+ Changed the approach to an OOP model

lib.php

@@ -1,11 +1,46 @@
 <?php
+
 /**
+ * @author Kato Twofold
+ * @copyright MIT
+ * 
+ * The class has full support for encryption of strings, provides validation for those
+ * and makes sure they can be decrypted on the other end, the key is extremely important
+ * and you MUST keep track of it and not lose it as there is no way of getting it back.
+ * 
+ */
+class kpcrypt {
+
+    // The key to use in the encryption process
+    private $key = null;
+
+    /**
+     * @param string $key [Optional] The key to use for encryption, if none is mentioned a random one will be generated
+     */
+    public function __construct( string $key = null) {
+        // If no key is mentioned, generate one
+        if ( empty($key) ) {
+            $key = bin2hex(openssl_random_pseudo_bytes("64"));
+        }
+    }
+
+    /**
+     * Get the key that the instance is currently using, really useful for when you randomly generate it!
+     * @return string The key of the instance
+     */
+    public function getKey() {
+        return $this->key;
+    }
+
+    /**
      * @param string $data The data to be encrypted, this can only encrypt strings.
      * @param string $key The key to use to encrypt the data, this key should be generated using the openssl_random_pseudo_bytes
      * @param string $cipherMethod The cypher method to use in the encryption process, these can be checked using 
      * @param bool $integrity_check Check if the encrypted data can also be decypted, this will take 2x more time to process the data, but will make 100% sure that the data is safe and can be decrypted.
      */
-function encryptData( string $data, string $key, string $cipherMethod = 'AES-256-CBC', bool $integrity_check = TRUE) {
+    function encryptData(string $data, string $key, string $cipherMethod = 'AES-256-CBC', bool $integrity_check = TRUE) {
+        // Grab the key from self-reference
+        $key = $this->key;
 
         // Lowercase the cipher
         $cipherMethod = strtolower($cipherMethod);
@@ -29,9 +64,9 @@ function encryptData( string $data, string $key, string $cipherMethod = 'AES-256
         $encryptedData = base64_encode($encryptedData);
 
         // Check if we should verify the integrity of the encryption
-    if ( $integrity_check === TRUE ) {
+        if ($integrity_check === TRUE) {
             // Test for decryption validity
-        if ( md5(decryptData($encryptedData, $key, $cipherMethod)) === md5($data) ) {
+            if (md5($this->decryptData($encryptedData, $key, $cipherMethod)) === md5($data)) {
                 // Put the output in the result
                 return $encryptedData;
             } else {
@@ -42,15 +77,16 @@ function encryptData( string $data, string $key, string $cipherMethod = 'AES-256
             // Simply return the results
             return $encryptedData;
         }
+    }
 
-}
-
-/**
+    /**
      * @param string $data The data to be encrypted, this can only encrypt strings.
      * @param string $key The key to use to encrypt the data, this key should be generated using the openssl_random_pseudo_bytes
      * @param string $cipherMethod The cypher method to use in the encryption process, these can be checked using 
      */
-function decryptData( string $data, string $key, string $cipherMethod = 'AES-256-CBC' ) {
+    function decryptData(string $data, string $cipherMethod = 'AES-256-CBC') {
+        // Grab the key from self-reference
+        $key = $this->key;
 
         // Lowercase the cipher
         $cipherMethod = strtolower($cipherMethod);
@@ -67,14 +103,17 @@ function decryptData( string $data, string $key, string $cipherMethod = 'AES-256
         // Get the length of the IV
         $iv_length = openssl_cipher_iv_length($cipherMethod);
         // Get the IV from the decoded data
-    $iv = substr($data,0,$iv_length);
+        $iv = substr($data, 0, $iv_length);
 
         // Get the encrypted string from the data
         $data = substr($data, $iv_length);
 
         // Decrypt the data
-    $data = openssl_decrypt($data,$cipherMethod,$key, OPENSSL_RAW_DATA, $iv);
+        $data = openssl_decrypt($data, $cipherMethod, $key, OPENSSL_RAW_DATA, $iv);
 
         // Return the data
         return $data;
+    }
 }
+
+