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         static struct berval    cred = BER_BVC( "" );
 590         int                     msgid;
 591
 592         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 593
 594         /* NOTE: this obsoletes pseudorootdn */
 595         if ( op->o_conn != NULL &&
 596                 !op->o_do_not_cache &&
 597                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 598                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 599                         ( LDAP_BACK_CONN_ISPRIV( mc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
 600                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 601         {
 602                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
 603
 604         } else {
 605
 606                 /* FIXME: should we check if at least some of the op->o_ctrls
 607                  * can/should be passed? */
 608                 for (;;) {
 609                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
 610                                 "", LDAP_SASL_SIMPLE, &cred,
 611                                 NULL, NULL, &msgid );
 612                         if ( rs->sr_err != LDAP_X_CONNECTING ) {
 613                                 break;
 614                         }
 615                         ldap_pvt_thread_yield();
 616                 }
 617
 618                 rs->sr_err = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
 619         }
 620
 621         if ( rs->sr_err != LDAP_SUCCESS ) {
 622                 if ( dolock ) {
 623                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 624                 }
 625                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 626                 if ( META_BACK_ONERR_STOP( mi ) ) {
 627                         LDAP_BACK_CONN_TAINTED_SET( mc );
 628                         meta_back_release_conn_lock( mi, mc, 0 );
 629                         *mcp = NULL;
 630                 }
 631                 if ( dolock ) {
 632                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 633                 }
 634         }
 635
 636         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 637                 meta_back_quarantine( op, rs, candidate );
 638         }
 639
 640         return rs->sr_err;
 641 }
 642
 643 /*
 644  * meta_back_dobind
 645  */
 646 int
 647 meta_back_dobind(
 648         Operation               *op,
 649         SlapReply               *rs,
 650         metaconn_t              *mc,
 651         ldap_back_send_t        sendok )
 652 {
 653         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 654
 655         int                     bound = 0,
 656                                 i,
 657                                 isroot = 0;
 658
 659         SlapReply               *candidates;
 660
 661         if ( be_isroot( op ) ) {
 662                 isroot = 1;
 663         }
 664
 665         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 666                 char buf[STRLENOF("4294967295U") + 1] = { 0 };
 667                 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
 668
 669                 Debug( LDAP_DEBUG_TRACE,
 670                         "%s meta_back_dobind: conn=%s%s\n",
 671                         op->o_log_prefix, buf,
 672                         isroot ? " (isroot)" : "" );
 673         }
 674
 675         /*
 676          * all the targets are bound as pseudoroot
 677          */
 678         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 679                 bound = 1;
 680                 goto done;
 681         }
 682
 683         candidates = meta_back_candidates_get( op );
 684
 685         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 686                 metatarget_t            *mt = mi->mi_targets[ i ];
 687                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 688                 int                     rc;
 689
 690                 /*
 691                  * Not a candidate
 692                  */
 693                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 694                         continue;
 695                 }
 696
 697                 assert( msc->msc_ld != NULL );
 698
 699                 /*
 700                  * If the target is already bound it is skipped
 701                  */
 702
 703 retry_binding:;
 704                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 705                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 706                         || ( LDAP_BACK_CONN_ISANON( msc )
 707                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 708                 {
 709                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 710                         ++bound;
 711                         continue;
 712
 713                 } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
 714                 {
 715                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 716                         ldap_pvt_thread_yield();
 717                         goto retry_binding;
 718
 719                 }
 720
 721                 LDAP_BACK_CONN_BINDING_SET( msc );
 722                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 723
 724                 rc = meta_back_single_dobind( op, rs, &mc, i,
 725                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 726                 /*
 727                  * NOTE: meta_back_single_dobind() already retries;
 728                  * in case of failure, it resets mc...
