crypto: shash - Add shash_register_instance

This patch adds shash_register_instance so that shash instances
can be registered without bypassing the shash checks applied to
normal algorithms.

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

diff --git a/crypto/shash.c b/crypto/shash.c
index 21bcff6..3d24242 100644 (file)
--- a/crypto/shash.c
+++ b/crypto/shash.c
@@ -480,7 +480,7 @@ struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,
 }
 EXPORT_SYMBOL_GPL(crypto_alloc_shash);
 
-int crypto_register_shash(struct shash_alg *alg)
+static int shash_prepare_alg(struct shash_alg *alg)
 {
        struct crypto_alg *base = &alg->base;
 
@@ -491,6 +491,17 @@ int crypto_register_shash(struct shash_alg *alg)
        base->cra_type = &crypto_shash_type;
        base->cra_flags &= ~CRYPTO_ALG_TYPE_MASK;
        base->cra_flags |= CRYPTO_ALG_TYPE_SHASH;
+       return 0;
+}
+
+int crypto_register_shash(struct shash_alg *alg)
+{
+       struct crypto_alg *base = &alg->base;
+       int err;
+
+       err = shash_prepare_alg(alg);
+       if (err)
+               return err;
 
        return crypto_register_alg(base);
 }
@@ -502,6 +513,19 @@ int crypto_unregister_shash(struct shash_alg *alg)
 }
 EXPORT_SYMBOL_GPL(crypto_unregister_shash);
 
+int shash_register_instance(struct crypto_template *tmpl,
+                           struct shash_instance *inst)
+{
+       int err;
+
+       err = shash_prepare_alg(&inst->alg);
+       if (err)
+               return err;
+
+       return crypto_register_instance(tmpl, shash_crypto_instance(inst));
+}
+EXPORT_SYMBOL_GPL(shash_register_instance);
+
 void shash_free_instance(struct crypto_instance *inst)
 {
        crypto_drop_spawn(crypto_instance_ctx(inst));

diff --git a/include/crypto/internal/hash.h b/include/crypto/internal/hash.h
index e2ab35a..fa5c9fb 100644 (file)
--- a/include/crypto/internal/hash.h
+++ b/include/crypto/internal/hash.h
@@ -53,7 +53,8 @@ int crypto_hash_walk_first_compat(struct hash_desc *hdesc,
 
 int crypto_register_shash(struct shash_alg *alg);
 int crypto_unregister_shash(struct shash_alg *alg);
-
+int shash_register_instance(struct crypto_template *tmpl,
+                           struct shash_instance *inst);
 void shash_free_instance(struct crypto_instance *inst);
 
 int crypto_init_shash_spawn(struct crypto_shash_spawn *spawn,