source4/dsdb/samdb/ldb_modules/schema_data.c

   1 /*
   2    Unix SMB/CIFS mplementation.
   3
   4    The module that handles the Schema checkings and dynamic attributes
   5
   6    Copyright (C) Stefan Metzmacher <metze@samba.org> 2007
   7    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2009
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  21
  22 */
  23
  24 #include "includes.h"
  25 #include "ldb_module.h"
  26 #include "dsdb/samdb/samdb.h"
  27 #include "librpc/gen_ndr/ndr_misc.h"
  28 #include "librpc/gen_ndr/ndr_drsuapi.h"
  29 #include "librpc/gen_ndr/ndr_drsblobs.h"
  30 #include "param/param.h"
  31 #include "dsdb/samdb/ldb_modules/util.h"
  32
  33 static int generate_objectClasses(struct ldb_context *ldb, struct ldb_message *msg,
  34                                   const struct dsdb_schema *schema);
  35 static int generate_attributeTypes(struct ldb_context *ldb, struct ldb_message *msg,
  36                                    const struct dsdb_schema *schema);
  37 static int generate_dITContentRules(struct ldb_context *ldb, struct ldb_message *msg,
  38                                     const struct dsdb_schema *schema);
  39 static int generate_extendedAttributeInfo(struct ldb_context *ldb, struct ldb_message *msg,
  40                                           const struct dsdb_schema *schema);
  41 static int generate_extendedClassInfo(struct ldb_context *ldb, struct ldb_message *msg,
  42                                       const struct dsdb_schema *schema);
  43 static int generate_possibleInferiors(struct ldb_context *ldb, struct ldb_message *msg,
  44                                       const struct dsdb_schema *schema);
  45
  46 static const struct {
  47         const char *attr;
  48         int (*fn)(struct ldb_context *, struct ldb_message *, const struct dsdb_schema *);
  49         bool aggregate;
  50 } generated_attrs[] = {
  51         {
  52                 .attr = "objectClasses",
  53                 .fn = generate_objectClasses,
  54                 .aggregate = true,
  55         },
  56         {
  57                 .attr = "attributeTypes",
  58                 .fn = generate_attributeTypes,
  59                 .aggregate = true,
  60         },
  61         {
  62                 .attr = "dITContentRules",
  63                 .fn = generate_dITContentRules,
  64                 .aggregate = true,
  65         },
  66         {
  67                 .attr = "extendedAttributeInfo",
  68                 .fn = generate_extendedAttributeInfo,
  69                 .aggregate = true,
  70         },
  71         {
  72                 .attr = "extendedClassInfo",
  73                 .fn = generate_extendedClassInfo,
  74                 .aggregate = true,
  75         },
  76         {
  77                 .attr = "possibleInferiors",
  78                 .fn = generate_possibleInferiors,
  79                 .aggregate = false,
  80         }
  81 };
  82
  83 struct schema_data_private_data {
  84         struct ldb_dn *aggregate_dn;
  85         struct ldb_dn *schema_dn;
  86 };
  87
  88 struct schema_data_search_data {
  89         struct ldb_module *module;
  90         struct ldb_request *req;
  91
  92         const struct dsdb_schema *schema;
  93 };
  94
  95 static int schema_data_init(struct ldb_module *module)
  96 {
  97         struct ldb_context *ldb;
  98         struct ldb_dn *schema_dn;
  99         int ret;
 100         struct schema_data_private_data *data;
 101
 102         ret = ldb_next_init(module);
 103         if (ret != LDB_SUCCESS) {
 104                 return ret;
 105         }
 106
 107         ldb = ldb_module_get_ctx(module);
 108         schema_dn = samdb_schema_dn(ldb);
 109         if (!schema_dn) {
 110                 ldb_reset_err_string(ldb);
 111                 ldb_debug(ldb, LDB_DEBUG_WARNING,
 112                           "schema_data_init: no schema dn present: (skip schema loading)\n");
 113                 return LDB_SUCCESS;
 114         }
 115
 116         data = talloc(module, struct schema_data_private_data);
 117         if (data == NULL) {
 118                 ldb_oom(ldb);
 119                 return LDB_ERR_OPERATIONS_ERROR;
 120         }
 121
 122         /* Check to see if this is a result on the CN=Aggregate schema */
 123         data->aggregate_dn = ldb_dn_copy(data, schema_dn);
 124         if (!ldb_dn_add_child_fmt(data->aggregate_dn, "CN=Aggregate")) {
 125                 ldb_oom(ldb);
 126                 return LDB_ERR_OPERATIONS_ERROR;
 127         }
 128
 129         data->schema_dn = schema_dn;
 130
 131         ldb_module_set_private(module, data);
 132         return LDB_SUCCESS;
 133 }
 134
