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 pstring global_myname;
  30 extern DOM_SID global_sid_World;
  31 extern DOM_SID global_sid_Network;
  32 extern DOM_SID global_sid_Builtin_Guests;
  33 extern DOM_SID global_sid_Authenticated_Users;
  34
  35
  36 /****************************************************************************
  37  Create a UNIX user on demand.
  38 ****************************************************************************/
  39
  40 static int smb_create_user(const char *unix_user, const char *homedir)
  41 {
  42         pstring add_script;
  43         int ret;
  44
  45         pstrcpy(add_script, lp_adduser_script());
  46         if (! *add_script)
  47                 return -1;
  48         all_string_sub(add_script, "%u", unix_user, sizeof(pstring));
  49         if (homedir)
  50                 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
  51         ret = smbrun(add_script,NULL);
  52         DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
  53         return ret;
  54 }
  55
  56 /****************************************************************************
  57  Add and Delete UNIX users on demand, based on NTSTATUS codes.
  58 ****************************************************************************/
  59
  60 void smb_user_control(const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info, NTSTATUS nt_status)
  61 {
  62         struct passwd *pwd=NULL;
  63
  64         if (NT_STATUS_IS_OK(nt_status)) {
  65
  66                 if (!(server_info->sam_fill_level & SAM_FILL_UNIX)) {
  67
  68                         /*
  69                          * User validated ok against Domain controller.
  70                          * If the admin wants us to try and create a UNIX
  71                          * user on the fly, do so.
  72                          */
  73
  74                         if(lp_adduser_script() && !(pwd = Get_Pwnam(user_info->internal_username.str))) {
  75                                 smb_create_user(user_info->internal_username.str, NULL);
  76                         }
  77                 }
  78         }
  79 }
  80
  81 /****************************************************************************
  82  Create an auth_usersupplied_data structure
  83 ****************************************************************************/
  84
  85 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
  86                                const char *smb_name,
  87                                const char *internal_username,
  88                                const char *client_domain,
  89                                const char *domain,
  90                                const char *wksta_name,
  91                                DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
  92                                DATA_BLOB plaintext,
  93                                uint32 auth_flags, BOOL encrypted)
  94 {
  95
  96         DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
  97
  98         *user_info = malloc(sizeof(**user_info));
  99         if (!user_info) {
 100                 DEBUG(0,("malloc failed for user_info (size %d)\n", sizeof(*user_info)));
 101                 return NT_STATUS_NO_MEMORY;
 102         }
 103
 104         ZERO_STRUCTP(*user_info);
 105
 106         DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
 107
 108         (*user_info)->smb_name.str = strdup(smb_name);
 109         if ((*user_info)->smb_name.str) {
 110                 (*user_info)->smb_name.len = strlen(smb_name);
 111         } else {
 112                 free_user_info(user_info);
 113                 return NT_STATUS_NO_MEMORY;
 114         }
 115
 116         (*user_info)->internal_username.str = strdup(internal_username);
 117         if ((*user_info)->internal_username.str) {
 118                 (*user_info)->internal_username.len = strlen(internal_username);
 119         } else {
 120                 free_user_info(user_info);
 121                 return NT_STATUS_NO_MEMORY;
 122         }
 123
 124         (*user_info)->domain.str = strdup(domain);
 125         if ((*user_info)->domain.str) {
 126                 (*user_info)->domain.len = strlen(domain);
 127         } else {
 128                 free_user_info(user_info);
 129                 return NT_STATUS_NO_MEMORY;
 130         }
 131
 132         (*user_info)->client_domain.str = strdup(client_domain);
 133         if ((*user_info)->client_domain.str) {
 134                 (*user_info)->client_domain.len = strlen(client_domain);
 135         } else {
 136                 free_user_info(user_info);
 137                 return NT_STATUS_NO_MEMORY;
 138         }
 139
 140         (*user_info)->wksta_name.str = strdup(wksta_name);
 141         if ((*user_info)->wksta_name.str) {
 142                 (*user_info)->wksta_name.len = strlen(wksta_name);
 143         } else {
 144                 free_user_info(user_info);
 145                 return NT_STATUS_NO_MEMORY;
 146         }
 147
 148         DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
 149
 150         (*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length);
 151         (*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length);
 152         (*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length);
 153
 154         (*user_info)->encrypted = encrypted;
 155         (*user_info)->auth_flags = auth_flags;
 156
 157         DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
 158
 159         return NT_STATUS_OK;
 160 }
 161
 162 /****************************************************************************
 163  Create an auth_usersupplied_data structure after appropriate mapping.
 164 ****************************************************************************/
 165
 166 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
 167                             const char *smb_name,
 168                             const char *client_domain,
 169                             const char *wksta_name,
 170                             DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
 171                             DATA_BLOB plaintext,
 172                             uint32 ntlmssp_flags, BOOL encrypted)
 173 {
 174         const char *domain;
 175         fstring internal_username;
 176         fstrcpy(internal_username, smb_name);
 177         map_username(internal_username);
 178
 179         DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
 180               client_domain, smb_name, wksta_name));
 181
 182         if (lp_allow_trusted_domains() && *client_domain) {
 183
 184                 /* the client could have given us a workstation name
 185                    or other crap for the workgroup - we really need a
 186                    way of telling if this domain name is one of our
 187                    trusted domain names
 188
 189                    Also don't allow "" as a domain, fixes a Win9X bug
 190                    where it doens't supply a domain for logon script
 191                    'net use' commands.
