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 1999-2007 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 == 0 ) {
 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                         /* Mark the meta_conn struct as tainted so
 193                          * it'll be freed by meta_conn_back_destroy below */
 194                         LDAP_BACK_CONN_TAINTED_SET( mc );
 195
 196                         /* FIXME: in some cases (e.g. unavailable)
 197                          * do not assume it's not candidate; rather
 198                          * mark this as an error to be eventually
 199                          * reported to client */
 200                         META_CANDIDATE_CLEAR( &candidates[ i ] );
 201                         break;
 202                 }
 203         }
 204
 205         /* must re-insert if local DN changed as result of bind */
 206         if ( rc == LDAP_SUCCESS ) {
 207                 if ( isroot ) {
 208                         mc->mc_authz_target = META_BOUND_ALL;
 209                 }
 210
 211                 if ( !LDAP_BACK_PCONN_ISPRIV( mc )
 212                         && !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) )
 213                 {
 214                         metaconn_t      *tmpmc;
 215                         int             lerr;
 216
 217                         /* wait for all other ops to release the connection */
 218 retry_lock:;
 219                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 220                         if ( mc->mc_refcnt > 1 ) {
 221                                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 222                                 ldap_pvt_thread_yield();
 223                                 goto retry_lock;
 224                         }
 225
 226                         assert( mc->mc_refcnt == 1 );
 227 #if META_BACK_PRINT_CONNTREE > 0
 228                         meta_back_print_conntree( mi, ">>> meta_back_bind" );
 229 #endif /* META_BACK_PRINT_CONNTREE */
 230                         tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 231                                 meta_back_conndn_cmp );
 232                         assert( tmpmc == mc );
 233
 234                         /* delete all cached connections with the current connection */
 235                         if ( LDAP_BACK_SINGLECONN( mi ) ) {
 236                                 while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
 237                                 {
 238                                         Debug( LDAP_DEBUG_TRACE,
 239                                                 "=>meta_back_bind: destroying conn %ld (refcnt=%u)\n",
 240                                                 LDAP_BACK_PCONN_ID( mc ), mc->mc_refcnt, 0 );
 241
 242                                         if ( tmpmc->mc_refcnt != 0 ) {
 243                                                 /* taint it */
 244                                                 LDAP_BACK_CONN_TAINTED_SET( tmpmc );
 245
 246                                         } else {
 247                                                 /*
 248                                                  * Needs a test because the handler may be corrupted,
 249                                                  * and calling ldap_unbind on a corrupted header results
 250                                                  * in a segmentation fault
 251                                                  */
 252                                                 meta_back_conn_free( tmpmc );
 253                                         }
 254                                 }
 255                         }
 256
 257                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 258                         if ( isroot ) {
 259                                 LDAP_BACK_CONN_ISPRIV_SET( mc );
 260                                 LDAP_BACK_PCONN_SET( mc, op );
 261                         }
 262                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 263                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 264 #if META_BACK_PRINT_CONNTREE > 0
 265                         meta_back_print_conntree( mi, "<<< meta_back_bind" );
 266 #endif /* META_BACK_PRINT_CONNTREE */
 267                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 268                         if ( lerr == -1 ) {
 269                                 /* we can do this because mc_refcnt == 1 */
 270                                 assert( mc->mc_refcnt == 1 );
 271                                 mc->mc_refcnt = 0;
 272                                 meta_back_conn_free( mc );
 273                                 mc = NULL;
 274                         }
 275                 }
 276         }
 277
 278         if ( mc != NULL ) {
 279                 meta_back_release_conn( mi, mc );
 280         }
 281
 282         /*
 283          * rc is LDAP_SUCCESS if at least one bind succeeded,
 284          * err is the last error that occurred during a bind;
 285          * if at least (and at most?) one bind succeeds, fine.
 286          */
 287         if ( rc != LDAP_SUCCESS ) {
 288
 289                 /*
 290                  * deal with bind failure ...
 291                  */
 292
 293                 /*
 294                  * no target was found within the naming context,
 295                  * so bind must fail with invalid credentials
 296                  */
 297                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 298                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 299                 } else {
 300                         rs->sr_err = slap_map_api2result( rs );
 301                 }
 302                 send_ldap_result( op, rs );
 303                 return rs->sr_err;
 304
 305         }
 306
 307         return LDAP_SUCCESS;
 308 }
 309
 310 static int
 311 meta_back_bind_op_result(
 312         Operation               *op,
 313         SlapReply               *rs,
 314         metaconn_t              *mc,
 315         int                     candidate,
 316         int                     msgid,
 317         ldap_back_send_t        sendok )
 318 {
 319         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 320         metatarget_t            *mt = mi->mi_targets[ candidate ];
 321         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 322         LDAPMessage             *res;
 323         struct timeval          tv;
 324         int                     rc;
 325         int                     nretries = mt->mt_nretries;
 326         char                    buf[ SLAP_TEXT_BUFLEN ];
 327
 328         Debug( LDAP_DEBUG_TRACE,
 329                 ">>> %s meta_back_bind_op_result[%d]\n",
 330                 op->o_log_prefix, candidate, 0 );
 331
 332         /* make sure this is clean */
 333         assert( rs->sr_ctrls == NULL );
 334
 335         if ( rs->sr_err == LDAP_SUCCESS ) {
 336                 time_t          stoptime = (time_t)(-1),
 337                                 timeout;
 338                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 339                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 340                 const char      *timeout_text = "Operation timed out";
 341                 slap_op_t       opidx = slap_req2op( op->o_tag );
 342
 343                 /* since timeout is not specified, compute and use
 344                  * the one specific to the ongoing operation */
 345                 if ( opidx == LDAP_REQ_SEARCH ) {
 346                         if ( op->ors_tlimit <= 0 ) {
 347                                 timeout = 0;
 348
 349                         } else {
 350                                 timeout = op->ors_tlimit;
 351                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 352                                 timeout_text = NULL;
 353                         }
 354
 355                 } else {
 356                         timeout = mt->mt_timeout[ opidx ];
 357                 }
 358
 359                 /* better than nothing :) */
 360                 if ( timeout == 0 ) {
 361                         if ( mi->mi_idle_timeout ) {
 362                                 timeout = mi->mi_idle_timeout;
 363
 364                         } else if ( mi->mi_conn_ttl ) {
 365                                 timeout = mi->mi_conn_ttl;
 366                         }
 367                 }
 368
 369                 if ( timeout ) {
 370                         stoptime = op->o_time + timeout;
 371                 }
 372
 373                 LDAP_BACK_TV_SET( &tv );
 374
 375                 /*
 376                  * handle response!!!
