[Soekris] VPN 1401 entropy output
Hello all, Hello, I'm interested in the VPN 1401, primarily for use as a HRNG with perhaps some light crypto acceleration. However, after reading through multiple white papers, I've been unable to determine the rate of entropy provided by the Hifn 7955. Does anyone have any real-world numbers to show how much entropy is generated by this device? Not a mailing list subscriber, so please reply directly. ;) All the best, -Chris ___ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
Re: [Soekris] VPN 1401 entropy output
Le Thu, 07 Feb 2013 15:29:28 -0800, Chris Wadge cwa...@gmail.com a écrit : Hello all, Hello, I'm interested in the VPN 1401, primarily for use as a HRNG with perhaps some light crypto acceleration. However, after reading through multiple white papers, I've been unable to determine the rate of entropy provided by the Hifn 7955. Does anyone have any real-world numbers to show how much entropy is generated by this device? Not a mailing list subscriber, so please reply directly. ;) I don't know the rate of the chipset but this depends how the driver collects entropy from the device. On FreeBSD (and I guess OpenBSD), it collects 16 bits of random bits each hz/100 ticks. A tick is 1/hz seconds. So with the default value of hz = 1000 on FreeBSD, the rate is 32 bits each 10 milliseconds. Regards. ___ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
Re: [Soekris] Clock losing time on Net5501
On 2013-02-13, Christian Weisgerber na...@mips.inka.de wrote: Joakim Aronius joa...@aronius.se wrote: [OpenBSD] I have not had time to look into the 'new' rc.d controlsystem for starting and stopping services but a cronjob with '/etc/rc.d/ntpd restart' should do the same thing as a reboot.. But I could not find anything on special handling like writing hw clock during shutdown, could be internal in ntpd. ntpd(8) doesn't have anything to do with it. The hardware clock is set by the boot(9) call when halting/rebooting the system. settimeofday(2) and clock_settime(2) will also set the hardware clock. However, only ntpd -s calls settimeofday, once at startup. In normal operation, ntpd uses adjtime(2), which does not touch the hardware clock. So, in theory, this should force it to be written: # date $(date +%Y%m%d%H%M.%S) ___ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
Re: [Soekris] Clock losing time on Net5501
Stuart Henderson s...@spacehopper.org writes: So, in theory, this should force it to be written: # date $(date +%Y%m%d%H%M.%S) Yes, but that will set fractional seconds to zero. You probably want a C program that does gettimeofday()/settimeofday() pgp5eB7CUHWfC.pgp Description: PGP signature ___ Soekris-tech mailing list Soekris-tech@lists.soekris.com http://lists.soekris.com/mailman/listinfo/soekris-tech
