CoSign LARGE files WITHOUT large memory requirements

From: Alon Bar-Lev (alon_at_xor-t.com)
Date: 03/22/05 

Date: Tue, 22 Mar 2005 20:40:42 +0200

Hello,

My mission is to cosign a large attached signature without allocated memory
at the size of the content.

I am trying to cosign a large PKCS#7 file, I use CryptOpenMsgToDecode and
streams in order to do so.
After cosigning, I use CryptMsgGetParam with CMSG_ENCODED_MESSAGE I get a
detached signature.
Now I need to take the original data and the detached signature and combain
them into one attached PKCS#7 file.

I couldn't figure out how to use CryptMsgOpenToEncode or any other relevant
CryptMsg API in order to do that.

Can anyone help?

Best Regards,
Alon Bar-Lev

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