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encrypt tunnel tests for ElGamal-only destinations

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orignal 2024-02-27 11:47:32 -05:00
parent 6656ef3c8d
commit b86c83a068
2 changed files with 22 additions and 20 deletions
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40
libi2pd/TunnelPool.cpp
View File

@ -366,6 +366,7 @@ namespace tunnel
}
// new tests
if (!m_LocalDestination) return;
std::vector<std::pair<std::shared_ptr<OutboundTunnel>, std::shared_ptr<InboundTunnel> > > newTests;
std::vector<std::shared_ptr<OutboundTunnel> > outboundTunnels;
{
@ -390,7 +391,7 @@ namespace tunnel
newTests.push_back(std::make_pair (*it1, *it2));
++it1; ++it2;
}
bool encrypt = m_LocalDestination ? m_LocalDestination->SupportsEncryptionType (i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD) : false;
bool isECIES = m_LocalDestination->SupportsEncryptionType (i2p::data::CRYPTO_KEY_TYPE_ECIES_X25519_AEAD);
for (auto& it: newTests)
{
uint32_t msgID;
@ -399,7 +400,7 @@ namespace tunnel
std::unique_lock<std::mutex> l(m_TestsMutex);
m_Tests[msgID] = it;
}
auto msg = encrypt ? CreateTunnelTestMsg (msgID) : CreateDeliveryStatusMsg (msgID);
auto msg = CreateTunnelTestMsg (msgID);
auto outbound = it.first;
auto s = shared_from_this ();
msg->onDrop = [msgID, outbound, s]()
@ -414,14 +415,22 @@ namespace tunnel
std::unique_lock<std::mutex> l(s->m_OutboundTunnelsMutex);
s->m_OutboundTunnels.erase (outbound);
}
};
if (encrypt)
};
// encrypt
if (isECIES)
{
// encrypt
uint8_t key[32]; RAND_bytes (key, 32);
uint64_t tag; RAND_bytes ((uint8_t *)&tag, 8);
m_LocalDestination->SubmitECIESx25519Key (key, tag);
msg = i2p::garlic::WrapECIESX25519Message (msg, key, tag);
}
else
{
uint8_t key[32], tag[32];
RAND_bytes (key, 32); RAND_bytes (tag, 32);
m_LocalDestination->SubmitSessionKey (key, tag);
i2p::garlic::ElGamalAESSession garlic (key, tag);
msg = garlic.WrapSingleMessage (msg);
}
outbound->SendTunnelDataMsgTo (it.second->GetNextIdentHash (), it.second->GetNextTunnelID (), msg);
}
@ -449,16 +458,11 @@ namespace tunnel
{
const uint8_t * buf = msg->GetPayload ();
uint32_t msgID = bufbe32toh (buf);
buf += 4;
uint64_t timestamp = bufbe64toh (buf); // milliseconds since epoch
if (!ProcessTunnelTest (msgID, timestamp, false)) // if non encrypted test
{
if (m_LocalDestination)
m_LocalDestination->ProcessDeliveryStatusMessage (msg);
else
LogPrint (eLogWarning, "Tunnels: Local destination doesn't exist, dropped");
}
if (m_LocalDestination)
m_LocalDestination->ProcessDeliveryStatusMessage (msg);
else
LogPrint (eLogWarning, "Tunnels: Local destination doesn't exist, dropped");
}
void TunnelPool::ProcessTunnelTest (std::shared_ptr<I2NPMessage> msg)
@ -471,7 +475,7 @@ namespace tunnel
ProcessTunnelTest (msgID, timestamp);
}
bool TunnelPool::ProcessTunnelTest (uint32_t msgID, uint64_t timestamp, bool monotonic)
bool TunnelPool::ProcessTunnelTest (uint32_t msgID, uint64_t timestamp)
{
decltype(m_Tests)::mapped_type test;
bool found = false;
@ -487,9 +491,7 @@ namespace tunnel
}
if (found)
{
int64_t ts = monotonic ? i2p::util::GetSteadyMicroseconds () : i2p::util::GetMillisecondsSinceEpoch ();
int dlt = ts - timestamp;
if (!monotonic) dlt *= 1000; // to microseconds
int dlt = (uint64_t)i2p::util::GetSteadyMicroseconds () - (int64_t)timestamp;
LogPrint (eLogDebug, "Tunnels: Test of ", msgID, " successful. ", dlt, " microseconds");
if (dlt < 0) dlt = 0; // should not happen
int numHops = 0;

2
libi2pd/TunnelPool.h
View File

@ -86,7 +86,7 @@ namespace tunnel
void ProcessGarlicMessage (std::shared_ptr<I2NPMessage> msg);
void ProcessDeliveryStatus (std::shared_ptr<I2NPMessage> msg);
void ProcessTunnelTest (std::shared_ptr<I2NPMessage> msg);
bool ProcessTunnelTest (uint32_t msgID, uint64_t timestamp, bool monotonic = true);
bool ProcessTunnelTest (uint32_t msgID, uint64_t timestamp);
bool IsExploratory () const;
bool IsActive () const { return m_IsActive; };