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 #include "../libcli/auth/libcli_auth.h"
  28 #include "../librpc/gen_ndr/cli_samr.h"
  29 #include "rpc_client/cli_samr.h"
  30 #include "../librpc/gen_ndr/ndr_netlogon.h"
  31 #include "rpc_client/cli_netlogon.h"
  32 #include "smb_krb5.h"
  33 #include "../lib/crypto/arcfour.h"
  34 #include "../libcli/security/security.h"
  35 #include "ads.h"
  36 #include "../librpc/gen_ndr/krb5pac.h"
  37
  38 #undef DBGC_CLASS
  39 #define DBGC_CLASS DBGC_WINBIND
  40
  41 #define LOGON_KRB5_FAIL_CLOCK_SKEW      0x02000000
  42
  43 static NTSTATUS append_info3_as_txt(TALLOC_CTX *mem_ctx,
  44                                     struct winbindd_response *resp,
  45                                     struct netr_SamInfo3 *info3)
  46 {
  47         char *ex;
  48         uint32_t i;
  49
  50         resp->data.auth.info3.logon_time =
  51                 nt_time_to_unix(info3->base.last_logon);
  52         resp->data.auth.info3.logoff_time =
  53                 nt_time_to_unix(info3->base.last_logoff);
  54         resp->data.auth.info3.kickoff_time =
  55                 nt_time_to_unix(info3->base.acct_expiry);
  56         resp->data.auth.info3.pass_last_set_time =
  57                 nt_time_to_unix(info3->base.last_password_change);
  58         resp->data.auth.info3.pass_can_change_time =
  59                 nt_time_to_unix(info3->base.allow_password_change);
  60         resp->data.auth.info3.pass_must_change_time =
  61                 nt_time_to_unix(info3->base.force_password_change);
  62
  63         resp->data.auth.info3.logon_count = info3->base.logon_count;
  64         resp->data.auth.info3.bad_pw_count = info3->base.bad_password_count;
  65
  66         resp->data.auth.info3.user_rid = info3->base.rid;
  67         resp->data.auth.info3.group_rid = info3->base.primary_gid;
  68         sid_to_fstring(resp->data.auth.info3.dom_sid, info3->base.domain_sid);
  69
  70         resp->data.auth.info3.num_groups = info3->base.groups.count;
  71         resp->data.auth.info3.user_flgs = info3->base.user_flags;
  72
  73         resp->data.auth.info3.acct_flags = info3->base.acct_flags;
  74         resp->data.auth.info3.num_other_sids = info3->sidcount;
  75
  76         fstrcpy(resp->data.auth.info3.user_name,
  77                 info3->base.account_name.string);
  78         fstrcpy(resp->data.auth.info3.full_name,
  79                 info3->base.full_name.string);
  80         fstrcpy(resp->data.auth.info3.logon_script,
  81                 info3->base.logon_script.string);
  82         fstrcpy(resp->data.auth.info3.profile_path,
  83                 info3->base.profile_path.string);
  84         fstrcpy(resp->data.auth.info3.home_dir,
  85                 info3->base.home_directory.string);
  86         fstrcpy(resp->data.auth.info3.dir_drive,
  87                 info3->base.home_drive.string);
  88
  89         fstrcpy(resp->data.auth.info3.logon_srv,
  90                 info3->base.logon_server.string);
  91         fstrcpy(resp->data.auth.info3.logon_dom,
  92                 info3->base.domain.string);
  93
  94         ex = talloc_strdup(mem_ctx, "");
  95         NT_STATUS_HAVE_NO_MEMORY(ex);
  96
  97         for (i=0; i < info3->base.groups.count; i++) {
  98                 ex = talloc_asprintf_append_buffer(ex, "0x%08X:0x%08X\n",
  99                                                    info3->base.groups.rids[i].rid,
 100                                                    info3->base.groups.rids[i].attributes);
 101                 NT_STATUS_HAVE_NO_MEMORY(ex);
 102         }
 103
 104         for (i=0; i < info3->sidcount; i++) {
 105                 char *sid;
 106
 107                 sid = dom_sid_string(mem_ctx, info3->sids[i].sid);
 108                 NT_STATUS_HAVE_NO_MEMORY(sid);
 109
 110                 ex = talloc_asprintf_append_buffer(ex, "%s:0x%08X\n",
 111                                                    sid,
 112                                                    info3->sids[i].attributes);
 113                 NT_STATUS_HAVE_NO_MEMORY(ex);
 114
 115                 talloc_free(sid);
 116         }
 117
 118         resp->extra_data.data = ex;
 119         resp->length += talloc_get_size(ex);
 120
 121         return NT_STATUS_OK;
 122 }
 123
 124 static NTSTATUS append_info3_as_ndr(TALLOC_CTX *mem_ctx,
 125                                     struct winbindd_response *resp,
 126                                     struct netr_SamInfo3 *info3)
 127 {
 128         DATA_BLOB blob;
 129         enum ndr_err_code ndr_err;
 130
 131         ndr_err = ndr_push_struct_blob(&blob, mem_ctx, info3,
 132                                        (ndr_push_flags_fn_t)ndr_push_netr_SamInfo3);
 133         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 134                 DEBUG(0,("append_info3_as_ndr: failed to append\n"));
 135                 return ndr_map_error2ntstatus(ndr_err);
 136         }
 137
 138         resp->extra_data.data = blob.data;
 139         resp->length += blob.length;
 140
 141         return NT_STATUS_OK;
 142 }
 143
 144 static NTSTATUS append_unix_username(TALLOC_CTX *mem_ctx,
 145                                      struct winbindd_response *resp,
 146                                      const struct netr_SamInfo3 *info3,
 147                                      const char *name_domain,
 148                                      const char *name_user)
 149 {
 150         /* We've been asked to return the unix username, per
 151            'winbind use default domain' settings and the like */
 152
 153         const char *nt_username, *nt_domain;
 154
 155         nt_domain = talloc_strdup(mem_ctx, info3->base.domain.string);
 156         if (!nt_domain) {
 157                 /* If the server didn't give us one, just use the one
 158                  * we sent them */
 159                 nt_domain = name_domain;
 160         }
 161
 162         nt_username = talloc_strdup(mem_ctx, info3->base.account_name.string);
 163         if (!nt_username) {
 164                 /* If the server didn't give us one, just use the one
 165                  * we sent them */
 166                 nt_username = name_user;
 167         }
 168
 169         fill_domain_username(resp->data.auth.unix_username,
 170                              nt_domain, nt_username, true);
 171
 172         DEBUG(5, ("Setting unix username to [%s]\n",
 173                   resp->data.auth.unix_username));
 174
 175         return NT_STATUS_OK;
 176 }
 177
 178 static NTSTATUS append_afs_token(TALLOC_CTX *mem_ctx,
 179                                  struct winbindd_response *resp,
 180                                  const struct netr_SamInfo3 *info3,
 181                                  const char *name_domain,
 182                                  const char *name_user)
 183 {
 184         char *afsname = NULL;
 185         char *cell;
 186         char *token;
 187
 188         afsname = talloc_strdup(mem_ctx, lp_afs_username_map());
 189         if (afsname == NULL) {
 190                 return NT_STATUS_NO_MEMORY;
 191         }
 192
 193         afsname = talloc_string_sub(mem_ctx,
 194                                     lp_afs_username_map(),
 195                                     "%D", name_domain);
 196         afsname = talloc_string_sub(mem_ctx, afsname,
 197                                     "%u", name_user);
 198         afsname = talloc_string_sub(mem_ctx, afsname,
 199                                     "%U", name_user);
 200
 201         {
 202                 struct dom_sid user_sid;
 203                 fstring sidstr;
 204
 205                 sid_compose(&user_sid, info3->base.domain_sid,
 206                             info3->base.rid);
 207                 sid_to_fstring(sidstr, &user_sid);
 208                 afsname = talloc_string_sub(mem_ctx, afsname,
 209                                             "%s", sidstr);
 210         }
 211
 212         if (afsname == NULL) {
 213                 return NT_STATUS_NO_MEMORY;
 214         }
 215
 216         strlower_m(afsname);
 217
 218         DEBUG(10, ("Generating token for user %s\n", afsname));
 219
 220         cell = strchr(afsname, '@');
 221
 222         if (cell == NULL) {
 223                 return NT_STATUS_NO_MEMORY;
 224         }
 225
 226         *cell = '\0';
 227         cell += 1;
 228
 229         token = afs_createtoken_str(afsname, cell);
 230         if (token == NULL) {
 231                 return NT_STATUS_OK;
 232         }
 233         resp->extra_data.data = talloc_strdup(mem_ctx, token);
 234         if (resp->extra_data.data == NULL) {
 235                 return NT_STATUS_NO_MEMORY;
 236         }
 237         resp->length += strlen((const char *)resp->extra_data.data)+1;
 238
 239         return NT_STATUS_OK;
 240 }
 241
 242 static NTSTATUS check_info3_in_group(struct netr_SamInfo3 *info3,
 243                                      const char *group_sid)
 244 /**
 245  * Check whether a user belongs to a group or list of groups.
 246  *
 247  * @param mem_ctx talloc memory context.
 248  * @param info3 user information, including group membership info.
 249  * @param group_sid One or more groups , separated by commas.
 250  *
 251  * @return NT_STATUS_OK on success,
 252  *    NT_STATUS_LOGON_FAILURE if the user does not belong,
 253  *    or other NT_STATUS_IS_ERR(status) for other kinds of failure.
