Source file src/crypto/tls/handshake_server_test.go

     1  // Copyright 2009 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package tls
     6  
     7  import (
     8  	"bytes"
     9  	"context"
    10  	"crypto"
    11  	"crypto/elliptic"
    12  	"crypto/x509"
    13  	"encoding/pem"
    14  	"errors"
    15  	"fmt"
    16  	"io"
    17  	"net"
    18  	"os"
    19  	"os/exec"
    20  	"path/filepath"
    21  	"runtime"
    22  	"strings"
    23  	"testing"
    24  	"time"
    25  
    26  	"golang.org/x/crypto/curve25519"
    27  )
    28  
    29  func testClientHello(t *testing.T, serverConfig *Config, m handshakeMessage) {
    30  	testClientHelloFailure(t, serverConfig, m, "")
    31  }
    32  
    33  func testClientHelloFailure(t *testing.T, serverConfig *Config, m handshakeMessage, expectedSubStr string) {
    34  	c, s := localPipe(t)
    35  	go func() {
    36  		cli := Client(c, testConfig)
    37  		if ch, ok := m.(*clientHelloMsg); ok {
    38  			cli.vers = ch.vers
    39  		}
    40  		cli.writeRecord(recordTypeHandshake, m.marshal())
    41  		c.Close()
    42  	}()
    43  	ctx := context.Background()
    44  	conn := Server(s, serverConfig)
    45  	ch, err := conn.readClientHello(ctx)
    46  	hs := serverHandshakeState{
    47  		c:           conn,
    48  		ctx:         ctx,
    49  		clientHello: ch,
    50  	}
    51  	if err == nil {
    52  		err = hs.processClientHello()
    53  	}
    54  	if err == nil {
    55  		err = hs.pickCipherSuite()
    56  	}
    57  	s.Close()
    58  	if len(expectedSubStr) == 0 {
    59  		if err != nil && err != io.EOF {
    60  			t.Errorf("Got error: %s; expected to succeed", err)
    61  		}
    62  	} else if err == nil || !strings.Contains(err.Error(), expectedSubStr) {
    63  		t.Errorf("Got error: %v; expected to match substring '%s'", err, expectedSubStr)
    64  	}
    65  }
    66  
    67  func TestSimpleError(t *testing.T) {
    68  	testClientHelloFailure(t, testConfig, &serverHelloDoneMsg{}, "unexpected handshake message")
    69  }
    70  
    71  var badProtocolVersions = []uint16{0x0000, 0x0005, 0x0100, 0x0105, 0x0200, 0x0205, VersionSSL30}
    72  
    73  func TestRejectBadProtocolVersion(t *testing.T) {
    74  	config := testConfig.Clone()
    75  	config.MinVersion = VersionSSL30
    76  	for _, v := range badProtocolVersions {
    77  		testClientHelloFailure(t, config, &clientHelloMsg{
    78  			vers:   v,
    79  			random: make([]byte, 32),
    80  		}, "unsupported versions")
    81  	}
    82  	testClientHelloFailure(t, config, &clientHelloMsg{
    83  		vers:              VersionTLS12,
    84  		supportedVersions: badProtocolVersions,
    85  		random:            make([]byte, 32),
    86  	}, "unsupported versions")
    87  }
    88  
    89  func TestNoSuiteOverlap(t *testing.T) {
    90  	clientHello := &clientHelloMsg{
    91  		vers:               VersionTLS10,
    92  		random:             make([]byte, 32),
    93  		cipherSuites:       []uint16{0xff00},
    94  		compressionMethods: []uint8{compressionNone},
    95  	}
    96  	testClientHelloFailure(t, testConfig, clientHello, "no cipher suite supported by both client and server")
    97  }
    98  
    99  func TestNoCompressionOverlap(t *testing.T) {
   100  	clientHello := &clientHelloMsg{
   101  		vers:               VersionTLS10,
   102  		random:             make([]byte, 32),
   103  		cipherSuites:       []uint16{TLS_RSA_WITH_RC4_128_SHA},
   104  		compressionMethods: []uint8{0xff},
   105  	}
   106  	testClientHelloFailure(t, testConfig, clientHello, "client does not support uncompressed connections")
   107  }
   108  
   109  func TestNoRC4ByDefault(t *testing.T) {
   110  	clientHello := &clientHelloMsg{
   111  		vers:               VersionTLS10,
   112  		random:             make([]byte, 32),
   113  		cipherSuites:       []uint16{TLS_RSA_WITH_RC4_128_SHA},
   114  		compressionMethods: []uint8{compressionNone},
   115  	}
   116  	serverConfig := testConfig.Clone()
   117  	// Reset the enabled cipher suites to nil in order to test the
   118  	// defaults.
   119  	serverConfig.CipherSuites = nil
   120  	testClientHelloFailure(t, serverConfig, clientHello, "no cipher suite supported by both client and server")
   121  }
   122  
   123  func TestRejectSNIWithTrailingDot(t *testing.T) {
   124  	testClientHelloFailure(t, testConfig, &clientHelloMsg{
   125  		vers:       VersionTLS12,
   126  		random:     make([]byte, 32),
   127  		serverName: "foo.com.",
   128  	}, "unexpected message")
   129  }
   130  
   131  func TestDontSelectECDSAWithRSAKey(t *testing.T) {
   132  	// Test that, even when both sides support an ECDSA cipher suite, it
   133  	// won't be selected if the server's private key doesn't support it.
   134  	clientHello := &clientHelloMsg{
   135  		vers:               VersionTLS10,
   136  		random:             make([]byte, 32),
   137  		cipherSuites:       []uint16{TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA},
   138  		compressionMethods: []uint8{compressionNone},
   139  		supportedCurves:    []CurveID{CurveP256},
   140  		supportedPoints:    []uint8{pointFormatUncompressed},
   141  	}
   142  	serverConfig := testConfig.Clone()
   143  	serverConfig.CipherSuites = clientHello.cipherSuites
   144  	serverConfig.Certificates = make([]Certificate, 1)
   145  	serverConfig.Certificates[0].Certificate = [][]byte{testECDSACertificate}
   146  	serverConfig.Certificates[0].PrivateKey = testECDSAPrivateKey
   147  	serverConfig.BuildNameToCertificate()
   148  	// First test that it *does* work when the server's key is ECDSA.
   149  	testClientHello(t, serverConfig, clientHello)
   150  
   151  	// Now test that switching to an RSA key causes the expected error (and
   152  	// not an internal error about a signing failure).
   153  	serverConfig.Certificates = testConfig.Certificates
   154  	testClientHelloFailure(t, serverConfig, clientHello, "no cipher suite supported by both client and server")
   155  }
   156  
   157  func TestDontSelectRSAWithECDSAKey(t *testing.T) {
   158  	// Test that, even when both sides support an RSA cipher suite, it
   159  	// won't be selected if the server's private key doesn't support it.
   160  	clientHello := &clientHelloMsg{
   161  		vers:               VersionTLS10,
   162  		random:             make([]byte, 32),
   163  		cipherSuites:       []uint16{TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA},
   164  		compressionMethods: []uint8{compressionNone},
   165  		supportedCurves:    []CurveID{CurveP256},
   166  		supportedPoints:    []uint8{pointFormatUncompressed},
   167  	}
   168  	serverConfig := testConfig.Clone()
   169  	serverConfig.CipherSuites = clientHello.cipherSuites
   170  	// First test that it *does* work when the server's key is RSA.
   171  	testClientHello(t, serverConfig, clientHello)
   172  
   173  	// Now test that switching to an ECDSA key causes the expected error
   174  	// (and not an internal error about a signing failure).
   175  	serverConfig.Certificates = make([]Certificate, 1)
   176  	serverConfig.Certificates[0].Certificate = [][]byte{testECDSACertificate}
   177  	serverConfig.Certificates[0].PrivateKey = testECDSAPrivateKey
   178  	serverConfig.BuildNameToCertificate()
   179  	testClientHelloFailure(t, serverConfig, clientHello, "no cipher suite supported by both client and server")
   180  }
   181  
   182  func TestRenegotiationExtension(t *testing.T) {
   183  	clientHello := &clientHelloMsg{
   184  		vers:                         VersionTLS12,
   185  		compressionMethods:           []uint8{compressionNone},
   186  		random:                       make([]byte, 32),
   187  		secureRenegotiationSupported: true,
   188  		cipherSuites:                 []uint16{TLS_RSA_WITH_RC4_128_SHA},
   189  	}
   190  
   191  	bufChan := make(chan []byte, 1)
   192  	c, s := localPipe(t)
   193  
   194  	go func() {
   195  		cli := Client(c, testConfig)
   196  		cli.vers = clientHello.vers
   197  		cli.writeRecord(recordTypeHandshake, clientHello.marshal())
   198  
   199  		buf := make([]byte, 1024)
   200  		n, err := c.Read(buf)
   201  		if err != nil {
   202  			t.Errorf("Server read returned error: %s", err)
   203  			return
   204  		}
   205  		c.Close()
   206  		bufChan <- buf[:n]
   207  	}()
   208  
   209  	Server(s, testConfig).Handshake()
   210  	buf := <-bufChan
   211  
   212  	if len(buf) < 5+4 {
   213  		t.Fatalf("Server returned short message of length %d", len(buf))
   214  	}
   215  	// buf contains a TLS record, with a 5 byte record header and a 4 byte
   216  	// handshake header. The length of the ServerHello is taken from the
   217  	// handshake header.
   218  	serverHelloLen := int(buf[6])<<16 | int(buf[7])<<8 | int(buf[8])
   219  
   220  	var serverHello serverHelloMsg
   221  	// unmarshal expects to be given the handshake header, but
   222  	// serverHelloLen doesn't include it.
   223  	if !serverHello.unmarshal(buf[5 : 9+serverHelloLen]) {
   224  		t.Fatalf("Failed to parse ServerHello")
   225  	}
   226  
   227  	if !serverHello.secureRenegotiationSupported {
   228  		t.Errorf("Secure renegotiation extension was not echoed.")
   229  	}
   230  }
   231  
   232  func TestTLS12OnlyCipherSuites(t *testing.T) {
   233  	// Test that a Server doesn't select a TLS 1.2-only cipher suite when
   234  	// the client negotiates TLS 1.1.
   235  	clientHello := &clientHelloMsg{
   236  		vers:   VersionTLS11,
   237  		random: make([]byte, 32),
   238  		cipherSuites: []uint16{
   239  			// The Server, by default, will use the client's
   240  			// preference order. So the GCM cipher suite
   241  			// will be selected unless it's excluded because
   242  			// of the version in this ClientHello.
