source4/dsdb/schema/schema_set.c

   1 /*
   2    Unix SMB/CIFS mplementation.
   3    DSDB schema header
   4
   5    Copyright (C) Stefan Metzmacher <metze@samba.org> 2006-2007
   6    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2006-2008
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20
  21 */
  22
  23 #include "includes.h"
  24 #include "dsdb/samdb/samdb.h"
  25 #include "lib/ldb/include/ldb_errors.h"
  26 #include "lib/ldb/include/ldb_private.h"
  27 #include "lib/util/dlinklist.h"
  28 #include "param/param.h"
  29
  30
  31 static int dsdb_schema_set_attributes(struct ldb_context *ldb, struct dsdb_schema *schema, bool write_attributes)
  32 {
  33         int ret = LDB_SUCCESS;
  34         struct ldb_result *res;
  35         struct ldb_result *res_idx;
  36         struct dsdb_attribute *attr;
  37         struct ldb_message *mod_msg;
  38         TALLOC_CTX *mem_ctx = talloc_new(ldb);
  39
  40         struct ldb_message *msg;
  41         struct ldb_message *msg_idx;
  42
  43         if (!mem_ctx) {
  44                 return LDB_ERR_OPERATIONS_ERROR;
  45         }
  46
  47         msg = ldb_msg_new(mem_ctx);
  48         if (!msg) {
  49                 ldb_oom(ldb);
  50                 return LDB_ERR_OPERATIONS_ERROR;
  51         }
  52         msg_idx = ldb_msg_new(mem_ctx);
  53         if (!msg_idx) {
  54                 ldb_oom(ldb);
  55                 return LDB_ERR_OPERATIONS_ERROR;
  56         }
  57         msg->dn = ldb_dn_new(msg, ldb, "@ATTRIBUTES");
  58         if (!msg->dn) {
  59                 ldb_oom(ldb);
  60                 return LDB_ERR_OPERATIONS_ERROR;
  61         }
  62         msg_idx->dn = ldb_dn_new(msg, ldb, "@INDEXLIST");
  63         if (!msg_idx->dn) {
  64                 ldb_oom(ldb);
  65                 return LDB_ERR_OPERATIONS_ERROR;
  66         }
  67
  68         for (attr = schema->attributes; attr; attr = attr->next) {
  69                 const struct ldb_schema_syntax *s;
  70                 const char *syntax = attr->syntax->ldb_syntax;
  71                 if (!syntax) {
  72                         syntax = attr->syntax->ldap_oid;
  73                 }
  74
  75                 /* Write out a rough approximation of the schema as an @ATTRIBUTES value, for bootstrapping */
  76                 if (strcmp(syntax, LDB_SYNTAX_INTEGER) == 0) {
  77                         ret = ldb_msg_add_string(msg, attr->lDAPDisplayName, "INTEGER");
  78                 } else if (strcmp(syntax, LDB_SYNTAX_DIRECTORY_STRING) == 0) {
  79                         ret = ldb_msg_add_string(msg, attr->lDAPDisplayName, "CASE_INSENSITIVE");
  80                 }
  81                 if (ret != LDB_SUCCESS) {
  82                         break;
  83                 }
  84
  85                 if (attr->searchFlags & SEARCH_FLAG_ATTINDEX) {
  86                         ret = ldb_msg_add_string(msg_idx, "@IDXATTR", attr->lDAPDisplayName);
  87                         if (ret != LDB_SUCCESS) {
  88                                 break;
  89                         }
  90                 }
  91
  92                 if (!attr->syntax) {
  93                         continue;
  94                 }
  95
  96                 ret = ldb_schema_attribute_add(ldb, attr->lDAPDisplayName, LDB_ATTR_FLAG_FIXED,
  97                                                syntax);
  98                 if (ret != LDB_SUCCESS) {
  99                         s = ldb_samba_syntax_by_name(ldb, attr->syntax->ldap_oid);
 100                         if (s) {
 101                                 ret = ldb_schema_attribute_add_with_syntax(ldb, attr->lDAPDisplayName, LDB_ATTR_FLAG_FIXED, s);
 102                         } else {
 103                                 ret = LDB_SUCCESS; /* Nothing to do here */
 104                         }
 105                 }
 106
 107                 if (ret != LDB_SUCCESS) {
 108                         break;
 109                 }
 110         }
 111
 112         if (!write_attributes || ret != LDB_SUCCESS) {
 113                 talloc_free(mem_ctx);
 114                 return ret;
 115         }
 116
 117
 118         /* Try to avoid churning the attributes too much - we only want to do this if they have changed */
 119         ret = ldb_search(ldb, mem_ctx, &res, msg->dn, LDB_SCOPE_BASE, NULL, "dn=%s", ldb_dn_get_linearized(msg->dn));
 120         if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 121                 ret = ldb_add(ldb, msg);
 122         } else if (ret != LDB_SUCCESS) {
 123         } else if (res->count != 1) {
 124                 ret = ldb_add(ldb, msg);
 125         } else {
 126                 ret = LDB_SUCCESS;
 127                 /* Annoyingly added to our search results */
 128                 ldb_msg_remove_attr(res->msgs[0], "distinguishedName");
 129
