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410 lines
10 KiB
C
410 lines
10 KiB
C
/* $OpenLDAP$ */
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/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
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*
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* Copyright 1998-2017 The OpenLDAP Foundation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted only as authorized by the OpenLDAP
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* Public License.
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*
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* A copy of this license is available in the file LICENSE in the
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* top-level directory of the distribution or, alternatively, at
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* <http://www.OpenLDAP.org/license.html>.
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*/
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/* Portions Copyright (c) 1995 Regents of the University of Michigan.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that this notice is preserved and that due credit is given
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* to the University of Michigan at Ann Arbor. The name of the University
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* may not be used to endorse or promote products derived from this
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* software without specific prior written permission. This software
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* is provided ``as is'' without express or implied warranty.
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/socket.h>
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#include <ac/string.h>
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#include "slap.h"
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int
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do_compare(
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Operation *op,
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SlapReply *rs )
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{
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struct berval dn = BER_BVNULL;
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struct berval desc = BER_BVNULL;
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struct berval value = BER_BVNULL;
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AttributeAssertion ava = ATTRIBUTEASSERTION_INIT;
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Debug( LDAP_DEBUG_TRACE, "%s do_compare\n",
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op->o_log_prefix, 0, 0 );
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/*
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* Parse the compare request. It looks like this:
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*
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* CompareRequest := [APPLICATION 14] SEQUENCE {
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* entry DistinguishedName,
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* ava SEQUENCE {
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* type AttributeType,
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* value AttributeValue
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* }
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* }
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*/
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if ( ber_scanf( op->o_ber, "{m" /*}*/, &dn ) == LBER_ERROR ) {
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Debug( LDAP_DEBUG_ANY, "%s do_compare: ber_scanf failed\n",
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op->o_log_prefix, 0, 0 );
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send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
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return SLAPD_DISCONNECT;
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}
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if ( ber_scanf( op->o_ber, "{mm}", &desc, &value ) == LBER_ERROR ) {
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Debug( LDAP_DEBUG_ANY, "%s do_compare: get ava failed\n",
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op->o_log_prefix, 0, 0 );
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send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
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return SLAPD_DISCONNECT;
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}
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if ( ber_scanf( op->o_ber, /*{*/ "}" ) == LBER_ERROR ) {
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Debug( LDAP_DEBUG_ANY, "%s do_compare: ber_scanf failed\n",
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op->o_log_prefix, 0, 0 );
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send_ldap_discon( op, rs, LDAP_PROTOCOL_ERROR, "decoding error" );
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return SLAPD_DISCONNECT;
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}
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if( get_ctrls( op, rs, 1 ) != LDAP_SUCCESS ) {
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Debug( LDAP_DEBUG_ANY, "%s do_compare: get_ctrls failed\n",
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op->o_log_prefix, 0, 0 );
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goto cleanup;
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}
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rs->sr_err = dnPrettyNormal( NULL, &dn, &op->o_req_dn, &op->o_req_ndn,
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op->o_tmpmemctx );
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if( rs->sr_err != LDAP_SUCCESS ) {
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Debug( LDAP_DEBUG_ANY, "%s do_compare: invalid dn (%s)\n",
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op->o_log_prefix, dn.bv_val, 0 );
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send_ldap_error( op, rs, LDAP_INVALID_DN_SYNTAX, "invalid DN" );
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goto cleanup;
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}
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Statslog( LDAP_DEBUG_STATS,
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"%s CMP dn=\"%s\" attr=\"%s\"\n",
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op->o_log_prefix, op->o_req_dn.bv_val,
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desc.bv_val, 0, 0 );
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rs->sr_err = slap_bv2ad( &desc, &ava.aa_desc, &rs->sr_text );
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if( rs->sr_err != LDAP_SUCCESS ) {
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rs->sr_err = slap_bv2undef_ad( &desc, &ava.aa_desc,
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&rs->sr_text,
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SLAP_AD_PROXIED|SLAP_AD_NOINSERT );
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if( rs->sr_err != LDAP_SUCCESS ) {
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send_ldap_result( op, rs );
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goto cleanup;
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}
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}
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rs->sr_err = asserted_value_validate_normalize( ava.aa_desc,
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ava.aa_desc->ad_type->sat_equality,
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SLAP_MR_EQUALITY|SLAP_MR_VALUE_OF_ASSERTION_SYNTAX,
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&value, &ava.aa_value, &rs->sr_text, op->o_tmpmemctx );
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if( rs->sr_err != LDAP_SUCCESS ) {
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send_ldap_result( op, rs );
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goto cleanup;
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}
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op->orc_ava = &ava;
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Debug( LDAP_DEBUG_ARGS,
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"do_compare: dn (%s) attr (%s) value (%s)\n",
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op->o_req_dn.bv_val,
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ava.aa_desc->ad_cname.bv_val, ava.aa_value.bv_val );
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op->o_bd = frontendDB;
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rs->sr_err = frontendDB->be_compare( op, rs );
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cleanup:;
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op->o_tmpfree( op->o_req_dn.bv_val, op->o_tmpmemctx );
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op->o_tmpfree( op->o_req_ndn.bv_val, op->o_tmpmemctx );
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if ( !BER_BVISNULL( &ava.aa_value ) ) {
