mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 13:38:24 +07:00
66d7fb94e4
The C implementation was originally based on Samuel Neves' public domain reference implementation but has since been heavily modified for the kernel. We're able to do compile-time optimizations by moving some scaffolding around the final function into the header file. Information: https://blake2.net/ 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 from lib/zinc to lib/crypto - remove simd handling - rewrote selftest for better coverage - use fixed digest length for blake2s_hmac() and rename to blake2s256_hmac() ] Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
// SPDX-License-Identifier: GPL-2.0 OR MIT
|
|
/*
|
|
* Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
|
|
*
|
|
* This is an implementation of the BLAKE2s hash and PRF functions.
|
|
*
|
|
* Information: https://blake2.net/
|
|
*
|
|
*/
|
|
|
|
#include <crypto/internal/blake2s.h>
|
|
#include <linux/types.h>
|
|
#include <linux/string.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/bug.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
bool blake2s_selftest(void);
|
|
|
|
void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen)
|
|
{
|
|
const size_t fill = BLAKE2S_BLOCK_SIZE - state->buflen;
|
|
|
|
if (unlikely(!inlen))
|
|
return;
|
|
if (inlen > fill) {
|
|
memcpy(state->buf + state->buflen, in, fill);
|
|
if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_BLAKE2S))
|
|
blake2s_compress_arch(state, state->buf, 1,
|
|
BLAKE2S_BLOCK_SIZE);
|
|
else
|
|
blake2s_compress_generic(state, state->buf, 1,
|
|
BLAKE2S_BLOCK_SIZE);
|
|
state->buflen = 0;
|
|
in += fill;
|
|
inlen -= fill;
|
|
}
|
|
if (inlen > BLAKE2S_BLOCK_SIZE) {
|
|
const size_t nblocks = DIV_ROUND_UP(inlen, BLAKE2S_BLOCK_SIZE);
|
|
/* Hash one less (full) block than strictly possible */
|
|
if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_BLAKE2S))
|
|
blake2s_compress_arch(state, in, nblocks - 1,
|
|
BLAKE2S_BLOCK_SIZE);
|
|
else
|
|
blake2s_compress_generic(state, in, nblocks - 1,
|
|
BLAKE2S_BLOCK_SIZE);
|
|
in += BLAKE2S_BLOCK_SIZE * (nblocks - 1);
|
|
inlen -= BLAKE2S_BLOCK_SIZE * (nblocks - 1);
|
|
}
|
|
memcpy(state->buf + state->buflen, in, inlen);
|
|
state->buflen += inlen;
|
|
}
|
|
EXPORT_SYMBOL(blake2s_update);
|
|
|
|
void blake2s_final(struct blake2s_state *state, u8 *out)
|
|
{
|
|
WARN_ON(IS_ENABLED(DEBUG) && !out);
|
|
blake2s_set_lastblock(state);
|
|
memset(state->buf + state->buflen, 0,
|
|
BLAKE2S_BLOCK_SIZE - state->buflen); /* Padding */
|
|
if (IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_BLAKE2S))
|
|
blake2s_compress_arch(state, state->buf, 1, state->buflen);
|
|
else
|
|
blake2s_compress_generic(state, state->buf, 1, state->buflen);
|
|
cpu_to_le32_array(state->h, ARRAY_SIZE(state->h));
|
|
memcpy(out, state->h, state->outlen);
|
|
memzero_explicit(state, sizeof(*state));
|
|
}
|
|
EXPORT_SYMBOL(blake2s_final);
|
|
|
|
void blake2s256_hmac(u8 *out, const u8 *in, const u8 *key, const size_t inlen,
|
|
const size_t keylen)
|
|
{
|
|
struct blake2s_state state;
|
|
u8 x_key[BLAKE2S_BLOCK_SIZE] __aligned(__alignof__(u32)) = { 0 };
|
|
u8 i_hash[BLAKE2S_HASH_SIZE] __aligned(__alignof__(u32));
|
|
int i;
|
|
|
|
if (keylen > BLAKE2S_BLOCK_SIZE) {
|
|
blake2s_init(&state, BLAKE2S_HASH_SIZE);
|
|
blake2s_update(&state, key, keylen);
|
|
blake2s_final(&state, x_key);
|
|
} else
|
|
memcpy(x_key, key, keylen);
|
|
|
|
for (i = 0; i < BLAKE2S_BLOCK_SIZE; ++i)
|
|
x_key[i] ^= 0x36;
|
|
|
|
blake2s_init(&state, BLAKE2S_HASH_SIZE);
|
|
blake2s_update(&state, x_key, BLAKE2S_BLOCK_SIZE);
|
|
blake2s_update(&state, in, inlen);
|
|
blake2s_final(&state, i_hash);
|
|
|
|
for (i = 0; i < BLAKE2S_BLOCK_SIZE; ++i)
|
|
x_key[i] ^= 0x5c ^ 0x36;
|
|
|
|
blake2s_init(&state, BLAKE2S_HASH_SIZE);
|
|
blake2s_update(&state, x_key, BLAKE2S_BLOCK_SIZE);
|
|
blake2s_update(&state, i_hash, BLAKE2S_HASH_SIZE);
|
|
blake2s_final(&state, i_hash);
|
|
|
|
memcpy(out, i_hash, BLAKE2S_HASH_SIZE);
|
|
memzero_explicit(x_key, BLAKE2S_BLOCK_SIZE);
|
|
memzero_explicit(i_hash, BLAKE2S_HASH_SIZE);
|
|
}
|
|
EXPORT_SYMBOL(blake2s256_hmac);
|
|
|
|
static int __init mod_init(void)
|
|
{
|
|
if (!IS_ENABLED(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS) &&
|
|
WARN_ON(!blake2s_selftest()))
|
|
return -ENODEV;
|
|
return 0;
|
|
}
|
|
|
|
static void __exit mod_exit(void)
|
|
{
|
|
}
|
|
|
|
module_init(mod_init);
|
|
module_exit(mod_exit);
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_DESCRIPTION("BLAKE2s hash function");
|
|
MODULE_AUTHOR("Jason A. Donenfeld <Jason@zx2c4.com>");
|