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 ****************************************************************************/
  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_global_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,
 225                               smb_name, internal_username,
 226                               client_domain, domain,
 227                               wksta_name,
 228                               lm_pwd, nt_pwd,
 229                               plaintext,
 230                               ntlmssp_flags, encrypted);
 231 }
 232
 233 /****************************************************************************
 234  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 235  Decrypt and encrypt the passwords.
 236 ****************************************************************************/
 237
 238 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
 239                                      const char *smb_name,
 240                                      const char *client_domain,
 241                                      const char *wksta_name,
 242                                      const uchar *lm_network_pwd, int lm_pwd_len,
 243                                      const uchar *nt_network_pwd, int nt_pwd_len)
 244 {
 245         BOOL ret;
 246         NTSTATUS nt_status;
 247         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
 248         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
 249         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 250         uint32 auth_flags = AUTH_FLAG_NONE;
 251
 252         if (lm_pwd_len)
 253                 auth_flags |= AUTH_FLAG_LM_RESP;
 254         if (nt_pwd_len == 24) {
 255                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 256         } else if (nt_pwd_len != 0) {
 257                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 258         }
 259
 260         nt_status = make_user_info_map(user_info,
 261                                       smb_name, client_domain,
 262                                   wksta_name,
 263                                       lm_blob, nt_blob,
 264                                       plaintext_blob,
 265                                       auth_flags, True);
 266
 267         ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 268
 269         data_blob_free(&lm_blob);
 270         data_blob_free(&nt_blob);
 271         return ret;
 272 }
 273
 274 /****************************************************************************
 275  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 276  Decrypt and encrypt the passwords.
 277 ****************************************************************************/
 278
 279 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
 280                                          const char *smb_name,
 281                                          const char *client_domain,
 282                                          const char *wksta_name,
 283                                          const uchar chal[8],
 284                                          const uchar lm_interactive_pwd[16],
 285                                          const uchar nt_interactive_pwd[16],
 286                                          const uchar *dc_sess_key)
 287 {
 288         char lm_pwd[16];
 289         char nt_pwd[16];
 290         unsigned char local_lm_response[24];
 291         unsigned char local_nt_response[24];
 292         unsigned char key[16];
 293         uint32 auth_flags = AUTH_FLAG_NONE;
 294
 295         ZERO_STRUCT(key);
 296         memcpy(key, dc_sess_key, 8);
 297
 298         if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
 299         if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
 300
 301 #ifdef DEBUG_PASSWORD
 302         DEBUG(100,("key:"));
 303         dump_data(100, (char *)key, sizeof(key));
 304
 305         DEBUG(100,("lm owf password:"));
 306         dump_data(100, lm_pwd, sizeof(lm_pwd));
 307
 308         DEBUG(100,("nt owf password:"));
 309         dump_data(100, nt_pwd, sizeof(nt_pwd));
 310 #endif
 311
 312         SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
 313         SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
 314
 315 #ifdef DEBUG_PASSWORD
 316         DEBUG(100,("decrypt of lm owf password:"));
 317         dump_data(100, lm_pwd, sizeof(lm_pwd));
 318
 319         DEBUG(100,("decrypt of nt owf password:"));
 320         dump_data(100, nt_pwd, sizeof(nt_pwd));
 321 #endif
 322
 323         SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
 324         SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
 325
 326         /* Password info paranoia */
 327         ZERO_STRUCT(lm_pwd);
 328         ZERO_STRUCT(nt_pwd);
 329         ZERO_STRUCT(key);
 330
 331         {
 332                 BOOL ret;
 333                 NTSTATUS nt_status;
 334                 DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
 335                 DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
 336                 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 337
 338                 if (lm_interactive_pwd)
 339                         auth_flags |= AUTH_FLAG_LM_RESP;
 340                 if (nt_interactive_pwd)
 341                         auth_flags |= AUTH_FLAG_NTLM_RESP;
 342
 343                 nt_status = make_user_info_map(user_info,
 344                                                smb_name, client_domain,
 345                                                wksta_name,
 346                                                local_lm_blob,
 347                                                local_nt_blob,
 348                                                plaintext_blob,
 349                                                auth_flags, True);
 350
 351                 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 352                 data_blob_free(&local_lm_blob);
 353                 data_blob_free(&local_nt_blob);
 354                 return ret;
 355         }
 356 }
 357
 358
 359 /****************************************************************************
 360  Create an auth_usersupplied_data structure
 361 ****************************************************************************/
 362
 363 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
 364                               const char *smb_name,
 365                               const char *client_domain,
 366                               const uint8 chal[8],
 367                               DATA_BLOB plaintext_password)
 368 {
 369
 370         DATA_BLOB local_lm_blob;
 371         DATA_BLOB local_nt_blob;
 372         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 373         uint32 auth_flags = AUTH_FLAG_NONE;
 374
 375         /*
 376          * Not encrypted - do so.
