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/security.h"
  28 #include "libcli/auth/libcli_auth.h"
  29 #include "dsdb/samdb/samdb.h"
  30 #include "auth/credentials/credentials.h"
  31 #include "auth/credentials/credentials_krb5.h"
  32
  33 /* this default function can be used by mostly all backends
  34  * which don't want to set a challenge
  35  */
  36 NTSTATUS auth_get_challenge_not_implemented(struct auth_method_context *ctx, TALLOC_CTX *mem_ctx, DATA_BLOB *challenge)
  37 {
  38         /* we don't want to set a challenge */
  39         return NT_STATUS_NOT_IMPLEMENTED;
  40 }
  41
  42 /****************************************************************************
  43  Create an auth_usersupplied_data structure after appropriate mapping.
  44 ****************************************************************************/
  45
  46 NTSTATUS map_user_info(TALLOC_CTX *mem_ctx,
  47                        const struct auth_usersupplied_info *user_info,
  48                        struct auth_usersupplied_info **user_info_mapped)
  49 {
  50         const char *domain;
  51         char *account_name;
  52         char *d;
  53         DEBUG(5,("map_user_info: Mapping user [%s]\\[%s] from workstation [%s]\n",
  54                 user_info->client.domain_name, user_info->client.account_name, user_info->workstation_name));
  55
  56         account_name = talloc_strdup(mem_ctx, user_info->client.account_name);
  57         if (!account_name) {
  58                 return NT_STATUS_NO_MEMORY;
  59         }
  60
  61         /* don't allow "" as a domain, fixes a Win9X bug
  62            where it doens't supply a domain for logon script
  63            'net use' commands.                                 */
  64
  65         /* Split user@realm names into user and realm components.  This is TODO to fix with proper userprincipalname support */
  66         if (user_info->client.domain_name && *user_info->client.domain_name) {
  67                 domain = user_info->client.domain_name;
  68         } else if (strchr_m(user_info->client.account_name, '@')) {
  69                 d = strchr_m(account_name, '@');
  70                 if (!d) {
  71                         return NT_STATUS_INTERNAL_ERROR;
  72                 }
  73                 d[0] = '\0';
  74                 d++;
  75                 domain = d;
  76         } else {
  77                 domain = lp_workgroup();
  78         }
  79
  80         *user_info_mapped = talloc(mem_ctx, struct auth_usersupplied_info);
  81         if (!*user_info_mapped) {
  82                 return NT_STATUS_NO_MEMORY;
  83         }
  84         talloc_reference(*user_info_mapped, user_info);
  85         **user_info_mapped = *user_info;
  86         (*user_info_mapped)->mapped_state = True;
  87         (*user_info_mapped)->mapped.domain_name = talloc_strdup(*user_info_mapped, domain);
  88         (*user_info_mapped)->mapped.account_name = talloc_strdup(*user_info_mapped, account_name);
  89         talloc_free(account_name);
  90         if (!(*user_info_mapped)->mapped.domain_name
  91             || !(*user_info_mapped)->mapped.account_name) {
  92                 return NT_STATUS_NO_MEMORY;
  93         }
  94
  95         return NT_STATUS_OK;
