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Re: an ethereum ECDSA-difficulty

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From	Richard Kettlewell <invalid@invalid.invalid>
Newsgroups	comp.programming
Subject	Re: an ethereum ECDSA-difficulty
Date	Fri, 29 Jan 2021 13:31:05 +0000
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Boris Dorestand <bdorestand@example.com> writes:
> The nonce is 1, the gas price is 20 gwei, the maximum gas units is
> 21000, the to-address is correct, the amount is 1 ether = 10^18 wei, the
> data payload is empty, the v value of the signature is 46, as I intended
> and the r, s values of the signature are precisely those I intended to
> encode.  Everything looks perfectly as it should.
>
> --8<---------------cut here---------------start------------->8---
> out.rkt> r
> 30190652438768558380735263684943397541547868147655542157485309011183437025247
> out.rkt> s
> 93620689063899170013813414230496747665687050654128603934107115817203536307811
> --8<---------------cut here---------------end--------------->8---

That does not meet Ethereum’s signature canonicalization requirements.

    $ python3
    Python 3.7.3 (default, Jul 25 2020, 13:03:44) 
    [GCC 8.3.0] on linux
    Type "help", "copyright", "credits" or "license" for more information.
    >>> n=115792089237316195423570985008687907852837564279074904382605163141518161494337
    >>> r=30190652438768558380735263684943397541547868147655542157485309011183437025247
    >>> s=93620689063899170013813414230496747665687050654128603934107115817203536307811
    >>> s<(n//2)+1
    False
    >>> 

See https://files.gitter.im/ethereum/yellowpaper/VIyt/Paper.pdf (212), p21.

-- 
https://www.greenend.org.uk/rjk/

Thread

an ethereum ECDSA-difficulty Boris Dorestand <bdorestand@example.com> - 2021-01-28 16:35 -0300
  Re: an ethereum ECDSA-difficulty Richard Kettlewell <invalid@invalid.invalid> - 2021-01-29 13:31 +0000
    Re: an ethereum ECDSA-difficulty Boris Dorestand <bdorestand@example.com> - 2021-01-29 13:06 -0300
  Re: an ethereum ECDSA-difficulty "Dirk T. Verbeek" <dverbeek@xs4all.nl> - 2021-01-30 18:10 +0100

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