source4/dsdb/samdb/ldb_modules/samldb.c

   1 /*
   2    SAM ldb module
   3
   4    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2005
   5    Copyright (C) Simo Sorce  2004-2008
   6    Copyright (C) Matthias Dieter Wallnöfer 2009-2010
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 /*
  23  *  Name: ldb
  24  *
  25  *  Component: ldb samldb module
  26  *
  27  *  Description: add embedded user/group creation functionality
  28  *
  29  *  Author: Simo Sorce
  30  */
  31
  32 #include "includes.h"
  33 #include "libcli/ldap/ldap_ndr.h"
  34 #include "ldb_module.h"
  35 #include "dsdb/samdb/samdb.h"
  36 #include "dsdb/samdb/ldb_modules/util.h"
  37 #include "libcli/security/security.h"
  38 #include "librpc/gen_ndr/ndr_security.h"
  39 #include "../lib/util/util_ldb.h"
  40 #include "ldb_wrap.h"
  41 #include "param/param.h"
  42
  43 struct samldb_ctx;
  44
  45 typedef int (*samldb_step_fn_t)(struct samldb_ctx *);
  46
  47 struct samldb_step {
  48         struct samldb_step *next;
  49         samldb_step_fn_t fn;
  50 };
  51
  52 struct samldb_ctx {
  53         struct ldb_module *module;
  54         struct ldb_request *req;
  55
  56         /* used for add operations */
  57         const char *type;
  58
  59         /* the resulting message */
  60         struct ldb_message *msg;
  61
  62         /* used in "samldb_find_for_defaultObjectCategory" */
  63         struct ldb_dn *dn, *res_dn;
  64
  65         /* all the async steps necessary to complete the operation */
  66         struct samldb_step *steps;
  67         struct samldb_step *curstep;
  68
  69         /* If someone set an ares to forward controls and response back to the caller */
  70         struct ldb_reply *ares;
  71 };
  72
  73 static struct samldb_ctx *samldb_ctx_init(struct ldb_module *module,
  74                                           struct ldb_request *req)
  75 {
  76         struct ldb_context *ldb;
  77         struct samldb_ctx *ac;
  78
  79         ldb = ldb_module_get_ctx(module);
  80
  81         ac = talloc_zero(req, struct samldb_ctx);
  82         if (ac == NULL) {
  83                 ldb_oom(ldb);
  84                 return NULL;
  85         }
  86
  87         ac->module = module;
  88         ac->req = req;
  89
  90         return ac;
  91 }
  92
  93 static int samldb_add_step(struct samldb_ctx *ac, samldb_step_fn_t fn)
  94 {
  95         struct samldb_step *step, *stepper;
  96
  97         step = talloc_zero(ac, struct samldb_step);
  98         if (step == NULL) {
  99                 return ldb_oom(ldb_module_get_ctx(ac->module));
 100         }
 101
 102         step->fn = fn;
 103
 104         if (ac->steps == NULL) {
 105                 ac->steps = step;
 106                 ac->curstep = step;
 107         } else {
 108                 if (ac->curstep == NULL)
 109                         return ldb_operr(ldb_module_get_ctx(ac->module));
 110                 for (stepper = ac->curstep; stepper->next != NULL;
 111                         stepper = stepper->next);
 112                 stepper->next = step;
 113         }
 114
 115         return LDB_SUCCESS;
 116 }
 117
 118 static int samldb_first_step(struct samldb_ctx *ac)
 119 {
 120         if (ac->steps == NULL) {
 121                 return ldb_operr(ldb_module_get_ctx(ac->module));
 122         }
 123
 124         ac->curstep = ac->steps;
 125         return ac->curstep->fn(ac);
 126 }
 127
 128 static int samldb_next_step(struct samldb_ctx *ac)
 129 {
 130         if (ac->curstep->next) {
 131                 ac->curstep = ac->curstep->next;
 132                 return ac->curstep->fn(ac);
 133         }
 134
 135         /* we exit the samldb module here */
 136         /* If someone set an ares to forward controls and response back to the caller, use them */
 137         if (ac->ares) {
 138                 return ldb_module_done(ac->req, ac->ares->controls,
 139                                        ac->ares->response, LDB_SUCCESS);
 140         } else {
 141                 return ldb_module_done(ac->req, NULL, NULL, LDB_SUCCESS);
 142         }
 143 }
 144
 145
 146 /* sAMAccountName handling */
 147
 148 static int samldb_generate_sAMAccountName(struct ldb_context *ldb, struct ldb_message *msg)
 149 {
 150         char *name;
 151
 152         /* Format: $000000-000000000000 */
 153
 154         name = talloc_asprintf(msg, "$%.6X-%.6X%.6X",
 155                                 (unsigned int)generate_random(),
 156                                 (unsigned int)generate_random(),
 157                                 (unsigned int)generate_random());
 158         if (name == NULL) {
 159                 return ldb_oom(ldb);
 160         }
 161         return ldb_msg_add_steal_string(msg, "sAMAccountName", name);
 162 }
 163
 164 static int samldb_check_sAMAccountName(struct samldb_ctx *ac)
 165 {
 166         struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
 167         const char *name;
 168         int ret;
 169
 170         if (ldb_msg_find_element(ac->msg, "sAMAccountName") == NULL) {
 171                 ret = samldb_generate_sAMAccountName(ldb, ac->msg);
 172                 if (ret != LDB_SUCCESS) {
 173                         return ret;
 174                 }
 175         }
 176
 177         name = ldb_msg_find_attr_as_string(ac->msg, "sAMAccountName", NULL);
 178         if (name == NULL) {
 179                 return ldb_operr(ldb);
 180         }
 181
 182         ret = samdb_search_count(ldb, NULL, "(sAMAccountName=%s)",
 183                                  ldb_binary_encode_string(ac, name));
 184         if ((ret < 0) || (ret > 1)) {
 185                 return ldb_operr(ldb);
 186         }
 187         if (ret == 1) {
 188                 return LDB_ERR_ENTRY_ALREADY_EXISTS;
 189         }
 190
 191         return samldb_next_step(ac);
 192 }
 193
 194 /* sAMAccountType handling */
 195
 196 static int samldb_check_sAMAccountType(struct samldb_ctx *ac)
 197 {
 198         struct ldb_context *ldb;
 199         unsigned int account_type;
 200         unsigned int group_type;
 201         unsigned int uac;
 202         int ret;
 203
 204         ldb = ldb_module_get_ctx(ac->module);
 205
 206         /* make sure sAMAccountType is not specified */
 207         if (ldb_msg_find_element(ac->msg, "sAMAccountType") != NULL) {
 208                 ldb_asprintf_errstring(ldb,
 209                         "sAMAccountType must not be specified!");
 210                 return LDB_ERR_UNWILLING_TO_PERFORM;
 211         }
 212
 213         if (strcmp("user", ac->type) == 0) {
 214                 uac = samdb_result_uint(ac->msg, "userAccountControl", 0);
 215                 if (uac == 0) {
 216                         ldb_asprintf_errstring(ldb,
 217                                 "userAccountControl invalid!");
 218                         return LDB_ERR_UNWILLING_TO_PERFORM;
 219                 } else {
 220                         account_type = ds_uf2atype(uac);
