mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-09-04 20:19:47 +08:00
4f0fc1600e
Add OSCCA SM3 secure hash (OSCCA GM/T 0004-2012 SM3) generic hash transformation. Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
118 lines
3.0 KiB
C
118 lines
3.0 KiB
C
/*
|
|
* sm3_base.h - core logic for SM3 implementations
|
|
*
|
|
* Copyright (C) 2017 ARM Limited or its affiliates.
|
|
* Written by Gilad Ben-Yossef <gilad@benyossef.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <crypto/internal/hash.h>
|
|
#include <crypto/sm3.h>
|
|
#include <linux/crypto.h>
|
|
#include <linux/module.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
typedef void (sm3_block_fn)(struct sm3_state *sst, u8 const *src, int blocks);
|
|
|
|
static inline int sm3_base_init(struct shash_desc *desc)
|
|
{
|
|
struct sm3_state *sctx = shash_desc_ctx(desc);
|
|
|
|
sctx->state[0] = SM3_IVA;
|
|
sctx->state[1] = SM3_IVB;
|
|
sctx->state[2] = SM3_IVC;
|
|
sctx->state[3] = SM3_IVD;
|
|
sctx->state[4] = SM3_IVE;
|
|
sctx->state[5] = SM3_IVF;
|
|
sctx->state[6] = SM3_IVG;
|
|
sctx->state[7] = SM3_IVH;
|
|
sctx->count = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int sm3_base_do_update(struct shash_desc *desc,
|
|
const u8 *data,
|
|
unsigned int len,
|
|
sm3_block_fn *block_fn)
|
|
{
|
|
struct sm3_state *sctx = shash_desc_ctx(desc);
|
|
unsigned int partial = sctx->count % SM3_BLOCK_SIZE;
|
|
|
|
sctx->count += len;
|
|
|
|
if (unlikely((partial + len) >= SM3_BLOCK_SIZE)) {
|
|
int blocks;
|
|
|
|
if (partial) {
|
|
int p = SM3_BLOCK_SIZE - partial;
|
|
|
|
memcpy(sctx->buffer + partial, data, p);
|
|
data += p;
|
|
len -= p;
|
|
|
|
block_fn(sctx, sctx->buffer, 1);
|
|
}
|
|
|
|
blocks = len / SM3_BLOCK_SIZE;
|
|
len %= SM3_BLOCK_SIZE;
|
|
|
|
if (blocks) {
|
|
block_fn(sctx, data, blocks);
|
|
data += blocks * SM3_BLOCK_SIZE;
|
|
}
|
|
partial = 0;
|
|
}
|
|
if (len)
|
|
memcpy(sctx->buffer + partial, data, len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int sm3_base_do_finalize(struct shash_desc *desc,
|
|
sm3_block_fn *block_fn)
|
|
{
|
|
const int bit_offset = SM3_BLOCK_SIZE - sizeof(__be64);
|
|
struct sm3_state *sctx = shash_desc_ctx(desc);
|
|
__be64 *bits = (__be64 *)(sctx->buffer + bit_offset);
|
|
unsigned int partial = sctx->count % SM3_BLOCK_SIZE;
|
|
|
|
sctx->buffer[partial++] = 0x80;
|
|
if (partial > bit_offset) {
|
|
memset(sctx->buffer + partial, 0x0, SM3_BLOCK_SIZE - partial);
|
|
partial = 0;
|
|
|
|
block_fn(sctx, sctx->buffer, 1);
|
|
}
|
|
|
|
memset(sctx->buffer + partial, 0x0, bit_offset - partial);
|
|
*bits = cpu_to_be64(sctx->count << 3);
|
|
block_fn(sctx, sctx->buffer, 1);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline int sm3_base_finish(struct shash_desc *desc, u8 *out)
|
|
{
|
|
struct sm3_state *sctx = shash_desc_ctx(desc);
|
|
__be32 *digest = (__be32 *)out;
|
|
int i;
|
|
|
|
for (i = 0; i < SM3_DIGEST_SIZE / sizeof(__be32); i++)
|
|
put_unaligned_be32(sctx->state[i], digest++);
|
|
|
|
*sctx = (struct sm3_state){};
|
|
return 0;
|
|
}
|