source3/auth/auth_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Authentication utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Andrew Bartlett 2001
   6    Copyright (C) Jeremy Allison 2000-2001
   7    Copyright (C) Rafal Szczesniak 2002
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_AUTH
  28
  29 extern DOM_SID global_sid_World;
  30 extern DOM_SID global_sid_Network;
  31 extern DOM_SID global_sid_Builtin_Guests;
  32 extern DOM_SID global_sid_Authenticated_Users;
  33
  34
  35 /****************************************************************************
  36  Create a UNIX user on demand.
  37 ****************************************************************************/
  38
  39 static int smb_create_user(const char *domain, const char *unix_username, const char *homedir)
  40 {
  41         pstring add_script;
  42         int ret;
  43
  44         pstrcpy(add_script, lp_adduser_script());
  45         if (! *add_script)
  46                 return -1;
  47         all_string_sub(add_script, "%u", unix_username, sizeof(pstring));
  48         if (domain)
  49                 all_string_sub(add_script, "%D", domain, sizeof(pstring));
  50         if (homedir)
  51                 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
  52         ret = smbrun(add_script,NULL);
  53         DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
  54         return ret;
  55 }
  56
  57 /****************************************************************************
  58  Add and Delete UNIX users on demand, based on NTSTATUS codes.
  59 ****************************************************************************/
  60
  61 void auth_add_user_script(const char *domain, const char *username)
  62 {
  63         struct passwd *pwd=NULL;
  64
  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() && !(pwd = Get_Pwnam(username))) {
  72                 smb_create_user(domain, username, NULL);
  73         }
  74 }
  75
  76 /****************************************************************************
  77  Create a SAM_ACCOUNT - either by looking in the pdb, or by faking it up from
  78  unix info.
  79 ****************************************************************************/
  80
  81 NTSTATUS auth_get_sam_account(const char *user, SAM_ACCOUNT **account)
  82 {
  83         BOOL pdb_ret;
  84         NTSTATUS nt_status;
  85         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(account))) {
  86                 return nt_status;
  87         }
  88
  89         become_root();
  90         pdb_ret = pdb_getsampwnam(*account, user);
  91         unbecome_root();
  92
  93         if (!pdb_ret) {
  94
  95                 struct passwd *pass = Get_Pwnam(user);
  96                 if (!pass)
  97                         return NT_STATUS_NO_SUCH_USER;
  98
  99                 if (!NT_STATUS_IS_OK(nt_status = pdb_fill_sam_pw(*account, pass))) {
 100                         return nt_status;
 101                 }
 102         }
 103         return NT_STATUS_OK;
 104 }
 105
 106 /****************************************************************************
 107  Create an auth_usersupplied_data structure
 108 ****************************************************************************/
 109
 110 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
 111                                const char *smb_name,
 112                                const char *internal_username,
 113                                const char *client_domain,
 114                                const char *domain,
 115                                const char *wksta_name,
 116                                DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
 117                                DATA_BLOB plaintext,
 118                                uint32 auth_flags, BOOL encrypted)
 119 {
 120
 121         DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
 122
 123         *user_info = malloc(sizeof(**user_info));
 124         if (!user_info) {
 125                 DEBUG(0,("malloc failed for user_info (size %d)\n", sizeof(*user_info)));
 126                 return NT_STATUS_NO_MEMORY;
 127         }
 128
 129         ZERO_STRUCTP(*user_info);
 130
 131         DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
 132
 133         (*user_info)->smb_name.str = strdup(smb_name);
 134         if ((*user_info)->smb_name.str) {
 135                 (*user_info)->smb_name.len = strlen(smb_name);
 136         } else {
 137                 free_user_info(user_info);
 138                 return NT_STATUS_NO_MEMORY;
 139         }
 140
 141         (*user_info)->internal_username.str = strdup(internal_username);
 142         if ((*user_info)->internal_username.str) {
 143                 (*user_info)->internal_username.len = strlen(internal_username);
 144         } else {
 145                 free_user_info(user_info);
 146                 return NT_STATUS_NO_MEMORY;
 147         }
 148
 149         (*user_info)->domain.str = strdup(domain);
 150         if ((*user_info)->domain.str) {
 151                 (*user_info)->domain.len = strlen(domain);
 152         } else {
 153                 free_user_info(user_info);
 154                 return NT_STATUS_NO_MEMORY;
 155         }
 156
 157         (*user_info)->client_domain.str = strdup(client_domain);
 158         if ((*user_info)->client_domain.str) {
 159                 (*user_info)->client_domain.len = strlen(client_domain);
 160         } else {
 161                 free_user_info(user_info);
 162                 return NT_STATUS_NO_MEMORY;
 163         }
 164
 165         (*user_info)->wksta_name.str = strdup(wksta_name);
 166         if ((*user_info)->wksta_name.str) {
 167                 (*user_info)->wksta_name.len = strlen(wksta_name);
 168         } else {
 169                 free_user_info(user_info);
 170                 return NT_STATUS_NO_MEMORY;
 171         }
 172
 173         DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
 174
 175         (*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length);
 176         (*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length);
 177         (*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length);
 178
 179         (*user_info)->encrypted = encrypted;
 180         (*user_info)->auth_flags = auth_flags;
 181
 182         DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
 183
 184         return NT_STATUS_OK;
 185 }
 186
 187 /****************************************************************************
