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 1999-2008 The OpenLDAP Foundation.
   5  * Portions Copyright 2001-2003 Pierangelo Masarati.
   6  * Portions Copyright 1999-2003 Howard Chu.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted only as authorized by the OpenLDAP
  11  * Public License.
  12  *
  13  * A copy of this license is available in the file LICENSE in the
  14  * top-level directory of the distribution or, alternatively, at
  15  * <http://www.OpenLDAP.org/license.html>.
  16  */
  17 /* ACKNOWLEDGEMENTS:
  18  * This work was initially developed by the Howard Chu for inclusion
  19  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  20  * Masarati.
  21  */
  22
  23 #include "portable.h"
  24
  25 #include <stdio.h>
  26
  27 #include <ac/errno.h>
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30
  31
  32 #define AVL_INTERNAL
  33 #include "slap.h"
  34 #include "../back-ldap/back-ldap.h"
  35 #include "back-meta.h"
  36 #undef ldap_debug       /* silence a warning in ldap-int.h */
  37 #include "../../../libraries/libldap/ldap-int.h"
  38
  39 #include "lutil_ldap.h"
  40
  41 static int
  42 meta_back_proxy_authz_bind(
  43         metaconn_t              *mc,
  44         int                     candidate,
  45         Operation               *op,
  46         SlapReply               *rs,
  47         ldap_back_send_t        sendok );
  48
  49 static int
  50 meta_back_single_bind(
  51         Operation               *op,
  52         SlapReply               *rs,
  53         metaconn_t              *mc,
  54         int                     candidate );
  55
  56 int
  57 meta_back_bind( Operation *op, SlapReply *rs )
  58 {
  59         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
  60         metaconn_t      *mc = NULL;
  61
  62         int             rc = LDAP_OTHER,
  63                         i,
  64                         gotit = 0,
  65                         isroot = 0;
  66
  67         SlapReply       *candidates;
  68
  69         rs->sr_err = LDAP_SUCCESS;
  70
  71         Debug( LDAP_DEBUG_ARGS, "%s meta_back_bind: dn=\"%s\".\n",
  72                 op->o_log_prefix, op->o_req_dn.bv_val, 0 );
  73
  74         /* the test on the bind method should be superfluous */
  75         switch ( be_rootdn_bind( op, rs ) ) {
  76         case LDAP_SUCCESS:
  77                 if ( META_BACK_DEFER_ROOTDN_BIND( mi ) ) {
  78                         /* frontend will return success */
  79                         return rs->sr_err;
  80                 }
  81
  82                 isroot = 1;
  83                 /* fallthru */
  84
  85         case SLAP_CB_CONTINUE:
  86                 break;
  87
  88         default:
  89                 /* be_rootdn_bind() sent result */
  90                 return rs->sr_err;
  91         }
  92
  93         /* we need meta_back_getconn() not send result even on error,
  94          * because we want to intercept the error and make it
  95          * invalidCredentials */
  96         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_BIND_DONTSEND );
  97         if ( !mc ) {
  98                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
  99                         char    buf[ SLAP_TEXT_BUFLEN ];
 100
 101                         snprintf( buf, sizeof( buf ),
 102                                 "meta_back_bind: no target "
 103                                 "for dn \"%s\" (%d%s%s).",
 104                                 op->o_req_dn.bv_val, rs->sr_err,
 105                                 rs->sr_text ? ". " : "",
 106                                 rs->sr_text ? rs->sr_text : "" );
 107                         Debug( LDAP_DEBUG_ANY,
 108                                 "%s %s\n",
 109                                 op->o_log_prefix, buf, 0 );
 110                 }
 111
 112                 /* FIXME: there might be cases where we don't want
 113                  * to map the error onto invalidCredentials */
 114                 switch ( rs->sr_err ) {
 115                 case LDAP_NO_SUCH_OBJECT:
 116                 case LDAP_UNWILLING_TO_PERFORM:
 117                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 118                         rs->sr_text = NULL;
 119                         break;
 120                 }
 121                 send_ldap_result( op, rs );
 122                 return rs->sr_err;
 123         }
 124
 125         candidates = meta_back_candidates_get( op );
 126
 127         /*
 128          * Each target is scanned ...
 129          */
 130         mc->mc_authz_target = META_BOUND_NONE;
 131         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 132                 metatarget_t    *mt = mi->mi_targets[ i ];
 133                 int             lerr;
 134
 135                 /*
 136                  * Skip non-candidates
 137                  */
 138                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 139                         continue;
 140                 }
 141
 142                 if ( gotit == 0 ) {
 143                         /* set rc to LDAP_SUCCESS only if at least
 144                          * one candidate has been tried */
 145                         rc = LDAP_SUCCESS;
 146                         gotit = 1;
 147
 148                 } else if ( !isroot ) {
 149                         /*
 150                          * A bind operation is expected to have
 151                          * ONE CANDIDATE ONLY!
 152                          */
 153                         Debug( LDAP_DEBUG_ANY,
 154                                 "### %s meta_back_bind: more than one"
 155                                 " candidate selected...\n",
 156                                 op->o_log_prefix, 0, 0 );
 157                 }
 158
 159                 if ( isroot ) {
 160                         if ( mt->mt_idassert_authmethod == LDAP_AUTH_NONE
 161                                 || BER_BVISNULL( &mt->mt_idassert_authcDN ) )
 162                         {
 163                                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 164
 165                                 /* skip the target if no pseudorootdn is provided */
 166                                 if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 167                                         ch_free( msc->msc_bound_ndn.bv_val );
 168                                         BER_BVZERO( &msc->msc_bound_ndn );
 169                                 }
 170
 171                                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 172                                         /* destroy sensitive data */
 173                                         memset( msc->msc_cred.bv_val, 0,
 174                                                 msc->msc_cred.bv_len );
 175                                         ch_free( msc->msc_cred.bv_val );
 176                                         BER_BVZERO( &msc->msc_cred );
 177                                 }
 178
 179                                 continue;
 180                         }
 181
 182
 183                         (void)meta_back_proxy_authz_bind( mc, i, op, rs, LDAP_BACK_DONTSEND );
 184                         lerr = rs->sr_err;
 185
 186                 } else {
 187                         lerr = meta_back_single_bind( op, rs, mc, i );
 188                 }
 189
 190                 if ( lerr != LDAP_SUCCESS ) {
 191                         rc = rs->sr_err = lerr;
 192
 193                         /* FIXME: in some cases (e.g. unavailable)
 194                          * do not assume it's not candidate; rather
 195                          * mark this as an error to be eventually
 196                          * reported to client */
 197                         META_CANDIDATE_CLEAR( &candidates[ i ] );
 198                         break;
 199                 }
 200         }
 201
 202         /* must re-insert if local DN changed as result of bind */
 203         if ( rc == LDAP_SUCCESS ) {
 204                 if ( isroot ) {
 205                         mc->mc_authz_target = META_BOUND_ALL;
 206                 }
 207
 208                 if ( !LDAP_BACK_PCONN_ISPRIV( mc )
 209                         && !dn_match( &op->o_req_ndn, &mc->mc_local_ndn ) )
 210                 {
 211                         int             lerr;
 212
 213                         /* wait for all other ops to release the connection */
 214                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 215                         assert( mc->mc_refcnt == 1 );
 216 #if META_BACK_PRINT_CONNTREE > 0
 217                         meta_back_print_conntree( mi, ">>> meta_back_bind" );
 218 #endif /* META_BACK_PRINT_CONNTREE */
 219
 220                         /* delete all cached connections with the current connection */
 221                         if ( LDAP_BACK_SINGLECONN( mi ) ) {
 222                                 metaconn_t      *tmpmc;
 223
 224                                 while ( ( tmpmc = avl_delete( &mi->mi_conninfo.lai_tree, (caddr_t)mc, meta_back_conn_cmp ) ) != NULL )
 225                                 {
 226                                         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 0
 253                                 /* NOTE: a connection cannot be privileged
 254                                  * and be in the avl tree at the same time
 255                                  */
 256                                 if ( isroot ) {
 257                                         LDAP_BACK_CONN_ISPRIV_SET( mc );
 258                                         LDAP_BACK_PCONN_SET( mc, op );
 259                                 }
 260 #endif
 261                                 LDAP_BACK_CONN_CACHED_SET( mc );
 262
 263                         } else {
 264                                 LDAP_BACK_CONN_CACHED_CLEAR( mc );
 265                         }
 266                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 267                 }
 268         }
 269
 270         if ( mc != NULL ) {
 271                 meta_back_release_conn( mi, mc );
 272         }
 273
 274         /*
 275          * rc is LDAP_SUCCESS if at least one bind succeeded,
 276          * err is the last error that occurred during a bind;
 277          * if at least (and at most?) one bind succeeds, fine.
