source/auth/auth_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Authentication utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Andrew Bartlett 2001
   6    Copyright (C) Jeremy Allison 2000-2001
   7    Copyright (C) Rafal Szczesniak 2002
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_AUTH
  28
  29 extern DOM_SID global_sid_World;
  30 extern DOM_SID global_sid_Network;
  31 extern DOM_SID global_sid_Builtin_Guests;
  32 extern DOM_SID global_sid_Authenticated_Users;
  33
  34
  35 /****************************************************************************
  36  Create a UNIX user on demand.
  37 ****************************************************************************/
  38
  39 static int smb_create_user(const char *domain, const char *unix_username, const char *homedir)
  40 {
  41         pstring add_script;
  42         int ret;
  43
  44         pstrcpy(add_script, lp_adduser_script());
  45         if (! *add_script)
  46                 return -1;
  47         all_string_sub(add_script, "%u", unix_username, sizeof(pstring));
  48         if (domain)
  49                 all_string_sub(add_script, "%D", domain, sizeof(pstring));
  50         if (homedir)
  51                 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
  52         ret = smbrun(add_script,NULL);
  53         DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
  54         return ret;
  55 }
  56
  57 /****************************************************************************
  58  Add and Delete UNIX users on demand, based on NTSTATUS codes.
  59  We don't care about RID's here so ignore.
  60 ****************************************************************************/
  61
  62 void auth_add_user_script(const char *domain, const char *username)
  63 {
  64         uint32 rid;
  65         /*
  66          * User validated ok against Domain controller.
  67          * If the admin wants us to try and create a UNIX
  68          * user on the fly, do so.
  69          */
  70
  71         if ( *lp_adduser_script() )
  72                 smb_create_user(domain, username, NULL);
  73         else {
  74                 DEBUG(10,("auth_add_user_script: no 'add user script'.  Asking winbindd\n"));
  75
  76                 /* should never get here is we a re a domain member running winbindd
  77                    However, a host set for 'security = server' might run winbindd for
  78                    account allocation */
  79
  80                 if ( !winbind_create_user(username, NULL) ) {
  81                         DEBUG(5,("auth_add_user_script: winbindd_create_user() failed\n"));
  82                         rid = 0;
  83                 }
  84         }
  85 }
  86
  87 /****************************************************************************
  88  Create a SAM_ACCOUNT - either by looking in the pdb, or by faking it up from
  89  unix info.
  90 ****************************************************************************/
  91
  92 NTSTATUS auth_get_sam_account(const char *user, SAM_ACCOUNT **account)
  93 {
  94         BOOL pdb_ret;
  95         NTSTATUS nt_status;
  96         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(account))) {
  97                 return nt_status;
  98         }
  99
 100         become_root();
 101         pdb_ret = pdb_getsampwnam(*account, user);
 102         unbecome_root();
 103
 104         if (!pdb_ret) {
 105
 106                 struct passwd *pass = Get_Pwnam(user);
 107                 if (!pass)
 108                         return NT_STATUS_NO_SUCH_USER;
 109
 110                 if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*account, pass))) {
 111                         return nt_status;
 112                 }
 113         }
 114         return NT_STATUS_OK;
 115 }
 116
 117 /****************************************************************************
 118  Create an auth_usersupplied_data structure
 119 ****************************************************************************/
 120
 121 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
 122                                const char *smb_name,
 123                                const char *internal_username,
 124                                const char *client_domain,
 125                                const char *domain,
 126                                const char *wksta_name,
 127                                DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
 128                                DATA_BLOB plaintext,
 129                                uint32 auth_flags, BOOL encrypted)
 130 {
 131
 132         DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
 133
 134         *user_info = malloc(sizeof(**user_info));
 135         if (!user_info) {
 136                 DEBUG(0,("malloc failed for user_info (size %lu)\n", (unsigned long)sizeof(*user_info)));
 137                 return NT_STATUS_NO_MEMORY;
 138         }
 139
 140         ZERO_STRUCTP(*user_info);
 141
 142         DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
 143
 144         (*user_info)->smb_name.str = strdup(smb_name);
 145         if ((*user_info)->smb_name.str) {
 146                 (*user_info)->smb_name.len = strlen(smb_name);
 147         } else {
 148                 free_user_info(user_info);
 149                 return NT_STATUS_NO_MEMORY;
 150         }
 151
 152         (*user_info)->internal_username.str = strdup(internal_username);
 153         if ((*user_info)->internal_username.str) {
 154                 (*user_info)->internal_username.len = strlen(internal_username);
 155         } else {
 156                 free_user_info(user_info);
 157                 return NT_STATUS_NO_MEMORY;
 158         }
 159
 160         (*user_info)->domain.str = strdup(domain);
 161         if ((*user_info)->domain.str) {
 162                 (*user_info)->domain.len = strlen(domain);
 163         } else {
 164                 free_user_info(user_info);
 165                 return NT_STATUS_NO_MEMORY;
 166         }
 167
 168         (*user_info)->client_domain.str = strdup(client_domain);
 169         if ((*user_info)->client_domain.str) {
 170                 (*user_info)->client_domain.len = strlen(client_domain);
 171         } else {
 172                 free_user_info(user_info);
 173                 return NT_STATUS_NO_MEMORY;
 174         }
 175
 176         (*user_info)->wksta_name.str = strdup(wksta_name);
 177         if ((*user_info)->wksta_name.str) {
 178                 (*user_info)->wksta_name.len = strlen(wksta_name);
 179         } else {
 180                 free_user_info(user_info);
 181                 return NT_STATUS_NO_MEMORY;
 182         }
 183
 184         DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
 185
 186         (*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length);
 187         (*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length);
 188         (*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length);
 189
 190         (*user_info)->encrypted = encrypted;
 191         (*user_info)->auth_flags = auth_flags;
 192
 193         DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
 194
 195         return NT_STATUS_OK;
 196 }
 197
 198 /****************************************************************************