  96 }
  97
  98 /****************************************************************************
  99  Create an auth_usersupplied_data structure after appropriate mapping.
 100 ****************************************************************************/
 101
 102  NTSTATUS encrypt_user_info(TALLOC_CTX *mem_ctx, struct auth_context *auth_context,
 103                            enum auth_password_state to_state,
 104                            const struct auth_usersupplied_info *user_info_in,
 105                            const struct auth_usersupplied_info **user_info_encrypted)
 106 {
 107         NTSTATUS nt_status;
 108         struct auth_usersupplied_info *user_info_temp;
 109         switch (to_state) {
 110         case AUTH_PASSWORD_RESPONSE:
 111                 switch (user_info_in->password_state) {
 112                 case AUTH_PASSWORD_PLAIN:
 113                 {
 114                         const struct auth_usersupplied_info *user_info_temp2;
 115                         nt_status = encrypt_user_info(mem_ctx, auth_context,
 116                                                       AUTH_PASSWORD_HASH,
 117                                                       user_info_in, &user_info_temp2);
 118                         if (!NT_STATUS_IS_OK(nt_status)) {
 119                                 return nt_status;
 120                         }
 121                         user_info_in = user_info_temp2;
 122                         /* fall through */
 123                 }
 124                 case AUTH_PASSWORD_HASH:
 125                 {
 126                         const uint8_t *challenge;
 127                         DATA_BLOB chall_blob;
 128                         user_info_temp = talloc(mem_ctx, struct auth_usersupplied_info);
 129                         if (!user_info_temp) {
 130                                 return NT_STATUS_NO_MEMORY;
 131                         }
 132                         talloc_reference(user_info_temp, user_info_in);
 133                         *user_info_temp = *user_info_in;
 134                         user_info_temp->mapped_state = to_state;
 135
 136                         nt_status = auth_get_challenge(auth_context, &challenge);
 137                         if (!NT_STATUS_IS_OK(nt_status)) {
 138                                 return nt_status;
 139                         }
 140
 141                         chall_blob = data_blob_talloc(mem_ctx, challenge, 8);
 142                         if (lp_client_ntlmv2_auth()) {
 143                                 DATA_BLOB names_blob = NTLMv2_generate_names_blob(mem_ctx, lp_netbios_name(), lp_workgroup());
 144                                 DATA_BLOB lmv2_response, ntlmv2_response, lmv2_session_key, ntlmv2_session_key;
 145
 146                                 if (!SMBNTLMv2encrypt_hash(user_info_temp,
 147                                                            user_info_in->client.account_name,
 148                                                            user_info_in->client.domain_name,
 149                                                            user_info_in->password.hash.nt->hash, &chall_blob,
 150                                                            &names_blob,
 151                                                            &lmv2_response, &ntlmv2_response,
 152                                                            &lmv2_session_key, &ntlmv2_session_key)) {
 153                                         data_blob_free(&names_blob);
 154                                         return NT_STATUS_NO_MEMORY;
 155                                 }
 156                                 data_blob_free(&names_blob);
 157                                 user_info_temp->password.response.lanman = lmv2_response;
 158                                 user_info_temp->password.response.nt = ntlmv2_response;
 159
 160                                 data_blob_free(&lmv2_session_key);
 161                                 data_blob_free(&ntlmv2_session_key);
 162                         } else {
 163                                 DATA_BLOB blob = data_blob_talloc(mem_ctx, NULL, 24);
 164                                 SMBOWFencrypt(user_info_in->password.hash.nt->hash, challenge, blob.data);
 165
 166                                 user_info_temp->password.response.nt = blob;
 167                                 if (lp_client_lanman_auth() && user_info_in->password.hash.lanman) {
 168                                         DATA_BLOB lm_blob = data_blob_talloc(mem_ctx, NULL, 24);
 169                                         SMBOWFencrypt(user_info_in->password.hash.lanman->hash, challenge, blob.data);
 170                                         user_info_temp->password.response.lanman = lm_blob;
 171                                 } else {