 377                  */
 378 retry:;
 379                 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 380                 switch ( rc ) {
 381                 case 0:
 382                         if ( nretries != META_RETRY_NEVER
 383                                 || ( timeout && slap_get_time() <= stoptime ) )
 384                         {
 385                                 ldap_pvt_thread_yield();
 386                                 if ( nretries > 0 ) {
 387                                         nretries--;
 388                                 }
 389                                 tv = mt->mt_bind_timeout;
 390                                 goto retry;
 391                         }
 392
 393                         /* don't let anyone else use this handler,
 394                          * because there's a pending bind that will not
 395                          * be acknowledged */
 396                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 397                         assert( LDAP_BACK_CONN_BINDING( msc ) );
 398
 399 #ifdef DEBUG_205
 400                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_bind_op_result ldap_unbind_ext[%d] ld=%p\n",
 401                                 op->o_log_prefix, candidate, (void *)msc->msc_ld );
 402 #endif /* DEBUG_205 */
 403
 404                         meta_clear_one_candidate( op, mc, candidate );
 405                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 406
 407                         rs->sr_err = timeout_err;
 408                         rs->sr_text = timeout_text;
 409                         break;
 410
 411                 case -1:
 412                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 413                                 &rs->sr_err );
 414
 415                         snprintf( buf, sizeof( buf ),
 416                                 "err=%d (%s) nretries=%d",
 417                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 418                         Debug( LDAP_DEBUG_ANY,
 419                                 "### %s meta_back_bind_op_result[%d]: %s.\n",
 420                                 op->o_log_prefix, candidate, buf );
 421                         break;
 422
 423                 default:
 424                         /* only touch when activity actually took place... */
 425                         if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 426                                 msc->msc_time = op->o_time;
 427                         }
 428
 429                         /* FIXME: matched? referrals? response controls? */
 430                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 431                                         NULL, NULL, NULL, NULL, 1 );
 432                         if ( rc != LDAP_SUCCESS ) {
 433                                 rs->sr_err = rc;
 434                         }
 435                         break;
 436                 }
 437         }
 438
 439         rs->sr_err = slap_map_api2result( rs );
 440
 441         Debug( LDAP_DEBUG_TRACE,
 442                 "<<< %s meta_back_bind_op_result[%d] err=%d\n",
 443                 op->o_log_prefix, candidate, rs->sr_err );
 444
 445         return rs->sr_err;
 446 }
 447
 448 /*
 449  * meta_back_single_bind
 450  *
 451  * attempts to perform a bind with creds
 452  */
 453 static int
 454 meta_back_single_bind(
 455         Operation               *op,
 456         SlapReply               *rs,
 457         metaconn_t              *mc,
 458         int                     candidate )
 459 {
 460         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 461         metatarget_t            *mt = mi->mi_targets[ candidate ];
 462         struct berval           mdn = BER_BVNULL;
 463         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 464         int                     msgid;
 465         dncookie                dc;
 466         struct berval           save_o_dn;
 467         int                     save_o_do_not_cache;
 468         LDAPControl             **ctrls = NULL;
 469
 470         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 471                 ch_free( msc->msc_bound_ndn.bv_val );
 472                 BER_BVZERO( &msc->msc_bound_ndn );
 473         }
 474
 475         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 476                 /* destroy sensitive data */
 477                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 478                 ch_free( msc->msc_cred.bv_val );
 479                 BER_BVZERO( &msc->msc_cred );
 480         }
 481
 482         /*
 483          * Rewrite the bind dn if needed
 484          */
 485         dc.target = mt;
 486         dc.conn = op->o_conn;
 487         dc.rs = rs;
 488         dc.ctx = "bindDN";
 489
 490         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 491                 rs->sr_text = "DN rewrite error";
 492                 rs->sr_err = LDAP_OTHER;
 493                 return rs->sr_err;
 494         }
 495
 496         /* don't add proxyAuthz; set the bindDN */
 497         save_o_dn = op->o_dn;
 498         save_o_do_not_cache = op->o_do_not_cache;
 499         op->o_do_not_cache = 1;
 500         op->o_dn = op->o_req_dn;
 501
 502         ctrls = op->o_ctrls;
 503         rs->sr_err = meta_back_controls_add( op, rs, mc, candidate, &ctrls );
 504         op->o_dn = save_o_dn;
 505         op->o_do_not_cache = save_o_do_not_cache;
 506         if ( rs->sr_err != LDAP_SUCCESS ) {
 507                 goto return_results;
 508         }
 509
 510         /* FIXME: this fixes the bind problem right now; we need
 511          * to use the asynchronous version to get the "matched"
 512          * and more in case of failure ... */
 513         /* FIXME: should we check if at least some of the op->o_ctrls
 514          * can/should be passed? */
 515         for (;;) {
 516                 rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 517                         LDAP_SASL_SIMPLE, &op->orb_cred,
 518                         ctrls, NULL, &msgid );
 519                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
 520                         break;
 521                 }
 522                 ldap_pvt_thread_yield();
 523         }
 524
 525         ldap_back_controls_free( op, rs, &ctrls );
 526
 527         meta_back_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND );
 528         if ( rs->sr_err != LDAP_SUCCESS ) {
 529                 goto return_results;
 530         }
 531
 532         /* If defined, proxyAuthz will be used also when
 533          * back-ldap is the authorizing backend; for this
 534          * purpose, a successful bind is followed by a
 535          * bind with the configured identity assertion */
 536         /* NOTE: use with care */
 537         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 538                 meta_back_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR );
 539                 if ( !LDAP_BACK_CONN_ISBOUND( msc ) ) {
 540                         goto return_results;
 541                 }
 542                 goto cache_refresh;
 543         }
 544
 545         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_ndn );
