git.sur5r.net Git - openldap/blob - servers/slapd/back-ldap/bind.c

   1 /* bind.c - ldap backend bind function */
   2 /* $OpenLDAP$ */
   3 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
   4  *
   5  * Copyright 1999-2004 The OpenLDAP Foundation.
   6  * Portions Copyright 2000-2003 Pierangelo Masarati.
   7  * Portions Copyright 1999-2003 Howard Chu.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted only as authorized by the OpenLDAP
  12  * Public License.
  13  *
  14  * A copy of this license is available in the file LICENSE in the
  15  * top-level directory of the distribution or, alternatively, at
  16  * <http://www.OpenLDAP.org/license.html>.
  17  */
  18 /* ACKNOWLEDGEMENTS:
  19  * This work was initially developed by the Howard Chu for inclusion
  20  * in OpenLDAP Software and subsequently enhanced by Pierangelo
  21  * Masarati.
  22  */
  23
  24 #include "portable.h"
  25
  26 #include <stdio.h>
  27
  28 #include <ac/socket.h>
  29 #include <ac/string.h>
  30
  31 #define AVL_INTERNAL
  32 #include "slap.h"
  33 #include "back-ldap.h"
  34
  35 #include <lutil_ldap.h>
  36
  37 #define PRINT_CONNTREE 0
  38
  39 static LDAP_REBIND_PROC ldap_back_rebind;
  40
  41 int
  42 ldap_back_bind(
  43     Operation           *op,
  44     SlapReply           *rs )
  45 {
  46         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
  47         struct ldapconn *lc;
  48
  49         struct berval mdn = BER_BVNULL;
  50         int rc = 0;
  51         ber_int_t msgid;
  52         dncookie dc;
  53
  54         lc = ldap_back_getconn(op, rs);
  55         if ( !lc ) {
  56                 return( -1 );
  57         }
  58
  59         /*
  60          * Rewrite the bind dn if needed
  61          */
  62         dc.rwmap = &li->rwmap;
  63 #ifdef ENABLE_REWRITE
  64         dc.conn = op->o_conn;
  65         dc.rs = rs;
  66         dc.ctx = "bindDN";
  67 #else
  68         dc.tofrom = 1;
  69         dc.normalized = 0;
  70 #endif
  71         if ( ldap_back_dn_massage( &dc, &op->o_req_dn, &mdn ) ) {
  72                 send_ldap_result( op, rs );
  73                 return -1;
  74         }
  75
  76         if ( !BER_BVISNULL( &lc->bound_dn ) ) {
  77                 ch_free( lc->bound_dn.bv_val );
  78                 BER_BVZERO( &lc->bound_dn );
  79         }
  80         lc->bound = 0;
  81         /* method is always LDAP_AUTH_SIMPLE if we got here */
  82         rs->sr_err = ldap_sasl_bind(lc->ld, mdn.bv_val, LDAP_SASL_SIMPLE,
  83                 &op->oq_bind.rb_cred, op->o_ctrls, NULL, &msgid);
  84         rc = ldap_back_op_result( lc, op, rs, msgid, 1 );
  85         if (rc == LDAP_SUCCESS) {
  86                 lc->bound = 1;
  87                 if ( mdn.bv_val != op->o_req_dn.bv_val ) {
  88                         lc->bound_dn = mdn;
  89                 } else {
  90                         ber_dupbv( &lc->bound_dn, &op->o_req_dn );
  91                 }
  92                 BER_BVZERO( &mdn );
  93
  94                 if ( li->savecred ) {
  95                         if ( !BER_BVISNULL( &lc->cred ) ) {
  96                                 memset( lc->cred.bv_val, 0, lc->cred.bv_len );
  97                                 ch_free( lc->cred.bv_val );
  98                         }
  99                         ber_dupbv( &lc->cred, &op->oq_bind.rb_cred );
 100                         ldap_set_rebind_proc( lc->ld, ldap_back_rebind, lc );
 101                 }
 102         }
 103
 104         /* must re-insert if local DN changed as result of bind */
 105         if ( lc->bound && !bvmatch(&op->o_req_ndn, &lc->local_dn ) ) {
 106                 int lerr;
 107
 108                 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
 109                 lc = avl_delete( &li->conntree, (caddr_t)lc,
 110                                 ldap_back_conn_cmp );
