source4/dsdb/common/util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4
   5    Copyright (C) Andrew Tridgell 2004
   6    Copyright (C) Volker Lendecke 2004
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006
   8    Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "events/events.h"
  26 #include "ldb.h"
  27 #include "ldb_errors.h"
  28 #include "../lib/util/util_ldb.h"
  29 #include "../lib/crypto/crypto.h"
  30 #include "dsdb/samdb/samdb.h"
  31 #include "libcli/security/security.h"
  32 #include "librpc/gen_ndr/ndr_security.h"
  33 #include "librpc/gen_ndr/ndr_misc.h"
  34 #include "../libds/common/flags.h"
  35 #include "dsdb/common/proto.h"
  36 #include "libcli/ldap/ldap_ndr.h"
  37 #include "param/param.h"
  38 #include "libcli/auth/libcli_auth.h"
  39 #include "librpc/gen_ndr/ndr_drsblobs.h"
  40
  41 /*
  42   search the sam for the specified attributes in a specific domain, filter on
  43   objectSid being in domain_sid.
  44 */
  45 int samdb_search_domain(struct ldb_context *sam_ldb,
  46                         TALLOC_CTX *mem_ctx,
  47                         struct ldb_dn *basedn,
  48                         struct ldb_message ***res,
  49                         const char * const *attrs,
  50                         const struct dom_sid *domain_sid,
  51                         const char *format, ...)  _PRINTF_ATTRIBUTE(7,8)
  52 {
  53         va_list ap;
  54         int i, count;
  55
  56         va_start(ap, format);
  57         count = gendb_search_v(sam_ldb, mem_ctx, basedn,
  58                                res, attrs, format, ap);
  59         va_end(ap);
  60
  61         i=0;
  62
  63         while (i<count) {
  64                 struct dom_sid *entry_sid;
  65
  66                 entry_sid = samdb_result_dom_sid(mem_ctx, (*res)[i], "objectSid");
  67
  68                 if ((entry_sid == NULL) ||
  69                     (!dom_sid_in_domain(domain_sid, entry_sid))) {
  70                         /* Delete that entry from the result set */
  71                         (*res)[i] = (*res)[count-1];
  72                         count -= 1;
  73                         talloc_free(entry_sid);
  74                         continue;
  75                 }
  76                 talloc_free(entry_sid);
  77                 i += 1;
  78         }
  79
  80         return count;
  81 }
  82
  83 /*
  84   search the sam for a single string attribute in exactly 1 record
  85 */
  86 const char *samdb_search_string_v(struct ldb_context *sam_ldb,
  87                                   TALLOC_CTX *mem_ctx,
  88                                   struct ldb_dn *basedn,
  89                                   const char *attr_name,
  90                                   const char *format, va_list ap) _PRINTF_ATTRIBUTE(5,0)
  91 {
  92         int count;
  93         const char *attrs[2] = { NULL, NULL };
  94         struct ldb_message **res = NULL;
  95
  96         attrs[0] = attr_name;
  97
  98         count = gendb_search_v(sam_ldb, mem_ctx, basedn, &res, attrs, format, ap);
  99         if (count > 1) {
 100                 DEBUG(1,("samdb: search for %s %s not single valued (count=%d)\n",
 101                          attr_name, format, count));
 102         }
 103         if (count != 1) {
 104                 talloc_free(res);
 105                 return NULL;
 106         }
 107
 108         return samdb_result_string(res[0], attr_name, NULL);
 109 }
 110
 111 /*
 112   search the sam for a single string attribute in exactly 1 record
 113 */
 114 const char *samdb_search_string(struct ldb_context *sam_ldb,
 115                                 TALLOC_CTX *mem_ctx,
 116                                 struct ldb_dn *basedn,
 117                                 const char *attr_name,
 118                                 const char *format, ...) _PRINTF_ATTRIBUTE(5,6)
 119 {
 120         va_list ap;
 121         const char *str;
 122
 123         va_start(ap, format);
 124         str = samdb_search_string_v(sam_ldb, mem_ctx, basedn, attr_name, format, ap);
 125         va_end(ap);
 126
 127         return str;
 128 }
 129
 130 struct ldb_dn *samdb_search_dn(struct ldb_context *sam_ldb,
 131                                TALLOC_CTX *mem_ctx,
 132                                struct ldb_dn *basedn,
 133                                const char *format, ...) _PRINTF_ATTRIBUTE(4,5)
 134 {
 135         va_list ap;
 136         struct ldb_dn *ret;
 137         struct ldb_message **res = NULL;
 138         int count;
 139
 140         va_start(ap, format);
 141         count = gendb_search_v(sam_ldb, mem_ctx, basedn, &res, NULL, format, ap);
 142         va_end(ap);
 143
 144         if (count != 1) return NULL;
 145
 146         ret = talloc_steal(mem_ctx, res[0]->dn);
 147         talloc_free(res);
 148
 149         return ret;
 150 }
 151
 152 /*
 153   search the sam for a dom_sid attribute in exactly 1 record
 154 */
 155 struct dom_sid *samdb_search_dom_sid(struct ldb_context *sam_ldb,
 156                                      TALLOC_CTX *mem_ctx,
 157                                      struct ldb_dn *basedn,
 158                                      const char *attr_name,
 159                                      const char *format, ...) _PRINTF_ATTRIBUTE(5,6)
 160 {
 161         va_list ap;
 162         int count;
 163         struct ldb_message **res;
 164         const char *attrs[2] = { NULL, NULL };
 165         struct dom_sid *sid;
 166
 167         attrs[0] = attr_name;
 168
 169         va_start(ap, format);
 170         count = gendb_search_v(sam_ldb, mem_ctx, basedn, &res, attrs, format, ap);
 171         va_end(ap);
 172         if (count > 1) {
 173                 DEBUG(1,("samdb: search for %s %s not single valued (count=%d)\n",
 174                          attr_name, format, count));
 175         }
 176         if (count != 1) {
 177                 talloc_free(res);
 178                 return NULL;
 179         }
 180         sid = samdb_result_dom_sid(mem_ctx, res[0], attr_name);
 181         talloc_free(res);
 182         return sid;
 183 }
 184
 185 /*
 186   return the count of the number of records in the sam matching the query
 187 */
 188 int samdb_search_count(struct ldb_context *sam_ldb,
 189                        TALLOC_CTX *mem_ctx,
 190                        struct ldb_dn *basedn,
 191                        const char *format, ...) _PRINTF_ATTRIBUTE(4,5)
 192 {
 193         va_list ap;
 194         struct ldb_message **res;
 195         const char * const attrs[] = { NULL };
 196         int ret;
 197
 198         va_start(ap, format);
 199         ret = gendb_search_v(sam_ldb, mem_ctx, basedn, &res, attrs, format, ap);
 200         va_end(ap);
 201
 202         return ret;
 203 }
 204
 205
 206 /*
 207   search the sam for a single integer attribute in exactly 1 record
 208 */
 209 uint_t samdb_search_uint(struct ldb_context *sam_ldb,
 210                          TALLOC_CTX *mem_ctx,
 211                          uint_t default_value,
 212                          struct ldb_dn *basedn,
 213                          const char *attr_name,
 214                          const char *format, ...) _PRINTF_ATTRIBUTE(6,7)
 215 {
 216         va_list ap;
 217         int count;
 218         struct ldb_message **res;
 219         const char *attrs[2] = { NULL, NULL };
 220
 221         attrs[0] = attr_name;
 222
 223         va_start(ap, format);
 224         count = gendb_search_v(sam_ldb, mem_ctx, basedn, &res, attrs, format, ap);
 225         va_end(ap);
 226
 227         if (count != 1) {
 228                 return default_value;
 229         }
 230
 231         return samdb_result_uint(res[0], attr_name, default_value);
 232 }
 233
 234 /*
 235   search the sam for a single signed 64 bit integer attribute in exactly 1 record
 236 */
 237 int64_t samdb_search_int64(struct ldb_context *sam_ldb,
 238                            TALLOC_CTX *mem_ctx,
 239                            int64_t default_value,
 240                            struct ldb_dn *basedn,
 241                            const char *attr_name,
 242                            const char *format, ...) _PRINTF_ATTRIBUTE(6,7)
 243 {
 244         va_list ap;
 245         int count;
 246         struct ldb_message **res;
 247         const char *attrs[2] = { NULL, NULL };
 248
 249         attrs[0] = attr_name;
 250
 251         va_start(ap, format);
 252         count = gendb_search_v(sam_ldb, mem_ctx, basedn, &res, attrs, format, ap);
 253         va_end(ap);
 254
 255         if (count != 1) {
 256                 return default_value;
 257         }
 258
 259         return samdb_result_int64(res[0], attr_name, default_value);
 260 }
 261
 262 /*
 263   search the sam for multipe records each giving a single string attribute
 264   return the number of matches, or -1 on error
 265 */
 266 int samdb_search_string_multiple(struct ldb_context *sam_ldb,
 267                                  TALLOC_CTX *mem_ctx,
 268                                  struct ldb_dn *basedn,
 269                                  const char ***strs,
 270                                  const char *attr_name,
 271                                  const char *format, ...) _PRINTF_ATTRIBUTE(6,7)
 272 {
 273         va_list ap;
 274         int count, i;
 275         const char *attrs[2] = { NULL, NULL };
 276         struct ldb_message **res = NULL;
 277
 278         attrs[0] = attr_name;
 279
 280         va_start(ap, format);
 281         count = gendb_search_v(sam_ldb, mem_ctx, basedn, &res, attrs, format, ap);
 282         va_end(ap);
 283
 284         if (count <= 0) {
 285                 return count;
 286         }
 287
 288         /* make sure its single valued */
 289         for (i=0;i<count;i++) {
 290                 if (res[i]->num_elements != 1) {
 291                         DEBUG(1,("samdb: search for %s %s not single valued\n",
 292                                  attr_name, format));
 293                         talloc_free(res);
 294                         return -1;
 295                 }
 296         }
 297
 298         *strs = talloc_array(mem_ctx, const char *, count+1);
 299         if (! *strs) {
 300                 talloc_free(res);
 301                 return -1;
 302         }
 303
 304         for (i=0;i<count;i++) {
 305                 (*strs)[i] = samdb_result_string(res[i], attr_name, NULL);
 306         }
 307         (*strs)[count] = NULL;
 308
 309         return count;
 310 }
 311
 312 /*
 313   pull a uint from a result set.
 314 */
 315 uint_t samdb_result_uint(const struct ldb_message *msg, const char *attr, uint_t default_value)
 316 {
 317         return ldb_msg_find_attr_as_uint(msg, attr, default_value);
 318 }
 319
 320 /*
 321   pull a (signed) int64 from a result set.
 322 */
 323 int64_t samdb_result_int64(const struct ldb_message *msg, const char *attr, int64_t default_value)
 324 {
 325         return ldb_msg_find_attr_as_int64(msg, attr, default_value);
 326 }
 327
 328 /*
 329   pull a string from a result set.
 330 */
 331 const char *samdb_result_string(const struct ldb_message *msg, const char *attr,
 332                                 const char *default_value)
 333 {
 334         return ldb_msg_find_attr_as_string(msg, attr, default_value);
 335 }
 336
 337 struct ldb_dn *samdb_result_dn(struct ldb_context *ldb, TALLOC_CTX *mem_ctx, const struct ldb_message *msg,
 338                                const char *attr, struct ldb_dn *default_value)
 339 {
 340         struct ldb_dn *ret_dn = ldb_msg_find_attr_as_dn(ldb, mem_ctx, msg, attr);
 341         if (!ret_dn) {
 342                 return default_value;
 343         }
 344         return ret_dn;
 345 }
 346
 347 /*
 348   pull a rid from a objectSid in a result set.
