source3/auth/auth_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Authentication utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Andrew Bartlett 2001
   6    Copyright (C) Jeremy Allison 2000-2001
   7    Copyright (C) Rafal Szczesniak 2002
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22 */
  23
  24 #include "includes.h"
  25
  26 #undef DBGC_CLASS
  27 #define DBGC_CLASS DBGC_AUTH
  28
  29 extern DOM_SID global_sid_World;
  30 extern DOM_SID global_sid_Network;
  31 extern DOM_SID global_sid_Builtin_Guests;
  32 extern DOM_SID global_sid_Authenticated_Users;
  33
  34
  35 /****************************************************************************
  36  Create a UNIX user on demand.
  37 ****************************************************************************/
  38
  39 static int smb_create_user(const char *unix_user, 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_user, sizeof(pstring));
  48         if (homedir)
  49                 all_string_sub(add_script, "%H", homedir, sizeof(pstring));
  50         ret = smbrun(add_script,NULL);
  51         DEBUG(3,("smb_create_user: Running the command `%s' gave %d\n",add_script,ret));
  52         return ret;
  53 }
  54
  55 /****************************************************************************
  56  Add and Delete UNIX users on demand, based on NTSTATUS codes.
  57 ****************************************************************************/
  58
  59 void smb_user_control(const auth_usersupplied_info *user_info, auth_serversupplied_info *server_info, NTSTATUS nt_status)
  60 {
  61         struct passwd *pwd=NULL;
  62
  63         if (NT_STATUS_IS_OK(nt_status)) {
  64
  65                 if (!(server_info->sam_fill_level & SAM_FILL_UNIX)) {
  66
  67                         /*
  68                          * User validated ok against Domain controller.
  69                          * If the admin wants us to try and create a UNIX
  70                          * user on the fly, do so.
  71                          */
  72
  73                         if(lp_adduser_script() && !(pwd = Get_Pwnam(user_info->internal_username.str))) {
  74                                 smb_create_user(user_info->internal_username.str, NULL);
  75                         }
  76                 }
  77         }
  78 }
  79
  80 /****************************************************************************
  81  Create an auth_usersupplied_data structure
  82 ****************************************************************************/
  83
  84 static NTSTATUS make_user_info(auth_usersupplied_info **user_info,
  85                                const char *smb_name,
  86                                const char *internal_username,
  87                                const char *client_domain,
  88                                const char *domain,
  89                                const char *wksta_name,
  90                                DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
  91                                DATA_BLOB plaintext,
  92                                uint32 auth_flags, BOOL encrypted)
  93 {
  94
  95         DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
  96
  97         *user_info = malloc(sizeof(**user_info));
  98         if (!user_info) {
  99                 DEBUG(0,("malloc failed for user_info (size %d)\n", sizeof(*user_info)));
 100                 return NT_STATUS_NO_MEMORY;
 101         }
 102
 103         ZERO_STRUCTP(*user_info);
 104
 105         DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
 106
 107         (*user_info)->smb_name.str = strdup(smb_name);
 108         if ((*user_info)->smb_name.str) {
 109                 (*user_info)->smb_name.len = strlen(smb_name);
 110         } else {
 111                 free_user_info(user_info);
 112                 return NT_STATUS_NO_MEMORY;
 113         }
 114
 115         (*user_info)->internal_username.str = strdup(internal_username);
 116         if ((*user_info)->internal_username.str) {
 117                 (*user_info)->internal_username.len = strlen(internal_username);
 118         } else {
 119                 free_user_info(user_info);
 120                 return NT_STATUS_NO_MEMORY;
 121         }
 122
 123         (*user_info)->domain.str = strdup(domain);
 124         if ((*user_info)->domain.str) {
 125                 (*user_info)->domain.len = strlen(domain);
 126         } else {
 127                 free_user_info(user_info);
 128                 return NT_STATUS_NO_MEMORY;
 129         }
 130
 131         (*user_info)->client_domain.str = strdup(client_domain);
 132         if ((*user_info)->client_domain.str) {
 133                 (*user_info)->client_domain.len = strlen(client_domain);
 134         } else {
 135                 free_user_info(user_info);
 136                 return NT_STATUS_NO_MEMORY;
 137         }
 138
 139         (*user_info)->wksta_name.str = strdup(wksta_name);
 140         if ((*user_info)->wksta_name.str) {
 141                 (*user_info)->wksta_name.len = strlen(wksta_name);
 142         } else {
 143                 free_user_info(user_info);
 144                 return NT_STATUS_NO_MEMORY;
 145         }
 146
 147         DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
 148
 149         (*user_info)->lm_resp = data_blob(lm_pwd.data, lm_pwd.length);
 150         (*user_info)->nt_resp = data_blob(nt_pwd.data, nt_pwd.length);
 151         (*user_info)->plaintext_password = data_blob(plaintext.data, plaintext.length);
 152
 153         (*user_info)->encrypted = encrypted;
 154         (*user_info)->auth_flags = auth_flags;
 155
 156         DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
 157
 158         return NT_STATUS_OK;
 159 }
 160
 161 /****************************************************************************
 162  Create an auth_usersupplied_data structure after appropriate mapping.
 163 ****************************************************************************/
 164
 165 NTSTATUS make_user_info_map(auth_usersupplied_info **user_info,
 166                             const char *smb_name,
 167                             const char *client_domain,
 168                             const char *wksta_name,
 169                             DATA_BLOB lm_pwd, DATA_BLOB nt_pwd,
 170                             DATA_BLOB plaintext,
 171                             uint32 ntlmssp_flags, BOOL encrypted)
 172 {
 173         const char *domain;
 174         fstring internal_username;
 175         fstrcpy(internal_username, smb_name);
 176         map_username(internal_username);
 177
 178         DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
 179               client_domain, smb_name, wksta_name));
 180
 181         if (lp_allow_trusted_domains() && *client_domain) {
 182
 183                 /* the client could have given us a workstation name
 184                    or other crap for the workgroup - we really need a
 185                    way of telling if this domain name is one of our
 186                    trusted domain names
 187
 188                    Also don't allow "" as a domain, fixes a Win9X bug
 189                    where it doens't supply a domain for logon script
 190                    'net use' commands.
