source4/rpc_server/drsuapi/getncchanges.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    implement the DSGetNCChanges call
   5
   6    Copyright (C) Anatoliy Atanasov 2009
   7    Copyright (C) Andrew Tridgell 2009
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23 #include "includes.h"
  24 #include "rpc_server/dcerpc_server.h"
  25 #include "dsdb/samdb/samdb.h"
  26 #include "param/param.h"
  27 #include "librpc/gen_ndr/ndr_drsblobs.h"
  28 #include "librpc/gen_ndr/ndr_drsuapi.h"
  29 #include "librpc/gen_ndr/ndr_security.h"
  30 #include "libcli/security/security.h"
  31 #include "libcli/security/session.h"
  32 #include "rpc_server/drsuapi/dcesrv_drsuapi.h"
  33 #include "rpc_server/dcerpc_server_proto.h"
  34 #include "../libcli/drsuapi/drsuapi.h"
  35 #include "lib/util/binsearch.h"
  36 #include "lib/util/tsort.h"
  37 #include "auth/session.h"
  38 #include "dsdb/common/util.h"
  39
  40 /*
  41   build a DsReplicaObjectIdentifier from a ldb msg
  42  */
  43 static struct drsuapi_DsReplicaObjectIdentifier *get_object_identifier(TALLOC_CTX *mem_ctx,
  44                                                                        struct ldb_message *msg)
  45 {
  46         struct drsuapi_DsReplicaObjectIdentifier *identifier;
  47         struct dom_sid *sid;
  48
  49         identifier = talloc(mem_ctx, struct drsuapi_DsReplicaObjectIdentifier);
  50         if (identifier == NULL) {
  51                 return NULL;
  52         }
  53
  54         identifier->dn = ldb_dn_alloc_linearized(identifier, msg->dn);
  55         identifier->guid = samdb_result_guid(msg, "objectGUID");
  56
  57         sid = samdb_result_dom_sid(identifier, msg, "objectSid");
  58         if (sid) {
  59                 identifier->sid = *sid;
  60         } else {
  61                 ZERO_STRUCT(identifier->sid);
  62         }
  63         return identifier;
  64 }
  65
  66 static int udv_compare(const struct GUID *guid1, struct GUID guid2)
  67 {
  68         return GUID_compare(guid1, &guid2);
  69 }
  70
  71 /*
  72   see if we can filter an attribute using the uptodateness_vector
  73  */
  74 static bool udv_filter(const struct drsuapi_DsReplicaCursorCtrEx *udv,
  75                        const struct GUID *originating_invocation_id,
  76                        uint64_t originating_usn)
  77 {
  78         const struct drsuapi_DsReplicaCursor *c;
  79         if (udv == NULL) return false;
  80         BINARY_ARRAY_SEARCH(udv->cursors, udv->count, source_dsa_invocation_id,
  81                             originating_invocation_id, udv_compare, c);
  82         if (c && originating_usn <= c->highest_usn) {
  83                 return true;
  84         }
  85         return false;
  86
  87 }
  88
  89 static int attid_cmp(enum drsuapi_DsAttributeId a1, enum drsuapi_DsAttributeId a2)
  90 {
  91         if (a1 == a2) return 0;
  92         return ((uint32_t)a1) > ((uint32_t)a2) ? 1 : -1;
  93 }
  94
  95 /*
  96   check if an attribute is in a partial_attribute_set
  97  */
  98 static bool check_partial_attribute_set(const struct dsdb_attribute *sa,
  99                                         struct drsuapi_DsPartialAttributeSet *pas)
 100 {
 101         enum drsuapi_DsAttributeId *result;
 102         BINARY_ARRAY_SEARCH_V(pas->attids, pas->num_attids, (enum drsuapi_DsAttributeId)sa->attributeID_id,
 103                               attid_cmp, result);
 104         return result != NULL;
 105 }
 106
 107
 108 /*
 109   drsuapi_DsGetNCChanges for one object
 110 */
 111 static WERROR get_nc_changes_build_object(struct drsuapi_DsReplicaObjectListItemEx *obj,
 112                                           struct ldb_message *msg,
 113                                           struct ldb_context *sam_ctx,
 114                                           struct ldb_dn *ncRoot_dn,
 115                                           bool   is_schema_nc,
 116                                           struct dsdb_schema *schema,
 117                                           DATA_BLOB *session_key,
 118                                           uint64_t highest_usn,
 119                                           uint32_t replica_flags,
 120                                           struct drsuapi_DsPartialAttributeSet *partial_attribute_set,
 121                                           struct drsuapi_DsReplicaCursorCtrEx *uptodateness_vector,
 122                                           enum drsuapi_DsExtendedOperation extended_op)
 123 {
 124         const struct ldb_val *md_value;
 125         uint32_t i, n;
 126         struct replPropertyMetaDataBlob md;
 127         uint32_t rid = 0;
 128         enum ndr_err_code ndr_err;
 129         uint32_t *attids;
 130         const char *rdn;
 131         const struct dsdb_attribute *rdn_sa;
 132         unsigned int instanceType;
 133         struct dsdb_syntax_ctx syntax_ctx;
 134
 135         /* make dsdb sytanx context for conversions */
 136         dsdb_syntax_ctx_init(&syntax_ctx, sam_ctx, schema);
 137         syntax_ctx.is_schema_nc = is_schema_nc;
 138
 139         instanceType = ldb_msg_find_attr_as_uint(msg, "instanceType", 0);
 140         if (instanceType & INSTANCE_TYPE_IS_NC_HEAD) {
 141                 obj->is_nc_prefix = true;
 142                 obj->parent_object_guid = NULL;
 143         } else {
 144                 obj->is_nc_prefix = false;
 145                 obj->parent_object_guid = talloc(obj, struct GUID);
 146                 if (obj->parent_object_guid == NULL) {
 147                         return WERR_DS_DRA_INTERNAL_ERROR;
 148                 }
 149                 *obj->parent_object_guid = samdb_result_guid(msg, "parentGUID");
 150                 if (GUID_all_zero(obj->parent_object_guid)) {
 151                         DEBUG(0,(__location__ ": missing parentGUID for %s\n",
 152                                  ldb_dn_get_linearized(msg->dn)));
 153                         return WERR_DS_DRA_INTERNAL_ERROR;
 154                 }
 155         }
 156         obj->next_object = NULL;
 157
 158         md_value = ldb_msg_find_ldb_val(msg, "replPropertyMetaData");
 159         if (!md_value) {
 160                 /* nothing to send */
 161                 return WERR_OK;
 162         }
 163
 164         if (instanceType & INSTANCE_TYPE_UNINSTANT) {
 165                 /* don't send uninstantiated objects */
 166                 return WERR_OK;
 167         }
 168
 169         ndr_err = ndr_pull_struct_blob(md_value, obj, &md,
 170                                        (ndr_pull_flags_fn_t)ndr_pull_replPropertyMetaDataBlob);
 171         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 172                 return WERR_DS_DRA_INTERNAL_ERROR;
 173         }
 174
 175         if (md.version != 1) {
 176                 return WERR_DS_DRA_INTERNAL_ERROR;
 177         }
 178
 179         rdn = ldb_dn_get_rdn_name(msg->dn);
 180         if (rdn == NULL) {
 181                 DEBUG(0,(__location__ ": No rDN for %s\n", ldb_dn_get_linearized(msg->dn)));
 182                 return WERR_DS_DRA_INTERNAL_ERROR;
 183         }
 184
 185         rdn_sa = dsdb_attribute_by_lDAPDisplayName(schema, rdn);
 186         if (rdn_sa == NULL) {
 187                 DEBUG(0,(__location__ ": Can't find dsds_attribute for rDN %s in %s\n",
 188                          rdn, ldb_dn_get_linearized(msg->dn)));
 189                 return WERR_DS_DRA_INTERNAL_ERROR;
 190         }
 191
 192         obj->meta_data_ctr = talloc(obj, struct drsuapi_DsReplicaMetaDataCtr);
 193         attids = talloc_array(obj, uint32_t, md.ctr.ctr1.count);
 194
 195         obj->object.identifier = get_object_identifier(obj, msg);
 196         if (obj->object.identifier == NULL) {
 197                 return WERR_NOMEM;
 198         }
 199         dom_sid_split_rid(NULL, &obj->object.identifier->sid, NULL, &rid);
 200
 201         obj->meta_data_ctr->meta_data = talloc_array(obj, struct drsuapi_DsReplicaMetaData, md.ctr.ctr1.count);
 202         for (n=i=0; i<md.ctr.ctr1.count; i++) {
 203                 const struct dsdb_attribute *sa;
 204                 bool force_attribute = false;
 205
 206                 /* if the attribute has not changed, and it is not the
 207                    instanceType then don't include it */
 208                 if (md.ctr.ctr1.array[i].local_usn < highest_usn &&
 209                     extended_op != DRSUAPI_EXOP_REPL_SECRET &&
 210                     md.ctr.ctr1.array[i].attid != DRSUAPI_ATTID_instanceType) continue;
 211
 212                 /* don't include the rDN */
 213                 if (md.ctr.ctr1.array[i].attid == rdn_sa->attributeID_id) continue;
 214
 215                 sa = dsdb_attribute_by_attributeID_id(schema, md.ctr.ctr1.array[i].attid);
 216                 if (!sa) {
 217                         DEBUG(0,(__location__ ": Failed to find attribute in schema for attrid %u mentioned in replPropertyMetaData of %s\n",
 218                                  (unsigned int)md.ctr.ctr1.array[i].attid,
 219                                  ldb_dn_get_linearized(msg->dn)));
 220                         return WERR_DS_DRA_INTERNAL_ERROR;
 221                 }
 222
 223                 if (sa->linkID) {
 224                         struct ldb_message_element *el;
 225                         el = ldb_msg_find_element(msg, sa->lDAPDisplayName);
 226                         if (el && el->num_values && dsdb_dn_is_upgraded_link_val(&el->values[0])) {
 227                                 /* don't send upgraded links inline */
 228                                 continue;
 229                         }
 230                 }
 231
 232                 if (extended_op == DRSUAPI_EXOP_REPL_SECRET &&
 233                     !dsdb_attr_in_rodc_fas(sa)) {
 234                         force_attribute = true;
 235                         DEBUG(4,("Forcing attribute %s in %s\n",
 236                                  sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn)));
 237                 }
 238
 239                 /* filter by uptodateness_vector */
 240                 if (md.ctr.ctr1.array[i].attid != DRSUAPI_ATTID_instanceType &&
 241                     !force_attribute &&
 242                     udv_filter(uptodateness_vector,
 243                                &md.ctr.ctr1.array[i].originating_invocation_id,
 244                                md.ctr.ctr1.array[i].originating_usn)) {
 245                         continue;
 246                 }
 247
 248                 /* filter by partial_attribute_set */
 249                 if (partial_attribute_set && !check_partial_attribute_set(sa, partial_attribute_set)) {
 250                         continue;
 251                 }
 252
 253                 obj->meta_data_ctr->meta_data[n].originating_change_time = md.ctr.ctr1.array[i].originating_change_time;
 254                 obj->meta_data_ctr->meta_data[n].version = md.ctr.ctr1.array[i].version;
 255                 obj->meta_data_ctr->meta_data[n].originating_invocation_id = md.ctr.ctr1.array[i].originating_invocation_id;
 256                 obj->meta_data_ctr->meta_data[n].originating_usn = md.ctr.ctr1.array[i].originating_usn;
 257                 attids[n] = md.ctr.ctr1.array[i].attid;
 258                 n++;
 259         }
 260
 261         /* ignore it if its an empty change. Note that renames always
 262          * change the 'name' attribute, so they won't be ignored by
 263          * this */
 264         if (n == 0 ||
 265             (n == 1 && attids[0] == DRSUAPI_ATTID_instanceType)) {