 254  */
 255 {
 256         struct dom_sid *require_membership_of_sid;
 257         uint32_t num_require_membership_of_sid;
 258         char *req_sid;
 259         const char *p;
 260         struct dom_sid sid;
 261         size_t i;
 262         struct security_token *token;
 263         TALLOC_CTX *frame = talloc_stackframe();
 264         NTSTATUS status;
 265
 266         /* Parse the 'required group' SID */
 267
 268         if (!group_sid || !group_sid[0]) {
 269                 /* NO sid supplied, all users may access */
 270                 return NT_STATUS_OK;
 271         }
 272
 273         token = talloc_zero(talloc_tos(), struct security_token);
 274         if (token == NULL) {
 275                 DEBUG(0, ("talloc failed\n"));
 276                 TALLOC_FREE(frame);
 277                 return NT_STATUS_NO_MEMORY;
 278         }
 279
 280         num_require_membership_of_sid = 0;
 281         require_membership_of_sid = NULL;
 282
 283         p = group_sid;
 284
 285         while (next_token_talloc(talloc_tos(), &p, &req_sid, ",")) {
 286                 if (!string_to_sid(&sid, req_sid)) {
 287                         DEBUG(0, ("check_info3_in_group: could not parse %s "
 288                                   "as a SID!", req_sid));
 289                         TALLOC_FREE(frame);
 290                         return NT_STATUS_INVALID_PARAMETER;
 291                 }
 292
 293                 status = add_sid_to_array(talloc_tos(), &sid,
 294                                           &require_membership_of_sid,
 295                                           &num_require_membership_of_sid);
 296                 if (!NT_STATUS_IS_OK(status)) {
 297                         DEBUG(0, ("add_sid_to_array failed\n"));
 298                         TALLOC_FREE(frame);
 299                         return status;
 300                 }
 301         }
 302
 303         status = sid_array_from_info3(talloc_tos(), info3,
 304                                       &token->sids,
 305                                       &token->num_sids,
 306                                       true, false);
 307         if (!NT_STATUS_IS_OK(status)) {
 308                 TALLOC_FREE(frame);
 309                 return status;
 310         }
 311
 312         if (!NT_STATUS_IS_OK(status = add_aliases(get_global_sam_sid(),
 313                                                   token))
 314             || !NT_STATUS_IS_OK(status = add_aliases(&global_sid_Builtin,
 315                                                      token))) {
 316                 DEBUG(3, ("could not add aliases: %s\n",
 317                           nt_errstr(status)));
 318                 TALLOC_FREE(frame);
 319                 return status;
 320         }
 321
 322         security_token_debug(DBGC_CLASS, 10, token);
 323
 324         for (i=0; i<num_require_membership_of_sid; i++) {
 325                 DEBUG(10, ("Checking SID %s\n", sid_string_dbg(
 326                                    &require_membership_of_sid[i])));
 327                 if (nt_token_check_sid(&require_membership_of_sid[i],
 328                                        token)) {
 329                         DEBUG(10, ("Access ok\n"));
 330                         TALLOC_FREE(frame);
 331                         return NT_STATUS_OK;
 332                 }
 333         }
 334
 335         /* Do not distinguish this error from a wrong username/pw */
 336
 337         TALLOC_FREE(frame);
 338         return NT_STATUS_LOGON_FAILURE;
 339 }
 340
 341 struct winbindd_domain *find_auth_domain(uint8_t flags,
 342                                          const char *domain_name)
 343 {
 344         struct winbindd_domain *domain;
 345
 346         if (IS_DC) {
 347                 domain = find_domain_from_name_noinit(domain_name);
 348                 if (domain == NULL) {
 349                         DEBUG(3, ("Authentication for domain [%s] refused "
 350                                   "as it is not a trusted domain\n",
 351                                   domain_name));
 352                 }
 353                 return domain;
 354         }
 355
 356         if (strequal(domain_name, get_global_sam_name())) {
 357                 return find_domain_from_name_noinit(domain_name);
 358         }
 359
 360         /* we can auth against trusted domains */
 361         if (flags & WBFLAG_PAM_CONTACT_TRUSTDOM) {
 362                 domain = find_domain_from_name_noinit(domain_name);
 363                 if (domain == NULL) {
 364                         DEBUG(3, ("Authentication for domain [%s] skipped "
 365                                   "as it is not a trusted domain\n",
 366                                   domain_name));
 367                 } else {
 368                         return domain;
 369                 }
 370         }
 371
 372         return find_our_domain();
 373 }
 374
 375 static void fill_in_password_policy(struct winbindd_response *r,
 376                                     const struct samr_DomInfo1 *p)
 377 {
 378         r->data.auth.policy.min_length_password =
 379                 p->min_password_length;
 380         r->data.auth.policy.password_history =
 381                 p->password_history_length;
 382         r->data.auth.policy.password_properties =
 383                 p->password_properties;
 384         r->data.auth.policy.expire      =
 385                 nt_time_to_unix_abs((NTTIME *)&(p->max_password_age));
 386         r->data.auth.policy.min_passwordage =
 387                 nt_time_to_unix_abs((NTTIME *)&(p->min_password_age));
 388 }
 389
 390 static NTSTATUS fillup_password_policy(struct winbindd_domain *domain,
 391                                        struct winbindd_cli_state *state)
 392 {
 393         struct winbindd_methods *methods;
 394         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 395         struct samr_DomInfo1 password_policy;
 396
 397         if ( !winbindd_can_contact_domain( domain ) ) {
 398                 DEBUG(5,("fillup_password_policy: No inbound trust to "
 399                          "contact domain %s\n", domain->name));
 400                 return NT_STATUS_NOT_SUPPORTED;
 401         }
 402
 403         methods = domain->methods;
 404
 405         status = methods->password_policy(domain, state->mem_ctx, &password_policy);
 406         if (NT_STATUS_IS_ERR(status)) {
 407                 return status;
 408         }
 409
 410         fill_in_password_policy(state->response, &password_policy);
 411
 412         return NT_STATUS_OK;
 413 }
 414
 415 static NTSTATUS get_max_bad_attempts_from_lockout_policy(struct winbindd_domain *domain,
 416                                                          TALLOC_CTX *mem_ctx,
 417                                                          uint16 *lockout_threshold)
 418 {
 419         struct winbindd_methods *methods;
 420         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 421         struct samr_DomInfo12 lockout_policy;
 422
 423         *lockout_threshold = 0;
 424
 425         methods = domain->methods;
 426
 427         status = methods->lockout_policy(domain, mem_ctx, &lockout_policy);
 428         if (NT_STATUS_IS_ERR(status)) {
 429                 return status;
 430         }
 431
 432         *lockout_threshold = lockout_policy.lockout_threshold;
 433
 434         return NT_STATUS_OK;
 435 }
 436
 437 static NTSTATUS get_pwd_properties(struct winbindd_domain *domain,
 438                                    TALLOC_CTX *mem_ctx,
 439                                    uint32 *password_properties)
 440 {
 441         struct winbindd_methods *methods;
 442         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 443         struct samr_DomInfo1 password_policy;
 444
 445         *password_properties = 0;
 446
 447         methods = domain->methods;
 448
 449         status = methods->password_policy(domain, mem_ctx, &password_policy);
 450         if (NT_STATUS_IS_ERR(status)) {
 451                 return status;
 452         }
 453
 454         *password_properties = password_policy.password_properties;
 455
 456         return NT_STATUS_OK;
 457 }
 458
 459 #ifdef HAVE_KRB5
 460
 461 static const char *generate_krb5_ccache(TALLOC_CTX *mem_ctx,
 462                                         const char *type,
 463                                         uid_t uid,
 464                                         const char **user_ccache_file)
 465 {
 466         /* accept FILE and WRFILE as krb5_cc_type from the client and then
 467          * build the full ccname string based on the user's uid here -
 468          * Guenther*/
 469
 470         const char *gen_cc = NULL;
 471
 472         if (uid != -1) {
 473                 if (strequal(type, "FILE")) {
 474                         gen_cc = talloc_asprintf(
 475                                 mem_ctx, "FILE:/tmp/krb5cc_%d", uid);
 476                 }
 477                 if (strequal(type, "WRFILE")) {
 478                         gen_cc = talloc_asprintf(
 479                                 mem_ctx, "WRFILE:/tmp/krb5cc_%d", uid);
 480                 }
 481         }
 482
 483         *user_ccache_file = gen_cc;
 484
 485         if (gen_cc == NULL) {
 486                 gen_cc = talloc_strdup(mem_ctx, "MEMORY:winbindd_pam_ccache");
 487         }
 488         if (gen_cc == NULL) {
 489                 DEBUG(0,("out of memory\n"));
 490                 return NULL;
 491         }
 492
 493         DEBUG(10, ("using ccache: %s%s\n", gen_cc,
 494                    (*user_ccache_file == NULL) ? " (internal)":""));
 495
 496         return gen_cc;
 497 }
 498
 499 #endif
 500
 501 uid_t get_uid_from_request(struct winbindd_request *request)
 502 {
 503         uid_t uid;
 504
 505         uid = request->data.auth.uid;
 506
 507         if (uid < 0) {
 508                 DEBUG(1,("invalid uid: '%u'\n", (unsigned int)uid));
 509                 return -1;
 510         }
 511         return uid;
 512 }
 513
 514 static uid_t get_uid_from_state(struct winbindd_cli_state *state)
 515 {
 516         return get_uid_from_request(state->request);
 517 }
 518
 519 /**********************************************************************
 520  Authenticate a user with a clear text password using Kerberos and fill up
 521  ccache if required
 522  **********************************************************************/
 523
 524 static NTSTATUS winbindd_raw_kerberos_login(struct winbindd_domain *domain,
 525                                             struct winbindd_cli_state *state,
 526                                             struct netr_SamInfo3 **info3)
 527 {
 528 #ifdef HAVE_KRB5
 529         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
 530         krb5_error_code krb5_ret;
 531         const char *cc = NULL;
 532         const char *principal_s = NULL;
 533         const char *service = NULL;
 534         char *realm = NULL;
 535         fstring name_domain, name_user;
 536         time_t ticket_lifetime = 0;
 537         time_t renewal_until = 0;
 538         uid_t uid = -1;
 539         ADS_STRUCT *ads;
 540         time_t time_offset = 0;
 541         const char *user_ccache_file;
 542         struct PAC_LOGON_INFO *logon_info = NULL;
 543
 544         *info3 = NULL;
 545
 546         /* 1st step:
 547          * prepare a krb5_cc_cache string for the user */
 548
 549         uid = get_uid_from_state(state);
 550         if (uid == -1) {
 551                 DEBUG(0,("no valid uid\n"));
 552         }
 553
 554         cc = generate_krb5_ccache(state->mem_ctx,
 555                                   state->request->data.auth.krb5_cc_type,
 556                                   state->request->data.auth.uid,
 557                                   &user_ccache_file);
