Censorship

17 Dec 2003

      There are two pieces of code included in this message.  Or, at least,
there would be if I were allowed to express my ideas.  Accordingly,
the first piece of code has been carefully censored.

The second piece of code is a Perl script which does the censoring.
The model is that of a tape which the censor lays across anything
"offensive."

The Perl script has -C and -Perl modes which try to preserve comments.
(They can be fooled, so you should look over the results before
distributing.)  You can also specify the string which is "printed" on
the tape.

The idea is that every time I write a piece of code which I cannot
distribute freely, a censored version will be mailed to appropriate
newsgroups, mailing lists, newspapers, and politicians.

This should have the effect of continually raising and dramatizing the
issue, as well as demonstrating repeatedly how ridiculous it is.

I would hope that some decades into the future we will be able to look
through the archives for these scraps of censored code and find it
amusing.

--------------------------------------------------
CENSORED BY THE UN

/* A reference implementation of SHA1. */

ITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVE
RNMENT CENSORED BY THE UNITED STATES GOVERNME
NT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED ST
ATES GOVERNMENT CENSORED BY THE UNITED STATES

/* Circular left shift operation. */
 GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED 

BY THE UNITED STATES G

OVERNMENT CENSORED BY THE UN
I 
  TED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE
   UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY
   THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORE
  D BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CEN
  SORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT
   CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERN
  MENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GO
  VERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STAT
ES

/* Prototypes */
 GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY TH
E UNITED STATES GOVERNMENT CENSORED BY THE UNITED S

TATES 
G
  OVERNMENT CENSORED 

  BY THE UNITED STATES G

  /* Hash is contained in H array. */
  OVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITE
D

 STATES GOVERNMENT CENSORED BY THE UNITED STATES G
O
  VERNME
  NT CEN
  SORED BY THE UNITED STAT
  ES GOVERNMENT CENSORED BY THE 
  UNITED STATES GOVERNMENT CENS
  ORED BY THE UNITED ST

  /* Initialize H array here. */
  ATES GOVERNMENT CE
  NSORED BY THE UNIT
  ED STATES GOVERNME
  NT CENSORED BY THE
   UNITED STATES GOV

  ERNMENT CENSORED BY
   THE UNITED STATES G
  OVERNMENT CENSORED BY THE UNITED STATES G
    OVERNMENT CENSORED BY THE UNITED STAT
      ES GOVERNMENT CENSORE
    D
     BY TH
      E UNITED STATES GOVERNMENT CENSORED
	 BY THE UNITED ST
	ATES GOVERNMENT CE
      N
      SORED 
	BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE 
	UNITED S
      T
    A

    TES GOVERNMENT 
      CENSORED BY T
    H
    E UNIT
      ED STATES GOVERNMENT CENS
      ORED BY THE UNI
	TED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATE
      S

      /* Handle latest character. */
       GOV
      ERNMENT CENSO
    R
  E

  /* Add padding byte. */
  D BY THE UNITE
    D STATES GOVERNMENT 
    CENS
  O
  RED BY THE UNITED STATES GOVERNMEN
    T CENSORED BY THE UN
    ITED

    /* Pad out with zeros. */
     STATES GOVERNMENT CEN
      SORED BY THE 
    U

    NITED STATES GOVERNMENT C
    ENSORED BY THE 
      UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED ST
    A

    TES GO
  V
  ERNMENT CENSORED BY 
      THE UNITED STATES GOVERNM
      ENT CENSORED BY
	 THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNIT
      E

      /* Add padding byte. */
      D ST
      ATES GOVERNMENT CENS
      ORED

  BY THE
     UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSO
    RED BY T
  H

  /* Pad out with zeros. */
  E UNITED STATES GOVERN
    MENT CENSORED

  /* Add length information */
  BY THE UNITED STATES GOVERNMENT CENSORED BY THE 
  UNITED STATES GOVERNMENT CENSORED BY THE UNITED 
  STATES GOVERNMENT CENSORED BY THE UNITED STATES
   GOVERNMENT CENSORED BY THE UNITED STATES 

  GOVERNMENT CENSORED BY THE UNITED STATES GOVERNME
  NT CENSORED BY THE UNITED STATES GOVERNMENT CENSO
  RED BY THE UNITED STATES GOVERNMENT CENSORED BY 
  THE UNITED STATES GOVERNMENT CENSORED BY T

  /* Final block. */
  HE UNITED STATES GOVERN
  MENT CENSORED B
    Y THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNI
  T
E

D STATES GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSO
R
  ED BY THE UNITED STATES GOVE
  RNMENT CENSORED BY T
  HE UNI
  TED ST
  ATES GOVERNMENT CEN

