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| author | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2016-10-11 19:15:20 +0100 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2016-10-21 11:03:46 +0800 |
| commit | 58010fa6f71c9577922b22e46014b95a4ec80fa0 (patch) | |
| tree | b03da5672e08566b0a812791540a3510575b06e4 | |
| parent | caf4b9e2b326cc2a5005a5c557274306536ace61 (diff) | |
| download | linux-58010fa6f71c9577922b22e46014b95a4ec80fa0.tar.bz2 | |
crypto: arm/aes-ce - fix for big endian
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: 86464859cc77 ("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>
| -rw-r--r-- | arch/arm/crypto/aes-ce-glue.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/crypto/aes-ce-glue.c b/arch/arm/crypto/aes-ce-glue.c index aef022a87c53..04410d9f5e72 100644 --- a/arch/arm/crypto/aes-ce-glue.c +++ b/arch/arm/crypto/aes-ce-glue.c @@ -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]; |