sgcSign 기능 참조

// Sign Spanish VeriFactu invoice
var
  vKeyProvider: TsgcPFXKeyProvider;
  vSigner: TsgcDocumentSigner;
begin
  vKeyProvider := TsgcPFXKeyProvider.Create(nil);
  try
    vKeyProvider.FileName := 'certificate.pfx';
    vKeyProvider.Password := 'secret';
    vKeyProvider.LoadFromFile;

    vSigner := TsgcDocumentSigner.Create(nil);
    try
      vSigner.KeyProvider := vKeyProvider;
      vSigner.Profile := spVeriFactu;
      memoSigned.Text := vSigner.SignXML(memoXML.Text);
    finally
      vSigner.Free;
    end;
  finally
    vKeyProvider.Free;
  end;
end;

// PAdES-T with visible signature appearance
var
  vKeyProvider: TsgcWindowsCertStoreProvider;
  vSigner: TsgcPAdESSigner;
  vTSA: TsgcTSAClient;
begin
  vKeyProvider := TsgcWindowsCertStoreProvider.Create(nil);
  vSigner := TsgcPAdESSigner.Create(nil);
  vTSA := TsgcTSAClient.Create(nil);
  try
    vKeyProvider.StoreName := 'MY';
    vKeyProvider.StoreLocation := cslCurrentUser;
    vKeyProvider.SelectCertificateBySubject('Acme Corp');

    vTSA.URL := 'https://freetsa.org/tsr';

    vSigner.KeyProvider := vKeyProvider;
    vSigner.TSAClient := vTSA;
    vSigner.Reason := 'Approved';
    vSigner.Location := 'Madrid, Spain';
    vSigner.VisibleSignature.Enabled := True;
    vSigner.SignPDFFile('contract.pdf', 'contract-signed.pdf');
  finally
    vTSA.Free;
    vSigner.Free;
    vKeyProvider.Free;
  end;
end;