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(PHP Extension) XML Signature Multiple External ReferencesDemonstrates how to add multiple external references to an XML digital signature.
<?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. // This example creates the following signed XML with multiple external references: // <?xml version="1.0" encoding="UTF-8"?> // <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4"> // <ds:SignedInfo> // <ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/> // <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/> // <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref0" URI="https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456"> // <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> // <ds:DigestValue>...</ds:DigestValue> // </ds:Reference> // <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref1" URI="https://isus.ezdrowie.gov.pl/fhir/Encounter/124/_history/22"> // <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> // <ds:DigestValue>...</ds:DigestValue> // </ds:Reference> // <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref2" URI="https://isus.ezdrowie.gov.pl/fhir/Condition/125/_history/1"> // <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> // <ds:DigestValue>...</ds:DigestValue> // </ds:Reference> // <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref3" URI="https://isus.ezdrowie.gov.pl/fhir/Procedure/126/_history/1"> // <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> // <ds:DigestValue>...</ds:DigestValue> // </ds:Reference> // <ds:Reference Type="http://uri.etsi.org/01903#SignedProperties" URI="#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops"> // <ds:Transforms> // <ds:Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/> // </ds:Transforms> // <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> // <ds:DigestValue>...</ds:DigestValue> // </ds:Reference> // </ds:SignedInfo> // <ds:SignatureValue Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue">...</ds:SignatureValue> // <ds:KeyInfo> // <ds:X509Data> // <ds:X509Certificate>...</ds:X509Certificate> // <ds:X509SubjectName>...</ds:X509SubjectName> // <ds:X509IssuerSerial> // <ds:X509IssuerName>...</ds:X509IssuerName> // <ds:X509SerialNumber>...</ds:X509SerialNumber> // </ds:X509IssuerSerial> // </ds:X509Data> // </ds:KeyInfo> // <ds:Object> // <xades:QualifyingProperties xmlns:xades="http://uri.etsi.org/01903/v1.3.2#" xmlns:xades141="http://uri.etsi.org/01903/v1.4.1#" Target="#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4"> // <xades:SignedProperties Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops"> // <xades:SignedSignatureProperties> // <xades:SigningTime>2021-06-02T07:10:13.306+02:00</xades:SigningTime> // <xades:SigningCertificate> // <xades:Cert> // <xades:CertDigest> // <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> // <ds:DigestValue>...</ds:DigestValue> // </xades:CertDigest> // <xades:IssuerSerial> // <ds:X509IssuerName>...</ds:X509IssuerName> // <ds:X509SerialNumber>...</ds:X509SerialNumber> // </xades:IssuerSerial> // </xades:Cert> // <xades:Cert> // <xades:CertDigest> // <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> // <ds:DigestValue>...</ds:DigestValue> // </xades:CertDigest> // <xades:IssuerSerial> // <ds:X509IssuerName>...</ds:X509IssuerName> // <ds:X509SerialNumber>...</ds:X509SerialNumber> // </xades:IssuerSerial> // </xades:Cert> // <xades:Cert> // <xades:CertDigest> // <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/> // <ds:DigestValue>...</ds:DigestValue> // </xades:CertDigest> // <xades:IssuerSerial> // <ds:X509IssuerName>...</ds:X509IssuerName> // <ds:X509SerialNumber>...</ds:X509SerialNumber> // </xades:IssuerSerial> // </xades:Cert> // </xades:SigningCertificate> // </xades:SignedSignatureProperties> // </xades:SignedProperties> // </xades:QualifyingProperties> // </ds:Object> // </ds:Signature> // $success = true; $gen = new CkXmlDSigGen(); $gen->put_SigLocation(''); $gen->put_SigLocationMod(0); // Note: ID's simply need to be unique values in the signed XML document. They don't necessarily need to be GUID/UUID formatted. $gen->put_SigId('xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4'); $gen->put_SigNamespacePrefix('ds'); $gen->put_SigNamespaceUri('http://www.w3.org/2000/09/xmldsig#'); $gen->put_SigValueId('xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue'); $gen->put_SignedInfoCanonAlg('C14N'); $gen->put_SignedInfoDigestMethod('sha256'); // Create