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 = ldb_get_schema_basedn(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         data->schema_dn = schema_dn;
 123
 124         /* Used to check to see if this is a result on the CN=Aggregate schema */
 125         data->aggregate_dn = samdb_aggregate_schema_dn(ldb, data);
 126         if (!data->aggregate_dn) {
 127                 ldb_set_errstring(ldb, "Could not build aggregate schema DN");
 128                 return LDB_ERR_OPERATIONS_ERROR;
 129         }
 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         WERROR status;
 144
 145         ldb = ldb_module_get_ctx(module);
 146
 147         /* special objects should always go through */
 148         if (ldb_dn_is_special(req->op.add.message->dn)) {
 149                 return ldb_next_request(module, req);
 150         }
 151
 152         /* replicated update should always go through */
 153         if (ldb_request_get_control(req, DSDB_CONTROL_REPLICATED_UPDATE_OID)) {
 154                 return ldb_next_request(module, req);
 155         }
 156
 157         schema = dsdb_get_schema(ldb, req);
 158         if (!schema) {
 159                 return ldb_next_request(module, req);
 160         }
 161
 162         if (!schema->fsmo.we_are_master) {
 163                 ldb_debug_set(ldb, LDB_DEBUG_ERROR,
 164                           "schema_data_add: we are not master: reject request\n");
 165                 return LDB_ERR_UNWILLING_TO_PERFORM;
 166         }
 167
 168         attributeID = ldb_msg_find_ldb_val(req->op.add.message, "attributeID");
 169         governsID = ldb_msg_find_ldb_val(req->op.add.message, "governsID");
 170
 171         if (attributeID) {
 172                 oid_attr = "attributeID";
 173                 oid = talloc_strndup(req, (const char *)attributeID->data, attributeID->length);
 174         } else if (governsID) {
 175                 oid_attr = "governsID";
 176                 oid = talloc_strndup(req, (const char *)governsID->data, governsID->length);
 177         } else {
 178                 return ldb_next_request(module, req);
 179         }
 180
 181         if (!oid) {
 182                 ldb_oom(ldb);
 183                 return LDB_ERR_OPERATIONS_ERROR;
 184         }
 185
 186         status = dsdb_schema_pfm_find_oid(schema->prefixmap, oid, NULL);
 187         if (!W_ERROR_IS_OK(status)) {
 188                 /* check for internal errors */
 189                 if (!W_ERROR_EQUAL(WERR_DS_NO_MSDS_INTID, status)) {
 190                         ldb_debug_set(ldb, LDB_DEBUG_ERROR,
 191                                       "schema_data_add: failed to map %s[%s]: %s\n",
 192                                       oid_attr, oid, win_errstr(status));
 193                         return LDB_ERR_UNWILLING_TO_PERFORM;
 194                 }
 195
 196                 /* Update prefixMap and save it */
 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
 206         return ldb_next_request(module, req);
 207 }
 208
 209 static int generate_objectClasses(struct ldb_context *ldb, struct ldb_message *msg,
 210                                   const struct dsdb_schema *schema)
 211 {
 212         const struct dsdb_class *sclass;
 213         int ret;
 214
 215         for (sclass = schema->classes; sclass; sclass = sclass->next) {
 216                 ret = ldb_msg_add_string(msg, "objectClasses", schema_class_to_description(msg, sclass));
 217                 if (ret != LDB_SUCCESS) {
 218                         return ret;
 219                 }
 220         }
 221         return LDB_SUCCESS;
 222 }
 223 static int generate_attributeTypes(struct ldb_context *ldb, struct ldb_message *msg,
 224                                   const struct dsdb_schema *schema)
 225 {
 226         const struct dsdb_attribute *attribute;
 227         int ret;
 228
 229         for (attribute = schema->attributes; attribute; attribute = attribute->next) {
 230                 ret = ldb_msg_add_string(msg, "attributeTypes", schema_attribute_to_description(msg, attribute));
 231                 if (ret != LDB_SUCCESS) {
 232                         return ret;
 233                 }
 234         }
 235         return LDB_SUCCESS;
 236 }
 237
 238 static int generate_dITContentRules(struct ldb_context *ldb, struct ldb_message *msg,
 239                                     const struct dsdb_schema *schema)
 240 {
 241         const struct dsdb_class *sclass;
 242         int ret;
 243
 244         for (sclass = schema->classes; sclass; sclass = sclass->next) {
 245                 if (sclass->auxiliaryClass || sclass->systemAuxiliaryClass) {
 246                         char *ditcontentrule = schema_class_to_dITContentRule(msg, sclass, schema);
