linux-kernel - Re: [PATCH] crypto: tcrypt

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Message-ID: <YvsxjuBlOw6g4I/c@gondor.apana.org.au>
Date:   Tue, 16 Aug 2022 13:56:30 +0800
From:   Herbert Xu <herbert@...dor.apana.org.au>
To:     Robert Elliott <elliott@....com>
Cc:     davem@...emloft.net, linux-crypto@...r.kernel.org,
        linux-kernel@...r.kernel.org, ardb@...nel.org, toshi.kani@....com
Subject: Re: [PATCH] crypto: tcrypt - remove mode=1000

On Sun, Aug 14, 2022 at 11:29:15PM -0500, Robert Elliott wrote:
> The lists of algothms checked for existence by
>     modprobe tcrypt mode=1000
> generates three bogus errors:
>     modprobe tcrypt mode=1000
> 
>     console log:
>     tcrypt: alg rot13 not found
>     tcrypt: alg cts not found
>     tcrypt: alg arc4 not found
> 
> rot13 is not an algorithm in the crypto API or tested.
> 
> cts is a wrapper, not a base algorithm.
> 
> arc4 is named ecb(arc4), not arc4.
> 
> Also, the list is missing numerous algorithms that are tested by
> other test modes:
>     blake2b-512
>     blake2s-256
>     crct10dif
>     xxhash64
>     ghash
>     cast5
>     sm4
>     ansi_prng
> 
> Several of the algorithms are only available if
> CONFIG_CRYPTO_USER_API_ENABLE_OBSOLETE is enabled:
>     arc4
>     khazad
>     seed
>     tea, xtea, xeta
> 
> Rather that fix that list, remove test mode=1000 entirely.
> It seems to have limited utility, and a web search shows no
> discussion of anybody using it.
> 
> Suggested-by: Ard Biesheuvel <ardb@...nel.org>
> Signed-off-by: Robert Elliott <elliott@....com>
> ---
>  crypto/tcrypt.c | 28 ----------------------------
>  1 file changed, 28 deletions(-)

I think it would be better to use alg_test_descs as the source
list of get rid of check.  But I never use this so unless someone
else complains I'm fine with removing it.

Thanks,
-- 
Email: Herbert Xu <herbert@...dor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt