source3/winbindd/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    Copyright (C) Guenther Deschner 2005
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "winbindd.h"
  27 #undef DBGC_CLASS
  28 #define DBGC_CLASS DBGC_WINBIND
  29
  30 static NTSTATUS append_info3_as_txt(TALLOC_CTX *mem_ctx,
  31                                     struct winbindd_cli_state *state,
  32                                     NET_USER_INFO_3 *info3)
  33 {
  34         fstring str_sid;
  35
  36         state->response.data.auth.info3.logon_time =
  37                 nt_time_to_unix(info3->logon_time);
  38         state->response.data.auth.info3.logoff_time =
  39                 nt_time_to_unix(info3->logoff_time);
  40         state->response.data.auth.info3.kickoff_time =
  41                 nt_time_to_unix(info3->kickoff_time);
  42         state->response.data.auth.info3.pass_last_set_time =
  43                 nt_time_to_unix(info3->pass_last_set_time);
  44         state->response.data.auth.info3.pass_can_change_time =
  45                 nt_time_to_unix(info3->pass_can_change_time);
  46         state->response.data.auth.info3.pass_must_change_time =
  47                 nt_time_to_unix(info3->pass_must_change_time);
  48
  49         state->response.data.auth.info3.logon_count = info3->logon_count;
  50         state->response.data.auth.info3.bad_pw_count = info3->bad_pw_count;
  51
  52         state->response.data.auth.info3.user_rid = info3->user_rid;
  53         state->response.data.auth.info3.group_rid = info3->group_rid;
  54         sid_to_string(str_sid, &(info3->dom_sid.sid));
  55         fstrcpy(state->response.data.auth.info3.dom_sid, str_sid);
  56
  57         state->response.data.auth.info3.num_groups = info3->num_groups;
  58         state->response.data.auth.info3.user_flgs = info3->user_flgs;
  59
  60         state->response.data.auth.info3.acct_flags = info3->acct_flags;
  61         state->response.data.auth.info3.num_other_sids = info3->num_other_sids;
  62
  63         unistr2_to_ascii(state->response.data.auth.info3.user_name,
  64                 &info3->uni_user_name,
  65                 sizeof(state->response.data.auth.info3.user_name));
  66         unistr2_to_ascii(state->response.data.auth.info3.full_name,
  67                 &info3->uni_full_name,
  68                 sizeof(state->response.data.auth.info3.full_name));
  69         unistr2_to_ascii(state->response.data.auth.info3.logon_script,
  70                 &info3->uni_logon_script,
  71                 sizeof(state->response.data.auth.info3.logon_script));
  72         unistr2_to_ascii(state->response.data.auth.info3.profile_path,
  73                 &info3->uni_profile_path,
  74                 sizeof(state->response.data.auth.info3.profile_path));
  75         unistr2_to_ascii(state->response.data.auth.info3.home_dir,
  76                 &info3->uni_home_dir,
  77                 sizeof(state->response.data.auth.info3.home_dir));
  78         unistr2_to_ascii(state->response.data.auth.info3.dir_drive,
  79                 &info3->uni_dir_drive,
  80                 sizeof(state->response.data.auth.info3.dir_drive));
  81
  82         unistr2_to_ascii(state->response.data.auth.info3.logon_srv,
  83                 &info3->uni_logon_srv,
  84                 sizeof(state->response.data.auth.info3.logon_srv));
  85         unistr2_to_ascii(state->response.data.auth.info3.logon_dom,
  86                 &info3->uni_logon_dom,
  87                 sizeof(state->response.data.auth.info3.logon_dom));
  88
  89         return NT_STATUS_OK;
  90 }
  91
  92 static NTSTATUS append_info3_as_ndr(TALLOC_CTX *mem_ctx,
  93                                     struct winbindd_cli_state *state,
  94                                     NET_USER_INFO_3 *info3)
  95 {
  96         prs_struct ps;
  97         uint32 size;
  98         if (!prs_init(&ps, 256 /* Random, non-zero number */, mem_ctx, MARSHALL)) {
  99                 return NT_STATUS_NO_MEMORY;
 100         }
 101         if (!net_io_user_info3("", info3, &ps, 1, 3, False)) {
 102                 prs_mem_free(&ps);
 103                 return NT_STATUS_UNSUCCESSFUL;
 104         }
 105
 106         size = prs_data_size(&ps);
 107         SAFE_FREE(state->response.extra_data.data);
 108         state->response.extra_data.data = SMB_MALLOC(size);
 109         if (!state->response.extra_data.data) {
 110                 prs_mem_free(&ps);
 111                 return NT_STATUS_NO_MEMORY;
 112         }
 113         memset( state->response.extra_data.data, '\0', size );
 114         prs_copy_all_data_out((char *)state->response.extra_data.data, &ps);
 115         state->response.length += size;
 116         prs_mem_free(&ps);
 117         return NT_STATUS_OK;
 118 }
 119
 120 static NTSTATUS append_unix_username(TALLOC_CTX *mem_ctx,
 121                                      struct winbindd_cli_state *state,
 122                                      const NET_USER_INFO_3 *info3,
 123                                      const char *name_domain,
 124                                      const char *name_user)
 125 {
 126         /* We've been asked to return the unix username, per
 127            'winbind use default domain' settings and the like */
 128
 129         fstring username_out;
 130         const char *nt_username, *nt_domain;
 131
 132         if (!(nt_domain = unistr2_to_ascii_talloc(mem_ctx,
 133                                        &info3->uni_logon_dom))) {
 134                 /* If the server didn't give us one, just use the one
 135                  * we sent them */
 136                 nt_domain = name_domain;
 137         }
 138
 139         if (!(nt_username = unistr2_to_ascii_talloc(mem_ctx,
 140                                          &info3->uni_user_name))) {
 141                 /* If the server didn't give us one, just use the one
 142                  * we sent them */
 143                 nt_username = name_user;
 144         }
 145
 146         fill_domain_username(username_out, nt_domain, nt_username,
 147                              True);
 148
 149         DEBUG(5,("Setting unix username to [%s]\n", username_out));
 150
 151         SAFE_FREE(state->response.extra_data.data);
 152         state->response.extra_data.data = SMB_STRDUP(username_out);
 153         if (!state->response.extra_data.data) {
 154                 return NT_STATUS_NO_MEMORY;
 155         }
 156         state->response.length +=
 157                 strlen((const char *)state->response.extra_data.data)+1;
 158
 159         return NT_STATUS_OK;
 160 }
 161
 162 static NTSTATUS append_afs_token(TALLOC_CTX *mem_ctx,
 163                                  struct winbindd_cli_state *state,
 164                                  const NET_USER_INFO_3 *info3,
 165                                  const char *name_domain,
 166                                  const char *name_user)
 167 {
 168         char *afsname = NULL;
 169         char *cell;
 170
 171         afsname = talloc_strdup(mem_ctx, lp_afs_username_map());
 172         if (afsname == NULL) {
 173                 return NT_STATUS_NO_MEMORY;
 174         }
 175
 176         afsname = talloc_string_sub(mem_ctx,
 177                                     lp_afs_username_map(),
 178                                     "%D", name_domain);
 179         afsname = talloc_string_sub(mem_ctx, afsname,
 180                                     "%u", name_user);
 181         afsname = talloc_string_sub(mem_ctx, afsname,
 182                                     "%U", name_user);
 183
 184         {
 185                 DOM_SID user_sid;
 186                 fstring sidstr;
 187
 188                 sid_copy(&user_sid, &info3->dom_sid.sid);
 189                 sid_append_rid(&user_sid, info3->user_rid);
 190                 sid_to_string(sidstr, &user_sid);
 191                 afsname = talloc_string_sub(mem_ctx, afsname,
 192                                             "%s", sidstr);
 193         }
 194
 195         if (afsname == NULL) {
 196                 return NT_STATUS_NO_MEMORY;
 197         }
 198
 199         strlower_m(afsname);
 200
 201         DEBUG(10, ("Generating token for user %s\n", afsname));
 202
 203         cell = strchr(afsname, '@');
 204
 205         if (cell == NULL) {
 206                 return NT_STATUS_NO_MEMORY;
 207         }
 208
 209         *cell = '\0';
 210         cell += 1;
 211
 212         /* Append an AFS token string */
 213         SAFE_FREE(state->response.extra_data.data);
 214         state->response.extra_data.data =
 215                 afs_createtoken_str(afsname, cell);
 216
 217         if (state->response.extra_data.data != NULL) {
 218                 state->response.length +=
 219                         strlen((const char *)state->response.extra_data.data)+1;
 220         }
 221
 222         return NT_STATUS_OK;
 223 }
 224
 225 static NTSTATUS check_info3_in_group(TALLOC_CTX *mem_ctx,
 226                                      NET_USER_INFO_3 *info3,
 227                                      const char *group_sid)
 228 /**
 229  * Check whether a user belongs to a group or list of groups.
 230  *
 231  * @param mem_ctx talloc memory context.
 232  * @param info3 user information, including group membership info.
 233  * @param group_sid One or more groups , separated by commas.
 234  *
 235  * @return NT_STATUS_OK on success,
 236  *    NT_STATUS_LOGON_FAILURE if the user does not belong,
 237  *    or other NT_STATUS_IS_ERR(status) for other kinds of failure.
