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/*
* Copyright (C) 2008 Thomas Kallenberg
* Copyright (C) 2008 Martin Willi
* Copyright (C) 2008 Tobias Brunner
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* $Id$
*/
#include "uci_creds.h"
#include <daemon.h>
#include <credentials/keys/shared_key.h>
#include <utils/identification.h>
typedef struct private_uci_creds_t private_uci_creds_t;
/**
* Private data of an uci_creds_t object
*/
struct private_uci_creds_t {
/**
* Public part
*/
uci_creds_t public;
/**
* UCI parser context
*/
uci_parser_t *parser;
};
typedef struct {
/** implements enumerator */
enumerator_t public;
/** inneer UCI enumerator */
enumerator_t *inner;
/** currently enumerated shared shared */
shared_key_t *current;
/** local ID to match */
identification_t *me;
/** remote ID to match */
identification_t *other;
} shared_enumerator_t;
/**
* Implementation of shared_enumerator_t.public.enumerate
*/
static bool shared_enumerator_enumerate(shared_enumerator_t *this,
shared_key_t **key, id_match_t *me, id_match_t *other)
{
char *local_id, *remote_id, *psk;
identification_t *local, *remote;
while (TRUE)
{
/* defaults */
local_id = "%any";
remote_id = "%any";
psk = NULL;
if (!this->inner->enumerate(this->inner, NULL,
&local_id, &remote_id, &psk))
{
return FALSE;
}
if (psk == NULL)
{
continue;
}
if (me)
{
local = identification_create_from_string(local_id);
if (!local)
{
continue;
}
*me = this->me ? this->me->matches(this->me, local)
: ID_MATCH_ANY;
local->destroy(local);
if (!*me)
{
continue;
}
}
if (other)
{
remote = identification_create_from_string(remote_id);
if (!remote)
{
continue;
}
*other = this->other ? this->other->matches(this->other, remote)
: ID_MATCH_ANY;
remote->destroy(remote);
if (!*other)
{
continue;
}
}
break;
}
DESTROY_IF(this->current);
this->current = shared_key_create(SHARED_IKE,
chunk_clone(chunk_create(psk, strlen(psk))));
*key = this->current;
return TRUE;
}
/**
* Implementation of shared_enumerator_t.public.destroy
*/
static void shared_enumerator_destroy(shared_enumerator_t *this)
{
this->inner->destroy(this->inner);
DESTROY_IF(this->current);
free(this);
}
/**
* Implementation of backend_t.create_shared_cfg_enumerator.
*/
static enumerator_t* create_shared_enumerator(private_uci_creds_t *this,
shared_key_type_t type,
identification_t *me,
identification_t *other)
{
shared_enumerator_t *e;
if (type != SHARED_IKE)
{
return NULL;
}
e = malloc_thing(shared_enumerator_t);
e->current = NULL;
e->public.enumerate = (void*)shared_enumerator_enumerate;
e->public.destroy = (void*)shared_enumerator_destroy;
e->me = me;
e->other = other;
e->inner = this->parser->create_section_enumerator(this->parser,
"local_id", "remote_id", "psk", NULL);
if (!e->inner)
{
free(e);
return NULL;
}
return &e->public;
}
/**
* Implementation of uci_creds_t.destroy
*/
static void destroy(private_uci_creds_t *this)
{
free(this);
}
uci_creds_t *uci_creds_create(uci_parser_t *parser)
{
private_uci_creds_t *this = malloc_thing(private_uci_creds_t);
this->public.credential_set.create_shared_enumerator = (enumerator_t*(*)(credential_set_t*, shared_key_type_t, identification_t*, identification_t*))create_shared_enumerator;
this->public.credential_set.create_private_enumerator = (enumerator_t*(*) (credential_set_t*, key_type_t, identification_t*))return_null;
this->public.credential_set.create_cert_enumerator = (enumerator_t*(*) (credential_set_t*, certificate_type_t, key_type_t,identification_t *, bool))return_null;
this->public.credential_set.create_cdp_enumerator = (enumerator_t*(*) (credential_set_t *,certificate_type_t, identification_t *))return_null;
this->public.credential_set.cache_cert = (void (*)(credential_set_t *, certificate_t *))nop;
this->public.destroy = (void(*) (uci_creds_t*))destroy;
this->parser = parser;
return &this->public;
}
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