Re: [TLS] Updated TLS 1.2 I-D

Eric Rescorla <ekr@networkresonance.com> Tue, 27 June 2006 14:51 UTC

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To: "Anyang Ren" <anyang.ren@gmail.com>
Subject: Re: [TLS] Updated TLS 1.2 I-D
References: <20060625170241.E4704222425@laser.networkresonance.com> <39932b4c0606270721v19ecbed6j5fe129a42a99f106@mail.gmail.com> <86d5cu7k2h.fsf@raman.networkresonance.com> <39932b4c0606270744w21527b03ob884212d0e05c8ff@mail.gmail.com>
From: Eric Rescorla <ekr@networkresonance.com>
Date: Tue, 27 Jun 2006 07:51:27 -0700
In-Reply-To: <39932b4c0606270744w21527b03ob884212d0e05c8ff@mail.gmail.com> (Anyang Ren's message of "Tue, 27 Jun 2006 07:44:00 -0700")
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"Anyang Ren" <anyang.ren@gmail.com>; writes:

> On 6/27/06, Eric Rescorla <ekr@networkresonance.com>; wrote:
>> "Anyang Ren" <anyang.ren@gmail.com>; writes:
>>
>> > Are you going to replace the MD5/SHA-1 combination in the
>> > verify_data field of the Finished message?
>>
>> It's already done. The PRF is used to create the verify_data.
>
> I was referring to the definition of verify_data in Section 7.4.10.
> Finished on page 65:
>
>        struct {
>            opaque verify_data[12];
>        } Finished;
>
>        verify_data
>            PRF(master_secret, finished_label, MD5(handshake_messages) +
>            SHA-1(handshake_messages)) [0..11];
>
> The input to the PRF still contains the concatenation of MD5 and SHA-1 hashes.

No, we're going to feed in the handshake messages directly. I just
forgot to change that.

-Ekr

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