source4/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 #include "librpc/gen_ndr/ndr_samr.h"
  26 #include "librpc/gen_ndr/ndr_netlogon.h"
  27 #include "librpc/gen_ndr/ndr_security.h"
  28 #include "auth/auth.h"
  29
  30 #undef DBGC_CLASS
  31 #define DBGC_CLASS DBGC_AUTH
  32
  33 /****************************************************************************
  34  Create an auth_usersupplied_data structure
  35 ****************************************************************************/
  36 static NTSTATUS make_user_info(TALLOC_CTX *mem_ctx,
  37                                struct auth_usersupplied_info **user_info,
  38                                const char *smb_name,
  39                                const char *internal_username,
  40                                const char *client_domain,
  41                                const char *domain,
  42                                const char *wksta_name,
  43                                DATA_BLOB *lm_password, DATA_BLOB *nt_password,
  44                                DATA_BLOB *lm_interactive_password, DATA_BLOB *nt_interactive_password,
  45                                DATA_BLOB *plaintext,
  46                                BOOL encrypted)
  47 {
  48
  49         DEBUG(5,("attempting to make a user_info for %s (%s)\n", internal_username, smb_name));
  50
  51         *user_info = talloc_p(mem_ctx, struct auth_usersupplied_info);
  52         if (!user_info) {
  53                 return NT_STATUS_NO_MEMORY;
  54         }
  55
  56         ZERO_STRUCTP(*user_info);
  57
  58         DEBUG(5,("making strings for %s's user_info struct\n", internal_username));
  59
  60         (*user_info)->smb_name.str = talloc_strdup(*user_info, smb_name);
  61         if ((*user_info)->smb_name.str) {
  62                 (*user_info)->smb_name.len = strlen(smb_name);
  63         } else {
  64                 free_user_info(user_info);
  65                 return NT_STATUS_NO_MEMORY;
  66         }
  67
  68         (*user_info)->internal_username.str = talloc_strdup(*user_info, internal_username);
  69         if ((*user_info)->internal_username.str) {
  70                 (*user_info)->internal_username.len = strlen(internal_username);
  71         } else {
  72                 free_user_info(user_info);
  73                 return NT_STATUS_NO_MEMORY;
  74         }
  75
  76         (*user_info)->domain.str = talloc_strdup(*user_info, domain);
  77         if ((*user_info)->domain.str) {
  78                 (*user_info)->domain.len = strlen(domain);
  79         } else {
  80                 free_user_info(user_info);
  81                 return NT_STATUS_NO_MEMORY;
  82         }
  83
  84         (*user_info)->client_domain.str = talloc_strdup(*user_info, client_domain);
  85         if ((*user_info)->client_domain.str) {
  86                 (*user_info)->client_domain.len = strlen(client_domain);
  87         } else {
  88                 free_user_info(user_info);
  89                 return NT_STATUS_NO_MEMORY;
  90         }
  91
  92         (*user_info)->wksta_name.str = talloc_strdup(*user_info, wksta_name);
  93         if ((*user_info)->wksta_name.str) {
  94                 (*user_info)->wksta_name.len = strlen(wksta_name);
  95         } else {
  96                 free_user_info(user_info);
  97                 return NT_STATUS_NO_MEMORY;
  98         }
  99
 100         DEBUG(5,("making blobs for %s's user_info struct\n", internal_username));
 101
 102         if (lm_password)
 103                 (*user_info)->lm_resp = data_blob_talloc(*user_info,
 104                                                          lm_password->data,
 105                                                          lm_password->length);
 106         if (nt_password)
 107                 (*user_info)->nt_resp = data_blob_talloc(*user_info,
 108                                                          nt_password->data,
 109                                                          nt_password->length);
 110         if (lm_interactive_password)
 111                 (*user_info)->lm_interactive_password =
 112                         data_blob_talloc(*user_info,
 113                                          lm_interactive_password->data,
 114                                          lm_interactive_password->length);
 115         if (nt_interactive_password)
 116                 (*user_info)->nt_interactive_password =
 117                         data_blob_talloc(*user_info,
 118                                          nt_interactive_password->data,
 119                                          nt_interactive_password->length);
 120
 121         if (plaintext)
 122                 (*user_info)->plaintext_password =
 123                         data_blob_talloc(*user_info,
 124                                          plaintext->data,
 125                                          plaintext->length);
 126
 127         (*user_info)->encrypted = encrypted;
 128
 129         DEBUG(10,("made an %sencrypted user_info for %s (%s)\n", encrypted ? "":"un" , internal_username, smb_name));
 130
 131         return NT_STATUS_OK;
 132 }
 133
 134 /****************************************************************************
