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Mini Shell
Mini Shell
// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package tls
import (
"bytes"
"context"
"crypto"
"crypto/x509"
"encoding/json"
"errors"
"fmt"
"internal/testenv"
"io"
"math"
"net"
"os"
"reflect"
"sort"
"strings"
"testing"
"time"
)
var rsaCertPEM = `-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
`
var rsaKeyPEM = testingKey(`-----BEGIN RSA TESTING KEY-----
MIIBOwIBAAJBANLJhPHhITqQbPklG3ibCVxwGMRfp/v4XqhfdQHdcVfHap6NQ5Wo
k/4xIA+ui35/MmNartNuC+BdZ1tMuVCPFZcCAwEAAQJAEJ2N+zsR0Xn8/Q6twa4G
6OB1M1WO+k+ztnX/1SvNeWu8D6GImtupLTYgjZcHufykj09jiHmjHx8u8ZZB/o1N
MQIhAPW+eyZo7ay3lMz1V01WVjNKK9QSn1MJlb06h/LuYv9FAiEA25WPedKgVyCW
SmUwbPw8fnTcpqDWE3yTO3vKcebqMSsCIBF3UmVue8YU3jybC3NxuXq3wNm34R8T
xVLHwDXh/6NJAiEAl2oHGGLz64BuAfjKrqwz7qMYr9HCLIe/YsoWq/olzScCIQDi
D2lWusoe2/nEqfDVVWGWlyJ7yOmqaVm/iNUN9B2N2g==
-----END RSA TESTING KEY-----
`)
// keyPEM is the same as rsaKeyPEM, but declares itself as just
// "PRIVATE KEY", not "RSA PRIVATE KEY". https://golang.org/issue/4477
var keyPEM = testingKey(`-----BEGIN TESTING KEY-----
MIIBOwIBAAJBANLJhPHhITqQbPklG3ibCVxwGMRfp/v4XqhfdQHdcVfHap6NQ5Wo
k/4xIA+ui35/MmNartNuC+BdZ1tMuVCPFZcCAwEAAQJAEJ2N+zsR0Xn8/Q6twa4G
6OB1M1WO+k+ztnX/1SvNeWu8D6GImtupLTYgjZcHufykj09jiHmjHx8u8ZZB/o1N
MQIhAPW+eyZo7ay3lMz1V01WVjNKK9QSn1MJlb06h/LuYv9FAiEA25WPedKgVyCW
SmUwbPw8fnTcpqDWE3yTO3vKcebqMSsCIBF3UmVue8YU3jybC3NxuXq3wNm34R8T
xVLHwDXh/6NJAiEAl2oHGGLz64BuAfjKrqwz7qMYr9HCLIe/YsoWq/olzScCIQDi
D2lWusoe2/nEqfDVVWGWlyJ7yOmqaVm/iNUN9B2N2g==
-----END TESTING KEY-----
`)
var ecdsaCertPEM = `-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----
`
var ecdsaKeyPEM = testingKey(`-----BEGIN EC PARAMETERS-----
BgUrgQQAIw==
-----END EC PARAMETERS-----
-----BEGIN EC TESTING KEY-----
MIHcAgEBBEIBrsoKp0oqcv6/JovJJDoDVSGWdirrkgCWxrprGlzB9o0X8fV675X0
NwuBenXFfeZvVcwluO7/Q9wkYoPd/t3jGImgBwYFK4EEACOhgYkDgYYABAFj36bL
06h5JRGUNB1X/Hwuw64uKW2GGJLVPPhoYMcg/ALWaW+d/t+DmV5xikwKssuFq4Bz
VQldyCXTXGgu7OC0AQCC/Y/+ODK3NFKlRi+AsG3VQDSV4tgHLqZBBus0S6pPcg1q
kohxS/xfFg/TEwRSSws+roJr4JFKpO2t3/be5OdqmQ==
-----END EC TESTING KEY-----
`)
var keyPairTests = []struct {
algo string
cert string
key string
}{
{"ECDSA", ecdsaCertPEM, ecdsaKeyPEM},
{"RSA", rsaCertPEM, rsaKeyPEM},
{"RSA-untyped", rsaCertPEM, keyPEM}, // golang.org/issue/4477
}
func TestX509KeyPair(t *testing.T) {
t.Parallel()
var pem []byte
for _, test := range keyPairTests {
pem = []byte(test.cert + test.key)
if _, err := X509KeyPair(pem, pem); err != nil {
t.Errorf("Failed to load %s cert followed by %s key: %s", test.algo, test.algo, err)
}
pem = []byte(test.key + test.cert)
if _, err := X509KeyPair(pem, pem); err != nil {
t.Errorf("Failed to load %s key followed by %s cert: %s", test.algo, test.algo, err)
}
}
}
func TestX509KeyPairErrors(t *testing.T) {
_, err := X509KeyPair([]byte(rsaKeyPEM), []byte(rsaCertPEM))
if err == nil {
t.Fatalf("X509KeyPair didn't return an error when arguments were switched")
}
if subStr := "been switched"; !strings.Contains(err.Error(), subStr) {
t.Fatalf("Expected %q in the error when switching arguments to X509KeyPair, but the error was %q", subStr, err)
}
_, err = X509KeyPair([]byte(rsaCertPEM), []byte(rsaCertPEM))
if err == nil {
t.Fatalf("X509KeyPair didn't return an error when both arguments were certificates")
}
if subStr := "certificate"; !strings.Contains(err.Error(), subStr) {
t.Fatalf("Expected %q in the error when both arguments to X509KeyPair were certificates, but the error was %q", subStr, err)
}
const nonsensePEM = `
-----BEGIN NONSENSE-----
Zm9vZm9vZm9v
-----END NONSENSE-----
`
_, err = X509KeyPair([]byte(nonsensePEM), []byte(nonsensePEM))
if err == nil {
t.Fatalf("X509KeyPair didn't return an error when both arguments were nonsense")
}
if subStr := "NONSENSE"; !strings.Contains(err.Error(), subStr) {
t.Fatalf("Expected %q in the error when both arguments to X509KeyPair were nonsense, but the error was %q", subStr, err)
}
}
func TestX509MixedKeyPair(t *testing.T) {
if _, err := X509KeyPair([]byte(rsaCertPEM), []byte(ecdsaKeyPEM)); err == nil {
t.Error("Load of RSA certificate succeeded with ECDSA private key")
}
if _, err := X509KeyPair([]byte(ecdsaCertPEM), []byte(rsaKeyPEM)); err == nil {
t.Error("Load of ECDSA certificate succeeded with RSA private key")
}
}
func newLocalListener(t testing.TB) net.Listener {
ln, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
ln, err = net.Listen("tcp6", "[::1]:0")
}
if err != nil {
t.Fatal(err)
}
return ln
}
func TestDialTimeout(t *testing.T) {
if testing.Short() {
t.Skip("skipping in short mode")
}
listener := newLocalListener(t)
addr := listener.Addr().String()
defer listener.Close()
complete := make(chan bool)
defer close(complete)
go func() {
conn, err := listener.Accept()
if err != nil {
t.Error(err)