 266                 talloc_free(obj->meta_data_ctr);
 267                 obj->meta_data_ctr = NULL;
 268                 return WERR_OK;
 269         }
 270
 271         obj->meta_data_ctr->count = n;
 272
 273         obj->object.flags = DRSUAPI_DS_REPLICA_OBJECT_FROM_MASTER;
 274         obj->object.attribute_ctr.num_attributes = obj->meta_data_ctr->count;
 275         obj->object.attribute_ctr.attributes = talloc_array(obj, struct drsuapi_DsReplicaAttribute,
 276                                                             obj->object.attribute_ctr.num_attributes);
 277
 278         /*
 279          * Note that the meta_data array and the attributes array must
 280          * be the same size and in the same order
 281          */
 282         for (i=0; i<obj->object.attribute_ctr.num_attributes; i++) {
 283                 struct ldb_message_element *el;
 284                 WERROR werr;
 285                 const struct dsdb_attribute *sa;
 286
 287                 sa = dsdb_attribute_by_attributeID_id(schema, attids[i]);
 288                 if (!sa) {
 289                         DEBUG(0,("Unable to find attributeID %u in schema\n", attids[i]));
 290                         return WERR_DS_DRA_INTERNAL_ERROR;
 291                 }
 292
 293                 el = ldb_msg_find_element(msg, sa->lDAPDisplayName);
 294                 if (el == NULL) {
 295                         /* this happens for attributes that have been removed */
 296                         DEBUG(5,("No element '%s' for attributeID %u in message\n",
 297                                  sa->lDAPDisplayName, attids[i]));
 298                         ZERO_STRUCT(obj->object.attribute_ctr.attributes[i]);
 299                         obj->object.attribute_ctr.attributes[i].attid =
 300                                         dsdb_attribute_get_attid(sa, syntax_ctx.is_schema_nc);
 301                 } else {
 302                         werr = sa->syntax->ldb_to_drsuapi(&syntax_ctx, sa, el, obj,
 303                                                           &obj->object.attribute_ctr.attributes[i]);
 304                         if (!W_ERROR_IS_OK(werr)) {
 305                                 DEBUG(0,("Unable to convert %s to DRS object - %s\n",
 306                                          sa->lDAPDisplayName, win_errstr(werr)));
 307                                 return werr;
 308                         }
 309                         /* if DRSUAPI_DRS_SPECIAL_SECRET_PROCESSING is set
 310                          * check if attribute is secret and send a null value
 311                          */
 312                         if (replica_flags & DRSUAPI_DRS_SPECIAL_SECRET_PROCESSING) {
 313                                 drsuapi_process_secret_attribute(&obj->object.attribute_ctr.attributes[i],
 314                                                                  &obj->meta_data_ctr->meta_data[i]);
 315                         }
 316                         /* some attributes needs to be encrypted
 317                            before being sent */
 318                         werr = drsuapi_encrypt_attribute(obj, session_key, rid,
 319                                                          &obj->object.attribute_ctr.attributes[i]);
 320                         if (!W_ERROR_IS_OK(werr)) {
 321                                 DEBUG(0,("Unable to encrypt %s in DRS object - %s\n",
 322                                          sa->lDAPDisplayName, win_errstr(werr)));
 323                                 return werr;
 324                         }
 325                 }
 326         }
 327
 328         return WERR_OK;
 329 }
 330
 331
 332 /*
 333   add one linked attribute from an object to the list of linked
 334   attributes in a getncchanges request
 335  */
 336 static WERROR get_nc_changes_add_la(TALLOC_CTX *mem_ctx,
 337                                     struct ldb_context *sam_ctx,
 338                                     const struct dsdb_schema *schema,
 339                                     const struct dsdb_attribute *sa,
 340                                     struct ldb_message *msg,
 341                                     struct dsdb_dn *dsdb_dn,
 342                                     struct drsuapi_DsReplicaLinkedAttribute **la_list,
 343                                     uint32_t *la_count)
 344 {
 345         struct drsuapi_DsReplicaLinkedAttribute *la;
 346         bool active;
 347         NTSTATUS status;
 348         WERROR werr;
 349
 350         (*la_list) = talloc_realloc(mem_ctx, *la_list, struct drsuapi_DsReplicaLinkedAttribute, (*la_count)+1);
 351         W_ERROR_HAVE_NO_MEMORY(*la_list);
 352
 353         la = &(*la_list)[*la_count];
 354
 355         la->identifier = get_object_identifier(*la_list, msg);
 356         W_ERROR_HAVE_NO_MEMORY(la->identifier);
 357
 358         active = (dsdb_dn_rmd_flags(dsdb_dn->dn) & DSDB_RMD_FLAG_DELETED) == 0;
 359
 360         if (!active) {
 361                 /* We have to check that the inactive link still point to an existing object */
 362                 struct GUID guid;
 363                 struct ldb_dn *tdn;
 364                 int ret;
 365                 const char *v;
 366
 367                 v = ldb_msg_find_attr_as_string(msg, "isDeleted", "false");
 368                 if (strncasecmp(v, "true", 4) == 0) {
 369                         /*
 370                           * Note: we skip the transmition of the deleted link even if the other part used to
 371                           * know about it because when we transmit the deletion of the object, the link will
 372                           * be deleted too due to deletion of object where link points and Windows do so.
 373                           */
 374                         if (dsdb_functional_level(sam_ctx) >= DS_DOMAIN_FUNCTION_2008_R2) {
 375                                 v = ldb_msg_find_attr_as_string(msg, "isRecycled", "true");
 376                                 /*
 377                                  * On Windows 2008R2 isRecycled is always present even if FL or DL are < FL 2K8R2
 378                                  * if it join an existing domain with deleted objets, it firsts impose to have a
 379                                  * schema with the is-Recycled object and for all deleted objects it adds the isRecycled
 380                                  * either during initial replication or after the getNCChanges.
 381                                  * Behavior of samba has been changed to always have this attribute if it's present in the schema.
 382                                  *
 383                                  * So if FL <2K8R2 isRecycled might be here or not but we don't care, it's meaning less.
 384                                  * If FL >=2K8R2 we are sure that this attribute will be here.
 385                                  * For this kind of forest level we do not return the link if the object is recycled
 386                                  * (isRecycled = true).
 387                                  */
 388                                 if (strncasecmp(v, "true", 4) == 0) {
 389                                         DEBUG(2, (" object %s is recycled, not returning linked attribute !\n",
 390                                                                 ldb_dn_get_linearized(msg->dn)));
 391                                         return WERR_OK;
 392                                 }
 393                         } else {
 394                                 return WERR_OK;
 395                         }
 396                 }
 397                 status = dsdb_get_extended_dn_guid(dsdb_dn->dn, &guid, "GUID");
 398                 if (!NT_STATUS_IS_OK(status)) {
 399                         DEBUG(0,(__location__ " Unable to extract GUID in linked attribute '%s' in '%s'\n",
 400                                 sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn)));
 401                         return ntstatus_to_werror(status);
 402                 }
 403                 ret = dsdb_find_dn_by_guid(sam_ctx, mem_ctx, &guid, &tdn);
 404                 if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 405                         DEBUG(2, (" Search of guid %s returned 0 objects, skipping it !\n",
 406                                                 GUID_string(mem_ctx, &guid)));
 407                         return WERR_OK;
 408                 } else if (ret != LDB_SUCCESS) {
 409                         DEBUG(0, (__location__ " Search of guid %s failed with error code %d\n",
 410                                                 GUID_string(mem_ctx, &guid),
 411                                                 ret));
 412                         return WERR_OK;
 413                 }
 414         }
 415         la->attid = sa->attributeID_id;
 416         la->flags = active?DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE:0;
 417
 418         status = dsdb_get_extended_dn_uint32(dsdb_dn->dn, &la->meta_data.version, "RMD_VERSION");
 419         if (!NT_STATUS_IS_OK(status)) {
 420                 DEBUG(0,(__location__ " No RMD_VERSION in linked attribute '%s' in '%s'\n",
 421                          sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn)));
 422                 return ntstatus_to_werror(status);
 423         }
 424         status = dsdb_get_extended_dn_nttime(dsdb_dn->dn, &la->meta_data.originating_change_time, "RMD_CHANGETIME");
 425         if (!NT_STATUS_IS_OK(status)) {
 426                 DEBUG(0,(__location__ " No RMD_CHANGETIME in linked attribute '%s' in '%s'\n",
 427                          sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn)));
 428                 return ntstatus_to_werror(status);
 429         }
 430         status = dsdb_get_extended_dn_guid(dsdb_dn->dn, &la->meta_data.originating_invocation_id, "RMD_INVOCID");
 431         if (!NT_STATUS_IS_OK(status)) {
 432                 DEBUG(0,(__location__ " No RMD_INVOCID in linked attribute '%s' in '%s'\n",
 433                          sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn)));
 434                 return ntstatus_to_werror(status);
 435         }
 436         status = dsdb_get_extended_dn_uint64(dsdb_dn->dn, &la->meta_data.originating_usn, "RMD_ORIGINATING_USN");
 437         if (!NT_STATUS_IS_OK(status)) {
 438                 DEBUG(0,(__location__ " No RMD_ORIGINATING_USN in linked attribute '%s' in '%s'\n",
 439                          sa->lDAPDisplayName, ldb_dn_get_linearized(msg->dn)));
 440                 return ntstatus_to_werror(status);
 441         }
 442
 443         status = dsdb_get_extended_dn_nttime(dsdb_dn->dn, &la->originating_add_time, "RMD_ADDTIME");
 444         if (!NT_STATUS_IS_OK(status)) {
 445                 /* this is possible for upgraded links */
 446                 la->originating_add_time = la->meta_data.originating_change_time;
 447         }
 448
 449         werr = dsdb_dn_la_to_blob(sam_ctx, sa, schema, *la_list, dsdb_dn, &la->value.blob);
 450         W_ERROR_NOT_OK_RETURN(werr);
 451
 452         (*la_count)++;
 453         return WERR_OK;
 454 }
 455
 456
 457 /*
 458   add linked attributes from an object to the list of linked
 459   attributes in a getncchanges request
 460  */
 461 static WERROR get_nc_changes_add_links(struct ldb_context *sam_ctx,
 462                                        TALLOC_CTX *mem_ctx,
 463                                        struct ldb_dn *ncRoot_dn,
 464                                        struct dsdb_schema *schema,
 465                                        uint64_t highest_usn,
