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 <[email protected]>
---
crypto/shash.c | 42 +++++++++++++++++++++--------------------
include/crypto/internal/hash.h | 3 ++
2 files changed, 25 insertions(+), 20 deletions(-)
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 @@ static int shash_async_init(struct ahash_request *req)
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 @@ static int shash_async_update(struct ahash_request *req)
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;
@@ -228,34 +233,31 @@ static int shash_async_digest(struct ahash_request *req)
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;
+ return err;
+}
+EXPORT_SYMBOL_GPL(shash_ahash_digest);
- err = shash_async_update(req);
- if (err)
- goto out;
+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);
- err = shash_async_final(req);
+ desc->tfm = *ctx;
+ desc->flags = req->base.flags;
-out:
- return err;
+ return shash_ahash_digest(req, desc);
}
static void crypto_exit_shash_ops_async(struct crypto_tfm *tfm)
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 @@ int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,
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);