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(PHP Extension) XAdES using TSA Requiring Client Certificate

See more XML Digital Signatures Examples

Demonstrates how to create an XMLDSig (XAdES) signed document which includes an EncapsulatedTimestamp using a TSA (TimeStamp Authority) server requiring client certificate authentication. One such TSA is https://www3.postsignum.cz/TSS/TSS_crt/

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.

$success = true;

// Load the XML to be signed.  For example, the XML to be signed might contain something like this:

// <?xml version="1.0" encoding="utf-8"?>
// <TransakcniLogSystemu xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://nsess.public.cz/erms_trans/v_01_01" Id="Signature1">
//   <TransLogInfo>
//     <Identifikator>XYZ ABC</Identifikator>
//     <DatumVzniku>2022-12-20T14:39:02.3625922+01:00</DatumVzniku>
//     <DatumCasOd>2022-12-20T14:26:26.88</DatumCasOd>
//     <DatumCasDo>2022-12-20T14:39:02.287</DatumCasDo>
//     <Software>XYZ</Software>
//     <VerzeSoftware>2.0.19.32</VerzeSoftware>
//   </TransLogInfo>
//   <Udalosti>
//     <Udalost>
//       <Poradi>1</Poradi>
// ...

// Load the XML to be signed from a file.
// (XML can be loaded from other source, such as a string variable.)
$sbXml = new CkStringBuilder();
$success = $sbXml->LoadFile('xmlToSign.xml','utf-8');

$gen = new CkXmlDSigGen();

$gen->put_SigLocation('TransakcniLogSystemu');
$gen->put_SigLocationMod(0);
$gen->put_SigId('SignatureID-Signature1');
$gen->put_SigNamespacePrefix('ds');
$gen->put_SigNamespaceUri('http://www.w3.org/2000/09/xmldsig#');
$gen->put_SignedInfoCanonAlg('C14N');
$gen->put_SignedInfoDigestMethod('sha256');

// Set the KeyInfoId before adding references..
$gen->put_KeyInfoId('KeyInfoId-Signature-Signature1');

// Create an Object to be added to the Signature.

// Note: Chilkat will automatically fill in the values marked as "TO BE GENERATED BY CHILKAT" at the time of signing.
// The EncapsulatedTimestamp will be automatically generated.

$object1 = new CkXml();
$object1->put_Tag('xades:QualifyingProperties');
$object1->AddAttribute('Target','#Signature1');

$object1->UpdateAttrAt('xades:SignedProperties',true,'Id','SignedProperties-Signature-Signature1');
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime','TO BE GENERATED BY CHILKAT');
$object1->UpdateAttrAt('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestMethod',true,'Algorithm','http://www.w3.org/2001/04/xmlenc#sha256');
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestValue','TO BE GENERATED BY CHILKAT');
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509IssuerName','TO BE GENERATED BY CHILKAT');
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509SerialNumber','TO BE GENERATED BY CHILKAT');

// The EncapsulatedTimestamp will be included in the unsigned properties.
$object1->UpdateAttrAt('xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp',true,'Id','signature-timestamp-5561-8212-3316-5191');
$object1->UpdateAttrAt('xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp|ds:CanonicalizationMethod',true,'Algorithm','http://www.w3.org/2001/10/xml-exc-c14n#');
$object1->UpdateAttrAt('xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp|xades:EncapsulatedTimeStamp',true,'Encoding','http://uri.etsi.org/01903/v1.2.2#DER');
$object1->UpdateChildContent('xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp|xades:EncapsulatedTimeStamp','TO BE GENERATED BY CHILKAT');

$gen->AddObject('XadesObjectId-Signature1',$object1->getXml(),'','');

// -------- Reference 1 --------
$gen->AddObjectRef('SignedProperties-Signature-Signature1','sha256','EXCL_C14N','','http://uri.etsi.org/01903#SignedProperties');

// -------- Reference 2 --------
$gen->AddSameDocRef('KeyInfoId-Signature-Signature1','sha256','EXCL_C14N','','');
$gen->SetRefIdAttr('KeyInfoId-Signature-Signature1','ReferenceKeyInfo');

// -------- Reference 3 --------
$gen->AddSameDocRef('','sha256','EXCL_C14N','','');
$gen->SetRefIdAttr('','Reference-Signature1');

// Provide a certificate + private key. (PFX password is test123)
$cert = new CkCert();
$success = $cert->LoadPfxFile('qa_data/pfx/cert_test123.pfx','test123');
if ($success != true) {
    print $cert->lastErrorText() . "\n";
    exit;
}

$gen->SetX509Cert($cert,true);

$gen->put_KeyInfoType('X509Data');
$gen->put_X509Type('Certificate');

$gen->put_Behaviors('IndentedSignature');

// -------------------------------------------------------------------------------------------
// To have the EncapsulatedTimeStamp automatically added... 
// 1) Add the <xades:EncapsulatedTimeStamp Encoding="http://uri.etsi.org/01903/v1.2.2#DER">TO BE GENERATED BY CHILKAT</xades:EncapsulatedTimeStamp>
//    to the unsigned properties.  (This was accomplished in the above code.)
// 2) Specify the TSA URL (Timestamping Authority URL).
//    Here we specify the TSA URL:
// -------------------------------------------------------------------------------------------

$jsonTsa = new CkJsonObject();
$jsonTsa->UpdateString('timestampToken.tsaUrl','https://www3.postsignum.cz/TSS/TSS_crt/');
$jsonTsa->UpdateBool('timestampToken.requestTsaCert',true);
$gen->SetTsa($jsonTsa);

// -------------------------------------------------------------------------------------------
// In this case, the TSA requires client certificate authentication.
// To provide your client certificate, the application will instantiate a Chilkat HTTP object,
// then set it up with a SSL/TLS client certificate, and then tell the XmlDSigGen object
// to use the HTTP object for connections to the TSA server.
// -------------------------------------------------------------------------------------------
$http = new CkHttp();
$success = $http->SetSslClientCertPfx('/home/bob/pfxFiles/myClientSideCertWithPrivateKey.pfx','pfxPassword');
if ($success != true) {
    print $http->lastErrorText() . "\n";
    exit;
}

// Tell the XmlDSigGen object to use the above HTTP object for TSA communications.
$gen->SetHttpObj($http);

// Sign the XML...
$success = $gen->CreateXmlDSigSb($sbXml);
if ($success != true) {
    print $gen->lastErrorText() . "\n";
    exit;
}

// -----------------------------------------------

// Save the signed XML to a file.
$success = $sbXml->WriteFile('c:/temp/qa_output/signedXml.xml','utf-8',false);

print $sbXml->getAsString() . "\n";

?>

 

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