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don't create encryption for new transit tunnel immediately

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orignal 2022-12-25 09:36:16 -05:00
parent 6376328c98
commit 5ef5f5a170
4 changed files with 30 additions and 23 deletions
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3
libi2pd/I2NPProtocol.cpp
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@ -558,7 +558,8 @@ namespace i2p
return;
}
auto& noiseState = i2p::context.GetCurrentNoiseState ();
uint8_t replyKey[32], layerKey[32], ivKey[32];
uint8_t replyKey[32]; // AEAD/Chacha20/Poly1305
i2p::crypto::AESKey layerKey, ivKey; // AES
i2p::crypto::HKDF (noiseState.m_CK, nullptr, 0, "SMTunnelReplyKey", noiseState.m_CK);
memcpy (replyKey, noiseState.m_CK + 32, 32);
i2p::crypto::HKDF (noiseState.m_CK, nullptr, 0, "SMTunnelLayerKey", noiseState.m_CK);

21
libi2pd/TransitTunnel.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2021, The PurpleI2P Project
* Copyright (c) 2013-2022, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
@ -20,16 +20,21 @@ namespace i2p
namespace tunnel
{
TransitTunnel::TransitTunnel (uint32_t receiveTunnelID,
const uint8_t * nextIdent, uint32_t nextTunnelID,
const uint8_t * layerKey,const uint8_t * ivKey):
TunnelBase (receiveTunnelID, nextTunnelID, nextIdent)
const i2p::data::IdentHash& nextIdent, uint32_t nextTunnelID,
const i2p::crypto::AESKey& layerKey, const i2p::crypto::AESKey& ivKey):
TunnelBase (receiveTunnelID, nextTunnelID, nextIdent),
m_LayerKey (layerKey), m_IVKey (ivKey)
{
m_Encryption.SetKeys (layerKey, ivKey);
}
void TransitTunnel::EncryptTunnelMsg (std::shared_ptr<const I2NPMessage> in, std::shared_ptr<I2NPMessage> out)
{
m_Encryption.Encrypt (in->GetPayload () + 4, out->GetPayload () + 4);
if (!m_Encryption)
{
m_Encryption.reset (new i2p::crypto::TunnelEncryption);
m_Encryption->SetKeys (m_LayerKey, m_IVKey);
}
m_Encryption->Encrypt (in->GetPayload () + 4, out->GetPayload () + 4);
i2p::transport::transports.UpdateTotalTransitTransmittedBytes (TUNNEL_DATA_MSG_SIZE);
}
@ -94,8 +99,8 @@ namespace tunnel
}
std::shared_ptr<TransitTunnel> CreateTransitTunnel (uint32_t receiveTunnelID,
const uint8_t * nextIdent, uint32_t nextTunnelID,
const uint8_t * layerKey,const uint8_t * ivKey,
const i2p::data::IdentHash& nextIdent, uint32_t nextTunnelID,
const i2p::crypto::AESKey& layerKey, const i2p::crypto::AESKey& ivKey,
bool isGateway, bool isEndpoint)
{
if (isEndpoint)

25
libi2pd/TransitTunnel.h
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2021, The PurpleI2P Project
* Copyright (c) 2013-2022, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
@ -28,8 +28,8 @@ namespace tunnel
public:
TransitTunnel (uint32_t receiveTunnelID,
const uint8_t * nextIdent, uint32_t nextTunnelID,
const uint8_t * layerKey,const uint8_t * ivKey);
const i2p::data::IdentHash& nextIdent, uint32_t nextTunnelID,
const i2p::crypto::AESKey& layerKey, const i2p::crypto::AESKey& ivKey);
virtual size_t GetNumTransmittedBytes () const { return 0; };
@ -39,7 +39,8 @@ namespace tunnel
void EncryptTunnelMsg (std::shared_ptr<const I2NPMessage> in, std::shared_ptr<I2NPMessage> out);
private:
i2p::crypto::TunnelEncryption m_Encryption;
i2p::crypto::AESKey m_LayerKey, m_IVKey;
std::unique_ptr<i2p::crypto::TunnelEncryption> m_Encryption;
};
class TransitTunnelParticipant: public TransitTunnel
@ -47,8 +48,8 @@ namespace tunnel
public:
TransitTunnelParticipant (uint32_t receiveTunnelID,
const uint8_t * nextIdent, uint32_t nextTunnelID,
const uint8_t * layerKey,const uint8_t * ivKey):
const i2p::data::IdentHash& nextIdent, uint32_t nextTunnelID,
const i2p::crypto::AESKey& layerKey, const i2p::crypto::AESKey& ivKey):
TransitTunnel (receiveTunnelID, nextIdent, nextTunnelID,
layerKey, ivKey), m_NumTransmittedBytes (0) {};
~TransitTunnelParticipant ();
@ -68,8 +69,8 @@ namespace tunnel
public:
TransitTunnelGateway (uint32_t receiveTunnelID,
const uint8_t * nextIdent, uint32_t nextTunnelID,
const uint8_t * layerKey,const uint8_t * ivKey):
const i2p::data::IdentHash& nextIdent, uint32_t nextTunnelID,
const i2p::crypto::AESKey& layerKey, const i2p::crypto::AESKey& ivKey):
TransitTunnel (receiveTunnelID, nextIdent, nextTunnelID,
layerKey, ivKey), m_Gateway(this) {};
@ -88,8 +89,8 @@ namespace tunnel
public:
TransitTunnelEndpoint (uint32_t receiveTunnelID,
const uint8_t * nextIdent, uint32_t nextTunnelID,
const uint8_t * layerKey,const uint8_t * ivKey):
const i2p::data::IdentHash& nextIdent, uint32_t nextTunnelID,
const i2p::crypto::AESKey& layerKey, const i2p::crypto::AESKey& ivKey):
TransitTunnel (receiveTunnelID, nextIdent, nextTunnelID, layerKey, ivKey),
m_Endpoint (false) {}; // transit endpoint is always outbound
@ -104,8 +105,8 @@ namespace tunnel
};
std::shared_ptr<TransitTunnel> CreateTransitTunnel (uint32_t receiveTunnelID,
const uint8_t * nextIdent, uint32_t nextTunnelID,
const uint8_t * layerKey,const uint8_t * ivKey,
const i2p::data::IdentHash& nextIdent, uint32_t nextTunnelID,
const i2p::crypto::AESKey& layerKey, const i2p::crypto::AESKey& ivKey,
bool isGateway, bool isEndpoint);
}
}

4
libi2pd/TunnelBase.h
View File

@ -1,5 +1,5 @@
/*
* Copyright (c) 2013-2020, The PurpleI2P Project
* Copyright (c) 2013-2022, The PurpleI2P Project
*
* This file is part of Purple i2pd project and licensed under BSD3
*
@ -41,7 +41,7 @@ namespace tunnel
{
public:
TunnelBase (uint32_t tunnelID, uint32_t nextTunnelID, i2p::data::IdentHash nextIdent):
TunnelBase (uint32_t tunnelID, uint32_t nextTunnelID, const i2p::data::IdentHash& nextIdent):
m_TunnelID (tunnelID), m_NextTunnelID (nextTunnelID), m_NextIdent (nextIdent),
m_CreationTime (i2p::util::GetSecondsSinceEpoch ()) {};
virtual ~TunnelBase () {};