check client TLS

gistfile1.txt

$ go run main.go | jq .
{
  "given_cipher_suites": [
    "TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256",
    "TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384",
    "TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256",
    "TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384",
    "TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256",
    "TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256",
    "TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA",
    "TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA",
    "TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA",
    "TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA",
    "TLS_RSA_WITH_AES_128_GCM_SHA256",
    "TLS_RSA_WITH_AES_256_GCM_SHA384",
    "TLS_RSA_WITH_AES_128_CBC_SHA",
    "TLS_RSA_WITH_AES_256_CBC_SHA",
    "TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA",
    "TLS_RSA_WITH_3DES_EDE_CBC_SHA",
    "TLS_AES_128_GCM_SHA256",
    "TLS_CHACHA20_POLY1305_SHA256",
    "TLS_AES_256_GCM_SHA384"
  ],
  "ephemeral_keys_supported": true,
  "session_ticket_supported": false,
  "tls_compression_supported": false,
  "unknown_cipher_suite_supported": false,
  "beast_vuln": false,
  "able_to_detect_n_minus_one_splitting": false,
  "insecure_cipher_suites": {},
  "tls_version": "TLS 1.3",
  "rating": "Probably Okay"
}

main.go

package main

import (
	"fmt"
	"io/ioutil"
	"net/http"
)

func main() {
	hc := http.DefaultClient
	req, err := http.NewRequest(http.MethodGet, "https://www.howsmyssl.com/a/check", nil)
	if err != nil {
		fmt.Printf("failed to create request: %s", err)
		return
	}
	resp, err := hc.Do(req)
	if err != nil {
		fmt.Printf("failed to get response: %s", err)
		return
	}
	b, err := ioutil.ReadAll(resp.Body)
	if err != nil {
		fmt.Printf("failed to read response body: %s", err)
		return
	}

	fmt.Println(string(b))
}