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Sign documents with certificate from VB.NET 2010

Posted on 2016-10-26
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Last Modified: 2016-11-19
We have developed a Document Management System in VB.NET 2010. In the management system all types of documents can be added. In general, however, PDF, DOC, DOCX, XLS and XLSX documents are used.

I'm looking for a method to sign the documents with a personal certificate (from store of as a file) from the source code. I'm looking for a general method that can be used to each type of file.

Is there also a possibility to assigning a version number in such technique?

Regards,
Pirie
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Question by:Pirie
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by:anarki_jimbel
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by:Pirie
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No, sorry. That is not what I am looking for.

Thanks anyway
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by:Robberbaron (robr)
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can you advise what u mean by "Signing a file"...  PDF can be signed, as can EXE.

but not sure how to sign other doc types...  do you have a manual method currently ?

what is purpose of signing ?  if it to tell if modifications are made then usual method is to send a checksum with the document.
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by:Pirie
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Hi,

We have a application that can manage any type of file. There is a need for a function that can sign a document with the personal certificate of a user. The reason for this is that a user can state in this way that he has seen the file and will mark it as accepted.

For example: if a JPG is linked into out management system, the user should have the possibility to select this file in our system and sign it with his personal certificate.

Any idea?
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Pirie earned 0 total points
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Finally the best solution that I found is to use the iTextSharp library. Thanks for your comments.
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by:Pirie
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Finally the best solution that I found is to use the iTextSharp library. Thanks for your comments.
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by:Gustav Brock
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OK, thanks for the feedback.

/gustav
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Author Closing Comment

by:Pirie
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Finally the best solution that I found is to use the iTextSharp library. Thanks for your comments.
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