git.sur5r.net Git - openldap/blob - servers/slapd/back-meta/bind.c

   1 /* $OpenLDAP$ */
   2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   3  *
   4  * Copyright 1999-2007 The OpenLDAP Foundation.
   5  * Portions Copyright 2001-2003 Pierangelo Masarati.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by the Howard Chu for inclusion
  19  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  20  * Masarati.
  21  */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26
  27 #include <ac/errno.h>
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30
  31
  32 #define AVL_INTERNAL
  33 #include "slap.h"
  34 #include "../back-ldap/back-ldap.h"
  35 #include "back-meta.h"
  36 #undef ldap_debug       /* silence a warning in ldap-int.h */
  37 #include "../../../libraries/libldap/ldap-int.h"
  38
  39 #include "lutil_ldap.h"
  40
  41 static int
  42 meta_back_proxy_authz_bind(
  43         metaconn_t              *mc,
  44         int                     candidate,
  45         Operation               *op,
  46         SlapReply               *rs,
  47         ldap_back_send_t        sendok );
  48
  49 static int
  50 meta_back_single_bind(
  51         Operation               *op,
  52         SlapReply               *rs,
  53         metaconn_t              *mc,
  54         int                     candidate );
  55
  56 int
  57 meta_back_bind( Operation *op, SlapReply *rs )
  58 {
  59         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
  60         metaconn_t      *mc = NULL;
  61
  62         int             rc = LDAP_OTHER,
  63                         i,
  64                         gotit = 0,
  65                         isroot = 0;
  66
  67         SlapReply       *candidates = meta_back_candidates_get( op );
  68
  69         rs->sr_err = LDAP_SUCCESS;
  70
  71         Debug( LDAP_DEBUG_ARGS, "%s meta_back_bind: dn=\"%s\".\n",
  72                 op->o_log_prefix, op->o_req_dn.bv_val, 0 );
  73
  74         /* the test on the bind method should be superfluous */
  75         if ( op->orb_method == LDAP_AUTH_SIMPLE
  76                 && be_isroot_dn( op->o_bd, &op->o_req_ndn ) )
  77         {
  78                 if ( !be_isroot_pw( op ) ) {
  79                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  80                         rs->sr_text = NULL;
  81                         send_ldap_result( op, rs );
  82                         return rs->sr_err;
  83                 }
  84
  85                 if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
  86                         rs->sr_err = LDAP_SUCCESS;
  87                         rs->sr_text = NULL;
  88                         /* frontend will return success */
  89                         return rs->sr_err;
  90                 }
  91
  92                 isroot = 1;
  93         }
  94
  95         /* we need meta_back_getconn() not send result even on error,
  96          * because we want to intercept the error and make it
  97          * invalidCredentials */
  98         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_BIND_DONTSEND );
  99         if ( !mc ) {
 100                 if ( StatslogTest( LDAP_DEBUG_ANY ) ) {
 101                         char    buf[ SLAP_TEXT_BUFLEN ];
 102
 103                         snprintf( buf, sizeof( buf ),
 104                                 "meta_back_bind: no target "
 105                                 "for dn \"%s\" (%d%s%s).",
 106                                 op->o_req_dn.bv_val, rs->sr_err,
 107                                 rs->sr_text ? ". " : "",
 108                                 rs->sr_text ? rs->sr_text : "" );
 109                         Debug( LDAP_DEBUG_ANY,
 110                                 "%s %s\n",
 111                                 op->o_log_prefix, buf, 0 );
 112                 }
 113
 114                 /* FIXME: there might be cases where we don't want
 115                  * to map the error onto invalidCredentials */
 116                 switch ( rs->sr_err ) {
 117                 case LDAP_NO_SUCH_OBJECT:
 118                 case LDAP_UNWILLING_TO_PERFORM:
 119                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 120                         rs->sr_text = NULL;
 121                         break;
 122                 }
 123                 send_ldap_result( op, rs );
 124                 return rs->sr_err;
 125         }
 126
 127         /*
 128          * Each target is scanned ...
 129          */
 130         mc->mc_authz_target = META_BOUND_NONE;
 131         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 132                 metatarget_t    *mt = mi->mi_targets[ i ];
 133                 int             lerr;
 134
 135                 /*
 136                  * Skip non-candidates
 137                  */
 138                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 139                         continue;
 140                 }
 141
 142                 if ( gotit == 0 ) {
 143                         /* set rc to LDAP_SUCCESS only if at least
 144                          * one candidate has been tried */
 145                         rc = LDAP_SUCCESS;
 146                         gotit = 1;
 147
 148                 } else if ( isroot == 0 ) {
 149                         /*
 150                          * A bind operation is expected to have
 151                          * ONE CANDIDATE ONLY!
