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)
 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
 911  * guest.
 912  *
 913  * This is a lossy conversion.  Variables known to be lost so far
 914  * include: nss_token (not needed because the only read doesn't happen
 915  * for the GUEST user, as this routine populates ->security_token
 916  */
 917 static struct auth_serversupplied_info *copy_session_info_serverinfo(TALLOC_CTX *mem_ctx,
 918                                                               const struct auth3_session_info *src)
 919 {
 920         struct auth_serversupplied_info *dst;
 921
 922         dst = make_server_info(mem_ctx);
 923         if (dst == NULL) {
 924                 return NULL;
 925         }
 926
 927         /* This element must be provided to convert back to an auth_serversupplied_info */
 928         SMB_ASSERT(src->unix_info);
 929
 930         dst->guest = src->unix_info->guest;
 931         dst->system = src->unix_info->system;
 932
 933         /* This element must be provided to convert back to an auth_serversupplied_info */
 934         SMB_ASSERT(src->unix_token);
 935         dst->utok.uid = src->unix_token->uid;
 936         dst->utok.gid = src->unix_token->gid;
 937         dst->utok.ngroups = src->unix_token->ngroups;
 938         if (src->unix_token->ngroups != 0) {
 939                 dst->utok.groups = (gid_t *)talloc_memdup(
 940                         dst, src->unix_token->groups,
 941                         sizeof(gid_t)*dst->utok.ngroups);
 942         } else {
 943                 dst->utok.groups = NULL;
 944         }
 945
 946         /* We must have a security_token as otherwise the lossy
 947          * conversion without nss_token would cause create_local_token
 948          * to take the wrong path */
 949         SMB_ASSERT(src->security_token);
 950
 951         dst->security_token = dup_nt_token(dst, src->security_token);
 952         if (!dst->security_token) {
 953                 TALLOC_FREE(dst);
 954                 return NULL;
 955         }
 956
 957         dst->session_key = data_blob_talloc( dst, src->session_key.data,
 958                                                 src->session_key.length);
 959
 960         /* This is OK because this functions is only used for the
 961          * GUEST account, which has all-zero keys for both values */
 962         dst->lm_session_key = data_blob_talloc(dst, src->session_key.data,
 963                                                 src->session_key.length);
 964
 965         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
 966         if (!dst->info3) {
 967                 TALLOC_FREE(dst);
 968                 return NULL;
 969         }
 970         dst->extra = src->extra;
 971
 972         dst->unix_name = talloc_strdup(dst, src->unix_info->unix_name);
 973         if (!dst->unix_name) {
 974                 TALLOC_FREE(dst);
 975                 return NULL;
 976         }
 977
 978         dst->sanitized_username = talloc_strdup(dst, src->unix_info->sanitized_username);
 979         if (!dst->sanitized_username) {
 980                 TALLOC_FREE(dst);
 981                 return NULL;
 982         }
 983
 984         return dst;
 985 }
 986
 987 static struct auth3_session_info *copy_serverinfo_session_info(TALLOC_CTX *mem_ctx,
 988                                                         const struct auth_serversupplied_info *src)
 989 {
 990         struct auth3_session_info *dst;
 991
 992         dst = make_auth3_session_info(mem_ctx);
 993         if (dst == NULL) {
 994                 return NULL;
 995         }
 996
 997         dst->unix_token = talloc(dst, struct security_unix_token);
 998         if (!dst->unix_token) {
 999                 return NULL;
1000         }
1001
1002         dst->unix_token->uid = src->utok.uid;
1003         dst->unix_token->gid = src->utok.gid;
1004         dst->unix_token->ngroups = src->utok.ngroups;
1005         if (src->utok.ngroups != 0) {
1006                 dst->unix_token->groups = (gid_t *)talloc_memdup(
1007                         dst->unix_token, src->utok.groups,
1008                         sizeof(gid_t)*dst->unix_token->ngroups);
1009         } else {
1010                 dst->unix_token->groups = NULL;
1011         }
1012
1013         if (src->security_token) {
1014                 dst->security_token = dup_nt_token(dst, src->security_token);
1015                 if (!dst->security_token) {
1016                         TALLOC_FREE(dst);
1017                         return NULL;
1018                 }
1019         }
1020
1021         dst->session_key = data_blob_talloc( dst, src->session_key.data,
1022                                                 src->session_key.length);
