linux/lib/crypto/blake2s.c
Randy Dunlap f03a3cab26 crypto: lib - rename 'mod_init' & 'mod_exit' functions to be module-specific
Rename module_init & module_exit functions that are named
"mod_init" and "mod_exit" so that they are unique in both the
System.map file and in initcall_debug output instead of showing
up as almost anonymous "mod_init".

This is helpful for debugging and in determining how long certain
module_init calls take to execute.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-crypto@vger.kernel.org
Cc: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2021-07-16 15:49:36 +08:00

93 lines
2.4 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>
#if IS_ENABLED(CONFIG_CRYPTO_ARCH_HAVE_LIB_BLAKE2S)
# define blake2s_compress blake2s_compress_arch
#else
# define blake2s_compress blake2s_compress_generic
#endif
void blake2s_update(struct blake2s_state *state, const u8 *in, size_t inlen)
{
__blake2s_update(state, in, inlen, blake2s_compress);
}
EXPORT_SYMBOL(blake2s_update);
void blake2s_final(struct blake2s_state *state, u8 *out)
{
WARN_ON(IS_ENABLED(DEBUG) && !out);
__blake2s_final(state, out, blake2s_compress);
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 blake2s_mod_init(void)
{
if (!IS_ENABLED(CONFIG_CRYPTO_MANAGER_DISABLE_TESTS) &&
WARN_ON(!blake2s_selftest()))
return -ENODEV;
return 0;
}
static void __exit blake2s_mod_exit(void)
{
}
module_init(blake2s_mod_init);
module_exit(blake2s_mod_exit);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("BLAKE2s hash function");
MODULE_AUTHOR("Jason A. Donenfeld <Jason@zx2c4.com>");