86 lines
2.4 KiB
Go
86 lines
2.4 KiB
Go
/*
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Copyright © 2020 Chris Mellard chris.mellard@icloud.com
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package credhelper
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import (
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"errors"
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"fmt"
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"net/url"
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"regexp"
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"github.com/Azure/go-autorest/autorest/azure/auth"
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"github.com/chrismellard/docker-credential-acr-env/pkg/registry"
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"github.com/chrismellard/docker-credential-acr-env/pkg/token"
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"github.com/docker/docker-credential-helpers/credentials"
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)
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var acrRE = regexp.MustCompile(`.*\.azurecr\.io|.*\.azurecr\.cn|.*\.azurecr\.de|.*\.azurecr\.us`)
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const (
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mcrHostname = "mcr.microsoft.com"
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tokenUsername = "<token>"
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)
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type ACRCredHelper struct {
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}
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func NewACRCredentialsHelper() credentials.Helper {
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return &ACRCredHelper{}
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}
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func (a ACRCredHelper) Add(_ *credentials.Credentials) error {
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return errors.New("list is unimplemented")
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}
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func (a ACRCredHelper) Delete(_ string) error {
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return errors.New("list is unimplemented")
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}
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func isACRRegistry(input string) bool {
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serverURL, err := url.Parse("https://" + input)
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if err != nil {
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return false
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}
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if serverURL.Hostname() == mcrHostname {
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return true
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}
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matches := acrRE.FindStringSubmatch(serverURL.Hostname())
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if len(matches) == 0 {
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return false
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}
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return true
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}
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func (a ACRCredHelper) Get(serverURL string) (string, string, error) {
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if !isACRRegistry(serverURL) {
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return "", "", errors.New("serverURL does not refer to Azure Container Registry")
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}
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spToken, settings, err := token.GetServicePrincipalTokenFromEnvironment()
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if err != nil {
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return "", "", fmt.Errorf("failed to acquire sp token %w", err)
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}
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refreshToken, err := registry.GetRegistryRefreshTokenFromAADExchange(serverURL, spToken, settings.Values[auth.TenantID])
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if err != nil {
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return "", "", fmt.Errorf("failed to acquire refresh token %w", err)
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}
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return tokenUsername, refreshToken, nil
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}
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func (a ACRCredHelper) List() (map[string]string, error) {
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return nil, errors.New("list is unimplemented")
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}
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