 199  Create an auth_usersupplied_data structure after appropriate mapping.
 200 ****************************************************************************/
 201
 202 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
 203                             const char *smb_name,
 204                             const char *client_domain,
 205                             const char *wksta_name,
 206                             DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
 207                             DATA_BLOB plaintext,
 208                             uint32 ntlmssp_flags, BOOL encrypted)
 209 {
 210         const char *domain;
 211         fstring internal_username;
 212         fstrcpy(internal_username, smb_name);
 213         map_username(internal_username);
 214
 215         DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
 216               client_domain, smb_name, wksta_name));
 217
 218         /* don't allow "" as a domain, fixes a Win9X bug
 219            where it doens't supply a domain for logon script
 220            'net use' commands.                                 */
 221
 222         if ( *client_domain )
 223                 domain = client_domain;
 224         else
 225                 domain = lp_workgroup();
 226
 227         /* do what win2k does.  Always map unknown domains to our own
 228            and let the "passdb backend" handle unknown users. */
 229
 230         if ( !is_trusted_domain(domain) && !strequal(domain, get_global_sam_name()) )
 231                 domain = get_default_sam_name();
 232
 233         /* we know that it is a trusted domain (and we are allowing them) or it is our domain */
 234
 235         return make_user_info(user_info, smb_name, internal_username,
 236                 client_domain, domain, wksta_name, lm_pwd, nt_pwd,
 237                 plaintext, ntlmssp_flags, encrypted);
 238 }
 239
 240 /****************************************************************************
 241  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 242  Decrypt and encrypt the passwords.
 243 ****************************************************************************/
 244
 245 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
 246                                      const char *smb_name,
 247                                      const char *client_domain,
 248                                      const char *wksta_name,
 249                                      const uchar *lm_network_pwd, int lm_pwd_len,
 250                                      const uchar *nt_network_pwd, int nt_pwd_len)
 251 {
 252         BOOL ret;
 253         NTSTATUS nt_status;
 254         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
 255         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
 256         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 257         uint32 auth_flags = AUTH_FLAG_NONE;
 258
 259         if (lm_pwd_len)
 260                 auth_flags |= AUTH_FLAG_LM_RESP;
 261         if (nt_pwd_len == 24) {
 262                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 263         } else if (nt_pwd_len != 0) {
 264                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 265         }
 266
 267         nt_status = make_user_info_map(user_info,
 268                                       smb_name, client_domain,
 269                                   wksta_name,
 270                                       lm_blob, nt_blob,
 271                                       plaintext_blob,
 272                                       auth_flags, True);
 273
 274         ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 275
 276         data_blob_free(&lm_blob);
 277         data_blob_free(&nt_blob);
 278         return ret;
 279 }
 280
 281 /****************************************************************************
 282  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 283  Decrypt and encrypt the passwords.
 284 ****************************************************************************/
 285
 286 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
 287                                          const char *smb_name,
 288                                          const char *client_domain,
 289                                          const char *wksta_name,
 290                                          const uchar chal[8],
 291                                          const uchar lm_interactive_pwd[16],
 292                                          const uchar nt_interactive_pwd[16],
 293                                          const uchar *dc_sess_key)
 294 {
 295         char lm_pwd[16];
 296         char nt_pwd[16];
 297         unsigned char local_lm_response[24];
 298         unsigned char local_nt_response[24];
 299         unsigned char key[16];
 300         uint32 auth_flags = AUTH_FLAG_NONE;
 301
 302         ZERO_STRUCT(key);
 303         memcpy(key, dc_sess_key, 8);
 304
 305         if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
 306         if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
 307
 308 #ifdef DEBUG_PASSWORD
 309         DEBUG(100,("key:"));
 310         dump_data(100, (char *)key, sizeof(key));
 311
 312         DEBUG(100,("lm owf password:"));
 313         dump_data(100, lm_pwd, sizeof(lm_pwd));
 314
 315         DEBUG(100,("nt owf password:"));
 316         dump_data(100, nt_pwd, sizeof(nt_pwd));
 317 #endif
 318
 319         SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
 320         SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
 321
 322 #ifdef DEBUG_PASSWORD
 323         DEBUG(100,("decrypt of lm owf password:"));
 324         dump_data(100, lm_pwd, sizeof(lm_pwd));
 325
 326         DEBUG(100,("decrypt of nt owf password:"));
 327         dump_data(100, nt_pwd, sizeof(nt_pwd));
 328 #endif
 329
 330         SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
 331         SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
 332
 333         /* Password info paranoia */
 334         ZERO_STRUCT(lm_pwd);
 335         ZERO_STRUCT(nt_pwd);
 336         ZERO_STRUCT(key);
 337
 338         {
 339                 BOOL ret;
 340                 NTSTATUS nt_status;
 341                 DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
 342                 DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
 343                 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 344
 345                 if (lm_interactive_pwd)
 346                         auth_flags |= AUTH_FLAG_LM_RESP;
 347                 if (nt_interactive_pwd)
 348                         auth_flags |= AUTH_FLAG_NTLM_RESP;
 349
 350                 nt_status = make_user_info_map(user_info,
 351                                                smb_name, client_domain,
 352                                                wksta_name,
 353                                                local_lm_blob,
 354                                                local_nt_blob,
 355                                                plaintext_blob,
 356                                                auth_flags, True);
 357
 358                 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 359                 data_blob_free(&local_lm_blob);
 360                 data_blob_free(&local_nt_blob);
 361                 return ret;
 362         }
 363 }
 364
 365
 366 /****************************************************************************
 367  Create an auth_usersupplied_data structure
 368 ****************************************************************************/
 369
 370 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
 371                               const char *smb_name,
 372                               const char *client_domain,
 373                               const uint8 chal[8],
 374                               DATA_BLOB plaintext_password)
 375 {
 376
 377         DATA_BLOB local_lm_blob;
 378         DATA_BLOB local_nt_blob;
 379         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 380         uint32 auth_flags = AUTH_FLAG_NONE;
 381
 382         /*
 383          * Not encrypted - do so.
