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/**
* @file child_sa.c
*
* @brief Implementation of child_sa_t.
*
*/
/*
* Copyright (C) 2005 Jan Hutter, 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 "child_sa.h"
#include <utils/allocator.h>
#include <daemon.h>
typedef struct private_child_sa_t private_child_sa_t;
/**
* Private data of a child_sa_t object.
*/
struct private_child_sa_t {
/**
* Public interface of child_sa_t.
*/
child_sa_t public;
/**
* CHILD_SAs own logger
*/
logger_t *logger;
/**
* Protocols used in this SA
*/
protocol_id_t protocols[2];
};
/**
* Implementation of child_sa_t.get_spi.
*/
static u_int32_t get_spi(private_child_sa_t *this)
{
return 0;
}
/**
* Implementation of child_sa_t.destroy.
*/
static void destroy(private_child_sa_t *this)
{
charon->logger_manager->destroy_logger(charon->logger_manager, this->logger);
allocator_free(this);
}
/*
* Described in header.
*/
child_sa_t * child_sa_create(child_proposal_t *proposal, prf_plus_t *prf_plus)
{
private_child_sa_t *this = allocator_alloc_thing(private_child_sa_t);
u_int i;
/* public functions */
this->public.get_spi = (u_int32_t(*)(child_sa_t*))get_spi;
this->public.destroy = (void(*)(child_sa_t*))destroy;
/* private data */
this->logger = charon->logger_manager->create_logger(charon->logger_manager, CHILD_SA, NULL);
proposal->get_protocols(proposal, this->protocols);
/* derive keys */
for (i = 0; i<2; i++)
{
if (this->protocols[i] != UNDEFINED_PROTOCOL_ID)
{
algorithm_t *algo;
chunk_t key;
/* get encryption key */
if (proposal->get_algorithm(proposal, this->protocols[i], ENCRYPTION_ALGORITHM, &algo))
{
this->logger->log(this->logger, CONTROL|LEVEL1, "%s: using %s %s, ",
mapping_find(protocol_id_m, this->protocols[i]),
mapping_find(transform_type_m, ENCRYPTION_ALGORITHM),
mapping_find(encryption_algorithm_m, algo->algorithm));
prf_plus->allocate_bytes(prf_plus, algo->key_size, &key);
this->logger->log_chunk(this->logger, PRIVATE, "key:", &key);
allocator_free_chunk(&key);
}
/* get integrity key */
if (proposal->get_algorithm(proposal, this->protocols[i], INTEGRITY_ALGORITHM, &algo))
{
this->logger->log(this->logger, CONTROL|LEVEL1, "%s: using %s %s,",
mapping_find(protocol_id_m, this->protocols[i]),
mapping_find(transform_type_m, INTEGRITY_ALGORITHM),
mapping_find(integrity_algorithm_m, algo->algorithm));
prf_plus->allocate_bytes(prf_plus, algo->key_size, &key);
this->logger->log_chunk(this->logger, PRIVATE, "key:", &key);
allocator_free_chunk(&key);
}
}
}
return (&this->public);
}
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