first commit

system/library/encryption.php

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+<?php
+/**
+ * @package		OpenCart
+ * @author		Daniel Kerr, Billy Noah
+ * @copyright	Copyright (c) 2005 - 2022, OpenCart, Ltd. (https://www.opencart.com/)
+ * @license		https://opensource.org/licenses/GPL-3.0
+ * @link		https://www.opencart.com
+*/
+namespace Opencart\System\Library;
+/**
+ * Class Encryption
+ */
+class Encryption {
+	/**
+	 * @var string
+	 */
+	private string $cipher = 'aes-256-ctr';
+	/**
+	 * @var string
+	 */
+	private string $digest = 'sha256';
+	
+    /**
+     * Encrypt
+     *
+     * @param	string	$key
+     * @param	string	$value
+     * 
+     * @return	string
+     */	
+	public function encrypt(string $key, string $value): string {
+		$key       = openssl_digest($key, $this->digest, true);
+		$iv_length = openssl_cipher_iv_length($this->cipher);
+		$iv        = openssl_random_pseudo_bytes($iv_length);
+
+		return base64_encode($iv . openssl_encrypt($value, $this->cipher, $key, OPENSSL_RAW_DATA, $iv));
+	}
+	
+    /**
+     * Decrypt
+     *
+     * @param	string	$key
+     * @param	string	$value
+     * 
+     * @return	string
+     */
+	public function decrypt(string $key, string $value): string {
+		$result    = '';
+
+		$key       = openssl_digest($key, $this->digest, true);
+		$iv_length = openssl_cipher_iv_length($this->cipher);
+		$value     = base64_decode($value);
+		$iv        = substr($value, 0, $iv_length);
+		$value     = substr($value, $iv_length);
+
+		if (strlen($iv) == $iv_length) {
+			$result = openssl_decrypt($value, $this->cipher, $key, OPENSSL_RAW_DATA, $iv);
+		}
+
+		return $result;
+	}
+}