CkPython

Start SSH Keyboard-Interactive Authentication

Demonstrates the Chilkat Ssh.StartKeyboardAuth method, which begins keyboard-interactive authentication. The only argument is the login name. It returns XML describing the server's prompts and whether each response should be echoed. Answer the prompts with ContinueKeyboardAuth.

Background: Keyboard-interactive is the flexible, prompt-driven SSH method — the server sends one or more questions (a password, a one-time code, a security question) and the client answers each. It is how SSH supports two-factor and other challenge-response schemes. The returned XML tells you exactly what to ask the user and whether to mask their input.

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import sys
import chilkat

success = False

#  Demonstrates the Ssh.StartKeyboardAuth method, which begins keyboard-interactive
#  authentication.  The only argument is the login name.  It returns XML describing the server's
#  prompts and whether each response should be echoed.

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.  The returned XML describes the prompts.
infoRequestXml = ssh.startKeyboardAuth("mySshLogin")
if (ssh.get_LastMethodSuccess() == False):
    print(ssh.lastErrorText())
    sys.exit()

print(infoRequestXml)

#  Answer the prompt(s) with ContinueKeyboardAuth.

ssh.Disconnect()