1023
1024         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
1025         if (!dst->info3) {
1026                 TALLOC_FREE(dst);
1027                 return NULL;
1028         }
1029         dst->extra = src->extra;
1030
1031         dst->unix_info = talloc_zero(dst, struct auth_user_info_unix);
1032         if (!dst->unix_info) {
1033                 TALLOC_FREE(dst);
1034                 return NULL;
1035         }
1036
1037         dst->unix_info->unix_name = talloc_strdup(dst, src->unix_name);
1038         if (!dst->unix_info->unix_name) {
1039                 TALLOC_FREE(dst);
1040                 return NULL;
1041         }
1042
1043         dst->unix_info->sanitized_username = talloc_strdup(dst, src->sanitized_username);
1044         if (!dst->unix_info->sanitized_username) {
1045                 TALLOC_FREE(dst);
1046                 return NULL;
1047         }
1048
1049         dst->unix_info->guest = src->guest;
1050         dst->unix_info->system = src->system;
1051
1052         return dst;
1053 }
1054
1055 struct auth3_session_info *copy_session_info(TALLOC_CTX *mem_ctx,
1056                                              const struct auth3_session_info *src)
1057 {
1058         struct auth3_session_info *dst;
1059
1060         dst = make_auth3_session_info(mem_ctx);
1061         if (dst == NULL) {
1062                 return NULL;
1063         }
1064
1065         if (src->unix_token) {
1066                 dst->unix_token = talloc(dst, struct security_unix_token);
1067                 if (!dst->unix_token) {
1068                         return NULL;
1069                 }
1070
1071                 dst->unix_token->uid = src->unix_token->uid;
1072                 dst->unix_token->gid = src->unix_token->gid;
1073                 dst->unix_token->ngroups = src->unix_token->ngroups;
1074                 if (src->unix_token->ngroups != 0) {
1075                         dst->unix_token->groups = (gid_t *)talloc_memdup(
1076                                 dst->unix_token, src->unix_token->groups,
1077                                 sizeof(gid_t)*dst->unix_token->ngroups);
1078                 } else {
1079                         dst->unix_token->groups = NULL;
1080                 }
1081         } else {
1082                 dst->unix_token = NULL;
1083         }
1084
1085         if (src->security_token) {
1086                 dst->security_token = dup_nt_token(dst, src->security_token);
1087                 if (!dst->security_token) {
1088                         TALLOC_FREE(dst);
1089                         return NULL;
1090                 }
1091         }
1092
1093         dst->session_key = data_blob_talloc( dst, src->session_key.data,
1094                                                 src->session_key.length);
1095
1096         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
1097         if (!dst->info3) {
1098                 TALLOC_FREE(dst);
1099                 return NULL;
1100         }
1101         dst->extra = src->extra;
1102
1103         if (src->unix_info) {
1104                 dst->unix_info = talloc_zero(dst, struct auth_user_info_unix);
1105                 if (!dst->unix_info) {
1106                         TALLOC_FREE(dst);
1107                         return NULL;
1108                 }
1109
1110                 dst->unix_info->unix_name = talloc_strdup(dst, src->unix_info->unix_name);
1111                 if (!dst->unix_info->unix_name) {
1112                         TALLOC_FREE(dst);
1113                         return NULL;
1114                 }
1115
1116                 dst->unix_info->sanitized_username = talloc_strdup(dst, src->unix_info->sanitized_username);
1117                 if (!dst->unix_info->sanitized_username) {
1118                         TALLOC_FREE(dst);
1119                         return NULL;
1120                 }
1121
1122                 dst->unix_info->guest = src->unix_info->guest;
1123                 dst->unix_info->system = src->unix_info->system;
1124         }
1125
1126         return dst;
1127 }
1128
1129 /*
1130  * Set a new session key. Used in the rpc server where we have to override the
1131  * SMB level session key with SystemLibraryDTC
1132  */
1133
1134 bool session_info_set_session_key(struct auth3_session_info *info,
1135                                  DATA_BLOB session_key)
1136 {
1137         TALLOC_FREE(info->session_key.data);
1138
1139         info->session_key = data_blob_talloc(
1140                 info, session_key.data, session_key.length);
1141
1142         return (info->session_key.data != NULL);
1143 }
1144
1145 static struct auth3_session_info *guest_info = NULL;
1146
1147 bool init_guest_info(void)
1148 {
1149         if (guest_info != NULL)