 111                 if ( !BER_BVISNULL( &lc->local_dn ) )
 112                         ch_free( lc->local_dn.bv_val );
 113                 ber_dupbv( &lc->local_dn, &op->o_req_ndn );
 114                 lerr = avl_insert( &li->conntree, (caddr_t)lc,
 115                         ldap_back_conn_cmp, ldap_back_conn_dup );
 116                 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
 117                 if ( lerr == -1 ) {
 118                         ldap_back_conn_free( lc );
 119                 }
 120         }
 121
 122         if ( !BER_BVISNULL( &mdn ) && mdn.bv_val != op->o_req_dn.bv_val ) {
 123                 free( mdn.bv_val );
 124         }
 125
 126         return( rc );
 127 }
 128
 129 /*
 130  * ldap_back_conn_cmp
 131  *
 132  * compares two struct ldapconn based on the value of the conn pointer;
 133  * used by avl stuff
 134  */
 135 int
 136 ldap_back_conn_cmp(
 137         const void *c1,
 138         const void *c2
 139         )
 140 {
 141         const struct ldapconn *lc1 = (const struct ldapconn *)c1;
 142         const struct ldapconn *lc2 = (const struct ldapconn *)c2;
 143         int rc;
 144
 145         /* If local DNs don't match, it is definitely not a match */
 146         if ( ( rc = ber_bvcmp( &lc1->local_dn, &lc2->local_dn )) )
 147                 return rc;
 148
 149         /* For shared sessions, conn is NULL. Only explicitly
 150          * bound sessions will have non-NULL conn.
 151          */
 152         return SLAP_PTRCMP(lc1->conn, lc2->conn);
 153 }
 154
 155 /*
 156  * ldap_back_conn_dup
 157  *
 158  * returns -1 in case a duplicate struct ldapconn has been inserted;
 159  * used by avl stuff
 160  */
 161 int
 162 ldap_back_conn_dup(
 163         void *c1,
 164         void *c2
 165         )
 166 {
 167         struct ldapconn *lc1 = (struct ldapconn *)c1;
 168         struct ldapconn *lc2 = (struct ldapconn *)c2;
 169
 170         /* Cannot have more than one shared session with same DN */
 171         if ( dn_match( &lc1->local_dn, &lc2->local_dn ) &&
 172                  lc1->conn == lc2->conn ) return -1;
 173
 174         return 0;
 175 }
 176
 177 #if PRINT_CONNTREE > 0
 178 static void ravl_print( Avlnode *root, int depth )
 179 {
 180         int     i;
 181         struct ldapconn *lc;
 182
 183         if ( root == 0 )
 184                 return;
 185
 186         ravl_print( root->avl_right, depth+1 );
 187
 188         for ( i = 0; i < depth; i++ )
 189                 printf( "   " );
 190
 191         lc = root->avl_data;
 192         printf( "lc(%lx) local(%s) conn(%lx) %d\n",
 193                         lc, lc->local_dn.bv_val, lc->conn, root->avl_bf );
 194
 195         ravl_print( root->avl_left, depth+1 );
 196 }
 197
 198 static void myprint( Avlnode *root )
 199 {
 200         printf( "********\n" );
 201
 202         if ( root == 0 )
 203                 printf( "\tNULL\n" );
 204
 205         else
 206                 ravl_print( root, 0 );
 207
 208         printf( "********\n" );
 209 }
 210 #endif /* PRINT_CONNTREE */
 211
 212 struct ldapconn *
 213 ldap_back_getconn(Operation *op, SlapReply *rs)
 214 {
 215         struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
 216         struct ldapconn *lc, lc_curr;
 217         LDAP *ld;
 218         int is_priv = 0;
 219
 220         /* Searches for a ldapconn in the avl tree */
 221
 222         /* Explicit binds must not be shared */
 223         if ( op->o_tag == LDAP_REQ_BIND
 224                 || (op->o_conn
 225                   && (op->o_bd == op->o_conn->c_authz_backend ))) {
 226                 lc_curr.conn = op->o_conn;
 227         } else {
 228                 lc_curr.conn = NULL;
 229         }
 230
 231         /* Internal searches are privileged and shared. So is root. */
