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
|
// Copyright 2024 OpenPubkey
//
// 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.
//
// SPDX-License-Identifier: Apache-2.0
package oidc
import (
"bytes"
"encoding/json"
"fmt"
"strings"
"github.com/openpubkey/openpubkey/util"
)
type OidcClaims struct {
Issuer string `json:"iss"`
Subject string `json:"sub"`
Audience string `json:"-"`
Expiration int64 `json:"exp"`
IssuedAt int64 `json:"iat"`
Email string `json:"email,omitempty"`
Nonce string `json:"nonce,omitempty"`
Username string `json:"preferred_username,omitempty"`
FirstName string `json:"given_name,omitempty"`
LastName string `json:"family_name,omitempty"`
Groups []string `json:"groups,omitempty"`
Scopes []string `json:"scopes,omitempty"`
}
// Implement UnmarshalJSON for custom handling during JSON unmarshalling
func (id *OidcClaims) UnmarshalJSON(data []byte) error {
// unmarshal audience claim separately to account for []string, https://datatracker.ietf.org/doc/html/rfc7519#section-4.1.3
type Alias OidcClaims
aux := &struct {
Audience any `json:"aud"`
*Alias
}{
Alias: (*Alias)(id),
}
if err := json.Unmarshal(data, &aux); err != nil {
return err
}
switch t := aux.Audience.(type) {
case string:
id.Audience = t
case []any:
audList := []string{}
for _, v := range t {
audList = append(audList, v.(string))
}
id.Audience = strings.Join(audList, ",")
default:
id.Audience = ""
}
return nil
}
// SplitCompact splits a JWT and returns its three parts
// separately: protected headers, payload and signature.
// This is copied from github.com/lestrrat-go/jwx/v2/jws.SplitCompact
// We include it here so so that jwx is not a dependency of simpleJws
func SplitCompact(src []byte) ([]byte, []byte, []byte, error) {
parts := bytes.Split(src, []byte("."))
if len(parts) != 3 {
return nil, nil, nil, fmt.Errorf(`invalid number of segments`)
}
return parts[0], parts[1], parts[2], nil
}
func ParseJWTSegment(segment []byte, v any) error {
segmentJSON, err := util.Base64DecodeForJWT(segment)
if err != nil {
return fmt.Errorf("error decoding segment: %w", err)
}
err = json.Unmarshal(segmentJSON, v)
if err != nil {
return fmt.Errorf("error parsing segment: %w", err)
}
return nil
}
|
