134 lines
4.5 KiB
Go
134 lines
4.5 KiB
Go
/*
|
|
Copyright 2026.
|
|
|
|
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 openbao supplies credentials using one shared client and Kubernetes identity.
|
|
package openbao
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"sync"
|
|
"time"
|
|
|
|
api "git.ddupan.top/panxiao81/postgresql-tenant-operator/api/v1alpha1"
|
|
"git.ddupan.top/panxiao81/postgresql-tenant-operator/internal/instance"
|
|
kubernetesauth "github.com/openbao/openbao/api/auth/kubernetes/v2"
|
|
bao "github.com/openbao/openbao/api/v2"
|
|
)
|
|
|
|
// Credentials owns authentication; database connections never depend on this client.
|
|
type Credentials struct {
|
|
client *bao.Client
|
|
mount string
|
|
authenticate func(context.Context) (*bao.Secret, error)
|
|
mu sync.Mutex
|
|
expires time.Time
|
|
}
|
|
|
|
func NewCredentials(client *bao.Client, mount, authMount, role string) *Credentials {
|
|
source := &Credentials{client: client, mount: mount}
|
|
source.authenticate = func(ctx context.Context) (*bao.Secret, error) {
|
|
// Constructing auth here rereads the projected JWT after Kubernetes rotates it.
|
|
auth, err := kubernetesauth.NewKubernetesAuth(role, kubernetesauth.WithMountPath(authMount))
|
|
if err != nil {
|
|
return nil, instance.Failure{Reason: api.ReasonAuthenticationFailed, Operation: "read Kubernetes identity"}
|
|
}
|
|
return client.Auth().Login(ctx, auth)
|
|
}
|
|
return source
|
|
}
|
|
|
|
func (s *Credentials) login(ctx context.Context) error {
|
|
secret, err := s.authenticate(ctx)
|
|
if err != nil {
|
|
return classify("authenticate to OpenBao", err, true)
|
|
}
|
|
if secret == nil || secret.Auth == nil || secret.Auth.ClientToken == "" || secret.Auth.LeaseDuration <= 0 {
|
|
return instance.Failure{Reason: api.ReasonAuthenticationFailed, Operation: "OpenBao returned no leased identity"}
|
|
}
|
|
s.client.SetToken(secret.Auth.ClientToken)
|
|
ttl := time.Duration(secret.Auth.LeaseDuration) * time.Second
|
|
s.expires = time.Now().Add(ttl - ttl/10)
|
|
return nil
|
|
}
|
|
|
|
func (s *Credentials) Read(ctx context.Context, reference api.OpenBaoSecretReference) (instance.Credentials, error) {
|
|
// Login and reads share a lock so concurrent first-use requests cannot race token replacement.
|
|
s.mu.Lock()
|
|
defer s.mu.Unlock()
|
|
if !time.Now().Before(s.expires) {
|
|
if err := s.login(ctx); err != nil {
|
|
return instance.Credentials{}, err
|
|
}
|
|
}
|
|
secret, err := s.client.KVv2(s.mount).Get(ctx, reference.Path)
|
|
var response *bao.ResponseError
|
|
if errors.As(err, &response) && response.StatusCode == 403 {
|
|
// A token may be revoked before its TTL. Reauthenticate once, never loop on denied policies.
|
|
s.expires = time.Time{}
|
|
if err := s.login(ctx); err != nil {
|
|
return instance.Credentials{}, err
|
|
}
|
|
secret, err = s.client.KVv2(s.mount).Get(ctx, reference.Path)
|
|
}
|
|
if err != nil {
|
|
return instance.Credentials{}, classify("read administrative credential", err, false)
|
|
}
|
|
usernameKey, passwordKey := reference.UsernameKey, reference.PasswordKey
|
|
if usernameKey == "" {
|
|
usernameKey = "username"
|
|
}
|
|
if passwordKey == "" {
|
|
passwordKey = "password"
|
|
}
|
|
if secret == nil {
|
|
return instance.Credentials{}, invalidCredential()
|
|
}
|
|
username, usernameOK := secret.Data[usernameKey].(string)
|
|
password, passwordOK := secret.Data[passwordKey].(string)
|
|
if !usernameOK || !passwordOK || username == "" || password == "" {
|
|
return instance.Credentials{}, invalidCredential()
|
|
}
|
|
return instance.Credentials{Username: username, Password: password}, nil
|
|
}
|
|
|
|
func invalidCredential() error {
|
|
return instance.Failure{Reason: api.ReasonAuthenticationFailed, Operation: "administrative credential fields are missing"}
|
|
}
|
|
|
|
func classify(operation string, err error, login bool) error {
|
|
reason := api.ReasonDependencyUnavailable
|
|
var safe instance.Failure
|
|
if errors.As(err, &safe) {
|
|
return safe
|
|
}
|
|
var response *bao.ResponseError
|
|
if errors.As(err, &response) {
|
|
switch response.StatusCode {
|
|
case 403:
|
|
reason = api.ReasonInsufficientPrivileges
|
|
if login {
|
|
reason = api.ReasonAuthenticationFailed
|
|
}
|
|
case 400, 401:
|
|
reason = api.ReasonAuthenticationFailed
|
|
case 404:
|
|
reason = api.ReasonInvalidSpec
|
|
}
|
|
}
|
|
return instance.Failure{Reason: reason, Operation: operation}
|
|
}
|