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         (*session_info)->lm_session_key = data_blob(zeros, sizeof(zeros));
 824
 825         alpha_strcpy(tmp, (*session_info)->info3->base.account_name.string,
 826                      ". _-$", sizeof(tmp));
 827         (*session_info)->unix_info->sanitized_username = talloc_strdup(*session_info, tmp);
 828
 829         status = NT_STATUS_OK;
 830 done:
 831         TALLOC_FREE(tmp_ctx);
 832         return status;
 833 }
 834
 835 /***************************************************************************
 836  Make (and fill) a auth_session_info struct for a system user login.
 837  This *must* succeed for smbd to start.
 838 ***************************************************************************/
 839
 840 static NTSTATUS make_new_session_info_system(TALLOC_CTX *mem_ctx,
 841                                             struct auth3_session_info **session_info)
 842 {
 843         struct passwd *pwd;
 844         NTSTATUS status;
 845
 846         pwd = getpwuid_alloc(mem_ctx, sec_initial_uid());
 847         if (pwd == NULL) {
 848                 return NT_STATUS_NO_SUCH_USER;
 849         }
 850
 851         status = make_session_info_from_username(mem_ctx,
 852                                                  pwd->pw_name,
 853                                                  false,
 854                                                  session_info);
 855         TALLOC_FREE(pwd);
 856         if (!NT_STATUS_IS_OK(status)) {
 857                 return status;
 858         }
 859
 860         (*session_info)->unix_info->system = true;
 861
 862         status = add_sid_to_array_unique((*session_info)->security_token->sids,
 863                                          &global_sid_System,
 864                                          &(*session_info)->security_token->sids,
 865                                          &(*session_info)->security_token->num_sids);
 866         if (!NT_STATUS_IS_OK(status)) {
 867                 TALLOC_FREE((*session_info));
 868                 return status;
 869         }
 870
 871         return NT_STATUS_OK;
 872 }
 873
 874 /****************************************************************************
 875   Fake a auth3_session_info just from a username (as a
 876   session_info structure, with create_local_token() already called on
 877   it.
 878 ****************************************************************************/
 879
 880 NTSTATUS make_session_info_from_username(TALLOC_CTX *mem_ctx,
 881                                          const char *username,
 882                                          bool is_guest,
 883                                          struct auth3_session_info **session_info)
 884 {
 885         struct auth_serversupplied_info *result;
 886         struct passwd *pwd;
 887         NTSTATUS status;
 888
 889         pwd = Get_Pwnam_alloc(talloc_tos(), username);
 890         if (pwd == NULL) {
 891                 return NT_STATUS_NO_SUCH_USER;
 892         }
 893
 894         status = make_server_info_pw(&result, pwd->pw_name, pwd);
 895
 896         TALLOC_FREE(pwd);
 897
 898         if (!NT_STATUS_IS_OK(status)) {
 899                 return status;
 900         }
 901
 902         result->nss_token = true;
 903         result->guest = is_guest;
 904
 905         /* Now turn the server_info into a session_info with the full token etc */
 906         status = create_local_token(mem_ctx, result, NULL, session_info);
 907         talloc_free(result);
 908         return status;
 909 }
 910
 911
 912 static struct auth_serversupplied_info *copy_session_info_serverinfo(TALLOC_CTX *mem_ctx,
 913                                                               const struct auth3_session_info *src)
 914 {
 915         struct auth_serversupplied_info *dst;
 916
 917         dst = make_server_info(mem_ctx);
 918         if (dst == NULL) {
 919                 return NULL;
 920         }
 921
 922         /* This element must be provided to convert back to an auth_serversupplied_info */
 923         SMB_ASSERT(src->unix_info);
 924
 925         dst->guest = src->unix_info->guest;
 926         dst->system = src->unix_info->system;
 927
 928         /* This element must be provided to convert back to an auth_serversupplied_info */
 929         SMB_ASSERT(src->unix_token);
