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 1999-2007 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 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/errno.h>
  29 #include <ac/socket.h>
  30 #include <ac/string.h>
  31
  32 #define AVL_INTERNAL
  33 #include "slap.h"
  34 #include "back-ldap.h"
  35 #undef ldap_debug       /* silence a warning in ldap-int.h */
  36 #include "../../../libraries/libldap/ldap-int.h"
  37
  38 #include "lutil_ldap.h"
  39
  40 #define LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ       "2.16.840.1.113730.3.4.12"
  41
  42 #if LDAP_BACK_PRINT_CONNTREE > 0
  43 static void
  44 ldap_back_ravl_print( Avlnode *root, int depth )
  45 {
  46         int             i;
  47         ldapconn_t      *lc;
  48
  49         if ( root == 0 ) {
  50                 return;
  51         }
  52
  53         ldap_back_ravl_print( root->avl_right, depth+1 );
  54
  55         for ( i = 0; i < depth; i++ ) {
  56                 fprintf( stderr, "-" );
  57         }
  58
  59         lc = root->avl_data;
  60         fprintf( stderr, "lc=%p local=\"%s\" conn=%p %s refcnt=%d flags=0x%08x\n",
  61                 (void *)lc,
  62                 lc->lc_local_ndn.bv_val ? lc->lc_local_ndn.bv_val : "",
  63                 (void *)lc->lc_conn,
  64                 avl_bf2str( root->avl_bf ), lc->lc_refcnt, lc->lc_lcflags );
  65
  66         ldap_back_ravl_print( root->avl_left, depth+1 );
  67 }
  68
  69 static char* priv2str[] = {
  70         "privileged",
  71         "privileged/TLS",
  72         "anonymous",
  73         "anonymous/TLS",
  74         "bind",
  75         "bind/TLS",
  76         NULL
  77 };
  78
  79 void
  80 ldap_back_print_conntree( ldapinfo_t *li, char *msg )
  81 {
  82         int     c;
  83
  84         fprintf( stderr, "========> %s\n", msg );
  85
  86         for ( c = LDAP_BACK_PCONN_FIRST; c < LDAP_BACK_PCONN_LAST; c++ ) {
  87                 int             i = 0;
  88                 ldapconn_t      *lc;
  89
  90                 fprintf( stderr, "  %s[%d]\n", priv2str[ c ], li->li_conn_priv[ c ].lic_num );
  91
  92                 LDAP_TAILQ_FOREACH( lc, &li->li_conn_priv[ c ].lic_priv, lc_q )
  93                 {
  94                         fprintf( stderr, "    [%d] lc=%p local=\"%s\" conn=%p refcnt=%d flags=0x%08x\n",
  95                                 i,
  96                                 (void *)lc,
  97                                 lc->lc_local_ndn.bv_val ? lc->lc_local_ndn.bv_val : "",
  98                                 (void *)lc->lc_conn, lc->lc_refcnt, lc->lc_lcflags );
  99                         i++;
 100                 }
 101         }
 102
 103         if ( li->li_conninfo.lai_tree == 0 ) {
 104                 fprintf( stderr, "\t(empty)\n" );
 105
 106         } else {
 107                 ldap_back_ravl_print( li->li_conninfo.lai_tree, 0 );
 108         }
 109
 110         fprintf( stderr, "<======== %s\n", msg );
 111 }
 112 #endif /* LDAP_BACK_PRINT_CONNTREE */
 113
 114 static int
 115 ldap_back_freeconn( ldapinfo_t *li, ldapconn_t *lc, int dolock );
 116
 117 static ldapconn_t *
 118 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
 119         struct berval *binddn, struct berval *bindcred );
 120
 121 static int
 122 ldap_back_is_proxy_authz( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
 123         struct berval *binddn, struct berval *bindcred );
 124
 125 static int
 126 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs,
 127         ldap_back_send_t sendok, struct berval *binddn, struct berval *bindcred );
 128
 129 static int
 130 ldap_back_prepare_conn( ldapconn_t *lc, Operation *op, SlapReply *rs,
 131         ldap_back_send_t sendok );
 132
 133 static int
 134 ldap_back_conndnlc_cmp( const void *c1, const void *c2 );
 135
 136 ldapconn_t *
 137 ldap_back_conn_delete( ldapinfo_t *li, ldapconn_t *lc )
 138 {
 139         if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) {
 140                 if ( LDAP_BACK_CONN_CACHED( lc ) ) {
 141                         assert( lc->lc_q.tqe_prev != NULL );
 142                         assert( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num > 0 );
 143                         li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num--;
 144                         LDAP_TAILQ_REMOVE( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q );
 145                         LDAP_TAILQ_ENTRY_INIT( lc, lc_q );
 146                         LDAP_BACK_CONN_CACHED_CLEAR( lc );
 147
 148                 } else {
 149                         assert( LDAP_BACK_CONN_TAINTED( lc ) );
 150                         assert( lc->lc_q.tqe_prev == NULL );
 151                 }
 152
 153         } else {
 154                 ldapconn_t      *tmplc = NULL;
 155
 156                 if ( LDAP_BACK_CONN_CACHED( lc ) ) {
 157                         assert( !LDAP_BACK_CONN_TAINTED( lc ) );
 158                         tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 159                                 ldap_back_conndnlc_cmp );
 160                         assert( tmplc == lc );
 161                         LDAP_BACK_CONN_CACHED_CLEAR( lc );
 162                 }
 163
 164                 assert( LDAP_BACK_CONN_TAINTED( lc ) || tmplc == lc );
 165         }
 166
 167         return lc;
 168 }
 169
 170 int
 171 ldap_back_bind( Operation *op, SlapReply *rs )
 172 {
 173         ldapinfo_t              *li = (ldapinfo_t *) op->o_bd->be_private;
 174         ldapconn_t              *lc;
 175
 176         int                     rc = 0;
 177         ber_int_t               msgid;
 178         ldap_back_send_t        retrying = LDAP_BACK_RETRYING;
 179
 180         lc = ldap_back_getconn( op, rs, LDAP_BACK_BIND_SERR, NULL, NULL );
 181         if ( !lc ) {
 182                 return rs->sr_err;
 183         }
 184
 185         /* we can do (almost) whatever we want with this conn,
 186          * because either it's temporary, or it's marked as binding */
 187         if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
 188                 ch_free( lc->lc_bound_ndn.bv_val );
 189                 BER_BVZERO( &lc->lc_bound_ndn );
 190         }
 191         if ( !BER_BVISNULL( &lc->lc_cred ) ) {
 192                 memset( lc->lc_cred.bv_val, 0, lc->lc_cred.bv_len );
 193                 ch_free( lc->lc_cred.bv_val );
 194                 BER_BVZERO( &lc->lc_cred );
 195         }
 196         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 197
 198 retry:;
 199         /* method is always LDAP_AUTH_SIMPLE if we got here */
 200         rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
 201                         LDAP_SASL_SIMPLE,
 202                         &op->orb_cred, op->o_ctrls, NULL, &msgid );
 203         /* FIXME: should we always retry, or only when piping the bind
 204          * in the "override" connection pool? */
 205         rc = ldap_back_op_result( lc, op, rs, msgid,
 206                 li->li_timeout[ SLAP_OP_BIND ],
 207                 LDAP_BACK_BIND_SERR | retrying );
 208         if ( rc == LDAP_UNAVAILABLE && retrying ) {
 209                 retrying &= ~LDAP_BACK_RETRYING;
 210                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_BIND_SERR ) ) {
 211                         goto retry;
 212                 }
 213         }
 214
 215         if ( rc == LDAP_SUCCESS ) {
 216                 /* If defined, proxyAuthz will be used also when
 217                  * back-ldap is the authorizing backend; for this
 218                  * purpose, after a successful bind the connection
 219                  * is left for further binds, and further operations
 220                  * on this client connection will use a default
 221                  * connection with identity assertion */
 222                 /* NOTE: use with care */
 223                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 224                         ldap_back_release_conn( li, lc );
 225                         return( rc );
 226                 }
 227
 228                 /* rebind is now done inside ldap_back_proxy_authz_bind()
 229                  * in case of success */
 230                 LDAP_BACK_CONN_ISBOUND_SET( lc );
 231                 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
 232
 233                 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
 234                         memset( lc->lc_cred.bv_val, 0,
 235                                         lc->lc_cred.bv_len );
 236                 }
 237
 238                 if ( LDAP_BACK_SAVECRED( li ) ) {
 239                         ber_bvreplace( &lc->lc_cred, &op->orb_cred );
 240                         ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
 241
 242                 } else {
 243                         lc->lc_cred.bv_len = 0;
 244                 }
 245         }
 246
 247         /* must re-insert if local DN changed as result of bind */
 248         if ( !LDAP_BACK_CONN_ISBOUND( lc )
 249                 || ( !dn_match( &op->o_req_ndn, &lc->lc_local_ndn )
 250                         && !LDAP_BACK_PCONN_ISPRIV( lc ) ) )
 251         {
 252                 int             lerr = -1;
 253                 ldapconn_t      *tmplc;
 254
 255                 /* wait for all other ops to release the connection */
 256 retry_lock:;
 257                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 258                 if ( lc->lc_refcnt > 1 ) {
 259                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 260                         ldap_pvt_thread_yield();
 261                         goto retry_lock;
 262                 }
 263
 264 #if LDAP_BACK_PRINT_CONNTREE > 0
 265                 ldap_back_print_conntree( li, ">>> ldap_back_bind" );
 266 #endif /* LDAP_BACK_PRINT_CONNTREE */
 267
 268                 assert( lc->lc_refcnt == 1 );
 269                 ldap_back_conn_delete( li, lc );
 270
 271                 /* delete all cached connections with the current connection */
 272                 if ( LDAP_BACK_SINGLECONN( li ) ) {
 273                         while ( ( tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc, ldap_back_conn_cmp ) ) != NULL )
 274                         {
 275                                 Debug( LDAP_DEBUG_TRACE,
 276                                         "=>ldap_back_bind: destroying conn %ld (refcnt=%u)\n",
 277                                         LDAP_BACK_PCONN_ID( lc ), lc->lc_refcnt, 0 );
 278
 279                                 if ( tmplc->lc_refcnt != 0 ) {
 280                                         /* taint it */
 281                                         LDAP_BACK_CONN_TAINTED_SET( tmplc );
 282                                         LDAP_BACK_CONN_CACHED_CLEAR( tmplc );
 283
 284                                 } else {
 285                                         /*
 286                                          * Needs a test because the handler may be corrupted,
 287                                          * and calling ldap_unbind on a corrupted header results
 288                                          * in a segmentation fault
 289                                          */
 290                                         ldap_back_conn_free( tmplc );
 291                                 }
 292                         }
 293                 }
 294
 295                 if ( LDAP_BACK_CONN_ISBOUND( lc ) ) {
 296                         ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
 297                         if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 298                                 LDAP_BACK_PCONN_ROOTDN_SET( lc, op );
 299                         }
 300                         lerr = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
 301                                 ldap_back_conndn_cmp, ldap_back_conndn_dup );
 302                 }
 303
 304 #if LDAP_BACK_PRINT_CONNTREE > 0
 305                 ldap_back_print_conntree( li, "<<< ldap_back_bind" );
 306 #endif /* LDAP_BACK_PRINT_CONNTREE */
 307
 308                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 309                 switch ( lerr ) {
 310                 case 0:
 311                         LDAP_BACK_CONN_CACHED_SET( lc );
 312                         break;
 313
 314                 case -1:
 315                         /* duplicate; someone else successfully bound
 316                          * on the same connection with the same identity;
 317                          * we can do this because lc_refcnt == 1 */
 318                         ldap_back_conn_free( lc );
 319                         lc = NULL;
 320                 }
 321         }
 322
 323         if ( lc != NULL ) {
 324                 ldap_back_release_conn( li, lc );
 325         }
 326
 327         return( rc );
 328 }
 329
 330 /*
 331  * ldap_back_conndn_cmp
 332  *
 333  * compares two ldapconn_t based on the value of the conn pointer
 334  * and of the local DN; used by avl stuff for insert, lookup
 335  * and direct delete
 336  */
 337 int
 338 ldap_back_conndn_cmp( const void *c1, const void *c2 )
 339 {
 340         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 341         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 342         int rc;
 343
 344         /* If local DNs don't match, it is definitely not a match */
 345         /* For shared sessions, conn is NULL. Only explicitly
 346          * bound sessions will have non-NULL conn.
