Perl

DSA Generate Key

See more DSA Examples

Generates a DSA public/private key pair and saves to PEM and DER file formats (both encrypted and non-encrypted).

An encrypted DSA PEM looks like this:

-----BEGIN DSA PRIVATE KEY-----
Proc-Type: 4,ENCRYPTED
DEK-Info: DES-EDE3-CBC,9DAFD5C4CD62A5D0

QwDdp66sB0qKXQli7FbVcKL/eo3wu7kGRlV2sI8XbkNa1RTLiwnwTWDB0dqyWRQ8
...
Bx0HVfxKiNgCbL6BQEnYD+GOmMcckuj9Uhgloe/YuXCIDJBGhjUt/li3hvR/PXeC

V2xxNl1XKBE88njqi+UXt4vjGVNLpvXM
-----END DSA PRIVATE KEY-----

Perl

use chilkat();

$success = 0;

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$dsa = chilkat::CkDsa->new();

# Call GenKey to generate a new DSA key.
# The number of bits should be at least 1024 and a multiple
# of 64.   Typical values are either 1024 or 2048.
# DSA key generation is compute intensive and may take
# a short while to complete.
$success = $dsa->GenKey(2048);
if ($success != 1) {
    print $dsa->lastErrorText() . "\r\n";
    exit;
}

# Extract the private and public parts to PEM or DER format
# and save to files...

# First for the public key...
# The public key never needs to be encrypted.

# Save the public key in PEM format:
$pemStr = $dsa->toPublicPem();
# This example will not check the return value of SaveText...
$success = $dsa->SaveText($pemStr,"dsa_pub.pem");

# Save the public key in DER format:
$success = $dsa->ToPublicDerFile("dsa_pub.der");

$bPublicOnly = 1;
# Save to XML
$xmlStr = $dsa->toXml($bPublicOnly);
$success = $dsa->SaveText($xmlStr,"dsa_pub.xml");

# ------------------------------------
# Now for the private key....
# ------------------------------------

# Unencrypted PEM:
$pemStr = $dsa->toPem();
$success = $dsa->SaveText($pemStr,"dsa_priv.pem");

# Encrypted PEM:
$pemStr = $dsa->toEncryptedPem("myPassword");
$success = $dsa->SaveText($pemStr,"dsa_privEncrypted.pem");

# DER:
$success = $dsa->ToDerFile("dsa_priv.der");

# XML:
$bPublicOnly = 0;
$xmlStr = $dsa->toXml($bPublicOnly);
$success = $dsa->SaveText($xmlStr,"dsa_priv.xml");

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