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 #ifdef LDAP_BACK_PROXY_AUTHZ
  64         LDAPControl **ctrls = NULL;
  65 #endif /* LDAP_BACK_PROXY_AUTHZ */
  66
  67         lc = ldap_back_getconn(op, rs);
  68         if ( !lc ) {
  69                 return( -1 );
  70         }
  71
  72         /*
  73          * FIXME: in case of values return filter, we might want
  74          * to map attrs and maybe rewrite value
  75          */
  76         if ( !ldap_back_dobind( lc, op, rs ) ) {
  77                 return( -1 );
  78         }
  79
  80         /* should we check return values? */
  81         if (op->ors_deref != -1)
  82                 ldap_set_option( lc->ld, LDAP_OPT_DEREF, (void *)&op->ors_deref);
  83         if (op->ors_tlimit != -1) {
  84                 tv.tv_sec = op->ors_tlimit;
  85                 tv.tv_usec = 0;
  86         } else {
  87                 tv.tv_sec = 0;
  88         }
  89
  90         /*
  91          * Rewrite the search base, if required
  92          */
  93         dc.rwmap = &li->rwmap;
  94 #ifdef ENABLE_REWRITE
  95         dc.conn = op->o_conn;
  96         dc.rs = rs;
  97         dc.ctx = "searchBase";
  98 #else
  99         dc.tofrom = 1;
 100         dc.normalized = 0;
 101 #endif
 102         if ( ldap_back_dn_massage( &dc, &op->o_req_ndn, &mbase ) ) {
 103                 send_ldap_result( op, rs );
 104                 return -1;
 105         }
 106
 107         rc = ldap_back_filter_map_rewrite( &dc, op->ors_filter,
 108                         &mfilter, BACKLDAP_MAP );
 109
 110         switch ( rc ) {
 111         case LDAP_SUCCESS:
 112                 break;
 113
 114         case LDAP_COMPARE_FALSE:
 115                 rs->sr_err = LDAP_SUCCESS;
 116                 rs->sr_text = NULL;
 117                 rc = 0;
 118                 goto finish;
 119
 120         default:
 121                 rs->sr_err = LDAP_OTHER;
 122                 rs->sr_text = "Rewrite error";
 123                 dontfreetext = 1;
 124                 rc = -1;
 125                 goto finish;
 126         }
 127
 128         rs->sr_err = ldap_back_map_attrs( &li->rwmap.rwm_at,
 129                         op->ors_attrs,
 130                         BACKLDAP_MAP, &mapped_attrs );
 131         if ( rs->sr_err ) {
 132                 rc = -1;
 133                 goto finish;
 134         }
 135
 136 #ifdef LDAP_BACK_PROXY_AUTHZ
 137         rc = ldap_back_proxy_authz_ctrl( lc, op, rs, &ctrls );
 138         if ( rc != LDAP_SUCCESS ) {
 139                 dontfreetext = 1;
 140                 goto finish;
 141         }
 142 #endif /* LDAP_BACK_PROXY_AUTHZ */
 143
 144         rs->sr_err = ldap_search_ext(lc->ld, mbase.bv_val,
 145                         op->ors_scope, mfilter.bv_val,
 146                         mapped_attrs, op->ors_attrsonly,
 147 #ifdef LDAP_BACK_PROXY_AUTHZ
 148                         ctrls,
 149 #else /* ! LDAP_BACK_PROXY_AUTHZ */
 150                         op->o_ctrls,
 151 #endif /* ! LDAP_BACK_PROXY_AUTHZ */
 152                         NULL,
 153                         tv.tv_sec ? &tv : NULL, op->ors_slimit,
 154                         &msgid );
 155
 156         if ( rs->sr_err != LDAP_SUCCESS ) {
 157 fail:;
 158                 rc = ldap_back_op_result(lc, op, rs, msgid, 0);
 159                 goto finish;
 160         }
 161
 162         /* We pull apart the ber result, stuff it into a slapd entry, and
 163          * let send_search_entry stuff it back into ber format. Slow & ugly,
 164          * but this is necessary for version matching, and for ACL processing.
