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                         ret = ldb_msg_add_value(msg, rdn_attr->lDAPDisplayName, rdn_value, NULL);
 157                         if (ret != LDB_SUCCESS) {
 158                                 return WERR_FOOBAR;
 159                         }
 160                 } else {
 161                         if (el->num_values != 1) {
 162                                 DEBUG(0,(__location__ ": Unexpected num_values=%u\n",
 163                                          el->num_values));
 164                                 return WERR_FOOBAR;
 165                         }
 166                         if (!ldb_val_equal_exact(&el->values[0], rdn_value)) {
 167                                 DEBUG(0,(__location__ ": RDN value changed? '%*.*s' '%*.*s'\n",
 168                                          (int)el->values[0].length, (int)el->values[0].length, el->values[0].data,
 169                                          (int)rdn_value->length, (int)rdn_value->length, rdn_value->data));
 170                                 return WERR_FOOBAR;
 171                         }
 172                 }
 173
 174                 rdn_m->attid                            = rdn_attid;
 175                 rdn_m->version                          = name_d->version;
 176                 rdn_m->originating_change_time          = name_d->originating_change_time;
 177                 rdn_m->originating_invocation_id        = name_d->originating_invocation_id;
 178                 rdn_m->originating_usn                  = name_d->originating_usn;
 179                 rdn_m->local_usn                        = 0;
 180                 md->ctr.ctr1.count++;
 181
 182         }
 183
 184         whenChanged_t = nt_time_to_unix(whenChanged);
 185         whenChanged_s = ldb_timestring(msg, whenChanged_t);
 186         W_ERROR_HAVE_NO_MEMORY(whenChanged_s);
 187
 188         ndr_err = ndr_push_struct_blob(&guid_value, msg,
 189                                        lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
 190                                        &in->object.identifier->guid,
 191                                          (ndr_push_flags_fn_t)ndr_push_GUID);
 192         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 193                 nt_status = ndr_map_error2ntstatus(ndr_err);
 194                 return ntstatus_to_werror(nt_status);
 195         }
 196
 197         out->msg                = msg;
 198         out->guid_value         = guid_value;
 199         out->when_changed       = whenChanged_s;
 200         out->meta_data          = md;
 201         return WERR_OK;
 202 }
 203
 204 WERROR dsdb_extended_replicated_objects_commit(struct ldb_context *ldb,
 205                                                const char *partition_dn,
 206                                                const struct drsuapi_DsReplicaOIDMapping_Ctr *mapping_ctr,
 207                                                uint32_t object_count,
 208                                                const struct drsuapi_DsReplicaObjectListItemEx *first_object,
 209                                                uint32_t linked_attributes_count,
 210                                                const struct drsuapi_DsReplicaLinkedAttribute *linked_attributes,
 211                                                const struct repsFromTo1 *source_dsa,
 212                                                const struct drsuapi_DsReplicaCursor2CtrEx *uptodateness_vector,
 213                                                const DATA_BLOB *gensec_skey,
 214                                                TALLOC_CTX *mem_ctx,
 215                                                struct dsdb_extended_replicated_objects **_out,
 216                                                uint64_t *notify_uSN)
 217 {
 218         WERROR status;
 219         const struct dsdb_schema *schema;
 220         struct dsdb_extended_replicated_objects *out;
 221         struct ldb_result *ext_res;
 222         const struct drsuapi_DsReplicaObjectListItemEx *cur;
 223         uint32_t i;
 224         int ret;
 225         uint64_t seq_num1, seq_num2;
 226
 227         schema = dsdb_get_schema(ldb);
 228         if (!schema) {
 229                 return WERR_DS_SCHEMA_NOT_LOADED;
 230         }
 231
 232         status = dsdb_verify_oid_mappings_drsuapi(schema, mapping_ctr);
 233         W_ERROR_NOT_OK_RETURN(status);
 234
 235         out = talloc_zero(mem_ctx, struct dsdb_extended_replicated_objects);
 236         W_ERROR_HAVE_NO_MEMORY(out);
 237         out->version            = DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION;
