linux-IllusionX/crypto/blake2b_generic.c
Nathan Chancellor 2947a4567f treewide: update LLVM Bugzilla links
LLVM moved their issue tracker from their own Bugzilla instance to GitHub
issues.  While all of the links are still valid, they may not necessarily
show the most up to date information around the issues, as all updates
will occur on GitHub, not Bugzilla.

Another complication is that the Bugzilla issue number is not always the
same as the GitHub issue number.  Thankfully, LLVM maintains this mapping
through two shortlinks:

  https://llvm.org/bz<num> -> https://bugs.llvm.org/show_bug.cgi?id=<num>
  https://llvm.org/pr<num> -> https://github.com/llvm/llvm-project/issues/<mapped_num>

Switch all "https://bugs.llvm.org/show_bug.cgi?id=<num>" links to the
"https://llvm.org/pr<num>" shortlink so that the links show the most up to
date information.  Each migrated issue links back to the Bugzilla entry,
so there should be no loss of fidelity of information here.

Link: https://lkml.kernel.org/r/20240109-update-llvm-links-v1-3-eb09b59db071@kernel.org
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Acked-by: Fangrui Song <maskray@google.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Mykola Lysenko <mykolal@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-02-22 15:38:51 -08:00

187 lines
5.9 KiB
C

// SPDX-License-Identifier: (GPL-2.0-only OR Apache-2.0)
/*
* Generic implementation of the BLAKE2b digest algorithm. Based on the BLAKE2b
* reference implementation, but it has been heavily modified for use in the
* kernel. The reference implementation was:
*
* Copyright 2012, Samuel Neves <sneves@dei.uc.pt>. You may use this under
* the terms of the CC0, the OpenSSL Licence, or the Apache Public License
* 2.0, at your option. The terms of these licenses can be found at:
*
* - CC0 1.0 Universal : http://creativecommons.org/publicdomain/zero/1.0
* - OpenSSL license : https://www.openssl.org/source/license.html
* - Apache 2.0 : https://www.apache.org/licenses/LICENSE-2.0
*
* More information about BLAKE2 can be found at https://blake2.net.
*/
#include <asm/unaligned.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/bitops.h>
#include <crypto/internal/blake2b.h>
#include <crypto/internal/hash.h>
static const u8 blake2b_sigma[12][16] = {
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 },
{ 11, 8, 12, 0, 5, 2, 15, 13, 10, 14, 3, 6, 7, 1, 9, 4 },
{ 7, 9, 3, 1, 13, 12, 11, 14, 2, 6, 5, 10, 4, 0, 15, 8 },
{ 9, 0, 5, 7, 2, 4, 10, 15, 14, 1, 11, 12, 6, 8, 3, 13 },
{ 2, 12, 6, 10, 0, 11, 8, 3, 4, 13, 7, 5, 15, 14, 1, 9 },
{ 12, 5, 1, 15, 14, 13, 4, 10, 0, 7, 6, 3, 9, 2, 8, 11 },
{ 13, 11, 7, 14, 12, 1, 3, 9, 5, 0, 15, 4, 8, 6, 2, 10 },
{ 6, 15, 14, 9, 11, 3, 0, 8, 12, 2, 13, 7, 1, 4, 10, 5 },
{ 10, 2, 8, 4, 7, 6, 1, 5, 15, 11, 9, 14, 3, 12, 13, 0 },
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15 },
{ 14, 10, 4, 8, 9, 15, 13, 6, 1, 12, 0, 2, 11, 7, 5, 3 }
};
static void blake2b_increment_counter(struct blake2b_state *S, const u64 inc)
{
S->t[0] += inc;
S->t[1] += (S->t[0] < inc);
}
#define G(r,i,a,b,c,d) \
do { \
a = a + b + m[blake2b_sigma[r][2*i+0]]; \
d = ror64(d ^ a, 32); \
c = c + d; \
b = ror64(b ^ c, 24); \
a = a + b + m[blake2b_sigma[r][2*i+1]]; \
d = ror64(d ^ a, 16); \
c = c + d; \
b = ror64(b ^ c, 63); \
} while (0)
