/
encrypt.go
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/
encrypt.go
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// Copyright 2023 The GitBundle Inc. All rights reserved.
// Copyright 2017 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
// Copyright 2019 Drone IO, Inc.
//
// 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 encrypt
import (
"crypto/aes"
"errors"
)
// indicates key size is too small.
var errKeySize = errors.New("encryption key must be 32 bytes")
// Encrypter provides database field encryption and decryption.
// Encrypted values are currently limited to strings, which is
// reflected in the interface design.
type Encrypter interface {
Encrypt(plaintext string) ([]byte, error)
Decrypt(ciphertext []byte) (string, error)
}
// New provides a new database field encrypter.
func New(key string) (Encrypter, error) {
if len(key) != 32 {
return nil, errKeySize
}
b := []byte(key)
block, err := aes.NewCipher(b)
if err != nil {
return nil, err
}
return &Aesgcm{block: block}, nil
}