would not storing uid range on sdcard itself be a security risk?

Fred Grott
http://mobilebytes.wordpress.com

On Wed, Aug 12, 2009 at 3:57 PM, lbcoder <[email protected]> wrote:

>
> Apps on different sdcards requesting the same uid:
> set aside a uid range for sdcard-only use and keep the uid database
> for that range stored on the sdcard along with apk, dalvik cache, and
> home directory. Then it doesn't matter if different apps on different
> sdcards request the same uid. You can never have a conflict with
> internal uids since they are from different and mutually exclusive
> ranges, and you can never have a conflict between uids on different
> sdcards since the programs can never be present simultaneously.
>
> Factory reset should not affect sdcard at all, as it does currently,
> it should just wipe the /data internal partition. Could also give an
> option "would you also like to wipe the sdcard <y/n>?", otherwise just
> leave the sdcard wiping to formatting.
>
>
> > (7) About apps on removable storage:
> >
> > Yup, that's a painful part. We (Google) have felt that pain even
> > before the G1 was released, as even our handful of test apps wouldn't
> > fit on the internal storage of a Dream. This is one of those areas
> > where there's always been some higher priority work for the Google
> > Android engineers who know that area of the code (see my comment above
> > about decisions and commitments not being made by engineers). There
> > have been quite a few discussions about this on open-source lists, but
> > those barely scratched the surface beyond the equivalent of "works for
> > me" and didn't seem to get into the meat of the problem (making it
> > work fully is a surprisingly deep issue). The right group to discuss
> > this is android-platform. Be prepared to think about what happens e.g.
> > when two apps are installed on two separate SD cards but request the
> > same UID, or about the way to deal with a factory reset.
> >
>

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