   243  			TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
   244  			TLS_RSA_WITH_RC4_128_SHA,
   245  		},
   246  		compressionMethods: []uint8{compressionNone},
   247  		supportedCurves:    []CurveID{CurveP256, CurveP384, CurveP521},
   248  		supportedPoints:    []uint8{pointFormatUncompressed},
   249  	}
   250  
   251  	c, s := localPipe(t)
   252  	replyChan := make(chan any)
   253  	go func() {
   254  		cli := Client(c, testConfig)
   255  		cli.vers = clientHello.vers
   256  		cli.writeRecord(recordTypeHandshake, clientHello.marshal())
   257  		reply, err := cli.readHandshake()
   258  		c.Close()
   259  		if err != nil {
   260  			replyChan <- err
   261  		} else {
   262  			replyChan <- reply
   263  		}
   264  	}()
   265  	config := testConfig.Clone()
   266  	config.CipherSuites = clientHello.cipherSuites
   267  	Server(s, config).Handshake()
   268  	s.Close()
   269  	reply := <-replyChan
   270  	if err, ok := reply.(error); ok {
   271  		t.Fatal(err)
   272  	}
   273  	serverHello, ok := reply.(*serverHelloMsg)
   274  	if !ok {
   275  		t.Fatalf("didn't get ServerHello message in reply. Got %v\n", reply)
   276  	}
   277  	if s := serverHello.cipherSuite; s != TLS_RSA_WITH_RC4_128_SHA {
   278  		t.Fatalf("bad cipher suite from server: %x", s)
   279  	}
   280  }
   281  
   282  func TestTLSPointFormats(t *testing.T) {
   283  	// Test that a Server returns the ec_point_format extension when ECC is
   284  	// negotiated, and not returned on RSA handshake.
   285  	tests := []struct {
   286  		name                string
   287  		cipherSuites        []uint16
   288  		supportedCurves     []CurveID
   289  		supportedPoints     []uint8
   290  		wantSupportedPoints bool
   291  	}{
   292  		{"ECC", []uint16{TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA}, []CurveID{CurveP256}, []uint8{compressionNone}, true},
   293  		{"RSA", []uint16{TLS_RSA_WITH_AES_256_GCM_SHA384}, nil, nil, false},
   294  	}
   295  	for _, tt := range tests {
   296  		t.Run(tt.name, func(t *testing.T) {
   297  			clientHello := &clientHelloMsg{
   298  				vers:               VersionTLS12,
   299  				random:             make([]byte, 32),
   300  				cipherSuites:       tt.cipherSuites,
   301  				compressionMethods: []uint8{compressionNone},
   302  				supportedCurves:    tt.supportedCurves,
   303  				supportedPoints:    tt.supportedPoints,
   304  			}
   305  
   306  			c, s := localPipe(t)
   307  			replyChan := make(chan any)
   308  			go func() {
   309  				cli := Client(c, testConfig)
   310  				cli.vers = clientHello.vers
   311  				cli.writeRecord(recordTypeHandshake, clientHello.marshal())
   312  				reply, err := cli.readHandshake()
   313  				c.Close()
   314  				if err != nil {
   315  					replyChan <- err
   316  				} else {
   317  					replyChan <- reply
   318  				}
   319  			}()
   320  			config := testConfig.Clone()
   321  			config.CipherSuites = clientHello.cipherSuites
   322  			Server(s, config).Handshake()
   323  			s.Close()
   324  			reply := <-replyChan
   325  			if err, ok := reply.(error); ok {
   326  				t.Fatal(err)
   327  			}
   328  			serverHello, ok := reply.(*serverHelloMsg)
   329  			if !ok {
   330  				t.Fatalf("didn't get ServerHello message in reply. Got %v\n", reply)
   331  			}
   332  			if tt.wantSupportedPoints {
   333  				if len(serverHello.supportedPoints) < 1 {
   334  					t.Fatal("missing ec_point_format extension from server")
   335  				}
   336  				found := false
   337  				for _, p := range serverHello.supportedPoints {
   338  					if p == pointFormatUncompressed {
   339  						found = true
   340  						break
   341  					}
   342  				}
   343  				if !found {
   344  					t.Fatal("missing uncompressed format in ec_point_format extension from server")
   345  				}
   346  			} else {
   347  				if len(serverHello.supportedPoints) != 0 {
   348  					t.Fatalf("unexcpected ec_point_format extension from server: %v", serverHello.supportedPoints)
   349  				}
   350  			}
   351  		})
   352  	}
   353  }
   354  
   355  func TestAlertForwarding(t *testing.T) {
   356  	c, s := localPipe(t)
   357  	go func() {
   358  		Client(c, testConfig).sendAlert(alertUnknownCA)
   359  		c.Close()
   360  	}()
   361  
   362  	err := Server(s, testConfig).Handshake()
   363  	s.Close()
   364  	var opErr *net.OpError
   365  	if !errors.As(err, &opErr) || opErr.Err != error(alertUnknownCA) {
   366  		t.Errorf("Got error: %s; expected: %s", err, error(alertUnknownCA))
   367  	}
   368  }
   369  
   370  func TestClose(t *testing.T) {
   371  	c, s := localPipe(t)
   372  	go c.Close()
   373  
   374  	err := Server(s, testConfig).Handshake()
   375  	s.Close()
   376  	if err != io.EOF {
   377  		t.Errorf("Got error: %s; expected: %s", err, io.EOF)
   378  	}
   379  }
   380  
   381  func TestVersion(t *testing.T) {
   382  	serverConfig := &Config{
   383  		Certificates: testConfig.Certificates,
   384  		MaxVersion:   VersionTLS11,
   385  	}
   386  	clientConfig := &Config{
   387  		InsecureSkipVerify: true,
   388  		MinVersion:         VersionTLS10,
   389  	}
   390  	state, _, err := testHandshake(t, clientConfig, serverConfig)
   391  	if err != nil {
   392  		t.Fatalf("handshake failed: %s", err)
   393  	}
   394  	if state.Version != VersionTLS11 {
   395  		t.Fatalf("incorrect version %x, should be %x", state.Version, VersionTLS11)
   396  	}
   397  
   398  	clientConfig.MinVersion = 0
   399  	_, _, err = testHandshake(t, clientConfig, serverConfig)
   400  	if err == nil {
   401  		t.Fatalf("expected failure to connect with TLS 1.0/1.1")
   402  	}
   403  
   404  	defer func(old bool) { debugEnableTLS10 = old }(debugEnableTLS10)
   405  	debugEnableTLS10 = true
   406  	_, _, err = testHandshake(t, clientConfig, serverConfig)
   407  	if err != nil {
   408  		t.Fatalf("handshake failed: %s", err)
   409  	}
   410  	if state.Version != VersionTLS11 {
   411  		t.Fatalf("incorrect version %x, should be %x", state.Version, VersionTLS11)
   412  	}
   413  }
   414  
   415  func TestCipherSuitePreference(t *testing.T) {
   416  	serverConfig := &Config{
   417  		CipherSuites: []uint16{TLS_RSA_WITH_RC4_128_SHA, TLS_AES_128_GCM_SHA256,
   418  			TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256},
   419  		Certificates: testConfig.Certificates,
   420  		MaxVersion:   VersionTLS12,
   421  		GetConfigForClient: func(chi *ClientHelloInfo) (*Config, error) {
   422  			if chi.CipherSuites[0] != TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 {
   423  				t.Error("the advertised order should not depend on Config.CipherSuites")
   424  			}
   425  			if len(chi.CipherSuites) != 2+len(defaultCipherSuitesTLS13) {
   426  				t.Error("the advertised TLS 1.2 suites should be filtered by Config.CipherSuites")
   427  			}
   428  			return nil, nil
   429  		},
   430  	}
   431  	clientConfig := &Config{
   432  		CipherSuites:       []uint16{TLS_RSA_WITH_AES_128_CBC_SHA, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256},
   433  		InsecureSkipVerify: true,
   434  	}
   435  	state, _, err := testHandshake(t, clientConfig, serverConfig)
   436  	if err != nil {
   437  		t.Fatalf("handshake failed: %s", err)
   438  	}
   439  	if state.CipherSuite != TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256 {
   440  		t.Error("the preference order should not depend on Config.CipherSuites")
   441  	}
   442  }
   443  
   444  func TestSCTHandshake(t *testing.T) {
   445  	t.Run("TLSv12", func(t *testing.T) { testSCTHandshake(t, VersionTLS12) })
   446  	t.Run("TLSv13", func(t *testing.T) { testSCTHandshake(t, VersionTLS13) })
   447  }
   448  
   449  func testSCTHandshake(t *testing.T, version uint16) {
   450  	expected := [][]byte{[]byte("certificate"), []byte("transparency")}
   451  	serverConfig := &Config{
   452  		Certificates: []Certificate{{
   453  			Certificate:                 [][]byte{testRSACertificate},
   454  			PrivateKey:                  testRSAPrivateKey,
   455  			SignedCertificateTimestamps: expected,
   456  		}},
   457  		MaxVersion: version,
   458  	}
   459  	clientConfig := &Config{
   460  		InsecureSkipVerify: true,
   461  	}
   462  	_, state, err := testHandshake(t, clientConfig, serverConfig)
   463  	if err != nil {
   464  		t.Fatalf("handshake failed: %s", err)
   465  	}
   466  	actual := state.SignedCertificateTimestamps
   467  	if len(actual) != len(expected) {
   468  		t.Fatalf("got %d scts, want %d", len(actual), len(expected))
   469  	}
   470  	for i, sct := range expected {
   471  		if !bytes.Equal(sct, actual[i]) {
   472  			t.Fatalf("SCT #%d was %x, but expected %x", i, actual[i], sct)
   473  		}
   474  	}
   475  }
   476  
   477  func TestCrossVersionResume(t *testing.T) {
   478  	t.Run("TLSv12", func(t *testing.T) { testCrossVersionResume(t, VersionTLS12) })
   479  	t.Run("TLSv13", func(t *testing.T) { testCrossVersionResume(t, VersionTLS13) })
   480  }
   481  
   482  func testCrossVersionResume(t *testing.T, version uint16) {
   483  	serverConfig := &Config{
   484  		CipherSuites: []uint16{TLS_RSA_WITH_AES_128_CBC_SHA},
   485  		Certificates: testConfig.Certificates,
   486  	}
   487  	clientConfig := &Config{
   488  		CipherSuites:       []uint16{TLS_RSA_WITH_AES_128_CBC_SHA},
   489  		InsecureSkipVerify: true,
   490  		ClientSessionCache: NewLRUClientSessionCache(1),
   491  		ServerName:         "servername",
   492  		MinVersion:         VersionTLS10,
   493  	}
   494  
   495  	// Establish a session at TLS 1.1.
   496  	clientConfig.MaxVersion = VersionTLS11
   497  	_, _, err := testHandshake(t, clientConfig, serverConfig)
   498  	if err != nil {
   499  		t.Fatalf("handshake failed: %s", err)
   500  	}
   501  
   502  	// The client session cache now contains a TLS 1.1 session.
   503  	state, _, err := testHandshake(t, clientConfig, serverConfig)
   504  	if err != nil {
   505  		t.Fatalf("handshake failed: %s", err)
   506  	}
   507  	if !state.DidResume {
   508  		t.Fatalf("handshake did not resume at the same version")
   509  	}
   510  
   511  	// Test that the server will decline to resume at a lower version.
   512  	clientConfig.MaxVersion = VersionTLS10
   513  	state, _, err = testHandshake(t, clientConfig, serverConfig)
   514  	if err != nil {
   515  		t.Fatalf("handshake failed: %s", err)
   516  	}
   517  	if state.DidResume {
   518  		t.Fatalf("handshake resumed at a lower version")
   519  	}
   520  
   521  	// The client session cache now contains a TLS 1.0 session.
   522  	state, _, err = testHandshake(t, clientConfig, serverConfig)
   523  	if err != nil {
   524  		t.Fatalf("handshake failed: %s", err)
   525  	}
   526  	if !state.DidResume {
   527  		t.Fatalf("handshake did not resume at the same version")
   528  	}
   529  
   530  	// Test that the server will decline to resume at a higher version.
