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handshake_test.go
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handshake_test.go
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package self_test
import (
"context"
"crypto/tls"
"errors"
"fmt"
"io"
"net"
"time"
"github.com/lucas-clemente/quic-go"
"github.com/lucas-clemente/quic-go/integrationtests/tools/israce"
"github.com/lucas-clemente/quic-go/internal/protocol"
"github.com/lucas-clemente/quic-go/internal/qerr"
"github.com/lucas-clemente/quic-go/logging"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
type versioner interface {
GetVersion() protocol.VersionNumber
}
type tokenStore struct {
store quic.TokenStore
gets chan<- string
puts chan<- string
}
var _ quic.TokenStore = &tokenStore{}
func newTokenStore(gets, puts chan<- string) quic.TokenStore {
return &tokenStore{
store: quic.NewLRUTokenStore(10, 4),
gets: gets,
puts: puts,
}
}
func (c *tokenStore) Put(key string, token *quic.ClientToken) {
c.puts <- key
c.store.Put(key, token)
}
func (c *tokenStore) Pop(key string) *quic.ClientToken {
c.gets <- key
return c.store.Pop(key)
}
type versionNegotiationTracer struct {
connTracer
loggedVersions bool
receivedVersionNegotiation bool
chosen logging.VersionNumber
clientVersions, serverVersions []logging.VersionNumber
}
func (t *versionNegotiationTracer) NegotiatedVersion(chosen logging.VersionNumber, clientVersions, serverVersions []logging.VersionNumber) {
if t.loggedVersions {
Fail("only expected one call to NegotiatedVersions")
}
t.loggedVersions = true
t.chosen = chosen
t.clientVersions = clientVersions
t.serverVersions = serverVersions
}
func (t *versionNegotiationTracer) ReceivedVersionNegotiationPacket(*logging.Header, []logging.VersionNumber) {
t.receivedVersionNegotiation = true
}
var _ = Describe("Handshake tests", func() {
var (
server quic.Listener
serverConfig *quic.Config
acceptStopped chan struct{}
)
BeforeEach(func() {
server = nil
acceptStopped = make(chan struct{})
serverConfig = getQuicConfig(nil)
})
AfterEach(func() {
if server != nil {
server.Close()
<-acceptStopped
}
})
runServer := func(tlsConf *tls.Config) {
var err error
// start the server
server, err = quic.ListenAddr("localhost:0", tlsConf, serverConfig)
Expect(err).ToNot(HaveOccurred())
go func() {
defer GinkgoRecover()
defer close(acceptStopped)
for {
if _, err := server.Accept(context.Background()); err != nil {
return
}
}
}()
}
if !israce.Enabled {
Context("Version Negotiation", func() {
var supportedVersions []protocol.VersionNumber
BeforeEach(func() {
supportedVersions = protocol.SupportedVersions
protocol.SupportedVersions = append(protocol.SupportedVersions, []protocol.VersionNumber{7, 8, 9, 10}...)
