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
  44 static struct berval dummy = BER_BVNULL;
  45
  46 int
  47 ldap_back_search(
  48     Operation   *op,
  49     SlapReply *rs )
  50 {
  51         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
  52         struct ldapconn *lc;
  53         struct timeval  tv;
  54         LDAPMessage             *res, *e;
  55         int     rc = 0, msgid;
  56         struct berval match = BER_BVNULL;
  57         char **mapped_attrs = NULL;
  58         struct berval mbase;
  59         struct berval mfilter = BER_BVNULL;
  60         int dontfreetext = 0;
  61         dncookie dc;
  62         LDAPControl **ctrls = NULL;
  63
  64         lc = ldap_back_getconn(op, rs);
  65         if ( !lc ) {
  66                 return( -1 );
  67         }
  68
  69         /*
  70          * FIXME: in case of values return filter, we might want
  71          * to map attrs and maybe rewrite value
  72          */
  73         if ( !ldap_back_dobind( lc, op, rs ) ) {
  74                 return( -1 );
  75         }
  76
  77         /* should we check return values? */
  78         if (op->ors_deref != -1)
  79                 ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&op->ors_deref);
  80         if (op->ors_tlimit != -1) {
  81                 tv.tv_sec = op->ors_tlimit;
  82                 tv.tv_usec = 0;
  83         } else {
  84                 tv.tv_sec = 0;
  85         }
  86
  87         /*
  88          * Rewrite the search base, if required
  89          */
  90         dc.rwmap = &li->rwmap;
  91 #ifdef ENABLE_REWRITE
  92         dc.conn = op->o_conn;
  93         dc.rs = rs;
  94         dc.ctx = "searchBase";
  95 #else
  96         dc.tofrom = 1;
  97         dc.normalized = 0;
  98 #endif
  99         if ( ldap_back_dn_massage( &dc, &op->o_req_ndn, &mbase ) ) {
 100                 send_ldap_result( op, rs );
 101                 return -1;
 102         }
 103
 104         rc = ldap_back_filter_map_rewrite( &dc, op->ors_filter,
 105                         &mfilter, BACKLDAP_MAP );
 106
 107         switch ( rc ) {
 108         case LDAP_SUCCESS:
 109                 break;
 110
 111         case LDAP_COMPARE_FALSE:
 112                 rs->sr_err = LDAP_SUCCESS;
 113                 rs->sr_text = NULL;
 114                 rc = 0;
 115                 goto finish;
 116
 117         default:
 118                 rs->sr_err = LDAP_OTHER;
 119                 rs->sr_text = "Rewrite error";
 120                 dontfreetext = 1;
 121                 rc = -1;
 122                 goto finish;
 123         }
 124
 125         rs->sr_err = ldap_back_map_attrs( &li->rwmap.rwm_at,
 126                         op->ors_attrs,
 127                         BACKLDAP_MAP, &mapped_attrs );
 128         if ( rs->sr_err ) {
 129                 rc = -1;
 130                 goto finish;
 131         }
 132
 133         ctrls = op->o_ctrls;
 134 #ifdef LDAP_BACK_PROXY_AUTHZ
 135         rc = ldap_back_proxy_authz_ctrl( lc, op, rs, &ctrls );
 136         if ( rc != LDAP_SUCCESS ) {
 137                 dontfreetext = 1;
 138                 goto finish;
 139         }
 140 #endif /* LDAP_BACK_PROXY_AUTHZ */
 141
 142         rs->sr_err = ldap_search_ext(lc->ld, mbase.bv_val,
 143                         op->ors_scope, mfilter.bv_val,
 144                         mapped_attrs, op->ors_attrsonly,
 145                         ctrls, NULL,
 146                         tv.tv_sec ? &tv : NULL, op->ors_slimit,
 147                         &msgid );
 148
 149         if ( rs->sr_err != LDAP_SUCCESS ) {
 150 fail:;
 151                 rc = ldap_back_op_result(lc, op, rs, msgid, 0);
 152                 goto finish;
 153         }
 154
 155         /* We pull apart the ber result, stuff it into a slapd entry, and
 156          * let send_search_entry stuff it back into ber format. Slow & ugly,
 157          * but this is necessary for version matching, and for ACL processing.
