<?php

	class App_Service_RsaCryptor
	{
		const RSA_PATH = APPLICATION_PATH . '/../rsa/';
		const PASS_PHRASE = 'bX3rQ5vCr8CChT';

		const RSA_OBJECT_REGISTRY_NAME = 'RSA_OBJECT';

		protected $_cryptor;

        const RSA_KEY_OPTIONS = array(
            'pemPath' => self::RSA_PATH."private_key.pem",
            'certificatePath' => self::RSA_PATH. 'public_key.pub',
            'passPhrase' => self::PASS_PHRASE,
            'hashAlgorithm' => OPENSSL_ALGO_SHA1
        );

		public function __construct()
		{

		    if(Zend_Registry::isRegistered(self::RSA_OBJECT_REGISTRY_NAME)){
		        $this->_cryptor = Zend_Registry::get(self::RSA_OBJECT_REGISTRY_NAME);
            }else{
                $this->_cryptor = new Zend_Crypt_Rsa(self::RSA_KEY_OPTIONS);
                Zend_Registry::set(self::RSA_OBJECT_REGISTRY_NAME, $this->_cryptor);
            }

		}

		public function getPrivateKey(){
            return new Zend_Crypt_Rsa_Key_Private($this->_cryptor->getPemString(), self::RSA_KEY_OPTIONS['passPhrase']);
        }

        public function getPublicKey(){
            return new Zend_Crypt_Rsa_Key_Public($this->_cryptor->getCertificateString(), self::RSA_KEY_OPTIONS['passPhrase']);
        }

		public function cripta($data){
            return $this->_cryptor->encrypt($data, $this->getPrivateKey(), 'base64');
        }

        public function decripta($data){
            return $this->_cryptor->decrypt($data, $this->getPublicKey(), 'base64');
        }

	}