source/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 required_membership_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(&required_membership_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[j].g_rid)) {
 112                         DEBUG(3,("could not append additional group rid 0x%x\n",
 113                                 info3->gids[j].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; j++) {
 127                 sid_copy(&all_sids[info3->num_groups2 + i + 2],
 128                          &info3->other_sids[j].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(&required_membership_sid, &all_sids[i])) {
 137                         DEBUG(10, ("SID %s matches %s - user permitted to authenticate!\n",
 138                                    sid_to_string(sid1, &required_membership_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         generate_random_buffer(chal, 8, False);
 194         SMBencrypt(state->request.data.auth.pass, chal, local_lm_response);
 195
 196         SMBNTencrypt(state->request.data.auth.pass, chal, local_nt_response);
 197
 198         lm_resp = data_blob_talloc(mem_ctx, local_lm_response, sizeof(local_lm_response));
 199         nt_resp = data_blob_talloc(mem_ctx, local_nt_response, sizeof(local_nt_response));
 200
 201         /* what domain should we contact? */
 202
 203         if ( IS_DC ) {
 204                 if (!(contact_domain = find_domain_from_name(name_domain))) {
 205                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
 206                                   state->request.data.auth.user, name_domain, name_user, name_domain));
 207                         result = NT_STATUS_NO_SUCH_USER;
 208                         goto done;
 209                 }
 210
 211         } else {
 212                 if (is_myname(name_domain)) {
 213                         DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
 214                         result =  NT_STATUS_NO_SUCH_USER;
 215                         goto done;
 216                 }
 217
 218                 if (!(contact_domain = find_our_domain())) {
 219                         DEBUG(1, ("Authentication for [%s] -> [%s]\\[%s] in our domain failed - we can't find our domain!\n",
 220                                   state->request.data.auth.user, name_domain, name_user));
 221                         result = NT_STATUS_NO_SUCH_USER;
 222                         goto done;
 223                 }
 224         }
 225
 226         if ( !get_trust_pw(contact_domain->name, trust_passwd, &last_change_time, &sec_channel_type) ) {
 227                 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 228                 goto done;
 229         }
 230
 231         /* check authentication loop */
 232
 233         do {
 234                 ZERO_STRUCT(info3);
 235                 ZERO_STRUCT(ret_creds);
 236                 retry = False;
 237
 238                 /* Don't shut this down - it belongs to the connection cache code */
 239                 result = cm_get_netlogon_cli(contact_domain, trust_passwd,
 240                                              sec_channel_type, False, &cli);
 241
 242                 if (!NT_STATUS_IS_OK(result)) {
 243                         DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
 244                         goto done;
 245                 }
 246
 247                 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 248                                                         &ret_creds,
 249                                                         name_user, name_domain,
 250                                                         global_myname(), chal,
 251                                                         lm_resp, nt_resp,
 252                                                         &info3);
 253                 attempts += 1;
 254
 255                 /* We have to try a second time as cm_get_netlogon_cli
 256                    might not yet have noticed that the DC has killed
 257                    our connection. */
 258
 259                 if ( cli->fd == -1 ) {
 260                         retry = True;
 261                         continue;
 262                 }
 263
 264                 /* if we get access denied, a possible cuase was that we had and open
 265                    connection to the DC, but someone changed our machine account password
 266                    out from underneath us using 'net rpc changetrustpw' */
 267
 268                 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
 269                         DEBUG(3,("winbindd_pam_auth: sam_logon returned ACCESS_DENIED.  Maybe the trust account "
 270                                 "password was changed and we didn't know it.  Killing connections to domain %s\n",
 271                                 name_domain));
 272                         winbindd_cm_flush();
 273                         retry = True;
 274                         cli = NULL;
 275                 }
 276
 277         } while ( (attempts < 2) && retry );
 278
 279         if (cli != NULL) {
 280                 /* We might have come out of the loop above with cli == NULL,
 281                    so don't dereference that. */
 282                 clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
 283         }
 284
 285         if (NT_STATUS_IS_OK(result)) {
 286                 netsamlogon_cache_store( cli->mem_ctx, &info3 );
 287                 wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
 288
 289                 /* Check if the user is in the right group */
 290
 291                 if (!NT_STATUS_IS_OK(result = check_info3_in_group(mem_ctx, &info3, state->request.data.auth.required_membership_sid))) {
 292                         DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
 293                                   state->request.data.auth.user,
 294                                   state->request.data.auth.required_membership_sid));
 295                 }
 296         }
 297
 298 done:
 299         /* give us a more useful (more correct?) error code */
 300         if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
 301                 result = NT_STATUS_NO_LOGON_SERVERS;
 302         }
 303
 304         state->response.data.auth.nt_status = NT_STATUS_V(result);
 305         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
 306
 307         /* we might have given a more useful error above */
 308         if (!*state->response.data.auth.error_string)
 309                 fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
 310         state->response.data.auth.pam_error = nt_status_to_pam(result);
 311
 312         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n",
 313               state->request.data.auth.user,
 314               state->response.data.auth.nt_status_string,
 315               state->response.data.auth.pam_error));
 316
 317         if ( NT_STATUS_IS_OK(result) &&
 318              (state->request.flags & WBFLAG_PAM_AFS_TOKEN) ) {
 319
 320                 char *afsname = strdup(lp_afs_username_map());
 321                 char *cell;
 322
 323                 if (afsname == NULL) goto no_token;
 324
 325                 afsname = realloc_string_sub(afsname, "%D", name_domain);
 326                 afsname = realloc_string_sub(afsname, "%u", name_user);
 327                 afsname = realloc_string_sub(afsname, "%U", name_user);
 328
 329                 if (afsname == NULL) goto no_token;
 330
 331                 strlower_m(afsname);
 332
 333                 cell = strchr(afsname, '@');
 334
 335                 if (cell == NULL) goto no_token;
 336
 337                 *cell = '\0';
 338                 cell += 1;
 339
 340                 /* Append an AFS token string */
 341                 state->response.extra_data =
 342                         afs_createtoken_str(afsname, cell);
 343
 344                 if (state->response.extra_data != NULL)
 345                         state->response.length +=
 346                                 strlen(state->response.extra_data)+1;
 347
 348         no_token:
 349                 SAFE_FREE(afsname);
 350         }
 351
 352         if (mem_ctx)
 353                 talloc_destroy(mem_ctx);
 354
 355         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 356 }
 357
 358 /**********************************************************************
 359  Challenge Response Authentication Protocol
 360 **********************************************************************/
 361
 362 enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
 363 {
 364         NTSTATUS result;
 365         unsigned char trust_passwd[16];
 366         time_t last_change_time;
 367         uint32 sec_channel_type;
 368         NET_USER_INFO_3 info3;
 369         struct cli_state *cli = NULL;
 370         TALLOC_CTX *mem_ctx = NULL;
 371         char *name_user = NULL;
 372         const char *name_domain = NULL;
 373         const char *workstation;
 374         struct winbindd_domain *contact_domain;
 375         DOM_CRED ret_creds;
 376         int attempts = 0;
 377         BOOL retry;
 378
 379         DATA_BLOB lm_resp, nt_resp;
 380
 381         if (!state->privileged) {
 382                 char *error_string = NULL;
 383                 DEBUG(2, ("winbindd_pam_auth_crap: non-privileged access denied.  !\n"));
 384                 DEBUGADD(2, ("winbindd_pam_auth_crap: Ensure permissions on %s are set correctly.\n",
 385                              get_winbind_priv_pipe_dir()));
 386                 /* send a better message than ACCESS_DENIED */