 158          */
 159
 160         for ( rc=0; rc != -1; rc = ldap_result(lc->ld, msgid, 0, &tv, &res))
 161         {
 162                 /* check for abandon */
 163                 if (op->o_abandon) {
 164                         ldap_abandon(lc->ld, msgid);
 165                         rc = 0;
 166                         goto finish;
 167                 }
 168
 169                 if (rc == 0) {
 170                         tv.tv_sec = 0;
 171                         tv.tv_usec = 100000;
 172                         ldap_pvt_thread_yield();
 173
 174                 } else if (rc == LDAP_RES_SEARCH_ENTRY) {
 175                         Entry ent = {0};
 176                         struct berval bdn;
 177                         int abort = 0;
 178                         e = ldap_first_entry(lc->ld,res);
 179                         if ( ( rc = ldap_build_entry(op, e, &ent, &bdn,
 180                                                 LDAP_BUILD_ENTRY_PRIVATE)) == LDAP_SUCCESS ) {
 181                                 rs->sr_entry = &ent;
 182                                 rs->sr_attrs = op->ors_attrs;
 183                                 rs->sr_flags = 0;
 184                                 abort = send_search_entry( op, rs );
 185                                 while (ent.e_attrs) {
 186                                         Attribute *a;
 187                                         BerVarray v;
 188
 189                                         a = ent.e_attrs;
 190                                         ent.e_attrs = a->a_next;
 191
 192                                         v = a->a_vals;
 193                                         if (a->a_vals != &dummy)
 194                                                 ber_bvarray_free(a->a_vals);
 195                                         if (a->a_nvals != v)
 196                                                 ber_bvarray_free(a->a_nvals);
 197                                         ch_free(a);
 198                                 }
 199
 200                                 if ( ent.e_dn && ( ent.e_dn != bdn.bv_val ) )
 201                                         free( ent.e_dn );
 202                                 if ( ent.e_ndn )
 203                                         free( ent.e_ndn );
 204                         }
 205                         ldap_msgfree(res);
 206                         if ( abort ) {
 207                                 ldap_abandon(lc->ld, msgid);
 208                                 goto finish;
 209                         }
 210
 211                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 212                         char            **references = NULL;
 213                         int             cnt;
 214
 215                         rc = ldap_parse_reference( lc->ld, res,
 216                                         &references, &rs->sr_ctrls, 1 );
 217
 218                         if ( rc != LDAP_SUCCESS ) {
 219                                 continue;
 220                         }
 221
 222                         if ( references == NULL ) {
 223                                 continue;
 224                         }
 225
 226                         for ( cnt = 0; references[ cnt ]; cnt++ )
 227                                 /* NO OP */ ;
 228
 229                         rs->sr_ref = ch_calloc( cnt + 1, sizeof( struct berval ) );
 230
 231                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 232                                 rs->sr_ref[ cnt ].bv_val = references[ cnt ];
 233                                 rs->sr_ref[ cnt ].bv_len = strlen( references[ cnt ] );
 234                         }
 235
 236                         /* ignore return value by now */
 237                         ( void )send_search_reference( op, rs );
 238
 239                         /* cleanup */
 240                         if ( references ) {
 241                                 ldap_value_free( references );
 242                                 ch_free( rs->sr_ref );
 243                                 rs->sr_ref = NULL;
 244                         }
 245
 246                         if ( rs->sr_ctrls ) {
 247                                 ldap_controls_free( rs->sr_ctrls );
 248                                 rs->sr_ctrls = NULL;
 249                         }
 250
 251                 } else {
 252                         rc = ldap_parse_result(lc->ld, res, &rs->sr_err,
 253                                         &match.bv_val, (char **)&rs->sr_text,
 254                                         NULL, NULL, 1);
 255                         if (rc != LDAP_SUCCESS ) rs->sr_err = rc;
 256                         rs->sr_err = slap_map_api2result( rs );
 257                         rc = 0;
 258                         break;
 259                 }
 260         }
 261
 262         if (rc == -1)
 263                 goto fail;
 264
 265         /*
 266          * Rewrite the matched portion of the search base, if required
 267          */
 268         if ( match.bv_val && *match.bv_val ) {
 269                 struct berval mdn;
 270
 271 #ifdef ENABLE_REWRITE
 272                 dc.ctx = "matchedDN";
 273 #else
 274                 dc.tofrom = 0;
 275                 dc.normalized = 0;
 276 #endif
 277                 match.bv_len = strlen( match.bv_val );
