(PHP ActiveX) XML-DSig Add Object Reference with Transforms Specified Explicitly

Demonstrates how to use the new AddObjectRef2 method to explicitly specify the XML Transforms fragment.

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.

$success = 1;

// Build the following XML to be signed:

// <?xml version="1.0" encoding="utf-8"?>
// <InitUpload xmlns="http://e-dokumenty.mf.gov.pl">
//     <DocumentType>JPK</DocumentType>
//     <Version>01.02.01.20160617</Version>
//     <EncryptionKey algorithm="RSA" encoding="Base64" mode="ECB" padding="PKCS#1">xxxx</EncryptionKey>
//     <DocumentList>
//         <Document>
//             <FormCode schemaVersion="1-1" systemCode="JPK_VAT (3)">JPK_VAT</FormCode>
//             <FileName>JPK_VAT_3_v1-1_20181201.xml</FileName>
//             <ContentLength>8736</ContentLength>
//             <HashValue algorithm="SHA-256" encoding="Base64">JEDI1pItwh6dj/Xx1uts/x61qnjZ4DLHpkZMhmf1oKQ=</HashValue>
//             <FileSignatureList filesNumber="1">
//                 <Packaging>
//                     <SplitZip mode="zip" type="split"/>
//                 </Packaging>
//                 <Encryption>
//                     <AES block="16" mode="CBC" padding="PKCS#7" size="256">
//                         <IV bytes="16" encoding="Base64">z64oN9zXHt1+S3XACRSCYw==</IV>
//                     </AES>
//                 </Encryption>
//                 <FileSignature>
//                     <OrdinalNumber>1</OrdinalNumber>
//                     <FileName>JPK_VAT_3_v1-1_20181201-000.xml.zip.aes</FileName>
//                     <ContentLength>16</ContentLength>
//                     <HashValue algorithm="MD5" encoding="Base64">5MX0q1935fvMjLFV7E1yDw==</HashValue>
//                 </FileSignature>
//             </FileSignatureList>
//         </Document>
//     </DocumentList>
// </InitUpload>

// Use this online tool to generate code from sample XML: 
// Generate Code to Create XML

