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/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 1998-2021 The OpenLDAP Foundation.
* Portions Copyright 2008 Pierangelo Masarati.
* 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>.
*/
/* ACKNOWLEDGEMENTS:
* This work was initially developed by Pierangelo Masarati
* for inclusion in OpenLDAP Software.
*/
#include "portable.h"
#include <stdio.h>
#include <ac/stdlib.h>
#include <ac/string.h>
#include <ac/time.h>
#include "ldap-int.h"
int
ldap_create_deref_control_value(
LDAP *ld,
LDAPDerefSpec *ds,
struct berval *value )
{
BerElement *ber = NULL;
ber_tag_t tag;
int i;
if ( ld == NULL || value == NULL || ds == NULL )
{
if ( ld )
ld->ld_errno = LDAP_PARAM_ERROR;
return LDAP_PARAM_ERROR;
}
assert( LDAP_VALID( ld ) );
value->bv_val = NULL;
value->bv_len = 0;
ld->ld_errno = LDAP_SUCCESS;
ber = ldap_alloc_ber_with_options( ld );
if ( ber == NULL ) {
ld->ld_errno = LDAP_NO_MEMORY;
return ld->ld_errno;
}
tag = ber_printf( ber, "{" /*}*/ );
if ( tag == LBER_ERROR ) {
ld->ld_errno = LDAP_ENCODING_ERROR;
goto done;
}
for ( i = 0; ds[i].derefAttr != NULL; i++ ) {
int j;
tag = ber_printf( ber, "{s{" /*}}*/ , ds[i].derefAttr );
if ( tag == LBER_ERROR ) {
ld->ld_errno = LDAP_ENCODING_ERROR;
goto done;
}
for ( j = 0; ds[i].attributes[j] != NULL; j++ ) {
tag = ber_printf( ber, "s", ds[i].attributes[ j ] );
if ( tag == LBER_ERROR ) {
ld->ld_errno = LDAP_ENCODING_ERROR;
goto done;
}
}
tag = ber_printf( ber, /*{{*/ "}N}" );
if ( tag == LBER_ERROR ) {
ld->ld_errno = LDAP_ENCODING_ERROR;
goto done;
}
}
tag = ber_printf( ber, /*{*/ "}" );
if ( tag == LBER_ERROR ) {
ld->ld_errno = LDAP_ENCODING_ERROR;
goto done;
}
if ( ber_flatten2( ber, value, 1 ) == -1 ) {
ld->ld_errno = LDAP_NO_MEMORY;
}
done:;
if ( ber != NULL ) {
ber_free( ber, 1 );
}
return ld->ld_errno;
}
int
ldap_create_deref_control(
LDAP *ld,
LDAPDerefSpec *ds,
int iscritical,
LDAPControl **ctrlp )
{
struct berval value;
if ( ctrlp == NULL ) {
ld->ld_errno = LDAP_PARAM_ERROR;
return ld->ld_errno;
}
ld->ld_errno = ldap_create_deref_control_value( ld, ds, &value );
if ( ld->ld_errno == LDAP_SUCCESS ) {
ld->ld_errno = ldap_control_create( LDAP_CONTROL_X_DEREF,
iscritical, &value, 0, ctrlp );
if ( ld->ld_errno != LDAP_SUCCESS ) {
LDAP_FREE( value.bv_val );
}
}
return ld->ld_errno;
}
void
ldap_derefresponse_free( LDAPDerefRes *dr )
{
for ( ; dr; ) {
LDAPDerefRes *drnext = dr->next;
LDAPDerefVal *dv;
LDAP_FREE( dr->derefAttr );
LDAP_FREE( dr->derefVal.bv_val );
for ( dv = dr->attrVals; dv; ) {
LDAPDerefVal *dvnext = dv->next;
LDAP_FREE( dv->type );
ber_bvarray_free( dv->vals );
LDAP_FREE( dv );
dv = dvnext;
}
LDAP_FREE( dr );
dr = drnext;
}
}
int
ldap_parse_derefresponse_control(
LDAP *ld,
LDAPControl *ctrl,
LDAPDerefRes **drp2 )
{
BerElement *ber;
ber_tag_t tag;
ber_len_t len;
char *last;
LDAPDerefRes *drhead = NULL, **drp;
if ( ld == NULL || ctrl == NULL || drp2 == NULL ) {
if ( ld )
ld->ld_errno = LDAP_PARAM_ERROR;
return LDAP_PARAM_ERROR;
}
/* Create a BerElement from the berval returned in the control. */
ber = ber_init( &ctrl->ldctl_value );
if ( ber == NULL ) {
ld->ld_errno = LDAP_NO_MEMORY;
return ld->ld_errno;
}
/* Extract the count and cookie from the control. */
drp = &drhead;
for ( tag = ber_first_element( ber, &len, &last );
tag != LBER_DEFAULT;
tag = ber_next_element( ber, &len, last ) )
{
LDAPDerefRes *dr;
LDAPDerefVal **dvp;
char *last2;
dr = LDAP_CALLOC( 1, sizeof(LDAPDerefRes) );
dvp = &dr->attrVals;
tag = ber_scanf( ber, "{ao", &dr->derefAttr, &dr->derefVal );
if ( tag == LBER_ERROR ) {
goto done;
}
tag = ber_peek_tag( ber, &len );
if ( tag == (LBER_CONSTRUCTED|LBER_CLASS_CONTEXT) ) {
for ( tag = ber_first_element( ber, &len, &last2 );
tag != LBER_DEFAULT;
tag = ber_next_element( ber, &len, last2 ) )
{
LDAPDerefVal *dv;
dv = LDAP_CALLOC( 1, sizeof(LDAPDerefVal) );
tag = ber_scanf( ber, "{a[W]}", &dv->type, &dv->vals );
if ( tag == LBER_ERROR ) {
goto done;
}
*dvp = dv;
dvp = &dv->next;
}
}
tag = ber_scanf( ber, "}" );
if ( tag == LBER_ERROR ) {
goto done;
}
*drp = dr;
drp = &dr->next;
}
tag = 0;
done:;
ber_free( ber, 1 );
if ( tag == LBER_ERROR ) {
if ( drhead != NULL ) {
ldap_derefresponse_free( drhead );
}
*drp2 = NULL;
ld->ld_errno = LDAP_DECODING_ERROR;
} else {
*drp2 = drhead;
ld->ld_errno = LDAP_SUCCESS;
}
return ld->ld_errno;
}
int
ldap_parse_deref_control(
LDAP *ld,
LDAPControl **ctrls,
LDAPDerefRes **drp )
{
LDAPControl *c;
if ( drp == NULL ) {
ld->ld_errno = LDAP_PARAM_ERROR;
return ld->ld_errno;
}
*drp = NULL;
if ( ctrls == NULL ) {
ld->ld_errno = LDAP_CONTROL_NOT_FOUND;
return ld->ld_errno;
}
c = ldap_control_find( LDAP_CONTROL_X_DEREF, ctrls, NULL );
if ( c == NULL ) {
/* No deref control was found. */
ld->ld_errno = LDAP_CONTROL_NOT_FOUND;
return ld->ld_errno;
}
ld->ld_errno = ldap_parse_derefresponse_control( ld, c, drp );
return ld->ld_errno;
}
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