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         prs_copy_all_data_out(state->response.extra_data, &ps);
  52         state->response.length += size;
  53         prs_mem_free(&ps);
  54         return NT_STATUS_OK;
  55 }
  56
  57 static NTSTATUS check_info3_in_group(TALLOC_CTX *mem_ctx,
  58                                      NET_USER_INFO_3 *info3,
  59                                      const char *group_sid)
  60 {
  61         DOM_SID required_membership_sid;
  62         DOM_SID *all_sids;
  63         size_t num_all_sids = (2 + info3->num_groups2 + info3->num_other_sids);
  64         size_t i, j = 0;
  65
  66         /* Parse the 'required group' SID */
  67
  68         if (!group_sid || !group_sid[0]) {
  69                 /* NO sid supplied, all users may access */
  70                 return NT_STATUS_OK;
  71         }
  72
  73         if (!string_to_sid(&required_membership_sid, group_sid)) {
  74                 DEBUG(0, ("winbindd_pam_auth: could not parse %s as a SID!",
  75                           group_sid));
  76
  77                 return NT_STATUS_INVALID_PARAMETER;
  78         }
  79
  80         all_sids = talloc(mem_ctx, sizeof(DOM_SID) * num_all_sids);
  81         if (!all_sids)
  82                 return NT_STATUS_NO_MEMORY;
  83
  84         /* and create (by appending rids) the 'domain' sids */
  85
  86         sid_copy(&all_sids[0], &(info3->dom_sid.sid));
  87
  88         if (!sid_append_rid(&all_sids[0], info3->user_rid)) {
  89                 DEBUG(3,("could not append user's primary RID 0x%x\n",
  90                          info3->user_rid));
  91
  92                 return NT_STATUS_INVALID_PARAMETER;
  93         }
  94         j++;
  95
  96         sid_copy(&all_sids[1], &(info3->dom_sid.sid));
  97
  98         if (!sid_append_rid(&all_sids[1], info3->group_rid)) {
  99                 DEBUG(3,("could not append additional group rid 0x%x\n",
 100                          info3->group_rid));
 101
 102                 return NT_STATUS_INVALID_PARAMETER;
 103         }
 104         j++;
 105
 106         for (i = 0; i < info3->num_groups2; i++) {
 107
 108                 sid_copy(&all_sids[j], &(info3->dom_sid.sid));
 109
 110                 if (!sid_append_rid(&all_sids[j], info3->gids[j].g_rid)) {
 111                         DEBUG(3,("could not append additional group rid 0x%x\n",
 112                                 info3->gids[j].g_rid));
 113
 114                         return NT_STATUS_INVALID_PARAMETER;
 115                 }
 116                 j++;
 117         }
 118
 119         /* Copy 'other' sids.  We need to do sid filtering here to
 120            prevent possible elevation of privileges.  See:
 121
 122            http://www.microsoft.com/windows2000/techinfo/administration/security/sidfilter.asp
 123          */
 124
 125         for (i = 0; i < info3->num_other_sids; j++) {
 126                 sid_copy(&all_sids[info3->num_groups2 + i + 2],
 127                          &info3->other_sids[j].sid);
 128                 j++;
 129         }
 130
 131         for (i = 0; i < j; i++) {
 132                 fstring sid1, sid2;
 133                 DEBUG(10, ("User has SID: %s\n",
 134                            sid_to_string(sid1, &all_sids[i])));
 135                 if (sid_equal(&required_membership_sid, &all_sids[i])) {
 136                         DEBUG(10, ("SID %s matches %s - user permitted to authenticate!\n",
 137                                    sid_to_string(sid1, &required_membership_sid), sid_to_string(sid2, &all_sids[i])));
 138                         return NT_STATUS_OK;
 139                 }
 140         }
 141
 142         /* Do not distinguish this error from a wrong username/pw */
 143
 144         return NT_STATUS_LOGON_FAILURE;
 145 }
 146
 147 /**********************************************************************
 148  Authenticate a user with a clear text password
 149 **********************************************************************/
 150
 151 enum winbindd_result winbindd_pam_auth(struct winbindd_cli_state *state)
 152 {
 153         NTSTATUS result;
 154         fstring name_domain, name_user;
 155         unsigned char trust_passwd[16];
 156         time_t last_change_time;
 157         uint32 sec_channel_type;
 158         NET_USER_INFO_3 info3;
 159         struct cli_state *cli = NULL;
 160         uchar chal[8];
 161         TALLOC_CTX *mem_ctx = NULL;
 162         DATA_BLOB lm_resp;
 163         DATA_BLOB nt_resp;
 164         DOM_CRED ret_creds;
 165         int attempts = 0;
 166         unsigned char local_lm_response[24];
 167         unsigned char local_nt_response[24];
 168         struct winbindd_domain *contact_domain;
 169         BOOL retry;
 170
 171         /* Ensure null termination */
 172         state->request.data.auth.user[sizeof(state->request.data.auth.user)-1]='\0';