 135 static int schema_data_add(struct ldb_module *module, struct ldb_request *req)
 136 {
 137         struct ldb_context *ldb;
 138         struct dsdb_schema *schema;
 139         const struct ldb_val *attributeID = NULL;
 140         const struct ldb_val *governsID = NULL;
 141         const char *oid_attr = NULL;
 142         const char *oid = NULL;
 143         uint32_t attid;
 144         WERROR status;
 145
 146         ldb = ldb_module_get_ctx(module);
 147
 148         /* special objects should always go through */
 149         if (ldb_dn_is_special(req->op.add.message->dn)) {
 150                 return ldb_next_request(module, req);
 151         }
 152
 153         /* replicated update should always go through */
 154         if (ldb_request_get_control(req, DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
 155                 return ldb_next_request(module, req);
 156         }
 157
 158         schema = dsdb_get_schema(ldb);
 159         if (!schema) {
 160                 return ldb_next_request(module, req);
 161         }
 162
 163         if (!schema->fsmo.we_are_master) {
 164                 ldb_debug_set(ldb, LDB_DEBUG_ERROR,
 165                           "schema_data_add: we are not master: reject request\n");
 166                 return LDB_ERR_UNWILLING_TO_PERFORM;
 167         }
 168
 169         attributeID = ldb_msg_find_ldb_val(req->op.add.message, "attributeID");
 170         governsID = ldb_msg_find_ldb_val(req->op.add.message, "governsID");
 171
 172         if (attributeID) {
 173                 oid_attr = "attributeID";
 174                 oid = talloc_strndup(req, (const char *)attributeID->data, attributeID->length);
 175         } else if (governsID) {
 176                 oid_attr = "governsID";
 177                 oid = talloc_strndup(req, (const char *)governsID->data, governsID->length);
 178         } else {
 179                 return ldb_next_request(module, req);
 180         }
 181
 182         if (!oid) {
 183                 ldb_oom(ldb);
 184                 return LDB_ERR_OPERATIONS_ERROR;
 185         }
 186
 187         status = dsdb_schema_pfm_make_attid(schema->prefixmap, oid, &attid);
 188         if (W_ERROR_IS_OK(status)) {
 189                 return ldb_next_request(module, req);
 190         } else if (!W_ERROR_EQUAL(WERR_DS_NO_MSDS_INTID, status)) {
 191                 ldb_debug_set(ldb, LDB_DEBUG_ERROR,
 192                           "schema_data_add: failed to map %s[%s]: %s\n",
 193                           oid_attr, oid, win_errstr(status));
 194                 return LDB_ERR_UNWILLING_TO_PERFORM;
 195         }
 196
 197         status = dsdb_create_prefix_mapping(ldb, schema, oid);
 198         if (!W_ERROR_IS_OK(status)) {
 199                 ldb_debug_set(ldb, LDB_DEBUG_ERROR,
 200                           "schema_data_add: failed to create prefix mapping for %s[%s]: %s\n",
 201                           oid_attr, oid, win_errstr(status));
 202                 return LDB_ERR_UNWILLING_TO_PERFORM;
 203         }
 204
 205         return ldb_next_request(module, req);
 206 }
 207
 208 static int generate_objectClasses(struct ldb_context *ldb, struct ldb_message *msg,
 209                                   const struct dsdb_schema *schema)
 210 {
 211         const struct dsdb_class *sclass;
 212         int ret;
 213
 214         for (sclass = schema->classes; sclass; sclass = sclass->next) {
 215                 ret = ldb_msg_add_string(msg, "objectClasses", schema_class_to_description(msg, sclass));
 216                 if (ret != LDB_SUCCESS) {
 217                         return ret;
 218                 }
 219         }
 220         return LDB_SUCCESS;
 221 }
 222 static int generate_attributeTypes(struct ldb_context *ldb, struct ldb_message *msg,
 223                                   const struct dsdb_schema *schema)
 224 {
 225         const struct dsdb_attribute *attribute;
 226         int ret;
 227
 228         for (attribute = schema->attributes; attribute; attribute = attribute->next) {
 229                 ret = ldb_msg_add_string(msg, "attributeTypes", schema_attribute_to_description(msg, attribute));
 230                 if (ret != LDB_SUCCESS) {
 231                         return ret;
 232                 }
 233         }
 234         return LDB_SUCCESS;
 235 }
 236
 237 static int generate_dITContentRules(struct ldb_context *ldb, struct ldb_message *msg,
 238                                     const struct dsdb_schema *schema)
 239 {
 240         const struct dsdb_class *sclass;
 241         int ret;
 242
 243         for (sclass = schema->classes; sclass; sclass = sclass->next) {
 244                 if (sclass->auxiliaryClass || sclass->systemAuxiliaryClass) {
