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 = { 0, 0 };
 211                 int             rc;
 212                 int             nretries = META_BIND_NRETRIES;
 213
 214                 /*
 215                  * handle response!!!
 216                  */
 217 retry:;
 218                 switch ( ldap_result( msc->msc_ld, msgid, 0, &tv, &res ) ) {
 219                 case 0:
 220                         if ( nretries > 0 ) {
 221                                 ldap_pvt_thread_yield();
 222                                 tv.tv_sec = 0;
 223                                 tv.tv_usec = META_BIND_TIMEOUT;
 224                                 nretries--;
 225                                 goto retry;
 226                         }
 227                         rs->sr_err = LDAP_BUSY;
 228                         break;
 229
 230                 case -1:
 231                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 232                                         &rs->sr_err );
 233
 234                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_single_bind(%s) err=%d\n",
 235                                 op->o_log_prefix, mdn.bv_val, rs->sr_err );
 236
 237                         if ( rs->sr_err == LDAP_UNAVAILABLE && nretries > 0 ) {
 238                                 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
 239                                 msc->msc_ld = NULL;
 240                                 msc->msc_bound = 0;
 241
 242                                 /* mc here must be the regular mc, reset and ready for init */
 243                                 rc = meta_back_init_one_conn( op, rs, mt, msc,
 244                                                 LDAP_BACK_DONTSEND );
 245                                 if ( rc ) {
 246                                         nretries--;
 247                                         ldap_pvt_thread_yield();
 248                                         goto rebind;
 249                                 }
 250                         }
 251                         break;
 252
 253                 default:
 254                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 255                                         NULL, NULL, NULL, NULL, 1 );
 256                         if ( rc != LDAP_SUCCESS ) {
 257                                 rs->sr_err = rc;
 258                         }
 259                         break;
 260                 }
 261         }
 262
 263         if ( rs->sr_err != LDAP_SUCCESS ) {
 264                 rs->sr_err = slap_map_api2result( rs );
 265                 goto return_results;
 266         }
 267
 268         ber_bvreplace( &msc->msc_bound_ndn, &op->o_req_dn );
 269         msc->msc_bound = META_BOUND;
 270         mc->mc_auth_target = candidate;
 271
 272         if ( LDAP_BACK_SAVECRED( mi ) ) {
 273                 ber_bvreplace( &msc->msc_cred, &op->orb_cred );
 274                 ldap_set_rebind_proc( msc->msc_ld, meta_back_rebind, msc );
 275         }
 276
 277         if ( mi->mi_cache.ttl != META_DNCACHE_DISABLED
 278                         && op->o_req_ndn.bv_len != 0 )
 279         {
 280                 ( void )meta_dncache_update_entry( &mi->mi_cache,
 281                                 &op->o_req_ndn, candidate );
 282         }
 283
 284 return_results:;
 285         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 286                 free( mdn.bv_val );
 287         }
 288
 289         return rs->sr_err;
 290 }
 291
 292 /*
 293  * meta_back_single_dobind
 294  */
 295 int
 296 meta_back_single_dobind(
 297         Operation               *op,
 298         SlapReply               *rs,
 299         metaconn_t              *mc,
 300         int                     candidate,
 301         ldap_back_send_t        sendok,
 302         int                     retries )
 303 {
 304         metainfo_t              *mi = ( metainfo_t * )op->o_bd->be_private;
 305         metatarget_t            *mt = mi->mi_targets[ candidate ];
 306         metasingleconn_t        *msc = &mc->mc_conns[ candidate ];
 307         int                     rc;
 308         struct berval           cred = BER_BVC( "" );
 309         int                     msgid;
 310
 311         /*
 312          * Otherwise an anonymous bind is performed
 313          * (note: if the target was already bound, the anonymous
 314          * bind clears the previous bind).
 315          */
 316         if ( !BER_BVISNULL( &msc->msc_bound_ndn ) ) {
 317                 ber_memfree( msc->msc_bound_ndn.bv_val );
 318                 BER_BVZERO( &msc->msc_bound_ndn );
 319         }
 320
 321         if ( !BER_BVISNULL( &msc->msc_cred ) ) {
 322                 /* destroy sensitive data */
 323                 memset( msc->msc_cred.bv_val, 0, msc->msc_cred.bv_len );
 324                 ber_memfree( msc->msc_cred.bv_val );
 325                 BER_BVZERO( &msc->msc_cred );
 326         }
 327
 328         /* FIXME: should we check if at least some of the op->o_ctrls
 329          * can/should be passed? */
 330 rebind:;
 331         rc = ldap_sasl_bind( msc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 332                         NULL, NULL, &msgid );
 333         if ( rc == LDAP_SUCCESS ) {
 334                 LDAPMessage     *res;
 335                 struct timeval  tv = { 0, 0 };
 336
 337                 /*
 338                  * handle response!!!
