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