packages: sort network related packages into package/network/

[openwrt/openwrt.git] / package / ead / src / tinysrp / t_truerand.c

diff --git a/package/ead/src/tinysrp/t_truerand.c b/package/ead/src/tinysrp/t_truerand.c
deleted file mode 100644 (file)
index fa0d6ce..0000000
--- a/package/ead/src/tinysrp/t_truerand.c
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- *      Physically random numbers (very nearly uniform)
- *      D. P. Mitchell
- *      Modified by Matt Blaze 7/95
- */
-/*
- * The authors of this software are Don Mitchell and Matt Blaze.
- *              Copyright (c) 1995 by AT&T.
- * Permission to use, copy, and modify this software without fee
- * is hereby granted, provided that this entire notice is included in
- * all copies of any software which is or includes a copy or
- * modification of this software and in all copies of the supporting
- * documentation for such software.
- *
- * This software may be subject to United States export controls.
- *
- * THIS SOFTWARE IS BEING PROVIDED "AS IS", WITHOUT ANY EXPRESS OR IMPLIED
- * WARRANTY.  IN PARTICULAR, NEITHER THE AUTHORS NOR AT&T MAKE ANY
- * REPRESENTATION OR WARRANTY OF ANY KIND CONCERNING THE MERCHANTABILITY
- * OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR PURPOSE.
- */
-
-/*
- * WARNING: depending on the particular platform, raw_truerand()
- * output may be biased or correlated.  In general, you can expect
- * about 16 bits of "pseudo-entropy" out of each 32 bit word returned
- * by truerand(), but it may not be uniformly diffused.  You should
- * raw_therefore run the output through some post-whitening function
- * (like MD5 or DES or whatever) before using it to generate key
- * material.  (RSAREF's random package does this for you when you feed
- * raw_truerand() bits to the seed input function.)
- *
- * The application interface, for 8, 16, and 32 bit properly "whitened"
- * random numbers, can be found in trand8(), trand16(), and trand32().
- * Use those instead of calling raw_truerand() directly.
- *
- * The basic idea here is that between clock "skew" and various
- * hard-to-predict OS event arrivals, counting a tight loop will yield
- * a little (maybe a third of a bit or so) of "good" randomness per
- * interval clock tick.  This seems to work well even on unloaded
- * machines.  If there is a human operator at the machine, you should
- * augment truerand with other measure, like keyboard event timing.
- * On server machines (e.g., when you need to generate a
- * Diffie-Hellman secret) truerand alone may be good enough.
- *
- * Test these assumptions on your own platform before fielding a
- * system based on this software or these techniques.
- *
- * This software seems to work well (at 10 or so bits per
- * raw_truerand() call) on a Sun Sparc-20 under SunOS 4.1.3 and on a
- * P100 under BSDI 2.0.  You're on your own elsewhere.
- *
- */
-
-#include "t_defines.h"
-
-#include <signal.h>
-#include <setjmp.h>
-#include <sys/time.h>
-#include <math.h>
-#include <stdio.h>
-
-#ifdef OLD_TRUERAND
-static jmp_buf env;
-#endif
-static unsigned volatile count
-#ifndef OLD_TRUERAND
-  , done = 0
-#endif
-;
-
-static unsigned ocount;
-static unsigned buffer;
-
-static void
-tick()
-{
-       struct itimerval it, oit;
-
-       it.it_interval.tv_sec = 0;
-       it.it_interval.tv_usec = 0;
-       it.it_value.tv_sec = 0;
-       it.it_value.tv_usec = 16665;
-       if (setitimer(ITIMER_REAL, &it, &oit) < 0)
-               perror("tick");
-}
-
-static void
-interrupt()
-{
-       if (count) {
-#ifdef OLD_TRUERAND
-               longjmp(env, 1);
-#else
-               ++done;
-               return;
-#endif
-       }
-
-       (void) signal(SIGALRM, interrupt);
-       tick();
-}
-
-static unsigned long
-roulette()
-{
-#ifdef OLD_TRUERAND
-       if (setjmp(env)) {
-               count ^= (count>>3) ^ (count>>6) ^ ocount;
-               count &= 0x7;
-               ocount=count;
-               buffer = (buffer<<3) ^ count;
-               return buffer;
-       }
-#else
-       done = 0;
-#endif
-       (void) signal(SIGALRM, interrupt);
-       count = 0;
-       tick();
-#ifdef OLD_TRUERAND
-       for (;;)
-#else
-       while(done == 0)
-#endif
-               count++;        /* about 1 MHz on VAX 11/780 */
-#ifndef OLD_TRUERAND
-       count ^= (count>>3) ^ (count>>6) ^ ocount;
-       count &= 0x7;
-       ocount=count;
-       buffer = (buffer<<3) ^ count;
-       return buffer;
-#endif
-}
-
-unsigned long
-raw_truerand()
-{
-       count=0;
-       (void) roulette();
-       (void) roulette();
-       (void) roulette();
-       (void) roulette();
-       (void) roulette();
-       (void) roulette();
-       (void) roulette();
-       (void) roulette();
-       (void) roulette();
-       (void) roulette();
-       return roulette();
-}