255 lines
6.9 KiB
Go
255 lines
6.9 KiB
Go
// Copyright 2018 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Command mkcert is a simple zero-config tool to make development certificates.
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package main
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import (
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"crypto"
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"crypto/x509"
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"flag"
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"fmt"
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"log"
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"net"
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"os"
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"path/filepath"
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"regexp"
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"runtime"
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"golang.org/x/net/idna"
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)
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const usage = `Usage of mkcert:
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$ mkcert -install
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Install the local CA in the system trust store.
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$ mkcert example.org
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Generate "example.org.pem" and "example.org-key.pem".
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$ mkcert example.com myapp.dev localhost 127.0.0.1 ::1
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Generate "example.com+4.pem" and "example.com+4-key.pem".
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$ mkcert "*.example.com"
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Generate "_wildcard.example.com.pem" and "_wildcard.example.com-key.pem".
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$ mkcert -pkcs12 example.com
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Generate "example.com.p12" instead of a PEM file.
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$ mkcert -uninstall
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Uninstall the local CA (but do not delete it).
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Change the CA certificate and key storage location by setting $CAROOT,
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print it with "mkcert -CAROOT".
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`
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func main() {
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log.SetFlags(0)
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var installFlag = flag.Bool("install", false, "install the local root CA in the system trust store")
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var uninstallFlag = flag.Bool("uninstall", false, "uninstall the local root CA from the system trust store")
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var pkcs12Flag = flag.Bool("pkcs12", false, "generate PKCS#12 instead of PEM")
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var carootFlag = flag.Bool("CAROOT", false, "print the CAROOT path")
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flag.Usage = func() { fmt.Fprintf(flag.CommandLine.Output(), usage) }
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flag.Parse()
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if *carootFlag {
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if *installFlag || *uninstallFlag {
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log.Fatalln("ERROR: you can't set -[un]install and -CAROOT at the same time")
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}
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fmt.Println(getCAROOT())
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return
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}
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if *installFlag && *uninstallFlag {
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log.Fatalln("ERROR: you can't set -install and -uninstall at the same time")
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}
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(&mkcert{
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installMode: *installFlag, uninstallMode: *uninstallFlag, pkcs12: *pkcs12Flag,
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}).Run(flag.Args())
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}
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const rootName = "rootCA.pem"
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const keyName = "rootCA-key.pem"
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type mkcert struct {
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installMode, uninstallMode bool
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pkcs12 bool
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CAROOT string
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caCert *x509.Certificate
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caKey crypto.PrivateKey
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// The system cert pool is only loaded once. After installing the root, checks
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// will keep failing until the next execution. TODO: maybe execve?
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// https://github.com/golang/go/issues/24540 (thanks, myself)
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ignoreCheckFailure bool
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}
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func (m *mkcert) Run(args []string) {
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m.CAROOT = getCAROOT()
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if m.CAROOT == "" {
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log.Fatalln("ERROR: failed to find the default CA location, set one as the CAROOT env var")
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}
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fatalIfErr(os.MkdirAll(m.CAROOT, 0755), "failed to create the CAROOT")
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m.loadCA()
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if m.installMode {
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m.install()
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if len(args) == 0 {
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return
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}
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} else if m.uninstallMode {
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m.uninstall()
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return
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} else {
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var warning bool
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if !m.checkPlatform() {
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warning = true
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log.Println("Warning: the local CA is not installed in the system trust store! ⚠️")
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}
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if hasNSS && CertutilInstallHelp != "" && !m.checkNSS() {
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warning = true
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log.Printf("Warning: the local CA is not installed in the %s trust store! ⚠️", NSSBrowsers)
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}
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if hasJava && !m.checkJava() {
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warning = true
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log.Println("Warning: the local CA is not installed in the Java trust store! ⚠️")
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}
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if warning {
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log.Println("Run \"mkcert -install\" to avoid verification errors ‼️")
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}
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}
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if len(args) == 0 {
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log.Printf("\n%s", usage)
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return
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}
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hostnameRegexp := regexp.MustCompile(`(?i)^(\*\.)?[0-9a-z_-]([0-9a-z._-]*[0-9a-z_-])?$`)
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for i, name := range args {
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if ip := net.ParseIP(name); ip != nil {
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continue
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}
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punycode, err := idna.ToASCII(name)
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if err != nil {