 172                                         /* if not sending the LM password, send the NT password twice */
 173                                         user_info_temp->password.response.lanman = user_info_temp->password.response.nt;
 174                                 }
 175                         }
 176
 177                         user_info_in = user_info_temp;
 178                         /* fall through */
 179                 }
 180                 case AUTH_PASSWORD_RESPONSE:
 181                         *user_info_encrypted = user_info_in;
 182                 }
 183                 break;
 184         case AUTH_PASSWORD_HASH:
 185         {
 186                 switch (user_info_in->password_state) {
 187                 case AUTH_PASSWORD_PLAIN:
 188                 {
 189                         struct samr_Password lanman;
 190                         struct samr_Password nt;
 191
 192                         user_info_temp = talloc(mem_ctx, struct auth_usersupplied_info);
 193                         if (!user_info_temp) {
 194                                 return NT_STATUS_NO_MEMORY;
 195                         }
 196                         talloc_reference(user_info_temp, user_info_in);
 197                         *user_info_temp = *user_info_in;
 198                         user_info_temp->mapped_state = to_state;
 199
 200                         if (E_deshash(user_info_in->password.plaintext, lanman.hash)) {
 201                                 user_info_temp->password.hash.lanman = talloc(user_info_temp,
 202                                                                               struct samr_Password);
 203                                 *user_info_temp->password.hash.lanman = lanman;
 204                         } else {
 205                                 user_info_temp->password.hash.lanman = NULL;
 206                         }
 207
 208                         E_md4hash(user_info_in->password.plaintext, nt.hash);
 209                         user_info_temp->password.hash.nt = talloc(user_info_temp,
 210                                                                    struct samr_Password);
 211                         *user_info_temp->password.hash.nt = nt;
 212
 213                         user_info_in = user_info_temp;
 214                         /* fall through */
 215                 }
 216                 case AUTH_PASSWORD_HASH:
 217                         *user_info_encrypted = user_info_in;
 218                         break;
 219                 default:
 220                         return NT_STATUS_INVALID_PARAMETER;
 221                         break;
 222                 }
 223                 break;
 224         }
 225         default:
 226                 return NT_STATUS_INVALID_PARAMETER;
 227         }
 228
 229         return NT_STATUS_OK;
 230 }
 231
 232 /***************************************************************************
 233  Make a server_info struct from the info3 returned by a domain logon
 234 ***************************************************************************/
 235 NTSTATUS make_server_info_netlogon_validation(TALLOC_CTX *mem_ctx,
 236                                               const char *account_name,
 237                                               uint16_t validation_level,
 238                                               union netr_Validation *validation,
 239                                               struct auth_serversupplied_info **_server_info)
 240 {
 241         struct auth_serversupplied_info *server_info;
 242         struct netr_SamBaseInfo *base = NULL;
 243         int i;
 244
 245         switch (validation_level) {
 246         case 2:
 247                 if (!validation || !validation->sam2) {
 248                         return NT_STATUS_INVALID_PARAMETER;
 249                 }
 250                 base = &validation->sam2->base;
 251                 break;
 252         case 3:
 253                 if (!validation || !validation->sam3) {
 254                         return NT_STATUS_INVALID_PARAMETER;
 255                 }
 256                 base = &validation->sam3->base;
 257                 break;
 258         case 6:
 259                 if (!validation || !validation->sam6) {
 260                         return NT_STATUS_INVALID_PARAMETER;
 261                 }
 262                 base = &validation->sam6->base;
 263                 break;
 264         default:
 265                 return NT_STATUS_INVALID_LEVEL;
 266         }
 267
 268         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
 269         NT_STATUS_HAVE_NO_MEMORY(server_info);
 270
 271         /*
 272            Here is where we should check the list of
 273            trusted domains, and verify that the SID
 274            matches.