   531  	clientConfig.MaxVersion = VersionTLS11
   532  	state, _, err = testHandshake(t, clientConfig, serverConfig)
   533  	if err != nil {
   534  		t.Fatalf("handshake failed: %s", err)
   535  	}
   536  	if state.DidResume {
   537  		t.Fatalf("handshake resumed at a higher version")
   538  	}
   539  }
   540  
   541  // Note: see comment in handshake_test.go for details of how the reference
   542  // tests work.
   543  
   544  // serverTest represents a test of the TLS server handshake against a reference
   545  // implementation.
   546  type serverTest struct {
   547  	// name is a freeform string identifying the test and the file in which
   548  	// the expected results will be stored.
   549  	name string
   550  	// command, if not empty, contains a series of arguments for the
   551  	// command to run for the reference server.
   552  	command []string
   553  	// expectedPeerCerts contains a list of PEM blocks of expected
   554  	// certificates from the client.
   555  	expectedPeerCerts []string
   556  	// config, if not nil, contains a custom Config to use for this test.
   557  	config *Config
   558  	// expectHandshakeErrorIncluding, when not empty, contains a string
   559  	// that must be a substring of the error resulting from the handshake.
   560  	expectHandshakeErrorIncluding string
   561  	// validate, if not nil, is a function that will be called with the
   562  	// ConnectionState of the resulting connection. It returns false if the
   563  	// ConnectionState is unacceptable.
   564  	validate func(ConnectionState) error
   565  	// wait, if true, prevents this subtest from calling t.Parallel.
   566  	// If false, runServerTest* returns immediately.
   567  	wait bool
   568  }
   569  
   570  var defaultClientCommand = []string{"openssl", "s_client", "-no_ticket"}
   571  
   572  // connFromCommand starts opens a listening socket and starts the reference
   573  // client to connect to it. It returns a recordingConn that wraps the resulting
   574  // connection.
   575  func (test *serverTest) connFromCommand() (conn *recordingConn, child *exec.Cmd, err error) {
   576  	l, err := net.ListenTCP("tcp", &net.TCPAddr{
   577  		IP:   net.IPv4(127, 0, 0, 1),
   578  		Port: 0,
   579  	})
   580  	if err != nil {
   581  		return nil, nil, err
   582  	}
   583  	defer l.Close()
   584  
   585  	port := l.Addr().(*net.TCPAddr).Port
   586  
   587  	var command []string
   588  	command = append(command, test.command...)
   589  	if len(command) == 0 {
   590  		command = defaultClientCommand
   591  	}
   592  	command = append(command, "-connect")
   593  	command = append(command, fmt.Sprintf("127.0.0.1:%d", port))
   594  	cmd := exec.Command(command[0], command[1:]...)
   595  	cmd.Stdin = nil
   596  	var output bytes.Buffer
   597  	cmd.Stdout = &output
   598  	cmd.Stderr = &output
   599  	if err := cmd.Start(); err != nil {
   600  		return nil, nil, err
   601  	}
   602  
   603  	connChan := make(chan any, 1)
   604  	go func() {
   605  		tcpConn, err := l.Accept()
   606  		if err != nil {
   607  			connChan <- err
   608  			return
   609  		}
   610  		connChan <- tcpConn
   611  	}()
   612  
   613  	var tcpConn net.Conn
   614  	select {
   615  	case connOrError := <-connChan:
   616  		if err, ok := connOrError.(error); ok {
   617  			return nil, nil, err
   618  		}
   619  		tcpConn = connOrError.(net.Conn)
   620  	case <-time.After(2 * time.Second):
   621  		return nil, nil, errors.New("timed out waiting for connection from child process")
   622  	}
   623  
   624  	record := &recordingConn{
   625  		Conn: tcpConn,
   626  	}
   627  
   628  	return record, cmd, nil
   629  }
   630  
   631  func (test *serverTest) dataPath() string {
   632  	return filepath.Join("testdata", "Server-"+test.name)
   633  }
   634  
   635  func (test *serverTest) loadData() (flows [][]byte, err error) {
   636  	in, err := os.Open(test.dataPath())
   637  	if err != nil {
   638  		return nil, err
   639  	}
   640  	defer in.Close()
   641  	return parseTestData(in)
   642  }
   643  
   644  func (test *serverTest) run(t *testing.T, write bool) {
   645  	var clientConn, serverConn net.Conn
   646  	var recordingConn *recordingConn
   647  	var childProcess *exec.Cmd
   648  
   649  	if write {
   650  		var err error
   651  		recordingConn, childProcess, err = test.connFromCommand()
   652  		if err != nil {
   653  			t.Fatalf("Failed to start subcommand: %s", err)
   654  		}
   655  		serverConn = recordingConn
   656  		defer func() {
   657  			if t.Failed() {
   658  				t.Logf("OpenSSL output:\n\n%s", childProcess.Stdout)
   659  			}
   660  		}()
   661  	} else {
   662  		clientConn, serverConn = localPipe(t)
   663  	}
   664  	config := test.config
   665  	if config == nil {
   666  		config = testConfig
   667  	}
   668  	server := Server(serverConn, config)
   669  	connStateChan := make(chan ConnectionState, 1)
   670  	go func() {
   671  		_, err := server.Write([]byte("hello, world\n"))
   672  		if len(test.expectHandshakeErrorIncluding) > 0 {
   673  			if err == nil {
   674  				t.Errorf("Error expected, but no error returned")
   675  			} else if s := err.Error(); !strings.Contains(s, test.expectHandshakeErrorIncluding) {
   676  				t.Errorf("Error expected containing '%s' but got '%s'", test.expectHandshakeErrorIncluding, s)
   677  			}
   678  		} else {
   679  			if err != nil {
   680  				t.Logf("Error from Server.Write: '%s'", err)
   681  			}
   682  		}
   683  		server.Close()
   684  		serverConn.Close()
   685  		connStateChan <- server.ConnectionState()
   686  	}()
   687  
   688  	if !write {
   689  		flows, err := test.loadData()
   690  		if err != nil {
   691  			t.Fatalf("%s: failed to load data from %s", test.name, test.dataPath())
   692  		}
   693  		for i, b := range flows {
   694  			if i%2 == 0 {
   695  				if *fast {
   696  					clientConn.SetWriteDeadline(time.Now().Add(1 * time.Second))
   697  				} else {
   698  					clientConn.SetWriteDeadline(time.Now().Add(1 * time.Minute))
   699  				}
   700  				clientConn.Write(b)
   701  				continue
   702  			}
   703  			bb := make([]byte, len(b))
   704  			if *fast {
   705  				clientConn.SetReadDeadline(time.Now().Add(1 * time.Second))
   706  			} else {
   707  				clientConn.SetReadDeadline(time.Now().Add(1 * time.Minute))
   708  			}
   709  			n, err := io.ReadFull(clientConn, bb)
   710  			if err != nil {
   711  				t.Fatalf("%s #%d: %s\nRead %d, wanted %d, got %x, wanted %x\n", test.name, i+1, err, n, len(bb), bb[:n], b)
   712  			}
   713  			if !bytes.Equal(b, bb) {
   714  				t.Fatalf("%s #%d: mismatch on read: got:%x want:%x", test.name, i+1, bb, b)
   715  			}
   716  		}
   717  		clientConn.Close()
   718  	}
   719  
   720  	connState := <-connStateChan
   721  	peerCerts := connState.PeerCertificates
   722  	if len(peerCerts) == len(test.expectedPeerCerts) {
   723  		for i, peerCert := range peerCerts {
   724  			block, _ := pem.Decode([]byte(test.expectedPeerCerts[i]))
   725  			if !bytes.Equal(block.Bytes, peerCert.Raw) {
   726  				t.Fatalf("%s: mismatch on peer cert %d", test.name, i+1)
   727  			}
   728  		}
   729  	} else {
   730  		t.Fatalf("%s: mismatch on peer list length: %d (wanted) != %d (got)", test.name, len(test.expectedPeerCerts), len(peerCerts))
   731  	}
   732  
   733  	if test.validate != nil {
   734  		if err := test.validate(connState); err != nil {
   735  			t.Fatalf("validate callback returned error: %s", err)
   736  		}
   737  	}
   738  
   739  	if write {
   740  		path := test.dataPath()
   741  		out, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
   742  		if err != nil {
   743  			t.Fatalf("Failed to create output file: %s", err)
   744  		}
   745  		defer out.Close()
   746  		recordingConn.Close()
   747  		if len(recordingConn.flows) < 3 {
   748  			if len(test.expectHandshakeErrorIncluding) == 0 {
   749  				t.Fatalf("Handshake failed")
   750  			}
   751  		}
   752  		recordingConn.WriteTo(out)
   753  		t.Logf("Wrote %s\n", path)
   754  		childProcess.Wait()
   755  	}
   756  }
   757  
   758  func runServerTestForVersion(t *testing.T, template *serverTest, version, option string) {
   759  	// Make a deep copy of the template before going parallel.
   760  	test := *template
   761  	if template.config != nil {
   762  		test.config = template.config.Clone()
   763  	}
   764  	test.name = version + "-" + test.name
   765  	if len(test.command) == 0 {
   766  		test.command = defaultClientCommand
   767  	}
   768  	test.command = append([]string(nil), test.command...)
