From: Eric Biggers <ebiggers@xxxxxxxxxx>
Currently, ahash spawns are initialized by using ahash_attr_alg() or
crypto_find_alg() to look up the ahash algorithm, then calling
crypto_init_ahash_spawn().
This is different from how skcipher, aead, and akcipher spawns are
initialized (they use crypto_grab_*()), and for no good reason. This
difference introduces unnecessary complexity.
The crypto_grab_*() functions used to have some problems, like not
holding a reference to the algorithm and requiring the caller to
initialize spawn->base.inst. But those problems are fixed now.
So, let's introduce crypto_grab_ahash() so that we can convert all
templates to the same way of initializing their spawns.
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
---
crypto/ahash.c | 9 +++++++++
include/crypto/internal/hash.h | 10 ++++++++++
2 files changed, 19 insertions(+)
diff --git a/crypto/ahash.c b/crypto/ahash.c
index 181bd851b429..e98a1398ed7f 100644
--- a/crypto/ahash.c
+++ b/crypto/ahash.c
@@ -556,6 +556,15 @@ const struct crypto_type crypto_ahash_type = {
};
EXPORT_SYMBOL_GPL(crypto_ahash_type);
+int crypto_grab_ahash(struct crypto_ahash_spawn *spawn,
+ struct crypto_instance *inst,
+ const char *name, u32 type, u32 mask)
+{
+ spawn->base.frontend = &crypto_ahash_type;
+ return crypto_grab_spawn(&spawn->base, inst, name, type, mask);
+}
+EXPORT_SYMBOL_GPL(crypto_grab_ahash);
+
struct crypto_ahash *crypto_alloc_ahash(const char *alg_name, u32 type,
u32 mask)
{
diff --git a/include/crypto/internal/hash.h b/include/crypto/internal/hash.h
index 4d1a0d8e4f3a..e1024fa0032f 100644
--- a/include/crypto/internal/hash.h
+++ b/include/crypto/internal/hash.h
@@ -109,11 +109,21 @@ int crypto_init_ahash_spawn(struct crypto_ahash_spawn *spawn,
struct hash_alg_common *alg,
struct crypto_instance *inst);
+int crypto_grab_ahash(struct crypto_ahash_spawn *spawn,
+ struct crypto_instance *inst,
+ const char *name, u32 type, u32 mask);
+
static inline void crypto_drop_ahash(struct crypto_ahash_spawn *spawn)
{
crypto_drop_spawn(&spawn->base);
}
+static inline struct hash_alg_common *crypto_spawn_ahash_alg(
+ struct crypto_ahash_spawn *spawn)
+{
+ return __crypto_hash_alg_common(spawn->base.alg);
+}
+
struct hash_alg_common *ahash_attr_alg(struct rtattr *rta, u32 type, u32 mask);
int crypto_register_shash(struct shash_alg *alg);
--
2.24.1
