The sections have been modified a fair amount. The Entries menu has been extended to have: Fixing entries, Updating author info, Thanks for the help. The first two were moved from FAQ and the last one from About. The rationale for these, in order: entries and authors have to do with entries and most of the help involves entries. It also has to do with website but in 'about' it does not seem the right place, unless maybe it is renamed to 'Credits' or something (I am not suggesting this one way or the other). This one is debatable but that was the rationale. The Status menu has been extended to have: Markdown guidelines and Security policy. The rationale is that the markdown guidelines are part of contest guidelines and the security policy is about the status of the entries and how if there are any security problems they will not be addressed (instead of about the IOCCC). The FAQ was extended to have: Compiling entries, Running entries, How to help. The reason to not have compiling and running entries under Entries is because this is 'how to' and also the menu was too long. How to help seems like a good idea under FAQ too (was in About). About was extended to have the new 'about.html' page (from about.md). This is a rare case where a new file is useful as it fits under 'About'. The menu now is: Home page, About the IOCCC, The Judges, Contact us. I was pondering the 'About [the IOCCC]' at the top and also naming it 'About us' but it seemed like a link to index.html was necessary and as for 'about us' it seemed less clear as to whether it was about the judges or the contest itself. The FAQ has been updated slightly for this. After further inspection the bin/index.html and the inc/index.html links were removed from the about section. With these changes, renaming an item or slight reordering notwithstanding, I believe that #2006 is probably in good shape.
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width=300
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height=110>
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</a>
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<h1>The International Obfuscated C Code Contest</h1>
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<h2>1992/nathan - Worst abuse of the rules</h2>
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<h3>obfuscation by (trivial) encryption (source not exported)</h3>
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</div>
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<div class="navbar">
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<a class="Left" href="../marangon/index.html">← 1992/marangon</a>
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<a class="Left" href="../index.html">↑ 1992 ↑</a>
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<a class="Left" href="../vern/index.html">1992/vern →</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/nathan.c">C code</a>
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<a class="Right" href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/Makefile">Makefile</a>
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<a class="Right" href="#inventory">Inventory</a>
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<a class="Right" href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1992%2Fnathan%2Findex.html">✓</a>
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<h2 id="author">Author:</h2>
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<ul>
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<li>Name: <a href="../../authors.html#Nathan_Sidwell">Nathan Sidwell</a><br>
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Location: <a href="../../location.html#GB">GB</a> - <em>United Kingdom of Great Britain and Northern Ireland</em> (<em>United Kingdom</em>)</li>
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<h2 id="to-build">To build:</h2>
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<pre><code> make all</code></pre>
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<p>There is an Alternate version which is what was originally published. See
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<a href="#alternate-code">Alternate code</a> below for more information.</p>
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<h2 id="to-use">To use:</h2>
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<pre><code> ./nathan
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# enter some text</code></pre>
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<h2 id="try">Try:</h2>
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<p>To see some other fun uses:</p>
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<pre><code> ./try.sh</code></pre>
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<h2 id="alternate-code">Alternate code:</h2>
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<p>At the time of publication, the judges could not publish the code due to the
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US export control over encryption. The code that was published would, if run,
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allow one to get the instructions of how to receive (via email) the actual
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entry. However, on Sat Mar 4 20:09:35 2023 UTC, the previously unseen code was
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published. This meant that the old code was not set to compile via the Makefile.
