260 lines
7.7 KiB
Go
260 lines
7.7 KiB
Go
// Copyright 2018 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.
|
||
|
||
package main
|
||
|
||
import (
|
||
"crypto"
|
||
"crypto/ecdsa"
|
||
"crypto/elliptic"
|
||
"crypto/rand"
|
||
"crypto/rsa"
|
||
"crypto/sha1"
|
||
"crypto/x509"
|
||
"crypto/x509/pkix"
|
||
"encoding/asn1"
|
||
"encoding/pem"
|
||
"io/ioutil"
|
||
"log"
|
||
"math/big"
|
||
"net"
|
||
"os"
|
||
"os/exec"
|
||
"os/user"
|
||
"path/filepath"
|
||
"regexp"
|
||
"strconv"
|
||
"strings"
|
||
"time"
|
||
|
||
pkcs12 "software.sslmate.com/src/go-pkcs12"
|
||
)
|
||
|
||
var userAndHostname string
|
||
|
||
func init() {
|
||
u, _ := user.Current()
|
||
if u != nil {
|
||
userAndHostname = u.Username + "@"
|
||
}
|
||
out, _ := exec.Command("hostname").Output()
|
||
userAndHostname += strings.TrimSpace(string(out))
|
||
}
|
||
|
||
func (m *mkcert) makeCert(hosts []string) {
|
||
if m.caKey == nil {
|
||
log.Fatalln("ERROR: can't create new certificates because the CA key (rootCA-key.pem) is missing")
|
||
}
|
||
|
||
priv, err := m.generateKey(false)
|
||
fatalIfErr(err, "failed to generate certificate key")
|
||
pub := priv.(crypto.Signer).Public()
|
||
|
||
serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
|
||
serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
|
||
fatalIfErr(err, "failed to generate serial number")
|
||
|
||
tpl := &x509.Certificate{
|
||
SerialNumber: serialNumber,
|
||
Subject: pkix.Name{
|
||
Organization: []string{"mkcert development certificate"},
|
||
OrganizationalUnit: []string{userAndHostname},
|
||
},
|
||
|
||
NotAfter: time.Now().AddDate(10, 0, 0),
|
||
NotBefore: time.Now(),
|
||
|
||
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
|
||
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth},
|
||
BasicConstraintsValid: true,
|
||
}
|
||
for _, h := range hosts {
|
||
if ip := net.ParseIP(h); ip != nil {
|
||
tpl.IPAddresses = append(tpl.IPAddresses, ip)
|
||
} else {
|
||
tpl.DNSNames = append(tpl.DNSNames, h)
|
||
}
|
||
}
|
||
|
||
// IIS (the main target of PKCS #12 files), only shows the deprecated
|
||
// Common Name in the UI. See issue #115.
|
||
if m.pkcs12 {
|
||
tpl.Subject.CommonName = hosts[0]
|
||
}
|
||
|
||
cert, err := x509.CreateCertificate(rand.Reader, tpl, m.caCert, pub, m.caKey)
|
||
fatalIfErr(err, "failed to generate certificate")
|
||
|
||
certFile, keyFile, p12File := m.fileNames(hosts)
|
||
|
||
if !m.pkcs12 {
|
||
privDER, err := x509.MarshalPKCS8PrivateKey(priv)
|
||
fatalIfErr(err, "failed to encode certificate key")
|
||
