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                                                     session_info->unix_info->unix_name,
 511                                                     session_info->unix_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                                                           session_info->unix_info->guest,
 520                                                           session_info->info3,
 521                                                           &session_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)
 771 {
 772         struct auth_serversupplied_info *server_info;
 773         static const char zeros[16] = {0};
 774         const char *guest_account = lp_guestaccount();
 775         const char *domain = lp_netbios_name();
 776         struct netr_SamInfo3 info3;
 777         TALLOC_CTX *tmp_ctx;
 778         NTSTATUS status;
 779         fstring tmp;
 780
 781         tmp_ctx = talloc_stackframe();
 782         if (tmp_ctx == NULL) {
 783                 return NT_STATUS_NO_MEMORY;
 784         }
 785
 786         ZERO_STRUCT(info3);
 787
 788         status = get_guest_info3(tmp_ctx, &info3);
 789         if (!NT_STATUS_IS_OK(status)) {
 790                 DEBUG(0, ("get_guest_info3 failed with %s\n",
 791                           nt_errstr(status)));
 792                 goto done;
 793         }
 794
 795         status = make_server_info_info3(tmp_ctx,
 796                                         guest_account,
 797                                         domain,
 798                                         &server_info,
 799                                         &info3);
 800         if (!NT_STATUS_IS_OK(status)) {
 801                 DEBUG(0, ("make_server_info_info3 failed with %s\n",
 802                           nt_errstr(status)));
 803                 goto done;
 804         }
 805
 806         server_info->guest = True;
 807
 808         /* This should not be done here (we should produce a server
 809          * info, and later construct a session info from it), but for
 810          * now this does not change the previous behaviours */
 811         status = create_local_token(tmp_ctx, server_info, NULL, session_info);
 812         TALLOC_FREE(server_info);
 813         if (!NT_STATUS_IS_OK(status)) {
 814                 DEBUG(0, ("create_local_token failed: %s\n",
 815                           nt_errstr(status)));
 816                 goto done;
 817         }
 818         talloc_steal(NULL, *session_info);
 819
 820         /* annoying, but the Guest really does have a session key, and it is
 821            all zeros! */
 822         (*session_info)->session_key = data_blob(zeros, sizeof(zeros));
 823
 824         alpha_strcpy(tmp, (*session_info)->info3->base.account_name.string,
 825                      ". _-$", sizeof(tmp));
 826         (*session_info)->unix_info->sanitized_username = talloc_strdup(*session_info, tmp);
 827
 828         status = NT_STATUS_OK;
 829 done:
 830         TALLOC_FREE(tmp_ctx);
 831         return status;
 832 }
 833
 834 /***************************************************************************
 835  Make (and fill) a auth_session_info struct for a system user login.
 836  This *must* succeed for smbd to start.
 837 ***************************************************************************/
 838
 839 static NTSTATUS make_new_session_info_system(TALLOC_CTX *mem_ctx,
 840                                             struct auth3_session_info **session_info)
 841 {
 842         struct passwd *pwd;
 843         NTSTATUS status;
 844
 845         pwd = getpwuid_alloc(mem_ctx, sec_initial_uid());
 846         if (pwd == NULL) {
 847                 return NT_STATUS_NO_SUCH_USER;
 848         }
 849
 850         status = make_session_info_from_username(mem_ctx,
 851                                                  pwd->pw_name,
 852                                                  false,
 853                                                  session_info);
 854         TALLOC_FREE(pwd);
 855         if (!NT_STATUS_IS_OK(status)) {
 856                 return status;
 857         }
 858
 859         (*session_info)->unix_info->system = true;
 860
 861         status = add_sid_to_array_unique((*session_info)->security_token->sids,
 862                                          &global_sid_System,
 863                                          &(*session_info)->security_token->sids,
 864                                          &(*session_info)->security_token->num_sids);
 865         if (!NT_STATUS_IS_OK(status)) {
 866                 TALLOC_FREE((*session_info));
 867                 return status;
 868         }
 869
 870         return NT_STATUS_OK;
 871 }
 872
 873 /****************************************************************************
 874   Fake a auth3_session_info just from a username (as a
 875   session_info structure, with create_local_token() already called on
 876   it.
