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 1999-2013 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 #include "lutil.h"
  36 #include "lutil_ldap.h"
  37
  38 #define LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ       "2.16.840.1.113730.3.4.12"
  39
  40 #ifdef LDAP_DEVEL
  41 #define SLAP_AUTH_DN 1
  42 #endif
  43
  44 #if LDAP_BACK_PRINT_CONNTREE > 0
  45
  46 static const struct {
  47         slap_mask_t     f;
  48         char            c;
  49 } flagsmap[] = {
  50         { LDAP_BACK_FCONN_ISBOUND,      'B' },
  51         { LDAP_BACK_FCONN_ISANON,       'A' },
  52         { LDAP_BACK_FCONN_ISPRIV,       'P' },
  53         { LDAP_BACK_FCONN_ISTLS,        'T' },
  54         { LDAP_BACK_FCONN_BINDING,      'X' },
  55         { LDAP_BACK_FCONN_TAINTED,      'E' },
  56         { LDAP_BACK_FCONN_ABANDON,      'N' },
  57         { LDAP_BACK_FCONN_ISIDASR,      'S' },
  58         { LDAP_BACK_FCONN_CACHED,       'C' },
  59         { 0,                            '\0' }
  60 };
  61
  62 static void
  63 ldap_back_conn_print( ldapconn_t *lc, const char *avlstr )
  64 {
  65         char buf[ SLAP_TEXT_BUFLEN ];
  66         char fbuf[ sizeof("BAPTIENSC") ];
  67         int i;
  68
  69         ldap_back_conn2str( &lc->lc_base, buf, sizeof( buf ) );
  70         for ( i = 0; flagsmap[ i ].c != '\0'; i++ ) {
  71                 if ( lc->lc_lcflags & flagsmap[i].f ) {
  72                         fbuf[i] = flagsmap[i].c;
  73
  74                 } else {
  75                         fbuf[i] = '.';
  76                 }
  77         }
  78         fbuf[i] = '\0';
  79
  80         fprintf( stderr, "lc=%p %s %s flags=0x%08x (%s)\n",
  81                 (void *)lc, buf, avlstr, lc->lc_lcflags, fbuf );
  82 }
  83
  84 static void
  85 ldap_back_ravl_print( Avlnode *root, int depth )
  86 {
  87         int             i;
  88         ldapconn_t      *lc;
  89
  90         if ( root == 0 ) {
  91                 return;
  92         }
  93
  94         ldap_back_ravl_print( root->avl_right, depth+1 );
  95
  96         for ( i = 0; i < depth; i++ ) {
  97                 fprintf( stderr, "-" );
  98         }
  99
 100         lc = root->avl_data;
 101         ldap_back_conn_print( lc, avl_bf2str( root->avl_bf ) );
 102
 103         ldap_back_ravl_print( root->avl_left, depth + 1 );
 104 }
 105
 106 static char* priv2str[] = {
 107         "privileged",
 108         "privileged/TLS",
 109         "anonymous",
 110         "anonymous/TLS",
 111         "bind",
 112         "bind/TLS",
 113         NULL
 114 };
 115
 116 void
 117 ldap_back_print_conntree( ldapinfo_t *li, char *msg )
 118 {
 119         int     c;
 120
 121         fprintf( stderr, "========> %s\n", msg );
 122
 123         for ( c = LDAP_BACK_PCONN_FIRST; c < LDAP_BACK_PCONN_LAST; c++ ) {
 124                 int             i = 0;
 125                 ldapconn_t      *lc;
 126
 127                 fprintf( stderr, "  %s[%d]\n", priv2str[ c ], li->li_conn_priv[ c ].lic_num );
 128
 129                 LDAP_TAILQ_FOREACH( lc, &li->li_conn_priv[ c ].lic_priv, lc_q )
 130                 {
 131                         fprintf( stderr, "    [%d] ", i );
 132                         ldap_back_conn_print( lc, "" );
 133                         i++;
 134                 }
 135         }
 136
 137         if ( li->li_conninfo.lai_tree == 0 ) {
 138                 fprintf( stderr, "\t(empty)\n" );
 139
 140         } else {
 141                 ldap_back_ravl_print( li->li_conninfo.lai_tree, 0 );
 142         }
 143
 144         fprintf( stderr, "<======== %s\n", msg );
 145 }
 146 #endif /* LDAP_BACK_PRINT_CONNTREE */
 147
 148 static int
 149 ldap_back_freeconn( ldapinfo_t *li, ldapconn_t *lc, int dolock );
 150
 151 static ldapconn_t *
 152 ldap_back_getconn( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
 153         struct berval *binddn, struct berval *bindcred );
 154
 155 static int
 156 ldap_back_is_proxy_authz( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
 157         struct berval *binddn, struct berval *bindcred );
 158
 159 static int
 160 ldap_back_proxy_authz_bind( ldapconn_t *lc, Operation *op, SlapReply *rs,
 161         ldap_back_send_t sendok, struct berval *binddn, struct berval *bindcred );
 162
 163 static int
 164 ldap_back_prepare_conn( ldapconn_t *lc, Operation *op, SlapReply *rs,
 165         ldap_back_send_t sendok );
 166
 167 static int
 168 ldap_back_conndnlc_cmp( const void *c1, const void *c2 );
 169
 170 ldapconn_t *
 171 ldap_back_conn_delete( ldapinfo_t *li, ldapconn_t *lc )
 172 {
 173         if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) {
 174                 if ( LDAP_BACK_CONN_CACHED( lc ) ) {
 175                         assert( lc->lc_q.tqe_prev != NULL );
 176                         assert( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num > 0 );
 177                         li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num--;
 178                         LDAP_TAILQ_REMOVE( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q );
 179                         LDAP_TAILQ_ENTRY_INIT( lc, lc_q );
 180                         LDAP_BACK_CONN_CACHED_CLEAR( lc );
 181
 182                 } else {
 183                         assert( LDAP_BACK_CONN_TAINTED( lc ) );
 184                         assert( lc->lc_q.tqe_prev == NULL );
 185                 }
 186
 187         } else {
 188                 ldapconn_t      *tmplc = NULL;
 189
 190                 if ( LDAP_BACK_CONN_CACHED( lc ) ) {
 191                         assert( !LDAP_BACK_CONN_TAINTED( lc ) );
 192                         tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc,
 193                                 ldap_back_conndnlc_cmp );
 194                         assert( tmplc == lc );
 195                         LDAP_BACK_CONN_CACHED_CLEAR( lc );
 196                 }
 197
 198                 assert( LDAP_BACK_CONN_TAINTED( lc ) || tmplc == lc );
 199         }
 200
 201         return lc;
 202 }
 203
 204 int
 205 ldap_back_bind( Operation *op, SlapReply *rs )
 206 {
 207         ldapinfo_t              *li = (ldapinfo_t *) op->o_bd->be_private;
 208         ldapconn_t              *lc;
 209
 210         LDAPControl             **ctrls = NULL;
 211         struct berval           save_o_dn;
 212         int                     save_o_do_not_cache,
 213                                 rc = 0;
 214         ber_int_t               msgid;
 215         ldap_back_send_t        retrying = LDAP_BACK_RETRYING;
 216
 217         /* allow rootdn as a means to auth without the need to actually
 218          * contact the proxied DSA */
 219         switch ( be_rootdn_bind( op, rs ) ) {
 220         case SLAP_CB_CONTINUE:
 221                 break;
 222
 223         default:
 224                 return rs->sr_err;
 225         }
 226
 227         lc = ldap_back_getconn( op, rs, LDAP_BACK_BIND_SERR, NULL, NULL );
 228         if ( !lc ) {
 229                 return rs->sr_err;
 230         }
 231
 232         /* we can do (almost) whatever we want with this conn,
 233          * because either it's temporary, or it's marked as binding */
 234         if ( !BER_BVISNULL( &lc->lc_bound_ndn ) ) {
 235                 ch_free( lc->lc_bound_ndn.bv_val );
 236                 BER_BVZERO( &lc->lc_bound_ndn );
 237         }
 238         if ( !BER_BVISNULL( &lc->lc_cred ) ) {
 239                 memset( lc->lc_cred.bv_val, 0, lc->lc_cred.bv_len );
 240                 ch_free( lc->lc_cred.bv_val );
 241                 BER_BVZERO( &lc->lc_cred );
 242         }
 243         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
 244
 245         /* don't add proxyAuthz; set the bindDN */
 246         save_o_dn = op->o_dn;
 247         save_o_do_not_cache = op->o_do_not_cache;
 248         op->o_dn = op->o_req_dn;
 249         op->o_do_not_cache = 1;
 250
 251         ctrls = op->o_ctrls;
 252         rc = ldap_back_controls_add( op, rs, lc, &ctrls );
 253         op->o_dn = save_o_dn;
 254         op->o_do_not_cache = save_o_do_not_cache;
 255         if ( rc != LDAP_SUCCESS ) {
 256                 send_ldap_result( op, rs );
 257                 ldap_back_release_conn( li, lc );
 258                 return( rc );
 259         }
 260
 261 retry:;
 262         /* method is always LDAP_AUTH_SIMPLE if we got here */
 263         rs->sr_err = ldap_sasl_bind( lc->lc_ld, op->o_req_dn.bv_val,
 264                         LDAP_SASL_SIMPLE,
 265                         &op->orb_cred, ctrls, NULL, &msgid );
 266         /* FIXME: should we always retry, or only when piping the bind
 267          * in the "override" connection pool? */
 268         rc = ldap_back_op_result( lc, op, rs, msgid,
 269                 li->li_timeout[ SLAP_OP_BIND ],
 270                 LDAP_BACK_BIND_SERR | retrying );
 271         if ( rc == LDAP_UNAVAILABLE && retrying ) {
 272                 retrying &= ~LDAP_BACK_RETRYING;
 273                 if ( ldap_back_retry( &lc, op, rs, LDAP_BACK_BIND_SERR ) ) {
 274                         goto retry;
 275                 }
 276         }
 277
 278         ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
 279         ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
 280         ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
 281
 282         ldap_back_controls_free( op, rs, &ctrls );
 283
 284         if ( rc == LDAP_SUCCESS ) {
 285                 op->o_conn->c_authz_cookie = op->o_bd->be_private;
 286
 287                 /* If defined, proxyAuthz will be used also when
 288                  * back-ldap is the authorizing backend; for this
 289                  * purpose, after a successful bind the connection
 290                  * is left for further binds, and further operations
 291                  * on this client connection will use a default
 292                  * connection with identity assertion */
 293                 /* NOTE: use with care */
 294                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) {
 295                         ldap_back_release_conn( li, lc );
 296                         return( rc );
 297                 }
 298
 299                 /* rebind is now done inside ldap_back_proxy_authz_bind()
 300                  * in case of success */
 301                 LDAP_BACK_CONN_ISBOUND_SET( lc );
 302                 ber_dupbv( &lc->lc_bound_ndn, &op->o_req_ndn );
 303
 304                 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
 305                         memset( lc->lc_cred.bv_val, 0,
 306                                         lc->lc_cred.bv_len );
 307                 }
 308
 309                 if ( LDAP_BACK_SAVECRED( li ) ) {
 310                         ber_bvreplace( &lc->lc_cred, &op->orb_cred );
 311                         ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
 312
 313                 } else {
 314                         lc->lc_cred.bv_len = 0;
 315                 }
 316         }
 317
 318         /* must re-insert if local DN changed as result of bind */
 319         if ( !LDAP_BACK_CONN_ISBOUND( lc )
 320                 || ( !dn_match( &op->o_req_ndn, &lc->lc_local_ndn )
 321                         && !LDAP_BACK_PCONN_ISPRIV( lc ) ) )
 322         {
 323                 int             lerr = -1;
 324                 ldapconn_t      *tmplc;
 325
 326                 /* wait for all other ops to release the connection */
 327 retry_lock:;
 328                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 329                 if ( lc->lc_refcnt > 1 ) {
 330                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 331                         ldap_pvt_thread_yield();
 332                         goto retry_lock;
 333                 }
 334
 335 #if LDAP_BACK_PRINT_CONNTREE > 0
 336                 ldap_back_print_conntree( li, ">>> ldap_back_bind" );
 337 #endif /* LDAP_BACK_PRINT_CONNTREE */
 338
 339                 assert( lc->lc_refcnt == 1 );
 340                 ldap_back_conn_delete( li, lc );
 341
 342                 /* delete all cached connections with the current connection */
 343                 if ( LDAP_BACK_SINGLECONN( li ) ) {
 344                         while ( ( tmplc = avl_delete( &li->li_conninfo.lai_tree, (caddr_t)lc, ldap_back_conn_cmp ) ) != NULL )
 345                         {
 346                                 assert( !LDAP_BACK_PCONN_ISPRIV( lc ) );
 347                                 Debug( LDAP_DEBUG_TRACE,
 348                                         "=>ldap_back_bind: destroying conn %lu (refcnt=%u)\n",
 349                                         lc->lc_conn->c_connid, lc->lc_refcnt, 0 );
 350
 351                                 if ( tmplc->lc_refcnt != 0 ) {
 352                                         /* taint it */
 353                                         LDAP_BACK_CONN_TAINTED_SET( tmplc );
 354                                         LDAP_BACK_CONN_CACHED_CLEAR( tmplc );
 355
 356                                 } else {
 357                                         /*
 358                                          * Needs a test because the handler may be corrupted,
 359                                          * and calling ldap_unbind on a corrupted header results
 360                                          * in a segmentation fault
 361                                          */
 362                                         ldap_back_conn_free( tmplc );
 363                                 }
 364                         }
 365                 }
 366
 367                 if ( LDAP_BACK_CONN_ISBOUND( lc ) ) {
 368                         ber_bvreplace( &lc->lc_local_ndn, &op->o_req_ndn );
 369                         if ( be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) {
 370                                 LDAP_BACK_PCONN_ROOTDN_SET( lc, op );
 371                         }
 372                         lerr = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
 373                                 ldap_back_conndn_cmp, ldap_back_conndn_dup );
 374                 }
 375
 376 #if LDAP_BACK_PRINT_CONNTREE > 0
 377                 ldap_back_print_conntree( li, "<<< ldap_back_bind" );
 378 #endif /* LDAP_BACK_PRINT_CONNTREE */
 379
 380                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 381                 switch ( lerr ) {
 382                 case 0:
 383                         LDAP_BACK_CONN_CACHED_SET( lc );
 384                         break;
 385
 386                 case -1:
 387                         /* duplicate; someone else successfully bound
 388                          * on the same connection with the same identity;
 389                          * we can do this because lc_refcnt == 1 */
 390                         ldap_back_conn_free( lc );
 391                         lc = NULL;
 392                 }
 393         }
 394
 395         if ( lc != NULL ) {
 396                 ldap_back_release_conn( li, lc );
 397         }
 398
 399         return( rc );
 400 }
 401
 402 /*
 403  * ldap_back_conndn_cmp
 404  *
 405  * compares two ldapconn_t based on the value of the conn pointer
 406  * and of the local DN; used by avl stuff for insert, lookup
 407  * and direct delete
 408  */
 409 int
 410 ldap_back_conndn_cmp( const void *c1, const void *c2 )
 411 {
 412         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 413         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 414         int rc;
 415
 416         /* If local DNs don't match, it is definitely not a match */
 417         /* For shared sessions, conn is NULL. Only explicitly
 418          * bound sessions will have non-NULL conn.
