/
preshared.go
116 lines (98 loc) · 2.76 KB
/
preshared.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
// Copyright 2016 CoreOS, Inc
//
// 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 preshared
import (
"crypto/rsa"
"crypto/x509"
"encoding/pem"
"errors"
"fmt"
"io/ioutil"
"strings"
"github.com/coreos/go-oidc/jose"
"github.com/coreos/go-oidc/key"
"gopkg.in/yaml.v2"
"github.com/quay/jwtproxy/config"
"github.com/quay/jwtproxy/jwt/keyserver"
"github.com/quay/jwtproxy/stop"
)
func init() {
keyserver.RegisterReader("preshared", constructor)
}
type Preshared struct {
*key.PublicKey
Issuer string
}
type Config struct {
Issuer string `yaml:"issuer"`
KeyID string `yaml:"key_id"`
PublicKeyPath string `yaml:"public_key_path"`
}
func constructor(registrableComponentConfig config.RegistrableComponentConfig) (keyserver.Reader, error) {
var cfg Config
bytes, err := yaml.Marshal(registrableComponentConfig.Options)
if err != nil {
return nil, err
}
err = yaml.Unmarshal(bytes, &cfg)
if err != nil {
return nil, err
}
publicKey, err := loadPublicKey(cfg.PublicKeyPath)
if err != nil {
return nil, err
}
return &Preshared{
Issuer: cfg.Issuer,
PublicKey: key.NewPublicKey(jose.JWK{
ID: cfg.KeyID,
Use: "sig",
Type: "RSA",
Alg: "RS256",
Modulus: publicKey.N,
Exponent: publicKey.E,
}),
}, nil
}
func (preshared *Preshared) GetPublicKey(issuer string, keyID string) (*key.PublicKey, error) {
if !strings.EqualFold(issuer, preshared.Issuer) || !strings.EqualFold(keyID, preshared.ID()) {
return nil, errors.New("unknown public key")
}
return preshared.PublicKey, nil
}
func (preshared *Preshared) Stop() <-chan struct{} {
return stop.AlreadyDone
}
func loadPublicKey(path string) (*rsa.PublicKey, error) {
publicKeyData, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
publicKeyBlock, _ := pem.Decode(publicKeyData)
if publicKeyBlock == nil {
return nil, errors.New("bad public key data")
}
if publicKeyBlock.Type != "PUBLIC KEY" {
return nil, fmt.Errorf("unknown key type : %s", publicKeyBlock.Type)
}
publicKey, err := x509.ParsePKIXPublicKey(publicKeyBlock.Bytes)
if err != nil {
return nil, err
}
rsaPublicKey, ok := publicKey.(*rsa.PublicKey)
if !ok {
return nil, errors.New("parsed public key doesn't appear to be an RSA public key")
}
return rsaPublicKey, nil
}