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 1999-2010 The OpenLDAP Foundation.
   5  * Portions Copyright 2001-2003 Pierangelo Masarati.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by the Howard Chu for inclusion
  19  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  20  * Masarati.
  21  */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26
  27 #include <ac/errno.h>
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30
  31
  32 #define AVL_INTERNAL
  33 #include "slap.h"
  34 #include "../back-ldap/back-ldap.h"
  35 #include "back-meta.h"
  36 #undef ldap_debug       /* silence a warning in ldap-int.h */
  37 #include "../../../libraries/libldap/ldap-int.h"
  38
  39 #include "lutil_ldap.h"
  40
  41 static int
  42 meta_back_proxy_authz_bind(
  43         metaconn_t              *mc,
  44         int                     candidate,
  45         Operation               *op,
  46         SlapReply               *rs,
  47         ldap_back_send_t        sendok );
  48
  49 static int
  50 meta_back_single_bind(
  51         Operation               *op,
  52         SlapReply               *rs,
  53         metaconn_t              *mc,
  54         int                     candidate );
  55
  56 int
  57 meta_back_bind( Operation *op, SlapReply *rs )
  58 {
  59         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
  60         metaconn_t      *mc = NULL;
  61
  62         int             rc = LDAP_OTHER,
  63                         i,
  64                         gotit = 0,
  65                         isroot = 0;
  66
  67         SlapReply       *candidates;
  68
  69         rs->sr_err = LDAP_SUCCESS;
  70
  71         Debug( LDAP_DEBUG_ARGS, "%s meta_back_bind: dn=\"%s\".\n",
  72                 op->o_log_prefix, op->o_req_dn.bv_val, 0 );
  73
  74         /* the test on the bind method should be superfluous */
  75         switch ( be_rootdn_bind( op, rs ) ) {
  76         case LDAP_SUCCESS:
  77                 if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
  78                         /* frontend will return success */
  79                         return rs->sr_err;
  80                 }
  81
  82                 isroot = 1;
  83                 /* fallthru */
  84
  85         case SLAP_CB_CONTINUE:
  86                 break;
  87
  88         default:
  89                 /* be_rootdn_bind() sent result */
  90                 return rs->sr_err;
  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         candidates = meta_back_candidates_get( op );
 126
 127         /*
 128          * Each target is scanned ...
 129          */
 130         mc->mc_authz_target = META_BOUND_NONE;
 131         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 132                 metatarget_t    *mt = mi->mi_targets[ i ];
 133                 int             lerr;
 134
 135                 /*
 136                  * Skip non-candidates
 137                  */
 138                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 139                         continue;
 140                 }
 141
 142                 if ( gotit == 0 ) {
 143                         /* set rc to LDAP_SUCCESS only if at least
 144                          * one candidate has been tried */
 145                         rc = LDAP_SUCCESS;
 146                         gotit = 1;
 147
 148                 } else if ( !isroot ) {
 149                         /*
 150                          * A bind operation is expected to have
 151                          * ONE CANDIDATE ONLY!
 152                          */
 153                         Debug( LDAP_DEBUG_ANY,
 154                                 "### %s meta_back_bind: more than one"
 155                                 " candidate selected...\n",
 156                                 op->o_log_prefix, 0, 0 );
 157                 }
 158
 159                 if ( isroot ) {
 160                         if ( mt->mt_idassert_authmethod == LDAP_AUTH_NONE
 161                                 || BER_BVISNULL( &mt->mt_idassert_authcDN ) )
 162                         {
 163                                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 164
 165                                 /* skip the target if no pseudorootdn is provided */
 166                                 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 167                                         ch_free( msc->msc_bound_ndn.bv_val );
 168                                         BER_BVZERO( &msc->msc_bound_ndn );
 169                                 }
 170
 171                                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 172                                         /* destroy sensitive data */
 173                                         memset( msc->msc_cred.bv_val, 0,
 174                                                 msc->msc_cred.bv_len );
 175                                         ch_free( msc->msc_cred.bv_val );
 176                                         BER_BVZERO( &msc->msc_cred );
 177                                 }
 178
 179                                 continue;
 180                         }
 181
 182
 183                         (void)meta_back_proxy_authz_bind( mc, i, op, rs, LDAP_BACK_DONTSEND );
 184                         lerr = rs->sr_err;
 185
 186                 } else {
 187                         lerr = meta_back_single_bind( op, rs, mc, i );
 188                 }
 189
 190                 if ( lerr != LDAP_SUCCESS ) {
 191                         rc = rs->sr_err = lerr;
 192
 193                         /* FIXME: in some cases (e.g. unavailable)
 194                          * do not assume it's not candidate; rather
 195                          * mark this as an error to be eventually
 196                          * reported to client */
 197                         META_CANDIDATE_CLEAR( &candidates[ i ] );
 198                         break;
 199                 }
 200         }
 201
 202         /* must re-insert if local DN changed as result of bind */
 203         if ( rc == LDAP_SUCCESS ) {
 204                 if ( isroot ) {
 205                         mc->mc_authz_target = META_BOUND_ALL;
 206                 }
 207
 208                 if ( !LDAP_BACK_PCONN_ISPRIV( mc )
 209                         && !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) )
 210                 {
 211                         int             lerr;
 212
 213                         /* wait for all other ops to release the connection */
 214                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 215                         assert( mc->mc_refcnt == 1 );
 216 #if META_BACK_PRINT_CONNTREE > 0
 217                         meta_back_print_conntree( mi, ">>> meta_back_bind" );
 218 #endif /* META_BACK_PRINT_CONNTREE */
 219
 220                         /* delete all cached connections with the current connection */
 221                         if ( LDAP_BACK_SINGLECONN( mi ) ) {
 222                                 metaconn_t      *tmpmc;
 223
 224                                 while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
 225                                 {
 226                                         assert( !LDAP_BACK_PCONN_ISPRIV( mc ) );
 227                                         Debug( LDAP_DEBUG_TRACE,
 228                                                 "=>meta_back_bind: destroying conn %lu (refcnt=%u)\n",
 229                                                 mc->mc_conn->c_connid, mc->mc_refcnt, 0 );
 230
 231                                         if ( tmpmc->mc_refcnt != 0 ) {
 232                                                 /* taint it */
 233                                                 LDAP_BACK_CONN_TAINTED_SET( tmpmc );
 234
 235                                         } else {
 236                                                 /*
 237                                                  * Needs a test because the handler may be corrupted,
 238                                                  * and calling ldap_unbind on a corrupted header results
 239                                                  * in a segmentation fault
 240                                                  */
 241                                                 meta_back_conn_free( tmpmc );
 242                                         }
 243                                 }
 244                         }
 245
 246                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 247                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 248                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 249 #if META_BACK_PRINT_CONNTREE > 0
 250                         meta_back_print_conntree( mi, "<<< meta_back_bind" );
 251 #endif /* META_BACK_PRINT_CONNTREE */
 252                         if ( lerr == 0 ) {
 253 #if 0
 254                                 /* NOTE: a connection cannot be privileged
 255                                  * and be in the avl tree at the same time
 256                                  */
 257                                 if ( isroot ) {
 258                                         LDAP_BACK_CONN_ISPRIV_SET( mc );
 259                                         LDAP_BACK_PCONN_SET( mc, op );
 260                                 }
 261 #endif
 262                                 LDAP_BACK_CONN_CACHED_SET( mc );
 263
 264                         } else {
 265                                 LDAP_BACK_CONN_CACHED_CLEAR( mc );
 266                         }
 267                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 268                 }
 269         }
 270
 271         if ( mc != NULL ) {
 272                 meta_back_release_conn( mi, mc );
 273         }
 274
 275         /*
 276          * rc is LDAP_SUCCESS if at least one bind succeeded,
 277          * err is the last error that occurred during a bind;
 278          * if at least (and at most?) one bind succeeds, fine.