 152                          */
 153                         Debug( LDAP_DEBUG_ANY,
 154                                 "### %s meta_back_bind: more than one"
 155                                 " candidate selected...\n",
 156                                 op->o_log_prefix, 0, 0 );
 157                 }
 158
 159                 if ( isroot ) {
 160                         if ( mt->mt_idassert_authmethod == LDAP_AUTH_NONE
 161                                 || BER_BVISNULL( &mt->mt_idassert_authcDN ) )
 162                         {
 163                                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 164
 165                                 /* skip the target if no pseudorootdn is provided */
 166                                 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 167                                         ch_free( msc->msc_bound_ndn.bv_val );
 168                                         BER_BVZERO( &msc->msc_bound_ndn );
 169                                 }
 170
 171                                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 172                                         /* destroy sensitive data */
 173                                         memset( msc->msc_cred.bv_val, 0,
 174                                                 msc->msc_cred.bv_len );
 175                                         ch_free( msc->msc_cred.bv_val );
 176                                         BER_BVZERO( &msc->msc_cred );
 177                                 }
 178
 179                                 continue;
 180                         }
 181
 182
 183                         (void)meta_back_proxy_authz_bind( mc, i, op, rs, LDAP_BACK_DONTSEND );
 184                         lerr = rs->sr_err;
 185
 186                 } else {
 187                         lerr = meta_back_single_bind( op, rs, mc, i );
 188                 }
 189
 190                 if ( lerr != LDAP_SUCCESS ) {
 191                         rc = rs->sr_err = lerr;
 192                         /* FIXME: in some cases (e.g. unavailable)
 193                          * do not assume it's not candidate; rather
 194                          * mark this as an error to be eventually
 195                          * reported to client */
 196                         META_CANDIDATE_CLEAR( &candidates[ i ] );
 197                         break;
 198                 }
 199         }
 200
 201         /* must re-insert if local DN changed as result of bind */
 202         if ( rc == LDAP_SUCCESS ) {
 203                 if ( isroot ) {
 204                         mc->mc_authz_target = META_BOUND_ALL;
 205                         ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
 206                 }
 207
 208                 if ( !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) ) {
 209                         metaconn_t      *tmpmc;
 210                         int             lerr;
 211
 212                         /* wait for all other ops to release the connection */
 213 retry_lock:;
 214                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 215                         if ( mc->mc_refcnt > 1 ) {
 216                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 217                                 ldap_pvt_thread_yield();
 218                                 goto retry_lock;
 219                         }
 220
 221                         assert( mc->mc_refcnt == 1 );
 222 #if META_BACK_PRINT_CONNTREE > 0
 223                         meta_back_print_conntree( mi, ">>> meta_back_bind" );
 224 #endif /* META_BACK_PRINT_CONNTREE */
 225                         tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 226                                 meta_back_conndn_cmp );
 227                         assert( tmpmc == mc );
 228
 229                         /* delete all cached connections with the current connection */
 230                         if ( LDAP_BACK_SINGLECONN( mi ) ) {
 231                                 while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
 232                                 {
 233                                         Debug( LDAP_DEBUG_TRACE,
 234                                                 "=>meta_back_bind: destroying conn %ld (refcnt=%u)\n",
 235                                                 LDAP_BACK_PCONN_ID( mc ), mc->mc_refcnt, 0 );
 236
 237                                         if ( tmpmc->mc_refcnt != 0 ) {
 238                                                 /* taint it */
 239                                                 LDAP_BACK_CONN_TAINTED_SET( tmpmc );
 240
 241                                         } else {
 242                                                 /*
 243                                                  * Needs a test because the handler may be corrupted,
 244                                                  * and calling ldap_unbind on a corrupted header results
 245                                                  * in a segmentation fault
 246                                                  */
 247                                                 meta_back_conn_free( tmpmc );
 248                                         }
 249                                 }
 250                         }
 251
 252                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 253                         if ( isroot ) {
 254                                 LDAP_BACK_CONN_ISPRIV_SET( mc );
 255                                 LDAP_BACK_PCONN_SET( mc, op );
 256                         }
 257                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 258                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 259 #if META_BACK_PRINT_CONNTREE > 0
 260                         meta_back_print_conntree( mi, "<<< meta_back_bind" );
 261 #endif /* META_BACK_PRINT_CONNTREE */
 262                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 263                         if ( lerr == -1 ) {
 264                                 /* we can do this because mc_refcnt == 1 */
 265                                 assert( mc->mc_refcnt == 1 );
 266                                 mc->mc_refcnt = 0;
 267                                 meta_back_conn_free( mc );
 268                                 mc = NULL;
 269                         }
 270                 }
 271         }
 272
 273         if ( mc != NULL ) {
 274                 meta_back_release_conn( op, mc );
 275         }
 276
 277         /*
 278          * rc is LDAP_SUCCESS if at least one bind succeeded,
 279          * err is the last error that occurred during a bind;
 280          * if at least (and at most?) one bind succeeds, fine.
 281          */
 282         if ( rc != LDAP_SUCCESS ) {
 283
 284                 /*
 285                  * deal with bind failure ...
 286                  */
 287
 288                 /*
 289                  * no target was found within the naming context,
 290                  * so bind must fail with invalid credentials
 291                  */
 292                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 293                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 294                 } else {
 295                         rs->sr_err = slap_map_api2result( rs );
 296                 }
 297                 send_ldap_result( op, rs );
 298                 return rs->sr_err;
 299
 300         }
 301
 302         return LDAP_SUCCESS;
 303 }
 304
 305 static int
 306 meta_back_bind_op_result(
 307         Operation               *op,
 308         SlapReply               *rs,
 309         metaconn_t              *mc,
 310         int                     candidate,
 311         int                     msgid,
 312         ldap_back_send_t        sendok )
 313 {
 314         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 315         metatarget_t            *mt = mi->mi_targets[ candidate ];
 316         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 317         LDAPMessage             *res;
 318         struct timeval          tv;
 319         int                     rc;
 320         int                     nretries = mt->mt_nretries;
 321         char                    buf[ SLAP_TEXT_BUFLEN ];
 322
 323         Debug( LDAP_DEBUG_TRACE,
 324                 ">>> %s meta_back_bind_op_result[%d]\n",
 325                 op->o_log_prefix, candidate, 0 );
 326
 327         if ( rs->sr_err == LDAP_SUCCESS ) {
 328                 time_t          stoptime = (time_t)(-1),
 329                                 timeout;
 330                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 331                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 332                 const char      *timeout_text = "Operation timed out";
 333                 slap_op_t       opidx = slap_req2op( op->o_tag );
 334
 335                 /* since timeout is not specified, compute and use
 336                  * the one specific to the ongoing operation */
 337                 if ( opidx == LDAP_REQ_SEARCH ) {
 338                         if ( op->ors_tlimit <= 0 ) {
 339                                 timeout = 0;
 340
 341                         } else {
 342                                 timeout = op->ors_tlimit;
 343                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 344                                 timeout_text = NULL;
 345                         }
 346
 347                 } else {
 348                         timeout = mt->mt_timeout[ opidx ];
 349                 }
 350
 351                 /* better than nothing :) */
 352                 if ( timeout == 0 ) {
 353                         if ( mi->mi_idle_timeout ) {
 354                                 timeout = mi->mi_idle_timeout;
 355
 356                         } else if ( mi->mi_conn_ttl ) {
 357                                 timeout = mi->mi_conn_ttl;
 358                         }
 359                 }
 360
 361                 if ( timeout ) {
 362                         stoptime = op->o_time + timeout;
 363                 }
 364
 365                 LDAP_BACK_TV_SET( &tv );
 366
 367                 /*
 368                  * handle response!!!
