git.sur5r.net Git - openldap/blob - servers/slapd/back-ldap/search.c

   1 /* search.c - ldap backend search function */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1999-2004 The OpenLDAP Foundation.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * Portions Copyright 2000-2003 Pierangelo Masarati.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted only as authorized by the OpenLDAP
  12  * Public License.
  13  *
  14  * A copy of this license is available in the file LICENSE in the
  15  * top-level directory of the distribution or, alternatively, at
  16  * <http://www.OpenLDAP.org/license.html>.
  17  */
  18 /* ACKNOWLEDGEMENTS:
  19  * This work was initially developed by the Howard Chu for inclusion
  20  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  21  * Masarati.
  22  */
  23
  24 #include "portable.h"
  25
  26 #include <stdio.h>
  27
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30 #include <ac/time.h>
  31
  32 #include "slap.h"
  33 #include "back-ldap.h"
  34 #undef ldap_debug       /* silence a warning in ldap-int.h */
  35 #include "../../../libraries/libldap/ldap-int.h"
  36
  37 #include "lutil.h"
  38
  39 static int
  40 ldap_build_entry( Operation *op, LDAPMessage *e, Entry *ent,
  41          struct berval *bdn, int flags );
  42 #define LDAP_BUILD_ENTRY_PRIVATE        0x01
  43 #define LDAP_BUILD_ENTRY_NORMALIZE      0x02
  44
  45 static struct berval dummy = { 0, NULL };
  46
  47 int
  48 ldap_back_search(
  49     Operation   *op,
  50     SlapReply *rs )
  51 {
  52         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
  53         struct ldapconn *lc;
  54         struct timeval  tv;
  55         LDAPMessage             *res, *e;
  56         int     rc = 0, msgid;
  57         struct berval match = { 0, NULL };
  58         char **mapped_attrs = NULL;
  59         struct berval mbase;
  60         struct berval mfilter = { 0, NULL };
  61         struct slap_limits_set *limit = NULL;
  62         int isroot = 0;
  63         int dontfreetext = 0;
  64         dncookie dc;
  65 #ifdef LDAP_BACK_PROXY_AUTHZ
  66         LDAPControl **ctrls = NULL;
  67 #endif /* LDAP_BACK_PROXY_AUTHZ */
  68
  69         lc = ldap_back_getconn(op, rs);
  70         if ( !lc ) {
  71                 return( -1 );
  72         }
  73
  74         /*
  75          * FIXME: in case of values return filter, we might want
  76          * to map attrs and maybe rewrite value
  77          */
  78         if ( !ldap_back_dobind( lc, op, rs ) ) {
  79                 return( -1 );
  80         }
  81
  82         /* if not root, get appropriate limits */
  83         if ( be_isroot( op->o_bd, &op->o_ndn ) ) {
  84                 isroot = 1;
  85         } else {
  86                 ( void ) get_limits( op, &op->o_ndn, &limit );
  87         }
  88
  89         /* if no time limit requested, rely on remote server limits */
  90         /* if requested limit higher than hard limit, abort */
  91         if ( !isroot && op->oq_search.rs_tlimit > limit->lms_t_hard ) {
  92                 /* no hard limit means use soft instead */
  93                 if ( limit->lms_t_hard == 0
  94                                 && limit->lms_t_soft > -1
  95                                 && op->oq_search.rs_tlimit > limit->lms_t_soft ) {
  96                         op->oq_search.rs_tlimit = limit->lms_t_soft;
  97
  98                 /* positive hard limit means abort */
  99                 } else if ( limit->lms_t_hard > 0 ) {
 100                         rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 101                         rc = 0;
 102                         goto finish;
 103                 }
 104
 105                 /* negative hard limit means no limit */
 106         }
 107
 108         /* if no size limit requested, rely on remote server limits */
 109         /* if requested limit higher than hard limit, abort */
