linux-kernel - Re: [PATCH] Smackv10: Smack rules grammar + their stateful parser

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <C1C917F8-57EA-434C-9FD8-CB5A4EAF2653@mac.com>
Date:	Tue, 6 Nov 2007 03:26:12 -0500
From:	Kyle Moffett <mrmacman_g4@....com>
To:	Adrian Bunk <bunk@...nel.org>
Cc:	"Ahmed S. Darwish" <darwish.07@...il.com>,
	Casey Schaufler <casey@...aufler-ca.com>, akpm@...l.org,
	torvalds@...l.org, linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Smackv10: Smack rules grammar + their stateful parser

On Nov 06, 2007, at 01:33:05, Adrian Bunk wrote:
> Can you limit this to 7bit ASCII and use isascii() somewhere?
>
> Otherwise I'd expect funny things to happen when you e.g. use  
> isspace() on the UTF-8 encoded character à.

Actually, you don't need to.  You tell them it expects UTF-8 encoded  
strings and be done with it.  All US-ASCII characters from 0 through  
127 (IE: high bit clear) are exactly the same in UTF-8, and UTF-8  
special characters have the high bit set in all bytes.  Therefore you  
just assume that anything with the high bit set is part of a word and  
you can handle basic UTF-8.  (It doesn't work on special UTF-8 space  
characters like nonbreaking space and similar, but handling those is  
significantly more complicated).

Cheers,
Kyle Moffett

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/