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 "libsmb/namequery.h"
  28 #include "../libcli/auth/libcli_auth.h"
  29 #include "../librpc/gen_ndr/ndr_samr_c.h"
  30 #include "rpc_client/cli_pipe.h"
  31 #include "rpc_client/cli_samr.h"
  32 #include "../librpc/gen_ndr/ndr_netlogon.h"
  33 #include "rpc_client/cli_netlogon.h"
  34 #include "smb_krb5.h"
  35 #include "../lib/crypto/arcfour.h"
  36 #include "../libcli/security/security.h"
  37 #include "ads.h"
  38 #include "../librpc/gen_ndr/krb5pac.h"
  39 #include "passdb/machine_sid.h"
  40 #include "auth.h"
  41 #include "../lib/tsocket/tsocket.h"
  42 #include "auth/kerberos/pac_utils.h"
  43 #include "auth/gensec/gensec.h"
  44 #include "librpc/crypto/gse_krb5.h"
  45 #include "lib/afs/afs_funcs.h"
  46 #include "libsmb/samlogon_cache.h"
  47 #include "rpc_client/util_netlogon.h"
  48
  49 #undef DBGC_CLASS
  50 #define DBGC_CLASS DBGC_WINBIND
  51
  52 #define LOGON_KRB5_FAIL_CLOCK_SKEW      0x02000000
  53
  54 static NTSTATUS append_info3_as_txt(TALLOC_CTX *mem_ctx,
  55                                     struct winbindd_response *resp,
  56                                     uint16_t validation_level,
  57                                     union netr_Validation *validation)
  58 {
  59         struct netr_SamInfo3 *info3 = NULL;
  60         char *ex = NULL;
  61         uint32_t i;
  62         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
  63         TALLOC_CTX *frame = talloc_stackframe();
  64
  65         status = map_validation_to_info3(frame,
  66                                          validation_level,
  67                                          validation,
  68                                          &info3);
  69         if (!NT_STATUS_IS_OK(status)) {
  70                 goto out;
  71         }
  72
  73         resp->data.auth.info3.logon_time =
  74                 nt_time_to_unix(info3->base.logon_time);
  75         resp->data.auth.info3.logoff_time =
  76                 nt_time_to_unix(info3->base.logoff_time);
  77         resp->data.auth.info3.kickoff_time =
  78                 nt_time_to_unix(info3->base.kickoff_time);
  79         resp->data.auth.info3.pass_last_set_time =
  80                 nt_time_to_unix(info3->base.last_password_change);
  81         resp->data.auth.info3.pass_can_change_time =
  82                 nt_time_to_unix(info3->base.allow_password_change);
  83         resp->data.auth.info3.pass_must_change_time =
  84                 nt_time_to_unix(info3->base.force_password_change);
  85
  86         resp->data.auth.info3.logon_count = info3->base.logon_count;
  87         resp->data.auth.info3.bad_pw_count = info3->base.bad_password_count;
  88
  89         resp->data.auth.info3.user_rid = info3->base.rid;
  90         resp->data.auth.info3.group_rid = info3->base.primary_gid;
  91         sid_to_fstring(resp->data.auth.info3.dom_sid, info3->base.domain_sid);
  92
  93         resp->data.auth.info3.num_groups = info3->base.groups.count;
  94         resp->data.auth.info3.user_flgs = info3->base.user_flags;
  95
  96         resp->data.auth.info3.acct_flags = info3->base.acct_flags;
  97         resp->data.auth.info3.num_other_sids = info3->sidcount;
  98
  99         fstrcpy(resp->data.auth.info3.user_name,
 100                 info3->base.account_name.string);
 101         fstrcpy(resp->data.auth.info3.full_name,
 102                 info3->base.full_name.string);
 103         fstrcpy(resp->data.auth.info3.logon_script,
 104                 info3->base.logon_script.string);
 105         fstrcpy(resp->data.auth.info3.profile_path,
 106                 info3->base.profile_path.string);
 107         fstrcpy(resp->data.auth.info3.home_dir,
 108                 info3->base.home_directory.string);
 109         fstrcpy(resp->data.auth.info3.dir_drive,
 110                 info3->base.home_drive.string);
 111
 112         fstrcpy(resp->data.auth.info3.logon_srv,
 113                 info3->base.logon_server.string);
 114         fstrcpy(resp->data.auth.info3.logon_dom,
 115                 info3->base.logon_domain.string);
 116
 117         resp->data.auth.validation_level = validation_level;
 118         if (validation_level == 6) {
 119                 fstrcpy(resp->data.auth.info6.dns_domainname,
 120                         validation->sam6->dns_domainname.string);
 121                 fstrcpy(resp->data.auth.info6.principal_name,
 122                         validation->sam6->principal_name.string);
 123         }
 124
 125         ex = talloc_strdup(frame, "");
 126         if (ex == NULL) {
 127                 status = NT_STATUS_NO_MEMORY;
 128                 goto out;
 129         }
 130
 131         for (i=0; i < info3->base.groups.count; i++) {
 132                 ex = talloc_asprintf_append_buffer(ex, "0x%08X:0x%08X\n",
 133                                                    info3->base.groups.rids[i].rid,
 134                                                    info3->base.groups.rids[i].attributes);
 135                 if (ex == NULL) {
 136                         status = NT_STATUS_NO_MEMORY;
 137                         goto out;
 138                 }
 139         }
 140
 141         for (i=0; i < info3->sidcount; i++) {
 142                 char *sid;
 143
 144                 sid = dom_sid_string(frame, info3->sids[i].sid);
 145                 if (sid == NULL) {
 146                         status = NT_STATUS_NO_MEMORY;
 147                         goto out;
 148                 }
 149
 150                 ex = talloc_asprintf_append_buffer(ex, "%s:0x%08X\n",
 151                                                    sid,
 152                                                    info3->sids[i].attributes);
 153                 if (ex == NULL) {
 154                         status = NT_STATUS_NO_MEMORY;
 155                         goto out;
 156                 }
 157         }
 158
 159         resp->length += talloc_get_size(ex);
 160         resp->extra_data.data = talloc_move(mem_ctx, &ex);
 161
 162         status = NT_STATUS_OK;
 163 out:
 164         TALLOC_FREE(frame);
 165         return status;
 166 }
 167
 168 static NTSTATUS append_info3_as_ndr(TALLOC_CTX *mem_ctx,
 169                                     struct winbindd_response *resp,
 170                                     struct netr_SamInfo3 *info3)
 171 {
 172         DATA_BLOB blob;
 173         enum ndr_err_code ndr_err;
 174
 175         ndr_err = ndr_push_struct_blob(&blob, mem_ctx, info3,
 176                                        (ndr_push_flags_fn_t)ndr_push_netr_SamInfo3);
 177         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 178                 DEBUG(0,("append_info3_as_ndr: failed to append\n"));
 179                 return ndr_map_error2ntstatus(ndr_err);
 180         }
 181
 182         resp->extra_data.data = blob.data;
 183         resp->length += blob.length;
 184
 185         return NT_STATUS_OK;
 186 }
 187
 188 static NTSTATUS append_unix_username(TALLOC_CTX *mem_ctx,
 189                                      struct winbindd_response *resp,
 190                                      const struct netr_SamInfo3 *info3,
 191                                      const char *name_domain,
 192                                      const char *name_user)
 193 {
 194         /* We've been asked to return the unix username, per
 195            'winbind use default domain' settings and the like */
 196
 197         const char *nt_username, *nt_domain, *unix_username;
 198
 199         nt_domain = talloc_strdup(mem_ctx, info3->base.logon_domain.string);
 200         if (!nt_domain) {
 201                 /* If the server didn't give us one, just use the one
 202                  * we sent them */
 203                 nt_domain = name_domain;
 204         }
 205
 206         nt_username = talloc_strdup(mem_ctx, info3->base.account_name.string);
 207         if (!nt_username) {
 208                 /* If the server didn't give us one, just use the one
 209                  * we sent them */
 210                 nt_username = name_user;
 211         }
 212
 213         unix_username = fill_domain_username_talloc(mem_ctx,
 214                                                     nt_domain,
 215                                                     nt_username,
 216                                                     true);
 217         if (unix_username == NULL) {
 218                 return NT_STATUS_NO_MEMORY;
 219         }
 220
 221         fstrcpy(resp->data.auth.unix_username, unix_username);
 222
 223         DEBUG(5, ("Setting unix username to [%s]\n",
 224                   resp->data.auth.unix_username));
 225
 226         return NT_STATUS_OK;
 227 }
 228
 229 static NTSTATUS append_afs_token(TALLOC_CTX *mem_ctx,
 230                                  struct winbindd_response *resp,
 231                                  const struct netr_SamInfo3 *info3,
 232                                  const char *name_domain,
 233                                  const char *name_user)
 234 {
 235         char *afsname = NULL;
 236         char *cell;
 237         char *token;
 238
 239         afsname = talloc_strdup(mem_ctx, lp_afs_username_map());
 240         if (afsname == NULL) {
 241                 return NT_STATUS_NO_MEMORY;
 242         }
 243
 244         afsname = talloc_string_sub(mem_ctx,
 245                                     lp_afs_username_map(),
 246                                     "%D", name_domain);
 247         afsname = talloc_string_sub(mem_ctx, afsname,
 248                                     "%u", name_user);
 249         afsname = talloc_string_sub(mem_ctx, afsname,
 250                                     "%U", name_user);
 251
 252         {
 253                 struct dom_sid user_sid;
 254                 fstring sidstr;
 255
 256                 sid_compose(&user_sid, info3->base.domain_sid,
 257                             info3->base.rid);
 258                 sid_to_fstring(sidstr, &user_sid);
 259                 afsname = talloc_string_sub(mem_ctx, afsname,
 260                                             "%s", sidstr);
 261         }
 262
 263         if (afsname == NULL) {
 264                 return NT_STATUS_NO_MEMORY;
 265         }
 266
 267         if (!strlower_m(afsname)) {
 268                 return NT_STATUS_INVALID_PARAMETER;
 269         }
 270
 271         DEBUG(10, ("Generating token for user %s\n", afsname));
 272
 273         cell = strchr(afsname, '@');
 274
 275         if (cell == NULL) {
 276                 return NT_STATUS_NO_MEMORY;
 277         }
 278
 279         *cell = '\0';
 280         cell += 1;
 281
 282         token = afs_createtoken_str(afsname, cell);
 283         if (token == NULL) {
 284                 return NT_STATUS_OK;
 285         }
 286         resp->extra_data.data = talloc_strdup(mem_ctx, token);
 287         if (resp->extra_data.data == NULL) {
 288                 return NT_STATUS_NO_MEMORY;
 289         }
 290         resp->length += strlen((const char *)resp->extra_data.data)+1;
 291
 292         return NT_STATUS_OK;
 293 }
 294
 295 static NTSTATUS check_info3_in_group(struct netr_SamInfo3 *info3,
 296                                      const char *group_sid)
 297 /**
 298  * Check whether a user belongs to a group or list of groups.
 299  *
 300  * @param mem_ctx talloc memory context.
 301  * @param info3 user information, including group membership info.
 302  * @param group_sid One or more groups , separated by commas.
 303  *
 304  * @return NT_STATUS_OK on success,
 305  *    NT_STATUS_LOGON_FAILURE if the user does not belong,
 306  *    or other NT_STATUS_IS_ERR(status) for other kinds of failure.