 278          */
 279         if ( rc != LDAP_SUCCESS ) {
 280
 281                 /*
 282                  * deal with bind failure ...
 283                  */
 284
 285                 /*
 286                  * no target was found within the naming context,
 287                  * so bind must fail with invalid credentials
 288                  */
 289                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 290                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 291                 } else {
 292                         rs->sr_err = slap_map_api2result( rs );
 293                 }
 294                 send_ldap_result( op, rs );
 295                 return rs->sr_err;
 296
 297         }
 298
 299         return LDAP_SUCCESS;
 300 }
 301
 302 static int
 303 meta_back_bind_op_result(
 304         Operation               *op,
 305         SlapReply               *rs,
 306         metaconn_t              *mc,
 307         int                     candidate,
 308         int                     msgid,
 309         ldap_back_send_t        sendok )
 310 {
 311         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 312         metatarget_t            *mt = mi->mi_targets[ candidate ];
 313         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 314         LDAPMessage             *res;
 315         struct timeval          tv;
 316         int                     rc;
 317         int                     nretries = mt->mt_nretries;
 318         char                    buf[ SLAP_TEXT_BUFLEN ];
 319
 320         Debug( LDAP_DEBUG_TRACE,
 321                 ">>> %s meta_back_bind_op_result[%d]\n",
 322                 op->o_log_prefix, candidate, 0 );
 323
 324         /* make sure this is clean */
 325         assert( rs->sr_ctrls == NULL );
 326
 327         if ( rs->sr_err == LDAP_SUCCESS ) {
 328                 time_t          stoptime = (time_t)(-1),
 329                                 timeout;
 330                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 331                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 332                 const char      *timeout_text = "Operation timed out";
 333                 slap_op_t       opidx = slap_req2op( op->o_tag );
 334
 335                 /* since timeout is not specified, compute and use
 336                  * the one specific to the ongoing operation */
 337                 if ( opidx == LDAP_REQ_SEARCH ) {
 338                         if ( op->ors_tlimit <= 0 ) {
 339                                 timeout = 0;
 340
 341                         } else {
 342                                 timeout = op->ors_tlimit;
 343                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 344                                 timeout_text = NULL;
 345                         }
 346
 347                 } else {
 348                         timeout = mt->mt_timeout[ opidx ];
 349                 }
 350
 351                 /* better than nothing :) */
 352                 if ( timeout == 0 ) {
 353                         if ( mi->mi_idle_timeout ) {
 354                                 timeout = mi->mi_idle_timeout;
 355
 356                         } else if ( mi->mi_conn_ttl ) {
 357                                 timeout = mi->mi_conn_ttl;
 358                         }
 359                 }
 360
 361                 if ( timeout ) {
 362                         stoptime = op->o_time + timeout;
 363                 }
 364
 365                 LDAP_BACK_TV_SET( &tv );
 366
 367                 /*
 368                  * handle response!!!
 369                  */
 370 retry:;
 371                 rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
 372                 switch ( rc ) {
 373                 case 0:
 374                         if ( nretries != META_RETRY_NEVER
 375                                 || ( timeout && slap_get_time() <= stoptime ) )
 376                         {
 377                                 ldap_pvt_thread_yield();
 378                                 if ( nretries > 0 ) {
 379                                         nretries--;
 380                                 }
 381                                 tv = mt->mt_bind_timeout;
 382                                 goto retry;
 383                         }
 384
 385                         /* don't let anyone else use this handler,
 386                          * because there's a pending bind that will not
 387                          * be acknowledged */
 388                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 389                         assert( LDAP_BACK_CONN_BINDING( msc ) );
 390
 391 #ifdef DEBUG_205
 392                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_bind_op_result ldap_unbind_ext[%d] ld=%p\n",
 393                                 op->o_log_prefix, candidate, (void *)msc->msc_ld );
 394 #endif /* DEBUG_205 */
 395
 396                         meta_clear_one_candidate( op, mc, candidate );
 397                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 398
 399                         rs->sr_err = timeout_err;
 400                         rs->sr_text = timeout_text;
 401                         break;
 402
 403                 case -1:
 404                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 405                                 &rs->sr_err );
 406
 407                         snprintf( buf, sizeof( buf ),
 408                                 "err=%d (%s) nretries=%d",
 409                                 rs->sr_err, ldap_err2string( rs->sr_err ), nretries );
 410                         Debug( LDAP_DEBUG_ANY,
 411                                 "### %s meta_back_bind_op_result[%d]: %s.\n",
 412                                 op->o_log_prefix, candidate, buf );
 413                         break;
 414
 415                 default:
 416                         /* only touch when activity actually took place... */
 417                         if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
 418                                 msc->msc_time = op->o_time;
 419                         }
 420
 421                         /* FIXME: matched? referrals? response controls? */
 422                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 423                                         NULL, NULL, NULL, NULL, 1 );
 424                         if ( rc != LDAP_SUCCESS ) {
 425                                 rs->sr_err = rc;
 426                         }
 427                         break;
 428                 }
 429         }
 430
 431         rs->sr_err = slap_map_api2result( rs );
 432
 433         Debug( LDAP_DEBUG_TRACE,
 434                 "<<< %s meta_back_bind_op_result[%d] err=%d\n",
 435                 op->o_log_prefix, candidate, rs->sr_err );
 436
 437         return rs->sr_err;
 438 }
 439
 440 /*
 441  * meta_back_single_bind
 442  *
 443  * attempts to perform a bind with creds
 444  */
 445 static int
 446 meta_back_single_bind(
 447         Operation               *op,
 448         SlapReply               *rs,
 449         metaconn_t              *mc,
 450         int                     candidate )
 451 {
 452         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 453         metatarget_t            *mt = mi->mi_targets[ candidate ];
 454         struct berval           mdn = BER_BVNULL;
 455         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 456         int                     msgid;
 457         dncookie                dc;
 458         struct berval           save_o_dn;
 459         int                     save_o_do_not_cache;
 460         LDAPControl             **ctrls = NULL;
 461
 462         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 463                 ch_free( msc->msc_bound_ndn.bv_val );
 464                 BER_BVZERO( &msc->msc_bound_ndn );
 465         }
 466
 467         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 468                 /* destroy sensitive data */
 469                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 470                 ch_free( msc->msc_cred.bv_val );
 471                 BER_BVZERO( &msc->msc_cred );
 472         }
 473
 474         /*
 475          * Rewrite the bind dn if needed
 476          */
 477         dc.target = mt;
 478         dc.conn = op->o_conn;
 479         dc.rs = rs;
 480         dc.ctx = "bindDN";
 481
 482         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 483                 rs->sr_text = "DN rewrite error";
 484                 rs->sr_err = LDAP_OTHER;
 485                 return rs->sr_err;
 486         }
 487
 488         /* don't add proxyAuthz; set the bindDN */
 489         save_o_dn = op->o_dn;
 490         save_o_do_not_cache = op->o_do_not_cache;
 491         op->o_do_not_cache = 1;
 492         op->o_dn = op->o_req_dn;
 493
 494         ctrls = op->o_ctrls;
 495         rs->sr_err = meta_back_controls_add( op, rs, mc, candidate, &ctrls );
 496         op->o_dn = save_o_dn;
