Commit 85cc4243 authored by Hannes Reinecke's avatar Hannes Reinecke Committed by Jens Axboe
Browse files

crypto: add crypto_has_shash() 



Add helper function to determine if a given synchronous hash is supported.

Signed-off-by: default avatarHannes Reinecke <hare@suse.de>
Reviewed-by: default avatarSagi Grimberg <sagi@grimberg.me>
Reviewed-by: default avatarChaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: default avatarHimanshu Madhani <himanshu.madhani@oracle.com>
Acked-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent e41f8c02

crypto/shash.c

+6 −0
Original line number Diff line number Diff line
@@ -521,6 +521,12 @@ struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type, 
}

EXPORT_SYMBOL_GPL(crypto_alloc_shash);



int crypto_has_shash(const char *alg_name, u32 type, u32 mask)

{

	return crypto_type_has_alg(alg_name, &crypto_shash_type, type, mask);

}

EXPORT_SYMBOL_GPL(crypto_has_shash);



static int shash_prepare_alg(struct shash_alg *alg)

{

	struct crypto_alg *base = &alg->base;

include/crypto/hash.h

+2 −0
Original line number Diff line number Diff line
@@ -718,6 +718,8 @@ static inline void ahash_request_set_crypt(struct ahash_request *req, 
struct crypto_shash *crypto_alloc_shash(const char *alg_name, u32 type,

					u32 mask);



int crypto_has_shash(const char *alg_name, u32 type, u32 mask);



static inline struct crypto_tfm *crypto_shash_tfm(struct crypto_shash *tfm)

{

	return &tfm->base;