 546         LDAP_BACK_CONN_ISBOUND_SET( msc );
 547         mc->mc_authz_target = candidate;
 548
 549         if ( LDAP_BACK_SAVECRED( mi ) ) {
 550                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 551                         memset( msc->msc_cred.bv_val, 0,
 552                                 msc->msc_cred.bv_len );
 553                 }
 554                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 555                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 556         }
 557
 558 cache_refresh:;
 559         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 560                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 561         {
 562                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 563                                 &op->o_req_ndn, candidate );
 564         }
 565
 566 return_results:;
 567         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 568                 free( mdn.bv_val );
 569         }
 570
 571         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 572                 meta_back_quarantine( op, rs, candidate );
 573         }
 574
 575         return rs->sr_err;
 576 }
 577
 578 /*
 579  * meta_back_single_dobind
 580  */
 581 int
 582 meta_back_single_dobind(
 583         Operation               *op,
 584         SlapReply               *rs,
 585         metaconn_t              **mcp,
 586         int                     candidate,
 587         ldap_back_send_t        sendok,
 588         int                     nretries,
 589         int                     dolock )
 590 {
 591         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 592         metatarget_t            *mt = mi->mi_targets[ candidate ];
 593         metaconn_t              *mc = *mcp;
 594         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 595         static struct berval    cred = BER_BVC( "" );
 596         int                     msgid;
 597
 598         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 599
 600         /* NOTE: this obsoletes pseudorootdn */
 601         if ( op->o_conn != NULL &&
 602                 !op->o_do_not_cache &&
 603                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 604                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 605                         ( LDAP_BACK_CONN_ISPRIV( mc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
 606                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 607         {
 608                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
 609
 610         } else {
 611
 612                 /* FIXME: should we check if at least some of the op->o_ctrls
 613                  * can/should be passed? */
 614                 for (;;) {
 615                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
 616                                 "", LDAP_SASL_SIMPLE, &cred,
 617                                 NULL, NULL, &msgid );
 618                         if ( rs->sr_err != LDAP_X_CONNECTING ) {
 619                                 break;
 620                         }
 621                         ldap_pvt_thread_yield();
 622                 }
 623
 624                 rs->sr_err = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
 625         }
 626
 627         if ( rs->sr_err != LDAP_SUCCESS ) {
 628                 if ( dolock ) {
 629                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 630                 }
 631                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 632                 if ( META_BACK_ONERR_STOP( mi ) ) {
 633                         LDAP_BACK_CONN_TAINTED_SET( mc );
 634                         meta_back_release_conn_lock( mi, mc, 0 );
 635                         *mcp = NULL;
 636                 }
 637                 if ( dolock ) {
 638                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 639                 }
 640         }
 641
 642         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 643                 meta_back_quarantine( op, rs, candidate );
 644         }
 645
 646         return rs->sr_err;
 647 }
 648
 649 /*
 650  * meta_back_dobind
 651  */
 652 int
 653 meta_back_dobind(
 654         Operation               *op,
 655         SlapReply               *rs,
 656         metaconn_t              *mc,
 657         ldap_back_send_t        sendok )
 658 {
 659         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 660
 661         int                     bound = 0,
 662                                 i,
 663                                 isroot = 0;
 664
 665         SlapReply               *candidates;
 666
 667         if ( be_isroot( op ) ) {
 668                 isroot = 1;
 669         }
 670
 671         Debug( LDAP_DEBUG_TRACE,
 672                 "%s meta_back_dobind: conn=%ld%s\n",
 673                 op->o_log_prefix,
 674                 LDAP_BACK_PCONN_ID( mc ),
 675                 isroot ? " (isroot)" : "" );
 676
 677         /*
 678          * all the targets are bound as pseudoroot
 679          */
 680         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 681                 bound = 1;
 682                 goto done;
 683         }
 684
 685         candidates = meta_back_candidates_get( op );
 686
 687         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 688                 metatarget_t            *mt = mi->mi_targets[ i ];
 689                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 690                 int                     rc;
 691
 692                 /*
 693                  * Not a candidate
 694                  */
 695                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 696                         continue;
 697                 }
 698
 699                 assert( msc->msc_ld != NULL );
 700
 701                 /*
 702                  * If the target is already bound it is skipped
 703                  */
 704
 705 retry_binding:;
 706                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 707                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 708                         || ( LDAP_BACK_CONN_ISANON( msc )
 709                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 710                 {
 711                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 712                         ++bound;
 713                         continue;
 714
 715                 } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
 716                 {
 717                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 718                         ldap_pvt_thread_yield();
 719                         goto retry_binding;
 720
 721                 }
 722
 723                 LDAP_BACK_CONN_BINDING_SET( msc );
 724                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 725
 726                 rc = meta_back_single_dobind( op, rs, &mc, i,
 727                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 728                 /*
 729                  * NOTE: meta_back_single_dobind() already retries;
 730                  * in case of failure, it resets mc...
