1 /* $NetBSD: search.c,v 1.3 2021/08/14 16:14:58 christos Exp $ */
2
3 /* $OpenLDAP$ */
4 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
5 *
6 * Copyright 1998-2021 The OpenLDAP Foundation.
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted only as authorized by the OpenLDAP
11 * Public License.
12 *
13 * A copy of this license is available in the file LICENSE in the
14 * top-level directory of the distribution or, alternatively, at
15 * <http://www.OpenLDAP.org/license.html>.
16 */
17 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
18 * All rights reserved.
19 *
20 * Redistribution and use in source and binary forms are permitted
21 * provided that this notice is preserved and that due credit is given
22 * to the University of Michigan at Ann Arbor. The name of the University
23 * may not be used to endorse or promote products derived from this
24 * software without specific prior written permission. This software
25 * is provided ``as is'' without express or implied warranty.
26 */
27
28 #include <sys/cdefs.h>
29 __RCSID("$NetBSD: search.c,v 1.3 2021/08/14 16:14:58 christos Exp $");
30
31 #include "portable.h"
32
33 #include <stdio.h>
34
35 #include <ac/string.h>
36 #include <ac/socket.h>
37
38 #include "lutil.h"
39 #include "slap.h"
40
41 int
do_search(Operation * op,SlapReply * rs)42 do_search(
43 Operation *op, /* info about the op to which we're responding */
44 SlapReply *rs /* all the response data we'll send */ )
45 {
46 struct berval base = BER_BVNULL;
47 ber_len_t siz, off, i;
48
49 Debug( LDAP_DEBUG_TRACE, "%s do_search\n",
50 op->o_log_prefix );
51 /*
52 * Parse the search request. It looks like this:
53 *
54 * SearchRequest := [APPLICATION 3] SEQUENCE {
55 * baseObject DistinguishedName,
56 * scope ENUMERATED {
57 * baseObject (0),
58 * singleLevel (1),
59 * wholeSubtree (2),
60 * subordinate (3) -- OpenLDAP extension
61 * },
62 * derefAliases ENUMERATED {
63 * neverDerefaliases (0),
64 * derefInSearching (1),
65 * derefFindingBaseObj (2),
66 * alwaysDerefAliases (3)
67 * },
68 * sizelimit INTEGER (0 .. 65535),
69 * timelimit INTEGER (0 .. 65535),
70 * attrsOnly BOOLEAN,
71 * filter Filter,
72 * attributes SEQUENCE OF AttributeType
73 * }
74 */
75
76 /* baseObject, scope, derefAliases, sizelimit, timelimit, attrsOnly */
77 if ( ber_scanf( op->o_ber, "{miiiib" /*}*/,
78 &base, &op->ors_scope, &op->ors_deref, &op->ors_slimit,
79 &op->ors_tlimit, &op->ors_attrsonly ) == LBER_ERROR )
80 {
81 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
82 rs->sr_err = SLAPD_DISCONNECT;
83 goto return_results;
84 }
85
86 if ( op->ors_tlimit < 0 || op->ors_tlimit > SLAP_MAX_LIMIT ) {
87 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "invalid time limit" );
88 goto return_results;
89 }
90
91 if ( op->ors_slimit < 0 || op->ors_slimit > SLAP_MAX_LIMIT ) {
92 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "invalid size limit" );
93 goto return_results;
94 }
95
96 switch( op->ors_scope ) {
97 case LDAP_SCOPE_BASE:
98 case LDAP_SCOPE_ONELEVEL:
99 case LDAP_SCOPE_SUBTREE:
100 case LDAP_SCOPE_SUBORDINATE:
101 break;
102 default:
103 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "invalid scope" );
104 goto return_results;
105 }
106
107 switch( op->ors_deref ) {
108 case LDAP_DEREF_NEVER:
109 case LDAP_DEREF_FINDING:
110 case LDAP_DEREF_SEARCHING:
111 case LDAP_DEREF_ALWAYS:
112 break;
113 default:
114 send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "invalid deref" );
115 goto return_results;
116 }
117
118 rs->sr_err = dnPrettyNormal( NULL, &base, &op->o_req_dn, &op->o_req_ndn, op->o_tmpmemctx );
119 if( rs->sr_err != LDAP_SUCCESS ) {
120 Debug( LDAP_DEBUG_ANY, "%s do_search: invalid dn: \"%s\"\n",
121 op->o_log_prefix, base.bv_val );
122 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" );
123 goto return_results;
124 }
125
126 Debug( LDAP_DEBUG_ARGS, "SRCH \"%s\" %d %d %d %d %d\n",
127 base.bv_val, op->ors_scope, op->ors_deref,
128 op->ors_slimit, op->ors_tlimit, op->ors_attrsonly);
129
130 /* filter - returns a "normalized" version */
131 rs->sr_err = get_filter( op, op->o_ber, &op->ors_filter, &rs->sr_text );
132 if( rs->sr_err != LDAP_SUCCESS ) {
133 if( rs->sr_err == SLAPD_DISCONNECT ) {
134 rs->sr_err = LDAP_PROTOCOL_ERROR;
135 send_ldap_disconnect( op, rs );
136 rs->sr_err = SLAPD_DISCONNECT;
137 } else {
138 send_ldap_result( op, rs );
139 }
140 goto return_results;
141 }
142 filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
143
144 Debug( LDAP_DEBUG_ARGS, " filter: %s\n",
145 !BER_BVISEMPTY( &op->ors_filterstr ) ? op->ors_filterstr.bv_val : "empty" );
146
147 /* attributes */
148 siz = sizeof(AttributeName);
149 off = offsetof(AttributeName,an_name);
150 if ( ber_scanf( op->o_ber, "{M}}", &op->ors_attrs, &siz, off ) == LBER_ERROR ) {
151 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding attrs error" );
152 rs->sr_err = SLAPD_DISCONNECT;
153 goto return_results;
154 }
155 for ( i=0; i<siz; i++ ) {
156 const char *dummy; /* ignore msgs from bv2ad */
157 op->ors_attrs[i].an_desc = NULL;
158 op->ors_attrs[i].an_oc = NULL;
159 op->ors_attrs[i].an_flags = 0;
160 if ( slap_bv2ad( &op->ors_attrs[i].an_name,
161 &op->ors_attrs[i].an_desc, &dummy ) != LDAP_SUCCESS )
162 {
163 if ( slap_bv2undef_ad( &op->ors_attrs[i].an_name,
164 &op->ors_attrs[i].an_desc, &dummy,
165 SLAP_AD_PROXIED|SLAP_AD_NOINSERT ) )
166 {
167 struct berval *bv = &op->ors_attrs[i].an_name;
168
169 /* RFC 4511 LDAPv3: All User Attributes */
170 if ( bvmatch( bv, slap_bv_all_user_attrs ) ) {
171 continue;
172 }
173
174 /* RFC 3673 LDAPv3: All Operational Attributes */
175 if ( bvmatch( bv, slap_bv_all_operational_attrs ) ) {
176 continue;
177 }
178
179 /* RFC 4529 LDAP: Requesting Attributes by Object Class */
180 if ( bv->bv_len > 1 && bv->bv_val[0] == '@' ) {
181 /* FIXME: check if remaining is valid oc name? */
182 continue;
183 }
184
185 /* add more "exceptions" to RFC 4511 4.5.1.8. */
186
187 /* invalid attribute description? remove */
188 if ( ad_keystring( bv ) ) {
189 /* NOTE: parsed in-place, don't modify;
190 * rather add "1.1", which must be ignored */
191 BER_BVSTR( &op->ors_attrs[i].an_name, LDAP_NO_ATTRS );
192 }
193
194 /* otherwise leave in place... */
195 }
196 }
197 }
198
199 if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) {
200 Debug( LDAP_DEBUG_ANY, "%s do_search: get_ctrls failed\n",
201 op->o_log_prefix );
202 goto return_results;
203 }
204
205 if (LogTest( LDAP_DEBUG_ARGS ) ) {
206 char abuf[BUFSIZ/2], *ptr = abuf;
207 unsigned len = 0, alen;
208
209 if ( !siz ) {