 221                         ret = samdb_msg_add_uint(ldb,
 222                                                  ac->msg, ac->msg,
 223                                                  "sAMAccountType",
 224                                                  account_type);
 225                         if (ret != LDB_SUCCESS) {
 226                                 return ret;
 227                         }
 228                 }
 229         } else if (strcmp("group", ac->type) == 0) {
 230                 group_type = samdb_result_uint(ac->msg, "groupType", 0);
 231                 if (group_type == 0) {
 232                         ldb_asprintf_errstring(ldb,
 233                                 "groupType invalid!\n");
 234                         return LDB_ERR_UNWILLING_TO_PERFORM;
 235                 } else {
 236                         account_type = ds_gtype2atype(group_type);
 237                         ret = samdb_msg_add_uint(ldb,
 238                                                  ac->msg, ac->msg,
 239                                                  "sAMAccountType",
 240                                                  account_type);
 241                         if (ret != LDB_SUCCESS) {
 242                                 return ret;
 243                         }
 244                 }
 245         }
 246
 247         return samldb_next_step(ac);
 248 }
 249
 250 /* primaryGroupID handling */
 251
 252 static int samldb_check_primaryGroupID(struct samldb_ctx *ac)
 253 {
 254         struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
 255         struct ldb_dn *prim_group_dn;
 256         uint32_t rid;
 257         struct dom_sid *sid;
 258         int ret;
 259
 260         rid = samdb_result_uint(ac->msg, "primaryGroupID", (uint32_t) -1);
 261         if (rid == (uint32_t) -1) {
 262                 rid = DOMAIN_RID_USERS;
 263                 ret = samdb_msg_add_uint(ldb, ac->msg, ac->msg,
 264                                          "primaryGroupID", rid);
 265                 if (ret != LDB_SUCCESS) {
 266                         return ret;
 267                 }
 268         }
 269
 270         sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
 271         if (sid == NULL) {
 272                 return ldb_operr(ldb);
 273         }
 274
 275         prim_group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSID=%s)",
 276                                         dom_sid_string(ac, sid));
 277         if (prim_group_dn == NULL) {
 278                 ldb_asprintf_errstring(ldb,
 279                                        "Failed to find primary group with RID %u!",
 280                                        rid);
 281                 return LDB_ERR_UNWILLING_TO_PERFORM;
 282         }
 283
 284         return samldb_next_step(ac);
 285 }
 286
 287
 288 static bool samldb_msg_add_sid(struct ldb_message *msg,
 289                                 const char *name,
 290                                 const struct dom_sid *sid)
 291 {
 292         struct ldb_val v;
 293         enum ndr_err_code ndr_err;
 294
 295         ndr_err = ndr_push_struct_blob(&v, msg, sid,
 296                                        (ndr_push_flags_fn_t)ndr_push_dom_sid);
 297         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 298                 return false;
 299         }
 300         return (ldb_msg_add_value(msg, name, &v, NULL) == 0);
 301 }
 302
 303
 304 /* allocate a SID using our RID Set */
 305 static int samldb_allocate_sid(struct samldb_ctx *ac)
 306 {
 307         uint32_t rid;
 308         struct dom_sid *sid;
 309         struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
 310         int ret;
 311
 312         ret = ridalloc_allocate_rid(ac->module, &rid);
 313         if (ret != LDB_SUCCESS) {
 314                 return ret;
 315         }
 316
 317         sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
 318         if (sid == NULL) {
 319                 return ldb_module_oom(ac->module);
 320         }
 321
 322         if ( ! samldb_msg_add_sid(ac->msg, "objectSid", sid)) {
 323                 return ldb_operr(ldb);
 324         }
 325
 326         return samldb_next_step(ac);
 327 }
 328
 329 /*
 330   see if a krbtgt_number is available
 331  */
 332 static bool samldb_krbtgtnumber_available(struct samldb_ctx *ac, unsigned krbtgt_number)
 333 {
 334         TALLOC_CTX *tmp_ctx = talloc_new(ac);
 335         struct ldb_result *res;
 336         const char *attrs[] = { NULL };
 337         int ret;
 338
 339         ret = dsdb_module_search(ac->module, tmp_ctx, &res, NULL, LDB_SCOPE_SUBTREE,
 340                                  attrs, DSDB_FLAG_NEXT_MODULE,
 341                                  "msDC-SecondaryKrbTgtNumber=%u", krbtgt_number);
 342         if (ret == LDB_SUCCESS && res->count == 0) {
 343                 talloc_free(tmp_ctx);
 344                 return true;
 345         }
 346         talloc_free(tmp_ctx);
 347         return false;
 348 }
 349
 350 /* special handling for add in RODC join */
 351 static int samldb_rodc_add(struct samldb_ctx *ac)
 352 {
 353         struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
 354         unsigned krbtgt_number, i_start, i;
 355         int ret;
 356
 357         /* find a unused msDC-SecondaryKrbTgtNumber */
 358         i_start = generate_random() & 0xFFFF;
 359         if (i_start == 0) {
 360                 i_start = 1;
 361         }
 362
 363         for (i=i_start; i<=0xFFFF; i++) {
 364                 if (samldb_krbtgtnumber_available(ac, i)) {
 365                         krbtgt_number = i;
 366                         goto found;
 367                 }
 368         }
 369         for (i=1; i<i_start; i++) {
 370                 if (samldb_krbtgtnumber_available(ac, i)) {
 371                         krbtgt_number = i;
 372                         goto found;
 373                 }
 374         }
 375
 376         ldb_asprintf_errstring(ldb_module_get_ctx(ac->module),
 377                                "%08X: Unable to find available msDS-SecondaryKrbTgtNumber",
 378                                W_ERROR_V(WERR_NO_SYSTEM_RESOURCES));
 379         return LDB_ERR_OTHER;
 380
 381 found:
 382         ret = ldb_msg_add_empty(ac->msg, "msDS-SecondaryKrbTgtNumber", LDB_FLAG_INTERNAL_DISABLE_VALIDATION, NULL);
 383         if (ret != LDB_SUCCESS) {
 384                 return ldb_operr(ldb);
 385         }
 386
 387         ret = ldb_msg_add_fmt(ac->msg, "msDS-SecondaryKrbTgtNumber", "%u", krbtgt_number);
 388         if (ret != LDB_SUCCESS) {
 389                 return ldb_operr(ldb);
 390         }
 391
 392         ret = ldb_msg_add_fmt(ac->msg, "sAMAccountName", "krbtgt_%u", krbtgt_number);
 393         if (ret != LDB_SUCCESS) {
 394                 return ldb_operr(ldb);
 395         }
 396
 397         return samldb_next_step(ac);
 398 }
 399
 400 static int samldb_find_for_defaultObjectCategory(struct samldb_ctx *ac)
