Contributors: 2
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Jason A. Donenfeld |
161 |
94.71% |
2 |
66.67% |
| Eric Biggers |
9 |
5.29% |
1 |
33.33% |
| Total |
170 |
|
3 |
|
// SPDX-License-Identifier: GPL-2.0 OR MIT
/*
* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
*
* Based on public domain code from Daniel J. Bernstein and Peter Schwabe. This
* began from SUPERCOP's curve25519/neon2/scalarmult.s, but has subsequently been
* manually reworked for use in kernel space.
*/
#include <asm/hwcap.h>
#include <asm/neon.h>
#include <asm/simd.h>
#include <crypto/internal/simd.h>
#include <linux/types.h>
#include <linux/jump_label.h>
asmlinkage void curve25519_neon(u8 mypublic[CURVE25519_KEY_SIZE],
const u8 secret[CURVE25519_KEY_SIZE],
const u8 basepoint[CURVE25519_KEY_SIZE]);
static __ro_after_init DEFINE_STATIC_KEY_FALSE(have_neon);
static void curve25519_arch(u8 out[CURVE25519_KEY_SIZE],
const u8 scalar[CURVE25519_KEY_SIZE],
const u8 point[CURVE25519_KEY_SIZE])
{
if (static_branch_likely(&have_neon) && crypto_simd_usable()) {
kernel_neon_begin();
curve25519_neon(out, scalar, point);
kernel_neon_end();
} else {
curve25519_generic(out, scalar, point);
}
}
static void curve25519_base_arch(u8 pub[CURVE25519_KEY_SIZE],
const u8 secret[CURVE25519_KEY_SIZE])
{
curve25519_arch(pub, secret, curve25519_base_point);
}
#define curve25519_mod_init_arch curve25519_mod_init_arch
static void curve25519_mod_init_arch(void)
{
if (elf_hwcap & HWCAP_NEON)
static_branch_enable(&have_neon);
}