210 len = 1;
211 abuf[0] = '\0';
212 }
213 for ( i = 0; i<siz; i++ ) {
214 alen = op->ors_attrs[i].an_name.bv_len;
215 if (alen >= sizeof(abuf)) {
216 alen = sizeof(abuf)-1;
217 }
218 if (len && (len + 1 + alen >= sizeof(abuf))) {
219 Debug( LDAP_DEBUG_ARGS, " attrs: %s\n", abuf );
220 len = 0;
221 ptr = abuf;
222 }
223 if (len) {
224 *ptr++ = ' ';
225 len++;
226 }
227 ptr = lutil_strncopy(ptr, op->ors_attrs[i].an_name.bv_val, alen);
228 len += alen;
229 *ptr = '\0';
230 }
231 if (len) {
232 Debug( LDAP_DEBUG_ARGS, " attrs: %s\n", abuf );
233 }
234 }
235
236 if (LogTest( LDAP_DEBUG_STATS ) ) {
237 char abuf[BUFSIZ/2], *ptr = abuf;
238 unsigned len = 0, alen;
239
240 sprintf(abuf, "scope=%d deref=%d", op->ors_scope, op->ors_deref);
241 Debug( LDAP_DEBUG_STATS,
242 "%s SRCH base=\"%s\" %s filter=\"%s\"\n",
243 op->o_log_prefix, op->o_req_dn.bv_val, abuf,
244 op->ors_filterstr.bv_val );
245
246 for ( i = 0; i<siz; i++ ) {
247 alen = op->ors_attrs[i].an_name.bv_len;
248 if (alen >= sizeof(abuf)) {
249 alen = sizeof(abuf)-1;
250 }
251 if (len && (len + 1 + alen >= sizeof(abuf))) {
252 Debug( LDAP_DEBUG_STATS, "%s SRCH attr=%s\n",
253 op->o_log_prefix, abuf );
254 len = 0;
255 ptr = abuf;
256 }
257 if (len) {
258 *ptr++ = ' ';
259 len++;
260 }
261 ptr = lutil_strncopy(ptr, op->ors_attrs[i].an_name.bv_val, alen);
262 len += alen;
263 *ptr = '\0';
264 }
265 if (len) {
266 Debug( LDAP_DEBUG_STATS, "%s SRCH attr=%s\n",
267 op->o_log_prefix, abuf );
268 }
269 }
270
271 op->o_bd = frontendDB;
272 rs->sr_err = frontendDB->be_search( op, rs );
273 if ( rs->sr_err == SLAPD_ASYNCOP ) {
274 /* skip cleanup */
275 return rs->sr_err;
276 }
277
278 return_results:;
279 if ( !BER_BVISNULL( &op->o_req_dn ) ) {
280 slap_sl_free( op->o_req_dn.bv_val, op->o_tmpmemctx );
281 }
282 if ( !BER_BVISNULL( &op->o_req_ndn ) ) {
283 slap_sl_free( op->o_req_ndn.bv_val, op->o_tmpmemctx );
284 }
285 if ( !BER_BVISNULL( &op->ors_filterstr ) ) {
286 op->o_tmpfree( op->ors_filterstr.bv_val, op->o_tmpmemctx );
287 }
288 if ( op->ors_filter != NULL) {
289 filter_free_x( op, op->ors_filter, 1 );
290 }
291 if ( op->ors_attrs != NULL ) {
292 op->o_tmpfree( op->ors_attrs, op->o_tmpmemctx );
293 }
294
295 return rs->sr_err;
296 }
297
298 int
fe_op_search(Operation * op,SlapReply * rs)299 fe_op_search( Operation *op, SlapReply *rs )
300 {
301 BackendDB *bd = op->o_bd;
302
303 if ( op->ors_scope == LDAP_SCOPE_BASE ) {
304 Entry *entry = NULL;
305
306 if ( BER_BVISEMPTY( &op->o_req_ndn ) ) {
307 #ifdef LDAP_CONNECTIONLESS
308 /* Ignore LDAPv2 CLDAP Root DSE queries */
309 if (op->o_protocol == LDAP_VERSION2 && op->o_conn->c_is_udp) {
310 goto return_results;
311 }
312 #endif
313 /* check restrictions */
314 if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
315 send_ldap_result( op, rs );
316 goto return_results;
317 }
318
319 rs->sr_err = root_dse_info( op->o_conn, &entry, &rs->sr_text );
320
321 } else if ( bvmatch( &op->o_req_ndn, &frontendDB->be_schemandn ) ) {
322 /* check restrictions */
323 if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
324 send_ldap_result( op, rs );
325 goto return_results;
326 }
327
328 rs->sr_err = schema_info( &entry, &rs->sr_text );
329 }
330
331 if( rs->sr_err != LDAP_SUCCESS ) {
332 send_ldap_result( op, rs );
