linux-kernel - Re: [PATCH 5/5] crypto: ahash.c: Require export/import in ahash

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <5db6f843-cc51-09f2-f388-8dade440c6bc@denx.de>
Date:   Thu, 18 Jan 2018 22:31:58 +0100
From:   Marek Vasut <marex@...x.de>
To:     Kamil Konieczny <k.konieczny@...tner.samsung.com>,
        linux-crypto@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Sonic Zhang <sonic.zhang@...log.com>,
        Fabio Estevam <fabio.estevam@...escale.com>,
        Shawn Guo <shawn.guo@...aro.org>,
        Tom Lendacky <thomas.lendacky@....com>,
        Jan Engelhardt <jengelh@...i.de>,
        Arvind Yadav <arvind.yadav.cs@...il.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Joakim Bech <joakim.bech@...aro.org>,
        linux-kernel@...r.kernel.org,
        Herbert Xu <herbert@...dor.apana.org.au>
Subject: Re: [PATCH 5/5] crypto: ahash.c: Require export/import in ahash

On 01/18/2018 07:34 PM, Kamil Konieczny wrote:
> Export and import are mandatory in async hash. As drivers were
> rewritten, drop empty wrappers and correct init of ahash transformation.

Are you moving checks from the core subsystem to drivers ? This looks
really nonsensical and the commit message doesn't explain the rationale
for that at all.

> Signed-off-by: Kamil Konieczny <k.konieczny@...tner.samsung.com>
> ---
>  crypto/ahash.c | 18 ++----------------
>  1 file changed, 2 insertions(+), 16 deletions(-)
> 
> diff --git a/crypto/ahash.c b/crypto/ahash.c
> index 3a35d67de7d9..c3cce508c1d4 100644
> --- a/crypto/ahash.c
> +++ b/crypto/ahash.c
> @@ -434,16 +434,6 @@ static int ahash_def_finup(struct ahash_request *req)
>  	return ahash_def_finup_finish1(req, err);
>  }
>  
> -static int ahash_no_export(struct ahash_request *req, void *out)
> -{
> -	return -ENOSYS;
> -}
> -
> -static int ahash_no_import(struct ahash_request *req, const void *in)
> -{
> -	return -ENOSYS;
> -}
> -
>  static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
>  {
>  	struct crypto_ahash *hash = __crypto_ahash_cast(tfm);
> @@ -451,8 +441,6 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
>  
>  	hash->setkey = ahash_nosetkey;
>  	hash->has_setkey = false;
> -	hash->export = ahash_no_export;
> -	hash->import = ahash_no_import;
>  
>  	if (tfm->__crt_alg->cra_type != &crypto_ahash_type)
>  		return crypto_init_shash_ops_async(tfm);
> @@ -462,15 +450,13 @@ static int crypto_ahash_init_tfm(struct crypto_tfm *tfm)
>  	hash->final = alg->final;
>  	hash->finup = alg->finup ?: ahash_def_finup;
>  	hash->digest = alg->digest;
> +	hash->export = alg->export;
> +	hash->import = alg->import;
>  
>  	if (alg->setkey) {
>  		hash->setkey = alg->setkey;
>  		hash->has_setkey = true;
>  	}
> -	if (alg->export)
> -		hash->export = alg->export;
> -	if (alg->import)
> -		hash->import = alg->import;
>  
>  	return 0;
>  }
> 


-- 
Best regards,
Marek Vasut