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// Copyright (C) 2011-2018 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <config.h>
#include <cryptolink/cryptolink.h>
#include <cryptolink/crypto_hash.h>
#include <cryptolink/crypto_hmac.h>
#include <cryptolink/crypto_rng.h>
#include <botan/botan.h>
#include <botan/init.h>
#include <botan/auto_rng.h>
namespace isc {
namespace cryptolink {
// For Botan, we use the CryptoLink class object in RAII style
class CryptoLinkImpl {
private:
Botan::LibraryInitializer botan_init_;
};
CryptoLink::~CryptoLink() {
rng_.reset();
delete impl_;
}
/// \brief Botan implementation of RNG.
class RNGImpl : public RNG {
public:
RNGImpl() {
rng.reset(new Botan::AutoSeeded_RNG());
}
~RNGImpl() {
}
private:
std::vector<uint8_t> random(size_t len) {
std::vector<uint8_t> data;
if (len > 0) {
data.resize(len);
try {
rng->randomize(&data[0], len);
} catch (const Botan::Exception& ex) {
isc_throw(isc::cryptolink::LibraryError,
"Botan error: " << ex.what());
}
}
return (data);
}
boost::shared_ptr<Botan::RandomNumberGenerator> rng;
};
void
CryptoLink::initialize() {
CryptoLink& c = getCryptoLinkInternal();
if (!c.impl_) {
try {
c.impl_ = new CryptoLinkImpl();
} catch (const Botan::Exception& ex) {
isc_throw(InitializationError, "Botan error: " << ex.what());
}
}
if (!c.rng_) {
try {
c.rng_.reset(new RNGImpl());
} catch (const Botan::Exception& ex) {
isc_throw(InitializationError, "Botan error: " << ex.what());
}
}
}
std::string
CryptoLink::getVersion() {
return (Botan::version_string());
}
} // namespace cryptolink
} // namespace isc
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