 278                 ldap_back_dn_massage(&dc, &match, &mdn);
 279                 rs->sr_matched = mdn.bv_val;
 280         }
 281         if ( rs->sr_v2ref ) {
 282                 rs->sr_err = LDAP_REFERRAL;
 283         }
 284
 285 finish:;
 286         send_ldap_result( op, rs );
 287
 288 #ifdef LDAP_BACK_PROXY_AUTHZ
 289         if ( ctrls && ctrls != op->o_ctrls ) {
 290                 free( ctrls[ 0 ] );
 291                 free( ctrls );
 292         }
 293 #endif /* LDAP_BACK_PROXY_AUTHZ */
 294
 295         if ( match.bv_val ) {
 296                 if ( rs->sr_matched != match.bv_val ) {
 297                         free( (char *)rs->sr_matched );
 298                 }
 299                 rs->sr_matched = NULL;
 300                 LDAP_FREE( match.bv_val );
 301         }
 302         if ( rs->sr_text ) {
 303                 if ( !dontfreetext ) {
 304                         LDAP_FREE( (char *)rs->sr_text );
 305                 }
 306                 rs->sr_text = NULL;
 307         }
 308         if ( mapped_attrs ) {
 309                 ch_free( mapped_attrs );
 310         }
 311         if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
 312                 ch_free( mfilter.bv_val );
 313         }
 314         if ( mbase.bv_val != op->o_req_ndn.bv_val ) {
 315                 free( mbase.bv_val );
 316         }
 317
 318         return rc;
 319 }
 320
 321 static int
 322 ldap_build_entry(
 323         Operation *op,
 324         LDAPMessage *e,
 325         Entry *ent,
 326         struct berval *bdn,
 327         int flags
 328 )
 329 {
 330         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 331         struct berval a, mapped;
 332         BerElement ber = *e->lm_ber;
 333         Attribute *attr, **attrp;
 334         struct berval *bv;
 335         const char *text;
 336         int last;
 337         int private = flags & LDAP_BUILD_ENTRY_PRIVATE;
 338         dncookie dc;
 339
 340         /* safe assumptions ... */
 341         assert( ent );
 342         ent->e_bv.bv_val = NULL;
 343
 344         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 345                 return LDAP_DECODING_ERROR;
 346         }
 347
 348         /*
 349          * Rewrite the dn of the result, if needed
 350          */
 351         dc.rwmap = &li->rwmap;
 352 #ifdef ENABLE_REWRITE
 353         dc.conn = op->o_conn;
 354         dc.rs = NULL;
 355         dc.ctx = "searchResult";
 356 #else
 357         dc.tofrom = 0;
 358         dc.normalized = 0;
 359 #endif
 360         if ( ldap_back_dn_massage( &dc, bdn, &ent->e_name ) ) {
 361                 return LDAP_OTHER;
 362         }
 363
 364         /*
 365          * Note: this may fail if the target host(s) schema differs
 366          * from the one known to the meta, and a DN with unknown
 367          * attributes is returned.
 368          *
 369          * FIXME: should we log anything, or delegate to dnNormalize?
 370          */
 371         /* Note: if the distinguished values or the naming attributes
 372          * change, should we massage them as well?
 373          */
 374         if ( dnNormalize( 0, NULL, NULL, &ent->e_name, &ent->e_nname,
 375                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 376         {
 377                 return LDAP_INVALID_DN_SYNTAX;
 378         }
 379
 380         attrp = &ent->e_attrs;
 381
 382 #ifdef ENABLE_REWRITE
 383         dc.ctx = "searchAttrDN";
 384 #endif
 385         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 386                 ldap_back_map(&li->rwmap.rwm_at, &a, &mapped, BACKLDAP_REMAP);
 387                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0')
 388                         continue;
 389                 attr = (Attribute *)ch_malloc( sizeof(Attribute) );
 390                 if (attr == NULL)
 391                         continue;
 392                 attr->a_flags = 0;
 393                 attr->a_next = 0;
 394                 attr->a_desc = NULL;
 395                 if (slap_bv2ad(&mapped, &attr->a_desc, &text) != LDAP_SUCCESS) {
 396                         if (slap_bv2undef_ad(&mapped, &attr->a_desc, &text)
 397                                         != LDAP_SUCCESS) {
 398 #ifdef NEW_LOGGING
 399                                 LDAP_LOG( BACK_LDAP, DETAIL1,
 400                                         "slap_bv2undef_ad(%s):  %s\n", mapped.bv_val, text, 0 );
 401 #else /* !NEW_LOGGING */
 402                                 Debug( LDAP_DEBUG_ANY,
 403                                                 "slap_bv2undef_ad(%s):  "
 404                                                 "%s\n%s", mapped.bv_val, text, "" );
 405 #endif /* !NEW_LOGGING */
 406                                 ch_free(attr);
 407                                 continue;
 408                         }
 409                 }
 410
 411                 /* no subschemaSubentry */
 412                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
 413
 414                         /*
 415                          * We eat target's subschemaSubentry because
 416                          * a search for this value is likely not
 417                          * to resolve to the appropriate backend;
 418                          * later, the local subschemaSubentry is
 419                          * added.
