source3/auth/auth_util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Authentication utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Andrew Bartlett 2001-2011
   6    Copyright (C) Jeremy Allison 2000-2001
   7    Copyright (C) Rafal Szczesniak 2002
   8    Copyright (C) Volker Lendecke 2006
   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 3 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, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "auth.h"
  26 #include "../libcli/auth/libcli_auth.h"
  27 #include "../lib/crypto/arcfour.h"
  28 #include "rpc_client/init_lsa.h"
  29 #include "../libcli/security/security.h"
  30 #include "../lib/util/util_pw.h"
  31 #include "lib/winbind_util.h"
  32 #include "passdb.h"
  33
  34 #undef DBGC_CLASS
  35 #define DBGC_CLASS DBGC_AUTH
  36
  37 static struct auth3_session_info *copy_serverinfo_session_info(TALLOC_CTX *mem_ctx,
  38                                                                const struct auth_serversupplied_info *src);
  39
  40 /****************************************************************************
  41  Create a UNIX user on demand.
  42 ****************************************************************************/
  43
  44 static int _smb_create_user(const char *domain, const char *unix_username, const char *homedir)
  45 {
  46         TALLOC_CTX *ctx = talloc_tos();
  47         char *add_script;
  48         int ret;
  49
  50         add_script = talloc_strdup(ctx, lp_adduser_script());
  51         if (!add_script || !*add_script) {
  52                 return -1;
  53         }
  54         add_script = talloc_all_string_sub(ctx,
  55                                 add_script,
  56                                 "%u",
  57                                 unix_username);
  58         if (!add_script) {
  59                 return -1;
  60         }
  61         if (domain) {
  62                 add_script = talloc_all_string_sub(ctx,
  63                                         add_script,
  64                                         "%D",
  65                                         domain);
  66                 if (!add_script) {
  67                         return -1;
  68                 }
  69         }
  70         if (homedir) {
  71                 add_script = talloc_all_string_sub(ctx,
  72                                 add_script,
  73                                 "%H",
  74                                 homedir);
  75                 if (!add_script) {
  76                         return -1;
  77                 }
  78         }
  79         ret = smbrun(add_script,NULL);
  80         flush_pwnam_cache();
  81         DEBUG(ret ? 0 : 3,
  82                 ("smb_create_user: Running the command `%s' gave %d\n",
  83                  add_script,ret));
  84         return ret;
  85 }
  86
  87 /****************************************************************************
  88  Create an auth_usersupplied_data structure after appropriate mapping.
  89 ****************************************************************************/
  90
  91 NTSTATUS make_user_info_map(struct auth_usersupplied_info **user_info,
  92                             const char *smb_name,
  93                             const char *client_domain,
  94                             const char *workstation_name,
  95                             const struct tsocket_address *remote_address,
  96                             DATA_BLOB *lm_pwd,
  97                             DATA_BLOB *nt_pwd,
  98                             const struct samr_Password *lm_interactive_pwd,
  99                             const struct samr_Password *nt_interactive_pwd,
 100                             const char *plaintext,
 101                             enum auth_password_state password_state)
 102 {
 103         const char *domain;
 104         NTSTATUS result;
 105         bool was_mapped;
 106         char *internal_username = NULL;
 107
 108         was_mapped = map_username(talloc_tos(), smb_name, &internal_username);
 109         if (!internal_username) {
 110                 return NT_STATUS_NO_MEMORY;
 111         }
 112
 113         DEBUG(5, ("Mapping user [%s]\\[%s] from workstation [%s]\n",
 114                  client_domain, smb_name, workstation_name));
 115
 116         domain = client_domain;
 117
 118         /* If you connect to a Windows domain member using a bogus domain name,
 119          * the Windows box will map the BOGUS\user to SAMNAME\user.  Thus, if
 120          * the Windows box is a DC the name will become DOMAIN\user and be
 121          * authenticated against AD, if the Windows box is a member server but
 122          * not a DC the name will become WORKSTATION\user.  A standalone
 123          * non-domain member box will also map to WORKSTATION\user.
 124          * This also deals with the client passing in a "" domain */
 125
 126         if (!is_trusted_domain(domain) &&
 127             !strequal(domain, my_sam_name()))
 128         {
 129                 if (lp_map_untrusted_to_domain())
 130                         domain = my_sam_name();
 131                 else
 132                         domain = get_global_sam_name();
 133                 DEBUG(5, ("Mapped domain from [%s] to [%s] for user [%s] from "
 134                           "workstation [%s]\n",
 135                           client_domain, domain, smb_name, workstation_name));
 136         }
 137
 138         /* We know that the given domain is trusted (and we are allowing them),
 139          * it is our global SAM name, or for legacy behavior it is our
 140          * primary domain name */
 141
 142         result = make_user_info(user_info, smb_name, internal_username,
 143                               client_domain, domain, workstation_name,
 144                               remote_address, lm_pwd, nt_pwd,
 145                               lm_interactive_pwd, nt_interactive_pwd,
 146                               plaintext, password_state);
 147         if (NT_STATUS_IS_OK(result)) {
 148                 /* We have tried mapping */
 149                 (*user_info)->mapped_state = True;
 150                 /* did we actually map the user to a different name? */
 151                 (*user_info)->was_mapped = was_mapped;
 152         }
 153         return result;
 154 }
 155
 156 /****************************************************************************
 157  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 158  Decrypt and encrypt the passwords.
 159 ****************************************************************************/
 160
 161 bool make_user_info_netlogon_network(struct auth_usersupplied_info **user_info,
 162                                      const char *smb_name,
 163                                      const char *client_domain,
 164                                      const char *workstation_name,
 165                                      const struct tsocket_address *remote_address,
 166                                      uint32 logon_parameters,
 167                                      const uchar *lm_network_pwd,
 168                                      int lm_pwd_len,
 169                                      const uchar *nt_network_pwd,
 170                                      int nt_pwd_len)
 171 {
 172         bool ret;
 173         NTSTATUS status;
 174         DATA_BLOB lm_blob = data_blob(lm_network_pwd, lm_pwd_len);
 175         DATA_BLOB nt_blob = data_blob(nt_network_pwd, nt_pwd_len);
 176
 177         status = make_user_info_map(user_info,
 178                                     smb_name, client_domain,
 179                                     workstation_name,
 180                                     remote_address,
 181                                     lm_pwd_len ? &lm_blob : NULL,
 182                                     nt_pwd_len ? &nt_blob : NULL,
 183                                     NULL, NULL, NULL,
 184                                     AUTH_PASSWORD_RESPONSE);
 185
 186         if (NT_STATUS_IS_OK(status)) {
 187                 (*user_info)->logon_parameters = logon_parameters;
 188         }
 189         ret = NT_STATUS_IS_OK(status) ? True : False;
 190
 191         data_blob_free(&lm_blob);
 192         data_blob_free(&nt_blob);
 193         return ret;
 194 }
 195
 196 /****************************************************************************
