(PHP using ActiveX) Convert DSA PEM Private Key to DER

Converts a DSA private key from PEM format to DER. The first part of the example will convert an unencrypted PEM to DER, then 2nd part will convert an encrypted PEM to unencrypted DER.

Download Chilkat DSA ActiveX

<?php



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

$success = $dsa->UnlockComponent('Anything for 30-day trial');
if ($success != 1) {
    print $dsa->lastErrorText() . "\n";
    exit;
}

//  Load a PEM private key.

$pemPrivateKey = $dsa->loadText('dsa_priv.pem');
//  Import the unencrypted PEM into the DSA object.
$success = $dsa->FromPem($pemPrivateKey);
if ($success != 1) {
    print $dsa->lastErrorText() . "\n";
    exit;
}

//  Write it out as a DER file:
$success = $dsa->ToDerFile('dsa_priv.der');
if ($success != 1) {
    print $dsa->lastErrorText() . "\n";
    exit;
}

//  Load an encrypted PEM private key.
$pemPrivateKey = $dsa->loadText('dsa_privEncrypted.pem');
//  Import the encrypted PEM into the DSA object.
$success = $dsa->FromEncryptedPem('myPassword',$pemPrivateKey);
if ($success != 1) {
    print $dsa->lastErrorText() . "\n";
    exit;
}

//  Write it out as an unencrypted DER file:
$success = $dsa->ToDerFile('dsa_priv2.der');
if ($success != 1) {
    print $dsa->lastErrorText() . "\n";
    exit;
}

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