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SubjectRe: [PATCH v2 06/18] crypto: dh - introduce RFC 3526 safe-prime groups
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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
HRB 36809 (AG Nürnberg), GF: Felix Imendörffer

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