 165          */
 166
 167         for ( rc=0; rc != -1; rc = ldap_result(lc->ld, msgid, 0, &tv, &res))
 168         {
 169                 /* check for abandon */
 170                 if (op->o_abandon) {
 171                         ldap_abandon(lc->ld, msgid);
 172                         rc = 0;
 173                         goto finish;
 174                 }
 175
 176                 if (rc == 0) {
 177                         tv.tv_sec = 0;
 178                         tv.tv_usec = 100000;
 179                         ldap_pvt_thread_yield();
 180
 181                 } else if (rc == LDAP_RES_SEARCH_ENTRY) {
 182                         Entry ent = {0};
 183                         struct berval bdn;
 184                         int abort = 0;
 185                         e = ldap_first_entry(lc->ld,res);
 186                         if ( ( rc = ldap_build_entry(op, e, &ent, &bdn,
 187                                                 LDAP_BUILD_ENTRY_PRIVATE)) == LDAP_SUCCESS ) {
 188                                 rs->sr_entry = &ent;
 189                                 rs->sr_attrs = op->ors_attrs;
 190                                 rs->sr_flags = 0;
 191                                 abort = send_search_entry( op, rs );
 192                                 while (ent.e_attrs) {
 193                                         Attribute *a;
 194                                         BerVarray v;
 195
 196                                         a = ent.e_attrs;
 197                                         ent.e_attrs = a->a_next;
 198
 199                                         v = a->a_vals;
 200                                         if (a->a_vals != &dummy)
 201                                                 ber_bvarray_free(a->a_vals);
 202                                         if (a->a_nvals != v)
 203                                                 ber_bvarray_free(a->a_nvals);
 204                                         ch_free(a);
 205                                 }
 206
 207                                 if ( ent.e_dn && ( ent.e_dn != bdn.bv_val ) )
 208                                         free( ent.e_dn );
 209                                 if ( ent.e_ndn )
 210                                         free( ent.e_ndn );
 211                         }
 212                         ldap_msgfree(res);
 213                         if ( abort ) {
 214                                 ldap_abandon(lc->ld, msgid);
 215                                 goto finish;
 216                         }
 217
 218                 } else if ( rc == LDAP_RES_SEARCH_REFERENCE ) {
 219                         char            **references = NULL;
 220                         int             cnt;
 221
 222                         rc = ldap_parse_reference( lc->ld, res,
 223                                         &references, &rs->sr_ctrls, 1 );
 224
 225                         if ( rc != LDAP_SUCCESS ) {
 226                                 continue;
 227                         }
 228
 229                         if ( references == NULL ) {
 230                                 continue;
 231                         }
 232
 233                         for ( cnt = 0; references[ cnt ]; cnt++ )
 234                                 /* NO OP */ ;
 235
 236                         rs->sr_ref = ch_calloc( cnt + 1, sizeof( struct berval ) );
 237
 238                         for ( cnt = 0; references[ cnt ]; cnt++ ) {
 239                                 rs->sr_ref[ cnt ].bv_val = references[ cnt ];
 240                                 rs->sr_ref[ cnt ].bv_len = strlen( references[ cnt ] );
 241                         }
 242
 243                         /* ignore return value by now */
 244                         ( void )send_search_reference( op, rs );
 245
 246                         /* cleanup */
 247                         if ( references ) {
 248                                 ldap_value_free( references );
 249                                 ch_free( rs->sr_ref );
 250                                 rs->sr_ref = NULL;
 251                         }
 252
 253                         if ( rs->sr_ctrls ) {
 254                                 ldap_controls_free( rs->sr_ctrls );
 255                                 rs->sr_ctrls = NULL;
 256                         }
 257
 258                 } else {
 259                         rc = ldap_parse_result(lc->ld, res, &rs->sr_err,
 260                                         &match.bv_val, (char **)&rs->sr_text,
 261                                         NULL, NULL, 1);
 262                         if (rc != LDAP_SUCCESS ) rs->sr_err = rc;
 263                         rs->sr_err = slap_map_api2result( rs );
 264                         rc = 0;
 265                         break;
 266                 }
 267         }
 268
 269         if (rc == -1)
 270                 goto fail;
 271
 272         /*
 273          * Rewrite the matched portion of the search base, if required
 274          */
 275         if ( match.bv_val && *match.bv_val ) {
 276                 struct berval mdn;
 277
 278 #ifdef ENABLE_REWRITE
 279                 dc.ctx = "matchedDN";
 280 #else
 281                 dc.tofrom = 0;
 282                 dc.normalized = 0;
 283 #endif
