source3/nsswitch/winbindd_pam.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Winbind daemon - pam auth funcions
   5
   6    Copyright (C) Andrew Tridgell 2000
   7    Copyright (C) Tim Potter 2001
   8    Copyright (C) Andrew Bartlett 2001-2002
   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 2 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, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26 #include "winbindd.h"
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_WINBIND
  29
  30
  31 static NTSTATUS append_info3_as_ndr(TALLOC_CTX *mem_ctx,
  32                                     struct winbindd_cli_state *state,
  33                                     NET_USER_INFO_3 *info3)
  34 {
  35         prs_struct ps;
  36         uint32 size;
  37         if (!prs_init(&ps, 256 /* Random, non-zero number */, mem_ctx, MARSHALL)) {
  38                 return NT_STATUS_NO_MEMORY;
  39         }
  40         if (!net_io_user_info3("", info3, &ps, 1, 3)) {
  41                 prs_mem_free(&ps);
  42                 return NT_STATUS_UNSUCCESSFUL;
  43         }
  44
  45         size = prs_data_size(&ps);
  46         state->response.extra_data = malloc(size);
  47         if (!state->response.extra_data) {
  48                 prs_mem_free(&ps);
  49                 return NT_STATUS_NO_MEMORY;
  50         }
  51         memset( state->response.extra_data, '\0', size );
  52         prs_copy_all_data_out(state->response.extra_data, &ps);
  53         state->response.length += size;
  54         prs_mem_free(&ps);
  55         return NT_STATUS_OK;
  56 }
  57
  58 static NTSTATUS check_info3_in_group(TALLOC_CTX *mem_ctx,
  59                                      NET_USER_INFO_3 *info3,
  60                                      const char *group_sid)
  61 {
  62         DOM_SID require_membership_of_sid;
  63         DOM_SID *all_sids;
  64         size_t num_all_sids = (2 + info3->num_groups2 + info3->num_other_sids);
  65         size_t i, j = 0;
  66
  67         /* Parse the 'required group' SID */
  68
  69         if (!group_sid || !group_sid[0]) {
  70                 /* NO sid supplied, all users may access */
  71                 return NT_STATUS_OK;
  72         }
  73
  74         if (!string_to_sid(&require_membership_of_sid, group_sid)) {
  75                 DEBUG(0, ("check_info3_in_group: could not parse %s as a SID!",
  76                           group_sid));
  77
  78                 return NT_STATUS_INVALID_PARAMETER;
  79         }
  80
  81         all_sids = talloc(mem_ctx, sizeof(DOM_SID) * num_all_sids);
  82         if (!all_sids)
  83                 return NT_STATUS_NO_MEMORY;
  84
  85         /* and create (by appending rids) the 'domain' sids */
  86
  87         sid_copy(&all_sids[0], &(info3->dom_sid.sid));
  88
  89         if (!sid_append_rid(&all_sids[0], info3->user_rid)) {
  90                 DEBUG(3,("could not append user's primary RID 0x%x\n",
  91                          info3->user_rid));
  92
  93                 return NT_STATUS_INVALID_PARAMETER;
  94         }
  95         j++;
  96
  97         sid_copy(&all_sids[1], &(info3->dom_sid.sid));
  98
  99         if (!sid_append_rid(&all_sids[1], info3->group_rid)) {
 100                 DEBUG(3,("could not append additional group rid 0x%x\n",
 101                          info3->group_rid));
 102
 103                 return NT_STATUS_INVALID_PARAMETER;
 104         }
 105         j++;
 106
 107         for (i = 0; i < info3->num_groups2; i++) {
 108
 109                 sid_copy(&all_sids[j], &(info3->dom_sid.sid));
 110
 111                 if (!sid_append_rid(&all_sids[j], info3->gids[i].g_rid)) {
 112                         DEBUG(3,("could not append additional group rid 0x%x\n",
 113                                 info3->gids[i].g_rid));
 114
 115                         return NT_STATUS_INVALID_PARAMETER;
 116                 }
 117                 j++;
 118         }
 119
 120         /* Copy 'other' sids.  We need to do sid filtering here to
 121            prevent possible elevation of privileges.  See:
 122
 123            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 124          */
 125
 126         for (i = 0; i < info3->num_other_sids; i++) {
 127                 sid_copy(&all_sids[info3->num_groups2 + i + 2],
 128                          &info3->other_sids[i].sid);
 129                 j++;
 130         }
 131
 132         for (i = 0; i < j; i++) {
 133                 fstring sid1, sid2;
 134                 DEBUG(10, ("User has SID: %s\n",
 135                            sid_to_string(sid1, &all_sids[i])));
 136                 if (sid_equal(&require_membership_of_sid, &all_sids[i])) {
 137                         DEBUG(10, ("SID %s matches %s - user permitted to authenticate!\n",
 138                                    sid_to_string(sid1, &require_membership_of_sid), sid_to_string(sid2, &all_sids[i])));
 139                         return NT_STATUS_OK;
 140                 }
 141         }
 142
 143         /* Do not distinguish this error from a wrong username/pw */
 144
 145         return NT_STATUS_LOGON_FAILURE;
 146 }
 147
 148 /**********************************************************************
 149  Authenticate a user with a clear text password