})
AfterEach(func() {
protocol.SupportedVersions = supportedVersions
})
It("when the server supports more versions than the client", func() {
expectedVersion := protocol.SupportedVersions[0]
// the server doesn't support the highest supported version, which is the first one the client will try
// but it supports a bunch of versions that the client doesn't speak
serverConfig.Versions = []protocol.VersionNumber{7, 8, protocol.SupportedVersions[0], 9}
serverTracer := &versionNegotiationTracer{}
serverConfig.Tracer = newTracer(func() logging.ConnectionTracer { return serverTracer })
runServer(getTLSConfig())
defer server.Close()
clientTracer := &versionNegotiationTracer{}
conn, err := quic.DialAddr(
fmt.Sprintf("localhost:%d", server.Addr().(*net.UDPAddr).Port),
getTLSClientConfig(),
getQuicConfig(&quic.Config{Tracer: newTracer(func() logging.ConnectionTracer { return clientTracer })}),
)
Expect(err).ToNot(HaveOccurred())
Expect(conn.(versioner).GetVersion()).To(Equal(expectedVersion))
Expect(conn.CloseWithError(0, "")).To(Succeed())
Expect(clientTracer.chosen).To(Equal(expectedVersion))
Expect(clientTracer.receivedVersionNegotiation).To(BeFalse())
Expect(clientTracer.clientVersions).To(Equal(protocol.SupportedVersions))
Expect(clientTracer.serverVersions).To(BeEmpty())
Expect(serverTracer.chosen).To(Equal(expectedVersion))
Expect(serverTracer.serverVersions).To(Equal(serverConfig.Versions))
Expect(serverTracer.clientVersions).To(BeEmpty())
})
It("when the client supports more versions than the server supports", func() {
expectedVersion := protocol.SupportedVersions[0]
// the server doesn't support the highest supported version, which is the first one the client will try
// but it supports a bunch of versions that the client doesn't speak
serverConfig.Versions = supportedVersions
serverTracer := &versionNegotiationTracer{}
serverConfig.Tracer = newTracer(func() logging.ConnectionTracer { return serverTracer })
runServer(getTLSConfig())
defer server.Close()
clientVersions := []protocol.VersionNumber{7, 8, 9, protocol.SupportedVersions[0], 10}
clientTracer := &versionNegotiationTracer{}
conn, err := quic.DialAddr(
fmt.Sprintf("localhost:%d", server.Addr().(*net.UDPAddr).Port),
getTLSClientConfig(),
getQuicConfig(&quic.Config{
Versions: clientVersions,
Tracer: newTracer(func() logging.ConnectionTracer { return clientTracer }),
}),
)
Expect(err).ToNot(HaveOccurred())
Expect(conn.(versioner).GetVersion()).To(Equal(protocol.SupportedVersions[0]))
Expect(conn.CloseWithError(0, "")).To(Succeed())
Expect(clientTracer.chosen).To(Equal(expectedVersion))
Expect(clientTracer.receivedVersionNegotiation).To(BeTrue())
Expect(clientTracer.clientVersions).To(Equal(clientVersions))
Expect(clientTracer.serverVersions).To(ContainElements(supportedVersions)) // may contain greased versions
Expect(serverTracer.chosen).To(Equal(expectedVersion))
Expect(serverTracer.serverVersions).To(Equal(serverConfig.Versions))
Expect(serverTracer.clientVersions).To(BeEmpty())
})
})
}
Context("using different cipher suites", func() {
for n, id := range map[string]uint16{
"TLS_AES_128_GCM_SHA256": tls.TLS_AES_128_GCM_SHA256,
"TLS_AES_256_GCM_SHA384": tls.TLS_AES_256_GCM_SHA384,
"TLS_CHACHA20_POLY1305_SHA256": tls.TLS_CHACHA20_POLY1305_SHA256,
} {
name := n
suiteID := id
It(fmt.Sprintf("using %s", name), func() {
tlsConf := getTLSConfig()
tlsConf.CipherSuites = []uint16{suiteID}
ln, err := quic.ListenAddr("localhost:0", tlsConf, serverConfig)
Expect(err).ToNot(HaveOccurred())
defer ln.Close()
go func() {
defer GinkgoRecover()
conn, err := ln.Accept(context.Background())