 419          */
 420         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 421         if ( rc == 0 ) {
 422                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 423         }
 424
 425         return rc;
 426 }
 427
 428 /*
 429  * ldap_back_conndnlc_cmp
 430  *
 431  * compares two ldapconn_t based on the value of the conn pointer,
 432  * the local DN and the lc pointer; used by avl stuff for insert, lookup
 433  * and direct delete
 434  */
 435 static int
 436 ldap_back_conndnlc_cmp( const void *c1, const void *c2 )
 437 {
 438         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 439         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 440         int rc;
 441
 442         /* If local DNs don't match, it is definitely not a match */
 443         /* For shared sessions, conn is NULL. Only explicitly
 444          * bound sessions will have non-NULL conn.
 445          */
 446         rc = SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 447         if ( rc == 0 ) {
 448                 rc = ber_bvcmp( &lc1->lc_local_ndn, &lc2->lc_local_ndn );
 449                 if ( rc == 0 ) {
 450                         rc = SLAP_PTRCMP( lc1, lc2 );
 451                 }
 452         }
 453
 454         return rc;
 455 }
 456
 457 /*
 458  * ldap_back_conn_cmp
 459  *
 460  * compares two ldapconn_t based on the value of the conn pointer;
 461  * used by avl stuff for delete of all conns with the same connid
 462  */
 463 int
 464 ldap_back_conn_cmp( const void *c1, const void *c2 )
 465 {
 466         const ldapconn_t        *lc1 = (const ldapconn_t *)c1;
 467         const ldapconn_t        *lc2 = (const ldapconn_t *)c2;
 468
 469         /* For shared sessions, conn is NULL. Only explicitly
 470          * bound sessions will have non-NULL conn.
 471          */
 472         return SLAP_PTRCMP( lc1->lc_conn, lc2->lc_conn );
 473 }
 474
 475 /*
 476  * ldap_back_conndn_dup
 477  *
 478  * returns -1 in case a duplicate ldapconn_t has been inserted;
 479  * used by avl stuff
 480  */
 481 int
 482 ldap_back_conndn_dup( void *c1, void *c2 )
 483 {
 484         ldapconn_t      *lc1 = (ldapconn_t *)c1;
 485         ldapconn_t      *lc2 = (ldapconn_t *)c2;
 486
 487         /* Cannot have more than one shared session with same DN */
 488         if ( lc1->lc_conn == lc2->lc_conn &&
 489                 dn_match( &lc1->lc_local_ndn, &lc2->lc_local_ndn ) )
 490         {
 491                 return -1;
 492         }
 493
 494         return 0;
 495 }
 496
 497 static int
 498 ldap_back_freeconn( ldapinfo_t *li, ldapconn_t *lc, int dolock )
 499 {
 500         if ( dolock ) {
 501                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 502         }
 503
 504 #if LDAP_BACK_PRINT_CONNTREE > 0
 505         ldap_back_print_conntree( li, ">>> ldap_back_freeconn" );
 506 #endif /* LDAP_BACK_PRINT_CONNTREE */
 507
 508         (void)ldap_back_conn_delete( li, lc );
 509
 510         if ( lc->lc_refcnt == 0 ) {
 511                 ldap_back_conn_free( (void *)lc );
 512         }
 513
 514 #if LDAP_BACK_PRINT_CONNTREE > 0
 515         ldap_back_print_conntree( li, "<<< ldap_back_freeconn" );
 516 #endif /* LDAP_BACK_PRINT_CONNTREE */
 517
 518         if ( dolock ) {
 519                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 520         }
 521
 522         return 0;
 523 }
 524
 525 #ifdef HAVE_TLS
 526 static int
 527 ldap_back_start_tls(
 528         LDAP            *ld,
 529         int             protocol,
 530         int             *is_tls,
 531         const char      *url,
 532         unsigned        flags,
 533         int             retries,
 534         const char      **text )
 535 {
 536         int             rc = LDAP_SUCCESS;
 537
 538         /* start TLS ("tls-[try-]{start,propagate}" statements) */
 539         if ( ( LDAP_BACK_USE_TLS_F( flags ) || ( *is_tls && LDAP_BACK_PROPAGATE_TLS_F( flags ) ) )
 540                                 && !ldap_is_ldaps_url( url ) )
 541         {
 542 #ifdef SLAP_STARTTLS_ASYNCHRONOUS
 543                 /*
 544                  * use asynchronous StartTLS
 545                  * in case, chase referral (not implemented yet)
 546                  */
 547                 int             msgid;
 548
 549                 if ( protocol == 0 ) {
 550                         ldap_get_option( ld, LDAP_OPT_PROTOCOL_VERSION,
 551                                         (void *)&protocol );
 552                 }
 553
 554                 if ( protocol < LDAP_VERSION3 ) {
 555                         /* we should rather bail out... */
 556                         rc = LDAP_UNWILLING_TO_PERFORM;
 557                         *text = "invalid protocol version";
 558                 }
 559
 560                 if ( rc == LDAP_SUCCESS ) {
 561                         rc = ldap_start_tls( ld, NULL, NULL, &msgid );
 562                 }
 563
 564                 if ( rc == LDAP_SUCCESS ) {
 565                         LDAPMessage     *res = NULL;
 566                         struct timeval  tv;
 567
 568                         LDAP_BACK_TV_SET( &tv );
 569
 570 retry:;
 571                         rc = ldap_result( ld, msgid, LDAP_MSG_ALL, &tv, &res );
 572                         if ( rc < 0 ) {
 573                                 rc = LDAP_UNAVAILABLE;
 574
 575                         } else if ( rc == 0 ) {
 576                                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
 577                                         ldap_pvt_thread_yield();
 578                                         if ( retries > 0 ) {
 579                                                 retries--;
 580                                         }
 581                                         LDAP_BACK_TV_SET( &tv );
 582                                         goto retry;
 583                                 }
 584                                 rc = LDAP_UNAVAILABLE;
 585
 586                         } else if ( rc == LDAP_RES_EXTENDED ) {
 587                                 struct berval   *data = NULL;
 588
 589                                 rc = ldap_parse_extended_result( ld, res,
 590                                                 NULL, &data, 0 );
 591                                 if ( rc == LDAP_SUCCESS ) {
 592                                         SlapReply rs;
 593                                         rc = ldap_parse_result( ld, res, &rs.sr_err,
 594                                                 NULL, NULL, NULL, NULL, 1 );
 595                                         if ( rc != LDAP_SUCCESS ) {
 596                                                 rs.sr_err = rc;
 597                                         }
 598                                         rc = slap_map_api2result( &rs );
 599                                         res = NULL;
 600
 601                                         /* FIXME: in case a referral
 602                                          * is returned, should we try
 603                                          * using it instead of the
 604                                          * configured URI? */
 605                                         if ( rc == LDAP_SUCCESS ) {
 606                                                 rc = ldap_install_tls( ld );
 607
 608                                         } else if ( rc == LDAP_REFERRAL ) {
 609                                                 rc = LDAP_UNWILLING_TO_PERFORM;
 610                                                 *text = "unwilling to chase referral returned by Start TLS exop";
 611                                         }
 612
 613                                         if ( data ) {
 614                                                 if ( data->bv_val ) {
 615                                                         ber_memfree( data->bv_val );
 616                                                 }
 617                                                 ber_memfree( data );
 618                                         }
 619                                 }
 620
 621                         } else {
 622                                 rc = LDAP_OTHER;
 623                         }
 624
 625                         if ( res != NULL ) {
 626                                 ldap_msgfree( res );
 627                         }
 628                 }
 629 #else /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 630                 /*
 631                  * use synchronous StartTLS
 632                  */
 633                 rc = ldap_start_tls_s( ld, NULL, NULL );
 634 #endif /* ! SLAP_STARTTLS_ASYNCHRONOUS */
 635
 636                 /* if StartTLS is requested, only attempt it if the URL
 637                  * is not "ldaps://"; this may occur not only in case
 638                  * of misconfiguration, but also when used in the chain
 639                  * overlay, where the "uri" can be parsed out of a referral */
 640                 switch ( rc ) {
 641                 case LDAP_SUCCESS:
 642                         *is_tls = 1;
 643                         break;
 644
 645                 case LDAP_SERVER_DOWN:
 646                         break;
 647
 648                 default:
 649                         if ( LDAP_BACK_TLS_CRITICAL_F( flags ) ) {
 650                                 *text = "could not start TLS";
 651                                 break;
 652                         }
 653
 654                         /* in case Start TLS is not critical */
 655                         *is_tls = 0;
 656                         rc = LDAP_SUCCESS;
 657                         break;
 658                 }
 659
 660         } else {
 661                 *is_tls = 0;
 662         }
 663
 664         return rc;
 665 }
 666 #endif /* HAVE_TLS */
 667
 668 static int
 669 ldap_back_prepare_conn( ldapconn_t *lc, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
 670 {
 671         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 672         int             version;
 673         LDAP            *ld = NULL;
 674 #ifdef HAVE_TLS
 675         int             is_tls = op->o_conn->c_is_tls;
 676         int             flags = li->li_flags;
 677         time_t          lctime = (time_t)(-1);
 678         slap_bindconf *sb;
 679 #endif /* HAVE_TLS */
 680
 681         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 682         rs->sr_err = ldap_initialize( &ld, li->li_uri );
 683         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 684         if ( rs->sr_err != LDAP_SUCCESS ) {
 685                 goto error_return;
 686         }
 687
 688         if ( li->li_urllist_f ) {
 689                 ldap_set_urllist_proc( ld, li->li_urllist_f, li->li_urllist_p );
 690         }
 691
 692         /* Set LDAP version. This will always succeed: If the client
 693          * bound with a particular version, then so can we.
 694          */
 695         if ( li->li_version != 0 ) {
 696                 version = li->li_version;
 697
 698         } else if ( op->o_protocol != 0 ) {
 699                 version = op->o_protocol;
 700
 701         } else {
 702                 /* assume it's an internal op; set to LDAPv3 */
 703                 version = LDAP_VERSION3;
 704         }
 705         ldap_set_option( ld, LDAP_OPT_PROTOCOL_VERSION, (const void *)&version );
 706
 707         /* automatically chase referrals ("chase-referrals [{yes|no}]" statement) */
 708         ldap_set_option( ld, LDAP_OPT_REFERRALS,
 709                 LDAP_BACK_CHASE_REFERRALS( li ) ? LDAP_OPT_ON : LDAP_OPT_OFF );
 710
 711         if ( li->li_network_timeout > 0 ) {
 712                 struct timeval          tv;
 713
 714                 tv.tv_sec = li->li_network_timeout;
 715                 tv.tv_usec = 0;
 716                 ldap_set_option( ld, LDAP_OPT_NETWORK_TIMEOUT, (const void *)&tv );
 717         }
 718
 719         /* turn on network keepalive, if configured so */
 720         slap_client_keepalive(ld, &li->li_tls.sb_keepalive);
 721
 722 #ifdef HAVE_TLS
 723         if ( LDAP_BACK_CONN_ISPRIV( lc ) ) {
 724                 /* See "rationale" comment in ldap_back_getconn() */
 725                 if ( li->li_acl_authmethod == LDAP_AUTH_NONE &&
 726                          li->li_idassert_authmethod != LDAP_AUTH_NONE )
 727                         sb = &li->li_idassert.si_bc;
 728                 else
 729                         sb = &li->li_acl;
 730
 731         } else if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) {
 732                 sb = &li->li_idassert.si_bc;
 733
 734         } else {
 735                 sb = &li->li_tls;
 736         }
 737
 738         if ( sb->sb_tls_do_init ) {
 739                 bindconf_tls_set( sb, ld );
 740         } else if ( sb->sb_tls_ctx ) {
 741                 ldap_set_option( ld, LDAP_OPT_X_TLS_CTX, sb->sb_tls_ctx );
 742         }
 743
 744         /* if required by the bindconf configuration, force TLS */
 745         if ( ( sb == &li->li_acl || sb == &li->li_idassert.si_bc ) &&
 746                 sb->sb_tls_ctx )
 747         {
 748                 flags |= LDAP_BACK_F_USE_TLS;
 749         }
 750
 751         ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
 752         assert( li->li_uri_mutex_do_not_lock == 0 );
 753         li->li_uri_mutex_do_not_lock = 1;
 754         rs->sr_err = ldap_back_start_tls( ld, op->o_protocol, &is_tls,
 755                         li->li_uri, flags, li->li_nretries, &rs->sr_text );
 756         li->li_uri_mutex_do_not_lock = 0;
 757         ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
 758         if ( rs->sr_err != LDAP_SUCCESS ) {
 759                 ldap_unbind_ext( ld, NULL, NULL );
 760                 rs->sr_text = "Start TLS failed";
 761                 goto error_return;
 762
 763         } else if ( li->li_idle_timeout ) {
 764                 /* only touch when activity actually took place... */
 765                 lctime = op->o_time;
 766         }
 767 #endif /* HAVE_TLS */
 768
 769         lc->lc_ld = ld;
 770         lc->lc_refcnt = 1;
 771 #ifdef HAVE_TLS
 772         if ( is_tls ) {
 773                 LDAP_BACK_CONN_ISTLS_SET( lc );
 774         } else {
 775                 LDAP_BACK_CONN_ISTLS_CLEAR( lc );
 776         }
 777         if ( lctime != (time_t)(-1) ) {
 778                 lc->lc_time = lctime;
 779         }
 780 #endif /* HAVE_TLS */
 781
 782 error_return:;
 783         if ( rs->sr_err != LDAP_SUCCESS ) {
 784                 rs->sr_err = slap_map_api2result( rs );
 785                 if ( sendok & LDAP_BACK_SENDERR ) {
 786                         if ( rs->sr_text == NULL ) {
 787                                 rs->sr_text = "Proxy connection initialization failed";
 788                         }
 789                         send_ldap_result( op, rs );
 790                 }
 791
 792         } else {
 793                 if ( li->li_conn_ttl > 0 ) {
 794                         lc->lc_create_time = op->o_time;
 795                 }
 796         }
 797
 798         return rs->sr_err;
 799 }
 800
 801 static ldapconn_t *
 802 ldap_back_getconn(
 803         Operation               *op,
 804         SlapReply               *rs,
 805         ldap_back_send_t        sendok,
 806         struct berval           *binddn,
 807         struct berval           *bindcred )
 808 {
 809         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
 810         ldapconn_t      *lc = NULL,
 811                         lc_curr = {{ 0 }};
 812         int             refcnt = 1,
 813                         lookupconn = !( sendok & LDAP_BACK_BINDING );
 814
 815         /* if the server is quarantined, and
 816          * - the current interval did not expire yet, or
 817          * - no more retries should occur,
 818          * don't return the connection */
 819         if ( li->li_isquarantined ) {
 820                 slap_retry_info_t       *ri = &li->li_quarantine;
 821                 int                     dont_retry = 1;
 822
 823                 if ( li->li_quarantine.ri_interval ) {
 824                         ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex );
 825                         if ( li->li_isquarantined == LDAP_BACK_FQ_YES ) {
 826                                 dont_retry = ( ri->ri_num[ ri->ri_idx ] == SLAP_RETRYNUM_TAIL
 827                                         || slap_get_time() < ri->ri_last + ri->ri_interval[ ri->ri_idx ] );
 828                                 if ( !dont_retry ) {
 829                                         Debug( LDAP_DEBUG_ANY,
 830                                                 "%s: ldap_back_getconn quarantine "
 831                                                 "retry block #%d try #%d.\n",
 832                                                 op->o_log_prefix, ri->ri_idx, ri->ri_count );
 833                                         li->li_isquarantined = LDAP_BACK_FQ_RETRYING;
 834                                 }
 835                         }
 836                         ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex );
 837                 }
 838
 839                 if ( dont_retry ) {
 840                         rs->sr_err = LDAP_UNAVAILABLE;
 841                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
 842                                 rs->sr_text = "Target is quarantined";