 349 */
 350 uint32_t samdb_result_rid_from_sid(TALLOC_CTX *mem_ctx, const struct ldb_message *msg,
 351                                    const char *attr, uint32_t default_value)
 352 {
 353         struct dom_sid *sid;
 354         uint32_t rid;
 355
 356         sid = samdb_result_dom_sid(mem_ctx, msg, attr);
 357         if (sid == NULL) {
 358                 return default_value;
 359         }
 360         rid = sid->sub_auths[sid->num_auths-1];
 361         talloc_free(sid);
 362         return rid;
 363 }
 364
 365 /*
 366   pull a dom_sid structure from a objectSid in a result set.
 367 */
 368 struct dom_sid *samdb_result_dom_sid(TALLOC_CTX *mem_ctx, const struct ldb_message *msg,
 369                                      const char *attr)
 370 {
 371         const struct ldb_val *v;
 372         struct dom_sid *sid;
 373         enum ndr_err_code ndr_err;
 374         v = ldb_msg_find_ldb_val(msg, attr);
 375         if (v == NULL) {
 376                 return NULL;
 377         }
 378         sid = talloc(mem_ctx, struct dom_sid);
 379         if (sid == NULL) {
 380                 return NULL;
 381         }
 382         ndr_err = ndr_pull_struct_blob(v, sid, NULL, sid,
 383                                        (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
 384         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 385                 talloc_free(sid);
 386                 return NULL;
 387         }
 388         return sid;
 389 }
 390
 391 /*
 392   pull a guid structure from a objectGUID in a result set.
 393 */
 394 struct GUID samdb_result_guid(const struct ldb_message *msg, const char *attr)
 395 {
 396         const struct ldb_val *v;
 397         enum ndr_err_code ndr_err;
 398         struct GUID guid;
 399         TALLOC_CTX *mem_ctx;
 400
 401         ZERO_STRUCT(guid);
 402
 403         v = ldb_msg_find_ldb_val(msg, attr);
 404         if (!v) return guid;
 405
 406         mem_ctx = talloc_named_const(NULL, 0, "samdb_result_guid");
 407         if (!mem_ctx) return guid;
 408         ndr_err = ndr_pull_struct_blob(v, mem_ctx, NULL, &guid,
 409                                        (ndr_pull_flags_fn_t)ndr_pull_GUID);
 410         talloc_free(mem_ctx);
 411         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 412                 return guid;
 413         }
 414
 415         return guid;
 416 }
 417
 418 /*
 419   pull a sid prefix from a objectSid in a result set.
 420   this is used to find the domain sid for a user
 421 */
 422 struct dom_sid *samdb_result_sid_prefix(TALLOC_CTX *mem_ctx, const struct ldb_message *msg,
 423                                         const char *attr)
 424 {
 425         struct dom_sid *sid = samdb_result_dom_sid(mem_ctx, msg, attr);
 426         if (!sid || sid->num_auths < 1) return NULL;
 427         sid->num_auths--;
 428         return sid;
 429 }
 430
 431 /*
 432   pull a NTTIME in a result set.
 433 */
 434 NTTIME samdb_result_nttime(struct ldb_message *msg, const char *attr, NTTIME default_value)
 435 {
 436         return ldb_msg_find_attr_as_uint64(msg, attr, default_value);
 437 }
 438
 439 /*
 440  * Windows stores 0 for lastLogoff.
 441  * But when a MS DC return the lastLogoff (as Logoff Time)
 442  * it returns 0x7FFFFFFFFFFFFFFF, not returning this value in this case
 443  * cause windows 2008 and newer version to fail for SMB requests
 444  */
 445 NTTIME samdb_result_last_logoff(struct ldb_message *msg)
 446 {
 447         NTTIME ret = ldb_msg_find_attr_as_uint64(msg, "lastLogoff",0);
 448
 449         if (ret == 0)
 450                 ret = 0x7FFFFFFFFFFFFFFFULL;
 451
 452         return ret;
 453 }
 454
 455 /*
 456  * Windows uses both 0 and 9223372036854775807 (0x7FFFFFFFFFFFFFFFULL) to
 457  * indicate an account doesn't expire.
 458  *
 459  * When Windows initially creates an account, it sets
 460  * accountExpires = 9223372036854775807 (0x7FFFFFFFFFFFFFFF).  However,
 461  * when changing from an account having a specific expiration date to
 462  * that account never expiring, it sets accountExpires = 0.
 463  *
 464  * Consolidate that logic here to allow clearer logic for account expiry in
 465  * the rest of the code.
 466  */
 467 NTTIME samdb_result_account_expires(struct ldb_message *msg)
 468 {
 469         NTTIME ret = ldb_msg_find_attr_as_uint64(msg, "accountExpires",
 470                                                  0);
 471
 472         if (ret == 0)
 473                 ret = 0x7FFFFFFFFFFFFFFFULL;
 474
 475         return ret;
 476 }
 477
 478 /*
 479   pull a uint64_t from a result set.
 480 */
 481 uint64_t samdb_result_uint64(struct ldb_message *msg, const char *attr, uint64_t default_value)
 482 {
 483         return ldb_msg_find_attr_as_uint64(msg, attr, default_value);
 484 }
 485
 486
 487 /*
 488   construct the allow_password_change field from the PwdLastSet attribute and the
 489   domain password settings
 490 */
 491 NTTIME samdb_result_allow_password_change(struct ldb_context *sam_ldb,
 492                                           TALLOC_CTX *mem_ctx,
 493                                           struct ldb_dn *domain_dn,
 494                                           struct ldb_message *msg,
 495                                           const char *attr)
 496 {
 497         uint64_t attr_time = samdb_result_uint64(msg, attr, 0);
 498         int64_t minPwdAge;
 499
 500         if (attr_time == 0) {
 501                 return 0;
 502         }
 503
 504         minPwdAge = samdb_search_int64(sam_ldb, mem_ctx, 0, domain_dn, "minPwdAge", NULL);
 505
 506         /* yes, this is a -= not a += as minPwdAge is stored as the negative
 507            of the number of 100-nano-seconds */
 508         attr_time -= minPwdAge;
 509
 510         return attr_time;
 511 }
 512
 513 /*
 514   construct the force_password_change field from the PwdLastSet
 515   attribute, the userAccountControl and the domain password settings
 516 */
 517 NTTIME samdb_result_force_password_change(struct ldb_context *sam_ldb,
 518                                           TALLOC_CTX *mem_ctx,
 519                                           struct ldb_dn *domain_dn,
 520                                           struct ldb_message *msg)
 521 {
 522         uint64_t attr_time = samdb_result_uint64(msg, "pwdLastSet", 0);
 523         uint32_t userAccountControl = samdb_result_uint64(msg, "userAccountControl", 0);
 524         int64_t maxPwdAge;
 525
 526         /* Machine accounts don't expire, and there is a flag for 'no expiry' */
 527         if (!(userAccountControl & UF_NORMAL_ACCOUNT)
 528             || (userAccountControl & UF_DONT_EXPIRE_PASSWD)) {
 529                 return 0x7FFFFFFFFFFFFFFFULL;
 530         }
 531
 532         if (attr_time == 0) {
 533                 return 0;
 534         }
 535
 536         maxPwdAge = samdb_search_int64(sam_ldb, mem_ctx, 0, domain_dn, "maxPwdAge", NULL);
 537         if (maxPwdAge == 0) {
 538                 return 0x7FFFFFFFFFFFFFFFULL;
 539         } else {
 540                 attr_time -= maxPwdAge;
 541         }
 542
 543         return attr_time;
 544 }
 545
 546 /*
 547   pull a samr_Password structutre from a result set.
 548 */
 549 struct samr_Password *samdb_result_hash(TALLOC_CTX *mem_ctx, const struct ldb_message *msg, const char *attr)
 550 {
 551         struct samr_Password *hash = NULL;
 552         const struct ldb_val *val = ldb_msg_find_ldb_val(msg, attr);
 553         if (val && (val->length >= sizeof(hash->hash))) {
 554                 hash = talloc(mem_ctx, struct samr_Password);
 555                 memcpy(hash->hash, val->data, MIN(val->length, sizeof(hash->hash)));
 556         }
 557         return hash;
 558 }
 559
 560 /*
 561   pull an array of samr_Password structutres from a result set.
 562 */
 563 uint_t samdb_result_hashes(TALLOC_CTX *mem_ctx, const struct ldb_message *msg,
 564                            const char *attr, struct samr_Password **hashes)
 565 {
 566         uint_t count = 0;
 567         const struct ldb_val *val = ldb_msg_find_ldb_val(msg, attr);
 568         int i;
 569
 570         *hashes = NULL;
 571         if (!val) {
 572                 return 0;
 573         }
 574         count = val->length / 16;
 575         if (count == 0) {
 576                 return 0;
 577         }
 578
 579         *hashes = talloc_array(mem_ctx, struct samr_Password, count);
 580         if (! *hashes) {
 581                 return 0;
 582         }
 583
 584         for (i=0;i<count;i++) {
 585                 memcpy((*hashes)[i].hash, (i*16)+(char *)val->data, 16);
 586         }
 587
 588         return count;
 589 }
 590
 591 NTSTATUS samdb_result_passwords(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx, struct ldb_message *msg,
 592                                 struct samr_Password **lm_pwd, struct samr_Password **nt_pwd)
 593 {
 594         struct samr_Password *lmPwdHash, *ntPwdHash;
 595         if (nt_pwd) {
 596                 int num_nt;
 597                 num_nt = samdb_result_hashes(mem_ctx, msg, "unicodePwd", &ntPwdHash);
 598                 if (num_nt == 0) {
 599                         *nt_pwd = NULL;
 600                 } else if (num_nt > 1) {
 601                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
 602                 } else {
 603                         *nt_pwd = &ntPwdHash[0];
 604                 }
 605         }
 606         if (lm_pwd) {
 607                 /* Ensure that if we have turned off LM
 608                  * authentication, that we never use the LM hash, even
 609                  * if we store it */
 610                 if (lp_lanman_auth(lp_ctx)) {
 611                         int num_lm;
 612                         num_lm = samdb_result_hashes(mem_ctx, msg, "dBCSPwd", &lmPwdHash);
 613                         if (num_lm == 0) {
 614                                 *lm_pwd = NULL;
 615                         } else if (num_lm > 1) {
 616                                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 617                         } else {
 618                                 *lm_pwd = &lmPwdHash[0];
 619                         }
 620                 } else {
 621                         *lm_pwd = NULL;
 622                 }
 623         }
 624         return NT_STATUS_OK;
 625 }
 626
 627 /*
 628   pull a samr_LogonHours structutre from a result set.
 629 */
 630 struct samr_LogonHours samdb_result_logon_hours(TALLOC_CTX *mem_ctx, struct ldb_message *msg, const char *attr)
 631 {
 632         struct samr_LogonHours hours;
 633         const int units_per_week = 168;
 634         const struct ldb_val *val = ldb_msg_find_ldb_val(msg, attr);
 635         ZERO_STRUCT(hours);
 636         hours.bits = talloc_array(mem_ctx, uint8_t, units_per_week);
 637         if (!hours.bits) {
 638                 return hours;
 639         }
 640         hours.units_per_week = units_per_week;
 641         memset(hours.bits, 0xFF, units_per_week);
 642         if (val) {
 643                 memcpy(hours.bits, val->data, MIN(val->length, units_per_week));
 644         }
 645         return hours;
 646 }
 647
 648 /*
 649   pull a set of account_flags from a result set.
