Python/paramiko CryptographyDeprecationWarning

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pip uninstall cryptography==2.5

---

import paramiko
client = paramiko.SSHClient()
client.connect(serverIp, port=serverPort, username=serverUser)

尝试使用paramiko.MissingHostKeyPolicy类：

class Accept(paramiko.MissingHostKeyPolicy):
    def missing_host_key(self, client, hostname, key):
        return

Client.set_missing_host_key_policy(Accept())

警告如下：

paramiko\ecdsakey.py:164: CryptographyDeprecationWarning: Support for unsafe construction of public numbers from encoded data will be removed in a future version. Please use EllipticCurvePublicKey.from_encoded_point
  self.ecdsa_curve.curve_class(), pointinfo
paramiko\kex_ecdh_nist.py:39: CryptographyDeprecationWarning: encode_point has been deprecated on EllipticCurvePublicNumbers and will be removed in a future version. Please use EllipticCurvePublicKey.public_bytes to obtain both compressed and uncompressed point encoding.
  m.add_string(self.Q_C.public_numbers().encode_point())
paramiko\kex_ecdh_nist.py:96: CryptographyDeprecationWarning: Support for unsafe construction of public numbers from encoded data will be removed in a future version. Please use EllipticCurvePublicKey.from_encoded_point
  self.curve, Q_S_bytes
paramiko\kex_ecdh_nist.py:111: CryptographyDeprecationWarning: encode_point has been deprecated on EllipticCurvePublicNumbers and will be removed in a future version. Please use EllipticCurvePublicKey.public_bytes to obtain both compressed and uncompressed point encoding.
  hm.add_string(self.Q_C.public_numbers().encode_point())

问题：
paramiko 2.4.2 依赖 cryptography，而最新的cryptography2.5里有一些弃用的API

解决：

pip uninstall cryptography==2.5
pip install cryptography==2.4.2