt_status;
 862         }
 863         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
 864                 return nt_status;
 865         }
 866
 867         (*server_info)->sam_account    = sampass;
 868
 869         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, unix_username,
 870                 sampass, pwd->pw_uid, pwd->pw_gid)))
 871         {
 872                 return nt_status;
 873         }
 874
 875         (*server_info)->unix_name = smb_xstrdup(unix_username);
 876
 877         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 878         (*server_info)->uid = pwd->pw_uid;
 879         (*server_info)->gid = pwd->pw_gid;
 880         return nt_status;
 881 }
 882
 883 /***************************************************************************
 884  Make (and fill) a user_info struct for a guest login.
 885 ***************************************************************************/
 886
 887 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
 888 {
 889         NTSTATUS nt_status;
 890         SAM_ACCOUNT *sampass = NULL;
 891         DOM_SID guest_sid;
 892
 893         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
 894                 return nt_status;
 895         }
 896
 897         sid_copy(&guest_sid, get_global_sam_sid());
 898         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
 899
 900         become_root();
 901         if (!pdb_getsampwsid(sampass, &guest_sid)) {
 902                 unbecome_root();
 903                 return NT_STATUS_NO_SUCH_USER;
 904         }
 905         unbecome_root();
 906
 907         nt_status = make_server_info_sam(server_info, sampass);
 908
 909         if (NT_STATUS_IS_OK(nt_status)) {
 910                 static const char zeros[16];
 911                 (*server_info)->guest = True;
 912
 913                 /* annoying, but the Guest really does have a session key,
 914                    and it is all zeros! */
 915                 (*server_info)->user_session_key = data_blob(zeros, sizeof(zeros));
 916                 (*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros));
 917         }
 918
 919         return nt_status;
 920 }
 921
 922 /***************************************************************************
 923  Purely internal function for make_server_info_info3
 924  Fill the sam account from getpwnam
 925 ***************************************************************************/
 926 static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx,
 927                                  const char *domain,
 928                                  const char *username,
 929                                  char **found_username,
 930                                  uid_t *uid, gid_t *gid,
 931                                  SAM_ACCOUNT **sam_account)
 932 {
 933         fstring dom_user, lower_username;
 934         fstring real_username;
 935         struct passwd *passwd;
 936
 937         fstrcpy( lower_username, username );
 938         strlower_m( lower_username );
 939
 940         fstr_sprintf(dom_user, "%s%c%s", domain, *lp_winbind_separator(),
 941                 lower_username);
 942
 943         /* get the passwd struct but don't create the user if he/she
 944            does not exist.  We were explicitly called from a following
 945            a winbindd authentication request so we should assume that
 946            nss_winbindd is working */
 947
 948         map_username( dom_user );
 949
 950         if ( !(passwd = smb_getpwnam( dom_user, real_username, True )) )
 951                 return NT_STATUS_NO_SUCH_USER;
 952
 953         *uid = passwd->pw_uid;
 954         *gid = passwd->pw_gid;
 955
 956         /* This is pointless -- there is no suport for differing
 957            unix and windows names.  Make sure to always store the
 958            one we actually looked up and succeeded. Have I mentioned
 959            why I hate the 'winbind use default domain' parameter?
 960                                          --jerry              */
 961
 962         *found_username = talloc_strdup( mem_ctx, real_username );
 963
 964         DEBUG(5,("fill_sam_account: located username was [%s]\n",
 965                 *found_username));
 966
 967         return pdb_init_sam_pw(sam_account, passwd);
 968 }
 969
 970 /****************************************************************************
 971  Wrapper to allow the getpwnam() call to strip the domain name and
 972  try again in case a local UNIX user is already there.  Also run through
 973  the username if we fallback to the username only.
 974  ****************************************************************************/
 975
 976 struct passwd *smb_getpwnam( char *domuser, fstring save_username, BOOL create )
 977 {
 978         struct passwd *pw = NULL;
 979         char *p;
 980         fstring username;
 981
 982         /* we only save a copy of the username it has been mangled
 983            by winbindd use default domain */
 984
 985         save_username[0] = '\0';
 986
 987         /* don't call map_username() here since it has to be done higher
 988            up the stack so we don't call it mutliple times */
 989
 990         fstrcpy( username, domuser );
 991
 992         p = strchr_m( username, *lp_winbind_separator() );
 993
 994         /* code for a DOMAIN\user string */
 995
 996         if ( p ) {
 997                 fstring strip_username;
 998
 999                 pw = Get_Pwnam( domuser );
1000                 if ( pw ) {
1001                         /* make sure we get the case of the username correct */
1002                         /* work around 'winbind use default domain = yes' */
1003
1004                         if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1005                                 char *domain;
1006
1007                                 /* split the domain and username into 2 strings */
1008                                 *p = '\0';
1009                                 domain = username;
1010
1011                                 fstr_sprintf(save_username, "%s%c%s", domain, *lp_winbind_separator(), pw->pw_name);
1012                         }
1013                         else
1014                                 fstrcpy( save_username, pw->pw_name );
1015
1016                         /* whew -- done! */
1017                         return pw;
1018                 }
1019
1020                 /* setup for lookup of just the username */
1021                 /* remember that p and username are overlapping memory */
1022
1023                 p++;
1024                 fstrcpy( strip_username, p );
1025                 fstrcpy( username, strip_username );
1026         }
1027
1028         /* just lookup a plain username */
1029
1030         pw = Get_Pwnam(username);
1031
1032         /* Create local user if requested. */
1033
1034         if ( !pw && create ) {
1035                 /* Don't add a machine account. */
1036                 if (username[strlen(username)-1] == '$')
1037                         return NULL;
1038
1039                 auth_add_user_script(NULL, username);
1040                 pw = Get_Pwnam(username);
1041         }
1042
1043         /* one last check for a valid passwd struct */
1044
1045         if ( pw )
1046                 fstrcpy( save_username, pw->pw_name );
1047
1048         return pw;
1049 }
1050
1051 /***************************************************************************
1052  Make a server_info struct from the info3 returned by a domain logon
1053 ***************************************************************************/
1054
1055 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1056                                 const char *internal_username,
1057                                 const char *sent_nt_username,
1058                                 const char *domain,
1059                                 auth_serversupplied_info **server_info,
1060                                 NET_USER_INFO_3 *info3)
1061 {
1062         static const char zeros[16];
1063
1064         NTSTATUS nt_status = NT_STATUS_OK;
1065         char *found_username;
1066         const char *nt_domain;
1067         const char *nt_username;
1068
1069         SAM_ACCOUNT *sam_account = NULL;
1070         DOM_SID user_sid;
1071         DOM_SID group_sid;
1072
1073         uid_t uid;
1074         gid_t gid;
1075
1076         int n_lgroupSIDs;
1077         DOM_SID *lgroupSIDs   = NULL;
1078
1079         gid_t *unix_groups = NULL;
1080         NT_USER_TOKEN *token;
1081
1082         DOM_SID *all_group_SIDs;
1083         size_t i;
1084
1085         /*
1086            Here is where we should check the list of
1087            trusted domains, and verify that the SID
1088            matches.
1089         */
1090
1091         sid_copy(&user_sid, &info3->dom_sid.sid);
1092         if (!sid_append_rid(&user_sid, info3->user_rid)) {
1093                 return NT_STATUS_INVALID_PARAMETER;
1094         }
1095
1096         sid_copy(&group_sid, &info3->dom_sid.sid);
1097         if (!sid_append_rid(&group_sid, info3->group_rid)) {
1098                 return NT_STATUS_INVALID_PARAMETER;
1099         }
1100
1101         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
1102                 /* If the server didn't give us one, just use the one we sent them */
1103                 nt_username = sent_nt_username;
1104         }
1105
1106         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
1107                 /* If the server didn't give us one, just use the one we sent them */
1108                 nt_domain = domain;
1109         }
1110
1111         /* try to fill the SAM account..  If getpwnam() fails, then try the
1112            add user script (2.2.x behavior).
1113
1114            We use the _unmapped_ username here in an attempt to provide
1115            consistent username mapping behavior between kerberos and NTLM[SSP]
1116            authentication in domain mode security.  I.E. Username mapping should
1117            be applied to the fully qualified username (e.g. DOMAIN\user) and
1118            no just the login name.  Yes this mean swe called map_username()
1119            unnecessarily in make_user_info_map() but that is how the current
1120            code is designed.  Making the change here is the least disruptive
1121            place.    -- jerry */
1122
1123         nt_status = fill_sam_account(mem_ctx, nt_domain, sent_nt_username,
1124                 &found_username, &uid, &gid, &sam_account);
1125
1126         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) {
1127                 DEBUG(3,("User %s does not exist, trying to add it\n", internal_username));
1128                 auth_add_user_script( nt_domain, sent_nt_username );
1129                 nt_status = fill_sam_account( mem_ctx, nt_domain, sent_nt_username,
1130                         &found_username, &uid, &gid, &sam_account );
1131         }
1132
1133         if (!NT_STATUS_IS_OK(nt_status)) {
1134                 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
1135                 return nt_status;
1136         }
1137
1138         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1139                 pdb_free_sam(&sam_account);
1140                 return NT_STATUS_NO_MEMORY;
1141         }
1142
1143         if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1144                 pdb_free_sam(&sam_account);
1145                 return NT_STATUS_NO_MEMORY;
1146         }
1147
1148         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1149                 pdb_free_sam(&sam_account);
1150                 return NT_STATUS_NO_MEMORY;
1151         }
1152
1153         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1154                 pdb_free_sam(&sam_account);
1155                 return NT_STATUS_UNSUCCESSFUL;
1156         }
1157
1158         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1159                 pdb_free_sam(&sam_account);
1160                 return NT_STATUS_UNSUCCESSFUL;
1161         }
1162
1163         if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)),
1164                               PDB_CHANGED)) {
1165                 pdb_free_sam(&sam_account);
1166                 return NT_STATUS_NO_MEMORY;
1167         }
1168
1169         if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) {
1170                 pdb_free_sam(&sam_account);
1171                 return NT_STATUS_NO_MEMORY;
1172         }
1173
1174         if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) {
1175                 pdb_free_sam(&sam_account);
1176                 return NT_STATUS_NO_MEMORY;
1177         }
1178
1179         if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) {
1180                 pdb_free_sam(&sam_account);
1181                 return NT_STATUS_NO_MEMORY;
1182         }
1183
1184         if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) {
1185                 pdb_free_sam(&sam_account);
1186                 return NT_STATUS_NO_MEMORY;
1187         }
1188
1189         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
1190                 DEBUG(4, ("make_server_info failed!\n"));
1191                 pdb_free_sam(&sam_account);
1192                 return nt_status;
1193         }
1194
1195         /* save this here to _net_sam_logon() doesn't fail (it assumes a
1196            valid SAM_ACCOUNT) */
1197
1198         (*server_info)->sam_account = sam_account;
1199
1200         (*server_info)->unix_name = smb_xstrdup(found_username);
1201
1202         /* Fill in the unix info we found on the way */
1203
1204         (*server_info)->sam_fill_level = SAM_FILL_ALL;
1205         (*server_info)->uid = uid;
1206         (*server_info)->gid = gid;
1207
1208         /* Store the user group information in the server_info
1209            returned to the caller. */
1210
1211         nt_status = get_user_groups((*server_info)->unix_name,
1212                 uid, gid, &n_lgroupSIDs, &lgroupSIDs, &unix_groups);
1213
1214         if ( !NT_STATUS_IS_OK(nt_status) ) {
1215                 DEBUG(4,("get_user_groups failed\n"));
1216                 return nt_status;
1217         }
1218
1219         (*server_info)->groups = unix_groups;
1220         (*server_info)->n_groups = n_lgroupSIDs;
1221
1222         /* Create a 'combined' list of all SIDs we might want in the SD */
1223
1224         all_group_SIDs = malloc(sizeof(DOM_SID) * (info3->num_groups2 + info3->num_other_sids + n_lgroupSIDs));
1225
1226         if (!all_group_SIDs) {
1227                 DEBUG(0, ("malloc() failed for DOM_SID list!\n"));
1228                 SAFE_FREE(lgroupSIDs);
1229                 free_server_info(server_info);
1230                 return NT_STATUS_NO_MEMORY;
1231         }
1232
1233         /* and create (by appending rids) the 'domain' sids */
1234
1235         for (i = 0; i < info3->num_groups2; i++) {
1236
1237                 sid_copy(&all_group_SIDs[i], &(info3->dom_sid.sid));
1238
1239                 if (!sid_append_rid(&all_group_SIDs[i], info3->gids[i].g_rid)) {
1240
1241                         nt_status = NT_STATUS_INVALID_PARAMETER;
1242
1243                         DEBUG(3,("could not append additional group rid 0x%x\n",
1244                                 info3->gids[i].g_rid));
1245
1246                         SAFE_FREE(lgroupSIDs);
1247                         SAFE_FREE(all_group_SIDs);
1248                         free_server_info(server_info);
1249
1250                         return nt_status;
1251
1252                 }
1253         }
1254
1255         /* Copy 'other' sids.  We need to do sid filtering here to
1256            prevent possible elevation of privileges.  See:
1257
1258            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1259          */
1260
1261         for (i = 0; i < info3->num_other_sids; i++) {
1262                 sid_copy(&all_group_SIDs[info3->num_groups2 + i],
1263                          &info3->other_sids[i].sid);
1264         }
1265
1266
1267         /* add local alias sids */
1268
1269         for (i = 0; i < n_lgroupSIDs; i++) {
1270                 sid_copy(&all_group_SIDs[info3->num_groups2 +
1271                                          info3->num_other_sids + i],
1272                          &lgroupSIDs[i]);
1273         }
1274
1275         /* Where are the 'global' sids... */
1276
1277         /* can the user be guest? if yes, where is it stored? */
1278
1279         nt_status = create_nt_user_token(&user_sid, &group_sid,
1280                 info3->num_groups2 + info3->num_other_sids + n_lgroupSIDs,
1281                 all_group_SIDs, False, &token);
1282
1283         if ( !NT_STATUS_IS_OK(nt_status) ) {
1284                 DEBUG(4,("create_nt_user_token failed\n"));
1285                 SAFE_FREE(lgroupSIDs);
1286                 SAFE_FREE(all_group_SIDs);
1287                 free_server_info(server_info);
1288                 return nt_status;
1289         }
1290
1291         (*server_info)->ptok = token;
1292
1293         SAFE_FREE(lgroupSIDs);
1294         SAFE_FREE(all_group_SIDs);
1295
1296         /* ensure we are never given NULL session keys */
1297
1298         if (memcmp(info3->user_sess_key, zeros, sizeof(zeros)) == 0) {
1299                 (*server_info)->user_session_key = data_blob(NULL, 0);
1300         } else {
1301                 (*server_info)->user_session_key = data_blob(info3->user_sess_key, sizeof(info3->user_sess_key));
1302         }
1303
1304         if (memcmp(info3->padding, zeros, sizeof(zeros)) == 0) {
1305                 (*server_info)->lm_session_key = data_blob(NULL, 0);
1306         } else {
1307                 (*server_info)->lm_session_key = data_blob(info3->padding, 16);
1308         }
1309         return NT_STATUS_OK;
1310 }
1311
1312 /***************************************************************************
1313  Free a user_info struct
1314 ***************************************************************************/
1315
1316 void free_user_info(auth_usersupplied_info **user_info)
1317 {
1318         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1319         if (*user_info != NULL) {
1320                 if ((*user_info)->smb_name.str) {
1321                         DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1322                 }
1323                 SAFE_FREE((*user_info)->smb_name.str);
1324                 SAFE_FREE((*user_info)->internal_username.str);
1325                 SAFE_FREE((*user_info)->client_domain.str);
1326                 SAFE_FREE((*user_info)->domain.str);
1327                 SAFE_FREE((*user_info)->wksta_name.str);
1328                 data_blob_free(&(*user_info)->lm_resp);
1329                 data_blob_free(&(*user_info)->nt_resp);
1330                 data_blob_clear_free(&(*user_info)->lm_interactive_pwd);
1331                 data_blob_clear_free(&(*user_info)->nt_interactive_pwd);
1332                 data_blob_clear_free(&(*user_info)->plaintext_password);
1333                 ZERO_STRUCT(**user_info);
1334         }
1335         SAFE_FREE(*user_info);
1336 }
1337
1338 /***************************************************************************
1339  Clear out a server_info struct that has been allocated
1340 ***************************************************************************/
1341
1342 void free_server_info(auth_serversupplied_info **server_info)
1343 {
1344         DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1345         if (*server_info != NULL) {
1346                 pdb_free_sam(&(*server_info)->sam_account);
1347
1348                 /* call pam_end here, unless we know we are keeping it */
1349                 delete_nt_token( &(*server_info)->ptok );
1350                 SAFE_FREE((*server_info)->groups);
1351                 SAFE_FREE((*server_info)->unix_name);
1352                 data_blob_free(&(*server_info)->lm_session_key);
1353                 data_blob_free(&(*server_info)->user_session_key);
1354                 ZERO_STRUCT(**server_info);
1355         }
1356         SAFE_FREE(*server_info);
1357 }
1358
1359 /***************************************************************************
1360  Make an auth_methods struct
1361 ***************************************************************************/
1362
1363 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1364 {
1365         if (!auth_context) {
1366                 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1367         }
1368
1369         if (!auth_method) {
1370                 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1371         }
1372
1373         *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1374         if (!*auth_method) {
1375                 DEBUG(0,("make_auth_method: malloc failed!\n"));
1376                 return False;
1377         }
1378         ZERO_STRUCTP(*auth_method);
1379
1380         return True;
1381 }
1382
1383 /****************************************************************************
1384  Delete a SID token.
1385 ****************************************************************************/
1386
1387 void delete_nt_token(NT_USER_TOKEN **pptoken)
1388 {
1389     if (*pptoken) {
1390             NT_USER_TOKEN *ptoken = *pptoken;
1391             SAFE_FREE( ptoken->user_sids );
1392             ZERO_STRUCTP(ptoken);
1393     }
1394     SAFE_FREE(*pptoken);
1395 }
1396
1397 /****************************************************************************
1398  Duplicate a SID token.
1399 ****************************************************************************/
1400
1401 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1402 {
1403         NT_USER_TOKEN *token;
1404
1405         if (!ptoken)
1406                 return NULL;
1407
1408     if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1409         return NULL;
1410
1411     ZERO_STRUCTP(token);
1412
1413     if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1414         SAFE_FREE(token);
1415         return NULL;
1416     }
1417
1418     token->num_sids = ptoken->num_sids;
1419
1420         return token;
1421 }
1422
1423 /**
1424  * Verify whether or not given domain is trusted.
1425  *
1426  * @param domain_name name of the domain to be verified
1427  * @return true if domain is one of the trusted once or
1428  *         false if otherwise
1429  **/
1430
1431 BOOL is_trusted_domain(const char* dom_name)
1432 {
1433         DOM_SID trustdom_sid;
1434         char *pass = NULL;
1435         time_t lct;
1436         BOOL ret;
1437
1438         /* no trusted domains for a standalone server */
1439
1440         if ( lp_server_role() == ROLE_STANDALONE )
1441                 return False;
1442
1443         /* if we are a DC, then check for a direct trust relationships */
1444
1445         if ( IS_DC ) {
1446                 become_root();
1447                 DEBUG (5,("is_trusted_domain: Checking for domain trust with [%s]\n",
1448                         dom_name ));
1449                 ret = secrets_fetch_trusted_domain_password(dom_name, &pass, &trustdom_sid, &lct);
1450                 unbecome_root();
1451                 SAFE_FREE(pass);
1452                 if (ret)
1453                         return True;
1454         }
1455         else {
1456                 /* if winbindd is not up and we are a domain member) then we need to update the
1457                    trustdom_cache ourselves */
1458
1459                 if ( !winbind_ping() )
1460                         update_trustdom_cache();
1461         }
1462
1463         /* now the trustdom cache should be available a DC could still
1464          * have a transitive trust so fall back to the cache of trusted
1465          * domains (like a domain member would use  */
1466
1467         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
1468                 return True;
1469         }
1470
1471         return False;
1472 }
1473