git.sur5r.net Git - openldap/blob - servers/slapd/schema_check.c

   1 /* schema_check.c - routines to enforce schema definitions */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2002 The OpenLDAP Foundation, All Rights Reserved.
   5  * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
   6  */
   7
   8 #include "portable.h"
   9
  10 #include <stdio.h>
  11
  12 #include <ac/ctype.h>
  13 #include <ac/string.h>
  14 #include <ac/socket.h>
  15
  16 #include "slap.h"
  17 #include "ldap_pvt.h"
  18
  19 static char * oc_check_required(
  20         Entry *e,
  21         ObjectClass *oc,
  22         struct berval *ocname );
  23
  24 /*
  25  * entry_schema_check - check that entry e conforms to the schema required
  26  * by its object class(es).
  27  *
  28  * returns 0 if so, non-zero otherwise.
  29  */
  30
  31 int
  32 entry_schema_check(
  33         Entry *e, Attribute *oldattrs,
  34         const char** text,
  35         char *textbuf, size_t textlen )
  36 {
  37         Attribute       *a, *asc, *aoc;
  38         ObjectClass *sc, *oc;
  39         int     rc, i;
  40         struct berval nsc;
  41         AttributeDescription *ad_structuralObjectClass
  42                 = slap_schema.si_ad_structuralObjectClass;
  43         AttributeDescription *ad_objectClass
  44                 = slap_schema.si_ad_objectClass;
  45         int extensible = 0;
  46
  47         *text = textbuf;
  48
  49         /* misc attribute checks */
  50         for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
  51                 /* there should be at least one value */
  52                 assert( a->a_vals );
  53                 assert( a->a_vals[0].bv_val != NULL );
  54
  55                 if( a->a_desc->ad_type->sat_check ) {
  56                         int rc = (a->a_desc->ad_type->sat_check)(
  57                                 e, a, text, textbuf, textlen );
  58                         if( rc != LDAP_SUCCESS ) {
  59                                 return rc;
  60                         }
  61                 }
  62
  63                 /* if single value type, check for multiple values */
  64                 if( is_at_single_value( a->a_desc->ad_type ) &&
  65                         a->a_vals[1].bv_val != NULL )
  66                 {
  67                         char *type = a->a_desc->ad_cname.bv_val;
  68
  69                         snprintf( textbuf, textlen,
  70                                 "attribute '%s' cannot have multiple values",
  71                                 type );
  72
  73 #ifdef NEW_LOGGING
  74                         LDAP_LOG(( "schema", LDAP_LEVEL_INFO,
  75                                 "entry_schema_check: dn=\"%s\" %s\n",
  76                                 e->e_dn, textbuf ));
  77 #else
  78                         Debug( LDAP_DEBUG_ANY,
  79                             "Entry (%s), %s\n",
  80                             e->e_dn, textbuf, 0 );
  81 #endif
  82
  83                         return LDAP_CONSTRAINT_VIOLATION;
  84                 }
  85         }
  86
  87         /* it's a REALLY bad idea to disable schema checks */
  88         if( !global_schemacheck ) return LDAP_SUCCESS;
  89
  90         /* find the object class attribute - could error out here */
  91         asc = attr_find( e->e_attrs, ad_structuralObjectClass );
  92         if ( asc == NULL ) {
  93 #ifdef NEW_LOGGING
  94                 LDAP_LOG(( "schema", LDAP_LEVEL_INFO, "entry_schema_check: "
  95                         "No structuralObjectClass for entry (%s)\n",
  96                         e->e_dn ));
  97 #else
  98                 Debug( LDAP_DEBUG_ANY,
  99                         "No structuralObjectClass for entry (%s)\n",
 100                     e->e_dn, 0, 0 );
 101 #endif
 102
 103                 *text = "no structuralObjectClass operational attribute";
 104                 return LDAP_OBJECT_CLASS_VIOLATION;
 105         }
 106
 107         assert( asc->a_vals != NULL );
 108         assert( asc->a_vals[0].bv_val != NULL );
 109         assert( asc->a_vals[1].bv_val == NULL );
 110
 111         sc = oc_bvfind( &asc->a_vals[0] );
 112         if( sc == NULL ) {
 113                 snprintf( textbuf, textlen,
 114                         "unrecognized structuralObjectClass '%s'",
 115                         asc->a_vals[0].bv_val );
 116
 117 #ifdef NEW_LOGGING
 118                 LDAP_LOG(( "schema", LDAP_LEVEL_INFO,
 119                         "entry_schema_check: dn (%s), %s\n",
 120                         e->e_dn, textbuf ));
 121 #else
 122                 Debug( LDAP_DEBUG_ANY,
 123                         "entry_check_schema(%s): %s\n",
 124                         e->e_dn, textbuf, 0 );
 125 #endif
 126
 127                 return LDAP_OBJECT_CLASS_VIOLATION;
 128         }
 129
 130         if( sc->soc_kind != LDAP_SCHEMA_STRUCTURAL ) {
 131                 snprintf( textbuf, textlen,
 132                         "structuralObjectClass '%s' is not STRUCTURAL",
 133                         asc->a_vals[0].bv_val );
 134
 135 #ifdef NEW_LOGGING
 136                 LDAP_LOG(( "schema", LDAP_LEVEL_INFO,
