1 /* $NetBSD: modrdn.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 1999, Juan C. Gomez, All rights reserved.
18 * This software is not subject to any license of Silicon Graphics
19 * Inc. or Purdue University.
20 *
21 * Redistribution and use in source and binary forms are permitted
22 * without restriction or fee of any kind as long as this notice
23 * is preserved.
24 */
25 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
26 * All rights reserved.
27 *
28 * Redistribution and use in source and binary forms are permitted
29 * provided that this notice is preserved and that due credit is given
30 * to the University of Michigan at Ann Arbor. The name of the University
31 * may not be used to endorse or promote products derived from this
32 * software without specific prior written permission. This software
33 * is provided ``as is'' without express or implied warranty.
34 */
35
36 #include <sys/cdefs.h>
37 __RCSID("$NetBSD: modrdn.c,v 1.3 2021/08/14 16:14:58 christos Exp $");
38
39 #include "portable.h"
40
41 #include <stdio.h>
42
43 #include <ac/socket.h>
44 #include <ac/string.h>
45
46 #include "slap.h"
47
48 int
do_modrdn(Operation * op,SlapReply * rs)49 do_modrdn(
50 Operation *op,
51 SlapReply *rs
52 )
53 {
54 struct berval dn = BER_BVNULL;
55 struct berval newrdn = BER_BVNULL;
56 struct berval newSuperior = BER_BVNULL;
57 ber_int_t deloldrdn;
58
59 struct berval pnewSuperior = BER_BVNULL;
60
61 struct berval nnewSuperior = BER_BVNULL;
62
63 ber_len_t length;
64
65 Debug( LDAP_DEBUG_TRACE, "%s do_modrdn\n",
66 op->o_log_prefix );
67 /*
68 * Parse the modrdn request. It looks like this:
69 *
70 * ModifyRDNRequest := SEQUENCE {
71 * entry DistinguishedName,
72 * newrdn RelativeDistinguishedName
73 * deleteoldrdn BOOLEAN,
74 * newSuperior [0] LDAPDN OPTIONAL (v3 Only!)
75 * }
76 */
77
78 if ( ber_scanf( op->o_ber, "{mmb", &dn, &newrdn, &deloldrdn )
79 == LBER_ERROR )
80 {
81 Debug( LDAP_DEBUG_ANY, "%s do_modrdn: ber_scanf failed\n",
82 op->o_log_prefix );
83 send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
84 return SLAPD_DISCONNECT;
85 }
86
87 /* Check for newSuperior parameter, if present scan it */
88
89 if ( ber_peek_tag( op->o_ber, &length ) == LDAP_TAG_NEWSUPERIOR ) {
90 if ( op->o_protocol < LDAP_VERSION3 ) {
91 /* Connection record indicates v2 but field
92 * newSuperior is present: report error.
93 */
94 Debug( LDAP_DEBUG_ANY,
95 "%s do_modrdn: newSuperior requires LDAPv3\n",
96 op->o_log_prefix );
97
98 send_ldap_discon( op, rs,
99 LDAP_PROTOCOL_ERROR, "newSuperior requires LDAPv3" );
100 rs->sr_err = SLAPD_DISCONNECT;
101 goto cleanup;
102 }
103
104 if ( ber_scanf( op->o_ber, "m", &newSuperior )
105 == LBER_ERROR ) {
106
107 Debug( LDAP_DEBUG_ANY, "%s do_modrdn: ber_scanf(\"m\") failed\n",
108 op->o_log_prefix );
109
110 send_ldap_discon( op, rs,
111 LDAP_PROTOCOL_ERROR, "decoding error" );
112 rs->sr_err = SLAPD_DISCONNECT;
113 goto cleanup;
114 }
115 op->orr_newSup = &pnewSuperior;
116 op->orr_nnewSup = &nnewSuperior;
117 }
118
119 Debug( LDAP_DEBUG_ARGS,
120 "do_modrdn: dn (%s) newrdn (%s) newsuperior (%s)\n",
121 dn.bv_val, newrdn.bv_val,
122 newSuperior.bv_len ? newSuperior.bv_val : "" );