 466                                        uint32_t replica_flags,
 467                                        struct ldb_message *msg,
 468                                        struct drsuapi_DsReplicaLinkedAttribute **la_list,
 469                                        uint32_t *la_count,
 470                                        struct drsuapi_DsReplicaCursorCtrEx *uptodateness_vector)
 471 {
 472         unsigned int i;
 473         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 474         uint64_t uSNChanged = ldb_msg_find_attr_as_int(msg, "uSNChanged", -1);
 475
 476         for (i=0; i<msg->num_elements; i++) {
 477                 struct ldb_message_element *el = &msg->elements[i];
 478                 const struct dsdb_attribute *sa;
 479                 unsigned int j;
 480
 481                 sa = dsdb_attribute_by_lDAPDisplayName(schema, el->name);
 482
 483                 if (!sa || sa->linkID == 0 || (sa->linkID & 1)) {
 484                         /* we only want forward links */
 485                         continue;
 486                 }
 487
 488                 if (el->num_values && !dsdb_dn_is_upgraded_link_val(&el->values[0])) {
 489                         /* its an old style link, it will have been
 490                          * sent in the main replication data */
 491                         continue;
 492                 }
 493
 494                 for (j=0; j<el->num_values; j++) {
 495                         struct dsdb_dn *dsdb_dn;
 496                         uint64_t local_usn;
 497                         NTSTATUS status;
 498                         WERROR werr;
 499
 500                         dsdb_dn = dsdb_dn_parse(tmp_ctx, sam_ctx, &el->values[j], sa->syntax->ldap_oid);
 501                         if (dsdb_dn == NULL) {
 502                                 DEBUG(1,(__location__ ": Failed to parse DN for %s in %s\n",
 503                                          el->name, ldb_dn_get_linearized(msg->dn)));
 504                                 talloc_free(tmp_ctx);
 505                                 return WERR_DS_DRA_INTERNAL_ERROR;
 506                         }
 507
 508                         status = dsdb_get_extended_dn_uint64(dsdb_dn->dn, &local_usn, "RMD_LOCAL_USN");
 509                         if (!NT_STATUS_IS_OK(status)) {
 510                                 /* this can happen for attributes
 511                                    given to us with old style meta
 512                                    data */
 513                                 continue;
 514                         }
 515
 516                         if (local_usn > uSNChanged) {
 517                                 DEBUG(1,(__location__ ": uSNChanged less than RMD_LOCAL_USN for %s on %s\n",
 518                                          el->name, ldb_dn_get_linearized(msg->dn)));
 519                                 talloc_free(tmp_ctx);
 520                                 return WERR_DS_DRA_INTERNAL_ERROR;
 521                         }
 522
 523                         if (local_usn < highest_usn) {
 524                                 continue;
 525                         }
 526
 527                         werr = get_nc_changes_add_la(mem_ctx, sam_ctx, schema, sa, msg,
 528                                                      dsdb_dn, la_list, la_count);
 529                         if (!W_ERROR_IS_OK(werr)) {
 530                                 talloc_free(tmp_ctx);
 531                                 return werr;
 532                         }
 533                 }
 534         }
 535
 536         talloc_free(tmp_ctx);
 537         return WERR_OK;
 538 }
 539
 540 /*
 541   fill in the cursors return based on the replUpToDateVector for the ncRoot_dn
 542  */
 543 static WERROR get_nc_changes_udv(struct ldb_context *sam_ctx,
 544                                  struct ldb_dn *ncRoot_dn,
 545                                  struct drsuapi_DsReplicaCursor2CtrEx *udv)
 546 {
 547         int ret;
 548
 549         udv->version = 2;
 550         udv->reserved1 = 0;
 551         udv->reserved2 = 0;
 552
 553         ret = dsdb_load_udv_v2(sam_ctx, ncRoot_dn, udv, &udv->cursors, &udv->count);
 554         if (ret != LDB_SUCCESS) {
 555                 DEBUG(0,(__location__ ": Failed to load UDV for %s - %s\n",
 556                          ldb_dn_get_linearized(ncRoot_dn), ldb_errstring(sam_ctx)));
 557                 return WERR_DS_DRA_INTERNAL_ERROR;
 558         }
 559
 560         return WERR_OK;
 561 }
 562
 563
 564 /* comparison function for linked attributes - see CompareLinks() in
 565  * MS-DRSR section 4.1.10.5.17 */
 566 static int linked_attribute_compare(const struct drsuapi_DsReplicaLinkedAttribute *la1,
 567                                     const struct drsuapi_DsReplicaLinkedAttribute *la2,
 568                                     struct ldb_context *sam_ctx)
 569 {
 570         int c;
 571         WERROR werr;
 572         TALLOC_CTX *tmp_ctx;
 573         const struct dsdb_schema *schema;
 574         const struct dsdb_attribute *schema_attrib;
 575         struct dsdb_dn *dn1, *dn2;
 576         struct GUID guid1, guid2;
 577         NTSTATUS status;
 578
 579         c = GUID_compare(&la1->identifier->guid,
 580                          &la2->identifier->guid);
 581         if (c != 0) return c;
 582
 583         if (la1->attid != la2->attid) {
 584                 return la1->attid < la2->attid? -1:1;
 585         }
 586
 587         if ((la1->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE) !=
 588             (la2->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE)) {
 589                 return (la1->flags & DRSUAPI_DS_LINKED_ATTRIBUTE_FLAG_ACTIVE)? 1:-1;
 590         }
 591
 592         /* we need to get the target GUIDs to compare */
 593         tmp_ctx = talloc_new(sam_ctx);
 594
 595         schema = dsdb_get_schema(sam_ctx, tmp_ctx);
 596         schema_attrib = dsdb_attribute_by_attributeID_id(schema, la1->attid);
 597
 598         werr = dsdb_dn_la_from_blob(sam_ctx, schema_attrib, schema, tmp_ctx, la1->value.blob, &dn1);
 599         if (!W_ERROR_IS_OK(werr)) {
 600                 DEBUG(0,(__location__ ": Bad la1 blob in sort\n"));
 601                 talloc_free(tmp_ctx);
 602                 return 0;
 603         }
 604
 605         werr = dsdb_dn_la_from_blob(sam_ctx, schema_attrib, schema, tmp_ctx, la2->value.blob, &dn2);
 606         if (!W_ERROR_IS_OK(werr)) {
 607                 DEBUG(0,(__location__ ": Bad la2 blob in sort\n"));
 608                 talloc_free(tmp_ctx);
 609                 return 0;
 610         }
 611
 612         status = dsdb_get_extended_dn_guid(dn1->dn, &guid1, "GUID");
 613         if (!NT_STATUS_IS_OK(status)) {
 614                 DEBUG(0,(__location__ ": Bad la1 guid in sort\n"));
 615                 talloc_free(tmp_ctx);
 616                 return 0;
 617         }
 618         status = dsdb_get_extended_dn_guid(dn2->dn, &guid2, "GUID");
 619         if (!NT_STATUS_IS_OK(status)) {
 620                 DEBUG(0,(__location__ ": Bad la2 guid in sort\n"));
 621                 talloc_free(tmp_ctx);
 622                 return 0;
 623         }
 624
 625         talloc_free(tmp_ctx);
 626
 627         return GUID_compare(&guid1, &guid2);
 628 }
 629
 630
 631 /*
 632   sort the objects we send by tree order
 633  */
 634 static int site_res_cmp_parent_order(struct ldb_message **m1, struct ldb_message **m2)
 635 {
 636         return ldb_dn_compare((*m2)->dn, (*m1)->dn);
 637 }
 638
 639 /*
 640   sort the objects we send first by uSNChanged
 641  */
 642 static int site_res_cmp_usn_order(struct ldb_message **m1, struct ldb_message **m2)
 643 {
 644         unsigned usnchanged1, usnchanged2;
 645         unsigned cn1, cn2;
 646         cn1 = ldb_dn_get_comp_num((*m1)->dn);
 647         cn2 = ldb_dn_get_comp_num((*m2)->dn);
 648         if (cn1 != cn2) {
 649                 return cn1 > cn2 ? 1 : -1;
 650         }
 651         usnchanged1 = ldb_msg_find_attr_as_uint(*m1, "uSNChanged", 0);
 652         usnchanged2 = ldb_msg_find_attr_as_uint(*m2, "uSNChanged", 0);
 653         if (usnchanged1 == usnchanged2) {
 654                 return 0;
 655         }
 656         return usnchanged1 > usnchanged2 ? 1 : -1;
 657 }
 658
 659
 660 /*
 661   handle a DRSUAPI_EXOP_FSMO_RID_ALLOC call
 662  */
 663 static WERROR getncchanges_rid_alloc(struct drsuapi_bind_state *b_state,
 664                                      TALLOC_CTX *mem_ctx,
 665                                      struct drsuapi_DsGetNCChangesRequest10 *req10,
 666                                      struct drsuapi_DsGetNCChangesCtr6 *ctr6)
 667 {
 668         struct ldb_dn *rid_manager_dn, *fsmo_role_dn, *req_dn;
 669         int ret;
 670         struct ldb_context *ldb = b_state->sam_ctx;
 671         struct ldb_result *ext_res;
 672         struct ldb_dn *base_dn;
 673         struct dsdb_fsmo_extended_op *exop;
 674
 675         /*
 676           steps:
 677             - verify that the DN being asked for is the RID Manager DN
 678             - verify that we are the RID Manager
 679          */
 680
 681         /* work out who is the RID Manager */
 682         ret = samdb_rid_manager_dn(ldb, mem_ctx, &rid_manager_dn);
 683         if (ret != LDB_SUCCESS) {
 684                 DEBUG(0, (__location__ ": Failed to find RID Manager object - %s\n", ldb_errstring(ldb)));
 685                 return WERR_DS_DRA_INTERNAL_ERROR;
 686         }
 687
 688         req_dn = drs_ObjectIdentifier_to_dn(mem_ctx, ldb, req10->naming_context);
 689         if (!ldb_dn_validate(req_dn) ||
 690             ldb_dn_compare(req_dn, rid_manager_dn) != 0) {
 691                 /* that isn't the RID Manager DN */
 692                 DEBUG(0,(__location__ ": RID Alloc request for wrong DN %s\n",
 693                          drs_ObjectIdentifier_to_string(mem_ctx, req10->naming_context)));
 694                 ctr6->extended_ret = DRSUAPI_EXOP_ERR_MISMATCH;
 695                 return WERR_OK;
 696         }
 697
 698         /* find the DN of the RID Manager */
 699         ret = samdb_reference_dn(ldb, mem_ctx, rid_manager_dn, "fSMORoleOwner", &fsmo_role_dn);
 700         if (ret != LDB_SUCCESS) {
 701                 DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in RID Manager object - %s\n",
 702                          ldb_errstring(ldb)));
 703                 ctr6->extended_ret = DRSUAPI_EXOP_ERR_FSMO_NOT_OWNER;
 704                 return WERR_DS_DRA_INTERNAL_ERROR;
 705         }
 706
 707         if (ldb_dn_compare(samdb_ntds_settings_dn(ldb), fsmo_role_dn) != 0) {
 708                 /* we're not the RID Manager - go away */
 709                 DEBUG(0,(__location__ ": RID Alloc request when not RID Manager\n"));
 710                 ctr6->extended_ret = DRSUAPI_EXOP_ERR_FSMO_NOT_OWNER;
 711                 return WERR_OK;
 712         }
 713
 714         exop = talloc(mem_ctx, struct dsdb_fsmo_extended_op);
 715         W_ERROR_HAVE_NO_MEMORY(exop);
 716
 717         exop->fsmo_info = req10->fsmo_info;
 718         exop->destination_dsa_guid = req10->destination_dsa_guid;
 719
 720         ret = ldb_transaction_start(ldb);
 721         if (ret != LDB_SUCCESS) {
 722                 DEBUG(0,(__location__ ": Failed transaction start - %s\n",
 723                          ldb_errstring(ldb)));
 724                 return WERR_DS_DRA_INTERNAL_ERROR;
 725         }
 726
 727         /*
 728          * FIXME (kim): this is a temp hack to return just few object,
 729          * but not the whole domain NC.
