From: Hongyi Zhao <hongyi.zhao@gmail.com>
To: Emanuel Berg <moasenwood@zoho.eu>,
help-gnu-emacs <help-gnu-emacs@gnu.org>
Subject: Re: Search through the string's space for find the target string whose md5sum matches the required condition.
Date: Wed, 13 Oct 2021 10:29:45 +0800 [thread overview]
Message-ID: <CAGP6POK4CDVykgXMGWexNo2GMLqNW22NtS2e8Cs=_rU3sew2qw@mail.gmail.com> (raw)
In-Reply-To: <87tuhmwfxj.fsf@zoho.eu>
On Tue, Oct 12, 2021 at 9:13 PM Emanuel Berg via Users list for the
GNU Emacs text editor <help-gnu-emacs@gnu.org> wrote:
>
> Hongyi Zhao wrote:
>
> > import re
> > from hashlib import md5
> > from string import ascii_uppercase
> >
> > alphabet_uppercase = ascii_uppercase
> > re_md5_str = re.compile(r"""^E903[A-F0-9]{3}
> > 4DAB[A-F0-9]{4}
> > 08[A-F0-9]{5}
> > 51[A-F0-9]
> > 80[A-F0-9]{2}
> > 8A[A-F0-9]""", re.X)
> >
> > for i in alphabet_uppercase:
> > i_str = 'TASC' + i
> > for j in alphabet_uppercase:
> > j_str = i_str + 'O3RJMV' + j
> > for k in alphabet_uppercase:
> > _str = j_str + 'WDJKX' + k + 'ZM'
> > md5_str = md5(_str.encode('utf-8')).hexdigest().upper()
> > if re_md5_str.match(md5_str):
> > print('string: ' + _str + '\n' + 'md5sum: ' + md5_str)
>
> Python ... ugly but efficient.
>
> Lisp ... wonderful but ... yeah, to some extent.
Bash based UNIX tool one line solution:
$ for i in TASC{A..Z}O3RJMV{A..Z}WDJKX{A..Z}ZM;
do
echo $i; echo -n $i | md5sum | cut -d ' ' -f1;
done | tr '[a-z]' '[A-Z]' |
egrep -m1 -B1 'E903[A-Z0-9]{3}4DAB[A-Z0-9]{4}08[A-Z0-9]{5}51[A-Z0-9]80[A-Z0-9]{2}8A[A-Z0-9]'
TASCJO3RJMVKWDJKXLZM
E9032994DABAC08080091151380478A2
> Now do it in Lisp and let's compare. But the biggest
> difference (aside for beauty) will be the time spent writing
> the code - an expert lisper and beginner/medium level Python
> programmer should spend a comparable amount of time :) - not
> time in execution.
>
> Then I include googling solutions ...
>
> The true expert does everything very rapidly. But who is
> a Lisp expert? I can think of one person on this list and it
> sure ain't me :)
>
> --
> underground experts united
> https://dataswamp.org/~incal
next prev parent reply other threads:[~2021-10-13 2:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-12 8:42 Search through the string's space for find the target string whose md5sum matches the required condition Hongyi Zhao
2021-10-12 9:39 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-10-12 11:45 ` Hongyi Zhao
2021-10-12 13:01 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-10-12 11:47 ` Hongyi Zhao
2021-10-12 13:06 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-10-13 2:29 ` Hongyi Zhao [this message]
2021-10-13 23:14 ` Emanuel Berg via Users list for the GNU Emacs text editor
2021-10-15 4:36 ` Hongyi Zhao
2021-10-15 7:19 ` Emanuel Berg via Users list for the GNU Emacs text editor
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