Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-11-11 14:42:24 +00:00
Code Issues Packages Projects Releases Wiki Activity

crypto: arm/aes-ce - fix for big endian

Browse Source 
The AES key schedule generation is mostly endian agnostic, with the
exception of the rotation and the incorporation of the round constant
at the start of each round. So implement a big endian specific version
of that part to make the whole routine big endian compatible.

Fixes: 86464859cc ("crypto: arm - AES in ECB/CBC/CTR/XTS modes using ARMv8 Crypto Extensions")
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2016-10-11 19:15:20 +01:00 committed by Herbert Xu
parent caf4b9e2b3
commit 58010fa6f7
1 changed files with 5 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/arm/crypto/aes-ce-glue.c
View File

@ -88,8 +88,13 @@ static int ce_aes_expandkey(struct crypto_aes_ctx *ctx, const u8 *in_key,
u32 *rki = ctx->key_enc + (i * kwords);
u32 *rko = rki + kwords;
#ifndef CONFIG_CPU_BIG_ENDIAN
rko[0] = ror32(ce_aes_sub(rki[kwords - 1]), 8);
rko[0] = rko[0] ^ rki[0] ^ rcon[i];
#else
rko[0] = rol32(ce_aes_sub(rki[kwords - 1]), 8);
rko[0] = rko[0] ^ rki[0] ^ (rcon[i] << 24);
#endif
rko[1] = rko[0] ^ rki[1];
rko[2] = rko[1] ^ rki[2];
rko[3] = rko[2] ^ rki[3];