 877 ****************************************************************************/
 878
 879 NTSTATUS make_session_info_from_username(TALLOC_CTX *mem_ctx,
 880                                          const char *username,
 881                                          bool is_guest,
 882                                          struct auth3_session_info **session_info)
 883 {
 884         struct auth_serversupplied_info *result;
 885         struct passwd *pwd;
 886         NTSTATUS status;
 887
 888         pwd = Get_Pwnam_alloc(talloc_tos(), username);
 889         if (pwd == NULL) {
 890                 return NT_STATUS_NO_SUCH_USER;
 891         }
 892
 893         status = make_server_info_pw(&result, pwd->pw_name, pwd);
 894
 895         TALLOC_FREE(pwd);
 896
 897         if (!NT_STATUS_IS_OK(status)) {
 898                 return status;
 899         }
 900
 901         result->nss_token = true;
 902         result->guest = is_guest;
 903
 904         /* Now turn the server_info into a session_info with the full token etc */
 905         status = create_local_token(mem_ctx, result, NULL, session_info);
 906         talloc_free(result);
 907         return status;
 908 }
 909
 910 /* This function MUST only used to create the cached server_info for guest */
 911 static struct auth_serversupplied_info *copy_session_info_serverinfo(TALLOC_CTX *mem_ctx,
 912                                                               const struct auth3_session_info *src)
 913 {
 914         struct auth_serversupplied_info *dst;
 915
 916         dst = make_server_info(mem_ctx);
 917         if (dst == NULL) {
 918                 return NULL;
 919         }
 920
 921         /* This element must be provided to convert back to an auth_serversupplied_info */
 922         SMB_ASSERT(src->unix_info);
 923
 924         dst->guest = src->unix_info->guest;
 925         dst->system = src->unix_info->system;
 926
 927         /* This element must be provided to convert back to an auth_serversupplied_info */
 928         SMB_ASSERT(src->unix_token);
 929         dst->utok.uid = src->unix_token->uid;
 930         dst->utok.gid = src->unix_token->gid;
 931         dst->utok.ngroups = src->unix_token->ngroups;
 932         if (src->unix_token->ngroups != 0) {
 933                 dst->utok.groups = (gid_t *)talloc_memdup(
 934                         dst, src->unix_token->groups,
 935                         sizeof(gid_t)*dst->utok.ngroups);
 936         } else {
 937                 dst->utok.groups = NULL;
 938         }
 939
 940         if (src->security_token) {
 941                 dst->security_token = dup_nt_token(dst, src->security_token);
 942                 if (!dst->security_token) {
 943                         TALLOC_FREE(dst);
 944                         return NULL;
 945                 }
 946         }
 947
 948         dst->session_key = data_blob_talloc( dst, src->session_key.data,
 949                                                 src->session_key.length);
 950
 951         /* This is OK because this functions is only used for the
 952          * GUEST account, which has all-zero keys for both values */
 953         dst->lm_session_key = data_blob_talloc(dst, src->session_key.data,
 954                                                 src->session_key.length);
 955
 956         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
 957         if (!dst->info3) {
 958                 TALLOC_FREE(dst);
 959                 return NULL;
 960         }
 961         dst->extra = src->extra;
 962
 963         dst->unix_name = talloc_strdup(dst, src->unix_info->unix_name);
 964         if (!dst->unix_name) {
 965                 TALLOC_FREE(dst);
 966                 return NULL;
 967         }
 968
 969         dst->sanitized_username = talloc_strdup(dst, src->unix_info->sanitized_username);
 970         if (!dst->sanitized_username) {
 971                 TALLOC_FREE(dst);
 972                 return NULL;
 973         }
 974
 975         return dst;
 976 }
 977
 978 static struct auth3_session_info *copy_serverinfo_session_info(TALLOC_CTX *mem_ctx,
 979                                                         const struct auth_serversupplied_info *src)
 980 {
 981         struct auth3_session_info *dst;
 982
 983         dst = make_auth3_session_info(mem_ctx);
 984         if (dst == NULL) {
 985                 return NULL;
 986         }
 987
 988         dst->unix_token = talloc(dst, struct security_unix_token);
 989         if (!dst->unix_token) {
 990                 return NULL;
 991         }
 992
 993         dst->unix_token->uid = src->utok.uid;
 994         dst->unix_token->gid = src->utok.gid;
 995         dst->unix_token->ngroups = src->utok.ngroups;
 996         if (src->utok.ngroups != 0) {
 997                 dst->unix_token->groups = (gid_t *)talloc_memdup(
 998                         dst->unix_token, src->utok.groups,
 999                         sizeof(gid_t)*dst->unix_token->ngroups);
1000         } else {