 191
 192                    The way I do it here is by checking if the fully
 193                    qualified username exists. This is rather reliant
 194                    on winbind, but until we have a better method this
 195                    will have to do
 196                 */
 197
 198                 domain = client_domain;
 199
 200                 if ((smb_name) && (*smb_name)) { /* Don't do this for guests */
 201                         char *user = NULL;
 202                         if (asprintf(&user, "%s%s%s",
 203                                  client_domain, lp_winbind_separator(),
 204                                  smb_name) < 0) {
 205                                 DEBUG(0, ("make_user_info_map: asprintf() failed!\n"));
 206                                 return NT_STATUS_NO_MEMORY;
 207                         }
 208
 209                         DEBUG(5, ("make_user_info_map: testing for user %s\n", user));
 210
 211                         if (Get_Pwnam(user) == NULL) {
 212                                 DEBUG(5, ("make_user_info_map: test for user %s failed\n", user));
 213                                 domain = lp_workgroup();
 214                                 DEBUG(5, ("make_user_info_map: trusted domain %s doesn't appear to exist, using %s\n",
 215                                           client_domain, domain));
 216                         } else {
 217                                 DEBUG(5, ("make_user_info_map: using trusted domain %s\n", domain));
 218                         }
 219                         SAFE_FREE(user);
 220                 }
 221         } else {
 222                 domain = lp_workgroup();
 223         }
 224
 225         return make_user_info(user_info,
 226                               smb_name, internal_username,
 227                               client_domain, domain,
 228                               wksta_name,
 229                               lm_pwd, nt_pwd,
 230                               plaintext,
 231                               ntlmssp_flags, encrypted);
 232
 233 }
 234
 235 /****************************************************************************
 236  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 237  Decrypt and encrypt the passwords.
 238 ****************************************************************************/
 239
 240 BOOL make_user_info_netlogon_network(auth_usersupplied_info **user_info,
 241                                      const char *smb_name,
 242                                      const char *client_domain,
 243                                      const char *wksta_name,
 244                                      const uchar *lm_network_pwd, int lm_pwd_len,
 245                                      const uchar *nt_network_pwd, int nt_pwd_len)
 246 {
 247         BOOL ret;
 248         NTSTATUS nt_status;
 249         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
 250         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
 251         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 252         uint32 auth_flags = AUTH_FLAG_NONE;
 253
 254         if (lm_pwd_len)
 255                 auth_flags |= AUTH_FLAG_LM_RESP;
 256         if (nt_pwd_len == 24) {
 257                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 258         } else if (nt_pwd_len != 0) {
 259                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 260         }
 261
 262         nt_status = make_user_info_map(user_info,
 263                                       smb_name, client_domain,
 264                                   wksta_name,
 265                                       lm_blob, nt_blob,
 266                                       plaintext_blob,
 267                                       auth_flags, True);
 268
 269         ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 270
 271         data_blob_free(&lm_blob);
 272         data_blob_free(&nt_blob);
 273         return ret;
 274 }
 275
 276 /****************************************************************************
 277  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 278  Decrypt and encrypt the passwords.
 279 ****************************************************************************/
 280
 281 BOOL make_user_info_netlogon_interactive(auth_usersupplied_info **user_info,
 282                                          const char *smb_name,
 283                                          const char *client_domain,
 284                                          const char *wksta_name,
 285                                          const uchar chal[8],
 286                                          const uchar lm_interactive_pwd[16],
 287                                          const uchar nt_interactive_pwd[16],
 288                                          const uchar *dc_sess_key)
 289 {
 290         char lm_pwd[16];
 291         char nt_pwd[16];
 292         unsigned char local_lm_response[24];
 293         unsigned char local_nt_response[24];
 294         unsigned char key[16];
 295         uint32 auth_flags = AUTH_FLAG_NONE;
 296
 297         ZERO_STRUCT(key);
 298         memcpy(key, dc_sess_key, 8);
 299
 300         if (lm_interactive_pwd) memcpy(lm_pwd, lm_interactive_pwd, sizeof(lm_pwd));
 301         if (nt_interactive_pwd) memcpy(nt_pwd, nt_interactive_pwd, sizeof(nt_pwd));
 302
 303 #ifdef DEBUG_PASSWORD
 304         DEBUG(100,("key:"));
 305         dump_data(100, (char *)key, sizeof(key));
 306
 307         DEBUG(100,("lm owf password:"));
 308         dump_data(100, lm_pwd, sizeof(lm_pwd));
 309
 310         DEBUG(100,("nt owf password:"));
 311         dump_data(100, nt_pwd, sizeof(nt_pwd));
 312 #endif
 313
 314         SamOEMhash((uchar *)lm_pwd, key, sizeof(lm_pwd));
 315         SamOEMhash((uchar *)nt_pwd, key, sizeof(nt_pwd));
 316
 317 #ifdef DEBUG_PASSWORD
 318         DEBUG(100,("decrypt of lm owf password:"));
 319         dump_data(100, lm_pwd, sizeof(lm_pwd));
 320
 321         DEBUG(100,("decrypt of nt owf password:"));
 322         dump_data(100, nt_pwd, sizeof(nt_pwd));
 323 #endif
 324
 325         SMBOWFencrypt((const unsigned char *)lm_pwd, chal, local_lm_response);
 326         SMBOWFencrypt((const unsigned char *)nt_pwd, chal, local_nt_response);
 327
