-
Notifications
You must be signed in to change notification settings - Fork 0
/
jwt.go
90 lines (72 loc) · 1.91 KB
/
jwt.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
package libjson
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"fmt"
"github.com/dgrijalva/jwt-go"
jsoniter "github.com/json-iterator/go"
"github.com/lwpyr/goscript/common"
"io/ioutil"
"net/http"
)
func JwtParse(_ *common.Memory, stk *common.Stack) {
token := (stk.Top()).(string)
parsedToken, err := jwt.Parse(token, func(token *jwt.Token) (interface{}, error) {
return getTokenKey(token)
})
if err != nil {
panic(err)
}
m := make(map[string]interface{})
headerMap := make(map[interface{}]interface{})
for k, v := range parsedToken.Header {
headerMap[k] = v
}
m["header"] = headerMap
m["payload"] = jsonObjectify(parsedToken.Claims)
m["signature"] = parsedToken.Signature
stk.ReturnValue(m)
}
func getTokenKey(token *jwt.Token) (interface{}, error) {
resp, err := http.Get(token.Header["x5u"].(string))
if err != nil {
return false, err
}
defer resp.Body.Close()
key, err := ioutil.ReadAll(resp.Body)
parsedKey, err := parseRSAPublicKeyFromPEM(key)
if err != nil {
return false, err
}
return parsedKey, nil
}
func parseRSAPublicKeyFromPEM(key []byte) (*rsa.PublicKey, error) {
var err error
// Parse PEM block
var block *pem.Block
if block, _ = pem.Decode(key); block == nil {
return nil, fmt.Errorf("invalid KeyType: KeyType must be a PEM encoded PKCS1 or PKCS8 key")
}
// Parse the key
var parsedKey interface{}
if parsedKey, err = x509.ParsePKIXPublicKey(block.Bytes); err != nil {
if cert, err := x509.ParseCertificate(block.Bytes); err == nil {
parsedKey = cert.PublicKey
} else {
return nil, err
}
}
var pkey *rsa.PublicKey
var ok bool
if pkey, ok = parsedKey.(*rsa.PublicKey); !ok {
return nil, fmt.Errorf("key is not a valid RSA public key")
}
return pkey, nil
}
func jsonObjectify(s interface{}) map[string]interface{} {
var payload map[string]interface{}
bytes, _ := jsoniter.Marshal(s)
_ = jsoniter.Unmarshal(bytes, &payload)
return payload
}