112 lines
2.5 KiB
C
112 lines
2.5 KiB
C
/*
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* Copyright (C) 2012 Reto Buerki
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* Copyright (C) 2012 Adrian-Ken Rueegsegger
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* HSR Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include <tkm/client.h>
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#include <tkm/constants.h>
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#include "tkm.h"
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#include "tkm_nonceg.h"
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typedef struct private_tkm_nonceg_t private_tkm_nonceg_t;
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/**
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* Private data of a tkm_nonceg_t object.
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*/
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struct private_tkm_nonceg_t {
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/**
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* Public tkm_nonceg_t interface.
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*/
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tkm_nonceg_t public;
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/**
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* Nonce chunk.
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*/
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chunk_t nonce;
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};
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METHOD(nonce_gen_t, get_nonce, bool,
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private_tkm_nonceg_t *this, size_t size, uint8_t *buffer)
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{
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nonce_type nonce;
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uint64_t nc_id;
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nc_id = tkm->idmgr->acquire_id(tkm->idmgr, TKM_CTX_NONCE);
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if (!nc_id)
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{
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return FALSE;
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}
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if (ike_nc_create(nc_id, size, &nonce) != TKM_OK)
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{
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tkm->idmgr->release_id(tkm->idmgr, TKM_CTX_NONCE, nc_id);
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return FALSE;
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}
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memcpy(buffer, &nonce.data, size);
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this->nonce = chunk_clone(chunk_create(buffer, size));
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tkm->chunk_map->insert(tkm->chunk_map, &this->nonce, nc_id);
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return TRUE;
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}
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METHOD(nonce_gen_t, allocate_nonce, bool,
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private_tkm_nonceg_t *this, size_t size, chunk_t *chunk)
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{
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*chunk = chunk_alloc(size);
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return get_nonce(this, chunk->len, chunk->ptr);
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}
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METHOD(nonce_gen_t, destroy, void,
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private_tkm_nonceg_t *this)
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{
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uint64_t nc_id;
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nc_id = tkm->chunk_map->get_id(tkm->chunk_map, &this->nonce);
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if (nc_id)
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{
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DBG1(DBG_IKE, "resetting stale nonce context %llu", nc_id);
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if (ike_nc_reset(nc_id) != TKM_OK)
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{
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DBG1(DBG_IKE, "failed to reset nonce context %llu", nc_id);
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}
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tkm->idmgr->release_id(tkm->idmgr, TKM_CTX_NONCE, nc_id);
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tkm->chunk_map->remove(tkm->chunk_map, &this->nonce);
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}
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chunk_free(&this->nonce);
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free(this);
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}
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/*
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* Described in header.
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*/
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tkm_nonceg_t *tkm_nonceg_create()
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{
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private_tkm_nonceg_t *this;
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INIT(this,
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.public = {
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.nonce_gen = {
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.get_nonce = _get_nonce,
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.allocate_nonce = _allocate_nonce,
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.destroy = _destroy,
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},
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},
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);
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return &this->public;
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}
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