 328         /* Password info paranoia */
 329         ZERO_STRUCT(lm_pwd);
 330         ZERO_STRUCT(nt_pwd);
 331         ZERO_STRUCT(key);
 332
 333         {
 334                 BOOL ret;
 335                 NTSTATUS nt_status;
 336                 DATA_BLOB local_lm_blob = data_blob(local_lm_response, sizeof(local_lm_response));
 337                 DATA_BLOB local_nt_blob = data_blob(local_nt_response, sizeof(local_nt_response));
 338                 DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 339
 340                 if (lm_interactive_pwd)
 341                         auth_flags |= AUTH_FLAG_LM_RESP;
 342                 if (nt_interactive_pwd)
 343                         auth_flags |= AUTH_FLAG_NTLM_RESP;
 344
 345                 nt_status = make_user_info_map(user_info,
 346                                                smb_name, client_domain,
 347                                                wksta_name,
 348                                                local_lm_blob,
 349                                                local_nt_blob,
 350                                                plaintext_blob,
 351                                                auth_flags, True);
 352
 353                 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 354                 data_blob_free(&local_lm_blob);
 355                 data_blob_free(&local_nt_blob);
 356                 return ret;
 357         }
 358 }
 359
 360
 361 /****************************************************************************
 362  Create an auth_usersupplied_data structure
 363 ****************************************************************************/
 364
 365 BOOL make_user_info_for_reply(auth_usersupplied_info **user_info,
 366                               const char *smb_name,
 367                               const char *client_domain,
 368                               const uint8 chal[8],
 369                               DATA_BLOB plaintext_password)
 370 {
 371
 372         DATA_BLOB local_lm_blob;
 373         DATA_BLOB local_nt_blob;
 374         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 375         uint32 auth_flags = AUTH_FLAG_NONE;
 376
 377         /*
 378          * Not encrypted - do so.
 379          */
 380
 381         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted format.\n"));
 382
 383         if (plaintext_password.data) {
 384                 unsigned char local_lm_response[24];
 385
 386 #ifdef DEBUG_PASSWORD
 387                 DEBUG(10,("Unencrypted password (len %d):\n",plaintext_password.length));
 388                 dump_data(100, plaintext_password.data, plaintext_password.length);
 389 #endif
 390
 391                 SMBencrypt( (const uchar *)plaintext_password.data, (const uchar*)chal, local_lm_response);
 392                 local_lm_blob = data_blob(local_lm_response, 24);
 393
 394                 /* We can't do an NT hash here, as the password needs to be
 395                    case insensitive */
 396                 local_nt_blob = data_blob(NULL, 0);
 397
 398                 auth_flags = (AUTH_FLAG_PLAINTEXT | AUTH_FLAG_LM_RESP);
 399         } else {
 400                 local_lm_blob = data_blob(NULL, 0);
 401                 local_nt_blob = data_blob(NULL, 0);
 402         }
 403
 404         ret = make_user_info_map(user_info, smb_name,
 405                                  client_domain,
 406                                  get_remote_machine_name(),
 407                                  local_lm_blob,
 408                                  local_nt_blob,
 409                                  plaintext_password,
 410                                  auth_flags, False);
 411
 412         data_blob_free(&local_lm_blob);
 413         return NT_STATUS_IS_OK(ret) ? True : False;
 414 }
 415
 416 /****************************************************************************
 417  Create an auth_usersupplied_data structure
 418 ****************************************************************************/
 419
 420 NTSTATUS make_user_info_for_reply_enc(auth_usersupplied_info **user_info,
 421                                       const char *smb_name,
 422                                       const char *client_domain,
 423                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 424 {
 425         uint32 auth_flags = AUTH_FLAG_NONE;
 426
 427         DATA_BLOB no_plaintext_blob = data_blob(NULL, 0);
 428
 429         if (lm_resp.length == 24) {
 430                 auth_flags |= AUTH_FLAG_LM_RESP;
 431         }
 432         if (nt_resp.length == 0) {
 433         } else if (nt_resp.length == 24) {
 434                 auth_flags |= AUTH_FLAG_NTLM_RESP;
 435         } else {
 436                 auth_flags |= AUTH_FLAG_NTLMv2_RESP;
 437         }
 438
 439         return make_user_info_map(user_info, smb_name,
 440                                  client_domain,
 441                                  get_remote_machine_name(),
 442                                  lm_resp,
 443                                  nt_resp,
 444                                  no_plaintext_blob,
 445                                  auth_flags, True);
 446 }
 447
 448 /****************************************************************************
 449  Create a guest user_info blob, for anonymous authenticaion.
 450 ****************************************************************************/
 451
 452 BOOL make_user_info_guest(auth_usersupplied_info **user_info)
 453 {
 454         DATA_BLOB lm_blob = data_blob(NULL, 0);
 455         DATA_BLOB nt_blob = data_blob(NULL, 0);
 456         DATA_BLOB plaintext_blob = data_blob(NULL, 0);
 457         uint32 auth_flags = AUTH_FLAG_NONE;
 458         NTSTATUS nt_status;
 459
 460         nt_status = make_user_info(user_info,
 461                               "","",
 462                               "","",
 463                               "",
 464                               nt_blob, lm_blob,
 465                               plaintext_blob,
 466                               auth_flags, True);
 467
 468         return NT_STATUS_IS_OK(nt_status) ? True : False;
 469 }
 470
 471 /****************************************************************************
 472  prints a NT_USER_TOKEN to debug output.
