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Perl

XML-DSig Add Reference with Transforms Specified Explicitly

Demonstrates how to use the new AddSameDocRef2 method to explicitly specify the XML Transforms fragment.

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use strict;
use warnings;
use Chilkat2;

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

my $success = 1;

# Create the following XML to be signed:

# <doc>
#     <s id="s1">Some text...</s>
#     <p>Some text...</p>
#     <p class="note">A note...</p>
# </doc>

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

my $xmlToSign = Chilkat2::Xml->new;
$xmlToSign->Tag('doc');
$xmlToSign->UpdateAttrAt('s', 1, 'id', 's1');
$xmlToSign->UpdateChildContent('s', 'Some text...');
$xmlToSign->UpdateChildContent('p', 'Some text...');
$xmlToSign->UpdateAttrAt('p[1]', 1, 'class', 'note');
$xmlToSign->UpdateChildContent('p[1]', 'A note...');

print $xmlToSign->GetXml(), "\n";

my $gen = Chilkat2::XmlDSigGen->new;

$gen->SigLocation('doc');
$gen->SigLocationMod(0);
$gen->SigId('Signature-78f29839-06af-448f-b479-ca46457fab1b-Signature');
$gen->SigNamespacePrefix('ds');
$gen->SigNamespaceUri('http://www.w3.org/2000/09/xmldsig#');
$gen->SigValueId('Signature-78f29839-06af-448f-b479-ca46457fab1b-SignatureValue');
$gen->SignedInfoCanonAlg('C14N');
$gen->SignedInfoDigestMethod('sha1');

# Set the KeyInfoId before adding references..
$gen->KeyInfoId('Signature-78f29839-06af-448f-b479-ca46457fab1b-KeyInfo');

# The following XML to be added as an Object to the Signature

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

# <xades:QualifyingProperties Id="Signature-78f29839-06af-448f-b479-ca46457fab1b-QualifyingProperties" Target="#Signature-78f29839-06af-448f-b479-ca46457fab1b-Signature" xmlns:ds="http://www.w3.org/2000/09/xmldsig#" xmlns:xades="http://uri.etsi.org/01903/v1.3.2#">
#     <xades:SignedProperties Id="Signature-78f29839-06af-448f-b479-ca46457fab1b-SignedProperties">
#         <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="#Reference-24eb6003-d41c-442c-a731-d4c58f94790b">
#                 <xades:Description/>
#                 <xades:ObjectIdentifier>
#                     <xades:Identifier Qualifier="OIDAsURN">urn:oid:1.2.840.10003.5.109.10</xades:Identifier>
#                     <xades:Description/>
#                 </xades:ObjectIdentifier>
#                 <xades:MimeType>text/xml</xades:MimeType>
#                 <xades:Encoding/>
#             </xades:DataObjectFormat>
#         </xades:SignedDataObjectProperties>
#     </xades:SignedProperties>
# </xades:QualifyingProperties>

my $object1 = Chilkat2::Xml->new;
$object1->Tag('xades:QualifyingProperties');
$object1->AddAttribute('Id', 'Signature-78f29839-06af-448f-b479-ca46457fab1b-QualifyingProperties');
$object1->AddAttribute('Target', '#Signature-78f29839-06af-448f-b479-ca46457fab1b-Signature');
$object1->AddAttribute('xmlns:ds', 'http://www.w3.org/2000/09/xmldsig#');
$object1->AddAttribute('xmlns:xades', 'http://uri.etsi.org/01903/v1.3.2#');
$object1->UpdateAttrAt('xades:SignedProperties', 1, 'Id', 'Signature-78f29839-06af-448f-b479-ca46457fab1b-SignedProperties');
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime', 'TO BE GENERATED BY CHILKAT');
# 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->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', '#Reference-24eb6003-d41c-442c-a731-d4c58f94790b');
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:Description', '');
$object1->UpdateAttrAt('xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:Identifier', 1, 'Qualifier', 'OIDAsURN');
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:Identifier', 'urn:oid:1.2.840.10003.5.109.10');
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:Description', '');
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:MimeType', 'text/xml');
$object1->UpdateChildContent('xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:Encoding', '');

print $object1->GetXml(), "\n";

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

# -------- Reference 1 --------

# Create the following Transforms fragment:

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

# <ds:Transforms>
#     <ds:Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
#     <ds:Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/>
#     <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
#         <ds:XPath xmlns:ds="http://www.w3.org/2000/09/xmldsig#">not(ancestor-or-self::ds:Signature)</ds:XPath>
#     </ds:Transform>
# </ds:Transforms>

my $xml1 = Chilkat2::Xml->new;
$xml1->Tag('ds:Transforms');
$xml1->UpdateAttrAt('ds:Transform', 1, 'Algorithm', 'http://www.w3.org/TR/2001/REC-xml-c14n-20010315');
$xml1->UpdateAttrAt('ds:Transform[1]', 1, 'Algorithm', 'http://www.w3.org/2000/09/xmldsig#enveloped-signature');
$xml1->UpdateAttrAt('ds:Transform[2]', 1, 'Algorithm', 'http://www.w3.org/TR/1999/REC-xpath-19991116');
$xml1->UpdateAttrAt('ds:Transform[2]|ds:XPath', 1, 'xmlns:ds', 'http://www.w3.org/2000/09/xmldsig#');
$xml1->UpdateChildContent('ds:Transform[2]|ds:XPath', 'not(ancestor-or-self::ds:Signature)');

# This is the "Transforms" XML fragment passed to AddSameDocRef2.
print $xml1->GetXml(), "\n";

$gen->AddSameDocRef2('', 'sha1', $xml1, '');

$gen->SetRefIdAttr('', 'Reference-24eb6003-d41c-442c-a731-d4c58f94790b');

# -------- Reference 2 --------
$gen->AddObjectRef('Signature-78f29839-06af-448f-b479-ca46457fab1b-SignedProperties', 'sha1', '', '', 'http://uri.etsi.org/01903#SignedProperties');

# -------- Reference 3 --------
$gen->AddSameDocRef('Signature-78f29839-06af-448f-b479-ca46457fab1b-KeyInfo', 'sha1', '', '', '');

# 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+KeyValue');
$gen->X509Type('CertChain');

# Load XML to be signed...
my $sbXml = Chilkat2::StringBuilder->new;
$xmlToSign->GetXmlSb($sbXml);

$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 signatures we just produced...
my $verifier = Chilkat2::XmlDSig->new;
$success = $verifier->LoadSignatureSb($sbXml);
if (!$success) {
    print $verifier->LastErrorText, "\n";
    exit;
}

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

    $verifyIdx = $verifyIdx + 1;
}

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