err = ioutil.WriteFile(keyFile, pem.EncodeToMemory(
|
||
&pem.Block{Type: "PRIVATE KEY", Bytes: privDER}), 0600)
|
||
fatalIfErr(err, "failed to save certificate key")
|
||
|
||
err = ioutil.WriteFile(certFile, pem.EncodeToMemory(
|
||
&pem.Block{Type: "CERTIFICATE", Bytes: cert}), 0644)
|
||
fatalIfErr(err, "failed to save certificate key")
|
||
} else {
|
||
domainCert, _ := x509.ParseCertificate(cert)
|
||
pfxData, err := pkcs12.Encode(rand.Reader, priv, domainCert, []*x509.Certificate{m.caCert}, "changeit")
|
||
fatalIfErr(err, "failed to generate PKCS#12")
|
||
err = ioutil.WriteFile(p12File, pfxData, 0644)
|
||
fatalIfErr(err, "failed to save PKCS#12")
|
||
}
|
||
|
||
secondLvlWildcardRegexp := regexp.MustCompile(`(?i)^\*\.[0-9a-z_-]+$`)
|
||
log.Printf("\nCreated a new certificate valid for the following names 📜")
|
||
for _, h := range hosts {
|
||
log.Printf(" - %q", h)
|
||
if secondLvlWildcardRegexp.MatchString(h) {
|
||
log.Printf(" Warning: many browsers don't support second-level wildcards like %q ⚠️", h)
|
||
}
|
||
}
|
||
|
||
for _, h := range hosts {
|
||
if strings.HasPrefix(h, "*.") {
|
||
log.Printf("\nReminder: X.509 wildcards only go one level deep, so this won't match a.b.%s ℹ️", h[2:])
|
||
break
|
||
}
|
||
}
|
||
|
||
if !m.pkcs12 {
|
||
log.Printf("\nThe certificate is at \"%s\" and the key at \"%s\" ✅\n\n", certFile, keyFile)
|
||
} else {
|
||
log.Printf("\nThe PKCS#12 bundle is at \"%s\" ✅\n", p12File)
|
||
log.Printf("\nThe legacy PKCS#12 encryption password is the often hardcoded default \"changeit\" ℹ️\n\n")
|
||
}
|
||
}
|
||
|
||
func (m *mkcert) generateKey(rootCA bool) (crypto.PrivateKey, error) {
|
||
if m.ecdsa {
|
||
return ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
|
||
}
|
||
if rootCA {
|
||
return rsa.GenerateKey(rand.Reader, 3072)
|
||
}
|
||
return rsa.GenerateKey(rand.Reader, 2048)
|
||
}
|
||
|
||
func (m *mkcert) fileNames(hosts []string) (certFile, keyFile, p12File string) {
|
||
defaultName := strings.Replace(hosts[0], ":", "_", -1)
|
||
defaultName = strings.Replace(defaultName, "*", "_wildcard", -1)
|
||
if len(hosts) > 1 {
|
||
defaultName += "+" + strconv.Itoa(len(hosts)-1)
|
||
}
|
||
|
||
certFile = "./" + defaultName + ".pem"
|
||
if m.certFile != "" {
|
||
certFile = m.certFile
|
||
}
|
||
keyFile = "./" + defaultName + "-key.pem"
|
||
if m.keyFile != "" {
|
||
keyFile = m.keyFile
|
||
}
|
||
p12File = "./" + defaultName + ".p12"
|
||
if m.p12File != "" {
|
||
p12File = m.p12File
|
||
}
|
||
|
||
return
|
||
}
|
||
|
||
// loadCA will load or create the CA at CAROOT.
