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UPSTREAM: crypto: curve25519 - x86_64 library and KPP implementations

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This implementation is the fastest available x86_64 implementation, and
unlike Sandy2x, it doesn't requie use of the floating point registers at
all. Instead it makes use of BMI2 and ADX, available on recent
microarchitectures. The implementation was written by Armando
Faz-Hernández with contributions (upstream) from Samuel Neves and me,
in addition to further changes in the kernel implementation from us.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Samuel Neves <sneves@dei.uc.pt>
Co-developed-by: Samuel Neves <sneves@dei.uc.pt>
[ardb: - move to arch/x86/crypto
       - wire into lib/crypto framework
       - implement crypto API KPP hooks ]
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
(cherry picked from commit bb611bdfd6be34d9f822c73305fcc83720499d38)
Bug: 152722841
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Change-Id: I55cf9d0e6d8f2fa63be54e284cad5dd84268f5c3
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Jason A. Donenfeld 2019-11-08 13:22:36 +01:00 • committed by Alexander Martinz
commit 076cb4f71d
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6
crypto/Kconfig
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@ -269,6 +269,12 @@ config CRYPTO_CURVE25519
select CRYPTO_KPP
select CRYPTO_LIB_CURVE25519_GENERIC
config CRYPTO_CURVE25519_X86
tristate "x86_64 accelerated Curve25519 scalar multiplication library"
depends on X86 && 64BIT
select CRYPTO_LIB_CURVE25519_GENERIC
select CRYPTO_ARCH_HAVE_LIB_CURVE25519
comment "Authenticated Encryption with Associated Data"
config CRYPTO_CCM