 135  Create an auth_usersupplied_data structure after appropriate mapping.
 136 ****************************************************************************/
 137
 138 NTSTATUS make_user_info_map(TALLOC_CTX *mem_ctx,
 139                             struct auth_usersupplied_info **user_info,
 140                             const char *smb_name,
 141                             const char *client_domain,
 142                             const char *wksta_name,
 143                             DATA_BLOB *lm_password, DATA_BLOB *nt_password,
 144                             DATA_BLOB *lm_interactive_password, DATA_BLOB *nt_interactive_password,
 145                             DATA_BLOB *plaintext,
 146                             BOOL encrypted)
 147 {
 148         const char *domain;
 149
 150         DEBUG(5, ("make_user_info_map: Mapping user [%s]\\[%s] from workstation [%s]\n",
 151               client_domain, smb_name, wksta_name));
 152
 153         /* don't allow "" as a domain, fixes a Win9X bug
 154            where it doens't supply a domain for logon script
 155            'net use' commands.                                 */
 156
 157         if ( *client_domain )
 158                 domain = client_domain;
 159         else
 160                 domain = lp_workgroup();
 161
 162         /* we know that it is a trusted domain (and we are allowing
 163            them) or it is our domain */
 164
 165         return make_user_info(mem_ctx,
 166                               user_info, smb_name, smb_name,
 167                               client_domain, domain, wksta_name,
 168                               lm_password, nt_password,
 169                               lm_interactive_password, nt_interactive_password,
 170                               plaintext, encrypted);
 171 }
 172
 173 /****************************************************************************
 174  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 175  Decrypt and encrypt the passwords.
 176 ****************************************************************************/
 177
 178 NTSTATUS make_user_info_netlogon_network(TALLOC_CTX *mem_ctx,
 179                                          struct auth_usersupplied_info **user_info,
 180                                          const char *smb_name,
 181                                          const char *client_domain,
 182                                          const char *wksta_name,
 183                                          const uint8_t *lm_network_password, int lm_password_len,
 184                                          const uint8_t *nt_network_password, int nt_password_len)
 185 {
 186         NTSTATUS nt_status;
 187         DATA_BLOB lm_blob = data_blob(lm_network_password, lm_password_len);
 188         DATA_BLOB nt_blob = data_blob(nt_network_password, nt_password_len);
 189
 190         nt_status = make_user_info_map(mem_ctx,
 191                                        user_info,
 192                                        smb_name, client_domain,
 193                                        wksta_name,
 194                                        lm_password_len ? &lm_blob : NULL,
 195                                        nt_password_len ? &nt_blob : NULL,
 196                                        NULL, NULL, NULL,
 197                                        True);
 198
 199         data_blob_free(&lm_blob);
 200         data_blob_free(&nt_blob);
 201         return nt_status;
 202 }
 203
 204 /****************************************************************************
 205  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 206  Decrypt and encrypt the passwords.
 207 ****************************************************************************/
 208
 209 NTSTATUS make_user_info_netlogon_interactive(TALLOC_CTX *mem_ctx,
 210                                              struct auth_usersupplied_info **user_info,
 211                                              const char *smb_name,
 212                                              const char *client_domain,
 213                                              const char *wksta_name,
 214                                              const uint8_t chal[8],
 215                                              const struct samr_Password *lm_interactive_password,
 216                                              const struct samr_Password *nt_interactive_password)
 217 {
 218         NTSTATUS nt_status;
 219         DATA_BLOB local_lm_blob;
 220         DATA_BLOB local_nt_blob;
 221
 222         DATA_BLOB lm_interactive_blob;
 223         DATA_BLOB nt_interactive_blob;
 224         uint8_t local_lm_response[24];
 225         uint8_t local_nt_response[24];
 226
 227         SMBOWFencrypt(lm_interactive_password->hash, chal, local_lm_response);
 228         SMBOWFencrypt(nt_interactive_password->hash, chal, local_nt_response);
 229
 230         local_lm_blob = data_blob(local_lm_response,
 231                                   sizeof(local_lm_response));
 232         lm_interactive_blob = data_blob(lm_interactive_password->hash,
 233                                         sizeof(lm_interactive_password->hash));
 234
 235         local_nt_blob = data_blob(local_nt_response,
 236                                   sizeof(local_nt_response));
 237         nt_interactive_blob = data_blob(nt_interactive_password->hash,
 238                                         sizeof(nt_interactive_password->hash));
 239
 240         nt_status = make_user_info_map(mem_ctx,
 241                                        user_info,
 242                                        smb_name, client_domain,
 243                                        wksta_name,
 244                                        &local_lm_blob,
 245                                        &local_nt_blob,
 246                                        &lm_interactive_blob,
 247                                        &nt_interactive_blob,
 248                                        NULL,
 249                                        True);
 250
 251         data_blob_free(&local_lm_blob);
 252         data_blob_free(&local_nt_blob);
 253         data_blob_free(&lm_interactive_blob);
 254         data_blob_free(&nt_interactive_blob);
 255         return nt_status;
 256 }
 257 /****************************************************************************
 258  Create an auth_usersupplied_data structure
 259 ****************************************************************************/
 260
 261 NTSTATUS make_user_info_for_reply_enc(TALLOC_CTX *mem_ctx,
 262                                       struct auth_usersupplied_info **user_info,
 263                                       const char *smb_name,
 264                                       const char *client_domain,
 265                                       const char *remote_machine,
 266                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 267 {
 268         return make_user_info_map(mem_ctx,
 269                                   user_info, smb_name,
 270                                   client_domain,
 271                                   remote_machine,
 272                                   lm_resp.data ? &lm_resp : NULL,
 273                                   nt_resp.data ? &nt_resp : NULL,
 274                                   NULL, NULL, NULL,
 275                                   True);
 276 }
 277
 278 /****************************************************************************
 279  Create a guest user_info blob, for anonymous authenticaion.
 280 ****************************************************************************/
 281
 282 BOOL make_user_info_guest(TALLOC_CTX *mem_ctx,
 283                           struct auth_usersupplied_info **user_info)
 284 {
 285         NTSTATUS nt_status;
 286
 287         nt_status = make_user_info(mem_ctx,
 288                                    user_info,
 289                                    "","",
 290                                    "","",
 291                                    "",
 292                                    NULL, NULL,
 293                                    NULL, NULL,
 294                                    NULL,
 295                                    True);
 296
 297         return NT_STATUS_IS_OK(nt_status) ? True : False;
 298 }
 299
 300 /****************************************************************************
 301  prints a struct security_token to debug output.
 302 ****************************************************************************/
 303 void debug_security_token(int dbg_class, int dbg_lev, const struct security_token *token)
 304 {
 305         TALLOC_CTX *mem_ctx;
 306
 307         size_t     i;
 308
 309         if (!token) {
 310                 DEBUGC(dbg_class, dbg_lev, ("Security token: (NULL)\n"));
 311                 return;
 312         }
 313
 314         mem_ctx = talloc_init("debug_security_token()");
 315         if (!mem_ctx) {
 316                 return;
 317         }
 318
 319         DEBUGC(dbg_class, dbg_lev, ("Security token of user %s\n",
 320                                     dom_sid_string(mem_ctx, token->user_sid) ));
 321         DEBUGADDC(dbg_class, dbg_lev, ("contains %lu SIDs\n",
 322                                        (unsigned long)token->num_sids));
 323         for (i = 0; i < token->num_sids; i++) {
 324                 DEBUGADDC(dbg_class, dbg_lev,
 325                           ("SID[%3lu]: %s\n", (unsigned long)i,
 326                            dom_sid_string(mem_ctx, token->sids[i])));
 327         }
 328
 329         talloc_destroy(mem_ctx);
 330 }
 331
 332 /****************************************************************************
 333  prints a struct auth_session_info security token to debug output.
 334 ****************************************************************************/
 335 void debug_session_info(int dbg_class, int dbg_lev,
 336                         const struct auth_session_info *session_info)
 337 {
 338         if (!session_info) {
 339                 DEBUGC(dbg_class, dbg_lev, ("Session Info: (NULL)\n"));
 340                 return;
 341         }
 342
 343         debug_security_token(dbg_class, dbg_lev, session_info->security_token);
 344 }
 345
 346 /****************************************************************************
 347  Create the SID list for this user.
 348 ****************************************************************************/
 349 NTSTATUS create_security_token(TALLOC_CTX *mem_ctx,
 350                                struct dom_sid *user_sid, struct dom_sid *group_sid,
 351                                int n_groupSIDs, struct dom_sid **groupSIDs,
 352                                BOOL is_guest, struct security_token **token)
 353 {
 354         struct security_token *ptoken;
 355         int i;
 356         NTSTATUS status;
 357
 358         ptoken = security_token_initialise(mem_ctx);
 359         if (ptoken == NULL) {
 360                 return NT_STATUS_NO_MEMORY;
 361         }
 362
 363         ptoken->sids = talloc_array_p(ptoken, struct dom_sid *, n_groupSIDs + 5);
 364         if (!ptoken->sids) {
 365                 return NT_STATUS_NO_MEMORY;
 366         }
 367
 368         ptoken->user_sid = user_sid;
 369         ptoken->group_sid = group_sid;
 370         ptoken->privilege_mask = 0;
 371
 372         ptoken->sids[0] = user_sid;
 373         ptoken->sids[1] = group_sid;
 374
 375         /*
 376          * Finally add the "standard" SIDs.
 377          * The only difference between guest and "anonymous" (which we
 378          * don't really support) is the addition of Authenticated_Users.
 379          */
 380         ptoken->sids[2] = dom_sid_parse_talloc(mem_ctx, SID_WORLD);
 381         ptoken->sids[3] = dom_sid_parse_talloc(mem_ctx, SID_NT_NETWORK);
 382         ptoken->sids[4] = dom_sid_parse_talloc(mem_ctx,
 383                                                is_guest?SID_BUILTIN_GUESTS:
 384                                                SID_NT_AUTHENTICATED_USERS);
 385         ptoken->num_sids = 5;
 386
 387         for (i = 0; i < n_groupSIDs; i++) {
 388                 size_t check_sid_idx;
 389                 for (check_sid_idx = 1;
 390                      check_sid_idx < ptoken->num_sids;
 391                      check_sid_idx++) {
 392                         if (dom_sid_equal(ptoken->sids[check_sid_idx], groupSIDs[i])) {
 393                                 break;
 394                         }
 395                 }
 396
 397                 if (check_sid_idx == ptoken->num_sids) {
 398                         ptoken->sids[ptoken->num_sids++] = groupSIDs[i];
 399                 }
 400         }
 401
 402         /* setup the privilege mask for this token */
 403         status = samdb_privilege_setup(ptoken);
 404         if (!NT_STATUS_IS_OK(status)) {
 405                 talloc_free(ptoken);
 406                 return status;
 407         }
 408
 409         debug_security_token(DBGC_AUTH, 10, ptoken);
 410
 411         *token = ptoken;
 412
 413         return NT_STATUS_OK;
 414 }
 415
 416 /***************************************************************************
 417  Make a user_info struct
 418 ***************************************************************************/
 419
 420 NTSTATUS make_server_info(const TALLOC_CTX *mem_ctx,
 421                           struct auth_serversupplied_info **server_info,
 422                           const char *username)
 423 {
 424         *server_info = talloc_p(mem_ctx, struct auth_serversupplied_info);
 425         if (!*server_info) {
 426                 return NT_STATUS_NO_MEMORY;
 427         }
 428         ZERO_STRUCTP(*server_info);
 429
 430         return NT_STATUS_OK;
 431 }
 432
 433 /***************************************************************************
 434  Make a server_info struct from the info3 returned by a domain logon
 435 ***************************************************************************/
 436
 437 NTSTATUS make_server_info_netlogon_validation(TALLOC_CTX *mem_ctx,
 438                                               const char *internal_username,
 439                                               struct auth_serversupplied_info **server_info,
 440                                               uint16 validation_level,
 441                                               union netr_Validation *validation)
 442 {
 443         NTSTATUS nt_status;
 444         struct netr_SamBaseInfo *base = NULL;
 445         switch (validation_level) {
 446         case 2:
 447                 if (!validation || !validation->sam2) {
 448                         return NT_STATUS_INVALID_PARAMETER;
 449                 }
 450                 base = &validation->sam2->base;
 451                 break;
 452         case 3:
 453                 if (!validation || !validation->sam3) {
 454                         return NT_STATUS_INVALID_PARAMETER;
 455                 }
 456                 base = &validation->sam3->base;
 457                 break;
 458         case 6:
 459                 if (!validation || !validation->sam6) {
 460                         return NT_STATUS_INVALID_PARAMETER;
 461                 }
 462                 base = &validation->sam6->base;
 463                 break;
 464         default:
 465                 return NT_STATUS_INVALID_LEVEL;
 466         }
 467
 468         nt_status = make_server_info(mem_ctx, server_info, internal_username);
 469
 470         if (!NT_STATUS_IS_OK(nt_status)) {
 471                 return nt_status;
 472         }
 473
 474         (*server_info)->guest = False;
 475
 476         /*
 477            Here is where we should check the list of
 478            trusted domains, and verify that the SID
 479            matches.
