Re: [TLS] Working Group Last Call for draft-ietf-tls-pwd

"Dan Harkins" <dharkins@lounge.org> Fri, 06 December 2013 18:29 UTC

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Date: Fri, 6 Dec 2013 10:29:22 -0800 (PST)
From: "Dan Harkins" <dharkins@lounge.org>
To: "CodesInChaos" <codesinchaos@gmail.com>
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Cc: "tls@ietf.org" <tls@ietf.org>
Subject: Re: [TLS] Working Group Last Call for draft-ietf-tls-pwd
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On Fri, December 6, 2013 3:14 am, CodesInChaos wrote:
> On Thu, Dec 5, 2013 at 6:15 PM, Dan Harkins <dharkins@lounge.org> wrote:
>>   No, that's not really true.  There is a difference between "your
>> protocol has
>> not been proven secure" and "your protocol has a security flaw". And
>> while
>> the former has been pointed out on this list and the CFRG list, the
>> later
>> has not.
>
> How is using a password hash a hundred times weaker than md5crypt not
> considered a security flaw?

  It's not. A password hash that's 100x weaker than md5crypt would be a
security flaw.

> Database compromises happen all the time, and forcing the server to
> store a weakly hashed password
> isn't acceptable IMO.

  You're absolutely right, that would not be acceptable.

  TLS-pwd uses HMAC-SHA256 with a 32 byte random key (salt) to
hash passwords that the server stores.

  Dan.