   769  	test.command = append(test.command, option)
   770  
   771  	runTestAndUpdateIfNeeded(t, version, test.run, test.wait)
   772  }
   773  
   774  func runServerTestTLS10(t *testing.T, template *serverTest) {
   775  	runServerTestForVersion(t, template, "TLSv10", "-tls1")
   776  }
   777  
   778  func runServerTestTLS11(t *testing.T, template *serverTest) {
   779  	runServerTestForVersion(t, template, "TLSv11", "-tls1_1")
   780  }
   781  
   782  func runServerTestTLS12(t *testing.T, template *serverTest) {
   783  	runServerTestForVersion(t, template, "TLSv12", "-tls1_2")
   784  }
   785  
   786  func runServerTestTLS13(t *testing.T, template *serverTest) {
   787  	runServerTestForVersion(t, template, "TLSv13", "-tls1_3")
   788  }
   789  
   790  func TestHandshakeServerRSARC4(t *testing.T) {
   791  	test := &serverTest{
   792  		name:    "RSA-RC4",
   793  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "RC4-SHA"},
   794  	}
   795  	runServerTestTLS10(t, test)
   796  	runServerTestTLS11(t, test)
   797  	runServerTestTLS12(t, test)
   798  }
   799  
   800  func TestHandshakeServerRSA3DES(t *testing.T) {
   801  	test := &serverTest{
   802  		name:    "RSA-3DES",
   803  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "DES-CBC3-SHA"},
   804  	}
   805  	runServerTestTLS10(t, test)
   806  	runServerTestTLS12(t, test)
   807  }
   808  
   809  func TestHandshakeServerRSAAES(t *testing.T) {
   810  	test := &serverTest{
   811  		name:    "RSA-AES",
   812  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "AES128-SHA"},
   813  	}
   814  	runServerTestTLS10(t, test)
   815  	runServerTestTLS12(t, test)
   816  }
   817  
   818  func TestHandshakeServerAESGCM(t *testing.T) {
   819  	test := &serverTest{
   820  		name:    "RSA-AES-GCM",
   821  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "ECDHE-RSA-AES128-GCM-SHA256"},
   822  	}
   823  	runServerTestTLS12(t, test)
   824  }
   825  
   826  func TestHandshakeServerAES256GCMSHA384(t *testing.T) {
   827  	test := &serverTest{
   828  		name:    "RSA-AES256-GCM-SHA384",
   829  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "ECDHE-RSA-AES256-GCM-SHA384"},
   830  	}
   831  	runServerTestTLS12(t, test)
   832  }
   833  
   834  func TestHandshakeServerAES128SHA256(t *testing.T) {
   835  	test := &serverTest{
   836  		name:    "AES128-SHA256",
   837  		command: []string{"openssl", "s_client", "-no_ticket", "-ciphersuites", "TLS_AES_128_GCM_SHA256"},
   838  	}
   839  	runServerTestTLS13(t, test)
   840  }
   841  func TestHandshakeServerAES256SHA384(t *testing.T) {
   842  	test := &serverTest{
   843  		name:    "AES256-SHA384",
   844  		command: []string{"openssl", "s_client", "-no_ticket", "-ciphersuites", "TLS_AES_256_GCM_SHA384"},
   845  	}
   846  	runServerTestTLS13(t, test)
   847  }
   848  func TestHandshakeServerCHACHA20SHA256(t *testing.T) {
   849  	test := &serverTest{
   850  		name:    "CHACHA20-SHA256",
   851  		command: []string{"openssl", "s_client", "-no_ticket", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256"},
   852  	}
   853  	runServerTestTLS13(t, test)
   854  }
   855  
   856  func TestHandshakeServerECDHEECDSAAES(t *testing.T) {
   857  	config := testConfig.Clone()
   858  	config.Certificates = make([]Certificate, 1)
   859  	config.Certificates[0].Certificate = [][]byte{testECDSACertificate}
   860  	config.Certificates[0].PrivateKey = testECDSAPrivateKey
   861  	config.BuildNameToCertificate()
   862  
   863  	test := &serverTest{
   864  		name:    "ECDHE-ECDSA-AES",
   865  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "ECDHE-ECDSA-AES256-SHA", "-ciphersuites", "TLS_AES_128_GCM_SHA256"},
   866  		config:  config,
   867  	}
   868  	runServerTestTLS10(t, test)
   869  	runServerTestTLS12(t, test)
   870  	runServerTestTLS13(t, test)
   871  }
   872  
   873  func TestHandshakeServerX25519(t *testing.T) {
   874  	config := testConfig.Clone()
   875  	config.CurvePreferences = []CurveID{X25519}
   876  
   877  	test := &serverTest{
   878  		name:    "X25519",
   879  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "ECDHE-RSA-CHACHA20-POLY1305", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256", "-curves", "X25519"},
   880  		config:  config,
   881  	}
   882  	runServerTestTLS12(t, test)
   883  	runServerTestTLS13(t, test)
   884  }
   885  
   886  func TestHandshakeServerP256(t *testing.T) {
   887  	config := testConfig.Clone()
   888  	config.CurvePreferences = []CurveID{CurveP256}
   889  
   890  	test := &serverTest{
   891  		name:    "P256",
   892  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "ECDHE-RSA-CHACHA20-POLY1305", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256", "-curves", "P-256"},
   893  		config:  config,
   894  	}
   895  	runServerTestTLS12(t, test)
   896  	runServerTestTLS13(t, test)
   897  }
   898  
   899  func TestHandshakeServerHelloRetryRequest(t *testing.T) {
   900  	config := testConfig.Clone()
   901  	config.CurvePreferences = []CurveID{CurveP256}
   902  
   903  	test := &serverTest{
   904  		name:    "HelloRetryRequest",
   905  		command: []string{"openssl", "s_client", "-no_ticket", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256", "-curves", "X25519:P-256"},
   906  		config:  config,
   907  	}
   908  	runServerTestTLS13(t, test)
   909  }
   910  
   911  func TestHandshakeServerALPN(t *testing.T) {
   912  	config := testConfig.Clone()
   913  	config.NextProtos = []string{"proto1", "proto2"}
   914  
   915  	test := &serverTest{
   916  		name: "ALPN",
   917  		// Note that this needs OpenSSL 1.0.2 because that is the first
   918  		// version that supports the -alpn flag.
   919  		command: []string{"openssl", "s_client", "-alpn", "proto2,proto1", "-cipher", "ECDHE-RSA-CHACHA20-POLY1305", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256"},
   920  		config:  config,
   921  		validate: func(state ConnectionState) error {
   922  			// The server's preferences should override the client.
   923  			if state.NegotiatedProtocol != "proto1" {
   924  				return fmt.Errorf("Got protocol %q, wanted proto1", state.NegotiatedProtocol)
   925  			}
   926  			return nil
   927  		},
   928  	}
   929  	runServerTestTLS12(t, test)
   930  	runServerTestTLS13(t, test)
   931  }
   932  
   933  func TestHandshakeServerALPNNoMatch(t *testing.T) {
   934  	config := testConfig.Clone()
   935  	config.NextProtos = []string{"proto3"}
   936  
   937  	test := &serverTest{
   938  		name: "ALPN-NoMatch",
   939  		// Note that this needs OpenSSL 1.0.2 because that is the first
   940  		// version that supports the -alpn flag.
   941  		command:                       []string{"openssl", "s_client", "-alpn", "proto2,proto1", "-cipher", "ECDHE-RSA-CHACHA20-POLY1305", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256"},
   942  		config:                        config,
   943  		expectHandshakeErrorIncluding: "client requested unsupported application protocol",
   944  	}
   945  	runServerTestTLS12(t, test)
   946  	runServerTestTLS13(t, test)
   947  }
   948  
   949  func TestHandshakeServerALPNNotConfigured(t *testing.T) {
   950  	config := testConfig.Clone()
   951  	config.NextProtos = nil
   952  
   953  	test := &serverTest{
   954  		name: "ALPN-NotConfigured",
   955  		// Note that this needs OpenSSL 1.0.2 because that is the first
   956  		// version that supports the -alpn flag.
   957  		command: []string{"openssl", "s_client", "-alpn", "proto2,proto1", "-cipher", "ECDHE-RSA-CHACHA20-POLY1305", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256"},
   958  		config:  config,
   959  		validate: func(state ConnectionState) error {
   960  			if state.NegotiatedProtocol != "" {
   961  				return fmt.Errorf("Got protocol %q, wanted nothing", state.NegotiatedProtocol)
   962  			}
   963  			return nil
   964  		},
   965  	}
   966  	runServerTestTLS12(t, test)
   967  	runServerTestTLS13(t, test)
   968  }
   969  
   970  func TestHandshakeServerALPNFallback(t *testing.T) {
   971  	config := testConfig.Clone()
   972  	config.NextProtos = []string{"proto1", "h2", "proto2"}
   973  
   974  	test := &serverTest{
   975  		name: "ALPN-Fallback",
   976  		// Note that this needs OpenSSL 1.0.2 because that is the first
   977  		// version that supports the -alpn flag.
   978  		command: []string{"openssl", "s_client", "-alpn", "proto3,http/1.1,proto4", "-cipher", "ECDHE-RSA-CHACHA20-POLY1305", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256"},
   979  		config:  config,
   980  		validate: func(state ConnectionState) error {
   981  			if state.NegotiatedProtocol != "" {
   982  				return fmt.Errorf("Got protocol %q, wanted nothing", state.NegotiatedProtocol)
   983  			}
   984  			return nil
   985  		},
   986  	}
   987  	runServerTestTLS12(t, test)
   988  	runServerTestTLS13(t, test)
   989  }
   990  
   991  // TestHandshakeServerSNI involves a client sending an SNI extension of
   992  // "snitest.com", which happens to match the CN of testSNICertificate. The test
   993  // verifies that the server correctly selects that certificate.
   994  func TestHandshakeServerSNI(t *testing.T) {
   995  	test := &serverTest{
   996  		name:    "SNI",
   997  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "AES128-SHA", "-servername", "snitest.com"},
   998  	}
   999  	runServerTestTLS12(t, test)
  1000  }
  1001  
  1002  // TestHandshakeServerSNICertForName is similar to TestHandshakeServerSNI, but
  1003  // tests the dynamic GetCertificate method
  1004  func TestHandshakeServerSNIGetCertificate(t *testing.T) {
  1005  	config := testConfig.Clone()
  1006  
  1007  	// Replace the NameToCertificate map with a GetCertificate function
  1008  	nameToCert := config.NameToCertificate
  1009  	config.NameToCertificate = nil
  1010  	config.GetCertificate = func(clientHello *ClientHelloInfo) (*Certificate, error) {
  1011  		cert := nameToCert[clientHello.ServerName]
  1012  		return cert, nil
  1013  	}
  1014  	test := &serverTest{
  1015  		name:    "SNI-GetCertificate",
  1016  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "AES128-SHA", "-servername", "snitest.com"},
  1017  		config:  config,
  1018  	}
  1019  	runServerTestTLS12(t, test)
  1020  }
  1021  
  1022  // TestHandshakeServerSNICertForNameNotFound is similar to
  1023  // TestHandshakeServerSNICertForName, but tests to make sure that when the
  1024  // GetCertificate method doesn't return a cert, we fall back to what's in
  1025  // the NameToCertificate map.
  1026  func TestHandshakeServerSNIGetCertificateNotFound(t *testing.T) {
  1027  	config := testConfig.Clone()
  1028  
  1029  	config.GetCertificate = func(clientHello *ClientHelloInfo) (*Certificate, error) {
  1030  		return nil, nil
  1031  	}
  1032  	test := &serverTest{
  1033  		name:    "SNI-GetCertificateNotFound",
  1034  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "AES128-SHA", "-servername", "snitest.com"},
  1035  		config:  config,
  1036  	}
  1037  	runServerTestTLS12(t, test)
  1038  }
  1039  
  1040  // TestHandshakeServerSNICertForNameError tests to make sure that errors in
  1041  // GetCertificate result in a tls alert.
  1042  func TestHandshakeServerSNIGetCertificateError(t *testing.T) {
  1043  	const errMsg = "TestHandshakeServerSNIGetCertificateError error"
  1044  
  1045  	serverConfig := testConfig.Clone()
  1046  	serverConfig.GetCertificate = func(clientHello *ClientHelloInfo) (*Certificate, error) {
  1047  		return nil, errors.New(errMsg)
  1048  	}
  1049  
  1050  	clientHello := &clientHelloMsg{
  1051  		vers:               VersionTLS10,
  1052  		random:             make([]byte, 32),
  1053  		cipherSuites:       []uint16{TLS_RSA_WITH_RC4_128_SHA},
  1054  		compressionMethods: []uint8{compressionNone},
  1055  		serverName:         "test",
  1056  	}
  1057  	testClientHelloFailure(t, serverConfig, clientHello, errMsg)
  1058  }
  1059  
  1060  // TestHandshakeServerEmptyCertificates tests that GetCertificates is called in
  1061  // the case that Certificates is empty, even without SNI.