 347          */
 348         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 349         if ( rc == 0 ) {
 350                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 351         }
 352
 353         return rc;
 354 }
 355
 356 /*
 357  * ldap_back_conndnlc_cmp
 358  *
 359  * compares two ldapconn_t based on the value of the conn pointer,
 360  * the local DN and the lc pointer; used by avl stuff for insert, lookup
 361  * and direct delete
 362  */
 363 static int
 364 ldap_back_conndnlc_cmp( const void *c1, const void *c2 )
 365 {
 366         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 367         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 368         int rc;
 369
 370         /* If local DNs don't match, it is definitely not a match */
 371         /* For shared sessions, conn is NULL. Only explicitly
 372          * bound sessions will have non-NULL conn.
 373          */
 374         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 375         if ( rc == 0 ) {
 376                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 377                 if ( rc == 0 ) {
 378                         rc = SLAP_PTRCMP( lc1, lc2 );
 379                 }
 380         }
 381
 382         return rc;
 383 }
 384
 385 /*
 386  * ldap_back_conn_cmp
 387  *
 388  * compares two ldapconn_t based on the value of the conn pointer;
 389  * used by avl stuff for delete of all conns with the same connid
 390  */
 391 int
 392 ldap_back_conn_cmp( const void *c1, const void *c2 )
 393 {
 394         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 395         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 396
 397         /* For shared sessions, conn is NULL. Only explicitly
 398          * bound sessions will have non-NULL conn.
 399          */
 400         return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 401 }
 402
 403 /*
 404  * ldap_back_conndn_dup
 405  *
 406  * returns -1 in case a duplicate ldapconn_t has been inserted;
 407  * used by avl stuff
 408  */
 409 int
 410 ldap_back_conndn_dup( void *c1, void *c2 )
 411 {
 412         ldapconn_t      *lc1 = (ldapconn_t *)c1;
 413         ldapconn_t      *lc2 = (ldapconn_t *)c2;
 414
 415         /* Cannot have more than one shared session with same DN */
 416         if ( lc1->lc_conn == lc2->lc_conn &&
 417                 dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) )
 418         {
 419                 return -1;
 420         }
 421
 422         return 0;
 423 }
 424
 425 static int
 426 ldap_back_freeconn( ldapinfo_t *li, ldapconn_t *lc, int dolock )
 427 {
 428         if ( dolock ) {
 429                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 430         }
 431
 432 #if LDAP_BACK_PRINT_CONNTREE > 0
 433         ldap_back_print_conntree( li, ">>> ldap_back_freeconn" );
 434 #endif /* LDAP_BACK_PRINT_CONNTREE */
 435
 436         (void)ldap_back_conn_delete( li, lc );
 437
 438         if ( lc->lc_refcnt == 0 ) {
 439                 ldap_back_conn_free( (void *)lc );
 440         }
 441
 442 #if LDAP_BACK_PRINT_CONNTREE > 0
 443         ldap_back_print_conntree( li, "<<< ldap_back_freeconn" );
 444 #endif /* LDAP_BACK_PRINT_CONNTREE */
 445
 446         if ( dolock ) {
 447                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 448         }
 449
 450         return 0;
 451 }
 452
 453 #ifdef HAVE_TLS
 454 static int
 455 ldap_back_start_tls(
 456         LDAP            *ld,
 457         int             protocol,
 458         int             *is_tls,
 459         const char      *url,
 460         unsigned        flags,
 461         int             retries,
 462         const char      **text )
 463 {
 464         int             rc = LDAP_SUCCESS;
 465
 466         /* start TLS ("tls-[try-]{start,propagate}" statements) */
 467         if ( ( LDAP_BACK_USE_TLS_F( flags ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS_F( flags ) ) )
 468                                 && !ldap_is_ldaps_url( url ) )
 469         {
 470 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
 471                 /*
 472                  * use asynchronous StartTLS
 473                  * in case, chase referral (not implemented yet)
 474                  */
 475                 int             msgid;
 476
 477                 if ( protocol == 0 ) {
 478                         ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
 479                                         (void *)&protocol );
 480                 }
 481
 482                 if ( protocol < LDAP_VERSION3 ) {
 483                         /* we should rather bail out... */
 484                         rc = LDAP_UNWILLING_TO_PERFORM;
 485                         *text = "invalid protocol version";
 486                 }
 487
 488                 if ( rc == LDAP_SUCCESS ) {
 489                         rc = ldap_start_tls( ld, NULL, NULL, &msgid );
 490                 }
 491
 492                 if ( rc == LDAP_SUCCESS ) {
 493                         LDAPMessage     *res = NULL;
 494                         struct timeval  tv;
 495
 496                         LDAP_BACK_TV_SET( &tv );
 497
 498 retry:;
 499                         rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
 500                         if ( rc < 0 ) {
 501                                 rc = LDAP_UNAVAILABLE;
 502
 503                         } else if ( rc == 0 ) {
 504                                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
 505                                         ldap_pvt_thread_yield();
 506                                         if ( retries > 0 ) {
 507                                                 retries--;
 508                                         }
 509                                         LDAP_BACK_TV_SET( &tv );
 510                                         goto retry;
 511                                 }
 512                                 rc = LDAP_UNAVAILABLE;
 513
 514                         } else if ( rc == LDAP_RES_EXTENDED ) {
 515                                 struct berval   *data = NULL;
 516
 517                                 rc = ldap_parse_extended_result( ld, res,
 518                                                 NULL, &data, 0 );
 519                                 if ( rc == LDAP_SUCCESS ) {
 520                                         int err;
 521                                         rc = ldap_parse_result( ld, res, &err,
 522                                                 NULL, NULL, NULL, NULL, 1 );
 523                                         if ( rc == LDAP_SUCCESS ) {
 524                                                 rc = err;
 525                                         }
 526                                         res = NULL;
 527
 528                                         /* FIXME: in case a referral
 529                                          * is returned, should we try
 530                                          * using it instead of the
 531                                          * configured URI? */
 532                                         if ( rc == LDAP_SUCCESS ) {
 533                                                 rc = ldap_install_tls( ld );
 534
 535                                         } else if ( rc == LDAP_REFERRAL ) {
 536                                                 rc = LDAP_UNWILLING_TO_PERFORM;
 537                                                 *text = "unwilling to chase referral returned by Start TLS exop";
 538                                         }
 539
 540                                         if ( data ) {
 541                                                 if ( data->bv_val ) {
 542                                                         ber_memfree( data->bv_val );
 543                                                 }
 544                                                 ber_memfree( data );
 545                                         }
 546                                 }
 547
 548                         } else {
 549                                 rc = LDAP_OTHER;
 550                         }
 551
 552                         if ( res != NULL ) {
 553                                 ldap_msgfree( res );
 554                         }
 555                 }
 556 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 557                 /*
 558                  * use synchronous StartTLS
 559                  */
 560                 rc = ldap_start_tls_s( ld, NULL, NULL );
 561 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 562
 563                 /* if StartTLS is requested, only attempt it if the URL
 564                  * is not "ldaps://"; this may occur not only in case
 565                  * of misconfiguration, but also when used in the chain
 566                  * overlay, where the "uri" can be parsed out of a referral */
 567                 switch ( rc ) {
 568                 case LDAP_SUCCESS:
 569                         *is_tls = 1;
 570                         break;
 571
 572                 case LDAP_SERVER_DOWN:
 573                         break;
 574
 575                 default:
 576                         if ( LDAP_BACK_TLS_CRITICAL_F( flags ) ) {
 577                                 *text = "could not start TLS";
 578                                 break;
 579                         }
 580
 581                         /* in case Start TLS is not critical */
 582                         *is_tls = 0;
 583                         rc = LDAP_SUCCESS;
 584                         break;
 585                 }
 586
 587         } else {
 588                 *is_tls = 0;
 589         }
 590
 591         return rc;
 592 }
 593 #endif /* HAVE_TLS */
 594
 595 static int
 596 ldap_back_prepare_conn( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
 597 {
 598         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 599         int             version;
 600         LDAP            *ld = NULL;
 601 #ifdef HAVE_TLS
 602         int             is_tls = op->o_conn->c_is_tls;
 603         time_t          lc_time = (time_t)(-1);
 604         slap_bindconf *sb;
 605 #endif /* HAVE_TLS */
 606
 607         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 608         rs->sr_err = ldap_initialize( &ld, li->li_uri );
 609         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 610         if ( rs->sr_err != LDAP_SUCCESS ) {
 611                 goto error_return;
 612         }
 613
 614         if ( li->li_urllist_f ) {
 615                 ldap_set_urllist_proc( ld, li->li_urllist_f, li->li_urllist_p );
 616         }
 617
 618         /* Set LDAP version. This will always succeed: If the client
 619          * bound with a particular version, then so can we.
