[CRYPTO] twofish: Split out common c code
This patch splits up the twofish crypto routine into a common part ( key
setup ) which will be uses by all twofish crypto modules ( generic-c , i586
assembler and x86_64 assembler ) and generic-c part. It also creates a new
header file which will be used by all 3 modules.
This eliminates all code duplication.
Correctness was verified with the tcrypt module and automated test scripts.
Signed-off-by: Joachim Fritschi <jfritschi@freenet.de>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index ba133d5..5472f69 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -131,6 +131,7 @@
config CRYPTO_TWOFISH
tristate "Twofish cipher algorithm"
depends on CRYPTO
+ select CRYPTO_TWOFISH_COMMON
help
Twofish cipher algorithm.
@@ -142,6 +143,13 @@
See also:
<http://www.schneier.com/twofish.html>
+config CRYPTO_TWOFISH_COMMON
+ tristate
+ depends on CRYPTO
+ help
+ Common parts of the Twofish cipher algorithm shared by the
+ generic c and the assembler implementations.
+
config CRYPTO_SERPENT
tristate "Serpent cipher algorithm"
depends on CRYPTO