aboutsummaryrefslogtreecommitdiff
path: root/cmd/acme/config.go
blob: 39259fd22c7e4ef59cacee80f5431eed647fd6d3 (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
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
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
package main

import (
	"errors"
	"io/ioutil"
	"os/user"
	"path"
	"strings"
	"time"

	"dim13.org/acme"
	"gopkg.in/yaml.v2"
)

const (
	defKeySize = 2048
	day        = time.Hour * 24
	week       = day * 7
	defGrace   = week
	keyPath    = "private"
	crtPath    = "certs"
)

type Config struct {
	Gracetime time.Duration
	Listen    string
	ListenTLS string
	BaseDir   string
	KeySize   int
	Provider  []provider
	Hook      map[string]string
}

type provider struct {
	Directory string
	Account   []account
}

type account struct {
	Mail    string
	Phone   string
	KeySize int
	KeyFile string
	Domain  []domain
}

type domain struct {
	Altnames []string
	KeySize  int
	KeyFile  string
	CrtFile  string
	Webroot  string
	Hook     []string
}

var (
	errNoKey      = errors.New("no key file specified")
	errNoAltNames = errors.New("no altnames specified")
	errNoMail     = errors.New("no mail specified")
)

func expandHome(p string) (string, error) {
	if strings.HasPrefix(p, "~") {
		usr, err := user.Current()
		if err != nil {
			return p, err
		}
		return path.Join(usr.HomeDir, p[1:]), nil
	}
	return p, nil
}

func LoadConfig(fname string) (*Config, error) {
	conf, err := ioutil.ReadFile(fname)
	if err != nil {
		return nil, err
	}
	c := new(Config)
	err = yaml.Unmarshal(conf, c)
	if err != nil {
		return nil, err
	}
	c.BaseDir, err = expandHome(c.BaseDir)
	if err != nil {
		return nil, err
	}
	// apply defaults
	if c.Gracetime == 0 {
		c.Gracetime = defGrace
	}
	if c.KeySize == 0 {
		c.KeySize = defKeySize
	}

	replace := func(s string) string { return strings.Replace(s, ".", "_", -1) }

	for i, pro := range c.Provider {
		if pro.Directory == "" {
			pro.Directory = acme.LE1
		}
		c.Provider[i] = pro
		for i, acc := range pro.Account {
			if acc.KeySize == 0 {
				acc.KeySize = c.KeySize
			}
			if acc.Mail == "" {
				return nil, errNoMail
			}
			if acc.KeyFile == "" {
				return nil, errNoKey
			}
			if c.BaseDir != "" {
				acc.KeyFile = path.Join(c.BaseDir, acc.KeyFile)
			}
			pro.Account[i] = acc
			for i, dom := range acc.Domain {
				if dom.KeySize == 0 {
					dom.KeySize = c.KeySize
				}
				if len(dom.Altnames) == 0 {
					return nil, errNoAltNames
				}
				dom.Altnames = checkWWW(dom.Altnames)
				d := dom.Altnames[0]
				if dom.KeyFile == "" {
					dom.KeyFile = path.Join(keyPath, replace(d)+".key")
				}
				if dom.CrtFile == "" {
					dom.CrtFile = path.Join(crtPath, replace(d)+".pem")
				}
				if c.BaseDir != "" {
					dom.KeyFile = path.Join(c.BaseDir, dom.KeyFile)
					dom.CrtFile = path.Join(c.BaseDir, dom.CrtFile)
				}
				acc.Domain[i] = dom
			}
		}
	}

	return c, nil
}

func checkWWW(altnames []string) []string {
	ch := make(chan string)
	go func(ch chan string, s []string) {
		for _, an := range s {
			if strings.HasPrefix(an, "www.") {
				ch <- an[4:]
			}
		}
		close(ch)
	}(ch, altnames)
	has := func(s string) bool {
		for _, an := range altnames {
			if an == s {
				return true
			}
		}
		return false
	}
	for d := range ch {
		if !has(d) {
			altnames = append(altnames, d)
		}
	}
	return altnames
}