 279          */
 280         if ( rc != LDAP_SUCCESS ) {
 281
 282                 /*
 283                  * deal with bind failure ...
 284                  */
 285
 286                 /*
 287                  * no target was found within the naming context,
 288                  * so bind must fail with invalid credentials
 289                  */
 290                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 291                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 292                 } else {
 293                         rs->sr_err = slap_map_api2result( rs );
 294                 }
 295                 send_ldap_result( op, rs );
 296                 return rs->sr_err;
 297
 298         }
 299
 300         return LDAP_SUCCESS;
 301 }
 302
 303 static int
 304 meta_back_bind_op_result(
 305         Operation               *op,
 306         SlapReply               *rs,
 307         metaconn_t              *mc,
 308         int                     candidate,
 309         int                     msgid,
 310         ldap_back_send_t        sendok )
 311 {
 312         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 313         metatarget_t            *mt = mi->mi_targets[ candidate ];
 314         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 315         LDAPMessage             *res;
 316         struct timeval          tv;
 317         int                     rc;
 318         int                     nretries = mt->mt_nretries;
 319         char                    buf[ SLAP_TEXT_BUFLEN ];
 320
 321         Debug( LDAP_DEBUG_TRACE,
 322                 ">>> %s meta_back_bind_op_result[%d]\n",
 323                 op->o_log_prefix, candidate, 0 );
 324
 325         /* make sure this is clean */
 326         assert( rs->sr_ctrls == NULL );
 327
 328         if ( rs->sr_err == LDAP_SUCCESS ) {
 329                 time_t          stoptime = (time_t)(-1),
 330                                 timeout;
 331                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 332                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 333                 const char      *timeout_text = "Operation timed out";
 334                 slap_op_t       opidx = slap_req2op( op->o_tag );
 335
 336                 /* since timeout is not specified, compute and use
 337                  * the one specific to the ongoing operation */
 338                 if ( opidx == LDAP_REQ_SEARCH ) {
 339                         if ( op->ors_tlimit <= 0 ) {
 340                                 timeout = 0;
 341
 342                         } else {
 343                                 timeout = op->ors_tlimit;
 344                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 345                                 timeout_text = NULL;
 346                         }
 347
 348                 } else {
 349                         timeout = mt->mt_timeout[ opidx ];
 350                 }
 351
 352                 /* better than nothing :) */
 353                 if ( timeout == 0 ) {
 354                         if ( mi->mi_idle_timeout ) {
 355                                 timeout = mi->mi_idle_timeout;
 356
 357                         } else if ( mi->mi_conn_ttl ) {
 358                                 timeout = mi->mi_conn_ttl;
 359                         }
 360                 }
 361
 362                 if ( timeout ) {
 363                         stoptime = op->o_time + timeout;
 364                 }
 365
 366                 LDAP_BACK_TV_SET( &tv );
 367
 368                 /*
 369                  * handle response!!!
 370                  */
 371 retry:;
 372                 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 373                 switch ( rc ) {
 374                 case 0:
 375                         if ( nretries != META_RETRY_NEVER
 376                                 || ( timeout && slap_get_time() <= stoptime ) )
 377                         {
 378                                 ldap_pvt_thread_yield();
 379                                 if ( nretries > 0 ) {
 380                                         nretries--;
 381                                 }
 382                                 tv = mt->mt_bind_timeout;
 383                                 goto retry;
 384                         }
 385
 386                         /* don't let anyone else use this handler,
 387                          * because there's a pending bind that will not
 388                          * be acknowledged */
 389                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 390                         assert( LDAP_BACK_CONN_BINDING( msc ) );
 391
 392 #ifdef DEBUG_205
 393                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_bind_op_result ldap_unbind_ext[%d] ld=%p\n",
 394                                 op->o_log_prefix, candidate, (void *)msc->msc_ld );
 395 #endif /* DEBUG_205 */
 396
 397                         meta_clear_one_candidate( op, mc, candidate );
 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_ERROR_NUMBER,
 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                         rs->sr_err = slap_map_api2result( rs );
 429                         break;
 430                 }
 431         }
 432
 433         rs->sr_err = slap_map_api2result( rs );
 434
 435         Debug( LDAP_DEBUG_TRACE,
 436                 "<<< %s meta_back_bind_op_result[%d] err=%d\n",
 437                 op->o_log_prefix, candidate, rs->sr_err );
 438
 439         return rs->sr_err;
 440 }
 441
 442 /*
 443  * meta_back_single_bind
 444  *
 445  * attempts to perform a bind with creds
 446  */
 447 static int
 448 meta_back_single_bind(
 449         Operation               *op,
 450         SlapReply               *rs,
 451         metaconn_t              *mc,
 452         int                     candidate )
 453 {
 454         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 455         metatarget_t            *mt = mi->mi_targets[ candidate ];
 456         struct berval           mdn = BER_BVNULL;
 457         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 458         int                     msgid;
 459         dncookie                dc;
 460         struct berval           save_o_dn;
 461         int                     save_o_do_not_cache;
 462         LDAPControl             **ctrls = NULL;
 463
 464         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 465                 ch_free( msc->msc_bound_ndn.bv_val );
 466                 BER_BVZERO( &msc->msc_bound_ndn );
 467         }
 468
 469         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 470                 /* destroy sensitive data */
 471                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 472                 ch_free( msc->msc_cred.bv_val );
 473                 BER_BVZERO( &msc->msc_cred );
 474         }
 475
 476         /*
 477          * Rewrite the bind dn if needed
 478          */
 479         dc.target = mt;
 480         dc.conn = op->o_conn;
 481         dc.rs = rs;
 482         dc.ctx = "bindDN";
 483
 484         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 485                 rs->sr_text = "DN rewrite error";
 486                 rs->sr_err = LDAP_OTHER;
 487                 return rs->sr_err;
 488         }
 489
 490         /* don't add proxyAuthz; set the bindDN */
 491         save_o_dn = op->o_dn;
 492         save_o_do_not_cache = op->o_do_not_cache;
 493         op->o_do_not_cache = 1;
 494         op->o_dn = op->o_req_dn;
 495
 496         ctrls = op->o_ctrls;
 497         rs->sr_err = meta_back_controls_add( op, rs, mc, candidate, &ctrls );
 498         op->o_dn = save_o_dn;
 499         op->o_do_not_cache = save_o_do_not_cache;
 500         if ( rs->sr_err != LDAP_SUCCESS ) {
 501                 goto return_results;
 502         }
 503
 504         /* FIXME: this fixes the bind problem right now; we need
 505          * to use the asynchronous version to get the "matched"
 506          * and more in case of failure ... */
 507         /* FIXME: should we check if at least some of the op->o_ctrls
 508          * can/should be passed? */
 509         for (;;) {
 510                 rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 511                         LDAP_SASL_SIMPLE, &op->orb_cred,
 512                         ctrls, NULL, &msgid );
 513                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
 514                         break;
 515                 }
 516                 ldap_pvt_thread_yield();
 517         }
 518
 519         mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
 520
 521         meta_back_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND );
 522         if ( rs->sr_err != LDAP_SUCCESS ) {
 523                 goto return_results;
 524         }
 525
 526         /* If defined, proxyAuthz will be used also when
 527          * back-ldap is the authorizing backend; for this