 238
 239         out->partition_dn       = ldb_dn_new(out, ldb, partition_dn);
 240         W_ERROR_HAVE_NO_MEMORY(out->partition_dn);
 241
 242         out->source_dsa         = source_dsa;
 243         out->uptodateness_vector= uptodateness_vector;
 244
 245         out->num_objects        = object_count;
 246         out->objects            = talloc_array(out,
 247                                                struct dsdb_extended_replicated_object,
 248                                                out->num_objects);
 249         W_ERROR_HAVE_NO_MEMORY(out->objects);
 250
 251         /* pass the linked attributes down to the repl_meta_data
 252            module */
 253         out->linked_attributes_count = linked_attributes_count;
 254         out->linked_attributes       = linked_attributes;
 255
 256         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 257                 if (i == out->num_objects) {
 258                         return WERR_FOOBAR;
 259                 }
 260
 261                 status = dsdb_convert_object_ex(ldb, schema,
 262                                                 cur, gensec_skey,
 263                                                 out->objects, &out->objects[i]);
 264                 if (!W_ERROR_IS_OK(status)) {
 265                         DEBUG(0,("Failed to convert object %s\n", cur->object.identifier->dn));
 266                         return status;
 267                 }
 268         }
 269         if (i != out->num_objects) {
 270                 return WERR_FOOBAR;
 271         }
 272
 273         /* TODO: handle linked attributes */
 274
 275         /* wrap the extended operation in a transaction
 276            See [MS-DRSR] 3.3.2 Transactions
 277          */
 278         ret = ldb_transaction_start(ldb);
 279         if (ret != LDB_SUCCESS) {
 280                 DEBUG(0,(__location__ " Failed to start transaction\n"));
 281                 talloc_free(out);
 282                 return WERR_FOOBAR;
 283         }
 284
 285         ret = dsdb_load_partition_usn(ldb, out->partition_dn, &seq_num1);
 286         if (ret != LDB_SUCCESS) {
 287                 DEBUG(0,(__location__ " Failed to load partition uSN\n"));
 288                 talloc_free(out);
 289                 ldb_transaction_cancel(ldb);
 290                 return WERR_FOOBAR;
 291         }
 292
 293         ret = ldb_extended(ldb, DSDB_EXTENDED_REPLICATED_OBJECTS_OID, out, &ext_res);
 294         if (ret != LDB_SUCCESS) {
 295                 DEBUG(0,("Failed to apply records: %s: %s\n",
 296                          ldb_errstring(ldb), ldb_strerror(ret)));
 297                 talloc_free(out);
 298                 ldb_transaction_cancel(ldb);
 299                 return WERR_FOOBAR;
 300         }
 301         talloc_free(ext_res);
 302
 303         ret = ldb_transaction_prepare_commit(ldb);
 304         if (ret != LDB_SUCCESS) {
 305                 DEBUG(0,(__location__ " Failed to prepare commit of transaction\n"));
 306                 talloc_free(out);
 307                 return WERR_FOOBAR;
 308         }
 309
 310         ret = dsdb_load_partition_usn(ldb, out->partition_dn, &seq_num2);
 311         if (ret != LDB_SUCCESS) {
 312                 DEBUG(0,(__location__ " Failed to load partition uSN\n"));
 313                 talloc_free(out);
 314                 ldb_transaction_cancel(ldb);
 315                 return WERR_FOOBAR;
 316         }
 317
 318         /* if this replication partner didn't need to be notified
 319            before this transaction then it still doesn't need to be
 320            notified, as the changes came from this server */
 321         if (seq_num2 > seq_num1 && seq_num1 <= *notify_uSN) {
 322                 *notify_uSN = seq_num2;
 323         }
 324
 325         ret = ldb_transaction_commit(ldb);
 326         if (ret != LDB_SUCCESS) {
 327                 DEBUG(0,(__location__ " Failed to commit transaction\n"));
 328                 talloc_free(out);
 329                 return WERR_FOOBAR;
 330         }
 331
 332
 333         DEBUG(2,("Replicated %u objects (%u linked attributes) for %s\n",
 334                  out->num_objects, out->linked_attributes_count,
 335                  ldb_dn_get_linearized(out->partition_dn)));
 336
 337
 338         if (_out) {
 339                 *_out = out;
 340         } else {
 341                 talloc_free(out);
 342         }
 343
 344         return WERR_OK;
 345 }
 346
 347 static WERROR dsdb_convert_object(struct ldb_context *ldb,
 348                                   const struct dsdb_schema *schema,