 245                         char *ditcontentrule = schema_class_to_dITContentRule(msg, sclass, schema);
 246                         if (!ditcontentrule) {
 247                                 ldb_oom(ldb);
 248                                 return LDB_ERR_OPERATIONS_ERROR;
 249                         }
 250                         ret = ldb_msg_add_steal_string(msg, "dITContentRules", ditcontentrule);
 251                         if (ret != LDB_SUCCESS) {
 252                                 return ret;
 253                         }
 254                 }
 255         }
 256         return LDB_SUCCESS;
 257 }
 258
 259 static int generate_extendedAttributeInfo(struct ldb_context *ldb,
 260                                           struct ldb_message *msg,
 261                                           const struct dsdb_schema *schema)
 262 {
 263         const struct dsdb_attribute *attribute;
 264         int ret;
 265
 266         for (attribute = schema->attributes; attribute; attribute = attribute->next) {
 267                 char *val = schema_attribute_to_extendedInfo(msg, attribute);
 268                 if (!val) {
 269                         ldb_oom(ldb);
 270                         return LDB_ERR_OPERATIONS_ERROR;
 271                 }
 272
 273                 ret = ldb_msg_add_string(msg, "extendedAttributeInfo", val);
 274                 if (ret != LDB_SUCCESS) {
 275                         return ret;
 276                 }
 277         }
 278
 279         return LDB_SUCCESS;
 280 }
 281
 282 static int generate_extendedClassInfo(struct ldb_context *ldb,
 283                                       struct ldb_message *msg,
 284                                       const struct dsdb_schema *schema)
 285 {
 286         const struct dsdb_class *sclass;
 287         int ret;
 288
 289         for (sclass = schema->classes; sclass; sclass = sclass->next) {
 290                 char *val = schema_class_to_extendedInfo(msg, sclass);
 291                 if (!val) {
 292                         ldb_oom(ldb);
 293                         return LDB_ERR_OPERATIONS_ERROR;
 294                 }
 295
 296                 ret = ldb_msg_add_string(msg, "extendedClassInfo", val);
 297                 if (ret != LDB_SUCCESS) {
 298                         return ret;
 299                 }
 300         }
 301
 302         return LDB_SUCCESS;
 303 }
 304
 305
 306 static int generate_possibleInferiors(struct ldb_context *ldb, struct ldb_message *msg,
 307                                       const struct dsdb_schema *schema)
 308 {
 309         struct ldb_dn *dn = msg->dn;
 310         int ret, i;
 311         const char *first_component_name = ldb_dn_get_component_name(dn, 0);
 312         const struct ldb_val *first_component_val;
 313         const struct dsdb_class *schema_class;
 314         const char **possibleInferiors;
 315
 316         if (strcasecmp(first_component_name, "cn") != 0) {
 317                 return LDB_SUCCESS;
 318         }
 319
 320         first_component_val = ldb_dn_get_component_val(dn, 0);
 321
 322         schema_class = dsdb_class_by_cn_ldb_val(schema, first_component_val);
 323         if (schema_class == NULL) {
 324                 return LDB_SUCCESS;
 325         }
 326
 327         possibleInferiors = schema_class->possibleInferiors;
 328         if (possibleInferiors == NULL) {
 329                 return LDB_SUCCESS;
 330         }
 331
 332         for (i=0;possibleInferiors[i];i++) {
 333                 ret = ldb_msg_add_string(msg, "possibleInferiors", possibleInferiors[i]);
 334                 if (ret != LDB_SUCCESS) {
 335                         return ret;
 336                 }
 337         }
 338
 339         return LDB_SUCCESS;
 340 }
 341
 342
 343 /* Add objectClasses, attributeTypes and dITContentRules from the
 344    schema object (they are not stored in the database)
 345  */
 346 static int schema_data_search_callback(struct ldb_request *req, struct ldb_reply *ares)
 347 {
 348         struct ldb_context *ldb;
 349         struct schema_data_search_data *ac;
 350         struct schema_data_private_data *mc;
 351         int i, ret;
 352
 353         ac = talloc_get_type(req->context, struct schema_data_search_data);
 354         mc = talloc_get_type(ldb_module_get_private(ac->module), struct schema_data_private_data);
 355         ldb = ldb_module_get_ctx(ac->module);
 356
 357         if (!ares) {
 358                 return ldb_module_done(ac->req, NULL, NULL,
 359                                         LDB_ERR_OPERATIONS_ERROR);
 360         }
 361         if (ares->error != LDB_SUCCESS) {
 362                 return ldb_module_done(ac->req, ares->controls,
