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crypto: Add aesdec_IMC

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Add a primitive for InvMixColumns.

Acked-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-06-02 02:01:23 -07:00
parent 04e1f30eed
commit 5b41deb310
3 changed files with 79 additions and 0 deletions
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18
include/crypto/aes-round.h
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@ -59,6 +59,24 @@ static inline void aesenc_SB_SR_AK(AESState *r, const AESState *st,
}
}
/*
* Perform InvMixColumns.
*/
void aesdec_IMC_gen(AESState *ret, const AESState *st);
void aesdec_IMC_genrev(AESState *ret, const AESState *st);
static inline void aesdec_IMC(AESState *r, const AESState *st, bool be)
{
if (HAVE_AES_ACCEL) {
aesdec_IMC_accel(r, st, be);
} else if (HOST_BIG_ENDIAN == be) {
aesdec_IMC_gen(r, st);
} else {
aesdec_IMC_genrev(r, st);
}
}
/*
* Perform InvSubBytes + InvShiftRows + AddRoundKey.
*/