187 lines
4.3 KiB
C
187 lines
4.3 KiB
C
/*
|
|
* Copyright (C) 2009 Martin Willi
|
|
* HSR 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_pseudonym_provider.h"
|
|
|
|
#include <utils/debug.h>
|
|
#include <collections/hashtable.h>
|
|
|
|
typedef struct private_eap_simaka_pseudonym_provider_t private_eap_simaka_pseudonym_provider_t;
|
|
|
|
/**
|
|
* Private data of an eap_simaka_pseudonym_provider_t object.
|
|
*/
|
|
struct private_eap_simaka_pseudonym_provider_t {
|
|
|
|
/**
|
|
* Public eap_simaka_pseudonym_provider_t interface.
|
|
*/
|
|
eap_simaka_pseudonym_provider_t public;
|
|
|
|
/**
|
|
* Permanent -> pseudonym mappings
|
|
*/
|
|
hashtable_t *pseudonym;
|
|
|
|
/**
|
|
* Reverse pseudonym -> permanent mappings
|
|
*/
|
|
hashtable_t *permanent;
|
|
|
|
/**
|
|
* RNG for pseudonyms/reauth identities
|
|
*/
|
|
rng_t *rng;
|
|
};
|
|
|
|
/**
|
|
* 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_provider_t, is_pseudonym, identification_t*,
|
|
private_eap_simaka_pseudonym_provider_t *this, identification_t *id)
|
|
{
|
|
identification_t *permanent;
|
|
|
|
permanent = this->permanent->get(this->permanent, id);
|
|
if (permanent)
|
|
{
|
|
return permanent->clone(permanent);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Generate a random identity
|
|
*/
|
|
static identification_t *gen_identity(
|
|
private_eap_simaka_pseudonym_provider_t *this)
|
|
{
|
|
char buf[8], hex[sizeof(buf) * 2 + 1];
|
|
|
|
if (!this->rng->get_bytes(this->rng, sizeof(buf), buf))
|
|
{
|
|
return NULL;
|
|
}
|
|
chunk_to_hex(chunk_create(buf, sizeof(buf)), hex, FALSE);
|
|
|
|
return identification_create_from_string(hex);
|
|
}
|
|
|
|
METHOD(simaka_provider_t, gen_pseudonym, identification_t*,
|
|
private_eap_simaka_pseudonym_provider_t *this, identification_t *id)
|
|
{
|
|
identification_t *pseudonym, *permanent;
|
|
|
|
/* remove old entry */
|
|
pseudonym = this->pseudonym->remove(this->pseudonym, id);
|
|
if (pseudonym)
|
|
{
|
|
permanent = this->permanent->remove(this->permanent, pseudonym);
|
|
if (permanent)
|
|
{
|
|
permanent->destroy(permanent);
|
|
}
|
|
pseudonym->destroy(pseudonym);
|
|
}
|
|
|
|
pseudonym = gen_identity(this);
|
|
if (!pseudonym)
|
|
{
|
|
DBG1(DBG_CFG, "failed to generate pseudonym");
|
|
return NULL;
|
|
}
|
|
|
|
/* create new entries */
|
|
id = id->clone(id);
|
|
this->pseudonym->put(this->pseudonym, id, pseudonym);
|
|
this->permanent->put(this->permanent, pseudonym, id);
|
|
|
|
return pseudonym->clone(pseudonym);
|
|
}
|
|
|
|
METHOD(eap_simaka_pseudonym_provider_t, destroy, void,
|
|
private_eap_simaka_pseudonym_provider_t *this)
|
|
{
|
|
enumerator_t *enumerator;
|
|
identification_t *id;
|
|
void *key;
|
|
|
|
enumerator = this->pseudonym->create_enumerator(this->pseudonym);
|
|
while (enumerator->enumerate(enumerator, &key, &id))
|
|
{
|
|
id->destroy(id);
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
|
|
enumerator = this->permanent->create_enumerator(this->permanent);
|
|
while (enumerator->enumerate(enumerator, &key, &id))
|
|
{
|
|
id->destroy(id);
|
|
}
|
|
enumerator->destroy(enumerator);
|
|
|
|
this->pseudonym->destroy(this->pseudonym);
|
|
this->permanent->destroy(this->permanent);
|
|
this->rng->destroy(this->rng);
|
|
free(this);
|
|
}
|
|
|
|
/**
|
|
* See header
|
|
*/
|
|
eap_simaka_pseudonym_provider_t *eap_simaka_pseudonym_provider_create()
|
|
{
|
|
private_eap_simaka_pseudonym_provider_t *this;
|
|
|
|
INIT(this,
|
|
.public = {
|
|
.provider = {
|
|
.get_triplet = (void*)return_false,
|
|
.get_quintuplet = (void*)return_false,
|
|
.resync = (void*)return_false,
|
|
.is_pseudonym = _is_pseudonym,
|
|
.gen_pseudonym = _gen_pseudonym,
|
|
.is_reauth = (void*)return_null,
|
|
.gen_reauth = (void*)return_null,
|
|
},
|
|
.destroy = _destroy,
|
|
},
|
|
.rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK),
|
|
);
|
|
if (!this->rng)
|
|
{
|
|
free(this);
|
|
return NULL;
|
|
}
|
|
this->pseudonym = hashtable_create((void*)hash, (void*)equals, 0);
|
|
this->permanent = hashtable_create((void*)hash, (void*)equals, 0);
|
|
|
|
return &this->public;
|
|
}
|
|
|