Chilkat2-Python

Continue SFTP Keyboard-Interactive Authentication

Demonstrates the Chilkat SFtp.ContinueKeyboardAuth method, which submits a response to a keyboard-interactive prompt. The only argument is the response text; for a request with 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 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 it sees success or failure. On success, remember that InitializeSftp still must be called before any file operation.

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Chilkat2-Python

import sys
import chilkat2

success = False

# Demonstrates the SFtp.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.

sftp = chilkat2.SFtp()

# Step 1: Connect the SSH transport.  Port 22 is the usual port.
port = 22
success = sftp.Connect("sftp.example.com",port)
if (success == False):
    print(sftp.LastErrorText)
    sys.exit()

# Begin keyboard-interactive authentication to receive the server's prompt(s).
infoRequestXml = sftp.StartKeyboardAuth("mySshLogin")
if (sftp.LastMethodSuccess == False):
    print(sftp.LastErrorText)
    sys.exit()

# Normally you would not hard-code the password in source.  You should instead obtain it
# from an interactive prompt, environment variable, or a secrets vault.
password = "mySshPassword"

# Submit the response (typically the password).  The returned XML indicates the next prompt or
# the final result.
result = sftp.ContinueKeyboardAuth(password)
if (sftp.LastMethodSuccess == False):
    print(sftp.LastErrorText)
    sys.exit()

print(result)

# On success, initialize the SFTP subsystem.
success = sftp.InitializeSftp()
if (success == False):
    print(sftp.LastErrorText)
    sys.exit()

sftp.Disconnect()