tls: Per-site TLS configs using GetClientConfig, including http2 switch (#1389)

* Remove manual TLS clone method

* WiP tls

* Use GetClientConfig for tls.Config

* gofmt -s -w

* GetConfig

* Handshake

* Removed comment

* Disable HTTP2 on demand

* Remove junk

* Remove http2 enable (no-op)

caddyhttp/httpserver/server.go

@@ -31,6 +31,7 @@ type Server struct {
 	connTimeout time.Duration // max time to wait for a connection before force stop
 	tlsGovChan  chan struct{} // close to stop the TLS maintenance goroutine
 	vhosts      *vhostTrie
+	tlsConfig   caddytls.ConfigGroup
 }
 
 // ensure it satisfies the interface
@@ -72,16 +73,31 @@ func NewServer(addr string, group []*SiteConfig) (*Server, error) {
 	}
 
 	// Set up TLS configuration
-	var tlsConfigs []*caddytls.Config
+	tlsConfigs := make(caddytls.ConfigGroup)
+	var allConfigs []*caddytls.Config
+
 	for _, site := range group {
-		tlsConfigs = append(tlsConfigs, site.TLS)
+
+		if err := site.TLS.Build(tlsConfigs); err != nil {
+			return nil, err
+		}
+
+		tlsConfigs[site.TLS.Hostname] = site.TLS
+		allConfigs = append(allConfigs, site.TLS)
 	}
-	var err error
-	s.Server.TLSConfig, err = caddytls.MakeTLSConfig(tlsConfigs)
-	if err != nil {
+
+	// Check if configs are valid
+	if err := caddytls.CheckConfigs(allConfigs); err != nil {
 		return nil, err
 	}
 
+	s.tlsConfig = tlsConfigs
+
+	s.Server.TLSConfig = &tls.Config{
+		GetConfigForClient: s.tlsConfig.GetConfigForClient,
+		GetCertificate:     s.tlsConfig.GetCertificate,
+	}
+
 	// As of Go 1.7, HTTP/2 is enabled only if NextProtos includes the string "h2"
 	if HTTP2 && s.Server.TLSConfig != nil && len(s.Server.TLSConfig.NextProtos) == 0 {
 		s.Server.TLSConfig.NextProtos = []string{"h2"}

caddyhttp/proxy/reverseproxy.go

@@ -442,7 +442,7 @@ func newConnHijackerTransport(base http.RoundTripper) *connHijackerTransport {
 	if b, _ := base.(*http.Transport); b != nil {
 		tlsClientConfig := b.TLSClientConfig
 		if tlsClientConfig.NextProtos != nil {
-			tlsClientConfig = cloneTLSClientConfig(tlsClientConfig)
+			tlsClientConfig = tlsClientConfig.Clone()
 			tlsClientConfig.NextProtos = nil
 		}
 
@@ -566,37 +566,6 @@ func (tlsHandshakeTimeoutError) Timeout() bool   { return true }
 func (tlsHandshakeTimeoutError) Temporary() bool { return true }
 func (tlsHandshakeTimeoutError) Error() string   { return "net/http: TLS handshake timeout" }
 
