git.sur5r.net Git - openldap/blob - servers/slapd/backend.c

   1 /* backend.c - routines for dealing with back-end databases */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1998-2005 The OpenLDAP Foundation.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted only as authorized by the OpenLDAP
  10  * Public License.
  11  *
  12  * A copy of this license is available in the file LICENSE in the
  13  * top-level directory of the distribution or, alternatively, at
  14  * <http://www.OpenLDAP.org/license.html>.
  15  */
  16 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
  17  * All rights reserved.
  18  *
  19  * Redistribution and use in source and binary forms are permitted
  20  * provided that this notice is preserved and that due credit is given
  21  * to the University of Michigan at Ann Arbor. The name of the University
  22  * may not be used to endorse or promote products derived from this
  23  * software without specific prior written permission. This software
  24  * is provided ``as is'' without express or implied warranty.
  25  */
  26
  27
  28 #include "portable.h"
  29
  30 #include <stdio.h>
  31
  32 #include <ac/string.h>
  33 #include <ac/socket.h>
  34 #include <sys/stat.h>
  35
  36 #include "slap.h"
  37 #include "lutil.h"
  38 #include "lber_pvt.h"
  39
  40 #ifdef LDAP_SLAPI
  41 #include "slapi/slapi.h"
  42
  43 static void init_group_pblock( Operation *op, Entry *target,
  44         Entry *e, struct berval *op_ndn, AttributeDescription *group_at );
  45 static int call_group_preop_plugins( Operation *op );
  46 static void call_group_postop_plugins( Operation *op );
  47 #endif /* LDAP_SLAPI */
  48
  49 /*
  50  * If a module is configured as dynamic, its header should not
  51  * get included into slapd. While this is a general rule and does
  52  * not have much of an effect in UNIX, this rule should be adhered
  53  * to for Windows, where dynamic object code should not be implicitly
  54  * imported into slapd without appropriate __declspec(dllimport) directives.
  55  */
  56
  57 int                     nBackendInfo = 0;
  58 slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo);
  59
  60 int                     nBackendDB = 0;
  61 slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB);
  62
  63 static int
  64 backend_init_controls( BackendInfo *bi )
  65 {
  66         if ( bi->bi_controls ) {
  67                 int     i;
  68
  69                 for ( i = 0; bi->bi_controls[ i ]; i++ ) {
  70                         int     cid;
  71
  72                         if ( slap_find_control_id( bi->bi_controls[ i ], &cid )
  73                                         == LDAP_CONTROL_NOT_FOUND )
  74                         {
  75                                 if ( !( slapMode & SLAP_TOOL_MODE ) ) {
  76                                         assert( 0 );
  77                                 }
  78
  79                                 return -1;
  80                         }
  81
  82                         bi->bi_ctrls[ cid ] = 1;
  83                 }
  84         }
  85
  86         return 0;
  87 }
  88
  89 int backend_init(void)
  90 {
  91         int rc = -1;
  92         BackendInfo *bi;
  93
  94         if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) {
  95                 /* already initialized */
  96                 Debug( LDAP_DEBUG_ANY,
  97                         "backend_init: already initialized\n", 0, 0, 0 );
  98                 return -1;
  99         }
 100
 101         for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) {
 102                 assert( bi->bi_init );
 103
 104                 rc = bi->bi_init( bi );
 105
 106                 if(rc != 0) {
 107                         Debug( LDAP_DEBUG_ANY,
 108                                 "backend_init: initialized for type \"%s\"\n",
 109                                 bi->bi_type, 0, 0 );
 110                         /* destroy those we've already inited */
 111                         for( nBackendInfo--;
 112                                 nBackendInfo >= 0 ;
 113                                 nBackendInfo-- )
 114                         {
 115                                 if ( slap_binfo[nBackendInfo].bi_destroy ) {
 116                                         slap_binfo[nBackendInfo].bi_destroy(
 117                                                 &slap_binfo[nBackendInfo] );
 118                                 }
 119                         }
 120                         return rc;
 121                 }
 122
 123                 LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next);
 124         }
 125
 126         if ( nBackendInfo > 0) {
 127                 return 0;
 128         }
 129
 130 #ifdef SLAPD_MODULES
 131         return 0;
 132 #else
 133
 134         Debug( LDAP_DEBUG_ANY,
 135                 "backend_init: failed\n",
 136                 0, 0, 0 );
 137
 138         return rc;
 139 #endif /* SLAPD_MODULES */
 140 }
 141
 142 int backend_add(BackendInfo *aBackendInfo)
 143 {
 144         int rc = 0;
 145
 146         if ( aBackendInfo->bi_init == NULL ) {
 147                 Debug( LDAP_DEBUG_ANY, "backend_add: "
 148                         "backend type \"%s\" does not have the (mandatory)init function\n",
 149                         aBackendInfo->bi_type, 0, 0 );
 150                 return -1;
 151         }
 152
 153         rc = aBackendInfo->bi_init(aBackendInfo);
 154         if ( rc != 0) {
 155                 Debug( LDAP_DEBUG_ANY,
 156                         "backend_add:  initialization for type \"%s\" failed\n",
 157                         aBackendInfo->bi_type, 0, 0 );
 158                 return rc;
 159         }
 160
 161         (void)backend_init_controls( aBackendInfo );
 162
 163         /* now add the backend type to the Backend Info List */
 164         LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next );
 165         nBackendInfo++;
 166         return 0;
 167 }
 168
 169 static int
 170 backend_set_controls( BackendDB *be )
 171 {
 172         BackendInfo     *bi = be->bd_info;
 173
 174         /* back-relay takes care of itself; so may do other */
 175         if ( overlay_is_over( be ) ) {
 176                 bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig;
 177         }
 178
 179         if ( bi->bi_controls ) {
 180                 if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) {
 181                         AC_MEMCPY( be->be_ctrls, bi->bi_ctrls,
 182                                         sizeof( be->be_ctrls ) );
 183                         be->be_ctrls[ SLAP_MAX_CIDS ] = 1;
 184
 185                 } else {
 186                         int     i;
 187
 188                         for ( i = 0; i < SLAP_MAX_CIDS; i++ ) {
 189                                 if ( bi->bi_ctrls[ i ] ) {
 190                                         be->be_ctrls[ i ] = bi->bi_ctrls[ i ];
 191                                 }
 192                         }
 193                 }
 194
 195         }
 196
 197         return 0;
 198 }
 199
 200 /* startup a specific backend database */
 201 int backend_startup_one(Backend *be)
 202 {
 203         int             rc = 0;
 204
 205         assert( be );
 206
 207         be->be_pending_csn_list = (struct be_pcl *)
 208                 ch_calloc( 1, sizeof( struct be_pcl ));
 209
 210         LDAP_TAILQ_INIT( be->be_pending_csn_list );
 211
 212         Debug( LDAP_DEBUG_TRACE,
 213                 "backend_startup_one: starting \"%s\"\n",
 214                 be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)",
 215                 0, 0 );
 216
 217         /* set database controls */
 218         (void)backend_set_controls( be );
 219
 220         if ( be->bd_info->bi_db_open ) {
 221                 rc = be->bd_info->bi_db_open( be );
 222                 if ( rc == 0 ) {
 223                         (void)backend_set_controls( be );
 224
 225                 } else {
 226                         Debug( LDAP_DEBUG_ANY,
 227                                 "backend_startup_one: bi_db_open failed! (%d)\n",
 228                                 rc, 0, 0 );
 229                 }
 230         }
 231
 232         return rc;
 233 }
 234
 235 int backend_startup(Backend *be)
 236 {
 237         int i;
 238         int rc = 0;
 239         BackendInfo *bi;
 240
 241         if( ! ( nBackendDB > 0 ) ) {
 242                 /* no databases */
