(Ruby) SSH Public Key Authentication

Demonstrates how to authenticate with an SSH server using public key authentication.

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

key = Chilkat::CkSshKey.new()

# Read the PEM file into a string variable:
# (This does not load the PEM file into the key.  The LoadText
# method is a convenience method for loading the full contents of ANY text
# file into a string variable.)
privKey = key.loadText("myPrivateKey.pem")
if (key.get_LastMethodSuccess() != true)
    print key.lastErrorText() + "\n";
    exit
end

# Load a private key from a PEM string:
# (Private keys may be loaded from OpenSSH and Putty formats.
# Both encrypted and unencrypted private key file formats
# are supported.  This example loads an unencrypted private
# key in OpenSSH format.  PuTTY keys typically use the .ppk
# file extension, while OpenSSH keys use the PEM format.
# (For PuTTY keys, call FromPuttyPrivateKey instead.)
success = key.FromOpenSshPrivateKey(privKey)
if (success != true)
    print key.lastErrorText() + "\n";
    exit
end

# Authenticate with the SSH server using the login and
# private key.  (The corresponding public key should've 
# been installed on the SSH server beforehand.)
success = ssh.AuthenticatePk("myLogin",key)
if (success != true)
    print ssh.lastErrorText() + "\n";
    exit
end

print ssh.lastErrorText() + "\n";
print "Public-Key Authentication Successful!" + "\n";