 247                         if (!ditcontentrule) {
 248                                 ldb_oom(ldb);
 249                                 return LDB_ERR_OPERATIONS_ERROR;
 250                         }
 251                         ret = ldb_msg_add_steal_string(msg, "dITContentRules", ditcontentrule);
 252                         if (ret != LDB_SUCCESS) {
 253                                 return ret;
 254                         }
 255                 }
 256         }
 257         return LDB_SUCCESS;
 258 }
 259
 260 static int generate_extendedAttributeInfo(struct ldb_context *ldb,
 261                                           struct ldb_message *msg,
 262                                           const struct dsdb_schema *schema)
 263 {
 264         const struct dsdb_attribute *attribute;
 265         int ret;
 266
 267         for (attribute = schema->attributes; attribute; attribute = attribute->next) {
 268                 char *val = schema_attribute_to_extendedInfo(msg, attribute);
 269                 if (!val) {
 270                         ldb_oom(ldb);
 271                         return LDB_ERR_OPERATIONS_ERROR;
 272                 }
 273
 274                 ret = ldb_msg_add_string(msg, "extendedAttributeInfo", val);
 275                 if (ret != LDB_SUCCESS) {
 276                         return ret;
 277                 }
 278         }
 279
 280         return LDB_SUCCESS;
 281 }
 282
 283 static int generate_extendedClassInfo(struct ldb_context *ldb,
 284                                       struct ldb_message *msg,
 285                                       const struct dsdb_schema *schema)
 286 {
 287         const struct dsdb_class *sclass;
 288         int ret;
 289
 290         for (sclass = schema->classes; sclass; sclass = sclass->next) {
 291                 char *val = schema_class_to_extendedInfo(msg, sclass);
 292                 if (!val) {
 293                         ldb_oom(ldb);
 294                         return LDB_ERR_OPERATIONS_ERROR;
 295                 }
 296
 297                 ret = ldb_msg_add_string(msg, "extendedClassInfo", val);
 298                 if (ret != LDB_SUCCESS) {
 299                         return ret;
 300                 }
 301         }
 302
 303         return LDB_SUCCESS;
 304 }
 305
 306
 307 static int generate_possibleInferiors(struct ldb_context *ldb, struct ldb_message *msg,
 308                                       const struct dsdb_schema *schema)
 309 {
 310         struct ldb_dn *dn = msg->dn;
 311         unsigned int i;
 312         int ret;
 313         const char *first_component_name = ldb_dn_get_component_name(dn, 0);
 314         const struct ldb_val *first_component_val;
 315         const struct dsdb_class *schema_class;
 316         const char **possibleInferiors;
 317
 318         if (strcasecmp(first_component_name, "cn") != 0) {
 319                 return LDB_SUCCESS;
 320         }
 321
 322         first_component_val = ldb_dn_get_component_val(dn, 0);
 323
 324         schema_class = dsdb_class_by_cn_ldb_val(schema, first_component_val);
 325         if (schema_class == NULL) {
 326                 return LDB_SUCCESS;
 327         }
 328
 329         possibleInferiors = schema_class->possibleInferiors;
 330         if (possibleInferiors == NULL) {
 331                 return LDB_SUCCESS;
 332         }
 333
 334         for (i=0;possibleInferiors[i];i++) {
 335                 ret = ldb_msg_add_string(msg, "possibleInferiors", possibleInferiors[i]);
 336                 if (ret != LDB_SUCCESS) {
 337                         return ret;
 338                 }
 339         }
 340
 341         return LDB_SUCCESS;
 342 }
 343
 344
 345 /* Add objectClasses, attributeTypes and dITContentRules from the
 346    schema object (they are not stored in the database)
 347  */
 348 static int schema_data_search_callback(struct ldb_request *req, struct ldb_reply *ares)
 349 {
 350         struct ldb_context *ldb;
 351         struct schema_data_search_data *ac;
 352         struct schema_data_private_data *mc;
 353         unsigned int i;
 354         int ret;
 355
 356         ac = talloc_get_type(req->context, struct schema_data_search_data);
 357         mc = talloc_get_type(ldb_module_get_private(ac->module), struct schema_data_private_data);
 358         ldb = ldb_module_get_ctx(ac->module);
 359
 360         if (!ares) {
 361                 return ldb_module_done(ac->req, NULL, NULL,
 362                                         LDB_ERR_OPERATIONS_ERROR);
 363         }
 364         if (ares->error != LDB_SUCCESS) {
 365                 return ldb_module_done(ac->req, ares->controls,
 366                                         ares->response, ares->error);
 367         }
 368         /* Only entries are interesting, and we handle the case of the parent seperatly */
