[CRYPTO] null: Add null blkcipher algorithm

This patch adds a null blkcipher algorithm called ecb(cipher_null) for
backwards compatibility.  Previously the null algorithm when used by
IPsec copied the data byte by byte.  This new algorithm optimises that
to a straight memcpy which lets us better measure inherent overheads in
our IPsec code.

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

1 files changed, 5 insertions, 0 deletions

diff --git a/include/crypto/internal/skcipher.h b/include/crypto/internal/skcipher.h
index 2071999d4b5e..0053f34764ff 100644
--- a/include/crypto/internal/skcipher.h
+++ b/include/crypto/internal/skcipher.h
@@ -88,5 +88,10 @@ static inline void skcipher_givcrypt_complete(
         ablkcipher_request_complete(&req->creq, err);
 }
 
+static inline u32 ablkcipher_request_flags(struct ablkcipher_request *req)
+{
+        return req->base.flags;
+}
+
 #endif  /* _CRYPTO_INTERNAL_SKCIPHER_H */