 384          */
 385
 386         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n"));
 387
 388         if (plaintext_password.data) {
 389                 unsigned char local_lm_response[24];
 390
 391 #ifdef DEBUG_PASSWORD
 392                 DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length));
 393                 dump_data(100, plaintext_password.data, plaintext_password.length);
 394 #endif
 395
 396                 SMBencrypt( (const char *)plaintext_password.data, (const uchar*)chal, local_lm_response);
 397                 local_lm_blob = data_blob(local_lm_response, 24);
 398
 399                 /* We can't do an NT hash here, as the password needs to be
 400                    case insensitive */
 401                 local_nt_blob = data_blob(NULL, 0);
 402
 403                 auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP);
 404         } else {
 405                 local_lm_blob = data_blob(NULL, 0);
 406                 local_nt_blob = data_blob(NULL, 0);
 407         }
 408
 409         ret = make_user_info_map(user_info, smb_name,
 410                                  client_domain,
 411                                  get_remote_machine_name(),
 412                                  local_lm_blob,
 413                                  local_nt_blob,
 414                                  plaintext_password,
 415                                  auth_flags, False);
 416
 417         data_blob_free(&local_lm_blob);
 418         return NT_STATUS_IS_OK(ret) ? True : False;
 419 }
 420
 421 /****************************************************************************
 422  Create an auth_usersupplied_data structure
 423 ****************************************************************************/
 424
 425 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
 426                                       const char *smb_name,
 427                                       const char *client_domain,
 428                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 429 {
 430         uint32 auth_flags = AUTH_FLAG_NONE;
 431
 432         DATA_BLOB no_plaintext_blob = data_blob(NULL, 0);
 433
 434         if (lm_resp.length == 24) {
 435                 auth_flags |= AUTH_FLAG_LM_RESP;
 436         }
 437         if (nt_resp.length == 0) {
 438         } else if (nt_resp.length == 24) {
 439                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 440         } else {
 441                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 442         }
 443
 444         return make_user_info_map(user_info, smb_name,
 445                                  client_domain,
 446                                  get_remote_machine_name(),
 447                                  lm_resp,
 448                                  nt_resp,
 449                                  no_plaintext_blob,
 450                                  auth_flags, True);
 451 }
 452
 453 /****************************************************************************
 454  Create a guest user_info blob, for anonymous authenticaion.
 455 ****************************************************************************/
 456
 457 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
 458 {
 459         DATA_BLOB lm_blob = data_blob(NULL, 0);
 460         DATA_BLOB nt_blob = data_blob(NULL, 0);
 461         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 462         uint32 auth_flags = AUTH_FLAG_NONE;
 463         NTSTATUS nt_status;
 464
 465         nt_status = make_user_info(user_info,
 466                               "","",
 467                               "","",
 468                               "",
 469                               nt_blob, lm_blob,
 470                               plaintext_blob,
 471                               auth_flags, True);
 472
 473         return NT_STATUS_IS_OK(nt_status) ? True : False;
 474 }
 475
 476 /****************************************************************************
 477  prints a NT_USER_TOKEN to debug output.
 478 ****************************************************************************/
 479
 480 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
 481 {
 482         fstring sid_str;
 483         size_t     i;
 484
 485         if (!token) {
 486                 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
 487                 return;
 488         }
 489
 490         DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n",
 491                                     sid_to_string(sid_str, &token->user_sids[0]) ));
 492         DEBUGADDC(dbg_class, dbg_lev, ("contains %lu SIDs\n", (unsigned long)token->num_sids));
 493         for (i = 0; i < token->num_sids; i++)
 494                 DEBUGADDC(dbg_class, dbg_lev, ("SID[%3lu]: %s\n", (unsigned long)i,
 495                                                sid_to_string(sid_str, &token->user_sids[i])));
 496 }
 497
 498 /****************************************************************************
 499  prints a UNIX 'token' to debug output.
 500 ****************************************************************************/
 501
 502 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid, int n_groups, gid_t *groups)
 503 {
 504         int     i;
 505         DEBUGC(dbg_class, dbg_lev, ("UNIX token of user %ld\n", (long int)uid));
 506
 507         DEBUGADDC(dbg_class, dbg_lev, ("Primary group is %ld and contains %i supplementary groups\n", (long int)gid, n_groups));
 508         for (i = 0; i < n_groups; i++)
 509                 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
 510                         (long int)groups[i]));
 511 }
 512
 513 /****************************************************************************
 514  Create the SID list for this user.
 515 ****************************************************************************/
 516
 517 static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid,
 518                                      int n_groupSIDs, DOM_SID *groupSIDs,
 519                                      BOOL is_guest, NT_USER_TOKEN **token)
 520 {
 521         NTSTATUS       nt_status = NT_STATUS_OK;
 522         NT_USER_TOKEN *ptoken;
 523         int i;
 524         int sid_ndx;
 525
 526         if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
 527                 DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
 528                 nt_status = NT_STATUS_NO_MEMORY;
 529                 return nt_status;
 530         }
 531
 532         ZERO_STRUCTP(ptoken);
 533
 534         ptoken->num_sids = n_groupSIDs + 5;
 535
 536         if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
 537                 DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
 538                 nt_status = NT_STATUS_NO_MEMORY;
 539                 return nt_status;
 540         }
 541
 542         memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
 543
 544         /*
 545          * Note - user SID *MUST* be first in token !
 546          * se_access_check depends on this.
 547          *
 548          * Primary group SID is second in token. Convention.
 549          */
 550
 551         sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
 552         if (group_sid)
 553                 sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
 554
 555         /*
 556          * Finally add the "standard" SIDs.
 557          * The only difference between guest and "anonymous" (which we
 558          * don't really support) is the addition of Authenticated_Users.
 559          */
 560
 561         sid_copy(&ptoken->user_sids[2], &global_sid_World);
 562         sid_copy(&ptoken->user_sids[3], &global_sid_Network);
 563
 564         if (is_guest)
 565                 sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
 566         else
 567                 sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
 568
 569         sid_ndx = 5; /* next available spot */
 570
 571         for (i = 0; i < n_groupSIDs; i++) {
 572                 size_t check_sid_idx;
 573                 for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
 574                         if (sid_equal(&ptoken->user_sids[check_sid_idx],
 575                                       &groupSIDs[i])) {
 576                                 break;
 577                         }
 578                 }
 579
 580                 if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
 581                         sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
 582                 } else {
 583                         ptoken->num_sids--;
 584                 }
 585         }
 586
 587         debug_nt_user_token(DBGC_AUTH, 10, ptoken);
 588
 589         *token = ptoken;
 590
 591         return nt_status;
 592 }
 593
 594 /****************************************************************************
