From: Segher Boessenkool <segher@kernel.crashing.org>
To: Eric Biggers <ebiggers@kernel.org>
Cc: linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
Ard Biesheuvel <ardb@kernel.org>,
"Jason A . Donenfeld" <Jason@zx2c4.com>,
linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
sparclinux@vger.kernel.org
Subject: Re: [PATCH 3/7] crypto: powerpc/md5 - Remove PowerPC optimized MD5 code
Date: Sun, 3 Aug 2025 17:07:10 -0500 [thread overview]
Message-ID: <aI_djr4v-3nQqG9E@gate> (raw)
In-Reply-To: <20250803204433.75703-4-ebiggers@kernel.org>
On Sun, Aug 03, 2025 at 01:44:29PM -0700, Eric Biggers wrote:
> MD5 is insecure,
Really? Have you found an attack? Can you explain it to the rest of
the world?
MD5 is not recommended for future cryptographic purposes, there have
been some collission "attacks" on it (quotes because such a thing is
never an attack at all, merely an indication that not all is well with
it, somewhere in the future an actual vulnerability might be found).
Since there are newer, better, *cheaper* alternatives available, of
course you should not use MD5 for anything new anymore. But claiming it
is insecure is FUD.
> This commit removes the PowerPC optimized MD5 code.
Why? It would help to have real arguments for it!
If you just want to remove code you have no interest in, there are much
bigger targets available...
Segher
next prev parent reply other threads:[~2025-08-03 22:11 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-03 20:44 [PATCH 0/7] MD5 library functions Eric Biggers
2025-08-03 20:44 ` [PATCH 1/7] mips: cavium-octeon: Remove Octeon optimized MD5 code Eric Biggers
2025-08-03 20:44 ` [PATCH 2/7] mips: cavium-octeon: Move octeon-crypto.c into parent dir Eric Biggers
2025-08-03 20:44 ` [PATCH 3/7] crypto: powerpc/md5 - Remove PowerPC optimized MD5 code Eric Biggers
2025-08-03 22:07 ` Segher Boessenkool [this message]
2025-08-03 22:14 ` Eric Biggers
2025-08-03 22:27 ` Segher Boessenkool
2025-08-03 22:56 ` Eric Biggers
2025-08-04 17:42 ` Christophe Leroy
2025-08-04 18:09 ` Eric Biggers
2025-08-04 19:02 ` Christophe Leroy
2025-08-04 22:59 ` Eric Biggers
2025-08-04 23:09 ` Eric Biggers
2025-08-05 6:21 ` Christophe Leroy
2025-08-05 4:49 ` Crypto use cases (was: Remove PowerPC optimized MD5 code) Simon Richter
2025-08-05 4:58 ` Eric Biggers
2025-08-05 7:17 ` Crypto use cases Simon Richter
2025-08-05 17:15 ` Eric Biggers
2025-08-05 6:27 ` [PATCH 3/7] crypto: powerpc/md5 - Remove PowerPC optimized MD5 code Christophe Leroy
2025-08-05 16:16 ` Eric Biggers
2025-08-03 20:44 ` [PATCH 4/7] crypto: sparc/md5 - Remove SPARC64 " Eric Biggers
2025-08-04 4:44 ` Simon Richter
2025-08-04 6:07 ` Eric Biggers
2025-08-03 20:44 ` [PATCH 5/7] lib/crypto: md5: Add MD5 and HMAC-MD5 library functions Eric Biggers
2025-08-03 20:44 ` [PATCH 6/7] crypto: md5 - Wrap library and add HMAC support Eric Biggers
2025-08-03 20:44 ` [PATCH 7/7] lib/crypto: tests: Add KUnit tests for MD5 and HMAC-MD5 Eric Biggers
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