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
 193                         /* FIXME: in some cases (e.g. unavailable)
 194                          * do not assume it's not candidate; rather
 195                          * mark this as an error to be eventually
 196                          * reported to client */
 197                         META_CANDIDATE_CLEAR( &candidates[ i ] );
 198                         break;
 199                 }
 200         }
 201
 202         /* must re-insert if local DN changed as result of bind */
 203         if ( rc == LDAP_SUCCESS ) {
 204                 if ( isroot ) {
 205                         mc->mc_authz_target = META_BOUND_ALL;
 206                 }
 207
 208                 if ( !LDAP_BACK_PCONN_ISPRIV( mc )
 209                         && !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) )
 210                 {
 211                         int             lerr;
 212
 213                         /* wait for all other ops to release the connection */
 214                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 215                         assert( mc->mc_refcnt == 1 );
 216 #if META_BACK_PRINT_CONNTREE > 0
 217                         meta_back_print_conntree( mi, ">>> meta_back_bind" );
 218 #endif /* META_BACK_PRINT_CONNTREE */
 219
 220                         /* delete all cached connections with the current connection */
 221                         if ( LDAP_BACK_SINGLECONN( mi ) ) {
 222                                 metaconn_t      *tmpmc;
 223
 224                                 while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
 225                                 {
 226                                         Debug( LDAP_DEBUG_TRACE,
 227                                                 "=>meta_back_bind: destroying conn %ld (refcnt=%u)\n",
 228                                                 LDAP_BACK_PCONN_ID( mc ), mc->mc_refcnt, 0 );
 229
 230                                         if ( tmpmc->mc_refcnt != 0 ) {
 231                                                 /* taint it */
 232                                                 LDAP_BACK_CONN_TAINTED_SET( tmpmc );
 233
 234                                         } else {
 235                                                 /*
 236                                                  * Needs a test because the handler may be corrupted,
 237                                                  * and calling ldap_unbind on a corrupted header results
 238                                                  * in a segmentation fault
 239                                                  */
 240                                                 meta_back_conn_free( tmpmc );
 241                                         }
 242                                 }
 243                         }
 244
 245                         ber_bvreplace( &mc->mc_local_ndn, &op->o_req_ndn );
 246                         lerr = avl_insert( &mi->mi_conninfo.lai_tree, (caddr_t)mc,
 247                                 meta_back_conndn_cmp, meta_back_conndn_dup );
 248 #if META_BACK_PRINT_CONNTREE > 0
 249                         meta_back_print_conntree( mi, "<<< meta_back_bind" );
 250 #endif /* META_BACK_PRINT_CONNTREE */
 251                         if ( lerr == 0 ) {
 252                                 if ( isroot ) {
 253                                         LDAP_BACK_CONN_ISPRIV_SET( mc );
 254                                         LDAP_BACK_PCONN_SET( mc, op );
 255                                 }
 256                                 LDAP_BACK_CONN_CACHED_SET( mc );
 257
 258                         } else {
 259                                 LDAP_BACK_CONN_CACHED_CLEAR( mc );
 260                         }
 261                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 262                 }
 263         }
 264
 265         if ( mc != NULL ) {
 266                 meta_back_release_conn( mi, mc );
 267         }
 268
 269         /*
 270          * rc is LDAP_SUCCESS if at least one bind succeeded,
 271          * err is the last error that occurred during a bind;
 272          * if at least (and at most?) one bind succeeds, fine.
 273          */
 274         if ( rc != LDAP_SUCCESS ) {
 275
 276                 /*
 277                  * deal with bind failure ...
 278                  */
 279
 280                 /*
 281                  * no target was found within the naming context,
 282                  * so bind must fail with invalid credentials
 283                  */
 284                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 285                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 286                 } else {
 287                         rs->sr_err = slap_map_api2result( rs );
 288                 }
 289                 send_ldap_result( op, rs );
 290                 return rs->sr_err;
 291
 292         }
 293
 294         return LDAP_SUCCESS;
 295 }
 296
 297 static int
 298 meta_back_bind_op_result(
 299         Operation               *op,
 300         SlapReply               *rs,
 301         metaconn_t              *mc,
 302         int                     candidate,
 303         int                     msgid,
 304         ldap_back_send_t        sendok )
 305 {
 306         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 307         metatarget_t            *mt = mi->mi_targets[ candidate ];
 308         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 309         LDAPMessage             *res;
 310         struct timeval          tv;
 311         int                     rc;
 312         int                     nretries = mt->mt_nretries;
 313         char                    buf[ SLAP_TEXT_BUFLEN ];
 314
 315         Debug( LDAP_DEBUG_TRACE,
 316                 ">>> %s meta_back_bind_op_result[%d]\n",
 317                 op->o_log_prefix, candidate, 0 );
 318
 319         /* make sure this is clean */
 320         assert( rs->sr_ctrls == NULL );
 321
 322         if ( rs->sr_err == LDAP_SUCCESS ) {
 323                 time_t          stoptime = (time_t)(-1),
 324                                 timeout;
 325                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 326                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 327                 const char      *timeout_text = "Operation timed out";
 328                 slap_op_t       opidx = slap_req2op( op->o_tag );
 329
 330                 /* since timeout is not specified, compute and use
 331                  * the one specific to the ongoing operation */
 332                 if ( opidx == LDAP_REQ_SEARCH ) {
 333                         if ( op->ors_tlimit <= 0 ) {
 334                                 timeout = 0;
 335
 336                         } else {
 337                                 timeout = op->ors_tlimit;
 338                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 339                                 timeout_text = NULL;
 340                         }
 341
 342                 } else {
 343                         timeout = mt->mt_timeout[ opidx ];
 344                 }
 345
 346                 /* better than nothing :) */
 347                 if ( timeout == 0 ) {
 348                         if ( mi->mi_idle_timeout ) {
 349                                 timeout = mi->mi_idle_timeout;
 350
 351                         } else if ( mi->mi_conn_ttl ) {
 352                                 timeout = mi->mi_conn_ttl;
 353                         }
 354                 }
 355
 356                 if ( timeout ) {
 357                         stoptime = op->o_time + timeout;
 358                 }
 359
 360                 LDAP_BACK_TV_SET( &tv );
 361
 362                 /*
 363                  * handle response!!!
 364                  */
 365 retry:;
 366                 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 367                 switch ( rc ) {
 368                 case 0:
 369                         if ( nretries != META_RETRY_NEVER
 370                                 || ( timeout && slap_get_time() <= stoptime ) )
 371                         {
 372                                 ldap_pvt_thread_yield();
 373                                 if ( nretries > 0 ) {
 374                                         nretries--;
 375                                 }
 376                                 tv = mt->mt_bind_timeout;
 377                                 goto retry;
 378                         }
 379
 380                         /* don't let anyone else use this handler,
 381                          * because there's a pending bind that will not
 382                          * be acknowledged */
 383                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 384                         assert( LDAP_BACK_CONN_BINDING( msc ) );
 385
 386 #ifdef DEBUG_205
 387                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_bind_op_result ldap_unbind_ext[%d] ld=%p\n",
 388                                 op->o_log_prefix, candidate, (void *)msc->msc_ld );
 389 #endif /* DEBUG_205 */
 390
 391                         meta_clear_one_candidate( op, mc, candidate );
 392                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 393
 394                         rs->sr_err = timeout_err;
 395                         rs->sr_text = timeout_text;
 396                         break;
 397
 398                 case -1:
 399                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 400                                 &rs->sr_err );
 401
 402                         snprintf( buf, sizeof( buf ),
 403                                 "err=%d (%s) nretries=%d",
 404                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 405                         Debug( LDAP_DEBUG_ANY,
 406                                 "### %s meta_back_bind_op_result[%d]: %s.\n",
 407                                 op->o_log_prefix, candidate, buf );
 408                         break;
 409
 410                 default:
 411                         /* only touch when activity actually took place... */
 412                         if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 413                                 msc->msc_time = op->o_time;
 414                         }
 415
 416                         /* FIXME: matched? referrals? response controls? */
 417                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 418                                         NULL, NULL, NULL, NULL, 1 );
 419                         if ( rc != LDAP_SUCCESS ) {
 420                                 rs->sr_err = rc;
 421                         }
 422                         break;
 423                 }
 424         }
 425
 426         rs->sr_err = slap_map_api2result( rs );
 427
 428         Debug( LDAP_DEBUG_TRACE,
 429                 "<<< %s meta_back_bind_op_result[%d] err=%d\n",
 430                 op->o_log_prefix, candidate, rs->sr_err );
 431
 432         return rs->sr_err;
 433 }
 434
 435 /*
 436  * meta_back_single_bind
 437  *
 438  * attempts to perform a bind with creds
 439  */
 440 static int
 441 meta_back_single_bind(
 442         Operation               *op,
 443         SlapReply               *rs,
 444         metaconn_t              *mc,
 445         int                     candidate )
 446 {
 447         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 448         metatarget_t            *mt = mi->mi_targets[ candidate ];
 449         struct berval           mdn = BER_BVNULL;
 450         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 451         int                     msgid;
 452         dncookie                dc;
 453         struct berval           save_o_dn;
 454         int                     save_o_do_not_cache;
 455         LDAPControl             **ctrls = NULL;
 456
 457         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 458                 ch_free( msc->msc_bound_ndn.bv_val );
 459                 BER_BVZERO( &msc->msc_bound_ndn );
 460         }
 461
 462         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 463                 /* destroy sensitive data */
 464                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 465                 ch_free( msc->msc_cred.bv_val );
 466                 BER_BVZERO( &msc->msc_cred );
 467         }
 468
 469         /*
 470          * Rewrite the bind dn if needed
 471          */
 472         dc.target = mt;
 473         dc.conn = op->o_conn;
 474         dc.rs = rs;
 475         dc.ctx = "bindDN";
 476
 477         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 478                 rs->sr_text = "DN rewrite error";
 479                 rs->sr_err = LDAP_OTHER;
 480                 return rs->sr_err;
 481         }
 482
 483         /* don't add proxyAuthz; set the bindDN */
 484         save_o_dn = op->o_dn;
 485         save_o_do_not_cache = op->o_do_not_cache;
 486         op->o_do_not_cache = 1;
 487         op->o_dn = op->o_req_dn;
 488
 489         ctrls = op->o_ctrls;
 490         rs->sr_err = meta_back_controls_add( op, rs, mc, candidate, &ctrls );
 491         op->o_dn = save_o_dn;
 492         op->o_do_not_cache = save_o_do_not_cache;
 493         if ( rs->sr_err != LDAP_SUCCESS ) {
 494                 goto return_results;
 495         }
 496
 497         /* FIXME: this fixes the bind problem right now; we need
 498          * to use the asynchronous version to get the "matched"
 499          * and more in case of failure ... */
 500         /* FIXME: should we check if at least some of the op->o_ctrls
 501          * can/should be passed? */
 502         for (;;) {
 503                 rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 504                         LDAP_SASL_SIMPLE, &op->orb_cred,
 505                         ctrls, NULL, &msgid );
 506                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
 507                         break;
 508                 }
 509                 ldap_pvt_thread_yield();
 510         }
 511
 512         ldap_back_controls_free( op, rs, &ctrls );
 513
 514         meta_back_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND );
 515         if ( rs->sr_err != LDAP_SUCCESS ) {
 516                 goto return_results;
 517         }
 518
 519         /* If defined, proxyAuthz will be used also when
 520          * back-ldap is the authorizing backend; for this
 521          * purpose, a successful bind is followed by a
 522          * bind with the configured identity assertion */
 523         /* NOTE: use with care */
 524         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 525                 meta_back_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR );
 526                 if ( !LDAP_BACK_CONN_ISBOUND( msc ) ) {
 527                         goto return_results;
 528                 }
 529                 goto cache_refresh;
 530         }
 531
 532         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_ndn );
 533         LDAP_BACK_CONN_ISBOUND_SET( msc );
 534         mc->mc_authz_target = candidate;
 535
 536         if ( LDAP_BACK_SAVECRED( mi ) ) {
 537                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 538                         memset( msc->msc_cred.bv_val, 0,
 539                                 msc->msc_cred.bv_len );
 540                 }
 541                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 542                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 543         }
 544
 545 cache_refresh:;
 546         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 547                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 548         {
 549                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 550                                 &op->o_req_ndn, candidate );
 551         }
 552
 553 return_results:;
 554         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 555                 free( mdn.bv_val );
 556         }
 557
 558         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 559                 meta_back_quarantine( op, rs, candidate );
 560         }
 561
 562         return rs->sr_err;
 563 }
 564
 565 /*
 566  * meta_back_single_dobind
 567  */
 568 int
 569 meta_back_single_dobind(
 570         Operation               *op,
 571         SlapReply               *rs,
 572         metaconn_t              **mcp,
 573         int                     candidate,
 574         ldap_back_send_t        sendok,
 575         int                     nretries,
 576         int                     dolock )
 577 {
 578         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 579         metatarget_t            *mt = mi->mi_targets[ candidate ];
 580         metaconn_t              *mc = *mcp;
 581         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 582         static struct berval    cred = BER_BVC( "" );
 583         int                     msgid;
 584
 585         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 586
 587         /* NOTE: this obsoletes pseudorootdn */
 588         if ( op->o_conn != NULL &&
 589                 !op->o_do_not_cache &&
 590                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 591                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 592                         ( LDAP_BACK_CONN_ISPRIV( mc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
 593                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 594         {
 595                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
 596
 597         } else {
 598
 599                 /* FIXME: should we check if at least some of the op->o_ctrls
 600                  * can/should be passed? */
 601                 for (;;) {
 602                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
 603                                 "", LDAP_SASL_SIMPLE, &cred,
 604                                 NULL, NULL, &msgid );
 605                         if ( rs->sr_err != LDAP_X_CONNECTING ) {
 606                                 break;
 607                         }
 608                         ldap_pvt_thread_yield();
 609                 }
 610
 611                 rs->sr_err = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
 612         }
 613
 614         if ( rs->sr_err != LDAP_SUCCESS ) {
 615                 if ( dolock ) {
 616                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 617                 }
 618                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 619                 if ( META_BACK_ONERR_STOP( mi ) ) {
 620                         LDAP_BACK_CONN_TAINTED_SET( mc );
 621                         meta_back_release_conn_lock( mi, mc, 0 );
 622                         *mcp = NULL;
 623                 }
 624                 if ( dolock ) {
 625                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 626                 }
 627         }
 628
 629         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 630                 meta_back_quarantine( op, rs, candidate );
 631         }
 632
 633         return rs->sr_err;
 634 }
 635
 636 /*
 637  * meta_back_dobind
 638  */
 639 int
 640 meta_back_dobind(
 641         Operation               *op,
 642         SlapReply               *rs,
 643         metaconn_t              *mc,
 644         ldap_back_send_t        sendok )
 645 {
 646         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 647
 648         int                     bound = 0,
 649                                 i,
 650                                 isroot = 0;
 651
 652         SlapReply               *candidates;
 653
 654         if ( be_isroot( op ) ) {
 655                 isroot = 1;
 656         }
 657
 658         Debug( LDAP_DEBUG_TRACE,
 659                 "%s meta_back_dobind: conn=%ld%s\n",
 660                 op->o_log_prefix,
 661                 LDAP_BACK_PCONN_ID( mc ),
 662                 isroot ? " (isroot)" : "" );
 663
 664         /*
 665          * all the targets are bound as pseudoroot
 666          */
 667         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 668                 bound = 1;
 669                 goto done;
 670         }
 671
 672         candidates = meta_back_candidates_get( op );
 673
 674         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 675                 metatarget_t            *mt = mi->mi_targets[ i ];
 676                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 677                 int                     rc;
 678
 679                 /*
 680                  * Not a candidate
 681                  */
 682                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 683                         continue;
 684                 }
 685
 686                 assert( msc->msc_ld != NULL );
 687
 688                 /*
 689                  * If the target is already bound it is skipped
 690                  */
 691
 692 retry_binding:;
 693                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 694                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 695                         || ( LDAP_BACK_CONN_ISANON( msc )
 696                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 697                 {
 698                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 699                         ++bound;
 700                         continue;
 701
 702                 } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
 703                 {
 704                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 705                         ldap_pvt_thread_yield();
 706                         goto retry_binding;
 707
 708                 }
 709
 710                 LDAP_BACK_CONN_BINDING_SET( msc );
 711                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 712
 713                 rc = meta_back_single_dobind( op, rs, &mc, i,
 714                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 715                 /*
 716                  * NOTE: meta_back_single_dobind() already retries;
 717                  * in case of failure, it resets mc...
