Re: [Cfrg] I-D Action: draft-irtf-cfrg-chacha20-poly1305-00.txt

Yoav Nir <ynir.ietf@gmail.com> Tue, 05 August 2014 06:06 UTC

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From: Yoav Nir <ynir.ietf@gmail.com>
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Date: Tue, 5 Aug 2014 09:06:36 +0300
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To: Tim Whittington <cfrg@whittington.net.nz>
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Subject: Re: [Cfrg] I-D Action: draft-irtf-cfrg-chacha20-poly1305-00.txt
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Hi, Tim.

The original text (copied from some page Google turned up by searching for “Jabberwocky” is as follows:

'Twas brillig, and the slithy toves
Did gyre and gimble in the wabe:
All mimsy were the borogoves,
And the mome raths outgrabe.

The hex representation shows any non-printable character (code<32 or code>=127) as a period.
So only the last character in the test vector is an actual period.

Hope this helps

Yoav

On Aug 5, 2014, at 5:27 AM, Tim Whittington <cfrg@whittington.net.nz> wrote:

> I note that there is a repeated error in the HEX <-> ASCII conversion for the test vectors that use the phrase "'Twas brillig, and the slithy roves…”:
> - A.2, Test Vector #3
> - A.3, Test Vector #4
> 
> I can verify the test vectors using the hex plaintext, but this is not representative of the actual text.
> Specifically all but the last period (ASCII 0x2e) in the text are 0x0A in the hex representation.
> 
> The error is also in draft-nir-cfrg-chacha20-poly1305.
> 
> cheers
> tim
> 
> 
> 
> On 24/07/2014, at 9:34 am, internet-drafts@ietf.org wrote:
> 
>> 
>> A New Internet-Draft is available from the on-line Internet-Drafts directories.
>> This draft is a work item of the Crypto Forum Research Group Working Group of the IETF.
>> 
>>       Title           : ChaCha20 and Poly1305 for IETF protocols
>>       Authors         : Yoav Nir
>>                         Adam Langley
>> 	Filename        : draft-irtf-cfrg-chacha20-poly1305-00.txt
>> 	Pages           : 38
>> 	Date            : 2014-07-23
>> 
>> Abstract:
>>  This document defines the ChaCha20 stream cipher, as well as the use
>>  of the Poly1305 authenticator, both as stand-alone algorithms, and as
>>  a "combined mode", or Authenticated Encryption with Additional Data
>>  (AEAD) algorithm.
>> 
>>  This document does not introduce any new crypto, but is meant to
>>  serve as a stable reference and an implementation guide.
>> 
>> 
>> The IETF datatracker status page for this draft is:
>> https://datatracker.ietf.org/doc/draft-irtf-cfrg-chacha20-poly1305/
>> 
>> There's also a htmlized version available at:
>> http://tools.ietf.org/html/draft-irtf-cfrg-chacha20-poly1305-00
>> 
>> 
>> Please note that it may take a couple of minutes from the time of submission
>> until the htmlized version and diff are available at tools.ietf.org.
>> 
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>> 
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