Merge pull request #26 from ponzu-cms/ponzu-dev

[tooling] Add Go command flag, auto-generate self-signed SSL for development

1 files changed, 148 insertions, 0 deletions

diff --git a/system/tls/devcerts.go b/system/tls/devcerts.go
new file mode 100644
index 0000000..b41f099
--- /dev/null
+++ b/system/tls/devcerts.go
@@ -0,0 +1,148 @@
+// 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.
+
+// Modified 2016 by Steve Manuel, Boss Sauce Creative, LLC
+// All modifications are relicensed under the same BSD license
+// found in the LICENSE file.
+
+// Generate a self-signed X.509 certificate for a TLS server. Outputs to
+// 'devcerts/cert.pem' and 'devcerts/key.pem' and will overwrite existing files.
+
+package tls
+
+import (
+	"crypto/ecdsa"
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/pem"
+	"fmt"
+	"log"
+	"math/big"
+	"net"
+	"os"
+	"path/filepath"
+	"time"
+
+	"github.com/ponzu-cms/ponzu/system/db"
+)
+
+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 setupDev() {
+	var priv interface{}
+	var err error
+
+	priv, err = rsa.GenerateKey(rand.Reader, 2048)
+
+	if err != nil {
+		log.Fatalf("failed to generate private key: %s", err)
+	}
+
+	notBefore := time.Now()
+	notAfter := notBefore.Add(time.Hour * 24 * 30) // valid for 30 days
+
+	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{"Ponzu Dev Server"},
+		},
+		NotBefore: notBefore,
+		NotAfter:  notAfter,
+
+		KeyUsage:              x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
+		BasicConstraintsValid: true,
+	}
+
+	hosts := []string{"localhost", "0.0.0.0"}
+	domain := db.ConfigCache("domain")
+	if domain != "" {
+		hosts = append(hosts, domain)
+	}
+
+	for _, h := range hosts {
+		if ip := net.ParseIP(h); ip != nil {
+			template.IPAddresses = append(template.IPAddresses, ip)
+		} else {
+			template.DNSNames = append(template.DNSNames, h)
+		}
+	}
+
+	// make all certs CA
+	template.IsCA = true
+	template.KeyUsage |= x509.KeyUsageCertSign
+
+	derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, publicKey(priv), priv)
+	if err != nil {
+		log.Fatalln("Failed to create certificate:", err)
+	}
+
+	// overwrite/create directory for devcerts
+	pwd, err := os.Getwd()
+	if err != nil {
+		log.Fatalln("Couldn't find working directory to locate or save dev certificates:", err)
+	}
+
+	vendorTLSPath := filepath.Join(pwd, "cmd", "ponzu", "vendor", "github.com", "ponzu-cms", "ponzu", "system", "tls")
+	devcertsPath := filepath.Join(vendorTLSPath, "devcerts")
+
+	// clear all old certs if found
+	err = os.RemoveAll(devcertsPath)
+	if err != nil {
+		log.Fatalln("Failed to remove old files from dev certificate directory:", err)
+	}
+
+	err = os.Mkdir(devcertsPath, os.ModePerm|os.ModePerm)
+	if err != nil {
+		log.Fatalln("Failed to create directory to locate or save dev certificates:", err)
+	}
+
+	certOut, err := os.Create(filepath.Join(devcertsPath, "cert.pem"))
+	if err != nil {
+		log.Fatalln("Failed to open devcerts/cert.pem for writing:", err)
+	}
+	pem.Encode(certOut, &pem.Block{Type: "CERTIFICATE", Bytes: derBytes})
+	certOut.Close()
+
+	keyOut, err := os.OpenFile(filepath.Join(devcertsPath, "key.pem"), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
+	if err != nil {
+		log.Fatalln("Failed to open devcerts/key.pem for writing:", err)
+		return
+	}
+	pem.Encode(keyOut, pemBlockForKey(priv))
+	keyOut.Close()
+}