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
|
package storage
import (
"crypto/elliptic"
"github.com/hlandau/acmetool/fdb"
"strings"
)
// Legacy Configuration
func (s *fdbStore) loadWebrootPaths() {
if len(s.defaultTarget.Request.Challenge.WebrootPaths) != 0 {
// Path list in default target file takes precedence.
return
}
webrootPath, _ := fdb.String(s.db.Collection("conf").Open("webroot-path")) // ignore errors
webrootPath = strings.TrimSpace(webrootPath)
webrootPaths := strings.Split(webrootPath, "\n")
for i := range webrootPaths {
webrootPaths[i] = strings.TrimSpace(webrootPaths[i])
}
if len(webrootPaths) == 1 && webrootPaths[0] == "" {
webrootPaths = nil
}
s.defaultTarget.Request.Challenge.WebrootPaths = webrootPaths
}
func (s *fdbStore) loadRSAKeySize() {
if s.defaultTarget.Request.Key.RSASize != 0 {
// setting in default target file takes precedence
return
}
n, err := fdb.Uint(s.db.Collection("conf"), "rsa-key-size", 31)
if err != nil {
return
}
s.defaultTarget.Request.Key.RSASize = int(n)
if nn := clampRSAKeySize(int(n)); nn != int(n) {
log.Warnf("An RSA key size of %d is not supported; must have %d <= size <= %d; clamping at %d", n, minRSASize, maxRSASize, nn)
}
}
// Key Parameters
const (
minRSASize = 2048
defaultRSASize = 2048
maxRSASize = 4096
)
func clampRSAKeySize(sz int) int {
if sz == 0 {
return defaultRSASize
}
if sz < minRSASize {
return minRSASize
}
if sz > maxRSASize {
return maxRSASize
}
return sz
}
const defaultCurve = "nistp256"
// Make sure the curve name is valid and use a default curve name. "clamp" is
// not the sanest name here but is consistent with clampRSAKeySize.
func clampECDSACurve(curveName string) string {
switch curveName {
case "nistp256", "nistp384", "nistp521":
return curveName
default:
return defaultCurve
}
}
func getECDSACurve(curveName string) elliptic.Curve {
switch clampECDSACurve(curveName) {
case "nistp256":
return elliptic.P256()
case "nistp384":
return elliptic.P384()
case "nistp521":
return elliptic.P521()
default:
return nil
}
}
|
