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 1999-2005 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/socket.h>
  28 #include <ac/string.h>
  29
  30
  31 #define AVL_INTERNAL
  32 #include "slap.h"
  33 #include "../back-ldap/back-ldap.h"
  34 #include "back-meta.h"
  35
  36 static LDAP_REBIND_PROC meta_back_rebind;
  37
  38 static int
  39 meta_back_single_bind(
  40         Operation               *op,
  41         SlapReply               *rs,
  42         metaconn_t              *mc,
  43         int                     candidate );
  44
  45 int
  46 meta_back_bind( Operation *op, SlapReply *rs )
  47 {
  48         metainfo_t      *mi = ( metainfo_t * )op->o_bd->be_private;
  49         metaconn_t      *mc;
  50
  51         int             rc = LDAP_OTHER,
  52                         i, gotit = 0, isroot = 0;
  53
  54         SlapReply       *candidates = meta_back_candidates_get( op );
  55
  56         rs->sr_err = LDAP_SUCCESS;
  57
  58         Debug( LDAP_DEBUG_ARGS, "meta_back_bind: dn: %s.\n%s%s",
  59                         op->o_req_dn.bv_val, "", "" );
  60
  61         if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
  62                 isroot = 1;
  63                 ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
  64         }
  65
  66         /* we need meta_back_getconn() not send result even on error,
  67          * because we want to intercept the error and make it
  68          * invalidCredentials */
  69         mc = meta_back_getconn( op, rs, NULL, LDAP_BACK_DONTSEND );
  70         if ( !mc ) {
  71                 Debug( LDAP_DEBUG_ANY,
  72                                 "meta_back_bind: no target "
  73                                 "for dn \"%s\" (%d: %s).\n",
  74                                 op->o_req_dn.bv_val, rs->sr_err,
  75                                 rs->sr_text ? rs->sr_text : "" );
  76                 /* FIXME: there might be cases where we don't want
  77                  * to map the error onto invalidCredentials */
  78                 switch ( rs->sr_err ) {
  79                 case LDAP_NO_SUCH_OBJECT:
  80                 case LDAP_UNWILLING_TO_PERFORM:
  81                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
  82                         rs->sr_text = NULL;
  83                         break;
  84                 }
  85                 send_ldap_result( op, rs );
  86                 return rs->sr_err;
  87         }
  88
  89         /*
  90          * Each target is scanned ...
  91          */
  92         mc->mc_auth_target = META_BOUND_NONE;
  93         for ( i = 0; i < mi->mi_ntargets; i++ ) {
  94                 int             lerr;
  95                 Operation       op2 = *op;
  96
  97                 /*
  98                  * Skip non-candidates
  99                  */
 100                 if ( candidates[ i ].sr_tag != META_CANDIDATE ) {
 101                         continue;
 102                 }
 103
 104                 if ( gotit == 0 ) {
 105                         gotit = 1;
 106
 107                 } else if ( isroot == 0 ) {
 108                         /*
 109                          * A bind operation is expected to have
 110                          * ONE CANDIDATE ONLY!
 111                          */
 112                         Debug( LDAP_DEBUG_ANY,
 113                                         "==>meta_back_bind: more than one"
 114                                         " candidate is trying to bind...\n",
 115                                         0, 0, 0 );
 116                 }
 117
 118                 if ( isroot && !BER_BVISNULL( &mi->mi_targets[ i ]->mt_pseudorootdn ) )
 119                 {
 120                         op2.o_req_dn = mi->mi_targets[ i ]->mt_pseudorootdn;
 121                         op2.o_req_ndn = mi->mi_targets[ i ]->mt_pseudorootdn;
 122                         op2.orb_cred = mi->mi_targets[ i ]->mt_pseudorootpw;
 123                         op2.orb_method = LDAP_AUTH_SIMPLE;
 124                 }
 125
 126                 lerr = meta_back_single_bind( &op2, rs, mc, i );
 127                 if ( lerr != LDAP_SUCCESS ) {
 128                         rs->sr_err = lerr;
 129                         candidates[ i ].sr_tag = META_NOT_CANDIDATE;
 130
 131                 } else {
 132                         rc = LDAP_SUCCESS;
 133                 }
 134         }
 135
 136         if ( isroot ) {
 137                 mc->mc_auth_target = META_BOUND_ALL;
 138         }
 139
 140         /*
 141          * rc is LDAP_SUCCESS if at least one bind succeeded,
 142          * err is the last error that occurred during a bind;
 143          * if at least (and at most?) one bind succeedes, fine.
