mirror of https://github.com/caddyserver/caddy.git
357 lines
11 KiB
Go
357 lines
11 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package caddypki
|
|
|
|
import (
|
|
"crypto/x509"
|
|
"encoding/json"
|
|
"fmt"
|
|
"path"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/caddyserver/caddy/v2"
|
|
"github.com/caddyserver/certmagic"
|
|
"github.com/smallstep/truststore"
|
|
"go.uber.org/zap"
|
|
)
|
|
|
|
// CA describes a certificate authority, which consists of
|
|
// root/signing certificates and various settings pertaining
|
|
// to the issuance of certificates and trusting them.
|
|
type CA struct {
|
|
// The user-facing name of the certificate authority.
|
|
Name string `json:"name,omitempty"`
|
|
|
|
// The name to put in the CommonName field of the
|
|
// root certificate.
|
|
RootCommonName string `json:"root_common_name,omitempty"`
|
|
|
|
// The name to put in the CommonName field of the
|
|
// intermediate certificates.
|
|
IntermediateCommonName string `json:"intermediate_common_name,omitempty"`
|
|
|
|
// Whether Caddy will attempt to install the CA's root
|
|
// into the system trust store, as well as into Java
|
|
// and Mozilla Firefox trust stores. Default: true.
|
|
InstallTrust *bool `json:"install_trust,omitempty"`
|
|
|
|
Root *KeyPair `json:"root,omitempty"`
|
|
Intermediate *KeyPair `json:"intermediate,omitempty"`
|
|
|
|
// Optionally configure a separate storage module associated with this
|
|
// issuer, instead of using Caddy's global/default-configured storage.
|
|
// This can be useful if you want to keep your signing keys in a
|
|
// separate location from your leaf certificates.
|
|
StorageRaw json.RawMessage `json:"storage,omitempty" caddy:"namespace=caddy.storage inline_key=module"`
|
|
|
|
id string
|
|
storage certmagic.Storage
|
|
root, inter *x509.Certificate
|
|
interKey interface{} // TODO: should we just store these as crypto.Signer?
|
|
mu *sync.RWMutex
|
|
|
|
rootCertPath string // mainly used for logging purposes if trusting
|
|
log *zap.Logger
|
|
}
|
|
|
|
// Provision sets up the CA.
|
|
func (ca *CA) Provision(ctx caddy.Context, id string, log *zap.Logger) error {
|
|
ca.mu = new(sync.RWMutex)
|
|
ca.log = log.Named("ca." + id)
|
|
|
|
if id == "" {
|
|
return fmt.Errorf("CA ID is required (use 'local' for the default CA)")
|
|
}
|
|
ca.mu.Lock()
|
|
ca.id = id
|
|
ca.mu.Unlock()
|
|
|
|
if ca.StorageRaw != nil {
|
|
val, err := ctx.LoadModule(ca, "StorageRaw")
|
|
if err != nil {
|
|
return fmt.Errorf("loading storage module: %v", err)
|
|
}
|
|
cmStorage, err := val.(caddy.StorageConverter).CertMagicStorage()
|
|
if err != nil {
|
|
return fmt.Errorf("creating storage configuration: %v", err)
|
|
}
|
|
ca.storage = cmStorage
|
|
}
|
|
if ca.storage == nil {
|
|
ca.storage = ctx.Storage()
|
|
}
|
|
|
|
if ca.Name == "" {
|
|
ca.Name = defaultCAName
|
|
}
|
|
if ca.RootCommonName == "" {
|
|
ca.RootCommonName = defaultRootCommonName
|
|
}
|
|
if ca.IntermediateCommonName == "" {
|
|
ca.IntermediateCommonName = defaultIntermediateCommonName
|
|
}
|
|
|
|
// load the certs and key that will be used for signing
|
|
var rootCert, interCert *x509.Certificate
|
|
var rootKey, interKey interface{}
|
|
var err error
|
|
if ca.Root != nil {
|
|
if ca.Root.Format == "" || ca.Root.Format == "pem_file" {
|
|
ca.rootCertPath = ca.Root.Certificate
|
|
}
|
|
rootCert, rootKey, err = ca.Root.Load()
|
|
} else {
|
|
ca.rootCertPath = "storage:" + ca.storageKeyRootCert()
|
|
rootCert, rootKey, err = ca.loadOrGenRoot()
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if ca.Intermediate != nil {
|
|
interCert, interKey, err = ca.Intermediate.Load()
|
|
} else {
|
|
interCert, interKey, err = ca.loadOrGenIntermediate(rootCert, rootKey)
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
ca.mu.Lock()
|
|
ca.root, ca.inter, ca.interKey = rootCert, interCert, interKey
|
|
ca.mu.Unlock()
|
|
|
|
return nil
|
|
}
|
|
|
|
// ID returns the CA's ID, as given by the user in the config.
