//
// X509Certificate.h
//
// $Id: //poco/Main/NetSSL_OpenSSL/include/Poco/Net/X509Certificate.h#11 $
//
// Library: NetSSL_OpenSSL
// Package: SSLCore
// Module:  X509Certificate
//
// Definition of the X509Certificate class.
//
// Copyright (c) 2006-2009, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#ifndef NetSSL_X509Certificate_INCLUDED
#define NetSSL_X509Certificate_INCLUDED


#include "Poco/Net/NetSSL.h"
#include "Poco/Net/Context.h"
#include "Poco/DateTime.h"
#include "Poco/SharedPtr.h"
#include <set>
#include <openssl/ssl.h>


namespace Poco {
namespace Net {


class HostEntry;


class NetSSL_API X509Certificate
	/// This class represents a X509 Certificate.
{
public:
	explicit X509Certificate(std::istream& istr);
		/// Creates the X509Certificate object by reading
		/// a certificate in PEM format from a stream.

	explicit X509Certificate(const std::string& path);
		/// Creates the X509Certificate object by reading
		/// a certificate in PEM format from a file.

	explicit X509Certificate(X509* pCert);
		/// Creates the X509Certificate from an existing
		/// OpenSSL certificate. Ownership is taken of 
		/// the certificate.

	X509Certificate(const X509Certificate& cert);
		/// Creates the certificate by copying another one.

	X509Certificate& operator = (const X509Certificate& cert);
		/// Assigns a certificate.

	void swap(X509Certificate& cert);
		/// Exchanges the certificate with another one.

	~X509Certificate();
		/// Destroys the X509Certificate.

	const std::string& issuerName() const;
		/// Returns the certificate issuer name.
		
	const std::string& subjectName() const;
		/// Returns the certificate subject name.
		
	std::string commonName() const;
		/// Returns the common name stored in the certificate.
		
	const X509* certificate() const;
		/// Returns the underlying OpenSSL certificate.

	long verify(const std::string& hostName) const;
		/// Verifies the validity of the certificate against the host name.

	void extractNames(std::string& commonName, std::set<std::string>& domainNames) const;
		/// Extracts the common name and the alias domain names from the
		/// certificate.
		
	Poco::DateTime validFrom() const;
		/// Returns the date and time the certificate is valid from.
		
	Poco::DateTime expiresOn() const;
		/// Returns the date and time the certificate expires.

protected:
	void init();
	static bool containsWildcards(const std::string& commonName);
	static bool matchByAlias(const std::string& alias, const HostEntry& heData);
	
private:
	enum
	{
		NAME_BUFFER_SIZE = 256
	};
	
	std::string _issuerName;
	std::string _subjectName;
	X509*       _pCert;
};


//
// inlines
//
inline const std::string& X509Certificate::issuerName() const
{
	return _issuerName;
}


inline const std::string& X509Certificate::subjectName() const
{
	return _subjectName;
}


inline const X509* X509Certificate::certificate() const
{
	return _pCert;
}


} } // namespace Poco::Net


#endif // NetSSL_X509Certificate_INCLUDED