(PHP ActiveX) Convert ASN.1 to/from Binary DER, XML, and Base64

Demonstrates how to convert ASN.1 from and to any of the following formats: binary DER, Base64, and XML.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows Note: The php_com_dotnet.dll may need to be enabled inside of php.ini.

<?php

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Asn')
$asn = new COM("Chilkat.Asn");

// Begin with loading ASN.1 from a binary DER/BER format file.
$success = $asn->LoadBinaryFile('/Users/chilkat/testData/p7b/test.p7b');
if ($success != 1) {
    print $asn->LastErrorText . "\n";
    exit;
}

// Convert ASN.1 to XML:
$strXml = $asn->asnToXml();
if ($asn->LastMethodSuccess != 1) {
    print $asn->LastErrorText . "\n";
    exit;
}

// The XML returned by AsnToXml will be compact and not pretty-formatted.
// Use Chilkat XML to format the XML better:
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml')
$xml = new COM("Chilkat.Xml");
$success = $xml->LoadXml($strXml);
// Assuming success for this example..
// This is formatted better for human viewing:
print $xml->getXml() . "\n";

// Now get the ASN.1 in base64 format.  Any encoding supported
// by Chilkat can be passed, such as "hex", "uu", "quoted-printable", "base32", "modbase64", etc.
$strBase64 = $asn->getEncodedDer('base64');

// Load the ASN.1 from XML:
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Asn')
$asn2 = new COM("Chilkat.Asn");
$success = $asn2->LoadAsnXml($xml->getXml());
if ($success != 1) {
    print $asn2->LastErrorText . "\n";
    exit;
}

// Load the ASN.1 from an encoded string, such as base64:
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Asn')
$asn3 = new COM("Chilkat.Asn");
$success = $asn3->LoadEncoded($strBase64,'base64');
if ($success != 1) {
    print $asn3->LastErrorText . "\n";
    exit;
}


?>