 718                  */
 719                 if ( rc != LDAP_SUCCESS ) {
 720                         char            buf[ SLAP_TEXT_BUFLEN ];
 721
 722                         if ( mc == NULL ) {
 723                                 /* meta_back_single_dobind() already sent
 724                                  * response and released connection */
 725                                 goto send_err;
 726                         }
 727
 728
 729                         if ( rc == LDAP_UNAVAILABLE ) {
 730                                 /* FIXME: meta_back_retry() already re-calls
 731                                  * meta_back_single_dobind() */
 732                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 733                                         goto retry_ok;
 734                                 }
 735
 736                                 if ( mc != NULL ) {
 737                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 738                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 739                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 740                                         meta_back_release_conn( mi, mc );
 741                                 }
 742
 743                                 return 0;
 744                         }
 745
 746                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 747                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 748                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 749
 750                         snprintf( buf, sizeof( buf ),
 751                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 752                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 753                                 rc, ldap_err2string( rc ) );
 754                         Debug( LDAP_DEBUG_ANY,
 755                                 "%s %s\n",
 756                                 op->o_log_prefix, buf, 0 );
 757
 758                         /*
 759                          * null cred bind should always succeed
 760                          * as anonymous, so a failure means
 761                          * the target is no longer candidate possibly
 762                          * due to technical reasons (remote host down?)
 763                          * so better clear the handle
 764                          */
 765                         /* leave the target candidate, but record the error for later use */
 766                         candidates[ i ].sr_err = rc;
 767                         if ( META_BACK_ONERR_STOP( mi ) ) {
 768                                 bound = 0;
 769                                 goto done;
 770                         }
 771
 772                         continue;
 773                 } /* else */
 774
 775 retry_ok:;
 776                 Debug( LDAP_DEBUG_TRACE,
 777                         "%s meta_back_dobind[%d]: "
 778                         "(%s)\n",
 779                         op->o_log_prefix, i,
 780                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 781
 782                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 783                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 784                 if ( isroot ) {
 785                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 786                 } else {
 787                         LDAP_BACK_CONN_ISANON_SET( msc );
 788                 }
 789                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 790                 ++bound;
 791         }
 792
 793 done:;
 794         Debug( LDAP_DEBUG_TRACE,
 795                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 796                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc ), bound );
 797
 798         if ( bound == 0 ) {
 799                 meta_back_release_conn( mi, mc );
 800
 801 send_err:;
 802                 if ( sendok & LDAP_BACK_SENDERR ) {
 803                         if ( rs->sr_err == LDAP_SUCCESS ) {
 804                                 rs->sr_err = LDAP_BUSY;
 805                         }
 806                         send_ldap_result( op, rs );
 807                 }
 808
 809                 return 0;
 810         }
 811
 812         return ( bound > 0 );
 813 }
 814
 815 /*
 816  * meta_back_default_rebind
 817  *
 818  * This is a callback used for chasing referrals using the same
 819  * credentials as the original user on this session.
 820  */
 821 int
 822 meta_back_default_rebind(
 823         LDAP                    *ld,
 824         LDAP_CONST char         *url,
 825         ber_tag_t               request,
 826         ber_int_t               msgid,
 827         void                    *params )
 828 {
 829         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 830
 831         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 832                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 833                         NULL, NULL, NULL );
 834 }
 835
 836 /*
 837  * meta_back_default_urllist
 838  *
 839  * This is a callback used for mucking with the urllist
 840  */
 841 int
 842 meta_back_default_urllist(
 843         LDAP            *ld,
 844         LDAPURLDesc     **urllist,
 845         LDAPURLDesc     **url,
 846         void            *params )
 847 {
 848         metatarget_t    *mt = (metatarget_t *)params;
 849         LDAPURLDesc     **urltail;
 850
 851         if ( urllist == url ) {
 852                 return LDAP_SUCCESS;
 853         }
 854
 855         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 856                 /* count */ ;
 857
 858         *urltail = *urllist;
 859         *urllist = *url;
 860         *url = NULL;
 861
 862         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 863         if ( mt->mt_uri ) {
 864                 ch_free( mt->mt_uri );
 865         }
 866
 867         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 868         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 869
 870         return LDAP_SUCCESS;
 871 }
 872
 873 int
 874 meta_back_cancel(
 875         metaconn_t              *mc,
 876         Operation               *op,
 877         SlapReply               *rs,
 878         ber_int_t               msgid,
 879         int                     candidate,
 880         ldap_back_send_t        sendok )
 881 {
 882         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 883
 884         metatarget_t            *mt = mi->mi_targets[ candidate ];
 885         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 886
 887         int                     rc = LDAP_OTHER;
 888
 889         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 890                 op->o_log_prefix, candidate, msgid );
 891
 892         /* default behavior */
 893         if ( META_BACK_TGT_ABANDON( mt ) ) {
 894                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 895
 896         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 897                 rc = ldap_pvt_discard( msc->msc_ld, msgid );
 898
 899         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 900                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 901
 902         } else {
 903                 assert( 0 );
 904         }
 905
 906         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 907                 op->o_log_prefix, candidate, rc );
 908
 909         return rc;
 910 }
 911
 912
 913
 914 /*
 915  * FIXME: error return must be handled in a cleaner way ...