 150 **********************************************************************/
 151
 152 enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
 153 {
 154         NTSTATUS result;
 155         fstring name_domain, name_user;
 156         unsigned char trust_passwd[16];
 157         time_t last_change_time;
 158         uint32 sec_channel_type;
 159         NET_USER_INFO_3 info3;
 160         struct cli_state *cli = NULL;
 161         uchar chal[8];
 162         TALLOC_CTX *mem_ctx = NULL;
 163         DATA_BLOB lm_resp;
 164         DATA_BLOB nt_resp;
 165         DOM_CRED ret_creds;
 166         int attempts = 0;
 167         unsigned char local_lm_response[24];
 168         unsigned char local_nt_response[24];
 169         struct winbindd_domain *contact_domain;
 170         BOOL retry;
 171
 172         /* Ensure null termination */
 173         state->request.data.auth.user[sizeof(state->request.data.auth.user)-1]='\0';
 174
 175         /* Ensure null termination */
 176         state->request.data.auth.pass[sizeof(state->request.data.auth.pass)-1]='\0';
 177
 178         DEBUG(3, ("[%5lu]: pam auth %s\n", (unsigned long)state->pid,
 179                   state->request.data.auth.user));
 180
 181         if (!(mem_ctx = talloc_init("winbind pam auth for %s", state->request.data.auth.user))) {
 182                 DEBUG(0, ("winbindd_pam_auth: could not talloc_init()!\n"));
 183                 result = NT_STATUS_NO_MEMORY;
 184                 goto done;
 185         }
 186
 187         /* Parse domain and username */
 188
 189         parse_domain_user(state->request.data.auth.user, name_domain, name_user);
 190
 191         /* do password magic */
 192
 193
 194         generate_random_buffer(chal, 8);
 195         if (lp_client_ntlmv2_auth()) {
 196                 DATA_BLOB server_chal;
 197                 DATA_BLOB names_blob;
 198                 DATA_BLOB nt_response;
 199                 DATA_BLOB lm_response;
 200                 server_chal = data_blob_talloc(mem_ctx, chal, 8);
 201
 202                 /* note that the 'workgroup' here is a best guess - we don't know
 203                    the server's domain at this point.  The 'server name' is also
 204                    dodgy...
 205                 */
 206                 names_blob = NTLMv2_generate_names_blob(global_myname(), lp_workgroup());
 207
 208                 if (!SMBNTLMv2encrypt(name_user, name_domain,
 209                                       state->request.data.auth.pass,
 210                                       &server_chal,
 211                                       &names_blob,
 212                                       &lm_response, &nt_response, NULL)) {
 213                         data_blob_free(&names_blob);
 214                         data_blob_free(&server_chal);
 215                         DEBUG(0, ("winbindd_pam_auth: SMBNTLMv2encrypt() failed!\n"));
 216                         result = NT_STATUS_NO_MEMORY;
 217                         goto done;
 218                 }
 219                 data_blob_free(&names_blob);
 220                 data_blob_free(&server_chal);
 221                 lm_resp = data_blob_talloc(mem_ctx, lm_response.data, lm_response.length);
 222                 nt_resp = data_blob_talloc(mem_ctx, nt_response.data, nt_response.length);
 223                 data_blob_free(&lm_response);
 224                 data_blob_free(&nt_response);
 225
 226         } else {
 227                 if (lp_client_lanman_auth()
 228                     && SMBencrypt(state->request.data.auth.pass,
 229                                   chal,
 230                                   local_lm_response)) {
 231                         lm_resp = data_blob_talloc(mem_ctx,
 232                                                    local_lm_response,
 233                                                    sizeof(local_lm_response));
 234                 } else {
 235                         lm_resp = data_blob(NULL, 0);
 236                 }
 237                 SMBNTencrypt(state->request.data.auth.pass,
 238                              chal,
 239                              local_nt_response);
 240
 241                 nt_resp = data_blob_talloc(mem_ctx,
 242                                            local_nt_response,
 243                                            sizeof(local_nt_response));
 244         }
 245
 246
 247         /* what domain should we contact? */
 248
 249         if ( IS_DC ) {
 250                 if (!(contact_domain = find_domain_from_name(name_domain))) {
 251                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
 252                                   state->request.data.auth.user, name_domain, name_user, name_domain));
 253                         result = NT_STATUS_NO_SUCH_USER;
 254                         goto done;
 255                 }
 256
 257         } else {
 258                 if (is_myname(name_domain)) {
 259                         DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
 260                         result =  NT_STATUS_NO_SUCH_USER;
 261                         goto done;
 262                 }
 263
 264                 if (!(contact_domain = find_our_domain())) {
 265                         DEBUG(1, ("Authentication for [%s] -> [%s]\\[%s] in our domain failed - we can't find our domain!\n",