 497         op->o_do_not_cache = save_o_do_not_cache;
 498         if ( rs->sr_err != LDAP_SUCCESS ) {
 499                 goto return_results;
 500         }
 501
 502         /* FIXME: this fixes the bind problem right now; we need
 503          * to use the asynchronous version to get the "matched"
 504          * and more in case of failure ... */
 505         /* FIXME: should we check if at least some of the op->o_ctrls
 506          * can/should be passed? */
 507         for (;;) {
 508                 rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 509                         LDAP_SASL_SIMPLE, &op->orb_cred,
 510                         ctrls, NULL, &msgid );
 511                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
 512                         break;
 513                 }
 514                 ldap_pvt_thread_yield();
 515         }
 516
 517         mi->mi_ldap_extra->controls_free( op, rs, &ctrls );
 518
 519         meta_back_bind_op_result( op, rs, mc, candidate, msgid, LDAP_BACK_DONTSEND );
 520         if ( rs->sr_err != LDAP_SUCCESS ) {
 521                 goto return_results;
 522         }
 523
 524         /* If defined, proxyAuthz will be used also when
 525          * back-ldap is the authorizing backend; for this
 526          * purpose, a successful bind is followed by a
 527          * bind with the configured identity assertion */
 528         /* NOTE: use with care */
 529         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 530                 meta_back_proxy_authz_bind( mc, candidate, op, rs, LDAP_BACK_SENDERR );
 531                 if ( !LDAP_BACK_CONN_ISBOUND( msc ) ) {
 532                         goto return_results;
 533                 }
 534                 goto cache_refresh;
 535         }
 536
 537         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_ndn );
 538         LDAP_BACK_CONN_ISBOUND_SET( msc );
 539         mc->mc_authz_target = candidate;
 540
 541         if ( LDAP_BACK_SAVECRED( mi ) ) {
 542                 if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 543                         memset( msc->msc_cred.bv_val, 0,
 544                                 msc->msc_cred.bv_len );
 545                 }
 546                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 547                 ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
 548         }
 549
 550 cache_refresh:;
 551         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 552                         && !BER_BVISEMPTY( &op->o_req_ndn ) )
 553         {
 554                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 555                                 &op->o_req_ndn, candidate );
 556         }
 557
 558 return_results:;
 559         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 560                 free( mdn.bv_val );
 561         }
 562
 563         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 564                 meta_back_quarantine( op, rs, candidate );
 565         }
 566
 567         return rs->sr_err;
 568 }
 569
 570 /*
 571  * meta_back_single_dobind
 572  */
 573 int
 574 meta_back_single_dobind(
 575         Operation               *op,
 576         SlapReply               *rs,
 577         metaconn_t              **mcp,
 578         int                     candidate,
 579         ldap_back_send_t        sendok,
 580         int                     nretries,
 581         int                     dolock )
 582 {
 583         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 584         metatarget_t            *mt = mi->mi_targets[ candidate ];
 585         metaconn_t              *mc = *mcp;
 586         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 587         static struct berval    cred = BER_BVC( "" );
 588         int                     msgid;
 589
 590         assert( !LDAP_BACK_CONN_ISBOUND( msc ) );
 591
 592         /* NOTE: this obsoletes pseudorootdn */
 593         if ( op->o_conn != NULL &&
 594                 !op->o_do_not_cache &&
 595                 ( BER_BVISNULL( &msc->msc_bound_ndn ) ||
 596                         BER_BVISEMPTY( &msc->msc_bound_ndn ) ||
 597                         ( LDAP_BACK_CONN_ISPRIV( mc ) && dn_match( &msc->msc_bound_ndn, &mt->mt_idassert_authcDN ) ) ||
 598                         ( mt->mt_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) )
 599         {
 600                 (void)meta_back_proxy_authz_bind( mc, candidate, op, rs, sendok );
 601
 602         } else {
 603
 604                 /* FIXME: should we check if at least some of the op->o_ctrls
 605                  * can/should be passed? */
 606                 for (;;) {
 607                         rs->sr_err = ldap_sasl_bind( msc->msc_ld,
 608                                 "", LDAP_SASL_SIMPLE, &cred,
 609                                 NULL, NULL, &msgid );
 610                         if ( rs->sr_err != LDAP_X_CONNECTING ) {
 611                                 break;
 612                         }
 613                         ldap_pvt_thread_yield();
 614                 }
 615
 616                 rs->sr_err = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
 617         }
 618
 619         if ( rs->sr_err != LDAP_SUCCESS ) {
 620                 if ( dolock ) {
 621                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 622                 }
 623                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 624                 if ( META_BACK_ONERR_STOP( mi ) ) {
 625                         LDAP_BACK_CONN_TAINTED_SET( mc );
 626                         meta_back_release_conn_lock( mi, mc, 0 );
 627                         *mcp = NULL;
 628                 }
 629                 if ( dolock ) {
 630                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 631                 }
 632         }
 633
 634         if ( META_BACK_TGT_QUARANTINE( mt ) ) {
 635                 meta_back_quarantine( op, rs, candidate );
 636         }
 637
 638         return rs->sr_err;
 639 }
 640
 641 /*
 642  * meta_back_dobind
 643  */
 644 int
 645 meta_back_dobind(
 646         Operation               *op,
 647         SlapReply               *rs,
 648         metaconn_t              *mc,
 649         ldap_back_send_t        sendok )
 650 {
 651         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 652
 653         int                     bound = 0,
 654                                 i,
 655                                 isroot = 0;
 656
 657         SlapReply               *candidates;
 658
 659         if ( be_isroot( op ) ) {
 660                 isroot = 1;
 661         }
 662
 663         Debug( LDAP_DEBUG_TRACE,
 664                 "%s meta_back_dobind: conn=%ld%s\n",
 665                 op->o_log_prefix,
 666                 LDAP_BACK_PCONN_ID( mc ),
 667                 isroot ? " (isroot)" : "" );
 668
 669         /*
 670          * all the targets are bound as pseudoroot
 671          */
 672         if ( mc->mc_authz_target == META_BOUND_ALL ) {
 673                 bound = 1;
 674                 goto done;
 675         }
 676
 677         candidates = meta_back_candidates_get( op );
 678
 679         for ( i = 0; i < mi->mi_ntargets; i++ ) {
 680                 metatarget_t            *mt = mi->mi_targets[ i ];
 681                 metasingleconn_t        *msc = &mc->mc_conns[ i ];
 682                 int                     rc;
 683
 684                 /*
 685                  * Not a candidate
 686                  */
 687                 if ( !META_IS_CANDIDATE( &candidates[ i ] ) ) {
 688                         continue;
 689                 }
 690
 691                 assert( msc->msc_ld != NULL );
 692
 693                 /*
 694                  * If the target is already bound it is skipped
 695                  */
 696
 697 retry_binding:;
 698                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 699                 if ( LDAP_BACK_CONN_ISBOUND( msc )
 700                         || ( LDAP_BACK_CONN_ISANON( msc )
 701                                 && mt->mt_idassert_authmethod == LDAP_AUTH_NONE ) )
 702                 {
 703                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 704                         ++bound;
 705                         continue;
 706
 707                 } else if ( META_BACK_CONN_CREATING( msc ) || LDAP_BACK_CONN_BINDING( msc ) )
 708                 {
 709                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 710                         ldap_pvt_thread_yield();
 711                         goto retry_binding;
 712
 713                 }
 714
 715                 LDAP_BACK_CONN_BINDING_SET( msc );
 716                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 717
 718                 rc = meta_back_single_dobind( op, rs, &mc, i,
 719                         LDAP_BACK_DONTSEND, mt->mt_nretries, 1 );
 720                 /*
 721                  * NOTE: meta_back_single_dobind() already retries;
 722                  * in case of failure, it resets mc...
