ContainerImage.Pinniped/pkg/client/client.go

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/*
Copyright 2020 VMware, Inc.
SPDX-License-Identifier: Apache-2.0
*/
package client
import (
"context"
"fmt"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
clientauthenticationv1beta1 "k8s.io/client-go/pkg/apis/clientauthentication/v1beta1"
"k8s.io/client-go/tools/clientcmd"
clientcmdapi "k8s.io/client-go/tools/clientcmd/api"
placeholderv1alpha1 "github.com/suzerain-io/placeholder-name-api/pkg/apis/placeholder/v1alpha1"
placeholderclientset "github.com/suzerain-io/placeholder-name-client-go/pkg/generated/clientset/versioned"
"github.com/suzerain-io/placeholder-name/internal/constable"
)
// ErrLoginFailed is returned by ExchangeToken when the server rejects the login request.
const ErrLoginFailed = constable.Error("login failed")
func ExchangeToken(ctx context.Context, token, caBundle, apiEndpoint string) (*clientauthenticationv1beta1.ExecCredential, error) {
clientset, err := getClient(apiEndpoint, caBundle)
if err != nil {
return nil, fmt.Errorf("could not get API client: %w", err)
}
resp, err := clientset.PlaceholderV1alpha1().LoginRequests().Create(ctx, &placeholderv1alpha1.LoginRequest{
Spec: placeholderv1alpha1.LoginRequestSpec{
Type: placeholderv1alpha1.TokenLoginCredentialType,
Token: &placeholderv1alpha1.LoginRequestTokenCredential{
Value: token,
},
},
}, metav1.CreateOptions{})
if err != nil {
return nil, fmt.Errorf("could not login: %w", err)
}
if resp.Status.Credential == nil || resp.Status.Message != "" {
return nil, fmt.Errorf("%w: %s", ErrLoginFailed, resp.Status.Message)
}
return &clientauthenticationv1beta1.ExecCredential{
TypeMeta: metav1.TypeMeta{
Kind: "ExecCredential",
APIVersion: "client.authentication.k8s.io/v1beta1",
},
Status: &clientauthenticationv1beta1.ExecCredentialStatus{
ExpirationTimestamp: resp.Status.Credential.ExpirationTimestamp,
ClientCertificateData: resp.Status.Credential.ClientCertificateData,
ClientKeyData: resp.Status.Credential.ClientKeyData,
},
}, nil
}
// getClient returns an anonymous clientset for the placeholder-name API at the provided endpoint/CA bundle.
func getClient(apiEndpoint string, caBundle string) (placeholderclientset.Interface, error) {
cfg, err := clientcmd.NewNonInteractiveClientConfig(clientcmdapi.Config{
Clusters: map[string]*clientcmdapi.Cluster{
"cluster": {
Server: apiEndpoint,
CertificateAuthorityData: []byte(caBundle),
},
},
Contexts: map[string]*clientcmdapi.Context{
"current": {
Cluster: "cluster",
AuthInfo: "client",
},
},
AuthInfos: map[string]*clientcmdapi.AuthInfo{
"client": {},
},
}, "current", nil, nil).ClientConfig()
if err != nil {
return nil, err
}
return placeholderclientset.NewForConfig(cfg)
}