Delphi DLL
Delphi DLL
XML Signature Multiple External References
See more XML Digital Signatures Examples
Demonstrates how to add multiple external references to an XML digital signature.Chilkat Delphi DLL Downloads
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, XmlDSigGen, XmlDSig, StringBuilder, BinData, Cert, Http, Xml;
...
procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
gen: HCkXmlDSigGen;
object1: HCkXml;
http: HCkHttp;
bd: HCkBinData;
url: PWideChar;
cert: HCkCert;
sbXml: HCkStringBuilder;
verifier: HCkXmlDSig;
verified: Boolean;
begin
success := False;
// 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 := CkXmlDSigGen_Create();
CkXmlDSigGen_putSigLocation(gen,'');
CkXmlDSigGen_putSigLocationMod(gen,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.
CkXmlDSigGen_putSigId(gen,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4');
CkXmlDSigGen_putSigNamespacePrefix(gen,'ds');
CkXmlDSigGen_putSigNamespaceUri(gen,'http://www.w3.org/2000/09/xmldsig#');
CkXmlDSigGen_putSigValueId(gen,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue');
CkXmlDSigGen_putSignedInfoCanonAlg(gen,'C14N');
CkXmlDSigGen_putSignedInfoDigestMethod(gen,'sha256');
// Create an Object to be added to the Signature.
object1 := CkXml_Create();
CkXml_putTag(object1,'xades:QualifyingProperties');
CkXml_AddAttribute(object1,'xmlns:xades','http://uri.etsi.org/01903/v1.3.2#');
CkXml_AddAttribute(object1,'xmlns:xades141','http://uri.etsi.org/01903/v1.4.1#');
CkXml_AddAttribute(object1,'Target','#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4');
CkXml_UpdateAttrAt(object1,'xades:SignedProperties',True,'Id','xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops');
CkXml_UpdateChildContent(object1,'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...
CkXml_UpdateAttrAt(object1,'xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestMethod',True,'Algorithm','http://www.w3.org/2001/04/xmlenc#sha256');
CkXml_UpdateChildContent(object1,'xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestValue','TO BE GENERATED BY CHILKAT');
CkXml_UpdateChildContent(object1,'xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:IssuerSerialV2','TO BE GENERATED BY CHILKAT');
CkXmlDSigGen_AddObject(gen,'',CkXml__getXml(object1),'','');
http := CkHttp_Create();
bd := CkBinData_Create();
url := 'https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456';
success := CkHttp_QuickGetBd(http,url,bd);
if (success <> True) then
begin
Memo1.Lines.Add(CkHttp__lastErrorText(http));
Exit;
end;
// -------- Reference 1 --------
CkXmlDSigGen_AddExternalBinaryRef(gen,url,bd,'sha256','');
CkXmlDSigGen_SetRefIdAttr(gen,url,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref0');
// -------- Reference 2 --------
CkBinData_Clear(bd);
url := 'https://isus.ezdrowie.gov.pl/fhir/Encounter/789/_history/1';
success := CkHttp_QuickGetBd(http,url,bd);
if (success <> True) then
begin
Memo1.Lines.Add(CkHttp__lastErrorText(http));
Exit;
end;
CkXmlDSigGen_AddExternalBinaryRef(gen,url,bd,'sha256','');
CkXmlDSigGen_SetRefIdAttr(gen,url,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref1');
// -------- Reference 3 --------
CkBinData_Clear(bd);
url := 'https://isus.ezdrowie.gov.pl/fhir/Condition/123456/_history/1';
success := CkHttp_QuickGetBd(http,url,bd);
if (success <> True) then
begin
Memo1.Lines.Add(CkHttp__lastErrorText(http));
Exit;
end;
CkXmlDSigGen_AddExternalBinaryRef(gen,url,bd,'sha256','');
CkXmlDSigGen_SetRefIdAttr(gen,url,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref2');
// -------- Reference 4 --------
CkBinData_Clear(bd);
url := 'https://isus.ezdrowie.gov.pl/fhir/Procedure/123456/_history/1';
success := CkHttp_QuickGetBd(http,url,bd);
if (success <> True) then
begin
Memo1.Lines.Add(CkHttp__lastErrorText(http));
Exit;
end;
CkXmlDSigGen_AddExternalBinaryRef(gen,url,bd,'sha256','');
CkXmlDSigGen_SetRefIdAttr(gen,url,'xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref3');
// -------- Reference 5 --------
CkXmlDSigGen_AddObjectRef(gen,'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 := CkCert_Create();
success := CkCert_LoadPfxFile(cert,'qa_data/pfx/cert_test123.pfx','test123');
if (success <> True) then
begin
Memo1.Lines.Add(CkCert__lastErrorText(cert));
Exit;
end;
CkXmlDSigGen_SetX509Cert(gen,cert,True);
CkXmlDSigGen_putKeyInfoType(gen,'X509Data');
CkXmlDSigGen_putX509Type(gen,'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 := CkStringBuilder_Create();
CkXmlDSigGen_putBehaviors(gen,'IndentedSignature');
// Sign the XML...
success := CkXmlDSigGen_CreateXmlDSigSb(gen,sbXml);
if (success <> True) then
begin
Memo1.Lines.Add(CkXmlDSigGen__lastErrorText(gen));
Exit;
end;
// -----------------------------------------------
// Save the signed XML to a file.
success := CkStringBuilder_WriteFile(sbXml,'qa_output/signedXml.xml','utf-8',False);
Memo1.Lines.Add(CkStringBuilder__getAsString(sbXml));
// ----------------------------------------
// Verify the signature we just produced...
verifier := CkXmlDSig_Create();
success := CkXmlDSig_LoadSignatureSb(verifier,sbXml);
if (success <> True) then
begin
Memo1.Lines.Add(CkXmlDSig__lastErrorText(verifier));
Exit;
end;
verified := CkXmlDSig_VerifySignature(verifier,True);
if (verified <> True) then
begin
Memo1.Lines.Add(CkXmlDSig__lastErrorText(verifier));
Exit;
end;
Memo1.Lines.Add('This signature was successfully verified.');
CkXmlDSigGen_Dispose(gen);
CkXml_Dispose(object1);
CkHttp_Dispose(http);
CkBinData_Dispose(bd);
CkCert_Dispose(cert);
CkStringBuilder_Dispose(sbXml);
CkXmlDSig_Dispose(verifier);
end;