|
|
func (ca CA) ID() string {
|
|
return ca.id
|
|
}
|
|
|
|
// RootCertificate returns the CA's root certificate (public key).
|
|
func (ca CA) RootCertificate() *x509.Certificate {
|
|
ca.mu.RLock()
|
|
defer ca.mu.RUnlock()
|
|
return ca.root
|
|
}
|
|
|
|
// RootKey returns the CA's root private key. Since the root key is
|
|
// not cached in memory long-term, it needs to be loaded from storage,
|
|
// which could yield an error.
|
|
func (ca CA) RootKey() (interface{}, error) {
|
|
_, rootKey, err := ca.loadOrGenRoot()
|
|
return rootKey, err
|
|
}
|
|
|
|
// IntermediateCertificate returns the CA's intermediate
|
|
// certificate (public key).
|
|
func (ca CA) IntermediateCertificate() *x509.Certificate {
|
|
ca.mu.RLock()
|
|
defer ca.mu.RUnlock()
|
|
return ca.inter
|
|
}
|
|
|
|
// IntermediateKey returns the CA's intermediate private key.
|
|
func (ca CA) IntermediateKey() interface{} {
|
|
ca.mu.RLock()
|
|
defer ca.mu.RUnlock()
|
|
return ca.interKey
|
|
}
|
|
|
|
func (ca CA) loadOrGenRoot() (rootCert *x509.Certificate, rootKey interface{}, err error) {
|
|
rootCertPEM, err := ca.storage.Load(ca.storageKeyRootCert())
|
|
if err != nil {
|
|
if _, ok := err.(certmagic.ErrNotExist); !ok {
|
|
return nil, nil, fmt.Errorf("loading root cert: %v", err)
|
|
}
|
|
|
|
// TODO: should we require that all or none of the assets are required before overwriting anything?
|
|
rootCert, rootKey, err = ca.genRoot()
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("generating root: %v", err)
|
|
}
|
|
}
|
|
|
|
if rootCert == nil {
|
|
rootCert, err = pemDecodeSingleCert(rootCertPEM)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("parsing root certificate PEM: %v", err)
|
|
}
|
|
}
|
|
if rootKey == nil {
|
|
rootKeyPEM, err := ca.storage.Load(ca.storageKeyRootKey())
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("loading root key: %v", err)
|
|
}
|
|
rootKey, err = pemDecodePrivateKey(rootKeyPEM)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("decoding root key: %v", err)
|
|
}
|
|
}
|
|
|
|
return rootCert, rootKey, nil
|
|
}
|
|
|
|
func (ca CA) genRoot() (rootCert *x509.Certificate, rootKey interface{}, err error) {
|
|
repl := ca.newReplacer()
|
|
|
|
rootCert, rootKey, err = generateRoot(repl.ReplaceAll(ca.RootCommonName, ""))
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("generating CA root: %v", err)
|
|
}
|
|
rootCertPEM, err := pemEncodeCert(rootCert.Raw)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("encoding root certificate: %v", err)
|
|
}
|
|
err = ca.storage.Store(ca.storageKeyRootCert(), rootCertPEM)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("saving root certificate: %v", err)
|
|
}
|
|
rootKeyPEM, err := pemEncodePrivateKey(rootKey)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("encoding root key: %v", err)
|
|
}
|
|
err = ca.storage.Store(ca.storageKeyRootKey(), rootKeyPEM)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("saving root key: %v", err)
|
|
}
|
|
|
|
return rootCert, rootKey, nil
|
|
}
|
|
|
|
func (ca CA) loadOrGenIntermediate(rootCert *x509.Certificate, rootKey interface{}) (interCert *x509.Certificate, interKey interface{}, err error) {
|
|
interCertPEM, err := ca.storage.Load(ca.storageKeyIntermediateCert())
|
|
if err != nil {
|
|
if _, ok := err.(certmagic.ErrNotExist); !ok {
|
|
return nil, nil, fmt.Errorf("loading intermediate cert: %v", err)
|
|
}
|
|
|
|
// TODO: should we require that all or none of the assets are required before overwriting anything?