 729                  */
 730                 if ( rc != LDAP_SUCCESS ) {
 731                         char            buf[ SLAP_TEXT_BUFLEN ];
 732
 733                         if ( mc == NULL ) {
 734                                 /* meta_back_single_dobind() already sent
 735                                  * response and released connection */
 736                                 goto send_err;
 737                         }
 738
 739
 740                         if ( rc == LDAP_UNAVAILABLE ) {
 741                                 /* FIXME: meta_back_retry() already re-calls
 742                                  * meta_back_single_dobind() */
 743                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 744                                         goto retry_ok;
 745                                 }
 746
 747                                 if ( mc != NULL ) {
 748                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 749                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 750                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 751                                         meta_back_release_conn( mi, mc );
 752                                 }
 753
 754                                 return 0;
 755                         }
 756
 757                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 758                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 759                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 760
 761                         snprintf( buf, sizeof( buf ),
 762                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 763                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 764                                 rc, ldap_err2string( rc ) );
 765                         Debug( LDAP_DEBUG_ANY,
 766                                 "%s %s\n",
 767                                 op->o_log_prefix, buf, 0 );
 768
 769                         /*
 770                          * null cred bind should always succeed
 771                          * as anonymous, so a failure means
 772                          * the target is no longer candidate possibly
 773                          * due to technical reasons (remote host down?)
 774                          * so better clear the handle
 775                          */
 776                         /* leave the target candidate, but record the error for later use */
 777                         candidates[ i ].sr_err = rc;
 778                         if ( META_BACK_ONERR_STOP( mi ) ) {
 779                                 bound = 0;
 780                                 goto done;
 781                         }
 782
 783                         continue;
 784                 } /* else */
 785
 786 retry_ok:;
 787                 Debug( LDAP_DEBUG_TRACE,
 788                         "%s meta_back_dobind[%d]: "
 789                         "(%s)\n",
 790                         op->o_log_prefix, i,
 791                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 792
 793                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 794                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 795                 if ( isroot ) {
 796                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 797                 } else {
 798                         LDAP_BACK_CONN_ISANON_SET( msc );
 799                 }
 800                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 801                 ++bound;
 802         }
 803
 804 done:;
 805         if ( LogTest( LDAP_DEBUG_TRACE ) ) {
 806                 char buf[STRLENOF("4294967295U") + 1] = { 0 };
 807                 mi->mi_ldap_extra->connid2str( &mc->mc_base, buf, sizeof(buf) );
 808
 809                 Debug( LDAP_DEBUG_TRACE,
 810                         "%s meta_back_dobind: conn=%s bound=%d\n",
 811                         op->o_log_prefix, buf, bound );
 812         }
 813
 814         if ( bound == 0 ) {
 815                 meta_back_release_conn( mi, mc );
 816
 817 send_err:;
 818                 if ( sendok & LDAP_BACK_SENDERR ) {
 819                         if ( rs->sr_err == LDAP_SUCCESS ) {
 820                                 rs->sr_err = LDAP_BUSY;
 821                         }
 822                         send_ldap_result( op, rs );
 823                 }
 824
 825                 return 0;
 826         }
 827
 828         return ( bound > 0 );
 829 }
 830
 831 /*
 832  * meta_back_default_rebind
 833  *
 834  * This is a callback used for chasing referrals using the same
 835  * credentials as the original user on this session.
 836  */
 837 int
 838 meta_back_default_rebind(
 839         LDAP                    *ld,
 840         LDAP_CONST char         *url,
 841         ber_tag_t               request,
 842         ber_int_t               msgid,
 843         void                    *params )
 844 {
 845         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 846
 847         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 848                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 849                         NULL, NULL, NULL );
 850 }
 851
 852 /*
 853  * meta_back_default_urllist
 854  *
 855  * This is a callback used for mucking with the urllist
 856  */
 857 int
 858 meta_back_default_urllist(
 859         LDAP            *ld,
 860         LDAPURLDesc     **urllist,
 861         LDAPURLDesc     **url,
 862         void            *params )
 863 {
 864         metatarget_t    *mt = (metatarget_t *)params;
 865         LDAPURLDesc     **urltail;
 866
 867         if ( urllist == url ) {
 868                 return LDAP_SUCCESS;
 869         }
 870
 871         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 872                 /* count */ ;
 873
 874         *urltail = *urllist;
 875         *urllist = *url;
 876         *url = NULL;
 877
 878         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 879         if ( mt->mt_uri ) {
 880                 ch_free( mt->mt_uri );
 881         }
 882
 883         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 884         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 885
 886         return LDAP_SUCCESS;
 887 }
 888
 889 int
 890 meta_back_cancel(
 891         metaconn_t              *mc,
 892         Operation               *op,
 893         SlapReply               *rs,
 894         ber_int_t               msgid,
 895         int                     candidate,
 896         ldap_back_send_t        sendok )
 897 {
 898         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 899
 900         metatarget_t            *mt = mi->mi_targets[ candidate ];
 901         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 902
 903         int                     rc = LDAP_OTHER;
 904
 905         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 906                 op->o_log_prefix, candidate, msgid );
 907
 908         /* default behavior */
 909         if ( META_BACK_TGT_ABANDON( mt ) ) {
 910                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 911
 912         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 913                 rc = ldap_pvt_discard( msc->msc_ld, msgid );
 914
 915         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 916                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 917
 918         } else {
 919                 assert( 0 );
 920         }
 921
 922         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 923                 op->o_log_prefix, candidate, rc );
 924
 925         return rc;
 926 }
 927
 928
 929
 930 /*
 931  * FIXME: error return must be handled in a cleaner way ...
