Subject: Re: [AVT] possible error on testvectors of draft "draft-ietf-avt- srtp-08.txt"

From: "Karl Norrman (KI/EAB)" <[email-masked]>
Date: Wed, 13 Aug 2003 10:51:38 +0200

Hello,

As Claudio Thomas points out, there is an error in the test-vectors for
f8-mode present in the draft. To aid implementors of f8-mode we would
like to make more test-vectors available. It would be nice if anyone
with an implementation could verify the test-vectors retrievable
through this link: http://standards.ericsson.net/fli/drafts.html 
Our intention is to incorporate a reference to these in the next version.

Regards,
Karl

> Actual link: <http://www.ietf.org/internet-drafts/draft-ietf-avt-srtp-08.txt> >http://www.ietf.org/internet-drafts/draft-ietf-avt-srtp-08.txt
> 
> 
> Chapter B.1 AES-f8 Test Vectors (page 52)
> 
> 
> Position: j=2
> 
> 
> IV' XOR j : 595b699bbd3bc0df26062093c1ad8f70
> 
> Should be
> 
> IV' XOR j : 595b699bbd3bc0df26062093c1ad8f71
> 
> 
> Reason:
> 
> Last byte of IV' = 73, j=02: 73 xor 02 = 71 (0011 xor 0010 = 0001)
> 
> 
> If my calculator is right, then the values after this position also can't be correct.
> 
> 
> Do someone have already implemented it to give me working vextors? Or can somebody explain me >what is wrong on my calc?
> 
> 
> Thanks,
> 
> 
> Claudio

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