If you are in .NET and your card is registered in the Windows
Certificate Store use X509Certificate2Signature.cs. If you only have a
PKCS11 compatible DLL use http://sourceforge.net/projects/pkcs11net/
and follow the code at http://itextpdf.com/book/digitalsignatures,
it's for java but the methods are similar.

Paulo

On Mon, Dec 31, 2012 at 11:48 AM, 1T3XT BVBA <[email protected]> wrote:
> On 31/12/2012 4:44, Jose M. Morales C. wrote:
>
> Hi there, I'm new to all this digital certificates and signing pdf, so I'm
> trying to make a program to sign PDF files with a Digital Certificate in a
> Smart Card.
>
> I'm able to do it with a development certificate generated by me, but when I
> try to sign with my Digital Certificate generated by the CA of my country,
> can't do it.  When I try to export the Private Key it does not find it,
> actually it's is not in Pkcs12Store.
>
> If I check the certificate in my machine it has a Private Key, but when I
> try to export the certificate It contains a restriction to export the
> private key.
>
> There is any difference when I work with this certificates?
>
>
> Of course there is!
> Your smart card would be very insecure if you were able to export the
> private key. Isn't this obvious?
> It should also be obvious that you shouldn't use PKCS#12 when you're
> supposed to use PKCS#11.
>
> There is EXCELLENT documentation available here:
> http://itextpdf.com/book/digitalsignatures
> Please read it!
>
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MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current
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