 377          */
 378
 379         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n"));
 380
 381         if (plaintext_password.data) {
 382                 unsigned char local_lm_response[24];
 383
 384 #ifdef DEBUG_PASSWORD
 385                 DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length));
 386                 dump_data(100, plaintext_password.data, plaintext_password.length);
 387 #endif
 388
 389                 SMBencrypt( (const uchar *)plaintext_password.data, (const uchar*)chal, local_lm_response);
 390                 local_lm_blob = data_blob(local_lm_response, 24);
 391
 392                 /* We can't do an NT hash here, as the password needs to be
 393                    case insensitive */
 394                 local_nt_blob = data_blob(NULL, 0);
 395
 396                 auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP);
 397         } else {
 398                 local_lm_blob = data_blob(NULL, 0);
 399                 local_nt_blob = data_blob(NULL, 0);
 400         }
 401
 402         ret = make_user_info_map(user_info, smb_name,
 403                                  client_domain,
 404                                  get_remote_machine_name(),
 405                                  local_lm_blob,
 406                                  local_nt_blob,
 407                                  plaintext_password,
 408                                  auth_flags, False);
 409
 410         data_blob_free(&local_lm_blob);
 411         return NT_STATUS_IS_OK(ret) ? True : False;
 412 }
 413
 414 /****************************************************************************
 415  Create an auth_usersupplied_data structure
 416 ****************************************************************************/
 417
 418 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
 419                                       const char *smb_name,
 420                                       const char *client_domain,
 421                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 422 {
 423         uint32 auth_flags = AUTH_FLAG_NONE;
 424
 425         DATA_BLOB no_plaintext_blob = data_blob(NULL, 0);
 426
 427         if (lm_resp.length == 24) {
 428                 auth_flags |= AUTH_FLAG_LM_RESP;
 429         }
 430         if (nt_resp.length == 0) {
 431         } else if (nt_resp.length == 24) {
 432                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 433         } else {
 434                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 435         }
 436
 437         return make_user_info_map(user_info, smb_name,
 438                                  client_domain,
 439                                  get_remote_machine_name(),
 440                                  lm_resp,
 441                                  nt_resp,
 442                                  no_plaintext_blob,
 443                                  auth_flags, True);
 444 }
 445
 446 /****************************************************************************
 447  Create a guest user_info blob, for anonymous authenticaion.
 448 ****************************************************************************/
 449
 450 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
 451 {
 452         DATA_BLOB lm_blob = data_blob(NULL, 0);
 453         DATA_BLOB nt_blob = data_blob(NULL, 0);
 454         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 455         uint32 auth_flags = AUTH_FLAG_NONE;
 456         NTSTATUS nt_status;
 457
 458         nt_status = make_user_info(user_info,
 459                               "","",
 460                               "","",
 461                               "",
 462                               nt_blob, lm_blob,
 463                               plaintext_blob,
 464                               auth_flags, True);
 465
 466         return NT_STATUS_IS_OK(nt_status) ? True : False;
 467 }
 468
 469 /****************************************************************************
 470  prints a NT_USER_TOKEN to debug output.
 471 ****************************************************************************/
 472
 473 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
 474 {
 475         fstring sid_str;
 476         size_t     i;
 477
 478         if (!token) {
 479                 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
 480                 return;
 481         }
 482
 483         DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n",
 484                                     sid_to_string(sid_str, &token->user_sids[0]) ));
 485         DEBUGADDC(dbg_class, dbg_lev, ("contains %i SIDs\n", token->num_sids));
 486         for (i = 0; i < token->num_sids; i++)
 487                 DEBUGADDC(dbg_class, dbg_lev, ("SID[%3i]: %s\n", i,
 488                                                sid_to_string(sid_str, &token->user_sids[i])));
 489 }
 490
 491 /****************************************************************************
 492  prints a UNIX 'token' to debug output.
