mirror of https://github.com/PurpleI2P/i2pd.git
I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
85 lines
2.4 KiB
85 lines
2.4 KiB
11 years ago
|
#include <string.h>
|
||
|
|
#include "Log.h"
|
||
|
|
#include "RouterContext.h"
|
||
|
|
#include "I2NPProtocol.h"
|
||
|
|
#include "Tunnel.h"
|
||
|
|
#include "Transports.h"
|
||
|
|
#include "TransitTunnel.h"
|
||
|
|
|
||
|
|
namespace i2p
|
||
|
|
{
|
||
|
|
namespace tunnel
|
||
|
|
{
|
||
|
|
TransitTunnel::TransitTunnel (uint32_t receiveTunnelID,
|
||
|
|
const uint8_t * nextIdent, uint32_t nextTunnelID,
|
||
|
|
const uint8_t * layerKey,const uint8_t * ivKey,
|
||
|
|
bool isGateway, bool isEndpoint)
|
||
|
|
{
|
||
|
|
memcpy (m_LayerKey, layerKey, 32);
|
||
|
|
memcpy (m_IVKey, ivKey, 32);
|
||
|
|
memcpy (m_NextIdent, nextIdent, 32);
|
||
|
|
m_IsGateway = isGateway;
|
||
|
|
m_IsEndpoint = isEndpoint;
|
||
|
|
m_TunnelID = receiveTunnelID;
|
||
|
|
m_NextTunnelID = nextTunnelID;
|
||
|
|
if (m_IsEndpoint)
|
||
|
|
LogPrint ("TransitTunnel endpoint: ", m_TunnelID, " created");
|
||
|
|
else if (m_IsGateway)
|
||
|
|
LogPrint ("TransitTunnel gateway: ", m_TunnelID, " created");
|
||
|
|
else
|
||
|
|
LogPrint ("TransitTunnel: ",m_TunnelID,"->", m_NextTunnelID, " created");
|
||
|
|
}
|
||
|
|
|
||
|
|
void TransitTunnel::Encrypt (uint8_t * payload)
|
||
|
|
{
|
||
|
|
m_ECBEncryption.SetKey (m_IVKey, 32);
|
||
|
|
m_ECBEncryption.ProcessData(payload, payload, 16); // iv
|
||
|
|
|
||
|
|
m_CBCEncryption.SetKeyWithIV (m_LayerKey, 32, payload);
|
||
|
|
m_CBCEncryption.ProcessData(payload + 16, payload + 16, 1008); // payload
|
||
|
|
|
||
|
|
m_ECBEncryption.SetKey (m_IVKey, 32);
|
||
|
|
m_ECBEncryption.ProcessData(payload, payload, 16); // double iv encryption
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
void TransitTunnel::HandleTunnelDataMsg (i2p::I2NPMessage * tunnelMsg)
|
||
|
|
{
|
||
|
|
Encrypt (tunnelMsg->GetPayload () + 4);
|
||
|
|
|
||
|
|
if (m_IsEndpoint)
|
||
|
|
{
|
||
|
|
LogPrint ("TransitTunnel endpoint for ", m_TunnelID);
|
||
|
|
m_Endpoint.HandleDecryptedTunnelDataMsg (tunnelMsg);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
LogPrint ("TransitTunnel: ",m_TunnelID,"->", m_NextTunnelID);
|
||
|
|
*(uint32_t *)(tunnelMsg->GetPayload ()) = htobe32 (m_NextTunnelID);
|
||
|
|
FillI2NPMessageHeader (tunnelMsg, eI2NPTunnelData);
|
||
|
|
|
||
|
|
i2p::transports.SendMessage (m_NextIdent, tunnelMsg);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void TransitTunnel::SendTunnelDataMsg (const uint8_t * gwHash, uint32_t gwTunnel, i2p::I2NPMessage * msg)
|
||
|
|
{
|
||
|
|
if (m_IsGateway)
|
||
|
|
{
|
||
|
|
m_Gateway.PutI2NPMsg (gwHash, gwTunnel, msg);
|
||
|
|
auto tunnelMsgs = m_Gateway.GetTunnelDataMsgs (m_NextTunnelID);
|
||
|
|
for (auto tunnelMsg : tunnelMsgs)
|
||
|
|
{
|
||
|
|
Encrypt (tunnelMsg->GetPayload () + 4);
|
||
|
|
FillI2NPMessageHeader (tunnelMsg, eI2NPTunnelData);
|
||
|
|
i2p::transports.SendMessage (m_NextIdent, tunnelMsg);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
LogPrint ("We are not a gateway for transit tunnel ", m_TunnelID);
|
||
|
|
i2p::DeleteI2NPMessage (msg);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|