1001                 dst->unix_token->groups = NULL;
1002         }
1003
1004         if (src->security_token) {
1005                 dst->security_token = dup_nt_token(dst, src->security_token);
1006                 if (!dst->security_token) {
1007                         TALLOC_FREE(dst);
1008                         return NULL;
1009                 }
1010         }
1011
1012         dst->session_key = data_blob_talloc( dst, src->session_key.data,
1013                                                 src->session_key.length);
1014
1015         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
1016         if (!dst->info3) {
1017                 TALLOC_FREE(dst);
1018                 return NULL;
1019         }
1020         dst->extra = src->extra;
1021
1022         dst->unix_info = talloc_zero(dst, struct auth_user_info_unix);
1023         if (!dst->unix_info) {
1024                 TALLOC_FREE(dst);
1025                 return NULL;
1026         }
1027
1028         dst->unix_info->unix_name = talloc_strdup(dst, src->unix_name);
1029         if (!dst->unix_info->unix_name) {
1030                 TALLOC_FREE(dst);
1031                 return NULL;
1032         }
1033
1034         dst->unix_info->sanitized_username = talloc_strdup(dst, src->sanitized_username);
1035         if (!dst->unix_info->sanitized_username) {
1036                 TALLOC_FREE(dst);
1037                 return NULL;
1038         }
1039
1040         dst->unix_info->guest = src->guest;
1041         dst->unix_info->system = src->system;
1042
1043         return dst;
1044 }
1045
1046 struct auth3_session_info *copy_session_info(TALLOC_CTX *mem_ctx,
1047                                              const struct auth3_session_info *src)
1048 {
1049         struct auth3_session_info *dst;
1050
1051         dst = make_auth3_session_info(mem_ctx);
1052         if (dst == NULL) {
1053                 return NULL;
1054         }
1055
1056         if (src->unix_token) {
1057                 dst->unix_token = talloc(dst, struct security_unix_token);
1058                 if (!dst->unix_token) {
1059                         return NULL;
1060                 }
1061
1062                 dst->unix_token->uid = src->unix_token->uid;
1063                 dst->unix_token->gid = src->unix_token->gid;
1064                 dst->unix_token->ngroups = src->unix_token->ngroups;
1065                 if (src->unix_token->ngroups != 0) {
1066                         dst->unix_token->groups = (gid_t *)talloc_memdup(
1067                                 dst->unix_token, src->unix_token->groups,
1068                                 sizeof(gid_t)*dst->unix_token->ngroups);
1069                 } else {
1070                         dst->unix_token->groups = NULL;
1071                 }
1072         } else {
1073                 dst->unix_token = NULL;
1074         }
1075
1076         if (src->security_token) {
1077                 dst->security_token = dup_nt_token(dst, src->security_token);
1078                 if (!dst->security_token) {
1079                         TALLOC_FREE(dst);
1080                         return NULL;
1081                 }
1082         }
1083
1084         dst->session_key = data_blob_talloc( dst, src->session_key.data,
1085                                                 src->session_key.length);
1086
1087         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
1088         if (!dst->info3) {
1089                 TALLOC_FREE(dst);
1090                 return NULL;
1091         }
1092         dst->extra = src->extra;
1093
1094         if (src->unix_info) {
1095                 dst->unix_info = talloc_zero(dst, struct auth_user_info_unix);
1096                 if (!dst->unix_info) {
1097                         TALLOC_FREE(dst);
1098                         return NULL;
1099                 }
1100
1101                 dst->unix_info->unix_name = talloc_strdup(dst, src->unix_info->unix_name);
1102                 if (!dst->unix_info->unix_name) {
1103                         TALLOC_FREE(dst);
1104                         return NULL;
1105                 }
1106
1107                 dst->unix_info->sanitized_username = talloc_strdup(dst, src->unix_info->sanitized_username);
1108                 if (!dst->unix_info->sanitized_username) {
1109                         TALLOC_FREE(dst);
1110                         return NULL;
1111                 }
1112
1113                 dst->unix_info->guest = src->unix_info->guest;
1114                 dst->unix_info->system = src->unix_info->system;
1115         }
1116
1117         return dst;
1118 }
1119
1120 /*
1121  * Set a new session key. Used in the rpc server where we have to override the
1122  * SMB level session key with SystemLibraryDTC
1123  */
1124
1125 bool session_info_set_session_key(struct auth3_session_info *info,
1126                                  DATA_BLOB session_key)
1127 {
1128         TALLOC_FREE(info->session_key.data);
1129
1130         info->session_key = data_blob_talloc(
