Generate new DSA Key from OpenSSL Parameters File

Generates a new DSA key from an OpenSSL-created parameters file (DER and PEM formats supported). Examples of using OpenSSL to create parameter files are shown here:

openssl dsaparam -outform DER 1024 <  seedData.txt >dsaparam.der

openssl dsaparam 1024 < seedData.txt >dsaparam.pem

Download Chilkat DSA ActiveX

<?php



$dsa = new COM("Chilkat.Dsa");

$success = $dsa->UnlockComponent('Anything for 30-day trial');
if ($success != true) {
    print $dsa->lastErrorText() . "\n";
    exit;
}

$success = $dsa->GenKeyFromParamsDerFile('dsaparam.der');
if ($success != true) {
    print $dsa->lastErrorText() . "\n";
    exit;
}

//  To generate a key from PEM, call GenKeyFromParamsPem
//  (for an in-memory PEM string) or GenKeyFromParamsFilePem
//  for a PEM file.

//  The public and private keys may now be exported to PEM, DER,
//  and XML formatted 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 = true;
//  Save to XML
$xmlStr = $dsa->toXml($bPublicOnly);
$success = $dsa->SaveText($pemStr,'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 = false;
$xmlStr = $dsa->toXml($bPublicOnly);
$success = $dsa->SaveText($pemStr,'dsa_priv.xml');

print 'Finished!' . "\n";
?>