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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/stdlib.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include "ldap-int.h"
char *
ldap_first_attribute( LDAP *ld, LDAPMessage *entry, BerElement **berout )
{
int rc;
ber_tag_t tag;
ber_len_t len = 0;
char *attr;
BerElement *ber;
Debug0( LDAP_DEBUG_TRACE, "ldap_first_attribute\n" );
assert( ld != NULL );
assert( LDAP_VALID( ld ) );
assert( entry != NULL );
assert( berout != NULL );
*berout = NULL;
ber = ldap_alloc_ber_with_options( ld );
if( ber == NULL ) {
return NULL;
}
*ber = *entry->lm_ber;
/*
* Skip past the sequence, dn, sequence of sequence leaving
* us at the first attribute.
*/
tag = ber_scanf( ber, "{xl{" /*}}*/, &len );
if( tag == LBER_ERROR ) {
ld->ld_errno = LDAP_DECODING_ERROR;
ber_free( ber, 0 );
return NULL;
}
/* set the length to avoid overrun */
rc = ber_set_option( ber, LBER_OPT_REMAINING_BYTES, &len );
if( rc != LBER_OPT_SUCCESS ) {
ld->ld_errno = LDAP_LOCAL_ERROR;
ber_free( ber, 0 );
return NULL;
}
if ( ber_pvt_ber_remaining( ber ) == 0 ) {
assert( len == 0 );
ber_free( ber, 0 );
return NULL;
}
assert( len != 0 );
/* snatch the first attribute */
tag = ber_scanf( ber, "{ax}", &attr );
if( tag == LBER_ERROR ) {
ld->ld_errno = LDAP_DECODING_ERROR;
ber_free( ber, 0 );
return NULL;
}
*berout = ber;
return attr;
}
/* ARGSUSED */
char *
ldap_next_attribute( LDAP *ld, LDAPMessage *entry, BerElement *ber )
{
ber_tag_t tag;
char *attr;
Debug0( LDAP_DEBUG_TRACE, "ldap_next_attribute\n" );
assert( ld != NULL );
assert( LDAP_VALID( ld ) );
assert( entry != NULL );
assert( ber != NULL );
if ( ber_pvt_ber_remaining( ber ) == 0 ) {
return NULL;
}
/* skip sequence, snarf attribute type, skip values */
tag = ber_scanf( ber, "{ax}", &attr );
if( tag == LBER_ERROR ) {
ld->ld_errno = LDAP_DECODING_ERROR;
return NULL;
}
return attr;
}
/* Fetch attribute type and optionally fetch values. The type
* and values are referenced in-place from the BerElement, they are
* not dup'd into malloc'd memory.
*/
/* ARGSUSED */
int
ldap_get_attribute_ber( LDAP *ld, LDAPMessage *entry, BerElement *ber,
BerValue *attr, BerVarray *vals )
{
ber_tag_t tag;
int rc = LDAP_SUCCESS;
Debug0( LDAP_DEBUG_TRACE, "ldap_get_attribute_ber\n" );
assert( ld != NULL );
assert( LDAP_VALID( ld ) );
assert( entry != NULL );
assert( ber != NULL );
assert( attr != NULL );
attr->bv_val = NULL;
attr->bv_len = 0;
if ( ber_pvt_ber_remaining( ber ) ) {
ber_len_t siz = sizeof( BerValue );
/* skip sequence, snarf attribute type */
tag = ber_scanf( ber, vals ? "{mM}" : "{mx}", attr, vals,
&siz, (ber_len_t)0 );
if( tag == LBER_ERROR ) {
rc = ld->ld_errno = LDAP_DECODING_ERROR;
}
}
return rc;
}
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