source/auth/auth_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Authentication utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Andrew Bartlett 2001
   6    Copyright (C) Jeremy Allison 2000-2001
   7    Copyright (C) Rafal Szczesniak 2002
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_AUTH
  28
  29 extern DOM_SID global_sid_World;
  30 extern DOM_SID global_sid_Network;
  31 extern DOM_SID global_sid_Builtin_Guests;
  32 extern DOM_SID global_sid_Authenticated_Users;
  33
  34
  35 /****************************************************************************
  36  Create a UNIX user on demand.
  37 ****************************************************************************/
  38
  39 static int smb_create_user(const char *domain, const char *unix_username, const char *homedir)
  40 {
  41         pstring add_script;
  42         int ret;
  43
  44         pstrcpy(add_script, lp_adduser_script());
  45         if (! *add_script)
  46                 return -1;
  47         all_string_sub(add_script, "%u", unix_username, sizeof(pstring));
  48         if (domain)
  49                 all_string_sub(add_script, "%D", domain, sizeof(pstring));
  50         if (homedir)
  51                 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
  52         ret = smbrun(add_script,NULL);
  53         DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
  54         return ret;
  55 }
  56
  57 /****************************************************************************
  58  Add and Delete UNIX users on demand, based on NTSTATUS codes.
  59  We don't care about RID's here so ignore.
  60 ****************************************************************************/
  61
  62 void auth_add_user_script(const char *domain, const char *username)
  63 {
  64         uint32 rid;
  65         /*
  66          * User validated ok against Domain controller.
  67          * If the admin wants us to try and create a UNIX
  68          * user on the fly, do so.
  69          */
  70
  71         if ( *lp_adduser_script() )
  72                 smb_create_user(domain, username, NULL);
  73         else {
  74                 DEBUG(10,("auth_add_user_script: no 'add user script'.  Asking winbindd\n"));
  75
  76                 /* should never get here is we a re a domain member running winbindd
  77                    However, a host set for 'security = server' might run winbindd for
  78                    account allocation */
  79
  80                 if ( !winbind_create_user(username, NULL) ) {
  81                         DEBUG(5,("auth_add_user_script: winbindd_create_user() failed\n"));
  82                         rid = 0;
  83                 }
  84         }
  85 }
  86
  87 /****************************************************************************
  88  Create a SAM_ACCOUNT - either by looking in the pdb, or by faking it up from
  89  unix info.
  90 ****************************************************************************/
  91
  92 NTSTATUS auth_get_sam_account(const char *user, SAM_ACCOUNT **account)
  93 {
  94         BOOL pdb_ret;
  95         NTSTATUS nt_status;
  96         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(account))) {
  97                 return nt_status;
  98         }
  99
 100         become_root();
 101         pdb_ret = pdb_getsampwnam(*account, user);
 102         unbecome_root();
 103
 104         if (!pdb_ret) {
 105
 106                 struct passwd *pass = Get_Pwnam(user);
 107                 if (!pass)
 108                         return NT_STATUS_NO_SUCH_USER;
 109
 110                 if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*account, pass))) {
 111                         return nt_status;
 112                 }
 113         }
 114         return NT_STATUS_OK;
 115 }
 116
 117 /****************************************************************************
 118  Create an auth_usersupplied_data structure
 119 ****************************************************************************/
 120
 121 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
 122                                const char *smb_name,
 123                                const char *internal_username,
 124                                const char *client_domain,
 125                                const char *domain,
 126                                const char *wksta_name,
 127                                DATA_BLOB *lm_pwd, DATA_BLOB *nt_pwd,
 128                                DATA_BLOB *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         if (strchr(username, *lp_winbind_separator()) == NULL) {