 595  Create the SID list for this user.
 596 ****************************************************************************/
 597
 598 NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
 599 {
 600         DOM_SID user_sid;
 601         DOM_SID group_sid;
 602         DOM_SID *group_sids;
 603         NT_USER_TOKEN *token;
 604         int i;
 605
 606         if (!NT_STATUS_IS_OK(uid_to_sid(&user_sid, uid))) {
 607                 return NULL;
 608         }
 609         if (!NT_STATUS_IS_OK(gid_to_sid(&group_sid, gid))) {
 610                 return NULL;
 611         }
 612
 613         group_sids = malloc(sizeof(DOM_SID) * ngroups);
 614         if (!group_sids) {
 615                 DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
 616                 return NULL;
 617         }
 618
 619         for (i = 0; i < ngroups; i++) {
 620                 if (!NT_STATUS_IS_OK(gid_to_sid(&(group_sids)[i], (groups)[i]))) {
 621                         DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
 622                         SAFE_FREE(group_sids);
 623                         return NULL;
 624                 }
 625         }
 626
 627         if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid,
 628                                                   ngroups, group_sids, is_guest, &token))) {
 629                 SAFE_FREE(group_sids);
 630                 return NULL;
 631         }
 632
 633         SAFE_FREE(group_sids);
 634
 635         return token;
 636 }
 637
 638 static void add_gid_to_array_unique(gid_t gid, gid_t **groups, int *ngroups)
 639 {
 640         int i;
 641
 642         if ((*ngroups) >= groups_max())
 643                 return;
 644
 645         for (i=0; i<*ngroups; i++) {
 646                 if ((*groups)[i] == gid)
 647                         return;
 648         }
 649
 650         *groups = Realloc(*groups, ((*ngroups)+1) * sizeof(gid_t));
 651
 652         if (*groups == NULL)
 653                 return;
 654
 655         (*groups)[*ngroups] = gid;
 656         *ngroups += 1;
 657 }
 658
 659 static void add_foreign_gids_from_sid(const DOM_SID *sid, gid_t **groups,
 660                                       int *ngroups)
 661 {
 662         DOM_SID *aliases;
 663         int j, num_aliases;
 664
 665         if (!pdb_enum_alias_memberships(sid, &aliases, &num_aliases))
 666                 return;
 667
 668         for (j=0; j<num_aliases; j++) {
 669                 gid_t gid;
 670
 671                 if (!NT_STATUS_IS_OK(sid_to_gid(&aliases[j], &gid)))
 672                         continue;
 673
 674                 add_gid_to_array_unique(gid, groups, ngroups);
 675         }
 676         SAFE_FREE(aliases);
 677 }
 678
 679 static void add_foreign_gids(uid_t uid, gid_t gid,
 680                              gid_t **groups, int *ngroups)
 681 {
 682         int i, dom_groups;
 683         DOM_SID sid;
 684
 685         if (NT_STATUS_IS_OK(uid_to_sid(&sid, uid)))
 686                 add_foreign_gids_from_sid(&sid, groups, ngroups);
 687
 688         if (NT_STATUS_IS_OK(gid_to_sid(&sid, gid)))
 689                 add_foreign_gids_from_sid(&sid, groups, ngroups);
 690
 691         dom_groups = *ngroups;
 692
 693         for (i=0; i<dom_groups; i++) {
 694
 695                 if (!NT_STATUS_IS_OK(gid_to_sid(&sid, (*groups)[i])))
 696                         continue;
 697
 698                 add_foreign_gids_from_sid(&sid, groups, ngroups);
 699         }
 700 }
 701
 702 /******************************************************************************
 703  * this function returns the groups (SIDs) of the local SAM the user is in.
 704  * If this samba server is a DC of the domain the user belongs to, it returns
 705  * both domain groups and local / builtin groups. If the user is in a trusted
 706  * domain, or samba is a member server of a domain, then this function returns
 707  * local and builtin groups the user is a member of.
 708  *
 709  * currently this is a hack, as there is no sam implementation that is capable
 710  * of groups.
 711  *
 712  * NOTE!! This function will fail if you pass in a winbind user without
 713  * the domain   --jerry
 714  ******************************************************************************/
 715
 716 static NTSTATUS get_user_groups(const char *username, uid_t uid, gid_t gid,
 717                                 int *n_groups, DOM_SID **groups, gid_t **unix_groups)
 718 {
 719         int             n_unix_groups;
 720         int             i;
 721
 722         *n_groups = 0;
 723         *groups   = NULL;
 724
 725         /* Try winbind first */
 726
 727         if ( strchr(username, *lp_winbind_separator()) ) {
 728                 n_unix_groups = winbind_getgroups( username, unix_groups );
 729
 730                 DEBUG(10,("get_user_groups: winbind_getgroups(%s): result = %s\n", username,
 731                           n_unix_groups == -1 ? "FAIL" : "SUCCESS"));
 732
 733                 if ( n_unix_groups == -1 )
 734                         return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
 735         }
 736         else {
 737                 /* fallback to getgrouplist() */
 738
 739                 n_unix_groups = groups_max();
 740
 741                 if ((*unix_groups = malloc( sizeof(gid_t) * n_unix_groups ) ) == NULL) {
 742                         DEBUG(0, ("get_user_groups: Out of memory allocating unix group list\n"));
 743                         return NT_STATUS_NO_MEMORY;
 744                 }
 745
 746                 if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) {
 747
 748                         gid_t *groups_tmp;
 749
 750                         groups_tmp = Realloc(*unix_groups, sizeof(gid_t) * n_unix_groups);
 751
 752                         if (!groups_tmp) {
 753                                 SAFE_FREE(*unix_groups);
 754                                 return NT_STATUS_NO_MEMORY;
 755                         }
 756                         *unix_groups = groups_tmp;
 757
 758                         if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) {
 759                                 DEBUG(0, ("get_user_groups: failed to get the unix group list\n"));
 760                                 SAFE_FREE(*unix_groups);
 761                                 return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
 762                         }
 763                 }
 764         }
 765
 766         add_foreign_gids(uid, gid, unix_groups, &n_unix_groups);
 767
 768         debug_unix_user_token(DBGC_CLASS, 5, uid, gid, n_unix_groups, *unix_groups);
 769
 770         /* now setup the space for storing the SIDS */
 771
 772         if (n_unix_groups > 0) {
 773
