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[openldap] / servers / slapd / filterentry.c
1 /* filterentry.c - apply a filter to an entry */
2 /* $OpenLDAP$ */
3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4  *
5  * Copyright 1998-2004 The OpenLDAP Foundation.
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted only as authorized by the OpenLDAP
10  * Public License.
11  *
12  * A copy of this license is available in the file LICENSE in the
13  * top-level directory of the distribution or, alternatively, at
14  * <http://www.OpenLDAP.org/license.html>.
15  */
16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
17  * All rights reserved.
18  *
19  * Redistribution and use in source and binary forms are permitted
20  * provided that this notice is preserved and that due credit is given
21  * to the University of Michigan at Ann Arbor. The name of the University
22  * may not be used to endorse or promote products derived from this
23  * software without specific prior written permission. This software
24  * is provided ``as is'' without express or implied warranty.
25  */
26
27 #include "portable.h"
28
29 #include <stdio.h>
30
31 #include <ac/socket.h>
32 #include <ac/string.h>
33
34
35 #include "slap.h"
36
37 static int      test_filter_and( Operation *op, Entry *e, Filter *flist );
38 static int      test_filter_or( Operation *op, Entry *e, Filter *flist );
39 static int      test_substrings_filter( Operation *op, Entry *e, Filter *f);
40 static int      test_ava_filter( Operation *op, Entry *e, AttributeAssertion *ava, int type );
41 static int      test_mra_filter( Operation *op, Entry *e, MatchingRuleAssertion *mra );
42 static int      test_presence_filter( Operation *op, Entry *e, AttributeDescription *desc );
43
44
45 /*
46  * test_filter - test a filter against a single entry.
47  * returns:
48  *              LDAP_COMPARE_TRUE               filter matched
49  *              LDAP_COMPARE_FALSE              filter did not match
50  *              SLAPD_COMPARE_UNDEFINED filter is undefined
51  *      or an ldap result code indicating error
52  */
53
54 int
55 test_filter(
56     Operation   *op,
57     Entry       *e,
58     Filter      *f
59 )
60 {
61         int     rc;
62 #ifdef NEW_LOGGING
63         LDAP_LOG( FILTER, ENTRY, "test_filter: begin\n", 0, 0, 0 );
64 #else
65         Debug( LDAP_DEBUG_FILTER, "=> test_filter\n", 0, 0, 0 );
66 #endif
67
68         switch ( f->f_choice ) {
69         case SLAPD_FILTER_COMPUTED:
70 #ifdef NEW_LOGGING
71                 LDAP_LOG( FILTER, DETAIL1,
72                         "test_filter:   COMPUTED %s (%d)\n",
73                         f->f_result == LDAP_COMPARE_FALSE ? "false" :
74                         f->f_result == LDAP_COMPARE_TRUE         ? "true"  :
75                         f->f_result == SLAPD_COMPARE_UNDEFINED ? "undefined" :
76                         "error", f->f_result, 0 );
77 #else
78                 Debug( LDAP_DEBUG_FILTER, "    COMPUTED %s (%d)\n",
79                         f->f_result == LDAP_COMPARE_FALSE ? "false" :
80                         f->f_result == LDAP_COMPARE_TRUE ? "true" :
81                         f->f_result == SLAPD_COMPARE_UNDEFINED ? "undefined" : "error",
82                         f->f_result, 0 );
83 #endif
84
85                 rc = f->f_result;
86                 break;
87
88         case LDAP_FILTER_EQUALITY:
89 #ifdef NEW_LOGGING
90                 LDAP_LOG( FILTER, DETAIL1, "test_filter:   EQUALITY\n", 0, 0, 0 );
91 #else
92                 Debug( LDAP_DEBUG_FILTER, "    EQUALITY\n", 0, 0, 0 );
93 #endif
94
95                 rc = test_ava_filter( op, e, f->f_ava,
96                     LDAP_FILTER_EQUALITY );
97                 break;
98
99         case LDAP_FILTER_SUBSTRINGS:
100 #ifdef NEW_LOGGING
101                 LDAP_LOG( FILTER, DETAIL1, "test_filter  SUBSTRINGS\n", 0, 0, 0 );
102 #else
103                 Debug( LDAP_DEBUG_FILTER, "    SUBSTRINGS\n", 0, 0, 0 );
104 #endif
105
106                 rc = test_substrings_filter( op, e, f );
107                 break;
108
109         case LDAP_FILTER_GE:
110                 rc = test_ava_filter( op, e, f->f_ava,
111                     LDAP_FILTER_GE );
112                 break;
113
114         case LDAP_FILTER_LE:
115                 rc = test_ava_filter( op, e, f->f_ava,
116                     LDAP_FILTER_LE );
117                 break;
118
119         case LDAP_FILTER_PRESENT:
120 #ifdef NEW_LOGGING
121                 LDAP_LOG( FILTER, DETAIL1, "test_filter:        PRESENT\n", 0, 0, 0 );
122 #else
123                 Debug( LDAP_DEBUG_FILTER, "    PRESENT\n", 0, 0, 0 );
124 #endif
125
126                 rc = test_presence_filter( op, e, f->f_desc );
127                 break;
128
129         case LDAP_FILTER_APPROX:
130 #ifdef NEW_LOGGING
131                 LDAP_LOG( FILTER, DETAIL1, "test_filter: APPROX\n", 0, 0, 0 );
132 #else
133                 Debug( LDAP_DEBUG_FILTER, "    APPROX\n", 0, 0, 0 );
134 #endif
135                 rc = test_ava_filter( op, e, f->f_ava,
136                     LDAP_FILTER_APPROX );
137                 break;
138
139         case LDAP_FILTER_AND:
140 #ifdef NEW_LOGGING
141                 LDAP_LOG( FILTER, DETAIL1, "test_filter:  AND\n", 0, 0, 0 );
142 #else
143                 Debug( LDAP_DEBUG_FILTER, "    AND\n", 0, 0, 0 );
144 #endif
145
146                 rc = test_filter_and( op, e, f->f_and );
147                 break;
148
149         case LDAP_FILTER_OR:
150 #ifdef NEW_LOGGING
151                 LDAP_LOG( FILTER, DETAIL1, "test_filter:        OR\n", 0, 0, 0 );
152 #else
153                 Debug( LDAP_DEBUG_FILTER, "    OR\n", 0, 0, 0 );
154 #endif
155
156                 rc = test_filter_or( op, e, f->f_or );
157                 break;
158
159         case LDAP_FILTER_NOT:
160 #ifdef NEW_LOGGING
161                 LDAP_LOG( FILTER, DETAIL1, "test_filter:        NOT\n", 0, 0, 0 );
162 #else
163                 Debug( LDAP_DEBUG_FILTER, "    NOT\n", 0, 0, 0 );
164 #endif
165
166                 rc = test_filter( op, e, f->f_not );
167
168                 /* Flip true to false and false to true
169                  * but leave Undefined alone.
170                  */
171                 switch( rc ) {
172                 case LDAP_COMPARE_TRUE:
173                         rc = LDAP_COMPARE_FALSE;
174                         break;
175                 case LDAP_COMPARE_FALSE:
176                         rc = LDAP_COMPARE_TRUE;
177                         break;
178                 }
179                 break;
180
181         case LDAP_FILTER_EXT:
182 #ifdef NEW_LOGGING
183                 LDAP_LOG( FILTER, DETAIL1, "test_filter:        EXT\n", 0, 0, 0 );
184 #else
185                 Debug( LDAP_DEBUG_FILTER, "    EXT\n", 0, 0, 0 );
186 #endif
187
188                 rc = test_mra_filter( op, e, f->f_mra );
189                 break;
190
191         default:
192 #ifdef NEW_LOGGING
193                 LDAP_LOG( FILTER, INFO, 
194                         "test_filter:  unknown filter type %lu\n", f->f_choice, 0, 0 );
195 #else
196                 Debug( LDAP_DEBUG_ANY, "    unknown filter type %lu\n",
197                     f->f_choice, 0, 0 );
198 #endif
199
200                 rc = LDAP_PROTOCOL_ERROR;
201         }
202
203 #ifdef NEW_LOGGING
204         LDAP_LOG( FILTER, RESULTS, "test_filter:  return=%d\n", rc, 0, 0 );
205 #else
206         Debug( LDAP_DEBUG_FILTER, "<= test_filter %d\n", rc, 0, 0 );
207 #endif
208
209         return( rc );
210 }
211
212 static int test_mra_filter(
213         Operation *op,
214         Entry *e,
215         MatchingRuleAssertion *mra )
216 {
217         Attribute       *a;
218         void *memctx = op ? op->o_tmpmemctx : NULL;
219
220         if ( mra->ma_desc ) {
221                 /*
222                  * if ma_desc is available, then we're filtering for
223                  * one attribute, and SEARCH permissions can be checked
224                  * directly.