|
||
func (m *mkcert) loadCA() {
|
||
if _, err := os.Stat(filepath.Join(m.CAROOT, rootName)); os.IsNotExist(err) {
|
||
m.newCA()
|
||
} else {
|
||
log.Printf("Using the local CA at \"%s\" ✨\n", m.CAROOT)
|
||
}
|
||
|
||
certPEMBlock, err := ioutil.ReadFile(filepath.Join(m.CAROOT, rootName))
|
||
fatalIfErr(err, "failed to read the CA certificate")
|
||
certDERBlock, _ := pem.Decode(certPEMBlock)
|
||
if certDERBlock == nil || certDERBlock.Type != "CERTIFICATE" {
|
||
log.Fatalln("ERROR: failed to read the CA certificate: unexpected content")
|
||
}
|
||
m.caCert, err = x509.ParseCertificate(certDERBlock.Bytes)
|
||
fatalIfErr(err, "failed to parse the CA certificate")
|
||
|
||
if _, err := os.Stat(filepath.Join(m.CAROOT, rootKeyName)); os.IsNotExist(err) {
|
||
return // keyless mode, where only -install works
|
||
}
|
||
|
||
keyPEMBlock, err := ioutil.ReadFile(filepath.Join(m.CAROOT, rootKeyName))
|
||
fatalIfErr(err, "failed to read the CA key")
|
||
keyDERBlock, _ := pem.Decode(keyPEMBlock)
|
||
if keyDERBlock == nil || keyDERBlock.Type != "PRIVATE KEY" {
|
||
log.Fatalln("ERROR: failed to read the CA key: unexpected content")
|
||
}
|
||
m.caKey, err = x509.ParsePKCS8PrivateKey(keyDERBlock.Bytes)
|
||
fatalIfErr(err, "failed to parse the CA key")
|
||
}
|
||
|
||
func (m *mkcert) newCA() {
|
||
priv, err := m.generateKey(true)
|
||
fatalIfErr(err, "failed to generate the CA key")
|
||
pub := priv.(crypto.Signer).Public()
|
||
|
||
serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
|
||
serialNumber, err := rand.Int(rand.Reader, serialNumberLimit)
|
||
fatalIfErr(err, "failed to generate serial number")
|
||
|
||
spkiASN1, err := x509.MarshalPKIXPublicKey(pub)
|
||
fatalIfErr(err, "failed to encode public key")
|
||
|
||
var spki struct {
|
||
Algorithm pkix.AlgorithmIdentifier
|
||
SubjectPublicKey asn1.BitString
|
||
}
|
||
_, err = asn1.Unmarshal(spkiASN1, &spki)
|
||
fatalIfErr(err, "failed to decode public key")
|
||
|
||
skid := sha1.Sum(spki.SubjectPublicKey.Bytes)
|
||
|
||
tpl := &x509.Certificate{
|
||
SerialNumber: serialNumber,
|
||
Subject: pkix.Name{
|
||
Organization: []string{"mkcert development CA"},
|
||
OrganizationalUnit: []string{userAndHostname},
|
||
|
||
// The CommonName is required by iOS to show the certificate in the
|
||
// "Certificate Trust Settings" menu.
|
||
// https://github.com/FiloSottile/mkcert/issues/47
|
||
CommonName: "mkcert " + userAndHostname,
|
||
},
|
||
SubjectKeyId: skid[:],
|
||
|
||
NotAfter: time.Now().AddDate(10, 0, 0),
|
||
NotBefore: time.Now(),
|
||
|
||
KeyUsage: x509.KeyUsageCertSign,
|
||
|
||
BasicConstraintsValid: true,
|
||
IsCA: true,
|
||
MaxPathLenZero: true,
|
||
}
|
||
|
||
cert, err := x509.CreateCertificate(rand.Reader, tpl, tpl, pub, priv)
|
||
fatalIfErr(err, "failed to generate CA certificate")
|
||
|
||
privDER, err := x509.MarshalPKCS8PrivateKey(priv)
|
||
fatalIfErr(err, "failed to encode CA key")
|
||
err = ioutil.WriteFile(filepath.Join(m.CAROOT, rootKeyName), pem.EncodeToMemory(
|
||
&pem.Block{Type: "PRIVATE KEY", Bytes: privDER}), 0400)
|
||
fatalIfErr(err, "failed to save CA key")
|
||
|
||
err = ioutil.WriteFile(filepath.Join(m.CAROOT, rootName), pem.EncodeToMemory(
|
||
&pem.Block{Type: "CERTIFICATE", Bytes: cert}), 0644)
|
||
fatalIfErr(err, "failed to save CA key")
|
||
|
||
log.Printf("Created a new local CA at \"%s\" 💥\n", m.CAROOT)
|
||
}
|
||
|
||
func (m *mkcert) caUniqueName() string {
|
||
return "mkcert development CA " + m.caCert.SerialNumber.String()
|
||
}
|