Re: about sys_call and ioctl (Modified by Shawn Erickson)
Re: about sys_call and ioctl (Modified by Shawn Erickson)
- Subject: Re: about sys_call and ioctl (Modified by Shawn Erickson)
- From: Tim Seufert <email@hidden>
- Date: Tue, 20 Apr 2004 13:42:43 -0700
On Apr 19, 2004, at 7:30 PM, yetty wrote:
-- Redirected on behalf of Ye Wenxi --
Dear sir,
Thank you for your advice. What I need is to access device from user
space.I think the method of accessing any type of device should be
similar.
OK. Actually I will write a File Filter Driver. And in user space I
want to access the driver and encode files.
Actually I want to encrypt files. For example, now there are some
files
(such as test1.rtf and test2.txt and so on)in Users/Ye/documents/・, and
normally everyone can open or read or write or save them. What I want
to
do is to protect them by command [Macintosh:/]Mary%crypt
/Users/Ye/documents/
・ After I input such command [Macintosh:/]Ye%crypt
/Users/Ye/documents/・
the contents of the files (such as test1.rtf and test2.txt and so on)
under
folder /Users/Ye/documents/ will be encrypted. Therefore anyone else
can
not read the contents of the files unless I input the decode command.
Could you use an encrypted disk image? MacOS X supports AES-128
encrypted disk images. You could mount one when you want its files to
be available, and unmount it when you don't.
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