• Ard Biesheuvel's avatar
    crypto: ccm - switch to separate cbcmac driver · f15f05b0
    Ard Biesheuvel authored
    Update the generic CCM driver to defer CBC-MAC processing to a
    dedicated CBC-MAC ahash transform rather than open coding this
    transform (and much of the associated scatterwalk plumbing) in
    the CCM driver itself.
    This cleans up the code considerably, but more importantly, it allows
    the use of alternative CBC-MAC implementations that don't suffer from
    performance degradation due to significant setup time (e.g., the NEON
    based AES code needs to enable/disable the NEON, and load the S-box
    into 16 SIMD registers, which cannot be amortized over the entire input
    when using the cipher interface)
    Signed-off-by: default avatarArd Biesheuvel <ard.biesheuvel@linaro.org>
    Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
ccm.c 25.3 KB