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 #ifdef NEW_LOGGING
  58         LDAP_LOG( BACK_META, ENTRY, "meta_back_bind: dn: %s.\n",
  59                         op->o_req_dn.bv_val, 0, 0 );
  60 #else /* !NEW_LOGGING */
  61         Debug( LDAP_DEBUG_ARGS, "meta_back_bind: dn: %s.\n%s%s",
  62                         op->o_req_dn.bv_val, "", "" );
  63 #endif /* !NEW_LOGGING */
  64
  65         if ( op->oq_bind.rb_method == LDAP_AUTH_SIMPLE && be_isroot_pw( op ) ) {
  66                 isroot = 1;
  67                 ber_dupbv( &op->oq_bind.rb_edn, be_root_dn( op->o_bd ) );
  68                 op_type = META_OP_REQUIRE_ALL;
  69         }
  70         lc = meta_back_getconn( op, rs, op_type,
  71                         &op->o_req_ndn, NULL );
  72         if ( !lc ) {
  73 #ifdef NEW_LOGGING
  74                 LDAP_LOG( BACK_META, NOTICE,
  75                                 "meta_back_bind: no target for dn %s.\n",
  76                                 op->o_req_dn.bv_val, 0, 0 );
  77 #else /* !NEW_LOGGING */
  78                 Debug( LDAP_DEBUG_ANY,
  79                                 "meta_back_bind: no target for dn %s.\n%s%s",
  80                                 op->o_req_dn.bv_val, "", "");
  81 #endif /* !NEW_LOGGING */
  82
  83                 send_ldap_result( op, rs );
  84                 return -1;
  85         }
  86
  87         /*
  88          * Each target is scanned ...
  89          */
  90         lc->bound_target = META_BOUND_NONE;
  91         ndnlen = op->o_req_ndn.bv_len;
  92         for ( i = 0; i < li->ntargets; i++ ) {
  93                 int             lerr;
  94                 struct berval   orig_dn = op->o_req_dn;
  95                 struct berval   orig_ndn = op->o_req_ndn;
  96                 struct berval   orig_cred = op->oq_bind.rb_cred;
  97                 int             orig_method = op->oq_bind.rb_method;
  98
  99
 100                 /*
 101                  * Skip non-candidates
 102                  */
 103                 if ( lc->conns[ i ].candidate != META_CANDIDATE ) {
 104                         continue;
 105                 }
 106
 107                 if ( gotit == 0 ) {
 108                         gotit = 1;
 109                 } else {
 110                         /*
 111                          * A bind operation is expected to have
 112                          * ONE CANDIDATE ONLY!
 113                          */
 114 #ifdef NEW_LOGGING
 115                         LDAP_LOG( BACK_META, WARNING,
 116                                         "==>meta_back_bind: more than one"
 117                                         " candidate is attempting to bind"
 118                                         " ...\n" , 0, 0, 0 );
 119 #else /* !NEW_LOGGING */
 120                         Debug( LDAP_DEBUG_ANY,
 121                                         "==>meta_back_bind: more than one"
 122                                         " candidate is attempting to bind"
 123                                         " ...\n%s%s%s",
 124                                         "", "", "" );
 125 #endif /* !NEW_LOGGING */
 126                 }
 127
 128                 if ( isroot && li->targets[ i ]->pseudorootdn.bv_val != NULL ) {
 129                         op->o_req_dn = li->targets[ i ]->pseudorootdn;
 130                         op->o_req_ndn = li->targets[ i ]->pseudorootdn;
 131                         op->oq_bind.rb_cred = li->targets[ i ]->pseudorootpw;
 132                         op->oq_bind.rb_method = LDAP_AUTH_SIMPLE;
 133                 }
 134
 135                 lerr = meta_back_do_single_bind( lc, op, rs, i );
 136                 if ( lerr != LDAP_SUCCESS ) {
 137                         rs->sr_err = lerr;
 138                         ( void )meta_clear_one_candidate( &lc->conns[ i ], 1 );
 139                 } else {
 140                         rc = LDAP_SUCCESS;
 141                 }
 142
 143                 op->o_req_dn = orig_dn;
 144                 op->o_req_ndn = orig_ndn;
 145                 op->oq_bind.rb_cred = orig_cred;
 146                 op->oq_bind.rb_method = orig_method;
 147         }
 148
 149         if ( isroot ) {
 150                 lc->bound_target = META_BOUND_ALL;
 151         }
 152
 153         /*
 154          * rc is LDAP_SUCCESS if at least one bind succeeded,
 155          * err is the last error that occurred during a bind;
 156          * if at least (and at most?) one bind succeedes, fine.
