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/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2022 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
* <http://www.OpenLDAP.org/license.html>.
*/
/* Portions Copyright (c) 1990 Regents of the University of Michigan.
* All rights reserved.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include "ldap-int.h"
#include "ldap_log.h"
/* The compare request looks like this:
* CompareRequest ::= SEQUENCE {
* entry DistinguishedName,
* ava SEQUENCE {
* type AttributeType,
* value AttributeValue
* }
* }
*/
BerElement *
ldap_build_compare_req(
LDAP *ld,
LDAP_CONST char *dn,
LDAP_CONST char *attr,
struct berval *bvalue,
LDAPControl **sctrls,
LDAPControl **cctrls,
int *msgidp )
{
BerElement *ber;
int rc;
/* create a message to send */
if ( (ber = ldap_alloc_ber_with_options( ld )) == NULL ) {
return( NULL );
}
LDAP_NEXT_MSGID(ld, *msgidp);
rc = ber_printf( ber, "{it{s{sON}N}", /* '}' */
*msgidp,
LDAP_REQ_COMPARE, dn, attr, bvalue );
if ( rc == -1 )
{
ld->ld_errno = LDAP_ENCODING_ERROR;
ber_free( ber, 1 );
return( NULL );
}
/* Put Server Controls */
if( ldap_int_put_controls( ld, sctrls, ber ) != LDAP_SUCCESS ) {
ber_free( ber, 1 );
return( NULL );
}
if( ber_printf( ber, /*{*/ "N}" ) == -1 ) {
ld->ld_errno = LDAP_ENCODING_ERROR;
ber_free( ber, 1 );
return( NULL );
}
return( ber );
}
/*
* ldap_compare_ext - perform an ldap extended compare operation. The dn
* of the entry to compare to and the attribute and value to compare (in
* attr and value) are supplied. The msgid of the response is returned.
*
* Example:
* struct berval bvalue = { "secret", sizeof("secret")-1 };
* rc = ldap_compare( ld, "c=us@cn=bob",
* "userPassword", &bvalue,
* sctrl, cctrl, &msgid )
*/
int
ldap_compare_ext(
LDAP *ld,
LDAP_CONST char *dn,
LDAP_CONST char *attr,
struct berval *bvalue,
LDAPControl **sctrls,
LDAPControl **cctrls,
int *msgidp )
{
int rc;
BerElement *ber;
ber_int_t id;
Debug0( LDAP_DEBUG_TRACE, "ldap_compare\n" );
assert( ld != NULL );
assert( LDAP_VALID( ld ) );
assert( dn != NULL );
assert( attr != NULL );
assert( msgidp != NULL );
/* check client controls */
rc = ldap_int_client_controls( ld, cctrls );
if( rc != LDAP_SUCCESS ) return rc;
ber = ldap_build_compare_req(
ld, dn, attr, bvalue, sctrls, cctrls, &id );
if( !ber )
return ld->ld_errno;
/* send the message */
*msgidp = ldap_send_initial_request( ld, LDAP_REQ_COMPARE, dn, ber, id );
return ( *msgidp < 0 ? ld->ld_errno : LDAP_SUCCESS );
}
/*
* ldap_compare_ext - perform an ldap extended compare operation. The dn
* of the entry to compare to and the attribute and value to compare (in
* attr and value) are supplied. The msgid of the response is returned.
*
* Example:
* msgid = ldap_compare( ld, "c=us@cn=bob", "userPassword", "secret" )
*/
int
ldap_compare(
LDAP *ld,
LDAP_CONST char *dn,
LDAP_CONST char *attr,
LDAP_CONST char *value )
{
int msgid;
struct berval bvalue;
assert( value != NULL );
bvalue.bv_val = (char *) value;
bvalue.bv_len = (value == NULL) ? 0 : strlen( value );
return ldap_compare_ext( ld, dn, attr, &bvalue, NULL, NULL, &msgid ) == LDAP_SUCCESS
? msgid : -1;
}
int
ldap_compare_ext_s(
LDAP *ld,
LDAP_CONST char *dn,
LDAP_CONST char *attr,
struct berval *bvalue,
LDAPControl **sctrl,
LDAPControl **cctrl )
{
int rc;
int msgid;
LDAPMessage *res;
rc = ldap_compare_ext( ld, dn, attr, bvalue, sctrl, cctrl, &msgid );
if ( rc != LDAP_SUCCESS )
return( rc );
if ( ldap_result( ld, msgid, LDAP_MSG_ALL, (struct timeval *) NULL, &res ) == -1 || !res )
return( ld->ld_errno );
return( ldap_result2error( ld, res, 1 ) );
}
int
ldap_compare_s(
LDAP *ld,
LDAP_CONST char *dn,
LDAP_CONST char *attr,
LDAP_CONST char *value )
{
struct berval bvalue;
assert( value != NULL );
bvalue.bv_val = (char *) value;
bvalue.bv_len = (value == NULL) ? 0 : strlen( value );
return ldap_compare_ext_s( ld, dn, attr, &bvalue, NULL, NULL );
}
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