Visible digital signature

Hi,

I downloaded trial version and want to make visible digital signature. Can somebody please help me how can i make visible signature? Is it possible to make visible digital signature with Debenu Quick PDF Library?

I use Delphi 7 with DebenuQuickPDFLibrary0913 on WindowsXP.

The code, which i tried, open input pdf file, then create FormField with SetSignProcessField command (from manual: The created field will be invisible (zero width and height) and will be attached to the first page in the document.), but don't return its ID. When i want to find it by its name, function FindFormFieldByTitle returns 0 (The form field could not be found.)
How can i use function SetFormFieldSignatureImage, when i need to pass it signature form field? I tried make newFormField, but it didn't reach the desired result (maybe i did some mistake).

Thanks for any advice
Petr Gabriel

const
FORMFIELD_NAME = 'DIGITAL_SIGNATURE';
var
PDFLibrary: TDebenuPDFLibrary0913;
UnlockResult: Integer;
SignProcessID: Integer;
ImageID: Integer;
FormFieldIndex: Integer;
begin
PDFLibrary:= TDebenuPDFLibrary0913.Create();
try
    UnlockResult:= PDFLibrary.UnlockKey(MY_UNLOCK_KEY);
    if UnlockResult = 1 then begin
      SignProcessID:= PDFLibrary.NewSignProcessFromFile('c:\home\input.pdf', '');
      if SignProcessID = 0 then begin
        MessageDlg('Error: NewSignProcessFromFile', Dialogs.mtError, [Dialogs.mbOK], 0);
        Exit;
      end;
      if PDFLibrary.SetSignProcessField(SignProcessID, FORMFIELD_NAME) = 0 then begin
        MessageDlg('Error: SetSignProcessField', Dialogs.mtError, [Dialogs.mbOK], 0);
        Exit;
      end;
      MessageDlg('FormFieldCount: ' + IntToStr(PDFLibrary.FormFieldCount()),
                  Dialogs.mtInformation, [Dialogs.mbOK], 0);
      FormFieldIndex:= PDFLibrary.FindFormFieldByTitle(FORMFIELD_NAME);
      if FormFieldIndex = 0 then begin
        MessageDlg('Error: FindFormFieldByTitle', Dialogs.mtError, [Dialogs.mbOK], 0);
        Exit;
      end;
      if PDFLibrary.SetFormFieldVisible(FormFieldIndex, 1) = 0 then begin
        MessageDlg('Error: SetFormFieldVisible', Dialogs.mtError, [Dialogs.mbOK], 0);
        Exit;
      end;
      if PDFLibrary.SetFormFieldBounds(FormFieldIndex, 25, 500, 100, 100) = 0 then begin
        MessageDlg('Error: SetFormFieldBounds', Dialogs.mtError, [Dialogs.mbOK], 0);
        Exit;
      end;
      ImageID:= PDFLibrary.AddImageFromFile('C:\home\logo.gif', 0);
      if ImageID = 0 then begin
        MessageDlg('Error: AddImageFromFile', Dialogs.mtError, [Dialogs.mbOK], 0);
        Exit;
      end;
      if PDFLibrary.SelectImage(ImageID) = 0 then begin
        MessageDlg('Error: SelectImage', Dialogs.mtError, [Dialogs.mbOK], 0);
        Exit;
      end;
      if PDFLibrary.SetFormFieldSignatureImage(FormFieldIndex, PDFLibrary.SelectedImage(), 0) = 0 then begin
        MessageDlg('Error: SetFormFieldSignatureImage', Dialogs.mtError, [Dialogs.mbOK], 0);
        Exit;
      end;
      if PDFLibrary.SetSignProcessInfo(SignProcessID, 'Reason: Test', 'Location: CZ', 'Contact: PhoneNumber') = 0 then begin
        MessageDlg(Error: SetSignProcessInfo, Dialogs.mtError, [Dialogs.mbOk], 0);
        Exit;
      end;
      if PDFLibrary.SetSignProcessPFXFromFile(SignProcessID, 'c:\home\cacert\cacert.p12', MY_CERT_PASSWORD) = 0 then begin
        MessageDlg(Error: SetSignProcessPFXFromFile, Dialogs.mtError, [Dialogs.mbOK], 0);
        Exit;
      end;
      PDFLibrary.EndSignProcessToFile(SignProcessID, 'c:\home\output.pdf');
    end
    else
      MessageDlg('Invalid lincese key', Dialogs.mtError, [Dialogs.mbOK], 0);
finally
    PDFLibrary.Free();
end;
end;

The simple answer is that you can not do this today.  Ingo has kindly provided a solution for a question you did not ask, about detecting whether a PDF is signed.

struhadlo and tfrost,

Hi,
I'm having troubles getting this to work in asp using the ActiveX module...
Result all come back as '1' until the EndSignProcessToFile which returns '0'. But that does not tell me why.

Using the second method, (SignFile) it returns '7' which says it has the wrong password.
However, the same data works fine using jSignPDF.
Can you help me understand what the requirements of the pfx file is that will allow me to get rid of jsignpdf?
Code in use:
     SigProcID = QP.NewSignProcessFromFile(FilePath,OpenPassword)
     result = QP.SetSignProcessInfo(SigProcID,Reason,Location,ContactInfo)
     response.write "Result: "& result & "<br>" & vbCrLf
     result = QP.SetSignProcessField(SigProcID,"DigitalSignature")
     response.write "Result: "& result & "<br>" & vbCrLf
     result = QP.SetSignProcessFieldBounds(SigProcID, 100, 600, 200, 100)
     response.write "Result: "& result & "<br>" & vbCrLf
    result = QP.SetSignProcessFieldImageFromFile(SigProcID, SigImageFile, 0)
     response.write "Result: "& result & "<br>" & vbCrLf
     result = QP.SetSignProcessPFXFromFile(SigProcID,PFXFileName,PFXPassword)
     response.write "Result: "& result & "<br>" & vbCrLf
     result = QP.EndSignProcessToFile(SigProcID, OutputFileName)
     response.write "Result: "& result & ", Path: " & OutputFileName & "<br>" & vbCrLf

     result = QP.SignFile(FilePath, "", SignaturesFieldName, OutputFileName, PFXFileName, PFXPassword, Reason, Location, ContactInfo)
     response.write "Result: "& result & ", Path: " & OutPutFileName & "<br>" & vbCrLf


Output:
Saved: c:\inetpub\wwwroot\test\1367103662.pdf
Result: 1
Result: 1
Result: 1
Result: 1
Result: 1
Result: 0, Path: c:\inetpub\wwwroot\test\1367103662-signed.pdf
Result: 7, Path: c:\inetpub\wwwroot\test\1367103662-signed.pdf

Hi Guys,

This thread was about showing a visible signature block when a PDF is digitally signed.  If you are getting an error indicating an invalid password, that is something different: if the signature cannot be loaded, it clearly cannot be applied, with or without a visible presence.  Please show your actual code and the exact error return that you get, and someone may be able to help.

Instead of specifying a custom image file to fit into the digital signature form field, is there a way to generate the type of default Acrobat Digital Signature image generated by Acrobat digital signature?