123
124 if ( ber_scanf( op->o_ber, /*{*/ "}") == LBER_ERROR ) {
125 Debug( LDAP_DEBUG_ANY, "%s do_modrdn: ber_scanf failed\n",
126 op->o_log_prefix );
127 send_ldap_discon( op, rs,
128 LDAP_PROTOCOL_ERROR, "decoding error" );
129 rs->sr_err = SLAPD_DISCONNECT;
130 goto cleanup;
131 }
132
133 if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) {
134 Debug( LDAP_DEBUG_ANY, "%s do_modrdn: get_ctrls failed\n",
135 op->o_log_prefix );
136 /* get_ctrls has sent results. Now clean up. */
137 goto cleanup;
138 }
139
140 rs->sr_err = dnPrettyNormal( NULL, &dn, &op->o_req_dn, &op->o_req_ndn, op->o_tmpmemctx );
141 if( rs->sr_err != LDAP_SUCCESS ) {
142 Debug( LDAP_DEBUG_ANY, "%s do_modrdn: invalid dn (%s)\n",
143 op->o_log_prefix, dn.bv_val );
144 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" );
145 goto cleanup;
146 }
147
148 /* FIXME: should have/use rdnPretty / rdnNormalize routines */
149
150 rs->sr_err = dnPrettyNormal( NULL, &newrdn, &op->orr_newrdn, &op->orr_nnewrdn, op->o_tmpmemctx );
151 if( rs->sr_err != LDAP_SUCCESS ) {
152 Debug( LDAP_DEBUG_ANY, "%s do_modrdn: invalid newrdn (%s)\n",
153 op->o_log_prefix, newrdn.bv_val );
154 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid new RDN" );
155 goto cleanup;
156 }
157
158 if( rdn_validate( &op->orr_newrdn ) != LDAP_SUCCESS ) {
159 Debug( LDAP_DEBUG_ANY, "%s do_modrdn: invalid rdn (%s)\n",
160 op->o_log_prefix, op->orr_newrdn.bv_val );
161 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid new RDN" );
162 goto cleanup;
163 }
164
165 if( op->orr_newSup ) {
166 rs->sr_err = dnPrettyNormal( NULL, &newSuperior, &pnewSuperior,
167 &nnewSuperior, op->o_tmpmemctx );
168 if( rs->sr_err != LDAP_SUCCESS ) {
169 Debug( LDAP_DEBUG_ANY,
170 "%s do_modrdn: invalid newSuperior (%s)\n",
171 op->o_log_prefix, newSuperior.bv_val );
172 send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid newSuperior" );
173 goto cleanup;
174 }
175 }
176
177 Debug( LDAP_DEBUG_STATS, "%s MODRDN dn=\"%s\"\n",
178 op->o_log_prefix, op->o_req_dn.bv_val );
179
180 op->orr_deleteoldrdn = deloldrdn;
181 op->orr_modlist = NULL;
182
183 /* prepare modlist of modifications from old/new RDN */
184 rs->sr_err = slap_modrdn2mods( op, rs );
185 if ( rs->sr_err != LDAP_SUCCESS ) {
186 send_ldap_result( op, rs );
187 goto cleanup;
188 }
189
190 op->o_bd = frontendDB;
191 rs->sr_err = frontendDB->be_modrdn( op, rs );
192
193 if ( rs->sr_err == SLAPD_ASYNCOP ) {
194 /* skip cleanup */
195 return rs->sr_err;
196 }
197 if( rs->sr_err == LDAP_TXN_SPECIFY_OKAY ) {
198 /* skip cleanup */
199 return rs->sr_err;
200 }
201
202 cleanup:
203 op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
204 op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
205
206 op->o_tmpfree( op->orr_newrdn.bv_val, op->o_tmpmemctx );
207 op->o_tmpfree( op->orr_nnewrdn.bv_val, op->o_tmpmemctx );
208
209 if ( op->orr_modlist != NULL )
210 slap_mods_free( op->orr_modlist, 1 );
211
212 if ( !BER_BVISNULL( &pnewSuperior ) ) {
213 op->o_tmpfree( pnewSuperior.bv_val, op->o_tmpmemctx );
214 }
215 if ( !BER_BVISNULL( &nnewSuperior ) ) {
216 op->o_tmpfree( nnewSuperior.bv_val, op->o_tmpmemctx );
217 }
218
