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 static 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         enum ndr_err_code ndr_err;
  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                 int 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, a, msg->elements, e);
 132                 W_ERROR_NOT_OK_RETURN(status);
 133
 134                 m->attid                        = a->attid;
 135                 m->version                      = d->version;
 136                 m->originating_change_time      = d->originating_change_time;
 137                 m->originating_invocation_id    = d->originating_invocation_id;
 138                 m->originating_usn              = d->originating_usn;
 139                 m->local_usn                    = 0;
 140
 141                 if (d->originating_change_time > whenChanged) {
 142                         whenChanged = d->originating_change_time;
 143                 }
 144
 145                 if (a->attid == DRSUAPI_ATTRIBUTE_name) {
 146                         name_a = a;
 147                         name_d = d;
 148                         rdn_m = &md->ctr.ctr1.array[md->ctr.ctr1.count];
 149                 }
 150         }
 151
 152         if (rdn_m) {
 153                 struct ldb_message_element *el;
 154                 el = ldb_msg_find_element(msg, rdn_attr->lDAPDisplayName);
 155                 if (!el) {
 156                         /* we assume that the RDN has prefix "CN" */
 157                         ret = ldb_msg_add_string(msg, rdn_attr->lDAPDisplayName,
 158                                 samdb_cn_to_lDAPDisplayName(mem_ctx,
 159                                         (const char *) rdn_value->data));
 160                         if (ret != LDB_SUCCESS) {
 161                                 return WERR_FOOBAR;
 162                         }
 163                 } else {
 164                         if (el->num_values != 1) {
 165                                 DEBUG(0,(__location__ ": Unexpected num_values=%u\n",
 166                                          el->num_values));
 167                                 return WERR_FOOBAR;
 168                         }
 169                         if (!ldb_val_equal_exact(&el->values[0], rdn_value)) {
 170                                 DEBUG(0,(__location__ ": RDN value changed? '%*.*s' '%*.*s'\n",
 171                                          (int)el->values[0].length, (int)el->values[0].length, el->values[0].data,
 172                                          (int)rdn_value->length, (int)rdn_value->length, rdn_value->data));
 173                                 return WERR_FOOBAR;
 174                         }
 175                 }
 176
 177                 rdn_m->attid                            = rdn_attid;
 178                 rdn_m->version                          = name_d->version;
 179                 rdn_m->originating_change_time          = name_d->originating_change_time;
 180                 rdn_m->originating_invocation_id        = name_d->originating_invocation_id;
 181                 rdn_m->originating_usn                  = name_d->originating_usn;
 182                 rdn_m->local_usn                        = 0;
 183                 md->ctr.ctr1.count++;
 184
 185         }
 186
 187         whenChanged_t = nt_time_to_unix(whenChanged);
 188         whenChanged_s = ldb_timestring(msg, whenChanged_t);
 189         W_ERROR_HAVE_NO_MEMORY(whenChanged_s);
 190
 191         ndr_err = ndr_push_struct_blob(&guid_value, msg,
 192                                        lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
 193                                        &in->object.identifier->guid,
 194                                          (ndr_push_flags_fn_t)ndr_push_GUID);
 195         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 196                 nt_status = ndr_map_error2ntstatus(ndr_err);
 197                 return ntstatus_to_werror(nt_status);
 198         }
 199
 200         out->msg                = msg;
 201         out->guid_value         = guid_value;
 202         out->when_changed       = whenChanged_s;
 203         out->meta_data          = md;
 204         return WERR_OK;
 205 }
 206
 207 WERROR dsdb_extended_replicated_objects_convert(struct ldb_context *ldb,
 208                                                 const char *partition_dn,
 209                                                 const struct drsuapi_DsReplicaOIDMapping_Ctr *mapping_ctr,
 210                                                 uint32_t object_count,
 211                                                 const struct drsuapi_DsReplicaObjectListItemEx *first_object,
 212                                                 uint32_t linked_attributes_count,
 213                                                 const struct drsuapi_DsReplicaLinkedAttribute *linked_attributes,
 214                                                 const struct repsFromTo1 *source_dsa,
 215                                                 const struct drsuapi_DsReplicaCursor2CtrEx *uptodateness_vector,
 216                                                 const DATA_BLOB *gensec_skey,
 217                                                 TALLOC_CTX *mem_ctx,
