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_do_single_bind(
  40                 struct metaconn         *lc,
  41                 Operation               *op,
  42                 SlapReply               *rs,
  43                 int                     candidate
  44 );
  45
  46 int
  47 meta_back_bind( Operation *op, SlapReply *rs )
  48 {
  49         struct metainfo *li = ( struct metainfo * )op->o_bd->be_private;
  50         struct metaconn *lc;
  51
  52         int rc = -1, i, gotit = 0, ndnlen, isroot = 0;
  53         int op_type = META_OP_ALLOW_MULTIPLE;
  54
  55         rs->sr_err = LDAP_SUCCESS;
  56
  57         Debug( LDAP_DEBUG_ARGS, "meta_back_bind: dn: %s.\n%s%s",
  58                         op->o_req_dn.bv_val, "", "" );
  59
  60         if ( op->orb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
  61                 isroot = 1;
  62                 ber_dupbv( &op->orb_edn, be_root_dn( op->o_bd ) );
  63                 op_type = META_OP_REQUIRE_ALL;
  64         }
  65         lc = meta_back_getconn( op, rs, op_type,
  66                         &op->o_req_ndn, NULL );
  67         if ( !lc ) {
  68                 Debug( LDAP_DEBUG_ANY,
  69                                 "meta_back_bind: no target for dn %s.\n%s%s",
  70                                 op->o_req_dn.bv_val, "", "");
  71
  72                 send_ldap_result( op, rs );
  73                 return -1;
  74         }
  75
  76         /*
  77          * Each target is scanned ...
  78          */
  79         lc->mc_bound_target = META_BOUND_NONE;
  80         ndnlen = op->o_req_ndn.bv_len;
  81         for ( i = 0; i < li->ntargets; i++ ) {
  82                 int             lerr;
  83                 struct berval   orig_dn = op->o_req_dn;
  84                 struct berval   orig_ndn = op->o_req_ndn;
  85                 struct berval   orig_cred = op->orb_cred;
  86                 int             orig_method = op->orb_method;
  87
  88
  89                 /*
  90                  * Skip non-candidates
  91                  */
  92                 if ( lc->mc_conns[ i ].msc_candidate != META_CANDIDATE ) {
  93                         continue;
  94                 }
  95
  96                 if ( gotit == 0 ) {
  97                         gotit = 1;
  98                 } else {
  99                         /*
 100                          * A bind operation is expected to have
 101                          * ONE CANDIDATE ONLY!
 102                          */
 103                         Debug( LDAP_DEBUG_ANY,
 104                                         "==>meta_back_bind: more than one"
 105                                         " candidate is attempting to bind"
 106                                         " ...\n%s%s%s",
 107                                         "", "", "" );
 108                 }
 109
 110                 if ( isroot && li->targets[ i ]->mt_pseudorootdn.bv_val != NULL ) {
 111                         op->o_req_dn = li->targets[ i ]->mt_pseudorootdn;
 112                         op->o_req_ndn = li->targets[ i ]->mt_pseudorootdn;
 113                         op->orb_cred = li->targets[ i ]->mt_pseudorootpw;
 114                         op->orb_method = LDAP_AUTH_SIMPLE;
 115                 }
 116
 117                 lerr = meta_back_do_single_bind( lc, op, rs, i );
 118                 if ( lerr != LDAP_SUCCESS ) {
 119                         rs->sr_err = lerr;
 120                         ( void )meta_clear_one_candidate( &lc->mc_conns[ i ], 1 );
 121                 } else {
 122                         rc = LDAP_SUCCESS;
 123                 }
 124
 125                 op->o_req_dn = orig_dn;
 126                 op->o_req_ndn = orig_ndn;
 127                 op->orb_cred = orig_cred;
 128                 op->orb_method = orig_method;
 129         }
 130
 131         if ( isroot ) {
 132                 lc->mc_bound_target = META_BOUND_ALL;
 133         }
 134
 135         /*
 136          * rc is LDAP_SUCCESS if at least one bind succeeded,
 137          * err is the last error that occurred during a bind;
 138          * if at least (and at most?) one bind succeedes, fine.
 139          */
 140         if ( rc != LDAP_SUCCESS /* && rs->sr_err != LDAP_SUCCESS */ ) {
 141
 142                 /*
 143                  * deal with bind failure ...