219 return rs->sr_err;
220 }
221
222 int
fe_op_modrdn(Operation * op,SlapReply * rs)223 fe_op_modrdn( Operation *op, SlapReply *rs )
224 {
225 struct berval dest_ndn = BER_BVNULL, dest_pndn, pdn = BER_BVNULL;
226 BackendDB *op_be, *bd = op->o_bd;
227 ber_slen_t diff;
228
229 if( op->o_req_ndn.bv_len == 0 ) {
230 Debug( LDAP_DEBUG_ANY, "%s do_modrdn: root dse!\n",
231 op->o_log_prefix );
232 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
233 "cannot rename the root DSE" );
234 goto cleanup;
235
236 } else if ( bvmatch( &op->o_req_ndn, &frontendDB->be_schemandn ) ) {
237 Debug( LDAP_DEBUG_ANY, "%s do_modrdn: subschema subentry: %s (%ld)\n",
238 op->o_log_prefix, frontendDB->be_schemandn.bv_val, (long)frontendDB->be_schemandn.bv_len );
239
240 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
241 "cannot rename subschema subentry" );
242 goto cleanup;
243 }
244
245 if( op->orr_nnewSup ) {
246 dest_pndn = *op->orr_nnewSup;
247 } else {
248 dnParent( &op->o_req_ndn, &dest_pndn );
249 }
250 build_new_dn( &dest_ndn, &dest_pndn, &op->orr_nnewrdn, op->o_tmpmemctx );
251
252 diff = (ber_slen_t) dest_ndn.bv_len - (ber_slen_t) op->o_req_ndn.bv_len;
253 if ( diff > 0 ? dnIsSuffix( &dest_ndn, &op->o_req_ndn )
254 : diff < 0 && dnIsSuffix( &op->o_req_ndn, &dest_ndn ) )
255 {
256 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
257 diff > 0 ? "cannot place an entry below itself"
258 : "cannot place an entry above itself" );
259 goto cleanup;
260 }
261
262 /*
263 * We could be serving multiple database backends. Select the
264 * appropriate one, or send a referral to our "referral server"
265 * if we don't hold it.
266 */
267 op->o_bd = select_backend( &op->o_req_ndn, 1 );
268 if ( op->o_bd == NULL ) {
269 op->o_bd = bd;
270 rs->sr_ref = referral_rewrite( default_referral,
271 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
272 if (!rs->sr_ref) rs->sr_ref = default_referral;
273
274 if ( rs->sr_ref != NULL ) {
275 rs->sr_err = LDAP_REFERRAL;
276 send_ldap_result( op, rs );
277
278 if (rs->sr_ref != default_referral) ber_bvarray_free( rs->sr_ref );
279 } else {
280 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
281 "no global superior knowledge" );
282 }
283 goto cleanup;
284 }
285
286 /* If we've got a glued backend, check the real backend */
287 op_be = op->o_bd;
288 if ( SLAP_GLUE_INSTANCE( op->o_bd )) {
289 op->o_bd = select_backend( &op->o_req_ndn, 0 );
290 }
291
292 /* check restrictions */
293 if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
294 send_ldap_result( op, rs );
295 goto cleanup;
296 }
297
298 /* check for referrals */
299 if ( backend_check_referrals( op, rs ) != LDAP_SUCCESS ) {
300 goto cleanup;
301 }
302
303 /* check that destination DN is in the same backend as source DN */
304 if ( select_backend( &dest_ndn, 0 ) != op->o_bd ) {
305 send_ldap_error( op, rs, LDAP_AFFECTS_MULTIPLE_DSAS,
306 "cannot rename between DSAs" );
307 goto cleanup;
308 }
309
310 /*
311 * do the modrdn if 1 && (2 || 3)
312 * 1) there is a modrdn function implemented in this backend;
313 * 2) this backend is the provider for what it holds;
314 * 3) it's a replica and the dn supplied is the update_ndn.