 197  Create an auth_usersupplied_data, making the DATA_BLOBs here.
 198  Decrypt and encrypt the passwords.
 199 ****************************************************************************/
 200
 201 bool make_user_info_netlogon_interactive(struct auth_usersupplied_info **user_info,
 202                                          const char *smb_name,
 203                                          const char *client_domain,
 204                                          const char *workstation_name,
 205                                          const struct tsocket_address *remote_address,
 206                                          uint32 logon_parameters,
 207                                          const uchar chal[8],
 208                                          const uchar lm_interactive_pwd[16],
 209                                          const uchar nt_interactive_pwd[16],
 210                                          const uchar *dc_sess_key)
 211 {
 212         struct samr_Password lm_pwd;
 213         struct samr_Password nt_pwd;
 214         unsigned char local_lm_response[24];
 215         unsigned char local_nt_response[24];
 216         unsigned char key[16];
 217
 218         memcpy(key, dc_sess_key, 16);
 219
 220         if (lm_interactive_pwd)
 221                 memcpy(lm_pwd.hash, lm_interactive_pwd, sizeof(lm_pwd.hash));
 222
 223         if (nt_interactive_pwd)
 224                 memcpy(nt_pwd.hash, nt_interactive_pwd, sizeof(nt_pwd.hash));
 225
 226 #ifdef DEBUG_PASSWORD
 227         DEBUG(100,("key:"));
 228         dump_data(100, key, sizeof(key));
 229
 230         DEBUG(100,("lm owf password:"));
 231         dump_data(100, lm_pwd.hash, sizeof(lm_pwd.hash));
 232
 233         DEBUG(100,("nt owf password:"));
 234         dump_data(100, nt_pwd.hash, sizeof(nt_pwd.hash));
 235 #endif
 236
 237         if (lm_interactive_pwd)
 238                 arcfour_crypt(lm_pwd.hash, key, sizeof(lm_pwd.hash));
 239
 240         if (nt_interactive_pwd)
 241                 arcfour_crypt(nt_pwd.hash, key, sizeof(nt_pwd.hash));
 242
 243 #ifdef DEBUG_PASSWORD
 244         DEBUG(100,("decrypt of lm owf password:"));
 245         dump_data(100, lm_pwd.hash, sizeof(lm_pwd));
 246
 247         DEBUG(100,("decrypt of nt owf password:"));
 248         dump_data(100, nt_pwd.hash, sizeof(nt_pwd));
 249 #endif
 250
 251         if (lm_interactive_pwd)
 252                 SMBOWFencrypt(lm_pwd.hash, chal,
 253                               local_lm_response);
 254
 255         if (nt_interactive_pwd)
 256                 SMBOWFencrypt(nt_pwd.hash, chal,
 257                               local_nt_response);
 258
 259         /* Password info paranoia */
 260         ZERO_STRUCT(key);
 261
 262         {
 263                 bool ret;
 264                 NTSTATUS nt_status;
 265                 DATA_BLOB local_lm_blob;
 266                 DATA_BLOB local_nt_blob;
 267
 268                 if (lm_interactive_pwd) {
 269                         local_lm_blob = data_blob(local_lm_response,
 270                                                   sizeof(local_lm_response));
 271                 }
 272
 273                 if (nt_interactive_pwd) {
 274                         local_nt_blob = data_blob(local_nt_response,
 275                                                   sizeof(local_nt_response));
 276                 }
 277
 278                 nt_status = make_user_info_map(
 279                         user_info,
 280                         smb_name, client_domain, workstation_name,
 281                         remote_address,
 282                         lm_interactive_pwd ? &local_lm_blob : NULL,
 283                         nt_interactive_pwd ? &local_nt_blob : NULL,
 284                         lm_interactive_pwd ? &lm_pwd : NULL,
 285                         nt_interactive_pwd ? &nt_pwd : NULL,
 286                         NULL, AUTH_PASSWORD_HASH);
 287
 288                 if (NT_STATUS_IS_OK(nt_status)) {
 289                         (*user_info)->logon_parameters = logon_parameters;
 290                 }
 291
 292                 ret = NT_STATUS_IS_OK(nt_status) ? True : False;
 293                 data_blob_free(&local_lm_blob);
 294                 data_blob_free(&local_nt_blob);
 295                 return ret;
 296         }
 297 }
 298
 299
 300 /****************************************************************************
 301  Create an auth_usersupplied_data structure
 302 ****************************************************************************/
 303
 304 bool make_user_info_for_reply(struct auth_usersupplied_info **user_info,
 305                               const char *smb_name,
 306                               const char *client_domain,
 307                               const struct tsocket_address *remote_address,
 308                               const uint8 chal[8],
 309                               DATA_BLOB plaintext_password)
 310 {
 311
 312         DATA_BLOB local_lm_blob;
 313         DATA_BLOB local_nt_blob;
 314         NTSTATUS ret = NT_STATUS_UNSUCCESSFUL;
 315         char *plaintext_password_string;
 316         /*
 317          * Not encrypted - do so.
 318          */
 319
 320         DEBUG(5,("make_user_info_for_reply: User passwords not in encrypted "
 321                  "format.\n"));
 322         if (plaintext_password.data && plaintext_password.length) {
 323                 unsigned char local_lm_response[24];
 324
 325 #ifdef DEBUG_PASSWORD
 326                 DEBUG(10,("Unencrypted password (len %d):\n",
 327                           (int)plaintext_password.length));
 328                 dump_data(100, plaintext_password.data,
 329                           plaintext_password.length);
 330 #endif
 331
 332                 SMBencrypt( (const char *)plaintext_password.data,
 333                             (const uchar*)chal, local_lm_response);
 334                 local_lm_blob = data_blob(local_lm_response, 24);
 335
 336                 /* We can't do an NT hash here, as the password needs to be
 337                    case insensitive */
 338                 local_nt_blob = data_blob_null;
 339         } else {
 340                 local_lm_blob = data_blob_null;
 341                 local_nt_blob = data_blob_null;
 342         }
 343
 344         plaintext_password_string = talloc_strndup(talloc_tos(),
 345                                                    (const char *)plaintext_password.data,
 346                                                    plaintext_password.length);
 347         if (!plaintext_password_string) {
 348                 return False;
 349         }
 350
 351         ret = make_user_info_map(
 352                 user_info, smb_name, client_domain,
 353                 get_remote_machine_name(),
 354                 remote_address,
 355                 local_lm_blob.data ? &local_lm_blob : NULL,
 356                 local_nt_blob.data ? &local_nt_blob : NULL,
 357                 NULL, NULL,
 358                 plaintext_password_string,
 359                 AUTH_PASSWORD_PLAIN);
 360
 361         if (plaintext_password_string) {
 362                 memset(plaintext_password_string, '\0', strlen(plaintext_password_string));
 363                 talloc_free(plaintext_password_string);
 364         }
 365
 366         data_blob_free(&local_lm_blob);
 367         return NT_STATUS_IS_OK(ret) ? True : False;
 368 }
 369
 370 /****************************************************************************
 371  Create an auth_usersupplied_data structure
 372 ****************************************************************************/
 373
 374 NTSTATUS make_user_info_for_reply_enc(struct auth_usersupplied_info **user_info,
 375                                       const char *smb_name,
 376                                       const char *client_domain,
 377                                       const struct tsocket_address *remote_address,
 378                                       DATA_BLOB lm_resp, DATA_BLOB nt_resp)
 379 {
 380         return make_user_info_map(user_info, smb_name,
 381                                   client_domain,
 382                                   get_remote_machine_name(),
 383                                   remote_address,
 384                                   lm_resp.data && (lm_resp.length > 0) ? &lm_resp : NULL,
 385                                   nt_resp.data && (nt_resp.length > 0) ? &nt_resp : NULL,
 386                                   NULL, NULL, NULL,
 387                                   AUTH_PASSWORD_RESPONSE);
 388 }
 389
 390 /****************************************************************************