 932  */
 933 int
 934 meta_back_op_result(
 935         metaconn_t              *mc,
 936         Operation               *op,
 937         SlapReply               *rs,
 938         int                     candidate,
 939         ber_int_t               msgid,
 940         time_t                  timeout,
 941         ldap_back_send_t        sendok )
 942 {
 943         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 944
 945         const char      *save_text = rs->sr_text,
 946                         *save_matched = rs->sr_matched;
 947         BerVarray       save_ref = rs->sr_ref;
 948         LDAPControl     **save_ctrls = rs->sr_ctrls;
 949         void            *matched_ctx = NULL;
 950
 951         char            *matched = NULL;
 952         char            *text = NULL;
 953         char            **refs = NULL;
 954         LDAPControl     **ctrls = NULL;
 955
 956         assert( mc != NULL );
 957
 958         rs->sr_text = NULL;
 959         rs->sr_matched = NULL;
 960         rs->sr_ref = NULL;
 961         rs->sr_ctrls = NULL;
 962
 963         if ( candidate != META_TARGET_NONE ) {
 964                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 965                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 966
 967                 if ( LDAP_ERR_OK( rs->sr_err ) ) {
 968                         int             rc;
 969                         struct timeval  tv;
 970                         LDAPMessage     *res = NULL;
 971                         time_t          stoptime = (time_t)(-1);
 972                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 973                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 974                         const char      *timeout_text = "Operation timed out";
 975
 976                         /* if timeout is not specified, compute and use
 977                          * the one specific to the ongoing operation */
 978                         if ( timeout == (time_t)(-1) ) {
 979                                 slap_op_t       opidx = slap_req2op( op->o_tag );
 980
 981                                 if ( opidx == SLAP_OP_SEARCH ) {
 982                                         if ( op->ors_tlimit <= 0 ) {
 983                                                 timeout = 0;
 984
 985                                         } else {
 986                                                 timeout = op->ors_tlimit;
 987                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 988                                                 timeout_text = NULL;
 989                                         }
 990
 991                                 } else {
 992                                         timeout = mt->mt_timeout[ opidx ];
 993                                 }
 994                         }
 995
 996                         /* better than nothing :) */
 997                         if ( timeout == 0 ) {
 998                                 if ( mi->mi_idle_timeout ) {
 999                                         timeout = mi->mi_idle_timeout;
1000
1001                                 } else if ( mi->mi_conn_ttl ) {
1002                                         timeout = mi->mi_conn_ttl;
1003                                 }
1004                         }
1005
1006                         if ( timeout ) {
1007                                 stoptime = op->o_time + timeout;
1008                         }
1009
1010                         LDAP_BACK_TV_SET( &tv );
1011
1012 retry:;
1013                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1014                         switch ( rc ) {
1015                         case 0:
1016                                 if ( timeout && slap_get_time() > stoptime ) {
1017                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
1018                                         rs->sr_err = timeout_err;
1019                                         rs->sr_text = timeout_text;
1020                                         break;
1021                                 }
1022
1023                                 LDAP_BACK_TV_SET( &tv );
1024                                 ldap_pvt_thread_yield();
1025                                 goto retry;
1026
1027                         case -1:
1028                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
1029                                                 &rs->sr_err );
1030                                 break;
1031
1032
1033                         /* otherwise get the result; if it is not
1034                          * LDAP_SUCCESS, record it in the reply
1035                          * structure (this includes
1036                          * LDAP_COMPARE_{TRUE|FALSE}) */
1037                         default:
1038                                 /* only touch when activity actually took place... */
1039                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
1040                                         msc->msc_time = op->o_time;
1041                                 }
1042
1043                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
