[issue27279] Add random.cryptorandom() and random.pseudorandom, deprecate os.urandom()
Marc-Andre Lemburg
report at bugs.python.org
Thu Jun 9 06:38:26 EDT 2016
Marc-Andre Lemburg added the comment:
Resources for entropy gathering sources:
* Kernel based devices such as /dev/random:
https://en.wikipedia.org/wiki//dev/random
* EGD - old entropy gathering daemon; blocks when out of
entropy
http://egd.sourceforge.net/
(not maintained anymore)
Important here is not the original implementation, but
the Unix domain socket interface, which many applications
support.
* PRNG - provides the EGD interface, but feeds entropy into
the OpenSSL pool; essentially a CPRNG with EGD interface.
http://prngd.sourceforge.net/
* Virtio RNG - paravirtualized device for passing host RNG
to guest VMs (running under KVM)
https://fedoraproject.org/wiki/Features/Virtio_RNG
* haveged - entropy daemon which feeds entropy into the
Linux /dev/random pool
http://www.issihosts.com/haveged/
https://wiki.archlinux.org/index.php/Haveged
Whether this is useful on VMs, is contested, due to the way
haveged works (reliance on rdtsc instructions which don't work
well in VMs)
http://security.stackexchange.com/questions/34523/is-it-appropriate-to-use-haveged-as-a-source-of-entropy-on-virtual-machines
* Hardware RNG in Raspberry Pi:
https://sites.google.com/site/astudyofentropy/project-definition/raspberry-pi-internal-hardware-random-number-generator
* rng-tools - provides the rngd daemon to feed entropy from
hardware RNGs into the Linux /dev/random pool
https://wiki.archlinux.org/index.php/Rng-tools
http://linux.die.net/man/8/rngd
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