Re: [PATCH v2] crypto: inside_secure - Change swab to swab32

[Antoine Tenart <atenart@kernel.org>]

Quoting Peter Harliman Liem (2022-09-06 04:51:28)
> The use of swab() is causing failures in 64-bit arch, as it
> translates to __swab64() instead of the intended __swab32().
> It eventually causes wrong results in xcbcmac & cmac algo.
> 
> Fixes: 78cf1c8bfcb8 ("crypto: inside-secure - Move ipad/opad into safexcel_context")
> Signed-off-by: Peter Harliman Liem <pliem@maxlinear.com>

Acked-by: Antoine Tenart <atenart@kernel.org>

Thanks!

> ---
> v2:
>  Add fixes tag
> 
>  drivers/crypto/inside-secure/safexcel_hash.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/crypto/inside-secure/safexcel_hash.c b/drivers/crypto/inside-secure/safexcel_hash.c
> index bc60b5802256..2124416742f8 100644
> --- a/drivers/crypto/inside-secure/safexcel_hash.c
> +++ b/drivers/crypto/inside-secure/safexcel_hash.c
> @@ -383,7 +383,7 @@ static int safexcel_ahash_send_req(struct crypto_async_request *async, int ring,
>                                         u32 x;
>  
>                                         x = ipad[i] ^ ipad[i + 4];
> -                                       cache[i] ^= swab(x);
> +                                       cache[i] ^= swab32(x);
>                                 }
>                         }
>                         cache_len = AES_BLOCK_SIZE;
> @@ -821,7 +821,7 @@ static int safexcel_ahash_final(struct ahash_request *areq)
>                         u32 *result = (void *)areq->result;
>  
>                         /* K3 */
> -                       result[i] = swab(ctx->base.ipad.word[i + 4]);
> +                       result[i] = swab32(ctx->base.ipad.word[i + 4]);
>                 }
>                 areq->result[0] ^= 0x80;                        // 10- padding
>                 crypto_cipher_encrypt_one(ctx->kaes, areq->result, areq->result);
> @@ -2106,7 +2106,7 @@ static int safexcel_xcbcmac_setkey(struct crypto_ahash *tfm, const u8 *key,
>         crypto_cipher_encrypt_one(ctx->kaes, (u8 *)key_tmp + AES_BLOCK_SIZE,
>                 "\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3\x3");
>         for (i = 0; i < 3 * AES_BLOCK_SIZE / sizeof(u32); i++)
> -               ctx->base.ipad.word[i] = swab(key_tmp[i]);
> +               ctx->base.ipad.word[i] = swab32(key_tmp[i]);
>  
>         crypto_cipher_clear_flags(ctx->kaes, CRYPTO_TFM_REQ_MASK);
>         crypto_cipher_set_flags(ctx->kaes, crypto_ahash_get_flags(tfm) &
> @@ -2189,7 +2189,7 @@ static int safexcel_cmac_setkey(struct crypto_ahash *tfm, const u8 *key,
>                 return ret;
>  
>         for (i = 0; i < len / sizeof(u32); i++)
> -               ctx->base.ipad.word[i + 8] = swab(aes.key_enc[i]);
> +               ctx->base.ipad.word[i + 8] = swab32(aes.key_enc[i]);
>  
>         /* precompute the CMAC key material */
>         crypto_cipher_clear_flags(ctx->kaes, CRYPTO_TFM_REQ_MASK);
> -- 
> 2.17.1
>