return
}
<-complete
conn.Close()
}()
dialer := &net.Dialer{
Timeout: 10 * time.Millisecond,
}
var err error
if _, err = DialWithDialer(dialer, "tcp", addr, nil); err == nil {
t.Fatal("DialWithTimeout completed successfully")
}
if !isTimeoutError(err) {
t.Errorf("resulting error not a timeout: %v\nType %T: %#v", err, err, err)
}
}
func TestDeadlineOnWrite(t *testing.T) {
if testing.Short() {
t.Skip("skipping in short mode")
}
ln := newLocalListener(t)
defer ln.Close()
srvCh := make(chan *Conn, 1)
go func() {
sconn, err := ln.Accept()
if err != nil {
srvCh <- nil
return
}
srv := Server(sconn, testConfig.Clone())
if err := srv.Handshake(); err != nil {
srvCh <- nil
return
}
srvCh <- srv
}()
clientConfig := testConfig.Clone()
clientConfig.MaxVersion = VersionTLS12
conn, err := Dial("tcp", ln.Addr().String(), clientConfig)
if err != nil {
t.Fatal(err)
}
defer conn.Close()
srv := <-srvCh
if srv == nil {
t.Error(err)
}
// Make sure the client/server is setup correctly and is able to do a typical Write/Read
buf := make([]byte, 6)
if _, err := srv.Write([]byte("foobar")); err != nil {
t.Errorf("Write err: %v", err)
}
if n, err := conn.Read(buf); n != 6 || err != nil || string(buf) != "foobar" {
t.Errorf("Read = %d, %v, data %q; want 6, nil, foobar", n, err, buf)
}
// Set a deadline which should cause Write to timeout
if err = srv.SetDeadline(time.Now()); err != nil {
t.Fatalf("SetDeadline(time.Now()) err: %v", err)
}
if _, err = srv.Write([]byte("should fail")); err == nil {
t.Fatal("Write should have timed out")
}
// Clear deadline and make sure it still times out
if err = srv.SetDeadline(time.Time{}); err != nil {
t.Fatalf("SetDeadline(time.Time{}) err: %v", err)
}
if _, err = srv.Write([]byte("This connection is permanently broken")); err == nil {
t.Fatal("Write which previously failed should still time out")
}
// Verify the error
if ne := err.(net.Error); ne.Temporary() != false {
t.Error("Write timed out but incorrectly classified the error as Temporary")
}
if !isTimeoutError(err) {
t.Error("Write timed out but did not classify the error as a Timeout")
}
}
type readerFunc func([]byte) (int, error)
func (f readerFunc) Read(b []byte) (int, error) { return f(b) }
// TestDialer tests that tls.Dialer.DialContext can abort in the middle of a handshake.
// (The other cases are all handled by the existing dial tests in this package, which
// all also flow through the same code shared code paths)
func TestDialer(t *testing.T) {
ln := newLocalListener(t)
defer ln.Close()
unblockServer := make(chan struct{}) // close-only
defer close(unblockServer)
go func() {
conn, err := ln.Accept()
if err != nil {
return
}
defer conn.Close()
<-unblockServer
}()
ctx, cancel := context.WithCancel(context.Background())
d := Dialer{Config: &Config{
Rand: readerFunc(func(b []byte) (n int, err error) {
// By the time crypto/tls wants randomness, that means it has a TCP
// connection, so we're past the Dialer's dial and now blocked
// in a handshake. Cancel our context and see if we get unstuck.
// (Our TCP listener above never reads or writes, so the Handshake
// would otherwise be stuck forever)
cancel()
return len(b), nil
}),
ServerName: "foo",
}}
_, err := d.DialContext(ctx, "tcp", ln.Addr().String())
if err != context.Canceled {
t.Errorf("err = %v; want context.Canceled", err)
}
}
func isTimeoutError(err error) bool {
if ne, ok := err.(net.Error); ok {
return ne.Timeout()
}
return false
}
// tests that Conn.Read returns (non-zero, io.EOF) instead of
// (non-zero, nil) when a Close (alertCloseNotify) is sitting right
// behind the application data in the buffer.
func TestConnReadNonzeroAndEOF(t *testing.T) {
// This test is racy: it assumes that after a write to a
// localhost TCP connection, the peer TCP connection can
// immediately read it. Because it's racy, we skip this test
// in short mode, and then retry it several times with an
// increasing sleep in between our final write (via srv.Close
// below) and the following read.
if testing.Short() {
t.Skip("skipping in short mode")
}
var err error
for delay := time.Millisecond; delay <= 64*time.Millisecond; delay *= 2 {
if err = testConnReadNonzeroAndEOF(t, delay); err == nil {
return
}
}
t.Error(err)
}
func testConnReadNonzeroAndEOF(t *testing.T, delay time.Duration) error {
ln := newLocalListener(t)
defer ln.Close()
srvCh := make(chan *Conn, 1)
var serr error
go func() {
sconn, err := ln.Accept()
if err != nil {
serr = err
srvCh <- nil
return
}
serverConfig := testConfig.Clone()
srv := Server(sconn, serverConfig)
if err := srv.Handshake(); err != nil {
serr = fmt.Errorf("handshake: %v", err)
srvCh <- nil
return
}
srvCh <- srv
}()
clientConfig := testConfig.Clone()
// In TLS 1.3, alerts are encrypted and disguised as application data, so
// the opportunistic peek won't work.
