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    SubjectRe: [RFC][Patch 5/5]integrity: IMA as an integrity service provider
    On Wed 2008-05-28 01:22:42, Andrew Morton wrote:
    > On Fri, 23 May 2008 11:05:45 -0400 Mimi Zohar <zohar@linux.vnet.ibm.com> wrote:
    >
    > > This is a re-release of Integrity Measurement Architecture(IMA) as an
    > > independent Linunx Integrity Module(LIM) service provider, which implements
    > > the new LIM must_measure(), collect_measurement(), store_measurement(), and
    > > display_template() API calls. The store_measurement() call supports two
    > > types of data, IMA (i.e. file data) and generic template data.
    ...
    > Generally: the code is all moderately intrusive into the VFS and this
    > sort of thing does need careful explanation and justification, please.
    > Once we have some understanding of what you're trying to achieve here
    > we will inevitably ask "can't that be done in userspace". So it would
    > be best if your description were to preemptively answer all that.

    ...also, it would be nice to see explanation 'what is this good for'.

    Closest explanation I remember was 'it will protect you by making
    system unbootable if someone stole disk with your /usr filesystem --
    but not / filesystem -- added some rootkit, and then stealthily
    returned it'. That seems a) very unlikely scenario and b) probably
    better solved by encrypting /usr.
    Pavel
    --
    (english) http://www.livejournal.com/~pavelmachek
    (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html


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