 916  */
 917 int
 918 meta_back_op_result(
 919         metaconn_t              *mc,
 920         Operation               *op,
 921         SlapReply               *rs,
 922         int                     candidate,
 923         ber_int_t               msgid,
 924         time_t                  timeout,
 925         ldap_back_send_t        sendok )
 926 {
 927         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 928
 929         const char      *save_text = rs->sr_text,
 930                         *save_matched = rs->sr_matched;
 931         BerVarray       save_ref = rs->sr_ref;
 932         LDAPControl     **save_ctrls = rs->sr_ctrls;
 933         void            *matched_ctx = NULL;
 934
 935         char            *matched = NULL;
 936         char            *text = NULL;
 937         char            **refs = NULL;
 938         LDAPControl     **ctrls = NULL;
 939
 940         assert( mc != NULL );
 941
 942         rs->sr_text = NULL;
 943         rs->sr_matched = NULL;
 944         rs->sr_ref = NULL;
 945         rs->sr_ctrls = NULL;
 946
 947         if ( candidate != META_TARGET_NONE ) {
 948                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 949                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 950
 951 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
 952
 953                 if ( ERR_OK( rs->sr_err ) ) {
 954                         int             rc;
 955                         struct timeval  tv;
 956                         LDAPMessage     *res = NULL;
 957                         time_t          stoptime = (time_t)(-1);
 958                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 959                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 960                         const char      *timeout_text = "Operation timed out";
 961
 962                         /* if timeout is not specified, compute and use
 963                          * the one specific to the ongoing operation */
 964                         if ( timeout == (time_t)(-1) ) {
 965                                 slap_op_t       opidx = slap_req2op( op->o_tag );
 966
 967                                 if ( opidx == SLAP_OP_SEARCH ) {
 968                                         if ( op->ors_tlimit <= 0 ) {
 969                                                 timeout = 0;
 970
 971                                         } else {
 972                                                 timeout = op->ors_tlimit;
 973                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 974                                                 timeout_text = NULL;
 975                                         }
 976
 977                                 } else {
 978                                         timeout = mt->mt_timeout[ opidx ];
 979                                 }
 980                         }
 981
 982                         /* better than nothing :) */
 983                         if ( timeout == 0 ) {
 984                                 if ( mi->mi_idle_timeout ) {
 985                                         timeout = mi->mi_idle_timeout;
 986
 987                                 } else if ( mi->mi_conn_ttl ) {
 988                                         timeout = mi->mi_conn_ttl;
 989                                 }
 990                         }
 991
 992                         if ( timeout ) {
 993                                 stoptime = op->o_time + timeout;
 994                         }
 995
 996                         LDAP_BACK_TV_SET( &tv );
 997
 998 retry:;
 999                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1000                         switch ( rc ) {
1001                         case 0:
1002                                 if ( timeout && slap_get_time() > stoptime ) {
1003                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
1004                                         rs->sr_err = timeout_err;
1005                                         rs->sr_text = timeout_text;
1006                                         break;
1007                                 }
1008
1009                                 LDAP_BACK_TV_SET( &tv );
1010                                 ldap_pvt_thread_yield();
1011                                 goto retry;
1012
1013                         case -1:
1014                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
1015                                                 &rs->sr_err );
1016                                 break;
1017
1018
1019                         /* otherwise get the result; if it is not
1020                          * LDAP_SUCCESS, record it in the reply
1021                          * structure (this includes
1022                          * LDAP_COMPARE_{TRUE|FALSE}) */
1023                         default:
1024                                 /* only touch when activity actually took place... */
1025                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
1026                                         msc->msc_time = op->o_time;
1027                                 }
1028
1029                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
1030                                                 &matched, &text, &refs, &ctrls, 1 );
1031                                 res = NULL;
1032                                 rs->sr_text = text;
1033                                 if ( rc != LDAP_SUCCESS ) {
1034                                         rs->sr_err = rc;
1035                                 }
1036
1037                                 /* RFC 4511: referrals can only appear
1038                                  * if result code is LDAP_REFERRAL */
1039                                 if ( refs != NULL
1040                                         && refs[ 0 ] != NULL
1041                                         && refs[ 0 ][ 0 ] != '\0' )
1042                                 {
1043                                         if ( rs->sr_err != LDAP_REFERRAL ) {
1044                                                 Debug( LDAP_DEBUG_ANY,
1045                                                         "%s meta_back_op_result[%d]: "
1046                                                         "got referrals with err=%d\n",
1047                                                         op->o_log_prefix,
1048                                                         candidate, rs->sr_err );
1049
1050                                         } else {
1051                                                 int     i;
1052
1053                                                 for ( i = 0; refs[ i ] != NULL; i++ )
1054                                                         /* count */ ;
1055                                                 rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1056                                                         op->o_tmpmemctx );
1057                                                 for ( i = 0; refs[ i ] != NULL; i++ ) {
1058                                                         ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1059                                                 }
1060                                                 BER_BVZERO( &rs->sr_ref[ i ] );
1061                                         }
1062
1063                                 } else if ( rs->sr_err == LDAP_REFERRAL ) {
1064                                         Debug( LDAP_DEBUG_ANY,
1065                                                 "%s meta_back_op_result[%d]: "
1066                                                 "got err=%d with null "
1067                                                 "or empty referrals\n",
1068                                                 op->o_log_prefix,
1069                                                 candidate, rs->sr_err );
1070
1071                                         rs->sr_err = LDAP_NO_SUCH_OBJECT;
1072                                 }
1073
1074                                 if ( ctrls != NULL ) {
1075                                         rs->sr_ctrls = ctrls;
1076                                 }
1077                         }
1078
1079                         assert( res == NULL );
1080                 }
1081
1082                 /* if the error in the reply structure is not
1083                  * LDAP_SUCCESS, try to map it from client
1084                  * to server error */
1085                 if ( !ERR_OK( rs->sr_err ) ) {
1086                         rs->sr_err = slap_map_api2result( rs );
1087
1088                         /* internal ops ( op->o_conn == NULL )
1089                          * must not reply to client */
1090                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1091
1092                                 /* record the (massaged) matched
1093                                  * DN into the reply structure */
1094                                 rs->sr_matched = matched;
1095                         }
1096                 }
1097
1098                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1099                         meta_back_quarantine( op, rs, candidate );
1100                 }
1101
1102         } else {
1103                 int     i,
1104                         err = rs->sr_err;
1105
1106                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1107                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1108                         char                    *xtext = NULL;
1109                         char                    *xmatched = NULL;
1110
1111                         rs->sr_err = LDAP_SUCCESS;
1112
1113                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rs->sr_err );
1114                         if ( rs->sr_err != LDAP_SUCCESS ) {
1115                                 /*
1116                                  * better check the type of error. In some cases
1117                                  * (search ?) it might be better to return a
1118                                  * success if at least one of the targets gave
1119                                  * positive result ...