 339                  */
 340 retry:;
 341                 tv.tv_sec = 0;
 342                 tv.tv_usec = META_BIND_TIMEOUT;
 343                 switch ( ldap_result( msc->msc_ld, msgid, 0, &tv, &res ) ) {
 344                 case 0:
 345                         if ( retries > 0 ) {
 346                                 ldap_pvt_thread_yield();
 347                                 retries--;
 348                                 goto retry;
 349                         }
 350
 351                         rc = LDAP_BUSY;
 352                         break;
 353
 354                 case -1:
 355                         ldap_get_option( msc->msc_ld,
 356                                         LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 357
 358                         Debug( LDAP_DEBUG_ANY, "### %s meta_back_single_dobind(\"\") err=%d\n",
 359                                 op->o_log_prefix, rs->sr_err, 0 );
 360
 361                         rc = slap_map_api2result( rs );
 362                         if ( rc == LDAP_UNAVAILABLE && retries > 0 ) {
 363                                 ldap_unbind_ext_s( msc->msc_ld, NULL, NULL );
 364                                 msc->msc_ld = NULL;
 365                                 msc->msc_bound = 0;
 366
 367                                 /* mc here must be the regular mc, reset and ready for init */
 368                                 rc = meta_back_init_one_conn( op, rs, mt, msc, LDAP_BACK_DONTSEND );
 369
 370                                 if ( rc ) {
 371                                         ldap_pvt_thread_yield();
 372                                         retries--;
 373                                         goto rebind;
 374                                 }
 375                         }
 376                         break;
 377
 378                 default:
 379                         rc = ldap_parse_result( msc->msc_ld, res, &rs->sr_err,
 380                                         NULL, NULL, NULL, NULL, 1 );
 381                         if ( rc == LDAP_SUCCESS ) {
 382                                 rc = slap_map_api2result( rs );
 383                         }
 384                         break;
 385                 }
 386         }
 387
 388         if ( rc != LDAP_SUCCESS && ( sendok & LDAP_BACK_SENDERR ) ) {
 389                 rs->sr_err = rc;
 390                 send_ldap_result( op, rs );
 391         }
 392
 393         return rc;
 394 }
 395
 396 /*
 397  * meta_back_dobind
 398  */
 399 int
 400 meta_back_dobind(
 401         Operation               *op,
 402         SlapReply               *rs,
 403         metaconn_t              *mc,
 404         ldap_back_send_t        sendok )
 405 {
 406         metasingleconn_t        *msc;
 407         int                     bound = 0, i;
 408
 409         SlapReply               *candidates = meta_back_candidates_get( op );
 410
 411         ldap_pvt_thread_mutex_lock( &mc->mc_mutex );
 412
 413         /*
 414          * all the targets are bound as pseudoroot
 415          */
 416         if ( mc->mc_auth_target == META_BOUND_ALL ) {
 417                 bound = 1;
 418                 goto done;
 419         }
 420
 421         for ( i = 0, msc = &mc->mc_conns[ 0 ]; !META_LAST( msc ); ++i, ++msc ) {
 422                 int             rc;
 423
 424                 /*
 425                  * Not a candidate or something wrong with this target ...
 426                  */
 427                 if ( msc->msc_ld == NULL ) {
 428                         continue;
 429                 }
 430
 431                 /*
 432                  * If the target is already bound it is skipped
 433                  */
 434                 if ( msc->msc_bound == META_BOUND && mc->mc_auth_target == i ) {
 435                         ++bound;
 436                         continue;
 437                 }
 438
 439                 rc = meta_back_single_dobind( op, rs, mc, i,
 440                         LDAP_BACK_DONTSEND, META_BIND_NRETRIES );
 441                 if ( rc != LDAP_SUCCESS ) {
 442                         Debug( LDAP_DEBUG_ANY, "%s meta_back_dobind[%d]: "
 443                                         "(anonymous) err=%d\n",
 444                                         op->o_log_prefix, i, rc );
 445
 446                         /*
 447                          * null cred bind should always succeed
 448                          * as anonymous, so a failure means
 449                          * the target is no longer candidate possibly
 450                          * due to technical reasons (remote host down?)
 451                          * so better clear the handle
 452                          */
 453                         candidates[ i ].sr_tag = META_NOT_CANDIDATE;
 454 #if 0
 455                         ( void )meta_clear_one_candidate( msc );
 456 #endif
 457                         continue;
 458                 } /* else */
 459
 460                 candidates[ i ].sr_tag = META_CANDIDATE;
 461                 msc->msc_bound = META_ANONYMOUS;
 462                 ++bound;
 463         }
 464
 465 done:;
 466         ldap_pvt_thread_mutex_unlock( &mc->mc_mutex );
 467
 468         if ( bound == 0 && sendok & LDAP_BACK_SENDERR ) {
 469                 if ( rs->sr_err == LDAP_SUCCESS ) {
 470                         rs->sr_err = LDAP_BUSY;
 471                 }
 472                 send_ldap_result( op, rs );
 473         }
 474
 475         return( bound > 0 );
 476 }
 477
 478 /*
 479  * meta_back_rebind
 480  *
 481  * This is a callback used for chasing referrals using the same
 482  * credentials as the original user on this session.