 662                 NTSTATUS result;
 663
 664                 become_root();
 665                 result = pdb_enum_group_memberships(username, gid, groups,
 666                                                     unix_groups, n_groups);
 667                 unbecome_root();
 668                 return result;
 669         }
 670
 671         /* We have the separator, this must be winbind */
 672
 673         n_unix_groups = winbind_getgroups( username, unix_groups );
 674
 675         DEBUG(10,("get_user_groups: winbind_getgroups(%s): result = %s\n",
 676                   username,  n_unix_groups == -1 ? "FAIL" : "SUCCESS"));
 677
 678         if ( n_unix_groups == -1 )
 679                 return NT_STATUS_NO_SUCH_USER; /* what should this return
 680                                                 * value be? */
 681
 682         debug_unix_user_token(DBGC_CLASS, 5, uid, gid, n_unix_groups, *unix_groups);
 683
 684         /* now setup the space for storing the SIDS */
 685
 686         if (n_unix_groups > 0) {
 687
 688                 *groups   = malloc(sizeof(DOM_SID) * n_unix_groups);
 689
 690                 if (!*groups) {
 691                         DEBUG(0, ("get_user_group: malloc() failed for DOM_SID list!\n"));
 692                         SAFE_FREE(*unix_groups);
 693                         return NT_STATUS_NO_MEMORY;
 694                 }
 695         }
 696
 697         *n_groups = n_unix_groups;
 698
 699         for (i = 0; i < *n_groups; i++) {
 700                 if (!NT_STATUS_IS_OK(gid_to_sid(&(*groups)[i], (*unix_groups)[i]))) {
 701                         DEBUG(1, ("get_user_groups: failed to convert gid %ld to a sid!\n",
 702                                 (long int)(*unix_groups)[i+1]));
 703                         SAFE_FREE(*groups);
 704                         SAFE_FREE(*unix_groups);
 705                         return NT_STATUS_NO_SUCH_USER;
 706                 }
 707         }
 708
 709         return NT_STATUS_OK;
 710 }
 711
 712 /***************************************************************************
 713  Make a user_info struct
 714 ***************************************************************************/
 715
 716 static NTSTATUS make_server_info(auth_serversupplied_info **server_info)
 717 {
 718         *server_info = malloc(sizeof(**server_info));
 719         if (!*server_info) {
 720                 DEBUG(0,("make_server_info: malloc failed!\n"));
 721                 return NT_STATUS_NO_MEMORY;
 722         }
 723         ZERO_STRUCTP(*server_info);
 724
 725         /* Initialise the uid and gid values to something non-zero
 726            which may save us from giving away root access if there
 727            is a bug in allocating these fields. */
 728
 729         (*server_info)->uid = -1;
 730         (*server_info)->gid = -1;
 731
 732         return NT_STATUS_OK;
 733 }
 734
 735 /***************************************************************************
 736 Fill a server_info struct from a SAM_ACCOUNT with their groups
 737 ***************************************************************************/
 738
 739 static NTSTATUS add_user_groups(auth_serversupplied_info **server_info,
 740                                 const char * unix_username,
 741                                 SAM_ACCOUNT *sampass,
 742                                 uid_t uid, gid_t gid)
 743 {
 744         NTSTATUS nt_status;
 745         const DOM_SID *user_sid = pdb_get_user_sid(sampass);
 746         const DOM_SID *group_sid = pdb_get_group_sid(sampass);
 747         int       n_groupSIDs = 0;
 748         DOM_SID  *groupSIDs   = NULL;
 749         gid_t    *unix_groups = NULL;
 750         NT_USER_TOKEN *token;
 751         BOOL is_guest;
 752         uint32 rid;
 753
 754         nt_status = get_user_groups(unix_username, uid, gid,
 755                 &n_groupSIDs, &groupSIDs, &unix_groups);
 756
 757         if (!NT_STATUS_IS_OK(nt_status)) {
 758                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
 759                 free_server_info(server_info);
 760                 return nt_status;
 761         }
 762
 763         is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
 764
 765         if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
 766                                                               n_groupSIDs, groupSIDs, is_guest,
 767                                                               &token)))
 768         {
 769                 DEBUG(4,("create_nt_user_token failed\n"));