 307  */
 308 {
 309         struct dom_sid *require_membership_of_sid;
 310         uint32_t num_require_membership_of_sid;
 311         char *req_sid;
 312         const char *p;
 313         struct dom_sid sid;
 314         size_t i;
 315         struct security_token *token;
 316         TALLOC_CTX *frame = talloc_stackframe();
 317         NTSTATUS status;
 318
 319         /* Parse the 'required group' SID */
 320
 321         if (!group_sid || !group_sid[0]) {
 322                 /* NO sid supplied, all users may access */
 323                 TALLOC_FREE(frame);
 324                 return NT_STATUS_OK;
 325         }
 326
 327         token = talloc_zero(talloc_tos(), struct security_token);
 328         if (token == NULL) {
 329                 DEBUG(0, ("talloc failed\n"));
 330                 TALLOC_FREE(frame);
 331                 return NT_STATUS_NO_MEMORY;
 332         }
 333
 334         num_require_membership_of_sid = 0;
 335         require_membership_of_sid = NULL;
 336
 337         p = group_sid;
 338
 339         while (next_token_talloc(talloc_tos(), &p, &req_sid, ",")) {
 340                 if (!string_to_sid(&sid, req_sid)) {
 341                         DEBUG(0, ("check_info3_in_group: could not parse %s "
 342                                   "as a SID!", req_sid));
 343                         TALLOC_FREE(frame);
 344                         return NT_STATUS_INVALID_PARAMETER;
 345                 }
 346
 347                 status = add_sid_to_array(talloc_tos(), &sid,
 348                                           &require_membership_of_sid,
 349                                           &num_require_membership_of_sid);
 350                 if (!NT_STATUS_IS_OK(status)) {
 351                         DEBUG(0, ("add_sid_to_array failed\n"));
 352                         TALLOC_FREE(frame);
 353                         return status;
 354                 }
 355         }
 356
 357         status = sid_array_from_info3(talloc_tos(), info3,
 358                                       &token->sids,
 359                                       &token->num_sids,
 360                                       true);
 361         if (!NT_STATUS_IS_OK(status)) {
 362                 TALLOC_FREE(frame);
 363                 return status;
 364         }
 365
 366         if (!NT_STATUS_IS_OK(status = add_aliases(get_global_sam_sid(),
 367                                                   token))
 368             || !NT_STATUS_IS_OK(status = add_aliases(&global_sid_Builtin,
 369                                                      token))) {
 370                 DEBUG(3, ("could not add aliases: %s\n",
 371                           nt_errstr(status)));
 372                 TALLOC_FREE(frame);
 373                 return status;
 374         }
 375
 376         security_token_debug(DBGC_CLASS, 10, token);
 377
 378         for (i=0; i<num_require_membership_of_sid; i++) {
 379                 DEBUG(10, ("Checking SID %s\n", sid_string_dbg(
 380                                    &require_membership_of_sid[i])));
 381                 if (nt_token_check_sid(&require_membership_of_sid[i],
 382                                        token)) {
 383                         DEBUG(10, ("Access ok\n"));
 384                         TALLOC_FREE(frame);
 385                         return NT_STATUS_OK;
 386                 }
 387         }
 388
 389         /* Do not distinguish this error from a wrong username/pw */
 390
 391         TALLOC_FREE(frame);
 392         return NT_STATUS_LOGON_FAILURE;
 393 }
 394
 395 struct winbindd_domain *find_auth_domain(uint8_t flags,
 396                                          const char *domain_name)
 397 {
 398         struct winbindd_domain *domain;
 399
 400         if (IS_DC) {
 401                 domain = find_domain_from_name_noinit(domain_name);
 402                 if (domain == NULL) {
 403                         DEBUG(3, ("Authentication for domain [%s] refused "
 404                                   "as it is not a trusted domain\n",
 405                                   domain_name));
 406                         return NULL;
 407                 }
 408
 409                 if (domain->secure_channel_type != SEC_CHAN_NULL) {
 410                         return domain;
 411                 }
 412
 413                 return domain->routing_domain;
 414         }
 415
 416         if (strequal(domain_name, get_global_sam_name())) {
 417                 return find_domain_from_name_noinit(domain_name);
 418         }
 419
 420         /* we can auth against trusted domains */
 421         if (flags & WBFLAG_PAM_CONTACT_TRUSTDOM) {
 422                 domain = find_domain_from_name_noinit(domain_name);
 423                 if (domain == NULL) {
 424                         DEBUG(3, ("Authentication for domain [%s] skipped "
 425                                   "as it is not a trusted domain\n",
 426                                   domain_name));
 427                 } else {
 428                         return domain;
 429                 }
 430         }
 431
 432         return find_our_domain();
 433 }
 434
 435 static void fake_password_policy(struct winbindd_response *r,
 436                                  const struct netr_SamBaseInfo *bi)
 437 {
 438         NTTIME min_password_age;
 439         NTTIME max_password_age;
 440
 441         if (bi->allow_password_change > bi->last_password_change) {
 442                 min_password_age = bi->allow_password_change -
 443                                    bi->last_password_change;
 444         } else {
 445                 min_password_age = 0;
 446         }
 447
 448         if (bi->force_password_change > bi->last_password_change) {
 449                 max_password_age = bi->force_password_change -
 450                                    bi->last_password_change;
 451         } else {
 452                 max_password_age = 0;
 453         }
 454
 455         r->data.auth.policy.min_length_password = 0;
 456         r->data.auth.policy.password_history = 0;
 457         r->data.auth.policy.password_properties = 0;
 458         r->data.auth.policy.expire =
 459                 nt_time_to_unix_abs(&max_password_age);
 460         r->data.auth.policy.min_passwordage =
 461                 nt_time_to_unix_abs(&min_password_age);
 462 }
 463
 464 static void fill_in_password_policy(struct winbindd_response *r,
 465                                     const struct samr_DomInfo1 *p)
 466 {
 467         r->data.auth.policy.min_length_password =
 468                 p->min_password_length;
 469         r->data.auth.policy.password_history =
 470                 p->password_history_length;
 471         r->data.auth.policy.password_properties =
 472                 p->password_properties;
 473         r->data.auth.policy.expire      =
 474                 nt_time_to_unix_abs((const NTTIME *)&(p->max_password_age));
 475         r->data.auth.policy.min_passwordage =
 476                 nt_time_to_unix_abs((const NTTIME *)&(p->min_password_age));
 477 }
 478
 479 static NTSTATUS fillup_password_policy(struct winbindd_domain *domain,
 480                                        struct winbindd_response *response)
 481 {
 482         TALLOC_CTX *frame = talloc_stackframe();
 483         NTSTATUS status;
 484         struct samr_DomInfo1 password_policy;
 485
 486         if ( !winbindd_can_contact_domain( domain ) ) {
 487                 DEBUG(5,("fillup_password_policy: No inbound trust to "
 488                          "contact domain %s\n", domain->name));
 489                 status = NT_STATUS_NOT_SUPPORTED;
 490                 goto done;
 491         }
 492
 493         status = wb_cache_password_policy(domain, talloc_tos(),
 494                                           &password_policy);
 495         if (NT_STATUS_IS_ERR(status)) {
 496                 goto done;
 497         }
 498
 499         fill_in_password_policy(response, &password_policy);
 500
 501 done:
 502         TALLOC_FREE(frame);
 503         return NT_STATUS_OK;
 504 }
 505
 506 static NTSTATUS get_max_bad_attempts_from_lockout_policy(struct winbindd_domain *domain,
 507                                                          TALLOC_CTX *mem_ctx,
 508                                                          uint16_t *lockout_threshold)
 509 {
 510         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 511         struct samr_DomInfo12 lockout_policy;
 512
 513         *lockout_threshold = 0;
 514
 515         status = wb_cache_lockout_policy(domain, mem_ctx, &lockout_policy);
 516         if (NT_STATUS_IS_ERR(status)) {
 517                 return status;
 518         }
 519
 520         *lockout_threshold = lockout_policy.lockout_threshold;
 521
 522         return NT_STATUS_OK;
 523 }
 524
 525 static NTSTATUS get_pwd_properties(struct winbindd_domain *domain,
 526                                    TALLOC_CTX *mem_ctx,
 527                                    uint32_t *password_properties)
 528 {
 529         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 530         struct samr_DomInfo1 password_policy;
 531
 532         *password_properties = 0;
 533
 534         status = wb_cache_password_policy(domain, mem_ctx, &password_policy);
 535         if (NT_STATUS_IS_ERR(status)) {
 536                 return status;
 537         }
 538
 539         *password_properties = password_policy.password_properties;
 540
 541         return NT_STATUS_OK;
 542 }
 543
 544 #ifdef HAVE_KRB5
 545
 546 static const char *generate_krb5_ccache(TALLOC_CTX *mem_ctx,
 547                                         const char *type,
 548                                         uid_t uid,
 549                                         const char **user_ccache_file)
 550 {
 551         /* accept FILE and WRFILE as krb5_cc_type from the client and then
 552          * build the full ccname string based on the user's uid here -
 553          * Guenther*/
 554
 555         const char *gen_cc = NULL;
 556
 557         if (uid != -1) {
 558                 if (strequal(type, "FILE")) {
 559                         gen_cc = talloc_asprintf(
 560                                 mem_ctx, "FILE:/tmp/krb5cc_%d", uid);
 561                 }
 562                 if (strequal(type, "WRFILE")) {
 563                         gen_cc = talloc_asprintf(
 564                                 mem_ctx, "WRFILE:/tmp/krb5cc_%d", uid);
 565                 }
 566                 if (strequal(type, "KEYRING")) {
 567                         gen_cc = talloc_asprintf(
 568                                 mem_ctx, "KEYRING:persistent:%d", uid);
 569                 }
 570
 571                 if (strnequal(type, "FILE:/", 6) ||
 572                     strnequal(type, "WRFILE:/", 8) ||
 573                     strnequal(type, "DIR:/", 5)) {
 574
 575                         /* we allow only one "%u" substitution */
 576
 577                         char *p;
 578
 579                         p = strchr(type, '%');
 580                         if (p != NULL) {
 581
 582                                 p++;
 583
 584                                 if (p != NULL && *p == 'u' && strchr(p, '%') == NULL) {
 585                                         char uid_str[sizeof("18446744073709551615")];
 586
 587                                         snprintf(uid_str, sizeof(uid_str), "%u", uid);
 588
 589                                         gen_cc = talloc_string_sub2(mem_ctx,
 590                                                         type,
 591                                                         "%u",
 592                                                         uid_str,
 593                                                         /* remove_unsafe_characters */
 594                                                         false,
 595                                                         /* replace_once */
 596                                                         true,
 597                                                         /* allow_trailing_dollar */
 598                                                         false);
 599                                 }
 600                         }
 601                 }
 602         }
 603
 604         *user_ccache_file = gen_cc;
 605
 606         if (gen_cc == NULL) {
 607                 gen_cc = talloc_strdup(mem_ctx, "MEMORY:winbindd_pam_ccache");
 608         }
 609         if (gen_cc == NULL) {
 610                 DEBUG(0,("out of memory\n"));
 611                 return NULL;
 612         }
 613
 614         DEBUG(10, ("using ccache: %s%s\n", gen_cc,
 615                    (*user_ccache_file == NULL) ? " (internal)":""));
 616
 617         return gen_cc;
 618 }
 619
 620 #endif
 621
 622 uid_t get_uid_from_request(struct winbindd_request *request)
 623 {
 624         uid_t uid;
 625
 626         uid = request->data.auth.uid;
 627
 628         if (uid == (uid_t)-1) {
 629                 DEBUG(1,("invalid uid: '%u'\n", (unsigned int)uid));
 630                 return -1;
 631         }
 632         return uid;
 633 }
 634
 635 /**********************************************************************
 636  Authenticate a user with a clear text password using Kerberos and fill up
 637  ccache if required
 638  **********************************************************************/
 639
 640 static NTSTATUS winbindd_raw_kerberos_login(TALLOC_CTX *mem_ctx,
 641                                             struct winbindd_domain *domain,
 642                                             const char *user,
 643                                             const char *pass,
 644                                             const char *krb5_cc_type,
 645                                             uid_t uid,
 646                                             struct netr_SamInfo6 **info6,
 647                                             fstring krb5ccname)
 648 {
 649 #ifdef HAVE_KRB5
 650         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
 651         krb5_error_code krb5_ret;
 652         const char *cc = NULL;
 653         const char *principal_s = NULL;
 654         const char *service = NULL;
 655         char *realm = NULL;
 656         fstring name_namespace, name_domain, name_user;
 657         time_t ticket_lifetime = 0;
 658         time_t renewal_until = 0;
 659         ADS_STRUCT *ads;
 660         time_t time_offset = 0;
 661         const char *user_ccache_file;
 662         struct PAC_LOGON_INFO *logon_info = NULL;
 663         struct PAC_UPN_DNS_INFO *upn_dns_info = NULL;
 664         struct PAC_DATA *pac_data = NULL;
 665         struct PAC_DATA_CTR *pac_data_ctr = NULL;
 666         const char *local_service;
 667         uint32_t i;
 668         struct netr_SamInfo6 *info6_copy = NULL;
 669         bool ok;
 670
 671         *info6 = NULL;
 672
 673         if (domain->alt_name == NULL) {
 674                 return NT_STATUS_INVALID_PARAMETER;
 675         }
 676
 677         /* 1st step:
 678          * prepare a krb5_cc_cache string for the user */
 679
 680         if (uid == -1) {
 681                 DEBUG(0,("no valid uid\n"));
 682         }
 683
 684         cc = generate_krb5_ccache(mem_ctx,
 685                                   krb5_cc_type,
 686                                   uid,
 687                                   &user_ccache_file);
 688         if (cc == NULL) {
 689                 return NT_STATUS_NO_MEMORY;
 690         }
 691
 692
 693         /* 2nd step:
 694          * get kerberos properties */
 695
 696         if (domain->private_data) {
 697                 ads = (ADS_STRUCT *)domain->private_data;
 698                 time_offset = ads->auth.time_offset;
 699         }
 700
 701
 702         /* 3rd step:
 703          * do kerberos auth and setup ccache as the user */
 704
 705         ok = parse_domain_user(user, name_namespace, name_domain, name_user);
 706         if (!ok) {
 707                 return NT_STATUS_INVALID_PARAMETER;
 708         }
 709
 710         realm = talloc_strdup(mem_ctx, domain->alt_name);
 711         if (realm == NULL) {
 712                 return NT_STATUS_NO_MEMORY;
 713         }
 714
 715         if (!strupper_m(realm)) {
 716                 return NT_STATUS_INVALID_PARAMETER;
 717         }
 718
 719         principal_s = talloc_asprintf(mem_ctx, "%s@%s", name_user, realm);
 720         if (principal_s == NULL) {
 721                 return NT_STATUS_NO_MEMORY;
 722         }
 723
 724         service = talloc_asprintf(mem_ctx, "%s/%s@%s", KRB5_TGS_NAME, realm, realm);
 725         if (service == NULL) {
 726                 return NT_STATUS_NO_MEMORY;
 727         }
 728
 729         local_service = talloc_asprintf(mem_ctx, "%s$@%s",
 730                                         lp_netbios_name(), lp_realm());
 731         if (local_service == NULL) {
 732                 return NT_STATUS_NO_MEMORY;
 733         }
 734
 735
 736         /* if this is a user ccache, we need to act as the user to let the krb5
 737          * library handle the chown, etc. */
 738
 739         /************************ ENTERING NON-ROOT **********************/
 740
 741         if (user_ccache_file != NULL) {
 742                 set_effective_uid(uid);
 743                 DEBUG(10,("winbindd_raw_kerberos_login: uid is %d\n", uid));
