Codehub

Appearance

CryptoZip 类和压缩加密示例 ​

本文档介绍了一个用于加密文件并将其压缩成ZIP文件的Python类 CryptoZip。这个类使用了 pyminizip 库进行文件压缩和加密。

This document introduces a Python class CryptoZip for encrypting files and compressing them into ZIP files. The class uses the pyminizip library for compression and encryption.

前置条件 (Prerequisites) ​

在运行该代码之前，需要安装 pyminizip 库，可以使用以下命令进行安装：

Before running the code, you need to install the pyminizip library. You can install it using the following command:

bash
pip install pyminizip

代码详解 (Code Explanation) ​

CryptoZip 类 (CryptoZip Class) ​

CryptoZip 类的主要功能是将文件内容写入临时文件，并将其压缩成加密的ZIP文件。

The main function of the CryptoZip class is to write file content to a temporary file and compress it into an encrypted ZIP file.

python
import pyminizip
from io import BytesIO
from base64 import b64encode
import os
import uuid
import shutil

class CryptoZip:
    def __init__(self, password):
        self.password = password

    def compress_content_as_zip(self, plaintext_name, file_content, crypto_name):
        unique_id = uuid.uuid4().hex
        os.makedirs(unique_id, exist_ok=True)

        crypto_name    = unique_id + '/' + crypto_name
        plaintext_name = unique_id + '/' + plaintext_name

        # Write the content to a temporary file
        with open(plaintext_name, 'wb') as temp_file:
            temp_file.write(file_content)
        
        # Compress the temporary file into an encrypted zip file
        pyminizip.compress(plaintext_name, None, crypto_name, self.password, 5)
        
        # Read the encrypted zip file into a BytesIO object
        encrypted_zip_io = BytesIO()
        with open(crypto_name, 'rb') as encrypted_file:
            encrypted_zip_io.write(encrypted_file.read())
        
        # Clean up the temporary files
        shutil.rmtree(unique_id)
        
        encrypted_zip_io.seek(0)
        return encrypted_zip_io

init 方法 (Method) ​

初始化 CryptoZip 类的实例，接受一个参数 password 作为ZIP文件的加密密码。

Initializes an instance of the CryptoZip class, accepting a parameter password as the encryption password for the ZIP file.

compress_content_as_zip 方法 (Method) ​

将文件内容写入一个临时文件，并将其压缩成加密的ZIP文件，最终返回一个包含加密ZIP文件内容的 BytesIO 对象。

Writes the file content to a temporary file and compresses it into an encrypted ZIP file, eventually returning a BytesIO object containing the encrypted ZIP file content.

参数 (Parameters)：

  • plaintext_name：临时文件的名称 (Name of the temporary file)。
  • file_content：要写入临时文件的内容 (Content to be written to the temporary file)。
  • crypto_name：生成的加密ZIP文件的名称 (Name of the generated encrypted ZIP file)。

main 函数 (Main Function) ​

展示了如何使用 CryptoZip 类进行文件加密和压缩的示例。

Shows an example of how to use the CryptoZip class for file encryption and compression.

python
def main():
    PASSWORD = "test"

    filename = "example"
    plaintext_name = f'{filename}.txt'
    crypto_name    = f'{filename}.zip'

    file_content = b"example content"

    crypto_zip = CryptoZip(PASSWORD)
    zip_file = crypto_zip.compress_content_as_zip(plaintext_name, file_content, crypto_name)
    zip_file_bytes = zip_file.getvalue()
    print(len(zip_file_bytes))
    print(zip_file_bytes)

if __name__ == "__main__":
    main()

示例详解 (Example Explanation) ​

  1. 设置密码 PASSWORD (Set password PASSWORD)。
  2. 定义文件名 filename、明文文件名 plaintext_name 和加密ZIP文件名 crypto_name (Define file name filename, plaintext file name plaintext_name, and encrypted ZIP file name crypto_name)。
  3. 设置文件内容 file_content (Set file content file_content)。
  4. 创建 CryptoZip 类的实例 crypto_zip (Create an instance of the CryptoZip class crypto_zip)。
  5. 调用 compress_content_as_zip 方法进行文件加密和压缩，并获取ZIP文件的字节内容 zip_file_bytes (Call the compress_content_as_zip method to encrypt and compress the file, and get the byte content of the ZIP file zip_file_bytes)。
  6. 打印ZIP文件的字节长度和内容 (Print the byte length and content of the ZIP file)。

通过上述代码，您可以将任意文件内容加密并压缩成ZIP文件，同时获取ZIP文件的字节流内容。

With the above code, you can encrypt and compress any file content into a ZIP file, and also get the byte stream content of the ZIP file.