 843                                 send_ldap_result( op, rs );
 844                         }
 845                         return NULL;
 846                 }
 847         }
 848
 849         /* Internal searches are privileged and shared. So is root. */
 850         if ( op->o_do_not_cache || be_isroot( op ) ) {
 851                 LDAP_BACK_CONN_ISPRIV_SET( &lc_curr );
 852                 lc_curr.lc_local_ndn = op->o_bd->be_rootndn;
 853                 LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op );
 854
 855         } else {
 856                 struct berval   tmpbinddn,
 857                                 tmpbindcred,
 858                                 save_o_dn,
 859                                 save_o_ndn;
 860                 int             isproxyauthz;
 861
 862                 /* need cleanup */
 863                 if ( binddn == NULL ) {
 864                         binddn = &tmpbinddn;
 865                 }
 866                 if ( bindcred == NULL ) {
 867                         bindcred = &tmpbindcred;
 868                 }
 869                 if ( op->o_tag == LDAP_REQ_BIND ) {
 870                         save_o_dn = op->o_dn;
 871                         save_o_ndn = op->o_ndn;
 872                         op->o_dn = op->o_req_dn;
 873                         op->o_ndn = op->o_req_ndn;
 874                 }
 875                 isproxyauthz = ldap_back_is_proxy_authz( op, rs, sendok, binddn, bindcred );
 876                 if ( op->o_tag == LDAP_REQ_BIND ) {
 877                         op->o_dn = save_o_dn;
 878                         op->o_ndn = save_o_ndn;
 879                 }
 880                 if ( isproxyauthz == -1 ) {
 881                         return NULL;
 882                 }
 883
 884                 lc_curr.lc_local_ndn = op->o_ndn;
 885                 /* Explicit binds must not be shared;
 886                  * however, explicit binds are piped in a special connection
 887                  * when idassert is to occur with "override" set */
 888                 if ( op->o_tag == LDAP_REQ_BIND && !isproxyauthz ) {
 889                         lc_curr.lc_conn = op->o_conn;
 890
 891                 } else {
 892                         if ( isproxyauthz && !( sendok & LDAP_BACK_BINDING ) ) {
 893                                 lc_curr.lc_local_ndn = *binddn;
 894                                 LDAP_BACK_PCONN_ROOTDN_SET( &lc_curr, op );
 895                                 LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr );
 896
 897                         } else if ( isproxyauthz && ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) ) {
 898                                 lc_curr.lc_local_ndn = slap_empty_bv;
 899                                 LDAP_BACK_PCONN_BIND_SET( &lc_curr, op );
 900                                 LDAP_BACK_CONN_ISIDASSERT_SET( &lc_curr );
 901                                 lookupconn = 1;
 902
 903                         } else if ( SLAP_IS_AUTHZ_BACKEND( op ) ) {
 904                                 lc_curr.lc_conn = op->o_conn;
 905
 906                         } else {
 907                                 LDAP_BACK_PCONN_ANON_SET( &lc_curr, op );
 908                         }
 909                 }
 910         }
 911
 912         /* Explicit Bind requests always get their own conn */
 913         if ( lookupconn ) {
 914 retry_lock:
 915                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
 916                 if ( LDAP_BACK_PCONN_ISPRIV( &lc_curr ) ) {
 917                         /* lookup a conn that's not binding */
 918                         LDAP_TAILQ_FOREACH( lc,
 919                                 &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv,
 920                                 lc_q )
 921                         {
 922                                 if ( !LDAP_BACK_CONN_BINDING( lc ) && lc->lc_refcnt == 0 ) {
 923                                         break;
 924                                 }
 925                         }
 926
 927                         if ( lc != NULL ) {
 928                                 if ( lc != LDAP_TAILQ_LAST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 929                                         ldapconn_t, lc_q ) )
 930                                 {
 931                                         LDAP_TAILQ_REMOVE( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 932                                                 lc, lc_q );
 933                                         LDAP_TAILQ_ENTRY_INIT( lc, lc_q );
 934                                         LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv,
 935                                                 lc, lc_q );
 936                                 }
 937
 938                         } else if ( !LDAP_BACK_USE_TEMPORARIES( li )
 939                                 && li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_num == li->li_conn_priv_max )
 940                         {
 941                                 lc = LDAP_TAILQ_FIRST( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( &lc_curr ) ].lic_priv );
 942                         }
 943
 944                 } else {
 945
 946                         /* Searches for a ldapconn in the avl tree */
 947                         lc = (ldapconn_t *)avl_find( li->li_conninfo.lai_tree,
 948                                         (caddr_t)&lc_curr, ldap_back_conndn_cmp );
 949                 }
 950
 951                 if ( lc != NULL ) {
 952                         /* Don't reuse connections while they're still binding */
 953                         if ( LDAP_BACK_CONN_BINDING( lc ) ) {
 954                                 if ( !LDAP_BACK_USE_TEMPORARIES( li ) ) {
 955                                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 956
 957                                         ldap_pvt_thread_yield();
 958                                         goto retry_lock;
 959                                 }
 960                                 lc = NULL;
 961                         }
 962
 963                         if ( lc != NULL ) {
 964                                 if ( op->o_tag == LDAP_REQ_BIND ) {
 965                                         /* right now, this is the only possible case */
 966                                         assert( ( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE ) );
 967                                         LDAP_BACK_CONN_BINDING_SET( lc );
 968                                 }
 969
 970                                 refcnt = ++lc->lc_refcnt;
 971                         }
 972                 }
 973                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
 974         }
 975
 976         /* Looks like we didn't get a bind. Open a new session... */
 977         if ( lc == NULL ) {
 978                 lc = (ldapconn_t *)ch_calloc( 1, sizeof( ldapconn_t ) );
 979                 lc->lc_flags = li->li_flags;
 980                 lc->lc_lcflags = lc_curr.lc_lcflags;
 981                 if ( ldap_back_prepare_conn( lc, op, rs, sendok ) != LDAP_SUCCESS ) {
 982                         ch_free( lc );
 983                         return NULL;
 984                 }
 985
 986                 if ( sendok & LDAP_BACK_BINDING ) {
 987                         LDAP_BACK_CONN_BINDING_SET( lc );
 988                 }
 989
 990                 lc->lc_conn = lc_curr.lc_conn;
 991                 ber_dupbv( &lc->lc_local_ndn, &lc_curr.lc_local_ndn );
 992
 993                 /*
 994                  * the rationale is: connections as the rootdn are privileged,
 995                  * so li_acl is to be used; however, in some cases
 996                  * one already configured identity assertion with a highly
 997                  * privileged idassert_authcDN, so if li_acl is not configured
 998                  * and idassert is, use idassert instead.
 999                  *
1000                  * might change in the future, because it's preferable
1001                  * to make clear what identity is being used, since
1002                  * the only drawback is that one risks to configure
1003                  * the same identity twice...
1004                  */
1005                 if ( LDAP_BACK_CONN_ISPRIV( &lc_curr ) ) {
1006                         if ( li->li_acl_authmethod == LDAP_AUTH_NONE &&
1007                                  li->li_idassert_authmethod != LDAP_AUTH_NONE ) {
1008                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN );
1009                                 ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd );
1010
1011                         } else {
1012                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_acl_authcDN );
1013                                 ber_dupbv( &lc->lc_cred, &li->li_acl_passwd );
1014                         }
1015                         LDAP_BACK_CONN_ISPRIV_SET( lc );
1016
1017                 } else if ( LDAP_BACK_CONN_ISIDASSERT( &lc_curr ) ) {
1018                         if ( !LDAP_BACK_PCONN_ISBIND( &lc_curr ) ) {
1019                                 ber_dupbv( &lc->lc_bound_ndn, &li->li_idassert_authcDN );
1020                                 ber_dupbv( &lc->lc_cred, &li->li_idassert_passwd );
1021                         }
1022                         LDAP_BACK_CONN_ISIDASSERT_SET( lc );
1023
1024                 } else {
1025                         BER_BVZERO( &lc->lc_cred );
1026                         BER_BVZERO( &lc->lc_bound_ndn );
1027                         if ( !BER_BVISEMPTY( &op->o_ndn )
1028                                 && SLAP_IS_AUTHZ_BACKEND( op ) )
1029                         {
1030                                 ber_dupbv( &lc->lc_bound_ndn, &op->o_ndn );
1031                         }
1032                 }
1033
1034 #ifdef HAVE_TLS
1035                 /* if start TLS failed but it was not mandatory,
1036                  * check if the non-TLS connection was already
1037                  * in cache; in case, destroy the newly created
1038                  * connection and use the existing one */
1039                 if ( LDAP_BACK_PCONN_ISTLS( lc )
1040                                 && !ldap_tls_inplace( lc->lc_ld ) )
1041                 {
1042                         ldapconn_t      *tmplc = NULL;
1043                         int             idx = LDAP_BACK_CONN2PRIV( &lc_curr ) - 1;
1044
1045                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1046                         LDAP_TAILQ_FOREACH( tmplc,
1047                                 &li->li_conn_priv[ idx ].lic_priv,
1048                                 lc_q )
1049                         {
1050                                 if ( !LDAP_BACK_CONN_BINDING( tmplc ) ) {
1051                                         break;
1052                                 }
1053                         }
1054
1055                         if ( tmplc != NULL ) {
1056                                 refcnt = ++tmplc->lc_refcnt;
1057                                 ldap_back_conn_free( lc );
1058                                 lc = tmplc;
1059                         }
1060                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1061
1062                         if ( tmplc != NULL ) {
1063                                 goto done;
1064                         }
1065                 }
1066 #endif /* HAVE_TLS */
1067
1068                 /* Inserts the newly created ldapconn in the avl tree */
1069                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1070
1071                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1072                 lc->lc_connid = li->li_conn_nextid++;
1073
1074                 assert( lc->lc_refcnt == 1 );
1075
1076 #if LDAP_BACK_PRINT_CONNTREE > 0
1077                 ldap_back_print_conntree( li, ">>> ldap_back_getconn(insert)" );
1078 #endif /* LDAP_BACK_PRINT_CONNTREE */
1079
1080                 if ( LDAP_BACK_PCONN_ISPRIV( lc ) ) {
1081                         if ( li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num < li->li_conn_priv_max ) {
1082                                 LDAP_TAILQ_INSERT_TAIL( &li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_priv, lc, lc_q );
1083                                 li->li_conn_priv[ LDAP_BACK_CONN2PRIV( lc ) ].lic_num++;
1084                                 LDAP_BACK_CONN_CACHED_SET( lc );
1085
1086                         } else {
1087                                 LDAP_BACK_CONN_TAINTED_SET( lc );
1088                         }
1089                         rs->sr_err = 0;
1090
1091                 } else {
1092                         rs->sr_err = avl_insert( &li->li_conninfo.lai_tree, (caddr_t)lc,
1093                                 ldap_back_conndn_cmp, ldap_back_conndn_dup );
1094                         LDAP_BACK_CONN_CACHED_SET( lc );
1095                 }
1096
1097 #if LDAP_BACK_PRINT_CONNTREE > 0
1098                 ldap_back_print_conntree( li, "<<< ldap_back_getconn(insert)" );
1099 #endif /* LDAP_BACK_PRINT_CONNTREE */
1100
1101                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1102
1103                 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1104                         char    buf[ SLAP_TEXT_BUFLEN ];
1105
1106                         snprintf( buf, sizeof( buf ),
1107                                 "lc=%p inserted refcnt=%u rc=%d",
1108                                 (void *)lc, refcnt, rs->sr_err );
1109
1110                         Debug( LDAP_DEBUG_TRACE,
1111                                 "=>ldap_back_getconn: %s: %s\n",
1112                                 op->o_log_prefix, buf, 0 );
1113                 }
1114
1115                 if ( !LDAP_BACK_PCONN_ISPRIV( lc ) ) {
1116                         /* Err could be -1 in case a duplicate ldapconn is inserted */
1117                         switch ( rs->sr_err ) {
1118                         case 0:
1119                                 break;
1120
1121                         case -1:
1122                                 LDAP_BACK_CONN_CACHED_CLEAR( lc );
1123                                 if ( !( sendok & LDAP_BACK_BINDING ) && !LDAP_BACK_USE_TEMPORARIES( li ) ) {
1124                                         /* duplicate: free and try to get the newly created one */
1125                                         ldap_back_conn_free( lc );
1126                                         lc = NULL;
1127                                         goto retry_lock;
1128                                 }
1129
1130                                 /* taint connection, so that it'll be freed when released */
1131                                 LDAP_BACK_CONN_TAINTED_SET( lc );
1132                                 break;
1133
1134                         default:
1135                                 LDAP_BACK_CONN_CACHED_CLEAR( lc );
1136                                 ldap_back_conn_free( lc );
1137                                 rs->sr_err = LDAP_OTHER;
1138                                 rs->sr_text = "Proxy bind collision";
1139                                 if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1140                                         send_ldap_result( op, rs );
1141                                 }
1142                                 return NULL;
1143                         }
1144                 }
1145
1146         } else {
1147                 int     expiring = 0;
1148
1149                 if ( ( li->li_idle_timeout != 0 && op->o_time > lc->lc_time + li->li_idle_timeout )
1150                         || ( li->li_conn_ttl != 0 && op->o_time > lc->lc_create_time + li->li_conn_ttl ) )
1151                 {
1152                         expiring = 1;
1153
1154                         /* let it be used, but taint/delete it so that
1155                          * no-one else can look it up any further */
1156                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1157
1158 #if LDAP_BACK_PRINT_CONNTREE > 0
1159                         ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" );
1160 #endif /* LDAP_BACK_PRINT_CONNTREE */
1161
1162                         (void)ldap_back_conn_delete( li, lc );
1163                         LDAP_BACK_CONN_TAINTED_SET( lc );
1164
1165 #if LDAP_BACK_PRINT_CONNTREE > 0
1166                         ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" );
1167 #endif /* LDAP_BACK_PRINT_CONNTREE */
1168
1169                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1170                 }
1171
1172                 if ( LogTest( LDAP_DEBUG_TRACE ) ) {
1173                         char    buf[ SLAP_TEXT_BUFLEN ];
1174
1175                         snprintf( buf, sizeof( buf ),
1176                                 "conn %p fetched refcnt=%u%s",
1177                                 (void *)lc, refcnt,
1178                                 expiring ? " expiring" : "" );
1179                         Debug( LDAP_DEBUG_TRACE,
1180                                 "=>ldap_back_getconn: %s.\n", buf, 0, 0 );
1181                 }
1182         }
1183
1184 #ifdef HAVE_TLS
1185 done:;
1186 #endif /* HAVE_TLS */
1187
1188         return lc;
1189 }
1190
1191 void
1192 ldap_back_release_conn_lock(
1193         ldapinfo_t              *li,
