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