source4/dsdb/repl/replicated_objects.c

   1 /*
   2    Unix SMB/CIFS mplementation.
   3    Helper functions for applying replicated objects
   4
   5    Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20 */
  21
  22 #include "includes.h"
  23 #include "dsdb/samdb/samdb.h"
  24 #include "lib/ldb/include/ldb_errors.h"
  25 #include "../lib/util/dlinklist.h"
  26 #include "librpc/gen_ndr/ndr_misc.h"
  27 #include "librpc/gen_ndr/ndr_drsuapi.h"
  28 #include "librpc/gen_ndr/ndr_drsblobs.h"
  29 #include "../lib/crypto/crypto.h"
  30 #include "../libcli/drsuapi/drsuapi.h"
  31 #include "libcli/auth/libcli_auth.h"
  32 #include "param/param.h"
  33
  34 WERROR dsdb_convert_object_ex(struct ldb_context *ldb,
  35                               const struct dsdb_schema *schema,
  36                               const struct drsuapi_DsReplicaObjectListItemEx *in,
  37                               const DATA_BLOB *gensec_skey,
  38                               TALLOC_CTX *mem_ctx,
  39                               struct dsdb_extended_replicated_object *out)
  40 {
  41         NTSTATUS nt_status;
  42         WERROR status;
  43         uint32_t i;
  44         struct ldb_message *msg;
  45         struct replPropertyMetaDataBlob *md;
  46         struct ldb_val guid_value;
  47         NTTIME whenChanged = 0;
  48         time_t whenChanged_t;
  49         const char *whenChanged_s;
  50         const char *rdn_name = NULL;
  51         const struct ldb_val *rdn_value = NULL;
  52         const struct dsdb_attribute *rdn_attr = NULL;
  53         uint32_t rdn_attid;
  54         struct drsuapi_DsReplicaAttribute *name_a = NULL;
  55         struct drsuapi_DsReplicaMetaData *name_d = NULL;
  56         struct replPropertyMetaData1 *rdn_m = NULL;
  57         struct dom_sid *sid = NULL;
  58         uint32_t rid = 0;
  59         int ret;
  60
  61         if (!in->object.identifier) {
  62                 return WERR_FOOBAR;
  63         }
  64
  65         if (!in->object.identifier->dn || !in->object.identifier->dn[0]) {
  66                 return WERR_FOOBAR;
  67         }
  68
  69         if (in->object.attribute_ctr.num_attributes != 0 && !in->meta_data_ctr) {
  70                 return WERR_FOOBAR;
  71         }
  72
  73         if (in->object.attribute_ctr.num_attributes != in->meta_data_ctr->count) {
  74                 return WERR_FOOBAR;
  75         }
  76
  77         sid = &in->object.identifier->sid;
  78         if (sid->num_auths > 0) {
  79                 rid = sid->sub_auths[sid->num_auths - 1];
  80         }
  81
  82         msg = ldb_msg_new(mem_ctx);
  83         W_ERROR_HAVE_NO_MEMORY(msg);
  84
  85         msg->dn                 = ldb_dn_new(msg, ldb, in->object.identifier->dn);
  86         W_ERROR_HAVE_NO_MEMORY(msg->dn);
  87
  88         rdn_name        = ldb_dn_get_rdn_name(msg->dn);
  89         rdn_attr        = dsdb_attribute_by_lDAPDisplayName(schema, rdn_name);
  90         if (!rdn_attr) {
  91                 return WERR_FOOBAR;
  92         }
  93         rdn_attid       = rdn_attr->attributeID_id;
  94         rdn_value       = ldb_dn_get_rdn_val(msg->dn);
  95
  96         msg->num_elements       = in->object.attribute_ctr.num_attributes;
  97         msg->elements           = talloc_array(msg, struct ldb_message_element,
  98                                                msg->num_elements);
  99         W_ERROR_HAVE_NO_MEMORY(msg->elements);
 100
 101         md = talloc(mem_ctx, struct replPropertyMetaDataBlob);
 102         W_ERROR_HAVE_NO_MEMORY(md);
 103
 104         md->version             = 1;
 105         md->reserved            = 0;
 106         md->ctr.ctr1.count      = in->meta_data_ctr->count;
 107         md->ctr.ctr1.reserved   = 0;
 108         md->ctr.ctr1.array      = talloc_array(mem_ctx,
 109                                                struct replPropertyMetaData1,
 110                                                md->ctr.ctr1.count + 1); /* +1 because of the RDN attribute */
 111         W_ERROR_HAVE_NO_MEMORY(md->ctr.ctr1.array);
 112
 113         for (i=0; i < in->meta_data_ctr->count; i++) {
 114                 struct drsuapi_DsReplicaAttribute *a;
 115                 struct drsuapi_DsReplicaMetaData *d;
 116                 struct replPropertyMetaData1 *m;
 117                 struct ldb_message_element *e;
 118                 uint32_t j;
 119
 120                 a = &in->object.attribute_ctr.attributes[i];
 121                 d = &in->meta_data_ctr->meta_data[i];
 122                 m = &md->ctr.ctr1.array[i];
