aboutsummaryrefslogtreecommitdiff
path: root/cmd/acme/file.go
blob: 637ddee4a86a1b1e3c9e4857773e388ed4904a2b (plain)
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
package main

import (
	"crypto"
	"crypto/tls"
	"crypto/x509"
	"io"
	"os"
	"path"

	"github.com/dim13/acme"
)

func NewFile(fname string, mode os.FileMode) (io.WriteCloser, error) {
	_ = os.Rename(fname, fname+".bak")
	flags := os.O_WRONLY | os.O_CREATE | os.O_TRUNC
	return os.OpenFile(fname, flags, mode)
}

func saveKey(fname string, key crypto.PrivateKey) error {
	if err := os.MkdirAll(path.Dir(fname), 0700); err != nil {
		return err
	}
	fd, err := NewFile(fname, 0600)
	if err != nil {
		return err
	}
	defer fd.Close()
	return acme.SaveKey(fd, key)
}

func saveCrt(fname string, certs [][]byte) error {
	if err := os.MkdirAll(path.Dir(fname), 0755); err != nil {
		return err
	}
	fd, err := NewFile(fname, 0644)
	if err != nil {
		return err
	}
	defer fd.Close()
	for _, crt := range certs {
		if err := acme.SaveCert(fd, crt); err != nil {
			return err
		}
	}
	return nil
}

func (d domain) Save(cert tls.Certificate) error {
	if err := saveKey(d.KeyFile, cert.PrivateKey); err != nil {
		return err
	}
	if err := saveCrt(d.CrtFile, cert.Certificate); err != nil {
		return err
	}
	return nil
}

func (d domain) Load() (tls.Certificate, error) {
	crt, err := tls.LoadX509KeyPair(d.CrtFile, d.KeyFile)
	if err != nil {
		return tls.Certificate{}, err
	}
	crt.Leaf, err = x509.ParseCertificate(crt.Certificate[0])
	return crt, err
}

func (d desire) Save(key crypto.PrivateKey) error {
	if err := os.MkdirAll(path.Dir(d.KeyFile), 0700); err != nil {
		return err
	}
	fd, err := NewFile(d.KeyFile, 0600)
	if err != nil {
		return err
	}
	defer fd.Close()
	return acme.SaveKey(fd, key)
}

func (d desire) Load() (crypto.PrivateKey, error) {
	fd, err := os.Open(d.KeyFile)
	if err != nil {
		return nil, err
	}
	defer fd.Close()
	return acme.LoadKey(fd)
}