 144          */
 145         if ( rc != LDAP_SUCCESS ) {
 146
 147                 /*
 148                  * deal with bind failure ...
 149                  */
 150
 151                 /*
 152                  * no target was found within the naming context,
 153                  * so bind must fail with invalid credentials
 154                  */
 155                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 156                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 157                 }
 158
 159                 rs->sr_err = slap_map_api2result( rs );
 160                 send_ldap_result( op, rs );
 161                 return rs->sr_err;
 162         }
 163
 164         return LDAP_SUCCESS;
 165 }
 166
 167 /*
 168  * meta_back_single_bind
 169  *
 170  * attempts to perform a bind with creds
 171  */
 172 static int
 173 meta_back_single_bind(
 174         Operation               *op,
 175         SlapReply               *rs,
 176         metaconn_t              *mc,
 177         int                     candidate )
 178 {
 179         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 180         metatarget_t            *mt = mi->mi_targets[ candidate ];
 181         struct berval           mdn = BER_BVNULL;
 182         dncookie                dc;
 183         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 184         int                     msgid;
 185
 186         /*
 187          * Rewrite the bind dn if needed
 188          */
 189         dc.rwmap = &mi->mi_targets[ candidate ]->mt_rwmap;
 190         dc.conn = op->o_conn;
 191         dc.rs = rs;
 192         dc.ctx = "bindDN";
 193
 194         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 195                 send_ldap_result( op, rs );
 196                 return -1;
 197         }
 198
 199         /* FIXME: this fixes the bind problem right now; we need
 200          * to use the asynchronous version to get the "matched"
 201          * and more in case of failure ... */
 202         /* FIXME: should be check if at least some of the op->o_ctrls
 203          * can/should be passed? */
 204 rebind:;
 205         rs->sr_err = ldap_sasl_bind( msc->msc_ld, mdn.bv_val,
 206                         LDAP_SASL_SIMPLE, &op->orb_cred,
 207                         op->o_ctrls, NULL, &msgid );
 208         if ( rs->sr_err == LDAP_SUCCESS ) {
 209                 LDAPMessage     *res;
 210                 struct timeval  tv;
 211                 int             rc;
 212                 int             nretries = mt->mt_nretries;
 213
 214                 /*
 215                  * handle response!!!
 216                  */
 217 retry:;
 218                 tv.tv_sec = 0;
 219                 tv.tv_usec = META_BIND_TIMEOUT;
 220                 switch ( ldap_result( msc->msc_ld, msgid, 0, &tv, &res ) ) {
 221                 case 0:
 222                         Debug( LDAP_DEBUG_ANY, "%s meta_back_single_bind: ldap_result=%d nretries=%d\n",
 223                                 op->o_log_prefix, 0, nretries );
 224
 225                         if ( nretries != META_RETRY_NEVER ) {
 226                                 ldap_pvt_thread_yield();
 227                                 if ( nretries > 0 ) {
 228                                         nretries--;
 229                                 }
 230                                 goto retry;
 231                         }
 232                         rs->sr_err = LDAP_BUSY;
 233                         break;
 234
 235                 case -1:
 236                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 237                                         &rs->sr_err );
 238
 239                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_single_bind: err=%d nretries=%d\n",
 240                                 op->o_log_prefix, rs->sr_err, nretries );
 241
 242                         rc = slap_map_api2result( rs );
 243                         if ( rs->sr_err == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 244                                 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
 245                                 msc->msc_ld = NULL;
 246                                 msc->msc_bound = 0;
 247
 248                                 /* mc here must be the regular mc, reset and ready for init */
 249                                 rc = meta_back_init_one_conn( op, rs, mt, msc,
 250                                                 LDAP_BACK_DONTSEND );
 251                                 if ( rc ) {
 252                                         if ( nretries > 0 ) {
 253                                                 nretries--;
 254                                         }
 255                                         ldap_pvt_thread_yield();
 256                                         goto rebind;
 257                                 }
 258                         }
 259                         break;
 260
 261                 default:
 262                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 263                                         NULL, NULL, NULL, NULL, 1 );
 264                         if ( rc != LDAP_SUCCESS ) {
 265                                 rs->sr_err = rc;
 266                         }
 267                         break;
 268                 }
 269         }
 270
 271         if ( rs->sr_err != LDAP_SUCCESS ) {
 272                 rs->sr_err = slap_map_api2result( rs );
 273                 goto return_results;
 274         }
 275
 276         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_dn );
 277         msc->msc_bound = META_BOUND;
 278         mc->mc_auth_target = candidate;
 279
 280         if ( LDAP_BACK_SAVECRED( mi ) ) {
 281                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 282                 ldap_set_rebind_proc( msc->msc_ld, meta_back_rebind, msc );
 283         }
 284
 285         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 286                         && op->o_req_ndn.bv_len != 0 )
 287         {
 288                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 289                                 &op->o_req_ndn, candidate );
 290         }
 291
 292 return_results:;
 293         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 294                 free( mdn.bv_val );
 295         }
 296
 297         return rs->sr_err;
 298 }
 299
 300 /*
 301  * meta_back_single_dobind
 302  */
 303 int
 304 meta_back_single_dobind(
 305         Operation               *op,
 306         SlapReply               *rs,
 307         metaconn_t              *mc,
 308         int                     candidate,
 309         ldap_back_send_t        sendok,
 310         int                     nretries )
 311 {
 312         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 313         metatarget_t            *mt = mi->mi_targets[ candidate ];
 314         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 315         int                     rc;
 316         struct berval           cred = BER_BVC( "" );
 317         int                     msgid;
 318
 319         /*
 320          * Otherwise an anonymous bind is performed
 321          * (note: if the target was already bound, the anonymous
 322          * bind clears the previous bind).
 323          */
 324         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 325                 ber_memfree( msc->msc_bound_ndn.bv_val );
 326                 BER_BVZERO( &msc->msc_bound_ndn );
 327         }
 328
 329         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 330                 /* destroy sensitive data */
 331                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 332                 ber_memfree( msc->msc_cred.bv_val );
 333                 BER_BVZERO( &msc->msc_cred );
 334         }
 335
 336         /* FIXME: should we check if at least some of the op->o_ctrls
 337          * can/should be passed? */
 338 rebind:;
 339         rc = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 340                         NULL, NULL, &msgid );
 341         if ( rc == LDAP_SUCCESS ) {
 342                 LDAPMessage     *res;
 343                 struct timeval  tv;
 344
 345                 /*
 346                  * handle response!!!
 347                  */
 348 retry:;
 349                 tv.tv_sec = 0;
 350                 tv.tv_usec = META_BIND_TIMEOUT;
 351                 switch ( ldap_result( msc->msc_ld, msgid, 0, &tv, &res ) ) {
 352                 case 0:
 353                         Debug( LDAP_DEBUG_ANY, "%s meta_back_single_dobind: ldap_result=%d nretries=%d\n",
 354                                 op->o_log_prefix, 0, nretries );
 355
 356                         if ( nretries != META_RETRY_NEVER ) {
 357                                 ldap_pvt_thread_yield();
 358                                 if ( nretries > 0 ) {
 359                                         nretries--;
 360                                 }
 361                                 goto retry;
 362                         }
 363
 364                         rc = LDAP_BUSY;
 365                         break;
 366
 367                 case -1:
 368                         ldap_get_option( msc->msc_ld,
 369                                         LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 370
 371                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_single_dobind: err=%d nretries=%d\n",
 372                                         op->o_log_prefix, rs->sr_err, nretries );
 373
 374                         rc = slap_map_api2result( rs );
 375                         if ( rc == LDAP_UNAVAILABLE && nretries != META_RETRY_NEVER ) {
 376                                 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
 377                                 msc->msc_ld = NULL;
 378                                 msc->msc_bound = 0;
 379
 380                                 /* mc here must be the regular mc, reset and ready for init */
 381                                 rc = meta_back_init_one_conn( op, rs, mt, msc, LDAP_BACK_DONTSEND );