 620          */
 621         if ( li->li_version != 0 ) {
 622                 version = li->li_version;
 623
 624         } else if ( op->o_protocol != 0 ) {
 625                 version = op->o_protocol;
 626
 627         } else {
 628                 /* assume it's an internal op; set to LDAPv3 */
 629                 version = LDAP_VERSION3;
 630         }
 631         ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&version );
 632
 633         /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
 634         ldap_set_option( ld, LDAP_OPT_REFERRALS,
 635                 LDAP_BACK_CHASE_REFERRALS( li ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
 636
 637         if ( li->li_network_timeout > 0 ) {
 638                 struct timeval          tv;
 639
 640                 tv.tv_sec = li->li_network_timeout;
 641                 tv.tv_usec = 0;
 642                 ldap_set_option( ld, LDAP_OPT_NETWORK_TIMEOUT, (const void *)&tv );
 643         }
 644
 645 #ifdef HAVE_TLS
 646         if ( LDAP_BACK_CONN_ISPRIV( lc ) ) {
 647                 sb = &li->li_acl;
 648
 649         } else if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) {
 650                 sb = &li->li_idassert.si_bc;
 651
 652         } else {
 653                 sb = &li->li_tls;
 654         }
 655
 656         if ( sb->sb_tls_do_init ) {
 657                 bindconf_tls_set( sb, ld );
 658         } else if ( sb->sb_tls_ctx ) {
 659                 ldap_set_option( ld, LDAP_OPT_X_TLS_CTX, sb->sb_tls_ctx );
 660         }
 661
 662         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 663         rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls,
 664                         li->li_uri, li->li_flags, li->li_nretries, &rs->sr_text );
 665         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 666         if ( rs->sr_err != LDAP_SUCCESS ) {
 667                 ldap_unbind_ext( ld, NULL, NULL );
 668                 goto error_return;
 669
 670         } else if ( li->li_idle_timeout ) {
 671                 /* only touch when activity actually took place... */
 672                 lc_time = op->o_time;
 673         }
 674 #endif /* HAVE_TLS */
 675
 676         lc->lc_ld = ld;
 677         lc->lc_refcnt = 1;
 678 #ifdef HAVE_TLS
 679         if ( is_tls ) {
 680                 LDAP_BACK_CONN_ISTLS_SET( lc );
 681         } else {
 682                 LDAP_BACK_CONN_ISTLS_CLEAR( lc );
 683         }
 684         if ( lc_time != (time_t)(-1) ) {
 685                 lc->lc_time = lc_time;
 686         }
 687 #endif /* HAVE_TLS */
 688
 689 error_return:;
 690         if ( rs->sr_err != LDAP_SUCCESS ) {
 691                 rs->sr_err = slap_map_api2result( rs );
 692                 if ( sendok & LDAP_BACK_SENDERR ) {
 693                         if ( rs->sr_text == NULL ) {
 694                                 rs->sr_text = "ldap_initialize() failed";
 695                         }
 696                         send_ldap_result( op, rs );
 697                         rs->sr_text = NULL;
 698                 }
 699
 700         } else {
 701                 if ( li->li_conn_ttl > 0 ) {
 702                         lc->lc_create_time = op->o_time;
 703                 }
 704         }
 705
 706         return rs->sr_err;
 707 }
 708
 709 static ldapconn_t *
 710 ldap_back_getconn(
 711         Operation               *op,
 712         SlapReply               *rs,
 713         ldap_back_send_t        sendok,
 714         struct berval           *binddn,
 715         struct berval           *bindcred )
 716 {
 717         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 718         ldapconn_t      *lc = NULL,
 719                         lc_curr = { 0 };
 720         int             refcnt = 1,
 721                         lookupconn = !( sendok & LDAP_BACK_BINDING );
 722
 723         /* if the server is quarantined, and
 724          * - the current interval did not expire yet, or
 725          * - no more retries should occur,
 726          * don't return the connection */
 727         if ( li->li_isquarantined ) {
 728                 slap_retry_info_t       *ri = &li->li_quarantine;
 729                 int                     dont_retry = 1;
 730
 731                 if ( li->li_quarantine.ri_interval ) {
 732                         ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex );
 733                         if ( li->li_isquarantined == LDAP_BACK_FQ_YES ) {
 734                                 dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL
 735                                         || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] );
 736                                 if ( !dont_retry ) {
 737                                         Debug( LDAP_DEBUG_ANY,
 738                                                 "%s: ldap_back_getconn quarantine "
 739                                                 "retry block #%d try #%d.\n",
 740                                                 op->o_log_prefix, ri->ri_idx, ri->ri_count );
 741                                         li->li_isquarantined = LDAP_BACK_FQ_RETRYING;
 742                                 }
 743                         }
 744                         ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex );
 745                 }
 746
 747                 if ( dont_retry ) {
 748                         rs->sr_err = LDAP_UNAVAILABLE;
 749                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
 750                                 send_ldap_result( op, rs );
 751                         }
 752                         return NULL;
 753                 }
 754         }
 755
 756         /* Internal searches are privileged and shared. So is root. */
 757         if ( op->o_do_not_cache || be_isroot( op ) ) {
 758                 LDAP_BACK_CONN_ISPRIV_SET( &lc_curr );
 759                 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
 760                 LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op );
 761
 762         } else {
 763                 struct berval   tmpbinddn,
 764                                 tmpbindcred,
 765                                 save_o_dn,
 766                                 save_o_ndn;
 767                 int             isproxyauthz;
 768
 769                 /* need cleanup */
 770                 if ( binddn == NULL ) {
 771                         binddn = &tmpbinddn;
 772                 }
 773                 if ( bindcred == NULL ) {
 774                         bindcred = &tmpbindcred;
 775                 }
 776                 if ( op->o_tag == LDAP_REQ_BIND ) {
 777                         save_o_dn = op->o_dn;
 778                         save_o_ndn = op->o_ndn;
 779                         op->o_dn = op->o_req_dn;
 780                         op->o_ndn = op->o_req_ndn;
 781                 }
 782                 isproxyauthz = ldap_back_is_proxy_authz( op, rs, sendok, binddn, bindcred );
 783                 if ( isproxyauthz == -1 ) {
 784                         return NULL;
 785                 }
 786                 if ( op->o_tag == LDAP_REQ_BIND ) {
 787                         op->o_dn = save_o_dn;
 788                         op->o_ndn = save_o_ndn;
 789                 }
 790
 791                 lc_curr.lc_local_ndn = op->o_ndn;
 792                 /* Explicit binds must not be shared;
 793                  * however, explicit binds are piped in a special connection
 794                  * when idassert is to occur with "override" set */
 795                 if ( op->o_tag == LDAP_REQ_BIND && !isproxyauthz ) {
 796                         lc_curr.lc_conn = op->o_conn;
 797
 798                 } else {
 799                         if ( isproxyauthz && !( sendok & LDAP_BACK_BINDING ) ) {
 800                                 lc_curr.lc_local_ndn = *binddn;
 801                                 LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op );
 802                                 LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr );
 803
 804                         } else if ( isproxyauthz && ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) {
 805                                 lc_curr.lc_local_ndn = slap_empty_bv;
 806                                 LDAP_BACK_PCONN_BIND_SET( &lc_curr, op );
 807                                 LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr );
 808                                 lookupconn = 1;
 809
 810                         } else if ( SLAP_IS_AUTHZ_BACKEND( op ) ) {
 811                                 lc_curr.lc_conn = op->o_conn;
 812
 813                         } else {
 814                                 LDAP_BACK_PCONN_ANON_SET( &lc_curr, op );
 815                         }
 816                 }
 817         }
 818
 819         /* Explicit Bind requests always get their own conn */
 820         if ( lookupconn ) {
 821 retry_lock:
 822                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 823                 if ( LDAP_BACK_PCONN_ISPRIV( &lc_curr ) ) {
 824                         /* lookup a conn that's not binding */
 825                         LDAP_TAILQ_FOREACH( lc,
 826                                 &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv,
 827                                 lc_q )
 828                         {
 829                                 if ( !LDAP_BACK_CONN_BINDING( lc ) && lc->lc_refcnt == 0 ) {
 830                                         break;
 831                                 }
 832                         }
 833
 834                         if ( lc != NULL ) {
 835                                 if ( lc != LDAP_TAILQ_LAST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 836                                         ldapconn_t, lc_q ) )
 837                                 {
 838                                         LDAP_TAILQ_REMOVE( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 839                                                 lc, lc_q );
 840                                         LDAP_TAILQ_ENTRY_INIT( lc, lc_q );
 841                                         LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 842                                                 lc, lc_q );
 843                                 }
 844
 845                         } else if ( !LDAP_BACK_USE_TEMPORARIES( li )
 846                                 && li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_num == li->li_conn_priv_max )
 847                         {
 848                                 lc = LDAP_TAILQ_FIRST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv );
 849                         }
 850
 851                 } else {
 852
 853                         /* Searches for a ldapconn in the avl tree */
 854                         lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
 855                                         (caddr_t)&lc_curr, ldap_back_conndn_cmp );
 856                 }
 857
 858                 if ( lc != NULL ) {
 859                         /* Don't reuse connections while they're still binding */
 860                         if ( LDAP_BACK_CONN_BINDING( lc ) ) {
 861                                 if ( !LDAP_BACK_USE_TEMPORARIES( li ) ) {
 862                                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 863
 864                                         ldap_pvt_thread_yield();
 865                                         goto retry_lock;
 866                                 }
 867                                 lc = NULL;
 868                         }
 869
 870                         if ( lc != NULL ) {
 871                                 if ( op->o_tag == LDAP_REQ_BIND ) {
 872                                         /* right now, this is the only possible case */
 873                                         assert( ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) );
 874                                         LDAP_BACK_CONN_BINDING_SET( lc );
 875                                 }
 876
 877                                 refcnt = ++lc->lc_refcnt;
 878                         }
 879                 }
 880                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 881         }
 882
 883         /* Looks like we didn't get a bind. Open a new session... */
 884         if ( lc == NULL ) {
 885                 lc = (ldapconn_t *)ch_calloc( 1, sizeof( ldapconn_t ) );
 886                 lc->lc_flags = li->li_flags;
 887                 lc->lc_lcflags = lc_curr.lc_lcflags;
 888                 if ( ldap_back_prepare_conn( lc, op, rs, sendok ) != LDAP_SUCCESS ) {
 889                         ch_free( lc );
 890                         return NULL;
 891                 }
 892
 893                 if ( sendok & LDAP_BACK_BINDING ) {
 894                         LDAP_BACK_CONN_BINDING_SET( lc );
 895                 }
 896
 897                 lc->lc_conn = lc_curr.lc_conn;
 898                 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
 899
 900                 /*
 901                  * the rationale is: connections as the rootdn are privileged,
 902                  * so acl_authcDN is to be used; however, in some cases
 903                  * one already configured identity assertion with a highly
 904                  * privileged idassert_authcDN, so if acl_authcDN is NULL
 905                  * and idassert_authcDN is not, use the second instead.
