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Re: [sipcore] Call for WG adoption: draft-yusef-sipcore-digest-scheme

Rifaat Shekh-Yusef <rifaat.ietf@gmail.com> Sat, 06 April 2019 18:32 UTC

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References: <38f783ca-00c1-9a34-a3f6-fc63c018e272@nostrum.com> <87pnq2h58x.fsf@hobgoblin.ariadne.com> <CAGL6epJwRMJpxO06GB5dSxfU=dqiXjkaW2ytgHOStt2t0d0ZQg@mail.gmail.com> <7F5A8856-4127-45FC-ACD9-6AF191535774@brianrosen.net>
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From: Rifaat Shekh-Yusef <rifaat.ietf@gmail.com>
Date: Sat, 06 Apr 2019 14:31:49 -0400
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To: Brian Rosen <br@brianrosen.net>
Cc: "Dale R. Worley" <worley@ariadne.com>, SIPCORE <sipcore@ietf.org>
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Subject: Re: [sipcore] Call for WG adoption: draft-yusef-sipcore-digest-scheme
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It will be very difficult to enforce this, as a downgrade attack will
always be possible unless a secure mechanism to identify the client is
being used.
I will add some text to cover this.

Regards,
 Rifaat


On Fri, Apr 5, 2019 at 2:08 PM Brian Rosen <br@brianrosen.net> wrote:

> <as individual>
> Consider adding text saying that MD5 is not deprecated by this document
> but its use is restricted to older devices and when communicating with
> newer devices SHA MUST be used.
>
> Brian
>
> On Apr 5, 2019, at 9:08 AM, Rifaat Shekh-Yusef <rifaat.ietf@gmail.com>
> wrote:
>
> Hi Dale,
>
> The document does not require the removal of MD5 support because it is
> needed for backward compatibility.
>
> Regards,
>  Rifaat
>
>
>
> On Wed, Apr 3, 2019 at 10:30 PM Dale R. Worley <worley@ariadne.com> wrote:
>
>> > On 01/04/2019, 23.46, A. Jean Mahoney wrote:
>> >     This is a call for adoption of draft-yusef-sipcore-digest-scheme in
>> the
>> >     SIPCORE working group.
>> >
>> >     https://datatracker.ietf.org/doc/draft-yusef-sipcore-digest-scheme/
>>
>> I favor adopting draft-yusef-sipcore-digest-scheme.
>>
>> (Editorial:  The Abstract needs revision.  As far as I can tell, the
>> general idea is to have MD5 be replaced by SHA-256 in general usage.
>> But the specifics are that the document adds both SHA-256 and
>> SHA-512-256 and does not remove MD5.)
>>
>> Dale
>>
>> _______________________________________________
>> sipcore mailing list
>> sipcore@ietf.org
>> https://www.ietf.org/mailman/listinfo/sipcore
>>
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