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 #if META_BACK_PRINT_CONNTREE > 0
 223                         meta_back_print_conntree( mi->mi_conninfo.lai_tree, ">>> meta_back_bind" );
 224 #endif /* META_BACK_PRINT_CONNTREE */
 225                         tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 226                                 meta_back_conndn_cmp );
 227                         assert( tmpmc == mc );
 228
 229                         /* delete all cached connections with the current connection */
 230                         if ( LDAP_BACK_SINGLECONN( mi ) ) {
 231                                 while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
 232                                 {
 233                                         Debug( LDAP_DEBUG_TRACE,
 234                                                 "=>meta_back_bind: destroying conn %ld (refcnt=%u)\n",
 235                                                 LDAP_BACK_PCONN_ID( mc ), mc->mc_refcnt, 0 );
 236
 237                                         if ( tmpmc->mc_refcnt != 0 ) {
 238                                                 /* taint it */
 239                                                 LDAP_BACK_CONN_TAINTED_SET( tmpmc );
 240
 241                                         } else {
 242                                                 /*
 243                                                  * Needs a test because the handler may be corrupted,
 244                                                  * and calling ldap_unbind on a corrupted header results
 245                                                  * in a segmentation fault
 246                                                  */
 247                                                 meta_back_conn_free( tmpmc );
 248                                         }
 249                                 }
 250                         }
 251
 252                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 253                         if ( isroot ) {
 254                                 mc->mc_conn = LDAP_BACK_PCONN_SET( op );
 255                         }
 256                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 257                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 258 #if META_BACK_PRINT_CONNTREE > 0
 259                         meta_back_print_conntree( mi->mi_conninfo.lai_tree, "<<< meta_back_bind" );
 260 #endif /* META_BACK_PRINT_CONNTREE */
 261                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 262                         if ( lerr == -1 ) {
 263                                 meta_clear_candidates( op, mc );
 264
 265                                 /* we can do this because mc_refcnt == 1 */
 266                                 mc->mc_refcnt = 0;
 267                                 meta_back_conn_free( mc );
 268                                 mc = NULL;
 269                         }
 270                 }
 271         }
 272
 273         if ( mc != NULL ) {
 274                 meta_back_release_conn( op, mc );
 275         }
 276
 277         /*
 278          * rc is LDAP_SUCCESS if at least one bind succeeded,
 279          * err is the last error that occurred during a bind;
 280          * if at least (and at most?) one bind succeeds, fine.
 281          */
 282         if ( rc != LDAP_SUCCESS ) {
 283
 284                 /*
 285                  * deal with bind failure ...
 286                  */
 287
 288                 /*
 289                  * no target was found within the naming context,
 290                  * so bind must fail with invalid credentials
 291                  */
 292                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 293                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 294                 } else {
 295                         rs->sr_err = slap_map_api2result( rs );
 296                 }
 297                 send_ldap_result( op, rs );
 298                 return rs->sr_err;
 299
 300         }
 301
 302         return LDAP_SUCCESS;
 303 }
 304
 305 static int
 306 meta_back_bind_op_result(
 307         Operation               *op,
 308         SlapReply               *rs,
 309         metaconn_t              *mc,
 310         int                     candidate,
 311         int                     msgid,
 312         ldap_back_send_t        sendok )
 313 {
 314         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 315         metatarget_t            *mt = mi->mi_targets[ candidate ];
 316         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 317         LDAPMessage             *res;
 318         struct timeval          tv;
 319         int                     rc;
 320         int                     nretries = mt->mt_nretries;
 321         char                    buf[ SLAP_TEXT_BUFLEN ];
 322
 323         Debug( LDAP_DEBUG_TRACE,
 324                 ">>> %s meta_back_bind_op_result[%d]\n",
 325                 op->o_log_prefix, candidate, 0 );
 326
 327         if ( rs->sr_err == LDAP_SUCCESS ) {
 328                 time_t          stoptime = (time_t)(-1),
 329                                 timeout;
 330                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 331                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 332                 const char      *timeout_text = "Operation timed out";
 333                 slap_op_t       opidx = slap_req2op( op->o_tag );
 334
 335                 /* since timeout is not specified, compute and use
 336                  * the one specific to the ongoing operation */
 337                 if ( opidx == LDAP_REQ_SEARCH ) {
 338                         if ( op->ors_tlimit <= 0 ) {
 339                                 timeout = 0;
 340
 341                         } else {
 342                                 timeout = op->ors_tlimit;
 343                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 344                                 timeout_text = NULL;
 345                         }
 346
 347                 } else {
 348                         timeout = mt->mt_timeout[ opidx ];
 349                 }
 350
 351                 /* better than nothing :) */
 352                 if ( timeout == 0 ) {
 353                         if ( mi->mi_idle_timeout ) {
 354                                 timeout = mi->mi_idle_timeout;
 355
 356                         } else if ( mi->mi_conn_ttl ) {
 357                                 timeout = mi->mi_conn_ttl;
 358                         }
 359                 }
 360
 361                 if ( timeout ) {
 362                         stoptime = op->o_time + timeout;
 363                 }
 364
 365                 LDAP_BACK_TV_SET( &tv );
 366
 367                 /*
 368                  * handle response!!!