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This alternate code is that previous version.</p>
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<h2 id="alternate-build">Alternate build:</h2>
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<pre><code> make alt</code></pre>
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<h3 id="alternate-use">Alternate use:</h3>
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<pre><code> ./nathan.alt</code></pre>
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<p><strong>IMPORTANT NOTE</strong>: it is unknown if the email in the code is still valid and as
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one does not need to email the author for the submitted code one should not
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email it. In other words, please do <strong>NOT</strong> send such an email.</p>
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<h2 id="judges-remarks">Judges’ remarks:</h2>
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<h3 id="warning">WARNING:</h3>
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<p>The judges make no claim as to the strength or security
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of this program. It is likely to be nil, or the next
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best thing to it. Still, you might consider installing
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it in <code>/usr/games/nathan</code>. :-)</p>
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<h3 id="note-from-the-judges-about-the-winning-category">Note from the judges about the winning category:</h3>
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<p>The ‘winning’ category is also open to question. One could say
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that it is a ‘file obfuscator’. One could also say that it
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unintentionally abused the intent of rule #7 (that programs
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should be freely re-distributable). We suspect that the author
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may not have intended to do this, but that is the way things go
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sometimes.</p>
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<p>BTW, ‘<em>abuse of the rules</em>’ entries do not violate the rules.
|
||
Entries that violate the rules are disqualified. Abuse of the
|
||
rules entries are ones that tend to ‘stretch’ the limits and
|
||
take the contest into unexpected territory.</p>
|
||
<h3 id="historical-notes-from-the-judges-about-this-entry">Historical notes from the judges about this entry:</h3>
|
||
<p>The US International Traffic in Arms Regulations controls certain exportations
|
||
going out of the United States. The U.S. Munitions List gives the specific
|
||
categories of restricted exports. Because this entry at one time appeared to
|
||
fall under this restricted category, the judges originally were not able to
|
||
distribute some winning entries outside of the US.</p>
|
||
<p>Nathan Sidwell stated that he was willing to distribute the winning source. To
|
||
read HIS instructions of how to obtain his winning program one was able to run:</p>
|
||
<pre><code> make nathan
|
||
./nathan</code></pre>
|
||
<p>to learn how to get a copy of the code.</p>
|
||
<p>When someone compiled and ran the code as originally distributed (see:
|
||
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/nathan.orig.c">nathan.orig.c</a> the code printed
|
||
the following message (sic):</p>
|
||
<blockquote>
|
||
<p>Export of this program from the USA is governed by the US<br>
|
||
Munitions List from the ITAR (International Traffic in Arms<br>
|
||
Regulations). This list gives the specific categories of<br>
|
||
restricted exports and includes cryptographic exports. Traffic<br>
|
||
entirely external to, entirely internal to, or into the USA is<br>
|
||
not restricted.<br>
|
||
To obtain a copy of the program, email to <strong>EMAIL_ADDRESS_OMITTED</strong><br>
|
||
with a subject “IOCCC request”. If you know that your ‘From’<br>
|
||
line is incorrect, add a single line<br>
|
||
“replyto you@your.correct.address” to the body of the message.<br>
|
||
A deamon will autoreply.<br>
|
||
WARNING: You must not re-export this out of the USA, or else<br>
|
||
the men in black might get you.</p>
|
||
</blockquote>
|
||
<p>Today, the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/nathan.c">nathan.c</a> source code
|
||
is the source code is what you would have received had you
|
||
successfully completed the above instructions.</p>
|
||
<p>Today, the above instructions are <strong>no longer necessary</strong>.