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op->o_tmpfree( ava.aa_value.bv_val, op->o_tmpmemctx );
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}
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return rs->sr_err;
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}
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int
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fe_op_compare( Operation *op, SlapReply *rs )
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{
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Entry *entry = NULL;
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AttributeAssertion *ava = op->orc_ava;
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BackendDB *bd = op->o_bd;
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if( strcasecmp( op->o_req_ndn.bv_val, LDAP_ROOT_DSE ) == 0 ) {
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if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
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send_ldap_result( op, rs );
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goto cleanup;
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}
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rs->sr_err = root_dse_info( op->o_conn, &entry, &rs->sr_text );
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if( rs->sr_err != LDAP_SUCCESS ) {
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send_ldap_result( op, rs );
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goto cleanup;
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}
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} else if ( bvmatch( &op->o_req_ndn, &frontendDB->be_schemandn ) ) {
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if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
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send_ldap_result( op, rs );
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rs->sr_err = 0;
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goto cleanup;
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}
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rs->sr_err = schema_info( &entry, &rs->sr_text );
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if( rs->sr_err != LDAP_SUCCESS ) {
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send_ldap_result( op, rs );
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rs->sr_err = 0;
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goto cleanup;
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}
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}
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if( entry ) {
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rs->sr_err = slap_compare_entry( op, entry, ava );
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entry_free( entry );
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send_ldap_result( op, rs );
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if( rs->sr_err == LDAP_COMPARE_TRUE ||
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rs->sr_err == LDAP_COMPARE_FALSE )
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{
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rs->sr_err = LDAP_SUCCESS;
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}
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goto cleanup;
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}
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/*
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* We could be serving multiple database backends. Select the
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* appropriate one, or send a referral to our "referral server"
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* if we don't hold it.
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*/
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op->o_bd = select_backend( &op->o_req_ndn, 0 );
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if ( op->o_bd == NULL ) {
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rs->sr_ref = referral_rewrite( default_referral,
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NULL, &op->o_req_dn, LDAP_SCOPE_DEFAULT );
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rs->sr_err = LDAP_REFERRAL;
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if (!rs->sr_ref) rs->sr_ref = default_referral;
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op->o_bd = bd;
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send_ldap_result( op, rs );
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if (rs->sr_ref != default_referral) ber_bvarray_free( rs->sr_ref );
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rs->sr_err = 0;
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goto cleanup;
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}
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/* check restrictions */
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if( backend_check_restrictions( op, rs, NULL ) != LDAP_SUCCESS ) {
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send_ldap_result( op, rs );
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goto cleanup;
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}
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/* check for referrals */
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if( backend_check_referrals( op, rs ) != LDAP_SUCCESS ) {
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goto cleanup;
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}
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if ( SLAP_SHADOW(op->o_bd) && get_dontUseCopy(op) ) {
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/* don't use shadow copy */
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send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
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"copy not used" );
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} else if ( ava->aa_desc == slap_schema.si_ad_entryDN ) {
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send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
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"entryDN compare not supported" );
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} else if ( ava->aa_desc == slap_schema.si_ad_subschemaSubentry ) {
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send_ldap_error( op, rs, LDAP_UNWILLING_TO_PERFORM,
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"subschemaSubentry compare not supported" );
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#ifndef SLAP_COMPARE_IN_FRONTEND
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} else if ( ava->aa_desc == slap_schema.si_ad_hasSubordinates
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&& op->o_bd->be_has_subordinates )
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{
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int rc, hasSubordinates = LDAP_SUCCESS;
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rc = be_entry_get_rw( op, &op->o_req_ndn, NULL, NULL, 0, &entry );
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if ( rc == 0 && entry ) {
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if ( ! access_allowed( op, entry,
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ava->aa_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
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{
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rc = rs->sr_err = LDAP_INSUFFICIENT_ACCESS;
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} else {
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rc = rs->sr_err = op->o_bd->be_has_subordinates( op,
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entry, &hasSubordinates );
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be_entry_release_r( op, entry );
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}
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}
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if ( rc == 0 ) {
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int asserted;
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asserted = bvmatch( &ava->aa_value, &slap_true_bv )
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? LDAP_COMPARE_TRUE : LDAP_COMPARE_FALSE;
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if ( hasSubordinates == asserted ) {
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rs->sr_err = LDAP_COMPARE_TRUE;
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} else {
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rs->sr_err = LDAP_COMPARE_FALSE;
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}
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} else {
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/* return error only if "disclose"
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* is granted on the object */
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if ( backend_access( op, NULL, &op->o_req_ndn,
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slap_schema.si_ad_entry,
