//
// ZoneMinder RTSP Authentication Class Interface, $Date$, $Revision$
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
// 

#ifndef ZM_RTSP_AUTH_H
#define ZM_RTSP_AUTH_H

#if HAVE_GNUTLS_OPENSSL_H
#include <gnutls/openssl.h>
#endif
#if HAVE_GNUTLS_GNUTLS_H
#include <gnutls/gnutls.h>
#endif

#if HAVE_GCRYPT_H
#include <gcrypt.h>
#elif HAVE_LIBCRYPTO
#include <openssl/md5.h>
#endif // HAVE_GCRYPT_H || HAVE_LIBCRYPTO

enum AuthMethod { AUTH_UNDEFINED = 0, AUTH_BASIC = 1, AUTH_DIGEST = 2 };
class Authenticator {
public:
    Authenticator(std::string &username, std::string password);
    virtual ~Authenticator();
    void reset();

    std::string realm() { return fRealm; }
    std::string nonce() { return fNonce; }
    std::string username() { return fUsername; }
	AuthMethod	auth_method() const { return fAuthMethod; } 
    
    std::string computeDigestResponse( std::string &cmd, std::string &url );
    void authHandleHeader( std::string headerData );
    std::string getAuthHeader( std::string method, std::string path );
	void checkAuthResponse(std::string &response);
    
private:
  std::string password() { return fPassword; }
  AuthMethod fAuthMethod;
  std::string fRealm; 
  std::string fNonce;
  std::string fCnonce;
  std::string fQop;
  std::string fUsername; 
  std::string fPassword;
  std::string quote( std::string src );
	int nc;
};

#endif // ZM_RTSP_AUTH_H