 232         if ( op->o_do_not_cache || be_isroot_dn( li->be, &op->o_ndn ) ) {
 233                 lc_curr.local_dn = li->be->be_rootndn;
 234                 lc_curr.conn = NULL;
 235                 is_priv = 1;
 236         } else {
 237                 lc_curr.local_dn = op->o_ndn;
 238         }
 239
 240         ldap_pvt_thread_mutex_lock( &li->conn_mutex );
 241         lc = (struct ldapconn *)avl_find( li->conntree,
 242                 (caddr_t)&lc_curr, ldap_back_conn_cmp );
 243         ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
 244
 245         /* Looks like we didn't get a bind. Open a new session... */
 246         if (!lc) {
 247                 int vers = op->o_protocol;
 248                 rs->sr_err = ldap_initialize(&ld, li->url);
 249
 250                 if (rs->sr_err != LDAP_SUCCESS) {
 251                         rs->sr_err = slap_map_api2result( rs );
 252                         if (rs->sr_text == NULL) {
 253                                 rs->sr_text = "ldap_initialize() failed";
 254                         }
 255                         if (op->o_conn) send_ldap_result( op, rs );
 256                         rs->sr_text = NULL;
 257                         return( NULL );
 258                 }
 259                 /* Set LDAP version. This will always succeed: If the client
 260                  * bound with a particular version, then so can we.
 261                  */
 262                 ldap_set_option(ld, LDAP_OPT_PROTOCOL_VERSION,
 263                                 (const void *)&vers);
 264                 /* FIXME: configurable? */
 265                 ldap_set_option(ld, LDAP_OPT_REFERRALS, LDAP_OPT_ON);
 266
 267                 lc = (struct ldapconn *)ch_malloc(sizeof(struct ldapconn));
 268                 lc->conn = lc_curr.conn;
 269                 lc->ld = ld;
 270                 ber_dupbv( &lc->local_dn, &lc_curr.local_dn );
 271
 272 #ifdef ENABLE_REWRITE
 273                 /*
 274                  * Sets a cookie for the rewrite session
 275                  *
 276                  * FIXME: the o_conn might be no longer valid,
 277                  * since we may have different entries
 278                  * for the same connection
 279                  */
 280                 ( void )rewrite_session_init( li->rwmap.rwm_rw, op->o_conn );
 281 #endif /* ENABLE_REWRITE */
 282
 283                 ldap_pvt_thread_mutex_init( &lc->lc_mutex );
 284
 285                 if ( is_priv ) {
 286                         ber_dupbv( &lc->cred, &li->bindpw );
 287                         ber_dupbv( &lc->bound_dn, &li->binddn );
 288                 } else {
 289                         BER_BVZERO( &lc->cred );
 290                         BER_BVZERO( &lc->bound_dn );
 291                         if ( op->o_conn && !BER_BVISEMPTY( &op->o_conn->c_dn )
 292                                         && ( op->o_bd == op->o_conn->c_authz_backend ) ) {
 293
 294                                 dncookie dc;
 295                                 struct berval bv;
 296
 297                                 /*
 298                                  * Rewrite the bind dn if needed
 299                                  */
 300                                 dc.rwmap = &li->rwmap;
 301 #ifdef ENABLE_REWRITE
 302                                 dc.conn = op->o_conn;
 303                                 dc.rs = rs;
 304                                 dc.ctx = "bindDN";
 305 #else
 306                                 dc.tofrom = 1;
 307                                 dc.normalized = 0;
 308 #endif
 309
 310                                 if ( ldap_back_dn_massage( &dc, &op->o_conn->c_dn, &bv ) ) {
 311                                         send_ldap_result( op, rs );
 312                                         return NULL;
 313                                 }
