Include 'timestamp' into hash signature with C# and Compact Framework

Question

I want to create a hash and sign it from a XML file in C# and Compact Framework 3.5. I obtain a signature of my with success. But now, Now, I want a signature with "trusted timestamp" like it's generated with CmsSigner and Pkcs9SigningTime.

My code to obtain and sign hash:

SHA1 sha1 = new SHA1CryptoServiceProvider();
byte[] hash = sha1.ComputeHash(File.ReadAllBytes("myfile.xml"));

RSACryptoServiceProvider RSAprov = (RSACryptoServiceProvider)myCert.PrivateKey;
byte[] signature = RSAprov.SignData(hash, CryptoConfig.MapNameToOID("sha1"));

Is it possible to include Pkcs9SigningTime in my signature with Compact Framework?

Answer 1

Probably easiest is to simply integrate a CMS library such as Bouncy Castle into your application.