 137                         "entry_schema_check: dn (%s), %s\n",
 138                         e->e_dn, textbuf ));
 139 #else
 140                 Debug( LDAP_DEBUG_ANY,
 141                         "entry_check_schema(%s): %s\n",
 142                         e->e_dn, textbuf, 0 );
 143 #endif
 144
 145                 return LDAP_OBJECT_CLASS_VIOLATION;
 146         }
 147
 148         /* find the object class attribute */
 149         aoc = attr_find( e->e_attrs, ad_objectClass );
 150         if ( aoc == NULL ) {
 151 #ifdef NEW_LOGGING
 152                 LDAP_LOG(( "schema", LDAP_LEVEL_INFO,
 153                         "entry_schema_check: No objectClass for entry (%s).\n"
 154                         e->e_dn ));
 155 #else
 156                 Debug( LDAP_DEBUG_ANY, "No objectClass for entry (%s)\n",
 157                     e->e_dn, 0, 0 );
 158 #endif
 159
 160                 *text = "no objectClass attribute";
 161                 return LDAP_OBJECT_CLASS_VIOLATION;
 162         }
 163
 164         assert( aoc->a_vals != NULL );
 165         assert( aoc->a_vals[0].bv_val != NULL );
 166
 167         rc = structural_class( aoc->a_vals, &nsc, &oc, text, textbuf, textlen );
 168         if( rc != LDAP_SUCCESS ) {
 169                 return rc;
 170         } else if ( nsc.bv_len == 0 ) {
 171                 return LDAP_OBJECT_CLASS_VIOLATION;
 172         }
 173
 174         *text = textbuf;
 175
 176         if ( oc == NULL ) {
 177                 snprintf( textbuf, textlen,
 178                         "unrecognized objectClass '%s'",
 179                         aoc->a_vals[0].bv_val );
 180                 return LDAP_OBJECT_CLASS_VIOLATION;
 181
 182         } else if ( sc != oc ) {
 183                 snprintf( textbuf, textlen,
 184                         "structuralObjectClass modification from '%s' to '%s' not allowed",
 185                         asc->a_vals[0].bv_val, nsc.bv_val );
 186                 return LDAP_NO_OBJECT_CLASS_MODS;
 187         }
 188
 189         /* check that the entry has required attrs for each oc */
 190         for ( i = 0; aoc->a_vals[i].bv_val != NULL; i++ ) {
 191                 if ( (oc = oc_bvfind( &aoc->a_vals[i] )) == NULL ) {
 192                         snprintf( textbuf, textlen,
 193                                 "unrecognized objectClass '%s'",
 194                                 aoc->a_vals[i].bv_val );
 195
 196 #ifdef NEW_LOGGING
 197                         LDAP_LOG(( "schema", LDAP_LEVEL_INFO,
 198                                 "entry_schema_check: dn (%s), %s\n",
 199                                 e->e_dn, textbuf ));
 200 #else
 201                         Debug( LDAP_DEBUG_ANY,
 202                                 "entry_check_schema(%s): %s\n",
 203                                 e->e_dn, textbuf, 0 );
 204 #endif
 205
 206                         return LDAP_OBJECT_CLASS_VIOLATION;
 207
 208                 } else if ( oc->soc_kind == LDAP_SCHEMA_ABSTRACT ) {
 209                         /* object class is abstract */
 210                         if ( oc != slap_schema.si_oc_top &&
 211                                 !is_object_subclass( oc, sc ))
 212                         {
 213                                 int j;
 214                                 ObjectClass *xc = NULL;
 215                                 for( j=0; aoc->a_vals[j].bv_val; j++ ) {
 216                                         if( i != j ) {
 217                                                 xc = oc_bvfind( &aoc->a_vals[i] );
 218                                                 if( xc == NULL ) {
 219                                                         snprintf( textbuf, textlen,
 220                                                                 "unrecognized objectClass '%s'",
 221                                                                 aoc->a_vals[i].bv_val );
 222
 223 #ifdef NEW_LOGGING
 224                                                         LDAP_LOG(( "schema", LDAP_LEVEL_INFO,
 225                                                                 "entry_schema_check: dn (%s), %s\n",
 226                                                                 e->e_dn, textbuf ));
 227 #else
 228                                                         Debug( LDAP_DEBUG_ANY,
 229                                                                 "entry_check_schema(%s): %s\n",
 230                                                                 e->e_dn, textbuf, 0 );
 231 #endif
 232
 233                                                         return LDAP_OBJECT_CLASS_VIOLATION;
 234                                                 }
 235
 236                                                 /* since we previous check against the
 237                                                  * structural object of this entry, the
 238                                                  * abstract class must be a (direct or indirect)
 239                                                  * superclass of one of the auxiliary classes of
 240                                                  * the entry.