1150                 return True;
1151
1152         return NT_STATUS_IS_OK(make_new_session_info_guest(&guest_info));
1153 }
1154
1155 NTSTATUS make_server_info_guest(TALLOC_CTX *mem_ctx,
1156                                 struct auth_serversupplied_info **server_info)
1157 {
1158         *server_info = copy_session_info_serverinfo(mem_ctx, guest_info);
1159         return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1160 }
1161
1162 NTSTATUS make_session_info_guest(TALLOC_CTX *mem_ctx,
1163                                 struct auth3_session_info **session_info)
1164 {
1165         *session_info = copy_session_info(mem_ctx, guest_info);
1166         return (*session_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1167 }
1168
1169 static struct auth3_session_info *system_info = NULL;
1170
1171 NTSTATUS init_system_info(void)
1172 {
1173         if (system_info != NULL)
1174                 return NT_STATUS_OK;
1175
1176         return make_new_session_info_system(NULL, &system_info);
1177 }
1178
1179 NTSTATUS make_session_info_system(TALLOC_CTX *mem_ctx,
1180                                 struct auth3_session_info **session_info)
1181 {
1182         if (system_info == NULL) return NT_STATUS_UNSUCCESSFUL;
1183         *session_info = copy_session_info(mem_ctx, system_info);
1184         return (*session_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1185 }
1186
1187 const struct auth3_session_info *get_session_info_system(void)
1188 {
1189     return system_info;
1190 }
1191
1192 bool copy_current_user(struct current_user *dst, struct current_user *src)
1193 {
1194         gid_t *groups;
1195         struct security_token *nt_token;
1196
1197         groups = (gid_t *)memdup(src->ut.groups,
1198                                  sizeof(gid_t) * src->ut.ngroups);
1199         if ((src->ut.ngroups != 0) && (groups == NULL)) {
1200                 return False;
1201         }
1202
1203         nt_token = dup_nt_token(NULL, src->nt_user_token);
1204         if (nt_token == NULL) {
1205                 SAFE_FREE(groups);
1206                 return False;
1207         }
1208
1209         dst->conn = src->conn;
1210         dst->vuid = src->vuid;
1211         dst->ut.uid = src->ut.uid;
1212         dst->ut.gid = src->ut.gid;
1213         dst->ut.ngroups = src->ut.ngroups;
1214         dst->ut.groups = groups;
1215         dst->nt_user_token = nt_token;
1216         return True;
1217 }
1218
1219 /***************************************************************************
1220  Purely internal function for make_server_info_info3
1221 ***************************************************************************/
1222
1223 static NTSTATUS check_account(TALLOC_CTX *mem_ctx, const char *domain,
1224                               const char *username, char **found_username,
1225                               struct passwd **pwd,
1226                               bool *username_was_mapped)
1227 {
1228         char *orig_dom_user = NULL;
1229         char *dom_user = NULL;
1230         char *lower_username = NULL;
1231         char *real_username = NULL;
1232         struct passwd *passwd;
1233
1234         lower_username = talloc_strdup(mem_ctx, username);
1235         if (!lower_username) {
1236                 return NT_STATUS_NO_MEMORY;
1237         }
1238         strlower_m( lower_username );
1239
1240         orig_dom_user = talloc_asprintf(mem_ctx,
1241                                 "%s%c%s",
1242                                 domain,
1243                                 *lp_winbind_separator(),
1244                                 lower_username);
1245         if (!orig_dom_user) {
1246                 return NT_STATUS_NO_MEMORY;
1247         }
1248
1249         /* Get the passwd struct.  Try to create the account if necessary. */
1250
1251         *username_was_mapped = map_username(mem_ctx, orig_dom_user, &dom_user);
1252         if (!dom_user) {
1253                 return NT_STATUS_NO_MEMORY;
1254         }
1255
1256         passwd = smb_getpwnam(mem_ctx, dom_user, &real_username, True );
1257         if (!passwd) {
1258                 DEBUG(3, ("Failed to find authenticated user %s via "
1259                           "getpwnam(), denying access.\n", dom_user));
1260                 return NT_STATUS_NO_SUCH_USER;
1261         }
1262
1263         if (!real_username) {
1264                 return NT_STATUS_NO_MEMORY;
1265         }
1266
1267         *pwd = passwd;
1268
1269         /* This is pointless -- there is no suport for differing
1270            unix and windows names.  Make sure to always store the
1271            one we actually looked up and succeeded. Have I mentioned
1272            why I hate the 'winbind use default domain' parameter?