 906                  *
 907                  * might change in the future, because it's preferable
 908                  * to make clear what identity is being used, since
 909                  * the only drawback is that one risks to configure
 910                  * the same identity twice...
 911                  */
 912                 if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
 913                         if ( BER_BVISNULL( &li->li_acl_authcDN ) && !BER_BVISNULL( &li->li_idassert_authcDN ) ) {
 914                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN );
 915                                 ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd );
 916
 917                         } else {
 918                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN );
 919                                 ber_dupbv( &lc->lc_cred, &li->li_acl_passwd );
 920                         }
 921                         LDAP_BACK_CONN_ISPRIV_SET( lc );
 922
 923                 } else if ( LDAP_BACK_CONN_ISIDASSERT( &lc_curr ) ) {
 924                         if ( !LDAP_BACK_PCONN_ISBIND( &lc_curr ) ) {
 925                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN );
 926                                 ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd );
 927                         }
 928                         LDAP_BACK_CONN_ISIDASSERT_SET( lc );
 929
 930                 } else {
 931                         BER_BVZERO( &lc->lc_cred );
 932                         BER_BVZERO( &lc->lc_bound_ndn );
 933                         if ( !BER_BVISEMPTY( &op->o_ndn )
 934                                 && SLAP_IS_AUTHZ_BACKEND( op ) )
 935                         {
 936                                 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
 937                         }
 938                 }
 939
 940 #ifdef HAVE_TLS
 941                 /* if start TLS failed but it was not mandatory,
 942                  * check if the non-TLS connection was already
 943                  * in cache; in case, destroy the newly created
 944                  * connection and use the existing one */
 945                 if ( LDAP_BACK_PCONN_ISTLS( lc )
 946                                 && !ldap_tls_inplace( lc->lc_ld ) )
 947                 {
 948                         ldapconn_t      *tmplc = NULL;
 949                         int             idx = LDAP_BACK_CONN2PRIV( &lc_curr ) - 1;
 950
 951                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 952                         LDAP_TAILQ_FOREACH( tmplc,
 953                                 &li->li_conn_priv[ idx ].lic_priv,
 954                                 lc_q )
 955                         {
 956                                 if ( !LDAP_BACK_CONN_BINDING( tmplc ) ) {
 957                                         break;
 958                                 }
 959                         }
 960
 961                         if ( tmplc != NULL ) {
 962                                 refcnt = ++tmplc->lc_refcnt;
 963                                 ldap_back_conn_free( lc );
 964                                 lc = tmplc;
 965                         }
 966                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 967
 968                         if ( tmplc != NULL ) {
 969                                 goto done;
 970                         }
 971                 }
 972 #endif /* HAVE_TLS */
 973
 974                 /* Inserts the newly created ldapconn in the avl tree */
 975                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 976
 977                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 978
 979                 assert( lc->lc_refcnt == 1 );
 980
 981 #if LDAP_BACK_PRINT_CONNTREE > 0
 982                 ldap_back_print_conntree( li, ">>> ldap_back_getconn(insert)" );
 983 #endif /* LDAP_BACK_PRINT_CONNTREE */
 984
 985                 if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) {
 986                         if ( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num < li->li_conn_priv_max ) {
 987                                 LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q );
 988                                 li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num++;
 989                                 LDAP_BACK_CONN_CACHED_SET( lc );
 990
 991                         } else {
 992                                 LDAP_BACK_CONN_TAINTED_SET( lc );
 993                         }
 994                         rs->sr_err = 0;
 995
 996                 } else {
 997                         rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
 998                                 ldap_back_conndn_cmp, ldap_back_conndn_dup );
 999                         LDAP_BACK_CONN_CACHED_SET( lc );
1000                 }
1001
1002 #if LDAP_BACK_PRINT_CONNTREE > 0
1003                 ldap_back_print_conntree( li, "<<< ldap_back_getconn(insert)" );
1004 #endif /* LDAP_BACK_PRINT_CONNTREE */
1005
1006                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1007
1008                 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1009                         char    buf[ SLAP_TEXT_BUFLEN ];
1010
1011                         snprintf( buf, sizeof( buf ),
1012                                 "lc=%p inserted refcnt=%u rc=%d",
1013                                 (void *)lc, refcnt, rs->sr_err );
1014
1015                         Debug( LDAP_DEBUG_TRACE,
1016                                 "=>ldap_back_getconn: %s: %s\n",
1017                                 op->o_log_prefix, buf, 0 );
1018                 }
1019
1020                 if ( !LDAP_BACK_PCONN_ISPRIV( lc ) ) {
1021                         /* Err could be -1 in case a duplicate ldapconn is inserted */
1022                         switch ( rs->sr_err ) {
1023                         case 0:
1024                                 break;
1025
1026                         case -1:
1027                                 LDAP_BACK_CONN_CACHED_CLEAR( lc );
1028                                 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( li ) ) {
1029                                         /* duplicate: free and try to get the newly created one */
1030                                         ldap_back_conn_free( lc );
1031                                         lc = NULL;
1032                                         goto retry_lock;
1033                                 }
1034
1035                                 /* taint connection, so that it'll be freed when released */
1036                                 LDAP_BACK_CONN_TAINTED_SET( lc );
1037                                 break;
1038
1039                         default:
1040                                 LDAP_BACK_CONN_CACHED_CLEAR( lc );
1041                                 ldap_back_conn_free( lc );
1042                                 rs->sr_err = LDAP_OTHER;
1043                                 rs->sr_text = "proxy bind collision";
1044                                 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1045                                         send_ldap_result( op, rs );
1046                                         rs->sr_text = NULL;
1047                                 }
1048                                 return NULL;
1049                         }
1050                 }
1051
1052         } else {
1053                 int     expiring = 0;
1054
1055                 if ( ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout )
1056                         || ( li->li_conn_ttl != 0 && op->o_time > lc->lc_create_time + li->li_conn_ttl ) )
1057                 {
1058                         expiring = 1;
1059
1060                         /* let it be used, but taint/delete it so that
1061                          * no-one else can look it up any further */
1062                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1063
1064 #if LDAP_BACK_PRINT_CONNTREE > 0
1065                         ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" );
1066 #endif /* LDAP_BACK_PRINT_CONNTREE */
1067
1068                         (void)ldap_back_conn_delete( li, lc );
1069                         LDAP_BACK_CONN_TAINTED_SET( lc );
1070
1071 #if LDAP_BACK_PRINT_CONNTREE > 0
1072                         ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" );
1073 #endif /* LDAP_BACK_PRINT_CONNTREE */
1074
1075                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1076                 }
1077
1078                 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1079                         char    buf[ SLAP_TEXT_BUFLEN ];
1080
1081                         snprintf( buf, sizeof( buf ),
1082                                 "conn %p fetched refcnt=%u%s",
1083                                 (void *)lc, refcnt, expiring ? " expiring" : "" );
1084                         Debug( LDAP_DEBUG_TRACE,
1085                                 "=>ldap_back_getconn: %s.\n", buf, 0, 0 );
1086                 }
1087         }
1088
1089 #ifdef HAVE_TLS
1090 done:;
1091 #endif /* HAVE_TLS */
1092
1093         return lc;
1094 }
1095
1096 void
1097 ldap_back_release_conn_lock(
1098         ldapinfo_t              *li,
1099         ldapconn_t              **lcp,
1100         int                     dolock )
1101 {
1102
1103         ldapconn_t      *lc = *lcp;
1104
1105         if ( dolock ) {
1106                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1107         }
1108         assert( lc->lc_refcnt > 0 );
1109         LDAP_BACK_CONN_BINDING_CLEAR( lc );
1110         lc->lc_refcnt--;
1111         if ( LDAP_BACK_CONN_TAINTED( lc ) ) {
1112                 ldap_back_freeconn( li, lc, 0 );
1113                 *lcp = NULL;
1114         }
1115         if ( dolock ) {
1116                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1117         }
1118 }
1119
1120 void
1121 ldap_back_quarantine(
1122         Operation       *op,
1123         SlapReply       *rs )
1124 {
1125         ldapinfo_t              *li = (ldapinfo_t *)op->o_bd->be_private;
1126
1127         slap_retry_info_t       *ri = &li->li_quarantine;
1128
1129         ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex );
1130
1131         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1132                 time_t          new_last = slap_get_time();
1133
1134                 switch ( li->li_isquarantined ) {
1135                 case LDAP_BACK_FQ_NO:
1136                         if ( ri->ri_last == new_last ) {
1137                                 goto done;
1138                         }
1139
1140                         Debug( LDAP_DEBUG_ANY,
1141                                 "%s: ldap_back_quarantine enter.\n",
1142                                 op->o_log_prefix, 0, 0 );
1143
1144                         ri->ri_idx = 0;
1145                         ri->ri_count = 0;
1146                         break;
1147
1148                 case LDAP_BACK_FQ_RETRYING:
1149                         Debug( LDAP_DEBUG_ANY,
1150                                 "%s: ldap_back_quarantine block #%d try #%d failed.\n",
1151                                 op->o_log_prefix, ri->ri_idx, ri->ri_count );
1152
1153                         ++ri->ri_count;
1154                         if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1155                                 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1156                         {
1157                                 ri->ri_count = 0;
1158                                 ++ri->ri_idx;
1159                         }
1160                         break;
1161
1162                 default:
1163                         break;
1164                 }
1165
1166                 li->li_isquarantined = LDAP_BACK_FQ_YES;
1167                 ri->ri_last = new_last;
1168
1169         } else if ( li->li_isquarantined != LDAP_BACK_FQ_NO ) {
1170                 if ( ri->ri_last == slap_get_time() ) {
1171                         goto done;
1172                 }
1173
1174                 Debug( LDAP_DEBUG_ANY,
1175                         "%s: ldap_back_quarantine exit (%d) err=%d.\n",
1176                         op->o_log_prefix, li->li_isquarantined, rs->sr_err );
1177
1178                 if ( li->li_quarantine_f ) {
1179                         (void)li->li_quarantine_f( li, li->li_quarantine_p );
1180                 }
1181
1182                 ri->ri_count = 0;
1183                 ri->ri_idx = 0;
1184                 li->li_isquarantined = LDAP_BACK_FQ_NO;
1185         }
1186
1187 done:;
1188         ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex );
1189 }
1190
1191 /*
1192  * ldap_back_dobind_int
1193  *
1194  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
1195  */
1196 static int
1197 ldap_back_dobind_int(
1198         ldapconn_t              **lcp,
1199         Operation               *op,
1200         SlapReply               *rs,
1201         ldap_back_send_t        sendok,
1202         int                     retries,
1203         int                     dolock )
1204 {
1205         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1206
1207         ldapconn_t      *lc;
1208         struct berval   binddn = slap_empty_bv,
1209                         bindcred = slap_empty_bv;
1210
1211         int             rc = 0,
1212                         isbound,
1213                         binding = 0;
1214         ber_int_t       msgid;
1215
1216         assert( lcp != NULL );
1217         assert( retries >= 0 );
1218
1219         if ( sendok & LDAP_BACK_GETCONN ) {
1220                 assert( *lcp == NULL );
1221
1222                 lc = ldap_back_getconn( op, rs, sendok, &binddn, &bindcred );
1223                 if ( lc == NULL ) {
1224                         return 0;
1225                 }
1226                 *lcp = lc;
1227
1228         } else {
1229                 lc = *lcp;
1230         }
1231
1232         assert( lc != NULL );
1233
1234 retry_lock:;
1235         if ( dolock ) {
1236                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1237         }
1238
1239         if ( binding == 0 ) {
1240                 /* check if already bound */
1241                 rc = isbound = LDAP_BACK_CONN_ISBOUND( lc );
1242                 if ( isbound ) {
1243                         if ( dolock ) {
1244                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1245                         }
1246                         return rc;
1247                 }
1248
1249                 if ( LDAP_BACK_CONN_BINDING( lc ) ) {
1250                         /* if someone else is about to bind it, give up and retry */
1251                         if ( dolock ) {
1252                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1253                         }
1254                         ldap_pvt_thread_yield();
1255                         goto retry_lock;
1256
1257                 } else {
1258                         /* otherwise this thread will bind it */
1259                         LDAP_BACK_CONN_BINDING_SET( lc );
1260                         binding = 1;
1261                 }
1262         }
1263
1264         if ( dolock ) {
1265                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1266         }
1267
1268         /*
1269          * FIXME: we need to let clients use proxyAuthz
1270          * otherwise we cannot do symmetric pools of servers;
1271          * we have to live with the fact that a user can
1272          * authorize itself as any ID that is allowed
1273          * by the authzTo directive of the "proxyauthzdn".
