disable insecure cipher suites

This commit removes the following cipher suites that are known to be insecure:

TLS_RSA_WITH_RC4_128_SHA
TLS_RSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_ECDSA_WITH_RC4_128_SHA
TLS_ECDHE_RSA_WITH_RC4_128_SHA
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256

And this commit deletes the tlsVersions of tls1.0 and tls1.1. The tls1.2 is the minimal supported tls version for creating a safer tls configuration.

Signed-off-by: david.bao <baojn1998@163.com>

registry/proxy/proxyblobstore_test.go

@@ -76,7 +76,6 @@ func (sbs statsBlobStore) ServeBlob(ctx context.Context, w http.ResponseWriter,
 }
 
 func (sbs statsBlobStore) Stat(ctx context.Context, dgst digest.Digest) (distribution.Descriptor, error) {
-
 	sbsMu.Lock()
 	sbs.stats["stat"]++
 	sbsMu.Unlock()

registry/registry.go

@@ -37,22 +37,16 @@ import (
 // a map of TLS cipher suite names to constants in https://golang.org/pkg/crypto/tls/#pkg-constants
 var cipherSuites = map[string]uint16{
 	// TLS 1.0 - 1.2 cipher suites
-	"TLS_RSA_WITH_RC4_128_SHA":                      tls.TLS_RSA_WITH_RC4_128_SHA,
 	"TLS_RSA_WITH_3DES_EDE_CBC_SHA":                 tls.TLS_RSA_WITH_3DES_EDE_CBC_SHA,
 	"TLS_RSA_WITH_AES_128_CBC_SHA":                  tls.TLS_RSA_WITH_AES_128_CBC_SHA,
 	"TLS_RSA_WITH_AES_256_CBC_SHA":                  tls.TLS_RSA_WITH_AES_256_CBC_SHA,
-	"TLS_RSA_WITH_AES_128_CBC_SHA256":               tls.TLS_RSA_WITH_AES_128_CBC_SHA256,
 	"TLS_RSA_WITH_AES_128_GCM_SHA256":               tls.TLS_RSA_WITH_AES_128_GCM_SHA256,
 	"TLS_RSA_WITH_AES_256_GCM_SHA384":               tls.TLS_RSA_WITH_AES_256_GCM_SHA384,
-	"TLS_ECDHE_ECDSA_WITH_RC4_128_SHA":              tls.TLS_ECDHE_ECDSA_WITH_RC4_128_SHA,
 	"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA":          tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
 	"TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA":          tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
-	"TLS_ECDHE_RSA_WITH_RC4_128_SHA":                tls.TLS_ECDHE_RSA_WITH_RC4_128_SHA,
 	"TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA":           tls.TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA,
 	"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA":            tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
 	"TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA":            tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
-	"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256":       tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256,
-	"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256":         tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256,
 	"TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256":         tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
 	"TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256":       tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
 	"TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384":         tls.TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384,
@@ -82,8 +76,6 @@ var defaultCipherSuites = []uint16{
 var defaultTLSVersionStr = "tls1.2"
 var tlsVersions = map[string]uint16{
 	// user specified values
-	"tls1.0": tls.VersionTLS10,
-	"tls1.1": tls.VersionTLS11,
 	"tls1.2": tls.VersionTLS12,
 	"tls1.3": tls.VersionTLS13,
 }
@@ -230,11 +222,18 @@ func (registry *Registry) ListenAndServe() error {
 		}
 		dcontext.GetLogger(registry.app).Infof("restricting TLS version to %s or higher", config.HTTP.TLS.MinimumTLS)
 
-		tlsCipherSuites, err := getCipherSuites(config.HTTP.TLS.CipherSuites)
+		var tlsCipherSuites []uint16
+		// configuring cipher suites are no longer supported after the tls1.3.
+		// (https://go.dev/blog/tls-cipher-suites)
+		if tlsMinVersion > tls.VersionTLS12 {
+			dcontext.GetLogger(registry.app).Warnf("restricting TLS cipher suites to empty. Because configuring cipher suites is no longer supported in %s", config.HTTP.TLS.MinimumTLS)
+		} else {
+			tlsCipherSuites, err = getCipherSuites(config.HTTP.TLS.CipherSuites)
 			if err != nil {
 				return err
 			}
 			dcontext.GetLogger(registry.app).Infof("restricting TLS cipher suites to: %s", strings.Join(getCipherSuiteNames(tlsCipherSuites), ","))
+		}
 
 		tlsConf := &tls.Config{
 			ClientAuth:               tls.NoClientCert,

registry/registry_test.go

@@ -135,7 +135,10 @@ func TestGetCipherSuite(t *testing.T) {
 		)
 	}
 
-	resp, err = getCipherSuites([]string{"TLS_RSA_WITH_AES_128_CBC_SHA", "TLS_AES_128_GCM_SHA256"})
+	resp, err = getCipherSuites([]string{
+		"TLS_RSA_WITH_AES_128_CBC_SHA",
+		"TLS_AES_128_GCM_SHA256",
+	})
 	if err != nil || len(resp) != 2 ||
 		resp[0] != tls.TLS_RSA_WITH_AES_128_CBC_SHA || resp[1] != tls.TLS_AES_128_GCM_SHA256 {
 		t.Errorf("expected cipher suites %q, got %q",
@@ -148,6 +151,22 @@ func TestGetCipherSuite(t *testing.T) {
 	if err == nil {
 		t.Error("did not return expected error about unknown cipher suite")
 	}
+
+	var insecureCipherSuites = []string{
+		"TLS_RSA_WITH_RC4_128_SHA",
+		"TLS_RSA_WITH_AES_128_CBC_SHA256",
+		"TLS_ECDHE_ECDSA_WITH_RC4_128_SHA",
+		"TLS_ECDHE_RSA_WITH_RC4_128_SHA",
+		"TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256",
+		"TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256",
+	}
+
+	for _, suite := range insecureCipherSuites {
+		_, err = getCipherSuites([]string{suite})
+		if err == nil {
+			t.Errorf("Unexpected insecure cipher suite: %s", suite)
+		}
+	}
 }
 
 func buildRegistryTLSConfig(name, keyType string, cipherSuites []string) (*registryTLSConfig, error) {

registry/storage/purgeuploads_test.go

@@ -46,7 +46,7 @@ func TestPurgeGather(t *testing.T) {
 	fs, ctx := testUploadFS(t, uploadCount, "test-repo", time.Now())
 	uploadData, errs := getOutstandingUploads(ctx, fs)
 	if len(errs) != 0 {
-		t.Errorf("Unexepected errors: %q", errs)
+		t.Errorf("Unexpected errors: %q", errs)
 	}
 	if len(uploadData) != uploadCount {
 		t.Errorf("Unexpected upload file count: %d != %d", uploadCount, len(uploadData))