 723                  */
 724                 if ( rc != LDAP_SUCCESS ) {
 725                         char            buf[ SLAP_TEXT_BUFLEN ];
 726
 727                         if ( mc == NULL ) {
 728                                 /* meta_back_single_dobind() already sent
 729                                  * response and released connection */
 730                                 goto send_err;
 731                         }
 732
 733
 734                         if ( rc == LDAP_UNAVAILABLE ) {
 735                                 /* FIXME: meta_back_retry() already re-calls
 736                                  * meta_back_single_dobind() */
 737                                 if ( meta_back_retry( op, rs, &mc, i, sendok ) ) {
 738                                         goto retry_ok;
 739                                 }
 740
 741                                 if ( mc != NULL ) {
 742                                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 743                                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 744                                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 745                                         meta_back_release_conn( mi, mc );
 746                                 }
 747
 748                                 return 0;
 749                         }
 750
 751                         ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 752                         LDAP_BACK_CONN_BINDING_CLEAR( msc );
 753                         ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 754
 755                         snprintf( buf, sizeof( buf ),
 756                                 "meta_back_dobind[%d]: (%s) err=%d (%s).",
 757                                 i, isroot ? op->o_bd->be_rootdn.bv_val : "anonymous",
 758                                 rc, ldap_err2string( rc ) );
 759                         Debug( LDAP_DEBUG_ANY,
 760                                 "%s %s\n",
 761                                 op->o_log_prefix, buf, 0 );
 762
 763                         /*
 764                          * null cred bind should always succeed
 765                          * as anonymous, so a failure means
 766                          * the target is no longer candidate possibly
 767                          * due to technical reasons (remote host down?)
 768                          * so better clear the handle
 769                          */
 770                         /* leave the target candidate, but record the error for later use */
 771                         candidates[ i ].sr_err = rc;
 772                         if ( META_BACK_ONERR_STOP( mi ) ) {
 773                                 bound = 0;
 774                                 goto done;
 775                         }
 776
 777                         continue;
 778                 } /* else */
 779
 780 retry_ok:;
 781                 Debug( LDAP_DEBUG_TRACE,
 782                         "%s meta_back_dobind[%d]: "
 783                         "(%s)\n",
 784                         op->o_log_prefix, i,
 785                         isroot ? op->o_bd->be_rootdn.bv_val : "anonymous" );
 786
 787                 ldap_pvt_thread_mutex_lock( &mi->mi_conninfo.lai_mutex );
 788                 LDAP_BACK_CONN_BINDING_CLEAR( msc );
 789                 if ( isroot ) {
 790                         LDAP_BACK_CONN_ISBOUND_SET( msc );
 791                 } else {
 792                         LDAP_BACK_CONN_ISANON_SET( msc );
 793                 }
 794                 ldap_pvt_thread_mutex_unlock( &mi->mi_conninfo.lai_mutex );
 795                 ++bound;
 796         }
 797
 798 done:;
 799         Debug( LDAP_DEBUG_TRACE,
 800                 "%s meta_back_dobind: conn=%ld bound=%d\n",
 801                 op->o_log_prefix, LDAP_BACK_PCONN_ID( mc ), bound );
 802
 803         if ( bound == 0 ) {
 804                 meta_back_release_conn( mi, mc );
 805
 806 send_err:;
 807                 if ( sendok & LDAP_BACK_SENDERR ) {
 808                         if ( rs->sr_err == LDAP_SUCCESS ) {
 809                                 rs->sr_err = LDAP_BUSY;
 810                         }
 811                         send_ldap_result( op, rs );
 812                 }
 813
 814                 return 0;
 815         }
 816
 817         return ( bound > 0 );
 818 }
 819
 820 /*
 821  * meta_back_default_rebind
 822  *
 823  * This is a callback used for chasing referrals using the same
 824  * credentials as the original user on this session.
 825  */
 826 int
 827 meta_back_default_rebind(
 828         LDAP                    *ld,
 829         LDAP_CONST char         *url,
 830         ber_tag_t               request,
 831         ber_int_t               msgid,
 832         void                    *params )
 833 {
 834         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 835
 836         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 837                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 838                         NULL, NULL, NULL );
 839 }
 840
 841 /*
 842  * meta_back_default_urllist
 843  *
 844  * This is a callback used for mucking with the urllist
 845  */
 846 int
 847 meta_back_default_urllist(
 848         LDAP            *ld,
 849         LDAPURLDesc     **urllist,
 850         LDAPURLDesc     **url,
 851         void            *params )
 852 {
 853         metatarget_t    *mt = (metatarget_t *)params;
 854         LDAPURLDesc     **urltail;
 855
 856         if ( urllist == url ) {
 857                 return LDAP_SUCCESS;
 858         }
 859
 860         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
 861                 /* count */ ;
 862
 863         *urltail = *urllist;
 864         *urllist = *url;
 865         *url = NULL;
 866
 867         ldap_pvt_thread_mutex_lock( &mt->mt_uri_mutex );
 868         if ( mt->mt_uri ) {
 869                 ch_free( mt->mt_uri );
 870         }
 871
 872         ldap_get_option( ld, LDAP_OPT_URI, (void *)&mt->mt_uri );
 873         ldap_pvt_thread_mutex_unlock( &mt->mt_uri_mutex );
 874
 875         return LDAP_SUCCESS;
 876 }
 877
 878 int
 879 meta_back_cancel(
 880         metaconn_t              *mc,
 881         Operation               *op,
 882         SlapReply               *rs,
 883         ber_int_t               msgid,
 884         int                     candidate,
 885         ldap_back_send_t        sendok )
 886 {
 887         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
 888
 889         metatarget_t            *mt = mi->mi_targets[ candidate ];
 890         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 891
 892         int                     rc = LDAP_OTHER;
 893
 894         Debug( LDAP_DEBUG_TRACE, ">>> %s meta_back_cancel[%d] msgid=%d\n",
 895                 op->o_log_prefix, candidate, msgid );
 896
 897         /* default behavior */
 898         if ( META_BACK_TGT_ABANDON( mt ) ) {
 899                 rc = ldap_abandon_ext( msc->msc_ld, msgid, NULL, NULL );
 900
 901         } else if ( META_BACK_TGT_IGNORE( mt ) ) {
 902                 rc = ldap_pvt_discard( msc->msc_ld, msgid );
 903
 904         } else if ( META_BACK_TGT_CANCEL( mt ) ) {
 905                 rc = ldap_cancel_s( msc->msc_ld, msgid, NULL, NULL );
 906
 907         } else {
 908                 assert( 0 );
 909         }
 910
 911         Debug( LDAP_DEBUG_TRACE, "<<< %s meta_back_cancel[%d] err=%d\n",
 912                 op->o_log_prefix, candidate, rc );
 913
 914         return rc;
 915 }
 916
 917
 918
 919 /*
 920  * FIXME: error return must be handled in a cleaner way ...
