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                 time_t          stoptime = (time_t)(-1),
 323                                 timeout;
 324                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 325                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 326                 const char      *timeout_text = "Operation timed out";
 327                 slap_op_t       opidx = slap_req2op( op->o_tag );
 328
 329                 /* since timeout is not specified, compute and use
 330                  * the one specific to the ongoing operation */
 331                 if ( opidx == LDAP_REQ_SEARCH ) {
 332                         if ( op->ors_tlimit <= 0 ) {
 333                                 timeout = 0;
 334
 335                         } else {
 336                                 timeout = op->ors_tlimit;
 337                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 338                                 timeout_text = NULL;
 339                         }
 340
 341                 } else {
 342                         timeout = mt->mt_timeout[ opidx ];
 343                 }
 344
 345                 /* better than nothing :) */
 346                 if ( timeout == 0 ) {
 347                         if ( mi->mi_idle_timeout ) {
 348                                 timeout = mi->mi_idle_timeout;
 349
 350                         } else if ( mi->mi_conn_ttl ) {
 351                                 timeout = mi->mi_conn_ttl;
 352                         }
 353                 }
 354
 355                 if ( timeout ) {
 356                         stoptime = op->o_time + timeout;
 357                 }
 358
 359                 LDAP_BACK_TV_SET( &tv );
 360
 361                 /*
 362                  * handle response!!!
 363                  */
 364 retry:;
 365                 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 366                 switch ( rc ) {
 367                 case 0:
 368 #if 0
 369                         Debug( LDAP_DEBUG_ANY,
 370                                 "%s meta_back_bind_op_result[%d]: ldap_result=0 nretries=%d.\n",
 371                                 op->o_log_prefix, candidate, nretries );
 372 #endif
 373
 374                         if ( nretries != META_RETRY_NEVER
 375                                 || ( timeout && slap_get_time() <= stoptime ) )
 376                         {
 377                                 ldap_pvt_thread_yield();
 378                                 if ( nretries > 0 ) {
 379                                         nretries--;
 380                                 }
 381                                 tv = mt->mt_bind_timeout;
 382                                 goto retry;
 383                         }
 384
 385                         /* don't let anyone else use this handler,
 386                          * because there's a pending bind that will not
 387                          * be acknowledged */
 388                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 389                         ldap_unbind_ext( msc->msc_ld, NULL, NULL );
 390                         msc->msc_ld = NULL;
 391                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 392                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 393
 394                         rs->sr_err = timeout_err;
 395                         rs->sr_text = timeout_text;
 396                         break;
 397
 398                 case -1:
 399                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 400                                 &rs->sr_err );
 401
 402                         snprintf( buf, sizeof( buf ),
 403                                 "err=%d (%s) nretries=%d",
 404                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 405                         Debug( LDAP_DEBUG_ANY,
 406                                 "### %s meta_back_bind_op_result[%d]: %s.\n",
 407                                 op->o_log_prefix, candidate, buf );
 408                         break;
 409
 410                 default:
 411                         /* only touch when activity actually took place... */
 412                         if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 413                                 msc->msc_time = op->o_time;
 414                         }
 415
 416                         /* FIXME: matched? referrals? response controls? */
 417                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 418                                         NULL, NULL, NULL, NULL, 1 );
 419                         if ( rc != LDAP_SUCCESS ) {
 420                                 rs->sr_err = rc;
 421                         }
 422                         break;
 423                 }
 424         }
 425
 426         rs->sr_err = slap_map_api2result( rs );
 427
 428         Debug( LDAP_DEBUG_TRACE,
 429                 "<<< %s meta_back_bind_op_result[%d] err=%d\n",
 430                 op->o_log_prefix, candidate, rs->sr_err );
 431
 432         return rs->sr_err;
 433 }
 434
 435 /*
 436  * meta_back_single_bind
 437  *
 438  * attempts to perform a bind with creds
 439  */
 440 static int
 441 meta_back_single_bind(
 442         Operation               *op,
 443         SlapReply               *rs,
 444         metaconn_t              *mc,
 445         int                     candidate )
 446 {
 447         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 448         metatarget_t            *mt = mi->mi_targets[ candidate ];
 449         struct berval           mdn = BER_BVNULL;
 450         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 451         int                     msgid;
 452         dncookie                dc;
 453
 454         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 455                 ch_free( msc->msc_bound_ndn.bv_val );
 456                 BER_BVZERO( &msc->msc_bound_ndn );
 457         }
 458
 459         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 460                 /* destroy sensitive data */
 461                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 462                 ch_free( msc->msc_cred.bv_val );
 463                 BER_BVZERO( &msc->msc_cred );
 464         }
 465
 466         /*
 467          * Rewrite the bind dn if needed
 468          */
 469         dc.target = mt;
 470         dc.conn = op->o_conn;