 493 ****************************************************************************/
 494
 495 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid, int n_groups, gid_t *groups)
 496 {
 497         int     i;
 498         DEBUGC(dbg_class, dbg_lev, ("UNIX token of user %ld\n", (long int)uid));
 499
 500         DEBUGADDC(dbg_class, dbg_lev, ("Primary group is %ld and contains %i supplementary groups\n", (long int)gid, n_groups));
 501         for (i = 0; i < n_groups; i++)
 502                 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
 503                         (long int)groups[i]));
 504 }
 505
 506 /****************************************************************************
 507  Create the SID list for this user.
 508 ****************************************************************************/
 509
 510 static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid,
 511                                      int n_groupSIDs, DOM_SID *groupSIDs,
 512                                      BOOL is_guest, NT_USER_TOKEN **token)
 513 {
 514         NTSTATUS       nt_status = NT_STATUS_OK;
 515         NT_USER_TOKEN *ptoken;
 516         int i;
 517         int sid_ndx;
 518
 519         if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
 520                 DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
 521                 nt_status = NT_STATUS_NO_MEMORY;
 522                 return nt_status;
 523         }
 524
 525         ZERO_STRUCTP(ptoken);
 526
 527         ptoken->num_sids = n_groupSIDs + 5;
 528
 529         if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
 530                 DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
 531                 nt_status = NT_STATUS_NO_MEMORY;
 532                 return nt_status;
 533         }
 534
 535         memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
 536
 537         /*
 538          * Note - user SID *MUST* be first in token !
 539          * se_access_check depends on this.
 540          *
 541          * Primary group SID is second in token. Convention.
 542          */
 543
 544         sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
 545         if (group_sid)
 546                 sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
 547
 548         /*
 549          * Finally add the "standard" SIDs.
 550          * The only difference between guest and "anonymous" (which we
 551          * don't really support) is the addition of Authenticated_Users.
 552          */
 553
 554         sid_copy(&ptoken->user_sids[2], &global_sid_World);
 555         sid_copy(&ptoken->user_sids[3], &global_sid_Network);
 556
 557         if (is_guest)
 558                 sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
 559         else
 560                 sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
 561
 562         sid_ndx = 5; /* next available spot */
 563
 564         for (i = 0; i < n_groupSIDs; i++) {
 565                 size_t check_sid_idx;
 566                 for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
 567                         if (sid_equal(&ptoken->user_sids[check_sid_idx],
 568                                       &groupSIDs[i])) {
 569                                 break;
 570                         }
 571                 }
 572
 573                 if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
 574                         sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
 575                 } else {
 576                         ptoken->num_sids--;
 577                 }
 578         }
 579
 580         debug_nt_user_token(DBGC_AUTH, 10, ptoken);
 581
 582         *token = ptoken;
 583
 584         return nt_status;
 585 }
 586
 587 /****************************************************************************
 588  Create the SID list for this user.
 589 ****************************************************************************/
 590
 591 NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
 592 {
 593         DOM_SID user_sid;
 594         DOM_SID group_sid;
 595         DOM_SID *group_sids;
 596         NT_USER_TOKEN *token;
 597         int i;
 598
 599         if (!NT_STATUS_IS_OK(uid_to_sid(&user_sid, uid))) {
 600                 return NULL;
 601         }
 602         if (!NT_STATUS_IS_OK(gid_to_sid(&group_sid, gid))) {
 603                 return NULL;
 604         }
 605
 606         group_sids = malloc(sizeof(DOM_SID) * ngroups);
 607         if (!group_sids) {
 608                 DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
 609                 return NULL;
 610         }
 611
 612         for (i = 0; i < ngroups; i++) {
 613                 if (!NT_STATUS_IS_OK(gid_to_sid(&(group_sids)[i], (groups)[i]))) {
 614                         DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
 615                         SAFE_FREE(group_sids);
 616                         return NULL;
 617                 }
 618         }
 619
 620         if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid,
 621                                                   ngroups, group_sids, is_guest, &token))) {
 622                 SAFE_FREE(group_sids);
 623                 return NULL;
 624         }
 625
 626         SAFE_FREE(group_sids);
 627
 628         return token;
 629 }
 630
 631 /******************************************************************************
 632  * this function returns the groups (SIDs) of the local SAM the user is in.
 633  * If this samba server is a DC of the domain the user belongs to, it returns
 634  * both domain groups and local / builtin groups. If the user is in a trusted
 635  * domain, or samba is a member server of a domain, then this function returns
 636  * local and builtin groups the user is a member of.