 314
 315                                 if ( bv.bv_val == op->o_conn->c_dn.bv_val ) {
 316                                         ber_dupbv( &lc->bound_dn, &bv );
 317                                 } else {
 318                                         lc->bound_dn = bv;
 319                                 }
 320                         }
 321                 }
 322
 323                 lc->bound = 0;
 324
 325                 /* Inserts the newly created ldapconn in the avl tree */
 326                 ldap_pvt_thread_mutex_lock( &li->conn_mutex );
 327                 rs->sr_err = avl_insert( &li->conntree, (caddr_t)lc,
 328                         ldap_back_conn_cmp, ldap_back_conn_dup );
 329
 330 #if PRINT_CONNTREE > 0
 331                 myprint( li->conntree );
 332 #endif /* PRINT_CONNTREE */
 333
 334                 ldap_pvt_thread_mutex_unlock( &li->conn_mutex );
 335
 336 #ifdef NEW_LOGGING
 337                 LDAP_LOG( BACK_LDAP, INFO,
 338                         "ldap_back_getconn: conn %p inserted\n", (void *) lc, 0, 0);
 339 #else /* !NEW_LOGGING */
 340                 Debug( LDAP_DEBUG_TRACE,
 341                         "=>ldap_back_getconn: conn %p inserted\n", (void *) lc, 0, 0 );
 342 #endif /* !NEW_LOGGING */
 343
 344                 /* Err could be -1 in case a duplicate ldapconn is inserted */
 345                 if ( rs->sr_err != 0 ) {
 346                         ldap_back_conn_free( lc );
 347                         if (op->o_conn) {
 348                                 send_ldap_error( op, rs, LDAP_OTHER,
 349                                 "internal server error" );
 350                         }
 351                         return( NULL );
 352                 }
 353         } else {
 354 #ifdef NEW_LOGGING
 355                 LDAP_LOG( BACK_LDAP, INFO,
 356                         "ldap_back_getconn: conn %p fetched\n",
 357                         (void *) lc, 0, 0 );
 358 #else /* !NEW_LOGGING */
 359                 Debug( LDAP_DEBUG_TRACE,
 360                         "=>ldap_back_getconn: conn %p fetched\n", (void *) lc, 0, 0 );
 361 #endif /* !NEW_LOGGING */
 362         }
 363
 364         return( lc );
 365 }
 366
 367 /*
 368  * ldap_back_dobind
 369  *
 370  * Note: as the check for the value of lc->bound was already here, I removed
 371  * it from all the callers, and I made the function return the flag, so
 372  * it can be used to simplify the check.
 373  */
 374 int
 375 ldap_back_dobind( struct ldapconn *lc, Operation *op, SlapReply *rs )
 376 {
 377         struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
 378         int rc;
 379         ber_int_t msgid;
 380
 381         ldap_pvt_thread_mutex_lock( &lc->lc_mutex );
 382         if ( !lc->bound ) {
 383 #ifdef LDAP_BACK_PROXY_AUTHZ
 384                 /*
 385                  * FIXME: we need to let clients use proxyAuthz
 386                  * otherwise we cannot do symmetric pools of servers;
 387                  * we have to live with the fact that a user can
 388                  * authorize itself as any ID that is allowed
 389                  * by the saslAuthzTo directive of the "proxyauthzdn".
 390                  */
 391                 /*
 392                  * NOTE: current Proxy Authorization specification
 393                  * and implementation do not allow proxy authorization
 394                  * control to be provided with Bind requests
 395                  */
 396                 /*
 397                  * if no bind took place yet, but the connection is bound
 398                  * and the "proxyauthzdn" is set, then bind as
 399                  * "proxyauthzdn" and explicitly add the proxyAuthz
 400                  * control to every operation with the dn bound
 401                  * to the connection as control value.