 930         dst->utok.uid = src->unix_token->uid;
 931         dst->utok.gid = src->unix_token->gid;
 932         dst->utok.ngroups = src->unix_token->ngroups;
 933         if (src->unix_token->ngroups != 0) {
 934                 dst->utok.groups = (gid_t *)talloc_memdup(
 935                         dst, src->unix_token->groups,
 936                         sizeof(gid_t)*dst->utok.ngroups);
 937         } else {
 938                 dst->utok.groups = NULL;
 939         }
 940
 941         if (src->security_token) {
 942                 dst->security_token = dup_nt_token(dst, src->security_token);
 943                 if (!dst->security_token) {
 944                         TALLOC_FREE(dst);
 945                         return NULL;
 946                 }
 947         }
 948
 949         dst->session_key = data_blob_talloc( dst, src->session_key.data,
 950                                                 src->session_key.length);
 951
 952         dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
 953                                                 src->lm_session_key.length);
 954
 955         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
 956         if (!dst->info3) {
 957                 TALLOC_FREE(dst);
 958                 return NULL;
 959         }
 960         dst->extra = src->extra;
 961
 962         dst->unix_name = talloc_strdup(dst, src->unix_info->unix_name);
 963         if (!dst->unix_name) {
 964                 TALLOC_FREE(dst);
 965                 return NULL;
 966         }
 967
 968         dst->sanitized_username = talloc_strdup(dst, src->unix_info->sanitized_username);
 969         if (!dst->sanitized_username) {
 970                 TALLOC_FREE(dst);
 971                 return NULL;
 972         }
 973
 974         return dst;
 975 }
 976
 977 static struct auth3_session_info *copy_serverinfo_session_info(TALLOC_CTX *mem_ctx,
 978                                                         const struct auth_serversupplied_info *src)
 979 {
 980         struct auth3_session_info *dst;
 981
 982         dst = make_auth3_session_info(mem_ctx);
 983         if (dst == NULL) {
 984                 return NULL;
 985         }
 986
 987         dst->unix_token = talloc(dst, struct security_unix_token);
 988         if (!dst->unix_token) {
 989                 return NULL;
 990         }
 991
 992         dst->unix_token->uid = src->utok.uid;
 993         dst->unix_token->gid = src->utok.gid;
 994         dst->unix_token->ngroups = src->utok.ngroups;
 995         if (src->utok.ngroups != 0) {
 996                 dst->unix_token->groups = (gid_t *)talloc_memdup(
 997                         dst->unix_token, src->utok.groups,
 998                         sizeof(gid_t)*dst->unix_token->ngroups);
 999         } else {
1000                 dst->unix_token->groups = NULL;
1001         }
1002
1003         if (src->security_token) {
1004                 dst->security_token = dup_nt_token(dst, src->security_token);
1005                 if (!dst->security_token) {
1006                         TALLOC_FREE(dst);
1007                         return NULL;
1008                 }
1009         }
1010
1011         dst->session_key = data_blob_talloc( dst, src->session_key.data,
1012                                                 src->session_key.length);
1013
1014         dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
1015                                                 src->lm_session_key.length);
1016
1017         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
1018         if (!dst->info3) {
1019                 TALLOC_FREE(dst);
1020                 return NULL;
1021         }
1022         dst->extra = src->extra;
1023
1024         dst->unix_info = talloc_zero(dst, struct auth_user_info_unix);
1025         if (!dst->unix_info) {
1026                 TALLOC_FREE(dst);
1027                 return NULL;
1028         }
1029
1030         dst->unix_info->unix_name = talloc_strdup(dst, src->unix_name);
1031         if (!dst->unix_info->unix_name) {
1032                 TALLOC_FREE(dst);
1033                 return NULL;
1034         }
1035
1036         dst->unix_info->sanitized_username = talloc_strdup(dst, src->sanitized_username);
1037         if (!dst->unix_info->sanitized_username) {
1038                 TALLOC_FREE(dst);
1039                 return NULL;
1040         }
