Le 2001-04-12, Alfred Perlstein écrivait :
> m: "Don't call me dude." *thwack* "The point is that if the
> workstation is untrusted, what's the stop the mallicious hacker
> from taking a read-only filehandle and swapping the top byte with
> the byte required for write access?"
The kernel could include a 'signature' in the handle, e.g. in the form of
a hash of (perm-bytes,handle-bytes,secret-key).
(But the following still holds:)
> s: "Master, this sounds like hella work!"
(plus some crypto algorithm right in kernel space...)
> m: "Ahhhh, you are correct, now get cracking!"
Thomas.
--
Thomas Quinot ** Département Informatique & Réseaux ** [EMAIL PROTECTED]
ENST // 46 rue Barrault // 75634 PARIS CEDEX 13
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