1194         ldapconn_t              **lcp,
1195         int                     dolock )
1196 {
1197
1198         ldapconn_t      *lc = *lcp;
1199
1200         if ( dolock ) {
1201                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1202         }
1203         assert( lc->lc_refcnt > 0 );
1204         LDAP_BACK_CONN_BINDING_CLEAR( lc );
1205         lc->lc_refcnt--;
1206         if ( LDAP_BACK_CONN_TAINTED( lc ) ) {
1207                 ldap_back_freeconn( li, lc, 0 );
1208                 *lcp = NULL;
1209         }
1210         if ( dolock ) {
1211                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1212         }
1213 }
1214
1215 void
1216 ldap_back_quarantine(
1217         Operation       *op,
1218         SlapReply       *rs )
1219 {
1220         ldapinfo_t              *li = (ldapinfo_t *)op->o_bd->be_private;
1221
1222         slap_retry_info_t       *ri = &li->li_quarantine;
1223
1224         ldap_pvt_thread_mutex_lock( &li->li_quarantine_mutex );
1225
1226         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1227                 time_t          new_last = slap_get_time();
1228
1229                 switch ( li->li_isquarantined ) {
1230                 case LDAP_BACK_FQ_NO:
1231                         if ( ri->ri_last == new_last ) {
1232                                 goto done;
1233                         }
1234
1235                         Debug( LDAP_DEBUG_ANY,
1236                                 "%s: ldap_back_quarantine enter.\n",
1237                                 op->o_log_prefix, 0, 0 );
1238
1239                         ri->ri_idx = 0;
1240                         ri->ri_count = 0;
1241                         break;
1242
1243                 case LDAP_BACK_FQ_RETRYING:
1244                         Debug( LDAP_DEBUG_ANY,
1245                                 "%s: ldap_back_quarantine block #%d try #%d failed.\n",
1246                                 op->o_log_prefix, ri->ri_idx, ri->ri_count );
1247
1248                         ++ri->ri_count;
1249                         if ( ri->ri_num[ ri->ri_idx ] != SLAP_RETRYNUM_FOREVER
1250                                 && ri->ri_count == ri->ri_num[ ri->ri_idx ] )
1251                         {
1252                                 ri->ri_count = 0;
1253                                 ++ri->ri_idx;
1254                         }
1255                         break;
1256
1257                 default:
1258                         break;
1259                 }
1260
1261                 li->li_isquarantined = LDAP_BACK_FQ_YES;
1262                 ri->ri_last = new_last;
1263
1264         } else if ( li->li_isquarantined != LDAP_BACK_FQ_NO ) {
1265                 if ( ri->ri_last == slap_get_time() ) {
1266                         goto done;
1267                 }
1268
1269                 Debug( LDAP_DEBUG_ANY,
1270                         "%s: ldap_back_quarantine exit (%d) err=%d.\n",
1271                         op->o_log_prefix, li->li_isquarantined, rs->sr_err );
1272
1273                 if ( li->li_quarantine_f ) {
1274                         (void)li->li_quarantine_f( li, li->li_quarantine_p );
1275                 }
1276
1277                 ri->ri_count = 0;
1278                 ri->ri_idx = 0;
1279                 li->li_isquarantined = LDAP_BACK_FQ_NO;
1280         }
1281
1282 done:;
1283         ldap_pvt_thread_mutex_unlock( &li->li_quarantine_mutex );
1284 }
1285
1286 static int
1287 ldap_back_dobind_cb(
1288         Operation *op,
1289         SlapReply *rs
1290 )
1291 {
1292         ber_tag_t *tptr = op->o_callback->sc_private;
1293         op->o_tag = *tptr;
1294         rs->sr_tag = slap_req2res( op->o_tag );
1295
1296         return SLAP_CB_CONTINUE;
1297 }
1298
1299 /*
1300  * ldap_back_dobind_int
1301  *
1302  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
1303  */
1304 static int
1305 ldap_back_dobind_int(
1306         ldapconn_t              **lcp,
1307         Operation               *op,
1308         SlapReply               *rs,
1309         ldap_back_send_t        sendok,
1310         int                     retries,
1311         int                     dolock )
1312 {
1313         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1314
1315         ldapconn_t      *lc;
1316         struct berval   binddn = slap_empty_bv,
1317                         bindcred = slap_empty_bv;
1318
1319         int             rc = 0,
1320                         isbound,
1321                         binding = 0;
1322         ber_int_t       msgid;
1323         ber_tag_t       o_tag = op->o_tag;
1324         slap_callback cb = {0};
1325         char            *tmp_dn;
1326
1327         assert( lcp != NULL );
1328         assert( retries >= 0 );
1329
1330         if ( sendok & LDAP_BACK_GETCONN ) {
1331                 assert( *lcp == NULL );
1332
1333                 lc = ldap_back_getconn( op, rs, sendok, &binddn, &bindcred );
1334                 if ( lc == NULL ) {
1335                         return 0;
1336                 }
1337                 *lcp = lc;
1338
1339         } else {
1340                 lc = *lcp;
1341         }
1342
1343         assert( lc != NULL );
1344
1345 retry_lock:;
1346         if ( dolock ) {
1347                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1348         }
1349
1350         if ( binding == 0 ) {
1351                 /* check if already bound */
1352                 rc = isbound = LDAP_BACK_CONN_ISBOUND( lc );
1353                 if ( isbound ) {
1354                         if ( dolock ) {
1355                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1356                         }
1357                         return rc;
1358                 }
1359
1360                 if ( LDAP_BACK_CONN_BINDING( lc ) ) {
1361                         /* if someone else is about to bind it, give up and retry */
1362                         if ( dolock ) {
1363                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1364                         }
1365                         ldap_pvt_thread_yield();
1366                         goto retry_lock;
1367
1368                 } else {
1369                         /* otherwise this thread will bind it */
1370                         LDAP_BACK_CONN_BINDING_SET( lc );
1371                         binding = 1;
1372                 }
1373         }
1374
1375         if ( dolock ) {
1376                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1377         }
1378
1379         /*
1380          * FIXME: we need to let clients use proxyAuthz
1381          * otherwise we cannot do symmetric pools of servers;
1382          * we have to live with the fact that a user can
1383          * authorize itself as any ID that is allowed
1384          * by the authzTo directive of the "proxyauthzdn".
1385          */
1386         /*
1387          * NOTE: current Proxy Authorization specification
1388          * and implementation do not allow proxy authorization
1389          * control to be provided with Bind requests
1390          */
1391         /*
1392          * if no bind took place yet, but the connection is bound
1393          * and the "idassert-authcDN" (or other ID) is set,
1394          * then bind as the asserting identity and explicitly
1395          * add the proxyAuthz control to every operation with the
1396          * dn bound to the connection as control value.
1397          * This is done also if this is the authorizing backend,
1398          * but the "override" flag is given to idassert.
1399          * It allows to use SASL bind and yet proxyAuthz users
1400          */
1401         op->o_tag = LDAP_REQ_BIND;
1402         cb.sc_next = op->o_callback;
1403         cb.sc_private = &o_tag;
1404         cb.sc_response = ldap_back_dobind_cb;
1405         op->o_callback = &cb;
1406
1407         if ( LDAP_BACK_CONN_ISIDASSERT( lc ) ) {
1408                 if ( BER_BVISEMPTY( &binddn ) && BER_BVISEMPTY( &bindcred ) ) {
1409                         /* if we got here, it shouldn't return result */
1410                         rc = ldap_back_is_proxy_authz( op, rs,
1411                                 LDAP_BACK_DONTSEND, &binddn, &bindcred );
1412                         if ( rc != 1 ) {
1413                                 Debug( LDAP_DEBUG_ANY, "Error: ldap_back_is_proxy_authz "
1414                                         "returned %d, misconfigured URI?\n", rc, 0, 0 );
1415                                 rs->sr_err = LDAP_OTHER;
1416                                 rs->sr_text = "misconfigured URI?";
1417                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1418                                 if ( sendok & LDAP_BACK_SENDERR ) {
1419                                         send_ldap_result( op, rs );
1420                                 }
1421                                 goto done;
1422                         }
1423                 }
1424                 rc = ldap_back_proxy_authz_bind( lc, op, rs, sendok, &binddn, &bindcred );
1425                 goto done;
1426         }
1427
1428 #ifdef HAVE_CYRUS_SASL
1429         if ( LDAP_BACK_CONN_ISPRIV( lc )) {
1430         slap_bindconf *sb;
1431         if ( li->li_acl_authmethod != LDAP_AUTH_NONE )
1432                 sb = &li->li_acl;
1433         else
1434                 sb = &li->li_idassert.si_bc;
1435
1436         if ( sb->sb_method == LDAP_AUTH_SASL ) {
1437                 void            *defaults = NULL;
1438
1439                 if ( sb->sb_secprops != NULL ) {
1440                         rc = ldap_set_option( lc->lc_ld,
1441                                 LDAP_OPT_X_SASL_SECPROPS, sb->sb_secprops );
1442
1443                         if ( rc != LDAP_OPT_SUCCESS ) {
1444                                 Debug( LDAP_DEBUG_ANY, "Error: ldap_set_option "
1445                                         "(SECPROPS,\"%s\") failed!\n",
1446                                         sb->sb_secprops, 0, 0 );
1447                                 goto done;
1448                         }
1449                 }
1450
1451                 defaults = lutil_sasl_defaults( lc->lc_ld,
1452                                 sb->sb_saslmech.bv_val,
1453                                 sb->sb_realm.bv_val,
1454                                 sb->sb_authcId.bv_val,
1455                                 sb->sb_cred.bv_val,
1456                                 NULL );
1457                 if ( defaults == NULL ) {
1458                         rs->sr_err = LDAP_OTHER;
1459                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1460                         if ( sendok & LDAP_BACK_SENDERR ) {
1461                                 send_ldap_result( op, rs );
1462                         }
1463                         goto done;
1464                 }
1465
1466                 rs->sr_err = ldap_sasl_interactive_bind_s( lc->lc_ld,
1467                                 sb->sb_binddn.bv_val,
1468                                 sb->sb_saslmech.bv_val, NULL, NULL,
1469                                 LDAP_SASL_QUIET, lutil_sasl_interact,
1470                                 defaults );
1471
1472                 ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
1473                 ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
1474                 ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
1475
1476                 lutil_sasl_freedefs( defaults );
1477
1478                 switch ( rs->sr_err ) {
1479                 case LDAP_SUCCESS:
1480                         LDAP_BACK_CONN_ISBOUND_SET( lc );
1481                         break;
1482
1483                 case LDAP_LOCAL_ERROR:
1484                         /* list client API error codes that require
1485                          * to taint the connection */
1486                         /* FIXME: should actually retry? */
1487                         LDAP_BACK_CONN_TAINTED_SET( lc );
1488
1489                         /* fallthru */
1490
1491                 default:
1492                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
1493                         rs->sr_err = slap_map_api2result( rs );
1494                         if ( sendok & LDAP_BACK_SENDERR ) {
1495                                 send_ldap_result( op, rs );
1496                         }
1497                         break;
1498                 }
1499
1500                 if ( LDAP_BACK_QUARANTINE( li ) ) {
1501                         ldap_back_quarantine( op, rs );
1502                 }
1503
1504                 goto done;
1505         }
1506         }
1507 #endif /* HAVE_CYRUS_SASL */
1508
1509 retry:;
1510         if ( BER_BVISNULL( &lc->lc_cred ) ) {
1511                 tmp_dn = "";
1512                 if ( !BER_BVISNULL( &lc->lc_bound_ndn ) && !BER_BVISEMPTY( &lc->lc_bound_ndn ) ) {
1513                         Debug( LDAP_DEBUG_ANY, "%s ldap_back_dobind_int: DN=\"%s\" without creds, binding anonymously",
1514                                 op->o_log_prefix, lc->lc_bound_ndn.bv_val, 0 );
1515                 }
1516
1517         } else {
1518                 tmp_dn = lc->lc_bound_ndn.bv_val;
1519         }
1520         rs->sr_err = ldap_sasl_bind( lc->lc_ld,
1521                         tmp_dn,
1522                         LDAP_SASL_SIMPLE, &lc->lc_cred,
1523                         NULL, NULL, &msgid );
1524
1525         ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
1526         ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
1527         ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
1528
1529         if ( rs->sr_err == LDAP_SERVER_DOWN ) {
1530                 if ( retries != LDAP_BACK_RETRY_NEVER ) {
1531                         if ( dolock ) {
1532                                 ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1533                         }
1534
1535                         assert( lc->lc_refcnt > 0 );
1536                         if ( lc->lc_refcnt == 1 ) {
1537                                 ldap_unbind_ext( lc->lc_ld, NULL, NULL );
1538                                 lc->lc_ld = NULL;
1539
1540                                 /* lc here must be the regular lc, reset and ready for init */
1541                                 rs->sr_err = ldap_back_prepare_conn( lc, op, rs, sendok );
1542                                 if ( rs->sr_err != LDAP_SUCCESS ) {
1543                                         sendok &= ~LDAP_BACK_SENDERR;
1544                                         lc->lc_refcnt = 0;
1545                                 }
1546                         }
1547
1548                         if ( dolock ) {
1549                                 ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1550                         }
1551
1552                         if ( rs->sr_err == LDAP_SUCCESS ) {
1553                                 if ( retries > 0 ) {
1554                                         retries--;
1555                                 }
1556                                 goto retry;
1557                         }
1558                 }
1559
1560                 assert( lc->lc_refcnt == 1 );
1561                 lc->lc_refcnt = 0;
1562                 ldap_back_freeconn( li, lc, dolock );
1563                 *lcp = NULL;
1564                 rs->sr_err = slap_map_api2result( rs );
1565
1566                 if ( LDAP_BACK_QUARANTINE( li ) ) {
1567                         ldap_back_quarantine( op, rs );
1568                 }
1569
1570                 if ( rs->sr_err != LDAP_SUCCESS &&
1571                         ( sendok & LDAP_BACK_SENDERR ) )
1572                 {
1573                         if ( op->o_callback == &cb )
1574                                 op->o_callback = cb.sc_next;
1575                         op->o_tag = o_tag;
1576                         rs->sr_text = "Proxy can't contact remote server";
1577                         send_ldap_result( op, rs );
1578                 }
1579
1580                 rc = 0;
1581                 goto func_leave;
1582         }
1583
1584         rc = ldap_back_op_result( lc, op, rs, msgid,
1585                 -1, ( sendok | LDAP_BACK_BINDING ) );
1586         if ( rc == LDAP_SUCCESS ) {
1587                 LDAP_BACK_CONN_ISBOUND_SET( lc );
1588         }
1589
1590 done:;
1591         LDAP_BACK_CONN_BINDING_CLEAR( lc );
1592         rc = LDAP_BACK_CONN_ISBOUND( lc );
1593         if ( !rc ) {
1594                 ldap_back_release_conn_lock( li, lcp, dolock );
1595
1596         } else if ( LDAP_BACK_SAVECRED( li ) ) {
1597                 ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
1598         }
1599
1600 func_leave:;
1601         if ( op->o_callback == &cb )
1602                 op->o_callback = cb.sc_next;
1603         op->o_tag = o_tag;
1604
1605         return rc;
1606 }
1607
1608 /*
1609  * ldap_back_dobind
1610  *
1611  * Note: dolock indicates whether li->li_conninfo.lai_mutex must be locked or not
1612  */
1613 int
1614 ldap_back_dobind( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
1615 {
1616         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1617
1618         return ldap_back_dobind_int( lcp, op, rs,
1619                 ( sendok | LDAP_BACK_GETCONN ), li->li_nretries, 1 );
1620 }
1621
1622 /*
1623  * ldap_back_default_rebind
1624  *
1625  * This is a callback used for chasing referrals using the same
1626  * credentials as the original user on this session.