 730          * We should remove this hack and implement a 'scope'
 731          * building function to return just the set of object
 732          * documented for DRSUAPI_EXOP_FSMO_RID_ALLOC extended_op
 733          */
 734         ldb_sequence_number(ldb, LDB_SEQ_HIGHEST_SEQ, &req10->highwatermark.highest_usn);
 735
 736         ret = ldb_extended(ldb, DSDB_EXTENDED_ALLOCATE_RID_POOL, exop, &ext_res);
 737         if (ret != LDB_SUCCESS) {
 738                 DEBUG(0,(__location__ ": Failed extended allocation RID pool operation - %s\n",
 739                          ldb_errstring(ldb)));
 740                 ldb_transaction_cancel(ldb);
 741                 return WERR_DS_DRA_INTERNAL_ERROR;
 742         }
 743
 744         ret = ldb_transaction_commit(ldb);
 745         if (ret != LDB_SUCCESS) {
 746                 DEBUG(0,(__location__ ": Failed transaction commit - %s\n",
 747                          ldb_errstring(ldb)));
 748                 return WERR_DS_DRA_INTERNAL_ERROR;
 749         }
 750
 751         talloc_free(ext_res);
 752
 753         base_dn = ldb_get_default_basedn(ldb);
 754
 755         DEBUG(2,("Allocated RID pool for server %s\n",
 756                  GUID_string(mem_ctx, &req10->destination_dsa_guid)));
 757
 758         ctr6->extended_ret = DRSUAPI_EXOP_ERR_SUCCESS;
 759
 760         return WERR_OK;
 761 }
 762
 763 /*
 764   return an array of SIDs from a ldb_message given an attribute name
 765   assumes the SIDs are in extended DN format
 766  */
 767 static WERROR samdb_result_sid_array_dn(struct ldb_context *sam_ctx,
 768                                         struct ldb_message *msg,
 769                                         TALLOC_CTX *mem_ctx,
 770                                         const char *attr,
 771                                         const struct dom_sid ***sids)
 772 {
 773         struct ldb_message_element *el;
 774         unsigned int i;
 775
 776         el = ldb_msg_find_element(msg, attr);
 777         if (!el) {
 778                 *sids = NULL;
 779                 return WERR_OK;
 780         }
 781
 782         (*sids) = talloc_array(mem_ctx, const struct dom_sid *, el->num_values + 1);
 783         W_ERROR_HAVE_NO_MEMORY(*sids);
 784
 785         for (i=0; i<el->num_values; i++) {
 786                 struct ldb_dn *dn = ldb_dn_from_ldb_val(mem_ctx, sam_ctx, &el->values[i]);
 787                 NTSTATUS status;
 788                 struct dom_sid *sid;
 789
 790                 sid = talloc(*sids, struct dom_sid);
 791                 W_ERROR_HAVE_NO_MEMORY(sid);
 792                 status = dsdb_get_extended_dn_sid(dn, sid, "SID");
 793                 if (!NT_STATUS_IS_OK(status)) {
 794                         return WERR_INTERNAL_DB_CORRUPTION;
 795                 }
 796                 (*sids)[i] = sid;
 797         }
 798         (*sids)[i] = NULL;
 799
 800         return WERR_OK;
 801 }
 802
 803
 804 /*
 805   return an array of SIDs from a ldb_message given an attribute name
 806   assumes the SIDs are in NDR form
 807  */
 808 static WERROR samdb_result_sid_array_ndr(struct ldb_context *sam_ctx,
 809                                          struct ldb_message *msg,
 810                                          TALLOC_CTX *mem_ctx,
 811                                          const char *attr,
 812                                          const struct dom_sid ***sids)
 813 {
 814         struct ldb_message_element *el;
 815         unsigned int i;
 816
 817         el = ldb_msg_find_element(msg, attr);
 818         if (!el) {
 819                 *sids = NULL;
 820                 return WERR_OK;
 821         }
 822
 823         (*sids) = talloc_array(mem_ctx, const struct dom_sid *, el->num_values + 1);
 824         W_ERROR_HAVE_NO_MEMORY(*sids);
 825
 826         for (i=0; i<el->num_values; i++) {
 827                 enum ndr_err_code ndr_err;
 828                 struct dom_sid *sid;
 829
 830                 sid = talloc(*sids, struct dom_sid);
 831                 W_ERROR_HAVE_NO_MEMORY(sid);
 832
 833                 ndr_err = ndr_pull_struct_blob(&el->values[i], sid, sid,
 834                                                (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
 835                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 836                         return WERR_INTERNAL_DB_CORRUPTION;
 837                 }
 838                 (*sids)[i] = sid;
 839         }
 840         (*sids)[i] = NULL;
 841
 842         return WERR_OK;
 843 }
 844
 845 /*
 846   see if any SIDs in list1 are in list2
 847  */
 848 static bool sid_list_match(const struct dom_sid **list1, const struct dom_sid **list2)
 849 {
 850         unsigned int i, j;
 851         /* do we ever have enough SIDs here to worry about O(n^2) ? */
 852         for (i=0; list1[i]; i++) {
 853                 for (j=0; list2[j]; j++) {
 854                         if (dom_sid_equal(list1[i], list2[j])) {
 855                                 return true;
 856                         }
 857                 }
 858         }
 859         return false;
 860 }
 861
 862 /*
 863   handle a DRSUAPI_EXOP_REPL_SECRET call
 864  */
 865 static WERROR getncchanges_repl_secret(struct drsuapi_bind_state *b_state,
 866                                        TALLOC_CTX *mem_ctx,
 867                                        struct drsuapi_DsGetNCChangesRequest10 *req10,
 868                                        struct dom_sid *user_sid,
 869                                        struct drsuapi_DsGetNCChangesCtr6 *ctr6)
 870 {
 871         struct drsuapi_DsReplicaObjectIdentifier *ncRoot = req10->naming_context;
 872         struct ldb_dn *obj_dn, *rodc_dn, *krbtgt_link_dn;
 873         int ret;
 874         const char *rodc_attrs[] = { "msDS-KrbTgtLink", "msDS-NeverRevealGroup", "msDS-RevealOnDemandGroup", NULL };
 875         const char *obj_attrs[] = { "tokenGroups", "objectSid", "UserAccountControl", "msDS-KrbTgtLinkBL", NULL };
 876         struct ldb_result *rodc_res, *obj_res;
 877         const struct dom_sid **never_reveal_sids, **reveal_sids, **token_sids;
 878         WERROR werr;
 879
 880         DEBUG(3,(__location__ ": DRSUAPI_EXOP_REPL_SECRET extended op on %s\n",
 881                  drs_ObjectIdentifier_to_string(mem_ctx, ncRoot)));
 882
 883         /*
 884          * we need to work out if we will allow this RODC to
 885          * replicate the secrets for this object
 886          *
 887          * see 4.1.10.5.14 GetRevealSecretsPolicyForUser for details
 888          * of this function
 889          */
 890
 891         if (b_state->sam_ctx_system == NULL) {
 892                 /* this operation needs system level access */
 893                 ctr6->extended_ret = DRSUAPI_EXOP_ERR_ACCESS_DENIED;
 894                 return WERR_DS_DRA_SOURCE_DISABLED;
 895         }
 896
 897         obj_dn = drs_ObjectIdentifier_to_dn(mem_ctx, b_state->sam_ctx_system, ncRoot);
 898         if (!ldb_dn_validate(obj_dn)) goto failed;
 899
 900         rodc_dn = ldb_dn_new_fmt(mem_ctx, b_state->sam_ctx_system, "<SID=%s>",
 901                                  dom_sid_string(mem_ctx, user_sid));
 902         if (!ldb_dn_validate(rodc_dn)) goto failed;
 903
 904         /* do the two searches we need */
 905         ret = dsdb_search_dn(b_state->sam_ctx_system, mem_ctx, &rodc_res, rodc_dn, rodc_attrs,
 906                              DSDB_SEARCH_SHOW_EXTENDED_DN);
 907         if (ret != LDB_SUCCESS || rodc_res->count != 1) goto failed;
 908
 909         ret = dsdb_search_dn(b_state->sam_ctx_system, mem_ctx, &obj_res, obj_dn, obj_attrs, 0);
 910         if (ret != LDB_SUCCESS || obj_res->count != 1) goto failed;
 911
 912         /* if the object SID is equal to the user_sid, allow */
 913         if (dom_sid_equal(user_sid,
 914                           samdb_result_dom_sid(mem_ctx, obj_res->msgs[0], "objectSid"))) {
 915                 goto allowed;
 916         }
 917
 918         /* an RODC is allowed to get its own krbtgt account secrets */
 919         krbtgt_link_dn = samdb_result_dn(b_state->sam_ctx_system, mem_ctx,
 920                                          rodc_res->msgs[0], "msDS-KrbTgtLink", NULL);
 921         if (krbtgt_link_dn != NULL &&
 922             ldb_dn_compare(obj_dn, krbtgt_link_dn) == 0) {
 923                 goto allowed;
 924         }
 925
 926         /* but it isn't allowed to get anyone elses krbtgt secrets */
 927         if (samdb_result_dn(b_state->sam_ctx_system, mem_ctx,
 928                             obj_res->msgs[0], "msDS-KrbTgtLinkBL", NULL)) {
 929                 goto denied;
 930         }
 931
 932         if (ldb_msg_find_attr_as_uint(obj_res->msgs[0],
 933                                       "userAccountControl", 0) &
 934             UF_INTERDOMAIN_TRUST_ACCOUNT) {
 935                 goto denied;
 936         }
 937
 938         werr = samdb_result_sid_array_dn(b_state->sam_ctx_system, rodc_res->msgs[0],
 939                                          mem_ctx, "msDS-NeverRevealGroup", &never_reveal_sids);
 940         if (!W_ERROR_IS_OK(werr)) {
 941                 goto denied;
 942         }
 943
 944         werr = samdb_result_sid_array_dn(b_state->sam_ctx_system, rodc_res->msgs[0],
 945                                          mem_ctx, "msDS-RevealOnDemandGroup", &reveal_sids);
 946         if (!W_ERROR_IS_OK(werr)) {
 947                 goto denied;
 948         }
 949
 950         werr = samdb_result_sid_array_ndr(b_state->sam_ctx_system, obj_res->msgs[0],
 951                                          mem_ctx, "tokenGroups", &token_sids);
 952         if (!W_ERROR_IS_OK(werr) || token_sids==NULL) {
 953                 goto denied;
 954         }
 955
 956         if (never_reveal_sids &&
 957             sid_list_match(token_sids, never_reveal_sids)) {
 958                 goto denied;
 959         }
 960
 961         if (reveal_sids &&
 962             sid_list_match(token_sids, reveal_sids)) {
 963                 goto allowed;
 964         }
 965
 966         /* default deny */
 967 denied:
 968         DEBUG(2,(__location__ ": Denied RODC secret replication for %s by RODC %s\n",
 969                  ldb_dn_get_linearized(obj_dn), ldb_dn_get_linearized(rodc_res->msgs[0]->dn)));
 970         ctr6->extended_ret = DRSUAPI_EXOP_ERR_NONE;
 971         return WERR_DS_DRA_ACCESS_DENIED;
 972
 973 allowed:
 974         DEBUG(2,(__location__ ": Allowed RODC secret replication for %s by RODC %s\n",
 975                  ldb_dn_get_linearized(obj_dn), ldb_dn_get_linearized(rodc_res->msgs[0]->dn)));
 976         ctr6->extended_ret = DRSUAPI_EXOP_ERR_SUCCESS;
 977         req10->highwatermark.highest_usn = 0;
 978         return WERR_OK;
 979
 980 failed:
 981         DEBUG(2,(__location__ ": Failed RODC secret replication for %s by RODC %s\n",
 982                  ldb_dn_get_linearized(obj_dn), dom_sid_string(mem_ctx, user_sid)));
 983         ctr6->extended_ret = DRSUAPI_EXOP_ERR_NONE;
 984         return WERR_DS_DRA_BAD_DN;
 985 }
 986
 987
 988 /*
 989   handle a DRSUAPI_EXOP_REPL_OBJ call
 990  */
 991 static WERROR getncchanges_repl_obj(struct drsuapi_bind_state *b_state,
 992                                     TALLOC_CTX *mem_ctx,
 993                                     struct drsuapi_DsGetNCChangesRequest10 *req10,
 994                                     struct dom_sid *user_sid,
 995                                     struct drsuapi_DsGetNCChangesCtr6 *ctr6)
 996 {
 997         struct drsuapi_DsReplicaObjectIdentifier *ncRoot = req10->naming_context;
 998
 999         DEBUG(3,(__location__ ": DRSUAPI_EXOP_REPL_OBJ extended op on %s\n",
1000                  drs_ObjectIdentifier_to_string(mem_ctx, ncRoot)));
1001
1002         ctr6->extended_ret = DRSUAPI_EXOP_ERR_SUCCESS;
1003         req10->highwatermark.highest_usn = 0;
1004         return WERR_OK;
1005 }
1006
1007
1008 /*
1009   handle DRSUAPI_EXOP_FSMO_REQ_ROLE,
1010   DRSUAPI_EXOP_FSMO_RID_REQ_ROLE,
1011   and DRSUAPI_EXOP_FSMO_REQ_PDC calls
1012  */
1013 static WERROR getncchanges_change_master(struct drsuapi_bind_state *b_state,
1014                                          TALLOC_CTX *mem_ctx,