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml')
$xmlToSign = new COM("Chilkat.Xml");
$xmlToSign->Tag = 'InitUpload';
$xmlToSign->AddAttribute('xmlns','http://e-dokumenty.mf.gov.pl');
$xmlToSign->UpdateChildContent('DocumentType','JPK');
$xmlToSign->UpdateChildContent('Version','01.02.01.20160617');
$xmlToSign->UpdateAttrAt('EncryptionKey',1,'algorithm','RSA');
$xmlToSign->UpdateAttrAt('EncryptionKey',1,'encoding','Base64');
$xmlToSign->UpdateAttrAt('EncryptionKey',1,'mode','ECB');
$xmlToSign->UpdateAttrAt('EncryptionKey',1,'padding','PKCS#1');
$xmlToSign->UpdateChildContent('EncryptionKey','xxxx');
$xmlToSign->UpdateAttrAt('DocumentList|Document|FormCode',1,'schemaVersion','1-1');
$xmlToSign->UpdateAttrAt('DocumentList|Document|FormCode',1,'systemCode','JPK_VAT (3)');
$xmlToSign->UpdateChildContent('DocumentList|Document|FormCode','JPK_VAT');
$xmlToSign->UpdateChildContent('DocumentList|Document|FileName','JPK_VAT_3_v1-1_20181201.xml');
$xmlToSign->UpdateChildContent('DocumentList|Document|ContentLength','8736');
$xmlToSign->UpdateAttrAt('DocumentList|Document|HashValue',1,'algorithm','SHA-256');
$xmlToSign->UpdateAttrAt('DocumentList|Document|HashValue',1,'encoding','Base64');
$xmlToSign->UpdateChildContent('DocumentList|Document|HashValue','JEDI1pItwh6dj/Xx1uts/x61qnjZ4DLHpkZMhmf1oKQ=');
$xmlToSign->UpdateAttrAt('DocumentList|Document|FileSignatureList',1,'filesNumber','1');
$xmlToSign->UpdateAttrAt('DocumentList|Document|FileSignatureList|Packaging|SplitZip',1,'mode','zip');
$xmlToSign->UpdateAttrAt('DocumentList|Document|FileSignatureList|Packaging|SplitZip',1,'type','split');
$xmlToSign->UpdateAttrAt('DocumentList|Document|FileSignatureList|Encryption|AES',1,'block','16');
$xmlToSign->UpdateAttrAt('DocumentList|Document|FileSignatureList|Encryption|AES',1,'mode','CBC');
$xmlToSign->UpdateAttrAt('DocumentList|Document|FileSignatureList|Encryption|AES',1,'padding','PKCS#7');
$xmlToSign->UpdateAttrAt('DocumentList|Document|FileSignatureList|Encryption|AES',1,'size','256');
$xmlToSign->UpdateAttrAt('DocumentList|Document|FileSignatureList|Encryption|AES|IV',1,'bytes','16');
$xmlToSign->UpdateAttrAt('DocumentList|Document|FileSignatureList|Encryption|AES|IV',1,'encoding','Base64');
$xmlToSign->UpdateChildContent('DocumentList|Document|FileSignatureList|Encryption|AES|IV','z64oN9zXHt1+S3XACRSCYw==');
$xmlToSign->UpdateChildContent('DocumentList|Document|FileSignatureList|FileSignature|OrdinalNumber','1');
$xmlToSign->UpdateChildContent('DocumentList|Document|FileSignatureList|FileSignature|FileName','JPK_VAT_3_v1-1_20181201-000.xml.zip.aes');
$xmlToSign->UpdateChildContent('DocumentList|Document|FileSignatureList|FileSignature|ContentLength','16');
$xmlToSign->UpdateAttrAt('DocumentList|Document|FileSignatureList|FileSignature|HashValue',1,'algorithm','MD5');
$xmlToSign->UpdateAttrAt('DocumentList|Document|FileSignatureList|FileSignature|HashValue',1,'encoding','Base64');
$xmlToSign->UpdateChildContent('DocumentList|Document|FileSignatureList|FileSignature|HashValue','5MX0q1935fvMjLFV7E1yDw==');

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

$gen->SigLocation = 'InitUpload';
$gen->SigLocationMod = 0;
$gen->SigId = 'id-1234';
$gen->SigNamespacePrefix = 'ds';
$gen->SigNamespaceUri = 'http://www.w3.org/2000/09/xmldsig#';
$gen->SignedInfoCanonAlg = 'EXCL_C14N';
$gen->SignedInfoDigestMethod = 'sha256';

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

// <xades:QualifyingProperties Target="#id-1234" xmlns:xades="http://uri.etsi.org/01903/v1.3.2#">
//     <xades:SignedProperties Id="xades-id-1234">
//         <xades:SignedSignatureProperties>
//             <xades:SigningTime>TO BE GENERATED BY CHILKAT</xades:SigningTime>
//             <xades:SigningCertificate>
//                 <xades:Cert>
//                     <xades:CertDigest>
//                         <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
//                         <ds:DigestValue>TO BE GENERATED BY CHILKAT</ds:DigestValue>
//                     </xades:CertDigest>
//                     <xades:IssuerSerial>
//                         <ds:X509IssuerName>TO BE GENERATED BY CHILKAT</ds:X509IssuerName>
//                         <ds:X509SerialNumber>TO BE GENERATED BY CHILKAT</ds:X509SerialNumber>
//                     </xades:IssuerSerial>
//                 </xades:Cert>
//             </xades:SigningCertificate>
//         </xades:SignedSignatureProperties>
//         <xades:SignedDataObjectProperties>
//             <xades:DataObjectFormat ObjectReference="#r-id-1">
//                 <xades:MimeType>text/xml</xades:MimeType>
//             </xades:DataObjectFormat>
//         </xades:SignedDataObjectProperties>
//     </xades:SignedProperties>
// </xades:QualifyingProperties>

