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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"
)
func init() {
caddy.RegisterModule(PEMLoader{})
}
// PEMLoader loads certificates and their associated keys by
// decoding their PEM blocks directly. This has the advantage
// of not needing to store them on disk at all.
type PEMLoader []CertKeyPEMPair
// Provision implements caddy.Provisioner.
func (pl PEMLoader) Provision(ctx caddy.Context) error {
repl, ok := ctx.Value(caddy.ReplacerCtxKey).(*caddy.Replacer)
if !ok {
repl = caddy.NewReplacer()
}
for k, pair := range pl {
for i, tag := range pair.Tags {
pair.Tags[i] = repl.ReplaceKnown(tag, "")
}
pl[k] = CertKeyPEMPair{
CertificatePEM: repl.ReplaceKnown(pair.CertificatePEM, ""),
KeyPEM: repl.ReplaceKnown(pair.KeyPEM, ""),
Tags: pair.Tags,
}
}
return nil
}
// CaddyModule returns the Caddy module information.
func (PEMLoader) CaddyModule() caddy.ModuleInfo {
return caddy.ModuleInfo{
ID: "tls.certificates.load_pem",
New: func() caddy.Module { return new(PEMLoader) },
}
}
// CertKeyPEMPair pairs certificate and key PEM blocks.
type CertKeyPEMPair struct {
// The certificate (public key) in PEM format.
CertificatePEM string `json:"certificate"`
// The private key in PEM format.
KeyPEM string `json:"key"`
// Arbitrary values to associate with this certificate.
// Can be useful when you want to select a particular
// certificate when there may be multiple valid candidates.
Tags []string `json:"tags,omitempty"`
}
// LoadCertificates returns the certificates contained in pl.
func (pl PEMLoader) LoadCertificates() ([]Certificate, error) {
certs := make([]Certificate, 0, len(pl))
for i, pair := range pl {
cert, err := tls.X509KeyPair([]byte(pair.CertificatePEM), []byte(pair.KeyPEM))
if err != nil {
return nil, fmt.Errorf("PEM pair %d: %v", i, err)
}
certs = append(certs, Certificate{
Certificate: cert,
Tags: pair.Tags,
})
}
return certs, nil
}
// Interface guard
var (
_ CertificateLoader = (PEMLoader)(nil)
_ caddy.Provisioner = (PEMLoader)(nil)
)
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