#define ROUND(r) \
do { \
G(r,0,v[ 0],v[ 4],v[ 8],v[12]); \
G(r,1,v[ 1],v[ 5],v[ 9],v[13]); \
G(r,2,v[ 2],v[ 6],v[10],v[14]); \
G(r,3,v[ 3],v[ 7],v[11],v[15]); \
G(r,4,v[ 0],v[ 5],v[10],v[15]); \
G(r,5,v[ 1],v[ 6],v[11],v[12]); \
G(r,6,v[ 2],v[ 7],v[ 8],v[13]); \
G(r,7,v[ 3],v[ 4],v[ 9],v[14]); \
} while (0)
static void blake2b_compress_one_generic(struct blake2b_state *S,
const u8 block[BLAKE2B_BLOCK_SIZE])
{
u64 m[16];
u64 v[16];
size_t i;
for (i = 0; i < 16; ++i)
m[i] = get_unaligned_le64(block + i * sizeof(m[i]));
for (i = 0; i < 8; ++i)
v[i] = S->h[i];
v[ 8] = BLAKE2B_IV0;
v[ 9] = BLAKE2B_IV1;
v[10] = BLAKE2B_IV2;
v[11] = BLAKE2B_IV3;
v[12] = BLAKE2B_IV4 ^ S->t[0];
v[13] = BLAKE2B_IV5 ^ S->t[1];
v[14] = BLAKE2B_IV6 ^ S->f[0];
v[15] = BLAKE2B_IV7 ^ S->f[1];
ROUND(0);
ROUND(1);
ROUND(2);
ROUND(3);
ROUND(4);
ROUND(5);
ROUND(6);
ROUND(7);
ROUND(8);
ROUND(9);
ROUND(10);
ROUND(11);
#ifdef CONFIG_CC_IS_CLANG
#pragma nounroll /* https://llvm.org/pr45803 */
#endif
for (i = 0; i < 8; ++i)
S->h[i] = S->h[i] ^ v[i] ^ v[i + 8];
}
#undef G
#undef ROUND
void blake2b_compress_generic(struct blake2b_state *state,
const u8 *block, size_t nblocks, u32 inc)
{
do {
blake2b_increment_counter(state, inc);
blake2b_compress_one_generic(state, block);
block += BLAKE2B_BLOCK_SIZE;
} while (--nblocks);
}
EXPORT_SYMBOL(blake2b_compress_generic);
static int crypto_blake2b_update_generic(struct shash_desc *desc,
const u8 *in, unsigned int inlen)
{
return crypto_blake2b_update(desc, in, inlen, blake2b_compress_generic);
}
static int crypto_blake2b_final_generic(struct shash_desc *desc, u8 *out)
{
return crypto_blake2b_final(desc, out, blake2b_compress_generic);
}
#define BLAKE2B_ALG(name, driver_name, digest_size) \
{ \
.base.cra_name = name, \
.base.cra_driver_name = driver_name, \
.base.cra_priority = 100, \
.base.cra_flags = CRYPTO_ALG_OPTIONAL_KEY, \
.base.cra_blocksize = BLAKE2B_BLOCK_SIZE, \
.base.cra_ctxsize = sizeof(struct blake2b_tfm_ctx), \
.base.cra_module = THIS_MODULE, \
.digestsize = digest_size, \
.setkey = crypto_blake2b_setkey, \
.init = crypto_blake2b_init, \
.update = crypto_blake2b_update_generic, \
.final = crypto_blake2b_final_generic, \
.descsize = sizeof(struct blake2b_state), \
}
static struct shash_alg blake2b_algs[] = {
BLAKE2B_ALG("blake2b-160", "blake2b-160-generic",
BLAKE2B_160_HASH_SIZE),
BLAKE2B_ALG("blake2b-256", "blake2b-256-generic",
BLAKE2B_256_HASH_SIZE),
BLAKE2B_ALG("blake2b-384", "blake2b-384-generic",
BLAKE2B_384_HASH_SIZE),
BLAKE2B_ALG("blake2b-512", "blake2b-512-generic",
BLAKE2B_512_HASH_SIZE),
};
static int __init blake2b_mod_init(void)
{
return crypto_register_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
}
static void __exit blake2b_mod_fini(void)
{
crypto_unregister_shashes(blake2b_algs, ARRAY_SIZE(blake2b_algs));
}
subsys_initcall(blake2b_mod_init);
module_exit(blake2b_mod_fini);
MODULE_AUTHOR("David Sterba <kdave@kernel.org>");
MODULE_DESCRIPTION("BLAKE2b generic implementation");
MODULE_LICENSE("GPL");
MODULE_ALIAS_CRYPTO("blake2b-160");
MODULE_ALIAS_CRYPTO("blake2b-160-generic");
MODULE_ALIAS_CRYPTO("blake2b-256");
MODULE_ALIAS_CRYPTO("blake2b-256-generic");
MODULE_ALIAS_CRYPTO("blake2b-384");
MODULE_ALIAS_CRYPTO("blake2b-384-generic");
MODULE_ALIAS_CRYPTO("blake2b-512");
MODULE_ALIAS_CRYPTO("blake2b-512-generic");