 188  Create an auth_usersupplied_data structure after appropriate mapping.
 189 ****************************************************************************/
 190
 191 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
 192                             const char *smb_name,
 193                             const char *client_domain,
 194                             const char *wksta_name,
 195                             DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
 196                             DATA_BLOB plaintext,
 197                             uint32 ntlmssp_flags, BOOL encrypted)
 198 {
 199         const char *domain;
 200         fstring internal_username;
 201         fstrcpy(internal_username, smb_name);
 202         map_username(internal_username);
 203
 204         DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
 205               client_domain, smb_name, wksta_name));
 206
 207         /* don't allow "" as a domain, fixes a Win9X bug
 208                    where it doens't supply a domain for logon script
 209            'net use' commands.*/
 210
 211         if ( *client_domain )
 212                 domain = client_domain;
 213         else
 214                 domain = lp_workgroup();
 215
 216         /* do what win2k does.  Always map unknown domains to our own
 217            and let the "passdb backend" handle unknown users. */
 218
 219         if ( !is_trusted_domain(domain) )
 220                 domain = get_default_sam_name();
 221
 222         /* we know that it is a trusted domain (and we are allowing them) or it is our domain */
 223
 224         return make_user_info(user_info, smb_name, internal_username,
 225                 client_domain, domain, wksta_name, lm_pwd, nt_pwd,
 226                 plaintext, ntlmssp_flags, encrypted);
 227 }
 228
 229 /****************************************************************************
 230  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 231  Decrypt and encrypt the passwords.
 232 ****************************************************************************/
 233
 234 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
 235                                      const char *smb_name,
 236                                      const char *client_domain,
 237                                      const char *wksta_name,
 238                                      const uchar *lm_network_pwd, int lm_pwd_len,
 239                                      const uchar *nt_network_pwd, int nt_pwd_len)
 240 {
 241         BOOL ret;
 242         NTSTATUS nt_status;
 243         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
 244         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
 245         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 246         uint32 auth_flags = AUTH_FLAG_NONE;
 247
 248         if (lm_pwd_len)
 249                 auth_flags |= AUTH_FLAG_LM_RESP;
 250         if (nt_pwd_len == 24) {
 251                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 252         } else if (nt_pwd_len != 0) {
 253                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 254         }
 255
 256         nt_status = make_user_info_map(user_info,
 257                                       smb_name, client_domain,
 258                                   wksta_name,
 259                                       lm_blob, nt_blob,
 260                                       plaintext_blob,
 261                                       auth_flags, True);
 262
 263         ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 264
 265         data_blob_free(&lm_blob);
 266         data_blob_free(&nt_blob);
 267         return ret;
 268 }
 269
 270 /****************************************************************************
 271  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 272  Decrypt and encrypt the passwords.
 273 ****************************************************************************/
 274
 275 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
 276                                          const char *smb_name,
 277                                          const char *client_domain,
 278                                          const char *wksta_name,
 279                                          const uchar chal[8],
 280                                          const uchar lm_interactive_pwd[16],
 281                                          const uchar nt_interactive_pwd[16],
 282                                          const uchar *dc_sess_key)
 283 {
 284         char lm_pwd[16];
 285         char nt_pwd[16];
 286         unsigned char local_lm_response[24];
 287         unsigned char local_nt_response[24];
 288         unsigned char key[16];
 289         uint32 auth_flags = AUTH_FLAG_NONE;
 290
 291         ZERO_STRUCT(key);
 292         memcpy(key, dc_sess_key, 8);
 293
 294         if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
 295         if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
 296
 297 #ifdef DEBUG_PASSWORD
 298         DEBUG(100,("key:"));
 299         dump_data(100, (char *)key, sizeof(key));
 300
 301         DEBUG(100,("lm owf password:"));
 302         dump_data(100, lm_pwd, sizeof(lm_pwd));
 303
 304         DEBUG(100,("nt owf password:"));
 305         dump_data(100, nt_pwd, sizeof(nt_pwd));
 306 #endif
 307
 308         SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
 309         SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
 310
 311 #ifdef DEBUG_PASSWORD
 312         DEBUG(100,("decrypt of lm owf password:"));
 313         dump_data(100, lm_pwd, sizeof(lm_pwd));
 314
 315         DEBUG(100,("decrypt of nt owf password:"));
 316         dump_data(100, nt_pwd, sizeof(nt_pwd));
 317 #endif
 318
 319         SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
 320         SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
 321
 322         /* Password info paranoia */
 323         ZERO_STRUCT(lm_pwd);
 324         ZERO_STRUCT(nt_pwd);
 325         ZERO_STRUCT(key);
 326
 327         {
 328                 BOOL ret;
 329                 NTSTATUS nt_status;
 330                 DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
 331                 DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
 332                 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 333
 334                 if (lm_interactive_pwd)
 335                         auth_flags |= AUTH_FLAG_LM_RESP;
 336                 if (nt_interactive_pwd)
 337                         auth_flags |= AUTH_FLAG_NTLM_RESP;
 338
 339                 nt_status = make_user_info_map(user_info,
 340                                                smb_name, client_domain,
 341                                                wksta_name,
 342                                                local_lm_blob,
 343                                                local_nt_blob,
 344                                                plaintext_blob,
 345                                                auth_flags, True);
 346
 347                 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 348                 data_blob_free(&local_lm_blob);
 349                 data_blob_free(&local_nt_blob);
 350                 return ret;
 351         }
 352 }
 353
 354
 355 /****************************************************************************
 356  Create an auth_usersupplied_data structure
 357 ****************************************************************************/
 358
 359 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
 360                               const char *smb_name,
 361                               const char *client_domain,
 362                               const uint8 chal[8],
 363                               DATA_BLOB plaintext_password)
 364 {
 365
 366         DATA_BLOB local_lm_blob;
 367         DATA_BLOB local_nt_blob;
 368         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 369         uint32 auth_flags = AUTH_FLAG_NONE;
 370
 371         /*
 372          * Not encrypted - do so.