1627  */
1628 int
1629 ldap_back_default_rebind( LDAP *ld, LDAP_CONST char *url, ber_tag_t request,
1630         ber_int_t msgid, void *params )
1631 {
1632         ldapconn_t      *lc = (ldapconn_t *)params;
1633
1634 #ifdef HAVE_TLS
1635         /* ... otherwise we couldn't get here */
1636         assert( lc != NULL );
1637
1638         if ( !ldap_tls_inplace( ld ) ) {
1639                 int             is_tls = LDAP_BACK_CONN_ISTLS( lc ),
1640                                 rc;
1641                 const char      *text = NULL;
1642
1643                 rc = ldap_back_start_tls( ld, 0, &is_tls, url, lc->lc_flags,
1644                         LDAP_BACK_RETRY_DEFAULT, &text );
1645                 if ( rc != LDAP_SUCCESS ) {
1646                         return rc;
1647                 }
1648         }
1649 #endif /* HAVE_TLS */
1650
1651         /* FIXME: add checks on the URL/identity? */
1652         /* TODO: would like to count this bind operation for monitoring
1653          * too, but where do we get the ldapinfo_t? */
1654
1655         return ldap_sasl_bind_s( ld,
1656                         BER_BVISNULL( &lc->lc_cred ) ? "" : lc->lc_bound_ndn.bv_val,
1657                         LDAP_SASL_SIMPLE, &lc->lc_cred, NULL, NULL, NULL );
1658 }
1659
1660 /*
1661  * ldap_back_default_urllist
1662  */
1663 int
1664 ldap_back_default_urllist(
1665         LDAP            *ld,
1666         LDAPURLDesc     **urllist,
1667         LDAPURLDesc     **url,
1668         void            *params )
1669 {
1670         ldapinfo_t      *li = (ldapinfo_t *)params;
1671         LDAPURLDesc     **urltail;
1672
1673         if ( urllist == url ) {
1674                 return LDAP_SUCCESS;
1675         }
1676
1677         for ( urltail = &(*url)->lud_next; *urltail; urltail = &(*urltail)->lud_next )
1678                 /* count */ ;
1679
1680         *urltail = *urllist;
1681         *urllist = *url;
1682         *url = NULL;
1683
1684         if ( !li->li_uri_mutex_do_not_lock ) {
1685                 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
1686         }
1687
1688         if ( li->li_uri ) {
1689                 ch_free( li->li_uri );
1690         }
1691
1692         ldap_get_option( ld, LDAP_OPT_URI, (void *)&li->li_uri );
1693
1694         if ( !li->li_uri_mutex_do_not_lock ) {
1695                 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
1696         }
1697
1698         return LDAP_SUCCESS;
1699 }
1700
1701 int
1702 ldap_back_cancel(
1703                 ldapconn_t              *lc,
1704                 Operation               *op,
1705                 SlapReply               *rs,
1706                 ber_int_t               msgid,
1707                 ldap_back_send_t        sendok )
1708 {
1709         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1710
1711         /* default behavior */
1712         if ( LDAP_BACK_ABANDON( li ) ) {
1713                 return ldap_abandon_ext( lc->lc_ld, msgid, NULL, NULL );
1714         }
1715
1716         if ( LDAP_BACK_IGNORE( li ) ) {
1717                 return ldap_pvt_discard( lc->lc_ld, msgid );
1718         }
1719
1720         if ( LDAP_BACK_CANCEL( li ) ) {
1721                 /* FIXME: asynchronous? */
1722                 return ldap_cancel_s( lc->lc_ld, msgid, NULL, NULL );
1723         }
1724
1725         assert( 0 );
1726
1727         return LDAP_OTHER;
1728 }
1729
1730 int
1731 ldap_back_op_result(
1732                 ldapconn_t              *lc,
1733                 Operation               *op,
1734                 SlapReply               *rs,
1735                 ber_int_t               msgid,
1736                 time_t                  timeout,
1737                 ldap_back_send_t        sendok )
1738 {
1739         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
1740
1741         char            *match = NULL;
1742         char            *text = NULL;
1743         char            **refs = NULL;
1744         LDAPControl     **ctrls = NULL;
1745
1746         rs->sr_text = NULL;
1747         rs->sr_matched = NULL;
1748         rs->sr_ref = NULL;
1749         rs->sr_ctrls = NULL;
1750
1751         /* if the error recorded in the reply corresponds
1752          * to a successful state, get the error from the
1753          * remote server response */
1754         if ( LDAP_ERR_OK( rs->sr_err ) ) {
1755                 int             rc;
1756                 struct timeval  tv;
1757                 LDAPMessage     *res = NULL;
1758                 time_t          stoptime = (time_t)(-1);
1759                 int             timeout_err = op->o_protocol >= LDAP_VERSION3 ?
1760                                         LDAP_ADMINLIMIT_EXCEEDED : LDAP_OTHER;
1761                 const char      *timeout_text = "Operation timed out";
1762
1763                 /* if timeout is not specified, compute and use
1764                  * the one specific to the ongoing operation */
1765                 if ( timeout == (time_t)(-1) ) {
1766                         slap_op_t       opidx = slap_req2op( op->o_tag );
1767
1768                         if ( opidx == SLAP_OP_SEARCH ) {
1769                                 if ( op->ors_tlimit <= 0 ) {
1770                                         timeout = 0;
1771
1772                                 } else {
1773                                         timeout = op->ors_tlimit;
1774                                         timeout_err = LDAP_TIMELIMIT_EXCEEDED;
1775                                         timeout_text = NULL;
1776                                 }
1777
1778                         } else {
1779                                 timeout = li->li_timeout[ opidx ];
1780                         }
1781                 }
1782
1783                 /* better than nothing :) */
1784                 if ( timeout == 0 ) {
1785                         if ( li->li_idle_timeout ) {
1786                                 timeout = li->li_idle_timeout;
1787
1788                         } else if ( li->li_conn_ttl ) {
1789                                 timeout = li->li_conn_ttl;
1790                         }
1791                 }
1792
1793                 if ( timeout ) {
1794                         stoptime = op->o_time + timeout;
1795                 }
1796
1797                 LDAP_BACK_TV_SET( &tv );
1798
1799 retry:;
1800                 /* if result parsing fails, note the failure reason */
1801                 rc = ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, &tv, &res );
1802                 switch ( rc ) {
1803                 case 0:
1804                         if ( timeout && slap_get_time() > stoptime ) {
1805                                 if ( sendok & LDAP_BACK_BINDING ) {
1806                                         ldap_unbind_ext( lc->lc_ld, NULL, NULL );
1807                                         lc->lc_ld = NULL;
1808
1809                                         /* let it be used, but taint/delete it so that
1810                                          * no-one else can look it up any further */
1811                                         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
1812
1813 #if LDAP_BACK_PRINT_CONNTREE > 0
1814                                         ldap_back_print_conntree( li, ">>> ldap_back_getconn(timeout)" );
1815 #endif /* LDAP_BACK_PRINT_CONNTREE */
1816
1817                                         (void)ldap_back_conn_delete( li, lc );
1818                                         LDAP_BACK_CONN_TAINTED_SET( lc );
1819
1820 #if LDAP_BACK_PRINT_CONNTREE > 0
1821                                         ldap_back_print_conntree( li, "<<< ldap_back_getconn(timeout)" );
1822 #endif /* LDAP_BACK_PRINT_CONNTREE */
1823                                         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
1824
1825                                 } else {
1826                                         (void)ldap_back_cancel( lc, op, rs, msgid, sendok );
1827                                 }
1828                                 rs->sr_err = timeout_err;
1829                                 rs->sr_text = timeout_text;
1830                                 break;
1831                         }
1832
1833                         /* timeout == 0 */
1834                         LDAP_BACK_TV_SET( &tv );
1835                         ldap_pvt_thread_yield();
1836                         goto retry;
1837
1838                 case -1:
1839                         ldap_get_option( lc->lc_ld, LDAP_OPT_ERROR_NUMBER,
1840                                         &rs->sr_err );
1841                         break;
1842
1843
1844                 /* otherwise get the result; if it is not
1845                  * LDAP_SUCCESS, record it in the reply
1846                  * structure (this includes
1847                  * LDAP_COMPARE_{TRUE|FALSE}) */
1848                 default:
1849                         /* only touch when activity actually took place... */
1850                         if ( li->li_idle_timeout && lc ) {
1851                                 lc->lc_time = op->o_time;
1852                         }
1853
1854                         rc = ldap_parse_result( lc->lc_ld, res, &rs->sr_err,
1855                                         &match, &text, &refs, &ctrls, 1 );
1856                         if ( rc == LDAP_SUCCESS ) {
1857                                 rs->sr_text = text;
1858                         } else {
1859                                 rs->sr_err = rc;
1860                         }
1861                         rs->sr_err = slap_map_api2result( rs );
1862
1863                         /* RFC 4511: referrals can only appear
1864                          * if result code is LDAP_REFERRAL */
1865                         if ( refs != NULL
1866                                 && refs[ 0 ] != NULL
1867                                 && refs[ 0 ][ 0 ] != '\0' )
1868                         {
1869                                 if ( rs->sr_err != LDAP_REFERRAL ) {
1870                                         Debug( LDAP_DEBUG_ANY,
1871                                                 "%s ldap_back_op_result: "
1872                                                 "got referrals with err=%d\n",
1873                                                 op->o_log_prefix,
1874                                                 rs->sr_err, 0 );
1875
1876                                 } else {
1877                                         int     i;
1878
1879                                         for ( i = 0; refs[ i ] != NULL; i++ )
1880                                                 /* count */ ;
1881                                         rs->sr_ref = op->o_tmpalloc( sizeof( struct berval ) * ( i + 1 ),
1882                                                 op->o_tmpmemctx );
1883                                         for ( i = 0; refs[ i ] != NULL; i++ ) {
1884                                                 ber_str2bv( refs[ i ], 0, 0, &rs->sr_ref[ i ] );
1885                                         }
1886                                         BER_BVZERO( &rs->sr_ref[ i ] );
1887                                 }
1888
1889                         } else if ( rs->sr_err == LDAP_REFERRAL ) {
1890                                 Debug( LDAP_DEBUG_ANY,
1891                                         "%s ldap_back_op_result: "
1892                                         "got err=%d with null "
1893                                         "or empty referrals\n",
1894                                         op->o_log_prefix,
1895                                         rs->sr_err, 0 );
1896
1897                                 rs->sr_err = LDAP_NO_SUCH_OBJECT;
1898                         }
1899
1900                         if ( ctrls != NULL ) {
1901                                 rs->sr_ctrls = ctrls;
1902                         }
1903                 }
1904         }
1905
1906         /* if the error in the reply structure is not
1907          * LDAP_SUCCESS, try to map it from client
1908          * to server error */
1909         if ( !LDAP_ERR_OK( rs->sr_err ) ) {
1910                 rs->sr_err = slap_map_api2result( rs );
1911
1912                 /* internal ops ( op->o_conn == NULL )
1913                  * must not reply to client */
1914                 if ( op->o_conn && !op->o_do_not_cache && match ) {
1915
1916                         /* record the (massaged) matched
1917                          * DN into the reply structure */
1918                         rs->sr_matched = match;
1919                 }
1920         }
1921
1922         if ( rs->sr_err == LDAP_UNAVAILABLE ) {
1923                 if ( !( sendok & LDAP_BACK_RETRYING ) ) {
1924                         if ( LDAP_BACK_QUARANTINE( li ) ) {
1925                                 ldap_back_quarantine( op, rs );
1926                         }
1927                         if ( op->o_conn && ( sendok & LDAP_BACK_SENDERR ) ) {
1928                                 if ( rs->sr_text == NULL ) rs->sr_text = "Proxy operation retry failed";
1929                                 send_ldap_result( op, rs );
1930                         }
1931                 }
1932
1933         } else if ( op->o_conn &&
1934                 ( ( ( sendok & LDAP_BACK_SENDOK ) && LDAP_ERR_OK( rs->sr_err ) )
1935                         || ( ( sendok & LDAP_BACK_SENDERR ) && !LDAP_ERR_OK( rs->sr_err ) ) ) )
1936         {
1937                 send_ldap_result( op, rs );
1938         }
1939
1940         if ( text ) {
1941                 ldap_memfree( text );
1942         }
1943         rs->sr_text = NULL;
1944
1945         /* there can't be refs with a (successful) bind */
1946         if ( rs->sr_ref ) {
1947                 op->o_tmpfree( rs->sr_ref, op->o_tmpmemctx );
1948                 rs->sr_ref = NULL;
1949         }
1950
1951         if ( refs ) {
1952                 ber_memvfree( (void **)refs );
1953         }
1954
1955         /* match should not be possible with a successful bind */
1956         if ( match ) {
1957                 if ( rs->sr_matched != match ) {
1958                         free( (char *)rs->sr_matched );
1959                 }
1960                 rs->sr_matched = NULL;
1961                 ldap_memfree( match );
1962         }
1963
1964         if ( ctrls != NULL ) {
1965                 if ( op->o_tag == LDAP_REQ_BIND && rs->sr_err == LDAP_SUCCESS ) {
1966                         int i;
1967
1968                         for ( i = 0; ctrls[i] != NULL; i++ );
1969
1970                         rs->sr_ctrls = op->o_tmpalloc( sizeof( LDAPControl * )*( i + 1 ),
1971                                 op->o_tmpmemctx );
1972                         for ( i = 0; ctrls[ i ] != NULL; i++ ) {
1973                                 char *ptr;
1974                                 ber_len_t oidlen = strlen( ctrls[i]->ldctl_oid );
1975                                 ber_len_t size = sizeof( LDAPControl )
1976                                         + oidlen + 1
1977                                         + ctrls[i]->ldctl_value.bv_len + 1;
1978
1979                                 rs->sr_ctrls[ i ] = op->o_tmpalloc( size, op->o_tmpmemctx );
1980                                 rs->sr_ctrls[ i ]->ldctl_oid = (char *)&rs->sr_ctrls[ i ][ 1 ];
1981                                 lutil_strcopy( rs->sr_ctrls[ i ]->ldctl_oid, ctrls[i]->ldctl_oid );
1982                                 rs->sr_ctrls[ i ]->ldctl_value.bv_val
1983                                                 = (char *)&rs->sr_ctrls[ i ]->ldctl_oid[oidlen + 1];
1984                                 rs->sr_ctrls[ i ]->ldctl_value.bv_len
1985                                         = ctrls[i]->ldctl_value.bv_len;
1986                                 ptr = lutil_memcopy( rs->sr_ctrls[ i ]->ldctl_value.bv_val,
1987                                         ctrls[i]->ldctl_value.bv_val, ctrls[i]->ldctl_value.bv_len );
1988                                 *ptr = '\0';
1989                         }
1990                         rs->sr_ctrls[ i ] = NULL;
1991                         rs->sr_flags |= REP_CTRLS_MUSTBEFREED;
1992
1993                 } else {
1994                         assert( rs->sr_ctrls != NULL );
1995                         rs->sr_ctrls = NULL;
1996                 }
1997
1998                 ldap_controls_free( ctrls );
1999         }
2000
2001         return( LDAP_ERR_OK( rs->sr_err ) ? LDAP_SUCCESS : rs->sr_err );
2002 }
2003
2004 /* return true if bound, false if failed */
2005 int
2006 ldap_back_retry( ldapconn_t **lcp, Operation *op, SlapReply *rs, ldap_back_send_t sendok )
2007 {
2008         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
2009         int             rc = 0;
2010
2011         assert( lcp != NULL );
2012         assert( *lcp != NULL );
2013
2014         ldap_pvt_thread_mutex_lock( &li->li_conninfo.lai_mutex );
2015
2016         if ( (*lcp)->lc_refcnt == 1 ) {
2017                 int binding = LDAP_BACK_CONN_BINDING( *lcp );
2018
2019                 ldap_pvt_thread_mutex_lock( &li->li_uri_mutex );
2020                 Debug( LDAP_DEBUG_ANY,
2021                         "%s ldap_back_retry: retrying URI=\"%s\" DN=\"%s\"\n",
