You can already sign arbitrary content using a body hash with the current spec.

 — Justin

> On Oct 24, 2016, at 8:38 AM, Phil Hunt (IDM) <phil.h...@oracle.com> wrote:
> 
> Maybe if we reworked the signing doc so content types like xml and json could 
> be signed?  
> 
> This would cover for the majority of web api cases. 
> 
> Wonder what the advice of the http wg would be on this. 
> 
> Phil
> 
> On Oct 24, 2016, at 8:29 AM, Samuel Erdtman <sam...@erdtman.se 
> <mailto:sam...@erdtman.se>> wrote:
> 
>> +1 on doing PoP work in this working group, including HTTP signing/MACing, I 
>> don´t think the old HTTP signature document was that far from useful.
>> 
>> With the ACE work I like when it is possible to just map work done in the 
>> OAuth and other working groups to the more optimized protocols. Some would 
>> maybe say that it is sub-optimal that the protocol was not initially 
>> designed for the constrained environment but I think the benefit of concept 
>> validation from web is a bigger plus.
>> 
>> //Samuel
>> 
>> On Sat, Oct 22, 2016 at 7:47 PM, Justin Richer <jric...@mit.edu 
>> <mailto:jric...@mit.edu>> wrote:
>> I believe that the PoP work should stay in the working group, and that 
>> without a usable presentation mechanism such as an HTTP message signature 
>> the whole work is pointless. I agree with Mike that we should learn from our 
>> own mistakes — and that is precisely the direction that the current HTTP 
>> signing draft took. As a result, the base level of functionality is signing 
>> the token itself (with a timestamp/nonce) using the key. All of the fiddly 
>> HTTP bits that trip people up? Not only are they optional, but it’s 
>> explicitly declared what’s covered. Why? Because we’re learning from past 
>> mistakes.
>> 
>> I think that token binding is relying on a lot of “ifs” that aren’t real 
>> yet, and if those “ifs” become reality then it will be to the benefit of 
>> large internet companies over everyone else. Additionally, token binding in 
>> OAuth is far from the simple solution that it’s being sold as. The very 
>> nature of an access token goes against the original purpose of tying an 
>> artifact to a single presentation channel. OAuth clients in the real world 
>> need to be able to deal with multiple resource servers and dynamically 
>> deployed APIs, and the token binding protocol fundamentally assumes a world 
>> where two machines are talking directly to each other.
>> 
>> All that said, this working group has consistently shown resistance to 
>> solving this problem for many years, so the results of this query don’t at 
>> all surprise me.
>> 
>>  — Justin
>> 
>> > On Oct 19, 2016, at 11:45 AM, Hannes Tschofenig <hannes.tschofe...@gmx.net 
>> > <mailto:hannes.tschofe...@gmx.net>> wrote:
>> >
>> > Hi all,
>> >
>> > two questions surfaced at the last IETF meeting, namely
>> >
>> > 1) Do we want to proceed with the symmetric implementation of PoP or,
>> > alternatively, do we want to move it over to the ACE working group?
>> >
>> > 2) Do we want to continue the work on HTTP signing?
>> >
>> > We would appreciate your input on these two questions.
>> >
>> > Ciao
>> > Hannes & Derek
>> >
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>> 
>> 
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>> 
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