1015                                          struct drsuapi_DsGetNCChangesRequest10 *req10,
1016                                          struct drsuapi_DsGetNCChangesCtr6 *ctr6)
1017 {
1018         struct ldb_dn *fsmo_role_dn, *req_dn, *ntds_dn;
1019         int ret;
1020         unsigned int i;
1021         struct ldb_context *ldb = b_state->sam_ctx;
1022         struct ldb_message *msg;
1023
1024         /*
1025           steps:
1026             - verify that the client dn exists
1027             - verify that we are the current master
1028          */
1029
1030         req_dn = drs_ObjectIdentifier_to_dn(mem_ctx, ldb, req10->naming_context);
1031         if (!ldb_dn_validate(req_dn)) {
1032                 /* that is not a valid dn */
1033                 DEBUG(0,(__location__ ": FSMO role transfer request for invalid DN %s\n",
1034                          drs_ObjectIdentifier_to_string(mem_ctx, req10->naming_context)));
1035                 ctr6->extended_ret = DRSUAPI_EXOP_ERR_MISMATCH;
1036                 return WERR_OK;
1037         }
1038
1039         /* retrieve the current role owner */
1040         ret = samdb_reference_dn(ldb, mem_ctx, req_dn, "fSMORoleOwner", &fsmo_role_dn);
1041         if (ret != LDB_SUCCESS) {
1042                 DEBUG(0,(__location__ ": Failed to find fSMORoleOwner in context - %s\n",
1043                          ldb_errstring(ldb)));
1044                 ctr6->extended_ret = DRSUAPI_EXOP_ERR_FSMO_NOT_OWNER;
1045                 return WERR_DS_DRA_INTERNAL_ERROR;
1046         }
1047
1048         if (ldb_dn_compare(samdb_ntds_settings_dn(ldb), fsmo_role_dn) != 0) {
1049                 /* we're not the current owner - go away */
1050                 DEBUG(0,(__location__ ": FSMO transfer request when not owner\n"));
1051                 ctr6->extended_ret = DRSUAPI_EXOP_ERR_FSMO_NOT_OWNER;
1052                 return WERR_OK;
1053         }
1054
1055         /* change the current master */
1056         msg = ldb_msg_new(ldb);
1057         W_ERROR_HAVE_NO_MEMORY(msg);
1058         msg->dn = drs_ObjectIdentifier_to_dn(msg, ldb, req10->naming_context);
1059         W_ERROR_HAVE_NO_MEMORY(msg->dn);
1060
1061         /* TODO: make sure ntds_dn is a valid nTDSDSA object */
1062         ret = dsdb_find_dn_by_guid(ldb, msg, &req10->destination_dsa_guid, &ntds_dn);
1063         if (ret != LDB_SUCCESS) {
1064                 DEBUG(0, (__location__ ": Unable to find NTDS object for guid %s - %s\n",
1065                           GUID_string(mem_ctx, &req10->destination_dsa_guid), ldb_errstring(ldb)));
1066                 talloc_free(msg);
1067                 ctr6->extended_ret = DRSUAPI_EXOP_ERR_UNKNOWN_CALLER;
1068                 return WERR_OK;
1069         }
1070
1071         ret = ldb_msg_add_string(msg, "fSMORoleOwner", ldb_dn_get_linearized(ntds_dn));
1072         if (ret != 0) {
1073                 talloc_free(msg);
1074                 return WERR_DS_DRA_INTERNAL_ERROR;
1075         }
1076
1077         for (i=0;i<msg->num_elements;i++) {
1078                 msg->elements[i].flags = LDB_FLAG_MOD_REPLACE;
1079         }
1080
1081         ret = ldb_transaction_start(ldb);
1082         if (ret != LDB_SUCCESS) {
1083                 DEBUG(0,(__location__ ": Failed transaction start - %s\n",
1084                          ldb_errstring(ldb)));
1085                 return WERR_DS_DRA_INTERNAL_ERROR;
1086         }
1087
1088         ret = ldb_modify(ldb, msg);
1089         if (ret != LDB_SUCCESS) {
1090                 DEBUG(0,(__location__ ": Failed to change current owner - %s\n",
1091                          ldb_errstring(ldb)));
1092                 ldb_transaction_cancel(ldb);
1093                 return WERR_DS_DRA_INTERNAL_ERROR;
1094         }
1095
1096         ret = ldb_transaction_commit(ldb);
1097         if (ret != LDB_SUCCESS) {
1098                 DEBUG(0,(__location__ ": Failed transaction commit - %s\n",
1099                          ldb_errstring(ldb)));
1100                 return WERR_DS_DRA_INTERNAL_ERROR;
1101         }
1102
1103         ctr6->extended_ret = DRSUAPI_EXOP_ERR_SUCCESS;
1104
1105         return WERR_OK;
1106 }
1107
1108 /* state of a partially completed getncchanges call */
1109 struct drsuapi_getncchanges_state {
1110         struct GUID *guids;
1111         uint32_t num_records;
1112         uint32_t num_processed;
1113         struct ldb_dn *ncRoot_dn;
1114         bool is_schema_nc;
1115         uint64_t min_usn;
1116         uint64_t highest_usn;
1117         struct ldb_dn *last_dn;
1118         struct drsuapi_DsReplicaLinkedAttribute *la_list;
1119         uint32_t la_count;
1120         bool la_sorted;
1121         uint32_t la_idx;
1122         struct drsuapi_DsReplicaCursorCtrEx *uptodateness_vector;
1123 };
1124
1125 /*
1126   see if this getncchanges request includes a request to reveal secret information
1127  */
1128 static WERROR dcesrv_drsuapi_is_reveal_secrets_request(struct drsuapi_bind_state *b_state,
1129                                                        struct drsuapi_DsGetNCChangesRequest10 *req10,
1130                                                        bool *is_secret_request)
1131 {
1132         enum drsuapi_DsExtendedOperation exop;
1133         uint32_t i;
1134         struct dsdb_schema *schema;
1135
1136         *is_secret_request = true;
1137
1138         exop = req10->extended_op;
1139
1140         switch (exop) {
1141         case DRSUAPI_EXOP_FSMO_REQ_ROLE:
1142         case DRSUAPI_EXOP_FSMO_RID_ALLOC:
1143         case DRSUAPI_EXOP_FSMO_RID_REQ_ROLE:
1144         case DRSUAPI_EXOP_FSMO_REQ_PDC:
1145         case DRSUAPI_EXOP_FSMO_ABANDON_ROLE:
1146                 /* FSMO exops can reveal secrets */
1147                 *is_secret_request = true;
1148                 return WERR_OK;
1149         case DRSUAPI_EXOP_REPL_SECRET:
1150         case DRSUAPI_EXOP_REPL_OBJ:
1151         case DRSUAPI_EXOP_NONE:
1152                 break;
1153         }
1154
1155         if (req10->replica_flags & DRSUAPI_DRS_SPECIAL_SECRET_PROCESSING) {
1156                 *is_secret_request = false;
1157                 return WERR_OK;
1158         }
1159
1160         if (exop == DRSUAPI_EXOP_REPL_SECRET ||
1161             req10->partial_attribute_set == NULL) {
1162                 /* they want secrets */
1163                 *is_secret_request = true;
1164                 return WERR_OK;
1165         }
1166
1167         schema = dsdb_get_schema(b_state->sam_ctx, NULL);
1168
1169         /* check the attributes they asked for */
1170         for (i=0; i<req10->partial_attribute_set->num_attids; i++) {
1171                 const struct dsdb_attribute *sa;
1172                 sa = dsdb_attribute_by_attributeID_id(schema, req10->partial_attribute_set->attids[i]);
1173                 if (sa == NULL) {
1174                         return WERR_DS_DRA_SCHEMA_MISMATCH;
1175                 }
1176                 if (!dsdb_attr_in_rodc_fas(sa)) {
1177                         *is_secret_request = true;
1178                         return WERR_OK;
1179                 }
1180         }
1181
1182         if (req10->partial_attribute_set_ex) {
1183                 /* check the extended attributes they asked for */
1184                 for (i=0; i<req10->partial_attribute_set_ex->num_attids; i++) {
1185                         const struct dsdb_attribute *sa;
1186                         sa = dsdb_attribute_by_attributeID_id(schema, req10->partial_attribute_set_ex->attids[i]);
1187                         if (sa == NULL) {
1188                                 return WERR_DS_DRA_SCHEMA_MISMATCH;
1189                         }
1190                         if (!dsdb_attr_in_rodc_fas(sa)) {
1191                                 *is_secret_request = true;
1192                                 return WERR_OK;
1193                         }
1194                 }
1195         }
1196
1197         *is_secret_request = false;
1198         return WERR_OK;
1199 }
1200
1201 /*
1202   see if this getncchanges request is only for attributes in the GC
1203   partial attribute set
1204  */
1205 static WERROR dcesrv_drsuapi_is_gc_pas_request(struct drsuapi_bind_state *b_state,
1206                                                struct drsuapi_DsGetNCChangesRequest10 *req10,
1207                                                bool *is_gc_pas_request)
1208 {
1209         enum drsuapi_DsExtendedOperation exop;
1210         uint32_t i;
1211         struct dsdb_schema *schema;
1212
1213         exop = req10->extended_op;
1214
1215         switch (exop) {
1216         case DRSUAPI_EXOP_FSMO_REQ_ROLE:
1217         case DRSUAPI_EXOP_FSMO_RID_ALLOC:
1218         case DRSUAPI_EXOP_FSMO_RID_REQ_ROLE:
1219         case DRSUAPI_EXOP_FSMO_REQ_PDC:
1220         case DRSUAPI_EXOP_FSMO_ABANDON_ROLE:
1221         case DRSUAPI_EXOP_REPL_SECRET:
1222                 *is_gc_pas_request = false;
1223                 return WERR_OK;
1224         case DRSUAPI_EXOP_REPL_OBJ:
1225         case DRSUAPI_EXOP_NONE:
1226                 break;
1227         }
1228
1229         if (req10->partial_attribute_set == NULL) {
1230                 /* they want it all */
1231                 *is_gc_pas_request = false;
1232                 return WERR_OK;
1233         }
1234
1235         schema = dsdb_get_schema(b_state->sam_ctx, NULL);
1236
1237         /* check the attributes they asked for */
1238         for (i=0; i<req10->partial_attribute_set->num_attids; i++) {
1239                 const struct dsdb_attribute *sa;
1240                 sa = dsdb_attribute_by_attributeID_id(schema, req10->partial_attribute_set->attids[i]);
1241                 if (sa == NULL) {
1242                         return WERR_DS_DRA_SCHEMA_MISMATCH;
1243                 }
1244                 if (!sa->isMemberOfPartialAttributeSet) {
1245                         *is_gc_pas_request = false;
1246                         return WERR_OK;
1247                 }
1248         }
1249
1250         if (req10->partial_attribute_set_ex) {
1251                 /* check the extended attributes they asked for */
1252                 for (i=0; i<req10->partial_attribute_set_ex->num_attids; i++) {
1253                         const struct dsdb_attribute *sa;
1254                         sa = dsdb_attribute_by_attributeID_id(schema, req10->partial_attribute_set_ex->attids[i]);
1255                         if (sa == NULL) {
1256                                 return WERR_DS_DRA_SCHEMA_MISMATCH;
1257                         }
1258                         if (!sa->isMemberOfPartialAttributeSet) {
1259                                 *is_gc_pas_request = false;
1260                                 return WERR_OK;
1261                         }
1262                 }
1263         }
1264
1265         *is_gc_pas_request = true;
1266         return WERR_OK;
1267 }
1268
1269
1270 /*
1271   map from req8 to req10
1272  */
1273 static struct drsuapi_DsGetNCChangesRequest10 *
1274 getncchanges_map_req8(TALLOC_CTX *mem_ctx,
1275                       struct drsuapi_DsGetNCChangesRequest8 *req8)
1276 {
1277         struct drsuapi_DsGetNCChangesRequest10 *req10 = talloc_zero(mem_ctx,
1278                                                                     struct drsuapi_DsGetNCChangesRequest10);
1279         if (req10 == NULL) {
1280                 return NULL;
1281         }
1282
1283         req10->destination_dsa_guid = req8->destination_dsa_guid;
1284         req10->source_dsa_invocation_id = req8->source_dsa_invocation_id;
1285         req10->naming_context = req8->naming_context;
1286         req10->highwatermark = req8->highwatermark;
1287         req10->uptodateness_vector = req8->uptodateness_vector;
1288         req10->replica_flags = req8->replica_flags;
1289         req10->max_object_count = req8->max_object_count;
1290         req10->max_ndr_size = req8->max_ndr_size;
1291         req10->extended_op = req8->extended_op;
1292         req10->fsmo_info = req8->fsmo_info;
1293         req10->partial_attribute_set = req8->partial_attribute_set;
1294         req10->partial_attribute_set_ex = req8->partial_attribute_set_ex;
1295         req10->mapping_ctr = req8->mapping_ctr;
1296
1297         return req10;
1298 }
1299
1300
1301 /**
1302  * Collects object for normal replication cycle.