 402                  */
 403                 if ( op->o_conn != NULL
 404                                 && ( BER_BVISNULL( &lc->bound_dn ) || BER_BVISEMPTY( &lc->bound_dn ) ) ) {
 405                         struct berval   binddn = slap_empty_bv;
 406                         struct berval   bindcred = slap_empty_bv;
 407
 408                         /* bind as proxyauthzdn only if no idassert mode is requested,
 409                          * or if the client's identity is authorized */
 410                         switch ( li->idassert_mode ) {
 411                         case LDAP_BACK_IDASSERT_LEGACY:
 412                                 if ( !BER_BVISNULL( &op->o_conn->c_dn ) && !BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
 413                                         if ( li->idassert_authmethod != LDAP_AUTH_SASL
 414                                                         && !BER_BVISNULL( &li->idassert_authcDN ) && !BER_BVISEMPTY( &li->idassert_authcDN ) )
 415                                         {
 416                                                 binddn = li->idassert_authcDN;
 417                                                 bindcred = li->idassert_passwd;
 418                                         }
 419                                 }
 420                                 break;
 421
 422                         default:
 423                                 if ( li->idassert_authz ) {
 424                                         struct berval   authcDN = BER_BVISNULL( &op->o_conn->c_dn ) ? slap_empty_bv : op->o_conn->c_dn;
 425
 426                                         rs->sr_err = slap_sasl_matches( op, li->idassert_authz,
 427                                                         &authcDN, &authcDN );
 428                                         if ( rs->sr_err != LDAP_SUCCESS ) {
 429                                                 send_ldap_result( op, rs );
 430                                                 lc->bound = 0;
 431                                                 goto done;
 432                                         }
 433                                 }
 434
 435                                 if ( li->idassert_authmethod != LDAP_AUTH_SASL ) {
 436                                         binddn = li->idassert_authcDN;
 437                                 }
 438                                 bindcred = li->idassert_passwd;
 439                                 break;
 440                         }
 441
 442                         /* NOTE: essentially copied from clients/tools/common.c :) */
 443                         switch ( li->idassert_authmethod ) {
 444 #ifdef HAVE_CYRUS_SASL
 445                         case LDAP_AUTH_SASL:
 446                                 {
 447                                 void            *defaults = NULL;
 448                                 struct berval   authzID = BER_BVNULL;
 449
 450 #if 0   /* will deal with this later... */
 451                                 if ( sasl_secprops != NULL ) {
 452                                         rs->sr_err = ldap_set_option( lc->ld, LDAP_OPT_X_SASL_SECPROPS,
 453                                                 (void *) sasl_secprops );
 454
 455                                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
 456                                                 send_ldap_result( op, rs );
 457                                                 lc->bound = 0;
 458                                                 goto done;
 459
 460                                         }
 461                                 }
 462 #endif
 463
 464                                 switch ( li->idassert_mode ) {
 465                                 case LDAP_BACK_IDASSERT_OTHERID:
 466                                 case LDAP_BACK_IDASSERT_OTHERDN:
 467                                         authzID = li->idassert_authzID;
 468                                 }
 469
 470                                 defaults = lutil_sasl_defaults( lc->ld,
 471                                                 li->idassert_sasl_mech.bv_val,
 472                                                 li->idassert_sasl_realm.bv_val,
 473                                                 li->idassert_authcID.bv_val,
 474                                                 li->idassert_passwd.bv_val,
 475                                                 authzID.bv_val );
 476
 477                                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->ld, NULL,
 478                                                 li->idassert_sasl_mech.bv_val, NULL, NULL,
 479                                                 li->idassert_sasl_flags, lutil_sasl_interact,
 480                                                 defaults );
 481
 482                                 lutil_sasl_freedefs( defaults );
 483
 484                                 rs->sr_err = slap_map_api2result( rs );
 485                                 if ( rs->sr_err != LDAP_SUCCESS ) {
 486                                         lc->bound = 0;
 487                                         send_ldap_result( op, rs );
 488
 489                                 } else {
 490                                         lc->bound = 1;
 491                                 }
 492                                 goto done;
 493                                 }
 494 #endif /* HAVE_CYRUS_SASL */
 495
 496                         case LDAP_AUTH_SIMPLE:
 497                                 rs->sr_err = ldap_sasl_bind(lc->ld,
 498                                                 binddn.bv_val, LDAP_SASL_SIMPLE,
 499                                                 &bindcred, NULL, NULL, &msgid);
 500                                 break;
 501
 502                         case LDAP_AUTH_NONE:
 503                                 lc->bound = 1;
 504                                 goto done;
 505
 506                         default:
 507                                 /* unsupported! */
 508                                 lc->bound = 0;
 509                                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
 510                                 send_ldap_result( op, rs );
 511                                 goto done;
 512                         }
 513
 514                 } else
 515 #endif /* LDAP_BACK_PROXY_AUTHZ */
 516                 {
 517                         rs->sr_err = ldap_sasl_bind(lc->ld, lc->bound_dn.bv_val,
 518                                 LDAP_SASL_SIMPLE, &lc->cred, NULL, NULL, &msgid);
 519                 }
 520
 521                 rc = ldap_back_op_result( lc, op, rs, msgid, 0 );
 522                 if (rc == LDAP_SUCCESS) {
 523                         lc->bound = 1;
 524                 }
 525         }
 526
 527 done:;
 528         rc = lc->bound;
 529         ldap_pvt_thread_mutex_unlock( &lc->lc_mutex );
 530         return rc;
 531 }
 532
 533 /*
 534  * ldap_back_rebind
 535  *
 536  * This is a callback used for chasing referrals using the same
 537  * credentials as the original user on this session.
