$cryptString = chr(bindec(strrev($newchar))); echo $cryptString;
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />$cryptString = null;
$textArray = str_split($this->text);
$keyArray = str_split($this->key);
$keyLength = count($keyArray);
$counter = 0;
/* Zeichen Oder verküpfen (Permutation)*/
$cryptArray = array();
foreach($textArray as $char) {
$cryptArray[] = $this->xOder($char, $keyArray[$counter]);
if ($counter == $keyLength) {
$counter = 0;
} else {
$counter++;
}
}
/* Substitution */
foreach($cryptArray as $char) {
switch(strlen(decbin(ord($char))))
{
case 7: $char = "0".decbin(ord($char));
break;
case 6: $char = "00".decbin(ord($char));
break;
case 5: $char = "000".decbin(ord($char));
break;
case 8: $char = decbin(ord($char));
}
$blocks = array();
$blocks[] = substr($char, 0,2);
$blocks[] = substr($char, 2,2);
$blocks[] = substr($char, 4,2);
$blocks[] = substr($char, 6,2);
$newchar = null;
foreach($blocks as $block) {
switch($block)
{
case '00': $newchar .= '10';
break;
case '01': $newchar .= '11';
break;
case '10': $newchar .= '00';
break;
case '11': $newchar .= '01';
break;
}
}
echo bindec(strrev($newchar))."<br>";
$cryptString .= chr(bindec(strrev($newchar)));
exit;
}
echo $newchar;
return $cryptString; switch(strlen(decbin(ord($char))))
{
case 7: $char = "0".decbin(ord($char));
break;
case 6: $char = "00".decbin(ord($char));
break;
case 5: $char = "000".decbin(ord($char));
break;
case 8: $char = decbin(ord($char));
}<?php // Datei gespeichert als UTF-8
mb_internal_encoding('UTF-8');
header('Content-Type: text/plain; charset=UTF-8');
$input = 'ÄÖÜäöü߀ abc 123';
$inputLen = mb_strlen($input);
for ($i = 0; $i < $inputLen; $i++) {
$utf8Char = mb_substr($input, $i, 1);
$bytes = str_split($utf8Char);
echo $utf8Char . "\t";
foreach ($bytes as $byte) {
echo sprintf('%08b ', ord($byte));
}
echo "\n";
}Ä 11000011 10000100
Ö 11000011 10010110
Ü 11000011 10011100
ä 11000011 10100100
ö 11000011 10110110
ü 11000011 10111100
ß 11000011 10011111
€ 11100010 10000010 10101100
00100000
a 01100001
b 01100010
c 01100011
00100000
1 00110001
2 00110010
3 00110011<?php // Datei als UTF-8 gespeichert
class Crypto
{
/**
*
* @param string $data
* @param string $key
* @return string
*/
public function encrypt($data, $key)
{
$bytes = str_split($data);
$res = '';
$i = 0;
$keyLength = strlen($key);
foreach ($bytes as $byte) {
$res .= $byte ^ $key[$i % $keyLength];
$i++;
}
return $res;
}
/**
*
* @param string $data
* @param string $key
* @return string
*/
public function decrypt($data, $key)
{
$bytes = str_split($data);
$res = '';
$i = 0;
$keyLength = strlen($key);
foreach ($bytes as $byte) {
$res .= $byte ^ $key[$i % $keyLength];
$i++;
}
return $res;
}
/**
*
* @param string $data
* @return string
*/
public function getBinaryRepresentation($data)
{
$bytes = str_split($data);
$res = '';
foreach ($bytes as $byte) {
$res .= sprintf('%08b ', ord($byte));
}
return trim($res);
}
/**
*
* @param string $data
* @return string
*/
public function getHexRepresentation($data)
{
$bytes = str_split($data);
$res = '';
foreach ($bytes as $byte) {
$res .= sprintf('%02X ', ord($byte));
}
return trim($res);
}
}
header('Content-Type: text/html; charset=UTF-8');
$c = new Crypto();
$data = 'ÄÖÜ߀ abc 123';
$key = '9]!X/Ü';
$encrypted = $c->encrypt($data, $key);
$decrypted = $c->decrypt($encrypted, $key);
echo '<table style="font-family: monospace;" border="1">';
printf("<tr><td>Original</td><td>%s</td><td>%s</td></tr>", $data, $c->getHexRepresentation($data));
printf("<tr><td>Encrypted</td><td>%s</td><td>%s</td></tr>", $encrypted, $c->getHexRepresentation($encrypted));
printf("<tr><td>Decrypted</td><td>%s</td><td>%s</td></tr>", $decrypted, $c->getHexRepresentation($decrypted));
echo '</table>';