Commit 8cf4c341 authored by Herbert Xu's avatar Herbert Xu
Browse files

crypto: hmac - Add export_core and import_core 



Add export_import and import_core so that hmac can be used as a
fallback by block-only drivers.

Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent a05a8bc5

crypto/hmac.c

+19 −0
Original line number Diff line number Diff line
@@ -90,6 +90,22 @@ static int hmac_import(struct shash_desc *pdesc, const void *in) 
	return crypto_shash_import(desc, in);

}



static int hmac_export_core(struct shash_desc *pdesc, void *out)

{

	struct shash_desc *desc = shash_desc_ctx(pdesc);



	return crypto_shash_export_core(desc, out);

}



static int hmac_import_core(struct shash_desc *pdesc, const void *in)

{

	const struct hmac_ctx *tctx = crypto_shash_ctx(pdesc->tfm);

	struct shash_desc *desc = shash_desc_ctx(pdesc);



	desc->tfm = tctx->hash;

	return crypto_shash_import_core(desc, in);

}



static int hmac_init(struct shash_desc *pdesc)

{

	const struct hmac_ctx *tctx = crypto_shash_ctx(pdesc->tfm);
@@ -177,6 +193,7 @@ static int hmac_create(struct crypto_template *tmpl, struct rtattr **tb) 
		return -ENOMEM;

	spawn = shash_instance_ctx(inst);



	mask |= CRYPTO_AHASH_ALG_NO_EXPORT_CORE;

	err = crypto_grab_shash(spawn, shash_crypto_instance(inst),

				crypto_attr_alg_name(tb[1]), 0, mask);

	if (err)
@@ -211,6 +228,8 @@ static int hmac_create(struct crypto_template *tmpl, struct rtattr **tb) 
	inst->alg.finup = hmac_finup;

	inst->alg.export = hmac_export;

	inst->alg.import = hmac_import;

	inst->alg.export_core = hmac_export_core;

	inst->alg.import_core = hmac_import_core;

	inst->alg.setkey = hmac_setkey;

	inst->alg.init_tfm = hmac_init_tfm;

	inst->alg.clone_tfm = hmac_clone_tfm;