i2pd/Garlic.h

148 lines
4.3 KiB
C
Raw Normal View History

2013-11-23 21:35:15 +00:00
#ifndef GARLIC_H__
#define GARLIC_H__
#include <inttypes.h>
2013-11-24 23:10:27 +00:00
#include <map>
2014-05-12 02:37:33 +00:00
#include <list>
2013-11-24 23:10:27 +00:00
#include <string>
#include <thread>
2014-08-25 17:07:14 +00:00
#include <mutex>
#include <memory>
2013-11-24 23:10:27 +00:00
#include <cryptopp/osrng.h>
2014-05-12 02:37:33 +00:00
#include "aes.h"
2013-11-23 21:35:15 +00:00
#include "I2NPProtocol.h"
2013-11-24 23:10:27 +00:00
#include "LeaseSet.h"
#include "Queue.h"
2014-10-06 20:49:41 +00:00
#include "Identity.h"
2013-11-23 21:35:15 +00:00
namespace i2p
2013-11-24 23:10:27 +00:00
{
namespace garlic
2013-11-23 21:35:15 +00:00
{
2013-11-24 23:10:27 +00:00
2013-11-23 21:35:15 +00:00
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()
2013-11-24 23:10:27 +00:00
2014-10-18 02:15:42 +00:00
const int INCOMING_TAGS_EXPIRATION_TIMEOUT = 960; // 16 minutes
2014-10-17 01:11:02 +00:00
const int OUTGOING_TAGS_EXPIRATION_TIMEOUT = 720; // 12 minutes
2014-10-17 15:26:57 +00:00
struct SessionTag: public i2p::data::Tag<32>
{
SessionTag (const uint8_t * buf, uint32_t ts = 0): Tag<32>(buf), creationTime (ts) {};
SessionTag () = default;
SessionTag (const SessionTag& ) = default;
SessionTag& operator= (const SessionTag& ) = default;
#ifndef _WIN32
SessionTag (SessionTag&& ) = default;
SessionTag& operator= (SessionTag&& ) = default;
#endif
uint32_t creationTime; // seconds since epoch
};
2014-10-08 01:08:00 +00:00
class GarlicDestination;
2013-11-24 23:10:27 +00:00
class GarlicRoutingSession
{
2014-10-14 18:48:25 +00:00
struct UnconfirmedTags
{
UnconfirmedTags (int n): numTags (n), tagsCreationTime (0) { sessionTags = new SessionTag[numTags]; };
~UnconfirmedTags () { delete[] sessionTags; };
int numTags;
SessionTag * sessionTags;
uint32_t tagsCreationTime;
};
2013-11-24 23:10:27 +00:00
public:
2014-10-08 01:08:00 +00:00
GarlicRoutingSession (GarlicDestination * owner, const i2p::data::RoutingDestination * destination, int numTags);
2014-07-28 16:02:50 +00:00
GarlicRoutingSession (const uint8_t * sessionKey, const SessionTag& sessionTag); // one time encryption
2013-11-24 23:10:27 +00:00
~GarlicRoutingSession ();
I2NPMessage * WrapSingleMessage (I2NPMessage * msg);
2014-10-14 18:48:25 +00:00
void TagsConfirmed (uint32_t msgID);
void SetLeaseSetUpdated () { m_LeaseSetUpdated = true; };
2014-01-17 13:12:57 +00:00
2013-11-24 23:10:27 +00:00
private:
size_t CreateAESBlock (uint8_t * buf, const I2NPMessage * msg);
2014-10-17 00:12:46 +00:00
size_t CreateGarlicPayload (uint8_t * payload, const I2NPMessage * msg, UnconfirmedTags * newTags);
2014-03-20 13:47:02 +00:00
size_t CreateGarlicClove (uint8_t * buf, const I2NPMessage * msg, bool isDestination);
2014-01-09 03:47:22 +00:00
size_t CreateDeliveryStatusClove (uint8_t * buf, uint32_t msgID);
2013-11-24 23:10:27 +00:00
2014-10-17 00:12:46 +00:00
UnconfirmedTags * GenerateSessionTags ();
2014-01-18 15:34:57 +00:00
2013-11-24 23:10:27 +00:00
private:
2014-10-08 01:08:00 +00:00
GarlicDestination * m_Owner;
2014-07-28 15:54:34 +00:00
const i2p::data::RoutingDestination * m_Destination;
2013-11-24 23:10:27 +00:00
uint8_t m_SessionKey[32];
2014-10-17 00:12:46 +00:00
std::list<SessionTag> m_SessionTags;
int m_NumTags;
2014-10-14 18:48:25 +00:00
std::map<uint32_t, UnconfirmedTags *> m_UnconfirmedTagsMsgs;
bool m_LeaseSetUpdated;
2014-05-12 02:37:33 +00:00
i2p::crypto::CBCEncryption m_Encryption;
2013-11-24 23:10:27 +00:00
CryptoPP::AutoSeededRandomPool m_Rnd;
};
class GarlicDestination: public i2p::data::LocalDestination
{
public:
2014-10-18 02:15:42 +00:00
GarlicDestination (): m_LastTagsCleanupTime (0) {};
~GarlicDestination ();
GarlicRoutingSession * GetRoutingSession (const i2p::data::RoutingDestination& destination, int numTags);
I2NPMessage * WrapMessage (const i2p::data::RoutingDestination& destination,
I2NPMessage * msg, bool attachLeaseSet = false);
void AddSessionKey (const uint8_t * key, const uint8_t * tag); // one tag
2014-10-08 01:47:32 +00:00
void DeliveryStatusSent (GarlicRoutingSession * session, uint32_t msgID);
virtual void ProcessGarlicMessage (I2NPMessage * msg);
virtual void ProcessDeliveryStatusMessage (I2NPMessage * msg);
virtual void SetLeaseSetUpdated ();
2014-10-08 01:08:00 +00:00
virtual const i2p::data::LeaseSet * GetLeaseSet () = 0; // TODO
virtual void HandleI2NPMessage (const uint8_t * buf, size_t len, i2p::tunnel::InboundTunnel * from) = 0;
protected:
void HandleGarlicMessage (I2NPMessage * msg);
void HandleDeliveryStatusMessage (I2NPMessage * msg);
private:
void HandleAESBlock (uint8_t * buf, size_t len, std::shared_ptr<i2p::crypto::CBCDecryption> decryption,
i2p::tunnel::InboundTunnel * from);
void HandleGarlicPayload (uint8_t * buf, size_t len, i2p::tunnel::InboundTunnel * from);
private:
// outgoing sessions
std::mutex m_SessionsMutex;
std::map<i2p::data::IdentHash, GarlicRoutingSession *> m_Sessions;
// incoming
2014-10-18 02:15:42 +00:00
std::map<SessionTag, std::shared_ptr<i2p::crypto::CBCDecryption>> m_Tags;
uint32_t m_LastTagsCleanupTime;
2014-10-08 01:47:32 +00:00
// DeliveryStatus
std::map<uint32_t, GarlicRoutingSession *> m_CreatedSessions; // msgID -> session
};
2013-11-23 21:35:15 +00:00
}
2013-11-24 23:10:27 +00:00
}
2013-11-23 21:35:15 +00:00
#endif