2022                         op->o_log_prefix, li->li_uri,
2023                         BER_BVISNULL( &(*lcp)->lc_bound_ndn ) ?
2024                                 "" : (*lcp)->lc_bound_ndn.bv_val );
2025                 ldap_pvt_thread_mutex_unlock( &li->li_uri_mutex );
2026
2027                 ldap_unbind_ext( (*lcp)->lc_ld, NULL, NULL );
2028                 (*lcp)->lc_ld = NULL;
2029                 LDAP_BACK_CONN_ISBOUND_CLEAR( (*lcp) );
2030
2031                 /* lc here must be the regular lc, reset and ready for init */
2032                 rc = ldap_back_prepare_conn( *lcp, op, rs, sendok );
2033                 if ( rc != LDAP_SUCCESS ) {
2034                         /* freeit, because lc_refcnt == 1 */
2035                         (*lcp)->lc_refcnt = 0;
2036                         (void)ldap_back_freeconn( li, *lcp, 0 );
2037                         *lcp = NULL;
2038                         rc = 0;
2039
2040                 } else if ( ( sendok & LDAP_BACK_BINDING ) ) {
2041                         if ( binding ) {
2042                                 LDAP_BACK_CONN_BINDING_SET( *lcp );
2043                         }
2044                         rc = 1;
2045
2046                 } else {
2047                         rc = ldap_back_dobind_int( lcp, op, rs, sendok, 0, 0 );
2048                         if ( rc == 0 && *lcp != NULL ) {
2049                                 /* freeit, because lc_refcnt == 1 */
2050                                 (*lcp)->lc_refcnt = 0;
2051                                 LDAP_BACK_CONN_TAINTED_SET( *lcp );
2052                                 (void)ldap_back_freeconn( li, *lcp, 0 );
2053                                 *lcp = NULL;
2054                         }
2055                 }
2056
2057         } else {
2058                 Debug( LDAP_DEBUG_TRACE,
2059                         "ldap_back_retry: conn %p refcnt=%u unable to retry.\n",
2060                         (void *)(*lcp), (*lcp)->lc_refcnt, 0 );
2061
2062                 LDAP_BACK_CONN_TAINTED_SET( *lcp );
2063                 ldap_back_release_conn_lock( li, lcp, 0 );
2064                 assert( *lcp == NULL );
2065
2066                 if ( sendok & LDAP_BACK_SENDERR ) {
2067                         rs->sr_err = LDAP_UNAVAILABLE;
2068                         rs->sr_text = "Unable to retry";
2069                         send_ldap_result( op, rs );
2070                 }
2071         }
2072
2073         ldap_pvt_thread_mutex_unlock( &li->li_conninfo.lai_mutex );
2074
2075         return rc;
2076 }
2077
2078 static int
2079 ldap_back_is_proxy_authz( Operation *op, SlapReply *rs, ldap_back_send_t sendok,
2080         struct berval *binddn, struct berval *bindcred )
2081 {
2082         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
2083         struct berval   ndn;
2084         int             dobind = 0;
2085
2086         if ( op->o_conn == NULL || op->o_do_not_cache ) {
2087                 goto done;
2088         }
2089
2090         /* don't proxyAuthz if protocol is not LDAPv3 */
2091         switch ( li->li_version ) {
2092         case LDAP_VERSION3:
2093                 break;
2094
2095         case 0:
2096                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
2097                         break;
2098                 }
2099                 /* fall thru */
2100
2101         default:
2102                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2103                 if ( sendok & LDAP_BACK_SENDERR ) {
2104                         send_ldap_result( op, rs );
2105                         dobind = -1;
2106                 }
2107                 goto done;
2108         }
2109
2110         /* safe default */
2111         *binddn = slap_empty_bv;
2112         *bindcred = slap_empty_bv;
2113
2114         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
2115                 ndn = op->o_conn->c_ndn;
2116
2117         } else {
2118                 ndn = op->o_ndn;
2119         }
2120
2121         if ( !( li->li_idassert_flags & LDAP_BACK_AUTH_OVERRIDE )) {
2122                 if ( op->o_tag == LDAP_REQ_BIND ) {
2123                         if ( !BER_BVISEMPTY( &ndn )) {
2124                                 dobind = 0;
2125                                 goto done;
2126                         }
2127                 } else if ( SLAP_IS_AUTHZ_BACKEND( op )) {
2128                         dobind = 0;
2129                         goto done;
2130                 }
2131         }
2132
2133         switch ( li->li_idassert_mode ) {
2134         case LDAP_BACK_IDASSERT_LEGACY:
2135                 if ( !BER_BVISNULL( &ndn ) && !BER_BVISEMPTY( &ndn ) ) {
2136                         if ( !BER_BVISNULL( &li->li_idassert_authcDN ) && !BER_BVISEMPTY( &li->li_idassert_authcDN ) )
2137                         {
2138                                 *binddn = li->li_idassert_authcDN;
2139                                 *bindcred = li->li_idassert_passwd;
2140                                 dobind = 1;
2141                         }
2142                 }
2143                 break;
2144
2145         default:
2146                 /* NOTE: rootdn can always idassert */
2147                 if ( BER_BVISNULL( &ndn )
2148                         && li->li_idassert_authz == NULL
2149                         && !( li->li_idassert_flags & LDAP_BACK_AUTH_AUTHZ_ALL ) )
2150                 {
2151                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
2152                                 rs->sr_err = LDAP_INAPPROPRIATE_AUTH;
2153                                 if ( sendok & LDAP_BACK_SENDERR ) {
2154                                         send_ldap_result( op, rs );
2155                                         dobind = -1;
2156                                 }
2157
2158                         } else {
2159                                 rs->sr_err = LDAP_SUCCESS;
2160                                 *binddn = slap_empty_bv;
2161                                 *bindcred = slap_empty_bv;
2162                                 break;
2163                         }
2164
2165                         goto done;
2166
2167                 } else if ( !be_isroot( op ) ) {
2168                         if ( li->li_idassert_passthru ) {
2169                                 struct berval authcDN;
2170
2171                                 if ( BER_BVISNULL( &ndn ) ) {
2172                                         authcDN = slap_empty_bv;
2173
2174                                 } else {
2175                                         authcDN = ndn;
2176                                 }
2177                                 rs->sr_err = slap_sasl_matches( op, li->li_idassert_passthru,
2178                                                 &authcDN, &authcDN );
2179                                 if ( rs->sr_err == LDAP_SUCCESS ) {
2180                                         dobind = 0;
2181                                         break;
2182                                 }
2183                         }
2184
2185                         if ( li->li_idassert_authz ) {
2186                                 struct berval authcDN;
2187
2188                                 if ( BER_BVISNULL( &ndn ) ) {
2189                                         authcDN = slap_empty_bv;
2190
2191                                 } else {
2192                                         authcDN = ndn;
2193                                 }
2194                                 rs->sr_err = slap_sasl_matches( op, li->li_idassert_authz,
2195                                                 &authcDN, &authcDN );
2196                                 if ( rs->sr_err != LDAP_SUCCESS ) {
2197                                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
2198                                                 if ( sendok & LDAP_BACK_SENDERR ) {
2199                                                         send_ldap_result( op, rs );
2200                                                         dobind = -1;
2201                                                 }
2202
2203                                         } else {
2204                                                 rs->sr_err = LDAP_SUCCESS;
2205                                                 *binddn = slap_empty_bv;
2206                                                 *bindcred = slap_empty_bv;
2207                                                 break;
2208                                         }
2209
2210                                         goto done;
2211                                 }
2212                         }
2213                 }
2214
2215                 *binddn = li->li_idassert_authcDN;
2216                 *bindcred = li->li_idassert_passwd;
2217                 dobind = 1;
2218                 break;
2219         }
2220
2221 done:;
2222         return dobind;
2223 }
2224
2225 static int
2226 ldap_back_proxy_authz_bind(
2227         ldapconn_t              *lc,
2228         Operation               *op,
2229         SlapReply               *rs,
2230         ldap_back_send_t        sendok,
2231         struct berval           *binddn,
2232         struct berval           *bindcred )
2233 {
2234         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
2235         struct berval   ndn;
2236         int             msgid;
2237         int             rc;
2238
2239         if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
2240                 ndn = op->o_conn->c_ndn;
2241
2242         } else {
2243                 ndn = op->o_ndn;
2244         }
2245
2246         if ( li->li_idassert_authmethod == LDAP_AUTH_SASL ) {
2247 #ifdef HAVE_CYRUS_SASL
2248                 void            *defaults = NULL;
2249                 struct berval   authzID = BER_BVNULL;
2250                 int             freeauthz = 0;
2251                 LDAPControl **ctrlsp = NULL;
2252                 LDAPMessage *result = NULL;
2253                 const char *rmech = NULL;
2254                 const char *save_text = rs->sr_text;
2255
2256 #ifdef SLAP_AUTH_DN
2257                 LDAPControl ctrl, *ctrls[2];
2258                 int msgid;
2259 #endif /* SLAP_AUTH_DN */
2260
2261                 /* if SASL supports native authz, prepare for it */
2262                 if ( ( !op->o_do_not_cache || !op->o_is_auth_check ) &&
2263                                 ( li->li_idassert_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
2264                 {
2265                         switch ( li->li_idassert_mode ) {
2266                         case LDAP_BACK_IDASSERT_OTHERID:
2267                         case LDAP_BACK_IDASSERT_OTHERDN:
2268                                 authzID = li->li_idassert_authzID;
2269                                 break;
2270
2271                         case LDAP_BACK_IDASSERT_ANONYMOUS:
2272                                 BER_BVSTR( &authzID, "dn:" );
2273                                 break;
2274
2275                         case LDAP_BACK_IDASSERT_SELF:
2276                                 if ( BER_BVISNULL( &ndn ) ) {
2277                                         /* connection is not authc'd, so don't idassert */
2278                                         BER_BVSTR( &authzID, "dn:" );
2279                                         break;
2280                                 }
2281                                 authzID.bv_len = STRLENOF( "dn:" ) + ndn.bv_len;
2282                                 authzID.bv_val = slap_sl_malloc( authzID.bv_len + 1, op->o_tmpmemctx );
2283                                 AC_MEMCPY( authzID.bv_val, "dn:", STRLENOF( "dn:" ) );
2284                                 AC_MEMCPY( authzID.bv_val + STRLENOF( "dn:" ),
2285                                                 ndn.bv_val, ndn.bv_len + 1 );
2286                                 freeauthz = 1;
2287                                 break;
2288
2289                         default:
2290                                 break;
2291                         }
2292                 }
2293
2294                 if ( li->li_idassert_secprops != NULL ) {
2295                         rs->sr_err = ldap_set_option( lc->lc_ld,
2296                                 LDAP_OPT_X_SASL_SECPROPS,
2297                                 (void *)li->li_idassert_secprops );
2298
2299                         if ( rs->sr_err != LDAP_OPT_SUCCESS ) {
2300                                 rs->sr_err = LDAP_OTHER;
2301                                 if ( sendok & LDAP_BACK_SENDERR ) {
2302                                         send_ldap_result( op, rs );
2303                                 }
2304                                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2305                                 goto done;
2306                         }
2307                 }
2308
2309                 defaults = lutil_sasl_defaults( lc->lc_ld,
2310                                 li->li_idassert_sasl_mech.bv_val,
2311                                 li->li_idassert_sasl_realm.bv_val,
2312                                 li->li_idassert_authcID.bv_val,
2313                                 li->li_idassert_passwd.bv_val,
2314                                 authzID.bv_val );
2315                 if ( defaults == NULL ) {
2316                         rs->sr_err = LDAP_OTHER;
2317                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2318                         if ( sendok & LDAP_BACK_SENDERR ) {
2319                                 send_ldap_result( op, rs );
2320                         }
2321                         goto done;
2322                 }
2323
2324 #ifdef SLAP_AUTH_DN
2325                 if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_AUTHZID ) {
2326                         assert( BER_BVISNULL( binddn ) );
2327
2328                         ctrl.ldctl_oid = LDAP_CONTROL_AUTHZID_REQUEST;
2329                         ctrl.ldctl_iscritical = 0;
2330                         BER_BVZERO( &ctrl.ldctl_value );
2331                         ctrls[0] = &ctrl;
2332                         ctrls[1] = NULL;
2333                         ctrlsp = ctrls;
2334                 }
2335 #endif /* SLAP_AUTH_DN */
2336
2337                 do {
2338                         rs->sr_err = ldap_sasl_interactive_bind( lc->lc_ld, binddn->bv_val,
2339                                 li->li_idassert_sasl_mech.bv_val,
2340                                 ctrlsp, NULL, LDAP_SASL_QUIET, lutil_sasl_interact, defaults,
2341                                 result, &rmech, &msgid );
2342
2343                         if ( rs->sr_err != LDAP_SASL_BIND_IN_PROGRESS )
2344                                 break;
2345
2346                         ldap_msgfree( result );
2347