 284                 match.bv_len = strlen( match.bv_val );
 285                 ldap_back_dn_massage(&dc, &match, &mdn);
 286                 rs->sr_matched = mdn.bv_val;
 287         }
 288         if ( rs->sr_v2ref ) {
 289                 rs->sr_err = LDAP_REFERRAL;
 290         }
 291
 292 finish:;
 293         send_ldap_result( op, rs );
 294
 295 #ifdef LDAP_BACK_PROXY_AUTHZ
 296         if ( ctrls && ctrls != op->o_ctrls ) {
 297                 free( ctrls[ 0 ] );
 298                 free( ctrls );
 299         }
 300 #endif /* LDAP_BACK_PROXY_AUTHZ */
 301
 302         if ( match.bv_val ) {
 303                 if ( rs->sr_matched != match.bv_val ) {
 304                         free( (char *)rs->sr_matched );
 305                 }
 306                 rs->sr_matched = NULL;
 307                 LDAP_FREE( match.bv_val );
 308         }
 309         if ( rs->sr_text ) {
 310                 if ( !dontfreetext ) {
 311                         LDAP_FREE( (char *)rs->sr_text );
 312                 }
 313                 rs->sr_text = NULL;
 314         }
 315         if ( mapped_attrs ) {
 316                 ch_free( mapped_attrs );
 317         }
 318         if ( mfilter.bv_val != op->ors_filterstr.bv_val ) {
 319                 ch_free( mfilter.bv_val );
 320         }
 321         if ( mbase.bv_val != op->o_req_ndn.bv_val ) {
 322                 free( mbase.bv_val );
 323         }
 324
 325         return rc;
 326 }
 327
 328 static int
 329 ldap_build_entry(
 330         Operation *op,
 331         LDAPMessage *e,
 332         Entry *ent,
 333         struct berval *bdn,
 334         int flags
 335 )
 336 {
 337         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 338         struct berval a, mapped;
 339         BerElement ber = *e->lm_ber;
 340         Attribute *attr, **attrp;
 341         struct berval *bv;
 342         const char *text;
 343         int last;
 344         int private = flags & LDAP_BUILD_ENTRY_PRIVATE;
 345         int normalize = flags & LDAP_BUILD_ENTRY_NORMALIZE;
 346         dncookie dc;
 347
 348         /* safe assumptions ... */
 349         assert( ent );
 350         ent->e_bv.bv_val = NULL;
 351
 352         if ( ber_scanf( &ber, "{m{", bdn ) == LBER_ERROR ) {
 353                 return LDAP_DECODING_ERROR;
 354         }
 355
 356         /*
 357          * Rewrite the dn of the result, if needed
 358          */
 359         dc.rwmap = &li->rwmap;
 360 #ifdef ENABLE_REWRITE
 361         dc.conn = op->o_conn;
 362         dc.rs = NULL;
 363         dc.ctx = "searchResult";
 364 #else
 365         dc.tofrom = 0;
 366         dc.normalized = 0;
 367 #endif
 368         if ( ldap_back_dn_massage( &dc, bdn, &ent->e_name ) ) {
 369                 return LDAP_OTHER;
 370         }
 371
 372         /*
 373          * Note: this may fail if the target host(s) schema differs
 374          * from the one known to the meta, and a DN with unknown
 375          * attributes is returned.
 376          *
 377          * FIXME: should we log anything, or delegate to dnNormalize?
 378          */
 379         if ( dnNormalize( 0, NULL, NULL, &ent->e_name, &ent->e_nname,
 380                 op->o_tmpmemctx ) != LDAP_SUCCESS )
 381         {
 382                 return LDAP_INVALID_DN_SYNTAX;
 383         }
 384
 385         attrp = &ent->e_attrs;
 386
 387 #ifdef ENABLE_REWRITE
 388         dc.ctx = "searchAttrDN";
 389 #endif
 390         while ( ber_scanf( &ber, "{m", &a ) != LBER_ERROR ) {
 391                 ldap_back_map(&li->rwmap.rwm_at, &a, &mapped, BACKLDAP_REMAP);
 392                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0')
 393                         continue;
 394                 attr = (Attribute *)ch_malloc( sizeof(Attribute) );
 395                 if (attr == NULL)
 396                         continue;
 397                 attr->a_flags = 0;
 398                 attr->a_next = 0;
 399                 attr->a_desc = NULL;
 400                 if (slap_bv2ad(&mapped, &attr->a_desc, &text) != LDAP_SUCCESS) {
 401                         if (slap_bv2undef_ad(&mapped, &attr->a_desc, &text)
 402                                         != LDAP_SUCCESS) {
 403 #ifdef NEW_LOGGING
 404                                 LDAP_LOG( BACK_LDAP, DETAIL1,
 405                                         "slap_bv2undef_ad(%s):  %s\n", mapped.bv_val, text, 0 );
 406 #else /* !NEW_LOGGING */
 407                                 Debug( LDAP_DEBUG_ANY,
 408                                                 "slap_bv2undef_ad(%s):  "
 409                                                 "%s\n%s", mapped.bv_val, text, "" );
 410 #endif /* !NEW_LOGGING */
 411                                 ch_free(attr);
 412                                 continue;
 413                         }
 414                 }
 415
 416                 /* no subschemaSubentry */
 417                 if ( attr->a_desc == slap_schema.si_ad_subschemaSubentry ) {
 418
 419                         /*
 420                          * We eat target's subschemaSubentry because
 421                          * a search for this value is likely not
 422                          * to resolve to the appropriate backend;
 423                          * later, the local subschemaSubentry is
 424                          * added.
