/
main.go
124 lines (121 loc) · 3.02 KB
/
main.go
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package main
import (
"crypto/rand"
"crypto/rsa"
"crypto/tls"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"fmt"
"io/ioutil"
"math/big"
"net"
"net/http"
"os"
"time"
)
func main() {
serverCert, serverKey, err := generate()
if err != nil {
fmt.Printf("error generating server certificate: %v", err)
os.Exit(1)
}
fmt.Println("Server Certificate:")
fmt.Printf("%s\n", serverCert)
fmt.Println("Server Key:")
fmt.Printf("%s\n", serverKey)
}
func generate() (cert []byte, privateKey []byte, err error) {
serialNumber, err := rand.Int(rand.Reader, big.NewInt(27))
if err != nil {
return cert, privateKey, err
}
notBefore := time.Now()
ca := &x509.Certificate{
SerialNumber: serialNumber,
Subject: pkix.Name{
Organization: []string{"example.com"},
},
NotBefore: notBefore,
NotAfter: notBefore.Add(time.Hour * 24 * 365),
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
BasicConstraintsValid: true,
IPAddresses: []net.IP{net.ParseIP("127.0.0.1")},
}
rsaKey, err := rsa.GenerateKey(rand.Reader, 2048)
if err != nil {
return cert, privateKey, err
}
DER, err := x509.CreateCertificate(rand.Reader, ca, ca, &rsaKey.PublicKey, rsaKey)
if err != nil {
return cert, privateKey, err
}
b := pem.Block{
Type: "CERTIFICATE",
Bytes: DER,
}
cert = pem.EncodeToMemory(&b)
privateKey = pem.EncodeToMemory(
&pem.Block{
Type: "RSA PRIVATE KEY",
Bytes: x509.MarshalPKCS1PrivateKey(rsaKey),
})
return cert, privateKey, nil
}
func client(caCert []byte, ClientCert tls.Certificate) (err error) {
certPool := x509.NewCertPool()
certPool.AppendCertsFromPEM(caCert)
client := &http.Client{
Transport: &http.Transport{
TLSClientConfig: &tls.Config{
RootCAs: certPool,
Certificates: []tls.Certificate{ClientCert},
},
},
}
resp, err := client.Get("https://127.0.0.1:443")
if err != nil {
return err
}
defer resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
fmt.Printf("%s: %s", time.Now().Format(time.Stamp), body)
return err
}
func runServer(certFile string, key string, clientCert []byte) (err error) {
fmt.Println("starting HTTP server")
http.HandleFunc("/", hello)
server := &http.Server{
Addr: ":443",
Handler: nil,
}
cert, err := tls.LoadX509KeyPair(certFile, key)
if err != nil {
return err
}
clientCertPool := x509.NewCertPool()
clientCertPool.AppendCertsFromPEM(clientCert)
tlsConfig := &tls.Config{
Certificates: []tls.Certificate{cert},
ClientAuth: tls.RequireAndVerifyClientCert,
ClientCAs: clientCertPool,
}
if err != nil {
return err
}
conn, err := net.Listen("tcp", server.Addr)
listener := tls.NewListener(conn, tlsConfig)
err = server.Serve(listener)
if err != nil {
return err
}
return nil
}
func hello(w http.ResponseWriter, r *http.Request) {
fmt.Printf("%s: Ping\n", time.Now().Format(time.Stamp))
fmt.Fprintf(w, "Pong\n")
}