-
Notifications
You must be signed in to change notification settings - Fork 139
/
verifier.go
74 lines (67 loc) · 2.04 KB
/
verifier.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
// Copyright 2020 The PipeCD Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package jwt
import (
"fmt"
jwtgo "github.com/golang-jwt/jwt"
)
type Verifier interface {
Verify(token string) (*Claims, error)
}
type verifier struct {
key interface{}
method jwtgo.SigningMethod
}
// NewVerifier returns a new verifier using given signing method.
func NewVerifier(method jwtgo.SigningMethod, keyFile string) (Verifier, error) {
key, err := readKeyFile(method, keyFile, false)
if err != nil {
return nil, fmt.Errorf("unable to read key file: %v", err)
}
return &verifier{
key: key,
method: method,
}, nil
}
func (v *verifier) Verify(tokenString string) (*Claims, error) {
token, err := jwtgo.ParseWithClaims(tokenString, &Claims{}, func(token *jwtgo.Token) (interface{}, error) {
if v.method != token.Method {
return nil, fmt.Errorf("unexpected signing method: %v", token.Method.Alg())
}
return v.key, nil
})
if err != nil {
return nil, fmt.Errorf("unable to parse token: %v", err)
}
if !token.Valid {
return nil, fmt.Errorf("token is not valid")
}
claims, ok := token.Claims.(*Claims)
if !ok {
return nil, fmt.Errorf("unexpected claims type: %T", token.Claims)
}
if !claims.VerifyIssuer(Issuer, true) {
return nil, fmt.Errorf("invalid issuer: %s", claims.Issuer)
}
if claims.IssuedAt == 0 {
return nil, fmt.Errorf("missing issuedAt")
}
if claims.ExpiresAt == 0 {
return nil, fmt.Errorf("missing expiresAt")
}
if claims.NotBefore == 0 {
return nil, fmt.Errorf("missing notBefore")
}
return claims, nil
}