 157          */
 158         if ( rc != LDAP_SUCCESS /* && rs->sr_err != LDAP_SUCCESS */ ) {
 159
 160                 /*
 161                  * deal with bind failure ...
 162                  */
 163
 164                 /*
 165                  * no target was found within the naming context,
 166                  * so bind must fail with invalid credentials
 167                  */
 168                 if ( rs->sr_err == LDAP_SUCCESS && gotit == 0 ) {
 169                         rs->sr_err = LDAP_INVALID_CREDENTIALS;
 170                 }
 171
 172                 rs->sr_err = slap_map_api2result( rs );
 173                 send_ldap_result( op, rs );
 174                 return -1;
 175         }
 176
 177         return 0;
 178 }
 179
 180 /*
 181  * meta_back_do_single_bind
 182  *
 183  * attempts to perform a bind with creds
 184  */
 185 static int
 186 meta_back_do_single_bind(
 187                 struct metaconn         *lc,
 188                 Operation               *op,
 189                 SlapReply               *rs,
 190                 int                     candidate
 191 )
 192 {
 193         struct metainfo *li = ( struct metainfo * )op->o_bd->be_private;
 194         struct berval   mdn = BER_BVNULL;
 195         ber_int_t       msgid;
 196         dncookie        dc;
 197         struct metasingleconn   *lsc = &lc->conns[ candidate ];
 198
 199         /*
 200          * Rewrite the bind dn if needed
 201          */
 202         dc.rwmap = &li->targets[ candidate ]->rwmap;
 203         dc.conn = op->o_conn;
 204         dc.rs = rs;
 205         dc.ctx = "bindDN";
 206
 207         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
 208                 send_ldap_result( op, rs );
 209                 return -1;
 210         }
 211
 212         if ( op->o_ctrls ) {
 213                 rs->sr_err = ldap_set_option( lsc->ld,
 214                                 LDAP_OPT_SERVER_CONTROLS, op->o_ctrls );
 215                 if ( rs->sr_err != LDAP_SUCCESS ) {
 216                         rs->sr_err = slap_map_api2result( rs );
 217                         goto return_results;
 218                 }
 219         }
 220
 221         /* FIXME: this fixes the bind problem right now; we need
 222          * to use the asynchronous version to get the "matched"
 223          * and more in case of failure ... */
 224         rs->sr_err = ldap_sasl_bind( lsc->ld, mdn.bv_val,
 225                         LDAP_SASL_SIMPLE, &op->oq_bind.rb_cred,
 226                         op->o_ctrls, NULL, &msgid );
 227         if ( rs->sr_err == LDAP_SUCCESS ) {
 228                 LDAPMessage     *res;
 229                 struct timeval  tv = { 0, 0 };
 230                 int             rc;
 231
 232 retry:;
 233                 switch ( ldap_result( lsc->ld, msgid, 0, &tv, &res ) ) {
 234                 case 0:
 235                         tv.tv_sec = 0;
 236                         tv.tv_usec = 1000;      /* 0.001 s */
 237                         ldap_pvt_thread_yield();
 238                         goto retry;
 239
 240                 case -1:
 241                         ldap_get_option( lsc->ld, LDAP_OPT_ERROR_NUMBER,
 242                                         &rs->sr_err );
 243                         break;
 244
 245                 default:
 246                         rc = ldap_parse_result( lsc->ld, res, &rs->sr_err,
 247                                         NULL, NULL, NULL, NULL, 1 );
 248                         if ( rc != LDAP_SUCCESS ) {
 249                                 rs->sr_err = rc;
 250                         }
 251                         break;
 252                 }
 253         }
 254
 255         if ( rs->sr_err != LDAP_SUCCESS ) {
 256                 rs->sr_err = slap_map_api2result( rs );
 257                 goto return_results;
 258         }
 259
 260         /*
 261          * FIXME: handle response!!!
 262          */
 263         if ( lsc->bound_dn.bv_val != NULL ) {
 264                 ber_memfree( lsc->bound_dn.bv_val );
 265         }
 266         ber_dupbv( &lsc->bound_dn, &op->o_req_dn );
 267         lsc->bound = META_BOUND;
 268         lc->bound_target = candidate;
 269
 270         if ( li->savecred ) {
 271                 if ( lsc->cred.bv_val ) {
 272                         memset( lsc->cred.bv_val, 0, lsc->cred.bv_len );
 273                         ber_memfree( lsc->cred.bv_val );
 274                 }
 275                 ber_dupbv( &lsc->cred, &op->oq_bind.rb_cred );
 276                 ldap_set_rebind_proc( lsc->ld, meta_back_rebind, lsc );
 277         }
 278
 279         if ( li->cache.ttl != META_DNCACHE_DISABLED
 280                         && op->o_req_ndn.bv_len != 0 ) {
 281                 ( void )meta_dncache_update_entry( &li->cache,
 282                                 &op->o_req_ndn, candidate );
 283         }
 284
 285 return_results:;
 286
 287         if ( mdn.bv_val != op->o_req_dn.bv_val ) {
 288                 free( mdn.bv_val );
 289         }
 290
 291         return rs->sr_err;
 292 }
 293
 294 /*
 295  * meta_back_dobind
 296  */
 297 int
 298 meta_back_dobind( struct metaconn *lc, Operation *op )
 299 {
 300         struct metasingleconn *lsc;
 301         int bound = 0, i;
 302
 303         /*
 304          * all the targets are bound as pseudoroot
 305          */
 306         if ( lc->bound_target == META_BOUND_ALL ) {
 307                 return 1;
 308         }
 309
 310         for ( i = 0, lsc = lc->conns; !META_LAST(lsc); ++i, ++lsc ) {
 311                 int             rc;
 312                 struct berval   cred = BER_BVC("");
 313                 int             msgid;
 314
 315                 /*
 316                  * Not a candidate or something wrong with this target ...
 317                  */
 318                 if ( lsc->ld == NULL ) {
 319                         continue;
 320                 }
 321
 322                 /*
 323                  * If required, set controls
 324                  */
 325                 if ( op->o_ctrls ) {
 326                         if ( ldap_set_option( lsc->ld, LDAP_OPT_SERVER_CONTROLS,
 327                                         op->o_ctrls ) != LDAP_SUCCESS ) {
 328                                 ( void )meta_clear_one_candidate( lsc, 1 );
 329                                 continue;
 330                         }
 331                 }
 332
 333                 /*
 334                  * If the target is already bound it is skipped
 335                  */
 336                 if ( lsc->bound == META_BOUND && lc->bound_target == i ) {
 337                         ++bound;
 338                         continue;
 339                 }
 340
 341                 /*
 342                  * Otherwise an anonymous bind is performed
 343                  * (note: if the target was already bound, the anonymous
 344                  * bind clears the previous bind).
