Newsgroups: php.internals Path: news.php.net Xref: news.php.net php.internals:97861 Return-Path: Mailing-List: contact internals-help@lists.php.net; run by ezmlm Delivered-To: mailing list internals@lists.php.net Received: (qmail 33099 invoked from network); 18 Jan 2017 17:27:38 -0000 Received: from unknown (HELO lists.php.net) (127.0.0.1) by localhost with SMTP; 18 Jan 2017 17:27:38 -0000 Authentication-Results: pb1.pair.com header.from=leight@gmail.com; sender-id=pass Authentication-Results: pb1.pair.com smtp.mail=leight@gmail.com; spf=pass; sender-id=pass Received-SPF: pass (pb1.pair.com: domain gmail.com designates 209.85.215.68 as permitted sender) X-PHP-List-Original-Sender: leight@gmail.com X-Host-Fingerprint: 209.85.215.68 mail-lf0-f68.google.com Received: from [209.85.215.68] ([209.85.215.68:32902] helo=mail-lf0-f68.google.com) by pb1.pair.com (ecelerity 2.1.1.9-wez r(12769M)) with ESMTP id A5/E9-00729-885AF785 for ; Wed, 18 Jan 2017 12:27:38 -0500 Received: by mail-lf0-f68.google.com with SMTP id x1so2704721lff.0 for ; Wed, 18 Jan 2017 09:27:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=BkMDF3+GjLv8fI7LVi7toNX/VJ58EvqhIm62CpBWoV0=; b=Zv+GBVYpxa6xqljmr1e8bp57um+j/T29d+q0yc+vVQAoAtEVodpS39i3cSTHavpdrR xHqUGd30XYvnGZDyIKjDHaKZ3DoxVfgStPHy9vQ0t/yYeLGPdAa1ImtGTrvNMzs/C3Tj DQTdI7sImlCWUUvvNdzaPYqzv52o339cGZgFokiDMO7rlICXYQ2Zfj6xygpqlu/QNHAU sHZMA7G/w6VJ0s1UqZVSs07aG7FrpDQSRXlK0T0ZAqXyL/YzNTGuJ6TN6BuNx9rGh1oU rNPCt7g6BgCb8UlTIse9rmUL7YcpimZeuy+STzMN4/74fUw0D2nGNH27or4gH1YaX9pG TGSg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=BkMDF3+GjLv8fI7LVi7toNX/VJ58EvqhIm62CpBWoV0=; b=TeCoV7uiZ8stWeefdqQoBtR7KxU+/sBGICdgMfMeMe4m6FFSkDEowKngXkMOSdDiT5 WU5tl87TMlpPp/fiJ2/xpCQB5cJS9ui1J9oWk/RgKK46BXrioH0rdqM0M1fqBaZcb6aY JzckCM2UYpyfaNwK/JWx8DXDzX4iGwMGD1EkD8QUhaD7StqpwjOkb0oFcQvlT3JOMI/5 LRsgQmpwjuTWc7L0/W/eLpjPFdd2O9IbUlAd5P8Qe0urQCFmzkBHZ6gb+fnowjJO8MMC RTtmqMVRQ1T0KLfDqhMdFlUmtRdXft1/H822MHMOOJgJE45qpbFBQHapvZVwH9c72e+Q OqRw== X-Gm-Message-State: AIkVDXIZQ3Dy+hOa0l4hPbajjJ7gvLIRSgn2Wv2yx7KM2Vh9h0wRYZzAgV/RVHwCCggvyWV1KcbDAZAKiWTu9w== X-Received: by 10.25.43.8 with SMTP id r8mr1542532lfr.26.1484760454101; Wed, 18 Jan 2017 09:27:34 -0800 (PST) MIME-Version: 1.0 Received: by 10.25.193.83 with HTTP; Wed, 18 Jan 2017 09:27:33 -0800 (PST) In-Reply-To: <8cfe7a3ea5a05fc3e5347e9af848ada0@gmail.com> References: <71c26cd6df6f59e76dafd31647852c2e@koti.fimnet.fi> <142a3537a99809cf23d78e0eaadc3aef@gmail.com> <7a359bb08b0ad8b046534c15492cec91@gmail.com> <8cfe7a3ea5a05fc3e5347e9af848ada0@gmail.com> Date: Wed, 18 Jan 2017 17:27:33 +0000 Message-ID: To: =?UTF-8?Q?Lauri_Kentt=C3=A4?= Cc: Yasuo Ohgaki , Nikita Popov , internals@lists.php.net Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: Re: [PHP-DEV] Re: Improving mt_rand() seed From: leight@gmail.com (Leigh) On 18 January 2017 at 16:06, Lauri Kentt=C3=A4 wro= te: > > If it's not acceptable to randomize the whole state, I'd recommend using > php_random_int_silent() to generate a single seed. This would be easy to > implement by simply changing GENERATE_SEED() into a function which first > tries php_random_int_silent() but has the current method as a fallback. T= his > would fix other use cases of GENERATE_SEED() as well. You don't need to use the random_int functions, 4 bytes from php_random_bytes_silent cast into a uint32_t will give you an unbiased seed. (powers of 2 are unbiased)