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