Expect(err).ToNot(HaveOccurred())
str, err := conn.OpenStream()
Expect(err).ToNot(HaveOccurred())
defer str.Close()
_, err = str.Write(PRData)
Expect(err).ToNot(HaveOccurred())
}()
conn, err := quic.DialAddr(
fmt.Sprintf("localhost:%d", ln.Addr().(*net.UDPAddr).Port),
getTLSClientConfig(),
nil,
)
Expect(err).ToNot(HaveOccurred())
str, err := conn.AcceptStream(context.Background())
Expect(err).ToNot(HaveOccurred())
data, err := io.ReadAll(str)
Expect(err).ToNot(HaveOccurred())
Expect(data).To(Equal(PRData))
Expect(conn.ConnectionState().TLS.CipherSuite).To(Equal(suiteID))
Expect(conn.CloseWithError(0, "")).To(Succeed())
})
}
})
Context("Certificate validation", func() {
for _, v := range protocol.SupportedVersions {
version := v
Context(fmt.Sprintf("using %s", version), func() {
var clientConfig *quic.Config
BeforeEach(func() {
serverConfig.Versions = []protocol.VersionNumber{version}
clientConfig = getQuicConfig(&quic.Config{Versions: []protocol.VersionNumber{version}})
})
It("accepts the certificate", func() {
runServer(getTLSConfig())
_, err := quic.DialAddr(
fmt.Sprintf("localhost:%d", server.Addr().(*net.UDPAddr).Port),
getTLSClientConfig(),
clientConfig,
)
Expect(err).ToNot(HaveOccurred())
})
It("works with a long certificate chain", func() {
runServer(getTLSConfigWithLongCertChain())
_, err := quic.DialAddr(
fmt.Sprintf("localhost:%d", server.Addr().(*net.UDPAddr).Port),
getTLSClientConfig(),
getQuicConfig(&quic.Config{Versions: []protocol.VersionNumber{version}}),
)
Expect(err).ToNot(HaveOccurred())
})
It("errors if the server name doesn't match", func() {
runServer(getTLSConfig())
conn, err := net.ListenUDP("udp", nil)
Expect(err).ToNot(HaveOccurred())
_, err = quic.Dial(
conn,
server.Addr(),
"foo.bar",
getTLSClientConfig(),
clientConfig,
)
Expect(err).To(HaveOccurred())
var transportErr *quic.TransportError
Expect(errors.As(err, &transportErr)).To(BeTrue())
Expect(transportErr.ErrorCode.IsCryptoError()).To(BeTrue())
Expect(transportErr.Error()).To(ContainSubstring("x509: certificate is valid for localhost, not foo.bar"))
})
It("fails the handshake if the client fails to provide the requested client cert", func() {
tlsConf := getTLSConfig()
tlsConf.ClientAuth = tls.RequireAndVerifyClientCert
runServer(tlsConf)
conn, err := quic.DialAddr(
fmt.Sprintf("localhost:%d", server.Addr().(*net.UDPAddr).Port),
getTLSClientConfig(),
clientConfig,
)
// Usually, the error will occur after the client already finished the handshake.
// However, there's a race condition here. The server's CONNECTION_CLOSE might be
// received before the connection is returned, so we might already get the error while dialing.
if err == nil {
errChan := make(chan error)
go func() {
defer GinkgoRecover()
_, err := conn.AcceptStream(context.Background())
errChan <- err
}()
Eventually(errChan).Should(Receive(&err))
}
Expect(err).To(HaveOccurred())
var transportErr *quic.TransportError
Expect(errors.As(err, &transportErr)).To(BeTrue())
Expect(transportErr.ErrorCode.IsCryptoError()).To(BeTrue())
Expect(transportErr.Error()).To(ContainSubstring("tls: bad certificate"))
})
It("uses the ServerName in the tls.Config", func() {
runServer(getTLSConfig())
tlsConf := getTLSClientConfig()
tlsConf.ServerName = "foo.bar"
_, err := quic.DialAddr(
fmt.Sprintf("localhost:%d", server.Addr().(*net.UDPAddr).Port),
tlsConf,
clientConfig,
)
Expect(err).To(HaveOccurred())
var transportErr *quic.TransportError
Expect(errors.As(err, &transportErr)).To(BeTrue())
Expect(transportErr.ErrorCode.IsCryptoError()).To(BeTrue())
Expect(transportErr.Error()).To(ContainSubstring("x509: certificate is valid for localhost, not foo.bar"))
