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curve25519: replace hacl64 with fiat64

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For now, it's faster:

hacl64: 109782 cycles per call
fiat64: 108984 cycles per call

It's quite possible this commit will be reverted with nice changes from
INRIA, though.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
Jason A. Donenfeld 2018-01-31 16:53:59 +01:00
parent bc3f283148
commit 40ae0e0bba
2 changed files with 4 additions and 9 deletions
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2
contrib/keygen-html/src/curve25519_generate.c
View File

@ -48,7 +48,7 @@ static __always_inline void normalize_secret(u8 secret[CURVE25519_POINT_SIZE])
secret[31] |= 64; secret[31] |= 64;
} }
#include "../../../../src/crypto/curve25519-fiat32.h" #include "../../../../src/crypto/curve25519-generic.h"
EMSCRIPTEN_KEEPALIVE void curve25519_generate_public(u8 public[static 32], const u8 private[static 32]) EMSCRIPTEN_KEEPALIVE void curve25519_generate_public(u8 public[static 32], const u8 private[static 32])
{ {

11
src/curve25519.c
View File

@ -1,11 +1,6 @@
/* SPDX-License-Identifier: GPL-2.0 /* SPDX-License-Identifier: GPL-2.0
* *
* Copyright (C) 2016-2017 INRIA and Microsoft Corporation.
* Copyright (C) 2015-2016 The fiat-crypto Authors.
* Copyright (C) 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. * Copyright (C) 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*
* This is a machine-generated formally verified implementation of curve25519 DH from:
* https://github.com/mitls/hacl-star and https://github.com/mit-plv/fiat-crypto
*/ */
#include "curve25519.h" #include "curve25519.h"
@ -44,11 +39,11 @@ static noinline void memzero_explicit(void *s, size_t count)
} }
#ifdef __SIZEOF_INT128__ #ifdef __SIZEOF_INT128__
#include "../crypto/curve25519-hacl64.h" #define CONFIG_ARCH_SUPPORTS_INT128
#else
#include "../crypto/curve25519-fiat32.h"
#endif #endif
#include "../crypto/curve25519-generic.h"
void curve25519_generate_public(uint8_t pub[static CURVE25519_POINT_SIZE], const uint8_t secret[static CURVE25519_POINT_SIZE]) void curve25519_generate_public(uint8_t pub[static CURVE25519_POINT_SIZE], const uint8_t secret[static CURVE25519_POINT_SIZE])
{ {
static const uint8_t basepoint[CURVE25519_POINT_SIZE] = { 9 }; static const uint8_t basepoint[CURVE25519_POINT_SIZE] = { 9 };