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CVS log for src/lib/libc/crypt/Attic/arc4random.c

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Keyword substitution: kv
Default branch: MAIN

new implementation of arc4random(3) API (except arc4random_uniform(3),
which though has been split off earlier today)

deprecate arc4random_push arc4random_pushb arc4random_pushk
in favour of arc4random_pushb_fast as well

hide internal symbols from user with a version script (only some,
until the next major bump)

make deprecated functions into macros already

switch some kernel code to use the new shared code already; rewrite
of kernel arc4random(9) will come next/later

• kern/c/arc4random_uniform.c, kern/include/libckern.h: move
  arc4random_uniform(3) implementation here
• kern/c/Makefile.inc: build arc4random_uniform.c kernel/user
• lib/libc/crypt/arc4random.c, sys/dev/rnd.c: remove implementation here
• sys/dev/rndvar.h: prototype is now in <libckern.h>
• contrib/code/Snippets/arc4random.c: sync with master implementation

add (if 0’d) arc4random_add_lazy – will be added when we really need/use
it, maybe with a push_lazy variant as well – and a small bugfix

With the test programme below, I also have double-checked the
arc4random_uniform interna. Thus, sync it across all the dif-
ferent implemementations for better comprehension.

begin 644 test.c.gz
M'XL(```````"`UV036O#,`R&S_:O>-=1L)MN)$X(A7X<=^JUL,-@C"6EAM0=
M:=(:UNRW3[83ME076=*C5[(>M?FLVJ+$ZMP4^O1\V'"N3<./']J(RTD7DG]S
MUE(JS]X;V#GJ/%N&3*I<)E642]6QK;Q?<LXLUH@)NAYT54)$D<4*L4WBWG;;
MK03),M)RZ*B"*2SU,A*FFG_J/80+-X0N!C(HL#":R-KS"2+\6+<&8QW*ZES>
M84+$]J6W'9Z"\`Q04E)K(MWXT,Z"XC^><$>/L:Y?T/WE(:QQN^$OHK'2J7W5
M=+*]F-CU-%Z\(L^"3]5,#2_OW\QD[J_JFD`FAEM+$AW=6M)\&E^735L;6I3B
+CO\"?M$\_-(!````
`
end

fix a coding error in the KSA found by myself reading several descriptions of aRC4

make things const that should be const where we can,
complain about things where we cannot change the API
designed by const-dirty OpenBSDdiots

again, improved entropy pass behaviour in arc4random_pushb (and pushk,
which has been the same for quite a while)

feature- and style-sync Snippets/arc4random.c and libc’s with each other

reword arc4random_pushb(3) – cleaner, leaner, hashier

throw away before, not after (more PFS)

throw away single arc4_getbyte()s at random on request, as we do in kernel

• remove a dead line of code
• ensure some more fuzz in initial keystream throwaway

merge and wrap exec/exit functions better

import OpenBSD-current

use user-space programmes as a sort of fifth entropy pool by pushing
entropy to kernel atexit(3) - imperfect (could do better by using the
entire state information plus time and pid, calculate space better, etc.)
and pending an arc4random.c total rewrite, but for that I'd like to add
the new APIs from obsd-current (_bytes and _uniform) first and read the
books mentioned, so we do this "el cheapo" for now => increases amount
of entropy in overall system circulation and modelling difficulty raises

discarding the initial key stream wants us to get rid of
256 “long words” of 32 bit, not of 256 bytes… (plus that
fuzzy factor of ours I added)

spotted while improving contrib/code/Snippets/arc4random.c

add a little uncertainty to the arc4random_pushb(3) functionality

even better and fix a bug when passing >256 args *sigh*
*gets a coffee*

I knew it… a revision 1.13 is bad luck

make arc4random_pushb internally a little more KISS like arc4random_pushk;
also allows more than 256 bytes of argument (they get folded then)

while time isn’t a secret, it certainly helps sometimes; I’d add truerand() to the mix but it’s too hard from within libc

solve alignment issues (on sparc and with __CRAZY=Yes) by use of a union

• take pid and time more/better into account when stirring or a4_pushb, and
  throw away less information supplied by the user on the latter
• __CRAZY=Yes clean

taitime.h missing include

oops, rand() not random() where we deliberately use
non-strong data from other sources; shrinks this some

the implementation was good, the specification lacked a const...

implement new arc4random_pushb(3) API

_do_ stir with the current time as well

__CRAZY cleanliness for most of libc
not: net/rpc/etc., time, thread, sys

merge

Import almost everything (no ancontrol, ifconfig, pfctl, wicontrol)
of (the undeleted parts of) OpenBSD-current's userland of about 3 hours ago.
Warning: this introduces major breakage!

merge src/lib

Import the OpenBSD foundation of MirOS BSD

Initial revision