 369                  */
 370 retry:;
 371                 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 372                 switch ( rc ) {
 373                 case 0:
 374 #if 0
 375                         Debug( LDAP_DEBUG_ANY,
 376                                 "%s meta_back_bind_op_result[%d]: ldap_result=0 nretries=%d.\n",
 377                                 op->o_log_prefix, candidate, nretries );
 378 #endif
 379
 380                         if ( nretries != META_RETRY_NEVER
 381                                 || ( timeout && slap_get_time() <= stoptime ) )
 382                         {
 383                                 ldap_pvt_thread_yield();
 384                                 if ( nretries > 0 ) {
 385                                         nretries--;
 386                                 }
 387                                 tv = mt->mt_bind_timeout;
 388                                 goto retry;
 389                         }
 390
 391                         /* don't let anyone else use this handler,
 392                          * because there's a pending bind that will not
 393                          * be acknowledged */
 394                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 395                         ldap_unbind_ext( msc->msc_ld, NULL, NULL );
 396                         msc->msc_ld = NULL;
 397                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 398                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 399
 400                         rs->sr_err = timeout_err;
 401                         rs->sr_text = timeout_text;
 402                         break;
 403
 404                 case -1:
 405                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
 406                                 &rs->sr_err );
 407
 408                         snprintf( buf, sizeof( buf ),
 409                                 "err=%d (%s) nretries=%d",
 410                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 411                         Debug( LDAP_DEBUG_ANY,
 412                                 "### %s meta_back_bind_op_result[%d]: %s.\n",
 413                                 op->o_log_prefix, candidate, buf );
 414                         break;
 415
 416                 default:
 417                         /* only touch when activity actually took place... */
 418                         if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 419                                 msc->msc_time = op->o_time;
 420                         }
 421
 422                         /* FIXME: matched? referrals? response controls? */
 423                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 424                                         NULL, NULL, NULL, NULL, 1 );
 425                         if ( rc != LDAP_SUCCESS ) {
 426                                 rs->sr_err = rc;
 427                         }
 428                         break;
 429                 }
 430         }
 431
 432         rs->sr_err = slap_map_api2result( rs );
 433
 434         Debug( LDAP_DEBUG_TRACE,
 435                 "<<< %s meta_back_bind_op_result[%d] err=%d\n",
 436                 op->o_log_prefix, candidate, rs->sr_err );
 437
 438         return rs->sr_err;
 439 }
 440
 441 /*
 442  * meta_back_single_bind
 443  *
 444  * attempts to perform a bind with creds
 445  */
 446 static int
 447 meta_back_single_bind(
 448         Operation               *op,
 449         SlapReply               *rs,
 450         metaconn_t              *mc,
 451         int                     candidate )
 452 {
 453         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 454         metatarget_t            *mt = mi->mi_targets[ candidate ];
 455         struct berval           mdn = BER_BVNULL;
 456         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 457         int                     msgid;
 458         dncookie                dc;
 459
 460         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 461                 ch_free( msc->msc_bound_ndn.bv_val );
 462                 BER_BVZERO( &msc->msc_bound_ndn );
 463         }
 464
 465         if ( LDAP_BACK_SAVECRED( mi ) && !BER_BVISNULL( &msc->msc_cred ) ) {
 466                 /* destroy sensitive data */
 467                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 468                 ch_free( msc->msc_cred.bv_val );
 469                 BER_BVZERO( &msc->msc_cred );
 470         }
 471
 472         /*
 473          * Rewrite the bind dn if needed
 474          */
 475         dc.target = mt;
 476         dc.conn = op->o_conn;
 477         dc.rs = rs;
 478         dc.ctx = "bindDN";
 479
 480         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 481                 rs->sr_text = "DN rewrite error";
 482                 rs->sr_err = LDAP_OTHER;
 483                 return rs->sr_err;
 484         }
 485
 486         /* FIXME: this fixes the bind problem right now; we need
 487          * to use the asynchronous version to get the "matched"
 488          * and more in case of failure ... */
 489         /* FIXME: should we check if at least some of the op->o_ctrls
 490          * can/should be passed? */
 491         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 492                         LDAP_SASL_SIMPLE, &op->orb_cred,
 493                         op->o_ctrls, NULL, &msgid );
 494         meta_back_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND );
 495         if ( rs->sr_err != LDAP_SUCCESS ) {
 496                 goto return_results;
 497         }
 498
 499         /* If defined, proxyAuthz will be used also when
 500          * back-ldap is the authorizing backend; for this
 501          * purpose, a successful bind is followed by a
 502          * bind with the configured identity assertion */
 503         /* NOTE: use with care */
 504         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 505                 meta_back_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR );
 506                 if ( !LDAP_BACK_CONN_ISBOUND( msc ) ) {
 507                         goto return_results;
 508                 }
 509                 goto cache_refresh;
 510         }
 511
 512         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_ndn );
 513         LDAP_BACK_CONN_ISBOUND_SET( msc );
 514         mc->mc_authz_target = candidate;
 515
 516         if ( LDAP_BACK_SAVECRED( mi ) ) {
 517                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 518                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 519         }
