AES256 implemented

Author: nsiatras

berry/encryption.php

@@ -1,4 +1,5 @@
 <?php
 
 require_once(__DIR__ . "/encryption/AES128Encryption.php");
+require_once(__DIR__ . "/encryption/AES256Encryption.php");
 ?>

berry/encryption/AES256Encryption.php

@@ -0,0 +1,72 @@
+<?php
+
+class AES256Encryption
+{
+
+    private static string $OPENSSL_CIPHER_NAME = "aes-256-cbc"; //Name of OpenSSL Cipher 
+    private static int $CIPHER_KEY_LEN = 32; // 32 bytes (256 bits)
+
+    static function getRandomIV(): string
+    {
+        $characters = '0123456789abcdefghijklmnopqrstuvwxyz!@#$%^&*()-=_+ABCDEFGHIJKLMNOPQRSTUVWXYZ';
+        $charactersLength = strlen($characters);
+        $randomString = '';
+        for ($i = 0; $i < AES256Encryption::$CIPHER_KEY_LEN; $i++)
+        {
+            $randomString .= $characters[rand(0, $charactersLength - 1)];
+        }
+
+        return $randomString;
+    }
+
+    /**
+
+     * Encrypt data using AES Cipher (CBC) with 256 bit key
+     * @param type $key - key to use should be 32 bytes long (256 bits)
+     * @param type $data - data to encrypt
+     * @return encrypted data in base64 encoding with iv attached at end after a :
+     */
+    static function encrypt(string $key, string $data): string
+    {
+        $iv = AES256Encryption::getRandomIV();
+
+        if (strlen($key) < AES256Encryption::$CIPHER_KEY_LEN)
+        {
+            $key = str_pad($key, AES256Encryption::$CIPHER_KEY_LEN, "0"); //0 pad to len 32
+        }
+        else if (strlen($key) > AES256Encryption::$CIPHER_KEY_LEN)
+        {
+            $key = substr($str, 0, AES256Encryption::$CIPHER_KEY_LEN); //truncate to 32 bytes
+        }
+
+        $encodedEncryptedData = base64_encode(openssl_encrypt($data, AES256Encryption::$OPENSSL_CIPHER_NAME, $key, OPENSSL_RAW_DATA, $iv));
+        $encodedIV = base64_encode($iv);
+        $encryptedPayload = $encodedEncryptedData . ":" . $encodedIV;
+        return $encryptedPayload;
+    }
+
+    /**
+     * Decrypt data using AES Cipher (CBC) with 256 bit key
+     * @param type $key - key to use should be 32 bytes long (256 bits)
+     * @param type $data - data to be decrypted in base64 encoding with iv attached at the end after a :
+     * @return decrypted data
+     */
+    static function decrypt(string $key, string $data): string
+    {
+        if (strlen($key) < AES256Encryption::$CIPHER_KEY_LEN)
+        {
+            $key = str_pad($key, AES256Encryption::$CIPHER_KEY_LEN, "0"); //0 pad to len 32
+        }
+        else if (strlen($key) > AES256Encryption::$CIPHER_KEY_LEN)
+        {
+            $key = substr($str, 0, AES256Encryption::$CIPHER_KEY_LEN); //truncate to 32 bytes
+        }
+
+        $parts = explode(':', $data); //Separate Encrypted data from iv.
+        $decryptedData = openssl_decrypt(base64_decode($parts[0]), AES256Encryption::$OPENSSL_CIPHER_NAME, $key, OPENSSL_RAW_DATA, base64_decode($parts[1]));
+        return $decryptedData;
+    }
+
+}
+
+?>

debug.php

@@ -1,11 +1,14 @@
 <?php
-require_once(__DIR__ . "/berry/utils.php"); // Include berry utils package
+require_once(__DIR__ . "/berry/encryption.php"); // Include berry encryption package
 
-$crawlerDetector = new CrawlerDetector();
-$crawlerName = $crawlerDetector->getCrawlerName();
+$encryptionKey = "%2IR5wdW%Q7bLE*v+v4WpNfM*pkeM4sz"; // 32characters encryption key
+$stringToEncrypt = "This is a simple text we need to encrypt";
 
-if ($crawlerName != "")
-{
-    print "Crawler Detected: " . $crawlerName;
-}
+print "Original String: " . $stringToEncrypt."<br>";
+
+$encryptedString = AES256Encryption::encrypt($encryptionKey,$stringToEncrypt);
+print "Encrypted String: " . $encryptedString."<br>";
+
+$descryptedString = AES256Encryption::decrypt($encryptionKey, $encryptedString);
+print "Decrypted String: " . $descryptedString."<br>";
 ?>

nbproject/private/private.xml

@@ -2,6 +2,9 @@
 <project-private xmlns="http://www.netbeans.org/ns/project-private/1">
     <editor-bookmarks xmlns="http://www.netbeans.org/ns/editor-bookmarks/2" lastBookmarkId="0"/>
     <open-files xmlns="http://www.netbeans.org/ns/projectui-open-files/2">
-        <group/>
+        <group>
+            <file>file:/C:/Development/php-berry/berry/encryption/AES256Encryption.php</file>
+            <file>file:/C:/Development/php-berry/debug.php</file>
+        </group>
     </open-files>
 </project-private>