case typeNewSessionTicket:
		if c.vers == VersionTLS13 {
			m = new(newSessionTicketMsgTLS13)
		} else {
			m = new(newSessionTicketMsg)
		}
	case typeCertificate:
		if c.vers == VersionTLS13 {
			m = new(certificateMsgTLS13)
		} else {
			m = new(certificateMsg)
		}
	case typeCertificateRequest:
		if c.vers == VersionTLS13 {
			m = new(certificateRequestMsgTLS13)
		} else {

		Certificates: testConfig.Certificates,
		MaxVersion:   VersionTLS13,
	}
	clientConfig := &Config{
		InsecureSkipVerify: true,
		MinVersion:         VersionTLS12,
	}
	state, _, err := testHandshake(t, clientConfig, serverConfig)
	if err != nil {
		t.Fatalf("handshake failed: %s", err)
	}
	if state.Version != VersionTLS13 {
		t.Fatalf("incorrect version %x, should be %x", state.Version, VersionTLS11)

			SupportedVersions: []uint16{VersionTLS13},
		}, "not valid for requested server name"},
		{ecdsaCert, &ClientHelloInfo{
			SignatureSchemes:  []SignatureScheme{ECDSAWithP384AndSHA384},
			SupportedVersions: []uint16{VersionTLS13},
		}, "signature algorithms"},
		{pkcs1Cert, &ClientHelloInfo{
			SignatureSchemes:  []SignatureScheme{PSSWithSHA256, ECDSAWithP256AndSHA256},
			SupportedVersions: []uint16{VersionTLS13},

}

func TestDowngradeCanary(t *testing.T) {
	if err := testDowngradeCanary(t, VersionTLS13, VersionTLS12); err == nil {
		t.Errorf("downgrade from TLS 1.3 to TLS 1.2 was not detected")
	}
	if testing.Short() {
		t.Skip("skipping the rest of the checks in short mode")
	}
	if err := testDowngradeCanary(t, VersionTLS13, VersionTLS11); err == nil {
		t.Errorf("downgrade from TLS 1.3 to TLS 1.1 was not detected")
	}

	"internal/godebug"
	"io"
	"net"
	"slices"
	"strings"
	"sync"
	"time"
	_ "unsafe" // for linkname
)

const (
	VersionTLS10 = 0x0301
	VersionTLS11 = 0x0302
	VersionTLS12 = 0x0303
	VersionTLS13 = 0x0304

	// Deprecated: SSLv3 is cryptographically broken, and is no longer
	// supported by this package. See golang.org/issue/32716.
	VersionSSL30 = 0x0300
)

				}
			}
		}
	}

	minTLSVersion, err := cliflag.TLSVersion(kc.TLSMinVersion)
	if err != nil {
		return nil, err
	}

	if minTLSVersion == tls.VersionTLS13 {
		if len(tlsCipherSuites) != 0 {
			klog.InfoS("Warning: TLS 1.3 cipher suites are not configurable, ignoring --tls-cipher-suites")
		}
	}

	tlsOptions := &server.TLSOptions{
		Config: &tls.Config{