 770                 SAFE_FREE(groupSIDs);
 771                 SAFE_FREE(unix_groups);
 772                 free_server_info(server_info);
 773                 return nt_status;
 774         }
 775
 776         SAFE_FREE(groupSIDs);
 777
 778         (*server_info)->n_groups = n_groupSIDs;
 779         (*server_info)->groups = unix_groups;
 780         (*server_info)->ptok = token;
 781
 782         return nt_status;
 783 }
 784
 785 /***************************************************************************
 786  Make (and fill) a user_info struct from a SAM_ACCOUNT
 787 ***************************************************************************/
 788
 789 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
 790                               SAM_ACCOUNT *sampass)
 791 {
 792         NTSTATUS nt_status;
 793         struct passwd *pwd;
 794
 795         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info)))
 796                 return nt_status;
 797
 798         (*server_info)->sam_account    = sampass;
 799
 800         if ( !(pwd = getpwnam_alloc(pdb_get_username(sampass))) )  {
 801                 DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
 802                           pdb_get_username(sampass)));
 803                 free_server_info(server_info);
 804                 return NT_STATUS_NO_SUCH_USER;
 805         }
 806         (*server_info)->unix_name = smb_xstrdup(pwd->pw_name);
 807         (*server_info)->gid = pwd->pw_gid;
 808         (*server_info)->uid = pwd->pw_uid;
 809
 810         passwd_free(&pwd);
 811
 812         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, pdb_get_username(sampass),
 813                                                          sampass,
 814                                                          (*server_info)->uid,
 815                                                          (*server_info)->gid)))
 816         {
 817                 free_server_info(server_info);
 818                 return nt_status;
 819         }
 820
 821         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 822         DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
 823                  pdb_get_username(sampass),
 824                  (*server_info)->unix_name));
 825
 826         return nt_status;
 827 }
 828
 829 /***************************************************************************
 830  Make (and fill) a user_info struct from a 'struct passwd' by conversion
 831  to a SAM_ACCOUNT
 832 ***************************************************************************/
 833
 834 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info,
 835                              char *unix_username,
 836                              struct passwd *pwd)
 837 {
 838         NTSTATUS nt_status;
 839         SAM_ACCOUNT *sampass = NULL;
 840         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
 841                 return nt_status;
 842         }
 843         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
 844                 return nt_status;
 845         }
 846
 847         (*server_info)->sam_account    = sampass;
 848
 849         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, unix_username,
 850                 sampass, pwd->pw_uid, pwd->pw_gid)))
 851         {
 852                 return nt_status;
 853         }
 854
 855         (*server_info)->unix_name = smb_xstrdup(unix_username);
 856
 857         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 858         (*server_info)->uid = pwd->pw_uid;
 859         (*server_info)->gid = pwd->pw_gid;
 860         return nt_status;
 861 }
 862
 863 /***************************************************************************
 864  Make (and fill) a user_info struct for a guest login.
 865 ***************************************************************************/
 866
 867 static NTSTATUS make_new_server_info_guest(auth_serversupplied_info **server_info)
 868 {
 869         NTSTATUS nt_status;
 870         SAM_ACCOUNT *sampass = NULL;
 871         DOM_SID guest_sid;
 872
 873         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
 874                 return nt_status;
 875         }
 876
 877         sid_copy(&guest_sid, get_global_sam_sid());
 878         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
 879
 880         become_root();
 881         if (!pdb_getsampwsid(sampass, &guest_sid)) {
 882                 unbecome_root();
 883                 return NT_STATUS_NO_SUCH_USER;
 884         }
 885         unbecome_root();
 886
