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recognize and verify datagram3

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orignal 2025-06-24 18:00:02 -04:00
parent 75dd0d72c6
commit 40b90ccea4
4 changed files with 61 additions and 17 deletions
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52
libi2pd/Datagram.cpp
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@ -126,6 +126,34 @@ namespace datagram
LogPrint (eLogWarning, "DatagramDestination: no receiver for raw datagram");
}
void DatagramDestination::HandleDatagram3 (uint16_t fromPort, uint16_t toPort, const uint8_t * buf, size_t len,
i2p::garlic::ECIESX25519AEADRatchetSession * from)
{
if (from)
{
i2p::data::IdentHash ident(buf);
auto ls = m_Owner->FindLeaseSet (ident);
if (ls)
{
uint8_t staticKey[32];
ls->Encrypt (nullptr, staticKey);
if (!memcmp (from->GetRemoteStaticKey (), staticKey, 32))
{
auto session = ObtainSession (ident);
session->SetRemoteLeaseSet (ls);
session->Ack ();
// TODO:
}
else
LogPrint (eLogError, "Datagram: Remote LeaseSet static key mismatch for datagram3 from ", ident.ToBase32 ());
}
else
LogPrint (eLogError, "Datagram: No remote LeaseSet for ", ident.ToBase32 ());
}
else
LogPrint (eLogInfo, "Datagram: datagram3 received from non-ratchets session");
}
void DatagramDestination::SetReceiver (const Receiver& receiver, uint16_t port)
{
std::lock_guard<std::mutex> lock(m_ReceiversMutex);
@ -194,17 +222,31 @@ namespace datagram
return r;
}
void DatagramDestination::HandleDataMessagePayload (uint16_t fromPort, uint16_t toPort, const uint8_t * buf, size_t len, bool isRaw)
void DatagramDestination::HandleDataMessagePayload (uint16_t fromPort, uint16_t toPort,
const uint8_t * buf, size_t len, uint8_t protocolType, i2p::garlic::ECIESX25519AEADRatchetSession * from)
{
// unzip it
uint8_t uncompressed[MAX_DATAGRAM_SIZE];
size_t uncompressedLen = m_Inflator.Inflate (buf, len, uncompressed, MAX_DATAGRAM_SIZE);
if (uncompressedLen)
{
if (isRaw)
HandleRawDatagram (fromPort, toPort, uncompressed, uncompressedLen);
else
HandleDatagram (fromPort, toPort, uncompressed, uncompressedLen);
switch (protocolType)
{
case i2p::client::PROTOCOL_TYPE_RAW:
HandleRawDatagram (fromPort, toPort, uncompressed, uncompressedLen);
break;
case i2p::client::PROTOCOL_TYPE_DATAGRAM3:
HandleDatagram3 (fromPort, toPort, uncompressed, uncompressedLen, from);
break;
case i2p::client::PROTOCOL_TYPE_DATAGRAM:
HandleDatagram (fromPort, toPort, uncompressed, uncompressedLen);
break;
case i2p::client::PROTOCOL_TYPE_DATAGRAM2:
// TODO:
break;
default:
LogPrint (eLogInfo, "Datagram: unknown protocol type ", protocolType);
};
}
else
LogPrint (eLogWarning, "Datagram: decompression failed");