 650
 651   This requires that the attributes:
 652    pwdLastSet
 653    userAccountControl
 654   be included in 'msg'
 655 */
 656 uint32_t samdb_result_acct_flags(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
 657                                  struct ldb_message *msg, struct ldb_dn *domain_dn)
 658 {
 659         uint32_t userAccountControl = ldb_msg_find_attr_as_uint(msg, "userAccountControl", 0);
 660         uint32_t acct_flags = ds_uf2acb(userAccountControl);
 661         NTTIME must_change_time;
 662         NTTIME now;
 663
 664         must_change_time = samdb_result_force_password_change(sam_ctx, mem_ctx,
 665                                                               domain_dn, msg);
 666
 667         /* Test account expire time */
 668         unix_to_nt_time(&now, time(NULL));
 669         /* check for expired password */
 670         if (must_change_time < now) {
 671                 acct_flags |= ACB_PW_EXPIRED;
 672         }
 673         return acct_flags;
 674 }
 675
 676 struct lsa_BinaryString samdb_result_parameters(TALLOC_CTX *mem_ctx,
 677                                                 struct ldb_message *msg,
 678                                                 const char *attr)
 679 {
 680         struct lsa_BinaryString s;
 681         const struct ldb_val *val = ldb_msg_find_ldb_val(msg, attr);
 682
 683         ZERO_STRUCT(s);
 684
 685         if (!val) {
 686                 return s;
 687         }
 688
 689         s.array = talloc_array(mem_ctx, uint16_t, val->length/2);
 690         if (!s.array) {
 691                 return s;
 692         }
 693         s.length = s.size = val->length/2;
 694         memcpy(s.array, val->data, val->length);
 695
 696         return s;
 697 }
 698
 699 /* Find an attribute, with a particular value */
 700
 701 /* The current callers of this function expect a very specific
 702  * behaviour: In particular, objectClass subclass equivilance is not
 703  * wanted.  This means that we should not lookup the schema for the
 704  * comparison function */
 705 struct ldb_message_element *samdb_find_attribute(struct ldb_context *ldb,
 706                                                  const struct ldb_message *msg,
 707                                                  const char *name, const char *value)
 708 {
 709         int i;
 710         struct ldb_message_element *el = ldb_msg_find_element(msg, name);
 711
 712         if (!el) {
 713                 return NULL;
 714         }
 715
 716         for (i=0;i<el->num_values;i++) {
 717                 if (ldb_attr_cmp(value, (char *)el->values[i].data) == 0) {
 718                         return el;
 719                 }
 720         }
 721
 722         return NULL;
 723 }
 724
 725 int samdb_find_or_add_value(struct ldb_context *ldb, struct ldb_message *msg, const char *name, const char *set_value)
 726 {
 727         if (samdb_find_attribute(ldb, msg, name, set_value) == NULL) {
 728                 return samdb_msg_add_string(ldb, msg, msg, name, set_value);
 729         }
 730         return LDB_SUCCESS;
 731 }
 732
 733 int samdb_find_or_add_attribute(struct ldb_context *ldb, struct ldb_message *msg, const char *name, const char *set_value)
 734 {
 735         struct ldb_message_element *el;
 736
 737         el = ldb_msg_find_element(msg, name);
 738         if (el) {
 739                 return LDB_SUCCESS;
 740         }
 741
 742         return samdb_msg_add_string(ldb, msg, msg, name, set_value);
 743 }
 744
 745
 746
 747 /*
 748   add a string element to a message
 749 */
 750 int samdb_msg_add_string(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 751                          const char *attr_name, const char *str)
 752 {
 753         char *s = talloc_strdup(mem_ctx, str);
 754         char *a = talloc_strdup(mem_ctx, attr_name);
 755         if (s == NULL || a == NULL) {
 756                 return LDB_ERR_OPERATIONS_ERROR;
 757         }
 758         return ldb_msg_add_string(msg, a, s);
 759 }
 760
 761 /*
 762   add a dom_sid element to a message
 763 */
 764 int samdb_msg_add_dom_sid(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 765                          const char *attr_name, struct dom_sid *sid)
 766 {
 767         struct ldb_val v;
 768         enum ndr_err_code ndr_err;
 769
 770         ndr_err = ndr_push_struct_blob(&v, mem_ctx,
 771                                        lp_iconv_convenience(ldb_get_opaque(sam_ldb, "loadparm")),
 772                                        sid,
 773                                        (ndr_push_flags_fn_t)ndr_push_dom_sid);
 774         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 775                 return -1;
 776         }
 777         return ldb_msg_add_value(msg, attr_name, &v, NULL);
 778 }
 779
 780
 781 /*
 782   add a delete element operation to a message
 783 */
 784 int samdb_msg_add_delete(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 785                          const char *attr_name)
 786 {
 787         /* we use an empty replace rather than a delete, as it allows for
 788            samdb_replace() to be used everywhere */
 789         return ldb_msg_add_empty(msg, attr_name, LDB_FLAG_MOD_REPLACE, NULL);
 790 }
 791
 792 /*
 793   add a add attribute value to a message
 794 */
 795 int samdb_msg_add_addval(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 796                          const char *attr_name, const char *value)
 797 {
 798         struct ldb_message_element *el;
 799         char *a, *v;
 800         int ret;
 801         a = talloc_strdup(mem_ctx, attr_name);
 802         if (a == NULL)
 803                 return -1;
 804         v = talloc_strdup(mem_ctx, value);
 805         if (v == NULL)
 806                 return -1;
 807         ret = ldb_msg_add_string(msg, a, v);
 808         if (ret != 0)
 809                 return ret;
 810         el = ldb_msg_find_element(msg, a);
 811         if (el == NULL)
 812                 return -1;
 813         el->flags = LDB_FLAG_MOD_ADD;
 814         return 0;
 815 }
 816
 817 /*
 818   add a delete attribute value to a message
 819 */
 820 int samdb_msg_add_delval(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 821                          const char *attr_name, const char *value)
 822 {
 823         struct ldb_message_element *el;
 824         char *a, *v;
 825         int ret;
 826         a = talloc_strdup(mem_ctx, attr_name);
 827         if (a == NULL)
 828                 return -1;
 829         v = talloc_strdup(mem_ctx, value);
 830         if (v == NULL)
 831                 return -1;
 832         ret = ldb_msg_add_string(msg, a, v);
 833         if (ret != 0)
 834                 return ret;
 835         el = ldb_msg_find_element(msg, a);
 836         if (el == NULL)
 837                 return -1;
 838         el->flags = LDB_FLAG_MOD_DELETE;
 839         return 0;
 840 }
 841
 842 /*
 843   add a int element to a message
 844 */
 845 int samdb_msg_add_int(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 846                        const char *attr_name, int v)
 847 {
 848         const char *s = talloc_asprintf(mem_ctx, "%d", v);
 849         return samdb_msg_add_string(sam_ldb, mem_ctx, msg, attr_name, s);
 850 }
 851
 852 /*
 853   add a uint_t element to a message
 854 */
 855 int samdb_msg_add_uint(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 856                        const char *attr_name, uint_t v)
 857 {
 858         const char *s = talloc_asprintf(mem_ctx, "%u", v);
 859         return samdb_msg_add_string(sam_ldb, mem_ctx, msg, attr_name, s);
 860 }
 861
 862 /*
 863   add a (signed) int64_t element to a message
 864 */
 865 int samdb_msg_add_int64(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 866                         const char *attr_name, int64_t v)
 867 {
 868         const char *s = talloc_asprintf(mem_ctx, "%lld", (long long)v);
 869         return samdb_msg_add_string(sam_ldb, mem_ctx, msg, attr_name, s);
 870 }
 871
 872 /*
 873   add a uint64_t element to a message
 874 */
 875 int samdb_msg_add_uint64(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 876                         const char *attr_name, uint64_t v)
 877 {
 878         const char *s = talloc_asprintf(mem_ctx, "%llu", (unsigned long long)v);
 879         return samdb_msg_add_string(sam_ldb, mem_ctx, msg, attr_name, s);
 880 }
 881
 882 /*
 883   add a samr_Password element to a message
 884 */
 885 int samdb_msg_add_hash(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 886                        const char *attr_name, struct samr_Password *hash)
 887 {
 888         struct ldb_val val;
 889         val.data = talloc_memdup(mem_ctx, hash->hash, 16);
 890         if (!val.data) {
 891                 return -1;
 892         }
 893         val.length = 16;
 894         return ldb_msg_add_value(msg, attr_name, &val, NULL);
 895 }
 896
 897 /*
 898   add a samr_Password array to a message
 899 */
 900 int samdb_msg_add_hashes(TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 901                          const char *attr_name, struct samr_Password *hashes, uint_t count)
 902 {
 903         struct ldb_val val;
 904         int i;
 905         val.data = talloc_array_size(mem_ctx, 16, count);
 906         val.length = count*16;
 907         if (!val.data) {
 908                 return -1;
 909         }
 910         for (i=0;i<count;i++) {
 911                 memcpy(i*16 + (char *)val.data, hashes[i].hash, 16);
 912         }
 913         return ldb_msg_add_value(msg, attr_name, &val, NULL);
 914 }
 915
 916 /*
 917   add a acct_flags element to a message
 918 */
 919 int samdb_msg_add_acct_flags(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 920                              const char *attr_name, uint32_t v)
 921 {
 922         return samdb_msg_add_uint(sam_ldb, mem_ctx, msg, attr_name, ds_acb2uf(v));
 923 }
 924
 925 /*
 926   add a logon_hours element to a message
 927 */
 928 int samdb_msg_add_logon_hours(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 929                               const char *attr_name, struct samr_LogonHours *hours)
 930 {
 931         struct ldb_val val;
 932         val.length = hours->units_per_week / 8;
 933         val.data = hours->bits;
 934         return ldb_msg_add_value(msg, attr_name, &val, NULL);
 935 }
 936
 937 /*
 938   add a parameters element to a message
 939 */
 940 int samdb_msg_add_parameters(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 941                              const char *attr_name, struct lsa_BinaryString *parameters)
 942 {
 943         struct ldb_val val;
 944         val.length = parameters->length * 2;
 945         val.data = (uint8_t *)parameters->array;
 946         return ldb_msg_add_value(msg, attr_name, &val, NULL);
 947 }
 948 /*
 949   add a general value element to a message
 950 */
 951 int samdb_msg_add_value(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 952                               const char *attr_name, const struct ldb_val *val)
 953 {
