Re: [OAUTH-WG] Transaction Authorization with OAuth

Torsten Lodderstedt <torsten@lodderstedt.net> Thu, 25 April 2019 17:54 UTC

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From: Torsten Lodderstedt <torsten@lodderstedt.net>
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Date: Thu, 25 Apr 2019 19:54:47 +0200
Cc: Sascha Preibisch <saschapreibisch@gmail.com>, oauth <oauth@ietf.org>
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To: George Fletcher <gffletch@aol.com>
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Subject: Re: [OAUTH-WG] Transaction Authorization with OAuth
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> Am 25.04.2019 um 17:03 schrieb George Fletcher <gffletch@aol.com>:
> 
> A couple of thoughts...
> 
> 1. It doesn't feel like these are scopes (at least not as scope is defined by RFC 6749). It feels like they are more transaction requirements.

What’s the difference? In my opinion, if you authorize a transaction it’s the same. Moreover, in other use cases (account information) it a complex requirement for a potentially long lasting grant.

In both cases, they describe the request power of the token == it’s scope.

> 
> 2. The schemas are going to be very ecosystem specific, correct?

API (e.g. all psd2 standards), ecosystem, single deployment - just like „traditional“ scope values

> 
>> On 4/24/19 1:08 PM, Torsten Lodderstedt wrote:
>> Hi Sascha,
>> 
>> I see. I assume every element within the structured scope element to be an independent scope (value) object and intended to use the name of that object as kind of content type definition. 
>> 
>> In my last example, the scope is defined as 
>> 
>>    "structured_scope":{  
>>       "sign":{  
>>          "credentialID":"qes_eidas",
>>          "documentDigests":[  
>>             {  
>>                "hash":
>>                  "sTOgwOm+474gFj0q0x1iSNspKqbcse4IeiqlDg/HWuI=",
>>                "label":"Mobile Subscription Contract"
>>             }
>>          ],
>>          "hashAlgorithmOID":"2.16.840.1.101.3.4.2.1"
>>       },
>>       "payment":{  
>>          "type":"sepa-credit-transfer",
>>          "instructedAmount":{  
>>             "currency":"EUR",
>>             "amount":"123.50"
>>          },
>>          "debtorAccount":{  
>>             "iban":"DE40100100103307118608"
>>          },
>>          "creditorName":"Merchant123",
>>          "creditorAccount":{  
>>             "iban":"DE02100100109307118603"
>>          },
>>          "remittanceInformationUnstructured":"new Smartphone"
>>       }
>> 
>> This means ???sign" and ???payment" would determine the scheme of the respective object. 
>> 
>> What do you think?
>> 
>> best regards, 
>> Torsten. 
>> 
>>>> On 23. Apr 2019, at 17:14, Sascha Preibisch <saschapreibisch@gmail.com> wrote:
>>>> 
>>>> Hi Torsten!
>>>> 
>>>> If 'structured_scope' would become a generic field for application
>>>> specific content, I believe an indicator for the type of content would
>>>> be needed on the long run. That is what I meant my 'profile'. I hope
>>>> this helps!
>>>> 
>>>> Thank you,
>>>> Sascha
>>>> 
>>>> Am Mo., 22. Apr. 2019 um 22:06 Uhr schrieb Torsten Lodderstedt
>>>> <torsten@lodderstedt.net>:
>>>> Hi Sascha,
>>>> 
>>>>>> Am 22.04.2019 um 20:34 schrieb Sascha Preibisch <saschapreibisch@gmail.com>:
>>>>>> 
>>>>>> Thank you for the article, Torsten!
>>>>> my pleasure :-)
>>>>> 
>>>>> I like that 'scope' is out of the game for these kinds of authorizations.
>>>>> 
>>>>> What I can see for the general use case is a required identifier
>>>>> within the 'structures_scope' document that identifies the profile it
>>>>> should be used for.
>>>> What does profile mean in this context?
>>>> 
>>>> best regards,
>>>> Torsten.
>>>>> Thank you,
>>>>> Sascha
>>>>> 
>>>>> Am Sa., 20. Apr. 2019 um 11:21 Uhr schrieb Torsten Lodderstedt
>>>>> <torsten@lodderstedt.net>:
>>>>>> Hi all,
>>>>>> 
>>>>>> I just published an article about the subject at: https://medium.com/oauth-2/transaction-authorization-or-why-we-need-to-re-think-oauth-scopes-2326e2038948
>>>>>> 
>>>>>> I look forward to getting your feedback.
>>>>>> 
>>>>>> kind regards,
>>>>>> Torsten.
>>>>>> _______________________________________________
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