crypto: sm3 - add OSCCA SM3 secure hash

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>
This commit is contained in:
Gilad Ben-Yossef 2017-08-21 13:51:28 +03:00 committed by Herbert Xu
parent 1c9fa294fe
commit 4f0fc1600e
5 changed files with 379 additions and 0 deletions

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@ -859,6 +859,17 @@ config CRYPTO_SHA3
References:
http://keccak.noekeon.org/
config CRYPTO_SM3
tristate "SM3 digest algorithm"
select CRYPTO_HASH
help
SM3 secure hash function as defined by OSCCA GM/T 0004-2012 SM3).
It is part of the Chinese Commercial Cryptography suite.
References:
http://www.oscca.gov.cn/UpFile/20101222141857786.pdf
https://datatracker.ietf.org/doc/html/draft-shen-sm3-hash
config CRYPTO_TGR192
tristate "Tiger digest algorithms"
select CRYPTO_HASH

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@ -70,6 +70,7 @@ obj-$(CONFIG_CRYPTO_SHA1) += sha1_generic.o
obj-$(CONFIG_CRYPTO_SHA256) += sha256_generic.o
obj-$(CONFIG_CRYPTO_SHA512) += sha512_generic.o
obj-$(CONFIG_CRYPTO_SHA3) += sha3_generic.o
obj-$(CONFIG_CRYPTO_SM3) += sm3_generic.o
obj-$(CONFIG_CRYPTO_WP512) += wp512.o
CFLAGS_wp512.o := $(call cc-option,-fno-schedule-insns) # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79149
obj-$(CONFIG_CRYPTO_TGR192) += tgr192.o