 401 {
 402         struct ldb_context *ldb = ldb_module_get_ctx(ac->module);
 403         struct ldb_result *res;
 404         const char *no_attrs[] = { NULL };
 405         int ret;
 406
 407         ac->res_dn = NULL;
 408
 409         ret = dsdb_module_search(ac->module, ac, &res,
 410                                  ac->dn, LDB_SCOPE_BASE, no_attrs,
 411                                  DSDB_SEARCH_SHOW_DN_IN_STORAGE_FORMAT | DSDB_FLAG_NEXT_MODULE,
 412                                  "(objectClass=classSchema)");
 413         if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 414                 /* Don't be pricky when the DN doesn't exist if we have the */
 415                 /* RELAX control specified */
 416                 if (ldb_request_get_control(ac->req,
 417                                             LDB_CONTROL_RELAX_OID) == NULL) {
 418                         ldb_set_errstring(ldb,
 419                                           "samldb_find_defaultObjectCategory: "
 420                                           "Invalid DN for 'defaultObjectCategory'!");
 421                         return LDB_ERR_CONSTRAINT_VIOLATION;
 422                 }
 423         }
 424         if ((ret != LDB_ERR_NO_SUCH_OBJECT) && (ret != LDB_SUCCESS)) {
 425                 return ret;
 426         }
 427
 428         ac->res_dn = ac->dn;
 429
 430         return samldb_next_step(ac);
 431 }
 432
 433 /**
 434  * msDS-IntId attributeSchema attribute handling
 435  * during LDB_ADD request processing
 436  */
 437 static int samldb_add_handle_msDS_IntId(struct samldb_ctx *ac)
 438 {
 439         int ret;
 440         bool id_exists;
 441         uint32_t msds_intid;
 442         uint32_t system_flags;
 443         struct ldb_context *ldb;
 444         struct ldb_result *ldb_res;
 445         struct ldb_dn *schema_dn;
 446
 447         ldb = ldb_module_get_ctx(ac->module);
 448         schema_dn = ldb_get_schema_basedn(ldb);
 449
 450         /* replicated update should always go through */
 451         if (ldb_request_get_control(ac->req, DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
 452                 return LDB_SUCCESS;
 453         }
 454
 455         /* msDS-IntId is handled by system and should never be
 456          * passed by clients */
 457         if (ldb_msg_find_element(ac->msg, "msDS-IntId")) {
 458                 return LDB_ERR_UNWILLING_TO_PERFORM;
 459         }
 460
 461         /* do not generate msDS-IntId if Relax control is passed */
 462         if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
 463                 return LDB_SUCCESS;
 464         }
 465
 466         /* check Functional Level */
 467         if (dsdb_functional_level(ldb) < DS_DOMAIN_FUNCTION_2003) {
 468                 return LDB_SUCCESS;
 469         }
 470
 471         /* check systemFlags for SCHEMA_BASE_OBJECT flag */
 472         system_flags = ldb_msg_find_attr_as_uint(ac->msg, "systemFlags", 0);
 473         if (system_flags & SYSTEM_FLAG_SCHEMA_BASE_OBJECT) {
 474                 return LDB_SUCCESS;
 475         }
 476
 477         /* Generate new value for msDs-IntId
 478          * Value should be in 0x80000000..0xBFFFFFFF range */
 479         msds_intid = generate_random() % 0X3FFFFFFF;
 480         msds_intid += 0x80000000;
 481
 482         /* probe id values until unique one is found */
 483         do {
 484                 msds_intid++;
 485                 if (msds_intid > 0xBFFFFFFF) {
 486                         msds_intid = 0x80000001;
 487                 }
 488
 489                 ret = dsdb_module_search(ac->module, ac,
 490                                          &ldb_res,
 491                                          schema_dn, LDB_SCOPE_ONELEVEL, NULL,
 492                                          DSDB_FLAG_NEXT_MODULE,
 493                                          "(msDS-IntId=%d)", msds_intid);
 494                 if (ret != LDB_SUCCESS) {
 495                         ldb_debug_set(ldb, LDB_DEBUG_ERROR,
 496                                       __location__": Searching for msDS-IntId=%d failed - %s\n",
 497                                       msds_intid,
 498                                       ldb_errstring(ldb));
 499                         return ldb_operr(ldb);
 500                 }
 501                 id_exists = (ldb_res->count > 0);
 502
 503                 talloc_free(ldb_res);
 504         } while(id_exists);
 505
 506         return ldb_msg_add_fmt(ac->msg, "msDS-IntId", "%d", msds_intid);
 507 }
 508
 509
 510 /*
 511  * samldb_add_entry (async)
 512  */
 513
 514 static int samldb_add_entry_callback(struct ldb_request *req,
 515                                         struct ldb_reply *ares)
 516 {
 517         struct ldb_context *ldb;
 518         struct samldb_ctx *ac;
 519         int ret;
 520
 521         ac = talloc_get_type(req->context, struct samldb_ctx);
 522         ldb = ldb_module_get_ctx(ac->module);
 523
 524         if (!ares) {
 525                 return ldb_module_done(ac->req, NULL, NULL,
 526                                         LDB_ERR_OPERATIONS_ERROR);
 527         }
 528
 529         if (ares->type == LDB_REPLY_REFERRAL) {
 530                 return ldb_module_send_referral(ac->req, ares->referral);
 531         }
 532
 533         if (ares->error != LDB_SUCCESS) {
 534                 return ldb_module_done(ac->req, ares->controls,
 535                                         ares->response, ares->error);
 536         }
 537         if (ares->type != LDB_REPLY_DONE) {
 538                 ldb_set_errstring(ldb,
 539                         "Invalid reply type!\n");
 540                 return ldb_module_done(ac->req, NULL, NULL,
 541                                         LDB_ERR_OPERATIONS_ERROR);
 542         }
 543
 544         /* The caller may wish to get controls back from the add */
 545         ac->ares = talloc_steal(ac, ares);
 546
 547         ret = samldb_next_step(ac);
 548         if (ret != LDB_SUCCESS) {
 549                 return ldb_module_done(ac->req, NULL, NULL, ret);
 550         }
 551         return ret;
 552 }
 553
 554 static int samldb_add_entry(struct samldb_ctx *ac)
 555 {
 556         struct ldb_context *ldb;
 557         struct ldb_request *req;
 558         int ret;
 559
 560         ldb = ldb_module_get_ctx(ac->module);
 561
 562         ret = ldb_build_add_req(&req, ldb, ac,
 563                                 ac->msg,
 564                                 ac->req->controls,
 565                                 ac, samldb_add_entry_callback,
 566                                 ac->req);
 567         if (ret != LDB_SUCCESS) {
 568                 return ret;
 569         }
 570
 571         return ldb_next_request(ac->module, req);
 572 }
 573
 574 /*
 575  * return true if msg carries an attributeSchema that is intended to be RODC
 576  * filtered but is also a system-critical attribute.
