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authorArd Biesheuvel <ardb@kernel.org>2019-11-08 13:22:08 +0100
committerHerbert Xu <herbert@gondor.apana.org.au>2019-11-17 09:02:39 +0800
commit5fb8ef25803ef33e2eb60b626435828b937bed75 (patch)
tree156401ad072c1acc18f74cbdf8eb31859191b9ac /crypto/Kconfig
parent746b2e024c67aa605ac12d135cd7085a49cf9dc4 (diff)
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API, let's expose the streamcipher bits via a library API as well, in a way that permits the implementation to be superseded by an architecture specific one if provided.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/Kconfig1
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.