 369                  */
 370 retry:;
 371                 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 372                 switch ( rc ) {
 373                 case 0:
 374                         if ( nretries != META_RETRY_NEVER
 375                                 || ( timeout && slap_get_time() <= stoptime ) )
 376                         {
 377                                 ldap_pvt_thread_yield();
 378                                 if ( nretries > 0 ) {
 379                                         nretries--;
 380                                 }
 381                                 tv = mt->mt_bind_timeout;
 382                                 goto retry;
 383                         }
 384
 385                         /* don't let anyone else use this handler,
 386                          * because there's a pending bind that will not
 387                          * be acknowledged */
 388                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 389                         assert( LDAP_BACK_CONN_BINDING( msc ) );
 390
 391 #ifdef DEBUG_205
 392                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_bind_op_result ldap_unbind_ext[%d] ld=%p\n",
 393                                 op->o_log_prefix, candidate, (void *)msc->msc_ld );
 394 #endif /* DEBUG_205 */
 395
 396                         meta_clear_one_candidate( op, mc, candidate );
 397                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 398
 399                         rs->sr_err = timeout_err;
 400                         rs->sr_text = timeout_text;
 401                         break;
 402
 403                 case -1:
 404                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
 405                                 &rs->sr_err );
 406
 407                         snprintf( buf, sizeof( buf ),
 408                                 "err=%d (%s) nretries=%d",
 409                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 410                         Debug( LDAP_DEBUG_ANY,
 411                                 "### %s meta_back_bind_op_result[%d]: %s.\n",
 412                                 op->o_log_prefix, candidate, buf );
 413                         break;
 414
 415                 default:
 416                         /* only touch when activity actually took place... */
 417                         if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 418                                 msc->msc_time = op->o_time;
 419                         }
 420
 421                         /* FIXME: matched? referrals? response controls? */
 422                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 423                                         NULL, NULL, NULL, NULL, 1 );
 424                         if ( rc != LDAP_SUCCESS ) {
 425                                 rs->sr_err = rc;
 426                         }
 427                         break;
 428                 }
 429         }
 430
 431         rs->sr_err = slap_map_api2result( rs );
 432
 433         Debug( LDAP_DEBUG_TRACE,
 434                 "<<< %s meta_back_bind_op_result[%d] err=%d\n",
 435                 op->o_log_prefix, candidate, rs->sr_err );
 436
 437         return rs->sr_err;
 438 }
 439
 440 /*
 441  * meta_back_single_bind
 442  *
 443  * attempts to perform a bind with creds
 444  */
 445 static int
 446 meta_back_single_bind(
 447         Operation               *op,
 448         SlapReply               *rs,
 449         metaconn_t              *mc,
 450         int                     candidate )
 451 {
 452         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 453         metatarget_t            *mt = mi->mi_targets[ candidate ];
 454         struct berval           mdn = BER_BVNULL;
 455         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 456         int                     msgid;
 457         dncookie                dc;
 458
 459         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 460                 ch_free( msc->msc_bound_ndn.bv_val );
 461                 BER_BVZERO( &msc->msc_bound_ndn );
 462         }
 463
 464         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 465                 /* destroy sensitive data */
 466                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 467                 ch_free( msc->msc_cred.bv_val );
 468                 BER_BVZERO( &msc->msc_cred );
 469         }
 470
 471         /*
 472          * Rewrite the bind dn if needed
 473          */
 474         dc.target = mt;
 475         dc.conn = op->o_conn;
 476         dc.rs = rs;
 477         dc.ctx = "bindDN";
 478
 479         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 480                 rs->sr_text = "DN rewrite error";
 481                 rs->sr_err = LDAP_OTHER;
 482                 return rs->sr_err;
 483         }
 484
 485         /* FIXME: this fixes the bind problem right now; we need
 486          * to use the asynchronous version to get the "matched"
 487          * and more in case of failure ... */
 488         /* FIXME: should we check if at least some of the op->o_ctrls
 489          * can/should be passed? */
 490         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 491                         LDAP_SASL_SIMPLE, &op->orb_cred,
 492                         op->o_ctrls, NULL, &msgid );
 493         meta_back_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND );
 494         if ( rs->sr_err != LDAP_SUCCESS ) {
 495                 goto return_results;
 496         }
 497
 498         /* If defined, proxyAuthz will be used also when
 499          * back-ldap is the authorizing backend; for this
 500          * purpose, a successful bind is followed by a
 501          * bind with the configured identity assertion */
 502         /* NOTE: use with care */
 503         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 504                 meta_back_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR );
 505                 if ( !LDAP_BACK_CONN_ISBOUND( msc ) ) {
 506                         goto return_results;
 507                 }
 508                 goto cache_refresh;
 509         }
 510
 511         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_ndn );
 512         LDAP_BACK_CONN_ISBOUND_SET( msc );
 513         mc->mc_authz_target = candidate;
 514
 515         if ( LDAP_BACK_SAVECRED( mi ) ) {
 516                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 517                         memset( msc->msc_cred.bv_val, 0,
 518                                 msc->msc_cred.bv_len );
 519                 }
 520                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 521                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 522         }
 523
 524 cache_refresh:;
 525         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 526                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 527         {
 528                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 529                                 &op->o_req_ndn, candidate );
 530         }
 531
 532 return_results:;
 533         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 534                 free( mdn.bv_val );
 535         }
 536
 537         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 538                 meta_back_quarantine( op, rs, candidate );
 539         }
 540
 541         return rs->sr_err;
 542 }
 543
 544 /*
 545  * meta_back_single_dobind
 546  */
 547 int
 548 meta_back_single_dobind(
 549         Operation               *op,
 550         SlapReply               *rs,
 551         metaconn_t              **mcp,
 552         int                     candidate,
 553         ldap_back_send_t        sendok,
 554         int                     nretries,
 555         int                     dolock )
 556 {
 557         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 558         metatarget_t            *mt = mi->mi_targets[ candidate ];
 559         metaconn_t              *mc = *mcp;
 560         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 561         static struct berval    cred = BER_BVC( "" );
 562         int                     msgid;
 563
 564         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 565
 566         /* NOTE: this obsoletes pseudorootdn */
 567         if ( op->o_conn != NULL &&
 568                 !op->o_do_not_cache &&
 569                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 570                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 571                         ( LDAP_BACK_CONN_ISPRIV( mc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
 572                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 573         {
 574                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
 575
 576         } else {
 577
 578                 /* FIXME: should we check if at least some of the op->o_ctrls
 579                  * can/should be passed? */
 580                 rs->sr_err = ldap_sasl_bind( msc->msc_ld,
 581                         "", LDAP_SASL_SIMPLE, &cred,
 582                         NULL, NULL, &msgid );
 583                 rs->sr_err = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
 584         }
 585
 586         if ( rs->sr_err != LDAP_SUCCESS ) {
 587                 if ( dolock ) {
 588                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 589                 }
 590                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 591                 if ( META_BACK_ONERR_STOP( mi ) ) {
 592                         LDAP_BACK_CONN_TAINTED_SET( mc );
 593                         meta_back_release_conn_lock( op, mc, 0 );
 594                         *mcp = NULL;
 595                 }
 596                 if ( dolock ) {
 597                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 598                 }
 599         }
 600
 601         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 602                 meta_back_quarantine( op, rs, candidate );
 603         }
 604
 605         return rs->sr_err;
 606 }
 607
 608 /*
 609  * meta_back_dobind
 610  */
 611 int
 612 meta_back_dobind(
 613         Operation               *op,
 614         SlapReply               *rs,
 615         metaconn_t              *mc,
 616         ldap_back_send_t        sendok )
 617 {
 618         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 619
 620         int                     bound = 0,
 621                                 i,
 622                                 isroot = 0;
 623
 624         SlapReply               *candidates = meta_back_candidates_get( op );
 625
 626         if ( be_isroot( op ) ) {
 627                 isroot = 1;
 628         }
 629
 630         Debug( LDAP_DEBUG_TRACE,
 631                 "%s meta_back_dobind: conn=%ld%s\n",
 632                 op->o_log_prefix,
 633                 LDAP_BACK_PCONN_ID( mc ),
 634                 isroot ? " (isroot)" : "" );
 635
 636         /*
 637          * all the targets are bound as pseudoroot
 638          */
 639         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 640                 bound = 1;
 641                 goto done;
 642         }
 643
 644         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 645                 metatarget_t            *mt = mi->mi_targets[ i ];
 646                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 647                 int                     rc;
 648
 649                 /*
 650                  * Not a candidate
 651                  */
 652                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 653                         continue;
 654                 }
 655
 656                 assert( msc->msc_ld != NULL );
 657
 658                 /*
 659                  * If the target is already bound it is skipped
 660                  */
 661
 662 retry_binding:;
 663                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 664                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 665                         || ( LDAP_BACK_CONN_ISANON( msc )
 666                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 667                 {
 668                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 669                         ++bound;
 670                         continue;
 671
 672                 } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
 673                 {
 674                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 675                         ldap_pvt_thread_yield();
 676                         goto retry_binding;
 677
 678                 }
 679
 680                 LDAP_BACK_CONN_BINDING_SET( msc );
 681                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 682
 683                 rc = meta_back_single_dobind( op, rs, &mc, i,
 684                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 685                 /*
 686                  * NOTE: meta_back_single_dobind() already retries;
 687                  * in case of failure, it resets mc...
 688                  */
 689                 if ( rc != LDAP_SUCCESS ) {
 690                         char            buf[ SLAP_TEXT_BUFLEN ];
 691
 692                         if ( mc == NULL ) {
 693                                 /* meta_back_single_dobind() already sent
 694                                  * response and released connection */
 695                                 goto send_err;
 696                         }
 697
 698
 699                         if ( rc == LDAP_UNAVAILABLE ) {
 700                                 /* FIXME: meta_back_retry() already re-calls
 701                                  * meta_back_single_dobind() */
 702                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 703                                         goto retry_ok;
 704                                 }
 705
 706                                 if ( mc != NULL ) {
 707                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 708                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 709                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 710                                         meta_back_release_conn( op, mc );
 711                                 }
 712
 713                                 return 0;
 714                         }
 715
 716                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 717                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 718                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 719
 720                         snprintf( buf, sizeof( buf ),
 721                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 722                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 723                                 rc, ldap_err2string( rc ) );
 724                         Debug( LDAP_DEBUG_ANY,
 725                                 "%s %s\n",
 726                                 op->o_log_prefix, buf, 0 );
 727
 728                         /*
 729                          * null cred bind should always succeed
 730                          * as anonymous, so a failure means
 731                          * the target is no longer candidate possibly
 732                          * due to technical reasons (remote host down?)
 733                          * so better clear the handle
 734                          */
 735                         /* leave the target candidate, but record the error for later use */
 736                         candidates[ i ].sr_err = rc;
 737                         if ( META_BACK_ONERR_STOP( mi ) ) {
 738                                 bound = 0;
 739                                 goto done;
 740                         }
 741
 742                         continue;
 743                 } /* else */
 744
 745 retry_ok:;
 746                 Debug( LDAP_DEBUG_TRACE,
 747                         "%s meta_back_dobind[%d]: "
 748                         "(%s)\n",
 749                         op->o_log_prefix, i,
 750                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 751
 752                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 753                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 754                 if ( isroot ) {
 755                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 756                 } else {
 757                         LDAP_BACK_CONN_ISANON_SET( msc );
 758                 }
 759                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 760                 ++bound;
 761         }
 762
 763 done:;
 764         Debug( LDAP_DEBUG_TRACE,
 765                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 766                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc ), bound );
 767
 768         if ( bound == 0 ) {
 769                 meta_back_release_conn( op, mc );
 770
 771 send_err:;
 772                 if ( sendok & LDAP_BACK_SENDERR ) {
 773                         if ( rs->sr_err == LDAP_SUCCESS ) {
 774                                 rs->sr_err = LDAP_BUSY;
 775                         }
 776                         send_ldap_result( op, rs );
 777                 }
 778
 779                 return 0;
 780         }
 781
 782         return ( bound > 0 );
 783 }
 784
 785 /*
 786  * meta_back_default_rebind
 787  *
 788  * This is a callback used for chasing referrals using the same
 789  * credentials as the original user on this session.
 790  */
 791 int
 792 meta_back_default_rebind(
 793         LDAP                    *ld,
 794         LDAP_CONST char         *url,
 795         ber_tag_t               request,
 796         ber_int_t               msgid,
 797         void                    *params )
 798 {
 799         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 800
 801         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 802                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 803                         NULL, NULL, NULL );
 804 }
 805
 806 int
 807 meta_back_cancel(
 808         metaconn_t              *mc,
 809         Operation               *op,
 810         SlapReply               *rs,
 811         ber_int_t               msgid,
 812         int                     candidate,
 813         ldap_back_send_t        sendok )
 814 {
 815         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 816
 817         metatarget_t            *mt = mi->mi_targets[ candidate ];
 818         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 819
 820         int                     rc = LDAP_OTHER;
 821
 822         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 823                 op->o_log_prefix, candidate, msgid );
 824
 825         /* default behavior */
 826         if ( META_BACK_TGT_ABANDON( mt ) ) {
 827                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 828
 829         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 830                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 831
 832         } else {
 833                 assert( 0 );
 834         }
 835
 836         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 837                 op->o_log_prefix, candidate, rc );
 838
 839         return rc;
 840 }
 841
 842
 843
 844 /*
 845  * FIXME: error return must be handled in a cleaner way ...
 846  */
 847 int
 848 meta_back_op_result(
 849         metaconn_t              *mc,
 850         Operation               *op,
 851         SlapReply               *rs,
 852         int                     candidate,
 853         ber_int_t               msgid,
 854         time_t                  timeout,
 855         ldap_back_send_t        sendok )
 856 {
 857         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 858
 859         const char      *save_text = rs->sr_text,
 860                         *save_matched = rs->sr_matched;
 861         BerVarray       save_ref = rs->sr_ref;
 862         LDAPControl     **save_ctrls = rs->sr_ctrls;
 863         void            *matched_ctx = NULL;
 864
 865         char            *matched = NULL;
 866         char            *text = NULL;
 867         char            **refs = NULL;
 868         LDAPControl     **ctrls = NULL;
 869
 870         assert( mc != NULL );
 871
 872         rs->sr_text = NULL;
 873         rs->sr_matched = NULL;
 874         rs->sr_ref = NULL;
 875         rs->sr_ctrls = NULL;
 876
 877         if ( candidate != META_TARGET_NONE ) {
 878                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 879                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 880
 881 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
 882
 883                 if ( ERR_OK( rs->sr_err ) ) {
 884                         int             rc;
 885                         struct timeval  tv;
 886                         LDAPMessage     *res = NULL;
 887                         time_t          stoptime = (time_t)(-1);
 888                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 889                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 890                         const char      *timeout_text = "Operation timed out";
 891
 892                         /* if timeout is not specified, compute and use
 893                          * the one specific to the ongoing operation */
 894                         if ( timeout == (time_t)(-1) ) {
 895                                 slap_op_t       opidx = slap_req2op( op->o_tag );
 896
 897                                 if ( opidx == SLAP_OP_SEARCH ) {
 898                                         if ( op->ors_tlimit <= 0 ) {
 899                                                 timeout = 0;
 900
 901                                         } else {
 902                                                 timeout = op->ors_tlimit;
 903                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 904                                                 timeout_text = NULL;
 905                                         }
 906
 907                                 } else {
 908                                         timeout = mt->mt_timeout[ opidx ];
 909                                 }
 910                         }
 911
 912                         /* better than nothing :) */
 913                         if ( timeout == 0 ) {
 914                                 if ( mi->mi_idle_timeout ) {
 915                                         timeout = mi->mi_idle_timeout;
 916
 917                                 } else if ( mi->mi_conn_ttl ) {
 918                                         timeout = mi->mi_conn_ttl;
 919                                 }
 920                         }
 921
 922                         if ( timeout ) {
 923                                 stoptime = op->o_time + timeout;
 924                         }
 925
 926                         LDAP_BACK_TV_SET( &tv );
 927
 928 retry:;
 929                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 930                         switch ( rc ) {
 931                         case 0:
 932                                 if ( timeout && slap_get_time() > stoptime ) {
 933                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
 934                                         rs->sr_err = timeout_err;
 935                                         rs->sr_text = timeout_text;
 936                                         break;
 937                                 }
 938
 939                                 LDAP_BACK_TV_SET( &tv );
 940                                 ldap_pvt_thread_yield();
 941                                 goto retry;
 942
 943                         case -1:
 944                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
 945                                                 &rs->sr_err );
 946                                 break;
 947
 948
 949                         /* otherwise get the result; if it is not
 950                          * LDAP_SUCCESS, record it in the reply
 951                          * structure (this includes
 952                          * LDAP_COMPARE_{TRUE|FALSE}) */
 953                         default:
 954                                 /* only touch when activity actually took place... */
 955                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 956                                         msc->msc_time = op->o_time;
 957                                 }
 958
 959                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 960                                                 &matched, &text, &refs, &ctrls, 1 );
 961                                 res = NULL;
 962                                 rs->sr_text = text;
 963                                 if ( rc != LDAP_SUCCESS ) {
 964                                         rs->sr_err = rc;
 965                                 }
 966                                 if ( refs != NULL ) {
 967                                         int     i;
 968
 969                                         for ( i = 0; refs[ i ] != NULL; i++ )
 970                                                 /* count */ ;
 971                                         rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
 972                                                 op->o_tmpmemctx );
 973                                         for ( i = 0; refs[ i ] != NULL; i++ ) {
 974                                                 ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
 975                                         }
 976                                         BER_BVZERO( &rs->sr_ref[ i ] );
 977                                 }
 978                                 if ( ctrls != NULL ) {
 979                                         rs->sr_ctrls = ctrls;
 980                                 }
 981                         }
 982
 983                         assert( res == NULL );
 984                 }
 985
 986                 /* if the error in the reply structure is not
 987                  * LDAP_SUCCESS, try to map it from client
 988                  * to server error */
 989                 if ( !ERR_OK( rs->sr_err ) ) {
 990                         rs->sr_err = slap_map_api2result( rs );
 991
 992                         /* internal ops ( op->o_conn == NULL )
 993                          * must not reply to client */
 994                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
 995
 996                                 /* record the (massaged) matched
 997                                  * DN into the reply structure */
 998                                 rs->sr_matched = matched;
 999                         }
1000                 }
1001
1002                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1003                         meta_back_quarantine( op, rs, candidate );
1004                 }
1005
1006         } else {
1007                 int     i,
1008                         err = rs->sr_err;
1009
1010                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1011                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1012                         char                    *xtext = NULL;
1013                         char                    *xmatched = NULL;
1014
1015                         rs->sr_err = LDAP_SUCCESS;
1016
1017                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
1018                         if ( rs->sr_err != LDAP_SUCCESS ) {
1019                                 /*
1020                                  * better check the type of error. In some cases
1021                                  * (search ?) it might be better to return a
1022                                  * success if at least one of the targets gave
1023                                  * positive result ...
1024                                  */
1025                                 ldap_get_option( msc->msc_ld,
1026                                                 LDAP_OPT_ERROR_STRING, &xtext );
1027                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1028                                         ldap_memfree( xtext );
1029                                         xtext = NULL;
1030                                 }
1031