 921  */
 922 int
 923 meta_back_op_result(
 924         metaconn_t              *mc,
 925         Operation               *op,
 926         SlapReply               *rs,
 927         int                     candidate,
 928         ber_int_t               msgid,
 929         time_t                  timeout,
 930         ldap_back_send_t        sendok )
 931 {
 932         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
 933
 934         const char      *save_text = rs->sr_text,
 935                         *save_matched = rs->sr_matched;
 936         BerVarray       save_ref = rs->sr_ref;
 937         LDAPControl     **save_ctrls = rs->sr_ctrls;
 938         void            *matched_ctx = NULL;
 939
 940         char            *matched = NULL;
 941         char            *text = NULL;
 942         char            **refs = NULL;
 943         LDAPControl     **ctrls = NULL;
 944
 945         assert( mc != NULL );
 946
 947         rs->sr_text = NULL;
 948         rs->sr_matched = NULL;
 949         rs->sr_ref = NULL;
 950         rs->sr_ctrls = NULL;
 951
 952         if ( candidate != META_TARGET_NONE ) {
 953                 metatarget_t            *mt = mi->mi_targets[ candidate ];
 954                 metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 955
 956 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
 957
 958                 if ( ERR_OK( rs->sr_err ) ) {
 959                         int             rc;
 960                         struct timeval  tv;
 961                         LDAPMessage     *res = NULL;
 962                         time_t          stoptime = (time_t)(-1);
 963                         int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
 964                                                 LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
 965                         const char      *timeout_text = "Operation timed out";
 966
 967                         /* if timeout is not specified, compute and use
 968                          * the one specific to the ongoing operation */
 969                         if ( timeout == (time_t)(-1) ) {
 970                                 slap_op_t       opidx = slap_req2op( op->o_tag );
 971
 972                                 if ( opidx == SLAP_OP_SEARCH ) {
 973                                         if ( op->ors_tlimit <= 0 ) {
 974                                                 timeout = 0;
 975
 976                                         } else {
 977                                                 timeout = op->ors_tlimit;
 978                                                 timeout_err = LDAP_TIMELIMIT_EXCEEDED;
 979                                                 timeout_text = NULL;
 980                                         }
 981
 982                                 } else {
 983                                         timeout = mt->mt_timeout[ opidx ];
 984                                 }
 985                         }
 986
 987                         /* better than nothing :) */
 988                         if ( timeout == 0 ) {
 989                                 if ( mi->mi_idle_timeout ) {
 990                                         timeout = mi->mi_idle_timeout;
 991
 992                                 } else if ( mi->mi_conn_ttl ) {
 993                                         timeout = mi->mi_conn_ttl;
 994                                 }
 995                         }
 996
 997                         if ( timeout ) {
 998                                 stoptime = op->o_time + timeout;
 999                         }
1000
1001                         LDAP_BACK_TV_SET( &tv );
1002
1003 retry:;
1004                         rc = ldap_result( msc->msc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1005                         switch ( rc ) {
1006                         case 0:
1007                                 if ( timeout && slap_get_time() > stoptime ) {
1008                                         (void)meta_back_cancel( mc, op, rs, msgid, candidate, sendok );
1009                                         rs->sr_err = timeout_err;
1010                                         rs->sr_text = timeout_text;
1011                                         break;
1012                                 }
1013
1014                                 LDAP_BACK_TV_SET( &tv );
1015                                 ldap_pvt_thread_yield();
1016                                 goto retry;
1017
1018                         case -1:
1019                                 ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE,
1020                                                 &rs->sr_err );
1021                                 break;
1022
1023
1024                         /* otherwise get the result; if it is not
1025                          * LDAP_SUCCESS, record it in the reply
1026                          * structure (this includes
1027                          * LDAP_COMPARE_{TRUE|FALSE}) */
1028                         default:
1029                                 /* only touch when activity actually took place... */
1030                                 if ( mi->mi_idle_timeout != 0 && msc->msc_time < op->o_time ) {
1031                                         msc->msc_time = op->o_time;
1032                                 }
1033
1034                                 rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
1035                                                 &matched, &text, &refs, &ctrls, 1 );
1036                                 res = NULL;
1037                                 rs->sr_text = text;
1038                                 if ( rc != LDAP_SUCCESS ) {
1039                                         rs->sr_err = rc;
1040                                 }
1041
1042                                 /* RFC 4511: referrals can only appear
1043                                  * if result code is LDAP_REFERRAL */
1044                                 if ( refs != NULL
1045                                         && refs[ 0 ] != NULL
1046                                         && refs[ 0 ][ 0 ] != '\0' )
1047                                 {
1048                                         if ( rs->sr_err != LDAP_REFERRAL ) {
1049                                                 Debug( LDAP_DEBUG_ANY,
1050                                                         "%s meta_back_op_result[%d]: "
1051                                                         "got referrals with err=%d\n",
1052                                                         op->o_log_prefix,
1053                                                         candidate, rs->sr_err );
1054
1055                                         } else {
1056                                                 int     i;
1057
1058                                                 for ( i = 0; refs[ i ] != NULL; i++ )
1059                                                         /* count */ ;
1060                                                 rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1061                                                         op->o_tmpmemctx );
1062                                                 for ( i = 0; refs[ i ] != NULL; i++ ) {
1063                                                         ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1064                                                 }
1065                                                 BER_BVZERO( &rs->sr_ref[ i ] );
1066                                         }
1067
1068                                 } else if ( rs->sr_err == LDAP_REFERRAL ) {
1069                                         Debug( LDAP_DEBUG_ANY,
1070                                                 "%s meta_back_op_result[%d]: "
1071                                                 "got err=%d with null "
1072                                                 "or empty referrals\n",
1073                                                 op->o_log_prefix,
1074                                                 candidate, rs->sr_err );
1075
1076                                         rs->sr_err = LDAP_NO_SUCH_OBJECT;
1077                                 }
1078
1079                                 if ( ctrls != NULL ) {
1080                                         rs->sr_ctrls = ctrls;
1081                                 }
1082                         }
1083
1084                         assert( res == NULL );
1085                 }
1086
1087                 /* if the error in the reply structure is not
1088                  * LDAP_SUCCESS, try to map it from client
1089                  * to server error */
1090                 if ( !ERR_OK( rs->sr_err ) ) {
1091                         rs->sr_err = slap_map_api2result( rs );
1092
1093                         /* internal ops ( op->o_conn == NULL )
1094                          * must not reply to client */
1095                         if ( op->o_conn && !op->o_do_not_cache && matched ) {
1096
1097                                 /* record the (massaged) matched
1098                                  * DN into the reply structure */
1099                                 rs->sr_matched = matched;
1100                         }
1101                 }
1102
1103                 if ( META_BACK_TGT_QUARANTINE( mt ) ) {
1104                         meta_back_quarantine( op, rs, candidate );
1105                 }
1106
1107         } else {
1108                 int     i,
1109                         err = rs->sr_err;
1110
1111                 for ( i = 0; i < mi->mi_ntargets; i++ ) {
1112                         metasingleconn_t        *msc = &mc->mc_conns[ i ];
1113                         char                    *xtext = NULL;
1114                         char                    *xmatched = NULL;
1115
1116                         rs->sr_err = LDAP_SUCCESS;
1117
1118                         ldap_get_option( msc->msc_ld, LDAP_OPT_RESULT_CODE, &rs->sr_err );
1119                         if ( rs->sr_err != LDAP_SUCCESS ) {
1120                                 /*
1121                                  * better check the type of error. In some cases
1122                                  * (search ?) it might be better to return a
1123                                  * success if at least one of the targets gave
1124                                  * positive result ...