 241                                                  */
 242                                                 if ( xc->soc_kind == LDAP_SCHEMA_AUXILIARY &&
 243                                                         is_object_subclass( oc, xc ) )
 244                                                 {
 245                                                         break;;
 246                                                 }
 247
 248                                                 xc = NULL;
 249                                         }
 250                                 }
 251
 252                                 if( xc == NULL ) {
 253                                         snprintf( textbuf, textlen, "instanstantiation of "
 254                                                 "abstract objectClass '%s' not allowed",
 255                                                 aoc->a_vals[i].bv_val );
 256
 257 #ifdef NEW_LOGGING
 258                                         LDAP_LOG(( "schema", LDAP_LEVEL_INFO,
 259                                                 "entry_schema_check: dn (%s), %s\n",
 260                                                 e->e_dn, textbuf ));
 261 #else
 262                                         Debug( LDAP_DEBUG_ANY,
 263                                                 "entry_check_schema(%s): %s\n",
 264                                                 e->e_dn, textbuf, 0 );
 265 #endif
 266
 267                                         return LDAP_OBJECT_CLASS_VIOLATION;
 268                                 }
 269                         }
 270
 271                 } else if ( oc->soc_kind != LDAP_SCHEMA_STRUCTURAL || oc == sc ) {
 272                         char *s = oc_check_required( e, oc, &aoc->a_vals[i] );
 273
 274                         if (s != NULL) {
 275                                 snprintf( textbuf, textlen,
 276                                         "object class '%s' requires attribute '%s'",
 277                                         aoc->a_vals[i].bv_val, s );
 278
 279 #ifdef NEW_LOGGING
 280                                 LDAP_LOG(( "schema", LDAP_LEVEL_INFO,
 281                                         "entry_schema_check: dn=\"%s\" %s",
 282                                         e->e_dn, textbuf ));
 283 #else
 284                                 Debug( LDAP_DEBUG_ANY,
 285                                         "Entry (%s): %s\n",
 286                                         e->e_dn, textbuf, 0 );
 287 #endif
 288
 289                                 return LDAP_OBJECT_CLASS_VIOLATION;
 290                         }
 291
 292                         if( oc == slap_schema.si_oc_extensibleObject ) {
 293                                 extensible=1;
 294                         }
 295                 }
 296         }
 297
 298         if( extensible ) {
 299                 return LDAP_SUCCESS;
 300         }
 301
 302         /* check that each attr in the entry is allowed by some oc */
 303         for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 304                 int ret = oc_check_allowed( a->a_desc->ad_type, aoc->a_vals, sc );
 305                 if ( ret != LDAP_SUCCESS ) {
 306                         char *type = a->a_desc->ad_cname.bv_val;
 307
 308                         snprintf( textbuf, textlen,
 309                                 "attribute '%s' not allowed",
 310                                 type );
 311
 312 #ifdef NEW_LOGGING
 313                         LDAP_LOG(( "schema", LDAP_LEVEL_INFO,
 314                                 "entry_schema_check: dn=\"%s\" %s\n",
 315                                 e->e_dn, textbuf ));
 316 #else
 317                         Debug( LDAP_DEBUG_ANY,
 318                             "Entry (%s), %s\n",
 319                             e->e_dn, textbuf, 0 );
 320 #endif
 321
 322                         return ret;
 323                 }
 324         }
 325
 326         return LDAP_SUCCESS;
 327 }
 328
 329 static char *
 330 oc_check_required(
 331         Entry *e,
 332         ObjectClass *oc,
 333         struct berval *ocname )
 334 {
 335         AttributeType   *at;
 336         int             i;
 337         Attribute       *a;
 338
 339 #ifdef NEW_LOGGING
 340         LDAP_LOG(( "schema", LDAP_LEVEL_ENTRY,
 341                 "oc_check_required: dn (%s), objectClass \"%s\"\n",
 342         e->e_dn, ocname->bv_val ));
 343 #else
 344         Debug( LDAP_DEBUG_TRACE,
 345                 "oc_check_required entry (%s), objectClass \"%s\"\n",
 346                 e->e_dn, ocname->bv_val, 0 );
 347 #endif
