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add vigenere chiffere and caeser chiffere by teacher

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Schuledaniel
2026-02-04 13:46:00 +01:00
parent f4e858094e
commit ebee549aab
3 changed files with 202 additions and 1 deletions
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98
Zweites Jahr/Kryptologie/lehrer_caeser_versch.php Normal file
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<?php
// GEHT NICHT (richtig)
function caesar($text, $shift){
$result = "";
for ($i = 0; $i < strlen($text); $i++){
$letter = $text[$i];
$letter = ord($letter);
if ($letter > 65 && $letter >= 90){
$result .= chr(($letter-65 + $shift) %26 + 65);
} elseif ($letter > 97 && $letter >= 122 ) {
$result .= chr(($letter-97 + $shift) %26 + 97);
} else {
$result .=chr($letter);
}
#$result = $letter + $shift %36
}
return $result;
}
$output = "";
$text = "";
$shift = 0;
if ($_SERVER["REQUEST_METHOD"] === "POST") {
$text = $_POST["text"] ?? "";
$shift = intval($_POST["shift"] ?? 0);
if (isset($_POST["encrypt"])) {
$output = caesar($text, $shift);
}
if (isset($_POST["decrypt"])) {
$output = caesar($text, -$shift);
}
}
?>
<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="UTF-8">
<title>Caesar Chiffre</title>
<style>
body {
font-family: Arial, sans-serif;
background: #f4f4f4;
padding: 30px;
}
.box {
background: white;
padding: 20px;
max-width: 500px;
margin: auto;
border-radius: 8px;
}
textarea, input {
width: 100%;
padding: 10px;
margin-bottom: 10px;
}
button {
padding: 10px 20px;
margin-right: 10px;
}
label{
display: block;
margin-top: 10px;
}
</style>
</head>
<body>
<div class="box">
<h2>Caesar Chiffre</h2>
<form method="post">
<label for="text">Nachricht:</label>
<textarea name="text" rows="4"><?= htmlspecialchars($text) ?></textarea>
<label>Verschiebung:</label>
<input type="number" name="shift" min = 1 max = 26 value="<?= htmlspecialchars($shift) ?>">
<!--<input type="number" name="shift" value="<?= htmlspecialchars($shift) ?>">-->
<button type="submit" name="encrypt">Verschlüsseln</button>
<button type="submit" name="decrypt">Entschlüsseln</button>
<label for="result"> Verschlüsselte Nachricht:</label>
<textarea name="result" rows="4" readonly><?= htmlspecialchars($output ?: $text) ?></textarea>
</form>
</div>
</body>
</html>

99
Zweites Jahr/Kryptologie/vigenere.php Normal file
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<?php
function vigenere($text,$shift){
$result = "";
for ($i = 0; $i < strlen($text); $i++){
$shift = $shift[$i%strlen($shift)];
$letter = $text[$i];
$letter = ord($letter);
if ($letter > 65 && $letter >= 90){
$shift = ord($shift) - 65;
$result .= chr(($letter-65 + $shift) %26+ 65);
} elseif ($letter > 97 && $letter >= 122 ) {
$shift = ord($shift) - 97;
$result .= chr(($letter-97 + $shift) %26 + 97);
} else {
$result .=chr($letter);
}
}
return $result;
}
$output = "";
$text = "";
$shift = 0;
if ($_SERVER["REQUEST_METHOD"] === "POST") {
$text = $_POST["text"] ?? "";
$shift = $_POST["shift"] ?? 0;
if (isset($_POST["encrypt"])) {
$output = vigenere($text, $shift);
}
if (isset($_POST["decrypt"])) {
$output = vigenere($text, -$shift);
}
}
?>
<!DOCTYPE html>
<html lang="de">
<head>
<meta charset="UTF-8">
<title>Vigenère-Chiffre</title>
<style>
body {
font-family: Arial, sans-serif;
background: #f4f4f4;
padding: 30px;
}
.box {
background: white;
padding: 20px;
max-width: 500px;
margin: auto;
border-radius: 8px;
}
textarea, input {
width: 100%;
padding: 10px;
margin-bottom: 10px;
}
button {
padding: 10px 20px;
margin-right: 10px;
}
label{
display: block;
margin-top: 10px;
}
</style>
</head>
<body>
<div class="box">
<h2>Vigenère-Chiffre</h2>
<form method="post">
<label for="text">Nachricht:</label>
<textarea name="text" rows="4"><?= htmlspecialchars($text) ?></textarea>
<label>Verschiebung:</label>
<input type="text" name="shift" value="<?= htmlspecialchars($shift) ?>">
<button type="submit" name="encrypt">Verschlüsseln</button>
<button type="submit" name="decrypt">Entschlüsseln</button>
<label for="result"> Verschlüsselte Nachricht:</label>
<textarea name="result" rows="4" readonly><?= htmlspecialchars($output ?: $text) ?></textarea>
</form>
</div>
</body>
</html>