 528          * purpose, a successful bind is followed by a
 529          * bind with the configured identity assertion */
 530         /* NOTE: use with care */
 531         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 532                 meta_back_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR );
 533                 if ( !LDAP_BACK_CONN_ISBOUND( msc ) ) {
 534                         goto return_results;
 535                 }
 536                 goto cache_refresh;
 537         }
 538
 539         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_ndn );
 540         LDAP_BACK_CONN_ISBOUND_SET( msc );
 541         mc->mc_authz_target = candidate;
 542
 543         if ( META_BACK_TGT_SAVECRED( mt ) ) {
 544                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 545                         memset( msc->msc_cred.bv_val, 0,
 546                                 msc->msc_cred.bv_len );
 547                 }
 548                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 549                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 550         }
 551
 552 cache_refresh:;
 553         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 554                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 555         {
 556                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 557                                 &op->o_req_ndn, candidate );
 558         }
 559
 560 return_results:;
 561         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 562                 free( mdn.bv_val );
 563         }
 564
 565         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 566                 meta_back_quarantine( op, rs, candidate );
 567         }
 568
 569         return rs->sr_err;
 570 }
 571
 572 /*
 573  * meta_back_single_dobind
 574  */
 575 int
 576 meta_back_single_dobind(
 577         Operation               *op,
 578         SlapReply               *rs,
 579         metaconn_t              **mcp,
 580         int                     candidate,
 581         ldap_back_send_t        sendok,
 582         int                     nretries,
 583         int                     dolock )
 584 {
 585         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 586         metatarget_t            *mt = mi->mi_targets[ candidate ];
 587         metaconn_t              *mc = *mcp;
 588         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 589         int                     msgid;
 590
 591         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 592
 593         /* NOTE: this obsoletes pseudorootdn */
 594         if ( op->o_conn != NULL &&
 595                 !op->o_do_not_cache &&
 596                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 597                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 598                         ( LDAP_BACK_CONN_ISPRIV( mc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
 599                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 600         {
 601                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
 602
 603         } else {
 604                 char *binddn = "";
 605                 struct berval cred = BER_BVC( "" );
 606
 607                 /* use credentials if available */
 608                 if ( !BER_BVISNULL( &msc->msc_bound_ndn )
 609                         && !BER_BVISNULL( &msc->msc_cred ) )
 610                 {
 611                         binddn = msc->msc_bound_ndn.bv_val;
 612                         cred = msc->msc_cred;
 613                 }
 614
 615                 /* FIXME: should we check if at least some of the op->o_ctrls
 616                  * can/should be passed? */
 617                 for (;;) {
 618                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
 619                                 binddn, LDAP_SASL_SIMPLE, &cred,
 620                                 NULL, NULL, &msgid );
 621                         if ( rs->sr_err != LDAP_X_CONNECTING ) {
 622                                 break;
 623                         }
 624                         ldap_pvt_thread_yield();
 625                 }
 626
 627                 rs->sr_err = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
 628
 629                 /* if bind succeeded, but anonymous, clear msc_bound_ndn */
 630                 if ( rs->sr_err == LDAP_SUCCESS ) {
 631                         if ( binddn[0] == '\0' &&
 632                                 !BER_BVISNULL( &msc->msc_bound_ndn ) &&
 633                                 !BER_BVISEMPTY( &msc->msc_bound_ndn ) )
 634                         {
 635                                 ber_memfree( msc->msc_bound_ndn.bv_val );
 636                                 BER_BVZERO( &msc->msc_bound_ndn );
 637                         }
 638                 }
 639         }
 640
 641         if ( rs->sr_err != LDAP_SUCCESS ) {
 642                 if ( dolock ) {
 643                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 644                 }
 645                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 646                 if ( META_BACK_ONERR_STOP( mi ) ) {
 647                         LDAP_BACK_CONN_TAINTED_SET( mc );
 648                         meta_back_release_conn_lock( mi, mc, 0 );
 649                         *mcp = NULL;
 650                 }
 651                 if ( dolock ) {
 652                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 653                 }
 654         }
 655
 656         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 657                 meta_back_quarantine( op, rs, candidate );
 658         }
 659
 660         return rs->sr_err;
 661 }
 662
 663 /*
 664  * meta_back_dobind
 665  */
 666 int
 667 meta_back_dobind(
 668         Operation               *op,
 669         SlapReply               *rs,
 670         metaconn_t              *mc,
 671         ldap_back_send_t        sendok )
 672 {
 673         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 674
 675         int                     bound = 0,
 676                                 i,
 677                                 isroot = 0;
 678
 679         SlapReply               *candidates;
 680
 681         if ( be_isroot( op ) ) {
 682                 isroot = 1;
 683         }
 684
 685         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 686                 char buf[STRLENOF("4294967295U") + 1] = { 0 };
 687                 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
 688
 689                 Debug( LDAP_DEBUG_TRACE,
 690                         "%s meta_back_dobind: conn=%s%s\n",
 691                         op->o_log_prefix, buf,
 692                         isroot ? " (isroot)" : "" );
 693         }
 694
 695         /*
 696          * all the targets are bound as pseudoroot
 697          */
 698         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 699                 bound = 1;
 700                 goto done;
 701         }
 702
 703         candidates = meta_back_candidates_get( op );
 704
 705         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 706                 metatarget_t            *mt = mi->mi_targets[ i ];
 707                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 708                 int                     rc;
 709
 710                 /*
 711                  * Not a candidate
 712                  */
 713                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 714                         continue;
 715                 }
 716
 717                 assert( msc->msc_ld != NULL );
 718
 719                 /*
 720                  * If the target is already bound it is skipped
 721                  */
 722
 723 retry_binding:;
 724                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 725                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 726                         || ( LDAP_BACK_CONN_ISANON( msc )
 727                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 728                 {
 729                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 730                         ++bound;
 731                         continue;
 732
 733                 } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
 734                 {
 735                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 736                         ldap_pvt_thread_yield();
 737                         goto retry_binding;
 738
 739                 }
 740
 741                 LDAP_BACK_CONN_BINDING_SET( msc );
 742                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 743
 744                 rc = meta_back_single_dobind( op, rs, &mc, i,
 745                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 746                 /*
 747                  * NOTE: meta_back_single_dobind() already retries;
 748                  * in case of failure, it resets mc...