 520
 521 cache_refresh:;
 522         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 523                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 524         {
 525                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 526                                 &op->o_req_ndn, candidate );
 527         }
 528
 529 return_results:;
 530         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 531                 free( mdn.bv_val );
 532         }
 533
 534         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 535                 meta_back_quarantine( op, rs, candidate );
 536         }
 537
 538         return rs->sr_err;
 539 }
 540
 541 /*
 542  * meta_back_single_dobind
 543  */
 544 int
 545 meta_back_single_dobind(
 546         Operation               *op,
 547         SlapReply               *rs,
 548         metaconn_t              **mcp,
 549         int                     candidate,
 550         ldap_back_send_t        sendok,
 551         int                     nretries,
 552         int                     dolock )
 553 {
 554         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 555         metatarget_t            *mt = mi->mi_targets[ candidate ];
 556         metaconn_t              *mc = *mcp;
 557         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 558         int                     rc;
 559         static struct berval    cred = BER_BVC( "" );
 560         int                     msgid;
 561
 562         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 563
 564         /* NOTE: this obsoletes pseudorootdn */
 565         if ( op->o_conn != NULL &&
 566                 !op->o_do_not_cache &&
 567                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 568                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 569                         ( LDAP_BACK_CONN_ISPRIV( msc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
 570                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 571         {
 572                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
 573                 rc = rs->sr_err;
 574                 goto done;
 575         }
 576
 577         /* FIXME: should we check if at least some of the op->o_ctrls
 578          * can/should be passed? */
 579         rs->sr_err = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 580                         NULL, NULL, &msgid );
 581         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
 582
 583 done:;
 584         rs->sr_err = rc;
 585         if ( rc != LDAP_SUCCESS ) {
 586                 if ( dolock ) {
 587                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 588                 }
 589                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 590                 if ( META_BACK_ONERR_STOP( mi ) ) {
 591                         LDAP_BACK_CONN_TAINTED_SET( mc );
 592                         meta_back_release_conn_lock( op, mc, 0 );
 593                         *mcp = NULL;
 594                 }
 595                 if ( dolock ) {
 596                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 597                 }
 598
 599                 if ( META_BACK_ONERR_STOP( mi ) && ( sendok & LDAP_BACK_SENDERR ) ) {
 600                         send_ldap_result( op, rs );
 601                 }
 602         }
 603
 604         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 605                 meta_back_quarantine( op, rs, candidate );
 606         }
 607
 608         return rc;
 609 }
 610
 611 /*
 612  * meta_back_dobind
 613  */
 614 int
 615 meta_back_dobind(
 616         Operation               *op,
 617         SlapReply               *rs,
 618         metaconn_t              *mc,
 619         ldap_back_send_t        sendok )
 620 {
 621         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 622
 623         int                     bound = 0,
 624                                 i,
 625                                 isroot = 0;
 626
 627         SlapReply               *candidates = meta_back_candidates_get( op );
 628
 629         if ( be_isroot( op ) ) {
 630                 isroot = 1;
 631         }
 632
 633         Debug( LDAP_DEBUG_TRACE,
 634                 "%s meta_back_dobind: conn=%ld%s\n",
 635                 op->o_log_prefix,
 636                 LDAP_BACK_PCONN_ID( mc ),
 637                 isroot ? " (isroot)" : "" );
 638
 639         /*
 640          * all the targets are bound as pseudoroot
 641          */
 642         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 643                 bound = 1;
 644                 goto done;
 645         }
 646
 647         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 648                 metatarget_t            *mt = mi->mi_targets[ i ];
 649                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 650                 int                     rc;
 651
 652                 /*
 653                  * Not a candidate
 654                  */
 655                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 656                         continue;
 657                 }
 658
 659                 assert( msc->msc_ld != NULL );
 660
 661                 /*
 662                  * If the target is already bound it is skipped
 663                  */
 664
 665 retry_binding:;
 666                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 667                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 668                         || ( LDAP_BACK_CONN_ISANON( msc )
 669                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 670                 {
 671                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 672                         ++bound;
 673                         continue;
 674
 675                 } else if ( LDAP_BACK_CONN_BINDING( msc ) ) {
 676                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 677                         ldap_pvt_thread_yield();
 678                         goto retry_binding;
 679
 680                 }
 681
 682                 LDAP_BACK_CONN_BINDING_SET( msc );
 683                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 684
 685                 rc = meta_back_single_dobind( op, rs, &mc, i,
 686                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 687                 /*
 688                  * NOTE: meta_back_single_dobind() already retries;
 689                  * in case of failure, it resets mc...
