Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id 84040D4A for ; Thu, 21 Jan 2016 02:57:33 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.7.6 Received: from omr1.cc.vt.edu (outbound.smtp.vt.edu [198.82.183.121]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 0198811D for ; Thu, 21 Jan 2016 02:57:31 +0000 (UTC) Received: from mr4.cc.vt.edu (mr4.cc.ipv6.vt.edu [IPv6:2001:468:c80:2105:0:232:8670:19fe]) by omr1.cc.vt.edu (8.14.4/8.14.4) with ESMTP id u0L2vUhP024756 for ; Wed, 20 Jan 2016 21:57:30 -0500 Received: from mail-pf0-f178.google.com (mail-pf0-f178.google.com [209.85.192.178]) by mr4.cc.vt.edu (8.14.4/8.14.4) with ESMTP id u0L2vPnZ014080 for ; Wed, 20 Jan 2016 21:57:30 -0500 Received: by mail-pf0-f178.google.com with SMTP id e65so15245322pfe.0 for ; Wed, 20 Jan 2016 18:57:30 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-type :content-transfer-encoding; bh=9v8DWyXm0KmXmKAxHc1h0XxfXjNPP15GW795sCUwD7c=; b=MeFcSFBQiXjGuTnBEMC4ziBjKWofZjdOxdR+neICcJvlmcrCroIzR8tcsa/MJCsh6L LcCyuPi+gTNeIydR1mzXynFlY2H3+TAtJz79ykxtNDr/K6nt6rBV3eUMtR92pBiZD0Ss l17vn8jVuW8qCe45PfJF8QAFw4IXNuZzkmYWeEUwsgfiUYRHqA/rqJxAUC1cHJ+Pqa1K keNMgOJlJ5ohvNWNM5VeAqVCc19ClAvZV+JmPyuJVH6p9q6yslhzkWnlKrnURuEiWvGZ LL3UsVOOrh8uqgZcDxMKxVP4a+Lx2xB/RIpOcGTcJtYUp+sAVRnbKEr7J7GS6hw6/cHU yTpQ== X-Gm-Message-State: ALoCoQlhJhDRFBkxiQwFDhpsDC5iDiuzucghLi/+4H4h3hA5/F5lfzEGzI730MMqjLEQeO7Ruy7d4e+U3kS2yQUg4RQ/cNc3nPgnc6mojB+bw2bKEYX1iwKVXhVtjs8OU9qGZRV+LaiG63ki31xsyEn/mZ4PHvIA9Sb6p6LySk0ZNl9ooOnG863TaLQ5kms5vOI1pW+BV1MYQdGzIjcf36ITS3czBUb3h2YkWLbiF8nz0ikpPuUH47Q= X-Received: by 10.98.75.156 with SMTP id d28mr58320835pfj.108.1453345045077; Wed, 20 Jan 2016 18:57:25 -0800 (PST) X-Received: by 10.98.75.156 with SMTP id d28mr58320825pfj.108.1453345044933; Wed, 20 Jan 2016 18:57:24 -0800 (PST) Received: from [192.168.1.230] (c-24-22-36-12.hsd1.or.comcast.net. [24.22.36.12]) by smtp.googlemail.com with ESMTPSA id n5sm51699703pfi.3.2016.01.20.18.57.24 for (version=TLSv1/SSLv3 cipher=OTHER); Wed, 20 Jan 2016 18:57:24 -0800 (PST) To: bitcoin-dev@lists.linuxfoundation.org References: From: Douglas Roark X-Enigmail-Draft-Status: N1110 Message-ID: <56A04913.90906@vt.edu> Date: Wed, 20 Jan 2016 18:57:23 -0800 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:38.0) Gecko/20100101 Thunderbird/38.5.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW, RP_MATCHES_RCVD autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on smtp1.linux-foundation.org Subject: Re: [bitcoin-dev] What is OpenSSL still used for? X-BeenThere: bitcoin-dev@lists.linuxfoundation.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Bitcoin Development Discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Jan 2016 02:57:33 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 On 2016/1/18 19:58, Ethan Heilman via bitcoin-dev wrote: > I believe libsecp256k1 just performs Elliptic Curve operations > required by Bitcoin. OpenSSL is used for all other crypto. The exact answer, as I understand it, is a bit more nuanced. In particular, you referenced the PRNG. I believe libsecp256k1, as currently written, relies on an implementation of RFC 6979 instead of using a PRNG. I'm guessing this is done for portability reasons (no need to hook into the OS's RNG). Otherwise, yes, I believe this answer is basically correct. There are still some crypto functions not covered by libsecp256k1, at least at the API level. But, for consensus-critical functionality, I think 0.12 will be rid of OpenSSL. - -- - --- Douglas Roark Cryptocurrency, network security, travel, and art. https://onename.com/droark joroark@vt.edu PGP key ID: 26623924 -----BEGIN PGP SIGNATURE----- Comment: GPGTools - https://gpgtools.org iQIcBAEBCgAGBQJWoEkTAAoJEEOBHRomYjkkoR0QAKmvgmoOdCw7SLP9cFURltXw Ro8mOfikjp04C6tsshtiKQ1+jq80wBhioVYIL7XiyNU7ZUNdAWSc/wGBCG+YkMeQ 6h02WJZQtTe0PvGVHIgUw6SiV4ZzXBuapXQX0BgEl0pInvQkRRqWtgrqDlWbqJVg NKzm8Kh+c8JUHEKbhnC45Jgh2JYHpyXcByLHSyGYsPOprjHmsupCPC6qydrRnuaO r7YHtObK2myOglJ1h6BXir//+XNbk6RiRNf5voONNAR9L+69BBV7hMVVO3eiDZ12 vrNaOIKhDjhDs1kmkFYi7ML/zKBQRXlb7iM8AEpfCUKl/zK9bSNeblP4ZBGPqjCm 9TGCqGjmKEbg7AYXjyMvmw+jZReediJMNYpCdxaSJi+XJZO6EC28pcKsb6pu/9gX NCLf1T/f2NoyXxc57aTuHNo0SnVaee1z0+IlGSh+5foxhZGbFmPhxOy3WNIubuou tm0guAXloCCERwVg0OhhQ3YyrlOWz7VnUrT8cteQC+yP353zdnxay7ZmQh9swcyR VX7yu4xLcxgbQmBIhMyKs9iQnycOrdNhZEfGx4vQ2ZKAj1CPVqrgKxbtY3KuPfvb YAzfs/iXaqBHH7FN9juLMRGqkzyVzJ9mIsFyLldADvSoc8RSa1IQiZtfPsIU1w1i UKEl9Qasje80EojNZNz0 =glL2 -----END PGP SIGNATURE-----