 391  Create a guest user_info blob, for anonymous authenticaion.
 392 ****************************************************************************/
 393
 394 bool make_user_info_guest(const struct tsocket_address *remote_address,
 395                           struct auth_usersupplied_info **user_info)
 396 {
 397         NTSTATUS nt_status;
 398
 399         nt_status = make_user_info(user_info,
 400                                    "","",
 401                                    "","",
 402                                    "",
 403                                    remote_address,
 404                                    NULL, NULL,
 405                                    NULL, NULL,
 406                                    NULL,
 407                                    AUTH_PASSWORD_RESPONSE);
 408
 409         return NT_STATUS_IS_OK(nt_status) ? True : False;
 410 }
 411
 412 static NTSTATUS log_nt_token(struct security_token *token)
 413 {
 414         TALLOC_CTX *frame = talloc_stackframe();
 415         char *command;
 416         char *group_sidstr;
 417         size_t i;
 418
 419         if ((lp_log_nt_token_command() == NULL) ||
 420             (strlen(lp_log_nt_token_command()) == 0)) {
 421                 TALLOC_FREE(frame);
 422                 return NT_STATUS_OK;
 423         }
 424
 425         group_sidstr = talloc_strdup(frame, "");
 426         for (i=1; i<token->num_sids; i++) {
 427                 group_sidstr = talloc_asprintf(
 428                         frame, "%s %s", group_sidstr,
 429                         sid_string_talloc(frame, &token->sids[i]));
 430         }
 431
 432         command = talloc_string_sub(
 433                 frame, lp_log_nt_token_command(),
 434                 "%s", sid_string_talloc(frame, &token->sids[0]));
 435         command = talloc_string_sub(frame, command, "%t", group_sidstr);
 436
 437         if (command == NULL) {
 438                 TALLOC_FREE(frame);
 439                 return NT_STATUS_NO_MEMORY;
 440         }
 441
 442         DEBUG(8, ("running command: [%s]\n", command));
 443         if (smbrun(command, NULL) != 0) {
 444                 DEBUG(0, ("Could not log NT token\n"));
 445                 TALLOC_FREE(frame);
 446                 return NT_STATUS_ACCESS_DENIED;
 447         }
 448
 449         TALLOC_FREE(frame);
 450         return NT_STATUS_OK;
 451 }
 452
 453 /*
 454  * Create the token to use from server_info->info3 and
 455  * server_info->sids (the info3/sam groups). Find the unix gids.
 456  */
 457
 458 NTSTATUS create_local_token(TALLOC_CTX *mem_ctx,
 459                             const struct auth_serversupplied_info *server_info,
 460                             DATA_BLOB *session_key,
 461                             struct auth3_session_info **session_info_out)
 462 {
 463         struct security_token *t;
 464         NTSTATUS status;
 465         size_t i;
 466         struct dom_sid tmp_sid;
 467         struct auth3_session_info *session_info;
 468         struct wbcUnixId *ids;
 469
 470         /* Ensure we can't possible take a code path leading to a
 471          * null defref. */
 472         if (!server_info) {
 473                 return NT_STATUS_LOGON_FAILURE;
 474         }
 475
 476         session_info = copy_serverinfo_session_info(mem_ctx, server_info);
 477
 478         if (!session_info) {
 479                 return NT_STATUS_NO_MEMORY;
 480         }
 481
 482         if (session_key) {
 483                 data_blob_free(&session_info->session_key);
 484                 session_info->session_key = data_blob_talloc(session_info,
 485                                                                   session_key->data,
 486                                                                   session_key->length);
 487                 if (!session_info->session_key.data && session_key->length) {
 488                         return NT_STATUS_NO_MEMORY;
 489                 }
 490         }
 491
 492         if (session_info->security_token) {
 493                 /* Just copy the token, it has already been finalised
 494                  * (nasty hack to support a cached guest session_info,
 495                  * and a possible strategy for auth_samba4 to pass in
 496                  * a finalised session) */
 497                 *session_info_out = session_info;
 498                 return NT_STATUS_OK;
 499         }
 500
 501         /*
 502          * If winbind is not around, we can not make much use of the SIDs the
 503          * domain controller provided us with. Likewise if the user name was
 504          * mapped to some local unix user.
 505          */
 506
 507         if (((lp_server_role() == ROLE_DOMAIN_MEMBER) && !winbind_ping()) ||
 508             (server_info->nss_token)) {
 509                 status = create_token_from_username(session_info,
 510                                                     server_info->unix_name,
 511                                                     server_info->guest,
 512                                                     &session_info->unix_token->uid,
 513                                                     &session_info->unix_token->gid,
 514                                                     &session_info->unix_info->unix_name,
 515                                                     &session_info->security_token);
 516
 517         } else {
 518                 status = create_local_nt_token_from_info3(session_info,
 519                                                           server_info->guest,
 520                                                           server_info->info3,
 521                                                           &server_info->extra,
 522                                                           &session_info->security_token);
 523         }
 524
 525         if (!NT_STATUS_IS_OK(status)) {
 526                 return status;
 527         }
 528
 529         /* Convert the SIDs to gids. */
 530
 531         session_info->unix_token->ngroups = 0;
 532         session_info->unix_token->groups = NULL;
 533
 534         t = session_info->security_token;
 535
 536         ids = talloc_array(talloc_tos(), struct wbcUnixId,
 537                            t->num_sids);
 538         if (ids == NULL) {
 539                 return NT_STATUS_NO_MEMORY;
 540         }
 541
 542         if (!sids_to_unix_ids(t->sids, t->num_sids, ids)) {
 543                 TALLOC_FREE(ids);
 544                 return NT_STATUS_NO_MEMORY;
 545         }
 546
 547         /* Start at index 1, where the groups start. */
 548
 549         for (i=1; i<t->num_sids; i++) {
 550
 551                 if (ids[i].type != WBC_ID_TYPE_GID) {
 552                         DEBUG(10, ("Could not convert SID %s to gid, "
 553                                    "ignoring it\n",
 554                                    sid_string_dbg(&t->sids[i])));
 555                         continue;
 556                 }
 557                 if (!add_gid_to_array_unique(session_info, ids[i].id.gid,
 558                                              &session_info->unix_token->groups,
 559                                              &session_info->unix_token->ngroups)) {
 560                         return NT_STATUS_NO_MEMORY;
 561                 }
 562         }
 563
 564         /*
 565          * Add the "Unix Group" SID for each gid to catch mapped groups
 566          * and their Unix equivalent.  This is to solve the backwards
 567          * compatibility problem of 'valid users = +ntadmin' where
 568          * ntadmin has been paired with "Domain Admins" in the group
 569          * mapping table.  Otherwise smb.conf would need to be changed
 570          * to 'valid user = "Domain Admins"'.  --jerry
 571          *
 572          * For consistency we also add the "Unix User" SID,
 573          * so that the complete unix token is represented within
 574          * the nt token.
