init commit

api/app/Utils/Crypt.php

@@ -0,0 +1,91 @@
+<?php
+
+namespace App\Utils;
+
+class Crypt
+{
+    private static $key = 'd82499ef6072d87a2f547ba57aa38825';
+    private static $rounds = 1001;
+    private static $customCharset = '-._~0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
+
+    public static function XORCrypt($text)
+    {
+        $data = self::addPadding($text, 32);
+        $encryptedData = self::convertToCustomCharset($data);
+        $key = self::convertToCustomCharset(self::$key);
+        $keyLength = strlen($key);
+
+        for ($j = 0; $j < self::$rounds; $j++) {
+            $encryptedData = strrev($encryptedData);
+
+            $start = ($j * 12) % $keyLength;
+            $keyPart = substr($key, $start, 12);
+            $encryptedData = self::applyXOREncryption($encryptedData, $keyPart);
+        }
+
+        return $encryptedData;
+    }
+
+    private static function addPadding($text, $blockSize)
+    {
+        $paddingLength = $blockSize - (strlen($text) % $blockSize) - 1;
+        $padding = self::generateRandomPadding($paddingLength);
+
+        return $text . '.' . $padding;
+    }
+
+    private static function convertToCustomCharset($inputString)
+    {
+        $output = '';
+
+        for ($i = 0; $i < strlen($inputString); $i++) {
+            $char = $inputString[$i];
+            $charIndex = strpos(self::$customCharset, $char);
+
+            if ($charIndex === false) {
+                $output .= '~';
+            } else {
+                $output .= $char;
+            }
+        }
+
+        return $output;
+    }
+
+    private static function generateRandomPadding($length)
+    {
+        $padding = '';
+        $charsetLength = strlen(self::$customCharset);
+
+        for ($i = 0; $i < $length; $i++) {
+            $randomIndex = rand(0, $charsetLength - 1);
+            $padding .= self::$customCharset[$randomIndex];
+        }
+
+        return $padding;
+    }
+
+    private static function applyXOREncryption($data, $key, $decrypt = false)
+    {
+        $result = '';
+        $keyLength = strlen($key);
+        $charsetLength = strlen(self::$customCharset);
+
+        for ($i = 0; $i < strlen($data); $i++) {
+            $char = $data[$i];
+            $keyChar = $key[$i % $keyLength];
+
+            $charIndex = strpos(self::$customCharset, $char);
+            $keyIndex = strpos(self::$customCharset, $keyChar);
+
+            if ($charIndex !== false && $keyIndex !== false) {
+                $encryptedIndex = $decrypt ? ($charIndex - $keyIndex + $charsetLength) % $charsetLength : ($charIndex + $keyIndex) % $charsetLength;
+                $result .= self::$customCharset[$encryptedIndex];
+            } else {
+                $result .= '~';
+            }
+        }
+
+        return $result;
+    }
+}