 373          */
 374
 375         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n"));
 376
 377         if (plaintext_password.data) {
 378                 unsigned char local_lm_response[24];
 379
 380 #ifdef DEBUG_PASSWORD
 381                 DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length));
 382                 dump_data(100, plaintext_password.data, plaintext_password.length);
 383 #endif
 384
 385                 SMBencrypt( (const uchar *)plaintext_password.data, (const uchar*)chal, local_lm_response);
 386                 local_lm_blob = data_blob(local_lm_response, 24);
 387
 388                 /* We can't do an NT hash here, as the password needs to be
 389                    case insensitive */
 390                 local_nt_blob = data_blob(NULL, 0);
 391
 392                 auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP);
 393         } else {
 394                 local_lm_blob = data_blob(NULL, 0);
 395                 local_nt_blob = data_blob(NULL, 0);
 396         }
 397
 398         ret = make_user_info_map(user_info, smb_name,
 399                                  client_domain,
 400                                  get_remote_machine_name(),
 401                                  local_lm_blob,
 402                                  local_nt_blob,
 403                                  plaintext_password,
 404                                  auth_flags, False);
 405
 406         data_blob_free(&local_lm_blob);
 407         return NT_STATUS_IS_OK(ret) ? True : False;
 408 }
 409
 410 /****************************************************************************
 411  Create an auth_usersupplied_data structure
 412 ****************************************************************************/
 413
 414 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
 415                                       const char *smb_name,
 416                                       const char *client_domain,
 417                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 418 {
 419         uint32 auth_flags = AUTH_FLAG_NONE;
 420
 421         DATA_BLOB no_plaintext_blob = data_blob(NULL, 0);
 422
 423         if (lm_resp.length == 24) {
 424                 auth_flags |= AUTH_FLAG_LM_RESP;
 425         }
 426         if (nt_resp.length == 0) {
 427         } else if (nt_resp.length == 24) {
 428                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 429         } else {
 430                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 431         }
 432
 433         return make_user_info_map(user_info, smb_name,
 434                                  client_domain,
 435                                  get_remote_machine_name(),
 436                                  lm_resp,
 437                                  nt_resp,
 438                                  no_plaintext_blob,
 439                                  auth_flags, True);
 440 }
 441
 442 /****************************************************************************
 443  Create a guest user_info blob, for anonymous authenticaion.
 444 ****************************************************************************/
 445
 446 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
 447 {
 448         DATA_BLOB lm_blob = data_blob(NULL, 0);
 449         DATA_BLOB nt_blob = data_blob(NULL, 0);
 450         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 451         uint32 auth_flags = AUTH_FLAG_NONE;
 452         NTSTATUS nt_status;
 453
 454         nt_status = make_user_info(user_info,
 455                               "","",
 456                               "","",
 457                               "",
 458                               nt_blob, lm_blob,
 459                               plaintext_blob,
 460                               auth_flags, True);
 461
 462         return NT_STATUS_IS_OK(nt_status) ? True : False;
 463 }
 464
 465 /****************************************************************************
 466  prints a NT_USER_TOKEN to debug output.
 467 ****************************************************************************/
 468
 469 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
 470 {
 471         fstring sid_str;
 472         size_t     i;
 473
 474         if (!token) {
 475                 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
 476                 return;
 477         }
 478
 479         DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n",
 480                                     sid_to_string(sid_str, &token->user_sids[0]) ));
 481         DEBUGADDC(dbg_class, dbg_lev, ("contains %i SIDs\n", token->num_sids));
 482         for (i = 0; i < token->num_sids; i++)
 483                 DEBUGADDC(dbg_class, dbg_lev, ("SID[%3i]: %s\n", i,
 484                                                sid_to_string(sid_str, &token->user_sids[i])));
 485 }
 486
 487 /****************************************************************************
 488  prints a UNIX 'token' to debug output.
 489 ****************************************************************************/
 490
 491 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid, int n_groups, gid_t *groups)
 492 {
 493         int     i;
 494         DEBUGC(dbg_class, dbg_lev, ("UNIX token of user %ld\n", (long int)uid));
 495
 496         DEBUGADDC(dbg_class, dbg_lev, ("Primary group is %ld and contains %i supplementary groups\n", (long int)gid, n_groups));
 497         for (i = 0; i < n_groups; i++)
 498                 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
 499                         (long int)groups[i]));
 500 }
 501
 502 /****************************************************************************
 503  Create the SID list for this user.
 504 ****************************************************************************/
 505
 506 static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid,
 507                                      int n_groupSIDs, DOM_SID *groupSIDs,
 508                                      BOOL is_guest, NT_USER_TOKEN **token)
 509 {
 510         NTSTATUS       nt_status = NT_STATUS_OK;
 511         NT_USER_TOKEN *ptoken;
 512         int i;
 513         int sid_ndx;
 514
 515         if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
 516                 DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
 517                 nt_status = NT_STATUS_NO_MEMORY;
 518                 return nt_status;
 519         }
 520
 521         ZERO_STRUCTP(ptoken);
 522
 523         ptoken->num_sids = n_groupSIDs + 5;
 524
 525         if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
 526                 DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
 527                 nt_status = NT_STATUS_NO_MEMORY;
 528                 return nt_status;
 529         }
 530
 531         memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
 532
 533         /*
 534          * Note - user SID *MUST* be first in token !