 110         if ( !isroot && op->oq_search.rs_slimit > limit->lms_s_hard ) {
 111                 /* no hard limit means use soft instead */
 112                 if ( limit->lms_s_hard == 0
 113                                 && limit->lms_s_soft > -1
 114                                 && op->oq_search.rs_slimit > limit->lms_s_soft ) {
 115                         op->oq_search.rs_slimit = limit->lms_s_soft;
 116
 117                 /* positive hard limit means abort */
 118                 } else if ( limit->lms_s_hard > 0 ) {
 119                         rs->sr_err = LDAP_ADMINLIMIT_EXCEEDED;
 120                         rc = 0;
 121                         goto finish;
 122                 }
 123
 124                 /* negative hard limit means no limit */
 125         }
 126
 127         /* should we check return values? */
 128         if (op->oq_search.rs_deref != -1)
 129                 ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&op->oq_search.rs_deref);
 130         if (op->oq_search.rs_tlimit != -1) {
 131                 tv.tv_sec = op->oq_search.rs_tlimit;
 132                 tv.tv_usec = 0;
 133         } else {
 134                 tv.tv_sec = 0;
 135         }
 136
 137         /*
 138          * Rewrite the search base, if required
 139          */
 140         dc.rwmap = &li->rwmap;
 141 #ifdef ENABLE_REWRITE
 142         dc.conn = op->o_conn;
 143         dc.rs = rs;
 144         dc.ctx = "searchBase";
 145 #else
 146         dc.tofrom = 1;
 147         dc.normalized = 0;
 148 #endif
 149         if ( ldap_back_dn_massage( &dc, &op->o_req_ndn, &mbase ) ) {
 150                 send_ldap_result( op, rs );
 151                 return -1;
 152         }
 153
 154         rc = ldap_back_filter_map_rewrite( &dc, op->oq_search.rs_filter,
 155                         &mfilter, BACKLDAP_MAP );
 156
 157         switch ( rc ) {
 158         case LDAP_SUCCESS:
 159                 break;
 160
 161         case LDAP_COMPARE_FALSE:
 162                 rs->sr_err = LDAP_SUCCESS;
 163                 rs->sr_text = NULL;
 164                 rc = 0;
 165                 goto finish;
 166
 167         default:
 168                 rs->sr_err = LDAP_OTHER;
 169                 rs->sr_text = "Rewrite error";
 170                 dontfreetext = 1;
 171                 rc = -1;
 172                 goto finish;
 173         }
 174
 175         rs->sr_err = ldap_back_map_attrs( &li->rwmap.rwm_at,
 176                         op->oq_search.rs_attrs,
 177                         BACKLDAP_MAP, &mapped_attrs );
 178         if ( rs->sr_err ) {
 179                 rc = -1;
 180                 goto finish;
 181         }
 182
 183 #ifdef LDAP_BACK_PROXY_AUTHZ
 184         rc = ldap_back_proxy_authz_ctrl( lc, op, rs, &ctrls );
 185         if ( rc != LDAP_SUCCESS ) {
 186                 dontfreetext = 1;
 187                 goto finish;
 188         }
 189 #endif /* LDAP_BACK_PROXY_AUTHZ */
 190
 191         rs->sr_err = ldap_search_ext(lc->ld, mbase.bv_val,
 192                         op->oq_search.rs_scope, mfilter.bv_val,
 193                         mapped_attrs, op->oq_search.rs_attrsonly,
 194 #ifdef LDAP_BACK_PROXY_AUTHZ
 195                         ctrls,
 196 #else /* ! LDAP_BACK_PROXY_AUTHZ */
 197                         op->o_ctrls,
 198 #endif /* ! LDAP_BACK_PROXY_AUTHZ */
 199                         NULL,
 200                         tv.tv_sec ? &tv : NULL, op->oq_search.rs_slimit,
 201                         &msgid );
 202
 203         if ( rs->sr_err != LDAP_SUCCESS ) {
 204 fail:;
 205                 rc = ldap_back_op_result(lc, op, rs, msgid, 0);
 206                 goto finish;
 207         }
 208
 209         /* We pull apart the ber result, stuff it into a slapd entry, and
 210          * let send_search_entry stuff it back into ber format. Slow & ugly,
 211          * but this is necessary for version matching, and for ACL processing.