1131                 info, session_key.data, session_key.length);
1132
1133         return (info->session_key.data != NULL);
1134 }
1135
1136 static struct auth3_session_info *guest_info = NULL;
1137
1138 bool init_guest_info(void)
1139 {
1140         if (guest_info != NULL)
1141                 return True;
1142
1143         return NT_STATUS_IS_OK(make_new_session_info_guest(&guest_info));
1144 }
1145
1146 NTSTATUS make_server_info_guest(TALLOC_CTX *mem_ctx,
1147                                 struct auth_serversupplied_info **server_info)
1148 {
1149         *server_info = copy_session_info_serverinfo(mem_ctx, guest_info);
1150         return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1151 }
1152
1153 NTSTATUS make_session_info_guest(TALLOC_CTX *mem_ctx,
1154                                 struct auth3_session_info **session_info)
1155 {
1156         *session_info = copy_session_info(mem_ctx, guest_info);
1157         return (*session_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1158 }
1159
1160 static struct auth3_session_info *system_info = NULL;
1161
1162 NTSTATUS init_system_info(void)
1163 {
1164         if (system_info != NULL)
1165                 return NT_STATUS_OK;
1166
1167         return make_new_session_info_system(NULL, &system_info);
1168 }
1169
1170 NTSTATUS make_session_info_system(TALLOC_CTX *mem_ctx,
1171                                 struct auth3_session_info **session_info)
1172 {
1173         if (system_info == NULL) return NT_STATUS_UNSUCCESSFUL;
1174         *session_info = copy_session_info(mem_ctx, system_info);
1175         return (*session_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1176 }
1177
1178 const struct auth3_session_info *get_session_info_system(void)
1179 {
1180     return system_info;
1181 }
1182
1183 bool copy_current_user(struct current_user *dst, struct current_user *src)
1184 {
1185         gid_t *groups;
1186         struct security_token *nt_token;
1187
1188         groups = (gid_t *)memdup(src->ut.groups,
1189                                  sizeof(gid_t) * src->ut.ngroups);
1190         if ((src->ut.ngroups != 0) && (groups == NULL)) {
1191                 return False;
1192         }
1193
1194         nt_token = dup_nt_token(NULL, src->nt_user_token);
1195         if (nt_token == NULL) {
1196                 SAFE_FREE(groups);
1197                 return False;
1198         }
1199
1200         dst->conn = src->conn;
1201         dst->vuid = src->vuid;
1202         dst->ut.uid = src->ut.uid;
1203         dst->ut.gid = src->ut.gid;
1204         dst->ut.ngroups = src->ut.ngroups;
1205         dst->ut.groups = groups;
1206         dst->nt_user_token = nt_token;
1207         return True;
1208 }
1209
1210 /***************************************************************************
1211  Purely internal function for make_server_info_info3
1212 ***************************************************************************/
1213
1214 static NTSTATUS check_account(TALLOC_CTX *mem_ctx, const char *domain,
1215                               const char *username, char **found_username,
1216                               struct passwd **pwd,
1217                               bool *username_was_mapped)
1218 {
1219         char *orig_dom_user = NULL;
1220         char *dom_user = NULL;
1221         char *lower_username = NULL;
1222         char *real_username = NULL;
1223         struct passwd *passwd;
1224
1225         lower_username = talloc_strdup(mem_ctx, username);
1226         if (!lower_username) {
1227                 return NT_STATUS_NO_MEMORY;
1228         }
1229         strlower_m( lower_username );
1230
1231         orig_dom_user = talloc_asprintf(mem_ctx,
1232                                 "%s%c%s",
1233                                 domain,
1234                                 *lp_winbind_separator(),
1235                                 lower_username);
1236         if (!orig_dom_user) {
1237                 return NT_STATUS_NO_MEMORY;
1238         }
1239
1240         /* Get the passwd struct.  Try to create the account if necessary. */
1241
1242         *username_was_mapped = map_username(mem_ctx, orig_dom_user, &dom_user);
1243         if (!dom_user) {
1244                 return NT_STATUS_NO_MEMORY;
1245         }
1246
1247         passwd = smb_getpwnam(mem_ctx, dom_user, &real_username, True );
1248         if (!passwd) {
1249                 DEBUG(3, ("Failed to find authenticated user %s via "
1250                           "getpwnam(), denying access.\n", dom_user));
1251                 return NT_STATUS_NO_SUCH_USER;
1252         }
1253
1254         if (!real_username) {
1255                 return NT_STATUS_NO_MEMORY;
1256         }
1257
1258         *pwd = passwd;
1259
1260         /* This is pointless -- there is no suport for differing
1261            unix and windows names.  Make sure to always store the
1262            one we actually looked up and succeeded. Have I mentioned
1263            why I hate the 'winbind use default domain' parameter?
1264                                          --jerry              */
1265
1266         *found_username = talloc_strdup( mem_ctx, real_username );
1267
1268         return NT_STATUS_OK;
1269 }
1270
1271 /****************************************************************************
1272  Wrapper to allow the getpwnam() call to strip the domain name and
1273  try again in case a local UNIX user is already there.  Also run through
1274  the username if we fallback to the username only.
1275  ****************************************************************************/
1276
1277 struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, const char *domuser,
1278                              char **p_save_username, bool create )
1279 {
1280         struct passwd *pw = NULL;
1281         char *p = NULL;
1282         char *username = NULL;
1283
1284         /* we only save a copy of the username it has been mangled
1285            by winbindd use default domain */
1286         *p_save_username = NULL;
1287
1288         /* don't call map_username() here since it has to be done higher
1289            up the stack so we don't call it multiple times */
1290
1291         username = talloc_strdup(mem_ctx, domuser);
1292         if (!username) {
1293                 return NULL;
1294         }
1295
1296         p = strchr_m( username, *lp_winbind_separator() );
1297
1298         /* code for a DOMAIN\user string */
1299
1300         if ( p ) {
1301                 pw = Get_Pwnam_alloc( mem_ctx, domuser );
1302                 if ( pw ) {
1303                         /* make sure we get the case of the username correct */
1304                         /* work around 'winbind use default domain = yes' */
1305
1306                         if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1307                                 char *domain;
1308
1309                                 /* split the domain and username into 2 strings */
1310                                 *p = '\0';
1311                                 domain = username;
1312
1313                                 *p_save_username = talloc_asprintf(mem_ctx,
1314                                                                 "%s%c%s",
1315                                                                 domain,
1316                                                                 *lp_winbind_separator(),
1317                                                                 pw->pw_name);
1318                                 if (!*p_save_username) {
1319                                         TALLOC_FREE(pw);
1320                                         return NULL;
1321                                 }
1322                         } else {
1323                                 *p_save_username = talloc_strdup(mem_ctx, pw->pw_name);
1324                         }
1325
1326                         /* whew -- done! */
1327                         return pw;
1328                 }
1329
1330                 /* setup for lookup of just the username */
1331                 /* remember that p and username are overlapping memory */
1332
1333                 p++;
1334                 username = talloc_strdup(mem_ctx, p);
1335                 if (!username) {
1336                         return NULL;
1337                 }
1338         }
1339
1340         /* just lookup a plain username */
1341
1342         pw = Get_Pwnam_alloc(mem_ctx, username);
1343
1344         /* Create local user if requested but only if winbindd
1345            is not running.  We need to protect against cases
1346            where winbindd is failing and then prematurely
1347            creating users in /etc/passwd */
1348
1349         if ( !pw && create && !winbind_ping() ) {
1350                 /* Don't add a machine account. */
1351                 if (username[strlen(username)-1] == '$')
1352                         return NULL;
1353
1354                 _smb_create_user(NULL, username, NULL);
1355                 pw = Get_Pwnam_alloc(mem_ctx, username);
1356         }
1357
1358         /* one last check for a valid passwd struct */
1359
1360         if (pw) {
1361                 *p_save_username = talloc_strdup(mem_ctx, pw->pw_name);
1362         }
1363         return pw;
1364 }
1365
1366 /***************************************************************************
1367  Make a server_info struct from the info3 returned by a domain logon
1368 ***************************************************************************/
1369
1370 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1371                                 const char *sent_nt_username,
1372                                 const char *domain,
1373                                 struct auth_serversupplied_info **server_info,
1374                                 struct netr_SamInfo3 *info3)
1375 {
1376         static const char zeros[16] = {0, };
1377
1378         NTSTATUS nt_status = NT_STATUS_OK;
1379         char *found_username = NULL;
1380         const char *nt_domain;
1381         const char *nt_username;
1382         bool username_was_mapped;
1383         struct passwd *pwd;
1384         struct auth_serversupplied_info *result;
1385         struct dom_sid *group_sid;
1386         struct netr_SamInfo3 *i3;
1387
1388         /*
1389            Here is where we should check the list of
1390            trusted domains, and verify that the SID
1391            matches.
