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Add TLS support

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This commit is contained in:
James Mills 2017-02-13 00:18:27 -08:00
parent 48e230ab23
commit 48590e76b1
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GPG Key ID: AC4C014F1440EBD6
6 changed files with 316 additions and 4 deletions
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18
examples/hello/cert.pem Normal file
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@ -0,0 +1,18 @@
-----BEGIN CERTIFICATE-----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-----END CERTIFICATE-----

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examples/hello/gencerts Executable file
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161
examples/hello/gencerts.go Normal file
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@ -0,0 +1,161 @@
// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build ignore
// Generate a self-signed X.509 certificate for a TLS server. Outputs to
// 'cert.pem' and 'key.pem' and will overwrite existing files.
package main
import (
"crypto/ecdsa"
"crypto/elliptic"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"flag"
"fmt"
"log"
"math/big"
"net"
"os"
"strings"
"time"
)
var (
host = flag.String("host", "", "Comma-separated hostnames and IPs to generate a certificate for")
validFrom = flag.String("start-date", "", "Creation date formatted as Jan 1 15:04:05 2011")
validFor = flag.Duration("duration", 365*24*time.Hour, "Duration that certificate is valid for")
isCA = flag.Bool("ca", false, "whether this cert should be its own Certificate Authority")
rsaBits = flag.Int("rsa-bits", 2048, "Size of RSA key to generate. Ignored if --ecdsa-curve is set")
ecdsaCurve = flag.String("ecdsa-curve", "", "ECDSA curve to use to generate a key. Valid values are P224, P256, P384, P521")
)
func publicKey(priv interface{}) interface{} {
switch k := priv.(type) {
case *rsa.PrivateKey:
return &k.PublicKey
case *ecdsa.PrivateKey:
return &k.PublicKey
default:
return nil
}
}
func pemBlockForKey(priv interface{}) *pem.Block {
switch k := priv.(type) {
case *rsa.PrivateKey:
return &pem.Block{Type: "RSA PRIVATE KEY", Bytes: x509.MarshalPKCS1PrivateKey(k)}
case *ecdsa.PrivateKey:
b, err := x509.MarshalECPrivateKey(k)
if err != nil {
fmt.Fprintf(os.Stderr, "Unable to marshal ECDSA private key: %v", err)
os.Exit(2)
}
return &pem.Block{Type: "EC PRIVATE KEY", Bytes: b}
default:
return nil
}
}
func main() {
flag.Parse()
if len(*host) == 0 {
log.Fatalf("Missing required --host parameter")
}
var priv interface{}
var err error
switch *ecdsaCurve {
case "":
priv, err = rsa.GenerateKey(rand.Reader, *rsaBits)
case "P224":
priv, err = ecdsa.GenerateKey(elliptic.P224(), rand.Reader)
case "P256":
priv, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
case "P384":
priv, err = ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
case "P521":
priv, err = ecdsa.GenerateKey(elliptic.P521(), rand.Reader)
default:
fmt.Fprintf(os.Stderr, "Unrecognized elliptic curve: %q", *ecdsaCurve)
os.Exit(1)
}
if err != nil {
log.Fatalf("failed to generate private key: %s", err)
}
var notBefore time.Time
if len(*validFrom) == 0 {
notBefore = time.Now()
} else {
notBefore, err = time.Parse("Jan 2 15:04:05 2006", *validFrom)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to parse creation date: %s\n", err)
os.Exit(1)
}
}
notAfter := notBefore.Add(*validFor)
serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
if err != nil {
log.Fatalf("failed to generate serial number: %s", err)
}
template := x509.Certificate{
SerialNumber: serialNumber,
Subject: pkix.Name{
Organization: []string{"Acme Co"},
},
NotBefore: notBefore,
NotAfter: notAfter,
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
BasicConstraintsValid: true,
}
hosts := strings.Split(*host, ",")
for _, h := range hosts {
if ip := net.ParseIP(h); ip != nil {
template.IPAddresses = append(template.IPAddresses, ip)
} else {
template.DNSNames = append(template.DNSNames, h)
}
}
if *isCA {
template.IsCA = true
template.KeyUsage |= x509.KeyUsageCertSign
}
derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, publicKey(priv), priv)
if err != nil {
log.Fatalf("Failed to create certificate: %s", err)
}
certOut, err := os.Create("cert.pem")
if err != nil {
log.Fatalf("failed to open cert.pem for writing: %s", err)
}
pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
certOut.Close()
log.Print("written cert.pem\n")
keyOut, err := os.OpenFile("key.pem", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
if err != nil {
log.Print("failed to open key.pem for writing:", err)
return
}
pem.Encode(keyOut, pemBlockForKey(priv))
keyOut.Close()
log.Print("written key.pem\n")
}

