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util: Add InvMixColumns

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This patch adds the table implementation of the Advanced Encryption Standard (AES)
InvMixColumns transformation.

The patch is intentionally asymmetrical -- the MixColumns table is not added because
there is no known use for it at this time.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Tom Musta 2014-03-13 09:13:27 -05:00 • committed by Alexander Graf
parent 1c1a6d20e0
commit bfd8f5b754
2 changed files with 272 additions and 0 deletions
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7
include/qemu/aes.h
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@ -30,6 +30,13 @@ extern const uint8_t AES_isbox[256];
extern const uint8_t AES_shifts[16];
extern const uint8_t AES_ishifts[16];
/* AES InvMixColumns */
/* AES_imc[x][0] = [x].[0e, 09, 0d, 0b]; */
/* AES_imc[x][1] = [x].[0b, 0e, 09, 0d]; */
/* AES_imc[x][2] = [x].[0d, 0b, 0e, 09]; */
/* AES_imc[x][3] = [x].[09, 0d, 0b, 0e]; */
extern const uint32_t AES_imc[256][4];
/*
AES_Te0[x] = S [x].[02, 01, 01, 03];
AES_Te1[x] = S [x].[03, 02, 01, 01];