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

   1 /* filterentry.c - apply a filter to an entry */
   2 /* $OpenLDAP$ */
   3 /*
   4  * Copyright 1998-2003 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/socket.h>
  13 #include <ac/string.h>
  14
  15
  16 #include "slap.h"
  17
  18 static int      test_filter_and( Operation *op, Entry *e, Filter *flist );
  19 static int      test_filter_or( Operation *op, Entry *e, Filter *flist );
  20 static int      test_substrings_filter( Operation *op, Entry *e, Filter *f);
  21 static int      test_ava_filter( Operation *op, Entry *e, AttributeAssertion *ava, int type );
  22 static int      test_mra_filter( Operation *op, Entry *e, MatchingRuleAssertion *mra );
  23 static int      test_presence_filter( Operation *op, Entry *e, AttributeDescription *desc );
  24
  25
  26 /*
  27  * test_filter - test a filter against a single entry.
  28  * returns:
  29  *              LDAP_COMPARE_TRUE               filter matched
  30  *              LDAP_COMPARE_FALSE              filter did not match
  31  *              SLAPD_COMPARE_UNDEFINED filter is undefined
  32  *      or an ldap result code indicating error
  33  */
  34
  35 int
  36 test_filter(
  37     Operation   *op,
  38     Entry       *e,
  39     Filter      *f
  40 )
  41 {
  42         int     rc;
  43 #ifdef NEW_LOGGING
  44         LDAP_LOG( FILTER, ENTRY, "test_filter: begin\n", 0, 0, 0 );
  45 #else
  46         Debug( LDAP_DEBUG_FILTER, "=> test_filter\n", 0, 0, 0 );
  47 #endif
  48
  49         switch ( f->f_choice ) {
  50         case SLAPD_FILTER_COMPUTED:
  51 #ifdef NEW_LOGGING
  52                 LDAP_LOG( FILTER, DETAIL1,
  53                         "test_filter:   COMPUTED %s (%d)\n",
  54                         f->f_result == LDAP_COMPARE_FALSE ? "false" :
  55                         f->f_result == LDAP_COMPARE_TRUE         ? "true"  :
  56                         f->f_result == SLAPD_COMPARE_UNDEFINED ? "undefined" :
  57                         "error", f->f_result, 0 );
  58 #else
  59                 Debug( LDAP_DEBUG_FILTER, "    COMPUTED %s (%d)\n",
  60                         f->f_result == LDAP_COMPARE_FALSE ? "false" :
  61                         f->f_result == LDAP_COMPARE_TRUE ? "true" :
  62                         f->f_result == SLAPD_COMPARE_UNDEFINED ? "undefined" : "error",
  63                         f->f_result, 0 );
  64 #endif
  65
  66                 rc = f->f_result;
  67                 break;
  68
  69         case LDAP_FILTER_EQUALITY:
  70 #ifdef NEW_LOGGING
  71                 LDAP_LOG( FILTER, DETAIL1, "test_filter:   EQUALITY\n", 0, 0, 0 );
  72 #else
  73                 Debug( LDAP_DEBUG_FILTER, "    EQUALITY\n", 0, 0, 0 );
  74 #endif
  75
  76                 rc = test_ava_filter( op, e, f->f_ava,
  77                     LDAP_FILTER_EQUALITY );
  78                 break;
  79
  80         case LDAP_FILTER_SUBSTRINGS:
  81 #ifdef NEW_LOGGING
  82                 LDAP_LOG( FILTER, DETAIL1, "test_filter  SUBSTRINGS\n", 0, 0, 0 );
  83 #else
  84                 Debug( LDAP_DEBUG_FILTER, "    SUBSTRINGS\n", 0, 0, 0 );
  85 #endif
  86
  87                 rc = test_substrings_filter( op, e, f );
  88                 break;
  89
  90         case LDAP_FILTER_GE:
  91                 rc = test_ava_filter( op, e, f->f_ava,
  92                     LDAP_FILTER_GE );
  93                 break;
  94
  95         case LDAP_FILTER_LE:
  96                 rc = test_ava_filter( op, e, f->f_ava,
  97                     LDAP_FILTER_LE );
  98                 break;
  99
 100         case LDAP_FILTER_PRESENT:
 101 #ifdef NEW_LOGGING
 102                 LDAP_LOG( FILTER, DETAIL1, "test_filter:        PRESENT\n", 0, 0, 0 );
 103 #else
 104                 Debug( LDAP_DEBUG_FILTER, "    PRESENT\n", 0, 0, 0 );
 105 #endif
 106
 107                 rc = test_presence_filter( op, e, f->f_desc );
 108                 break;
 109
 110         case LDAP_FILTER_APPROX:
 111 #ifdef NEW_LOGGING
 112                 LDAP_LOG( FILTER, DETAIL1, "test_filter: APPROX\n", 0, 0, 0 );
 113 #else
 114                 Debug( LDAP_DEBUG_FILTER, "    APPROX\n", 0, 0, 0 );
 115 #endif
 116                 rc = test_ava_filter( op, e, f->f_ava,
 117                     LDAP_FILTER_APPROX );
 118                 break;
 119
 120         case LDAP_FILTER_AND:
 121 #ifdef NEW_LOGGING
 122                 LDAP_LOG( FILTER, DETAIL1, "test_filter:  AND\n", 0, 0, 0 );
 123 #else
 124                 Debug( LDAP_DEBUG_FILTER, "    AND\n", 0, 0, 0 );
 125 #endif
 126
 127                 rc = test_filter_and( op, e, f->f_and );
 128                 break;
 129
 130         case LDAP_FILTER_OR:
 131 #ifdef NEW_LOGGING
 132                 LDAP_LOG( FILTER, DETAIL1, "test_filter:        OR\n", 0, 0, 0 );
 133 #else
 134                 Debug( LDAP_DEBUG_FILTER, "    OR\n", 0, 0, 0 );
 135 #endif
 136
 137                 rc = test_filter_or( op, e, f->f_or );
 138                 break;
 139
 140         case LDAP_FILTER_NOT:
 141 #ifdef NEW_LOGGING
 142                 LDAP_LOG( FILTER, DETAIL1, "test_filter:        NOT\n", 0, 0, 0 );
 143 #else
 144                 Debug( LDAP_DEBUG_FILTER, "    NOT\n", 0, 0, 0 );
 145 #endif
 146
 147                 rc = test_filter( op, e, f->f_not );
 148
 149                 /* Flip true to false and false to true
 150                  * but leave Undefined alone.
 151                  */
 152                 switch( rc ) {
 153                 case LDAP_COMPARE_TRUE:
 154                         rc = LDAP_COMPARE_FALSE;
 155                         break;
 156                 case LDAP_COMPARE_FALSE:
 157                         rc = LDAP_COMPARE_TRUE;
 158                         break;
 159                 }
 160                 break;
 161
 162         case LDAP_FILTER_EXT:
 163 #ifdef NEW_LOGGING
 164                 LDAP_LOG( FILTER, DETAIL1, "test_filter:        EXT\n", 0, 0, 0 );
 165 #else
 166                 Debug( LDAP_DEBUG_FILTER, "    EXT\n", 0, 0, 0 );
 167 #endif
 168
 169                 rc = test_mra_filter( op, e, f->f_mra );
 170                 break;
 171
 172         default:
 173 #ifdef NEW_LOGGING
 174                 LDAP_LOG( FILTER, INFO,
 175                         "test_filter:  unknown filter type %lu\n", f->f_choice, 0, 0 );
 176 #else
 177                 Debug( LDAP_DEBUG_ANY, "    unknown filter type %lu\n",
 178                     f->f_choice, 0, 0 );
 179 #endif
 180
 181                 rc = LDAP_PROTOCOL_ERROR;
 182         }
 183
 184 #ifdef NEW_LOGGING
 185         LDAP_LOG( FILTER, RESULTS, "test_filter:  return=%d\n", rc, 0, 0 );
 186 #else
 187         Debug( LDAP_DEBUG_FILTER, "<= test_filter %d\n", rc, 0, 0 );
 188 #endif
 189
 190         return( rc );
 191 }
 192
 193 static int test_mra_filter(
 194         Operation *op,
 195         Entry *e,
 196         MatchingRuleAssertion *mra )
 197 {
 198         Attribute       *a;
 199
 200         if ( mra->ma_desc ) {
 201                 /*
 202                  * if ma_desc is available, then we're filtering for
 203                  * one attribute, and SEARCH permissions can be checked
 204                  * directly.
