Ruby

SSH Public Key Authentication

See more SSH Examples

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

require 'chilkat'

success = false

# 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";