crypto.py 文件源码

def getPublicKey(self):
        """
        Gets a public key.

        Return value:
        str; the public key data.

        Exceptions:
        Exception: getting the key failed
        """

        if not self.hasPublicKey:
            raise Exception("Public key unknown")

        size = libssl.i2o_ECPublicKey(self.keyData, None)
        if not size:
            raise Exception("i2o_ECPublicKey failed")

        b = ctypes.create_string_buffer(size)
        if libssl.i2o_ECPublicKey(self.keyData, ctypes.byref(ctypes.pointer(b))) != size:
            raise Exception("i2o_ECPublicKey returned unexpected size")

        return ''.join(c for c in b)