Commit cfbda734 authored by Herbert Xu's avatar Herbert Xu
Browse files

crypto: cryptd - Add support for cloning hashes 



Allow cryptd hashes to be cloned.  The underlying hash will be cloned.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 0303b7f5

crypto/cryptd.c

+16 −0
Original line number Diff line number Diff line
@@ -446,6 +446,21 @@ static int cryptd_hash_init_tfm(struct crypto_ahash *tfm) 
	return 0;

}



static int cryptd_hash_clone_tfm(struct crypto_ahash *ntfm,

				 struct crypto_ahash *tfm)

{

	struct cryptd_hash_ctx *nctx = crypto_ahash_ctx(ntfm);

	struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);

	struct crypto_shash *hash;



	hash = crypto_clone_shash(ctx->child);

	if (IS_ERR(hash))

		return PTR_ERR(hash);



	nctx->child = hash;

	return 0;

}



static void cryptd_hash_exit_tfm(struct crypto_ahash *tfm)

{

	struct cryptd_hash_ctx *ctx = crypto_ahash_ctx(tfm);
@@ -678,6 +693,7 @@ static int cryptd_create_hash(struct crypto_template *tmpl, struct rtattr **tb, 
	inst->alg.halg.base.cra_ctxsize = sizeof(struct cryptd_hash_ctx);



	inst->alg.init_tfm = cryptd_hash_init_tfm;

	inst->alg.clone_tfm = cryptd_hash_clone_tfm;

	inst->alg.exit_tfm = cryptd_hash_exit_tfm;



	inst->alg.init   = cryptd_hash_init_enqueue;