 473 ****************************************************************************/
 474
 475 void debug_nt_user_token(int dbg_class, int dbg_lev, NT_USER_TOKEN *token)
 476 {
 477         fstring sid_str;
 478         size_t     i;
 479
 480         if (!token) {
 481                 DEBUGC(dbg_class, dbg_lev, ("NT user token: (NULL)\n"));
 482                 return;
 483         }
 484
 485         DEBUGC(dbg_class, dbg_lev, ("NT user token of user %s\n",
 486                                     sid_to_string(sid_str, &token->user_sids[0]) ));
 487         DEBUGADDC(dbg_class, dbg_lev, ("contains %i SIDs\n", token->num_sids));
 488         for (i = 0; i < token->num_sids; i++)
 489                 DEBUGADDC(dbg_class, dbg_lev, ("SID[%3i]: %s\n", i,
 490                                                sid_to_string(sid_str, &token->user_sids[i])));
 491 }
 492
 493 /****************************************************************************
 494  prints a UNIX 'token' to debug output.
 495 ****************************************************************************/
 496
 497 void debug_unix_user_token(int dbg_class, int dbg_lev, uid_t uid, gid_t gid, int n_groups, gid_t *groups)
 498 {
 499         int     i;
 500         DEBUGC(dbg_class, dbg_lev, ("UNIX token of user %ld\n", (long int)uid));
 501
 502         DEBUGADDC(dbg_class, dbg_lev, ("Primary group is %ld and contains %i supplementary groups\n", (long int)gid, n_groups));
 503         for (i = 0; i < n_groups; i++)
 504                 DEBUGADDC(dbg_class, dbg_lev, ("Group[%3i]: %ld\n", i,
 505                         (long int)groups[i]));
 506 }
 507
 508 /****************************************************************************
 509  Create the SID list for this user.
 510 ****************************************************************************/
 511
 512 static NTSTATUS create_nt_user_token(const DOM_SID *user_sid, const DOM_SID *group_sid,
 513                                      int n_groupSIDs, DOM_SID *groupSIDs,
 514                                      BOOL is_guest, NT_USER_TOKEN **token)
 515 {
 516         NTSTATUS       nt_status = NT_STATUS_OK;
 517         NT_USER_TOKEN *ptoken;
 518         int i;
 519         int sid_ndx;
 520
 521         if ((ptoken = malloc( sizeof(NT_USER_TOKEN) ) ) == NULL) {
 522                 DEBUG(0, ("create_nt_token: Out of memory allocating token\n"));
 523                 nt_status = NT_STATUS_NO_MEMORY;
 524                 return nt_status;
 525         }
 526
 527         ZERO_STRUCTP(ptoken);
 528
 529         ptoken->num_sids = n_groupSIDs + 5;
 530
 531         if ((ptoken->user_sids = (DOM_SID *)malloc( sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
 532                 DEBUG(0, ("create_nt_token: Out of memory allocating SIDs\n"));
 533                 nt_status = NT_STATUS_NO_MEMORY;
 534                 return nt_status;
 535         }
 536
 537         memset((char*)ptoken->user_sids,0,sizeof(DOM_SID) * ptoken->num_sids);
 538
 539         /*
 540          * Note - user SID *MUST* be first in token !
 541          * se_access_check depends on this.
 542          *
 543          * Primary group SID is second in token. Convention.
 544          */
 545
 546         sid_copy(&ptoken->user_sids[PRIMARY_USER_SID_INDEX], user_sid);
 547         if (group_sid)
 548                 sid_copy(&ptoken->user_sids[PRIMARY_GROUP_SID_INDEX], group_sid);
 549
 550         /*
 551          * Finally add the "standard" SIDs.
 552          * The only difference between guest and "anonymous" (which we
 553          * don't really support) is the addition of Authenticated_Users.
 554          */
 555
 556         sid_copy(&ptoken->user_sids[2], &global_sid_World);
 557         sid_copy(&ptoken->user_sids[3], &global_sid_Network);
 558
 559         if (is_guest)
 560                 sid_copy(&ptoken->user_sids[4], &global_sid_Builtin_Guests);
 561         else
 562                 sid_copy(&ptoken->user_sids[4], &global_sid_Authenticated_Users);
 563
 564         sid_ndx = 5; /* next available spot */
 565
 566         for (i = 0; i < n_groupSIDs; i++) {
 567                 size_t check_sid_idx;
 568                 for (check_sid_idx = 1; check_sid_idx < ptoken->num_sids; check_sid_idx++) {
 569                         if (sid_equal(&ptoken->user_sids[check_sid_idx],
 570                                       &groupSIDs[i])) {
 571                                 break;
 572                         }
 573                 }
 574
 575                 if (check_sid_idx >= ptoken->num_sids) /* Not found already */ {
 576                         sid_copy(&ptoken->user_sids[sid_ndx++], &groupSIDs[i]);
 577                 } else {
 578                         ptoken->num_sids--;
 579                 }
 580         }
 581
 582         debug_nt_user_token(DBGC_AUTH, 10, ptoken);
 583
 584         *token = ptoken;
 585
 586         return nt_status;
 587 }
 588
 589 /****************************************************************************
 590  Create the SID list for this user.
 591 ****************************************************************************/
 592
 593 NT_USER_TOKEN *create_nt_token(uid_t uid, gid_t gid, int ngroups, gid_t *groups, BOOL is_guest)
 594 {
 595         DOM_SID user_sid;
 596         DOM_SID group_sid;
 597         DOM_SID *group_sids;
 598         NT_USER_TOKEN *token;
 599         int i;
 600
 601         if (!uid_to_sid(&user_sid, uid)) {
 602                 return NULL;
 603         }
 604         if (!gid_to_sid(&group_sid, gid)) {
 605                 return NULL;
 606         }
 607
 608         group_sids   = malloc(sizeof(DOM_SID) * ngroups);
 609         if (!group_sids) {
 610                 DEBUG(0, ("create_nt_token: malloc() failed for DOM_SID list!\n"));
 611                 return NULL;
 612         }
 613
 614         for (i = 0; i < ngroups; i++) {
 615                 if (!gid_to_sid(&(group_sids)[i], (groups)[i])) {
 616                         DEBUG(1, ("create_nt_token: failed to convert gid %ld to a sid!\n", (long int)groups[i]));
 617                         SAFE_FREE(group_sids);
 618                         return NULL;
 619                 }
 620         }
 621
 622         if (!NT_STATUS_IS_OK(create_nt_user_token(&user_sid, &group_sid,
 623                                                   ngroups, group_sids, is_guest, &token))) {
 624                 SAFE_FREE(group_sids);
 625                 return NULL;
 626         }
 627
 628         SAFE_FREE(group_sids);
 629
 630         return token;
 631 }
 632
 633 /******************************************************************************
 634  * this function returns the groups (SIDs) of the local SAM the user is in.
