test(quic): in-memory QUIC pipe (quiche-style) for full-stack handshake
Adds InMemoryQuicPipe — a quiche-Pipe-style harness that runs a real QuicConnection through the full handshake without touching the network. The "server" side wraps InProcessTlsServer in QUIC packet protection (Initial + Handshake long-header packets) and routes CRYPTO bytes between the layers. Direct port of the pattern from quiche/src/test_utils.rs (`Pipe`). InMemoryQuicPipeTest.client_connection_reaches_connected_via_in_memory_pipe verifies the full client receive path: - ClientHello at Initial level → server decrypts, drives TLS, replies - Server Initial packet (ServerHello) → client decrypts, derives handshake keys - Server Handshake packets (EE + Finished) → client verifies, derives 1-RTT keys - Client Finished at Handshake level → server verifies - Client status flips to CONNECTED, both directions of 1-RTT keys installed This is the test category three of the four mature QUIC implementations surveyed have or rely on: - quiche's `Pipe` is the gold standard (we ported it here) - quic-interop-runner is the network-level equivalent (Docker matrix) - kwik notably does NOT have one — uses Mockito + reflection instead It catches the largest class of bugs: wrong layer-to-layer wiring (e.g. TLS layer derives keys but QUIC layer doesn't install them, the hardcoded-cipher-suite C1 bug, AckTracker PN bug C2 across coalesced packets). Future tests can build on it: stream send/receive, datagram round-trip, flow-control stall, retransmission once we add it. Pipe currently supports AES-128-GCM only; ChaCha20 path validation is covered by TlsRoundTripTest at the TLS layer for now. https://claude.ai/code/session_01EC1tfXfap8k8GyKvrxkxZx
This commit is contained in:
Claude
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/*
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* Copyright (c) 2025 Vitor Pamplona
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
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* Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package com.vitorpamplona.quic.connection
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import com.vitorpamplona.quic.crypto.Aes128Gcm
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import com.vitorpamplona.quic.crypto.AesEcbHeaderProtection
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import com.vitorpamplona.quic.crypto.InitialSecrets
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import com.vitorpamplona.quic.crypto.PlatformAesOneBlock
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import com.vitorpamplona.quic.frame.AckFrame
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import com.vitorpamplona.quic.frame.ConnectionCloseFrame
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import com.vitorpamplona.quic.frame.CryptoFrame
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import com.vitorpamplona.quic.frame.DatagramFrame
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import com.vitorpamplona.quic.frame.HandshakeDoneFrame
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import com.vitorpamplona.quic.frame.MaxDataFrame
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import com.vitorpamplona.quic.frame.MaxStreamDataFrame
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import com.vitorpamplona.quic.frame.PingFrame
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import com.vitorpamplona.quic.frame.StreamFrame
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import com.vitorpamplona.quic.frame.decodeFrames
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import com.vitorpamplona.quic.frame.encodeFrames
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import com.vitorpamplona.quic.packet.LongHeaderPacket
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import com.vitorpamplona.quic.packet.LongHeaderPlaintextPacket
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import com.vitorpamplona.quic.packet.LongHeaderType
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import com.vitorpamplona.quic.packet.QuicVersion
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import com.vitorpamplona.quic.packet.ShortHeaderPacket
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import com.vitorpamplona.quic.tls.InProcessTlsServer
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import com.vitorpamplona.quic.tls.TlsConstants
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/**
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* In-memory client ↔ server QUIC connection bridge, following Cloudflare
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* quiche's `Pipe` pattern (`quiche/src/test_utils.rs`). The "server" here
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* is a minimal harness that wraps [InProcessTlsServer] in QUIC packet
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* protection and frame routing — it's enough to exercise the client's
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* full receive path without writing a complete server-side
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* [QuicConnection].
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*
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* Use [drive] to run the handshake until both sides have application
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* keys, then send + receive arbitrary frames via [clientToServer] and
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* [serverToClient].
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*/
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class InMemoryQuicPipe(
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val client: QuicConnection,
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val initialDcid: ByteArray,
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) {
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private val tlsServer = InProcessTlsServer()
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private val initial = InitialSecrets.derive(initialDcid)
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private val hp = AesEcbHeaderProtection(PlatformAesOneBlock)
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// Server's per-direction packet protection at each level.
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private var serverHandshakeRx: PacketProtection? = null
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private var serverHandshakeTx: PacketProtection? = null
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private var serverApplicationRx: PacketProtection? = null
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private var serverApplicationTx: PacketProtection? = null
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private val serverScid = ConnectionId.random(8)
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private val initialPnSpace = PacketNumberSpaceState()
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private val handshakePnSpace = PacketNumberSpaceState()
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private val applicationPnSpace = PacketNumberSpaceState()
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/**
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* Run the handshake to completion. Returns when both sides have
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* 1-RTT keys installed (the client status is CONNECTED).