2348                         if ( ldap_result( lc->lc_ld, msgid, LDAP_MSG_ALL, NULL, &result ) == -1 || !result ) {
2349                                 ldap_get_option( lc->lc_ld, LDAP_OPT_RESULT_CODE, (void*)&rs->sr_err );
2350                                 ldap_get_option( lc->lc_ld, LDAP_OPT_DIAGNOSTIC_MESSAGE, (void*)&rs->sr_text );
2351                                 break;
2352                         }
2353                 } while ( rs->sr_err == LDAP_SASL_BIND_IN_PROGRESS );
2354
2355                 ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
2356                 ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
2357                 ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
2358
2359                 switch ( rs->sr_err ) {
2360                 case LDAP_SUCCESS:
2361 #ifdef SLAP_AUTH_DN
2362                         /* FIXME: right now, the only reason to check
2363                          * response controls is RFC 3829 authzid */
2364                         if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_AUTHZID ) {
2365                                 ctrlsp = NULL;
2366                                 rc = ldap_parse_result( lc->lc_ld, result, NULL, NULL, NULL, NULL,
2367                                         &ctrlsp, 0 );
2368                                 if ( rc == LDAP_SUCCESS && ctrlsp ) {
2369                                         LDAPControl *ctrl;
2370
2371                                         ctrl = ldap_control_find( LDAP_CONTROL_AUTHZID_RESPONSE,
2372                                                 ctrlsp, NULL );
2373                                         if ( ctrl ) {
2374                                                 Debug( LDAP_DEBUG_TRACE, "%s: ldap_back_proxy_authz_bind: authzID=\"%s\" (authzid)\n",
2375                                                         op->o_log_prefix, ctrl->ldctl_value.bv_val, 0 );
2376                                                 if ( ctrl->ldctl_value.bv_len > STRLENOF("dn:") &&
2377                                                         strncasecmp( ctrl->ldctl_value.bv_val, "dn:", STRLENOF("dn:") ) == 0 )
2378                                                 {
2379                                                         struct berval bv;
2380                                                         bv.bv_val = &ctrl->ldctl_value.bv_val[STRLENOF("dn:")];
2381                                                         bv.bv_len = ctrl->ldctl_value.bv_len - STRLENOF("dn:");
2382                                                         ber_bvreplace( &lc->lc_bound_ndn, &bv );
2383                                                 }
2384                                         }
2385                                 }
2386
2387                                 ldap_controls_free( ctrlsp );
2388
2389                         } else if ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_WHOAMI ) {
2390                                 struct berval *val = NULL;
2391                                 rc = ldap_whoami_s( lc->lc_ld, &val, NULL, NULL );
2392                                 if ( rc == LDAP_SUCCESS && val != NULL ) {
2393                                         Debug( LDAP_DEBUG_TRACE, "%s: ldap_back_proxy_authz_bind: authzID=\"%s\" (whoami)\n",
2394                                                 op->o_log_prefix, val->bv_val, 0 );
2395                                         if ( val->bv_len > STRLENOF("dn:") &&
2396                                                 strncasecmp( val->bv_val, "dn:", STRLENOF("dn:") ) == 0 )
2397                                         {
2398                                                 struct berval bv;
2399                                                 bv.bv_val = &val->bv_val[STRLENOF("dn:")];
2400                                                 bv.bv_len = val->bv_len - STRLENOF("dn:");
2401                                                 ber_bvreplace( &lc->lc_bound_ndn, &bv );
2402                                         }
2403                                         ber_bvfree( val );
2404                                 }
2405                         }
2406
2407                         if ( ( li->li_idassert_flags & LDAP_BACK_AUTH_DN_MASK ) &&
2408                                 BER_BVISNULL( &lc->lc_bound_ndn ) )
2409                         {
2410                                 /* all in all, we only need it to be non-null */
2411                                 /* FIXME: should this be configurable? */
2412                                 static struct berval bv = BER_BVC("cn=authzdn");
2413                                 ber_bvreplace( &lc->lc_bound_ndn, &bv );
2414                         }
2415 #endif /* SLAP_AUTH_DN */
2416                         LDAP_BACK_CONN_ISBOUND_SET( lc );
2417                         break;
2418
2419                 case LDAP_LOCAL_ERROR:
2420                         /* list client API error codes that require
2421                          * to taint the connection */
2422                         /* FIXME: should actually retry? */
2423                         LDAP_BACK_CONN_TAINTED_SET( lc );
2424
2425                         /* fallthru */
2426
2427                 default:
2428                         LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2429                         rs->sr_err = slap_map_api2result( rs );
2430                         if ( sendok & LDAP_BACK_SENDERR ) {
2431                                 send_ldap_result( op, rs );
2432                         }
2433                         break;
2434                 }
2435
2436                 if ( save_text != rs->sr_text ) {
2437                         ldap_memfree( (char *)rs->sr_text );
2438                         rs->sr_text = save_text;
2439                 }
2440
2441                 ldap_msgfree( result );
2442
2443                 lutil_sasl_freedefs( defaults );
2444                 if ( freeauthz ) {
2445                         slap_sl_free( authzID.bv_val, op->o_tmpmemctx );
2446                 }
2447
2448                 goto done;
2449 #endif /* HAVE_CYRUS_SASL */
2450         }
2451
2452         switch ( li->li_idassert_authmethod ) {
2453         case LDAP_AUTH_NONE:
2454                 /* FIXME: do we really need this? */
2455                 BER_BVSTR( binddn, "" );
2456                 BER_BVSTR( bindcred, "" );
2457                 /* fallthru */
2458
2459         case LDAP_AUTH_SIMPLE:
2460                 rs->sr_err = ldap_sasl_bind( lc->lc_ld,
2461                                 binddn->bv_val, LDAP_SASL_SIMPLE,
2462                                 bindcred, NULL, NULL, &msgid );
2463                 rc = ldap_back_op_result( lc, op, rs, msgid,
2464                         -1, ( sendok | LDAP_BACK_BINDING ) );
2465
2466                 ldap_pvt_thread_mutex_lock( &li->li_counter_mutex );
2467                 ldap_pvt_mp_add( li->li_ops_completed[ SLAP_OP_BIND ], 1 );
2468                 ldap_pvt_thread_mutex_unlock( &li->li_counter_mutex );
2469                 break;
2470
2471         default:
2472                 /* unsupported! */
2473                 LDAP_BACK_CONN_ISBOUND_CLEAR( lc );
2474                 rs->sr_err = LDAP_AUTH_METHOD_NOT_SUPPORTED;
2475                 if ( sendok & LDAP_BACK_SENDERR ) {
2476                         send_ldap_result( op, rs );
2477                 }
2478                 goto done;
2479         }
2480
2481         if ( rc == LDAP_SUCCESS ) {
2482                 /* set rebind stuff in case of successful proxyAuthz bind,
2483                  * so that referral chasing is attempted using the right
2484                  * identity */
2485                 LDAP_BACK_CONN_ISBOUND_SET( lc );
2486                 if ( !BER_BVISNULL( binddn ) ) {
2487                         ber_bvreplace( &lc->lc_bound_ndn, binddn );
2488                 }
2489
2490                 if ( !BER_BVISNULL( &lc->lc_cred ) ) {
2491                         memset( lc->lc_cred.bv_val, 0,
2492                                         lc->lc_cred.bv_len );
2493                 }
2494
2495                 if ( LDAP_BACK_SAVECRED( li ) ) {
2496                         if ( !BER_BVISNULL( bindcred ) ) {
2497                                 ber_bvreplace( &lc->lc_cred, bindcred );
2498                                 ldap_set_rebind_proc( lc->lc_ld, li->li_rebind_f, lc );
2499                         }
2500
2501                 } else {
2502                         lc->lc_cred.bv_len = 0;
2503                 }
2504         }
2505
2506 done:;
2507         return LDAP_BACK_CONN_ISBOUND( lc );
2508 }
2509
2510 /*
2511  * ldap_back_proxy_authz_ctrl() prepends a proxyAuthz control
2512  * to existing server-side controls if required; if not,
2513  * the existing server-side controls are placed in *pctrls.
2514  * The caller, after using the controls in client API
2515  * operations, if ( *pctrls != op->o_ctrls ), should
2516  * free( (*pctrls)[ 0 ] ) and free( *pctrls ).
2517  * The function returns success if the control could
2518  * be added if required, or if it did nothing; in the future,
2519  * it might return some error if it failed.
2520  *
2521  * if no bind took place yet, but the connection is bound
2522  * and the "proxyauthzdn" is set, then bind as "proxyauthzdn"
2523  * and explicitly add proxyAuthz the control to every operation
2524  * with the dn bound to the connection as control value.
2525  *
2526  * If no server-side controls are defined for the operation,
2527  * simply add the proxyAuthz control; otherwise, if the
2528  * proxyAuthz control is not already set, add it as
2529  * the first one
2530  *
2531  * FIXME: is controls order significant for security?
2532  * ANSWER: controls ordering and interoperability
2533  * must be indicated by the specs of each control; if none
2534  * is specified, the order is irrelevant.
2535  */
2536 int
2537 ldap_back_proxy_authz_ctrl(
2538                 Operation       *op,
2539                 SlapReply       *rs,
2540                 struct berval   *bound_ndn,
2541                 int             version,
2542                 slap_idassert_t *si,
2543                 LDAPControl     *ctrl )
2544 {
2545         slap_idassert_mode_t    mode;
2546         struct berval           assertedID,
2547                                 ndn;
2548         int                     isroot = 0;
2549
2550         rs->sr_err = SLAP_CB_CONTINUE;
2551
2552         /* FIXME: SASL/EXTERNAL over ldapi:// doesn't honor the authcID,
2553          * but if it is not set this test fails.  We need a different
2554          * means to detect if idassert is enabled */
2555         if ( ( BER_BVISNULL( &si->si_bc.sb_authcId ) || BER_BVISEMPTY( &si->si_bc.sb_authcId ) )
2556                 && ( BER_BVISNULL( &si->si_bc.sb_binddn ) || BER_BVISEMPTY( &si->si_bc.sb_binddn ) )
2557                 && BER_BVISNULL( &si->si_bc.sb_saslmech ) )
2558         {
2559                 goto done;
2560         }
2561
2562         if ( !op->o_conn || op->o_do_not_cache || ( isroot = be_isroot( op ) ) ) {
2563                 goto done;
2564         }
2565
2566         if ( op->o_tag == LDAP_REQ_BIND ) {
2567                 ndn = op->o_req_ndn;
2568
2569         } else if ( !BER_BVISNULL( &op->o_conn->c_ndn ) ) {
2570                 ndn = op->o_conn->c_ndn;
2571
2572         } else {
2573                 ndn = op->o_ndn;
2574         }
2575
2576         if ( si->si_mode == LDAP_BACK_IDASSERT_LEGACY ) {
2577                 if ( op->o_proxy_authz ) {
2578                         /*
2579                          * FIXME: we do not want to perform proxyAuthz
2580                          * on behalf of the client, because this would
2581                          * be performed with "proxyauthzdn" privileges.
2582                          *
2583                          * This might actually be too strict, since
2584                          * the "proxyauthzdn" authzTo, and each entry's
2585                          * authzFrom attributes may be crafted
2586                          * to avoid unwanted proxyAuthz to take place.
2587                          */
2588 #if 0
2589                         rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2590                         rs->sr_text = "proxyAuthz not allowed within namingContext";
2591 #endif
2592                         goto done;
2593                 }
2594
2595                 if ( !BER_BVISNULL( bound_ndn ) ) {
2596                         goto done;
2597                 }
2598
2599                 if ( BER_BVISNULL( &ndn ) ) {
2600                         goto done;
2601                 }
2602
2603                 if ( BER_BVISNULL( &si->si_bc.sb_binddn ) ) {
2604                         goto done;
2605                 }
2606
2607         } else if ( si->si_bc.sb_method == LDAP_AUTH_SASL ) {
2608                 if ( ( si->si_flags & LDAP_BACK_AUTH_NATIVE_AUTHZ ) )
2609                 {
2610                         /* already asserted in SASL via native authz */
2611                         goto done;
2612                 }
2613
2614         } else if ( si->si_authz && !isroot ) {
2615                 int             rc;
2616                 struct berval authcDN;
2617
2618                 if ( BER_BVISNULL( &ndn ) ) {
2619                         authcDN = slap_empty_bv;
2620                 } else {
2621                         authcDN = ndn;
2622                 }
2623                 rc = slap_sasl_matches( op, si->si_authz,
2624                                 &authcDN, &authcDN );
2625                 if ( rc != LDAP_SUCCESS ) {
2626                         if ( si->si_flags & LDAP_BACK_AUTH_PRESCRIPTIVE ) {
2627                                 /* ndn is not authorized
2628                                  * to use idassert */
2629                                 rs->sr_err = rc;
2630                         }
2631                         goto done;
2632                 }
2633         }
2634
2635         if ( op->o_proxy_authz ) {
2636                 /*
2637                  * FIXME: we can:
2638                  * 1) ignore the already set proxyAuthz control
2639                  * 2) leave it in place, and don't set ours
2640                  * 3) add both
2641                  * 4) reject the operation
2642                  *
2643                  * option (4) is very drastic
2644                  * option (3) will make the remote server reject
2645                  * the operation, thus being equivalent to (4)
2646                  * option (2) will likely break the idassert
2647                  * assumptions, so we cannot accept it;
2648                  * option (1) means that we are contradicting
2649                  * the client's reques.
2650                  *
2651                  * I think (4) is the only correct choice.