 275         */
 276         server_info->account_sid = dom_sid_add_rid(server_info, base->domain_sid, base->rid);
 277         NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid);
 278
 279
 280         server_info->primary_group_sid = dom_sid_add_rid(server_info, base->domain_sid, base->primary_gid);
 281         NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid);
 282
 283         server_info->n_domain_groups = base->groups.count;
 284         if (base->groups.count) {
 285                 server_info->domain_groups = talloc_array(server_info, struct dom_sid*, base->groups.count);
 286                 NT_STATUS_HAVE_NO_MEMORY(server_info->domain_groups);
 287         } else {
 288                 server_info->domain_groups = NULL;
 289         }
 290
 291         for (i = 0; i < base->groups.count; i++) {
 292                 server_info->domain_groups[i] = dom_sid_add_rid(server_info, base->domain_sid, base->groups.rids[i].rid);
 293                 NT_STATUS_HAVE_NO_MEMORY(server_info->domain_groups[i]);
 294         }
 295
 296         /* Copy 'other' sids.  We need to do sid filtering here to
 297            prevent possible elevation of privileges.  See:
 298
 299            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 300          */
 301
 302         if (validation_level == 3) {
 303                 struct dom_sid **dgrps = server_info->domain_groups;
 304                 size_t sidcount = server_info->n_domain_groups + validation->sam3->sidcount;
 305                 size_t n_dgrps = server_info->n_domain_groups;
 306
 307                 if (validation->sam3->sidcount > 0) {
 308                         dgrps = talloc_realloc(server_info, dgrps, struct dom_sid*, sidcount);
 309                         NT_STATUS_HAVE_NO_MEMORY(dgrps);
 310
 311                         for (i = 0; i < validation->sam3->sidcount; i++) {
 312                                 dgrps[n_dgrps + i] = talloc_reference(dgrps, validation->sam3->sids[i].sid);
 313                         }
 314                 }
 315
 316                 server_info->n_domain_groups = sidcount;
 317                 server_info->domain_groups = dgrps;
 318
 319                 /* Where are the 'global' sids?... */
 320         }
 321
 322         if (base->account_name.string) {
 323                 server_info->account_name = talloc_reference(server_info, base->account_name.string);
 324         } else {
 325                 server_info->account_name = talloc_strdup(server_info, account_name);
 326                 NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
 327         }
 328
 329         server_info->domain_name = talloc_reference(server_info, base->domain.string);
 330         server_info->full_name = talloc_reference(server_info, base->full_name.string);
 331         server_info->logon_script = talloc_reference(server_info, base->logon_script.string);
 332         server_info->profile_path = talloc_reference(server_info, base->profile_path.string);
 333         server_info->home_directory = talloc_reference(server_info, base->home_directory.string);
 334         server_info->home_drive = talloc_reference(server_info, base->home_drive.string);
 335         server_info->logon_server = talloc_reference(server_info, base->logon_server.string);
 336         server_info->last_logon = base->last_logon;
 337         server_info->last_logoff = base->last_logoff;
 338         server_info->acct_expiry = base->acct_expiry;
 339         server_info->last_password_change = base->last_password_change;
 340         server_info->allow_password_change = base->allow_password_change;
 341         server_info->force_password_change = base->force_password_change;
 342         server_info->logon_count = base->logon_count;
 343         server_info->bad_password_count = base->bad_password_count;
 344         server_info->acct_flags = base->acct_flags;
 345
 346         server_info->authenticated = True;
 347
 348         /* ensure we are never given NULL session keys */
 349
 350         if (all_zero(base->key.key, sizeof(base->key.key))) {
 351                 server_info->user_session_key = data_blob(NULL, 0);
 352         } else {
 353                 server_info->user_session_key = data_blob_talloc(server_info, base->key.key, sizeof(base->key.key));
 354                 NT_STATUS_HAVE_NO_MEMORY(server_info->user_session_key.data);
 355         }
 356
 357         if (all_zero(base->LMSessKey.key, sizeof(base->LMSessKey.key))) {