1125                                  */
1126                                 ldap_get_option( msc->msc_ld,
1127                                                 LDAP_OPT_DIAGNOSTIC_MESSAGE, &xtext );
1128                                 if ( xtext != NULL && xtext [ 0 ] == '\0' ) {
1129                                         ldap_memfree( xtext );
1130                                         xtext = NULL;
1131                                 }
1132
1133                                 ldap_get_option( msc->msc_ld,
1134                                                 LDAP_OPT_MATCHED_DN, &xmatched );
1135                                 if ( xmatched != NULL && xmatched[ 0 ] == '\0' ) {
1136                                         ldap_memfree( xmatched );
1137                                         xmatched = NULL;
1138                                 }
1139
1140                                 rs->sr_err = slap_map_api2result( rs );
1141
1142                                 if ( LogTest( LDAP_DEBUG_ANY ) ) {
1143                                         char    buf[ SLAP_TEXT_BUFLEN ];
1144
1145                                         snprintf( buf, sizeof( buf ),
1146                                                 "meta_back_op_result[%d] "
1147                                                 "err=%d text=\"%s\" matched=\"%s\"",
1148                                                 i, rs->sr_err,
1149                                                 ( xtext ? xtext : "" ),
1150                                                 ( xmatched ? xmatched : "" ) );
1151                                         Debug( LDAP_DEBUG_ANY, "%s %s.\n",
1152                                                 op->o_log_prefix, buf, 0 );
1153                                 }
1154
1155                                 /*
1156                                  * FIXME: need to rewrite "match" (need rwinfo)
1157                                  */
1158                                 switch ( rs->sr_err ) {
1159                                 default:
1160                                         err = rs->sr_err;
1161                                         if ( xtext != NULL ) {
1162                                                 if ( text ) {
1163                                                         ldap_memfree( text );
1164                                                 }
1165                                                 text = xtext;
1166                                                 xtext = NULL;
1167                                         }
1168                                         if ( xmatched != NULL ) {
1169                                                 if ( matched ) {
1170                                                         ldap_memfree( matched );
1171                                                 }
1172                                                 matched = xmatched;
1173                                                 xmatched = NULL;
1174                                         }
1175                                         break;
1176                                 }
1177
1178                                 if ( xtext ) {
1179                                         ldap_memfree( xtext );
1180                                 }
1181
1182                                 if ( xmatched ) {
1183                                         ldap_memfree( xmatched );
1184                                 }
1185                         }
1186
1187                         if ( META_BACK_TGT_QUARANTINE( mi->mi_targets[ i ] ) ) {
1188                                 meta_back_quarantine( op, rs, i );
1189                         }
1190                 }
1191
1192                 if ( err != LDAP_SUCCESS ) {
1193                         rs->sr_err = err;
1194                 }
1195         }
1196
1197         if ( matched != NULL ) {
1198                 struct berval   dn, pdn;
1199
1200                 ber_str2bv( matched, 0, 0, &dn );
1201                 if ( dnPretty( NULL, &dn, &pdn, op->o_tmpmemctx ) == LDAP_SUCCESS ) {
1202                         ldap_memfree( matched );
1203                         matched_ctx = op->o_tmpmemctx;
1204                         matched = pdn.bv_val;
1205                 }
1206                 rs->sr_matched = matched;
1207         }
1208
1209         if ( op->o_conn &&
1210                 ( ( sendok & LDAP_BACK_SENDOK )
1211                         || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1212         {
1213                 send_ldap_result( op, rs );
1214         }
1215         if ( matched ) {
1216                 op->o_tmpfree( (char *)rs->sr_matched, matched_ctx );
1217         }
1218         if ( text ) {
1219                 ldap_memfree( text );
1220         }
1221         if ( rs->sr_ref ) {
1222                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1223                 rs->sr_ref = NULL;
1224         }
1225         if ( refs ) {
1226                 ber_memvfree( (void **)refs );
1227         }
1228         if ( ctrls ) {
1229                 assert( rs->sr_ctrls != NULL );
1230                 ldap_controls_free( ctrls );
1231         }
1232
1233         rs->sr_text = save_text;
1234         rs->sr_matched = save_matched;
1235         rs->sr_ref = save_ref;
1236         rs->sr_ctrls = save_ctrls;
1237
1238         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1239 }
1240
1241 /*
1242  * meta_back_proxy_authz_cred()
1243  *
1244  * prepares credentials & method for meta_back_proxy_authz_bind();
1245  * or, if method is SASL, performs the SASL bind directly.
1246  */
1247 int
1248 meta_back_proxy_authz_cred(
1249         metaconn_t              *mc,
1250         int                     candidate,
1251         Operation               *op,
1252         SlapReply               *rs,
1253         ldap_back_send_t        sendok,
1254         struct berval           *binddn,
1255         struct berval           *bindcred,
1256         int                     *method )
1257 {
1258         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1259         metatarget_t            *mt = mi->mi_targets[ candidate ];
1260         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1261         struct berval           ndn;
1262         int                     dobind = 0;
1263
1264         /* don't proxyAuthz if protocol is not LDAPv3 */
1265         switch ( mt->mt_version ) {
1266         case LDAP_VERSION3:
1267                 break;
1268
1269         case 0:
1270                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1271                         break;
1272                 }
1273                 /* fall thru */
1274
1275         default:
1276                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1277                 if ( sendok & LDAP_BACK_SENDERR ) {
1278                         send_ldap_result( op, rs );
1279                 }
1280                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1281                 goto done;
1282         }
1283
1284         if ( op->o_tag == LDAP_REQ_BIND ) {
1285                 ndn = op->o_req_ndn;
1286
1287         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1288                 ndn = op->o_conn->c_ndn;
1289
1290         } else {
1291                 ndn = op->o_ndn;
1292         }
1293
1294         /*
1295          * FIXME: we need to let clients use proxyAuthz
1296          * otherwise we cannot do symmetric pools of servers;
1297          * we have to live with the fact that a user can
1298          * authorize itself as any ID that is allowed
1299          * by the authzTo directive of the "proxyauthzdn".