clientConfig.MaxVersion = VersionTLS12
conn, err := Dial("tcp", ln.Addr().String(), clientConfig)
if err != nil {
t.Fatal(err)
}
defer conn.Close()
srv := <-srvCh
if srv == nil {
return serr
}
buf := make([]byte, 6)
srv.Write([]byte("foobar"))
n, err := conn.Read(buf)
if n != 6 || err != nil || string(buf) != "foobar" {
return fmt.Errorf("Read = %d, %v, data %q; want 6, nil, foobar", n, err, buf)
}
srv.Write([]byte("abcdef"))
srv.Close()
time.Sleep(delay)
n, err = conn.Read(buf)
if n != 6 || string(buf) != "abcdef" {
return fmt.Errorf("Read = %d, buf= %q; want 6, abcdef", n, buf)
}
if err != io.EOF {
return fmt.Errorf("Second Read error = %v; want io.EOF", err)
}
return nil
}
func TestTLSUniqueMatches(t *testing.T) {
ln := newLocalListener(t)
defer ln.Close()
serverTLSUniques := make(chan []byte)
parentDone := make(chan struct{})
childDone := make(chan struct{})
defer close(parentDone)
go func() {
defer close(childDone)
for i := 0; i < 2; i++ {
sconn, err := ln.Accept()
if err != nil {
t.Error(err)
return
}
serverConfig := testConfig.Clone()
serverConfig.MaxVersion = VersionTLS12 // TLSUnique is not defined in TLS 1.3
srv := Server(sconn, serverConfig)
if err := srv.Handshake(); err != nil {
t.Error(err)
return
}
select {
case <-parentDone:
return
case serverTLSUniques <- srv.ConnectionState().TLSUnique:
}
}
}()
clientConfig := testConfig.Clone()
clientConfig.ClientSessionCache = NewLRUClientSessionCache(1)
conn, err := Dial("tcp", ln.Addr().String(), clientConfig)
if err != nil {
t.Fatal(err)
}
var serverTLSUniquesValue []byte
select {
case <-childDone:
return
case serverTLSUniquesValue = <-serverTLSUniques:
}
if !bytes.Equal(conn.ConnectionState().TLSUnique, serverTLSUniquesValue) {
t.Error("client and server channel bindings differ")
}
conn.Close()
conn, err = Dial("tcp", ln.Addr().String(), clientConfig)
if err != nil {
t.Fatal(err)
}
defer conn.Close()
if !conn.ConnectionState().DidResume {
t.Error("second session did not use resumption")
}
select {
case <-childDone:
return
case serverTLSUniquesValue = <-serverTLSUniques:
}
if !bytes.Equal(conn.ConnectionState().TLSUnique, serverTLSUniquesValue) {
t.Error("client and server channel bindings differ when session resumption is used")
}
}
func TestVerifyHostname(t *testing.T) {
testenv.MustHaveExternalNetwork(t)
c, err := Dial("tcp", "www.google.com:https", nil)
if err != nil {
t.Fatal(err)
}
if err := c.VerifyHostname("www.google.com"); err != nil {
t.Fatalf("verify www.google.com: %v", err)
}
if err := c.VerifyHostname("www.yahoo.com"); err == nil {
t.Fatalf("verify www.yahoo.com succeeded")
}
c, err = Dial("tcp", "www.google.com:https", &Config{InsecureSkipVerify: true})
if err != nil {
t.Fatal(err)
}
if err := c.VerifyHostname("www.google.com"); err == nil {
t.Fatalf("verify www.google.com succeeded with InsecureSkipVerify=true")
}
}
func TestConnCloseBreakingWrite(t *testing.T) {
ln := newLocalListener(t)
defer ln.Close()
srvCh := make(chan *Conn, 1)
var serr error
var sconn net.Conn
go func() {
var err error
sconn, err = ln.Accept()
if err != nil {
serr = err
srvCh <- nil
return
}
serverConfig := testConfig.Clone()
srv := Server(sconn, serverConfig)
if err := srv.Handshake(); err != nil {
serr = fmt.Errorf("handshake: %v", err)
srvCh <- nil
return
}
srvCh <- srv
}()
cconn, err := net.Dial("tcp", ln.Addr().String())
if err != nil {
t.Fatal(err)
}
defer cconn.Close()
conn := &changeImplConn{
Conn: cconn,
}
clientConfig := testConfig.Clone()
tconn := Client(conn, clientConfig)
if err := tconn.Handshake(); err != nil {
t.Fatal(err)
}
srv := <-srvCh
if srv == nil {
t.Fatal(serr)
}
defer sconn.Close()
connClosed := make(chan struct{})
conn.closeFunc = func() error {
close(connClosed)
return nil
}
inWrite := make(chan bool, 1)
var errConnClosed = errors.New("conn closed for test")
conn.writeFunc = func(p []byte) (n int, err error) {
inWrite <- true
<-connClosed
return 0, errConnClosed
}
closeReturned := make(chan bool, 1)
go func() {
<-inWrite
tconn.Close() // test that this doesn't block forever.
closeReturned <- true
}()
_, err = tconn.Write([]byte("foo"))
if err != errConnClosed {
t.Errorf("Write error = %v; want errConnClosed", err)
}
<-closeReturned
if err := tconn.Close(); err != net.ErrClosed {
t.Errorf("Close error = %v; want net.ErrClosed", err)
}
}
func TestConnCloseWrite(t *testing.T) {
ln := newLocalListener(t)
defer ln.Close()
clientDoneChan := make(chan struct{})
serverCloseWrite := func() error {
sconn, err := ln.Accept()
if err != nil {
return fmt.Errorf("accept: %v", err)
}
defer sconn.Close()
serverConfig := testConfig.Clone()
srv := Server(sconn, serverConfig)
if err := srv.Handshake(); err != nil {
return fmt.Errorf("handshake: %v", err)
}
defer srv.Close()
data, err := io.ReadAll(srv)
if err != nil {
return err
}
if len(data) > 0 {
return fmt.Errorf("Read data = %q; want nothing", data)
}
if err := srv.CloseWrite(); err != nil {
return fmt.Errorf("server CloseWrite: %v", err)
}
// Wait for clientCloseWrite to finish, so we know we
// tested the CloseWrite before we defer the
// sconn.Close above, which would also cause the
// client to unblock like CloseWrite.