 637  *
 638  * currently this is a hack, as there is no sam implementation that is capable
 639  * of groups.
 640  ******************************************************************************/
 641
 642 static NTSTATUS get_user_groups_from_local_sam(const char *username, uid_t uid, gid_t gid,
 643                                                int *n_groups, DOM_SID **groups, gid_t **unix_groups)
 644 {
 645         int               n_unix_groups;
 646         int               i;
 647
 648         *n_groups = 0;
 649         *groups   = NULL;
 650
 651         n_unix_groups = groups_max();
 652         if ((*unix_groups = malloc( sizeof(gid_t) * n_unix_groups ) ) == NULL) {
 653                 DEBUG(0, ("get_user_groups_from_local_sam: Out of memory allocating unix group list\n"));
 654                 return NT_STATUS_NO_MEMORY;
 655         }
 656
 657         if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) {
 658                 gid_t *groups_tmp;
 659                 groups_tmp = Realloc(*unix_groups, sizeof(gid_t) * n_unix_groups);
 660                 if (!groups_tmp) {
 661                         SAFE_FREE(*unix_groups);
 662                         return NT_STATUS_NO_MEMORY;
 663                 }
 664                 *unix_groups = groups_tmp;
 665
 666                 if (sys_getgrouplist(username, gid, *unix_groups, &n_unix_groups) == -1) {
 667                         DEBUG(0, ("get_user_groups_from_local_sam: failed to get the unix group list\n"));
 668                         SAFE_FREE(*unix_groups);
 669                         return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
 670                 }
 671         }
 672
 673         debug_unix_user_token(DBGC_CLASS, 5, uid, gid, n_unix_groups, *unix_groups);
 674
 675         if (n_unix_groups > 0) {
 676                 *groups   = malloc(sizeof(DOM_SID) * n_unix_groups);
 677                 if (!*groups) {
 678                         DEBUG(0, ("get_user_group_from_local_sam: malloc() failed for DOM_SID list!\n"));
 679                         SAFE_FREE(*unix_groups);
 680                         return NT_STATUS_NO_MEMORY;
 681                 }
 682         }
 683
 684         *n_groups = n_unix_groups;
 685
 686         for (i = 0; i < *n_groups; i++) {
 687                 if (!NT_STATUS_IS_OK(gid_to_sid(&(*groups)[i], (*unix_groups)[i]))) {
 688                         DEBUG(1, ("get_user_groups_from_local_sam: failed to convert gid %ld to a sid!\n", (long int)(*unix_groups)[i+1]));
 689                         SAFE_FREE(*groups);
 690                         SAFE_FREE(*unix_groups);
 691                         return NT_STATUS_NO_SUCH_USER;
 692                 }
 693         }
 694
 695         return NT_STATUS_OK;
 696 }
 697
 698 /***************************************************************************
 699  Make a user_info struct
 700 ***************************************************************************/
 701
 702 static NTSTATUS make_server_info(auth_serversupplied_info **server_info)
 703 {
 704         *server_info = malloc(sizeof(**server_info));
 705         if (!*server_info) {
 706                 DEBUG(0,("make_server_info: malloc failed!\n"));
 707                 return NT_STATUS_NO_MEMORY;
 708         }
 709         ZERO_STRUCTP(*server_info);
 710         return NT_STATUS_OK;
 711 }
 712
 713 /***************************************************************************
 714 Fill a server_info struct from a SAM_ACCOUNT with their groups
 715 ***************************************************************************/
 716
 717 static NTSTATUS add_user_groups(auth_serversupplied_info **server_info,
 718                                 SAM_ACCOUNT *sampass,
 719                                 uid_t uid, gid_t gid)
 720 {
 721         NTSTATUS nt_status;
 722         const DOM_SID *user_sid = pdb_get_user_sid(sampass);
 723         const DOM_SID *group_sid = pdb_get_group_sid(sampass);
 724         int       n_groupSIDs = 0;
 725         DOM_SID  *groupSIDs   = NULL;
 726         gid_t    *unix_groups = NULL;
 727         NT_USER_TOKEN *token;
 728         BOOL is_guest;
 729         uint32 rid;
 730
 731         nt_status = get_user_groups_from_local_sam(pdb_get_username(sampass),
 732                                                    uid, gid,
 733                                                    &n_groupSIDs, &groupSIDs,
 734                                                    &unix_groups);
 735         if (!NT_STATUS_IS_OK(nt_status)) {
 736                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
 737                 free_server_info(server_info);
 738                 return nt_status;
 739         }
 740
 741         is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
 742
 743         if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
 744                                                               n_groupSIDs, groupSIDs, is_guest,
 745                                                               &token)))