 575          */
 576
 577         uid_to_unix_users_sid(session_info->unix_token->uid, &tmp_sid);
 578
 579         add_sid_to_array_unique(session_info->security_token, &tmp_sid,
 580                                 &session_info->security_token->sids,
 581                                 &session_info->security_token->num_sids);
 582
 583         for ( i=0; i<session_info->unix_token->ngroups; i++ ) {
 584                 gid_to_unix_groups_sid(session_info->unix_token->groups[i], &tmp_sid);
 585                 add_sid_to_array_unique(session_info->security_token, &tmp_sid,
 586                                         &session_info->security_token->sids,
 587                                         &session_info->security_token->num_sids);
 588         }
 589
 590         security_token_debug(DBGC_AUTH, 10, session_info->security_token);
 591         debug_unix_user_token(DBGC_AUTH, 10,
 592                               session_info->unix_token->uid,
 593                               session_info->unix_token->gid,
 594                               session_info->unix_token->ngroups,
 595                               session_info->unix_token->groups);
 596
 597         status = log_nt_token(session_info->security_token);
 598         if (!NT_STATUS_IS_OK(status)) {
 599                 return status;
 600         }
 601
 602         *session_info_out = session_info;
 603         return NT_STATUS_OK;
 604 }
 605
 606 /***************************************************************************
 607  Make (and fill) a server_info struct from a 'struct passwd' by conversion
 608  to a struct samu
 609 ***************************************************************************/
 610
 611 NTSTATUS make_server_info_pw(struct auth_serversupplied_info **server_info,
 612                              char *unix_username,
 613                              struct passwd *pwd)
 614 {
 615         NTSTATUS status;
 616         struct samu *sampass = NULL;
 617         char *qualified_name = NULL;
 618         TALLOC_CTX *mem_ctx = NULL;
 619         struct dom_sid u_sid;
 620         enum lsa_SidType type;
 621         struct auth_serversupplied_info *result;
 622
 623         /*
 624          * The SID returned in server_info->sam_account is based
 625          * on our SAM sid even though for a pure UNIX account this should
 626          * not be the case as it doesn't really exist in the SAM db.
 627          * This causes lookups on "[in]valid users" to fail as they
 628          * will lookup this name as a "Unix User" SID to check against
 629          * the user token. Fix this by adding the "Unix User"\unix_username
 630          * SID to the sid array. The correct fix should probably be
 631          * changing the server_info->sam_account user SID to be a
 632          * S-1-22 Unix SID, but this might break old configs where
 633          * plaintext passwords were used with no SAM backend.
 634          */
 635
 636         mem_ctx = talloc_init("make_server_info_pw_tmp");
 637         if (!mem_ctx) {
 638                 return NT_STATUS_NO_MEMORY;
 639         }
 640
 641         qualified_name = talloc_asprintf(mem_ctx, "%s\\%s",
 642                                         unix_users_domain_name(),
 643                                         unix_username );
 644         if (!qualified_name) {
 645                 TALLOC_FREE(mem_ctx);
 646                 return NT_STATUS_NO_MEMORY;
 647         }
 648
 649         if (!lookup_name(mem_ctx, qualified_name, LOOKUP_NAME_ALL,
 650                                                 NULL, NULL,
 651                                                 &u_sid, &type)) {
 652                 TALLOC_FREE(mem_ctx);
 653                 return NT_STATUS_NO_SUCH_USER;
 654         }
 655
 656         TALLOC_FREE(mem_ctx);
 657
 658         if (type != SID_NAME_USER) {
 659                 return NT_STATUS_NO_SUCH_USER;
 660         }
 661
 662         if ( !(sampass = samu_new( NULL )) ) {
 663                 return NT_STATUS_NO_MEMORY;
 664         }
 665
 666         status = samu_set_unix( sampass, pwd );
 667         if (!NT_STATUS_IS_OK(status)) {
 668                 return status;
 669         }
 670
 671         /* In pathological cases the above call can set the account
 672          * name to the DOMAIN\username form. Reset the account name
 673          * using unix_username */
 674         pdb_set_username(sampass, unix_username, PDB_SET);
 675
 676         /* set the user sid to be the calculated u_sid */
 677         pdb_set_user_sid(sampass, &u_sid, PDB_SET);
 678
 679         result = make_server_info(NULL);
 680         if (result == NULL) {
 681                 TALLOC_FREE(sampass);
 682                 return NT_STATUS_NO_MEMORY;
 683         }
 684
 685         status = samu_to_SamInfo3(result, sampass, lp_netbios_name(),
 686                                   &result->info3, &result->extra);
 687         TALLOC_FREE(sampass);
 688         if (!NT_STATUS_IS_OK(status)) {
 689                 DEBUG(10, ("Failed to convert samu to info3: %s\n",
 690                            nt_errstr(status)));
 691                 TALLOC_FREE(result);
 692                 return status;
 693         }
 694
 695         result->unix_name = talloc_strdup(result, unix_username);
 696         result->sanitized_username = sanitize_username(result, unix_username);
 697
 698         if ((result->unix_name == NULL)
 699             || (result->sanitized_username == NULL)) {
 700                 TALLOC_FREE(result);
 701                 return NT_STATUS_NO_MEMORY;
 702         }
 703
 704         result->utok.uid = pwd->pw_uid;
 705         result->utok.gid = pwd->pw_gid;
 706
 707         *server_info = result;
 708
 709         return NT_STATUS_OK;
 710 }
 711
 712 static NTSTATUS get_guest_info3(TALLOC_CTX *mem_ctx,
 713                                 struct netr_SamInfo3 *info3)
 714 {
 715         const char *guest_account = lp_guestaccount();
 716         struct dom_sid domain_sid;
 717         struct passwd *pwd;
 718         const char *tmp;
 719
 720         pwd = Get_Pwnam_alloc(mem_ctx, guest_account);
 721         if (pwd == NULL) {
 722                 DEBUG(0,("SamInfo3_for_guest: Unable to locate guest "
 723                          "account [%s]!\n", guest_account));
 724                 return NT_STATUS_NO_SUCH_USER;
 725         }
 726
 727         /* Set acount name */
 728         tmp = talloc_strdup(mem_ctx, pwd->pw_name);
 729         if (tmp == NULL) {
 730                 return NT_STATUS_NO_MEMORY;
 731         }
 732         init_lsa_String(&info3->base.account_name, tmp);
 733
 734         /* Set domain name */
 735         tmp = talloc_strdup(mem_ctx, get_global_sam_name());
 736         if (tmp == NULL) {
 737                 return NT_STATUS_NO_MEMORY;
 738         }
 739         init_lsa_StringLarge(&info3->base.domain, tmp);
 740
 741         /* Domain sid */
 742         sid_copy(&domain_sid, get_global_sam_sid());
 743
 744         info3->base.domain_sid = dom_sid_dup(mem_ctx, &domain_sid);
 745         if (info3->base.domain_sid == NULL) {
 746                 return NT_STATUS_NO_MEMORY;
 747         }
 748
 749         /* Guest rid */
 750         info3->base.rid = DOMAIN_RID_GUEST;
 751
 752         /* Primary gid */
 753         info3->base.primary_gid = BUILTIN_RID_GUESTS;
 754
 755         TALLOC_FREE(pwd);
 756         return NT_STATUS_OK;
 757 }
 758
 759 /***************************************************************************
 760  Make (and fill) a user_info struct for a guest login.
 761  This *must* succeed for smbd to start. If there is no mapping entry for
 762  the guest gid, then create one.
 763
 764  The resulting structure is a 'session_info' because
 765  create_local_token() has already been called on it.  This is quite
 766  nasty, as the auth subsystem isn't expect this, but the behaviour is
 767  left as-is for now.