1392         */
1393
1394         nt_username = talloc_strdup(mem_ctx, info3->base.account_name.string);
1395         if (!nt_username) {
1396                 /* If the server didn't give us one, just use the one we sent
1397                  * them */
1398                 nt_username = sent_nt_username;
1399         }
1400
1401         nt_domain = talloc_strdup(mem_ctx, info3->base.domain.string);
1402         if (!nt_domain) {
1403                 /* If the server didn't give us one, just use the one we sent
1404                  * them */
1405                 nt_domain = domain;
1406         }
1407
1408         /* If getpwnam() fails try the add user script (2.2.x behavior).
1409
1410            We use the _unmapped_ username here in an attempt to provide
1411            consistent username mapping behavior between kerberos and NTLM[SSP]
1412            authentication in domain mode security.  I.E. Username mapping
1413            should be applied to the fully qualified username
1414            (e.g. DOMAIN\user) and not just the login name.  Yes this means we
1415            called map_username() unnecessarily in make_user_info_map() but
1416            that is how the current code is designed.  Making the change here
1417            is the least disruptive place.  -- jerry */
1418
1419         /* this call will try to create the user if necessary */
1420
1421         nt_status = check_account(mem_ctx, nt_domain, sent_nt_username,
1422                                      &found_username, &pwd,
1423                                      &username_was_mapped);
1424
1425         if (!NT_STATUS_IS_OK(nt_status)) {
1426                 return nt_status;
1427         }
1428
1429         result = make_server_info(NULL);
1430         if (result == NULL) {
1431                 DEBUG(4, ("make_server_info failed!\n"));
1432                 return NT_STATUS_NO_MEMORY;
1433         }
1434
1435         result->unix_name = talloc_strdup(result, found_username);
1436
1437         result->sanitized_username = sanitize_username(result,
1438                                                        result->unix_name);
1439         if (result->sanitized_username == NULL) {
1440                 TALLOC_FREE(result);
1441                 return NT_STATUS_NO_MEMORY;
1442         }
1443
1444         /* copy in the info3 */
1445         result->info3 = i3 = copy_netr_SamInfo3(result, info3);
1446         if (result->info3 == NULL) {
1447                 TALLOC_FREE(result);
1448                 return NT_STATUS_NO_MEMORY;
1449         }
1450
1451         /* Fill in the unix info we found on the way */
1452         result->utok.uid = pwd->pw_uid;
1453         result->utok.gid = pwd->pw_gid;
1454
1455         /* We can't just trust that the primary group sid sent us is something
1456          * we can really use. Obtain the useable sid, and store the original
1457          * one as an additional group if it had to be replaced */
1458         nt_status = get_primary_group_sid(mem_ctx, found_username,
1459                                           &pwd, &group_sid);
1460         if (!NT_STATUS_IS_OK(nt_status)) {
1461                 TALLOC_FREE(result);
1462                 return nt_status;
1463         }
1464
1465         /* store and check if it is the same we got originally */
1466         sid_peek_rid(group_sid, &i3->base.primary_gid);
1467         if (i3->base.primary_gid != info3->base.primary_gid) {
1468                 uint32_t n = i3->base.groups.count;
1469                 /* not the same, store the original as an additional group */
1470                 i3->base.groups.rids =
1471                         talloc_realloc(i3, i3->base.groups.rids,
1472                                         struct samr_RidWithAttribute, n + 1);
1473                 if (i3->base.groups.rids == NULL) {
1474                         TALLOC_FREE(result);
1475                         return NT_STATUS_NO_MEMORY;
1476                 }
1477                 i3->base.groups.rids[n].rid = info3->base.primary_gid;
1478                 i3->base.groups.rids[n].attributes = SE_GROUP_ENABLED;
1479                 i3->base.groups.count = n + 1;
1480         }
1481
1482         /* ensure we are never given NULL session keys */
1483
1484         if (memcmp(info3->base.key.key, zeros, sizeof(zeros)) == 0) {