333 goto return_results;
334
335 } else if ( entry != NULL ) {
336 if ( get_assert( op ) &&
337 ( test_filter( op, entry, get_assertion( op )) != LDAP_COMPARE_TRUE )) {
338 rs->sr_err = LDAP_ASSERTION_FAILED;
339 goto fail1;
340 }
341
342 rs->sr_err = test_filter( op, entry, op->ors_filter );
343
344 if( rs->sr_err == LDAP_COMPARE_TRUE ) {
345 /* note: we set no limits because either
346 * no limit is specified, or at least 1
347 * is specified, and we're going to return
348 * at most one entry */
349 op->ors_slimit = SLAP_NO_LIMIT;
350 op->ors_tlimit = SLAP_NO_LIMIT;
351
352 rs->sr_entry = entry;
353 rs->sr_attrs = op->ors_attrs;
354 rs->sr_operational_attrs = NULL;
355 rs->sr_flags = 0;
356 send_search_entry( op, rs );
357 rs->sr_entry = NULL;
358 rs->sr_operational_attrs = NULL;
359 }
360 rs->sr_err = LDAP_SUCCESS;
361 fail1:
362 entry_free( entry );
363 send_ldap_result( op, rs );
364 goto return_results;
365 }
366 }
367
368 if( BER_BVISEMPTY( &op->o_req_ndn ) && !BER_BVISEMPTY( &default_search_nbase ) ) {
369 slap_sl_free( op->o_req_dn.bv_val, op->o_tmpmemctx );
370 slap_sl_free( op->o_req_ndn.bv_val, op->o_tmpmemctx );
371
372 ber_dupbv_x( &op->o_req_dn, &default_search_base, op->o_tmpmemctx );
373 ber_dupbv_x( &op->o_req_ndn, &default_search_nbase, op->o_tmpmemctx );
374 }
375
376 /*
377 * We could be serving multiple database backends. Select the
378 * appropriate one, or send a referral to our "referral server"
379 * if we don't hold it.
380 */
381
382 op->o_bd = select_backend( &op->o_req_ndn, 1 );
383 if ( op->o_bd == NULL ) {
384 rs->sr_ref = referral_rewrite( default_referral,
385 NULL, &op->o_req_dn, op->ors_scope );
386
387 if (!rs->sr_ref) rs->sr_ref = default_referral;
388 rs->sr_err = LDAP_REFERRAL;
389 op->o_bd = bd;
390 send_ldap_result( op, rs );
391
392 if (rs->sr_ref != default_referral)
393 ber_bvarray_free( rs->sr_ref );
394 rs->sr_ref = NULL;
395 goto return_results;
396 }
397
398 /* check restrictions */
399 if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
400 send_ldap_result( op, rs );
401 goto return_results;
402 }
403
404 /* check for referrals */
405 if( backend_check_referrals( op, rs ) != LDAP_SUCCESS ) {
406 goto return_results;
407 }
408
409 if ( SLAP_SHADOW(op->o_bd) && get_dontUseCopy(op) ) {
410 /* don't use shadow copy */
411 BerVarray defref = op->o_bd->be_update_refs
412 ? op->o_bd->be_update_refs : default_referral;
413
414 if( defref != NULL ) {
415 rs->sr_ref = referral_rewrite( defref,
416 NULL, &op->o_req_dn, op->ors_scope );
417 if( !rs->sr_ref) rs->sr_ref = defref;
418 rs->sr_err = LDAP_REFERRAL;
419 send_ldap_result( op, rs );
420
421 if (rs->sr_ref != defref) ber_bvarray_free( rs->sr_ref );
422
423 } else {
424 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
425 "copy not used; no referral information available" );
426 }
427
428 } else if ( op->o_bd->be_search ) {
429 if ( limits_check( op, rs ) == 0 ) {
430 /* actually do the search and send the result(s) */
431 (op->o_bd->be_search)( op, rs );
432 }
433 /* else limits_check() sends error */
434
435 } else {
436 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
437 "operation not supported within namingContext" );
438 }
439
440 return_results:;
441 op->o_bd = bd;
442 return rs->sr_err;
443 }
444
445