From a8c7186b839f85cda0f1abbbae82b0e34a6a65d4 Mon Sep 17 00:00:00 2001
From: Velz2020 <velmurugan.s@venbainfotech.com>
Date: Fri, 16 Oct 2020 00:12:36 +0530
Subject: [PATCH] CUSTOME ENCRYPT ADDED

---
 .../helpers/custom_encryption_helper.php      | 83 +++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 api/application/helpers/custom_encryption_helper.php

diff --git a/api/application/helpers/custom_encryption_helper.php b/api/application/helpers/custom_encryption_helper.php
new file mode 100644
index 00000000..b1134d6a
--- /dev/null
+++ b/api/application/helpers/custom_encryption_helper.php
@@ -0,0 +1,83 @@
+<?php
+
+/**
+ * JSON Web Token implementation, based on this spec:
+ * http://tools.ietf.org/html/draft-ietf-oauth-json-web-token-06
+ *
+ * PHP version 5
+ *
+ * @category Authentication
+ * @package  Authentication_JWT
+ * @author   Neuman Vong <neuman@twilio.com>
+ * @author   Anant Narayanan <anant@php.net>
+ * @license  http://opensource.org/licenses/BSD-3-Clause 3-clause BSD
+ * @link     https://github.com/firebase/php-jwt
+ */
+class custom_encryption
+{
+	
+
+	// Store cipher method 
+	static private $ciphering = "BF-CBC"; 
+	public static function encode($str)	
+	{
+		$string_to_encrypt = $str;
+		// $string_to_encrypt = 'CJf1ac5a9c47284292d42eadc8f30b75df/20201015';
+		// echo "Original String: " . $string_to_encrypt . "\n"; 
+		// Use OpenSSl encryption method 
+		$iv_length = openssl_cipher_iv_length(SELF::$ciphering); 
+		$options = 0; 
+		// echo '$iv_length-'.$iv_length;
+		// Use random_bytes() function which gives 
+		// randomly 16 digit values 
+		$encryption_iv = random_bytes($iv_length); 
+		// echo '$encryption_iv-'.$encryption_iv;
+
+		// Alternatively, we can use any 16 digit 
+		// characters or numeric for iv 
+		$encryption_key = openssl_digest(php_uname(), 'MD5', TRUE); 
+		// echo '$encryption_key='.$encryption_key;
+
+		// Encryption of string process starts 
+		$encryption = openssl_encrypt($string_to_encrypt, SELF::$ciphering, 
+				$encryption_key, $options, $encryption_iv); 
+
+		// Display the encrypted string 
+		// echo "Encrypted String: " . $encryption . "\n"; 
+		return base64_encode($encryption.'.'.$encryption_iv);
+	}	
+
+
+
+	public static function decode($str)
+	{
+
+		//echo 'Received-'.base64_decode($str);
+		$received_data = explode('.',base64_decode($str));
+
+		$str = $received_data[0];
+		// Use OpenSSl encryption method 
+		$iv_length = openssl_cipher_iv_length(SELF::$ciphering); 
+		$options = 0;
+		// echo '$iv_length-'.$iv_length;
+		// Decryption of string process starts 
+		// Used random_bytes() which gives randomly 
+		// 16 digit values 
+		// $decryption_iv = random_bytes($iv_length);
+		$decryption_iv = $received_data[1];
+		// echo '$decryption_iv-'.$decryption_iv; 
+
+		// Store the decryption key 
+		$decryption_key = openssl_digest(php_uname(), 'MD5', TRUE); 
+		// echo '$encryption_key='.$decryption_key;
+
+		// Descrypt the string 
+		$decryption = openssl_decrypt ($str, SELF::$ciphering, 
+					$decryption_key, $options, $decryption_iv); 
+
+		// Display the decrypted string 
+		// echo "Decrypted String: " . $decryption; 
+		return $decryption; 
+	}
+
+}