 123                 e = &msg->elements[i];
 124
 125                 for (j=0; j<a->value_ctr.num_values; j++) {
 126                         status = drsuapi_decrypt_attribute(a->value_ctr.values[j].blob, gensec_skey, rid, a);
 127                         W_ERROR_NOT_OK_RETURN(status);
 128                 }
 129
 130                 status = dsdb_attribute_drsuapi_to_ldb(ldb, schema, a, msg->elements, e);
 131                 W_ERROR_NOT_OK_RETURN(status);
 132
 133                 m->attid                        = a->attid;
 134                 m->version                      = d->version;
 135                 m->originating_change_time      = d->originating_change_time;
 136                 m->originating_invocation_id    = d->originating_invocation_id;
 137                 m->originating_usn              = d->originating_usn;
 138                 m->local_usn                    = 0;
 139
 140                 if (d->originating_change_time > whenChanged) {
 141                         whenChanged = d->originating_change_time;
 142                 }
 143
 144                 if (a->attid == DRSUAPI_ATTRIBUTE_name) {
 145                         name_a = a;
 146                         name_d = d;
 147                         rdn_m = &md->ctr.ctr1.array[md->ctr.ctr1.count];
 148                 }
 149         }
 150
 151         if (rdn_m) {
 152                 struct ldb_message_element *el;
 153                 el = ldb_msg_find_element(msg, rdn_attr->lDAPDisplayName);
 154                 if (!el) {
 155                         ret = ldb_msg_add_value(msg, rdn_attr->lDAPDisplayName, rdn_value, NULL);
 156                         if (ret != LDB_SUCCESS) {
 157                                 return WERR_FOOBAR;
 158                         }
 159                 } else {
 160                         if (el->num_values != 1) {
 161                                 DEBUG(0,(__location__ ": Unexpected num_values=%u\n",
 162                                          el->num_values));
 163                                 return WERR_FOOBAR;
 164                         }
 165                         if (!ldb_val_equal_exact(&el->values[0], rdn_value)) {
 166                                 DEBUG(0,(__location__ ": RDN value changed? '%*.*s' '%*.*s'\n",
 167                                          (int)el->values[0].length, (int)el->values[0].length, el->values[0].data,
 168                                          (int)rdn_value->length, (int)rdn_value->length, rdn_value->data));
 169                                 return WERR_FOOBAR;
 170                         }
 171                 }
 172
 173                 rdn_m->attid                            = rdn_attid;
 174                 rdn_m->version                          = name_d->version;
 175                 rdn_m->originating_change_time          = name_d->originating_change_time;
 176                 rdn_m->originating_invocation_id        = name_d->originating_invocation_id;
 177                 rdn_m->originating_usn                  = name_d->originating_usn;
 178                 rdn_m->local_usn                        = 0;
 179                 md->ctr.ctr1.count++;
 180
 181         }
 182
 183         whenChanged_t = nt_time_to_unix(whenChanged);
 184         whenChanged_s = ldb_timestring(msg, whenChanged_t);
 185         W_ERROR_HAVE_NO_MEMORY(whenChanged_s);
 186
 187         nt_status = GUID_to_ndr_blob(&in->object.identifier->guid, msg, &guid_value);
 188         if (!NT_STATUS_IS_OK(nt_status)) {
 189                 return ntstatus_to_werror(nt_status);
 190         }
 191
 192         out->msg                = msg;
 193         out->guid_value         = guid_value;
 194         out->when_changed       = whenChanged_s;
 195         out->meta_data          = md;
 196         return WERR_OK;
 197 }
 198
 199 WERROR dsdb_extended_replicated_objects_convert(struct ldb_context *ldb,
 200                                                 const char *partition_dn_str,
 201                                                 const struct drsuapi_DsReplicaOIDMapping_Ctr *mapping_ctr,
 202                                                 uint32_t object_count,
 203                                                 const struct drsuapi_DsReplicaObjectListItemEx *first_object,
 204                                                 uint32_t linked_attributes_count,
 205                                                 const struct drsuapi_DsReplicaLinkedAttribute *linked_attributes,
 206                                                 const struct repsFromTo1 *source_dsa,
