Re: [OAUTH-WG] Barry Leiba's No Objection on draft-ietf-oauth-token-exchange-18: (with COMMENT)

[Brian Campbell <[e-mail]>]

That works for me.

On Sat, Jul 20, 2019 at 10:28 PM Benjamin Kaduk <[e-mail]> wrote:

> On Fri, Jul 19, 2019 at 10:05:57AM -0600, Brian Campbell wrote:
> > On Fri, Jul 19, 2019 at 8:31 AM Barry Leiba <[e-mail]>
> wrote:
> >
> > >
> > > >> — Section 1.1 —
> > > >> Given the extensive discussion of impersonation here, what strikes
> me as
> > > >> missing is pointing out that impersonation here is still controlled,
> > > that “A is
> > > >> B” but only to the extent that’s allowed by the token.  First, it
> might
> > > be
> > > >> limited by number of instances (one transaction only), by time of
> day
> > > (only for
> > > >> 10 minutes), and by scope (in regard to B’s address book, but not
> B’s
> > > email).
> > > >> Second, there is accountability: audit information still shows that
> the
> > > token
> > > >> authorized acting as B.  Is that not worth clarifying?
> > > >
> > > > My initial response was going to be "sure, I'll add some bits in sec
> 1.1
> > > along those lines to clarify
> > > > that." However, as I look again at that section for good
> opportunities
> > > to make such additions, I feel
> > > > like it is already said that impersonation is controlled.
> > > ...
> > > > So I think it already says that and I'm gonna have to flip it back
> and
> > > ask if you have concrete
> > > > suggestions for changes or additions that would say it more clearly
> or
> > > more to your liking?
> > >
> > > It is mentioned, true, and that might be enough.  But given that Eve
> > > also replied that she would like more here, let me suggest something,
> > > the use of which is entirely optional -- take it, don't take it,
> > > modify it, riff on it, ignore it completely, as you think best.  What
> > > do you think about changing the last sentence of the paragraph?: "For
> > > all intents and purposes, when A is impersonating B, A is B within the
> > > rights context authorized by the token, which could be limited in
> > > scope or time, or by a one-time-use restriction."
> > >
> >
> > Sure, I think that or some slight modification thereof can work just
> fine.
> > I'll do that and get it and the rest of these changes published when the
> > I-D submission embargo is lifted for Montreal.
>
> My brain is apparntly storming and not sleeping.  Another option for
> consideration, is to have two sentences:
>
> For all intents and purposes, when A is impersonating B, A is B within the
> rights context authorized by the token.  A's ability to impersonate B could
> be limited in scope or time, or even with a one-time-use restriction,
> whether via the contents of the token or an out-of-band mechanism.
>
> -Ben
>

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