Secret Decoder Ring (Felcode)

readme.txt

Felcode
by Deozaan and Allen
https://www.donationcoder.com/forum/index.php?topic=3283.0


::Sample Dictionary:: 
================
It just follows each key's placement as to row 1, 2 or 3 and what numbers it's between, can be done in your head by looking at the keyboard but that will slow you down :-p

    12  23  34  45   56  67   78  89   90  0-
1   Q   W   E   R    T   Y    U   I    O   P
2   A   S   D   F    G   H    J   K    L
3   Z   X   C   V    B   N    M

So Hello would be:

267 134 290 290 190
 H   E   L   L   O
 
This example is unable to encode numbers and symbols, so the default dictionary uses "999" to represent a space, numbers start with two zeroes, and most other symbols are just repeated three times.

felcode.php

<?php

//error_reporting(2047);

ob_start();

$codeArray = createArray();
$makeDict = new configParse;
$dictArray = $makeDict->parseFile($_POST['dictionary']);
if (isset($_POST['input'])) {
    if (isset($_POST['encrypt']) && strlen($_POST['input']) > 1500) {
        $error = '<h3>Cannot encrypt more than 1,500 characters</h3>';
        $output = $_POST['input'];
    }
    $output = encrypt($_POST['input'], $_POST['double']);
} else {
    $output = '';
}

if (isset($_POST['dictionary'])) { $dictionary = $_POST['dictionary']; } else { $dictionary = ''; }

echo "<title>FelCode - Deozaan.com</title>";
echo "<h1>FelCode -- Felicia's Code</h1>\n";
if (isset($error)) { echo $error; }
echo "As discussed at <a href=\"http://www.donationcoder.com/Forums/bb/index.php?topic=3283.0\">DonationCoder.com</a>.<br /><br />\n";
echo "<form method='post' action=''>\n";
echo "<textarea name=\"input\" style=\"width:100%\" rows=\"5\" cols=\"72\""
           . " width=\"90%\" wrap=\"virtual\">$output</textarea><br />";
echo "<input type=\"submit\" name=\"encrypt\" value=\"Encrypt\" />\n";
echo "<input type=\"submit\" name=\"decrypt\" value=\"Decrypt\" />\n";
echo "<input type=\"checkbox\" name=\"double\" value=\"1\"";
if ($_POST['double'] == 1) { echo " checked=\"yes\""; }
echo " />Double Encryption/Decryption\n";
//echo '<br />Define your own dictionary:<br />';
//echo "<textarea name=\"dictionary\" style=\"width:100%\" rows=\"15\" cols=\"72\""
//           . " width=\"90%\" wrap=\"virtual\">$dictionary</textarea><br />";
echo "</form>\n";
ob_end_flush();

function createArray() {
    $codeArray['0'] = '000';
    $codeArray['1'] = '001';
    $codeArray['2'] = '002';
    $codeArray['3'] = '003';
    $codeArray['4'] = '004';
    $codeArray['5'] = '005';
    $codeArray['6'] = '006';
    $codeArray['7'] = '007';
    $codeArray['8'] = '008';
    $codeArray['9'] = '009';
    $codeArray['q'] = 112;
    $codeArray['w'] = 123;
    $codeArray['e'] = 134;
    $codeArray['r'] = 145;
    $codeArray['t'] = 156;
    $codeArray['y'] = 167;
    $codeArray['u'] = 178;
    $codeArray['i'] = 189;
    $codeArray['o'] = 190;
    $codeArray['p'] = '10-';
    $codeArray['a'] = 212;
    $codeArray['s'] = 223;
    $codeArray['d'] = 234;
    $codeArray['f'] = 245;
    $codeArray['g'] = 256;
    $codeArray['h'] = 267;
    $codeArray['j'] = 278;
    $codeArray['k'] = 289;
    $codeArray['l'] = 290;
    $codeArray['z'] = 312;
    $codeArray['x'] = 323;
    $codeArray['c'] = 334;
    $codeArray['v'] = 345;
    $codeArray['b'] = 356;
    $codeArray['n'] = 367;
    $codeArray['m'] = 378;
    $codeArray['Q'] = 412;
    $codeArray['W'] = 423;
    $codeArray['E'] = 434;
    $codeArray['R'] = 445;
    $codeArray['T'] = 456;
    $codeArray['Y'] = 467;
    $codeArray['U'] = 478;
    $codeArray['I'] = 489;
    $codeArray['O'] = 490;
    $codeArray['P'] = '40-';
    $codeArray['A'] = 512;
    $codeArray['S'] = 523;
    $codeArray['D'] = 534;
    $codeArray['F'] = 545;
    $codeArray['G'] = 556;
    $codeArray['H'] = 567;
    $codeArray['J'] = 578;
    $codeArray['K'] = 589;
    $codeArray['L'] = 590;
    $codeArray['Z'] = 612;
    $codeArray['X'] = 623;
    $codeArray['C'] = 634;
    $codeArray['V'] = 645;
    $codeArray['B'] = 656;
    $codeArray['N'] = 667;
    $codeArray['M'] = 678;
    $codeArray[' '] = 999;
    return $codeArray;
}

    
function encrypt($input, $double) {
    $codeArray = createArray();
    $len = 1;
    $dec = 3;
    if (isset($_POST['decrypt'])) {
        $codeArray = array_flip($codeArray);
        $len = 3;
        $dec = 'true';
    }
    $output = '';
    for ($i=0;$i<strlen($input);$i+=$len) { // access each character ($i) of $input one at a time
        $phrase = substr($input, $i, $len);
        if (isset($codeArray[$phrase])) {
            $output .= $codeArray[$phrase];
        } else {
            if ($dec === 'true') {
                if ($phrase{0} === $phrase{1} && $phrase{1} === $phrase{2}) {
                    $output .= $phrase{0};
                } else {
                    $output .= $phrase;
                }
            } else {
                for ($j=0;$j<$dec;$j++) {
                    $output .= $phrase;
                }
            }
        }
    }
    
    if ($double == 1) {
        $output = encrypt($output, 0);
    }
    
    return $output;
}

class configParse {
    var $file;
    var $data;
    function parseFile($file) {
        $this->file = explode("\n",$file);
        foreach ( $this->file as $option ) {
            if ( !preg_match('#^;#im',$option) && strlen(trim($option)) > 3 ) {
                if ( preg_match('#^((?!;)[^= ]+) *= *(.+)#im',$option,$option) ) {
                    $this->data[trim($option[1])] = trim($option[2]);
                }
            }
        }
        return $this->data;
    }
}

?>