[CRYPTO] xcbc: New algorithm

This is core code of XCBC.

XCBC is an algorithm that forms a MAC algorithm out of a cipher algorithm.
For example, AES-XCBC-MAC is a MAC algorithm based on the AES cipher
algorithm.

Signed-off-by: Kazunori MIYAZAWA <miyazawa@linux-ipv6.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/crypto/Kconfig b/crypto/Kconfig
index cbae839..4495e466 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -39,6 +39,17 @@
 	  HMAC: Keyed-Hashing for Message Authentication (RFC2104).
 	  This is required for IPSec.
 
+config CRYPTO_XCBC
+	tristate "XCBC support"
+	depends on EXPERIMENTAL
+	select CRYPTO_HASH
+	select CRYPTO_MANAGER
+	help
+	  XCBC: Keyed-Hashing with encryption algorithm
+		http://www.ietf.org/rfc/rfc3566.txt
+		http://csrc.nist.gov/encryption/modes/proposedmodes/
+		 xcbc-mac/xcbc-mac-spec.pdf
+
 config CRYPTO_NULL
 	tristate "Null algorithms"
 	select CRYPTO_ALGAPI