 130                 mod_msg = ldb_msg_diff(ldb, res->msgs[0], msg);
 131                 if (mod_msg->num_elements > 0) {
 132                         ret = ldb_modify(ldb, mod_msg);
 133                 }
 134         }
 135
 136         if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
 137                 /* We might be on a read-only DB */
 138                 ret = LDB_SUCCESS;
 139         }
 140         if (ret != LDB_SUCCESS) {
 141                 talloc_free(mem_ctx);
 142                 return ret;
 143         }
 144
 145         /* Now write out the indexs, as found in the schema (if they have changed) */
 146
 147         ret = ldb_search(ldb, mem_ctx, &res_idx, msg_idx->dn, LDB_SCOPE_BASE, NULL, "dn=%s", ldb_dn_get_linearized(msg_idx->dn));
 148         if (ret == LDB_ERR_NO_SUCH_OBJECT) {
 149                 ret = ldb_add(ldb, msg_idx);
 150         } else if (ret != LDB_SUCCESS) {
 151         } else if (res->count != 1) {
 152                 ret = ldb_add(ldb, msg_idx);
 153         } else {
 154                 ret = LDB_SUCCESS;
 155                 /* Annoyingly added to our search results */
 156                 ldb_msg_remove_attr(res_idx->msgs[0], "distinguishedName");
 157
 158                 mod_msg = ldb_msg_diff(ldb, res_idx->msgs[0], msg_idx);
 159                 if (mod_msg->num_elements > 0) {
 160                         ret = ldb_modify(ldb, mod_msg);
 161                 }
 162         }
 163         if (ret == LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS) {
 164                 /* We might be on a read-only DB */
 165                 ret = LDB_SUCCESS;
 166         }
 167         talloc_free(mem_ctx);
 168         return ret;
 169 }
 170
 171
 172 /**
 173  * Attach the schema to an opaque pointer on the ldb, so ldb modules
 174  * can find it
 175  */
 176
 177 int dsdb_set_schema(struct ldb_context *ldb, struct dsdb_schema *schema)
 178 {
 179         int ret;
 180
 181         ret = ldb_set_opaque(ldb, "dsdb_schema", schema);
 182         if (ret != LDB_SUCCESS) {
 183                 return ret;
 184         }
 185
 186         /* Set the new attributes based on the new schema */
 187         ret = dsdb_schema_set_attributes(ldb, schema, true);
 188         if (ret != LDB_SUCCESS) {
 189                 return ret;
 190         }
 191
 192         talloc_steal(ldb, schema);
 193
 194         return LDB_SUCCESS;
 195 }
 196
 197 /**
 198  * Global variable to hold one copy of the schema, used to avoid memory bloat
 199  */
 200 static struct dsdb_schema *global_schema;
 201
 202 /**
 203  * Make this ldb use the 'global' schema, setup to avoid having multiple copies in this process
 204  */
 205 int dsdb_set_global_schema(struct ldb_context *ldb)
 206 {
 207         int ret;
 208         if (!global_schema) {
 209                 return LDB_SUCCESS;
 210         }
 211         ret = ldb_set_opaque(ldb, "dsdb_schema", global_schema);
 212         if (ret != LDB_SUCCESS) {
 213                 return ret;
 214         }
 215
 216         /* Set the new attributes based on the new schema */
 217         ret = dsdb_schema_set_attributes(ldb, global_schema, false);
 218         if (ret != LDB_SUCCESS) {
 219                 return ret;
 220         }
 221
 222         /* Keep a reference to this schema, just incase the global copy is replaced */
 223         if (talloc_reference(ldb, global_schema) == NULL) {
 224                 return LDB_ERR_OPERATIONS_ERROR;
 225         }
 226
 227         return LDB_SUCCESS;
 228 }
 229
 230 /**
 231  * Find the schema object for this ldb
 232  */
 233
 234 struct dsdb_schema *dsdb_get_schema(struct ldb_context *ldb)
 235 {
 236         const void *p;
 237         struct dsdb_schema *schema;
 238
 239         /* see if we have a cached copy */
 240         p = ldb_get_opaque(ldb, "dsdb_schema");
 241         if (!p) {
 242                 return NULL;
 243         }
 244
 245         schema = talloc_get_type(p, struct dsdb_schema);
 246         if (!schema) {
 247                 return NULL;
 248         }
 249
 250         return schema;
 251 }
 252
 253 /**
 254  * Make the schema found on this ldb the 'global' schema
 255  */
 256
 257 void dsdb_make_schema_global(struct ldb_context *ldb)
 258 {
 259         struct dsdb_schema *schema = dsdb_get_schema(ldb);
 260         if (!schema) {
 261                 return;
 262         }
 263
 264         if (global_schema) {
 265                 talloc_unlink(talloc_autofree_context(), schema);
 266         }
 267
 268         talloc_steal(talloc_autofree_context(), schema);
 269         global_schema = schema;
 270
 271         dsdb_set_global_schema(ldb);
 272 }
 273
 274
 275 /**
 276  * Rather than read a schema from the LDB itself, read it from an ldif
 277  * file.  This allows schema to be loaded and used while adding the
 278  * schema itself to the directory.