 558         if (cc == NULL) {
 559                 return NT_STATUS_NO_MEMORY;
 560         }
 561
 562
 563         /* 2nd step:
 564          * get kerberos properties */
 565
 566         if (domain->private_data) {
 567                 ads = (ADS_STRUCT *)domain->private_data;
 568                 time_offset = ads->auth.time_offset;
 569         }
 570
 571
 572         /* 3rd step:
 573          * do kerberos auth and setup ccache as the user */
 574
 575         parse_domain_user(state->request->data.auth.user, name_domain, name_user);
 576
 577         realm = domain->alt_name;
 578         strupper_m(realm);
 579
 580         principal_s = talloc_asprintf(state->mem_ctx, "%s@%s", name_user, realm);
 581         if (principal_s == NULL) {
 582                 return NT_STATUS_NO_MEMORY;
 583         }
 584
 585         service = talloc_asprintf(state->mem_ctx, "%s/%s@%s", KRB5_TGS_NAME, realm, realm);
 586         if (service == NULL) {
 587                 return NT_STATUS_NO_MEMORY;
 588         }
 589
 590         /* if this is a user ccache, we need to act as the user to let the krb5
 591          * library handle the chown, etc. */
 592
 593         /************************ ENTERING NON-ROOT **********************/
 594
 595         if (user_ccache_file != NULL) {
 596                 set_effective_uid(uid);
 597                 DEBUG(10,("winbindd_raw_kerberos_login: uid is %d\n", uid));
 598         }
 599
 600         result = kerberos_return_pac(state->mem_ctx,
 601                                      principal_s,
 602                                      state->request->data.auth.pass,
 603                                      time_offset,
 604                                      &ticket_lifetime,
 605                                      &renewal_until,
 606                                      cc,
 607                                      true,
 608                                      true,
 609                                      WINBINDD_PAM_AUTH_KRB5_RENEW_TIME,
 610                                      NULL,
 611                                      &logon_info);
 612         if (user_ccache_file != NULL) {
 613                 gain_root_privilege();
 614         }
 615
 616         /************************ RETURNED TO ROOT **********************/
 617
 618         if (!NT_STATUS_IS_OK(result)) {
 619                 goto failed;
 620         }
 621
 622         *info3 = &logon_info->info3;
 623
 624         DEBUG(10,("winbindd_raw_kerberos_login: winbindd validated ticket of %s\n",
 625                 principal_s));
 626
 627         /* if we had a user's ccache then return that string for the pam
 628          * environment */
 629
 630         if (user_ccache_file != NULL) {
 631
 632                 fstrcpy(state->response->data.auth.krb5ccname,
 633                         user_ccache_file);
 634
 635                 result = add_ccache_to_list(principal_s,
 636                                             cc,
 637                                             service,
 638                                             state->request->data.auth.user,
 639                                             realm,
 640                                             uid,
 641                                             time(NULL),
 642                                             ticket_lifetime,
 643                                             renewal_until,
 644                                             false);
 645
 646                 if (!NT_STATUS_IS_OK(result)) {
 647                         DEBUG(10,("winbindd_raw_kerberos_login: failed to add ccache to list: %s\n",
 648                                 nt_errstr(result)));
 649                 }
 650         } else {
 651
 652                 /* need to delete the memory cred cache, it is not used anymore */
 653
 654                 krb5_ret = ads_kdestroy(cc);
 655                 if (krb5_ret) {
 656                         DEBUG(3,("winbindd_raw_kerberos_login: "
 657                                  "could not destroy krb5 credential cache: "
 658                                  "%s\n", error_message(krb5_ret)));
 659                 }
 660
 661         }
 662
 663         return NT_STATUS_OK;
 664
 665 failed:
 666
 667         /* we could have created a new credential cache with a valid tgt in it
 668          * but we werent able to get or verify the service ticket for this
 669          * local host and therefor didn't get the PAC, we need to remove that
 670          * cache entirely now */
 671
 672         krb5_ret = ads_kdestroy(cc);
 673         if (krb5_ret) {
 674                 DEBUG(3,("winbindd_raw_kerberos_login: "
 675                          "could not destroy krb5 credential cache: "
 676                          "%s\n", error_message(krb5_ret)));
 677         }
 678
 679         if (!NT_STATUS_IS_OK(remove_ccache(state->request->data.auth.user))) {
 680                 DEBUG(3,("winbindd_raw_kerberos_login: "
 681                           "could not remove ccache for user %s\n",
 682                         state->request->data.auth.user));
 683         }
 684
 685         return result;
 686 #else
 687         return NT_STATUS_NOT_SUPPORTED;
 688 #endif /* HAVE_KRB5 */
 689 }
 690
 691 /****************************************************************
 692 ****************************************************************/
 693
 694 bool check_request_flags(uint32_t flags)
 695 {
 696         uint32_t flags_edata = WBFLAG_PAM_AFS_TOKEN |
 697                                WBFLAG_PAM_INFO3_TEXT |
 698                                WBFLAG_PAM_INFO3_NDR;
 699
 700         if ( ( (flags & flags_edata) == WBFLAG_PAM_AFS_TOKEN) ||
 701              ( (flags & flags_edata) == WBFLAG_PAM_INFO3_NDR) ||
 702              ( (flags & flags_edata) == WBFLAG_PAM_INFO3_TEXT)||
 703               !(flags & flags_edata) ) {
 704                 return true;
 705         }
 706
 707         DEBUG(1, ("check_request_flags: invalid request flags[0x%08X]\n",
 708                   flags));
 709
 710         return false;
 711 }
 712
 713 /****************************************************************
 714 ****************************************************************/
 715
 716 static NTSTATUS append_auth_data(TALLOC_CTX *mem_ctx,
 717                                  struct winbindd_response *resp,
 718                                  uint32_t request_flags,
 719                                  struct netr_SamInfo3 *info3,
 720                                  const char *name_domain,
 721                                  const char *name_user)
 722 {
 723         NTSTATUS result;
 724
 725         if (request_flags & WBFLAG_PAM_USER_SESSION_KEY) {
 726                 memcpy(resp->data.auth.user_session_key,
 727                        info3->base.key.key,
 728                        sizeof(resp->data.auth.user_session_key)
 729                        /* 16 */);
 730         }
 731
 732         if (request_flags & WBFLAG_PAM_LMKEY) {
 733                 memcpy(resp->data.auth.first_8_lm_hash,
 734                        info3->base.LMSessKey.key,
 735                        sizeof(resp->data.auth.first_8_lm_hash)
 736                        /* 8 */);
 737         }
 738
 739         if (request_flags & WBFLAG_PAM_UNIX_NAME) {
 740                 result = append_unix_username(mem_ctx, resp,
 741                                               info3, name_domain, name_user);
 742                 if (!NT_STATUS_IS_OK(result)) {
 743                         DEBUG(10,("Failed to append Unix Username: %s\n",
 744                                 nt_errstr(result)));
 745                         return result;
 746                 }
 747         }
 748
 749         /* currently, anything from here on potentially overwrites extra_data. */
 750
 751         if (request_flags & WBFLAG_PAM_INFO3_NDR) {
 752                 result = append_info3_as_ndr(mem_ctx, resp, info3);
 753                 if (!NT_STATUS_IS_OK(result)) {
 754                         DEBUG(10,("Failed to append INFO3 (NDR): %s\n",
 755                                 nt_errstr(result)));
 756                         return result;
 757                 }
 758         }
 759
 760         if (request_flags & WBFLAG_PAM_INFO3_TEXT) {
 761                 result = append_info3_as_txt(mem_ctx, resp, info3);
 762                 if (!NT_STATUS_IS_OK(result)) {
 763                         DEBUG(10,("Failed to append INFO3 (TXT): %s\n",
 764                                 nt_errstr(result)));
 765                         return result;
 766                 }
 767         }
 768
 769         if (request_flags & WBFLAG_PAM_AFS_TOKEN) {
 770                 result = append_afs_token(mem_ctx, resp,
 771                                           info3, name_domain, name_user);
 772                 if (!NT_STATUS_IS_OK(result)) {
 773                         DEBUG(10,("Failed to append AFS token: %s\n",
 774                                 nt_errstr(result)));
 775                         return result;
 776                 }
 777         }
 778
 779         return NT_STATUS_OK;
 780 }
 781
 782 static NTSTATUS winbindd_dual_pam_auth_cached(struct winbindd_domain *domain,
 783                                               struct winbindd_cli_state *state,
 784                                               struct netr_SamInfo3 **info3)
 785 {
 786         NTSTATUS result = NT_STATUS_LOGON_FAILURE;
 787         uint16 max_allowed_bad_attempts;
 788         fstring name_domain, name_user;
 789         struct dom_sid sid;
 790         enum lsa_SidType type;
 791         uchar new_nt_pass[NT_HASH_LEN];
 792         const uint8 *cached_nt_pass;
 793         const uint8 *cached_salt;
 794         struct netr_SamInfo3 *my_info3;
 795         time_t kickoff_time, must_change_time;
 796         bool password_good = false;
 797 #ifdef HAVE_KRB5
 798         struct winbindd_tdc_domain *tdc_domain = NULL;
 799 #endif
 800
 801         *info3 = NULL;
 802
 803         ZERO_STRUCTP(info3);
 804
 805         DEBUG(10,("winbindd_dual_pam_auth_cached\n"));
 806
 807         /* Parse domain and username */
 808
 809         parse_domain_user(state->request->data.auth.user, name_domain, name_user);
 810
 811
 812         if (!lookup_cached_name(name_domain,
 813                                 name_user,
 814                                 &sid,
 815                                 &type)) {
 816                 DEBUG(10,("winbindd_dual_pam_auth_cached: no such user in the cache\n"));
 817                 return NT_STATUS_NO_SUCH_USER;
 818         }
 819
 820         if (type != SID_NAME_USER) {
 821                 DEBUG(10,("winbindd_dual_pam_auth_cached: not a user (%s)\n", sid_type_lookup(type)));
 822                 return NT_STATUS_LOGON_FAILURE;
 823         }
 824
 825         result = winbindd_get_creds(domain,
 826                                     state->mem_ctx,
 827                                     &sid,
 828                                     &my_info3,
 829                                     &cached_nt_pass,
 830                                     &cached_salt);
 831         if (!NT_STATUS_IS_OK(result)) {
 832                 DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get creds: %s\n", nt_errstr(result)));
 833                 return result;
 834         }
 835
 836         *info3 = my_info3;
 837
 838         E_md4hash(state->request->data.auth.pass, new_nt_pass);
 839
 840         dump_data_pw("new_nt_pass", new_nt_pass, NT_HASH_LEN);
 841         dump_data_pw("cached_nt_pass", cached_nt_pass, NT_HASH_LEN);
 842         if (cached_salt) {
 843                 dump_data_pw("cached_salt", cached_salt, NT_HASH_LEN);
 844         }
 845
