mirror of
https://github.com/smallstep/certificates.git
synced 2024-11-13 07:10:28 +00:00
467 lines
13 KiB
Go
467 lines
13 KiB
Go
package main
|
|
|
|
import (
|
|
"context"
|
|
"crypto"
|
|
"crypto/ecdsa"
|
|
"crypto/elliptic"
|
|
"crypto/rand"
|
|
"crypto/sha1"
|
|
"crypto/x509"
|
|
"crypto/x509/pkix"
|
|
"encoding/pem"
|
|
"flag"
|
|
"fmt"
|
|
"math/big"
|
|
"os"
|
|
"runtime"
|
|
"time"
|
|
|
|
"github.com/pkg/errors"
|
|
"github.com/smallstep/certificates/kms"
|
|
"github.com/smallstep/certificates/kms/apiv1"
|
|
"github.com/smallstep/certificates/kms/uri"
|
|
"go.step.sm/cli-utils/fileutil"
|
|
"go.step.sm/cli-utils/ui"
|
|
"go.step.sm/crypto/pemutil"
|
|
|
|
// Enable pkcs11.
|
|
_ "github.com/smallstep/certificates/kms/pkcs11"
|
|
)
|
|
|
|
// Config is a mapping of the cli flags.
|
|
type Config struct {
|
|
KMS string
|
|
RootOnly bool
|
|
RootObject string
|
|
RootKeyObject string
|
|
RootSubject string
|
|
RootPath string
|
|
CrtObject string
|
|
CrtPath string
|
|
CrtKeyObject string
|
|
CrtSubject string
|
|
CrtKeyPath string
|
|
SSHHostKeyObject string
|
|
SSHUserKeyObject string
|
|
RootFile string
|
|
KeyFile string
|
|
Pin string
|
|
NoCerts bool
|
|
EnableSSH bool
|
|
Force bool
|
|
}
|
|
|
|
// Validate checks the flags in the config.
|
|
func (c *Config) Validate() error {
|
|
switch {
|
|
case c.KMS == "":
|
|
return errors.New("flag `--kms` is required")
|
|
case c.RootFile != "" && c.KeyFile == "":
|
|
return errors.New("flag `--root` requires flag `--key`")
|
|
case c.KeyFile != "" && c.RootFile == "":
|
|
return errors.New("flag `--key` requires flag `--root`")
|
|
case c.RootOnly && c.RootFile != "":
|
|
return errors.New("flag `--root-only` is incompatible with flag `--root`")
|
|
case c.RootFile == "" && c.RootObject == "":
|
|
return errors.New("one of flag `--root` or `--root-cert` is required")
|
|
case c.RootFile == "" && c.RootKeyObject == "":
|
|
return errors.New("one of flag `--root` or `--root-key` is required")
|
|
default:
|
|
if c.RootFile != "" {
|
|
c.RootObject = ""
|
|
c.RootKeyObject = ""
|
|
}
|
|
if c.RootOnly {
|
|
c.CrtObject = ""
|
|
c.CrtKeyObject = ""
|
|
}
|
|
if !c.EnableSSH {
|
|
c.SSHHostKeyObject = ""
|
|
c.SSHUserKeyObject = ""
|
|
}
|
|
return nil
|
|
}
|
|
}
|
|
|
|
func main() {
|
|
var kmsuri string
|
|
switch runtime.GOOS {
|
|
case "darwin":
|
|
kmsuri = "pkcs11:module-path=/usr/local/lib/pkcs11/yubihsm_pkcs11.dylib;token=YubiHSM"
|
|
case "linux":
|
|
kmsuri = "pkcs11:module-path=/usr/lib/x86_64-linux-gnu/pkcs11/yubihsm_pkcs11.so;token=YubiHSM"
|
|
case "windows":
|
|
if home, err := os.UserHomeDir(); err == nil {
|
|
kmsuri = "pkcs11:module-path=" + home + "\\yubihsm2-sdk\\bin\\yubihsm_pkcs11.dll" + ";token=YubiHSM"
|
|
}
|
|
}
|
|
|
|
var c Config
|
|
flag.StringVar(&c.KMS, "kms", kmsuri, "PKCS #11 URI with the module-path and token to connect to the module.")
|
|
flag.StringVar(&c.Pin, "pin", "", "PKCS #11 PIN")
|
|
flag.StringVar(&c.RootObject, "root-cert", "pkcs11:id=7330;object=root-cert", "PKCS #11 URI with object id and label to store the root certificate.")
|
|
flag.StringVar(&c.RootPath, "root-cert-path", "root_ca.crt", "Location to write the root certificate.")
|
|
flag.StringVar(&c.RootKeyObject, "root-key", "pkcs11:id=7330;object=root-key", "PKCS #11 URI with object id and label to store the root key.")