 212          */
 213
 214         for ( rc=0; rc != -1; rc = ldap_result(lc->ld, msgid, 0, &tv, &res))
 215         {
 216                 /* check for abandon */
 217                 if (op->o_abandon) {
 218                         ldap_abandon(lc->ld, msgid);
 219                         rc = 0;
 220                         goto finish;
 221                 }
 222
 223                 if (rc == 0) {
 224                         tv.tv_sec = 0;
 225                         tv.tv_usec = 100000;
 226                         ldap_pvt_thread_yield();
 227
 228                 } else if (rc == LDAP_RES_SEARCH_ENTRY) {
 229                         Entry ent = {0};
 230                         struct berval bdn;
 231                         int abort = 0;
 232                         e = ldap_first_entry(lc->ld,res);
 233                         if ( ( rc = ldap_build_entry(op, e, &ent, &bdn,
 234                                                 LDAP_BUILD_ENTRY_PRIVATE)) == LDAP_SUCCESS ) {
 235                                 rs->sr_entry = &ent;
 236                                 rs->sr_attrs = op->oq_search.rs_attrs;
 237                                 abort = send_search_entry( op, rs );
 238                                 while (ent.e_attrs) {
 239                                         Attribute *a;
 240                                         BerVarray v;
 241
 242                                         a = ent.e_attrs;
 243                                         ent.e_attrs = a->a_next;
 244
 245                                         v = a->a_vals;
 246                                         if (a->a_vals != &dummy)
 247                                                 ber_bvarray_free(a->a_vals);
 248                                         if (a->a_nvals != v)
 249                                                 ber_bvarray_free(a->a_nvals);
 250                                         ch_free(a);
 251                                 }
 252
 253                                 if ( ent.e_dn && ( ent.e_dn != bdn.bv_val ) )
 254                                         free( ent.e_dn );
 255                                 if ( ent.e_ndn )
 256                                         free( ent.e_ndn );
 257                         }
 258                         ldap_msgfree(res);
 259                         if ( abort ) {
 260                                 ldap_abandon(lc->ld, msgid);
 261                                 goto finish;
 262                         }
 263
 264                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 265                         char            **references = NULL;
 266                         int             cnt;
 267
 268                         rc = ldap_parse_reference( lc->ld, res,
 269                                         &references, &rs->sr_ctrls, 1 );
 270
 271                         if ( rc != LDAP_SUCCESS ) {
 272                                 continue;
 273                         }
 274
 275                         if ( references == NULL ) {
 276                                 continue;
 277                         }
 278
 279                         for ( cnt = 0; references[ cnt ]; cnt++ )
 280                                 /* NO OP */ ;
 281
 282                         rs->sr_ref = ch_calloc( cnt + 1, sizeof( struct berval ) );
 283
 284                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 285                                 rs->sr_ref[ cnt ].bv_val = references[ cnt ];
 286                                 rs->sr_ref[ cnt ].bv_len = strlen( references[ cnt ] );
 287                         }
 288
 289                         /* ignore return value by now */
 290                         ( void )send_search_reference( op, rs );
 291
 292                         /* cleanup */
 293                         if ( references ) {
 294                                 ldap_value_free( references );
 295                                 ch_free( rs->sr_ref );
 296                                 rs->sr_ref = NULL;
 297                         }
 298
 299                         if ( rs->sr_ctrls ) {
 300                                 ldap_controls_free( rs->sr_ctrls );
 301                                 rs->sr_ctrls = NULL;
 302                         }
 303
 304                 } else {
 305                         rc = ldap_parse_result(lc->ld, res, &rs->sr_err,
 306                                         &match.bv_val, (char **)&rs->sr_text,
 307                                         NULL, NULL, 1);
 308                         if (rc != LDAP_SUCCESS ) rs->sr_err = rc;
 309                         rs->sr_err = ldap_back_map_result(rs);
 310                         rc = 0;
 311                         break;
 312                 }
 313         }
 314
 315         if (rc == -1)
 316                 goto fail;
 317
 318         /*
 319          * Rewrite the matched portion of the search base, if required
 320          */
 321         if ( match.bv_val && *match.bv_val ) {
 322                 struct berval mdn;
 323
 324 #ifdef ENABLE_REWRITE
 325                 dc.ctx = "matchedDn";
 326 #else
 327                 dc.tofrom = 0;
 328                 dc.normalized = 0;
 329 #endif
 330                 match.bv_len = strlen( match.bv_val );