 768 ***************************************************************************/
 769
 770 static NTSTATUS make_new_session_info_guest(struct auth3_session_info **session_info, struct auth_serversupplied_info **server_info)
 771 {
 772         static const char zeros[16] = {0};
 773         const char *guest_account = lp_guestaccount();
 774         const char *domain = lp_netbios_name();
 775         struct netr_SamInfo3 info3;
 776         TALLOC_CTX *tmp_ctx;
 777         NTSTATUS status;
 778         fstring tmp;
 779
 780         tmp_ctx = talloc_stackframe();
 781         if (tmp_ctx == NULL) {
 782                 return NT_STATUS_NO_MEMORY;
 783         }
 784
 785         ZERO_STRUCT(info3);
 786
 787         status = get_guest_info3(tmp_ctx, &info3);
 788         if (!NT_STATUS_IS_OK(status)) {
 789                 DEBUG(0, ("get_guest_info3 failed with %s\n",
 790                           nt_errstr(status)));
 791                 goto done;
 792         }
 793
 794         status = make_server_info_info3(tmp_ctx,
 795                                         guest_account,
 796                                         domain,
 797                                         server_info,
 798                                         &info3);
 799         if (!NT_STATUS_IS_OK(status)) {
 800                 DEBUG(0, ("make_server_info_info3 failed with %s\n",
 801                           nt_errstr(status)));
 802                 goto done;
 803         }
 804
 805         (*server_info)->guest = True;
 806
 807         /* This should not be done here (we should produce a server
 808          * info, and later construct a session info from it), but for
 809          * now this does not change the previous behaviours */
 810         status = create_local_token(tmp_ctx, *server_info, NULL, session_info);
 811         if (!NT_STATUS_IS_OK(status)) {
 812                 DEBUG(0, ("create_local_token failed: %s\n",
 813                           nt_errstr(status)));
 814                 goto done;
 815         }
 816         talloc_steal(NULL, *session_info);
 817         talloc_steal(NULL, *server_info);
 818
 819         /* annoying, but the Guest really does have a session key, and it is
 820            all zeros! */
 821         (*session_info)->session_key = data_blob(zeros, sizeof(zeros));
 822
 823         alpha_strcpy(tmp, (*session_info)->info3->base.account_name.string,
 824                      ". _-$", sizeof(tmp));
 825         (*session_info)->unix_info->sanitized_username = talloc_strdup(*session_info, tmp);
 826
 827         status = NT_STATUS_OK;
 828 done:
 829         TALLOC_FREE(tmp_ctx);
 830         return status;
 831 }
 832
 833 /***************************************************************************
 834  Make (and fill) a auth_session_info struct for a system user login.
 835  This *must* succeed for smbd to start.
 836 ***************************************************************************/
 837
 838 static NTSTATUS make_new_session_info_system(TALLOC_CTX *mem_ctx,
 839                                             struct auth3_session_info **session_info)
 840 {
 841         struct passwd *pwd;
 842         NTSTATUS status;
 843
 844         pwd = getpwuid_alloc(mem_ctx, sec_initial_uid());
 845         if (pwd == NULL) {
 846                 return NT_STATUS_NO_SUCH_USER;
 847         }
 848
 849         status = make_session_info_from_username(mem_ctx,
 850                                                  pwd->pw_name,
 851                                                  false,
 852                                                  session_info);
 853         TALLOC_FREE(pwd);
 854         if (!NT_STATUS_IS_OK(status)) {
 855                 return status;
 856         }
 857
 858         (*session_info)->unix_info->system = true;
 859
 860         status = add_sid_to_array_unique((*session_info)->security_token->sids,
 861                                          &global_sid_System,
 862                                          &(*session_info)->security_token->sids,
 863                                          &(*session_info)->security_token->num_sids);
 864         if (!NT_STATUS_IS_OK(status)) {
 865                 TALLOC_FREE((*session_info));
 866                 return status;
 867         }
 868
 869         return NT_STATUS_OK;
 870 }
 871
 872 /****************************************************************************
 873   Fake a auth3_session_info just from a username (as a
 874   session_info structure, with create_local_token() already called on
 875   it.
 876 ****************************************************************************/
 877
 878 NTSTATUS make_session_info_from_username(TALLOC_CTX *mem_ctx,
 879                                          const char *username,
 880                                          bool is_guest,
 881                                          struct auth3_session_info **session_info)
 882 {
 883         struct auth_serversupplied_info *result;
 884         struct passwd *pwd;
 885         NTSTATUS status;
 886
 887         pwd = Get_Pwnam_alloc(talloc_tos(), username);
 888         if (pwd == NULL) {
 889                 return NT_STATUS_NO_SUCH_USER;
 890         }
 891
 892         status = make_server_info_pw(&result, pwd->pw_name, pwd);
 893
 894         TALLOC_FREE(pwd);
 895
 896         if (!NT_STATUS_IS_OK(status)) {
 897                 return status;
 898         }
 899
 900         result->nss_token = true;
 901         result->guest = is_guest;
 902
 903         /* Now turn the server_info into a session_info with the full token etc */
 904         status = create_local_token(mem_ctx, result, NULL, session_info);
 905         talloc_free(result);
 906         return status;
 907 }
 908
 909 /* This function MUST only used to create the cached server_info for
 910  * guest.
 911  *
 912  * This is a lossy conversion.  Variables known to be lost so far
 913  * include:
 914  *
 915  * - nss_token (not needed because the only read doesn't happen
 916  * for the GUEST user, as this routine populates ->security_token
 917  *
 918  * - extra (not needed because the guest account mut have a valid RID per the output of get_guest_info3())
 919  *
 920  * - The 'server_info' parameter allows the missing 'info3' to be copied across.
 921  */
 922 static struct auth_serversupplied_info *copy_session_info_serverinfo_guest(TALLOC_CTX *mem_ctx,
 923                                                                            const struct auth3_session_info *src,
 924                                                                            struct auth_serversupplied_info *server_info)
 925 {
 926         struct auth_serversupplied_info *dst;
 927
 928         dst = make_server_info(mem_ctx);
 929         if (dst == NULL) {
 930                 return NULL;
 931         }
 932
 933         /* This element must be provided to convert back to an auth_serversupplied_info */
 934         SMB_ASSERT(src->unix_info);
 935
 936         dst->guest = src->unix_info->guest;
 937         dst->system = src->unix_info->system;
 938
 939         /* This element must be provided to convert back to an auth_serversupplied_info */
 940         SMB_ASSERT(src->unix_token);
 941         dst->utok.uid = src->unix_token->uid;
 942         dst->utok.gid = src->unix_token->gid;
 943         dst->utok.ngroups = src->unix_token->ngroups;
 944         if (src->unix_token->ngroups != 0) {
 945                 dst->utok.groups = (gid_t *)talloc_memdup(
 946                         dst, src->unix_token->groups,
 947                         sizeof(gid_t)*dst->utok.ngroups);
 948         } else {
 949                 dst->utok.groups = NULL;
 950         }
 951
 952         /* We must have a security_token as otherwise the lossy
 953          * conversion without nss_token would cause create_local_token
 954          * to take the wrong path */
 955         SMB_ASSERT(src->security_token);
 956
 957         dst->security_token = dup_nt_token(dst, src->security_token);
 958         if (!dst->security_token) {
 959                 TALLOC_FREE(dst);
 960                 return NULL;
 961         }
 962
 963         dst->session_key = data_blob_talloc( dst, src->session_key.data,
 964                                                 src->session_key.length);
 965
 966         /* This is OK because this functions is only used for the
 967          * GUEST account, which has all-zero keys for both values */
 968         dst->lm_session_key = data_blob_talloc(dst, src->session_key.data,
 969                                                 src->session_key.length);
 970