 731                  */
 732                 if ( rc != LDAP_SUCCESS ) {
 733                         char            buf[ SLAP_TEXT_BUFLEN ];
 734
 735                         if ( mc == NULL ) {
 736                                 /* meta_back_single_dobind() already sent
 737                                  * response and released connection */
 738                                 goto send_err;
 739                         }
 740
 741
 742                         if ( rc == LDAP_UNAVAILABLE ) {
 743                                 /* FIXME: meta_back_retry() already re-calls
 744                                  * meta_back_single_dobind() */
 745                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 746                                         goto retry_ok;
 747                                 }
 748
 749                                 if ( mc != NULL ) {
 750                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 751                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 752                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 753                                         meta_back_release_conn( mi, mc );
 754                                 }
 755
 756                                 return 0;
 757                         }
 758
 759                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 760                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 761                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 762
 763                         snprintf( buf, sizeof( buf ),
 764                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 765                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 766                                 rc, ldap_err2string( rc ) );
 767                         Debug( LDAP_DEBUG_ANY,
 768                                 "%s %s\n",
 769                                 op->o_log_prefix, buf, 0 );
 770
 771                         /*
 772                          * null cred bind should always succeed
 773                          * as anonymous, so a failure means
 774                          * the target is no longer candidate possibly
 775                          * due to technical reasons (remote host down?)
 776                          * so better clear the handle
 777                          */
 778                         /* leave the target candidate, but record the error for later use */
 779                         candidates[ i ].sr_err = rc;
 780                         if ( META_BACK_ONERR_STOP( mi ) ) {
 781                                 bound = 0;
 782                                 goto done;
 783                         }
 784
 785                         continue;
 786                 } /* else */
 787
 788 retry_ok:;
 789                 Debug( LDAP_DEBUG_TRACE,
 790                         "%s meta_back_dobind[%d]: "
 791                         "(%s)\n",
 792                         op->o_log_prefix, i,
 793                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 794
 795                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 796                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 797                 if ( isroot ) {
 798                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 799                 } else {
 800                         LDAP_BACK_CONN_ISANON_SET( msc );
 801                 }
 802                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 803                 ++bound;
 804         }
 805
 806 done:;
 807         Debug( LDAP_DEBUG_TRACE,
 808                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 809                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc ), bound );
 810
 811         if ( bound == 0 ) {
 812                 meta_back_release_conn( mi, mc );
 813
 814 send_err:;
 815                 if ( sendok & LDAP_BACK_SENDERR ) {
 816                         if ( rs->sr_err == LDAP_SUCCESS ) {
 817                                 rs->sr_err = LDAP_BUSY;
 818                         }
 819                         send_ldap_result( op, rs );
 820                 }
 821
 822                 return 0;
 823         }
 824
 825         return ( bound > 0 );
 826 }
 827
 828 /*
 829  * meta_back_default_rebind
 830  *
 831  * This is a callback used for chasing referrals using the same
 832  * credentials as the original user on this session.
 833  */
 834 int
 835 meta_back_default_rebind(
 836         LDAP                    *ld,
 837         LDAP_CONST char         *url,
 838         ber_tag_t               request,
 839         ber_int_t               msgid,
 840         void                    *params )
 841 {
 842         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 843
 844         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 845                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 846                         NULL, NULL, NULL );
 847 }
 848
 849 /*
 850  * meta_back_default_urllist
 851  *
 852  * This is a callback used for mucking with the urllist
 853  */
 854 int
 855 meta_back_default_urllist(
 856         LDAP            *ld,
 857         LDAPURLDesc     **urllist,
 858         LDAPURLDesc     **url,
 859         void            *params )
 860 {
 861         metatarget_t    *mt = (metatarget_t *)params;
 862         LDAPURLDesc     **urltail;
 863
 864         if ( urllist == url ) {
 865                 return LDAP_SUCCESS;
 866         }
 867
 868         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 869                 /* count */ ;
 870
 871         *urltail = *urllist;
 872         *urllist = *url;
 873         *url = NULL;
 874
 875         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 876         if ( mt->mt_uri ) {
 877                 ch_free( mt->mt_uri );
 878         }
 879
 880         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 881         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 882
 883         return LDAP_SUCCESS;
 884 }
 885
 886 int
 887 meta_back_cancel(
 888         metaconn_t              *mc,
 889         Operation               *op,
 890         SlapReply               *rs,
 891         ber_int_t               msgid,
 892         int                     candidate,
 893         ldap_back_send_t        sendok )
 894 {
 895         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 896
 897         metatarget_t            *mt = mi->mi_targets[ candidate ];
 898         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 899
 900         int                     rc = LDAP_OTHER;
 901
 902         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 903                 op->o_log_prefix, candidate, msgid );
 904
 905         /* default behavior */
 906         if ( META_BACK_TGT_ABANDON( mt ) ) {
 907                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 908
 909         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 910                 rc = ldap_pvt_discard( msc->msc_ld, msgid );
 911
 912         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 913                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 914
 915         } else {
 916                 assert( 0 );
 917         }
 918
 919         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 920                 op->o_log_prefix, candidate, rc );
 921
 922         return rc;
 923 }
 924
 925
 926
 927 /*
 928  * FIXME: error return must be handled in a cleaner way ...