 774                 *groups   = malloc(sizeof(DOM_SID) * n_unix_groups);
 775
 776                 if (!*groups) {
 777                         DEBUG(0, ("get_user_group: malloc() failed for DOM_SID list!\n"));
 778                         SAFE_FREE(*unix_groups);
 779                         return NT_STATUS_NO_MEMORY;
 780                 }
 781         }
 782
 783         *n_groups = n_unix_groups;
 784
 785         for (i = 0; i < *n_groups; i++) {
 786                 if (!NT_STATUS_IS_OK(gid_to_sid(&(*groups)[i], (*unix_groups)[i]))) {
 787                         DEBUG(1, ("get_user_groups: failed to convert gid %ld to a sid!\n",
 788                                 (long int)(*unix_groups)[i+1]));
 789                         SAFE_FREE(*groups);
 790                         SAFE_FREE(*unix_groups);
 791                         return NT_STATUS_NO_SUCH_USER;
 792                 }
 793         }
 794
 795         return NT_STATUS_OK;
 796 }
 797
 798 /***************************************************************************
 799  Make a user_info struct
 800 ***************************************************************************/
 801
 802 static NTSTATUS make_server_info(auth_serversupplied_info **server_info)
 803 {
 804         *server_info = malloc(sizeof(**server_info));
 805         if (!*server_info) {
 806                 DEBUG(0,("make_server_info: malloc failed!\n"));
 807                 return NT_STATUS_NO_MEMORY;
 808         }
 809         ZERO_STRUCTP(*server_info);
 810
 811         /* Initialise the uid and gid values to something non-zero
 812            which may save us from giving away root access if there
 813            is a bug in allocating these fields. */
 814
 815         (*server_info)->uid = -1;
 816         (*server_info)->gid = -1;
 817
 818         return NT_STATUS_OK;
 819 }
 820
 821 /***************************************************************************
 822 Fill a server_info struct from a SAM_ACCOUNT with their groups
 823 ***************************************************************************/
 824
 825 static NTSTATUS add_user_groups(auth_serversupplied_info **server_info,
 826                                 SAM_ACCOUNT *sampass,
 827                                 uid_t uid, gid_t gid)
 828 {
 829         NTSTATUS nt_status;
 830         const DOM_SID *user_sid = pdb_get_user_sid(sampass);
 831         const DOM_SID *group_sid = pdb_get_group_sid(sampass);
 832         int       n_groupSIDs = 0;
 833         DOM_SID  *groupSIDs   = NULL;
 834         gid_t    *unix_groups = NULL;
 835         NT_USER_TOKEN *token;
 836         BOOL is_guest;
 837         uint32 rid;
 838
 839         nt_status = get_user_groups(pdb_get_username(sampass), uid, gid,
 840                 &n_groupSIDs, &groupSIDs, &unix_groups);
 841
 842         if (!NT_STATUS_IS_OK(nt_status)) {
 843                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
 844                 free_server_info(server_info);
 845                 return nt_status;
 846         }
 847
 848         is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
 849
 850         if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
 851                                                               n_groupSIDs, groupSIDs, is_guest,
 852                                                               &token)))
 853         {
 854                 DEBUG(4,("create_nt_user_token failed\n"));
 855                 SAFE_FREE(groupSIDs);
 856                 SAFE_FREE(unix_groups);
 857                 free_server_info(server_info);
 858                 return nt_status;
 859         }
 860
 861         SAFE_FREE(groupSIDs);
 862
 863         (*server_info)->n_groups = n_groupSIDs;
 864         (*server_info)->groups = unix_groups;
 865         (*server_info)->ptok = token;
 866
 867         return nt_status;
 868 }
 869
 870 /***************************************************************************
 871  Make (and fill) a user_info struct from a SAM_ACCOUNT
 872 ***************************************************************************/
 873
 874 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
 875                               SAM_ACCOUNT *sampass)
 876 {
 877         NTSTATUS nt_status;
 878         struct passwd *pwd;
 879
 880         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info)))
 881                 return nt_status;
 882
 883         (*server_info)->sam_account    = sampass;
 884
 885         if ( !(pwd = getpwnam_alloc(pdb_get_username(sampass))) )  {
 886                 DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
 887                           pdb_get_username(sampass)));
 888                 free_server_info(server_info);
 889                 return NT_STATUS_NO_SUCH_USER;
 890         }
 891         (*server_info)->unix_name = smb_xstrdup(pwd->pw_name);
 892         (*server_info)->gid = pwd->pw_gid;
 893         (*server_info)->uid = pwd->pw_uid;
 894
 895         passwd_free(&pwd);
 896
 897         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, sampass,
 898                                                          (*server_info)->uid,
 899                                                          (*server_info)->gid))) {
 900                 free_server_info(server_info);
 901                 return nt_status;
 902         }
 903
 904         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 905         DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
 906                  pdb_get_username(sampass),
 907                  (*server_info)->unix_name));
 908
 909         return nt_status;
 910 }
 911
 912 /***************************************************************************
 913  Make (and fill) a user_info struct from a 'struct passwd' by conversion
 914  to a SAM_ACCOUNT
 915 ***************************************************************************/
 916
 917 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
 918 {
 919         NTSTATUS nt_status;
 920         SAM_ACCOUNT *sampass = NULL;
 921         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
 922                 return nt_status;
 923         }
 924         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
 925                 return nt_status;
 926         }
 927
 928         (*server_info)->sam_account    = sampass;
 929
 930         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, sampass, pwd->pw_uid, pwd->pw_gid))) {
 931                 return nt_status;
 932         }
 933
 934         (*server_info)->unix_name = smb_xstrdup(pwd->pw_name);
 935
 936         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 937         (*server_info)->uid = pwd->pw_uid;
 938         (*server_info)->gid = pwd->pw_gid;
 939         return nt_status;
