Lua

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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Lua

local chilkat = require("chilkat")

-- 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.

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.  The returned XML describes the prompts.
local infoRequestXml = ssh:start_keyboard_auth("mySshLogin")
if not ssh.last_method_success then
    print(ssh.last_error_text)
    return
end

print(infoRequestXml)

-- Answer the prompt(s) with ContinueKeyboardAuth.

ssh:disconnect()