1041
1042         dst->unix_info->guest = src->guest;
1043         dst->unix_info->system = src->system;
1044
1045         return dst;
1046 }
1047
1048 struct auth3_session_info *copy_session_info(TALLOC_CTX *mem_ctx,
1049                                              const struct auth3_session_info *src)
1050 {
1051         struct auth3_session_info *dst;
1052
1053         dst = make_auth3_session_info(mem_ctx);
1054         if (dst == NULL) {
1055                 return NULL;
1056         }
1057
1058         if (src->unix_token) {
1059                 dst->unix_token = talloc(dst, struct security_unix_token);
1060                 if (!dst->unix_token) {
1061                         return NULL;
1062                 }
1063
1064                 dst->unix_token->uid = src->unix_token->uid;
1065                 dst->unix_token->gid = src->unix_token->gid;
1066                 dst->unix_token->ngroups = src->unix_token->ngroups;
1067                 if (src->unix_token->ngroups != 0) {
1068                         dst->unix_token->groups = (gid_t *)talloc_memdup(
1069                                 dst->unix_token, src->unix_token->groups,
1070                                 sizeof(gid_t)*dst->unix_token->ngroups);
1071                 } else {
1072                         dst->unix_token->groups = NULL;
1073                 }
1074         } else {
1075                 dst->unix_token = NULL;
1076         }
1077
1078         if (src->security_token) {
1079                 dst->security_token = dup_nt_token(dst, src->security_token);
1080                 if (!dst->security_token) {
1081                         TALLOC_FREE(dst);
1082                         return NULL;
1083                 }
1084         }
1085
1086         dst->session_key = data_blob_talloc( dst, src->session_key.data,
1087                                                 src->session_key.length);
1088
1089         dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
1090                                                 src->lm_session_key.length);
1091
1092         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
1093         if (!dst->info3) {
1094                 TALLOC_FREE(dst);
1095                 return NULL;
1096         }
1097         dst->extra = src->extra;
1098
1099         if (src->unix_info) {
1100                 dst->unix_info = talloc_zero(dst, struct auth_user_info_unix);
1101                 if (!dst->unix_info) {
1102                         TALLOC_FREE(dst);
1103                         return NULL;
1104                 }
1105
1106                 dst->unix_info->unix_name = talloc_strdup(dst, src->unix_info->unix_name);
1107                 if (!dst->unix_info->unix_name) {
1108                         TALLOC_FREE(dst);
1109                         return NULL;
1110                 }
1111
1112                 dst->unix_info->sanitized_username = talloc_strdup(dst, src->unix_info->sanitized_username);
1113                 if (!dst->unix_info->sanitized_username) {
1114                         TALLOC_FREE(dst);
1115                         return NULL;
1116                 }
1117
1118                 dst->unix_info->guest = src->unix_info->guest;
1119                 dst->unix_info->system = src->unix_info->system;
1120         }
1121
1122         return dst;
1123 }
1124
1125 /*
1126  * Set a new session key. Used in the rpc server where we have to override the
1127  * SMB level session key with SystemLibraryDTC
1128  */
1129
1130 bool session_info_set_session_key(struct auth3_session_info *info,
1131                                  DATA_BLOB session_key)
1132 {
1133         TALLOC_FREE(info->session_key.data);
1134
1135         info->session_key = data_blob_talloc(
1136                 info, session_key.data, session_key.length);
1137
1138         return (info->session_key.data != NULL);
1139 }
1140
1141 static struct auth3_session_info *guest_info = NULL;
1142
1143 bool init_guest_info(void)
1144 {
1145         if (guest_info != NULL)
1146                 return True;
1147
1148         return NT_STATUS_IS_OK(make_new_session_info_guest(&guest_info));
1149 }
1150
1151 NTSTATUS make_server_info_guest(TALLOC_CTX *mem_ctx,
1152                                 struct auth_serversupplied_info **server_info)
1153 {
1154         *server_info = copy_session_info_serverinfo(mem_ctx, guest_info);