315 */
316 if ( op->o_bd->be_modrdn ) {
317 /* do the update here */
318 int repl_user = be_isupdate( op );
319 if ( !SLAP_SINGLE_SHADOW(op->o_bd) || repl_user )
320 {
321 if ( op->o_txnSpec ) {
322 txn_preop( op, rs );
323 goto cleanup;
324 }
325
326 op->o_bd = op_be;
327 op->o_bd->be_modrdn( op, rs );
328
329 if ( op->o_bd->be_delete ) {
330 struct berval org_req_dn = BER_BVNULL;
331 struct berval org_req_ndn = BER_BVNULL;
332 struct berval org_dn = BER_BVNULL;
333 struct berval org_ndn = BER_BVNULL;
334 int org_managedsait;
335
336 org_req_dn = op->o_req_dn;
337 org_req_ndn = op->o_req_ndn;
338 org_dn = op->o_dn;
339 org_ndn = op->o_ndn;
340 org_managedsait = get_manageDSAit( op );
341 op->o_dn = op->o_bd->be_rootdn;
342 op->o_ndn = op->o_bd->be_rootndn;
343 op->o_managedsait = SLAP_CONTROL_NONCRITICAL;
344
345 while ( rs->sr_err == LDAP_SUCCESS &&
346 op->o_delete_glue_parent ) {
347 op->o_delete_glue_parent = 0;
348 if ( !be_issuffix( op->o_bd, &op->o_req_ndn )) {
349 slap_callback cb = { NULL };
350 cb.sc_response = slap_null_cb;
351 dnParent( &op->o_req_ndn, &pdn );
352 op->o_req_dn = pdn;
353 op->o_req_ndn = pdn;
354 op->o_callback = &cb;
355 op->o_bd->be_delete( op, rs );
356 } else {
357 break;
358 }
359 }
360 op->o_managedsait = org_managedsait;
361 op->o_dn = org_dn;
362 op->o_ndn = org_ndn;
363 op->o_req_dn = org_req_dn;
364 op->o_req_ndn = org_req_ndn;
365 op->o_delete_glue_parent = 0;
366 }
367
368 } else {
369 BerVarray defref = op->o_bd->be_update_refs
370 ? op->o_bd->be_update_refs : default_referral;
371
372 if ( defref != NULL ) {
373 rs->sr_ref = referral_rewrite( defref,
374 NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
375 if (!rs->sr_ref) rs->sr_ref = defref;
376
377 rs->sr_err = LDAP_REFERRAL;
378 send_ldap_result( op, rs );
379
380 if (rs->sr_ref != defref) ber_bvarray_free( rs->sr_ref );
381 } else {
382 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
383 "shadow context; no update referral" );
384 }
385 }
386 } else {
387 send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
388 "operation not supported within namingContext" );
389 }
390
391 cleanup:;
392 if ( dest_ndn.bv_val != NULL )
393 ber_memfree_x( dest_ndn.bv_val, op->o_tmpmemctx );
394 op->o_bd = bd;
395 return rs->sr_err;
396 }
397
398 /* extracted from slap_modrdn2mods() */
399 static int
mod_op_add_val(Operation * op,AttributeDescription * const desc,struct berval * const val,short const sm_op)400 mod_op_add_val(
401 Operation *op,
402 AttributeDescription * const desc,
403 struct berval * const val,
404 short const sm_op )
405 {
406 int rv = LDAP_SUCCESS;
407 Modifications *mod_tmp;
408 mod_tmp = ( Modifications * )ch_malloc( sizeof( Modifications ) );
409 mod_tmp->sml_desc = desc;
410 BER_BVZERO( &mod_tmp->sml_type );
411 mod_tmp->sml_numvals = 1;
412 mod_tmp->sml_values = ( BerVarray )ch_malloc( 2 * sizeof( struct berval ) );
413 ber_dupbv( &mod_tmp->sml_values[0], val );
414 mod_tmp->sml_values[1].bv_val = NULL;
415 if( desc->ad_type->sat_equality && desc->ad_type->sat_equality->smr_normalize) {
416 mod_tmp->sml_nvalues = ( BerVarray )ch_malloc( 2 * sizeof( struct berval ) );
417 rv = desc->ad_type->sat_equality->smr_normalize(
418 SLAP_MR_EQUALITY|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
419 desc->ad_type->sat_syntax,
420 desc->ad_type->sat_equality,
421 &mod_tmp->sml_values[0],
422 &mod_tmp->sml_nvalues[0], NULL );
423 if (rv != LDAP_SUCCESS) {
424 ch_free(mod_tmp->sml_nvalues);
425 ch_free(mod_tmp->sml_values[0].bv_val);
426 ch_free(mod_tmp->sml_values);
