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_name,
 511                                                     session_info->guest,
 512                                                     &session_info->unix_token->uid,
 513                                                     &session_info->unix_token->gid,
 514                                                     &session_info->unix_name,
 515                                                     &session_info->security_token);
 516
 517         } else {
 518                 status = create_local_nt_token_from_info3(session_info,
 519                                                           session_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)->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)->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 struct auth_serversupplied_info *copy_serverinfo(TALLOC_CTX *mem_ctx,
 913                                                  const struct auth_serversupplied_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         dst->guest = src->guest;
 923         dst->system = src->system;
 924         dst->utok.uid = src->utok.uid;
 925         dst->utok.gid = src->utok.gid;
 926         dst->utok.ngroups = src->utok.ngroups;
 927         if (src->utok.ngroups != 0) {
 928                 dst->utok.groups = (gid_t *)talloc_memdup(
 929                         dst, src->utok.groups,
 930                         sizeof(gid_t)*dst->utok.ngroups);
 931         } else {
 932                 dst->utok.groups = NULL;
 933         }
 934
 935         if (src->security_token) {
 936                 dst->security_token = dup_nt_token(dst, src->security_token);
 937                 if (!dst->security_token) {
 938                         TALLOC_FREE(dst);
 939                         return NULL;
 940                 }
 941         }
 942
 943         dst->session_key = data_blob_talloc( dst, src->session_key.data,
 944                                                 src->session_key.length);
 945
 946         dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
 947                                                 src->lm_session_key.length);
 948
 949         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
 950         if (!dst->info3) {
 951                 TALLOC_FREE(dst);
 952                 return NULL;
 953         }
 954         dst->extra = src->extra;
 955
 956         dst->unix_name = talloc_strdup(dst, src->unix_name);
 957         if (!dst->unix_name) {
 958                 TALLOC_FREE(dst);
 959                 return NULL;
 960         }
 961
 962         dst->sanitized_username = talloc_strdup(dst, src->sanitized_username);
 963         if (!dst->sanitized_username) {
 964                 TALLOC_FREE(dst);
 965                 return NULL;
 966         }
 967
 968         return dst;
 969 }
 970
 971 static struct auth_serversupplied_info *copy_session_info_serverinfo(TALLOC_CTX *mem_ctx,
 972                                                               const struct auth3_session_info *src)
 973 {
 974         struct auth_serversupplied_info *dst;
 975
 976         dst = make_server_info(mem_ctx);
 977         if (dst == NULL) {
 978                 return NULL;
 979         }
 980
 981         dst->guest = src->guest;
 982         dst->system = src->system;
 983
 984         /* This element must be provided to convert back to an auth_serversupplied_info */
 985         SMB_ASSERT(src->unix_token);
 986         dst->utok.uid = src->unix_token->uid;
 987         dst->utok.gid = src->unix_token->gid;
 988         dst->utok.ngroups = src->unix_token->ngroups;
 989         if (src->unix_token->ngroups != 0) {
 990                 dst->utok.groups = (gid_t *)talloc_memdup(
 991                         dst, src->unix_token->groups,
 992                         sizeof(gid_t)*dst->utok.ngroups);
 993         } else {
 994                 dst->utok.groups = NULL;
 995         }
 996
 997         if (src->security_token) {
 998                 dst->security_token = dup_nt_token(dst, src->security_token);
 999                 if (!dst->security_token) {
1000                         TALLOC_FREE(dst);
1001                         return NULL;
1002                 }
1003         }
1004
1005         dst->session_key = data_blob_talloc( dst, src->session_key.data,
1006                                                 src->session_key.length);
1007
1008         dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
1009                                                 src->lm_session_key.length);
1010
1011         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
1012         if (!dst->info3) {
1013                 TALLOC_FREE(dst);
1014                 return NULL;
1015         }
1016         dst->extra = src->extra;
1017
1018         dst->unix_name = talloc_strdup(dst, src->unix_name);
1019         if (!dst->unix_name) {
1020                 TALLOC_FREE(dst);
1021                 return NULL;
1022         }
1023
1024         dst->sanitized_username = talloc_strdup(dst, src->sanitized_username);
1025         if (!dst->sanitized_username) {
1026                 TALLOC_FREE(dst);
1027                 return NULL;
1028         }
1029
1030         return dst;
1031 }
1032