 690                  */
 691                 if ( rc != LDAP_SUCCESS ) {
 692                         char            buf[ SLAP_TEXT_BUFLEN ];
 693
 694                         if ( mc == NULL ) {
 695                                 /* meta_back_single_dobind() already sent
 696                                  * response and released connection */
 697                                 goto send_err;
 698                         }
 699
 700
 701                         if ( rc == LDAP_UNAVAILABLE ) {
 702                                 /* FIXME: meta_back_retry() already calls
 703                                  * meta_back_single_dobind() */
 704                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 705                                         goto retry_ok;
 706                                 }
 707
 708                                 if ( mc != NULL ) {
 709                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 710                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 711                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 712                                 }
 713
 714                                 return 0;
 715                         }
 716
 717                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 718                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 719                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 720
 721                         snprintf( buf, sizeof( buf ),
 722                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 723                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 724                                 rc, ldap_err2string( rc ) );
 725                         Debug( LDAP_DEBUG_ANY,
 726                                 "%s %s\n",
 727                                 op->o_log_prefix, buf, 0 );
 728
 729                         /*
 730                          * null cred bind should always succeed
 731                          * as anonymous, so a failure means
 732                          * the target is no longer candidate possibly
 733                          * due to technical reasons (remote host down?)
 734                          * so better clear the handle
 735                          */
 736                         /* leave the target candidate, but record the error for later use */
 737                         candidates[ i ].sr_err = rc;
 738                         if ( META_BACK_ONERR_STOP( mi ) ) {
 739                                 bound = 0;
 740                                 goto done;
 741                         }
 742
 743                         continue;
 744                 } /* else */
 745
 746 retry_ok:;
 747                 Debug( LDAP_DEBUG_TRACE,
 748                         "%s meta_back_dobind[%d]: "
 749                         "(%s)\n",
 750                         op->o_log_prefix, i,
 751                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 752
 753                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 754                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 755                 if ( isroot ) {
 756                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 757                 } else {
 758                         LDAP_BACK_CONN_ISANON_SET( msc );
 759                 }
 760                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 761                 ++bound;
 762         }
 763
 764 done:;
 765         Debug( LDAP_DEBUG_TRACE,
 766                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 767                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc ), bound );
 768
 769         if ( bound == 0 ) {
 770                 meta_back_release_conn( op, mc );
 771
 772 send_err:;
 773                 if ( sendok & LDAP_BACK_SENDERR ) {
 774                         if ( rs->sr_err == LDAP_SUCCESS ) {
 775                                 rs->sr_err = LDAP_BUSY;
 776                         }
 777                         send_ldap_result( op, rs );
 778                 }
 779
 780                 return 0;
 781         }
 782
 783         return ( bound > 0 );
 784 }
 785
 786 /*
 787  * meta_back_default_rebind
 788  *
 789  * This is a callback used for chasing referrals using the same
 790  * credentials as the original user on this session.
 791  */
 792 int
 793 meta_back_default_rebind(
 794         LDAP                    *ld,
 795         LDAP_CONST char         *url,
 796         ber_tag_t               request,
 797         ber_int_t               msgid,
 798         void                    *params )
 799 {
 800         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 801
 802         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 803                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 804                         NULL, NULL, NULL );
 805 }
 806
 807 /*
 808  * meta_back_default_urllist
 809  *
 810  * This is a callback used for mucking with the urllist
 811  */
 812 int
 813 meta_back_default_urllist(
 814         LDAP            *ld,
 815         LDAPURLDesc     **urllist,
 816         LDAPURLDesc     **url,
 817         void            *params )
 818 {
 819         metatarget_t    *mt = (metatarget_t *)params;
 820         LDAPURLDesc     **urltail;
 821
 822         if ( urllist == url ) {
 823                 return LDAP_SUCCESS;
 824         }
 825
 826         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 827                 /* count */ ;
 828
 829         *urltail = *urllist;
 830         *urllist = *url;
 831         *url = NULL;
 832
 833         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 834         if ( mt->mt_uri ) {
 835                 ch_free( mt->mt_uri );
 836         }
 837
 838         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 839         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 840
 841         return LDAP_SUCCESS;
 842 }
 843
 844 int
 845 meta_back_cancel(
 846         metaconn_t              *mc,
 847         Operation               *op,
 848         SlapReply               *rs,
 849         ber_int_t               msgid,
 850         int                     candidate,
 851         ldap_back_send_t        sendok )
 852 {
 853         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 854
 855         metatarget_t            *mt = mi->mi_targets[ candidate ];
 856         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 857
 858         int                     rc = LDAP_OTHER;
 859
 860         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 861                 op->o_log_prefix, candidate, msgid );
 862
 863         /* default behavior */
 864         if ( META_BACK_TGT_ABANDON( mt ) ) {
 865                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 866
 867         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 868                 rc = ldap_int_discard( msc->msc_ld, msgid );
 869
 870         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 871                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 872
 873         } else {
 874                 assert( 0 );
 875         }
 876
 877         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 878                 op->o_log_prefix, candidate, rc );
 879
 880         return rc;
 881 }
 882
 883
 884
 885 /*
 886  * FIXME: error return must be handled in a cleaner way ...