1155         return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1156 }
1157
1158 NTSTATUS make_session_info_guest(TALLOC_CTX *mem_ctx,
1159                                 struct auth3_session_info **session_info)
1160 {
1161         *session_info = copy_session_info(mem_ctx, guest_info);
1162         return (*session_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1163 }
1164
1165 static struct auth3_session_info *system_info = NULL;
1166
1167 NTSTATUS init_system_info(void)
1168 {
1169         if (system_info != NULL)
1170                 return NT_STATUS_OK;
1171
1172         return make_new_session_info_system(NULL, &system_info);
1173 }
1174
1175 NTSTATUS make_session_info_system(TALLOC_CTX *mem_ctx,
1176                                 struct auth3_session_info **session_info)
1177 {
1178         if (system_info == NULL) return NT_STATUS_UNSUCCESSFUL;
1179         *session_info = copy_session_info(mem_ctx, system_info);
1180         return (*session_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1181 }
1182
1183 const struct auth3_session_info *get_session_info_system(void)
1184 {
1185     return system_info;
1186 }
1187
1188 bool copy_current_user(struct current_user *dst, struct current_user *src)
1189 {
1190         gid_t *groups;
1191         struct security_token *nt_token;
1192
1193         groups = (gid_t *)memdup(src->ut.groups,
1194                                  sizeof(gid_t) * src->ut.ngroups);
1195         if ((src->ut.ngroups != 0) && (groups == NULL)) {
1196                 return False;
1197         }
1198
1199         nt_token = dup_nt_token(NULL, src->nt_user_token);
1200         if (nt_token == NULL) {
1201                 SAFE_FREE(groups);
1202                 return False;
1203         }
1204
1205         dst->conn = src->conn;
1206         dst->vuid = src->vuid;
1207         dst->ut.uid = src->ut.uid;
1208         dst->ut.gid = src->ut.gid;
1209         dst->ut.ngroups = src->ut.ngroups;
1210         dst->ut.groups = groups;
1211         dst->nt_user_token = nt_token;
1212         return True;
1213 }
1214
1215 /***************************************************************************
1216  Purely internal function for make_server_info_info3
1217 ***************************************************************************/
1218
1219 static NTSTATUS check_account(TALLOC_CTX *mem_ctx, const char *domain,
1220                               const char *username, char **found_username,
1221                               struct passwd **pwd,
1222                               bool *username_was_mapped)
1223 {
1224         char *orig_dom_user = NULL;
1225         char *dom_user = NULL;
1226         char *lower_username = NULL;
1227         char *real_username = NULL;
1228         struct passwd *passwd;
1229
1230         lower_username = talloc_strdup(mem_ctx, username);
1231         if (!lower_username) {
1232                 return NT_STATUS_NO_MEMORY;
1233         }
1234         strlower_m( lower_username );
1235
1236         orig_dom_user = talloc_asprintf(mem_ctx,
1237                                 "%s%c%s",
1238                                 domain,
1239                                 *lp_winbind_separator(),
1240                                 lower_username);
1241         if (!orig_dom_user) {
1242                 return NT_STATUS_NO_MEMORY;
1243         }
1244
1245         /* Get the passwd struct.  Try to create the account if necessary. */
1246
1247         *username_was_mapped = map_username(mem_ctx, orig_dom_user, &dom_user);
1248         if (!dom_user) {
1249                 return NT_STATUS_NO_MEMORY;
1250         }
1251
1252         passwd = smb_getpwnam(mem_ctx, dom_user, &real_username, True );
1253         if (!passwd) {
1254                 DEBUG(3, ("Failed to find authenticated user %s via "
1255                           "getpwnam(), denying access.\n", dom_user));
1256                 return NT_STATUS_NO_SUCH_USER;
1257         }
1258
1259         if (!real_username) {
1260                 return NT_STATUS_NO_MEMORY;
1261         }
1262
1263         *pwd = passwd;
1264
1265         /* This is pointless -- there is no suport for differing
1266            unix and windows names.  Make sure to always store the
1267            one we actually looked up and succeeded. Have I mentioned
1268            why I hate the 'winbind use default domain' parameter?