 420                          */
 421                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 422
 423                         ch_free(attr);
 424                         continue;
 425                 }
 426
 427                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 428                                 || attr->a_vals == NULL ) {
 429                         /*
 430                          * Note: attr->a_vals can be null when using
 431                          * values result filter
 432                          */
 433                         if (private) {
 434                                 attr->a_vals = &dummy;
 435                         } else {
 436                                 attr->a_vals = ch_malloc(sizeof(struct berval));
 437                                 attr->a_vals->bv_val = NULL;
 438                                 attr->a_vals->bv_len = 0;
 439                         }
 440                         last = 0;
 441                 } else {
 442                         for ( last = 0; attr->a_vals[last].bv_val; last++ );
 443                 }
 444                 if ( last == 0 ) {
 445                         /* empty */
 446                 } else if ( attr->a_desc == slap_schema.si_ad_objectClass
 447                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass ) {
 448                         for ( bv = attr->a_vals; bv->bv_val; bv++ ) {
 449                                 ldap_back_map(&li->rwmap.rwm_oc, bv, &mapped,
 450                                                 BACKLDAP_REMAP);
 451                                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
 452                                         LBER_FREE(bv->bv_val);
 453                                         bv->bv_val = NULL;
 454                                         if (--last < 0)
 455                                                 break;
 456                                         *bv = attr->a_vals[last];
 457                                         attr->a_vals[last].bv_val = NULL;
 458                                         bv--;
 459
 460                                 } else if ( mapped.bv_val != bv->bv_val ) {
 461                                         /*
 462                                          * FIXME: after LBER_FREEing
 463                                          * the value is replaced by
 464                                          * ch_alloc'ed memory
 465                                          */
 466                                         LBER_FREE(bv->bv_val);
 467                                         ber_dupbv( bv, &mapped );
 468                                 }
 469                         }
 470
 471                 /*
 472                  * It is necessary to try to rewrite attributes with
 473                  * dn syntax because they might be used in ACLs as
 474                  * members of groups; since ACLs are applied to the
 475                  * rewritten stuff, no dn-based subject clause could
 476                  * be used at the ldap backend side (see
 477                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 478                  * The problem can be overcome by moving the dn-based
 479                  * ACLs to the target directory server, and letting
 480                  * everything pass thru the ldap backend.
 481                  */
 482                 } else if ( attr->a_desc->ad_type->sat_syntax ==
 483                                 slap_schema.si_syn_distinguishedName ) {
 484                         ldap_dnattr_result_rewrite( &dc, attr->a_vals );
 485                 }
 486
 487                 if ( last && attr->a_desc->ad_type->sat_equality &&
 488                         attr->a_desc->ad_type->sat_equality->smr_normalize ) {
 489                         int i;
 490
 491                         attr->a_nvals = ch_malloc((last+1)*sizeof(struct berval));
 492                         for (i=0; i<last; i++) {
 493                                 attr->a_desc->ad_type->sat_equality->smr_normalize(
 494                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 495                                         attr->a_desc->ad_type->sat_syntax,
 496                                         attr->a_desc->ad_type->sat_equality,
 497                                         &attr->a_vals[i], &attr->a_nvals[i],
 498                                         NULL /* op->o_tmpmemctx */ );
