woodpecker/server/services/encryption/tink_keyset.go

75 lines
2.3 KiB
Go

// 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 (
"errors"
"fmt"
"os"
"strconv"
"github.com/google/tink/go/aead"
insecure_clear_text_keyset "github.com/google/tink/go/insecurecleartextkeyset"
"github.com/google/tink/go/keyset"
"github.com/rs/zerolog/log"
"go.woodpecker-ci.org/woodpecker/v2/server/store/types"
)
func (svc *tinkEncryptionService) loadKeyset() error {
log.Warn().Msgf(logTemplateTinkLoadingKeyset, svc.keysetFilePath)
file, err := os.Open(svc.keysetFilePath)
if err != nil {
return fmt.Errorf(errTemplateTinkFailedOpeningKeyset, err)
}
defer func(file *os.File) {
err = file.Close()
if err != nil {
log.Error().Err(err).Msgf(logTemplateTinkFailedClosingKeysetFile, svc.keysetFilePath)
}
}(file)
jsonKeyset := keyset.NewJSONReader(file)
keysetHandle, err := insecure_clear_text_keyset.Read(jsonKeyset)
if err != nil {
return fmt.Errorf(errTemplateTinkFailedReadingKeyset, err)
}
svc.primaryKeyID = strconv.FormatUint(uint64(keysetHandle.KeysetInfo().PrimaryKeyId), 10)
encryptionInstance, err := aead.New(keysetHandle)
if err != nil {
return fmt.Errorf(errTemplateTinkFailedInitializingAEAD, err)
}
svc.encryption = encryptionInstance
return nil
}
func (svc *tinkEncryptionService) validateKeyset() error {
ciphertextSample, err := svc.store.ServerConfigGet(ciphertextSampleConfigKey)
if errors.Is(err, types.RecordNotExist) {
return errEncryptionNotEnabled
} else if err != nil {
return fmt.Errorf(errTemplateFailedLoadingServerConfig, err)
}
plaintext, err := svc.Decrypt(ciphertextSample, keyIDAssociatedData)
if plaintext != svc.primaryKeyID {
return errEncryptionKeyRotated
} else if err != nil {
return fmt.Errorf(errTemplateFailedValidatingKey, err)
}
return nil
}