 744         }
 745
 746         result = kerberos_return_pac(mem_ctx,
 747                                      principal_s,
 748                                      pass,
 749                                      time_offset,
 750                                      &ticket_lifetime,
 751                                      &renewal_until,
 752                                      cc,
 753                                      true,
 754                                      true,
 755                                      WINBINDD_PAM_AUTH_KRB5_RENEW_TIME,
 756                                      NULL,
 757                                      local_service,
 758                                      &pac_data_ctr);
 759         if (user_ccache_file != NULL) {
 760                 gain_root_privilege();
 761         }
 762
 763         /************************ RETURNED TO ROOT **********************/
 764
 765         if (!NT_STATUS_IS_OK(result)) {
 766                 goto failed;
 767         }
 768
 769         if (pac_data_ctr == NULL) {
 770                 goto failed;
 771         }
 772
 773         pac_data = pac_data_ctr->pac_data;
 774         if (pac_data == NULL) {
 775                 goto failed;
 776         }
 777
 778         for (i=0; i < pac_data->num_buffers; i++) {
 779
 780                 if (pac_data->buffers[i].type == PAC_TYPE_LOGON_INFO) {
 781                         logon_info = pac_data->buffers[i].info->logon_info.info;
 782                         continue;
 783                 }
 784
 785                 if (pac_data->buffers[i].type == PAC_TYPE_UPN_DNS_INFO) {
 786                         upn_dns_info = &pac_data->buffers[i].info->upn_dns_info;
 787                         continue;
 788                 }
 789         }
 790
 791         if (logon_info == NULL) {
 792                 DEBUG(10,("Missing logon_info in ticket of %s\n",
 793                         principal_s));
 794                 return NT_STATUS_INVALID_PARAMETER;
 795         }
 796
 797         DEBUG(10,("winbindd_raw_kerberos_login: winbindd validated ticket of %s\n",
 798                 principal_s));
 799
 800         result = create_info6_from_pac(mem_ctx, logon_info,
 801                                        upn_dns_info, &info6_copy);
 802         if (!NT_STATUS_IS_OK(result)) {
 803                 goto failed;
 804         }
 805
 806         /* if we had a user's ccache then return that string for the pam
 807          * environment */
 808
 809         if (user_ccache_file != NULL) {
 810
 811                 fstrcpy(krb5ccname, user_ccache_file);
 812
 813                 result = add_ccache_to_list(principal_s,
 814                                             cc,
 815                                             service,
 816                                             user,
 817                                             pass,
 818                                             realm,
 819                                             uid,
 820                                             time(NULL),
 821                                             ticket_lifetime,
 822                                             renewal_until,
 823                                             false);
 824
 825                 if (!NT_STATUS_IS_OK(result)) {
 826                         DEBUG(10,("winbindd_raw_kerberos_login: failed to add ccache to list: %s\n",
 827                                 nt_errstr(result)));
 828                 }
 829         } else {
 830
 831                 /* need to delete the memory cred cache, it is not used anymore */
 832
 833                 krb5_ret = ads_kdestroy(cc);
 834                 if (krb5_ret) {
 835                         DEBUG(3,("winbindd_raw_kerberos_login: "
 836                                  "could not destroy krb5 credential cache: "
 837                                  "%s\n", error_message(krb5_ret)));
 838                 }
 839
 840         }
 841         *info6 = info6_copy;
 842         return NT_STATUS_OK;
 843
 844 failed:
 845         /*
 846          * Do not delete an existing valid credential cache, if the user
 847          * e.g. enters a wrong password
 848          */
 849         if ((strequal(krb5_cc_type, "FILE") || strequal(krb5_cc_type, "WRFILE"))
 850             && user_ccache_file != NULL) {
 851                 return result;
 852         }
 853
 854         /* we could have created a new credential cache with a valid tgt in it
 855          * but we werent able to get or verify the service ticket for this
 856          * local host and therefor didn't get the PAC, we need to remove that
 857          * cache entirely now */
 858
 859         krb5_ret = ads_kdestroy(cc);
 860         if (krb5_ret) {
 861                 DEBUG(3,("winbindd_raw_kerberos_login: "
 862                          "could not destroy krb5 credential cache: "
 863                          "%s\n", error_message(krb5_ret)));
 864         }
 865
 866         if (!NT_STATUS_IS_OK(remove_ccache(user))) {
 867                 DEBUG(3,("winbindd_raw_kerberos_login: "
 868                           "could not remove ccache for user %s\n",
 869                         user));
 870         }
 871
 872         return result;
 873 #else
 874         return NT_STATUS_NOT_SUPPORTED;
 875 #endif /* HAVE_KRB5 */
 876 }
 877
 878 /****************************************************************
 879 ****************************************************************/
 880
 881 bool check_request_flags(uint32_t flags)
 882 {
 883         uint32_t flags_edata = WBFLAG_PAM_AFS_TOKEN |
 884                                WBFLAG_PAM_INFO3_TEXT |
 885                                WBFLAG_PAM_INFO3_NDR;
 886
 887         if ( ( (flags & flags_edata) == WBFLAG_PAM_AFS_TOKEN) ||
 888              ( (flags & flags_edata) == WBFLAG_PAM_INFO3_NDR) ||
 889              ( (flags & flags_edata) == WBFLAG_PAM_INFO3_TEXT)||
 890               !(flags & flags_edata) ) {
 891                 return true;
 892         }
 893
 894         DEBUG(1, ("check_request_flags: invalid request flags[0x%08X]\n",
 895                   flags));
 896
 897         return false;
 898 }
 899
 900 /****************************************************************
 901 ****************************************************************/
 902
 903 NTSTATUS append_auth_data(TALLOC_CTX *mem_ctx,
 904                           struct winbindd_response *resp,
 905                           uint32_t request_flags,
 906                           uint16_t validation_level,
 907                           union netr_Validation *validation,
 908                           const char *name_domain,
 909                           const char *name_user)
 910 {
 911         struct netr_SamInfo3 *info3 = NULL;
 912         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
 913
 914         result = map_validation_to_info3(talloc_tos(),
 915                                          validation_level,
 916                                          validation,
 917                                          &info3);
 918         if (!NT_STATUS_IS_OK(result)) {
 919                 goto out;
 920         }
 921
 922         if (request_flags & WBFLAG_PAM_USER_SESSION_KEY) {
 923                 memcpy(resp->data.auth.user_session_key,
 924                        info3->base.key.key,
 925                        sizeof(resp->data.auth.user_session_key)
 926                        /* 16 */);
 927         }
 928
 929         if (request_flags & WBFLAG_PAM_LMKEY) {
 930                 memcpy(resp->data.auth.first_8_lm_hash,
 931                        info3->base.LMSessKey.key,
 932                        sizeof(resp->data.auth.first_8_lm_hash)
 933                        /* 8 */);
 934         }
 935
 936         if (request_flags & WBFLAG_PAM_UNIX_NAME) {
 937                 result = append_unix_username(mem_ctx, resp,
 938                                               info3, name_domain, name_user);
 939                 if (!NT_STATUS_IS_OK(result)) {
 940                         DEBUG(10,("Failed to append Unix Username: %s\n",
 941                                 nt_errstr(result)));
 942                         goto out;
 943                 }
 944         }
 945
 946         /* currently, anything from here on potentially overwrites extra_data. */
 947
 948         if (request_flags & WBFLAG_PAM_INFO3_NDR) {
 949                 result = append_info3_as_ndr(mem_ctx, resp, info3);
 950                 if (!NT_STATUS_IS_OK(result)) {
 951                         DEBUG(10,("Failed to append INFO3 (NDR): %s\n",
 952                                 nt_errstr(result)));
 953                         goto out;
 954                 }
 955         }
 956
 957         if (request_flags & WBFLAG_PAM_INFO3_TEXT) {
 958                 result = append_info3_as_txt(mem_ctx, resp,
 959                                              validation_level,
 960                                              validation);
 961                 if (!NT_STATUS_IS_OK(result)) {
 962                         DEBUG(10,("Failed to append INFO3 (TXT): %s\n",
 963                                 nt_errstr(result)));
 964                         goto out;
 965                 }
 966         }
 967
 968         if (request_flags & WBFLAG_PAM_AFS_TOKEN) {
 969                 result = append_afs_token(mem_ctx, resp,
 970                                           info3, name_domain, name_user);
 971                 if (!NT_STATUS_IS_OK(result)) {
 972                         DEBUG(10,("Failed to append AFS token: %s\n",
 973                                 nt_errstr(result)));
 974                         goto out;
 975                 }
 976         }
 977
 978         result = NT_STATUS_OK;
 979 out:
 980         TALLOC_FREE(info3);
 981         return result;
 982 }
 983
 984 static NTSTATUS winbindd_dual_pam_auth_cached(struct winbindd_domain *domain,
 985                                               struct winbindd_cli_state *state,
 986                                               struct netr_SamInfo3 **info3)
 987 {
 988         NTSTATUS result = NT_STATUS_LOGON_FAILURE;
 989         uint16_t max_allowed_bad_attempts;
 990         fstring name_namespace, name_domain, name_user;
 991         struct dom_sid sid;
 992         enum lsa_SidType type;
 993         uchar new_nt_pass[NT_HASH_LEN];
 994         const uint8_t *cached_nt_pass;
 995         const uint8_t *cached_salt;
 996         struct netr_SamInfo3 *my_info3;
 997         time_t kickoff_time, must_change_time;
 998         bool password_good = false;
 999         bool ok;
1000 #ifdef HAVE_KRB5
1001         struct winbindd_tdc_domain *tdc_domain = NULL;
1002 #endif
1003
1004         *info3 = NULL;
1005
1006         ZERO_STRUCTP(info3);
1007
1008         DEBUG(10,("winbindd_dual_pam_auth_cached\n"));
1009
1010         /* Parse domain and username */
1011
1012         ok = parse_domain_user(state->request->data.auth.user,
1013                                name_namespace,
1014                                name_domain,
1015                                name_user);
1016         if (!ok) {
1017                 DBG_DEBUG("parse_domain_user failed\n");
1018                 return NT_STATUS_NO_SUCH_USER;
1019         }
1020
1021         if (!lookup_cached_name(name_namespace,
1022                                 name_domain,
1023                                 name_user,
1024                                 &sid,
1025                                 &type)) {
1026                 DEBUG(10,("winbindd_dual_pam_auth_cached: no such user in the cache\n"));
1027                 return NT_STATUS_NO_SUCH_USER;
1028         }
1029
1030         if (type != SID_NAME_USER) {
1031                 DEBUG(10,("winbindd_dual_pam_auth_cached: not a user (%s)\n", sid_type_lookup(type)));
1032                 return NT_STATUS_LOGON_FAILURE;
1033         }
1034
1035         result = winbindd_get_creds(domain,
1036                                     state->mem_ctx,
1037                                     &sid,
1038                                     &my_info3,
1039                                     &cached_nt_pass,
1040                                     &cached_salt);
1041         if (!NT_STATUS_IS_OK(result)) {
1042                 DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get creds: %s\n", nt_errstr(result)));
1043                 return result;
1044         }
1045
1046         *info3 = my_info3;
1047
1048         E_md4hash(state->request->data.auth.pass, new_nt_pass);
1049
1050         dump_data_pw("new_nt_pass", new_nt_pass, NT_HASH_LEN);
1051         dump_data_pw("cached_nt_pass", cached_nt_pass, NT_HASH_LEN);
1052         if (cached_salt) {
1053                 dump_data_pw("cached_salt", cached_salt, NT_HASH_LEN);
1054         }
1055
1056         if (cached_salt) {
1057                 /* In this case we didn't store the nt_hash itself,
1058                    but the MD5 combination of salt + nt_hash. */
1059                 uchar salted_hash[NT_HASH_LEN];
1060                 E_md5hash(cached_salt, new_nt_pass, salted_hash);
1061
1062                 password_good = (memcmp(cached_nt_pass, salted_hash,
1063                                         NT_HASH_LEN) == 0);
1064         } else {
1065                 /* Old cached cred - direct store of nt_hash (bad bad bad !). */
1066                 password_good = (memcmp(cached_nt_pass, new_nt_pass,
1067                                         NT_HASH_LEN) == 0);
1068         }
1069
1070         if (password_good) {
1071
1072                 /* User *DOES* know the password, update logon_time and reset
1073                  * bad_pw_count */
1074
1075                 my_info3->base.user_flags |= NETLOGON_CACHED_ACCOUNT;
1076
1077                 if (my_info3->base.acct_flags & ACB_AUTOLOCK) {
1078                         return NT_STATUS_ACCOUNT_LOCKED_OUT;
1079                 }
1080
1081                 if (my_info3->base.acct_flags & ACB_DISABLED) {
1082                         return NT_STATUS_ACCOUNT_DISABLED;
1083                 }
1084
1085                 if (my_info3->base.acct_flags & ACB_WSTRUST) {
1086                         return NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT;
1087                 }
1088
1089                 if (my_info3->base.acct_flags & ACB_SVRTRUST) {
1090                         return NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT;
1091                 }
1092
1093                 if (my_info3->base.acct_flags & ACB_DOMTRUST) {
1094                         return NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT;
1095                 }
1096
1097                 if (!(my_info3->base.acct_flags & ACB_NORMAL)) {
1098                         DEBUG(0,("winbindd_dual_pam_auth_cached: whats wrong with that one?: 0x%08x\n",
1099                                 my_info3->base.acct_flags));
1100                         return NT_STATUS_LOGON_FAILURE;
1101                 }
1102
1103                 kickoff_time = nt_time_to_unix(my_info3->base.kickoff_time);
1104                 if (kickoff_time != 0 && time(NULL) > kickoff_time) {
1105                         return NT_STATUS_ACCOUNT_EXPIRED;
1106                 }
1107
1108                 must_change_time = nt_time_to_unix(my_info3->base.force_password_change);
1109                 if (must_change_time != 0 && must_change_time < time(NULL)) {
1110                         /* we allow grace logons when the password has expired */
1111                         my_info3->base.user_flags |= NETLOGON_GRACE_LOGON;
1112                         /* return NT_STATUS_PASSWORD_EXPIRED; */
1113                         goto success;
1114                 }
1115
1116 #ifdef HAVE_KRB5
1117                 if ((state->request->flags & WBFLAG_PAM_KRB5) &&
1118                     ((tdc_domain = wcache_tdc_fetch_domain(state->mem_ctx, name_domain)) != NULL) &&
1119                     ((tdc_domain->trust_type & LSA_TRUST_TYPE_UPLEVEL) ||
1120                     /* used to cope with the case winbindd starting without network. */
1121                     !strequal(tdc_domain->domain_name, tdc_domain->dns_name))) {
1122
1123                         uid_t uid = -1;
1124                         const char *cc = NULL;
1125                         char *realm = NULL;
1126                         const char *principal_s = NULL;
1127                         const char *service = NULL;
1128                         const char *user_ccache_file;
1129
1130                         if (domain->alt_name == NULL) {
1131                                 return NT_STATUS_INVALID_PARAMETER;
1132                         }
1133
1134                         uid = get_uid_from_request(state->request);
1135                         if (uid == -1) {
1136                                 DEBUG(0,("winbindd_dual_pam_auth_cached: invalid uid\n"));
1137                                 return NT_STATUS_INVALID_PARAMETER;
1138                         }
1139
1140                         cc = generate_krb5_ccache(state->mem_ctx,
1141                                                 state->request->data.auth.krb5_cc_type,
1142                                                 state->request->data.auth.uid,
1143                                                 &user_ccache_file);