1274          */
1275         /*
1276          * NOTE: current Proxy Authorization specification
1277          * and implementation do not allow proxy authorization
1278          * control to be provided with Bind requests
1279          */
1280         /*
1281          * if no bind took place yet, but the connection is bound
1282          * and the "idassert-authcDN" (or other ID) is set,
1283          * then bind as the asserting identity and explicitly
1284          * add the proxyAuthz control to every operation with the
1285          * dn bound to the connection as control value.
1286          * This is done also if this is the authrizing backend,
1287          * but the "override" flag is given to idassert.
1288          * It allows to use SASL bind and yet proxyAuthz users
1289          */
1290         if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) {
1291                 if ( BER_BVISEMPTY( &binddn ) && BER_BVISEMPTY( &bindcred ) ) {
1292                         /* if we got here, it shouldn't return result */
1293                         rc = ldap_back_is_proxy_authz( op, rs,
1294                                 LDAP_BACK_DONTSEND, &binddn, &bindcred );
1295                         assert( rc == 1 );
1296                 }
1297                 rc = ldap_back_proxy_authz_bind( lc, op, rs, sendok, &binddn, &bindcred );
1298                 goto done;
1299         }
1300
1301 #ifdef HAVE_CYRUS_SASL
1302         if ( LDAP_BACK_CONN_ISPRIV( lc )
1303                 && li->li_acl_authmethod == LDAP_AUTH_SASL )
1304         {
1305                 void            *defaults = NULL;
1306
1307                 if ( li->li_acl_secprops != NULL ) {
1308                         rc = ldap_set_option( lc->lc_ld,
1309                                 LDAP_OPT_X_SASL_SECPROPS, li->li_acl_secprops );
1310
1311                         if ( rc != LDAP_OPT_SUCCESS ) {
1312                                 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
1313                                         "(SECPROPS,\"%s\") failed!\n",
1314                                         li->li_acl_secprops, 0, 0 );
1315                                 goto done;
1316                         }
1317                 }
1318
1319                 defaults = lutil_sasl_defaults( lc->lc_ld,
1320                                 li->li_acl_sasl_mech.bv_val,
1321                                 li->li_acl_sasl_realm.bv_val,
1322                                 li->li_acl_authcID.bv_val,
1323                                 li->li_acl_passwd.bv_val,
1324                                 NULL );
1325
1326                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
1327                                 li->li_acl_authcDN.bv_val,
1328                                 li->li_acl_sasl_mech.bv_val, NULL, NULL,
1329                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1330                                 defaults );
1331
1332                 lutil_sasl_freedefs( defaults );
1333
1334                 rs->sr_err = slap_map_api2result( rs );
1335                 if ( rs->sr_err != LDAP_SUCCESS ) {
1336                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1337                         if ( sendok & LDAP_BACK_SENDERR ) {
1338                                 send_ldap_result( op, rs );
1339                         }
1340
1341                 } else {
1342                         LDAP_BACK_CONN_ISBOUND_SET( lc );
1343                 }
1344
1345                 if ( LDAP_BACK_QUARANTINE( li ) ) {
1346                         ldap_back_quarantine( op, rs );
1347                 }
1348
1349                 goto done;
1350         }
1351 #endif /* HAVE_CYRUS_SASL */
1352
1353 retry:;
1354         rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1355                         BER_BVISNULL( &lc->lc_cred ) ? "" : lc->lc_bound_ndn.bv_val,
1356                         LDAP_SASL_SIMPLE, &lc->lc_cred,
1357                         NULL, NULL, &msgid );
1358
1359         if ( rs->sr_err == LDAP_SERVER_DOWN ) {
1360                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
1361                         if ( dolock ) {
1362                                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1363                         }
1364
1365                         assert( lc->lc_refcnt > 0 );
1366                         if ( lc->lc_refcnt == 1 ) {
1367                                 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
1368                                 lc->lc_ld = NULL;
1369
1370                                 /* lc here must be the regular lc, reset and ready for init */
1371                                 rs->sr_err = ldap_back_prepare_conn( lc, op, rs, sendok );
1372                                 if ( rs->sr_err != LDAP_SUCCESS ) {
1373                                         lc->lc_refcnt = 0;
1374                                 }
1375                         }
1376
1377                         if ( dolock ) {
1378                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1379                         }
1380
1381                         if ( rs->sr_err == LDAP_SUCCESS ) {
1382                                 if ( retries > 0 ) {
1383                                         retries--;
1384                                 }
1385                                 goto retry;
1386                         }
1387                 }
1388
1389                 assert( lc->lc_refcnt == 1 );
1390                 lc->lc_refcnt = 0;
1391                 ldap_back_freeconn( li, lc, dolock );
1392                 *lcp = NULL;
1393                 rs->sr_err = slap_map_api2result( rs );
1394
1395                 if ( LDAP_BACK_QUARANTINE( li ) ) {
1396                         ldap_back_quarantine( op, rs );
1397                 }
1398
1399                 if ( rs->sr_err != LDAP_SUCCESS &&
1400                         ( sendok & LDAP_BACK_SENDERR ) )
1401                 {
1402                         send_ldap_result( op, rs );
1403                 }
1404
1405                 return 0;
1406         }
1407
1408         rc = ldap_back_op_result( lc, op, rs, msgid,
1409                 -1, (sendok|LDAP_BACK_BINDING) );
1410         if ( rc == LDAP_SUCCESS ) {
1411                 LDAP_BACK_CONN_ISBOUND_SET( lc );
1412         }
1413
1414 done:;
1415         LDAP_BACK_CONN_BINDING_CLEAR( lc );
1416         rc = LDAP_BACK_CONN_ISBOUND( lc );
1417         if ( !rc ) {
1418                 ldap_back_release_conn_lock( li, lcp, dolock );
1419
1420         } else if ( LDAP_BACK_SAVECRED( li ) ) {
1421                 ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
1422         }
1423
1424         return rc;
1425 }
1426
1427 /*
1428  * ldap_back_dobind
1429  *
1430  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
1431  */
1432 int
1433 ldap_back_dobind( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1434 {
1435         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1436
1437         return ldap_back_dobind_int( lcp, op, rs,
1438                 ( sendok | LDAP_BACK_GETCONN ), li->li_nretries, 1 );
1439 }
1440
1441 /*
1442  * ldap_back_default_rebind
1443  *
1444  * This is a callback used for chasing referrals using the same
1445  * credentials as the original user on this session.
1446  */
1447 int
1448 ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
1449         ber_int_t msgid, void *params )
1450 {
1451         ldapconn_t      *lc = (ldapconn_t *)params;
1452
1453 #ifdef HAVE_TLS
1454         /* ... otherwise we couldn't get here */
1455         assert( lc != NULL );
1456
1457         if ( !ldap_tls_inplace( ld ) ) {
1458                 int             is_tls = LDAP_BACK_CONN_ISTLS( lc ),
1459                                 rc;
1460                 const char      *text = NULL;
1461
1462                 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
1463                         LDAP_BACK_RETRY_DEFAULT, &text );
1464                 if ( rc != LDAP_SUCCESS ) {
1465                         return rc;
1466                 }
1467         }
1468 #endif /* HAVE_TLS */
1469
1470         /* FIXME: add checks on the URL/identity? */
1471
1472         return ldap_sasl_bind_s( ld,
1473                         BER_BVISNULL( &lc->lc_cred ) ? "" : lc->lc_bound_ndn.bv_val,
1474                         LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
1475 }
1476
1477 /*
1478  * ldap_back_default_urllist
1479  */
1480 int
1481 ldap_back_default_urllist(
1482         LDAP            *ld,
1483         LDAPURLDesc     **urllist,
1484         LDAPURLDesc     **url,
1485         void            *params )
1486 {
1487         ldapinfo_t      *li = (ldapinfo_t *)params;
1488         LDAPURLDesc     **urltail;
1489
1490         if ( urllist == url ) {
1491                 return LDAP_SUCCESS;
1492         }
1493
1494         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
1495                 /* count */ ;
1496
1497         *urltail = *urllist;
1498         *urllist = *url;
1499         *url = NULL;
1500
1501         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
1502         if ( li->li_uri ) {
1503                 ch_free( li->li_uri );
1504         }
1505
1506         ldap_get_option( ld, LDAP_OPT_URI, (void *)&li->li_uri );
1507         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
1508
1509         return LDAP_SUCCESS;
1510 }
1511
1512 int
1513 ldap_back_cancel(
1514                 ldapconn_t              *lc,
1515                 Operation               *op,
1516                 SlapReply               *rs,
1517                 ber_int_t               msgid,
1518                 ldap_back_send_t        sendok )
1519 {
1520         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1521
1522         /* default behavior */
1523         if ( LDAP_BACK_ABANDON( li ) ) {
1524                 return ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
1525         }
1526
1527         if ( LDAP_BACK_IGNORE( li ) ) {
1528                 return ldap_pvt_discard( lc->lc_ld, msgid );
1529         }
1530
1531         if ( LDAP_BACK_CANCEL( li ) ) {
1532                 /* FIXME: asynchronous? */
1533                 return ldap_cancel_s( lc->lc_ld, msgid, NULL, NULL );
1534         }
1535
1536         assert( 0 );
1537
1538         return LDAP_OTHER;
1539 }
1540
1541 int
1542 ldap_back_op_result(
1543                 ldapconn_t              *lc,
1544                 Operation               *op,
1545                 SlapReply               *rs,
1546                 ber_int_t               msgid,
1547                 time_t                  timeout,
1548                 ldap_back_send_t        sendok )
1549 {
1550         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1551
1552         char            *match = NULL;
1553         char            *text = NULL;
1554         char            **refs = NULL;
1555         LDAPControl     **ctrls = NULL;
1556
1557 #define ERR_OK(err) ((err) == LDAP_SUCCESS || (err) == LDAP_COMPARE_FALSE || (err) == LDAP_COMPARE_TRUE)
1558
1559         rs->sr_text = NULL;
1560         rs->sr_matched = NULL;
1561         rs->sr_ref = NULL;
1562         rs->sr_ctrls = NULL;
1563
1564         /* if the error recorded in the reply corresponds
1565          * to a successful state, get the error from the
1566          * remote server response */
1567         if ( ERR_OK( rs->sr_err ) ) {
1568                 int             rc;
1569                 struct timeval  tv;
1570                 LDAPMessage     *res = NULL;
1571                 time_t          stoptime = (time_t)(-1);
1572                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
1573                                         LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
1574                 const char      *timeout_text = "Operation timed out";
1575
1576                 /* if timeout is not specified, compute and use
1577                  * the one specific to the ongoing operation */
1578                 if ( timeout == (time_t)(-1) ) {
1579                         slap_op_t       opidx = slap_req2op( op->o_tag );
1580
1581                         if ( opidx == SLAP_OP_SEARCH ) {
1582                                 if ( op->ors_tlimit <= 0 ) {
1583                                         timeout = 0;
1584
1585                                 } else {
1586                                         timeout = op->ors_tlimit;
1587                                         timeout_err = LDAP_TIMELIMIT_EXCEEDED;
1588                                         timeout_text = NULL;
1589                                 }
1590
1591                         } else {
1592                                 timeout = li->li_timeout[ opidx ];
1593                         }
1594                 }
1595
1596                 /* better than nothing :) */
1597                 if ( timeout == 0 ) {
1598                         if ( li->li_idle_timeout ) {
1599                                 timeout = li->li_idle_timeout;
1600
1601                         } else if ( li->li_conn_ttl ) {
1602                                 timeout = li->li_conn_ttl;
1603                         }
1604                 }
1605
1606                 if ( timeout ) {
1607                         stoptime = op->o_time + timeout;
1608                 }
1609
1610                 LDAP_BACK_TV_SET( &tv );
1611
1612 retry:;
1613                 /* if result parsing fails, note the failure reason */
1614                 rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1615                 switch ( rc ) {
1616                 case 0:
1617                         if ( timeout && slap_get_time() > stoptime ) {
1618                                 if ( sendok & LDAP_BACK_BINDING ) {
1619                                         ldap_unbind_ext( lc->lc_ld, NULL, NULL );
1620                                         lc->lc_ld = NULL;
1621                                         LDAP_BACK_CONN_TAINTED_SET( lc );
1622
1623                                 } else {
1624                                         (void)ldap_back_cancel( lc, op, rs, msgid, sendok );
1625                                 }
1626                                 rs->sr_err = timeout_err;
1627                                 rs->sr_text = timeout_text;
1628                                 break;
1629                         }
1630
1631                         /* timeout == 0 */
1632                         LDAP_BACK_TV_SET( &tv );
1633                         ldap_pvt_thread_yield();
1634                         goto retry;
1635
1636                 case -1:
1637                         ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
1638                                         &rs->sr_err );
1639                         break;
1640
1641
1642                 /* otherwise get the result; if it is not
1643                  * LDAP_SUCCESS, record it in the reply
1644                  * structure (this includes
1645                  * LDAP_COMPARE_{TRUE|FALSE}) */
1646                 default:
1647                         /* only touch when activity actually took place... */
1648                         if ( li->li_idle_timeout && lc ) {
1649                                 lc->lc_time = op->o_time;
1650                         }
1651
1652                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
1653                                         &match, &text, &refs, &ctrls, 1 );
1654                         rs->sr_text = text;
1655                         if ( rc != LDAP_SUCCESS ) {
1656                                 rs->sr_err = rc;
1657                         }
1658                         if ( refs != NULL ) {
1659                                 int     i;
1660
1661                                 for ( i = 0; refs[ i ] != NULL; i++ )
1662                                         /* count */ ;
1663                                 rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1664                                         op->o_tmpmemctx );
1665                                 for ( i = 0; refs[ i ] != NULL; i++ ) {
1666                                         ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1667                                 }
1668                                 BER_BVZERO( &rs->sr_ref[ i ] );
1669                         }
1670                         if ( ctrls != NULL ) {
1671                                 rs->sr_ctrls = ctrls;
1672                         }
1673                 }
1674         }
1675
1676         /* if the error in the reply structure is not
1677          * LDAP_SUCCESS, try to map it from client
1678          * to server error */
1679         if ( !ERR_OK( rs->sr_err ) ) {
1680                 rs->sr_err = slap_map_api2result( rs );
1681
1682                 /* internal ops ( op->o_conn == NULL )
1683                  * must not reply to client */
1684                 if ( op->o_conn && !op->o_do_not_cache && match ) {
1685
1686                         /* record the (massaged) matched
1687                          * DN into the reply structure */
1688                         rs->sr_matched = match;
1689                 }
1690         }
1691
1692         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1693                 if ( !( sendok & LDAP_BACK_RETRYING ) ) {
1694                         if ( LDAP_BACK_QUARANTINE( li ) ) {
1695                                 ldap_back_quarantine( op, rs );
1696                         }
1697                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1698                                 send_ldap_result( op, rs );
1699                         }
1700                 }
1701
1702         } else if ( op->o_conn &&
1703                 ( ( ( sendok & LDAP_BACK_SENDOK ) && ERR_OK( rs->sr_err ) )
1704                         || ( ( sendok & LDAP_BACK_SENDERR ) && rs->sr_err != LDAP_SUCCESS ) ) )
1705         {
1706                 send_ldap_result( op, rs );
1707         }
1708
1709         if ( match ) {
1710                 if ( rs->sr_matched != match ) {
1711                         free( (char *)rs->sr_matched );
1712                 }
1713                 rs->sr_matched = NULL;
1714                 ldap_memfree( match );
1715         }
1716
1717         if ( text ) {
1718                 ldap_memfree( text );
1719         }
1720         rs->sr_text = NULL;
1721
1722         if ( rs->sr_ref ) {
1723                 assert( refs != NULL );
1724                 ber_memvfree( (void **)refs );
1725                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1726                 rs->sr_ref = NULL;
1727         }
1728
1729         if ( ctrls ) {
1730                 assert( rs->sr_ctrls != NULL );
1731                 ldap_controls_free( ctrls );
1732                 rs->sr_ctrls = NULL;
1733         }
1734
1735         return( ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
1736 }
1737
1738 /* return true if bound, false if failed */
1739 int
1740 ldap_back_retry( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1741 {
1742         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1743         int             rc = 0,
1744                         binding;
1745
1746         assert( lcp != NULL );
1747         assert( *lcp != NULL );
1748
1749         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1750
1751         if ( (*lcp)->lc_refcnt == 1 ) {
1752                 binding = LDAP_BACK_CONN_BINDING( *lcp );
1753
1754                 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
1755                 Debug( LDAP_DEBUG_ANY,
1756                         "%s ldap_back_retry: retrying URI=\"%s\" DN=\"%s\"\n",