 348
 349
 350         /* check for empty oc_required */
 351         if(oc->soc_required == NULL) {
 352                 return NULL;
 353         }
 354
 355         /* for each required attribute */
 356         for ( i = 0; oc->soc_required[i] != NULL; i++ ) {
 357                 at = oc->soc_required[i];
 358                 /* see if it's in the entry */
 359                 for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 360                         if( a->a_desc->ad_type == at ) {
 361                                 break;
 362                         }
 363                 }
 364                 /* not there => schema violation */
 365                 if ( a == NULL ) {
 366                         return at->sat_cname.bv_val;
 367                 }
 368         }
 369
 370         return( NULL );
 371 }
 372
 373 int oc_check_allowed(
 374         AttributeType *at,
 375         BVarray ocl,
 376         ObjectClass *sc )
 377 {
 378         int             i, j;
 379
 380 #ifdef NEW_LOGGING
 381         LDAP_LOG(( "schema", LDAP_LEVEL_ENTRY,
 382                 "oc_check_allowed: type \"%s\"\n", at->sat_cname.bv_val ));
 383 #else
 384         Debug( LDAP_DEBUG_TRACE,
 385                 "oc_check_allowed type \"%s\"\n",
 386                 at->sat_cname.bv_val, 0, 0 );
 387 #endif
 388
 389         /* always allow objectClass attribute */
 390         if ( strcasecmp( at->sat_cname.bv_val, "objectClass" ) == 0 ) {
 391                 return LDAP_SUCCESS;
 392         }
 393
 394         /*
 395          * All operational attributions are allowed by schema rules.
 396          */
 397         if( is_at_operational(at) ) {
 398                 return LDAP_SUCCESS;
 399         }
 400
 401         /* check to see if its allowed by the structuralObjectClass */
 402         if( sc ) {
 403                 /* does it require the type? */
 404                 for ( j = 0; sc->soc_required != NULL &&
 405                         sc->soc_required[j] != NULL; j++ )
 406                 {
 407                         if( at == sc->soc_required[j] ) {
 408                                 return LDAP_SUCCESS;
 409                         }
 410                 }
 411
 412                 /* does it allow the type? */
 413                 for ( j = 0; sc->soc_allowed != NULL &&
 414                         sc->soc_allowed[j] != NULL; j++ )
 415                 {
 416                         if( at == sc->soc_allowed[j] ) {
 417                                 return LDAP_SUCCESS;
 418                         }
 419                 }
 420         }
 421
 422         /* check that the type appears as req or opt in at least one oc */
 423         for ( i = 0; ocl[i].bv_val != NULL; i++ ) {
 424                 /* if we know about the oc */
 425                 ObjectClass     *oc = oc_bvfind( &ocl[i] );
 426                 if ( oc != NULL && oc->soc_kind != LDAP_SCHEMA_ABSTRACT &&
 427                         ( sc == NULL || oc->soc_kind == LDAP_SCHEMA_AUXILIARY ))
 428                 {
 429                         /* does it require the type? */
 430                         for ( j = 0; oc->soc_required != NULL &&
 431                                 oc->soc_required[j] != NULL; j++ )
 432                         {
 433                                 if( at == oc->soc_required[j] ) {
 434                                         return LDAP_SUCCESS;
 435                                 }
 436                         }
 437                         /* does it allow the type? */
 438                         for ( j = 0; oc->soc_allowed != NULL &&
 439                                 oc->soc_allowed[j] != NULL; j++ )
 440                         {
 441                                 if( at == oc->soc_allowed[j] ) {
 442                                         return LDAP_SUCCESS;
 443                                 }
 444                         }
 445                 }
 446         }
 447
 448         /* not allowed by any oc */
 449         return LDAP_OBJECT_CLASS_VIOLATION;
 450 }
 451
 452 /*
 453  * Determine the structural object class from a set of OIDs
 454  */
 455 int structural_class(
 456         BVarray ocs,
 457         struct berval *scbv,
 458         ObjectClass **scp,
 459         const char **text,
 460         char *textbuf, size_t textlen )
 461 {
 462         int i;
 463         ObjectClass *oc;
 464         ObjectClass *sc = NULL;
 465         int scn = -1;
 466
 467         *text = "structural_class: internal error";
 468         scbv->bv_len = 0;
 469
 470         for( i=0; ocs[i].bv_val; i++ ) {