 266                                   state->request.data.auth.user, name_domain, name_user));
 267                         result = NT_STATUS_NO_SUCH_USER;
 268                         goto done;
 269                 }
 270         }
 271
 272         if ( !get_trust_pw(contact_domain->name, trust_passwd, &last_change_time, &sec_channel_type) ) {
 273                 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 274                 goto done;
 275         }
 276
 277         /* check authentication loop */
 278
 279         do {
 280                 ZERO_STRUCT(info3);
 281                 ZERO_STRUCT(ret_creds);
 282                 retry = False;
 283
 284                 /* Don't shut this down - it belongs to the connection cache code */
 285                 result = cm_get_netlogon_cli(contact_domain, trust_passwd,
 286                                              sec_channel_type, False, &cli);
 287
 288                 if (!NT_STATUS_IS_OK(result)) {
 289                         DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
 290                         goto done;
 291                 }
 292
 293                 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 294                                                         &ret_creds,
 295                                                         name_user, name_domain,
 296                                                         global_myname(), chal,
 297                                                         lm_resp, nt_resp,
 298                                                         &info3);
 299                 attempts += 1;
 300
 301                 /* We have to try a second time as cm_get_netlogon_cli
 302                    might not yet have noticed that the DC has killed
 303                    our connection. */
 304
 305                 if ( cli->fd == -1 ) {
 306                         retry = True;
 307                         continue;
 308                 }
 309
 310                 /* if we get access denied, a possible cuase was that we had and open
 311                    connection to the DC, but someone changed our machine account password
 312                    out from underneath us using 'net rpc changetrustpw' */
 313
 314                 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
 315                         DEBUG(3,("winbindd_pam_auth: sam_logon returned ACCESS_DENIED.  Maybe the trust account "
 316                                 "password was changed and we didn't know it.  Killing connections to domain %s\n",
 317                                 name_domain));
 318                         winbindd_cm_flush();
 319                         retry = True;
 320                         cli = NULL;
 321                 }
 322
 323         } while ( (attempts < 2) && retry );
 324
 325         if (cli != NULL) {
 326                 /* We might have come out of the loop above with cli == NULL,
 327                    so don't dereference that. */
 328                 clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
 329         }
 330
 331         if (NT_STATUS_IS_OK(result)) {
 332                 netsamlogon_cache_store( cli->mem_ctx, name_user, &info3 );
 333                 wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
 334
 335                 /* Check if the user is in the right group */
 336
 337                 if (!NT_STATUS_IS_OK(result = check_info3_in_group(mem_ctx, &info3, state->request.data.auth.require_membership_of_sid))) {
 338                         DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
 339                                   state->request.data.auth.user,
 340                                   state->request.data.auth.require_membership_of_sid));
 341                 }
 342         }
 343
 344 done:
 345         /* give us a more useful (more correct?) error code */
 346         if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
 347                 result = NT_STATUS_NO_LOGON_SERVERS;
 348         }
 349
 350         state->response.data.auth.nt_status = NT_STATUS_V(result);
 351         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
 352
 353         /* we might have given a more useful error above */
 354         if (!*state->response.data.auth.error_string)
 355                 fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
 356         state->response.data.auth.pam_error = nt_status_to_pam(result);
 357
 358         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n",
 359               state->request.data.auth.user,
 360               state->response.data.auth.nt_status_string,
 361               state->response.data.auth.pam_error));
 362
 363         if ( NT_STATUS_IS_OK(result) &&
 364              (state->request.flags & WBFLAG_PAM_AFS_TOKEN) ) {
 365
 366                 char *afsname = strdup(lp_afs_username_map());
 367                 char *cell;
 368
 369                 if (afsname == NULL) goto no_token;
 370
 371                 afsname = realloc_string_sub(afsname, "%D", name_domain);
 372                 afsname = realloc_string_sub(afsname, "%u", name_user);
 373                 afsname = realloc_string_sub(afsname, "%U", name_user);
 374
 375                 if (afsname == NULL) goto no_token;
 376
 377                 strlower_m(afsname);
 378
 379                 cell = strchr(afsname, '@');
 380
 381                 if (cell == NULL) goto no_token;
 382
 383                 *cell = '\0';
 384                 cell += 1;
 385
 386                 /* Append an AFS token string */
 387                 state->response.extra_data =
 388                         afs_createtoken_str(afsname, cell);
 389
 390                 if (state->response.extra_data != NULL)
 391                         state->response.length +=
 392                                 strlen(state->response.extra_data)+1;
 393
 394         no_token:
 395                 SAFE_FREE(afsname);
 396         }
 397
 398         if (mem_ctx)
 399                 talloc_destroy(mem_ctx);
 400
 401         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 402 }
 403
 404 /**********************************************************************
 405  Challenge Response Authentication Protocol
 406 **********************************************************************/
 407
 408 enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
 409 {
 410         NTSTATUS result;
 411         unsigned char trust_passwd[16];
 412         time_t last_change_time;
 413         uint32 sec_channel_type;
 414         NET_USER_INFO_3 info3;
 415         struct cli_state *cli = NULL;
 416         TALLOC_CTX *mem_ctx = NULL;
 417         const char *name_user = NULL;
 418         const char *name_domain = NULL;
 419         const char *workstation;
 420         struct winbindd_domain *contact_domain;
 421         DOM_CRED ret_creds;
 422         int attempts = 0;
 423         BOOL retry;
 424
 425         DATA_BLOB lm_resp, nt_resp;
 426
 427         if (!state->privileged) {
 428                 char *error_string = NULL;
 429                 DEBUG(2, ("winbindd_pam_auth_crap: non-privileged access denied.  !\n"));
 430                 DEBUGADD(2, ("winbindd_pam_auth_crap: Ensure permissions on %s are set correctly.\n",
 431                              get_winbind_priv_pipe_dir()));
 432                 /* send a better message than ACCESS_DENIED */
 433                 asprintf(&error_string, "winbind client not authorized to use winbindd_pam_auth_crap.  Ensure permissions on %s are set correctly.",
 434                          get_winbind_priv_pipe_dir());
 435                 fstrcpy(state->response.data.auth.error_string, error_string);
 436                 SAFE_FREE(error_string);
 437                 result =  NT_STATUS_ACCESS_DENIED;
 438                 goto done;
 439         }
 440
 441         /* Ensure null termination */
 442         state->request.data.auth_crap.user[sizeof(state->request.data.auth_crap.user)-1]=0;
 443         state->request.data.auth_crap.domain[sizeof(state->request.data.auth_crap.domain)-1]=0;
 444
 445         if (!(mem_ctx = talloc_init("winbind pam auth crap for %s", state->request.data.auth_crap.user))) {
 446                 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
 447                 result = NT_STATUS_NO_MEMORY;
 448                 goto done;
 449         }
 450
 451         name_user = state->request.data.auth_crap.user;
 452
 453         if (*state->request.data.auth_crap.domain) {
 454                 name_domain = state->request.data.auth_crap.domain;
 455         } else if (lp_winbind_use_default_domain()) {
 456                 name_domain = lp_workgroup();
 457         } else {
 458                 DEBUG(5,("no domain specified with username (%s) - failing auth\n",
 459                          name_user));
 460                 result = NT_STATUS_NO_SUCH_USER;
 461                 goto done;
 462         }
 463
 464         DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid,
 465                   name_domain, name_user));
 466
 467         if (*state->request.data.auth_crap.workstation) {
 468                 workstation = state->request.data.auth_crap.workstation;
 469         } else {
 470                 workstation = global_myname();
 471         }
 472
 473         if (state->request.data.auth_crap.lm_resp_len > sizeof(state->request.data.auth_crap.lm_resp)
 474                 || state->request.data.auth_crap.nt_resp_len > sizeof(state->request.data.auth_crap.nt_resp)) {
 475                 DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n",
 476                           state->request.data.auth_crap.lm_resp_len,
 477                           state->request.data.auth_crap.nt_resp_len));
 478                 result = NT_STATUS_INVALID_PARAMETER;
 479                 goto done;
 480         }
 481
 482         lm_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
 483         nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
 484
 485
 486         /* what domain should we contact? */
 487
 488         if ( IS_DC ) {
 489                 if (!(contact_domain = find_domain_from_name(name_domain))) {
 490                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
 491                                   state->request.data.auth_crap.user, name_domain, name_user, name_domain));
 492                         result = NT_STATUS_NO_SUCH_USER;
 493                         goto done;
 494                 }
 495