 369
 370         switch (ares->type) {
 371         case LDB_REPLY_ENTRY:
 372
 373                 if (ldb_dn_compare(ares->message->dn, mc->aggregate_dn) == 0) {
 374                         for (i=0; i < ARRAY_SIZE(generated_attrs); i++) {
 375                                 if (generated_attrs[i].aggregate &&
 376                                     ldb_attr_in_list(ac->req->op.search.attrs, generated_attrs[i].attr)) {
 377                                         ret = generated_attrs[i].fn(ldb, ares->message, ac->schema);
 378                                         if (ret != LDB_SUCCESS) {
 379                                                 return ret;
 380                                         }
 381                                 }
 382                         }
 383                 } else if ((ldb_dn_compare_base(mc->schema_dn, ares->message->dn) == 0)
 384                            && (ldb_dn_compare(mc->schema_dn, ares->message->dn) != 0)) {
 385                         for (i=0; i < ARRAY_SIZE(generated_attrs); i++) {
 386                                 if (!generated_attrs[i].aggregate &&
 387                                     ldb_attr_in_list(ac->req->op.search.attrs, generated_attrs[i].attr)) {
 388                                         ret = generated_attrs[i].fn(ldb, ares->message, ac->schema);
 389                                         if (ret != LDB_SUCCESS) {
 390                                                 return ret;
 391                                         }
 392                                 }
 393                         }
 394                 }
 395
 396
 397                 return ldb_module_send_entry(ac->req, ares->message, ares->controls);
 398
 399         case LDB_REPLY_REFERRAL:
 400
 401                 return ldb_module_send_referral(ac->req, ares->referral);
 402
 403         case LDB_REPLY_DONE:
 404
 405                 return ldb_module_done(ac->req, ares->controls,
 406                                         ares->response, ares->error);
 407         }
 408
 409         return LDB_SUCCESS;
 410 }
 411
 412 /* search */
 413 static int schema_data_search(struct ldb_module *module, struct ldb_request *req)
 414 {
 415         struct ldb_context *ldb = ldb_module_get_ctx(module);
 416         unsigned int i;
 417         int ret;
 418         struct schema_data_search_data *search_context;
 419         struct ldb_request *down_req;
 420         struct dsdb_schema *schema = dsdb_get_schema(ldb, NULL);
 421
 422         if (!schema || !ldb_module_get_private(module)) {
 423                 /* If there is no schema, there is little we can do */
 424                 return ldb_next_request(module, req);
 425         }
 426         for (i=0; i < ARRAY_SIZE(generated_attrs); i++) {
 427                 if (ldb_attr_in_list(req->op.search.attrs, generated_attrs[i].attr)) {
 428                         break;
 429                 }
 430         }
 431         if (i == ARRAY_SIZE(generated_attrs)) {
 432                 /* No request for a generated attr found, nothing to
 433                  * see here, move along... */
 434                 return ldb_next_request(module, req);
 435         }
 436
 437         search_context = talloc(req, struct schema_data_search_data);
 438         if (!search_context) {
 439                 ldb_oom(ldb);
 440                 return LDB_ERR_OPERATIONS_ERROR;
 441         }
 442
 443         search_context->module = module;
 444         search_context->req = req;
 445         search_context->schema = talloc_reference(search_context, schema);
 446         if (!search_context->schema) {
 447                 ldb_oom(ldb);
 448                 return LDB_ERR_OPERATIONS_ERROR;
 449         }
 450
 451         ret = ldb_build_search_req_ex(&down_req, ldb, search_context,
 452                                         req->op.search.base,
 453                                         req->op.search.scope,
 454                                         req->op.search.tree,
 455                                         req->op.search.attrs,
 456                                         req->controls,
 457                                         search_context, schema_data_search_callback,
 458                                         req);
 459         if (ret != LDB_SUCCESS) {
 460                 return LDB_ERR_OPERATIONS_ERROR;
 461         }
 462
 463         return ldb_next_request(module, down_req);
 464 }
 465
 466
 467 _PUBLIC_ const struct ldb_module_ops ldb_schema_data_module_ops = {
 468         .name           = "schema_data",
 469         .init_context   = schema_data_init,
 470         .add            = schema_data_add,
 471         .search         = schema_data_search
 472 };