(Ruby) SSH Keyboard Authentication

Demonstrates how to implement keyboard authentication with an SSH server.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

ssh = Chilkat::CkSsh.new()

# Set some timeouts, in milliseconds:
ssh.put_ConnectTimeoutMs(5000)
ssh.put_IdleTimeoutMs(15000)

# Connect to the SSH server.  
# The standard SSH port = 22
# The hostname may be a hostname or IP address.
hostname = "sftp.example.com"
port = 22
success = ssh.Connect(hostname,port)
if (success != true)
    print ssh.lastErrorText() + "\n";
    exit
end

# Begin keyboard authentication..
xmlResponse = ssh.startKeyboardAuth("myLogin")
if (ssh.get_LastMethodSuccess() != true)
    print ssh.lastErrorText() + "\n";
    exit
end

# If a user authentication banner was received, then your app
# may display it prior to prompting for the password.
print "UserAuthBanner: " + ssh.userAuthBanner() + "\n";

xml = Chilkat::CkXml.new()

success = xml.LoadXml(xmlResponse)
# Assume LoadXml succeeds for the example..
if (xml.HasChildWithTag("success") == true)
    print "No password required, already authenticated." + "\n";
    exit
end

if (xml.HasChildWithTag("error") == true)
    print "Authentication already failed." + "\n";
    exit
end

# See the online reference documentation for Chilkat SSH.
# The XML returned by StartKeyboardAuth will contain an infoRequest
# with one or more prompts that your application may choose to display.

# Call ContinueKeyboardAuth, passing in the whatever information is requires (such as the password).
# Typically, keyboard authentication requires one call to ContinueKeyboardAuth 
# using the password.  Theoretically, the SSH server could prompt for additional pieces
# of information.  The authentication is completed when the XML returned contains
# either a "success" or "error" child node.

# This example asumes only one call to ContinueKeyboardAuth is required.
xmlResponse = ssh.continueKeyboardAuth("myPassword")
if (ssh.get_LastMethodSuccess() != true)
    print ssh.lastErrorText() + "\n";
    exit
end

success = xml.LoadXml(xmlResponse)
# Assume LoadXml succeeds for the example..
if (xml.HasChildWithTag("success") == true)
    print "SSH Keyboard Authentication Successful!" + "\n";
    exit
end

if (xml.HasChildWithTag("error") == true)
    print "Authentication failed." + "\n";
    exit
end