 887         nt_status = make_server_info_sam(server_info, sampass);
 888
 889         if (NT_STATUS_IS_OK(nt_status)) {
 890                 static const char zeros[16];
 891                 (*server_info)->guest = True;
 892
 893                 /* annoying, but the Guest really does have a session key,
 894                    and it is all zeros! */
 895                 (*server_info)->user_session_key = data_blob(zeros, sizeof(zeros));
 896                 (*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros));
 897         }
 898
 899         return nt_status;
 900 }
 901
 902 static auth_serversupplied_info *copy_serverinfo(auth_serversupplied_info *src)
 903 {
 904         auth_serversupplied_info *dst;
 905
 906         if (!NT_STATUS_IS_OK(make_server_info(&dst)))
 907                 return NULL;
 908
 909         dst->guest = src->guest;
 910         dst->uid = src->uid;
 911         dst->gid = src->gid;
 912         dst->n_groups = src->n_groups;
 913         if (src->n_groups != 0)
 914                 dst->groups = memdup(src->groups, sizeof(gid_t)*dst->n_groups);
 915         else
 916                 dst->groups = NULL;
 917         dst->ptok = dup_nt_token(src->ptok);
 918         dst->user_session_key = data_blob(src->user_session_key.data,
 919                                           src->user_session_key.length);
 920         dst->lm_session_key = data_blob(src->lm_session_key.data,
 921                                           src->lm_session_key.length);
 922         pdb_copy_sam_account(src->sam_account, &dst->sam_account);
 923         dst->pam_handle = NULL;
 924         dst->unix_name = smb_xstrdup(src->unix_name);
 925
 926         return dst;
 927 }
 928
 929 static auth_serversupplied_info *guest_info = NULL;
 930
 931 BOOL init_guest_info(void)
 932 {
 933         if (guest_info != NULL)
 934                 return True;
 935
 936         return NT_STATUS_IS_OK(make_new_server_info_guest(&guest_info));
 937 }
 938
 939 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
 940 {
 941         *server_info = copy_serverinfo(guest_info);
 942         return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
 943 }
 944
 945 /***************************************************************************
 946  Purely internal function for make_server_info_info3
 947  Fill the sam account from getpwnam
 948 ***************************************************************************/
 949 static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx,
 950                                  const char *domain,
 951                                  const char *username,
 952                                  char **found_username,
 953                                  uid_t *uid, gid_t *gid,
 954                                  SAM_ACCOUNT **sam_account)
 955 {
 956         fstring dom_user, lower_username;
 957         fstring real_username;
 958         struct passwd *passwd;
 959
 960         fstrcpy( lower_username, username );
 961         strlower_m( lower_username );
 962
 963         fstr_sprintf(dom_user, "%s%c%s", domain, *lp_winbind_separator(),
 964                 lower_username);
 965
 966         /* get the passwd struct but don't create the user if he/she
 967            does not exist.  We were explicitly called from a following
 968            a winbindd authentication request so we should assume that
 969            nss_winbindd is working */
 970
 971         map_username( dom_user );
 972
 973         if ( !(passwd = smb_getpwnam( dom_user, real_username, True )) )
 974                 return NT_STATUS_NO_SUCH_USER;
 975
 976         *uid = passwd->pw_uid;
 977         *gid = passwd->pw_gid;
 978
 979         /* This is pointless -- there is no suport for differing
 980            unix and windows names.  Make sure to always store the
 981            one we actually looked up and succeeded. Have I mentioned
 982            why I hate the 'winbind use default domain' parameter?
 983                                          --jerry              */
 984
 985         *found_username = talloc_strdup( mem_ctx, real_username );
 986
 987         DEBUG(5,("fill_sam_account: located username was [%s]\n",
 988                 *found_username));
 989
 990         return pdb_init_sam_pw(sam_account, passwd);
 991 }
 992
 993 /****************************************************************************
 994  Wrapper to allow the getpwnam() call to strip the domain name and
 995  try again in case a local UNIX user is already there.  Also run through
 996  the username if we fallback to the username only.