|
|
flag.StringVar(&c.RootSubject, "root-name", "PKCS #11 Smallstep Root", "Subject and Issuer of the root certificate.")
|
|
flag.StringVar(&c.CrtObject, "crt-cert", "pkcs11:id=7331;object=intermediate-cert", "PKCS #11 URI with object id and label to store the intermediate certificate.")
|
|
flag.StringVar(&c.CrtPath, "crt-cert-path", "intermediate_ca.crt", "Location to write the intermediate certificate.")
|
|
flag.StringVar(&c.CrtKeyObject, "crt-key", "pkcs11:id=7331;object=intermediate-key", "PKCS #11 URI with object id and label to store the intermediate certificate.")
|
|
flag.StringVar(&c.CrtSubject, "crt-name", "PKCS #11 Smallstep Intermediate", "Subject of the intermediate certificate.")
|
|
flag.StringVar(&c.CrtKeyPath, "crt-key-path", "intermediate_ca_key", "Location to write the intermediate private key.")
|
|
flag.StringVar(&c.SSHHostKeyObject, "ssh-host-key", "pkcs11:id=7332;object=ssh-host-key", "PKCS #11 URI with object id and label to store the key used to sign SSH host certificates.")
|
|
flag.StringVar(&c.SSHUserKeyObject, "ssh-user-key", "pkcs11:id=7333;object=ssh-user-key", "PKCS #11 URI with object id and label to store the key used to sign SSH user certificates.")
|
|
flag.BoolVar(&c.RootOnly, "root-only", false, "Store only only the root certificate and sign and intermediate.")
|
|
flag.StringVar(&c.RootFile, "root", "", "Path to the root certificate to use.")
|
|
flag.StringVar(&c.KeyFile, "key", "", "Path to the root key to use.")
|
|
flag.BoolVar(&c.EnableSSH, "ssh", false, "Enable the creation of ssh keys.")
|
|
flag.BoolVar(&c.NoCerts, "no-certs", false, "Do not store certificates in the module.")
|
|
flag.BoolVar(&c.Force, "force", false, "Force the delete of previous keys.")
|
|
flag.Usage = usage
|
|
flag.Parse()
|
|
|
|
if err := c.Validate(); err != nil {
|
|
fatal(err)
|
|
}
|
|
|
|
u, err := uri.ParseWithScheme("pkcs11", c.KMS)
|
|
if err != nil {
|
|
fatal(err)
|
|
}
|
|
|
|
if u.Get("pin-value") == "" && u.Get("pin-source") == "" && c.Pin == "" {
|
|
pin, err := ui.PromptPassword("What is the PKCS#11 PIN?")
|
|
if err != nil {
|
|
fatal(err)
|
|
}
|
|
c.Pin = string(pin)
|
|
}
|
|
|
|
k, err := kms.New(context.Background(), apiv1.Options{
|
|
Type: string(apiv1.PKCS11),
|
|
URI: c.KMS,
|
|
Pin: c.Pin,
|
|
})
|
|
if err != nil {
|
|
fatal(err)
|
|
}
|
|
|
|
defer func() {
|
|
_ = k.Close()
|
|
}()
|
|
|
|
// Check if the slots are empty, fail if they are not
|
|
certUris := []string{
|
|
c.RootObject, c.CrtObject,
|
|
}
|
|
keyUris := []string{
|
|
c.RootKeyObject, c.CrtKeyObject,
|
|
c.SSHHostKeyObject, c.SSHUserKeyObject,
|
|
}
|
|
if !c.Force {
|
|
for _, u := range certUris {
|
|
if u != "" && !c.NoCerts {
|
|
checkObject(k, u)
|
|
checkCertificate(k, u)
|
|
}
|
|
}
|
|
for _, u := range keyUris {
|
|
if u != "" {
|
|
checkObject(k, u)
|
|
}
|
|
}
|
|
} else {
|
|
deleter, ok := k.(interface {
|
|
DeleteKey(uri string) error
|
|
DeleteCertificate(uri string) error
|
|
})
|
|
if ok {
|
|
for _, u := range certUris {
|
|
if u != "" && !c.NoCerts {
|
|
// Some HSMs like Nitrokey will overwrite the key with the
|
|
// certificate label.
