CkPython

Continue SSH Keyboard-Interactive Authentication

Demonstrates the Chilkat Ssh.ContinueKeyboardAuth method, which submits a response to a keyboard-interactive prompt. The only argument is the response text; for a request containing multiple prompts, an XML response is supplied instead. It returns XML indicating the next prompt or the final result.

Background: This is the second half of the keyboard-interactive exchange started by StartKeyboardAuth. A server may issue several rounds of prompts, so a robust client loops: submit answers, read the returned XML, and continue until authentication succeeds or fails. Prompt responses are typically secrets, so obtain them from interactive input rather than embedding them in code.

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import sys
import chilkat

success = False

#  Demonstrates the Ssh.ContinueKeyboardAuth method, which submits a response to a
#  keyboard-interactive prompt.  The only argument is the response.  For multiple prompts, an
#  XML response is supplied instead.

ssh = chilkat.CkSsh()

#  Connect to the SSH server.  Port 22 is the usual SSH port.
sshPort = 22
success = ssh.Connect("ssh.example.com",sshPort)
if (success == False):
    print(ssh.lastErrorText())
    sys.exit()

#  Begin keyboard-interactive authentication to receive the server's prompt(s).
infoRequestXml = ssh.startKeyboardAuth("mySshLogin")
if (ssh.get_LastMethodSuccess() == False):
    print(ssh.lastErrorText())
    sys.exit()

#  Normally you would not hard-code the response (typically the password) in source.  You
#  should instead obtain it from an interactive prompt.
response = "mySshPassword"

#  Submit the response.  The returned XML indicates the next prompt or the final result.
result = ssh.continueKeyboardAuth(response)
if (ssh.get_LastMethodSuccess() == False):
    print(ssh.lastErrorText())
    sys.exit()

print(result)

ssh.Disconnect()