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 dsdb_schema_prefixmap *pfm_remote,
  37                               const struct drsuapi_DsReplicaObjectListItemEx *in,
  38                               const DATA_BLOB *gensec_skey,
  39                               TALLOC_CTX *mem_ctx,
  40                               struct dsdb_extended_replicated_object *out)
  41 {
  42         NTSTATUS nt_status;
  43         WERROR status;
  44         uint32_t i;
  45         struct ldb_message *msg;
  46         struct replPropertyMetaDataBlob *md;
  47         struct ldb_val guid_value;
  48         NTTIME whenChanged = 0;
  49         time_t whenChanged_t;
  50         const char *whenChanged_s;
  51         const char *rdn_name = NULL;
  52         const struct ldb_val *rdn_value = NULL;
  53         const struct dsdb_attribute *rdn_attr = NULL;
  54         uint32_t rdn_attid;
  55         struct drsuapi_DsReplicaAttribute *name_a = NULL;
  56         struct drsuapi_DsReplicaMetaData *name_d = NULL;
  57         struct replPropertyMetaData1 *rdn_m = NULL;
  58         struct dom_sid *sid = NULL;
  59         uint32_t rid = 0;
  60         int ret;
  61
  62         if (!in->object.identifier) {
  63                 return WERR_FOOBAR;
  64         }
  65
  66         if (!in->object.identifier->dn || !in->object.identifier->dn[0]) {
  67                 return WERR_FOOBAR;
  68         }
  69
  70         if (in->object.attribute_ctr.num_attributes != 0 && !in->meta_data_ctr) {
  71                 return WERR_FOOBAR;
  72         }
  73
  74         if (in->object.attribute_ctr.num_attributes != in->meta_data_ctr->count) {
  75                 return WERR_FOOBAR;
  76         }
  77
  78         sid = &in->object.identifier->sid;
  79         if (sid->num_auths > 0) {
  80                 rid = sid->sub_auths[sid->num_auths - 1];
  81         }
  82
  83         msg = ldb_msg_new(mem_ctx);
  84         W_ERROR_HAVE_NO_MEMORY(msg);
  85
  86         msg->dn                 = ldb_dn_new(msg, ldb, in->object.identifier->dn);
  87         W_ERROR_HAVE_NO_MEMORY(msg->dn);
  88
  89         rdn_name        = ldb_dn_get_rdn_name(msg->dn);
  90         rdn_attr        = dsdb_attribute_by_lDAPDisplayName(schema, rdn_name);
  91         if (!rdn_attr) {
  92                 return WERR_FOOBAR;
  93         }
  94         rdn_attid       = rdn_attr->attributeID_id;
  95         rdn_value       = ldb_dn_get_rdn_val(msg->dn);
  96
  97         msg->num_elements       = in->object.attribute_ctr.num_attributes;
  98         msg->elements           = talloc_array(msg, struct ldb_message_element,
  99                                                msg->num_elements);
 100         W_ERROR_HAVE_NO_MEMORY(msg->elements);
 101
 102         md = talloc(mem_ctx, struct replPropertyMetaDataBlob);
 103         W_ERROR_HAVE_NO_MEMORY(md);
 104
 105         md->version             = 1;
 106         md->reserved            = 0;
 107         md->ctr.ctr1.count      = in->meta_data_ctr->count;
 108         md->ctr.ctr1.reserved   = 0;
 109         md->ctr.ctr1.array      = talloc_array(mem_ctx,
 110                                                struct replPropertyMetaData1,
 111                                                md->ctr.ctr1.count + 1); /* +1 because of the RDN attribute */
 112         W_ERROR_HAVE_NO_MEMORY(md->ctr.ctr1.array);
 113
 114         for (i=0; i < in->meta_data_ctr->count; i++) {
 115                 struct drsuapi_DsReplicaAttribute *a;
 116                 struct drsuapi_DsReplicaMetaData *d;
 117                 struct replPropertyMetaData1 *m;
 118                 struct ldb_message_element *e;
 119                 uint32_t j;
 120
 121                 a = &in->object.attribute_ctr.attributes[i];
 122                 d = &in->meta_data_ctr->meta_data[i];
 123                 m = &md->ctr.ctr1.array[i];
 124                 e = &msg->elements[i];
 125
 126                 for (j=0; j<a->value_ctr.num_values; j++) {
 127                         status = drsuapi_decrypt_attribute(a->value_ctr.values[j].blob, gensec_skey, rid, a);
 128                         W_ERROR_NOT_OK_RETURN(status);
 129                 }
 130
 131                 status = dsdb_attribute_drsuapi_to_ldb(ldb, schema, pfm_remote,
 132                                                        a, msg->elements, e);
 133                 W_ERROR_NOT_OK_RETURN(status);
 134
 135                 m->attid                        = a->attid;
 136                 m->version                      = d->version;
