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/*
* Copyright (c) mjh-EDV Beratung, 1996-1999
* mjh-EDV Beratung - 63263 Neu-Isenburg - Rosenstrasse 12
* Tel +49 6102 328279 - Fax +49 6102 328278
* Email info@mjh.teddy-net.com
*
* Author: Jordan Hrycaj <jordan@mjh.teddy-net.com>
*
* $Id: peks-handshake.h,v 1.4 2000/08/14 21:18:05 jordan Exp $
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* PEKS - private exponent key stuff for Diffie Hellman and El Gamal
*/
#ifndef __PEKS_HANDSHAKE_H__
#define __PEKS_HANDSHAKE_H__
/* number of bytes sent as a challenge for pub key authentication */
#ifndef AUTH_CHALLENGE_LEN
#define AUTH_CHALLENGE_LEN 30
#endif
/* El Gamal public key encryption */
extern char *make_public_elg_key_str (peks_key*);
extern peks_key *accept_public_elg_key_str (const char *in);
extern char *make_elg_response_key_str
(peks_key*, const char *buf, unsigned len, const char *text);
extern char *accept_response_key_str
(char **text, unsigned *Len, peks_key*, const char *in);
/* El Gamal authentication */
extern char *make_challenge_str (peks_key *);
extern int accept_challenge_str (peks_key*, const char *in);
extern char *sign_challenge_str (int type, const char *usr, peks_key*);
extern char *accept_signed_challenge_str (peks_key*, const char *line);
/* hashed password authentication */
extern char *make_digest_challenge_str
(peks_key*, const char *tag, const char *usr, const char *pwd);
extern int accept_digest_challenge_str
(const peks_key*, const char *challg, const char*pwd, const char*in);
/* Diffie Hellman key exchange */
extern char *make_public_dh_key_str (peks_key *);
extern peks_key *accept_public_dh_key_str (const char *in);
extern char * make_dh_response_key_str (peks_key *);
extern char * accept_dh_response_str (const peks_key*, const char *line);
/* Misc */
extern int peks_recv (unsigned, char *, unsigned, unsigned);
extern int peks_pwd_recv (unsigned, char *, unsigned, unsigned);
extern int update_cbc_session_keys
(char *buf, int soc,
const char *text, const char*, unsigned, const char*, unsigned) ;
#ifndef XPUB
#define XPUB /* extract public interface */
#endif
XPUB
XPUB /* peks-handshake.h: prevent client/server handshake from blocking */
XPUB extern int peks_recv_timeout ; /* default is 20 secs */
XPUB
XPUB /* the time we wait for a password input, default is 90 secs */
XPUB extern int peks_recv_passwd_timeout ;
XPUB
#endif /* __PEKS_HANDSHAKE_H__ */
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