 846         if (cached_salt) {
 847                 /* In this case we didn't store the nt_hash itself,
 848                    but the MD5 combination of salt + nt_hash. */
 849                 uchar salted_hash[NT_HASH_LEN];
 850                 E_md5hash(cached_salt, new_nt_pass, salted_hash);
 851
 852                 password_good = (memcmp(cached_nt_pass, salted_hash,
 853                                         NT_HASH_LEN) == 0);
 854         } else {
 855                 /* Old cached cred - direct store of nt_hash (bad bad bad !). */
 856                 password_good = (memcmp(cached_nt_pass, new_nt_pass,
 857                                         NT_HASH_LEN) == 0);
 858         }
 859
 860         if (password_good) {
 861
 862                 /* User *DOES* know the password, update logon_time and reset
 863                  * bad_pw_count */
 864
 865                 my_info3->base.user_flags |= NETLOGON_CACHED_ACCOUNT;
 866
 867                 if (my_info3->base.acct_flags & ACB_AUTOLOCK) {
 868                         return NT_STATUS_ACCOUNT_LOCKED_OUT;
 869                 }
 870
 871                 if (my_info3->base.acct_flags & ACB_DISABLED) {
 872                         return NT_STATUS_ACCOUNT_DISABLED;
 873                 }
 874
 875                 if (my_info3->base.acct_flags & ACB_WSTRUST) {
 876                         return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
 877                 }
 878
 879                 if (my_info3->base.acct_flags & ACB_SVRTRUST) {
 880                         return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
 881                 }
 882
 883                 if (my_info3->base.acct_flags & ACB_DOMTRUST) {
 884                         return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
 885                 }
 886
 887                 if (!(my_info3->base.acct_flags & ACB_NORMAL)) {
 888                         DEBUG(0,("winbindd_dual_pam_auth_cached: whats wrong with that one?: 0x%08x\n",
 889                                 my_info3->base.acct_flags));
 890                         return NT_STATUS_LOGON_FAILURE;
 891                 }
 892
 893                 kickoff_time = nt_time_to_unix(my_info3->base.acct_expiry);
 894                 if (kickoff_time != 0 && time(NULL) > kickoff_time) {
 895                         return NT_STATUS_ACCOUNT_EXPIRED;
 896                 }
 897
 898                 must_change_time = nt_time_to_unix(my_info3->base.force_password_change);
 899                 if (must_change_time != 0 && must_change_time < time(NULL)) {
 900                         /* we allow grace logons when the password has expired */
 901                         my_info3->base.user_flags |= NETLOGON_GRACE_LOGON;
 902                         /* return NT_STATUS_PASSWORD_EXPIRED; */
 903                         goto success;
 904                 }
 905
 906 #ifdef HAVE_KRB5
 907                 if ((state->request->flags & WBFLAG_PAM_KRB5) &&
 908                     ((tdc_domain = wcache_tdc_fetch_domain(state->mem_ctx, name_domain)) != NULL) &&
 909                     ((tdc_domain->trust_type & NETR_TRUST_TYPE_UPLEVEL) ||
 910                     /* used to cope with the case winbindd starting without network. */
 911                     !strequal(tdc_domain->domain_name, tdc_domain->dns_name))) {
 912
 913                         uid_t uid = -1;
 914                         const char *cc = NULL;
 915                         char *realm = NULL;
 916                         const char *principal_s = NULL;
 917                         const char *service = NULL;
 918                         const char *user_ccache_file;
 919
 920                         uid = get_uid_from_state(state);
 921                         if (uid == -1) {
 922                                 DEBUG(0,("winbindd_dual_pam_auth_cached: invalid uid\n"));
 923                                 return NT_STATUS_INVALID_PARAMETER;
 924                         }
 925
 926                         cc = generate_krb5_ccache(state->mem_ctx,
 927                                                 state->request->data.auth.krb5_cc_type,
 928                                                 state->request->data.auth.uid,
 929                                                 &user_ccache_file);
 930                         if (cc == NULL) {
 931                                 return NT_STATUS_NO_MEMORY;
 932                         }
 933
 934                         realm = domain->alt_name;
 935                         strupper_m(realm);
 936
 937                         principal_s = talloc_asprintf(state->mem_ctx, "%s@%s", name_user, realm);
 938                         if (principal_s == NULL) {
 939                                 return NT_STATUS_NO_MEMORY;
 940                         }
 941
 942                         service = talloc_asprintf(state->mem_ctx, "%s/%s@%s", KRB5_TGS_NAME, realm, realm);
 943                         if (service == NULL) {
 944                                 return NT_STATUS_NO_MEMORY;
 945                         }
 946
 947                         if (user_ccache_file != NULL) {
 948
 949                                 fstrcpy(state->response->data.auth.krb5ccname,
 950                                         user_ccache_file);
 951
 952                                 result = add_ccache_to_list(principal_s,
 953                                                             cc,
 954                                                             service,
 955                                                             state->request->data.auth.user,
 956                                                             domain->alt_name,
 957                                                             uid,
 958                                                             time(NULL),
 959                                                             time(NULL) + lp_winbind_cache_time(),
 960                                                             time(NULL) + WINBINDD_PAM_AUTH_KRB5_RENEW_TIME,
 961                                                             true);
 962
 963                                 if (!NT_STATUS_IS_OK(result)) {
 964                                         DEBUG(10,("winbindd_dual_pam_auth_cached: failed "
 965                                                 "to add ccache to list: %s\n",
 966                                                 nt_errstr(result)));
 967                                 }
 968                         }
 969                 }
 970 #endif /* HAVE_KRB5 */
 971  success:
 972                 /* FIXME: we possibly should handle logon hours as well (does xp when
 973                  * offline?) see auth/auth_sam.c:sam_account_ok for details */
 974
 975                 unix_to_nt_time(&my_info3->base.last_logon, time(NULL));
 976                 my_info3->base.bad_password_count = 0;
 977
 978                 result = winbindd_update_creds_by_info3(domain,
 979                                                         state->request->data.auth.user,
 980                                                         state->request->data.auth.pass,
 981                                                         my_info3);
 982                 if (!NT_STATUS_IS_OK(result)) {
 983                         DEBUG(1,("winbindd_dual_pam_auth_cached: failed to update creds: %s\n",
 984                                 nt_errstr(result)));
 985                         return result;
 986                 }
 987
 988                 return NT_STATUS_OK;
 989
 990         }
 991
 992         /* User does *NOT* know the correct password, modify info3 accordingly */
 993
 994         /* failure of this is not critical */
 995         result = get_max_bad_attempts_from_lockout_policy(domain, state->mem_ctx, &max_allowed_bad_attempts);
 996         if (!NT_STATUS_IS_OK(result)) {
 997                 DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get max_allowed_bad_attempts. "
 998                           "Won't be able to honour account lockout policies\n"));
 999         }
1000
1001         /* increase counter */
1002         my_info3->base.bad_password_count++;
1003
1004         if (max_allowed_bad_attempts == 0) {
1005                 goto failed;
1006         }
1007
1008         /* lockout user */
1009         if (my_info3->base.bad_password_count >= max_allowed_bad_attempts) {
1010
1011                 uint32 password_properties;
1012
1013                 result = get_pwd_properties(domain, state->mem_ctx, &password_properties);
1014                 if (!NT_STATUS_IS_OK(result)) {
1015                         DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get password properties.\n"));
1016                 }
1017
1018                 if ((my_info3->base.rid != DOMAIN_RID_ADMINISTRATOR) ||
1019                     (password_properties & DOMAIN_PASSWORD_LOCKOUT_ADMINS)) {
1020                         my_info3->base.acct_flags |= ACB_AUTOLOCK;
1021                 }
1022         }
1023
1024 failed:
1025         result = winbindd_update_creds_by_info3(domain,
1026                                                 state->request->data.auth.user,
1027                                                 NULL,
1028                                                 my_info3);
1029
1030         if (!NT_STATUS_IS_OK(result)) {
1031                 DEBUG(0,("winbindd_dual_pam_auth_cached: failed to update creds %s\n",
1032                         nt_errstr(result)));
1033         }
1034
1035         return NT_STATUS_LOGON_FAILURE;
1036 }
1037
1038 static NTSTATUS winbindd_dual_pam_auth_kerberos(struct winbindd_domain *domain,
1039                                                 struct winbindd_cli_state *state,
1040                                                 struct netr_SamInfo3 **info3)
1041 {
1042         struct winbindd_domain *contact_domain;
1043         fstring name_domain, name_user;
1044         NTSTATUS result;
1045
1046         DEBUG(10,("winbindd_dual_pam_auth_kerberos\n"));
1047
1048         /* Parse domain and username */
1049
1050         parse_domain_user(state->request->data.auth.user, name_domain, name_user);
1051
1052         /* what domain should we contact? */
1053
1054         if ( IS_DC ) {
1055                 if (!(contact_domain = find_domain_from_name(name_domain))) {
1056                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
1057                                   state->request->data.auth.user, name_domain, name_user, name_domain));
1058                         result = NT_STATUS_NO_SUCH_USER;
1059                         goto done;
1060                 }
1061
1062         } else {
1063                 if (is_myname(name_domain)) {
1064                         DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
1065                         result =  NT_STATUS_NO_SUCH_USER;
1066                         goto done;
1067                 }
1068
1069                 contact_domain = find_domain_from_name(name_domain);
1070                 if (contact_domain == NULL) {
1071                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
1072                                   state->request->data.auth.user, name_domain, name_user, name_domain));
1073
1074                         contact_domain = find_our_domain();
1075                 }
1076         }
1077
1078         if (contact_domain->initialized &&
1079             contact_domain->active_directory) {
1080                 goto try_login;
1081         }
1082
1083         if (!contact_domain->initialized) {
1084                 init_dc_connection(contact_domain);
1085         }
1086
1087         if (!contact_domain->active_directory) {
1088                 DEBUG(3,("krb5 auth requested but domain is not Active Directory\n"));