 358                 server_info->lm_session_key = data_blob(NULL, 0);
 359         } else {
 360                 server_info->lm_session_key = data_blob_talloc(server_info, base->LMSessKey.key, sizeof(base->LMSessKey.key));
 361                 NT_STATUS_HAVE_NO_MEMORY(server_info->lm_session_key.data);
 362         }
 363
 364         *_server_info = server_info;
 365         return NT_STATUS_OK;
 366 }
 367
 368
 369 NTSTATUS auth_anonymous_server_info(TALLOC_CTX *mem_ctx, struct auth_serversupplied_info **_server_info)
 370 {
 371         struct auth_serversupplied_info *server_info;
 372         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
 373         NT_STATUS_HAVE_NO_MEMORY(server_info);
 374
 375         server_info->account_sid = dom_sid_parse_talloc(server_info, SID_NT_ANONYMOUS);
 376         NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid);
 377
 378         /* is this correct? */
 379         server_info->primary_group_sid = dom_sid_parse_talloc(server_info, SID_BUILTIN_GUESTS);
 380         NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid);
 381
 382         server_info->n_domain_groups = 0;
 383         server_info->domain_groups = NULL;
 384
 385         /* annoying, but the Anonymous really does have a session key,
 386            and it is all zeros! */
 387         server_info->user_session_key = data_blob_talloc(server_info, NULL, 16);
 388         NT_STATUS_HAVE_NO_MEMORY(server_info->user_session_key.data);
 389
 390         server_info->lm_session_key = data_blob_talloc(server_info, NULL, 16);
 391         NT_STATUS_HAVE_NO_MEMORY(server_info->lm_session_key.data);
 392
 393         data_blob_clear(&server_info->user_session_key);
 394         data_blob_clear(&server_info->lm_session_key);
 395
 396         server_info->account_name = talloc_strdup(server_info, "ANONYMOUS LOGON");
 397         NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
 398
 399         server_info->domain_name = talloc_strdup(server_info, "NT AUTHORITY");
 400         NT_STATUS_HAVE_NO_MEMORY(server_info->domain_name);
 401
 402         server_info->full_name = talloc_strdup(server_info, "Anonymous Logon");
 403         NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
 404
 405         server_info->logon_script = talloc_strdup(server_info, "");
 406         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
 407
 408         server_info->profile_path = talloc_strdup(server_info, "");
 409         NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
 410
 411         server_info->home_directory = talloc_strdup(server_info, "");
 412         NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
 413
 414         server_info->home_drive = talloc_strdup(server_info, "");
 415         NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
 416
 417         server_info->logon_server = talloc_strdup(server_info, lp_netbios_name());
 418         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_server);
 419
 420         server_info->last_logon = 0;
 421         server_info->last_logoff = 0;
 422         server_info->acct_expiry = 0;
 423         server_info->last_password_change = 0;
 424         server_info->allow_password_change = 0;
 425         server_info->force_password_change = 0;
 426
 427         server_info->logon_count = 0;
 428         server_info->bad_password_count = 0;
 429
 430         server_info->acct_flags = ACB_NORMAL;
 431
 432         server_info->authenticated = False;
 433
 434         *_server_info = server_info;
 435
 436         return NT_STATUS_OK;
 437 }
 438
 439 NTSTATUS auth_system_server_info(TALLOC_CTX *mem_ctx, struct auth_serversupplied_info **_server_info)
 440 {
 441         struct auth_serversupplied_info *server_info;
 442         server_info = talloc(mem_ctx, struct auth_serversupplied_info);
 443         NT_STATUS_HAVE_NO_MEMORY(server_info);
 444
 445         server_info->account_sid = dom_sid_parse_talloc(server_info, SID_NT_SYSTEM);
 446         NT_STATUS_HAVE_NO_MEMORY(server_info->account_sid);
 447
 448         /* is this correct? */
 449         server_info->primary_group_sid = dom_sid_parse_talloc(server_info, SID_BUILTIN_ADMINISTRATORS);
 450         NT_STATUS_HAVE_NO_MEMORY(server_info->primary_group_sid);
 451
 452         server_info->n_domain_groups = 0;
 453         server_info->domain_groups = NULL;
 454
 455         /* annoying, but the Anonymous really does have a session key,
