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,
 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         const struct dsdb_schema *schema;
 214         struct dsdb_extended_replicated_objects *out;
 215         const struct drsuapi_DsReplicaObjectListItemEx *cur;
 216         uint32_t i;
 217
 218         out = talloc_zero(mem_ctx, struct dsdb_extended_replicated_objects);
 219         W_ERROR_HAVE_NO_MEMORY(out);
 220         out->version            = DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION;
 221
 222         /* Get the schema, and ensure it's kept valid for as long as 'out' which may contain pointers to it */
 223         schema = dsdb_get_schema(ldb, out);
 224         if (!schema) {
 225                 talloc_free(out);
 226                 return WERR_DS_SCHEMA_NOT_LOADED;
 227         }
 228
 229         status = dsdb_schema_pfm_contains_drsuapi_pfm(schema->prefixmap, mapping_ctr);
 230         if (!W_ERROR_IS_OK(status)) {
 231                 talloc_free(out);
 232                 return status;
 233         }
 234
 235         out->partition_dn       = ldb_dn_new(out, ldb, partition_dn);
 236         W_ERROR_HAVE_NO_MEMORY(out->partition_dn);
 237
 238         out->source_dsa         = source_dsa;
 239         out->uptodateness_vector= uptodateness_vector;
 240
 241         out->num_objects        = object_count;
 242         out->objects            = talloc_array(out,
 243                                                struct dsdb_extended_replicated_object,
 244                                                out->num_objects);
 245         W_ERROR_HAVE_NO_MEMORY(out->objects);
 246
 247         /* pass the linked attributes down to the repl_meta_data
 248            module */
 249         out->linked_attributes_count = linked_attributes_count;
 250         out->linked_attributes       = linked_attributes;
 251
 252         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 253                 if (i == out->num_objects) {
 254                         talloc_free(out);
 255                         return WERR_FOOBAR;
 256                 }
 257
 258                 status = dsdb_convert_object_ex(ldb, schema,
 259                                                 cur, gensec_skey,
 260                                                 out->objects, &out->objects[i]);
 261                 if (!W_ERROR_IS_OK(status)) {
 262                         talloc_free(out);
 263                         DEBUG(0,("Failed to convert object %s\n", cur->object.identifier->dn));
 264                         return status;
 265                 }
 266         }
 267         if (i != out->num_objects) {
 268                 talloc_free(out);
 269                 return WERR_FOOBAR;
 270         }
 271
 272         *objects = out;
 273         return WERR_OK;
 274 }
 275
 276 WERROR dsdb_extended_replicated_objects_commit(struct ldb_context *ldb,
 277                                                struct dsdb_extended_replicated_objects *objects,
 278                                                uint64_t *notify_uSN)
 279 {
 280         struct ldb_result *ext_res;
 281         int ret;
 282         uint64_t seq_num1, seq_num2;
 283
 284         /* TODO: handle linked attributes */
 285
 286         /* wrap the extended operation in a transaction
 287            See [MS-DRSR] 3.3.2 Transactions
 288          */
 289         ret = ldb_transaction_start(ldb);
 290         if (ret != LDB_SUCCESS) {
 291                 DEBUG(0,(__location__ " Failed to start transaction\n"));
 292                 return WERR_FOOBAR;
 293         }
 294
 295         ret = dsdb_load_partition_usn(ldb, objects->partition_dn, &seq_num1, NULL);
 296         if (ret != LDB_SUCCESS) {
 297                 DEBUG(0,(__location__ " Failed to load partition uSN\n"));
 298                 ldb_transaction_cancel(ldb);
 299                 return WERR_FOOBAR;
 300         }
 301
 302         ret = ldb_extended(ldb, DSDB_EXTENDED_REPLICATED_OBJECTS_OID, objects, &ext_res);
 303         if (ret != LDB_SUCCESS) {
 304                 DEBUG(0,("Failed to apply records: %s: %s\n",
 305                          ldb_errstring(ldb), ldb_strerror(ret)));
 306                 ldb_transaction_cancel(ldb);
