118 lines
2.5 KiB
PHP
118 lines
2.5 KiB
PHP
<?php
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/**
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* @package Joomla.Component.Builder
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*
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* @created 4th September, 2022
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* @author Llewellyn van der Merwe <https://dev.vdm.io>
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* @git Joomla Component Builder <https://git.vdm.dev/joomla/Component-Builder>
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* @copyright Copyright (C) 2015 Vast Development Method. All rights reserved.
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* @license GNU General Public License version 2 or later; see LICENSE.txt
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*/
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namespace VDM\Joomla\Componentbuilder\Crypt\Aes;
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use phpseclib3\Crypt\AES as BASEAES;
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use VDM\Joomla\Componentbuilder\Interfaces\Cryptinterface;
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/**
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* Legacy Class for Aes Encryption
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*
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* @since 3.2.0
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*/
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class Legacy implements Cryptinterface
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{
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/**
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* The Aes class
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*
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* @var BASEAES
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* @since 3.2.0
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*/
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protected BASEAES $aes;
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/**
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* The block size
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*
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* @var int
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* @since 3.2.0
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*/
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protected int $size = 128;
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/**
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* Constructor
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*
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* @param BASEAES $aes The Aes class
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*
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* @since 3.2.0
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*/
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public function __construct(BASEAES $aes)
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{
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$this->aes = $aes;
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// we set the length once
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$this->aes->setKeyLength($this->size);
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// enable padding
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$this->aes->enablePadding();
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}
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/**
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* Encrypt a string as needed
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*
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* @param string $string The string to encrypt
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* @param string $key The encryption key
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*
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* @return string
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* @since 3.2.0
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**/
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public function encrypt(string $string, string $key): string
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{
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// we get the IV length
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$iv_length = (int) $this->aes->getBlockLength() >> 3;
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// get the IV value
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$iv = str_repeat("\0", $iv_length);
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// Load the IV
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$this->aes->setIV($iv);
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// set the password
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$this->aes->setPassword($key, 'pbkdf2', 'sha256', 'VastDevelopmentMethod/salt');
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// encrypt the string, and base 64 encode the result
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return base64_encode($this->aes->encrypt($string));
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}
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/**
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* Decrypt a string as needed
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*
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* @param string $string The string to decrypt
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* @param string $key The decryption key
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*
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* @return string
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* @since 3.2.0
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**/
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public function decrypt(string $string, string $key): string
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{
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// remove base 64 encoding
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$string = base64_decode($string);
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// we get the IV length
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$iv_length = (int) $this->aes->getBlockLength() >> 3;
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// get the IV value
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$iv = str_repeat("\0", $iv_length);
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// Load the IV
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$this->aes->setIV($iv);
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// set the password
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$this->aes->setPassword($key, 'pbkdf2', 'sha256', 'VastDevelopmentMethod/salt');
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return $this->aes->decrypt($string);
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}
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}
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