Subject: Re: [PATCH v2 06/18] crypto: dh - introduce RFC 3526 safe-prime
 groups
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>
 <20211209090358.28231-7-nstange@suse.de>
From:   Hannes Reinecke <hare@suse.de>
Message-ID: <8954c4c9-6fa6-aed9-f0be-4873118efb16@suse.de>
Date:   Fri, 10 Dec 2021 12:35:08 +0100
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On 12/9/21 10:03 AM, Nicolai Stange wrote:
> A future patch will make the DH implementation to reject domain parameters
> not corresponding to any of the safe-prime groups approved by SP800-56Arev3
> in FIPS mode.
> 
> The MODP groups specified by RFC 3526 are among those approved safe-prime
> groups. Make them known to the kernel in order to enable the DH
> implementation to recognize those when passed in from e.g. the
> keyctl(KEYCTL_DH_COMPUTE) syscall.
> 
> More specifically, introduce corresponding members to enum dh_group_id
> as well as entries with the resp. domain parameters to the
> safe_prime_groups[] array queried by crypto_dh_decode_key(). The resp.
> ->max_strength value is set to the maximum supported security strength as
> specified in SP800-56Arev3.
> 
> As the domain parameters consume an substantial amount of space, make
> RFC 3526 safe-prime group support selectable by means of the new
> CRYPTO_DH_GROUPS_RFC3526 Kconfig option.
> 
> Signed-off-by: Nicolai Stange <nstange@suse.de>
> ---
>  crypto/Kconfig      |   6 ++
>  crypto/dh_helper.c  | 216 ++++++++++++++++++++++++++++++++++++++++++++
>  include/crypto/dh.h |   7 ++
>  3 files changed, 229 insertions(+)
> 
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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