 173
 174         /* Ensure null termination */
 175         state->request.data.auth.pass[sizeof(state->request.data.auth.pass)-1]='\0';
 176
 177         DEBUG(3, ("[%5lu]: pam auth %s\n", (unsigned long)state->pid,
 178                   state->request.data.auth.user));
 179
 180         if (!(mem_ctx = talloc_init("winbind pam auth for %s", state->request.data.auth.user))) {
 181                 DEBUG(0, ("winbindd_pam_auth: could not talloc_init()!\n"));
 182                 result = NT_STATUS_NO_MEMORY;
 183                 goto done;
 184         }
 185
 186         /* Parse domain and username */
 187
 188         parse_domain_user(state->request.data.auth.user, name_domain, name_user);
 189
 190         /* do password magic */
 191
 192         generate_random_buffer(chal, 8, False);
 193         SMBencrypt(state->request.data.auth.pass, chal, local_lm_response);
 194
 195         SMBNTencrypt(state->request.data.auth.pass, chal, local_nt_response);
 196
 197         lm_resp = data_blob_talloc(mem_ctx, local_lm_response, sizeof(local_lm_response));
 198         nt_resp = data_blob_talloc(mem_ctx, local_nt_response, sizeof(local_nt_response));
 199
 200         /* what domain should we contact? */
 201
 202         if ( IS_DC ) {
 203                 if (!(contact_domain = find_domain_from_name(name_domain))) {
 204                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
 205                                   state->request.data.auth.user, name_domain, name_user, name_domain));
 206                         result = NT_STATUS_NO_SUCH_USER;
 207                         goto done;
 208                 }
 209
 210         } else {
 211                 if (is_myname(name_domain)) {
 212                         DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
 213                         result =  NT_STATUS_NO_SUCH_USER;
 214                         goto done;
 215                 }
 216
 217                 if (!(contact_domain = find_our_domain())) {
 218                         DEBUG(1, ("Authentication for [%s] -> [%s]\\[%s] in our domain failed - we can't find our domain!\n",
 219                                   state->request.data.auth.user, name_domain, name_user));
 220                         result = NT_STATUS_NO_SUCH_USER;
 221                         goto done;
 222                 }
 223         }
 224
 225         if ( !get_trust_pw(contact_domain->name, trust_passwd, &last_change_time, &sec_channel_type) ) {
 226                 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 227                 goto done;
 228         }
 229
 230         /* check authentication loop */
 231
 232         do {
 233                 ZERO_STRUCT(info3);
 234                 ZERO_STRUCT(ret_creds);
 235                 retry = False;
 236
 237                 /* Don't shut this down - it belongs to the connection cache code */
 238                 result = cm_get_netlogon_cli(contact_domain, trust_passwd,
 239                                              sec_channel_type, False, &cli);
 240
 241                 if (!NT_STATUS_IS_OK(result)) {
 242                         DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
 243                         goto done;
 244                 }
 245
 246                 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 247                                                         &ret_creds,
 248                                                         name_user, name_domain,
 249                                                         global_myname(), chal,
 250                                                         lm_resp, nt_resp,
 251                                                         &info3);
 252                 attempts += 1;
 253
 254                 /* We have to try a second time as cm_get_netlogon_cli
 255                    might not yet have noticed that the DC has killed
 256                    our connection. */
 257
 258                 if ( cli->fd == -1 ) {
 259                         retry = True;
 260                         continue;
 261                 }
 262
 263                 /* if we get access denied, a possible cuase was that we had and open
 264                    connection to the DC, but someone changed our machine account password
 265                    out from underneath us using 'net rpc changetrustpw' */
 266
 267                 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
 268                         DEBUG(3,("winbindd_pam_auth: sam_logon returned ACCESS_DENIED.  Maybe the trust account "
 269                                 "password was changed and we didn't know it.  Killing connections to domain %s\n",
 270                                 name_domain));
 271                         winbindd_cm_flush();
