Subject: Re: [Cfrg] [Errata Verified] RFC8439 (5689)

From: Megan Ferguson <[email-masked]>
Date: Thu, 13 Jun 2019 19:30:15 -0700

Hi Colin,

We note that erratum 5689 seems to be a corrected version of erratum 5675.  As much as possible, we try to avoid errata for errata.  
May we delete 5675 and remove the “Verifier nNte” from 5689?  

Please note that once you change the status of an erratum out of “Reported”, you lose access to the report.  
However, at your request, we will set the status back to “Reported” so you can update the entry as needed.  

Thanks.

RFC Editor/mf

On Apr 15, 2019, at 3:54 AM, RFC Errata System <[email-masked]> wrote:

> The following errata report has been verified for RFC8439,
> "ChaCha20 and Poly1305 for IETF Protocols". 
> 
> --------------------------------------
> You may review the report below and at:
> http://www.rfc-editor.org/errata/eid5689
> 
> --------------------------------------
> Status: Verified
> Type: Technical
> 
> Reported by: Stefan Heiss <[email-masked]>
> Date Reported: 2019-04-11
> Verified by: Colin Perkins (IRSG)
> 
> Section: 2.5.1
> 
> Original Text
> -------------
> for i=1 upto ceil(msg length in bytes / 16)
>   n = le_bytes_to_num(msg[((i-1)*16)..(i*16)] | [0x01])
>   a += n
>   a = (r * a) % p
>   end
> 
> 
> Corrected Text
> --------------
> for i=1 upto ceil(msg length in bytes / 16)
>   j = min(i*16-1, msg length in bytes - 1)
>   n = le_bytes_to_num(msg[((i-1)*16)..j] | [0x01])
>   a += n
>   a = (r * a) % p
>   end
> 
> 
> Notes
> -----
> Correction of Errata 5675
> 
> --------------------------------------
> RFC8439 (draft-nir-cfrg-rfc7539bis-04)
> --------------------------------------
> Title               : ChaCha20 and Poly1305 for IETF Protocols
> Publication Date    : June 2018
> Author(s)           : Y. Nir, A. Langley
> Category            : INFORMATIONAL
> Source              : Crypto Forum Research Group
> Area                : N/A
> Stream              : IRTF
> Verifying Party     : IRSG
>