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
|
// Copyright 2022 Google LLC All Rights Reserved.
//
// 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 github provides a keychain for the GitHub Container Registry.
package github
import (
"net/url"
"os"
"github.com/google/go-containerregistry/pkg/authn"
)
const ghcrHostname = "ghcr.io"
// Keychain exports an instance of the GitHub Keychain.
//
// This keychain matches on requests for ghcr.io and provides the value of the
// environment variable $GITHUB_TOKEN, if it's set.
var Keychain authn.Keychain = githubKeychain{}
type githubKeychain struct{}
func (githubKeychain) Resolve(r authn.Resource) (authn.Authenticator, error) {
serverURL, err := url.Parse("https://" + r.String())
if err != nil {
return authn.Anonymous, nil
}
if serverURL.Hostname() == ghcrHostname {
username := os.Getenv("GITHUB_ACTOR")
if username == "" {
username = "unset"
}
if tok := os.Getenv("GITHUB_TOKEN"); tok != "" {
return githubAuthenticator{username, tok}, nil
}
}
return authn.Anonymous, nil
}
type githubAuthenticator struct{ username, password string }
func (g githubAuthenticator) Authorization() (*authn.AuthConfig, error) {
return &authn.AuthConfig{
Username: g.username,
Password: g.password,
}, nil
}
|
