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(Perl) XML Signature Multiple External ReferencesDemonstrates how to add multiple external references to an XML digital signature.
use chilkat(); # 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 = 1; $gen = chilkat::CkXmlDSigGen->new(); $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 = chilkat::CkXml->new(); $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",1,"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:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestMethod",1,"Algorithm","http://www.w3.org/2001/04/xmlenc#sha256"); $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"); $gen->AddObject("",$object1->getXml(),"",""); $http = chilkat::CkHttp->new(); $bd = chilkat::CkBinData->new(); $url = "https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456"; $success = $http->QuickGetBd($url,$bd); if ($success != 1) { print $http->lastErrorText() . "\r\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 != 1) { print $http->lastErrorText() . "\r\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 != 1) { print $http->lastErrorText() . "\r\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 != 1) { print $http->lastErrorText() . "\r\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 = chilkat::CkCert->new(); $success = $cert->LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123"); if ($success != 1) { print $cert->lastErrorText() . "\r\n"; exit; } $gen->SetX509Cert($cert,1); $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 = chilkat::CkStringBuilder->new(); $gen->put_Behaviors("IndentedSignature"); # Sign the XML... $success = $gen->CreateXmlDSigSb($sbXml); if ($success != 1) { print $gen->lastErrorText() . "\r\n"; exit; } # ----------------------------------------------- # Save the signed XML to a file. $success = $sbXml->WriteFile("qa_output/signedXml.xml","utf-8",0); print $sbXml->getAsString() . "\r\n"; # ---------------------------------------- # Verify the signature we just produced... $verifier = chilkat::CkXmlDSig->new(); $success = $verifier->LoadSignatureSb($sbXml); if ($success != 1) { print $verifier->lastErrorText() . "\r\n"; exit; } $verified = $verifier->VerifySignature(1); if ($verified != 1) { print $verifier->lastErrorText() . "\r\n"; exit; } print "This signature was successfully verified." . "\r\n"; |
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