woodpecker/server/plugins/encryption/tink_keyset_watcher.go

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// Copyright 2023 Woodpecker Authors
//
// 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 encryption
import (
"fmt"
"github.com/fsnotify/fsnotify"
"github.com/rs/zerolog/log"
)
// Watch keyset file events to detect key rotations and hot reload keys
func (svc *tinkEncryptionService) initFileWatcher() error {
watcher, err := fsnotify.NewWatcher()
if err != nil {
return fmt.Errorf(errTemplateTinkFailedSubscribeKeysetFileChanges, err)
}
err = watcher.Add(svc.keysetFilePath)
if err != nil {
return fmt.Errorf(errTemplateTinkFailedSubscribeKeysetFileChanges, err)
}
svc.keysetFileWatcher = watcher
go svc.handleFileEvents()
return nil
}
func (svc *tinkEncryptionService) handleFileEvents() {
for {
select {
case event, ok := <-svc.keysetFileWatcher.Events:
if !ok {
log.Fatal().Msg(errMessageTinkKeysetFileWatchFailed)
}
if (event.Op == fsnotify.Write) || (event.Op == fsnotify.Create) {
log.Warn().Msgf(logTemplateTinkKeysetFileChanged, event.Name)
err := svc.rotate()
if err != nil {
log.Fatal().Err(err).Msgf(errMessageFailedRotatingEncryption)
}
return
}
case err, ok := <-svc.keysetFileWatcher.Errors:
if !ok {
log.Fatal().Err(err).Msgf(errMessageTinkKeysetFileWatchFailed)
}
}
}
}