 137                 m->originating_change_time      = d->originating_change_time;
 138                 m->originating_invocation_id    = d->originating_invocation_id;
 139                 m->originating_usn              = d->originating_usn;
 140                 m->local_usn                    = 0;
 141
 142                 if (d->originating_change_time > whenChanged) {
 143                         whenChanged = d->originating_change_time;
 144                 }
 145
 146                 if (a->attid == DRSUAPI_ATTID_name) {
 147                         name_a = a;
 148                         name_d = d;
 149                         rdn_m = &md->ctr.ctr1.array[md->ctr.ctr1.count];
 150                 }
 151         }
 152
 153         if (rdn_m) {
 154                 struct ldb_message_element *el;
 155                 el = ldb_msg_find_element(msg, rdn_attr->lDAPDisplayName);
 156                 if (!el) {
 157                         ret = ldb_msg_add_value(msg, rdn_attr->lDAPDisplayName, rdn_value, NULL);
 158                         if (ret != LDB_SUCCESS) {
 159                                 return WERR_FOOBAR;
 160                         }
 161                 } else {
 162                         if (el->num_values != 1) {
 163                                 DEBUG(0,(__location__ ": Unexpected num_values=%u\n",
 164                                          el->num_values));
 165                                 return WERR_FOOBAR;
 166                         }
 167                         if (!ldb_val_equal_exact(&el->values[0], rdn_value)) {
 168                                 DEBUG(0,(__location__ ": RDN value changed? '%*.*s' '%*.*s'\n",
 169                                          (int)el->values[0].length, (int)el->values[0].length, el->values[0].data,
 170                                          (int)rdn_value->length, (int)rdn_value->length, rdn_value->data));
 171                                 return WERR_FOOBAR;
 172                         }
 173                 }
 174
 175                 rdn_m->attid                            = rdn_attid;
 176                 rdn_m->version                          = name_d->version;
 177                 rdn_m->originating_change_time          = name_d->originating_change_time;
 178                 rdn_m->originating_invocation_id        = name_d->originating_invocation_id;
 179                 rdn_m->originating_usn                  = name_d->originating_usn;
 180                 rdn_m->local_usn                        = 0;
 181                 md->ctr.ctr1.count++;
 182
 183         }
 184
 185         whenChanged_t = nt_time_to_unix(whenChanged);
 186         whenChanged_s = ldb_timestring(msg, whenChanged_t);
 187         W_ERROR_HAVE_NO_MEMORY(whenChanged_s);
 188
 189         nt_status = GUID_to_ndr_blob(&in->object.identifier->guid, msg, &guid_value);
 190         if (!NT_STATUS_IS_OK(nt_status)) {
 191                 return ntstatus_to_werror(nt_status);
 192         }
 193
 194         out->msg                = msg;
 195         out->guid_value         = guid_value;
 196         out->when_changed       = whenChanged_s;
 197         out->meta_data          = md;
 198         return WERR_OK;
 199 }
 200
 201 WERROR dsdb_replicated_objects_convert(struct ldb_context *ldb,
 202                                        const struct dsdb_schema *schema,
 203                                        const char *partition_dn_str,
 204                                        const struct drsuapi_DsReplicaOIDMapping_Ctr *mapping_ctr,
 205                                        uint32_t object_count,
 206                                        const struct drsuapi_DsReplicaObjectListItemEx *first_object,
 207                                        uint32_t linked_attributes_count,
 208                                        const struct drsuapi_DsReplicaLinkedAttribute *linked_attributes,
 209                                        const struct repsFromTo1 *source_dsa,
 210                                        const struct drsuapi_DsReplicaCursor2CtrEx *uptodateness_vector,
 211                                        const DATA_BLOB *gensec_skey,
 212                                        TALLOC_CTX *mem_ctx,
 213                                        struct dsdb_extended_replicated_objects **objects)
 214 {
 215         WERROR status;
 216         struct ldb_dn *partition_dn;
 217         struct dsdb_schema_prefixmap *pfm_remote;
 218         struct dsdb_extended_replicated_objects *out;
 219         const struct drsuapi_DsReplicaObjectListItemEx *cur;
 220         uint32_t i;
 221
 222         out = talloc_zero(mem_ctx, struct dsdb_extended_replicated_objects);
 223         W_ERROR_HAVE_NO_MEMORY(out);
 224         out->version            = DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION;
 225
 226         /*
 227          * Ensure schema is kept valid for as long as 'out'
 228          * which may contain pointers to it
 229          */
 230         talloc_reference(out, schema);
 231
 232         partition_dn = ldb_dn_new(out, ldb, partition_dn_str);
 233         W_ERROR_HAVE_NO_MEMORY_AND_FREE(partition_dn, out);
 234
 235         status = dsdb_schema_pfm_from_drsuapi_pfm(mapping_ctr, true,
 236                                                   out, &pfm_remote, NULL);
 237         if (!W_ERROR_IS_OK(status)) {
 238                 DEBUG(0,(__location__ ": Failed to decode remote prefixMap: %s",
 239                          win_errstr(status)));
 240                 talloc_free(out);
 241                 return status;
 242         }
 243
 244         if (ldb_dn_compare(partition_dn, ldb_get_schema_basedn(ldb)) != 0) {
 245                 /*
 246                  * check for schema changes in case
 247                  * we are not replicating Schema NC
 248                  */
 249                 status = dsdb_schema_info_cmp(schema, mapping_ctr);
 250                 if (!W_ERROR_IS_OK(status)) {
 251                         DEBUG(1,("Remote schema has changed while replicating %s\n",
 252                                  partition_dn_str));
 253                         talloc_free(out);
 254                         return status;
 255                 }
 256         }
 257
 258         out->partition_dn       = partition_dn;
 259
 260         out->source_dsa         = source_dsa;
 261         out->uptodateness_vector= uptodateness_vector;
 262
 263         out->num_objects        = object_count;
 264         out->objects            = talloc_array(out,
 265                                                struct dsdb_extended_replicated_object,
 266                                                out->num_objects);
 267         W_ERROR_HAVE_NO_MEMORY_AND_FREE(out->objects, out);
 268
 269         /* pass the linked attributes down to the repl_meta_data
 270            module */
 271         out->linked_attributes_count = linked_attributes_count;
 272         out->linked_attributes       = linked_attributes;
 273
 274         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 275                 if (i == out->num_objects) {
 276                         talloc_free(out);
 277                         return WERR_FOOBAR;
 278                 }
 279
 280                 status = dsdb_convert_object_ex(ldb, schema, pfm_remote,
 281                                                 cur, gensec_skey,
 282                                                 out->objects, &out->objects[i]);
 283                 if (!W_ERROR_IS_OK(status)) {
 284                         talloc_free(out);
 285                         DEBUG(0,("Failed to convert object %s: %s\n",
 286                                  cur->object.identifier->dn,
 287                                  win_errstr(status)));
 288                         return status;
 289                 }
 290         }
 291         if (i != out->num_objects) {
 292                 talloc_free(out);
 293                 return WERR_FOOBAR;
 294         }
 295
 296         /* free pfm_remote, we won't need it anymore */
 297         talloc_free(pfm_remote);
 298
 299         *objects = out;
 300         return WERR_OK;
 301 }
 302
 303 WERROR dsdb_replicated_objects_commit(struct ldb_context *ldb,
 304                                       struct dsdb_extended_replicated_objects *objects,
 305                                       uint64_t *notify_uSN)
 306 {
 307         struct ldb_result *ext_res;
 308         int ret;
 309         uint64_t seq_num1, seq_num2;
 310
 311         /* TODO: handle linked attributes */
 312
 313         /* wrap the extended operation in a transaction
 314            See [MS-DRSR] 3.3.2 Transactions
 315          */
 316         ret = ldb_transaction_start(ldb);
 317         if (ret != LDB_SUCCESS) {
 318                 DEBUG(0,(__location__ " Failed to start transaction\n"));
 319                 return WERR_FOOBAR;
 320         }
 321
 322         ret = dsdb_load_partition_usn(ldb, objects->partition_dn, &seq_num1, NULL);
 323         if (ret != LDB_SUCCESS) {
 324                 DEBUG(0,(__location__ " Failed to load partition uSN\n"));