  SORED BY THE UNITED STATE
    S GOVERNMENT CENSORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATES GO
  V

  ERNMENT CENSORED BY THE UNI
    TED STATES GOVERNMENT CENSORED BY THE UNITED STATES

  GOVERNMEN
  T CENSORE
  D BY THE 
  UNITED ST
  ATES GOVE

  RNMENT CENSORED BY THE UN
    ITED STATES GOVERNMENT CENSORED BY THE UNITED STAT
    ES GOVERNMENT CENSORED BY THE UNITED STATES GOVERN
    MENT CENSORED B
      Y THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED STATE
    S

  GOVERNMENT CENSORED BY THE
     UNITED STATES GOVERNMENT CENSORED BY THE UNITED S
    TATES GOVERNMENT CENSORED BY THE UNITED STATES GOV
    ERNMENT CENSORE
      D BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED ST
    A
  T
  ES GOVERNMENT CENSORED BY 
    THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED 
    STATES GOVERNMENT CENSORED BY THE UNITED STATES GO
    VERNMENT CENSOR
      ED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED S
    T
  A
  TES GOVERNMENT CENSORED BY
     THE UNITED STATES GOVERNMENT CENSORED BY THE UNITE
    D STATES GOVERNMENT CENSORED BY THE UNITED STATES 
    GOVERNMENT CENS
      ORED BY THE UNITED STATES GOVERNMENT CENSORED BY THE UNITED

  S

  TATES GOVE
  RNMENT CEN
  SORED BY T
  HE UNITED 
  STATES GOV
E

--------------------------------------------------
#!/usr/local/bin/perl -w

require 5;
use strict;

$main::censor_string = "CENSORED BY THE UNITED STATES GOVERNMENT ";
$main::next_censor_char = 0;
$main::c_mode = 0;
$main::Perl_mode = 0;

sub main {
    my($switch);
    while( $switch = shift(@ARGV) ) {
	if( $switch =~ /^-/ ) {
	    if( $switch eq "-C" ) {
		$main::c_mode = 1;
	    }
	    elsif( $switch eq "-Perl" ) {
		$main::Perl_mode = 1;
	    }
	    elsif( $switch eq "-s" ) {
		if( scalar(@ARGV) > 0 ) {
		    $main::censor_string = shift(@ARGV);
		}
		else {
		    die "usage: censor.pl [-C] [-Perl] [-s censor-string]\n";
		}
	    }
	    else {
		die "usage: censor.pl [-C] [-Perl] [-s censor-string]\n";
	    }
	}
	else {
	    die "usage: censor.pl [-C] [-Perl] [-s censor-string]\n";
	}
    }

    @main::censor_char_list = split(//, $main::censor_string);

    while(<>) {
	chomp;
	if( $main::c_mode && /^\s*\/\*.*\*\/\s*$/ ) {
	    print "$_\n";
	}
	elsif( $main::c_mode && /^(\s*)(\S*.*\S|\S)(\s*\/\*.*\*\/\s*)$/ ) {
	    my($censored) = get_censor_chars(length($2));
	    print "$1$censored$3$4\n";
	}
	elsif( $main::Perl_mode && /^\s*#.*$/ ) {
            print "$_\n";
        }
	elsif( $main::Perl_mode && /^(\s*)(\S*.*\S|\S)(\s*#.*)$/ ) {
            my($censored) = get_censor_chars(length($2));
            print "$1$censored$3\n";
	}
	elsif( /^(\s*)(\S.*\S)(\s*)$/ ) {
	    my($censored) = get_censor_chars(length($2));
	    print "$1$censored$3\n";
	}
	elsif( /^(\s*)(\S)(\s*)$/ ) {
	    my($censored) = get_censor_chars(length($2));
	    print "$1$censored$3\n";
	}
	else {
	    print "$_\n";
	}
    }
}

sub get_censor_chars {
    my($length) = shift;

    my($i);
    my(@char_list);
    for( $i=0; $i < $length; $i++ ) {
	push(@char_list, $main::censor_char_list[$main::next_censor_char]);
	$main::next_censor_char = ($main::next_censor_char + 1) % length($main::censor_string);
    }

    my($censored_string) = join('', @char_list);
    return $censored_string;
}

main();

Monty Cantsin
Editor in Chief
Smile Magazine
http://www.neoism.org/squares/smile_index.html
http://www.neoism.org/squares/cantsin_10.htm

Subject: Censorship
To: cypherpunks@algebra.com
25BA1A9F5B9010DD8C752EDE887E9AF3 [Cantsin Protocol No. 2]
94C43229A76383D818D39952F7A41ACA0394C6FE
81D2E52A55F1CE8DE45EE05CE477D184E310E2AA
-22DE 22DE
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

Censorship

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