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Commit cbc86b91 authored by Herbert Xu's avatar Herbert Xu
Browse files

crypto: shash - Fix async finup handling of null digest 



When shash_ahash_finup encounters a null request, we end up not
calling the underlying final function.  This patch fixes that.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent fa649664

crypto/shash.c

+7 −2
Original line number Diff line number Diff line
@@ -240,12 +240,17 @@ int shash_ahash_finup(struct ahash_request *req, struct shash_desc *desc) 
	struct crypto_hash_walk walk;

	int nbytes;



	for (nbytes = crypto_hash_walk_first(req, &walk); nbytes > 0;

	     nbytes = crypto_hash_walk_done(&walk, nbytes))

	nbytes = crypto_hash_walk_first(req, &walk);

	if (!nbytes)

		return crypto_shash_final(desc, req->result);



	do {

		nbytes = crypto_hash_walk_last(&walk) ?

			 crypto_shash_finup(desc, walk.data, nbytes,

					    req->result) :

			 crypto_shash_update(desc, walk.data, nbytes);

		nbytes = crypto_hash_walk_done(&walk, nbytes);

	} while (nbytes > 0);



	return nbytes;

}