an Object to be added to the Signature. $object1 = new CkXml(); $object1->put_Tag('xades:QualifyingProperties'); $object1->AddAttribute('xmlns:xades','http://uri.etsi.org/01903/v1.3.2#'); $object1->AddAttribute('xmlns:xades141','http://uri.etsi.org/01903/v1.4.1#'); $object1->AddAttribute('Target','#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4'); $object1->UpdateAttrAt('xades:SignedProperties',true,'Id','xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops'); $object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime','TO BE GENERATED BY CHILKAT'); // This assumes there are 3 certs in the certificate chain: The signing certificate, an intermediate root, and the root CA. // Remove the lines with "Cert[2]" if there is no intermediate root... $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'); $object1->UpdateAttrAt('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:CertDigest|ds:DigestMethod',true,'Algorithm','http://www.w3.org/2001/04/xmlenc#sha256'); $object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:CertDigest|ds:DigestValue','TO BE GENERATED BY CHILKAT'); $object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:IssuerSerial|ds:X509IssuerName','TO BE GENERATED BY CHILKAT'); $object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[1]|xades:IssuerSerial|ds:X509SerialNumber','TO BE GENERATED BY CHILKAT'); $object1->UpdateAttrAt('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:CertDigest|ds:DigestMethod',true,'Algorithm','http://www.w3.org/2001/04/xmlenc#sha256'); $object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:CertDigest|ds:DigestValue','TO BE GENERATED BY CHILKAT'); $object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:IssuerSerial|ds:X509IssuerName','TO BE GENERATED BY CHILKAT'); $object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert[2]|xades:IssuerSerial|ds:X509SerialNumber','TO BE GENERATED BY CHILKAT'); $gen->AddObject('',$object1->getXml(),'',''); $http = new CkHttp(); $bd = new CkBinData(); $url = 'https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456'; $success = $http->QuickGetBd($url,$bd); if ($success != true) { print $http->lastErrorText() . "\n"; exit; } // -------- Reference 1 -------- $gen->AddExternalBinaryRef($url,$bd,'sha256',''); $gen->SetRefIdAttr($url,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref0'); // -------- Reference 2 -------- $bd->Clear(); $url = 'https://isus.ezdrowie.gov.pl/fhir/Encounter/789/_history/1'; $success = $http->QuickGetBd($url,$bd); if ($success != true) { print $http->lastErrorText() . "\n"; exit; } $gen->AddExternalBinaryRef($url,$bd,'sha256',''); $gen->SetRefIdAttr($url,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref1'); // -------- Reference 3 -------- $bd->Clear(); $url = 'https://isus.ezdrowie.gov.pl/fhir/Condition/123456/_history/1'; $success = $http->QuickGetBd($url,$bd); if ($success != true) { print $http->lastErrorText() . "\n"; exit; } $gen->AddExternalBinaryRef($url,$bd,'sha256',''); $gen->SetRefIdAttr($url,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref2'); // -------- Reference 4 -------- $bd->Clear(); $url = 'https://isus.ezdrowie.gov.pl/fhir/Procedure/123456/_history/1'; $success = $http->QuickGetBd($url,$bd); if ($success != true) { print $http->lastErrorText() . "\n"; exit; } $gen->AddExternalBinaryRef($url,$bd,'sha256',''); $gen->SetRefIdAttr($url,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref3'); // -------- Reference 5 -------- $gen->AddObjectRef('xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops','sha256','C14N','','http://uri.etsi.org/01903#SignedProperties'); // 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('IssuerSerial,SubjectName,Certificate'); // This will be an enveloping signature where the Signature element // is the XML document root, the signed data is contained within Object // tag(s) within the Signature. // Therefore, pass an empty sbXml to CreateXmlDsigSb. $sbXml = new CkStringBuilder(); $gen->put_Behaviors('IndentedSignature'); // 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 signature we just produced... $verifier = new CkXmlDSig(); $success = $verifier->LoadSignatureSb($sbXml); if ($success != true) { print $verifier->lastErrorText() . "\n"; exit; } $verified = $verifier->VerifySignature(true); if ($verified != true) { print $verifier->lastErrorText() . "\n"; exit; } print 'This signature was successfully verified.' . "\n"; ?> |
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