 192
 193                    The way I do it here is by checking if the fully
 194                    qualified username exists. This is rather reliant
 195                    on winbind, but until we have a better method this
 196                    will have to do
 197                 */
 198
 199                 domain = client_domain;
 200
 201                 if ((smb_name) && (*smb_name)) { /* Don't do this for guests */
 202                         char *user = NULL;
 203                         if (asprintf(&user, "%s%s%s",
 204                                  client_domain, lp_winbind_separator(),
 205                                  smb_name) < 0) {
 206                                 DEBUG(0, ("make_user_info_map: asprintf() failed!\n"));
 207                                 return NT_STATUS_NO_MEMORY;
 208                         }
 209
 210                         DEBUG(5, ("make_user_info_map: testing for user %s\n", user));
 211
 212                         if (Get_Pwnam(user) == NULL) {
 213                                 DEBUG(5, ("make_user_info_map: test for user %s failed\n", user));
 214                                 domain = lp_workgroup();
 215                                 DEBUG(5, ("make_user_info_map: trusted domain %s doesn't appear to exist, using %s\n",
 216                                           client_domain, domain));
 217                         } else {
 218                                 DEBUG(5, ("make_user_info_map: using trusted domain %s\n", domain));
 219                         }
 220                         SAFE_FREE(user);
 221                 }
 222         } else {
 223                 domain = lp_workgroup();
 224         }
 225
 226         return make_user_info(user_info,
 227                               smb_name, internal_username,
 228                               client_domain, domain,
 229                               wksta_name,
 230                               lm_pwd, nt_pwd,
 231                               plaintext,
 232                               ntlmssp_flags, encrypted);
 233
 234 }
 235
 236 /****************************************************************************
 237  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 238  Decrypt and encrypt the passwords.
 239 ****************************************************************************/
 240
 241 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
 242                                      const char *smb_name,
 243                                      const char *client_domain,
 244                                      const char *wksta_name,
 245                                      const uchar *lm_network_pwd, int lm_pwd_len,
 246                                      const uchar *nt_network_pwd, int nt_pwd_len)
 247 {
 248         BOOL ret;
 249         NTSTATUS nt_status;
 250         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
 251         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
 252         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 253         uint32 auth_flags = AUTH_FLAG_NONE;
 254
 255         if (lm_pwd_len)
 256                 auth_flags |= AUTH_FLAG_LM_RESP;
 257         if (nt_pwd_len == 24) {
 258                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 259         } else if (nt_pwd_len != 0) {
 260                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 261         }
 262
 263         nt_status = make_user_info_map(user_info,
 264                                       smb_name, client_domain,
 265                                   wksta_name,
 266                                       lm_blob, nt_blob,
 267                                       plaintext_blob,
 268                                       auth_flags, True);
 269
 270         ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 271
 272         data_blob_free(&lm_blob);
 273         data_blob_free(&nt_blob);
 274         return ret;
 275 }
 276
 277 /****************************************************************************
 278  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 279  Decrypt and encrypt the passwords.
 280 ****************************************************************************/
 281
 282 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
 283                                          const char *smb_name,
 284                                          const char *client_domain,
 285                                          const char *wksta_name,
 286                                          const uchar chal[8],
 287                                          const uchar lm_interactive_pwd[16],
 288                                          const uchar nt_interactive_pwd[16],
 289                                          const uchar *dc_sess_key)
 290 {
 291         char lm_pwd[16];
 292         char nt_pwd[16];
 293         unsigned char local_lm_response[24];
 294         unsigned char local_nt_response[24];
 295         unsigned char key[16];
 296         uint32 auth_flags = AUTH_FLAG_NONE;
 297
 298         ZERO_STRUCT(key);
 299         memcpy(key, dc_sess_key, 8);
 300
 301         if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
 302         if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
 303
 304 #ifdef DEBUG_PASSWORD
 305         DEBUG(100,("key:"));
 306         dump_data(100, (char *)key, sizeof(key));
 307
 308         DEBUG(100,("lm owf password:"));
 309         dump_data(100, lm_pwd, sizeof(lm_pwd));
 310
 311         DEBUG(100,("nt owf password:"));
 312         dump_data(100, nt_pwd, sizeof(nt_pwd));
 313 #endif
 314
 315         SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
 316         SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
 317
 318 #ifdef DEBUG_PASSWORD
 319         DEBUG(100,("decrypt of lm owf password:"));
 320         dump_data(100, lm_pwd, sizeof(lm_pwd));
 321
 322         DEBUG(100,("decrypt of nt owf password:"));
 323         dump_data(100, nt_pwd, sizeof(nt_pwd));
 324 #endif
 325
 326         SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
 327         SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
 328