 238  */
 239 {
 240         DOM_SID *require_membership_of_sid;
 241         size_t num_require_membership_of_sid;
 242         char *req_sid;
 243         const char *p;
 244         DOM_SID sid;
 245         size_t i;
 246         struct nt_user_token *token;
 247         TALLOC_CTX *frame = NULL;
 248         NTSTATUS status;
 249
 250         /* Parse the 'required group' SID */
 251
 252         if (!group_sid || !group_sid[0]) {
 253                 /* NO sid supplied, all users may access */
 254                 return NT_STATUS_OK;
 255         }
 256
 257         if (!(token = TALLOC_ZERO_P(mem_ctx, struct nt_user_token))) {
 258                 DEBUG(0, ("talloc failed\n"));
 259                 return NT_STATUS_NO_MEMORY;
 260         }
 261
 262         num_require_membership_of_sid = 0;
 263         require_membership_of_sid = NULL;
 264
 265         p = group_sid;
 266
 267         frame = talloc_stackframe();
 268         while (next_token_talloc(frame, &p, &req_sid, ",")) {
 269                 if (!string_to_sid(&sid, req_sid)) {
 270                         DEBUG(0, ("check_info3_in_group: could not parse %s "
 271                                   "as a SID!", req_sid));
 272                         TALLOC_FREE(frame);
 273                         return NT_STATUS_INVALID_PARAMETER;
 274                 }
 275
 276                 if (!add_sid_to_array(mem_ctx, &sid,
 277                                       &require_membership_of_sid,
 278                                       &num_require_membership_of_sid)) {
 279                         DEBUG(0, ("add_sid_to_array failed\n"));
 280                         TALLOC_FREE(frame);
 281                         return NT_STATUS_NO_MEMORY;
 282                 }
 283         }
 284
 285         TALLOC_FREE(frame);
 286
 287         status = sid_array_from_info3(mem_ctx, info3,
 288                                       &token->user_sids,
 289                                       &token->num_sids,
 290                                       True);
 291         if (!NT_STATUS_IS_OK(status)) {
 292                 return status;
 293         }
 294
 295         if (!NT_STATUS_IS_OK(status = add_aliases(get_global_sam_sid(),
 296                                                   token))
 297             || !NT_STATUS_IS_OK(status = add_aliases(&global_sid_Builtin,
 298                                                      token))) {
 299                 DEBUG(3, ("could not add aliases: %s\n",
 300                           nt_errstr(status)));
 301                 return status;
 302         }
 303
 304         debug_nt_user_token(DBGC_CLASS, 10, token);
 305
 306         for (i=0; i<num_require_membership_of_sid; i++) {
 307                 DEBUG(10, ("Checking SID %s\n", sid_string_dbg(
 308                                    &require_membership_of_sid[i])));
 309                 if (nt_token_check_sid(&require_membership_of_sid[i],
 310                                        token)) {
 311                         DEBUG(10, ("Access ok\n"));
 312                         return NT_STATUS_OK;
 313                 }
 314         }
 315
 316         /* Do not distinguish this error from a wrong username/pw */
 317
 318         return NT_STATUS_LOGON_FAILURE;
 319 }
 320
 321 struct winbindd_domain *find_auth_domain(struct winbindd_cli_state *state,
 322                                         const char *domain_name)
 323 {
 324         struct winbindd_domain *domain;
 325
 326         if (IS_DC) {
 327                 domain = find_domain_from_name_noinit(domain_name);
 328                 if (domain == NULL) {
 329                         DEBUG(3, ("Authentication for domain [%s] refused"
 330                                   "as it is not a trusted domain\n",
 331                                   domain_name));
 332                 }
 333                 return domain;
 334         }
 335
 336         if (is_myname(domain_name)) {
 337                 DEBUG(3, ("Authentication for domain %s (local domain "
 338                           "to this server) not supported at this "
 339                           "stage\n", domain_name));
 340                 return NULL;
 341         }
 342
 343         /* we can auth against trusted domains */
 344         if (state->request.flags & WBFLAG_PAM_CONTACT_TRUSTDOM) {
 345                 domain = find_domain_from_name_noinit(domain_name);
 346                 if (domain == NULL) {
 347                         DEBUG(3, ("Authentication for domain [%s] skipped "
 348                                   "as it is not a trusted domain\n",
 349                                   domain_name));
 350                 } else {
 351                         return domain;
 352                 }
 353         }
 354
 355         return find_our_domain();
 356 }
 357
 358 static void set_auth_errors(struct winbindd_response *resp, NTSTATUS result)
 359 {
 360         resp->data.auth.nt_status = NT_STATUS_V(result);
 361         fstrcpy(resp->data.auth.nt_status_string, nt_errstr(result));
 362
 363         /* we might have given a more useful error above */
 364         if (*resp->data.auth.error_string == '\0')
 365                 fstrcpy(resp->data.auth.error_string,
 366                         get_friendly_nt_error_msg(result));
 367         resp->data.auth.pam_error = nt_status_to_pam(result);
 368 }
 369
 370 static NTSTATUS fillup_password_policy(struct winbindd_domain *domain,
 371                                        struct winbindd_cli_state *state)
 372 {
 373         struct winbindd_methods *methods;
 374         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 375         SAM_UNK_INFO_1 password_policy;
 376
 377         if ( !winbindd_can_contact_domain( domain ) ) {
 378                 DEBUG(5,("fillup_password_policy: No inbound trust to "
 379                          "contact domain %s\n", domain->name));
 380                 return NT_STATUS_NOT_SUPPORTED;
 381         }
 382
 383         methods = domain->methods;
 384
 385         status = methods->password_policy(domain, state->mem_ctx, &password_policy);
 386         if (NT_STATUS_IS_ERR(status)) {
 387                 return status;
 388         }
 389
 390         state->response.data.auth.policy.min_length_password =
 391                 password_policy.min_length_password;
 392         state->response.data.auth.policy.password_history =
 393                 password_policy.password_history;
 394         state->response.data.auth.policy.password_properties =
 395                 password_policy.password_properties;
 396         state->response.data.auth.policy.expire =
 397                 nt_time_to_unix_abs(&(password_policy.expire));
 398         state->response.data.auth.policy.min_passwordage =
 399                 nt_time_to_unix_abs(&(password_policy.min_passwordage));
 400
 401         return NT_STATUS_OK;
 402 }
 403
 404 static NTSTATUS get_max_bad_attempts_from_lockout_policy(struct winbindd_domain *domain,
 405                                                          TALLOC_CTX *mem_ctx,
 406                                                          uint16 *max_allowed_bad_attempts)
 407 {
 408         struct winbindd_methods *methods;
 409         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 410         SAM_UNK_INFO_12 lockout_policy;
 411
 412         *max_allowed_bad_attempts = 0;
 413
 414         methods = domain->methods;
 415
 416         status = methods->lockout_policy(domain, mem_ctx, &lockout_policy);
 417         if (NT_STATUS_IS_ERR(status)) {
 418                 return status;
 419         }
 420
 421         *max_allowed_bad_attempts = lockout_policy.bad_attempt_lockout;
 422
 423         return NT_STATUS_OK;
 424 }
 425
 426 static NTSTATUS get_pwd_properties(struct winbindd_domain *domain,
 427                                    TALLOC_CTX *mem_ctx,
 428                                    uint32 *password_properties)
 429 {
 430         struct winbindd_methods *methods;
 431         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 432         SAM_UNK_INFO_1 password_policy;
 433
 434         *password_properties = 0;
 435
 436         methods = domain->methods;
 437
 438         status = methods->password_policy(domain, mem_ctx, &password_policy);
 439         if (NT_STATUS_IS_ERR(status)) {
 440                 return status;
 441         }
 442
 443         *password_properties = password_policy.password_properties;
 444
 445         return NT_STATUS_OK;
 446 }
 447
 448 #ifdef HAVE_KRB5
 449
 450 static const char *generate_krb5_ccache(TALLOC_CTX *mem_ctx,
 451                                         const char *type,
 452                                         uid_t uid,
 453                                         bool *internal_ccache)
 454 {
 455         /* accept FILE and WRFILE as krb5_cc_type from the client and then
 456          * build the full ccname string based on the user's uid here -
 457          * Guenther*/
 458
 459         const char *gen_cc = NULL;
 460
 461         *internal_ccache = True;
 462
 463         if (uid == -1) {
 464                 goto memory_ccache;
 465         }
 466
 467         if (!type || type[0] == '\0') {
 468                 goto memory_ccache;
 469         }
 470
 471         if (strequal(type, "FILE")) {
 472                 gen_cc = talloc_asprintf(mem_ctx, "FILE:/tmp/krb5cc_%d", uid);
 473         } else if (strequal(type, "WRFILE")) {
 474                 gen_cc = talloc_asprintf(mem_ctx, "WRFILE:/tmp/krb5cc_%d", uid);
 475         } else {
 476                 DEBUG(10,("we don't allow to set a %s type ccache\n", type));
 477                 goto memory_ccache;
 478         }
 479
 480         *internal_ccache = False;
 481         goto done;
 482
 483   memory_ccache:
 484         gen_cc = talloc_strdup(mem_ctx, "MEMORY:winbindd_pam_ccache");
 485
 486   done:
 487         if (gen_cc == NULL) {
 488                 DEBUG(0,("out of memory\n"));
 489                 return NULL;
 490         }
 491
 492         DEBUG(10,("using ccache: %s %s\n", gen_cc, *internal_ccache ? "(internal)":""));
 493
 494         return gen_cc;
 495 }
 496
 497 static void setup_return_cc_name(struct winbindd_cli_state *state, const char *cc)
 498 {
 499         const char *type = state->request.data.auth.krb5_cc_type;
 500
 501         state->response.data.auth.krb5ccname[0] = '\0';
 502
 503         if (type[0] == '\0') {
 504                 return;
 505         }
 506
 507         if (!strequal(type, "FILE") &&
 508             !strequal(type, "WRFILE")) {
 509                 DEBUG(10,("won't return krbccname for a %s type ccache\n",
 510                         type));
 511                 return;
 512         }
 513
 514         fstrcpy(state->response.data.auth.krb5ccname, cc);
 515 }
 516
 517 #endif
 518
 519 static uid_t get_uid_from_state(struct winbindd_cli_state *state)
 520 {
 521         uid_t uid = -1;
 522
 523         uid = state->request.data.auth.uid;
 524
 525         if (uid < 0) {
 526                 DEBUG(1,("invalid uid: '%d'\n", uid));
 527                 return -1;
 528         }
 529         return uid;
 530 }
 531
 532 /**********************************************************************
 533  Authenticate a user with a clear text password using Kerberos and fill up
 534  ccache if required
 535  **********************************************************************/
 536
 537 static NTSTATUS winbindd_raw_kerberos_login(struct winbindd_domain *domain,
 538                                             struct winbindd_cli_state *state,
 539                                             NET_USER_INFO_3 **info3)
 540 {
 541 #ifdef HAVE_KRB5
 542         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
 543         krb5_error_code krb5_ret;
 544         const char *cc = NULL;
 545         const char *principal_s = NULL;
 546         const char *service = NULL;
 547         char *realm = NULL;
 548         fstring name_domain, name_user;
 549         time_t ticket_lifetime = 0;
 550         time_t renewal_until = 0;
 551         uid_t uid = -1;
 552         ADS_STRUCT *ads;
 553         time_t time_offset = 0;
 554         bool internal_ccache = True;
 555
 556         ZERO_STRUCTP(info3);
 557
 558         *info3 = NULL;
 559
 560         /* 1st step:
 561          * prepare a krb5_cc_cache string for the user */
 562
 563         uid = get_uid_from_state(state);
 564         if (uid == -1) {
 565                 DEBUG(0,("no valid uid\n"));
 566         }
 567
 568         cc = generate_krb5_ccache(state->mem_ctx,
 569                                   state->request.data.auth.krb5_cc_type,
 570                                   state->request.data.auth.uid,
 571                                   &internal_ccache);
 572         if (cc == NULL) {
 573                 return NT_STATUS_NO_MEMORY;
 574         }
 575
 576
 577         /* 2nd step:
 578          * get kerberos properties */
 579
 580         if (domain->private_data) {
 581                 ads = (ADS_STRUCT *)domain->private_data;
 582                 time_offset = ads->auth.time_offset;
 583         }
 584
 585
 586         /* 3rd step:
 587          * do kerberos auth and setup ccache as the user */
 588
 589         parse_domain_user(state->request.data.auth.user, name_domain, name_user);
 590
 591         realm = domain->alt_name;
 592         strupper_m(realm);
 593
