1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
|
// 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 (
"bytes"
"crypto/tls"
"encoding/pem"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
"github.com/caddyserver/caddy/v2"
)
func init() {
caddy.RegisterModule(FolderLoader{})
}
// FolderLoader loads certificates and their associated keys from disk
// by recursively walking the specified directories, looking for PEM
// files which contain both a certificate and a key.
type FolderLoader []string
// CaddyModule returns the Caddy module information.
func (FolderLoader) CaddyModule() caddy.ModuleInfo {
return caddy.ModuleInfo{
ID: "tls.certificates.load_folders",
New: func() caddy.Module { return new(FolderLoader) },
}
}
// LoadCertificates loads all the certificates+keys in the directories
// listed in fl from all files ending with .pem. This method of loading
// certificates expects the certificate and key to be bundled into the
// same file.
func (fl FolderLoader) LoadCertificates() ([]Certificate, error) {
var certs []Certificate
for _, dir := range fl {
err := filepath.Walk(dir, func(fpath string, info os.FileInfo, err error) error {
if err != nil {
return fmt.Errorf("unable to traverse into path: %s", fpath)
}
if info.IsDir() {
return nil
}
if !strings.HasSuffix(strings.ToLower(info.Name()), ".pem") {
return nil
}
cert, err := x509CertFromCertAndKeyPEMFile(fpath)
if err != nil {
return err
}
certs = append(certs, Certificate{Certificate: cert})
return nil
})
if err != nil {
return nil, err
}
}
return certs, nil
}
func x509CertFromCertAndKeyPEMFile(fpath string) (tls.Certificate, error) {
bundle, err := ioutil.ReadFile(fpath)
if err != nil {
return tls.Certificate{}, err
}
certBuilder, keyBuilder := new(bytes.Buffer), new(bytes.Buffer)
var foundKey bool // use only the first key in the file
for {
// Decode next block so we can see what type it is
var derBlock *pem.Block
derBlock, bundle = pem.Decode(bundle)
if derBlock == nil {
break
}
if derBlock.Type == "CERTIFICATE" {
// Re-encode certificate as PEM, appending to certificate chain
pem.Encode(certBuilder, derBlock)
} else if derBlock.Type == "EC PARAMETERS" {
// EC keys generated from openssl can be composed of two blocks:
// parameters and key (parameter block should come first)
if !foundKey {
// Encode parameters
pem.Encode(keyBuilder, derBlock)
// Key must immediately follow
derBlock, bundle = pem.Decode(bundle)
if derBlock == nil || derBlock.Type != "EC PRIVATE KEY" {
return tls.Certificate{}, fmt.Errorf("%s: expected elliptic private key to immediately follow EC parameters", fpath)
}
pem.Encode(keyBuilder, derBlock)
foundKey = true
}
} else if derBlock.Type == "PRIVATE KEY" || strings.HasSuffix(derBlock.Type, " PRIVATE KEY") {
// RSA key
if !foundKey {
pem.Encode(keyBuilder, derBlock)
foundKey = true
}
} else {
return tls.Certificate{}, fmt.Errorf("%s: unrecognized PEM block type: %s", fpath, derBlock.Type)
}
}
certPEMBytes, keyPEMBytes := certBuilder.Bytes(), keyBuilder.Bytes()
if len(certPEMBytes) == 0 {
return tls.Certificate{}, fmt.Errorf("%s: failed to parse PEM data", fpath)
}
if len(keyPEMBytes) == 0 {
return tls.Certificate{}, fmt.Errorf("%s: no private key block found", fpath)
}
cert, err := tls.X509KeyPair(certPEMBytes, keyPEMBytes)
if err != nil {
return tls.Certificate{}, fmt.Errorf("%s: making X509 key pair: %v", fpath, err)
}
return cert, nil
}
var _ CertificateLoader = (FolderLoader)(nil)
|