1032                                 ldap_get_option( msc->msc_ld,
1033                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1034                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1035                                         ldap_memfree( xmatched );
1036                                         xmatched = NULL;
1037                                 }
1038
1039                                 rs->sr_err = slap_map_api2result( rs );
1040
1041                                 if ( StatslogTest( LDAP_DEBUG_ANY ) ) {
1042                                         char    buf[ SLAP_TEXT_BUFLEN ];
1043
1044                                         snprintf( buf, sizeof( buf ),
1045                                                 "meta_back_op_result[%d] "
1046                                                 "err=%d text=\"%s\" matched=\"%s\"",
1047                                                 i, rs->sr_err,
1048                                                 ( xtext ? xtext : "" ),
1049                                                 ( xmatched ? xmatched : "" ) );
1050                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1051                                                 op->o_log_prefix, buf, 0 );
1052                                 }
1053
1054                                 /*
1055                                  * FIXME: need to rewrite "match" (need rwinfo)
1056                                  */
1057                                 switch ( rs->sr_err ) {
1058                                 default:
1059                                         err = rs->sr_err;
1060                                         if ( xtext != NULL ) {
1061                                                 if ( text ) {
1062                                                         ldap_memfree( text );
1063                                                 }
1064                                                 text = xtext;
1065                                                 xtext = NULL;
1066                                         }
1067                                         if ( xmatched != NULL ) {
1068                                                 if ( matched ) {
1069                                                         ldap_memfree( matched );
1070                                                 }
1071                                                 matched = xmatched;
1072                                                 xmatched = NULL;
1073                                         }
1074                                         break;
1075                                 }
1076
1077                                 if ( xtext ) {
1078                                         ldap_memfree( xtext );
1079                                 }
1080
1081                                 if ( xmatched ) {
1082                                         ldap_memfree( xmatched );
1083                                 }
1084                         }
1085
1086                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1087                                 meta_back_quarantine( op, rs, i );
1088                         }
1089                 }
1090
1091                 if ( err != LDAP_SUCCESS ) {
1092                         rs->sr_err = err;
1093                 }
1094         }
1095
1096         if ( matched != NULL ) {
1097                 struct berval   dn, pdn;
1098
1099                 ber_str2bv( matched, 0, 0, &dn );
1100                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1101                         ldap_memfree( matched );
1102                         matched_ctx = op->o_tmpmemctx;
1103                         matched = pdn.bv_val;
1104                 }
1105                 rs->sr_matched = matched;
1106         }
1107
1108         if ( op->o_conn &&
1109                 ( ( sendok & LDAP_BACK_SENDOK )
1110                         || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1111         {
1112                 send_ldap_result( op, rs );
1113         }
1114         if ( matched ) {
1115                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1116         }
1117         if ( text ) {
1118                 ldap_memfree( text );
1119         }
1120         if ( rs->sr_ref ) {
1121                 assert( refs != NULL );
1122                 ber_memvfree( (void **)refs );
1123                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1124         }
1125         if ( ctrls ) {
1126                 assert( rs->sr_ctrls != NULL );
1127                 ldap_controls_free( ctrls );
1128         }
1129
1130         rs->sr_text = save_text;
1131         rs->sr_matched = save_matched;
1132         rs->sr_ref = save_ref;
1133         rs->sr_ctrls = save_ctrls;
1134
1135         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1136 }
1137
1138 /*
1139  * meta_back_proxy_authz_cred()
1140  *
1141  * prepares credentials & method for meta_back_proxy_authz_bind();
1142  * or, if method is SASL, performs the SASL bind directly.
1143  */
1144 int
1145 meta_back_proxy_authz_cred(
1146         metaconn_t              *mc,
1147         int                     candidate,
1148         Operation               *op,
1149         SlapReply               *rs,
1150         ldap_back_send_t        sendok,
1151         struct berval           *binddn,
1152         struct berval           *bindcred,
1153         int                     *method )
1154 {
1155         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1156         metatarget_t            *mt = mi->mi_targets[ candidate ];
1157         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1158         struct berval           ndn;
1159         int                     dobind = 0;
1160
1161         /* don't proxyAuthz if protocol is not LDAPv3 */
1162         switch ( mt->mt_version ) {
1163         case LDAP_VERSION3:
1164                 break;
1165
1166         case 0:
1167                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1168                         break;
1169                 }
1170                 /* fall thru */
1171
1172         default:
1173                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1174                 if ( sendok & LDAP_BACK_SENDERR ) {
1175                         send_ldap_result( op, rs );
1176                 }
1177                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1178                 goto done;
1179         }
1180
1181         if ( op->o_tag == LDAP_REQ_BIND ) {
1182                 ndn = op->o_req_ndn;
1183
1184         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1185                 ndn = op->o_conn->c_ndn;
1186
1187         } else {
1188                 ndn = op->o_ndn;
1189         }
1190
1191         /*
1192          * FIXME: we need to let clients use proxyAuthz
1193          * otherwise we cannot do symmetric pools of servers;
1194          * we have to live with the fact that a user can
1195          * authorize itself as any ID that is allowed
1196          * by the authzTo directive of the "proxyauthzdn".
1197          */
1198         /*
1199          * NOTE: current Proxy Authorization specification
1200          * and implementation do not allow proxy authorization
1201          * control to be provided with Bind requests
1202          */
1203         /*
1204          * if no bind took place yet, but the connection is bound
1205          * and the "proxyauthzdn" is set, then bind as
1206          * "proxyauthzdn" and explicitly add the proxyAuthz
1207          * control to every operation with the dn bound
1208          * to the connection as control value.
