a1ddc6cab08c5331

// import tls "github.com/refraction-networking/utls"
tcpConn, err := net.Dial("tcp", "tlsfingerprint.io:443")
if err != nil {
	fmt.Printf("net.Dial() failed: %+v\n", err)
	return
}

config := tls.Config{ServerName: "tlsfingerprint.io"}
// This fingerprint includes feature(s), not fully supported by TLS.
// uTLS client with this fingerprint will only be able to to talk to servers,
// that also do not support those features. 
tlsConn := tls.UClient(tcpConn, &tlsConfig, tls.HelloCustom)
clientHelloSpec := tls.ClientHelloSpec {
	CipherSuites: []uint16{
		0x0060,
		0x0061,
		0x0062,
		0x0063,
		0x0064,
		0x0065,
		0x0066,
		0x0067,
		0x0068,
		0x0069,
		0x006a,
		0x006b,
		0x006c,
		0x006d,
		0x006e,
		0x006f,
		0x0070,
		0x0071,
		0x0072,
		0x0073,
		0x0074,
		0x0075,
		0x0076,
		0x0077,
		0x0078,
		0x0079,
		0x007a,
		0x007b,
		0x007c,
		0x007d,
		0x007e,
		0x007f,
	},
	CompressionMethods: []byte{
		0x00, // compressionNone
	},
	Extensions: []tls.TLSExtension{
code generation error: short sig_algs	},
}
tlsConn.ApplyPreset(&clientHelloSpec)
        
n, err = tlsConn.Write([]byte("Hello, World!"))
// or tlsConn.Handshake() for better control