 329         /* Password info paranoia */
 330         ZERO_STRUCT(lm_pwd);
 331         ZERO_STRUCT(nt_pwd);
 332         ZERO_STRUCT(key);
 333
 334         {
 335                 BOOL ret;
 336                 NTSTATUS nt_status;
 337                 DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
 338                 DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
 339                 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 340
 341                 if (lm_interactive_pwd)
 342                         auth_flags |= AUTH_FLAG_LM_RESP;
 343                 if (nt_interactive_pwd)
 344                         auth_flags |= AUTH_FLAG_NTLM_RESP;
 345
 346                 nt_status = make_user_info_map(user_info,
 347                                                smb_name, client_domain,
 348                                                wksta_name,
 349                                                local_lm_blob,
 350                                                local_nt_blob,
 351                                                plaintext_blob,
 352                                                auth_flags, True);
 353
 354                 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 355                 data_blob_free(&local_lm_blob);
 356                 data_blob_free(&local_nt_blob);
 357                 return ret;
 358         }
 359 }
 360
 361
 362 /****************************************************************************
 363  Create an auth_usersupplied_data structure
 364 ****************************************************************************/
 365
 366 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
 367                               const char *smb_name,
 368                               const char *client_domain,
 369                               const uint8 chal[8],
 370                               DATA_BLOB plaintext_password)
 371 {
 372
 373         DATA_BLOB local_lm_blob;
 374         DATA_BLOB local_nt_blob;
 375         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 376         uint32 auth_flags = AUTH_FLAG_NONE;
 377
 378         /*
 379          * Not encrypted - do so.
 380          */
 381
 382         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n"));
 383
 384         if (plaintext_password.data) {
 385                 unsigned char local_lm_response[24];
 386
 387 #ifdef DEBUG_PASSWORD
 388                 DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length));
 389                 dump_data(100, plaintext_password.data, plaintext_password.length);
 390 #endif
 391
 392                 SMBencrypt( (const uchar *)plaintext_password.data, (const uchar*)chal, local_lm_response);
 393                 local_lm_blob = data_blob(local_lm_response, 24);
 394
 395                 /* We can't do an NT hash here, as the password needs to be
 396                    case insensitive */
 397                 local_nt_blob = data_blob(NULL, 0);
 398
 399                 auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP);
 400         } else {
 401                 local_lm_blob = data_blob(NULL, 0);
 402                 local_nt_blob = data_blob(NULL, 0);
 403         }
 404
 405         ret = make_user_info_map(user_info, smb_name,
 406                                  client_domain,
 407                                  get_remote_machine_name(),
 408                                  local_lm_blob,
 409                                  local_nt_blob,
 410                                  plaintext_password,
 411                                  auth_flags, False);
 412
 413         data_blob_free(&local_lm_blob);
 414         return NT_STATUS_IS_OK(ret) ? True : False;
 415 }
 416
 417 /****************************************************************************
 418  Create an auth_usersupplied_data structure
 419 ****************************************************************************/
 420
 421 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
 422                                       const char *smb_name,
 423                                       const char *client_domain,
 424                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 425 {
 426         uint32 auth_flags = AUTH_FLAG_NONE;
 427
 428         DATA_BLOB no_plaintext_blob = data_blob(NULL, 0);
 429
 430         if (lm_resp.length == 24) {
 431                 auth_flags |= AUTH_FLAG_LM_RESP;
 432         }
 433         if (nt_resp.length == 0) {
 434         } else if (nt_resp.length == 24) {
 435                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 436         } else {
 437                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 438         }
 439
 440         return make_user_info_map(user_info, smb_name,
 441                                  client_domain,
 442                                  get_remote_machine_name(),
 443                                  lm_resp,
 444                                  nt_resp,
 445                                  no_plaintext_blob,
 446                                  auth_flags, True);
 447 }
 448
 449 /****************************************************************************
 450  Create a guest user_info blob, for anonymous authenticaion.
 451 ****************************************************************************/
 452
 453 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
 454 {
 455         DATA_BLOB lm_blob = data_blob(NULL, 0);
 456         DATA_BLOB nt_blob = data_blob(NULL, 0);
 457         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 458         uint32 auth_flags = AUTH_FLAG_NONE;
 459         NTSTATUS nt_status;
 460
 461         nt_status = make_user_info(user_info,
 462                               "","",
 463                               "","",
 464                               "",
 465                               nt_blob, lm_blob,
 466                               plaintext_blob,
 467                               auth_flags, True);
 468
 469         return NT_STATUS_IS_OK(nt_status) ? True : False;
 470 }
 471
 472 /****************************************************************************
 473  prints a NT_USER_TOKEN to debug output.