 243                 Debug( LDAP_DEBUG_ANY,
 244                         "backend_startup: %d databases to startup.\n",
 245                         nBackendDB, 0, 0 );
 246                 return 1;
 247         }
 248
 249         if(be != NULL) {
 250                 if ( be->bd_info->bi_open ) {
 251                         rc = be->bd_info->bi_open( be->bd_info );
 252                         if ( rc != 0 ) {
 253                                 Debug( LDAP_DEBUG_ANY,
 254                                         "backend_startup: bi_open failed!\n",
 255                                         0, 0, 0 );
 256
 257                                 return rc;
 258                         }
 259                 }
 260
 261                 return backend_startup_one( be );
 262         }
 263
 264         /* open frontend, if required */
 265         if ( frontendDB->bd_info->bi_db_open ) {
 266                 rc = frontendDB->bd_info->bi_db_open( frontendDB );
 267                 if ( rc != 0 ) {
 268                         Debug( LDAP_DEBUG_ANY,
 269                                 "backend_startup: bi_db_open(frontend) failed! (%d)\n",
 270                                 rc, 0, 0 );
 271                         return rc;
 272                 }
 273         }
 274
 275         /* open each backend type */
 276         i = -1;
 277         LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) {
 278                 i++;
 279                 if( bi->bi_nDB == 0) {
 280                         /* no database of this type, don't open */
 281                         continue;
 282                 }
 283
 284                 if( bi->bi_open ) {
 285                         rc = bi->bi_open( bi );
 286                         if ( rc != 0 ) {
 287                                 Debug( LDAP_DEBUG_ANY,
 288                                         "backend_startup: bi_open %d (%s) failed!\n",
 289                                         i, bi->bi_type, 0 );
 290                                 return rc;
 291                         }
 292                 }
 293
 294                 (void)backend_init_controls( bi );
 295         }
 296
 297         /* open each backend database */
 298         i = -1;
 299         LDAP_STAILQ_FOREACH(be, &backendDB, be_next) {
 300                 i++;
 301                 if ( be->be_suffix == NULL ) {
 302                         Debug( LDAP_DEBUG_ANY,
 303                                 "backend_startup: warning, database %d (%s) "
 304                                 "has no suffix\n",
 305                                 i, be->bd_info->bi_type, 0 );
 306                 }
 307                 /* append global access controls */
 308                 acl_append( &be->be_acl, frontendDB->be_acl, -1 );
 309
 310                 rc = backend_startup_one( be );
 311
 312                 if ( rc ) return rc;
 313         }
 314
 315         return rc;
 316 }
 317
 318 int backend_num( Backend *be )
 319 {
 320         int i = 0;
 321         BackendDB *b2;
 322
 323         if( be == NULL ) return -1;
 324
 325         LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) {
 326                 if( be == b2 ) return i;
 327                 i++;
 328         }
 329         return -1;
 330 }
 331
 332 int backend_shutdown( Backend *be )
 333 {
 334         int rc = 0;
 335         BackendInfo *bi;
 336
 337         if( be != NULL ) {
 338                 /* shutdown a specific backend database */
 339
 340                 if ( be->bd_info->bi_nDB == 0 ) {
 341                         /* no database of this type, we never opened it */
 342                         return 0;
 343                 }
 344
 345                 if ( be->bd_info->bi_db_close ) {
 346                         be->bd_info->bi_db_close( be );
 347                 }
 348
 349                 if( be->bd_info->bi_close ) {
 350                         be->bd_info->bi_close( be->bd_info );
 351                 }
 352
 353                 return 0;
 354         }
 355
 356         /* close each backend database */
 357         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 358                 if ( be->bd_info->bi_db_close ) {
 359                         be->bd_info->bi_db_close( be );
 360                 }
 361
 362                 if(rc != 0) {
 363                         Debug( LDAP_DEBUG_ANY,
 364                                 "backend_close: bi_db_close %s failed!\n",
 365                                 be->be_type, 0, 0 );
 366                 }
 367         }
 368
 369         /* close each backend type */
 370         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 371                 if( bi->bi_nDB == 0 ) {
 372                         /* no database of this type */
 373                         continue;
 374                 }
 375
 376                 if( bi->bi_close ) {
 377                         bi->bi_close( bi );
 378                 }
 379         }
 380
 381         /* close frontend, if required */
 382         if ( frontendDB->bd_info->bi_db_close ) {
 383                 rc = frontendDB->bd_info->bi_db_close ( frontendDB );
 384                 if ( rc != 0 ) {
 385                         Debug( LDAP_DEBUG_ANY,
 386                                 "backend_startup: bi_db_close(frontend) failed! (%d)\n",
 387                                 rc, 0, 0 );
 388                 }
 389         }
 390
 391         return 0;
 392 }
 393
 394 void backend_destroy_one( BackendDB *bd )
 395 {
 396         LDAP_STAILQ_REMOVE(&backendDB, bd, slap_backend_db, be_next );
 397
 398         if ( bd->be_syncinfo ) {
 399                 syncinfo_free( bd->be_syncinfo );
 400         }
 401
 402         if ( bd->be_pending_csn_list ) {
 403                 struct slap_csn_entry *csne;
 404                 csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list );
 405                 while ( csne ) {
 406                         struct slap_csn_entry *tmp_csne = csne;
 407
 408                         LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link );
 409                         ch_free( csne->ce_csn.bv_val );
 410                         csne = LDAP_TAILQ_NEXT( csne, ce_csn_link );
 411                         ch_free( tmp_csne );
 412                 }
 413         }
 414
 415         if ( bd->bd_info->bi_db_destroy ) {
 416                 bd->bd_info->bi_db_destroy( bd );
 417         }
 418         ber_bvarray_free( bd->be_suffix );
 419         ber_bvarray_free( bd->be_nsuffix );
 420         if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 421                 free( bd->be_rootdn.bv_val );
 422         }
 423         if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 424                 free( bd->be_rootndn.bv_val );
 425         }
 426         if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 427                 free( bd->be_rootpw.bv_val );
 428         }
 429         acl_destroy( bd->be_acl, frontendDB->be_acl );
 430         free( bd );
 431 }
 432
 433 int backend_destroy(void)
 434 {
 435         BackendDB *bd;
 436         BackendInfo *bi;
 437
 438         /* destroy each backend database */
 439         while (( bd = LDAP_STAILQ_FIRST(&backendDB))) {
 440                 backend_destroy_one( bd );
 441         }
 442
 443         /* destroy each backend type */
 444         LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) {
 445                 if( bi->bi_destroy ) {
 446                         bi->bi_destroy( bi );
 447                 }
 448         }
 449
 450         nBackendInfo = 0;
 451         LDAP_STAILQ_INIT(&backendInfo);
 452
 453         /* destroy frontend database */
 454         bd = frontendDB;
 455         if ( bd ) {
 456                 if ( bd->bd_info->bi_db_destroy ) {
 457                         bd->bd_info->bi_db_destroy( bd );
 458                 }
 459                 ber_bvarray_free( bd->be_suffix );
 460                 ber_bvarray_free( bd->be_nsuffix );
 461                 if ( !BER_BVISNULL( &bd->be_rootdn ) ) {
 462                         free( bd->be_rootdn.bv_val );
 463                 }
 464                 if ( !BER_BVISNULL( &bd->be_rootndn ) ) {
 465                         free( bd->be_rootndn.bv_val );
 466                 }
 467                 if ( !BER_BVISNULL( &bd->be_rootpw ) ) {
 468                         free( bd->be_rootpw.bv_val );
 469                 }
