Hi,

I started to look wether I can decrypt PKCS#7 enveloped data with this security library but it seems that the utility class which does this is marked as internal and so not available for applications.

What can I do ?

best regards Graham

Well, I was lost in the woods again..

The CryptoApi call the library is calling doesn't support PKCS#7 but only PKCS#1 as far I understood from sources and M$oft documentation.

I have to make my own wrapper on CryptEncryptMessage (advapi32.dll) call to estabilish PKCS#7 decoding, shit :(
That looks not easy...

Fortunately I have good sources from you Mentalis boyz which shows me light how to make .NET wrapper objects...

The security library does not support enveloping data. This will be supported in the next version of the .NET framework [a beta version of this framework should be released in February].

As for the RSAKeyExchange class, we use it to work around a bug in the RSACryptoServiceProvider class. It cannot be used to envelop data.