/* backend.c - routines for dealing with back-end databases */ /* $OpenLDAP$ */ /* This work is part of OpenLDAP Software . * * Copyright 1998-2008 The OpenLDAP Foundation. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted only as authorized by the OpenLDAP * Public License. * * A copy of this license is available in the file LICENSE in the * top-level directory of the distribution or, alternatively, at * . */ /* Portions Copyright (c) 1995 Regents of the University of Michigan. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that this notice is preserved and that due credit is given * to the University of Michigan at Ann Arbor. The name of the University * may not be used to endorse or promote products derived from this * software without specific prior written permission. This software * is provided ``as is'' without express or implied warranty. */ #include "portable.h" #include #include #include #include #include "slap.h" #include "config.h" #include "lutil.h" #include "lber_pvt.h" /* * If a module is configured as dynamic, its header should not * get included into slapd. While this is a general rule and does * not have much of an effect in UNIX, this rule should be adhered * to for Windows, where dynamic object code should not be implicitly * imported into slapd without appropriate __declspec(dllimport) directives. */ int nBackendInfo = 0; slap_bi_head backendInfo = LDAP_STAILQ_HEAD_INITIALIZER(backendInfo); int nBackendDB = 0; slap_be_head backendDB = LDAP_STAILQ_HEAD_INITIALIZER(backendDB); static int backend_init_controls( BackendInfo *bi ) { if ( bi->bi_controls ) { int i; for ( i = 0; bi->bi_controls[ i ]; i++ ) { int cid; if ( slap_find_control_id( bi->bi_controls[ i ], &cid ) == LDAP_CONTROL_NOT_FOUND ) { if ( !( slapMode & SLAP_TOOL_MODE ) ) { assert( 0 ); } return -1; } bi->bi_ctrls[ cid ] = 1; } } return 0; } int backend_init(void) { int rc = -1; BackendInfo *bi; if((nBackendInfo != 0) || !LDAP_STAILQ_EMPTY(&backendInfo)) { /* already initialized */ Debug( LDAP_DEBUG_ANY, "backend_init: already initialized\n", 0, 0, 0 ); return -1; } for( bi=slap_binfo; bi->bi_type != NULL; bi++,nBackendInfo++ ) { assert( bi->bi_init != 0 ); rc = bi->bi_init( bi ); if(rc != 0) { Debug( LDAP_DEBUG_ANY, "backend_init: initialized for type \"%s\"\n", bi->bi_type, 0, 0 ); /* destroy those we've already inited */ for( nBackendInfo--; nBackendInfo >= 0 ; nBackendInfo-- ) { if ( slap_binfo[nBackendInfo].bi_destroy ) { slap_binfo[nBackendInfo].bi_destroy( &slap_binfo[nBackendInfo] ); } } return rc; } LDAP_STAILQ_INSERT_TAIL(&backendInfo, bi, bi_next); } if ( nBackendInfo > 0) { return 0; } #ifdef SLAPD_MODULES return 0; #else Debug( LDAP_DEBUG_ANY, "backend_init: failed\n", 0, 0, 0 ); return rc; #endif /* SLAPD_MODULES */ } int backend_add(BackendInfo *aBackendInfo) { int rc = 0; if ( aBackendInfo->bi_init == NULL ) { Debug( LDAP_DEBUG_ANY, "backend_add: " "backend type \"%s\" does not have the (mandatory)init function\n", aBackendInfo->bi_type, 0, 0 ); return -1; } rc = aBackendInfo->bi_init(aBackendInfo); if ( rc != 0) { Debug( LDAP_DEBUG_ANY, "backend_add: initialization for type \"%s\" failed\n", aBackendInfo->bi_type, 0, 0 ); return rc; } (void)backend_init_controls( aBackendInfo ); /* now add the backend type to the Backend Info List */ LDAP_STAILQ_INSERT_TAIL( &backendInfo, aBackendInfo, bi_next ); nBackendInfo++; return 0; } static int backend_set_controls( BackendDB *be ) { BackendInfo *bi = be->bd_info; /* back-relay takes care of itself; so may do other */ if ( overlay_is_over( be ) ) { bi = ((slap_overinfo *)be->bd_info->bi_private)->oi_orig; } if ( bi->bi_controls ) { if ( be->be_ctrls[ SLAP_MAX_CIDS ] == 0 ) { AC_MEMCPY( be->be_ctrls, bi->bi_ctrls, sizeof( be->be_ctrls ) ); be->be_ctrls[ SLAP_MAX_CIDS ] = 1; } else { int i; for ( i = 0; i < SLAP_MAX_CIDS; i++ ) { if ( bi->bi_ctrls[ i ] ) { be->be_ctrls[ i ] = bi->bi_ctrls[ i ]; } } } } return 0; } /* startup a specific backend database */ int backend_startup_one(Backend *be, ConfigReply *cr) { int rc = 0; assert( be != NULL ); be->be_pending_csn_list = (struct be_pcl *) ch_calloc( 1, sizeof( struct be_pcl ) ); LDAP_TAILQ_INIT( be->be_pending_csn_list ); Debug( LDAP_DEBUG_TRACE, "backend_startup_one: starting \"%s\"\n", be->be_suffix ? be->be_suffix[0].bv_val : "(unknown)", 0, 0 ); /* set database controls */ (void)backend_set_controls( be ); #if 0 if ( !BER_BVISEMPTY( &be->be_rootndn ) && select_backend( &be->be_rootndn, 0 ) == be && BER_BVISNULL( &be->be_rootpw ) ) { /* warning: if rootdn entry is created, * it can take rootdn privileges; * set empty rootpw to prevent */ } #endif if ( be->bd_info->bi_db_open ) { rc = be->bd_info->bi_db_open( be, cr ); if ( rc == 0 ) { (void)backend_set_controls( be ); } else { Debug( LDAP_DEBUG_ANY, "backend_startup_one: bi_db_open failed! (%d)\n", rc, 0, 0 ); } } return rc; } int backend_startup(Backend *be) { int i; int rc = 0; BackendInfo *bi; ConfigReply cr={0, ""}; if( ! ( nBackendDB > 0 ) ) { /* no databases */ Debug( LDAP_DEBUG_ANY, "backend_startup: %d databases to startup.