 746         {
 747                 DEBUG(4,("create_nt_user_token failed\n"));
 748                 SAFE_FREE(groupSIDs);
 749                 SAFE_FREE(unix_groups);
 750                 free_server_info(server_info);
 751                 return nt_status;
 752         }
 753
 754         SAFE_FREE(groupSIDs);
 755
 756         (*server_info)->n_groups = n_groupSIDs;
 757         (*server_info)->groups = unix_groups;
 758         (*server_info)->ptok = token;
 759
 760         return nt_status;
 761 }
 762
 763 /***************************************************************************
 764  Make (and fill) a user_info struct from a SAM_ACCOUNT
 765 ***************************************************************************/
 766
 767 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
 768                               SAM_ACCOUNT *sampass)
 769 {
 770         NTSTATUS nt_status;
 771
 772         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info)))
 773                 return nt_status;
 774
 775         (*server_info)->sam_account    = sampass;
 776
 777         if (!NT_STATUS_IS_OK(nt_status = sid_to_uid(pdb_get_user_sid(sampass), &((*server_info)->uid))))
 778                 return nt_status;
 779
 780         if (!NT_STATUS_IS_OK(nt_status = sid_to_gid(pdb_get_group_sid(sampass), &((*server_info)->gid))))
 781                 return nt_status;
 782
 783         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, sampass,
 784                                                          (*server_info)->uid, (*server_info)->gid)))
 785                 return nt_status;
 786
 787         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 788         DEBUG(5,("make_server_info_sam: made server info for user %s\n",
 789                  pdb_get_username((*server_info)->sam_account)));
 790
 791         return nt_status;
 792 }
 793
 794 /***************************************************************************
 795  Make (and fill) a user_info struct from a 'struct passwd' by conversion
 796  to a SAM_ACCOUNT
 797 ***************************************************************************/
 798
 799 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
 800 {
 801         NTSTATUS nt_status;
 802         SAM_ACCOUNT *sampass = NULL;
 803         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
 804                 return nt_status;
 805         }
 806         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
 807                 return nt_status;
 808         }
 809
 810         (*server_info)->sam_account    = sampass;
 811
 812         if (!NT_STATUS_IS_OK(nt_status = add_user_groups(server_info, sampass, pwd->pw_uid, pwd->pw_gid))) {
 813                 return nt_status;
 814         }
 815
 816         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 817         (*server_info)->uid = pwd->pw_uid;
 818         (*server_info)->gid = pwd->pw_gid;
 819         return nt_status;
 820 }
 821
 822 /***************************************************************************
 823  Make (and fill) a user_info struct for a guest login.
 824 ***************************************************************************/
 825
 826 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
 827 {
 828         NTSTATUS nt_status;
 829         SAM_ACCOUNT *sampass = NULL;
 830         DOM_SID guest_sid;
 831
 832         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
 833                 return nt_status;
 834         }
 835
 836         sid_copy(&guest_sid, get_global_sam_sid());
 837         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
 838
 839         become_root();
 840         if (!pdb_getsampwsid(sampass, &guest_sid)) {
 841                 unbecome_root();
 842                 return NT_STATUS_NO_SUCH_USER;
 843         }
 844         unbecome_root();
 845
 846         nt_status = make_server_info_sam(server_info, sampass);
 847
 848         if (NT_STATUS_IS_OK(nt_status)) {
 849                 (*server_info)->guest = True;
 850         }
 851
 852         return nt_status;
 853 }
 854
 855 /***************************************************************************
 856  Purely internal function for make_server_info_info3
 857  Fill the sam account from getpwnam
 858 ***************************************************************************/
 859 static NTSTATUS fill_sam_account(const char *domain,
 860                                  const char *username,
 861                                  uid_t *uid, gid_t *gid,
 862                                  SAM_ACCOUNT **sam_account)
 863 {
 864         fstring dom_user;
 865         struct passwd *passwd;
 866
 867         fstr_sprintf(dom_user, "%s%s%s",
 868                      domain, lp_winbind_separator(), username);
 869
 870         passwd = Get_Pwnam(dom_user);
 871
 872         if ( (passwd == NULL) && is_myworkgroup(domain) ) {
 873                 /* For our own domain also try unqualified */
 874                 passwd = Get_Pwnam(username);
