-
Notifications
You must be signed in to change notification settings - Fork 8
/
tls.go
150 lines (128 loc) · 3.69 KB
/
tls.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
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
package helpers
import (
"bytes"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"crypto/x509/pkix"
"encoding/pem"
"fmt"
"math/big"
"net"
"time"
)
type CAPEM []byte
type CAPrivateKey []byte
type ServerCertPEM []byte
type ServerPrivateKey []byte
var default_ca = &x509.Certificate{
SerialNumber: big.NewInt(2019),
Subject: pkix.Name{
Organization: []string{"F5"},
Country: []string{"US"},
Province: []string{""},
Locality: []string{"Seattle"},
StreetAddress: []string{"WA Corporate HQ 801 5th Ave"},
PostalCode: []string{"98104"},
},
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(10, 0, 0),
IsCA: true,
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
KeyUsage: x509.KeyUsageDigitalSignature | x509.KeyUsageCertSign,
BasicConstraintsValid: true,
}
func sign(crt, ca *x509.Certificate, caPrivKey *rsa.PrivateKey) ([]byte, []byte, error) {
rawCrtBytes, err := x509.CreateCertificate(rand.Reader, crt, ca, &caPrivKey.PublicKey, caPrivKey)
if err != nil {
return nil, nil, err
}
crtPem := &bytes.Buffer{}
if err = pem.Encode(crtPem, &pem.Block{
Type: "CERTIFICATE",
Bytes: rawCrtBytes,
}); err != nil {
return nil, nil, err
}
crtPrivKeyPem := &bytes.Buffer{}
if err = pem.Encode(crtPrivKeyPem, &pem.Block{
Type: "RSA PRIVATE KEY",
Bytes: x509.MarshalPKCS1PrivateKey(caPrivKey),
}); err != nil {
return nil, nil, err
}
return crtPem.Bytes(), crtPrivKeyPem.Bytes(), nil
}
func GenerateCA(ca *x509.Certificate) (CAPEM, CAPrivateKey, error) {
if ca == nil {
ca = default_ca
}
rawPrivKey, err := rsa.GenerateKey(rand.Reader, 4096)
if err != nil {
return nil, nil, err
}
return sign(ca, ca, rawPrivKey)
}
var default_cert = &x509.Certificate{
SerialNumber: big.NewInt(2019),
Subject: pkix.Name{
Organization: []string{"F5, Dev."},
Country: []string{"CN"},
Province: []string{""},
Locality: []string{"Beijing"},
StreetAddress: []string{"Jiang Guo Road"},
PostalCode: []string{"100000"},
},
IPAddresses: []net.IP{net.IPv4(127, 0, 0, 1), net.IPv6loopback},
NotBefore: time.Now(),
NotAfter: time.Now().AddDate(10, 0, 0),
SubjectKeyId: []byte{1, 2, 3, 4, 5},
ExtKeyUsage: []x509.ExtKeyUsage{x509.ExtKeyUsageClientAuth, x509.ExtKeyUsageServerAuth},
KeyUsage: x509.KeyUsageDigitalSignature,
}
func GenerateServerCert(serverCert *x509.Certificate, caPem CAPEM, caPrivKeyPem CAPrivateKey) (ServerCertPEM, ServerPrivateKey, error) {
caPemBlock, _ := pem.Decode(caPem)
if caPemBlock == nil {
return nil, nil, fmt.Errorf("can not decode CA Certificate")
}
ca, err := x509.ParseCertificate(caPemBlock.Bytes)
if err != nil {
return nil, nil, err
}
caPrivKeyBlock, _ := pem.Decode(caPrivKeyPem)
if caPrivKeyBlock == nil {
return nil, nil, fmt.Errorf("can not decode CA Private Key")
}
caPrivKey, err := x509.ParsePKCS1PrivateKey(caPrivKeyBlock.Bytes)
if err != nil {
return nil, nil, err
}
if serverCert == nil {
serverCert = default_cert
}
return sign(serverCert, ca, caPrivKey)
}
func VerifyServerWithCA(caPem []byte, serverPem []byte) error {
caBlock, _ := pem.Decode(caPem)
if caBlock == nil {
return fmt.Errorf("can not decode CA Certificate")
}
serverBlock, _ := pem.Decode(serverPem)
if serverBlock == nil {
return fmt.Errorf("can not decode Server Certificate")
}
serverCert, err := x509.ParseCertificate(serverBlock.Bytes)
if err != nil {
return err
}
root := x509.NewCertPool()
if !root.AppendCertsFromPEM(caPem) {
return fmt.Errorf("can not add root Certificate")
}
if _, err := serverCert.Verify(x509.VerifyOptions{
Roots: root,
}); err != nil {
return err
}
return nil
}