1303  */
1304 static WERROR getncchanges_collect_objects(struct drsuapi_bind_state *b_state,
1305                                            TALLOC_CTX *mem_ctx,
1306                                            struct drsuapi_DsGetNCChangesRequest10 *req10,
1307                                            struct ldb_dn *search_dn,
1308                                            const char *extra_filter,
1309                                            struct ldb_result **search_res)
1310 {
1311         int ret;
1312         char* search_filter;
1313         enum ldb_scope scope = LDB_SCOPE_SUBTREE;
1314         //const char *extra_filter;
1315         struct drsuapi_getncchanges_state *getnc_state = b_state->getncchanges_state;
1316         const char *attrs[] = { "uSNChanged",
1317                                 "objectGUID" ,
1318                                 NULL };
1319
1320         if (req10->extended_op == DRSUAPI_EXOP_REPL_OBJ ||
1321             req10->extended_op == DRSUAPI_EXOP_REPL_SECRET) {
1322                 scope = LDB_SCOPE_BASE;
1323         }
1324
1325         //extra_filter = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "object filter");
1326
1327         //getnc_state->min_usn = req10->highwatermark.highest_usn;
1328
1329         /* Construct response. */
1330         search_filter = talloc_asprintf(mem_ctx,
1331                                         "(uSNChanged>=%llu)",
1332                                         (unsigned long long)(getnc_state->min_usn+1));
1333
1334         if (extra_filter) {
1335                 search_filter = talloc_asprintf(mem_ctx, "(&%s(%s))", search_filter, extra_filter);
1336         }
1337
1338         if (req10->replica_flags & DRSUAPI_DRS_CRITICAL_ONLY) {
1339                 search_filter = talloc_asprintf(mem_ctx,
1340                                                 "(&%s(isCriticalSystemObject=TRUE))",
1341                                                 search_filter);
1342         }
1343
1344         if (req10->replica_flags & DRSUAPI_DRS_ASYNC_REP) {
1345                 scope = LDB_SCOPE_BASE;
1346         }
1347
1348         if (!search_dn) {
1349                 search_dn = getnc_state->ncRoot_dn;
1350         }
1351
1352         DEBUG(2,(__location__ ": getncchanges on %s using filter %s\n",
1353                  ldb_dn_get_linearized(getnc_state->ncRoot_dn), search_filter));
1354         ret = drsuapi_search_with_extended_dn(b_state->sam_ctx, getnc_state, search_res,
1355                                               search_dn, scope, attrs,
1356                                               search_filter);
1357         if (ret != LDB_SUCCESS) {
1358                 return WERR_DS_DRA_INTERNAL_ERROR;
1359         }
1360
1361         return WERR_OK;
1362 }
1363
1364 /**
1365  * Collects object for normal replication cycle.
1366  */
1367 static WERROR getncchanges_collect_objects_exop(struct drsuapi_bind_state *b_state,
1368                                                 TALLOC_CTX *mem_ctx,
1369                                                 struct drsuapi_DsGetNCChangesRequest10 *req10,
1370                                                 struct drsuapi_DsGetNCChangesCtr6 *ctr6,
1371                                                 struct ldb_dn *search_dn,
1372                                                 const char *extra_filter,
1373                                                 struct ldb_result **search_res)
1374 {
1375         /* we have nothing to do in case of ex-op failure */
1376         if (ctr6->extended_ret != DRSUAPI_EXOP_ERR_SUCCESS) {
1377                 return WERR_OK;
1378         }
1379
1380         /* TODO: implement extended op specific collection
1381          * of objects. Right now we just normal procedure
1382          * for collecting objects */
1383         return getncchanges_collect_objects(b_state, mem_ctx, req10, search_dn, extra_filter, search_res);
1384 }
1385
1386 /*
1387   drsuapi_DsGetNCChanges
1388
1389   see MS-DRSR 4.1.10.5.2 for basic logic of this function
1390 */
1391 WERROR dcesrv_drsuapi_DsGetNCChanges(struct dcesrv_call_state *dce_call, TALLOC_CTX *mem_ctx,
1392                                      struct drsuapi_DsGetNCChanges *r)
1393 {
1394         struct drsuapi_DsReplicaObjectIdentifier *ncRoot;
1395         int ret;
1396         uint32_t i;
1397         struct dsdb_schema *schema;
1398         struct drsuapi_DsReplicaOIDMapping_Ctr *ctr;
1399         struct drsuapi_DsReplicaObjectListItemEx **currentObject;
1400         NTSTATUS status;
1401         DATA_BLOB session_key;
1402         WERROR werr;
1403         struct dcesrv_handle *h;
1404         struct drsuapi_bind_state *b_state;
1405         struct drsuapi_getncchanges_state *getnc_state;
1406         struct drsuapi_DsGetNCChangesRequest10 *req10;
1407         uint32_t options;
1408         uint32_t max_objects;
1409         uint32_t max_links;
1410         uint32_t link_count = 0;
1411         uint32_t link_total = 0;
1412         uint32_t link_given = 0;
1413         struct ldb_dn *search_dn = NULL;
1414         bool am_rodc, null_scope=false;
1415         enum security_user_level security_level;
1416         struct ldb_context *sam_ctx;
1417         struct dom_sid *user_sid;
1418         bool is_secret_request;
1419         bool is_gc_pas_request;
1420
1421         DCESRV_PULL_HANDLE_WERR(h, r->in.bind_handle, DRSUAPI_BIND_HANDLE);
1422         b_state = h->data;
1423
1424         sam_ctx = b_state->sam_ctx_system?b_state->sam_ctx_system:b_state->sam_ctx;
1425
1426         *r->out.level_out = 6;
1427         /* TODO: linked attributes*/
1428         r->out.ctr->ctr6.linked_attributes_count = 0;
1429         r->out.ctr->ctr6.linked_attributes = NULL;
1430
1431         r->out.ctr->ctr6.object_count = 0;
1432         r->out.ctr->ctr6.nc_object_count = 0;
1433         r->out.ctr->ctr6.more_data = false;
1434         r->out.ctr->ctr6.uptodateness_vector = NULL;
1435
1436         /* a RODC doesn't allow for any replication */
1437         ret = samdb_rodc(sam_ctx, &am_rodc);
1438         if (ret == LDB_SUCCESS && am_rodc) {
1439                 DEBUG(0,(__location__ ": DsGetNCChanges attempt on RODC\n"));
1440                 return WERR_DS_DRA_SOURCE_DISABLED;
1441         }
1442
1443         /* Check request revision.