|
||
There have been reproduced above to provide historical context. Even so, the
|
||
<a href="#alternate-code">Alternate code</a> allows you to see what the originally
|
||
published code did.</p>
|
||
<h3 id="personal-note-from-chongo">Personal note from chongo:</h3>
|
||
<p>I think the situation showed just how ridiculous US crypto regulations really
|
||
were/are. Certain US federal officials can get away with shipping arms to
|
||
certain nations in apparent violation of US laws, but I personally can’t
|
||
re-distribute a program contest entry to the network!</p>
|
||
<h3 id="updated-personal-note-from-chongo">Updated personal note from chongo:</h3>
|
||
<p>We removed the email address from the above quote (although you can still see it
|
||
in the <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/nathan.orig.c">nathan.orig.c</a> and
|
||
<a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/nathan.alt.c">nathan.alt.c</a> code) because sending
|
||
email to that address is not required today and it is unknown if it is still
|
||
valid. The <a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/nathan.c">nathan.c</a> file now contains the
|
||
source you would have received in reply.</p>
|
||
<p>Thankfully much of the ridiculous US crypto regulations has been
|
||
amended to the extent where the above historical “<em>workaround</em>” is
|
||
<strong>no longer required</strong>.</p>
|
||
<h2 id="authors-remarks">Author’s remarks:</h2>
|
||
<h3 id="program-use">Program use</h3>
|
||
<p>This program is a hello world text encryptor/decryptor. It uses an
|
||
enigma (I think) style encryption algorithm, where the encryption
|
||
key character is modified by a value, determined from the previous
|
||
character. Non-printable characters (those with ASCII values < <code>' '</code>
|
||
or > <code>0x7e</code>) are passed unaltered, thus any kind of file may be
|
||
successfully processed, but if the original is printable, the
|
||
processed file will be too. The input is read from <code>stdin</code>, and the
|
||
output presented to <code>stdout</code>. The key, a text string, is presented as
|
||
a command argument. This is optional, and if omitted, the file is
|
||
self-{de,en}crypted. To specify decryption, a <code>-</code> should be given
|
||
before the key. (Actually encryption and decryption proper inverse
|
||
operations, so you can use decrypt to scramble and encrypt to
|
||
descramble, if you’re perverse.)</p>
|
||
<h3 id="portability-a-little-knowledge-is-a-dangerous-thing">Portability (A little knowledge is a dangerous thing)</h3>
|
||
<p>It’s written in ANSI C, and doesn’t even assume an ASCII character
|
||
set, (it has an array of the characters to convert), so should be
|
||
portable across many platforms. It passes <code>gcc -ansi -pedantic -O -Wall</code> with no warnings (You may get assignment in conditional
|
||
warnings on other platforms though). Because I’ve heard that
|
||
conditional jumps slow down fast processors, I’ve eliminated all
|
||
the <code>if</code>s from the code; indeed, as its only one statement, it should
|
||
compile to one instruction and a suitably designed CISC machine. To
|
||
speed compilation, there is only one statement in the loop, so that
|
||
another scoping level does not need to be opened.</p>
|
||
<p>Being an encryptor/decryptor, you probably want the source code to
|
||
be obfuscated, to hide the algorithm.</p>
|
||
<h3 id="obfuscation">Obfuscation</h3>
|
||
<p>In spite of the fact that it looks like a nice friendly hello world
|
||
program, it isn’t (as documented above). (Short lines have been padded,
|
||
as you’ll find if you look at an encrypted copy of the source.)</p>
|
||
<p>I’ve also named some of the macros from commonly used functions, just to keep
|
||
things muddy. Of course, all the variables are misnamed. The program is kept
|
||
simply (one for statement), by serious overuse of <code>,</code> and <code>?:</code>. These are really
|
||
confusing when used together, nested or put in argument lists (is that a comma
|
||
operator, or argument separator?).</p>
|
||
<!--
|
||
|
||
Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
|
||
|
||
You are free to share and adapt this file under the terms of this license:
|
||
|
||
Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
|
||
|
||
For more information, see:
|
||
|
||
https://creativecommons.org/licenses/by-sa/4.0/
|
||
|
||
-->
|
||
