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 = BER_BVNULL;
  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 = BER_BVNULL;
  58         char **mapped_attrs = NULL;
  59         struct berval mbase;
  60         struct berval mfilter = BER_BVNULL;
  61         int dontfreetext = 0;
  62         dncookie dc;
  63         LDAPControl **ctrls = NULL;
  64
  65         lc = ldap_back_getconn(op, rs);
  66         if ( !lc ) {
  67                 return( -1 );
  68         }
  69
  70         /*
  71          * FIXME: in case of values return filter, we might want
  72          * to map attrs and maybe rewrite value
  73          */
  74         if ( !ldap_back_dobind( lc, op, rs ) ) {
  75                 return( -1 );
  76         }
  77
  78         /* should we check return values? */
  79         if (op->ors_deref != -1)
  80                 ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&op->ors_deref);
  81         if (op->ors_tlimit != -1) {
  82                 tv.tv_sec = op->ors_tlimit;
  83                 tv.tv_usec = 0;
  84         } else {
  85                 tv.tv_sec = 0;
  86         }
  87
  88         /*
  89          * Rewrite the search base, if required
  90          */
  91         dc.rwmap = &li->rwmap;
  92 #ifdef ENABLE_REWRITE
  93         dc.conn = op->o_conn;
  94         dc.rs = rs;
  95         dc.ctx = "searchBase";
  96 #else
  97         dc.tofrom = 1;
  98         dc.normalized = 0;
  99 #endif
 100         if ( ldap_back_dn_massage( &dc, &op->o_req_ndn, &mbase ) ) {
 101                 send_ldap_result( op, rs );
 102                 return -1;
 103         }
 104
 105         rc = ldap_back_filter_map_rewrite( &dc, op->ors_filter,
 106                         &mfilter, BACKLDAP_MAP );
 107
 108         switch ( rc ) {
 109         case LDAP_SUCCESS:
 110                 break;
 111
 112         case LDAP_COMPARE_FALSE:
 113                 rs->sr_err = LDAP_SUCCESS;
 114                 rs->sr_text = NULL;
 115                 rc = 0;
 116                 goto finish;
 117
 118         default:
 119                 rs->sr_err = LDAP_OTHER;
 120                 rs->sr_text = "Rewrite error";
 121                 dontfreetext = 1;
 122                 rc = -1;
 123                 goto finish;
 124         }
 125
 126         rs->sr_err = ldap_back_map_attrs( &li->rwmap.rwm_at,
 127                         op->ors_attrs,
 128                         BACKLDAP_MAP, &mapped_attrs );
 129         if ( rs->sr_err ) {
 130                 rc = -1;
 131                 goto finish;
 132         }
 133
 134         ctrls = op->o_ctrls;
 135 #ifdef LDAP_BACK_PROXY_AUTHZ
 136         rc = ldap_back_proxy_authz_ctrl( lc, op, rs, &ctrls );
 137         if ( rc != LDAP_SUCCESS ) {
 138                 dontfreetext = 1;
 139                 goto finish;
 140         }
 141 #endif /* LDAP_BACK_PROXY_AUTHZ */
 142
 143         rs->sr_err = ldap_search_ext(lc->ld, mbase.bv_val,
 144                         op->ors_scope, mfilter.bv_val,
 145                         mapped_attrs, op->ors_attrsonly,
 146                         ctrls, NULL,
 147                         tv.tv_sec ? &tv : NULL, op->ors_slimit,
 148                         &msgid );
 149
 150         if ( rs->sr_err != LDAP_SUCCESS ) {
 151 fail:;
 152                 rc = ldap_back_op_result(lc, op, rs, msgid, 0);
 153                 goto finish;
 154         }
 155
 156         /* We pull apart the ber result, stuff it into a slapd entry, and
 157          * let send_search_entry stuff it back into ber format. Slow & ugly,
 158          * but this is necessary for version matching, and for ACL processing.