 425                          */
 426                         ( void )ber_scanf( &ber, "x" /* [W] */ );
 427
 428                         ch_free(attr);
 429                         continue;
 430                 }
 431
 432                 if ( ber_scanf( &ber, "[W]", &attr->a_vals ) == LBER_ERROR
 433                                 || attr->a_vals == NULL ) {
 434                         /*
 435                          * Note: attr->a_vals can be null when using
 436                          * values result filter
 437                          */
 438                         if (private) {
 439                                 attr->a_vals = &dummy;
 440                         } else {
 441                                 attr->a_vals = ch_malloc(sizeof(struct berval));
 442                                 attr->a_vals->bv_val = NULL;
 443                                 attr->a_vals->bv_len = 0;
 444                         }
 445                         last = 0;
 446                 } else {
 447                         for ( last = 0; attr->a_vals[last].bv_val; last++ );
 448                 }
 449                 if ( last == 0 ) {
 450                         /* empty */
 451                 } else if ( attr->a_desc == slap_schema.si_ad_objectClass
 452                                 || attr->a_desc == slap_schema.si_ad_structuralObjectClass ) {
 453                         for ( bv = attr->a_vals; bv->bv_val; bv++ ) {
 454                                 ldap_back_map(&li->rwmap.rwm_oc, bv, &mapped,
 455                                                 BACKLDAP_REMAP);
 456                                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
 457                                         LBER_FREE(bv->bv_val);
 458                                         bv->bv_val = NULL;
 459                                         if (--last < 0)
 460                                                 break;
 461                                         *bv = attr->a_vals[last];
 462                                         attr->a_vals[last].bv_val = NULL;
 463                                         bv--;
 464
 465                                 } else if ( mapped.bv_val != bv->bv_val ) {
 466                                         /*
 467                                          * FIXME: after LBER_FREEing
 468                                          * the value is replaced by
 469                                          * ch_alloc'ed memory
 470                                          */
 471                                         LBER_FREE(bv->bv_val);
 472                                         ber_dupbv( bv, &mapped );
 473                                 }
 474                         }
 475
 476                 /*
 477                  * It is necessary to try to rewrite attributes with
 478                  * dn syntax because they might be used in ACLs as
 479                  * members of groups; since ACLs are applied to the
 480                  * rewritten stuff, no dn-based subject clause could
 481                  * be used at the ldap backend side (see
 482                  * http://www.OpenLDAP.org/faq/data/cache/452.html)
 483                  * The problem can be overcome by moving the dn-based
 484                  * ACLs to the target directory server, and letting
 485                  * everything pass thru the ldap backend.
 486                  */
 487                 } else if ( attr->a_desc->ad_type->sat_syntax ==
 488                                 slap_schema.si_syn_distinguishedName ) {
 489                         ldap_dnattr_result_rewrite( &dc, attr->a_vals );
 490                 }
 491
 492                 if ( normalize && last && attr->a_desc->ad_type->sat_equality &&
 493                         attr->a_desc->ad_type->sat_equality->smr_normalize ) {
 494                         int i;
 495
 496                         attr->a_nvals = ch_malloc((last+1)*sizeof(struct berval));
 497                         for (i=0; i<last; i++) {
 498                                 attr->a_desc->ad_type->sat_equality->smr_normalize(
 499                                         SLAP_MR_VALUE_OF_ATTRIBUTE_SYNTAX,
 500                                         attr->a_desc->ad_type->sat_syntax,
 501                                         attr->a_desc->ad_type->sat_equality,
 502                                         &attr->a_vals[i], &attr->a_nvals[i],
