114 lines
2.1 KiB
PHP
114 lines
2.1 KiB
PHP
<?php
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/**
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* @brief Encrypt Text
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* @author <a href='https://www.invisioncommunity.com'>Invision Power Services, Inc.</a>
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* @copyright (c) Invision Power Services, Inc.
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* @license https://www.invisioncommunity.com/legal/standards/
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* @package Invision Community
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* @since 17 Apr 2014
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*/
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namespace IPS\Text;
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/* To prevent PHP errors (extending class does not exist) revealing path */
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if ( !defined( '\IPS\SUITE_UNIQUE_KEY' ) )
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{
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header( ( isset( $_SERVER['SERVER_PROTOCOL'] ) ? $_SERVER['SERVER_PROTOCOL'] : 'HTTP/1.0' ) . ' 403 Forbidden' );
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exit;
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}
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/**
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* Encrypted
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*/
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class _Encrypt
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{
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/**
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* Get Key
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*
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* @return void
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*/
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public static function key()
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{
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return \IPS\TEXT_ENCRYPTION_KEY ?: md5( \IPS\Settings::i()->sql_pass . \IPS\Settings::i()->sql_database );
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}
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/**
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* @brief Cipher
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*/
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public $cipher;
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/**
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* Constructor
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*
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* @return void
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*/
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public function __construct()
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{
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require_once \IPS\ROOT_PATH . '/system/3rd_party/AES/AES.php';
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}
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/**
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* From plaintext
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*
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* @param string $plaintext Plaintext
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* @return \IPS\Text\Encrypt
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*/
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public static function fromPlaintext( $plaintext )
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{
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$obj = new static;
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$obj->cipher = \AesCtr::encrypt( $plaintext, static::key(), 256 );
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return $obj;
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}
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/**
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* From plaintext
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*
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* @param string $cipher Cipher
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* @return \IPS\Text\Encrypt
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*/
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public static function fromCipher( $cipher )
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{
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$obj = new static;
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$obj->cipher = $cipher;
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return $obj;
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}
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/**
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* From tag
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*
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* @param string $tag Tag
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* @return \IPS\Text\Encrypt
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*/
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public static function fromTag( $tag )
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{
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if ( preg_match( '/^\[\!AES\[(.+?)\]\]/', $tag, $matches ) )
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{
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return static::fromCipher( $matches[1] );
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}
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else
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{
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return static::fromPlaintext( $tag );
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}
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}
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/**
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* Wrap in a tag to use later with fromTag
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* Used for legacy areas which previously stored unencrypted values
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*
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* @return string
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*/
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public function tag()
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{
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return '[!AES[' . $this->cipher . ']]';
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}
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/**
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* Decript
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*
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* @return string
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*/
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public function decrypt()
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{
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return \AesCtr::decrypt( $this->cipher, static::key(), 256 );
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}
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} |