  1062  func TestHandshakeServerEmptyCertificates(t *testing.T) {
  1063  	const errMsg = "TestHandshakeServerEmptyCertificates error"
  1064  
  1065  	serverConfig := testConfig.Clone()
  1066  	serverConfig.GetCertificate = func(clientHello *ClientHelloInfo) (*Certificate, error) {
  1067  		return nil, errors.New(errMsg)
  1068  	}
  1069  	serverConfig.Certificates = nil
  1070  
  1071  	clientHello := &clientHelloMsg{
  1072  		vers:               VersionTLS10,
  1073  		random:             make([]byte, 32),
  1074  		cipherSuites:       []uint16{TLS_RSA_WITH_RC4_128_SHA},
  1075  		compressionMethods: []uint8{compressionNone},
  1076  	}
  1077  	testClientHelloFailure(t, serverConfig, clientHello, errMsg)
  1078  
  1079  	// With an empty Certificates and a nil GetCertificate, the server
  1080  	// should always return a “no certificates” error.
  1081  	serverConfig.GetCertificate = nil
  1082  
  1083  	clientHello = &clientHelloMsg{
  1084  		vers:               VersionTLS10,
  1085  		random:             make([]byte, 32),
  1086  		cipherSuites:       []uint16{TLS_RSA_WITH_RC4_128_SHA},
  1087  		compressionMethods: []uint8{compressionNone},
  1088  	}
  1089  	testClientHelloFailure(t, serverConfig, clientHello, "no certificates")
  1090  }
  1091  
  1092  func TestServerResumption(t *testing.T) {
  1093  	sessionFilePath := tempFile("")
  1094  	defer os.Remove(sessionFilePath)
  1095  
  1096  	testIssue := &serverTest{
  1097  		name:    "IssueTicket",
  1098  		command: []string{"openssl", "s_client", "-cipher", "AES128-SHA", "-ciphersuites", "TLS_AES_128_GCM_SHA256", "-sess_out", sessionFilePath},
  1099  		wait:    true,
  1100  	}
  1101  	testResume := &serverTest{
  1102  		name:    "Resume",
  1103  		command: []string{"openssl", "s_client", "-cipher", "AES128-SHA", "-ciphersuites", "TLS_AES_128_GCM_SHA256", "-sess_in", sessionFilePath},
  1104  		validate: func(state ConnectionState) error {
  1105  			if !state.DidResume {
  1106  				return errors.New("did not resume")
  1107  			}
  1108  			return nil
  1109  		},
  1110  	}
  1111  
  1112  	runServerTestTLS12(t, testIssue)
  1113  	runServerTestTLS12(t, testResume)
  1114  
  1115  	runServerTestTLS13(t, testIssue)
  1116  	runServerTestTLS13(t, testResume)
  1117  
  1118  	config := testConfig.Clone()
  1119  	config.CurvePreferences = []CurveID{CurveP256}
  1120  
  1121  	testResumeHRR := &serverTest{
  1122  		name: "Resume-HelloRetryRequest",
  1123  		command: []string{"openssl", "s_client", "-curves", "X25519:P-256", "-cipher", "AES128-SHA", "-ciphersuites",
  1124  			"TLS_AES_128_GCM_SHA256", "-sess_in", sessionFilePath},
  1125  		config: config,
  1126  		validate: func(state ConnectionState) error {
  1127  			if !state.DidResume {
  1128  				return errors.New("did not resume")
  1129  			}
  1130  			return nil
  1131  		},
  1132  	}
  1133  
  1134  	runServerTestTLS13(t, testResumeHRR)
  1135  }
  1136  
  1137  func TestServerResumptionDisabled(t *testing.T) {
  1138  	sessionFilePath := tempFile("")
  1139  	defer os.Remove(sessionFilePath)
  1140  
  1141  	config := testConfig.Clone()
  1142  
  1143  	testIssue := &serverTest{
  1144  		name:    "IssueTicketPreDisable",
  1145  		command: []string{"openssl", "s_client", "-cipher", "AES128-SHA", "-ciphersuites", "TLS_AES_128_GCM_SHA256", "-sess_out", sessionFilePath},
  1146  		config:  config,
  1147  		wait:    true,
  1148  	}
  1149  	testResume := &serverTest{
  1150  		name:    "ResumeDisabled",
  1151  		command: []string{"openssl", "s_client", "-cipher", "AES128-SHA", "-ciphersuites", "TLS_AES_128_GCM_SHA256", "-sess_in", sessionFilePath},
  1152  		config:  config,
  1153  		validate: func(state ConnectionState) error {
  1154  			if state.DidResume {
  1155  				return errors.New("resumed with SessionTicketsDisabled")
  1156  			}
  1157  			return nil
  1158  		},
  1159  	}
  1160  
  1161  	config.SessionTicketsDisabled = false
  1162  	runServerTestTLS12(t, testIssue)
  1163  	config.SessionTicketsDisabled = true
  1164  	runServerTestTLS12(t, testResume)
  1165  
  1166  	config.SessionTicketsDisabled = false
  1167  	runServerTestTLS13(t, testIssue)
  1168  	config.SessionTicketsDisabled = true
  1169  	runServerTestTLS13(t, testResume)
  1170  }
  1171  
  1172  func TestFallbackSCSV(t *testing.T) {
  1173  	serverConfig := Config{
  1174  		Certificates: testConfig.Certificates,
  1175  	}
  1176  	test := &serverTest{
  1177  		name:   "FallbackSCSV",
  1178  		config: &serverConfig,
  1179  		// OpenSSL 1.0.1j is needed for the -fallback_scsv option.
  1180  		command:                       []string{"openssl", "s_client", "-fallback_scsv"},
  1181  		expectHandshakeErrorIncluding: "inappropriate protocol fallback",
  1182  	}
  1183  	runServerTestTLS11(t, test)
  1184  }
  1185  
  1186  func TestHandshakeServerExportKeyingMaterial(t *testing.T) {
  1187  	test := &serverTest{
  1188  		name:    "ExportKeyingMaterial",
  1189  		command: []string{"openssl", "s_client", "-cipher", "ECDHE-RSA-AES256-SHA", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256"},
  1190  		config:  testConfig.Clone(),
  1191  		validate: func(state ConnectionState) error {
  1192  			if km, err := state.ExportKeyingMaterial("test", nil, 42); err != nil {
  1193  				return fmt.Errorf("ExportKeyingMaterial failed: %v", err)
  1194  			} else if len(km) != 42 {
  1195  				return fmt.Errorf("Got %d bytes from ExportKeyingMaterial, wanted %d", len(km), 42)
  1196  			}
  1197  			return nil
  1198  		},
  1199  	}
  1200  	runServerTestTLS10(t, test)
  1201  	runServerTestTLS12(t, test)
  1202  	runServerTestTLS13(t, test)
  1203  }
  1204  
  1205  func TestHandshakeServerRSAPKCS1v15(t *testing.T) {
  1206  	test := &serverTest{
  1207  		name:    "RSA-RSAPKCS1v15",
  1208  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "ECDHE-RSA-CHACHA20-POLY1305", "-sigalgs", "rsa_pkcs1_sha256"},
  1209  	}
  1210  	runServerTestTLS12(t, test)
  1211  }
  1212  
  1213  func TestHandshakeServerRSAPSS(t *testing.T) {
  1214  	// We send rsa_pss_rsae_sha512 first, as the test key won't fit, and we
  1215  	// verify the server implementation will disregard the client preference in
  1216  	// that case. See Issue 29793.
  1217  	test := &serverTest{
  1218  		name:    "RSA-RSAPSS",
  1219  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "ECDHE-RSA-CHACHA20-POLY1305", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256", "-sigalgs", "rsa_pss_rsae_sha512:rsa_pss_rsae_sha256"},
  1220  	}
  1221  	runServerTestTLS12(t, test)
  1222  	runServerTestTLS13(t, test)
  1223  
  1224  	test = &serverTest{
  1225  		name:                          "RSA-RSAPSS-TooSmall",
  1226  		command:                       []string{"openssl", "s_client", "-no_ticket", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256", "-sigalgs", "rsa_pss_rsae_sha512"},
  1227  		expectHandshakeErrorIncluding: "peer doesn't support any of the certificate's signature algorithms",
  1228  	}
  1229  	runServerTestTLS13(t, test)
  1230  }
  1231  
  1232  func TestHandshakeServerEd25519(t *testing.T) {
  1233  	config := testConfig.Clone()
  1234  	config.Certificates = make([]Certificate, 1)
  1235  	config.Certificates[0].Certificate = [][]byte{testEd25519Certificate}
  1236  	config.Certificates[0].PrivateKey = testEd25519PrivateKey
  1237  	config.BuildNameToCertificate()
  1238  
  1239  	test := &serverTest{
  1240  		name:    "Ed25519",
  1241  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "ECDHE-ECDSA-CHACHA20-POLY1305", "-ciphersuites", "TLS_CHACHA20_POLY1305_SHA256"},
  1242  		config:  config,
  1243  	}
  1244  	runServerTestTLS12(t, test)
  1245  	runServerTestTLS13(t, test)
  1246  }
  1247  
  1248  func benchmarkHandshakeServer(b *testing.B, version uint16, cipherSuite uint16, curve CurveID, cert []byte, key crypto.PrivateKey) {
  1249  	config := testConfig.Clone()
  1250  	config.CipherSuites = []uint16{cipherSuite}
  1251  	config.CurvePreferences = []CurveID{curve}
  1252  	config.Certificates = make([]Certificate, 1)
  1253  	config.Certificates[0].Certificate = [][]byte{cert}
  1254  	config.Certificates[0].PrivateKey = key
  1255  	config.BuildNameToCertificate()
  1256  
  1257  	clientConn, serverConn := localPipe(b)
  1258  	serverConn = &recordingConn{Conn: serverConn}
  1259  	go func() {
  1260  		config := testConfig.Clone()
  1261  		config.MaxVersion = version
  1262  		config.CurvePreferences = []CurveID{curve}
  1263  		client := Client(clientConn, config)
  1264  		client.Handshake()
  1265  	}()
  1266  	server := Server(serverConn, config)
  1267  	if err := server.Handshake(); err != nil {
  1268  		b.Fatalf("handshake failed: %v", err)
  1269  	}
  1270  	serverConn.Close()
  1271  	flows := serverConn.(*recordingConn).flows
  1272  
  1273  	feeder := make(chan struct{})
  1274  	clientConn, serverConn = localPipe(b)
  1275  
  1276  	go func() {
  1277  		for range feeder {