 331                 ldap_back_dn_massage(&dc, &match, &mdn);
 332                 rs->sr_matched = mdn.bv_val;
 333         }
 334         if ( rs->sr_v2ref ) {
 335                 rs->sr_err = LDAP_REFERRAL;
 336         }
 337
 338 finish:;
 339         send_ldap_result( op, rs );
 340
 341 #ifdef LDAP_BACK_PROXY_AUTHZ
 342         if ( ctrls && ctrls != op->o_ctrls ) {
 343                 free( ctrls[ 0 ] );
 344                 free( ctrls );
 345         }
 346 #endif /* LDAP_BACK_PROXY_AUTHZ */
 347
 348         if ( match.bv_val ) {
 349                 if ( rs->sr_matched != match.bv_val ) {
 350                         free( (char *)rs->sr_matched );
 351                 }
 352                 rs->sr_matched = NULL;
 353                 LDAP_FREE( match.bv_val );
 354         }
 355         if ( rs->sr_text ) {
 356                 if ( !dontfreetext ) {
 357                         LDAP_FREE( (char *)rs->sr_text );
 358                 }
 359                 rs->sr_text = NULL;
 360         }
 361         if ( mapped_attrs ) {
 362                 ch_free( mapped_attrs );
 363         }
 364         if ( mfilter.bv_val != op->oq_search.rs_filterstr.bv_val ) {
 365                 ch_free( mfilter.bv_val );
 366         }
 367         if ( mbase.bv_val != op->o_req_dn.bv_val ) {
 368                 free( mbase.bv_val );
 369         }
 370
 371         return rc;
 372 }
 373
 374 static int
 375 ldap_build_entry(
 376         Operation *op,
 377         LDAPMessage *e,
 378         Entry *ent,
 379         struct berval *bdn,
 380         int flags
 381 )
 382 {
 383         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 384         struct berval a, mapped;
 385         BerElement ber = *e->lm_ber;
 386         Attribute *attr, **attrp;
 387         struct berval *bv;
 388         const char *text;
 389         int last;
 390         int private = flags & LDAP_BUILD_ENTRY_PRIVATE;
 391         int normalize = flags & LDAP_BUILD_ENTRY_NORMALIZE;
 392         dncookie dc;
 393
 394         /* safe assumptions ... */
 395         assert( ent );
 396         ent->e_bv.bv_val = NULL;
 397
 398         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 399                 return LDAP_DECODING_ERROR;
 400         }
 401
 402         /*
 403          * Rewrite the dn of the result, if needed
 404          */
 405         dc.rwmap = &li->rwmap;
 406 #ifdef ENABLE_REWRITE
 407         dc.conn = op->o_conn;
 408         dc.rs = NULL;
 409         dc.ctx = "searchResult";
 410 #else
 411         dc.tofrom = 0;
 412         dc.normalized = 0;
 413 #endif
 414         if ( ldap_back_dn_massage( &dc, bdn, &ent->e_name ) ) {
 415                 return LDAP_OTHER;
 416         }
 417
 418         /*
 419          * Note: this may fail if the target host(s) schema differs
 420          * from the one known to the meta, and a DN with unknown
 421          * attributes is returned.
 422          *
 423          * FIXME: should we log anything, or delegate to dnNormalize?
 424          */
 425         if ( dnNormalize( 0, NULL, NULL, &ent->e_name, &ent->e_nname,
 426                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 427         {
 428                 return LDAP_INVALID_DN_SYNTAX;
 429         }
 430
 431         attrp = &ent->e_attrs;
 432
 433 #ifdef ENABLE_REWRITE
 434         dc.ctx = "searchAttrDN";
 435 #endif
 436         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 437                 ldap_back_map(&li->rwmap.rwm_at, &a, &mapped, BACKLDAP_REMAP);
 438                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0')
 439                         continue;
 440                 attr = (Attribute *)ch_malloc( sizeof(Attribute) );
 441                 if (attr == NULL)
 442                         continue;
 443                 attr->a_flags = 0;
 444                 attr->a_next = 0;
 445                 attr->a_desc = NULL;
 446                 if (slap_bv2ad(&mapped, &attr->a_desc, &text) != LDAP_SUCCESS) {
 447                         if (slap_bv2undef_ad(&mapped, &attr->a_desc, &text)
 448                                         != LDAP_SUCCESS) {
 449 #ifdef NEW_LOGGING
 450                                 LDAP_LOG( BACK_LDAP, DETAIL1,
 451                                         "slap_bv2undef_ad(%s):  %s\n", mapped.bv_val, text, 0 );
 452 #else /* !NEW_LOGGING */
 453                                 Debug( LDAP_DEBUG_ANY,
 454                                                 "slap_bv2undef_ad(%s):  "
 455                                                 "%s\n%s", mapped.bv_val, text, "" );
 456 #endif /* !NEW_LOGGING */
 457                                 ch_free(attr);
 458                                 continue;
 459                         }
 460                 }
 461
 462                 /* no subschemaSubentry */
 463                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
 464
 465                         /*
 466                          * We eat target's subschemaSubentry because
 467                          * a search for this value is likely not
 468                          * to resolve to the appropriate backend;
 469                          * later, the local subschemaSubentry is
 470                          * added.
