使用 Paramiko 进行多因素身份验证（密码和密钥）

Question

我有以下代码：

import paramiko
policy = paramiko.client.WarningPolicy()
client = paramiko.client.SSHClient()
client.set_missing_host_key_policy(policy)
username = '...'
password = '...'
file_path = '...'
pkey = paramiko.RSAKey.from_private_key_file(file_path)
client.connect('...', username=username, password=password, pkey=key)
sftp = client.open_sftp() 

从文档来看，它似乎应该可以工作。一切正常，但是当代码命中client.open_sftp它时，它会用 a 炸弹，SSHException: Unable to open channel.并且传输（from client.get_transport）处于活动状态但未经过身份验证。我也无法为此启用调试日志记录（我正在尝试logging.getLogger('paramiko').setLevel(logging.DEBUG)但没有成功。）

关于我可以从哪里开始调试这个非常模糊的错误消息的任何想法？

Answer 1

抱歉回复晚了，但这个问题真的很难找到任何信息，所以我想为其他陷入这个问题的人发布一个解决方案。

在试图解决这个问题之后，我找到了一个解决方案，这要归功于 Doug Ellwanger 和 Daniel Brownridge 发布的一些代码。问题似乎是由使用更多交互风格处理多因素身份验证的方式引起的。

import paramiko
import threading

... 

username = '...'
password = '...'
file_path = '...'
pkey = paramiko.RSAKey.from_private_key_file(file_path)
sftpClient = multifactor_auth('...', 22, username, pkey, password)

...

def multifactor_auth_sftp_client(host, port, username, key, password):
    #Create an SSH transport configured to the host
    transport = paramiko.Transport((host, port))
    #Negotiate an SSH2 session
    transport.connect()
    #Attempt authenticating using a private key
    transport.auth_publickey(username, key)
    #Create an event for password auth
    password_auth_event = threading.Event()
    #Create password auth handler from transport
    password_auth_handler = paramiko.auth_handler.AuthHandler(transport)
    #Set transport auth_handler to password handler
    transport.auth_handler = password_auth_handler
    #Aquire lock on transport
    transport.lock.acquire()
    #Register the password auth event with handler
    password_auth_handler.auth_event = password_auth_event
    #Set the auth handler method to 'password'
    password_auth_handler.auth_method = 'password'
    #Set auth handler username
    password_auth_handler.username = username
    #Set auth handler password
    password_auth_handler.password = password
    #Create an SSH user auth message
    userauth_message = paramiko.message.Message()
    userauth_message.add_string('ssh-userauth')
    userauth_message.rewind()
    #Make the password auth attempt
    password_auth_handler._parse_service_accept(userauth_message)
    #Release lock on transport
    transport.lock.release()
    #Wait for password auth response
    password_auth_handler.wait_for_response(password_auth_event)
    #Create an open SFTP client channel
    return transport.open_sftp_client()

我希望这会有所帮助，它适用于我的项目。