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         Backend *be,
  34         Entry *e,
  35         Attribute *oldattrs,
  36         const char** text,
  37         char *textbuf, size_t textlen )
  38 {
  39         Attribute       *a, *asc, *aoc;
  40         ObjectClass *sc, *oc;
  41         int     rc, i;
  42         struct berval nsc;
  43         AttributeDescription *ad_structuralObjectClass
  44                 = slap_schema.si_ad_structuralObjectClass;
  45         AttributeDescription *ad_objectClass
  46                 = slap_schema.si_ad_objectClass;
  47         int extensible = 0;
  48         int subentry = is_entry_subentry( e );
  49         int collectiveSubentry = 0;
  50
  51         if( subentry) collectiveSubentry = is_entry_collectiveAttributeSubentry( e );
  52
  53         *text = textbuf;
  54
  55         /* misc attribute checks */
  56         for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
  57                 const char *type = a->a_desc->ad_cname.bv_val;
  58
  59                 /* there should be at least one value */
  60                 assert( a->a_vals );
  61                 assert( a->a_vals[0].bv_val != NULL );
  62
  63                 if( a->a_desc->ad_type->sat_check ) {
  64                         int rc = (a->a_desc->ad_type->sat_check)(
  65                                 be, e, a, text, textbuf, textlen );
  66                         if( rc != LDAP_SUCCESS ) {
  67                                 return rc;
  68                         }
  69                 }
  70
  71                 if( !collectiveSubentry && is_at_collective( a->a_desc->ad_type ) ) {
  72                         snprintf( textbuf, textlen,
  73                                 "'%s' can only appear in collectiveAttributeSubentry",
  74                                 type );
  75                         return LDAP_OBJECT_CLASS_VIOLATION;
  76                 }
  77
  78                 /* if single value type, check for multiple values */
  79                 if( is_at_single_value( a->a_desc->ad_type ) &&
  80                         a->a_vals[1].bv_val != NULL )
  81                 {
  82                         snprintf( textbuf, textlen,
  83                                 "attribute '%s' cannot have multiple values",
  84                                 type );
  85
  86 #ifdef NEW_LOGGING
  87                         LDAP_LOG( OPERATION, INFO,
  88                                 "entry_schema_check: dn=\"%s\" %s\n", e->e_dn, textbuf, 0 );
  89 #else
  90                         Debug( LDAP_DEBUG_ANY,
  91                             "Entry (%s), %s\n",
  92                             e->e_dn, textbuf, 0 );
  93 #endif
  94
  95                         return LDAP_CONSTRAINT_VIOLATION;
  96                 }
  97         }
  98
  99         /* it's a REALLY bad idea to disable schema checks */
 100         if( !global_schemacheck ) return LDAP_SUCCESS;
 101
 102         /* find the structural object class attribute */
 103         asc = attr_find( e->e_attrs, ad_structuralObjectClass );
 104         if ( asc == NULL ) {
 105 #ifdef NEW_LOGGING
 106                 LDAP_LOG( OPERATION, INFO,
 107                         "entry_schema_check: No structuralObjectClass for entry (%s)\n",
 108                         e->e_dn, 0, 0 );
 109 #else
 110                 Debug( LDAP_DEBUG_ANY,
 111                         "No structuralObjectClass for entry (%s)\n",
 112                     e->e_dn, 0, 0 );
 113 #endif
 114
 115                 *text = "no structuralObjectClass operational attribute";
 116                 return LDAP_OBJECT_CLASS_VIOLATION;
 117         }
 118
 119         assert( asc->a_vals != NULL );
 120         assert( asc->a_vals[0].bv_val != NULL );
 121         assert( asc->a_vals[1].bv_val == NULL );
 122
 123         sc = oc_bvfind( &asc->a_vals[0] );
 124         if( sc == NULL ) {
 125                 snprintf( textbuf, textlen,
 126                         "unrecognized structuralObjectClass '%s'",
 127                         asc->a_vals[0].bv_val );
 128
 129 #ifdef NEW_LOGGING
 130                 LDAP_LOG( OPERATION, INFO,
 131                         "entry_schema_check: dn (%s), %s\n", e->e_dn, textbuf, 0 );
 132 #else
 133                 Debug( LDAP_DEBUG_ANY,
 134                         "entry_check_schema(%s): %s\n",
 135                         e->e_dn, textbuf, 0 );
 136 #endif
 137
 138                 return LDAP_OBJECT_CLASS_VIOLATION;
 139         }
 140
 141         if( sc->soc_kind != LDAP_SCHEMA_STRUCTURAL ) {
 142                 snprintf( textbuf, textlen,
 143                         "structuralObjectClass '%s' is not STRUCTURAL",
 144                         asc->a_vals[0].bv_val );
 145
 146 #ifdef NEW_LOGGING
 147                 LDAP_LOG( OPERATION, INFO,
 148                         "entry_schema_check: dn (%s), %s\n", e->e_dn, textbuf, 0 );
 149 #else
 150                 Debug( LDAP_DEBUG_ANY,
 151                         "entry_check_schema(%s): %s\n",
 152                         e->e_dn, textbuf, 0 );
 153 #endif
 154
