mirror of https://github.com/caddyserver/caddy
100 lines
2.7 KiB
Go
100 lines
2.7 KiB
Go
// Copyright 2015 Matthew Holt and The Caddy Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package caddytls
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import (
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"crypto/x509"
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"encoding/pem"
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"fmt"
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"os"
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"github.com/caddyserver/caddy/v2"
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)
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func init() {
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caddy.RegisterModule(LeafFileLoader{})
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}
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// LeafFileLoader loads leaf certificates from disk.
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type LeafFileLoader struct {
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Files []string `json:"files,omitempty"`
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}
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// Provision implements caddy.Provisioner.
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func (fl *LeafFileLoader) Provision(ctx caddy.Context) error {
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repl, ok := ctx.Value(caddy.ReplacerCtxKey).(*caddy.Replacer)
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if !ok {
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repl = caddy.NewReplacer()
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}
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for k, path := range fl.Files {
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fl.Files[k] = repl.ReplaceKnown(path, "")
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}
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return nil
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}
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// CaddyModule returns the Caddy module information.
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func (LeafFileLoader) CaddyModule() caddy.ModuleInfo {
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return caddy.ModuleInfo{
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ID: "tls.leaf_cert_loader.file",
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New: func() caddy.Module { return new(LeafFileLoader) },
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}
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}
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// LoadLeafCertificates returns the certificates to be loaded by fl.
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func (fl LeafFileLoader) LoadLeafCertificates() ([]*x509.Certificate, error) {
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certificates := make([]*x509.Certificate, 0, len(fl.Files))
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for _, path := range fl.Files {
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ders, err := convertPEMFilesToDERBytes(path)
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if err != nil {
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return nil, err
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}
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certs, err := x509.ParseCertificates(ders)
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if err != nil {
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return nil, err
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}
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certificates = append(certificates, certs...)
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}
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return certificates, nil
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}
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func convertPEMFilesToDERBytes(filename string) ([]byte, error) {
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certDataPEM, err := os.ReadFile(filename)
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if err != nil {
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return nil, err
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}
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var ders []byte
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// while block is not nil, we have more certificates in the file
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for block, rest := pem.Decode(certDataPEM); block != nil; block, rest = pem.Decode(rest) {
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if block.Type != "CERTIFICATE" {
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return nil, fmt.Errorf("no CERTIFICATE pem block found in %s", filename)
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}
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ders = append(
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ders,
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block.Bytes...,
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)
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}
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// if we decoded nothing, return an error
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if len(ders) == 0 {
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return nil, fmt.Errorf("no CERTIFICATE pem block found in %s", filename)
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}
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return ders, nil
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}
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// Interface guard
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var (
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_ LeafCertificateLoader = (*LeafFileLoader)(nil)
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_ caddy.Provisioner = (*LeafFileLoader)(nil)
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)
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