1044                                                 &matched, &text, &refs, &ctrls, 1 );
1045                                 res = NULL;
1046                                 if ( rc == LDAP_SUCCESS ) {
1047                                         rs->sr_text = text;
1048                                 } else {
1049                                         rs->sr_err = rc;
1050                                 }
1051                                 rs->sr_err = slap_map_api2result( rs );
1052
1053                                 /* RFC 4511: referrals can only appear
1054                                  * if result code is LDAP_REFERRAL */
1055                                 if ( refs != NULL
1056                                         && refs[ 0 ] != NULL
1057                                         && refs[ 0 ][ 0 ] != '\0' )
1058                                 {
1059                                         if ( rs->sr_err != LDAP_REFERRAL ) {
1060                                                 Debug( LDAP_DEBUG_ANY,
1061                                                         "%s meta_back_op_result[%d]: "
1062                                                         "got referrals with err=%d\n",
1063                                                         op->o_log_prefix,
1064                                                         candidate, rs->sr_err );
1065
1066                                         } else {
1067                                                 int     i;
1068
1069                                                 for ( i = 0; refs[ i ] != NULL; i++ )
1070                                                         /* count */ ;
1071                                                 rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1072                                                         op->o_tmpmemctx );
1073                                                 for ( i = 0; refs[ i ] != NULL; i++ ) {
1074                                                         ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1075                                                 }
1076                                                 BER_BVZERO( &rs->sr_ref[ i ] );
1077                                         }
1078
1079                                 } else if ( rs->sr_err == LDAP_REFERRAL ) {
1080                                         Debug( LDAP_DEBUG_ANY,
1081                                                 "%s meta_back_op_result[%d]: "
1082                                                 "got err=%d with null "
1083                                                 "or empty referrals\n",
1084                                                 op->o_log_prefix,
1085                                                 candidate, rs->sr_err );
1086
1087                                         rs->sr_err = LDAP_NO_SUCH_OBJECT;
1088                                 }
1089
1090                                 if ( ctrls != NULL ) {
1091                                         rs->sr_ctrls = ctrls;
1092                                 }
1093                         }
1094
1095                         assert( res == NULL );
1096                 }
1097
1098                 /* if the error in the reply structure is not
1099                  * LDAP_SUCCESS, try to map it from client
1100                  * to server error */
1101                 if ( !LDAP_ERR_OK( rs->sr_err ) ) {
1102                         rs->sr_err = slap_map_api2result( rs );
1103
1104                         /* internal ops ( op->o_conn == NULL )
1105                          * must not reply to client */
1106                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1107
1108                                 /* record the (massaged) matched
1109                                  * DN into the reply structure */
1110                                 rs->sr_matched = matched;
1111                         }
1112                 }
1113
1114                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1115                         meta_back_quarantine( op, rs, candidate );
1116                 }
1117
1118         } else {
1119                 int     i,
1120                         err = rs->sr_err;
1121
1122                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1123                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1124                         char                    *xtext = NULL;
1125                         char                    *xmatched = NULL;
1126
1127                         rs->sr_err = LDAP_SUCCESS;
1128
1129                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rs->sr_err );
1130                         if ( rs->sr_err != LDAP_SUCCESS ) {
1131                                 /*
1132                                  * better check the type of error. In some cases
1133                                  * (search ?) it might be better to return a
1134                                  * success if at least one of the targets gave
1135                                  * positive result ...