225                  */
226                 if( !access_allowed( op, e,
227                         mra->ma_desc, &mra->ma_value, ACL_SEARCH, NULL ) )
228                 {
229                         return LDAP_INSUFFICIENT_ACCESS;
230                 }
231
232                 for(a = attrs_find( e->e_attrs, mra->ma_desc );
233                         a != NULL;
234                         a = attrs_find( a->a_next, mra->ma_desc ) )
235                 {
236                         struct berval *bv;
237                         /* If ma_rule is not the same as the attribute's
238                          * normal rule, then we can't use the a_nvals.
239                          */
240                         if (mra->ma_rule == a->a_desc->ad_type->sat_equality) {
241                                 bv = a->a_nvals;
242                         } else {
243                                 bv = a->a_vals;
244                         }
245
246                         for ( ; bv->bv_val != NULL; bv++ ) {
247                                 int ret;
248                                 int rc;
249                                 const char *text;
250         
251                                 rc = value_match( &ret, a->a_desc, mra->ma_rule, 0,
252                                         bv, &mra->ma_value, &text );
253         
254                                 if( rc != LDAP_SUCCESS ) {
255                                         return rc;
256                                 }
257         
258                                 if ( ret == 0 ) {
259                                         return LDAP_COMPARE_TRUE;
260                                 }
261                         }
262                 }
263         } else {
264
265                 /*
266                  * No attribute description: test all
267                  */
268                 for ( a = e->e_attrs; a != NULL; a = a->a_next ) {
269                         struct berval   *bv, value;
270                         const char      *text = NULL;
271                         int             rc;
272
273                         /* check if matching is appropriate */
274                         if ( !mr_usable_with_at( mra->ma_rule, a->a_desc->ad_type )) {
275                                 continue;
276                         }
277
278                         /* normalize for equality */
279                         rc = asserted_value_validate_normalize( a->a_desc, mra->ma_rule,
280                                 SLAP_MR_EXT|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
281                                 &mra->ma_value, &value, &text, memctx );
282                         if ( rc != LDAP_SUCCESS ) {
283                                 continue;
284                         }
285
286                         /* check search access */
287                         if ( !access_allowed( op, e,
288                                 a->a_desc, &value, ACL_SEARCH, NULL ) ) {
289                                 continue;
290                         }
291
292                         /* check match */
293                         if (mra->ma_rule == a->a_desc->ad_type->sat_equality)
294                                 bv = a->a_nvals;
295                         else
296                                 bv = a->a_vals;
297                         for ( ; bv->bv_val != NULL; bv++ )
298                         {
299                                 int ret;
300                                 int rc;
301         
302                                 rc = value_match( &ret, a->a_desc, mra->ma_rule, 0,
303                                         bv, &value, &text );
304         
305                                 if( rc != LDAP_SUCCESS ) {
306                                         return rc;
307                                 }
308         
309                                 if ( ret == 0 ) {
310                                         return LDAP_COMPARE_TRUE;
311                                 }
312                         }
313                 }
314         }
315
316         /* check attrs in DN AVAs if required */
317         if ( mra->ma_dnattrs ) {
318                 LDAPDN          dn = NULL;
319                 int             iRDN, iAVA;
320                 int             rc;
321
322                 /* parse and pretty the dn */
