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                 ret = ldb_msg_add_value(msg, rdn_attr->lDAPDisplayName, rdn_value, NULL);
 154                 if (ret != LDB_SUCCESS) {
 155                         return WERR_FOOBAR;
 156                 }
 157
 158                 rdn_m->attid                            = rdn_attid;
 159                 rdn_m->version                          = name_d->version;
 160                 rdn_m->originating_change_time          = name_d->originating_change_time;
 161                 rdn_m->originating_invocation_id        = name_d->originating_invocation_id;
 162                 rdn_m->originating_usn                  = name_d->originating_usn;
 163                 rdn_m->local_usn                        = 0;
 164                 md->ctr.ctr1.count++;
 165
 166         }
 167
 168         whenChanged_t = nt_time_to_unix(whenChanged);
 169         whenChanged_s = ldb_timestring(msg, whenChanged_t);
 170         W_ERROR_HAVE_NO_MEMORY(whenChanged_s);
 171
 172         ndr_err = ndr_push_struct_blob(&guid_value, msg,
 173                                        lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")),
 174                                        &in->object.identifier->guid,
 175                                          (ndr_push_flags_fn_t)ndr_push_GUID);
 176         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 177                 nt_status = ndr_map_error2ntstatus(ndr_err);
 178                 return ntstatus_to_werror(nt_status);
 179         }
 180
 181         out->msg                = msg;
 182         out->guid_value         = guid_value;
 183         out->when_changed       = whenChanged_s;
 184         out->meta_data          = md;
 185         return WERR_OK;
 186 }
 187
 188 WERROR dsdb_extended_replicated_objects_commit(struct ldb_context *ldb,
 189                                                const char *partition_dn,
 190                                                const struct drsuapi_DsReplicaOIDMapping_Ctr *mapping_ctr,
 191                                                uint32_t object_count,
 192                                                const struct drsuapi_DsReplicaObjectListItemEx *first_object,
 193                                                uint32_t linked_attributes_count,
 194                                                const struct drsuapi_DsReplicaLinkedAttribute *linked_attributes,
 195                                                const struct repsFromTo1 *source_dsa,
 196                                                const struct drsuapi_DsReplicaCursor2CtrEx *uptodateness_vector,
 197                                                const DATA_BLOB *gensec_skey,
 198                                                TALLOC_CTX *mem_ctx,
 199                                                struct dsdb_extended_replicated_objects **_out)
 200 {
 201         WERROR status;
 202         const struct dsdb_schema *schema;
 203         struct dsdb_extended_replicated_objects *out;
 204         struct ldb_result *ext_res;
 205         const struct drsuapi_DsReplicaObjectListItemEx *cur;
 206         uint32_t i;
 207         int ret;
 208
 209         schema = dsdb_get_schema(ldb);
 210         if (!schema) {
 211                 return WERR_DS_SCHEMA_NOT_LOADED;
 212         }
 213
 214         status = dsdb_verify_oid_mappings_drsuapi(schema, mapping_ctr);
 215         W_ERROR_NOT_OK_RETURN(status);
 216
 217         out = talloc_zero(mem_ctx, struct dsdb_extended_replicated_objects);
 218         W_ERROR_HAVE_NO_MEMORY(out);
 219         out->version            = DSDB_EXTENDED_REPLICATED_OBJECTS_VERSION;
 220
 221         out->partition_dn       = ldb_dn_new(out, ldb, partition_dn);
 222         W_ERROR_HAVE_NO_MEMORY(out->partition_dn);
 223
 224         out->source_dsa         = source_dsa;
 225         out->uptodateness_vector= uptodateness_vector;
 226
 227         out->num_objects        = object_count;
 228         out->objects            = talloc_array(out,
 229                                                struct dsdb_extended_replicated_object,
 230                                                out->num_objects);
 231         W_ERROR_HAVE_NO_MEMORY(out->objects);
 232
 233         /* pass the linked attributes down to the repl_meta_data
 234            module */
 235         out->linked_attributes_count = linked_attributes_count;
 236         out->linked_attributes       = linked_attributes;
 237
 238         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 239                 if (i == out->num_objects) {
 240                         return WERR_FOOBAR;
 241                 }
 242
 243                 status = dsdb_convert_object_ex(ldb, schema,
 244                                                 cur, gensec_skey,
 245                                                 out->objects, &out->objects[i]);
 246                 if (!W_ERROR_IS_OK(status)) {
 247                         DEBUG(0,("Failed to convert object %s\n", cur->object.identifier->dn));
 248                         return status;
 249                 }
 250         }
 251         if (i != out->num_objects) {
 252                 return WERR_FOOBAR;
 253         }
 254
 255         /* TODO: handle linked attributes */
 256
 257         /* wrap the extended operation in a transaction
 258            See [MS-DRSR] 3.3.2 Transactions
 259          */
 260         ret = ldb_transaction_start(ldb);
 261         if (ret != LDB_SUCCESS) {
 262                 DEBUG(0,(__location__ " Failed to start transaction\n"));
 263                 talloc_free(out);
 264                 return WERR_FOOBAR;
 265         }
 266