  1278  			for i, f := range flows {
  1279  				if i%2 == 0 {
  1280  					clientConn.Write(f)
  1281  					continue
  1282  				}
  1283  				ff := make([]byte, len(f))
  1284  				n, err := io.ReadFull(clientConn, ff)
  1285  				if err != nil {
  1286  					b.Errorf("#%d: %s\nRead %d, wanted %d, got %x, wanted %x\n", i+1, err, n, len(ff), ff[:n], f)
  1287  				}
  1288  				if !bytes.Equal(f, ff) {
  1289  					b.Errorf("#%d: mismatch on read: got:%x want:%x", i+1, ff, f)
  1290  				}
  1291  			}
  1292  		}
  1293  	}()
  1294  
  1295  	b.ResetTimer()
  1296  	for i := 0; i < b.N; i++ {
  1297  		feeder <- struct{}{}
  1298  		server := Server(serverConn, config)
  1299  		if err := server.Handshake(); err != nil {
  1300  			b.Fatalf("handshake failed: %v", err)
  1301  		}
  1302  	}
  1303  	close(feeder)
  1304  }
  1305  
  1306  func BenchmarkHandshakeServer(b *testing.B) {
  1307  	b.Run("RSA", func(b *testing.B) {
  1308  		benchmarkHandshakeServer(b, VersionTLS12, TLS_RSA_WITH_AES_128_GCM_SHA256,
  1309  			0, testRSACertificate, testRSAPrivateKey)
  1310  	})
  1311  	b.Run("ECDHE-P256-RSA", func(b *testing.B) {
  1312  		b.Run("TLSv13", func(b *testing.B) {
  1313  			benchmarkHandshakeServer(b, VersionTLS13, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1314  				CurveP256, testRSACertificate, testRSAPrivateKey)
  1315  		})
  1316  		b.Run("TLSv12", func(b *testing.B) {
  1317  			benchmarkHandshakeServer(b, VersionTLS12, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1318  				CurveP256, testRSACertificate, testRSAPrivateKey)
  1319  		})
  1320  	})
  1321  	b.Run("ECDHE-P256-ECDSA-P256", func(b *testing.B) {
  1322  		b.Run("TLSv13", func(b *testing.B) {
  1323  			benchmarkHandshakeServer(b, VersionTLS13, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
  1324  				CurveP256, testP256Certificate, testP256PrivateKey)
  1325  		})
  1326  		b.Run("TLSv12", func(b *testing.B) {
  1327  			benchmarkHandshakeServer(b, VersionTLS12, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
  1328  				CurveP256, testP256Certificate, testP256PrivateKey)
  1329  		})
  1330  	})
  1331  	b.Run("ECDHE-X25519-ECDSA-P256", func(b *testing.B) {
  1332  		b.Run("TLSv13", func(b *testing.B) {
  1333  			benchmarkHandshakeServer(b, VersionTLS13, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
  1334  				X25519, testP256Certificate, testP256PrivateKey)
  1335  		})
  1336  		b.Run("TLSv12", func(b *testing.B) {
  1337  			benchmarkHandshakeServer(b, VersionTLS12, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
  1338  				X25519, testP256Certificate, testP256PrivateKey)
  1339  		})
  1340  	})
  1341  	b.Run("ECDHE-P521-ECDSA-P521", func(b *testing.B) {
  1342  		if testECDSAPrivateKey.PublicKey.Curve != elliptic.P521() {
  1343  			b.Fatal("test ECDSA key doesn't use curve P-521")
  1344  		}
  1345  		b.Run("TLSv13", func(b *testing.B) {
  1346  			benchmarkHandshakeServer(b, VersionTLS13, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
  1347  				CurveP521, testECDSACertificate, testECDSAPrivateKey)
  1348  		})
  1349  		b.Run("TLSv12", func(b *testing.B) {
  1350  			benchmarkHandshakeServer(b, VersionTLS12, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305,
  1351  				CurveP521, testECDSACertificate, testECDSAPrivateKey)
  1352  		})
  1353  	})
  1354  }
  1355  
  1356  func TestClientAuth(t *testing.T) {
  1357  	var certPath, keyPath, ecdsaCertPath, ecdsaKeyPath, ed25519CertPath, ed25519KeyPath string
  1358  
  1359  	if *update {
  1360  		certPath = tempFile(clientCertificatePEM)
  1361  		defer os.Remove(certPath)
  1362  		keyPath = tempFile(clientKeyPEM)
  1363  		defer os.Remove(keyPath)
  1364  		ecdsaCertPath = tempFile(clientECDSACertificatePEM)
  1365  		defer os.Remove(ecdsaCertPath)
  1366  		ecdsaKeyPath = tempFile(clientECDSAKeyPEM)
  1367  		defer os.Remove(ecdsaKeyPath)
  1368  		ed25519CertPath = tempFile(clientEd25519CertificatePEM)
  1369  		defer os.Remove(ed25519CertPath)
  1370  		ed25519KeyPath = tempFile(clientEd25519KeyPEM)
  1371  		defer os.Remove(ed25519KeyPath)
  1372  	} else {
  1373  		t.Parallel()
  1374  	}
  1375  
  1376  	config := testConfig.Clone()
  1377  	config.ClientAuth = RequestClientCert
  1378  
  1379  	test := &serverTest{
  1380  		name:    "ClientAuthRequestedNotGiven",
  1381  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "AES128-SHA", "-ciphersuites", "TLS_AES_128_GCM_SHA256"},
  1382  		config:  config,
  1383  	}
  1384  	runServerTestTLS12(t, test)
  1385  	runServerTestTLS13(t, test)
  1386  
  1387  	test = &serverTest{
  1388  		name: "ClientAuthRequestedAndGiven",
  1389  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "AES128-SHA", "-ciphersuites", "TLS_AES_128_GCM_SHA256",
  1390  			"-cert", certPath, "-key", keyPath, "-client_sigalgs", "rsa_pss_rsae_sha256"},
  1391  		config:            config,
  1392  		expectedPeerCerts: []string{clientCertificatePEM},
  1393  	}
  1394  	runServerTestTLS12(t, test)
  1395  	runServerTestTLS13(t, test)
  1396  
  1397  	test = &serverTest{
  1398  		name: "ClientAuthRequestedAndECDSAGiven",
  1399  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "AES128-SHA", "-ciphersuites", "TLS_AES_128_GCM_SHA256",
  1400  			"-cert", ecdsaCertPath, "-key", ecdsaKeyPath},
  1401  		config:            config,
  1402  		expectedPeerCerts: []string{clientECDSACertificatePEM},
  1403  	}
  1404  	runServerTestTLS12(t, test)
  1405  	runServerTestTLS13(t, test)
  1406  
  1407  	test = &serverTest{
  1408  		name: "ClientAuthRequestedAndEd25519Given",
  1409  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "AES128-SHA", "-ciphersuites", "TLS_AES_128_GCM_SHA256",
  1410  			"-cert", ed25519CertPath, "-key", ed25519KeyPath},
  1411  		config:            config,
  1412  		expectedPeerCerts: []string{clientEd25519CertificatePEM},
  1413  	}
  1414  	runServerTestTLS12(t, test)
  1415  	runServerTestTLS13(t, test)
  1416  
  1417  	test = &serverTest{
  1418  		name: "ClientAuthRequestedAndPKCS1v15Given",
  1419  		command: []string{"openssl", "s_client", "-no_ticket", "-cipher", "AES128-SHA",
  1420  			"-cert", certPath, "-key", keyPath, "-client_sigalgs", "rsa_pkcs1_sha256"},
  1421  		config:            config,
  1422  		expectedPeerCerts: []string{clientCertificatePEM},
  1423  	}
  1424  	runServerTestTLS12(t, test)
  1425  }
  1426  
  1427  func TestSNIGivenOnFailure(t *testing.T) {
  1428  	const expectedServerName = "test.testing"
  1429  
  1430  	clientHello := &clientHelloMsg{
  1431  		vers:               VersionTLS10,
  1432  		random:             make([]byte, 32),
  1433  		cipherSuites:       []uint16{TLS_RSA_WITH_RC4_128_SHA},
  1434  		compressionMethods: []uint8{compressionNone},
  1435  		serverName:         expectedServerName,
  1436  	}
  1437  
  1438  	serverConfig := testConfig.Clone()
  1439  	// Erase the server's cipher suites to ensure the handshake fails.
  1440  	serverConfig.CipherSuites = nil
  1441  
  1442  	c, s := localPipe(t)
  1443  	go func() {
  1444  		cli := Client(c, testConfig)
  1445  		cli.vers = clientHello.vers
  1446  		cli.writeRecord(recordTypeHandshake, clientHello.marshal())
  1447  		c.Close()
  1448  	}()
  1449  	conn := Server(s, serverConfig)
  1450  	ctx := context.Background()
  1451  	ch, err := conn.readClientHello(ctx)
  1452  	hs := serverHandshakeState{
  1453  		c:           conn,
  1454  		ctx:         ctx,
  1455  		clientHello: ch,
  1456  	}
  1457  	if err == nil {
  1458  		err = hs.processClientHello()
  1459  	}
  1460  	if err == nil {
  1461  		err = hs.pickCipherSuite()
  1462  	}
  1463  	defer s.Close()
  1464  
  1465  	if err == nil {
  1466  		t.Error("No error reported from server")
  1467  	}
  1468  
  1469  	cs := hs.c.ConnectionState()
  1470  	if cs.HandshakeComplete {
  1471  		t.Error("Handshake registered as complete")
  1472  	}
  1473  
  1474  	if cs.ServerName != expectedServerName {
  1475  		t.Errorf("Expected ServerName of %q, but got %q", expectedServerName, cs.ServerName)
  1476  	}
  1477  }
  1478  
  1479  var getConfigForClientTests = []struct {
  1480  	setup          func(config *Config)
  1481  	callback       func(clientHello *ClientHelloInfo) (*Config, error)
  1482  	errorSubstring string
  1483  	verify         func(config *Config) error
  1484  }{
  1485  	{
  1486  		nil,
  1487  		func(clientHello *ClientHelloInfo) (*Config, error) {
  1488  			return nil, nil
  1489  		},
  1490  		"",
  1491  		nil,
  1492  	},
  1493  	{
  1494  		nil,
  1495  		func(clientHello *ClientHelloInfo) (*Config, error) {
  1496  			return nil, errors.New("should bubble up")
  1497  		},
  1498  		"should bubble up",
  1499  		nil,
  1500  	},
  1501  	{
  1502  		nil,
  1503  		func(clientHello *ClientHelloInfo) (*Config, error) {
  1504  			config := testConfig.Clone()
  1505  			// Setting a maximum version of TLS 1.1 should cause
  1506  			// the handshake to fail, as the client MinVersion is TLS 1.2.
