You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
89 lines
2.1 KiB
89 lines
2.1 KiB
/*
|
|
This file is part of cpp-ethereum.
|
|
|
|
cpp-ethereum 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 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
cpp-ethereum 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.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
/** @file AES.h
|
|
* @author Alex Leverington <nessence@gmail.com>
|
|
* @date 2014
|
|
*
|
|
* AES
|
|
* todo: use openssl
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#include <atomic>
|
|
#include "Common.h"
|
|
|
|
namespace dev
|
|
{
|
|
namespace crypto
|
|
{
|
|
namespace aes
|
|
{
|
|
|
|
struct Aes128Ctr;
|
|
enum StreamType { Encrypt, Decrypt };
|
|
|
|
/**
|
|
* @brief Encrypted stream
|
|
*/
|
|
class Stream
|
|
{
|
|
public:
|
|
// streamtype maybe irrelevant w/ctr
|
|
Stream(StreamType _t, h128 _ckey);
|
|
~Stream();
|
|
|
|
virtual void update(bytesRef io_bytes);
|
|
|
|
/// Move ciphertext to _bytes.
|
|
virtual size_t streamOut(bytes& o_bytes);
|
|
|
|
private:
|
|
Stream(Stream const&) = delete;
|
|
Stream& operator=(Stream const&) = delete;
|
|
|
|
h128 m_cSecret;
|
|
bytes m_text;
|
|
|
|
Aes128Ctr* cryptor;
|
|
};
|
|
|
|
|
|
/**
|
|
* @brief Encrypted stream with inband SHA3 mac at specific interval.
|
|
*/
|
|
class AuthenticatedStream: public Stream
|
|
{
|
|
public:
|
|
AuthenticatedStream(StreamType _t, h128 _ckey, h128 _mackey, unsigned _interval): Stream(_t, _ckey), m_macSecret(_mackey) { m_macInterval = _interval; }
|
|
|
|
AuthenticatedStream(StreamType _t, Secret const& _s, unsigned _interval): Stream(_t, h128(_s)), m_macSecret(FixedHash<16>((byte const*)_s.data()+16,h128::ConstructFromPointer)) { m_macInterval = _interval; }
|
|
|
|
/// Adjust mac interval. Next mac will be xored with value.
|
|
void adjustInterval(unsigned _interval) { m_macInterval = _interval; }
|
|
|
|
private:
|
|
AuthenticatedStream(AuthenticatedStream const&) = delete;
|
|
AuthenticatedStream& operator=(AuthenticatedStream const&) = delete;
|
|
|
|
std::atomic<unsigned> m_macInterval;
|
|
h128 m_macSecret;
|
|
};
|
|
|
|
}
|
|
}
|
|
}
|