 155                 return LDAP_OBJECT_CLASS_VIOLATION;
 156         }
 157
 158         /* find the object class attribute */
 159         aoc = attr_find( e->e_attrs, ad_objectClass );
 160         if ( aoc == NULL ) {
 161 #ifdef NEW_LOGGING
 162                 LDAP_LOG( OPERATION, INFO,
 163                         "entry_schema_check: No objectClass for entry (%s).\n",
 164                         e->e_dn, 0, 0 );
 165 #else
 166                 Debug( LDAP_DEBUG_ANY, "No objectClass for entry (%s)\n",
 167                     e->e_dn, 0, 0 );
 168 #endif
 169
 170                 *text = "no objectClass attribute";
 171                 return LDAP_OBJECT_CLASS_VIOLATION;
 172         }
 173
 174         assert( aoc->a_vals != NULL );
 175         assert( aoc->a_vals[0].bv_val != NULL );
 176
 177         rc = structural_class( aoc->a_vals, &nsc, &oc, text, textbuf, textlen );
 178         if( rc != LDAP_SUCCESS ) {
 179                 return rc;
 180         } else if ( nsc.bv_len == 0 ) {
 181                 return LDAP_OBJECT_CLASS_VIOLATION;
 182         }
 183
 184         *text = textbuf;
 185
 186         if ( oc == NULL ) {
 187                 snprintf( textbuf, textlen,
 188                         "unrecognized objectClass '%s'",
 189                         aoc->a_vals[0].bv_val );
 190                 return LDAP_OBJECT_CLASS_VIOLATION;
 191
 192         } else if ( sc != oc ) {
 193                 snprintf( textbuf, textlen,
 194                         "structuralObjectClass modification from '%s' to '%s' not allowed",
 195                         asc->a_vals[0].bv_val, nsc.bv_val );
 196                 return LDAP_NO_OBJECT_CLASS_MODS;
 197         }
 198
 199         /* check that the entry has required attrs for each oc */
 200         for ( i = 0; aoc->a_vals[i].bv_val != NULL; i++ ) {
 201                 if ( (oc = oc_bvfind( &aoc->a_vals[i] )) == NULL ) {
 202                         snprintf( textbuf, textlen,
 203                                 "unrecognized objectClass '%s'",
 204                                 aoc->a_vals[i].bv_val );
 205
 206 #ifdef NEW_LOGGING
 207                         LDAP_LOG( OPERATION, INFO,
 208                                 "entry_schema_check: dn (%s), %s\n", e->e_dn, textbuf, 0 );
 209 #else
 210                         Debug( LDAP_DEBUG_ANY,
 211                                 "entry_check_schema(%s): %s\n",
 212                                 e->e_dn, textbuf, 0 );
 213 #endif
 214
 215                         return LDAP_OBJECT_CLASS_VIOLATION;
 216                 }
 217
 218                 if ( oc->soc_check ) {
 219                         int rc = (oc->soc_check)( be, e, oc,
 220                                 text, textbuf, textlen );
 221                         if( rc != LDAP_SUCCESS ) {
 222                                 return rc;
 223                         }
 224                 }
 225
 226                 if ( oc->soc_kind == LDAP_SCHEMA_ABSTRACT ) {
 227                         /* object class is abstract */
 228                         if ( oc != slap_schema.si_oc_top &&
 229                                 !is_object_subclass( oc, sc ))
 230                         {
 231                                 int j;
 232                                 ObjectClass *xc = NULL;
 233                                 for( j=0; aoc->a_vals[j].bv_val; j++ ) {
 234                                         if( i != j ) {
 235                                                 xc = oc_bvfind( &aoc->a_vals[i] );
 236                                                 if( xc == NULL ) {
 237                                                         snprintf( textbuf, textlen,
 238                                                                 "unrecognized objectClass '%s'",
 239                                                                 aoc->a_vals[i].bv_val );
 240
 241 #ifdef NEW_LOGGING
 242                                                         LDAP_LOG( OPERATION, INFO,
 243                                                                 "entry_schema_check: dn (%s), %s\n",
 244                                                                 e->e_dn, textbuf, 0 );
 245 #else
 246                                                         Debug( LDAP_DEBUG_ANY,
 247                                                                 "entry_check_schema(%s): %s\n",
 248                                                                 e->e_dn, textbuf, 0 );
 249 #endif
 250
 251                                                         return LDAP_OBJECT_CLASS_VIOLATION;
 252                                                 }
 253
 254                                                 /* since we previous check against the
 255                                                  * structural object of this entry, the
 256                                                  * abstract class must be a (direct or indirect)
 257                                                  * superclass of one of the auxiliary classes of
 258                                                  * the entry.
