Gentoo Archives: gentoo-dev

From: Marek Szuba <marecki@g.o>
To: gentoo-dev@l.g.o
Subject: Re: [gentoo-dev] Switching default password hashes from sha512 to yescrypt
Date: Mon, 25 Jul 2022 15:11:24
Message-Id: 1bb403c7-f6f8-3c40-5f90-eef3fc6f74fa@gentoo.org
In Reply to: Re: [gentoo-dev] Switching default password hashes from sha512 to yescrypt by Peter Stuge
1 On 2022-07-25 15:35, Peter Stuge wrote:
2
3 > Mikhail Koliada wrote:
4 >> This idea has been fluctuating in my head for quite a while given
5 >> that the migration had happened a while ago [0] and some other
6 >> major distributions have already adopted yescrypt as their default algo
7 >> by now [1].
8 >
9 > Please only do that based on proven merit and nothing else.
10
11 https://pthree.org/2018/05/23/do-not-use-sha256crypt-sha512crypt-theyre-dangerous/
12 , https://www.password-hashing.net/ , the fact we still us the default
13 number of rounds (i.e. 5000) with SHA512 which is *ridiculously* weak
14 for modern hardware, lack of Argon2 support in libxcrypt for the time
15 being due to upstream having decided to wait for an official RFC. You
16 can probably find more yourself if you look.
17
18 --
19 Marecki

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