 483  */
 484 static int
 485 meta_back_rebind(
 486         LDAP                    *ld,
 487         LDAP_CONST char         *url,
 488         ber_tag_t               request,
 489         ber_int_t               msgid,
 490         void                    *params )
 491 {
 492         metasingleconn_t        *msc = ( metasingleconn_t * )params;
 493
 494         return ldap_sasl_bind_s( ld, msc->msc_bound_ndn.bv_val,
 495                         LDAP_SASL_SIMPLE, &msc->msc_cred,
 496                         NULL, NULL, NULL );
 497 }
 498
 499 /*
 500  * FIXME: error return must be handled in a cleaner way ...
 501  */
 502 int
 503 meta_back_op_result(
 504         metaconn_t      *mc,
 505         Operation       *op,
 506         SlapReply       *rs,
 507         int             candidate )
 508 {
 509         int                     i,
 510                                 rerr = LDAP_SUCCESS;
 511         metasingleconn_t        *msc;
 512         char                    *rmsg = NULL;
 513         char                    *rmatch = NULL;
 514         int                     free_rmsg = 0,
 515                                 free_rmatch = 0;
 516
 517         if ( candidate != META_TARGET_NONE ) {
 518                 msc = &mc->mc_conns[ candidate ];
 519
 520                 rs->sr_err = LDAP_SUCCESS;
 521
 522                 ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 523                 if ( rs->sr_err != LDAP_SUCCESS ) {
 524                         /*
 525                          * better check the type of error. In some cases
 526                          * (search ?) it might be better to return a
 527                          * success if at least one of the targets gave
 528                          * positive result ...
 529                          */
 530                         ldap_get_option( msc->msc_ld,
 531                                         LDAP_OPT_ERROR_STRING, &rmsg );
 532                         ldap_get_option( msc->msc_ld,
 533                                         LDAP_OPT_MATCHED_DN, &rmatch );
 534                         rerr = rs->sr_err = slap_map_api2result( rs );
 535
 536                         if ( rmsg ) {
 537                                 free_rmsg = 1;
 538                         }
 539                         if ( rmatch ) {
 540                                 free_rmatch = 1;
 541                         }
 542
 543                         Debug(LDAP_DEBUG_ANY,
 544                                         "==> meta_back_op_result: target"
 545                                         " <%d> sending msg \"%s\""
 546                                         " (matched \"%s\")\n",
 547                                         candidate, ( rmsg ? rmsg : "" ),
 548                                         ( rmatch ? rmatch : "" ) );
 549                 }
 550
 551         } else {
 552                 for ( i = 0, msc = &mc->mc_conns[ 0 ]; !META_LAST( msc ); ++i, ++msc ) {
 553                         char    *msg = NULL;
 554                         char    *match = NULL;
 555
 556                         rs->sr_err = LDAP_SUCCESS;
 557
 558                         ldap_get_option( msc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 559                         if ( rs->sr_err != LDAP_SUCCESS ) {
 560                                 /*
 561                                  * better check the type of error. In some cases
 562                                  * (search ?) it might be better to return a
 563                                  * success if at least one of the targets gave
 564                                  * positive result ...
 565                                  */
 566                                 ldap_get_option( msc->msc_ld,
 567                                                 LDAP_OPT_ERROR_STRING, &msg );
 568                                 ldap_get_option( msc->msc_ld,
 569                                                 LDAP_OPT_MATCHED_DN, &match );
 570                                 rs->sr_err = slap_map_api2result( rs );
 571
 572                                 Debug(LDAP_DEBUG_ANY,
 573                                                 "==> meta_back_op_result: target"
 574                                                 " <%d> sending msg \"%s\""
 575                                                 " (matched \"%s\")\n",
 576                                                 i, ( msg ? msg : "" ),
 577                                                 ( match ? match : "" ) );
 578
 579                                 /*
 580                                  * FIXME: need to rewrite "match" (need rwinfo)
 581                                  */
 582                                 switch ( rs->sr_err ) {
 583                                 default:
 584                                         rerr = rs->sr_err;
 585                                         if ( rmsg ) {
 586                                                 ber_memfree( rmsg );
 587                                         }
 588                                         rmsg = msg;
 589                                         free_rmsg = 1;
 590                                         msg = NULL;
 591                                         if ( rmatch ) {
 592                                                 ber_memfree( rmatch );
 593                                         }
 594                                         rmatch = match;
 595                                         free_rmatch = 1;
 596                                         match = NULL;
 597                                         break;
 598                                 }
 599
 600                                 /* better test the pointers before freeing? */
 601                                 if ( match ) {
 602                                         free( match );
 603                                 }
 604                                 if ( msg ) {
 605                                         free( msg );
 606                                 }
 607                         }
 608                 }
 609         }
 610
 611         rs->sr_err = rerr;
 612         rs->sr_text = rmsg;
 613         rs->sr_matched = rmatch;
 614         send_ldap_result( op, rs );
 615         if ( free_rmsg ) {
 616                 ber_memfree( rmsg );
 617         }
 618         if ( free_rmatch ) {
 619                 ber_memfree( rmatch );
 620         }
 621         rs->sr_text = NULL;
 622         rs->sr_matched = NULL;
 623
 624         return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
 625 }
 626