class-encryption.php

<?php

namespace Lalala\Src;

use \Defuse\Crypto\Crypto;
use \Defuse\Crypto\Key;
use Lalala\Src\Debug\Logging;

/**
 * Wrapper class for encryption.
 *
 * To save a key: run vendor/bin/generate-defuse-key then save it to wp config using WP CLI.
 */
class Encryption {

	/**
	 * The text to encrypt.
	 *
	 * @var string
	 */
	public $text;

	/**
	 * Construct the function.
	 *
	 * @param string $text
	 */
	public function __construct( $text ) {
		$this->text    = $text; // The text to encrypt.
		$this->logging = new Logging(); // Logging.
	}

	/**
	 * Makes the key used in encrypting and decrypting.
	 *
	 * @return object The Key object.
	 */
	private function make_key(){

		if ( ! defined( 'LALALA_ENCRYPT_KEY' ) ) {
			return false;
		}

		return Key::loadFromAsciiSafeString( LALALA_ENCRYPT_KEY );
	}

	/**
	 * Encrypts the text.
	 *
	 * @return string|false The encrypted string or false if something has failed.
	 */
	public function encrypt(){

		try{
			$encrypted = Crypto::encrypt( $this->text, $this->make_key() );
		} catch( \TypeError $e ){
			$this->logging->log( $e );
			return false;
		}

		return $encrypted;
	}

	/**
	 * Decrypts the text.
	 *
	 * @return string|false The encrypted string or false if something has failed.
	 */
	public function decrypt(){

		try{
			$decrypted = Crypto::decrypt( $this->text, $this->make_key() );
		} catch( \TypeError $e ){
			$this->logging->log( $e );
			return false;
		}

		return $decrypted;
	}
}