 470                 acl_destroy( bd->be_acl, frontendDB->be_acl );
 471         }
 472
 473         return 0;
 474 }
 475
 476 BackendInfo* backend_info(const char *type)
 477 {
 478         BackendInfo *bi;
 479
 480         /* search for the backend type */
 481         LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) {
 482                 if( strcasecmp(bi->bi_type, type) == 0 ) {
 483                         return bi;
 484                 }
 485         }
 486
 487         return NULL;
 488 }
 489
 490
 491 BackendDB *
 492 backend_db_init(
 493     const char  *type )
 494 {
 495         Backend *be;
 496         BackendInfo *bi = backend_info(type);
 497         int     rc = 0;
 498
 499         if( bi == NULL ) {
 500                 fprintf( stderr, "Unrecognized database type (%s)\n", type );
 501                 return NULL;
 502         }
 503
 504         be = ch_calloc( 1, sizeof(Backend) );
 505         nbackends++;
 506         LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next);
 507
 508         be->bd_info = bi;
 509
 510         be->be_def_limit = frontendDB->be_def_limit;
 511         be->be_dfltaccess = frontendDB->be_dfltaccess;
 512
 513         be->be_restrictops = frontendDB->be_restrictops;
 514         be->be_requires = frontendDB->be_requires;
 515         be->be_ssf_set = frontendDB->be_ssf_set;
 516
 517         be->be_pcl_mutexp = &be->be_pcl_mutex;
 518         ldap_pvt_thread_mutex_init( be->be_pcl_mutexp );
 519
 520         /* assign a default depth limit for alias deref */
 521         be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH;
 522
 523         if ( bi->bi_db_init ) {
 524                 rc = bi->bi_db_init( be );
 525         }
 526
 527         if ( rc != 0 ) {
 528                 fprintf( stderr, "database init failed (%s)\n", type );
 529                 nbackends--;
 530                 return NULL;
 531         }
 532
 533         bi->bi_nDB++;
 534         return( be );
 535 }
 536
 537 void
 538 be_db_close( void )
 539 {
 540         BackendDB *be;
 541
 542         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 543                 if ( be->bd_info->bi_db_close ) {
 544                         be->bd_info->bi_db_close( be );
 545                 }
 546         }
 547
 548         if ( frontendDB->bd_info->bi_db_close ) {
 549                 (*frontendDB->bd_info->bi_db_close)( frontendDB );
 550         }
 551
 552 }
 553
 554 Backend *
 555 select_backend(
 556         struct berval * dn,
 557         int manageDSAit,
 558         int noSubs )
 559 {
 560         int             j;
 561         ber_len_t       len, dnlen = dn->bv_len;
 562         Backend         *be, *b2 = NULL;
 563
 564         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 565                 if ( be->be_nsuffix == NULL ) {
 566                         continue;
 567                 }
 568
 569                 for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ )
 570                 {
 571                         if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs )
 572                         {
 573                                 continue;
 574                         }
 575
 576                         len = be->be_nsuffix[j].bv_len;
 577
 578                         if ( len > dnlen ) {
 579                                 /* suffix is longer than DN */
 580                                 continue;
 581                         }
 582
 583                         /*
 584                          * input DN is normalized, so the separator check
 585                          * need not look at escaping
 586                          */
 587                         if ( len && len < dnlen &&
 588                                 !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] ))
 589                         {
 590                                 continue;
 591                         }
 592
 593                         if ( strcmp( be->be_nsuffix[j].bv_val,
 594                                 &dn->bv_val[dnlen-len] ) == 0 )
 595                         {
 596                                 if( b2 == NULL ) {
 597                                         b2 = be;
 598
 599                                         if( manageDSAit && len == dnlen &&
 600                                                 !SLAP_GLUE_SUBORDINATE( be ) ) {
 601                                                 continue;
 602                                         }
 603                                 } else {
 604                                         b2 = be;
 605                                 }
 606                                 return b2;
 607                         }
 608                 }
 609         }
 610
 611         return b2;
 612 }
 613
 614 int
 615 be_issuffix(
 616     Backend *be,
 617     struct berval *bvsuffix )
 618 {
 619         int     i;
 620
 621         if ( be->be_nsuffix == NULL ) {
 622                 return 0;
 623         }
 624
 625         for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) {
 626                 if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) {
 627                         return 1;
 628                 }
 629         }
 630
 631         return 0;
 632 }
 633
 634 int
 635 be_isroot_dn( Backend *be, struct berval *ndn )
 636 {
 637         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) {
 638                 return 0;
 639         }
 640
 641         return dn_match( &be->be_rootndn, ndn );
 642 }
 643
 644 int
 645 be_slurp_update( Operation *op )
 646 {
 647         return ( SLAP_SLURP_SHADOW( op->o_bd ) &&
 648                 be_isupdate_dn( op->o_bd, &op->o_ndn ) );
 649 }
 650
 651 int
 652 be_shadow_update( Operation *op )
 653 {
 654         return ( SLAP_SYNC_SHADOW( op->o_bd ) ||
 655                 ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) );
 656 }
 657
 658 int
 659 be_isupdate_dn( Backend *be, struct berval *ndn )
 660 {
 661         if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) {
 662                 return 0;
 663         }
 664
 665         return dn_match( &be->be_update_ndn, ndn );
 666 }
 667
 668 struct berval *
 669 be_root_dn( Backend *be )
 670 {
 671         return &be->be_rootdn;
 672 }
 673
 674 int
 675 be_isroot( Operation *op )
 676 {
 677         return be_isroot_dn( op->o_bd, &op->o_ndn );
 678 }
 679
 680 int
 681 be_isroot_pw( Operation *op )
 682 {
 683         int result;
 684
 685         if ( ! be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 686                 return 0;
 687         }
 688
 689         if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) {
 690                 return 0;
 691         }
 692
 693 #ifdef SLAPD_SPASSWD
 694         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind,
 695                 op->o_conn->c_sasl_authctx, NULL );
 696 #endif
 697
 698         result = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL );
 699
 700 #ifdef SLAPD_SPASSWD
 701         ldap_pvt_thread_pool_setkey( op->o_threadctx, slap_sasl_bind, NULL, NULL );
 702 #endif
 703
 704         return result == 0;
 705 }
 706
 707 int
 708 be_entry_release_rw(
 709         Operation *op,
 710         Entry *e,
 711         int rw )
 712 {
 713         if ( op->o_bd->be_release ) {
 714                 /* free and release entry from backend */
 715                 return op->o_bd->be_release( op, e, rw );
 716         } else {
 717                 /* free entry */
 718                 entry_free( e );
 719                 return 0;
 720         }
 721 }
 722
 723 int
 724 backend_unbind( Operation *op, SlapReply *rs )
 725 {
 726         int             i = 0;
 727         BackendDB *be;
 728
 729         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 730 #if defined( LDAP_SLAPI )
 731                 if ( op->o_pb ) {
 732                         int rc;
 733                         if ( i == 0 ) slapi_int_pblock_set_operation( op->o_pb, op );
 734                         slapi_pblock_set( op->o_pb, SLAPI_BACKEND, (void *)be );
 735                         rc = slapi_int_call_plugins( be,
 736                                 SLAPI_PLUGIN_PRE_UNBIND_FN, (Slapi_PBlock *)op->o_pb );
 737                         if ( rc < 0 ) {
 738                                 /*
 739                                  * A preoperation plugin failure will abort the
 740                                  * entire operation.