 159          */
 160
 161         for ( rc=0; rc != -1; rc = ldap_result(lc->ld, msgid, 0, &tv, &res))
 162         {
 163                 /* check for abandon */
 164                 if (op->o_abandon) {
 165                         ldap_abandon(lc->ld, msgid);
 166                         rc = 0;
 167                         goto finish;
 168                 }
 169
 170                 if (rc == 0) {
 171                         tv.tv_sec = 0;
 172                         tv.tv_usec = 100000;
 173                         ldap_pvt_thread_yield();
 174
 175                 } else if (rc == LDAP_RES_SEARCH_ENTRY) {
 176                         Entry ent = {0};
 177                         struct berval bdn;
 178                         int abort = 0;
 179                         e = ldap_first_entry(lc->ld,res);
 180                         if ( ( rc = ldap_build_entry(op, e, &ent, &bdn,
 181                                                 LDAP_BUILD_ENTRY_PRIVATE)) == LDAP_SUCCESS ) {
 182                                 rs->sr_entry = &ent;
 183                                 rs->sr_attrs = op->ors_attrs;
 184                                 rs->sr_flags = 0;
 185                                 abort = send_search_entry( op, rs );
 186                                 while (ent.e_attrs) {
 187                                         Attribute *a;
 188                                         BerVarray v;
 189
 190                                         a = ent.e_attrs;
 191                                         ent.e_attrs = a->a_next;
 192
 193                                         v = a->a_vals;
 194                                         if (a->a_vals != &dummy)
 195                                                 ber_bvarray_free(a->a_vals);
 196                                         if (a->a_nvals != v)
 197                                                 ber_bvarray_free(a->a_nvals);
 198                                         ch_free(a);
 199                                 }
 200
 201                                 if ( ent.e_dn && ( ent.e_dn != bdn.bv_val ) )
 202                                         free( ent.e_dn );
 203                                 if ( ent.e_ndn )
 204                                         free( ent.e_ndn );
 205                         }
 206                         ldap_msgfree(res);
 207                         if ( abort ) {
 208                                 ldap_abandon(lc->ld, msgid);
 209                                 goto finish;
 210                         }
 211
 212                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 213                         char            **references = NULL;
 214                         int             cnt;
 215
 216                         rc = ldap_parse_reference( lc->ld, res,
 217                                         &references, &rs->sr_ctrls, 1 );
 218
 219                         if ( rc != LDAP_SUCCESS ) {
 220                                 continue;
 221                         }
 222
 223                         if ( references == NULL ) {
 224                                 continue;
 225                         }
 226
 227                         for ( cnt = 0; references[ cnt ]; cnt++ )
 228                                 /* NO OP */ ;
 229
 230                         rs->sr_ref = ch_calloc( cnt + 1, sizeof( struct berval ) );
 231
 232                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 233                                 rs->sr_ref[ cnt ].bv_val = references[ cnt ];
 234                                 rs->sr_ref[ cnt ].bv_len = strlen( references[ cnt ] );
 235                         }
 236
 237                         /* ignore return value by now */
 238                         ( void )send_search_reference( op, rs );
 239
 240                         /* cleanup */
 241                         if ( references ) {
 242                                 ldap_value_free( references );
 243                                 ch_free( rs->sr_ref );
 244                                 rs->sr_ref = NULL;
 245                         }
 246
 247                         if ( rs->sr_ctrls ) {
 248                                 ldap_controls_free( rs->sr_ctrls );
 249                                 rs->sr_ctrls = NULL;
 250                         }
 251
 252                 } else {
 253                         rc = ldap_parse_result(lc->ld, res, &rs->sr_err,
 254                                         &match.bv_val, (char **)&rs->sr_text,
 255                                         NULL, NULL, 1);
 256                         if (rc != LDAP_SUCCESS ) rs->sr_err = rc;
 257                         rs->sr_err = slap_map_api2result( rs );
 258                         rc = 0;
 259                         break;
 260                 }
 261         }
 262
 263         if (rc == -1)
 264                 goto fail;
 265
 266         /*
 267          * Rewrite the matched portion of the search base, if required
 268          */
 269         if ( match.bv_val && *match.bv_val ) {
 270                 struct berval mdn;
 271
 272 #ifdef ENABLE_REWRITE
 273                 dc.ctx = "matchedDN";
 274 #else
 275                 dc.tofrom = 0;
 276                 dc.normalized = 0;
 277 #endif