 535          * se_access_check depends on this.
 536          *
 537          * Primary group SID is second in token. Convention.
 538          */
 539
 540         sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
 541         if (group_sid)
 542                 sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
 543
 544         /*
 545          * Finally add the "standard" SIDs.
 546          * The only difference between guest and "anonymous" (which we
 547          * don't really support) is the addition of Authenticated_Users.
 548          */
 549
 550         sid_copy(&ptoken->user_sids[2], &global_sid_World);
 551         sid_copy(&ptoken->user_sids[3], &global_sid_Network);
 552
 553         if (is_guest)
 554                 sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
 555         else
 556                 sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
 557
 558         sid_ndx = 5; /* next available spot */
 559
 560         for (i = 0; i < n_groupSIDs; i++) {
 561                 size_t check_sid_idx;
 562                 for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
 563                         if (sid_equal(&ptoken->user_sids[check_sid_idx],
 564                                       &groupSIDs[i])) {
 565                                 break;
 566                         }
 567                 }
 568
 569                 if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
 570                         sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
 571                 } else {
 572                         ptoken->num_sids--;
 573                 }
 574         }
 575
 576         debug_nt_user_token(DBGC_AUTH, 10, ptoken);
 577
 578         *token = ptoken;
 579
 580         return nt_status;
 581 }
 582
 583 /****************************************************************************
 584  Create the SID list for this user.
 585 ****************************************************************************/
 586
 587 NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
 588 {
 589         DOM_SID user_sid;
 590         DOM_SID group_sid;
 591         DOM_SID *group_sids;
 592         NT_USER_TOKEN *token;
 593         int i;
 594
 595         if (!NT_STATUS_IS_OK(uid_to_sid(&user_sid, uid))) {
 596                 return NULL;
 597         }
 598         if (!NT_STATUS_IS_OK(gid_to_sid(&group_sid, gid))) {
 599                 return NULL;
 600         }
 601
 602         group_sids = malloc(sizeof(DOM_SID) * ngroups);
 603         if (!group_sids) {
 604                 DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
 605                 return NULL;
 606         }
 607
 608         for (i = 0; i < ngroups; i++) {
 609                 if (!NT_STATUS_IS_OK(gid_to_sid(&(group_sids)[i], (groups)[i]))) {
 610                         DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
 611                         SAFE_FREE(group_sids);
 612                         return NULL;
 613                 }
 614         }
 615
 616         if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid,
 617                                                   ngroups, group_sids, is_guest, &token))) {
 618                 SAFE_FREE(group_sids);
 619                 return NULL;
 620         }
 621
 622         SAFE_FREE(group_sids);
 623
 624         return token;
 625 }
 626
 627 /******************************************************************************
 628  * this function returns the groups (SIDs) of the local SAM the user is in.
 629  * If this samba server is a DC of the domain the user belongs to, it returns
 630  * both domain groups and local / builtin groups. If the user is in a trusted
 631  * domain, or samba is a member server of a domain, then this function returns
 632  * local and builtin groups the user is a member of.
 633  *
 634  * currently this is a hack, as there is no sam implementation that is capable
 635  * of groups.
 636  ******************************************************************************/
 637
 638 static NTSTATUS get_user_groups_from_local_sam(const char *username, uid_t uid, gid_t gid,
 639                                                int *n_groups, DOM_SID **groups, gid_t **unix_groups)
 640 {
 641         int               n_unix_groups;
 642         int               i;
 643
 644         *n_groups = 0;
 645         *groups   = NULL;
 646
 647         n_unix_groups = groups_max();
 648         if ((*unix_groups = malloc( sizeof(gid_t) * n_unix_groups ) ) == NULL) {
 649                 DEBUG(0, ("get_user_groups_from_local_sam: Out of memory allocating unix group list\n"));
 650                 return NT_STATUS_NO_MEMORY;
 651         }
 652
 653         if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) {
 654                 gid_t *groups_tmp;
 655                 groups_tmp = Realloc(*unix_groups, sizeof(gid_t) * n_unix_groups);
 656                 if (!groups_tmp) {
 657                         SAFE_FREE(*unix_groups);
 658                         return NT_STATUS_NO_MEMORY;
 659                 }
 660                 *unix_groups = groups_tmp;
 661
 662                 if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) {
 663                         DEBUG(0, ("get_user_groups_from_local_sam: failed to get the unix group list\n"));
 664                         SAFE_FREE(*unix_groups);
 665                         return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
 666                 }
 667         }
 668
 669         debug_unix_user_token(DBGC_CLASS, 5, uid, gid, n_unix_groups, *unix_groups);
 670
 671         if (n_unix_groups > 0) {
 672                 *groups   = malloc(sizeof(DOM_SID) * n_unix_groups);
 673                 if (!*groups) {
 674                         DEBUG(0, ("get_user_group_from_local_sam: malloc() failed for DOM_SID list!\n"));
 675                         SAFE_FREE(*unix_groups);
 676                         return NT_STATUS_NO_MEMORY;
 677                 }
 678         }
 679
 680         *n_groups = n_unix_groups;
 681
 682         for (i = 0; i < *n_groups; i++) {
 683                 if (!NT_STATUS_IS_OK(gid_to_sid(&(*groups)[i], (*unix_groups)[i]))) {
 684                         DEBUG(1, ("get_user_groups_from_local_sam: failed to convert gid %ld to a sid!\n", (long int)(*unix_groups)[i+1]));