 272                         retry = True;
 273                         cli = NULL;
 274                 }
 275
 276         } while ( (attempts < 2) && retry );
 277
 278         if (cli != NULL) {
 279                 /* We might have come out of the loop above with cli == NULL,
 280                    so don't dereference that. */
 281                 clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
 282         }
 283
 284         if (NT_STATUS_IS_OK(result)) {
 285                 netsamlogon_cache_store( cli->mem_ctx, &info3 );
 286                 wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
 287
 288                 /* Check if the user is in the right group */
 289
 290                 if (!NT_STATUS_IS_OK(result = check_info3_in_group(mem_ctx, &info3, state->request.data.auth.required_membership_sid))) {
 291                         DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
 292                                   state->request.data.auth.user,
 293                                   state->request.data.auth.required_membership_sid));
 294                 }
 295         }
 296
 297 done:
 298         /* give us a more useful (more correct?) error code */
 299         if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
 300                 result = NT_STATUS_NO_LOGON_SERVERS;
 301         }
 302
 303         state->response.data.auth.nt_status = NT_STATUS_V(result);
 304         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
 305
 306         /* we might have given a more useful error above */
 307         if (!*state->response.data.auth.error_string)
 308                 fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
 309         state->response.data.auth.pam_error = nt_status_to_pam(result);
 310
 311         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n",
 312               state->request.data.auth.user,
 313               state->response.data.auth.nt_status_string,
 314               state->response.data.auth.pam_error));
 315
 316         if ( NT_STATUS_IS_OK(result) &&
 317              (state->request.flags & WBFLAG_PAM_AFS_TOKEN) ) {
 318
 319                 char *afsname = strdup(lp_afs_username_map());
 320                 char *cell;
 321
 322                 if (afsname == NULL) goto no_token;
 323
 324                 afsname = realloc_string_sub(afsname, "%D", name_domain);
 325                 afsname = realloc_string_sub(afsname, "%u", name_user);
 326                 afsname = realloc_string_sub(afsname, "%U", name_user);
 327
 328                 if (afsname == NULL) goto no_token;
 329
 330                 strlower_m(afsname);
 331
 332                 cell = strchr(afsname, '@');
 333
 334                 if (cell == NULL) goto no_token;
 335
 336                 *cell = '\0';
 337                 cell += 1;
 338
 339                 /* Append an AFS token string */
 340                 state->response.extra_data =
 341                         afs_createtoken_str(afsname, cell);
 342
 343                 if (state->response.extra_data != NULL)
 344                         state->response.length +=
 345                                 strlen(state->response.extra_data)+1;
 346
 347         no_token:
 348                 SAFE_FREE(afsname);
 349         }
 350
 351         if (mem_ctx)
 352                 talloc_destroy(mem_ctx);
 353
 354         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 355 }
 356
 357 /**********************************************************************
 358  Challenge Response Authentication Protocol
 359 **********************************************************************/
 360
 361 enum winbindd_result winbindd_pam_auth_crap(struct winbindd_cli_state *state)
 362 {
 363         NTSTATUS result;
 364         unsigned char trust_passwd[16];
 365         time_t last_change_time;
 366         uint32 sec_channel_type;
 367         NET_USER_INFO_3 info3;
 368         struct cli_state *cli = NULL;
 369         TALLOC_CTX *mem_ctx = NULL;
 370         char *name_user = NULL;
 371         const char *name_domain = NULL;
 372         const char *workstation;
 373         struct winbindd_domain *contact_domain;
 374         DOM_CRED ret_creds;
 375         int attempts = 0;
 376         BOOL retry;
 377
 378         DATA_BLOB lm_resp, nt_resp;
 379
 380         if (!state->privileged) {
 381                 char *error_string = NULL;
 382                 DEBUG(2, ("winbindd_pam_auth_crap: non-privileged access denied.  !\n"));
 383                 DEBUGADD(2, ("winbindd_pam_auth_crap: Ensure permissions on %s are set correctly.\n",
 384                              get_winbind_priv_pipe_dir()));
 385                 /* send a better message than ACCESS_DENIED */
 386                 asprintf(&error_string, "winbind client not authorized to use winbindd_pam_auth_crap.  Ensure permissions on %s are set correctly.",