1144                         if (cc == NULL) {
1145                                 return NT_STATUS_NO_MEMORY;
1146                         }
1147
1148                         realm = talloc_strdup(state->mem_ctx, domain->alt_name);
1149                         if (realm == NULL) {
1150                                 return NT_STATUS_NO_MEMORY;
1151                         }
1152
1153                         if (!strupper_m(realm)) {
1154                                 return NT_STATUS_INVALID_PARAMETER;
1155                         }
1156
1157                         principal_s = talloc_asprintf(state->mem_ctx, "%s@%s", name_user, realm);
1158                         if (principal_s == NULL) {
1159                                 return NT_STATUS_NO_MEMORY;
1160                         }
1161
1162                         service = talloc_asprintf(state->mem_ctx, "%s/%s@%s", KRB5_TGS_NAME, realm, realm);
1163                         if (service == NULL) {
1164                                 return NT_STATUS_NO_MEMORY;
1165                         }
1166
1167                         if (user_ccache_file != NULL) {
1168
1169                                 fstrcpy(state->response->data.auth.krb5ccname,
1170                                         user_ccache_file);
1171
1172                                 result = add_ccache_to_list(principal_s,
1173                                                             cc,
1174                                                             service,
1175                                                             state->request->data.auth.user,
1176                                                             state->request->data.auth.pass,
1177                                                             realm,
1178                                                             uid,
1179                                                             time(NULL),
1180                                                             time(NULL) + lp_winbind_cache_time(),
1181                                                             time(NULL) + WINBINDD_PAM_AUTH_KRB5_RENEW_TIME,
1182                                                             true);
1183
1184                                 if (!NT_STATUS_IS_OK(result)) {
1185                                         DEBUG(10,("winbindd_dual_pam_auth_cached: failed "
1186                                                 "to add ccache to list: %s\n",
1187                                                 nt_errstr(result)));
1188                                 }
1189                         }
1190                 }
1191 #endif /* HAVE_KRB5 */
1192  success:
1193                 /* FIXME: we possibly should handle logon hours as well (does xp when
1194                  * offline?) see auth/auth_sam.c:sam_account_ok for details */
1195
1196                 unix_to_nt_time(&my_info3->base.logon_time, time(NULL));
1197                 my_info3->base.bad_password_count = 0;
1198
1199                 result = winbindd_update_creds_by_info3(domain,
1200                                                         state->request->data.auth.user,
1201                                                         state->request->data.auth.pass,
1202                                                         my_info3);
1203                 if (!NT_STATUS_IS_OK(result)) {
1204                         DEBUG(1,("winbindd_dual_pam_auth_cached: failed to update creds: %s\n",
1205                                 nt_errstr(result)));
1206                         return result;
1207                 }
1208
1209                 return NT_STATUS_OK;
1210
1211         }
1212
1213         /* User does *NOT* know the correct password, modify info3 accordingly, but only if online */
1214         if (domain->online == false) {
1215                 goto failed;
1216         }
1217
1218         /* failure of this is not critical */
1219         result = get_max_bad_attempts_from_lockout_policy(domain, state->mem_ctx, &max_allowed_bad_attempts);
1220         if (!NT_STATUS_IS_OK(result)) {
1221                 DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get max_allowed_bad_attempts. "
1222                           "Won't be able to honour account lockout policies\n"));
1223         }
1224
1225         /* increase counter */
1226         my_info3->base.bad_password_count++;
1227
1228         if (max_allowed_bad_attempts == 0) {
1229                 goto failed;
1230         }
1231
1232         /* lockout user */
1233         if (my_info3->base.bad_password_count >= max_allowed_bad_attempts) {
1234
1235                 uint32_t password_properties;
1236
1237                 result = get_pwd_properties(domain, state->mem_ctx, &password_properties);
1238                 if (!NT_STATUS_IS_OK(result)) {
1239                         DEBUG(10,("winbindd_dual_pam_auth_cached: failed to get password properties.\n"));
1240                 }
1241
1242                 if ((my_info3->base.rid != DOMAIN_RID_ADMINISTRATOR) ||
1243                     (password_properties & DOMAIN_PASSWORD_LOCKOUT_ADMINS)) {
1244                         my_info3->base.acct_flags |= ACB_AUTOLOCK;
1245                 }
1246         }
1247
1248 failed:
1249         result = winbindd_update_creds_by_info3(domain,
1250                                                 state->request->data.auth.user,
1251                                                 NULL,
1252                                                 my_info3);
1253
1254         if (!NT_STATUS_IS_OK(result)) {
1255                 DEBUG(0,("winbindd_dual_pam_auth_cached: failed to update creds %s\n",
1256                         nt_errstr(result)));
1257         }
1258
1259         return NT_STATUS_LOGON_FAILURE;
1260 }
1261
1262 static NTSTATUS winbindd_dual_pam_auth_kerberos(struct winbindd_domain *domain,
1263                                                 struct winbindd_cli_state *state,
1264                                                 struct netr_SamInfo6 **info6)
1265 {
1266         struct winbindd_domain *contact_domain;
1267         fstring name_namespace, name_domain, name_user;
1268         NTSTATUS result;
1269         bool ok;
1270
1271         DEBUG(10,("winbindd_dual_pam_auth_kerberos\n"));
1272
1273         /* Parse domain and username */
1274
1275         ok = parse_domain_user(state->request->data.auth.user,
1276                                name_namespace,
1277                                name_domain,
1278                                name_user);
1279         if (!ok) {
1280                 result = NT_STATUS_INVALID_PARAMETER;
1281                 goto done;
1282         }
1283
1284         /* what domain should we contact? */
1285
1286         if ( IS_DC ) {
1287                 contact_domain = find_domain_from_name(name_namespace);
1288                 if (contact_domain == NULL) {
1289                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
1290                                   state->request->data.auth.user, name_domain, name_user, name_domain));
1291                         result = NT_STATUS_NO_SUCH_USER;
1292                         goto done;
1293                 }
1294
1295         } else {
1296                 if (is_myname(name_domain)) {
1297                         DEBUG(3, ("Authentication for domain %s (local domain to this server) not supported at this stage\n", name_domain));
1298                         result =  NT_STATUS_NO_SUCH_USER;
1299                         goto done;
1300                 }
1301
1302                 contact_domain = find_domain_from_name(name_namespace);
1303                 if (contact_domain == NULL) {
1304                         DEBUG(3, ("Authentication for domain for [%s] -> [%s]\\[%s] failed as %s is not a trusted domain\n",
1305                                   state->request->data.auth.user, name_domain, name_user, name_domain));
1306
1307                         result =  NT_STATUS_NO_SUCH_USER;
1308                         goto done;
1309                 }
1310         }
1311
1312         if (contact_domain->initialized &&
1313             contact_domain->active_directory) {
1314                 goto try_login;
1315         }
1316
1317         if (!contact_domain->initialized) {
1318                 init_dc_connection(contact_domain, false);
1319         }
1320
1321         if (!contact_domain->active_directory) {
1322                 DEBUG(3,("krb5 auth requested but domain is not Active Directory\n"));
1323                 return NT_STATUS_INVALID_LOGON_TYPE;
1324         }
1325 try_login:
1326         result = winbindd_raw_kerberos_login(
1327                 state->mem_ctx, contact_domain,
1328                 state->request->data.auth.user,
1329                 state->request->data.auth.pass,
1330                 state->request->data.auth.krb5_cc_type,
1331                 get_uid_from_request(state->request),
1332                 info6, state->response->data.auth.krb5ccname);
1333 done:
1334         return result;
1335 }
1336
1337 static NTSTATUS winbindd_dual_auth_passdb(TALLOC_CTX *mem_ctx,
1338                                           uint32_t logon_parameters,
1339                                           const char *domain, const char *user,
1340                                           const DATA_BLOB *challenge,
1341                                           const DATA_BLOB *lm_resp,
1342                                           const DATA_BLOB *nt_resp,
1343                                           bool interactive,
1344                                           uint8_t *pauthoritative,
1345                                           struct netr_SamInfo3 **pinfo3)
1346 {
1347         struct auth_context *auth_context;
1348         struct auth_serversupplied_info *server_info;
1349         struct auth_usersupplied_info *user_info = NULL;
1350         struct tsocket_address *local;
1351         struct netr_SamInfo3 *info3;
1352         NTSTATUS status;
1353         bool ok;
1354         int rc;
1355         TALLOC_CTX *frame = talloc_stackframe();
1356
1357         /*
1358          * We are authoritative by default
1359          */
1360         *pauthoritative = 1;
1361
1362         rc = tsocket_address_inet_from_strings(frame,
1363                                                "ip",
1364                                                "127.0.0.1",
1365                                                0,
1366                                                &local);
1367         if (rc < 0) {
1368                 TALLOC_FREE(frame);
1369                 return NT_STATUS_NO_MEMORY;
1370         }
1371
1372         /*
1373          * TODO: We should get the service description passed in from
1374          * the winbind client, so we can have "smb2", "squid" or "samr" logged
1375          * here.
1376          */
1377         status = make_user_info(frame, &user_info, user, user, domain, domain,
1378                                 lp_netbios_name(), local, local,
1379                                 "winbind",
1380                                 lm_resp, nt_resp, NULL, NULL,
1381                                 NULL, AUTH_PASSWORD_RESPONSE);
1382         if (!NT_STATUS_IS_OK(status)) {
1383                 DEBUG(10, ("make_user_info failed: %s\n", nt_errstr(status)));
1384                 TALLOC_FREE(frame);
1385                 return status;
1386         }
1387
1388         user_info->logon_parameters = logon_parameters;
1389
1390         /* We don't want any more mapping of the username */
1391         user_info->mapped_state = True;
1392
1393         /* We don't want to come back to winbindd or to do PAM account checks */
1394         user_info->flags |= USER_INFO_INFO3_AND_NO_AUTHZ;
1395
1396         if (interactive) {
1397                 user_info->flags |= USER_INFO_INTERACTIVE_LOGON;
1398         }
1399
1400         status = make_auth3_context_for_winbind(frame, &auth_context);
1401         if (!NT_STATUS_IS_OK(status)) {
1402                 DBG_ERR("make_auth3_context_for_winbind failed: %s\n",
1403                         nt_errstr(status));
1404                 TALLOC_FREE(frame);
1405                 return status;
1406         }
1407
1408         ok = auth3_context_set_challenge(auth_context,
1409                                          challenge->data, "fixed");
1410         if (!ok) {
1411                 TALLOC_FREE(frame);
1412                 return NT_STATUS_NO_MEMORY;
1413         }
1414
1415         status = auth_check_ntlm_password(mem_ctx,
1416                                           auth_context,
1417                                           user_info,
1418                                           &server_info,
1419                                           pauthoritative);
1420         if (!NT_STATUS_IS_OK(status)) {
1421                 TALLOC_FREE(frame);
1422                 return status;
1423         }
1424
1425         info3 = talloc_zero(mem_ctx, struct netr_SamInfo3);
1426         if (info3 == NULL) {
1427                 TALLOC_FREE(frame);
1428                 return NT_STATUS_NO_MEMORY;
1429         }
1430
1431         status = serverinfo_to_SamInfo3(server_info, info3);
1432         if (!NT_STATUS_IS_OK(status)) {
1433                 TALLOC_FREE(frame);
1434                 TALLOC_FREE(info3);
1435                 DEBUG(0, ("serverinfo_to_SamInfo3 failed: %s\n",
1436                           nt_errstr(status)));
1437                 return status;
1438         }
1439
1440         *pinfo3 = info3;
1441         DEBUG(10, ("Authenticaticating user %s\\%s returned %s\n", domain,
1442                    user, nt_errstr(status)));
1443         TALLOC_FREE(frame);
1444         return status;
1445 }
1446
1447 static NTSTATUS winbind_samlogon_retry_loop(struct winbindd_domain *domain,
1448                                             TALLOC_CTX *mem_ctx,
1449                                             uint32_t logon_parameters,
1450                                             const char *username,
1451                                             const char *password,
1452                                             const char *domainname,
1453                                             const char *workstation,
1454                                             bool plaintext_given,
1455                                             const uint8_t chal[8],
1456                                             DATA_BLOB lm_response,
1457                                             DATA_BLOB nt_response,
1458                                             bool interactive,
1459                                             uint8_t *authoritative,
1460                                             uint32_t *flags,
1461                                             uint16_t *_validation_level,
1462                                             union netr_Validation **_validation)
1463 {
1464         int attempts = 0;
1465         int netr_attempts = 0;
1466         bool retry = false;
1467         NTSTATUS result;
1468         enum netr_LogonInfoClass logon_type_i;
1469         enum netr_LogonInfoClass logon_type_n;
1470         uint16_t validation_level = UINT16_MAX;
1471         union netr_Validation *validation = NULL;
1472
1473         do {
1474                 struct rpc_pipe_client *netlogon_pipe;
1475                 struct netlogon_creds_cli_context *netlogon_creds_ctx = NULL;
1476
1477                 retry = false;
1478
1479                 result = cm_connect_netlogon_secure(domain, &netlogon_pipe,
1480                                                     &netlogon_creds_ctx);
1481
1482                 if (NT_STATUS_EQUAL(result,
1483                                     NT_STATUS_CANT_ACCESS_DOMAIN_INFO)) {
1484                         /*
1485                          * This means we don't have a trust account.
1486                          */
1487                         *authoritative = 0;
1488                         result = NT_STATUS_NO_SUCH_USER;
1489                         break;
1490                 }
1491
1492                 if (!NT_STATUS_IS_OK(result)) {
1493                         DEBUG(3,("Could not open handle to NETLOGON pipe "
1494                                  "(error: %s, attempts: %d)\n",
1495                                   nt_errstr(result), netr_attempts));
1496
1497                         /* After the first retry always close the connection */
1498                         if (netr_attempts > 0) {
1499                                 DEBUG(3, ("This is again a problem for this "
1500                                           "particular call, forcing the close "
1501                                           "of this connection\n"));
1502                                 invalidate_cm_connection(domain);
1503                         }
1504
1505                         /* After the second retry failover to the next DC */
1506                         if (netr_attempts > 1) {
1507                                 /*
1508                                  * If the netlogon server is not reachable then
1509                                  * it is possible that the DC is rebuilding
1510                                  * sysvol and shutdown netlogon for that time.
1511                                  * We should failover to the next dc.
