egroupware_official/api/src/Mail/Smime.php

<?php
/**
 * EGroupware Api: generic base class for SMIME
 *
 * @link http://www.egroupware.org
 * @package api
 * @subpackage mail
 * @author Hadi Nategh <hn@egrupware.org>
 * @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License Version 2+
 * @version $Id$
 */

namespace EGroupware\Api\Mail;

use EGroupware\Api;
use Horde_Crypt_Smime;

/**
 * EMailAdmin generic base class for SMTP
 */
class Smime extends Horde_Crypt_Smime
{

	static $SMIME_TYPES = array (
		'application/pkcs8',
		'application/pkcs7',
		'application/pkcs10',
		'application/pkcs8',
		'multipart/signed',
		'application/x-pkcs7-signature',
		'application/x-pkcs7-mime',
		'application/pkcs7-mime',
		'application/pkcs7-signature',
	);
	/**
     * Constructor.
     *
     * @param Horde_Crypt_Smime $smime  S/MIME object.
     */
    public function __construct($params = array())
    {
		parent::__construct($params);
    }

	/**
	 * Check if a given mime type is smime type
	 *
	 * @param string $_mime mime type
	 *
	 * @return boolean returns TRUE if the given mime is smime
	 */
	public static function isSmime ($_mime)
	{
		return in_array($_mime, self::$SMIME_TYPES);
	}

	/**
	 * Check if the openssl is supported
	 *
	 * @return boolean returns True if openssl is supported
	 */
	public function enabled ()
	{
		try
		{
			$this->checkForOpenSSL();
		} catch (Exception $ex) {
			return false;
		}
		return true;
	}

	/**
	 * Extract public key from certificate
	 *
	 * @param type $cert
	 * @return string returns public key
	 */
	public function get_publickey ($cert)
	{
		$handle = openssl_get_publickey($cert);
		$keyData = openssl_pkey_get_details($handle);
		return $keyData['key'];
	}
}