 594         principal_s = talloc_asprintf(state->mem_ctx, "%s@%s", name_user, realm);
 595         if (principal_s == NULL) {
 596                 return NT_STATUS_NO_MEMORY;
 597         }
 598
 599         service = talloc_asprintf(state->mem_ctx, "%s/%s@%s", KRB5_TGS_NAME, realm, realm);
 600         if (service == NULL) {
 601                 return NT_STATUS_NO_MEMORY;
 602         }
 603
 604         /* if this is a user ccache, we need to act as the user to let the krb5
 605          * library handle the chown, etc. */
 606
 607         /************************ ENTERING NON-ROOT **********************/
 608
 609         if (!internal_ccache) {
 610                 set_effective_uid(uid);
 611                 DEBUG(10,("winbindd_raw_kerberos_login: uid is %d\n", uid));
 612         }
 613
 614         result = kerberos_return_info3_from_pac(state->mem_ctx,
 615                                                 principal_s,
 616                                                 state->request.data.auth.pass,
 617                                                 time_offset,
 618                                                 &ticket_lifetime,
 619                                                 &renewal_until,
 620                                                 cc,
 621                                                 True,
 622                                                 True,
 623                                                 WINBINDD_PAM_AUTH_KRB5_RENEW_TIME,
 624                                                 info3);
 625         if (!internal_ccache) {
 626                 gain_root_privilege();
 627         }
 628
 629         /************************ RETURNED TO ROOT **********************/
 630
 631         if (!NT_STATUS_IS_OK(result)) {
 632                 goto failed;
 633         }
 634
 635         DEBUG(10,("winbindd_raw_kerberos_login: winbindd validated ticket of %s\n",
 636                 principal_s));
 637
 638         /* if we had a user's ccache then return that string for the pam
 639          * environment */
 640
 641         if (!internal_ccache) {
 642
 643                 setup_return_cc_name(state, cc);
 644
 645                 result = add_ccache_to_list(principal_s,
 646                                             cc,
 647                                             service,
 648                                             state->request.data.auth.user,
 649                                             realm,
 650                                             uid,
 651                                             time(NULL),
 652                                             ticket_lifetime,
 653                                             renewal_until,
 654                                             False);
 655
 656                 if (!NT_STATUS_IS_OK(result)) {
 657                         DEBUG(10,("winbindd_raw_kerberos_login: failed to add ccache to list: %s\n",
 658                                 nt_errstr(result)));
 659                 }
 660         } else {
 661
 662                 /* need to delete the memory cred cache, it is not used anymore */
 663
 664                 krb5_ret = ads_kdestroy(cc);
 665                 if (krb5_ret) {
 666                         DEBUG(3,("winbindd_raw_kerberos_login: "
 667                                  "could not destroy krb5 credential cache: "
 668                                  "%s\n", error_message(krb5_ret)));
 669                 }
 670
 671         }
 672
 673         return NT_STATUS_OK;
 674
 675 failed:
 676
 677         /* we could have created a new credential cache with a valid tgt in it
 678          * but we werent able to get or verify the service ticket for this
 679          * local host and therefor didn't get the PAC, we need to remove that
 680          * cache entirely now */
 681
 682         krb5_ret = ads_kdestroy(cc);
 683         if (krb5_ret) {
 684                 DEBUG(3,("winbindd_raw_kerberos_login: "
 685                          "could not destroy krb5 credential cache: "
 686                          "%s\n", error_message(krb5_ret)));
 687         }
 688
 689         if (!NT_STATUS_IS_OK(remove_ccache(state->request.data.auth.user))) {
 690                 DEBUG(3,("winbindd_raw_kerberos_login: "
 691                           "could not remove ccache for user %s\n",
 692                         state->request.data.auth.user));
 693         }
 694
 695         return result;
 696 #else
 697         return NT_STATUS_NOT_SUPPORTED;
 698 #endif /* HAVE_KRB5 */
 699 }
 700
 701 /****************************************************************
 702 ****************************************************************/
 703
 704 static bool check_request_flags(uint32_t flags)
 705 {
 706         uint32_t flags_edata = WBFLAG_PAM_AFS_TOKEN |
 707                                WBFLAG_PAM_UNIX_NAME |
 708                                WBFLAG_PAM_INFO3_NDR;
 709
 710         if ( ( (flags & flags_edata) == WBFLAG_PAM_AFS_TOKEN) ||
 711              ( (flags & flags_edata) == WBFLAG_PAM_INFO3_NDR) ||
 712              ( (flags & flags_edata) == WBFLAG_PAM_UNIX_NAME) ||
 713               !(flags & flags_edata) ) {
 714                 return True;
 715         }
 716
 717         DEBUG(1,("check_request_flags: invalid request flags\n"));
 718
 719         return False;
 720 }
 721
 722 /****************************************************************
 723 ****************************************************************/
 724
 725 static NTSTATUS append_data(struct winbindd_cli_state *state,
 726                             NET_USER_INFO_3 *info3,
 727                             const char *name_domain,
 728                             const char *name_user)
 729 {
 730         NTSTATUS result;
 731         uint32_t flags = state->request.flags;
 732
 733         if (flags & WBFLAG_PAM_USER_SESSION_KEY) {
 734                 memcpy(state->response.data.auth.user_session_key,
 735                        info3->user_sess_key,
 736                        sizeof(state->response.data.auth.user_session_key)
 737                        /* 16 */);
 738         }
 739
 740         if (flags & WBFLAG_PAM_LMKEY) {
 741                 memcpy(state->response.data.auth.first_8_lm_hash,
 742                        info3->lm_sess_key,
 743                        sizeof(state->response.data.auth.first_8_lm_hash)
 744                        /* 8 */);
 745         }
 746
 747         if (flags & WBFLAG_PAM_INFO3_TEXT) {
 748                 result = append_info3_as_txt(state->mem_ctx, state, info3);
 749                 if (!NT_STATUS_IS_OK(result)) {
 750                         DEBUG(10,("Failed to append INFO3 (TXT): %s\n",
 751                                 nt_errstr(result)));
 752                         return result;
 753                 }
 754         }
 755
 756         /* currently, anything from here on potentially overwrites extra_data. */
 757
 758         if (flags & WBFLAG_PAM_INFO3_NDR) {
 759                 result = append_info3_as_ndr(state->mem_ctx, state, info3);
 760                 if (!NT_STATUS_IS_OK(result)) {
 761                         DEBUG(10,("Failed to append INFO3 (NDR): %s\n",
 762                                 nt_errstr(result)));
 763                         return result;
 764                 }
 765         }
 766
 767         if (flags & WBFLAG_PAM_UNIX_NAME) {
 768                 result = append_unix_username(state->mem_ctx, state, info3,
 769                                               name_domain, name_user);
 770                 if (!NT_STATUS_IS_OK(result)) {
 771                         DEBUG(10,("Failed to append Unix Username: %s\n",
 772                                 nt_errstr(result)));
 773                         return result;
 774                 }
 775         }
 776
 777         if (flags & WBFLAG_PAM_AFS_TOKEN) {
 778                 result = append_afs_token(state->mem_ctx, state, info3,
 779                                           name_domain, name_user);
 780                 if (!NT_STATUS_IS_OK(result)) {
 781                         DEBUG(10,("Failed to append AFS token: %s\n",
 782                                 nt_errstr(result)));
 783                         return result;
 784                 }
 785         }
 786
 787         return NT_STATUS_OK;
 788 }
 789
 790 void winbindd_pam_auth(struct winbindd_cli_state *state)
 791 {
 792         struct winbindd_domain *domain;
 793         fstring name_domain, name_user;
 794         NTSTATUS result;
 795
 796         /* Ensure null termination */
 797         state->request.data.auth.user
 798                 [sizeof(state->request.data.auth.user)-1]='\0';
 799
 800         /* Ensure null termination */
 801         state->request.data.auth.pass
 802                 [sizeof(state->request.data.auth.pass)-1]='\0';
 803
 804         DEBUG(3, ("[%5lu]: pam auth %s\n", (unsigned long)state->pid,
 805                   state->request.data.auth.user));
 806
 807         if (!check_request_flags(state->request.flags)) {
 808                 result = NT_STATUS_INVALID_PARAMETER_MIX;
 809                 goto done;
 810         }
 811
 812         /* Parse domain and username */
 813
 814         ws_name_return( state->request.data.auth.user, WB_REPLACE_CHAR );
 815
 816         if (!canonicalize_username(state->request.data.auth.user,
 817                                name_domain, name_user)) {
 818                 result = NT_STATUS_NO_SUCH_USER;
 819                 goto done;
 820         }
 821
 822         domain = find_auth_domain(state, name_domain);
 823
 824         if (domain == NULL) {
 825                 result = NT_STATUS_NO_SUCH_USER;
 826                 goto done;
 827         }
 828
 829         sendto_domain(state, domain);
 830         return;
 831  done:
 832         set_auth_errors(&state->response, result);
 833         DEBUG(5, ("Plain text authentication for %s returned %s "
 834                   "(PAM: %d)\n",
 835                   state->request.data.auth.user,
 836                   state->response.data.auth.nt_status_string,
 837                   state->response.data.auth.pam_error));
 838         request_error(state);
 839 }
 840
 841 NTSTATUS winbindd_dual_pam_auth_cached(struct winbindd_domain *domain,
 842                                        struct winbindd_cli_state *state,
 843                                        NET_USER_INFO_3 **info3)
 844 {
 845         NTSTATUS result = NT_STATUS_LOGON_FAILURE;
 846         uint16 max_allowed_bad_attempts;
 847         fstring name_domain, name_user;
 848         DOM_SID sid;
 849         enum lsa_SidType type;
 850         uchar new_nt_pass[NT_HASH_LEN];
 851         const uint8 *cached_nt_pass;
 852         const uint8 *cached_salt;
 853         NET_USER_INFO_3 *my_info3;
 854         time_t kickoff_time, must_change_time;
 855         bool password_good = False;
 856 #ifdef HAVE_KRB5
 857         struct winbindd_tdc_domain *tdc_domain = NULL;
 858 #endif
 859
 860         *info3 = NULL;
 861
 862         ZERO_STRUCTP(info3);
 863
 864         DEBUG(10,("winbindd_dual_pam_auth_cached\n"));
 865
 866         /* Parse domain and username */
 867
 868         parse_domain_user(state->request.data.auth.user, name_domain, name_user);
 869
 870
 871         if (!lookup_cached_name(state->mem_ctx,
 872                                 name_domain,
 873                                 name_user,
 874                                 &sid,
 875                                 &type)) {
 876                 DEBUG(10,("winbindd_dual_pam_auth_cached: no such user in the cache\n"));
 877                 return NT_STATUS_NO_SUCH_USER;
 878         }
 879
 880         if (type != SID_NAME_USER) {
 881                 DEBUG(10,("winbindd_dual_pam_auth_cached: not a user (%s)\n", sid_type_lookup(type)));
 882                 return NT_STATUS_LOGON_FAILURE;
 883         }
 884
 885         result = winbindd_get_creds(domain,
 886                                     state->mem_ctx,
 887                                     &sid,
 888                                     &my_info3,
 889                                     &cached_nt_pass,
 890                                     &cached_salt);
 891         if (!NT_STATUS_IS_OK(result)) {
 892                 DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get creds: %s\n", nt_errstr(result)));
 893                 return result;
 894         }
 895
 896         *info3 = my_info3;
 897
 898         E_md4hash(state->request.data.auth.pass, new_nt_pass);
 899
 900         dump_data_pw("new_nt_pass", new_nt_pass, NT_HASH_LEN);
 901         dump_data_pw("cached_nt_pass", cached_nt_pass, NT_HASH_LEN);
 902         if (cached_salt) {
 903                 dump_data_pw("cached_salt", cached_salt, NT_HASH_LEN);
 904         }
 905
 906         if (cached_salt) {
 907                 /* In this case we didn't store the nt_hash itself,
 908                    but the MD5 combination of salt + nt_hash. */
 909                 uchar salted_hash[NT_HASH_LEN];
 910                 E_md5hash(cached_salt, new_nt_pass, salted_hash);
 911
 912                 password_good = (memcmp(cached_nt_pass, salted_hash, NT_HASH_LEN) == 0) ?
 913                         True : False;
 914         } else {
 915                 /* Old cached cred - direct store of nt_hash (bad bad bad !). */
 916                 password_good = (memcmp(cached_nt_pass, new_nt_pass, NT_HASH_LEN) == 0) ?