 997  ****************************************************************************/
 998
 999 struct passwd *smb_getpwnam( char *domuser, fstring save_username, BOOL create )
1000 {
1001         struct passwd *pw = NULL;
1002         char *p;
1003         fstring username;
1004
1005         /* we only save a copy of the username it has been mangled
1006            by winbindd use default domain */
1007
1008         save_username[0] = '\0';
1009
1010         /* don't call map_username() here since it has to be done higher
1011            up the stack so we don't call it mutliple times */
1012
1013         fstrcpy( username, domuser );
1014
1015         p = strchr_m( username, *lp_winbind_separator() );
1016
1017         /* code for a DOMAIN\user string */
1018
1019         if ( p ) {
1020                 fstring strip_username;
1021
1022                 pw = Get_Pwnam( domuser );
1023                 if ( pw ) {
1024                         /* make sure we get the case of the username correct */
1025                         /* work around 'winbind use default domain = yes' */
1026
1027                         if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1028                                 char *domain;
1029
1030                                 /* split the domain and username into 2 strings */
1031                                 *p = '\0';
1032                                 domain = username;
1033
1034                                 fstr_sprintf(save_username, "%s%c%s", domain, *lp_winbind_separator(), pw->pw_name);
1035                         }
1036                         else
1037                                 fstrcpy( save_username, pw->pw_name );
1038
1039                         /* whew -- done! */
1040                         return pw;
1041                 }
1042
1043                 /* setup for lookup of just the username */
1044                 /* remember that p and username are overlapping memory */
1045
1046                 p++;
1047                 fstrcpy( strip_username, p );
1048                 fstrcpy( username, strip_username );
1049         }
1050
1051         /* just lookup a plain username */
1052
1053         pw = Get_Pwnam(username);
1054
1055         /* Create local user if requested. */
1056
1057         if ( !pw && create ) {
1058                 /* Don't add a machine account. */
1059                 if (username[strlen(username)-1] == '$')
1060                         return NULL;
1061
1062                 auth_add_user_script(NULL, username);
1063                 pw = Get_Pwnam(username);
1064         }
1065
1066         /* one last check for a valid passwd struct */
1067
1068         if ( pw )
1069                 fstrcpy( save_username, pw->pw_name );
1070
1071         return pw;
1072 }
1073
1074 /***************************************************************************
1075  Make a server_info struct from the info3 returned by a domain logon
1076 ***************************************************************************/
1077
1078 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1079                                 const char *internal_username,
1080                                 const char *sent_nt_username,
1081                                 const char *domain,
1082                                 auth_serversupplied_info **server_info,
1083                                 NET_USER_INFO_3 *info3)
1084 {
1085         static const char zeros[16];
1086
1087         NTSTATUS nt_status = NT_STATUS_OK;
1088         char *found_username;
1089         const char *nt_domain;
1090         const char *nt_username;
1091
1092         SAM_ACCOUNT *sam_account = NULL;
1093         DOM_SID user_sid;
1094         DOM_SID group_sid;
1095
1096         uid_t uid;
1097         gid_t gid;
1098
1099         int n_lgroupSIDs;
1100         DOM_SID *lgroupSIDs   = NULL;
1101
1102         gid_t *unix_groups = NULL;
1103         NT_USER_TOKEN *token;
1104
1105         DOM_SID *all_group_SIDs;
1106         size_t i;
1107
1108         /*
1109            Here is where we should check the list of
1110            trusted domains, and verify that the SID
1111            matches.
1112         */
1113
1114         sid_copy(&user_sid, &info3->dom_sid.sid);
1115         if (!sid_append_rid(&user_sid, info3->user_rid)) {
1116                 return NT_STATUS_INVALID_PARAMETER;
1117         }
1118
1119         sid_copy(&group_sid, &info3->dom_sid.sid);
1120         if (!sid_append_rid(&group_sid, info3->group_rid)) {
1121                 return NT_STATUS_INVALID_PARAMETER;
1122         }
1123
1124         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
1125                 /* If the server didn't give us one, just use the one we sent them */
1126                 nt_username = sent_nt_username;
1127         }
1128
1129         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
1130                 /* If the server didn't give us one, just use the one we sent them */
1131                 nt_domain = domain;
1132         }
1133
1134         /* try to fill the SAM account..  If getpwnam() fails, then try the
1135            add user script (2.2.x behavior).