1136                                  */
1137                                 ldap_get_option( msc->msc_ld,
1138                                                 LDAP_OPT_DIAGNOSTIC_MESSAGE, &xtext );
1139                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1140                                         ldap_memfree( xtext );
1141                                         xtext = NULL;
1142                                 }
1143
1144                                 ldap_get_option( msc->msc_ld,
1145                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1146                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1147                                         ldap_memfree( xmatched );
1148                                         xmatched = NULL;
1149                                 }
1150
1151                                 rs->sr_err = slap_map_api2result( rs );
1152
1153                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1154                                         char    buf[ SLAP_TEXT_BUFLEN ];
1155
1156                                         snprintf( buf, sizeof( buf ),
1157                                                 "meta_back_op_result[%d] "
1158                                                 "err=%d text=\"%s\" matched=\"%s\"",
1159                                                 i, rs->sr_err,
1160                                                 ( xtext ? xtext : "" ),
1161                                                 ( xmatched ? xmatched : "" ) );
1162                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1163                                                 op->o_log_prefix, buf, 0 );
1164                                 }
1165
1166                                 /*
1167                                  * FIXME: need to rewrite "match" (need rwinfo)
1168                                  */
1169                                 switch ( rs->sr_err ) {
1170                                 default:
1171                                         err = rs->sr_err;
1172                                         if ( xtext != NULL ) {
1173                                                 if ( text ) {
1174                                                         ldap_memfree( text );
1175                                                 }
1176                                                 text = xtext;
1177                                                 xtext = NULL;
1178                                         }
1179                                         if ( xmatched != NULL ) {
1180                                                 if ( matched ) {
1181                                                         ldap_memfree( matched );
1182                                                 }
1183                                                 matched = xmatched;
1184                                                 xmatched = NULL;
1185                                         }
1186                                         break;
1187                                 }
1188
1189                                 if ( xtext ) {
1190                                         ldap_memfree( xtext );
1191                                 }
1192
1193                                 if ( xmatched ) {
1194                                         ldap_memfree( xmatched );
1195                                 }
1196                         }
1197
1198                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1199                                 meta_back_quarantine( op, rs, i );
1200                         }
1201                 }
1202
1203                 if ( err != LDAP_SUCCESS ) {
1204                         rs->sr_err = err;
1205                 }
1206         }
1207
1208         if ( matched != NULL ) {
1209                 struct berval   dn, pdn;
1210
1211                 ber_str2bv( matched, 0, 0, &dn );
1212                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1213                         ldap_memfree( matched );
1214                         matched_ctx = op->o_tmpmemctx;
1215                         matched = pdn.bv_val;
1216                 }
1217                 rs->sr_matched = matched;
1218         }
1219
1220         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1221                 if ( !( sendok & LDAP_BACK_RETRYING ) ) {
1222                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1223                                 if ( rs->sr_text == NULL ) rs->sr_text = "Proxy operation retry failed";
1224                                 send_ldap_result( op, rs );
1225                         }
1226                 }
1227
1228         } else if ( op->o_conn &&
1229                 ( ( ( sendok & LDAP_BACK_SENDOK ) && LDAP_ERR_OK( rs->sr_err ) )
1230                         || ( ( sendok & LDAP_BACK_SENDERR ) && !LDAP_ERR_OK( rs->sr_err ) ) ) )
1231         {
1232                 send_ldap_result( op, rs );
1233         }
1234         if ( matched ) {
1235                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1236         }
1237         if ( text ) {
1238                 ldap_memfree( text );
1239         }
1240         if ( rs->sr_ref ) {
1241                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1242                 rs->sr_ref = NULL;
1243         }
1244         if ( refs ) {
1245                 ber_memvfree( (void **)refs );
1246         }
1247         if ( ctrls ) {
1248                 assert( rs->sr_ctrls != NULL );
1249                 ldap_controls_free( ctrls );
1250         }
1251
1252         rs->sr_text = save_text;
1253         rs->sr_matched = save_matched;
1254         rs->sr_ref = save_ref;
1255         rs->sr_ctrls = save_ctrls;
1256
1257         return( LDAP_ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1258 }
1259
1260 /*
1261  * meta_back_proxy_authz_cred()
1262  *
1263  * prepares credentials & method for meta_back_proxy_authz_bind();
1264  * or, if method is SASL, performs the SASL bind directly.
1265  */
1266 int
1267 meta_back_proxy_authz_cred(
1268         metaconn_t              *mc,
1269         int                     candidate,
1270         Operation               *op,
1271         SlapReply               *rs,
1272         ldap_back_send_t        sendok,
1273         struct berval           *binddn,
1274         struct berval           *bindcred,
1275         int                     *method )
1276 {
1277         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1278         metatarget_t            *mt = mi->mi_targets[ candidate ];
1279         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1280         struct berval           ndn;
1281         int                     dobind = 0;
1282
1283         /* don't proxyAuthz if protocol is not LDAPv3 */
1284         switch ( mt->mt_version ) {
1285         case LDAP_VERSION3:
1286                 break;
1287
1288         case 0:
1289                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1290                         break;
1291                 }
1292                 /* fall thru */
1293
1294         default:
1295                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1296                 if ( sendok & LDAP_BACK_SENDERR ) {
1297                         send_ldap_result( op, rs );
1298                 }
1299                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1300                 goto done;
1301         }
1302
1303         if ( op->o_tag == LDAP_REQ_BIND ) {
1304                 ndn = op->o_req_ndn;
1305
1306         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1307                 ndn = op->o_conn->c_ndn;
1308
1309         } else {
1310                 ndn = op->o_ndn;
1311         }
1312
1313         /*
1314          * FIXME: we need to let clients use proxyAuthz
1315          * otherwise we cannot do symmetric pools of servers;
1316          * we have to live with the fact that a user can
1317          * authorize itself as any ID that is allowed
1318          * by the authzTo directive of the "proxyauthzdn".
