Lua

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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Lua

local chilkat = require("chilkat")

-- 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.

local ssh = chilkat.Ssh.new()

-- Connect to the SSH server.  Port 22 is the usual SSH port.
local sshPort = 22
local success = ssh:connect("ssh.example.com", sshPort)
if not success then
    print(ssh.last_error_text)
    return
end

-- Begin keyboard-interactive authentication to receive the server's prompt(s).
local infoRequestXml = ssh:start_keyboard_auth("mySshLogin")
if not ssh.last_method_success then
    print(ssh.last_error_text)
    return
end

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

-- Submit the response.  The returned XML indicates the next prompt or the final result.
local result = ssh:continue_keyboard_auth(response)
if not ssh.last_method_success then
    print(ssh.last_error_text)
    return
end

print(result)

ssh:disconnect()