Simple Golang HTTPS/TLS Examples https://gist.github.com/spikebike/2232102 http://echo.labstack.com/guide/

golang-tls.md

Generated private key

openssl genrsa -out server.key 2048

To generate a certificate

openssl req -new -x509 -key server.key -out server.pem -days 3650

https

package main

import (
    "io"
    "net/http"
    "log"
)

func HelloServer(w http.ResponseWriter, req *http.Request) {
    io.WriteString(w, "hello, world!\n")
}

func main() {
    http.HandleFunc("/hello", HelloServer)
    err := http.ListenAndServeTLS(":443", "cert.pem", "key.pem", nil)
    if err != nil {
        log.Fatal("ListenAndServe: ", err)
    }
}

Hint: visit, please do not forget to use https begins,otherwise chrome will download a file as follows:

dotcoo-air:tls dotcoo$ cat /Users/dotcoo/Downloads/hello | xxd
0000000: 1503 0100 0202 0a                        .......

TLS Server

package main

import (
    "log"
    "crypto/tls"
    "net"
    "bufio"
)

func main() {
    log.SetFlags(log.Lshortfile)

    cer, err := tls.LoadX509KeyPair("server.pem", "server.key")
    if err != nil {
        log.Println(err)
        return
    }

    config := &tls.Config{Certificates: []tls.Certificate{cer}}
    ln, err := tls.Listen("tcp", ":443", config) 
    if err != nil {
        log.Println(err)
        return
    }
    defer ln.Close()

    for {
        conn, err := ln.Accept()
        if err != nil {
            log.Println(err)
            continue
        }
        go handleConnection(conn)
    }
}

func handleConnection(conn net.Conn) {
    defer conn.Close()
    r := bufio.NewReader(conn)
    for {
        msg, err := r.ReadString('\n')
        if err != nil {
            log.Println(err)
            return
        }

        println(msg)

        n, err := conn.Write([]byte("world\n"))
        if err != nil {
            log.Println(n, err)
            return
        }
    }
}

TLS Client

package main

import (
    "log"
    "crypto/tls"
)

func main() {
    log.SetFlags(log.Lshortfile)

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

    conn, err := tls.Dial("tcp", "127.0.0.1:8000", conf)
    if err != nil {
        log.Println(err)
        return
    }
    defer conn.Close()

    n, err := conn.Write([]byte("hello\n"))
    if err != nil {
        log.Println(n, err)
        return
    }

    buf := make([]byte, 100)
    n, err = conn.Read(buf)
    if err != nil {
        log.Println(n, err)
        return
    }

    println(string(buf[:n]))
}

Links

• http://superuser.com/a/226229/205366

The keys generated from the openssl command dont match those in http.ListenAndServeTLS(":443", "cert.pem", "key.pem", nil). How can I generate the right files?