 954         return ldb_msg_add_value(msg, attr_name, val, NULL);
 955 }
 956
 957 /*
 958   sets a general value element to a message
 959 */
 960 int samdb_msg_set_value(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 961                         const char *attr_name, const struct ldb_val *val)
 962 {
 963         struct ldb_message_element *el;
 964
 965         el = ldb_msg_find_element(msg, attr_name);
 966         if (el) {
 967                 el->num_values = 0;
 968         }
 969         return ldb_msg_add_value(msg, attr_name, val, NULL);
 970 }
 971
 972 /*
 973   set a string element in a message
 974 */
 975 int samdb_msg_set_string(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg,
 976                          const char *attr_name, const char *str)
 977 {
 978         struct ldb_message_element *el;
 979
 980         el = ldb_msg_find_element(msg, attr_name);
 981         if (el) {
 982                 el->num_values = 0;
 983         }
 984         return samdb_msg_add_string(sam_ldb, mem_ctx, msg, attr_name, str);
 985 }
 986
 987 /*
 988   replace elements in a record
 989 */
 990 int samdb_replace(struct ldb_context *sam_ldb, TALLOC_CTX *mem_ctx, struct ldb_message *msg)
 991 {
 992         int i;
 993
 994         /* mark all the message elements as LDB_FLAG_MOD_REPLACE */
 995         for (i=0;i<msg->num_elements;i++) {
 996                 msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
 997         }
 998
 999         /* modify the samdb record */
1000         return ldb_modify(sam_ldb, msg);
1001 }
1002
1003 /*
1004   return a default security descriptor
1005 */
1006 struct security_descriptor *samdb_default_security_descriptor(TALLOC_CTX *mem_ctx)
1007 {
1008         struct security_descriptor *sd;
1009
1010         sd = security_descriptor_initialise(mem_ctx);
1011
1012         return sd;
1013 }
1014
1015 struct ldb_dn *samdb_base_dn(struct ldb_context *sam_ctx)
1016 {
1017         return ldb_get_default_basedn(sam_ctx);
1018 }
1019
1020 struct ldb_dn *samdb_config_dn(struct ldb_context *sam_ctx)
1021 {
1022         return ldb_get_config_basedn(sam_ctx);
1023 }
1024
1025 struct ldb_dn *samdb_schema_dn(struct ldb_context *sam_ctx)
1026 {
1027         return ldb_get_schema_basedn(sam_ctx);
1028 }
1029
1030 struct ldb_dn *samdb_root_dn(struct ldb_context *sam_ctx)
1031 {
1032         return ldb_get_root_basedn(sam_ctx);
1033 }
1034
1035 struct ldb_dn *samdb_partitions_dn(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx)
1036 {
1037         struct ldb_dn *new_dn;
1038
1039         new_dn = ldb_dn_copy(mem_ctx, samdb_config_dn(sam_ctx));
1040         if ( ! ldb_dn_add_child_fmt(new_dn, "CN=Partitions")) {
1041                 talloc_free(new_dn);
1042                 return NULL;
1043         }
1044         return new_dn;
1045 }
1046
1047 struct ldb_dn *samdb_sites_dn(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx)
1048 {
1049         struct ldb_dn *new_dn;
1050
1051         new_dn = ldb_dn_copy(mem_ctx, samdb_config_dn(sam_ctx));
1052         if ( ! ldb_dn_add_child_fmt(new_dn, "CN=Sites")) {
1053                 talloc_free(new_dn);
1054                 return NULL;
1055         }
1056         return new_dn;
1057 }
1058
1059 /*
1060   work out the domain sid for the current open ldb
1061 */
1062 const struct dom_sid *samdb_domain_sid(struct ldb_context *ldb)
1063 {
1064         TALLOC_CTX *tmp_ctx;
1065         const struct dom_sid *domain_sid;
1066         const char *attrs[] = {
1067                 "objectSid",
1068                 NULL
1069         };
1070         struct ldb_result *res;
1071         int ret;
1072
1073         /* see if we have a cached copy */
1074         domain_sid = (struct dom_sid *)ldb_get_opaque(ldb, "cache.domain_sid");
1075         if (domain_sid) {
1076                 return domain_sid;
1077         }
1078
1079         tmp_ctx = talloc_new(ldb);
1080         if (tmp_ctx == NULL) {
1081                 goto failed;
1082         }
1083
1084         ret = ldb_search(ldb, tmp_ctx, &res, ldb_get_default_basedn(ldb), LDB_SCOPE_BASE, attrs, "objectSid=*");
1085
1086         if (ret != LDB_SUCCESS) {
1087                 goto failed;
1088         }
1089
1090         if (res->count != 1) {
1091                 goto failed;
1092         }
1093
1094         domain_sid = samdb_result_dom_sid(tmp_ctx, res->msgs[0], "objectSid");
1095         if (domain_sid == NULL) {
1096                 goto failed;
1097         }
1098
1099         /* cache the domain_sid in the ldb */
1100         if (ldb_set_opaque(ldb, "cache.domain_sid", discard_const_p(struct dom_sid, domain_sid)) != LDB_SUCCESS) {
1101                 goto failed;
1102         }
1103
1104         talloc_steal(ldb, domain_sid);
1105         talloc_free(tmp_ctx);
1106
1107         return domain_sid;
1108
1109 failed:
1110         DEBUG(1,("Failed to find domain_sid for open ldb\n"));
1111         talloc_free(tmp_ctx);
1112         return NULL;
1113 }
1114
1115 bool samdb_set_domain_sid(struct ldb_context *ldb, const struct dom_sid *dom_sid_in)
1116 {
1117         TALLOC_CTX *tmp_ctx;
1118         struct dom_sid *dom_sid_new;
1119         struct dom_sid *dom_sid_old;
1120
1121         /* see if we have a cached copy */
1122         dom_sid_old = talloc_get_type(ldb_get_opaque(ldb,
1123                                                      "cache.domain_sid"), struct dom_sid);
1124
1125         tmp_ctx = talloc_new(ldb);
1126         if (tmp_ctx == NULL) {
1127                 goto failed;
1128         }
1129
1130         dom_sid_new = dom_sid_dup(tmp_ctx, dom_sid_in);
1131         if (!dom_sid_new) {
1132                 goto failed;
1133         }
1134
1135         /* cache the domain_sid in the ldb */
1136         if (ldb_set_opaque(ldb, "cache.domain_sid", dom_sid_new) != LDB_SUCCESS) {
1137                 goto failed;
1138         }
1139
1140         talloc_steal(ldb, dom_sid_new);
1141         talloc_free(tmp_ctx);
1142         talloc_free(dom_sid_old);
1143
1144         return true;
1145
1146 failed:
1147         DEBUG(1,("Failed to set our own cached domain SID in the ldb!\n"));
1148         talloc_free(tmp_ctx);
1149         return false;
1150 }
1151
1152 /* Obtain the short name of the flexible single master operator
1153  * (FSMO), such as the PDC Emulator */
1154 const char *samdb_result_fsmo_name(struct ldb_context *ldb, TALLOC_CTX *mem_ctx, const struct ldb_message *msg,
1155                              const char *attr)
1156 {
1157         /* Format is cn=NTDS Settings,cn=<NETBIOS name of FSMO>,.... */
1158         struct ldb_dn *fsmo_dn = ldb_msg_find_attr_as_dn(ldb, mem_ctx, msg, attr);
1159         const struct ldb_val *val = ldb_dn_get_component_val(fsmo_dn, 1);
1160         const char *name = ldb_dn_get_component_name(fsmo_dn, 1);
1161
1162         if (!name || (ldb_attr_cmp(name, "cn") != 0)) {
1163                 /* Ensure this matches the format.  This gives us a
1164                  * bit more confidence that a 'cn' value will be a
1165                  * ascii string */
1166                 return NULL;
1167         }
1168         if (val) {
1169                 return (char *)val->data;
1170         }
1171         return NULL;
1172 }
1173
1174 /*
1175   work out the ntds settings dn for the current open ldb
1176 */
1177 struct ldb_dn *samdb_ntds_settings_dn(struct ldb_context *ldb)
1178 {
1179         TALLOC_CTX *tmp_ctx;
1180         const char *root_attrs[] = { "dsServiceName", NULL };
1181         int ret;
1182         struct ldb_result *root_res;
1183         struct ldb_dn *settings_dn;
1184
1185         /* see if we have a cached copy */
1186         settings_dn = (struct ldb_dn *)ldb_get_opaque(ldb, "cache.settings_dn");
1187         if (settings_dn) {
1188                 return settings_dn;
1189         }
1190
1191         tmp_ctx = talloc_new(ldb);
1192         if (tmp_ctx == NULL) {
1193                 goto failed;
1194         }
1195
1196         ret = ldb_search(ldb, tmp_ctx, &root_res, ldb_dn_new(tmp_ctx, ldb, ""), LDB_SCOPE_BASE, root_attrs, NULL);
1197         if (ret) {
1198                 DEBUG(1,("Searching for dsServiceName in rootDSE failed: %s\n",
1199                          ldb_errstring(ldb)));
1200                 goto failed;
1201         }
1202
1203         if (root_res->count != 1) {
1204                 goto failed;
1205         }
1206
1207         settings_dn = ldb_msg_find_attr_as_dn(ldb, tmp_ctx, root_res->msgs[0], "dsServiceName");
1208
1209         /* cache the domain_sid in the ldb */
1210         if (ldb_set_opaque(ldb, "cache.settings_dn", settings_dn) != LDB_SUCCESS) {
1211                 goto failed;
1212         }
1213
1214         talloc_steal(ldb, settings_dn);
1215         talloc_free(tmp_ctx);
1216
1217         return settings_dn;
1218
1219 failed:
1220         DEBUG(1,("Failed to find our own NTDS Settings DN in the ldb!\n"));
1221         talloc_free(tmp_ctx);
1222         return NULL;
1223 }
1224
1225 /*
1226   work out the ntds settings invocationId for the current open ldb
1227 */
1228 const struct GUID *samdb_ntds_invocation_id(struct ldb_context *ldb)
1229 {
1230         TALLOC_CTX *tmp_ctx;
1231         const char *attrs[] = { "invocationId", NULL };
1232         int ret;
1233         struct ldb_result *res;
1234         struct GUID *invocation_id;
1235
1236         /* see if we have a cached copy */
1237         invocation_id = (struct GUID *)ldb_get_opaque(ldb, "cache.invocation_id");
1238         if (invocation_id) {
1239                 return invocation_id;
1240         }
1241
1242         tmp_ctx = talloc_new(ldb);
1243         if (tmp_ctx == NULL) {
1244                 goto failed;
1245         }
1246
1247         ret = ldb_search(ldb, tmp_ctx, &res, samdb_ntds_settings_dn(ldb), LDB_SCOPE_BASE, attrs, NULL);
1248         if (ret) {
1249                 goto failed;
1250         }
1251
1252         if (res->count != 1) {
1253                 goto failed;
1254         }
1255
1256         invocation_id = talloc(tmp_ctx, struct GUID);
1257         if (!invocation_id) {
1258                 goto failed;
1259         }
1260
1261         *invocation_id = samdb_result_guid(res->msgs[0], "invocationId");
1262
1263         /* cache the domain_sid in the ldb */
1264         if (ldb_set_opaque(ldb, "cache.invocation_id", invocation_id) != LDB_SUCCESS) {
1265                 goto failed;
1266         }
1267
1268         talloc_steal(ldb, invocation_id);
1269         talloc_free(tmp_ctx);
1270
1271         return invocation_id;
1272
1273 failed:
1274         DEBUG(1,("Failed to find our own NTDS Settings invocationId in the ldb!\n"));
1275         talloc_free(tmp_ctx);
1276         return NULL;
1277 }
1278
1279 bool samdb_set_ntds_invocation_id(struct ldb_context *ldb, const struct GUID *invocation_id_in)
1280 {
1281         TALLOC_CTX *tmp_ctx;
1282         struct GUID *invocation_id_new;
1283         struct GUID *invocation_id_old;
1284
1285         /* see if we have a cached copy */
1286         invocation_id_old = (struct GUID *)ldb_get_opaque(ldb,
