PHP

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. Chilkat2 PHP

<?php

use Chilkat2\Asn;
use Chilkat2\Xml;

$asn = new Asn();

// Begin with loading ASN.1 from a binary DER/BER format file.
try {
    $asn->LoadBinaryFile('/Users/chilkat/testData/p7b/test.p7b');

    // Convert ASN.1 to XML:
    $strXml = $asn->AsnToXml();
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}

// The XML returned by AsnToXml will be compact and not pretty-formatted.
// Use Chilkat XML to format the XML better:
$xml = new Xml();
$xml->LoadXml($strXml);
// Assuming success for this example..
// This is formatted better for human viewing:
echo $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:
$asn2 = new Asn();
try {
    $asn2->LoadAsnXml($xml->GetXml());

    // Load the ASN.1 from an encoded string, such as base64:
    $asn3 = new Asn();
    $asn3->LoadEncoded($strBase64, 'base64');
} catch (\Chilkat2\Exception $e) {
    echo $e->getMessage(), "\n";
    exit;
}