 917                         True : False;
 918         }
 919
 920         if (password_good) {
 921
 922                 /* User *DOES* know the password, update logon_time and reset
 923                  * bad_pw_count */
 924
 925                 my_info3->user_flgs |= LOGON_CACHED_ACCOUNT;
 926
 927                 if (my_info3->acct_flags & ACB_AUTOLOCK) {
 928                         return NT_STATUS_ACCOUNT_LOCKED_OUT;
 929                 }
 930
 931                 if (my_info3->acct_flags & ACB_DISABLED) {
 932                         return NT_STATUS_ACCOUNT_DISABLED;
 933                 }
 934
 935                 if (my_info3->acct_flags & ACB_WSTRUST) {
 936                         return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
 937                 }
 938
 939                 if (my_info3->acct_flags & ACB_SVRTRUST) {
 940                         return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
 941                 }
 942
 943                 if (my_info3->acct_flags & ACB_DOMTRUST) {
 944                         return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
 945                 }
 946
 947                 if (!(my_info3->acct_flags & ACB_NORMAL)) {
 948                         DEBUG(0,("winbindd_dual_pam_auth_cached: whats wrong with that one?: 0x%08x\n",
 949                                 my_info3->acct_flags));
 950                         return NT_STATUS_LOGON_FAILURE;
 951                 }
 952
 953                 kickoff_time = nt_time_to_unix(my_info3->kickoff_time);
 954                 if (kickoff_time != 0 && time(NULL) > kickoff_time) {
 955                         return NT_STATUS_ACCOUNT_EXPIRED;
 956                 }
 957
 958                 must_change_time = nt_time_to_unix(my_info3->pass_must_change_time);
 959                 if (must_change_time != 0 && must_change_time < time(NULL)) {
 960                         /* we allow grace logons when the password has expired */
 961                         my_info3->user_flgs |= LOGON_GRACE_LOGON;
 962                         /* return NT_STATUS_PASSWORD_EXPIRED; */
 963                         goto success;
 964                 }
 965
 966 #ifdef HAVE_KRB5
 967                 if ((state->request.flags & WBFLAG_PAM_KRB5) &&
 968                     ((tdc_domain = wcache_tdc_fetch_domain(state->mem_ctx, name_domain)) != NULL) &&
 969                     (tdc_domain->trust_type & DS_DOMAIN_TRUST_TYPE_UPLEVEL)) {
 970
 971                         uid_t uid = -1;
 972                         const char *cc = NULL;
 973                         char *realm = NULL;
 974                         const char *principal_s = NULL;
 975                         const char *service = NULL;
 976                         bool internal_ccache = False;
 977
 978                         uid = get_uid_from_state(state);
 979                         if (uid == -1) {
 980                                 DEBUG(0,("winbindd_dual_pam_auth_cached: invalid uid\n"));
 981                                 return NT_STATUS_INVALID_PARAMETER;
 982                         }
 983
 984                         cc = generate_krb5_ccache(state->mem_ctx,
 985                                                 state->request.data.auth.krb5_cc_type,
 986                                                 state->request.data.auth.uid,
 987                                                 &internal_ccache);
 988                         if (cc == NULL) {
 989                                 return NT_STATUS_NO_MEMORY;
 990                         }
 991
 992                         realm = domain->alt_name;
 993                         strupper_m(realm);
 994
 995                         principal_s = talloc_asprintf(state->mem_ctx, "%s@%s", name_user, realm);
 996                         if (principal_s == NULL) {
 997                                 return NT_STATUS_NO_MEMORY;
 998                         }
 999
1000                         service = talloc_asprintf(state->mem_ctx, "%s/%s@%s", KRB5_TGS_NAME, realm, realm);
1001                         if (service == NULL) {
1002                                 return NT_STATUS_NO_MEMORY;
1003                         }
1004
1005                         if (!internal_ccache) {
1006
1007                                 setup_return_cc_name(state, cc);
1008
1009                                 result = add_ccache_to_list(principal_s,
1010                                                             cc,
1011                                                             service,
1012                                                             state->request.data.auth.user,
1013                                                             domain->alt_name,
1014                                                             uid,
1015                                                             time(NULL),
1016                                                             time(NULL) + lp_winbind_cache_time(),
1017                                                             time(NULL) + WINBINDD_PAM_AUTH_KRB5_RENEW_TIME,
1018                                                             True);
1019
1020                                 if (!NT_STATUS_IS_OK(result)) {
1021                                         DEBUG(10,("winbindd_dual_pam_auth_cached: failed "
1022                                                 "to add ccache to list: %s\n",
1023                                                 nt_errstr(result)));
1024                                 }
1025                         }
1026                 }
1027 #endif /* HAVE_KRB5 */
1028  success:
1029                 /* FIXME: we possibly should handle logon hours as well (does xp when
1030                  * offline?) see auth/auth_sam.c:sam_account_ok for details */
1031
1032                 unix_to_nt_time(&my_info3->logon_time, time(NULL));
1033                 my_info3->bad_pw_count = 0;
1034
1035                 result = winbindd_update_creds_by_info3(domain,
1036                                                         state->mem_ctx,
1037                                                         state->request.data.auth.user,
1038                                                         state->request.data.auth.pass,
1039                                                         my_info3);
1040                 if (!NT_STATUS_IS_OK(result)) {
1041                         DEBUG(1,("winbindd_dual_pam_auth_cached: failed to update creds: %s\n",
1042                                 nt_errstr(result)));
1043                         return result;
1044                 }
1045
1046                 return NT_STATUS_OK;
1047
1048         }
1049
1050         /* User does *NOT* know the correct password, modify info3 accordingly */
1051
1052         /* failure of this is not critical */
1053         result = get_max_bad_attempts_from_lockout_policy(domain, state->mem_ctx, &max_allowed_bad_attempts);
1054         if (!NT_STATUS_IS_OK(result)) {
1055                 DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get max_allowed_bad_attempts. "
1056                           "Won't be able to honour account lockout policies\n"));
1057         }
1058
1059         /* increase counter */
1060         my_info3->bad_pw_count++;
1061
1062         if (max_allowed_bad_attempts == 0) {
1063                 goto failed;
1064         }
1065
1066         /* lockout user */
1067         if (my_info3->bad_pw_count >= max_allowed_bad_attempts) {
1068
1069                 uint32 password_properties;
1070
1071                 result = get_pwd_properties(domain, state->mem_ctx, &password_properties);
1072                 if (!NT_STATUS_IS_OK(result)) {
1073                         DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get password properties.\n"));
1074                 }
1075
1076                 if ((my_info3->user_rid != DOMAIN_USER_RID_ADMIN) ||
1077                     (password_properties & DOMAIN_LOCKOUT_ADMINS)) {
1078                         my_info3->acct_flags |= ACB_AUTOLOCK;
1079                 }
1080         }
1081
1082 failed:
1083         result = winbindd_update_creds_by_info3(domain,
1084                                                 state->mem_ctx,
1085                                                 state->request.data.auth.user,
1086                                                 NULL,
1087                                                 my_info3);
1088
1089         if (!NT_STATUS_IS_OK(result)) {
1090                 DEBUG(0,("winbindd_dual_pam_auth_cached: failed to update creds %s\n",
1091                         nt_errstr(result)));
1092         }
1093
1094         return NT_STATUS_LOGON_FAILURE;
1095 }
1096
1097 NTSTATUS winbindd_dual_pam_auth_kerberos(struct winbindd_domain *domain,
1098                                          struct winbindd_cli_state *state,
1099                                          NET_USER_INFO_3 **info3)
1100 {
1101         struct winbindd_domain *contact_domain;
1102         fstring name_domain, name_user;
1103         NTSTATUS result;
1104
1105         DEBUG(10,("winbindd_dual_pam_auth_kerberos\n"));
1106
1107         /* Parse domain and username */
1108
1109         parse_domain_user(state->request.data.auth.user, name_domain, name_user);
1110
1111         /* what domain should we contact? */
1112
1113         if ( IS_DC ) {
1114                 if (!(contact_domain = find_domain_from_name(name_domain))) {
1115                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
1116                                   state->request.data.auth.user, name_domain, name_user, name_domain));
1117                         result = NT_STATUS_NO_SUCH_USER;
1118                         goto done;
1119                 }
1120
1121         } else {
1122                 if (is_myname(name_domain)) {
1123                         DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
1124                         result =  NT_STATUS_NO_SUCH_USER;
1125                         goto done;
1126                 }
1127
1128                 contact_domain = find_domain_from_name(name_domain);
1129                 if (contact_domain == NULL) {
1130                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
1131                                   state->request.data.auth.user, name_domain, name_user, name_domain));
1132
1133                         contact_domain = find_our_domain();
1134                 }
1135         }
1136
1137         if (contact_domain->initialized &&
1138             contact_domain->active_directory) {
1139                 goto try_login;
1140         }
1141
1142         if (!contact_domain->initialized) {
1143                 init_dc_connection(contact_domain);
1144         }
1145
1146         if (!contact_domain->active_directory) {
1147                 DEBUG(3,("krb5 auth requested but domain is not Active Directory\n"));
1148                 return NT_STATUS_INVALID_LOGON_TYPE;
1149         }
1150 try_login:
1151         result = winbindd_raw_kerberos_login(contact_domain, state, info3);
1152 done:
1153         return result;
1154 }
1155
1156 NTSTATUS winbindd_dual_pam_auth_samlogon(struct winbindd_domain *domain,
1157                                          struct winbindd_cli_state *state,
1158                                          NET_USER_INFO_3 **info3)
1159 {
1160
1161         struct rpc_pipe_client *netlogon_pipe;
1162         uchar chal[8];
1163         DATA_BLOB lm_resp;
1164         DATA_BLOB nt_resp;
1165         int attempts = 0;
1166         unsigned char local_lm_response[24];
1167         unsigned char local_nt_response[24];
1168         struct winbindd_domain *contact_domain;
1169         fstring name_domain, name_user;
1170         bool retry;
1171         NTSTATUS result;
1172         NET_USER_INFO_3 *my_info3;
1173
1174         ZERO_STRUCTP(info3);
1175
1176         *info3 = NULL;
1177
1178         my_info3 = TALLOC_ZERO_P(state->mem_ctx, NET_USER_INFO_3);
1179         if (my_info3 == NULL) {
1180                 return NT_STATUS_NO_MEMORY;
1181         }
1182
1183
1184         DEBUG(10,("winbindd_dual_pam_auth_samlogon\n"));
1185
1186         /* Parse domain and username */
1187
1188         parse_domain_user(state->request.data.auth.user, name_domain, name_user);
1189
1190         /* do password magic */
1191
1192
1193         generate_random_buffer(chal, 8);
1194         if (lp_client_ntlmv2_auth()) {
1195                 DATA_BLOB server_chal;
1196                 DATA_BLOB names_blob;
1197                 DATA_BLOB nt_response;
1198                 DATA_BLOB lm_response;
1199                 server_chal = data_blob_talloc(state->mem_ctx, chal, 8);
1200
1201                 /* note that the 'workgroup' here is a best guess - we don't know
1202                    the server's domain at this point.  The 'server name' is also
1203                    dodgy...