 387                 asprintf(&error_string, "winbind client not authorized to use winbindd_pam_auth_crap.  Ensure permissions on %s are set correctly.",
 388                          get_winbind_priv_pipe_dir());
 389                 push_utf8_fstring(state->response.data.auth.error_string, error_string);
 390                 SAFE_FREE(error_string);
 391                 result =  NT_STATUS_ACCESS_DENIED;
 392                 goto done;
 393         }
 394
 395         /* Ensure null termination */
 396         state->request.data.auth_crap.user[sizeof(state->request.data.auth_crap.user)-1]=0;
 397         state->request.data.auth_crap.domain[sizeof(state->request.data.auth_crap.domain)-1]=0;
 398
 399         if (!(mem_ctx = talloc_init("winbind pam auth crap for (utf8) %s", state->request.data.auth_crap.user))) {
 400                 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
 401                 result = NT_STATUS_NO_MEMORY;
 402                 goto done;
 403         }
 404
 405         if (pull_utf8_talloc(mem_ctx, &name_user, state->request.data.auth_crap.user) == (size_t)-1) {
 406                 DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
 407                 result = NT_STATUS_UNSUCCESSFUL;
 408                 goto done;
 409         }
 410
 411         if (*state->request.data.auth_crap.domain) {
 412                 char *dom = NULL;
 413                 if (pull_utf8_talloc(mem_ctx, &dom, state->request.data.auth_crap.domain) == (size_t)-1) {
 414                         DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
 415                         result = NT_STATUS_UNSUCCESSFUL;
 416                         goto done;
 417                 }
 418                 name_domain = dom;
 419         } else if (lp_winbind_use_default_domain()) {
 420                 name_domain = lp_workgroup();
 421         } else {
 422                 DEBUG(5,("no domain specified with username (%s) - failing auth\n",
 423                          name_user));
 424                 result = NT_STATUS_NO_SUCH_USER;
 425                 goto done;
 426         }
 427
 428         DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid,
 429                   name_domain, name_user));
 430
 431         if (*state->request.data.auth_crap.workstation) {
 432                 char *wrk = NULL;
 433                 if (pull_utf8_talloc(mem_ctx, &wrk, state->request.data.auth_crap.workstation) == (size_t)-1) {
 434                         DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
 435                         result = NT_STATUS_UNSUCCESSFUL;
 436                         goto done;
 437                 }
 438                 workstation = wrk;
 439         } else {
 440                 workstation = global_myname();
 441         }
 442
 443         if (state->request.data.auth_crap.lm_resp_len > sizeof(state->request.data.auth_crap.lm_resp)
 444                 || state->request.data.auth_crap.nt_resp_len > sizeof(state->request.data.auth_crap.nt_resp)) {
 445                 DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n",
 446                           state->request.data.auth_crap.lm_resp_len,
 447                           state->request.data.auth_crap.nt_resp_len));
 448                 result = NT_STATUS_INVALID_PARAMETER;
 449                 goto done;
 450         }
 451
 452         lm_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
 453         nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
 454
 455
 456         /* what domain should we contact? */
 457
 458         if ( IS_DC ) {
 459                 if (!(contact_domain = find_domain_from_name(name_domain))) {
 460                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
 461                                   state->request.data.auth_crap.user, name_domain, name_user, name_domain));
 462                         result = NT_STATUS_NO_SUCH_USER;
 463                         goto done;
 464                 }
 465
 466         } else {
 467                 if (is_myname(name_domain)) {
 468                         DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
 469                         result =  NT_STATUS_NO_SUCH_USER;
 470                         goto done;
 471                 }
 472
 473                 if (!(contact_domain = find_our_domain())) {
 474                         DEBUG(1, ("Authenticatoin for [%s] -> [%s]\\[%s] in our domain failed - we can't find our domain!\n",
 475                                   state->request.data.auth_crap.user, name_domain, name_user));
 476                         result = NT_STATUS_NO_SUCH_USER;
 477                         goto done;
 478                 }
 479         }
 480
 481         if ( !get_trust_pw(contact_domain->name, trust_passwd, &last_change_time, &sec_channel_type) ) {
 482                 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 483                 goto done;