 538  */
 539 static int
 540 ldap_back_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
 541         ber_int_t msgid, void *params )
 542 {
 543         struct ldapconn *lc = params;
 544
 545         return ldap_bind_s( ld, lc->bound_dn.bv_val, lc->cred.bv_val, LDAP_AUTH_SIMPLE );
 546 }
 547
 548 #if 0 /* deprecated in favour of slap_map_api2result() */
 549 /* Map API errors to protocol errors... */
 550 int
 551 ldap_back_map_result( SlapReply *rs )
 552 {
 553         switch(rs->sr_err)
 554         {
 555         case LDAP_SERVER_DOWN:
 556                 return LDAP_UNAVAILABLE;
 557         case LDAP_LOCAL_ERROR:
 558                 return LDAP_OTHER;
 559         case LDAP_ENCODING_ERROR:
 560         case LDAP_DECODING_ERROR:
 561                 return LDAP_PROTOCOL_ERROR;
 562         case LDAP_TIMEOUT:
 563                 return LDAP_UNAVAILABLE;
 564         case LDAP_AUTH_UNKNOWN:
 565                 return LDAP_AUTH_METHOD_NOT_SUPPORTED;
 566         case LDAP_FILTER_ERROR:
 567                 rs->sr_text = "Filter error";
 568                 return LDAP_OTHER;
 569         case LDAP_USER_CANCELLED:
 570                 rs->sr_text = "User cancelled";
 571                 return LDAP_OTHER;
 572         case LDAP_PARAM_ERROR:
 573                 return LDAP_PROTOCOL_ERROR;
 574         case LDAP_NO_MEMORY:
 575                 return LDAP_OTHER;
 576         case LDAP_CONNECT_ERROR:
 577                 return LDAP_UNAVAILABLE;
 578         case LDAP_NOT_SUPPORTED:
 579                 return LDAP_UNWILLING_TO_PERFORM;
 580         case LDAP_CONTROL_NOT_FOUND:
 581                 return LDAP_PROTOCOL_ERROR;
 582         case LDAP_NO_RESULTS_RETURNED:
 583                 return LDAP_NO_SUCH_OBJECT;
 584         case LDAP_MORE_RESULTS_TO_RETURN:
 585                 rs->sr_text = "More results to return";
 586                 return LDAP_OTHER;
 587         case LDAP_CLIENT_LOOP:
 588         case LDAP_REFERRAL_LIMIT_EXCEEDED:
 589                 return LDAP_LOOP_DETECT;
 590         default:
 591                 if ( LDAP_API_ERROR(rs->sr_err) )
 592                         return LDAP_OTHER;
 593                 return rs->sr_err;
 594         }
 595 }
 596 #endif
 597
 598 int
 599 ldap_back_op_result(struct ldapconn *lc, Operation *op, SlapReply *rs,
 600         ber_int_t msgid, int sendok)
 601 {
 602         struct ldapinfo *li = (struct ldapinfo *)op->o_bd->be_private;
 603         char *match = NULL;
 604         LDAPMessage *res = NULL;
 605         char *text = NULL;
 606
 607 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
 608
 609         rs->sr_text = NULL;
 610         rs->sr_matched = NULL;
 611
 612         /* if the error recorded in the reply corresponds
 613          * to a successful state, get the error from the
 614          * remote server response */
 615         if ( ERR_OK( rs->sr_err ) ) {
 616                 /* if result parsing fails, note the failure reason */
 617                 if ( ldap_result( lc->ld, msgid, 1, NULL, &res ) == -1 ) {
 618                         ldap_get_option(lc->ld, LDAP_OPT_ERROR_NUMBER,
 619                                         &rs->sr_err);
 620
 621                 /* otherwise get the result; if it is not
 622                  * LDAP_SUCCESS, record it in the reply
 623                  * structure (this includes
 624                  * LDAP_COMPARE_{TRUE|FALSE}) */
 625                 } else {
 626                         int rc = ldap_parse_result(lc->ld, res, &rs->sr_err,
 627                                         &match, &text, NULL, NULL, 1);
 628                         rs->sr_text = text;
 629                         if ( rc != LDAP_SUCCESS ) rs->sr_err = rc;
 630                 }
 631         }
 632
 633         /* if the error in the reply structure is not
 634          * LDAP_SUCCESS, try to map it from client
 635          * to server error */
 636         if ( !ERR_OK( rs->sr_err ) ) {
 637                 rs->sr_err = slap_map_api2result( rs );
 638