1120                                  */
1121                                 ldap_get_option( msc->msc_ld,
1122                                                 LDAP_OPT_DIAGNOSTIC_MESSAGE, &xtext );
1123                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1124                                         ldap_memfree( xtext );
1125                                         xtext = NULL;
1126                                 }
1127
1128                                 ldap_get_option( msc->msc_ld,
1129                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1130                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1131                                         ldap_memfree( xmatched );
1132                                         xmatched = NULL;
1133                                 }
1134
1135                                 rs->sr_err = slap_map_api2result( rs );
1136
1137                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1138                                         char    buf[ SLAP_TEXT_BUFLEN ];
1139
1140                                         snprintf( buf, sizeof( buf ),
1141                                                 "meta_back_op_result[%d] "
1142                                                 "err=%d text=\"%s\" matched=\"%s\"",
1143                                                 i, rs->sr_err,
1144                                                 ( xtext ? xtext : "" ),
1145                                                 ( xmatched ? xmatched : "" ) );
1146                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1147                                                 op->o_log_prefix, buf, 0 );
1148                                 }
1149
1150                                 /*
1151                                  * FIXME: need to rewrite "match" (need rwinfo)
1152                                  */
1153                                 switch ( rs->sr_err ) {
1154                                 default:
1155                                         err = rs->sr_err;
1156                                         if ( xtext != NULL ) {
1157                                                 if ( text ) {
1158                                                         ldap_memfree( text );
1159                                                 }
1160                                                 text = xtext;
1161                                                 xtext = NULL;
1162                                         }
1163                                         if ( xmatched != NULL ) {
1164                                                 if ( matched ) {
1165                                                         ldap_memfree( matched );
1166                                                 }
1167                                                 matched = xmatched;
1168                                                 xmatched = NULL;
1169                                         }
1170                                         break;
1171                                 }
1172
1173                                 if ( xtext ) {
1174                                         ldap_memfree( xtext );
1175                                 }
1176
1177                                 if ( xmatched ) {
1178                                         ldap_memfree( xmatched );
1179                                 }
1180                         }
1181
1182                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1183                                 meta_back_quarantine( op, rs, i );
1184                         }
1185                 }
1186
1187                 if ( err != LDAP_SUCCESS ) {
1188                         rs->sr_err = err;
1189                 }
1190         }
1191
1192         if ( matched != NULL ) {
1193                 struct berval   dn, pdn;
1194
1195                 ber_str2bv( matched, 0, 0, &dn );
1196                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1197                         ldap_memfree( matched );
1198                         matched_ctx = op->o_tmpmemctx;
1199                         matched = pdn.bv_val;
1200                 }
1201                 rs->sr_matched = matched;
1202         }
1203
1204         if ( op->o_conn &&
1205                 ( ( sendok & LDAP_BACK_SENDOK )
1206                         || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1207         {
1208                 send_ldap_result( op, rs );
1209         }
1210         if ( matched ) {
1211                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1212         }
1213         if ( text ) {
1214                 ldap_memfree( text );
1215         }
1216         if ( rs->sr_ref ) {
1217                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1218                 rs->sr_ref = NULL;
1219         }
1220         if ( refs ) {
1221                 ber_memvfree( (void **)refs );
1222         }
1223         if ( ctrls ) {
1224                 assert( rs->sr_ctrls != NULL );
1225                 ldap_controls_free( ctrls );
1226         }
1227
1228         rs->sr_text = save_text;
1229         rs->sr_matched = save_matched;
1230         rs->sr_ref = save_ref;
1231         rs->sr_ctrls = save_ctrls;
1232
1233         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1234 }
1235
1236 /*
1237  * meta_back_proxy_authz_cred()
1238  *
1239  * prepares credentials & method for meta_back_proxy_authz_bind();
1240  * or, if method is SASL, performs the SASL bind directly.
1241  */
1242 int
1243 meta_back_proxy_authz_cred(
1244         metaconn_t              *mc,
1245         int                     candidate,
1246         Operation               *op,
1247         SlapReply               *rs,
1248         ldap_back_send_t        sendok,
1249         struct berval           *binddn,
1250         struct berval           *bindcred,
1251         int                     *method )
1252 {
1253         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1254         metatarget_t            *mt = mi->mi_targets[ candidate ];
1255         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1256         struct berval           ndn;
1257         int                     dobind = 0;
1258
1259         /* don't proxyAuthz if protocol is not LDAPv3 */
1260         switch ( mt->mt_version ) {
1261         case LDAP_VERSION3:
1262                 break;
1263
1264         case 0:
1265                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1266                         break;
1267                 }
1268                 /* fall thru */
1269
1270         default:
1271                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1272                 if ( sendok & LDAP_BACK_SENDERR ) {
1273                         send_ldap_result( op, rs );
1274                 }
1275                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1276                 goto done;
1277         }
1278
1279         if ( op->o_tag == LDAP_REQ_BIND ) {
1280                 ndn = op->o_req_ndn;
1281
1282         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1283                 ndn = op->o_conn->c_ndn;
1284
1285         } else {
1286                 ndn = op->o_ndn;
1287         }
1288
1289         /*
1290          * FIXME: we need to let clients use proxyAuthz
1291          * otherwise we cannot do symmetric pools of servers;
1292          * we have to live with the fact that a user can
1293          * authorize itself as any ID that is allowed
1294          * by the authzTo directive of the "proxyauthzdn".
1295          */
1296         /*
1297          * NOTE: current Proxy Authorization specification
1298          * and implementation do not allow proxy authorization
1299          * control to be provided with Bind requests
1300          */
1301         /*
1302          * if no bind took place yet, but the connection is bound
1303          * and the "proxyauthzdn" is set, then bind as
1304          * "proxyauthzdn" and explicitly add the proxyAuthz
1305          * control to every operation with the dn bound
1306          * to the connection as control value.