 496         } else {
 497                 if (is_myname(name_domain)) {
 498                         DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
 499                         result =  NT_STATUS_NO_SUCH_USER;
 500                         goto done;
 501                 }
 502
 503                 if (!(contact_domain = find_our_domain())) {
 504                         DEBUG(1, ("Authenticatoin for [%s] -> [%s]\\[%s] in our domain failed - we can't find our domain!\n",
 505                                   state->request.data.auth_crap.user, name_domain, name_user));
 506                         result = NT_STATUS_NO_SUCH_USER;
 507                         goto done;
 508                 }
 509         }
 510
 511         if ( !get_trust_pw(contact_domain->name, trust_passwd, &last_change_time, &sec_channel_type) ) {
 512                 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 513                 goto done;
 514         }
 515
 516         do {
 517                 ZERO_STRUCT(info3);
 518                 ZERO_STRUCT(ret_creds);
 519                 retry = False;
 520
 521                 /* Don't shut this down - it belongs to the connection cache code */
 522                 result = cm_get_netlogon_cli(contact_domain, trust_passwd, sec_channel_type, False, &cli);
 523
 524                 if (!NT_STATUS_IS_OK(result)) {
 525                         DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n",
 526                                   nt_errstr(result)));
 527                         goto done;
 528                 }
 529
 530                 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 531                                                         &ret_creds,
 532                                                         name_user, name_domain,
 533                                                         workstation,
 534                                                         state->request.data.auth_crap.chal,
 535                                                         lm_resp, nt_resp,
 536                                                         &info3);
 537
 538                 attempts += 1;
 539
 540                 /* We have to try a second time as cm_get_netlogon_cli
 541                    might not yet have noticed that the DC has killed
 542                    our connection. */
 543
 544                 if ( cli->fd == -1 ) {
 545                         retry = True;
 546                         continue;
 547                 }
 548
 549                 /* if we get access denied, a possible cause was that we had and open
 550                    connection to the DC, but someone changed our machine account password
 551                    out from underneath us using 'net rpc changetrustpw' */
 552
 553                 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
 554                         DEBUG(3,("winbindd_pam_auth_crap: sam_logon returned ACCESS_DENIED.  Maybe the trust account "
 555                                 "password was changed and we didn't know it.  Killing connections to domain %s\n",
 556                                 contact_domain->name));
 557                         winbindd_cm_flush();
 558                         retry = True;
 559                         cli = NULL;
 560                 }
 561
 562         } while ( (attempts < 2) && retry );
 563
 564         if (cli != NULL) {
 565                 /* We might have come out of the loop above with cli == NULL,
 566                    so don't dereference that. */
 567                 clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
 568         }
 569
 570         if (NT_STATUS_IS_OK(result)) {
 571                 netsamlogon_cache_store( cli->mem_ctx, name_user, &info3 );
 572                 wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
 573
 574                 if (!NT_STATUS_IS_OK(result = check_info3_in_group(mem_ctx, &info3, state->request.data.auth_crap.require_membership_of_sid))) {
 575                         DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
 576                                   state->request.data.auth_crap.user,
 577                                   state->request.data.auth_crap.require_membership_of_sid));
 578                         goto done;
 579                 }
 580
 581                 if (state->request.flags & WBFLAG_PAM_INFO3_NDR) {
 582                         result = append_info3_as_ndr(mem_ctx, state, &info3);
 583                 } else if (state->request.flags & WBFLAG_PAM_UNIX_NAME) {
 584                         /* ntlm_auth should return the unix username, per
 585                            'winbind use default domain' settings and the like */
 586
 587                         fstring username_out;
 588                         const char *nt_username, *nt_domain;
 589                         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3.uni_user_name)))) {
 590                                 /* If the server didn't give us one, just use the one we sent them */
 591                                 nt_username = name_user;
 592                         }
 593
 594                         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3.uni_logon_dom)))) {