 577  */
 578 static bool check_rodc_critical_attribute(struct ldb_message *msg)
 579 {
 580         uint32_t schemaFlagsEx, searchFlags, rodc_filtered_flags;
 581
 582         schemaFlagsEx = ldb_msg_find_attr_as_uint(msg, "schemaFlagsEx", 0);
 583         searchFlags = ldb_msg_find_attr_as_uint(msg, "searchFlags", 0);
 584         rodc_filtered_flags = (SEARCH_FLAG_RODC_ATTRIBUTE | SEARCH_FLAG_CONFIDENTIAL);
 585
 586         if ((schemaFlagsEx & SCHEMA_FLAG_ATTR_IS_CRITICAL) &&
 587                 ((searchFlags & rodc_filtered_flags) == rodc_filtered_flags)) {
 588                 return true;
 589         } else {
 590                 return false;
 591         }
 592 }
 593
 594
 595 static int samldb_fill_object(struct samldb_ctx *ac, const char *type)
 596 {
 597         struct ldb_context *ldb;
 598         struct loadparm_context *lp_ctx;
 599         enum sid_generator sid_generator;
 600         int ret;
 601         struct ldb_control *rodc_control;
 602         struct dom_sid *sid;
 603
 604         ldb = ldb_module_get_ctx(ac->module);
 605
 606         /* Add informations for the different account types */
 607         ac->type = type;
 608         if (strcmp(ac->type, "user") == 0) {
 609                 ret = samdb_find_or_add_attribute(ldb, ac->msg,
 610                         "userAccountControl", "546");
 611                 if (ret != LDB_SUCCESS) return ret;
 612                 ret = samdb_find_or_add_attribute(ldb, ac->msg,
 613                         "badPwdCount", "0");
 614                 if (ret != LDB_SUCCESS) return ret;
 615                 ret = samdb_find_or_add_attribute(ldb, ac->msg,
 616                         "codePage", "0");
 617                 if (ret != LDB_SUCCESS) return ret;
 618                 ret = samdb_find_or_add_attribute(ldb, ac->msg,
 619                         "countryCode", "0");
 620                 if (ret != LDB_SUCCESS) return ret;
 621                 ret = samdb_find_or_add_attribute(ldb, ac->msg,
 622                         "badPasswordTime", "0");
 623                 if (ret != LDB_SUCCESS) return ret;
 624                 ret = samdb_find_or_add_attribute(ldb, ac->msg,
 625                         "lastLogoff", "0");
 626                 if (ret != LDB_SUCCESS) return ret;
 627                 ret = samdb_find_or_add_attribute(ldb, ac->msg,
 628                         "lastLogon", "0");
 629                 if (ret != LDB_SUCCESS) return ret;
 630                 ret = samdb_find_or_add_attribute(ldb, ac->msg,
 631                         "pwdLastSet", "0");
 632                 if (ret != LDB_SUCCESS) return ret;
 633                 ret = samdb_find_or_add_attribute(ldb, ac->msg,
 634                         "accountExpires", "9223372036854775807");
 635                 if (ret != LDB_SUCCESS) return ret;
 636                 ret = samdb_find_or_add_attribute(ldb, ac->msg,
 637                         "logonCount", "0");
 638                 if (ret != LDB_SUCCESS) return ret;
 639         } else if (strcmp(ac->type, "group") == 0) {
 640                 ret = samdb_find_or_add_attribute(ldb, ac->msg,
 641                         "groupType", "-2147483646");
 642                 if (ret != LDB_SUCCESS) return ret;
 643         } else if (strcmp(ac->type, "classSchema") == 0) {
 644                 const struct ldb_val *rdn_value, *def_obj_cat_val;
 645
 646                 ret = samdb_find_or_add_attribute(ldb, ac->msg,
 647                                                   "rdnAttId", "cn");
 648                 if (ret != LDB_SUCCESS) return ret;
 649
 650                 /* do not allow to mark an attributeSchema as RODC filtered if it
 651                  * is system-critical */
 652                 if (check_rodc_critical_attribute(ac->msg)) {
 653                         ldb_asprintf_errstring(ldb, "Refusing schema add of %s - cannot combine critical class with RODC filtering",
 654                                                ldb_dn_get_linearized(ac->msg->dn));
 655                         return LDB_ERR_UNWILLING_TO_PERFORM;
 656                 }
 657
 658
 659                 rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
 660                 if (!ldb_msg_find_element(ac->msg, "lDAPDisplayName")) {
 661                         /* the RDN has prefix "CN" */
 662                         ret = ldb_msg_add_string(ac->msg, "lDAPDisplayName",
 663                                 samdb_cn_to_lDAPDisplayName(ac,
 664                                         (const char *) rdn_value->data));
 665                         if (ret != LDB_SUCCESS) {
 666                                 ldb_oom(ldb);
 667                                 return ret;
 668                         }
 669                 }
 670
 671                 if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) {
 672                         struct GUID guid;
 673                         /* a new GUID */
 674                         guid = GUID_random();
 675                         ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID");
 676                         if (ret != LDB_SUCCESS) {
 677                                 ldb_oom(ldb);
 678                                 return ret;
 679                         }
 680                 }
 681
 682                 def_obj_cat_val = ldb_msg_find_ldb_val(ac->msg,
 683                                                        "defaultObjectCategory");
 684                 if (def_obj_cat_val != NULL) {
 685                         /* "defaultObjectCategory" has been set by the caller.
 686                          * Do some checks for consistency.
 687                          * NOTE: The real constraint check (that
 688                          * 'defaultObjectCategory' is the DN of the new
 689                          * objectclass or any parent of it) is still incomplete.
 690                          * For now we say that 'defaultObjectCategory' is valid
 691                          * if it exists and it is of objectclass "classSchema".
