Delphi: how to do digital signature with timestamp of files?

Many customers of mine use a software for doing digital signatures. This software is called Dike and it is provided from the italian chamber of commerce and it interfaces to smart card hardware like this.

Now I would like from my application to do the digital signatures, bypassing the software that does it.

Is it possible to do this in Delphi, did anyone already did it? I would like to add timestamp too.

NOTE FOR BOUNTY: I don't know how this is important outside of Italy, anyway in Italy there is a law that requires that certain documents are stored with particular rules. TO implmemetn this it is mandatory to digital sign and put a time stamp on the file (pfd files). Basically I ask "is it there anyonw that already imlpe开发者_如何学编程mented this in Delphi and found a succesful way. Can you share your results?". Basically there is a million of USB smartcard readers, I don't want to start supporting million of drivers in my application (I write an app that is in part a document management system), if there were seomthing like TWAIN is there for image scanner it would be great.

I could also accept the limitation to link to a specific hardware, so I can say if you want this feature you must buy this hardware, I don't want to support all the existing hardware or timestamp/digital signatures web services. So what I am looking for is Time Stamp and Digital Signature for pdf files for Delphi 1-0-1. I hope I expressed my self if not please ask.

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Our SecureBlackbox product provides full scope of PKI functionality including signing and timestamping data using CMS and CAdES formats and certificates can be located on PKCS#11-compatible smartcards. If you are looking for PDF signing and timestamping, then SecureBlackbox supports them as well (via PAdES standard).

SecureBlackbox is available for Delphi 4 to XE2 and supports 64-bit Windows.

We have clients form Italy who do exactly what you need.

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You mays also look at Gnostice PDFToolkit VCL wich allow you to "edit, secure, merge, split, view, digitally sign PDF documents".

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with signtool:

  c:\BinPath\signtool.exe sign /f c:\BinPath\Mypfxfile.pfx /p MyPassword 
  /t http:// timestamp.verisign.com/scripts/timstamp.dll c:\BinPath\Project1.exe