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zeekayandHanzo Dev
aa87442fdd
Source files keep their SPDX-License-Identifier and Hanzo copyright line; the Gitea, Gogs and LFS Test Server copyrights they used to repeat now live once in NOTICE, alongside LICENSE. The header lint accepts any copyright line above the SPDX line, so it no longer demands an upstream one. Co-authored-by: Hanzo Dev <[email protected]>
92 lines
1.8 KiB
Go
92 lines
1.8 KiB
Go
// Copyright 2026 Hanzo AI, Inc. All rights reserved.
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// SPDX-License-Identifier: MIT
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package util
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import (
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"crypto/aes"
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"crypto/cipher"
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"crypto/rand"
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"errors"
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"io"
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"os"
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)
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// CopyFile copies file from source to target path.
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func CopyFile(src, dest string) error {
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si, err := os.Lstat(src)
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if err != nil {
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return err
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}
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sr, err := os.Open(src)
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if err != nil {
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return err
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}
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defer sr.Close()
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dw, err := os.Create(dest)
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if err != nil {
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return err
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}
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defer dw.Close()
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if _, err = io.Copy(dw, sr); err != nil {
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return err
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}
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if err = os.Chtimes(dest, si.ModTime(), si.ModTime()); err != nil {
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return err
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}
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return os.Chmod(dest, si.Mode())
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}
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// AESGCMEncrypt (from legacy package): encrypts plaintext with the given key using AES in GCM mode. should be replaced.
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func AESGCMEncrypt(key, plaintext []byte) ([]byte, error) {
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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gcm, err := cipher.NewGCM(block)
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if err != nil {
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return nil, err
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}
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nonce := make([]byte, gcm.NonceSize())
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if _, err := rand.Read(nonce); err != nil {
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return nil, err
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}
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ciphertext := gcm.Seal(nil, nonce, plaintext, nil)
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return append(nonce, ciphertext...), nil
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}
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// AESGCMDecrypt (from legacy package): decrypts ciphertext with the given key using AES in GCM mode. should be replaced.
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func AESGCMDecrypt(key, ciphertext []byte) ([]byte, error) {
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block, err := aes.NewCipher(key)
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if err != nil {
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return nil, err
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}
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gcm, err := cipher.NewGCM(block)
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if err != nil {
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return nil, err
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}
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size := gcm.NonceSize()
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if len(ciphertext)-size <= 0 {
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return nil, errors.New("ciphertext is empty")
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}
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nonce := ciphertext[:size]
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ciphertext = ciphertext[size:]
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plainText, err := gcm.Open(nil, nonce, ciphertext, nil)
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if err != nil {
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return nil, err
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}
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return plainText, nil
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}
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