 387                          get_winbind_priv_pipe_dir());
 388                 push_utf8_fstring(state->response.data.auth.error_string, error_string);
 389                 SAFE_FREE(error_string);
 390                 result =  NT_STATUS_ACCESS_DENIED;
 391                 goto done;
 392         }
 393
 394         /* Ensure null termination */
 395         state->request.data.auth_crap.user[sizeof(state->request.data.auth_crap.user)-1]=0;
 396         state->request.data.auth_crap.domain[sizeof(state->request.data.auth_crap.domain)-1]=0;
 397
 398         if (!(mem_ctx = talloc_init("winbind pam auth crap for (utf8) %s", state->request.data.auth_crap.user))) {
 399                 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
 400                 result = NT_STATUS_NO_MEMORY;
 401                 goto done;
 402         }
 403
 404         if (pull_utf8_talloc(mem_ctx, &name_user, state->request.data.auth_crap.user) == (size_t)-1) {
 405                 DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
 406                 result = NT_STATUS_UNSUCCESSFUL;
 407                 goto done;
 408         }
 409
 410         if (*state->request.data.auth_crap.domain) {
 411                 char *dom = NULL;
 412                 if (pull_utf8_talloc(mem_ctx, &dom, state->request.data.auth_crap.domain) == (size_t)-1) {
 413                         DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
 414                         result = NT_STATUS_UNSUCCESSFUL;
 415                         goto done;
 416                 }
 417                 name_domain = dom;
 418         } else if (lp_winbind_use_default_domain()) {
 419                 name_domain = lp_workgroup();
 420         } else {
 421                 DEBUG(5,("no domain specified with username (%s) - failing auth\n",
 422                          name_user));
 423                 result = NT_STATUS_NO_SUCH_USER;
 424                 goto done;
 425         }
 426
 427         DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid,
 428                   name_domain, name_user));
 429
 430         if (*state->request.data.auth_crap.workstation) {
 431                 char *wrk = NULL;
 432                 if (pull_utf8_talloc(mem_ctx, &wrk, state->request.data.auth_crap.workstation) == (size_t)-1) {
 433                         DEBUG(0, ("winbindd_pam_auth_crap: pull_utf8_talloc failed!\n"));
 434                         result = NT_STATUS_UNSUCCESSFUL;
 435                         goto done;
 436                 }
 437                 workstation = wrk;
 438         } else {
 439                 workstation = global_myname();
 440         }
 441
 442         if (state->request.data.auth_crap.lm_resp_len > sizeof(state->request.data.auth_crap.lm_resp)
 443                 || state->request.data.auth_crap.nt_resp_len > sizeof(state->request.data.auth_crap.nt_resp)) {
 444                 DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n",
 445                           state->request.data.auth_crap.lm_resp_len,
 446                           state->request.data.auth_crap.nt_resp_len));
 447                 result = NT_STATUS_INVALID_PARAMETER;
 448                 goto done;
 449         }
 450
 451         lm_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.lm_resp, state->request.data.auth_crap.lm_resp_len);
 452         nt_resp = data_blob_talloc(mem_ctx, state->request.data.auth_crap.nt_resp, state->request.data.auth_crap.nt_resp_len);
 453
 454
 455         /* what domain should we contact? */
 456
 457         if ( IS_DC ) {
 458                 if (!(contact_domain = find_domain_from_name(name_domain))) {
 459                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
 460                                   state->request.data.auth_crap.user, name_domain, name_user, name_domain));
 461                         result = NT_STATUS_NO_SUCH_USER;
 462                         goto done;
 463                 }
 464
 465         } else {
 466                 if (is_myname(name_domain)) {
 467                         DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
 468                         result =  NT_STATUS_NO_SUCH_USER;
 469                         goto done;
 470                 }
 471
 472                 if (!(contact_domain = find_our_domain())) {
 473                         DEBUG(1, ("Authenticatoin for [%s] -> [%s]\\[%s] in our domain failed - we can't find our domain!\n",
 474                                   state->request.data.auth_crap.user, name_domain, name_user));
 475                         result = NT_STATUS_NO_SUCH_USER;
 476                         goto done;
 477                 }
 478         }
 479
 480         if ( !get_trust_pw(contact_domain->name, trust_passwd, &last_change_time, &sec_channel_type) ) {
