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crypto: sm4 - export sm4 constant arrays

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Export the constant arrays fk, ck, sbox of the SM4 algorithm, and
add the 'crypto_sm4_' prefix, where sbox is used in the SM4 NEON
implementation for the tbl/tbx instruction to replace the S-BOX,
and the fk, ck arrays are used in the SM4 CE implementation. Use
the sm4ekey instruction to speed up key expansion operations.

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 2022-03-15 17:44:51 +08:00 committed by Herbert Xu
parent d2825fa936
commit 73c919d314
2 changed files with 13 additions and 1 deletions
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10
crypto/sm4.c
View File

@ -11,7 +11,7 @@
#include <asm/unaligned.h>
#include <crypto/sm4.h>
static const u32 fk[4] = {
static const u32 ____cacheline_aligned fk[4] = {
0xa3b1bac6, 0x56aa3350, 0x677d9197, 0xb27022dc
};
@ -61,6 +61,14 @@ static const u8 ____cacheline_aligned sbox[256] = {
0x79, 0xee, 0x5f, 0x3e, 0xd7, 0xcb, 0x39, 0x48
};
extern const u32 crypto_sm4_fk[4] __alias(fk);
extern const u32 crypto_sm4_ck[32] __alias(ck);
extern const u8 crypto_sm4_sbox[256] __alias(sbox);
EXPORT_SYMBOL(crypto_sm4_fk);
EXPORT_SYMBOL(crypto_sm4_ck);
EXPORT_SYMBOL(crypto_sm4_sbox);
static inline u32 sm4_t_non_lin_sub(u32 x)
{
u32 out;

4
include/crypto/sm4.h
View File

@ -21,6 +21,10 @@ struct sm4_ctx {
u32 rkey_dec[SM4_RKEY_WORDS];
};
extern const u32 crypto_sm4_fk[];
extern const u32 crypto_sm4_ck[];
extern const u8 crypto_sm4_sbox[];
/**
* sm4_expandkey - Expands the SM4 key as described in GB/T 32907-2016
* @ctx: The location where the computed key will be stored.