linux-kernel - Re: [PATCH v2 1/2] crypto: fix mismatched hash algorithm name sm3-256 to sm3

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Date:   Tue, 18 Feb 2020 10:43:08 +0800
From:   Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
To:     Mimi Zohar <zohar@...ux.ibm.com>, herbert@...dor.apana.org.au,
        davem@...emloft.net, jarkko.sakkinen@...ux.intel.com,
        ebiggers@...nel.org, dmitry.kasatkin@...il.com, jmorris@...ei.org,
        serge@...lyn.com
Cc:     linux-crypto@...r.kernel.org, linux-integrity@...r.kernel.org,
        linux-security-module@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] crypto: fix mismatched hash algorithm name sm3-256
 to sm3



On 2020/2/18 9:33, Mimi Zohar wrote:
> On Mon, 2020-02-17 at 17:36 +0800, Tianjia Zhang wrote:
>> The name sm3-256 is defined in hash_algo_name in hash_info, but the
>> algorithm name implemented in sm3_generic.c is sm3, which will cause
>> the sm3-256 algorithm to be not found in some application scenarios of
>> the hash algorithm, and an ENOENT error will occur. For example,
>> IMA, keys, and other subsystems that reference hash_algo_name all use
>> the hash algorithm of sm3.
>>
>> According to https://tools.ietf.org/id/draft-oscca-cfrg-sm3-01.html,
>> SM3 always produces a 256-bit hash value and there are no plans for
>> other length development, so there is no ambiguity in the name of sm3.
>>
>> Signed-off-by: Tianjia Zhang <tianjia.zhang@...ux.alibaba.com>
>> Cc: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
> 
> The previous version of this patch set is queued in the next-
> integrity-testing branch.  That version of this patch didn't
> change TPM_ALG_SM3_256.  Unless the TPM standard was modified, the TPM
> spec refers to it as TPM_ALG_SM3_256.  Has that changed?
> 
> Mimi
> 

The definition in the TPM specification is still TPM_ALG_SM3_256, please
ignore the modification to the TPM definition in this patch.

Thanks,
Tianjia