 749                  */
 750                 if ( rc != LDAP_SUCCESS ) {
 751                         char            buf[ SLAP_TEXT_BUFLEN ];
 752
 753                         if ( mc == NULL ) {
 754                                 /* meta_back_single_dobind() already sent
 755                                  * response and released connection */
 756                                 goto send_err;
 757                         }
 758
 759
 760                         if ( rc == LDAP_UNAVAILABLE ) {
 761                                 /* FIXME: meta_back_retry() already re-calls
 762                                  * meta_back_single_dobind() */
 763                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 764                                         goto retry_ok;
 765                                 }
 766
 767                                 if ( mc != NULL ) {
 768                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 769                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 770                                         meta_back_release_conn_lock( mi, mc, 0 );
 771                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 772                                 }
 773
 774                                 return 0;
 775                         }
 776
 777                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 778                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 779                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 780
 781                         snprintf( buf, sizeof( buf ),
 782                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 783                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 784                                 rc, ldap_err2string( rc ) );
 785                         Debug( LDAP_DEBUG_ANY,
 786                                 "%s %s\n",
 787                                 op->o_log_prefix, buf, 0 );
 788
 789                         /*
 790                          * null cred bind should always succeed
 791                          * as anonymous, so a failure means
 792                          * the target is no longer candidate possibly
 793                          * due to technical reasons (remote host down?)
 794                          * so better clear the handle
 795                          */
 796                         /* leave the target candidate, but record the error for later use */
 797                         candidates[ i ].sr_err = rc;
 798                         if ( META_BACK_ONERR_STOP( mi ) ) {
 799                                 bound = 0;
 800                                 goto done;
 801                         }
 802
 803                         continue;
 804                 } /* else */
 805
 806 retry_ok:;
 807                 Debug( LDAP_DEBUG_TRACE,
 808                         "%s meta_back_dobind[%d]: "
 809                         "(%s)\n",
 810                         op->o_log_prefix, i,
 811                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 812
 813                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 814                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 815                 if ( isroot ) {
 816                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 817                 } else {
 818                         LDAP_BACK_CONN_ISANON_SET( msc );
 819                 }
 820                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 821                 ++bound;
 822         }
 823
 824 done:;
 825         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 826                 char buf[STRLENOF("4294967295U") + 1] = { 0 };
 827                 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
 828
 829                 Debug( LDAP_DEBUG_TRACE,
 830                         "%s meta_back_dobind: conn=%s bound=%d\n",
 831                         op->o_log_prefix, buf, bound );
 832         }
 833
 834         if ( bound == 0 ) {
 835                 meta_back_release_conn( mi, mc );
 836
 837 send_err:;
 838                 if ( sendok & LDAP_BACK_SENDERR ) {
 839                         if ( rs->sr_err == LDAP_SUCCESS ) {
 840                                 rs->sr_err = LDAP_BUSY;
 841                         }
 842                         send_ldap_result( op, rs );
 843                 }
 844
 845                 return 0;
 846         }
 847
 848         return ( bound > 0 );
 849 }
 850
 851 /*
 852  * meta_back_default_rebind
 853  *
 854  * This is a callback used for chasing referrals using the same
 855  * credentials as the original user on this session.
 856  */
 857 int
 858 meta_back_default_rebind(
 859         LDAP                    *ld,
 860         LDAP_CONST char         *url,
 861         ber_tag_t               request,
 862         ber_int_t               msgid,
 863         void                    *params )
 864 {
 865         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 866
 867         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 868                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 869                         NULL, NULL, NULL );
 870 }
 871
 872 /*
 873  * meta_back_default_urllist
 874  *
 875  * This is a callback used for mucking with the urllist
 876  */
 877 int
 878 meta_back_default_urllist(
 879         LDAP            *ld,
 880         LDAPURLDesc     **urllist,
 881         LDAPURLDesc     **url,
 882         void            *params )
 883 {
 884         metatarget_t    *mt = (metatarget_t *)params;
 885         LDAPURLDesc     **urltail;
 886
 887         if ( urllist == url ) {
 888                 return LDAP_SUCCESS;
 889         }
 890
 891         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 892                 /* count */ ;
 893
 894         *urltail = *urllist;
 895         *urllist = *url;
 896         *url = NULL;
 897
 898         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 899         if ( mt->mt_uri ) {
 900                 ch_free( mt->mt_uri );
 901         }
 902
 903         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 904         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 905
 906         return LDAP_SUCCESS;
 907 }
 908
 909 int
 910 meta_back_cancel(
 911         metaconn_t              *mc,
 912         Operation               *op,
 913         SlapReply               *rs,
 914         ber_int_t               msgid,
 915         int                     candidate,
 916         ldap_back_send_t        sendok )
 917 {
 918         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 919
 920         metatarget_t            *mt = mi->mi_targets[ candidate ];
 921         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 922
 923         int                     rc = LDAP_OTHER;
 924
 925         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 926                 op->o_log_prefix, candidate, msgid );
 927
 928         /* default behavior */
 929         if ( META_BACK_TGT_ABANDON( mt ) ) {
 930                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 931
 932         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 933                 rc = ldap_pvt_discard( msc->msc_ld, msgid );
 934
 935         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 936                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 937
 938         } else {
 939                 assert( 0 );
 940         }
 941
 942         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 943                 op->o_log_prefix, candidate, rc );
 944
 945         return rc;
 946 }
 947
 948
 949
 950 /*
 951  * FIXME: error return must be handled in a cleaner way ...
