/
user.go
202 lines (172 loc) · 4.34 KB
/
user.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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
package user
import (
"os/user"
"path/filepath"
"crypto/rand"
"crypto/rsa"
"crypto/x509"
"encoding/base64"
"encoding/pem"
"io/ioutil"
"os"
"github.com/micro/micro/v3/service/logger"
)
var (
Dir = ""
path = ".micro"
)
func init() {
user, err := user.Current()
if err != nil {
logger.Fatalf(err.Error())
}
Dir = filepath.Join(user.HomeDir, path)
err = os.MkdirAll(Dir, 0700)
if err != nil {
logger.Fatalf(err.Error())
}
}
// GetConfigSecretKey returns local keys or generates and returns them for
// config secret encoding/decoding.
func GetConfigSecretKey() (string, error) {
key := filepath.Join(Dir, "config_secret_key")
if !fileExists(key) {
err := setupConfigSecretKey(key)
if err != nil {
return "", err
}
}
logger.Debugf("Loading config key from %v", key)
dat, err := ioutil.ReadFile(key)
if err != nil {
return "", err
}
return string(dat), nil
}
func setupConfigSecretKey(path string) error {
logger.Debugf("Setting up config key to %v", path)
bytes := make([]byte, 32) //generate a random 32 byte key for AES-256
if _, err := rand.Read(bytes); err != nil {
return err
}
file, err := os.OpenFile(path, os.O_RDONLY|os.O_CREATE, 0644)
if err != nil {
return err
}
file.Close()
err = ioutil.WriteFile(path, []byte(base64.StdEncoding.EncodeToString(bytes)), 0600)
if err != nil {
return err
}
return nil
}
// GetJWTCerts returns local keys or generates and returns them for JWT auth.GetJWTCerts
// This is only here for "0 dep", so people don't have to create and load the certs themselves,
// not really intended for serious production use.
func GetJWTCerts() ([]byte, []byte, error) {
privKey := filepath.Join(Dir, "id_rsa")
pubKey := filepath.Join(Dir, "id_rsa.pub")
logger.Debugf("Loading keys %v and %v", privKey, pubKey)
if !fileExists(privKey) || !fileExists(pubKey) {
err := setupKeys(privKey, pubKey)
if err != nil {
return nil, nil, err
}
}
privDat, err := ioutil.ReadFile(privKey)
if err != nil {
return nil, nil, err
}
pubDat, err := ioutil.ReadFile(pubKey)
if err != nil {
return nil, nil, err
}
return privDat, pubDat, nil
}
func setupKeys(privKey, pubKey string) error {
logger.Infof("Setting up keys for JWT at %v and %v", privKey, pubKey)
bitSize := 4096
privateKey, err := generatePrivateKey(bitSize)
if err != nil {
return err
}
publicKeyBytes, err := generatePublicKey(&privateKey.PublicKey)
if err != nil {
return err
}
privateKeyBytes, err := encodePrivateKeyToPEM(privateKey)
if err != nil {
return err
}
err = writeKeyToFile(privateKeyBytes, privKey)
if err != nil {
return err
}
err = writeKeyToFile([]byte(publicKeyBytes), pubKey)
if err != nil {
return err
}
return nil
}
func fileExists(filename string) bool {
info, err := os.Stat(filename)
if os.IsNotExist(err) {
return false
}
return !info.IsDir()
}
// taken from https://gist.github.com/devinodaniel/8f9b8a4f31573f428f29ec0e884e6673
// generatePrivateKey creates a RSA Private Key of specified byte size
func generatePrivateKey(bitSize int) (*rsa.PrivateKey, error) {
// Private Key generation
privateKey, err := rsa.GenerateKey(rand.Reader, bitSize)
if err != nil {
return nil, err
}
// Validate Private Key
err = privateKey.Validate()
if err != nil {
return nil, err
}
return privateKey, nil
}
// encodePrivateKeyToPEM encodes Private Key from RSA to PEM format
func encodePrivateKeyToPEM(privateKey *rsa.PrivateKey) ([]byte, error) {
// Get ASN.1 DER format
privDER := x509.MarshalPKCS1PrivateKey(privateKey)
// pem.Block
privBlock := pem.Block{
Type: "RSA PRIVATE KEY",
Headers: nil,
Bytes: privDER,
}
// Private key in PEM format
privatePEM := pem.EncodeToMemory(&privBlock)
return privatePEM, nil
}
func generatePublicKey(publickey *rsa.PublicKey) ([]byte, error) {
pubDER, err := x509.MarshalPKIXPublicKey(publickey)
if err != nil {
return nil, err
}
pubBlock := pem.Block{
Type: "PUBLIC KEY",
Headers: nil,
Bytes: pubDER,
}
pubPEM := pem.EncodeToMemory(&pubBlock)
return pubPEM, nil
}
// writeKeyToFile writes keys to a file
func writeKeyToFile(keyBytes []byte, saveFileTo string) error {
file, err := os.OpenFile(saveFileTo, os.O_RDONLY|os.O_CREATE, 0644)
if err != nil {
return err
}
file.Close()
err = ioutil.WriteFile(saveFileTo, []byte(base64.StdEncoding.EncodeToString(keyBytes)), 0600)
if err != nil {
return err
}
return nil
}