 218                                                 struct dsdb_extended_replicated_objects **objects)
 219 {
 220         WERROR status;
 221         const struct dsdb_schema *schema;
 222         struct dsdb_extended_replicated_objects *out;
 223         const struct drsuapi_DsReplicaObjectListItemEx *cur;
 224         uint32_t i;
 225
 226         schema = dsdb_get_schema(ldb);
 227         if (!schema) {
 228                 return WERR_DS_SCHEMA_NOT_LOADED;
 229         }
 230
 231         status = dsdb_schema_pfm_contains_drsuapi_pfm(schema->prefixmap, mapping_ctr);
 232         W_ERROR_NOT_OK_RETURN(status);
 233
 234         out = talloc_zero(mem_ctx, struct dsdb_extended_replicated_objects);
 235         W_ERROR_HAVE_NO_MEMORY(out);
 236         out->version            = DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION;
 237
 238         out->partition_dn       = ldb_dn_new(out, ldb, partition_dn);
 239         W_ERROR_HAVE_NO_MEMORY(out->partition_dn);
 240
 241         out->source_dsa         = source_dsa;
 242         out->uptodateness_vector= uptodateness_vector;
 243
 244         out->num_objects        = object_count;
 245         out->objects            = talloc_array(out,
 246                                                struct dsdb_extended_replicated_object,
 247                                                out->num_objects);
 248         W_ERROR_HAVE_NO_MEMORY(out->objects);
 249
 250         /* pass the linked attributes down to the repl_meta_data
 251            module */
 252         out->linked_attributes_count = linked_attributes_count;
 253         out->linked_attributes       = linked_attributes;
 254
 255         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 256                 if (i == out->num_objects) {
 257                         return WERR_FOOBAR;
 258                 }
 259
 260                 status = dsdb_convert_object_ex(ldb, schema,
 261                                                 cur, gensec_skey,
 262                                                 out->objects, &out->objects[i]);
 263                 if (!W_ERROR_IS_OK(status)) {
 264                         DEBUG(0,("Failed to convert object %s\n", cur->object.identifier->dn));
 265                         return status;
 266                 }
 267         }
 268         if (i != out->num_objects) {
 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);
 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\n"));
 314                 return WERR_FOOBAR;
 315         }
 316
 317         ret = dsdb_load_partition_usn(ldb, objects->partition_dn, &seq_num2);
 318         if (ret != LDB_SUCCESS) {
 319                 DEBUG(0,(__location__ " Failed to load partition uSN\n"));
 320                 ldb_transaction_cancel(ldb);
 321                 return WERR_FOOBAR;
 322         }
 323
 324         /* if this replication partner didn't need to be notified
 325            before this transaction then it still doesn't need to be
 326            notified, as the changes came from this server */
 327         if (seq_num2 > seq_num1 && seq_num1 <= *notify_uSN) {
 328                 *notify_uSN = seq_num2;
 329         }
 330
 331         ret = ldb_transaction_commit(ldb);
 332         if (ret != LDB_SUCCESS) {
 333                 DEBUG(0,(__location__ " Failed to commit transaction\n"));
 334                 return WERR_FOOBAR;
 335         }
 336
 337
 338         DEBUG(2,("Replicated %u objects (%u linked attributes) for %s\n",
 339                  objects->num_objects, objects->linked_attributes_count,
 340                  ldb_dn_get_linearized(objects->partition_dn)));
 341
 342         return WERR_OK;
 343 }
 344
 345 static WERROR dsdb_convert_object(struct ldb_context *ldb,
 346                                   const struct dsdb_schema *schema,
 347                                   const struct drsuapi_DsReplicaObjectListItem *in,
 348                                   TALLOC_CTX *mem_ctx,
 349                                   struct ldb_message **_msg)
 350 {
 351         WERROR status;
 352         uint32_t i;
 353         struct ldb_message *msg;
 354
 355         if (!in->object.identifier) {
 356                 return WERR_FOOBAR;
 357         }
 358
 359         if (!in->object.identifier->dn || !in->object.identifier->dn[0]) {
 360                 return WERR_FOOBAR;
 361         }
 362
 363         msg = ldb_msg_new(mem_ctx);
 364         W_ERROR_HAVE_NO_MEMORY(msg);
 365
 366         msg->dn = ldb_dn_new(msg, ldb, in->object.identifier->dn);
 367         W_ERROR_HAVE_NO_MEMORY(msg->dn);
 368
 369         msg->num_elements       = in->object.attribute_ctr.num_attributes;
 370         msg->elements           = talloc_array(msg, struct ldb_message_element,
 371                                                msg->num_elements);
 372         W_ERROR_HAVE_NO_MEMORY(msg->elements);
 373
 374         for (i=0; i < msg->num_elements; i++) {
 375                 struct drsuapi_DsReplicaAttribute *a;
 376                 struct ldb_message_element *e;
 377
 378                 a = &in->object.attribute_ctr.attributes[i];
 379                 e = &msg->elements[i];
 380
 381                 status = dsdb_attribute_drsuapi_to_ldb(ldb, schema, a, msg->elements, e);
 382                 W_ERROR_NOT_OK_RETURN(status);
 383         }
 384
 385
