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crypto: Create sm4_subword

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Allows sharing of sm4_subword between different targets.

Signed-off-by: Max Chou <max.chou@sifive.com>
Reviewed-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Max Chou <max.chou@sifive.com>
Message-ID: <20230711165917.2629866-14-max.chou@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Max Chou 2023-07-12 00:59:12 +08:00 committed by Alistair Francis
parent 767eb03548
commit f6ef550fe5
2 changed files with 10 additions and 8 deletions
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8
include/crypto/sm4.h
View File

@ -3,4 +3,12 @@
extern const uint8_t sm4_sbox[256];
static inline uint32_t sm4_subword(uint32_t word)
{
return sm4_sbox[word & 0xff] |
sm4_sbox[(word >> 8) & 0xff] << 8 |
sm4_sbox[(word >> 16) & 0xff] << 16 |
sm4_sbox[(word >> 24) & 0xff] << 24;
}
#endif

10
target/arm/tcg/crypto_helper.c
View File

@ -614,10 +614,7 @@ static void do_crypto_sm4e(uint64_t *rd, uint64_t *rn, uint64_t *rm)
CR_ST_WORD(d, (i + 3) % 4) ^
CR_ST_WORD(n, i);
t = sm4_sbox[t & 0xff] |
sm4_sbox[(t >> 8) & 0xff] << 8 |
sm4_sbox[(t >> 16) & 0xff] << 16 |
sm4_sbox[(t >> 24) & 0xff] << 24;
t = sm4_subword(t);
CR_ST_WORD(d, i) ^= t ^ rol32(t, 2) ^ rol32(t, 10) ^ rol32(t, 18) ^
rol32(t, 24);
@ -651,10 +648,7 @@ static void do_crypto_sm4ekey(uint64_t *rd, uint64_t *rn, uint64_t *rm)
CR_ST_WORD(d, (i + 3) % 4) ^
CR_ST_WORD(m, i);
t = sm4_sbox[t & 0xff] |
sm4_sbox[(t >> 8) & 0xff] << 8 |
sm4_sbox[(t >> 16) & 0xff] << 16 |
sm4_sbox[(t >> 24) & 0xff] << 24;
t = sm4_subword(t);
CR_ST_WORD(d, i) ^= t ^ rol32(t, 13) ^ rol32(t, 23);
}