1273                                          --jerry              */
1274
1275         *found_username = talloc_strdup( mem_ctx, real_username );
1276
1277         return NT_STATUS_OK;
1278 }
1279
1280 /****************************************************************************
1281  Wrapper to allow the getpwnam() call to strip the domain name and
1282  try again in case a local UNIX user is already there.  Also run through
1283  the username if we fallback to the username only.
1284  ****************************************************************************/
1285
1286 struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, const char *domuser,
1287                              char **p_save_username, bool create )
1288 {
1289         struct passwd *pw = NULL;
1290         char *p = NULL;
1291         char *username = NULL;
1292
1293         /* we only save a copy of the username it has been mangled
1294            by winbindd use default domain */
1295         *p_save_username = NULL;
1296
1297         /* don't call map_username() here since it has to be done higher
1298            up the stack so we don't call it multiple times */
1299
1300         username = talloc_strdup(mem_ctx, domuser);
1301         if (!username) {
1302                 return NULL;
1303         }
1304
1305         p = strchr_m( username, *lp_winbind_separator() );
1306
1307         /* code for a DOMAIN\user string */
1308
1309         if ( p ) {
1310                 pw = Get_Pwnam_alloc( mem_ctx, domuser );
1311                 if ( pw ) {
1312                         /* make sure we get the case of the username correct */
1313                         /* work around 'winbind use default domain = yes' */
1314
1315                         if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1316                                 char *domain;
1317
1318                                 /* split the domain and username into 2 strings */
1319                                 *p = '\0';
1320                                 domain = username;
1321
1322                                 *p_save_username = talloc_asprintf(mem_ctx,
1323                                                                 "%s%c%s",
1324                                                                 domain,
1325                                                                 *lp_winbind_separator(),
1326                                                                 pw->pw_name);
1327                                 if (!*p_save_username) {
1328                                         TALLOC_FREE(pw);
1329                                         return NULL;
1330                                 }
1331                         } else {
1332                                 *p_save_username = talloc_strdup(mem_ctx, pw->pw_name);
1333                         }
1334
1335                         /* whew -- done! */
1336                         return pw;
1337                 }
1338
1339                 /* setup for lookup of just the username */
1340                 /* remember that p and username are overlapping memory */
1341
1342                 p++;
1343                 username = talloc_strdup(mem_ctx, p);
1344                 if (!username) {
1345                         return NULL;
1346                 }
1347         }
1348
1349         /* just lookup a plain username */
1350
1351         pw = Get_Pwnam_alloc(mem_ctx, username);
1352
1353         /* Create local user if requested but only if winbindd
1354            is not running.  We need to protect against cases
1355            where winbindd is failing and then prematurely
1356            creating users in /etc/passwd */
1357
1358         if ( !pw && create && !winbind_ping() ) {
1359                 /* Don't add a machine account. */
1360                 if (username[strlen(username)-1] == '$')
1361                         return NULL;
1362
1363                 _smb_create_user(NULL, username, NULL);
1364                 pw = Get_Pwnam_alloc(mem_ctx, username);
1365         }
1366
1367         /* one last check for a valid passwd struct */
1368
1369         if (pw) {
1370                 *p_save_username = talloc_strdup(mem_ctx, pw->pw_name);
1371         }
1372         return pw;
1373 }
1374
1375 /***************************************************************************
1376  Make a server_info struct from the info3 returned by a domain logon
1377 ***************************************************************************/
1378
1379 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1380                                 const char *sent_nt_username,
1381                                 const char *domain,
1382                                 struct auth_serversupplied_info **server_info,
1383                                 struct netr_SamInfo3 *info3)
1384 {
1385         static const char zeros[16] = {0, };
1386
1387         NTSTATUS nt_status = NT_STATUS_OK;
1388         char *found_username = NULL;
1389         const char *nt_domain;
1390         const char *nt_username;
1391         bool username_was_mapped;
1392         struct passwd *pwd;
1393         struct auth_serversupplied_info *result;
1394         struct dom_sid *group_sid;
1395         struct netr_SamInfo3 *i3;
1396
1397         /*
1398            Here is where we should check the list of
1399            trusted domains, and verify that the SID
1400            matches.
1401         */
1402
1403         nt_username = talloc_strdup(mem_ctx, info3->base.account_name.string);
1404         if (!nt_username) {
1405                 /* If the server didn't give us one, just use the one we sent
1406                  * them */
1407                 nt_username = sent_nt_username;
1408         }
1409
1410         nt_domain = talloc_strdup(mem_ctx, info3->base.domain.string);
1411         if (!nt_domain) {
1412                 /* If the server didn't give us one, just use the one we sent
1413                  * them */
1414                 nt_domain = domain;
1415         }
1416
1417         /* If getpwnam() fails try the add user script (2.2.x behavior).
1418
1419            We use the _unmapped_ username here in an attempt to provide
1420            consistent username mapping behavior between kerberos and NTLM[SSP]
1421            authentication in domain mode security.  I.E. Username mapping
1422            should be applied to the fully qualified username
1423            (e.g. DOMAIN\user) and not just the login name.  Yes this means we
1424            called map_username() unnecessarily in make_user_info_map() but
1425            that is how the current code is designed.  Making the change here
1426            is the least disruptive place.  -- jerry */
1427
1428         /* this call will try to create the user if necessary */
1429
1430         nt_status = check_account(mem_ctx, nt_domain, sent_nt_username,
1431                                      &found_username, &pwd,
1432                                      &username_was_mapped);
1433
1434         if (!NT_STATUS_IS_OK(nt_status)) {
1435                 return nt_status;
1436         }
1437
1438         result = make_server_info(NULL);
1439         if (result == NULL) {
1440                 DEBUG(4, ("make_server_info failed!\n"));
1441                 return NT_STATUS_NO_MEMORY;
1442         }
1443
1444         result->unix_name = talloc_strdup(result, found_username);
1445
1446         result->sanitized_username = sanitize_username(result,
1447                                                        result->unix_name);
1448         if (result->sanitized_username == NULL) {
1449                 TALLOC_FREE(result);
1450                 return NT_STATUS_NO_MEMORY;
1451         }
1452
1453         /* copy in the info3 */
1454         result->info3 = i3 = copy_netr_SamInfo3(result, info3);
1455         if (result->info3 == NULL) {
1456                 TALLOC_FREE(result);
1457                 return NT_STATUS_NO_MEMORY;
1458         }
1459
1460         /* Fill in the unix info we found on the way */
1461         result->utok.uid = pwd->pw_uid;
1462         result->utok.gid = pwd->pw_gid;
1463
1464         /* We can't just trust that the primary group sid sent us is something
1465          * we can really use. Obtain the useable sid, and store the original
1466          * one as an additional group if it had to be replaced */
1467         nt_status = get_primary_group_sid(mem_ctx, found_username,
1468                                           &pwd, &group_sid);
1469         if (!NT_STATUS_IS_OK(nt_status)) {
1470                 TALLOC_FREE(result);
1471                 return nt_status;
1472         }
1473
1474         /* store and check if it is the same we got originally */
1475         sid_peek_rid(group_sid, &i3->base.primary_gid);
1476         if (i3->base.primary_gid != info3->base.primary_gid) {
1477                 uint32_t n = i3->base.groups.count;
1478                 /* not the same, store the original as an additional group */
1479                 i3->base.groups.rids =
1480                         talloc_realloc(i3, i3->base.groups.rids,
1481                                         struct samr_RidWithAttribute, n + 1);
1482                 if (i3->base.groups.rids == NULL) {
1483                         TALLOC_FREE(result);
1484                         return NT_STATUS_NO_MEMORY;
1485                 }
1486                 i3->base.groups.rids[n].rid = info3->base.primary_gid;
1487                 i3->base.groups.rids[n].attributes = SE_GROUP_ENABLED;
1488                 i3->base.groups.count = n + 1;
1489         }
1490
1491         /* ensure we are never given NULL session keys */
1492
1493         if (memcmp(info3->base.key.key, zeros, sizeof(zeros)) == 0) {
