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