 471                          */
 472                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 473
 474                         ch_free(attr);
 475                         continue;
 476                 }
 477
 478                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 479                                 || attr->a_vals == NULL ) {
 480                         /*
 481                          * Note: attr->a_vals can be null when using
 482                          * values result filter
 483                          */
 484                         if (private) {
 485                                 attr->a_vals = &dummy;
 486                         } else {
 487                                 attr->a_vals = ch_malloc(sizeof(struct berval));
 488                                 attr->a_vals->bv_val = NULL;
 489                                 attr->a_vals->bv_len = 0;
 490                         }
 491                         last = 0;
 492                 } else {
 493                         for ( last = 0; attr->a_vals[last].bv_val; last++ );
 494                 }
 495                 if ( last == 0 ) {
 496                         /* empty */
 497                 } else if ( attr->a_desc == slap_schema.si_ad_objectClass
 498                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass ) {
 499                         for ( bv = attr->a_vals; bv->bv_val; bv++ ) {
 500                                 ldap_back_map(&li->rwmap.rwm_oc, bv, &mapped,
 501                                                 BACKLDAP_REMAP);
 502                                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
 503                                         LBER_FREE(bv->bv_val);
 504                                         bv->bv_val = NULL;
 505                                         if (--last < 0)
 506                                                 break;
 507                                         *bv = attr->a_vals[last];
 508                                         attr->a_vals[last].bv_val = NULL;
 509                                         bv--;
 510
 511                                 } else if ( mapped.bv_val != bv->bv_val ) {
 512                                         /*
 513                                          * FIXME: after LBER_FREEing
 514                                          * the value is replaced by
 515                                          * ch_alloc'ed memory
 516                                          */
 517                                         LBER_FREE(bv->bv_val);
 518                                         ber_dupbv( bv, &mapped );
 519                                 }
 520                         }
 521
 522                 /*
 523                  * It is necessary to try to rewrite attributes with
 524                  * dn syntax because they might be used in ACLs as
 525                  * members of groups; since ACLs are applied to the
 526                  * rewritten stuff, no dn-based subject clause could
 527                  * be used at the ldap backend side (see
 528                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 529                  * The problem can be overcome by moving the dn-based
 530                  * ACLs to the target directory server, and letting
 531                  * everything pass thru the ldap backend.
 532                  */
 533                 } else if ( attr->a_desc->ad_type->sat_syntax ==
 534                                 slap_schema.si_syn_distinguishedName ) {
 535                         ldap_dnattr_result_rewrite( &dc, attr->a_vals );
 536                 }
 537
 538                 if ( normalize && last && attr->a_desc->ad_type->sat_equality &&
 539                         attr->a_desc->ad_type->sat_equality->smr_normalize ) {
 540                         int i;
 541
 542                         attr->a_nvals = ch_malloc((last+1)*sizeof(struct berval));
 543                         for (i=0; i<last; i++) {
 544                                 attr->a_desc->ad_type->sat_equality->smr_normalize(
 545                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 546                                         attr->a_desc->ad_type->sat_syntax,
 547                                         attr->a_desc->ad_type->sat_equality,
 548                                         &attr->a_vals[i], &attr->a_nvals[i],