 345                  */
 346                 if ( lsc->bound_dn.bv_val ) {
 347                         ber_memfree( lsc->bound_dn.bv_val );
 348                         lsc->bound_dn.bv_val = NULL;
 349                         lsc->bound_dn.bv_len = 0;
 350                 }
 351
 352                 if ( /* FIXME: need li ... li->savecred && */
 353                                 lsc->cred.bv_val ) {
 354                         memset( lsc->cred.bv_val, 0, lsc->cred.bv_len );
 355                         ber_memfree( lsc->cred.bv_val );
 356                         lsc->cred.bv_val = NULL;
 357                         lsc->cred.bv_len = 0;
 358                 }
 359
 360                 rc = ldap_sasl_bind( lsc->ld, "", LDAP_SASL_SIMPLE, &cred,
 361                                 NULL, NULL, &msgid );
 362                 if ( rc == LDAP_SUCCESS ) {
 363                         LDAPMessage     *res;
 364                         struct timeval  tv = { 0, 0 };
 365                         int             err;
 366
 367 retry:;
 368                         switch ( ldap_result( lsc->ld, msgid, 0, &tv, &res ) ) {
 369                         case 0:
 370                                 tv.tv_sec = 0;
 371                                 tv.tv_usec = 1000;      /* 0.001 s */
 372                                 ldap_pvt_thread_yield();
 373                                 goto retry;
 374
 375                         case -1:
 376                                 ldap_get_option( lsc->ld, LDAP_OPT_ERROR_NUMBER,
 377                                                 &rc );
 378                                 break;
 379
 380                         default:
 381                                 rc = ldap_parse_result( lsc->ld, res, &err,
 382                                                 NULL, NULL, NULL, NULL, 1 );
 383                                 if ( rc == LDAP_SUCCESS ) {
 384                                         rc = err;
 385                                 }
 386                                 break;
 387                         }
 388                 }
 389
 390                 if ( rc != LDAP_SUCCESS ) {
 391 #ifdef NEW_LOGGING
 392                         LDAP_LOG( BACK_META, WARNING,
 393                                         "meta_back_dobind: (anonymous)"
 394                                         " bind failed"
 395                                         " with error %d (%s)\n",
 396                                         rc, ldap_err2string( rc ), 0 );
 397 #else /* !NEW_LOGGING */
 398                         Debug( LDAP_DEBUG_ANY,
 399                                         "==>meta_back_dobind: (anonymous)"
 400                                         " bind failed"
 401                                         " with error %d (%s)\n",
 402                                         rc, ldap_err2string( rc ), 0 );
 403 #endif /* !NEW_LOGGING */
 404
 405                         /*
 406                          * null cred bind should always succeed
 407                          * as anonymous, so a failure means
 408                          * the target is no longer candidate possibly
 409                          * due to technical reasons (remote host down?)
 410                          * so better clear the handle
 411                          */
 412                         ( void )meta_clear_one_candidate( lsc, 1 );
 413                         continue;
 414                 } /* else */
 415
 416                 lsc->bound = META_ANONYMOUS;
 417                 ++bound;
 418         }
 419
 420         return( bound > 0 );
 421 }
 422
 423 /*
 424  *
 425  */
 426 int
 427 meta_back_is_valid( struct metaconn *lc, int candidate )
 428 {
 429         struct metasingleconn   *lsc;
 430         int                     i;
 431
 432         assert( lc );
 433
 434         if ( candidate < 0 ) {
 435                 return 0;
 436         }
 437
 438         for ( i = 0, lsc = lc->conns; !META_LAST(lsc) && i < candidate;
 439                         ++i, ++lsc );
 440
 441         if ( !META_LAST(lsc) ) {
 442                 return( lsc->ld != NULL );
 443         }
 444
 445         return 0;
 446 }
 447
 448 /*
 449  * meta_back_rebind
 450  *
 451  * This is a callback used for chasing referrals using the same
 452  * credentials as the original user on this session.