 471         dc.rs = rs;
 472         dc.ctx = "bindDN";
 473
 474         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 475                 rs->sr_text = "DN rewrite error";
 476                 rs->sr_err = LDAP_OTHER;
 477                 return rs->sr_err;
 478         }
 479
 480         /* FIXME: this fixes the bind problem right now; we need
 481          * to use the asynchronous version to get the "matched"
 482          * and more in case of failure ... */
 483         /* FIXME: should we check if at least some of the op->o_ctrls
 484          * can/should be passed? */
 485         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 486                         LDAP_SASL_SIMPLE, &op->orb_cred,
 487                         op->o_ctrls, NULL, &msgid );
 488         meta_back_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND );
 489         if ( rs->sr_err != LDAP_SUCCESS ) {
 490                 goto return_results;
 491         }
 492
 493         /* If defined, proxyAuthz will be used also when
 494          * back-ldap is the authorizing backend; for this
 495          * purpose, a successful bind is followed by a
 496          * bind with the configured identity assertion */
 497         /* NOTE: use with care */
 498         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 499                 meta_back_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR );
 500                 if ( !LDAP_BACK_CONN_ISBOUND( msc ) ) {
 501                         goto return_results;
 502                 }
 503                 goto cache_refresh;
 504         }
 505
 506         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_ndn );
 507         LDAP_BACK_CONN_ISBOUND_SET( msc );
 508         mc->mc_authz_target = candidate;
 509
 510         if ( LDAP_BACK_SAVECRED( mi ) ) {
 511                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 512                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 513         }
 514
 515 cache_refresh:;
 516         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 517                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 518         {
 519                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 520                                 &op->o_req_ndn, candidate );
 521         }
 522
 523 return_results:;
 524         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 525                 free( mdn.bv_val );
 526         }
 527
 528         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 529                 meta_back_quarantine( op, rs, candidate );
 530         }
 531
 532         return rs->sr_err;
 533 }
 534
 535 /*
 536  * meta_back_single_dobind
 537  */
 538 int
 539 meta_back_single_dobind(
 540         Operation               *op,
 541         SlapReply               *rs,
 542         metaconn_t              **mcp,
 543         int                     candidate,
 544         ldap_back_send_t        sendok,
 545         int                     nretries,
 546         int                     dolock )
 547 {
 548         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 549         metatarget_t            *mt = mi->mi_targets[ candidate ];
 550         metaconn_t              *mc = *mcp;
 551         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 552         int                     rc;
 553         static struct berval    cred = BER_BVC( "" );
 554         int                     msgid;
 555
 556         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 557
 558         /* NOTE: this obsoletes pseudorootdn */
 559         if ( op->o_conn != NULL &&
 560                 !op->o_do_not_cache &&
 561                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 562                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 563                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 564         {
 565                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
 566                 rc = rs->sr_err;
 567                 goto done;
 568         }
 569
 570         /* FIXME: should we check if at least some of the op->o_ctrls
 571          * can/should be passed? */
 572         rs->sr_err = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 573                         NULL, NULL, &msgid );
 574         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
 575
 576 done:;
 577         rs->sr_err = rc;
 578         if ( rc != LDAP_SUCCESS ) {
 579                 if ( dolock ) {
 580                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 581                 }
 582                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 583                 if ( META_BACK_ONERR_STOP( mi ) ) {
 584                         LDAP_BACK_CONN_TAINTED_SET( mc );
 585                         meta_back_release_conn_lock( op, mc, 0 );
 586                         *mcp = NULL;
 587                 }
 588                 if ( dolock ) {
 589                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 590                 }
 591
 592                 if ( META_BACK_ONERR_STOP( mi ) && ( sendok & LDAP_BACK_SENDERR ) ) {
 593                         send_ldap_result( op, rs );
 594                 }
 595         }
 596
 597         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 598                 meta_back_quarantine( op, rs, candidate );
 599         }
 600
 601         return rc;
 602 }
 603
 604 /*
 605  * meta_back_dobind
 606  */
 607 int
 608 meta_back_dobind(
 609         Operation               *op,
 610         SlapReply               *rs,
 611         metaconn_t              *mc,
 612         ldap_back_send_t        sendok )
 613 {
 614         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 615
 616         int                     bound = 0,
 617                                 i,
 618                                 isroot = 0;
 619
 620         SlapReply               *candidates = meta_back_candidates_get( op );
 621
 622         if ( be_isroot( op ) ) {
 623                 isroot = 1;
 624         }
 625
 626         Debug( LDAP_DEBUG_TRACE,
 627                 "%s meta_back_dobind: conn=%ld%s\n",
 628                 op->o_log_prefix,
 629                 LDAP_BACK_PCONN_ID( mc->mc_conn ),
 630                 isroot ? " (isroot)" : "" );
 631
 632         /*
 633          * all the targets are bound as pseudoroot
 634          */
 635         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 636                 bound = 1;
 637                 goto done;
 638         }
 639
 640         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 641                 metatarget_t            *mt = mi->mi_targets[ i ];
 642                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 643                 int                     rc;
 644
 645                 /*
 646                  * Not a candidate
 647                  */
 648                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 649                         continue;
 650                 }
 651
 652                 assert( msc->msc_ld != NULL );
 653
 654                 /*
 655                  * If the target is already bound it is skipped
 656                  */
 657
 658 retry_binding:;
 659                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 660                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 661                         || ( LDAP_BACK_CONN_ISANON( msc )
 662                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 663                 {
 664                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 665                         ++bound;
 666                         continue;
 667
 668                 } else if ( LDAP_BACK_CONN_BINDING( msc ) ) {
 669                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 670                         ldap_pvt_thread_yield();
 671                         goto retry_binding;
 672
 673                 }
 674
 675                 LDAP_BACK_CONN_BINDING_SET( msc );
 676                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 677
 678                 rc = meta_back_single_dobind( op, rs, &mc, i,
 679                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 680                 /*
 681                  * NOTE: meta_back_single_dobind() already retries;
 682                  * in case of failure, it resets mc...
 683                  */
 684                 if ( rc != LDAP_SUCCESS ) {
 685                         char            buf[ SLAP_TEXT_BUFLEN ];
 686
 687                         if ( mc == NULL ) {
 688                                 /* meta_back_single_dobind() already sent
 689                                  * response and released connection */
 690                                 goto send_err;
 691                         }
 692
 693
 694                         if ( rc == LDAP_UNAVAILABLE ) {
 695                                 /* FIXME: meta_back_retry() already calls
 696                                  * meta_back_single_dobind() */
 697                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 698                                         goto retry_ok;
 699                                 }
 700
 701                                 if ( mc != NULL ) {
 702                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 703                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 704                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 705                                 }
 706
 707                                 return 0;
 708                         }
 709
 710                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 711                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 712                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 713
 714                         snprintf( buf, sizeof( buf ),
 715                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 716                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 717                                 rc, ldap_err2string( rc ) );
 718                         Debug( LDAP_DEBUG_ANY,
 719                                 "%s %s\n",
 720                                 op->o_log_prefix, buf, 0 );
 721
 722                         /*
 723                          * null cred bind should always succeed
 724                          * as anonymous, so a failure means
 725                          * the target is no longer candidate possibly
 726                          * due to technical reasons (remote host down?)
 727                          * so better clear the handle
 728                          */
 729                         /* leave the target candidate, but record the error for later use */
 730                         candidates[ i ].sr_err = rc;
 731                         if ( META_BACK_ONERR_STOP( mi ) ) {
 732                                 bound = 0;
 733                                 goto done;
 734                         }
 735
 736                         continue;
 737                 } /* else */
 738
 739 retry_ok:;
 740                 Debug( LDAP_DEBUG_TRACE,
 741                         "%s meta_back_dobind[%d]: "
 742                         "(%s)\n",
 743                         op->o_log_prefix, i,
 744                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 745
 746                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 747                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 748                 if ( isroot ) {
 749                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 750                 } else {
 751                         LDAP_BACK_CONN_ISANON_SET( msc );
 752                 }
 753                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 754                 ++bound;
 755         }
 756
 757 done:;
 758         Debug( LDAP_DEBUG_TRACE,
 759                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 760                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc->mc_conn ), bound );
 761
 762         if ( bound == 0 ) {
 763                 meta_back_release_conn( op, mc );
 764
 765 send_err:;
 766                 if ( sendok & LDAP_BACK_SENDERR ) {
 767                         if ( rs->sr_err == LDAP_SUCCESS ) {
 768                                 rs->sr_err = LDAP_BUSY;
 769                         }
 770                         send_ldap_result( op, rs );
 771                 }
 772
 773                 return 0;
 774         }
 775
 776         return ( bound > 0 );
 777 }
 778
 779 /*
 780  * meta_back_default_rebind
 781  *
 782  * This is a callback used for chasing referrals using the same
 783  * credentials as the original user on this session.
 784  */
 785 int
 786 meta_back_default_rebind(
 787         LDAP                    *ld,
 788         LDAP_CONST char         *url,
 789         ber_tag_t               request,
 790         ber_int_t               msgid,
 791         void                    *params )
 792 {
 793         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 794
 795         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 796                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 797                         NULL, NULL, NULL );
 798 }
 799
 800 /*
 801  * meta_back_default_urllist
 802  *
 803  * This is a callback used for mucking with the urllist
 804  */
 805 int
 806 meta_back_default_urllist(
 807         LDAP            *ld,
 808         LDAPURLDesc     **urllist,
 809         LDAPURLDesc     **url,
 810         void            *params )
 811 {
 812         metatarget_t    *mt = (metatarget_t *)params;
 813         LDAPURLDesc     **urltail;
 814
 815         if ( urllist == url ) {
 816                 return LDAP_SUCCESS;
 817         }
 818
 819         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 820                 /* count */ ;
 821
 822         *urltail = *urllist;
 823         *urllist = *url;
 824         *url = NULL;
 825
 826         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 827         if ( mt->mt_uri ) {
 828                 ch_free( mt->mt_uri );
 829         }
 830
 831         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 832         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 833
 834         return LDAP_SUCCESS;
 835 }
 836
 837 int
 838 meta_back_cancel(
 839         metaconn_t              *mc,
 840         Operation               *op,
 841         SlapReply               *rs,
 842         ber_int_t               msgid,
 843         int                     candidate,
 844         ldap_back_send_t        sendok )
 845 {
 846         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 847
 848         metatarget_t            *mt = mi->mi_targets[ candidate ];
 849         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 850
 851         int                     rc = LDAP_OTHER;
 852
 853         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 854                 op->o_log_prefix, candidate, msgid );
 855
 856         /* default behavior */
 857         if ( META_BACK_TGT_ABANDON( mt ) ) {
 858                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 859
 860         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 861                 rc = LDAP_SUCCESS;
 862
 863         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 864                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 865
 866         } else {
 867                 assert( 0 );
 868         }
 869
 870         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 871                 op->o_log_prefix, candidate, rc );
 872
 873         return rc;
 874 }
 875
 876
 877
 878 /*
 879  * FIXME: error return must be handled in a cleaner way ...
 880  */
 881 int
 882 meta_back_op_result(
 883         metaconn_t              *mc,
 884         Operation               *op,
 885         SlapReply               *rs,
 886         int                     candidate,
 887         ber_int_t               msgid,
 888         time_t                  timeout,
 889         ldap_back_send_t        sendok )
 890 {
 891         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 892
 893         const char      *save_text = rs->sr_text,
 894                         *save_matched = rs->sr_matched;
 895         BerVarray       save_ref = rs->sr_ref;
 896         LDAPControl     **save_ctrls = rs->sr_ctrls;
 897         void            *matched_ctx = NULL;
 898
 899         char            *matched = NULL;
 900         char            *text = NULL;
 901         char            **refs = NULL;
 902         LDAPControl     **ctrls = NULL;
 903
 904         assert( mc != NULL );
 905
 906         rs->sr_text = NULL;
 907         rs->sr_matched = NULL;
 908         rs->sr_ref = NULL;
 909         rs->sr_ctrls = NULL;
 910
 911         if ( candidate != META_TARGET_NONE ) {
 912                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 913                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 914
 915 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
 916
 917                 if ( ERR_OK( rs->sr_err ) ) {
 918                         int             rc;
 919                         struct timeval  tv;
 920                         LDAPMessage     *res = NULL;
 921                         time_t          stoptime = (time_t)(-1);
 922                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 923                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 924                         const char      *timeout_text = "Operation timed out";
 925
 926                         /* if timeout is not specified, compute and use
 927                          * the one specific to the ongoing operation */
 928                         if ( timeout == (time_t)(-1) ) {
 929                                 slap_op_t       opidx = slap_req2op( op->o_tag );
 930
 931                                 if ( opidx == SLAP_OP_SEARCH ) {
 932                                         if ( op->ors_tlimit <= 0 ) {
 933                                                 timeout = 0;
 934
 935                                         } else {
 936                                                 timeout = op->ors_tlimit;
 937                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 938                                                 timeout_text = NULL;
 939                                         }
 940
 941                                 } else {
 942                                         timeout = mt->mt_timeout[ opidx ];
 943                                 }
 944                         }
 945
 946                         /* better than nothing :) */
 947                         if ( timeout == 0 ) {
 948                                 if ( mi->mi_idle_timeout ) {
 949                                         timeout = mi->mi_idle_timeout;
 950
 951                                 } else if ( mi->mi_conn_ttl ) {
 952                                         timeout = mi->mi_conn_ttl;
 953                                 }
 954                         }
 955
 956                         if ( timeout ) {
 957                                 stoptime = op->o_time + timeout;
 958                         }
 959
 960                         LDAP_BACK_TV_SET( &tv );
 961
 962 retry:;
 963                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 964                         switch ( rc ) {
 965                         case 0:
 966                                 if ( timeout && slap_get_time() > stoptime ) {
 967                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
 968                                         rs->sr_err = timeout_err;
 969                                         rs->sr_text = timeout_text;
 970                                         break;
 971                                 }
 972
 973                                 LDAP_BACK_TV_SET( &tv );
 974                                 ldap_pvt_thread_yield();
 975                                 goto retry;
 976
 977                         case -1:
 978                                 ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 979                                                 &rs->sr_err );
 980                                 break;
 981
 982
 983                         /* otherwise get the result; if it is not
 984                          * LDAP_SUCCESS, record it in the reply
 985                          * structure (this includes
 986                          * LDAP_COMPARE_{TRUE|FALSE}) */
 987                         default:
 988                                 /* only touch when activity actually took place... */
 989                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 990                                         msc->msc_time = op->o_time;
 991                                 }
 992
 993                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 994                                                 &matched, &text, &refs, &ctrls, 1 );
 995                                 res = NULL;
 996                                 rs->sr_text = text;
 997                                 if ( rc != LDAP_SUCCESS ) {
 998                                         rs->sr_err = rc;
 999                                 }
1000                                 if ( refs != NULL ) {
1001                                         int     i;
1002
1003                                         for ( i = 0; refs[ i ] != NULL; i++ )
1004                                                 /* count */ ;
1005                                         rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1006                                                 op->o_tmpmemctx );
1007                                         for ( i = 0; refs[ i ] != NULL; i++ ) {
1008                                                 ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1009                                         }
1010                                         BER_BVZERO( &rs->sr_ref[ i ] );
1011                                 }
1012                                 if ( ctrls != NULL ) {
1013                                         rs->sr_ctrls = ctrls;
1014                                 }
1015                         }
1016
1017                         assert( res == NULL );
1018                 }
1019
1020                 /* if the error in the reply structure is not
1021                  * LDAP_SUCCESS, try to map it from client
1022                  * to server error */
1023                 if ( !ERR_OK( rs->sr_err ) ) {
1024                         rs->sr_err = slap_map_api2result( rs );
1025
1026                         /* internal ops ( op->o_conn == NULL )
1027                          * must not reply to client */
1028                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1029
1030                                 /* record the (massaged) matched
1031                                  * DN into the reply structure */
1032                                 rs->sr_matched = matched;
1033                         }
1034                 }
1035
1036                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1037                         meta_back_quarantine( op, rs, candidate );
1038                 }
1039
1040         } else {
1041                 int     i,
1042                         err = rs->sr_err;
1043
1044                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1045                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1046                         char                    *xtext = NULL;
1047                         char                    *xmatched = NULL;
1048
1049                         rs->sr_err = LDAP_SUCCESS;
1050
1051                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
1052                         if ( rs->sr_err != LDAP_SUCCESS ) {
1053                                 /*
1054                                  * better check the type of error. In some cases
1055                                  * (search ?) it might be better to return a
1056                                  * success if at least one of the targets gave
1057                                  * positive result ...
1058                                  */
1059                                 ldap_get_option( msc->msc_ld,
1060                                                 LDAP_OPT_ERROR_STRING, &xtext );
1061                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1062                                         ldap_memfree( xtext );
1063                                         xtext = NULL;
1064                                 }
1065
1066                                 ldap_get_option( msc->msc_ld,
1067                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1068                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1069                                         ldap_memfree( xmatched );
1070                                         xmatched = NULL;
1071                                 }
1072
1073                                 rs->sr_err = slap_map_api2result( rs );
1074
1075                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1076                                         char    buf[ SLAP_TEXT_BUFLEN ];
1077
1078                                         snprintf( buf, sizeof( buf ),
1079                                                 "meta_back_op_result[%d] "
1080                                                 "err=%d text=\"%s\" matched=\"%s\"",
1081                                                 i, rs->sr_err,
1082                                                 ( xtext ? xtext : "" ),
1083                                                 ( xmatched ? xmatched : "" ) );
1084                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1085                                                 op->o_log_prefix, buf, 0 );
1086                                 }
1087
1088                                 /*
1089                                  * FIXME: need to rewrite "match" (need rwinfo)
1090                                  */
1091                                 switch ( rs->sr_err ) {
1092                                 default:
1093                                         err = rs->sr_err;
1094                                         if ( xtext != NULL ) {
1095                                                 if ( text ) {
1096                                                         ldap_memfree( text );
1097                                                 }
1098                                                 text = xtext;
1099                                                 xtext = NULL;
1100                                         }
1101                                         if ( xmatched != NULL ) {
1102                                                 if ( matched ) {
1103                                                         ldap_memfree( matched );
1104                                                 }
1105                                                 matched = xmatched;
1106                                                 xmatched = NULL;
1107                                         }
1108                                         break;
1109                                 }
1110
1111                                 if ( xtext ) {
1112                                         ldap_memfree( xtext );
1113                                 }
1114
1115                                 if ( xmatched ) {
1116                                         ldap_memfree( xmatched );
1117                                 }
1118                         }
1119
1120                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1121                                 meta_back_quarantine( op, rs, i );
1122                         }
1123                 }
1124
1125                 if ( err != LDAP_SUCCESS ) {
1126                         rs->sr_err = err;
1127                 }
1128         }
1129
1130         if ( matched != NULL ) {
1131                 struct berval   dn, pdn;
1132
1133                 ber_str2bv( matched, 0, 0, &dn );
1134                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1135                         ldap_memfree( matched );
1136                         matched_ctx = op->o_tmpmemctx;
1137                         matched = pdn.bv_val;
1138                 }
1139                 rs->sr_matched = matched;
1140         }
1141
1142         if ( op->o_conn &&
1143                 ( ( sendok & LDAP_BACK_SENDOK )
1144                         || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1145         {
1146                 send_ldap_result( op, rs );
1147         }
1148         if ( matched ) {
1149                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1150         }
1151         if ( text ) {
1152                 ldap_memfree( text );
1153         }
1154         if ( rs->sr_ref ) {
1155                 assert( refs != NULL );
1156                 ber_memvfree( (void **)refs );
1157                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1158         }
1159         if ( ctrls ) {
1160                 assert( rs->sr_ctrls != NULL );
1161                 ldap_controls_free( ctrls );
1162         }
1163
1164         rs->sr_text = save_text;
1165         rs->sr_matched = save_matched;
1166         rs->sr_ref = save_ref;
1167         rs->sr_ctrls = save_ctrls;
1168
1169         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1170 }
1171
1172 /*
1173  * meta_back_proxy_authz_cred()
1174  *
1175  * prepares credentials & method for meta_back_proxy_authz_bind();
1176  * or, if method is SASL, performs the SASL bind directly.
1177  */
1178 int
1179 meta_back_proxy_authz_cred(
1180         metaconn_t              *mc,
1181         int                     candidate,
1182         Operation               *op,
1183         SlapReply               *rs,
1184         ldap_back_send_t        sendok,
1185         struct berval           *binddn,
1186         struct berval           *bindcred,
1187         int                     *method )
1188 {
1189         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1190         metatarget_t            *mt = mi->mi_targets[ candidate ];
1191         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1192         struct berval           ndn;
1193         int                     dobind = 0;
1194
1195         /* don't proxyAuthz if protocol is not LDAPv3 */
1196         switch ( mt->mt_version ) {
1197         case LDAP_VERSION3:
1198                 break;
1199
1200         case 0:
1201                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1202                         break;
1203                 }
1204                 /* fall thru */
1205
1206         default:
1207                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1208                 if ( sendok & LDAP_BACK_SENDERR ) {
1209                         send_ldap_result( op, rs );
1210                 }
1211                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1212                 goto done;
1213         }
1214
1215         if ( op->o_tag == LDAP_REQ_BIND ) {
1216                 ndn = op->o_req_ndn;
1217
1218         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1219                 ndn = op->o_conn->c_ndn;
1220
1221         } else {
1222                 ndn = op->o_ndn;
1223         }
1224
1225         /*
1226          * FIXME: we need to let clients use proxyAuthz
1227          * otherwise we cannot do symmetric pools of servers;
1228          * we have to live with the fact that a user can
1229          * authorize itself as any ID that is allowed
1230          * by the authzTo directive of the "proxyauthzdn".
1231          */
1232         /*
1233          * NOTE: current Proxy Authorization specification
1234          * and implementation do not allow proxy authorization
1235          * control to be provided with Bind requests
1236          */
1237         /*
1238          * if no bind took place yet, but the connection is bound
1239          * and the "proxyauthzdn" is set, then bind as
1240          * "proxyauthzdn" and explicitly add the proxyAuthz
1241          * control to every operation with the dn bound
1242          * to the connection as control value.
1243          */
1244
1245         /* bind as proxyauthzdn only if no idassert mode
1246          * is requested, or if the client's identity
1247          * is authorized */
1248         switch ( mt->mt_idassert_mode ) {
1249         case LDAP_BACK_IDASSERT_LEGACY:
1250                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1251                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1252                         {
1253                                 *binddn = mt->mt_idassert_authcDN;
1254                                 *bindcred = mt->mt_idassert_passwd;
1255                                 dobind = 1;
1256                         }
1257                 }
1258                 break;
1259
1260         default:
1261                 /* NOTE: rootdn can always idassert */
1262                 if ( BER_BVISNULL( &ndn ) && mt->mt_idassert_authz == NULL ) {
1263                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1264                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1265                                 if ( sendok & LDAP_BACK_SENDERR ) {
1266                                         send_ldap_result( op, rs );
1267                                 }
1268                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1269
1270                         } else {
1271                                 rs->sr_err = LDAP_SUCCESS;
1272                                 *binddn = slap_empty_bv;
1273                                 *bindcred = slap_empty_bv;
1274                                 break;
1275                         }
1276
1277                         goto done;
1278
1279                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1280                         struct berval authcDN;
1281
1282                         if ( BER_BVISNULL( &ndn ) ) {
1283                                 authcDN = slap_empty_bv;
1284
1285                         } else {
1286                                 authcDN = ndn;
1287                         }
1288                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1289                                         &authcDN, &authcDN );
1290                         if ( rs->sr_err != LDAP_SUCCESS ) {
1291                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1292                                         if ( sendok & LDAP_BACK_SENDERR ) {
1293                                                 send_ldap_result( op, rs );
1294                                         }
1295                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1296
1297                                 } else {
1298                                         rs->sr_err = LDAP_SUCCESS;
1299                                         *binddn = slap_empty_bv;
1300                                         *bindcred = slap_empty_bv;
1301                                         break;
1302                                 }
1303
1304                                 goto done;
1305                         }
1306                 }
1307
1308                 *binddn = mt->mt_idassert_authcDN;
1309                 *bindcred = mt->mt_idassert_passwd;
1310                 dobind = 1;
1311                 break;
1312         }
1313
1314         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1315 #ifdef HAVE_CYRUS_SASL
1316                 void            *defaults = NULL;
1317                 struct berval   authzID = BER_BVNULL;
1318                 int             freeauthz = 0;
1319
1320                 /* if SASL supports native authz, prepare for it */
1321                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1322                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1323                 {
1324                         switch ( mt->mt_idassert_mode ) {
1325                         case LDAP_BACK_IDASSERT_OTHERID:
1326                         case LDAP_BACK_IDASSERT_OTHERDN:
1327                                 authzID = mt->mt_idassert_authzID;
1328                                 break;
1329
1330                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1331                                 BER_BVSTR( &authzID, "dn:" );
1332                                 break;
1333
1334                         case LDAP_BACK_IDASSERT_SELF:
1335                                 if ( BER_BVISNULL( &ndn ) ) {
1336                                         /* connection is not authc'd, so don't idassert */
1337                                         BER_BVSTR( &authzID, "dn:" );
1338                                         break;
1339                                 }
1340                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1341                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1342                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1343                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1344                                                 ndn.bv_val, ndn.bv_len + 1 );
1345                                 freeauthz = 1;
1346                                 break;
1347
1348                         default:
1349                                 break;
1350                         }
1351                 }
1352
1353                 if ( mt->mt_idassert_secprops != NULL ) {
1354                         rs->sr_err = ldap_set_option( msc->msc_ld,
1355                                 LDAP_OPT_X_SASL_SECPROPS,
1356                                 (void *)mt->mt_idassert_secprops );
1357
1358                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1359                                 rs->sr_err = LDAP_OTHER;
1360                                 if ( sendok & LDAP_BACK_SENDERR ) {
1361                                         send_ldap_result( op, rs );
1362                                 }
1363                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1364                                 goto done;
1365                         }
1366                 }
1367
1368                 defaults = lutil_sasl_defaults( msc->msc_ld,
1369                                 mt->mt_idassert_sasl_mech.bv_val,
1370                                 mt->mt_idassert_sasl_realm.bv_val,
1371                                 mt->mt_idassert_authcID.bv_val,
1372                                 mt->mt_idassert_passwd.bv_val,
1373                                 authzID.bv_val );
1374
1375                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1376                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1377                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1378                                 defaults );
1379
1380                 rs->sr_err = slap_map_api2result( rs );
1381                 if ( rs->sr_err != LDAP_SUCCESS ) {
1382                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1383                         if ( sendok & LDAP_BACK_SENDERR ) {
1384                                 send_ldap_result( op, rs );
1385                         }
1386
1387                 } else {
1388                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1389                 }
1390
1391                 lutil_sasl_freedefs( defaults );
1392                 if ( freeauthz ) {
1393                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1394                 }
1395
1396                 goto done;
1397 #endif /* HAVE_CYRUS_SASL */
1398         }
1399
1400         *method = mt->mt_idassert_authmethod;
1401         switch ( mt->mt_idassert_authmethod ) {
1402         case LDAP_AUTH_NONE:
1403                 BER_BVSTR( binddn, "" );
1404                 BER_BVSTR( bindcred, "" );
1405                 /* fallthru */
1406
1407         case LDAP_AUTH_SIMPLE:
1408                 break;
1409
1410         default:
1411                 /* unsupported! */
1412                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1413                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1414                 if ( sendok & LDAP_BACK_SENDERR ) {
1415                         send_ldap_result( op, rs );
1416                 }
1417                 break;
1418         }
1419
1420 done:;
1421         return rs->sr_err;
1422 }
1423
1424 static int
1425 meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1426 {
1427         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1428         metatarget_t            *mt = mi->mi_targets[ candidate ];
1429         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1430         struct berval           binddn = BER_BVC( "" ),
1431                                 cred = BER_BVC( "" );
1432         int                     method = LDAP_AUTH_NONE,
1433                                 rc;
1434
1435         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1436         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1437                 int     msgid;
1438
1439                 switch ( method ) {
1440                 case LDAP_AUTH_NONE:
1441                 case LDAP_AUTH_SIMPLE:
1442                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1443                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1444                                         &cred, NULL, NULL, &msgid );
1445                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
1446                         if ( rc == LDAP_SUCCESS ) {
1447                                 /* set rebind stuff in case of successful proxyAuthz bind,
1448                                  * so that referral chasing is attempted using the right
1449                                  * identity */
1450                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1451                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1452
1453                                 if ( LDAP_BACK_SAVECRED( mi ) ) {
1454                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1455                                                 memset( msc->msc_cred.bv_val, 0,
1456                                                         msc->msc_cred.bv_len );
1457                                         }
1458                                         ber_bvreplace( &msc->msc_cred, &cred );
1459                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1460                                 }
1461                         }
1462                         break;
1463
1464                 default:
1465                         assert( 0 );
1466                         break;
1467                 }
1468         }
1469
1470         return LDAP_BACK_CONN_ISBOUND( msc );
1471 }