 259                                                  */
 260                                                 if ( xc->soc_kind == LDAP_SCHEMA_AUXILIARY &&
 261                                                         is_object_subclass( oc, xc ) )
 262                                                 {
 263                                                         xc = NULL;
 264                                                         break;
 265                                                 }
 266                                         }
 267                                 }
 268
 269                                 if( xc == NULL ) {
 270                                         snprintf( textbuf, textlen, "instanstantiation of "
 271                                                 "abstract objectClass '%s' not allowed",
 272                                                 aoc->a_vals[i].bv_val );
 273
 274 #ifdef NEW_LOGGING
 275                                         LDAP_LOG( OPERATION, INFO,
 276                                                 "entry_schema_check: dn (%s), %s\n",
 277                                                 e->e_dn, textbuf, 0 );
 278 #else
 279                                         Debug( LDAP_DEBUG_ANY,
 280                                                 "entry_check_schema(%s): %s\n",
 281                                                 e->e_dn, textbuf, 0 );
 282 #endif
 283
 284                                         return LDAP_OBJECT_CLASS_VIOLATION;
 285                                 }
 286                         }
 287
 288                 } else if ( oc->soc_kind != LDAP_SCHEMA_STRUCTURAL || oc == sc ) {
 289                         char *s = oc_check_required( e, oc, &aoc->a_vals[i] );
 290
 291                         if (s != NULL) {
 292                                 snprintf( textbuf, textlen,
 293                                         "object class '%s' requires attribute '%s'",
 294                                         aoc->a_vals[i].bv_val, s );
 295
 296 #ifdef NEW_LOGGING
 297                                 LDAP_LOG( OPERATION, INFO,
 298                                         "entry_schema_check: dn=\"%s\" %s", e->e_dn, textbuf, 0 );
 299 #else
 300                                 Debug( LDAP_DEBUG_ANY,
 301                                         "Entry (%s): %s\n",
 302                                         e->e_dn, textbuf, 0 );
 303 #endif
 304
 305                                 return LDAP_OBJECT_CLASS_VIOLATION;
 306                         }
 307
 308                         if( oc == slap_schema.si_oc_extensibleObject ) {
 309                                 extensible=1;
 310                         }
 311                 }
 312         }
 313
 314         if( extensible ) {
 315                 return LDAP_SUCCESS;
 316         }
 317
 318         /* check that each attr in the entry is allowed by some oc */
 319         for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 320                 int ret = oc_check_allowed( a->a_desc->ad_type, aoc->a_vals, sc );
 321                 if ( ret != LDAP_SUCCESS ) {
 322                         char *type = a->a_desc->ad_cname.bv_val;
 323
 324                         snprintf( textbuf, textlen,
 325                                 "attribute '%s' not allowed",
 326                                 type );
 327
 328 #ifdef NEW_LOGGING
 329                         LDAP_LOG( OPERATION, INFO,
 330                                 "entry_schema_check: dn=\"%s\" %s\n", e->e_dn, textbuf, 0);
 331 #else
 332                         Debug( LDAP_DEBUG_ANY,
 333                             "Entry (%s), %s\n",
 334                             e->e_dn, textbuf, 0 );
 335 #endif
 336
 337                         return ret;
 338                 }
 339         }
 340
 341         return LDAP_SUCCESS;
 342 }
 343
 344 static char *
 345 oc_check_required(
 346         Entry *e,
 347         ObjectClass *oc,
 348         struct berval *ocname )
 349 {
 350         AttributeType   *at;
 351         int             i;
 352         Attribute       *a;
 353
 354 #ifdef NEW_LOGGING
 355         LDAP_LOG( OPERATION, ENTRY,
 356                 "oc_check_required: dn (%s), objectClass \"%s\"\n",
 357                 e->e_dn, ocname->bv_val, 0 );
 358 #else
 359         Debug( LDAP_DEBUG_TRACE,
 360                 "oc_check_required entry (%s), objectClass \"%s\"\n",
 361                 e->e_dn, ocname->bv_val, 0 );
 362 #endif
 363
 364
 365         /* check for empty oc_required */