 952  */
 953 int
 954 meta_back_op_result(
 955         metaconn_t              *mc,
 956         Operation               *op,
 957         SlapReply               *rs,
 958         int                     candidate,
 959         ber_int_t               msgid,
 960         time_t                  timeout,
 961         ldap_back_send_t        sendok )
 962 {
 963         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 964
 965         const char      *save_text = rs->sr_text,
 966                         *save_matched = rs->sr_matched;
 967         BerVarray       save_ref = rs->sr_ref;
 968         LDAPControl     **save_ctrls = rs->sr_ctrls;
 969         void            *matched_ctx = NULL;
 970
 971         char            *matched = NULL;
 972         char            *text = NULL;
 973         char            **refs = NULL;
 974         LDAPControl     **ctrls = NULL;
 975
 976         assert( mc != NULL );
 977
 978         rs->sr_text = NULL;
 979         rs->sr_matched = NULL;
 980         rs->sr_ref = NULL;
 981         rs->sr_ctrls = NULL;
 982
 983         if ( candidate != META_TARGET_NONE ) {
 984                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 985                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 986
 987                 if ( LDAP_ERR_OK( rs->sr_err ) ) {
 988                         int             rc;
 989                         struct timeval  tv;
 990                         LDAPMessage     *res = NULL;
 991                         time_t          stoptime = (time_t)(-1);
 992                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 993                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 994                         const char      *timeout_text = "Operation timed out";
 995
 996                         /* if timeout is not specified, compute and use
 997                          * the one specific to the ongoing operation */
 998                         if ( timeout == (time_t)(-1) ) {
 999                                 slap_op_t       opidx = slap_req2op( op->o_tag );
1000
1001                                 if ( opidx == SLAP_OP_SEARCH ) {
1002                                         if ( op->ors_tlimit <= 0 ) {
1003                                                 timeout = 0;
1004
1005                                         } else {
1006                                                 timeout = op->ors_tlimit;
1007                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
1008                                                 timeout_text = NULL;
1009                                         }
1010
1011                                 } else {
1012                                         timeout = mt->mt_timeout[ opidx ];
1013                                 }
1014                         }
1015
1016                         /* better than nothing :) */
1017                         if ( timeout == 0 ) {
1018                                 if ( mi->mi_idle_timeout ) {
1019                                         timeout = mi->mi_idle_timeout;
1020
1021                                 } else if ( mi->mi_conn_ttl ) {
1022                                         timeout = mi->mi_conn_ttl;
1023                                 }
1024                         }
1025
1026                         if ( timeout ) {
1027                                 stoptime = op->o_time + timeout;
1028                         }
1029
1030                         LDAP_BACK_TV_SET( &tv );
1031
1032 retry:;
1033                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1034                         switch ( rc ) {
1035                         case 0:
1036                                 if ( timeout && slap_get_time() > stoptime ) {
1037                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
1038                                         rs->sr_err = timeout_err;
1039                                         rs->sr_text = timeout_text;
1040                                         break;
1041                                 }
1042
1043                                 LDAP_BACK_TV_SET( &tv );
1044                                 ldap_pvt_thread_yield();
1045                                 goto retry;
1046
1047                         case -1:
1048                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
1049                                                 &rs->sr_err );
1050                                 break;
1051
1052
1053                         /* otherwise get the result; if it is not
1054                          * LDAP_SUCCESS, record it in the reply
1055                          * structure (this includes
1056                          * LDAP_COMPARE_{TRUE|FALSE}) */
1057                         default:
1058                                 /* only touch when activity actually took place... */
1059                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
1060                                         msc->msc_time = op->o_time;
1061                                 }
1062
1063                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
1064                                                 &matched, &text, &refs, &ctrls, 1 );
1065                                 res = NULL;
1066                                 if ( rc == LDAP_SUCCESS ) {
1067                                         rs->sr_text = text;
1068                                 } else {
1069                                         rs->sr_err = rc;
1070                                 }
1071                                 rs->sr_err = slap_map_api2result( rs );
1072
1073                                 /* RFC 4511: referrals can only appear
1074                                  * if result code is LDAP_REFERRAL */
1075                                 if ( refs != NULL
1076                                         && refs[ 0 ] != NULL
1077                                         && refs[ 0 ][ 0 ] != '\0' )
1078                                 {
1079                                         if ( rs->sr_err != LDAP_REFERRAL ) {
1080                                                 Debug( LDAP_DEBUG_ANY,
1081                                                         "%s meta_back_op_result[%d]: "
1082                                                         "got referrals with err=%d\n",
1083                                                         op->o_log_prefix,
1084                                                         candidate, rs->sr_err );
1085
1086                                         } else {
1087                                                 int     i;
1088
1089                                                 for ( i = 0; refs[ i ] != NULL; i++ )
1090                                                         /* count */ ;
1091                                                 rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1092                                                         op->o_tmpmemctx );
1093                                                 for ( i = 0; refs[ i ] != NULL; i++ ) {
1094                                                         ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1095                                                 }
1096                                                 BER_BVZERO( &rs->sr_ref[ i ] );
1097                                         }
1098
1099                                 } else if ( rs->sr_err == LDAP_REFERRAL ) {
1100                                         Debug( LDAP_DEBUG_ANY,
1101                                                 "%s meta_back_op_result[%d]: "
1102                                                 "got err=%d with null "
1103                                                 "or empty referrals\n",
1104                                                 op->o_log_prefix,
1105                                                 candidate, rs->sr_err );
1106
1107                                         rs->sr_err = LDAP_NO_SUCH_OBJECT;
1108                                 }
1109
1110                                 if ( ctrls != NULL ) {
1111                                         rs->sr_ctrls = ctrls;
1112                                 }
1113                         }
1114
1115                         assert( res == NULL );
1116                 }
1117
1118                 /* if the error in the reply structure is not
1119                  * LDAP_SUCCESS, try to map it from client
1120                  * to server error */
1121                 if ( !LDAP_ERR_OK( rs->sr_err ) ) {
1122                         rs->sr_err = slap_map_api2result( rs );
1123
1124                         /* internal ops ( op->o_conn == NULL )
1125                          * must not reply to client */
1126                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1127
1128                                 /* record the (massaged) matched
1129                                  * DN into the reply structure */
1130                                 rs->sr_matched = matched;
1131                         }
1132                 }
1133
1134                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1135                         meta_back_quarantine( op, rs, candidate );
1136                 }
1137
1138         } else {
1139                 int     i,
1140                         err = rs->sr_err;
1141
1142                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1143                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1144                         char                    *xtext = NULL;
1145                         char                    *xmatched = NULL;
1146
1147                         if ( msc->msc_ld == NULL ) {
1148                                 continue;
1149                         }
1150
1151                         rs->sr_err = LDAP_SUCCESS;
1152
1153                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rs->sr_err );
1154                         if ( rs->sr_err != LDAP_SUCCESS ) {
1155                                 /*
1156                                  * better check the type of error. In some cases
1157                                  * (search ?) it might be better to return a
1158                                  * success if at least one of the targets gave
1159                                  * positive result ...