 549                                         NULL /* op->o_tmpmemctx */ );
 550                         }
 551                         attr->a_nvals[i].bv_val = NULL;
 552                         attr->a_nvals[i].bv_len = 0;
 553                 } else {
 554                         attr->a_nvals = attr->a_vals;
 555                 }
 556                 *attrp = attr;
 557                 attrp = &attr->a_next;
 558         }
 559
 560         /* make sure it's free'able */
 561         if (!private && ent->e_name.bv_val == bdn->bv_val)
 562                 ber_dupbv( &ent->e_name, bdn );
 563         return LDAP_SUCCESS;
 564 }
 565
 566 /* return 0 IFF we can retrieve the entry with ndn
 567  */
 568 int
 569 ldap_back_entry_get(
 570         Operation *op,
 571         struct berval   *ndn,
 572         ObjectClass *oc,
 573         AttributeDescription *at,
 574         int rw,
 575         Entry **ent
 576 )
 577 {
 578         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 579         struct ldapconn *lc;
 580         int rc = 1, is_oc;
 581         struct berval mapped = { 0, NULL }, bdn, mdn;
 582         LDAPMessage     *result = NULL, *e = NULL;
 583         char *gattr[3];
 584         char *filter = NULL;
 585         Connection *oconn;
 586         SlapReply rs;
 587         dncookie dc;
 588
 589         /* Tell getconn this is a privileged op */
 590         is_oc = op->o_do_not_cache;
 591         op->o_do_not_cache = 1;
 592         lc = ldap_back_getconn(op, &rs);
 593         oconn = op->o_conn;
 594         op->o_conn = NULL;
 595         if ( !lc || !ldap_back_dobind(lc, op, &rs) ) {
 596                 op->o_do_not_cache = is_oc;
 597                 op->o_conn = oconn;
 598                 return 1;
 599         }
 600         op->o_do_not_cache = is_oc;
 601         op->o_conn = oconn;
 602
 603         /*
 604          * Rewrite the search base, if required
 605          */
 606         dc.rwmap = &li->rwmap;
 607 #ifdef ENABLE_REWRITE
 608         dc.conn = op->o_conn;
 609         dc.rs = &rs;
 610         dc.ctx = "searchBase";
 611 #else
 612         dc.tofrom = 1;
 613         dc.normalized = 1;
 614 #endif
 615         if ( ldap_back_dn_massage( &dc, ndn, &mdn ) ) {
 616                 return 1;
 617         }
 618
 619         if ( at ) {
 620                 ldap_back_map(&li->rwmap.rwm_at, &at->ad_cname, &mapped, BACKLDAP_MAP);
 621                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
 622                         rc = 1;
 623                         goto cleanup;
 624                 }
 625         }
 626
 627         is_oc = (strcasecmp("objectclass", mapped.bv_val) == 0);
 628         if (oc && !is_oc) {
 629                 gattr[0] = "objectclass";
 630                 gattr[1] = mapped.bv_val;
 631                 gattr[2] = NULL;
 632         } else {
 633                 gattr[0] = mapped.bv_val;
 634                 gattr[1] = NULL;
 635         }
 636         if (oc) {
 637                 char *ptr;
 638                 ldap_back_map(&li->rwmap.rwm_oc, &oc->soc_cname, &mapped,
 639                                                 BACKLDAP_MAP);
 640                 filter = ch_malloc(sizeof("(objectclass=)") + mapped.bv_len);
 641                 ptr = lutil_strcopy(filter, "(objectclass=");
 642                 ptr = lutil_strcopy(ptr, mapped.bv_val);
 643                 *ptr++ = ')';
 644                 *ptr++ = '\0';
 645         }
 646
 647         if (ldap_search_ext_s(lc->ld, mdn.bv_val, LDAP_SCOPE_BASE, filter,
 648                                 gattr, 0, NULL, NULL, LDAP_NO_LIMIT,
 649                                 LDAP_NO_LIMIT, &result) != LDAP_SUCCESS)
 650         {
 651                 goto cleanup;
 652         }
 653
 654         if ((e = ldap_first_entry(lc->ld, result)) == NULL) {
 655                 goto cleanup;
 656         }
 657
 658         *ent = ch_calloc(1,sizeof(Entry));
 659
 660         rc = ldap_build_entry(op, e, *ent, &bdn, LDAP_BUILD_ENTRY_NORMALIZE);
 661
 662         if (rc != LDAP_SUCCESS) {
 663                 ch_free(*ent);
 664                 *ent = NULL;
 665         }
 666
 667 cleanup:
 668         if (result) {
 669                 ldap_msgfree(result);
 670         }
 671
 672         if ( filter ) {
 673                 ch_free( filter );
 674         }
 675
 676         if ( mdn.bv_val != ndn->bv_val ) {
 677                 ch_free( mdn.bv_val );
 678         }
 679
 680         return(rc);
 681 }
 682