|
|
if err := deleter.DeleteKey(u); err != nil {
|
|
fatalClose(err, k)
|
|
}
|
|
if err := deleter.DeleteCertificate(u); err != nil {
|
|
fatalClose(err, k)
|
|
}
|
|
}
|
|
}
|
|
for _, u := range keyUris {
|
|
if u != "" {
|
|
if err := deleter.DeleteKey(u); err != nil {
|
|
fatalClose(err, k)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if err := createPKI(k, c); err != nil {
|
|
fatalClose(err, k)
|
|
}
|
|
}
|
|
|
|
func fatal(err error) {
|
|
if os.Getenv("STEPDEBUG") == "1" {
|
|
fmt.Fprintf(os.Stderr, "%+v\n", err)
|
|
} else {
|
|
fmt.Fprintln(os.Stderr, err)
|
|
}
|
|
os.Exit(1)
|
|
}
|
|
|
|
func fatalClose(err error, k kms.KeyManager) {
|
|
_ = k.Close()
|
|
fatal(err)
|
|
}
|
|
|
|
func usage() {
|
|
fmt.Fprintln(os.Stderr, "Usage: step-pkcs11-init")
|
|
fmt.Fprintln(os.Stderr, `
|
|
The step-pkcs11-init command initializes a public key infrastructure (PKI)
|
|
to be used by step-ca.
|
|
|
|
This tool is experimental and in the future it will be integrated in step cli.
|
|
|
|
OPTIONS`)
|
|
fmt.Fprintln(os.Stderr)
|
|
flag.PrintDefaults()
|
|
fmt.Fprintln(os.Stderr, `
|
|
COPYRIGHT
|
|
|
|
(c) 2018-2021 Smallstep Labs, Inc.`)
|
|
os.Exit(1)
|
|
}
|
|
|
|
func checkCertificate(k kms.KeyManager, rawuri string) {
|
|
if cm, ok := k.(kms.CertificateManager); ok {
|
|
if _, err := cm.LoadCertificate(&apiv1.LoadCertificateRequest{
|
|
Name: rawuri,
|
|
}); err == nil {
|
|
fmt.Fprintf(os.Stderr, "⚠️ Your PKCS #11 module already has a certificate on %s.\n", rawuri)
|
|
fmt.Fprintln(os.Stderr, " If you want to delete it and start fresh, use `--force`.")
|
|
_ = k.Close()
|
|
os.Exit(1)
|
|
}
|
|
}
|
|
}
|
|
|
|
func checkObject(k kms.KeyManager, rawuri string) {
|
|
if _, err := k.GetPublicKey(&apiv1.GetPublicKeyRequest{
|
|
Name: rawuri,
|
|
}); err == nil {
|
|
fmt.Fprintf(os.Stderr, "⚠️ Your PKCS #11 module already has a key on %s.\n", rawuri)
|
|
fmt.Fprintln(os.Stderr, " If you want to delete it and start fresh, use `--force`.")
|
|
_ = k.Close()
|
|
os.Exit(1)
|
|
}
|
|
}
|
|
|
|
func createPKI(k kms.KeyManager, c Config) error {
|
|
var err error
|
|
ui.Println("Creating PKI ...")
|
|
now := time.Now()
|
|
|
|
// Root Certificate
|
|
var signer crypto.Signer
|
|
var root *x509.Certificate
|
|
if c.RootFile != "" && c.KeyFile != "" {
|
|
root, err = pemutil.ReadCertificate(c.RootFile)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
key, err := pemutil.Read(c.KeyFile)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
var ok bool
|
|
if signer, ok = key.(crypto.Signer); !ok {
|
|
return errors.Errorf("key type '%T' does not implement a signer", key)
|
|
}
|
|
} else {
|
|
resp, err := k.CreateKey(&apiv1.CreateKeyRequest{
|
|
Name: c.RootKeyObject,
|
|
SignatureAlgorithm: apiv1.ECDSAWithSHA256,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
signer, err = k.CreateSigner(&resp.CreateSignerRequest)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
template := &x509.Certificate{
|
|
IsCA: true,
|
|
NotBefore: now,
|
|
NotAfter: now.Add(time.Hour * 24 * 365 * 10),
|
|
KeyUsage: x509.KeyUsageCertSign | x509.KeyUsageCRLSign,
|
|
BasicConstraintsValid: true,
|
|
MaxPathLen: 1,
|
|
MaxPathLenZero: false,
|
|
Issuer: pkix.Name{CommonName: c.RootSubject},
|
|
Subject: pkix.Name{CommonName: c.RootSubject},
|
|
SerialNumber: mustSerialNumber(),
|
|
SubjectKeyId: mustSubjectKeyID(resp.PublicKey),
|
|
AuthorityKeyId: mustSubjectKeyID(resp.PublicKey),
|
|
}
|
|
|
|
b, err := x509.CreateCertificate(rand.Reader, template, template, resp.PublicKey, signer)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
root, err = x509.ParseCertificate(b)
|
|
if err != nil {
|
|
return errors.Wrap(err, "error parsing root certificate")
|
|
}
|
|
|
|