 144                  */
 145
 146                 /*
 147                  * no target was found within the naming context,
 148                  * so bind must fail with invalid credentials
 149                  */
 150                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 151                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 152                 }
 153
 154                 rs->sr_err = slap_map_api2result( rs );
 155                 send_ldap_result( op, rs );
 156                 return -1;
 157         }
 158
 159         return 0;
 160 }
 161
 162 /*
 163  * meta_back_do_single_bind
 164  *
 165  * attempts to perform a bind with creds
 166  */
 167 static int
 168 meta_back_do_single_bind(
 169                 struct metaconn         *lc,
 170                 Operation               *op,
 171                 SlapReply               *rs,
 172                 int                     candidate
 173 )
 174 {
 175         struct metainfo         *li = ( struct metainfo * )op->o_bd->be_private;
 176         struct berval           mdn = BER_BVNULL;
 177         dncookie                dc;
 178         struct metasingleconn   *lsc = &lc->mc_conns[ candidate ];
 179         int                     msgid;
 180
 181         /*
 182          * Rewrite the bind dn if needed
 183          */
 184         dc.rwmap = &li->targets[ candidate ]->mt_rwmap;
 185         dc.conn = op->o_conn;
 186         dc.rs = rs;
 187         dc.ctx = "bindDN";
 188
 189         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 190                 send_ldap_result( op, rs );
 191                 return -1;
 192         }
 193
 194         if ( op->o_ctrls ) {
 195                 rs->sr_err = ldap_set_option( lsc->msc_ld,
 196                                 LDAP_OPT_SERVER_CONTROLS, op->o_ctrls );
 197                 if ( rs->sr_err != LDAP_SUCCESS ) {
 198                         rs->sr_err = slap_map_api2result( rs );
 199                         goto return_results;
 200                 }
 201         }
 202
 203         /* FIXME: this fixes the bind problem right now; we need
 204          * to use the asynchronous version to get the "matched"
 205          * and more in case of failure ... */
 206         rs->sr_err = ldap_sasl_bind( lsc->msc_ld, mdn.bv_val,
 207                         LDAP_SASL_SIMPLE, &op->orb_cred,
 208                         op->o_ctrls, NULL, &msgid );
 209         if ( rs->sr_err == LDAP_SUCCESS ) {
 210                 LDAPMessage     *res;
 211                 struct timeval  tv = { 0, 0 };
 212                 int             rc;
 213
 214                 /*
 215                  * handle response!!!
 216                  */
 217 retry:;
 218                 switch ( ldap_result( lsc->msc_ld, msgid, 0, &tv, &res ) ) {
 219                 case 0:
 220                         ldap_pvt_thread_yield();
 221                         tv.tv_sec = 0;
 222                         tv.tv_usec = 100000;    /* 0.1 s */
 223                         goto retry;
 224
 225                 case -1:
 226                         ldap_get_option( lsc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 227                                         &rs->sr_err );
 228                         break;
 229
 230                 default:
 231                         rc = ldap_parse_result( lsc->msc_ld, res, &rs->sr_err,
 232                                         NULL, NULL, NULL, NULL, 1 );
 233                         if ( rc != LDAP_SUCCESS ) {
 234                                 rs->sr_err = rc;
 235                         }
 236                         break;
 237                 }
 238         }
 239
 240         if ( rs->sr_err != LDAP_SUCCESS ) {
 241                 rs->sr_err = slap_map_api2result( rs );
 242                 goto return_results;
 243         }
 244
 245         if ( !BER_BVISNULL( &lsc->msc_bound_ndn ) ) {
 246                 ber_memfree( lsc->msc_bound_ndn.bv_val );
 247         }
 248         ber_dupbv( &lsc->msc_bound_ndn, &op->o_req_dn );
 249         lsc->msc_bound = META_BOUND;
 250         lc->mc_bound_target = candidate;
 251
 252         if ( li->savecred ) {
 253                 if ( !BER_BVISNULL( &lsc->msc_cred ) ) {
 254                         /* destroy sensitive data */
 255                         memset( lsc->msc_cred.bv_val, 0, lsc->msc_cred.bv_len );
 256                         ber_memfree( lsc->msc_cred.bv_val );
 257                 }
 258                 ber_dupbv( &lsc->msc_cred, &op->orb_cred );
 259                 ldap_set_rebind_proc( lsc->msc_ld, meta_back_rebind, lsc );
 260         }
 261
 262         if ( li->cache.ttl != META_DNCACHE_DISABLED
 263                         && op->o_req_ndn.bv_len != 0 ) {
 264                 ( void )meta_dncache_update_entry( &li->cache,
 265                                 &op->o_req_ndn, candidate );
 266         }
 267
 268 return_results:;
 269
 270         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 271                 free( mdn.bv_val );
 272         }
 273
 274         return rs->sr_err;
 275 }
 276
 277 /*
 278  * meta_back_dobind
 279  */
 280 int
 281 meta_back_dobind( struct metaconn *lc, Operation *op )
 282 {
 283         struct metasingleconn   *lsc;
 284         int                     bound = 0, i;
 285
 286         /*
 287          * all the targets are bound as pseudoroot
 288          */
 289         if ( lc->mc_bound_target == META_BOUND_ALL ) {
 290                 return 1;
 291         }
 292
 293         for ( i = 0, lsc = lc->mc_conns; !META_LAST( lsc ); ++i, ++lsc ) {
 294                 int             rc;
 295                 struct berval   cred = BER_BVC("");
 296                 int             msgid;
 297
 298                 /*
 299                  * Not a candidate or something wrong with this target ...