 685                         SAFE_FREE(*groups);
 686                         SAFE_FREE(*unix_groups);
 687                         return NT_STATUS_NO_SUCH_USER;
 688                 }
 689         }
 690
 691         return NT_STATUS_OK;
 692 }
 693
 694 /***************************************************************************
 695  Make a user_info struct
 696 ***************************************************************************/
 697
 698 static NTSTATUS make_server_info(auth_serversupplied_info **server_info)
 699 {
 700         *server_info = malloc(sizeof(**server_info));
 701         if (!*server_info) {
 702                 DEBUG(0,("make_server_info: malloc failed!\n"));
 703                 return NT_STATUS_NO_MEMORY;
 704         }
 705         ZERO_STRUCTP(*server_info);
 706
 707         /* Initialise the uid and gid values to something non-zero
 708            which may save us from giving away root access if there
 709            is a bug in allocating these fields. */
 710
 711         (*server_info)->uid = -1;
 712         (*server_info)->gid = -1;
 713
 714         return NT_STATUS_OK;
 715 }
 716
 717 /***************************************************************************
 718 Fill a server_info struct from a SAM_ACCOUNT with their groups
 719 ***************************************************************************/
 720
 721 static NTSTATUS add_user_groups(auth_serversupplied_info **server_info,
 722                                 SAM_ACCOUNT *sampass,
 723                                 uid_t uid, gid_t gid)
 724 {
 725         NTSTATUS nt_status;
 726         const DOM_SID *user_sid = pdb_get_user_sid(sampass);
 727         const DOM_SID *group_sid = pdb_get_group_sid(sampass);
 728         int       n_groupSIDs = 0;
 729         DOM_SID  *groupSIDs   = NULL;
 730         gid_t    *unix_groups = NULL;
 731         NT_USER_TOKEN *token;
 732         BOOL is_guest;
 733         uint32 rid;
 734
 735         nt_status = get_user_groups_from_local_sam(pdb_get_username(sampass),
 736                                                    uid, gid,
 737                                                    &n_groupSIDs, &groupSIDs,
 738                                                    &unix_groups);
 739         if (!NT_STATUS_IS_OK(nt_status)) {
 740                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
 741                 free_server_info(server_info);
 742                 return nt_status;
 743         }
 744
 745         is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
 746
 747         if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
 748                                                               n_groupSIDs, groupSIDs, is_guest,
 749                                                               &token)))
 750         {
 751                 DEBUG(4,("create_nt_user_token failed\n"));
 752                 SAFE_FREE(groupSIDs);
 753                 SAFE_FREE(unix_groups);
 754                 free_server_info(server_info);
 755                 return nt_status;
 756         }
 757
 758         SAFE_FREE(groupSIDs);
 759
 760         (*server_info)->n_groups = n_groupSIDs;
 761         (*server_info)->groups = unix_groups;
 762         (*server_info)->ptok = token;
 763
 764         return nt_status;
 765 }
 766
 767 /***************************************************************************
 768  Make (and fill) a user_info struct from a SAM_ACCOUNT
 769 ***************************************************************************/
 770
 771 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
 772                               SAM_ACCOUNT *sampass)
 773 {
 774         NTSTATUS nt_status;
 775         struct passwd *pwd;
 776
 777         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info)))
 778                 return nt_status;
 779
 780         (*server_info)->sam_account    = sampass;
 781
 782         if ( !(pwd = getpwnam_alloc(pdb_get_username(sampass))) )  {
 783                 DEBUG(1, ("User %s in passdb, but getpwnam() fails!\n",
 784                           pdb_get_username(sampass)));
 785                 free_server_info(server_info);
 786                 return NT_STATUS_NO_SUCH_USER;
 787         }
 788         (*server_info)->unix_name = smb_xstrdup(pwd->pw_name);
 789         (*server_info)->gid = pwd->pw_gid;
 790         (*server_info)->uid = pwd->pw_uid;
 791
 792         passwd_free(&pwd);
 793
 794         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, sampass,
 795                                                          (*server_info)->uid,
 796                                                          (*server_info)->gid))) {
 797                 free_server_info(server_info);
 798                 return nt_status;
 799         }
 800
 801         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 802         DEBUG(5,("make_server_info_sam: made server info for user %s -> %s\n",
 803                  pdb_get_username(sampass),
 804                  (*server_info)->unix_name));
 805
 806         return nt_status;
 807 }
 808
 809 /***************************************************************************
 810  Make (and fill) a user_info struct from a 'struct passwd' by conversion
 811  to a SAM_ACCOUNT
 812 ***************************************************************************/
 813
 814 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
 815 {
 816         NTSTATUS nt_status;
 817         SAM_ACCOUNT *sampass = NULL;
 818         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
 819                 return nt_status;
 820         }
 821         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
 822                 return nt_status;
 823         }
 824
 825         (*server_info)->sam_account    = sampass;
 826
 827         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, sampass, pwd->pw_uid, pwd->pw_gid))) {
 828                 return nt_status;
 829         }
 830
 831         (*server_info)->unix_name = smb_xstrdup(pwd->pw_name);
 832
 833         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 834         (*server_info)->uid = pwd->pw_uid;
 835         (*server_info)->gid = pwd->pw_gid;
 836         return nt_status;