1757                         op->o_log_prefix, li->li_uri,
1758                         BER_BVISNULL( &(*lcp)->lc_bound_ndn ) ?
1759                                 "" : (*lcp)->lc_bound_ndn.bv_val );
1760                 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
1761
1762                 ldap_unbind_ext( (*lcp)->lc_ld, NULL, NULL );
1763                 (*lcp)->lc_ld = NULL;
1764                 LDAP_BACK_CONN_ISBOUND_CLEAR( (*lcp) );
1765
1766                 /* lc here must be the regular lc, reset and ready for init */
1767                 rc = ldap_back_prepare_conn( *lcp, op, rs, sendok );
1768                 if ( rc != LDAP_SUCCESS ) {
1769                         /* freeit, because lc_refcnt == 1 */
1770                         (*lcp)->lc_refcnt = 0;
1771                         (void)ldap_back_freeconn( li, *lcp, 0 );
1772                         *lcp = NULL;
1773                         rc = 0;
1774
1775                 } else if ( ( sendok & LDAP_BACK_BINDING ) ) {
1776                         if ( binding ) {
1777                                 LDAP_BACK_CONN_BINDING_SET( *lcp );
1778                         }
1779                         rc = 1;
1780
1781                 } else {
1782                         rc = ldap_back_dobind_int( lcp, op, rs, sendok, 0, 0 );
1783                         if ( rc == 0 && *lcp != NULL ) {
1784                                 /* freeit, because lc_refcnt == 1 */
1785                                 (*lcp)->lc_refcnt = 0;
1786                                 LDAP_BACK_CONN_TAINTED_SET( *lcp );
1787                                 (void)ldap_back_freeconn( li, *lcp, 0 );
1788                                 *lcp = NULL;
1789                         }
1790                 }
1791
1792         } else {
1793                 Debug( LDAP_DEBUG_TRACE,
1794                         "ldap_back_retry: conn %p refcnt=%u unable to retry.\n",
1795                         (void *)(*lcp), (*lcp)->lc_refcnt, 0 );
1796
1797                 LDAP_BACK_CONN_TAINTED_SET( *lcp );
1798                 ldap_back_release_conn_lock( li, lcp, 0 );
1799                 assert( *lcp == NULL );
1800
1801                 if ( sendok ) {
1802                         rs->sr_err = LDAP_UNAVAILABLE;
1803                         rs->sr_text = "unable to retry";
1804                         send_ldap_result( op, rs );
1805                 }
1806         }
1807
1808         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1809
1810         return rc;
1811 }
1812
1813 static int
1814 ldap_back_is_proxy_authz( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
1815         struct berval *binddn, struct berval *bindcred )
1816 {
1817         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1818         struct berval   ndn;
1819         int             dobind = 0;
1820
1821         if ( op->o_conn == NULL || op->o_do_not_cache ) {
1822                 goto done;
1823         }
1824
1825         /* don't proxyAuthz if protocol is not LDAPv3 */
1826         switch ( li->li_version ) {
1827         case LDAP_VERSION3:
1828                 break;
1829
1830         case 0:
1831                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
1832                         break;
1833                 }
1834                 /* fall thru */
1835
1836         default:
1837                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
1838                 if ( sendok & LDAP_BACK_SENDERR ) {
1839                         send_ldap_result( op, rs );
1840                         dobind = -1;
1841                 }
1842                 goto done;
1843         }
1844
1845         /* safe default */
1846         *binddn = slap_empty_bv;
1847         *bindcred = slap_empty_bv;
1848
1849         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1850                 ndn = op->o_conn->c_ndn;
1851
1852         } else {
1853                 ndn = op->o_ndn;
1854         }
1855
1856         switch ( li->li_idassert_mode ) {
1857         case LDAP_BACK_IDASSERT_LEGACY:
1858                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
1859                         if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) )
1860                         {
1861                                 *binddn = li->li_idassert_authcDN;
1862                                 *bindcred = li->li_idassert_passwd;
1863                                 dobind = 1;
1864                         }
1865                 }
1866                 break;
1867
1868         default:
1869                 /* NOTE: rootdn can always idassert */
1870                 if ( BER_BVISNULL( &ndn )
1871                         && li->li_idassert_authz == NULL
1872                         && !( li->li_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
1873                 {
1874                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1875                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
1876                                 if ( sendok & LDAP_BACK_SENDERR ) {
1877                                         send_ldap_result( op, rs );
1878                                         dobind = -1;
1879                                 }
1880
1881                         } else {
1882                                 rs->sr_err = LDAP_SUCCESS;
1883                                 *binddn = slap_empty_bv;
1884                                 *bindcred = slap_empty_bv;
1885                                 break;
1886                         }
1887
1888                         goto done;
1889
1890                 } else if ( li->li_idassert_authz && !be_isroot( op ) ) {
1891                         struct berval authcDN;
1892
1893                         if ( BER_BVISNULL( &ndn ) ) {
1894                                 authcDN = slap_empty_bv;
1895
1896                         } else {
1897                                 authcDN = ndn;
1898                         }
1899                         rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz,
1900                                         &authcDN, &authcDN );
1901                         if ( rs->sr_err != LDAP_SUCCESS ) {
1902                                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
1903                                         if ( sendok & LDAP_BACK_SENDERR ) {
1904                                                 send_ldap_result( op, rs );
1905                                                 dobind = -1;
1906                                         }
1907
1908                                 } else {
1909                                         rs->sr_err = LDAP_SUCCESS;
1910                                         *binddn = slap_empty_bv;
1911                                         *bindcred = slap_empty_bv;
1912                                         break;
1913                                 }
1914
1915                                 goto done;
1916                         }
1917                 }
1918
1919                 *binddn = li->li_idassert_authcDN;
1920                 *bindcred = li->li_idassert_passwd;
1921                 dobind = 1;
1922                 break;
1923         }
1924
1925 done:;
1926         return dobind;
1927 }
1928
1929 static int
1930 ldap_back_proxy_authz_bind(
1931         ldapconn_t              *lc,
1932         Operation               *op,
1933         SlapReply               *rs,
1934         ldap_back_send_t        sendok,
1935         struct berval           *binddn,
1936         struct berval           *bindcred )
1937 {
1938         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1939         struct berval   ndn;
1940         int             msgid;
1941         int             rc;
1942
1943         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
1944                 ndn = op->o_conn->c_ndn;
1945
1946         } else {
1947                 ndn = op->o_ndn;
1948         }
1949
1950         if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
1951 #ifdef HAVE_CYRUS_SASL
1952                 void            *defaults = NULL;
1953                 struct berval   authzID = BER_BVNULL;
1954                 int             freeauthz = 0;
1955
1956                 /* if SASL supports native authz, prepare for it */
1957                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
1958                                 ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
1959                 {
1960                         switch ( li->li_idassert_mode ) {
1961                         case LDAP_BACK_IDASSERT_OTHERID:
1962                         case LDAP_BACK_IDASSERT_OTHERDN:
1963                                 authzID = li->li_idassert_authzID;
1964                                 break;
1965
1966                         case LDAP_BACK_IDASSERT_ANONYMOUS:
1967                                 BER_BVSTR( &authzID, "dn:" );
1968                                 break;
1969
1970                         case LDAP_BACK_IDASSERT_SELF:
1971                                 if ( BER_BVISNULL( &ndn ) ) {
1972                                         /* connection is not authc'd, so don't idassert */
1973                                         BER_BVSTR( &authzID, "dn:" );
1974                                         break;
1975                                 }
1976                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
1977                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
1978                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
1979                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
1980                                                 ndn.bv_val, ndn.bv_len + 1 );
1981                                 freeauthz = 1;
1982                                 break;
1983
1984                         default:
1985                                 break;
1986                         }
1987                 }
1988
1989                 if ( li->li_idassert_secprops != NULL ) {
1990                         rs->sr_err = ldap_set_option( lc->lc_ld,
1991                                 LDAP_OPT_X_SASL_SECPROPS,
1992                                 (void *)li->li_idassert_secprops );
1993
1994                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
1995                                 rs->sr_err = LDAP_OTHER;
1996                                 if ( sendok & LDAP_BACK_SENDERR ) {
1997                                         send_ldap_result( op, rs );
1998                                 }
1999                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2000                                 goto done;
2001                         }
2002                 }
2003
2004                 defaults = lutil_sasl_defaults( lc->lc_ld,
2005                                 li->li_idassert_sasl_mech.bv_val,
2006                                 li->li_idassert_sasl_realm.bv_val,
2007                                 li->li_idassert_authcID.bv_val,
2008                                 li->li_idassert_passwd.bv_val,
2009                                 authzID.bv_val );
2010
2011                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld, binddn->bv_val,
2012                                 li->li_idassert_sasl_mech.bv_val, NULL, NULL,
2013                                 LDAP_SASL_QUIET, lutil_sasl_interact,
2014                                 defaults );
2015
2016                 rs->sr_err = slap_map_api2result( rs );
2017                 if ( rs->sr_err != LDAP_SUCCESS ) {
2018                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2019                         if ( sendok & LDAP_BACK_SENDERR ) {
2020                                 send_ldap_result( op, rs );
2021                         }
2022
2023                 } else {
2024                         LDAP_BACK_CONN_ISBOUND_SET( lc );
2025                 }
2026
2027                 lutil_sasl_freedefs( defaults );
2028                 if ( freeauthz ) {
2029                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
2030                 }
2031
2032                 goto done;
2033 #endif /* HAVE_CYRUS_SASL */
2034         }
2035
2036         switch ( li->li_idassert_authmethod ) {
2037         case LDAP_AUTH_NONE:
2038                 /* FIXME: do we really need this? */
2039                 BER_BVSTR( binddn, "" );
2040                 BER_BVSTR( bindcred, "" );
2041                 /* fallthru */
2042
2043         case LDAP_AUTH_SIMPLE:
2044                 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
2045                                 binddn->bv_val, LDAP_SASL_SIMPLE,
2046                                 bindcred, NULL, NULL, &msgid );
2047                 rc = ldap_back_op_result( lc, op, rs, msgid,
2048                         -1, (sendok|LDAP_BACK_BINDING) );
2049                 break;
2050
2051         default:
2052                 /* unsupported! */
2053                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2054                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
2055                 if ( sendok & LDAP_BACK_SENDERR ) {
2056                         send_ldap_result( op, rs );
2057                 }
2058                 goto done;
2059         }
2060
2061         if ( rc == LDAP_SUCCESS ) {
2062                 /* set rebind stuff in case of successful proxyAuthz bind,
2063                  * so that referral chasing is attempted using the right
2064                  * identity */
2065                 LDAP_BACK_CONN_ISBOUND_SET( lc );
2066                 ber_bvreplace( &lc->lc_bound_ndn, binddn );
2067
2068                 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
2069                         memset( lc->lc_cred.bv_val, 0,
2070                                         lc->lc_cred.bv_len );
2071                 }
2072
2073                 if ( LDAP_BACK_SAVECRED( li ) ) {
2074                         ber_bvreplace( &lc->lc_cred, bindcred );
2075                         ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
2076
2077                 } else {
2078                         lc->lc_cred.bv_len = 0;
2079                 }
2080         }
2081 done:;
2082         return LDAP_BACK_CONN_ISBOUND( lc );
2083 }
2084
2085 /*
2086  * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
2087  * to existing server-side controls if required; if not,
2088  * the existing server-side controls are placed in *pctrls.
2089  * The caller, after using the controls in client API
2090  * operations, if ( *pctrls != op->o_ctrls ), should
2091  * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
2092  * The function returns success if the control could
2093  * be added if required, or if it did nothing; in the future,
2094  * it might return some error if it failed.
2095  *
2096  * if no bind took place yet, but the connection is bound
2097  * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
2098  * and explicitly add proxyAuthz the control to every operation
2099  * with the dn bound to the connection as control value.
2100  *
2101  * If no server-side controls are defined for the operation,
2102  * simply add the proxyAuthz control; otherwise, if the
2103  * proxyAuthz control is not already set, add it as
2104  * the first one
2105  *
2106  * FIXME: is controls order significant for security?
2107  * ANSWER: controls ordering and interoperability
2108  * must be indicated by the specs of each control; if none
2109  * is specified, the order is irrelevant.
2110  */
2111 int
2112 ldap_back_proxy_authz_ctrl(
2113                 struct berval   *bound_ndn,
2114                 int             version,
2115                 slap_idassert_t *si,
2116                 Operation       *op,
2117                 SlapReply       *rs,
2118                 LDAPControl     ***pctrls )
2119 {
2120         LDAPControl             **ctrls = NULL;
2121         int                     i = 0;
2122         slap_idassert_mode_t    mode;
2123         struct berval           assertedID,
2124                                 ndn;
2125         int                     isroot = 0;
2126
2127         *pctrls = NULL;
2128
2129         rs->sr_err = LDAP_SUCCESS;
2130
2131         /* don't proxyAuthz if protocol is not LDAPv3 */
2132         switch ( version ) {
2133         case LDAP_VERSION3:
2134                 break;
2135
2136         case 0:
2137                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
2138                         break;
2139                 }
2140                 /* fall thru */
2141
2142         default:
2143                 goto done;
2144         }
2145
2146         /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
2147          * but if it is not set this test fails.  We need a different
2148          * means to detect if idassert is enabled */
2149         if ( ( BER_BVISNULL( &si->si_bc.sb_authcId ) || BER_BVISEMPTY( &si->si_bc.sb_authcId ) )
2150                         && ( BER_BVISNULL( &si->si_bc.sb_binddn ) || BER_BVISEMPTY( &si->si_bc.sb_binddn ) ) )
2151         {
2152                 goto done;
2153         }
2154
2155         if ( !op->o_conn || op->o_do_not_cache || ( isroot = be_isroot( op ) ) ) {
2156                 goto done;
2157         }
2158
2159         if ( op->o_tag == LDAP_REQ_BIND ) {
2160                 ndn = op->o_req_ndn;
2161
2162         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
2163                 ndn = op->o_conn->c_ndn;
2164
2165         } else {
2166                 ndn = op->o_ndn;
2167         }
2168
2169         if ( si->si_mode == LDAP_BACK_IDASSERT_LEGACY ) {
2170                 if ( op->o_proxy_authz ) {
2171                         /*
2172                          * FIXME: we do not want to perform proxyAuthz
2173                          * on behalf of the client, because this would
2174                          * be performed with "proxyauthzdn" privileges.