 471                 oc = oc_bvfind( &ocs[i] );
 472
 473                 if( oc == NULL ) {
 474                         snprintf( textbuf, textlen,
 475                                 "unrecongized objectClass '%s'",
 476                                 ocs[i].bv_val );
 477                         *text = textbuf;
 478                         return LDAP_OBJECT_CLASS_VIOLATION;
 479                 }
 480
 481                 if( oc->soc_kind == LDAP_SCHEMA_STRUCTURAL ) {
 482                         if( sc == NULL || is_object_subclass( sc, oc ) ) {
 483                                 sc = oc;
 484                                 scn = i;
 485
 486                         } else if ( !is_object_subclass( oc, sc ) ) {
 487                                 int j;
 488                                 ObjectClass *xc = NULL;
 489
 490                                 /* find common superior */
 491                                 for( j=i+1; ocs[j].bv_val; j++ ) {
 492                                         xc = oc_bvfind( &ocs[j] );
 493
 494                                         if( xc == NULL ) {
 495                                                 snprintf( textbuf, textlen,
 496                                                         "unrecongized objectClass '%s'",
 497                                                         ocs[i].bv_val );
 498                                                 *text = textbuf;
 499                                                 return LDAP_OBJECT_CLASS_VIOLATION;
 500                                         }
 501
 502                                         if( xc->soc_kind != LDAP_SCHEMA_STRUCTURAL ) {
 503                                                 xc = NULL;
 504                                                 continue;
 505                                         }
 506
 507                                         if( is_object_subclass( sc, xc ) &&
 508                                                 is_object_subclass( oc, xc ) )
 509                                         {
 510                                                 /* found common subclass */
 511                                                 break;
 512                                         }
 513
 514                                         xc = NULL;
 515                                 }
 516
 517                                 if( xc == NULL ) {
 518                                         /* no common subclass */
 519                                         snprintf( textbuf, textlen,
 520                                                 "invalid structural object class chain (%s/%s)",
 521                                                 ocs[scn].bv_val, ocs[i].bv_val );
 522                                         *text = textbuf;
 523                                         return LDAP_OBJECT_CLASS_VIOLATION;
 524                                 }
 525                         }
 526                 }
 527         }
 528
 529         if( scp )
 530                 *scp = sc;
 531
 532         if( sc == NULL ) {
 533                 *text = "no structural object classes provided";
 534                 return LDAP_OBJECT_CLASS_VIOLATION;
 535         }
 536
 537         *scbv = ocs[scn];
 538         return LDAP_SUCCESS;
 539 }
 540
 541 /*
 542  * Return structural object class from list of modifications
 543  */
 544 int mods_structural_class(
 545         Modifications *mods,
 546         struct berval *sc,
 547         const char **text,
 548         char *textbuf, size_t textlen )
 549 {
 550         Modifications *ocmod = NULL;
 551
 552         for( ; mods != NULL; mods = mods->sml_next ) {
 553                 if( mods->sml_desc == slap_schema.si_ad_objectClass ) {
 554                         if( ocmod != NULL ) {
 555                                 *text = "entry has multiple objectClass attributes";
 556                                 return LDAP_OBJECT_CLASS_VIOLATION;
 557                         }
 558                         ocmod = mods;
 559                 }
 560         }
 561
 562         if( ocmod == NULL ) {
 563                 *text = "entry has no objectClass attribute";
 564                 return LDAP_OBJECT_CLASS_VIOLATION;
 565         }
 566
 567         if( ocmod->sml_bvalues == NULL || ocmod->sml_bvalues[0].bv_val == NULL ) {
 568                 *text = "objectClass attribute has no values";
 569                 return LDAP_OBJECT_CLASS_VIOLATION;
 570         }
 571
 572         return structural_class( ocmod->sml_bvalues, sc, NULL,
 573                 text, textbuf, textlen );
 574 }