if cm, ok := k.(kms.CertificateManager); ok && !c.NoCerts {
|
|
if err = cm.StoreCertificate(&apiv1.StoreCertificateRequest{
|
|
Name: c.RootObject,
|
|
Certificate: root,
|
|
}); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if err = fileutil.WriteFile(c.RootPath, pem.EncodeToMemory(&pem.Block{
|
|
Type: "CERTIFICATE",
|
|
Bytes: b,
|
|
}), 0600); err != nil {
|
|
return err
|
|
}
|
|
|
|
ui.PrintSelected("Root Key", resp.Name)
|
|
ui.PrintSelected("Root Certificate", c.RootPath)
|
|
}
|
|
|
|
// Intermediate Certificate
|
|
var keyName string
|
|
var publicKey crypto.PublicKey
|
|
if c.RootOnly {
|
|
priv, err := ecdsa.GenerateKey(elliptic.P256(), rand.Reader)
|
|
if err != nil {
|
|
return errors.Wrap(err, "error creating intermediate key")
|
|
}
|
|
|
|
pass, err := ui.PromptPasswordGenerate("What do you want your password to be? [leave empty and we'll generate one]",
|
|
ui.WithRichPrompt())
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
_, err = pemutil.Serialize(priv, pemutil.WithPassword(pass), pemutil.ToFile(c.CrtKeyPath, 0600))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
publicKey = priv.Public()
|
|
} else {
|
|
resp, err := k.CreateKey(&apiv1.CreateKeyRequest{
|
|
Name: c.CrtKeyObject,
|
|
SignatureAlgorithm: apiv1.ECDSAWithSHA256,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
publicKey = resp.PublicKey
|
|
keyName = resp.Name
|
|
}
|
|
|
|
template := &x509.Certificate{
|
|
IsCA: true,
|
|
NotBefore: now,
|
|
NotAfter: now.Add(time.Hour * 24 * 365 * 10),
|
|
KeyUsage: x509.KeyUsageCertSign | x509.KeyUsageCRLSign,
|
|
BasicConstraintsValid: true,
|
|
MaxPathLen: 0,
|
|
MaxPathLenZero: true,
|
|
Issuer: root.Subject,
|
|
Subject: pkix.Name{CommonName: c.CrtSubject},
|
|
SerialNumber: mustSerialNumber(),
|
|
SubjectKeyId: mustSubjectKeyID(publicKey),
|
|
}
|
|
|
|
b, err := x509.CreateCertificate(rand.Reader, template, root, publicKey, signer)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
intermediate, err := x509.ParseCertificate(b)
|
|
if err != nil {
|
|
return errors.Wrap(err, "error parsing intermediate certificate")
|
|
}
|
|
|
|
if cm, ok := k.(kms.CertificateManager); ok && !c.NoCerts {
|
|
if err = cm.StoreCertificate(&apiv1.StoreCertificateRequest{
|
|
Name: c.CrtObject,
|
|
Certificate: intermediate,
|
|
}); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
|
|
if err = fileutil.WriteFile(c.CrtPath, pem.EncodeToMemory(&pem.Block{
|
|
Type: "CERTIFICATE",
|
|
Bytes: b,
|
|
}), 0600); err != nil {
|
|
return err
|
|
}
|
|
|
|
if c.RootOnly {
|
|
ui.PrintSelected("Intermediate Key", c.CrtKeyPath)
|
|
} else {
|
|
ui.PrintSelected("Intermediate Key", keyName)
|
|
}
|
|
|
|
ui.PrintSelected("Intermediate Certificate", c.CrtPath)
|
|
|
|
if c.SSHHostKeyObject != "" {
|
|
resp, err := k.CreateKey(&apiv1.CreateKeyRequest{
|
|
Name: c.SSHHostKeyObject,
|
|
SignatureAlgorithm: apiv1.ECDSAWithSHA256,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
ui.PrintSelected("SSH Host Key", resp.Name)
|
|
}
|
|
|
|
if c.SSHUserKeyObject != "" {
|
|
resp, err := k.CreateKey(&apiv1.CreateKeyRequest{
|
|
Name: c.SSHUserKeyObject,
|
|
SignatureAlgorithm: apiv1.ECDSAWithSHA256,
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
ui.PrintSelected("SSH User Key", resp.Name)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func mustSerialNumber() *big.Int {
|
|
serialNumberLimit := new(big.Int).Lsh(big.NewInt(1), 128)
|
|
sn, err := rand.Int(rand.Reader, serialNumberLimit)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
return sn
|
|
}
|
|
|
|
func mustSubjectKeyID(key crypto.PublicKey) []byte {
|
|
b, err := x509.MarshalPKIXPublicKey(key)
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
hash := sha1.Sum(b)
|
|
return hash[:]
|
|
}
|