 207                                                 const struct drsuapi_DsReplicaCursor2CtrEx *uptodateness_vector,
 208                                                 const DATA_BLOB *gensec_skey,
 209                                                 TALLOC_CTX *mem_ctx,
 210                                                 struct dsdb_extended_replicated_objects **objects)
 211 {
 212         WERROR status;
 213         struct ldb_dn *partition_dn;
 214         const struct dsdb_schema *schema;
 215         struct dsdb_extended_replicated_objects *out;
 216         const struct drsuapi_DsReplicaObjectListItemEx *cur;
 217         uint32_t i;
 218
 219         out = talloc_zero(mem_ctx, struct dsdb_extended_replicated_objects);
 220         W_ERROR_HAVE_NO_MEMORY(out);
 221         out->version            = DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION;
 222
 223         /* Get the schema, and ensure it's kept valid for as long as 'out' which may contain pointers to it */
 224         schema = dsdb_get_schema(ldb, out);
 225         if (!schema) {
 226                 talloc_free(out);
 227                 return WERR_DS_SCHEMA_NOT_LOADED;
 228         }
 229
 230         partition_dn = ldb_dn_new(out, ldb, partition_dn_str);
 231         W_ERROR_HAVE_NO_MEMORY_AND_FREE(partition_dn, out);
 232
 233         if (ldb_dn_compare(partition_dn, ldb_get_schema_basedn(ldb)) != 0) {
 234                 /*
 235                  * check for schema changes in case
 236                  * we are not replicating Schema NC
 237                  */
 238                 status = dsdb_schema_info_cmp(schema, mapping_ctr);
 239                 if (!W_ERROR_IS_OK(status)) {
 240                         DEBUG(1,("Remote schema has changed while replicating %s\n",
 241                                  partition_dn_str));
 242                         talloc_free(out);
 243                         return status;
 244                 }
 245         }
 246
 247         out->partition_dn       = partition_dn;
 248
 249         out->source_dsa         = source_dsa;
 250         out->uptodateness_vector= uptodateness_vector;
 251
 252         out->num_objects        = object_count;
 253         out->objects            = talloc_array(out,
 254                                                struct dsdb_extended_replicated_object,
 255                                                out->num_objects);
 256         W_ERROR_HAVE_NO_MEMORY_AND_FREE(out->objects, out);
 257
 258         /* pass the linked attributes down to the repl_meta_data
 259            module */
 260         out->linked_attributes_count = linked_attributes_count;
 261         out->linked_attributes       = linked_attributes;
 262
 263         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 264                 if (i == out->num_objects) {
 265                         talloc_free(out);
 266                         return WERR_FOOBAR;
 267                 }
 268
 269                 status = dsdb_convert_object_ex(ldb, schema,
 270                                                 cur, gensec_skey,
 271                                                 out->objects, &out->objects[i]);
 272                 if (!W_ERROR_IS_OK(status)) {
 273                         talloc_free(out);
 274                         DEBUG(0,("Failed to convert object %s\n", cur->object.identifier->dn));
 275                         return status;
 276                 }
 277         }
 278         if (i != out->num_objects) {
 279                 talloc_free(out);
 280                 return WERR_FOOBAR;
 281         }
 282
 283         *objects = out;
 284         return WERR_OK;
 285 }
 286
 287 WERROR dsdb_extended_replicated_objects_commit(struct ldb_context *ldb,
 288                                                struct dsdb_extended_replicated_objects *objects,
 289                                                uint64_t *notify_uSN)
 290 {
 291         struct ldb_result *ext_res;
 292         int ret;
 293         uint64_t seq_num1, seq_num2;
 294
 295         /* TODO: handle linked attributes */
 296
 297         /* wrap the extended operation in a transaction
 298            See [MS-DRSR] 3.3.2 Transactions
 299          */
 300         ret = ldb_transaction_start(ldb);
 301         if (ret != LDB_SUCCESS) {
 302                 DEBUG(0,(__location__ " Failed to start transaction\n"));
 303                 return WERR_FOOBAR;
 304         }
 305
 306         ret = dsdb_load_partition_usn(ldb, objects->partition_dn, &seq_num1, NULL);