1512                                  */
1513                                 DEBUG(3, ("This is the third problem for this "
1514                                           "particular call, adding DC to the "
1515                                           "negative cache list: %s %s\n", domain->name, domain->dcname));
1516                                 add_failed_connection_entry(domain->name,
1517                                                             domain->dcname,
1518                                                             result);
1519                                 saf_delete(domain->name);
1520                         }
1521
1522                         /* Only allow 3 retries */
1523                         if (netr_attempts < 3) {
1524                                 DEBUG(3, ("The connection to netlogon "
1525                                           "failed, retrying\n"));
1526                                 netr_attempts++;
1527                                 retry = true;
1528                                 continue;
1529                         }
1530                         return result;
1531                 }
1532
1533                 logon_type_i = NetlogonInteractiveInformation;
1534                 logon_type_n = NetlogonNetworkInformation;
1535                 if (domain->domain_trust_attribs & LSA_TRUST_ATTRIBUTE_WITHIN_FOREST) {
1536                         logon_type_i = NetlogonInteractiveTransitiveInformation;
1537                         logon_type_n = NetlogonNetworkTransitiveInformation;
1538                 }
1539
1540                 if (domain->domain_trust_attribs & LSA_TRUST_ATTRIBUTE_FOREST_TRANSITIVE) {
1541                         logon_type_i = NetlogonInteractiveTransitiveInformation;
1542                         logon_type_n = NetlogonNetworkTransitiveInformation;
1543                 }
1544
1545                 if (domain->domain_trust_attribs & LSA_TRUST_ATTRIBUTE_NON_TRANSITIVE) {
1546                         logon_type_i = NetlogonInteractiveInformation;
1547                         logon_type_n = NetlogonNetworkInformation;
1548                 }
1549
1550                 if (domain->domain_trust_attribs & LSA_TRUST_ATTRIBUTE_QUARANTINED_DOMAIN) {
1551                         logon_type_i = NetlogonInteractiveInformation;
1552                         logon_type_n = NetlogonNetworkInformation;
1553                 }
1554
1555                 netr_attempts = 0;
1556                 if (plaintext_given) {
1557                         result = rpccli_netlogon_password_logon(
1558                                 netlogon_creds_ctx,
1559                                 netlogon_pipe->binding_handle,
1560                                 mem_ctx,
1561                                 logon_parameters,
1562                                 domainname,
1563                                 username,
1564                                 password,
1565                                 workstation,
1566                                 logon_type_i,
1567                                 authoritative,
1568                                 flags,
1569                                 &validation_level,
1570                                 &validation);
1571                 } else if (interactive) {
1572                         result = rpccli_netlogon_interactive_logon(
1573                                 netlogon_creds_ctx,
1574                                 netlogon_pipe->binding_handle,
1575                                 mem_ctx,
1576                                 logon_parameters,
1577                                 username,
1578                                 domainname,
1579                                 workstation,
1580                                 lm_response,
1581                                 nt_response,
1582                                 logon_type_i,
1583                                 authoritative,
1584                                 flags,
1585                                 &validation_level,
1586                                 &validation);
1587                 } else {
1588                         result = rpccli_netlogon_network_logon(
1589                                 netlogon_creds_ctx,
1590                                 netlogon_pipe->binding_handle,
1591                                 mem_ctx,
1592                                 logon_parameters,
1593                                 username,
1594                                 domainname,
1595                                 workstation,
1596                                 chal,
1597                                 lm_response,
1598                                 nt_response,
1599                                 logon_type_n,
1600                                 authoritative,
1601                                 flags,
1602                                 &validation_level,
1603                                 &validation);
1604                 }
1605
1606                 /*
1607                  * we increment this after the "feature negotiation"
1608                  * for can_do_samlogon_ex and can_do_validation6
1609                  */
1610                 attempts += 1;
1611
1612                 /* We have to try a second time as cm_connect_netlogon
1613                    might not yet have noticed that the DC has killed
1614                    our connection. */
1615
1616                 if (!rpccli_is_connected(netlogon_pipe)) {
1617                         retry = true;
1618                         continue;
1619                 }
1620
1621                 /* if we get access denied, a possible cause was that we had
1622                    and open connection to the DC, but someone changed our
1623                    machine account password out from underneath us using 'net
1624                    rpc changetrustpw' */
1625
1626                 if ( NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED) ) {
1627                         DEBUG(1,("winbind_samlogon_retry_loop: sam_logon returned "
1628                                  "ACCESS_DENIED.  Maybe the DC has Restrict "
1629                                  "NTLM set or the trust account "
1630                                 "password was changed and we didn't know it. "
1631                                  "Killing connections to domain %s\n",
1632                                 domainname));
1633                         invalidate_cm_connection(domain);
1634                         retry = true;
1635                 }
1636
1637                 if (NT_STATUS_EQUAL(result, NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE)) {
1638                         /*
1639                          * Got DCERPC_FAULT_OP_RNG_ERROR for SamLogon
1640                          * (no Ex). This happens against old Samba
1641                          * DCs, if LogonSamLogonEx() fails with an error
1642                          * e.g. NT_STATUS_NO_SUCH_USER or NT_STATUS_WRONG_PASSWORD.
1643                          *
1644                          * The server will log something like this:
1645                          * api_net_sam_logon_ex: Failed to marshall NET_R_SAM_LOGON_EX.
1646                          *
1647                          * This sets the whole connection into a fault_state mode
1648                          * and all following request get NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE.
1649                          *
1650                          * This also happens to our retry with LogonSamLogonWithFlags()
1651                          * and LogonSamLogon().
1652                          *
1653                          * In order to recover from this situation, we need to
1654                          * drop the connection.
1655                          */
1656                         invalidate_cm_connection(domain);
1657                         result = NT_STATUS_LOGON_FAILURE;
1658                         break;
1659                 }
1660
1661         } while ( (attempts < 2) && retry );
1662
1663         if (NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT)) {
1664                 DEBUG(3,("winbind_samlogon_retry_loop: sam_network_logon(ex) "
1665                                 "returned NT_STATUS_IO_TIMEOUT after the retry. "
1666                                 "Killing connections to domain %s\n",
1667                         domainname));
1668                 invalidate_cm_connection(domain);
1669         }
1670
1671         if (!NT_STATUS_IS_OK(result)) {
1672                 return result;
1673         }
1674
1675         *_validation_level = validation_level;
1676         *_validation = validation;
1677         return NT_STATUS_OK;
1678 }
1679
1680 static NTSTATUS winbindd_dual_pam_auth_samlogon(
1681         TALLOC_CTX *mem_ctx,
1682         struct winbindd_domain *domain,
1683         const char *user,
1684         const char *pass,
1685         uint32_t request_flags,
1686         uint16_t *_validation_level,
1687         union netr_Validation **_validation)
1688 {
1689
1690         uchar chal[8];
1691         DATA_BLOB lm_resp;
1692         DATA_BLOB nt_resp;
1693         unsigned char local_nt_response[24];
1694         fstring name_namespace, name_domain, name_user;
1695         NTSTATUS result;
1696         uint8_t authoritative = 0;
1697         uint32_t flags = 0;
1698         uint16_t validation_level;
1699         union netr_Validation *validation = NULL;
1700         struct netr_SamBaseInfo *base_info = NULL;
1701         bool ok;
1702
1703         DEBUG(10,("winbindd_dual_pam_auth_samlogon\n"));
1704
1705         /* Parse domain and username */
1706
1707         ok = parse_domain_user(user, name_namespace, name_domain, name_user);
1708         if (!ok) {
1709                 return NT_STATUS_INVALID_PARAMETER;
1710         }
1711
1712         /*
1713          * We check against domain->name instead of
1714          * name_domain, as find_auth_domain() ->
1715          * find_domain_from_name_noinit() already decided
1716          * that we are in a child for the correct domain.
1717          *
1718          * name_domain can also be lp_realm()
1719          * we need to check against domain->name.
1720          */
1721         if (strequal(domain->name, get_global_sam_name())) {
1722                 DATA_BLOB chal_blob = data_blob_const(chal, sizeof(chal));
1723                 struct netr_SamInfo3 *info3 = NULL;
1724
1725                 /* do password magic */
1726
1727                 generate_random_buffer(chal, sizeof(chal));
1728
1729                 if (lp_client_ntlmv2_auth()) {
1730                         DATA_BLOB server_chal;
1731                         DATA_BLOB names_blob;
1732                         server_chal = data_blob_const(chal, 8);
1733
1734                         /* note that the 'workgroup' here is for the local
1735                            machine.  The 'server name' must match the
1736                            'workstation' passed to the actual SamLogon call.
1737                         */
1738                         names_blob = NTLMv2_generate_names_blob(
1739                                 mem_ctx, lp_netbios_name(), lp_workgroup());
1740
1741                         if (!SMBNTLMv2encrypt(mem_ctx, name_user, name_domain,
1742                                               pass,
1743                                               &server_chal,
1744                                               &names_blob,
1745                                               &lm_resp, &nt_resp, NULL, NULL)) {
1746                                 data_blob_free(&names_blob);
1747                                 DEBUG(0, ("winbindd_pam_auth: SMBNTLMv2encrypt() failed!\n"));
1748                                 result = NT_STATUS_NO_MEMORY;
1749                                 goto done;
1750                         }
1751                         data_blob_free(&names_blob);
1752                 } else {
1753                         lm_resp = data_blob_null;
1754                         SMBNTencrypt(pass, chal, local_nt_response);
1755
1756                         nt_resp = data_blob_talloc(mem_ctx, local_nt_response,
1757                                                    sizeof(local_nt_response));
1758                 }
1759
1760                 result = winbindd_dual_auth_passdb(
1761                         talloc_tos(), 0, name_domain, name_user,
1762                         &chal_blob, &lm_resp, &nt_resp,
1763                         true, /* interactive */
1764                         &authoritative,
1765                         &info3);
1766
1767                 /*
1768                  * We need to try the remote NETLOGON server if this is
1769                  * not authoritative (for example on the RODC).
1770                  */
1771                 if (authoritative != 0) {
1772                         if (NT_STATUS_IS_OK(result)) {
1773                                 result = map_info3_to_validation(
1774                                                 mem_ctx,
1775                                                 info3,
1776                                                 &validation_level,
1777                                                 &validation);
1778                                 TALLOC_FREE(info3);
1779                                 if (!NT_STATUS_IS_OK(result)) {
1780                                         goto done;
1781                                 }
1782                         }
1783
1784                         goto done;
1785                 }
1786         }
1787
1788         /* check authentication loop */
1789
1790         result = winbind_samlogon_retry_loop(domain,
1791                                              mem_ctx,
1792                                              0,
1793                                              name_user,
1794                                              pass,
1795                                              name_domain,
1796                                              lp_netbios_name(),
1797                                              true, /* plaintext_given */
1798                                              NULL,
1799                                              data_blob_null, data_blob_null,
1800                                              true, /* interactive */
1801                                              &authoritative,
1802                                              &flags,
1803                                              &validation_level,
1804                                              &validation);
1805         if (!NT_STATUS_IS_OK(result)) {
1806                 goto done;
1807         }
1808
1809         /* handle the case where a NT4 DC does not fill in the acct_flags in
1810          * the samlogon reply info3. When accurate info3 is required by the
1811          * caller, we look up the account flags ourselves - gd */
1812
1813         switch (validation_level) {
1814         case 3:
1815                 base_info = &validation->sam3->base;
1816                 break;
1817         case 6:
1818                 base_info = &validation->sam6->base;
1819                 break;
1820         default:
1821                 DBG_ERR("Bad validation level %d", (int)validation_level);
1822                 result = NT_STATUS_INTERNAL_ERROR;
1823                 goto done;
1824         }
1825         if ((request_flags & WBFLAG_PAM_INFO3_TEXT) &&
1826             (base_info->acct_flags == 0))
1827         {
1828                 struct rpc_pipe_client *samr_pipe;
1829                 struct policy_handle samr_domain_handle, user_pol;
1830                 union samr_UserInfo *info = NULL;
1831                 NTSTATUS status_tmp, result_tmp;
1832                 uint32_t acct_flags;
1833                 struct dcerpc_binding_handle *b;
1834
1835                 status_tmp = cm_connect_sam(domain, mem_ctx, false,
1836                                             &samr_pipe, &samr_domain_handle);
1837
1838                 if (!NT_STATUS_IS_OK(status_tmp)) {
1839                         DEBUG(3, ("could not open handle to SAMR pipe: %s\n",
1840                                 nt_errstr(status_tmp)));
1841                         goto done;
1842                 }
1843
1844                 b = samr_pipe->binding_handle;
1845
1846                 status_tmp = dcerpc_samr_OpenUser(b, mem_ctx,
1847                                                   &samr_domain_handle,
1848                                                   MAXIMUM_ALLOWED_ACCESS,
1849                                                   base_info->rid,
1850                                                   &user_pol,
1851                                                   &result_tmp);
1852
1853                 if (!NT_STATUS_IS_OK(status_tmp)) {
1854                         DEBUG(3, ("could not open user handle on SAMR pipe: %s\n",
1855                                 nt_errstr(status_tmp)));
1856                         goto done;
1857                 }
1858                 if (!NT_STATUS_IS_OK(result_tmp)) {
1859                         DEBUG(3, ("could not open user handle on SAMR pipe: %s\n",
1860                                 nt_errstr(result_tmp)));
1861                         goto done;
1862                 }
1863
1864                 status_tmp = dcerpc_samr_QueryUserInfo(b, mem_ctx,
1865                                                        &user_pol,
1866                                                        16,
1867                                                        &info,
1868                                                        &result_tmp);
1869
1870                 if (any_nt_status_not_ok(status_tmp, result_tmp,
1871                                          &status_tmp)) {
1872                         DEBUG(3, ("could not query user info on SAMR pipe: %s\n",
1873                                 nt_errstr(status_tmp)));
1874                         dcerpc_samr_Close(b, mem_ctx, &user_pol, &result_tmp);
1875                         goto done;
1876                 }
1877
1878                 acct_flags = info->info16.acct_flags;
1879
1880                 if (acct_flags == 0) {
1881                         dcerpc_samr_Close(b, mem_ctx, &user_pol, &result_tmp);
1882                         goto done;
1883                 }
1884
1885                 base_info->acct_flags = acct_flags;
1886
1887                 DEBUG(10,("successfully retrieved acct_flags 0x%x\n", acct_flags));
1888
1889                 dcerpc_samr_Close(b, mem_ctx, &user_pol, &result_tmp);
1890         }
1891
1892 done:
1893         if (NT_STATUS_IS_OK(result)) {
1894                 *_validation_level = validation_level;
1895                 *_validation = validation;
1896         }
1897         return result;
1898 }
1899
1900 enum winbindd_result winbindd_dual_pam_auth(struct winbindd_domain *domain,
1901                                             struct winbindd_cli_state *state)
1902 {
1903         NTSTATUS result = NT_STATUS_LOGON_FAILURE;
1904         NTSTATUS krb5_result = NT_STATUS_OK;
1905         fstring name_namespace, name_domain, name_user;