 837 }
 838
 839 /***************************************************************************
 840  Make (and fill) a user_info struct for a guest login.
 841 ***************************************************************************/
 842
 843 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
 844 {
 845         NTSTATUS nt_status;
 846         SAM_ACCOUNT *sampass = NULL;
 847         DOM_SID guest_sid;
 848
 849         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
 850                 return nt_status;
 851         }
 852
 853         sid_copy(&guest_sid, get_global_sam_sid());
 854         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
 855
 856         become_root();
 857         if (!pdb_getsampwsid(sampass, &guest_sid)) {
 858                 unbecome_root();
 859                 return NT_STATUS_NO_SUCH_USER;
 860         }
 861         unbecome_root();
 862
 863         nt_status = make_server_info_sam(server_info, sampass);
 864
 865         if (NT_STATUS_IS_OK(nt_status)) {
 866                 (*server_info)->guest = True;
 867         }
 868
 869         return nt_status;
 870 }
 871
 872 /***************************************************************************
 873  Purely internal function for make_server_info_info3
 874  Fill the sam account from getpwnam
 875 ***************************************************************************/
 876 static NTSTATUS fill_sam_account(TALLOC_CTX *mem_ctx,
 877                                  const char *domain,
 878                                  const char *username,
 879                                  char **found_username,
 880                                  uid_t *uid, gid_t *gid,
 881                                  SAM_ACCOUNT **sam_account)
 882 {
 883         fstring dom_user;
 884         struct passwd *passwd;
 885
 886         fstr_sprintf(dom_user, "%s%s%s",
 887                      domain, lp_winbind_separator(), username);
 888
 889         passwd = Get_Pwnam(dom_user);
 890
 891         /* if the lookup for DOMAIN\username failed, try again
 892            with just 'username'.  This is need for accessing the server
 893            as a trust user that actually maps to a local account */
 894
 895         if ( !passwd )
 896                 passwd = Get_Pwnam(username);
 897
 898         if (passwd == NULL)
 899                 return NT_STATUS_NO_SUCH_USER;
 900
 901         *uid = passwd->pw_uid;
 902         *gid = passwd->pw_gid;
 903
 904         *found_username = talloc_strdup(mem_ctx, passwd->pw_name);
 905
 906         return pdb_init_sam_pw(sam_account, passwd);
 907 }
 908
 909 /***************************************************************************
 910  Make a server_info struct from the info3 returned by a domain logon
 911 ***************************************************************************/
 912
 913 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
 914                                 const char *internal_username,
 915                                 const char *sent_nt_username,
 916                                 const char *domain,
 917                                 auth_serversupplied_info **server_info,
 918                                 NET_USER_INFO_3 *info3)
 919 {
 920         NTSTATUS nt_status = NT_STATUS_OK;
 921         char *found_username;
 922         const char *nt_domain;
 923         const char *nt_username;
 924
 925         SAM_ACCOUNT *sam_account = NULL;
 926         DOM_SID user_sid;
 927         DOM_SID group_sid;
 928
 929         uid_t uid;
 930         gid_t gid;
 931
 932         int n_lgroupSIDs;
 933         DOM_SID *lgroupSIDs   = NULL;
 934
 935         gid_t *unix_groups = NULL;
 936         NT_USER_TOKEN *token;
 937
 938         DOM_SID *all_group_SIDs;
 939         size_t i;
 940
 941         /*
 942            Here is where we should check the list of
 943            trusted domains, and verify that the SID
 944            matches.
 945         */
 946
 947         sid_copy(&user_sid, &info3->dom_sid.sid);
 948         if (!sid_append_rid(&user_sid, info3->user_rid)) {
 949                 return NT_STATUS_INVALID_PARAMETER;
 950         }
 951
 952         sid_copy(&group_sid, &info3->dom_sid.sid);
 953         if (!sid_append_rid(&group_sid, info3->group_rid)) {
 954                 return NT_STATUS_INVALID_PARAMETER;
 955         }
 956
 957         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
 958                 /* If the server didn't give us one, just use the one we sent them */
 959                 nt_username = sent_nt_username;
 960         }
 961
 962         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
 963                 /* If the server didn't give us one, just use the one we sent them */
 964                 domain = domain;
 965         }
 966
 967         /* try to fill the same account..  If getpwnam() fails, then try the
 968            add user script (2.2.x behavior) */
 969
 970         nt_status = fill_sam_account(mem_ctx, nt_domain, internal_username,
 971                 &found_username, &uid, &gid, &sam_account);
 972
 973         if (NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER)) {
 974                 DEBUG(3,("User %s does not exist, trying to add it\n",
 975                         internal_username));
 976                 auth_add_user_script(nt_domain, internal_username);
 977                 nt_status = fill_sam_account(mem_ctx, nt_domain,
 978                         internal_username, &found_username,
 979                         &uid, &gid, &sam_account);
 980         }
 981
 982         if (!NT_STATUS_IS_OK(nt_status)) {
 983                 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
 984                 return nt_status;
 985         }
 986
 987         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
 988                 pdb_free_sam(&sam_account);
 989                 return NT_STATUS_NO_MEMORY;
 990         }
 991
 992         if (!pdb_set_username(sam_account, nt_username, PDB_CHANGED)) {
 993                 pdb_free_sam(&sam_account);
 994                 return NT_STATUS_NO_MEMORY;
 995         }
 996
 997         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