\n", nBackendDB, 0, 0 ); return 1; } if(be != NULL) { if ( be->bd_info->bi_open ) { rc = be->bd_info->bi_open( be->bd_info ); if ( rc != 0 ) { Debug( LDAP_DEBUG_ANY, "backend_startup: bi_open failed!\n", 0, 0, 0 ); return rc; } } /* append global access controls */ acl_append( &be->be_acl, frontendDB->be_acl, -1 ); return backend_startup_one( be, &cr ); } /* open frontend, if required */ if ( frontendDB->bd_info->bi_db_open ) { rc = frontendDB->bd_info->bi_db_open( frontendDB, NULL ); if ( rc != 0 ) { Debug( LDAP_DEBUG_ANY, "backend_startup: bi_db_open(frontend) failed! (%d)\n", rc, 0, 0 ); return rc; } } /* open each backend type */ i = -1; LDAP_STAILQ_FOREACH(bi, &backendInfo, bi_next) { i++; if( bi->bi_nDB == 0) { /* no database of this type, don't open */ continue; } if( bi->bi_open ) { rc = bi->bi_open( bi ); if ( rc != 0 ) { Debug( LDAP_DEBUG_ANY, "backend_startup: bi_open %d (%s) failed!\n", i, bi->bi_type, 0 ); return rc; } } (void)backend_init_controls( bi ); } /* open each backend database */ i = -1; LDAP_STAILQ_FOREACH(be, &backendDB, be_next) { i++; if ( be->be_suffix == NULL ) { Debug( LDAP_DEBUG_ANY, "backend_startup: warning, database %d (%s) " "has no suffix\n", i, be->bd_info->bi_type, 0 ); } /* append global access controls */ acl_append( &be->be_acl, frontendDB->be_acl, -1 ); rc = backend_startup_one( be, &cr ); if ( rc ) return rc; } return rc; } int backend_num( Backend *be ) { int i = 0; BackendDB *b2; if( be == NULL ) return -1; LDAP_STAILQ_FOREACH( b2, &backendDB, be_next ) { if( be == b2 ) return i; i++; } return -1; } int backend_shutdown( Backend *be ) { int rc = 0; BackendInfo *bi; if( be != NULL ) { /* shutdown a specific backend database */ if ( be->bd_info->bi_nDB == 0 ) { /* no database of this type, we never opened it */ return 0; } if ( be->bd_info->bi_db_close ) { be->bd_info->bi_db_close( be, NULL ); } if( be->bd_info->bi_close ) { be->bd_info->bi_close( be->bd_info ); } return 0; } /* close each backend database */ LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) { if ( be->bd_info->bi_db_close ) { be->bd_info->bi_db_close( be, NULL ); } if(rc != 0) { Debug( LDAP_DEBUG_ANY, "backend_close: bi_db_close %s failed!\n", be->be_type, 0, 0 ); } } /* close each backend type */ LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) { if( bi->bi_nDB == 0 ) { /* no database of this type */ continue; } if( bi->bi_close ) { bi->bi_close( bi ); } } /* close frontend, if required */ if ( frontendDB->bd_info->bi_db_close ) { rc = frontendDB->bd_info->bi_db_close ( frontendDB, NULL ); if ( rc != 0 ) { Debug( LDAP_DEBUG_ANY, "backend_startup: bi_db_close(frontend) failed! (%d)\n", rc, 0, 0 ); } } return 0; } /* * This function is supposed to be the exact counterpart * of backend_startup_one(), although this one calls bi_db_destroy() * while backend_startup_one() calls bi_db_open(). * * Make sure backend_stopdown_one() destroys resources allocated * by backend_startup_one(); only call backend_destroy_one() when * all stuff in a BackendDB needs to be destroyed */ void backend_stopdown_one( BackendDB *bd ) { if ( bd->be_pending_csn_list ) { struct slap_csn_entry *csne; csne = LDAP_TAILQ_FIRST( bd->be_pending_csn_list ); while ( csne ) { struct slap_csn_entry *tmp_csne = csne; LDAP_TAILQ_REMOVE( bd->be_pending_csn_list, csne, ce_csn_link ); ch_free( csne->ce_csn.bv_val ); csne = LDAP_TAILQ_NEXT( csne, ce_csn_link ); ch_free( tmp_csne ); } ch_free( bd->be_pending_csn_list ); } if ( bd->bd_info->bi_db_destroy ) { bd->bd_info->bi_db_destroy( bd, NULL ); } } void backend_destroy_one( BackendDB *bd, int dynamic ) { if ( dynamic ) { LDAP_STAILQ_REMOVE(&backendDB, bd, BackendDB, be_next ); } if ( bd->be_syncinfo ) { syncinfo_free( bd->be_syncinfo, 1 ); } backend_stopdown_one( bd ); ber_bvarray_free( bd->be_suffix ); ber_bvarray_free( bd->be_nsuffix ); if ( !BER_BVISNULL( &bd->be_rootdn ) ) { free( bd->be_rootdn.bv_val ); } if ( !BER_BVISNULL( &bd->be_rootndn ) ) { free( bd->be_rootndn.bv_val ); } if ( !BER_BVISNULL( &bd->be_rootpw ) ) { free( bd->be_rootpw.bv_val ); } acl_destroy( bd->be_acl, frontendDB->be_acl ); limits_destroy( bd->be_limits ); if ( !BER_BVISNULL( &bd->be_update_ndn ) ) { ch_free( bd->be_update_ndn.bv_val ); } if ( bd->be_update_refs ) { ber_bvarray_free( bd->be_update_refs ); } if ( dynamic ) { free( bd ); } } int backend_destroy(void) { BackendDB *bd; BackendInfo *bi; /* destroy each backend database */ while (( bd = LDAP_STAILQ_FIRST(&backendDB))) { backend_destroy_one( bd, 1 ); } /* destroy each backend type */ LDAP_STAILQ_FOREACH( bi, &backendInfo, bi_next ) { if( bi->bi_destroy ) { bi->bi_destroy( bi ); } } nBackendInfo = 0; LDAP_STAILQ_INIT(&backendInfo); /* destroy frontend database */ bd = frontendDB; if ( bd ) { if ( bd->bd_info->bi_db_destroy ) { bd->bd_info->bi_db_destroy( bd, NULL ); } ber_bvarray_free( bd->be_suffix ); ber_bvarray_free( bd->be_nsuffix ); if ( !BER_BVISNULL( &bd->be_rootdn ) ) { free( bd->be_rootdn.bv_val ); } if ( !BER_BVISNULL( &bd->be_rootndn ) ) { free( bd->be_rootndn.bv_val ); } if ( !BER_BVISNULL( &bd->be_rootpw ) ) { free( bd->be_rootpw.bv_val ); } acl_destroy( bd->be_acl, frontendDB->be_acl ); } return 0; } BackendInfo* backend_info(const char *type) { BackendInfo *bi; /* search for the backend type */ LDAP_STAILQ_FOREACH(bi,&backendInfo,bi_next) { if( strcasecmp(bi->bi_type, type) == 0 ) { return bi; } } return NULL; } void backend_db_insert( BackendDB *be, int idx ) { /* If idx < 0, just add to end of list */ if ( idx < 0 ) { LDAP_STAILQ_INSERT_TAIL(&backendDB, be, be_next); } else if ( idx == 0 ) { LDAP_STAILQ_INSERT_HEAD(&backendDB, be, be_next); } else { int i; BackendDB *b2; b2 = LDAP_STAILQ_FIRST(&backendDB); idx--; for (i=0; i= nbackends ) idx = -1; nbackends++; backend_db_insert( be, idx ); } be->bd_info = bi; be->be_def_limit = frontendDB->be_def_limit; be->be_dfltaccess = frontendDB->be_dfltaccess; be->be_restrictops = frontendDB->be_restrictops; be->be_requires = frontendDB->be_requires; be->be_ssf_set = frontendDB->be_ssf_set; be->be_pcl_mutexp = &be->be_pcl_mutex; ldap_pvt_thread_mutex_init( be->be_pcl_mutexp ); /* assign a default depth limit for alias deref */ be->be_max_deref_depth = SLAPD_DEFAULT_MAXDEREFDEPTH; if ( bi->bi_db_init ) { rc = bi->bi_db_init( be, cr ); } if ( rc != 0 ) { fprintf( stderr, "database init failed (%s)\n", type ); /* If we created and linked this be, remove it and free it */ if ( !b0 ) { LDAP_STAILQ_REMOVE(&backendDB, be, BackendDB, be_next); ch_free( be ); be = NULL; nbackends--; } } else { bi->bi_nDB++; } return( be ); } void be_db_close( void ) { BackendDB *be; LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) { if ( be->bd_info->bi_db_close ) { be->bd_info->bi_db_close( be, NULL ); } } if ( frontendDB->bd_info->bi_db_close ) { frontendDB->bd_info->bi_db_close( frontendDB, NULL ); } } Backend * select_backend( struct berval * dn, int noSubs ) { int j; ber_len_t len, dnlen = dn->bv_len; Backend *be; LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) { if ( be->be_nsuffix == NULL || SLAP_DBHIDDEN( be )) { continue; } for ( j = 0; !BER_BVISNULL( &be->be_nsuffix[j] ); j++ ) { if ( ( SLAP_GLUE_SUBORDINATE( be ) ) && noSubs ) { continue; } len = be->be_nsuffix[j].bv_len; if ( len > dnlen ) { /* suffix is longer than DN */ continue; } /* * input DN is normalized, so the separator check * need not look at escaping */ if ( len && len < dnlen && !DN_SEPARATOR( dn->bv_val[(dnlen-len)-1] )) { continue; } if ( strcmp( be->be_nsuffix[j].bv_val, &dn->bv_val[dnlen-len] ) == 0 ) { return be; } } } return be; } int be_issuffix( Backend *be, struct berval *bvsuffix ) { int i; if ( be->be_nsuffix == NULL ) { return 0; } for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) { if ( bvmatch( &be->be_nsuffix[i], bvsuffix ) ) { return 1; } } return 0; } int be_issubordinate( Backend *be, struct berval *bvsubordinate ) { int i; if ( be->be_nsuffix == NULL ) { return 0; } for ( i = 0; !BER_BVISNULL( &be->be_nsuffix[i] ); i++ ) { if ( dnIsSuffix( bvsubordinate, &be->be_nsuffix[i] ) ) { return 1; } } return 0; } int be_isroot_dn( Backend *be, struct berval *ndn ) { if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_rootndn ) ) { return 0; } return dn_match( &be->be_rootndn, ndn ); } int be_slurp_update( Operation *op ) { return ( SLAP_SLURP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ); } int be_shadow_update( Operation *op ) { /* This assumes that all internal ops (connid == -1) on a syncrepl * database are