_

test.go

package main

import (
	"crypto/tls"
	"fmt"
	"os"
)

func dial(addr string, conf *tls.Config) {
	c, err := tls.Dial("tcp", addr+":443", conf)
	if err != nil {
		fmt.Println(err.Error())
		return
	}
	if err := c.Handshake(); err != nil {
		fmt.Println(err.Error())
	}
	fmt.Println("success")
}

func main() {
	var addr = os.Args[1]
	var fake = os.Args[2]
	fmt.Println("dialing to: ", addr)
	fmt.Println("indication: ", fake)

	conf := &tls.Config{
		ServerName:         fake,
		InsecureSkipVerify: true,
	}

	println("Dialing with 4 curves")
	dial(addr, conf)

	var pref []tls.CurveID
	for i := 0; i < 1000; i++ {
		pref = append(pref, tls.CurveP256)
	}
	conf.CurvePreferences = pref

	println("Dialing with 1000 curves")
	dial(addr, conf)
}