Hi all

Some time ago I posted a sample which shows how to sign large CMS data by calling CryptMsg API directly (How to call CryptMsg API in streaming mode (C#)) and that way overcome the current limitations of SignedCms in .NET ("ASN1 value too large" error when calling SignedCms.ComputeSignature).

I continued working on the sample and extended it quite a lot.Current version implementsSignedLargeCMS and EnvelopedLargeCMS, my own version ofSignedCms and EnvelopedCMS to work with large data.

I already shared thep/invoke declarationsI used (P/Invoking CryptoAPI in .NET. Part 2 (C#)), and you can findthe full version of the sample at Codeplex.

I hope this helps.

Regards,

Alex (Alejandro Campos Magencio)