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 1999-2006 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->mi_conninfo.lai_tree, ">>> 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                                 mc->mc_conn = LDAP_BACK_PCONN_SET( 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->mi_conninfo.lai_tree, "<<< 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 0
 375                         Debug( LDAP_DEBUG_ANY,
 376                                 "%s meta_back_bind_op_result[%d]: ldap_result=0 nretries=%d.\n",
 377                                 op->o_log_prefix, candidate, nretries );
 378 #endif
 379
 380                         if ( nretries != META_RETRY_NEVER
 381                                 || ( timeout && slap_get_time() <= stoptime ) )
 382                         {
 383                                 ldap_pvt_thread_yield();
 384                                 if ( nretries > 0 ) {
 385                                         nretries--;
 386                                 }
 387                                 tv = mt->mt_bind_timeout;
 388                                 goto retry;
 389                         }
 390
 391                         /* don't let anyone else use this handler,
 392                          * because there's a pending bind that will not
 393                          * be acknowledged */
 394                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 395                         assert( LDAP_BACK_CONN_BINDING( msc ) );
 396
 397 #ifdef DEBUG_205
 398                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_bind_op_result ldap_unbind_ext[%d] ld=%p\n",
 399                                 op->o_log_prefix, candidate, (void *)msc->msc_ld );
 400 #endif /* DEBUG_205 */
 401
 402                         meta_clear_one_candidate( op, mc, candidate );
 403                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 404
 405                         rs->sr_err = timeout_err;
 406                         rs->sr_text = timeout_text;
 407                         break;
 408
 409                 case -1:
 410                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
 411                                 &rs->sr_err );
 412
 413                         snprintf( buf, sizeof( buf ),
 414                                 "err=%d (%s) nretries=%d",
 415                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 416                         Debug( LDAP_DEBUG_ANY,
 417                                 "### %s meta_back_bind_op_result[%d]: %s.\n",
 418                                 op->o_log_prefix, candidate, buf );
 419                         break;
 420
 421                 default:
 422                         /* only touch when activity actually took place... */
 423                         if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 424                                 msc->msc_time = op->o_time;
 425                         }
 426
 427                         /* FIXME: matched? referrals? response controls? */
 428                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 429                                         NULL, NULL, NULL, NULL, 1 );
 430                         if ( rc != LDAP_SUCCESS ) {
 431                                 rs->sr_err = rc;
 432                         }
 433                         break;
 434                 }
 435         }
 436
 437         rs->sr_err = slap_map_api2result( rs );
 438
 439         Debug( LDAP_DEBUG_TRACE,
 440                 "<<< %s meta_back_bind_op_result[%d] err=%d\n",
 441                 op->o_log_prefix, candidate, rs->sr_err );
 442
 443         return rs->sr_err;
 444 }
 445
 446 /*
 447  * meta_back_single_bind
 448  *
 449  * attempts to perform a bind with creds
 450  */
 451 static int
 452 meta_back_single_bind(
 453         Operation               *op,
 454         SlapReply               *rs,
 455         metaconn_t              *mc,
 456         int                     candidate )
 457 {
 458         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 459         metatarget_t            *mt = mi->mi_targets[ candidate ];
 460         struct berval           mdn = BER_BVNULL;
 461         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 462         int                     msgid;
 463         dncookie                dc;
 464
 465         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 466                 ch_free( msc->msc_bound_ndn.bv_val );
 467                 BER_BVZERO( &msc->msc_bound_ndn );
 468         }
 469
 470         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 471                 /* destroy sensitive data */
 472                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 473                 ch_free( msc->msc_cred.bv_val );
 474                 BER_BVZERO( &msc->msc_cred );
 475         }
 476
 477         /*
 478          * Rewrite the bind dn if needed
 479          */
 480         dc.target = mt;
 481         dc.conn = op->o_conn;
 482         dc.rs = rs;
 483         dc.ctx = "bindDN";
 484
 485         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 486                 rs->sr_text = "DN rewrite error";
 487                 rs->sr_err = LDAP_OTHER;
 488                 return rs->sr_err;
 489         }
 490
 491         /* FIXME: this fixes the bind problem right now; we need
 492          * to use the asynchronous version to get the "matched"
 493          * and more in case of failure ... */
 494         /* FIXME: should we check if at least some of the op->o_ctrls
 495          * can/should be passed? */
 496         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 497                         LDAP_SASL_SIMPLE, &op->orb_cred,
 498                         op->o_ctrls, NULL, &msgid );
 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         int                     rc;
 568         static struct berval    cred = BER_BVC( "" );
 569         int                     msgid;
 570
 571         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 572
 573         /* NOTE: this obsoletes pseudorootdn */
 574         if ( op->o_conn != NULL &&
 575                 !op->o_do_not_cache &&
 576                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 577                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 578                         ( LDAP_BACK_CONN_ISPRIV( mc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
 579                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 580         {
 581                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
 582                 rc = rs->sr_err;
 583                 goto done;
 584         }
 585
 586         /* FIXME: should we check if at least some of the op->o_ctrls
 587          * can/should be passed? */
 588         rs->sr_err = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 589                         NULL, NULL, &msgid );
 590         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
 591
 592 done:;
 593         rs->sr_err = rc;
 594         if ( rc != LDAP_SUCCESS ) {
 595                 if ( dolock ) {
 596                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 597                 }
 598                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 599                 if ( META_BACK_ONERR_STOP( mi ) ) {
 600                         LDAP_BACK_CONN_TAINTED_SET( mc );
 601                         meta_back_release_conn_lock( op, mc, 0 );
 602                         *mcp = NULL;
 603                 }
 604                 if ( dolock ) {
 605                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 606                 }
 607
 608                 if ( META_BACK_ONERR_STOP( mi ) && ( sendok & LDAP_BACK_SENDERR ) ) {
 609                         send_ldap_result( op, rs );
 610                 }
 611         }
 612
 613         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 614                 meta_back_quarantine( op, rs, candidate );
 615         }
 616
 617         return rc;
 618 }
 619
 620 /*
 621  * meta_back_dobind
 622  */
 623 int
 624 meta_back_dobind(
 625         Operation               *op,
 626         SlapReply               *rs,
 627         metaconn_t              *mc,
 628         ldap_back_send_t        sendok )
 629 {
 630         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 631
 632         int                     bound = 0,
 633                                 i,
 634                                 isroot = 0;
 635
 636         SlapReply               *candidates = meta_back_candidates_get( op );
 637
 638         if ( be_isroot( op ) ) {
 639                 isroot = 1;
 640         }
 641
 642         Debug( LDAP_DEBUG_TRACE,
 643                 "%s meta_back_dobind: conn=%ld%s\n",
 644                 op->o_log_prefix,
 645                 LDAP_BACK_PCONN_ID( mc ),
 646                 isroot ? " (isroot)" : "" );
 647
 648         /*
 649          * all the targets are bound as pseudoroot
 650          */
 651         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 652                 bound = 1;
 653                 goto done;
 654         }
 655
 656         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 657                 metatarget_t            *mt = mi->mi_targets[ i ];
 658                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 659                 int                     rc;
 660
 661                 /*
 662                  * Not a candidate
 663                  */
 664                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 665                         continue;
 666                 }
 667
 668                 assert( msc->msc_ld != NULL );
 669
 670                 /*
 671                  * If the target is already bound it is skipped
 672                  */
 673
 674 retry_binding:;
 675                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 676                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 677                         || ( LDAP_BACK_CONN_ISANON( msc )
 678                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 679                 {
 680                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 681                         ++bound;
 682                         continue;
 683
 684                 } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
 685                 {
 686                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 687                         ldap_pvt_thread_yield();
 688                         goto retry_binding;
 689
 690                 }
 691
 692                 LDAP_BACK_CONN_BINDING_SET( msc );
 693                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 694
 695                 rc = meta_back_single_dobind( op, rs, &mc, i,
 696                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 697                 /*
 698                  * NOTE: meta_back_single_dobind() already retries;
 699                  * in case of failure, it resets mc...
 700                  */
 701                 if ( rc != LDAP_SUCCESS ) {
 702                         char            buf[ SLAP_TEXT_BUFLEN ];
 703
 704                         if ( mc == NULL ) {
 705                                 /* meta_back_single_dobind() already sent
 706                                  * response and released connection */
 707                                 goto send_err;
 708                         }
 709
 710
 711                         if ( rc == LDAP_UNAVAILABLE ) {
 712                                 /* FIXME: meta_back_retry() already re-calls
 713                                  * meta_back_single_dobind() */
 714                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 715                                         goto retry_ok;
 716                                 }
 717
 718                                 if ( mc != NULL ) {
 719                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 720                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 721                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 722                                         meta_back_release_conn( op, mc );
 723                                 }
 724
 725                                 return 0;
 726                         }
 727
 728                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 729                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 730                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 731
 732                         snprintf( buf, sizeof( buf ),
 733                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 734                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 735                                 rc, ldap_err2string( rc ) );
 736                         Debug( LDAP_DEBUG_ANY,
 737                                 "%s %s\n",
 738                                 op->o_log_prefix, buf, 0 );
 739
 740                         /*
 741                          * null cred bind should always succeed
 742                          * as anonymous, so a failure means
 743                          * the target is no longer candidate possibly
 744                          * due to technical reasons (remote host down?)
 745                          * so better clear the handle
 746                          */
 747                         /* leave the target candidate, but record the error for later use */
 748                         candidates[ i ].sr_err = rc;
 749                         if ( META_BACK_ONERR_STOP( mi ) ) {
 750                                 bound = 0;
 751                                 goto done;
 752                         }
 753
 754                         continue;
 755                 } /* else */
 756
 757 retry_ok:;
 758                 Debug( LDAP_DEBUG_TRACE,
 759                         "%s meta_back_dobind[%d]: "
 760                         "(%s)\n",
 761                         op->o_log_prefix, i,
 762                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 763
 764                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 765                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 766                 if ( isroot ) {
 767                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 768                 } else {
 769                         LDAP_BACK_CONN_ISANON_SET( msc );
 770                 }
 771                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 772                 ++bound;
 773         }
 774
 775 done:;
 776         Debug( LDAP_DEBUG_TRACE,
 777                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 778                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc ), bound );
 779
 780         if ( bound == 0 ) {
 781                 meta_back_release_conn( op, mc );
 782
 783 send_err:;
 784                 if ( sendok & LDAP_BACK_SENDERR ) {
 785                         if ( rs->sr_err == LDAP_SUCCESS ) {
 786                                 rs->sr_err = LDAP_BUSY;
 787                         }
 788                         send_ldap_result( op, rs );
 789                 }
 790
 791                 return 0;
 792         }
 793
 794         return ( bound > 0 );
 795 }
 796
 797 /*
 798  * meta_back_default_rebind
 799  *
 800  * This is a callback used for chasing referrals using the same
 801  * credentials as the original user on this session.
 802  */
 803 int
 804 meta_back_default_rebind(
 805         LDAP                    *ld,
 806         LDAP_CONST char         *url,
 807         ber_tag_t               request,
 808         ber_int_t               msgid,
 809         void                    *params )
 810 {
 811         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 812
 813         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 814                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 815                         NULL, NULL, NULL );
 816 }
 817
 818 /*
 819  * meta_back_default_urllist
 820  *
 821  * This is a callback used for mucking with the urllist
 822  */
 823 int
 824 meta_back_default_urllist(
 825         LDAP            *ld,
 826         LDAPURLDesc     **urllist,
 827         LDAPURLDesc     **url,
 828         void            *params )
 829 {
 830         metatarget_t    *mt = (metatarget_t *)params;
 831         LDAPURLDesc     **urltail;
 832
 833         if ( urllist == url ) {
 834                 return LDAP_SUCCESS;
 835         }
 836
 837         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 838                 /* count */ ;
 839
 840         *urltail = *urllist;
 841         *urllist = *url;
 842         *url = NULL;
 843
 844         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 845         if ( mt->mt_uri ) {
 846                 ch_free( mt->mt_uri );
 847         }
 848
 849         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 850         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 851
 852         return LDAP_SUCCESS;
 853 }
 854
 855 int
 856 meta_back_cancel(
 857         metaconn_t              *mc,
 858         Operation               *op,
 859         SlapReply               *rs,
 860         ber_int_t               msgid,
 861         int                     candidate,
 862         ldap_back_send_t        sendok )
 863 {
 864         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 865
 866         metatarget_t            *mt = mi->mi_targets[ candidate ];
 867         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 868
 869         int                     rc = LDAP_OTHER;
 870
 871         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 872                 op->o_log_prefix, candidate, msgid );
 873
 874         /* default behavior */
 875         if ( META_BACK_TGT_ABANDON( mt ) ) {
 876                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 877
 878         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 879                 rc = ldap_pvt_discard( msc->msc_ld, msgid );
 880
 881         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 882                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 883
 884         } else {
 885                 assert( 0 );
 886         }
 887
 888         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 889                 op->o_log_prefix, candidate, rc );
 890
 891         return rc;
 892 }
 893
 894
 895
 896 /*
 897  * FIXME: error return must be handled in a cleaner way ...
 898  */
 899 int
 900 meta_back_op_result(
 901         metaconn_t              *mc,
 902         Operation               *op,
 903         SlapReply               *rs,
 904         int                     candidate,
 905         ber_int_t               msgid,
 906         time_t                  timeout,
 907         ldap_back_send_t        sendok )
 908 {
 909         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 910
 911         const char      *save_text = rs->sr_text,
 912                         *save_matched = rs->sr_matched;
 913         BerVarray       save_ref = rs->sr_ref;
 914         LDAPControl     **save_ctrls = rs->sr_ctrls;
 915         void            *matched_ctx = NULL;
 916
 917         char            *matched = NULL;
 918         char            *text = NULL;
 919         char            **refs = NULL;
 920         LDAPControl     **ctrls = NULL;
 921
 922         assert( mc != NULL );
 923
 924         rs->sr_text = NULL;
 925         rs->sr_matched = NULL;
 926         rs->sr_ref = NULL;
 927         rs->sr_ctrls = NULL;
 928
 929         if ( candidate != META_TARGET_NONE ) {
 930                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 931                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 932
 933 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
 934
 935                 if ( ERR_OK( rs->sr_err ) ) {
 936                         int             rc;
 937                         struct timeval  tv;
 938                         LDAPMessage     *res = NULL;
 939                         time_t          stoptime = (time_t)(-1);
 940                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 941                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 942                         const char      *timeout_text = "Operation timed out";
 943
 944                         /* if timeout is not specified, compute and use
 945                          * the one specific to the ongoing operation */
 946                         if ( timeout == (time_t)(-1) ) {
 947                                 slap_op_t       opidx = slap_req2op( op->o_tag );
 948
 949                                 if ( opidx == SLAP_OP_SEARCH ) {
 950                                         if ( op->ors_tlimit <= 0 ) {
 951                                                 timeout = 0;
 952
 953                                         } else {
 954                                                 timeout = op->ors_tlimit;
 955                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 956                                                 timeout_text = NULL;
 957                                         }
 958
 959                                 } else {
 960                                         timeout = mt->mt_timeout[ opidx ];
 961                                 }
 962                         }
 963
 964                         /* better than nothing :) */
 965                         if ( timeout == 0 ) {
 966                                 if ( mi->mi_idle_timeout ) {
 967                                         timeout = mi->mi_idle_timeout;
 968
 969                                 } else if ( mi->mi_conn_ttl ) {
 970                                         timeout = mi->mi_conn_ttl;
 971                                 }
 972                         }
 973
 974                         if ( timeout ) {
 975                                 stoptime = op->o_time + timeout;
 976                         }
 977
 978                         LDAP_BACK_TV_SET( &tv );
 979
 980 retry:;
 981                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 982                         switch ( rc ) {
 983                         case 0:
 984                                 if ( timeout && slap_get_time() > stoptime ) {
 985                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
 986                                         rs->sr_err = timeout_err;
 987                                         rs->sr_text = timeout_text;
 988                                         break;
 989                                 }
 990
 991                                 LDAP_BACK_TV_SET( &tv );
 992                                 ldap_pvt_thread_yield();
 993                                 goto retry;
 994
 995                         case -1:
 996                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
 997                                                 &rs->sr_err );
 998                                 break;
 999
1000
1001                         /* otherwise get the result; if it is not
1002                          * LDAP_SUCCESS, record it in the reply
1003                          * structure (this includes
1004                          * LDAP_COMPARE_{TRUE|FALSE}) */
1005                         default:
1006                                 /* only touch when activity actually took place... */
1007                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
1008                                         msc->msc_time = op->o_time;
1009                                 }
1010
1011                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
1012                                                 &matched, &text, &refs, &ctrls, 1 );
1013                                 res = NULL;
1014                                 rs->sr_text = text;
1015                                 if ( rc != LDAP_SUCCESS ) {
1016                                         rs->sr_err = rc;
1017                                 }
1018                                 if ( refs != NULL ) {
1019                                         int     i;
1020
1021                                         for ( i = 0; refs[ i ] != NULL; i++ )
1022                                                 /* count */ ;
1023                                         rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1024                                                 op->o_tmpmemctx );
1025                                         for ( i = 0; refs[ i ] != NULL; i++ ) {
1026                                                 ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1027                                         }
1028                                         BER_BVZERO( &rs->sr_ref[ i ] );
1029                                 }
1030                                 if ( ctrls != NULL ) {
1031                                         rs->sr_ctrls = ctrls;
1032                                 }
1033                         }
1034
1035                         assert( res == NULL );
1036                 }
1037
1038                 /* if the error in the reply structure is not
1039                  * LDAP_SUCCESS, try to map it from client
1040                  * to server error */
1041                 if ( !ERR_OK( rs->sr_err ) ) {
1042                         rs->sr_err = slap_map_api2result( rs );
1043
1044                         /* internal ops ( op->o_conn == NULL )
1045                          * must not reply to client */
1046                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1047
1048                                 /* record the (massaged) matched
1049                                  * DN into the reply structure */
1050                                 rs->sr_matched = matched;
1051                         }
1052                 }
1053
1054                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1055                         meta_back_quarantine( op, rs, candidate );
1056                 }
1057
1058         } else {
1059                 int     i,
1060                         err = rs->sr_err;
1061
1062                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1063                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1064                         char                    *xtext = NULL;
1065                         char                    *xmatched = NULL;
1066
1067                         rs->sr_err = LDAP_SUCCESS;
1068
1069                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rs->sr_err );
1070                         if ( rs->sr_err != LDAP_SUCCESS ) {
1071                                 /*
1072                                  * better check the type of error. In some cases
1073                                  * (search ?) it might be better to return a
1074                                  * success if at least one of the targets gave
1075                                  * positive result ...
1076                                  */
1077                                 ldap_get_option( msc->msc_ld,
1078                                                 LDAP_OPT_DIAGNOSTIC_MESSAGE, &xtext );
1079                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1080                                         ldap_memfree( xtext );
1081                                         xtext = NULL;
1082                                 }
1083
1084                                 ldap_get_option( msc->msc_ld,
1085                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1086                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1087                                         ldap_memfree( xmatched );
1088                                         xmatched = NULL;
1089                                 }
1090
1091                                 rs->sr_err = slap_map_api2result( rs );
1092
1093                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1094                                         char    buf[ SLAP_TEXT_BUFLEN ];
1095
1096                                         snprintf( buf, sizeof( buf ),
1097                                                 "meta_back_op_result[%d] "
1098                                                 "err=%d text=\"%s\" matched=\"%s\"",
1099                                                 i, rs->sr_err,
1100                                                 ( xtext ? xtext : "" ),
1101                                                 ( xmatched ? xmatched : "" ) );
1102                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1103                                                 op->o_log_prefix, buf, 0 );
1104                                 }
1105
1106                                 /*
1107                                  * FIXME: need to rewrite "match" (need rwinfo)
1108                                  */
1109                                 switch ( rs->sr_err ) {
1110                                 default:
1111                                         err = rs->sr_err;
1112                                         if ( xtext != NULL ) {
1113                                                 if ( text ) {
1114                                                         ldap_memfree( text );
1115                                                 }
1116                                                 text = xtext;
1117                                                 xtext = NULL;
1118                                         }
1119                                         if ( xmatched != NULL ) {
1120                                                 if ( matched ) {
1121                                                         ldap_memfree( matched );
1122                                                 }
1123                                                 matched = xmatched;
1124                                                 xmatched = NULL;
1125                                         }
1126                                         break;
1127                                 }
1128
1129                                 if ( xtext ) {
1130                                         ldap_memfree( xtext );
1131                                 }
1132
1133                                 if ( xmatched ) {
1134                                         ldap_memfree( xmatched );
1135                                 }
1136                         }
1137
1138                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1139                                 meta_back_quarantine( op, rs, i );
1140                         }
1141                 }
1142
1143                 if ( err != LDAP_SUCCESS ) {
1144                         rs->sr_err = err;
1145                 }
1146         }
1147
1148         if ( matched != NULL ) {
1149                 struct berval   dn, pdn;
1150
1151                 ber_str2bv( matched, 0, 0, &dn );
1152                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1153                         ldap_memfree( matched );
1154                         matched_ctx = op->o_tmpmemctx;
1155                         matched = pdn.bv_val;
1156                 }
1157                 rs->sr_matched = matched;
1158         }
1159
1160         if ( op->o_conn &&
1161                 ( ( sendok & LDAP_BACK_SENDOK )
1162                         || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1163         {
1164                 send_ldap_result( op, rs );
1165         }
1166         if ( matched ) {
1167                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1168         }
1169         if ( text ) {
1170                 ldap_memfree( text );
1171         }
1172         if ( rs->sr_ref ) {
1173                 assert( refs != NULL );
1174                 ber_memvfree( (void **)refs );
1175                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1176         }
1177         if ( ctrls ) {
1178                 assert( rs->sr_ctrls != NULL );
1179                 ldap_controls_free( ctrls );
1180         }
1181
1182         rs->sr_text = save_text;
1183         rs->sr_matched = save_matched;
1184         rs->sr_ref = save_ref;
1185         rs->sr_ctrls = save_ctrls;
1186
1187         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1188 }
1189
1190 /*
1191  * meta_back_proxy_authz_cred()
1192  *
1193  * prepares credentials & method for meta_back_proxy_authz_bind();
1194  * or, if method is SASL, performs the SASL bind directly.
1195  */
1196 int
1197 meta_back_proxy_authz_cred(
1198         metaconn_t              *mc,
1199         int                     candidate,
1200         Operation               *op,
1201         SlapReply               *rs,
1202         ldap_back_send_t        sendok,
1203         struct berval           *binddn,
1204         struct berval           *bindcred,
1205         int                     *method )
1206 {
1207         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1208         metatarget_t            *mt = mi->mi_targets[ candidate ];
1209         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1210         struct berval           ndn;
1211         int                     dobind = 0;
1212
1213         /* don't proxyAuthz if protocol is not LDAPv3 */
1214         switch ( mt->mt_version ) {
1215         case LDAP_VERSION3:
1216                 break;
1217
1218         case 0:
1219                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1220                         break;
1221                 }
1222                 /* fall thru */
1223
1224         default:
1225                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1226                 if ( sendok & LDAP_BACK_SENDERR ) {
1227                         send_ldap_result( op, rs );
1228                 }
1229                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1230                 goto done;
1231         }
1232
1233         if ( op->o_tag == LDAP_REQ_BIND ) {
1234                 ndn = op->o_req_ndn;
1235
1236         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1237                 ndn = op->o_conn->c_ndn;
1238
1239         } else {
1240                 ndn = op->o_ndn;
1241         }
1242
1243         /*
1244          * FIXME: we need to let clients use proxyAuthz
1245          * otherwise we cannot do symmetric pools of servers;
1246          * we have to live with the fact that a user can
1247          * authorize itself as any ID that is allowed
1248          * by the authzTo directive of the "proxyauthzdn".
1249          */
1250         /*
1251          * NOTE: current Proxy Authorization specification
1252          * and implementation do not allow proxy authorization
1253          * control to be provided with Bind requests
1254          */
1255         /*
1256          * if no bind took place yet, but the connection is bound
1257          * and the "proxyauthzdn" is set, then bind as
1258          * "proxyauthzdn" and explicitly add the proxyAuthz
1259          * control to every operation with the dn bound
1260          * to the connection as control value.
1261          */
1262
1263         /* bind as proxyauthzdn only if no idassert mode
1264          * is requested, or if the client's identity
1265          * is authorized */
1266         switch ( mt->mt_idassert_mode ) {
1267         case LDAP_BACK_IDASSERT_LEGACY:
1268                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1269                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1270                         {
1271                                 *binddn = mt->mt_idassert_authcDN;
1272                                 *bindcred = mt->mt_idassert_passwd;
1273                                 dobind = 1;
1274                         }
1275                 }
1276                 break;
1277
1278         default:
1279                 /* NOTE: rootdn can always idassert */
1280                 if ( BER_BVISNULL( &ndn ) && mt->mt_idassert_authz == NULL ) {
1281                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1282                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1283                                 if ( sendok & LDAP_BACK_SENDERR ) {
1284                                         send_ldap_result( op, rs );
1285                                 }
1286                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1287
1288                         } else {
1289                                 rs->sr_err = LDAP_SUCCESS;
1290                                 *binddn = slap_empty_bv;
1291                                 *bindcred = slap_empty_bv;
1292                                 break;
1293                         }
1294
1295                         goto done;
1296
1297                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1298                         struct berval authcDN;
1299
1300                         if ( BER_BVISNULL( &ndn ) ) {
1301                                 authcDN = slap_empty_bv;
1302
1303                         } else {
1304                                 authcDN = ndn;
1305                         }
1306                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1307                                         &authcDN, &authcDN );
1308                         if ( rs->sr_err != LDAP_SUCCESS ) {
1309                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1310                                         if ( sendok & LDAP_BACK_SENDERR ) {
1311                                                 send_ldap_result( op, rs );
1312                                         }
1313                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1314
1315                                 } else {
1316                                         rs->sr_err = LDAP_SUCCESS;
1317                                         *binddn = slap_empty_bv;
1318                                         *bindcred = slap_empty_bv;
1319                                         break;
1320                                 }
1321
1322                                 goto done;
1323                         }
1324                 }
1325
1326                 *binddn = mt->mt_idassert_authcDN;
1327                 *bindcred = mt->mt_idassert_passwd;
1328                 dobind = 1;
1329                 break;
1330         }
1331
1332         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1333 #ifdef HAVE_CYRUS_SASL
1334                 void            *defaults = NULL;
1335                 struct berval   authzID = BER_BVNULL;
1336                 int             freeauthz = 0;
1337
1338                 /* if SASL supports native authz, prepare for it */
1339                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1340                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1341                 {
1342                         switch ( mt->mt_idassert_mode ) {
1343                         case LDAP_BACK_IDASSERT_OTHERID:
1344                         case LDAP_BACK_IDASSERT_OTHERDN:
1345                                 authzID = mt->mt_idassert_authzID;
1346                                 break;
1347
1348                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1349                                 BER_BVSTR( &authzID, "dn:" );
1350                                 break;
1351
1352                         case LDAP_BACK_IDASSERT_SELF:
1353                                 if ( BER_BVISNULL( &ndn ) ) {
1354                                         /* connection is not authc'd, so don't idassert */
1355                                         BER_BVSTR( &authzID, "dn:" );
1356                                         break;
1357                                 }
1358                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1359                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1360                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1361                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1362                                                 ndn.bv_val, ndn.bv_len + 1 );
1363                                 freeauthz = 1;
1364                                 break;
1365
1366                         default:
1367                                 break;
1368                         }
1369                 }
1370
1371                 if ( mt->mt_idassert_secprops != NULL ) {
1372                         rs->sr_err = ldap_set_option( msc->msc_ld,
1373                                 LDAP_OPT_X_SASL_SECPROPS,
1374                                 (void *)mt->mt_idassert_secprops );
1375
1376                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1377                                 rs->sr_err = LDAP_OTHER;
1378                                 if ( sendok & LDAP_BACK_SENDERR ) {
1379                                         send_ldap_result( op, rs );
1380                                 }
1381                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1382                                 goto done;
1383                         }
1384                 }
1385
1386                 defaults = lutil_sasl_defaults( msc->msc_ld,
1387                                 mt->mt_idassert_sasl_mech.bv_val,
1388                                 mt->mt_idassert_sasl_realm.bv_val,
1389                                 mt->mt_idassert_authcID.bv_val,
1390                                 mt->mt_idassert_passwd.bv_val,
1391                                 authzID.bv_val );
1392
1393                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1394                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1395                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1396                                 defaults );
1397
1398                 rs->sr_err = slap_map_api2result( rs );
1399                 if ( rs->sr_err != LDAP_SUCCESS ) {
1400                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1401                         if ( sendok & LDAP_BACK_SENDERR ) {
1402                                 send_ldap_result( op, rs );
1403                         }
1404
1405                 } else {
1406                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1407                 }
1408
1409                 lutil_sasl_freedefs( defaults );
1410                 if ( freeauthz ) {
1411                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1412                 }
1413
1414                 goto done;
1415 #endif /* HAVE_CYRUS_SASL */
1416         }
1417
1418         *method = mt->mt_idassert_authmethod;
1419         switch ( mt->mt_idassert_authmethod ) {
1420         case LDAP_AUTH_NONE:
1421                 BER_BVSTR( binddn, "" );
1422                 BER_BVSTR( bindcred, "" );
1423                 /* fallthru */
1424
1425         case LDAP_AUTH_SIMPLE:
1426                 break;
1427
1428         default:
1429                 /* unsupported! */
1430                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1431                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1432                 if ( sendok & LDAP_BACK_SENDERR ) {
1433                         send_ldap_result( op, rs );
1434                 }
1435                 break;
1436         }
1437
1438 done:;
1439         return rs->sr_err;
1440 }
1441
1442 static int
1443 meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1444 {
1445         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1446         metatarget_t            *mt = mi->mi_targets[ candidate ];
1447         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1448         struct berval           binddn = BER_BVC( "" ),
1449                                 cred = BER_BVC( "" );
1450         int                     method = LDAP_AUTH_NONE,
1451                                 rc;
1452
1453         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1454         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1455                 int     msgid;
1456
1457                 switch ( method ) {
1458                 case LDAP_AUTH_NONE:
1459                 case LDAP_AUTH_SIMPLE:
1460                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1461                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1462                                         &cred, NULL, NULL, &msgid );
1463                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
1464                         if ( rc == LDAP_SUCCESS ) {
1465                                 /* set rebind stuff in case of successful proxyAuthz bind,
1466                                  * so that referral chasing is attempted using the right
1467                                  * identity */
1468                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1469                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1470
1471                                 if ( LDAP_BACK_SAVECRED( mi ) ) {
1472                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1473                                                 memset( msc->msc_cred.bv_val, 0,
1474                                                         msc->msc_cred.bv_len );
1475                                         }
1476                                         ber_bvreplace( &msc->msc_cred, &cred );
1477                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1478                                 }
1479                         }
1480                         break;
1481
1482                 default:
1483                         assert( 0 );
1484                         break;
1485                 }
1486         }
1487
1488         return LDAP_BACK_CONN_ISBOUND( msc );
1489 }