 635  * If this samba server is a DC of the domain the user belongs to, it returns
 636  * both domain groups and local / builtin groups. If the user is in a trusted
 637  * domain, or samba is a member server of a domain, then this function returns
 638  * local and builtin groups the user is a member of.
 639  *
 640  * currently this is a hack, as there is no sam implementation that is capable
 641  * of groups.
 642  ******************************************************************************/
 643
 644 static NTSTATUS get_user_groups_from_local_sam(const DOM_SID *user_sid,
 645                                                int *n_groups, DOM_SID **groups, gid_t **unix_groups)
 646 {
 647         uid_t             uid;
 648         enum SID_NAME_USE snu;
 649         fstring           str;
 650         int               n_unix_groups;
 651         int               i;
 652         struct passwd    *usr;
 653
 654         *n_groups = 0;
 655         *groups   = NULL;
 656
 657         if (!sid_to_uid(user_sid,  &uid, &snu)) {
 658                 DEBUG(2, ("get_user_groups_from_local_sam: Failed to convert user SID %s to a uid!\n",
 659                           sid_to_string(str, user_sid)));
 660                 /* This might be a non-unix account */
 661                 return NT_STATUS_OK;
 662         }
 663
 664         /*
 665          * This is _essential_ to prevent occasional segfaults when
 666          * winbind can't find uid -> username mapping
 667          */
 668         if (!(usr = getpwuid_alloc(uid))) {
 669                 DEBUG(0, ("Couldn't find passdb structure for UID = %d ! Aborting.\n", uid));
 670                 return NT_STATUS_NO_SUCH_USER;
 671         };
 672
 673         n_unix_groups = groups_max();
 674         if ((*unix_groups = malloc( sizeof(gid_t) * groups_max() ) ) == NULL) {
 675                 DEBUG(0, ("get_user_groups_from_local_sam: Out of memory allocating unix group list\n"));
 676                 passwd_free(&usr);
 677                 return NT_STATUS_NO_MEMORY;
 678         }
 679
 680         if (sys_getgrouplist(usr->pw_name, usr->pw_gid, *unix_groups, &n_unix_groups) == -1) {
 681                 *unix_groups = Realloc(*unix_groups, sizeof(gid_t) * n_unix_groups);
 682                 if (sys_getgrouplist(usr->pw_name, usr->pw_gid, *unix_groups, &n_unix_groups) == -1) {
 683                         DEBUG(0, ("get_user_groups_from_local_sam: failed to get the unix group list\n"));
 684                         SAFE_FREE(*unix_groups);
 685                         passwd_free(&usr);
 686                         return NT_STATUS_NO_SUCH_USER; /* what should this return value be? */
 687                 }
 688         }
 689
 690         debug_unix_user_token(DBGC_CLASS, 5, usr->pw_uid, usr->pw_gid, n_unix_groups, *unix_groups);
 691
 692         passwd_free(&usr);
 693
 694         if (n_unix_groups > 0) {
 695                 *groups   = malloc(sizeof(DOM_SID) * n_unix_groups);
 696                 if (!*groups) {
 697                         DEBUG(0, ("get_user_group_from_local_sam: malloc() failed for DOM_SID list!\n"));
 698                         SAFE_FREE(*unix_groups);
 699                         return NT_STATUS_NO_MEMORY;
 700                 }
 701         }
 702
 703         *n_groups = n_unix_groups;
 704
 705         for (i = 0; i < *n_groups; i++) {
 706                 if (!gid_to_sid(&(*groups)[i], (*unix_groups)[i])) {
 707                         DEBUG(1, ("get_user_groups_from_local_sam: failed to convert gid %ld to a sid!\n", (long int)(*unix_groups)[i+1]));
 708                         SAFE_FREE(groups);
 709                         SAFE_FREE(unix_groups);
 710                         return NT_STATUS_NO_SUCH_USER;
 711                 }
 712         }
 713
 714         return NT_STATUS_OK;
 715 }
 716
 717 /***************************************************************************
 718  Make a user_info struct
 719 ***************************************************************************/
 720
 721 static NTSTATUS make_server_info(auth_serversupplied_info **server_info, SAM_ACCOUNT *sampass)
 722 {
 723         *server_info = malloc(sizeof(**server_info));
 724         if (!*server_info) {
 725                 DEBUG(0,("make_server_info: malloc failed!\n"));
 726                 return NT_STATUS_NO_MEMORY;
 727         }
 728         ZERO_STRUCTP(*server_info);
 729
 730         (*server_info)->sam_fill_level = SAM_FILL_ALL;
 731         (*server_info)->sam_account    = sampass;
 732
 733         return NT_STATUS_OK;
 734 }
 735
 736 /***************************************************************************
 737  Make (and fill) a user_info struct from a SAM_ACCOUNT
 738 ***************************************************************************/
 739
 740 NTSTATUS make_server_info_sam(auth_serversupplied_info **server_info,
 741                               SAM_ACCOUNT *sampass)
 742 {
 743         NTSTATUS nt_status = NT_STATUS_OK;