1204                 */
1205                 names_blob = NTLMv2_generate_names_blob(global_myname(), lp_workgroup());
1206
1207                 if (!SMBNTLMv2encrypt(name_user, name_domain,
1208                                       state->request.data.auth.pass,
1209                                       &server_chal,
1210                                       &names_blob,
1211                                       &lm_response, &nt_response, NULL)) {
1212                         data_blob_free(&names_blob);
1213                         data_blob_free(&server_chal);
1214                         DEBUG(0, ("winbindd_pam_auth: SMBNTLMv2encrypt() failed!\n"));
1215                         result = NT_STATUS_NO_MEMORY;
1216                         goto done;
1217                 }
1218                 data_blob_free(&names_blob);
1219                 data_blob_free(&server_chal);
1220                 lm_resp = data_blob_talloc(state->mem_ctx, lm_response.data,
1221                                            lm_response.length);
1222                 nt_resp = data_blob_talloc(state->mem_ctx, nt_response.data,
1223                                            nt_response.length);
1224                 data_blob_free(&lm_response);
1225                 data_blob_free(&nt_response);
1226
1227         } else {
1228                 if (lp_client_lanman_auth()
1229                     && SMBencrypt(state->request.data.auth.pass,
1230                                   chal,
1231                                   local_lm_response)) {
1232                         lm_resp = data_blob_talloc(state->mem_ctx,
1233                                                    local_lm_response,
1234                                                    sizeof(local_lm_response));
1235                 } else {
1236                         lm_resp = data_blob_null;
1237                 }
1238                 SMBNTencrypt(state->request.data.auth.pass,
1239                              chal,
1240                              local_nt_response);
1241
1242                 nt_resp = data_blob_talloc(state->mem_ctx,
1243                                            local_nt_response,
1244                                            sizeof(local_nt_response));
1245         }
1246
1247         /* what domain should we contact? */
1248
1249         if ( IS_DC ) {
1250                 if (!(contact_domain = find_domain_from_name(name_domain))) {
1251                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
1252                                   state->request.data.auth.user, name_domain, name_user, name_domain));
1253                         result = NT_STATUS_NO_SUCH_USER;
1254                         goto done;
1255                 }
1256
1257         } else {
1258                 if (is_myname(name_domain)) {
1259                         DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
1260                         result =  NT_STATUS_NO_SUCH_USER;
1261                         goto done;
1262                 }
1263
1264                 contact_domain = find_our_domain();
1265         }
1266
1267         /* check authentication loop */
1268
1269         do {
1270
1271                 ZERO_STRUCTP(my_info3);
1272                 retry = False;
1273
1274                 result = cm_connect_netlogon(contact_domain, &netlogon_pipe);
1275
1276                 if (!NT_STATUS_IS_OK(result)) {
1277                         DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
1278                         goto done;
1279                 }
1280
1281                 result = rpccli_netlogon_sam_network_logon(netlogon_pipe,
1282                                                            state->mem_ctx,
1283                                                            0,
1284                                                            contact_domain->dcname, /* server name */
1285                                                            name_user,              /* user name */
1286                                                            name_domain,            /* target domain */
1287                                                            global_myname(),        /* workstation */
1288                                                            chal,
1289                                                            lm_resp,
1290                                                            nt_resp,
1291                                                            my_info3);
1292                 attempts += 1;
1293
1294                 /* We have to try a second time as cm_connect_netlogon
1295                    might not yet have noticed that the DC has killed
1296                    our connection. */
1297
1298                 if (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)) {
1299                         retry = True;
1300                         continue;
1301                 }
1302
1303                 /* if we get access denied, a possible cause was that we had
1304                    and open connection to the DC, but someone changed our
1305                    machine account password out from underneath us using 'net
1306                    rpc changetrustpw' */
1307
1308                 if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
1309                         DEBUG(3,("winbindd_pam_auth: sam_logon returned "
1310                                  "ACCESS_DENIED.  Maybe the trust account "
1311                                 "password was changed and we didn't know it. "
1312                                  "Killing connections to domain %s\n",
1313                                 name_domain));
1314                         invalidate_cm_connection(&contact_domain->conn);
1315                         retry = True;
1316                 }
1317
1318         } while ( (attempts < 2) && retry );
1319
1320         /* handle the case where a NT4 DC does not fill in the acct_flags in
1321          * the samlogon reply info3. When accurate info3 is required by the
1322          * caller, we look up the account flags ourselve - gd */
1323
1324         if ((state->request.flags & WBFLAG_PAM_INFO3_TEXT) &&
1325             (my_info3->acct_flags == 0) && NT_STATUS_IS_OK(result)) {
1326
1327                 struct rpc_pipe_client *samr_pipe;
1328                 POLICY_HND samr_domain_handle, user_pol;
1329                 SAM_USERINFO_CTR *user_ctr;
1330                 NTSTATUS status_tmp;
1331                 uint32 acct_flags;
1332
1333                 ZERO_STRUCT(user_ctr);
1334
1335                 status_tmp = cm_connect_sam(contact_domain, state->mem_ctx,
1336                                             &samr_pipe, &samr_domain_handle);
1337
1338                 if (!NT_STATUS_IS_OK(status_tmp)) {
1339                         DEBUG(3, ("could not open handle to SAMR pipe: %s\n",
1340                                 nt_errstr(status_tmp)));
1341                         goto done;
1342                 }
1343
1344                 status_tmp = rpccli_samr_open_user(samr_pipe, state->mem_ctx,
1345                                                    &samr_domain_handle,
1346                                                    MAXIMUM_ALLOWED_ACCESS,
1347                                                    my_info3->user_rid, &user_pol);
1348
1349                 if (!NT_STATUS_IS_OK(status_tmp)) {
1350                         DEBUG(3, ("could not open user handle on SAMR pipe: %s\n",
1351                                 nt_errstr(status_tmp)));
1352                         goto done;
1353                 }
1354
1355                 status_tmp = rpccli_samr_query_userinfo(samr_pipe, state->mem_ctx,
1356                                                         &user_pol, 16, &user_ctr);
1357
1358                 if (!NT_STATUS_IS_OK(status_tmp)) {
1359                         DEBUG(3, ("could not query user info on SAMR pipe: %s\n",
1360                                 nt_errstr(status_tmp)));
1361                         rpccli_samr_close(samr_pipe, state->mem_ctx, &user_pol);
1362                         goto done;
1363                 }
1364
1365                 acct_flags = user_ctr->info.id16->acb_info;
1366
1367                 if (acct_flags == 0) {
1368                         rpccli_samr_close(samr_pipe, state->mem_ctx, &user_pol);
1369                         goto done;
1370                 }
1371
1372                 my_info3->acct_flags = acct_flags;
1373
1374                 DEBUG(10,("successfully retrieved acct_flags 0x%x\n", acct_flags));
1375
1376                 rpccli_samr_close(samr_pipe, state->mem_ctx, &user_pol);
1377         }
1378
1379         *info3 = my_info3;
1380 done:
1381         return result;
1382 }
1383
1384 enum winbindd_result winbindd_dual_pam_auth(struct winbindd_domain *domain,
1385                                             struct winbindd_cli_state *state)
1386 {
1387         NTSTATUS result = NT_STATUS_LOGON_FAILURE;
1388         NTSTATUS krb5_result = NT_STATUS_OK;
1389         fstring name_domain, name_user;
1390         NET_USER_INFO_3 *info3 = NULL;
1391
1392         /* Ensure null termination */
1393         state->request.data.auth.user[sizeof(state->request.data.auth.user)-1]='\0';
1394
1395         /* Ensure null termination */
1396         state->request.data.auth.pass[sizeof(state->request.data.auth.pass)-1]='\0';
1397
1398         DEBUG(3, ("[%5lu]: dual pam auth %s\n", (unsigned long)state->pid,
1399                   state->request.data.auth.user));
1400
1401         if (!check_request_flags(state->request.flags)) {
1402                 result = NT_STATUS_INVALID_PARAMETER_MIX;
1403                 goto done;
1404         }
1405
1406         /* Parse domain and username */
1407
1408         ws_name_return( state->request.data.auth.user, WB_REPLACE_CHAR );
1409
1410         parse_domain_user(state->request.data.auth.user, name_domain, name_user);
1411
1412         if (domain->online == False) {
1413                 result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1414                 if (domain->startup) {
1415                         /* Logons are very important to users. If we're offline and
1416                            we get a request within the first 30 seconds of startup,
1417                            try very hard to find a DC and go online. */
1418
1419                         DEBUG(10,("winbindd_dual_pam_auth: domain: %s offline and auth "
1420                                 "request in startup mode.\n", domain->name ));
1421
1422                         winbindd_flush_negative_conn_cache(domain);
1423                         result = init_dc_connection(domain);
1424                 }
1425         }
1426
1427         DEBUG(10,("winbindd_dual_pam_auth: domain: %s last was %s\n", domain->name, domain->online ? "online":"offline"));
1428
1429         /* Check for Kerberos authentication */
1430         if (domain->online && (state->request.flags & WBFLAG_PAM_KRB5)) {
1431
1432                 result = winbindd_dual_pam_auth_kerberos(domain, state, &info3);
1433                 /* save for later */
1434                 krb5_result = result;
1435
1436
1437                 if (NT_STATUS_IS_OK(result)) {
1438                         DEBUG(10,("winbindd_dual_pam_auth_kerberos succeeded\n"));
1439                         goto process_result;
1440                 } else {
1441                         DEBUG(10,("winbindd_dual_pam_auth_kerberos failed: %s\n", nt_errstr(result)));
1442                 }
1443
1444                 if (NT_STATUS_EQUAL(result, NT_STATUS_NO_LOGON_SERVERS) ||
1445                     NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT) ||
1446                     NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
1447                         DEBUG(10,("winbindd_dual_pam_auth_kerberos setting domain to offline\n"));
1448                         set_domain_offline( domain );
1449                         goto cached_logon;
1450                 }
1451
1452                 /* there are quite some NT_STATUS errors where there is no
1453                  * point in retrying with a samlogon, we explictly have to take
1454                  * care not to increase the bad logon counter on the DC */
1455
1456                 if (NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_DISABLED) ||
1457                     NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_EXPIRED) ||
1458                     NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_LOCKED_OUT) ||
1459                     NT_STATUS_EQUAL(result, NT_STATUS_INVALID_LOGON_HOURS) ||
1460                     NT_STATUS_EQUAL(result, NT_STATUS_INVALID_WORKSTATION) ||
1461                     NT_STATUS_EQUAL(result, NT_STATUS_LOGON_FAILURE) ||