|
|
interCert, interKey, err = ca.genIntermediate(rootCert, rootKey)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("generating new intermediate cert: %v", err)
|
|
}
|
|
}
|
|
|
|
if interCert == nil {
|
|
interCert, err = pemDecodeSingleCert(interCertPEM)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("decoding intermediate certificate PEM: %v", err)
|
|
}
|
|
}
|
|
|
|
if interKey == nil {
|
|
interKeyPEM, err := ca.storage.Load(ca.storageKeyIntermediateKey())
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("loading intermediate key: %v", err)
|
|
}
|
|
interKey, err = pemDecodePrivateKey(interKeyPEM)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("decoding intermediate key: %v", err)
|
|
}
|
|
}
|
|
|
|
return interCert, interKey, nil
|
|
}
|
|
|
|
func (ca CA) genIntermediate(rootCert *x509.Certificate, rootKey interface{}) (interCert *x509.Certificate, interKey interface{}, err error) {
|
|
repl := ca.newReplacer()
|
|
|
|
rootKeyPEM, err := ca.storage.Load(ca.storageKeyRootKey())
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("loading root key to sign new intermediate: %v", err)
|
|
}
|
|
rootKey, err = pemDecodePrivateKey(rootKeyPEM)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("decoding root key: %v", err)
|
|
}
|
|
interCert, interKey, err = generateIntermediate(repl.ReplaceAll(ca.IntermediateCommonName, ""), rootCert, rootKey)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("generating CA intermediate: %v", err)
|
|
}
|
|
interCertPEM, err := pemEncodeCert(interCert.Raw)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("encoding intermediate certificate: %v", err)
|
|
}
|
|
err = ca.storage.Store(ca.storageKeyIntermediateCert(), interCertPEM)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("saving intermediate certificate: %v", err)
|
|
}
|
|
interKeyPEM, err := pemEncodePrivateKey(interKey)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("encoding intermediate key: %v", err)
|
|
}
|
|
err = ca.storage.Store(ca.storageKeyIntermediateKey(), interKeyPEM)
|
|
if err != nil {
|
|
return nil, nil, fmt.Errorf("saving intermediate key: %v", err)
|
|
}
|
|
|
|
return interCert, interKey, nil
|
|
}
|
|
|
|
func (ca CA) storageKeyCAPrefix() string {
|
|
return path.Join("pki", "authorities", certmagic.StorageKeys.Safe(ca.id))
|
|
}
|
|
func (ca CA) storageKeyRootCert() string {
|
|
return path.Join(ca.storageKeyCAPrefix(), "root.crt")
|
|
}
|
|
func (ca CA) storageKeyRootKey() string {
|
|
return path.Join(ca.storageKeyCAPrefix(), "root.key")
|
|
}
|
|
func (ca CA) storageKeyIntermediateCert() string {
|
|
return path.Join(ca.storageKeyCAPrefix(), "intermediate.crt")
|
|
}
|
|
func (ca CA) storageKeyIntermediateKey() string {
|
|
return path.Join(ca.storageKeyCAPrefix(), "intermediate.key")
|
|
}
|
|
|
|
func (ca CA) newReplacer() *caddy.Replacer {
|
|
repl := caddy.NewReplacer()
|
|
repl.Set("pki.ca.name", ca.Name)
|
|
return repl
|
|
}
|
|
|
|
// installRoot installs this CA's root certificate into the
|
|
// local trust store(s) if it is not already trusted. The CA
|
|
// must already be provisioned.
|
|
func (ca CA) installRoot() error {
|
|
// avoid password prompt if already trusted
|
|
if trusted(ca.root) {
|
|
ca.log.Info("root certificate is already trusted by system",
|
|
zap.String("path", ca.rootCertPath))
|
|
return nil
|
|
}
|
|
|
|
ca.log.Warn("installing root certificate (you might be prompted for password)",
|
|
zap.String("path", ca.rootCertPath))
|
|
|
|
return truststore.Install(ca.root,
|
|
truststore.WithDebug(),
|
|
truststore.WithFirefox(),
|
|
truststore.WithJava(),
|
|
)
|
|
}
|
|
|
|
const (
|
|
defaultCAID = "local"
|
|
defaultCAName = "Caddy Local Authority"
|
|
defaultRootCommonName = "{pki.ca.name} - {time.now.year} ECC Root"
|
|
defaultIntermediateCommonName = "{pki.ca.name} - ECC Intermediate"
|
|
|
|
defaultRootLifetime = 24 * time.Hour * 30 * 12 * 10
|
|
defaultIntermediateLifetime = 24 * time.Hour * 7
|
|
)
|