正在打印/导出AppEngine PyCrypto上的公钥

Question

Google AppEngine当前使用旧版本的PyCrypto。

在制作了RSAkey之后，我找不到任何方法来导出公钥。

遗憾的是，pycrypto 2.01的文档目前为404。我在当前代码中看到的.export方法在PyCrypto 2.01:上不起作用

制作密钥对：

rsa_key = RSA.generate(384, random_generator) 

可用的检查方法：

In [84]: rsa_key.publickey. <tab>
RSAkey.publickey.__call__          RSAkey.publickey.__func__          RSAkey.publickey.__reduce__        RSAkey.publickey.__str__
RSAkey.publickey.__class__         RSAkey.publickey.__get__           RSAkey.publickey.__reduce_ex__     RSAkey.publickey.__subclasshook__
RSAkey.publickey.__cmp__           RSAkey.publickey.__getattribute__  RSAkey.publickey.__repr__          RSAkey.publickey.im_class
RSAkey.publickey.__delattr__       RSAkey.publickey.__hash__          RSAkey.publickey.__self__          RSAkey.publickey.im_func
RSAkey.publickey.__doc__           RSAkey.publickey.__init__          RSAkey.publickey.__setattr__       RSAkey.publickey.im_self
RSAkey.publickey.__format__        RSAkey.publickey.__new__           RSAkey.publickey.__sizeof__        

打印不起作用。

Answer 1

如果互操作性对您来说不那么重要，那么应该可以使用pickle模块。

import pickle
keyout = pickle.dumps(rsa_key)
# Save keyout into a file or a db
[ ... ]
# Retrieve keyin from the same file or db
rsa_key = pickle.loads(keyin)

Answer 2

只需查看代码即可看到：

def generate(bits, randfunc, progress_func=None):
    """generate(bits:int, randfunc:callable, progress_func:callable)
    Generate an RSA key of length 'bits', using 'randfunc' to get
    random data and 'progress_func', if present, to display
    the progress of the key generation.
    """
    obj=RSAobj()
    # Generate random number from 0 to 7
    difference=ord(randfunc(1)) & 7
    # Generate the prime factors of n
    if progress_func: progress_func('pn')
    obj.p=pubkey.getPrime(bits/2, randfunc)
    if progress_func: progress_func('qn')
    obj.q=pubkey.getPrime((bits/2)+difference, randfunc)
    obj.n=obj.p*obj.q
    # Generate encryption exponent
    if progress_func: progress_func('en')
    obj.e=pubkey.getPrime(17, randfunc)
    if progress_func: progress_func('dn')
    obj.d=pubkey.inverse(obj.e, (obj.p-1)*(obj.q-1))
    return obj

这个网站对每个变量的含义都有很好的解释。