 386         *_msg = msg;
 387
 388         return WERR_OK;
 389 }
 390
 391 WERROR dsdb_origin_objects_commit(struct ldb_context *ldb,
 392                                   TALLOC_CTX *mem_ctx,
 393                                   const struct drsuapi_DsReplicaObjectListItem *first_object,
 394                                   uint32_t *_num,
 395                                   struct drsuapi_DsReplicaObjectIdentifier2 **_ids)
 396 {
 397         WERROR status;
 398         const struct dsdb_schema *schema;
 399         const struct drsuapi_DsReplicaObjectListItem *cur;
 400         struct ldb_message **objects;
 401         struct drsuapi_DsReplicaObjectIdentifier2 *ids;
 402         uint32_t i;
 403         uint32_t num_objects = 0;
 404         const char * const attrs[] = {
 405                 "objectGUID",
 406                 "objectSid",
 407                 NULL
 408         };
 409         struct ldb_result *res;
 410         int ret;
 411
 412         schema = dsdb_get_schema(ldb);
 413         if (!schema) {
 414                 return WERR_DS_SCHEMA_NOT_LOADED;
 415         }
 416
 417         for (cur = first_object; cur; cur = cur->next_object) {
 418                 num_objects++;
 419         }
 420
 421         if (num_objects == 0) {
 422                 return WERR_OK;
 423         }
 424
 425         ret = ldb_transaction_start(ldb);
 426         if (ret != LDB_SUCCESS) {
 427                 return WERR_DS_INTERNAL_FAILURE;
 428         }
 429
 430         objects = talloc_array(mem_ctx, struct ldb_message *,
 431                                num_objects);
 432         if (objects == NULL) {
 433                 status = WERR_NOMEM;
 434                 goto cancel;
 435         }
 436
 437         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 438                 status = dsdb_convert_object(ldb, schema,
 439                                              cur, objects, &objects[i]);
 440                 if (!W_ERROR_IS_OK(status)) {
 441                         goto cancel;
 442                 }
 443         }
 444
 445         ids = talloc_array(mem_ctx,
 446                            struct drsuapi_DsReplicaObjectIdentifier2,
 447                            num_objects);
 448         if (ids == NULL) {
 449                 status = WERR_NOMEM;
 450                 goto cancel;
 451         }
 452
 453         for (i=0; i < num_objects; i++) {
 454                 struct dom_sid *sid = NULL;
 455                 struct ldb_request *add_req;
 456
 457                 DEBUG(6,(__location__ ": adding %s\n",
 458                          ldb_dn_get_linearized(objects[i]->dn)));
 459
 460                 ret = ldb_build_add_req(&add_req,
 461                                         ldb,
 462                                         objects,
 463                                         objects[i],
 464                                         NULL,
 465                                         NULL,
 466                                         ldb_op_default_callback,
 467                                         NULL);
 468                 if (ret != LDB_SUCCESS) {
 469                         status = WERR_DS_INTERNAL_FAILURE;
 470                         goto cancel;
 471                 }
 472
 473                 ret = ldb_request_add_control(add_req, LDB_CONTROL_RELAX_OID, true, NULL);
 474                 if (ret != LDB_SUCCESS) {
 475                         status = WERR_DS_INTERNAL_FAILURE;
 476                         goto cancel;
 477                 }
 478
 479                 ret = ldb_request(ldb, add_req);
 480                 if (ret == LDB_SUCCESS) {
 481                         ret = ldb_wait(add_req->handle, LDB_WAIT_ALL);
 482                 }
 483                 if (ret != LDB_SUCCESS) {
 484                         DEBUG(0,(__location__ ": Failed add of %s - %s\n",
 485                                  ldb_dn_get_linearized(objects[i]->dn), ldb_errstring(ldb)));
 486                         status = WERR_DS_INTERNAL_FAILURE;
 487                         goto cancel;
 488                 }
 489
 490                 talloc_free(add_req);
 491
 492                 ret = ldb_search(ldb, objects, &res, objects[i]->dn,
 493                                  LDB_SCOPE_BASE, attrs,
 494                                  "(objectClass=*)");
 495                 if (ret != LDB_SUCCESS) {
 496                         status = WERR_DS_INTERNAL_FAILURE;
 497                         goto cancel;
 498                 }
 499                 ids[i].guid = samdb_result_guid(res->msgs[0], "objectGUID");
 500                 sid = samdb_result_dom_sid(objects, res->msgs[0], "objectSid");
 501                 if (sid) {
 502                         ids[i].sid = *sid;
 503                 } else {
 504                         ZERO_STRUCT(ids[i].sid);
 505                 }
 506         }
 507
 508         ret = ldb_transaction_commit(ldb);
 509         if (ret != LDB_SUCCESS) {
 510                 return WERR_DS_INTERNAL_FAILURE;
 511         }
 512
 513         talloc_free(objects);
 514
 515         *_num = num_objects;
 516         *_ids = ids;
 517         return WERR_OK;
 518
 519 cancel:
 520         talloc_free(objects);
 521         ldb_transaction_cancel(ldb);
 522         return status;
 523 }