1319          */
1320         /*
1321          * NOTE: current Proxy Authorization specification
1322          * and implementation do not allow proxy authorization
1323          * control to be provided with Bind requests
1324          */
1325         /*
1326          * if no bind took place yet, but the connection is bound
1327          * and the "proxyauthzdn" is set, then bind as
1328          * "proxyauthzdn" and explicitly add the proxyAuthz
1329          * control to every operation with the dn bound
1330          * to the connection as control value.
1331          */
1332
1333         /* bind as proxyauthzdn only if no idassert mode
1334          * is requested, or if the client's identity
1335          * is authorized */
1336         switch ( mt->mt_idassert_mode ) {
1337         case LDAP_BACK_IDASSERT_LEGACY:
1338                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1339                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1340                         {
1341                                 *binddn = mt->mt_idassert_authcDN;
1342                                 *bindcred = mt->mt_idassert_passwd;
1343                                 dobind = 1;
1344                         }
1345                 }
1346                 break;
1347
1348         default:
1349                 /* NOTE: rootdn can always idassert */
1350                 if ( BER_BVISNULL( &ndn )
1351                         && mt->mt_idassert_authz == NULL
1352                         && !( mt->mt_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
1353                 {
1354                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1355                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1356                                 if ( sendok & LDAP_BACK_SENDERR ) {
1357                                         send_ldap_result( op, rs );
1358                                 }
1359                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1360                                 goto done;
1361
1362                         }
1363
1364                         rs->sr_err = LDAP_SUCCESS;
1365                         *binddn = slap_empty_bv;
1366                         *bindcred = slap_empty_bv;
1367                         break;
1368
1369                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1370                         struct berval authcDN;
1371
1372                         if ( BER_BVISNULL( &ndn ) ) {
1373                                 authcDN = slap_empty_bv;
1374
1375                         } else {
1376                                 authcDN = ndn;
1377                         }
1378                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1379                                         &authcDN, &authcDN );
1380                         if ( rs->sr_err != LDAP_SUCCESS ) {
1381                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1382                                         if ( sendok & LDAP_BACK_SENDERR ) {
1383                                                 send_ldap_result( op, rs );
1384                                         }
1385                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1386                                         goto done;
1387                                 }
1388
1389                                 rs->sr_err = LDAP_SUCCESS;
1390                                 *binddn = slap_empty_bv;
1391                                 *bindcred = slap_empty_bv;
1392                                 break;
1393                         }
1394                 }
1395
1396                 *binddn = mt->mt_idassert_authcDN;
1397                 *bindcred = mt->mt_idassert_passwd;
1398                 dobind = 1;
1399                 break;
1400         }
1401
1402         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1403 #ifdef HAVE_CYRUS_SASL
1404                 void            *defaults = NULL;
1405                 struct berval   authzID = BER_BVNULL;
1406                 int             freeauthz = 0;
1407
1408                 /* if SASL supports native authz, prepare for it */
1409                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1410                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1411                 {
1412                         switch ( mt->mt_idassert_mode ) {
1413                         case LDAP_BACK_IDASSERT_OTHERID:
1414                         case LDAP_BACK_IDASSERT_OTHERDN:
1415                                 authzID = mt->mt_idassert_authzID;
1416                                 break;
1417
1418                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1419                                 BER_BVSTR( &authzID, "dn:" );
1420                                 break;
1421
1422                         case LDAP_BACK_IDASSERT_SELF:
1423                                 if ( BER_BVISNULL( &ndn ) ) {
1424                                         /* connection is not authc'd, so don't idassert */
1425                                         BER_BVSTR( &authzID, "dn:" );
1426                                         break;
1427                                 }
1428                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1429                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1430                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1431                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1432                                                 ndn.bv_val, ndn.bv_len + 1 );
1433                                 freeauthz = 1;
1434                                 break;
1435
1436                         default:
1437                                 break;
1438                         }
1439                 }
1440
1441                 if ( mt->mt_idassert_secprops != NULL ) {
1442                         rs->sr_err = ldap_set_option( msc->msc_ld,
1443                                 LDAP_OPT_X_SASL_SECPROPS,
1444                                 (void *)mt->mt_idassert_secprops );
1445