syncrepl operations. */ return (( SLAP_SYNC_SHADOW( op->o_bd ) && op->o_connid == -1 ) || ( SLAP_SHADOW( op->o_bd ) && be_isupdate_dn( op->o_bd, &op->o_ndn ) ) ); } int be_isupdate_dn( Backend *be, struct berval *ndn ) { if ( BER_BVISEMPTY( ndn ) || BER_BVISEMPTY( &be->be_update_ndn ) ) { return 0; } return dn_match( &be->be_update_ndn, ndn ); } struct berval * be_root_dn( Backend *be ) { return &be->be_rootdn; } int be_isroot( Operation *op ) { return be_isroot_dn( op->o_bd, &op->o_ndn ); } int be_isroot_pw( Operation *op ) { return be_rootdn_bind( op, NULL ) == LDAP_SUCCESS; } /* * checks if binding as rootdn * * return value: * SLAP_CB_CONTINUE if not the rootdn, or if rootpw is null * LDAP_SUCCESS if rootdn & rootpw * LDAP_INVALID_CREDENTIALS if rootdn & !rootpw * * if rs != NULL * if LDAP_SUCCESS, op->orb_edn is set * if LDAP_INVALID_CREDENTIALS, response is sent to client */ int be_rootdn_bind( Operation *op, SlapReply *rs ) { int rc; #ifdef SLAPD_SPASSWD void *old_authctx = NULL; #endif assert( op->o_tag == LDAP_REQ_BIND ); assert( op->orb_method == LDAP_AUTH_SIMPLE ); if ( !be_isroot_dn( op->o_bd, &op->o_req_ndn ) ) { return SLAP_CB_CONTINUE; } if ( BER_BVISNULL( &op->o_bd->be_rootpw ) ) { /* give the database a chance */ return SLAP_CB_CONTINUE; } if ( BER_BVISEMPTY( &op->o_bd->be_rootpw ) ) { /* rootdn bind explicitly disallowed */ rc = LDAP_INVALID_CREDENTIALS; if ( rs ) { goto send_result; } return rc; } #ifdef SLAPD_SPASSWD ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind, op->o_conn->c_sasl_authctx, 0, &old_authctx, NULL ); #endif rc = lutil_passwd( &op->o_bd->be_rootpw, &op->orb_cred, NULL, NULL ); #ifdef SLAPD_SPASSWD ldap_pvt_thread_pool_setkey( op->o_threadctx, (void *)slap_sasl_bind, old_authctx, 0, NULL, NULL ); #endif rc = ( rc == 0 ? LDAP_SUCCESS : LDAP_INVALID_CREDENTIALS ); if ( rs ) { send_result:; rs->sr_err = rc; Debug( LDAP_DEBUG_TRACE, "%s: rootdn=\"%s\" bind%s\n", op->o_log_prefix, op->o_bd->be_rootdn.bv_val, rc == LDAP_SUCCESS ? " succeeded" : " failed" ); if ( rc == LDAP_SUCCESS ) { /* Set to the pretty rootdn */ ber_dupbv( &op->orb_edn, &op->o_bd->be_rootdn ); } else { send_ldap_result( op, rs ); } } return rc; } int be_entry_release_rw( Operation *op, Entry *e, int rw ) { if ( op->o_bd->be_release ) { /* free and release entry from backend */ return op->o_bd->be_release( op, e, rw ); } else { /* free entry */ entry_free( e ); return 0; } } int backend_unbind( Operation *op, SlapReply *rs ) { BackendDB *be; LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) { if ( be->be_unbind ) { op->o_bd = be; be->be_unbind( op, rs ); } } return 0; } int backend_connection_init( Connection *conn ) { BackendDB *be; LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) { if ( be->be_connection_init ) { be->be_connection_init( be, conn ); } } return 0; } int backend_connection_destroy( Connection *conn ) { BackendDB *be; LDAP_STAILQ_FOREACH( be, &backendDB, be_next ) { if ( be->be_connection_destroy ) { be->be_connection_destroy( be, conn); } } return 0; } int backend_check_controls( Operation *op, SlapReply *rs ) { LDAPControl **ctrls = op->o_ctrls; rs->sr_err = LDAP_SUCCESS; if( ctrls ) { for( ; *ctrls != NULL ; ctrls++ ) { int cid; switch ( slap_global_control( op, (*ctrls)->ldctl_oid, &cid ) ) { case LDAP_CONTROL_NOT_FOUND: /* unrecognized control */ if ( (*ctrls)->ldctl_iscritical ) { /* should not be reachable */ Debug( LDAP_DEBUG_ANY, "backend_check_controls: " "unrecognized critical control: %s\n", (*ctrls)->ldctl_oid, 0, 0 ); assert( 0 ); } else { Debug( LDAP_DEBUG_TRACE, "backend_check_controls: " "unrecognized non-critical control: %s\n", (*ctrls)->ldctl_oid, 0, 0 ); } break; case LDAP_COMPARE_FALSE: if ( !op->o_bd->be_ctrls[cid] && (*ctrls)->ldctl_iscritical ) { /* RFC 4511 allows unavailableCriticalExtension to be * returned when the server is unwilling to perform * an operation extended by a recognized critical * control. */ rs->sr_text = "critical control unavailable in context"; rs->sr_err = LDAP_UNAVAILABLE_CRITICAL_EXTENSION; goto done; } break; case LDAP_COMPARE_TRUE: break; default: /* unreachable */ Debug( LDAP_DEBUG_ANY, "backend_check_controls: unable to check control: %s\n", (*ctrls)->ldctl_oid, 0, 0 ); assert( 0 ); rs->sr_text = "unable to check control"; rs->sr_err = LDAP_OTHER; goto done; } } } #if 0 /* temporarily removed */ /* check should be generalized */ if( get_relax(op) && !be_isroot(op)) { rs->sr_text = "requires manager authorization"; rs->sr_err = LDAP_UNWILLING_TO_PERFORM; } #endif