<-clientDoneChan
return nil
}
clientCloseWrite := func() error {
defer close(clientDoneChan)
clientConfig := testConfig.Clone()
conn, err := Dial("tcp", ln.Addr().String(), clientConfig)
if err != nil {
return err
}
if err := conn.Handshake(); err != nil {
return err
}
defer conn.Close()
if err := conn.CloseWrite(); err != nil {
return fmt.Errorf("client CloseWrite: %v", err)
}
if _, err := conn.Write([]byte{0}); err != errShutdown {
return fmt.Errorf("CloseWrite error = %v; want errShutdown", err)
}
data, err := io.ReadAll(conn)
if err != nil {
return err
}
if len(data) > 0 {
return fmt.Errorf("Read data = %q; want nothing", data)
}
return nil
}
errChan := make(chan error, 2)
go func() { errChan <- serverCloseWrite() }()
go func() { errChan <- clientCloseWrite() }()
for i := 0; i < 2; i++ {
select {
case err := <-errChan:
if err != nil {
t.Fatal(err)
}
case <-time.After(10 * time.Second):
t.Fatal("deadlock")
}
}
// Also test CloseWrite being called before the handshake is
// finished:
{
ln2 := newLocalListener(t)
defer ln2.Close()
netConn, err := net.Dial("tcp", ln2.Addr().String())
if err != nil {
t.Fatal(err)
}
defer netConn.Close()
conn := Client(netConn, testConfig.Clone())
if err := conn.CloseWrite(); err != errEarlyCloseWrite {
t.Errorf("CloseWrite error = %v; want errEarlyCloseWrite", err)
}
}
}
func TestWarningAlertFlood(t *testing.T) {
ln := newLocalListener(t)
defer ln.Close()
server := func() error {
sconn, err := ln.Accept()
if err != nil {
return fmt.Errorf("accept: %v", err)
}
defer sconn.Close()
serverConfig := testConfig.Clone()
srv := Server(sconn, serverConfig)
if err := srv.Handshake(); err != nil {
return fmt.Errorf("handshake: %v", err)
}
defer srv.Close()
_, err = io.ReadAll(srv)
if err == nil {
return errors.New("unexpected lack of error from server")
}
const expected = "too many ignored"
if str := err.Error(); !strings.Contains(str, expected) {
return fmt.Errorf("expected error containing %q, but saw: %s", expected, str)
}
return nil
}
errChan := make(chan error, 1)
go func() { errChan <- server() }()
clientConfig := testConfig.Clone()
clientConfig.MaxVersion = VersionTLS12 // there are no warning alerts in TLS 1.3
conn, err := Dial("tcp", ln.Addr().String(), clientConfig)
if err != nil {
t.Fatal(err)
}
defer conn.Close()
if err := conn.Handshake(); err != nil {
t.Fatal(err)
}
for i := 0; i < maxUselessRecords+1; i++ {
conn.sendAlert(alertNoRenegotiation)
}
if err := <-errChan; err != nil {
t.Fatal(err)
}
}
func TestCloneFuncFields(t *testing.T) {
const expectedCount = 6
called := 0
c1 := Config{
Time: func() time.Time {
called |= 1 << 0
return time.Time{}
},
GetCertificate: func(*ClientHelloInfo) (*Certificate, error) {
called |= 1 << 1
return nil, nil
},
GetClientCertificate: func(*CertificateRequestInfo) (*Certificate, error) {
called |= 1 << 2
return nil, nil
},
GetConfigForClient: func(*ClientHelloInfo) (*Config, error) {
called |= 1 << 3
return nil, nil
},
VerifyPeerCertificate: func(rawCerts [][]byte, verifiedChains [][]*x509.Certificate) error {
called |= 1 << 4
return nil
},
VerifyConnection: func(ConnectionState) error {
called |= 1 << 5
return nil
},
}
c2 := c1.Clone()
c2.Time()
c2.GetCertificate(nil)
c2.GetClientCertificate(nil)
c2.GetConfigForClient(nil)
c2.VerifyPeerCertificate(nil, nil)
c2.VerifyConnection(ConnectionState{})
if called != (1<<expectedCount)-1 {
t.Fatalf("expected %d calls but saw calls %b", expectedCount, called)
}
}
func TestCloneNonFuncFields(t *testing.T) {
var c1 Config
v := reflect.ValueOf(&c1).Elem()
typ := v.Type()
for i := 0; i < typ.NumField(); i++ {
f := v.Field(i)
// testing/quick can't handle functions or interfaces and so
// isn't used here.
switch fn := typ.Field(i).Name; fn {
case "Rand":
f.Set(reflect.ValueOf(io.Reader(os.Stdin)))
case "Time", "GetCertificate", "GetConfigForClient", "VerifyPeerCertificate", "VerifyConnection", "GetClientCertificate":
// DeepEqual can't compare functions. If you add a
// function field to this list, you must also change
// TestCloneFuncFields to ensure that the func field is
// cloned.
case "Certificates":
f.Set(reflect.ValueOf([]Certificate{
{Certificate: [][]byte{{'b'}}},
}))
case "NameToCertificate":
f.Set(reflect.ValueOf(map[string]*Certificate{"a": nil}))
case "RootCAs", "ClientCAs":
f.Set(reflect.ValueOf(x509.NewCertPool()))
case "ClientSessionCache":
f.Set(reflect.ValueOf(NewLRUClientSessionCache(10)))
case "KeyLogWriter":
f.Set(reflect.ValueOf(io.Writer(os.Stdout)))
case "NextProtos":
f.Set(reflect.ValueOf([]string{"a", "b"}))
case "ServerName":
f.Set(reflect.ValueOf("b"))
case "ClientAuth":
f.Set(reflect.ValueOf(VerifyClientCertIfGiven))
case "InsecureSkipVerify", "SessionTicketsDisabled", "DynamicRecordSizingDisabled", "PreferServerCipherSuites":
f.Set(reflect.ValueOf(true))
case "MinVersion", "MaxVersion":
f.Set(reflect.ValueOf(uint16(VersionTLS12)))
case "SessionTicketKey":
f.Set(reflect.ValueOf([32]byte{}))
case "CipherSuites":
f.Set(reflect.ValueOf([]uint16{1, 2}))
case "CurvePreferences":
f.Set(reflect.ValueOf([]CurveID{CurveP256}))
case "Renegotiation":
f.Set(reflect.ValueOf(RenegotiateOnceAsClient))
case "mutex", "autoSessionTicketKeys", "sessionTicketKeys":
continue // these are unexported fields that are handled separately
default:
t.Errorf("all fields must be accounted for, but saw unknown field %q", fn)
}
}
// Set the unexported fields related to session ticket keys, which are copied with Clone().
c1.autoSessionTicketKeys = []ticketKey{c1.ticketKeyFromBytes(c1.SessionTicketKey)}
c1.sessionTicketKeys = []ticketKey{c1.ticketKeyFromBytes(c1.SessionTicketKey)}
c2 := c1.Clone()
if !reflect.DeepEqual(&c1, c2) {
t.Errorf("clone failed to copy a field")
}
}
func TestCloneNilConfig(t *testing.T) {
var config *Config
if cc := config.Clone(); cc != nil {
t.Fatalf("Clone with nil should return nil, got: %+v", cc)
}
}
// changeImplConn is a net.Conn which can change its Write and Close
// methods.
type changeImplConn struct {
net.Conn
writeFunc func([]byte) (int, error)
closeFunc func() error
}
func (w *changeImplConn) Write(p []byte) (n int, err error) {
if w.writeFunc != nil {
return w.writeFunc(p)
}
return w.Conn.Write(p)
}
func (w *changeImplConn) Close() error {
if w.closeFunc != nil {
return w.closeFunc()
}
return w.Conn.Close()
}
func throughput(b *testing.B, version uint16, totalBytes int64, dynamicRecordSizingDisabled bool) {
ln := newLocalListener(b)
defer ln.Close()
N := b.N
// Less than 64KB because Windows appears to use a TCP rwin < 64KB.