 692                          */
 693                         ac->dn = ldb_dn_from_ldb_val(ac, ldb, def_obj_cat_val);
 694                         if (ac->dn == NULL) {
 695                                 ldb_set_errstring(ldb,
 696                                                   "Invalid DN for 'defaultObjectCategory'!");
 697                                 return LDB_ERR_CONSTRAINT_VIOLATION;
 698                         }
 699                 } else {
 700                         /* "defaultObjectCategory" has not been set by the
 701                          * caller. Use the entry DN for it. */
 702                         ac->dn = ac->msg->dn;
 703
 704                         ret = samdb_msg_add_string(ldb, ac, ac->msg,
 705                                                    "defaultObjectCategory",
 706                                                    ldb_dn_get_linearized(ac->dn));
 707                         if (ret != LDB_SUCCESS) {
 708                                 ldb_oom(ldb);
 709                                 return ret;
 710                         }
 711                 }
 712
 713                 ret = samldb_add_step(ac, samldb_add_entry);
 714                 if (ret != LDB_SUCCESS) return ret;
 715
 716                 /* Now perform the checks for the 'defaultObjectCategory'. The
 717                  * lookup DN was already saved in "ac->dn" */
 718                 ret = samldb_add_step(ac, samldb_find_for_defaultObjectCategory);
 719                 if (ret != LDB_SUCCESS) return ret;
 720
 721                 return samldb_first_step(ac);
 722         } else if (strcmp(ac->type, "attributeSchema") == 0) {
 723                 const struct ldb_val *rdn_value;
 724                 rdn_value = ldb_dn_get_rdn_val(ac->msg->dn);
 725                 if (!ldb_msg_find_element(ac->msg, "lDAPDisplayName")) {
 726                         /* the RDN has prefix "CN" */
 727                         ret = ldb_msg_add_string(ac->msg, "lDAPDisplayName",
 728                                 samdb_cn_to_lDAPDisplayName(ac,
 729                                         (const char *) rdn_value->data));
 730                         if (ret != LDB_SUCCESS) {
 731                                 ldb_oom(ldb);
 732                                 return ret;
 733                         }
 734                 }
 735
 736                 /* do not allow to mark an attributeSchema as RODC filtered if it
 737                  * is system-critical */
 738                 if (check_rodc_critical_attribute(ac->msg)) {
 739                         ldb_asprintf_errstring(ldb, "Refusing schema add of %s - cannot combine critical attribute with RODC filtering",
 740                                                ldb_dn_get_linearized(ac->msg->dn));
 741                         return LDB_ERR_UNWILLING_TO_PERFORM;
 742                 }
 743
 744                 ret = samdb_find_or_add_attribute(ldb, ac->msg,
 745                                                   "isSingleValued", "FALSE");
 746                 if (ret != LDB_SUCCESS) return ret;
 747
 748                 if (!ldb_msg_find_element(ac->msg, "schemaIDGUID")) {
 749                         struct GUID guid;
 750                         /* a new GUID */
 751                         guid = GUID_random();
 752                         ret = dsdb_msg_add_guid(ac->msg, &guid, "schemaIDGUID");
 753                         if (ret != LDB_SUCCESS) {
 754                                 ldb_oom(ldb);
 755                                 return ret;
 756                         }
 757                 }
 758
 759                 /* handle msDS-IntID attribute */
 760                 ret = samldb_add_handle_msDS_IntId(ac);
 761                 if (ret != LDB_SUCCESS) return ret;
 762
 763                 ret = samldb_add_step(ac, samldb_add_entry);
 764                 if (ret != LDB_SUCCESS) return ret;
 765
 766                 return samldb_first_step(ac);
 767         } else {
 768                 ldb_asprintf_errstring(ldb,
 769                         "Invalid entry type!");
 770                 return LDB_ERR_OPERATIONS_ERROR;
 771         }
 772
 773         rodc_control = ldb_request_get_control(ac->req, LDB_CONTROL_RODC_DCPROMO_OID);
 774         if (rodc_control) {
 775                 /* see [MS-ADTS] 3.1.1.3.4.1.23 LDAP_SERVER_RODC_DCPROMO_OID */
 776                 rodc_control->critical = false;
 777                 ret = samldb_add_step(ac, samldb_rodc_add);
 778                 if (ret != LDB_SUCCESS) return ret;
 779         }
 780
 781         /* check if we have a valid sAMAccountName */
 782         ret = samldb_add_step(ac, samldb_check_sAMAccountName);
 783         if (ret != LDB_SUCCESS) return ret;
 784
 785         /* check account_type/group_type */
 786         ret = samldb_add_step(ac, samldb_check_sAMAccountType);
 787         if (ret != LDB_SUCCESS) return ret;
 788
 789         /* check if we have a valid primary group ID */
 790         if (strcmp(ac->type, "user") == 0) {
 791                 ret = samldb_add_step(ac, samldb_check_primaryGroupID);
 792                 if (ret != LDB_SUCCESS) return ret;
 793         }
 794
 795         lp_ctx = talloc_get_type(ldb_get_opaque(ldb, "loadparm"),
 796                  struct loadparm_context);
 797
 798         /* don't allow objectSID to be specified without the RELAX control */
 799         sid = samdb_result_dom_sid(ac, ac->msg, "objectSid");
 800         if (sid && !ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID) &&
 801             !dsdb_module_am_system(ac->module)) {
 802                 ldb_asprintf_errstring(ldb, "No SID may be specified in user/group creation for %s",
 803                                        ldb_dn_get_linearized(ac->msg->dn));
 804                 return LDB_ERR_UNWILLING_TO_PERFORM;
 805         }
 806
 807         if (sid == NULL) {
 808                 sid_generator = lpcfg_sid_generator(lp_ctx);
 809                 if (sid_generator == SID_GENERATOR_INTERNAL) {
 810                         ret = samldb_add_step(ac, samldb_allocate_sid);
 811                         if (ret != LDB_SUCCESS) return ret;
 812                 }
 813         }
 814
 815         /* finally proceed with adding the entry */
 816         ret = samldb_add_step(ac, samldb_add_entry);
 817         if (ret != LDB_SUCCESS) return ret;
 818
 819         return samldb_first_step(ac);
 820 }
 821
 822 static int samldb_fill_foreignSecurityPrincipal_object(struct samldb_ctx *ac)
 823 {
 824         struct ldb_context *ldb;
 825         struct dom_sid *sid;
 826         int ret;
 827
 828         ldb = ldb_module_get_ctx(ac->module);
 829
 830         sid = samdb_result_dom_sid(ac->msg, ac->msg, "objectSid");
 831         if (sid == NULL) {
 832                 sid = dom_sid_parse_talloc(ac->msg,
 833                                            (const char *)ldb_dn_get_rdn_val(ac->msg->dn)->data);
 834                 if (sid == NULL) {
 835                         ldb_set_errstring(ldb,
 836                                         "No valid SID found in "
 837                                         "ForeignSecurityPrincipal CN!");
 838                         return LDB_ERR_CONSTRAINT_VIOLATION;
 839                 }
 840                 if (! samldb_msg_add_sid(ac->msg, "objectSid", sid)) {
 841                         return ldb_operr(ldb);
 842                 }
 843         }
 844
 845         /* finally proceed with adding the entry */
 846         ret = samldb_add_step(ac, samldb_add_entry);
 847         if (ret != LDB_SUCCESS) return ret;
 848
 849         return samldb_first_step(ac);
 850 }
 851
 852 static int samldb_schema_info_update(struct samldb_ctx *ac)
 853 {
 854         WERROR werr;
 855         struct ldb_context *ldb;
 856         struct dsdb_schema *schema;
 857
 858         /* replicated update should always go through */
 859         if (ldb_request_get_control(ac->req, DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
 860                 return LDB_SUCCESS;
 861         }
 862
 863         /* do not update schemaInfo during provisioning */
 864         if (ldb_request_get_control(ac->req, LDB_CONTROL_RELAX_OID)) {
 865                 return LDB_SUCCESS;
 866         }
 867
 868         ldb = ldb_module_get_ctx(ac->module);
 869         schema = dsdb_get_schema(ldb, NULL);
 870         if (!schema) {
 871                 ldb_debug_set(ldb, LDB_DEBUG_FATAL,
 872                               "samldb_schema_info_update: no dsdb_schema loaded");
 873                 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
 874                 return ldb_operr(ldb);
 875         }
 876
 877         werr = dsdb_module_schema_info_update(ac->module, schema, DSDB_FLAG_NEXT_MODULE);
 878         if (!W_ERROR_IS_OK(werr)) {
 879                 ldb_debug_set(ldb, LDB_DEBUG_FATAL,
 880                               "samldb_schema_info_update: "
 881                               "dsdb_module_schema_info_update failed with %s",
 882                               win_errstr(werr));
 883                 DEBUG(0,(__location__ ": %s\n", ldb_errstring(ldb)));
 884                 return ldb_operr(ldb);
 885         }
 886
 887         return LDB_SUCCESS;
 888 }
 889
 890
 891 static int samldb_prim_group_change(struct samldb_ctx *ac)
 892 {
 893         struct ldb_context *ldb;
 894         const char * attrs[] = { "primaryGroupID", "memberOf", NULL };
 895         struct ldb_result *res;
 896         struct ldb_message_element *el;
 897         struct ldb_message *msg;
 898         uint32_t rid;
 899         struct dom_sid *sid;
 900         struct ldb_dn *prev_prim_group_dn, *new_prim_group_dn;
 901         int ret;
 902
 903         ldb = ldb_module_get_ctx(ac->module);
 904
 905         /* Fetch informations from the existing object */
 906
 907         ret = ldb_search(ldb, ac, &res, ac->msg->dn, LDB_SCOPE_BASE, attrs,
 908                          NULL);
 909         if (ret != LDB_SUCCESS) {
 910                 return ret;
 911         }
 912
 913         /* Finds out the DN of the old primary group */
 914
 915         rid = samdb_result_uint(res->msgs[0], "primaryGroupID", (uint32_t) -1);
 916         if (rid == (uint32_t) -1) {
 917                 /* User objects do always have a mandatory "primaryGroupID"
 918                  * attribute. If this doesn't exist then the object is of the
 919                  * wrong type. This is the exact Windows error code */
 920                 return LDB_ERR_OBJECT_CLASS_VIOLATION;
 921         }
 922
 923         sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
 924         if (sid == NULL) {
 925                 return ldb_operr(ldb);
 926         }
 927
 928         prev_prim_group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSID=%s)",
 929                                              dom_sid_string(ac, sid));
 930         if (prev_prim_group_dn == NULL) {
 931                 return ldb_operr(ldb);
 932         }
 933
 934         /* Finds out the DN of the new primary group */
 935
 936         rid = samdb_result_uint(ac->msg, "primaryGroupID", (uint32_t) -1);
 937         if (rid == (uint32_t) -1) {
 938                 /* we aren't affected of any primary group change */
 939                 return LDB_SUCCESS;
 940         }
 941
 942         sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb), rid);
 943         if (sid == NULL) {
 944                 return ldb_operr(ldb);
 945         }
 946
 947         new_prim_group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSID=%s)",
 948                                             dom_sid_string(ac, sid));
 949         if (new_prim_group_dn == NULL) {
 950                 /* Here we know if the specified new primary group candidate is
 951                  * valid or not. */
 952                 return LDB_ERR_UNWILLING_TO_PERFORM;
 953         }
 954
 955         /* Only update the "member" attributes when we really do have a change */
 956         if (ldb_dn_compare(new_prim_group_dn, prev_prim_group_dn) != 0) {
 957                 /* We need to be already a normal member of the new primary
 958                  * group in order to be successful. */
 959                 el = samdb_find_attribute(ldb, res->msgs[0], "memberOf",
 960                                           ldb_dn_get_linearized(new_prim_group_dn));
 961                 if (el == NULL) {
 962                         return LDB_ERR_UNWILLING_TO_PERFORM;
 963                 }
 964
 965                 /* Remove the "member" attribute on the new primary group */
 966                 msg = talloc_zero(ac, struct ldb_message);
 967                 msg->dn = new_prim_group_dn;
 968
 969                 ret = samdb_msg_add_delval(ldb, ac, msg, "member",
 970                                            ldb_dn_get_linearized(ac->msg->dn));
 971                 if (ret != LDB_SUCCESS) {
 972                         return ret;
 973                 }
 974
 975                 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE);
 976                 if (ret != LDB_SUCCESS) {
 977                         return ret;
 978                 }
 979
 980                 /* Add a "member" attribute for the previous primary group */
 981                 msg = talloc_zero(ac, struct ldb_message);
 982                 msg->dn = prev_prim_group_dn;
 983
 984                 ret = samdb_msg_add_addval(ldb, ac, msg, "member",
 985                                            ldb_dn_get_linearized(ac->msg->dn));
 986                 if (ret != LDB_SUCCESS) {
 987                         return ret;
 988                 }
 989
 990                 ret = dsdb_module_modify(ac->module, msg, DSDB_FLAG_NEXT_MODULE);
 991                 if (ret != LDB_SUCCESS) {
 992                         return ret;
 993                 }
 994         }
 995
 996         return LDB_SUCCESS;
 997 }
 998
 999
1000 static int samldb_member_check(struct samldb_ctx *ac)
1001 {
1002         struct ldb_context *ldb;
1003         struct ldb_message_element *el;
1004         struct ldb_dn *member_dn, *group_dn;
1005         uint32_t prim_group_rid;
1006         struct dom_sid *sid;
1007         unsigned int i;
1008
1009         ldb = ldb_module_get_ctx(ac->module);
1010
1011         el = ldb_msg_find_element(ac->msg, "member");
1012         if (el == NULL) {
1013                 /* we aren't affected */
1014                 return LDB_SUCCESS;
1015         }
1016
1017         for (i = 0; i < el->num_values; i++) {
1018                 /* Denies to add "member"s to groups which are primary ones
