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separate ratchet session for ECIES router

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orignal 2021-03-03 15:30:13 -05:00
parent def9873a70
commit 065cfe3b9d
4 changed files with 64 additions and 36 deletions
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19
libi2pd/ECIESX25519AEADRatchetSession.h
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@ -164,7 +164,6 @@ namespace garlic
~ECIESX25519AEADRatchetSession ();
bool HandleNextMessage (uint8_t * buf, size_t len, std::shared_ptr<ReceiveRatchetTagSet> receiveTagset, int index = 0);
bool HandleNextMessageForRouter (const uint8_t * buf, size_t len);
std::shared_ptr<I2NPMessage> WrapSingleMessage (std::shared_ptr<const I2NPMessage> msg);
std::shared_ptr<I2NPMessage> WrapOneTimeMessage (std::shared_ptr<const I2NPMessage> msg, bool isForRouter = false);
@ -186,16 +185,21 @@ namespace garlic
bool IsTerminated () const { return m_IsTerminated; }
uint64_t GetLastActivityTimestamp () const { return m_LastActivityTimestamp; };
protected:
i2p::crypto::NoiseSymmetricState& GetNoiseState () { return *this; };
void SetNoiseState (const i2p::crypto::NoiseSymmetricState& state) { GetNoiseState () = state; };
void CreateNonce (uint64_t seqn, uint8_t * nonce);
void HandlePayload (const uint8_t * buf, size_t len, const std::shared_ptr<ReceiveRatchetTagSet>& receiveTagset, int index);
private:
void CreateNonce (uint64_t seqn, uint8_t * nonce);
bool GenerateEphemeralKeysAndEncode (uint8_t * buf); // buf is 32 bytes
void InitNewSessionTagset (std::shared_ptr<RatchetTagSet> tagsetNsr) const;
bool HandleNewIncomingSession (const uint8_t * buf, size_t len);
bool HandleNewOutgoingSessionReply (uint8_t * buf, size_t len);
bool HandleExistingSessionMessage (uint8_t * buf, size_t len, std::shared_ptr<ReceiveRatchetTagSet> receiveTagset, int index);
void HandlePayload (const uint8_t * buf, size_t len, const std::shared_ptr<ReceiveRatchetTagSet>& receiveTagset, int index);
void HandleNextKey (const uint8_t * buf, size_t len, const std::shared_ptr<ReceiveRatchetTagSet>& receiveTagset);
bool NewOutgoingSessionMessage (const uint8_t * payload, size_t len, uint8_t * out, size_t outLen, bool isStatic = true);
@ -237,6 +241,15 @@ namespace garlic
}
};
// single session for all incoming messages
class RouterIncomingRatchetSession: public ECIESX25519AEADRatchetSession
{
public:
RouterIncomingRatchetSession (const i2p::crypto::NoiseSymmetricState& initState);
bool HandleNextMessage (const uint8_t * buf, size_t len);
};
std::shared_ptr<I2NPMessage> WrapECIESX25519AEADRatchetMessage (std::shared_ptr<const I2NPMessage> msg, const uint8_t * key, uint64_t tag);
}
}