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/*
* Copyright (C) 2009 Martin Willi
* 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.
*/
#include "eap_simaka_reauth_card.h"
#include <daemon.h>
#include <collections/hashtable.h>
typedef struct private_eap_simaka_reauth_card_t private_eap_simaka_reauth_card_t;
/**
* Private data of an eap_simaka_reauth_card_t object.
*/
struct private_eap_simaka_reauth_card_t {
/**
* Public eap_simaka_reauth_card_t interface.
*/
eap_simaka_reauth_card_t public;
/**
* Permanent -> reauth_data_t mappings
*/
hashtable_t *reauth;
};
/**
* Data associated to a reauthentication identity
*/
typedef struct {
/** currently used reauthentication identity */
identification_t *id;
/** associated permanent identity */
identification_t *permanent;
/** counter value */
uint16_t counter;
/** master key */
char mk[HASH_SIZE_SHA1];
} reauth_data_t;
/**
* hashtable hash function
*/
static u_int hash(identification_t *key)
{
return chunk_hash(key->get_encoding(key));
}
/**
* hashtable equals function
*/
static bool equals(identification_t *key1, identification_t *key2)
{
return key1->equals(key1, key2);
}
METHOD(simaka_card_t, get_reauth, identification_t*,
private_eap_simaka_reauth_card_t *this, identification_t *id,
char mk[HASH_SIZE_SHA1], uint16_t *counter)
{
reauth_data_t *data;
identification_t *reauth;
/* look up reauthentication data */
data = this->reauth->remove(this->reauth, id);
if (!data)
{
return NULL;
}
*counter = ++data->counter;
memcpy(mk, data->mk, HASH_SIZE_SHA1);
reauth = data->id;
data->permanent->destroy(data->permanent);
free(data);
return reauth;
}
METHOD(simaka_card_t, set_reauth, void,
private_eap_simaka_reauth_card_t *this, identification_t *id,
identification_t* next, char mk[HASH_SIZE_SHA1], uint16_t counter)
{
reauth_data_t *data;
data = this->reauth->get(this->reauth, id);
if (data)
{
data->id->destroy(data->id);
}
else
{
data = malloc_thing(reauth_data_t);
data->permanent = id->clone(id);
this->reauth->put(this->reauth, data->permanent, data);
}
data->counter = counter;
data->id = next->clone(next);
memcpy(data->mk, mk, HASH_SIZE_SHA1);
}
METHOD(simaka_card_t, get_quintuplet, status_t,
private_eap_simaka_reauth_card_t *this, identification_t *id,
char rand[AKA_RAND_LEN], char autn[AKA_AUTN_LEN], char ck[AKA_CK_LEN],
char ik[AKA_IK_LEN], char res[AKA_RES_MAX], int *res_len)
{
return NOT_SUPPORTED;
}
METHOD(eap_simaka_reauth_card_t, destroy, void,
private_eap_simaka_reauth_card_t *this)
{
enumerator_t *enumerator;
reauth_data_t *data;
void *key;
enumerator = this->reauth->create_enumerator(this->reauth);
while (enumerator->enumerate(enumerator, &key, &data))
{
data->id->destroy(data->id);
data->permanent->destroy(data->permanent);
free(data);
}
enumerator->destroy(enumerator);
this->reauth->destroy(this->reauth);
free(this);
}
/**
* See header
*/
eap_simaka_reauth_card_t *eap_simaka_reauth_card_create()
{
private_eap_simaka_reauth_card_t *this;
INIT(this,
.public = {
.card = {
.get_triplet = (void*)return_null,
.get_quintuplet = _get_quintuplet,
.resync = (void*)return_false,
.get_pseudonym = (void*)return_null,
.set_pseudonym = (void*)nop,
.get_reauth = _get_reauth,
.set_reauth = _set_reauth,
},
.destroy = _destroy,
},
.reauth = hashtable_create((void*)hash, (void*)equals, 0),
);
return &this->public;
}
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