怎么在python中用aes加密一个压缩文件
时间: 2023-06-23 17:56:55 浏览: 107
在 Python 中使用 AES 加密一个压缩文件,需要完成以下步骤:
1. 导入必要的模块
```python
import os
import struct
import random
import hashlib
from Crypto.Cipher import AES
import zlib
```
2. 定义 AES 加密函数
```python
def encrypt_file(key, in_filename, out_filename=None, chunksize=64 * 1024):
if not out_filename:
out_filename = in_filename + '.enc'
iv = ''.join(chr(random.randint(0, 0xFF)) for i in range(16))
encryptor = AES.new(key, AES.MODE_CBC, iv)
filesize = os.path.getsize(in_filename)
with open(in_filename, 'rb') as infile:
with open(out_filename, 'wb') as outfile:
outfile.write(struct.pack('<Q', filesize))
outfile.write(iv)
while True:
chunk = infile.read(chunksize)
if len(chunk) == 0:
break
elif len(chunk) % 16 != 0:
chunk += ' ' * (16 - len(chunk) % 16)
outfile.write(encryptor.encrypt(chunk))
return out_filename
```
3. 定义压缩文件函数
```python
def compress_file(in_filename, out_filename=None, compress_level=9):
if not out_filename:
out_filename = in_filename + '.gz'
with open(in_filename, 'rb') as infile:
with zlib.open(out_filename, 'wb', compresslevel=compress_level) as outfile:
outfile.write(infile.read())
return out_filename
```
4. 定义密钥
```python
key = hashlib.sha256('my_secret_key'.encode()).digest()
```
5. 加密文件
```python
in_filename = 'my_file.txt'
out_filename = 'my_encrypted_file.enc'
compress_level = 9
compress_file(in_filename)
encrypted_file = encrypt_file(key, in_filename, out_filename)
```
通过以上步骤,我们就可以在 Python 中使用 AES 加密一个压缩文件了。
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