1269                                          --jerry              */
1270
1271         *found_username = talloc_strdup( mem_ctx, real_username );
1272
1273         return NT_STATUS_OK;
1274 }
1275
1276 /****************************************************************************
1277  Wrapper to allow the getpwnam() call to strip the domain name and
1278  try again in case a local UNIX user is already there.  Also run through
1279  the username if we fallback to the username only.
1280  ****************************************************************************/
1281
1282 struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, const char *domuser,
1283                              char **p_save_username, bool create )
1284 {
1285         struct passwd *pw = NULL;
1286         char *p = NULL;
1287         char *username = NULL;
1288
1289         /* we only save a copy of the username it has been mangled
1290            by winbindd use default domain */
1291         *p_save_username = NULL;
1292
1293         /* don't call map_username() here since it has to be done higher
1294            up the stack so we don't call it multiple times */
1295
1296         username = talloc_strdup(mem_ctx, domuser);
1297         if (!username) {
1298                 return NULL;
1299         }
1300
1301         p = strchr_m( username, *lp_winbind_separator() );
1302
1303         /* code for a DOMAIN\user string */
1304
1305         if ( p ) {
1306                 pw = Get_Pwnam_alloc( mem_ctx, domuser );
1307                 if ( pw ) {
1308                         /* make sure we get the case of the username correct */
1309                         /* work around 'winbind use default domain = yes' */
1310
1311                         if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1312                                 char *domain;
1313
1314                                 /* split the domain and username into 2 strings */
1315                                 *p = '\0';
1316                                 domain = username;
1317
1318                                 *p_save_username = talloc_asprintf(mem_ctx,
1319                                                                 "%s%c%s",
1320                                                                 domain,
1321                                                                 *lp_winbind_separator(),
1322                                                                 pw->pw_name);
1323                                 if (!*p_save_username) {
1324                                         TALLOC_FREE(pw);
1325                                         return NULL;
1326                                 }
1327                         } else {
1328                                 *p_save_username = talloc_strdup(mem_ctx, pw->pw_name);
1329                         }
1330
1331                         /* whew -- done! */
1332                         return pw;
1333                 }
1334
1335                 /* setup for lookup of just the username */
1336                 /* remember that p and username are overlapping memory */
1337
1338                 p++;
1339                 username = talloc_strdup(mem_ctx, p);
1340                 if (!username) {
1341                         return NULL;
1342                 }
1343         }
1344
1345         /* just lookup a plain username */
1346
1347         pw = Get_Pwnam_alloc(mem_ctx, username);
1348
1349         /* Create local user if requested but only if winbindd
1350            is not running.  We need to protect against cases
1351            where winbindd is failing and then prematurely
1352            creating users in /etc/passwd */
1353
1354         if ( !pw && create && !winbind_ping() ) {
1355                 /* Don't add a machine account. */
1356                 if (username[strlen(username)-1] == '$')
1357                         return NULL;
1358
1359                 _smb_create_user(NULL, username, NULL);
1360                 pw = Get_Pwnam_alloc(mem_ctx, username);
1361         }
1362
1363         /* one last check for a valid passwd struct */
1364
1365         if (pw) {
1366                 *p_save_username = talloc_strdup(mem_ctx, pw->pw_name);
1367         }
1368         return pw;
1369 }
1370
1371 /***************************************************************************
1372  Make a server_info struct from the info3 returned by a domain logon
1373 ***************************************************************************/
1374
1375 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1376                                 const char *sent_nt_username,
1377                                 const char *domain,
1378                                 struct auth_serversupplied_info **server_info,
1379                                 struct netr_SamInfo3 *info3)
1380 {
1381         static const char zeros[16] = {0, };
1382
1383         NTSTATUS nt_status = NT_STATUS_OK;
1384         char *found_username = NULL;
1385         const char *nt_domain;
1386         const char *nt_username;
1387         bool username_was_mapped;
1388         struct passwd *pwd;
1389         struct auth_serversupplied_info *result;
1390         struct dom_sid *group_sid;
1391         struct netr_SamInfo3 *i3;
1392
1393         /*
1394            Here is where we should check the list of
1395            trusted domains, and verify that the SID
1396            matches.