 875         }
 876
 877         if (passwd == NULL)
 878                 return NT_STATUS_NO_SUCH_USER;
 879
 880         *uid = passwd->pw_uid;
 881         *gid = passwd->pw_gid;
 882
 883         return pdb_init_sam_pw(sam_account, passwd);
 884 }
 885
 886 /***************************************************************************
 887  Make a server_info struct from the info3 returned by a domain logon
 888 ***************************************************************************/
 889
 890 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
 891                                 const char *internal_username,
 892                                 const char *sent_nt_username,
 893                                 const char *domain,
 894                                 auth_serversupplied_info **server_info,
 895                                 NET_USER_INFO_3 *info3)
 896 {
 897         NTSTATUS nt_status = NT_STATUS_OK;
 898
 899         const char *nt_domain;
 900         const char *nt_username;
 901
 902         SAM_ACCOUNT *sam_account = NULL;
 903         DOM_SID user_sid;
 904         DOM_SID group_sid;
 905
 906         struct passwd *passwd;
 907
 908         unid_t u_id, g_id;
 909         uid_t uid;
 910         gid_t gid;
 911         int u_type, g_type;
 912
 913         int n_lgroupSIDs;
 914         DOM_SID *lgroupSIDs   = NULL;
 915
 916         gid_t *unix_groups = NULL;
 917         NT_USER_TOKEN *token;
 918
 919         DOM_SID *all_group_SIDs;
 920         size_t i;
 921
 922         /*
 923            Here is where we should check the list of
 924            trusted domains, and verify that the SID
 925            matches.
 926         */
 927
 928         sid_copy(&user_sid, &info3->dom_sid.sid);
 929         if (!sid_append_rid(&user_sid, info3->user_rid)) {
 930                 return NT_STATUS_INVALID_PARAMETER;
 931         }
 932
 933         sid_copy(&group_sid, &info3->dom_sid.sid);
 934         if (!sid_append_rid(&group_sid, info3->group_rid)) {
 935                 return NT_STATUS_INVALID_PARAMETER;
 936         }
 937
 938         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
 939                 /* If the server didn't give us one, just use the one we sent them */
 940                 nt_username = sent_nt_username;
 941         }
 942
 943         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
 944                 /* If the server didn't give us one, just use the one we sent them */
 945                 domain = domain;
 946         }
 947
 948         u_type = ID_USERID;
 949         g_type = ID_GROUPID;
 950
 951         /* we are trying to check that idmap isn't stuffing us over - does this
 952            user actually exist? */
 953         if (NT_STATUS_IS_OK(idmap_get_id_from_sid(&u_id, &u_type, &user_sid))
 954             && NT_STATUS_IS_OK(idmap_get_id_from_sid(&g_id, &g_type, &group_sid))
 955             && ((passwd = getpwuid_alloc(u_id.uid)))) {
 956
 957                 nt_status = pdb_init_sam_pw(&sam_account, passwd);
 958
 959                 uid = passwd->pw_uid;
 960                 gid = passwd->pw_gid;
 961
 962                 /* we should check this is the same name */
 963
 964                 passwd_free(&passwd);
 965         } else {
 966
 967                 /* User not from winbind - try and find them by getpwnam() */
 968                 nt_status = fill_sam_account(nt_domain,
 969                                              internal_username,
 970                                              &uid, &gid,
 971                                              &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(nt_domain,
 978                                                      internal_username,
 979                                                      &uid, &gid,
 980                                                      &sam_account);
 981                 }
 982         }
 983
 984         if (!NT_STATUS_IS_OK(nt_status)) {
 985                 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
 986                 return nt_status;
 987         }
 988
 989         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
 990                 pdb_free_sam(&sam_account);
 991                 return NT_STATUS_UNSUCCESSFUL;
 992         }
 993
 994         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
 995                 pdb_free_sam(&sam_account);
 996                 return NT_STATUS_UNSUCCESSFUL;
 997         }
 998
 999         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
1000                 pdb_free_sam(&sam_account);
1001                 return NT_STATUS_NO_MEMORY;
1002         }
1003
1004         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
1005                 pdb_free_sam(&sam_account);
1006                 return NT_STATUS_NO_MEMORY;
1007         }
1008
1009         if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)), PDB_CHANGED)) {
1010                 pdb_free_sam(&sam_account);
1011                 return NT_STATUS_NO_MEMORY;