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*/
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fun drive(maxRounds: Int = 10) {
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repeat(maxRounds) {
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// Client → server.
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val outClient = drainOutbound(client, nowMillis = 0L) ?: return@repeat
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// The client may emit Initial+Handshake coalesced; demux them.
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processClientDatagram(outClient)
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if (client.status == QuicConnection.Status.CONNECTED) return
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// Server → client.
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val outServer = drainServer() ?: return@repeat
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feedDatagram(client, outServer, nowMillis = 0L)
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if (client.status == QuicConnection.Status.CONNECTED) return
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}
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}
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/**
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* Inject a single datagram from the client to the server, processing all
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* coalesced packets.
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*/
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private fun processClientDatagram(datagram: ByteArray) {
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var offset = 0
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while (offset < datagram.size) {
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val first = datagram[offset].toInt() and 0xFF
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if ((first and 0x80) == 0) {
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// Short header — application level. Decrypt and route to the
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// server-side TLS server only if it carries CRYPTO frames
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// (post-handshake messages we ignore).
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val proto = serverApplicationRx ?: return
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val parsed =
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ShortHeaderPacket.parseAndDecrypt(
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bytes = datagram,
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offset = offset,
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dcidLen = serverScid.length,
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aead = proto.aead,
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key = proto.key,
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iv = proto.iv,
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hp = proto.hp,
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hpKey = proto.hpKey,
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largestReceivedInSpace = applicationPnSpace.largestReceived,
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) ?: return
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applicationPnSpace.observeInbound(parsed.packet.packetNumber, 0L)
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processServerInbound(parsed.packet.payload)
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return
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}
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val peeked = LongHeaderPacket.peekHeader(datagram, offset) ?: return
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val proto =
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when (peeked.type) {
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LongHeaderType.INITIAL -> PacketProtection(Aes128Gcm, initial.clientKey, initial.clientIv, hp, initial.clientHp)
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LongHeaderType.HANDSHAKE -> serverHandshakeRx ?: return
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else -> return
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}
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val space =
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when (peeked.type) {
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LongHeaderType.INITIAL -> initialPnSpace
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LongHeaderType.HANDSHAKE -> handshakePnSpace
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else -> return
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}
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val parsed =
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LongHeaderPacket.parseAndDecrypt(
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bytes = datagram,
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offset = offset,
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aead = proto.aead,
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key = proto.key,
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iv = proto.iv,
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hp = proto.hp,
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hpKey = proto.hpKey,
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largestReceivedInSpace = space.largestReceived,
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) ?: return
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space.observeInbound(parsed.packet.packetNumber, 0L)
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processServerInbound(parsed.packet.payload)
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offset += parsed.consumed
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}
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}
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private fun processServerInbound(payload: ByteArray) {
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val frames = decodeFrames(payload)
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val cryptoBytes = ArrayList<ByteArray>()
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for (frame in frames) {
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when (frame) {
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is CryptoFrame -> cryptoBytes += frame.data
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is AckFrame, is PingFrame, is StreamFrame, is DatagramFrame,
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is MaxDataFrame, is MaxStreamDataFrame, is HandshakeDoneFrame,
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is ConnectionCloseFrame,
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-> Unit
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else -> Unit
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}
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}
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if (cryptoBytes.isEmpty()) return
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val joined =
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ByteArray(cryptoBytes.sumOf { it.size }).also { dst ->
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var p = 0
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for (b in cryptoBytes) {
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b.copyInto(dst, p)
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p += b.size
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}
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}
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// Heuristic: route to the right TLS-server entry by inspecting the
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// first byte of the joined CRYPTO bytes (TLS handshake type).
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if (joined.isEmpty()) return
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when (joined[0].toInt() and 0xFF) {
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TlsConstants.HS_CLIENT_HELLO -> {
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tlsServer.receiveClientHello(joined)
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installServerSecretsAfterHandshakeBegin()
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}
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TlsConstants.HS_FINISHED -> {
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tlsServer.receiveClientFinished(joined)
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}
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}
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}
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private fun installServerSecretsAfterHandshakeBegin() {
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// Build the server's handshake / app protection.
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val cipher = tlsServer.negotiatedCipherSuite
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check(cipher == TlsConstants.CIPHER_TLS_AES_128_GCM_SHA256) {
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"InMemoryQuicPipe currently only supports AES-128-GCM"
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}
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serverHandshakeRx = packetProtectionFromSecret(cipher, tlsServer.clientHandshakeSecret!!)
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serverHandshakeTx = packetProtectionFromSecret(cipher, tlsServer.serverHandshakeSecret!!)
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serverApplicationRx = packetProtectionFromSecret(cipher, tlsServer.clientApplicationSecret!!)
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serverApplicationTx = packetProtectionFromSecret(cipher, tlsServer.serverApplicationSecret!!)