 474 ****************************************************************************/
 475
 476 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
 477 {
 478         fstring sid_str;
 479         int     i;
 480
 481         if (!token) {
 482                 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
 483                 return;
 484         }
 485
 486         DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n",
 487                                     sid_to_string(sid_str, &token->user_sids[0]) ));
 488         DEBUGADDC(dbg_class, dbg_lev, ("contains %i SIDs\n", token->num_sids));
 489         for (i = 0; i < token->num_sids; i++)
 490                 DEBUGADDC(dbg_class, dbg_lev, ("SID[%3i]: %s\n", i,
 491                                                sid_to_string(sid_str, &token->user_sids[i])));
 492 }
 493
 494 /****************************************************************************
 495  prints a UNIX 'token' to debug output.
 496 ****************************************************************************/
 497
 498 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid, int n_groups, gid_t *groups)
 499 {
 500         int     i;
 501         DEBUGC(dbg_class, dbg_lev, ("UNIX token of user %ld\n", (long int)uid));
 502
 503         DEBUGADDC(dbg_class, dbg_lev, ("Primary group is %ld and contains %i supplementary groups\n", (long int)gid, n_groups));
 504         for (i = 0; i < n_groups; i++)
 505                 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
 506                         (long int)groups[i]));
 507 }
 508
 509 /****************************************************************************
 510  Create the SID list for this user.
 511 ****************************************************************************/
 512
 513 static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid,
 514                                      int n_groupSIDs, DOM_SID *groupSIDs,
 515                                      BOOL is_guest, NT_USER_TOKEN **token)
 516 {
 517         NTSTATUS       nt_status = NT_STATUS_OK;
 518         NT_USER_TOKEN *ptoken;
 519         int i;
 520         int sid_ndx;
 521
 522         if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
 523                 DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
 524                 nt_status = NT_STATUS_NO_MEMORY;
 525                 return nt_status;
 526         }
 527
 528         ZERO_STRUCTP(ptoken);
 529
 530         ptoken->num_sids = n_groupSIDs + 5;
 531
 532         if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
 533                 DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
 534                 nt_status = NT_STATUS_NO_MEMORY;
 535                 return nt_status;
 536         }
 537
 538         memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
 539
 540         /*
 541          * Note - user SID *MUST* be first in token !
 542          * se_access_check depends on this.
 543          *
 544          * Primary group SID is second in token. Convention.
 545          */
 546
 547         sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
 548         if (group_sid)
 549                 sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
 550
 551         /*
 552          * Finally add the "standard" SIDs.
 553          * The only difference between guest and "anonymous" (which we
 554          * don't really support) is the addition of Authenticated_Users.
 555          */
 556
 557         sid_copy(&ptoken->user_sids[2], &global_sid_World);
 558         sid_copy(&ptoken->user_sids[3], &global_sid_Network);
 559
 560         if (is_guest)
 561                 sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
 562         else
 563                 sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
 564
 565         sid_ndx = 5; /* next available spot */
 566
 567         for (i = 0; i < n_groupSIDs; i++) {
 568                 int check_sid_idx;
 569                 for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
 570                         if (sid_equal(&ptoken->user_sids[check_sid_idx],
 571                                       &groupSIDs[i])) {
 572                                 break;
 573                         }
 574                 }
 575
 576                 if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
 577                         sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
 578                 } else {
 579                         ptoken->num_sids--;
 580                 }
 581         }
 582
 583         debug_nt_user_token(DBGC_AUTH, 10, ptoken);
 584
 585         *token = ptoken;
 586
 587         return nt_status;
 588 }
 589
 590 /****************************************************************************
 591  Create the SID list for this user.
 592 ****************************************************************************/
 593
 594 NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
 595 {
 596         DOM_SID user_sid;
 597         DOM_SID group_sid;
 598         DOM_SID *group_sids;
 599         NT_USER_TOKEN *token;
 600         int i;
 601
 602         if (!uid_to_sid(&user_sid, uid)) {
 603                 return NULL;
 604         }
 605         if (!gid_to_sid(&group_sid, gid)) {
 606                 return NULL;
 607         }
 608
 609         group_sids   = malloc(sizeof(DOM_SID) * ngroups);
 610         if (!group_sids) {
 611                 DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
 612                 return NULL;
 613         }
 614
 615         for (i = 0; i < ngroups; i++) {
 616                 if (!gid_to_sid(&(group_sids)[i], (groups)[i])) {
 617                         DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
 618                         SAFE_FREE(group_sids);
 619                         return NULL;
 620                 }
 621         }
 622
 623         if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid,
 624                                                   ngroups, group_sids, is_guest, &token))) {
 625                 SAFE_FREE(group_sids);
 626                 return NULL;
 627         }
 628
 629         SAFE_FREE(group_sids);
 630
 631         return token;
 632 }
 633
 634 /******************************************************************************
 635  * this function returns the groups (SIDs) of the local SAM the user is in.
 636  * If this samba server is a DC of the domain the user belongs to, it returns
 637  * both domain groups and local / builtin groups. If the user is in a trusted
 638  * domain, or samba is a member server of a domain, then this function returns
 639  * local and builtin groups the user is a member of.
 640  *
 641  * currently this is a hack, as there is no sam implementation that is capable
 642  * of groups.