-// cloneTLSClientConfig is like cloneTLSConfig but omits
-// the fields SessionTicketsDisabled and SessionTicketKey.
-// This makes it safe to call cloneTLSClientConfig on a config
-// in active use by a server.
-func cloneTLSClientConfig(cfg *tls.Config) *tls.Config {
-	if cfg == nil {
-		return &tls.Config{}
-	}
-	return &tls.Config{
-		Rand:                        cfg.Rand,
-		Time:                        cfg.Time,
-		Certificates:                cfg.Certificates,
-		NameToCertificate:           cfg.NameToCertificate,
-		GetCertificate:              cfg.GetCertificate,
-		RootCAs:                     cfg.RootCAs,
-		NextProtos:                  cfg.NextProtos,
-		ServerName:                  cfg.ServerName,
-		ClientAuth:                  cfg.ClientAuth,
-		ClientCAs:                   cfg.ClientCAs,
-		InsecureSkipVerify:          cfg.InsecureSkipVerify,
-		CipherSuites:                cfg.CipherSuites,
-		PreferServerCipherSuites:    cfg.PreferServerCipherSuites,
-		ClientSessionCache:          cfg.ClientSessionCache,
-		MinVersion:                  cfg.MinVersion,
-		MaxVersion:                  cfg.MaxVersion,
-		CurvePreferences:            cfg.CurvePreferences,
-		DynamicRecordSizingDisabled: cfg.DynamicRecordSizingDisabled,
-		Renegotiation:               cfg.Renegotiation,
-	}
-}
-
 func requestIsWebsocket(req *http.Request) bool {
 	return strings.ToLower(req.Header.Get("Upgrade")) == "websocket" && strings.Contains(strings.ToLower(req.Header.Get("Connection")), "upgrade")
 }

caddytls/config.go

@@ -108,6 +108,12 @@ type Config struct {
 
 	// Add the must staple TLS extension to the CSR generated by lego/acme
 	MustStaple bool
+
+	// Disables HTTP2 completely
+	DisableHTTP2 bool
+
+	// Holds final tls.Config
+	tlsConfig *tls.Config
 }
 
 // OnDemandState contains some state relevant for providing
@@ -217,88 +223,70 @@ func (c *Config) StorageFor(caURL string) (Storage, error) {
 	return s, nil
 }
 
-// MakeTLSConfig reduces configs into a single tls.Config.
-// If TLS is to be disabled, a nil tls.Config will be returned.
-func MakeTLSConfig(configs []*Config) (*tls.Config, error) {
-	if len(configs) == 0 {
-		return nil, nil
+func (cfg *Config) Build(group ConfigGroup) error {
+	config, err := cfg.build()
+
+	if err != nil {
+		return err
 	}
 
+	cfg.tlsConfig = config
+	cfg.tlsConfig.GetCertificate = group.GetCertificate
+	return nil
+}
+
+func (cfg *Config) build() (*tls.Config, error) {
 	config := new(tls.Config)
+
 	ciphersAdded := make(map[uint16]struct{})
 	curvesAdded := make(map[tls.CurveID]struct{})
-	configMap := make(configGroup)
 
-	for i, cfg := range configs {
-		if cfg == nil {
-			// avoid nil pointer dereference below
-			configs[i] = new(Config)
-			continue
-		}
-
-		// Key this config by its hostname; this
-		// overwrites configs with the same hostname
-		configMap[cfg.Hostname] = cfg
-
-		// Can't serve TLS and not-TLS on same port
-		if i > 0 && cfg.Enabled != configs[i-1].Enabled {
-			thisConfProto, lastConfProto := "not TLS", "not TLS"
-			if cfg.Enabled {
-				thisConfProto = "TLS"
-			}
-			if configs[i-1].Enabled {
-				lastConfProto = "TLS"
-			}
-			return nil, fmt.Errorf("cannot multiplex %s (%s) and %s (%s) on same listener",
-				configs[i-1].Hostname, lastConfProto, cfg.Hostname, thisConfProto)
-		}
-
-		if !cfg.Enabled {
-			continue
-		}
-
-		// Union cipher suites
-		for _, ciph := range cfg.Ciphers {
-			if _, ok := ciphersAdded[ciph]; !ok {
-				ciphersAdded[ciph] = struct{}{}
-				config.CipherSuites = append(config.CipherSuites, ciph)
-			}
-		}
-
-		// Can't resolve conflicting PreferServerCipherSuites settings
-		if i > 0 && cfg.PreferServerCipherSuites != configs[i-1].PreferServerCipherSuites {
-			return nil, fmt.Errorf("cannot both PreferServerCipherSuites and not prefer them")
-		}
-		config.PreferServerCipherSuites = cfg.PreferServerCipherSuites
-
-		// Union curves
-		for _, curv := range cfg.CurvePreferences {
-			if _, ok := curvesAdded[curv]; !ok {
-				curvesAdded[curv] = struct{}{}
-				config.CurvePreferences = append(config.CurvePreferences, curv)
-			}
-		}
-
-		// Go with the widest range of protocol versions
-		if config.MinVersion == 0 || cfg.ProtocolMinVersion < config.MinVersion {
-			config.MinVersion = cfg.ProtocolMinVersion
-		}
-		if cfg.ProtocolMaxVersion > config.MaxVersion {
-			config.MaxVersion = cfg.ProtocolMaxVersion
-		}
-
-		// Go with the strictest ClientAuth type
-		if cfg.ClientAuth > config.ClientAuth {
-			config.ClientAuth = cfg.ClientAuth
+	// Add cipher suites
+	for _, ciph := range cfg.Ciphers {
+		if _, ok := ciphersAdded[ciph]; !ok {
+			ciphersAdded[ciph] = struct{}{}
+			config.CipherSuites = append(config.CipherSuites, ciph)
 		}
 	}
 