 279  */
 280
 281 WERROR dsdb_attach_schema_from_ldif_file(struct ldb_context *ldb, const char *pf, const char *df)
 282 {
 283         struct ldb_ldif *ldif;
 284         struct ldb_message *msg;
 285         TALLOC_CTX *mem_ctx;
 286         WERROR status;
 287         int ret;
 288         struct dsdb_schema *schema;
 289         const struct ldb_val *prefix_val;
 290         const struct ldb_val *info_val;
 291         struct ldb_val info_val_default;
 292
 293         mem_ctx = talloc_new(ldb);
 294         if (!mem_ctx) {
 295                 goto nomem;
 296         }
 297
 298         schema = dsdb_new_schema(mem_ctx, lp_iconv_convenience(ldb_get_opaque(ldb, "loadparm")));
 299
 300         schema->fsmo.we_are_master = true;
 301         schema->fsmo.master_dn = ldb_dn_new_fmt(schema, ldb, "@PROVISION_SCHEMA_MASTER");
 302         if (!schema->fsmo.master_dn) {
 303                 goto nomem;
 304         }
 305
 306         /*
 307          * load the prefixMap attribute from pf
 308          */
 309         ldif = ldb_ldif_read_string(ldb, &pf);
 310         if (!ldif) {
 311                 status = WERR_INVALID_PARAM;
 312                 goto failed;
 313         }
 314         talloc_steal(mem_ctx, ldif);
 315
 316         msg = ldb_msg_canonicalize(ldb, ldif->msg);
 317         if (!msg) {
 318                 goto nomem;
 319         }
 320         talloc_steal(mem_ctx, msg);
 321         talloc_free(ldif);
 322
 323         prefix_val = ldb_msg_find_ldb_val(msg, "prefixMap");
 324         if (!prefix_val) {
 325                 status = WERR_INVALID_PARAM;
 326                 goto failed;
 327         }
 328
 329         info_val = ldb_msg_find_ldb_val(msg, "schemaInfo");
 330         if (!info_val) {
 331                 info_val_default = strhex_to_data_blob("FF0000000000000000000000000000000000000000");
 332                 if (!info_val_default.data) {
 333                         goto nomem;
 334                 }
 335                 talloc_steal(mem_ctx, info_val_default.data);
 336                 info_val = &info_val_default;
 337         }
 338
 339         status = dsdb_load_oid_mappings_ldb(schema, prefix_val, info_val);
 340         if (!W_ERROR_IS_OK(status)) {
 341                 goto failed;
 342         }
 343
 344         /*
 345          * load the attribute and class definitions outof df
 346          */
 347         while ((ldif = ldb_ldif_read_string(ldb, &df))) {
 348                 bool is_sa;
 349                 bool is_sc;
 350
 351                 talloc_steal(mem_ctx, ldif);
 352
 353                 msg = ldb_msg_canonicalize(ldb, ldif->msg);
 354                 if (!msg) {
 355                         goto nomem;
 356                 }
 357
 358                 talloc_steal(mem_ctx, msg);
 359                 talloc_free(ldif);
 360
 361                 is_sa = ldb_msg_check_string_attribute(msg, "objectClass", "attributeSchema");
 362                 is_sc = ldb_msg_check_string_attribute(msg, "objectClass", "classSchema");
 363
 364                 if (is_sa) {
 365                         struct dsdb_attribute *sa;
 366
 367                         sa = talloc_zero(schema, struct dsdb_attribute);
 368                         if (!sa) {
 369                                 goto nomem;
 370                         }
 371
 372                         status = dsdb_attribute_from_ldb(schema, msg, sa, sa);
 373                         if (!W_ERROR_IS_OK(status)) {
 374                                 goto failed;
 375                         }
 376
 377                         DLIST_ADD_END(schema->attributes, sa, struct dsdb_attribute *);
 378                 } else if (is_sc) {
 379                         struct dsdb_class *sc;
 380
 381                         sc = talloc_zero(schema, struct dsdb_class);
 382                         if (!sc) {
 383                                 goto nomem;
 384                         }
 385
 386                         status = dsdb_class_from_ldb(schema, msg, sc, sc);
 387                         if (!W_ERROR_IS_OK(status)) {
 388                                 goto failed;
 389                         }
 390
 391                         DLIST_ADD_END(schema->classes, sc, struct dsdb_class *);
 392                 }
 393         }
 394
 395         ret = dsdb_set_schema(ldb, schema);
 396         if (ret != LDB_SUCCESS) {
 397                 status = WERR_FOOBAR;
 398                 goto failed;
 399         }
 400
 401         goto done;
 402
 403 nomem:
 404         status = WERR_NOMEM;
 405 failed:
 406 done:
 407         talloc_free(mem_ctx);
 408         return status;
 409 }