1444          */
1445         switch (r->in.level) {
1446         case 8:
1447                 req10 = getncchanges_map_req8(mem_ctx, &r->in.req->req8);
1448                 if (req10 == NULL) {
1449                         return WERR_NOMEM;
1450                 }
1451                 break;
1452         case 10:
1453                 req10 = &r->in.req->req10;
1454                 break;
1455         default:
1456                 DEBUG(0,(__location__ ": Request for DsGetNCChanges with unsupported level %u\n",
1457                          r->in.level));
1458                 return WERR_REVISION_MISMATCH;
1459         }
1460
1461
1462         /* Perform access checks. */
1463         /* TODO: we need to support a sync on a specific non-root
1464          * DN. We'll need to find the real partition root here */
1465         ncRoot = req10->naming_context;
1466         if (ncRoot == NULL) {
1467                 DEBUG(0,(__location__ ": Request for DsGetNCChanges with no NC\n"));
1468                 return WERR_DS_DRA_INVALID_PARAMETER;
1469         }
1470
1471         if (samdb_ntds_options(sam_ctx, &options) != LDB_SUCCESS) {
1472                 return WERR_DS_DRA_INTERNAL_ERROR;
1473         }
1474
1475         if ((options & DS_NTDSDSA_OPT_DISABLE_OUTBOUND_REPL) &&
1476             !(req10->replica_flags & DRSUAPI_DRS_SYNC_FORCED)) {
1477                 return WERR_DS_DRA_SOURCE_DISABLED;
1478         }
1479
1480         user_sid = &dce_call->conn->auth_state.session_info->security_token->sids[PRIMARY_USER_SID_INDEX];
1481
1482         /* all clients must have GUID_DRS_GET_CHANGES */
1483         werr = drs_security_access_check_nc_root(b_state->sam_ctx,
1484                                                  mem_ctx,
1485                                                  dce_call->conn->auth_state.session_info->security_token,
1486                                                  req10->naming_context,
1487                                                  GUID_DRS_GET_CHANGES);
1488         if (!W_ERROR_IS_OK(werr)) {
1489                 return werr;
1490         }
1491
1492         /* allowed if the GC PAS and client has
1493            GUID_DRS_GET_FILTERED_ATTRIBUTES */
1494         werr = dcesrv_drsuapi_is_gc_pas_request(b_state, req10, &is_gc_pas_request);
1495         if (!W_ERROR_IS_OK(werr)) {
1496                 return werr;
1497         }
1498         if (is_gc_pas_request) {
1499                 werr = drs_security_access_check_nc_root(b_state->sam_ctx,
1500                                                          mem_ctx,
1501                                                          dce_call->conn->auth_state.session_info->security_token,
1502                                                          req10->naming_context,
1503                                                          GUID_DRS_GET_FILTERED_ATTRIBUTES);
1504                 if (W_ERROR_IS_OK(werr)) {
1505                         goto allowed;
1506                 }
1507         }
1508
1509         werr = dcesrv_drsuapi_is_reveal_secrets_request(b_state, req10, &is_secret_request);
1510         if (!W_ERROR_IS_OK(werr)) {
1511                 return werr;
1512         }
1513         if (is_secret_request && req10->extended_op != DRSUAPI_EXOP_REPL_SECRET) {
1514                 werr = drs_security_access_check_nc_root(b_state->sam_ctx,
1515                                                          mem_ctx,
1516                                                          dce_call->conn->auth_state.session_info->security_token,
1517                                                          req10->naming_context,
1518                                                          GUID_DRS_GET_ALL_CHANGES);
1519                 if (!W_ERROR_IS_OK(werr)) {
1520                         return werr;
1521                 }
1522         }
1523
1524 allowed:
1525         /* for non-administrator replications, check that they have
1526            given the correct source_dsa_invocation_id */
1527         security_level = security_session_user_level(dce_call->conn->auth_state.session_info,
1528                                                      samdb_domain_sid(sam_ctx));
1529         if (security_level == SECURITY_RO_DOMAIN_CONTROLLER) {
1530                 if (req10->replica_flags & DRSUAPI_DRS_WRIT_REP) {
1531                         /* we rely on this flag being unset for RODC requests */
1532                         req10->replica_flags &= ~DRSUAPI_DRS_WRIT_REP;
1533                 }
1534         }
1535
1536         if (req10->replica_flags & DRSUAPI_DRS_FULL_SYNC_PACKET) {
1537                 /* Ignore the _in_ uptpdateness vector*/
1538                 req10->uptodateness_vector = NULL;
1539         }
1540
1541         getnc_state = b_state->getncchanges_state;
1542
1543         /* see if a previous replication has been abandoned */
1544         if (getnc_state) {
1545                 struct ldb_dn *new_dn = drs_ObjectIdentifier_to_dn(getnc_state, sam_ctx, ncRoot);
1546                 if (ldb_dn_compare(new_dn, getnc_state->ncRoot_dn) != 0) {
1547                         DEBUG(0,(__location__ ": DsGetNCChanges 2nd replication on different DN %s %s (last_dn %s)\n",
1548                                  ldb_dn_get_linearized(new_dn),
1549                                  ldb_dn_get_linearized(getnc_state->ncRoot_dn),
1550                                  ldb_dn_get_linearized(getnc_state->last_dn)));
1551                         talloc_free(getnc_state);
1552                         getnc_state = NULL;
1553                 }
1554         }
1555
1556         if (getnc_state == NULL) {
1557                 getnc_state = talloc_zero(b_state, struct drsuapi_getncchanges_state);
1558                 if (getnc_state == NULL) {
1559                         return WERR_NOMEM;
1560                 }
1561                 b_state->getncchanges_state = getnc_state;
1562                 getnc_state->ncRoot_dn = drs_ObjectIdentifier_to_dn(getnc_state, sam_ctx, ncRoot);
1563
1564                 /* find out if we are to replicate Schema NC */
1565                 ret = ldb_dn_compare(getnc_state->ncRoot_dn,
1566                                      ldb_get_schema_basedn(b_state->sam_ctx));
1567                 getnc_state->is_schema_nc = (0 == ret);
1568
1569                 if (req10->extended_op != DRSUAPI_EXOP_NONE) {
1570                         r->out.ctr->ctr6.extended_ret = DRSUAPI_EXOP_ERR_SUCCESS;
1571                 }
1572
1573                 /*
1574                  * This is the first replication cycle and it is
1575                  * a good place to handle extended operations
1576                  *
1577                  * FIXME: we don't fully support extended operations yet
1578                  */
1579                 switch (req10->extended_op) {
1580                 case DRSUAPI_EXOP_NONE:
1581                         break;
1582                 case DRSUAPI_EXOP_FSMO_RID_ALLOC:
1583                         werr = getncchanges_rid_alloc(b_state, mem_ctx, req10, &r->out.ctr->ctr6);
1584                         W_ERROR_NOT_OK_RETURN(werr);
1585                         search_dn = ldb_get_default_basedn(sam_ctx);
1586                         break;
1587                 case DRSUAPI_EXOP_REPL_SECRET:
1588                         werr = getncchanges_repl_secret(b_state, mem_ctx, req10, user_sid, &r->out.ctr->ctr6);
1589                         r->out.result = werr;
1590                         W_ERROR_NOT_OK_RETURN(werr);
1591                         break;
1592                 case DRSUAPI_EXOP_FSMO_REQ_ROLE:
1593                         werr = getncchanges_change_master(b_state, mem_ctx, req10, &r->out.ctr->ctr6);
1594                         W_ERROR_NOT_OK_RETURN(werr);
1595                         break;
1596                 case DRSUAPI_EXOP_FSMO_RID_REQ_ROLE:
1597                         werr = getncchanges_change_master(b_state, mem_ctx, req10, &r->out.ctr->ctr6);
1598                         W_ERROR_NOT_OK_RETURN(werr);
1599                         break;
1600                 case DRSUAPI_EXOP_FSMO_REQ_PDC:
1601                         werr = getncchanges_change_master(b_state, mem_ctx, req10, &r->out.ctr->ctr6);
1602                         W_ERROR_NOT_OK_RETURN(werr);
1603                         break;
1604                 case DRSUAPI_EXOP_REPL_OBJ:
1605                         werr = getncchanges_repl_obj(b_state, mem_ctx, req10, user_sid, &r->out.ctr->ctr6);
1606                         r->out.result = werr;
1607                         W_ERROR_NOT_OK_RETURN(werr);
1608                         break;
1609
1610                 case DRSUAPI_EXOP_FSMO_ABANDON_ROLE:
1611
1612                         DEBUG(0,(__location__ ": Request for DsGetNCChanges unsupported extended op 0x%x\n",
1613                                  (unsigned)req10->extended_op));
1614                         return WERR_DS_DRA_NOT_SUPPORTED;
1615                 }
1616         }
1617
1618         if (!ldb_dn_validate(getnc_state->ncRoot_dn) ||
1619             ldb_dn_is_null(getnc_state->ncRoot_dn)) {
1620                 DEBUG(0,(__location__ ": Bad DN '%s'\n",
1621                          drs_ObjectIdentifier_to_string(mem_ctx, ncRoot)));
1622                 return WERR_DS_DRA_INVALID_PARAMETER;
1623         }
1624
1625         /* we need the session key for encrypting password attributes */
1626         status = dcesrv_inherited_session_key(dce_call->conn, &session_key);
1627         if (!NT_STATUS_IS_OK(status)) {
1628                 DEBUG(0,(__location__ ": Failed to get session key\n"));
1629                 return WERR_DS_DRA_INTERNAL_ERROR;
1630         }
1631
1632         /*
1633            TODO: MS-DRSR section 4.1.10.1.1
1634            Work out if this is the start of a new cycle */
1635
1636         if (getnc_state->guids == NULL) {
1637                 const char *extra_filter;
1638                 struct ldb_result *search_res = NULL;
1639
1640                 extra_filter = lpcfg_parm_string(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "object filter");
1641
1642                 getnc_state->min_usn = req10->highwatermark.highest_usn;
1643
1644                 if (req10->extended_op == DRSUAPI_EXOP_NONE) {
1645                         werr = getncchanges_collect_objects(b_state, mem_ctx, req10,
1646                                                             search_dn, extra_filter,
1647                                                             &search_res);
1648                 } else {
1649                         werr = getncchanges_collect_objects_exop(b_state, mem_ctx, req10,
1650                                                                  &r->out.ctr->ctr6,
1651                                                                  search_dn, extra_filter,
1652                                                                  &search_res);
1653                 }
1654                 W_ERROR_NOT_OK_RETURN(werr);
1655
1656                 if (search_res) {
1657                         if (req10->replica_flags & DRSUAPI_DRS_GET_ANC) {
1658                                 TYPESAFE_QSORT(search_res->msgs,
1659                                                search_res->count,
1660                                                site_res_cmp_parent_order);
1661                         } else {
1662                                 TYPESAFE_QSORT(search_res->msgs,
1663                                                search_res->count,
1664                                                site_res_cmp_usn_order);
1665                         }
1666                 }
1667
1668                 /* extract out the GUIDs list */
1669                 getnc_state->num_records = search_res ? search_res->count : 0;
1670                 getnc_state->guids = talloc_array(getnc_state, struct GUID, getnc_state->num_records);
1671                 W_ERROR_HAVE_NO_MEMORY(getnc_state->guids);
1672
1673                 for (i=0; i<getnc_state->num_records; i++) {
1674                         getnc_state->guids[i] = samdb_result_guid(search_res->msgs[i], "objectGUID");
1675                         if (GUID_all_zero(&getnc_state->guids[i])) {
1676                                 DEBUG(2,("getncchanges: bad objectGUID from %s\n", ldb_dn_get_linearized(search_res->msgs[i]->dn)));
1677                                 return WERR_DS_DRA_INTERNAL_ERROR;
1678                         }
1679                 }
1680
1681
1682                 talloc_free(search_res);
1683
1684                 getnc_state->uptodateness_vector = talloc_steal(getnc_state, req10->uptodateness_vector);
1685                 if (getnc_state->uptodateness_vector) {
1686                         /* make sure its sorted */
1687                         TYPESAFE_QSORT(getnc_state->uptodateness_vector->cursors,