 940 }
 941
 942 /***************************************************************************
 943  Make (and fill) a user_info struct for a guest login.
 944 ***************************************************************************/
 945
 946 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
 947 {
 948         NTSTATUS nt_status;
 949         SAM_ACCOUNT *sampass = NULL;
 950         DOM_SID guest_sid;
 951
 952         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
 953                 return nt_status;
 954         }
 955
 956         sid_copy(&guest_sid, get_global_sam_sid());
 957         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
 958
 959         become_root();
 960         if (!pdb_getsampwsid(sampass, &guest_sid)) {
 961                 unbecome_root();
 962                 return NT_STATUS_NO_SUCH_USER;
 963         }
 964         unbecome_root();
 965
 966         nt_status = make_server_info_sam(server_info, sampass);
 967
 968         if (NT_STATUS_IS_OK(nt_status)) {
 969                 static const char zeros[16];
 970                 (*server_info)->guest = True;
 971
 972                 /* annoying, but the Guest really does have a session key,
 973                    and it is all zeros! */
 974                 (*server_info)->nt_session_key = data_blob(zeros, sizeof(zeros));
 975                 (*server_info)->lm_session_key = data_blob(zeros, sizeof(zeros));
 976         }
 977
 978         return nt_status;
 979 }
 980
 981 /***************************************************************************
 982  Purely internal function for make_server_info_info3
 983  Fill the sam account from getpwnam
 984 ***************************************************************************/
 985 static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx,
 986                                  const char *domain,
 987                                  const char *username,
 988                                  char **found_username,
 989                                  uid_t *uid, gid_t *gid,
 990                                  SAM_ACCOUNT **sam_account)
 991 {
 992         fstring dom_user;
 993         struct passwd *passwd;
 994
 995         fstr_sprintf(dom_user, "%s%s%s", domain, lp_winbind_separator(),
 996                 username);
 997
 998         passwd = Get_Pwnam(dom_user);
 999
1000         if ( passwd ) {
1001                 char *p;
1002
1003                 /* make sure we get the case of the username correct */
1004                 /* work around 'winbind use default domain = yes' */
1005
1006                 p = strchr( passwd->pw_name, *lp_winbind_separator() );
1007                 if ( !p )
1008                         fstr_sprintf(dom_user, "%s%s%s", domain,
1009                                 lp_winbind_separator(), passwd->pw_name);
1010                 else
1011                         fstrcpy( dom_user, passwd->pw_name );
1012         }
1013         else {
1014                 /* if the lookup for DOMAIN\username failed, try again
1015                    with just 'username'.  This is need for accessing the server
1016                    as a trust user that actually maps to a local account */
1017
1018                 fstrcpy( dom_user, username );
1019                 passwd = Get_Pwnam( dom_user );
1020
1021                 /* make sure we get the case of the username correct */
1022                 if ( passwd )
1023                         fstrcpy( dom_user, passwd->pw_name );
1024         }
1025
1026         if ( !passwd )
1027                 return NT_STATUS_NO_SUCH_USER;
1028
1029         *uid = passwd->pw_uid;
1030         *gid = passwd->pw_gid;
1031
1032         /* This is pointless -- there is no suport for differeing
1033            unix and windows names.  Make sure to always store the
1034            one we actually looked up and succeeded. Have I mentioned
1035            why I hate the 'winbind use default domain' parameter?
1036                                          --jerry              */
1037
1038         *found_username = talloc_strdup(mem_ctx, dom_user);
1039
1040         DEBUG(5,("fill_sam_account: located username was [%s]\n",
1041                 *found_username));
1042
1043         return pdb_init_sam_pw(sam_account, passwd);
1044 }
1045
1046 /****************************************************************************
1047  Wrapper to allow the getpwnam() call to strip the domain name and
1048  try again in case a local UNIX user is already there.  Also run through
1049  the username if we fallback to the username only.
1050  ****************************************************************************/
1051
1052 struct passwd *smb_getpwnam( char *domuser )
1053 {
1054         struct passwd *pw = NULL;
1055         char *p;
1056         fstring mapped_username;
1057
1058         pw = Get_Pwnam( domuser );
1059         if ( pw )
1060                 return pw;
1061
1062         /* fallback to looking up just the username */
1063
1064         p = strchr( domuser, *lp_winbind_separator() );
1065
1066         if ( p ) {
1067                 p += 1;
1068                 fstrcpy( mapped_username, p );
1069                 map_username( mapped_username );
1070                 pw = Get_Pwnam(mapped_username);
1071                 if (!pw) {
1072                         /* Don't add a machine account. */
1073                         if (mapped_username[strlen(mapped_username)-1] == '$')
1074                                 return NULL;
1075
1076                         /* Create local user if requested. */
1077                         p = strchr( mapped_username, *lp_winbind_separator() );
1078                         if (p)
1079                                 p += 1;
1080                         else
1081                                 p = mapped_username;
1082                         auth_add_user_script(NULL, p);
1083                         return Get_Pwnam(p);
1084                 }
1085         }
1086
1087         return pw;
1088 }
1089
1090 /***************************************************************************
1091  Make a server_info struct from the info3 returned by a domain logon
1092 ***************************************************************************/
1093
1094 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1095                                 const char *internal_username,
1096                                 const char *sent_nt_username,
1097                                 const char *domain,
1098                                 auth_serversupplied_info **server_info,
1099                                 NET_USER_INFO_3 *info3)
1100 {
1101         static const char zeros[16];
1102
1103         NTSTATUS nt_status = NT_STATUS_OK;
1104         char *found_username;
1105         const char *nt_domain;
1106         const char *nt_username;
1107
1108         SAM_ACCOUNT *sam_account = NULL;
1109         DOM_SID user_sid;
1110         DOM_SID group_sid;
1111
1112         uid_t uid;
1113         gid_t gid;
1114
1115         int n_lgroupSIDs;
1116         DOM_SID *lgroupSIDs   = NULL;
1117
1118         gid_t *unix_groups = NULL;
1119         NT_USER_TOKEN *token;
1120
1121         DOM_SID *all_group_SIDs;
1122         size_t i;
1123
1124         /*
1125            Here is where we should check the list of
1126            trusted domains, and verify that the SID
1127            matches.
