SSH Public Key Authentication

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

Downloads for Windows/Linux and Install Instructions

require 'chilkat'

#  Important: It is helpful to send the contents of the
#  sftp.LastErrorText property when sending email
#  to support@chilkatsoft.com

ssh = Chilkat::CkSsh.new()

#  Any string automatically begins a fully-functional 30-day trial.
success = ssh.UnlockComponent("Anything for 30-day trial")
if (success != true)
    print ssh.lastErrorText() + "\n";
    exit
end

#  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 = "www.my-ssh-server.com"
port = 22
success = ssh.Connect(hostname,port)
if (success != true)
    print ssh.lastErrorText() + "\n";
    exit
end

key = Chilkat::CkSshKey.new()

#  Load a private key from a PEM file:
#  (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.
privKey = key.loadText("myPrivateKey.pem")
if (privKey == nil )
    print key.lastErrorText() + "\n";
    exit
end

#  (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"