1300          */
1301         /*
1302          * NOTE: current Proxy Authorization specification
1303          * and implementation do not allow proxy authorization
1304          * control to be provided with Bind requests
1305          */
1306         /*
1307          * if no bind took place yet, but the connection is bound
1308          * and the "proxyauthzdn" is set, then bind as
1309          * "proxyauthzdn" and explicitly add the proxyAuthz
1310          * control to every operation with the dn bound
1311          * to the connection as control value.
1312          */
1313
1314         /* bind as proxyauthzdn only if no idassert mode
1315          * is requested, or if the client's identity
1316          * is authorized */
1317         switch ( mt->mt_idassert_mode ) {
1318         case LDAP_BACK_IDASSERT_LEGACY:
1319                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1320                         if ( !BER_BVISNULL( &mt->mt_idassert_authcDN ) && !BER_BVISEMPTY( &mt->mt_idassert_authcDN ) )
1321                         {
1322                                 *binddn = mt->mt_idassert_authcDN;
1323                                 *bindcred = mt->mt_idassert_passwd;
1324                                 dobind = 1;
1325                         }
1326                 }
1327                 break;
1328
1329         default:
1330                 /* NOTE: rootdn can always idassert */
1331                 if ( BER_BVISNULL( &ndn )
1332                         && mt->mt_idassert_authz == NULL
1333                         && !( mt->mt_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
1334                 {
1335                         if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1336                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1337                                 if ( sendok & LDAP_BACK_SENDERR ) {
1338                                         send_ldap_result( op, rs );
1339                                 }
1340                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1341                                 goto done;
1342
1343                         }
1344
1345                         rs->sr_err = LDAP_SUCCESS;
1346                         *binddn = slap_empty_bv;
1347                         *bindcred = slap_empty_bv;
1348                         break;
1349
1350                 } else if ( mt->mt_idassert_authz && !be_isroot( op ) ) {
1351                         struct berval authcDN;
1352
1353                         if ( BER_BVISNULL( &ndn ) ) {
1354                                 authcDN = slap_empty_bv;
1355
1356                         } else {
1357                                 authcDN = ndn;
1358                         }
1359                         rs->sr_err = slap_sasl_matches( op, mt->mt_idassert_authz,
1360                                         &authcDN, &authcDN );
1361                         if ( rs->sr_err != LDAP_SUCCESS ) {
1362                                 if ( mt->mt_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1363                                         if ( sendok & LDAP_BACK_SENDERR ) {
1364                                                 send_ldap_result( op, rs );
1365                                         }
1366                                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1367                                         goto done;
1368                                 }
1369
1370                                 rs->sr_err = LDAP_SUCCESS;
1371                                 *binddn = slap_empty_bv;
1372                                 *bindcred = slap_empty_bv;
1373                                 break;
1374                         }
1375                 }
1376
1377                 *binddn = mt->mt_idassert_authcDN;
1378                 *bindcred = mt->mt_idassert_passwd;
1379                 dobind = 1;
1380                 break;
1381         }
1382
1383         if ( dobind && mt->mt_idassert_authmethod == LDAP_AUTH_SASL ) {
1384 #ifdef HAVE_CYRUS_SASL
1385                 void            *defaults = NULL;
1386                 struct berval   authzID = BER_BVNULL;
1387                 int             freeauthz = 0;
1388
1389                 /* if SASL supports native authz, prepare for it */
1390                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1391                                 ( mt->mt_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1392                 {
1393                         switch ( mt->mt_idassert_mode ) {
1394                         case LDAP_BACK_IDASSERT_OTHERID:
1395                         case LDAP_BACK_IDASSERT_OTHERDN:
1396                                 authzID = mt->mt_idassert_authzID;
1397                                 break;
1398
1399                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1400                                 BER_BVSTR( &authzID, "dn:" );
1401                                 break;
1402
1403                         case LDAP_BACK_IDASSERT_SELF:
1404                                 if ( BER_BVISNULL( &ndn ) ) {
1405                                         /* connection is not authc'd, so don't idassert */
1406                                         BER_BVSTR( &authzID, "dn:" );
1407                                         break;
1408                                 }
1409                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1410                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1411                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1412                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1413                                                 ndn.bv_val, ndn.bv_len + 1 );
1414                                 freeauthz = 1;
1415                                 break;
1416
1417                         default:
1418                                 break;
1419                         }
1420                 }
1421
1422                 if ( mt->mt_idassert_secprops != NULL ) {
1423                         rs->sr_err = ldap_set_option( msc->msc_ld,
1424                                 LDAP_OPT_X_SASL_SECPROPS,
1425                                 (void *)mt->mt_idassert_secprops );
1426
1427                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1428                                 rs->sr_err = LDAP_OTHER;
1429                                 if ( sendok & LDAP_BACK_SENDERR ) {
1430                                         send_ldap_result( op, rs );
1431                                 }
1432                                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1433                                 goto done;
1434                         }
1435                 }
1436
1437                 defaults = lutil_sasl_defaults( msc->msc_ld,
1438                                 mt->mt_idassert_sasl_mech.bv_val,
1439                                 mt->mt_idassert_sasl_realm.bv_val,
1440                                 mt->mt_idassert_authcID.bv_val,
1441                                 mt->mt_idassert_passwd.bv_val,
1442                                 authzID.bv_val );
1443                 if ( defaults == NULL ) {
1444                         rs->sr_err = LDAP_OTHER;
1445                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1446                         if ( sendok & LDAP_BACK_SENDERR ) {
1447                                 send_ldap_result( op, rs );
1448                         }
1449                         goto done;
1450                 }
1451
1452                 rs->sr_err = ldap_sasl_interactive_bind_s( msc->msc_ld, binddn->bv_val,
1453                                 mt->mt_idassert_sasl_mech.bv_val, NULL, NULL,
1454                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1455                                 defaults );
1456
1457                 rs->sr_err = slap_map_api2result( rs );
1458                 if ( rs->sr_err != LDAP_SUCCESS ) {
1459                         LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1460                         if ( sendok & LDAP_BACK_SENDERR ) {
1461                                 send_ldap_result( op, rs );
1462                         }
1463
1464                 } else {
1465                         LDAP_BACK_CONN_ISBOUND_SET( msc );
1466                 }
1467
1468                 lutil_sasl_freedefs( defaults );
1469                 if ( freeauthz ) {