2652                  */
2653                 rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
2654                 rs->sr_text = "proxyAuthz not allowed within namingContext";
2655         }
2656
2657         if ( op->o_is_auth_check ) {
2658                 mode = LDAP_BACK_IDASSERT_NOASSERT;
2659
2660         } else {
2661                 mode = si->si_mode;
2662         }
2663
2664         switch ( mode ) {
2665         case LDAP_BACK_IDASSERT_LEGACY:
2666                 /* original behavior:
2667                  * assert the client's identity */
2668         case LDAP_BACK_IDASSERT_SELF:
2669                 assertedID = ndn;
2670                 break;
2671
2672         case LDAP_BACK_IDASSERT_ANONYMOUS:
2673                 /* assert "anonymous" */
2674                 assertedID = slap_empty_bv;
2675                 break;
2676
2677         case LDAP_BACK_IDASSERT_NOASSERT:
2678                 /* don't assert; bind as proxyauthzdn */
2679                 goto done;
2680
2681         case LDAP_BACK_IDASSERT_OTHERID:
2682         case LDAP_BACK_IDASSERT_OTHERDN:
2683                 /* assert idassert DN */
2684                 assertedID = si->si_bc.sb_authzId;
2685                 break;
2686
2687         default:
2688                 assert( 0 );
2689         }
2690
2691         /* if we got here, "" is allowed to proxyAuthz */
2692         if ( BER_BVISNULL( &assertedID ) ) {
2693                 assertedID = slap_empty_bv;
2694         }
2695
2696         /* don't idassert the bound DN (ITS#4497) */
2697         if ( dn_match( &assertedID, bound_ndn ) ) {
2698                 goto done;
2699         }
2700
2701         ctrl->ldctl_oid = LDAP_CONTROL_PROXY_AUTHZ;
2702         ctrl->ldctl_iscritical = ( ( si->si_flags & LDAP_BACK_AUTH_PROXYAUTHZ_CRITICAL ) == LDAP_BACK_AUTH_PROXYAUTHZ_CRITICAL );
2703
2704         switch ( si->si_mode ) {
2705         /* already in u:ID or dn:DN form */
2706         case LDAP_BACK_IDASSERT_OTHERID:
2707         case LDAP_BACK_IDASSERT_OTHERDN:
2708                 ber_dupbv_x( &ctrl->ldctl_value, &assertedID, op->o_tmpmemctx );
2709                 rs->sr_err = LDAP_SUCCESS;
2710                 break;
2711
2712         /* needs the dn: prefix */
2713         default:
2714                 ctrl->ldctl_value.bv_len = assertedID.bv_len + STRLENOF( "dn:" );
2715                 ctrl->ldctl_value.bv_val = op->o_tmpalloc( ctrl->ldctl_value.bv_len + 1,
2716                                 op->o_tmpmemctx );
2717                 AC_MEMCPY( ctrl->ldctl_value.bv_val, "dn:", STRLENOF( "dn:" ) );
2718                 AC_MEMCPY( &ctrl->ldctl_value.bv_val[ STRLENOF( "dn:" ) ],
2719                                 assertedID.bv_val, assertedID.bv_len + 1 );
2720                 rs->sr_err = LDAP_SUCCESS;
2721                 break;
2722         }
2723
2724         /* Older versions of <draft-weltman-ldapv3-proxy> required
2725          * to encode the value of the authzID (and called it proxyDN);
2726          * this hack provides compatibility with those DSAs that
2727          * implement it this way */
2728         if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_ENCODING_WORKAROUND ) {
2729                 struct berval           authzID = ctrl->ldctl_value;
2730                 BerElementBuffer        berbuf;
2731                 BerElement              *ber = (BerElement *)&berbuf;
2732                 ber_tag_t               tag;
2733
2734                 ber_init2( ber, 0, LBER_USE_DER );
2735                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
2736
2737                 tag = ber_printf( ber, "O", &authzID );
2738                 if ( tag == LBER_ERROR ) {
2739                         rs->sr_err = LDAP_OTHER;
2740                         goto free_ber;
2741                 }
2742
2743                 if ( ber_flatten2( ber, &ctrl->ldctl_value, 1 ) == -1 ) {
2744                         rs->sr_err = LDAP_OTHER;
2745                         goto free_ber;
2746                 }
2747
2748                 rs->sr_err = LDAP_SUCCESS;
2749
2750 free_ber:;
2751                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
2752                 ber_free_buf( ber );
2753
2754                 if ( rs->sr_err != LDAP_SUCCESS ) {
2755                         goto done;
2756                 }
2757
2758         } else if ( si->si_flags & LDAP_BACK_AUTH_OBSOLETE_PROXY_AUTHZ ) {
2759                 struct berval           authzID = ctrl->ldctl_value,
2760                                         tmp;
2761                 BerElementBuffer        berbuf;
2762                 BerElement              *ber = (BerElement *)&berbuf;
2763                 ber_tag_t               tag;
2764
2765                 if ( strncasecmp( authzID.bv_val, "dn:", STRLENOF( "dn:" ) ) != 0 ) {
2766                         rs->sr_err = LDAP_PROTOCOL_ERROR;
2767                         goto done;
2768                 }
2769
2770                 tmp = authzID;
2771                 tmp.bv_val += STRLENOF( "dn:" );
2772                 tmp.bv_len -= STRLENOF( "dn:" );
2773
2774                 ber_init2( ber, 0, LBER_USE_DER );
2775                 ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
2776
2777                 /* apparently, Mozilla API encodes this
2778                  * as "SEQUENCE { LDAPDN }" */
2779                 tag = ber_printf( ber, "{O}", &tmp );
2780                 if ( tag == LBER_ERROR ) {
2781                         rs->sr_err = LDAP_OTHER;
2782                         goto free_ber2;
2783                 }
2784
2785                 if ( ber_flatten2( ber, &ctrl->ldctl_value, 1 ) == -1 ) {
2786                         rs->sr_err = LDAP_OTHER;
2787                         goto free_ber2;
2788                 }
2789
2790                 ctrl->ldctl_oid = LDAP_CONTROL_OBSOLETE_PROXY_AUTHZ;
2791                 rs->sr_err = LDAP_SUCCESS;
2792
2793 free_ber2:;
2794                 op->o_tmpfree( authzID.bv_val, op->o_tmpmemctx );
2795                 ber_free_buf( ber );
2796
2797                 if ( rs->sr_err != LDAP_SUCCESS ) {
2798                         goto done;
2799                 }
2800         }
2801
2802 done:;
2803
2804         return rs->sr_err;
2805 }
2806
2807 /*
2808  * Add controls;
2809  *
2810  * if any needs to be added, it is prepended to existing ones,
2811  * in a newly allocated array.  The companion function
2812  * ldap_back_controls_free() must be used to restore the original
2813  * status of op->o_ctrls.
2814  */
2815 int
2816 ldap_back_controls_add(
2817                 Operation       *op,
2818                 SlapReply       *rs,
2819                 ldapconn_t      *lc,
2820                 LDAPControl     ***pctrls )
2821 {
2822         ldapinfo_t      *li = (ldapinfo_t *)op->o_bd->be_private;
2823
2824         LDAPControl     **ctrls = NULL;
2825         /* set to the maximum number of controls this backend can add */
2826         LDAPControl     c[ 2 ] = { { 0 } };
2827         int             n = 0, i, j1 = 0, j2 = 0;
2828
2829         *pctrls = NULL;
2830
2831         rs->sr_err = LDAP_SUCCESS;
2832
2833         /* don't add controls if protocol is not LDAPv3 */
2834         switch ( li->li_version ) {
2835         case LDAP_VERSION3:
2836                 break;
2837
2838         case 0:
2839                 if ( op->o_protocol == 0 || op->o_protocol == LDAP_VERSION3 ) {
2840                         break;
2841                 }
2842                 /* fall thru */
2843
2844         default:
2845                 goto done;
2846         }
2847
2848         /* put controls that go __before__ existing ones here */
2849
2850         /* proxyAuthz for identity assertion */
2851         switch ( ldap_back_proxy_authz_ctrl( op, rs, &lc->lc_bound_ndn,
2852                 li->li_version, &li->li_idassert, &c[ j1 ] ) )
2853         {
2854         case SLAP_CB_CONTINUE:
2855                 break;
2856
2857         case LDAP_SUCCESS:
2858                 j1++;
2859                 break;
2860
2861         default:
2862                 goto done;
2863         }
2864
2865         /* put controls that go __after__ existing ones here */
2866
2867 #ifdef SLAP_CONTROL_X_SESSION_TRACKING
2868         /* FIXME: according to <draft-wahl-ldap-session>,
2869          * the server should check if the control can be added
2870          * based on the identity of the client and so */
2871
2872         /* session tracking */
2873         if ( LDAP_BACK_ST_REQUEST( li ) ) {
2874                 switch ( slap_ctrl_session_tracking_request_add( op, rs, &c[ j1 + j2 ] ) ) {
2875                 case SLAP_CB_CONTINUE:
2876                         break;
2877
2878                 case LDAP_SUCCESS:
2879                         j2++;
2880                         break;
2881
2882                 default:
2883                         goto done;
2884                 }
2885         }
2886 #endif /* SLAP_CONTROL_X_SESSION_TRACKING */
2887
2888         if ( rs->sr_err == SLAP_CB_CONTINUE ) {
2889                 rs->sr_err = LDAP_SUCCESS;
2890         }
2891
2892         /* if nothing to do, just bail out */
2893         if ( j1 == 0 && j2 == 0 ) {
2894                 goto done;
2895         }
2896
2897         assert( j1 + j2 <= (int) (sizeof( c )/sizeof( c[0] )) );
2898
2899         if ( op->o_ctrls ) {
2900                 for ( n = 0; op->o_ctrls[ n ]; n++ )
2901                         /* just count ctrls */ ;
2902         }
2903
2904         ctrls = op->o_tmpalloc( (n + j1 + j2 + 1) * sizeof( LDAPControl * ) + ( j1 + j2 ) * sizeof( LDAPControl ),
2905                         op->o_tmpmemctx );
2906         if ( j1 ) {
2907                 ctrls[ 0 ] = (LDAPControl *)&ctrls[ n + j1 + j2 + 1 ];
2908                 *ctrls[ 0 ] = c[ 0 ];
2909                 for ( i = 1; i < j1; i++ ) {
2910                         ctrls[ i ] = &ctrls[ 0 ][ i ];
2911                         *ctrls[ i ] = c[ i ];
2912                 }
2913         }
2914
2915         i = 0;
2916         if ( op->o_ctrls ) {
2917                 for ( i = 0; op->o_ctrls[ i ]; i++ ) {
2918                         ctrls[ i + j1 ] = op->o_ctrls[ i ];
2919                 }
2920         }
2921
2922         n += j1;
2923         if ( j2 ) {
2924                 ctrls[ n ] = (LDAPControl *)&ctrls[ n + j2 + 1 ] + j1;
2925                 *ctrls[ n ] = c[ j1 ];
2926                 for ( i = 1; i < j2; i++ ) {
2927                         ctrls[ n + i ] = &ctrls[ n ][ i ];
2928                         *ctrls[ n + i ] = c[ i ];
2929                 }
2930         }
2931
2932         ctrls[ n + j2 ] = NULL;
2933
2934 done:;
2935         if ( ctrls == NULL ) {
2936                 ctrls = op->o_ctrls;
2937         }
2938
2939         *pctrls = ctrls;
2940
2941         return rs->sr_err;
2942 }
2943
2944 int
2945 ldap_back_controls_free( Operation *op, SlapReply *rs, LDAPControl ***pctrls )
2946 {
2947         LDAPControl     **ctrls = *pctrls;
2948
2949         /* we assume that the controls added by the proxy come first,
2950          * so as soon as we find op->o_ctrls[ 0 ] we can stop */
2951         if ( ctrls && ctrls != op->o_ctrls ) {
2952                 int             i = 0, n = 0, n_added;
2953                 LDAPControl     *lower, *upper;
2954
2955                 assert( ctrls[ 0 ] != NULL );
2956
2957                 for ( n = 0; ctrls[ n ] != NULL; n++ )
2958                         /* count 'em */ ;
2959
2960                 if ( op->o_ctrls ) {
2961                         for ( i = 0; op->o_ctrls[ i ] != NULL; i++ )
2962                                 /* count 'em */ ;
2963                 }
2964
2965                 n_added = n - i;
2966                 lower = (LDAPControl *)&ctrls[ n ];
2967                 upper = &lower[ n_added ];
2968
2969                 for ( i = 0; ctrls[ i ] != NULL; i++ ) {
2970                         if ( ctrls[ i ] < lower || ctrls[ i ] >= upper ) {
2971                                 /* original; don't touch */
2972                                 continue;
2973                         }
2974
2975                         if ( !BER_BVISNULL( &ctrls[ i ]->ldctl_value ) ) {
2976                                 op->o_tmpfree( ctrls[ i ]->ldctl_value.bv_val, op->o_tmpmemctx );
2977                         }
2978                 }
2979
2980                 op->o_tmpfree( ctrls, op->o_tmpmemctx );
2981         }
2982
2983         *pctrls = NULL;
2984
2985         return 0;
2986 }
2987
2988 int
2989 ldap_back_conn2str( const ldapconn_base_t *lc, char *buf, ber_len_t buflen )
2990 {
2991         char tbuf[ SLAP_TEXT_BUFLEN ];
2992         char *ptr = buf, *end = buf + buflen;
2993         int len;
2994
2995         if ( ptr + sizeof("conn=") > end ) return -1;
2996         ptr = lutil_strcopy( ptr, "conn=" );
2997
2998         len = ldap_back_connid2str( lc, ptr, (ber_len_t)(end - ptr) );
2999         ptr += len;
3000         if ( ptr >= end ) return -1;
3001
3002         if ( !BER_BVISNULL( &lc->lcb_local_ndn ) ) {
3003                 if ( ptr + sizeof(" DN=\"\"") + lc->lcb_local_ndn.bv_len > end ) return -1;
3004                 ptr = lutil_strcopy( ptr, " DN=\"" );
3005                 ptr = lutil_strncopy( ptr, lc->lcb_local_ndn.bv_val, lc->lcb_local_ndn.bv_len );
3006                 *ptr++ = '"';
3007         }
3008
3009         if ( lc->lcb_create_time != 0 ) {
3010                 len = snprintf( tbuf, sizeof(tbuf), "%ld", lc->lcb_create_time );
3011                 if ( ptr + sizeof(" created=") + len >= end ) return -1;
3012                 ptr = lutil_strcopy( ptr, " created=" );
3013                 ptr = lutil_strcopy( ptr, tbuf );
3014         }
3015
3016         if ( lc->lcb_time != 0 ) {
3017                 len = snprintf( tbuf, sizeof(tbuf), "%ld", lc->lcb_time );
3018                 if ( ptr + sizeof(" modified=") + len >= end ) return -1;
3019                 ptr = lutil_strcopy( ptr, " modified=" );
3020                 ptr = lutil_strcopy( ptr, tbuf );
3021         }
3022
3023         len = snprintf( tbuf, sizeof(tbuf), "%u", lc->lcb_refcnt );
3024         if ( ptr + sizeof(" refcnt=") + len >= end ) return -1;
3025         ptr = lutil_strcopy( ptr, " refcnt=" );
3026         ptr = lutil_strcopy( ptr, tbuf );
3027
3028         return ptr - buf;
3029 }
3030
3031 int
3032 ldap_back_connid2str( const ldapconn_base_t *lc, char *buf, ber_len_t buflen )
3033 {
3034         static struct berval conns[] = {
3035                 BER_BVC("ROOTDN"),
3036                 BER_BVC("ROOTDN-TLS"),
3037                 BER_BVC("ANON"),
3038                 BER_BVC("ANON-TLS"),
3039                 BER_BVC("BIND"),
3040                 BER_BVC("BIND-TLS"),
3041                 BER_BVNULL
3042         };
3043
3044         int len = 0;
3045
3046         if ( LDAP_BACK_PCONN_ISPRIV( (const ldapconn_t *)lc ) ) {
3047                 long cid;
3048                 struct berval *bv;
3049
3050                 cid = (long)lc->lcb_conn;
3051                 assert( cid >= LDAP_BACK_PCONN_FIRST && cid < LDAP_BACK_PCONN_LAST );
3052
3053                 bv = &conns[ cid ];
3054
3055                 if ( bv->bv_len >= buflen ) {
3056                         return bv->bv_len + 1;
3057                 }
3058
3059                 len = bv->bv_len;
3060                 lutil_strncopy( buf, bv->bv_val, bv->bv_len + 1 );
3061
3062         } else {
3063                 len = snprintf( buf, buflen, "%lu", lc->lcb_conn->c_connid );
3064         }
3065
3066         return len;
3067 }