1287                                                          "cache.invocation_id");
1288
1289         tmp_ctx = talloc_new(ldb);
1290         if (tmp_ctx == NULL) {
1291                 goto failed;
1292         }
1293
1294         invocation_id_new = talloc(tmp_ctx, struct GUID);
1295         if (!invocation_id_new) {
1296                 goto failed;
1297         }
1298
1299         *invocation_id_new = *invocation_id_in;
1300
1301         /* cache the domain_sid in the ldb */
1302         if (ldb_set_opaque(ldb, "cache.invocation_id", invocation_id_new) != LDB_SUCCESS) {
1303                 goto failed;
1304         }
1305
1306         talloc_steal(ldb, invocation_id_new);
1307         talloc_free(tmp_ctx);
1308         talloc_free(invocation_id_old);
1309
1310         return true;
1311
1312 failed:
1313         DEBUG(1,("Failed to set our own cached invocationId in the ldb!\n"));
1314         talloc_free(tmp_ctx);
1315         return false;
1316 }
1317
1318 /*
1319   work out the ntds settings objectGUID for the current open ldb
1320 */
1321 const struct GUID *samdb_ntds_objectGUID(struct ldb_context *ldb)
1322 {
1323         TALLOC_CTX *tmp_ctx;
1324         const char *attrs[] = { "objectGUID", NULL };
1325         int ret;
1326         struct ldb_result *res;
1327         struct GUID *ntds_guid;
1328
1329         /* see if we have a cached copy */
1330         ntds_guid = (struct GUID *)ldb_get_opaque(ldb, "cache.ntds_guid");
1331         if (ntds_guid) {
1332                 return ntds_guid;
1333         }
1334
1335         tmp_ctx = talloc_new(ldb);
1336         if (tmp_ctx == NULL) {
1337                 goto failed;
1338         }
1339
1340         ret = ldb_search(ldb, tmp_ctx, &res, samdb_ntds_settings_dn(ldb), LDB_SCOPE_BASE, attrs, NULL);
1341         if (ret) {
1342                 goto failed;
1343         }
1344
1345         if (res->count != 1) {
1346                 goto failed;
1347         }
1348
1349         ntds_guid = talloc(tmp_ctx, struct GUID);
1350         if (!ntds_guid) {
1351                 goto failed;
1352         }
1353
1354         *ntds_guid = samdb_result_guid(res->msgs[0], "objectGUID");
1355
1356         /* cache the domain_sid in the ldb */
1357         if (ldb_set_opaque(ldb, "cache.ntds_guid", ntds_guid) != LDB_SUCCESS) {
1358                 goto failed;
1359         }
1360
1361         talloc_steal(ldb, ntds_guid);
1362         talloc_free(tmp_ctx);
1363
1364         return ntds_guid;
1365
1366 failed:
1367         DEBUG(1,("Failed to find our own NTDS Settings objectGUID in the ldb!\n"));
1368         talloc_free(tmp_ctx);
1369         return NULL;
1370 }
1371
1372 bool samdb_set_ntds_objectGUID(struct ldb_context *ldb, const struct GUID *ntds_guid_in)
1373 {
1374         TALLOC_CTX *tmp_ctx;
1375         struct GUID *ntds_guid_new;
1376         struct GUID *ntds_guid_old;
1377
1378         /* see if we have a cached copy */
1379         ntds_guid_old = (struct GUID *)ldb_get_opaque(ldb, "cache.ntds_guid");
1380
1381         tmp_ctx = talloc_new(ldb);
1382         if (tmp_ctx == NULL) {
1383                 goto failed;
1384         }
1385
1386         ntds_guid_new = talloc(tmp_ctx, struct GUID);
1387         if (!ntds_guid_new) {
1388                 goto failed;
1389         }
1390
1391         *ntds_guid_new = *ntds_guid_in;
1392
1393         /* cache the domain_sid in the ldb */
1394         if (ldb_set_opaque(ldb, "cache.ntds_guid", ntds_guid_new) != LDB_SUCCESS) {
1395                 goto failed;
1396         }
1397
1398         talloc_steal(ldb, ntds_guid_new);
1399         talloc_free(tmp_ctx);
1400         talloc_free(ntds_guid_old);
1401
1402         return true;
1403
1404 failed:
1405         DEBUG(1,("Failed to set our own cached invocationId in the ldb!\n"));
1406         talloc_free(tmp_ctx);
1407         return false;
1408 }
1409
1410 /*
1411   work out the server dn for the current open ldb
1412 */
1413 struct ldb_dn *samdb_server_dn(struct ldb_context *ldb, TALLOC_CTX *mem_ctx)
1414 {
1415         return ldb_dn_get_parent(mem_ctx, samdb_ntds_settings_dn(ldb));
1416 }
1417
1418 /*
1419   work out the server dn for the current open ldb
1420 */
1421 struct ldb_dn *samdb_server_site_dn(struct ldb_context *ldb, TALLOC_CTX *mem_ctx)
1422 {
1423         struct ldb_dn *server_dn;
1424         struct ldb_dn *server_site_dn;
1425
1426         server_dn = samdb_server_dn(ldb, mem_ctx);
1427         if (!server_dn) return NULL;
1428
1429         server_site_dn = ldb_dn_get_parent(mem_ctx, server_dn);
1430
1431         talloc_free(server_dn);
1432         return server_site_dn;
1433 }
1434
1435 /*
1436   work out if we are the PDC for the domain of the current open ldb
1437 */
1438 bool samdb_is_pdc(struct ldb_context *ldb)
1439 {
1440         const char *dom_attrs[] = { "fSMORoleOwner", NULL };
1441         int ret;
1442         struct ldb_result *dom_res;
1443         TALLOC_CTX *tmp_ctx;
1444         bool is_pdc;
1445         struct ldb_dn *pdc;
1446
1447         tmp_ctx = talloc_new(ldb);
1448         if (tmp_ctx == NULL) {
1449                 DEBUG(1, ("talloc_new failed in samdb_is_pdc"));
1450                 return false;
1451         }
1452
1453         ret = ldb_search(ldb, tmp_ctx, &dom_res, ldb_get_default_basedn(ldb), LDB_SCOPE_BASE, dom_attrs, NULL);
1454         if (ret) {
1455                 DEBUG(1,("Searching for fSMORoleOwner in %s failed: %s\n",
1456                          ldb_dn_get_linearized(ldb_get_default_basedn(ldb)),
1457                          ldb_errstring(ldb)));
1458                 goto failed;
1459         }
1460         if (dom_res->count != 1) {
1461                 goto failed;
1462         }
1463
1464         pdc = ldb_msg_find_attr_as_dn(ldb, tmp_ctx, dom_res->msgs[0], "fSMORoleOwner");
1465
1466         if (ldb_dn_compare(samdb_ntds_settings_dn(ldb), pdc) == 0) {
1467                 is_pdc = true;
1468         } else {
1469                 is_pdc = false;
1470         }
1471
1472         talloc_free(tmp_ctx);
1473
1474         return is_pdc;
1475
1476 failed:
1477         DEBUG(1,("Failed to find if we are the PDC for this ldb\n"));
1478         talloc_free(tmp_ctx);
1479         return false;
1480 }
1481
1482 /*
1483   work out if we are a Global Catalog server for the domain of the current open ldb
1484 */
1485 bool samdb_is_gc(struct ldb_context *ldb)
1486 {
1487         const char *attrs[] = { "options", NULL };
1488         int ret, options;
1489         struct ldb_result *res;
1490         TALLOC_CTX *tmp_ctx;
1491
1492         tmp_ctx = talloc_new(ldb);
1493         if (tmp_ctx == NULL) {
1494                 DEBUG(1, ("talloc_new failed in samdb_is_pdc"));
1495                 return false;
1496         }
1497
1498         /* Query cn=ntds settings,.... */
1499         ret = ldb_search(ldb, tmp_ctx, &res, samdb_ntds_settings_dn(ldb), LDB_SCOPE_BASE, attrs, NULL);
1500         if (ret) {
1501                 talloc_free(tmp_ctx);
1502                 return false;
1503         }
1504         if (res->count != 1) {
1505                 talloc_free(tmp_ctx);
1506                 return false;
1507         }
1508
1509         options = ldb_msg_find_attr_as_int(res->msgs[0], "options", 0);
1510         talloc_free(tmp_ctx);
1511
1512         /* if options attribute has the 0x00000001 flag set, then enable the global catlog */
1513         if (options & 0x000000001) {
1514                 return true;
1515         }
1516         return false;
1517 }
1518
1519 /* Find a domain object in the parents of a particular DN.  */
1520 int samdb_search_for_parent_domain(struct ldb_context *ldb, TALLOC_CTX *mem_ctx, struct ldb_dn *dn,
1521                                    struct ldb_dn **parent_dn, const char **errstring)
1522 {
1523         TALLOC_CTX *local_ctx;
1524         struct ldb_dn *sdn = dn;
1525         struct ldb_result *res = NULL;
1526         int ret = 0;
1527         const char *attrs[] = { NULL };
1528
1529         local_ctx = talloc_new(mem_ctx);
1530         if (local_ctx == NULL) return LDB_ERR_OPERATIONS_ERROR;
1531
1532         while ((sdn = ldb_dn_get_parent(local_ctx, sdn))) {
1533                 ret = ldb_search(ldb, local_ctx, &res, sdn, LDB_SCOPE_BASE, attrs,
1534                                  "(|(|(objectClass=domain)(objectClass=builtinDomain))(objectClass=samba4LocalDomain))");
1535                 if (ret == LDB_SUCCESS) {
1536                         if (res->count == 1) {
1537                                 break;
1538                         }
1539                 } else {
1540                         break;
1541                 }
1542         }
1543
1544         if (ret != LDB_SUCCESS) {
1545                 *errstring = talloc_asprintf(mem_ctx, "Error searching for parent domain of %s, failed searching for %s: %s",
1546                                              ldb_dn_get_linearized(dn),
1547                                              ldb_dn_get_linearized(sdn),
1548                                              ldb_errstring(ldb));
1549                 talloc_free(local_ctx);
1550                 return ret;
1551         }
1552         if (res->count != 1) {
1553                 *errstring = talloc_asprintf(mem_ctx, "Invalid dn (%s), not child of a domain object",
1554                                              ldb_dn_get_linearized(dn));
1555                 talloc_free(local_ctx);
1556                 return LDB_ERR_CONSTRAINT_VIOLATION;
1557         }
1558
1559         *parent_dn = talloc_steal(mem_ctx, res->msgs[0]->dn);
1560         talloc_free(local_ctx);
1561         return ret;
1562 }
1563
1564
1565 /*
1566   set the user password using plaintext, obeying any user or domain
1567   password restrictions
1568
1569   note that this function doesn't actually store the result in the
1570   database, it just fills in the "mod" structure with ldb modify
1571   elements to setup the correct change when samdb_replace() is
1572   called. This allows the caller to combine the change with other
1573   changes (as is needed by some of the set user info levels)
1574
1575   The caller should probably have a transaction wrapping this
1576 */
1577 NTSTATUS samdb_set_password(struct ldb_context *ctx, TALLOC_CTX *mem_ctx,
1578                             struct ldb_dn *user_dn,
1579                             struct ldb_dn *domain_dn,
1580                             struct ldb_message *mod,
1581                             const DATA_BLOB *new_password,
1582                             struct samr_Password *param_lmNewHash,
1583                             struct samr_Password *param_ntNewHash,
1584                             bool user_change,
1585                             enum samr_RejectReason *reject_reason,
1586                             struct samr_DomInfo1 **_dominfo)
1587 {
1588         const char * const user_attrs[] = { "userAccountControl", "lmPwdHistory",
1589                                             "ntPwdHistory",
1590                                             "dBCSPwd", "unicodePwd",
1591                                             "objectSid",