-	// Is TLS disabled? If so, we're done here.
-	// By now, we know that all configs agree
-	// whether it is or not, so we can just look
-	// at the first one.
-	if len(configs) == 0 || !configs[0].Enabled {
-		return nil, nil
+	config.PreferServerCipherSuites = cfg.PreferServerCipherSuites
+
+	// Union curves
+	for _, curv := range cfg.CurvePreferences {
+		if _, ok := curvesAdded[curv]; !ok {
+			curvesAdded[curv] = struct{}{}
+			config.CurvePreferences = append(config.CurvePreferences, curv)
+		}
+	}
+
+	config.MinVersion = cfg.ProtocolMinVersion
+	config.MaxVersion = cfg.ProtocolMaxVersion
+	config.ClientAuth = cfg.ClientAuth
+
+	// Set up client authentication if enabled
+	if config.ClientAuth != tls.NoClientCert {
+		pool := x509.NewCertPool()
+		clientCertsAdded := make(map[string]struct{})
+
+		for _, caFile := range cfg.ClientCerts {
+			// don't add cert to pool more than once
+			if _, ok := clientCertsAdded[caFile]; ok {
+				continue
+			}
+			clientCertsAdded[caFile] = struct{}{}
+
+			// Any client with a certificate from this CA will be allowed to connect
+			caCrt, err := ioutil.ReadFile(caFile)
+			if err != nil {
+				return nil, err
+			}
+
+			if !pool.AppendCertsFromPEM(caCrt) {
+				return nil, fmt.Errorf("error loading client certificate '%s': no certificates were successfully parsed", caFile)
+			}
+		}
+
+		config.ClientCAs = pool
 	}
 
 	// Default cipher suites
@@ -311,43 +299,44 @@ func MakeTLSConfig(configs []*Config) (*tls.Config, error) {
 		config.CipherSuites = append([]uint16{tls.TLS_FALLBACK_SCSV}, config.CipherSuites...)
 	}
 
-	// Default curves
-	if len(config.CurvePreferences) == 0 {
-		config.CurvePreferences = defaultCurves
+	if cfg.DisableHTTP2 {
+		config.NextProtos = []string{}
+	} else {
+		config.NextProtos = []string{"h2"}
 	}
 
-	// Set up client authentication if enabled
-	if config.ClientAuth != tls.NoClientCert {
-		pool := x509.NewCertPool()
-		clientCertsAdded := make(map[string]struct{})
-		for _, cfg := range configs {
-			for _, caFile := range cfg.ClientCerts {
-				// don't add cert to pool more than once
-				if _, ok := clientCertsAdded[caFile]; ok {
-					continue
-				}
-				clientCertsAdded[caFile] = struct{}{}
-
-				// Any client with a certificate from this CA will be allowed to connect
-				caCrt, err := ioutil.ReadFile(caFile)
-				if err != nil {
-					return nil, err
-				}
-
-				if !pool.AppendCertsFromPEM(caCrt) {
-					return nil, fmt.Errorf("error loading client certificate '%s': no certificates were successfully parsed", caFile)
-				}
-			}
-		}
-		config.ClientCAs = pool
-	}
-
-	// Associate the GetCertificate callback, or almost nothing we just did will work
-	config.GetCertificate = configMap.GetCertificate
-
 	return config, nil
 }
 
