fix

Author: ReactMVC

App/Models/Cipher.php

@@ -0,0 +1,78 @@
+<?php
+
+namespace Monster\App\Models;
+
+class Cipher
+{
+    private $key;
+
+    public function __construct($key)
+    {
+        $this->key = $key;
+    }
+
+    public function encrypt($message)
+    {
+        // Custom encryption algorithm
+        $encrypted = str_rot13($message); // Example: using ROT13 substitution
+
+        // Additional encryption steps using the key
+        $encrypted = $this->xorEncrypt($encrypted);
+
+        return $encrypted;
+    }
+
+    public function decrypt($encryptedMessage)
+    {
+        // Reverse the additional encryption steps using the key
+        $decrypted = $this->xorDecrypt($encryptedMessage);
+
+        // Custom decryption algorithm
+        $decrypted = str_rot13($decrypted); // Example: reversing ROT13 substitution
+
+        return $decrypted;
+    }
+
+    private function xorEncrypt($message)
+    {
+        $key = $this->key;
+        $keyLength = strlen($key);
+        $messageLength = strlen($message);
+        $encrypted = '';
+
+        for ($i = 0; $i < $messageLength; $i++) {
+            $encrypted .= $message[$i] ^ $key[$i % $keyLength];
+        }
+
+        return base64_encode($encrypted);
+    }
+
+    private function xorDecrypt($encryptedMessage)
+    {
+        $key = $this->key;
+        $keyLength = strlen($key);
+        $encryptedMessage = base64_decode($encryptedMessage);
+        $messageLength = strlen($encryptedMessage);
+        $decrypted = '';
+
+        for ($i = 0; $i < $messageLength; $i++) {
+            $decrypted .= $encryptedMessage[$i] ^ $key[$i % $keyLength];
+        }
+
+        return $decrypted;
+    }
+}
+
+
+// Usage example:
+/*
+$key = "your_secret_key";
+$cipher = new Cipher($key);
+$message = "Hello, World!";
+$encryptedMessage = $cipher->encrypt($message);
+$decryptedMessage = $cipher->decrypt($encryptedMessage);
+
+echo "Original message: " . $message . "\n";
+echo "Encrypted message: " . $encryptedMessage . "\n";
+echo "Decrypted message: " . $decryptedMessage . "\n";
+*/