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Encrypt/Decrypt/Validate SSU packet

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orignal 2014-01-28 16:49:54 -05:00
parent f69965f168
commit 58386bb88e
2 changed files with 130 additions and 11 deletions
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25
SSU.h
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@ -7,6 +7,7 @@
#include <cryptopp/modes.h>
#include <cryptopp/aes.h>
#include "I2PEndian.h"
#include "RouterInfo.h"
namespace i2p
{
@ -46,21 +47,30 @@ namespace ssu
eSessionStateEstablised
};
class SSUServer;
class SSUSession
{
public:
SSUSession ();
void ProcessNextMessage (uint8_t * buf, size_t len);
SSUSession (SSUServer * server, const boost::asio::ip::udp::endpoint& remoteEndpoint,
i2p::data::RouterInfo * router = nullptr);
void ProcessNextMessage (uint8_t * buf, size_t len);
private:
void Authenticate (uint8_t * buf, size_t len, uint8_t * aesKey, uint8_t * iv, uint8_t * macKey);
void ProcessSessionRequest (uint8_t * buf, size_t len);
void Encrypt (uint8_t * buf, size_t len, uint8_t * aesKey, uint8_t * iv, uint8_t * macKey);
void Decrypt (uint8_t * buf, size_t len, uint8_t * aesKey);
bool Validate (uint8_t * buf, size_t len, uint8_t * macKey);
private:
SSUServer * m_Server;
boost::asio::ip::udp::endpoint m_RemoteEndpoint;
SessionState m_State;
CryptoPP::CBC_Mode<CryptoPP::AES>::Encryption m_Encryption;
CryptoPP::CBC_Mode<CryptoPP::AES>::Encryption m_Encryption;
CryptoPP::CBC_Mode<CryptoPP::AES>::Decryption m_Decryption;
};
class SSUServer
@ -71,6 +81,9 @@ namespace ssu
~SSUServer ();
void Start ();
void Stop ();
SSUSession * GetSession (i2p::data::RouterInfo * router);
void Send (uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& to);
private:
@ -81,7 +94,7 @@ namespace ssu
boost::asio::ip::udp::socket m_Socket;
boost::asio::ip::udp::endpoint m_SenderEndpoint;
uint8_t m_ReceiveBuffer[SSU_MTU];
uint8_t m_ReceiveBuffer[2*SSU_MTU];
std::map<boost::asio::ip::udp::endpoint, SSUSession *> m_Sessions;
};
}