 300                  */
 301                 if ( lsc->msc_ld == NULL ) {
 302                         continue;
 303                 }
 304
 305                 /*
 306                  * If required, set controls
 307                  */
 308                 if ( op->o_ctrls ) {
 309                         if ( ldap_set_option( lsc->msc_ld, LDAP_OPT_SERVER_CONTROLS,
 310                                         op->o_ctrls ) != LDAP_SUCCESS ) {
 311                                 ( void )meta_clear_one_candidate( lsc, 1 );
 312                                 continue;
 313                         }
 314                 }
 315
 316                 /*
 317                  * If the target is already bound it is skipped
 318                  */
 319                 if ( lsc->msc_bound == META_BOUND && lc->mc_bound_target == i ) {
 320                         ++bound;
 321                         continue;
 322                 }
 323
 324                 /*
 325                  * Otherwise an anonymous bind is performed
 326                  * (note: if the target was already bound, the anonymous
 327                  * bind clears the previous bind).
 328                  */
 329                 if ( !BER_BVISNULL( &lsc->msc_bound_ndn ) ) {
 330                         ber_memfree( lsc->msc_bound_ndn.bv_val );
 331                         BER_BVZERO( &lsc->msc_bound_ndn );
 332                 }
 333
 334                 if ( /* FIXME: need li ... li->savecred && */
 335                                 !BER_BVISNULL( &lsc->msc_cred ) )
 336                 {
 337                         /* destroy sensitive data */
 338                         memset( lsc->msc_cred.bv_val, 0, lsc->msc_cred.bv_len );
 339                         ber_memfree( lsc->msc_cred.bv_val );
 340                         BER_BVZERO( &lsc->msc_cred );
 341                 }
 342
 343                 rc = ldap_sasl_bind( lsc->msc_ld, "", LDAP_SASL_SIMPLE, &cred,
 344                                 op->o_ctrls, NULL, &msgid );
 345                 if ( rc == LDAP_SUCCESS ) {
 346                         LDAPMessage     *res;
 347                         struct timeval  tv = { 0, 0 };
 348                         int             err;
 349
 350                         /*
 351                          * handle response!!!
 352                          */
 353 retry:;
 354                         switch ( ldap_result( lsc->msc_ld, msgid, 0, &tv, &res ) ) {
 355                         case 0:
 356                                 ldap_pvt_thread_yield();
 357                                 tv.tv_sec = 0;
 358                                 tv.tv_usec = 100000;    /* 0.1 s */
 359                                 goto retry;
 360
 361                         case -1:
 362                                 ldap_get_option( lsc->msc_ld, LDAP_OPT_ERROR_NUMBER,
 363                                                 &rc );
 364                                 break;
 365
 366                         default:
 367                                 rc = ldap_parse_result( lsc->msc_ld, res, &err,
 368                                                 NULL, NULL, NULL, NULL, 1 );
 369                                 if ( rc == LDAP_SUCCESS ) {
 370                                         rc = err;
 371                                 }
 372                                 break;
 373                         }
 374                 }
 375
 376                 if ( rc != LDAP_SUCCESS ) {
 377                         Debug( LDAP_DEBUG_ANY,
 378                                         "==>meta_back_dobind: (anonymous)"
 379                                         " bind failed"
 380                                         " with error %d (%s)\n",
 381                                         rc, ldap_err2string( rc ), 0 );
 382
 383                         /*
 384                          * null cred bind should always succeed
 385                          * as anonymous, so a failure means
 386                          * the target is no longer candidate possibly
 387                          * due to technical reasons (remote host down?)