1397         */
1398
1399         nt_username = talloc_strdup(mem_ctx, info3->base.account_name.string);
1400         if (!nt_username) {
1401                 /* If the server didn't give us one, just use the one we sent
1402                  * them */
1403                 nt_username = sent_nt_username;
1404         }
1405
1406         nt_domain = talloc_strdup(mem_ctx, info3->base.domain.string);
1407         if (!nt_domain) {
1408                 /* If the server didn't give us one, just use the one we sent
1409                  * them */
1410                 nt_domain = domain;
1411         }
1412
1413         /* If getpwnam() fails try the add user script (2.2.x behavior).
1414
1415            We use the _unmapped_ username here in an attempt to provide
1416            consistent username mapping behavior between kerberos and NTLM[SSP]
1417            authentication in domain mode security.  I.E. Username mapping
1418            should be applied to the fully qualified username
1419            (e.g. DOMAIN\user) and not just the login name.  Yes this means we
1420            called map_username() unnecessarily in make_user_info_map() but
1421            that is how the current code is designed.  Making the change here
1422            is the least disruptive place.  -- jerry */
1423
1424         /* this call will try to create the user if necessary */
1425
1426         nt_status = check_account(mem_ctx, nt_domain, sent_nt_username,
1427                                      &found_username, &pwd,
1428                                      &username_was_mapped);
1429
1430         if (!NT_STATUS_IS_OK(nt_status)) {
1431                 return nt_status;
1432         }
1433
1434         result = make_server_info(NULL);
1435         if (result == NULL) {
1436                 DEBUG(4, ("make_server_info failed!\n"));
1437                 return NT_STATUS_NO_MEMORY;
1438         }
1439
1440         result->unix_name = talloc_strdup(result, found_username);
1441
1442         result->sanitized_username = sanitize_username(result,
1443                                                        result->unix_name);
1444         if (result->sanitized_username == NULL) {
1445                 TALLOC_FREE(result);
1446                 return NT_STATUS_NO_MEMORY;
1447         }
1448
1449         /* copy in the info3 */
1450         result->info3 = i3 = copy_netr_SamInfo3(result, info3);
1451         if (result->info3 == NULL) {
1452                 TALLOC_FREE(result);
1453                 return NT_STATUS_NO_MEMORY;
1454         }
1455
1456         /* Fill in the unix info we found on the way */
1457         result->utok.uid = pwd->pw_uid;
1458         result->utok.gid = pwd->pw_gid;
1459
1460         /* We can't just trust that the primary group sid sent us is something
1461          * we can really use. Obtain the useable sid, and store the original
1462          * one as an additional group if it had to be replaced */
1463         nt_status = get_primary_group_sid(mem_ctx, found_username,
1464                                           &pwd, &group_sid);
1465         if (!NT_STATUS_IS_OK(nt_status)) {
1466                 TALLOC_FREE(result);
1467                 return nt_status;
1468         }
1469
1470         /* store and check if it is the same we got originally */
1471         sid_peek_rid(group_sid, &i3->base.primary_gid);
1472         if (i3->base.primary_gid != info3->base.primary_gid) {
1473                 uint32_t n = i3->base.groups.count;
1474                 /* not the same, store the original as an additional group */
1475                 i3->base.groups.rids =
1476                         talloc_realloc(i3, i3->base.groups.rids,
1477                                         struct samr_RidWithAttribute, n + 1);
1478                 if (i3->base.groups.rids == NULL) {
1479                         TALLOC_FREE(result);
1480                         return NT_STATUS_NO_MEMORY;
1481                 }
1482                 i3->base.groups.rids[n].rid = info3->base.primary_gid;
1483                 i3->base.groups.rids[n].attributes = SE_GROUP_ENABLED;
1484                 i3->base.groups.count = n + 1;
1485         }
1486
1487         /* ensure we are never given NULL session keys */
1488
1489         if (memcmp(info3->base.key.key, zeros, sizeof(zeros)) == 0) {