 205                  */
 206                 if( !access_allowed( op, e,
 207                         mra->ma_desc, &mra->ma_value, ACL_SEARCH, NULL ) )
 208                 {
 209                         return LDAP_INSUFFICIENT_ACCESS;
 210                 }
 211
 212                 for(a = attrs_find( e->e_attrs, mra->ma_desc );
 213                         a != NULL;
 214                         a = attrs_find( a->a_next, mra->ma_desc ) )
 215                 {
 216                         struct berval *bv;
 217                         /* If ma_rule is not the same as the attribute's
 218                          * normal rule, then we can't use the a_nvals.
 219                          */
 220                         if (mra->ma_rule == a->a_desc->ad_type->sat_equality)
 221                                 bv = a->a_nvals;
 222                         else
 223                                 bv = a->a_vals;
 224                         for ( ; bv->bv_val != NULL; bv++ )
 225                         {
 226                                 int ret;
 227                                 int rc;
 228                                 const char *text;
 229
 230                                 rc = value_match( &ret, a->a_desc, mra->ma_rule, 0,
 231                                         bv, &mra->ma_value, &text );
 232
 233                                 if( rc != LDAP_SUCCESS ) {
 234                                         return rc;
 235                                 }
 236
 237                                 if ( ret == 0 ) {
 238                                         return LDAP_COMPARE_TRUE;
 239                                 }
 240                         }
 241                 }
 242         } else {
 243
 244                 /*
 245                  * No attribute description: test all
 246                  */
 247                 for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
 248                         struct berval   *bv, value;
 249                         const char      *text = NULL;
 250                         int             rc;
 251
 252                         /* check if matching is appropriate */
 253                         if ( !mr_usable_with_at( mra->ma_rule, a->a_desc->ad_type )) {
 254                                 continue;
 255                         }
 256
 257                         /* normalize for equality */
 258                         rc = asserted_value_validate_normalize( a->a_desc, mra->ma_rule,
 259                                 SLAP_MR_EXT|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
 260                                 &mra->ma_value, &value, &text, op->o_tmpmemctx );
 261                         if ( rc != LDAP_SUCCESS ) {
 262                                 continue;
 263                         }
 264
 265                         /* check search access */
 266                         if ( !access_allowed( op, e,
 267                                 a->a_desc, &value, ACL_SEARCH, NULL ) ) {
 268                                 continue;
 269                         }
 270
 271                         /* check match */
 272                         if (mra->ma_rule == a->a_desc->ad_type->sat_equality)
 273                                 bv = a->a_nvals;
 274                         else
 275                                 bv = a->a_vals;
 276                         for ( ; bv->bv_val != NULL; bv++ )
 277                         {
 278                                 int ret;
 279                                 int rc;
 280
 281                                 rc = value_match( &ret, a->a_desc, mra->ma_rule, 0,
 282                                         bv, &value, &text );
 283
 284                                 if( rc != LDAP_SUCCESS ) {
 285                                         return rc;
 286                                 }
 287
 288                                 if ( ret == 0 ) {
 289                                         return LDAP_COMPARE_TRUE;
 290                                 }
 291                         }
 292                 }
 293         }
 294
 295         /* check attrs in DN AVAs if required */
 296         if ( mra->ma_dnattrs ) {
 297                 LDAPDN          dn = NULL;
 298                 int             iRDN, iAVA;
 299                 int             rc;
 300
 301                 /* parse and pretty the dn */
 302                 rc = dnPrettyDN( NULL, &e->e_name, &dn, op->o_tmpmemctx );
 303                 if ( rc != LDAP_SUCCESS ) {
 304                         return LDAP_INVALID_SYNTAX;
 305                 }
 306
 307                 /* for each AVA of each RDN ... */
 308                 for ( iRDN = 0; dn[ iRDN ]; iRDN++ ) {
 309                         LDAPRDN         rdn = dn[ iRDN ];
 310
 311                         for ( iAVA = 0; rdn[ iAVA ]; iAVA++ ) {
 312                                 LDAPAVA         *ava = rdn[ iAVA ];
 313                                 struct berval   *bv = &ava->la_value, value;
 314                                 AttributeDescription *ad = (AttributeDescription *)ava->la_private;
 315                                 int ret;
 316                                 int rc;
 317                                 const char *text;
 318
 319                                 assert( ad );
 320
 321                                 if ( mra->ma_desc ) {
 322                                         /* have a mra type? check for subtype */
 323                                         if ( !is_ad_subtype( ad, mra->ma_desc ) ) {
 324                                                 continue;
 325                                         }