 643  ******************************************************************************/
 644
 645 static NTSTATUS get_user_groups_from_local_sam(const DOM_SID *user_sid,
 646                                                int *n_groups, DOM_SID **groups, gid_t **unix_groups)
 647 {
 648         uid_t             uid;
 649         enum SID_NAME_USE snu;
 650         fstring           str;
 651         int               n_unix_groups;
 652         int               i;
 653         struct passwd    *usr;
 654
 655         *n_groups = 0;
 656         *groups   = NULL;
 657
 658         if (!sid_to_uid(user_sid,  &uid, &snu)) {
 659                 DEBUG(2, ("get_user_groups_from_local_sam: Failed to convert user SID %s to a uid!\n",
 660                           sid_to_string(str, user_sid)));
 661                 /* This might be a non-unix account */
 662                 return NT_STATUS_OK;
 663         }
 664
 665         /*
 666          * This is _essential_ to prevent occasional segfaults when
 667          * winbind can't find uid -> username mapping
 668          */
 669         if (!(usr = getpwuid_alloc(uid))) {
 670                 DEBUG(0, ("Couldn't find passdb structure for UID = %d ! Aborting.\n", uid));
 671                 return NT_STATUS_NO_SUCH_USER;
 672         };
 673
 674         n_unix_groups = groups_max();
 675         if ((*unix_groups = malloc( sizeof(gid_t) * groups_max() ) ) == NULL) {
 676                 DEBUG(0, ("get_user_groups_from_local_sam: Out of memory allocating unix group list\n"));
 677                 passwd_free(&usr);
 678                 return NT_STATUS_NO_MEMORY;
 679         }
 680
 681         if (sys_getgrouplist(usr->pw_name, usr->pw_gid, *unix_groups, &n_unix_groups) == -1) {
 682                 *unix_groups = Realloc(unix_groups, sizeof(gid_t) * n_unix_groups);
 683                 if (sys_getgrouplist(usr->pw_name, usr->pw_gid, *unix_groups, &n_unix_groups) == -1) {
 684                         DEBUG(0, ("get_user_groups_from_local_sam: failed to get the unix group list\n"));
 685                         SAFE_FREE(unix_groups);
 686                         passwd_free(&usr);
 687                         return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
 688                 }
 689         }
 690
 691         debug_unix_user_token(DBGC_CLASS, 5, usr->pw_uid, usr->pw_gid, n_unix_groups, *unix_groups);
 692
 693         passwd_free(&usr);
 694
 695         if (n_unix_groups > 0) {
 696                 *groups   = malloc(sizeof(DOM_SID) * n_unix_groups);
 697                 if (!*groups) {
 698                         DEBUG(0, ("get_user_group_from_local_sam: malloc() failed for DOM_SID list!\n"));
 699                         SAFE_FREE(unix_groups);
 700                         return NT_STATUS_NO_MEMORY;
 701                 }
 702         }
 703
 704         *n_groups = n_unix_groups;
 705
 706         for (i = 0; i < *n_groups; i++) {
 707                 if (!gid_to_sid(&(*groups)[i], (*unix_groups)[i])) {
 708                         DEBUG(1, ("get_user_groups_from_local_sam: failed to convert gid %ld to a sid!\n", (long int)unix_groups[i+1]));
 709                         SAFE_FREE(groups);
 710                         SAFE_FREE(unix_groups);
 711                         return NT_STATUS_NO_SUCH_USER;
 712                 }
 713         }
 714
 715         return NT_STATUS_OK;
 716 }
 717
 718 /***************************************************************************
 719  Make a user_info struct
 720 ***************************************************************************/
 721
 722 static NTSTATUS make_server_info(auth_serversupplied_info **server_info, SAM_ACCOUNT *sampass)
 723 {
 724         *server_info = malloc(sizeof(**server_info));
 725         if (!*server_info) {
 726                 DEBUG(0,("make_server_info: malloc failed!\n"));
 727                 return NT_STATUS_NO_MEMORY;
 728         }
 729         ZERO_STRUCTP(*server_info);
 730
 731         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 732         (*server_info)->sam_account    = sampass;
 733
 734         return NT_STATUS_OK;
 735 }
 736
 737 /***************************************************************************
 738  Make (and fill) a user_info struct from a SAM_ACCOUNT
 739 ***************************************************************************/
 740
 741 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
 742                               SAM_ACCOUNT *sampass)
 743 {
 744         NTSTATUS nt_status = NT_STATUS_OK;
 745         const DOM_SID *user_sid = pdb_get_user_sid(sampass);
 746         const DOM_SID *group_sid = pdb_get_group_sid(sampass);
 747         int       n_groupSIDs = 0;
 748         DOM_SID  *groupSIDs   = NULL;
 749         gid_t    *unix_groups = NULL;
 750         NT_USER_TOKEN *token;
 751         BOOL is_guest;
 752         uint32 rid;
 753
 754         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sampass))) {
 755                 return nt_status;
 756         }
 757
 758         if (!NT_STATUS_IS_OK(nt_status
 759                              = get_user_groups_from_local_sam(pdb_get_user_sid(sampass),
 760                 &n_groupSIDs, &groupSIDs, &unix_groups)))
 761         {
 762                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
 763                 free_server_info(server_info);
 764                 return nt_status;
 765         }
 766
 767         is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
 768
 769         if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