 998                 pdb_free_sam(&sam_account);
 999                 return NT_STATUS_NO_MEMORY;
1000         }
1001
1002         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
1003                 pdb_free_sam(&sam_account);
1004                 return NT_STATUS_UNSUCCESSFUL;
1005         }
1006
1007         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
1008                 pdb_free_sam(&sam_account);
1009                 return NT_STATUS_UNSUCCESSFUL;
1010         }
1011
1012         if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)),
1013                               PDB_CHANGED)) {
1014                 pdb_free_sam(&sam_account);
1015                 return NT_STATUS_NO_MEMORY;
1016         }
1017
1018         if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) {
1019                 pdb_free_sam(&sam_account);
1020                 return NT_STATUS_NO_MEMORY;
1021         }
1022
1023         if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) {
1024                 pdb_free_sam(&sam_account);
1025                 return NT_STATUS_NO_MEMORY;
1026         }
1027
1028         if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) {
1029                 pdb_free_sam(&sam_account);
1030                 return NT_STATUS_NO_MEMORY;
1031         }
1032
1033         if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) {
1034                 pdb_free_sam(&sam_account);
1035                 return NT_STATUS_NO_MEMORY;
1036         }
1037
1038         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
1039                 DEBUG(4, ("make_server_info failed!\n"));
1040                 pdb_free_sam(&sam_account);
1041                 return nt_status;
1042         }
1043
1044         /* save this here to _net_sam_logon() doesn't fail (it assumes a
1045            valid SAM_ACCOUNT) */
1046
1047         (*server_info)->sam_account = sam_account;
1048
1049         (*server_info)->unix_name = smb_xstrdup(found_username);
1050
1051         /* Fill in the unix info we found on the way */
1052
1053         (*server_info)->sam_fill_level = SAM_FILL_ALL;
1054         (*server_info)->uid = uid;
1055         (*server_info)->gid = gid;
1056
1057         /* Store the user group information in the server_info
1058            returned to the caller. */
1059
1060         nt_status = get_user_groups_from_local_sam((*server_info)->unix_name,
1061                 uid, gid, &n_lgroupSIDs, &lgroupSIDs, &unix_groups);
1062         if ( !NT_STATUS_IS_OK(nt_status) )
1063         {
1064                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
1065                 return nt_status;
1066         }
1067
1068         (*server_info)->groups = unix_groups;
1069         (*server_info)->n_groups = n_lgroupSIDs;
1070
1071         /* Create a 'combined' list of all SIDs we might want in the SD */
1072         all_group_SIDs   = malloc(sizeof(DOM_SID) *
1073                                   (n_lgroupSIDs + info3->num_groups2 +
1074                                    info3->num_other_sids));
1075         if (!all_group_SIDs) {
1076                 DEBUG(0, ("malloc() failed for DOM_SID list!\n"));
1077                 SAFE_FREE(lgroupSIDs);
1078                 free_server_info(server_info);
1079                 return NT_STATUS_NO_MEMORY;
1080         }
1081
1082         /* Copy the 'local' sids */
1083         memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
1084         SAFE_FREE(lgroupSIDs);
1085
1086         /* and create (by appending rids) the 'domain' sids */
1087         for (i = 0; i < info3->num_groups2; i++) {
1088                 sid_copy(&all_group_SIDs[i+n_lgroupSIDs], &(info3->dom_sid.sid));
1089                 if (!sid_append_rid(&all_group_SIDs[i+n_lgroupSIDs], info3->gids[i].g_rid)) {
1090                         nt_status = NT_STATUS_INVALID_PARAMETER;
1091                         DEBUG(3,("could not append additional group rid 0x%x\n",
1092                                 info3->gids[i].g_rid));
1093                         SAFE_FREE(lgroupSIDs);
1094                         free_server_info(server_info);
1095                         return nt_status;
1096                 }
1097         }
1098
1099         /* Copy 'other' sids.  We need to do sid filtering here to
1100            prevent possible elevation of privileges.  See:
1101
1102            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1103          */
1104
1105         for (i = 0; i < info3->num_other_sids; i++)
1106                 sid_copy(&all_group_SIDs[
1107                                  n_lgroupSIDs + info3->num_groups2 + i],
1108                          &info3->other_sids[i].sid);
1109
1110         /* Where are the 'global' sids... */
1111
1112         /* can the user be guest? if yes, where is it stored? */
1113         if (!NT_STATUS_IS_OK(
1114                     nt_status = create_nt_user_token(
1115                             &user_sid, &group_sid,
1116                             n_lgroupSIDs + info3->num_groups2 + info3->num_other_sids,
1117                             all_group_SIDs, False, &token))) {
1118                 DEBUG(4,("create_nt_user_token failed\n"));
1119                 SAFE_FREE(all_group_SIDs);
1120                 free_server_info(server_info);
1121                 return nt_status;
1122         }
1123
1124         (*server_info)->ptok = token;
1125
1126         SAFE_FREE(all_group_SIDs);
1127
1128         memcpy((*server_info)->session_key, info3->user_sess_key, sizeof((*server_info)->session_key)/* 16 */);
1129         memcpy((*server_info)->first_8_lm_hash, info3->padding, 8);
1130
1131         return NT_STATUS_OK;
1132 }
1133
1134 /***************************************************************************
1135  Free a user_info struct
1136 ***************************************************************************/
1137
1138 void free_user_info(auth_usersupplied_info **user_info)
1139 {
1140         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1141         if (*user_info != NULL) {
1142                 if ((*user_info)->smb_name.str) {
1143                         DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1144                 }
1145                 SAFE_FREE((*user_info)->smb_name.str);