 326                                         value = mra->ma_value;
 327
 328                                 } else {
 329                                         const char      *text = NULL;
 330
 331                                         /* check if matching is appropriate */
 332                                         if ( !mr_usable_with_at( mra->ma_rule, ad->ad_type )) {
 333                                                 continue;
 334                                         }
 335
 336                                         /* normalize for equality */
 337                                         rc = asserted_value_validate_normalize( ad,
 338                                                 mra->ma_rule,
 339                                                 SLAP_MR_EXT|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
 340                                                 &mra->ma_value, &value, &text, op->o_tmpmemctx );
 341                                         if ( rc != LDAP_SUCCESS ) {
 342                                                 continue;
 343                                         }
 344
 345                                         /* check search access */
 346                                         if ( !access_allowed( op, e,
 347                                                 ad, &value, ACL_SEARCH, NULL ) ) {
 348                                                 continue;
 349                                         }
 350                                 }
 351
 352                                 /* check match */
 353                                 rc = value_match( &ret, ad, mra->ma_rule, 0,
 354                                         bv, &value, &text );
 355
 356                                 if( rc != LDAP_SUCCESS ) {
 357                                         ldap_dnfree_x( dn, op->o_tmpmemctx );
 358                                         return rc;
 359                                 }
 360
 361                                 if ( ret == 0 ) {
 362                                         ldap_dnfree_x( dn, op->o_tmpmemctx );
 363                                         return LDAP_COMPARE_TRUE;
 364                                 }
 365                         }
 366                 }
 367         }
 368
 369         return LDAP_COMPARE_FALSE;
 370 }
 371
 372 static int
 373 test_ava_filter(
 374         Operation       *op,
 375         Entry           *e,
 376         AttributeAssertion *ava,
 377         int             type
 378 )
 379 {
 380         Attribute       *a;
 381
 382         if ( !access_allowed( op, e,
 383                 ava->aa_desc, &ava->aa_value, ACL_SEARCH, NULL ) )
 384         {
 385                 return LDAP_INSUFFICIENT_ACCESS;
 386         }
 387
 388         for(a = attrs_find( e->e_attrs, ava->aa_desc );
 389                 a != NULL;
 390                 a = attrs_find( a->a_next, ava->aa_desc ) )
 391         {
 392                 MatchingRule *mr;
 393                 struct berval *bv;
 394
 395                 switch ( type ) {
 396                 case LDAP_FILTER_APPROX:
 397                         mr = a->a_desc->ad_type->sat_approx;
 398                         if( mr != NULL ) break;
 399
 400                         /* use EQUALITY matching rule if no APPROX rule */
 401
 402                 case LDAP_FILTER_EQUALITY:
 403                         mr = a->a_desc->ad_type->sat_equality;
 404                         break;
 405
 406                 case LDAP_FILTER_GE:
 407                 case LDAP_FILTER_LE:
 408                         mr = a->a_desc->ad_type->sat_ordering;
 409                         break;
 410
 411                 default:
 412                         mr = NULL;
 413                 }
 414
 415                 if( mr == NULL ) {
 416                         continue;
 417                 }
 418
 419                 for ( bv = a->a_nvals; bv->bv_val != NULL; bv++ )
 420                 {
 421                         int ret;
 422                         int rc;
 423                         const char *text;
 424
 425                         rc = value_match( &ret, a->a_desc, mr, 0,
 426                                 bv, &ava->aa_value, &text );
 427
 428                         if( rc != LDAP_SUCCESS ) {
 429                                 return rc;
 430                         }
 431
 432                         switch ( type ) {
 433                         case LDAP_FILTER_EQUALITY:
 434                         case LDAP_FILTER_APPROX:
 435                                 if ( ret == 0 ) {
 436                                         return LDAP_COMPARE_TRUE;
 437                                 }
 438                                 break;
 439
 440                         case LDAP_FILTER_GE:
 441                                 if ( ret >= 0 ) {
 442                                         return LDAP_COMPARE_TRUE;
 443                                 }
 444                                 break;
 445
 446                         case LDAP_FILTER_LE:
 447                                 if ( ret <= 0 ) {
 448                                         return LDAP_COMPARE_TRUE;
 449                                 }
 450                                 break;
 451                         }
 452                 }
 453         }
 454
 455         if ( ava->aa_desc == slap_schema.si_ad_hasSubordinates
 456                         && op->o_bd && op->o_bd->be_has_subordinates ) {
 457                 int             hasSubordinates;
 458                 struct berval   hs;
 459
 460                 /*
 461                  * No other match should be allowed ...
