src/sys/dev/randomdev/yarrow.h, branch mainFreeBSD source treehttps://cgit-dev.freebsd.org/src/atom?h=main2000-10-14T10:59:56ZAfter some complaints about the dir names, the random device is2000-10-14T10:59:56ZMark Murraymarkm@FreeBSD.org2000-10-14T10:59:56Zurn:sha1:a6278a2a42fc77094f356a290336a0fc395feb05
now in dirs called sys/*/random/ instead of sys/*/randomdev/*.
Introduce blocking, but only at startup; the random device will
block until the first reseed happens to prevent clients from
using untrustworthy output.
Provide a read_random() call for the rest of the kernel so that
the entropy device does not need to be present. This means that
things like IPX no longer need to have "device random" hardcoded
into thir kernel config. The downside is that read_random() will
provide very poor output until the entropy device is loaded and
reseeded. It is recommended that developers do NOT use the
read_random() call; instead, they should use arc4random() which
internally uses read_random().
Clean up the mutex and locking code a bit; this makes it possible
to unload the module again.
Move the prototypes for random_set_wakeup* from yarrow.c to yarrow.h so that2000-09-11T19:31:28ZJohn Baldwinjhb@FreeBSD.org2000-09-11T19:31:28Zurn:sha1:ecbcd538a4a545a38e211cd1a1a48d70c7aa3c7a
both yarrow.c and harvest.c can use them.
Approved by: markm
Large upgrade to the entropy device; mainly inspired by feedback2000-09-10T13:52:19ZMark Murraymarkm@FreeBSD.org2000-09-10T13:52:19Zurn:sha1:4d87a031c0106945da094f3ea770ea9b4b5fcd6b
from many folk.
o The reseed process is now a kthread. With SMPng, kthreads are
pre-emptive, so the annoying jerkiness of the mouse is gone.
o The data structures are protected by mutexes now, not splfoo()/splx().
o The cryptographic routines are broken out into their own subroutines.
this facilitates review, and possible replacement if that is ever
found necessary.
Thanks to: kris, green, peter, jasone, grog, jhb
Forgotten to thank: You know who you are; no offense intended.
o Fix a horrible bug where small reads (< 8 bytes) would return the2000-07-25T21:18:47ZMark Murraymarkm@FreeBSD.org2000-07-25T21:18:47Zurn:sha1:7aa4389a6c7429f679ba5d0348c4251242ed4702
wrong bytes.
o Improve the public interface; use void* instead of char* or u_int64_t
to pass arbitrary data around.
Submitted by: kris ("horrible bug")
Clean this up with some BDE-inspired fixes.2000-07-23T11:08:16ZMark Murraymarkm@FreeBSD.org2000-07-23T11:08:16Zurn:sha1:c90a8fc9a54a4321c70fbea7fdef43721f0a6429
o Make the comments KNF-compliant.
o Use nanotime instead of getnanotime; the manpage lies about the
kern.timecounter.method - it has been removed.
o Fix the ENTROPYSOURCE const permanently.
o Make variable names more consistent.
o Make function prototypes more consistent.
Some more needs to be done; to follow.
Yarrow tweaks; separate the fast and slow reseed tasks so that they don't2000-07-09T11:52:12ZMark Murraymarkm@FreeBSD.org2000-07-09T11:52:12Zurn:sha1:585ebe2b4194d4f1de2f35128cd698465d7bfb16
stomp on each other; provide constant names (as enums) for the harvester
to use (makes it more self-documenting).
Add entropy gathering code. This will work whether the module is2000-07-07T09:03:59ZMark Murraymarkm@FreeBSD.org2000-07-07T09:03:59Zurn:sha1:c9ec235ca1e53105c29450d483686482a26751e0
compiled in or loaded.
New machine-independant /dev/random driver.2000-06-25T08:38:58ZMark Murraymarkm@FreeBSD.org2000-06-25T08:38:58Zurn:sha1:4db9ae91ff0ef9de89fcba8928c9d81739a654f0
This is work-in-progress, and the entropy-gathering routines are not
yet present. As such, this should be viewed as a pretty reasonable
PRNG with _ABSOLUTELY_NO_ security!!
Entropy gathering will be the subject of ongoing work.
This is written as a module, and as such is unloadable, but there is
no refcounting done. I would like to use something like device_busy(9)
to achieve this (eventually).
Lots of useful ideas from: bde, phk, Jeroen van Gelderen
Reviewed by: dfr