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log.Fatalf("ERROR: %q is not a valid hostname or IP: %s", name, err)
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}
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args[i] = punycode
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if !hostnameRegexp.MatchString(punycode) {
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log.Fatalf("ERROR: %q is not a valid hostname or IP", name)
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}
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}
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m.makeCert(args)
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}
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func getCAROOT() string {
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if env := os.Getenv("CAROOT"); env != "" {
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return env
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}
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var dir string
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switch {
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case runtime.GOOS == "windows":
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dir = os.Getenv("LocalAppData")
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case os.Getenv("XDG_DATA_HOME") != "":
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dir = os.Getenv("XDG_DATA_HOME")
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case runtime.GOOS == "darwin":
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dir = os.Getenv("HOME")
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if dir == "" {
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return ""
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}
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dir = filepath.Join(dir, "Library", "Application Support")
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default: // Unix
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dir = os.Getenv("HOME")
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if dir == "" {
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return ""
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}
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dir = filepath.Join(dir, ".local", "share")
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}
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return filepath.Join(dir, "mkcert")
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}
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func (m *mkcert) install() {
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var printed bool
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if !m.checkPlatform() {
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if m.installPlatform() {
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log.Print("The local CA is now installed in the system trust store! ⚡️")
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}
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m.ignoreCheckFailure = true // TODO: replace with a check for a successful install
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printed = true
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}
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if hasNSS && !m.checkNSS() {
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if hasCertutil && m.installNSS() {
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log.Printf("The local CA is now installed in the %s trust store (requires browser restart)! 🦊", NSSBrowsers)
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} else if CertutilInstallHelp == "" {
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log.Printf(`Note: %s support is not available on your platform. ℹ️`, NSSBrowsers)
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} else if !hasCertutil {
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log.Printf(`Warning: "certutil" is not available, so the CA can't be automatically installed in %s! ⚠️`, NSSBrowsers)
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log.Printf(`Install "certutil" with "%s" and re-run "mkcert -install" 👈`, CertutilInstallHelp)
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}
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printed = true
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}
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if hasJava && !m.checkJava() {
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if hasKeytool {
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m.installJava()
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log.Println("The local CA is now installed in Java's trust store! ☕️")
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} else {
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log.Println(`Warning: "keytool" is not available, so the CA can't be automatically installed in Java's trust store! ⚠️`)
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}
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printed = true
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}
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if printed {
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log.Print("")
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}
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}
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func (m *mkcert) uninstall() {
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if hasNSS {
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if hasCertutil {
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m.uninstallNSS()
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} else if CertutilInstallHelp != "" {
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log.Print("")
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log.Printf(`Warning: "certutil" is not available, so the CA can't be automatically uninstalled from %s (if it was ever installed)! ⚠️`, NSSBrowsers)
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log.Printf(`You can install "certutil" with "%s" and re-run "mkcert -uninstall" 👈`, CertutilInstallHelp)
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log.Print("")
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}
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}
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if hasJava {
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if hasKeytool {
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m.uninstallJava()
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} else {
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log.Print("")
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log.Println(`Warning: "keytool" is not available, so the CA can't be automatically uninstalled from Java's trust store (if it was ever installed)! ⚠️`)
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log.Print("")
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}
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}
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if m.uninstallPlatform() {
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log.Print("The local CA is now uninstalled from the system trust store(s)! 👋")
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log.Print("")
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} else if hasCertutil {
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log.Printf("The local CA is now uninstalled from the %s trust store(s)! 👋", NSSBrowsers)
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log.Print("")
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}
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}
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func (m *mkcert) checkPlatform() bool {
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if m.ignoreCheckFailure {
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return true
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}
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_, err := m.caCert.Verify(x509.VerifyOptions{})
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return err == nil
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}
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func fatalIfErr(err error, msg string) {
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if err != nil {
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log.Fatalf("ERROR: %s: %s", msg, err)
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}
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}
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func fatalIfCmdErr(err error, cmd string, out []byte) {
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if err != nil {
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log.Fatalf("ERROR: failed to execute \"%s\": %s\n\n%s\n", cmd, err, out)
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}
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}
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