1019                  * for them */
1020                 member_dn = ldb_dn_from_ldb_val(ac, ldb, &el->values[i]);
1021                 if (!ldb_dn_validate(member_dn)) {
1022                         return ldb_operr(ldb);
1023                 }
1024
1025                 prim_group_rid = samdb_search_uint(ldb, ac, (uint32_t) -1,
1026                                                    member_dn, "primaryGroupID",
1027                                                    NULL);
1028                 if (prim_group_rid == (uint32_t) -1) {
1029                         /* the member hasn't to be a user account -> therefore
1030                          * no check needed in this case. */
1031                         continue;
1032                 }
1033
1034                 sid = dom_sid_add_rid(ac, samdb_domain_sid(ldb),
1035                                       prim_group_rid);
1036                 if (sid == NULL) {
1037                         return ldb_operr(ldb);
1038                 }
1039
1040                 group_dn = samdb_search_dn(ldb, ac, NULL, "(objectSID=%s)",
1041                                            dom_sid_string(ac, sid));
1042                 if (group_dn == NULL) {
1043                         return ldb_operr(ldb);
1044                 }
1045
1046                 if (ldb_dn_compare(group_dn, ac->msg->dn) == 0) {
1047                         return LDB_ERR_ENTRY_ALREADY_EXISTS;
1048                 }
1049         }
1050
1051         return LDB_SUCCESS;
1052 }
1053
1054
1055 /* add */
1056 static int samldb_add(struct ldb_module *module, struct ldb_request *req)
1057 {
1058         struct ldb_context *ldb;
1059         struct samldb_ctx *ac;
1060         int ret;
1061
1062         ldb = ldb_module_get_ctx(module);
1063         ldb_debug(ldb, LDB_DEBUG_TRACE, "samldb_add\n");
1064
1065         /* do not manipulate our control entries */
1066         if (ldb_dn_is_special(req->op.add.message->dn)) {
1067                 return ldb_next_request(module, req);
1068         }
1069
1070         ac = samldb_ctx_init(module, req);
1071         if (ac == NULL) {
1072                 return ldb_operr(ldb);
1073         }
1074
1075         /* build the new msg */
1076         ac->msg = ldb_msg_copy(ac, ac->req->op.add.message);
1077         if (!ac->msg) {
1078                 talloc_free(ac);
1079                 ldb_debug(ldb, LDB_DEBUG_FATAL,
1080                           "samldb_add: ldb_msg_copy failed!\n");
1081                 return ldb_operr(ldb);
1082         }
1083
1084         if (samdb_find_attribute(ldb, ac->msg,
1085                                  "objectclass", "user") != NULL) {
1086                 return samldb_fill_object(ac, "user");
1087         }
1088
1089         if (samdb_find_attribute(ldb, ac->msg,
1090                                  "objectclass", "group") != NULL) {
1091                 return samldb_fill_object(ac, "group");
1092         }
1093
1094         /* perhaps a foreignSecurityPrincipal? */
1095         if (samdb_find_attribute(ldb, ac->msg,
1096                                  "objectclass",
1097                                  "foreignSecurityPrincipal") != NULL) {
1098                 return samldb_fill_foreignSecurityPrincipal_object(ac);
1099         }
1100
1101         if (samdb_find_attribute(ldb, ac->msg,
1102                                  "objectclass", "classSchema") != NULL) {
1103                 ret = samldb_schema_info_update(ac);
1104                 if (ret != LDB_SUCCESS) {
1105                         talloc_free(ac);
1106                         return ret;
1107                 }
1108
1109                 return samldb_fill_object(ac, "classSchema");
1110         }
1111
1112         if (samdb_find_attribute(ldb, ac->msg,
1113                                  "objectclass", "attributeSchema") != NULL) {
1114                 ret = samldb_schema_info_update(ac);
1115                 if (ret != LDB_SUCCESS) {
1116                         talloc_free(ac);
1117                         return ret;
1118                 }
1119
1120                 return samldb_fill_object(ac, "attributeSchema");
1121         }
1122
1123         talloc_free(ac);
1124
1125         /* nothing matched, go on */
1126         return ldb_next_request(module, req);
1127 }
1128
1129 /* modify */
1130 static int samldb_modify(struct ldb_module *module, struct ldb_request *req)
1131 {
1132         struct ldb_context *ldb;
1133         struct samldb_ctx *ac;
1134         struct ldb_message *msg;
1135         struct ldb_message_element *el, *el2;
1136         int ret;
1137         uint32_t account_type;
1138
1139         if (ldb_dn_is_special(req->op.mod.message->dn)) {
1140                 /* do not manipulate our control entries */
1141                 return ldb_next_request(module, req);
1142         }
1143
1144         ldb = ldb_module_get_ctx(module);
1145
1146         if (ldb_msg_find_element(req->op.mod.message, "sAMAccountType") != NULL) {
1147                 ldb_asprintf_errstring(ldb,
1148                         "sAMAccountType must not be specified!");
1149                 return LDB_ERR_UNWILLING_TO_PERFORM;
1150         }
1151
1152         /* msDS-IntId is not allowed to be modified
1153          * except when modification comes from replication */
1154         if (ldb_msg_find_element(req->op.mod.message, "msDS-IntId")) {
1155                 if (!ldb_request_get_control(req, DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
1156                         return LDB_ERR_CONSTRAINT_VIOLATION;
1157                 }
1158         }
1159
1160         ac = samldb_ctx_init(module, req);
1161         if (ac == NULL) {
1162                 return ldb_operr(ldb);
1163         }
1164
1165         /* TODO: do not modify original request, create a new one */
1166
1167         el = ldb_msg_find_element(req->op.mod.message, "groupType");
1168         if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) && el->num_values == 1) {
1169                 uint32_t group_type;
1170
1171                 req->op.mod.message = msg = ldb_msg_copy_shallow(req,
1172                         req->op.mod.message);
1173
1174                 group_type = strtoul((const char *)el->values[0].data, NULL, 0);
1175                 account_type =  ds_gtype2atype(group_type);
1176                 ret = samdb_msg_add_uint(ldb, msg, msg,
1177                                          "sAMAccountType",
1178                                          account_type);
1179                 if (ret != LDB_SUCCESS) {
1180                         return ret;
1181                 }
1182                 el2 = ldb_msg_find_element(msg, "sAMAccountType");
1183                 el2->flags = LDB_FLAG_MOD_REPLACE;
1184         }
1185         if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE)) {
1186                 return LDB_ERR_UNWILLING_TO_PERFORM;
1187         }
1188
1189         el = ldb_msg_find_element(req->op.mod.message, "primaryGroupID");
1190         if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) && el->num_values == 1) {
1191                 req->op.mod.message = ac->msg = ldb_msg_copy_shallow(req,
1192                         req->op.mod.message);
1193
1194                 ret = samldb_prim_group_change(ac);