1089                 return NT_STATUS_INVALID_LOGON_TYPE;
1090         }
1091 try_login:
1092         result = winbindd_raw_kerberos_login(contact_domain, state, info3);
1093 done:
1094         return result;
1095 }
1096
1097 static NTSTATUS winbindd_dual_auth_passdb(TALLOC_CTX *mem_ctx,
1098                                           const char *domain, const char *user,
1099                                           const DATA_BLOB *challenge,
1100                                           const DATA_BLOB *lm_resp,
1101                                           const DATA_BLOB *nt_resp,
1102                                           struct netr_SamInfo3 **pinfo3)
1103 {
1104         struct auth_usersupplied_info *user_info = NULL;
1105         NTSTATUS status;
1106
1107         status = make_user_info(&user_info, user, user, domain, domain,
1108                                 global_myname(), lm_resp, nt_resp, NULL, NULL,
1109                                 NULL, AUTH_PASSWORD_RESPONSE);
1110         if (!NT_STATUS_IS_OK(status)) {
1111                 DEBUG(10, ("make_user_info failed: %s\n", nt_errstr(status)));
1112                 return status;
1113         }
1114
1115         /* We don't want any more mapping of the username */
1116         user_info->mapped_state = True;
1117
1118         status = check_sam_security_info3(challenge, talloc_tos(), user_info,
1119                                           pinfo3);
1120         free_user_info(&user_info);
1121         DEBUG(10, ("Authenticaticating user %s\\%s returned %s\n", domain,
1122                    user, nt_errstr(status)));
1123         return status;
1124 }
1125
1126 typedef NTSTATUS (*netlogon_fn_t)(struct rpc_pipe_client *cli,
1127                                   TALLOC_CTX *mem_ctx,
1128                                   uint32 logon_parameters,
1129                                   const char *server,
1130                                   const char *username,
1131                                   const char *domain,
1132                                   const char *workstation,
1133                                   const uint8 chal[8],
1134                                   DATA_BLOB lm_response,
1135                                   DATA_BLOB nt_response,
1136                                   struct netr_SamInfo3 **info3);
1137
1138 static NTSTATUS winbindd_dual_pam_auth_samlogon(struct winbindd_domain *domain,
1139                                                 struct winbindd_cli_state *state,
1140                                                 struct netr_SamInfo3 **info3)
1141 {
1142
1143         struct rpc_pipe_client *netlogon_pipe;
1144         uchar chal[8];
1145         DATA_BLOB lm_resp;
1146         DATA_BLOB nt_resp;
1147         int attempts = 0;
1148         unsigned char local_nt_response[24];
1149         fstring name_domain, name_user;
1150         bool retry;
1151         NTSTATUS result;
1152         struct netr_SamInfo3 *my_info3 = NULL;
1153
1154         *info3 = NULL;
1155
1156         DEBUG(10,("winbindd_dual_pam_auth_samlogon\n"));
1157
1158         /* Parse domain and username */
1159
1160         parse_domain_user(state->request->data.auth.user, name_domain, name_user);
1161
1162         /* do password magic */
1163
1164         generate_random_buffer(chal, sizeof(chal));
1165
1166         if (lp_client_ntlmv2_auth()) {
1167                 DATA_BLOB server_chal;
1168                 DATA_BLOB names_blob;
1169                 server_chal = data_blob_const(chal, 8);
1170
1171                 /* note that the 'workgroup' here is for the local
1172                    machine.  The 'server name' must match the
1173                    'workstation' passed to the actual SamLogon call.
1174                 */
1175                 names_blob = NTLMv2_generate_names_blob(state->mem_ctx, global_myname(), lp_workgroup());
1176
1177                 if (!SMBNTLMv2encrypt(state->mem_ctx, name_user, name_domain,
1178                                       state->request->data.auth.pass,
1179                                       &server_chal,
1180                                       &names_blob,
1181                                       &lm_resp, &nt_resp, NULL, NULL)) {
1182                         data_blob_free(&names_blob);
1183                         DEBUG(0, ("winbindd_pam_auth: SMBNTLMv2encrypt() failed!\n"));
1184                         result = NT_STATUS_NO_MEMORY;
1185                         goto done;
1186                 }
1187                 data_blob_free(&names_blob);
1188         } else {
1189                 lm_resp = data_blob_null;
1190                 SMBNTencrypt(state->request->data.auth.pass,
1191                              chal,
1192                              local_nt_response);
1193
1194                 nt_resp = data_blob_talloc(state->mem_ctx,
1195                                            local_nt_response,
1196                                            sizeof(local_nt_response));
1197         }
1198
1199         if (strequal(name_domain, get_global_sam_name())) {
1200                 DATA_BLOB chal_blob = data_blob_const(chal, sizeof(chal));
1201
1202                 result = winbindd_dual_auth_passdb(
1203                         state->mem_ctx, name_domain, name_user,
1204                         &chal_blob, &lm_resp, &nt_resp, info3);
1205                 goto done;
1206         }
1207
1208         /* check authentication loop */
1209
1210         do {
1211                 netlogon_fn_t logon_fn;
1212
1213                 ZERO_STRUCTP(my_info3);
1214                 retry = false;
1215
1216                 result = cm_connect_netlogon(domain, &netlogon_pipe);
1217
1218                 if (!NT_STATUS_IS_OK(result)) {
1219                         DEBUG(3, ("could not open handle to NETLOGON pipe\n"));
1220                         goto done;
1221                 }
1222
1223                 /* It is really important to try SamLogonEx here,
1224                  * because in a clustered environment, we want to use
1225                  * one machine account from multiple physical
1226                  * computers.
1227                  *
1228                  * With a normal SamLogon call, we must keep the
1229                  * credentials chain updated and intact between all
1230                  * users of the machine account (which would imply
1231                  * cross-node communication for every NTLM logon).
1232                  *
1233                  * (The credentials chain is not per NETLOGON pipe
1234                  * connection, but globally on the server/client pair
1235                  * by machine name).
1236                  *
1237                  * When using SamLogonEx, the credentials are not
1238                  * supplied, but the session key is implied by the
1239                  * wrapping SamLogon context.
1240                  *
1241                  *  -- abartlet 21 April 2008
1242                  */
1243
1244                 logon_fn = domain->can_do_samlogon_ex
1245                         ? rpccli_netlogon_sam_network_logon_ex
1246                         : rpccli_netlogon_sam_network_logon;
1247
1248                 result = logon_fn(netlogon_pipe,
1249                                   state->mem_ctx,
1250                                   0,
1251                                   domain->dcname,         /* server name */
1252                                   name_user,              /* user name */
1253                                   name_domain,            /* target domain */
1254                                   global_myname(),        /* workstation */
1255                                   chal,
1256                                   lm_resp,
1257                                   nt_resp,
1258                                   &my_info3);
1259                 attempts += 1;
1260
1261                 if ((NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR)
1262                     && domain->can_do_samlogon_ex) {
1263                         DEBUG(3, ("Got a DC that can not do NetSamLogonEx, "
1264                                   "retrying with NetSamLogon\n"));
1265                         domain->can_do_samlogon_ex = false;
1266                         continue;
1267                 }
1268
1269                 /* We have to try a second time as cm_connect_netlogon
1270                    might not yet have noticed that the DC has killed
1271                    our connection. */
1272
1273                 if (!rpccli_is_connected(netlogon_pipe)) {
1274                         continue;
1275                 }
1276
1277                 /* if we get access denied, a possible cause was that we had
1278                    and open connection to the DC, but someone changed our
1279                    machine account password out from underneath us using 'net
1280                    rpc changetrustpw' */
1281
1282                 if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
1283                         DEBUG(3,("winbindd_pam_auth: sam_logon returned "
1284                                  "ACCESS_DENIED.  Maybe the trust account "
1285                                 "password was changed and we didn't know it. "
1286                                  "Killing connections to domain %s\n",
1287                                 name_domain));
1288                         invalidate_cm_connection(&domain->conn);
1289                         retry = true;
1290                 }
1291
1292         } while ( (attempts < 2) && retry );
1293
1294         /* handle the case where a NT4 DC does not fill in the acct_flags in
1295          * the samlogon reply info3. When accurate info3 is required by the
1296          * caller, we look up the account flags ourselve - gd */
1297
1298         if ((state->request->flags & WBFLAG_PAM_INFO3_TEXT) &&
1299             NT_STATUS_IS_OK(result) && (my_info3->base.acct_flags == 0)) {
1300
1301                 struct rpc_pipe_client *samr_pipe;
1302                 struct policy_handle samr_domain_handle, user_pol;
1303                 union samr_UserInfo *info = NULL;
1304                 NTSTATUS status_tmp;
1305                 uint32 acct_flags;
1306
1307                 status_tmp = cm_connect_sam(domain, state->mem_ctx,
1308                                             &samr_pipe, &samr_domain_handle);
1309
1310                 if (!NT_STATUS_IS_OK(status_tmp)) {
1311                         DEBUG(3, ("could not open handle to SAMR pipe: %s\n",
1312                                 nt_errstr(status_tmp)));
1313                         goto done;
1314                 }
1315
1316                 status_tmp = rpccli_samr_OpenUser(samr_pipe, state->mem_ctx,
1317                                                   &samr_domain_handle,
1318                                                   MAXIMUM_ALLOWED_ACCESS,
1319                                                   my_info3->base.rid,
1320                                                   &user_pol);
1321
1322                 if (!NT_STATUS_IS_OK(status_tmp)) {
1323                         DEBUG(3, ("could not open user handle on SAMR pipe: %s\n",
1324                                 nt_errstr(status_tmp)));
1325                         goto done;
1326                 }
1327
1328                 status_tmp = rpccli_samr_QueryUserInfo(samr_pipe, state->mem_ctx,
1329                                                        &user_pol,
1330                                                        16,
1331                                                        &info);
1332
1333                 if (!NT_STATUS_IS_OK(status_tmp)) {
1334                         DEBUG(3, ("could not query user info on SAMR pipe: %s\n",
