Digital Signature ValidateSignature function returns IsDocumentModified True while it is not

[Jacobs]

Kindly check the attached pdf file with two digital signatures when using function ValidateSignature

it shows IsDocumentModified as true while file is not modified and is opened correctly with Adobe Reader

i tested using latest nuget for windows forms 20.3.0.60

Also if using pdfloadeddocument with openandrepair=true ... no signatures at all are detected... document.form is nothing

While repair works fine with other pdfs and helps in repairing other files that have issue.

PDF version 1.7

Attachment: notmodified_d69f4c7f.zip

[Irfana Jaffer Sadhik]

it shows IsDocumentModified as true while file is not modified and is opened correctly with Adobe Reader

We have recently resolved similar problem and the fix for this problem is included in our upcoming 2022 Volume 4 main release, which will be available on mid of December 2022.   Note: If you require a patch for the reported issue in any of our Essential Studio Main or SP release versions, then kindly let us know the version, so that we can provide a patch in that version based on our SLA policy.   Disclaimer: “Inclusion of this solution in the weekly release may change due to other factors including but not limited to QA checks and works reprioritization.”

Also if using pdfloadeddocument with openandrepair=true ... no signatures at all are detected... document.form is nothing While repair works fine with other pdfs and helps in repairing other files that have issue.

Please follow up on the below ticket regarding the opening repair mode signature fields missing problem https://forumassist.syncfusion.com/179371

[Jacobs]

Yes please provide me with a patch ... because i am using latest nugget version 20.3.0.60 which was released last week and it still have same issue (IsDocumentModified = true) on the specific pdf i attached

Note that there was a different pdf having similar issue (IsDocumentModified = true) and was fixed in a new nugget release.

So if you haven't check the pdf i attached... please do.

also i can't access this link  https://forumassist.syncfusion.com/179371

[Irfana Jaffer Sadhik]

 

Yes please provide me with a patch ... because i am using latest nugget version 20.3.0.60 which was released last week and it still have same issue (IsDocumentModified = true) on the specific pdf i attached Note that there was a different pdf having similar issue (IsDocumentModified = true) and was fixed in a new nugget release. So if you haven't check the pdf i attached... please do.

We have created a custom NuGet for this problem in our latest version of v20.3.0.61. Please try the below package on our end and let us know if you have any further assistance on this. As we said earlier the fix for this problem is included in our upcoming 2022 Volume 4 main release, which will be available on mid of December 2022.   Please refer to the package below, https://www.syncfusion.com/downloads/support/forum/179308/ze/F179308-1703238529.zip   Please refer to the below KB steps to install the custom NuGet package,  How to install the customer patch NuGet in Windows machine | Miscellaneous - Extension (syncfusion.com)

also i can't access this link  https://forumassist.syncfusion.com/179371

can you please check with the below link and let us know the result: https://www.syncfusion.com/forums/179371/digital-signature-pdfloadeddocument-openandrepair-does-not-detect-digital-signatures

[Jacobs]

ok thanks i will test the custom nugget that you provided  v20.3.0.61

Regarding the link  https://www.syncfusion.com/forums/179371/digital-signature-pdfloadeddocument-openandrepair-does-not-detect-digital-signatures 

this is a separate ticket that i already posted for the open&repair issue and still waiting for you reply

i will follow up there.

Thanks again

[Jacobs]

Dear Irfana Jaffer Sadhik

i tested the custom nugget  v20.3.0.61 that yu provided and the  IsDocumentModified is returned correctly

also the open&repair issue was solved in it.

only the annotions issue mentioned here is not yet solved 

https://www.syncfusion.com/forums/179370/digital-signature-annotations-not-detected

Thanks for your efforts 😊

i also found that the there was a new release with the same version no  20.3.0.61 released yesterday Tuesday, December 13, 2022  ... but the issues were not solved in it

May i know when these fixes will be included in the weekly nugget ?

[Irfana Jaffer Sadhik]

Since our 2022 volume 4 release is expected to be rolled out upcoming week. So there will be no weekly release this week. We will include the fix for the reported issue in our upcoming weekly NuGet release once our Volume 4 is rolled out which we excepted on mid of December.

 

Please use the below feedback link to track the status of the reported bug,

https://www.syncfusion.com/feedback/39780/annotation-and-signature-fields-are-missing-while-loading-an-existing-pdf-document

[Jacobs]

Thanks a lot 😊

[Irfana Jaffer Sadhik]

it shows IsDocumentModified as true while file is not modified and is opened correctly with Adobe Reader

We are glad to announce that our Essential Studio 2022 Volume 4 Main Release V20.4.0.38 is rolled out and is available for download under the following link. https://www.syncfusion.com/forums/179561/essential-studio-2022-volume-4-main-release-v20-4-0-38-is-available-for-download We thank you for your support and appreciate your patience in waiting for this release. Please get in touch with us if you would require any further assistance.