323                 rc = dnPrettyDN( NULL, &e->e_name, &dn, memctx );
324                 if ( rc != LDAP_SUCCESS ) {
325                         return LDAP_INVALID_SYNTAX;
326                 }
327
328                 /* for each AVA of each RDN ... */
329                 for ( iRDN = 0; dn[ iRDN ]; iRDN++ ) {
330                         LDAPRDN         rdn = dn[ iRDN ];
331
332                         for ( iAVA = 0; rdn[ iAVA ]; iAVA++ ) {
333                                 LDAPAVA         *ava = rdn[ iAVA ];
334                                 struct berval   *bv = &ava->la_value, value;
335                                 AttributeDescription *ad = (AttributeDescription *)ava->la_private;
336                                 int ret;
337                                 int rc;
338                                 const char *text;
339
340                                 assert( ad );
341
342                                 if ( mra->ma_desc ) {
343                                         /* have a mra type? check for subtype */
344                                         if ( !is_ad_subtype( ad, mra->ma_desc ) ) {
345                                                 continue;
346                                         }
347                                         value = mra->ma_value;
348
349                                 } else {
350                                         const char      *text = NULL;
351
352                                         /* check if matching is appropriate */
353                                         if ( !mr_usable_with_at( mra->ma_rule, ad->ad_type )) {
354                                                 continue;
355                                         }
356
357                                         /* normalize for equality */
358                                         rc = asserted_value_validate_normalize( ad,
359                                                 mra->ma_rule,
360                                                 SLAP_MR_EXT|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
361                                                 &mra->ma_value, &value, &text, memctx );
362                                         if ( rc != LDAP_SUCCESS ) {
363                                                 continue;
364                                         }
365
366                                         /* check search access */
367                                         if ( !access_allowed( op, e,
368                                                 ad, &value, ACL_SEARCH, NULL ) ) {
369                                                 continue;
370                                         }
371                                 }
372
373                                 /* check match */
374                                 rc = value_match( &ret, ad, mra->ma_rule, 0,
375                                         bv, &value, &text );
376
377                                 if( rc != LDAP_SUCCESS ) {
378                                         ldap_dnfree_x( dn, memctx );
379                                         return rc;
380                                 }
381
382                                 if ( ret == 0 ) {
383                                         ldap_dnfree_x( dn, memctx );
384                                         return LDAP_COMPARE_TRUE;
385                                 }
386                         }
387                 }
388         }
389
390         return LDAP_COMPARE_FALSE;
391 }
392
393 static int
394 test_ava_filter(
395         Operation       *op,
396         Entry           *e,
397         AttributeAssertion *ava,
398         int             type
399 )
400 {
401         Attribute       *a;
402
403         if ( !access_allowed( op, e,
404                 ava->aa_desc, &ava->aa_value, ACL_SEARCH, NULL ) )
405         {
406                 return LDAP_INSUFFICIENT_ACCESS;
407         }
408
409         for(a = attrs_find( e->e_attrs, ava->aa_desc );
410                 a != NULL;
411                 a = attrs_find( a->a_next, ava->aa_desc ) )
412         {
413                 MatchingRule *mr;
414                 struct berval *bv;
415
416                 switch ( type ) {
417                 case LDAP_FILTER_APPROX:
418                         mr = a->a_desc->ad_type->sat_approx;