 366         if(oc->soc_required == NULL) {
 367                 return NULL;
 368         }
 369
 370         /* for each required attribute */
 371         for ( i = 0; oc->soc_required[i] != NULL; i++ ) {
 372                 at = oc->soc_required[i];
 373                 /* see if it's in the entry */
 374                 for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 375                         if( a->a_desc->ad_type == at ) {
 376                                 break;
 377                         }
 378                 }
 379                 /* not there => schema violation */
 380                 if ( a == NULL ) {
 381                         return at->sat_cname.bv_val;
 382                 }
 383         }
 384
 385         return( NULL );
 386 }
 387
 388 int oc_check_allowed(
 389         AttributeType *at,
 390         BerVarray ocl,
 391         ObjectClass *sc )
 392 {
 393         int             i, j;
 394
 395 #ifdef NEW_LOGGING
 396         LDAP_LOG( OPERATION, ENTRY,
 397                 "oc_check_allowed: type \"%s\"\n", at->sat_cname.bv_val, 0, 0 );
 398 #else
 399         Debug( LDAP_DEBUG_TRACE,
 400                 "oc_check_allowed type \"%s\"\n",
 401                 at->sat_cname.bv_val, 0, 0 );
 402 #endif
 403
 404         /* always allow objectClass attribute */
 405         if ( strcasecmp( at->sat_cname.bv_val, "objectClass" ) == 0 ) {
 406                 return LDAP_SUCCESS;
 407         }
 408
 409         /*
 410          * All operational attributions are allowed by schema rules.
 411          */
 412         if( is_at_operational(at) ) {
 413                 return LDAP_SUCCESS;
 414         }
 415
 416         /* check to see if its allowed by the structuralObjectClass */
 417         if( sc ) {
 418                 /* does it require the type? */
 419                 for ( j = 0; sc->soc_required != NULL &&
 420                         sc->soc_required[j] != NULL; j++ )
 421                 {
 422                         if( at == sc->soc_required[j] ) {
 423                                 return LDAP_SUCCESS;
 424                         }
 425                 }
 426
 427                 /* does it allow the type? */
 428                 for ( j = 0; sc->soc_allowed != NULL &&
 429                         sc->soc_allowed[j] != NULL; j++ )
 430                 {
 431                         if( at == sc->soc_allowed[j] ) {
 432                                 return LDAP_SUCCESS;
 433                         }
 434                 }
 435         }
 436
 437         /* check that the type appears as req or opt in at least one oc */
 438         for ( i = 0; ocl[i].bv_val != NULL; i++ ) {
 439                 /* if we know about the oc */
 440                 ObjectClass     *oc = oc_bvfind( &ocl[i] );
 441                 if ( oc != NULL && oc->soc_kind != LDAP_SCHEMA_ABSTRACT &&
 442                         ( sc == NULL || oc->soc_kind == LDAP_SCHEMA_AUXILIARY ))
 443                 {
 444                         /* does it require the type? */
 445                         for ( j = 0; oc->soc_required != NULL &&
 446                                 oc->soc_required[j] != NULL; j++ )
 447                         {
 448                                 if( at == oc->soc_required[j] ) {
 449                                         return LDAP_SUCCESS;
 450                                 }
 451                         }
 452                         /* does it allow the type? */
 453                         for ( j = 0; oc->soc_allowed != NULL &&
 454                                 oc->soc_allowed[j] != NULL; j++ )
 455                         {
 456                                 if( at == oc->soc_allowed[j] ) {
 457                                         return LDAP_SUCCESS;
 458                                 }
 459                         }
 460                 }
 461         }
 462
 463         /* not allowed by any oc */
 464         return LDAP_OBJECT_CLASS_VIOLATION;
 465 }
 466
 467 /*
 468  * Determine the structural object class from a set of OIDs
 469  */
 470 int structural_class(
 471         BerVarray ocs,
 472         struct berval *scbv,
 473         ObjectClass **scp,
 474         const char **text,
 475         char *textbuf, size_t textlen )
 476 {
 477         int i;
 478         ObjectClass *oc;
 479         ObjectClass *sc = NULL;
 480         int scn = -1;
 481
 482         *text = "structural_class: internal error";
 483         scbv->bv_len = 0;
 484
 485         for( i=0; ocs[i].bv_val; i++ ) {
 486                 oc = oc_bvfind( &ocs[i] );