1592                                             "pwdLastSet", NULL };
1593         const char * const domain_attrs[] = { "pwdProperties", "pwdHistoryLength",
1594                                               "maxPwdAge", "minPwdAge",
1595                                               "minPwdLength", NULL };
1596         NTTIME pwdLastSet;
1597         int64_t minPwdAge;
1598         uint_t minPwdLength, pwdProperties, pwdHistoryLength;
1599         uint_t userAccountControl;
1600         struct samr_Password *sambaLMPwdHistory, *sambaNTPwdHistory,
1601                 *lmPwdHash, *ntPwdHash, *lmNewHash, *ntNewHash;
1602         struct samr_Password local_lmNewHash, local_ntNewHash;
1603         int sambaLMPwdHistory_len, sambaNTPwdHistory_len;
1604         struct dom_sid *domain_sid;
1605         struct ldb_message **res;
1606         bool restrictions;
1607         int count;
1608         time_t now = time(NULL);
1609         NTTIME now_nt;
1610         int i;
1611
1612         /* we need to know the time to compute password age */
1613         unix_to_nt_time(&now_nt, now);
1614
1615         /* pull all the user parameters */
1616         count = gendb_search_dn(ctx, mem_ctx, user_dn, &res, user_attrs);
1617         if (count != 1) {
1618                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
1619         }
1620         userAccountControl = samdb_result_uint(res[0],   "userAccountControl", 0);
1621         sambaLMPwdHistory_len =   samdb_result_hashes(mem_ctx, res[0],
1622                                                  "lmPwdHistory", &sambaLMPwdHistory);
1623         sambaNTPwdHistory_len =   samdb_result_hashes(mem_ctx, res[0],
1624                                                  "ntPwdHistory", &sambaNTPwdHistory);
1625         lmPwdHash =          samdb_result_hash(mem_ctx, res[0],   "dBCSPwd");
1626         ntPwdHash =          samdb_result_hash(mem_ctx, res[0],   "unicodePwd");
1627         pwdLastSet =         samdb_result_uint64(res[0], "pwdLastSet", 0);
1628
1629         /* Copy parameters */
1630         lmNewHash = param_lmNewHash;
1631         ntNewHash = param_ntNewHash;
1632
1633         /* Only non-trust accounts have restrictions (possibly this
1634          * test is the wrong way around, but I like to be restrictive
1635          * if possible */
1636         restrictions = !(userAccountControl & (UF_INTERDOMAIN_TRUST_ACCOUNT
1637                                                |UF_WORKSTATION_TRUST_ACCOUNT
1638                                                |UF_SERVER_TRUST_ACCOUNT));
1639
1640         if (domain_dn) {
1641                 /* pull the domain parameters */
1642                 count = gendb_search_dn(ctx, mem_ctx, domain_dn, &res, domain_attrs);
1643                 if (count != 1) {
1644                         DEBUG(2, ("samdb_set_password: Domain DN %s is invalid, for user %s\n",
1645                                   ldb_dn_get_linearized(domain_dn),
1646                                   ldb_dn_get_linearized(user_dn)));
1647                         return NT_STATUS_NO_SUCH_DOMAIN;
1648                 }
1649         } else {
1650                 /* work out the domain sid, and pull the domain from there */
1651                 domain_sid =         samdb_result_sid_prefix(mem_ctx, res[0], "objectSid");
1652                 if (domain_sid == NULL) {
1653                         return NT_STATUS_INTERNAL_DB_CORRUPTION;
1654                 }
1655
1656                 count = gendb_search(ctx, mem_ctx, NULL, &res, domain_attrs,
1657                                      "(objectSid=%s)",
1658                                      ldap_encode_ndr_dom_sid(mem_ctx, domain_sid));
1659                 if (count != 1) {
1660                         DEBUG(2, ("samdb_set_password: Could not find domain to match SID: %s, for user %s\n",
1661                                   dom_sid_string(mem_ctx, domain_sid),
1662                                   ldb_dn_get_linearized(user_dn)));
1663                         return NT_STATUS_NO_SUCH_DOMAIN;
1664                 }
1665         }
1666
1667         pwdProperties =    samdb_result_uint(res[0],   "pwdProperties", 0);
1668         pwdHistoryLength = samdb_result_uint(res[0],   "pwdHistoryLength", 0);
1669         minPwdLength =     samdb_result_uint(res[0],   "minPwdLength", 0);
1670         minPwdAge =        samdb_result_int64(res[0],  "minPwdAge", 0);
1671
1672         if (userAccountControl & UF_PASSWD_NOTREQD) {
1673                 /* see [MS-ADTS] 2.2.15 */
1674                 minPwdLength = 0;
1675         }
1676
1677         if (_dominfo) {
1678                 struct samr_DomInfo1 *dominfo;
1679                 /* on failure we need to fill in the reject reasons */
1680                 dominfo = talloc(mem_ctx, struct samr_DomInfo1);
1681                 if (dominfo == NULL) {
1682                         return NT_STATUS_NO_MEMORY;
1683                 }
1684                 dominfo->min_password_length     = minPwdLength;
1685                 dominfo->password_properties     = pwdProperties;
1686                 dominfo->password_history_length = pwdHistoryLength;
1687                 dominfo->max_password_age        = minPwdAge;
1688                 dominfo->min_password_age        = minPwdAge;
1689                 *_dominfo = dominfo;
1690         }
1691
1692         if (restrictions && new_password) {
1693                 char *new_pass;
1694
1695                 /* check the various password restrictions */
1696                 if (restrictions && minPwdLength > utf16_len_n(new_password->data, new_password->length) / 2) {
1697                         if (reject_reason) {
1698                                 *reject_reason = SAMR_REJECT_TOO_SHORT;
1699                         }
1700                         return NT_STATUS_PASSWORD_RESTRICTION;
1701                 }
1702
1703                 /* Create the NT hash */
1704                 mdfour(local_ntNewHash.hash, new_password->data, new_password->length);
1705
1706                 ntNewHash = &local_ntNewHash;
1707
1708                 /* Only check complexity if we can convert it at all.  Assuming unconvertable passwords are 'strong' */
1709                 if (convert_string_talloc_convenience(mem_ctx,
1710                           lp_iconv_convenience(ldb_get_opaque(ctx, "loadparm")),
1711                           CH_UTF16, CH_UNIX,
1712                           new_password->data, new_password->length,
1713                           (void **)&new_pass, NULL, false)) {
1714
1715                         /* possibly check password complexity */
1716                         if (restrictions && (pwdProperties & DOMAIN_PASSWORD_COMPLEX) &&
1717                             !check_password_quality(new_pass)) {
1718                                 if (reject_reason) {
1719                                         *reject_reason = SAMR_REJECT_COMPLEXITY;
1720                                 }
1721                                 return NT_STATUS_PASSWORD_RESTRICTION;
1722                         }
1723
1724                         /* compute the new lm hashes (for checking history - case insenitivly!) */
1725                         if (E_deshash(new_pass, local_lmNewHash.hash)) {
1726                                 lmNewHash = &local_lmNewHash;
1727                         }
1728                 }
1729         }
1730
1731         if (restrictions && user_change) {
1732                 /* are all password changes disallowed? */
1733                 if (pwdProperties & DOMAIN_REFUSE_PASSWORD_CHANGE) {
1734                         if (reject_reason) {
1735                                 *reject_reason = SAMR_REJECT_OTHER;
1736                         }
1737                         return NT_STATUS_PASSWORD_RESTRICTION;
1738                 }
1739
1740                 /* can this user change password? */
1741                 if (userAccountControl & UF_PASSWD_CANT_CHANGE) {
1742                         if (reject_reason) {
1743                                 *reject_reason = SAMR_REJECT_OTHER;
1744                         }
1745                         return NT_STATUS_PASSWORD_RESTRICTION;
1746                 }
1747
1748                 /* yes, this is a minus. The ages are in negative 100nsec units! */
1749                 if (pwdLastSet - minPwdAge > now_nt) {
1750                         if (reject_reason) {
1751                                 *reject_reason = SAMR_REJECT_OTHER;
1752                         }
1753                         return NT_STATUS_PASSWORD_RESTRICTION;
1754                 }
1755
1756                 /* check the immediately past password */
1757                 if (pwdHistoryLength > 0) {
1758                         if (lmNewHash && lmPwdHash && memcmp(lmNewHash->hash, lmPwdHash->hash, 16) == 0) {
1759                                 if (reject_reason) {
1760                                         *reject_reason = SAMR_REJECT_IN_HISTORY;
1761                                 }
1762                                 return NT_STATUS_PASSWORD_RESTRICTION;
1763                         }
1764                         if (ntNewHash && ntPwdHash && memcmp(ntNewHash->hash, ntPwdHash->hash, 16) == 0) {
1765                                 if (reject_reason) {
1766                                         *reject_reason = SAMR_REJECT_IN_HISTORY;
1767                                 }
1768                                 return NT_STATUS_PASSWORD_RESTRICTION;
1769                         }
1770                 }
1771
1772                 /* check the password history */
1773                 sambaLMPwdHistory_len = MIN(sambaLMPwdHistory_len, pwdHistoryLength);
1774                 sambaNTPwdHistory_len = MIN(sambaNTPwdHistory_len, pwdHistoryLength);
1775
1776                 for (i=0; lmNewHash && i<sambaLMPwdHistory_len;i++) {
1777                         if (memcmp(lmNewHash->hash, sambaLMPwdHistory[i].hash, 16) == 0) {
1778                                 if (reject_reason) {
1779                                         *reject_reason = SAMR_REJECT_IN_HISTORY;
1780                                 }
1781                                 return NT_STATUS_PASSWORD_RESTRICTION;
1782                         }
1783                 }
1784                 for (i=0; ntNewHash && i<sambaNTPwdHistory_len;i++) {
1785                         if (memcmp(ntNewHash->hash, sambaNTPwdHistory[i].hash, 16) == 0) {
1786                                 if (reject_reason) {
1787                                         *reject_reason = SAMR_REJECT_IN_HISTORY;
1788                                 }
1789                                 return NT_STATUS_PASSWORD_RESTRICTION;
1790                         }
1791                 }
1792         }
1793
1794 #define CHECK_RET(x) do { if (x != 0) return NT_STATUS_NO_MEMORY; } while(0)
1795
1796         /* the password is acceptable. Start forming the new fields */
1797         if (new_password) {
1798                 /* if we know the cleartext UTF16 password, then set it.
