From 7613636def82092a5c7b6322078a2af832410417 Mon Sep 17 00:00:00 2001 From: Herbert Xu Date: Tue, 20 Nov 2007 17:26:06 +0800 Subject: [CRYPTO] api: Add crypto_inc and crypto_xor With the addition of more stream ciphers we need to curb the proliferation of ad-hoc xor functions. This patch creates a generic pair of functions, crypto_inc and crypto_xor which does big-endian increment and exclusive or, respectively. For optimum performance, they both use u32 operations so alignment must be as that of u32 even though the arguments are of type u8 *. Signed-off-by: Herbert Xu --- include/crypto/algapi.h | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'include/crypto') diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h index 88619f902c10..2cdb227fc39d 100644 --- a/include/crypto/algapi.h +++ b/include/crypto/algapi.h @@ -124,6 +124,10 @@ int crypto_enqueue_request(struct crypto_queue *queue, struct crypto_async_request *crypto_dequeue_request(struct crypto_queue *queue); int crypto_tfm_in_queue(struct crypto_queue *queue, struct crypto_tfm *tfm); +/* These functions require the input/output to be aligned as u32. */ +void crypto_inc(u8 *a, unsigned int size); +void crypto_xor(u8 *dst, const u8 *src, unsigned int size); + int blkcipher_walk_done(struct blkcipher_desc *desc, struct blkcipher_walk *walk, int err); int blkcipher_walk_virt(struct blkcipher_desc *desc, -- cgit v1.2.3-59-g8ed1b