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crypto: sm3 - make dependent on sm3 library

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SM3 generic library is stand-alone implementation, it is necessary
making the sm3-generic implementation to depends on SM3 library.
The functions crypto_sm3_*() provided by sm3_generic is no longer
exported.

Signed-off-by: Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Tianjia Zhang 2022-01-07 20:06:58 +08:00 committed by Herbert Xu
parent 114004696b
commit b4784a45ea
3 changed files with 16 additions and 137 deletions
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1
crypto/Kconfig
View file

@ -999,6 +999,7 @@ config CRYPTO_SHA3
config CRYPTO_SM3
tristate "SM3 digest algorithm"
select CRYPTO_HASH
select CRYPTO_LIB_SM3
help
SM3 secure hash function as defined by OSCCA GM/T 0004-2012 SM3).
It is part of the Chinese Commercial Cryptography suite.

142
crypto/sm3_generic.c
View file

@ -5,6 +5,7 @@
*
* Copyright (C) 2017 ARM Limited or its affiliates.
* Written by Gilad Ben-Yossef <gilad@benyossef.com>
* Copyright (C) 2021 Tianjia Zhang <tianjia.zhang@linux.alibaba.com>
*/
#include <crypto/internal/hash.h>
@ -26,143 +27,29 @@ const u8 sm3_zero_message_hash[SM3_DIGEST_SIZE] = {
};
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 & 31)), 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,
static 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);
sm3_update(shash_desc_ctx(desc), data, len);
return 0;
}
EXPORT_SYMBOL(crypto_sm3_update);
int crypto_sm3_final(struct shash_desc *desc, u8 *out)
static int crypto_sm3_final(struct shash_desc *desc, u8 *out)
{
sm3_base_do_finalize(desc, sm3_generic_block_fn);
return sm3_base_finish(desc, out);
sm3_final(shash_desc_ctx(desc), out);
return 0;
}
EXPORT_SYMBOL(crypto_sm3_final);
int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
static 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 crypto_sm3_final(desc, hash);
struct sm3_state *sctx = shash_desc_ctx(desc);
if (len)
sm3_update(sctx, data, len);
sm3_final(sctx, hash);
return 0;
}
EXPORT_SYMBOL(crypto_sm3_finup);
static struct shash_alg sm3_alg = {
.digestsize = SM3_DIGEST_SIZE,
@ -174,6 +61,7 @@ static struct shash_alg sm3_alg = {
.base = {
.cra_name = "sm3",
.cra_driver_name = "sm3-generic",
.cra_priority = 100,
.cra_blocksize = SM3_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}

10
include/crypto/sm3.h
View file

@ -35,16 +35,6 @@ struct sm3_state {
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_final(struct shash_desc *desc, u8 *out);
extern int crypto_sm3_finup(struct shash_desc *desc, const u8 *data,
unsigned int len, u8 *hash);
/*
* Stand-alone implementation of the SM3 algorithm. It is designed to
* have as little dependencies as possible so it can be used in the