 744         const DOM_SID *user_sid = pdb_get_user_sid(sampass);
 745         const DOM_SID *group_sid = pdb_get_group_sid(sampass);
 746         int       n_groupSIDs = 0;
 747         DOM_SID  *groupSIDs   = NULL;
 748         gid_t    *unix_groups = NULL;
 749         NT_USER_TOKEN *token;
 750         BOOL is_guest;
 751         uint32 rid;
 752
 753         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sampass))) {
 754                 return nt_status;
 755         }
 756
 757         if (!NT_STATUS_IS_OK(nt_status
 758                              = get_user_groups_from_local_sam(pdb_get_user_sid(sampass),
 759                 &n_groupSIDs, &groupSIDs, &unix_groups)))
 760         {
 761                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
 762                 free_server_info(server_info);
 763                 return nt_status;
 764         }
 765
 766         is_guest = (sid_peek_rid(user_sid, &rid) && rid == DOMAIN_USER_RID_GUEST);
 767
 768         if (!NT_STATUS_IS_OK(nt_status = create_nt_user_token(user_sid, group_sid,
 769                                                               n_groupSIDs, groupSIDs, is_guest,
 770                                                               &token)))
 771         {
 772                 DEBUG(4,("create_nt_user_token failed\n"));
 773                 SAFE_FREE(groupSIDs);
 774                 SAFE_FREE(unix_groups);
 775                 free_server_info(server_info);
 776                 return nt_status;
 777         }
 778
 779         SAFE_FREE(groupSIDs);
 780
 781         (*server_info)->n_groups = n_groupSIDs;
 782         (*server_info)->groups = unix_groups;
 783
 784         (*server_info)->ptok = token;
 785
 786         DEBUG(5,("make_server_info_sam: made server info for user %s\n",
 787                  pdb_get_username((*server_info)->sam_account)));
 788
 789         return nt_status;
 790 }
 791
 792 /***************************************************************************
 793  Make (and fill) a user_info struct from a 'struct passwd' by conversion
 794  to a SAM_ACCOUNT
 795 ***************************************************************************/
 796
 797 NTSTATUS make_server_info_pw(auth_serversupplied_info **server_info, const struct passwd *pwd)
 798 {
 799         NTSTATUS nt_status;
 800         SAM_ACCOUNT *sampass = NULL;
 801         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam_pw(&sampass, pwd))) {
 802                 return nt_status;
 803         }
 804         return make_server_info_sam(server_info, sampass);
 805 }
 806
 807 /***************************************************************************
 808  Make (and fill) a user_info struct for a guest login.
 809 ***************************************************************************/
 810
 811 NTSTATUS make_server_info_guest(auth_serversupplied_info **server_info)
 812 {
 813         NTSTATUS nt_status;
 814         SAM_ACCOUNT *sampass = NULL;
 815         DOM_SID guest_sid;
 816
 817         if (!NT_STATUS_IS_OK(nt_status = pdb_init_sam(&sampass))) {
 818                 return nt_status;
 819         }
 820
 821         sid_copy(&guest_sid, get_global_sam_sid());
 822         sid_append_rid(&guest_sid, DOMAIN_USER_RID_GUEST);
 823
 824         become_root();
 825         if (!pdb_getsampwsid(sampass, &guest_sid)) {
 826                 unbecome_root();
 827                 return NT_STATUS_NO_SUCH_USER;
 828         }
 829         unbecome_root();
 830
 831         nt_status = make_server_info_sam(server_info, sampass);
 832
 833         (*server_info)->guest = True;
 834
 835         return nt_status;
 836 }
 837
 838 /***************************************************************************
 839  Make a server_info struct from the info3 returned by a domain logon
 840 ***************************************************************************/
 841
 842 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
 843                                 const char *internal_username,
 844                                 const char *sent_nt_username,
 845                                 const char *domain,
 846                                 auth_serversupplied_info **server_info,
 847                                 NET_USER_INFO_3 *info3)
 848 {
 849         NTSTATUS nt_status = NT_STATUS_OK;
 850
 851         const char *nt_domain;
 852         const char *nt_username;
 853
 854         SAM_ACCOUNT *sam_account = NULL;
 855         DOM_SID user_sid;
 856         DOM_SID group_sid;
 857
 858         struct passwd *passwd;
 859
 860         uid_t uid;
 861         gid_t gid;
 862
 863         int n_lgroupSIDs;
 864         DOM_SID *lgroupSIDs   = NULL;
 865
 866         gid_t *unix_groups = NULL;
 867         NT_USER_TOKEN *token;
 868
 869         DOM_SID *all_group_SIDs;
 870         size_t i;
 871
 872         /*
 873            Here is where we should check the list of
 874            trusted domains, and verify that the SID
 875            matches.
