Perl

Generate DSA SSH Key

See more SSH Key Examples

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

use chilkat();

$success = 0;

$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 != 1) {
    print "Invalid numBits passed to DSA key generation method." . "\r\n";
    exit;
}

# 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 = 0;
$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 = 1;
$exportedKey = $key->toOpenSshPrivateKey($exportEncrypted);
$success = $key->SaveText($exportedKey,"privkey_openssh_encrypted.pem");

# Export the DSA private key to unencrypted PuTTY format:
$exportEncrypted = 0;
$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 = 1;
$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");

print "Finished." . "\r\n";