 453  */
 454 static int
 455 meta_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
 456         ber_int_t msgid, void *params )
 457 {
 458         struct metasingleconn *lc = params;
 459
 460         return ldap_bind_s( ld, lc->bound_dn.bv_val, lc->cred.bv_val,
 461                         LDAP_AUTH_SIMPLE );
 462 }
 463
 464 /*
 465  * FIXME: error return must be handled in a cleaner way ...
 466  */
 467 int
 468 meta_back_op_result( struct metaconn *lc, Operation *op, SlapReply *rs )
 469 {
 470         int i, rerr = LDAP_SUCCESS;
 471         struct metasingleconn *lsc;
 472         char *rmsg = NULL;
 473         char *rmatch = NULL;
 474         int     free_rmsg = 0, free_rmatch = 0;
 475
 476         for ( i = 0, lsc = lc->conns; !META_LAST(lsc); ++i, ++lsc ) {
 477                 char *msg = NULL;
 478                 char *match = NULL;
 479
 480                 rs->sr_err = LDAP_SUCCESS;
 481
 482                 ldap_get_option( lsc->ld, LDAP_OPT_ERROR_NUMBER, &rs->sr_err );
 483                 if ( rs->sr_err != LDAP_SUCCESS ) {
 484                         /*
 485                          * better check the type of error. In some cases
 486                          * (search ?) it might be better to return a
 487                          * success if at least one of the targets gave
 488                          * positive result ...
 489                          */
 490                         ldap_get_option( lsc->ld,
 491                                         LDAP_OPT_ERROR_STRING, &msg );
 492                         ldap_get_option( lsc->ld,
 493                                         LDAP_OPT_MATCHED_DN, &match );
 494                         rs->sr_err = slap_map_api2result( rs );
 495
 496 #ifdef NEW_LOGGING
 497                         LDAP_LOG( BACK_META, RESULTS,
 498                                         "meta_back_op_result: target"
 499                                         " <%d> sending msg \"%s\""
 500                                         " (matched \"%s\")\n",
 501                                         i, ( msg ? msg : "" ),
 502                                         ( match ? match : "" ) );
 503 #else /* !NEW_LOGGING */
 504                         Debug(LDAP_DEBUG_ANY,
 505                                         "==> meta_back_op_result: target"
 506                                         " <%d> sending msg \"%s\""
 507                                         " (matched \"%s\")\n",
 508                                         i, ( msg ? msg : "" ),
 509                                         ( match ? match : "" ) );
 510 #endif /* !NEW_LOGGING */
 511
 512                         /*
 513                          * FIXME: need to rewrite "match" (need rwinfo)
 514                          */
 515                         switch ( rs->sr_err ) {
 516                         default:
 517                                 rerr = rs->sr_err;
 518                                 if ( rmsg ) {
 519                                         ber_memfree( rmsg );
 520                                 }
 521                                 rmsg = msg;
 522                                 free_rmsg = 1;
 523                                 msg = NULL;
 524                                 if ( rmatch ) {
 525                                         ber_memfree( rmatch );
 526                                 }
 527                                 rmatch = match;
 528                                 free_rmatch = 1;
 529                                 match = NULL;
 530                                 break;
 531                         }
 532
 533                         /* better test the pointers before freeing? */
 534                         if ( match ) {
 535                                 free( match );
 536                         }
 537                         if ( msg ) {
 538                                 free( msg );
 539                         }
 540                 }
 541         }
 542
 543         rs->sr_err = rerr;
 544         rs->sr_text = rmsg;
 545         rs->sr_matched = rmatch;
 546         send_ldap_result( op, rs );
 547         if ( free_rmsg ) {
 548                 ber_memfree( rmsg );
 549         }
 550         if ( free_rmatch ) {
 551                 ber_memfree( rmatch );
 552         }
 553         rs->sr_text = NULL;
 554         rs->sr_matched = NULL;
 555
 556         return ( ( rerr == LDAP_SUCCESS ) ? 0 : -1 );
 557 }
 558