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handle and send SessionRequest message

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orignal 2014-01-29 16:49:53 -05:00
parent 58386bb88e
commit 21693fc1e5
2 changed files with 137 additions and 16 deletions
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22
SSU.h
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@ -8,6 +8,7 @@
#include <cryptopp/aes.h>
#include "I2PEndian.h"
#include "RouterInfo.h"
#include "I2NPProtocol.h"
namespace i2p
{
@ -25,7 +26,7 @@ namespace ssu
const int SSU_MTU = 1484;
// payload types (4 bits)
// payload types (3 bits)
const uint8_t PAYLOAD_TYPE_SESSION_REQUEST = 0;
const uint8_t PAYLOAD_TYPE_SESSION_CREATED = 1;
const uint8_t PAYLOAD_TYPE_SESSION_CONFIRMED = 2;
@ -54,13 +55,22 @@ namespace ssu
SSUSession (SSUServer * server, const boost::asio::ip::udp::endpoint& remoteEndpoint,
i2p::data::RouterInfo * router = nullptr);
void ProcessNextMessage (uint8_t * buf, size_t len);
void ProcessNextMessage (uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& senderEndpoint);
void Connect ();
void SendI2NPMessage (I2NPMessage * msg);
private:
void ProcessSessionRequest (uint8_t * buf, size_t len);
void CreateAESKey (uint8_t * pubKey, uint8_t * aesKey); // TODO: shouldn't be here
void Encrypt (uint8_t * buf, size_t len, uint8_t * aesKey, uint8_t * iv, uint8_t * macKey);
void ProcessSessionRequest (uint8_t * buf, size_t len, const boost::asio::ip::udp::endpoint& senderEndpoint);
void SendSessionRequest ();
void ProcessSessionCreated (uint8_t * buf, size_t len);
void SendSessionCreated (const boost::asio::ip::udp::endpoint& senderEndpoint);
bool ProcessIntroKeyEncryptedMessage (uint8_t expectedPayloadType, uint8_t * buf, size_t len);
void FillHeaderAndEncrypt (uint8_t payloadType, 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);
@ -68,9 +78,11 @@ namespace ssu
SSUServer * m_Server;
boost::asio::ip::udp::endpoint m_RemoteEndpoint;
i2p::data::RouterInfo * m_RemoteRouter;
SessionState m_State;
CryptoPP::CBC_Mode<CryptoPP::AES>::Encryption m_Encryption;
CryptoPP::CBC_Mode<CryptoPP::AES>::Decryption m_Decryption;
CryptoPP::CBC_Mode<CryptoPP::AES>::Decryption m_Decryption;
uint8_t m_SessionKey[32];
};
class SSUServer