Generate DSA SSH Key

Generates a DSA SSH key and saves to various public and private key file formats (OpenSSH and PuTTY).

Download Chilkat Ruby Library

require 'chilkat'

key = Chilkat::CkSshKey.new()

#  numBits should be a minimum of 1024 and
#  a multiple of 64.  Typical values are
#  1024 or 2048.
numBits = 2048
success = key.GenerateDsaKey(numBits)
if (success != true)
    print "Invalid numBits passed to DSA key generation method." + "\n";
    exit
end

#  Note: Generating a public/private key pair is CPU intensive
#  and may take a short amount of time (more than few seconds,
#  but less than a minute).

#  Export the DSA private key to OpenSSH, PuTTY, and XML and save.
exportEncrypted = false
exportedKey = key.toOpenSshPrivateKey(exportEncrypted)
#  Chilkat provides a SaveText method for convenience...
success = key.SaveText(exportedKey,"privkey_openssh_unencrypted.pem")

#  Export with encryption to OpenSSH private key format:
key.put_Password("secret")
exportEncrypted = true
exportedKey = key.toOpenSshPrivateKey(exportEncrypted)
success = key.SaveText(exportedKey,"privkey_openssh_encrypted.pem")

#  Export the DSA private key to unencrypted PuTTY format:
exportEncrypted = false
exportedKey = key.toPuttyPrivateKey(exportEncrypted)
success = key.SaveText(exportedKey,"privkey_putty_unencrypted.ppk")

#  Export the DSA private key to encrypted PuTTY format:
key.put_Password("secret")
exportEncrypted = true
exportedKey = key.toPuttyPrivateKey(exportEncrypted)
success = key.SaveText(exportedKey,"privkey_putty_encrypted.ppk")

#  Export private key to XML:
exportedKey = key.toXml()
success = key.SaveText(exportedKey,"privkey.xml")

#  ----------------------------------------------------
#  Now for the public key....
#  ----------------------------------------------------

#  The Secure Shell (SSH) Public Key File Format
#  is documented in RFC 4716.
exportedKey = key.toRfc4716PublicKey()
success = key.SaveText(exportedKey,"pubkey_rfc4716.pub")

#  OpenSSH has a separate public-key file format, which
#  is also supported by Chilkat SshKey:
exportedKey = key.toOpenSshPublicKey()
success = key.SaveText(exportedKey,"pubkey_openSsh.pub")