 741                                  */
 742                                 Debug(LDAP_DEBUG_TRACE,
 743                                         "do_bind: Unbind preoperation plugin failed\n",
 744                                         0, 0, 0);
 745                                 return 0;
 746                         }
 747                 }
 748 #endif /* defined( LDAP_SLAPI ) */
 749
 750                 if ( be->be_unbind ) {
 751                         op->o_bd = be;
 752                         be->be_unbind( op, rs );
 753                 }
 754
 755 #if defined( LDAP_SLAPI )
 756                 if ( op->o_pb != NULL && slapi_int_call_plugins( be,
 757                         SLAPI_PLUGIN_POST_UNBIND_FN, (Slapi_PBlock *)op->o_pb ) < 0 )
 758                 {
 759                         Debug(LDAP_DEBUG_TRACE,
 760                                 "do_unbind: Unbind postoperation plugins failed\n",
 761                                 0, 0, 0);
 762                 }
 763 #endif /* defined( LDAP_SLAPI ) */
 764                 i++;
 765         }
 766
 767         return 0;
 768 }
 769
 770 int
 771 backend_connection_init(
 772         Connection   *conn )
 773 {
 774         BackendDB *be;
 775
 776         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 777                 if ( be->be_connection_init ) {
 778                         be->be_connection_init( be, conn );
 779                 }
 780         }
 781
 782         return 0;
 783 }
 784
 785 int
 786 backend_connection_destroy(
 787         Connection   *conn )
 788 {
 789         BackendDB *be;
 790
 791         LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) {
 792                 if ( be->be_connection_destroy ) {
 793                         be->be_connection_destroy( be, conn);
 794                 }
 795         }
 796
 797         return 0;
 798 }
 799
 800 int
 801 backend_check_controls(
 802         Operation *op,
 803         SlapReply *rs )
 804 {
 805         LDAPControl **ctrls = op->o_ctrls;
 806         rs->sr_err = LDAP_SUCCESS;
 807
 808         if( ctrls ) {
 809                 for( ; *ctrls != NULL ; ctrls++ ) {
 810                         int cid;
 811
 812                         switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) {
 813                         case LDAP_CONTROL_NOT_FOUND:
 814                                 /* unrecognized control */
 815                                 if ( (*ctrls)->ldctl_iscritical ) {
 816                                         /* should not be reachable */
 817                                         Debug( LDAP_DEBUG_ANY,
 818                                                 "backend_check_controls: unrecognized control: %s\n",
 819                                                 (*ctrls)->ldctl_oid, 0, 0 );
 820                                         assert( 0 );
 821                                 }
 822                                 break;
 823
 824                         case LDAP_COMPARE_FALSE:
 825                                 if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) {
 826                                         /* Per RFC 2251 (and LDAPBIS discussions), if the control
 827                                          * is recognized and appropriate for the operation (which
 828                                          * we've already verified), then the server should make
 829                                          * use of the control when performing the operation.
 830                                          *
 831                                          * Here we find that operation extended by the control
 832                                          * is unavailable in a particular context, and the control
 833                                          * is marked Critical, hence the return of
 834                                          * unwillingToPerform.
 835                                          */
 836                                         rs->sr_text = "critical control unavailable in context";
 837                                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 838                                         goto done;
 839                                 }
 840                                 break;
 841
 842                         case LDAP_COMPARE_TRUE:
 843                                 break;
 844
 845                         default:
 846                                 /* unreachable */
 847                                 Debug( LDAP_DEBUG_ANY,
 848                                         "backend_check_controls: unable to check control: %s\n",
 849                                         (*ctrls)->ldctl_oid, 0, 0 );
 850                                 assert( 0 );
 851
 852                                 rs->sr_text = "unable to check control";
 853                                 rs->sr_err = LDAP_OTHER;
 854                                 goto done;
 855                         }
 856                 }
 857         }
 858
 859         /* check should be generalized */
 860         if( get_manageDIT(op) && !be_isroot(op)) {
 861                 rs->sr_text = "requires manager authorization";
 862                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 863         }
 864
 865 done:;
 866         return rs->sr_err;
 867 }
 868
 869 int
 870 backend_check_restrictions(
 871         Operation *op,
 872         SlapReply *rs,
 873         struct berval *opdata )
 874 {
 875         slap_mask_t restrictops;
 876         slap_mask_t requires;
 877         slap_mask_t opflag;
 878         slap_mask_t exopflag = 0;
 879         slap_ssf_set_t *ssf;
 880         int updateop = 0;
 881         int starttls = 0;
 882         int session = 0;
 883
 884         if ( op->o_bd ) {
 885                 int     rc = SLAP_CB_CONTINUE;
 886
 887                 if ( op->o_bd->be_chk_controls ) {
 888                         rc = ( *op->o_bd->be_chk_controls )( op, rs );
 889                 }
 890
 891                 if ( rc == SLAP_CB_CONTINUE ) {
 892                         rc = backend_check_controls( op, rs );
 893                 }
 894
 895                 if ( rc != LDAP_SUCCESS ) {
 896                         return rs->sr_err;
 897                 }
 898
 899                 restrictops = op->o_bd->be_restrictops;
 900                 requires = op->o_bd->be_requires;
 901                 ssf = &op->o_bd->be_ssf_set;
 902
 903         } else {
 904                 restrictops = frontendDB->be_restrictops;
 905                 requires = frontendDB->be_requires;
 906                 ssf = &frontendDB->be_ssf_set;
 907         }
 908
 909         switch( op->o_tag ) {
 910         case LDAP_REQ_ADD:
 911                 opflag = SLAP_RESTRICT_OP_ADD;
 912                 updateop++;
 913                 break;
 914         case LDAP_REQ_BIND:
 915                 opflag = SLAP_RESTRICT_OP_BIND;
 916                 session++;
 917                 break;
 918         case LDAP_REQ_COMPARE:
 919                 opflag = SLAP_RESTRICT_OP_COMPARE;
 920                 break;
 921         case LDAP_REQ_DELETE:
 922                 updateop++;
 923                 opflag = SLAP_RESTRICT_OP_DELETE;
 924                 break;
 925         case LDAP_REQ_EXTENDED:
 926                 opflag = SLAP_RESTRICT_OP_EXTENDED;
 927
 928                 if( !opdata ) {
 929                         /* treat unspecified as a modify */
 930                         opflag = SLAP_RESTRICT_OP_MODIFY;
 931                         updateop++;
 932                         break;
 933                 }
 934
 935                 if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) {
 936                         session++;
 937                         starttls++;
 938                         exopflag = SLAP_RESTRICT_EXOP_START_TLS;
 939                         break;
 940                 }
 941
 942                 if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) {
 943                         exopflag = SLAP_RESTRICT_EXOP_WHOAMI;
 944                         break;
 945                 }
 946
 947                 if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) {
 948                         exopflag = SLAP_RESTRICT_EXOP_CANCEL;
 949                         break;
 950                 }
 951
 952                 if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) {
 953                         exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD;
 954                         updateop++;
 955                         break;
 956                 }
 957
 958                 /* treat everything else as a modify */
 959                 opflag = SLAP_RESTRICT_OP_MODIFY;
 960                 updateop++;
 961                 break;
 962
 963         case LDAP_REQ_MODIFY:
 964                 updateop++;
 965                 opflag = SLAP_RESTRICT_OP_MODIFY;
 966                 break;
 967         case LDAP_REQ_RENAME:
 968                 updateop++;
 969                 opflag = SLAP_RESTRICT_OP_RENAME;
 970                 break;
 971         case LDAP_REQ_SEARCH:
 972                 opflag = SLAP_RESTRICT_OP_SEARCH;
 973                 break;
 974         case LDAP_REQ_UNBIND:
 975                 session++;
 976                 opflag = 0;
 977                 break;
 978         default:
 979                 rs->sr_text = "restrict operations internal error";
 980                 rs->sr_err = LDAP_OTHER;
 981                 return rs->sr_err;
 982         }
 983
 984         if ( !starttls ) {
 985                 /* these checks don't apply to StartTLS */
 986
 987                 rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED;
 988                 if( op->o_transport_ssf < ssf->sss_transport ) {
 989                         rs->sr_text = op->o_transport_ssf
 990                                 ? "stronger transport confidentiality required"
 991                                 : "transport confidentiality required";
 992                         return rs->sr_err;
 993                 }
 994
 995                 if( op->o_tls_ssf < ssf->sss_tls ) {
 996                         rs->sr_text = op->o_tls_ssf
 997                                 ? "stronger TLS confidentiality required"
 998                                 : "TLS confidentiality required";
 999                         return rs->sr_err;
1000                 }
1001
1002
1003                 if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) {
1004                         /* simple bind specific check */
1005                         if( op->o_ssf < ssf->sss_simple_bind ) {
1006                                 rs->sr_text = op->o_ssf
1007                                         ? "stronger confidentiality required"
1008                                         : "confidentiality required";
1009                                 return rs->sr_err;
1010                         }
1011                 }
1012
1013                 if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) {
1014                         /* these checks don't apply to SASL bind */
1015
1016                         if( op->o_sasl_ssf < ssf->sss_sasl ) {
1017                                 rs->sr_text = op->o_sasl_ssf
1018                                         ? "stronger SASL confidentiality required"
1019                                         : "SASL confidentiality required";
1020                                 return rs->sr_err;
1021                         }
1022
1023                         if( op->o_ssf < ssf->sss_ssf ) {
1024                                 rs->sr_text = op->o_ssf
1025                                         ? "stronger confidentiality required"
1026                                         : "confidentiality required";
1027                                 return rs->sr_err;
1028                         }
1029                 }
1030
1031                 if( updateop ) {
1032                         if( op->o_transport_ssf < ssf->sss_update_transport ) {
1033                                 rs->sr_text = op->o_transport_ssf
1034                                         ? "stronger transport confidentiality required for update"
1035                                         : "transport confidentiality required for update";
1036                                 return rs->sr_err;
1037                         }
1038
1039                         if( op->o_tls_ssf < ssf->sss_update_tls ) {
1040                                 rs->sr_text = op->o_tls_ssf
1041                                         ? "stronger TLS confidentiality required for update"
1042                                         : "TLS confidentiality required for update";
1043                                 return rs->sr_err;
1044                         }
1045
1046                         if( op->o_sasl_ssf < ssf->sss_update_sasl ) {
1047                                 rs->sr_text = op->o_sasl_ssf
1048                                         ? "stronger SASL confidentiality required for update"
1049                                         : "SASL confidentiality required for update";
1050                                 return rs->sr_err;
1051                         }
1052
1053                         if( op->o_ssf < ssf->sss_update_ssf ) {
1054                                 rs->sr_text = op->o_ssf
1055                                         ? "stronger confidentiality required for update"
1056                                         : "confidentiality required for update";
1057                                 return rs->sr_err;
1058                         }
1059
1060                         if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) &&
1061                                 BER_BVISEMPTY( &op->o_ndn ) )
1062                         {
1063                                 rs->sr_text = "modifications require authentication";
1064                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1065                                 return rs->sr_err;
1066                         }
1067
1068 #ifdef SLAP_X_LISTENER_MOD
1069                         if ( op->o_conn->c_listener &&
1070                                 ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn )
1071                                         ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) )
1072                         {
1073                                 /* no "w" mode means readonly */
1074                                 rs->sr_text = "modifications not allowed on this listener";
1075                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1076                                 return rs->sr_err;
1077                         }
1078 #endif /* SLAP_X_LISTENER_MOD */
1079                 }
1080         }
1081
1082         if ( !session ) {
1083                 /* these checks don't apply to Bind, StartTLS, or Unbind */
1084
1085                 if( requires & SLAP_REQUIRE_STRONG ) {
1086                         /* should check mechanism */
1087                         if( ( op->o_transport_ssf < ssf->sss_transport
1088                                 && op->o_authtype == LDAP_AUTH_SIMPLE )
1089                                 || BER_BVISEMPTY( &op->o_dn ) )
1090                         {
1091                                 rs->sr_text = "strong(er) authentication required";
1092                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1093                                 return rs->sr_err;
1094                         }
1095                 }
1096
1097                 if( requires & SLAP_REQUIRE_SASL ) {
1098                         if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) {
1099                                 rs->sr_text = "SASL authentication required";
1100                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1101                                 return rs->sr_err;
1102                         }
1103                 }
1104
1105                 if( requires & SLAP_REQUIRE_AUTHC ) {
1106                         if( BER_BVISEMPTY( &op->o_dn ) ) {
1107                                 rs->sr_text = "authentication required";
1108                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1109                                 return rs->sr_err;
1110                         }
1111                 }
1112
1113                 if( requires & SLAP_REQUIRE_BIND ) {
1114                         int version;
1115                         ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
1116                         version = op->o_conn->c_protocol;
1117                         ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
1118
1119                         if( !version ) {
1120                                 /* no bind has occurred */
1121                                 rs->sr_text = "BIND required";
1122                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1123                                 return rs->sr_err;
1124                         }
1125                 }
1126
1127                 if( requires & SLAP_REQUIRE_LDAP_V3 ) {
1128                         if( op->o_protocol < LDAP_VERSION3 ) {
1129                                 /* no bind has occurred */
1130                                 rs->sr_text = "operation restricted to LDAPv3 clients";
1131                                 rs->sr_err = LDAP_OPERATIONS_ERROR;
1132                                 return rs->sr_err;
1133                         }
1134                 }
1135
1136 #ifdef SLAP_X_LISTENER_MOD
1137                 if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) {
1138                         if ( op->o_conn->c_listener &&
1139                                 !( op->o_conn->c_listener->sl_perms & S_IXOTH ))
1140                 {
1141                                 /* no "x" mode means bind required */
1142                                 rs->sr_text = "bind required on this listener";
1143                                 rs->sr_err = LDAP_STRONG_AUTH_REQUIRED;
1144                                 return rs->sr_err;
1145                         }
1146                 }
1147
1148                 if ( !starttls && !updateop ) {
1149                         if ( op->o_conn->c_listener &&
1150                                 !( op->o_conn->c_listener->sl_perms &
1151                                         ( !BER_BVISEMPTY( &op->o_dn )
1152                                                 ? (S_IRUSR|S_IROTH) : S_IROTH )))
1153                         {
1154                                 /* no "r" mode means no read */
1155                                 rs->sr_text = "read not allowed on this listener";
