stat.8bit (d82e286489da73321a47e329d98a98817b0438b6) stat.8bit (1130b656e5fe4c2d1ba299e024d1b40eaeebd380)
1#!/usr/bin/perl
2
3#
4# Perform primitive binning into 8-bit bins (take 8 bits of randomness
5# at a time) and see if the distribution is flat. The output should be
6# checked by eye - are all the numbers roughly the same?
7#
8# Redirect the output from this to a file - and make a cup of coffee while
9# it runs. This program is a CPU Hog!
10#
1#!/usr/bin/perl
2
3#
4# Perform primitive binning into 8-bit bins (take 8 bits of randomness
5# at a time) and see if the distribution is flat. The output should be
6# checked by eye - are all the numbers roughly the same?
7#
8# Redirect the output from this to a file - and make a cup of coffee while
9# it runs. This program is a CPU Hog!
10#
11# $Id$
11# $FreeBSD$
12#
13
14for ($i = 0; $i < (1024*32); $i++) {
15 open(BIN, "/dev/urandom") || die "Cannot open /dev/urandom - $!\n";
16 $len = sysread(BIN, $a, 256);
17 close(BIN);
18 if ($len > 0) {
19 for ($j = 0; $j < $len; $j++) {
20 $k = unpack("C", substr($a, $j, 1));
21 $bin[$k]++;
22 }
23 }
24}
25
26for ($i = 0; $i < 256; $i++) {
27 printf("%.2X ", $bin[$i]);
28}
29printf "\n";
12#
13
14for ($i = 0; $i < (1024*32); $i++) {
15 open(BIN, "/dev/urandom") || die "Cannot open /dev/urandom - $!\n";
16 $len = sysread(BIN, $a, 256);
17 close(BIN);
18 if ($len > 0) {
19 for ($j = 0; $j < $len; $j++) {
20 $k = unpack("C", substr($a, $j, 1));
21 $bin[$k]++;
22 }
23 }
24}
25
26for ($i = 0; $i < 256; $i++) {
27 printf("%.2X ", $bin[$i]);
28}
29printf "\n";