1012         }
1013
1014         if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) {
1015                 pdb_free_sam(&sam_account);
1016                 return NT_STATUS_NO_MEMORY;
1017         }
1018
1019         if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) {
1020                 pdb_free_sam(&sam_account);
1021                 return NT_STATUS_NO_MEMORY;
1022         }
1023
1024         if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) {
1025                 pdb_free_sam(&sam_account);
1026                 return NT_STATUS_NO_MEMORY;
1027         }
1028
1029         if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) {
1030                 pdb_free_sam(&sam_account);
1031                 return NT_STATUS_NO_MEMORY;
1032         }
1033
1034         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info))) {
1035                 DEBUG(4, ("make_server_info failed!\n"));
1036                 pdb_free_sam(&sam_account);
1037                 return nt_status;
1038         }
1039
1040         /* save this here to _net_sam_logon() doesn't fail (it assumes a
1041            valid SAM_ACCOUNT) */
1042
1043         (*server_info)->sam_account = sam_account;
1044
1045         /* Fill in the unix info we found on the way */
1046
1047         (*server_info)->sam_fill_level = SAM_FILL_ALL;
1048         (*server_info)->uid = uid;
1049         (*server_info)->gid = gid;
1050
1051         /* Store the user group information in the server_info
1052            returned to the caller. */
1053
1054         if (!NT_STATUS_IS_OK(nt_status
1055                              = get_user_groups_from_local_sam(pdb_get_username(sam_account),
1056                                                               uid, gid,
1057                                                               &n_lgroupSIDs,
1058                                                               &lgroupSIDs,
1059                                                               &unix_groups)))
1060         {
1061                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
1062                 return nt_status;
1063         }
1064
1065         (*server_info)->groups = unix_groups;
1066         (*server_info)->n_groups = n_lgroupSIDs;
1067
1068         /* Create a 'combined' list of all SIDs we might want in the SD */
1069         all_group_SIDs   = malloc(sizeof(DOM_SID) *
1070                                   (n_lgroupSIDs + info3->num_groups2 +
1071                                    info3->num_other_sids));
1072         if (!all_group_SIDs) {
1073                 DEBUG(0, ("malloc() failed for DOM_SID list!\n"));
1074                 SAFE_FREE(lgroupSIDs);
1075                 return NT_STATUS_NO_MEMORY;
1076         }
1077
1078         /* Copy the 'local' sids */
1079         memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
1080         SAFE_FREE(lgroupSIDs);
1081
1082         /* and create (by appending rids) the 'domain' sids */
1083         for (i = 0; i < info3->num_groups2; i++) {
1084                 sid_copy(&all_group_SIDs[i+n_lgroupSIDs], &(info3->dom_sid.sid));
1085                 if (!sid_append_rid(&all_group_SIDs[i+n_lgroupSIDs], info3->gids[i].g_rid)) {
1086                         nt_status = NT_STATUS_INVALID_PARAMETER;
1087                         DEBUG(3,("could not append additional group rid 0x%x\n",
1088                                 info3->gids[i].g_rid));
1089                         SAFE_FREE(lgroupSIDs);
1090                         return nt_status;
1091                 }
1092         }
1093
1094         /* Copy 'other' sids.  We need to do sid filtering here to
1095            prevent possible elevation of privileges.  See:
1096
1097            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1098          */
1099
1100         for (i = 0; i < info3->num_other_sids; i++)
1101                 sid_copy(&all_group_SIDs[
1102                                  n_lgroupSIDs + info3->num_groups2 + i],
1103                          &info3->other_sids[i].sid);
1104
1105         /* Where are the 'global' sids... */
1106
1107         /* can the user be guest? if yes, where is it stored? */
1108         if (!NT_STATUS_IS_OK(
1109                     nt_status = create_nt_user_token(
1110                             &user_sid, &group_sid,
1111                             n_lgroupSIDs + info3->num_groups2 + info3->num_other_sids,
1112                             all_group_SIDs, False, &token))) {
1113                 DEBUG(4,("create_nt_user_token failed\n"));
1114                 SAFE_FREE(all_group_SIDs);
1115                 return nt_status;
1116         }
1117
1118         (*server_info)->ptok = token;
1119
1120         SAFE_FREE(all_group_SIDs);
1121
1122         memcpy((*server_info)->session_key, info3->user_sess_key, sizeof((*server_info)->session_key)/* 16 */);
1123         memcpy((*server_info)->first_8_lm_hash, info3->padding, 8);
1124
1125         return NT_STATUS_OK;
1126 }
1127
1128 /***************************************************************************