})
})
}
})
Context("rate limiting", func() {
var (
server quic.Listener
pconn net.PacketConn
)
dial := func() (quic.Connection, error) {
remoteAddr := fmt.Sprintf("localhost:%d", server.Addr().(*net.UDPAddr).Port)
raddr, err := net.ResolveUDPAddr("udp", remoteAddr)
Expect(err).ToNot(HaveOccurred())
return quic.Dial(
pconn,
raddr,
remoteAddr,
getTLSClientConfig(),
nil,
)
}
BeforeEach(func() {
var err error
// start the server, but don't call Accept
server, err = quic.ListenAddr("localhost:0", getTLSConfig(), serverConfig)
Expect(err).ToNot(HaveOccurred())
// prepare a (single) packet conn for dialing to the server
laddr, err := net.ResolveUDPAddr("udp", "localhost:0")
Expect(err).ToNot(HaveOccurred())
pconn, err = net.ListenUDP("udp", laddr)
Expect(err).ToNot(HaveOccurred())
})
AfterEach(func() {
Expect(server.Close()).To(Succeed())
Expect(pconn.Close()).To(Succeed())
})
It("rejects new connection attempts if connections don't get accepted", func() {
for i := 0; i < protocol.MaxAcceptQueueSize; i++ {
conn, err := dial()
Expect(err).ToNot(HaveOccurred())
defer conn.CloseWithError(0, "")
}
time.Sleep(25 * time.Millisecond) // wait a bit for the connection to be queued
_, err := dial()
Expect(err).To(HaveOccurred())
var transportErr *quic.TransportError
Expect(errors.As(err, &transportErr)).To(BeTrue())
Expect(transportErr.ErrorCode).To(Equal(quic.ConnectionRefused))
// now accept one connection, freeing one spot in the queue
_, err = server.Accept(context.Background())
Expect(err).ToNot(HaveOccurred())
// dial again, and expect that this dial succeeds
conn, err := dial()
Expect(err).ToNot(HaveOccurred())
defer conn.CloseWithError(0, "")
time.Sleep(25 * time.Millisecond) // wait a bit for the connection to be queued
_, err = dial()
Expect(err).To(HaveOccurred())
Expect(errors.As(err, &transportErr)).To(BeTrue())
Expect(transportErr.ErrorCode).To(Equal(quic.ConnectionRefused))
})
It("removes closed connections from the accept queue", func() {
firstConn, err := dial()
Expect(err).ToNot(HaveOccurred())
for i := 1; i < protocol.MaxAcceptQueueSize; i++ {
conn, err := dial()
Expect(err).ToNot(HaveOccurred())
defer conn.CloseWithError(0, "")
}
time.Sleep(scaleDuration(20 * time.Millisecond)) // wait a bit for the connection to be queued
_, err = dial()
Expect(err).To(HaveOccurred())
var transportErr *quic.TransportError
Expect(errors.As(err, &transportErr)).To(BeTrue())
Expect(transportErr.ErrorCode).To(Equal(quic.ConnectionRefused))
// Now close the one of the connection that are waiting to be accepted.
// This should free one spot in the queue.
Expect(firstConn.CloseWithError(0, ""))
Eventually(firstConn.Context().Done()).Should(BeClosed())
time.Sleep(scaleDuration(20 * time.Millisecond))
// dial again, and expect that this dial succeeds
_, err = dial()
Expect(err).ToNot(HaveOccurred())
time.Sleep(scaleDuration(20 * time.Millisecond)) // wait a bit for the connection to be queued
_, err = dial()
Expect(err).To(HaveOccurred())
Expect(errors.As(err, &transportErr)).To(BeTrue())
Expect(transportErr.ErrorCode).To(Equal(quic.ConnectionRefused))
})
})
Context("ALPN", func() {
It("negotiates an application protocol", func() {
ln, err := quic.ListenAddr("localhost:0", getTLSConfig(), serverConfig)
Expect(err).ToNot(HaveOccurred())
done := make(chan struct{})
go func() {
defer GinkgoRecover()
conn, err := ln.Accept(context.Background())
Expect(err).ToNot(HaveOccurred())
cs := conn.ConnectionState()
Expect(cs.TLS.NegotiatedProtocol).To(Equal(alpn))
close(done)
}()
conn, err := quic.DialAddr(