 325                 ldb_transaction_cancel(ldb);
 326                 return WERR_FOOBAR;
 327         }
 328
 329         ret = ldb_extended(ldb, DSDB_EXTENDED_REPLICATED_OBJECTS_OID, objects, &ext_res);
 330         if (ret != LDB_SUCCESS) {
 331                 DEBUG(0,("Failed to apply records: %s: %s\n",
 332                          ldb_errstring(ldb), ldb_strerror(ret)));
 333                 ldb_transaction_cancel(ldb);
 334                 return WERR_FOOBAR;
 335         }
 336         talloc_free(ext_res);
 337
 338         ret = ldb_transaction_prepare_commit(ldb);
 339         if (ret != LDB_SUCCESS) {
 340                 DEBUG(0,(__location__ " Failed to prepare commit of transaction: %s\n",
 341                          ldb_errstring(ldb)));
 342                 return WERR_FOOBAR;
 343         }
 344
 345         ret = dsdb_load_partition_usn(ldb, objects->partition_dn, &seq_num2, NULL);
 346         if (ret != LDB_SUCCESS) {
 347                 DEBUG(0,(__location__ " Failed to load partition uSN\n"));
 348                 ldb_transaction_cancel(ldb);
 349                 return WERR_FOOBAR;
 350         }
 351
 352         /* if this replication partner didn't need to be notified
 353            before this transaction then it still doesn't need to be
 354            notified, as the changes came from this server */
 355         if (seq_num2 > seq_num1 && seq_num1 <= *notify_uSN) {
 356                 *notify_uSN = seq_num2;
 357         }
 358
 359         ret = ldb_transaction_commit(ldb);
 360         if (ret != LDB_SUCCESS) {
 361                 DEBUG(0,(__location__ " Failed to commit transaction\n"));
 362                 return WERR_FOOBAR;
 363         }
 364
 365
 366         DEBUG(2,("Replicated %u objects (%u linked attributes) for %s\n",
 367                  objects->num_objects, objects->linked_attributes_count,
 368                  ldb_dn_get_linearized(objects->partition_dn)));
 369
 370         return WERR_OK;
 371 }
 372
 373 static WERROR dsdb_origin_object_convert(struct ldb_context *ldb,
 374                                          const struct dsdb_schema *schema,
 375                                          const struct drsuapi_DsReplicaObjectListItem *in,
 376                                          TALLOC_CTX *mem_ctx,
 377                                          struct ldb_message **_msg)
 378 {
 379         WERROR status;
 380         unsigned int i;
 381         struct ldb_message *msg;
 382
 383         if (!in->object.identifier) {
 384                 return WERR_FOOBAR;
 385         }
 386
 387         if (!in->object.identifier->dn || !in->object.identifier->dn[0]) {
 388                 return WERR_FOOBAR;
 389         }
 390
 391         msg = ldb_msg_new(mem_ctx);
 392         W_ERROR_HAVE_NO_MEMORY(msg);
 393
 394         msg->dn = ldb_dn_new(msg, ldb, in->object.identifier->dn);
 395         W_ERROR_HAVE_NO_MEMORY(msg->dn);
 396
 397         msg->num_elements       = in->object.attribute_ctr.num_attributes;
 398         msg->elements           = talloc_array(msg, struct ldb_message_element,
 399                                                msg->num_elements);
 400         W_ERROR_HAVE_NO_MEMORY(msg->elements);
 401
 402         for (i=0; i < msg->num_elements; i++) {
 403                 struct drsuapi_DsReplicaAttribute *a;
 404                 struct ldb_message_element *e;
 405
 406                 a = &in->object.attribute_ctr.attributes[i];
 407                 e = &msg->elements[i];
 408
 409                 status = dsdb_attribute_drsuapi_to_ldb(ldb, schema, schema->prefixmap,
 410                                                        a, msg->elements, e);
 411                 W_ERROR_NOT_OK_RETURN(status);
 412         }
 413
 414
 415         *_msg = msg;
 416
 417         return WERR_OK;
 418 }
 419
 420 WERROR dsdb_origin_objects_commit(struct ldb_context *ldb,
 421                                   TALLOC_CTX *mem_ctx,
 422                                   const struct drsuapi_DsReplicaObjectListItem *first_object,
 423                                   uint32_t *_num,
 424                                   struct drsuapi_DsReplicaObjectIdentifier2 **_ids)
 425 {
 426         WERROR status;
 427         const struct dsdb_schema *schema;
 428         const struct drsuapi_DsReplicaObjectListItem *cur;
 429         struct ldb_message **objects;
 430         struct drsuapi_DsReplicaObjectIdentifier2 *ids;
 431         uint32_t i;
 432         uint32_t num_objects = 0;
 433         const char * const attrs[] = {