1462                     NT_STATUS_EQUAL(result, NT_STATUS_NO_SUCH_USER) ||
1463                     NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_EXPIRED) ||
1464                     NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_MUST_CHANGE) ||
1465                     NT_STATUS_EQUAL(result, NT_STATUS_WRONG_PASSWORD)) {
1466                         goto process_result;
1467                 }
1468
1469                 if (state->request.flags & WBFLAG_PAM_FALLBACK_AFTER_KRB5) {
1470                         DEBUG(3,("falling back to samlogon\n"));
1471                         goto sam_logon;
1472                 } else {
1473                         goto cached_logon;
1474                 }
1475         }
1476
1477 sam_logon:
1478         /* Check for Samlogon authentication */
1479         if (domain->online) {
1480                 result = winbindd_dual_pam_auth_samlogon(domain, state, &info3);
1481
1482                 if (NT_STATUS_IS_OK(result)) {
1483                         DEBUG(10,("winbindd_dual_pam_auth_samlogon succeeded\n"));
1484                         /* add the Krb5 err if we have one */
1485                         if ( NT_STATUS_EQUAL(krb5_result, NT_STATUS_TIME_DIFFERENCE_AT_DC ) ) {
1486                                 info3->user_flgs |= LOGON_KRB5_FAIL_CLOCK_SKEW;
1487                         }
1488                         goto process_result;
1489                 }
1490
1491                 DEBUG(10,("winbindd_dual_pam_auth_samlogon failed: %s\n",
1492                           nt_errstr(result)));
1493
1494                 if (NT_STATUS_EQUAL(result, NT_STATUS_NO_LOGON_SERVERS) ||
1495                     NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT) ||
1496                     NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND))
1497                 {
1498                         DEBUG(10,("winbindd_dual_pam_auth_samlogon setting domain to offline\n"));
1499                         set_domain_offline( domain );
1500                         goto cached_logon;
1501                 }
1502
1503                         if (domain->online) {
1504                                 /* We're still online - fail. */
1505                                 goto done;
1506                         }
1507         }
1508
1509 cached_logon:
1510         /* Check for Cached logons */
1511         if (!domain->online && (state->request.flags & WBFLAG_PAM_CACHED_LOGIN) &&
1512             lp_winbind_offline_logon()) {
1513
1514                 result = winbindd_dual_pam_auth_cached(domain, state, &info3);
1515
1516                 if (NT_STATUS_IS_OK(result)) {
1517                         DEBUG(10,("winbindd_dual_pam_auth_cached succeeded\n"));
1518                         goto process_result;
1519                 } else {
1520                         DEBUG(10,("winbindd_dual_pam_auth_cached failed: %s\n", nt_errstr(result)));
1521                         goto done;
1522                 }
1523         }
1524
1525 process_result:
1526
1527         if (NT_STATUS_IS_OK(result)) {
1528
1529                 DOM_SID user_sid;
1530
1531                 /* In all codepaths where result == NT_STATUS_OK info3 must have
1532                    been initialized. */
1533                 if (!info3) {
1534                         result = NT_STATUS_INTERNAL_ERROR;
1535                         goto done;
1536                 }
1537
1538                 netsamlogon_cache_store(name_user, info3);
1539                 wcache_invalidate_samlogon(find_domain_from_name(name_domain), info3);
1540
1541                 /* save name_to_sid info as early as possible (only if
1542                    this is our primary domain so we don't invalidate
1543                    the cache entry by storing the seq_num for the wrong
1544                    domain). */
1545                 if ( domain->primary ) {
1546                         sid_compose(&user_sid, &info3->dom_sid.sid,
1547                                     info3->user_rid);
1548                         cache_name2sid(domain, name_domain, name_user,
1549                                        SID_NAME_USER, &user_sid);
1550                 }
1551
1552                 /* Check if the user is in the right group */
1553
1554                 if (!NT_STATUS_IS_OK(result = check_info3_in_group(state->mem_ctx, info3,
1555                                         state->request.data.auth.require_membership_of_sid))) {
1556                         DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
1557                                   state->request.data.auth.user,
1558                                   state->request.data.auth.require_membership_of_sid));
1559                         goto done;
1560                 }
1561
1562                 result = append_data(state, info3, name_domain, name_user);
1563                 if (!NT_STATUS_IS_OK(result)) {
1564                         goto done;
1565                 }
1566
1567                 if ((state->request.flags & WBFLAG_PAM_CACHED_LOGIN)) {
1568
1569                         /* Store in-memory creds for single-signon using ntlm_auth. */
1570                         result = winbindd_add_memory_creds(state->request.data.auth.user,
1571                                                         get_uid_from_state(state),
1572                                                         state->request.data.auth.pass);
1573
1574                         if (!NT_STATUS_IS_OK(result)) {
1575                                 DEBUG(10,("Failed to store memory creds: %s\n", nt_errstr(result)));
1576                                 goto done;
1577                         }
1578
1579                         if (lp_winbind_offline_logon()) {
1580                                 result = winbindd_store_creds(domain,
1581                                                       state->mem_ctx,
1582                                                       state->request.data.auth.user,
1583                                                       state->request.data.auth.pass,
1584                                                       info3, NULL);
1585                                 if (!NT_STATUS_IS_OK(result)) {
1586
1587                                         /* Release refcount. */
1588                                         winbindd_delete_memory_creds(state->request.data.auth.user);
1589
1590                                         DEBUG(10,("Failed to store creds: %s\n", nt_errstr(result)));
1591                                         goto done;
1592                                 }
1593                         }
1594                 }
1595
1596                 result = fillup_password_policy(domain, state);
1597
1598                 if (!NT_STATUS_IS_OK(result)
1599                     && !NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED) )
1600                 {
1601                         DEBUG(10,("Failed to get password policies: %s\n", nt_errstr(result)));
1602                         goto done;
1603                 }
1604
1605                 result = NT_STATUS_OK;
1606         }
1607
1608 done:
1609         /* give us a more useful (more correct?) error code */
1610         if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) ||
1611             (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
1612                 result = NT_STATUS_NO_LOGON_SERVERS;
1613         }
1614
1615         state->response.data.auth.nt_status = NT_STATUS_V(result);
1616         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
1617
1618         /* we might have given a more useful error above */
1619         if (!*state->response.data.auth.error_string)
1620                 fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
1621         state->response.data.auth.pam_error = nt_status_to_pam(result);
1622
1623         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n",
1624               state->request.data.auth.user,
1625               state->response.data.auth.nt_status_string,
1626               state->response.data.auth.pam_error));
1627
1628         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
1629 }
1630
1631
1632 /**********************************************************************
1633  Challenge Response Authentication Protocol
1634 **********************************************************************/
1635
1636 void winbindd_pam_auth_crap(struct winbindd_cli_state *state)
1637 {
1638         struct winbindd_domain *domain = NULL;
1639         const char *domain_name = NULL;
1640         NTSTATUS result;
1641
1642         if (!check_request_flags(state->request.flags)) {
1643                 result = NT_STATUS_INVALID_PARAMETER_MIX;
1644                 goto done;
1645         }
1646
1647         if (!state->privileged) {
1648                 char *error_string = NULL;
1649                 DEBUG(2, ("winbindd_pam_auth_crap: non-privileged access "
1650                           "denied.  !\n"));
1651                 DEBUGADD(2, ("winbindd_pam_auth_crap: Ensure permissions "
1652                              "on %s are set correctly.\n",
1653                              get_winbind_priv_pipe_dir()));
1654                 /* send a better message than ACCESS_DENIED */
1655                 error_string = talloc_asprintf(state->mem_ctx,
1656                                                "winbind client not authorized "
1657                                                "to use winbindd_pam_auth_crap."
1658                                                " Ensure permissions on %s "
1659                                                "are set correctly.",
1660                                                get_winbind_priv_pipe_dir());
1661                 fstrcpy(state->response.data.auth.error_string, error_string);
1662                 result = NT_STATUS_ACCESS_DENIED;
1663                 goto done;
1664         }
1665
1666         /* Ensure null termination */
1667         state->request.data.auth_crap.user
1668                 [sizeof(state->request.data.auth_crap.user)-1]=0;
1669         state->request.data.auth_crap.domain
1670                 [sizeof(state->request.data.auth_crap.domain)-1]=0;
1671
1672         DEBUG(3, ("[%5lu]: pam auth crap domain: [%s] user: %s\n",
1673                   (unsigned long)state->pid,
1674                   state->request.data.auth_crap.domain,
1675                   state->request.data.auth_crap.user));
1676
1677         if (*state->request.data.auth_crap.domain != '\0') {
1678                 domain_name = state->request.data.auth_crap.domain;
1679         } else if (lp_winbind_use_default_domain()) {
1680                 domain_name = lp_workgroup();
1681         }
1682
1683         if (domain_name != NULL)
1684                 domain = find_auth_domain(state, domain_name);
1685
1686         if (domain != NULL) {
1687                 sendto_domain(state, domain);
1688                 return;
1689         }
1690
1691         result = NT_STATUS_NO_SUCH_USER;
1692
1693  done:
1694         set_auth_errors(&state->response, result);
1695         DEBUG(5, ("CRAP authentication for %s\\%s returned %s (PAM: %d)\n",
1696                   state->request.data.auth_crap.domain,
1697                   state->request.data.auth_crap.user,
1698                   state->response.data.auth.nt_status_string,
1699                   state->response.data.auth.pam_error));
1700         request_error(state);
1701         return;
1702 }
1703
1704
1705 enum winbindd_result winbindd_dual_pam_auth_crap(struct winbindd_domain *domain,
1706                                                  struct winbindd_cli_state *state)
1707 {
1708         NTSTATUS result;
1709         NET_USER_INFO_3 info3;
1710         struct rpc_pipe_client *netlogon_pipe;
1711         const char *name_user = NULL;
1712         const char *name_domain = NULL;
1713         const char *workstation;
1714         struct winbindd_domain *contact_domain;
1715         int attempts = 0;
1716         bool retry;
1717
1718         DATA_BLOB lm_resp, nt_resp;
1719
1720         /* This is child-only, so no check for privileged access is needed
1721            anymore */
1722
1723         /* Ensure null termination */
1724         state->request.data.auth_crap.user[sizeof(state->request.data.auth_crap.user)-1]=0;
1725         state->request.data.auth_crap.domain[sizeof(state->request.data.auth_crap.domain)-1]=0;
1726
1727         if (!check_request_flags(state->request.flags)) {
1728                 result = NT_STATUS_INVALID_PARAMETER_MIX;
1729                 goto done;
1730         }
1731
1732         name_user = state->request.data.auth_crap.user;
1733
1734         if (*state->request.data.auth_crap.domain) {