<!-- AFTER: last line of markdown file: 1992/nathan/README.md -->
|
||
|
||
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|
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|
||
|
||
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|
||
|
||
<div id="inventory">
|
||
<h1 id="inventory-for-1992nathan">Inventory for 1992/nathan</h1>
|
||
</div>
|
||
<h2 id="primary-files">Primary files</h2>
|
||
<ul>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/nathan.c">nathan.c</a> - entry source code</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/Makefile">Makefile</a> - entry Makefile</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/nathan.alt.c">nathan.alt.c</a> - alternate source code</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/nathan.orig.c">nathan.orig.c</a> - original source code</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/try.sh">try.sh</a> - script to try entry</li>
|
||
</ul>
|
||
<h2 id="secondary-files">Secondary files</h2>
|
||
<ul>
|
||
<li><a href="1992_nathan.tar.bz2">1992_nathan.tar.bz2</a> - download entry tarball</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/README.md">README.md</a> - markdown source for this web page</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/.entry.json">.entry.json</a> - entry summary and manifest in JSON</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/.gitignore">.gitignore</a> - list of files that should not be committed under git</li>
|
||
<li><a href="https://github.com/ioccc-src/temp-test-ioccc/blob/master/1992/nathan/.path">.path</a> - directory path from top level directory</li>
|
||
<li><a href="index.html">index.html</a> - this web page</li>
|
||
</ul>
|
||
<hr style="width:10%;text-align:left;margin-left:0">
|
||
<h4>
|
||
Jump to: <a href="#">top</a>
|
||
</h4>
|
||
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||
|
||
</div>
|
||
|
||
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|
||
<!-- START: this line starts content from: inc/footer.inventory.html -->
|
||
|
||
<!--
|
||
|
||
Copyright © 1984-2024 by Landon Curt Noll. All Rights Reserved.
|
||
|
||
You are free to share and adapt this file under the terms of this license:
|
||
|
||
Creative Commons Attribution-ShareAlike 4.0 International (CC BY-SA 4.0)
|
||
|
||
For more information, see:
|
||
|
||
https://creativecommons.org/licenses/by-sa/4.0/
|
||
|
||
-->
|
||
|
||
<div class="footer">
|
||
|
||
<div id="copyright"><h3>Copyright © 1984-2024 by Landon Curt Noll:
|
||
<a href="https://creativecommons.org/faq/#what-does-some-rights-reserved-mean"
|
||
target="_blank"
|
||
rel="license noopener noreferrer">Some Rights Reserved</a></h3>
|
||
<p>
|
||
This work is <b>licensed by Landon Curt Noll</b> under
|
||
<b><a href="https://creativecommons.org/licenses/by-sa/4.0/?ref=chooser-v1"
|
||
target="_blank"
|
||
rel="license noopener noreferrer"
|
||
style="display:inline-block;">CC BY-SA 4.0</a></b>.
|
||
<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
|
||
src="../../png/cc.png"
|
||
alt="cc inside circle symbol">
|
||
<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
|
||
src="../../png/by.png"
|
||
alt="person inside circle symbol">
|
||
<img style="height:22px!important;margin-left:3px;vertical-align:text-bottom;"
|
||
src="../../png/sa.png"
|
||
alt="arrow looping back on itself inside circle symbol"><br>
|
||
You should <b>carefully review</b> the
|
||
<b><a href="https://creativecommons.org/licenses/by-sa/4.0/legalcode.en"
|
||
target="_blank"
|
||
rel="license noopener noreferrer">CC BY-SA 4.0 LEGAL CODE</a></b>
|
||
before using the licensed material.<br>
|
||
You may wish to review the
|
||
<b><a href="../../license.html"
|
||
target="_blank"
|
||
rel="license noopener noreferrer">highlights of some of the key features and terms</a></b>
|
||
of <b>CC BY-SA 4.0</b>.<br>
|
||
</p>
|
||
</div>
|
||
|
||
<div id="coda"><h3>Coda</h3>
|
||
<p>
|
||
<a href="https://validator.w3.org/nu/?doc=https%3A%2F%2Fioccc-src.github.io%2Ftemp-test-ioccc%2F1992%2Fnathan%2Findex.html" rel="nofollow">Nu HTML check this web page</a><br>
|
||
<a href="#top">Jump to top</a> <a href="#content">Jump to Content</a> <a href="#inventory">Jump to Inventory</a><br>
|
||
</p>
|
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</div>
|
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</body>
|
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</html>
|
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