1156                                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1157                                 return rs->sr_err;
1158                         }
1159                 }
1160 #endif /* SLAP_X_LISTENER_MOD */
1161
1162         }
1163
1164         if( ( restrictops & opflag )
1165                         || ( exopflag && ( restrictops & exopflag ) ) ) {
1166                 if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) {
1167                         rs->sr_text = "read operations restricted";
1168                 } else if ( restrictops & exopflag ) {
1169                         rs->sr_text = "extended operation restricted";
1170                 } else {
1171                         rs->sr_text = "operation restricted";
1172                 }
1173                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1174                 return rs->sr_err;
1175         }
1176
1177         rs->sr_err = LDAP_SUCCESS;
1178         return rs->sr_err;
1179 }
1180
1181 int backend_check_referrals( Operation *op, SlapReply *rs )
1182 {
1183         rs->sr_err = LDAP_SUCCESS;
1184
1185         if( op->o_bd->be_chk_referrals ) {
1186                 rs->sr_err = op->o_bd->be_chk_referrals( op, rs );
1187
1188                 if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) {
1189                         send_ldap_result( op, rs );
1190                 }
1191         }
1192
1193         return rs->sr_err;
1194 }
1195
1196 int
1197 be_entry_get_rw(
1198         Operation *op,
1199         struct berval *ndn,
1200         ObjectClass *oc,
1201         AttributeDescription *at,
1202         int rw,
1203         Entry **e )
1204 {
1205         int rc;
1206
1207         *e = NULL;
1208
1209         if (op->o_bd == NULL) {
1210                 rc = LDAP_NO_SUCH_OBJECT;
1211         } else if ( op->o_bd->be_fetch ) {
1212                 rc = ( op->o_bd->be_fetch )( op, ndn,
1213                         oc, at, rw, e );
1214         } else {
1215                 rc = LDAP_UNWILLING_TO_PERFORM;
1216         }
1217         return rc;
1218 }
1219
1220 int
1221 backend_group(
1222         Operation *op,
1223         Entry   *target,
1224         struct berval *gr_ndn,
1225         struct berval *op_ndn,
1226         ObjectClass *group_oc,
1227         AttributeDescription *group_at )
1228 {
1229         Entry *e;
1230         Attribute *a;
1231         int rc;
1232         GroupAssertion *g;
1233         Backend *be = op->o_bd;
1234
1235         if ( op->o_abandon ) return SLAPD_ABANDON;
1236
1237         op->o_bd = select_backend( gr_ndn, 0, 0 );
1238
1239         for ( g = op->o_groups; g; g = g->ga_next ) {
1240                 if ( g->ga_be != op->o_bd || g->ga_oc != group_oc ||
1241                         g->ga_at != group_at || g->ga_len != gr_ndn->bv_len )
1242                 {
1243                         continue;
1244                 }
1245                 if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) {
1246                         break;
1247                 }
1248         }
1249
1250         if ( g ) {
1251                 rc = g->ga_res;
1252                 goto done;
1253         }
1254
1255         if ( target && dn_match( &target->e_nname, gr_ndn ) ) {
1256                 e = target;
1257                 rc = 0;
1258         } else {
1259                 rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e );
1260         }
1261         if ( e ) {
1262 #ifdef LDAP_SLAPI
1263                 if ( op->o_pb != NULL ) {
1264                         init_group_pblock( op, target, e, op_ndn, group_at );
1265
1266                         rc = call_group_preop_plugins( op );
1267                         if ( rc == LDAP_SUCCESS ) {
1268                                 goto done;
1269                         }
1270                 }
1271 #endif /* LDAP_SLAPI */
1272
1273                 a = attr_find( e->e_attrs, group_at );
1274                 if ( a ) {
1275                         /* If the attribute is a subtype of labeledURI, treat this as
1276                          * a dynamic group ala groupOfURLs
1277                          */
1278                         if (is_at_subtype( group_at->ad_type,
1279                                 slap_schema.si_ad_labeledURI->ad_type ) )
1280                         {
1281                                 int i;
1282                                 LDAPURLDesc *ludp;
1283                                 struct berval bv, nbase;
1284                                 Filter *filter;
1285                                 Entry *user;
1286                                 Backend *b2 = op->o_bd;
1287
1288                                 if ( target && dn_match( &target->e_nname, op_ndn ) ) {
1289                                         user = target;
1290                                 } else {
1291                                         op->o_bd = select_backend( op_ndn, 0, 0 );
1292                                         rc = be_entry_get_rw(op, op_ndn, NULL, NULL, 0, &user );
1293                                 }
1294
1295                                 if ( rc == 0 ) {
1296                                         rc = LDAP_COMPARE_FALSE;
1297                                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1298                                                 if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) !=
1299                                                         LDAP_URL_SUCCESS )
1300                                                 {
1301                                                         continue;
1302                                                 }
1303                                                 BER_BVZERO( &nbase );
1304                                                 /* host part must be empty */
1305                                                 /* attrs and extensions parts must be empty */
1306                                                 if ( ( ludp->lud_host && *ludp->lud_host ) ||
1307                                                         ludp->lud_attrs || ludp->lud_exts )
1308                                                 {
1309                                                         goto loopit;
1310                                                 }
1311                                                 ber_str2bv( ludp->lud_dn, 0, 0, &bv );
1312                                                 if ( dnNormalize( 0, NULL, NULL, &bv, &nbase,
1313                                                         op->o_tmpmemctx ) != LDAP_SUCCESS )
1314                                                 {
1315                                                         goto loopit;
1316                                                 }
1317                                                 switch ( ludp->lud_scope ) {
1318                                                 case LDAP_SCOPE_BASE:
1319                                                         if ( !dn_match( &nbase, op_ndn ) ) {
1320                                                                 goto loopit;
1321                                                         }
1322                                                         break;
1323                                                 case LDAP_SCOPE_ONELEVEL:
1324                                                         dnParent( op_ndn, &bv );
1325                                                         if ( !dn_match( &nbase, &bv ) ) {
1326                                                                 goto loopit;
1327                                                         }
1328                                                         break;
1329                                                 case LDAP_SCOPE_SUBTREE:
1330                                                         if ( !dnIsSuffix( op_ndn, &nbase ) ) {
1331                                                                 goto loopit;
1332                                                         }
1333                                                         break;
1334 #ifdef LDAP_SCOPE_SUBORDINATE
1335                                                 case LDAP_SCOPE_SUBORDINATE:
1336                                                         if ( dn_match( &nbase, op_ndn ) ||
1337                                                                 !dnIsSuffix( op_ndn, &nbase ) )
1338                                                         {
1339                                                                 goto loopit;
1340                                                         }
1341 #endif
1342                                                 }
1343                                                 filter = str2filter_x( op, ludp->lud_filter );
1344                                                 if ( filter ) {
1345                                                         if ( test_filter( NULL, user, filter ) ==
1346                                                                 LDAP_COMPARE_TRUE )
1347                                                         {
1348                                                                 rc = 0;
1349                                                         }
1350                                                         filter_free_x( op, filter );
1351                                                 }
1352 loopit:
1353                                                 ldap_free_urldesc( ludp );