1128         */
1129
1130         sid_copy(&user_sid, &info3->dom_sid.sid);
1131         if (!sid_append_rid(&user_sid, info3->user_rid)) {
1132                 return NT_STATUS_INVALID_PARAMETER;
1133         }
1134
1135         sid_copy(&group_sid, &info3->dom_sid.sid);
1136         if (!sid_append_rid(&group_sid, info3->group_rid)) {
1137                 return NT_STATUS_INVALID_PARAMETER;
1138         }
1139
1140         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
1141                 /* If the server didn't give us one, just use the one we sent them */
1142                 nt_username = sent_nt_username;
1143         }
1144
1145         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
1146                 /* If the server didn't give us one, just use the one we sent them */
1147                 nt_domain = domain;
1148         }
1149
1150         /* try to fill the SAM account..  If getpwnam() fails, then try the
1151            add user script (2.2.x behavior) */
1152
1153         nt_status = fill_sam_account(mem_ctx, nt_domain, internal_username,
1154                 &found_username, &uid, &gid, &sam_account);
1155
1156         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) {
1157                 DEBUG(3,("User %s does not exist, trying to add it\n",
1158                         internal_username));
1159                 auth_add_user_script(nt_domain, internal_username);
1160                 nt_status = fill_sam_account(mem_ctx, nt_domain,
1161                         internal_username, &found_username,
1162                         &uid, &gid, &sam_account);
1163         }
1164
1165         if (!NT_STATUS_IS_OK(nt_status)) {
1166                 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
1167                 return nt_status;
1168         }
1169
1170         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1171                 pdb_free_sam(&sam_account);
1172                 return NT_STATUS_NO_MEMORY;
1173         }
1174
1175         if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
1176                 pdb_free_sam(&sam_account);
1177                 return NT_STATUS_NO_MEMORY;
1178         }
1179
1180         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1181                 pdb_free_sam(&sam_account);
1182                 return NT_STATUS_NO_MEMORY;
1183         }
1184
1185         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1186                 pdb_free_sam(&sam_account);
1187                 return NT_STATUS_UNSUCCESSFUL;
1188         }
1189
1190         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1191                 pdb_free_sam(&sam_account);
1192                 return NT_STATUS_UNSUCCESSFUL;
1193         }
1194
1195         if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)),
1196                               PDB_CHANGED)) {
1197                 pdb_free_sam(&sam_account);
1198                 return NT_STATUS_NO_MEMORY;
1199         }
1200
1201         if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) {
1202                 pdb_free_sam(&sam_account);
1203                 return NT_STATUS_NO_MEMORY;
1204         }
1205
1206         if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) {
1207                 pdb_free_sam(&sam_account);
1208                 return NT_STATUS_NO_MEMORY;
1209         }
1210
1211         if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) {
1212                 pdb_free_sam(&sam_account);
1213                 return NT_STATUS_NO_MEMORY;
1214         }
1215
1216         if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) {
1217                 pdb_free_sam(&sam_account);
1218                 return NT_STATUS_NO_MEMORY;
1219         }
1220
1221         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
1222                 DEBUG(4, ("make_server_info failed!\n"));
1223                 pdb_free_sam(&sam_account);
1224                 return nt_status;
1225         }
1226
1227         /* save this here to _net_sam_logon() doesn't fail (it assumes a
1228            valid SAM_ACCOUNT) */
1229
1230         (*server_info)->sam_account = sam_account;
1231
1232         (*server_info)->unix_name = smb_xstrdup(found_username);
1233
1234         /* Fill in the unix info we found on the way */
1235
1236         (*server_info)->sam_fill_level = SAM_FILL_ALL;
1237         (*server_info)->uid = uid;
1238         (*server_info)->gid = gid;
1239
1240         /* Store the user group information in the server_info
1241            returned to the caller. */
1242
1243         nt_status = get_user_groups((*server_info)->unix_name,
1244                 uid, gid, &n_lgroupSIDs, &lgroupSIDs, &unix_groups);
1245
1246         if ( !NT_STATUS_IS_OK(nt_status) ) {
1247                 DEBUG(4,("get_user_groups failed\n"));
1248                 return nt_status;
1249         }
1250
1251         (*server_info)->groups = unix_groups;
1252         (*server_info)->n_groups = n_lgroupSIDs;
1253
1254         /* Create a 'combined' list of all SIDs we might want in the SD */
1255
1256         all_group_SIDs = malloc(sizeof(DOM_SID) * (info3->num_groups2 +info3->num_other_sids));
1257
1258         if (!all_group_SIDs) {
1259                 DEBUG(0, ("malloc() failed for DOM_SID list!\n"));
1260                 SAFE_FREE(lgroupSIDs);
1261                 free_server_info(server_info);
1262                 return NT_STATUS_NO_MEMORY;
1263         }
1264
1265 #if 0   /* JERRY -- no such thing as local groups in current code */
1266         /* Copy the 'local' sids */
1267         memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
1268         SAFE_FREE(lgroupSIDs);
1269 #endif
1270
1271         /* and create (by appending rids) the 'domain' sids */
1272
1273         for (i = 0; i < info3->num_groups2; i++) {
1274
1275                 sid_copy(&all_group_SIDs[i], &(info3->dom_sid.sid));
1276
1277                 if (!sid_append_rid(&all_group_SIDs[i], info3->gids[i].g_rid)) {
1278
1279                         nt_status = NT_STATUS_INVALID_PARAMETER;
1280
1281                         DEBUG(3,("could not append additional group rid 0x%x\n",
1282                                 info3->gids[i].g_rid));
1283
1284                         SAFE_FREE(lgroupSIDs);
1285                         free_server_info(server_info);
1286
1287                         return nt_status;
1288
1289                 }
1290         }
1291
1292         /* Copy 'other' sids.  We need to do sid filtering here to
1293            prevent possible elevation of privileges.  See:
1294
1295            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1296          */
1297
1298         for (i = 0; i < info3->num_other_sids; i++) {
1299                 sid_copy(&all_group_SIDs[info3->num_groups2 + i],
1300                          &info3->other_sids[i].sid);
1301         }
1302
1303         /* Where are the 'global' sids... */
1304
1305         /* can the user be guest? if yes, where is it stored? */
1306
1307         nt_status = create_nt_user_token(&user_sid, &group_sid,
1308                 info3->num_groups2 + info3->num_other_sids,
1309                 all_group_SIDs, False, &token);
1310
1311         if ( !NT_STATUS_IS_OK(nt_status) ) {
1312                 DEBUG(4,("create_nt_user_token failed\n"));
1313                 SAFE_FREE(all_group_SIDs);
1314                 free_server_info(server_info);
1315                 return nt_status;
1316         }
1317
1318         (*server_info)->ptok = token;
1319
1320         SAFE_FREE(all_group_SIDs);
1321
1322         /* ensure we are never given NULL session keys */
