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From: John Bradley <ve7jtb@ve7jtb.com>
In-Reply-To: <56A8FA46.60807@gmail.com>
Date: Thu, 28 Jan 2016 09:17:23 -0300
Message-Id: <68C4E8AC-7C1F-411D-83B9-7C8A0A82FB94@ve7jtb.com>
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To: Sergey Beryozkin <sberyozkin@gmail.com>
Archived-At: <http://mailarchive.ietf.org/arch/msg/oauth/VtrfI9ZabMIiOI0yG1NMFqsRL3k>
Cc: "<oauth@ietf.org>" <oauth@ietf.org>
Subject: Re: [OAUTH-WG] Can the repeated authorization of scopes be avoided ?
Precedence: list


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Some people want exactly that behaviour.  If the user approves scope A =
on device a and scope B on device b, they want both to have scopes A & =
B.

Given that many AS are custom built for a specific service this can work =
for them.   It really depends on the API/Service what policy you want. =20=


When doing a generic library if it is not selectable someone will =
complain because they wanted it the other way.

Personally I don=E2=80=99t like that approach but perhaps people like =
twitter etc know better.

John B.

> On Jan 27, 2016, at 2:11 PM, Sergey Beryozkin <sberyozkin@gmail.com> =
wrote:
>=20
> Hi George
>=20
> Thanks. I think I'll need to spend more time on thinking about the way =
it has to be implemented, but I guess one thing I realize is that using =
only access tokens as records for this purpose is not ideal/generic.
>=20
> That said, it is not clear to me that a per-instance level consent =
makes sense only when the dynamic registration is used.
>=20
> Suppose we have a statically registered client, with the client id =
shared between 100 devices or even confidential clients. I'm actually =
not sure how realistic it is that the same user works with more than one =
device sharing the same id, but assuming it is possible sometimes, and =
further, with incremental authentication in place,
>=20
> we can have a situation where while working on device1 a user has =
approved 'a' while on device2 - scope "b", with both devices sharing the =
same client id.
>=20
> May be I'm making it too complex :-)
>=20
> Thanks, Sergey
>=20
> On 27/01/16 16:53, George Fletcher wrote:
>> My recommendation, like the others, is to store consent by
>> client_id:user and then try and leverage dynamic client registration =
if
>> instance level consent is needed.
>>=20
>> On 1/27/16 11:43 AM, George Fletcher wrote:
>>> Yes, I was thinking mostly of "native apps"... though you bring up a
>>> good point. It would be great if "installable" web apps could do
>>> dynamic client registration:)  I suppose for a "public" client that =
is
>>> loaded onto a device, the "installation" process could obtain a new
>>> client_id for that instance. Cookies might work, or have the app
>>> generate a unique identifier and use that in conjunction with the
>>> client_id?
>>>=20
>>> Thanks,
>>> George
>>>=20
>>> On 1/27/16 11:07 AM, Thomas Broyer wrote:
>>>>=20
>>>>=20
>>>> On Wed, Jan 27, 2016 at 1:54 PM George Fletcher <gffletch@aol.com
>>>> <mailto:gffletch@aol.com>> wrote:
>>>>=20
>>>>    The difference might be whether you want to store the scope
>>>>    consent by client "instance" vs client_id application "class".
>>>>=20
>>>>=20
>>>> Correct me if I'm wrong but this only makes sense for "native =
apps",
>>>> not for web apps, right?
>>>> (of course, now with "installable web apps" =E2=80=93e.g. =
progressive web
>>>> apps=E2=80=93, lines get blurry; any suggestion how you'd do it =
then? cookies?)
>>>=20
>>>=20
>>> _______________________________________________
>>> OAuth mailing list
>>> OAuth@ietf.org
>>> https://www.ietf.org/mailman/listinfo/oauth
>>=20
>=20
>=20
> --=20
> Sergey Beryozkin
>=20
> Talend Community Coders
> http://coders.talend.com/
>=20
> _______________________________________________
> OAuth mailing list
> OAuth@ietf.org
> https://www.ietf.org/mailman/listinfo/oauth


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