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// 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 caddytls
import (
"crypto/tls"
"fmt"
"github.com/caddyserver/caddy/v2"
"github.com/caddyserver/certmagic"
)
func init() {
caddy.RegisterModule(StorageLoader{})
}
// StorageLoader loads certificates and their associated keys
// from the globally configured storage module.
type StorageLoader struct {
// A list of pairs of certificate and key file names along with their
// encoding format so that they can be loaded from storage.
Pairs []CertKeyFilePair `json:"pairs,omitempty"`
// Reference to the globally configured storage module.
storage certmagic.Storage
}
// CaddyModule returns the Caddy module information.
func (StorageLoader) CaddyModule() caddy.ModuleInfo {
return caddy.ModuleInfo{
ID: "tls.certificates.load_storage",
New: func() caddy.Module { return new(StorageLoader) },
}
}
// Provision loads the storage module for sl.
func (sl *StorageLoader) Provision(ctx caddy.Context) error {
sl.storage = ctx.Storage()
return nil
}
// LoadCertificates returns the certificates to be loaded by sl.
func (sl StorageLoader) LoadCertificates() ([]Certificate, error) {
certs := make([]Certificate, 0, len(sl.Pairs))
for _, pair := range sl.Pairs {
certData, err := sl.storage.Load(pair.Certificate)
if err != nil {
return nil, err
}
keyData, err := sl.storage.Load(pair.Key)
if err != nil {
return nil, err
}
var cert tls.Certificate
switch pair.Format {
case "":
fallthrough
case "pem":
cert, err = tls.X509KeyPair(certData, keyData)
default:
return nil, fmt.Errorf("unrecognized certificate/key encoding format: %s", pair.Format)
}
if err != nil {
return nil, err
}
certs = append(certs, Certificate{Certificate: cert, Tags: pair.Tags})
}
return certs, nil
}
// Interface guard
var (
_ CertificateLoader = (*StorageLoader)(nil)
_ caddy.Provisioner = (*StorageLoader)(nil)
)
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