 278                 match.bv_len = strlen( match.bv_val );
 279                 ldap_back_dn_massage(&dc, &match, &mdn);
 280                 rs->sr_matched = mdn.bv_val;
 281         }
 282         if ( rs->sr_v2ref ) {
 283                 rs->sr_err = LDAP_REFERRAL;
 284         }
 285
 286 finish:;
 287         send_ldap_result( op, rs );
 288
 289 #ifdef LDAP_BACK_PROXY_AUTHZ
 290         if ( ctrls && ctrls != op->o_ctrls ) {
 291                 free( ctrls[ 0 ] );
 292                 free( ctrls );
 293         }
 294 #endif /* LDAP_BACK_PROXY_AUTHZ */
 295
 296         if ( match.bv_val ) {
 297                 if ( rs->sr_matched != match.bv_val ) {
 298                         free( (char *)rs->sr_matched );
 299                 }
 300                 rs->sr_matched = NULL;
 301                 LDAP_FREE( match.bv_val );
 302         }
 303         if ( rs->sr_text ) {
 304                 if ( !dontfreetext ) {
 305                         LDAP_FREE( (char *)rs->sr_text );
 306                 }
 307                 rs->sr_text = NULL;
 308         }
 309         if ( mapped_attrs ) {
 310                 ch_free( mapped_attrs );
 311         }
 312         if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
 313                 ch_free( mfilter.bv_val );
 314         }
 315         if ( mbase.bv_val != op->o_req_ndn.bv_val ) {
 316                 free( mbase.bv_val );
 317         }
 318
 319         return rc;
 320 }
 321
 322 static int
 323 ldap_build_entry(
 324         Operation *op,
 325         LDAPMessage *e,
 326         Entry *ent,
 327         struct berval *bdn,
 328         int flags
 329 )
 330 {
 331         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 332         struct berval a, mapped;
 333         BerElement ber = *e->lm_ber;
 334         Attribute *attr, **attrp;
 335         struct berval *bv;
 336         const char *text;
 337         int last;
 338         int private = flags & LDAP_BUILD_ENTRY_PRIVATE;
 339         int normalize = flags & LDAP_BUILD_ENTRY_NORMALIZE;
 340         dncookie dc;
 341
 342         /* safe assumptions ... */
 343         assert( ent );
 344         ent->e_bv.bv_val = NULL;
 345
 346         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 347                 return LDAP_DECODING_ERROR;
 348         }
 349
 350         /*
 351          * Rewrite the dn of the result, if needed
 352          */
 353         dc.rwmap = &li->rwmap;
 354 #ifdef ENABLE_REWRITE
 355         dc.conn = op->o_conn;
 356         dc.rs = NULL;
 357         dc.ctx = "searchResult";
 358 #else
 359         dc.tofrom = 0;
 360         dc.normalized = 0;
 361 #endif
 362         if ( ldap_back_dn_massage( &dc, bdn, &ent->e_name ) ) {
 363                 return LDAP_OTHER;
 364         }
 365
 366         /*
 367          * Note: this may fail if the target host(s) schema differs
 368          * from the one known to the meta, and a DN with unknown
 369          * attributes is returned.
 370          *
 371          * FIXME: should we log anything, or delegate to dnNormalize?
 372          */
 373         if ( dnNormalize( 0, NULL, NULL, &ent->e_name, &ent->e_nname,
 374                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 375         {
 376                 return LDAP_INVALID_DN_SYNTAX;
 377         }
 378
 379         attrp = &ent->e_attrs;
 380
 381 #ifdef ENABLE_REWRITE
 382         dc.ctx = "searchAttrDN";
 383 #endif
 384         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 385                 ldap_back_map(&li->rwmap.rwm_at, &a, &mapped, BACKLDAP_REMAP);
 386                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0')
 387                         continue;
 388                 attr = (Attribute *)ch_malloc( sizeof(Attribute) );
 389                 if (attr == NULL)
 390                         continue;
 391                 attr->a_flags = 0;
 392                 attr->a_next = 0;
 393                 attr->a_desc = NULL;
 394                 if (slap_bv2ad(&mapped, &attr->a_desc, &text) != LDAP_SUCCESS) {
 395                         if (slap_bv2undef_ad(&mapped, &attr->a_desc, &text)
 396                                         != LDAP_SUCCESS) {
 397 #ifdef NEW_LOGGING
 398                                 LDAP_LOG( BACK_LDAP, DETAIL1,
 399                                         "slap_bv2undef_ad(%s):  %s\n", mapped.bv_val, text, 0 );
 400 #else /* !NEW_LOGGING */
 401                                 Debug( LDAP_DEBUG_ANY,
 402                                                 "slap_bv2undef_ad(%s):  "
 403                                                 "%s\n%s", mapped.bv_val, text, "" );
 404 #endif /* !NEW_LOGGING */
 405                                 ch_free(attr);
 406                                 continue;
 407                         }
 408                 }
 409
 410                 /* no subschemaSubentry */
 411                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
 412
 413                         /*
 414                          * We eat target's subschemaSubentry because
 415                          * a search for this value is likely not
 416                          * to resolve to the appropriate backend;
 417                          * later, the local subschemaSubentry is
 418                          * added.
