From 4a0e319af86c0d38304535293f6fc32fe436ef1d Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Tue, 28 Aug 2018 23:50:35 -0600 Subject: crypto: import zinc --- .../zinc/curve25519/curve25519-x86_64-glue.h | 50 ++++++++++++++++++++++ 1 file changed, 50 insertions(+) create mode 100644 src/crypto/zinc/curve25519/curve25519-x86_64-glue.h (limited to 'src/crypto/zinc/curve25519/curve25519-x86_64-glue.h') diff --git a/src/crypto/zinc/curve25519/curve25519-x86_64-glue.h b/src/crypto/zinc/curve25519/curve25519-x86_64-glue.h new file mode 100644 index 0000000..4499cd9 --- /dev/null +++ b/src/crypto/zinc/curve25519/curve25519-x86_64-glue.h @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2015-2018 Jason A. Donenfeld . All Rights Reserved. + */ + +#include +#include +#include +#include + +#include "curve25519-x86_64.h" + +static bool curve25519_use_bmi2 __ro_after_init; +static bool curve25519_use_adx __ro_after_init; + +void __init curve25519_fpu_init(void) +{ + curve25519_use_bmi2 = boot_cpu_has(X86_FEATURE_BMI2); + curve25519_use_adx = boot_cpu_has(X86_FEATURE_BMI2) && + boot_cpu_has(X86_FEATURE_ADX); +} + +static inline bool curve25519_arch(u8 mypublic[CURVE25519_POINT_SIZE], + const u8 secret[CURVE25519_POINT_SIZE], + const u8 basepoint[CURVE25519_POINT_SIZE]) +{ + if (curve25519_use_adx) { + curve25519_adx(mypublic, secret, basepoint); + return true; + } else if (curve25519_use_bmi2) { + curve25519_bmi2(mypublic, secret, basepoint); + return true; + } + return false; +} + +static inline bool curve25519_base_arch(u8 pub[CURVE25519_POINT_SIZE], + const u8 secret[CURVE25519_POINT_SIZE]) +{ + if (curve25519_use_adx) { + curve25519_adx_base(pub, secret); + return true; + } else if (curve25519_use_bmi2) { + curve25519_bmi2_base(pub, secret); + return true; + } + return false; +} + +#define HAVE_CURVE25519_ARCH_IMPLEMENTATION -- cgit v1.2.3-59-g8ed1b