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