Perl
Chilkat2 Perl
XML Signature Multiple External References
See more XML Digital Signatures Examples
Demonstrates how to add multiple external references to an XML digital signature.Chilkat Perl Downloads
use strict;
use warnings;
use Chilkat2;
# 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>
#
my $success = 1;
my $gen = Chilkat2::XmlDSigGen->new;
$gen->SigLocation('');
$gen->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->SigId('xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4');
$gen->SigNamespacePrefix('ds');
$gen->SigNamespaceUri('http://www.w3.org/2000/09/xmldsig#');
$gen->SigValueId('xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue');
$gen->SignedInfoCanonAlg('C14N');
$gen->SignedInfoDigestMethod('sha256');
# Create an Object to be added to the Signature.
my $object1 = Chilkat2::Xml->new;
$object1->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(), '', '');
my $http = Chilkat2::Http->new;
my $bd = Chilkat2::BinData->new;
my $url = 'https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456';
$success = $http->QuickGetBd($url, $bd);
if (!$success) {
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) {
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) {
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) {
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)
my $cert = Chilkat2::Cert->new;
$success = $cert->LoadPfxFile('qa_data/pfx/cert_test123.pfx', 'test123');
if (!$success) {
print $cert->LastErrorText, "\n";
exit;
}
$gen->SetX509Cert($cert, 1);
$gen->KeyInfoType('X509Data');
$gen->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.
my $sbXml = Chilkat2::StringBuilder->new;
$gen->Behaviors('IndentedSignature');
# Sign the XML...
$success = $gen->CreateXmlDSigSb($sbXml);
if (!$success) {
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 signature we just produced...
my $verifier = Chilkat2::XmlDSig->new;
$success = $verifier->LoadSignatureSb($sbXml);
if (!$success) {
print $verifier->LastErrorText, "\n";
exit;
}
my $verified = $verifier->VerifySignature(1);
if (!$verified) {
print $verifier->LastErrorText, "\n";
exit;
}
print "This signature was successfully verified.\n";