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- // Copyright 2022 The Gitea Authors. All rights reserved.
- // SPDX-License-Identifier: MIT
-
- package util
-
- import (
- "crypto/aes"
- "crypto/cipher"
- "crypto/rand"
- "errors"
- "io"
- "os"
- )
-
- // CopyFile copies file from source to target path.
- func CopyFile(src, dest string) error {
- si, err := os.Lstat(src)
- if err != nil {
- return err
- }
-
- sr, err := os.Open(src)
- if err != nil {
- return err
- }
- defer sr.Close()
-
- dw, err := os.Create(dest)
- if err != nil {
- return err
- }
- defer dw.Close()
-
- if _, err = io.Copy(dw, sr); err != nil {
- return err
- }
-
- if err = os.Chtimes(dest, si.ModTime(), si.ModTime()); err != nil {
- return err
- }
- return os.Chmod(dest, si.Mode())
- }
-
- // AESGCMEncrypt (from legacy package): encrypts plaintext with the given key using AES in GCM mode. should be replaced.
- func AESGCMEncrypt(key, plaintext []byte) ([]byte, error) {
- block, err := aes.NewCipher(key)
- if err != nil {
- return nil, err
- }
-
- gcm, err := cipher.NewGCM(block)
- if err != nil {
- return nil, err
- }
-
- nonce := make([]byte, gcm.NonceSize())
- if _, err := rand.Read(nonce); err != nil {
- return nil, err
- }
-
- ciphertext := gcm.Seal(nil, nonce, plaintext, nil)
- return append(nonce, ciphertext...), nil
- }
-
- // AESGCMDecrypt (from legacy package): decrypts ciphertext with the given key using AES in GCM mode. should be replaced.
- func AESGCMDecrypt(key, ciphertext []byte) ([]byte, error) {
- block, err := aes.NewCipher(key)
- if err != nil {
- return nil, err
- }
-
- gcm, err := cipher.NewGCM(block)
- if err != nil {
- return nil, err
- }
-
- size := gcm.NonceSize()
- if len(ciphertext)-size <= 0 {
- return nil, errors.New("ciphertext is empty")
- }
-
- nonce := ciphertext[:size]
- ciphertext = ciphertext[size:]
-
- plainText, err := gcm.Open(nil, nonce, ciphertext, nil)
- if err != nil {
- return nil, err
- }
-
- return plainText, nil
- }
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