1906         char *mapped_user;
1907         fstring domain_user;
1908         uint16_t validation_level = UINT16_MAX;
1909         union netr_Validation *validation = NULL;
1910         NTSTATUS name_map_status = NT_STATUS_UNSUCCESSFUL;
1911         bool ok;
1912
1913         /* Ensure null termination */
1914         state->request->data.auth.user[sizeof(state->request->data.auth.user)-1]='\0';
1915
1916         /* Ensure null termination */
1917         state->request->data.auth.pass[sizeof(state->request->data.auth.pass)-1]='\0';
1918
1919         DEBUG(3, ("[%5lu]: dual pam auth %s\n", (unsigned long)state->pid,
1920                   state->request->data.auth.user));
1921
1922         /* Parse domain and username */
1923
1924         name_map_status = normalize_name_unmap(state->mem_ctx,
1925                                                state->request->data.auth.user,
1926                                                &mapped_user);
1927
1928         /* If the name normalization didnt' actually do anything,
1929            just use the original name */
1930
1931         if (!NT_STATUS_IS_OK(name_map_status) &&
1932             !NT_STATUS_EQUAL(name_map_status, NT_STATUS_FILE_RENAMED))
1933         {
1934                 mapped_user = state->request->data.auth.user;
1935         }
1936
1937         ok = parse_domain_user(mapped_user,
1938                                name_namespace,
1939                                name_domain,
1940                                name_user);
1941         if (!ok) {
1942                 result = NT_STATUS_INVALID_PARAMETER;
1943                 goto process_result;
1944         }
1945
1946         if ( mapped_user != state->request->data.auth.user ) {
1947                 fstr_sprintf( domain_user, "%s%c%s", name_domain,
1948                         *lp_winbind_separator(),
1949                         name_user );
1950                 strlcpy( state->request->data.auth.user, domain_user,
1951                              sizeof(state->request->data.auth.user));
1952         }
1953
1954         if (!domain->online) {
1955                 result = NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND;
1956                 if (domain->startup) {
1957                         /* Logons are very important to users. If we're offline and
1958                            we get a request within the first 30 seconds of startup,
1959                            try very hard to find a DC and go online. */
1960
1961                         DEBUG(10,("winbindd_dual_pam_auth: domain: %s offline and auth "
1962                                 "request in startup mode.\n", domain->name ));
1963
1964                         winbindd_flush_negative_conn_cache(domain);
1965                         result = init_dc_connection(domain, false);
1966                 }
1967         }
1968
1969         DEBUG(10,("winbindd_dual_pam_auth: domain: %s last was %s\n", domain->name, domain->online ? "online":"offline"));
1970
1971         /* Check for Kerberos authentication */
1972         if (domain->online && (state->request->flags & WBFLAG_PAM_KRB5)) {
1973                 struct netr_SamInfo6 *info6 = NULL;
1974
1975                 result = winbindd_dual_pam_auth_kerberos(domain, state, &info6);
1976                 /* save for later */
1977                 krb5_result = result;
1978
1979                 if (NT_STATUS_IS_OK(result)) {
1980                         DEBUG(10,("winbindd_dual_pam_auth_kerberos succeeded\n"));
1981
1982                         result = map_info6_to_validation(state->mem_ctx,
1983                                                          info6,
1984                                                          &validation_level,
1985                                                          &validation);
1986                         TALLOC_FREE(info6);
1987                         if (!NT_STATUS_IS_OK(result)) {
1988                                 DBG_ERR("map_info6_to_validation failed\n");
1989                                 goto done;
1990                         }
1991                         goto process_result;
1992                 }
1993
1994                 DBG_DEBUG("winbindd_dual_pam_auth_kerberos failed: %s\n",
1995                           nt_errstr(result));
1996
1997                 if (NT_STATUS_EQUAL(result, NT_STATUS_NO_LOGON_SERVERS) ||
1998                     NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT) ||
1999                     NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND)) {
2000                         DEBUG(10,("winbindd_dual_pam_auth_kerberos setting domain to offline\n"));
2001                         set_domain_offline( domain );
2002                         goto cached_logon;
2003                 }
2004
2005                 /* there are quite some NT_STATUS errors where there is no
2006                  * point in retrying with a samlogon, we explictly have to take
2007                  * care not to increase the bad logon counter on the DC */
2008
2009                 if (NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_DISABLED) ||
2010                     NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_EXPIRED) ||
2011                     NT_STATUS_EQUAL(result, NT_STATUS_ACCOUNT_LOCKED_OUT) ||
2012                     NT_STATUS_EQUAL(result, NT_STATUS_INVALID_LOGON_HOURS) ||
2013                     NT_STATUS_EQUAL(result, NT_STATUS_INVALID_WORKSTATION) ||
2014                     NT_STATUS_EQUAL(result, NT_STATUS_LOGON_FAILURE) ||
2015                     NT_STATUS_EQUAL(result, NT_STATUS_NO_SUCH_USER) ||
2016                     NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_EXPIRED) ||
2017                     NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_MUST_CHANGE) ||
2018                     NT_STATUS_EQUAL(result, NT_STATUS_WRONG_PASSWORD)) {
2019                         goto done;
2020                 }
2021
2022                 if (state->request->flags & WBFLAG_PAM_FALLBACK_AFTER_KRB5) {
2023                         DEBUG(3,("falling back to samlogon\n"));
2024                         goto sam_logon;
2025                 } else {
2026                         goto cached_logon;
2027                 }
2028         }
2029
2030 sam_logon:
2031         /* Check for Samlogon authentication */
2032         if (domain->online) {
2033                 struct netr_SamBaseInfo *base_info = NULL;
2034
2035                 result = winbindd_dual_pam_auth_samlogon(
2036                         state->mem_ctx, domain,
2037                         state->request->data.auth.user,
2038                         state->request->data.auth.pass,
2039                         state->request->flags,
2040                         &validation_level,
2041                         &validation);
2042
2043                 if (NT_STATUS_IS_OK(result)) {
2044                         DEBUG(10,("winbindd_dual_pam_auth_samlogon succeeded\n"));
2045
2046                         switch (validation_level) {
2047                         case 3:
2048                                 base_info = &validation->sam3->base;
2049                                 break;
2050                         case 6:
2051                                 base_info = &validation->sam6->base;
2052                                 break;
2053                         default:
2054                                 DBG_ERR("Bad validation level %d\n",
2055                                         validation_level);
2056                                 result = NT_STATUS_INTERNAL_ERROR;
2057                                 goto done;
2058                         }
2059
2060                         /* add the Krb5 err if we have one */
2061                         if ( NT_STATUS_EQUAL(krb5_result, NT_STATUS_TIME_DIFFERENCE_AT_DC ) ) {
2062                                 base_info->user_flags |= LOGON_KRB5_FAIL_CLOCK_SKEW;
2063                         }
2064
2065                         goto process_result;
2066                 }
2067
2068                 DEBUG(10,("winbindd_dual_pam_auth_samlogon failed: %s\n",
2069                           nt_errstr(result)));
2070
2071                 if (NT_STATUS_EQUAL(result, NT_STATUS_NO_LOGON_SERVERS) ||
2072                     NT_STATUS_EQUAL(result, NT_STATUS_IO_TIMEOUT) ||
2073                     NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND))
2074                 {
2075                         DEBUG(10,("winbindd_dual_pam_auth_samlogon setting domain to offline\n"));
2076                         set_domain_offline( domain );
2077                         goto cached_logon;
2078                 }
2079
2080                 if (domain->online) {
2081                         /* We're still online - fail. */
2082                         goto done;
2083                 }
2084         }
2085
2086 cached_logon:
2087         /* Check for Cached logons */
2088         if (!domain->online && (state->request->flags & WBFLAG_PAM_CACHED_LOGIN) &&
2089             lp_winbind_offline_logon()) {
2090                 struct netr_SamInfo3 *info3 = NULL;
2091
2092                 result = winbindd_dual_pam_auth_cached(domain, state, &info3);
2093
2094                 if (!NT_STATUS_IS_OK(result)) {
2095                         DEBUG(10,("winbindd_dual_pam_auth_cached failed: %s\n", nt_errstr(result)));
2096                         goto done;
2097                 }
2098                 DEBUG(10,("winbindd_dual_pam_auth_cached succeeded\n"));
2099
2100                 result = map_info3_to_validation(state->mem_ctx,
2101                                                  info3,
2102                                                  &validation_level,
2103                                                  &validation);
2104                 TALLOC_FREE(info3);
2105                 if (!NT_STATUS_IS_OK(result)) {
2106                         DBG_ERR("map_info3_to_validation failed\n");
2107                         goto done;
2108                 }
2109         }
2110
2111 process_result:
2112
2113         if (NT_STATUS_IS_OK(result)) {
2114                 struct dom_sid user_sid;
2115                 TALLOC_CTX *base_ctx = NULL;
2116                 struct netr_SamBaseInfo *base_info = NULL;
2117                 struct netr_SamInfo3 *info3 = NULL;
2118
2119                 switch (validation_level) {
2120                 case 3:
2121                         base_ctx = validation->sam3;
2122                         base_info = &validation->sam3->base;
2123                         break;
2124                 case 6:
2125                         base_ctx = validation->sam6;
2126                         base_info = &validation->sam6->base;
2127                         break;
2128                 default:
2129                         result = NT_STATUS_INTERNAL_ERROR;
2130                         goto done;
2131                 }
2132
2133                 sid_compose(&user_sid, base_info->domain_sid, base_info->rid);
2134
2135                 if (base_info->full_name.string == NULL) {
2136                         struct netr_SamInfo3 *cached_info3;
2137
2138                         cached_info3 = netsamlogon_cache_get(state->mem_ctx,
2139                                                              &user_sid);
2140                         if (cached_info3 != NULL &&
2141                             cached_info3->base.full_name.string != NULL) {
2142                                 base_info->full_name.string = talloc_strdup(
2143                                         base_ctx,
2144                                         cached_info3->base.full_name.string);
2145                                 if (base_info->full_name.string == NULL) {
2146                                         result = NT_STATUS_NO_MEMORY;
2147                                         goto done;
2148                                 }
2149                         } else {
2150
2151                                 /* this might fail so we don't check the return code */
2152                                 wcache_query_user_fullname(domain,
2153                                                 base_ctx,
2154                                                 &user_sid,
2155                                                 &base_info->full_name.string);
2156                         }
2157                 }
2158
2159                 result = map_validation_to_info3(talloc_tos(),
2160                                                  validation_level,
2161                                                  validation,
2162                                                  &info3);
2163                 if (!NT_STATUS_IS_OK(result)) {
2164                         goto done;
2165                 }
2166
2167                 wcache_invalidate_samlogon(find_domain_from_name(name_domain),
2168                                            &user_sid);
2169                 netsamlogon_cache_store(name_user, info3);
2170
2171                 /* save name_to_sid info as early as possible (only if
2172                    this is our primary domain so we don't invalidate
2173                    the cache entry by storing the seq_num for the wrong
2174                    domain). */
2175                 if ( domain->primary ) {
2176                         cache_name2sid(domain, name_domain, name_user,
2177                                        SID_NAME_USER, &user_sid);
2178                 }
2179
2180                 /* Check if the user is in the right group */
2181
2182                 result = check_info3_in_group(
2183                         info3,
2184                         state->request->data.auth.require_membership_of_sid);
2185                 if (!NT_STATUS_IS_OK(result)) {
2186                         DEBUG(3, ("User %s is not in the required group (%s), so plaintext authentication is rejected\n",
2187                                   state->request->data.auth.user,
2188                                   state->request->data.auth.require_membership_of_sid));
2189                         goto done;
2190                 }
2191
2192                 result = append_auth_data(state->mem_ctx, state->response,
2193                                           state->request->flags,
2194                                           validation_level,
2195                                           validation,
2196                                           name_domain, name_user);
2197                 if (!NT_STATUS_IS_OK(result)) {
2198                         goto done;
2199                 }
2200
2201                 if ((state->request->flags & WBFLAG_PAM_CACHED_LOGIN)
2202                     && lp_winbind_offline_logon()) {
2203
2204                         result = winbindd_store_creds(domain,
2205                                                       state->request->data.auth.user,
2206                                                       state->request->data.auth.pass,
2207                                                       info3);
2208                 }
2209
2210                 if (state->request->flags & WBFLAG_PAM_GET_PWD_POLICY) {
2211                         /*
2212                          * WBFLAG_PAM_GET_PWD_POLICY is not used within
2213                          * any Samba caller anymore.
2214                          *
2215                          * We just fake this based on the effective values
2216                          * for the user, for legacy callers.
2217                          */
2218                         fake_password_policy(state->response, &info3->base);
2219                 }
2220
2221                 result = NT_STATUS_OK;
2222         }
2223
2224 done:
2225         /* give us a more useful (more correct?) error code */
2226         if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) ||
2227             (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
2228                 result = NT_STATUS_NO_LOGON_SERVERS;
2229         }
2230
2231         set_auth_errors(state->response, result);
2232
2233         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2, ("Plain-text authentication for user %s returned %s (PAM: %d)\n",
2234               state->request->data.auth.user,
2235               state->response->data.auth.nt_status_string,
2236               state->response->data.auth.pam_error));
2237
2238         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2239 }
2240
2241 NTSTATUS winbind_dual_SamLogon(struct winbindd_domain *domain,
2242                                TALLOC_CTX *mem_ctx,
2243                                bool interactive,
2244                                uint32_t logon_parameters,
2245                                const char *name_user,
2246                                const char *name_domain,
2247                                const char *workstation,
2248                                const uint8_t chal[8],
2249                                DATA_BLOB lm_response,
2250                                DATA_BLOB nt_response,
2251                                uint8_t *authoritative,
2252                                bool skip_sam,
2253                                uint32_t *flags,
2254                                uint16_t *_validation_level,
2255                                union netr_Validation **_validation)
2256 {
2257         uint16_t validation_level = 0;
2258         union netr_Validation *validation = NULL;
2259         NTSTATUS result;
2260
2261         /*
2262          * We check against domain->name instead of
2263          * name_domain, as find_auth_domain() ->
2264          * find_domain_from_name_noinit() already decided
2265          * that we are in a child for the correct domain.
2266          *
2267          * name_domain can also be lp_realm()
2268          * we need to check against domain->name.
2269          */
2270         if (!skip_sam && strequal(domain->name, get_global_sam_name())) {
2271                 DATA_BLOB chal_blob = data_blob_const(
2272                         chal, 8);
2273                 struct netr_SamInfo3 *info3 = NULL;
2274
2275                 result = winbindd_dual_auth_passdb(
2276                         talloc_tos(),
2277                         logon_parameters,
2278                         name_domain, name_user,
2279                         &chal_blob, &lm_response, &nt_response,
2280                         interactive,
2281                         authoritative,
2282                         &info3);
2283                 if (NT_STATUS_IS_OK(result)) {
2284                         result = map_info3_to_validation(mem_ctx,
2285                                                          info3,
2286                                                          &validation_level,
2287                                                          &validation);
2288                         TALLOC_FREE(info3);
2289                         if (!NT_STATUS_IS_OK(result)) {
2290                                 goto done;
2291                         }
2292                 }
2293
2294                 /*
2295                  * We need to try the remote NETLOGON server if this is
2296                  * not authoritative.
