[CRYPTO] api: Add aead crypto type

This patch adds crypto_aead which is the interface for AEAD
(Authenticated Encryption with Associated Data) algorithms.

AEAD algorithms perform authentication and encryption in one
step.  Traditionally users (such as IPsec) would use two
different crypto algorithms to perform these.  With AEAD
this comes down to one algorithm and one operation.

Of course if traditional algorithms were used we'd still
be doing two operations underneath.  However, real AEAD
algorithms may allow the underlying operations to be
optimised as well.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

1 files changed, 4 insertions, 0 deletions

diff --git a/crypto/Kconfig b/crypto/Kconfig
index 981497c89752..f42bc7715f48 100644
--- a/crypto/Kconfig
+++ b/crypto/Kconfig
@@ -28,6 +28,10 @@ config CRYPTO_ABLKCIPHER
         tristate
         select CRYPTO_BLKCIPHER
 
+config CRYPTO_AEAD
+        tristate
+        select CRYPTO_ALGAPI
+
 config CRYPTO_BLKCIPHER
         tristate
         select CRYPTO_ALGAPI