[Jacobs]

Hello Irfana,

Happy new year ... i tested the latest nugget release and the issue has been solved.

Thanks alot for your support.

[Jacobs]

Dear Irfana,

i had this issue re-appeared again (IsDocumentModified=True with another file (attached) signed with 3 signatures , while it is not modified and appears fine on Adobe.

Attachment: ismodified_ccd65ce6.zip

[Jacobs]

kindly find attached some other files containing the same issue isdocumentmodified=true

i hope you can include the fix in this week's release.

Attachment: ismodified_20230115_53a1c133.zip

[Jacobs]

Dear Irfana,

i did some additional testing and attached some other files that have the same issue ( IsDocumentModified=true )

Waiting for your reply

Attachment: IsModifiedIssue20230115_3dd3858f.zip

[Irfana Jaffer Sadhik]

Thank you for sharing the details. We will include all the provided documents for testing and will provide a valid fix for the reported issue. Currently we are validating on this and will provide the further validation details on January 18th, 2023.

[Jacobs]

Thanks Irfana.

i would also appreciate if you can provide a technical explanation regarding the signature that caused the issue to reappear again (if there is something missing or wrong in a specific signature)  ... after you finish your investigation.

[Jacobs]

Any update ?

[Irfana Jaffer Sadhik]

We confirmed the issue “IsDocumentModified returns incorrect values for multiple signatures documents” as a defect in our product and defect and we will include the fix into our upcoming weekly NuGet release, which will be available on January 31^st, 2023.

Please use the below feedback link to track the status of the reported bug.

IsDocumentModified returns incorrect values for multiple signatures documents in WinForms | Feedback Portal (syncfusion.com)

​

Note: If you require a patch for the reported issue in any of our Essential Studio Main or SP release version, then kindly let us know the version, so that we can provide a patch in that version based on our SLA policy.

Disclaimer: “Inclusion of this solution in the weekly release may change due to other factors including but not limited to QA checks and works reprioritization.”

[Jacobs]

Thanks Irfana .... Can you please provide me with a patch for winforms nuget version 20.4.0.43 ?

[Irfana Jaffer Sadhik]

We will share a custom NuGet package for the fix as the weekly release version mentioned “20.4.0.43”. It is expected to be available on January 31, 2023

[Jacobs]

Thanks ... Will the official release including the fix be released 31/01/2023 as mentioned earlier ... same day as the custom nuget ?

[Irfana Jaffer Sadhik]

Since our 2022 volume 4 SP release is expected to be rolled out in the upcoming week. So there will be no weekly release this week. We will include the fix for the reported issue in our Volume 4 SP release which we excepted at the end of January.

 

Please use the below feedback link to track the status of the reported bug:

https://www.syncfusion.com/feedback/40544/isdocumentmodified-returns-incorrect-values-for-multiple-signatures-documents

Disclaimer: “Inclusion of this solution in the weekly release may change due to other factors, including but not limited to QA checks and works reprioritization.

[Irfana Jaffer Sadhik]

Due to some technical reasons, we were unable to include the fix for this issue as promised. However, we have created a custom NuGet package, version “20.4.0.43”, which is available for reference. The public release of this fix is expected to be available on February 7th, 2023 with the next weekly release.

NuGet Package: https://www.syncfusion.com/downloads/support/forum/179308/ze/179308-1267333629.zip

Please refer to the below KB steps to install the custom NuGet package,    

https://www.syncfusion.com/kb/11556/how-to-install-the-customer-patch-nuget-in-windows-machine

[Jacobs]

Thanks Irfana

i have tested the custom nuget and it is working fine with all the files that were reported before and the property IsDocumentModified is correct.

May i know when this fix will be included in the official release?

[Irfana Jaffer Sadhik]

The weekly release has been delayed due to issues with dependent libraries during NuGet package building. More information will be provided on February 8th, 2023

[Jacobs]

Ok ... Thanks for your fast reply .

[Irfana Jaffer Sadhik]

We have included the fix for the reported issue “IsDocumentModified returns incorrect values for multiple signatures documents” in our latest weekly NuGet release (v20.4.0.49).

Please use the below link to download our latest weekly NuGet,    

https://www.nuget.org/packages/Syncfusion.Pdf.WinForms/20.4.0.49   

[Jacobs]

I tested the new nuget v20.4.0.49 and the issue has been fixed in it ... Thanks Irfana for your usual support.