 595                                 /* If the server didn't give us one, just use the one we sent them */
 596                                 nt_domain = name_domain;
 597                         }
 598
 599                         fill_domain_username(username_out, nt_domain, nt_username);
 600
 601                         DEBUG(5, ("Setting unix username to [%s]\n", username_out));
 602
 603                         state->response.extra_data = strdup(username_out);
 604                         if (!state->response.extra_data) {
 605                                 result = NT_STATUS_NO_MEMORY;
 606                                 goto done;
 607                         }
 608                         state->response.length +=  strlen(state->response.extra_data)+1;
 609                 }
 610
 611                 if (state->request.flags & WBFLAG_PAM_USER_SESSION_KEY) {
 612                         memcpy(state->response.data.auth.user_session_key, info3.user_sess_key, sizeof(state->response.data.auth.user_session_key) /* 16 */);
 613                 }
 614                 if (state->request.flags & WBFLAG_PAM_LMKEY) {
 615                         memcpy(state->response.data.auth.first_8_lm_hash, info3.padding, sizeof(state->response.data.auth.first_8_lm_hash) /* 8 */);
 616                 }
 617         }
 618
 619 done:
 620         /* give us a more useful (more correct?) error code */
 621         if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
 622                 result = NT_STATUS_NO_LOGON_SERVERS;
 623         }
 624
 625         if (state->request.flags & WBFLAG_PAM_NT_STATUS_SQUASH) {
 626                 result = nt_status_squash(result);
 627         }
 628
 629         state->response.data.auth.nt_status = NT_STATUS_V(result);
 630         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
 631
 632         /* we might have given a more useful error above */
 633         if (!*state->response.data.auth.error_string)
 634                 fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
 635         state->response.data.auth.pam_error = nt_status_to_pam(result);
 636
 637         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
 638               ("NTLM CRAP authentication for user [%s]\\[%s] returned %s (PAM: %d)\n",
 639                name_domain,
 640                name_user,
 641                state->response.data.auth.nt_status_string,
 642                state->response.data.auth.pam_error));
 643
 644         if (mem_ctx)
 645                 talloc_destroy(mem_ctx);
 646
 647         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 648 }
 649
 650 /* Change a user password */
 651
 652 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
 653 {
 654         NTSTATUS result;
 655         char *oldpass, *newpass;
 656         fstring domain, user;
 657         CLI_POLICY_HND *hnd;
 658         TALLOC_CTX *mem_ctx;
 659         struct winbindd_domain *contact_domain;
 660
 661         DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)state->pid,
 662                 state->request.data.chauthtok.user));
 663
 664         if (!(mem_ctx = talloc_init("winbind password change for %s",
 665                                     state->request.data.chauthtok.user))) {
 666                 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
 667                 result = NT_STATUS_NO_MEMORY;
 668                 goto done;
 669         }
 670
 671         /* Setup crap */
 672
 673         if (state == NULL)
 674                 return WINBINDD_ERROR;
 675
 676         parse_domain_user(state->request.data.chauthtok.user, domain, user);
 677
 678         if (!(contact_domain = find_domain_from_name(domain))) {
 679                 DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] as %s is not a trusted domain\n",
 680                           state->request.data.chauthtok.user, domain, user, domain));
 681                 result = NT_STATUS_NO_SUCH_USER;
 682                 goto done;
 683         }
 684
 685         /* Change password */
 686
 687         oldpass = state->request.data.chauthtok.oldpass;
 688         newpass = state->request.data.chauthtok.newpass;
 689
 690         /* Get sam handle */
 691
 692         if (!NT_STATUS_IS_OK(result = cm_get_sam_handle(contact_domain, &hnd)) ) {
 693                 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
 694                 goto done;
 695         }
 696
 697         result = cli_samr_chgpasswd_user(hnd->cli, mem_ctx, user, newpass, oldpass);
 698
 699 done:
 700         state->response.data.auth.nt_status = NT_STATUS_V(result);
 701         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
 702         fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
 703         state->response.data.auth.pam_error = nt_status_to_pam(result);
 704
 705         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
 706               ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
 707                domain,
 708                user,
 709                state->response.data.auth.nt_status_string,
 710                state->response.data.auth.pam_error));
 711
 712         if (mem_ctx)
 713                 talloc_destroy(mem_ctx);
 714
 715         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 716 }