 971         dst->info3 = copy_netr_SamInfo3(dst, server_info->info3);
 972         if (!dst->info3) {
 973                 TALLOC_FREE(dst);
 974                 return NULL;
 975         }
 976
 977         dst->unix_name = talloc_strdup(dst, src->unix_info->unix_name);
 978         if (!dst->unix_name) {
 979                 TALLOC_FREE(dst);
 980                 return NULL;
 981         }
 982
 983         dst->sanitized_username = talloc_strdup(dst, src->unix_info->sanitized_username);
 984         if (!dst->sanitized_username) {
 985                 TALLOC_FREE(dst);
 986                 return NULL;
 987         }
 988
 989         return dst;
 990 }
 991
 992 static struct auth3_session_info *copy_serverinfo_session_info(TALLOC_CTX *mem_ctx,
 993                                                         const struct auth_serversupplied_info *src)
 994 {
 995         struct auth3_session_info *dst;
 996
 997         dst = make_auth3_session_info(mem_ctx);
 998         if (dst == NULL) {
 999                 return NULL;
1000         }
1001
1002         dst->unix_token = talloc(dst, struct security_unix_token);
1003         if (!dst->unix_token) {
1004                 return NULL;
1005         }
1006
1007         dst->unix_token->uid = src->utok.uid;
1008         dst->unix_token->gid = src->utok.gid;
1009         dst->unix_token->ngroups = src->utok.ngroups;
1010         if (src->utok.ngroups != 0) {
1011                 dst->unix_token->groups = (gid_t *)talloc_memdup(
1012                         dst->unix_token, src->utok.groups,
1013                         sizeof(gid_t)*dst->unix_token->ngroups);
1014         } else {
1015                 dst->unix_token->groups = NULL;
1016         }
1017
1018         if (src->security_token) {
1019                 dst->security_token = dup_nt_token(dst, src->security_token);
1020                 if (!dst->security_token) {
1021                         TALLOC_FREE(dst);
1022                         return NULL;
1023                 }
1024         }
1025
1026         dst->session_key = data_blob_talloc( dst, src->session_key.data,
1027                                                 src->session_key.length);
1028
1029         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
1030         if (!dst->info3) {
1031                 TALLOC_FREE(dst);
1032                 return NULL;
1033         }
1034
1035         dst->unix_info = talloc_zero(dst, struct auth_user_info_unix);
1036         if (!dst->unix_info) {
1037                 TALLOC_FREE(dst);
1038                 return NULL;
1039         }
1040
1041         dst->unix_info->unix_name = talloc_strdup(dst, src->unix_name);
1042         if (!dst->unix_info->unix_name) {
1043                 TALLOC_FREE(dst);
1044                 return NULL;
1045         }
1046
1047         dst->unix_info->sanitized_username = talloc_strdup(dst, src->sanitized_username);
1048         if (!dst->unix_info->sanitized_username) {
1049                 TALLOC_FREE(dst);
1050                 return NULL;
1051         }
1052
1053         dst->unix_info->guest = src->guest;
1054         dst->unix_info->system = src->system;
1055
1056         return dst;
1057 }
1058
1059 struct auth3_session_info *copy_session_info(TALLOC_CTX *mem_ctx,
1060                                              const struct auth3_session_info *src)
1061 {
1062         struct auth3_session_info *dst;
1063
1064         dst = make_auth3_session_info(mem_ctx);
1065         if (dst == NULL) {
1066                 return NULL;
1067         }
1068
1069         if (src->unix_token) {
1070                 dst->unix_token = talloc(dst, struct security_unix_token);
1071                 if (!dst->unix_token) {
1072                         return NULL;
1073                 }
1074
1075                 dst->unix_token->uid = src->unix_token->uid;
1076                 dst->unix_token->gid = src->unix_token->gid;
1077                 dst->unix_token->ngroups = src->unix_token->ngroups;
1078                 if (src->unix_token->ngroups != 0) {
1079                         dst->unix_token->groups = (gid_t *)talloc_memdup(
1080                                 dst->unix_token, src->unix_token->groups,
1081                                 sizeof(gid_t)*dst->unix_token->ngroups);
1082                 } else {
1083                         dst->unix_token->groups = NULL;
1084                 }
1085         } else {
1086                 dst->unix_token = NULL;
1087         }
1088
1089         if (src->security_token) {
1090                 dst->security_token = dup_nt_token(dst, src->security_token);
1091                 if (!dst->security_token) {
1092                         TALLOC_FREE(dst);
1093                         return NULL;
1094                 }
1095         }
1096
1097         dst->session_key = data_blob_talloc( dst, src->session_key.data,
1098                                                 src->session_key.length);
1099
1100         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
1101         if (!dst->info3) {
1102                 TALLOC_FREE(dst);
1103                 return NULL;
1104         }
1105
1106         if (src->unix_info) {
1107                 dst->unix_info = talloc_zero(dst, struct auth_user_info_unix);
1108                 if (!dst->unix_info) {
1109                         TALLOC_FREE(dst);
1110                         return NULL;
1111                 }
1112
1113                 dst->unix_info->unix_name = talloc_strdup(dst, src->unix_info->unix_name);
1114                 if (!dst->unix_info->unix_name) {
1115                         TALLOC_FREE(dst);
1116                         return NULL;
1117                 }
1118
1119                 dst->unix_info->sanitized_username = talloc_strdup(dst, src->unix_info->sanitized_username);
1120                 if (!dst->unix_info->sanitized_username) {
1121                         TALLOC_FREE(dst);
1122                         return NULL;
1123                 }
1124
1125                 dst->unix_info->guest = src->unix_info->guest;
1126                 dst->unix_info->system = src->unix_info->system;
1127         }
1128
1129         return dst;
1130 }
1131
1132 /*
1133  * Set a new session key. Used in the rpc server where we have to override the
1134  * SMB level session key with SystemLibraryDTC
1135  */
1136
1137 bool session_info_set_session_key(struct auth3_session_info *info,
1138                                  DATA_BLOB session_key)
1139 {
1140         TALLOC_FREE(info->session_key.data);
1141
1142         info->session_key = data_blob_talloc(
1143                 info, session_key.data, session_key.length);
1144
1145         return (info->session_key.data != NULL);
1146 }
1147
1148 static struct auth3_session_info *guest_info = NULL;
1149
1150 static struct auth_serversupplied_info *guest_server_info = NULL;
1151
1152 bool init_guest_info(void)
1153 {
1154         if (guest_info != NULL)
1155                 return True;
1156
1157         return NT_STATUS_IS_OK(make_new_session_info_guest(&guest_info, &guest_server_info));
1158 }
1159
1160 NTSTATUS make_server_info_guest(TALLOC_CTX *mem_ctx,
1161                                 struct auth_serversupplied_info **server_info)
1162 {
1163         /* This is trickier than it would appear to need to be because
1164          * we are trying to avoid certain costly operations when the
1165          * structure is converted to a 'auth3_session_info' again in
1166          * create_local_token() */
1167         *server_info = copy_session_info_serverinfo_guest(mem_ctx, guest_info, guest_server_info);
1168         return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1169 }
1170
1171 NTSTATUS make_session_info_guest(TALLOC_CTX *mem_ctx,
1172                                 struct auth3_session_info **session_info)
1173 {
1174         *session_info = copy_session_info(mem_ctx, guest_info);
1175         return (*session_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1176 }
1177
1178 static struct auth3_session_info *system_info = NULL;
1179
1180 NTSTATUS init_system_info(void)
1181 {
1182         if (system_info != NULL)
1183                 return NT_STATUS_OK;
1184
1185         return make_new_session_info_system(NULL, &system_info);
1186 }
1187
1188 NTSTATUS make_session_info_system(TALLOC_CTX *mem_ctx,
1189                                 struct auth3_session_info **session_info)
1190 {
1191         if (system_info == NULL) return NT_STATUS_UNSUCCESSFUL;
1192         *session_info = copy_session_info(mem_ctx, system_info);
1193         return (*session_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1194 }
1195
1196 const struct auth3_session_info *get_session_info_system(void)
1197 {