1323
1324         if (memcmp(info3->user_sess_key, zeros, sizeof(zeros)) == 0) {
1325                 (*server_info)->nt_session_key = data_blob(NULL, 0);
1326         } else {
1327                 (*server_info)->nt_session_key = data_blob(info3->user_sess_key, sizeof(info3->user_sess_key));
1328         }
1329
1330         if (memcmp(info3->padding, zeros, sizeof(zeros)) == 0) {
1331                 (*server_info)->lm_session_key = data_blob(NULL, 0);
1332         } else {
1333                 (*server_info)->lm_session_key = data_blob(info3->padding, 16);
1334         }
1335         return NT_STATUS_OK;
1336 }
1337
1338 /***************************************************************************
1339  Free a user_info struct
1340 ***************************************************************************/
1341
1342 void free_user_info(auth_usersupplied_info **user_info)
1343 {
1344         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1345         if (*user_info != NULL) {
1346                 if ((*user_info)->smb_name.str) {
1347                         DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1348                 }
1349                 SAFE_FREE((*user_info)->smb_name.str);
1350                 SAFE_FREE((*user_info)->internal_username.str);
1351                 SAFE_FREE((*user_info)->client_domain.str);
1352                 SAFE_FREE((*user_info)->domain.str);
1353                 SAFE_FREE((*user_info)->wksta_name.str);
1354                 data_blob_free(&(*user_info)->lm_resp);
1355                 data_blob_free(&(*user_info)->nt_resp);
1356                 SAFE_FREE((*user_info)->interactive_password);
1357                 data_blob_clear_free(&(*user_info)->plaintext_password);
1358                 ZERO_STRUCT(**user_info);
1359         }
1360         SAFE_FREE(*user_info);
1361 }
1362
1363 /***************************************************************************
1364  Clear out a server_info struct that has been allocated
1365 ***************************************************************************/
1366
1367 void free_server_info(auth_serversupplied_info **server_info)
1368 {
1369         DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1370         if (*server_info != NULL) {
1371                 pdb_free_sam(&(*server_info)->sam_account);
1372
1373                 /* call pam_end here, unless we know we are keeping it */
1374                 delete_nt_token( &(*server_info)->ptok );
1375                 SAFE_FREE((*server_info)->groups);
1376                 SAFE_FREE((*server_info)->unix_name);
1377                 data_blob_free(&(*server_info)->lm_session_key);
1378                 data_blob_free(&(*server_info)->nt_session_key);
1379                 ZERO_STRUCT(**server_info);
1380         }
1381         SAFE_FREE(*server_info);
1382 }
1383
1384 /***************************************************************************
1385  Make an auth_methods struct
1386 ***************************************************************************/
1387
1388 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1389 {
1390         if (!auth_context) {
1391                 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1392         }
1393
1394         if (!auth_method) {
1395                 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1396         }
1397
1398         *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1399         if (!*auth_method) {
1400                 DEBUG(0,("make_auth_method: malloc failed!\n"));
1401                 return False;
1402         }
1403         ZERO_STRUCTP(*auth_method);
1404
1405         return True;
1406 }
1407
1408 /****************************************************************************
1409  Delete a SID token.
1410 ****************************************************************************/
1411
1412 void delete_nt_token(NT_USER_TOKEN **pptoken)
1413 {
1414     if (*pptoken) {
1415             NT_USER_TOKEN *ptoken = *pptoken;
1416             SAFE_FREE( ptoken->user_sids );
1417             ZERO_STRUCTP(ptoken);
1418     }
1419     SAFE_FREE(*pptoken);
1420 }
1421
1422 /****************************************************************************
1423  Duplicate a SID token.
1424 ****************************************************************************/
1425
1426 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1427 {
1428         NT_USER_TOKEN *token;
1429
1430         if (!ptoken)
1431                 return NULL;
1432
1433     if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1434         return NULL;
1435
1436     ZERO_STRUCTP(token);
1437
1438     if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1439         SAFE_FREE(token);
1440         return NULL;
1441     }
1442
1443     token->num_sids = ptoken->num_sids;
1444
1445         return token;
1446 }
1447
1448 /**
1449  * Squash an NT_STATUS in line with security requirements.
1450  * In an attempt to avoid giving the whole game away when users
1451  * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
1452  * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
1453  * (session setups in particular).
1454  *
1455  * @param nt_status NTSTATUS input for squashing.
1456  * @return the 'squashed' nt_status
1457  **/
1458
1459 NTSTATUS nt_status_squash(NTSTATUS nt_status)
1460 {
1461         if NT_STATUS_IS_OK(nt_status) {
1462                 return nt_status;
1463         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
1464                 /* Match WinXP and don't give the game away */
1465                 return NT_STATUS_LOGON_FAILURE;
1466
1467         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
1468                 /* Match WinXP and don't give the game away */
1469                 return NT_STATUS_LOGON_FAILURE;
1470         } else {
1471                 return nt_status;
1472         }
1473 }
1474
1475
1476 /**
1477  * Verify whether or not given domain is trusted.
1478  *
1479  * @param domain_name name of the domain to be verified
1480  * @return true if domain is one of the trusted once or
1481  *         false if otherwise
1482  **/
1483
1484 BOOL is_trusted_domain(const char* dom_name)
1485 {
1486         DOM_SID trustdom_sid;
1487         char *pass = NULL;
1488         time_t lct;
1489         BOOL ret;
1490
1491         /* no trusted domains for a standalone server */
1492
1493         if ( lp_server_role() == ROLE_STANDALONE )
1494                 return False;
1495
1496         /* if we are a DC, then check for a direct trust relationships */
1497
1498         if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) {
1499                 become_root();
1500                 ret = secrets_fetch_trusted_domain_password(dom_name, &pass, &trustdom_sid, &lct);
1501                 unbecome_root();
1502                 SAFE_FREE(pass);
1503                 if (ret)
1504                         return True;
1505         }
1506         else {
1507                 /* if winbindd is not up and we are a domain member) then we need to update the
1508                    trustdom_cache ourselves */
1509
1510                 if ( !winbind_ping() )
1511                         update_trustdom_cache();
1512         }
1513
1514         /* now the trustdom cache should be available a DC could still
1515          * have a transitive trust so fall back to the cache of trusted
1516          * domains (like a domain member would use  */
1517
1518         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
1519                 return True;
1520         }
1521
1522         return False;
1523 }
1524