1799                  * Modules in ldb will set all the appropriate
1800                  * hashes */
1801                 CHECK_RET(ldb_msg_add_value(mod, "clearTextPassword", new_password, NULL));
1802         } else {
1803                 /* We don't have the cleartext, so delete the old one
1804                  * and set what we have of the hashes */
1805                 CHECK_RET(samdb_msg_add_delete(ctx, mem_ctx, mod, "clearTextPassword"));
1806
1807                 if (lmNewHash) {
1808                         CHECK_RET(samdb_msg_add_hash(ctx, mem_ctx, mod, "dBCSPwd", lmNewHash));
1809                 } else {
1810                         CHECK_RET(samdb_msg_add_delete(ctx, mem_ctx, mod, "dBCSPwd"));
1811                 }
1812
1813                 if (ntNewHash) {
1814                         CHECK_RET(samdb_msg_add_hash(ctx, mem_ctx, mod, "unicodePwd", ntNewHash));
1815                 } else {
1816                         CHECK_RET(samdb_msg_add_delete(ctx, mem_ctx, mod, "unicodePwd"));
1817                 }
1818         }
1819
1820         return NT_STATUS_OK;
1821 }
1822
1823
1824 /*
1825   set the user password using plaintext, obeying any user or domain
1826   password restrictions
1827
1828   This wrapper function takes a SID as input, rather than a user DN,
1829   and actually performs the password change
1830
1831 */
1832 NTSTATUS samdb_set_password_sid(struct ldb_context *ctx, TALLOC_CTX *mem_ctx,
1833                                 const struct dom_sid *user_sid,
1834                                 const DATA_BLOB *new_pass,
1835                                 struct samr_Password *lmNewHash,
1836                                 struct samr_Password *ntNewHash,
1837                                 bool user_change,
1838                                 enum samr_RejectReason *reject_reason,
1839                                 struct samr_DomInfo1 **_dominfo)
1840 {
1841         NTSTATUS nt_status;
1842         struct ldb_dn *user_dn;
1843         struct ldb_message *msg;
1844         int ret;
1845
1846         ret = ldb_transaction_start(ctx);
1847         if (ret) {
1848                 DEBUG(1, ("Failed to start transaction: %s\n", ldb_errstring(ctx)));
1849                 return NT_STATUS_TRANSACTION_ABORTED;
1850         }
1851
1852         user_dn = samdb_search_dn(ctx, mem_ctx, NULL,
1853                                   "(&(objectSid=%s)(objectClass=user))",
1854                                   ldap_encode_ndr_dom_sid(mem_ctx, user_sid));
1855         if (!user_dn) {
1856                 ldb_transaction_cancel(ctx);
1857                 DEBUG(3, ("samdb_set_password_sid: SID %s not found in samdb, returning NO_SUCH_USER\n",
1858                           dom_sid_string(mem_ctx, user_sid)));
1859                 return NT_STATUS_NO_SUCH_USER;
1860         }
1861
1862         msg = ldb_msg_new(mem_ctx);
1863         if (msg == NULL) {
1864                 ldb_transaction_cancel(ctx);
1865                 return NT_STATUS_NO_MEMORY;
1866         }
1867
1868         msg->dn = ldb_dn_copy(msg, user_dn);
1869         if (!msg->dn) {
1870                 ldb_transaction_cancel(ctx);
1871                 return NT_STATUS_NO_MEMORY;
1872         }
1873
1874         nt_status = samdb_set_password(ctx, mem_ctx,
1875                                        user_dn, NULL,
1876                                        msg, new_pass,
1877                                        lmNewHash, ntNewHash,
1878                                        user_change, /* This is a password set, not change */
1879                                        reject_reason, _dominfo);
1880         if (!NT_STATUS_IS_OK(nt_status)) {
1881                 ldb_transaction_cancel(ctx);
1882                 return nt_status;
1883         }
1884
1885         /* modify the samdb record */
1886         ret = samdb_replace(ctx, mem_ctx, msg);
1887         if (ret != 0) {
1888                 ldb_transaction_cancel(ctx);
1889                 return NT_STATUS_ACCESS_DENIED;
1890         }
1891
1892         ret = ldb_transaction_commit(ctx);
1893         if (ret != 0) {
1894                 DEBUG(0,("Failed to commit transaction to change password on %s: %s\n",
1895                          ldb_dn_get_linearized(msg->dn),
1896                          ldb_errstring(ctx)));
1897                 return NT_STATUS_TRANSACTION_ABORTED;
1898         }
1899         return NT_STATUS_OK;
1900 }
1901
1902
1903
1904 NTSTATUS samdb_create_foreign_security_principal(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx,
1905                                                  struct dom_sid *sid, struct ldb_dn **ret_dn)
1906 {
1907         struct ldb_message *msg;
1908         struct ldb_dn *basedn;
1909         const char *sidstr;
1910         int ret;
1911
1912         sidstr = dom_sid_string(mem_ctx, sid);
1913         NT_STATUS_HAVE_NO_MEMORY(sidstr);
1914
1915         /* We might have to create a ForeignSecurityPrincipal, even if this user
1916          * is in our own domain */
1917
1918         msg = ldb_msg_new(mem_ctx);
1919         if (msg == NULL) {
1920                 return NT_STATUS_NO_MEMORY;
1921         }
1922
1923         /* TODO: Hmmm. This feels wrong. How do I find the base dn to
1924          * put the ForeignSecurityPrincipals? d_state->domain_dn does
1925          * not work, this is wrong for the Builtin domain, there's no
1926          * cn=For...,cn=Builtin,dc={BASEDN}.  -- vl
1927          */
1928
1929         basedn = samdb_search_dn(sam_ctx, mem_ctx, NULL,
1930                                  "(&(objectClass=container)(cn=ForeignSecurityPrincipals))");
1931
1932         if (basedn == NULL) {
1933                 DEBUG(0, ("Failed to find DN for "
1934                           "ForeignSecurityPrincipal container\n"));
1935                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
1936         }
1937
1938         /* add core elements to the ldb_message for the alias */
1939         msg->dn = ldb_dn_copy(mem_ctx, basedn);
1940         if ( ! ldb_dn_add_child_fmt(msg->dn, "CN=%s", sidstr))
1941                 return NT_STATUS_NO_MEMORY;
1942
1943         samdb_msg_add_string(sam_ctx, mem_ctx, msg,
1944                              "objectClass",
1945                              "foreignSecurityPrincipal");
1946
1947         /* create the alias */
1948         ret = ldb_add(sam_ctx, msg);
1949         if (ret != 0) {
1950                 DEBUG(0,("Failed to create foreignSecurityPrincipal "
1951                          "record %s: %s\n",
1952                          ldb_dn_get_linearized(msg->dn),
1953                          ldb_errstring(sam_ctx)));
1954                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
1955         }
1956         *ret_dn = msg->dn;
1957         return NT_STATUS_OK;
1958 }
1959
1960
1961 /*
1962   Find the DN of a domain, assuming it to be a dotted.dns name
1963 */
1964
1965 struct ldb_dn *samdb_dns_domain_to_dn(struct ldb_context *ldb, TALLOC_CTX *mem_ctx, const char *dns_domain)
1966 {
1967         int i;
1968         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
1969         const char *binary_encoded;
1970         const char **split_realm;
1971         struct ldb_dn *dn;
1972
1973         if (!tmp_ctx) {
1974                 return NULL;
1975         }
1976
1977         split_realm = (const char **)str_list_make(tmp_ctx, dns_domain, ".");
1978         if (!split_realm) {
1979                 talloc_free(tmp_ctx);
1980                 return NULL;
1981         }
1982         dn = ldb_dn_new(mem_ctx, ldb, NULL);
1983         for (i=0; split_realm[i]; i++) {
1984                 binary_encoded = ldb_binary_encode_string(tmp_ctx, split_realm[i]);
1985                 if (!ldb_dn_add_base_fmt(dn, "dc=%s", binary_encoded)) {
1986                         DEBUG(2, ("Failed to add dc=%s element to DN %s\n",
1987                                   binary_encoded, ldb_dn_get_linearized(dn)));
1988                         talloc_free(tmp_ctx);
1989                         return NULL;
1990                 }
1991         }
1992         if (!ldb_dn_validate(dn)) {
1993                 DEBUG(2, ("Failed to validated DN %s\n",
1994                           ldb_dn_get_linearized(dn)));
1995                 return NULL;
1996         }
1997         return dn;
1998 }
1999 /*
2000   Find the DN of a domain, be it the netbios or DNS name
2001 */
2002
2003 struct ldb_dn *samdb_domain_to_dn(struct ldb_context *ldb, TALLOC_CTX *mem_ctx,
2004                                   const char *domain_name)
2005 {
2006         const char * const domain_ref_attrs[] = {
2007                 "ncName", NULL
2008         };
2009         const char * const domain_ref2_attrs[] = {
2010                 NULL
2011         };
2012         struct ldb_result *res_domain_ref;
2013         char *escaped_domain = ldb_binary_encode_string(mem_ctx, domain_name);
2014         /* find the domain's DN */
2015         int ret_domain = ldb_search(ldb, mem_ctx,
2016                                             &res_domain_ref,
2017                                             samdb_partitions_dn(ldb, mem_ctx),
2018                                             LDB_SCOPE_ONELEVEL,
2019                                             domain_ref_attrs,
2020                                             "(&(nETBIOSName=%s)(objectclass=crossRef))",
2021                                             escaped_domain);
2022         if (ret_domain != 0) {
2023                 return NULL;
2024         }
2025
2026         if (res_domain_ref->count == 0) {
2027                 ret_domain = ldb_search(ldb, mem_ctx,
2028                                                 &res_domain_ref,
2029                                                 samdb_dns_domain_to_dn(ldb, mem_ctx, domain_name),
2030                                                 LDB_SCOPE_BASE,
2031                                                 domain_ref2_attrs,
2032                                                 "(objectclass=domain)");
2033                 if (ret_domain != 0) {
2034                         return NULL;
2035                 }
2036
2037                 if (res_domain_ref->count == 1) {
2038                         return res_domain_ref->msgs[0]->dn;
2039                 }
2040                 return NULL;
2041         }
2042
2043         if (res_domain_ref->count > 1) {
2044                 DEBUG(0,("Found %d records matching domain [%s]\n",
2045                          ret_domain, domain_name));
2046                 return NULL;
2047         }
2048
2049         return samdb_result_dn(ldb, mem_ctx, res_domain_ref->msgs[0], "nCName", NULL);
2050
2051 }
2052
2053
2054 /*
2055   use a GUID to find a DN
2056  */
2057 int dsdb_find_dn_by_guid(struct ldb_context *ldb,
2058                          TALLOC_CTX *mem_ctx,
2059                          const char *guid_str, struct ldb_dn **dn)
2060 {
2061         int ret;
2062         struct ldb_result *res;
2063         const char *attrs[] = { NULL };
2064         struct ldb_request *search_req;
2065         char *expression;
2066         struct ldb_search_options_control *options;
2067
2068         expression = talloc_asprintf(mem_ctx, "objectGUID=%s", guid_str);
2069         if (!expression) {
2070                 DEBUG(0, (__location__ ": out of memory\n"));
2071                 return LDB_ERR_OPERATIONS_ERROR;
2072         }
2073
2074         res = talloc_zero(mem_ctx, struct ldb_result);
2075         if (!res) {
2076                 DEBUG(0, (__location__ ": out of memory\n"));
2077                 return LDB_ERR_OPERATIONS_ERROR;
2078         }
2079
2080         ret = ldb_build_search_req(&search_req, ldb, mem_ctx,
2081                                    ldb_get_default_basedn(ldb),
2082                                    LDB_SCOPE_SUBTREE,
2083                                    expression, attrs,