+// CheckConfigs checks if multiple TLS configs does not collide with each other
+func CheckConfigs(configs []*Config) error {
+	if len(configs) == 0 {
+		return nil
+	}
+
+	for i, cfg := range configs {
+
+		// Can't serve TLS and not-TLS on same port
+		if i > 0 && cfg.Enabled != configs[i-1].Enabled {
+			thisConfProto, lastConfProto := "not TLS", "not TLS"
+			if cfg.Enabled {
+				thisConfProto = "TLS"
+			}
+			if configs[i-1].Enabled {
+				lastConfProto = "TLS"
+			}
+			return fmt.Errorf("cannot multiplex %s (%s) and %s (%s) on same listener",
+				configs[i-1].Hostname, lastConfProto, cfg.Hostname, thisConfProto)
+		}
+
+		if !cfg.Enabled {
+			continue
+		}
+	}
+
+	return nil
+}
+
 // ConfigGetter gets a Config keyed by key.
 type ConfigGetter func(c *caddy.Controller) *Config
 

caddytls/config_test.go

@@ -10,14 +10,12 @@ import (
 
 func TestMakeTLSConfigProtocolVersions(t *testing.T) {
 	// same min and max protocol versions
-	configs := []*Config{
-		{
-			Enabled:            true,
-			ProtocolMinVersion: tls.VersionTLS12,
-			ProtocolMaxVersion: tls.VersionTLS12,
-		},
+	config := Config{
+		Enabled:            true,
+		ProtocolMinVersion: tls.VersionTLS12,
+		ProtocolMaxVersion: tls.VersionTLS12,
 	}
-	result, err := MakeTLSConfig(configs)
+	result, err := config.build()
 	if err != nil {
 		t.Fatalf("Did not expect an error, but got %v", err)
 	}
@@ -31,28 +29,14 @@ func TestMakeTLSConfigProtocolVersions(t *testing.T) {
 
 func TestMakeTLSConfigPreferServerCipherSuites(t *testing.T) {
 	// prefer server cipher suites
-	configs := []*Config{{Enabled: true, PreferServerCipherSuites: true}}
-	result, err := MakeTLSConfig(configs)
+	config := Config{Enabled: true, PreferServerCipherSuites: true}
+	result, err := config.build()
 	if err != nil {
 		t.Fatalf("Did not expect an error, but got %v", err)
 	}
 	if got, want := result.PreferServerCipherSuites, true; got != want {
 		t.Errorf("Expected PreferServerCipherSuites==%v but got %v", want, got)
 	}
-
-	// make sure we don't get an error if there's a conflict
-	// when both of the configs have TLS disabled
-	configs = []*Config{
-		{Enabled: false, PreferServerCipherSuites: false},
-		{Enabled: false, PreferServerCipherSuites: true},
-	}
-	result, err = MakeTLSConfig(configs)
-	if err != nil {
-		t.Fatalf("Did not expect an error when TLS is disabled, but got '%v'", err)
-	}
-	if result != nil {
-		t.Errorf("Expected nil result because TLS disabled, got: %+v", err)
-	}
 }
 