 456            and it is all zeros! */
 457         server_info->user_session_key = data_blob_talloc(server_info, NULL, 16);
 458         NT_STATUS_HAVE_NO_MEMORY(server_info->user_session_key.data);
 459
 460         server_info->lm_session_key = data_blob_talloc(server_info, NULL, 16);
 461         NT_STATUS_HAVE_NO_MEMORY(server_info->lm_session_key.data);
 462
 463         data_blob_clear(&server_info->user_session_key);
 464         data_blob_clear(&server_info->lm_session_key);
 465
 466         server_info->account_name = talloc_strdup(server_info, "SYSTEM");
 467         NT_STATUS_HAVE_NO_MEMORY(server_info->account_name);
 468
 469         server_info->domain_name = talloc_strdup(server_info, "NT AUTHORITY");
 470         NT_STATUS_HAVE_NO_MEMORY(server_info->domain_name);
 471
 472         server_info->full_name = talloc_strdup(server_info, "System");
 473         NT_STATUS_HAVE_NO_MEMORY(server_info->full_name);
 474
 475         server_info->logon_script = talloc_strdup(server_info, "");
 476         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_script);
 477
 478         server_info->profile_path = talloc_strdup(server_info, "");
 479         NT_STATUS_HAVE_NO_MEMORY(server_info->profile_path);
 480
 481         server_info->home_directory = talloc_strdup(server_info, "");
 482         NT_STATUS_HAVE_NO_MEMORY(server_info->home_directory);
 483
 484         server_info->home_drive = talloc_strdup(server_info, "");
 485         NT_STATUS_HAVE_NO_MEMORY(server_info->home_drive);
 486
 487         server_info->logon_server = talloc_strdup(server_info, lp_netbios_name());
 488         NT_STATUS_HAVE_NO_MEMORY(server_info->logon_server);
 489
 490         server_info->last_logon = 0;
 491         server_info->last_logoff = 0;
 492         server_info->acct_expiry = 0;
 493         server_info->last_password_change = 0;
 494         server_info->allow_password_change = 0;
 495         server_info->force_password_change = 0;
 496
 497         server_info->logon_count = 0;
 498         server_info->bad_password_count = 0;
 499
 500         server_info->acct_flags = ACB_NORMAL;
 501
 502         server_info->authenticated = True;
 503
 504         *_server_info = server_info;
 505
 506         return NT_STATUS_OK;
 507 }
 508
 509 NTSTATUS auth_generate_session_info(TALLOC_CTX *mem_ctx,
 510                                     struct auth_serversupplied_info *server_info,
 511                                     struct auth_session_info **_session_info)
 512 {
 513         struct auth_session_info *session_info;
 514         NTSTATUS nt_status;
 515
 516         session_info = talloc(mem_ctx, struct auth_session_info);
 517         NT_STATUS_HAVE_NO_MEMORY(session_info);
 518
 519         session_info->server_info = talloc_reference(session_info, server_info);
 520
 521         /* unless set otherwise, the session key is the user session
 522          * key from the auth subsystem */
 523         session_info->session_key = server_info->user_session_key;
 524
 525         nt_status = security_token_create(session_info,
 526                                           server_info->account_sid,
 527                                           server_info->primary_group_sid,
 528                                           server_info->n_domain_groups,
 529                                           server_info->domain_groups,
 530                                           server_info->authenticated,
 531                                           &session_info->security_token);
 532         NT_STATUS_NOT_OK_RETURN(nt_status);
 533
 534         session_info->credentials = NULL;
 535
 536         *_session_info = session_info;
 537         return NT_STATUS_OK;
 538 }
 539
 540 NTSTATUS auth_anonymous_session_info(TALLOC_CTX *parent_ctx,
 541                                      struct auth_session_info **_session_info)
 542 {
 543         NTSTATUS nt_status;
 544         struct auth_serversupplied_info *server_info = NULL;
 545         struct auth_session_info *session_info = NULL;
 546         TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
 547
 548         nt_status = auth_anonymous_server_info(mem_ctx,
 549                                                &server_info);
 550         if (!NT_STATUS_IS_OK(nt_status)) {
 551                 talloc_free(mem_ctx);
 552                 return nt_status;
 553         }
 554
 555         /* references the server_info into the session_info */