2084                                    NULL,
2085                                    res, ldb_search_default_callback,
2086                                    NULL);
2087         if (ret != LDB_SUCCESS) {
2088                 return ret;
2089         }
2090
2091         /* we need to cope with cross-partition links, so search for
2092            the GUID over all partitions */
2093         options = talloc(search_req, struct ldb_search_options_control);
2094         if (options == NULL) {
2095                 DEBUG(0, (__location__ ": out of memory\n"));
2096                 return LDB_ERR_OPERATIONS_ERROR;
2097         }
2098         options->search_options = LDB_SEARCH_OPTION_PHANTOM_ROOT;
2099
2100         ret = ldb_request_add_control(search_req,
2101                                       LDB_CONTROL_SEARCH_OPTIONS_OID,
2102                                       true, options);
2103         if (ret != LDB_SUCCESS) {
2104                 return ret;
2105         }
2106
2107         ret = ldb_request(ldb, search_req);
2108         if (ret != LDB_SUCCESS) {
2109                 return ret;
2110         }
2111
2112         ret = ldb_wait(search_req->handle, LDB_WAIT_ALL);
2113         if (ret != LDB_SUCCESS) {
2114                 return ret;
2115         }
2116
2117         /* this really should be exactly 1, but there is a bug in the
2118            partitions module that can return two here with the
2119            search_options control set */
2120         if (res->count < 1) {
2121                 return LDB_ERR_NO_SUCH_OBJECT;
2122         }
2123
2124         *dn = res->msgs[0]->dn;
2125
2126         return LDB_SUCCESS;
2127 }
2128
2129
2130 /*
2131   use a DN to find a GUID
2132  */
2133 int dsdb_find_guid_by_dn(struct ldb_context *ldb,
2134                          struct ldb_dn *dn, struct GUID *guid)
2135 {
2136         int ret;
2137         struct ldb_result *res;
2138         const char *attrs[] = { "objectGUID", NULL };
2139         TALLOC_CTX *tmp_ctx = talloc_new(ldb);
2140
2141         ret = ldb_search(ldb, tmp_ctx, &res, dn, LDB_SCOPE_BASE, attrs, NULL);
2142         if (ret != LDB_SUCCESS) {
2143                 talloc_free(tmp_ctx);
2144                 return ret;
2145         }
2146         *guid = samdb_result_guid(res->msgs[0], "objectGUID");
2147         talloc_free(tmp_ctx);
2148         return LDB_SUCCESS;
2149 }
2150
2151
2152
2153 /*
2154   load a repsFromTo blob list for a given partition GUID
2155   attr must be "repsFrom" or "repsTo"
2156  */
2157 WERROR dsdb_loadreps(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx, struct ldb_dn *dn,
2158                      const char *attr, struct repsFromToBlob **r, uint32_t *count)
2159 {
2160         const char *attrs[] = { attr, NULL };
2161         struct ldb_result *res = NULL;
2162         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
2163         int i;
2164         struct ldb_message_element *el;
2165
2166         *r = NULL;
2167         *count = 0;
2168
2169         if (ldb_search(sam_ctx, tmp_ctx, &res, dn, LDB_SCOPE_BASE, attrs, NULL) != LDB_SUCCESS ||
2170             res->count < 1) {
2171                 DEBUG(0,("dsdb_loadreps: failed to read partition object\n"));
2172                 talloc_free(tmp_ctx);
2173                 return WERR_DS_DRA_INTERNAL_ERROR;
2174         }
2175
2176         el = ldb_msg_find_element(res->msgs[0], attr);
2177         if (el == NULL) {
2178                 /* it's OK to be empty */
2179                 talloc_free(tmp_ctx);
2180                 return WERR_OK;
2181         }
2182
2183         *count = el->num_values;
2184         *r = talloc_array(mem_ctx, struct repsFromToBlob, *count);
2185         if (*r == NULL) {
2186                 talloc_free(tmp_ctx);
2187                 return WERR_DS_DRA_INTERNAL_ERROR;
2188         }
2189
2190         for (i=0; i<(*count); i++) {
2191                 enum ndr_err_code ndr_err;
2192                 ndr_err = ndr_pull_struct_blob(&el->values[i],
2193                                                mem_ctx, lp_iconv_convenience(ldb_get_opaque(sam_ctx, "loadparm")),
2194                                                &(*r)[i],
2195                                                (ndr_pull_flags_fn_t)ndr_pull_repsFromToBlob);
2196                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
2197                         talloc_free(tmp_ctx);
2198                         return WERR_DS_DRA_INTERNAL_ERROR;
2199                 }
2200         }
2201
2202         talloc_free(tmp_ctx);
2203
2204         return WERR_OK;
2205 }
2206
2207 /*
2208   save the repsFromTo blob list for a given partition GUID
2209   attr must be "repsFrom" or "repsTo"
2210  */
2211 WERROR dsdb_savereps(struct ldb_context *sam_ctx, TALLOC_CTX *mem_ctx, struct ldb_dn *dn,
2212                      const char *attr, struct repsFromToBlob *r, uint32_t count)
2213 {
2214         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
2215         struct ldb_message *msg;
2216         struct ldb_message_element *el;
2217         int i;
2218
2219         msg = ldb_msg_new(tmp_ctx);
2220         msg->dn = dn;
2221         if (ldb_msg_add_empty(msg, attr, LDB_FLAG_MOD_REPLACE, &el) != LDB_SUCCESS) {
2222                 goto failed;
2223         }
2224
2225         el->values = talloc_array(msg, struct ldb_val, count);
2226         if (!el->values) {
2227                 goto failed;
2228         }
2229
2230         for (i=0; i<count; i++) {
2231                 struct ldb_val v;
2232                 enum ndr_err_code ndr_err;
2233
2234                 ndr_err = ndr_push_struct_blob(&v, tmp_ctx, lp_iconv_convenience(ldb_get_opaque(sam_ctx, "loadparm")),
2235                                                &r[i],
2236                                                (ndr_push_flags_fn_t)ndr_push_repsFromToBlob);
2237                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
2238                         goto failed;
2239                 }
2240
2241                 el->num_values++;
2242                 el->values[i] = v;
2243         }
2244
2245         if (ldb_modify(sam_ctx, msg) != LDB_SUCCESS) {
2246                 DEBUG(0,("Failed to store %s - %s\n", attr, ldb_errstring(sam_ctx)));
2247                 goto failed;
2248         }
2249
2250         talloc_free(tmp_ctx);
2251
2252         return WERR_OK;
2253
2254 failed:
2255         talloc_free(tmp_ctx);
2256         return WERR_DS_DRA_INTERNAL_ERROR;
2257 }
2258
2259
2260 /*
2261   load the uSNHighest attribute from the @REPLCHANGED object for a
2262   partition
2263  */
2264 int dsdb_load_partition_usn(struct ldb_context *ldb, struct ldb_dn *dn, uint64_t *uSN)
2265 {
2266         struct ldb_request *req;
2267         int ret;
2268         TALLOC_CTX *tmp_ctx = talloc_new(ldb);
2269         struct dsdb_control_current_partition *p_ctrl;
2270         struct ldb_result *res;
2271
2272         res = talloc_zero(tmp_ctx, struct ldb_result);
2273         if (!res) {
2274                 talloc_free(tmp_ctx);
2275                 return LDB_ERR_OPERATIONS_ERROR;
2276         }
2277
2278         ret = ldb_build_search_req(&req, ldb, tmp_ctx,
2279                                    ldb_dn_new(tmp_ctx, ldb, "@REPLCHANGED"),
2280                                    LDB_SCOPE_BASE,
2281                                    NULL, NULL,
2282                                    NULL,
2283                                    res, ldb_search_default_callback,
2284                                    NULL);
2285         if (ret != LDB_SUCCESS) {
2286                 talloc_free(tmp_ctx);
2287                 return ret;
2288         }
2289
2290         p_ctrl = talloc(req, struct dsdb_control_current_partition);
2291         if (p_ctrl == NULL) {
2292                 talloc_free(res);
2293                 return LDB_ERR_OPERATIONS_ERROR;
2294         }
2295         p_ctrl->version = DSDB_CONTROL_CURRENT_PARTITION_VERSION;
2296         p_ctrl->dn = dn;
2297
2298
2299         ret = ldb_request_add_control(req,
2300                                       DSDB_CONTROL_CURRENT_PARTITION_OID,
2301                                       false, p_ctrl);
2302         if (ret != LDB_SUCCESS) {
2303                 talloc_free(tmp_ctx);
2304                 return ret;
2305         }
2306
2307         /* Run the new request */
2308         ret = ldb_request(ldb, req);
2309
2310         if (ret == LDB_SUCCESS) {
2311                 ret = ldb_wait(req->handle, LDB_WAIT_ALL);
2312         }
2313
2314         if (ret == LDB_ERR_NO_SUCH_OBJECT) {
2315                 /* it hasn't been created yet, which means
2316                    an implicit value of zero */
2317                 *uSN = 0;
2318                 talloc_free(tmp_ctx);
2319                 return LDB_SUCCESS;
2320         }
2321
2322         if (ret != LDB_SUCCESS) {
2323                 talloc_free(tmp_ctx);
2324                 return ret;
2325         }
2326
2327         if (res->count < 1) {
2328                 *uSN = 0;
2329         } else {
2330                 *uSN = ldb_msg_find_attr_as_uint64(res->msgs[0], "uSNHighest", 0);
2331         }
2332
2333         talloc_free(tmp_ctx);
2334
2335         return LDB_SUCCESS;
2336 }
2337
2338 /*
2339   save the uSNHighest attribute in the @REPLCHANGED object for a
2340   partition
2341  */
2342 int dsdb_save_partition_usn(struct ldb_context *ldb, struct ldb_dn *dn, uint64_t uSN)
2343 {
2344         struct ldb_request *req;
2345         struct ldb_message *msg;
2346         struct dsdb_control_current_partition *p_ctrl;
2347         int ret;
2348
2349         msg = ldb_msg_new(ldb);
2350         if (msg == NULL) {
2351                 return LDB_ERR_OPERATIONS_ERROR;
2352         }
2353
2354         msg->dn = ldb_dn_new(msg, ldb, "@REPLCHANGED");
2355         if (msg->dn == NULL) {
2356                 talloc_free(msg);
2357                 return LDB_ERR_OPERATIONS_ERROR;
2358         }
2359
2360         ret = ldb_msg_add_fmt(msg, "uSNHighest", "%llu", (unsigned long long)uSN);
2361         if (ret != LDB_SUCCESS) {
2362                 talloc_free(msg);
2363                 return ret;
2364         }
2365         msg->elements[0].flags = LDB_FLAG_MOD_REPLACE;
2366
2367
2368         p_ctrl = talloc(msg, struct dsdb_control_current_partition);
2369         if (p_ctrl == NULL) {
2370                 talloc_free(msg);
2371                 return LDB_ERR_OPERATIONS_ERROR;
2372         }
2373         p_ctrl->version = DSDB_CONTROL_CURRENT_PARTITION_VERSION;
2374         p_ctrl->dn = dn;
2375
2376         ret = ldb_build_mod_req(&req, ldb, msg,
2377                                 msg,
2378                                 NULL,
2379                                 NULL, ldb_op_default_callback,
2380                                 NULL);
2381 again:
2382         if (ret != LDB_SUCCESS) {
2383                 talloc_free(msg);
2384                 return ret;
2385         }
2386
2387         ret = ldb_request_add_control(req,
2388                                       DSDB_CONTROL_CURRENT_PARTITION_OID,
2389                                       false, p_ctrl);
2390         if (ret != LDB_SUCCESS) {
2391                 talloc_free(msg);
2392                 return ret;
2393         }
2394
2395         /* Run the new request */
2396         ret = ldb_request(ldb, req);
2397
2398         if (ret == LDB_SUCCESS) {
2399                 ret = ldb_wait(req->handle, LDB_WAIT_ALL);
2400         }
2401         if (ret == LDB_ERR_NO_SUCH_OBJECT) {
2402                 ret = ldb_build_add_req(&req, ldb, msg,
2403                                         msg,
2404                                         NULL,
2405                                         NULL, ldb_op_default_callback,
2406                                         NULL);
2407                 goto again;
2408         }
2409
2410         talloc_free(msg);
2411
2412         return ret;
2413 }