From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.saout.de ([127.0.0.1]) by localhost (mail.saout.de [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id wdhOj_oSQofA for ; Fri, 20 Apr 2012 12:22:46 +0200 (CEST) Received: from v4.tansi.org (ns.km33513-03.keymachine.de [87.118.94.3]) by mail.saout.de (Postfix) with ESMTP for ; Fri, 20 Apr 2012 12:22:45 +0200 (CEST) Received: from gatewagner.dyndns.org (84-74-163-71.dclient.hispeed.ch [84.74.163.71]) by v4.tansi.org (Postfix) with ESMTPA id 6F6A42057B4 for ; Fri, 20 Apr 2012 12:22:45 +0200 (CEST) Date: Fri, 20 Apr 2012 12:22:44 +0200 From: Arno Wagner Message-ID: <20120420102244.GA18629@tansi.org> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Subject: Re: [dm-crypt] why nbytes for block cipher encrypt/decrypt is only 512 bytes List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: dm-crypt@saout.de I think you cannot. As long as the block-size for the IV scheme is 512 bytes, you are stuck with encrypting 512 bytes at a time, as they have their own IV. Arno On Fri, Apr 20, 2012 at 05:28:54PM +0800, Rodel Miguel wrote: > Hi, > > I am implementing a hardware encryption driver but I am having some > performance issues. One of the areas of performance improvement that I am > thinking is to increase the number of bytes (unsigned int nbytes) that my > block cipher driver's encrypt/decrypt function gets; from 512 to 4096 > bytes. My hardware can be maximized to 4kbytes. Do you have any > suggestions how I can maximize the en/decrypt performance by getting more > than 512 bytes of data every time the block cipher's encrypt/decrypt is > called? > > Thank you very much for your help! > > Kind Regards, > Rodel > _______________________________________________ > dm-crypt mailing list > dm-crypt@saout.de > http://www.saout.de/mailman/listinfo/dm-crypt -- Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@wagner.name GnuPG: ID: 1E25338F FP: 0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F ---- One of the painful things about our time is that those who feel certainty are stupid, and those with any imagination and understanding are filled with doubt and indecision. -- Bertrand Russell