419                         if( mr != NULL ) break;
420
421                         /* use EQUALITY matching rule if no APPROX rule */
422
423                 case LDAP_FILTER_EQUALITY:
424                         mr = a->a_desc->ad_type->sat_equality;
425                         break;
426
427                 case LDAP_FILTER_GE:
428                 case LDAP_FILTER_LE:
429                         mr = a->a_desc->ad_type->sat_ordering;
430                         break;
431
432                 default:
433                         mr = NULL;
434                 }
435
436                 if( mr == NULL ) {
437                         continue;
438                 }
439
440                 for ( bv = a->a_nvals; bv->bv_val != NULL; bv++ )
441                 {
442                         int ret;
443                         int rc;
444                         const char *text;
445
446                         rc = value_match( &ret, a->a_desc, mr, 0,
447                                 bv, &ava->aa_value, &text );
448
449                         if( rc != LDAP_SUCCESS ) {
450                                 return rc;
451                         }
452
453                         switch ( type ) {
454                         case LDAP_FILTER_EQUALITY:
455                         case LDAP_FILTER_APPROX:
456                                 if ( ret == 0 ) {
457                                         return LDAP_COMPARE_TRUE;
458                                 }
459                                 break;
460
461                         case LDAP_FILTER_GE:
462                                 if ( ret >= 0 ) {
463                                         return LDAP_COMPARE_TRUE;
464                                 }
465                                 break;
466
467                         case LDAP_FILTER_LE:
468                                 if ( ret <= 0 ) {
469                                         return LDAP_COMPARE_TRUE;
470                                 }
471                                 break;
472                         }
473                 }
474         }
475
476         if ( ava->aa_desc == slap_schema.si_ad_hasSubordinates 
477                         && op && op->o_bd && op->o_bd->be_has_subordinates ) {
478                 int             hasSubordinates;
479                 struct berval   hs;
480
481                 /*
482                  * No other match should be allowed ...
483                  */
484                 assert( type == LDAP_FILTER_EQUALITY );
485                 
486                 if (op->o_bd->be_has_subordinates( op, e, &hasSubordinates ) != LDAP_SUCCESS) {
487                         return LDAP_OTHER;
488                 }
489
490                 if ( hasSubordinates == LDAP_COMPARE_TRUE ) {
491                         hs = slap_true_bv;
492
493                 } else if ( hasSubordinates == LDAP_COMPARE_FALSE ) {
494                         hs = slap_false_bv;
495
496                 } else {
497                         return LDAP_OTHER;
498                 }
499
500                 if ( bvmatch( &ava->aa_value, &hs ) ) {
501                         return LDAP_COMPARE_TRUE;
502                 }
503
504                 return LDAP_COMPARE_FALSE;
505         }
506
507         return( LDAP_COMPARE_FALSE );
508 }
509
510
511 static int
512 test_presence_filter(
513         Operation       *op,
514         Entry           *e,
515         AttributeDescription *desc
516 )
517 {
518         Attribute       *a;
519
520         if ( !access_allowed( op, e, desc, NULL, ACL_SEARCH, NULL ) )
521         {
522                 return LDAP_INSUFFICIENT_ACCESS;
523         }
524
525         a = attrs_find( e->e_attrs, desc );
526
527         if ( a == NULL && desc == slap_schema.si_ad_hasSubordinates ) {
528
529                 /*
530                  * XXX: fairly optimistic: if the function is defined,
531                  * then PRESENCE must succeed, because hasSubordinate
532                  * is boolean-valued; I think we may live with this 
533                  * simplification by now
534                  */
535                 if ( op && op->o_bd && op->o_bd->be_has_subordinates ) {
536                         return LDAP_COMPARE_TRUE;
537                 }
538
539                 return LDAP_COMPARE_FALSE;
540         }
541
