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[lamps] Re: AD comments on draft-ietf-lamps-dilithium-certificates

Viktor Dukhovni <ietf-dane@dukhovni.org> Fri, 02 May 2025 15:08 UTC

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Date: Sat, 03 May 2025 01:08:18 +1000
From: Viktor Dukhovni <ietf-dane@dukhovni.org>
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Subject: [lamps] Re: AD comments on draft-ietf-lamps-dilithium-certificates
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On Sat, May 03, 2025 at 12:40:24AM +1000, Viktor Dukhovni wrote:

> Where the issue is an extraneous parenthesis after "ctx", the correct
> version is:
> 
>     mu = H(BytesToBits(H(pk, 64) || IntegerToBytes(0, 2)) IntegerToBytes(|ctx|, 1) || ctx || M, 64)

As with many corrections, the above is also in error, the correct version is:

    mu = H(BytesToBits(H(pk, 64) || IntegerToBytes(0, 1) || IntegerToBytes(|ctx|, 1) || ctx) || M, 64)

Much of this in aid of maintaining the illusion that we hash bit strings
that are not an integral number of bytes.

-- 
    Viktor.

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