From: Herbert Xu Subject: Re: DRBG seeding Date: Sat, 18 Apr 2015 09:27:44 +0800 Message-ID: <20150418012744.GA1329@gondor.apana.org.au> References: <20150416143617.GA17178@gondor.apana.org.au> <2956307.5uMbChcz7z@myon.chronox.de> <20150417131137.GA27060@gondor.apana.org.au> <2278042.JS7c5BLrbA@myon.chronox.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Andreas Steffen , Linux Crypto Mailing List To: Stephan Mueller Return-path: Received: from helcar.hengli.com.au ([209.40.204.226]:59689 "EHLO helcar.hengli.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751757AbbDRB1x (ORCPT ); Fri, 17 Apr 2015 21:27:53 -0400 Content-Disposition: inline In-Reply-To: <2278042.JS7c5BLrbA@myon.chronox.de> Sender: linux-crypto-owner@vger.kernel.org List-ID: On Fri, Apr 17, 2015 at 03:22:56PM +0200, Stephan Mueller wrote: > > > The only reason someone would use this is to comply with the > > standard and this is what the standard requires so I don't see > > how we can do anything else. > > I do not see a definite quality requirement of the seed source in SP800-90A. Section 8.6.5 "Source of Entropy Input" explicitly requires this. TBH whether /dev/random even satisfies 8.6.5 is also debatable. But it agrees with the specification at least in spirit. Cheers, -- Email: Herbert Xu Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt