source/auth/auth_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Authentication utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Andrew Bartlett 2001
   6    Copyright (C) Jeremy Allison 2000-2001
   7    Copyright (C) Rafal Szczesniak 2002
   8    Copyright (C) Stefan Metzmacher 2005
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26 #include "auth/auth.h"
  27 #include "libcli/security/proto.h"
  28 #include "libcli/auth/libcli_auth.h"
  29
  30 /* this default function can be used by mostly all backends
  31  * which don't want to set a challlenge
  32  */
  33 NTSTATUS auth_get_challenge_not_implemented(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx, DATA_BLOB *challenge)
  34 {
  35         /* we don't want to set a challenge */
  36         return NT_STATUS_NOT_IMPLEMENTED;
  37 }
  38
  39 /****************************************************************************
  40  Create an auth_usersupplied_data structure after appropriate mapping.
  41 ****************************************************************************/
  42
  43 NTSTATUS map_user_info(TALLOC_CTX *mem_ctx,
  44                        const struct auth_usersupplied_info *user_info,
  45                        struct auth_usersupplied_info **user_info_mapped)
  46 {
  47         const char *domain;
  48         char *account_name;
  49         char *d;
  50         DEBUG(5,("map_user_info: Mapping user [%s]\\[%s] from workstation [%s]\n",
  51                 user_info->client.domain_name, user_info->client.account_name, user_info->workstation_name));
  52
  53         account_name = talloc_strdup(mem_ctx, user_info->client.account_name);
  54         if (!account_name) {
  55                 return NT_STATUS_NO_MEMORY;
  56         }
  57
  58         /* don't allow "" as a domain, fixes a Win9X bug
  59            where it doens't supply a domain for logon script
  60            'net use' commands.                                 */
  61
  62         /* Split user@realm names into user and realm components.  This is TODO to fix with proper userprincipalname support */
  63         if (user_info->client.domain_name && *user_info->client.domain_name) {
  64                 domain = user_info->client.domain_name;
  65         } else if (strchr_m(user_info->client.account_name, '@')) {
  66                 d = strchr_m(account_name, '@');
  67                 if (!d) {
  68                         return NT_STATUS_INTERNAL_ERROR;
  69                 }
  70                 d[0] = '\0';
  71                 d++;
  72                 domain = d;
  73         } else {
  74                 domain = lp_workgroup();
  75         }
  76
  77         *user_info_mapped = talloc(mem_ctx, struct auth_usersupplied_info);
  78         if (!*user_info_mapped) {
  79                 return NT_STATUS_NO_MEMORY;
  80         }
  81         talloc_reference(*user_info_mapped, user_info);
  82         **user_info_mapped = *user_info;
  83         (*user_info_mapped)->mapped_state = True;
  84         (*user_info_mapped)->mapped.domain_name = talloc_strdup(*user_info_mapped, domain);
  85         (*user_info_mapped)->mapped.account_name = talloc_strdup(*user_info_mapped, account_name);
  86         talloc_free(account_name);
  87         if (!(*user_info_mapped)->mapped.domain_name
  88             || !(*user_info_mapped)->mapped.account_name) {
  89                 return NT_STATUS_NO_MEMORY;
  90         }
  91
  92         return NT_STATUS_OK;
  93 }
  94
  95 /****************************************************************************
  96  Create an auth_usersupplied_data structure after appropriate mapping.
  97 ****************************************************************************/
  98
  99  NTSTATUS encrypt_user_info(TALLOC_CTX *mem_ctx, struct auth_context *auth_context,
 100                            enum auth_password_state to_state,
 101                            const struct auth_usersupplied_info *user_info_in,
 102                            const struct auth_usersupplied_info **user_info_encrypted)
 103 {
 104         NTSTATUS nt_status;
 105         struct auth_usersupplied_info *user_info_temp;
 106         switch (to_state) {
 107         case AUTH_PASSWORD_RESPONSE:
 108                 switch (user_info_in->password_state) {
 109                 case AUTH_PASSWORD_PLAIN:
 110                 {
 111                         const struct auth_usersupplied_info *user_info_temp2;
 112                         nt_status = encrypt_user_info(mem_ctx, auth_context,
 113                                                       AUTH_PASSWORD_HASH,
 114                                                       user_info_in, &user_info_temp2);
 115                         if (!NT_STATUS_IS_OK(nt_status)) {
 116                                 return nt_status;
 117                         }
 118                         user_info_in = user_info_temp2;
 119                 }
 120                 case AUTH_PASSWORD_HASH:
 121                 {
 122                         const uint8_t *challenge;
 123                         DATA_BLOB chall_blob;
 124                         user_info_temp = talloc(mem_ctx, struct auth_usersupplied_info);
 125                         if (!user_info_temp) {
 126                                 return NT_STATUS_NO_MEMORY;
 127                         }
 128                         talloc_reference(user_info_temp, user_info_in);
 129                         *user_info_temp = *user_info_in;
 130                         user_info_temp->mapped_state = to_state;
 131
 132                         nt_status = auth_get_challenge(auth_context, &challenge);
 133                         if (!NT_STATUS_IS_OK(nt_status)) {
 134                                 return nt_status;
 135                         }
 136
 137                         chall_blob = data_blob_talloc(mem_ctx, challenge, 8);
 138                         if (lp_client_ntlmv2_auth()) {
 139                                 DATA_BLOB names_blob = NTLMv2_generate_names_blob(mem_ctx, lp_netbios_name(), lp_workgroup());
 140                                 DATA_BLOB lmv2_response, ntlmv2_response, lmv2_session_key, ntlmv2_session_key;
 141
 142                                 if (!SMBNTLMv2encrypt_hash(user_info_temp,
 143                                                            user_info_in->client.account_name,
 144                                                            user_info_in->client.domain_name,
 145                                                            user_info_in->password.hash.nt->hash, &chall_blob,
 146                                                            &names_blob,
 147                                                            &lmv2_response, &ntlmv2_response,
 148                                                            &lmv2_session_key, &ntlmv2_session_key)) {
 149                                         data_blob_free(&names_blob);
 150                                         return NT_STATUS_NO_MEMORY;
 151                                 }
 152                                 data_blob_free(&names_blob);
 153                                 user_info_temp->password.response.lanman = lmv2_response;
 154                                 user_info_temp->password.response.nt = ntlmv2_response;
 155
 156                                 data_blob_free(&lmv2_session_key);
 157                                 data_blob_free(&ntlmv2_session_key);
 158                         } else {
 159                                 DATA_BLOB blob = data_blob_talloc(mem_ctx, NULL, 24);
 160                                 SMBOWFencrypt(user_info_in->password.hash.nt->hash, challenge, blob.data);
 161
 162                                 user_info_temp->password.response.nt = blob;
 163                                 if (lp_client_lanman_auth() && user_info_in->password.hash.lanman) {
 164                                         DATA_BLOB lm_blob = data_blob_talloc(mem_ctx, NULL, 24);
 165                                         SMBOWFencrypt(user_info_in->password.hash.lanman->hash, challenge, blob.data);
 166                                         user_info_temp->password.response.lanman = lm_blob;
 167                                 } else {
 168                                         /* if not sending the LM password, send the NT password twice */
 169                                         user_info_temp->password.response.lanman = user_info_temp->password.response.nt;
 170                                 }
 171                         }
 172
 173                         user_info_in = user_info_temp;
 174                 }
 175                 case AUTH_PASSWORD_RESPONSE:
 176                         *user_info_encrypted = user_info_in;
 177                 }
 178                 break;
 179         case AUTH_PASSWORD_HASH:
 180         {
 181                 switch (user_info_in->password_state) {
 182                 case AUTH_PASSWORD_PLAIN:
 183                 {
 184                         struct samr_Password lanman;
 185                         struct samr_Password nt;
 186
 187                         user_info_temp = talloc(mem_ctx, struct auth_usersupplied_info);
 188                         if (!user_info_temp) {
 189                                 return NT_STATUS_NO_MEMORY;
 190                         }
 191                         talloc_reference(user_info_temp, user_info_in);
 192                         *user_info_temp = *user_info_in;
 193                         user_info_temp->mapped_state = to_state;
 194
 195                         if (E_deshash(user_info_in->password.plaintext, lanman.hash)) {
 196                                 user_info_temp->password.hash.lanman = talloc(user_info_temp,
 197                                                                               struct samr_Password);
 198                                 *user_info_temp->password.hash.lanman = lanman;
 199                         } else {
 200                                 user_info_temp->password.hash.lanman = NULL;
 201                         }
 202
 203                         E_md4hash(user_info_in->password.plaintext, nt.hash);
 204                         user_info_temp->password.hash.nt = talloc(user_info_temp,
 205                                                                    struct samr_Password);
 206                         *user_info_temp->password.hash.nt = nt;
 207
 208                         user_info_in = user_info_temp;
 209                 }
 210                 case AUTH_PASSWORD_HASH:
 211                         *user_info_encrypted = user_info_in;
 212                         break;
 213                 default:
 214                         return NT_STATUS_INVALID_PARAMETER;
 215                         break;
 216                 }
 217                 break;
 218         }
 219         default:
 220                 return NT_STATUS_INVALID_PARAMETER;
 221         }
 222
 223         return NT_STATUS_OK;
 224 }
 225
 226 /***************************************************************************
 227  Make a server_info struct from the info3 returned by a domain logon
 228 ***************************************************************************/
 229 NTSTATUS make_server_info_netlogon_validation(TALLOC_CTX *mem_ctx,
 230                                               const char *account_name,
 231                                               uint16_t validation_level,
 232                                               union netr_Validation *validation,
 233                                               struct auth_serversupplied_info **_server_info)
 234 {
 235         struct auth_serversupplied_info *server_info;
 236         struct netr_SamBaseInfo *base = NULL;
 237         int i;
 238
 239         switch (validation_level) {
 240         case 2:
 241                 if (!validation || !validation->sam2) {
 242                         return NT_STATUS_INVALID_PARAMETER;
 243                 }
 244                 base = &validation->sam2->base;
 245                 break;
 246         case 3:
 247                 if (!validation || !validation->sam3) {
 248                         return NT_STATUS_INVALID_PARAMETER;
 249                 }
 250                 base = &validation->sam3->base;
 251                 break;
 252         case 6:
 253                 if (!validation || !validation->sam6) {
 254                         return NT_STATUS_INVALID_PARAMETER;
 255                 }
 256                 base = &validation->sam6->base;
 257                 break;
 258         default:
 259                 return NT_STATUS_INVALID_LEVEL;
 260         }
 261
 262         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
 263         NT_STATUS_HAVE_NO_MEMORY(server_info);
 264
 265         /*
 266            Here is where we should check the list of
 267            trusted domains, and verify that the SID
 268            matches.
 269         */
 270         server_info->account_sid = dom_sid_add_rid(server_info, base->domain_sid, base->rid);
 271         NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid);
 272
 273
 274         server_info->primary_group_sid = dom_sid_add_rid(server_info, base->domain_sid, base->primary_gid);
 275         NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid);
 276
 277         server_info->n_domain_groups = base->groups.count;
 278         if (base->groups.count) {
 279                 server_info->domain_groups = talloc_array(server_info, struct dom_sid*, base->groups.count);
 280                 NT_STATUS_HAVE_NO_MEMORY(server_info->domain_groups);
 281         } else {
 282                 server_info->domain_groups = NULL;
 283         }
 284
 285         for (i = 0; i < base->groups.count; i++) {
 286                 server_info->domain_groups[i] = dom_sid_add_rid(server_info, base->domain_sid, base->groups.rids[i].rid);
 287                 NT_STATUS_HAVE_NO_MEMORY(server_info->domain_groups[i]);
 288         }
 289
 290         /* Copy 'other' sids.  We need to do sid filtering here to
 291            prevent possible elevation of privileges.  See:
 292
 293            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 294          */
 295
 296         if (validation_level == 3) {
 297                 struct dom_sid **dgrps = server_info->domain_groups;
 298                 size_t sidcount = server_info->n_domain_groups + validation->sam3->sidcount;
 299                 size_t n_dgrps = server_info->n_domain_groups;
 300
 301                 if (validation->sam3->sidcount > 0) {
 302                         dgrps = talloc_realloc(server_info, dgrps, struct dom_sid*, sidcount);
 303                         NT_STATUS_HAVE_NO_MEMORY(dgrps);
 304
 305                         for (i = 0; i < validation->sam3->sidcount; i++) {
 306                                 dgrps[n_dgrps + i] = talloc_reference(dgrps, validation->sam3->sids[i].sid);
 307                         }
 308                 }
 309
 310                 server_info->n_domain_groups = sidcount;
 311                 server_info->domain_groups = dgrps;
 312
 313                 /* Where are the 'global' sids?... */
 314         }
 315
 316         if (base->account_name.string) {
 317                 server_info->account_name = talloc_reference(server_info, base->account_name.string);
 318         } else {
 319                 server_info->account_name = talloc_strdup(server_info, account_name);
 320                 NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
 321         }
 322
 323         server_info->domain_name = talloc_reference(server_info, base->domain.string);
 324         server_info->full_name = talloc_reference(server_info, base->full_name.string);
 325         server_info->logon_script = talloc_reference(server_info, base->logon_script.string);
 326         server_info->profile_path = talloc_reference(server_info, base->profile_path.string);
 327         server_info->home_directory = talloc_reference(server_info, base->home_directory.string);
 328         server_info->home_drive = talloc_reference(server_info, base->home_drive.string);
 329         server_info->logon_server = talloc_reference(server_info, base->logon_server.string);
 330         server_info->last_logon = base->last_logon;
 331         server_info->last_logoff = base->last_logoff;
 332         server_info->acct_expiry = base->acct_expiry;
 333         server_info->last_password_change = base->last_password_change;
 334         server_info->allow_password_change = base->allow_password_change;
 335         server_info->force_password_change = base->force_password_change;
 336         server_info->logon_count = base->logon_count;
 337         server_info->bad_password_count = base->bad_password_count;
 338         server_info->acct_flags = base->acct_flags;
 339
 340         server_info->authenticated = True;
 341
 342         /* ensure we are never given NULL session keys */
 343
 344         if (all_zero(base->key.key, sizeof(base->key.key))) {
 345                 server_info->user_session_key = data_blob(NULL, 0);
 346         } else {
 347                 server_info->user_session_key = data_blob_talloc(server_info, base->key.key, sizeof(base->key.key));
 348                 NT_STATUS_HAVE_NO_MEMORY(server_info->user_session_key.data);
 349         }
 350
 351         if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
 352                 server_info->lm_session_key = data_blob(NULL, 0);
 353         } else {
 354                 server_info->lm_session_key = data_blob_talloc(server_info, base->LMSessKey.key, sizeof(base->LMSessKey.key));
 355                 NT_STATUS_HAVE_NO_MEMORY(server_info->lm_session_key.data);
 356         }
 357
 358         *_server_info = server_info;
 359         return NT_STATUS_OK;
 360 }
 361
 362
 363 NTSTATUS auth_anonymous_server_info(TALLOC_CTX *mem_ctx, struct auth_serversupplied_info **_server_info)
 364 {
 365         struct auth_serversupplied_info *server_info;
 366         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
 367         NT_STATUS_HAVE_NO_MEMORY(server_info);
 368
 369         server_info->account_sid = dom_sid_parse_talloc(server_info, SID_NT_ANONYMOUS);
 370         NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid);
 371
 372         /* is this correct? */
 373         server_info->primary_group_sid = dom_sid_parse_talloc(server_info, SID_BUILTIN_GUESTS);
 374         NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid);
 375
 376         server_info->n_domain_groups = 0;
 377         server_info->domain_groups = NULL;
 378
 379         /* annoying, but the Anonymous really does have a session key,
 380            and it is all zeros! */
 381         server_info->user_session_key = data_blob_talloc(server_info, NULL, 16);
 382         NT_STATUS_HAVE_NO_MEMORY(server_info->user_session_key.data);
 383
 384         server_info->lm_session_key = data_blob_talloc(server_info, NULL, 16);
 385         NT_STATUS_HAVE_NO_MEMORY(server_info->lm_session_key.data);
 386
 387         data_blob_clear(&server_info->user_session_key);
 388         data_blob_clear(&server_info->lm_session_key);
 389
 390         server_info->account_name = talloc_strdup(server_info, "ANONYMOUS LOGON");
 391         NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
 392
 393         server_info->domain_name = talloc_strdup(server_info, "NT AUTHORITY");
 394         NT_STATUS_HAVE_NO_MEMORY(server_info->domain_name);
 395
 396         server_info->full_name = talloc_strdup(server_info, "Anonymous Logon");
 397         NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
 398
 399         server_info->logon_script = talloc_strdup(server_info, "");
