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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2017-02-03 17:49:36 +0300
committerHerbert Xu <herbert@gondor.apana.org.au>2017-02-11 12:50:45 +0300
commitf15f05b0a5de667c821a9727c33bce9d1d9b26dd (patch)
tree5136af17bad0933f2aa84f2fca27ae2515b1adc8 /crypto/Kconfig
parent092acf069813a7a07371de0d05010de80d8e613b (diff)
downloadlinux-f15f05b0a5de667c821a9727c33bce9d1d9b26dd.tar.xz
crypto: ccm - switch to separate cbcmac driver
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: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'crypto/Kconfig')
-rw-r--r--crypto/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/crypto/Kconfig b/crypto/Kconfig
index 419ff5fe6939..5a51b877277e 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -263,6 +263,7 @@ comment "Authenticated Encryption with Associated Data"
config CRYPTO_CCM
tristate "CCM support"
select CRYPTO_CTR
+ select CRYPTO_HASH
select CRYPTO_AEAD
help
Support for Counter with CBC MAC. Required for IPsec.