Mirrors/i2pd
2
0
Fork 0
mirror of https://github.com/PurpleI2P/i2pd.git synced 2025-04-28 11:47:48 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

NTCP2 session establisher

Browse source
This commit is contained in:
orignal 2018-07-03 16:26:02 -04:00
parent 55af4ed385
commit 6054bd6621
2 changed files with 118 additions and 106 deletions
Download patch file Download diff file Expand all files Collapse all files

27
libi2pd/NTCP2.h
View file

@ -4,6 +4,7 @@
#include <inttypes.h>
#include <memory>
#include <thread>
#include <openssl/bn.h>
#include <boost/asio.hpp>
#include "RouterInfo.h"
#include "TransportSession.h"
@ -12,6 +13,25 @@ namespace i2p
{
namespace transport
{
struct NTCP2Establisher
{
NTCP2Establisher () { m_Ctx = BN_CTX_new (); };
~NTCP2Establisher () { BN_CTX_free (m_Ctx); };
const uint8_t * GetCK () const { return m_CK; };
const uint8_t * GetH () const { return m_H; };
void MixKey (const uint8_t * inputKeyMaterial, uint8_t * derived);
void KeyDerivationFunction1 (const uint8_t * rs, const uint8_t * priv, const uint8_t * pub, uint8_t * derived); // for SessionRequest
void KeyDerivationFunction2 (const uint8_t * priv, const uint8_t * pub, const uint8_t * sessionRequest, size_t sessionRequestLen, uint8_t * derived); // for SessionCreate
void CreateEphemeralKey (uint8_t * pub);
BN_CTX * m_Ctx;
uint8_t m_EphemeralPrivateKey[32]; // x25519
uint8_t m_RemoteStaticKey[32], m_IV[16], m_H[32] /*h*/, m_CK[33] /*ck*/, m_K[32] /* derived after SessionCreated */, m_Y[32] /* or X for Bob */;
};
class NTCP2Server;
class NTCP2Session: public TransportSession, public std::enable_shared_from_this<NTCP2Session>
{
@ -30,15 +50,11 @@ namespace transport
private:
void MixKey (const uint8_t * inputKeyMaterial, uint8_t * derived);
void CreateNonce (uint64_t seqn, uint8_t * nonce);
void KeyDerivationFunction1 (const uint8_t * rs, const uint8_t * priv, const uint8_t * pub, uint8_t * derived); // for SessionRequest
void KeyDerivationFunction2 (const uint8_t * priv, const uint8_t * pub, const uint8_t * sessionRequest, size_t sessionRequestLen, uint8_t * derived); // for SessionCreate
void KeyDerivationFunction3 (const uint8_t * staticPrivKey, uint8_t * derived); // for SessionConfirmed part 2
void KeyDerivationFunctionDataPhase ();
// establish
void CreateEphemeralKey (uint8_t * pub);
void SendSessionRequest ();
void SendSessionCreated ();
void SendSessionConfirmed ();
@ -67,8 +83,7 @@ namespace transport
boost::asio::ip::tcp::socket m_Socket;
bool m_IsEstablished, m_IsTerminated;
uint8_t m_EphemeralPrivateKey[32]; // x25519
uint8_t m_RemoteStaticKey[32], m_IV[16], m_H[32] /*h*/, m_CK[33] /*ck*/, m_K[32] /* derived after SessionCreated */, m_Y[32] /* or X for Bob */;
std::unique_ptr<NTCP2Establisher> m_Establisher;
uint8_t * m_SessionRequestBuffer, * m_SessionCreatedBuffer, * m_SessionConfirmedBuffer;
size_t m_SessionRequestBufferLen, m_SessionCreatedBufferLen;
// data phase