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158 lines
3.3 KiB
C
158 lines
3.3 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 1998-2022 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) 1990 Regents of the University of Michigan.
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* All rights reserved.
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*/
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#include "portable.h"
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#include <stdio.h>
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#include <ac/stdlib.h>
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#include <ac/socket.h>
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#include <ac/string.h>
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#include <ac/time.h>
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#include "ldap-int.h"
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char *
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ldap_first_attribute( LDAP *ld, LDAPMessage *entry, BerElement **berout )
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{
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int rc;
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ber_tag_t tag;
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ber_len_t len = 0;
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char *attr;
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BerElement *ber;
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Debug0( LDAP_DEBUG_TRACE, "ldap_first_attribute\n" );
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assert( ld != NULL );
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assert( LDAP_VALID( ld ) );
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assert( entry != NULL );
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assert( berout != NULL );
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*berout = NULL;
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ber = ldap_alloc_ber_with_options( ld );
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if( ber == NULL ) {
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return NULL;
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}
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*ber = *entry->lm_ber;
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/*
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* Skip past the sequence, dn, sequence of sequence leaving
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* us at the first attribute.
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*/
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tag = ber_scanf( ber, "{xl{" /*}}*/, &len );
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if( tag == LBER_ERROR ) {
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ld->ld_errno = LDAP_DECODING_ERROR;
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ber_free( ber, 0 );
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return NULL;
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}
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/* set the length to avoid overrun */
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rc = ber_set_option( ber, LBER_OPT_REMAINING_BYTES, &len );
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if( rc != LBER_OPT_SUCCESS ) {
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ld->ld_errno = LDAP_LOCAL_ERROR;
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ber_free( ber, 0 );
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return NULL;
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}
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if ( ber_pvt_ber_remaining( ber ) == 0 ) {
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assert( len == 0 );
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ber_free( ber, 0 );
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return NULL;
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}
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assert( len != 0 );
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/* snatch the first attribute */
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tag = ber_scanf( ber, "{ax}", &attr );
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if( tag == LBER_ERROR ) {
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ld->ld_errno = LDAP_DECODING_ERROR;
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ber_free( ber, 0 );
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return NULL;
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}
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*berout = ber;
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return attr;
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}
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/* ARGSUSED */
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char *
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ldap_next_attribute( LDAP *ld, LDAPMessage *entry, BerElement *ber )
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{
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ber_tag_t tag;
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char *attr;
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Debug0( LDAP_DEBUG_TRACE, "ldap_next_attribute\n" );
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assert( ld != NULL );
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assert( LDAP_VALID( ld ) );
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assert( entry != NULL );
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assert( ber != NULL );
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if ( ber_pvt_ber_remaining( ber ) == 0 ) {
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return NULL;
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}
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/* skip sequence, snarf attribute type, skip values */
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tag = ber_scanf( ber, "{ax}", &attr );
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if( tag == LBER_ERROR ) {
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ld->ld_errno = LDAP_DECODING_ERROR;
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return NULL;
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}
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return attr;
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}
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/* Fetch attribute type and optionally fetch values. The type
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* and values are referenced in-place from the BerElement, they are
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* not dup'd into malloc'd memory.
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*/
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/* ARGSUSED */
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int
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ldap_get_attribute_ber( LDAP *ld, LDAPMessage *entry, BerElement *ber,
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BerValue *attr, BerVarray *vals )
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{
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ber_tag_t tag;
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int rc = LDAP_SUCCESS;
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Debug0( LDAP_DEBUG_TRACE, "ldap_get_attribute_ber\n" );
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assert( ld != NULL );
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assert( LDAP_VALID( ld ) );
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assert( entry != NULL );
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assert( ber != NULL );
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assert( attr != NULL );
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attr->bv_val = NULL;
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attr->bv_len = 0;
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if ( ber_pvt_ber_remaining( ber ) ) {
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ber_len_t siz = sizeof( BerValue );
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/* skip sequence, snarf attribute type */
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tag = ber_scanf( ber, vals ? "{mM}" : "{mx}", attr, vals,
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&siz, (ber_len_t)0 );
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if( tag == LBER_ERROR ) {
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rc = ld->ld_errno = LDAP_DECODING_ERROR;
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}
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}
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return rc;
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}
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