 929  */
 930 int
 931 meta_back_op_result(
 932         metaconn_t              *mc,
 933         Operation               *op,
 934         SlapReply               *rs,
 935         int                     candidate,
 936         ber_int_t               msgid,
 937         time_t                  timeout,
 938         ldap_back_send_t        sendok )
 939 {
 940         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 941
 942         const char      *save_text = rs->sr_text,
 943                         *save_matched = rs->sr_matched;
 944         BerVarray       save_ref = rs->sr_ref;
 945         LDAPControl     **save_ctrls = rs->sr_ctrls;
 946         void            *matched_ctx = NULL;
 947
 948         char            *matched = NULL;
 949         char            *text = NULL;
 950         char            **refs = NULL;
 951         LDAPControl     **ctrls = NULL;
 952
 953         assert( mc != NULL );
 954
 955         rs->sr_text = NULL;
 956         rs->sr_matched = NULL;
 957         rs->sr_ref = NULL;
 958         rs->sr_ctrls = NULL;
 959
 960         if ( candidate != META_TARGET_NONE ) {
 961                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 962                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 963
 964 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
 965
 966                 if ( ERR_OK( rs->sr_err ) ) {
 967                         int             rc;
 968                         struct timeval  tv;
 969                         LDAPMessage     *res = NULL;
 970                         time_t          stoptime = (time_t)(-1);
 971                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 972                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 973                         const char      *timeout_text = "Operation timed out";
 974
 975                         /* if timeout is not specified, compute and use
 976                          * the one specific to the ongoing operation */
 977                         if ( timeout == (time_t)(-1) ) {
 978                                 slap_op_t       opidx = slap_req2op( op->o_tag );
 979
 980                                 if ( opidx == SLAP_OP_SEARCH ) {
 981                                         if ( op->ors_tlimit <= 0 ) {
 982                                                 timeout = 0;
 983
 984                                         } else {
 985                                                 timeout = op->ors_tlimit;
 986                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 987                                                 timeout_text = NULL;
 988                                         }
 989
 990                                 } else {
 991                                         timeout = mt->mt_timeout[ opidx ];
 992                                 }
 993                         }
 994
 995                         /* better than nothing :) */
 996                         if ( timeout == 0 ) {
 997                                 if ( mi->mi_idle_timeout ) {
 998                                         timeout = mi->mi_idle_timeout;
 999
1000                                 } else if ( mi->mi_conn_ttl ) {
1001                                         timeout = mi->mi_conn_ttl;
1002                                 }
1003                         }
1004
1005                         if ( timeout ) {
1006                                 stoptime = op->o_time + timeout;
1007                         }
1008
1009                         LDAP_BACK_TV_SET( &tv );
1010
1011 retry:;
1012                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1013                         switch ( rc ) {
1014                         case 0:
1015                                 if ( timeout && slap_get_time() > stoptime ) {
1016                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
1017                                         rs->sr_err = timeout_err;
1018                                         rs->sr_text = timeout_text;
1019                                         break;
1020                                 }
1021
1022                                 LDAP_BACK_TV_SET( &tv );
1023                                 ldap_pvt_thread_yield();
1024                                 goto retry;
1025
1026                         case -1:
1027                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
1028                                                 &rs->sr_err );
1029                                 break;
1030
1031
1032                         /* otherwise get the result; if it is not
1033                          * LDAP_SUCCESS, record it in the reply
1034                          * structure (this includes
1035                          * LDAP_COMPARE_{TRUE|FALSE}) */
1036                         default:
1037                                 /* only touch when activity actually took place... */
1038                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
1039                                         msc->msc_time = op->o_time;
1040                                 }
1041
1042                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
1043                                                 &matched, &text, &refs, &ctrls, 1 );
1044                                 res = NULL;
1045                                 rs->sr_text = text;
1046                                 if ( rc != LDAP_SUCCESS ) {
1047                                         rs->sr_err = rc;
1048                                 }
1049
1050                                 /* RFC 4511: referrals can only appear
1051                                  * if result code is LDAP_REFERRAL */
1052                                 if ( refs != NULL
1053                                         && refs[ 0 ] != NULL
1054                                         && refs[ 0 ][ 0 ] != '\0' )
1055                                 {
1056                                         if ( rs->sr_err != LDAP_REFERRAL ) {
1057                                                 Debug( LDAP_DEBUG_ANY,
1058                                                         "%s meta_back_op_result[%d]: "
1059                                                         "got referrals with err=%d\n",
1060                                                         op->o_log_prefix,
1061                                                         candidate, rs->sr_err );
1062
1063                                         } else {
1064                                                 int     i;
1065
1066                                                 for ( i = 0; refs[ i ] != NULL; i++ )
1067                                                         /* count */ ;
1068                                                 rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1069                                                         op->o_tmpmemctx );
1070                                                 for ( i = 0; refs[ i ] != NULL; i++ ) {
1071                                                         ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1072                                                 }
1073                                                 BER_BVZERO( &rs->sr_ref[ i ] );
1074                                         }
1075
1076                                 } else if ( rs->sr_err == LDAP_REFERRAL ) {
1077                                         Debug( LDAP_DEBUG_ANY,
1078                                                 "%s meta_back_op_result[%d]: "
1079                                                 "got err=%d with null "
1080                                                 "or empty referrals\n",
1081                                                 op->o_log_prefix,
1082                                                 candidate, rs->sr_err );
1083
1084                                         rs->sr_err = LDAP_NO_SUCH_OBJECT;
1085                                 }
1086
1087                                 if ( ctrls != NULL ) {
1088                                         rs->sr_ctrls = ctrls;
1089                                 }
1090                         }
1091
1092                         assert( res == NULL );
1093                 }
1094
1095                 /* if the error in the reply structure is not
1096                  * LDAP_SUCCESS, try to map it from client
1097                  * to server error */
1098                 if ( !ERR_OK( rs->sr_err ) ) {
1099                         rs->sr_err = slap_map_api2result( rs );
1100
1101                         /* internal ops ( op->o_conn == NULL )
1102                          * must not reply to client */
1103                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1104
1105                                 /* record the (massaged) matched
1106                                  * DN into the reply structure */
1107                                 rs->sr_matched = matched;
1108                         }
1109                 }
1110
1111                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1112                         meta_back_quarantine( op, rs, candidate );
1113                 }
1114
1115         } else {
1116                 int     i,
1117                         err = rs->sr_err;
1118
1119                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1120                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1121                         char                    *xtext = NULL;
1122                         char                    *xmatched = NULL;
1123
1124                         rs->sr_err = LDAP_SUCCESS;
1125
1126                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rs->sr_err );
1127                         if ( rs->sr_err != LDAP_SUCCESS ) {
1128                                 /*
1129                                  * better check the type of error. In some cases
1130                                  * (search ?) it might be better to return a
1131                                  * success if at least one of the targets gave
1132                                  * positive result ...