done:; return rs->sr_err; } int backend_check_restrictions( Operation *op, SlapReply *rs, struct berval *opdata ) { slap_mask_t restrictops; slap_mask_t requires; slap_mask_t opflag; slap_mask_t exopflag = 0; slap_ssf_set_t *ssf; int updateop = 0; int starttls = 0; int session = 0; if ( op->o_bd ) { int rc = SLAP_CB_CONTINUE; if ( op->o_bd->be_chk_controls ) { rc = ( *op->o_bd->be_chk_controls )( op, rs ); } if ( rc == SLAP_CB_CONTINUE ) { rc = backend_check_controls( op, rs ); } if ( rc != LDAP_SUCCESS ) { return rs->sr_err; } restrictops = op->o_bd->be_restrictops; requires = op->o_bd->be_requires; ssf = &op->o_bd->be_ssf_set; } else { restrictops = frontendDB->be_restrictops; requires = frontendDB->be_requires; ssf = &frontendDB->be_ssf_set; } switch( op->o_tag ) { case LDAP_REQ_ADD: opflag = SLAP_RESTRICT_OP_ADD; updateop++; break; case LDAP_REQ_BIND: opflag = SLAP_RESTRICT_OP_BIND; session++; break; case LDAP_REQ_COMPARE: opflag = SLAP_RESTRICT_OP_COMPARE; break; case LDAP_REQ_DELETE: updateop++; opflag = SLAP_RESTRICT_OP_DELETE; break; case LDAP_REQ_EXTENDED: opflag = SLAP_RESTRICT_OP_EXTENDED; if( !opdata ) { /* treat unspecified as a modify */ opflag = SLAP_RESTRICT_OP_MODIFY; updateop++; break; } if( bvmatch( opdata, &slap_EXOP_START_TLS ) ) { session++; starttls++; exopflag = SLAP_RESTRICT_EXOP_START_TLS; break; } if( bvmatch( opdata, &slap_EXOP_WHOAMI ) ) { exopflag = SLAP_RESTRICT_EXOP_WHOAMI; break; } if ( bvmatch( opdata, &slap_EXOP_CANCEL ) ) { exopflag = SLAP_RESTRICT_EXOP_CANCEL; break; } if ( bvmatch( opdata, &slap_EXOP_MODIFY_PASSWD ) ) { exopflag = SLAP_RESTRICT_EXOP_MODIFY_PASSWD; updateop++; break; } /* treat everything else as a modify */ opflag = SLAP_RESTRICT_OP_MODIFY; updateop++; break; case LDAP_REQ_MODIFY: updateop++; opflag = SLAP_RESTRICT_OP_MODIFY; break; case LDAP_REQ_RENAME: updateop++; opflag = SLAP_RESTRICT_OP_RENAME; break; case LDAP_REQ_SEARCH: opflag = SLAP_RESTRICT_OP_SEARCH; break; case LDAP_REQ_UNBIND: session++; opflag = 0; break; default: rs->sr_text = "restrict operations internal error"; rs->sr_err = LDAP_OTHER; return rs->sr_err; } if ( !starttls ) { /* these checks don't apply to StartTLS */ rs->sr_err = LDAP_CONFIDENTIALITY_REQUIRED; if( op->o_transport_ssf < ssf->sss_transport ) { rs->sr_text = op->o_transport_ssf ? "stronger transport confidentiality required" : "transport confidentiality required"; return rs->sr_err; } if( op->o_tls_ssf < ssf->sss_tls ) { rs->sr_text = op->o_tls_ssf ? "stronger TLS confidentiality required" : "TLS confidentiality required"; return rs->sr_err; } if( op->o_tag == LDAP_REQ_BIND && opdata == NULL ) { /* simple bind specific check */ if( op->o_ssf < ssf->sss_simple_bind ) { rs->sr_text = op->o_ssf ? "stronger confidentiality required" : "confidentiality required"; return rs->sr_err; } } if( op->o_tag != LDAP_REQ_BIND || opdata == NULL ) { /* these checks don't apply to SASL bind */ if( op->o_sasl_ssf < ssf->sss_sasl ) { rs->sr_text = op->o_sasl_ssf ? "stronger SASL confidentiality required" : "SASL confidentiality required"; return rs->sr_err; } if( op->o_ssf < ssf->sss_ssf ) { rs->sr_text = op->o_ssf ? "stronger confidentiality required" : "confidentiality required"; return rs->sr_err; } } if( updateop ) { if( op->o_transport_ssf < ssf->sss_update_transport ) { rs->sr_text = op->o_transport_ssf ? "stronger transport confidentiality required for update" : "transport confidentiality required for update"; return rs->sr_err; } if( op->o_tls_ssf < ssf->sss_update_tls ) { rs->sr_text = op->o_tls_ssf ? "stronger TLS confidentiality required for update" : "TLS confidentiality required for update"; return rs->sr_err; } if( op->o_sasl_ssf < ssf->sss_update_sasl ) { rs->sr_text = op->o_sasl_ssf ? "stronger SASL confidentiality required for update" : "SASL confidentiality required for update"; return rs->sr_err; } if( op->o_ssf < ssf->sss_update_ssf ) { rs->sr_text = op->o_ssf ? "stronger confidentiality required for update" : "confidentiality required for update"; return rs->sr_err; } if( !