python - 使用 RSA python 加密消息时出错

Question

使用示例代码使用 RSA 加密消息，但出现以下错误。

Traceback (most recent call last):
  File "E:/PythonProjects/skypy/skypy/codebase/utils/crypto.py", line 32, in <module>
    print(RSAPubKey.encrypt("Hello.", 32))
  File "E:\Programs\Python3.4\lib\site-packages\Crypto\PublicKey\RSA.py", line 150, in encrypt
    return pubkey.pubkey.encrypt(self, plaintext, K)
  File "E:\Programs\Python3.4\lib\site-packages\Crypto\PublicKey\pubkey.py", line 75, in encrypt
    ciphertext=self._encrypt(plaintext, K)
  File "E:\Programs\Python3.4\lib\site-packages\Crypto\PublicKey\RSA.py", line 224, in _encrypt
    return (self.key._encrypt(c),)
  File "E:\Programs\Python3.4\lib\site-packages\Crypto\PublicKey\_slowmath.py", line 65, in _encrypt
    return pow(m, self.e, self.n)
TypeError: unsupported operand type(s) for pow(): 'str', 'int', 'int'

这里是示例代码

from Crypto.PublicKey import RSA
from Crypto.Util import randpool

blah = randpool.RandomPool()
RSAKey = RSA.generate(1024, blah.get_bytes)

RSAPubKey = RSAKey.publickey()
print(RSAPubKey.encrypt("Hello.", 32))

使用的操作系统是Windows，请问是什么问题导致的？

Answer 1

该错误表明encrypt 方法不支持加密字符串消息。尝试先使用 encode 将字符串编码为字节，例如:

print(RSAPubKey.encrypt("Hello.".encode('utf-8'), 32))

还值得注意的是，根据文档，encrypt 执行“教科书”RSA 加密，由于缺少填充，这是不安全的。您应该改用 Crypto.Cipher.PKCS1_OAEP 或 Crypto.Cipher.PKCS1_v1_5。