transparent encryption file system driver enctrypted flag

Hi
I’m making a development on transparent encryption file system driver.Would you please give me some suggestion.
My thinking like this:
(1)Add encrypted flag at the end of  the file after encrypted.I’m trying to change some irp paramters,but failed.
(2)Delete this flag when recieve read request.
(3)I’m also trying IoBuildSynchronousFsdRequest to generate a write IRP,and then write enctypted flag to the end of the enctypted file.It seems reasonable.
Are all these methods feasible?
Thank you!


好玩贺卡等你发,邮箱贺卡全新上线!
http://card.mail.cn.yahoo.com/

Yet another “Hi, I am a newbie, and want to make the most difficult
driver in Windows. Although I don’t know how to search forums,
I am sure I can do it in a few weeks” post.

L.

Is fs filter so difficult? :slight_smile:

Regards
Haibo
-----Original Message-----
From: xxxxx@lists.osr.com
[mailto:xxxxx@lists.osr.com] On Behalf Of Ladislav Zezula
Sent: Thursday, May 07, 2009 4:09 PM
To: Windows File Systems Devs Interest List
Subject: Re: [ntfsd] transparent encryption file system driver enctrypted
flag

Yet another “Hi, I am a newbie, and want to make the most difficult
driver in Windows. Although I don’t know how to search forums,
I am sure I can do it in a few weeks” post.

L.


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