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crypto: gcm - Use GHASH digest algorithm

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Remove the dedicated GHASH implementation in GCM, and uses the GHASH
digest algorithm instead. This will make GCM uses hardware accelerated
GHASH implementation automatically if available.

ahash instead of shash interface is used, because some hardware
accelerated GHASH implementation needs asynchronous interface.

Signed-off-by: Huang Ying <[email protected]>
Signed-off-by: Herbert Xu <[email protected]>
This commit is contained in:
Huang Ying 2009-08-06 15:34:26 +10:00 • committed by Herbert Xu
commit 9382d97af5
2 changed files with 408 additions and 174 deletions
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2
crypto/Kconfig
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@ -157,7 +157,7 @@ config CRYPTO_GCM
tristate "GCM/GMAC support"
select CRYPTO_CTR
select CRYPTO_AEAD
select CRYPTO_GF128MUL
select CRYPTO_GHASH
help
Support for Galois/Counter Mode (GCM) and Galois Message
Authentication Code (GMAC). Required for IPSec.