Re: OS-independent entropy source?

2012-01-16 Thread Andy Polyakov
Comments on http://www.openssl.org/~appro/OPENSSL_instrument_bus/ are welcomed. But here, I think you're measuring the difference between two clocks that are derived from the same oscillator. That is worrisome. It seems possible an adversary could analyze the device and describe the

Re: OS-independent entropy source?

2012-01-16 Thread Andy Polyakov
Comments on http://www.openssl.org/~appro/OPENSSL_instrument_bus/ are welcomed. I did not analyse the architecture of tested processors to check how many frequencies they are using and how they are generating them, but isn't this just manifestation of the PLL characteristics? Are you aware

[openssl.org #2686] Manpage for verify(lssl) does not contain key -CRLfile

2012-01-16 Thread Konstantin M. Khankin via RT
I was trying to check certificate against CRL file. CRL is valid, link to CRL Distribution Point is present in cert file and valid too. So I've issued next command: openssl verify -CAfile CA/cacert.pem -crl_check CA/newcerts/03.pem and got: CA/newcerts/03.pem: error 3 at 0 depth lookup:unable

Re: OS-independent entropy source?

2012-01-16 Thread Stanislav Meduna
On 16.01.2012 10:30, Andy Polyakov wrote: Are you aware of any quantitative PLL characteristics that can be relevant in the context? Can *you* argue in favor of the hypothesis? It's essential that somebody else but me argues to confirm or dismiss it. Unfortunately I lack the math needed to do

Re: [PATCH: CVE-2011-1473]: Fight against DoS in openssl

2012-01-16 Thread Tomas Hoger
On Wed, 11 Jan 2012 21:04:33 -0700 Guan Jun He wrote: It seems you're trying to address more than just CVE-2011-1473 via this patch, which results in a fairly large patch. Why do you need to track client IP at all? This issue is about client's ability to do unlimited number of

Re: OS-independent entropy source?

2012-01-16 Thread Peter Waltenberg
We've been using this general design on multi-user CPU's for a few years. I'm happier with it there because even if the entropy source is just a hardware PRNG there's enough other noise (bus stalls from other running processes, interrupts etc) to ensure that it's going to be very very difficult