commit 7eddf95ec5440d60f10963f453e27f82f394044e
author Herbert Xu <herbert@gondor.apana.org.au> Sun Jul 12 21:25:20 2009 +0800
committer Herbert Xu <herbert@gondor.apana.org.au> Tue Jul 14 12:58:08 2009 +0800
tree 4b1ba4bbf01f381a45d5bd6d26811f51ab81a3ff
parent 6941c3a0aabb6ad4167827360f384e9daed7dd7f

crypto: shash - Export async functions

This patch exports the async functions so that they can be reused
by cryptd when it switches over to using shash.

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

crypto/shash.c

diff --git a/crypto/shash.c b/crypto/shash.c
index d8e0f8f..3b1b06b 100644
--- a/crypto/shash.c
+++ b/crypto/shash.c
@@ -202,9 +202,8 @@
 	return crypto_shash_init(desc);
 }
 
-static int shash_async_update(struct ahash_request *req)
+int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc)
 {
-	struct shash_desc *desc = ahash_request_ctx(req);
 	struct crypto_hash_walk walk;
 	int nbytes;
 
@@ -214,13 +213,19 @@
 
 	return nbytes;
 }
+EXPORT_SYMBOL_GPL(shash_ahash_update);
+
+static int shash_async_update(struct ahash_request *req)
+{
+	return shash_ahash_update(req, ahash_request_ctx(req));
+}
 
 static int shash_async_final(struct ahash_request *req)
 {
 	return crypto_shash_final(ahash_request_ctx(req), req->result);
 }
 
-static int shash_async_digest(struct ahash_request *req)
+int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc)
 {
 	struct scatterlist *sg = req->src;
 	unsigned int offset = sg->offset;
@@ -228,35 +233,32 @@
 	int err;
 
 	if (nbytes < min(sg->length, ((unsigned int)(PAGE_SIZE)) - offset)) {
-		struct crypto_shash **ctx =
-			crypto_ahash_ctx(crypto_ahash_reqtfm(req));
-		struct shash_desc *desc = ahash_request_ctx(req);
 		void *data;
 
-		desc->tfm = *ctx;
-		desc->flags = req->base.flags;
-
 		data = crypto_kmap(sg_page(sg), 0);
 		err = crypto_shash_digest(desc, data + offset, nbytes,
 					  req->result);
 		crypto_kunmap(data, 0);
 		crypto_yield(desc->flags);
-		goto out;
-	}
+	} else
+		err = crypto_shash_init(desc) ?:
+		      shash_ahash_update(req, desc) ?:
+		      crypto_shash_final(desc, req->result);
 
-	err = shash_async_init(req);
-	if (err)
-		goto out;
-
-	err = shash_async_update(req);
-	if (err)
-		goto out;
-
-	err = shash_async_final(req);
-
-out:
 	return err;
 }
+EXPORT_SYMBOL_GPL(shash_ahash_digest);
+
+static int shash_async_digest(struct ahash_request *req)
+{
+	struct crypto_shash **ctx = crypto_ahash_ctx(crypto_ahash_reqtfm(req));
+	struct shash_desc *desc = ahash_request_ctx(req);
+
+	desc->tfm = *ctx;
+	desc->flags = req->base.flags;
+
+	return shash_ahash_digest(req, desc);
+}
 
 static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm)
 {

include/crypto/internal/hash.h

diff --git a/include/crypto/internal/hash.h b/include/crypto/internal/hash.h
index 2d1b10f..6e28349 100644
--- a/include/crypto/internal/hash.h
+++ b/include/crypto/internal/hash.h
@@ -63,6 +63,9 @@
 
 struct shash_alg *shash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
 
+int shash_ahash_update(struct ahash_request *req, struct shash_desc *desc);
+int shash_ahash_digest(struct ahash_request *req, struct shash_desc *desc);
+
 static inline void *crypto_ahash_ctx(struct crypto_ahash *tfm)
 {
 	return crypto_tfm_ctx(&tfm->base);