2175                          *
2176                          * This might actually be too strict, since
2177                          * the "proxyauthzdn" authzTo, and each entry's
2178                          * authzFrom attributes may be crafted
2179                          * to avoid unwanted proxyAuthz to take place.
2180                          */
2181 #if 0
2182                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2183                         rs->sr_text = "proxyAuthz not allowed within namingContext";
2184 #endif
2185                         goto done;
2186                 }
2187
2188                 if ( !BER_BVISNULL( bound_ndn ) ) {
2189                         goto done;
2190                 }
2191
2192                 if ( BER_BVISNULL( &ndn ) ) {
2193                         goto done;
2194                 }
2195
2196                 if ( BER_BVISNULL( &si->si_bc.sb_binddn ) ) {
2197                         goto done;
2198                 }
2199
2200         } else if ( si->si_bc.sb_method == LDAP_AUTH_SASL ) {
2201                 if ( ( si->si_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
2202                 {
2203                         /* already asserted in SASL via native authz */
2204                         goto done;
2205                 }
2206
2207         } else if ( si->si_authz && !isroot ) {
2208                 int             rc;
2209                 struct berval authcDN;
2210
2211                 if ( BER_BVISNULL( &ndn ) ) {
2212                         authcDN = slap_empty_bv;
2213                 } else {
2214                         authcDN = ndn;
2215                 }
2216                 rc = slap_sasl_matches( op, si->si_authz,
2217                                 &authcDN, & authcDN );
2218                 if ( rc != LDAP_SUCCESS ) {
2219                         if ( si->si_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
2220                                 /* ndn is not authorized
2221                                  * to use idassert */
2222                                 rs->sr_err = rc;
2223                         }
2224                         goto done;
2225                 }
2226         }
2227
2228         if ( op->o_proxy_authz ) {
2229                 /*
2230                  * FIXME: we can:
2231                  * 1) ignore the already set proxyAuthz control
2232                  * 2) leave it in place, and don't set ours
2233                  * 3) add both
2234                  * 4) reject the operation
2235                  *
2236                  * option (4) is very drastic
2237                  * option (3) will make the remote server reject
2238                  * the operation, thus being equivalent to (4)
2239                  * option (2) will likely break the idassert
2240                  * assumptions, so we cannot accept it;
2241                  * option (1) means that we are contradicting
2242                  * the client's reques.
2243                  *
2244                  * I think (4) is the only correct choice.
2245                  */
2246                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2247                 rs->sr_text = "proxyAuthz not allowed within namingContext";
2248         }
2249
2250         if ( op->o_is_auth_check ) {
2251                 mode = LDAP_BACK_IDASSERT_NOASSERT;
2252
2253         } else {
2254                 mode = si->si_mode;
2255         }
2256
2257         switch ( mode ) {
2258         case LDAP_BACK_IDASSERT_LEGACY:
2259                 /* original behavior:
2260                  * assert the client's identity */
2261         case LDAP_BACK_IDASSERT_SELF:
2262                 assertedID = ndn;
2263                 break;
2264
2265         case LDAP_BACK_IDASSERT_ANONYMOUS:
2266                 /* assert "anonymous" */
2267                 assertedID = slap_empty_bv;
2268                 break;
2269
2270         case LDAP_BACK_IDASSERT_NOASSERT:
2271                 /* don't assert; bind as proxyauthzdn */
2272                 goto done;
2273
2274         case LDAP_BACK_IDASSERT_OTHERID:
2275         case LDAP_BACK_IDASSERT_OTHERDN:
2276                 /* assert idassert DN */
2277                 assertedID = si->si_bc.sb_authzId;
2278                 break;
2279
2280         default:
2281                 assert( 0 );
2282         }
2283
2284         /* if we got here, "" is allowed to proxyAuthz */
2285         if ( BER_BVISNULL( &assertedID ) ) {
2286                 assertedID = slap_empty_bv;
2287         }
2288
2289         /* don't idassert the bound DN (ITS#4497) */
2290         if ( dn_match( &assertedID, bound_ndn ) ) {
2291                 goto done;
2292         }
2293
2294         if ( op->o_ctrls ) {
2295                 for ( i = 0; op->o_ctrls[ i ]; i++ )
2296                         /* just count ctrls */ ;
2297         }
2298
2299         ctrls = op->o_tmpalloc( sizeof( LDAPControl * ) * (i + 2) + sizeof( LDAPControl ),
2300                         op->o_tmpmemctx );
2301         ctrls[ 0 ] = (LDAPControl *)&ctrls[ i + 2 ];
2302
2303         ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
2304         ctrls[ 0 ]->ldctl_iscritical = 1;
2305
2306         switch ( si->si_mode ) {
2307         /* already in u:ID or dn:DN form */
2308         case LDAP_BACK_IDASSERT_OTHERID:
2309         case LDAP_BACK_IDASSERT_OTHERDN:
2310                 ber_dupbv_x( &ctrls[ 0 ]->ldctl_value, &assertedID, op->o_tmpmemctx );
2311                 break;
2312
2313         /* needs the dn: prefix */
2314         default:
2315                 ctrls[ 0 ]->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
2316                 ctrls[ 0 ]->ldctl_value.bv_val = op->o_tmpalloc( ctrls[ 0 ]->ldctl_value.bv_len + 1,
2317                                 op->o_tmpmemctx );
2318                 AC_MEMCPY( ctrls[ 0 ]->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
2319                 AC_MEMCPY( &ctrls[ 0 ]->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
2320                                 assertedID.bv_val, assertedID.bv_len + 1 );
2321                 break;
2322         }
2323
2324         /* Older versions of <draft-weltman-ldapv3-proxy> required
2325          * to encode the value of the authzID (and called it proxyDN);
2326          * this hack provides compatibility with those DSAs that
2327          * implement it this way */
2328         if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_ENCODING_WORKAROUND ) {
2329                 struct berval           authzID = ctrls[ 0 ]->ldctl_value;
2330                 BerElementBuffer        berbuf;
2331                 BerElement              *ber = (BerElement *)&berbuf;
2332                 ber_tag_t               tag;
2333
2334                 ber_init2( ber, 0, LBER_USE_DER );
2335                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
2336
2337                 tag = ber_printf( ber, "O", &authzID );
2338                 if ( tag == LBER_ERROR ) {
2339                         rs->sr_err = LDAP_OTHER;
2340                         goto free_ber;
2341                 }
2342
2343                 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
2344                         rs->sr_err = LDAP_OTHER;
2345                         goto free_ber;
2346                 }
2347
2348 free_ber:;
2349                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
2350                 ber_free_buf( ber );
2351
2352                 if ( rs->sr_err != LDAP_SUCCESS ) {
2353                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
2354                         ctrls = NULL;
2355                         goto done;
2356                 }
2357
2358         } else if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_PROXY_AUTHZ ) {
2359                 struct berval           authzID = ctrls[ 0 ]->ldctl_value,
2360                                         tmp;
2361                 BerElementBuffer        berbuf;
2362                 BerElement              *ber = (BerElement *)&berbuf;
2363                 ber_tag_t               tag;
2364
2365                 if ( strncasecmp( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ) != 0 ) {
2366                         op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
2367                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
2368                         ctrls = NULL;
2369                         rs->sr_err = LDAP_PROTOCOL_ERROR;
2370                         goto done;
2371                 }
2372
2373                 tmp = authzID;
2374                 tmp.bv_val += STRLENOF( "dn:" );
2375                 tmp.bv_len -= STRLENOF( "dn:" );
2376
2377                 ber_init2( ber, 0, LBER_USE_DER );
2378                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
2379
2380                 /* apparently, Mozilla API encodes this
2381                  * as "SEQUENCE { LDAPDN }" */
2382                 tag = ber_printf( ber, "{O}", &tmp );
2383                 if ( tag == LBER_ERROR ) {
2384                         rs->sr_err = LDAP_OTHER;
2385                         goto free_ber2;
2386                 }
2387
2388                 if ( ber_flatten2( ber, &ctrls[ 0 ]->ldctl_value, 1 ) == -1 ) {
2389                         rs->sr_err = LDAP_OTHER;
2390                         goto free_ber2;
2391                 }
2392
2393 free_ber2:;
2394                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
2395                 ber_free_buf( ber );
2396
2397                 if ( rs->sr_err != LDAP_SUCCESS ) {
2398                         op->o_tmpfree( ctrls, op->o_tmpmemctx );
2399                         ctrls = NULL;
2400                         goto done;
2401                 }
2402
2403                 ctrls[ 0 ]->ldctl_oid = LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ;
2404         }
2405
2406         if ( op->o_ctrls ) {
2407                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
2408                         ctrls[ i + 1 ] = op->o_ctrls[ i ];
2409                 }
2410         }
2411         ctrls[ i + 1 ] = NULL;
2412
2413 done:;
2414         if ( ctrls == NULL ) {
2415                 ctrls = op->o_ctrls;
2416         }
2417
2418         *pctrls = ctrls;
2419
2420         return rs->sr_err;
2421 }
2422
2423 int
2424 ldap_back_proxy_authz_ctrl_free( Operation *op, LDAPControl ***pctrls )
2425 {
2426         LDAPControl     **ctrls = *pctrls;
2427
2428         /* we assume that the first control is the proxyAuthz
2429          * added by back-ldap, so it's the only one we explicitly
2430          * free */
2431         if ( ctrls && ctrls != op->o_ctrls ) {
2432                 assert( ctrls[ 0 ] != NULL );
2433
2434                 if ( !BER_BVISNULL( &ctrls[ 0 ]->ldctl_value ) ) {
2435                         op->o_tmpfree( ctrls[ 0 ]->ldctl_value.bv_val, op->o_tmpmemctx );
2436                 }
2437
2438                 op->o_tmpfree( ctrls, op->o_tmpmemctx );
2439         }
2440
2441         *pctrls = NULL;
2442
2443         return 0;
2444 }