From: Hans Petter Selasky <hps@selasky.org>
To: Konstantin Ryabitsev <konstantin@linuxfoundation.org>
Cc: rsbecker@nexbridge.com, git@vger.kernel.org
Subject: Re: Gitorious should use CRC128 / 256 / 512 instead of SHA-1
Date: Fri, 13 Jan 2023 17:30:20 +0100 [thread overview]
Message-ID: <95797daa-4d5d-73d3-fec5-6b25707182fd@selasky.org> (raw)
In-Reply-To: <20230113162721.qwl2asjo542cxe3c@meerkat.local>
On 1/13/23 17:27, Konstantin Ryabitsev wrote:
> The answer is, unhelpfully, "because that's how git works." Every commit is a
> standalone object that references the previous commit, plus includes hashes of
> all trees, and those include hashes of all blobs. SHA-1 was picked because of
> its speed and the fact that it guarantees an extremely low potential for
> collisions (even better with SHA256). As a side-effect, it's easy to calculate
> the integrity of the entire tree, including its history, by verifying its
> hashes (this is what git fsck does).
Same thing can be said for CRC-XXX. Just some magic CPU instructions and
we're good. You don't even need a library.
--HPS
next prev parent reply other threads:[~2023-01-13 16:36 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-13 12:59 Gitorious should use CRC128 / 256 / 512 instead of SHA-1 Hans Petter Selasky
2023-01-13 13:30 ` Konstantin Khomoutov
2023-01-13 13:39 ` Hans Petter Selasky
2023-01-13 14:21 ` rsbecker
2023-01-13 14:42 ` Hans Petter Selasky
2023-01-13 15:45 ` Konstantin Ryabitsev
2023-01-13 15:50 ` Hans Petter Selasky
2023-01-13 15:56 ` rsbecker
2023-01-13 16:02 ` Hans Petter Selasky
2023-01-13 15:54 ` Hans Petter Selasky
2023-01-13 16:02 ` Konstantin Ryabitsev
2023-01-13 16:06 ` Hans Petter Selasky
2023-01-13 16:18 ` Hans Petter Selasky
2023-01-13 16:36 ` Konstantin Ryabitsev
2023-01-13 16:44 ` Hans Petter Selasky
2023-01-13 16:49 ` Konstantin Ryabitsev
2023-01-13 16:51 ` Hans Petter Selasky
2023-01-13 16:27 ` Konstantin Ryabitsev
2023-01-13 16:30 ` Hans Petter Selasky [this message]
2023-01-13 16:35 ` Hans Petter Selasky
2023-01-13 16:41 ` Konstantin Ryabitsev
2023-01-13 16:45 ` Hans Petter Selasky
2023-01-13 15:15 ` Hans Petter Selasky
2023-01-13 17:44 ` Philip Oakley
2023-01-13 15:30 ` Konstantin Khomoutov
2023-01-13 15:39 ` Konstantin Ryabitsev
2023-01-13 13:23 Hans Petter Selasky
2023-01-14 23:59 ` brian m. carlson
2023-01-15 3:14 ` Junio C Hamano
2023-01-15 10:09 ` demerphq
2023-01-16 7:21 ` Hans Petter Selasky
2023-01-16 7:23 ` Hans Petter Selasky
2023-01-16 12:34 ` rsbecker
2023-01-16 14:01 ` Hans Petter Selasky
2023-01-16 15:06 ` Junio C Hamano
2023-01-15 13:53 ` Michal Suchánek
2023-01-16 7:17 ` Hans Petter Selasky
2023-01-16 9:13 ` Michal Suchánek
2023-01-16 9:55 ` Hans Petter Selasky
2023-01-16 12:31 ` rsbecker
2023-01-16 14:10 ` Hans Petter Selasky
2023-01-16 19:08 ` Michal Suchánek
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=95797daa-4d5d-73d3-fec5-6b25707182fd@selasky.org \
--to=hps@selasky.org \
--cc=git@vger.kernel.org \
--cc=konstantin@linuxfoundation.org \
--cc=rsbecker@nexbridge.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).