From: Max Chou <max.chou@xxxxxxxxxx>
Allows sharing of sm4_subword between different targets.
Signed-off-by: Max Chou <max.chou@xxxxxxxxxx>
Reviewed-by: Frank Chang <frank.chang@xxxxxxxxxx>
Reviewed-by: Richard Henderson <richard.henderson@xxxxxxxxxx>
---
include/crypto/sm4.h | 8 ++++++++
target/arm/tcg/crypto_helper.c | 10 ++--------
2 files changed, 10 insertions(+), 8 deletions(-)
diff --git a/include/crypto/sm4.h b/include/crypto/sm4.h
index 9bd3ebc62e8..de8245d8a71 100644
--- a/include/crypto/sm4.h
+++ b/include/crypto/sm4.h
@@ -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
diff --git a/target/arm/tcg/crypto_helper.c b/target/arm/tcg/crypto_helper.c
index d28690321f0..58e6c4f779c 100644
--- a/target/arm/tcg/crypto_helper.c
+++ b/target/arm/tcg/crypto_helper.c
@@ -707,10 +707,7 @@ 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);
@@ -744,10 +741,7 @@ 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);
}
--
2.40.1