1307          */
1308
1309         /* bind as proxyauthzdn only if no idassert mode
1310          * is requested, or if the client's identity
1311          * is authorized */
1312         switch ( mt->mt_idassert_mode ) {
1313         case LDAP_BACK_IDASSERT_LEGACY:
1314                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1315                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1316                         {
1317                                 *binddn = mt->mt_idassert_authcDN;
1318                                 *bindcred = mt->mt_idassert_passwd;
1319                                 dobind = 1;
1320                         }
1321                 }
1322                 break;
1323
1324         default:
1325                 /* NOTE: rootdn can always idassert */
1326                 if ( BER_BVISNULL( &ndn )
1327                         && mt->mt_idassert_authz == NULL
1328                         && !( mt->mt_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
1329                 {
1330                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1331                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1332                                 if ( sendok & LDAP_BACK_SENDERR ) {
1333                                         send_ldap_result( op, rs );
1334                                 }
1335                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1336                                 goto done;
1337
1338                         }
1339
1340                         rs->sr_err = LDAP_SUCCESS;
1341                         *binddn = slap_empty_bv;
1342                         *bindcred = slap_empty_bv;
1343                         break;
1344
1345                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1346                         struct berval authcDN;
1347
1348                         if ( BER_BVISNULL( &ndn ) ) {
1349                                 authcDN = slap_empty_bv;
1350
1351                         } else {
1352                                 authcDN = ndn;
1353                         }
1354                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1355                                         &authcDN, &authcDN );
1356                         if ( rs->sr_err != LDAP_SUCCESS ) {
1357                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1358                                         if ( sendok & LDAP_BACK_SENDERR ) {
1359                                                 send_ldap_result( op, rs );
1360                                         }
1361                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1362                                         goto done;
1363                                 }
1364
1365                                 rs->sr_err = LDAP_SUCCESS;
1366                                 *binddn = slap_empty_bv;
1367                                 *bindcred = slap_empty_bv;
1368                                 break;
1369                         }
1370                 }
1371
1372                 *binddn = mt->mt_idassert_authcDN;
1373                 *bindcred = mt->mt_idassert_passwd;
1374                 dobind = 1;
1375                 break;
1376         }
1377
1378         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1379 #ifdef HAVE_CYRUS_SASL
1380                 void            *defaults = NULL;
1381                 struct berval   authzID = BER_BVNULL;
1382                 int             freeauthz = 0;
1383
1384                 /* if SASL supports native authz, prepare for it */
1385                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1386                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1387                 {
1388                         switch ( mt->mt_idassert_mode ) {
1389                         case LDAP_BACK_IDASSERT_OTHERID:
1390                         case LDAP_BACK_IDASSERT_OTHERDN:
1391                                 authzID = mt->mt_idassert_authzID;
1392                                 break;
1393
1394                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1395                                 BER_BVSTR( &authzID, "dn:" );
1396                                 break;
1397
1398                         case LDAP_BACK_IDASSERT_SELF:
1399                                 if ( BER_BVISNULL( &ndn ) ) {
1400                                         /* connection is not authc'd, so don't idassert */
1401                                         BER_BVSTR( &authzID, "dn:" );
1402                                         break;
1403                                 }
1404                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1405                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1406                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1407                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1408                                                 ndn.bv_val, ndn.bv_len + 1 );
1409                                 freeauthz = 1;
1410                                 break;
1411
1412                         default:
1413                                 break;
1414                         }
1415                 }
1416
1417                 if ( mt->mt_idassert_secprops != NULL ) {
1418                         rs->sr_err = ldap_set_option( msc->msc_ld,
1419                                 LDAP_OPT_X_SASL_SECPROPS,
1420                                 (void *)mt->mt_idassert_secprops );
1421
1422                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1423                                 rs->sr_err = LDAP_OTHER;
1424                                 if ( sendok & LDAP_BACK_SENDERR ) {
1425                                         send_ldap_result( op, rs );
1426                                 }
1427                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1428                                 goto done;
1429                         }
1430                 }
1431
1432                 defaults = lutil_sasl_defaults( msc->msc_ld,
1433                                 mt->mt_idassert_sasl_mech.bv_val,
1434                                 mt->mt_idassert_sasl_realm.bv_val,
1435                                 mt->mt_idassert_authcID.bv_val,
1436                                 mt->mt_idassert_passwd.bv_val,
1437                                 authzID.bv_val );
1438                 if ( defaults == NULL ) {
1439                         rs->sr_err = LDAP_OTHER;
1440                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1441                         if ( sendok & LDAP_BACK_SENDERR ) {
1442                                 send_ldap_result( op, rs );
1443                         }
1444                         goto done;
1445                 }
1446
1447                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1448                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1449                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1450                                 defaults );
1451
1452                 rs->sr_err = slap_map_api2result( rs );
1453                 if ( rs->sr_err != LDAP_SUCCESS ) {
1454                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1455                         if ( sendok & LDAP_BACK_SENDERR ) {
1456                                 send_ldap_result( op, rs );
1457                         }
1458
1459                 } else {
1460                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1461                 }
1462
1463                 lutil_sasl_freedefs( defaults );
1464                 if ( freeauthz ) {
1465                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1466                 }
1467
1468                 goto done;
1469 #endif /* HAVE_CYRUS_SASL */
1470         }
1471
1472         *method = mt->mt_idassert_authmethod;
1473         switch ( mt->mt_idassert_authmethod ) {
