crypto: chacha20 - Add a SSSE3 SIMD variant for x86_64

[firefly-linux-kernel-4.4.55.git] / crypto / Kconfig

diff --git a/crypto/Kconfig b/crypto/Kconfig
index b4cfc5754033b9ddfa17d8ad395baf0e751891bd..8f24185ee0a7fe60d769ca7da73f1874c87e8c40 100644 (file)
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1213,6 +1213,21 @@ config CRYPTO_CHACHA20
          See also:
          <http://cr.yp.to/chacha/chacha-20080128.pdf>
 
+config CRYPTO_CHACHA20_X86_64
+       tristate "ChaCha20 cipher algorithm (x86_64/SSSE3)"
+       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>
+
 config CRYPTO_SEED
        tristate "SEED cipher algorithm"
        select CRYPTO_ALGAPI