 307         if (ret != LDB_SUCCESS) {
 308                 DEBUG(0,(__location__ " Failed to load partition uSN\n"));
 309                 ldb_transaction_cancel(ldb);
 310                 return WERR_FOOBAR;
 311         }
 312
 313         ret = ldb_extended(ldb, DSDB_EXTENDED_REPLICATED_OBJECTS_OID, objects, &ext_res);
 314         if (ret != LDB_SUCCESS) {
 315                 DEBUG(0,("Failed to apply records: %s: %s\n",
 316                          ldb_errstring(ldb), ldb_strerror(ret)));
 317                 ldb_transaction_cancel(ldb);
 318                 return WERR_FOOBAR;
 319         }
 320         talloc_free(ext_res);
 321
 322         ret = ldb_transaction_prepare_commit(ldb);
 323         if (ret != LDB_SUCCESS) {
 324                 DEBUG(0,(__location__ " Failed to prepare commit of transaction: %s\n",
 325                          ldb_errstring(ldb)));
 326                 return WERR_FOOBAR;
 327         }
 328
 329         ret = dsdb_load_partition_usn(ldb, objects->partition_dn, &seq_num2, NULL);
 330         if (ret != LDB_SUCCESS) {
 331                 DEBUG(0,(__location__ " Failed to load partition uSN\n"));
 332                 ldb_transaction_cancel(ldb);
 333                 return WERR_FOOBAR;
 334         }
 335
 336         /* if this replication partner didn't need to be notified
 337            before this transaction then it still doesn't need to be
 338            notified, as the changes came from this server */
 339         if (seq_num2 > seq_num1 && seq_num1 <= *notify_uSN) {
 340                 *notify_uSN = seq_num2;
 341         }
 342
 343         ret = ldb_transaction_commit(ldb);
 344         if (ret != LDB_SUCCESS) {
 345                 DEBUG(0,(__location__ " Failed to commit transaction\n"));
 346                 return WERR_FOOBAR;
 347         }
 348
 349
 350         DEBUG(2,("Replicated %u objects (%u linked attributes) for %s\n",
 351                  objects->num_objects, objects->linked_attributes_count,
 352                  ldb_dn_get_linearized(objects->partition_dn)));
 353
 354         return WERR_OK;
 355 }
 356
 357 static WERROR dsdb_convert_object(struct ldb_context *ldb,
 358                                   const struct dsdb_schema *schema,
 359                                   const struct drsuapi_DsReplicaObjectListItem *in,
 360                                   TALLOC_CTX *mem_ctx,
 361                                   struct ldb_message **_msg)
 362 {
 363         WERROR status;
 364         unsigned int i;
 365         struct ldb_message *msg;
 366
 367         if (!in->object.identifier) {
 368                 return WERR_FOOBAR;
 369         }
 370
 371         if (!in->object.identifier->dn || !in->object.identifier->dn[0]) {
 372                 return WERR_FOOBAR;
 373         }
 374
 375         msg = ldb_msg_new(mem_ctx);
 376         W_ERROR_HAVE_NO_MEMORY(msg);
 377
 378         msg->dn = ldb_dn_new(msg, ldb, in->object.identifier->dn);
 379         W_ERROR_HAVE_NO_MEMORY(msg->dn);
 380
 381         msg->num_elements       = in->object.attribute_ctr.num_attributes;
 382         msg->elements           = talloc_array(msg, struct ldb_message_element,
 383                                                msg->num_elements);
 384         W_ERROR_HAVE_NO_MEMORY(msg->elements);
 385
 386         for (i=0; i < msg->num_elements; i++) {
 387                 struct drsuapi_DsReplicaAttribute *a;
 388                 struct ldb_message_element *e;
 389
 390                 a = &in->object.attribute_ctr.attributes[i];
 391                 e = &msg->elements[i];
 392
 393                 status = dsdb_attribute_drsuapi_to_ldb(ldb, schema, a, msg->elements, e);
 394                 W_ERROR_NOT_OK_RETURN(status);
 395         }
 396
 397
 398         *_msg = msg;
 399
 400         return WERR_OK;
 401 }
 402
 403 WERROR dsdb_origin_objects_commit(struct ldb_context *ldb,
 404                                   TALLOC_CTX *mem_ctx,
 405                                   const struct drsuapi_DsReplicaObjectListItem *first_object,
 406                                   uint32_t *_num,
 407                                   struct drsuapi_DsReplicaObjectIdentifier2 **_ids)
 408 {
 409         WERROR status;
 410         const struct dsdb_schema *schema;
 411         const struct drsuapi_DsReplicaObjectListItem *cur;
 412         struct ldb_message **objects;
 413         struct drsuapi_DsReplicaObjectIdentifier2 *ids;
 414         uint32_t i;
 415         uint32_t num_objects = 0;
 416         const char * const attrs[] = {
 417                 "objectGUID",
 418                 "objectSid",
 419                 NULL
 420         };
 421         struct ldb_result *res;
 422         int ret;
 423
 424         for (cur = first_object; cur; cur = cur->next_object) {
 425                 num_objects++;
 426         }
 427
 428         if (num_objects == 0) {
 429                 return WERR_OK;
 430         }
 431
 432         ret = ldb_transaction_start(ldb);
 433         if (ret != LDB_SUCCESS) {
 434                 return WERR_DS_INTERNAL_FAILURE;
 435         }
 436
 437         objects = talloc_array(mem_ctx, struct ldb_message *,
 438                                num_objects);
 439         if (objects == NULL) {
 440                 status = WERR_NOMEM;
 441                 goto cancel;
 442         }
 443
 444         schema = dsdb_get_schema(ldb, objects);
 445         if (!schema) {
 446                 return WERR_DS_SCHEMA_NOT_LOADED;
 447         }
 448
 449         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 450                 status = dsdb_convert_object(ldb, schema,
 451                                              cur, objects, &objects[i]);
 452                 if (!W_ERROR_IS_OK(status)) {
 453                         goto cancel;
 454                 }
 455         }
 456
 457         ids = talloc_array(mem_ctx,
 458                            struct drsuapi_DsReplicaObjectIdentifier2,
 459                            num_objects);
 460         if (ids == NULL) {
 461                 status = WERR_NOMEM;
 462                 goto cancel;
 463         }
 464
 465         for (i=0; i < num_objects; i++) {
 466                 struct dom_sid *sid = NULL;
 467                 struct ldb_request *add_req;
 468
 469                 DEBUG(6,(__location__ ": adding %s\n",
 470                          ldb_dn_get_linearized(objects[i]->dn)));
 471
 472                 ret = ldb_build_add_req(&add_req,
 473                                         ldb,
 474                                         objects,
 475                                         objects[i],
 476                                         NULL,
 477                                         NULL,
 478                                         ldb_op_default_callback,
 479                                         NULL);
 480                 if (ret != LDB_SUCCESS) {
 481                         status = WERR_DS_INTERNAL_FAILURE;
 482                         goto cancel;
 483                 }
 484
 485                 ret = ldb_request_add_control(add_req, LDB_CONTROL_RELAX_OID, true, NULL);
 486                 if (ret != LDB_SUCCESS) {
 487                         status = WERR_DS_INTERNAL_FAILURE;
 488                         goto cancel;
 489                 }
 490
 491                 ret = ldb_request(ldb, add_req);
 492                 if (ret == LDB_SUCCESS) {
 493                         ret = ldb_wait(add_req->handle, LDB_WAIT_ALL);
 494                 }
 495                 if (ret != LDB_SUCCESS) {
 496                         DEBUG(0,(__location__ ": Failed add of %s - %s\n",
 497                                  ldb_dn_get_linearized(objects[i]->dn), ldb_errstring(ldb)));
 498                         status = WERR_DS_INTERNAL_FAILURE;
 499                         goto cancel;
 500                 }
 501
 502                 talloc_free(add_req);
 503
 504                 ret = ldb_search(ldb, objects, &res, objects[i]->dn,
 505                                  LDB_SCOPE_BASE, attrs,
 506                                  "(objectClass=*)");
 507                 if (ret != LDB_SUCCESS) {
 508                         status = WERR_DS_INTERNAL_FAILURE;
 509                         goto cancel;
 510                 }
 511                 ids[i].guid = samdb_result_guid(res->msgs[0], "objectGUID");
 512                 sid = samdb_result_dom_sid(objects, res->msgs[0], "objectSid");
 513                 if (sid) {
 514                         ids[i].sid = *sid;
 515                 } else {
 516                         ZERO_STRUCT(ids[i].sid);
 517                 }
 518         }
 519
 520         ret = ldb_transaction_commit(ldb);
 521         if (ret != LDB_SUCCESS) {
 522                 return WERR_DS_INTERNAL_FAILURE;
 523         }
 524
 525         talloc_free(objects);
 526
 527         *_num = num_objects;
 528         *_ids = ids;
 529         return WERR_OK;
 530
 531 cancel:
 532         talloc_free(objects);
 533         ldb_transaction_cancel(ldb);
 534         return status;
 535 }