/
google.go
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/
google.go
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// Copyright 2024 Google LLC
//
// 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 auth
import (
"context"
"fmt"
"net/http"
"strings"
"github.com/go-logr/logr"
"golang.org/x/oauth2"
"golang.org/x/oauth2/google"
"k8s.io/client-go/rest"
)
var defaultGoogleScopes = []string{
"https://www.googleapis.com/auth/cloud-platform",
"https://www.googleapis.com/auth/userinfo.email",
}
const (
googleAuthPluginName = "google"
googleScopesKey = "scopes"
)
func registerGCP(ctx context.Context, logger logr.Logger) {
logger.Info("Registering Kubernetes client auth provider", "authProvider", googleAuthPluginName)
if err := rest.RegisterAuthProviderPlugin(googleAuthPluginName, func(_ string, config map[string]string, _ rest.AuthProviderConfigPersister) (rest.AuthProvider, error) {
scopes := parseScopes(config)
ts, err := google.DefaultTokenSource(ctx, scopes...)
if err != nil {
return nil, fmt.Errorf("failed to create Google token source: %w", err)
}
return &googleAuthProvider{tokenSource: ts}, nil
}); err != nil {
logger.Error(err, "Could not register Kubernetes client auth provider", "name", googleAuthPluginName)
}
}
func parseScopes(config map[string]string) []string {
scopes, exist := config[googleScopesKey]
if !exist {
return defaultGoogleScopes
}
if scopes == "" {
return []string{}
}
return strings.Split(scopes, ",")
}
var _ rest.AuthProvider = &googleAuthProvider{}
type googleAuthProvider struct {
tokenSource oauth2.TokenSource
}
func (g *googleAuthProvider) WrapTransport(rt http.RoundTripper) http.RoundTripper {
return &oauth2.Transport{
Base: rt,
Source: g.tokenSource,
}
}
func (g *googleAuthProvider) Login() error { return nil }