1485                 result->session_key = data_blob_null;
1486         } else {
1487                 result->session_key = data_blob_talloc(
1488                         result, info3->base.key.key,
1489                         sizeof(info3->base.key.key));
1490         }
1491
1492         if (memcmp(info3->base.LMSessKey.key, zeros, 8) == 0) {
1493                 result->lm_session_key = data_blob_null;
1494         } else {
1495                 result->lm_session_key = data_blob_talloc(
1496                         result, info3->base.LMSessKey.key,
1497                         sizeof(info3->base.LMSessKey.key));
1498         }
1499
1500         result->nss_token |= username_was_mapped;
1501
1502         result->guest = (info3->base.user_flags & NETLOGON_GUEST);
1503
1504         *server_info = result;
1505
1506         return NT_STATUS_OK;
1507 }
1508
1509 /*****************************************************************************
1510  Make a server_info struct from the wbcAuthUserInfo returned by a domain logon
1511 ******************************************************************************/
1512
1513 NTSTATUS make_server_info_wbcAuthUserInfo(TALLOC_CTX *mem_ctx,
1514                                           const char *sent_nt_username,
1515                                           const char *domain,
1516                                           const struct wbcAuthUserInfo *info,
1517                                           struct auth_serversupplied_info **server_info)
1518 {
1519         struct netr_SamInfo3 *info3;
1520
1521         info3 = wbcAuthUserInfo_to_netr_SamInfo3(mem_ctx, info);
1522         if (!info3) {
1523                 return NT_STATUS_NO_MEMORY;
1524         }
1525
1526         return make_server_info_info3(mem_ctx,
1527                                       sent_nt_username, domain,
1528                                       server_info, info3);
1529 }
1530
1531 /**
1532  * Verify whether or not given domain is trusted.
1533  *
1534  * @param domain_name name of the domain to be verified
1535  * @return true if domain is one of the trusted ones or
1536  *         false if otherwise
1537  **/
1538
1539 bool is_trusted_domain(const char* dom_name)
1540 {
1541         struct dom_sid trustdom_sid;
1542         bool ret;
1543
1544         /* no trusted domains for a standalone server */
1545
1546         if ( lp_server_role() == ROLE_STANDALONE )
1547                 return False;
1548
1549         if (dom_name == NULL || dom_name[0] == '\0') {
1550                 return false;
1551         }
1552
1553         if (strequal(dom_name, get_global_sam_name())) {
1554                 return false;
1555         }
1556
1557         /* if we are a DC, then check for a direct trust relationships */
1558
1559         if ( IS_DC ) {
1560                 become_root();
1561                 DEBUG (5,("is_trusted_domain: Checking for domain trust with "
1562                           "[%s]\n", dom_name ));
1563                 ret = pdb_get_trusteddom_pw(dom_name, NULL, NULL, NULL);
1564                 unbecome_root();
1565                 if (ret)
1566                         return True;
1567         }
1568         else {
1569                 wbcErr result;
1570
1571                 /* If winbind is around, ask it */
1572
1573                 result = wb_is_trusted_domain(dom_name);
1574
1575                 if (result == WBC_ERR_SUCCESS) {
1576                         return True;
1577                 }
1578
1579                 if (result == WBC_ERR_DOMAIN_NOT_FOUND) {
1580                         /* winbind could not find the domain */
1581                         return False;
1582                 }
1583
1584                 /* The only other possible result is that winbind is not up
1585                    and running. We need to update the trustdom_cache
1586                    ourselves */
1587
1588                 update_trustdom_cache();
1589         }
1590
1591         /* now the trustdom cache should be available a DC could still
1592          * have a transitive trust so fall back to the cache of trusted
1593          * domains (like a domain member would use  */
1594
1595         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
1596                 return True;
1597         }
1598
1599         return False;
1600 }
1601