 887  */
 888 int
 889 meta_back_op_result(
 890         metaconn_t              *mc,
 891         Operation               *op,
 892         SlapReply               *rs,
 893         int                     candidate,
 894         ber_int_t               msgid,
 895         time_t                  timeout,
 896         ldap_back_send_t        sendok )
 897 {
 898         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 899
 900         const char      *save_text = rs->sr_text,
 901                         *save_matched = rs->sr_matched;
 902         BerVarray       save_ref = rs->sr_ref;
 903         LDAPControl     **save_ctrls = rs->sr_ctrls;
 904         void            *matched_ctx = NULL;
 905
 906         char            *matched = NULL;
 907         char            *text = NULL;
 908         char            **refs = NULL;
 909         LDAPControl     **ctrls = NULL;
 910
 911         assert( mc != NULL );
 912
 913         rs->sr_text = NULL;
 914         rs->sr_matched = NULL;
 915         rs->sr_ref = NULL;
 916         rs->sr_ctrls = NULL;
 917
 918         if ( candidate != META_TARGET_NONE ) {
 919                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 920                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 921
 922 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
 923
 924                 if ( ERR_OK( rs->sr_err ) ) {
 925                         int             rc;
 926                         struct timeval  tv;
 927                         LDAPMessage     *res = NULL;
 928                         time_t          stoptime = (time_t)(-1);
 929                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 930                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 931                         const char      *timeout_text = "Operation timed out";
 932
 933                         /* if timeout is not specified, compute and use
 934                          * the one specific to the ongoing operation */
 935                         if ( timeout == (time_t)(-1) ) {
 936                                 slap_op_t       opidx = slap_req2op( op->o_tag );
 937
 938                                 if ( opidx == SLAP_OP_SEARCH ) {
 939                                         if ( op->ors_tlimit <= 0 ) {
 940                                                 timeout = 0;
 941
 942                                         } else {
 943                                                 timeout = op->ors_tlimit;
 944                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 945                                                 timeout_text = NULL;
 946                                         }
 947
 948                                 } else {
 949                                         timeout = mt->mt_timeout[ opidx ];
 950                                 }
 951                         }
 952
 953                         /* better than nothing :) */
 954                         if ( timeout == 0 ) {
 955                                 if ( mi->mi_idle_timeout ) {
 956                                         timeout = mi->mi_idle_timeout;
 957
 958                                 } else if ( mi->mi_conn_ttl ) {
 959                                         timeout = mi->mi_conn_ttl;
 960                                 }
 961                         }
 962
 963                         if ( timeout ) {
 964                                 stoptime = op->o_time + timeout;
 965                         }
 966
 967                         LDAP_BACK_TV_SET( &tv );
 968
 969 retry:;
 970                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 971                         switch ( rc ) {
 972                         case 0:
 973                                 if ( timeout && slap_get_time() > stoptime ) {
 974                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
 975                                         rs->sr_err = timeout_err;
 976                                         rs->sr_text = timeout_text;
 977                                         break;
 978                                 }
 979
 980                                 LDAP_BACK_TV_SET( &tv );
 981                                 ldap_pvt_thread_yield();
 982                                 goto retry;
 983
 984                         case -1:
 985                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
 986                                                 &rs->sr_err );
 987                                 break;
 988
 989
 990                         /* otherwise get the result; if it is not
 991                          * LDAP_SUCCESS, record it in the reply
 992                          * structure (this includes
 993                          * LDAP_COMPARE_{TRUE|FALSE}) */
 994                         default:
 995                                 /* only touch when activity actually took place... */
 996                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 997                                         msc->msc_time = op->o_time;
 998                                 }
 999
1000                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
1001                                                 &matched, &text, &refs, &ctrls, 1 );
1002                                 res = NULL;
1003                                 rs->sr_text = text;
1004                                 if ( rc != LDAP_SUCCESS ) {
1005                                         rs->sr_err = rc;
1006                                 }
1007                                 if ( refs != NULL ) {
1008                                         int     i;
1009
1010                                         for ( i = 0; refs[ i ] != NULL; i++ )
1011                                                 /* count */ ;
1012                                         rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1013                                                 op->o_tmpmemctx );
1014                                         for ( i = 0; refs[ i ] != NULL; i++ ) {
1015                                                 ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1016                                         }
1017                                         BER_BVZERO( &rs->sr_ref[ i ] );
1018                                 }
1019                                 if ( ctrls != NULL ) {
1020                                         rs->sr_ctrls = ctrls;
1021                                 }
1022                         }
1023
1024                         assert( res == NULL );
1025                 }
1026
1027                 /* if the error in the reply structure is not
1028                  * LDAP_SUCCESS, try to map it from client
1029                  * to server error */
1030                 if ( !ERR_OK( rs->sr_err ) ) {
1031                         rs->sr_err = slap_map_api2result( rs );
1032
1033                         /* internal ops ( op->o_conn == NULL )
1034                          * must not reply to client */
1035                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1036
1037                                 /* record the (massaged) matched
1038                                  * DN into the reply structure */
1039                                 rs->sr_matched = matched;
1040                         }
1041                 }
1042
1043                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1044                         meta_back_quarantine( op, rs, candidate );
1045                 }
1046
1047         } else {
1048                 int     i,
1049                         err = rs->sr_err;
1050
1051                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1052                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1053                         char                    *xtext = NULL;
1054                         char                    *xmatched = NULL;
1055
1056                         rs->sr_err = LDAP_SUCCESS;
1057
1058                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rs->sr_err );
1059                         if ( rs->sr_err != LDAP_SUCCESS ) {
1060                                 /*
1061                                  * better check the type of error. In some cases
1062                                  * (search ?) it might be better to return a
1063                                  * success if at least one of the targets gave
1064                                  * positive result ...
1065                                  */
1066                                 ldap_get_option( msc->msc_ld,
1067                                                 LDAP_OPT_DIAGNOSTIC_MESSAGE, &xtext );
1068                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1069                                         ldap_memfree( xtext );
1070                                         xtext = NULL;
1071                                 }
1072
1073                                 ldap_get_option( msc->msc_ld,
1074                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1075                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1076                                         ldap_memfree( xmatched );
1077                                         xmatched = NULL;
1078                                 }
1079
1080                                 rs->sr_err = slap_map_api2result( rs );
1081
1082                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1083                                         char    buf[ SLAP_TEXT_BUFLEN ];
1084
1085                                         snprintf( buf, sizeof( buf ),
1086                                                 "meta_back_op_result[%d] "
1087                                                 "err=%d text=\"%s\" matched=\"%s\"",
1088                                                 i, rs->sr_err,
1089                                                 ( xtext ? xtext : "" ),
1090                                                 ( xmatched ? xmatched : "" ) );
1091                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1092                                                 op->o_log_prefix, buf, 0 );
1093                                 }
1094
1095                                 /*
1096                                  * FIXME: need to rewrite "match" (need rwinfo)
1097                                  */
1098                                 switch ( rs->sr_err ) {
1099                                 default:
1100                                         err = rs->sr_err;
1101                                         if ( xtext != NULL ) {
1102                                                 if ( text ) {
1103                                                         ldap_memfree( text );
1104                                                 }
1105                                                 text = xtext;
1106                                                 xtext = NULL;
1107                                         }
1108                                         if ( xmatched != NULL ) {
1109                                                 if ( matched ) {
1110                                                         ldap_memfree( matched );
1111                                                 }
1112                                                 matched = xmatched;
1113                                                 xmatched = NULL;
1114                                         }
1115                                         break;
1116                                 }
1117
1118                                 if ( xtext ) {
1119                                         ldap_memfree( xtext );
1120                                 }
1121
1122                                 if ( xmatched ) {
1123                                         ldap_memfree( xmatched );
1124                                 }
1125                         }
1126
1127                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1128                                 meta_back_quarantine( op, rs, i );
1129                         }
1130                 }
1131
1132                 if ( err != LDAP_SUCCESS ) {
1133                         rs->sr_err = err;
1134                 }
1135         }
1136
1137         if ( matched != NULL ) {
1138                 struct berval   dn, pdn;
1139
1140                 ber_str2bv( matched, 0, 0, &dn );
1141                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1142                         ldap_memfree( matched );
1143                         matched_ctx = op->o_tmpmemctx;
1144                         matched = pdn.bv_val;
1145                 }
1146                 rs->sr_matched = matched;
1147         }
1148
1149         if ( op->o_conn &&
1150                 ( ( sendok & LDAP_BACK_SENDOK )
1151                         || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1152         {
1153                 send_ldap_result( op, rs );
1154         }
1155         if ( matched ) {
1156                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1157         }
1158         if ( text ) {
1159                 ldap_memfree( text );
1160         }
1161         if ( rs->sr_ref ) {
1162                 assert( refs != NULL );
1163                 ber_memvfree( (void **)refs );
1164                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1165         }
1166         if ( ctrls ) {
1167                 assert( rs->sr_ctrls != NULL );
1168                 ldap_controls_free( ctrls );
1169         }
1170
1171         rs->sr_text = save_text;
1172         rs->sr_matched = save_matched;
1173         rs->sr_ref = save_ref;
1174         rs->sr_ctrls = save_ctrls;
1175
1176         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1177 }
1178
1179 /*
1180  * meta_back_proxy_authz_cred()
1181  *
1182  * prepares credentials & method for meta_back_proxy_authz_bind();
1183  * or, if method is SASL, performs the SASL bind directly.