  1507  			config.MaxVersion = VersionTLS11
  1508  			return config, nil
  1509  		},
  1510  		"client offered only unsupported versions",
  1511  		nil,
  1512  	},
  1513  	{
  1514  		func(config *Config) {
  1515  			for i := range config.SessionTicketKey {
  1516  				config.SessionTicketKey[i] = byte(i)
  1517  			}
  1518  			config.sessionTicketKeys = nil
  1519  		},
  1520  		func(clientHello *ClientHelloInfo) (*Config, error) {
  1521  			config := testConfig.Clone()
  1522  			for i := range config.SessionTicketKey {
  1523  				config.SessionTicketKey[i] = 0
  1524  			}
  1525  			config.sessionTicketKeys = nil
  1526  			return config, nil
  1527  		},
  1528  		"",
  1529  		func(config *Config) error {
  1530  			if config.SessionTicketKey == [32]byte{} {
  1531  				return fmt.Errorf("expected SessionTicketKey to be set")
  1532  			}
  1533  			return nil
  1534  		},
  1535  	},
  1536  	{
  1537  		func(config *Config) {
  1538  			var dummyKey [32]byte
  1539  			for i := range dummyKey {
  1540  				dummyKey[i] = byte(i)
  1541  			}
  1542  
  1543  			config.SetSessionTicketKeys([][32]byte{dummyKey})
  1544  		},
  1545  		func(clientHello *ClientHelloInfo) (*Config, error) {
  1546  			config := testConfig.Clone()
  1547  			config.sessionTicketKeys = nil
  1548  			return config, nil
  1549  		},
  1550  		"",
  1551  		func(config *Config) error {
  1552  			if config.SessionTicketKey == [32]byte{} {
  1553  				return fmt.Errorf("expected SessionTicketKey to be set")
  1554  			}
  1555  			return nil
  1556  		},
  1557  	},
  1558  }
  1559  
  1560  func TestGetConfigForClient(t *testing.T) {
  1561  	serverConfig := testConfig.Clone()
  1562  	clientConfig := testConfig.Clone()
  1563  	clientConfig.MinVersion = VersionTLS12
  1564  
  1565  	for i, test := range getConfigForClientTests {
  1566  		if test.setup != nil {
  1567  			test.setup(serverConfig)
  1568  		}
  1569  
  1570  		var configReturned *Config
  1571  		serverConfig.GetConfigForClient = func(clientHello *ClientHelloInfo) (*Config, error) {
  1572  			config, err := test.callback(clientHello)
  1573  			configReturned = config
  1574  			return config, err
  1575  		}
  1576  		c, s := localPipe(t)
  1577  		done := make(chan error)
  1578  
  1579  		go func() {
  1580  			defer s.Close()
  1581  			done <- Server(s, serverConfig).Handshake()
  1582  		}()
  1583  
  1584  		clientErr := Client(c, clientConfig).Handshake()
  1585  		c.Close()
  1586  
  1587  		serverErr := <-done
  1588  
  1589  		if len(test.errorSubstring) == 0 {
  1590  			if serverErr != nil || clientErr != nil {
  1591  				t.Errorf("test[%d]: expected no error but got serverErr: %q, clientErr: %q", i, serverErr, clientErr)
  1592  			}
  1593  			if test.verify != nil {
  1594  				if err := test.verify(configReturned); err != nil {
  1595  					t.Errorf("test[%d]: verify returned error: %v", i, err)
  1596  				}
  1597  			}
  1598  		} else {
  1599  			if serverErr == nil {
  1600  				t.Errorf("test[%d]: expected error containing %q but got no error", i, test.errorSubstring)
  1601  			} else if !strings.Contains(serverErr.Error(), test.errorSubstring) {
  1602  				t.Errorf("test[%d]: expected error to contain %q but it was %q", i, test.errorSubstring, serverErr)
  1603  			}
  1604  		}
  1605  	}
  1606  }
  1607  
  1608  func TestCloseServerConnectionOnIdleClient(t *testing.T) {
  1609  	clientConn, serverConn := localPipe(t)
  1610  	server := Server(serverConn, testConfig.Clone())
  1611  	go func() {
  1612  		clientConn.Write([]byte{'0'})
  1613  		server.Close()
  1614  	}()
  1615  	server.SetReadDeadline(time.Now().Add(time.Minute))
  1616  	err := server.Handshake()
  1617  	if err != nil {
  1618  		if err, ok := err.(net.Error); ok && err.Timeout() {
  1619  			t.Errorf("Expected a closed network connection error but got '%s'", err.Error())
  1620  		}
  1621  	} else {
  1622  		t.Errorf("Error expected, but no error returned")
  1623  	}
  1624  }
  1625  
  1626  func TestCloneHash(t *testing.T) {
  1627  	h1 := crypto.SHA256.New()
  1628  	h1.Write([]byte("test"))
  1629  	s1 := h1.Sum(nil)
  1630  	h2 := cloneHash(h1, crypto.SHA256)
  1631  	s2 := h2.Sum(nil)
  1632  	if !bytes.Equal(s1, s2) {
  1633  		t.Error("cloned hash generated a different sum")
  1634  	}
  1635  }
  1636  
  1637  func expectError(t *testing.T, err error, sub string) {
  1638  	if err == nil {
  1639  		t.Errorf(`expected error %q, got nil`, sub)
  1640  	} else if !strings.Contains(err.Error(), sub) {
  1641  		t.Errorf(`expected error %q, got %q`, sub, err)
  1642  	}
  1643  }
  1644  
  1645  func TestKeyTooSmallForRSAPSS(t *testing.T) {
  1646  	cert, err := X509KeyPair([]byte(`-----BEGIN CERTIFICATE-----
  1647  MIIBcTCCARugAwIBAgIQGjQnkCFlUqaFlt6ixyz/tDANBgkqhkiG9w0BAQsFADAS
  1648  MRAwDgYDVQQKEwdBY21lIENvMB4XDTE5MDExODIzMjMyOFoXDTIwMDExODIzMjMy
  1649  OFowEjEQMA4GA1UEChMHQWNtZSBDbzBcMA0GCSqGSIb3DQEBAQUAA0sAMEgCQQDd
  1650  ez1rFUDwax2HTxbcnFUP9AhcgEGMHVV2nn4VVEWFJB6I8C/Nkx0XyyQlrmFYBzEQ
  1651  nIPhKls4T0hFoLvjJnXpAgMBAAGjTTBLMA4GA1UdDwEB/wQEAwIFoDATBgNVHSUE
  1652  DDAKBggrBgEFBQcDATAMBgNVHRMBAf8EAjAAMBYGA1UdEQQPMA2CC2V4YW1wbGUu
  1653  Y29tMA0GCSqGSIb3DQEBCwUAA0EAxDuUS+BrrS3c+h+k+fQPOmOScy6yTX9mHw0Q
  1654  KbucGamXYEy0URIwOdO0tQ3LHPc1YGvYSPwkDjkjqECs2Vm/AA==
  1655  -----END CERTIFICATE-----`), []byte(testingKey(`-----BEGIN RSA TESTING KEY-----
  1656  MIIBOgIBAAJBAN17PWsVQPBrHYdPFtycVQ/0CFyAQYwdVXaefhVURYUkHojwL82T
  1657  HRfLJCWuYVgHMRCcg+EqWzhPSEWgu+MmdekCAwEAAQJBALjQYNTdXF4CFBbXwUz/
  1658  yt9QFDYT9B5WT/12jeGAe653gtYS6OOi/+eAkGmzg1GlRnw6fOfn+HYNFDORST7z
  1659  4j0CIQDn2xz9hVWQEu9ee3vecNT3f60huDGTNoRhtqgweQGX0wIhAPSLj1VcRZEz
  1660  nKpbtU22+PbIMSJ+e80fmY9LIPx5N4HTAiAthGSimMR9bloz0EY3GyuUEyqoDgMd
  1661  hXxjuno2WesoJQIgemilbcALXpxsLmZLgcQ2KSmaVr7jb5ECx9R+hYKTw1sCIG4s
  1662  T+E0J8wlH24pgwQHzy7Ko2qLwn1b5PW8ecrlvP1g
  1663  -----END RSA TESTING KEY-----`)))
  1664  	if err != nil {
  1665  		t.Fatal(err)
  1666  	}
  1667  
  1668  	clientConn, serverConn := localPipe(t)
  1669  	client := Client(clientConn, testConfig)
  1670  	done := make(chan struct{})
  1671  	go func() {
  1672  		config := testConfig.Clone()
  1673  		config.Certificates = []Certificate{cert}
  1674  		config.MinVersion = VersionTLS13
  1675  		server := Server(serverConn, config)
  1676  		err := server.Handshake()
  1677  		expectError(t, err, "key size too small")
  1678  		close(done)
  1679  	}()
  1680  	err = client.Handshake()
  1681  	expectError(t, err, "handshake failure")
  1682  	<-done
  1683  }
  1684  
  1685  func TestMultipleCertificates(t *testing.T) {
  1686  	clientConfig := testConfig.Clone()
  1687  	clientConfig.CipherSuites = []uint16{TLS_RSA_WITH_AES_128_GCM_SHA256}
  1688  	clientConfig.MaxVersion = VersionTLS12
  1689  
  1690  	serverConfig := testConfig.Clone()
  1691  	serverConfig.Certificates = []Certificate{{
  1692  		Certificate: [][]byte{testECDSACertificate},
  1693  		PrivateKey:  testECDSAPrivateKey,
  1694  	}, {
  1695  		Certificate: [][]byte{testRSACertificate},
  1696  		PrivateKey:  testRSAPrivateKey,
  1697  	}}
  1698  
  1699  	_, clientState, err := testHandshake(t, clientConfig, serverConfig)
  1700  	if err != nil {
  1701  		t.Fatal(err)
  1702  	}
  1703  	if got := clientState.PeerCertificates[0].PublicKeyAlgorithm; got != x509.RSA {
  1704  		t.Errorf("expected RSA certificate, got %v", got)
  1705  	}
  1706  }
  1707  
  1708  func TestAESCipherReordering(t *testing.T) {
  1709  	currentAESSupport := hasAESGCMHardwareSupport
  1710  	defer func() { hasAESGCMHardwareSupport = currentAESSupport }()
  1711  
  1712  	tests := []struct {
  1713  		name            string
  1714  		clientCiphers   []uint16
  1715  		serverHasAESGCM bool
  1716  		serverCiphers   []uint16
  1717  		expectedCipher  uint16
  1718  	}{
  1719  		{
  1720  			name: "server has hardware AES, client doesn't (pick ChaCha)",
  1721  			clientCiphers: []uint16{
  1722  				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1723  				TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1724  				TLS_RSA_WITH_AES_128_CBC_SHA,
  1725  			},
  1726  			serverHasAESGCM: true,
  1727  			expectedCipher:  TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1728  		},
  1729  		{
  1730  			name: "client prefers AES-GCM, server doesn't have hardware AES (pick ChaCha)",
  1731  			clientCiphers: []uint16{
  1732  				TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1733  				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1734  				TLS_RSA_WITH_AES_128_CBC_SHA,
  1735  			},
  1736  			serverHasAESGCM: false,
  1737  			expectedCipher:  TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1738  		},
  1739  		{
  1740  			name: "client prefers AES-GCM, server has hardware AES (pick AES-GCM)",
  1741  			clientCiphers: []uint16{
  1742  				TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1743  				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1744  				TLS_RSA_WITH_AES_128_CBC_SHA,
  1745  			},
  1746  			serverHasAESGCM: true,
  1747  			expectedCipher:  TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1748  		},
  1749  		{
  1750  			name: "client prefers AES-GCM and sends GREASE, server has hardware AES (pick AES-GCM)",
  1751  			clientCiphers: []uint16{
  1752  				0x0A0A, // GREASE value
  1753  				TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1754  				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1755  				TLS_RSA_WITH_AES_128_CBC_SHA,
  1756  			},
  1757  			serverHasAESGCM: true,
  1758  			expectedCipher:  TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1759  		},
  1760  		{
  1761  			name: "client prefers AES-GCM and doesn't support ChaCha, server doesn't have hardware AES (pick AES-GCM)",
  1762  			clientCiphers: []uint16{
  1763  				TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1764  				TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
  1765  				TLS_RSA_WITH_AES_128_CBC_SHA,
  1766  			},
  1767  			serverHasAESGCM: false,
  1768  			expectedCipher:  TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1769  		},
  1770  		{
  1771  			name: "client prefers AES-GCM and AES-CBC over ChaCha, server doesn't have hardware AES (pick ChaCha)",
  1772  			clientCiphers: []uint16{
  1773  				TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1774  				TLS_RSA_WITH_AES_128_CBC_SHA,
  1775  				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1776  			},