 770                                                               n_groupSIDs, groupSIDs, is_guest,
 771                                                               &token)))
 772         {
 773                 DEBUG(4,("create_nt_user_token failed\n"));
 774                 SAFE_FREE(groupSIDs);
 775                 SAFE_FREE(unix_groups);
 776                 free_server_info(server_info);
 777                 return nt_status;
 778         }
 779
 780         SAFE_FREE(groupSIDs);
 781
 782         (*server_info)->n_groups = n_groupSIDs;
 783         (*server_info)->groups = unix_groups;
 784
 785         (*server_info)->ptok = token;
 786
 787         DEBUG(5,("make_server_info_sam: made server info for user %s\n",
 788                  pdb_get_username((*server_info)->sam_account)));
 789
 790         return nt_status;
 791 }
 792
 793 /***************************************************************************
 794  Make (and fill) a user_info struct from a 'struct passwd' by conversion
 795  to a SAM_ACCOUNT
 796 ***************************************************************************/
 797
 798 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
 799 {
 800         NTSTATUS nt_status;
 801         SAM_ACCOUNT *sampass = NULL;
 802         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
 803                 return nt_status;
 804         }
 805         return make_server_info_sam(server_info, sampass);
 806 }
 807
 808 /***************************************************************************
 809  Make (and fill) a user_info struct for a guest login.
 810 ***************************************************************************/
 811
 812 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
 813 {
 814         NTSTATUS nt_status;
 815         SAM_ACCOUNT *sampass = NULL;
 816         DOM_SID guest_sid;
 817
 818         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
 819                 return nt_status;
 820         }
 821
 822         sid_copy(&guest_sid, get_global_sam_sid());
 823         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
 824
 825         if (!pdb_getsampwsid(sampass, &guest_sid)) {
 826                 return NT_STATUS_NO_SUCH_USER;
 827         }
 828
 829         nt_status = make_server_info_sam(server_info, sampass);
 830
 831         (*server_info)->guest = True;
 832
 833         return nt_status;
 834 }
 835
 836 /***************************************************************************
 837  Make a server_info struct from the info3 returned by a domain logon
 838 ***************************************************************************/
 839
 840 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
 841                                 const char *internal_username,
 842                                 const char *sent_nt_username,
 843                                 const char *domain,
 844                                 auth_serversupplied_info **server_info,
 845                                 NET_USER_INFO_3 *info3)
 846 {
 847         NTSTATUS nt_status = NT_STATUS_OK;
 848
 849         const char *nt_domain;
 850         const char *nt_username;
 851
 852         SAM_ACCOUNT *sam_account = NULL;
 853         DOM_SID user_sid;
 854         DOM_SID group_sid;
 855
 856         struct passwd *passwd;
 857
 858         uid_t uid;
 859         gid_t gid;
 860
 861         int n_lgroupSIDs;
 862         DOM_SID *lgroupSIDs   = NULL;
 863
 864         gid_t *unix_groups = NULL;
 865         NT_USER_TOKEN *token;
 866
 867         DOM_SID *all_group_SIDs;
 868         int i;
 869
 870         /*
 871            Here is where we should check the list of
 872            trusted domains, and verify that the SID
 873            matches.
 874         */
 875
 876         sid_copy(&user_sid, &info3->dom_sid.sid);
 877         if (!sid_append_rid(&user_sid, info3->user_rid)) {
 878                 return NT_STATUS_INVALID_PARAMETER;
 879         }
 880
 881         sid_copy(&group_sid, &info3->dom_sid.sid);
 882         if (!sid_append_rid(&group_sid, info3->group_rid)) {
 883                 return NT_STATUS_INVALID_PARAMETER;
 884         }
 885
 886         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
 887                 /* If the server didn't give us one, just use the one we sent them */
 888                 nt_username = sent_nt_username;
 889         }
 890
 891         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
 892                 /* If the server didn't give us one, just use the one we sent them */
 893                 domain = domain;
 894         }
 895
 896         if (winbind_sid_to_uid(&uid, &user_sid)
 897             && winbind_sid_to_gid(&gid, &group_sid)
 898             && ((passwd = getpwuid_alloc(uid)))) {
 899                 nt_status = pdb_init_sam_pw(&sam_account, passwd);
 900                 passwd_free(&passwd);
 901         } else {
 902                 char *dom_user;
 903                 dom_user = talloc_asprintf(mem_ctx, "%s%s%s",
 904                                            nt_domain,
 905                                            lp_winbind_separator(),
 906                                            internal_username);
 907
 908                 if (!dom_user) {
 909                         DEBUG(0, ("talloc_asprintf failed!\n"));
 910                         return NT_STATUS_NO_MEMORY;
 911                 } else {
 912
 913                         if (!(passwd = Get_Pwnam(dom_user))
 914                                 /* Only lookup local for the local
 915                                    domain, we don't want this for
