Library to work with XAdES digital signatures

Question

I'm looking for a library compatible with microsoft.net framework that allows the creation and verification of XAdES signatures (XAdES, XAdES-C, XAdES-XL, etc...).

It is important that the library enable the programmer to choose:

1.- Type of certificate to use in the signature process (PFX file, Windows centralized store, SmartCard)
2.- CRL to validate the certificate.
3.- Possibility to include Time stamping on the signature.
4.- Possibility to include OCSP response on the signature.

All I found are libraries in Java, but have not found any libraries in .NET.

All suggestions are welcome.

Answer 1

It seems XAdES (XML Advances Digital Signature) is dificult to find :-D

I searched in the web but I only found implementations in Java using Apache libraries, and only 1 .NET library that is mentioned in some web forums:

SecureBlackbox by EldoS http://www.eldos.com/sbb/

In the tests in ran on this library I found it to work perfectly with documents that only need 1 signature, but when you need to multi-sign a document it surfaces some problems.

At the moment I have not found a functional implementation of XAdES in .NET that you can use to put multiple signatures in an XML with Timestamping al CRLs.

EDIT (27/08/2012):

A team at Microsoft France developed an implementation of XAdES using .NET 3.5.

At this moment the library is available for download at this Microsoft web site ( http://www.microsoft.com/france/interop/ressources/xades.aspx) and it supports XAdES, XAdES-T, XAdES-C, XAdES-X and XAdES-XL signatures.

A pretty good solution entirely written in .NET

Answer 2

At this moment, I'm in a team (with Víctor M. Villa) developing a library to provide XAdES support for the .NET Framework.

We've just released version 1.0, that provides early support for XAdES-BES, and we have soon in our Roadmap the inclusion os Countersignature and Cosignature.

Maybe the library can help you somehow. You can find it in XAdES .NET Project

It is compatible with NET 2.0 and 3.5.

Hope it helps.