 func TestMakeTLSConfigTLSEnabledDisabled(t *testing.T) {
@@ -61,20 +45,10 @@ func TestMakeTLSConfigTLSEnabledDisabled(t *testing.T) {
 		{Enabled: true},
 		{Enabled: false},
 	}
-	_, err := MakeTLSConfig(configs)
+	err := CheckConfigs(configs)
 	if err == nil {
 		t.Fatalf("Expected an error, but got %v", err)
 	}
-
-	// verify that when disabled, a nil pair is returned
-	configs = []*Config{{}, {}}
-	result, err := MakeTLSConfig(configs)
-	if err != nil {
-		t.Errorf("Did not expect an error, but got %v", err)
-	}
-	if result != nil {
-		t.Errorf("Expected a nil *tls.Config result, got %+v", result)
-	}
 }
 
 func TestMakeTLSConfigCipherSuites(t *testing.T) {
@@ -83,25 +57,22 @@ func TestMakeTLSConfigCipherSuites(t *testing.T) {
 	configs := []*Config{
 		{Enabled: true, Ciphers: []uint16{0xc02c, 0xc030}},
 		{Enabled: true, Ciphers: []uint16{0xc012, 0xc030, 0xc00a}},
-	}
-	result, err := MakeTLSConfig(configs)
-	if err != nil {
-		t.Fatalf("Did not expect an error, but got %v", err)
-	}
-	expected := []uint16{tls.TLS_FALLBACK_SCSV, 0xc02c, 0xc030, 0xc012, 0xc00a}
-	if !reflect.DeepEqual(result.CipherSuites, expected) {
-		t.Errorf("Expected ciphers %v but got %v", expected, result.CipherSuites)
+		{Enabled: true, Ciphers: nil},
 	}
 
-	// use default suites if none specified
-	configs = []*Config{{Enabled: true}}
-	result, err = MakeTLSConfig(configs)
-	if err != nil {
-		t.Fatalf("Did not expect an error, but got %v", err)
+	expectedCiphers := [][]uint16{
+		{tls.TLS_FALLBACK_SCSV, 0xc02c, 0xc030},
+		{tls.TLS_FALLBACK_SCSV, 0xc012, 0xc030, 0xc00a},
+		append([]uint16{tls.TLS_FALLBACK_SCSV}, defaultCiphers...),
 	}
-	expected = append([]uint16{tls.TLS_FALLBACK_SCSV}, defaultCiphers...)
-	if !reflect.DeepEqual(result.CipherSuites, expected) {
-		t.Errorf("Expected default ciphers %v but got %v", expected, result.CipherSuites)
+
+	for i, config := range configs {
+		cfg, _ := config.build()
+
+		if !reflect.DeepEqual(cfg.CipherSuites, expectedCiphers[i]) {
+			t.Errorf("Expected ciphers %v but got %v", expectedCiphers[i], cfg.CipherSuites)
+		}
+
 	}
 }
 

caddytls/handshake.go

@@ -15,7 +15,7 @@ import (
 // (hostnames can have wildcard characters; use the getConfig
 // method to get a config by matching its hostname). Its
 // GetCertificate function can be used with tls.Config.
-type configGroup map[string]*Config
+type ConfigGroup map[string]*Config
 
 // getConfig gets the config by the first key match for name.
 // In other words, "sub.foo.bar" will get the config for "*.foo.bar"
@@ -24,7 +24,7 @@ type configGroup map[string]*Config
 //
 // This function follows nearly the same logic to lookup
 // a hostname as the getCertificate function uses.
-func (cg configGroup) getConfig(name string) *Config {
+func (cg ConfigGroup) getConfig(name string) *Config {
 	name = strings.ToLower(name)
 
 	// exact match? great, let's use it
@@ -58,11 +58,27 @@ func (cg configGroup) getConfig(name string) *Config {
 // via ACME.
 //
 // This method is safe for use as a tls.Config.GetCertificate callback.
-func (cg configGroup) GetCertificate(clientHello *tls.ClientHelloInfo) (*tls.Certificate, error) {
+func (cg ConfigGroup) GetCertificate(clientHello *tls.ClientHelloInfo) (*tls.Certificate, error) {
 	cert, err := cg.getCertDuringHandshake(strings.ToLower(clientHello.ServerName), true, true)
 	return &cert.Certificate, err
 }
 
