i2pd/Garlic.h
2013-11-24 18:10:27 -05:00

80 lines
1.6 KiB
C++

#ifndef GARLIC_H__
#define GARLIC_H__
#include <inttypes.h>
#include <map>
#include <string>
#include <cryptopp/modes.h>
#include <cryptopp/aes.h>
#include <cryptopp/osrng.h>
#include "I2NPProtocol.h"
#include "LeaseSet.h"
namespace i2p
{
namespace garlic
{
enum GarlicDeliveryType
{
eGarlicDeliveryTypeLocal = 0,
eGarlicDeliveryTypeDestination = 1,
eGarlicDeliveryTypeRouter = 2,
eGarlicDeliveryTypeTunnel = 3
};
#pragma pack(1)
struct ElGamalBlock
{
uint8_t sessionKey[32];
uint8_t preIV[32];
uint8_t padding[158];
};
#pragma pack()
class GarlicRoutingSession
{
public:
GarlicRoutingSession (const i2p::data::RoutingDestination * destination, int numTags);
~GarlicRoutingSession ();
I2NPMessage * WrapSingleMessage (I2NPMessage * msg);
int GetNumRemainingSessionTags () const { return m_NumTags - m_NextTag; };
private:
size_t CreateAESBlock (uint8_t * buf, I2NPMessage * msg);
size_t CreateGarlicPayload (uint8_t * payload, I2NPMessage * msg);
private:
const i2p::data::RoutingDestination * m_Destination;
uint8_t m_SessionKey[32];
int m_NumTags, m_NextTag;
uint8_t * m_SessionTags; // m_NumTags*32 bytes
CryptoPP::CBC_Mode<CryptoPP::AES>::Encryption m_Encryption;
CryptoPP::AutoSeededRandomPool m_Rnd;
};
class GarlicRouting
{
public:
GarlicRouting ();
~GarlicRouting ();
I2NPMessage * WrapSingleMessage (const i2p::data::RoutingDestination * destination, I2NPMessage * msg);
private:
std::map<std::string, GarlicRoutingSession *> m_Sessions;
};
extern GarlicRouting routing;
}
}
#endif