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NULL, ACL_DISCLOSE, NULL ) == LDAP_INSUFFICIENT_ACCESS )
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{
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rs->sr_err = LDAP_NO_SUCH_OBJECT;
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}
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}
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send_ldap_result( op, rs );
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if ( rc == 0 ) {
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rs->sr_err = LDAP_SUCCESS;
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}
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} else if ( op->o_bd->be_compare ) {
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rs->sr_err = op->o_bd->be_compare( op, rs );
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#endif /* ! SLAP_COMPARE_IN_FRONTEND */
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} else {
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rs->sr_err = SLAP_CB_CONTINUE;
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}
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if ( rs->sr_err == SLAP_CB_CONTINUE ) {
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/* do our best to compare that AVA
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*
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* NOTE: this code is used only
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* if SLAP_COMPARE_IN_FRONTEND
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* is #define'd (it's not by default)
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* or if op->o_bd->be_compare is NULL.
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*
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* FIXME: one potential issue is that
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* if SLAP_COMPARE_IN_FRONTEND overlays
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* are not executed for compare. */
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BerVarray vals = NULL;
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int rc = LDAP_OTHER;
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rs->sr_err = backend_attribute( op, NULL, &op->o_req_ndn,
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ava->aa_desc, &vals, ACL_COMPARE );
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switch ( rs->sr_err ) {
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default:
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/* return error only if "disclose"
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* is granted on the object */
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if ( backend_access( op, NULL, &op->o_req_ndn,
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slap_schema.si_ad_entry,
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NULL, ACL_DISCLOSE, NULL )
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== LDAP_INSUFFICIENT_ACCESS )
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{
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rs->sr_err = LDAP_NO_SUCH_OBJECT;
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}
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break;
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case LDAP_SUCCESS:
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if ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
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SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
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SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
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vals, &ava->aa_value, op->o_tmpmemctx ) == 0 )
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{
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rs->sr_err = LDAP_COMPARE_TRUE;
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break;
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} else {
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rs->sr_err = LDAP_COMPARE_FALSE;
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}
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rc = LDAP_SUCCESS;
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break;
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}
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send_ldap_result( op, rs );
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if ( rc == 0 ) {
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rs->sr_err = LDAP_SUCCESS;
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}
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if ( vals ) {
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ber_bvarray_free_x( vals, op->o_tmpmemctx );
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}
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}
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cleanup:;
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op->o_bd = bd;
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return rs->sr_err;
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}
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int slap_compare_entry(
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Operation *op,
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Entry *e,
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AttributeAssertion *ava )
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{
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int rc = LDAP_COMPARE_FALSE;
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Attribute *a;
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if ( ! access_allowed( op, e,
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ava->aa_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
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{
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rc = LDAP_INSUFFICIENT_ACCESS;
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goto done;
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}
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if ( get_assert( op ) &&
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( test_filter( op, e, get_assertion( op )) != LDAP_COMPARE_TRUE ))
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{
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rc = LDAP_ASSERTION_FAILED;
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goto done;
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}
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a = attrs_find( e->e_attrs, ava->aa_desc );
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if( a == NULL ) {
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rc = LDAP_NO_SUCH_ATTRIBUTE;
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goto done;
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}
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for(;
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a != NULL;
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a = attrs_find( a->a_next, ava->aa_desc ))
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{
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if (( ava->aa_desc != a->a_desc ) && ! access_allowed( op,
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e, a->a_desc, &ava->aa_value, ACL_COMPARE, NULL ) )
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{
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rc = LDAP_INSUFFICIENT_ACCESS;
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break;
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}
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if ( attr_valfind( a,
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SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
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SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
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&ava->aa_value, NULL, op->o_tmpmemctx ) == 0 )
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{
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rc = LDAP_COMPARE_TRUE;
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break;
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}
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}
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done:
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if( rc != LDAP_COMPARE_TRUE && rc != LDAP_COMPARE_FALSE ) {
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if ( ! access_allowed( op, e,
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slap_schema.si_ad_entry, NULL, ACL_DISCLOSE, NULL ) )
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{
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rc = LDAP_NO_SUCH_OBJECT;
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}
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}
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return rc;
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}
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