+// GetConfigForClient gets a TLS configuration satisfying clientHello. In getting
+// the configuration, it abides the rules and settings defined in the
+// Config that matches clientHello.ServerName.
+//
+// This method is safe for use as a tls.Config.GetConfigForClient callback.
+func (cg ConfigGroup) GetConfigForClient(clientHello *tls.ClientHelloInfo) (*tls.Config, error) {
+
+	config := cg.getConfig(clientHello.ServerName)
+
+	if config != nil {
+		return config.tlsConfig, nil
+	}
+
+	return nil, nil
+}
+
 // getCertDuringHandshake will get a certificate for name. It first tries
 // the in-memory cache. If no certificate for name is in the cache, the
 // config most closely corresponding to name will be loaded. If that config
@@ -74,7 +90,7 @@ func (cg configGroup) GetCertificate(clientHello *tls.ClientHelloInfo) (*tls.Cer
 // certificate is available.
 //
 // This function is safe for concurrent use.
-func (cg configGroup) getCertDuringHandshake(name string, loadIfNecessary, obtainIfNecessary bool) (Certificate, error) {
+func (cg ConfigGroup) getCertDuringHandshake(name string, loadIfNecessary, obtainIfNecessary bool) (Certificate, error) {
 	// First check our in-memory cache to see if we've already loaded it
 	cert, matched, defaulted := getCertificate(name)
 	if matched {
@@ -127,7 +143,7 @@ func (cg configGroup) getCertDuringHandshake(name string, loadIfNecessary, obtai
 // now according to mitigating factors we keep track of and preferences the
 // user has set. If a non-nil error is returned, do not issue a new certificate
 // for name.
-func (cg configGroup) checkLimitsForObtainingNewCerts(name string, cfg *Config) error {
+func (cg ConfigGroup) checkLimitsForObtainingNewCerts(name string, cfg *Config) error {
 	// User can set hard limit for number of certs for the process to issue
 	if cfg.OnDemandState.MaxObtain > 0 &&
 		atomic.LoadInt32(&cfg.OnDemandState.ObtainedCount) >= cfg.OnDemandState.MaxObtain {
@@ -160,7 +176,7 @@ func (cg configGroup) checkLimitsForObtainingNewCerts(name string, cfg *Config)
 // name, it will wait and use what the other goroutine obtained.
 //
 // This function is safe for use by multiple concurrent goroutines.
-func (cg configGroup) obtainOnDemandCertificate(name string, cfg *Config) (Certificate, error) {
+func (cg ConfigGroup) obtainOnDemandCertificate(name string, cfg *Config) (Certificate, error) {
 	// We must protect this process from happening concurrently, so synchronize.
 	obtainCertWaitChansMu.Lock()
 	wait, ok := obtainCertWaitChans[name]
@@ -219,7 +235,7 @@ func (cg configGroup) obtainOnDemandCertificate(name string, cfg *Config) (Certi
 // validity.
 //
 // This function is safe for use by multiple concurrent goroutines.
-func (cg configGroup) handshakeMaintenance(name string, cert Certificate) (Certificate, error) {
+func (cg ConfigGroup) handshakeMaintenance(name string, cert Certificate) (Certificate, error) {
 	// Check cert expiration
 	timeLeft := cert.NotAfter.Sub(time.Now().UTC())
 	if timeLeft < RenewDurationBefore {
@@ -252,7 +268,7 @@ func (cg configGroup) handshakeMaintenance(name string, cert Certificate) (Certi
 // usable. name should already be lower-cased before calling this function.
 //
 // This function is safe for use by multiple concurrent goroutines.
-func (cg configGroup) renewDynamicCertificate(name string, cfg *Config) (Certificate, error) {
+func (cg ConfigGroup) renewDynamicCertificate(name string, cfg *Config) (Certificate, error) {
 	obtainCertWaitChansMu.Lock()
 	wait, ok := obtainCertWaitChans[name]
 	if ok {

caddytls/handshake_test.go

@@ -9,7 +9,7 @@ import (
 func TestGetCertificate(t *testing.T) {
 	defer func() { certCache = make(map[string]Certificate) }()
 
