Re: [stir] Proposal for update of erratum #6519 - ppt syntax

Marc Petit-Huguenin <marc@petit-huguenin.org> Thu, 22 April 2021 16:11 UTC

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To: Christer Holmberg <christer.holmberg@ericsson.com>, Roman Shpount <roman@telurix.com>, Russ Housley <housley@vigilsec.com>
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From: Marc Petit-Huguenin <marc@petit-huguenin.org>
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Date: Thu, 22 Apr 2021 09:11:34 -0700
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Subject: Re: [stir] Proposal for update of erratum #6519 - ppt syntax
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This was shorthand for 1) I disagree to everything you said, but I have nothing to add to what I already said and 2) I want to signal to whoever is deciding consensus that I disagree.

On 4/22/21 7:37 AM, Christer Holmberg wrote:
> No what?
> 
> ________________________________
> From: Marc Petit-Huguenin <marc@petit-huguenin.org>
> Sent: Thursday, April 22, 2021 12:34 AM
> To: Christer Holmberg <christer.holmberg@ericsson.com>om>; Roman Shpount <roman@telurix.com>om>; Russ Housley <housley@vigilsec.com>
> Cc: IETF STIR Mail List <stir@ietf.org>
> Subject: Re: [stir] Proposal for update of erratum #6519 - ppt syntax
> 
> No.
> 
> On 4/21/21 12:40 PM, Christer Holmberg wrote:
>>>> I have not been able to follow the discussion in detail, but is there a reason why we simply can's say:
>>>>
>>>> ident-type = "ppt" EQUAL token / quoted-string
>>>>
>>>> ...and then add text saying that the only token characters are allowed?
>>>
>>> I believe that exceptions to ABNF should be kept to the minimal necessary.
>>
>> My suggestion is a subset of generic-param, which is the generic syntax for the parameters.
>>
>>> Few implementers read the ABNF, few implementers read normative text.  That means that only the intersection of these two sets will do the right thing.
>>>
>>> That's also why we should not deviate from the norm:  We should have used COMMA in Identity, ident-info-uri should have been a field right after signed->identity-digest (similar to name-addr).
>>
>> Perhaps, but that is not what the issue is about.
>>
>> Regards,
>>
>> Christer
>>
>>
>>>
>>>
>>>
>>> ________________________________
>>> From: Roman Shpount <roman@telurix.com>
>>> Sent: Tuesday, April 20, 2021 5:20 PM
>>> To: Russ Housley <housley@vigilsec.com>
>>> Cc: Marc Petit-Huguenin <marc@petit-huguenin.org>rg>; Christer Holmberg <christer.holmberg@ericsson.com>om>; IETF STIR Mail List <stir@ietf.org>
>>> Subject: Re: [stir] Proposal for update of erratum #6519
>>>
>>> Hi Russ,
>>>
>>> The complete grammar would be:
>>>
>>>          Identity = "Identity" HCOLON signed-identity-digest SEMI
>>>              ident-info *( SEMI ident-info-params )
>>>          signed-identity-digest = 1*(base64url-char / ".")
>>>          ident-info = "info" EQUAL ident-info-uri
>>>          ident-info-uri = LAQUOT absoluteURI RAQUOT
>>>          ident-info-params = ident-info-alg / ident-type /
>>>              ident-info-extension
>>>          ident-info-alg = "alg" EQUAL token
>>>          ident-type =  "ppt" EQUAL ( token / ( LDQUOT token RDQUOT ) )
>>>          ident-info-extension = generic-param
>>>
>>> base64url-char = ALPHA / DIGIT / "-" / "_"
>>>
>>> In this grammar, SEMI is defined as SEMI = SWS  ";"  SWS. This should take care of the SWS after the token.
>>> _____________
>>> Roman Shpount
>>>
>>>
>>> On Tue, Apr 20, 2021 at 9:22 AM Russ Housley <housley@vigilsec.com<mailto:housley@vigilsec.com>> wrote:
>>>
>>>
>>> On Apr 19, 2021, at 9:57 PM, Roman Shpount <roman@telurix.com<mailto:roman@telurix.com>> wrote:
>>>
>>> ident-type = "ppt" EQUAL ( token / ( LDQUOT token RDQUOT ) )
>>>
>>> Since RDQUOT allows whitespace after the double quote, do we need to allow whitespace after token when there are no quotes?
>>>
>>>        ident-type = "ppt" EQUAL ( ( token SWS ) / ( LDQUOT token RDQUOT ) )
>>>
>>> Russ
>>>
>>
>>
>> --
>> Marc Petit-Huguenin
>> Email: marc@petit-huguenin.org
>> Blog: https://protect2.fireeye.com/v1/url?k=f5436fb7-aad856b2-f5432f2c-86959e472243-d9535674738af26e&q=1&e=7a194cb8-6230-48c3-b23f-d2e231acea1c&u=https%3A%2F%2Fmarc.petit-huguenin.org%2F
>> Profile: https://www.linkedin.com/in/petithug
>>
> 
> 
> --
> Marc Petit-Huguenin
> Email: marc@petit-huguenin.org
> Blog: https://protect2.fireeye.com/v1/url?k=3c808f74-631bb671-3c80cfef-86d2114eab2f-c675e5fca897c209&q=1&e=ff81ea56-63b5-4201-94e2-6d0158073ba1&u=https%3A%2F%2Fmarc.petit-huguenin.org%2F
> Profile: https://www.linkedin.com/in/petithug
> 


-- 
Marc Petit-Huguenin
Email: marc@petit-huguenin.org
Blog: https://marc.petit-huguenin.org
Profile: https://www.linkedin.com/in/petithug