macOS下实现文件加密的示例代码与解决方案

本示例演示在macOS上使用Python实现文件加密和解密的功能。通过使用cryptography库，可以轻松实现对敏感文件的保护，确保数据的安全性。

from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives import hashes
from cryptography.hazmat.primitives.kdf.pbkdf2 import PBKDF2HMAC
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes
import os

def encrypt_file(password, input_file, output_file):
    # 通过PBKDF2HMAC获取密钥
    kdf = PBKDF2HMAC(
        algorithm=hashes.SHA256(),
        iterations=100000,
        salt=os.urandom(16),
        length=32,
        backend=default_backend()
    )
    key = kdf.derive(password.encode())

    # 生成随机的IV（Initialization Vector）
    iv = os.urandom(16)

    # 使用AES-GCM加密文件
    cipher = Cipher(algorithms.AES(key), modes.GCM(iv), backend=default_backend())
    encryptor = cipher.encryptor()

    with open(input_file, 'rb') as file_in:
        with open(output_file, 'wb') as file_out:
            file_out.write(iv)
            for chunk in iter(lambda: file_in.read(4096), b''):
                encrypted_chunk = encryptor.update(chunk)
                file_out.write(encrypted_chunk)

def decrypt_file(password, input_file, output_file):
    with open(input_file, 'rb') as file_in:
        # 从文件中读取IV
        iv = file_in.read(16)

        # 通过PBKDF2HMAC获取密钥
        kdf = PBKDF2HMAC(
            algorithm=hashes.SHA256(),
            iterations=100000,
            salt=os.urandom(16),
            length=32,
            backend=default_backend()
        )
        key = kdf.derive(password.encode())

        # 使用AES-GCM解密文件
        cipher = Cipher(algorithms.AES(key), modes.GCM(iv), backend=default_backend())
        decryptor = cipher.decryptor()

        with open(output_file, 'wb') as file_out:
            for chunk in iter(lambda: file_in.read(4096), b''):
                decrypted_chunk = decryptor.update(chunk)
                file_out.write(decrypted_chunk)

# 使用示例
encrypt_file("my_secret_password", "sensitive_data.txt", "encrypted_data.bin")
decrypt_file("my_secret_password", "encrypted_data.bin", "decrypted_data.txt")

免责申明：文章和图片全部来源于公开网络，如有侵权，请通知删除 server@dude6.com