 307                 return WERR_FOOBAR;
 308         }
 309         talloc_free(ext_res);
 310
 311         ret = ldb_transaction_prepare_commit(ldb);
 312         if (ret != LDB_SUCCESS) {
 313                 DEBUG(0,(__location__ " Failed to prepare commit of transaction: %s\n",
 314                          ldb_errstring(ldb)));
 315                 return WERR_FOOBAR;
 316         }
 317
 318         ret = dsdb_load_partition_usn(ldb, objects->partition_dn, &seq_num2, NULL);
 319         if (ret != LDB_SUCCESS) {
 320                 DEBUG(0,(__location__ " Failed to load partition uSN\n"));
 321                 ldb_transaction_cancel(ldb);
 322                 return WERR_FOOBAR;
 323         }
 324
 325         /* if this replication partner didn't need to be notified
 326            before this transaction then it still doesn't need to be
 327            notified, as the changes came from this server */
 328         if (seq_num2 > seq_num1 && seq_num1 <= *notify_uSN) {
 329                 *notify_uSN = seq_num2;
 330         }
 331
 332         ret = ldb_transaction_commit(ldb);
 333         if (ret != LDB_SUCCESS) {
 334                 DEBUG(0,(__location__ " Failed to commit transaction\n"));
 335                 return WERR_FOOBAR;
 336         }
 337
 338
 339         DEBUG(2,("Replicated %u objects (%u linked attributes) for %s\n",
 340                  objects->num_objects, objects->linked_attributes_count,
 341                  ldb_dn_get_linearized(objects->partition_dn)));
 342
 343         return WERR_OK;
 344 }
 345
 346 static WERROR dsdb_convert_object(struct ldb_context *ldb,
 347                                   const struct dsdb_schema *schema,
 348                                   const struct drsuapi_DsReplicaObjectListItem *in,
 349                                   TALLOC_CTX *mem_ctx,
 350                                   struct ldb_message **_msg)
 351 {
 352         WERROR status;
 353         unsigned int i;
 354         struct ldb_message *msg;
 355
 356         if (!in->object.identifier) {
 357                 return WERR_FOOBAR;
 358         }
 359
 360         if (!in->object.identifier->dn || !in->object.identifier->dn[0]) {
 361                 return WERR_FOOBAR;
 362         }
 363
 364         msg = ldb_msg_new(mem_ctx);
 365         W_ERROR_HAVE_NO_MEMORY(msg);
 366
 367         msg->dn = ldb_dn_new(msg, ldb, in->object.identifier->dn);
 368         W_ERROR_HAVE_NO_MEMORY(msg->dn);
 369
 370         msg->num_elements       = in->object.attribute_ctr.num_attributes;
 371         msg->elements           = talloc_array(msg, struct ldb_message_element,
 372                                                msg->num_elements);
 373         W_ERROR_HAVE_NO_MEMORY(msg->elements);
 374
 375         for (i=0; i < msg->num_elements; i++) {
 376                 struct drsuapi_DsReplicaAttribute *a;
 377                 struct ldb_message_element *e;
 378
 379                 a = &in->object.attribute_ctr.attributes[i];
 380                 e = &msg->elements[i];
 381
 382                 status = dsdb_attribute_drsuapi_to_ldb(ldb, schema, a, msg->elements, e);
 383                 W_ERROR_NOT_OK_RETURN(status);
 384         }
 385
 386
 387         *_msg = msg;
 388
 389         return WERR_OK;
 390 }
 391
 392 WERROR dsdb_origin_objects_commit(struct ldb_context *ldb,
 393                                   TALLOC_CTX *mem_ctx,
 394                                   const struct drsuapi_DsReplicaObjectListItem *first_object,
 395                                   uint32_t *_num,
 396                                   struct drsuapi_DsReplicaObjectIdentifier2 **_ids)
 397 {
 398         WERROR status;
 399         const struct dsdb_schema *schema;
 400         const struct drsuapi_DsReplicaObjectListItem *cur;
 401         struct ldb_message **objects;
 402         struct drsuapi_DsReplicaObjectIdentifier2 *ids;
 403         uint32_t i;
 404         uint32_t num_objects = 0;
 405         const char * const attrs[] = {
 406                 "objectGUID",
 407                 "objectSid",
 408                 NULL
 409         };
 410         struct ldb_result *res;
 411         int ret;
 412
 413         for (cur = first_object; cur; cur = cur->next_object) {
 414                 num_objects++;
