def decrypt(self, token, signature=None):
binary = rsa.decrypt(token, self.my_privkey)<EOL>if signature:<EOL><INDENT>rsa.verify(binary, signature, self.his_pubkey)<EOL><DEDENT>return binary<EOL>
Decrypt binary data.

**中文文档**

- 接收消息时只需要自己的privkey
- 如需使用签名, 则双方都需要持有对方的pubkey