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/*
* Copyright (c) 2010 .SE (The Internet Infrastructure Foundation)
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*****************************************************************************
BOTANRNG.cpp
Botan random number generator class
*****************************************************************************/
#include "config.h"
#include "BotanRNG.h"
#include <botan/version.h>
#if BOTAN_VERSION_CODE < BOTAN_VERSION_CODE_FOR(1,11,14)
#include <botan/libstate.h>
#else
#include <botan/auto_rng.h>
#endif
// Base constructor
BotanRNG::BotanRNG()
{
#if BOTAN_VERSION_CODE < BOTAN_VERSION_CODE_FOR(1,11,14)
rng = &Botan::global_state().global_rng();
#else
rng = new Botan::AutoSeeded_RNG();
#endif
}
// Destructor
BotanRNG::~BotanRNG()
{
#if BOTAN_VERSION_CODE >= BOTAN_VERSION_CODE_FOR(1,11,14)
delete rng;
#endif
}
// Generate random data
bool BotanRNG::generateRandom(ByteString& data, const size_t len)
{
data.wipe(len);
if (len > 0)
rng->randomize(&data[0], len);
return true;
}
// Seed the random pool
void BotanRNG::seed(ByteString& seedData)
{
rng->add_entropy(seedData.byte_str(), seedData.size());
// add_entropy will make sure the RNG is reseed so we do not need to call it.
// Made this change bacuase of API changes in Botan 1.11.31,
// but the statement above is also true for Botan 1.10.
// rng->reseed(seedData.size());
}
// Get the RNG
Botan::RandomNumberGenerator* BotanRNG::getRNG()
{
return rng;
}
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