1136
1137            We use the _unmapped_ username here in an attempt to provide
1138            consistent username mapping behavior between kerberos and NTLM[SSP]
1139            authentication in domain mode security.  I.E. Username mapping should
1140            be applied to the fully qualified username (e.g. DOMAIN\user) and
1141            no just the login name.  Yes this mean swe called map_username()
1142            unnecessarily in make_user_info_map() but that is how the current
1143            code is designed.  Making the change here is the least disruptive
1144            place.    -- jerry */
1145
1146         nt_status = fill_sam_account(mem_ctx, nt_domain, sent_nt_username,
1147                 &found_username, &uid, &gid, &sam_account);
1148
1149         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) {
1150                 DEBUG(3,("User %s does not exist, trying to add it\n", internal_username));
1151                 auth_add_user_script( nt_domain, sent_nt_username );
1152                 nt_status = fill_sam_account( mem_ctx, nt_domain, sent_nt_username,
1153                         &found_username, &uid, &gid, &sam_account );
1154         }
1155
1156         if (!NT_STATUS_IS_OK(nt_status)) {
1157                 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
1158                 return nt_status;
1159         }
1160
1161         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1162                 pdb_free_sam(&sam_account);
1163                 return NT_STATUS_NO_MEMORY;
1164         }
1165
1166         if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1167                 pdb_free_sam(&sam_account);
1168                 return NT_STATUS_NO_MEMORY;
1169         }
1170
1171         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1172                 pdb_free_sam(&sam_account);
1173                 return NT_STATUS_NO_MEMORY;
1174         }
1175
1176         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1177                 pdb_free_sam(&sam_account);
1178                 return NT_STATUS_UNSUCCESSFUL;
1179         }
1180
1181         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1182                 pdb_free_sam(&sam_account);
1183                 return NT_STATUS_UNSUCCESSFUL;
1184         }
1185
1186         if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)),
1187                               PDB_CHANGED)) {
1188                 pdb_free_sam(&sam_account);
1189                 return NT_STATUS_NO_MEMORY;
1190         }
1191
1192         if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) {
1193                 pdb_free_sam(&sam_account);
1194                 return NT_STATUS_NO_MEMORY;
1195         }
1196
1197         if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) {
1198                 pdb_free_sam(&sam_account);
1199                 return NT_STATUS_NO_MEMORY;
1200         }
1201
1202         if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) {
1203                 pdb_free_sam(&sam_account);
1204                 return NT_STATUS_NO_MEMORY;
1205         }
1206
1207         if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) {
1208                 pdb_free_sam(&sam_account);
1209                 return NT_STATUS_NO_MEMORY;
1210         }
1211
1212         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
1213                 DEBUG(4, ("make_server_info failed!\n"));
1214                 pdb_free_sam(&sam_account);
1215                 return nt_status;
1216         }
1217
1218         /* save this here to _net_sam_logon() doesn't fail (it assumes a
1219            valid SAM_ACCOUNT) */
1220
1221         (*server_info)->sam_account = sam_account;
1222
1223         (*server_info)->unix_name = smb_xstrdup(found_username);
1224
1225         /* Fill in the unix info we found on the way */
1226
1227         (*server_info)->sam_fill_level = SAM_FILL_ALL;
1228         (*server_info)->uid = uid;
1229         (*server_info)->gid = gid;
1230
1231         /* Store the user group information in the server_info
1232            returned to the caller. */
1233
1234         nt_status = get_user_groups((*server_info)->unix_name,
1235                 uid, gid, &n_lgroupSIDs, &lgroupSIDs, &unix_groups);
1236
1237         if ( !NT_STATUS_IS_OK(nt_status) ) {
1238                 DEBUG(4,("get_user_groups failed\n"));
1239                 return nt_status;
1240         }
1241
1242         (*server_info)->groups = unix_groups;
1243         (*server_info)->n_groups = n_lgroupSIDs;
1244
1245         /* Create a 'combined' list of all SIDs we might want in the SD */
1246
1247         all_group_SIDs = malloc(sizeof(DOM_SID) * (info3->num_groups2 + info3->num_other_sids + n_lgroupSIDs));
