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
|
// Copyright 2025 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 verifier
import (
"context"
"net/http"
"github.com/openpubkey/openpubkey/pktoken"
"github.com/zitadel/oidc/v3/pkg/client/rp"
"github.com/zitadel/oidc/v3/pkg/oidc"
)
// UserInfoRequester enables the retrieval of user info from an OpenID Provider
// using the access token obtained during authentication. It uses the PK Token
// look up the issuer URI for the OpenID Provider and ensure that the subject
// (sub claim) in the ID token matches the subject in the access token.
type UserInfoRequester struct {
Issuer string
Subject string
AccessToken string
HttpClient *http.Client
}
func NewUserInfoRequester(pkt *pktoken.PKToken, accessToken string) (*UserInfoRequester, error) {
issuer, err := pkt.Issuer()
if err != nil {
return nil, err
}
sub, err := pkt.Subject()
if err != nil {
return nil, err
}
return &UserInfoRequester{
Issuer: issuer,
Subject: sub,
AccessToken: accessToken,
}, nil
}
// Request calls an OpenID Provider's user info endpoint using the provided access token.
// The access token must match subject (sub claim) in the ID token issued alongside that
// access token. This function returns the user info JSON as a string.
func (ui *UserInfoRequester) Request(ctx context.Context) (string, error) {
httpClient := http.DefaultClient
if ui.HttpClient != nil {
httpClient = ui.HttpClient
}
// We use zitadel/oidc to call the userinfo endpoint rather than calling
// the endpoint directly to take advantage of the zitadel's ability to use
// HTTP proxies in requests.
relyingParty, err := rp.NewRelyingPartyOIDC(ctx, ui.Issuer, "", "", "", nil, rp.WithHTTPClient(httpClient))
if err != nil {
return "", err
}
info, err := rp.Userinfo[*oidc.UserInfo](
ctx,
ui.AccessToken,
"Bearer",
ui.Subject,
relyingParty,
)
if err != nil {
return "", err
}
jsonInfo, err := info.MarshalJSON()
if err != nil {
// We should not reach this because rp.NewRelyingPartyOIDC already unmarshals the JSON to check the sub
return "", err
}
return string(jsonInfo), nil
}
|