 267         ret = ldb_extended(ldb, DSDB_EXTENDED_REPLICATED_OBJECTS_OID, out, &ext_res);
 268         if (ret != LDB_SUCCESS) {
 269                 DEBUG(0,("Failed to apply records: %s: %s\n",
 270                          ldb_errstring(ldb), ldb_strerror(ret)));
 271                 talloc_free(out);
 272                 ldb_transaction_cancel(ldb);
 273                 return WERR_FOOBAR;
 274         }
 275         talloc_free(ext_res);
 276
 277         ret = ldb_transaction_commit(ldb);
 278         if (ret != LDB_SUCCESS) {
 279                 DEBUG(0,(__location__ " Failed to commit transaction\n"));
 280                 talloc_free(out);
 281                 return WERR_FOOBAR;
 282         }
 283
 284         if (_out) {
 285                 *_out = out;
 286         } else {
 287                 talloc_free(out);
 288         }
 289
 290         return WERR_OK;
 291 }
 292
 293 static WERROR dsdb_convert_object(struct ldb_context *ldb,
 294                                   const struct dsdb_schema *schema,
 295                                   const struct drsuapi_DsReplicaObjectListItem *in,
 296                                   TALLOC_CTX *mem_ctx,
 297                                   struct ldb_message **_msg)
 298 {
 299         WERROR status;
 300         uint32_t i;
 301         struct ldb_message *msg;
 302
 303         if (!in->object.identifier) {
 304                 return WERR_FOOBAR;
 305         }
 306
 307         if (!in->object.identifier->dn || !in->object.identifier->dn[0]) {
 308                 return WERR_FOOBAR;
 309         }
 310
 311         msg = ldb_msg_new(mem_ctx);
 312         W_ERROR_HAVE_NO_MEMORY(msg);
 313
 314         msg->dn = ldb_dn_new(msg, ldb, in->object.identifier->dn);
 315         W_ERROR_HAVE_NO_MEMORY(msg->dn);
 316
 317         msg->num_elements       = in->object.attribute_ctr.num_attributes;
 318         msg->elements           = talloc_array(msg, struct ldb_message_element,
 319                                                msg->num_elements);
 320         W_ERROR_HAVE_NO_MEMORY(msg->elements);
 321
 322         for (i=0; i < msg->num_elements; i++) {
 323                 struct drsuapi_DsReplicaAttribute *a;
 324                 struct ldb_message_element *e;
 325
 326                 a = &in->object.attribute_ctr.attributes[i];
 327                 e = &msg->elements[i];
 328
 329                 status = dsdb_attribute_drsuapi_to_ldb(ldb, schema, a, msg->elements, e);
 330                 W_ERROR_NOT_OK_RETURN(status);
 331         }
 332
 333
 334         *_msg = msg;
 335
 336         return WERR_OK;
 337 }
 338
 339 WERROR dsdb_origin_objects_commit(struct ldb_context *ldb,
 340                                   TALLOC_CTX *mem_ctx,
 341                                   const struct drsuapi_DsReplicaObjectListItem *first_object,
 342                                   uint32_t *_num,
 343                                   struct drsuapi_DsReplicaObjectIdentifier2 **_ids)
 344 {
 345         WERROR status;
 346         const struct dsdb_schema *schema;
 347         const struct drsuapi_DsReplicaObjectListItem *cur;
 348         struct ldb_message **objects;
 349         struct drsuapi_DsReplicaObjectIdentifier2 *ids;
 350         uint32_t i;
 351         uint32_t num_objects = 0;
 352         const char * const attrs[] = {
 353                 "objectGUID",
 354                 "objectSid",
 355                 NULL
 356         };
 357         struct ldb_result *res;
 358         int ret;
 359
 360         schema = dsdb_get_schema(ldb);
 361         if (!schema) {
 362                 return WERR_DS_SCHEMA_NOT_LOADED;
 363         }
 364
 365         for (cur = first_object; cur; cur = cur->next_object) {
 366                 num_objects++;
 367         }
 368
 369         if (num_objects == 0) {
 370                 return WERR_OK;
 371         }
 372
 373         objects = talloc_array(mem_ctx, struct ldb_message *,
 374                                num_objects);
 375         W_ERROR_HAVE_NO_MEMORY(objects);
 376
 377         for (i=0, cur = first_object; cur; cur = cur->next_object, i++) {
 378                 status = dsdb_convert_object(ldb, schema,
 379                                              cur, objects, &objects[i]);
 380                 W_ERROR_NOT_OK_RETURN(status);
 381         }
 382
 383         ids = talloc_array(mem_ctx,
 384                            struct drsuapi_DsReplicaObjectIdentifier2,
 385                            num_objects);
 386         W_ERROR_HAVE_NO_MEMORY(objects);
 387
 388         for (i=0; i < num_objects; i++) {
 389                 struct dom_sid *sid = NULL;
 390                 ret = ldb_add(ldb, objects[i]);
 391                 if (ret != 0) {
 392                         goto cancel;
 393                 }
 394                 ret = ldb_search(ldb, objects, &res, objects[i]->dn,
 395                                  LDB_SCOPE_BASE, attrs,
 396                                  "(objectClass=*)");
 397                 if (ret != 0) {
 398                         goto cancel;
 399                 }
 400                 ids[i].guid = samdb_result_guid(res->msgs[0], "objectGUID");
 401                 sid = samdb_result_dom_sid(objects, res->msgs[0], "objectSid");
 402                 if (sid) {
 403                         ids[i].sid = *sid;
 404                 } else {
 405                         ZERO_STRUCT(ids[i].sid);
 406                 }
 407         }
 408
 409         talloc_free(objects);
 410
 411         *_num = num_objects;
 412         *_ids = ids;
 413         return WERR_OK;
 414 cancel:
 415         talloc_free(objects);
 416         ldb_transaction_cancel(ldb);
 417         return WERR_FOOBAR;
 418 }