( global_allows & SLAP_ALLOW_UPDATE_ANON ) && BER_BVISEMPTY( &op->o_ndn ) ) { rs->sr_text = "modifications require authentication"; rs->sr_err = LDAP_STRONG_AUTH_REQUIRED; return rs->sr_err; } #ifdef SLAP_X_LISTENER_MOD if ( op->o_conn->c_listener && ! ( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_ndn ) ? (S_IWUSR|S_IWOTH) : S_IWOTH ) ) ) { /* no "w" mode means readonly */ rs->sr_text = "modifications not allowed on this listener"; rs->sr_err = LDAP_UNWILLING_TO_PERFORM; return rs->sr_err; } #endif /* SLAP_X_LISTENER_MOD */ } } if ( !session ) { /* these checks don't apply to Bind, StartTLS, or Unbind */ if( requires & SLAP_REQUIRE_STRONG ) { /* should check mechanism */ if( ( op->o_transport_ssf < ssf->sss_transport && op->o_authtype == LDAP_AUTH_SIMPLE ) || BER_BVISEMPTY( &op->o_dn ) ) { rs->sr_text = "strong(er) authentication required"; rs->sr_err = LDAP_STRONG_AUTH_REQUIRED; return rs->sr_err; } } if( requires & SLAP_REQUIRE_SASL ) { if( op->o_authtype != LDAP_AUTH_SASL || BER_BVISEMPTY( &op->o_dn ) ) { rs->sr_text = "SASL authentication required"; rs->sr_err = LDAP_STRONG_AUTH_REQUIRED; return rs->sr_err; } } if( requires & SLAP_REQUIRE_AUTHC ) { if( BER_BVISEMPTY( &op->o_dn ) ) { rs->sr_text = "authentication required"; rs->sr_err = LDAP_UNWILLING_TO_PERFORM; return rs->sr_err; } } if( requires & SLAP_REQUIRE_BIND ) { int version; ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex ); version = op->o_conn->c_protocol; ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex ); if( !version ) { /* no bind has occurred */ rs->sr_text = "BIND required"; rs->sr_err = LDAP_OPERATIONS_ERROR; return rs->sr_err; } } if( requires & SLAP_REQUIRE_LDAP_V3 ) { if( op->o_protocol < LDAP_VERSION3 ) { /* no bind has occurred */ rs->sr_text = "operation restricted to LDAPv3 clients"; rs->sr_err = LDAP_OPERATIONS_ERROR; return rs->sr_err; } } #ifdef SLAP_X_LISTENER_MOD if ( !starttls && BER_BVISEMPTY( &op->o_dn ) ) { if ( op->o_conn->c_listener && !( op->o_conn->c_listener->sl_perms & S_IXOTH )) { /* no "x" mode means bind required */ rs->sr_text = "bind required on this listener"; rs->sr_err = LDAP_STRONG_AUTH_REQUIRED; return rs->sr_err; } } if ( !starttls && !updateop ) { if ( op->o_conn->c_listener && !( op->o_conn->c_listener->sl_perms & ( !BER_BVISEMPTY( &op->o_dn ) ? (S_IRUSR|S_IROTH) : S_IROTH ))) { /* no "r" mode means no read */ rs->sr_text = "read not allowed on this listener"; rs->sr_err = LDAP_UNWILLING_TO_PERFORM; return rs->sr_err; } } #endif /* SLAP_X_LISTENER_MOD */ } if( ( restrictops & opflag ) || ( exopflag && ( restrictops & exopflag ) ) ) { if( ( restrictops & SLAP_RESTRICT_OP_MASK) == SLAP_RESTRICT_OP_READS ) { rs->sr_text = "read operations restricted"; } else if ( restrictops & exopflag ) { rs->sr_text = "extended operation restricted"; } else { rs->sr_text = "operation restricted"; } rs->sr_err = LDAP_UNWILLING_TO_PERFORM; return rs->sr_err; } rs->sr_err = LDAP_SUCCESS; return rs->sr_err; } int backend_check_referrals( Operation *op, SlapReply *rs ) { rs->sr_err = LDAP_SUCCESS; if( op->o_bd->be_chk_referrals ) { rs->sr_err = op->o_bd->be_chk_referrals( op, rs ); if( rs->sr_err != LDAP_SUCCESS && rs->sr_err != LDAP_REFERRAL ) { send_ldap_result( op, rs ); } } return rs->sr_err; } int be_entry_get_rw( Operation *op, struct berval *ndn, ObjectClass *oc, AttributeDescription *at, int rw, Entry **e ) { *e = NULL; if ( op->o_bd == NULL ) { return LDAP_NO_SUCH_OBJECT; } if ( op->o_bd->be_fetch ) { return op->o_bd->be_fetch( op, ndn, oc, at, rw, e ); } return LDAP_UNWILLING_TO_PERFORM; } int fe_acl_group( Operation *op, Entry *target, struct berval *gr_ndn, struct berval *op_ndn, ObjectClass *group_oc, AttributeDescription *group_at ) { Entry *e; void *o_priv = op->o_private, *e_priv = NULL; Attribute *a; int rc; GroupAssertion *g; Backend *be = op->o_bd; op->o_bd = select_backend( gr_ndn, 0 ); for ( g = op->o_groups; g; g = g->ga_next ) { if ( g->ga_be != op->o_bd || g->ga_oc != group_oc || g->ga_at != group_at || g->ga_len != gr_ndn->bv_len ) { continue; } if ( strcmp( g->ga_ndn, gr_ndn->bv_val ) == 0 ) { break; } } if ( g ) { rc = g->ga_res; goto done; } if ( target && dn_match( &target->e_nname, gr_ndn ) ) { e = target; rc = 0; } else { op->o_private = NULL; rc = be_entry_get_rw( op, gr_ndn, group_oc, group_at, 0, &e ); e_priv = op->o_private; op->o_private = o_priv; } if ( e ) { a = attr_find( e->e_attrs, group_at ); if ( a ) { /* If the attribute is a subtype of labeledURI, * treat this as a dynamic group ala groupOfURLs */ if ( is_at_subtype( group_at->ad_type, slap_schema.si_ad_labeledURI->ad_type ) ) { int i; LDAPURLDesc *ludp; struct berval bv, nbase; Filter *filter; Entry *user = NULL; void *user_priv = NULL; Backend *b2 = op->o_bd; if ( target && dn_match( &target->e_nname, op_ndn ) ) { user = target; } rc = LDAP_COMPARE_FALSE; for ( i = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) { if ( ldap_url_parse( a->a_vals[i].bv_val, &ludp ) != LDAP_URL_SUCCESS ) { continue; } BER_BVZERO( &nbase ); /* host, attrs and extensions parts must be empty */ if ( ( ludp->lud_host && *ludp->lud_host ) || ludp->lud_attrs || ludp->lud_exts ) { goto loopit; } ber_str2bv( ludp->lud_dn, 0, 0, &bv ); if ( dnNormalize( 0, NULL, NULL, &bv, &nbase, op->o_tmpmemctx ) != LDAP_SUCCESS ) { goto loopit; } switch ( ludp->lud_scope ) { case LDAP_SCOPE_BASE: if ( !dn_match( &nbase, op_ndn ) ) { goto loopit; } break; case LDAP_SCOPE_ONELEVEL: dnParent( op_ndn, &bv ); if ( !dn_match( &nbase, &bv ) ) { goto loopit; } break; case LDAP_SCOPE_SUBTREE: if ( !dnIsSuffix( op_ndn, &nbase ) ) { goto loopit; } break; case LDAP_SCOPE_SUBORDINATE: if ( dn_match( &nbase, op_ndn ) || !dnIsSuffix( op_ndn, &nbase ) ) { goto loopit; } } /* NOTE: this could be NULL * if no filter is provided, * or if filter parsing fails. * In the latter case, * we should give up. */ if ( ludp->lud_filter != NULL && ludp->lud_filter != '\0') { filter = str2filter_x( op, ludp->lud_filter ); if ( filter == NULL ) { /* give up... */ rc = LDAP_OTHER; goto loopit; } /* only get user if required * and not available yet */ if ( user == NULL ) { int rc2; op->o_bd = select_backend( op_ndn, 0 ); op->o_private = NULL; rc2 = be_entry_get_rw( op, op_ndn, NULL, NULL, 0, &user ); user_priv = op->o_private; op->o_private = o_priv; if ( rc2 != 0 ) { /* give up... */ rc = LDAP_OTHER; goto loopit; } } if ( test_filter( NULL, user, filter ) == LDAP_COMPARE_TRUE ) { rc = 0; } filter_free_x( op, filter ); } loopit: ldap_free_urldesc( ludp ); if ( !BER_BVISNULL( &nbase ) ) { op->o_tmpfree( nbase.bv_val, op->o_tmpmemctx ); } if ( rc != LDAP_COMPARE_FALSE ) { break; } } if ( user != NULL && user != target ) { op->o_private = user_priv; be_entry_release_r( op, user ); op->o_private = o_priv; } op->o_bd = b2; } else { rc = attr_valfind( a, SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH | SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH, op_ndn, NULL, op->o_tmpmemctx ); if ( rc == LDAP_NO_SUCH_ATTRIBUTE ) { rc = LDAP_COMPARE_FALSE; } } } else { rc = LDAP_NO_SUCH_ATTRIBUTE; } if ( e != target ) { op->o_private = e_priv; be_entry_release_r( op, e ); op->o_private = o_priv; } } else { rc = LDAP_NO_SUCH_OBJECT; } if ( op->o_tag != LDAP_REQ_BIND && !op->o_do_not_cache ) { g = op->o_tmpalloc( sizeof( GroupAssertion ) + gr_ndn->bv_len, op->o_tmpmemctx ); g->ga_be = op->o_bd; g->ga_oc = group_oc; g->ga_at = group_at; g->ga_res = rc; g->ga_len = gr_ndn->bv_len; strcpy( g->ga_ndn, gr_ndn->bv_val ); g->ga_next = op->o_groups; op->o_groups = g; } done: op->o_bd = be; return rc; } int backend_group( Operation *op, Entry *target, struct berval *gr_ndn, struct berval *op_ndn, ObjectClass *group_oc, AttributeDescription *group_at ) { int rc; BackendDB *be_orig; if ( op->o_abandon ) { return SLAPD_ABANDON; } be_orig = op->o_bd; op->o_bd = frontendDB; rc = frontendDB->be_group( op, target, gr_ndn, op_ndn, group_oc, group_at ); op->o_bd = be_orig; return rc; } int fe_acl_attribute( Operation *op, Entry *target, struct berval *edn, AttributeDescription *entry_at, BerVarray *vals, slap_access_t access ) { Entry *e = NULL; void *o_priv = op->o_private, *e_priv = NULL; Attribute *a = NULL; int freeattr = 0, i, j, rc = LDAP_SUCCESS; AccessControlState acl_state = ACL_STATE_INIT; Backend *be = op->o_bd; op->o_bd = select_backend( edn, 0 ); if ( target && dn_match( &target->e_nname, edn ) ) { e = target; } else { op->o_private = NULL; rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e ); e_priv = op->o_private; op->o_private = o_priv; } if ( e ) { if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) { assert( vals == NULL ); rc = LDAP_SUCCESS; if ( op->o_conn && access > ACL_NONE && access_allowed( op, e, entry_at, NULL, access, &acl_state ) == 0 ) { rc = LDAP_INSUFFICIENT_ACCESS; } goto freeit; } a = attr_find( e->e_attrs, entry_at ); if ( a == NULL ) { SlapReply rs = { 0 }; AttributeName anlist[ 2 ]; anlist[ 0 ].an_name = entry_at->ad_cname; anlist[ 0 ].an_desc = entry_at; BER_BVZERO( &anlist[ 1 ].an_name ); rs.sr_attrs = anlist; /* NOTE: backend_operational() is also called * when returning results, so it's supposed * to do no harm to entries */ rs.sr_entry = e; rc = backend_operational( op, &rs ); rs.sr_entry = NULL; if ( rc == LDAP_SUCCESS ) { if ( rs.sr_operational_attrs ) { freeattr = 1; a = rs.sr_operational_attrs; } else { rc = LDAP_NO_SUCH_ATTRIBUTE; } } } if ( a ) { BerVarray v; if ( op->o_conn && access > ACL_NONE && access_allowed( op, e, entry_at, NULL, access, &acl_state ) == 0 ) { rc = LDAP_INSUFFICIENT_ACCESS; goto freeit; } i = a->a_numvals; v = op->o_tmpalloc( sizeof(struct berval) * ( i + 1 ), op->o_tmpmemctx ); for ( i = 0, j = 0; !BER_BVISNULL( &a->a_vals[i] ); i++ ) { if ( op->o_conn && access > ACL_NONE && access_allowed( op, e, entry_at, &a->a_nvals[i], access, &acl_state ) == 0 ) { continue; } ber_dupbv_x( &v[j], &a->a_nvals[i], op->o_tmpmemctx ); if ( !BER_BVISNULL( &v[j] ) ) { j++; } } if ( j == 0 ) { op->o_tmpfree( v, op->o_tmpmemctx ); *vals = NULL; rc = LDAP_INSUFFICIENT_ACCESS; } else { BER_BVZERO( &v[j] ); *vals = v; rc = LDAP_SUCCESS; } } freeit: if ( e != target ) { op->o_private = e_priv; be_entry_release_r( op, e ); op->o_private = o_priv; } if ( freeattr ) { attr_free( a ); } } op->o_bd = be; return rc; } int backend_attribute( Operation *op, Entry *target, struct berval *edn, AttributeDescription *entry_at, BerVarray *vals, slap_access_t access ) { int rc; BackendDB *be_orig; be_orig = op->o_bd; op->o_bd = frontendDB; rc = frontendDB->be_attribute( op, target, edn, entry_at, vals, access ); op->o_bd = be_orig; return rc; } int backend_access( Operation *op, Entry *target, struct berval *edn, AttributeDescription *entry_at, struct berval *nval, slap_access_t access, slap_mask_t *mask ) { Entry *e = NULL; void *o_priv = op->o_private, *e_priv = NULL; int rc = LDAP_INSUFFICIENT_ACCESS; Backend *be = op->o_bd; /* pedantic */ assert( op != NULL ); assert( op->o_conn != NULL ); assert( edn != NULL ); assert( access > ACL_NONE ); op->o_bd = select_backend( edn, 0 ); if ( target && dn_match( &target->e_nname, edn ) ) { e = target; } else { op->o_private = NULL; rc = be_entry_get_rw( op, edn, NULL, entry_at, 0, &e ); e_priv = op->o_private; op->o_private = o_priv; } if ( e ) { Attribute *a = NULL; int freeattr = 0; if ( entry_at == NULL ) { entry_at = slap_schema.si_ad_entry; } if ( entry_at == slap_schema.si_ad_entry || entry_at == slap_schema.si_ad_children ) { if ( access_allowed_mask( op, e, entry_at, NULL, access, NULL, mask ) == 0 ) { rc = LDAP_INSUFFICIENT_ACCESS; } else { rc = LDAP_SUCCESS; } } else { a = attr_find( e->e_attrs, entry_at ); if ( a == NULL ) { SlapReply rs = { 0 }; AttributeName anlist[ 2 ]; anlist[ 0 ].an_name = entry_at->ad_cname; anlist[ 0 ].an_desc = entry_at; BER_BVZERO( &anlist[ 1 ].an_name ); rs.sr_attrs = anlist; rs.sr_attr_flags = slap_attr_flags( rs.sr_attrs ); /* NOTE: backend_operational() is also called * when returning results, so it's supposed * to do no harm to entries */ rs.sr_entry = e; rc = backend_operational( op, &rs ); rs.sr_entry = NULL; if ( rc == LDAP_SUCCESS ) { if ( rs.sr_operational_attrs ) { freeattr = 1; a = rs.sr_operational_attrs; } else { rc = LDAP_NO_SUCH_OBJECT; } } } if ( a ) { if ( access_allowed_mask( op, e, entry_at, nval, access, NULL, mask ) == 0 ) { rc = LDAP_INSUFFICIENT_ACCESS; goto freeit; } rc = LDAP_SUCCESS; } } freeit: if ( e != target ) { op->o_private = e_priv; be_entry_release_r( op, e ); op->o_private = o_priv; } if ( freeattr ) { attr_free( a ); } } op->o_bd = be; return rc; } int fe_aux_operational( Operation *op, SlapReply *rs ) { Attribute **ap; int rc = LDAP_SUCCESS; for ( ap = &rs->sr_operational_attrs; *ap; ap = &(*ap)->a_next ) /* just count them */ ; /* * If operational attributes (allegedly) are required, * and the backend supports specific operational attributes, * add them to the attribute list */ if ( !( rs->sr_flags & REP_NO_ENTRYDN ) && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs && ad_inlist( slap_schema.si_ad_entryDN, rs->sr_attrs ) ) ) ) { *ap = slap_operational_entryDN( rs->sr_entry ); ap = &(*ap)->a_next; } if ( !( rs->sr_flags & REP_NO_SUBSCHEMA) && ( SLAP_OPATTRS( rs->sr_attr_flags ) || ( rs->sr_attrs && ad_inlist( slap_schema.si_ad_subschemaSubentry, rs->sr_attrs ) ) ) ) { *ap = slap_operational_subschemaSubentry( op->o_bd ); ap = &(*ap)->a_next; } if ( op->o_bd != NULL ) { BackendDB *be_orig = op->o_bd; /* Let the overlays have a chance at this */ op->o_bd = select_backend( &op->o_req_ndn, 0 ); if ( op->o_bd != NULL && !be_match( op->o_bd, frontendDB ) && ( SLAP_OPATTRS( rs->sr_attr_flags ) || rs->sr_attrs ) && op->o_bd->be_operational != NULL ) { rc = op->o_bd->be_operational( op, rs ); } op->o_bd = be_orig; } return rc; } int backend_operational( Operation *op, SlapReply *rs ) { int rc; BackendDB *be_orig; /* Moved this into the frontend so global overlays are called */ be_orig = op->o_bd; op->o_bd = frontendDB; rc = frontendDB->be_operational( op, rs ); op->o_bd = be_orig; return rc; }