mirror of
git://git.yoctoproject.org/linux-yocto.git
synced 2026-01-27 12:47:24 +01:00
68546e5632
Reorganize the Curve25519 library code: - Build a single libcurve25519 module, instead of up to three modules: libcurve25519, libcurve25519-generic, and an arch-specific module. - Move the arch-specific Curve25519 code from arch/$(SRCARCH)/crypto/ to lib/crypto/$(SRCARCH)/. Centralize the build rules into lib/crypto/Makefile and lib/crypto/Kconfig. - Include the arch-specific code directly in lib/crypto/curve25519.c via a header, rather than using a separate .c file. - Eliminate the entanglement with CRYPTO. CRYPTO_LIB_CURVE25519 no longer selects CRYPTO, and the arch-specific Curve25519 code no longer depends on CRYPTO. This brings Curve25519 in line with the latest conventions for lib/crypto/, used by other algorithms. The exception is that I kept the generic code in separate translation units for now. (Some of the function names collide between the x86 and generic Curve25519 code. And the Curve25519 functions are very long anyway, so inlining doesn't matter as much for Curve25519 as it does for some other algorithms.) Link: https://lore.kernel.org/r/20250906213523.84915-11-ebiggers@kernel.org Signed-off-by: Eric Biggers <ebiggers@kernel.org>
40 lines
1.0 KiB
C
40 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
|
|
/*
|
|
* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
|
|
*/
|
|
|
|
#ifndef CURVE25519_H
|
|
#define CURVE25519_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/random.h>
|
|
|
|
enum curve25519_lengths {
|
|
CURVE25519_KEY_SIZE = 32
|
|
};
|
|
|
|
void curve25519_generic(u8 out[CURVE25519_KEY_SIZE],
|
|
const u8 scalar[CURVE25519_KEY_SIZE],
|
|
const u8 point[CURVE25519_KEY_SIZE]);
|
|
|
|
bool __must_check curve25519(u8 mypublic[CURVE25519_KEY_SIZE],
|
|
const u8 secret[CURVE25519_KEY_SIZE],
|
|
const u8 basepoint[CURVE25519_KEY_SIZE]);
|
|
|
|
bool __must_check curve25519_generate_public(u8 pub[CURVE25519_KEY_SIZE],
|
|
const u8 secret[CURVE25519_KEY_SIZE]);
|
|
|
|
static inline void curve25519_clamp_secret(u8 secret[CURVE25519_KEY_SIZE])
|
|
{
|
|
secret[0] &= 248;
|
|
secret[31] = (secret[31] & 127) | 64;
|
|
}
|
|
|
|
static inline void curve25519_generate_secret(u8 secret[CURVE25519_KEY_SIZE])
|
|
{
|
|
get_random_bytes_wait(secret, CURVE25519_KEY_SIZE);
|
|
curve25519_clamp_secret(secret);
|
|
}
|
|
|
|
#endif /* CURVE25519_H */
|