1688                                        getnc_state->uptodateness_vector->count,
1689                                        drsuapi_DsReplicaCursor_compare);
1690                 }
1691         }
1692
1693         /* Prefix mapping */
1694         schema = dsdb_get_schema(sam_ctx, mem_ctx);
1695         if (!schema) {
1696                 DEBUG(0,("No schema in sam_ctx\n"));
1697                 return WERR_DS_DRA_INTERNAL_ERROR;
1698         }
1699
1700         r->out.ctr->ctr6.naming_context = talloc(mem_ctx, struct drsuapi_DsReplicaObjectIdentifier);
1701         *r->out.ctr->ctr6.naming_context = *ncRoot;
1702
1703         if (dsdb_find_guid_by_dn(sam_ctx, getnc_state->ncRoot_dn,
1704                                  &r->out.ctr->ctr6.naming_context->guid) != LDB_SUCCESS) {
1705                 DEBUG(0,(__location__ ": Failed to find GUID of ncRoot_dn %s\n",
1706                          ldb_dn_get_linearized(getnc_state->ncRoot_dn)));
1707                 return WERR_DS_DRA_INTERNAL_ERROR;
1708         }
1709
1710         /* find the SID if there is one */
1711         dsdb_find_sid_by_dn(sam_ctx, getnc_state->ncRoot_dn, &r->out.ctr->ctr6.naming_context->sid);
1712
1713         dsdb_get_oid_mappings_drsuapi(schema, true, mem_ctx, &ctr);
1714         r->out.ctr->ctr6.mapping_ctr = *ctr;
1715
1716         r->out.ctr->ctr6.source_dsa_guid = *(samdb_ntds_objectGUID(sam_ctx));
1717         r->out.ctr->ctr6.source_dsa_invocation_id = *(samdb_ntds_invocation_id(sam_ctx));
1718
1719         r->out.ctr->ctr6.old_highwatermark = req10->highwatermark;
1720         r->out.ctr->ctr6.new_highwatermark = req10->highwatermark;
1721
1722         r->out.ctr->ctr6.first_object = NULL;
1723         currentObject = &r->out.ctr->ctr6.first_object;
1724
1725         /* use this to force single objects at a time, which is useful
1726          * for working out what object is giving problems
1727          */
1728         max_objects = lpcfg_parm_int(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "max object sync", 1000);
1729         if (req10->max_object_count < max_objects) {
1730                 max_objects = req10->max_object_count;
1731         }
1732         /*
1733          * TODO: work out how the maximum should be calculated
1734          */
1735         max_links = lpcfg_parm_int(dce_call->conn->dce_ctx->lp_ctx, NULL, "drs", "max link sync", 1500);
1736
1737         for (i=getnc_state->num_processed;
1738              i<getnc_state->num_records &&
1739                      !null_scope &&
1740                      (r->out.ctr->ctr6.object_count < max_objects);
1741             i++) {
1742                 int uSN;
1743                 struct drsuapi_DsReplicaObjectListItemEx *obj;
1744                 struct ldb_message *msg;
1745                 static const char * const msg_attrs[] = {
1746                                             "*",
1747                                             "nTSecurityDescriptor",
1748                                             "parentGUID",
1749                                             "replPropertyMetaData",
1750                                             DSDB_SECRET_ATTRIBUTES,
1751                                             NULL };
1752                 struct ldb_result *msg_res;
1753                 struct ldb_dn *msg_dn;
1754
1755                 obj = talloc_zero(mem_ctx, struct drsuapi_DsReplicaObjectListItemEx);
1756                 W_ERROR_HAVE_NO_MEMORY(obj);
1757
1758                 msg_dn = ldb_dn_new_fmt(obj, sam_ctx, "<GUID=%s>", GUID_string(obj, &getnc_state->guids[i]));
1759                 W_ERROR_HAVE_NO_MEMORY(msg_dn);
1760
1761
1762                 /* by re-searching here we avoid having a lot of full
1763                  * records in memory between calls to getncchanges
1764                  */
1765                 ret = drsuapi_search_with_extended_dn(sam_ctx, obj, &msg_res,
1766                                                       msg_dn,
1767                                                       LDB_SCOPE_BASE, msg_attrs, NULL);
1768                 if (ret != LDB_SUCCESS) {
1769                         if (ret != LDB_ERR_NO_SUCH_OBJECT) {
1770                                 DEBUG(1,("getncchanges: failed to fetch DN %s - %s\n",
1771                                          ldb_dn_get_extended_linearized(obj, msg_dn, 1), ldb_errstring(sam_ctx)));
1772                         }
1773                         talloc_free(obj);
1774                         continue;
1775                 }
1776
1777                 msg = msg_res->msgs[0];
1778
1779                 werr = get_nc_changes_build_object(obj, msg,
1780                                                    sam_ctx, getnc_state->ncRoot_dn,
1781                                                    getnc_state->is_schema_nc,
1782                                                    schema, &session_key, getnc_state->min_usn,
1783                                                    req10->replica_flags,
1784                                                    req10->partial_attribute_set,
1785                                                    getnc_state->uptodateness_vector,
1786                                                    req10->extended_op);
1787                 if (!W_ERROR_IS_OK(werr)) {
1788                         return werr;
1789                 }
1790
1791                 werr = get_nc_changes_add_links(sam_ctx, getnc_state,
1792                                                 getnc_state->ncRoot_dn,
1793                                                 schema, getnc_state->min_usn,
1794                                                 req10->replica_flags,
1795                                                 msg,
1796                                                 &getnc_state->la_list,
1797                                                 &getnc_state->la_count,
1798                                                 getnc_state->uptodateness_vector);
1799                 if (!W_ERROR_IS_OK(werr)) {
1800                         return werr;
1801                 }
1802
1803                 uSN = ldb_msg_find_attr_as_int(msg, "uSNChanged", -1);
1804                 if (uSN > r->out.ctr->ctr6.new_highwatermark.tmp_highest_usn) {
1805                         r->out.ctr->ctr6.new_highwatermark.tmp_highest_usn = uSN;
1806                 }
1807                 if (uSN > getnc_state->highest_usn) {
1808                         getnc_state->highest_usn = uSN;
1809                 }
1810
1811                 if (obj->meta_data_ctr == NULL) {
1812                         DEBUG(8,(__location__ ": getncchanges skipping send of object %s\n",
1813                                  ldb_dn_get_linearized(msg->dn)));
1814                         /* no attributes to send */
1815                         talloc_free(obj);
1816                         continue;
1817                 }
1818
1819                 r->out.ctr->ctr6.object_count++;
1820
1821                 *currentObject = obj;
1822                 currentObject = &obj->next_object;
1823
1824                 talloc_free(getnc_state->last_dn);
1825                 getnc_state->last_dn = ldb_dn_copy(getnc_state, msg->dn);
1826
1827                 DEBUG(8,(__location__ ": replicating object %s\n", ldb_dn_get_linearized(msg->dn)));
1828
1829                 talloc_free(msg_res);
1830                 talloc_free(msg_dn);
1831         }
1832
1833         getnc_state->num_processed = i;
1834
1835         r->out.ctr->ctr6.nc_object_count = getnc_state->num_records;
1836
1837         /* the client can us to call UpdateRefs on its behalf to
1838            re-establish monitoring of the NC */
1839         if ((req10->replica_flags & (DRSUAPI_DRS_ADD_REF | DRSUAPI_DRS_REF_GCSPN)) &&
1840             !GUID_all_zero(&req10->destination_dsa_guid)) {
1841                 struct drsuapi_DsReplicaUpdateRefsRequest1 ureq;
1842                 DEBUG(3,("UpdateRefs on getncchanges for %s\n",
1843                          GUID_string(mem_ctx, &req10->destination_dsa_guid)));
1844                 ureq.naming_context = ncRoot;
1845                 ureq.dest_dsa_dns_name = samdb_ntds_msdcs_dns_name(b_state->sam_ctx, mem_ctx,
1846                                                                    &req10->destination_dsa_guid);
1847                 if (!ureq.dest_dsa_dns_name) {
1848                         return WERR_NOMEM;
1849                 }
1850                 ureq.dest_dsa_guid = req10->destination_dsa_guid;
1851                 ureq.options = DRSUAPI_DRS_ADD_REF |
1852                         DRSUAPI_DRS_ASYNC_OP |
1853                         DRSUAPI_DRS_GETCHG_CHECK;
1854
1855                 /* we also need to pass through the
1856                    DRSUAPI_DRS_REF_GCSPN bit so that repsTo gets flagged
1857                    to send notifies using the GC SPN */
1858                 ureq.options |= (req10->replica_flags & DRSUAPI_DRS_REF_GCSPN);
1859
1860                 werr = drsuapi_UpdateRefs(b_state, mem_ctx, &ureq);
1861                 if (!W_ERROR_IS_OK(werr)) {
1862                         DEBUG(0,(__location__ ": Failed UpdateRefs in DsGetNCChanges - %s\n",
1863                                  win_errstr(werr)));
1864                 }
1865         }
1866
1867         /*
1868          * TODO:
1869          * This is just a guess, how to calculate the
1870          * number of linked attributes to send, we need to
1871          * find out how to do this right.
1872          */
1873         if (r->out.ctr->ctr6.object_count >= max_links) {
1874                 max_links = 0;
1875         } else {
1876                 max_links -= r->out.ctr->ctr6.object_count;
1877         }
1878
1879         link_total = getnc_state->la_count;
1880
1881         if (i < getnc_state->num_records) {
1882                 r->out.ctr->ctr6.more_data = true;
1883         } else {
1884                 /* sort the whole array the first time */
1885                 if (!getnc_state->la_sorted) {
1886                         LDB_TYPESAFE_QSORT(getnc_state->la_list, getnc_state->la_count,
1887                                            sam_ctx, linked_attribute_compare);
1888                         getnc_state->la_sorted = true;
1889                 }
1890
1891                 link_count = getnc_state->la_count - getnc_state->la_idx;
1892                 link_count = MIN(max_links, link_count);
1893
1894                 r->out.ctr->ctr6.linked_attributes_count = link_count;
1895                 r->out.ctr->ctr6.linked_attributes = getnc_state->la_list + getnc_state->la_idx;
1896
1897                 getnc_state->la_idx += link_count;
1898                 link_given = getnc_state->la_idx;
1899
1900                 if (getnc_state->la_idx < getnc_state->la_count) {
1901                         r->out.ctr->ctr6.more_data = true;
1902                 }
1903         }
1904
1905         if (!r->out.ctr->ctr6.more_data) {
1906                 talloc_steal(mem_ctx, getnc_state->la_list);
1907
1908                 r->out.ctr->ctr6.uptodateness_vector = talloc(mem_ctx, struct drsuapi_DsReplicaCursor2CtrEx);
1909                 r->out.ctr->ctr6.new_highwatermark.highest_usn = r->out.ctr->ctr6.new_highwatermark.tmp_highest_usn;
1910
1911                 werr = get_nc_changes_udv(sam_ctx, getnc_state->ncRoot_dn,
1912                                           r->out.ctr->ctr6.uptodateness_vector);
1913                 if (!W_ERROR_IS_OK(werr)) {
1914                         return werr;
1915                 }
1916
1917                 talloc_free(getnc_state);
1918                 b_state->getncchanges_state = NULL;
1919         }
1920
1921         if (req10->extended_op != DRSUAPI_EXOP_NONE) {
1922                 r->out.ctr->ctr6.uptodateness_vector = NULL;
1923                 r->out.ctr->ctr6.nc_object_count = 0;
1924                 ZERO_STRUCT(r->out.ctr->ctr6.new_highwatermark);
1925         }
1926
1927         DEBUG(r->out.ctr->ctr6.more_data?4:2,
1928               ("DsGetNCChanges with uSNChanged >= %llu flags 0x%08x on %s gave %u objects (done %u/%u) %u links (done %u/%u (as %s))\n",
1929                (unsigned long long)(req10->highwatermark.highest_usn+1),
1930                req10->replica_flags, drs_ObjectIdentifier_to_string(mem_ctx, ncRoot),
1931                r->out.ctr->ctr6.object_count,
1932                i, r->out.ctr->ctr6.more_data?getnc_state->num_records:i,
1933                r->out.ctr->ctr6.linked_attributes_count,
1934                link_given, link_total,
1935                dom_sid_string(mem_ctx, user_sid)));
1936
1937 #if 0
1938         if (!r->out.ctr->ctr6.more_data && req10->extended_op != DRSUAPI_EXOP_NONE) {
1939                 NDR_PRINT_FUNCTION_DEBUG(drsuapi_DsGetNCChanges, NDR_BOTH, r);
1940         }
1941 #endif
1942
1943         return WERR_OK;
1944 }