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charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.29 Subject: Re: [dpdk-dev] Crypto API for AES-XTS cipher algorithm X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Hi Matan, Block size is specified in the capability structure and is expected to be s= ame for a particular algorithm. And for AES-XTS it is 16 bytes only if I am not wrong. As per my understanding, data unit is different from block size. Data unit is the input data which may or may not be multiple of block size.= There are different handling of data Unit defined if it a multiple of block size or not. And I believe there is = limitation for the max value of data unit Which the driver can give error if it does not support that particular size= . Regards, Akhil From: Matan Azrad Sent: Monday, January 18, 2021 8:19 PM To: Declan Doherty ; Akhil Goyal Cc: dev@dpdk.org Subject: Crypto API for AES-XTS cipher algorithm Hi Declan, Akhil We are going to implement mlx5 crypto PMD to support AES-XTS de\encrypt ope= rations. The algorithm defines block size >=3D 16Bytes (it is called also data-unit)= which should be known for encryption\decryptions. I didn't find this parameter in the cypher xform. How do you suggest to add it? maybe I'm missing something? Matan