1198     return system_info;
1199 }
1200
1201 bool copy_current_user(struct current_user *dst, struct current_user *src)
1202 {
1203         gid_t *groups;
1204         struct security_token *nt_token;
1205
1206         groups = (gid_t *)memdup(src->ut.groups,
1207                                  sizeof(gid_t) * src->ut.ngroups);
1208         if ((src->ut.ngroups != 0) && (groups == NULL)) {
1209                 return False;
1210         }
1211
1212         nt_token = dup_nt_token(NULL, src->nt_user_token);
1213         if (nt_token == NULL) {
1214                 SAFE_FREE(groups);
1215                 return False;
1216         }
1217
1218         dst->conn = src->conn;
1219         dst->vuid = src->vuid;
1220         dst->ut.uid = src->ut.uid;
1221         dst->ut.gid = src->ut.gid;
1222         dst->ut.ngroups = src->ut.ngroups;
1223         dst->ut.groups = groups;
1224         dst->nt_user_token = nt_token;
1225         return True;
1226 }
1227
1228 /***************************************************************************
1229  Purely internal function for make_server_info_info3
1230 ***************************************************************************/
1231
1232 static NTSTATUS check_account(TALLOC_CTX *mem_ctx, const char *domain,
1233                               const char *username, char **found_username,
1234                               struct passwd **pwd,
1235                               bool *username_was_mapped)
1236 {
1237         char *orig_dom_user = NULL;
1238         char *dom_user = NULL;
1239         char *lower_username = NULL;
1240         char *real_username = NULL;
1241         struct passwd *passwd;
1242
1243         lower_username = talloc_strdup(mem_ctx, username);
1244         if (!lower_username) {
1245                 return NT_STATUS_NO_MEMORY;
1246         }
1247         strlower_m( lower_username );
1248
1249         orig_dom_user = talloc_asprintf(mem_ctx,
1250                                 "%s%c%s",
1251                                 domain,
1252                                 *lp_winbind_separator(),
1253                                 lower_username);
1254         if (!orig_dom_user) {
1255                 return NT_STATUS_NO_MEMORY;
1256         }
1257
1258         /* Get the passwd struct.  Try to create the account if necessary. */
1259
1260         *username_was_mapped = map_username(mem_ctx, orig_dom_user, &dom_user);
1261         if (!dom_user) {
1262                 return NT_STATUS_NO_MEMORY;
1263         }
1264
1265         passwd = smb_getpwnam(mem_ctx, dom_user, &real_username, True );
1266         if (!passwd) {
1267                 DEBUG(3, ("Failed to find authenticated user %s via "
1268                           "getpwnam(), denying access.\n", dom_user));
1269                 return NT_STATUS_NO_SUCH_USER;
1270         }
1271
1272         if (!real_username) {
1273                 return NT_STATUS_NO_MEMORY;
1274         }
1275
1276         *pwd = passwd;
1277
1278         /* This is pointless -- there is no suport for differing
1279            unix and windows names.  Make sure to always store the
1280            one we actually looked up and succeeded. Have I mentioned
1281            why I hate the 'winbind use default domain' parameter?
1282                                          --jerry              */
1283
1284         *found_username = talloc_strdup( mem_ctx, real_username );
1285
1286         return NT_STATUS_OK;
1287 }
1288
1289 /****************************************************************************
1290  Wrapper to allow the getpwnam() call to strip the domain name and
1291  try again in case a local UNIX user is already there.  Also run through
1292  the username if we fallback to the username only.
1293  ****************************************************************************/
1294
1295 struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, const char *domuser,
1296                              char **p_save_username, bool create )
1297 {
1298         struct passwd *pw = NULL;
1299         char *p = NULL;
1300         char *username = NULL;
1301
1302         /* we only save a copy of the username it has been mangled
1303            by winbindd use default domain */
1304         *p_save_username = NULL;
1305
1306         /* don't call map_username() here since it has to be done higher
1307            up the stack so we don't call it multiple times */
1308
1309         username = talloc_strdup(mem_ctx, domuser);
1310         if (!username) {
1311                 return NULL;
1312         }
1313
1314         p = strchr_m( username, *lp_winbind_separator() );
1315
1316         /* code for a DOMAIN\user string */
1317
1318         if ( p ) {
1319                 pw = Get_Pwnam_alloc( mem_ctx, domuser );
1320                 if ( pw ) {
1321                         /* make sure we get the case of the username correct */
1322                         /* work around 'winbind use default domain = yes' */
1323
1324                         if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1325                                 char *domain;
1326
1327                                 /* split the domain and username into 2 strings */
1328                                 *p = '\0';
1329                                 domain = username;
1330
1331                                 *p_save_username = talloc_asprintf(mem_ctx,
1332                                                                 "%s%c%s",
1333                                                                 domain,
1334                                                                 *lp_winbind_separator(),
1335                                                                 pw->pw_name);
1336                                 if (!*p_save_username) {
1337                                         TALLOC_FREE(pw);
1338                                         return NULL;
1339                                 }
1340                         } else {
1341                                 *p_save_username = talloc_strdup(mem_ctx, pw->pw_name);
1342                         }
1343
1344                         /* whew -- done! */
1345                         return pw;
1346                 }
1347
1348                 /* setup for lookup of just the username */
1349                 /* remember that p and username are overlapping memory */
1350
1351                 p++;
1352                 username = talloc_strdup(mem_ctx, p);
1353                 if (!username) {
1354                         return NULL;
1355                 }
1356         }
1357
1358         /* just lookup a plain username */
1359
1360         pw = Get_Pwnam_alloc(mem_ctx, username);
1361
1362         /* Create local user if requested but only if winbindd
1363            is not running.  We need to protect against cases
1364            where winbindd is failing and then prematurely
1365            creating users in /etc/passwd */
1366
1367         if ( !pw && create && !winbind_ping() ) {
1368                 /* Don't add a machine account. */
1369                 if (username[strlen(username)-1] == '$')
1370                         return NULL;
1371
1372                 _smb_create_user(NULL, username, NULL);
1373                 pw = Get_Pwnam_alloc(mem_ctx, username);
1374         }
1375
1376         /* one last check for a valid passwd struct */
1377
1378         if (pw) {
1379                 *p_save_username = talloc_strdup(mem_ctx, pw->pw_name);
1380         }
1381         return pw;
1382 }
1383
1384 /***************************************************************************
1385  Make a server_info struct from the info3 returned by a domain logon
1386 ***************************************************************************/
1387
1388 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1389                                 const char *sent_nt_username,
1390                                 const char *domain,
1391                                 struct auth_serversupplied_info **server_info,
1392                                 struct netr_SamInfo3 *info3)
1393 {
1394         static const char zeros[16] = {0, };
1395
1396         NTSTATUS nt_status = NT_STATUS_OK;
1397         char *found_username = NULL;
1398         const char *nt_domain;
1399         const char *nt_username;
1400         bool username_was_mapped;
1401         struct passwd *pwd;
1402         struct auth_serversupplied_info *result;
1403         struct dom_sid *group_sid;
1404         struct netr_SamInfo3 *i3;
1405
1406         /*
1407            Here is where we should check the list of
1408            trusted domains, and verify that the SID
1409            matches.
