des算法加解密代码 为什么这段代码显示错误？

Question

from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives.ciphers import Cipher, algorithms, modes


def des_encrypt(plaintext: str, key: bytes) -> bytes:
    cipher = Cipher(algorithms.DES(key), modes.ECB(), backend=default_backend())
    encryptor = cipher.encryptor()
    return encryptor.update(plaintext.encode()) + encryptor.finalize()


def des_decrypt(ciphertext: bytes, key: bytes) -> str:
    cipher = Cipher(algorithms.DES(key), modes.ECB(), backend=default_backend())
    decryptor = cipher.decryptor()
    return decryptor.update(ciphertext).decode()


# Example key (must be 8 bytes long)
key = b'secretkey'

# Example plaintext
plaintext = 'Hello, World!'

# Encrypt the plaintext
ciphertext = des_encrypt(plaintext, key)
print("Encrypted:", ciphertext)

# Decrypt the ciphertext
decrypted_text = des_decrypt(ciphertext, key)
print("Decrypted:", decrypted_text)

为什么这段代码会出错？ 此附加代码适用于 DES 算法 附上错误显示的图片 我找不到错误 该代码是DES算法的加密和解密

Answer 1

我猜是因为你没有从 Crypto.Cipher 导入 DES