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I2P: End-to-End encrypted and anonymous Internet
https://i2pd.website/
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85 lines
2.4 KiB
85 lines
2.4 KiB
#include <string.h> |
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#include "Log.h" |
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#include "RouterContext.h" |
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#include "I2NPProtocol.h" |
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#include "Tunnel.h" |
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#include "Transports.h" |
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#include "TransitTunnel.h" |
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namespace i2p |
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{ |
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namespace tunnel |
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{ |
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TransitTunnel::TransitTunnel (uint32_t receiveTunnelID, |
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const uint8_t * nextIdent, uint32_t nextTunnelID, |
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const uint8_t * layerKey,const uint8_t * ivKey, |
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bool isGateway, bool isEndpoint) |
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{ |
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memcpy (m_LayerKey, layerKey, 32); |
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memcpy (m_IVKey, ivKey, 32); |
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memcpy (m_NextIdent, nextIdent, 32); |
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m_IsGateway = isGateway; |
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m_IsEndpoint = isEndpoint; |
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m_TunnelID = receiveTunnelID; |
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m_NextTunnelID = nextTunnelID; |
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if (m_IsEndpoint) |
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LogPrint ("TransitTunnel endpoint: ", m_TunnelID, " created"); |
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else if (m_IsGateway) |
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LogPrint ("TransitTunnel gateway: ", m_TunnelID, " created"); |
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else |
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LogPrint ("TransitTunnel: ",m_TunnelID,"->", m_NextTunnelID, " created"); |
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} |
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void TransitTunnel::Encrypt (uint8_t * payload) |
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{ |
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m_ECBEncryption.SetKey (m_IVKey, 32); |
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m_ECBEncryption.ProcessData(payload, payload, 16); // iv |
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m_CBCEncryption.SetKeyWithIV (m_LayerKey, 32, payload); |
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m_CBCEncryption.ProcessData(payload + 16, payload + 16, 1008); // payload |
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m_ECBEncryption.SetKey (m_IVKey, 32); |
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m_ECBEncryption.ProcessData(payload, payload, 16); // double iv encryption |
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} |
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void TransitTunnel::HandleTunnelDataMsg (i2p::I2NPMessage * tunnelMsg) |
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{ |
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Encrypt (tunnelMsg->GetPayload () + 4); |
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if (m_IsEndpoint) |
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{ |
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LogPrint ("TransitTunnel endpoint for ", m_TunnelID); |
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m_Endpoint.HandleDecryptedTunnelDataMsg (tunnelMsg); |
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} |
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else |
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{ |
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LogPrint ("TransitTunnel: ",m_TunnelID,"->", m_NextTunnelID); |
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*(uint32_t *)(tunnelMsg->GetPayload ()) = htobe32 (m_NextTunnelID); |
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FillI2NPMessageHeader (tunnelMsg, eI2NPTunnelData); |
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i2p::transports.SendMessage (m_NextIdent, tunnelMsg); |
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} |
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} |
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void TransitTunnel::SendTunnelDataMsg (const uint8_t * gwHash, uint32_t gwTunnel, i2p::I2NPMessage * msg) |
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{ |
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if (m_IsGateway) |
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{ |
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m_Gateway.PutI2NPMsg (gwHash, gwTunnel, msg); |
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auto tunnelMsgs = m_Gateway.GetTunnelDataMsgs (m_NextTunnelID); |
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for (auto tunnelMsg : tunnelMsgs) |
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{ |
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Encrypt (tunnelMsg->GetPayload () + 4); |
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FillI2NPMessageHeader (tunnelMsg, eI2NPTunnelData); |
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i2p::transports.SendMessage (m_NextIdent, tunnelMsg); |
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} |
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} |
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else |
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{ |
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LogPrint ("We are not a gateway for transit tunnel ", m_TunnelID); |
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i2p::DeleteI2NPMessage (msg); |
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} |
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} |
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} |
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} |