PyCrypto RSA和Pickle

Question

我正在使用pyCrpyto的RSA类：

from Crypto.Cipher import PKCS1_v1_5
from Crypto.PublicKey import RSA

message = 'To be encrypted'
key = RSA.generate(2048)
cipher = PKCS1_v1_5.new(key)
ciphertext = cipher.encrypt(message)

代码运行得很好，我可以解密密文了。但是，我需要能够序列化这些密码。我没有遇到任何问题pickle-ing其他pyCrypto密码，如AES，但当我尝试pickle一个RSA密码时，我遇到了以下错误：

from Crypto.Cipher import PKCS1_v1_5
from Crypto.PublicKey import RSA
import pickle

message = 'To be encrypted'
key = RSA.generate(2048)
cipher = PKCS1_v1_5.new(key)

pickle.dump(cipher, open("cipher.temp", "wb"))
cipher = pickle.load(open("cipher.temp", "rb"))
ciphertext = cipher.encrypt(message)

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Crypto/Cipher/PKCS1_v1_5.py", line 119, in encrypt
randFunc = self._key._randfunc
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/Crypto/PublicKey/RSA.py", line 126, in __getattr__
  raise AttributeError("%s object has no %r attribute" % (self.__class__.__name__, attrname,))
  AttributeError: _RSAobj object has no '_randfunc' attribute

我能做些什么来解决这个问题--另一个序列化框架，RSA对象的不同构造方法，等等，或者这只是一个非pickle的-able对象？

Answer 1

酸洗对于公钥组件工作得很好，但是当涉及到整个密钥时，_randfunc不能幸免于酸洗。在处理项目时，我也遇到过同样的错误。你可以在这里找到更多信息：https://github.com/google/oauth2client/issues/638

使用PyCrypto的importKey和exportKey函数，其文档可以在这里找到：https://www.dlitz.net/software/pycrypto/api/2.6/