On Thu, Jan 21, 2021 at 02:07:33PM +0100, Ard Biesheuvel wrote: > Salsa20 is not used anywhere in the kernel, is not suitable for disk > encryption, and widely considered to have been superseded by ChaCha20. > So let's remove it. > > Signed-off-by: Ard Biesheuvel <a...@kernel.org> > --- > Documentation/admin-guide/device-mapper/dm-integrity.rst | 4 +- > crypto/Kconfig | 12 - > crypto/Makefile | 1 - > crypto/salsa20_generic.c | 212 ---- > crypto/tcrypt.c | 11 +- > crypto/testmgr.c | 6 - > crypto/testmgr.h | 1162 > -------------------- > 7 files changed, 3 insertions(+), 1405 deletions(-) > > diff --git a/Documentation/admin-guide/device-mapper/dm-integrity.rst > b/Documentation/admin-guide/device-mapper/dm-integrity.rst > index 4e6f504474ac..d56112e2e354 100644 > --- a/Documentation/admin-guide/device-mapper/dm-integrity.rst > +++ b/Documentation/admin-guide/device-mapper/dm-integrity.rst > @@ -143,8 +143,8 @@ recalculate > journal_crypt:algorithm(:key) (the key is optional) > Encrypt the journal using given algorithm to make sure that the > attacker can't read the journal. You can use a block cipher here > - (such as "cbc(aes)") or a stream cipher (for example "chacha20", > - "salsa20" or "ctr(aes)"). > + (such as "cbc(aes)") or a stream cipher (for example "chacha20" > + or "ctr(aes)").
You should check with the dm-integrity maintainers how likely it is that people are using salsa20 with dm-integrity. It's possible that people are using it, especially since the documentation says that dm-integrity can use a stream cipher and specifically gives salsa20 as an example. - Eric