 363                                         ares->response, ares->error);
 364         }
 365         /* Only entries are interesting, and we handle the case of the parent seperatly */
 366
 367         switch (ares->type) {
 368         case LDB_REPLY_ENTRY:
 369
 370                 if (ldb_dn_compare(ares->message->dn, mc->aggregate_dn) == 0) {
 371                         for (i=0; i < ARRAY_SIZE(generated_attrs); i++) {
 372                                 if (generated_attrs[i].aggregate &&
 373                                     ldb_attr_in_list(ac->req->op.search.attrs, generated_attrs[i].attr)) {
 374                                         ret = generated_attrs[i].fn(ldb, ares->message, ac->schema);
 375                                         if (ret != LDB_SUCCESS) {
 376                                                 return ret;
 377                                         }
 378                                 }
 379                         }
 380                 } else if ((ldb_dn_compare_base(mc->schema_dn, ares->message->dn) == 0)
 381                            && (ldb_dn_compare(mc->schema_dn, ares->message->dn) != 0)) {
 382                         for (i=0; i < ARRAY_SIZE(generated_attrs); i++) {
 383                                 if (!generated_attrs[i].aggregate &&
 384                                     ldb_attr_in_list(ac->req->op.search.attrs, generated_attrs[i].attr)) {
 385                                         ret = generated_attrs[i].fn(ldb, ares->message, ac->schema);
 386                                         if (ret != LDB_SUCCESS) {
 387                                                 return ret;
 388                                         }
 389                                 }
 390                         }
 391                 }
 392
 393
 394                 return ldb_module_send_entry(ac->req, ares->message, ares->controls);
 395
 396         case LDB_REPLY_REFERRAL:
 397
 398                 return ldb_module_send_referral(ac->req, ares->referral);
 399
 400         case LDB_REPLY_DONE:
 401
 402                 return ldb_module_done(ac->req, ares->controls,
 403                                         ares->response, ares->error);
 404         }
 405
 406         return LDB_SUCCESS;
 407 }
 408
 409 /* search */
 410 static int schema_data_search(struct ldb_module *module, struct ldb_request *req)
 411 {
 412         struct ldb_context *ldb = ldb_module_get_ctx(module);
 413         int i, ret;
 414         struct schema_data_search_data *search_context;
 415         struct ldb_request *down_req;
 416         struct dsdb_schema *schema = dsdb_get_schema(ldb);
 417
 418         if (!schema || !ldb_module_get_private(module)) {
 419                 /* If there is no schema, there is little we can do */
 420                 return ldb_next_request(module, req);
 421         }
 422         for (i=0; i < ARRAY_SIZE(generated_attrs); i++) {
 423                 if (ldb_attr_in_list(req->op.search.attrs, generated_attrs[i].attr)) {
 424                         break;
 425                 }
 426         }
 427         if (i == ARRAY_SIZE(generated_attrs)) {
 428                 /* No request for a generated attr found, nothing to
 429                  * see here, move along... */
 430                 return ldb_next_request(module, req);
 431         }
 432
 433         search_context = talloc(req, struct schema_data_search_data);
 434         if (!search_context) {
 435                 ldb_oom(ldb);
 436                 return LDB_ERR_OPERATIONS_ERROR;
 437         }
 438
 439         search_context->module = module;
 440         search_context->req = req;
 441         search_context->schema = schema;
 442
 443         ret = ldb_build_search_req_ex(&down_req, ldb, search_context,
 444                                         req->op.search.base,
 445                                         req->op.search.scope,
 446                                         req->op.search.tree,
 447                                         req->op.search.attrs,
 448                                         req->controls,
 449                                         search_context, schema_data_search_callback,
 450                                         req);
 451         if (ret != LDB_SUCCESS) {
 452                 return LDB_ERR_OPERATIONS_ERROR;
 453         }
 454
 455         return ldb_next_request(module, down_req);
 456 }
 457
 458
 459 _PUBLIC_ const struct ldb_module_ops ldb_schema_data_module_ops = {
 460         .name           = "schema_data",
 461         .init_context   = schema_data_init,
 462         .add            = schema_data_add,
 463         .search         = schema_data_search
 464 };