 876         */
 877
 878         sid_copy(&user_sid, &info3->dom_sid.sid);
 879         if (!sid_append_rid(&user_sid, info3->user_rid)) {
 880                 return NT_STATUS_INVALID_PARAMETER;
 881         }
 882
 883         sid_copy(&group_sid, &info3->dom_sid.sid);
 884         if (!sid_append_rid(&group_sid, info3->group_rid)) {
 885                 return NT_STATUS_INVALID_PARAMETER;
 886         }
 887
 888         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3->uni_user_name)))) {
 889                 /* If the server didn't give us one, just use the one we sent them */
 890                 nt_username = sent_nt_username;
 891         }
 892
 893         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3->uni_logon_dom)))) {
 894                 /* If the server didn't give us one, just use the one we sent them */
 895                 domain = domain;
 896         }
 897
 898         if (winbind_sid_to_uid(&uid, &user_sid)
 899             && winbind_sid_to_gid(&gid, &group_sid)
 900             && ((passwd = getpwuid_alloc(uid)))) {
 901                 nt_status = pdb_init_sam_pw(&sam_account, passwd);
 902                 passwd_free(&passwd);
 903         } else {
 904                 char *dom_user;
 905                 dom_user = talloc_asprintf(mem_ctx, "%s%s%s",
 906                                            nt_domain,
 907                                            lp_winbind_separator(),
 908                                            internal_username);
 909
 910                 if (!dom_user) {
 911                         DEBUG(0, ("talloc_asprintf failed!\n"));
 912                         return NT_STATUS_NO_MEMORY;
 913                 } else {
 914
 915                         if (!(passwd = Get_Pwnam(dom_user))
 916                                 /* Only lookup local for the local
 917                                    domain, we don't want this for
 918                                    trusted domains */
 919                             && strequal(nt_domain, lp_workgroup())) {
 920                                 passwd = Get_Pwnam(internal_username);
 921                         }
 922
 923                         if (!passwd) {
 924                                 return NT_STATUS_NO_SUCH_USER;
 925                         } else {
 926                                 nt_status = pdb_init_sam_pw(&sam_account, passwd);
 927                         }
 928                 }
 929         }
 930
 931         if (!NT_STATUS_IS_OK(nt_status)) {
 932                 DEBUG(0, ("make_server_info_info3: pdb_init_sam failed!\n"));
 933                 return nt_status;
 934         }
 935
 936         if (!pdb_set_user_sid(sam_account, &user_sid, PDB_CHANGED)) {
 937                 pdb_free_sam(&sam_account);
 938                 return NT_STATUS_UNSUCCESSFUL;
 939         }
 940
 941         if (!pdb_set_group_sid(sam_account, &group_sid, PDB_CHANGED)) {
 942                 pdb_free_sam(&sam_account);
 943                 return NT_STATUS_UNSUCCESSFUL;
 944         }
 945
 946         if (!pdb_set_nt_username(sam_account, nt_username, PDB_CHANGED)) {
 947                 pdb_free_sam(&sam_account);
 948                 return NT_STATUS_NO_MEMORY;
 949         }
 950
 951         if (!pdb_set_domain(sam_account, nt_domain, PDB_CHANGED)) {
 952                 pdb_free_sam(&sam_account);
 953                 return NT_STATUS_NO_MEMORY;
 954         }
 955
 956         if (!pdb_set_fullname(sam_account, unistr2_static(&(info3->uni_full_name)), PDB_CHANGED)) {
 957                 pdb_free_sam(&sam_account);
 958                 return NT_STATUS_NO_MEMORY;
 959         }
 960
 961         if (!pdb_set_logon_script(sam_account, unistr2_static(&(info3->uni_logon_script)), PDB_CHANGED)) {
 962                 pdb_free_sam(&sam_account);
 963                 return NT_STATUS_NO_MEMORY;
 964         }
 965
 966         if (!pdb_set_profile_path(sam_account, unistr2_static(&(info3->uni_profile_path)), PDB_CHANGED)) {
 967                 pdb_free_sam(&sam_account);
 968                 return NT_STATUS_NO_MEMORY;
 969         }
 970
 971         if (!pdb_set_homedir(sam_account, unistr2_static(&(info3->uni_home_dir)), PDB_CHANGED)) {
 972                 pdb_free_sam(&sam_account);
 973                 return NT_STATUS_NO_MEMORY;
 974         }
 975
 976         if (!pdb_set_dir_drive(sam_account, unistr2_static(&(info3->uni_dir_drive)), PDB_CHANGED)) {
 977                 pdb_free_sam(&sam_account);
 978                 return NT_STATUS_NO_MEMORY;
 979         }
 980
 981         if (!NT_STATUS_IS_OK(nt_status = make_server_info(server_info, sam_account))) {
 982                 DEBUG(4, ("make_server_info failed!\n"));
 983                 pdb_free_sam(&sam_account);
 984                 return nt_status;
 985         }
 986
 987         /* Store the user group information in the server_info
 988            returned to the caller. */
 989
 990         if (!NT_STATUS_IS_OK(nt_status
 991                              = get_user_groups_from_local_sam(&user_sid,
 992                                                               &n_lgroupSIDs,
 993                                                               &lgroupSIDs,
 994                                                               &unix_groups)))
 995         {
 996                 DEBUG(4,("get_user_groups_from_local_sam failed\n"));
 997                 return nt_status;
 998         }
 999
1000         (*server_info)->groups = unix_groups;
1001         (*server_info)->n_groups = n_lgroupSIDs;
1002
1003         /* Create a 'combined' list of all SIDs we might want in the SD */
1004         all_group_SIDs   = malloc(sizeof(DOM_SID) *
1005                                   (n_lgroupSIDs + info3->num_groups2 +
1006                                    info3->num_other_sids));
1007         if (!all_group_SIDs) {
1008                 DEBUG(0, ("create_nt_token_info3: malloc() failed for DOM_SID list!\n"));
1009                 SAFE_FREE(lgroupSIDs);
1010                 return NT_STATUS_NO_MEMORY;
1011         }
1012
1013         /* Copy the 'local' sids */
1014         memcpy(all_group_SIDs, lgroupSIDs, sizeof(DOM_SID) * n_lgroupSIDs);
1015         SAFE_FREE(lgroupSIDs);
1016
1017         /* and create (by appending rids) the 'domain' sids */
1018         for (i = 0; i < info3->num_groups2; i++) {
1019                 sid_copy(&all_group_SIDs[i+n_lgroupSIDs], &(info3->dom_sid.sid));
1020                 if (!sid_append_rid(&all_group_SIDs[i+n_lgroupSIDs], info3->gids[i].g_rid)) {
1021                         nt_status = NT_STATUS_INVALID_PARAMETER;
1022                         DEBUG(3,("create_nt_token_info3: could not append additional group rid 0x%x\n",
