mirror of https://github.com/caddyserver/caddy
130 lines
3.6 KiB
Go
130 lines
3.6 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/json"
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"encoding/pem"
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"fmt"
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"github.com/caddyserver/certmagic"
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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(LeafStorageLoader{})
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}
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// LeafStorageLoader loads leaf certificates from the
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// globally configured storage module.
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type LeafStorageLoader struct {
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// A list of certificate file names to be loaded from storage.
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Certificates []string `json:"certificates,omitempty"`
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// The storage module where the trusted leaf certificates are stored. Absent
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// explicit storage implies the use of Caddy default storage.
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StorageRaw json.RawMessage `json:"storage,omitempty" caddy:"namespace=caddy.storage inline_key=module"`
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// Reference to the globally configured storage module.
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storage certmagic.Storage
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ctx caddy.Context
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}
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// CaddyModule returns the Caddy module information.
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func (LeafStorageLoader) CaddyModule() caddy.ModuleInfo {
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return caddy.ModuleInfo{
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ID: "tls.leaf_cert_loader.storage",
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New: func() caddy.Module { return new(LeafStorageLoader) },
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}
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}
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// Provision loads the storage module for sl.
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func (sl *LeafStorageLoader) Provision(ctx caddy.Context) error {
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if sl.StorageRaw != nil {
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val, err := ctx.LoadModule(sl, "StorageRaw")
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if err != nil {
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return fmt.Errorf("loading storage module: %v", err)
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}
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cmStorage, err := val.(caddy.StorageConverter).CertMagicStorage()
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if err != nil {
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return fmt.Errorf("creating storage configuration: %v", err)
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}
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sl.storage = cmStorage
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}
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if sl.storage == nil {
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sl.storage = ctx.Storage()
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}
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sl.ctx = ctx
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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 sl.Certificates {
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sl.Certificates[k] = repl.ReplaceKnown(path, "")
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}
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return nil
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}
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// LoadLeafCertificates returns the certificates to be loaded by sl.
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func (sl LeafStorageLoader) LoadLeafCertificates() ([]*x509.Certificate, error) {
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certificates := make([]*x509.Certificate, 0, len(sl.Certificates))
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for _, path := range sl.Certificates {
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certData, err := sl.storage.Load(sl.ctx, path)
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if err != nil {
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return nil, err
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}
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ders, err := convertPEMToDER(certData)
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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 convertPEMToDER(pemData []byte) ([]byte, error) {
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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(pemData); 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 the given pem data")
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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 the given pem data")
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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 = (*LeafStorageLoader)(nil)
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_ caddy.Provisioner = (*LeafStorageLoader)(nil)
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)
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