 916                                    trusted domains */
 917                             && strequal(nt_domain, lp_workgroup())) {
 918                                 passwd = Get_Pwnam(internal_username);
 919                         }
 920
 921                         if (!passwd) {
 922                                 return NT_STATUS_NO_SUCH_USER;
 923                         } else {
 924                                 nt_status = pdb_init_sam_pw(&sam_account, passwd);
 925                         }
 926                 }
 927         }
 928
 929         if (!NT_STATUS_IS_OK(nt_status)) {
 930                 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
 931                 return nt_status;
 932         }
 933
 934         if (!pdb_set_user_sid(sam_account, &user_sid)) {
 935                 pdb_free_sam(&sam_account);
 936                 return NT_STATUS_UNSUCCESSFUL;
 937         }
 938
 939         if (!pdb_set_group_sid(sam_account, &group_sid)) {
 940                 pdb_free_sam(&sam_account);
 941                 return NT_STATUS_UNSUCCESSFUL;
 942         }
 943
 944         if (!pdb_set_nt_username(sam_account, nt_username)) {
 945                 pdb_free_sam(&sam_account);
 946                 return NT_STATUS_NO_MEMORY;
 947         }
 948
 949         if (!pdb_set_domain(sam_account, nt_domain)) {
 950                 pdb_free_sam(&sam_account);
 951                 return NT_STATUS_NO_MEMORY;
 952         }
 953
 954         if (!pdb_set_fullname(sam_account, pdb_unistr2_convert(&(info3->uni_full_name)))) {
 955                 pdb_free_sam(&sam_account);
 956                 return NT_STATUS_NO_MEMORY;
 957         }
 958
 959         if (!pdb_set_logon_script(sam_account, pdb_unistr2_convert(&(info3->uni_logon_script)), True)) {
 960                 pdb_free_sam(&sam_account);
 961                 return NT_STATUS_NO_MEMORY;
 962         }
 963
 964         if (!pdb_set_profile_path(sam_account, pdb_unistr2_convert(&(info3->uni_profile_path)), True)) {
 965                 pdb_free_sam(&sam_account);
 966                 return NT_STATUS_NO_MEMORY;
 967         }
 968
 969         if (!pdb_set_homedir(sam_account, pdb_unistr2_convert(&(info3->uni_home_dir)), True)) {
 970                 pdb_free_sam(&sam_account);
 971                 return NT_STATUS_NO_MEMORY;
 972         }
 973
 974         if (!pdb_set_dir_drive(sam_account, pdb_unistr2_convert(&(info3->uni_dir_drive)), True)) {
 975                 pdb_free_sam(&sam_account);
 976                 return NT_STATUS_NO_MEMORY;
 977         }
 978
 979         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sam_account))) {
 980                 DEBUG(4, ("make_server_info failed!\n"));
 981                 pdb_free_sam(&sam_account);
 982                 return nt_status;
 983         }
 984
 985         /* Store the user group information in the server_info
 986            returned to the caller. */
 987
 988         if (!NT_STATUS_IS_OK(nt_status
 989                              = get_user_groups_from_local_sam(&user_sid,
 990                                                               &n_lgroupSIDs,
 991                                                               &lgroupSIDs,
 992                                                               &unix_groups)))
 993         {
 994                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
 995                 return nt_status;
 996         }
 997
 998         (*server_info)->groups = unix_groups;
 999         (*server_info)->n_groups = n_lgroupSIDs;
1000
1001         /* Create a 'combined' list of all SIDs we might want in the SD */
1002         all_group_SIDs   = malloc(sizeof(DOM_SID) *
1003                                   (n_lgroupSIDs + info3->num_groups2 +
1004                                    info3->num_other_sids));
1005         if (!all_group_SIDs) {
1006                 DEBUG(0, ("create_nt_token_info3: malloc() failed for DOM_SID list!\n"));
1007                 SAFE_FREE(lgroupSIDs);
1008                 return NT_STATUS_NO_MEMORY;
1009         }
1010
1011         /* Copy the 'local' sids */
1012         memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
1013         SAFE_FREE(lgroupSIDs);
1014
1015         /* and create (by appending rids) the 'domain' sids */
1016         for (i = 0; i < info3->num_groups2; i++) {
1017                 sid_copy(&all_group_SIDs[i+n_lgroupSIDs], &(info3->dom_sid.sid));
1018                 if (!sid_append_rid(&all_group_SIDs[i+n_lgroupSIDs], info3->gids[i].g_rid)) {
1019                         nt_status = NT_STATUS_INVALID_PARAMETER;
1020                         DEBUG(3,("create_nt_token_info3: could not append additional group rid 0x%x\n",
1021                                 info3->gids[i].g_rid));
1022                         SAFE_FREE(lgroupSIDs);
1023                         return nt_status;
1024                 }
1025         }
1026
1027         /* Copy 'other' sids.  We need to do sid filtering here to
1028            prevent possible elevation of privileges.  See:
1029
1030            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1031          */
1032
1033         for (i = 0; i < info3->num_other_sids; i++)
1034                 sid_copy(&all_group_SIDs[
1035                                  n_lgroupSIDs + info3->num_groups2 + i],
1036                          &info3->other_sids[i].sid);
1037
1038         /* Where are the 'global' sids... */
1039
1040         /* can the user be guest? if yes, where is it stored? */
1041         if (!NT_STATUS_IS_OK(
1042                     nt_status = create_nt_user_token(