 462                  */
 463                 assert( type == LDAP_FILTER_EQUALITY );
 464
 465                 if (op->o_bd->be_has_subordinates( op, e, &hasSubordinates ) != LDAP_SUCCESS) {
 466                         return LDAP_OTHER;
 467                 }
 468
 469                 if ( hasSubordinates == LDAP_COMPARE_TRUE ) {
 470                         hs = slap_true_bv;
 471
 472                 } else if ( hasSubordinates == LDAP_COMPARE_FALSE ) {
 473                         hs = slap_false_bv;
 474
 475                 } else {
 476                         return LDAP_OTHER;
 477                 }
 478
 479                 if ( bvmatch( &ava->aa_value, &hs ) ) {
 480                         return LDAP_COMPARE_TRUE;
 481                 }
 482
 483                 return LDAP_COMPARE_FALSE;
 484         }
 485
 486         return( LDAP_COMPARE_FALSE );
 487 }
 488
 489
 490 static int
 491 test_presence_filter(
 492         Operation       *op,
 493         Entry           *e,
 494         AttributeDescription *desc
 495 )
 496 {
 497         Attribute       *a;
 498
 499         if ( !access_allowed( op, e, desc, NULL, ACL_SEARCH, NULL ) )
 500         {
 501                 return LDAP_INSUFFICIENT_ACCESS;
 502         }
 503
 504         a = attrs_find( e->e_attrs, desc );
 505
 506         if ( a == NULL && desc == slap_schema.si_ad_hasSubordinates ) {
 507
 508                 /*
 509                  * XXX: fairly optimistic: if the function is defined,
 510                  * then PRESENCE must succeed, because hasSubordinate
 511                  * is boolean-valued; I think we may live with this
 512                  * simplification by now
 513                  */
 514                 if ( op->o_bd && op->o_bd->be_has_subordinates ) {
 515                         return LDAP_COMPARE_TRUE;
 516                 }
 517
 518                 return LDAP_COMPARE_FALSE;
 519         }
 520
 521         return a != NULL ? LDAP_COMPARE_TRUE : LDAP_COMPARE_FALSE;
 522 }
 523
 524
 525 static int
 526 test_filter_and(
 527         Operation       *op,
 528         Entry   *e,
 529         Filter  *flist
 530 )
 531 {
 532         Filter  *f;
 533         int rtn = LDAP_COMPARE_TRUE; /* True if empty */
 534
 535 #ifdef NEW_LOGGING
 536         LDAP_LOG( FILTER, ENTRY, "test_filter_and: begin\n", 0, 0, 0 );
 537 #else
 538         Debug( LDAP_DEBUG_FILTER, "=> test_filter_and\n", 0, 0, 0 );
 539 #endif
 540
 541
 542         for ( f = flist; f != NULL; f = f->f_next ) {
 543                 int rc = test_filter( op, e, f );
 544
 545                 if ( rc == LDAP_COMPARE_FALSE ) {
 546                         /* filter is False */
 547                         rtn = rc;
 548                         break;
 549                 }
 550
 551                 if ( rc != LDAP_COMPARE_TRUE ) {
 552                         /* filter is Undefined unless later elements are False */
 553                         rtn = rc;
 554                 }
 555         }
 556
 557 #ifdef NEW_LOGGING
 558         LDAP_LOG( FILTER, RESULTS, "test_filter_and:  rc=%d\n", rtn, 0, 0 );
 559 #else
 560         Debug( LDAP_DEBUG_FILTER, "<= test_filter_and %d\n", rtn, 0, 0 );
 561 #endif
 562