1335                                 nt_errstr(status_tmp)));
1336                         rpccli_samr_Close(samr_pipe, state->mem_ctx, &user_pol);
1337                         goto done;
1338                 }
1339
1340                 acct_flags = info->info16.acct_flags;
1341
1342                 if (acct_flags == 0) {
1343                         rpccli_samr_Close(samr_pipe, state->mem_ctx, &user_pol);
1344                         goto done;
1345                 }
1346
1347                 my_info3->base.acct_flags = acct_flags;
1348
1349                 DEBUG(10,("successfully retrieved acct_flags 0x%x\n", acct_flags));
1350
1351                 rpccli_samr_Close(samr_pipe, state->mem_ctx, &user_pol);
1352         }
1353
1354         *info3 = my_info3;
1355 done:
1356         return result;
1357 }
1358
1359 enum winbindd_result winbindd_dual_pam_auth(struct winbindd_domain *domain,
1360                                             struct winbindd_cli_state *state)
1361 {
1362         NTSTATUS result = NT_STATUS_LOGON_FAILURE;
1363         NTSTATUS krb5_result = NT_STATUS_OK;
1364         fstring name_domain, name_user;
1365         char *mapped_user;
1366         fstring domain_user;
1367         struct netr_SamInfo3 *info3 = NULL;
1368         NTSTATUS name_map_status = NT_STATUS_UNSUCCESSFUL;
1369
1370         /* Ensure null termination */
1371         state->request->data.auth.user[sizeof(state->request->data.auth.user)-1]='\0';
1372
1373         /* Ensure null termination */
1374         state->request->data.auth.pass[sizeof(state->request->data.auth.pass)-1]='\0';
1375
1376         DEBUG(3, ("[%5lu]: dual pam auth %s\n", (unsigned long)state->pid,
1377                   state->request->data.auth.user));
1378
1379         /* Parse domain and username */
1380
1381         name_map_status = normalize_name_unmap(state->mem_ctx,
1382                                                state->request->data.auth.user,
1383                                                &mapped_user);
1384
1385         /* If the name normalization didnt' actually do anything,
1386            just use the original name */
1387
1388         if (!NT_STATUS_IS_OK(name_map_status) &&
1389             !NT_STATUS_EQUAL(name_map_status, NT_STATUS_FILE_RENAMED))
1390         {
1391                 mapped_user = state->request->data.auth.user;
1392         }
1393
1394         parse_domain_user(mapped_user, name_domain, name_user);
1395
1396         if ( mapped_user != state->request->data.auth.user ) {
1397                 fstr_sprintf( domain_user, "%s%c%s", name_domain,
1398                         *lp_winbind_separator(),
1399                         name_user );
1400                 safe_strcpy( state->request->data.auth.user, domain_user,
1401                              sizeof(state->request->data.auth.user)-1 );
1402         }
1403
1404         if (!domain->online) {
1405                 result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1406                 if (domain->startup) {
1407                         /* Logons are very important to users. If we're offline and
1408                            we get a request within the first 30 seconds of startup,
1409                            try very hard to find a DC and go online. */
1410
1411                         DEBUG(10,("winbindd_dual_pam_auth: domain: %s offline and auth "
1412                                 "request in startup mode.\n", domain->name ));
1413
1414                         winbindd_flush_negative_conn_cache(domain);
1415                         result = init_dc_connection(domain);
1416                 }
1417         }
1418
1419         DEBUG(10,("winbindd_dual_pam_auth: domain: %s last was %s\n", domain->name, domain->online ? "online":"offline"));
1420
1421         /* Check for Kerberos authentication */
1422         if (domain->online && (state->request->flags & WBFLAG_PAM_KRB5)) {
1423
1424                 result = winbindd_dual_pam_auth_kerberos(domain, state, &info3);
1425                 /* save for later */
1426                 krb5_result = result;
1427
1428
1429                 if (NT_STATUS_IS_OK(result)) {
1430                         DEBUG(10,("winbindd_dual_pam_auth_kerberos succeeded\n"));
1431                         goto process_result;
1432                 } else {
1433                         DEBUG(10,("winbindd_dual_pam_auth_kerberos failed: %s\n", nt_errstr(result)));
1434                 }
1435
1436                 if (NT_STATUS_EQUAL(result, NT_STATUS_NO_LOGON_SERVERS) ||
1437                     NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT) ||
1438                     NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
1439                         DEBUG(10,("winbindd_dual_pam_auth_kerberos setting domain to offline\n"));
1440                         set_domain_offline( domain );
1441                         goto cached_logon;
1442                 }
1443
1444                 /* there are quite some NT_STATUS errors where there is no
1445                  * point in retrying with a samlogon, we explictly have to take
1446                  * care not to increase the bad logon counter on the DC */
1447
1448                 if (NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_DISABLED) ||
1449                     NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_EXPIRED) ||
1450                     NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_LOCKED_OUT) ||
1451                     NT_STATUS_EQUAL(result, NT_STATUS_INVALID_LOGON_HOURS) ||
1452                     NT_STATUS_EQUAL(result, NT_STATUS_INVALID_WORKSTATION) ||
1453                     NT_STATUS_EQUAL(result, NT_STATUS_LOGON_FAILURE) ||
1454                     NT_STATUS_EQUAL(result, NT_STATUS_NO_SUCH_USER) ||
1455                     NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_EXPIRED) ||
1456                     NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_MUST_CHANGE) ||
1457                     NT_STATUS_EQUAL(result, NT_STATUS_WRONG_PASSWORD)) {
1458                         goto done;
1459                 }
1460
1461                 if (state->request->flags & WBFLAG_PAM_FALLBACK_AFTER_KRB5) {
1462                         DEBUG(3,("falling back to samlogon\n"));
1463                         goto sam_logon;
1464                 } else {
1465                         goto cached_logon;
1466                 }
1467         }
1468
1469 sam_logon:
1470         /* Check for Samlogon authentication */
1471         if (domain->online) {
1472                 result = winbindd_dual_pam_auth_samlogon(domain, state, &info3);
1473
1474                 if (NT_STATUS_IS_OK(result)) {
1475                         DEBUG(10,("winbindd_dual_pam_auth_samlogon succeeded\n"));
1476                         /* add the Krb5 err if we have one */
1477                         if ( NT_STATUS_EQUAL(krb5_result, NT_STATUS_TIME_DIFFERENCE_AT_DC ) ) {
1478                                 info3->base.user_flags |= LOGON_KRB5_FAIL_CLOCK_SKEW;
1479                         }
1480                         goto process_result;
1481                 }
1482
1483                 DEBUG(10,("winbindd_dual_pam_auth_samlogon failed: %s\n",
1484                           nt_errstr(result)));
1485
1486                 if (NT_STATUS_EQUAL(result, NT_STATUS_NO_LOGON_SERVERS) ||
1487                     NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT) ||
1488                     NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND))
1489                 {
1490                         DEBUG(10,("winbindd_dual_pam_auth_samlogon setting domain to offline\n"));
1491                         set_domain_offline( domain );
1492                         goto cached_logon;
1493                 }
1494
1495                         if (domain->online) {
1496                                 /* We're still online - fail. */
1497                                 goto done;
1498                         }
1499         }
1500
1501 cached_logon:
1502         /* Check for Cached logons */
1503         if (!domain->online && (state->request->flags & WBFLAG_PAM_CACHED_LOGIN) &&
1504             lp_winbind_offline_logon()) {
1505
1506                 result = winbindd_dual_pam_auth_cached(domain, state, &info3);
1507
1508                 if (NT_STATUS_IS_OK(result)) {
1509                         DEBUG(10,("winbindd_dual_pam_auth_cached succeeded\n"));
1510                         goto process_result;
1511                 } else {
1512                         DEBUG(10,("winbindd_dual_pam_auth_cached failed: %s\n", nt_errstr(result)));
1513                         goto done;
1514                 }
1515         }
1516
1517 process_result:
1518
1519         if (NT_STATUS_IS_OK(result)) {
1520
1521                 struct dom_sid user_sid;
1522
1523                 /* In all codepaths where result == NT_STATUS_OK info3 must have
1524                    been initialized. */
1525                 if (!info3) {
1526                         result = NT_STATUS_INTERNAL_ERROR;
1527                         goto done;
1528                 }
1529
1530                 wcache_invalidate_samlogon(find_domain_from_name(name_domain), info3);
1531                 netsamlogon_cache_store(name_user, info3);
1532
1533                 /* save name_to_sid info as early as possible (only if
1534                    this is our primary domain so we don't invalidate
1535                    the cache entry by storing the seq_num for the wrong
1536                    domain). */
1537                 if ( domain->primary ) {
1538                         sid_compose(&user_sid, info3->base.domain_sid,
1539                                     info3->base.rid);
1540                         cache_name2sid(domain, name_domain, name_user,
1541                                        SID_NAME_USER, &user_sid);
1542                 }
1543
1544                 /* Check if the user is in the right group */
1545
1546                 result = check_info3_in_group(
1547                         info3,
1548                         state->request->data.auth.require_membership_of_sid);
1549                 if (!NT_STATUS_IS_OK(result)) {
1550                         DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
1551                                   state->request->data.auth.user,
1552                                   state->request->data.auth.require_membership_of_sid));
1553                         goto done;
1554                 }
1555
1556                 result = append_auth_data(state->mem_ctx, state->response,
1557                                           state->request->flags, info3,
1558                                           name_domain, name_user);
1559                 if (!NT_STATUS_IS_OK(result)) {
1560                         goto done;
1561                 }
1562
1563                 if ((state->request->flags & WBFLAG_PAM_CACHED_LOGIN)
1564                     && lp_winbind_offline_logon()) {
1565
1566                         result = winbindd_store_creds(domain,
1567                                                       state->request->data.auth.user,
1568                                                       state->request->data.auth.pass,
1569                                                       info3);
1570                 }
1571
1572                 if (state->request->flags & WBFLAG_PAM_GET_PWD_POLICY) {
1573                         struct winbindd_domain *our_domain = find_our_domain();
1574
1575                         /* This is not entirely correct I believe, but it is
1576                            consistent.  Only apply the password policy settings
1577                            too warn users for our own domain.  Cannot obtain these
1578                            from trusted DCs all the  time so don't do it at all.
