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Inroduced IdentHash

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orignal 2013-11-29 07:52:09 -05:00
parent fbbcc69c72
commit 885e996a8a
12 changed files with 239 additions and 125 deletions
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89
TransitTunnel.cpp
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@ -12,31 +12,21 @@ 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)
const uint8_t * layerKey,const uint8_t * ivKey):
m_TunnelID (receiveTunnelID), m_NextTunnelID (nextTunnelID), m_NextIdent (nextIdent)
{
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)
void TransitTunnel::EncryptTunnelMsg (I2NPMessage * tunnelMsg)
{
uint8_t * payload = tunnelMsg->GetPayload () + 4;
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_CBCEncryption.ProcessData(payload + 16, payload + 16, TUNNEL_DATA_ENCRYPTED_SIZE); // payload
m_ECBEncryption.SetKey (m_IVKey, 32);
m_ECBEncryption.ProcessData(payload, payload, 16); // double iv encryption
@ -45,40 +35,53 @@ namespace tunnel
void TransitTunnel::HandleTunnelDataMsg (i2p::I2NPMessage * tunnelMsg)
{
Encrypt (tunnelMsg->GetPayload () + 4);
EncryptTunnelMsg (tunnelMsg);
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);
}
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)
{
LogPrint ("We are not a gateway for transit tunnel ", m_TunnelID);
i2p::DeleteI2NPMessage (msg);
}
void TransitTunnelGateway::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
m_Gateway.SendTunnelDataMsg (gwHash, gwTunnel, msg);
}
void TransitTunnelEndpoint::HandleTunnelDataMsg (i2p::I2NPMessage * tunnelMsg)
{
EncryptTunnelMsg (tunnelMsg);
LogPrint ("TransitTunnel endpoint for ", GetTunnelID ());
m_Endpoint.HandleDecryptedTunnelDataMsg (tunnelMsg);
}
TransitTunnel * CreateTransitTunnel (uint32_t receiveTunnelID,
const uint8_t * nextIdent, uint32_t nextTunnelID,
const uint8_t * layerKey,const uint8_t * ivKey,
bool isGateway, bool isEndpoint)
{
if (isEndpoint)
{
LogPrint ("We are not a gateway for transit tunnel ", m_TunnelID);
i2p::DeleteI2NPMessage (msg);
LogPrint ("TransitTunnel endpoint: ", receiveTunnelID, " created");
return new TransitTunnelEndpoint (receiveTunnelID, nextIdent, nextTunnelID, layerKey, ivKey);
}
else if (isGateway)
{
LogPrint ("TransitTunnel gateway: ", receiveTunnelID, " created");
return new TransitTunnelGateway (receiveTunnelID, nextIdent, nextTunnelID, layerKey, ivKey);
}
else
{
LogPrint ("TransitTunnel: ", receiveTunnelID, "->", nextTunnelID, " created");
return new TransitTunnel (receiveTunnelID, nextIdent, nextTunnelID, layerKey, ivKey);
}
}
}