1184  */
1185 int
1186 meta_back_proxy_authz_cred(
1187         metaconn_t              *mc,
1188         int                     candidate,
1189         Operation               *op,
1190         SlapReply               *rs,
1191         ldap_back_send_t        sendok,
1192         struct berval           *binddn,
1193         struct berval           *bindcred,
1194         int                     *method )
1195 {
1196         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1197         metatarget_t            *mt = mi->mi_targets[ candidate ];
1198         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1199         struct berval           ndn;
1200         int                     dobind = 0;
1201
1202         /* don't proxyAuthz if protocol is not LDAPv3 */
1203         switch ( mt->mt_version ) {
1204         case LDAP_VERSION3:
1205                 break;
1206
1207         case 0:
1208                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1209                         break;
1210                 }
1211                 /* fall thru */
1212
1213         default:
1214                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1215                 if ( sendok & LDAP_BACK_SENDERR ) {
1216                         send_ldap_result( op, rs );
1217                 }
1218                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1219                 goto done;
1220         }
1221
1222         if ( op->o_tag == LDAP_REQ_BIND ) {
1223                 ndn = op->o_req_ndn;
1224
1225         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1226                 ndn = op->o_conn->c_ndn;
1227
1228         } else {
1229                 ndn = op->o_ndn;
1230         }
1231
1232         /*
1233          * FIXME: we need to let clients use proxyAuthz
1234          * otherwise we cannot do symmetric pools of servers;
1235          * we have to live with the fact that a user can
1236          * authorize itself as any ID that is allowed
1237          * by the authzTo directive of the "proxyauthzdn".
1238          */
1239         /*
1240          * NOTE: current Proxy Authorization specification
1241          * and implementation do not allow proxy authorization
1242          * control to be provided with Bind requests
1243          */
1244         /*
1245          * if no bind took place yet, but the connection is bound
1246          * and the "proxyauthzdn" is set, then bind as
1247          * "proxyauthzdn" and explicitly add the proxyAuthz
1248          * control to every operation with the dn bound
1249          * to the connection as control value.
1250          */
1251
1252         /* bind as proxyauthzdn only if no idassert mode
1253          * is requested, or if the client's identity
1254          * is authorized */
1255         switch ( mt->mt_idassert_mode ) {
1256         case LDAP_BACK_IDASSERT_LEGACY:
1257                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1258                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1259                         {
1260                                 *binddn = mt->mt_idassert_authcDN;
1261                                 *bindcred = mt->mt_idassert_passwd;
1262                                 dobind = 1;
1263                         }
1264                 }
1265                 break;
1266
1267         default:
1268                 /* NOTE: rootdn can always idassert */
1269                 if ( BER_BVISNULL( &ndn ) && mt->mt_idassert_authz == NULL ) {
1270                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1271                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1272                                 if ( sendok & LDAP_BACK_SENDERR ) {
1273                                         send_ldap_result( op, rs );
1274                                 }
1275                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1276
1277                         } else {
1278                                 rs->sr_err = LDAP_SUCCESS;
1279                                 *binddn = slap_empty_bv;
1280                                 *bindcred = slap_empty_bv;
1281                                 break;
1282                         }
1283
1284                         goto done;
1285
1286                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1287                         struct berval authcDN;
1288
1289                         if ( BER_BVISNULL( &ndn ) ) {
1290                                 authcDN = slap_empty_bv;
1291
1292                         } else {
1293                                 authcDN = ndn;
1294                         }
1295                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1296                                         &authcDN, &authcDN );
1297                         if ( rs->sr_err != LDAP_SUCCESS ) {
1298                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1299                                         if ( sendok & LDAP_BACK_SENDERR ) {
1300                                                 send_ldap_result( op, rs );
1301                                         }
1302                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1303
1304                                 } else {
1305                                         rs->sr_err = LDAP_SUCCESS;
1306                                         *binddn = slap_empty_bv;
1307                                         *bindcred = slap_empty_bv;
1308                                         break;
1309                                 }
1310
1311                                 goto done;
1312                         }
1313                 }
1314
1315                 *binddn = mt->mt_idassert_authcDN;
1316                 *bindcred = mt->mt_idassert_passwd;
1317                 dobind = 1;
1318                 break;
1319         }
1320
1321         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1322 #ifdef HAVE_CYRUS_SASL
1323                 void            *defaults = NULL;
1324                 struct berval   authzID = BER_BVNULL;
1325                 int             freeauthz = 0;
1326
1327                 /* if SASL supports native authz, prepare for it */
1328                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1329                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1330                 {
1331                         switch ( mt->mt_idassert_mode ) {
1332                         case LDAP_BACK_IDASSERT_OTHERID:
1333                         case LDAP_BACK_IDASSERT_OTHERDN:
1334                                 authzID = mt->mt_idassert_authzID;