 388                          * so better clear the handle
 389                          */
 390                         ( void )meta_clear_one_candidate( lsc, 1 );
 391                         continue;
 392                 } /* else */
 393
 394                 lsc->msc_bound = META_ANONYMOUS;
 395                 ++bound;
 396         }
 397
 398         return( bound > 0 );
 399 }
 400
 401 /*
 402  *
 403  */
 404 int
 405 meta_back_is_valid( struct metaconn *lc, int candidate )
 406 {
 407         struct metasingleconn   *lsc;
 408         int                     i;
 409
 410         assert( lc );
 411
 412         if ( candidate < 0 ) {
 413                 return 0;
 414         }
 415
 416         for ( i = 0, lsc = lc->mc_conns; !META_LAST( lsc ) && i < candidate;
 417                         ++i, ++lsc );
 418
 419         if ( !META_LAST( lsc ) ) {
 420                 return ( lsc->msc_ld != NULL );
 421         }
 422
 423         return 0;
 424 }
 425
 426 /*
 427  * meta_back_rebind
 428  *
 429  * This is a callback used for chasing referrals using the same
 430  * credentials as the original user on this session.
 431  */
 432 static int
 433 meta_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
 434         ber_int_t msgid, void *params )
 435 {
 436         struct metasingleconn   *lsc = params;
 437
 438         return ldap_sasl_bind_s( ld, lsc->msc_bound_ndn.bv_val,
 439                         LDAP_SASL_SIMPLE, &lsc->msc_cred,
 440                         NULL, NULL, NULL );
 441 }
 442
 443 /*
 444  * FIXME: error return must be handled in a cleaner way ...
 445  */
 446 int
 447 meta_back_op_result( struct metaconn *lc, Operation *op, SlapReply *rs )
 448 {
 449         int                     i,
 450                                 rerr = LDAP_SUCCESS;
 451         struct metasingleconn   *lsc;
 452         char                    *rmsg = NULL;
 453         char                    *rmatch = NULL;
 454         int                     free_rmsg = 0,
 455                                 free_rmatch = 0;
 456
 457         for ( i = 0, lsc = lc->mc_conns; !META_LAST( lsc ); ++i, ++lsc ) {
 458                 char    *msg = NULL;
 459                 char    *match = NULL;
 460
 461                 rs->sr_err = LDAP_SUCCESS;
 462
 463                 ldap_get_option( lsc->msc_ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 464                 if ( rs->sr_err != LDAP_SUCCESS ) {
 465                         /*
 466                          * better check the type of error. In some cases
 467                          * (search ?) it might be better to return a
 468                          * success if at least one of the targets gave
 469                          * positive result ...
 470                          */
 471                         ldap_get_option( lsc->msc_ld,
 472                                         LDAP_OPT_ERROR_STRING, &msg );
 473                         ldap_get_option( lsc->msc_ld,
 474                                         LDAP_OPT_MATCHED_DN, &match );
 475                         rs->sr_err = slap_map_api2result( rs );
 476
 477                         Debug(LDAP_DEBUG_ANY,
 478                                         "==> meta_back_op_result: target"
 479                                         " <%d> sending msg \"%s\""
 480                                         " (matched \"%s\")\n",
 481                                         i, ( msg ? msg : "" ),
 482                                         ( match ? match : "" ) );
 483
 484                         /*
 485                          * FIXME: need to rewrite "match" (need rwinfo)
 486                          */
 487                         switch ( rs->sr_err ) {
 488                         default:
 489                                 rerr = rs->sr_err;
 490                                 if ( rmsg ) {
 491                                         ber_memfree( rmsg );
 492                                 }
 493                                 rmsg = msg;
 494                                 free_rmsg = 1;
 495                                 msg = NULL;
 496                                 if ( rmatch ) {
 497                                         ber_memfree( rmatch );
 498                                 }
 499                                 rmatch = match;
 500                                 free_rmatch = 1;
 501                                 match = NULL;
 502                                 break;
 503                         }
 504
 505                         /* better test the pointers before freeing? */
 506                         if ( match ) {
 507                                 free( match );
 508                         }
 509                         if ( msg ) {
 510                                 free( msg );
 511                         }
 512                 }
 513         }
 514
 515         rs->sr_err = rerr;
 516         rs->sr_text = rmsg;
 517         rs->sr_matched = rmatch;
 518         send_ldap_result( op, rs );
 519         if ( free_rmsg ) {
 520                 ber_memfree( rmsg );
 521         }
 522         if ( free_rmatch ) {
 523                 ber_memfree( rmatch );
 524         }
 525         rs->sr_text = NULL;
 526         rs->sr_matched = NULL;
 527
 528         return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
 529 }
 530