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 ( LogTest( 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_ERROR_NUMBER,
 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         for (;;) {
 491                 rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 492                         LDAP_SASL_SIMPLE, &op->orb_cred,
 493                         op->o_ctrls, NULL, &msgid );
 494                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
 495                         break;
 496                 }
 497                 ldap_pvt_thread_yield();
 498         }
 499         meta_back_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND );
 500         if ( rs->sr_err != LDAP_SUCCESS ) {
 501                 goto return_results;
 502         }
 503
 504         /* If defined, proxyAuthz will be used also when
 505          * back-ldap is the authorizing backend; for this
 506          * purpose, a successful bind is followed by a
 507          * bind with the configured identity assertion */
 508         /* NOTE: use with care */
 509         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 510                 meta_back_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR );
 511                 if ( !LDAP_BACK_CONN_ISBOUND( msc ) ) {
 512                         goto return_results;
 513                 }
 514                 goto cache_refresh;
 515         }
 516
 517         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_ndn );
 518         LDAP_BACK_CONN_ISBOUND_SET( msc );
 519         mc->mc_authz_target = candidate;
 520
 521         if ( LDAP_BACK_SAVECRED( mi ) ) {
 522                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 523                         memset( msc->msc_cred.bv_val, 0,
 524                                 msc->msc_cred.bv_len );
 525                 }
 526                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 527                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 528         }
 529
 530 cache_refresh:;
 531         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 532                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 533         {
 534                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 535                                 &op->o_req_ndn, candidate );
 536         }
 537
 538 return_results:;
 539         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 540                 free( mdn.bv_val );
 541         }
 542
 543         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 544                 meta_back_quarantine( op, rs, candidate );
 545         }
 546
 547         return rs->sr_err;
 548 }
 549
 550 /*
 551  * meta_back_single_dobind
 552  */
 553 int
 554 meta_back_single_dobind(
 555         Operation               *op,
 556         SlapReply               *rs,
 557         metaconn_t              **mcp,
 558         int                     candidate,
 559         ldap_back_send_t        sendok,
 560         int                     nretries,
 561         int                     dolock )
 562 {
 563         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 564         metatarget_t            *mt = mi->mi_targets[ candidate ];
 565         metaconn_t              *mc = *mcp;
 566         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 567         static struct berval    cred = BER_BVC( "" );
 568         int                     msgid;
 569
 570         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 571
 572         /* NOTE: this obsoletes pseudorootdn */
 573         if ( op->o_conn != NULL &&
 574                 !op->o_do_not_cache &&
 575                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 576                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 577                         ( LDAP_BACK_CONN_ISPRIV( mc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
 578                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 579         {
 580                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
 581
 582         } else {
 583
 584                 /* FIXME: should we check if at least some of the op->o_ctrls
 585                  * can/should be passed? */
 586                 for (;;) {
 587                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
 588                                 "", LDAP_SASL_SIMPLE, &cred,
 589                                 NULL, NULL, &msgid );
 590                         if ( rs->sr_err != LDAP_X_CONNECTING ) {
 591                                 break;
 592                         }
 593                         ldap_pvt_thread_yield();
 594                 }
 595
 596                 rs->sr_err = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
 597         }
 598
 599         if ( rs->sr_err != LDAP_SUCCESS ) {
 600                 if ( dolock ) {
 601                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 602                 }
 603                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 604                 if ( META_BACK_ONERR_STOP( mi ) ) {
 605                         LDAP_BACK_CONN_TAINTED_SET( mc );
 606                         meta_back_release_conn_lock( op, mc, 0 );
 607                         *mcp = NULL;
 608                 }
 609                 if ( dolock ) {
 610                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 611                 }
 612         }
 613
 614         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 615                 meta_back_quarantine( op, rs, candidate );
 616         }
 617
 618         return rs->sr_err;
 619 }
 620
 621 /*
 622  * meta_back_dobind
 623  */
 624 int
 625 meta_back_dobind(
 626         Operation               *op,
 627         SlapReply               *rs,
 628         metaconn_t              *mc,
 629         ldap_back_send_t        sendok )
 630 {
 631         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 632
 633         int                     bound = 0,
 634                                 i,
 635                                 isroot = 0;
 636
 637         SlapReply               *candidates = meta_back_candidates_get( op );
 638
 639         if ( be_isroot( op ) ) {
 640                 isroot = 1;
 641         }
 642
 643         Debug( LDAP_DEBUG_TRACE,
 644                 "%s meta_back_dobind: conn=%ld%s\n",
 645                 op->o_log_prefix,
 646                 LDAP_BACK_PCONN_ID( mc ),
 647                 isroot ? " (isroot)" : "" );
 648
 649         /*
 650          * all the targets are bound as pseudoroot
 651          */
 652         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 653                 bound = 1;
 654                 goto done;
 655         }
 656
 657         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 658                 metatarget_t            *mt = mi->mi_targets[ i ];
 659                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 660                 int                     rc;
 661
 662                 /*
 663                  * Not a candidate
 664                  */
 665                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 666                         continue;
 667                 }
 668
 669                 assert( msc->msc_ld != NULL );
 670
 671                 /*
 672                  * If the target is already bound it is skipped
 673                  */
 674
 675 retry_binding:;
 676                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 677                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 678                         || ( LDAP_BACK_CONN_ISANON( msc )
 679                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 680                 {
 681                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 682                         ++bound;
 683                         continue;
 684
 685                 } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
 686                 {
 687                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 688                         ldap_pvt_thread_yield();
 689                         goto retry_binding;
 690
 691                 }
 692
 693                 LDAP_BACK_CONN_BINDING_SET( msc );
 694                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 695
 696                 rc = meta_back_single_dobind( op, rs, &mc, i,
 697                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 698                 /*
 699                  * NOTE: meta_back_single_dobind() already retries;
 700                  * in case of failure, it resets mc...
 701                  */
 702                 if ( rc != LDAP_SUCCESS ) {
 703                         char            buf[ SLAP_TEXT_BUFLEN ];
 704
 705                         if ( mc == NULL ) {
 706                                 /* meta_back_single_dobind() already sent
 707                                  * response and released connection */
 708                                 goto send_err;
 709                         }
 710
 711
 712                         if ( rc == LDAP_UNAVAILABLE ) {
 713                                 /* FIXME: meta_back_retry() already re-calls
 714                                  * meta_back_single_dobind() */
 715                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 716                                         goto retry_ok;
 717                                 }
 718
 719                                 if ( mc != NULL ) {
 720                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 721                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 722                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 723                                         meta_back_release_conn( op, mc );
 724                                 }
 725
 726                                 return 0;
 727                         }
 728
 729                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 730                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 731                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 732
 733                         snprintf( buf, sizeof( buf ),
 734                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 735                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 736                                 rc, ldap_err2string( rc ) );
 737                         Debug( LDAP_DEBUG_ANY,
 738                                 "%s %s\n",
 739                                 op->o_log_prefix, buf, 0 );
 740
 741                         /*
 742                          * null cred bind should always succeed
 743                          * as anonymous, so a failure means
 744                          * the target is no longer candidate possibly
 745                          * due to technical reasons (remote host down?)
 746                          * so better clear the handle
 747                          */
 748                         /* leave the target candidate, but record the error for later use */
 749                         candidates[ i ].sr_err = rc;
 750                         if ( META_BACK_ONERR_STOP( mi ) ) {
 751                                 bound = 0;
 752                                 goto done;
 753                         }
 754
 755                         continue;
 756                 } /* else */
 757
 758 retry_ok:;
 759                 Debug( LDAP_DEBUG_TRACE,
 760                         "%s meta_back_dobind[%d]: "
 761                         "(%s)\n",
 762                         op->o_log_prefix, i,
 763                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 764
 765                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 766                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 767                 if ( isroot ) {
 768                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 769                 } else {
 770                         LDAP_BACK_CONN_ISANON_SET( msc );
 771                 }
 772                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 773                 ++bound;
 774         }
 775
 776 done:;
 777         Debug( LDAP_DEBUG_TRACE,
 778                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 779                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc ), bound );
 780
 781         if ( bound == 0 ) {
 782                 meta_back_release_conn( op, mc );
 783
 784 send_err:;
 785                 if ( sendok & LDAP_BACK_SENDERR ) {
 786                         if ( rs->sr_err == LDAP_SUCCESS ) {
 787                                 rs->sr_err = LDAP_BUSY;
 788                         }
 789                         send_ldap_result( op, rs );
 790                 }
 791
 792                 return 0;
 793         }
 794
 795         return ( bound > 0 );
 796 }
 797
 798 /*
 799  * meta_back_default_rebind
 800  *
 801  * This is a callback used for chasing referrals using the same
 802  * credentials as the original user on this session.
 803  */
 804 int
 805 meta_back_default_rebind(
 806         LDAP                    *ld,
 807         LDAP_CONST char         *url,
 808         ber_tag_t               request,
 809         ber_int_t               msgid,
 810         void                    *params )
 811 {
 812         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 813
 814         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 815                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 816                         NULL, NULL, NULL );
 817 }
 818
 819 /*
 820  * meta_back_default_urllist
 821  *
 822  * This is a callback used for mucking with the urllist
 823  */
 824 int
 825 meta_back_default_urllist(
 826         LDAP            *ld,
 827         LDAPURLDesc     **urllist,
 828         LDAPURLDesc     **url,
 829         void            *params )
 830 {
 831         metatarget_t    *mt = (metatarget_t *)params;
 832         LDAPURLDesc     **urltail;
 833
 834         if ( urllist == url ) {
 835                 return LDAP_SUCCESS;
 836         }
 837
 838         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 839                 /* count */ ;
 840
 841         *urltail = *urllist;
 842         *urllist = *url;
 843         *url = NULL;
 844
 845         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 846         if ( mt->mt_uri ) {
 847                 ch_free( mt->mt_uri );
 848         }
 849
 850         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 851         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 852
 853         return LDAP_SUCCESS;
 854 }
 855
 856 int
 857 meta_back_cancel(
 858         metaconn_t              *mc,
 859         Operation               *op,
 860         SlapReply               *rs,
 861         ber_int_t               msgid,
 862         int                     candidate,
 863         ldap_back_send_t        sendok )
 864 {
 865         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 866
 867         metatarget_t            *mt = mi->mi_targets[ candidate ];
 868         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 869
 870         int                     rc = LDAP_OTHER;
 871
 872         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 873                 op->o_log_prefix, candidate, msgid );
 874
 875         /* default behavior */
 876         if ( META_BACK_TGT_ABANDON( mt ) ) {
 877                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 878
 879         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 880                 rc = ldap_pvt_discard( msc->msc_ld, msgid );
 881
 882         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 883                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 884
 885         } else {
 886                 assert( 0 );
 887         }
 888
 889         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 890                 op->o_log_prefix, candidate, rc );
 891
 892         return rc;
 893 }
 894
 895
 896
 897 /*
 898  * FIXME: error return must be handled in a cleaner way ...
 899  */
 900 int
 901 meta_back_op_result(
 902         metaconn_t              *mc,
 903         Operation               *op,
 904         SlapReply               *rs,
 905         int                     candidate,
 906         ber_int_t               msgid,
 907         time_t                  timeout,
 908         ldap_back_send_t        sendok )
 909 {
 910         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 911
 912         const char      *save_text = rs->sr_text,
 913                         *save_matched = rs->sr_matched;
 914         BerVarray       save_ref = rs->sr_ref;
 915         LDAPControl     **save_ctrls = rs->sr_ctrls;
 916         void            *matched_ctx = NULL;
 917
 918         char            *matched = NULL;
 919         char            *text = NULL;
 920         char            **refs = NULL;
 921         LDAPControl     **ctrls = NULL;
 922
 923         assert( mc != NULL );
 924
 925         rs->sr_text = NULL;
 926         rs->sr_matched = NULL;
 927         rs->sr_ref = NULL;
 928         rs->sr_ctrls = NULL;
 929
 930         if ( candidate != META_TARGET_NONE ) {
 931                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 932                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 933
 934 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
 935
 936                 if ( ERR_OK( rs->sr_err ) ) {
 937                         int             rc;
 938                         struct timeval  tv;
 939                         LDAPMessage     *res = NULL;
 940                         time_t          stoptime = (time_t)(-1);
 941                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 942                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 943                         const char      *timeout_text = "Operation timed out";
 944
 945                         /* if timeout is not specified, compute and use
 946                          * the one specific to the ongoing operation */
 947                         if ( timeout == (time_t)(-1) ) {
 948                                 slap_op_t       opidx = slap_req2op( op->o_tag );
 949
 950                                 if ( opidx == SLAP_OP_SEARCH ) {
 951                                         if ( op->ors_tlimit <= 0 ) {
 952                                                 timeout = 0;
 953
 954                                         } else {
 955                                                 timeout = op->ors_tlimit;
 956                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 957                                                 timeout_text = NULL;
 958                                         }
 959
 960                                 } else {
 961                                         timeout = mt->mt_timeout[ opidx ];
 962                                 }
 963                         }
 964
 965                         /* better than nothing :) */
 966                         if ( timeout == 0 ) {
 967                                 if ( mi->mi_idle_timeout ) {
 968                                         timeout = mi->mi_idle_timeout;
 969
 970                                 } else if ( mi->mi_conn_ttl ) {
 971                                         timeout = mi->mi_conn_ttl;
 972                                 }
 973                         }
 974
 975                         if ( timeout ) {
 976                                 stoptime = op->o_time + timeout;
 977                         }
 978
 979                         LDAP_BACK_TV_SET( &tv );
 980
 981 retry:;
 982                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 983                         switch ( rc ) {
 984                         case 0:
 985                                 if ( timeout && slap_get_time() > stoptime ) {
 986                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
 987                                         rs->sr_err = timeout_err;
 988                                         rs->sr_text = timeout_text;
 989                                         break;
 990                                 }
 991
 992                                 LDAP_BACK_TV_SET( &tv );
 993                                 ldap_pvt_thread_yield();
 994                                 goto retry;
 995
 996                         case -1:
 997                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
 998                                                 &rs->sr_err );
 999                                 break;
1000
1001
1002                         /* otherwise get the result; if it is not
1003                          * LDAP_SUCCESS, record it in the reply
1004                          * structure (this includes
1005                          * LDAP_COMPARE_{TRUE|FALSE}) */
1006                         default:
1007                                 /* only touch when activity actually took place... */
1008                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
1009                                         msc->msc_time = op->o_time;
1010                                 }
1011
1012                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
1013                                                 &matched, &text, &refs, &ctrls, 1 );
1014                                 res = NULL;
1015                                 rs->sr_text = text;
1016                                 if ( rc != LDAP_SUCCESS ) {
1017                                         rs->sr_err = rc;
1018                                 }
1019                                 if ( refs != NULL ) {
1020                                         int     i;
1021
1022                                         for ( i = 0; refs[ i ] != NULL; i++ )
1023                                                 /* count */ ;
1024                                         rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1025                                                 op->o_tmpmemctx );
1026                                         for ( i = 0; refs[ i ] != NULL; i++ ) {
1027                                                 ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1028                                         }
1029                                         BER_BVZERO( &rs->sr_ref[ i ] );
1030                                 }
1031                                 if ( ctrls != NULL ) {
1032                                         rs->sr_ctrls = ctrls;
1033                                 }
1034                         }
1035
1036                         assert( res == NULL );
1037                 }
1038
1039                 /* if the error in the reply structure is not
1040                  * LDAP_SUCCESS, try to map it from client
1041                  * to server error */
1042                 if ( !ERR_OK( rs->sr_err ) ) {
1043                         rs->sr_err = slap_map_api2result( rs );
1044
1045                         /* internal ops ( op->o_conn == NULL )
1046                          * must not reply to client */
1047                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1048
1049                                 /* record the (massaged) matched
1050                                  * DN into the reply structure */
1051                                 rs->sr_matched = matched;
1052                         }
1053                 }
1054
1055                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1056                         meta_back_quarantine( op, rs, candidate );
1057                 }
1058
1059         } else {
1060                 int     i,
1061                         err = rs->sr_err;
1062
1063                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1064                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1065                         char                    *xtext = NULL;
1066                         char                    *xmatched = NULL;
1067
1068                         rs->sr_err = LDAP_SUCCESS;
1069
1070                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rs->sr_err );
1071                         if ( rs->sr_err != LDAP_SUCCESS ) {
1072                                 /*
1073                                  * better check the type of error. In some cases
1074                                  * (search ?) it might be better to return a
1075                                  * success if at least one of the targets gave
1076                                  * positive result ...
1077                                  */
1078                                 ldap_get_option( msc->msc_ld,
1079                                                 LDAP_OPT_DIAGNOSTIC_MESSAGE, &xtext );
1080                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1081                                         ldap_memfree( xtext );
1082                                         xtext = NULL;
1083                                 }
1084
1085                                 ldap_get_option( msc->msc_ld,
1086                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1087                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1088                                         ldap_memfree( xmatched );
1089                                         xmatched = NULL;
1090                                 }
1091
1092                                 rs->sr_err = slap_map_api2result( rs );
1093
1094                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1095                                         char    buf[ SLAP_TEXT_BUFLEN ];
1096
1097                                         snprintf( buf, sizeof( buf ),
1098                                                 "meta_back_op_result[%d] "
1099                                                 "err=%d text=\"%s\" matched=\"%s\"",
1100                                                 i, rs->sr_err,
1101                                                 ( xtext ? xtext : "" ),
1102                                                 ( xmatched ? xmatched : "" ) );
1103                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1104                                                 op->o_log_prefix, buf, 0 );
1105                                 }
1106
1107                                 /*
1108                                  * FIXME: need to rewrite "match" (need rwinfo)
1109                                  */
1110                                 switch ( rs->sr_err ) {
1111                                 default:
1112                                         err = rs->sr_err;
1113                                         if ( xtext != NULL ) {
1114                                                 if ( text ) {
1115                                                         ldap_memfree( text );
1116                                                 }
1117                                                 text = xtext;
1118                                                 xtext = NULL;
1119                                         }
1120                                         if ( xmatched != NULL ) {
1121                                                 if ( matched ) {
1122                                                         ldap_memfree( matched );
1123                                                 }
1124                                                 matched = xmatched;
1125                                                 xmatched = NULL;
1126                                         }
1127                                         break;
1128                                 }
1129
1130                                 if ( xtext ) {
1131                                         ldap_memfree( xtext );
1132                                 }
1133
1134                                 if ( xmatched ) {
1135                                         ldap_memfree( xmatched );
1136                                 }
1137                         }
1138
1139                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1140                                 meta_back_quarantine( op, rs, i );
1141                         }
1142                 }
1143
1144                 if ( err != LDAP_SUCCESS ) {
1145                         rs->sr_err = err;
1146                 }
1147         }
1148
1149         if ( matched != NULL ) {
1150                 struct berval   dn, pdn;
1151
1152                 ber_str2bv( matched, 0, 0, &dn );
1153                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1154                         ldap_memfree( matched );
1155                         matched_ctx = op->o_tmpmemctx;
1156                         matched = pdn.bv_val;
1157                 }
1158                 rs->sr_matched = matched;
1159         }
1160
1161         if ( op->o_conn &&
1162                 ( ( sendok & LDAP_BACK_SENDOK )
1163                         || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1164         {
1165                 send_ldap_result( op, rs );
1166         }
1167         if ( matched ) {
1168                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1169         }
1170         if ( text ) {
1171                 ldap_memfree( text );
1172         }
1173         if ( rs->sr_ref ) {
1174                 assert( refs != NULL );
1175                 ber_memvfree( (void **)refs );
1176                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1177         }
1178         if ( ctrls ) {
1179                 assert( rs->sr_ctrls != NULL );
1180                 ldap_controls_free( ctrls );
1181         }
1182
1183         rs->sr_text = save_text;
1184         rs->sr_matched = save_matched;
1185         rs->sr_ref = save_ref;
1186         rs->sr_ctrls = save_ctrls;
1187
1188         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1189 }
1190
1191 /*
1192  * meta_back_proxy_authz_cred()
1193  *
1194  * prepares credentials & method for meta_back_proxy_authz_bind();
1195  * or, if method is SASL, performs the SASL bind directly.
1196  */
1197 int
1198 meta_back_proxy_authz_cred(
1199         metaconn_t              *mc,
1200         int                     candidate,
1201         Operation               *op,
1202         SlapReply               *rs,
1203         ldap_back_send_t        sendok,
1204         struct berval           *binddn,
1205         struct berval           *bindcred,
1206         int                     *method )
1207 {
1208         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1209         metatarget_t            *mt = mi->mi_targets[ candidate ];
1210         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1211         struct berval           ndn;
1212         int                     dobind = 0;
1213
1214         /* don't proxyAuthz if protocol is not LDAPv3 */
1215         switch ( mt->mt_version ) {
1216         case LDAP_VERSION3:
1217                 break;
1218
1219         case 0:
1220                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1221                         break;
1222                 }
1223                 /* fall thru */
1224
1225         default:
1226                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1227                 if ( sendok & LDAP_BACK_SENDERR ) {
1228                         send_ldap_result( op, rs );
1229                 }
1230                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1231                 goto done;
1232         }
1233
1234         if ( op->o_tag == LDAP_REQ_BIND ) {
1235                 ndn = op->o_req_ndn;
1236
1237         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1238                 ndn = op->o_conn->c_ndn;
1239
1240         } else {
1241                 ndn = op->o_ndn;
1242         }
1243
1244         /*
1245          * FIXME: we need to let clients use proxyAuthz
1246          * otherwise we cannot do symmetric pools of servers;
1247          * we have to live with the fact that a user can
1248          * authorize itself as any ID that is allowed
1249          * by the authzTo directive of the "proxyauthzdn".
1250          */
1251         /*
1252          * NOTE: current Proxy Authorization specification
1253          * and implementation do not allow proxy authorization
1254          * control to be provided with Bind requests
1255          */
1256         /*
1257          * if no bind took place yet, but the connection is bound
1258          * and the "proxyauthzdn" is set, then bind as
1259          * "proxyauthzdn" and explicitly add the proxyAuthz
1260          * control to every operation with the dn bound
1261          * to the connection as control value.
1262          */
1263
1264         /* bind as proxyauthzdn only if no idassert mode
1265          * is requested, or if the client's identity
1266          * is authorized */
1267         switch ( mt->mt_idassert_mode ) {
1268         case LDAP_BACK_IDASSERT_LEGACY:
1269                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1270                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1271                         {
1272                                 *binddn = mt->mt_idassert_authcDN;
1273                                 *bindcred = mt->mt_idassert_passwd;
1274                                 dobind = 1;
1275                         }
1276                 }
1277                 break;
1278
1279         default:
1280                 /* NOTE: rootdn can always idassert */
1281                 if ( BER_BVISNULL( &ndn ) && mt->mt_idassert_authz == NULL ) {
1282                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1283                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1284                                 if ( sendok & LDAP_BACK_SENDERR ) {
1285                                         send_ldap_result( op, rs );
1286                                 }
1287                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1288
1289                         } else {
1290                                 rs->sr_err = LDAP_SUCCESS;
1291                                 *binddn = slap_empty_bv;
1292                                 *bindcred = slap_empty_bv;
1293                                 break;
1294                         }
1295
1296                         goto done;
1297
1298                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1299                         struct berval authcDN;
1300
1301                         if ( BER_BVISNULL( &ndn ) ) {
1302                                 authcDN = slap_empty_bv;
1303
1304                         } else {
1305                                 authcDN = ndn;
1306                         }
1307                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1308                                         &authcDN, &authcDN );
1309                         if ( rs->sr_err != LDAP_SUCCESS ) {
1310                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1311                                         if ( sendok & LDAP_BACK_SENDERR ) {
1312                                                 send_ldap_result( op, rs );
1313                                         }
1314                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1315
1316                                 } else {
1317                                         rs->sr_err = LDAP_SUCCESS;
1318                                         *binddn = slap_empty_bv;
1319                                         *bindcred = slap_empty_bv;
1320                                         break;
1321                                 }
1322
1323                                 goto done;
1324                         }
1325                 }
1326
1327                 *binddn = mt->mt_idassert_authcDN;
1328                 *bindcred = mt->mt_idassert_passwd;
1329                 dobind = 1;
1330                 break;
1331         }
1332
1333         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1334 #ifdef HAVE_CYRUS_SASL
1335                 void            *defaults = NULL;
1336                 struct berval   authzID = BER_BVNULL;
1337                 int             freeauthz = 0;
1338
1339                 /* if SASL supports native authz, prepare for it */
1340                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1341                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1342                 {
1343                         switch ( mt->mt_idassert_mode ) {
1344                         case LDAP_BACK_IDASSERT_OTHERID:
1345                         case LDAP_BACK_IDASSERT_OTHERDN:
1346                                 authzID = mt->mt_idassert_authzID;
1347                                 break;
1348
1349                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1350                                 BER_BVSTR( &authzID, "dn:" );
1351                                 break;
1352
1353                         case LDAP_BACK_IDASSERT_SELF:
1354                                 if ( BER_BVISNULL( &ndn ) ) {
1355                                         /* connection is not authc'd, so don't idassert */
1356                                         BER_BVSTR( &authzID, "dn:" );
1357                                         break;
1358                                 }
1359                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1360                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1361                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1362                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1363                                                 ndn.bv_val, ndn.bv_len + 1 );
1364                                 freeauthz = 1;
1365                                 break;
1366
1367                         default:
1368                                 break;
1369                         }
1370                 }
1371
1372                 if ( mt->mt_idassert_secprops != NULL ) {
1373                         rs->sr_err = ldap_set_option( msc->msc_ld,
1374                                 LDAP_OPT_X_SASL_SECPROPS,
1375                                 (void *)mt->mt_idassert_secprops );
1376
1377                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1378                                 rs->sr_err = LDAP_OTHER;
1379                                 if ( sendok & LDAP_BACK_SENDERR ) {
1380                                         send_ldap_result( op, rs );
1381                                 }
1382                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1383                                 goto done;
1384                         }
1385                 }
1386
1387                 defaults = lutil_sasl_defaults( msc->msc_ld,
1388                                 mt->mt_idassert_sasl_mech.bv_val,
1389                                 mt->mt_idassert_sasl_realm.bv_val,
1390                                 mt->mt_idassert_authcID.bv_val,
1391                                 mt->mt_idassert_passwd.bv_val,
1392                                 authzID.bv_val );
1393
1394                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1395                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1396                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1397                                 defaults );
1398
1399                 rs->sr_err = slap_map_api2result( rs );
1400                 if ( rs->sr_err != LDAP_SUCCESS ) {
1401                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1402                         if ( sendok & LDAP_BACK_SENDERR ) {
1403                                 send_ldap_result( op, rs );
1404                         }
1405
1406                 } else {
1407                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1408                 }
1409
1410                 lutil_sasl_freedefs( defaults );
1411                 if ( freeauthz ) {
1412                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1413                 }
1414
1415                 goto done;
1416 #endif /* HAVE_CYRUS_SASL */
1417         }
1418
1419         *method = mt->mt_idassert_authmethod;
1420         switch ( mt->mt_idassert_authmethod ) {
1421         case LDAP_AUTH_NONE:
1422                 BER_BVSTR( binddn, "" );
1423                 BER_BVSTR( bindcred, "" );
1424                 /* fallthru */
1425
1426         case LDAP_AUTH_SIMPLE:
1427                 break;
1428
1429         default:
1430                 /* unsupported! */
1431                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1432                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1433                 if ( sendok & LDAP_BACK_SENDERR ) {
1434                         send_ldap_result( op, rs );
1435                 }
1436                 break;
1437         }
1438
1439 done:;
1440         return rs->sr_err;
1441 }
1442
1443 static int
1444 meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1445 {
1446         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1447         metatarget_t            *mt = mi->mi_targets[ candidate ];
1448         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1449         struct berval           binddn = BER_BVC( "" ),
1450                                 cred = BER_BVC( "" );
1451         int                     method = LDAP_AUTH_NONE,
1452                                 rc;
1453
1454         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1455         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1456                 int     msgid;
1457
1458                 switch ( method ) {
1459                 case LDAP_AUTH_NONE:
1460                 case LDAP_AUTH_SIMPLE:
1461                         for (;;) {
1462                                 rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1463                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1464                                         &cred, NULL, NULL, &msgid );
1465                                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
1466                                         break;
1467                                 }
1468                                 ldap_pvt_thread_yield();
1469                         }
1470                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
1471                         if ( rc == LDAP_SUCCESS ) {
1472                                 /* set rebind stuff in case of successful proxyAuthz bind,
1473                                  * so that referral chasing is attempted using the right
1474                                  * identity */
1475                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1476                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1477
1478                                 if ( LDAP_BACK_SAVECRED( mi ) ) {
1479                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1480                                                 memset( msc->msc_cred.bv_val, 0,
1481                                                         msc->msc_cred.bv_len );
1482                                         }
1483                                         ber_bvreplace( &msc->msc_cred, &cred );
1484                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1485                                 }
1486                         }
1487                         break;
1488
1489                 default:
1490                         assert( 0 );
1491                         break;
1492                 }
1493         }
1494
1495         return LDAP_BACK_CONN_ISBOUND( msc );
1496 }