1195                 if (ret != LDB_SUCCESS) {
1196                         return ret;
1197                 }
1198         }
1199         if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE)) {
1200                 return LDB_ERR_UNWILLING_TO_PERFORM;
1201         }
1202
1203         el = ldb_msg_find_element(req->op.mod.message, "userAccountControl");
1204         if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_REPLACE) && el->num_values == 1) {
1205                 uint32_t user_account_control;
1206
1207                 req->op.mod.message = msg = ldb_msg_copy_shallow(req,
1208                         req->op.mod.message);
1209
1210                 user_account_control = strtoul((const char *)el->values[0].data,
1211                         NULL, 0);
1212                 account_type = ds_uf2atype(user_account_control);
1213                 ret = samdb_msg_add_uint(ldb, msg, msg,
1214                                          "sAMAccountType",
1215                                          account_type);
1216                 if (ret != LDB_SUCCESS) {
1217                         return ret;
1218                 }
1219                 el2 = ldb_msg_find_element(msg, "sAMAccountType");
1220                 el2->flags = LDB_FLAG_MOD_REPLACE;
1221
1222                 if (user_account_control & (UF_SERVER_TRUST_ACCOUNT | UF_PARTIAL_SECRETS_ACCOUNT)) {
1223                         ret = samdb_msg_add_string(ldb, msg, msg,
1224                                                    "isCriticalSystemObject", "TRUE");
1225                         if (ret != LDB_SUCCESS) {
1226                                 return ret;
1227                         }
1228                         el2 = ldb_msg_find_element(msg, "isCriticalSystemObject");
1229                         el2->flags = LDB_FLAG_MOD_REPLACE;
1230
1231                         /* DCs have primaryGroupID of DOMAIN_RID_DCS */
1232                         if (!ldb_msg_find_element(msg, "primaryGroupID")) {
1233                                 uint32_t rid;
1234                                 if (user_account_control & UF_SERVER_TRUST_ACCOUNT) {
1235                                         rid = DOMAIN_RID_DCS;
1236                                 } else {
1237                                         /* read-only DC */
1238                                         rid = DOMAIN_RID_READONLY_DCS;
1239                                 }
1240                                 ret = samdb_msg_add_uint(ldb, msg, msg,
1241                                                          "primaryGroupID", rid);
1242                                 if (ret != LDB_SUCCESS) {
1243                                         return ret;
1244                                 }
1245                                 el2 = ldb_msg_find_element(msg, "primaryGroupID");
1246                                 el2->flags = LDB_FLAG_MOD_REPLACE;
1247                         }
1248                 }
1249         }
1250         if (el && (LDB_FLAG_MOD_TYPE(el->flags) == LDB_FLAG_MOD_DELETE)) {
1251                 return LDB_ERR_UNWILLING_TO_PERFORM;
1252         }
1253
1254         el = ldb_msg_find_element(req->op.mod.message, "member");
1255         if (el && el->flags & (LDB_FLAG_MOD_ADD|LDB_FLAG_MOD_REPLACE) && el->num_values == 1) {
1256                 req->op.mod.message = ac->msg = ldb_msg_copy_shallow(req,
1257                         req->op.mod.message);
1258
1259                 ret = samldb_member_check(ac);
1260                 if (ret != LDB_SUCCESS) {
1261                         return ret;
1262                 }
1263         }
1264
1265         return ldb_next_request(module, req);
1266 }
1267
1268 /* delete */
1269
1270 static int samldb_prim_group_users_check(struct samldb_ctx *ac)
1271 {
1272         struct ldb_context *ldb;
1273         struct dom_sid *sid;
1274         uint32_t rid;
1275         NTSTATUS status;
1276         int count;
1277
1278         ldb = ldb_module_get_ctx(ac->module);
1279
1280         /* Finds out the SID/RID of the SAM object */
1281         sid = samdb_search_dom_sid(ldb, ac, ac->req->op.del.dn, "objectSID",
1282                                    NULL);
1283         if (sid == NULL) {
1284                 /* No SID - it might not be a SAM object - therefore ok */
1285                 return LDB_SUCCESS;
1286         }
1287         status = dom_sid_split_rid(ac, sid, NULL, &rid);
1288         if (!NT_STATUS_IS_OK(status)) {
1289                 return ldb_operr(ldb);
1290         }
1291         if (rid == 0) {
1292                 /* Special object (security principal?) */
1293                 return LDB_SUCCESS;
1294         }
1295
1296         /* Deny delete requests from groups which are primary ones */
1297         count = samdb_search_count(ldb, NULL,
1298                                    "(&(primaryGroupID=%u)(objectClass=user))",
1299                                    rid);
1300         if (count < 0) {
1301                 return ldb_operr(ldb);
1302         }
1303         if (count > 0) {
1304                 return LDB_ERR_ENTRY_ALREADY_EXISTS;
1305         }
1306
1307         return LDB_SUCCESS;
1308 }
1309
1310 static int samldb_delete(struct ldb_module *module, struct ldb_request *req)
1311 {
1312         struct samldb_ctx *ac;
1313         int ret;
1314
1315         if (ldb_dn_is_special(req->op.del.dn)) {
1316                 /* do not manipulate our control entries */
1317                 return ldb_next_request(module, req);
1318         }
1319
1320         ac = samldb_ctx_init(module, req);
1321         if (ac == NULL)
1322                 return ldb_operr(ldb_module_get_ctx(module));
1323
1324         ret = samldb_prim_group_users_check(ac);
1325         if (ret != LDB_SUCCESS) {
1326                 return ret;
1327         }
1328
1329         return ldb_next_request(module, req);
1330 }
1331
1332 /* extended */
1333
1334 static int samldb_extended_allocate_rid_pool(struct ldb_module *module, struct ldb_request *req)
1335 {
1336         struct ldb_context *ldb = ldb_module_get_ctx(module);
1337         struct dsdb_fsmo_extended_op *exop;
1338         int ret;
1339
1340         exop = talloc_get_type(req->op.extended.data, struct dsdb_fsmo_extended_op);
1341         if (!exop) {
1342                 ldb_debug(ldb, LDB_DEBUG_FATAL, "samldb_extended_allocate_rid_pool: invalid extended data\n");
1343                 return LDB_ERR_PROTOCOL_ERROR;
1344         }
1345
1346         ret = ridalloc_allocate_rid_pool_fsmo(module, exop);
1347         if (ret != LDB_SUCCESS) {
1348                 return ret;
1349         }
1350
1351         return ldb_module_done(req, NULL, NULL, LDB_SUCCESS);
1352 }
1353
1354 static int samldb_extended(struct ldb_module *module, struct ldb_request *req)
1355 {
1356         if (strcmp(req->op.extended.oid, DSDB_EXTENDED_ALLOCATE_RID_POOL) == 0) {
1357                 return samldb_extended_allocate_rid_pool(module, req);
1358         }
1359
1360         return ldb_next_request(module, req);
1361 }
1362
1363
1364 _PUBLIC_ const struct ldb_module_ops ldb_samldb_module_ops = {
1365         .name          = "samldb",
1366         .add           = samldb_add,
1367         .modify        = samldb_modify,
1368         .del           = samldb_delete,
1369         .extended      = samldb_extended
1370 };
1371