// See Issue #15899.
const bufsize = 32 << 10
go func() {
buf := make([]byte, bufsize)
for i := 0; i < N; i++ {
sconn, err := ln.Accept()
if err != nil {
// panic rather than synchronize to avoid benchmark overhead
// (cannot call b.Fatal in goroutine)
panic(fmt.Errorf("accept: %v", err))
}
serverConfig := testConfig.Clone()
serverConfig.CipherSuites = nil // the defaults may prefer faster ciphers
serverConfig.DynamicRecordSizingDisabled = dynamicRecordSizingDisabled
srv := Server(sconn, serverConfig)
if err := srv.Handshake(); err != nil {
panic(fmt.Errorf("handshake: %v", err))
}
if _, err := io.CopyBuffer(srv, srv, buf); err != nil {
panic(fmt.Errorf("copy buffer: %v", err))
}
}
}()
b.SetBytes(totalBytes)
clientConfig := testConfig.Clone()
clientConfig.CipherSuites = nil // the defaults may prefer faster ciphers
clientConfig.DynamicRecordSizingDisabled = dynamicRecordSizingDisabled
clientConfig.MaxVersion = version
buf := make([]byte, bufsize)
chunks := int(math.Ceil(float64(totalBytes) / float64(len(buf))))
for i := 0; i < N; i++ {
conn, err := Dial("tcp", ln.Addr().String(), clientConfig)
if err != nil {
b.Fatal(err)
}
for j := 0; j < chunks; j++ {
_, err := conn.Write(buf)
if err != nil {
b.Fatal(err)
}
_, err = io.ReadFull(conn, buf)
if err != nil {
b.Fatal(err)
}
}
conn.Close()
}
}
func BenchmarkThroughput(b *testing.B) {
for _, mode := range []string{"Max", "Dynamic"} {
for size := 1; size <= 64; size <<= 1 {
name := fmt.Sprintf("%sPacket/%dMB", mode, size)
b.Run(name, func(b *testing.B) {
b.Run("TLSv12", func(b *testing.B) {
throughput(b, VersionTLS12, int64(size<<20), mode == "Max")
})
b.Run("TLSv13", func(b *testing.B) {
throughput(b, VersionTLS13, int64(size<<20), mode == "Max")
})
})
}
}
}
type slowConn struct {
net.Conn
bps int
}
func (c *slowConn) Write(p []byte) (int, error) {
if c.bps == 0 {
panic("too slow")
}
t0 := time.Now()
wrote := 0
for wrote < len(p) {
time.Sleep(100 * time.Microsecond)
allowed := int(time.Since(t0).Seconds()*float64(c.bps)) / 8
if allowed > len(p) {
allowed = len(p)
}
if wrote < allowed {
n, err := c.Conn.Write(p[wrote:allowed])
wrote += n
if err != nil {
return wrote, err
}
}
}
return len(p), nil
}
func latency(b *testing.B, version uint16, bps int, dynamicRecordSizingDisabled bool) {
ln := newLocalListener(b)
defer ln.Close()
N := b.N
go func() {
for i := 0; i < N; i++ {
sconn, err := ln.Accept()
if err != nil {
// panic rather than synchronize to avoid benchmark overhead
// (cannot call b.Fatal in goroutine)
panic(fmt.Errorf("accept: %v", err))
}
serverConfig := testConfig.Clone()
serverConfig.DynamicRecordSizingDisabled = dynamicRecordSizingDisabled
srv := Server(&slowConn{sconn, bps}, serverConfig)
if err := srv.Handshake(); err != nil {
panic(fmt.Errorf("handshake: %v", err))
}
io.Copy(srv, srv)
}
}()
clientConfig := testConfig.Clone()
clientConfig.DynamicRecordSizingDisabled = dynamicRecordSizingDisabled
clientConfig.MaxVersion = version
buf := make([]byte, 16384)
peek := make([]byte, 1)
for i := 0; i < N; i++ {
conn, err := Dial("tcp", ln.Addr().String(), clientConfig)
if err != nil {
b.Fatal(err)
}
// make sure we're connected and previous connection has stopped
if _, err := conn.Write(buf[:1]); err != nil {
b.Fatal(err)
}
if _, err := io.ReadFull(conn, peek); err != nil {
b.Fatal(err)
}
if _, err := conn.Write(buf); err != nil {
b.Fatal(err)
}
if _, err = io.ReadFull(conn, peek); err != nil {
b.Fatal(err)
}
conn.Close()
}
}
func BenchmarkLatency(b *testing.B) {
for _, mode := range []string{"Max", "Dynamic"} {
for _, kbps := range []int{200, 500, 1000, 2000, 5000} {
name := fmt.Sprintf("%sPacket/%dkbps", mode, kbps)
b.Run(name, func(b *testing.B) {
b.Run("TLSv12", func(b *testing.B) {
latency(b, VersionTLS12, kbps*1000, mode == "Max")
})
b.Run("TLSv13", func(b *testing.B) {
latency(b, VersionTLS13, kbps*1000, mode == "Max")
})
})
}
}
}
func TestConnectionStateMarshal(t *testing.T) {
cs := &ConnectionState{}
_, err := json.Marshal(cs)
if err != nil {
t.Errorf("json.Marshal failed on ConnectionState: %v", err)
}
}
func TestConnectionState(t *testing.T) {
issuer, err := x509.ParseCertificate(testRSACertificateIssuer)
if err != nil {
panic(err)
}
rootCAs := x509.NewCertPool()
rootCAs.AddCert(issuer)
now := func() time.Time { return time.Unix(1476984729, 0) }
const alpnProtocol = "golang"
const serverName = "example.golang"
var scts = [][]byte{[]byte("dummy sct 1"), []byte("dummy sct 2")}
var ocsp = []byte("dummy ocsp")
for _, v := range []uint16{VersionTLS12, VersionTLS13} {
var name string
switch v {
case VersionTLS12:
name = "TLSv12"
case VersionTLS13:
name = "TLSv13"
}
t.Run(name, func(t *testing.T) {
config := &Config{
Time: now,
Rand: zeroSource{},
Certificates: make([]Certificate, 1),
MaxVersion: v,
RootCAs: rootCAs,
ClientCAs: rootCAs,
ClientAuth: RequireAndVerifyClientCert,
NextProtos: []string{alpnProtocol},
ServerName: serverName,
}
config.Certificates[0].Certificate = [][]byte{testRSACertificate}
config.Certificates[0].PrivateKey = testRSAPrivateKey
config.Certificates[0].SignedCertificateTimestamps = scts
config.Certificates[0].OCSPStaple = ocsp
ss, cs, err := testHandshake(t, config, config)
if err != nil {
t.Fatalf("Handshake failed: %v", err)
}
if ss.Version != v || cs.Version != v {
t.Errorf("Got versions %x (server) and %x (client), expected %x", ss.Version, cs.Version, v)
}
if !ss.HandshakeComplete || !cs.HandshakeComplete {
t.Errorf("Got HandshakeComplete %v (server) and %v (client), expected true", ss.HandshakeComplete, cs.HandshakeComplete)
}
if ss.DidResume || cs.DidResume {
t.Errorf("Got DidResume %v (server) and %v (client), expected false", ss.DidResume, cs.DidResume)
}
if ss.CipherSuite == 0 || cs.CipherSuite == 0 {
t.Errorf("Got invalid cipher suite: %v (server) and %v (client)", ss.CipherSuite, cs.CipherSuite)
}
if ss.NegotiatedProtocol != alpnProtocol || cs.NegotiatedProtocol != alpnProtocol {
t.Errorf("Got negotiated protocol %q (server) and %q (client), expected %q", ss.NegotiatedProtocol, cs.NegotiatedProtocol, alpnProtocol)
}
if !cs.NegotiatedProtocolIsMutual {
t.Errorf("Got false NegotiatedProtocolIsMutual on the client side")
}
// NegotiatedProtocolIsMutual on the server side is unspecified.
