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/*
* Copyright (C) 2013 Tobias Brunner
* 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 "iv_gen_rand.h"
#include <library.h>
typedef struct private_iv_gen_t private_iv_gen_t;
/**
* Private data of an iv_gen_t object.
*/
struct private_iv_gen_t {
/**
* Public iv_gen_t interface.
*/
iv_gen_t public;
/**
* rng_t object
*/
rng_t *rng;
};
METHOD(iv_gen_t, get_iv, bool,
private_iv_gen_t *this, uint64_t seq, size_t size, uint8_t *buffer)
{
if (!this->rng)
{
return FALSE;
}
return this->rng->get_bytes(this->rng, size, buffer);
}
METHOD(iv_gen_t, allocate_iv, bool,
private_iv_gen_t *this, uint64_t seq, size_t size, chunk_t *chunk)
{
if (!this->rng)
{
return FALSE;
}
return this->rng->allocate_bytes(this->rng, size, chunk);
}
METHOD(iv_gen_t, destroy, void,
private_iv_gen_t *this)
{
DESTROY_IF(this->rng);
free(this);
}
iv_gen_t *iv_gen_rand_create()
{
private_iv_gen_t *this;
INIT(this,
.public = {
.get_iv = _get_iv,
.allocate_iv = _allocate_iv,
.destroy = _destroy,
},
.rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK),
);
return &this->public;
}
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