1209          */
1210
1211         /* bind as proxyauthzdn only if no idassert mode
1212          * is requested, or if the client's identity
1213          * is authorized */
1214         switch ( mt->mt_idassert_mode ) {
1215         case LDAP_BACK_IDASSERT_LEGACY:
1216                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1217                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1218                         {
1219                                 *binddn = mt->mt_idassert_authcDN;
1220                                 *bindcred = mt->mt_idassert_passwd;
1221                                 dobind = 1;
1222                         }
1223                 }
1224                 break;
1225
1226         default:
1227                 /* NOTE: rootdn can always idassert */
1228                 if ( BER_BVISNULL( &ndn ) && mt->mt_idassert_authz == NULL ) {
1229                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1230                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1231                                 if ( sendok & LDAP_BACK_SENDERR ) {
1232                                         send_ldap_result( op, rs );
1233                                 }
1234                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1235
1236                         } else {
1237                                 rs->sr_err = LDAP_SUCCESS;
1238                                 *binddn = slap_empty_bv;
1239                                 *bindcred = slap_empty_bv;
1240                                 break;
1241                         }
1242
1243                         goto done;
1244
1245                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1246                         struct berval authcDN;
1247
1248                         if ( BER_BVISNULL( &ndn ) ) {
1249                                 authcDN = slap_empty_bv;
1250
1251                         } else {
1252                                 authcDN = ndn;
1253                         }
1254                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1255                                         &authcDN, &authcDN );
1256                         if ( rs->sr_err != LDAP_SUCCESS ) {
1257                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1258                                         if ( sendok & LDAP_BACK_SENDERR ) {
1259                                                 send_ldap_result( op, rs );
1260                                         }
1261                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1262
1263                                 } else {
1264                                         rs->sr_err = LDAP_SUCCESS;
1265                                         *binddn = slap_empty_bv;
1266                                         *bindcred = slap_empty_bv;
1267                                         break;
1268                                 }
1269
1270                                 goto done;
1271                         }
1272                 }
1273
1274                 *binddn = mt->mt_idassert_authcDN;
1275                 *bindcred = mt->mt_idassert_passwd;
1276                 dobind = 1;
1277                 break;
1278         }
1279
1280         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1281 #ifdef HAVE_CYRUS_SASL
1282                 void            *defaults = NULL;
1283                 struct berval   authzID = BER_BVNULL;
1284                 int             freeauthz = 0;
1285
1286                 /* if SASL supports native authz, prepare for it */
1287                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1288                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1289                 {
1290                         switch ( mt->mt_idassert_mode ) {
1291                         case LDAP_BACK_IDASSERT_OTHERID:
1292                         case LDAP_BACK_IDASSERT_OTHERDN:
1293                                 authzID = mt->mt_idassert_authzID;
1294                                 break;
1295
1296                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1297                                 BER_BVSTR( &authzID, "dn:" );
1298                                 break;
1299
1300                         case LDAP_BACK_IDASSERT_SELF:
1301                                 if ( BER_BVISNULL( &ndn ) ) {
1302                                         /* connection is not authc'd, so don't idassert */
1303                                         BER_BVSTR( &authzID, "dn:" );
1304                                         break;
1305                                 }
1306                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1307                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1308                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1309                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1310                                                 ndn.bv_val, ndn.bv_len + 1 );
1311                                 freeauthz = 1;
1312                                 break;
1313
1314                         default:
1315                                 break;
1316                         }
1317                 }
1318
1319                 if ( mt->mt_idassert_secprops != NULL ) {
1320                         rs->sr_err = ldap_set_option( msc->msc_ld,
1321                                 LDAP_OPT_X_SASL_SECPROPS,
1322                                 (void *)mt->mt_idassert_secprops );
1323
1324                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1325                                 rs->sr_err = LDAP_OTHER;
1326                                 if ( sendok & LDAP_BACK_SENDERR ) {
1327                                         send_ldap_result( op, rs );
1328                                 }
1329                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1330                                 goto done;
1331                         }
1332                 }
1333
1334                 defaults = lutil_sasl_defaults( msc->msc_ld,
1335                                 mt->mt_idassert_sasl_mech.bv_val,
1336                                 mt->mt_idassert_sasl_realm.bv_val,
1337                                 mt->mt_idassert_authcID.bv_val,
1338                                 mt->mt_idassert_passwd.bv_val,
1339                                 authzID.bv_val );
1340
1341                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1342                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1343                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1344                                 defaults );
1345
1346                 rs->sr_err = slap_map_api2result( rs );
1347                 if ( rs->sr_err != LDAP_SUCCESS ) {
1348                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1349                         if ( sendok & LDAP_BACK_SENDERR ) {
1350                                 send_ldap_result( op, rs );
1351                         }
1352
1353                 } else {
1354                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1355                 }
1356
1357                 lutil_sasl_freedefs( defaults );
1358                 if ( freeauthz ) {
1359                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1360                 }
1361
1362                 goto done;
1363 #endif /* HAVE_CYRUS_SASL */
1364         }
1365
1366         *method = mt->mt_idassert_authmethod;
1367         switch ( mt->mt_idassert_authmethod ) {
1368         case LDAP_AUTH_NONE:
1369                 BER_BVSTR( binddn, "" );
1370                 BER_BVSTR( bindcred, "" );
1371                 /* fallthru */
1372
1373         case LDAP_AUTH_SIMPLE:
1374                 break;
1375
1376         default:
1377                 /* unsupported! */
1378                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1379                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1380                 if ( sendok & LDAP_BACK_SENDERR ) {
1381                         send_ldap_result( op, rs );
1382                 }
1383                 break;
1384         }
1385
1386 done:;
1387         return rs->sr_err;
1388 }
1389
1390 static int
1391 meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1392 {
1393         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1394         metatarget_t            *mt = mi->mi_targets[ candidate ];
1395         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1396         struct berval           binddn = BER_BVC( "" ),
1397                                 cred = BER_BVC( "" );
1398         int                     method = LDAP_AUTH_NONE,
1399                                 rc;
1400
1401         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1402         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1403                 int     msgid;
1404
1405                 switch ( method ) {
1406                 case LDAP_AUTH_NONE:
1407                 case LDAP_AUTH_SIMPLE:
1408                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1409                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1410                                         &cred, NULL, NULL, &msgid );
1411                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
1412                         if ( rc == LDAP_SUCCESS ) {
1413                                 /* set rebind stuff in case of successful proxyAuthz bind,
1414                                  * so that referral chasing is attempted using the right
1415                                  * identity */
1416                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1417                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1418
1419                                 if ( LDAP_BACK_SAVECRED( mi ) ) {
1420                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1421                                                 memset( msc->msc_cred.bv_val, 0,
1422                                                         msc->msc_cred.bv_len );
1423                                         }
1424                                         ber_bvreplace( &msc->msc_cred, &cred );
1425                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1426                                 }
1427                         }
1428                         break;
1429
1430                 default:
1431                         assert( 0 );
1432                         break;
1433                 }
1434         }
1435
1436         return LDAP_BACK_CONN_ISBOUND( msc );
1437 }