-	cg := make(configGroup)
+	cg := make(ConfigGroup)
 
 	hello := &tls.ClientHelloInfo{ServerName: "example.com"}
 	helloSub := &tls.ClientHelloInfo{ServerName: "sub.example.com"}

caddytls/setup.go

@@ -164,6 +164,20 @@ func setupTLS(c *caddy.Controller) error {
 					return c.Errf("Unsupported Storage provider '%s'", args[0])
 				}
 				config.StorageProvider = args[0]
+
+			case "http2":
+				args := c.RemainingArgs()
+				if len(args) != 1 {
+					return c.ArgErr()
+				}
+
+				switch args[0] {
+				case "off":
+					config.DisableHTTP2 = true
+				default:
+					c.ArgErr()
+				}
+
 			case "muststaple":
 				config.MustStaple = true
 			default:

caddytls/setup_test.go

@@ -91,6 +91,10 @@ func TestSetupParseBasic(t *testing.T) {
 		t.Error("Expected PreferServerCipherSuites = true, but was false")
 	}
 
+	if cfg.DisableHTTP2 {
+		t.Error("Expected HTTP2 to be enabled by default")
+	}
+
 	// Ensure curve count is correct
 	if len(cfg.CurvePreferences) != len(defaultCurves) {
 		t.Errorf("Expected %v Curves, got %v", len(defaultCurves), len(cfg.CurvePreferences))
@@ -118,6 +122,7 @@ func TestSetupParseWithOptionalParams(t *testing.T) {
             protocols tls1.0 tls1.2
             ciphers RSA-AES256-CBC-SHA ECDHE-RSA-AES128-GCM-SHA256 ECDHE-ECDSA-AES256-GCM-SHA384
             muststaple
+            http2 off
         }`
 	cfg := new(Config)
 	RegisterConfigGetter("", func(c *caddy.Controller) *Config { return cfg })
@@ -141,7 +146,11 @@ func TestSetupParseWithOptionalParams(t *testing.T) {
 	}
 
 	if !cfg.MustStaple {
-		t.Errorf("Expected must staple to be true")
+		t.Error("Expected must staple to be true")
+	}
+
+	if !cfg.DisableHTTP2 {
+		t.Error("Expected HTTP2 to be disabled")
 	}
 }
 
@@ -184,7 +193,7 @@ func TestSetupParseWithWrongOptionalParams(t *testing.T) {
 	c = caddy.NewTestController("", params)
 	err = setupTLS(c)
 	if err == nil {
-		t.Errorf("Expected errors, but no error returned")
+		t.Error("Expected errors, but no error returned")
 	}
 
 	// Test key_type wrong params
@@ -196,7 +205,7 @@ func TestSetupParseWithWrongOptionalParams(t *testing.T) {
 	c = caddy.NewTestController("", params)
 	err = setupTLS(c)
 	if err == nil {
-		t.Errorf("Expected errors, but no error returned")
+		t.Error("Expected errors, but no error returned")
 	}
 
 	// Test curves wrong params
@@ -208,7 +217,7 @@ func TestSetupParseWithWrongOptionalParams(t *testing.T) {
 	c = caddy.NewTestController("", params)
 	err = setupTLS(c)
 	if err == nil {
-		t.Errorf("Expected errors, but no error returned")
+		t.Error("Expected errors, but no error returned")
 	}
 }
 
@@ -222,7 +231,7 @@ func TestSetupParseWithClientAuth(t *testing.T) {
 	c := caddy.NewTestController("", params)
 	err := setupTLS(c)
 	if err == nil {
-		t.Errorf("Expected an error, but no error returned")
+		t.Error("Expected an error, but no error returned")
 	}
 
 	noCAs, twoCAs := []string{}, []string{"client_ca.crt", "client2_ca.crt"}