1410         */
1411
1412         nt_username = talloc_strdup(mem_ctx, info3->base.account_name.string);
1413         if (!nt_username) {
1414                 /* If the server didn't give us one, just use the one we sent
1415                  * them */
1416                 nt_username = sent_nt_username;
1417         }
1418
1419         nt_domain = talloc_strdup(mem_ctx, info3->base.domain.string);
1420         if (!nt_domain) {
1421                 /* If the server didn't give us one, just use the one we sent
1422                  * them */
1423                 nt_domain = domain;
1424         }
1425
1426         /* If getpwnam() fails try the add user script (2.2.x behavior).
1427
1428            We use the _unmapped_ username here in an attempt to provide
1429            consistent username mapping behavior between kerberos and NTLM[SSP]
1430            authentication in domain mode security.  I.E. Username mapping
1431            should be applied to the fully qualified username
1432            (e.g. DOMAIN\user) and not just the login name.  Yes this means we
1433            called map_username() unnecessarily in make_user_info_map() but
1434            that is how the current code is designed.  Making the change here
1435            is the least disruptive place.  -- jerry */
1436
1437         /* this call will try to create the user if necessary */
1438
1439         nt_status = check_account(mem_ctx, nt_domain, sent_nt_username,
1440                                      &found_username, &pwd,
1441                                      &username_was_mapped);
1442
1443         if (!NT_STATUS_IS_OK(nt_status)) {
1444                 return nt_status;
1445         }
1446
1447         result = make_server_info(NULL);
1448         if (result == NULL) {
1449                 DEBUG(4, ("make_server_info failed!\n"));
1450                 return NT_STATUS_NO_MEMORY;
1451         }
1452
1453         result->unix_name = talloc_strdup(result, found_username);
1454
1455         result->sanitized_username = sanitize_username(result,
1456                                                        result->unix_name);
1457         if (result->sanitized_username == NULL) {
1458                 TALLOC_FREE(result);
1459                 return NT_STATUS_NO_MEMORY;
1460         }
1461
1462         /* copy in the info3 */
1463         result->info3 = i3 = copy_netr_SamInfo3(result, info3);
1464         if (result->info3 == NULL) {
1465                 TALLOC_FREE(result);
1466                 return NT_STATUS_NO_MEMORY;
1467         }
1468
1469         /* Fill in the unix info we found on the way */
1470         result->utok.uid = pwd->pw_uid;
1471         result->utok.gid = pwd->pw_gid;
1472
1473         /* We can't just trust that the primary group sid sent us is something
1474          * we can really use. Obtain the useable sid, and store the original
1475          * one as an additional group if it had to be replaced */
1476         nt_status = get_primary_group_sid(mem_ctx, found_username,
1477                                           &pwd, &group_sid);
1478         if (!NT_STATUS_IS_OK(nt_status)) {
1479                 TALLOC_FREE(result);
1480                 return nt_status;
1481         }
1482
1483         /* store and check if it is the same we got originally */
1484         sid_peek_rid(group_sid, &i3->base.primary_gid);
1485         if (i3->base.primary_gid != info3->base.primary_gid) {
1486                 uint32_t n = i3->base.groups.count;
1487                 /* not the same, store the original as an additional group */
1488                 i3->base.groups.rids =
1489                         talloc_realloc(i3, i3->base.groups.rids,
1490                                         struct samr_RidWithAttribute, n + 1);
1491                 if (i3->base.groups.rids == NULL) {
1492                         TALLOC_FREE(result);
1493                         return NT_STATUS_NO_MEMORY;
1494                 }
1495                 i3->base.groups.rids[n].rid = info3->base.primary_gid;
1496                 i3->base.groups.rids[n].attributes = SE_GROUP_ENABLED;
1497                 i3->base.groups.count = n + 1;
1498         }
1499
1500         /* ensure we are never given NULL session keys */
1501
1502         if (memcmp(info3->base.key.key, zeros, sizeof(zeros)) == 0) {
1503                 result->session_key = data_blob_null;
1504         } else {
1505                 result->session_key = data_blob_talloc(
1506                         result, info3->base.key.key,
1507                         sizeof(info3->base.key.key));
1508         }
1509
1510         if (memcmp(info3->base.LMSessKey.key, zeros, 8) == 0) {
1511                 result->lm_session_key = data_blob_null;
1512         } else {
1513                 result->lm_session_key = data_blob_talloc(
1514                         result, info3->base.LMSessKey.key,
1515                         sizeof(info3->base.LMSessKey.key));
1516         }
1517
1518         result->nss_token |= username_was_mapped;
1519
1520         result->guest = (info3->base.user_flags & NETLOGON_GUEST);
1521
1522         *server_info = result;
1523
1524         return NT_STATUS_OK;
1525 }
1526
1527 /*****************************************************************************
1528  Make a server_info struct from the wbcAuthUserInfo returned by a domain logon
1529 ******************************************************************************/
1530
1531 NTSTATUS make_server_info_wbcAuthUserInfo(TALLOC_CTX *mem_ctx,
1532                                           const char *sent_nt_username,
1533                                           const char *domain,
1534                                           const struct wbcAuthUserInfo *info,
1535                                           struct auth_serversupplied_info **server_info)
1536 {
1537         struct netr_SamInfo3 *info3;
1538
1539         info3 = wbcAuthUserInfo_to_netr_SamInfo3(mem_ctx, info);
1540         if (!info3) {
1541                 return NT_STATUS_NO_MEMORY;
1542         }
1543
1544         return make_server_info_info3(mem_ctx,
1545                                       sent_nt_username, domain,
1546                                       server_info, info3);
1547 }
1548
1549 /**
1550  * Verify whether or not given domain is trusted.
1551  *
1552  * @param domain_name name of the domain to be verified
1553  * @return true if domain is one of the trusted ones or
1554  *         false if otherwise
1555  **/
1556
1557 bool is_trusted_domain(const char* dom_name)
1558 {
1559         struct dom_sid trustdom_sid;
1560         bool ret;
1561
1562         /* no trusted domains for a standalone server */
1563
1564         if ( lp_server_role() == ROLE_STANDALONE )
1565                 return False;
1566
1567         if (dom_name == NULL || dom_name[0] == '\0') {
1568                 return false;
1569         }
1570
1571         if (strequal(dom_name, get_global_sam_name())) {
1572                 return false;
1573         }
1574
1575         /* if we are a DC, then check for a direct trust relationships */
1576
1577         if ( IS_DC ) {
1578                 become_root();
1579                 DEBUG (5,("is_trusted_domain: Checking for domain trust with "
1580                           "[%s]\n", dom_name ));
1581                 ret = pdb_get_trusteddom_pw(dom_name, NULL, NULL, NULL);
1582                 unbecome_root();
1583                 if (ret)
1584                         return True;
1585         }
1586         else {
1587                 wbcErr result;
1588
1589                 /* If winbind is around, ask it */
1590
1591                 result = wb_is_trusted_domain(dom_name);
1592
1593                 if (result == WBC_ERR_SUCCESS) {
1594                         return True;
1595                 }
1596
1597                 if (result == WBC_ERR_DOMAIN_NOT_FOUND) {
1598                         /* winbind could not find the domain */
1599                         return False;
1600                 }
1601
1602                 /* The only other possible result is that winbind is not up
1603                    and running. We need to update the trustdom_cache
1604                    ourselves */
1605
1606                 update_trustdom_cache();
1607         }
1608
1609         /* now the trustdom cache should be available a DC could still
1610          * have a transitive trust so fall back to the cache of trusted
1611          * domains (like a domain member would use  */
1612
1613         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
1614                 return True;
1615         }
1616
1617         return False;
1618 }
1619