1579                            -- jerry */
1580
1581                         result = NT_STATUS_NOT_SUPPORTED;
1582                         if (our_domain == domain ) {
1583                                 result = fillup_password_policy(our_domain, state);
1584                         }
1585
1586                         if (!NT_STATUS_IS_OK(result)
1587                             && !NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED) )
1588                         {
1589                                 DEBUG(10,("Failed to get password policies for domain %s: %s\n",
1590                                           domain->name, nt_errstr(result)));
1591                                 goto done;
1592                         }
1593                 }
1594
1595                 result = NT_STATUS_OK;
1596         }
1597
1598 done:
1599         /* give us a more useful (more correct?) error code */
1600         if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) ||
1601             (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
1602                 result = NT_STATUS_NO_LOGON_SERVERS;
1603         }
1604
1605         set_auth_errors(state->response, result);
1606
1607         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n",
1608               state->request->data.auth.user,
1609               state->response->data.auth.nt_status_string,
1610               state->response->data.auth.pam_error));
1611
1612         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
1613 }
1614
1615 enum winbindd_result winbindd_dual_pam_auth_crap(struct winbindd_domain *domain,
1616                                                  struct winbindd_cli_state *state)
1617 {
1618         NTSTATUS result;
1619         struct netr_SamInfo3 *info3 = NULL;
1620         struct rpc_pipe_client *netlogon_pipe;
1621         const char *name_user = NULL;
1622         const char *name_domain = NULL;
1623         const char *workstation;
1624         int attempts = 0;
1625         bool retry;
1626
1627         DATA_BLOB lm_resp, nt_resp;
1628
1629         /* This is child-only, so no check for privileged access is needed
1630            anymore */
1631
1632         /* Ensure null termination */
1633         state->request->data.auth_crap.user[sizeof(state->request->data.auth_crap.user)-1]=0;
1634         state->request->data.auth_crap.domain[sizeof(state->request->data.auth_crap.domain)-1]=0;
1635
1636         name_user = state->request->data.auth_crap.user;
1637         name_domain = state->request->data.auth_crap.domain;
1638         workstation = state->request->data.auth_crap.workstation;
1639
1640         DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid,
1641                   name_domain, name_user));
1642
1643         if (state->request->data.auth_crap.lm_resp_len > sizeof(state->request->data.auth_crap.lm_resp)
1644                 || state->request->data.auth_crap.nt_resp_len > sizeof(state->request->data.auth_crap.nt_resp)) {
1645                 if (!(state->request->flags & WBFLAG_BIG_NTLMV2_BLOB) ||
1646                      state->request->extra_len != state->request->data.auth_crap.nt_resp_len) {
1647                         DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n",
1648                                   state->request->data.auth_crap.lm_resp_len,
1649                                   state->request->data.auth_crap.nt_resp_len));
1650                         result = NT_STATUS_INVALID_PARAMETER;
1651                         goto done;
1652                 }
1653         }
1654
1655         lm_resp = data_blob_talloc(state->mem_ctx, state->request->data.auth_crap.lm_resp,
1656                                         state->request->data.auth_crap.lm_resp_len);
1657
1658         if (state->request->flags & WBFLAG_BIG_NTLMV2_BLOB) {
1659                 nt_resp = data_blob_talloc(state->mem_ctx,
1660                                            state->request->extra_data.data,
1661                                            state->request->data.auth_crap.nt_resp_len);
1662         } else {
1663                 nt_resp = data_blob_talloc(state->mem_ctx,
1664                                            state->request->data.auth_crap.nt_resp,
1665                                            state->request->data.auth_crap.nt_resp_len);
1666         }
1667
1668         if (strequal(name_domain, get_global_sam_name())) {
1669                 DATA_BLOB chal_blob = data_blob_const(
1670                         state->request->data.auth_crap.chal,
1671                         sizeof(state->request->data.auth_crap.chal));
1672
1673                 result = winbindd_dual_auth_passdb(
1674                         state->mem_ctx, name_domain, name_user,
1675                         &chal_blob, &lm_resp, &nt_resp, &info3);
1676                 goto process_result;
1677         }
1678
1679         do {
1680                 netlogon_fn_t logon_fn;
1681
1682                 retry = false;
1683
1684                 netlogon_pipe = NULL;
1685                 result = cm_connect_netlogon(domain, &netlogon_pipe);
1686
1687                 if (!NT_STATUS_IS_OK(result)) {
1688                         DEBUG(3, ("could not open handle to NETLOGON pipe (error: %s)\n",
1689                                   nt_errstr(result)));
1690                         goto done;
1691                 }
1692
1693                 logon_fn = domain->can_do_samlogon_ex
1694                         ? rpccli_netlogon_sam_network_logon_ex
1695                         : rpccli_netlogon_sam_network_logon;
1696
1697                 result = logon_fn(netlogon_pipe,
1698                                   state->mem_ctx,
1699                                   state->request->data.auth_crap.logon_parameters,
1700                                   domain->dcname,
1701                                   name_user,
1702                                   name_domain,
1703                                   /* Bug #3248 - found by Stefan Burkei. */
1704                                   workstation, /* We carefully set this above so use it... */
1705                                   state->request->data.auth_crap.chal,
1706                                   lm_resp,
1707                                   nt_resp,
1708                                   &info3);
1709
1710                 if ((NT_STATUS_V(result) == DCERPC_FAULT_OP_RNG_ERROR)
1711                     && domain->can_do_samlogon_ex) {
1712                         DEBUG(3, ("Got a DC that can not do NetSamLogonEx, "
1713                                   "retrying with NetSamLogon\n"));
1714                         domain->can_do_samlogon_ex = false;
1715                         continue;
1716                 }
1717
1718                 attempts += 1;
1719
1720                 /* We have to try a second time as cm_connect_netlogon
1721                    might not yet have noticed that the DC has killed
1722                    our connection. */
1723
1724                 if (!rpccli_is_connected(netlogon_pipe)) {
1725                         continue;
1726                 }
1727
1728                 /* if we get access denied, a possible cause was that we had and open
1729                    connection to the DC, but someone changed our machine account password
1730                    out from underneath us using 'net rpc changetrustpw' */
1731
1732                 if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
1733                         DEBUG(3,("winbindd_pam_auth: sam_logon returned "
1734                                  "ACCESS_DENIED.  Maybe the trust account "
1735                                 "password was changed and we didn't know it. "
1736                                  "Killing connections to domain %s\n",
1737                                 name_domain));
1738                         invalidate_cm_connection(&domain->conn);
1739                         retry = true;
1740                 }
1741
1742         } while ( (attempts < 2) && retry );
1743
1744 process_result:
1745
1746         if (NT_STATUS_IS_OK(result)) {
1747
1748                 wcache_invalidate_samlogon(find_domain_from_name(name_domain), info3);
1749                 netsamlogon_cache_store(name_user, info3);
1750
1751                 /* Check if the user is in the right group */
1752
1753                 result = check_info3_in_group(
1754                         info3,
1755                         state->request->data.auth_crap.require_membership_of_sid);
1756                 if (!NT_STATUS_IS_OK(result)) {
1757                         DEBUG(3, ("User %s is not in the required group (%s), so "
1758                                   "crap authentication is rejected\n",
1759                                   state->request->data.auth_crap.user,
1760                                   state->request->data.auth_crap.require_membership_of_sid));
1761                         goto done;
1762                 }
1763
1764                 result = append_auth_data(state->mem_ctx, state->response,
1765                                           state->request->flags, info3,
1766                                           name_domain, name_user);
1767                 if (!NT_STATUS_IS_OK(result)) {
1768                         goto done;
1769                 }
1770         }
1771
1772 done:
1773
1774         /* give us a more useful (more correct?) error code */
1775         if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) ||
1776             (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
1777                 result = NT_STATUS_NO_LOGON_SERVERS;
1778         }
1779
1780         if (state->request->flags & WBFLAG_PAM_NT_STATUS_SQUASH) {
1781                 result = nt_status_squash(result);
1782         }
1783
1784         set_auth_errors(state->response, result);
1785
1786         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
1787               ("NTLM CRAP authentication for user [%s]\\[%s] returned %s (PAM: %d)\n",
1788                name_domain,
1789                name_user,
1790                state->response->data.auth.nt_status_string,
1791                state->response->data.auth.pam_error));
1792
1793         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
1794 }
1795
1796 enum winbindd_result winbindd_dual_pam_chauthtok(struct winbindd_domain *contact_domain,
1797                                                  struct winbindd_cli_state *state)
1798 {
1799         char *oldpass;
1800         char *newpass = NULL;
1801         struct policy_handle dom_pol;
1802         struct rpc_pipe_client *cli = NULL;
1803         bool got_info = false;
1804         struct samr_DomInfo1 *info = NULL;
1805         struct userPwdChangeFailureInformation *reject = NULL;
1806         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
1807         fstring domain, user;
1808
1809         ZERO_STRUCT(dom_pol);
1810
1811         DEBUG(3, ("[%5lu]: dual pam chauthtok %s\n", (unsigned long)state->pid,
1812                   state->request->data.auth.user));
1813
1814         if (!parse_domain_user(state->request->data.chauthtok.user, domain, user)) {
1815                 goto done;
1816         }
1817
1818         /* Change password */
1819
1820         oldpass = state->request->data.chauthtok.oldpass;
1821         newpass = state->request->data.chauthtok.newpass;
1822
1823         /* Initialize reject reason */
1824         state->response->data.auth.reject_reason = Undefined;
1825
1826         /* Get sam handle */
1827
1828         result = cm_connect_sam(contact_domain, state->mem_ctx, &cli,
1829                                 &dom_pol);
1830         if (!NT_STATUS_IS_OK(result)) {
1831                 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
1832                 goto done;
1833         }
1834
1835         result = rpccli_samr_chgpasswd_user3(cli, state->mem_ctx,
1836                                              user,
1837                                              newpass,
1838                                              oldpass,
1839                                              &info,
1840                                              &reject);
1841
1842         /* Windows 2003 returns NT_STATUS_PASSWORD_RESTRICTION */
1843
1844         if (NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_RESTRICTION) ) {
1845
1846                 fill_in_password_policy(state->response, info);
1847
1848                 state->response->data.auth.reject_reason =
1849                         reject->extendedFailureReason;
1850
1851                 got_info = true;
1852         }
1853
1854         /* atm the pidl generated rpccli_samr_ChangePasswordUser3 function will
1855          * return with NT_STATUS_BUFFER_TOO_SMALL for w2k dcs as w2k just
1856          * returns with 4byte error code (NT_STATUS_NOT_SUPPORTED) which is too
1857          * short to comply with the samr_ChangePasswordUser3 idl - gd */
1858
1859         /* only fallback when the chgpasswd_user3 call is not supported */
1860         if ((NT_STATUS_EQUAL(result, NT_STATUS(DCERPC_FAULT_OP_RNG_ERROR))) ||
1861                    (NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED)) ||
1862                    (NT_STATUS_EQUAL(result, NT_STATUS_BUFFER_TOO_SMALL)) ||
1863                    (NT_STATUS_EQUAL(result, NT_STATUS_NOT_IMPLEMENTED))) {
1864
1865                 DEBUG(10,("Password change with chgpasswd_user3 failed with: %s, retrying chgpasswd_user2\n",
1866                         nt_errstr(result)));
1867
1868                 result = rpccli_samr_chgpasswd_user2(cli, state->mem_ctx, user, newpass, oldpass);
1869
1870                 /* Windows 2000 returns NT_STATUS_ACCOUNT_RESTRICTION.