 349                                   const struct drsuapi_DsReplicaObjectListItem *in,
 350                                   TALLOC_CTX *mem_ctx,
 351                                   struct ldb_message **_msg)
 352 {
 353         WERROR status;
 354         uint32_t i;
 355         struct ldb_message *msg;
 356
 357         if (!in->object.identifier) {
 358                 return WERR_FOOBAR;
 359         }
 360
 361         if (!in->object.identifier->dn || !in->object.identifier->dn[0]) {
 362                 return WERR_FOOBAR;
 363         }
 364
 365         msg = ldb_msg_new(mem_ctx);
 366         W_ERROR_HAVE_NO_MEMORY(msg);
 367
 368         msg->dn = ldb_dn_new(msg, ldb, in->object.identifier->dn);
 369         W_ERROR_HAVE_NO_MEMORY(msg->dn);
 370
 371         msg->num_elements       = in->object.attribute_ctr.num_attributes;
 372         msg->elements           = talloc_array(msg, struct ldb_message_element,
 373                                                msg->num_elements);
 374         W_ERROR_HAVE_NO_MEMORY(msg->elements);
 375
 376         for (i=0; i < msg->num_elements; i++) {
 377                 struct drsuapi_DsReplicaAttribute *a;
 378                 struct ldb_message_element *e;
 379
 380                 a = &in->object.attribute_ctr.attributes[i];
 381                 e = &msg->elements[i];
 382
 383                 status = dsdb_attribute_drsuapi_to_ldb(ldb, schema, a, msg->elements, e);
 384                 W_ERROR_NOT_OK_RETURN(status);
 385         }
 386
 387
 388         *_msg = msg;
 389
 390         return WERR_OK;
 391 }
 392
 393 WERROR dsdb_origin_objects_commit(struct ldb_context *ldb,
 394                                   TALLOC_CTX *mem_ctx,
 395                                   const struct drsuapi_DsReplicaObjectListItem *first_object,
 396                                   uint32_t *_num,
 397                                   struct drsuapi_DsReplicaObjectIdentifier2 **_ids)
 398 {
 399         WERROR status;
 400         const struct dsdb_schema *schema;
 401         const struct drsuapi_DsReplicaObjectListItem *cur;
 402         struct ldb_message **objects;
 403         struct drsuapi_DsReplicaObjectIdentifier2 *ids;
 404         uint32_t i;
 405         uint32_t num_objects = 0;
 406         const char * const attrs[] = {
 407                 "objectGUID",
 408                 "objectSid",
 409                 NULL
 410         };
 411         struct ldb_result *res;
 412         int ret;
 413
 414         schema = dsdb_get_schema(ldb);
 415         if (!schema) {
 416                 return WERR_DS_SCHEMA_NOT_LOADED;
 417         }
 418
 419         for (cur = first_object; cur; cur = cur->next_object) {
 420                 num_objects++;
 421         }
 422
 423         if (num_objects == 0) {
 424                 return WERR_OK;
 425         }
 426
 427         objects = talloc_array(mem_ctx, struct ldb_message *,
 428                                num_objects);
 429         W_ERROR_HAVE_NO_MEMORY(objects);
 430
 431         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 432                 status = dsdb_convert_object(ldb, schema,
 433                                              cur, objects, &objects[i]);
 434                 W_ERROR_NOT_OK_RETURN(status);
 435         }
 436
 437         ids = talloc_array(mem_ctx,
 438                            struct drsuapi_DsReplicaObjectIdentifier2,
 439                            num_objects);
 440         W_ERROR_HAVE_NO_MEMORY(objects);
 441
 442         for (i=0; i < num_objects; i++) {
 443                 struct dom_sid *sid = NULL;
 444                 ret = ldb_add(ldb, objects[i]);
 445                 if (ret != 0) {
 446                         goto cancel;
 447                 }
 448                 ret = ldb_search(ldb, objects, &res, objects[i]->dn,
 449                                  LDB_SCOPE_BASE, attrs,
 450                                  "(objectClass=*)");
 451                 if (ret != 0) {
 452                         goto cancel;
 453                 }
 454                 ids[i].guid = samdb_result_guid(res->msgs[0], "objectGUID");
 455                 sid = samdb_result_dom_sid(objects, res->msgs[0], "objectSid");
 456                 if (sid) {
 457                         ids[i].sid = *sid;
 458                 } else {
 459                         ZERO_STRUCT(ids[i].sid);
 460                 }
 461         }
 462
 463         talloc_free(objects);
 464
 465         *_num = num_objects;
 466         *_ids = ids;
 467         return WERR_OK;
 468 cancel:
 469         talloc_free(objects);
 470         ldb_transaction_cancel(ldb);
 471         return WERR_FOOBAR;
 472 }