 484         }
 485
 486         do {
 487                 ZERO_STRUCT(info3);
 488                 ZERO_STRUCT(ret_creds);
 489                 retry = False;
 490
 491                 /* Don't shut this down - it belongs to the connection cache code */
 492                 result = cm_get_netlogon_cli(contact_domain, trust_passwd, sec_channel_type, False, &cli);
 493
 494                 if (!NT_STATUS_IS_OK(result)) {
 495                         DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n",
 496                                   nt_errstr(result)));
 497                         goto done;
 498                 }
 499
 500                 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 501                                                         &ret_creds,
 502                                                         name_user, name_domain,
 503                                                         workstation,
 504                                                         state->request.data.auth_crap.chal,
 505                                                         lm_resp, nt_resp,
 506                                                         &info3);
 507
 508                 attempts += 1;
 509
 510                 /* We have to try a second time as cm_get_netlogon_cli
 511                    might not yet have noticed that the DC has killed
 512                    our connection. */
 513
 514                 if ( cli->fd == -1 ) {
 515                         retry = True;
 516                         continue;
 517                 }
 518
 519                 /* if we get access denied, a possible cause was that we had and open
 520                    connection to the DC, but someone changed our machine account password
 521                    out from underneath us using 'net rpc changetrustpw' */
 522
 523                 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
 524                         DEBUG(3,("winbindd_pam_auth_crap: sam_logon returned ACCESS_DENIED.  Maybe the trust account "
 525                                 "password was changed and we didn't know it.  Killing connections to domain %s\n",
 526                                 contact_domain->name));
 527                         winbindd_cm_flush();
 528                         retry = True;
 529                         cli = NULL;
 530                 }
 531
 532         } while ( (attempts < 2) && retry );
 533
 534         if (cli != NULL) {
 535                 /* We might have come out of the loop above with cli == NULL,
 536                    so don't dereference that. */
 537                 clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
 538         }
 539
 540         if (NT_STATUS_IS_OK(result)) {
 541                 netsamlogon_cache_store( cli->mem_ctx, &info3 );
 542                 wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
 543
 544                 if (!NT_STATUS_IS_OK(result = check_info3_in_group(mem_ctx, &info3, state->request.data.auth_crap.required_membership_sid))) {
 545                         DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
 546                                   state->request.data.auth_crap.user,
 547                                   state->request.data.auth_crap.required_membership_sid));
 548                         goto done;
 549                 }
 550
 551                 if (state->request.flags & WBFLAG_PAM_INFO3_NDR) {
 552                         result = append_info3_as_ndr(mem_ctx, state, &info3);
 553                 } else if (state->request.flags & WBFLAG_PAM_UNIX_NAME) {
 554                         /* ntlm_auth should return the unix username, per
 555                            'winbind use default domain' settings and the like */
 556
 557                         fstring username_out;
 558                         const char *nt_username, *nt_domain;
 559                         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3.uni_user_name)))) {
 560                                 /* If the server didn't give us one, just use the one we sent them */
 561                                 nt_username = name_user;
 562                         }
 563
 564                         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3.uni_logon_dom)))) {
 565                                 /* If the server didn't give us one, just use the one we sent them */
 566                                 nt_domain = name_domain;
 567                         }
 568
 569                         fill_domain_username(username_out, nt_domain, nt_username);
 570
 571                         DEBUG(5, ("Setting unix username to [%s]\n", username_out));
 572
 573                         /* this interface is in UTF8 */
 574                         if (push_utf8_allocate((char **)&state->response.extra_data, username_out) == -1) {