 382
 383                                 if ( rc == LDAP_SUCCESS ) {
 384                                         ldap_pvt_thread_yield();
 385                                         if ( nretries > 0 ) {
 386                                                 nretries--;
 387                                         }
 388                                         goto rebind;
 389                                 }
 390                         }
 391                         break;
 392
 393                 default:
 394                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 395                                         NULL, NULL, NULL, NULL, 1 );
 396                         if ( rc == LDAP_SUCCESS ) {
 397                                 rc = slap_map_api2result( rs );
 398                         }
 399                         break;
 400                 }
 401         }
 402
 403         rs->sr_err = rc;
 404         if ( rc != LDAP_SUCCESS && ( sendok & LDAP_BACK_SENDERR ) ) {
 405                 send_ldap_result( op, rs );
 406         }
 407
 408         return rc;
 409 }
 410
 411 /*
 412  * meta_back_dobind
 413  */
 414 int
 415 meta_back_dobind(
 416         Operation               *op,
 417         SlapReply               *rs,
 418         metaconn_t              *mc,
 419         ldap_back_send_t        sendok )
 420 {
 421         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 422
 423         metasingleconn_t        *msc;
 424         int                     bound = 0, i;
 425
 426         SlapReply               *candidates = meta_back_candidates_get( op );
 427
 428         ldap_pvt_thread_mutex_lock( &mc->mc_mutex );
 429
 430         /*
 431          * all the targets are bound as pseudoroot
 432          */
 433         if ( mc->mc_auth_target == META_BOUND_ALL ) {
 434                 bound = 1;
 435                 goto done;
 436         }
 437
 438         for ( i = 0, msc = &mc->mc_conns[ 0 ]; !META_LAST( msc ); ++i, ++msc ) {
 439                 metatarget_t    *mt = mi->mi_targets[ i ];
 440                 int             rc;
 441
 442                 /*
 443                  * Not a candidate or something wrong with this target ...
 444                  */
 445                 if ( msc->msc_ld == NULL ) {
 446                         continue;
 447                 }
 448
 449                 /*
 450                  * If the target is already bound it is skipped
 451                  */
 452                 if ( msc->msc_bound == META_BOUND && mc->mc_auth_target == i ) {
 453                         ++bound;
 454                         continue;
 455                 }
 456
 457                 rc = meta_back_single_dobind( op, rs, mc, i,
 458                                 LDAP_BACK_DONTSEND, mt->mt_nretries );
 459                 if ( rc != LDAP_SUCCESS ) {
 460                         Debug( LDAP_DEBUG_ANY, "%s meta_back_dobind[%d]: "
 461                                         "(anonymous) err=%d\n",
 462                                         op->o_log_prefix, i, rc );
 463
 464                         /*
 465                          * null cred bind should always succeed
 466                          * as anonymous, so a failure means
 467                          * the target is no longer candidate possibly
 468                          * due to technical reasons (remote host down?)
 469                          * so better clear the handle
 470                          */
 471                         candidates[ i ].sr_tag = META_NOT_CANDIDATE;
 472 #if 0
 473                         ( void )meta_clear_one_candidate( msc );
 474 #endif
 475                         continue;
 476                 } /* else */
 477
 478                 candidates[ i ].sr_tag = META_CANDIDATE;
 479                 msc->msc_bound = META_ANONYMOUS;
 480                 ++bound;
 481         }
 482
 483 done:;
 484         ldap_pvt_thread_mutex_unlock( &mc->mc_mutex );
 485
 486         if ( bound == 0 && sendok & LDAP_BACK_SENDERR ) {
 487                 if ( rs->sr_err == LDAP_SUCCESS ) {
 488                         rs->sr_err = LDAP_BUSY;
 489                 }
 490                 send_ldap_result( op, rs );
 491         }
 492
 493         return( bound > 0 );
 494 }
 495
 496 /*
 497  * meta_back_rebind
 498  *
 499  * This is a callback used for chasing referrals using the same
 500  * credentials as the original user on this session.
 501  */
 502 static int
 503 meta_back_rebind(
 504         LDAP                    *ld,
 505         LDAP_CONST char         *url,
 506         ber_tag_t               request,
 507         ber_int_t               msgid,
 508         void                    *params )
 509 {
 510         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 511
 512         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 513                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 514                         NULL, NULL, NULL );
 515 }
 516
 517 /*
 518  * FIXME: error return must be handled in a cleaner way ...
