When certain timestamp servers and EnableLtv=true we get "Arithmetic operation resulted in an overflow." exception when saving PDF document

[Jeffrey]

Hello,

When using timestamp server http://timestamp.digicert.com or https://freetsa.org/tsr and EnableLtv=true we get an Overflow exception with message 'Arithmetic operation resulted in an overflow.' when saving the PDF. 

When using timestamp server 'http://timestamp.ermis.gov.gr/TSS/HttpTspServer' with EnableLtv=true we don't get this exception.

When using timestamp server 'http://timestamp.digicert.com' with EnableLtv=false we don't get this exception. When set EnableLtv=true we get the exception.

We are using version 17.3.0.19 of Syncfusion.Pdf.Net.Core

Sample code:

            //Create PDF

            using (PdfDocument document = new PdfDocument())

            {

                //Load certificate

                PdfCertificate pdfCert = null;

                using (FileStream certificateStream1 = new FileStream(@".pfx", FileMode.Open, FileAccess.Read))

                {

                    pdfCert = new PdfCertificate(certificateStream1, "");

                }

                //Add a page to the document.

                PdfPage page = document.Pages.Add();

                //Draw the text.

                page.Graphics.DrawString("Hello World!!!", new PdfStandardFont(PdfFontFamily.Helvetica, 20), PdfBrushes.Black, new Syncfusion.Drawing.PointF(0, 0));

                //Add a signature.

                PdfSignature signature = new PdfSignature(document, page, pdfCert, "Signature");

                signature.TimeStampServer = new TimeStampServer(new Uri(@"http://timestamp.digicert.com")); 

                signature.EnableLtv = true;

                //Save to file system

                using (Stream tempPdfNameStream = new FileStream("file.pdf", FileMode.Create))

                {

                    document.Save(tempPdfNameStream);

                }

                document.Close();

            }

Regards,

Jeffrey

[Gowthamraj Kumar]

Hi Jeffrey, 

Thank you for using Syncfusion products. 

Currently we are trying to reproduce the reported issue in our end and we will update the further details on October 30^th 2019. 

Regards, 

Gowthamraj K 

[Sowmiya Loganathan]

Hi Jeffrey, 

We have tried to reproduce the mentioned issue with the provided code snippet. But we regret to let you know that we were unable to reproduce it. Please find the sample for the same and output document from below link, 

Sample link: https://www.syncfusion.com/downloads/support/forum/148569/ze/NETCoreSample116733554  

Output document link: https://www.syncfusion.com/downloads/support/forum/148569/pd/TimeStamp1394266679 

We suspect that the issue seems to be the file (.pfx) specific. So could you please share us the PFX file which you have used in your end, it will helpful for us to provide the precise solution on this. However we will analyze and provide the further details by 1^st November, 2019.  

Regards, 

Sowmiya Loganathan 

[Pon Geetha A J]

Hello, 

 

When we run you source code we can also not reproduce it. Once we replace the certificate with our own certificate we have the issue.  

The certificate we are using is not an own generated certificate but from a certificate authority. So we cannot upload it to the forum. Can we just reply to this email or …? 

We are also using .NET core 3.0 and not .NET core 2.1. You get a different error is using a different .NET core framework. 

If using .NET core 3.0 then we get exception: Arithmetic operation resulted in an overflow. 

   at Syncfusion.Pdf.Security.PdfSignatureDictionary.DocumentSaved(Object sender, DocumentSavedEventArgs e) 

   at Syncfusion.Pdf.PdfDocumentBase.OnDocumentSaved(DocumentSavedEventArgs args) 

   at Syncfusion.Pdf.PdfDocument.Save(Stream stream) 

   at NETCoreSample.Program.Main(String[] args) in C:\Temp\NETCoreSample116733554\NETCoreSample\NETCoreSample\Program.cs:line 44 

If using .NET core 2.1 then we get exception: Array dimensions exceeded supported range. 

   at Syncfusion.Pdf.Security.PdfSignatureDictionary.DocumentSaved(Object sender, DocumentSavedEventArgs e) 

   at Syncfusion.Pdf.PdfDocument.Save(Stream stream) 

   at NETCoreSample.Program.Main(String[] args) in C:\Temp\NETCoreSample116733554\NETCoreSample\NETCoreSample\Program.cs:line 44 

Thanks. 

Regards, 

Jeffrey 

[Sowmiya Loganathan]

Hi Jeffrey, 

 

Based on the stack trace, We have created a test patch to resolve the issue. Kindly tried the test patch your side and share the details. 

 

Please find sample with test patch assembly below, 

https://www.syncfusion.com/downloads/support/forum/148569/ze/NETCoreSample2047812814 

 

Regards, 

Sowmiya Loganathan 

[Jeffrey]

Hello,

I tried the test path with our own certificate and I can confirm that the test patch is working.

Good job.

Regards,

Jeffrey

[Sowmiya Loganathan]

Hi Jeffrey, 

Please find the patch for the reported issue from below and which can be downloaded from the following location.   

Recommended approach - exe will perform automatic configuration  

Please find the patch setup from below location:  

http://syncfusion.com/Installs/support/patch/17.3.0.14/1041681/F148569/SyncfusionPatch_17.3.0.14_1041681_11042019035230391_F148569.exe  

Advanced approach – use only if you have specific needs and can directly replace existing assemblies for your build environment  

Please find the patch assemblies alone from below location:  

http://syncfusion.com/Installs/support/patch/17.3.0.14/1041681/F148569/SyncfusionPatch_17.3.0.14_1041681_11042019035230391_F148569.zip  

NuGet packages: http://syncfusion.com/Installs/support/patch/17.3.0.14/1041681/F148569/SyncfusionNuget_17.3.0.14_1041681_11042019035230391_F148569.zip  

 

Assembly Version: 17.3.0.14  

 

Installation Directions :   

This patch should replace the files “Syncfusion.Pdf.Portable.dll” under the following folder.  

$system drive:\ Files\Syncfusion\Essential Studio\$Version # \precompiledassemblies\$Version# 

Eg : $system drive:\Program Files\Syncfusion\Essential Studio\17.3.0.14 \precompiledassemblies\17.3.0.14 

To automatically run the Assembly Manager, please check the Run assembly manager checkbox option while installing the patch. If this option is unchecked, the patch will replace the assemblies in precompiled assemblies’ folder only. Then, you will have to manually copy and paste them to the preferred location or you will have to run the Syncfusion Assembly Manager application (available from the Syncfusion Dashboard, installed as a shortcut in the Application menu) to re-install assemblies.  

Disclaimer :   

Please note that we have created this patch for version 17.3.0.14 specifically to resolve the following issue(s) reported in this/the Incident(s). 148569  

If you have received other patches for the same version for other products, please apply all patches in the order received.  

This fix will be included in our 2019 Volume 4 release which will be available by December 2019 tentatively. 

 

Regards, 

Sowmiya Loganathan