1043                             &user_sid, &group_sid,
1044                             n_lgroupSIDs + info3->num_groups2 + info3->num_other_sids,
1045                             all_group_SIDs, False, &token))) {
1046                 DEBUG(4,("create_nt_user_token failed\n"));
1047                 SAFE_FREE(all_group_SIDs);
1048                 return nt_status;
1049         }
1050
1051         (*server_info)->ptok = token;
1052
1053         SAFE_FREE(all_group_SIDs);
1054
1055         return NT_STATUS_OK;
1056 }
1057
1058 /***************************************************************************
1059  Free a user_info struct
1060 ***************************************************************************/
1061
1062 void free_user_info(auth_usersupplied_info **user_info)
1063 {
1064         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1065         if (*user_info != NULL) {
1066                 if ((*user_info)->smb_name.str) {
1067                         DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1068                 }
1069                 SAFE_FREE((*user_info)->smb_name.str);
1070                 SAFE_FREE((*user_info)->internal_username.str);
1071                 SAFE_FREE((*user_info)->client_domain.str);
1072                 SAFE_FREE((*user_info)->domain.str);
1073                 SAFE_FREE((*user_info)->wksta_name.str);
1074                 data_blob_free(&(*user_info)->lm_resp);
1075                 data_blob_free(&(*user_info)->nt_resp);
1076                 SAFE_FREE((*user_info)->interactive_password);
1077                 data_blob_clear_free(&(*user_info)->plaintext_password);
1078                 ZERO_STRUCT(**user_info);
1079         }
1080         SAFE_FREE(*user_info);
1081 }
1082
1083 /***************************************************************************
1084  Clear out a server_info struct that has been allocated
1085 ***************************************************************************/
1086
1087 void free_server_info(auth_serversupplied_info **server_info)
1088 {
1089         DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1090         if (*server_info != NULL) {
1091                 pdb_free_sam(&(*server_info)->sam_account);
1092
1093                 /* call pam_end here, unless we know we are keeping it */
1094                 delete_nt_token( &(*server_info)->ptok );
1095                 SAFE_FREE((*server_info)->groups);
1096                 ZERO_STRUCT(**server_info);
1097         }
1098         SAFE_FREE(*server_info);
1099 }
1100
1101 /***************************************************************************
1102  Make an auth_methods struct
1103 ***************************************************************************/
1104
1105 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1106 {
1107         if (!auth_context) {
1108                 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1109         }
1110
1111         if (!auth_method) {
1112                 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1113         }
1114
1115         *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1116         if (!*auth_method) {
1117                 DEBUG(0,("make_auth_method: malloc failed!\n"));
1118                 return False;
1119         }
1120         ZERO_STRUCTP(*auth_method);
1121
1122         return True;
1123 }
1124
1125 /****************************************************************************
1126  Delete a SID token.
1127 ****************************************************************************/
1128
1129 void delete_nt_token(NT_USER_TOKEN **pptoken)
1130 {
1131     if (*pptoken) {
1132             NT_USER_TOKEN *ptoken = *pptoken;
1133             SAFE_FREE( ptoken->user_sids );
1134             ZERO_STRUCTP(ptoken);
1135     }
1136     SAFE_FREE(*pptoken);
1137 }
1138
1139 /****************************************************************************
1140  Duplicate a SID token.
1141 ****************************************************************************/
1142
1143 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1144 {
1145         NT_USER_TOKEN *token;
1146
1147         if (!ptoken)
1148                 return NULL;
1149
1150     if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1151         return NULL;
1152
1153     ZERO_STRUCTP(token);
1154
1155     if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1156         SAFE_FREE(token);
1157         return NULL;
1158     }
1159
1160     token->num_sids = ptoken->num_sids;
1161
1162         return token;
1163 }
1164
1165 /**
1166  * Squash an NT_STATUS in line with security requirements.
1167  * In an attempt to avoid giving the whole game away when users
1168  * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
1169  * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
1170  * (session setups in particular).
1171  *
1172  * @param nt_status NTSTATUS input for squashing.
1173  * @return the 'squashed' nt_status
1174  **/
1175
1176 NTSTATUS nt_status_squash(NTSTATUS nt_status)
1177 {
1178         if NT_STATUS_IS_OK(nt_status) {
1179                 return nt_status;
1180         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
1181                 /* Match WinXP and don't give the game away */
1182                 return NT_STATUS_LOGON_FAILURE;
1183
1184         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
1185                 /* Match WinXP and don't give the game away */
1186                 return NT_STATUS_LOGON_FAILURE;
1187         } else {
1188                 return nt_status;
1189         }
1190 }
1191
1192
1193