1354                                                 if ( !BER_BVISNULL( &nbase ) ) {
1355                                                         op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx );
1356                                                 }
1357                                                 if ( rc == 0 ) break;
1358                                         }
1359                                         if ( user != target ) {
1360                                                 be_entry_release_r( op, user );
1361                                         }
1362                                 }
1363                                 op->o_bd = b2;
1364                         } else {
1365                                 rc = value_find_ex( group_at,
1366                                 SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
1367                                 SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
1368                                 a->a_nvals, op_ndn, op->o_tmpmemctx );
1369                                 if ( rc == LDAP_NO_SUCH_ATTRIBUTE )
1370                                         rc = LDAP_COMPARE_FALSE;
1371                         }
1372                 } else {
1373                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1374                 }
1375                 if (e != target ) {
1376                         be_entry_release_r( op, e );
1377                 }
1378         } else {
1379                 rc = LDAP_NO_SUCH_OBJECT;
1380         }
1381
1382 #ifdef LDAP_SLAPI
1383         if ( op->o_pb ) call_group_postop_plugins( op );
1384 #endif /* LDAP_SLAPI */
1385
1386         if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) {
1387                 g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len,
1388                         op->o_tmpmemctx );
1389                 g->ga_be = op->o_bd;
1390                 g->ga_oc = group_oc;
1391                 g->ga_at = group_at;
1392                 g->ga_res = rc;
1393                 g->ga_len = gr_ndn->bv_len;
1394                 strcpy( g->ga_ndn, gr_ndn->bv_val );
1395                 g->ga_next = op->o_groups;
1396                 op->o_groups = g;
1397         }
1398 done:
1399         op->o_bd = be;
1400         return rc;
1401 }
1402
1403 #ifdef LDAP_SLAPI
1404 static int backend_compute_output_attr(computed_attr_context *c, Slapi_Attr *a, Slapi_Entry *e)
1405 {
1406         BerVarray v;
1407         int rc;
1408         BerVarray *vals = (BerVarray *)c->cac_private;
1409         Operation *op = NULL;
1410         int i, j;
1411
1412         slapi_pblock_get( c->cac_pb, SLAPI_OPERATION, &op );
1413         if ( op == NULL ) {
1414                 return 1;
1415         }
1416
1417         if ( op->o_conn && access_allowed( op,
1418                 e, a->a_desc, NULL, ACL_AUTH,
1419                 &c->cac_acl_state ) == 0 ) {
1420                 return 1;
1421         }
1422
1423         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) ;
1424
1425         v = op->o_tmpalloc( sizeof(struct berval) * (i+1),
1426                 op->o_tmpmemctx );
1427         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) {
1428                 if ( op->o_conn && access_allowed( op,
1429                         e, a->a_desc,
1430                         &a->a_nvals[i],
1431                         ACL_AUTH, &c->cac_acl_state ) == 0 ) {
1432                         continue;
1433                 }
1434                 ber_dupbv_x( &v[j],
1435                         &a->a_nvals[i], op->o_tmpmemctx );
1436                 if ( !BER_BVISNULL( &v[j] ) ) {
1437                         j++;
1438                 }
1439         }
1440
1441         if ( j == 0 ) {
1442                 op->o_tmpfree( v, op->o_tmpmemctx );
1443                 *vals = NULL;
1444                 rc = 1;
1445         } else {
1446                 BER_BVZERO( &v[j] );
1447                 *vals = v;
1448                 rc = 0;
1449         }
1450
1451         return rc;
1452 }
1453 #endif /* LDAP_SLAPI */
1454
1455 int
1456 backend_attribute(
1457         Operation *op,
1458         Entry   *target,
1459         struct berval   *edn,
1460         AttributeDescription *entry_at,
1461         BerVarray *vals,
1462         slap_access_t access )
1463 {
1464         Entry                   *e = NULL;
1465         Attribute               *a = NULL;
1466         int                     freeattr = 0, i, j, rc = LDAP_SUCCESS;
1467         AccessControlState      acl_state = ACL_STATE_INIT;
1468         Backend                 *be = op->o_bd;
1469
1470         op->o_bd = select_backend( edn, 0, 0 );
1471
1472         if ( target && dn_match( &target->e_nname, edn ) ) {
1473                 e = target;
1474
1475         } else {
1476                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1477         }
1478
1479         if ( e ) {
1480                 a = attr_find( e->e_attrs, entry_at );
1481                 if ( a == NULL ) {
1482                         SlapReply       rs = { 0 };
1483                         AttributeName   anlist[ 2 ];
1484
1485                         anlist[ 0 ].an_name = entry_at->ad_cname;
1486                         anlist[ 0 ].an_desc = entry_at;
1487                         BER_BVZERO( &anlist[ 1 ].an_name );
1488                         rs.sr_attrs = anlist;
1489
1490                         /* NOTE: backend_operational() is also called
1491                          * when returning results, so it's supposed
1492                          * to do no harm to entries */
1493                         rs.sr_entry = e;
1494                         rc = backend_operational( op, &rs );
1495                         rs.sr_entry = NULL;
1496
1497                         if ( rc == LDAP_SUCCESS ) {
1498                                 if ( rs.sr_operational_attrs ) {
1499                                         freeattr = 1;
1500                                         a = rs.sr_operational_attrs;
1501
1502                                 } else {
1503                                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1504                                 }
1505                         }
1506                 }
1507
1508                 if ( a ) {
1509                         BerVarray v;
1510
1511                         if ( op->o_conn && access > ACL_NONE &&
1512                                 access_allowed( op, e, entry_at, NULL,
1513                                                 access, &acl_state ) == 0 )
1514                         {
1515                                 rc = LDAP_INSUFFICIENT_ACCESS;
1516                                 goto freeit;
1517                         }
1518
1519                         for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1520                                 ;
1521
1522                         v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ),
1523                                 op->o_tmpmemctx );
1524                         for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ )
1525                         {
1526                                 if ( op->o_conn && access > ACL_NONE &&
1527                                         access_allowed( op, e, entry_at,
1528                                                         &a->a_nvals[i],
1529                                                         access,
1530                                                         &acl_state ) == 0 )
1531                                 {
1532                                         continue;
1533                                 }
1534                                 ber_dupbv_x( &v[j], &a->a_nvals[i],
1535                                                 op->o_tmpmemctx );
1536                                 if ( !BER_BVISNULL( &v[j] ) ) {
1537                                         j++;
1538                                 }
1539                         }
1540                         if ( j == 0 ) {
1541                                 op->o_tmpfree( v, op->o_tmpmemctx );
1542                                 *vals = NULL;
1543                                 rc = LDAP_INSUFFICIENT_ACCESS;
1544
1545                         } else {
1546                                 BER_BVZERO( &v[j] );
1547                                 *vals = v;
1548                                 rc = LDAP_SUCCESS;
1549                         }
1550                 }
1551 #ifdef LDAP_SLAPI
1552                 else if ( op->o_pb ) {
1553                         /* try any computed attributes */
1554                         computed_attr_context   ctx;
1555
1556                         slapi_int_pblock_set_operation( op->o_pb, op );
1557
1558                         ctx.cac_pb = op->o_pb;
1559                         ctx.cac_attrs = NULL;
1560                         ctx.cac_userattrs = 0;
1561                         ctx.cac_opattrs = 0;
1562                         ctx.cac_acl_state = acl_state;
1563                         ctx.cac_private = (void *)vals;
1564
1565                         rc = compute_evaluator( &ctx, entry_at->ad_cname.bv_val, e, backend_compute_output_attr );
1566                         if ( rc == 1 ) {
1567                                 rc = LDAP_INSUFFICIENT_ACCESS;
1568
1569                         } else {