1446                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1447                                 rs->sr_err = LDAP_OTHER;
1448                                 if ( sendok & LDAP_BACK_SENDERR ) {
1449                                         send_ldap_result( op, rs );
1450                                 }
1451                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1452                                 goto done;
1453                         }
1454                 }
1455
1456                 defaults = lutil_sasl_defaults( msc->msc_ld,
1457                                 mt->mt_idassert_sasl_mech.bv_val,
1458                                 mt->mt_idassert_sasl_realm.bv_val,
1459                                 mt->mt_idassert_authcID.bv_val,
1460                                 mt->mt_idassert_passwd.bv_val,
1461                                 authzID.bv_val );
1462                 if ( defaults == NULL ) {
1463                         rs->sr_err = LDAP_OTHER;
1464                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1465                         if ( sendok & LDAP_BACK_SENDERR ) {
1466                                 send_ldap_result( op, rs );
1467                         }
1468                         goto done;
1469                 }
1470
1471                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1472                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1473                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1474                                 defaults );
1475
1476                 rs->sr_err = slap_map_api2result( rs );
1477                 if ( rs->sr_err != LDAP_SUCCESS ) {
1478                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1479                         if ( sendok & LDAP_BACK_SENDERR ) {
1480                                 send_ldap_result( op, rs );
1481                         }
1482
1483                 } else {
1484                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1485                 }
1486
1487                 lutil_sasl_freedefs( defaults );
1488                 if ( freeauthz ) {
1489                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1490                 }
1491
1492                 goto done;
1493 #endif /* HAVE_CYRUS_SASL */
1494         }
1495
1496         *method = mt->mt_idassert_authmethod;
1497         switch ( mt->mt_idassert_authmethod ) {
1498         case LDAP_AUTH_NONE:
1499                 BER_BVSTR( binddn, "" );
1500                 BER_BVSTR( bindcred, "" );
1501                 /* fallthru */
1502
1503         case LDAP_AUTH_SIMPLE:
1504                 break;
1505
1506         default:
1507                 /* unsupported! */
1508                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1509                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1510                 if ( sendok & LDAP_BACK_SENDERR ) {
1511                         send_ldap_result( op, rs );
1512                 }
1513                 break;
1514         }
1515
1516 done:;
1517         return rs->sr_err;
1518 }
1519
1520 static int
1521 meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1522 {
1523         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1524         metatarget_t            *mt = mi->mi_targets[ candidate ];
1525         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1526         struct berval           binddn = BER_BVC( "" ),
1527                                 cred = BER_BVC( "" );
1528         int                     method = LDAP_AUTH_NONE,
1529                                 rc;
1530
1531         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1532         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1533                 int     msgid;
1534
1535                 switch ( method ) {
1536                 case LDAP_AUTH_NONE:
1537                 case LDAP_AUTH_SIMPLE:
1538                         for (;;) {
1539                                 rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1540                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1541                                         &cred, NULL, NULL, &msgid );
1542                                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
1543                                         break;
1544                                 }
1545                                 ldap_pvt_thread_yield();
1546                         }
1547                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
1548                         if ( rc == LDAP_SUCCESS ) {
1549                                 /* set rebind stuff in case of successful proxyAuthz bind,
1550                                  * so that referral chasing is attempted using the right
1551                                  * identity */
1552                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1553                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1554
1555                                 if ( META_BACK_TGT_SAVECRED( mt ) ) {
1556                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1557                                                 memset( msc->msc_cred.bv_val, 0,
1558                                                         msc->msc_cred.bv_len );
1559                                         }
1560                                         ber_bvreplace( &msc->msc_cred, &cred );
1561                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1562                                 }
1563                         }
1564                         break;
1565
1566                 default:
1567                         assert( 0 );
1568                         break;
1569                 }
1570         }
1571
1572         return LDAP_BACK_CONN_ISBOUND( msc );
1573 }
1574
1575 /*
1576  * Add controls;
1577  *
1578  * if any needs to be added, it is prepended to existing ones,
1579  * in a newly allocated array.  The companion function
1580  * mi->mi_ldap_extra->controls_free() must be used to restore the original
1581  * status of op->o_ctrls.