1133                                  */
1134                                 ldap_get_option( msc->msc_ld,
1135                                                 LDAP_OPT_DIAGNOSTIC_MESSAGE, &xtext );
1136                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1137                                         ldap_memfree( xtext );
1138                                         xtext = NULL;
1139                                 }
1140
1141                                 ldap_get_option( msc->msc_ld,
1142                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1143                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1144                                         ldap_memfree( xmatched );
1145                                         xmatched = NULL;
1146                                 }
1147
1148                                 rs->sr_err = slap_map_api2result( rs );
1149
1150                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1151                                         char    buf[ SLAP_TEXT_BUFLEN ];
1152
1153                                         snprintf( buf, sizeof( buf ),
1154                                                 "meta_back_op_result[%d] "
1155                                                 "err=%d text=\"%s\" matched=\"%s\"",
1156                                                 i, rs->sr_err,
1157                                                 ( xtext ? xtext : "" ),
1158                                                 ( xmatched ? xmatched : "" ) );
1159                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1160                                                 op->o_log_prefix, buf, 0 );
1161                                 }
1162
1163                                 /*
1164                                  * FIXME: need to rewrite "match" (need rwinfo)
1165                                  */
1166                                 switch ( rs->sr_err ) {
1167                                 default:
1168                                         err = rs->sr_err;
1169                                         if ( xtext != NULL ) {
1170                                                 if ( text ) {
1171                                                         ldap_memfree( text );
1172                                                 }
1173                                                 text = xtext;
1174                                                 xtext = NULL;
1175                                         }
1176                                         if ( xmatched != NULL ) {
1177                                                 if ( matched ) {
1178                                                         ldap_memfree( matched );
1179                                                 }
1180                                                 matched = xmatched;
1181                                                 xmatched = NULL;
1182                                         }
1183                                         break;
1184                                 }
1185
1186                                 if ( xtext ) {
1187                                         ldap_memfree( xtext );
1188                                 }
1189
1190                                 if ( xmatched ) {
1191                                         ldap_memfree( xmatched );
1192                                 }
1193                         }
1194
1195                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1196                                 meta_back_quarantine( op, rs, i );
1197                         }
1198                 }
1199
1200                 if ( err != LDAP_SUCCESS ) {
1201                         rs->sr_err = err;
1202                 }
1203         }
1204
1205         if ( matched != NULL ) {
1206                 struct berval   dn, pdn;
1207
1208                 ber_str2bv( matched, 0, 0, &dn );
1209                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1210                         ldap_memfree( matched );
1211                         matched_ctx = op->o_tmpmemctx;
1212                         matched = pdn.bv_val;
1213                 }
1214                 rs->sr_matched = matched;
1215         }
1216
1217         if ( op->o_conn &&
1218                 ( ( sendok & LDAP_BACK_SENDOK )
1219                         || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1220         {
1221                 send_ldap_result( op, rs );
1222         }
1223         if ( matched ) {
1224                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1225         }
1226         if ( text ) {
1227                 ldap_memfree( text );
1228         }
1229         if ( rs->sr_ref ) {
1230                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1231                 rs->sr_ref = NULL;
1232         }
1233         if ( refs ) {
1234                 ber_memvfree( (void **)refs );
1235         }
1236         if ( ctrls ) {
1237                 assert( rs->sr_ctrls != NULL );
1238                 ldap_controls_free( ctrls );
1239         }
1240
1241         rs->sr_text = save_text;
1242         rs->sr_matched = save_matched;
1243         rs->sr_ref = save_ref;
1244         rs->sr_ctrls = save_ctrls;
1245
1246         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1247 }
1248
1249 /*
1250  * meta_back_proxy_authz_cred()
1251  *
1252  * prepares credentials & method for meta_back_proxy_authz_bind();
1253  * or, if method is SASL, performs the SASL bind directly.
1254  */
1255 int
1256 meta_back_proxy_authz_cred(
1257         metaconn_t              *mc,
1258         int                     candidate,
1259         Operation               *op,
1260         SlapReply               *rs,
1261         ldap_back_send_t        sendok,
1262         struct berval           *binddn,
1263         struct berval           *bindcred,
1264         int                     *method )
1265 {
1266         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1267         metatarget_t            *mt = mi->mi_targets[ candidate ];
1268         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1269         struct berval           ndn;
1270         int                     dobind = 0;
1271
1272         /* don't proxyAuthz if protocol is not LDAPv3 */
1273         switch ( mt->mt_version ) {
1274         case LDAP_VERSION3:
1275                 break;
1276
1277         case 0:
1278                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1279                         break;
1280                 }
1281                 /* fall thru */
1282
1283         default:
1284                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1285                 if ( sendok & LDAP_BACK_SENDERR ) {
1286                         send_ldap_result( op, rs );
1287                 }
1288                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1289                 goto done;
1290         }
1291
1292         if ( op->o_tag == LDAP_REQ_BIND ) {
1293                 ndn = op->o_req_ndn;
1294
1295         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1296                 ndn = op->o_conn->c_ndn;
1297
1298         } else {
1299                 ndn = op->o_ndn;
1300         }
1301
1302         /*
1303          * FIXME: we need to let clients use proxyAuthz
1304          * otherwise we cannot do symmetric pools of servers;
1305          * we have to live with the fact that a user can
1306          * authorize itself as any ID that is allowed
1307          * by the authzTo directive of the "proxyauthzdn".
1308          */
1309         /*
1310          * NOTE: current Proxy Authorization specification
1311          * and implementation do not allow proxy authorization
1312          * control to be provided with Bind requests
1313          */
1314         /*
1315          * if no bind took place yet, but the connection is bound
1316          * and the "proxyauthzdn" is set, then bind as
1317          * "proxyauthzdn" and explicitly add the proxyAuthz
1318          * control to every operation with the dn bound
1319          * to the connection as control value.
1320          */
1321
1322         /* bind as proxyauthzdn only if no idassert mode
1323          * is requested, or if the client's identity
1324          * is authorized */
1325         switch ( mt->mt_idassert_mode ) {
1326         case LDAP_BACK_IDASSERT_LEGACY:
1327                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1328                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1329                         {
1330                                 *binddn = mt->mt_idassert_authcDN;
1331                                 *bindcred = mt->mt_idassert_passwd;
1332                                 dobind = 1;
1333                         }
1334                 }
1335                 break;
1336
1337         default:
1338                 /* NOTE: rootdn can always idassert */
1339                 if ( BER_BVISNULL( &ndn )
1340                         && mt->mt_idassert_authz == NULL
1341                         && !( mt->mt_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
1342                 {
1343                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1344                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1345                                 if ( sendok & LDAP_BACK_SENDERR ) {
1346                                         send_ldap_result( op, rs );
1347                                 }
1348                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1349                                 goto done;
1350
1351                         }
1352
1353                         rs->sr_err = LDAP_SUCCESS;
1354                         *binddn = slap_empty_bv;
1355                         *bindcred = slap_empty_bv;
1356                         break;
1357
1358                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1359                         struct berval authcDN;
1360
1361                         if ( BER_BVISNULL( &ndn ) ) {
1362                                 authcDN = slap_empty_bv;
1363
1364                         } else {
1365                                 authcDN = ndn;
1366                         }
1367                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1368                                         &authcDN, &authcDN );
1369                         if ( rs->sr_err != LDAP_SUCCESS ) {
1370                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1371                                         if ( sendok & LDAP_BACK_SENDERR ) {
1372                                                 send_ldap_result( op, rs );
1373                                         }
1374                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1375                                         goto done;
1376                                 }
1377
1378                                 rs->sr_err = LDAP_SUCCESS;
1379                                 *binddn = slap_empty_bv;
1380                                 *bindcred = slap_empty_bv;
1381                                 break;
1382                         }
1383                 }
1384
1385                 *binddn = mt->mt_idassert_authcDN;
1386                 *bindcred = mt->mt_idassert_passwd;
1387                 dobind = 1;
1388                 break;
1389         }
1390
1391         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1392 #ifdef HAVE_CYRUS_SASL
1393                 void            *defaults = NULL;
1394                 struct berval   authzID = BER_BVNULL;
1395                 int             freeauthz = 0;
1396
1397                 /* if SASL supports native authz, prepare for it */
1398                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1399                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1400                 {
1401                         switch ( mt->mt_idassert_mode ) {
1402                         case LDAP_BACK_IDASSERT_OTHERID:
1403                         case LDAP_BACK_IDASSERT_OTHERDN:
1404                                 authzID = mt->mt_idassert_authzID;
1405                                 break;
1406
1407                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1408                                 BER_BVSTR( &authzID, "dn:" );
1409                                 break;
1410
1411                         case LDAP_BACK_IDASSERT_SELF:
1412                                 if ( BER_BVISNULL( &ndn ) ) {
1413                                         /* connection is not authc'd, so don't idassert */
1414                                         BER_BVSTR( &authzID, "dn:" );
1415                                         break;
1416                                 }
1417                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1418                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1419                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1420                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1421                                                 ndn.bv_val, ndn.bv_len + 1 );
1422                                 freeauthz = 1;
1423                                 break;
1424
1425                         default:
1426                                 break;
1427                         }
1428                 }
1429
1430                 if ( mt->mt_idassert_secprops != NULL ) {
1431                         rs->sr_err = ldap_set_option( msc->msc_ld,
1432                                 LDAP_OPT_X_SASL_SECPROPS,
1433                                 (void *)mt->mt_idassert_secprops );
1434
1435                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1436                                 rs->sr_err = LDAP_OTHER;
1437                                 if ( sendok & LDAP_BACK_SENDERR ) {
1438                                         send_ldap_result( op, rs );
1439                                 }
1440                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1441                                 goto done;
1442                         }
1443                 }
1444
1445                 defaults = lutil_sasl_defaults( msc->msc_ld,
1446                                 mt->mt_idassert_sasl_mech.bv_val,
1447                                 mt->mt_idassert_sasl_realm.bv_val,
1448                                 mt->mt_idassert_authcID.bv_val,
1449                                 mt->mt_idassert_passwd.bv_val,
1450                                 authzID.bv_val );
1451                 if ( defaults == NULL ) {
1452                         rs->sr_err = LDAP_OTHER;
1453                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1454                         if ( sendok & LDAP_BACK_SENDERR ) {
1455                                 send_ldap_result( op, rs );
1456                         }
1457                         goto done;
1458                 }
1459
1460                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1461                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1462                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1463                                 defaults );
1464
1465                 rs->sr_err = slap_map_api2result( rs );
1466                 if ( rs->sr_err != LDAP_SUCCESS ) {
1467                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1468                         if ( sendok & LDAP_BACK_SENDERR ) {