210
crypto/sm3_generic.c Normal file
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@ -0,0 +1,210 @@
/*
* SM3 secure hash, as specified by OSCCA GM/T 0004-2012 SM3 and
* described at https://tools.ietf.org/html/draft-shen-sm3-hash-01
*
* 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 <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <crypto/sm3.h>
#include <crypto/sm3_base.h>
#include <linux/bitops.h>
#include <asm/byteorder.h>
#include <asm/unaligned.h>
const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = {
0x1A, 0xB2, 0x1D, 0x83, 0x55, 0xCF, 0xA1, 0x7F,
0x8e, 0x61, 0x19, 0x48, 0x31, 0xE8, 0x1A, 0x8F,
0x22, 0xBE, 0xC8, 0xC7, 0x28, 0xFE, 0xFB, 0x74,
0x7E, 0xD0, 0x35, 0xEB, 0x50, 0x82, 0xAA, 0x2B
};
EXPORT_SYMBOL_GPL(sm3_zero_message_hash);
static inline u32 p0(u32 x)
{
return x ^ rol32(x, 9) ^ rol32(x, 17);
}
static inline u32 p1(u32 x)
{
return x ^ rol32(x, 15) ^ rol32(x, 23);
}
static inline u32 ff(unsigned int n, u32 a, u32 b, u32 c)
{
return (n < 16) ? (a ^ b ^ c) : ((a & b) | (a & c) | (b & c));
}
static inline u32 gg(unsigned int n, u32 e, u32 f, u32 g)
{
return (n < 16) ? (e ^ f ^ g) : ((e & f) | ((~e) & g));
}
static inline u32 t(unsigned int n)
{
return (n < 16) ? SM3_T1 : SM3_T2;
}
static void sm3_expand(u32 *t, u32 *w, u32 *wt)
{
int i;
unsigned int tmp;
/* load the input */
for (i = 0; i <= 15; i++)
w[i] = get_unaligned_be32((__u32 *)t + i);
for (i = 16; i <= 67; i++) {
tmp = w[i - 16] ^ w[i - 9] ^ rol32(w[i - 3], 15);
w[i] = p1(tmp) ^ (rol32(w[i - 13], 7)) ^ w[i - 6];
}
for (i = 0; i <= 63; i++)
wt[i] = w[i] ^ w[i + 4];
}
static void sm3_compress(u32 *w, u32 *wt, u32 *m)
{
u32 ss1;
u32 ss2;
u32 tt1;
u32 tt2;
u32 a, b, c, d, e, f, g, h;
int i;
a = m[0];
b = m[1];
c = m[2];
d = m[3];
e = m[4];
f = m[5];
g = m[6];
h = m[7];
for (i = 0; i <= 63; i++) {
ss1 = rol32((rol32(a, 12) + e + rol32(t(i), i)), 7);
ss2 = ss1 ^ rol32(a, 12);
tt1 = ff(i, a, b, c) + d + ss2 + *wt;
wt++;
tt2 = gg(i, e, f, g) + h + ss1 + *w;
w++;
d = c;
c = rol32(b, 9);
b = a;
a = tt1;
h = g;
g = rol32(f, 19);
f = e;
e = p0(tt2);
}
m[0] = a ^ m[0];
m[1] = b ^ m[1];
m[2] = c ^ m[2];
m[3] = d ^ m[3];
m[4] = e ^ m[4];
m[5] = f ^ m[5];
m[6] = g ^ m[6];
m[7] = h ^ m[7];
a = b = c = d = e = f = g = h = ss1 = ss2 = tt1 = tt2 = 0;
}
static void sm3_transform(struct sm3_state *sst, u8 const *src)
{
unsigned int w[68];
unsigned int wt[64];
sm3_expand((u32 *)src, w, wt);
sm3_compress(w, wt, sst->state);
memzero_explicit(w, sizeof(w));
memzero_explicit(wt, sizeof(wt));
}
static void sm3_generic_block_fn(struct sm3_state *sst, u8 const *src,
int blocks)
{
while (blocks--) {
sm3_transform(sst, src);
src += SM3_BLOCK_SIZE;
}
}
int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
return sm3_base_do_update(desc, data, len, sm3_generic_block_fn);
}
EXPORT_SYMBOL(crypto_sm3_update);
static int sm3_final(struct shash_desc *desc, u8 *out)
{
sm3_base_do_finalize(desc, sm3_generic_block_fn);
return sm3_base_finish(desc, out);
}
int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *hash)
{
sm3_base_do_update(desc, data, len, sm3_generic_block_fn);
return sm3_final(desc, hash);
}
EXPORT_SYMBOL(crypto_sm3_finup);
static struct shash_alg sm3_alg = {
.digestsize = SM3_DIGEST_SIZE,
.init = sm3_base_init,
.update = crypto_sm3_update,
.final = sm3_final,
.finup = crypto_sm3_finup,
.descsize = sizeof(struct sm3_state),
.base = {
.cra_name = "sm3",
.cra_driver_name = "sm3-generic",
.cra_flags = CRYPTO_ALG_TYPE_SHASH,
.cra_blocksize = SM3_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int __init sm3_generic_mod_init(void)
{
return crypto_register_shash(&sm3_alg);
}
static void __exit sm3_generic_mod_fini(void)
{
crypto_unregister_shash(&sm3_alg);
}
module_init(sm3_generic_mod_init);
module_exit(sm3_generic_mod_fini);
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("SM3 Secure Hash Algorithm");
MODULE_ALIAS_CRYPTO("sm3");
MODULE_ALIAS_CRYPTO("sm3-generic");

40
include/crypto/sm3.h Normal file
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@ -0,0 +1,40 @@
/*
* Common values for SM3 algorithm
*/
#ifndef _CRYPTO_SM3_H
#define _CRYPTO_SM3_H
#include <linux/types.h>
#define SM3_DIGEST_SIZE 32
#define SM3_BLOCK_SIZE 64
#define SM3_T1 0x79CC4519
#define SM3_T2 0x7A879D8A
#define SM3_IVA 0x7380166f
#define SM3_IVB 0x4914b2b9
#define SM3_IVC 0x172442d7
#define SM3_IVD 0xda8a0600
#define SM3_IVE 0xa96f30bc
#define SM3_IVF 0x163138aa
#define SM3_IVG 0xe38dee4d
#define SM3_IVH 0xb0fb0e4e
extern const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE];
struct sm3_state {
u32 state[SM3_DIGEST_SIZE / 4];
u64 count;
u8 buffer[SM3_BLOCK_SIZE];
};
struct shash_desc;
extern int crypto_sm3_update(struct shash_desc *desc, const u8 *data,
unsigned int len);
extern int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *hash);
#endif

117
include/crypto/sm3_base.h Normal file
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@ -0,0 +1,117 @@
/*
* 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;
}