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(PHP ActiveX) Combine Timestamp Reply and Content File into a TimeStampData

Demonstrates how to combine a timestamp reply (RFC 3161) with a data file (any type of file) to create a TimeStampData structure (RFC 5544).

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

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

// Also see this example:
// Send a TimeStamp Request to a TimeStamp Authority and get the Response

// Load a timestamp reply file
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData')
$bdTsr = new COM("Chilkat.BinData");
$success = $bdTsr->LoadFile('qa_data/tsd/sample.tsr');
if ($success != 1) {
    print 'Failed to load timestamp reply file.' . "\n";
    exit;
}

// Load the tsr into an ASN.1 object.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Asn')
$asnTsr = new COM("Chilkat.Asn");
$success = $asnTsr->LoadEncoded($bdTsr->getEncoded('base64'),'base64');
if ($success != 1) {
    print $asnTsr->LastErrorText . "\n";
    exit;
}

// Get the timestamp reply as XML.
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml')
$xmlTsr = new COM("Chilkat.Xml");
$xmlTsr->LoadXml($asnTsr->asnToXml());

// The timestamp reply XML begins like this:
// We'll want to remove the 1st "sequence" subtree.

//     <?xml version="1.0" encoding="utf-8"?>
//     <sequence>
//         <sequence>       <---- Remove this sub-tree.
//             <int>00</int>
//             <sequence>
//                 <utf8>Operation Okay</utf8>
//             </sequence>
//         </sequence>
//         <sequence>   
//             <oid>1.2.840.113549.1.7.2</oid>
//             <contextSpecific tag="0" constructed="1">
//             ...

// Remove the 1st sub-tree..
$xmlTsr->RemoveChildByIndex(0);

// In this example, the data file we're combining with the timestamp into a timestampData is a .p7m.
// However, it can be any type of file (text or binary), it doesn't matter..
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.BinData')
$bdContent = new COM("Chilkat.BinData");
$success = $bdContent->LoadFile('qa_data/tsd/sample.p7m');
if ($success != 1) {
    print 'Failed to load content file.' . "\n";
    exit;
}

// Begin building the TimeStampData.  
// We'll build as XML and then convert to ASN.1
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml')
$xml = new COM("Chilkat.Xml");
$xml->Tag = 'sequence';
$xml->UpdateChildContent('oid','1.2.840.113549.1.9.16.1.31');
$xml->UpdateAttrAt('contextSpecific',1,'tag','0');
$xml->UpdateAttrAt('contextSpecific',1,'constructed','1');
$xml->UpdateChildContent('contextSpecific|sequence|int','01');
$xml->UpdateChildContent('contextSpecific|sequence|octets',$bdContent->getEncoded('base64'));
$xml->UpdateAttrAt('contextSpecific|sequence|contextSpecific',1,'tag','0');
$xml->UpdateAttrAt('contextSpecific|sequence|contextSpecific',1,'constructed','1');

// xContext is a Chilkat.Xml
$xContext = $xml->GetChildWithTag('contextSpecific|sequence|contextSpecific');
$xContext->AddChildTree($xmlTsr);

// Convert the XML to ASN.1
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Asn')
$tsd = new COM("Chilkat.Asn");
$tsd->LoadAsnXml($xml->getXml());

// Write the timestamped data to a file.
$success = $tsd->WriteBinaryDer('qa_output/sample.tsd');

// Alternatively, get the tsd ASN.1 as base64..
$tsdBase64 = $tsd->getEncodedDer('base64_mime');
print $tsdBase64 . "\n";

?>

 

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