1023                                 info3->gids[i].g_rid));
1024                         SAFE_FREE(lgroupSIDs);
1025                         return nt_status;
1026                 }
1027         }
1028
1029         /* Copy 'other' sids.  We need to do sid filtering here to
1030            prevent possible elevation of privileges.  See:
1031
1032            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
1033          */
1034
1035         for (i = 0; i < info3->num_other_sids; i++)
1036                 sid_copy(&all_group_SIDs[
1037                                  n_lgroupSIDs + info3->num_groups2 + i],
1038                          &info3->other_sids[i].sid);
1039
1040         /* Where are the 'global' sids... */
1041
1042         /* can the user be guest? if yes, where is it stored? */
1043         if (!NT_STATUS_IS_OK(
1044                     nt_status = create_nt_user_token(
1045                             &user_sid, &group_sid,
1046                             n_lgroupSIDs + info3->num_groups2 + info3->num_other_sids,
1047                             all_group_SIDs, False, &token))) {
1048                 DEBUG(4,("create_nt_user_token failed\n"));
1049                 SAFE_FREE(all_group_SIDs);
1050                 return nt_status;
1051         }
1052
1053         (*server_info)->ptok = token;
1054
1055         SAFE_FREE(all_group_SIDs);
1056
1057         return NT_STATUS_OK;
1058 }
1059
1060 /***************************************************************************
1061  Free a user_info struct
1062 ***************************************************************************/
1063
1064 void free_user_info(auth_usersupplied_info **user_info)
1065 {
1066         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
1067         if (*user_info != NULL) {
1068                 if ((*user_info)->smb_name.str) {
1069                         DEBUG(10,("structure was created for %s\n", (*user_info)->smb_name.str));
1070                 }
1071                 SAFE_FREE((*user_info)->smb_name.str);
1072                 SAFE_FREE((*user_info)->internal_username.str);
1073                 SAFE_FREE((*user_info)->client_domain.str);
1074                 SAFE_FREE((*user_info)->domain.str);
1075                 SAFE_FREE((*user_info)->wksta_name.str);
1076                 data_blob_free(&(*user_info)->lm_resp);
1077                 data_blob_free(&(*user_info)->nt_resp);
1078                 SAFE_FREE((*user_info)->interactive_password);
1079                 data_blob_clear_free(&(*user_info)->plaintext_password);
1080                 ZERO_STRUCT(**user_info);
1081         }
1082         SAFE_FREE(*user_info);
1083 }
1084
1085 /***************************************************************************
1086  Clear out a server_info struct that has been allocated
1087 ***************************************************************************/
1088
1089 void free_server_info(auth_serversupplied_info **server_info)
1090 {
1091         DEBUG(5,("attempting to free (and zero) a server_info structure\n"));
1092         if (*server_info != NULL) {
1093                 pdb_free_sam(&(*server_info)->sam_account);
1094
1095                 /* call pam_end here, unless we know we are keeping it */
1096                 delete_nt_token( &(*server_info)->ptok );
1097                 SAFE_FREE((*server_info)->groups);
1098                 ZERO_STRUCT(**server_info);
1099         }
1100         SAFE_FREE(*server_info);
1101 }
1102
1103 /***************************************************************************
1104  Make an auth_methods struct
1105 ***************************************************************************/
1106
1107 BOOL make_auth_methods(struct auth_context *auth_context, auth_methods **auth_method)
1108 {
1109         if (!auth_context) {
1110                 smb_panic("no auth_context supplied to make_auth_methods()!\n");
1111         }
1112
1113         if (!auth_method) {
1114                 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
1115         }
1116
1117         *auth_method = talloc(auth_context->mem_ctx, sizeof(**auth_method));
1118         if (!*auth_method) {
1119                 DEBUG(0,("make_auth_method: malloc failed!\n"));
1120                 return False;
1121         }
1122         ZERO_STRUCTP(*auth_method);
1123
1124         return True;
1125 }
1126
1127 /****************************************************************************
1128  Delete a SID token.
1129 ****************************************************************************/
1130
1131 void delete_nt_token(NT_USER_TOKEN **pptoken)
1132 {
1133     if (*pptoken) {
1134             NT_USER_TOKEN *ptoken = *pptoken;
1135             SAFE_FREE( ptoken->user_sids );
1136             ZERO_STRUCTP(ptoken);
1137     }
1138     SAFE_FREE(*pptoken);
1139 }
1140
1141 /****************************************************************************
1142  Duplicate a SID token.
1143 ****************************************************************************/
1144
1145 NT_USER_TOKEN *dup_nt_token(NT_USER_TOKEN *ptoken)
1146 {
1147         NT_USER_TOKEN *token;
1148
1149         if (!ptoken)
1150                 return NULL;
1151
1152     if ((token = (NT_USER_TOKEN *)malloc( sizeof(NT_USER_TOKEN) ) ) == NULL)
1153         return NULL;
1154
1155     ZERO_STRUCTP(token);
1156
1157     if ((token->user_sids = (DOM_SID *)memdup( ptoken->user_sids, sizeof(DOM_SID) * ptoken->num_sids )) == NULL) {
1158         SAFE_FREE(token);
1159         return NULL;
1160     }
1161
1162     token->num_sids = ptoken->num_sids;
1163
1164         return token;
1165 }
1166
1167 /**
1168  * Squash an NT_STATUS in line with security requirements.
1169  * In an attempt to avoid giving the whole game away when users
1170  * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
1171  * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
1172  * (session setups in particular).
1173  *
1174  * @param nt_status NTSTATUS input for squashing.
1175  * @return the 'squashed' nt_status
1176  **/
1177
1178 NTSTATUS nt_status_squash(NTSTATUS nt_status)
1179 {
1180         if NT_STATUS_IS_OK(nt_status) {
1181                 return nt_status;
1182         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
1183                 /* Match WinXP and don't give the game away */
1184                 return NT_STATUS_LOGON_FAILURE;
1185
1186         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
1187                 /* Match WinXP and don't give the game away */
1188                 return NT_STATUS_LOGON_FAILURE;
1189         } else {
1190                 return nt_status;
1191         }
1192 }
1193
1194
1195