1871                    Map to the same status code as Windows 2003. */
1872
1873                 if ( NT_STATUS_EQUAL(NT_STATUS_ACCOUNT_RESTRICTION, result ) ) {
1874                         result = NT_STATUS_PASSWORD_RESTRICTION;
1875                 }
1876         }
1877
1878 done:
1879
1880         if (NT_STATUS_IS_OK(result)
1881             && (state->request->flags & WBFLAG_PAM_CACHED_LOGIN)
1882             && lp_winbind_offline_logon()) {
1883                 result = winbindd_update_creds_by_name(contact_domain, user,
1884                                                        newpass);
1885                 /* Again, this happens when we login from gdm or xdm
1886                  * and the password expires, *BUT* cached crendentials
1887                  * doesn't exist. winbindd_update_creds_by_name()
1888                  * returns NT_STATUS_NO_SUCH_USER.
1889                  * This is not a failure.
1890                  * --- BoYang
1891                  * */
1892                 if (NT_STATUS_EQUAL(result, NT_STATUS_NO_SUCH_USER)) {
1893                         result = NT_STATUS_OK;
1894                 }
1895
1896                 if (!NT_STATUS_IS_OK(result)) {
1897                         DEBUG(10, ("Failed to store creds: %s\n",
1898                                    nt_errstr(result)));
1899                         goto process_result;
1900                 }
1901         }
1902
1903         if (!NT_STATUS_IS_OK(result) && !got_info && contact_domain) {
1904
1905                 NTSTATUS policy_ret;
1906
1907                 policy_ret = fillup_password_policy(contact_domain, state);
1908
1909                 /* failure of this is non critical, it will just provide no
1910                  * additional information to the client why the change has
1911                  * failed - Guenther */
1912
1913                 if (!NT_STATUS_IS_OK(policy_ret)) {
1914                         DEBUG(10,("Failed to get password policies: %s\n", nt_errstr(policy_ret)));
1915                         goto process_result;
1916                 }
1917         }
1918
1919 process_result:
1920
1921         if (strequal(contact_domain->name, get_global_sam_name())) {
1922                 /* FIXME: internal rpc pipe does not cache handles yet */
1923                 if (cli) {
1924                         if (is_valid_policy_hnd(&dom_pol)) {
1925                                 rpccli_samr_Close(cli, state->mem_ctx, &dom_pol);
1926                         }
1927                         TALLOC_FREE(cli);
1928                 }
1929         }
1930
1931         set_auth_errors(state->response, result);
1932
1933         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
1934               ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
1935                domain,
1936                user,
1937                state->response->data.auth.nt_status_string,
1938                state->response->data.auth.pam_error));
1939
1940         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
1941 }
1942
1943 enum winbindd_result winbindd_dual_pam_logoff(struct winbindd_domain *domain,
1944                                               struct winbindd_cli_state *state)
1945 {
1946         NTSTATUS result = NT_STATUS_NOT_SUPPORTED;
1947
1948         DEBUG(3, ("[%5lu]: pam dual logoff %s\n", (unsigned long)state->pid,
1949                 state->request->data.logoff.user));
1950
1951         if (!(state->request->flags & WBFLAG_PAM_KRB5)) {
1952                 result = NT_STATUS_OK;
1953                 goto process_result;
1954         }
1955
1956         if (state->request->data.logoff.krb5ccname[0] == '\0') {
1957                 result = NT_STATUS_OK;
1958                 goto process_result;
1959         }
1960
1961 #ifdef HAVE_KRB5
1962
1963         if (state->request->data.logoff.uid < 0) {
1964                 DEBUG(0,("winbindd_pam_logoff: invalid uid\n"));
1965                 goto process_result;
1966         }
1967
1968         /* what we need here is to find the corresponding krb5 ccache name *we*
1969          * created for a given username and destroy it */
1970
1971         if (!ccache_entry_exists(state->request->data.logoff.user)) {
1972                 result = NT_STATUS_OK;
1973                 DEBUG(10,("winbindd_pam_logoff: no entry found.\n"));
1974                 goto process_result;
1975         }
1976
1977         if (!ccache_entry_identical(state->request->data.logoff.user,
1978                                         state->request->data.logoff.uid,
1979                                         state->request->data.logoff.krb5ccname)) {
1980                 DEBUG(0,("winbindd_pam_logoff: cached entry differs.\n"));
1981                 goto process_result;
1982         }
1983
1984         result = remove_ccache(state->request->data.logoff.user);
1985         if (!NT_STATUS_IS_OK(result)) {
1986                 DEBUG(0,("winbindd_pam_logoff: failed to remove ccache: %s\n",
1987                         nt_errstr(result)));
1988                 goto process_result;
1989         }
1990
1991 #else
1992         result = NT_STATUS_NOT_SUPPORTED;
1993 #endif
1994
1995 process_result:
1996
1997
1998         set_auth_errors(state->response, result);
1999
2000         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2001 }
2002
2003 /* Change user password with auth crap*/
2004
2005 enum winbindd_result winbindd_dual_pam_chng_pswd_auth_crap(struct winbindd_domain *domainSt, struct winbindd_cli_state *state)
2006 {
2007         NTSTATUS result;
2008         DATA_BLOB new_nt_password;
2009         DATA_BLOB old_nt_hash_enc;
2010         DATA_BLOB new_lm_password;
2011         DATA_BLOB old_lm_hash_enc;
2012         fstring  domain,user;
2013         struct policy_handle dom_pol;
2014         struct winbindd_domain *contact_domain = domainSt;
2015         struct rpc_pipe_client *cli = NULL;
2016
2017         ZERO_STRUCT(dom_pol);
2018
2019         /* Ensure null termination */
2020         state->request->data.chng_pswd_auth_crap.user[
2021                 sizeof(state->request->data.chng_pswd_auth_crap.user)-1]=0;
2022         state->request->data.chng_pswd_auth_crap.domain[
2023                 sizeof(state->request->data.chng_pswd_auth_crap.domain)-1]=0;
2024         *domain = 0;
2025         *user = 0;
2026
2027         DEBUG(3, ("[%5lu]: pam change pswd auth crap domain: %s user: %s\n",
2028                   (unsigned long)state->pid,
2029                   state->request->data.chng_pswd_auth_crap.domain,
2030                   state->request->data.chng_pswd_auth_crap.user));
2031
2032         if (lp_winbind_offline_logon()) {
2033                 DEBUG(0,("Refusing password change as winbind offline logons are enabled. "));
2034                 DEBUGADD(0,("Changing passwords here would risk inconsistent logons\n"));
2035                 result = NT_STATUS_ACCESS_DENIED;
2036                 goto done;
2037         }
2038
2039         if (*state->request->data.chng_pswd_auth_crap.domain) {
2040                 fstrcpy(domain,state->request->data.chng_pswd_auth_crap.domain);
2041         } else {
2042                 parse_domain_user(state->request->data.chng_pswd_auth_crap.user,
2043                                   domain, user);
2044
2045                 if(!*domain) {
2046                         DEBUG(3,("no domain specified with username (%s) - "
2047                                  "failing auth\n",
2048                                  state->request->data.chng_pswd_auth_crap.user));
2049                         result = NT_STATUS_NO_SUCH_USER;
2050                         goto done;
2051                 }
2052         }
2053
2054         if (!*domain && lp_winbind_use_default_domain()) {
2055                 fstrcpy(domain,(char *)lp_workgroup());
2056         }
2057
2058         if(!*user) {
2059                 fstrcpy(user, state->request->data.chng_pswd_auth_crap.user);
2060         }
2061
2062         DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n",
2063                   (unsigned long)state->pid, domain, user));
2064
2065         /* Change password */
2066         new_nt_password = data_blob_const(
2067                 state->request->data.chng_pswd_auth_crap.new_nt_pswd,
2068                 state->request->data.chng_pswd_auth_crap.new_nt_pswd_len);
2069
2070         old_nt_hash_enc = data_blob_const(
2071                 state->request->data.chng_pswd_auth_crap.old_nt_hash_enc,
2072                 state->request->data.chng_pswd_auth_crap.old_nt_hash_enc_len);
2073
2074         if(state->request->data.chng_pswd_auth_crap.new_lm_pswd_len > 0)        {
2075                 new_lm_password = data_blob_const(
2076                         state->request->data.chng_pswd_auth_crap.new_lm_pswd,
2077                         state->request->data.chng_pswd_auth_crap.new_lm_pswd_len);
2078
2079                 old_lm_hash_enc = data_blob_const(
2080                         state->request->data.chng_pswd_auth_crap.old_lm_hash_enc,
2081                         state->request->data.chng_pswd_auth_crap.old_lm_hash_enc_len);
2082         } else {
2083                 new_lm_password.length = 0;
2084                 old_lm_hash_enc.length = 0;
2085         }
2086
2087         /* Get sam handle */
2088
2089         result = cm_connect_sam(contact_domain, state->mem_ctx, &cli, &dom_pol);
2090         if (!NT_STATUS_IS_OK(result)) {
2091                 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
2092                 goto done;
2093         }
2094
2095         result = rpccli_samr_chng_pswd_auth_crap(
2096                 cli, state->mem_ctx, user, new_nt_password, old_nt_hash_enc,
2097                 new_lm_password, old_lm_hash_enc);
2098
2099  done:
2100
2101         if (strequal(contact_domain->name, get_global_sam_name())) {
2102                 /* FIXME: internal rpc pipe does not cache handles yet */
2103                 if (cli) {
2104                         if (is_valid_policy_hnd(&dom_pol)) {
2105                                 rpccli_samr_Close(cli, state->mem_ctx, &dom_pol);
2106                         }
2107                         TALLOC_FREE(cli);
2108                 }
2109         }
2110
2111         set_auth_errors(state->response, result);
2112
2113         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
2114               ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
2115                domain, user,
2116                state->response->data.auth.nt_status_string,
2117                state->response->data.auth.pam_error));
2118
2119         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2120 }