1248
1249         if (!all_group_SIDs) {
1250                 DEBUG(0, ("malloc() failed for DOM_SID list!\n"));
1251                 SAFE_FREE(lgroupSIDs);
1252                 free_server_info(server_info);
1253                 return NT_STATUS_NO_MEMORY;
1254         }
1255
1256         /* and create (by appending rids) the 'domain' sids */
1257
1258         for (i = 0; i < info3->num_groups2; i++) {
1259
1260                 sid_copy(&all_group_SIDs[i], &(info3->dom_sid.sid));
1261
1262                 if (!sid_append_rid(&all_group_SIDs[i], info3->gids[i].g_rid)) {
1263
1264                         nt_status = NT_STATUS_INVALID_PARAMETER;
1265
1266                         DEBUG(3,("could not append additional group rid 0x%x\n",
1267                                 info3->gids[i].g_rid));
1268
1269                         SAFE_FREE(lgroupSIDs);
1270                         SAFE_FREE(all_group_SIDs);
1271                         free_server_info(server_info);
1272
1273                         return nt_status;
1274
1275                 }
1276         }
1277
1278         /* Copy 'other' sids.  We need to do sid filtering here to
1279            prevent possible elevation of privileges.  See:
1280
1281            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1282          */
1283
1284         for (i = 0; i < info3->num_other_sids; i++) {
1285                 sid_copy(&all_group_SIDs[info3->num_groups2 + i],
1286                          &info3->other_sids[i].sid);
1287         }
1288
1289
1290         /* add local alias sids */
1291
1292         for (i = 0; i < n_lgroupSIDs; i++) {
1293                 sid_copy(&all_group_SIDs[info3->num_groups2 +
1294                                          info3->num_other_sids + i],
1295                          &lgroupSIDs[i]);
1296         }
1297
1298         /* Where are the 'global' sids... */
1299
1300         /* can the user be guest? if yes, where is it stored? */
1301
1302         nt_status = create_nt_user_token(&user_sid, &group_sid,
1303                 info3->num_groups2 + info3->num_other_sids + n_lgroupSIDs,
1304                 all_group_SIDs, False, &token);
1305
1306         if ( !NT_STATUS_IS_OK(nt_status) ) {
1307                 DEBUG(4,("create_nt_user_token failed\n"));
1308                 SAFE_FREE(lgroupSIDs);
1309                 SAFE_FREE(all_group_SIDs);
1310                 free_server_info(server_info);
1311                 return nt_status;
1312         }
1313
1314         (*server_info)->ptok = token;
1315
1316         SAFE_FREE(lgroupSIDs);
1317         SAFE_FREE(all_group_SIDs);
1318
1319         /* ensure we are never given NULL session keys */
1320
1321         if (memcmp(info3->user_sess_key, zeros, sizeof(zeros)) == 0) {
1322                 (*server_info)->user_session_key = data_blob(NULL, 0);
1323         } else {
1324                 (*server_info)->user_session_key = data_blob(info3->user_sess_key, sizeof(info3->user_sess_key));
1325         }
1326
1327         if (memcmp(info3->padding, zeros, sizeof(zeros)) == 0) {
1328                 (*server_info)->lm_session_key = data_blob(NULL, 0);
1329         } else {
1330                 (*server_info)->lm_session_key = data_blob(info3->padding, 16);
1331         }
1332         return NT_STATUS_OK;
1333 }
1334
1335 /***************************************************************************
1336  Free a user_info struct
1337 ***************************************************************************/
1338
1339 void free_user_info(auth_usersupplied_info **user_info)
1340 {
1341         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1342         if (*user_info != NULL) {
1343                 if ((*user_info)->smb_name.str) {
1344                         DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1345                 }
1346                 SAFE_FREE((*user_info)->smb_name.str);
1347                 SAFE_FREE((*user_info)->internal_username.str);
1348                 SAFE_FREE((*user_info)->client_domain.str);
1349                 SAFE_FREE((*user_info)->domain.str);
1350                 SAFE_FREE((*user_info)->wksta_name.str);
1351                 data_blob_free(&(*user_info)->lm_resp);
1352                 data_blob_free(&(*user_info)->nt_resp);
1353                 data_blob_clear_free(&(*user_info)->lm_interactive_pwd);
1354                 data_blob_clear_free(&(*user_info)->nt_interactive_pwd);
1355                 data_blob_clear_free(&(*user_info)->plaintext_password);
1356                 ZERO_STRUCT(**user_info);
1357         }
1358         SAFE_FREE(*user_info);
1359 }
1360
1361 /***************************************************************************