 480         */
 481
 482         (*server_info)->user_sid = dom_sid_add_rid(*server_info, dom_sid_dup(*server_info, base->domain_sid), base->rid);
 483         (*server_info)->primary_group_sid = dom_sid_add_rid(*server_info, dom_sid_dup(*server_info, base->domain_sid), base->primary_gid);
 484
 485         (*server_info)->domain_groups = talloc_array_p((*server_info), struct dom_sid*, base->group_count);
 486         if (!(*server_info)->domain_groups) {
 487                 return NT_STATUS_NO_MEMORY;
 488         }
 489
 490         for ((*server_info)->n_domain_groups = 0;
 491              (*server_info)->n_domain_groups < base->group_count;
 492              (*server_info)->n_domain_groups++) {
 493                 struct dom_sid *sid;
 494                 sid = dom_sid_dup((*server_info)->domain_groups, base->domain_sid);
 495                 if (!sid) {
 496                         return NT_STATUS_NO_MEMORY;
 497                 }
 498                 (*server_info)->domain_groups[(*server_info)->n_domain_groups]
 499                         = dom_sid_add_rid(*server_info, sid,
 500                                           base->groupids[(*server_info)->n_domain_groups].rid);
 501                 if (!(*server_info)->domain_groups[(*server_info)->n_domain_groups]) {
 502                         return NT_STATUS_NO_MEMORY;
 503                 }
 504         }
 505
 506         /* Copy 'other' sids.  We need to do sid filtering here to
 507            prevent possible elevation of privileges.  See:
 508
 509            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 510          */
 511
 512         if (validation_level == 3) {
 513                 int i;
 514                 (*server_info)->domain_groups
 515                         = talloc_realloc_p((*server_info),
 516                                            (*server_info)->domain_groups,
 517                                            struct dom_sid*,
 518                                            base->group_count + validation->sam3->sidcount);
 519
 520                 if (!(*server_info)->domain_groups) {
 521                         return NT_STATUS_NO_MEMORY;
 522                 }
 523
 524                 for (i = 0; i < validation->sam3->sidcount; i++) {
 525                         (*server_info)->domain_groups[(*server_info)->n_domain_groups + i] =
 526                                 dom_sid_dup((*server_info)->domain_groups,
 527                                             validation->sam3->sids[i].sid);
 528                 }
 529
 530                 /* Where are the 'global' sids?... */
 531         }
 532
 533         if (base->account_name.string) {
 534                 (*server_info)->account_name = talloc_reference(*server_info, base->account_name.string);
 535         } else {
 536                 (*server_info)->account_name = talloc_strdup(*server_info, internal_username);
 537         }
 538
 539         (*server_info)->domain = talloc_reference(*server_info, base->domain.string);
 540         (*server_info)->full_name = talloc_reference(*server_info, base->full_name.string);
 541         (*server_info)->logon_script = talloc_reference(*server_info, base->logon_script.string);
 542         (*server_info)->profile_path = talloc_reference(*server_info, base->profile_path.string);
 543         (*server_info)->home_directory = talloc_reference(*server_info, base->home_directory.string);
 544         (*server_info)->home_drive = talloc_reference(*server_info, base->home_drive.string);
 545         (*server_info)->last_logon = base->last_logon;
 546         (*server_info)->last_logoff = base->last_logoff;
 547         (*server_info)->acct_expiry = base->acct_expiry;
 548         (*server_info)->last_password_change = base->last_password_change;
 549         (*server_info)->allow_password_change = base->allow_password_change;
 550         (*server_info)->force_password_change = base->force_password_change;
 551
 552         (*server_info)->logon_count = base->logon_count;
 553         (*server_info)->bad_password_count = base->bad_password_count;
 554
 555         (*server_info)->acct_flags = base->acct_flags;
 556
 557         /* ensure we are never given NULL session keys */
 558
 559         if (all_zero(base->key.key, sizeof(base->key.key))) {
 560                 (*server_info)->user_session_key = data_blob(NULL, 0);
 561         } else {
 562                 (*server_info)->user_session_key = data_blob_talloc((*server_info), base->key.key, sizeof(base->key.key));
 563         }
 564
 565         if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
 566                 (*server_info)->lm_session_key = data_blob(NULL, 0);
 567         } else {
 568                 (*server_info)->lm_session_key = data_blob_talloc((*server_info), base->LMSessKey.key, sizeof(base->LMSessKey.key));