 556         nt_status = auth_generate_session_info(parent_ctx, server_info, &session_info);
 557         talloc_free(mem_ctx);
 558
 559         NT_STATUS_NOT_OK_RETURN(nt_status);
 560
 561         session_info->credentials = cli_credentials_init(session_info);
 562         if (!session_info->credentials) {
 563                 return NT_STATUS_NO_MEMORY;
 564         }
 565
 566         cli_credentials_set_conf(session_info->credentials);
 567         cli_credentials_set_anonymous(session_info->credentials);
 568
 569         *_session_info = session_info;
 570
 571         return NT_STATUS_OK;
 572 }
 573
 574 struct auth_session_info *anonymous_session(TALLOC_CTX *mem_ctx)
 575 {
 576         NTSTATUS nt_status;
 577         struct auth_session_info *session_info = NULL;
 578         nt_status = auth_anonymous_session_info(mem_ctx, &session_info);
 579         if (!NT_STATUS_IS_OK(nt_status)) {
 580                 return NULL;
 581         }
 582         return session_info;
 583 }
 584
 585 NTSTATUS auth_system_session_info(TALLOC_CTX *parent_ctx,
 586                                   struct auth_session_info **_session_info)
 587 {
 588         NTSTATUS nt_status;
 589         struct auth_serversupplied_info *server_info = NULL;
 590         struct auth_session_info *session_info = NULL;
 591         TALLOC_CTX *mem_ctx = talloc_new(parent_ctx);
 592
 593         nt_status = auth_system_server_info(mem_ctx,
 594                                             &server_info);
 595         if (!NT_STATUS_IS_OK(nt_status)) {
 596                 talloc_free(mem_ctx);
 597                 return nt_status;
 598         }
 599
 600         /* references the server_info into the session_info */
 601         nt_status = auth_generate_session_info(parent_ctx, server_info, &session_info);
 602         talloc_free(mem_ctx);
 603
 604         NT_STATUS_NOT_OK_RETURN(nt_status);
 605
 606         session_info->credentials = cli_credentials_init(session_info);
 607         if (!session_info->credentials) {
 608                 return NT_STATUS_NO_MEMORY;
 609         }
 610
 611         cli_credentials_set_conf(session_info->credentials);
 612
 613         if (lp_parm_bool(-1,"system","anonymous", False)) {
 614                 cli_credentials_set_anonymous(session_info->credentials);
 615         } else {
 616                 cli_credentials_set_machine_account_pending(session_info->credentials);
 617         }
 618         *_session_info = session_info;
 619
 620         return NT_STATUS_OK;
 621 }
 622
 623 struct auth_session_info *system_session(TALLOC_CTX *mem_ctx)
 624 {
 625         NTSTATUS nt_status;
 626         struct auth_session_info *session_info = NULL;
 627         nt_status = auth_system_session_info(mem_ctx, &session_info);
 628         if (!NT_STATUS_IS_OK(nt_status)) {
 629                 return NULL;
 630         }
 631         return session_info;
 632 }
 633
 634 /****************************************************************************
 635  prints a struct auth_session_info security token to debug output.
 636 ****************************************************************************/
 637 void auth_session_info_debug(int dbg_lev,
 638                              const struct auth_session_info *session_info)
 639 {
 640         if (!session_info) {
 641                 DEBUG(dbg_lev, ("Session Info: (NULL)\n"));
 642                 return;
 643         }
 644
 645         security_token_debug(dbg_lev, session_info->security_token);
 646 }
 647
 648 /**
 649  * Squash an NT_STATUS in line with security requirements.
 650  * In an attempt to avoid giving the whole game away when users
 651  * are authenticating, NT replaces both NT_STATUS_NO_SUCH_USER and
 652  * NT_STATUS_WRONG_PASSWORD with NT_STATUS_LOGON_FAILURE in certain situations
 653  * (session setups in particular).
 654  *
 655  * @param nt_status NTSTATUS input for squashing.
 656  * @return the 'squashed' nt_status
 657  **/
 658 NTSTATUS auth_nt_status_squash(NTSTATUS nt_status)
 659 {
 660         if NT_STATUS_EQUAL(nt_status, NT_STATUS_NO_SUCH_USER) {
 661                 /* Match WinXP and don't give the game away */
 662                 return NT_STATUS_LOGON_FAILURE;
 663         } else if NT_STATUS_EQUAL(nt_status, NT_STATUS_WRONG_PASSWORD) {
 664                 /* Match WinXP and don't give the game away */
 665                 return NT_STATUS_LOGON_FAILURE;
 666         }
 667
 668         return nt_status;
 669 }