1033 static struct auth3_session_info *copy_serverinfo_session_info(TALLOC_CTX *mem_ctx,
1034                                                         const struct auth_serversupplied_info *src)
1035 {
1036         struct auth3_session_info *dst;
1037
1038         dst = make_auth3_session_info(mem_ctx);
1039         if (dst == NULL) {
1040                 return NULL;
1041         }
1042
1043         dst->guest = src->guest;
1044         dst->system = src->system;
1045
1046         dst->unix_token = talloc(dst, struct security_unix_token);
1047         if (!dst->unix_token) {
1048                 return NULL;
1049         }
1050
1051         dst->unix_token->uid = src->utok.uid;
1052         dst->unix_token->gid = src->utok.gid;
1053         dst->unix_token->ngroups = src->utok.ngroups;
1054         if (src->utok.ngroups != 0) {
1055                 dst->unix_token->groups = (gid_t *)talloc_memdup(
1056                         dst->unix_token, src->utok.groups,
1057                         sizeof(gid_t)*dst->unix_token->ngroups);
1058         } else {
1059                 dst->unix_token->groups = NULL;
1060         }
1061
1062         if (src->security_token) {
1063                 dst->security_token = dup_nt_token(dst, src->security_token);
1064                 if (!dst->security_token) {
1065                         TALLOC_FREE(dst);
1066                         return NULL;
1067                 }
1068         }
1069
1070         dst->session_key = data_blob_talloc( dst, src->session_key.data,
1071                                                 src->session_key.length);
1072
1073         dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
1074                                                 src->lm_session_key.length);
1075
1076         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
1077         if (!dst->info3) {
1078                 TALLOC_FREE(dst);
1079                 return NULL;
1080         }
1081         dst->extra = src->extra;
1082
1083         dst->unix_name = talloc_strdup(dst, src->unix_name);
1084         if (!dst->unix_name) {
1085                 TALLOC_FREE(dst);
1086                 return NULL;
1087         }
1088
1089         dst->sanitized_username = talloc_strdup(dst, src->sanitized_username);
1090         if (!dst->sanitized_username) {
1091                 TALLOC_FREE(dst);
1092                 return NULL;
1093         }
1094
1095         return dst;
1096 }
1097
1098 struct auth3_session_info *copy_session_info(TALLOC_CTX *mem_ctx,
1099                                              const struct auth3_session_info *src)
1100 {
1101         struct auth3_session_info *dst;
1102
1103         dst = make_auth3_session_info(mem_ctx);
1104         if (dst == NULL) {
1105                 return NULL;
1106         }
1107
1108         dst->guest = src->guest;
1109         dst->system = src->system;
1110
1111         if (src->unix_token) {
1112                 dst->unix_token = talloc(dst, struct security_unix_token);
1113                 if (!dst->unix_token) {
1114                         return NULL;
1115                 }
1116
1117                 dst->unix_token->uid = src->unix_token->uid;
1118                 dst->unix_token->gid = src->unix_token->gid;
1119                 dst->unix_token->ngroups = src->unix_token->ngroups;
1120                 if (src->unix_token->ngroups != 0) {
1121                         dst->unix_token->groups = (gid_t *)talloc_memdup(
1122                                 dst->unix_token, src->unix_token->groups,
1123                                 sizeof(gid_t)*dst->unix_token->ngroups);
1124                 } else {
1125                         dst->unix_token->groups = NULL;
1126                 }
1127         } else {
1128                 dst->unix_token = NULL;
1129         }
1130
1131         if (src->security_token) {
1132                 dst->security_token = dup_nt_token(dst, src->security_token);
1133                 if (!dst->security_token) {
1134                         TALLOC_FREE(dst);
1135                         return NULL;
1136                 }
1137         }
1138
1139         dst->session_key = data_blob_talloc( dst, src->session_key.data,
1140                                                 src->session_key.length);
1141
1142         dst->lm_session_key = data_blob_talloc(dst, src->lm_session_key.data,
1143                                                 src->lm_session_key.length);
1144
1145         dst->info3 = copy_netr_SamInfo3(dst, src->info3);
1146         if (!dst->info3) {
1147                 TALLOC_FREE(dst);
1148                 return NULL;
1149         }
1150         dst->extra = src->extra;
1151
1152         dst->unix_name = talloc_strdup(dst, src->unix_name);
1153         if (!dst->unix_name) {
1154                 TALLOC_FREE(dst);
1155                 return NULL;
1156         }
1157
1158         dst->sanitized_username = talloc_strdup(dst, src->sanitized_username);
1159         if (!dst->sanitized_username) {
1160                 TALLOC_FREE(dst);
1161                 return NULL;
1162         }
1163
1164         return dst;
1165 }
1166
1167 /*
1168  * Set a new session key. Used in the rpc server where we have to override the
1169  * SMB level session key with SystemLibraryDTC
1170  */
1171
