diff options
| author | Nathan Huckleberry <nhuck@google.com> | 2022-05-20 18:15:00 +0000 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2022-06-10 16:40:18 +0800 |
| commit | 9d2c0b485c46c7c5f781067c60300def5d1365cb (patch) | |
| tree | 66e8f069b9f6b51d2ebeff326129d85c9134c23b /arch/arm64/crypto/Kconfig | |
| parent | 34f7f6c3011276313383099156be287ac745bcea (diff) | |
crypto: arm64/polyval - Add PMULL accelerated implementation of POLYVAL
Add hardware accelerated version of POLYVAL for ARM64 CPUs with
Crypto Extensions support.
This implementation is accelerated using PMULL instructions to perform
the finite field computations. For added efficiency, 8 blocks of the
message are processed simultaneously by precomputing the first 8
powers of the key.
Karatsuba multiplication is used instead of Schoolbook multiplication
because it was found to be slightly faster on ARM64 CPUs. Montgomery
reduction must be used instead of Barrett reduction due to the
difference in modulus between POLYVAL's field and other finite fields.
More information on POLYVAL can be found in the HCTR2 paper:
"Length-preserving encryption with HCTR2":
https://eprint.iacr.org/2021/1441.pdf
Signed-off-by: Nathan Huckleberry <nhuck@google.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/arm64/crypto/Kconfig')
| -rw-r--r-- | arch/arm64/crypto/Kconfig | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/crypto/Kconfig b/arch/arm64/crypto/Kconfig index 74d5bed9394f..4391a463abd7 100644 --- a/arch/arm64/crypto/Kconfig +++ b/arch/arm64/crypto/Kconfig @@ -72,6 +72,11 @@ config CRYPTO_GHASH_ARM64_CE select CRYPTO_GF128MUL select CRYPTO_LIB_AES +config CRYPTO_POLYVAL_ARM64_CE + tristate "POLYVAL using ARMv8 Crypto Extensions (for HCTR2)" + depends on KERNEL_MODE_NEON + select CRYPTO_POLYVAL + config CRYPTO_CRCT10DIF_ARM64_CE tristate "CRCT10DIF digest algorithm using PMULL instructions" depends on KERNEL_MODE_NEON && CRC_T10DIF |