woodpecker/server/services/encryption/aes_encryption.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 (
"crypto/aes"
"crypto/cipher"
"errors"
"fmt"
"golang.org/x/crypto/bcrypt"
"golang.org/x/crypto/sha3"
"go.woodpecker-ci.org/woodpecker/v2/server/store/types"
)
func (svc *aesEncryptionService) loadCipher(password string) error {
key, err := svc.hash([]byte(password))
if err != nil {
return fmt.Errorf(errTemplateAesFailedGeneratingKey, err)
}
keyHash, err := bcrypt.GenerateFromPassword(key, bcrypt.DefaultCost)
if err != nil {
return fmt.Errorf(errTemplateAesFailedGeneratingKeyID, err)
}
svc.keyID = string(keyHash)
block, err := aes.NewCipher(key)
if err != nil {
return fmt.Errorf(errTemplateAesFailedLoadingCipher, err)
}
aead, err := cipher.NewGCM(block)
if err != nil {
return fmt.Errorf(errTemplateAesFailedLoadingCipher, err)
}
svc.cipher = aead
return nil
}
func (svc *aesEncryptionService) validateKey() 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.keyID {
return errEncryptionKeyInvalid
} else if err != nil {
return err
}
return nil
}
func (svc *aesEncryptionService) hash(data []byte) ([]byte, error) {
result := make([]byte, 32)
sha := sha3.NewShake256()
_, err := sha.Write(data)
if err != nil {
return nil, fmt.Errorf(errTemplateAesFailedCalculatingHash, err)
}
_, err = sha.Read(result)
if err != nil {
return nil, fmt.Errorf(errTemplateAesFailedCalculatingHash, err)
}
return result, nil
}