1469                                 send_ldap_result( op, rs );
1470                         }
1471
1472                 } else {
1473                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1474                 }
1475
1476                 lutil_sasl_freedefs( defaults );
1477                 if ( freeauthz ) {
1478                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1479                 }
1480
1481                 goto done;
1482 #endif /* HAVE_CYRUS_SASL */
1483         }
1484
1485         *method = mt->mt_idassert_authmethod;
1486         switch ( mt->mt_idassert_authmethod ) {
1487         case LDAP_AUTH_NONE:
1488                 BER_BVSTR( binddn, "" );
1489                 BER_BVSTR( bindcred, "" );
1490                 /* fallthru */
1491
1492         case LDAP_AUTH_SIMPLE:
1493                 break;
1494
1495         default:
1496                 /* unsupported! */
1497                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1498                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1499                 if ( sendok & LDAP_BACK_SENDERR ) {
1500                         send_ldap_result( op, rs );
1501                 }
1502                 break;
1503         }
1504
1505 done:;
1506         return rs->sr_err;
1507 }
1508
1509 static int
1510 meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1511 {
1512         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1513         metatarget_t            *mt = mi->mi_targets[ candidate ];
1514         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1515         struct berval           binddn = BER_BVC( "" ),
1516                                 cred = BER_BVC( "" );
1517         int                     method = LDAP_AUTH_NONE,
1518                                 rc;
1519
1520         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1521         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1522                 int     msgid;
1523
1524                 switch ( method ) {
1525                 case LDAP_AUTH_NONE:
1526                 case LDAP_AUTH_SIMPLE:
1527                         for (;;) {
1528                                 rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1529                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1530                                         &cred, NULL, NULL, &msgid );
1531                                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
1532                                         break;
1533                                 }
1534                                 ldap_pvt_thread_yield();
1535                         }
1536                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
1537                         if ( rc == LDAP_SUCCESS ) {
1538                                 /* set rebind stuff in case of successful proxyAuthz bind,
1539                                  * so that referral chasing is attempted using the right
1540                                  * identity */
1541                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1542                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1543
1544                                 if ( LDAP_BACK_SAVECRED( mi ) ) {
1545                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1546                                                 memset( msc->msc_cred.bv_val, 0,
1547                                                         msc->msc_cred.bv_len );
1548                                         }
1549                                         ber_bvreplace( &msc->msc_cred, &cred );
1550                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1551                                 }
1552                         }
1553                         break;
1554
1555                 default:
1556                         assert( 0 );
1557                         break;
1558                 }
1559         }
1560
1561         return LDAP_BACK_CONN_ISBOUND( msc );
1562 }
1563
1564 /*
1565  * Add controls;
1566  *
1567  * if any needs to be added, it is prepended to existing ones,
1568  * in a newly allocated array.  The companion function
1569  * ldap_back_controls_free() must be used to restore the original
1570  * status of op->o_ctrls.
1571  */
1572 int
1573 meta_back_controls_add(
1574                 Operation       *op,
1575                 SlapReply       *rs,
1576                 metaconn_t      *mc,
1577                 int             candidate,
1578                 LDAPControl     ***pctrls )
1579 {
1580         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1581         metatarget_t            *mt = mi->mi_targets[ candidate ];
1582         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1583
1584         LDAPControl             **ctrls = NULL;
1585         /* set to the maximum number of controls this backend can add */
1586         LDAPControl             c[ 2 ] = { 0 };
1587         int                     i = 0, j = 0;
1588
1589         *pctrls = NULL;
1590
1591         rs->sr_err = LDAP_SUCCESS;
1592
1593         /* don't add controls if protocol is not LDAPv3 */
1594         switch ( mt->mt_version ) {
1595         case LDAP_VERSION3:
1596                 break;
1597
1598         case 0:
1599                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1600                         break;
1601                 }
1602                 /* fall thru */
1603
1604         default:
1605                 goto done;
1606         }
1607
1608         /* proxyAuthz for identity assertion */
1609         switch ( ldap_back_proxy_authz_ctrl( op, rs, &msc->msc_bound_ndn,
1610                 mt->mt_version, &mt->mt_idassert, &c[ j ] ) )
1611         {
1612         case SLAP_CB_CONTINUE:
1613                 break;
1614
1615         case LDAP_SUCCESS:
1616                 j++;
1617                 break;
1618
1619         default:
1620                 goto done;
1621         }
1622
1623 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
1624         /* session tracking */
1625         if ( META_BACK_TGT_ST_REQUEST( mt ) ) {
1626                 switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j ] ) ) {
1627                 case SLAP_CB_CONTINUE:
1628                         break;
1629
1630                 case LDAP_SUCCESS:
1631                         j++;
1632                         break;
1633
1634                 default:
1635                         goto done;
1636                 }
1637         }
1638 #endif /* SLAP_CONTROL_X_SESSION_TRACKING */
1639
1640         if ( rs->sr_err == SLAP_CB_CONTINUE ) {
1641                 rs->sr_err = LDAP_SUCCESS;
1642         }
1643
1644         if ( j == 0 ) {
1645                 goto done;
1646         }
1647
1648         if ( op->o_ctrls ) {
1649                 for ( i = 0; op->o_ctrls[ i ]; i++ )
1650                         /* just count ctrls */ ;
1651         }
1652
1653         ctrls = op->o_tmpalloc( sizeof( LDAPControl * ) * (i + j + 1) + j * sizeof( LDAPControl ),
1654                         op->o_tmpmemctx );
1655         ctrls[ 0 ] = (LDAPControl *)&ctrls[ i + j + 1 ];
1656         *ctrls[ 0 ] = c[ 0 ];
1657         for ( i = 1; i < j; i++ ) {
1658                 ctrls[ i ] = &ctrls[ 0 ][ i ];
1659                 *ctrls[ i ] = c[ i ];
1660         }
1661
1662         i = 0;
1663         if ( op->o_ctrls ) {
1664                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1665                         ctrls[ i + j ] = op->o_ctrls[ i ];
1666                 }
1667         }
1668         ctrls[ i + j ] = NULL;
1669
1670 done:;
1671         if ( ctrls == NULL ) {
1672                 ctrls = op->o_ctrls;
1673         }
1674
1675         *pctrls = ctrls;
1676
1677         return rs->sr_err;
1678 }
1679