 481                 result = NT_STATUS_CANT_ACCESS_DOMAIN_INFO;
 482                 goto done;
 483         }
 484
 485         do {
 486                 ZERO_STRUCT(info3);
 487                 ZERO_STRUCT(ret_creds);
 488                 retry = False;
 489
 490                 /* Don't shut this down - it belongs to the connection cache code */
 491                 result = cm_get_netlogon_cli(contact_domain, trust_passwd, sec_channel_type, False, &cli);
 492
 493                 if (!NT_STATUS_IS_OK(result)) {
 494                         DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n",
 495                                   nt_errstr(result)));
 496                         goto done;
 497                 }
 498
 499                 result = cli_netlogon_sam_network_logon(cli, mem_ctx,
 500                                                         &ret_creds,
 501                                                         name_user, name_domain,
 502                                                         workstation,
 503                                                         state->request.data.auth_crap.chal,
 504                                                         lm_resp, nt_resp,
 505                                                         &info3);
 506
 507                 attempts += 1;
 508
 509                 /* We have to try a second time as cm_get_netlogon_cli
 510                    might not yet have noticed that the DC has killed
 511                    our connection. */
 512
 513                 if ( cli->fd == -1 ) {
 514                         retry = True;
 515                         continue;
 516                 }
 517
 518                 /* if we get access denied, a possible cause was that we had and open
 519                    connection to the DC, but someone changed our machine account password
 520                    out from underneath us using 'net rpc changetrustpw' */
 521
 522                 if ( NT_STATUS_V(result) == NT_STATUS_V(NT_STATUS_ACCESS_DENIED) ) {
 523                         DEBUG(3,("winbindd_pam_auth_crap: sam_logon returned ACCESS_DENIED.  Maybe the trust account "
 524                                 "password was changed and we didn't know it.  Killing connections to domain %s\n",
 525                                 contact_domain->name));
 526                         winbindd_cm_flush();
 527                         retry = True;
 528                         cli = NULL;
 529                 }
 530
 531         } while ( (attempts < 2) && retry );
 532
 533         clnt_deal_with_creds(cli->sess_key, &(cli->clnt_cred), &ret_creds);
 534
 535         if (NT_STATUS_IS_OK(result)) {
 536                 netsamlogon_cache_store( cli->mem_ctx, &info3 );
 537                 wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
 538
 539                 if (!NT_STATUS_IS_OK(result = check_info3_in_group(mem_ctx, &info3, state->request.data.auth_crap.required_membership_sid))) {
 540                         DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
 541                                   state->request.data.auth_crap.user,
 542                                   state->request.data.auth_crap.required_membership_sid));
 543                         goto done;
 544                 }
 545
 546                 if (state->request.flags & WBFLAG_PAM_INFO3_NDR) {
 547                         result = append_info3_as_ndr(mem_ctx, state, &info3);
 548                 } else if (state->request.flags & WBFLAG_PAM_UNIX_NAME) {
 549                         /* ntlm_auth should return the unix username, per
 550                            'winbind use default domain' settings and the like */
 551
 552                         fstring username_out;
 553                         const char *nt_username, *nt_domain;
 554                         if (!(nt_username = unistr2_tdup(mem_ctx, &(info3.uni_user_name)))) {
 555                                 /* If the server didn't give us one, just use the one we sent them */
 556                                 nt_username = name_user;
 557                         }
 558
 559                         if (!(nt_domain = unistr2_tdup(mem_ctx, &(info3.uni_logon_dom)))) {
 560                                 /* If the server didn't give us one, just use the one we sent them */
 561                                 nt_domain = name_domain;
 562                         }
 563
 564                         fill_domain_username(username_out, nt_domain, nt_username);
 565
 566                         DEBUG(5, ("Setting unix username to [%s]\n", username_out));
 567
 568                         /* this interface is in UTF8 */
 569                         if (push_utf8_allocate((char **)&state->response.extra_data, username_out) == -1) {
 570                                 result = NT_STATUS_NO_MEMORY;