 503                                         NULL /* op->o_tmpmemctx */ );
 504                         }
 505                         attr->a_nvals[i].bv_val = NULL;
 506                         attr->a_nvals[i].bv_len = 0;
 507                 } else {
 508                         attr->a_nvals = attr->a_vals;
 509                 }
 510                 *attrp = attr;
 511                 attrp = &attr->a_next;
 512         }
 513
 514         /* make sure it's free'able */
 515         if (!private && ent->e_name.bv_val == bdn->bv_val)
 516                 ber_dupbv( &ent->e_name, bdn );
 517         return LDAP_SUCCESS;
 518 }
 519
 520 /* return 0 IFF we can retrieve the entry with ndn
 521  */
 522 int
 523 ldap_back_entry_get(
 524         Operation *op,
 525         struct berval   *ndn,
 526         ObjectClass *oc,
 527         AttributeDescription *at,
 528         int rw,
 529         Entry **ent
 530 )
 531 {
 532         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 533         struct ldapconn *lc;
 534         int rc = 1, is_oc;
 535         struct berval mapped = BER_BVNULL, bdn, mdn;
 536         LDAPMessage     *result = NULL, *e = NULL;
 537         char *gattr[3];
 538         char *filter = NULL;
 539         Connection *oconn;
 540         SlapReply rs;
 541         dncookie dc;
 542
 543         /* Tell getconn this is a privileged op */
 544         is_oc = op->o_do_not_cache;
 545         op->o_do_not_cache = 1;
 546         lc = ldap_back_getconn(op, &rs);
 547         oconn = op->o_conn;
 548         op->o_conn = NULL;
 549         if ( !lc || !ldap_back_dobind(lc, op, &rs) ) {
 550                 op->o_do_not_cache = is_oc;
 551                 op->o_conn = oconn;
 552                 return 1;
 553         }
 554         op->o_do_not_cache = is_oc;
 555         op->o_conn = oconn;
 556
 557         /*
 558          * Rewrite the search base, if required
 559          */
 560         dc.rwmap = &li->rwmap;
 561 #ifdef ENABLE_REWRITE
 562         dc.conn = op->o_conn;
 563         dc.rs = &rs;
 564         dc.ctx = "searchBase";
 565 #else
 566         dc.tofrom = 1;
 567         dc.normalized = 1;
 568 #endif
 569         if ( ldap_back_dn_massage( &dc, ndn, &mdn ) ) {
 570                 return 1;
 571         }
 572
 573         if ( at ) {
 574                 ldap_back_map(&li->rwmap.rwm_at, &at->ad_cname, &mapped, BACKLDAP_MAP);
 575                 if (mapped.bv_val == NULL || mapped.bv_val[0] == '\0') {
 576                         rc = 1;
 577                         goto cleanup;
 578                 }
 579         }
 580
 581         is_oc = (strcasecmp("objectclass", mapped.bv_val) == 0);
 582         if (oc && !is_oc) {
 583                 gattr[0] = "objectclass";
 584                 gattr[1] = mapped.bv_val;
 585                 gattr[2] = NULL;
 586         } else {
 587                 gattr[0] = mapped.bv_val;
 588                 gattr[1] = NULL;
 589         }
 590         if (oc) {
 591                 char *ptr;
 592                 ldap_back_map(&li->rwmap.rwm_oc, &oc->soc_cname, &mapped,
 593                                                 BACKLDAP_MAP);
 594                 filter = ch_malloc(sizeof("(objectclass=)") + mapped.bv_len);
 595                 ptr = lutil_strcopy(filter, "(objectclass=");
 596                 ptr = lutil_strcopy(ptr, mapped.bv_val);
 597                 *ptr++ = ')';
 598                 *ptr++ = '\0';
 599         }
 600
 601         if (ldap_search_ext_s(lc->ld, mdn.bv_val, LDAP_SCOPE_BASE, filter,
 602                                 gattr, 0, NULL, NULL, LDAP_NO_LIMIT,
 603                                 LDAP_NO_LIMIT, &result) != LDAP_SUCCESS)
 604         {
 605                 goto cleanup;
 606         }
 607
 608         if ((e = ldap_first_entry(lc->ld, result)) == NULL) {
 609                 goto cleanup;
 610         }
 611
 612         *ent = ch_calloc(1,sizeof(Entry));
 613
 614         rc = ldap_build_entry(op, e, *ent, &bdn, LDAP_BUILD_ENTRY_NORMALIZE);
 615
 616         if (rc != LDAP_SUCCESS) {
 617                 ch_free(*ent);
 618                 *ent = NULL;
 619         }
 620
 621 cleanup:
 622         if (result) {
 623                 ldap_msgfree(result);
 624         }
 625
 626         if ( filter ) {
 627                 ch_free( filter );
 628         }
 629
 630         if ( mdn.bv_val != ndn->bv_val ) {
 631                 ch_free( mdn.bv_val );
 632         }
 633
 634         return(rc);
 635 }
 636