From 4af78261870a7d36dd222af8dad9688b705e365e Mon Sep 17 00:00:00 2001 From: Eric Biggers Date: Tue, 4 Dec 2018 22:20:02 -0800 Subject: 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 Signed-off-by: Herbert Xu --- crypto/Kconfig | 12 +++--------- 1 file changed, 3 insertions(+), 9 deletions(-) (limited to 'crypto') 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: - + SSSE3, AVX2, and AVX-512VL optimized implementations of the ChaCha20 + and XChaCha20 stream ciphers. config CRYPTO_SEED tristate "SEED cipher algorithm" -- cgit v1.2.3-59-g8ed1b