1735                 name_domain = state->request.data.auth_crap.domain;
1736         } else if (lp_winbind_use_default_domain()) {
1737                 name_domain = lp_workgroup();
1738         } else {
1739                 DEBUG(5,("no domain specified with username (%s) - failing auth\n",
1740                          name_user));
1741                 result = NT_STATUS_NO_SUCH_USER;
1742                 goto done;
1743         }
1744
1745         DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid,
1746                   name_domain, name_user));
1747
1748         if (*state->request.data.auth_crap.workstation) {
1749                 workstation = state->request.data.auth_crap.workstation;
1750         } else {
1751                 workstation = global_myname();
1752         }
1753
1754         if (state->request.data.auth_crap.lm_resp_len > sizeof(state->request.data.auth_crap.lm_resp)
1755                 || state->request.data.auth_crap.nt_resp_len > sizeof(state->request.data.auth_crap.nt_resp)) {
1756                 DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n",
1757                           state->request.data.auth_crap.lm_resp_len,
1758                           state->request.data.auth_crap.nt_resp_len));
1759                 result = NT_STATUS_INVALID_PARAMETER;
1760                 goto done;
1761         }
1762
1763         lm_resp = data_blob_talloc(state->mem_ctx, state->request.data.auth_crap.lm_resp,
1764                                         state->request.data.auth_crap.lm_resp_len);
1765         nt_resp = data_blob_talloc(state->mem_ctx, state->request.data.auth_crap.nt_resp,
1766                                         state->request.data.auth_crap.nt_resp_len);
1767
1768         /* what domain should we contact? */
1769
1770         if ( IS_DC ) {
1771                 if (!(contact_domain = find_domain_from_name(name_domain))) {
1772                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
1773                                   state->request.data.auth_crap.user, name_domain, name_user, name_domain));
1774                         result = NT_STATUS_NO_SUCH_USER;
1775                         goto done;
1776                 }
1777         } else {
1778                 if (is_myname(name_domain)) {
1779                         DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
1780                         result =  NT_STATUS_NO_SUCH_USER;
1781                         goto done;
1782                 }
1783                 contact_domain = find_our_domain();
1784         }
1785
1786         do {
1787                 ZERO_STRUCT(info3);
1788                 retry = False;
1789
1790                 netlogon_pipe = NULL;
1791                 result = cm_connect_netlogon(contact_domain, &netlogon_pipe);
1792
1793                 if (!NT_STATUS_IS_OK(result)) {
1794                         DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n",
1795                                   nt_errstr(result)));
1796                         goto done;
1797                 }
1798
1799                 result = rpccli_netlogon_sam_network_logon(netlogon_pipe,
1800                                                            state->mem_ctx,
1801                                                            state->request.data.auth_crap.logon_parameters,
1802                                                            contact_domain->dcname,
1803                                                            name_user,
1804                                                            name_domain,
1805                                                                         /* Bug #3248 - found by Stefan Burkei. */
1806                                                            workstation, /* We carefully set this above so use it... */
1807                                                            state->request.data.auth_crap.chal,
1808                                                            lm_resp,
1809                                                            nt_resp,
1810                                                            &info3);
1811
1812                 attempts += 1;
1813
1814                 /* We have to try a second time as cm_connect_netlogon
1815                    might not yet have noticed that the DC has killed
1816                    our connection. */
1817
1818                 if (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)) {
1819                         retry = True;
1820                         continue;
1821                 }
1822
1823                 /* if we get access denied, a possible cause was that we had and open
1824                    connection to the DC, but someone changed our machine account password
1825                    out from underneath us using 'net rpc changetrustpw' */
1826
1827                 if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
1828                         DEBUG(3,("winbindd_pam_auth: sam_logon returned "
1829                                  "ACCESS_DENIED.  Maybe the trust account "
1830                                 "password was changed and we didn't know it. "
1831                                  "Killing connections to domain %s\n",
1832                                 name_domain));
1833                         invalidate_cm_connection(&contact_domain->conn);
1834                         retry = True;
1835                 }
1836
1837         } while ( (attempts < 2) && retry );
1838
1839         if (NT_STATUS_IS_OK(result)) {
1840
1841                 netsamlogon_cache_store(name_user, &info3);
1842                 wcache_invalidate_samlogon(find_domain_from_name(name_domain), &info3);
1843
1844                 /* Check if the user is in the right group */
1845
1846                 if (!NT_STATUS_IS_OK(result = check_info3_in_group(state->mem_ctx, &info3,
1847                                                         state->request.data.auth_crap.require_membership_of_sid))) {
1848                         DEBUG(3, ("User %s is not in the required group (%s), so "
1849                                   "crap authentication is rejected\n",
1850                                   state->request.data.auth_crap.user,
1851                                   state->request.data.auth_crap.require_membership_of_sid));
1852                         goto done;
1853                 }
1854
1855                 result = append_data(state, &info3, name_domain, name_user);
1856                 if (!NT_STATUS_IS_OK(result)) {
1857                         goto done;
1858                 }
1859         }
1860
1861 done:
1862
1863         /* give us a more useful (more correct?) error code */
1864         if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) ||
1865             (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
1866                 result = NT_STATUS_NO_LOGON_SERVERS;
1867         }
1868
1869         if (state->request.flags & WBFLAG_PAM_NT_STATUS_SQUASH) {
1870                 result = nt_status_squash(result);
1871         }
1872
1873         state->response.data.auth.nt_status = NT_STATUS_V(result);
1874         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
1875
1876         /* we might have given a more useful error above */
1877         if (!*state->response.data.auth.error_string) {
1878                 fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
1879         }
1880         state->response.data.auth.pam_error = nt_status_to_pam(result);
1881
1882         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
1883               ("NTLM CRAP authentication for user [%s]\\[%s] returned %s (PAM: %d)\n",
1884                name_domain,
1885                name_user,
1886                state->response.data.auth.nt_status_string,
1887                state->response.data.auth.pam_error));
1888
1889         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
1890 }
1891
1892 /* Change a user password */
1893
1894 void winbindd_pam_chauthtok(struct winbindd_cli_state *state)
1895 {
1896         fstring domain, user;
1897         struct winbindd_domain *contact_domain;
1898
1899         DEBUG(3, ("[%5lu]: pam chauthtok %s\n", (unsigned long)state->pid,
1900                 state->request.data.chauthtok.user));
1901
1902         /* Setup crap */
1903
1904         ws_name_return( state->request.data.auth.user, WB_REPLACE_CHAR );
1905
1906         if (!canonicalize_username(state->request.data.chauthtok.user, domain, user)) {
1907                 set_auth_errors(&state->response, NT_STATUS_NO_SUCH_USER);
1908                 DEBUG(5, ("winbindd_pam_chauthtok: canonicalize_username %s failed with %s"
1909                           "(PAM: %d)\n",
1910                           state->request.data.auth.user,
1911                           state->response.data.auth.nt_status_string,
1912                           state->response.data.auth.pam_error));
1913                 request_error(state);
1914                 return;
1915         }
1916
1917         contact_domain = find_domain_from_name(domain);
1918         if (!contact_domain) {
1919                 set_auth_errors(&state->response, NT_STATUS_NO_SUCH_USER);
1920                 DEBUG(3, ("Cannot change password for [%s] -> [%s]\\[%s] as %s is not a trusted domain\n",
1921                           state->request.data.chauthtok.user, domain, user, domain));
1922                 request_error(state);
1923                 return;
1924         }
1925
1926         sendto_domain(state, contact_domain);
1927 }
1928
1929 enum winbindd_result winbindd_dual_pam_chauthtok(struct winbindd_domain *contact_domain,
1930                                                  struct winbindd_cli_state *state)
1931 {
1932         char *oldpass;
1933         char *newpass = NULL;
1934         POLICY_HND dom_pol;
1935         struct rpc_pipe_client *cli;
1936         bool got_info = False;
1937         SAM_UNK_INFO_1 info;
1938         SAMR_CHANGE_REJECT reject;
1939         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
1940         fstring domain, user;
1941
1942         DEBUG(3, ("[%5lu]: dual pam chauthtok %s\n", (unsigned long)state->pid,
1943                   state->request.data.auth.user));
1944
1945         if (!parse_domain_user(state->request.data.chauthtok.user, domain, user)) {
1946                 goto done;
1947         }
1948
1949         /* Change password */
1950
1951         oldpass = state->request.data.chauthtok.oldpass;
1952         newpass = state->request.data.chauthtok.newpass;
1953
1954         /* Initialize reject reason */
1955         state->response.data.auth.reject_reason = Undefined;
1956
1957         /* Get sam handle */
1958
1959         result = cm_connect_sam(contact_domain, state->mem_ctx, &cli,
1960                                 &dom_pol);
1961         if (!NT_STATUS_IS_OK(result)) {
1962                 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
1963                 goto done;
1964         }
1965
1966         result = rpccli_samr_chgpasswd3(cli, state->mem_ctx, user, newpass, oldpass, &info, &reject);
1967
1968         /* Windows 2003 returns NT_STATUS_PASSWORD_RESTRICTION */
1969
1970         if (NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_RESTRICTION) ) {
1971                 state->response.data.auth.policy.min_length_password =
1972                         info.min_length_password;
1973                 state->response.data.auth.policy.password_history =
1974                         info.password_history;
1975                 state->response.data.auth.policy.password_properties =
1976                         info.password_properties;
1977                 state->response.data.auth.policy.expire =
1978                         nt_time_to_unix_abs(&info.expire);
1979                 state->response.data.auth.policy.min_passwordage =
1980                         nt_time_to_unix_abs(&info.min_passwordage);
1981
1982                 state->response.data.auth.reject_reason =
1983                         reject.reject_reason;
1984
1985                 got_info = True;
1986         }
1987
1988         /* only fallback when the chgpasswd3 call is not supported */
1989         if ((NT_STATUS_EQUAL(result, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR))) ||
1990                    (NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED)) ||
1991                    (NT_STATUS_EQUAL(result, NT_STATUS_NOT_IMPLEMENTED))) {
1992
1993                 DEBUG(10,("Password change with chgpasswd3 failed with: %s, retrying chgpasswd_user\n",
1994                         nt_errstr(result)));
1995
1996                 result = rpccli_samr_chgpasswd_user(cli, state->mem_ctx, user, newpass, oldpass);
1997
1998                 /* Windows 2000 returns NT_STATUS_ACCOUNT_RESTRICTION.