 639                 /* internal ops ( op->o_conn == NULL )
 640                  * must not reply to client */
 641                 if ( op->o_conn && !op->o_do_not_cache && match ) {
 642                         struct berval dn, mdn;
 643                         dncookie dc;
 644
 645                         dc.rwmap = &li->rwmap;
 646 #ifdef ENABLE_REWRITE
 647                         dc.conn = op->o_conn;
 648                         dc.rs = rs;
 649                         dc.ctx = "matchedDN";
 650 #else
 651                         dc.tofrom = 0;
 652                         dc.normalized = 0;
 653 #endif
 654                         ber_str2bv(match, 0, 0, &dn);
 655                         ldap_back_dn_massage(&dc, &dn, &mdn);
 656
 657                         /* record the (massaged) matched
 658                          * DN into the reply structure */
 659                         rs->sr_matched = mdn.bv_val;
 660
 661                 }
 662         }
 663         if ( op->o_conn && ( sendok || rs->sr_err != LDAP_SUCCESS ) ) {
 664                 send_ldap_result( op, rs );
 665         }
 666         if ( match ) {
 667                 if ( rs->sr_matched != match ) {
 668                         free( (char *)rs->sr_matched );
 669                 }
 670                 rs->sr_matched = NULL;
 671                 ldap_memfree( match );
 672         }
 673         if ( text ) {
 674                 ldap_memfree( text );
 675         }
 676         rs->sr_text = NULL;
 677         return( ERR_OK( rs->sr_err ) ? 0 : -1 );
 678 }
 679
 680 #ifdef LDAP_BACK_PROXY_AUTHZ
 681 /*
 682  * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
 683  * to existing server-side controls if required; if not,
 684  * the existing server-side controls are placed in *pctrls.
 685  * The caller, after using the controls in client API
 686  * operations, if ( *pctrls != op->o_ctrls ), should
 687  * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
 688  * The function returns success if the control could
 689  * be added if required, or if it did nothing; in the future,
 690  * it might return some error if it failed.
 691  *
 692  * if no bind took place yet, but the connection is bound
 693  * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
 694  * and explicitly add proxyAuthz the control to every operation
 695  * with the dn bound to the connection as control value.
 696  *
 697  * If no server-side controls are defined for the operation,
 698  * simply add the proxyAuthz control; otherwise, if the
 699  * proxyAuthz control is not already set, add it as
 700  * the first one (FIXME: is controls order significant
 701  * for security?).
 702  */
 703 int
 704 ldap_back_proxy_authz_ctrl(
 705                 struct ldapconn *lc,
 706                 Operation       *op,
 707                 SlapReply       *rs,
 708                 LDAPControl     ***pctrls )
 709 {
 710         struct ldapinfo *li = (struct ldapinfo *) op->o_bd->be_private;
 711         LDAPControl     **ctrls = NULL;
 712         int             i = 0;
 713         struct berval   assertedID;
 714
 715         *pctrls = NULL;
 716
 717         if ( BER_BVISNULL( &li->idassert_authcID ) ) {
 718                 goto done;
 719         }
 720
 721         if ( !op->o_conn ) {
 722                 goto done;
 723         }
 724
 725         if ( li->idassert_mode == LDAP_BACK_IDASSERT_LEGACY ) {
 726                 if ( op->o_proxy_authz ) {
 727                         /*
 728                          * FIXME: we do not want to perform proxyAuthz
 729                          * on behalf of the client, because this would
 730                          * be performed with "proxyauthzdn" privileges.
 731                          *
 732                          * This might actually be too strict, since
 733                          * the "proxyauthzdn" saslAuthzTo, and each entry's
 734                          * saslAuthzFrom attributes may be crafted
 735                          * to avoid unwanted proxyAuthz to take place.