427 ch_free(mod_tmp);
428 goto done;
429 }
430 mod_tmp->sml_nvalues[1].bv_val = NULL;
431 } else {
432 mod_tmp->sml_nvalues = NULL;
433 }
434 mod_tmp->sml_op = sm_op;
435 mod_tmp->sml_flags = 0;
436 mod_tmp->sml_next = op->orr_modlist;
437 op->orr_modlist = mod_tmp;
438 done:
439 return rv;
440 }
441
442 int
slap_modrdn2mods(Operation * op,SlapReply * rs)443 slap_modrdn2mods(
444 Operation *op,
445 SlapReply *rs )
446 {
447 int a_cnt, d_cnt;
448 LDAPRDN old_rdn = NULL;
449 LDAPRDN new_rdn = NULL;
450
451 assert( !BER_BVISEMPTY( &op->oq_modrdn.rs_newrdn ) );
452
453 /* if requestDN is empty, silently reset deleteOldRDN */
454 if ( BER_BVISEMPTY( &op->o_req_dn ) ) op->orr_deleteoldrdn = 0;
455
456 if ( ldap_bv2rdn_x( &op->oq_modrdn.rs_newrdn, &new_rdn,
457 (char **)&rs->sr_text, LDAP_DN_FORMAT_LDAP, op->o_tmpmemctx ) ) {
458 Debug( LDAP_DEBUG_TRACE,
459 "%s slap_modrdn2mods: can't figure out "
460 "type(s)/value(s) of newrdn\n",
461 op->o_log_prefix );
462 rs->sr_err = LDAP_INVALID_DN_SYNTAX;
463 rs->sr_text = "unknown type(s)/value(s) used in RDN";
464 goto done;
465 }
466
467 if ( op->oq_modrdn.rs_deleteoldrdn ) {
468 if ( ldap_bv2rdn_x( &op->o_req_dn, &old_rdn,
469 (char **)&rs->sr_text, LDAP_DN_FORMAT_LDAP, op->o_tmpmemctx ) ) {
470 Debug( LDAP_DEBUG_TRACE,
471 "%s slap_modrdn2mods: can't figure out "
472 "type(s)/value(s) of oldrdn\n",
473 op->o_log_prefix );
474 rs->sr_err = LDAP_OTHER;
475 rs->sr_text = "cannot parse RDN from old DN";
476 goto done;
477 }
478 }
479 rs->sr_text = NULL;
480
481 /* Add new attribute values to the entry */
482 for ( a_cnt = 0; new_rdn[a_cnt]; a_cnt++ ) {
483 AttributeDescription *desc = NULL;
484
485 rs->sr_err = slap_bv2ad( &new_rdn[a_cnt]->la_attr, &desc, &rs->sr_text );
486
487 if ( rs->sr_err != LDAP_SUCCESS ) {
488 Debug( LDAP_DEBUG_TRACE,
489 "%s slap_modrdn2mods: %s: %s (new)\n",
490 op->o_log_prefix,
491 rs->sr_text,
492 new_rdn[ a_cnt ]->la_attr.bv_val );
493 goto done;
494 }
495
496 if ( !desc->ad_type->sat_equality ) {
497 Debug( LDAP_DEBUG_TRACE,
498 "%s slap_modrdn2mods: %s: %s (new)\n",
499 op->o_log_prefix,
500 rs->sr_text,
501 new_rdn[ a_cnt ]->la_attr.bv_val );
502 rs->sr_text = "naming attribute has no equality matching rule";
503 rs->sr_err = LDAP_NAMING_VIOLATION;
504 goto done;
505 }
506
507 /* Apply modification */
508 rs->sr_err = mod_op_add_val( op, desc, &new_rdn[a_cnt]->la_value, SLAP_MOD_SOFTADD );
509 if (rs->sr_err != LDAP_SUCCESS)
510 goto done;
511 }
512
513 /* Remove old rdn value if required */
514 if ( op->orr_deleteoldrdn ) {
515 for ( d_cnt = 0; old_rdn[d_cnt]; d_cnt++ ) {
516 AttributeDescription *desc = NULL;
517
518 rs->sr_err = slap_bv2ad( &old_rdn[d_cnt]->la_attr, &desc, &rs->sr_text );
519 if ( rs->sr_err != LDAP_SUCCESS ) {
520 Debug( LDAP_DEBUG_TRACE,
521 "%s slap_modrdn2mods: %s: %s (old)\n",
522 op->o_log_prefix,
523 rs->sr_text,
524 old_rdn[d_cnt]->la_attr.bv_val );
525 goto done;
526 }
527
528 /* Apply modification */
529 rs->sr_err = mod_op_add_val( op, desc, &old_rdn[d_cnt]->la_value, LDAP_MOD_DELETE );
530 if (rs->sr_err != LDAP_SUCCESS)
531 goto done;
532 }
533 }
534
535 done:
536
537 /* LDAP v2 supporting correct attribute handling. */
538 if ( rs->sr_err != LDAP_SUCCESS && op->orr_modlist != NULL ) {
539 slap_mods_free( op->orr_modlist, 1 );
540 op->orr_modlist = NULL;
541 }
542
543 if ( new_rdn != NULL ) {
544 ldap_rdnfree_x( new_rdn, op->o_tmpmemctx );
545 }
546 if ( old_rdn != NULL ) {
547 ldap_rdnfree_x( old_rdn, op->o_tmpmemctx );
548 }
549
550 return rs->sr_err;
551 }
552
553