1172 bool session_info_set_session_key(struct auth3_session_info *info,
1173                                  DATA_BLOB session_key)
1174 {
1175         TALLOC_FREE(info->session_key.data);
1176
1177         info->session_key = data_blob_talloc(
1178                 info, session_key.data, session_key.length);
1179
1180         return (info->session_key.data != NULL);
1181 }
1182
1183 static struct auth3_session_info *guest_info = NULL;
1184
1185 bool init_guest_info(void)
1186 {
1187         if (guest_info != NULL)
1188                 return True;
1189
1190         return NT_STATUS_IS_OK(make_new_session_info_guest(&guest_info));
1191 }
1192
1193 NTSTATUS make_server_info_guest(TALLOC_CTX *mem_ctx,
1194                                 struct auth_serversupplied_info **server_info)
1195 {
1196         *server_info = copy_session_info_serverinfo(mem_ctx, guest_info);
1197         return (*server_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1198 }
1199
1200 NTSTATUS make_session_info_guest(TALLOC_CTX *mem_ctx,
1201                                 struct auth3_session_info **session_info)
1202 {
1203         *session_info = copy_session_info(mem_ctx, guest_info);
1204         return (*session_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1205 }
1206
1207 static struct auth3_session_info *system_info = NULL;
1208
1209 NTSTATUS init_system_info(void)
1210 {
1211         if (system_info != NULL)
1212                 return NT_STATUS_OK;
1213
1214         return make_new_session_info_system(NULL, &system_info);
1215 }
1216
1217 NTSTATUS make_session_info_system(TALLOC_CTX *mem_ctx,
1218                                 struct auth3_session_info **session_info)
1219 {
1220         if (system_info == NULL) return NT_STATUS_UNSUCCESSFUL;
1221         *session_info = copy_session_info(mem_ctx, system_info);
1222         return (*session_info != NULL) ? NT_STATUS_OK : NT_STATUS_NO_MEMORY;
1223 }
1224
1225 const struct auth3_session_info *get_session_info_system(void)
1226 {
1227     return system_info;
1228 }
1229
1230 bool copy_current_user(struct current_user *dst, struct current_user *src)
1231 {
1232         gid_t *groups;
1233         struct security_token *nt_token;
1234
1235         groups = (gid_t *)memdup(src->ut.groups,
1236                                  sizeof(gid_t) * src->ut.ngroups);
1237         if ((src->ut.ngroups != 0) && (groups == NULL)) {
1238                 return False;
1239         }
1240
1241         nt_token = dup_nt_token(NULL, src->nt_user_token);
1242         if (nt_token == NULL) {
1243                 SAFE_FREE(groups);
1244                 return False;
1245         }
1246
1247         dst->conn = src->conn;
1248         dst->vuid = src->vuid;
1249         dst->ut.uid = src->ut.uid;
1250         dst->ut.gid = src->ut.gid;
1251         dst->ut.ngroups = src->ut.ngroups;
1252         dst->ut.groups = groups;
1253         dst->nt_user_token = nt_token;
1254         return True;
1255 }
1256
1257 /***************************************************************************
1258  Purely internal function for make_server_info_info3
1259 ***************************************************************************/
1260
1261 static NTSTATUS check_account(TALLOC_CTX *mem_ctx, const char *domain,
1262                               const char *username, char **found_username,
1263                               struct passwd **pwd,
1264                               bool *username_was_mapped)
1265 {
1266         char *orig_dom_user = NULL;
1267         char *dom_user = NULL;
1268         char *lower_username = NULL;
1269         char *real_username = NULL;
1270         struct passwd *passwd;
1271
1272         lower_username = talloc_strdup(mem_ctx, username);
1273         if (!lower_username) {
1274                 return NT_STATUS_NO_MEMORY;
1275         }
1276         strlower_m( lower_username );
1277
1278         orig_dom_user = talloc_asprintf(mem_ctx,
1279                                 "%s%c%s",
1280                                 domain,
1281                                 *lp_winbind_separator(),
1282                                 lower_username);
1283         if (!orig_dom_user) {
1284                 return NT_STATUS_NO_MEMORY;
1285         }
1286
1287         /* Get the passwd struct.  Try to create the account if necessary. */
1288
1289         *username_was_mapped = map_username(mem_ctx, orig_dom_user, &dom_user);
1290         if (!dom_user) {
1291                 return NT_STATUS_NO_MEMORY;
1292         }
1293
1294         passwd = smb_getpwnam(mem_ctx, dom_user, &real_username, True );
1295         if (!passwd) {
1296                 DEBUG(3, ("Failed to find authenticated user %s via "
1297                           "getpwnam(), denying access.\n", dom_user));
1298                 return NT_STATUS_NO_SUCH_USER;
1299         }
1300
1301         if (!real_username) {
1302                 return NT_STATUS_NO_MEMORY;
1303         }
1304
1305         *pwd = passwd;
1306
1307         /* This is pointless -- there is no suport for differing
1308            unix and windows names.  Make sure to always store the
1309            one we actually looked up and succeeded. Have I mentioned
1310            why I hate the 'winbind use default domain' parameter?