  1777  			serverHasAESGCM: false,
  1778  			expectedCipher:  TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1779  		},
  1780  		{
  1781  			name: "client prefers AES-GCM over ChaCha and sends GREASE, server doesn't have hardware AES (pick ChaCha)",
  1782  			clientCiphers: []uint16{
  1783  				0x0A0A, // GREASE value
  1784  				TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1785  				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1786  				TLS_RSA_WITH_AES_128_CBC_SHA,
  1787  			},
  1788  			serverHasAESGCM: false,
  1789  			expectedCipher:  TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1790  		},
  1791  		{
  1792  			name: "client supports multiple AES-GCM, server doesn't have hardware AES and doesn't support ChaCha (AES-GCM)",
  1793  			clientCiphers: []uint16{
  1794  				TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
  1795  				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1796  				TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1797  			},
  1798  			serverHasAESGCM: false,
  1799  			serverCiphers: []uint16{
  1800  				TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
  1801  				TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1802  			},
  1803  			expectedCipher: TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1804  		},
  1805  		{
  1806  			name: "client prefers AES-GCM, server has hardware but doesn't support AES (pick ChaCha)",
  1807  			clientCiphers: []uint16{
  1808  				TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
  1809  				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1810  				TLS_RSA_WITH_AES_128_CBC_SHA,
  1811  			},
  1812  			serverHasAESGCM: true,
  1813  			serverCiphers: []uint16{
  1814  				TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1815  			},
  1816  			expectedCipher: TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305,
  1817  		},
  1818  	}
  1819  
  1820  	for _, tc := range tests {
  1821  		t.Run(tc.name, func(t *testing.T) {
  1822  			hasAESGCMHardwareSupport = tc.serverHasAESGCM
  1823  			hs := &serverHandshakeState{
  1824  				c: &Conn{
  1825  					config: &Config{
  1826  						CipherSuites: tc.serverCiphers,
  1827  					},
  1828  					vers: VersionTLS12,
  1829  				},
  1830  				clientHello: &clientHelloMsg{
  1831  					cipherSuites: tc.clientCiphers,
  1832  					vers:         VersionTLS12,
  1833  				},
  1834  				ecdheOk:      true,
  1835  				rsaSignOk:    true,
  1836  				rsaDecryptOk: true,
  1837  			}
  1838  
  1839  			err := hs.pickCipherSuite()
  1840  			if err != nil {
  1841  				t.Errorf("pickCipherSuite failed: %s", err)
  1842  			}
  1843  
  1844  			if tc.expectedCipher != hs.suite.id {
  1845  				t.Errorf("unexpected cipher chosen: want %d, got %d", tc.expectedCipher, hs.suite.id)
  1846  			}
  1847  		})
  1848  	}
  1849  }
  1850  
  1851  func TestAESCipherReorderingTLS13(t *testing.T) {
  1852  	currentAESSupport := hasAESGCMHardwareSupport
  1853  	defer func() { hasAESGCMHardwareSupport = currentAESSupport }()
  1854  
  1855  	tests := []struct {
  1856  		name            string
  1857  		clientCiphers   []uint16
  1858  		serverHasAESGCM bool
  1859  		expectedCipher  uint16
  1860  	}{
  1861  		{
  1862  			name: "server has hardware AES, client doesn't (pick ChaCha)",
  1863  			clientCiphers: []uint16{
  1864  				TLS_CHACHA20_POLY1305_SHA256,
  1865  				TLS_AES_128_GCM_SHA256,
  1866  			},
  1867  			serverHasAESGCM: true,
  1868  			expectedCipher:  TLS_CHACHA20_POLY1305_SHA256,
  1869  		},
  1870  		{
  1871  			name: "neither server nor client have hardware AES (pick ChaCha)",
  1872  			clientCiphers: []uint16{
  1873  				TLS_CHACHA20_POLY1305_SHA256,
  1874  				TLS_AES_128_GCM_SHA256,
  1875  			},
  1876  			serverHasAESGCM: false,
  1877  			expectedCipher:  TLS_CHACHA20_POLY1305_SHA256,
  1878  		},
  1879  		{
  1880  			name: "client prefers AES, server doesn't have hardware (pick ChaCha)",
  1881  			clientCiphers: []uint16{
  1882  				TLS_AES_128_GCM_SHA256,
  1883  				TLS_CHACHA20_POLY1305_SHA256,
  1884  			},
  1885  			serverHasAESGCM: false,
  1886  			expectedCipher:  TLS_CHACHA20_POLY1305_SHA256,
  1887  		},
  1888  		{
  1889  			name: "client prefers AES and sends GREASE, server doesn't have hardware (pick ChaCha)",
  1890  			clientCiphers: []uint16{
  1891  				0x0A0A, // GREASE value
  1892  				TLS_AES_128_GCM_SHA256,
  1893  				TLS_CHACHA20_POLY1305_SHA256,
  1894  			},
  1895  			serverHasAESGCM: false,
  1896  			expectedCipher:  TLS_CHACHA20_POLY1305_SHA256,
  1897  		},
  1898  		{
  1899  			name: "client prefers AES, server has hardware AES (pick AES)",
  1900  			clientCiphers: []uint16{
  1901  				TLS_AES_128_GCM_SHA256,
  1902  				TLS_CHACHA20_POLY1305_SHA256,
  1903  			},
  1904  			serverHasAESGCM: true,
  1905  			expectedCipher:  TLS_AES_128_GCM_SHA256,
  1906  		},
  1907  		{
  1908  			name: "client prefers AES and sends GREASE, server has hardware AES (pick AES)",
  1909  			clientCiphers: []uint16{
  1910  				0x0A0A, // GREASE value
  1911  				TLS_AES_128_GCM_SHA256,
  1912  				TLS_CHACHA20_POLY1305_SHA256,
  1913  			},
  1914  			serverHasAESGCM: true,
  1915  			expectedCipher:  TLS_AES_128_GCM_SHA256,
  1916  		},
  1917  	}
  1918  
  1919  	for _, tc := range tests {
  1920  		t.Run(tc.name, func(t *testing.T) {
  1921  			hasAESGCMHardwareSupport = tc.serverHasAESGCM
  1922  			hs := &serverHandshakeStateTLS13{
  1923  				c: &Conn{
  1924  					config: &Config{},
  1925  					vers:   VersionTLS13,
  1926  				},
  1927  				clientHello: &clientHelloMsg{
  1928  					cipherSuites:       tc.clientCiphers,
  1929  					supportedVersions:  []uint16{VersionTLS13},
  1930  					compressionMethods: []uint8{compressionNone},
  1931  					keyShares:          []keyShare{{group: X25519, data: curve25519.Basepoint}},
  1932  				},
  1933  			}
  1934  
  1935  			err := hs.processClientHello()
  1936  			if err != nil {
  1937  				t.Errorf("pickCipherSuite failed: %s", err)
  1938  			}
  1939  
  1940  			if tc.expectedCipher != hs.suite.id {
  1941  				t.Errorf("unexpected cipher chosen: want %d, got %d", tc.expectedCipher, hs.suite.id)
  1942  			}
  1943  		})
  1944  	}
  1945  }
  1946  
  1947  // TestServerHandshakeContextCancellation tests that cancelling
  1948  // the context given to the server side conn.HandshakeContext
  1949  // interrupts the in-progress handshake.
  1950  func TestServerHandshakeContextCancellation(t *testing.T) {
  1951  	c, s := localPipe(t)
  1952  	ctx, cancel := context.WithCancel(context.Background())
  1953  	unblockClient := make(chan struct{})
  1954  	defer close(unblockClient)
  1955  	go func() {
  1956  		cancel()
  1957  		<-unblockClient
  1958  		_ = c.Close()
  1959  	}()
  1960  	conn := Server(s, testConfig)
  1961  	// Initiates server side handshake, which will block until a client hello is read
  1962  	// unless the cancellation works.
  1963  	err := conn.HandshakeContext(ctx)
  1964  	if err == nil {
  1965  		t.Fatal("Server handshake did not error when the context was canceled")
  1966  	}
  1967  	if err != context.Canceled {
  1968  		t.Errorf("Unexpected server handshake error: %v", err)
  1969  	}
  1970  	if runtime.GOARCH == "wasm" {
  1971  		t.Skip("conn.Close does not error as expected when called multiple times on WASM")
  1972  	}
  1973  	err = conn.Close()
  1974  	if err == nil {
  1975  		t.Error("Server connection was not closed when the context was canceled")
  1976  	}
  1977  }
  1978  
  1979  // TestHandshakeContextHierarchy tests whether the contexts
  1980  // available to GetClientCertificate and GetCertificate are
  1981  // derived from the context provided to HandshakeContext, and
  1982  // that those contexts are canceled after HandshakeContext has
  1983  // returned.
  1984  func TestHandshakeContextHierarchy(t *testing.T) {
  1985  	c, s := localPipe(t)
  1986  	clientErr := make(chan error, 1)
  1987  	clientConfig := testConfig.Clone()
  1988  	serverConfig := testConfig.Clone()
  1989  	ctx, cancel := context.WithCancel(context.Background())
  1990  	defer cancel()
  1991  	key := struct{}{}
  1992  	ctx = context.WithValue(ctx, key, true)
  1993  	go func() {
  1994  		defer close(clientErr)
  1995  		defer c.Close()
  1996  		var innerCtx context.Context
  1997  		clientConfig.Certificates = nil
  1998  		clientConfig.GetClientCertificate = func(certificateRequest *CertificateRequestInfo) (*Certificate, error) {
  1999  			if val, ok := certificateRequest.Context().Value(key).(bool); !ok || !val {
  2000  				t.Errorf("GetClientCertificate context was not child of HandshakeContext")
  2001  			}
  2002  			innerCtx = certificateRequest.Context()
  2003  			return &Certificate{
  2004  				Certificate: [][]byte{testRSACertificate},
  2005  				PrivateKey:  testRSAPrivateKey,
  2006  			}, nil
  2007  		}
  2008  		cli := Client(c, clientConfig)
  2009  		err := cli.HandshakeContext(ctx)
  2010  		if err != nil {
  2011  			clientErr <- err
  2012  			return
  2013  		}
  2014  		select {
  2015  		case <-innerCtx.Done():
  2016  		default:
  2017  			t.Errorf("GetClientCertificate context was not canceled after HandshakeContext returned.")
  2018  		}
  2019  	}()
  2020  	var innerCtx context.Context
  2021  	serverConfig.Certificates = nil
  2022  	serverConfig.ClientAuth = RequestClientCert
  2023  	serverConfig.GetCertificate = func(clientHello *ClientHelloInfo) (*Certificate, error) {
  2024  		if val, ok := clientHello.Context().Value(key).(bool); !ok || !val {
  2025  			t.Errorf("GetClientCertificate context was not child of HandshakeContext")
  2026  		}
  2027  		innerCtx = clientHello.Context()
  2028  		return &Certificate{
  2029  			Certificate: [][]byte{testRSACertificate},
  2030  			PrivateKey:  testRSAPrivateKey,
  2031  		}, nil
  2032  	}
  2033  	conn := Server(s, serverConfig)
  2034  	err := conn.HandshakeContext(ctx)
  2035  	if err != nil {
  2036  		t.Errorf("Unexpected server handshake error: %v", err)
  2037  	}
  2038  	select {
  2039  	case <-innerCtx.Done():
  2040  	default:
  2041  		t.Errorf("GetCertificate context was not canceled after HandshakeContext returned.")
  2042  	}
  2043  	if err := <-clientErr; err != nil {
  2044  		t.Errorf("Unexpected client error: %v", err)
  2045  	}
  2046  }
  2047  

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