1129  Free a user_info struct
1130 ***************************************************************************/
1131
1132 void free_user_info(auth_usersupplied_info **user_info)
1133 {
1134         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1135         if (*user_info != NULL) {
1136                 if ((*user_info)->smb_name.str) {
1137                         DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1138                 }
1139                 SAFE_FREE((*user_info)->smb_name.str);
1140                 SAFE_FREE((*user_info)->internal_username.str);
1141                 SAFE_FREE((*user_info)->client_domain.str);
1142                 SAFE_FREE((*user_info)->domain.str);
1143                 SAFE_FREE((*user_info)->wksta_name.str);
1144                 data_blob_free(&(*user_info)->lm_resp);
1145                 data_blob_free(&(*user_info)->nt_resp);
1146                 SAFE_FREE((*user_info)->interactive_password);
1147                 data_blob_clear_free(&(*user_info)->plaintext_password);
1148                 ZERO_STRUCT(**user_info);
1149         }
1150         SAFE_FREE(*user_info);
1151 }
1152
1153 /***************************************************************************
1154  Clear out a server_info struct that has been allocated
1155 ***************************************************************************/
1156
1157 void free_server_info(auth_serversupplied_info **server_info)
1158 {
1159         DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1160         if (*server_info != NULL) {
1161                 pdb_free_sam(&(*server_info)->sam_account);
1162
1163                 /* call pam_end here, unless we know we are keeping it */
1164                 delete_nt_token( &(*server_info)->ptok );
1165                 SAFE_FREE((*server_info)->groups);
1166                 ZERO_STRUCT(**server_info);
1167         }
1168         SAFE_FREE(*server_info);
1169 }
1170
1171 /***************************************************************************
1172  Make an auth_methods struct
1173 ***************************************************************************/
1174
1175 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1176 {
1177         if (!auth_context) {
1178                 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1179         }
1180
1181         if (!auth_method) {
1182                 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1183         }
1184
1185         *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1186         if (!*auth_method) {
1187                 DEBUG(0,("make_auth_method: malloc failed!\n"));
1188                 return False;
1189         }
1190         ZERO_STRUCTP(*auth_method);
1191
1192         return True;
1193 }
1194
1195 /****************************************************************************
1196  Delete a SID token.
1197 ****************************************************************************/
1198
1199 void delete_nt_token(NT_USER_TOKEN **pptoken)
1200 {
1201     if (*pptoken) {
1202             NT_USER_TOKEN *ptoken = *pptoken;
1203             SAFE_FREE( ptoken->user_sids );
1204             ZERO_STRUCTP(ptoken);
1205     }
1206     SAFE_FREE(*pptoken);
1207 }
1208
1209 /****************************************************************************
1210  Duplicate a SID token.
1211 ****************************************************************************/
1212
1213 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1214 {
1215         NT_USER_TOKEN *token;
1216
1217         if (!ptoken)
1218                 return NULL;
1219
1220     if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1221         return NULL;
1222
1223     ZERO_STRUCTP(token);
1224
1225     if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1226         SAFE_FREE(token);
1227         return NULL;
1228     }
1229
1230     token->num_sids = ptoken->num_sids;
1231
1232         return token;
1233 }
1234
1235 /**
1236  * Squash an NT_STATUS in line with security requirements.
1237  * In an attempt to avoid giving the whole game away when users
1238  * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
1239  * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
1240  * (session setups in particular).
1241  *
1242  * @param nt_status NTSTATUS input for squashing.
1243  * @return the 'squashed' nt_status
1244  **/
1245
1246 NTSTATUS nt_status_squash(NTSTATUS nt_status)
1247 {
1248         if NT_STATUS_IS_OK(nt_status) {
1249                 return nt_status;
1250         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
1251                 /* Match WinXP and don't give the game away */
1252                 return NT_STATUS_LOGON_FAILURE;
1253
1254         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
1255                 /* Match WinXP and don't give the game away */
1256                 return NT_STATUS_LOGON_FAILURE;
1257         } else {
1258                 return nt_status;
1259         }
1260 }
1261
1262
1263