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| author | Eric Biggers <ebiggers@google.com> | 2018-12-04 22:20:02 -0800 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-12-13 18:24:57 +0800 |
| commit | 4af78261870a7d36dd222af8dad9688b705e365e (patch) | |
| tree | 6013fcbd4c774b15033d09b67dfa7320ec22bc3a /crypto/Kconfig | |
| parent | 0f961f9f670e7c07690bfde2f533b93c653569cc (diff) | |
| download | lwn-4af78261870a7d36dd222af8dad9688b705e365e.tar.gz lwn-4af78261870a7d36dd222af8dad9688b705e365e.zip | |
crypto: x86/chacha20 - add XChaCha20 support
Add an XChaCha20 implementation that is hooked up to the x86_64 SIMD
implementations of ChaCha20. This can be used by Adiantum.
An SSSE3 implementation of single-block HChaCha20 is also added so that
XChaCha20 can use it rather than the generic implementation. This
required refactoring the ChaCha permutation into its own function.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/Kconfig')
| -rw-r--r-- | crypto/Kconfig | 12 |
1 files changed, 3 insertions, 9 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig index d0bff6ea6b10..dc3a0e3ea2ac 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -1468,19 +1468,13 @@ config CRYPTO_CHACHA20 in some performance-sensitive scenarios. config CRYPTO_CHACHA20_X86_64 - tristate "ChaCha20 cipher algorithm (x86_64/SSSE3/AVX2)" + tristate "ChaCha stream cipher algorithms (x86_64/SSSE3/AVX2/AVX-512VL)" depends on X86 && 64BIT select CRYPTO_BLKCIPHER select CRYPTO_CHACHA20 help - ChaCha20 cipher algorithm, RFC7539. - - ChaCha20 is a 256-bit high-speed stream cipher designed by Daniel J. - Bernstein and further specified in RFC7539 for use in IETF protocols. - This is the x86_64 assembler implementation using SIMD instructions. - - See also: - <http://cr.yp.to/chacha/chacha-20080128.pdf> + SSSE3, AVX2, and AVX-512VL optimized implementations of the ChaCha20 + and XChaCha20 stream ciphers. config CRYPTO_SEED tristate "SEED cipher algorithm" |