Subject: Re: [PATCH v2 08/18] crypto: testmgr - run only subset of DH vectors
 based on config
To:     Nicolai Stange <nstange@suse.de>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        "David S. Miller" <davem@davemloft.net>
Cc:     =?UTF-8?Q?Stephan_M=c3=bcller?= <smueller@chronox.de>,
        Torsten Duwe <duwe@suse.de>, Zaibo Xu <xuzaibo@huawei.com>,
        Giovanni Cabiddu <giovanni.cabiddu@intel.com>,
        David Howells <dhowells@redhat.com>,
        Jarkko Sakkinen <jarkko@kernel.org>,
        linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org,
        qat-linux@intel.com, keyrings@vger.kernel.org
References: <20211209090358.28231-1-nstange@suse.de>
 <20211209090358.28231-9-nstange@suse.de>
From:   Hannes Reinecke <hare@suse.de>
Message-ID: <e08d4112-e001-5cc1-ebaf-74e299af68e3@suse.de>
Date:   Fri, 10 Dec 2021 12:36:19 +0100
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On 12/9/21 10:03 AM, Nicolai Stange wrote:
> With the previous patches, the testmgr now has up to four test vectors for
> DH which all test more or less the same thing:
> - the two vectors from before this series,
> - the vector for the ffdhe3072 group, enabled if
>   CONFIG_CRYPTO_DH_GROUPS_RFC7919 is set and
> - the vector for the modp2048 group, similarly enabled if
>   CONFIG_CRYPTO_DH_GROUPS_RFC3526 is set.
> 
> In order to avoid too much redundancy during DH testing, enable only a
> subset of these depending on the kernel config:
> - if CONFIG_CRYPTO_DH_GROUPS_RFC7919 is set, enable only the ffdhe3072
>   vector,
> - otherwise, if CONFIG_CRYPTO_DH_GROUPS_RFC3526 is set, enable only
>   the modp2048 vector and
> - only enable the original two vectors if neither of these options
>   has been selected.
> 
> Note that an upcoming patch will make the DH implementation to reject any
> domain parameters not corresponding to some safe-prime group approved by
> SP800-56Arev3 in FIPS mode. Thus, having CONFIG_FIPS enabled, but
> both of CONFIG_CRYPTO_DH_GROUPS_RFC7919 and
> CONFIG_CRYPTO_DH_GROUPS_RFC3526 unset wouldn't make much sense as it would
> render the DH implementation unusable in FIPS mode. Conversely, any
> reasonable configuration would ensure that the original, non-conforming
> test vectors would not get to run in FIPS mode.
> 
> Signed-off-by: Nicolai Stange <nstange@suse.de>
> ---
>  crypto/testmgr.h | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
Reviewed-by: Hannes Reinecke <hare@suse.de>

Cheers,

Hannes
-- 
Dr. Hannes Reinecke		           Kernel Storage Architect
hare@suse.de			                  +49 911 74053 688
SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nürnberg
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