 563         return rtn;
 564 }
 565
 566 static int
 567 test_filter_or(
 568         Operation       *op,
 569         Entry   *e,
 570         Filter  *flist
 571 )
 572 {
 573         Filter  *f;
 574         int rtn = LDAP_COMPARE_FALSE; /* False if empty */
 575
 576 #ifdef NEW_LOGGING
 577         LDAP_LOG( FILTER, ENTRY, "test_filter_or: begin\n", 0, 0, 0 );
 578 #else
 579         Debug( LDAP_DEBUG_FILTER, "=> test_filter_or\n", 0, 0, 0 );
 580 #endif
 581
 582
 583         for ( f = flist; f != NULL; f = f->f_next ) {
 584                 int rc = test_filter( op, e, f );
 585
 586                 if ( rc == LDAP_COMPARE_TRUE ) {
 587                         /* filter is True */
 588                         rtn = rc;
 589                         break;
 590                 }
 591
 592                 if ( rc != LDAP_COMPARE_FALSE ) {
 593                         /* filter is Undefined unless later elements are True */
 594                         rtn = rc;
 595                 }
 596         }
 597
 598 #ifdef NEW_LOGGING
 599         LDAP_LOG( FILTER, ENTRY, "test_filter_or: result=%d\n", rtn, 0, 0 );
 600 #else
 601         Debug( LDAP_DEBUG_FILTER, "<= test_filter_or %d\n", rtn, 0, 0 );
 602 #endif
 603
 604         return rtn;
 605 }
 606
 607
 608 static int
 609 test_substrings_filter(
 610         Operation       *op,
 611         Entry   *e,
 612         Filter  *f
 613 )
 614 {
 615         Attribute       *a;
 616
 617 #ifdef NEW_LOGGING
 618         LDAP_LOG( FILTER, ENTRY, "test_substrings_filter: begin\n", 0, 0, 0 );
 619 #else
 620         Debug( LDAP_DEBUG_FILTER, "begin test_substrings_filter\n", 0, 0, 0 );
 621 #endif
 622
 623
 624         if ( !access_allowed( op, e,
 625                 f->f_sub_desc, NULL, ACL_SEARCH, NULL ) )
 626         {
 627                 return LDAP_INSUFFICIENT_ACCESS;
 628         }
 629
 630         for(a = attrs_find( e->e_attrs, f->f_sub_desc );
 631                 a != NULL;
 632                 a = attrs_find( a->a_next, f->f_sub_desc ) )
 633         {
 634                 MatchingRule *mr = a->a_desc->ad_type->sat_substr;
 635                 struct berval *bv;
 636
 637                 if( mr == NULL ) {
 638                         continue;
 639                 }
 640
 641                 for ( bv = a->a_nvals; bv->bv_val != NULL; bv++ )
 642                 {
 643                         int ret;
 644                         int rc;
 645                         const char *text;
 646
 647                         rc = value_match( &ret, a->a_desc, mr, 0,
 648                                 bv, f->f_sub, &text );
 649
 650                         if( rc != LDAP_SUCCESS ) {
 651                                 return rc;
 652                         }
 653
 654                         if ( ret == 0 ) {
 655                                 return LDAP_COMPARE_TRUE;
 656                         }
 657                 }
 658         }
 659
 660 #ifdef NEW_LOGGING
 661         LDAP_LOG( FILTER, ENTRY, "test_substrings_filter: return FALSE\n", 0, 0, 0 );
 662 #else
 663         Debug( LDAP_DEBUG_FILTER, "end test_substrings_filter 1\n", 0, 0, 0 );
 664 #endif
 665
 666         return LDAP_COMPARE_FALSE;
 667 }