crypto: aes - create AES library based on the fixed time AES code
Take the existing small footprint and mostly time invariant C code
and turn it into a AES library that can be used for non-performance
critical, casual use of AES, and as a fallback for, e.g., SIMD code
that needs a secondary path that can be taken in contexts where the
SIMD unit is off limits (e.g., in hard interrupts taken from kernel
context)
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index e801450..091ebbb 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -1066,6 +1066,9 @@
comment "Ciphers"
+config CRYPTO_LIB_AES
+ tristate
+
config CRYPTO_AES
tristate "AES cipher algorithms"
select CRYPTO_ALGAPI
@@ -1089,6 +1092,7 @@
config CRYPTO_AES_TI
tristate "Fixed time AES cipher"
select CRYPTO_ALGAPI
+ select CRYPTO_LIB_AES
help
This is a generic implementation of AES that attempts to eliminate
data dependent latencies as much as possible without affecting