1474         case LDAP_AUTH_NONE:
1475                 BER_BVSTR( binddn, "" );
1476                 BER_BVSTR( bindcred, "" );
1477                 /* fallthru */
1478
1479         case LDAP_AUTH_SIMPLE:
1480                 break;
1481
1482         default:
1483                 /* unsupported! */
1484                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1485                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1486                 if ( sendok & LDAP_BACK_SENDERR ) {
1487                         send_ldap_result( op, rs );
1488                 }
1489                 break;
1490         }
1491
1492 done:;
1493         return rs->sr_err;
1494 }
1495
1496 static int
1497 meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1498 {
1499         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1500         metatarget_t            *mt = mi->mi_targets[ candidate ];
1501         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1502         struct berval           binddn = BER_BVC( "" ),
1503                                 cred = BER_BVC( "" );
1504         int                     method = LDAP_AUTH_NONE,
1505                                 rc;
1506
1507         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1508         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1509                 int     msgid;
1510
1511                 switch ( method ) {
1512                 case LDAP_AUTH_NONE:
1513                 case LDAP_AUTH_SIMPLE:
1514                         for (;;) {
1515                                 rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1516                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1517                                         &cred, NULL, NULL, &msgid );
1518                                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
1519                                         break;
1520                                 }
1521                                 ldap_pvt_thread_yield();
1522                         }
1523                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
1524                         if ( rc == LDAP_SUCCESS ) {
1525                                 /* set rebind stuff in case of successful proxyAuthz bind,
1526                                  * so that referral chasing is attempted using the right
1527                                  * identity */
1528                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1529                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1530
1531                                 if ( LDAP_BACK_SAVECRED( mi ) ) {
1532                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1533                                                 memset( msc->msc_cred.bv_val, 0,
1534                                                         msc->msc_cred.bv_len );
1535                                         }
1536                                         ber_bvreplace( &msc->msc_cred, &cred );
1537                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1538                                 }
1539                         }
1540                         break;
1541
1542                 default:
1543                         assert( 0 );
1544                         break;
1545                 }
1546         }
1547
1548         return LDAP_BACK_CONN_ISBOUND( msc );
1549 }
1550
1551 /*
1552  * Add controls;
1553  *
1554  * if any needs to be added, it is prepended to existing ones,
1555  * in a newly allocated array.  The companion function
1556  * ldap_back_controls_free() must be used to restore the original
1557  * status of op->o_ctrls.
1558  */
1559 int
1560 meta_back_controls_add(
1561                 Operation       *op,
1562                 SlapReply       *rs,
1563                 metaconn_t      *mc,
1564                 int             candidate,
1565                 LDAPControl     ***pctrls )
1566 {
1567         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1568         metatarget_t            *mt = mi->mi_targets[ candidate ];
1569         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1570
1571         LDAPControl             **ctrls = NULL;
1572         /* set to the maximum number of controls this backend can add */
1573         LDAPControl             c[ 2 ] = { 0 };
1574         int                     n = 0, i, j1 = 0, j2 = 0;
1575
1576         *pctrls = NULL;
1577
1578         rs->sr_err = LDAP_SUCCESS;
1579
1580         /* don't add controls if protocol is not LDAPv3 */
1581         switch ( mt->mt_version ) {
1582         case LDAP_VERSION3:
1583                 break;
1584
1585         case 0:
1586                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1587                         break;
1588                 }
1589                 /* fall thru */
1590
1591         default:
1592                 goto done;
1593         }
1594
1595         /* put controls that go __before__ existing ones here */
1596
1597         /* proxyAuthz for identity assertion */
1598         switch ( ldap_back_proxy_authz_ctrl( op, rs, &msc->msc_bound_ndn,
1599                 mt->mt_version, &mt->mt_idassert, &c[ j1 ] ) )
1600         {
1601         case SLAP_CB_CONTINUE:
1602                 break;
1603
1604         case LDAP_SUCCESS:
1605                 j1++;
1606                 break;
1607
1608         default:
1609                 goto done;
1610         }
1611
1612         /* put controls that go __after__ existing ones here */
1613
1614 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
1615         /* session tracking */
1616         if ( META_BACK_TGT_ST_REQUEST( mt ) ) {
1617                 switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) {
1618                 case SLAP_CB_CONTINUE:
1619                         break;
1620
1621                 case LDAP_SUCCESS:
1622                         j2++;
1623                         break;
1624
1625                 default:
1626                         goto done;
1627                 }
1628         }
1629 #endif /* SLAP_CONTROL_X_SESSION_TRACKING */
1630
1631         if ( rs->sr_err == SLAP_CB_CONTINUE ) {
1632                 rs->sr_err = LDAP_SUCCESS;
1633         }
1634
1635         /* if nothing to do, just bail out */
1636         if ( j1 == 0 && j2 == 0 ) {
1637                 goto done;
1638         }
1639
1640         assert( j1 + j1 <= sizeof( c )/sizeof(LDAPControl) );
1641
1642         if ( op->o_ctrls ) {
1643                 for ( n = 0; op->o_ctrls[ n ]; n++ )
1644                         /* just count ctrls */ ;
1645         }
1646
1647         ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ),
1648                         op->o_tmpmemctx );
1649         if ( j1 ) {
1650                 ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ];
1651                 *ctrls[ 0 ] = c[ 0 ];
1652                 for ( i = 1; i < j1; i++ ) {
1653                         ctrls[ i ] = &ctrls[ 0 ][ i ];
1654                         *ctrls[ i ] = c[ i ];
1655                 }
1656         }
1657
1658         i = 0;
1659         if ( op->o_ctrls ) {
1660                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1661                         ctrls[ i + j1 ] = op->o_ctrls[ i ];
1662                 }
1663         }
1664
1665         n += j1;
1666         if ( j2 ) {
1667                 ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1;
1668                 *ctrls[ n ] = c[ j1 ];
1669                 for ( i = 1; i < j2; i++ ) {
1670                         ctrls[ n + i ] = &ctrls[ n ][ i ];
1671                         *ctrls[ n + i ] = c[ i ];
1672                 }
1673         }
1674
1675         ctrls[ n + j2 ] = NULL;
1676
1677 done:;
1678         if ( ctrls == NULL ) {
1679                 ctrls = op->o_ctrls;
1680         }
1681
1682         *pctrls = ctrls;
1683
1684         return rs->sr_err;
1685 }
1686