 487
 488                 if( oc == NULL ) {
 489                         snprintf( textbuf, textlen,
 490                                 "unrecognized objectClass '%s'",
 491                                 ocs[i].bv_val );
 492                         *text = textbuf;
 493                         return LDAP_OBJECT_CLASS_VIOLATION;
 494                 }
 495
 496                 if( oc->soc_kind == LDAP_SCHEMA_STRUCTURAL ) {
 497                         if( sc == NULL || is_object_subclass( sc, oc ) ) {
 498                                 sc = oc;
 499                                 scn = i;
 500
 501                         } else if ( !is_object_subclass( oc, sc ) ) {
 502                                 int j;
 503                                 ObjectClass *xc = NULL;
 504
 505                                 /* find common superior */
 506                                 for( j=i+1; ocs[j].bv_val; j++ ) {
 507                                         xc = oc_bvfind( &ocs[j] );
 508
 509                                         if( xc == NULL ) {
 510                                                 snprintf( textbuf, textlen,
 511                                                         "unrecognized objectClass '%s'",
 512                                                         ocs[i].bv_val );
 513                                                 *text = textbuf;
 514                                                 return LDAP_OBJECT_CLASS_VIOLATION;
 515                                         }
 516
 517                                         if( xc->soc_kind != LDAP_SCHEMA_STRUCTURAL ) {
 518                                                 xc = NULL;
 519                                                 continue;
 520                                         }
 521
 522                                         if( is_object_subclass( sc, xc ) &&
 523                                                 is_object_subclass( oc, xc ) )
 524                                         {
 525                                                 /* found common subclass */
 526                                                 break;
 527                                         }
 528
 529                                         xc = NULL;
 530                                 }
 531
 532                                 if( xc == NULL ) {
 533                                         /* no common subclass */
 534                                         snprintf( textbuf, textlen,
 535                                                 "invalid structural object class chain (%s/%s)",
 536                                                 ocs[scn].bv_val, ocs[i].bv_val );
 537                                         *text = textbuf;
 538                                         return LDAP_OBJECT_CLASS_VIOLATION;
 539                                 }
 540                         }
 541                 }
 542         }
 543
 544         if( scp )
 545                 *scp = sc;
 546
 547         if( sc == NULL ) {
 548                 *text = "no structural object classes provided";
 549                 return LDAP_OBJECT_CLASS_VIOLATION;
 550         }
 551
 552         *scbv = ocs[scn];
 553         return LDAP_SUCCESS;
 554 }
 555
 556 /*
 557  * Return structural object class from list of modifications
 558  */
 559 int mods_structural_class(
 560         Modifications *mods,
 561         struct berval *sc,
 562         const char **text,
 563         char *textbuf, size_t textlen )
 564 {
 565         Modifications *ocmod = NULL;
 566
 567         for( ; mods != NULL; mods = mods->sml_next ) {
 568                 if( mods->sml_desc == slap_schema.si_ad_objectClass ) {
 569                         if( ocmod != NULL ) {
 570                                 *text = "entry has multiple objectClass attributes";
 571                                 return LDAP_OBJECT_CLASS_VIOLATION;
 572                         }
 573                         ocmod = mods;
 574                 }
 575         }
 576
 577         if( ocmod == NULL ) {
 578                 *text = "entry has no objectClass attribute";
 579                 return LDAP_OBJECT_CLASS_VIOLATION;
 580         }
 581
 582         if( ocmod->sml_bvalues == NULL || ocmod->sml_bvalues[0].bv_val == NULL ) {
 583                 *text = "objectClass attribute has no values";
 584                 return LDAP_OBJECT_CLASS_VIOLATION;
 585         }
 586
 587         return structural_class( ocmod->sml_bvalues, sc, NULL,
 588                 text, textbuf, textlen );
 589 }