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From: "David Jaša" <djasa@redhat.com>
To: Stephan Mueller <smueller@chronox.de>
Cc: Andi Kleen <andi@firstfloor.org>,
	sandyinchina@gmail.com,
	Jason Cooper <cryptography@lakedaemon.net>,
	John Denker <jsd@av8n.com>,
	"H. Peter Anvin" <hpa@linux.intel.com>,
	Joe Perches <joe@perches.com>, Pavel Machek <pavel@ucw.cz>,
	George Spelvin <linux@horizon.com>,
	linux-crypto@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v4 0/5] /dev/random - a new approach
Date: Wed, 15 Jun 2016 18:17:43 +0200	[thread overview]
Message-ID: <1466007463.20087.11.camel@redhat.com> (raw)
In-Reply-To: <1668650.acZVSyjHlL@positron.chronox.de>

Hello Stephan,

Did you consider blocking urandom output or returning error until
initialized? Given the speed of initialization you report, it shouldn't
break any userspace apps while making sure that nobody uses predictable
pseudoranom numbers.

I was considering asking for patch (or even trying to write it myself)
to make current urandom block/fail when not initialized but that would
surely have to be off by default over "never break userspace" rule (even
if it means way too easy security problem with both random and urandom).
Properties of your urandom implementation makes this point moot and it
could make the random/urandom wars over.

Best Regards,

David Jaša

  parent reply	other threads:[~2016-06-15 16:17 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-05-31 18:37 [PATCH v4 0/5] /dev/random - a new approach Stephan Mueller
2016-05-31 18:37 ` [PATCH v4 1/5] crypto: DRBG - externalize DRBG functions for LRNG Stephan Mueller
2016-05-31 18:38 ` [PATCH v4 2/5] random: conditionally compile code depending on LRNG Stephan Mueller
2016-05-31 18:39 ` [PATCH v4 3/5] crypto: Linux Random Number Generator Stephan Mueller
2016-05-31 18:39 ` [PATCH v4 4/5] crypto: LRNG - enable compile Stephan Mueller
2016-05-31 18:39 ` [PATCH v4 5/5] random: add interrupt callback to VMBus IRQ handler Stephan Mueller
2016-05-31 22:34 ` [PATCH v4 0/5] /dev/random - a new approach George Spelvin
2016-06-15 16:17 ` David Jaša [this message]
2016-06-15 16:58   ` Stephan Mueller
2016-06-17 13:56     ` David Jaša
2016-06-17 15:26       ` Sandy Harris
2016-06-18  8:22         ` Stephan Mueller
2016-06-18  8:21       ` Stephan Mueller
2016-06-18 14:44       ` Theodore Ts'o
2016-06-18 16:31         ` Stephan Mueller
2016-06-20 17:07           ` Austin S. Hemmelgarn
2016-06-20 18:32             ` Stephan Mueller
2016-06-21 13:05               ` Austin S. Hemmelgarn
2016-06-21 13:19                 ` Tomas Mraz
2016-06-21 17:18                   ` Austin S. Hemmelgarn
2016-06-21 17:23                     ` Stephan Mueller
2016-06-21 17:54                       ` Austin S. Hemmelgarn
2016-06-21 18:05                         ` Stephan Mueller
2016-06-21 13:20                 ` Stephan Mueller
2016-06-21 17:51                   ` Austin S. Hemmelgarn
2016-06-21 18:04                     ` Stephan Mueller
2016-06-21 19:31                       ` Austin S. Hemmelgarn
2016-06-22  5:16                         ` Stephan Mueller
2016-06-22 12:54                           ` Austin S. Hemmelgarn
2016-06-22 13:25                             ` Stephan Mueller
2016-06-21 13:42                 ` Pavel Machek
2016-06-21 17:17                   ` Austin S. Hemmelgarn
2016-06-21 12:25         ` David Jaša

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