1570                                 rc = LDAP_SUCCESS;
1571                         }
1572                 }
1573 #endif /* LDAP_SLAPI */
1574 freeit:         if ( e != target ) {
1575                         be_entry_release_r( op, e );
1576                 }
1577                 if ( freeattr ) {
1578                         attr_free( a );
1579                 }
1580         }
1581
1582         op->o_bd = be;
1583         return rc;
1584 }
1585
1586 #ifdef LDAP_SLAPI
1587 static int backend_compute_output_attr_access(computed_attr_context *c, Slapi_Attr *a, Slapi_Entry *e)
1588 {
1589         struct berval   *nval = (struct berval *)c->cac_private;
1590         Operation       *op = NULL;
1591
1592         slapi_pblock_get( c->cac_pb, SLAPI_OPERATION, &op );
1593         if ( op == NULL ) {
1594                 return 1;
1595         }
1596
1597         return access_allowed( op, e, a->a_desc, nval, ACL_AUTH, NULL ) == 0;
1598 }
1599 #endif /* LDAP_SLAPI */
1600
1601 int
1602 backend_access(
1603         Operation               *op,
1604         Entry                   *target,
1605         struct berval           *edn,
1606         AttributeDescription    *entry_at,
1607         struct berval           *nval,
1608         slap_access_t           access,
1609         slap_mask_t             *mask )
1610 {
1611         Entry           *e = NULL;
1612         int             rc = LDAP_INSUFFICIENT_ACCESS;
1613         Backend         *be = op->o_bd;
1614
1615         /* pedantic */
1616         assert( op );
1617         assert( op->o_conn );
1618         assert( edn );
1619         assert( access > ACL_NONE );
1620
1621         op->o_bd = select_backend( edn, 0, 0 );
1622
1623         if ( target && dn_match( &target->e_nname, edn ) ) {
1624                 e = target;
1625
1626         } else {
1627                 rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e );
1628         }
1629
1630         if ( e ) {
1631                 Attribute       *a = NULL;
1632                 int             freeattr = 0;
1633
1634                 if ( entry_at == NULL ) {
1635                         entry_at = slap_schema.si_ad_entry;
1636                 }
1637
1638                 if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children )
1639                 {
1640                         if ( access_allowed_mask( op, e, entry_at,
1641                                         NULL, access, NULL, mask ) == 0 )
1642                         {
1643                                 rc = LDAP_INSUFFICIENT_ACCESS;
1644
1645                         } else {
1646                                 rc = LDAP_SUCCESS;
1647                         }
1648
1649                 } else {
1650                         a = attr_find( e->e_attrs, entry_at );
1651                         if ( a == NULL ) {
1652                                 SlapReply       rs = { 0 };
1653                                 AttributeName   anlist[ 2 ];
1654
1655                                 anlist[ 0 ].an_name = entry_at->ad_cname;
1656                                 anlist[ 0 ].an_desc = entry_at;
1657                                 BER_BVZERO( &anlist[ 1 ].an_name );
1658                                 rs.sr_attrs = anlist;
1659
1660                                 rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs );
1661
1662                                 /* NOTE: backend_operational() is also called
1663                                  * when returning results, so it's supposed
1664                                  * to do no harm to entries */
1665                                 rs.sr_entry = e;
1666                                 rc = backend_operational( op, &rs );
1667                                 rs.sr_entry = NULL;
1668
1669                                 if ( rc == LDAP_SUCCESS ) {
1670                                         if ( rs.sr_operational_attrs ) {
1671                                                 freeattr = 1;
1672                                                 a = rs.sr_operational_attrs;
1673
1674                                         } else {
1675                                                 rc = LDAP_NO_SUCH_OBJECT;
1676                                         }
1677                                 }
1678                         }
1679
1680                         if ( a ) {
1681                                 if ( access_allowed_mask( op, e, entry_at,
1682                                                 nval, access, NULL, mask ) == 0 )
1683                                 {
1684                                         rc = LDAP_INSUFFICIENT_ACCESS;
1685                                         goto freeit;
1686                                 }
1687                                 rc = LDAP_SUCCESS;
1688                         }
1689 #ifdef LDAP_SLAPI
1690                         else if ( op->o_pb ) {
1691                                 /* try any computed attributes */
1692                                 computed_attr_context   ctx;
1693
1694                                 slapi_int_pblock_set_operation( op->o_pb, op );
1695
1696                                 ctx.cac_pb = op->o_pb;
1697                                 ctx.cac_attrs = NULL;
1698                                 ctx.cac_userattrs = 0;
1699                                 ctx.cac_opattrs = 0;
1700                                 ctx.cac_private = (void *)nval;
1701
1702                                 rc = compute_evaluator( &ctx, entry_at->ad_cname.bv_val, e, backend_compute_output_attr_access );
1703                                 if ( rc == 1 ) {
1704                                         rc = LDAP_INSUFFICIENT_ACCESS;
1705
1706                                 } else {
1707                                         rc = LDAP_SUCCESS;
1708                                 }
1709                         }
1710 #endif /* LDAP_SLAPI */
1711                 }
1712 freeit:         if ( e != target ) {
1713                         be_entry_release_r( op, e );
1714                 }
1715                 if ( freeattr ) {
1716                         attr_free( a );
1717                 }
1718         }
1719
1720         op->o_bd = be;
1721         return rc;
1722 }
1723
1724 int backend_operational(
1725         Operation *op,
1726         SlapReply *rs )
1727 {
1728         Attribute       **ap;
1729         int             rc = 0;
1730         BackendDB       *be_orig;
1731
1732         for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next )
1733                 /* just count them */ ;
1734
1735         /*
1736          * If operational attributes (allegedly) are required,
1737          * and the backend supports specific operational attributes,
1738          * add them to the attribute list
1739          */
1740         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1741                 ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) )
1742         {
1743                 *ap = slap_operational_entryDN( rs->sr_entry );
1744                 ap = &(*ap)->a_next;
1745         }
1746
1747         if ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs &&
1748                 ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) )
1749         {
1750                 *ap = slap_operational_subschemaSubentry( op->o_bd );
1751                 ap = &(*ap)->a_next;
1752         }
1753
1754         /* Let the overlays have a chance at this */
1755         be_orig = op->o_bd;
1756         if ( SLAP_ISOVERLAY( be_orig ) )
1757                 op->o_bd = select_backend( be_orig->be_nsuffix, 0, 0 );
1758
1759         if ( ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) &&
1760                 op->o_bd && op->o_bd->be_operational != NULL )
1761         {
1762                 rc = op->o_bd->be_operational( op, rs );
1763         }
1764         op->o_bd = be_orig;
1765
1766         return rc;
1767 }
1768
1769 #ifdef LDAP_SLAPI
1770 static void init_group_pblock( Operation *op, Entry *target,
1771         Entry *e, struct berval *op_ndn, AttributeDescription *group_at )
1772 {
1773         slapi_int_pblock_set_operation( op->o_pb, op );
1774
1775         slapi_pblock_set( op->o_pb,
1776                 SLAPI_X_GROUP_ENTRY, (void *)e );
1777         slapi_pblock_set( op->o_pb,
1778                 SLAPI_X_GROUP_OPERATION_DN, (void *)op_ndn->bv_val );
1779         slapi_pblock_set( op->o_pb,
1780                 SLAPI_X_GROUP_ATTRIBUTE, (void *)group_at->ad_cname.bv_val );
1781         slapi_pblock_set( op->o_pb,
1782                 SLAPI_X_GROUP_TARGET_ENTRY, (void *)target );
1783 }
1784
1785 static int call_group_preop_plugins( Operation *op )
1786 {
1787         int rc;
1788
1789         rc = slapi_int_call_plugins( op->o_bd,
1790                 SLAPI_X_PLUGIN_PRE_GROUP_FN, op->o_pb );
1791         if ( rc < 0 ) {
1792                 if (( slapi_pblock_get( op->o_pb, SLAPI_RESULT_CODE,
1793                         (void *)&rc ) != 0 ) || rc == LDAP_SUCCESS )
1794                 {
1795                         rc = LDAP_NO_SUCH_ATTRIBUTE;
1796                 }
1797         } else {
1798                 rc = LDAP_SUCCESS;
1799         }
1800
1801         return rc;
1802 }
1803
1804 static void call_group_postop_plugins( Operation *op )
1805 {
1806         (void) slapi_int_call_plugins( op->o_bd, SLAPI_X_PLUGIN_POST_GROUP_FN, op->o_pb );
1807 }
1808 #endif /* LDAP_SLAPI */
1809