 434                 "objectGUID",
 435                 "objectSid",
 436                 NULL
 437         };
 438         struct ldb_result *res;
 439         int ret;
 440
 441         for (cur = first_object; cur; cur = cur->next_object) {
 442                 num_objects++;
 443         }
 444
 445         if (num_objects == 0) {
 446                 return WERR_OK;
 447         }
 448
 449         ret = ldb_transaction_start(ldb);
 450         if (ret != LDB_SUCCESS) {
 451                 return WERR_DS_INTERNAL_FAILURE;
 452         }
 453
 454         objects = talloc_array(mem_ctx, struct ldb_message *,
 455                                num_objects);
 456         if (objects == NULL) {
 457                 status = WERR_NOMEM;
 458                 goto cancel;
 459         }
 460
 461         schema = dsdb_get_schema(ldb, objects);
 462         if (!schema) {
 463                 return WERR_DS_SCHEMA_NOT_LOADED;
 464         }
 465
 466         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 467                 status = dsdb_origin_object_convert(ldb, schema, cur,
 468                                                     objects, &objects[i]);
 469                 if (!W_ERROR_IS_OK(status)) {
 470                         goto cancel;
 471                 }
 472         }
 473
 474         ids = talloc_array(mem_ctx,
 475                            struct drsuapi_DsReplicaObjectIdentifier2,
 476                            num_objects);
 477         if (ids == NULL) {
 478                 status = WERR_NOMEM;
 479                 goto cancel;
 480         }
 481
 482         for (i=0; i < num_objects; i++) {
 483                 struct dom_sid *sid = NULL;
 484                 struct ldb_request *add_req;
 485
 486                 DEBUG(6,(__location__ ": adding %s\n",
 487                          ldb_dn_get_linearized(objects[i]->dn)));
 488
 489                 ret = ldb_build_add_req(&add_req,
 490                                         ldb,
 491                                         objects,
 492                                         objects[i],
 493                                         NULL,
 494                                         NULL,
 495                                         ldb_op_default_callback,
 496                                         NULL);
 497                 if (ret != LDB_SUCCESS) {
 498                         status = WERR_DS_INTERNAL_FAILURE;
 499                         goto cancel;
 500                 }
 501
 502                 ret = ldb_request_add_control(add_req, LDB_CONTROL_RELAX_OID, true, NULL);
 503                 if (ret != LDB_SUCCESS) {
 504                         status = WERR_DS_INTERNAL_FAILURE;
 505                         goto cancel;
 506                 }
 507
 508                 ret = ldb_request(ldb, add_req);
 509                 if (ret == LDB_SUCCESS) {
 510                         ret = ldb_wait(add_req->handle, LDB_WAIT_ALL);
 511                 }
 512                 if (ret != LDB_SUCCESS) {
 513                         DEBUG(0,(__location__ ": Failed add of %s - %s\n",
 514                                  ldb_dn_get_linearized(objects[i]->dn), ldb_errstring(ldb)));
 515                         status = WERR_DS_INTERNAL_FAILURE;
 516                         goto cancel;
 517                 }
 518
 519                 talloc_free(add_req);
 520
 521                 ret = ldb_search(ldb, objects, &res, objects[i]->dn,
 522                                  LDB_SCOPE_BASE, attrs,
 523                                  "(objectClass=*)");
 524                 if (ret != LDB_SUCCESS) {
 525                         status = WERR_DS_INTERNAL_FAILURE;
 526                         goto cancel;
 527                 }
 528                 ids[i].guid = samdb_result_guid(res->msgs[0], "objectGUID");
 529                 sid = samdb_result_dom_sid(objects, res->msgs[0], "objectSid");
 530                 if (sid) {
 531                         ids[i].sid = *sid;
 532                 } else {
 533                         ZERO_STRUCT(ids[i].sid);
 534                 }
 535         }
 536
 537         ret = ldb_transaction_commit(ldb);
 538         if (ret != LDB_SUCCESS) {
 539                 return WERR_DS_INTERNAL_FAILURE;
 540         }
 541
 542         talloc_free(objects);
 543
 544         *_num = num_objects;
 545         *_ids = ids;
 546         return WERR_OK;
 547
 548 cancel:
 549         talloc_free(objects);
 550         ldb_transaction_cancel(ldb);
 551         return status;
 552 }