[CRYPTO] api: Add common instance initialisation code

This patch adds the helpers crypto_get_attr_alg and crypto_alloc_instance
which can be used by simple one-argument templates like hmac to process
input parameters and allocate instances.

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

1 files changed, 5 insertions, 0 deletions

diff --git a/include/crypto/algapi.h b/include/crypto/algapi.h
index b20f4bdb23ba..1a598f829417 100644
--- a/include/crypto/algapi.h
+++ b/include/crypto/algapi.h
@@ -51,6 +51,11 @@ int crypto_init_spawn(struct crypto_spawn *spawn, struct crypto_alg *alg,
 void crypto_drop_spawn(struct crypto_spawn *spawn);
 struct crypto_tfm *crypto_spawn_tfm(struct crypto_spawn *spawn);
 
+struct crypto_alg *crypto_get_attr_alg(void *param, unsigned int len,
+                                       u32 type, u32 mask);
+struct crypto_instance *crypto_alloc_instance(const char *name,
+                                              struct crypto_alg *alg);
+
 static inline void *crypto_instance_ctx(struct crypto_instance *inst)
 {
         return inst->__ctx;