diff --git a/libi2pd/I2NPProtocol.cpp b/libi2pd/I2NPProtocol.cpp index 5c6e6e02..54924451 100644 --- a/libi2pd/I2NPProtocol.cpp +++ b/libi2pd/I2NPProtocol.cpp @@ -709,17 +709,31 @@ namespace i2p } // send reply if (isEndpoint) - { + { auto replyMsg = NewI2NPShortMessage (); replyMsg->Concat (buf, len); replyMsg->FillI2NPMessageHeader (eI2NPShortTunnelBuildReply, bufbe32toh (clearText + SHORT_REQUEST_RECORD_SEND_MSG_ID_OFFSET)); - i2p::crypto::HKDF (noiseState.m_CK, nullptr, 0, "RGarlicKeyAndTag", noiseState.m_CK); - uint64_t tag; - memcpy (&tag, noiseState.m_CK, 8); - // we send it to reply tunnel - transports.SendMessage (clearText + SHORT_REQUEST_RECORD_NEXT_IDENT_OFFSET, - CreateTunnelGatewayMsg (bufbe32toh (clearText + SHORT_REQUEST_RECORD_NEXT_TUNNEL_OFFSET), - i2p::garlic::WrapECIESX25519Message (replyMsg, noiseState.m_CK + 32, tag))); + if (memcmp ((const uint8_t *)i2p::context.GetIdentHash (), + clearText + SHORT_REQUEST_RECORD_NEXT_IDENT_OFFSET, 32)) // reply IBGW is not local? + { + i2p::crypto::HKDF (noiseState.m_CK, nullptr, 0, "RGarlicKeyAndTag", noiseState.m_CK); + uint64_t tag; + memcpy (&tag, noiseState.m_CK, 8); + // we send it to reply tunnel + transports.SendMessage (clearText + SHORT_REQUEST_RECORD_NEXT_IDENT_OFFSET, + CreateTunnelGatewayMsg (bufbe32toh (clearText + SHORT_REQUEST_RECORD_NEXT_TUNNEL_OFFSET), + i2p::garlic::WrapECIESX25519Message (replyMsg, noiseState.m_CK + 32, tag))); + } + else + { + // IBGW is local + uint32_t tunnelID = bufbe32toh (clearText + SHORT_REQUEST_RECORD_NEXT_TUNNEL_OFFSET); + auto tunnel = i2p::tunnel::tunnels.GetTunnel (tunnelID); + if (tunnel) + tunnel->SendTunnelDataMsg (replyMsg); + else + LogPrint (eLogWarning, "I2NP: Tunnel ", tunnelID, " not found for short tunnel build reply"); + } } else transports.SendMessage (clearText + SHORT_REQUEST_RECORD_NEXT_IDENT_OFFSET, diff --git a/libi2pd/Tunnel.cpp b/libi2pd/Tunnel.cpp index d0aaa482..54b24d37 100644 --- a/libi2pd/Tunnel.cpp +++ b/libi2pd/Tunnel.cpp @@ -96,7 +96,7 @@ namespace tunnel if (m_Config->IsShort ()) { auto ident = m_Config->GetFirstHop () ? m_Config->GetFirstHop ()->ident : nullptr; - if (ident) + if (ident && ident->GetIdentHash () != outboundTunnel->GetNextIdentHash ()) // don't encrypt if IBGW = OBEP { auto msg1 = i2p::garlic::WrapECIESX25519MessageForRouter (msg, ident->GetEncryptionPublicKey ()); if (msg1) msg = msg1;