1582  */
1583 int
1584 meta_back_controls_add(
1585                 Operation       *op,
1586                 SlapReply       *rs,
1587                 metaconn_t      *mc,
1588                 int             candidate,
1589                 LDAPControl     ***pctrls )
1590 {
1591         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1592         metatarget_t            *mt = mi->mi_targets[ candidate ];
1593         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1594
1595         LDAPControl             **ctrls = NULL;
1596         /* set to the maximum number of controls this backend can add */
1597         LDAPControl             c[ 2 ] = {{ 0 }};
1598         int                     n = 0, i, j1 = 0, j2 = 0;
1599
1600         *pctrls = NULL;
1601
1602         rs->sr_err = LDAP_SUCCESS;
1603
1604         /* don't add controls if protocol is not LDAPv3 */
1605         switch ( mt->mt_version ) {
1606         case LDAP_VERSION3:
1607                 break;
1608
1609         case 0:
1610                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1611                         break;
1612                 }
1613                 /* fall thru */
1614
1615         default:
1616                 goto done;
1617         }
1618
1619         /* put controls that go __before__ existing ones here */
1620
1621         /* proxyAuthz for identity assertion */
1622         switch ( mi->mi_ldap_extra->proxy_authz_ctrl( op, rs, &msc->msc_bound_ndn,
1623                 mt->mt_version, &mt->mt_idassert, &c[ j1 ] ) )
1624         {
1625         case SLAP_CB_CONTINUE:
1626                 break;
1627
1628         case LDAP_SUCCESS:
1629                 j1++;
1630                 break;
1631
1632         default:
1633                 goto done;
1634         }
1635
1636         /* put controls that go __after__ existing ones here */
1637
1638 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
1639         /* session tracking */
1640         if ( META_BACK_TGT_ST_REQUEST( mt ) ) {
1641                 switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) {
1642                 case SLAP_CB_CONTINUE:
1643                         break;
1644
1645                 case LDAP_SUCCESS:
1646                         j2++;
1647                         break;
1648
1649                 default:
1650                         goto done;
1651                 }
1652         }
1653 #endif /* SLAP_CONTROL_X_SESSION_TRACKING */
1654
1655         if ( rs->sr_err == SLAP_CB_CONTINUE ) {
1656                 rs->sr_err = LDAP_SUCCESS;
1657         }
1658
1659         /* if nothing to do, just bail out */
1660         if ( j1 == 0 && j2 == 0 ) {
1661                 goto done;
1662         }
1663
1664         assert( j1 + j2 <= (int) (sizeof( c )/sizeof( c[0] )) );
1665
1666         if ( op->o_ctrls ) {
1667                 for ( n = 0; op->o_ctrls[ n ]; n++ )
1668                         /* just count ctrls */ ;
1669         }
1670
1671         ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ),
1672                         op->o_tmpmemctx );
1673         if ( j1 ) {
1674                 ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ];
1675                 *ctrls[ 0 ] = c[ 0 ];
1676                 for ( i = 1; i < j1; i++ ) {
1677                         ctrls[ i ] = &ctrls[ 0 ][ i ];
1678                         *ctrls[ i ] = c[ i ];
1679                 }
1680         }
1681
1682         i = 0;
1683         if ( op->o_ctrls ) {
1684                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1685                         ctrls[ i + j1 ] = op->o_ctrls[ i ];
1686                 }
1687         }
1688
1689         n += j1;
1690         if ( j2 ) {
1691                 ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1;
1692                 *ctrls[ n ] = c[ j1 ];
1693                 for ( i = 1; i < j2; i++ ) {
1694                         ctrls[ n + i ] = &ctrls[ n ][ i ];
1695                         *ctrls[ n + i ] = c[ i ];
1696                 }
1697         }
1698
1699         ctrls[ n + j2 ] = NULL;
1700
1701 done:;
1702         if ( ctrls == NULL ) {
1703                 ctrls = op->o_ctrls;
1704         }
1705
1706         *pctrls = ctrls;
1707
1708         return rs->sr_err;
1709 }
1710