1999                    Map to the same status code as Windows 2003. */
2000
2001                 if ( NT_STATUS_EQUAL(NT_STATUS_ACCOUNT_RESTRICTION, result ) ) {
2002                         result = NT_STATUS_PASSWORD_RESTRICTION;
2003                 }
2004         }
2005
2006 done:
2007
2008         if (NT_STATUS_IS_OK(result) && (state->request.flags & WBFLAG_PAM_CACHED_LOGIN)) {
2009
2010                 /* Update the single sign-on memory creds. */
2011                 result = winbindd_replace_memory_creds(state->request.data.chauthtok.user,
2012                                                         newpass);
2013
2014                 if (!NT_STATUS_IS_OK(result)) {
2015                         DEBUG(10,("Failed to replace memory creds: %s\n", nt_errstr(result)));
2016                         goto process_result;
2017                 }
2018
2019                 if (lp_winbind_offline_logon()) {
2020                         result = winbindd_update_creds_by_name(contact_domain,
2021                                                          state->mem_ctx, user,
2022                                                          newpass);
2023                         if (!NT_STATUS_IS_OK(result)) {
2024                                 DEBUG(10,("Failed to store creds: %s\n", nt_errstr(result)));
2025                                 goto process_result;
2026                         }
2027                 }
2028         }
2029
2030         if (!NT_STATUS_IS_OK(result) && !got_info && contact_domain) {
2031
2032                 NTSTATUS policy_ret;
2033
2034                 policy_ret = fillup_password_policy(contact_domain, state);
2035
2036                 /* failure of this is non critical, it will just provide no
2037                  * additional information to the client why the change has
2038                  * failed - Guenther */
2039
2040                 if (!NT_STATUS_IS_OK(policy_ret)) {
2041                         DEBUG(10,("Failed to get password policies: %s\n", nt_errstr(policy_ret)));
2042                         goto process_result;
2043                 }
2044         }
2045
2046 process_result:
2047
2048         state->response.data.auth.nt_status = NT_STATUS_V(result);
2049         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
2050         fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
2051         state->response.data.auth.pam_error = nt_status_to_pam(result);
2052
2053         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
2054               ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
2055                domain,
2056                user,
2057                state->response.data.auth.nt_status_string,
2058                state->response.data.auth.pam_error));
2059
2060         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2061 }
2062
2063 void winbindd_pam_logoff(struct winbindd_cli_state *state)
2064 {
2065         struct winbindd_domain *domain;
2066         fstring name_domain, user;
2067         uid_t caller_uid = (uid_t)-1;
2068         uid_t request_uid = state->request.data.logoff.uid;
2069
2070         DEBUG(3, ("[%5lu]: pam logoff %s\n", (unsigned long)state->pid,
2071                 state->request.data.logoff.user));
2072
2073         /* Ensure null termination */
2074         state->request.data.logoff.user
2075                 [sizeof(state->request.data.logoff.user)-1]='\0';
2076
2077         state->request.data.logoff.krb5ccname
2078                 [sizeof(state->request.data.logoff.krb5ccname)-1]='\0';
2079
2080         if (request_uid == (gid_t)-1) {
2081                 goto failed;
2082         }
2083
2084         if (!canonicalize_username(state->request.data.logoff.user, name_domain, user)) {
2085                 goto failed;
2086         }
2087
2088         if ((domain = find_auth_domain(state, name_domain)) == NULL) {
2089                 goto failed;
2090         }
2091
2092         if ((sys_getpeereid(state->sock, &caller_uid)) != 0) {
2093                 DEBUG(1,("winbindd_pam_logoff: failed to check peerid: %s\n",
2094                         strerror(errno)));
2095                 goto failed;
2096         }
2097
2098         switch (caller_uid) {
2099                 case -1:
2100                         goto failed;
2101                 case 0:
2102                         /* root must be able to logoff any user - gd */
2103                         state->request.data.logoff.uid = request_uid;
2104                         break;
2105                 default:
2106                         if (caller_uid != request_uid) {
2107                                 DEBUG(1,("winbindd_pam_logoff: caller requested invalid uid\n"));
2108                                 goto failed;
2109                         }
2110                         state->request.data.logoff.uid = caller_uid;
2111                         break;
2112         }
2113
2114         sendto_domain(state, domain);
2115         return;
2116
2117  failed:
2118         set_auth_errors(&state->response, NT_STATUS_NO_SUCH_USER);
2119         DEBUG(5, ("Pam Logoff for %s returned %s "
2120                   "(PAM: %d)\n",
2121                   state->request.data.logoff.user,
2122                   state->response.data.auth.nt_status_string,
2123                   state->response.data.auth.pam_error));
2124         request_error(state);
2125         return;
2126 }
2127
2128 enum winbindd_result winbindd_dual_pam_logoff(struct winbindd_domain *domain,
2129                                               struct winbindd_cli_state *state)
2130 {
2131         NTSTATUS result = NT_STATUS_NOT_SUPPORTED;
2132
2133         DEBUG(3, ("[%5lu]: pam dual logoff %s\n", (unsigned long)state->pid,
2134                 state->request.data.logoff.user));
2135
2136         if (!(state->request.flags & WBFLAG_PAM_KRB5)) {
2137                 result = NT_STATUS_OK;
2138                 goto process_result;
2139         }
2140
2141         if (state->request.data.logoff.krb5ccname[0] == '\0') {
2142                 result = NT_STATUS_OK;
2143                 goto process_result;
2144         }
2145
2146 #ifdef HAVE_KRB5
2147
2148         if (state->request.data.logoff.uid < 0) {
2149                 DEBUG(0,("winbindd_pam_logoff: invalid uid\n"));
2150                 goto process_result;
2151         }
2152
2153         /* what we need here is to find the corresponding krb5 ccache name *we*
2154          * created for a given username and destroy it */
2155
2156         if (!ccache_entry_exists(state->request.data.logoff.user)) {
2157                 result = NT_STATUS_OK;
2158                 DEBUG(10,("winbindd_pam_logoff: no entry found.\n"));
2159                 goto process_result;
2160         }
2161
2162         if (!ccache_entry_identical(state->request.data.logoff.user,
2163                                         state->request.data.logoff.uid,
2164                                         state->request.data.logoff.krb5ccname)) {
2165                 DEBUG(0,("winbindd_pam_logoff: cached entry differs.\n"));
2166                 goto process_result;
2167         }
2168
2169         result = remove_ccache(state->request.data.logoff.user);
2170         if (!NT_STATUS_IS_OK(result)) {
2171                 DEBUG(0,("winbindd_pam_logoff: failed to remove ccache: %s\n",
2172                         nt_errstr(result)));
2173                 goto process_result;
2174         }
2175
2176 #else
2177         result = NT_STATUS_NOT_SUPPORTED;
2178 #endif
2179
2180 process_result:
2181
2182         winbindd_delete_memory_creds(state->request.data.logoff.user);
2183
2184         state->response.data.auth.nt_status = NT_STATUS_V(result);
2185         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
2186         fstrcpy(state->response.data.auth.error_string, get_friendly_nt_error_msg(result));
2187         state->response.data.auth.pam_error = nt_status_to_pam(result);
2188
2189         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2190 }
2191
2192 /* Change user password with auth crap*/
2193
2194 void winbindd_pam_chng_pswd_auth_crap(struct winbindd_cli_state *state)
2195 {
2196         struct winbindd_domain *domain = NULL;
2197         const char *domain_name = NULL;
2198
2199         /* Ensure null termination */
2200         state->request.data.chng_pswd_auth_crap.user[
2201                 sizeof(state->request.data.chng_pswd_auth_crap.user)-1]=0;
2202         state->request.data.chng_pswd_auth_crap.domain[
2203                 sizeof(state->request.data.chng_pswd_auth_crap.domain)-1]=0;
2204
2205         DEBUG(3, ("[%5lu]: pam change pswd auth crap domain: %s user: %s\n",
2206                   (unsigned long)state->pid,
2207                   state->request.data.chng_pswd_auth_crap.domain,
2208                   state->request.data.chng_pswd_auth_crap.user));
2209
2210         if (*state->request.data.chng_pswd_auth_crap.domain != '\0') {
2211                 domain_name = state->request.data.chng_pswd_auth_crap.domain;
2212         } else if (lp_winbind_use_default_domain()) {
2213                 domain_name = lp_workgroup();
2214         }
2215
2216         if (domain_name != NULL)
2217                 domain = find_domain_from_name(domain_name);
2218
2219         if (domain != NULL) {
2220                 DEBUG(7, ("[%5lu]: pam auth crap changing pswd in domain: "
2221                           "%s\n", (unsigned long)state->pid,domain->name));
2222                 sendto_domain(state, domain);
2223                 return;
2224         }
2225
2226         set_auth_errors(&state->response, NT_STATUS_NO_SUCH_USER);
2227         DEBUG(5, ("CRAP change password  for %s\\%s returned %s (PAM: %d)\n",
2228                   state->request.data.chng_pswd_auth_crap.domain,
2229                   state->request.data.chng_pswd_auth_crap.user,
2230                   state->response.data.auth.nt_status_string,
2231                   state->response.data.auth.pam_error));
2232         request_error(state);
2233         return;
2234 }
2235
2236 enum winbindd_result winbindd_dual_pam_chng_pswd_auth_crap(struct winbindd_domain *domainSt, struct winbindd_cli_state *state)
2237 {
2238         NTSTATUS result;
2239         DATA_BLOB new_nt_password;
2240         DATA_BLOB old_nt_hash_enc;
2241         DATA_BLOB new_lm_password;
2242         DATA_BLOB old_lm_hash_enc;
2243         fstring  domain,user;
2244         POLICY_HND dom_pol;
2245         struct winbindd_domain *contact_domain = domainSt;
2246         struct rpc_pipe_client *cli;
2247
2248         /* Ensure null termination */
2249         state->request.data.chng_pswd_auth_crap.user[
2250                 sizeof(state->request.data.chng_pswd_auth_crap.user)-1]=0;
2251         state->request.data.chng_pswd_auth_crap.domain[
2252                 sizeof(state->request.data.chng_pswd_auth_crap.domain)-1]=0;
2253         *domain = 0;
2254         *user = 0;
2255
2256         DEBUG(3, ("[%5lu]: pam change pswd auth crap domain: %s user: %s\n",
2257                   (unsigned long)state->pid,
2258                   state->request.data.chng_pswd_auth_crap.domain,
2259                   state->request.data.chng_pswd_auth_crap.user));
2260
2261         if (lp_winbind_offline_logon()) {
2262                 DEBUG(0,("Refusing password change as winbind offline logons are enabled. "));
2263                 DEBUGADD(0,("Changing passwords here would risk inconsistent logons\n"));
2264                 result = NT_STATUS_ACCESS_DENIED;
2265                 goto done;
2266         }
2267
2268         if (*state->request.data.chng_pswd_auth_crap.domain) {
2269                 fstrcpy(domain,state->request.data.chng_pswd_auth_crap.domain);
2270         } else {
2271                 parse_domain_user(state->request.data.chng_pswd_auth_crap.user,
2272                                   domain, user);
2273
2274                 if(!*domain) {
2275                         DEBUG(3,("no domain specified with username (%s) - "
2276                                  "failing auth\n",
2277                                  state->request.data.chng_pswd_auth_crap.user));
2278                         result = NT_STATUS_NO_SUCH_USER;
2279                         goto done;
2280                 }
2281         }
2282
2283         if (!*domain && lp_winbind_use_default_domain()) {
2284                 fstrcpy(domain,(char *)lp_workgroup());
2285         }
2286
2287         if(!*user) {
2288                 fstrcpy(user, state->request.data.chng_pswd_auth_crap.user);
2289         }
2290
2291         DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n",
2292                   (unsigned long)state->pid, domain, user));
2293
2294         /* Change password */
2295         new_nt_password = data_blob_talloc(
2296                 state->mem_ctx,
2297                 state->request.data.chng_pswd_auth_crap.new_nt_pswd,
2298                 state->request.data.chng_pswd_auth_crap.new_nt_pswd_len);
2299
2300         old_nt_hash_enc = data_blob_talloc(
2301                 state->mem_ctx,
2302                 state->request.data.chng_pswd_auth_crap.old_nt_hash_enc,
2303                 state->request.data.chng_pswd_auth_crap.old_nt_hash_enc_len);
2304
2305         if(state->request.data.chng_pswd_auth_crap.new_lm_pswd_len > 0) {
2306                 new_lm_password = data_blob_talloc(
2307                         state->mem_ctx,
2308                         state->request.data.chng_pswd_auth_crap.new_lm_pswd,
2309                         state->request.data.chng_pswd_auth_crap.new_lm_pswd_len);
2310
2311                 old_lm_hash_enc = data_blob_talloc(
2312                         state->mem_ctx,
2313                         state->request.data.chng_pswd_auth_crap.old_lm_hash_enc,
2314                         state->request.data.chng_pswd_auth_crap.old_lm_hash_enc_len);
2315         } else {
2316                 new_lm_password.length = 0;
2317                 old_lm_hash_enc.length = 0;
2318         }
2319
2320         /* Get sam handle */
2321
2322         result = cm_connect_sam(contact_domain, state->mem_ctx, &cli, &dom_pol);
2323         if (!NT_STATUS_IS_OK(result)) {
2324                 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
2325                 goto done;
2326         }
2327
2328         result = rpccli_samr_chng_pswd_auth_crap(
2329                 cli, state->mem_ctx, user, new_nt_password, old_nt_hash_enc,
2330                 new_lm_password, old_lm_hash_enc);
2331
2332  done:
2333         state->response.data.auth.nt_status = NT_STATUS_V(result);
2334         fstrcpy(state->response.data.auth.nt_status_string, nt_errstr(result));
2335         fstrcpy(state->response.data.auth.error_string,
2336                 get_friendly_nt_error_msg(result));
2337         state->response.data.auth.pam_error = nt_status_to_pam(result);
2338
2339         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
2340               ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
2341                domain, user,
2342                state->response.data.auth.nt_status_string,
2343                state->response.data.auth.pam_error));
2344
2345         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2346 }