mirror of https://github.com/namecoin/ncdns
You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
261 lines
8.2 KiB
Go
261 lines
8.2 KiB
Go
// nolint: gofmt, goimports
|
|
|
|
// Copyright 2009 The Go Authors. All rights reserved.
|
|
// Dehydrated certificate modifications Copyright 2015-2017 Jeremy Rand. All
|
|
// rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
|
|
// Generate a self-signed X.509 certificate for a TLS server. Outputs to
|
|
// 'cert.pem' and 'key.pem' and will overwrite existing files.
|
|
|
|
// This code has been modified from the stock Go code to generate
|
|
// "dehydrated certificates", suitable for inclusion in a Namecoin name.
|
|
|
|
// Last rebased against Go 1.8.3.
|
|
// Future rebases need to rebase all of the main, parent, and falseHost flows.
|
|
|
|
package main
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/ecdsa"
|
|
"crypto/elliptic"
|
|
"crypto/rand"
|
|
"crypto/rsa"
|
|
"crypto/x509"
|
|
"crypto/x509/pkix"
|
|
"encoding/base64"
|
|
"encoding/pem"
|
|
"flag"
|
|
"fmt"
|
|
"log"
|
|
"math/big"
|
|
//"net"
|
|
"os"
|
|
//"strings"
|
|
"time"
|
|
|
|
"github.com/namecoin/ncdns/certdehydrate"
|
|
)
|
|
|
|
var (
|
|
//host = flag.String("host", "", "Comma-separated hostnames and IPs to generate a certificate for")
|
|
host = flag.String("host", "", "Hostname to generate a certificate for (only use one)")
|
|
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")
|
|
ecdsaCurve = flag.String("ecdsa-curve", "P256", "ECDSA curve to use to generate a key. Valid values are P224, P256, P384, P521")
|
|
falseHost = flag.String("false-host", "", "(Optional) Generate a false cert for this host; used to test x.509 implementations for safety regarding handling of the CA flag and KeyUsage")
|
|
useCA = flag.Bool("use-ca", false, "Use a CA instead of self-signing")
|
|
parentKey = flag.String("parent-key", "", "(Optional) Path to existing CA private key to sign with")
|
|
)
|
|
|
|
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)
|
|
log.Fatalf("Missing required --ecdsa-curve parameter")
|
|
case "P224": // nolint: goconst
|
|
priv, err = ecdsa.GenerateKey(elliptic.P224(), rand.Reader)
|
|
case "P256": // nolint: goconst
|
|
priv, err = ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
|
|
case "P384": // nolint: goconst
|
|
priv, err = ecdsa.GenerateKey(elliptic.P384(), rand.Reader)
|
|
case "P521": // nolint: goconst
|
|
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)
|
|
|
|
timestampPrecision := int64(5 * 60)
|
|
|
|
notBeforeFloored := time.Unix((notBefore.Unix()/timestampPrecision)*timestampPrecision, 0)
|
|
notAfterFloored := time.Unix((notAfter.Unix()/timestampPrecision)*timestampPrecision, 0)
|
|
|
|
//serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
|
|
//serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
|
|
// Serial components
|
|
pubkeyBytes, err := x509.MarshalPKIXPublicKey(publicKey(priv))
|
|
if err != nil {
|
|
log.Fatalf("failed to marshal public key: %s", err)
|
|
}
|
|
pubkeyB64 := base64.StdEncoding.EncodeToString(pubkeyBytes)
|
|
notBeforeScaled := notBeforeFloored.Unix() / timestampPrecision
|
|
notAfterScaled := notAfterFloored.Unix() / timestampPrecision
|
|
|
|
// Calculate serial
|
|
serialDehydrated := certdehydrate.DehydratedCertificate{
|
|
PubkeyB64: pubkeyB64,
|
|
NotBeforeScaled: notBeforeScaled,
|
|
NotAfterScaled: notAfterScaled,
|
|
}
|
|
serialNumber := big.NewInt(1)
|
|
serialNumberBytes, err := serialDehydrated.SerialNumber(*host)
|
|
if err != nil {
|
|
log.Fatalf("failed to generate serial number: %s", err)
|
|
}
|
|
serialNumber.SetBytes(serialNumberBytes)
|
|
|
|
template := x509.Certificate{
|
|
SerialNumber: serialNumber,
|
|
Subject: pkix.Name{
|
|
//Organization: []string{"Acme Co"},
|
|
CommonName: *host,
|
|
SerialNumber: "Namecoin TLS Certificate",
|
|
},
|
|
//NotBefore: notBefore,
|
|
NotBefore: notBeforeFloored,
|
|
//NotAfter: notAfter,
|
|
NotAfter: notAfterFloored,
|
|
|
|
// x509.KeyUsageKeyEncipherment is used for RSA key exchange,
|
|
// but not DHE/ECDHE key exchange. Since everyone should be
|
|
// using ECDHE (due to forward secrecy), we disallow
|
|
// x509.KeyUsageKeyEncipherment in our template.
|
|
//KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
|
|
KeyUsage: 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)
|
|
template.DNSNames = append(template.DNSNames, *host)
|
|
// }
|
|
//}
|
|
|
|
//if *isCA {
|
|
// template.IsCA = true
|
|
// template.KeyUsage |= x509.KeyUsageCertSign
|
|
//}
|
|
|
|
var parent x509.Certificate
|
|
var parentPriv interface{}
|
|
|
|
if *useCA {
|
|
parent, parentPriv = getParent()
|
|
} else {
|
|
parent, parentPriv = template, priv
|
|
}
|
|
|
|
//derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, publicKey(priv), priv)
|
|
derBytes, err := x509.CreateCertificate(rand.Reader, &template, &parent, publicKey(priv), parentPriv)
|
|
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")
|
|
|
|
if *useCA {
|
|
log.Print("SUCCESS. Place cert.pem and key.pem in your HTTPS server, and place the above JSON in the \"tls\" field for your Namecoin name.")
|
|
return
|
|
}
|
|
|
|
parsedResult, err := x509.ParseCertificate(derBytes)
|
|
if err != nil {
|
|
log.Fatal("failed to parse output cert: ", err)
|
|
}
|
|
|
|
dehydrated, err := certdehydrate.DehydrateCert(parsedResult)
|
|
if err != nil {
|
|
log.Fatal("failed to dehydrate result cert: ", err)
|
|
}
|
|
|
|
rehydrated, err := certdehydrate.RehydrateCert(dehydrated)
|
|
if err != nil {
|
|
log.Fatal("failed to rehydrate result cert: ", err)
|
|
}
|
|
|
|
rehydratedDerBytes, err := certdehydrate.FillRehydratedCertTemplate(*rehydrated, *host)
|
|
if err != nil {
|
|
log.Fatal("failed to fill rehydrated result cert: ", err)
|
|
}
|
|
|
|
if !bytes.Equal(derBytes, rehydratedDerBytes) {
|
|
log.Fatal("ERROR: The cert did not rehydrate to an identical form. This is a bug; do not use the generated certificate.")
|
|
}
|
|
|
|
log.Print("Your Namecoin cert is: {\"d8\":", dehydrated, "}")
|
|
|
|
log.Print("SUCCESS: The cert rehydrated to an identical form. Place the generated files in your HTTPS server, and place the above JSON in the \"tls\" field for your Namecoin name.")
|
|
|
|
if len(*falseHost) > 0 {
|
|
doFalseHost(template, priv)
|
|
}
|
|
}
|