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}
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/** Build a single datagram from the server containing whatever it owes the client. */
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private fun drainServer(): ByteArray? {
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val parts = mutableListOf<ByteArray>()
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// Initial-level: ServerHello.
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val initialSh = tlsServer.pollOutboundInitial()
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if (initialSh != null) {
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parts += buildServerInitialPacket(initialSh)
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}
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// Handshake-level: EE then server Finished.
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while (true) {
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val hs = tlsServer.pollOutboundHandshake() ?: break
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val proto = serverHandshakeTx ?: continue
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val pn = handshakePnSpace.allocateOutbound()
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val payload = encodeFrames(listOf(CryptoFrame(handshakeCryptoOffset.also { handshakeCryptoOffset += hs.size.toLong() }, hs)))
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parts +=
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LongHeaderPacket.build(
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LongHeaderPlaintextPacket(
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type = LongHeaderType.HANDSHAKE,
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version = QuicVersion.V1,
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dcid = client.sourceConnectionId,
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scid = serverScid,
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packetNumber = pn,
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payload = payload,
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),
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proto.aead,
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proto.key,
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proto.iv,
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proto.hp,
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proto.hpKey,
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largestAckedInSpace = -1L,
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)
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}
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if (parts.isEmpty()) return null
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var total = 0
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for (p in parts) total += p.size
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val out = ByteArray(total)
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var pos = 0
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for (p in parts) {
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p.copyInto(out, pos)
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pos += p.size
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}
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return out
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}
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private var initialCryptoOffset: Long = 0L
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private var handshakeCryptoOffset: Long = 0L
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private fun buildServerInitialPacket(crypto: ByteArray): ByteArray {
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val proto =
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PacketProtection(
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aead = Aes128Gcm,
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key = initial.serverKey,
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iv = initial.serverIv,
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hp = hp,
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hpKey = initial.serverHp,
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)
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val pn = initialPnSpace.allocateOutbound()
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val frames =
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mutableListOf<com.vitorpamplona.quic.frame.Frame>(
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CryptoFrame(initialCryptoOffset, crypto),
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)
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initialCryptoOffset += crypto.size.toLong()
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// Also ACK the client's Initial PN 0 if we've seen it.
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if (initialPnSpace.largestReceived >= 0L) {
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frames.add(
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0,
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AckFrame(
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largestAcknowledged = initialPnSpace.largestReceived,
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ackDelay = 0L,
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firstAckRange = 0L,
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),
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)
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}
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val payload = encodeFrames(frames)
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return LongHeaderPacket.build(
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LongHeaderPlaintextPacket(
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type = LongHeaderType.INITIAL,
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version = QuicVersion.V1,
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dcid = client.sourceConnectionId,
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scid = serverScid,
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packetNumber = pn,
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payload = payload,
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),
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proto.aead,
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proto.key,
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proto.iv,
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proto.hp,
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proto.hpKey,
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largestAckedInSpace = -1L,
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)
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}
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}
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@@ -0,0 +1,65 @@
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/*
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* Copyright (c) 2025 Vitor Pamplona
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
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* Software, and to permit persons to whom the Software is furnished to do so,
|
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* subject to the following conditions:
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||||
*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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||||
*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package com.vitorpamplona.quic.connection
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import kotlin.test.Test
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import kotlin.test.assertEquals
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import kotlin.test.assertNotNull
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import kotlin.test.assertTrue
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/**
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* Smoke test for the in-memory client+server QUIC pipe, modeled on
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* Cloudflare quiche's `Pipe` pattern. Drives a real [QuicConnection]
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* through the full handshake (Initial → Handshake → 1-RTT) without
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* touching the network, then verifies the connection reaches
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* [QuicConnection.Status.CONNECTED] and that application keys are
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* installed in both directions.
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*
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* This complements [com.vitorpamplona.quic.tls.TlsRoundTripTest] (which
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* exercises only the TLS layer) by routing all CRYPTO bytes through the
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* full QUIC packet protection path.
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*/
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class InMemoryQuicPipeTest {
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@Test
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fun client_connection_reaches_connected_via_in_memory_pipe() {
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val client =
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QuicConnection(
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serverName = "example.test",
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config = QuicConnectionConfig(),
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tlsCertificateValidator = null,
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)
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val pipe = InMemoryQuicPipe(client = client, initialDcid = client.destinationConnectionId.bytes)
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// The connection auto-installs Initial keys on construction; start the
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// handshake by emitting the ClientHello and driving the pipe.
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client.start()
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pipe.drive(maxRounds = 16)
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assertEquals(
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QuicConnection.Status.CONNECTED,
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client.status,
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"client should reach CONNECTED after pipe handshake",
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)
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assertTrue(client.handshakeComplete, "handshakeComplete must be flipped")
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assertNotNull(client.application.sendProtection, "1-RTT send keys must be installed")
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assertNotNull(client.application.receiveProtection, "1-RTT receive keys must be installed")
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}
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}
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