 419                          */
 420                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 421
 422                         ch_free(attr);
 423                         continue;
 424                 }
 425
 426                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 427                                 || attr->a_vals == NULL ) {
 428                         /*
 429                          * Note: attr->a_vals can be null when using
 430                          * values result filter
 431                          */
 432                         if (private) {
 433                                 attr->a_vals = &dummy;
 434                         } else {
 435                                 attr->a_vals = ch_malloc(sizeof(struct berval));
 436                                 attr->a_vals->bv_val = NULL;
 437                                 attr->a_vals->bv_len = 0;
 438                         }
 439                         last = 0;
 440                 } else {
 441                         for ( last = 0; attr->a_vals[last].bv_val; last++ );
 442                 }
 443                 if ( last == 0 ) {
 444                         /* empty */
 445                 } else if ( attr->a_desc == slap_schema.si_ad_objectClass
 446                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass ) {
 447                         for ( bv = attr->a_vals; bv->bv_val; bv++ ) {
 448                                 ldap_back_map(&li->rwmap.rwm_oc, bv, &mapped,
 449                                                 BACKLDAP_REMAP);
 450                                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
 451                                         LBER_FREE(bv->bv_val);
 452                                         bv->bv_val = NULL;
 453                                         if (--last < 0)
 454                                                 break;
 455                                         *bv = attr->a_vals[last];
 456                                         attr->a_vals[last].bv_val = NULL;
 457                                         bv--;
 458
 459                                 } else if ( mapped.bv_val != bv->bv_val ) {
 460                                         /*
 461                                          * FIXME: after LBER_FREEing
 462                                          * the value is replaced by
 463                                          * ch_alloc'ed memory
 464                                          */
 465                                         LBER_FREE(bv->bv_val);
 466                                         ber_dupbv( bv, &mapped );
 467                                 }
 468                         }
 469
 470                 /*
 471                  * It is necessary to try to rewrite attributes with
 472                  * dn syntax because they might be used in ACLs as
 473                  * members of groups; since ACLs are applied to the
 474                  * rewritten stuff, no dn-based subject clause could
 475                  * be used at the ldap backend side (see
 476                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 477                  * The problem can be overcome by moving the dn-based
 478                  * ACLs to the target directory server, and letting
 479                  * everything pass thru the ldap backend.
 480                  */
 481                 } else if ( attr->a_desc->ad_type->sat_syntax ==
 482                                 slap_schema.si_syn_distinguishedName ) {
 483                         ldap_dnattr_result_rewrite( &dc, attr->a_vals );
 484                 }
 485
 486                 if ( normalize && last && attr->a_desc->ad_type->sat_equality &&
 487                         attr->a_desc->ad_type->sat_equality->smr_normalize ) {
 488                         int i;
 489
 490                         attr->a_nvals = ch_malloc((last+1)*sizeof(struct berval));
 491                         for (i=0; i<last; i++) {
 492                                 attr->a_desc->ad_type->sat_equality->smr_normalize(
 493                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 494                                         attr->a_desc->ad_type->sat_syntax,
 495                                         attr->a_desc->ad_type->sat_equality,
 496                                         &attr->a_vals[i], &attr->a_nvals[i],