27
examples/hello/key.pem Normal file
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@ -0,0 +1,27 @@
-----BEGIN RSA PRIVATE KEY-----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-----END RSA PRIVATE KEY-----

43
examples/hello/main.go
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@ -2,6 +2,7 @@ package main
import (
"log"
"sync"
"github.com/prologic/go-gopher"
)
@ -12,6 +13,11 @@ func index(w gopher.ResponseWriter, r *gopher.Request) {
Type: gopher.DIRECTORY,
Selector: "/hello",
Description: "hello",
// TLS Resource
Host: "localhost",
Port: 73,
Extras: []string{"TLS"},
},
)
w.WriteItem(
@ -41,8 +47,37 @@ func foo(w gopher.ResponseWriter, r *gopher.Request) {
}
func main() {
gopher.HandleFunc("/", index)
gopher.HandleFunc("/foo", foo)
gopher.HandleFunc("/hello", hello)
log.Fatal(gopher.ListenAndServe("localhost:70", nil))
wg := &sync.WaitGroup{}
// Standard Server
wg.Add(1)
go func() {
mux := gopher.NewServeMux()
mux.HandleFunc("/", index)
mux.HandleFunc("/foo", foo)
mux.HandleFunc("/hello", hello)
log.Fatal(gopher.ListenAndServe("localhost:70", mux))
wg.Done()
}()
// TLS server
wg.Add(1)
go func() {
mux := gopher.NewServeMux()
mux.HandleFunc("/", index)
mux.HandleFunc("/foo", foo)
mux.HandleFunc("/hello", hello)
log.Fatal(
gopher.ListenAndServeTLS(
"localhost:73", "cert.pem", "key.pem", mux,
),
)
wg.Done()
}()
wg.Wait()
}

71
gopher.go
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@ -10,6 +10,7 @@ package gopher
import (
"bufio"
"bytes"
"crypto/rand"
"crypto/tls"
"encoding/json"
"errors"
@ -571,6 +572,41 @@ func (s Server) ListenAndServe() error {
return s.Serve(ln)
}
// ListenAndServeTLS listens on the TCP network address srv.Addr and
// then calls Serve to handle requests on incoming TLS connections.
// Accepted connections are configured to enable TCP keep-alives.
//
// Filenames containing a certificate and matching private key for the
// server must be provided if neither the Server's TLSConfig.Certificates
// nor TLSConfig.GetCertificate are populated. If the certificate is
// signed by a certificate authority, the certFile should be the
// concatenation of the server's certificate, any intermediates, and
// the CA's certificate.
//
// If srv.Addr is blank, ":gophers" is used (port 73).
//
// ListenAndServeTLS always returns a non-nil error.
func (s *Server) ListenAndServeTLS(certFile, keyFile string) error {
addr := s.Addr
if addr == "" {
addr = ":73"
}
cert, err := tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
log.Fatalf("server: loadkeys: %s", err)
}
config := tls.Config{Certificates: []tls.Certificate{cert}}
config.Rand = rand.Reader
ln, err := tls.Listen("tcp", addr, &config)
if err != nil {
log.Fatalf("server: listen: %s", err)
}
return s.Serve(ln)
}
// Serve ...
func (s Server) Serve(l net.Listener) error {
defer l.Close()
@ -582,6 +618,7 @@ func (s Server) Serve(l net.Listener) error {
for {
rw, err := l.Accept()
if err != nil {
fmt.Errorf("error acceptig new client: %s", err)
return err
}
@ -745,6 +782,40 @@ func ListenAndServe(addr string, handler Handler) error {
return server.ListenAndServe()
}
// ListenAndServeTLS acts identically to ListenAndServe, except that it
// expects TLS connections. Additionally, files containing a certificate and
// matching private key for the server must be provided. If the certificate
// is signed by a certificate authority, the certFile should be the
// concatenation of the server's certificate, any intermediates,
// and the CA's certificate.
//
// A trivial example server is:
//
// import (
// "log"
//
// "github.com/prologic/go-gopher",
// )
//
// func HelloServer(w gopher.ResponseWriter, req *gopher.Request) {
// w.WriteInfo("hello, world!")
// }
//
// func main() {
// gopher.HandleFunc("/", handler)
// log.Printf("About to listen on 73. Go to gophers://127.0.0.1:73/")
// err := gopher.ListenAndServeTLS(":73", "cert.pem", "key.pem", nil)
// log.Fatal(err)
// }
//
// One can use generate_cert.go in crypto/tls to generate cert.pem and key.pem.
//
// ListenAndServeTLS always returns a non-nil error.
func ListenAndServeTLS(addr, certFile, keyFile string, handler Handler) error {
server := &Server{Addr: addr, Handler: handler}
return server.ListenAndServeTLS(certFile, keyFile)
}
// ServeMux is a Gopher request multiplexer.
// It matches the URL of each incoming request against a list of registered
// patterns and calls the handler for the pattern that