1160                                  */
1161                                 ldap_get_option( msc->msc_ld,
1162                                                 LDAP_OPT_DIAGNOSTIC_MESSAGE, &xtext );
1163                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1164                                         ldap_memfree( xtext );
1165                                         xtext = NULL;
1166                                 }
1167
1168                                 ldap_get_option( msc->msc_ld,
1169                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1170                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1171                                         ldap_memfree( xmatched );
1172                                         xmatched = NULL;
1173                                 }
1174
1175                                 rs->sr_err = slap_map_api2result( rs );
1176
1177                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1178                                         char    buf[ SLAP_TEXT_BUFLEN ];
1179
1180                                         snprintf( buf, sizeof( buf ),
1181                                                 "meta_back_op_result[%d] "
1182                                                 "err=%d text=\"%s\" matched=\"%s\"",
1183                                                 i, rs->sr_err,
1184                                                 ( xtext ? xtext : "" ),
1185                                                 ( xmatched ? xmatched : "" ) );
1186                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1187                                                 op->o_log_prefix, buf, 0 );
1188                                 }
1189
1190                                 /*
1191                                  * FIXME: need to rewrite "match" (need rwinfo)
1192                                  */
1193                                 switch ( rs->sr_err ) {
1194                                 default:
1195                                         err = rs->sr_err;
1196                                         if ( xtext != NULL ) {
1197                                                 if ( text ) {
1198                                                         ldap_memfree( text );
1199                                                 }
1200                                                 text = xtext;
1201                                                 xtext = NULL;
1202                                         }
1203                                         if ( xmatched != NULL ) {
1204                                                 if ( matched ) {
1205                                                         ldap_memfree( matched );
1206                                                 }
1207                                                 matched = xmatched;
1208                                                 xmatched = NULL;
1209                                         }
1210                                         break;
1211                                 }
1212
1213                                 if ( xtext ) {
1214                                         ldap_memfree( xtext );
1215                                 }
1216
1217                                 if ( xmatched ) {
1218                                         ldap_memfree( xmatched );
1219                                 }
1220                         }
1221
1222                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1223                                 meta_back_quarantine( op, rs, i );
1224                         }
1225                 }
1226
1227                 if ( err != LDAP_SUCCESS ) {
1228                         rs->sr_err = err;
1229                 }
1230         }
1231
1232         if ( matched != NULL ) {
1233                 struct berval   dn, pdn;
1234
1235                 ber_str2bv( matched, 0, 0, &dn );
1236                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1237                         ldap_memfree( matched );
1238                         matched_ctx = op->o_tmpmemctx;
1239                         matched = pdn.bv_val;
1240                 }
1241                 rs->sr_matched = matched;
1242         }
1243
1244         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1245                 if ( !( sendok & LDAP_BACK_RETRYING ) ) {
1246                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1247                                 if ( rs->sr_text == NULL ) rs->sr_text = "Proxy operation retry failed";
1248                                 send_ldap_result( op, rs );
1249                         }
1250                 }
1251
1252         } else if ( op->o_conn &&
1253                 ( ( ( sendok & LDAP_BACK_SENDOK ) && LDAP_ERR_OK( rs->sr_err ) )
1254                         || ( ( sendok & LDAP_BACK_SENDERR ) && !LDAP_ERR_OK( rs->sr_err ) ) ) )
1255         {
1256                 send_ldap_result( op, rs );
1257         }
1258         if ( matched ) {
1259                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1260         }
1261         if ( text ) {
1262                 ldap_memfree( text );
1263         }
1264         if ( rs->sr_ref ) {
1265                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1266                 rs->sr_ref = NULL;
1267         }
1268         if ( refs ) {
1269                 ber_memvfree( (void **)refs );
1270         }
1271         if ( ctrls ) {
1272                 assert( rs->sr_ctrls != NULL );
1273                 ldap_controls_free( ctrls );
1274         }
1275
1276         rs->sr_text = save_text;
1277         rs->sr_matched = save_matched;
1278         rs->sr_ref = save_ref;
1279         rs->sr_ctrls = save_ctrls;
1280
1281         return( LDAP_ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1282 }
1283
1284 /*
1285  * meta_back_proxy_authz_cred()
1286  *
1287  * prepares credentials & method for meta_back_proxy_authz_bind();
1288  * or, if method is SASL, performs the SASL bind directly.
1289  */
1290 int
1291 meta_back_proxy_authz_cred(
1292         metaconn_t              *mc,
1293         int                     candidate,
1294         Operation               *op,
1295         SlapReply               *rs,
1296         ldap_back_send_t        sendok,
1297         struct berval           *binddn,
1298         struct berval           *bindcred,
1299         int                     *method )
1300 {
1301         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1302         metatarget_t            *mt = mi->mi_targets[ candidate ];
1303         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1304         struct berval           ndn;
1305         int                     dobind = 0;
1306
1307         /* don't proxyAuthz if protocol is not LDAPv3 */
1308         switch ( mt->mt_version ) {
1309         case LDAP_VERSION3:
1310                 break;
1311
1312         case 0:
1313                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1314                         break;
1315                 }
1316                 /* fall thru */
1317
1318         default:
1319                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1320                 if ( sendok & LDAP_BACK_SENDERR ) {
1321                         send_ldap_result( op, rs );
1322                 }
1323                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1324                 goto done;
1325         }
1326
1327         if ( op->o_tag == LDAP_REQ_BIND ) {
1328                 ndn = op->o_req_ndn;
1329
1330         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1331                 ndn = op->o_conn->c_ndn;
1332
1333         } else {
1334                 ndn = op->o_ndn;
1335         }
1336
1337         /*
1338          * FIXME: we need to let clients use proxyAuthz
1339          * otherwise we cannot do symmetric pools of servers;
1340          * we have to live with the fact that a user can
1341          * authorize itself as any ID that is allowed
1342          * by the authzTo directive of the "proxyauthzdn".
1343          */
1344         /*
1345          * NOTE: current Proxy Authorization specification
1346          * and implementation do not allow proxy authorization
1347          * control to be provided with Bind requests
1348          */
1349         /*
1350          * if no bind took place yet, but the connection is bound
1351          * and the "proxyauthzdn" is set, then bind as
1352          * "proxyauthzdn" and explicitly add the proxyAuthz
1353          * control to every operation with the dn bound
1354          * to the connection as control value.
1355          */
1356
1357         /* bind as proxyauthzdn only if no idassert mode
1358          * is requested, or if the client's identity
1359          * is authorized */
1360         switch ( mt->mt_idassert_mode ) {
1361         case LDAP_BACK_IDASSERT_LEGACY:
1362                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1363                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1364                         {
1365                                 *binddn = mt->mt_idassert_authcDN;
1366                                 *bindcred = mt->mt_idassert_passwd;
1367                                 dobind = 1;
1368                         }
1369                 }
1370                 break;
1371
1372         default:
1373                 /* NOTE: rootdn can always idassert */
1374                 if ( BER_BVISNULL( &ndn )
1375                         && mt->mt_idassert_authz == NULL
1376                         && !( mt->mt_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
1377                 {
1378                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1379                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1380                                 if ( sendok & LDAP_BACK_SENDERR ) {
1381                                         send_ldap_result( op, rs );
1382                                 }
1383                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1384                                 goto done;
1385
1386                         }
1387
1388                         rs->sr_err = LDAP_SUCCESS;
1389                         *binddn = slap_empty_bv;
1390                         *bindcred = slap_empty_bv;
1391                         break;
1392
1393                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1394                         struct berval authcDN;
1395
1396                         if ( BER_BVISNULL( &ndn ) ) {
1397                                 authcDN = slap_empty_bv;
1398
1399                         } else {
1400                                 authcDN = ndn;
1401                         }
1402                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1403                                         &authcDN, &authcDN );
1404                         if ( rs->sr_err != LDAP_SUCCESS ) {
1405                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1406                                         if ( sendok & LDAP_BACK_SENDERR ) {
1407                                                 send_ldap_result( op, rs );
1408                                         }
1409                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1410                                         goto done;
1411                                 }
1412
1413                                 rs->sr_err = LDAP_SUCCESS;
1414                                 *binddn = slap_empty_bv;
1415                                 *bindcred = slap_empty_bv;
1416                                 break;
1417                         }
1418                 }
1419
1420                 *binddn = mt->mt_idassert_authcDN;
1421                 *bindcred = mt->mt_idassert_passwd;
1422                 dobind = 1;
1423                 break;
1424         }
1425
1426         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1427 #ifdef HAVE_CYRUS_SASL
1428                 void            *defaults = NULL;
1429                 struct berval   authzID = BER_BVNULL;
1430                 int             freeauthz = 0;
1431
1432                 /* if SASL supports native authz, prepare for it */
1433                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1434                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1435                 {
1436                         switch ( mt->mt_idassert_mode ) {
1437                         case LDAP_BACK_IDASSERT_OTHERID:
1438                         case LDAP_BACK_IDASSERT_OTHERDN:
1439                                 authzID = mt->mt_idassert_authzID;
1440                                 break;
1441
1442                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1443                                 BER_BVSTR( &authzID, "dn:" );
1444                                 break;
1445
1446                         case LDAP_BACK_IDASSERT_SELF:
1447                                 if ( BER_BVISNULL( &ndn ) ) {
1448                                         /* connection is not authc'd, so don't idassert */
1449                                         BER_BVSTR( &authzID, "dn:" );
1450                                         break;
1451                                 }
1452                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1453                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1454                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1455                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1456                                                 ndn.bv_val, ndn.bv_len + 1 );
1457                                 freeauthz = 1;
1458                                 break;
1459
1460                         default:
1461                                 break;
1462                         }
1463                 }
1464
1465                 if ( mt->mt_idassert_secprops != NULL ) {
1466                         rs->sr_err = ldap_set_option( msc->msc_ld,
1467                                 LDAP_OPT_X_SASL_SECPROPS,
1468                                 (void *)mt->mt_idassert_secprops );
1469
1470                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1471                                 rs->sr_err = LDAP_OTHER;
1472                                 if ( sendok & LDAP_BACK_SENDERR ) {
1473                                         send_ldap_result( op, rs );
1474                                 }
1475                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1476                                 goto done;
1477                         }
1478                 }
1479
1480                 defaults = lutil_sasl_defaults( msc->msc_ld,
1481                                 mt->mt_idassert_sasl_mech.bv_val,
1482                                 mt->mt_idassert_sasl_realm.bv_val,
1483                                 mt->mt_idassert_authcID.bv_val,
1484                                 mt->mt_idassert_passwd.bv_val,
1485                                 authzID.bv_val );
1486                 if ( defaults == NULL ) {
1487                         rs->sr_err = LDAP_OTHER;
1488                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1489                         if ( sendok & LDAP_BACK_SENDERR ) {
1490                                 send_ldap_result( op, rs );
1491                         }
1492                         goto done;
1493                 }
1494
1495                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1496                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1497                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1498                                 defaults );
1499
1500                 rs->sr_err = slap_map_api2result( rs );
1501                 if ( rs->sr_err != LDAP_SUCCESS ) {
1502                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1503                         if ( sendok & LDAP_BACK_SENDERR ) {
1504                                 send_ldap_result( op, rs );
1505                         }
1506
1507                 } else {
1508                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1509                 }
1510
1511                 lutil_sasl_freedefs( defaults );
1512                 if ( freeauthz ) {
1513                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1514                 }
1515
1516                 goto done;
1517 #endif /* HAVE_CYRUS_SASL */
1518         }
1519
1520         *method = mt->mt_idassert_authmethod;
1521         switch ( mt->mt_idassert_authmethod ) {
1522         case LDAP_AUTH_NONE:
1523                 BER_BVSTR( binddn, "" );
1524                 BER_BVSTR( bindcred, "" );
1525                 /* fallthru */
1526
1527         case LDAP_AUTH_SIMPLE:
1528                 break;
1529
1530         default:
1531                 /* unsupported! */
1532                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1533                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1534                 if ( sendok & LDAP_BACK_SENDERR ) {
1535                         send_ldap_result( op, rs );
1536                 }
1537                 break;
1538         }
1539
1540 done:;
1541
1542         if ( !BER_BVISEMPTY( binddn ) ) {
1543                 LDAP_BACK_CONN_ISIDASSERT_SET( msc );
1544         }
1545
1546         return rs->sr_err;
1547 }
1548
1549 static int
1550 meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1551 {
1552         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1553         metatarget_t            *mt = mi->mi_targets[ candidate ];
1554         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1555         struct berval           binddn = BER_BVC( "" ),
1556                                 cred = BER_BVC( "" );
1557         int                     method = LDAP_AUTH_NONE,
1558                                 rc;
1559
1560         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1561         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1562                 int     msgid;
1563
1564                 switch ( method ) {
1565                 case LDAP_AUTH_NONE:
1566                 case LDAP_AUTH_SIMPLE:
1567                         for (;;) {
1568                                 rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1569                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1570                                         &cred, NULL, NULL, &msgid );
1571                                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
1572                                         break;
1573                                 }
1574                                 ldap_pvt_thread_yield();
1575                         }
1576                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
1577                         if ( rc == LDAP_SUCCESS ) {
1578                                 /* set rebind stuff in case of successful proxyAuthz bind,
1579                                  * so that referral chasing is attempted using the right
1580                                  * identity */
1581                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1582                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1583
1584                                 if ( META_BACK_TGT_SAVECRED( mt ) ) {
1585                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1586                                                 memset( msc->msc_cred.bv_val, 0,
1587                                                         msc->msc_cred.bv_len );
1588                                         }
1589                                         ber_bvreplace( &msc->msc_cred, &cred );
1590                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1591                                 }
1592                         }
1593                         break;
1594
1595                 default:
1596                         assert( 0 );
1597                         break;
1598                 }
1599         }
1600
1601         return LDAP_BACK_CONN_ISBOUND( msc );
1602 }
1603
1604 /*
1605  * Add controls;
1606  *
1607  * if any needs to be added, it is prepended to existing ones,
1608  * in a newly allocated array.  The companion function
1609  * mi->mi_ldap_extra->controls_free() must be used to restore the original
1610  * status of op->o_ctrls.
1611  */
1612 int
1613 meta_back_controls_add(
1614                 Operation       *op,
1615                 SlapReply       *rs,
1616                 metaconn_t      *mc,
1617                 int             candidate,
1618                 LDAPControl     ***pctrls )
1619 {
1620         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1621         metatarget_t            *mt = mi->mi_targets[ candidate ];
1622         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1623
1624         LDAPControl             **ctrls = NULL;
1625         /* set to the maximum number of controls this backend can add */
1626         LDAPControl             c[ 2 ] = {{ 0 }};
1627         int                     n = 0, i, j1 = 0, j2 = 0;
1628
1629         *pctrls = NULL;
1630
1631         rs->sr_err = LDAP_SUCCESS;
1632
1633         /* don't add controls if protocol is not LDAPv3 */
1634         switch ( mt->mt_version ) {
1635         case LDAP_VERSION3:
1636                 break;
1637
1638         case 0:
1639                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1640                         break;
1641                 }
1642                 /* fall thru */
1643
1644         default:
1645                 goto done;
1646         }
1647
1648         /* put controls that go __before__ existing ones here */
1649
1650         /* proxyAuthz for identity assertion */
1651         switch ( mi->mi_ldap_extra->proxy_authz_ctrl( op, rs, &msc->msc_bound_ndn,
1652                 mt->mt_version, &mt->mt_idassert, &c[ j1 ] ) )
1653         {
1654         case SLAP_CB_CONTINUE:
1655                 break;
1656
1657         case LDAP_SUCCESS:
1658                 j1++;
1659                 break;
1660
1661         default:
1662                 goto done;
1663         }
1664
1665         /* put controls that go __after__ existing ones here */
1666
1667 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
1668         /* session tracking */
1669         if ( META_BACK_TGT_ST_REQUEST( mt ) ) {
1670                 switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) {
1671                 case SLAP_CB_CONTINUE:
1672                         break;
1673
1674                 case LDAP_SUCCESS:
1675                         j2++;
1676                         break;
1677
1678                 default:
1679                         goto done;
1680                 }
1681         }
1682 #endif /* SLAP_CONTROL_X_SESSION_TRACKING */
1683
1684         if ( rs->sr_err == SLAP_CB_CONTINUE ) {
1685                 rs->sr_err = LDAP_SUCCESS;
1686         }
1687
1688         /* if nothing to do, just bail out */
1689         if ( j1 == 0 && j2 == 0 ) {
1690                 goto done;
1691         }
1692
1693         assert( j1 + j2 <= (int) (sizeof( c )/sizeof( c[0] )) );
1694
1695         if ( op->o_ctrls ) {
1696                 for ( n = 0; op->o_ctrls[ n ]; n++ )
1697                         /* just count ctrls */ ;
1698         }
1699
1700         ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ),
1701                         op->o_tmpmemctx );
1702         if ( j1 ) {
1703                 ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ];
1704                 *ctrls[ 0 ] = c[ 0 ];
1705                 for ( i = 1; i < j1; i++ ) {
1706                         ctrls[ i ] = &ctrls[ 0 ][ i ];
1707                         *ctrls[ i ] = c[ i ];
1708                 }
1709         }
1710
1711         i = 0;
1712         if ( op->o_ctrls ) {
1713                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1714                         ctrls[ i + j1 ] = op->o_ctrls[ i ];
1715                 }
1716         }
1717
1718         n += j1;
1719         if ( j2 ) {
1720                 ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1;
1721                 *ctrls[ n ] = c[ j1 ];
1722                 for ( i = 1; i < j2; i++ ) {
1723                         ctrls[ n + i ] = &ctrls[ n ][ i ];
1724                         *ctrls[ n + i ] = c[ i ];
1725                 }
1726         }
1727
1728         ctrls[ n + j2 ] = NULL;
1729
1730 done:;
1731         if ( ctrls == NULL ) {
1732                 ctrls = op->o_ctrls;
1733         }
1734
1735         *pctrls = ctrls;
1736
1737         return rs->sr_err;
1738 }
1739