(PHP Extension) 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

Chilkat PHP Downloads PHP Extension for Windows, Linux, MacOS, Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

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

$dsa = new CkDsa();

$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";

?>