I2P: End-to-End encrypted and anonymous Internet https://i2pd.website/
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.

92 lines
1.8 KiB

/*
* Copyright (c) 2022, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
* See full license text in LICENSE file at top of project tree
*/
#ifndef SSU2_H__
#define SSU2_H__
#include <memory>
#include <unordered_map>
#include "Crypto.h"
#include "RouterInfo.h"
#include "TransportSession.h"
namespace i2p
{
namespace transport
{
const int SSU2_TERMINATION_TIMEOUT = 330; // 5.5 minutes
enum SSU2MessageType
{
eSSU2SessionRequest = 0
};
class SSU2Server;
class SSU2Session: public TransportSession, public std::enable_shared_from_this<SSU2Session>
{
union Header
{
uint64_t ll[2];
uint8_t buf[16];
struct
{
uint8_t connID[8];
uint8_t packetNum[4];
uint8_t type;
uint8_t flags[3];
} h;
};
public:
SSU2Session (SSU2Server& server, std::shared_ptr<const i2p::data::RouterInfo> in_RemoteRouter = nullptr,
std::shared_ptr<const i2p::data::RouterInfo::Address> addr = nullptr, bool peerTest = false);
~SSU2Session ();
private:
void SendSessionRequest ();
void EncryptHeader (Header& h);
void CreateHeaderMask (const uint8_t * kh1, const uint8_t * nonce1, const uint8_t * kh2, const uint8_t * nonce2);
private:
SSU2Server& m_Server;
std::shared_ptr<i2p::crypto::X25519Keys> m_EphemeralKeys;
std::unique_ptr<i2p::crypto::NoiseSymmetricState> m_NoiseState;
std::shared_ptr<const i2p::data::RouterInfo::Address> m_Address;
union
{
uint64_t ll[2];
uint8_t buf[16];
} m_HeaderMask;
};
class SSU2Server
{
public:
SSU2Server (int port) {};
~SSU2Server () {};
void AddSession (uint64_t connID, std::shared_ptr<SSU2Session> session);
private:
void ProcessNextPacket (uint8_t * buf, size_t len);
private:
std::unordered_map<uint64_t, std::shared_ptr<SSU2Session> > m_Sessions;
};
}
}
#endif