 415         }
 416
 417         if (num_objects == 0) {
 418                 return WERR_OK;
 419         }
 420
 421         ret = ldb_transaction_start(ldb);
 422         if (ret != LDB_SUCCESS) {
 423                 return WERR_DS_INTERNAL_FAILURE;
 424         }
 425
 426         objects = talloc_array(mem_ctx, struct ldb_message *,
 427                                num_objects);
 428         if (objects == NULL) {
 429                 status = WERR_NOMEM;
 430                 goto cancel;
 431         }
 432
 433         schema = dsdb_get_schema(ldb, objects);
 434         if (!schema) {
 435                 return WERR_DS_SCHEMA_NOT_LOADED;
 436         }
 437
 438         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 439                 status = dsdb_convert_object(ldb, schema,
 440                                              cur, objects, &objects[i]);
 441                 if (!W_ERROR_IS_OK(status)) {
 442                         goto cancel;
 443                 }
 444         }
 445
 446         ids = talloc_array(mem_ctx,
 447                            struct drsuapi_DsReplicaObjectIdentifier2,
 448                            num_objects);
 449         if (ids == NULL) {
 450                 status = WERR_NOMEM;
 451                 goto cancel;
 452         }
 453
 454         for (i=0; i < num_objects; i++) {
 455                 struct dom_sid *sid = NULL;
 456                 struct ldb_request *add_req;
 457
 458                 DEBUG(6,(__location__ ": adding %s\n",
 459                          ldb_dn_get_linearized(objects[i]->dn)));
 460
 461                 ret = ldb_build_add_req(&add_req,
 462                                         ldb,
 463                                         objects,
 464                                         objects[i],
 465                                         NULL,
 466                                         NULL,
 467                                         ldb_op_default_callback,
 468                                         NULL);
 469                 if (ret != LDB_SUCCESS) {
 470                         status = WERR_DS_INTERNAL_FAILURE;
 471                         goto cancel;
 472                 }
 473
 474                 ret = ldb_request_add_control(add_req, LDB_CONTROL_RELAX_OID, true, NULL);
 475                 if (ret != LDB_SUCCESS) {
 476                         status = WERR_DS_INTERNAL_FAILURE;
 477                         goto cancel;
 478                 }
 479
 480                 ret = ldb_request(ldb, add_req);
 481                 if (ret == LDB_SUCCESS) {
 482                         ret = ldb_wait(add_req->handle, LDB_WAIT_ALL);
 483                 }
 484                 if (ret != LDB_SUCCESS) {
 485                         DEBUG(0,(__location__ ": Failed add of %s - %s\n",
 486                                  ldb_dn_get_linearized(objects[i]->dn), ldb_errstring(ldb)));
 487                         status = WERR_DS_INTERNAL_FAILURE;
 488                         goto cancel;
 489                 }
 490
 491                 talloc_free(add_req);
 492
 493                 ret = ldb_search(ldb, objects, &res, objects[i]->dn,
 494                                  LDB_SCOPE_BASE, attrs,
 495                                  "(objectClass=*)");
 496                 if (ret != LDB_SUCCESS) {
 497                         status = WERR_DS_INTERNAL_FAILURE;
 498                         goto cancel;
 499                 }
 500                 ids[i].guid = samdb_result_guid(res->msgs[0], "objectGUID");
 501                 sid = samdb_result_dom_sid(objects, res->msgs[0], "objectSid");
 502                 if (sid) {
 503                         ids[i].sid = *sid;
 504                 } else {
 505                         ZERO_STRUCT(ids[i].sid);
 506                 }
 507         }
 508
 509         ret = ldb_transaction_commit(ldb);
 510         if (ret != LDB_SUCCESS) {
 511                 return WERR_DS_INTERNAL_FAILURE;
 512         }
 513
 514         talloc_free(objects);
 515
 516         *_num = num_objects;
 517         *_ids = ids;
 518         return WERR_OK;
 519
 520 cancel:
 521         talloc_free(objects);
 522         ldb_transaction_cancel(ldb);
 523         return status;
 524 }