linux-kernel - Re: [PATCH 4/7] crypto: qce: Add support for AEAD algorithms

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Date:   Tue, 16 Mar 2021 22:09:41 -0400
From:   Thara Gopinath <thara.gopinath@...aro.org>
To:     Herbert Xu <herbert@...dor.apana.org.au>
Cc:     davem@...emloft.net, bjorn.andersson@...aro.org,
        ebiggers@...gle.com, ardb@...nel.org, sivaprak@...eaurora.org,
        linux-crypto@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/7] crypto: qce: Add support for AEAD algorithms



On 3/12/21 8:01 AM, Herbert Xu wrote:
> On Thu, Feb 25, 2021 at 01:27:13PM -0500, Thara Gopinath wrote:
>>
>> +static int
>> +qce_aead_async_req_handle(struct crypto_async_request *async_req)
>> +{
>> +	struct aead_request *req = aead_request_cast(async_req);
>> +	struct qce_aead_reqctx *rctx = aead_request_ctx(req);
>> +	struct crypto_aead *tfm = crypto_aead_reqtfm(req);
>> +	struct qce_aead_ctx *ctx = crypto_tfm_ctx(async_req->tfm);
>> +	struct qce_alg_template *tmpl = to_aead_tmpl(crypto_aead_reqtfm(req));
>> +	struct qce_device *qce = tmpl->qce;
>> +	enum dma_data_direction dir_src, dir_dst;
>> +	unsigned int totallen;
>> +	bool diff_dst;
>> +	int ret;
>> +
>> +	if (IS_CCM_RFC4309(rctx->flags)) {
>> +		memset(rctx->ccm_rfc4309_iv, 0, QCE_MAX_IV_SIZE);
>> +		rctx->ccm_rfc4309_iv[0] = 3;
>> +		memcpy(&rctx->ccm_rfc4309_iv[1], ctx->ccm4309_salt, QCE_CCM4309_SALT_SIZE);
>> +		memcpy(&rctx->ccm_rfc4309_iv[4], req->iv, 8);
>> +		rctx->iv = rctx->ccm_rfc4309_iv;
>> +		rctx->ivsize = AES_BLOCK_SIZE;
>> +	} else {
>> +		rctx->iv = req->iv;
>> +		rctx->ivsize = crypto_aead_ivsize(tfm);
>> +	}
>> +	if (IS_CCM_RFC4309(rctx->flags))
>> +		rctx->assoclen = req->assoclen - 8;
>> +	else
>> +		rctx->assoclen = req->assoclen;
>> +
>> +	totallen = rctx->cryptlen + rctx->assoclen;
> 
> This triggers a warning on totallen not being used.  Please fix.

hmm.. this is strange. I could swear that I checked for warnings before 
sending this out. But I will fix this. I will wait for a couple of more 
days for any other comments and then spin a v2.

> 
> Thanks,
> 

-- 
Warm Regards
Thara