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;
 934         fstring real_username;
 935         struct passwd *passwd;
 936
 937         fstr_sprintf(dom_user, "%s%s%s", domain, lp_winbind_separator(),
 938                 username);
 939
 940         /* get the passwd struct but don't create the user if he/she
 941            does not exist.  We were explicitly called from a following
 942            a winbindd authentication request so we should assume that
 943            nss_winbindd is working */
 944
 945         if ( !(passwd = smb_getpwnam( dom_user, real_username, True )) )
 946                 return NT_STATUS_NO_SUCH_USER;
 947
 948         *uid = passwd->pw_uid;
 949         *gid = passwd->pw_gid;
 950
 951         /* This is pointless -- there is no suport for differing
 952            unix and windows names.  Make sure to always store the
 953            one we actually looked up and succeeded. Have I mentioned
 954            why I hate the 'winbind use default domain' parameter?
 955                                          --jerry              */
 956
 957         *found_username = talloc_strdup( mem_ctx, real_username );
 958
 959         DEBUG(5,("fill_sam_account: located username was [%s]\n",
 960                 *found_username));
 961
 962         return pdb_init_sam_pw(sam_account, passwd);
 963 }
 964
 965 /****************************************************************************
 966  Wrapper to allow the getpwnam() call to strip the domain name and
 967  try again in case a local UNIX user is already there.  Also run through
 968  the username if we fallback to the username only.
 969  ****************************************************************************/
 970
 971 struct passwd *smb_getpwnam( char *domuser, fstring save_username, BOOL create )
 972 {
 973         struct passwd *pw = NULL;
 974         char *p;
 975         fstring mapped_username;
 976         fstring strip_username;
 977
 978         /* we only save a copy of the username it has been mangled
 979            by winbindd use default domain */
 980
 981         save_username[0] = '\0';
 982
 983         /* save a local copy of the username and run it through the
 984            username map */
 985
 986         fstrcpy( mapped_username, domuser );
 987         map_username( mapped_username );
 988
 989         p = strchr_m( mapped_username, *lp_winbind_separator() );
 990
 991         /* code for a DOMAIN\user string */
 992
 993         if ( p ) {
 994                 pw = Get_Pwnam( domuser );
 995                 if ( pw ) {
 996                         /* make sure we get the case of the username correct */
 997                         /* work around 'winbind use default domain = yes' */
 998
 999                         if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1000                                 char *domain;
1001
1002                                 domain = mapped_username;
1003                                 *p = '\0';
1004                                 fstr_sprintf(save_username, "%s%c%s", domain, *lp_winbind_separator(), pw->pw_name);
1005                         }
1006                         else
1007                                 fstrcpy( save_username, pw->pw_name );
1008
1009                         /* whew -- done! */
1010                         return pw;
1011                 }
1012
1013                 /* setup for lookup of just the username */
1014                 /* remember that p and mapped_username are overlapping memory */
1015
1016                 p++;
1017                 fstrcpy( strip_username, p );
1018                 fstrcpy( mapped_username, strip_username );
1019         }
1020
1021         /* just lookup a plain username */
1022
1023         pw = Get_Pwnam(mapped_username);
1024
1025         /* Create local user if requested. */
1026
1027         if ( !pw && create ) {
1028                 /* Don't add a machine account. */
1029                 if (mapped_username[strlen(mapped_username)-1] == '$')
1030                         return NULL;
1031
1032                 auth_add_user_script(NULL, mapped_username);
1033                 pw = Get_Pwnam(mapped_username);
1034         }
1035
1036         /* one last check for a valid passwd struct */
1037
1038         if ( pw )
1039                 fstrcpy( save_username, pw->pw_name );
1040
1041         return pw;
1042 }
1043
1044 /***************************************************************************
1045  Make a server_info struct from the info3 returned by a domain logon
1046 ***************************************************************************/
1047
1048 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1049                                 const char *internal_username,
1050                                 const char *sent_nt_username,
1051                                 const char *domain,
1052                                 auth_serversupplied_info **server_info,
1053                                 NET_USER_INFO_3 *info3)
1054 {
1055         static const char zeros[16];
1056
1057         NTSTATUS nt_status = NT_STATUS_OK;
1058         char *found_username;
1059         const char *nt_domain;
1060         const char *nt_username;
1061
1062         SAM_ACCOUNT *sam_account = NULL;
1063         DOM_SID user_sid;
1064         DOM_SID group_sid;
1065
1066         uid_t uid;
1067         gid_t gid;
1068
1069         int n_lgroupSIDs;
1070         DOM_SID *lgroupSIDs   = NULL;
1071
1072         gid_t *unix_groups = NULL;
1073         NT_USER_TOKEN *token;
1074
1075         DOM_SID *all_group_SIDs;
1076         size_t i;
1077
1078         /*
1079            Here is where we should check the list of
1080            trusted domains, and verify that the SID
1081            matches.
1082         */
1083
1084         sid_copy(&user_sid, &info3->dom_sid.sid);
1085         if (!sid_append_rid(&user_sid, info3->user_rid)) {
1086                 return NT_STATUS_INVALID_PARAMETER;
1087         }
1088
1089         sid_copy(&group_sid, &info3->dom_sid.sid);
1090         if (!sid_append_rid(&group_sid, info3->group_rid)) {
1091                 return NT_STATUS_INVALID_PARAMETER;
1092         }
1093
1094         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
1095                 /* If the server didn't give us one, just use the one we sent them */
1096                 nt_username = sent_nt_username;
1097         }
1098
1099         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
1100                 /* If the server didn't give us one, just use the one we sent them */
1101                 nt_domain = domain;
1102         }
1103
1104         /* try to fill the SAM account..  If getpwnam() fails, then try the
1105            add user script (2.2.x behavior) */
1106
1107         nt_status = fill_sam_account(mem_ctx, nt_domain, internal_username,
1108                 &found_username, &uid, &gid, &sam_account);
1109
1110         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) {
1111                 DEBUG(3,("User %s does not exist, trying to add it\n",
1112                         internal_username));
1113                 auth_add_user_script(nt_domain, internal_username);
1114                 nt_status = fill_sam_account(mem_ctx, nt_domain,
1115                         internal_username, &found_username,
1116                         &uid, &gid, &sam_account);
1117         }
1118
1119         if (!NT_STATUS_IS_OK(nt_status)) {
1120                 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
1121                 return nt_status;
1122         }
1123
1124         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1125                 pdb_free_sam(&sam_account);
1126                 return NT_STATUS_NO_MEMORY;
1127         }
1128
1129         if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1130                 pdb_free_sam(&sam_account);
1131                 return NT_STATUS_NO_MEMORY;
1132         }
1133
1134         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1135                 pdb_free_sam(&sam_account);
1136                 return NT_STATUS_NO_MEMORY;
1137         }
1138
1139         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1140                 pdb_free_sam(&sam_account);
1141                 return NT_STATUS_UNSUCCESSFUL;
1142         }
1143
1144         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1145                 pdb_free_sam(&sam_account);
1146                 return NT_STATUS_UNSUCCESSFUL;
1147         }
1148
1149         if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)),
1150                               PDB_CHANGED)) {
1151                 pdb_free_sam(&sam_account);
1152                 return NT_STATUS_NO_MEMORY;
1153         }
1154
1155         if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) {
1156                 pdb_free_sam(&sam_account);
1157                 return NT_STATUS_NO_MEMORY;
1158         }
1159
1160         if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) {
1161                 pdb_free_sam(&sam_account);
1162                 return NT_STATUS_NO_MEMORY;
1163         }
1164
1165         if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) {
1166                 pdb_free_sam(&sam_account);
1167                 return NT_STATUS_NO_MEMORY;
1168         }
1169
1170         if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) {
1171                 pdb_free_sam(&sam_account);
1172                 return NT_STATUS_NO_MEMORY;
1173         }
1174
1175         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
1176                 DEBUG(4, ("make_server_info failed!\n"));
1177                 pdb_free_sam(&sam_account);
1178                 return nt_status;
1179         }
1180
1181         /* save this here to _net_sam_logon() doesn't fail (it assumes a
1182            valid SAM_ACCOUNT) */
1183
1184         (*server_info)->sam_account = sam_account;
1185
1186         (*server_info)->unix_name = smb_xstrdup(found_username);
1187
1188         /* Fill in the unix info we found on the way */
1189
1190         (*server_info)->sam_fill_level = SAM_FILL_ALL;
1191         (*server_info)->uid = uid;
1192         (*server_info)->gid = gid;
1193
1194         /* Store the user group information in the server_info
1195            returned to the caller. */
1196
1197         nt_status = get_user_groups((*server_info)->unix_name,
1198                 uid, gid, &n_lgroupSIDs, &lgroupSIDs, &unix_groups);
1199
1200         if ( !NT_STATUS_IS_OK(nt_status) ) {
1201                 DEBUG(4,("get_user_groups failed\n"));
1202                 return nt_status;
1203         }
1204
1205         (*server_info)->groups = unix_groups;
1206         (*server_info)->n_groups = n_lgroupSIDs;
1207
1208         /* Create a 'combined' list of all SIDs we might want in the SD */
1209
1210         all_group_SIDs = malloc(sizeof(DOM_SID) * (info3->num_groups2 +info3->num_other_sids));
1211
1212         if (!all_group_SIDs) {
1213                 DEBUG(0, ("malloc() failed for DOM_SID list!\n"));
1214                 SAFE_FREE(lgroupSIDs);
1215                 free_server_info(server_info);
1216                 return NT_STATUS_NO_MEMORY;
1217         }
1218
1219 #if 0   /* JERRY -- no such thing as local groups in current code */
1220         /* Copy the 'local' sids */
1221         memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
1222         SAFE_FREE(lgroupSIDs);
1223 #endif
1224
1225         /* and create (by appending rids) the 'domain' sids */
1226
1227         for (i = 0; i < info3->num_groups2; i++) {
1228
1229                 sid_copy(&all_group_SIDs[i], &(info3->dom_sid.sid));
1230
1231                 if (!sid_append_rid(&all_group_SIDs[i], info3->gids[i].g_rid)) {
1232
1233                         nt_status = NT_STATUS_INVALID_PARAMETER;
1234
1235                         DEBUG(3,("could not append additional group rid 0x%x\n",
1236                                 info3->gids[i].g_rid));
1237
1238                         SAFE_FREE(lgroupSIDs);
1239                         SAFE_FREE(all_group_SIDs);
1240                         free_server_info(server_info);
1241
1242                         return nt_status;
1243
1244                 }
1245         }
1246
1247         /* Copy 'other' sids.  We need to do sid filtering here to
1248            prevent possible elevation of privileges.  See:
1249
1250            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1251          */
1252
1253         for (i = 0; i < info3->num_other_sids; i++) {
1254                 sid_copy(&all_group_SIDs[info3->num_groups2 + i],
1255                          &info3->other_sids[i].sid);
1256         }
1257
1258         /* Where are the 'global' sids... */
1259
1260         /* can the user be guest? if yes, where is it stored? */
1261
1262         nt_status = create_nt_user_token(&user_sid, &group_sid,
1263                 info3->num_groups2 + info3->num_other_sids,
1264                 all_group_SIDs, False, &token);
1265
1266         if ( !NT_STATUS_IS_OK(nt_status) ) {
1267                 DEBUG(4,("create_nt_user_token failed\n"));
1268                 SAFE_FREE(lgroupSIDs);
1269                 SAFE_FREE(all_group_SIDs);
1270                 free_server_info(server_info);
1271                 return nt_status;
1272         }
1273
1274         (*server_info)->ptok = token;
1275
1276         SAFE_FREE(lgroupSIDs);
1277         SAFE_FREE(all_group_SIDs);
1278
1279         /* ensure we are never given NULL session keys */
1280
1281         if (memcmp(info3->user_sess_key, zeros, sizeof(zeros)) == 0) {
1282                 (*server_info)->user_session_key = data_blob(NULL, 0);
1283         } else {
1284                 (*server_info)->user_session_key = data_blob(info3->user_sess_key, sizeof(info3->user_sess_key));
1285         }
1286
1287         if (memcmp(info3->padding, zeros, sizeof(zeros)) == 0) {
1288                 (*server_info)->lm_session_key = data_blob(NULL, 0);
1289         } else {
1290                 (*server_info)->lm_session_key = data_blob(info3->padding, 16);
1291         }
1292         return NT_STATUS_OK;
1293 }
1294
1295 /***************************************************************************
1296  Free a user_info struct
1297 ***************************************************************************/
1298
1299 void free_user_info(auth_usersupplied_info **user_info)
1300 {
1301         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1302         if (*user_info != NULL) {
1303                 if ((*user_info)->smb_name.str) {
1304                         DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1305                 }
1306                 SAFE_FREE((*user_info)->smb_name.str);
1307                 SAFE_FREE((*user_info)->internal_username.str);
1308                 SAFE_FREE((*user_info)->client_domain.str);
1309                 SAFE_FREE((*user_info)->domain.str);
1310                 SAFE_FREE((*user_info)->wksta_name.str);
1311                 data_blob_free(&(*user_info)->lm_resp);
1312                 data_blob_free(&(*user_info)->nt_resp);
1313                 data_blob_clear_free(&(*user_info)->lm_interactive_pwd);
1314                 data_blob_clear_free(&(*user_info)->nt_interactive_pwd);
1315                 data_blob_clear_free(&(*user_info)->plaintext_password);
1316                 ZERO_STRUCT(**user_info);
1317         }
1318         SAFE_FREE(*user_info);
1319 }
1320
1321 /***************************************************************************
1322  Clear out a server_info struct that has been allocated
1323 ***************************************************************************/
1324
1325 void free_server_info(auth_serversupplied_info **server_info)
1326 {
1327         DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1328         if (*server_info != NULL) {
1329                 pdb_free_sam(&(*server_info)->sam_account);
1330
1331                 /* call pam_end here, unless we know we are keeping it */
1332                 delete_nt_token( &(*server_info)->ptok );
1333                 SAFE_FREE((*server_info)->groups);
1334                 SAFE_FREE((*server_info)->unix_name);
1335                 data_blob_free(&(*server_info)->lm_session_key);
1336                 data_blob_free(&(*server_info)->user_session_key);
1337                 ZERO_STRUCT(**server_info);
1338         }
1339         SAFE_FREE(*server_info);
1340 }
1341
1342 /***************************************************************************
1343  Make an auth_methods struct
1344 ***************************************************************************/
1345
1346 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1347 {
1348         if (!auth_context) {
1349                 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1350         }
1351
1352         if (!auth_method) {
1353                 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1354         }
1355
1356         *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1357         if (!*auth_method) {
1358                 DEBUG(0,("make_auth_method: malloc failed!\n"));
1359                 return False;
1360         }
1361         ZERO_STRUCTP(*auth_method);
1362
1363         return True;
1364 }
1365
1366 /****************************************************************************
1367  Delete a SID token.
1368 ****************************************************************************/
1369
1370 void delete_nt_token(NT_USER_TOKEN **pptoken)
1371 {
1372     if (*pptoken) {
1373             NT_USER_TOKEN *ptoken = *pptoken;
1374             SAFE_FREE( ptoken->user_sids );
1375             ZERO_STRUCTP(ptoken);
1376     }
1377     SAFE_FREE(*pptoken);
1378 }
1379
1380 /****************************************************************************
1381  Duplicate a SID token.
1382 ****************************************************************************/
1383
1384 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1385 {
1386         NT_USER_TOKEN *token;
1387
1388         if (!ptoken)
1389                 return NULL;
1390
1391     if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1392         return NULL;
1393
1394     ZERO_STRUCTP(token);
1395
1396     if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1397         SAFE_FREE(token);
1398         return NULL;
1399     }
1400
1401     token->num_sids = ptoken->num_sids;
1402
1403         return token;
1404 }
1405
1406 /**
1407  * Verify whether or not given domain is trusted.
1408  *
1409  * @param domain_name name of the domain to be verified
1410  * @return true if domain is one of the trusted once or
1411  *         false if otherwise
1412  **/
1413
1414 BOOL is_trusted_domain(const char* dom_name)
1415 {
1416         DOM_SID trustdom_sid;
1417         char *pass = NULL;
1418         time_t lct;
1419         BOOL ret;
1420
1421         /* no trusted domains for a standalone server */
1422
1423         if ( lp_server_role() == ROLE_STANDALONE )
1424                 return False;
1425
1426         /* if we are a DC, then check for a direct trust relationships */
1427
1428         if ( IS_DC ) {
1429                 become_root();
1430                 DEBUG (5,("is_trusted_domain: Checking for domain trust with [%s]\n",
1431                         dom_name ));
1432                 ret = secrets_fetch_trusted_domain_password(dom_name, &pass, &trustdom_sid, &lct);
1433                 unbecome_root();
1434                 SAFE_FREE(pass);
1435                 if (ret)
1436                         return True;
1437         }
1438         else {
1439                 /* if winbindd is not up and we are a domain member) then we need to update the
1440                    trustdom_cache ourselves */
1441
1442                 if ( !winbind_ping() )
1443                         update_trustdom_cache();
1444         }
1445
1446         /* now the trustdom cache should be available a DC could still
1447          * have a transitive trust so fall back to the cache of trusted
1448          * domains (like a domain member would use  */
1449
1450         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
1451                 return True;
1452         }
1453
1454         return False;
1455 }
1456