[PATCH 0/4] crypto: arm64/aes-blk - cleanups and optimizations for XTS/CTS-CBC

Ard Biesheuvel ard.biesheuvel at linaro.org
Thu Sep 20 07:13:59 PDT 2018


On 10 September 2018 at 07:41, Ard Biesheuvel <ard.biesheuvel at linaro.org> wrote:
> Some cleanups and optimizations for the arm64  AES skcipher routines.
>
> Patch #1 fixes the peculiar use of u8 arrays to refer to AES round keys,
> which are natively arrays of u32.
>
> Patch #2 partially reverts the use of NEON yield calls, which is not
> needed for skciphers.
>
> Patch #3 adds support for cts(cbc(aes)) in the NEON chaining mode handling.
>
> Patch #4 tweaks the XTS handling to remove a literal load from the inner
> loop.
>
> Cc: Eric Biggers <ebiggers at google.com>
> Cc: Theodore Ts'o <tytso at mit.edu>
> Cc: Steve Capper <steve.capper at arm.com>
>
> Ard Biesheuvel (4):
>   crypto: arm64/aes-blk - remove pointless (u8 *) casts
>   crypto: arm64/aes-blk - revert NEON yield for skciphers
>   crypto: arm64/aes-blk - add support for CTS-CBC mode
>   crypto: aes/arm64-blk - improve XTS mask handling
>
>  arch/arm64/crypto/aes-ce.S    |   5 +
>  arch/arm64/crypto/aes-glue.c  | 212 +++++++++--
>  arch/arm64/crypto/aes-modes.S | 400 ++++++++++----------
>  arch/arm64/crypto/aes-neon.S  |   6 +
>  4 files changed, 406 insertions(+), 217 deletions(-)
>

Eric, any thoughts on this?



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