 571                                 goto done;
 572                         }
 573                         state->response.length +=  strlen(state->response.extra_data)+1;
 574                 }
 575
 576                 if (state->request.flags & WBFLAG_PAM_USER_SESSION_KEY) {
 577                         memcpy(state->response.data.auth.user_session_key, info3.user_sess_key, sizeof(state->response.data.auth.user_session_key) /* 16 */);
 578                 }
 579                 if (state->request.flags & WBFLAG_PAM_LMKEY) {
 580                         memcpy(state->response.data.auth.first_8_lm_hash, info3.padding, sizeof(state->response.data.auth.first_8_lm_hash) /* 8 */);
 581                 }
 582         }
 583
 584 done:
 585         /* give us a more useful (more correct?) error code */
 586         if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) || (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
 587                 result = NT_STATUS_NO_LOGON_SERVERS;
 588         }
 589
 590         if (state->request.flags & WBFLAG_PAM_NT_STATUS_SQUASH) {
 591                 result = nt_status_squash(result);
 592         }
 593
 594         state->response.data.auth.nt_status = NT_STATUS_V(result);
 595         push_utf8_fstring(state->response.data.auth.nt_status_string, nt_errstr(result));
 596
 597         /* we might have given a more useful error above */
 598         if (!*state->response.data.auth.error_string)
 599                 push_utf8_fstring(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
 600         state->response.data.auth.pam_error = nt_status_to_pam(result);
 601
 602         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
 603               ("NTLM CRAP authentication for user [%s]\\[%s] returned %s (PAM: %d)\n",
 604                name_domain,
 605                name_user,
 606                state->response.data.auth.nt_status_string,
 607                state->response.data.auth.pam_error));
 608
 609         if (mem_ctx)
 610                 talloc_destroy(mem_ctx);
 611
 612         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 613 }
 614
 615 /* Change a user password */
 616
 617 enum winbindd_result winbindd_pam_chauthtok(struct winbindd_cli_state *state)
 618 {
 619         NTSTATUS result;
 620         char *oldpass, *newpass;
 621         fstring domain, user;
 622         CLI_POLICY_HND *hnd;
 623         TALLOC_CTX *mem_ctx;
 624         struct winbindd_domain *contact_domain;
 625
 626         DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)state->pid,
 627                 state->request.data.chauthtok.user));
 628
 629         if (!(mem_ctx = talloc_init("winbind password change for (utf8) %s",
 630                                     state->request.data.chauthtok.user))) {
 631                 DEBUG(0, ("winbindd_pam_auth_crap: could not talloc_init()!\n"));
 632                 result = NT_STATUS_NO_MEMORY;
 633                 goto done;
 634         }
 635
 636         /* Setup crap */
 637
 638         if (state == NULL)
 639                 return WINBINDD_ERROR;
 640
 641         parse_domain_user(state->request.data.chauthtok.user, domain, user);
 642
 643         if (!(contact_domain = find_domain_from_name(domain))) {
 644                 DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] as %s is not a trusted domain\n",
 645                           state->request.data.chauthtok.user, domain, user, domain));
 646                 result = NT_STATUS_NO_SUCH_USER;
 647                 goto done;
 648         }
 649
 650         /* Change password */
 651
 652         oldpass = state->request.data.chauthtok.oldpass;
 653         newpass = state->request.data.chauthtok.newpass;
 654
 655         /* Get sam handle */
 656
 657         if (!NT_STATUS_IS_OK(result = cm_get_sam_handle(contact_domain, &hnd)) ) {
 658                 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
 659                 goto done;
 660         }
 661
 662         result = cli_samr_chgpasswd_user(hnd->cli, mem_ctx, user, newpass, oldpass);
 663
 664 done:
 665         state->response.data.auth.nt_status = NT_STATUS_V(result);
 666         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
 667         fstrcpy(state->response.data.auth.error_string, nt_errstr(result));
 668         state->response.data.auth.pam_error = nt_status_to_pam(result);
 669
 670         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
 671               ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
 672                domain,
 673                user,
 674                state->response.data.auth.nt_status_string,
 675                state->response.data.auth.pam_error));
 676
 677         if (mem_ctx)
 678                 talloc_destroy(mem_ctx);
 679
 680         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
 681 }