 575                                 result = NT_STATUS_NO_MEMORY;
 576                                 goto done;
 577                         }
 578                         state->response.length +=  strlen(state->response.extra_data)+1;
 579                 }
 580
 581                 if (state->request.flags & WBFLAG_PAM_USER_SESSION_KEY) {
 582                         memcpy(state->response.data.auth.user_session_key, info3.user_sess_key, sizeof(state->response.data.auth.user_session_key) /* 16 */);
 583                 }
 584                 if (state->request.flags & WBFLAG_PAM_LMKEY) {
 585                         memcpy(state->response.data.auth.first_8_lm_hash, info3.padding, sizeof(state->response.data.auth.first_8_lm_hash) /* 8 */);
 586                 }
 587         }
 588
 589 done:
 590         /* give us a more useful (more correct?) error code */
 591         if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
 592                 result = NT_STATUS_NO_LOGON_SERVERS;
 593         }
 594
 595         if (state->request.flags & WBFLAG_PAM_NT_STATUS_SQUASH) {
 596                 result = nt_status_squash(result);
 597         }
 598
 599         state->response.data.auth.nt_status = NT_STATUS_V(result);
 600         push_utf8_fstring(state->response.data.auth.nt_status_string, nt_errstr(result));
 601
 602         /* we might have given a more useful error above */
 603         if (!*state->response.data.auth.error_string)
 604                 push_utf8_fstring(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
 605         state->response.data.auth.pam_error = nt_status_to_pam(result);
 606
 607         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
 608               ("NTLM CRAP authentication for user [%s]\\[%s] returned %s (PAM: %d)\n",
 609                name_domain,
 610                name_user,
 611                state->response.data.auth.nt_status_string,
 612                state->response.data.auth.pam_error));
 613
 614         if (mem_ctx)
 615                 talloc_destroy(mem_ctx);
 616
 617         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 618 }
 619
 620 /* Change a user password */
 621
 622 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
 623 {
 624         NTSTATUS result;
 625         char *oldpass, *newpass;
 626         fstring domain, user;
 627         CLI_POLICY_HND *hnd;
 628         TALLOC_CTX *mem_ctx;
 629         struct winbindd_domain *contact_domain;
 630
 631         DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)state->pid,
 632                 state->request.data.chauthtok.user));
 633
 634         if (!(mem_ctx = talloc_init("winbind password change for (utf8) %s",
 635                                     state->request.data.chauthtok.user))) {
 636                 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
 637                 result = NT_STATUS_NO_MEMORY;
 638                 goto done;
 639         }
 640
 641         /* Setup crap */
 642
 643         if (state == NULL)
 644                 return WINBINDD_ERROR;
 645
 646         parse_domain_user(state->request.data.chauthtok.user, domain, user);
 647
 648         if (!(contact_domain = find_domain_from_name(domain))) {
 649                 DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] as %s is not a trusted domain\n",
 650                           state->request.data.chauthtok.user, domain, user, domain));
 651                 result = NT_STATUS_NO_SUCH_USER;
 652                 goto done;
 653         }
 654
 655         /* Change password */
 656
 657         oldpass = state->request.data.chauthtok.oldpass;
 658         newpass = state->request.data.chauthtok.newpass;
 659
 660         /* Get sam handle */
 661
 662         if (!NT_STATUS_IS_OK(result = cm_get_sam_handle(contact_domain, &hnd)) ) {
 663                 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
 664                 goto done;
 665         }
 666
 667         result = cli_samr_chgpasswd_user(hnd->cli, mem_ctx, user, newpass, oldpass);
 668
 669 done:
 670         state->response.data.auth.nt_status = NT_STATUS_V(result);
 671         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
 672         fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
 673         state->response.data.auth.pam_error = nt_status_to_pam(result);
 674
 675         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
 676               ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
 677                domain,
 678                user,
 679                state->response.data.auth.nt_status_string,
 680                state->response.data.auth.pam_error));
 681
 682         if (mem_ctx)
 683                 talloc_destroy(mem_ctx);
 684
 685         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 686 }