 499                         }
 500                         attr->a_nvals[i].bv_val = NULL;
 501                         attr->a_nvals[i].bv_len = 0;
 502                 } else {
 503                         attr->a_nvals = attr->a_vals;
 504                 }
 505                 *attrp = attr;
 506                 attrp = &attr->a_next;
 507         }
 508
 509         /* make sure it's free'able */
 510         if (!private && ent->e_name.bv_val == bdn->bv_val)
 511                 ber_dupbv( &ent->e_name, bdn );
 512         return LDAP_SUCCESS;
 513 }
 514
 515 /* return 0 IFF we can retrieve the entry with ndn
 516  */
 517 int
 518 ldap_back_entry_get(
 519         Operation *op,
 520         struct berval   *ndn,
 521         ObjectClass *oc,
 522         AttributeDescription *at,
 523         int rw,
 524         Entry **ent
 525 )
 526 {
 527         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 528         struct ldapconn *lc;
 529         int rc = 1, is_oc;
 530         struct berval mapped = BER_BVNULL, bdn, mdn;
 531         LDAPMessage     *result = NULL, *e = NULL;
 532         char *gattr[3];
 533         char *filter = NULL;
 534         Connection *oconn;
 535         SlapReply rs;
 536         dncookie dc;
 537
 538         /* Tell getconn this is a privileged op */
 539         is_oc = op->o_do_not_cache;
 540         op->o_do_not_cache = 1;
 541         lc = ldap_back_getconn(op, &rs);
 542         oconn = op->o_conn;
 543         op->o_conn = NULL;
 544         if ( !lc || !ldap_back_dobind(lc, op, &rs) ) {
 545                 op->o_do_not_cache = is_oc;
 546                 op->o_conn = oconn;
 547                 return 1;
 548         }
 549         op->o_do_not_cache = is_oc;
 550         op->o_conn = oconn;
 551
 552         /*
 553          * Rewrite the search base, if required
 554          */
 555         dc.rwmap = &li->rwmap;
 556 #ifdef ENABLE_REWRITE
 557         dc.conn = op->o_conn;
 558         dc.rs = &rs;
 559         dc.ctx = "searchBase";
 560 #else
 561         dc.tofrom = 1;
 562         dc.normalized = 1;
 563 #endif
 564         if ( ldap_back_dn_massage( &dc, ndn, &mdn ) ) {
 565                 return 1;
 566         }
 567
 568         if ( at ) {
 569                 ldap_back_map(&li->rwmap.rwm_at, &at->ad_cname, &mapped, BACKLDAP_MAP);
 570                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
 571                         rc = 1;
 572                         goto cleanup;
 573                 }
 574                 is_oc = (strcasecmp("objectclass", mapped.bv_val) == 0);
 575                 if (oc && !is_oc) {
 576                         gattr[0] = "objectclass";
 577                         gattr[1] = mapped.bv_val;
 578                         gattr[2] = NULL;
 579                 } else {
 580                         gattr[0] = mapped.bv_val;
 581                         gattr[1] = NULL;
 582                 }
 583         }
 584
 585         if (oc) {
 586                 char *ptr;
 587                 ldap_back_map(&li->rwmap.rwm_oc, &oc->soc_cname, &mapped,
 588                                                 BACKLDAP_MAP);
 589                 filter = ch_malloc(sizeof("(objectclass=)") + mapped.bv_len);
 590                 ptr = lutil_strcopy(filter, "(objectclass=");
 591                 ptr = lutil_strcopy(ptr, mapped.bv_val);
 592                 *ptr++ = ')';
 593                 *ptr++ = '\0';
 594         }
 595
 596         if (ldap_search_ext_s(lc->ld, mdn.bv_val, LDAP_SCOPE_BASE, filter,
 597                                 gattr, 0, NULL, NULL, LDAP_NO_LIMIT,
 598                                 LDAP_NO_LIMIT, &result) != LDAP_SUCCESS)
 599         {
 600                 goto cleanup;
 601         }
 602
 603         if ((e = ldap_first_entry(lc->ld, result)) == NULL) {
 604                 goto cleanup;
 605         }
 606
 607         *ent = ch_calloc(1,sizeof(Entry));
 608
 609         rc = ldap_build_entry(op, e, *ent, &bdn, 0);
 610
 611         if (rc != LDAP_SUCCESS) {
 612                 ch_free(*ent);
 613                 *ent = NULL;
 614         }
 615
 616 cleanup:
 617         if (result) {
 618                 ldap_msgfree(result);
 619         }
 620
 621         if ( filter ) {
 622                 ch_free( filter );
 623         }
 624
 625         if ( mdn.bv_val != ndn->bv_val ) {
 626                 ch_free( mdn.bv_val );
 627         }
 628
 629         return(rc);
 630 }
 631