(Delphi ActiveX) XAdES using TSA Requiring Client Certificate

See more XML Digital Signatures Examples

Demonstrates how to create an XMLDSig (XAdES) signed document which includes an EncapsulatedTimestamp using a TSA (TimeStamp Authority) server requiring client certificate authentication. One such TSA is https://www3.postsignum.cz/TSS/TSS_crt/

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
sbXml: TChilkatStringBuilder;
gen: TChilkatXmlDSigGen;
object1: TChilkatXml;
cert: TChilkatCert;
jsonTsa: TChilkatJsonObject;
http: TChilkatHttp;

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

success := 1;

// Load the XML to be signed.  For example, the XML to be signed might contain something like this:

// <?xml version="1.0" encoding="utf-8"?>
// <TransakcniLogSystemu xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://nsess.public.cz/erms_trans/v_01_01" Id="Signature1">
//   <TransLogInfo>
//     <Identifikator>XYZ ABC</Identifikator>
//     <DatumVzniku>2022-12-20T14:39:02.3625922+01:00</DatumVzniku>
//     <DatumCasOd>2022-12-20T14:26:26.88</DatumCasOd>
//     <DatumCasDo>2022-12-20T14:39:02.287</DatumCasDo>
//     <Software>XYZ</Software>
//     <VerzeSoftware>2.0.19.32</VerzeSoftware>
//   </TransLogInfo>
//   <Udalosti>
//     <Udalost>
//       <Poradi>1</Poradi>
// ...

// Load the XML to be signed from a file.
// (XML can be loaded from other source, such as a string variable.)
sbXml := TChilkatStringBuilder.Create(Self);
success := sbXml.LoadFile('xmlToSign.xml','utf-8');

gen := TChilkatXmlDSigGen.Create(Self);

gen.SigLocation := 'TransakcniLogSystemu';
gen.SigLocationMod := 0;
gen.SigId := 'SignatureID-Signature1';
gen.SigNamespacePrefix := 'ds';
gen.SigNamespaceUri := 'http://www.w3.org/2000/09/xmldsig#';
gen.SignedInfoCanonAlg := 'C14N';
gen.SignedInfoDigestMethod := 'sha256';

// Set the KeyInfoId before adding references..
gen.KeyInfoId := 'KeyInfoId-Signature-Signature1';

// Create an Object to be added to the Signature.

// Note: Chilkat will automatically fill in the values marked as "TO BE GENERATED BY CHILKAT" at the time of signing.
// The EncapsulatedTimestamp will be automatically generated.

object1 := TChilkatXml.Create(Self);
object1.Tag := 'xades:QualifyingProperties';
object1.AddAttribute('xmlns:xades','http://uri.etsi.org/01903/v1.3.2#');
object1.AddAttribute('Target','#Signature1');

object1.UpdateAttrAt('xades:SignedProperties',1,'Id','SignedProperties-Signature-Signature1');
object1.UpdateChildContent('xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime','TO BE GENERATED BY CHILKAT');
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');

// The EncapsulatedTimestamp will be included in the unsigned properties.
object1.UpdateAttrAt('xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp',1,'Id','signature-timestamp-5561-8212-3316-5191');
object1.UpdateAttrAt('xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp|ds:CanonicalizationMethod',1,'Algorithm','http://www.w3.org/2001/10/xml-exc-c14n#');
object1.UpdateAttrAt('xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp|xades:EncapsulatedTimeStamp',1,'Encoding','http://uri.etsi.org/01903/v1.2.2#DER');
object1.UpdateChildContent('xades:UnsignedProperties|xades:UnsignedSignatureProperties|xades:SignatureTimeStamp|xades:EncapsulatedTimeStamp','TO BE GENERATED BY CHILKAT');

gen.AddObject('XadesObjectId-Signature1',object1.GetXml(),'','');

// -------- Reference 1 --------
gen.AddObjectRef('SignedProperties-Signature-Signature1','sha256','EXCL_C14N','','http://uri.etsi.org/01903#SignedProperties');

// -------- Reference 2 --------
gen.AddSameDocRef('KeyInfoId-Signature-Signature1','sha256','EXCL_C14N','','');
gen.SetRefIdAttr('KeyInfoId-Signature-Signature1','ReferenceKeyInfo');

// -------- Reference 3 --------
gen.AddSameDocRef('','sha256','EXCL_C14N','','');
gen.SetRefIdAttr('','Reference-Signature1');

// Provide a certificate + private key. (PFX password is test123)
cert := TChilkatCert.Create(Self);
success := cert.LoadPfxFile('qa_data/pfx/cert_test123.pfx','test123');
if (success <> 1) then
  begin
    Memo1.Lines.Add(cert.LastErrorText);
    Exit;
  end;
gen.SetX509Cert(cert.ControlInterface,1);

gen.KeyInfoType := 'X509Data';
gen.X509Type := 'Certificate';

gen.Behaviors := 'IndentedSignature';

// -------------------------------------------------------------------------------------------
// To have the EncapsulatedTimeStamp automatically added... 
// 1) Add the <xades:EncapsulatedTimeStamp Encoding="http://uri.etsi.org/01903/v1.2.2#DER">TO BE GENERATED BY CHILKAT</xades:EncapsulatedTimeStamp>
//    to the unsigned properties.  (This was accomplished in the above code.)
// 2) Specify the TSA URL (Timestamping Authority URL).
//    Here we specify the TSA URL:
// -------------------------------------------------------------------------------------------

jsonTsa := TChilkatJsonObject.Create(Self);
jsonTsa.UpdateString('timestampToken.tsaUrl','https://www3.postsignum.cz/TSS/TSS_crt/');
jsonTsa.UpdateBool('timestampToken.requestTsaCert',1);
gen.SetTsa(jsonTsa.ControlInterface);

// -------------------------------------------------------------------------------------------
// In this case, the TSA requires client certificate authentication.
// To provide your client certificate, the application will instantiate a Chilkat HTTP object,
// then set it up with a SSL/TLS client certificate, and then tell the XmlDSigGen object
// to use the HTTP object for connections to the TSA server.
// -------------------------------------------------------------------------------------------
http := TChilkatHttp.Create(Self);
success := http.SetSslClientCertPfx('/home/bob/pfxFiles/myClientSideCertWithPrivateKey.pfx','pfxPassword');
if (success <> 1) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// Tell the XmlDSigGen object to use the above HTTP object for TSA communications.
gen.SetHttpObj(http.ControlInterface);

// Sign the XML...
success := gen.CreateXmlDSigSb(sbXml.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(gen.LastErrorText);
    Exit;
  end;
// -----------------------------------------------

// Save the signed XML to a file.
success := sbXml.WriteFile('c:/temp/qa_output/signedXml.xml','utf-8',0);

Memo1.Lines.Add(sbXml.GetAsString());
end;