542         return a != NULL ? LDAP_COMPARE_TRUE : LDAP_COMPARE_FALSE;
543 }
544
545
546 static int
547 test_filter_and(
548         Operation       *op,
549         Entry   *e,
550         Filter  *flist
551 )
552 {
553         Filter  *f;
554         int rtn = LDAP_COMPARE_TRUE; /* True if empty */
555
556 #ifdef NEW_LOGGING
557         LDAP_LOG( FILTER, ENTRY, "test_filter_and: begin\n", 0, 0, 0 );
558 #else
559         Debug( LDAP_DEBUG_FILTER, "=> test_filter_and\n", 0, 0, 0 );
560 #endif
561
562
563         for ( f = flist; f != NULL; f = f->f_next ) {
564                 int rc = test_filter( op, e, f );
565
566                 if ( rc == LDAP_COMPARE_FALSE ) {
567                         /* filter is False */
568                         rtn = rc;
569                         break;
570                 }
571
572                 if ( rc != LDAP_COMPARE_TRUE ) {
573                         /* filter is Undefined unless later elements are False */
574                         rtn = rc;
575                 }
576         }
577
578 #ifdef NEW_LOGGING
579         LDAP_LOG( FILTER, RESULTS, "test_filter_and:  rc=%d\n", rtn, 0, 0 );
580 #else
581         Debug( LDAP_DEBUG_FILTER, "<= test_filter_and %d\n", rtn, 0, 0 );
582 #endif
583
584         return rtn;
585 }
586
587 static int
588 test_filter_or(
589         Operation       *op,
590         Entry   *e,
591         Filter  *flist
592 )
593 {
594         Filter  *f;
595         int rtn = LDAP_COMPARE_FALSE; /* False if empty */
596
597 #ifdef NEW_LOGGING
598         LDAP_LOG( FILTER, ENTRY, "test_filter_or: begin\n", 0, 0, 0 );
599 #else
600         Debug( LDAP_DEBUG_FILTER, "=> test_filter_or\n", 0, 0, 0 );
601 #endif
602
603
604         for ( f = flist; f != NULL; f = f->f_next ) {
605                 int rc = test_filter( op, e, f );
606
607                 if ( rc == LDAP_COMPARE_TRUE ) {
608                         /* filter is True */
609                         rtn = rc;
610                         break;
611                 }
612
613                 if ( rc != LDAP_COMPARE_FALSE ) {
614                         /* filter is Undefined unless later elements are True */
615                         rtn = rc;
616                 }
617         }
618
619 #ifdef NEW_LOGGING
620         LDAP_LOG( FILTER, ENTRY, "test_filter_or: result=%d\n", rtn, 0, 0 );
621 #else
622         Debug( LDAP_DEBUG_FILTER, "<= test_filter_or %d\n", rtn, 0, 0 );
623 #endif
624
625         return rtn;
626 }
627
628
629 static int
630 test_substrings_filter(
631         Operation       *op,
632         Entry   *e,
633         Filter  *f
634 )
635 {
636         Attribute       *a;
637
638 #ifdef NEW_LOGGING
639         LDAP_LOG( FILTER, ENTRY, "test_substrings_filter: begin\n", 0, 0, 0 );
640 #else
641         Debug( LDAP_DEBUG_FILTER, "begin test_substrings_filter\n", 0, 0, 0 );
642 #endif
643
644
645         if ( !access_allowed( op, e,
646                 f->f_sub_desc, NULL, ACL_SEARCH, NULL ) )
647         {
648                 return LDAP_INSUFFICIENT_ACCESS;
649         }
650
651         for(a = attrs_find( e->e_attrs, f->f_sub_desc );
652                 a != NULL;
653                 a = attrs_find( a->a_next, f->f_sub_desc ) )
654         {
655                 MatchingRule *mr = a->a_desc->ad_type->sat_substr;
656                 struct berval *bv;
657
658                 if( mr == NULL ) {
659                         continue;
660                 }
661
662                 for ( bv = a->a_nvals; bv->bv_val != NULL; bv++ )
663                 {
664                         int ret;
665                         int rc;
666                         const char *text;
667
668                         rc = value_match( &ret, a->a_desc, mr, 0,
669                                 bv, f->f_sub, &text );
670
671                         if( rc != LDAP_SUCCESS ) {
672                                 return rc;
673                         }
674
675                         if ( ret == 0 ) {
676                                 return LDAP_COMPARE_TRUE;
677                         }
678                 }
679         }
680
681 #ifdef NEW_LOGGING
682         LDAP_LOG( FILTER, ENTRY, "test_substrings_filter: return FALSE\n", 0, 0, 0 );
683 #else
684         Debug( LDAP_DEBUG_FILTER, "end test_substrings_filter 1\n", 0, 0, 0 );
685 #endif
686
687         return LDAP_COMPARE_FALSE;
688 }