(Ruby) SSH Authentication using X.509 Certificates

See more SSH Examples

Demonstrates how to authenticate with an SSH/SFTP server using an certificate's private key.

Note: See X.509v3 Certificates for SSH Authentication for more information.

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()

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

# Load the cert + private key from a .pfx.
# Note: Chilkat provides methods for loading certs and private keys from many sources, including smart cards and USB tokens (HSM's)
cert = Chilkat::CkCert.new()
success = cert.LoadPfxFile("qa_data/pfx/example.pfx","pfx_password")
if (success != true)
    print cert.lastErrorText() + "\n";
    exit
end

# Get the cert's private key (as PEM) to be used for SSH authentication.
# (The public key is installed on the server.)
privKeyPem = cert.getPrivateKeyPem()
if (cert.get_LastMethodSuccess() == false)
    print cert.lastErrorText() + "\n";
    exit
end

key = Chilkat::CkSshKey.new()

# Load a private key from a PEM string:
success = key.FromOpenSshPrivateKey(privKeyPem)
if (success != true)
    print key.lastErrorText() + "\n";
    exit
end

# Authenticate with the SSH server.
success = ssh.AuthenticatePk("myLogin",key)
if (success != true)
    print ssh.lastErrorText() + "\n";
    exit
end

print "Public-Key Authentication Successful!" + "\n";