1494                 result->session_key = data_blob_null;
1495         } else {
1496                 result->session_key = data_blob_talloc(
1497                         result, info3->base.key.key,
1498                         sizeof(info3->base.key.key));
1499         }
1500
1501         if (memcmp(info3->base.LMSessKey.key, zeros, 8) == 0) {
1502                 result->lm_session_key = data_blob_null;
1503         } else {
1504                 result->lm_session_key = data_blob_talloc(
1505                         result, info3->base.LMSessKey.key,
1506                         sizeof(info3->base.LMSessKey.key));
1507         }
1508
1509         result->nss_token |= username_was_mapped;
1510
1511         result->guest = (info3->base.user_flags & NETLOGON_GUEST);
1512
1513         *server_info = result;
1514
1515         return NT_STATUS_OK;
1516 }
1517
1518 /*****************************************************************************
1519  Make a server_info struct from the wbcAuthUserInfo returned by a domain logon
1520 ******************************************************************************/
1521
1522 NTSTATUS make_server_info_wbcAuthUserInfo(TALLOC_CTX *mem_ctx,
1523                                           const char *sent_nt_username,
1524                                           const char *domain,
1525                                           const struct wbcAuthUserInfo *info,
1526                                           struct auth_serversupplied_info **server_info)
1527 {
1528         struct netr_SamInfo3 *info3;
1529
1530         info3 = wbcAuthUserInfo_to_netr_SamInfo3(mem_ctx, info);
1531         if (!info3) {
1532                 return NT_STATUS_NO_MEMORY;
1533         }
1534
1535         return make_server_info_info3(mem_ctx,
1536                                       sent_nt_username, domain,
1537                                       server_info, info3);
1538 }
1539
1540 /**
1541  * Verify whether or not given domain is trusted.
1542  *
1543  * @param domain_name name of the domain to be verified
1544  * @return true if domain is one of the trusted ones or
1545  *         false if otherwise
1546  **/
1547
1548 bool is_trusted_domain(const char* dom_name)
1549 {
1550         struct dom_sid trustdom_sid;
1551         bool ret;
1552
1553         /* no trusted domains for a standalone server */
1554
1555         if ( lp_server_role() == ROLE_STANDALONE )
1556                 return False;
1557
1558         if (dom_name == NULL || dom_name[0] == '\0') {
1559                 return false;
1560         }
1561
1562         if (strequal(dom_name, get_global_sam_name())) {
1563                 return false;
1564         }
1565
1566         /* if we are a DC, then check for a direct trust relationships */
1567
1568         if ( IS_DC ) {
1569                 become_root();
1570                 DEBUG (5,("is_trusted_domain: Checking for domain trust with "
1571                           "[%s]\n", dom_name ));
1572                 ret = pdb_get_trusteddom_pw(dom_name, NULL, NULL, NULL);
1573                 unbecome_root();
1574                 if (ret)
1575                         return True;
1576         }
1577         else {
1578                 wbcErr result;
1579
1580                 /* If winbind is around, ask it */
1581
1582                 result = wb_is_trusted_domain(dom_name);
1583
1584                 if (result == WBC_ERR_SUCCESS) {
1585                         return True;
1586                 }
1587
1588                 if (result == WBC_ERR_DOMAIN_NOT_FOUND) {
1589                         /* winbind could not find the domain */
1590                         return False;
1591                 }
1592
1593                 /* The only other possible result is that winbind is not up
1594                    and running. We need to update the trustdom_cache
1595                    ourselves */
1596
1597                 update_trustdom_cache();
1598         }
1599
1600         /* now the trustdom cache should be available a DC could still
1601          * have a transitive trust so fall back to the cache of trusted
1602          * domains (like a domain member would use  */
1603
1604         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
1605                 return True;
1606         }
1607
1608         return False;
1609 }
1610