1335                                 break;
1336
1337                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1338                                 BER_BVSTR( &authzID, "dn:" );
1339                                 break;
1340
1341                         case LDAP_BACK_IDASSERT_SELF:
1342                                 if ( BER_BVISNULL( &ndn ) ) {
1343                                         /* connection is not authc'd, so don't idassert */
1344                                         BER_BVSTR( &authzID, "dn:" );
1345                                         break;
1346                                 }
1347                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1348                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1349                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1350                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1351                                                 ndn.bv_val, ndn.bv_len + 1 );
1352                                 freeauthz = 1;
1353                                 break;
1354
1355                         default:
1356                                 break;
1357                         }
1358                 }
1359
1360                 if ( mt->mt_idassert_secprops != NULL ) {
1361                         rs->sr_err = ldap_set_option( msc->msc_ld,
1362                                 LDAP_OPT_X_SASL_SECPROPS,
1363                                 (void *)mt->mt_idassert_secprops );
1364
1365                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1366                                 rs->sr_err = LDAP_OTHER;
1367                                 if ( sendok & LDAP_BACK_SENDERR ) {
1368                                         send_ldap_result( op, rs );
1369                                 }
1370                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1371                                 goto done;
1372                         }
1373                 }
1374
1375                 defaults = lutil_sasl_defaults( msc->msc_ld,
1376                                 mt->mt_idassert_sasl_mech.bv_val,
1377                                 mt->mt_idassert_sasl_realm.bv_val,
1378                                 mt->mt_idassert_authcID.bv_val,
1379                                 mt->mt_idassert_passwd.bv_val,
1380                                 authzID.bv_val );
1381
1382                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1383                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1384                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1385                                 defaults );
1386
1387                 rs->sr_err = slap_map_api2result( rs );
1388                 if ( rs->sr_err != LDAP_SUCCESS ) {
1389                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1390                         if ( sendok & LDAP_BACK_SENDERR ) {
1391                                 send_ldap_result( op, rs );
1392                         }
1393
1394                 } else {
1395                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1396                 }
1397
1398                 lutil_sasl_freedefs( defaults );
1399                 if ( freeauthz ) {
1400                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1401                 }
1402
1403                 goto done;
1404 #endif /* HAVE_CYRUS_SASL */
1405         }
1406
1407         *method = mt->mt_idassert_authmethod;
1408         switch ( mt->mt_idassert_authmethod ) {
1409         case LDAP_AUTH_NONE:
1410                 BER_BVSTR( binddn, "" );
1411                 BER_BVSTR( bindcred, "" );
1412                 /* fallthru */
1413
1414         case LDAP_AUTH_SIMPLE:
1415                 break;
1416
1417         default:
1418                 /* unsupported! */
1419                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1420                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1421                 if ( sendok & LDAP_BACK_SENDERR ) {
1422                         send_ldap_result( op, rs );
1423                 }
1424                 break;
1425         }
1426
1427 done:;
1428         return rs->sr_err;
1429 }
1430
1431 static int
1432 meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1433 {
1434         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1435         metatarget_t            *mt = mi->mi_targets[ candidate ];
1436         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1437         struct berval           binddn = BER_BVC( "" ),
1438                                 cred = BER_BVC( "" );
1439         int                     method = LDAP_AUTH_NONE,
1440                                 rc;
1441
1442         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1443         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1444                 int     msgid;
1445
1446                 switch ( method ) {
1447                 case LDAP_AUTH_NONE:
1448                 case LDAP_AUTH_SIMPLE:
1449                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1450                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1451                                         &cred, NULL, NULL, &msgid );
1452                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
1453                         if ( rc == LDAP_SUCCESS ) {
1454                                 /* set rebind stuff in case of successful proxyAuthz bind,
1455                                  * so that referral chasing is attempted using the right
1456                                  * identity */
1457                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1458                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1459
1460                                 if ( LDAP_BACK_SAVECRED( mi ) ) {
1461                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1462                                                 memset( msc->msc_cred.bv_val, 0,
1463                                                         msc->msc_cred.bv_len );
1464                                         }
1465                                         ber_bvreplace( &msc->msc_cred, &cred );
1466                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1467                                 }
1468                         }
1469                         break;
1470
1471                 default:
1472                         assert( 0 );
1473                         break;
1474                 }
1475         }
1476
1477         return LDAP_BACK_CONN_ISBOUND( msc );
1478 }