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml')
$object1 = new COM("Chilkat.Xml");
$object1->Tag = 'xades:QualifyingProperties';
$object1->AddAttribute('xmlns:xades','http://uri.etsi.org/01903/v1.3.2#');
$object1->AddAttribute('Target','#id-1234');
$object1->UpdateAttrAt('xades:SignedProperties',1,'Id','xades-id-1234');
// Note: It may be that http://www.w3.org/2001/04/xmlenc#sha256 is needed in the following line instead of http://www.w3.org/2000/09/xmldsig#sha1
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime','TO BE GENERATED BY CHILKAT');
$object1->UpdateAttrAt('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestMethod',1,'Algorithm','http://www.w3.org/2000/09/xmldsig#sha1');
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestValue','TO BE GENERATED BY CHILKAT');
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:IssuerSerialV2','TO BE GENERATED BY CHILKAT');
$object1->UpdateAttrAt('xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat',1,'ObjectReference','#r-id-1');
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:MimeType','text/xml');

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

// -------- Reference 1 --------
// Build the following Transforms fragment:

// <ds:Transforms>
//     <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
//         <ds:XPath>not(ancestor-or-self::ds:Signature)</ds:XPath>
//     </ds:Transform>
//     <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
// </ds:Transforms>

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml')
$xml1 = new COM("Chilkat.Xml");
$xml1->Tag = 'ds:Transforms';
$xml1->UpdateAttrAt('ds:Transform',1,'Algorithm','http://www.w3.org/TR/1999/REC-xpath-19991116');
$xml1->UpdateChildContent('ds:Transform|ds:XPath','not(ancestor-or-self::ds:Signature)');
$xml1->UpdateAttrAt('ds:Transform[1]',1,'Algorithm','http://www.w3.org/2001/10/xml-exc-c14n#');

$gen->AddSameDocRef2('','sha256',$xml1,'');
$gen->SetRefIdAttr('','r-id-1');

// -------- Reference 2 --------
// Build the following Transforms fragment:

// <ds:Transforms>
//     <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
// </ds:Transforms>

// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Xml')
$xml2 = new COM("Chilkat.Xml");
$xml2->Tag = 'ds:Transforms';
$xml2->UpdateAttrAt('ds:Transform',1,'Algorithm','http://www.w3.org/2001/10/xml-exc-c14n#');

$gen->AddObjectRef2('xades-id-1234','sha256',$xml2,'http://uri.etsi.org/01903#SignedProperties');

// Provide a certificate + private key. (PFX password is test123)
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.Cert')
$cert = new COM("Chilkat.Cert");
$success = $cert->LoadPfxFile('qa_data/pfx/cert_test123.pfx','test123');
if ($success != 1) {
    print $cert->LastErrorText . "\n";
    exit;
}

$gen->SetX509Cert($cert,1);

$gen->KeyInfoType = 'X509Data';
$gen->X509Type = 'Certificate';

// Load XML to be signed...
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.StringBuilder')
$sbXml = new COM("Chilkat.StringBuilder");
$xmlToSign->GetXmlSb($sbXml);

$gen->Behaviors = 'IndentedSignature';

// Sign the XML...
$success = $gen->CreateXmlDSigSb($sbXml);
if ($success != 1) {
    print $gen->LastErrorText . "\n";
    exit;
}

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

// Save the signed XML to a file.
$success = $sbXml->WriteFile('qa_output/signedXml.xml','utf-8',0);

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

// ----------------------------------------
// Verify the signatures we just produced...
// For versions of Chilkat < 10.0.0, use new COM('Chilkat_9_5_0.Chilkat.XmlDSig')
$verifier = new COM("Chilkat.XmlDSig");
$success = $verifier->LoadSignatureSb($sbXml);
if ($success != 1) {
    print $verifier->LastErrorText . "\n";
    exit;
}

$numSigs = $verifier->NumSignatures;
$verifyIdx = 0;
while ($verifyIdx < $numSigs) {
    $verifier->Selector = $verifyIdx;
    $verified = $verifier->VerifySignature(1);
    if ($verified != 1) {
        print $verifier->LastErrorText . "\n";
        exit;
    }

    $verifyIdx = $verifyIdx + 1;
}

print 'All signatures were successfully verified.' . "\n";

?>