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/*
* Copyright (C) 2012 Reto Buerki
* Copyright (C) 2012 Adrian-Ken Rueegsegger
* 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 <tkm/client.h>
#include <tkm/constants.h>
#include "tkm.h"
#include "tkm_nonceg.h"
typedef struct private_tkm_nonceg_t private_tkm_nonceg_t;
/**
* Private data of a tkm_nonceg_t object.
*/
struct private_tkm_nonceg_t {
/**
* Public tkm_nonceg_t interface.
*/
tkm_nonceg_t public;
/**
* Nonce chunk.
*/
chunk_t nonce;
};
METHOD(nonce_gen_t, get_nonce, bool,
private_tkm_nonceg_t *this, size_t size, uint8_t *buffer)
{
nonce_type nonce;
uint64_t nc_id;
nc_id = tkm->idmgr->acquire_id(tkm->idmgr, TKM_CTX_NONCE);
if (!nc_id)
{
return FALSE;
}
if (ike_nc_create(nc_id, size, &nonce) != TKM_OK)
{
tkm->idmgr->release_id(tkm->idmgr, TKM_CTX_NONCE, nc_id);
return FALSE;
}
memcpy(buffer, &nonce.data, size);
this->nonce = chunk_clone(chunk_create(buffer, size));
tkm->chunk_map->insert(tkm->chunk_map, &this->nonce, nc_id);
return TRUE;
}
METHOD(nonce_gen_t, allocate_nonce, bool,
private_tkm_nonceg_t *this, size_t size, chunk_t *chunk)
{
*chunk = chunk_alloc(size);
return get_nonce(this, chunk->len, chunk->ptr);
}
METHOD(nonce_gen_t, destroy, void,
private_tkm_nonceg_t *this)
{
uint64_t nc_id;
nc_id = tkm->chunk_map->get_id(tkm->chunk_map, &this->nonce);
if (nc_id)
{
DBG1(DBG_IKE, "resetting stale nonce context %llu", nc_id);
if (ike_nc_reset(nc_id) != TKM_OK)
{
DBG1(DBG_IKE, "failed to reset nonce context %llu", nc_id);
}
tkm->idmgr->release_id(tkm->idmgr, TKM_CTX_NONCE, nc_id);
tkm->chunk_map->remove(tkm->chunk_map, &this->nonce);
}
chunk_free(&this->nonce);
free(this);
}
/*
* Described in header.
*/
tkm_nonceg_t *tkm_nonceg_create()
{
private_tkm_nonceg_t *this;
INIT(this,
.public = {
.nonce_gen = {
.get_nonce = _get_nonce,
.allocate_nonce = _allocate_nonce,
.destroy = _destroy,
},
},
);
return &this->public;
}
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