-
Notifications
You must be signed in to change notification settings - Fork 0
/
ca.go
84 lines (67 loc) · 2.42 KB
/
ca.go
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
package gopki
import (
"crypto"
"crypto/rand"
"crypto/x509"
"math/big"
"time"
)
type CA struct {
priv crypto.PrivateKey
Bytes []byte
Certificate *x509.Certificate
certificateSerialNumber *big.Int
}
func NewCA(dn string, years int, pub crypto.PublicKey, priv crypto.PrivateKey) (c *CA, e error) {
pkixName, err := ConvertDNToPKIXName(dn)
if err != nil {
return nil, err
}
caTemplate := x509.Certificate{
SerialNumber: big.NewInt(2019),
Subject: *pkixName,
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(years,0,0),
KeyUsage: x509.KeyUsageCertSign | x509.KeyUsageCRLSign,
BasicConstraintsValid: true,
IsCA: true,
MaxPathLenZero: true,
}
caTmp, err := x509.CreateCertificate(rand.Reader, &caTemplate, &caTemplate, pub, priv)
if err != nil {
return nil, err
}
certif, _ := x509.ParseCertificate(caTmp)
return &CA{priv,caTmp, certif, big.NewInt(1)}, nil
}
func LoadCA(cacert []byte, priv crypto.PrivateKey, serialNumber big.Int) (c *CA, e error) {
certif, err := x509.ParseCertificate(cacert)
if err != nil {
return nil, err
}
return &CA{priv, cacert, certif, &serialNumber}, nil
}
func (ca *CA)createTLSCertificate(dn string, pub crypto.PublicKey, extKeyUsage []x509.ExtKeyUsage) (cert []byte, err error) {
pkixName, err := ConvertDNToPKIXName(dn)
if err != nil {
return nil, err
}
certTemplate := x509.Certificate{
SerialNumber: ca.certificateSerialNumber,
Subject: *pkixName,
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(1,0,0),
KeyUsage: x509.KeyUsageKeyEncipherment | x509.KeyUsageDigitalSignature,
ExtKeyUsage: extKeyUsage,
BasicConstraintsValid: true,
IsCA: false,
}
ca.certificateSerialNumber.Add(ca.certificateSerialNumber, big.NewInt(1))
return x509.CreateCertificate(rand.Reader, &certTemplate, ca.Certificate, pub, ca.priv)
}
func (ca *CA)CreateTLSClientCertificate(dn string, pub crypto.PublicKey) (cert []byte, err error) {
return ca.createTLSCertificate(dn, pub, []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth})
}
func (ca *CA)CreateTLSServerCertificate(dn string, pub crypto.PublicKey) (cert []byte, err error) {
return ca.createTLSCertificate(dn, pub, []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth})
}