1470                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
1471                 }
1472
1473                 goto done;
1474 #endif /* HAVE_CYRUS_SASL */
1475         }
1476
1477         *method = mt->mt_idassert_authmethod;
1478         switch ( mt->mt_idassert_authmethod ) {
1479         case LDAP_AUTH_NONE:
1480                 BER_BVSTR( binddn, "" );
1481                 BER_BVSTR( bindcred, "" );
1482                 /* fallthru */
1483
1484         case LDAP_AUTH_SIMPLE:
1485                 break;
1486
1487         default:
1488                 /* unsupported! */
1489                 LDAP_BACK_CONN_ISBOUND_CLEAR( msc );
1490                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
1491                 if ( sendok & LDAP_BACK_SENDERR ) {
1492                         send_ldap_result( op, rs );
1493                 }
1494                 break;
1495         }
1496
1497 done:;
1498         return rs->sr_err;
1499 }
1500
1501 static int
1502 meta_back_proxy_authz_bind( metaconn_t *mc, int candidate, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1503 {
1504         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1505         metatarget_t            *mt = mi->mi_targets[ candidate ];
1506         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1507         struct berval           binddn = BER_BVC( "" ),
1508                                 cred = BER_BVC( "" );
1509         int                     method = LDAP_AUTH_NONE,
1510                                 rc;
1511
1512         rc = meta_back_proxy_authz_cred( mc, candidate, op, rs, sendok, &binddn, &cred, &method );
1513         if ( rc == LDAP_SUCCESS && !LDAP_BACK_CONN_ISBOUND( msc ) ) {
1514                 int     msgid;
1515
1516                 switch ( method ) {
1517                 case LDAP_AUTH_NONE:
1518                 case LDAP_AUTH_SIMPLE:
1519                         for (;;) {
1520                                 rs->sr_err = ldap_sasl_bind( msc->msc_ld,
1521                                         binddn.bv_val, LDAP_SASL_SIMPLE,
1522                                         &cred, NULL, NULL, &msgid );
1523                                 if ( rs->sr_err != LDAP_X_CONNECTING ) {
1524                                         break;
1525                                 }
1526                                 ldap_pvt_thread_yield();
1527                         }
1528                         rc = meta_back_bind_op_result( op, rs, mc, candidate, msgid, sendok );
1529                         if ( rc == LDAP_SUCCESS ) {
1530                                 /* set rebind stuff in case of successful proxyAuthz bind,
1531                                  * so that referral chasing is attempted using the right
1532                                  * identity */
1533                                 LDAP_BACK_CONN_ISBOUND_SET( msc );
1534                                 ber_bvreplace( &msc->msc_bound_ndn, &binddn );
1535
1536                                 if ( LDAP_BACK_SAVECRED( mi ) ) {
1537                                         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
1538                                                 memset( msc->msc_cred.bv_val, 0,
1539                                                         msc->msc_cred.bv_len );
1540                                         }
1541                                         ber_bvreplace( &msc->msc_cred, &cred );
1542                                         ldap_set_rebind_proc( msc->msc_ld, mt->mt_rebind_f, msc );
1543                                 }
1544                         }
1545                         break;
1546
1547                 default:
1548                         assert( 0 );
1549                         break;
1550                 }
1551         }
1552
1553         return LDAP_BACK_CONN_ISBOUND( msc );
1554 }
1555
1556 /*
1557  * Add controls;
1558  *
1559  * if any needs to be added, it is prepended to existing ones,
1560  * in a newly allocated array.  The companion function
1561  * mi->mi_ldap_extra->controls_free() must be used to restore the original
1562  * status of op->o_ctrls.
1563  */
1564 int
1565 meta_back_controls_add(
1566                 Operation       *op,
1567                 SlapReply       *rs,
1568                 metaconn_t      *mc,
1569                 int             candidate,
1570                 LDAPControl     ***pctrls )
1571 {
1572         metainfo_t              *mi = (metainfo_t *)op->o_bd->be_private;
1573         metatarget_t            *mt = mi->mi_targets[ candidate ];
1574         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
1575
1576         LDAPControl             **ctrls = NULL;
1577         /* set to the maximum number of controls this backend can add */
1578         LDAPControl             c[ 2 ] = { 0 };
1579         int                     n = 0, i, j1 = 0, j2 = 0;
1580
1581         *pctrls = NULL;
1582
1583         rs->sr_err = LDAP_SUCCESS;
1584
1585         /* don't add controls if protocol is not LDAPv3 */
1586         switch ( mt->mt_version ) {
1587         case LDAP_VERSION3:
1588                 break;
1589
1590         case 0:
1591                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1592                         break;
1593                 }
1594                 /* fall thru */
1595
1596         default:
1597                 goto done;
1598         }
1599
1600         /* put controls that go __before__ existing ones here */
1601
1602         /* proxyAuthz for identity assertion */
1603         switch ( mi->mi_ldap_extra->proxy_authz_ctrl( op, rs, &msc->msc_bound_ndn,
1604                 mt->mt_version, &mt->mt_idassert, &c[ j1 ] ) )
1605         {
1606         case SLAP_CB_CONTINUE:
1607                 break;
1608
1609         case LDAP_SUCCESS:
1610                 j1++;
1611                 break;
1612
1613         default:
1614                 goto done;
1615         }
1616
1617         /* put controls that go __after__ existing ones here */
1618
1619 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
1620         /* session tracking */
1621         if ( META_BACK_TGT_ST_REQUEST( mt ) ) {
1622                 switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) {
1623                 case SLAP_CB_CONTINUE:
1624                         break;
1625
1626                 case LDAP_SUCCESS:
1627                         j2++;
1628                         break;
1629
1630                 default:
1631                         goto done;
1632                 }
1633         }
1634 #endif /* SLAP_CONTROL_X_SESSION_TRACKING */
1635
1636         if ( rs->sr_err == SLAP_CB_CONTINUE ) {
1637                 rs->sr_err = LDAP_SUCCESS;
1638         }
1639
1640         /* if nothing to do, just bail out */
1641         if ( j1 == 0 && j2 == 0 ) {
1642                 goto done;
1643         }
1644
1645         assert( j1 + j1 <= sizeof( c )/sizeof(LDAPControl) );
1646
1647         if ( op->o_ctrls ) {
1648                 for ( n = 0; op->o_ctrls[ n ]; n++ )
1649                         /* just count ctrls */ ;
1650         }
1651
1652         ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ),
1653                         op->o_tmpmemctx );
1654         if ( j1 ) {
1655                 ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ];
1656                 *ctrls[ 0 ] = c[ 0 ];
1657                 for ( i = 1; i < j1; i++ ) {
1658                         ctrls[ i ] = &ctrls[ 0 ][ i ];
1659                         *ctrls[ i ] = c[ i ];
1660                 }
1661         }
1662
1663         i = 0;
1664         if ( op->o_ctrls ) {
1665                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
1666                         ctrls[ i + j1 ] = op->o_ctrls[ i ];
1667                 }
1668         }
1669
1670         n += j1;
1671         if ( j2 ) {
1672                 ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1;
1673                 *ctrls[ n ] = c[ j1 ];
1674                 for ( i = 1; i < j2; i++ ) {
1675                         ctrls[ n + i ] = &ctrls[ n ][ i ];
1676                         *ctrls[ n + i ] = c[ i ];
1677                 }
1678         }
1679
1680         ctrls[ n + j2 ] = NULL;
1681
1682 done:;
1683         if ( ctrls == NULL ) {
1684                 ctrls = op->o_ctrls;
1685         }
1686
1687         *pctrls = ctrls;
1688
1689         return rs->sr_err;
1690 }
1691