用python对文件内容进行加密的2种方式

方式1：有时候我们手中文件的内容十分的重要、十分地机密，我们可以选择对此进行加密，代码如下:

from cryptography.fernet import Fernet

def encrypt(filename, key):
    fernet = Fernet(key)
    with open(filename, 'rb') as file:
        original = file.read()
    encrypted = fernet.encrypt(original)
    with open(filename, 'wb') as enc_file:
        enc_file.write(encrypted)
        
key = Fernet.generate_key()
filename = "file.txt"
encrypt(filename, key)

方式2：使用RSA加密算法实现数据的加密解密：

import os
import rsa

def encrypt_file(file_path, public_key_file):
    """使用RSA算法加密文件
    
    参数：
    file_path: 需要加密的文件路径
    public_key_file: 公钥文件路径
    
    返回值：
    无
    """
    # 读取文件内容
    with open(file_path, "rb") as file:
        file_content = file.read()
    # 读取公钥
    with open(public_key_file, "rb") as key_file:
        public_key = rsa.PublicKey.load_pkcs1(key_file.read())
    # 加密文件内容
    encrypted_content = rsa.encrypt(file_content, public_key)
    # 将加密后的内容写入文件
    with open(file_path, "wb") as file:
        file.write(encrypted_content)

def decrypt_file(file_path, private_key_file, password):
    """使用RSA算法解密文件
    
    参数：
    file_path: 需要解密的文件路径
    private_key_file: 私钥文件路径
    password: 私钥文件密码
    
    返回值：
    无
    """
    # 读取文件内容
    with open(file_path, "rb") as file:
        encrypted_content = file.read()
    # 读取私钥
    with open(private_key_file, "rb") as key_file:
        private_key = rsa.PrivateKey.load_pkcs1(key_file.read(), password)
    # 解密文件内容
    file_content = rsa.decrypt(encrypted_content, private_key)
    # 将解密后的内容写入文件
    with open(file_path, "wb") as file:
        file.write(file_content)