if ss.ServerName != serverName {
t.Errorf("Got server name %q, expected %q", ss.ServerName, serverName)
}
if cs.ServerName != serverName {
t.Errorf("Got server name on client connection %q, expected %q", cs.ServerName, serverName)
}
if len(ss.PeerCertificates) != 1 || len(cs.PeerCertificates) != 1 {
t.Errorf("Got %d (server) and %d (client) peer certificates, expected %d", len(ss.PeerCertificates), len(cs.PeerCertificates), 1)
}
if len(ss.VerifiedChains) != 1 || len(cs.VerifiedChains) != 1 {
t.Errorf("Got %d (server) and %d (client) verified chains, expected %d", len(ss.VerifiedChains), len(cs.VerifiedChains), 1)
} else if len(ss.VerifiedChains[0]) != 2 || len(cs.VerifiedChains[0]) != 2 {
t.Errorf("Got %d (server) and %d (client) long verified chain, expected %d", len(ss.VerifiedChains[0]), len(cs.VerifiedChains[0]), 2)
}
if len(cs.SignedCertificateTimestamps) != 2 {
t.Errorf("Got %d SCTs, expected %d", len(cs.SignedCertificateTimestamps), 2)
}
if !bytes.Equal(cs.OCSPResponse, ocsp) {
t.Errorf("Got OCSPs %x, expected %x", cs.OCSPResponse, ocsp)
}
// Only TLS 1.3 supports OCSP and SCTs on client certs.
if v == VersionTLS13 {
if len(ss.SignedCertificateTimestamps) != 2 {
t.Errorf("Got %d client SCTs, expected %d", len(ss.SignedCertificateTimestamps), 2)
}
if !bytes.Equal(ss.OCSPResponse, ocsp) {
t.Errorf("Got client OCSPs %x, expected %x", ss.OCSPResponse, ocsp)
}
}
if v == VersionTLS13 {
if ss.TLSUnique != nil || cs.TLSUnique != nil {
t.Errorf("Got TLSUnique %x (server) and %x (client), expected nil in TLS 1.3", ss.TLSUnique, cs.TLSUnique)
}
} else {
if ss.TLSUnique == nil || cs.TLSUnique == nil {
t.Errorf("Got TLSUnique %x (server) and %x (client), expected non-nil", ss.TLSUnique, cs.TLSUnique)
}
}
})
}
}
// Issue 28744: Ensure that we don't modify memory
// that Config doesn't own such as Certificates.
func TestBuildNameToCertificate_doesntModifyCertificates(t *testing.T) {
c0 := Certificate{
Certificate: [][]byte{testRSACertificate},
PrivateKey: testRSAPrivateKey,
}
c1 := Certificate{
Certificate: [][]byte{testSNICertificate},
PrivateKey: testRSAPrivateKey,
}
config := testConfig.Clone()
config.Certificates = []Certificate{c0, c1}
config.BuildNameToCertificate()
got := config.Certificates
want := []Certificate{c0, c1}
if !reflect.DeepEqual(got, want) {
t.Fatalf("Certificates were mutated by BuildNameToCertificate\nGot: %#v\nWant: %#v\n", got, want)
}
}
func testingKey(s string) string { return strings.ReplaceAll(s, "TESTING KEY", "PRIVATE KEY") }
func TestClientHelloInfo_SupportsCertificate(t *testing.T) {
rsaCert := &Certificate{
Certificate: [][]byte{testRSACertificate},
PrivateKey: testRSAPrivateKey,
}
pkcs1Cert := &Certificate{
Certificate: [][]byte{testRSACertificate},
PrivateKey: testRSAPrivateKey,
SupportedSignatureAlgorithms: []SignatureScheme{PKCS1WithSHA1, PKCS1WithSHA256},
}
ecdsaCert := &Certificate{
// ECDSA P-256 certificate
Certificate: [][]byte{testP256Certificate},
PrivateKey: testP256PrivateKey,
}
ed25519Cert := &Certificate{
Certificate: [][]byte{testEd25519Certificate},
PrivateKey: testEd25519PrivateKey,
}
tests := []struct {
c *Certificate
chi *ClientHelloInfo
wantErr string
}{
{rsaCert, &ClientHelloInfo{
ServerName: "example.golang",
SignatureSchemes: []SignatureScheme{PSSWithSHA256},
SupportedVersions: []uint16{VersionTLS13},
}, ""},
{ecdsaCert, &ClientHelloInfo{
SignatureSchemes: []SignatureScheme{PSSWithSHA256, ECDSAWithP256AndSHA256},
SupportedVersions: []uint16{VersionTLS13, VersionTLS12},
}, ""},
{rsaCert, &ClientHelloInfo{
ServerName: "example.com",
SignatureSchemes: []SignatureScheme{PSSWithSHA256},
SupportedVersions: []uint16{VersionTLS13},
}, "not valid for requested server name"},
{ecdsaCert, &ClientHelloInfo{
SignatureSchemes: []SignatureScheme{ECDSAWithP384AndSHA384},
SupportedVersions: []uint16{VersionTLS13},
}, "signature algorithms"},
{pkcs1Cert, &ClientHelloInfo{
SignatureSchemes: []SignatureScheme{PSSWithSHA256, ECDSAWithP256AndSHA256},
SupportedVersions: []uint16{VersionTLS13},
}, "signature algorithms"},
{rsaCert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_RSA_WITH_AES_128_GCM_SHA256},
SignatureSchemes: []SignatureScheme{PKCS1WithSHA1},
SupportedVersions: []uint16{VersionTLS13, VersionTLS12},
}, "signature algorithms"},
{rsaCert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_RSA_WITH_AES_128_GCM_SHA256},
SignatureSchemes: []SignatureScheme{PKCS1WithSHA1},
SupportedVersions: []uint16{VersionTLS13, VersionTLS12},
config: &Config{
MaxVersion: VersionTLS12,
},
}, ""}, // Check that mutual version selection works.
{ecdsaCert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
SupportedCurves: []CurveID{CurveP256},
SupportedPoints: []uint8{pointFormatUncompressed},
SignatureSchemes: []SignatureScheme{ECDSAWithP256AndSHA256},
SupportedVersions: []uint16{VersionTLS12},
}, ""},
{ecdsaCert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
SupportedCurves: []CurveID{CurveP256},
SupportedPoints: []uint8{pointFormatUncompressed},
SignatureSchemes: []SignatureScheme{ECDSAWithP384AndSHA384},
SupportedVersions: []uint16{VersionTLS12},
}, ""}, // TLS 1.2 does not restrict curves based on the SignatureScheme.
