PHP Extension

Sign Italian SPID Metadata XML

See more XML Digital Signatures Examples

Demonstrates how to create an XML digital signature for Italian SPID Metadata. PHP Extension

<?php

include("chilkat.php");

$success = false;

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

$success = true;

// Load the XML to be signed.
$sbXml = new CkStringBuilder();
$success = $sbXml->LoadFile('qa_data/xml_dsig/spid_metadata.xml','utf-8');
if ($success == false) {
    print 'Failed to load the input file.' . "\n";
    exit;
}

// The XML to sign contains XML such as this:

// <?xml version="1.0" encoding="utf-8"?>
// <md:EntityDescriptor xmlns:md="urn:oasis:names:tc:SAML:2.0:metadata" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" entityID="https://***.it" ID="_AE17AFFF-A600-49D5-B81D-76EEA55B50FF">
//     <md:SPSSODescriptor protocolSupportEnumeration="urn:oasis:names:tc:SAML:2.0:protocol" AuthnRequestsSigned="true" WantAssertionsSigned="true">
//         <md:KeyDescriptor use="signing">
//             <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
//                 <ds:X509Data>
//                     <ds:X509Certificate>MIIF5...</ds:X509Certificate>
//                 </ds:X509Data>
//             </ds:KeyInfo>
//         </md:KeyDescriptor>
//         <md:KeyDescriptor use="encryption">
//             <ds:KeyInfo xmlns:ds="http://www.w3.org/2000/09/xmldsig#">
//                 <ds:X509Data>
//                     <ds:X509Certificate>MIIF5...</ds:X509Certificate>
//                 </ds:X509Data>
//             </ds:KeyInfo>
//         </md:KeyDescriptor>
//         <md:SingleLogoutService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://***.it/it-it/spid/logout"/>
//         <md:NameIDFormat>urn:oasis:names:tc:SAML:2.0:nameid-format:transient</md:NameIDFormat>
//         <md:AssertionConsumerService Binding="urn:oasis:names:tc:SAML:2.0:bindings:HTTP-POST" Location="https://***.it/it-it/spid/loginresp" index="0" isDefault="true"/>
//         <md:AttributeConsumingService index="1">
//             <md:ServiceName xml:lang="it">Servizi Online</md:ServiceName>
//             <md:ServiceDescription xml:lang="it">Accesso ai Servizi Online</md:ServiceDescription>
//             <md:RequestedAttribute Name="spidCode" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
//             <md:RequestedAttribute Name="name" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
//             <md:RequestedAttribute Name="familyName" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
//             <md:RequestedAttribute Name="fiscalNumber" NameFormat="urn:oasis:names:tc:SAML:2.0:attrname-format:basic"/>
//         </md:AttributeConsumingService>
//     </md:SPSSODescriptor>
//     <md:Organization>
//         <md:OrganizationName xml:lang="it">SomeCompany s.r.l.</md:OrganizationName>
//         <md:OrganizationDisplayName xml:lang="it">SomeCompany s.r.l.</md:OrganizationDisplayName>
//         <md:OrganizationURL xml:lang="it">https://***.it</md:OrganizationURL>
//     </md:Organization>
// </md:EntityDescriptor>

$gen = new CkXmlDSigGen();

$gen->put_SigLocation('md:EntityDescriptor|md:SPSSODescriptor');
$gen->put_SigLocationMod(2);
$gen->put_SignedInfoCanonAlg('EXCL_C14N');
$gen->put_SignedInfoDigestMethod('sha256');

// -------- Reference 1 --------
$gen->AddSameDocRef('_AE17AFFF-A600-49D5-B81D-76EEA55B50FF','sha256','EXCL_C14N','','');

// 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+KeyValue');
$gen->put_X509Type('Certificate');

$gen->put_Behaviors('IndentedSignature,ForceAddEnvelopedSignatureTransform,OmitAlreadyDefinedSigNamespace');

// 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('qa_output/signedXml.xml','utf-8',false);

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

// ----------------------------------------
// Verify the signatures we just produced...
$verifier = new CkXmlDSig();
$success = $verifier->LoadSignatureSb($sbXml);
if ($success != true) {
    print $verifier->lastErrorText() . "\n";
    exit;
}

$numSigs = $verifier->get_NumSignatures();
$verifyIdx = 0;
while ($verifyIdx < $numSigs) {
    $verifier->put_Selector($verifyIdx);
    $verified = $verifier->VerifySignature(true);
    if ($verified != true) {
        print $verifier->lastErrorText() . "\n";
        exit;
    }

    $verifyIdx = $verifyIdx + 1;
}

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

?>