1362  Clear out a server_info struct that has been allocated
1363 ***************************************************************************/
1364
1365 void free_server_info(auth_serversupplied_info **server_info)
1366 {
1367         DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1368         if (*server_info != NULL) {
1369                 pdb_free_sam(&(*server_info)->sam_account);
1370
1371                 /* call pam_end here, unless we know we are keeping it */
1372                 delete_nt_token( &(*server_info)->ptok );
1373                 SAFE_FREE((*server_info)->groups);
1374                 SAFE_FREE((*server_info)->unix_name);
1375                 data_blob_free(&(*server_info)->lm_session_key);
1376                 data_blob_free(&(*server_info)->user_session_key);
1377                 ZERO_STRUCT(**server_info);
1378         }
1379         SAFE_FREE(*server_info);
1380 }
1381
1382 /***************************************************************************
1383  Make an auth_methods struct
1384 ***************************************************************************/
1385
1386 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1387 {
1388         if (!auth_context) {
1389                 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1390         }
1391
1392         if (!auth_method) {
1393                 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1394         }
1395
1396         *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1397         if (!*auth_method) {
1398                 DEBUG(0,("make_auth_method: malloc failed!\n"));
1399                 return False;
1400         }
1401         ZERO_STRUCTP(*auth_method);
1402
1403         return True;
1404 }
1405
1406 /****************************************************************************
1407  Delete a SID token.
1408 ****************************************************************************/
1409
1410 void delete_nt_token(NT_USER_TOKEN **pptoken)
1411 {
1412     if (*pptoken) {
1413             NT_USER_TOKEN *ptoken = *pptoken;
1414             SAFE_FREE( ptoken->user_sids );
1415             ZERO_STRUCTP(ptoken);
1416     }
1417     SAFE_FREE(*pptoken);
1418 }
1419
1420 /****************************************************************************
1421  Duplicate a SID token.
1422 ****************************************************************************/
1423
1424 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1425 {
1426         NT_USER_TOKEN *token;
1427
1428         if (!ptoken)
1429                 return NULL;
1430
1431     if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1432         return NULL;
1433
1434     ZERO_STRUCTP(token);
1435
1436     if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1437         SAFE_FREE(token);
1438         return NULL;
1439     }
1440
1441     token->num_sids = ptoken->num_sids;
1442
1443         return token;
1444 }
1445
1446 /**
1447  * Verify whether or not given domain is trusted.
1448  *
1449  * @param domain_name name of the domain to be verified
1450  * @return true if domain is one of the trusted once or
1451  *         false if otherwise
1452  **/
1453
1454 BOOL is_trusted_domain(const char* dom_name)
1455 {
1456         DOM_SID trustdom_sid;
1457         char *pass = NULL;
1458         time_t lct;
1459         BOOL ret;
1460
1461         /* no trusted domains for a standalone server */
1462
1463         if ( lp_server_role() == ROLE_STANDALONE )
1464                 return False;
1465
1466         /* if we are a DC, then check for a direct trust relationships */
1467
1468         if ( IS_DC ) {
1469                 become_root();
1470                 DEBUG (5,("is_trusted_domain: Checking for domain trust with [%s]\n",
1471                         dom_name ));
1472                 ret = secrets_fetch_trusted_domain_password(dom_name, &pass, &trustdom_sid, &lct);
1473                 unbecome_root();
1474                 SAFE_FREE(pass);
1475                 if (ret)
1476                         return True;
1477         }
1478         else {
1479                 /* if winbindd is not up and we are a domain member) then we need to update the
1480                    trustdom_cache ourselves */
1481
1482                 if ( !winbind_ping() )
1483                         update_trustdom_cache();
1484         }
1485
1486         /* now the trustdom cache should be available a DC could still
1487          * have a transitive trust so fall back to the cache of trusted
1488          * domains (like a domain member would use  */
1489
1490         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
1491                 return True;
1492         }
1493
1494         return False;
1495 }
1496