 400         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
 401
 402         server_info->profile_path = talloc_strdup(server_info, "");
 403         NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
 404
 405         server_info->home_directory = talloc_strdup(server_info, "");
 406         NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
 407
 408         server_info->home_drive = talloc_strdup(server_info, "");
 409         NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
 410
 411         server_info->logon_server = talloc_strdup(server_info, lp_netbios_name());
 412         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_server);
 413
 414         server_info->last_logon = 0;
 415         server_info->last_logoff = 0;
 416         server_info->acct_expiry = 0;
 417         server_info->last_password_change = 0;
 418         server_info->allow_password_change = 0;
 419         server_info->force_password_change = 0;
 420
 421         server_info->logon_count = 0;
 422         server_info->bad_password_count = 0;
 423
 424         server_info->acct_flags = ACB_NORMAL;
 425
 426         server_info->authenticated = False;
 427
 428         *_server_info = server_info;
 429
 430         return NT_STATUS_OK;
 431 }
 432
 433 NTSTATUS auth_system_server_info(TALLOC_CTX *mem_ctx, struct auth_serversupplied_info **_server_info)
 434 {
 435         struct auth_serversupplied_info *server_info;
 436         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
 437         NT_STATUS_HAVE_NO_MEMORY(server_info);
 438
 439         server_info->account_sid = dom_sid_parse_talloc(server_info, SID_NT_SYSTEM);
 440         NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid);
 441
 442         /* is this correct? */
 443         server_info->primary_group_sid = dom_sid_parse_talloc(server_info, SID_BUILTIN_ADMINISTRATORS);
 444         NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid);
 445
 446         server_info->n_domain_groups = 0;
 447         server_info->domain_groups = NULL;
 448
 449         /* annoying, but the Anonymous really does have a session key,
 450            and it is all zeros! */
 451         server_info->user_session_key = data_blob_talloc(server_info, NULL, 16);
 452         NT_STATUS_HAVE_NO_MEMORY(server_info->user_session_key.data);
 453
 454         server_info->lm_session_key = data_blob_talloc(server_info, NULL, 16);
 455         NT_STATUS_HAVE_NO_MEMORY(server_info->lm_session_key.data);
 456
 457         data_blob_clear(&server_info->user_session_key);
 458         data_blob_clear(&server_info->lm_session_key);
 459
 460         server_info->account_name = talloc_strdup(server_info, "SYSTEM");
 461         NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
 462
 463         server_info->domain_name = talloc_strdup(server_info, "NT AUTHORITY");
 464         NT_STATUS_HAVE_NO_MEMORY(server_info->domain_name);
 465
 466         server_info->full_name = talloc_strdup(server_info, "System");
 467         NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
 468
 469         server_info->logon_script = talloc_strdup(server_info, "");
 470         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
 471
 472         server_info->profile_path = talloc_strdup(server_info, "");
 473         NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
 474
 475         server_info->home_directory = talloc_strdup(server_info, "");
 476         NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
 477
 478         server_info->home_drive = talloc_strdup(server_info, "");
 479         NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
 480
 481         server_info->logon_server = talloc_strdup(server_info, lp_netbios_name());
 482         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_server);
 483
 484         server_info->last_logon = 0;
 485         server_info->last_logoff = 0;
 486         server_info->acct_expiry = 0;
 487         server_info->last_password_change = 0;
 488         server_info->allow_password_change = 0;
 489         server_info->force_password_change = 0;
 490
 491         server_info->logon_count = 0;
 492         server_info->bad_password_count = 0;
 493
 494         server_info->acct_flags = ACB_NORMAL;
 495
 496         server_info->authenticated = True;
 497
 498         *_server_info = server_info;
 499
 500         return NT_STATUS_OK;
 501 }
 502
 503 NTSTATUS auth_generate_session_info(TALLOC_CTX *mem_ctx,
 504                                     struct auth_serversupplied_info *server_info,
 505                                     struct auth_session_info **_session_info)
 506 {
 507         struct auth_session_info *session_info;
 508         NTSTATUS nt_status;
 509
 510         session_info = talloc(mem_ctx, struct auth_session_info);
 511         NT_STATUS_HAVE_NO_MEMORY(session_info);
 512
 513         session_info->server_info = talloc_reference(session_info, server_info);
 514
 515         /* unless set otherwise, the session key is the user session
 516          * key from the auth subsystem */
 517         session_info->session_key = server_info->user_session_key;
 518
 519         nt_status = security_token_create(session_info,
 520                                           server_info->account_sid,
 521                                           server_info->primary_group_sid,
 522                                           server_info->n_domain_groups,