{ecdsaCert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
SupportedCurves: []CurveID{CurveP256},
SupportedPoints: []uint8{pointFormatUncompressed},
SignatureSchemes: nil,
SupportedVersions: []uint16{VersionTLS12},
}, ""}, // TLS 1.2 comes with default signature schemes.
{ecdsaCert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_RSA_WITH_AES_128_GCM_SHA256},
SupportedCurves: []CurveID{CurveP256},
SupportedPoints: []uint8{pointFormatUncompressed},
SignatureSchemes: []SignatureScheme{ECDSAWithP256AndSHA256},
SupportedVersions: []uint16{VersionTLS12},
}, "cipher suite"},
{ecdsaCert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
SupportedCurves: []CurveID{CurveP256},
SupportedPoints: []uint8{pointFormatUncompressed},
SignatureSchemes: []SignatureScheme{ECDSAWithP256AndSHA256},
SupportedVersions: []uint16{VersionTLS12},
config: &Config{
CipherSuites: []uint16{TLS_RSA_WITH_AES_128_GCM_SHA256},
},
}, "cipher suite"},
{ecdsaCert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
SupportedCurves: []CurveID{CurveP384},
SupportedPoints: []uint8{pointFormatUncompressed},
SignatureSchemes: []SignatureScheme{ECDSAWithP256AndSHA256},
SupportedVersions: []uint16{VersionTLS12},
}, "certificate curve"},
{ecdsaCert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
SupportedCurves: []CurveID{CurveP256},
SupportedPoints: []uint8{1},
SignatureSchemes: []SignatureScheme{ECDSAWithP256AndSHA256},
SupportedVersions: []uint16{VersionTLS12},
}, "doesn't support ECDHE"},
{ecdsaCert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
SupportedCurves: []CurveID{CurveP256},
SupportedPoints: []uint8{pointFormatUncompressed},
SignatureSchemes: []SignatureScheme{PSSWithSHA256},
SupportedVersions: []uint16{VersionTLS12},
}, "signature algorithms"},
{ed25519Cert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
SupportedCurves: []CurveID{CurveP256}, // only relevant for ECDHE support
SupportedPoints: []uint8{pointFormatUncompressed},
SignatureSchemes: []SignatureScheme{Ed25519},
SupportedVersions: []uint16{VersionTLS12},
}, ""},
{ed25519Cert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
SupportedCurves: []CurveID{CurveP256}, // only relevant for ECDHE support
SupportedPoints: []uint8{pointFormatUncompressed},
SignatureSchemes: []SignatureScheme{Ed25519},
SupportedVersions: []uint16{VersionTLS10},
}, "doesn't support Ed25519"},
{ed25519Cert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256},
SupportedCurves: []CurveID{},
SupportedPoints: []uint8{pointFormatUncompressed},
SignatureSchemes: []SignatureScheme{Ed25519},
SupportedVersions: []uint16{VersionTLS12},
}, "doesn't support ECDHE"},
{rsaCert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA},
SupportedCurves: []CurveID{CurveP256}, // only relevant for ECDHE support
SupportedPoints: []uint8{pointFormatUncompressed},
SupportedVersions: []uint16{VersionTLS10},
}, ""},
{rsaCert, &ClientHelloInfo{
CipherSuites: []uint16{TLS_RSA_WITH_AES_128_GCM_SHA256},
SupportedVersions: []uint16{VersionTLS12},
}, ""}, // static RSA fallback
}
for i, tt := range tests {
err := tt.chi.SupportsCertificate(tt.c)
switch {
case tt.wantErr == "" && err != nil:
t.Errorf("%d: unexpected error: %v", i, err)
case tt.wantErr != "" && err == nil:
t.Errorf("%d: unexpected success", i)
case tt.wantErr != "" && !strings.Contains(err.Error(), tt.wantErr):
t.Errorf("%d: got error %q, expected %q", i, err, tt.wantErr)
}
}
}
func TestCipherSuites(t *testing.T) {
var lastID uint16
for _, c := range CipherSuites() {
if lastID > c.ID {
t.Errorf("CipherSuites are not ordered by ID: got %#04x after %#04x", c.ID, lastID)
} else {
lastID = c.ID
}
if c.Insecure {
t.Errorf("%#04x: Insecure CipherSuite returned by CipherSuites()", c.ID)
}
}
lastID = 0
for _, c := range InsecureCipherSuites() {
if lastID > c.ID {
t.Errorf("InsecureCipherSuites are not ordered by ID: got %#04x after %#04x", c.ID, lastID)
} else {
lastID = c.ID
}
if !c.Insecure {
t.Errorf("%#04x: not Insecure CipherSuite returned by InsecureCipherSuites()", c.ID)
}
}
CipherSuiteByID := func(id uint16) *CipherSuite {
for _, c := range CipherSuites() {
if c.ID == id {
return c
}
}
for _, c := range InsecureCipherSuites() {
if c.ID == id {
return c
}
}
return nil
}
for _, c := range cipherSuites {
cc := CipherSuiteByID(c.id)
if cc == nil {
t.Errorf("%#04x: no CipherSuite entry", c.id)
continue
}
if tls12Only := c.flags&suiteTLS12 != 0; tls12Only && len(cc.SupportedVersions) != 1 {
t.Errorf("%#04x: suite is TLS 1.2 only, but SupportedVersions is %v", c.id, cc.SupportedVersions)
} else if !tls12Only && len(cc.SupportedVersions) != 3 {
t.Errorf("%#04x: suite TLS 1.0-1.2, but SupportedVersions is %v", c.id, cc.SupportedVersions)
}
if got := CipherSuiteName(c.id); got != cc.Name {
t.Errorf("%#04x: unexpected CipherSuiteName: got %q, expected %q", c.id, got, cc.Name)
}
}
for _, c := range cipherSuitesTLS13 {
cc := CipherSuiteByID(c.id)
if cc == nil {
t.Errorf("%#04x: no CipherSuite entry", c.id)
continue
}
if cc.Insecure {
t.Errorf("%#04x: Insecure %v, expected false", c.id, cc.Insecure)
}
if len(cc.SupportedVersions) != 1 || cc.SupportedVersions[0] != VersionTLS13 {
t.Errorf("%#04x: suite is TLS 1.3 only, but SupportedVersions is %v", c.id, cc.SupportedVersions)
}
if got := CipherSuiteName(c.id); got != cc.Name {
t.Errorf("%#04x: unexpected CipherSuiteName: got %q, expected %q", c.id, got, cc.Name)
}
}
if got := CipherSuiteName(0xabc); got != "0x0ABC" {
t.Errorf("unexpected fallback CipherSuiteName: got %q, expected 0x0ABC", got)
}
if len(cipherSuitesPreferenceOrder) != len(cipherSuites) {
t.Errorf("cipherSuitesPreferenceOrder is not the same size as cipherSuites")
}
if len(cipherSuitesPreferenceOrderNoAES) != len(cipherSuitesPreferenceOrder) {
t.Errorf("cipherSuitesPreferenceOrderNoAES is not the same size as cipherSuitesPreferenceOrder")
}
// Check that disabled suites are at the end of the preference lists, and
// that they are marked insecure.
