crypto: skcipher - Add ablkcipher_walk interfaces
[linux-2.6.git] / include / crypto / algapi.h
index fc0d575..59c3e5b 100644 (file)
@@ -103,6 +103,23 @@ struct blkcipher_walk {
        unsigned int blocksize;
 };
 
+struct ablkcipher_walk {
+       struct {
+               struct page *page;
+               unsigned int offset;
+       } src, dst;
+
+       struct scatter_walk     in;
+       unsigned int            nbytes;
+       struct scatter_walk     out;
+       unsigned int            total;
+       struct list_head        buffers;
+       u8                      *iv_buffer;
+       u8                      *iv;
+       int                     flags;
+       unsigned int            blocksize;
+};
+
 extern const struct crypto_type crypto_ablkcipher_type;
 extern const struct crypto_type crypto_aead_type;
 extern const struct crypto_type crypto_blkcipher_type;
@@ -173,6 +190,12 @@ int blkcipher_walk_virt_block(struct blkcipher_desc *desc,
                              struct blkcipher_walk *walk,
                              unsigned int blocksize);
 
+int ablkcipher_walk_done(struct ablkcipher_request *req,
+                        struct ablkcipher_walk *walk, int err);
+int ablkcipher_walk_phys(struct ablkcipher_request *req,
+                        struct ablkcipher_walk *walk);
+void __ablkcipher_walk_complete(struct ablkcipher_walk *walk);
+
 static inline void *crypto_tfm_ctx_aligned(struct crypto_tfm *tfm)
 {
        return PTR_ALIGN(crypto_tfm_ctx(tfm),
@@ -283,6 +306,23 @@ static inline void blkcipher_walk_init(struct blkcipher_walk *walk,
        walk->total = nbytes;
 }
 
+static inline void ablkcipher_walk_init(struct ablkcipher_walk *walk,
+                                       struct scatterlist *dst,
+                                       struct scatterlist *src,
+                                       unsigned int nbytes)
+{
+       walk->in.sg = src;
+       walk->out.sg = dst;
+       walk->total = nbytes;
+       INIT_LIST_HEAD(&walk->buffers);
+}
+
+static inline void ablkcipher_walk_complete(struct ablkcipher_walk *walk)
+{
+       if (unlikely(!list_empty(&walk->buffers)))
+               __ablkcipher_walk_complete(walk);
+}
+
 static inline struct crypto_async_request *crypto_get_backlog(
        struct crypto_queue *queue)
 {