1490                 result->session_key = data_blob_null;
1491         } else {
1492                 result->session_key = data_blob_talloc(
1493                         result, info3->base.key.key,
1494                         sizeof(info3->base.key.key));
1495         }
1496
1497         if (memcmp(info3->base.LMSessKey.key, zeros, 8) == 0) {
1498                 result->lm_session_key = data_blob_null;
1499         } else {
1500                 result->lm_session_key = data_blob_talloc(
1501                         result, info3->base.LMSessKey.key,
1502                         sizeof(info3->base.LMSessKey.key));
1503         }
1504
1505         result->nss_token |= username_was_mapped;
1506
1507         result->guest = (info3->base.user_flags & NETLOGON_GUEST);
1508
1509         *server_info = result;
1510
1511         return NT_STATUS_OK;
1512 }
1513
1514 /*****************************************************************************
1515  Make a server_info struct from the wbcAuthUserInfo returned by a domain logon
1516 ******************************************************************************/
1517
1518 NTSTATUS make_server_info_wbcAuthUserInfo(TALLOC_CTX *mem_ctx,
1519                                           const char *sent_nt_username,
1520                                           const char *domain,
1521                                           const struct wbcAuthUserInfo *info,
1522                                           struct auth_serversupplied_info **server_info)
1523 {
1524         struct netr_SamInfo3 *info3;
1525
1526         info3 = wbcAuthUserInfo_to_netr_SamInfo3(mem_ctx, info);
1527         if (!info3) {
1528                 return NT_STATUS_NO_MEMORY;
1529         }
1530
1531         return make_server_info_info3(mem_ctx,
1532                                       sent_nt_username, domain,
1533                                       server_info, info3);
1534 }
1535
1536 /**
1537  * Verify whether or not given domain is trusted.
1538  *
1539  * @param domain_name name of the domain to be verified
1540  * @return true if domain is one of the trusted ones or
1541  *         false if otherwise
1542  **/
1543
1544 bool is_trusted_domain(const char* dom_name)
1545 {
1546         struct dom_sid trustdom_sid;
1547         bool ret;
1548
1549         /* no trusted domains for a standalone server */
1550
1551         if ( lp_server_role() == ROLE_STANDALONE )
1552                 return False;
1553
1554         if (dom_name == NULL || dom_name[0] == '\0') {
1555                 return false;
1556         }
1557
1558         if (strequal(dom_name, get_global_sam_name())) {
1559                 return false;
1560         }
1561
1562         /* if we are a DC, then check for a direct trust relationships */
1563
1564         if ( IS_DC ) {
1565                 become_root();
1566                 DEBUG (5,("is_trusted_domain: Checking for domain trust with "
1567                           "[%s]\n", dom_name ));
1568                 ret = pdb_get_trusteddom_pw(dom_name, NULL, NULL, NULL);
1569                 unbecome_root();
1570                 if (ret)
1571                         return True;
1572         }
1573         else {
1574                 wbcErr result;
1575
1576                 /* If winbind is around, ask it */
1577
1578                 result = wb_is_trusted_domain(dom_name);
1579
1580                 if (result == WBC_ERR_SUCCESS) {
1581                         return True;
1582                 }
1583
1584                 if (result == WBC_ERR_DOMAIN_NOT_FOUND) {
1585                         /* winbind could not find the domain */
1586                         return False;
1587                 }
1588
1589                 /* The only other possible result is that winbind is not up
1590                    and running. We need to update the trustdom_cache
1591                    ourselves */
1592
1593                 update_trustdom_cache();
1594         }
1595
1596         /* now the trustdom cache should be available a DC could still
1597          * have a transitive trust so fall back to the cache of trusted
1598          * domains (like a domain member would use  */
1599
1600         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
1601                 return True;
1602         }
1603
1604         return False;
1605 }
1606