lkml.org 
[lkml]   [2001]   [Jan]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    On Tue, Jan 16, 2001 at 10:48:34AM +0100, Ingo Molnar wrote:
    > this is a safe, very fast [ O(1) ] object-permission model. (it's a
    > variation of a former idea of yours.) A process can pass object
    > fingerprints and kernel pointers to other processes too - thus the other
    > process can access the object too. Threads will 'naturally' share objects,
    >...

    Just setuid etc. doesn't work with that because access cannot be easily
    revoked without disturbing other clients.

    To handle that you would probably need a "relookup if needed" mechanism
    similar to what NFSv4 has, so that you can force other users to relookup
    after you revoked a key. That complicates the use a lot though.

    Also the model depends on good secure random numbers, which is questionable
    in many environments (e.g. a diskless box where the random device effectively
    gets no new input)

    -Andi

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

    \
     
     \ /
      Last update: 2005-03-22 13:14    [W:0.020 / U:60.588 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site