securecomm.h

// -*- C++ -*-
/*
    $Id: securecomm_8h-source.html,v 1.1 2004/10/05 21:12:03 mentat Exp $

    GNU Messenger - The secure instant messenger

    Copyright (C) 1999-2002  Henrik Abelsson <henrik@abelsson.com>

    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 GM_SECURECOMM_H
#define GM_SECURECOMM_H

namespace GNUMessenger {

class CryptoSession
{
public:
    CryptoSession();
    virtual ~CryptoSession();
    enum Status { None,Negotiation1,Reply1,Negoatiation2,Reply2,Connected};

    //  virtual string requestCertificate();
    /* alice sends bob her certificate and a msg with a session key */
    string authenticate();
    // string encryptMsg(const string &msg);

    //  void parseRequest(const string &request);

    void setPeer(const Certificate & peer) { this->peer = peer;};
    void setPrivkey(const string &key) { this->privKey = key; };
    void setCert(const Certificate& mycert) { this->mycert = mycert;};
    // private:
    /* bob parses alices certificate and her packet */
    void parseAuthenticateReply(const string &msg);
    /* bob makes a reply to alice */
    string authenticate2();
    /* alice parses bobs reply */
    void parseAuthenticate2Reply(const string &msg);
    /* and sends another packet */
    string authenticate3();
    /* which bob parses */
    void parseAuthenticate3Reply(const string &msg);
    //private:
    enum {
        IDENTITY,
        SESSIONKEY,
        RANDOMDATA,
        RANDOMDATA2,
        SESSIONKEY2,

        CERTIFICATE,
        MSG,
        SIGNATURE,
    };

    byte random[16];
    byte random2[16];

    string privKey;
    byte *sessionKey;
    int sessionKeyLen;
    byte *sessionKey2;
    int sessionKey2Len;
    byte *finalKey;
    int finalKeyLen;
    Status status;
    Certificate peer,mycert;
};

} 

#endif 

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