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/*
* Copyright (C) 2016 Tobias Brunner
* 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 "mock_nonce_gen.h"
typedef struct private_nonce_gen_t private_nonce_gen_t;
struct private_nonce_gen_t {
/**
* Public interface
*/
nonce_gen_t public;
/**
* Random number generator
*/
rng_t* rng;
/**
* First byte to set to the nonces
*/
u_char first;
};
METHOD(nonce_gen_t, get_nonce, bool,
private_nonce_gen_t *this, size_t size, uint8_t *buffer)
{
if (size > 0)
{
buffer[0] = this->first;
buffer++;
size--;
}
return this->rng->get_bytes(this->rng, size, buffer);
}
METHOD(nonce_gen_t, allocate_nonce, bool,
private_nonce_gen_t *this, size_t size, chunk_t *chunk)
{
*chunk = chunk_alloc(size);
if (!get_nonce(this, chunk->len, chunk->ptr))
{
chunk_free(chunk);
return FALSE;
}
return TRUE;
}
METHOD(nonce_gen_t, destroy, void,
private_nonce_gen_t *this)
{
DESTROY_IF(this->rng);
free(this);
}
/*
* Described in header
*/
nonce_gen_t *mock_nonce_gen_create(u_char first)
{
private_nonce_gen_t *this;
INIT(this,
.public = {
.get_nonce = _get_nonce,
.allocate_nonce = _allocate_nonce,
.destroy = _destroy,
},
.rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK),
.first = first,
);
if (!this->rng)
{
destroy(this);
return NULL;
}
return &this->public;
}
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