2297                  */
2298                 if (*authoritative != 0) {
2299                         *flags = 0;
2300                         goto process_result;
2301                 }
2302         }
2303
2304         result = winbind_samlogon_retry_loop(domain,
2305                                              mem_ctx,
2306                                              logon_parameters,
2307                                              name_user,
2308                                              NULL, /* password */
2309                                              name_domain,
2310                                              /* Bug #3248 - found by Stefan Burkei. */
2311                                              workstation, /* We carefully set this above so use it... */
2312                                              false, /* plaintext_given */
2313                                              chal,
2314                                              lm_response,
2315                                              nt_response,
2316                                              interactive,
2317                                              authoritative,
2318                                              flags,
2319                                              &validation_level,
2320                                              &validation);
2321         if (!NT_STATUS_IS_OK(result)) {
2322                 goto done;
2323         }
2324
2325 process_result:
2326
2327         if (NT_STATUS_IS_OK(result)) {
2328                 struct dom_sid user_sid;
2329                 TALLOC_CTX *base_ctx = NULL;
2330                 struct netr_SamBaseInfo *base_info = NULL;
2331                 struct netr_SamInfo3 *info3 = NULL;
2332
2333                 switch (validation_level) {
2334                 case 3:
2335                         base_ctx = validation->sam3;
2336                         base_info = &validation->sam3->base;
2337                         break;
2338                 case 6:
2339                         base_ctx = validation->sam6;
2340                         base_info = &validation->sam6->base;
2341                         break;
2342                 default:
2343                         result = NT_STATUS_INTERNAL_ERROR;
2344                         goto done;
2345                 }
2346
2347                 sid_compose(&user_sid, base_info->domain_sid, base_info->rid);
2348
2349                 if (base_info->full_name.string == NULL) {
2350                         struct netr_SamInfo3 *cached_info3;
2351
2352                         cached_info3 = netsamlogon_cache_get(mem_ctx,
2353                                                              &user_sid);
2354                         if (cached_info3 != NULL &&
2355                             cached_info3->base.full_name.string != NULL)
2356                         {
2357                                 base_info->full_name.string = talloc_strdup(
2358                                         base_ctx,
2359                                         cached_info3->base.full_name.string);
2360                         } else {
2361
2362                                 /* this might fail so we don't check the return code */
2363                                 wcache_query_user_fullname(domain,
2364                                                 base_ctx,
2365                                                 &user_sid,
2366                                                 &base_info->full_name.string);
2367                         }
2368                 }
2369
2370                 result = map_validation_to_info3(talloc_tos(),
2371                                                  validation_level,
2372                                                  validation,
2373                                                  &info3);
2374                 if (!NT_STATUS_IS_OK(result)) {
2375                         goto done;
2376                 }
2377                 wcache_invalidate_samlogon(find_domain_from_name(name_domain),
2378                                            &user_sid);
2379                 netsamlogon_cache_store(name_user, info3);
2380                 TALLOC_FREE(info3);
2381         }
2382
2383 done:
2384
2385         /* give us a more useful (more correct?) error code */
2386         if ((NT_STATUS_EQUAL(result, NT_STATUS_DOMAIN_CONTROLLER_NOT_FOUND) ||
2387             (NT_STATUS_EQUAL(result, NT_STATUS_UNSUCCESSFUL)))) {
2388                 result = NT_STATUS_NO_LOGON_SERVERS;
2389         }
2390
2391         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
2392               ("NTLM CRAP authentication for user [%s]\\[%s] returned %s\n",
2393                name_domain,
2394                name_user,
2395                nt_errstr(result)));
2396
2397         if (!NT_STATUS_IS_OK(result)) {
2398                 return result;
2399         }
2400
2401         *_validation_level = validation_level;
2402         *_validation = validation;
2403         return NT_STATUS_OK;
2404 }
2405
2406 enum winbindd_result winbindd_dual_pam_auth_crap(struct winbindd_domain *domain,
2407                                                  struct winbindd_cli_state *state)
2408 {
2409         NTSTATUS result;
2410         const char *name_user = NULL;
2411         const char *name_domain = NULL;
2412         const char *workstation;
2413         uint8_t authoritative = 0;
2414         uint32_t flags = 0;
2415         uint16_t validation_level;
2416         union netr_Validation *validation = NULL;
2417         DATA_BLOB lm_resp, nt_resp;
2418
2419         /* This is child-only, so no check for privileged access is needed
2420            anymore */
2421
2422         /* Ensure null termination */
2423         state->request->data.auth_crap.user[sizeof(state->request->data.auth_crap.user)-1]=0;
2424         state->request->data.auth_crap.domain[sizeof(state->request->data.auth_crap.domain)-1]=0;
2425
2426         name_user = state->request->data.auth_crap.user;
2427         name_domain = state->request->data.auth_crap.domain;
2428         workstation = state->request->data.auth_crap.workstation;
2429
2430         DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n", (unsigned long)state->pid,
2431                   name_domain, name_user));
2432
2433         if (state->request->data.auth_crap.lm_resp_len > sizeof(state->request->data.auth_crap.lm_resp)
2434                 || state->request->data.auth_crap.nt_resp_len > sizeof(state->request->data.auth_crap.nt_resp)) {
2435                 if (!(state->request->flags & WBFLAG_BIG_NTLMV2_BLOB) ||
2436                      state->request->extra_len != state->request->data.auth_crap.nt_resp_len) {
2437                         DEBUG(0, ("winbindd_pam_auth_crap: invalid password length %u/%u\n",
2438                                   state->request->data.auth_crap.lm_resp_len,
2439                                   state->request->data.auth_crap.nt_resp_len));
2440                         result = NT_STATUS_INVALID_PARAMETER;
2441                         goto done;
2442                 }
2443         }
2444
2445         lm_resp = data_blob_talloc(state->mem_ctx, state->request->data.auth_crap.lm_resp,
2446                                         state->request->data.auth_crap.lm_resp_len);
2447
2448         if (state->request->flags & WBFLAG_BIG_NTLMV2_BLOB) {
2449                 nt_resp = data_blob_talloc(state->mem_ctx,
2450                                            state->request->extra_data.data,
2451                                            state->request->data.auth_crap.nt_resp_len);
2452         } else {
2453                 nt_resp = data_blob_talloc(state->mem_ctx,
2454                                            state->request->data.auth_crap.nt_resp,
2455                                            state->request->data.auth_crap.nt_resp_len);
2456         }
2457
2458         result = winbind_dual_SamLogon(domain,
2459                                        state->mem_ctx,
2460                                        false, /* interactive */
2461                                        state->request->data.auth_crap.logon_parameters,
2462                                        name_user,
2463                                        name_domain,
2464                                        /* Bug #3248 - found by Stefan Burkei. */
2465                                        workstation, /* We carefully set this above so use it... */
2466                                        state->request->data.auth_crap.chal,
2467                                        lm_resp,
2468                                        nt_resp,
2469                                        &authoritative,
2470                                        false,
2471                                        &flags,
2472                                        &validation_level,
2473                                        &validation);
2474         if (!NT_STATUS_IS_OK(result)) {
2475                 state->response->data.auth.authoritative = authoritative;
2476                 goto done;
2477         }
2478
2479         if (NT_STATUS_IS_OK(result)) {
2480                 struct netr_SamInfo3 *info3 = NULL;
2481
2482                 result = map_validation_to_info3(state->mem_ctx,
2483                                                  validation_level,
2484                                                  validation,
2485                                                  &info3);
2486                 if (!NT_STATUS_IS_OK(result)) {
2487                         goto done;
2488                 }
2489
2490                 /* Check if the user is in the right group */
2491                 result = check_info3_in_group(
2492                         info3,
2493                         state->request->data.auth_crap.require_membership_of_sid);
2494                 if (!NT_STATUS_IS_OK(result)) {
2495                         DEBUG(3, ("User %s is not in the required group (%s), so "
2496                                   "crap authentication is rejected\n",
2497                                   state->request->data.auth_crap.user,
2498                                   state->request->data.auth_crap.require_membership_of_sid));
2499                         goto done;
2500                 }
2501
2502                 result = append_auth_data(state->mem_ctx, state->response,
2503                                           state->request->flags,
2504                                           validation_level,
2505                                           validation,
2506                                           name_domain, name_user);
2507                 if (!NT_STATUS_IS_OK(result)) {
2508                         goto done;
2509                 }
2510         }
2511
2512 done:
2513
2514         if (state->request->flags & WBFLAG_PAM_NT_STATUS_SQUASH) {
2515                 result = nt_status_squash(result);
2516         }
2517
2518         set_auth_errors(state->response, result);
2519
2520         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2521 }
2522
2523 enum winbindd_result winbindd_dual_pam_chauthtok(struct winbindd_domain *contact_domain,
2524                                                  struct winbindd_cli_state *state)
2525 {
2526         char *oldpass;
2527         char *newpass = NULL;
2528         struct policy_handle dom_pol;
2529         struct rpc_pipe_client *cli = NULL;
2530         bool got_info = false;
2531         struct samr_DomInfo1 *info = NULL;
2532         struct userPwdChangeFailureInformation *reject = NULL;
2533         NTSTATUS result = NT_STATUS_UNSUCCESSFUL;
2534         fstring namespace, domain, user;
2535         struct dcerpc_binding_handle *b = NULL;
2536         bool ok;
2537
2538         ZERO_STRUCT(dom_pol);
2539
2540         DEBUG(3, ("[%5lu]: dual pam chauthtok %s\n", (unsigned long)state->pid,
2541                   state->request->data.auth.user));
2542
2543         ok = parse_domain_user(state->request->data.chauthtok.user,
2544                                namespace,
2545                                domain,
2546                                user);
2547         if (!ok) {
2548                 goto done;
2549         }
2550
2551         /* Change password */
2552
2553         oldpass = state->request->data.chauthtok.oldpass;
2554         newpass = state->request->data.chauthtok.newpass;
2555
2556         /* Initialize reject reason */
2557         state->response->data.auth.reject_reason = Undefined;
2558
2559         /* Get sam handle */
2560
2561         result = cm_connect_sam(contact_domain, state->mem_ctx, true, &cli,
2562                                 &dom_pol);
2563         if (!NT_STATUS_IS_OK(result)) {
2564                 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
2565                 goto done;
2566         }
2567
2568         b = cli->binding_handle;
2569
2570         result = rpccli_samr_chgpasswd_user3(cli, state->mem_ctx,
2571                                              user,
2572                                              newpass,
2573                                              oldpass,
2574                                              &info,
2575                                              &reject);
2576
2577         /* Windows 2003 returns NT_STATUS_PASSWORD_RESTRICTION */
2578
2579         if (NT_STATUS_EQUAL(result, NT_STATUS_PASSWORD_RESTRICTION) ) {
2580
2581                 fill_in_password_policy(state->response, info);
2582
2583                 state->response->data.auth.reject_reason =
2584                         reject->extendedFailureReason;
2585
2586                 got_info = true;
2587         }
2588
2589         /* atm the pidl generated rpccli_samr_ChangePasswordUser3 function will
2590          * return with NT_STATUS_BUFFER_TOO_SMALL for w2k dcs as w2k just
2591          * returns with 4byte error code (NT_STATUS_NOT_SUPPORTED) which is too
2592          * short to comply with the samr_ChangePasswordUser3 idl - gd */
2593
2594         /* only fallback when the chgpasswd_user3 call is not supported */
2595         if (NT_STATUS_EQUAL(result, NT_STATUS_RPC_PROCNUM_OUT_OF_RANGE) ||
2596             NT_STATUS_EQUAL(result, NT_STATUS_NOT_SUPPORTED) ||
2597             NT_STATUS_EQUAL(result, NT_STATUS_BUFFER_TOO_SMALL) ||
2598             NT_STATUS_EQUAL(result, NT_STATUS_NOT_IMPLEMENTED)) {
2599
2600                 DEBUG(10,("Password change with chgpasswd_user3 failed with: %s, retrying chgpasswd_user2\n",
2601                         nt_errstr(result)));
2602
2603                 result = rpccli_samr_chgpasswd_user2(cli, state->mem_ctx, user, newpass, oldpass);
2604
2605                 /* Windows 2000 returns NT_STATUS_ACCOUNT_RESTRICTION.
2606                    Map to the same status code as Windows 2003. */
2607
2608                 if ( NT_STATUS_EQUAL(NT_STATUS_ACCOUNT_RESTRICTION, result ) ) {
2609                         result = NT_STATUS_PASSWORD_RESTRICTION;
2610                 }
2611         }
2612
2613 done:
2614
2615         if (NT_STATUS_IS_OK(result)
2616             && (state->request->flags & WBFLAG_PAM_CACHED_LOGIN)
2617             && lp_winbind_offline_logon()) {
2618                 result = winbindd_update_creds_by_name(contact_domain, user,
2619                                                        newpass);
2620                 /* Again, this happens when we login from gdm or xdm
2621                  * and the password expires, *BUT* cached crendentials
2622                  * doesn't exist. winbindd_update_creds_by_name()
2623                  * returns NT_STATUS_NO_SUCH_USER.
2624                  * This is not a failure.
2625                  * --- BoYang
2626                  * */
2627                 if (NT_STATUS_EQUAL(result, NT_STATUS_NO_SUCH_USER)) {
2628                         result = NT_STATUS_OK;
2629                 }
2630
2631                 if (!NT_STATUS_IS_OK(result)) {
2632                         DEBUG(10, ("Failed to store creds: %s\n",
2633                                    nt_errstr(result)));
2634                         goto process_result;
2635                 }
2636         }
2637
2638         if (!NT_STATUS_IS_OK(result) && !got_info && contact_domain) {
2639
2640                 NTSTATUS policy_ret;
2641
2642                 policy_ret = fillup_password_policy(
2643                         contact_domain, state->response);
2644
2645                 /* failure of this is non critical, it will just provide no
2646                  * additional information to the client why the change has
2647                  * failed - Guenther */
2648
2649                 if (!NT_STATUS_IS_OK(policy_ret)) {
2650                         DEBUG(10,("Failed to get password policies: %s\n", nt_errstr(policy_ret)));
2651                         goto process_result;
2652                 }
2653         }
2654
2655 process_result:
2656
2657         if (strequal(contact_domain->name, get_global_sam_name())) {
2658                 /* FIXME: internal rpc pipe does not cache handles yet */
2659                 if (b) {
2660                         if (is_valid_policy_hnd(&dom_pol)) {
2661                                 NTSTATUS _result;
2662                                 dcerpc_samr_Close(b, state->mem_ctx, &dom_pol, &_result);
2663                         }
2664                         TALLOC_FREE(cli);
2665                 }
2666         }
2667
2668         set_auth_errors(state->response, result);
2669
2670         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
2671               ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
2672                domain,
2673                user,
2674                state->response->data.auth.nt_status_string,
2675                state->response->data.auth.pam_error));
2676
2677         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2678 }
2679
2680 enum winbindd_result winbindd_dual_pam_logoff(struct winbindd_domain *domain,
2681                                               struct winbindd_cli_state *state)
2682 {
2683         NTSTATUS result = NT_STATUS_NOT_SUPPORTED;
2684
2685         DEBUG(3, ("[%5lu]: pam dual logoff %s\n", (unsigned long)state->pid,
2686                 state->request->data.logoff.user));
2687
2688         if (!(state->request->flags & WBFLAG_PAM_KRB5)) {
2689                 result = NT_STATUS_OK;
2690                 goto process_result;
2691         }
2692
2693         if (state->request->data.logoff.krb5ccname[0] == '\0') {
2694                 result = NT_STATUS_OK;
2695                 goto process_result;
2696         }
2697
2698 #ifdef HAVE_KRB5
2699
2700         if (state->request->data.logoff.uid == (uid_t)-1) {
2701                 DEBUG(0,("winbindd_pam_logoff: invalid uid\n"));
2702                 goto process_result;
2703         }
2704
2705         /* what we need here is to find the corresponding krb5 ccache name *we*
2706          * created for a given username and destroy it */
2707
2708         if (!ccache_entry_exists(state->request->data.logoff.user)) {
2709                 result = NT_STATUS_OK;
2710                 DEBUG(10,("winbindd_pam_logoff: no entry found.\n"));
2711                 goto process_result;
2712         }
2713
2714         if (!ccache_entry_identical(state->request->data.logoff.user,
2715                                         state->request->data.logoff.uid,
2716                                         state->request->data.logoff.krb5ccname)) {
2717                 DEBUG(0,("winbindd_pam_logoff: cached entry differs.\n"));
2718                 goto process_result;
2719         }
2720
2721         result = remove_ccache(state->request->data.logoff.user);
2722         if (!NT_STATUS_IS_OK(result)) {
2723                 DEBUG(0,("winbindd_pam_logoff: failed to remove ccache: %s\n",
2724                         nt_errstr(result)));
2725                 goto process_result;
2726         }
2727
2728         /*
2729          * Remove any mlock'ed memory creds in the child
2730          * we might be using for krb5 ticket renewal.