fmt.Sprintf("localhost:%d", ln.Addr().(*net.UDPAddr).Port),
getTLSClientConfig(),
nil,
)
Expect(err).ToNot(HaveOccurred())
defer conn.CloseWithError(0, "")
cs := conn.ConnectionState()
Expect(cs.TLS.NegotiatedProtocol).To(Equal(alpn))
Eventually(done).Should(BeClosed())
Expect(ln.Close()).To(Succeed())
})
It("errors if application protocol negotiation fails", func() {
runServer(getTLSConfig())
tlsConf := getTLSClientConfig()
tlsConf.NextProtos = []string{"foobar"}
_, err := quic.DialAddr(
fmt.Sprintf("localhost:%d", server.Addr().(*net.UDPAddr).Port),
tlsConf,
nil,
)
Expect(err).To(HaveOccurred())
var transportErr *quic.TransportError
Expect(errors.As(err, &transportErr)).To(BeTrue())
Expect(transportErr.ErrorCode.IsCryptoError()).To(BeTrue())
Expect(transportErr.Error()).To(ContainSubstring("no application protocol"))
})
})
Context("using tokens", func() {
It("uses tokens provided in NEW_TOKEN frames", func() {
server, err := quic.ListenAddr("localhost:0", getTLSConfig(), serverConfig)
Expect(err).ToNot(HaveOccurred())
// dial the first connection and receive the token
go func() {
defer GinkgoRecover()
_, err := server.Accept(context.Background())
Expect(err).ToNot(HaveOccurred())
}()
gets := make(chan string, 100)
puts := make(chan string, 100)
tokenStore := newTokenStore(gets, puts)
quicConf := getQuicConfig(&quic.Config{TokenStore: tokenStore})
conn, err := quic.DialAddr(
fmt.Sprintf("localhost:%d", server.Addr().(*net.UDPAddr).Port),
getTLSClientConfig(),
quicConf,
)
Expect(err).ToNot(HaveOccurred())
Expect(gets).To(Receive())
Eventually(puts).Should(Receive())
// received a token. Close this connection.
Expect(conn.CloseWithError(0, "")).To(Succeed())
// dial the second connection and verify that the token was used
done := make(chan struct{})
go func() {
defer GinkgoRecover()
defer close(done)
_, err := server.Accept(context.Background())
Expect(err).ToNot(HaveOccurred())
}()
conn, err = quic.DialAddr(
fmt.Sprintf("localhost:%d", server.Addr().(*net.UDPAddr).Port),
getTLSClientConfig(),
quicConf,
)
Expect(err).ToNot(HaveOccurred())
defer conn.CloseWithError(0, "")
Expect(gets).To(Receive())
Eventually(done).Should(BeClosed())
})
It("rejects invalid Retry token with the INVALID_TOKEN error", func() {
serverConfig.RequireAddressValidation = func(net.Addr) bool { return true }
serverConfig.MaxRetryTokenAge = time.Nanosecond
server, err := quic.ListenAddr("localhost:0", getTLSConfig(), serverConfig)
Expect(err).ToNot(HaveOccurred())
defer server.Close()
_, err = quic.DialAddr(
fmt.Sprintf("localhost:%d", server.Addr().(*net.UDPAddr).Port),
getTLSClientConfig(),
nil,
)
Expect(err).To(HaveOccurred())
var transportErr *quic.TransportError
Expect(errors.As(err, &transportErr)).To(BeTrue())
Expect(transportErr.ErrorCode).To(Equal(quic.InvalidToken))
})
})
It("doesn't send any packets when generating the ClientHello fails", func() {
ln, err := net.ListenUDP("udp", nil)
Expect(err).ToNot(HaveOccurred())
done := make(chan struct{})
packetChan := make(chan struct{})
go func() {
defer GinkgoRecover()
defer close(done)
for {
_, _, err := ln.ReadFromUDP(make([]byte, protocol.MaxPacketBufferSize))
if err != nil {
return
}
packetChan <- struct{}{}
}
}()
tlsConf := getTLSClientConfig()
tlsConf.NextProtos = []string{""}
_, err = quic.DialAddr(
fmt.Sprintf("localhost:%d", ln.LocalAddr().(*net.UDPAddr).Port),
tlsConf,
nil,
)
Expect(err).To(MatchError(&qerr.TransportError{
ErrorCode: qerr.InternalError,
ErrorMessage: "tls: invalid NextProtos value",
}))
Consistently(packetChan).ShouldNot(Receive())
ln.Close()
Eventually(done).Should(BeClosed())
})
})