1311                                          --jerry              */
1312
1313         *found_username = talloc_strdup( mem_ctx, real_username );
1314
1315         return NT_STATUS_OK;
1316 }
1317
1318 /****************************************************************************
1319  Wrapper to allow the getpwnam() call to strip the domain name and
1320  try again in case a local UNIX user is already there.  Also run through
1321  the username if we fallback to the username only.
1322  ****************************************************************************/
1323
1324 struct passwd *smb_getpwnam( TALLOC_CTX *mem_ctx, const char *domuser,
1325                              char **p_save_username, bool create )
1326 {
1327         struct passwd *pw = NULL;
1328         char *p = NULL;
1329         char *username = NULL;
1330
1331         /* we only save a copy of the username it has been mangled
1332            by winbindd use default domain */
1333         *p_save_username = NULL;
1334
1335         /* don't call map_username() here since it has to be done higher
1336            up the stack so we don't call it multiple times */
1337
1338         username = talloc_strdup(mem_ctx, domuser);
1339         if (!username) {
1340                 return NULL;
1341         }
1342
1343         p = strchr_m( username, *lp_winbind_separator() );
1344
1345         /* code for a DOMAIN\user string */
1346
1347         if ( p ) {
1348                 pw = Get_Pwnam_alloc( mem_ctx, domuser );
1349                 if ( pw ) {
1350                         /* make sure we get the case of the username correct */
1351                         /* work around 'winbind use default domain = yes' */
1352
1353                         if ( !strchr_m( pw->pw_name, *lp_winbind_separator() ) ) {
1354                                 char *domain;
1355
1356                                 /* split the domain and username into 2 strings */
1357                                 *p = '\0';
1358                                 domain = username;
1359
1360                                 *p_save_username = talloc_asprintf(mem_ctx,
1361                                                                 "%s%c%s",
1362                                                                 domain,
1363                                                                 *lp_winbind_separator(),
1364                                                                 pw->pw_name);
1365                                 if (!*p_save_username) {
1366                                         TALLOC_FREE(pw);
1367                                         return NULL;
1368                                 }
1369                         } else {
1370                                 *p_save_username = talloc_strdup(mem_ctx, pw->pw_name);
1371                         }
1372
1373                         /* whew -- done! */
1374                         return pw;
1375                 }
1376
1377                 /* setup for lookup of just the username */
1378                 /* remember that p and username are overlapping memory */
1379
1380                 p++;
1381                 username = talloc_strdup(mem_ctx, p);
1382                 if (!username) {
1383                         return NULL;
1384                 }
1385         }
1386
1387         /* just lookup a plain username */
1388
1389         pw = Get_Pwnam_alloc(mem_ctx, username);
1390
1391         /* Create local user if requested but only if winbindd
1392            is not running.  We need to protect against cases
1393            where winbindd is failing and then prematurely
1394            creating users in /etc/passwd */
1395
1396         if ( !pw && create && !winbind_ping() ) {
1397                 /* Don't add a machine account. */
1398                 if (username[strlen(username)-1] == '$')
1399                         return NULL;
1400
1401                 _smb_create_user(NULL, username, NULL);
1402                 pw = Get_Pwnam_alloc(mem_ctx, username);
1403         }
1404
1405         /* one last check for a valid passwd struct */
1406
1407         if (pw) {
1408                 *p_save_username = talloc_strdup(mem_ctx, pw->pw_name);
1409         }
1410         return pw;
1411 }
1412
1413 /***************************************************************************
1414  Make a server_info struct from the info3 returned by a domain logon
1415 ***************************************************************************/
1416
1417 NTSTATUS make_server_info_info3(TALLOC_CTX *mem_ctx,
1418                                 const char *sent_nt_username,
1419                                 const char *domain,
1420                                 struct auth_serversupplied_info **server_info,
1421                                 struct netr_SamInfo3 *info3)
1422 {
1423         static const char zeros[16] = {0, };
1424
1425         NTSTATUS nt_status = NT_STATUS_OK;
1426         char *found_username = NULL;
1427         const char *nt_domain;
1428         const char *nt_username;
1429         bool username_was_mapped;
1430         struct passwd *pwd;
1431         struct auth_serversupplied_info *result;
1432         struct dom_sid *group_sid;
1433         struct netr_SamInfo3 *i3;
1434
1435         /*
1436            Here is where we should check the list of
1437            trusted domains, and verify that the SID
1438            matches.