2731          */
2732
2733         winbindd_delete_memory_creds(state->request->data.logoff.user);
2734
2735 #else
2736         result = NT_STATUS_NOT_SUPPORTED;
2737 #endif
2738
2739 process_result:
2740
2741
2742         set_auth_errors(state->response, result);
2743
2744         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2745 }
2746
2747 /* Change user password with auth crap*/
2748
2749 enum winbindd_result winbindd_dual_pam_chng_pswd_auth_crap(struct winbindd_domain *domainSt, struct winbindd_cli_state *state)
2750 {
2751         NTSTATUS result;
2752         DATA_BLOB new_nt_password;
2753         DATA_BLOB old_nt_hash_enc;
2754         DATA_BLOB new_lm_password;
2755         DATA_BLOB old_lm_hash_enc;
2756         fstring  namespace, domain, user;
2757         struct policy_handle dom_pol;
2758         struct winbindd_domain *contact_domain = domainSt;
2759         struct rpc_pipe_client *cli = NULL;
2760         struct dcerpc_binding_handle *b = NULL;
2761
2762         ZERO_STRUCT(dom_pol);
2763
2764         /* Ensure null termination */
2765         state->request->data.chng_pswd_auth_crap.user[
2766                 sizeof(state->request->data.chng_pswd_auth_crap.user)-1]=0;
2767         state->request->data.chng_pswd_auth_crap.domain[
2768                 sizeof(state->request->data.chng_pswd_auth_crap.domain)-1]=0;
2769         domain[0] = '\0';
2770         namespace[0] = '\0';
2771         user[0] = '\0';
2772
2773         DEBUG(3, ("[%5lu]: pam change pswd auth crap domain: %s user: %s\n",
2774                   (unsigned long)state->pid,
2775                   state->request->data.chng_pswd_auth_crap.domain,
2776                   state->request->data.chng_pswd_auth_crap.user));
2777
2778         if (lp_winbind_offline_logon()) {
2779                 DEBUG(0,("Refusing password change as winbind offline logons are enabled. "));
2780                 DEBUGADD(0,("Changing passwords here would risk inconsistent logons\n"));
2781                 result = NT_STATUS_ACCESS_DENIED;
2782                 goto done;
2783         }
2784
2785         if (*state->request->data.chng_pswd_auth_crap.domain) {
2786                 fstrcpy(domain,state->request->data.chng_pswd_auth_crap.domain);
2787         } else {
2788                 bool ok;
2789
2790                 ok = parse_domain_user(state->request->data.chng_pswd_auth_crap.user,
2791                                        namespace,
2792                                        domain,
2793                                        user);
2794                 if (!ok) {
2795                         result = NT_STATUS_INVALID_PARAMETER;
2796                         goto done;
2797                 }
2798
2799                 if(!*domain) {
2800                         DEBUG(3,("no domain specified with username (%s) - "
2801                                  "failing auth\n",
2802                                  state->request->data.chng_pswd_auth_crap.user));
2803                         result = NT_STATUS_NO_SUCH_USER;
2804                         goto done;
2805                 }
2806         }
2807
2808         if (!*domain && lp_winbind_use_default_domain()) {
2809                 fstrcpy(domain,lp_workgroup());
2810         }
2811
2812         if(!*user) {
2813                 fstrcpy(user, state->request->data.chng_pswd_auth_crap.user);
2814         }
2815
2816         DEBUG(3, ("[%5lu]: pam auth crap domain: %s user: %s\n",
2817                   (unsigned long)state->pid, domain, user));
2818
2819         /* Change password */
2820         new_nt_password = data_blob_const(
2821                 state->request->data.chng_pswd_auth_crap.new_nt_pswd,
2822                 state->request->data.chng_pswd_auth_crap.new_nt_pswd_len);
2823
2824         old_nt_hash_enc = data_blob_const(
2825                 state->request->data.chng_pswd_auth_crap.old_nt_hash_enc,
2826                 state->request->data.chng_pswd_auth_crap.old_nt_hash_enc_len);
2827
2828         if(state->request->data.chng_pswd_auth_crap.new_lm_pswd_len > 0)        {
2829                 new_lm_password = data_blob_const(
2830                         state->request->data.chng_pswd_auth_crap.new_lm_pswd,
2831                         state->request->data.chng_pswd_auth_crap.new_lm_pswd_len);
2832
2833                 old_lm_hash_enc = data_blob_const(
2834                         state->request->data.chng_pswd_auth_crap.old_lm_hash_enc,
2835                         state->request->data.chng_pswd_auth_crap.old_lm_hash_enc_len);
2836         } else {
2837                 new_lm_password = data_blob_null;
2838                 old_lm_hash_enc = data_blob_null;
2839         }
2840
2841         /* Get sam handle */
2842
2843         result = cm_connect_sam(contact_domain, state->mem_ctx, true, &cli, &dom_pol);
2844         if (!NT_STATUS_IS_OK(result)) {
2845                 DEBUG(1, ("could not get SAM handle on DC for %s\n", domain));
2846                 goto done;
2847         }
2848
2849         b = cli->binding_handle;
2850
2851         result = rpccli_samr_chng_pswd_auth_crap(
2852                 cli, state->mem_ctx, user, new_nt_password, old_nt_hash_enc,
2853                 new_lm_password, old_lm_hash_enc);
2854
2855  done:
2856
2857         if (strequal(contact_domain->name, get_global_sam_name())) {
2858                 /* FIXME: internal rpc pipe does not cache handles yet */
2859                 if (b) {
2860                         if (is_valid_policy_hnd(&dom_pol)) {
2861                                 NTSTATUS _result;
2862                                 dcerpc_samr_Close(b, state->mem_ctx, &dom_pol, &_result);
2863                         }
2864                         TALLOC_FREE(cli);
2865                 }
2866         }
2867
2868         set_auth_errors(state->response, result);
2869
2870         DEBUG(NT_STATUS_IS_OK(result) ? 5 : 2,
2871               ("Password change for user [%s]\\[%s] returned %s (PAM: %d)\n",
2872                domain, user,
2873                state->response->data.auth.nt_status_string,
2874                state->response->data.auth.pam_error));
2875
2876         return NT_STATUS_IS_OK(result) ? WINBINDD_OK : WINBINDD_ERROR;
2877 }
2878
2879 #ifdef HAVE_KRB5
2880 static NTSTATUS extract_pac_vrfy_sigs(TALLOC_CTX *mem_ctx, DATA_BLOB pac_blob,
2881                                       struct PAC_DATA **p_pac_data)
2882 {
2883         krb5_context krbctx = NULL;
2884         krb5_error_code k5ret;
2885         krb5_keytab keytab;
2886         krb5_kt_cursor cursor;
2887         krb5_keytab_entry entry;
2888         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
2889
2890         ZERO_STRUCT(entry);
2891         ZERO_STRUCT(cursor);
2892
2893         k5ret = krb5_init_context(&krbctx);
2894         if (k5ret) {
2895                 DEBUG(1, ("Failed to initialize kerberos context: %s\n",
2896                           error_message(k5ret)));
2897                 status = krb5_to_nt_status(k5ret);
2898                 goto out;
2899         }
2900
2901         k5ret =  gse_krb5_get_server_keytab(krbctx, &keytab);
2902         if (k5ret) {
2903                 DEBUG(1, ("Failed to get keytab: %s\n",
2904                           error_message(k5ret)));
2905                 status = krb5_to_nt_status(k5ret);
2906                 goto out_free;
2907         }
2908
2909         k5ret = krb5_kt_start_seq_get(krbctx, keytab, &cursor);
2910         if (k5ret) {
2911                 DEBUG(1, ("Failed to start seq: %s\n",
2912                           error_message(k5ret)));
2913                 status = krb5_to_nt_status(k5ret);
2914                 goto out_keytab;
2915         }
2916
2917         k5ret = krb5_kt_next_entry(krbctx, keytab, &entry, &cursor);
2918         while (k5ret == 0) {
2919                 status = kerberos_decode_pac(mem_ctx,
2920                                              pac_blob,
2921                                              krbctx,
2922                                              NULL, /* krbtgt_keyblock */
2923                                              KRB5_KT_KEY(&entry), /* service_keyblock */
2924                                              NULL, /* client_principal */
2925                                              0, /* tgs_authtime */
2926                                              p_pac_data);
2927                 if (NT_STATUS_IS_OK(status)) {
2928                         break;
2929                 }
2930                 k5ret = smb_krb5_kt_free_entry(krbctx, &entry);
2931                 k5ret = krb5_kt_next_entry(krbctx, keytab, &entry, &cursor);
2932         }
2933
2934         k5ret = krb5_kt_end_seq_get(krbctx, keytab, &cursor);
2935         if (k5ret) {
2936                 DEBUG(1, ("Failed to end seq: %s\n",
2937                           error_message(k5ret)));
2938         }
2939 out_keytab:
2940         k5ret = krb5_kt_close(krbctx, keytab);
2941         if (k5ret) {
2942                 DEBUG(1, ("Failed to close keytab: %s\n",
2943                           error_message(k5ret)));
2944         }
2945 out_free:
2946         krb5_free_context(krbctx);
2947 out:
2948         return status;
2949 }
2950
2951 NTSTATUS winbindd_pam_auth_pac_verify(struct winbindd_cli_state *state,
2952                                       bool *p_is_trusted,
2953                                       uint16_t *p_validation_level,
2954                                       union netr_Validation **p_validation)
2955 {
2956         struct winbindd_request *req = state->request;
2957         DATA_BLOB pac_blob;
2958         struct PAC_DATA *pac_data = NULL;
2959         struct PAC_LOGON_INFO *logon_info = NULL;
2960         struct PAC_UPN_DNS_INFO *upn_dns_info = NULL;
2961         struct netr_SamInfo6 *info6 = NULL;
2962         uint16_t validation_level = 0;
2963         union netr_Validation *validation = NULL;
2964         struct netr_SamInfo3 *info3_copy = NULL;
2965         NTSTATUS result;
2966         bool is_trusted = false;
2967         uint32_t i;
2968
2969         *p_is_trusted = false;
2970         *p_validation_level = 0;
2971         *p_validation = NULL;
2972
2973         pac_blob = data_blob_const(req->extra_data.data, req->extra_len);
2974         result = extract_pac_vrfy_sigs(state->mem_ctx, pac_blob, &pac_data);
2975         if (NT_STATUS_IS_OK(result)) {
2976                 is_trusted = true;
2977         }
2978         if (NT_STATUS_EQUAL(result, NT_STATUS_ACCESS_DENIED)) {
2979                 /* Try without signature verification */
2980                 result = kerberos_decode_pac(state->mem_ctx,
2981                                              pac_blob,
2982                                              NULL, /* krb5_context */
2983                                              NULL, /* krbtgt_keyblock */
2984                                              NULL, /* service_keyblock */
2985                                              NULL, /* client_principal */
2986                                              0, /* tgs_authtime */
2987                                              &pac_data);
2988         }
2989         if (!NT_STATUS_IS_OK(result)) {
2990                 DEBUG(1, ("Error during PAC signature verification: %s\n",
2991                           nt_errstr(result)));
2992                 return result;
2993         }
2994
2995         for (i=0; i < pac_data->num_buffers; i++) {
2996                 if (pac_data->buffers[i].type == PAC_TYPE_LOGON_INFO) {
2997                         logon_info = pac_data->buffers[i].info->logon_info.info;
2998                         continue;
2999                 }
3000                 if (pac_data->buffers[i].type == PAC_TYPE_UPN_DNS_INFO) {
3001                         upn_dns_info = &pac_data->buffers[i].info->upn_dns_info;
3002                         continue;
3003                 }
3004         }
3005
3006         result = create_info6_from_pac(state->mem_ctx,
3007                                        logon_info,
3008                                        upn_dns_info,
3009                                        &info6);
3010         if (!NT_STATUS_IS_OK(result)) {
3011                 return result;
3012         }
3013
3014         result = map_info6_to_validation(state->mem_ctx,
3015                                          info6,
3016                                          &validation_level,
3017                                          &validation);
3018         if (!NT_STATUS_IS_OK(result)) {
3019                 return result;
3020         }
3021
3022         result = map_validation_to_info3(state->mem_ctx,
3023                                          validation_level,
3024                                          validation,
3025                                          &info3_copy);
3026         if (!NT_STATUS_IS_OK(result)) {
3027                 return result;
3028         }
3029
3030         if (is_trusted) {
3031                 /*
3032                  * Signature verification succeeded, we can
3033                  * trust the PAC and prime the netsamlogon
3034                  * and name2sid caches. DO NOT DO THIS
3035                  * in the signature verification failed
3036                  * code path.
3037                  */
3038                 struct winbindd_domain *domain = NULL;
3039
3040                 netsamlogon_cache_store(NULL, info3_copy);
3041
3042                 /*
3043                  * We're in the parent here, so find the child
3044                  * pointer from the PAC domain name.
3045                  */
3046                 domain = find_lookup_domain_from_name(
3047                                 info3_copy->base.logon_domain.string);
3048                 if (domain && domain->primary ) {
3049                         struct dom_sid user_sid;
3050
3051                         sid_compose(&user_sid,
3052                                 info3_copy->base.domain_sid,
3053                                 info3_copy->base.rid);
3054
3055                         cache_name2sid_trusted(domain,
3056                                 info3_copy->base.logon_domain.string,
3057                                 info3_copy->base.account_name.string,
3058                                 SID_NAME_USER,
3059                                 &user_sid);
3060
3061                         DBG_INFO("PAC for user %s\\%s SID %s primed cache\n",
3062                                 info3_copy->base.logon_domain.string,
3063                                 info3_copy->base.account_name.string,
3064                                 sid_string_dbg(&user_sid));
3065                 }
3066         }
3067
3068         *p_is_trusted = is_trusted;
3069         *p_validation_level = validation_level;
3070         *p_validation = validation;
3071         return NT_STATUS_OK;
3072 }
3073 #else /* HAVE_KRB5 */
3074 NTSTATUS winbindd_pam_auth_pac_verify(struct winbindd_cli_state *state,
3075                                       bool *p_is_trusted,
3076                                       uint16_t *p_validation_level,
3077                                       union netr_Validation **p_validation);
3078 {
3079
3080         *p_is_trusted = false;
3081         *p_validation_level = 0;
3082         *p_validation = NULL;
3083         return NT_STATUS_NO_SUCH_USER;
3084 }
3085 #endif /* HAVE_KRB5 */