 736                          */
 737 #if 0
 738                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
 739                         rs->sr_text = "proxyAuthz not allowed within namingContext";
 740 #endif
 741                         goto done;
 742                 }
 743
 744                 if ( !BER_BVISNULL( &lc->bound_dn ) && !BER_BVISEMPTY( &lc->bound_dn ) ) {
 745                         goto done;
 746                 }
 747
 748                 if ( BER_BVISNULL( &op->o_conn->c_dn ) || BER_BVISEMPTY( &op->o_conn->c_dn ) ) {
 749                         goto done;
 750                 }
 751
 752                 if ( BER_BVISEMPTY( &li->idassert_authcID ) ) {
 753                         goto done;
 754                 }
 755
 756         } else if ( li->idassert_mode == LDAP_BACK_IDASSERT_OTHERID && li->idassert_authmethod == LDAP_AUTH_SASL ) {
 757                 /* already asserted in SASL */
 758                 goto done;
 759
 760         } else if ( li->idassert_authz ) {
 761                 int             rc;
 762                 struct berval   authcDN = BER_BVISNULL( &op->o_conn->c_dn ) ? slap_empty_bv : op->o_conn->c_dn;
 763
 764
 765                 rc = slap_sasl_matches( op, li->idassert_authz,
 766                                 &authcDN, & authcDN );
 767                 if ( rc != LDAP_SUCCESS ) {
 768                         /* op->o_conn->c_dn is not authorized
 769                          * to use idassert */
 770                         return rc;
 771                 }
 772         }
 773
 774         switch ( li->idassert_mode ) {
 775         case LDAP_BACK_IDASSERT_LEGACY:
 776         case LDAP_BACK_IDASSERT_SELF:
 777                 /* original behavior:
 778                  * assert the client's identity */
 779                 assertedID = op->o_conn->c_dn;
 780                 break;
 781
 782         case LDAP_BACK_IDASSERT_ANONYMOUS:
 783                 /* assert "anonymous" */
 784                 assertedID = slap_empty_bv;
 785                 break;
 786
 787         case LDAP_BACK_IDASSERT_NOASSERT:
 788                 /* don't assert; bind as proxyauthzdn */
 789                 goto done;
 790
 791         case LDAP_BACK_IDASSERT_OTHERID:
 792         case LDAP_BACK_IDASSERT_OTHERDN:
 793                 /* assert idassert DN */
 794                 assertedID = li->idassert_authzID;
 795                 break;
 796
 797         default:
 798                 assert( 0 );
 799         }
 800
 801         if ( BER_BVISNULL( &assertedID ) ) {
 802                 assertedID = slap_empty_bv;
 803         }
 804
 805         ctrls = ch_malloc( sizeof( LDAPControl * ) * (i + 2) );
 806         ctrls[ 0 ] = ch_malloc( sizeof( LDAPControl ) );
 807
 808         ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
 809         ctrls[ 0 ]->ldctl_iscritical = 1;
 810
 811         switch ( li->idassert_mode ) {
 812         /* already in u:ID or dn:DN form */
 813         case LDAP_BACK_IDASSERT_OTHERID:
 814         case LDAP_BACK_IDASSERT_OTHERDN:
 815                 ber_dupbv( &ctrls[ 0 ]->ldctl_value, &assertedID );
 816                 break;
 817
 818         /* needs the dn: prefix */
 819         default:
 820                 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
 821                 ctrls[ 0 ]->ldctl_value.bv_val = ch_malloc( ctrls[ 0 ]->ldctl_value.bv_len + 1 );
 822                 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
 823                 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val + STRLENOF( "dn:" ),
 824                                 assertedID.bv_val, assertedID.bv_len + 1 );
 825                 break;
 826         }
 827
 828         if ( op->o_ctrls ) {
 829                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
 830                         ctrls[ i + 1 ] = op->o_ctrls[ i ];
 831                 }
 832         }
 833         ctrls[ i + 1 ] = NULL;
 834
 835 done:;
 836         if ( ctrls == NULL ) {
 837                 ctrls = op->o_ctrls;
 838         }
 839
 840         *pctrls = ctrls;
 841
 842         return rs->sr_err;
 843 }
 844 #endif /* LDAP_BACK_PROXY_AUTHZ */