1439         */
1440
1441         nt_username = talloc_strdup(mem_ctx, info3->base.account_name.string);
1442         if (!nt_username) {
1443                 /* If the server didn't give us one, just use the one we sent
1444                  * them */
1445                 nt_username = sent_nt_username;
1446         }
1447
1448         nt_domain = talloc_strdup(mem_ctx, info3->base.domain.string);
1449         if (!nt_domain) {
1450                 /* If the server didn't give us one, just use the one we sent
1451                  * them */
1452                 nt_domain = domain;
1453         }
1454
1455         /* If getpwnam() fails try the add user script (2.2.x behavior).
1456
1457            We use the _unmapped_ username here in an attempt to provide
1458            consistent username mapping behavior between kerberos and NTLM[SSP]
1459            authentication in domain mode security.  I.E. Username mapping
1460            should be applied to the fully qualified username
1461            (e.g. DOMAIN\user) and not just the login name.  Yes this means we
1462            called map_username() unnecessarily in make_user_info_map() but
1463            that is how the current code is designed.  Making the change here
1464            is the least disruptive place.  -- jerry */
1465
1466         /* this call will try to create the user if necessary */
1467
1468         nt_status = check_account(mem_ctx, nt_domain, sent_nt_username,
1469                                      &found_username, &pwd,
1470                                      &username_was_mapped);
1471
1472         if (!NT_STATUS_IS_OK(nt_status)) {
1473                 return nt_status;
1474         }
1475
1476         result = make_server_info(NULL);
1477         if (result == NULL) {
1478                 DEBUG(4, ("make_server_info failed!\n"));
1479                 return NT_STATUS_NO_MEMORY;
1480         }
1481
1482         result->unix_name = talloc_strdup(result, found_username);
1483
1484         result->sanitized_username = sanitize_username(result,
1485                                                        result->unix_name);
1486         if (result->sanitized_username == NULL) {
1487                 TALLOC_FREE(result);
1488                 return NT_STATUS_NO_MEMORY;
1489         }
1490
1491         /* copy in the info3 */
1492         result->info3 = i3 = copy_netr_SamInfo3(result, info3);
1493         if (result->info3 == NULL) {
1494                 TALLOC_FREE(result);
1495                 return NT_STATUS_NO_MEMORY;
1496         }
1497
1498         /* Fill in the unix info we found on the way */
1499         result->utok.uid = pwd->pw_uid;
1500         result->utok.gid = pwd->pw_gid;
1501
1502         /* We can't just trust that the primary group sid sent us is something
1503          * we can really use. Obtain the useable sid, and store the original
1504          * one as an additional group if it had to be replaced */
1505         nt_status = get_primary_group_sid(mem_ctx, found_username,
1506                                           &pwd, &group_sid);
1507         if (!NT_STATUS_IS_OK(nt_status)) {
1508                 TALLOC_FREE(result);
1509                 return nt_status;
1510         }
1511
1512         /* store and check if it is the same we got originally */
1513         sid_peek_rid(group_sid, &i3->base.primary_gid);
1514         if (i3->base.primary_gid != info3->base.primary_gid) {
1515                 uint32_t n = i3->base.groups.count;
1516                 /* not the same, store the original as an additional group */
1517                 i3->base.groups.rids =
1518                         talloc_realloc(i3, i3->base.groups.rids,
1519                                         struct samr_RidWithAttribute, n + 1);
1520                 if (i3->base.groups.rids == NULL) {
1521                         TALLOC_FREE(result);
1522                         return NT_STATUS_NO_MEMORY;
1523                 }
1524                 i3->base.groups.rids[n].rid = info3->base.primary_gid;
1525                 i3->base.groups.rids[n].attributes = SE_GROUP_ENABLED;
1526                 i3->base.groups.count = n + 1;
1527         }
1528
1529         /* ensure we are never given NULL session keys */
1530
1531         if (memcmp(info3->base.key.key, zeros, sizeof(zeros)) == 0) {
1532                 result->session_key = data_blob_null;
1533         } else {
1534                 result->session_key = data_blob_talloc(
1535                         result, info3->base.key.key,
1536                         sizeof(info3->base.key.key));
1537         }
1538
1539         if (memcmp(info3->base.LMSessKey.key, zeros, 8) == 0) {
1540                 result->lm_session_key = data_blob_null;
1541         } else {
1542                 result->lm_session_key = data_blob_talloc(
1543                         result, info3->base.LMSessKey.key,
1544                         sizeof(info3->base.LMSessKey.key));
1545         }
1546
1547         result->nss_token |= username_was_mapped;
1548
1549         result->guest = (info3->base.user_flags & NETLOGON_GUEST);
1550
1551         *server_info = result;
1552
1553         return NT_STATUS_OK;
1554 }
1555
1556 /*****************************************************************************
1557  Make a server_info struct from the wbcAuthUserInfo returned by a domain logon
1558 ******************************************************************************/
1559
1560 NTSTATUS make_server_info_wbcAuthUserInfo(TALLOC_CTX *mem_ctx,
1561                                           const char *sent_nt_username,
1562                                           const char *domain,
1563                                           const struct wbcAuthUserInfo *info,
1564                                           struct auth_serversupplied_info **server_info)
1565 {
1566         struct netr_SamInfo3 *info3;
1567
1568         info3 = wbcAuthUserInfo_to_netr_SamInfo3(mem_ctx, info);
1569         if (!info3) {
1570                 return NT_STATUS_NO_MEMORY;
1571         }
1572
1573         return make_server_info_info3(mem_ctx,
1574                                       sent_nt_username, domain,
1575                                       server_info, info3);
1576 }
1577
1578 /**
1579  * Verify whether or not given domain is trusted.
1580  *
1581  * @param domain_name name of the domain to be verified
1582  * @return true if domain is one of the trusted ones or
1583  *         false if otherwise
1584  **/
1585
1586 bool is_trusted_domain(const char* dom_name)
1587 {
1588         struct dom_sid trustdom_sid;
1589         bool ret;
1590
1591         /* no trusted domains for a standalone server */
1592
1593         if ( lp_server_role() == ROLE_STANDALONE )
1594                 return False;
1595
1596         if (dom_name == NULL || dom_name[0] == '\0') {
1597                 return false;
1598         }
1599
1600         if (strequal(dom_name, get_global_sam_name())) {
1601                 return false;
1602         }
1603
1604         /* if we are a DC, then check for a direct trust relationships */
1605
1606         if ( IS_DC ) {
1607                 become_root();
1608                 DEBUG (5,("is_trusted_domain: Checking for domain trust with "
1609                           "[%s]\n", dom_name ));
1610                 ret = pdb_get_trusteddom_pw(dom_name, NULL, NULL, NULL);
1611                 unbecome_root();
1612                 if (ret)
1613                         return True;
1614         }
1615         else {
1616                 wbcErr result;
1617
1618                 /* If winbind is around, ask it */
1619
1620                 result = wb_is_trusted_domain(dom_name);
1621
1622                 if (result == WBC_ERR_SUCCESS) {
1623                         return True;
1624                 }
1625
1626                 if (result == WBC_ERR_DOMAIN_NOT_FOUND) {
1627                         /* winbind could not find the domain */
1628                         return False;
1629                 }
1630
1631                 /* The only other possible result is that winbind is not up
1632                    and running. We need to update the trustdom_cache
1633                    ourselves */
1634
1635                 update_trustdom_cache();
1636         }
1637
1638         /* now the trustdom cache should be available a DC could still
1639          * have a transitive trust so fall back to the cache of trusted
1640          * domains (like a domain member would use  */
1641
1642         if ( trustdom_cache_fetch(dom_name, &trustdom_sid) ) {
1643                 return True;
1644         }
1645
1646         return False;
1647 }
1648