1146                 SAFE_FREE((*user_info)->internal_username.str);
1147                 SAFE_FREE((*user_info)->client_domain.str);
1148                 SAFE_FREE((*user_info)->domain.str);
1149                 SAFE_FREE((*user_info)->wksta_name.str);
1150                 data_blob_free(&(*user_info)->lm_resp);
1151                 data_blob_free(&(*user_info)->nt_resp);
1152                 SAFE_FREE((*user_info)->interactive_password);
1153                 data_blob_clear_free(&(*user_info)->plaintext_password);
1154                 ZERO_STRUCT(**user_info);
1155         }
1156         SAFE_FREE(*user_info);
1157 }
1158
1159 /***************************************************************************
1160  Clear out a server_info struct that has been allocated
1161 ***************************************************************************/
1162
1163 void free_server_info(auth_serversupplied_info **server_info)
1164 {
1165         DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1166         if (*server_info != NULL) {
1167                 pdb_free_sam(&(*server_info)->sam_account);
1168
1169                 /* call pam_end here, unless we know we are keeping it */
1170                 delete_nt_token( &(*server_info)->ptok );
1171                 SAFE_FREE((*server_info)->groups);
1172                 SAFE_FREE((*server_info)->unix_name);
1173                 ZERO_STRUCT(**server_info);
1174         }
1175         SAFE_FREE(*server_info);
1176 }
1177
1178 /***************************************************************************
1179  Make an auth_methods struct
1180 ***************************************************************************/
1181
1182 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1183 {
1184         if (!auth_context) {
1185                 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1186         }
1187
1188         if (!auth_method) {
1189                 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1190         }
1191
1192         *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1193         if (!*auth_method) {
1194                 DEBUG(0,("make_auth_method: malloc failed!\n"));
1195                 return False;
1196         }
1197         ZERO_STRUCTP(*auth_method);
1198
1199         return True;
1200 }
1201
1202 /****************************************************************************
1203  Delete a SID token.
1204 ****************************************************************************/
1205
1206 void delete_nt_token(NT_USER_TOKEN **pptoken)
1207 {
1208     if (*pptoken) {
1209             NT_USER_TOKEN *ptoken = *pptoken;
1210             SAFE_FREE( ptoken->user_sids );
1211             ZERO_STRUCTP(ptoken);
1212     }
1213     SAFE_FREE(*pptoken);
1214 }
1215
1216 /****************************************************************************
1217  Duplicate a SID token.
1218 ****************************************************************************/
1219
1220 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1221 {
1222         NT_USER_TOKEN *token;
1223
1224         if (!ptoken)
1225                 return NULL;
1226
1227     if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1228         return NULL;
1229
1230     ZERO_STRUCTP(token);
1231
1232     if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1233         SAFE_FREE(token);
1234         return NULL;
1235     }
1236
1237     token->num_sids = ptoken->num_sids;
1238
1239         return token;
1240 }
1241
1242 /**
1243  * Squash an NT_STATUS in line with security requirements.
1244  * In an attempt to avoid giving the whole game away when users
1245  * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
1246  * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
1247  * (session setups in particular).
1248  *
1249  * @param nt_status NTSTATUS input for squashing.
1250  * @return the 'squashed' nt_status
1251  **/
1252
1253 NTSTATUS nt_status_squash(NTSTATUS nt_status)
1254 {
1255         if NT_STATUS_IS_OK(nt_status) {
1256                 return nt_status;
1257         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
1258                 /* Match WinXP and don't give the game away */
1259                 return NT_STATUS_LOGON_FAILURE;
1260
1261         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
1262                 /* Match WinXP and don't give the game away */
1263                 return NT_STATUS_LOGON_FAILURE;
1264         } else {
1265                 return nt_status;
1266         }
1267 }
1268
1269
1270 /**
1271  * Verify whether or not given domain is trusted.
1272  *
1273  * @param domain_name name of the domain to be verified
1274  * @return true if domain is one of the trusted once or
1275  *         false if otherwise
1276  **/
1277
1278 BOOL is_trusted_domain(const char* dom_name)
1279 {
1280         DOM_SID trustdom_sid;
1281         char *pass = NULL;
1282         time_t lct;
1283         BOOL ret;
1284
1285         /* no trusted domains for a standalone server */
1286
1287         if ( lp_server_role() == ROLE_STANDALONE )
1288                 return False;
1289
1290         /* if we are a DC, then check for a direct trust relationships */
1291
1292         if (lp_server_role() == ROLE_DOMAIN_BDC || lp_server_role() == ROLE_DOMAIN_PDC) {
1293                 become_root();
1294                 ret = secrets_fetch_trusted_domain_password(dom_name, &pass, &trustdom_sid, &lct);
1295                 unbecome_root();
1296                 SAFE_FREE(pass);
1297                 if (ret)
1298                         return True;
1299         }
1300         else {
1301                 /* if winbindd is not up and we are a domain member) then we need to update the
1302                    trustdom_cache ourselves */
1303
1304                 if ( !winbind_ping() )
1305                         update_trustdom_cache();
1306         }
1307
1308         /* now the trustdom cache should be available a DC could still
1309          * have a transitive trust so fall back to the cache of trusted
1310          * domains (like a domain member would use  */
1311
1312         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
1313                 return True;
1314         }
1315
1316         return False;
1317 }
1318