 569         }
 570         return NT_STATUS_OK;
 571 }
 572
 573 /***************************************************************************
 574  Free a user_info struct
 575 ***************************************************************************/
 576
 577 void free_user_info(struct auth_usersupplied_info **user_info)
 578 {
 579         DEBUG(5,("attempting to free (and zero) a user_info structure\n"));
 580         if (*user_info) {
 581                 data_blob_clear(&(*user_info)->plaintext_password);
 582         }
 583
 584         talloc_free(*user_info);
 585         *user_info = NULL;
 586 }
 587
 588 /***************************************************************************
 589  Clear out a server_info struct that has been allocated
 590 ***************************************************************************/
 591
 592 void free_server_info(struct auth_serversupplied_info **server_info)
 593 {
 594         DEBUG(5,("attempting to free a server_info structure\n"));
 595         talloc_free(*server_info);
 596         *server_info = NULL;
 597 }
 598
 599 /***************************************************************************
 600  Make an auth_methods struct
 601 ***************************************************************************/
 602
 603 BOOL make_auth_methods(struct auth_context *auth_context, struct auth_methods **auth_method)
 604 {
 605         if (!auth_context) {
 606                 smb_panic("no auth_context supplied to make_auth_methods()!\n");
 607         }
 608
 609         if (!auth_method) {
 610                 smb_panic("make_auth_methods: pointer to auth_method pointer is NULL!\n");
 611         }
 612
 613         *auth_method = talloc_p(auth_context, struct auth_methods);
 614         if (!*auth_method) {
 615                 return False;
 616         }
 617         ZERO_STRUCTP(*auth_method);
 618
 619         return True;
 620 }
 621
 622 NTSTATUS make_session_info(TALLOC_CTX *mem_ctx,
 623                            struct auth_serversupplied_info *server_info,
 624                            struct auth_session_info **session_info)
 625 {
 626         NTSTATUS nt_status;
 627
 628         *session_info = talloc_p(mem_ctx, struct auth_session_info);
 629         if (!*session_info) {
 630                 return NT_STATUS_NO_MEMORY;
 631         }
 632
 633         (*session_info)->server_info = server_info;
 634         talloc_reference(*session_info, (*session_info)->server_info);
 635
 636         /* unless set otherwise, the session key is the user session
 637          * key from the auth subsystem */
 638
 639         (*session_info)->session_key = server_info->user_session_key;
 640
 641         /* we should search for local groups here */
 642
 643         nt_status = create_security_token((*session_info),
 644                                           server_info->user_sid,
 645                                           server_info->primary_group_sid,
 646                                           server_info->n_domain_groups,
 647                                           server_info->domain_groups,
 648                                           False,
 649                                           &(*session_info)->security_token);
 650
 651         return nt_status;
 652 }
 653
 654 /***************************************************************************
 655  Clear out a server_info struct that has been allocated
 656 ***************************************************************************/
 657
 658 void free_session_info(struct auth_session_info **session_info)
 659 {
 660         DEBUG(5,("attempting to free a session_info structure\n"));
 661         talloc_free((*session_info));
 662         *session_info = NULL;
 663 }
 664
 665 /**
 666  * Squash an NT_STATUS in line with security requirements.
 667  * In an attempt to avoid giving the whole game away when users
 668  * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
 669  * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
 670  * (session setups in particular).
 671  *
 672  * @param nt_status NTSTATUS input for squashing.
 673  * @return the 'squashed' nt_status
 674  **/
 675
 676 NTSTATUS nt_status_squash(NTSTATUS nt_status)
 677 {
 678         if NT_STATUS_IS_OK(nt_status) {
 679                 return nt_status;
 680         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
 681                 /* Match WinXP and don't give the game away */
 682                 return NT_STATUS_LOGON_FAILURE;
 683
 684         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
 685                 /* Match WinXP and don't give the game away */
 686                 return NT_STATUS_LOGON_FAILURE;
 687         } else {
 688                 return nt_status;
 689         }
 690 }
 691
 692
 693