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| author | Ard Biesheuvel <ardb@kernel.org> | 2019-11-08 13:22:08 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2019-11-17 09:02:39 +0800 |
| commit | 5fb8ef25803ef33e2eb60b626435828b937bed75 (patch) | |
| tree | 156401ad072c1acc18f74cbdf8eb31859191b9ac /crypto/Kconfig | |
| parent | 746b2e024c67aa605ac12d135cd7085a49cf9dc4 (diff) | |
| download | lwn-5fb8ef25803ef33e2eb60b626435828b937bed75.tar.gz lwn-5fb8ef25803ef33e2eb60b626435828b937bed75.zip | |
crypto: chacha - move existing library code into lib/crypto
Currently, our generic ChaCha implementation consists of a permute
function in lib/chacha.c that operates on the 64-byte ChaCha state
directly [and which is always included into the core kernel since it
is used by the /dev/random driver], and the crypto API plumbing to
expose it as a skcipher.
In order to support in-kernel users that need the ChaCha streamcipher
but have no need [or tolerance] for going through the abstractions of
the crypto API, let's expose the streamcipher bits via a library API
as well, in a way that permits the implementation to be superseded by
an architecture specific one if provided.
So move the streamcipher code into a separate module in lib/crypto,
and expose the init() and crypt() routines to users of the library.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/Kconfig')
| -rw-r--r-- | crypto/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig index 9def945e9549..ae4495ae003f 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1412,6 +1412,7 @@ config CRYPTO_SALSA20 config CRYPTO_CHACHA20 tristate "ChaCha stream cipher algorithms" + select CRYPTO_LIB_CHACHA_GENERIC select CRYPTO_SKCIPHER help The ChaCha20, XChaCha20, and XChaCha12 stream cipher algorithms. |