(Perl) Generate an RSA Key and Get as Base64 DER

Demonstrates how to generate a 2048-bit RSA key and return the public and private parts as unencrypted Base64 encoded DER.

Chilkat Perl Downloads Perl Module for Windows, MacOS, Linux, Alpine Linux, Solaris

use chilkat();

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

$rsa = chilkat::CkRsa->new();

# Generate a 2048-bit key.  Chilkat RSA supports
$success = $rsa->GenerateKey(2048);
if ($success != 1) {
    print $rsa->lastErrorText() . "\r\n";
    exit;
}

# Get the public part of the key.
# pubKey is a PublicKey
$pubKey = $rsa->ExportPublicKeyObj();

# There are two possible formats for representing the RSA public key 
# in ASN.1 (DER).  The possible formats are PKCS1 and PKCS8.
# We can get either by setting bChoosePkcs1 to 1 or 0.
$bChoosePkcs1 = 1;
$pubKeyBase64Der = $pubKey->getEncoded($bChoosePkcs1,"base64");
print "Public Key Base64 DER:" . "\r\n";
print $pubKeyBase64Der . "\r\n";

# Now get the private key as Base64 DER:
# Get the private part of the key.
# (Note: A public key is actually just a subset of the private key.  
#  If you have the private key, you also have the public key.
#  Thus Chilkat provides a method to get the public key from the private key.)
# privKey is a PrivateKey
$privKey = $rsa->ExportPrivateKeyObj();

# Again, we can get PKCS1 or PKCS8, but with different methods:
$privKeyPkcs1 = $privKey->getPkcs1ENC("base64");
print "Private Key PKCS1 Base64 DER:" . "\r\n";
print $privKeyPkcs1 . "\r\n";

$privKeyPkcs8 = $privKey->getPkcs8ENC("base64");
print "Private Key PKCS8 Base64 DER:" . "\r\n";
print $privKeyPkcs8 . "\r\n";