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Commit a5596d63 authored by Herbert Xu's avatar Herbert Xu
Browse files

crypto: hash - Add crypto_ahash_has_setkey 



This patch adds a way for ahash users to determine whether a key
is required by a crypto_ahash transform.

Cc: stable@vger.kernel.org
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent a0fa2d03

crypto/ahash.c

+4 −1
Original line number Diff line number Diff line
@@ -451,6 +451,7 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm) 
	struct ahash_alg *alg = crypto_ahash_alg(hash);



	hash->setkey = ahash_nosetkey;

	hash->has_setkey = false;

	hash->export = ahash_no_export;

	hash->import = ahash_no_import;
@@ -463,8 +464,10 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm) 
	hash->finup = alg->finup ?: ahash_def_finup;

	hash->digest = alg->digest;



	if (alg->setkey)

	if (alg->setkey) {

		hash->setkey = alg->setkey;

		hash->has_setkey = true;

	}

	if (alg->export)

		hash->export = alg->export;

	if (alg->import)

crypto/shash.c

+3 −1
Original line number Diff line number Diff line
@@ -355,8 +355,10 @@ int crypto_init_shash_ops_async(struct crypto_tfm *tfm) 
	crt->finup = shash_async_finup;

	crt->digest = shash_async_digest;



	if (alg->setkey)

	if (alg->setkey) {

		crt->setkey = shash_async_setkey;

		crt->has_setkey = true;

	}

	if (alg->export)

		crt->export = shash_async_export;

	if (alg->import)

include/crypto/hash.h

+6 −0
Original line number Diff line number Diff line
@@ -204,6 +204,7 @@ struct crypto_ahash { 
		      unsigned int keylen);



	unsigned int reqsize;

	bool has_setkey;

	struct crypto_tfm base;

};
@@ -375,6 +376,11 @@ static inline void *ahash_request_ctx(struct ahash_request *req) 
int crypto_ahash_setkey(struct crypto_ahash *tfm, const u8 *key,

			unsigned int keylen);



static inline bool crypto_ahash_has_setkey(struct crypto_ahash *tfm)

{

	return tfm->has_setkey;

}



/**

 * crypto_ahash_finup() - update and finalize message digest

 * @req: reference to the ahash_request handle that holds all information