 497                                         NULL /* op->o_tmpmemctx */ );
 498                         }
 499                         attr->a_nvals[i].bv_val = NULL;
 500                         attr->a_nvals[i].bv_len = 0;
 501                 } else {
 502                         attr->a_nvals = attr->a_vals;
 503                 }
 504                 *attrp = attr;
 505                 attrp = &attr->a_next;
 506         }
 507
 508         /* make sure it's free'able */
 509         if (!private && ent->e_name.bv_val == bdn->bv_val)
 510                 ber_dupbv( &ent->e_name, bdn );
 511         return LDAP_SUCCESS;
 512 }
 513
 514 /* return 0 IFF we can retrieve the entry with ndn
 515  */
 516 int
 517 ldap_back_entry_get(
 518         Operation *op,
 519         struct berval   *ndn,
 520         ObjectClass *oc,
 521         AttributeDescription *at,
 522         int rw,
 523         Entry **ent
 524 )
 525 {
 526         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 527         struct ldapconn *lc;
 528         int rc = 1, is_oc;
 529         struct berval mapped = BER_BVNULL, bdn, mdn;
 530         LDAPMessage     *result = NULL, *e = NULL;
 531         char *gattr[3];
 532         char *filter = NULL;
 533         Connection *oconn;
 534         SlapReply rs;
 535         dncookie dc;
 536
 537         /* Tell getconn this is a privileged op */
 538         is_oc = op->o_do_not_cache;
 539         op->o_do_not_cache = 1;
 540         lc = ldap_back_getconn(op, &rs);
 541         oconn = op->o_conn;
 542         op->o_conn = NULL;
 543         if ( !lc || !ldap_back_dobind(lc, op, &rs) ) {
 544                 op->o_do_not_cache = is_oc;
 545                 op->o_conn = oconn;
 546                 return 1;
 547         }
 548         op->o_do_not_cache = is_oc;
 549         op->o_conn = oconn;
 550
 551         /*
 552          * Rewrite the search base, if required
 553          */
 554         dc.rwmap = &li->rwmap;
 555 #ifdef ENABLE_REWRITE
 556         dc.conn = op->o_conn;
 557         dc.rs = &rs;
 558         dc.ctx = "searchBase";
 559 #else
 560         dc.tofrom = 1;
 561         dc.normalized = 1;
 562 #endif
 563         if ( ldap_back_dn_massage( &dc, ndn, &mdn ) ) {
 564                 return 1;
 565         }
 566
 567         if ( at ) {
 568                 ldap_back_map(&li->rwmap.rwm_at, &at->ad_cname, &mapped, BACKLDAP_MAP);
 569                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
 570                         rc = 1;
 571                         goto cleanup;
 572                 }
 573         }
 574
 575         is_oc = (strcasecmp("objectclass", mapped.bv_val) == 0);
 576         if (oc && !is_oc) {
 577                 gattr[0] = "objectclass";
 578                 gattr[1] = mapped.bv_val;
 579                 gattr[2] = NULL;
 580         } else {
 581                 gattr[0] = mapped.bv_val;
 582                 gattr[1] = NULL;
 583         }
 584         if (oc) {
 585                 char *ptr;
 586                 ldap_back_map(&li->rwmap.rwm_oc, &oc->soc_cname, &mapped,
 587                                                 BACKLDAP_MAP);
 588                 filter = ch_malloc(sizeof("(objectclass=)") + mapped.bv_len);
 589                 ptr = lutil_strcopy(filter, "(objectclass=");
 590                 ptr = lutil_strcopy(ptr, mapped.bv_val);
 591                 *ptr++ = ')';
 592                 *ptr++ = '\0';
 593         }
 594
 595         if (ldap_search_ext_s(lc->ld, mdn.bv_val, LDAP_SCOPE_BASE, filter,
 596                                 gattr, 0, NULL, NULL, LDAP_NO_LIMIT,
 597                                 LDAP_NO_LIMIT, &result) != LDAP_SUCCESS)
 598         {
 599                 goto cleanup;
 600         }
 601
 602         if ((e = ldap_first_entry(lc->ld, result)) == NULL) {
 603                 goto cleanup;
 604         }
 605
 606         *ent = ch_calloc(1,sizeof(Entry));
 607
 608         rc = ldap_build_entry(op, e, *ent, &bdn, LDAP_BUILD_ENTRY_NORMALIZE);
 609
 610         if (rc != LDAP_SUCCESS) {
 611                 ch_free(*ent);
 612                 *ent = NULL;
 613         }
 614
 615 cleanup:
 616         if (result) {
 617                 ldap_msgfree(result);
 618         }
 619
 620         if ( filter ) {
 621                 ch_free( filter );
 622         }
 623
 624         if ( mdn.bv_val != ndn->bv_val ) {
 625                 ch_free( mdn.bv_val );
 626         }
 627
 628         return(rc);
 629 }
 630