 523                                           server_info->domain_groups,
 524                                           server_info->authenticated,
 525                                           &session_info->security_token);
 526         NT_STATUS_NOT_OK_RETURN(nt_status);
 527
 528         session_info->credentials = NULL;
 529
 530         *_session_info = session_info;
 531         return NT_STATUS_OK;
 532 }
 533
 534 NTSTATUS auth_anonymous_session_info(TALLOC_CTX *parent_ctx,
 535                                      struct auth_session_info **_session_info)
 536 {
 537         NTSTATUS nt_status;
 538         struct auth_serversupplied_info *server_info = NULL;
 539         struct auth_session_info *session_info = NULL;
 540         TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
 541
 542         nt_status = auth_anonymous_server_info(mem_ctx,
 543                                                &server_info);
 544         if (!NT_STATUS_IS_OK(nt_status)) {
 545                 talloc_free(mem_ctx);
 546                 return nt_status;
 547         }
 548
 549         /* references the server_info into the session_info */
 550         nt_status = auth_generate_session_info(parent_ctx, server_info, &session_info);
 551         talloc_free(mem_ctx);
 552
 553         NT_STATUS_NOT_OK_RETURN(nt_status);
 554
 555         session_info->credentials = cli_credentials_init(session_info);
 556         if (!session_info->credentials) {
 557                 return NT_STATUS_NO_MEMORY;
 558         }
 559
 560         cli_credentials_set_conf(session_info->credentials);
 561         cli_credentials_set_anonymous(session_info->credentials);
 562
 563         *_session_info = session_info;
 564
 565         return NT_STATUS_OK;
 566 }
 567
 568 struct auth_session_info *anonymous_session(TALLOC_CTX *mem_ctx)
 569 {
 570         NTSTATUS nt_status;
 571         struct auth_session_info *session_info = NULL;
 572         nt_status = auth_anonymous_session_info(mem_ctx, &session_info);
 573         if (!NT_STATUS_IS_OK(nt_status)) {
 574                 return NULL;
 575         }
 576         return session_info;
 577 }
 578
 579 NTSTATUS auth_system_session_info(TALLOC_CTX *parent_ctx,
 580                                   struct auth_session_info **_session_info)
 581 {
 582         NTSTATUS nt_status;
 583         struct auth_serversupplied_info *server_info = NULL;
 584         struct auth_session_info *session_info = NULL;
 585         TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
 586
 587         nt_status = auth_system_server_info(mem_ctx,
 588                                             &server_info);
 589         if (!NT_STATUS_IS_OK(nt_status)) {
 590                 talloc_free(mem_ctx);
 591                 return nt_status;
 592         }
 593
 594         /* references the server_info into the session_info */
 595         nt_status = auth_generate_session_info(parent_ctx, server_info, &session_info);
 596         talloc_free(mem_ctx);
 597
 598         NT_STATUS_NOT_OK_RETURN(nt_status);
 599
 600         session_info->credentials = cli_credentials_init(session_info);
 601         if (!session_info->credentials) {
 602                 return NT_STATUS_NO_MEMORY;
 603         }
 604
 605         cli_credentials_set_conf(session_info->credentials);
 606         cli_credentials_set_machine_account_pending(session_info->credentials);
 607         *_session_info = session_info;
 608
 609         return NT_STATUS_OK;
 610 }
 611
 612 struct auth_session_info *system_session(TALLOC_CTX *mem_ctx)
 613 {
 614         NTSTATUS nt_status;
 615         struct auth_session_info *session_info = NULL;
 616         nt_status = auth_system_session_info(mem_ctx, &session_info);
 617         if (!NT_STATUS_IS_OK(nt_status)) {
 618                 return NULL;
 619         }
 620         return session_info;
 621 }
 622
 623 /****************************************************************************
 624  prints a struct auth_session_info security token to debug output.
 625 ****************************************************************************/
 626 void auth_session_info_debug(int dbg_lev,
 627                              const struct auth_session_info *session_info)
 628 {
 629         if (!session_info) {
 630                 DEBUG(dbg_lev, ("Session Info: (NULL)\n"));
 631                 return;
 632         }
 633
 634         security_token_debug(dbg_lev, session_info->security_token);
 635 }
 636
 637 /**
 638  * Squash an NT_STATUS in line with security requirements.
 639  * In an attempt to avoid giving the whole game away when users
 640  * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
 641  * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
 642  * (session setups in particular).
 643  *
 644  * @param nt_status NTSTATUS input for squashing.
 645  * @return the 'squashed' nt_status
 646  **/
 647 NTSTATUS auth_nt_status_squash(NTSTATUS nt_status)
 648 {
 649         if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
 650                 /* Match WinXP and don't give the game away */
 651                 return NT_STATUS_LOGON_FAILURE;
 652         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
 653                 /* Match WinXP and don't give the game away */
 654                 return NT_STATUS_LOGON_FAILURE;
 655         }
 656
 657         return nt_status;
 658 }