for i, id := range disabledCipherSuites {
offset := len(cipherSuitesPreferenceOrder) - len(disabledCipherSuites)
if cipherSuitesPreferenceOrder[offset+i] != id {
t.Errorf("disabledCipherSuites[%d]: not at the end of cipherSuitesPreferenceOrder", i)
}
if cipherSuitesPreferenceOrderNoAES[offset+i] != id {
t.Errorf("disabledCipherSuites[%d]: not at the end of cipherSuitesPreferenceOrderNoAES", i)
}
c := CipherSuiteByID(id)
if c == nil {
t.Errorf("%#04x: no CipherSuite entry", id)
continue
}
if !c.Insecure {
t.Errorf("%#04x: disabled by default but not marked insecure", id)
}
}
for i, prefOrder := range [][]uint16{cipherSuitesPreferenceOrder, cipherSuitesPreferenceOrderNoAES} {
// Check that insecure and HTTP/2 bad cipher suites are at the end of
// the preference lists.
var sawInsecure, sawBad bool
for _, id := range prefOrder {
c := CipherSuiteByID(id)
if c == nil {
t.Errorf("%#04x: no CipherSuite entry", id)
continue
}
if c.Insecure {
sawInsecure = true
} else if sawInsecure {
t.Errorf("%#04x: secure suite after insecure one(s)", id)
}
if http2isBadCipher(id) {
sawBad = true
} else if sawBad {
t.Errorf("%#04x: non-bad suite after bad HTTP/2 one(s)", id)
}
}
// Check that the list is sorted according to the documented criteria.
isBetter := func(a, b int) bool {
aSuite, bSuite := cipherSuiteByID(prefOrder[a]), cipherSuiteByID(prefOrder[b])
aName, bName := CipherSuiteName(prefOrder[a]), CipherSuiteName(prefOrder[b])
// * < RC4
if !strings.Contains(aName, "RC4") && strings.Contains(bName, "RC4") {
return true
} else if strings.Contains(aName, "RC4") && !strings.Contains(bName, "RC4") {
return false
}
// * < CBC_SHA256
if !strings.Contains(aName, "CBC_SHA256") && strings.Contains(bName, "CBC_SHA256") {
return true
} else if strings.Contains(aName, "CBC_SHA256") && !strings.Contains(bName, "CBC_SHA256") {
return false
}
// * < 3DES
if !strings.Contains(aName, "3DES") && strings.Contains(bName, "3DES") {
return true
} else if strings.Contains(aName, "3DES") && !strings.Contains(bName, "3DES") {
return false
}
// ECDHE < *
if aSuite.flags&suiteECDHE != 0 && bSuite.flags&suiteECDHE == 0 {
return true
} else if aSuite.flags&suiteECDHE == 0 && bSuite.flags&suiteECDHE != 0 {
return false
}
// AEAD < CBC
if aSuite.aead != nil && bSuite.aead == nil {
return true
} else if aSuite.aead == nil && bSuite.aead != nil {
return false
}
// AES < ChaCha20
if strings.Contains(aName, "AES") && strings.Contains(bName, "CHACHA20") {
return i == 0 // true for cipherSuitesPreferenceOrder
} else if strings.Contains(aName, "CHACHA20") && strings.Contains(bName, "AES") {
return i != 0 // true for cipherSuitesPreferenceOrderNoAES
}
// AES-128 < AES-256
if strings.Contains(aName, "AES_128") && strings.Contains(bName, "AES_256") {
return true
} else if strings.Contains(aName, "AES_256") && strings.Contains(bName, "AES_128") {
return false
}
// ECDSA < RSA
if aSuite.flags&suiteECSign != 0 && bSuite.flags&suiteECSign == 0 {
return true
} else if aSuite.flags&suiteECSign == 0 && bSuite.flags&suiteECSign != 0 {
return false
}
t.Fatalf("two ciphersuites are equal by all criteria: %v and %v", aName, bName)
panic("unreachable")
}
if !sort.SliceIsSorted(prefOrder, isBetter) {
t.Error("preference order is not sorted according to the rules")
}
}
}
// http2isBadCipher is copied from net/http.
// TODO: if it ends up exposed somewhere, use that instead.
func http2isBadCipher(cipher uint16) bool {
switch cipher {
case TLS_RSA_WITH_RC4_128_SHA,
TLS_RSA_WITH_3DES_EDE_CBC_SHA,
TLS_RSA_WITH_AES_128_CBC_SHA,
TLS_RSA_WITH_AES_256_CBC_SHA,
TLS_RSA_WITH_AES_128_CBC_SHA256,
TLS_RSA_WITH_AES_128_GCM_SHA256,
TLS_RSA_WITH_AES_256_GCM_SHA384,
TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
TLS_ECDHE_RSA_WITH_RC4_128_SHA,
TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256:
return true
default:
return false
}
}
type brokenSigner struct{ crypto.Signer }
func (s brokenSigner) Sign(rand io.Reader, digest []byte, opts crypto.SignerOpts) (signature []byte, err error) {
// Replace opts with opts.HashFunc(), so rsa.PSSOptions are discarded.
return s.Signer.Sign(rand, digest, opts.HashFunc())
}
// TestPKCS1OnlyCert uses a client certificate with a broken crypto.Signer that
// always makes PKCS #1 v1.5 signatures, so can't be used with RSA-PSS.
func TestPKCS1OnlyCert(t *testing.T) {
clientConfig := testConfig.Clone()
clientConfig.Certificates = []Certificate{{
Certificate: [][]byte{testRSACertificate},
PrivateKey: brokenSigner{testRSAPrivateKey},
}}
serverConfig := testConfig.Clone()
serverConfig.MaxVersion = VersionTLS12 // TLS 1.3 doesn't support PKCS #1 v1.5
serverConfig.ClientAuth = RequireAnyClientCert
// If RSA-PSS is selected, the handshake should fail.
if _, _, err := testHandshake(t, clientConfig, serverConfig); err == nil {
t.Fatal("expected broken certificate to cause connection to fail")
}
clientConfig.Certificates[0].SupportedSignatureAlgorithms =
[]SignatureScheme{PKCS1WithSHA1, PKCS1WithSHA256}
// But if the certificate restricts supported algorithms, RSA-PSS should not
// be selected, and the handshake should succeed.
if _, _, err := testHandshake(t, clientConfig, serverConfig); err != nil {
t.Error(err)
}
}
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