include/wvdiffiehellman.h

/* -*- Mode: C++ -*-
 * Worldvisions Weaver Software:
 * Copyright (C) 2003 Net Integration Technologies, Inc.
 *
 * Diffie-Hellman shared secret creation.
 */
 
#ifndef __WVDIFFIEHELLMAN_H
#define __WVDIFFIEHELLMAN_H
 
#include <openssl/dh.h>
 
#include "wvstream.h"
#include "wvlog.h"
 
class WvDiffieHellman
{
public:
    WvDiffieHellman(const unsigned char *_key, int _keylen, 
                    BN_ULONG _generator);
    ~WvDiffieHellman() { DH_free(info); }
 
    void get_created_secret(WvBuf &outbuf, size_t len);
    int get_public_value(WvBuf &outbuf, int len);
 
    int pub_key_len();
    bool create_secret(WvBuf &inbuf, size_t in_len, WvBuf& outbuf);
 
protected:
    DH *info;
    BN_ULONG generator;
 
private:
 
    WvLog log;
};
 
#endif /* __WVDIFFIEHELLMAN_H */