 519  */
 520 int
 521 meta_back_op_result(
 522         metaconn_t      *mc,
 523         Operation       *op,
 524         SlapReply       *rs,
 525         int             candidate )
 526 {
 527         int                     i,
 528                                 rerr = LDAP_SUCCESS;
 529         metasingleconn_t        *msc;
 530         char                    *rmsg = NULL;
 531         char                    *rmatch = NULL;
 532         int                     free_rmsg = 0,
 533                                 free_rmatch = 0;
 534
 535         if ( candidate != META_TARGET_NONE ) {
 536                 msc = &mc->mc_conns[ candidate ];
 537
 538                 rs->sr_err = LDAP_SUCCESS;
 539
 540                 ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 541                 if ( rs->sr_err != LDAP_SUCCESS ) {
 542                         /*
 543                          * better check the type of error. In some cases
 544                          * (search ?) it might be better to return a
 545                          * success if at least one of the targets gave
 546                          * positive result ...
 547                          */
 548                         ldap_get_option( msc->msc_ld,
 549                                         LDAP_OPT_ERROR_STRING, &rmsg );
 550                         ldap_get_option( msc->msc_ld,
 551                                         LDAP_OPT_MATCHED_DN, &rmatch );
 552                         rerr = rs->sr_err = slap_map_api2result( rs );
 553
 554                         if ( rmsg ) {
 555                                 free_rmsg = 1;
 556                         }
 557                         if ( rmatch ) {
 558                                 free_rmatch = 1;
 559                         }
 560
 561                         Debug(LDAP_DEBUG_ANY,
 562                                         "==> meta_back_op_result: target"
 563                                         " <%d> sending msg \"%s\""
 564                                         " (matched \"%s\")\n",
 565                                         candidate, ( rmsg ? rmsg : "" ),
 566                                         ( rmatch ? rmatch : "" ) );
 567                 }
 568
 569         } else {
 570                 for ( i = 0, msc = &mc->mc_conns[ 0 ]; !META_LAST( msc ); ++i, ++msc ) {
 571                         char    *msg = NULL;
 572                         char    *match = NULL;
 573
 574                         rs->sr_err = LDAP_SUCCESS;
 575
 576                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 577                         if ( rs->sr_err != LDAP_SUCCESS ) {
 578                                 /*
 579                                  * better check the type of error. In some cases
 580                                  * (search ?) it might be better to return a
 581                                  * success if at least one of the targets gave
 582                                  * positive result ...
 583                                  */
 584                                 ldap_get_option( msc->msc_ld,
 585                                                 LDAP_OPT_ERROR_STRING, &msg );
 586                                 ldap_get_option( msc->msc_ld,
 587                                                 LDAP_OPT_MATCHED_DN, &match );
 588                                 rs->sr_err = slap_map_api2result( rs );
 589
 590                                 Debug(LDAP_DEBUG_ANY,
 591                                                 "==> meta_back_op_result: target"
 592                                                 " <%d> sending msg \"%s\""
 593                                                 " (matched \"%s\")\n",
 594                                                 i, ( msg ? msg : "" ),
 595                                                 ( match ? match : "" ) );
 596
 597                                 /*
 598                                  * FIXME: need to rewrite "match" (need rwinfo)
 599                                  */
 600                                 switch ( rs->sr_err ) {
 601                                 default:
 602                                         rerr = rs->sr_err;
 603                                         if ( rmsg ) {
 604                                                 ber_memfree( rmsg );
 605                                         }
 606                                         rmsg = msg;
 607                                         free_rmsg = 1;
 608                                         msg = NULL;
 609                                         if ( rmatch ) {
 610                                                 ber_memfree( rmatch );
 611                                         }
 612                                         rmatch = match;
 613                                         free_rmatch = 1;
 614                                         match = NULL;
 615                                         break;
 616                                 }
 617
 618                                 /* better test the pointers before freeing? */
 619                                 if ( match ) {
 620                                         free( match );
 621                                 }
 622                                 if ( msg ) {
 623                                         free( msg );
 624                                 }
 625                         }
 626                 }
 627         }
 628
 629         rs->sr_err = rerr;
 630         rs->sr_text = rmsg;
 631         rs->sr_matched = rmatch;
 632         send_ldap_result( op, rs );
 633         if ( free_rmsg ) {
 634                 ber_memfree( rmsg );
 635         }
 636         if ( free_rmatch ) {
 637                 ber_memfree( rmatch );
 638         }
 639         rs->sr_text = NULL;
 640         rs->sr_matched = NULL;
 641
 642         return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
 643 }
 644