xref: /freebsd/contrib/telnet/libtelnet/encrypt.h (revision 81cb6ddccd924049b79907cf7df747a0ecc640dc)

/*-
 * Copyright (c) 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)encrypt.h	8.1 (Berkeley) 6/4/93
 */

/*
 * Copyright (C) 1990 by the Massachusetts Institute of Technology
 *
 * Export of this software from the United States of America is assumed
 * to require a specific license from the United States Government.
 * It is the responsibility of any person or organization contemplating
 * export to obtain such a license before exporting.
 *
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of M.I.T. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 */

#ifdef	ENCRYPTION
# ifndef __ENCRYPTION__
# define __ENCRYPTION__

#define	DIR_DECRYPT		1
#define	DIR_ENCRYPT		2

typedef	unsigned char Block[8];
typedef unsigned char *BlockT;
typedef struct { Block _; } Schedule[16];

#define	VALIDKEY(key)	( key[0] | key[1] | key[2] | key[3] | \
			  key[4] | key[5] | key[6] | key[7])

#define	SAMEKEY(k1, k2)	(!bcmp((void *)k1, (void *)k2, sizeof(Block)))

typedef	struct {
	short		type;
	int		length;
	unsigned char	*data;
} Session_Key;

# if !defined(P)
#  ifdef __STDC__
#   define P(x)	x
#  else
#   define P(x)	()
#  endif
# endif

typedef struct {
	char	*name;
	int	type;
	void	(*output) P((unsigned char *, int));
	int	(*input) P((int));
	void	(*init) P((int));
	int	(*start) P((int, int));
	int	(*is) P((unsigned char *, int));
	int	(*reply) P((unsigned char *, int));
	void	(*session) P((Session_Key *, int));
	int	(*keyid) P((int, unsigned char *, int *));
	void	(*printsub) P((unsigned char *, int, unsigned char *, int));
} Encryptions;

#define	SK_DES		1	/* Matched Kerberos v5 KEYTYPE_DES */

#include "enc-proto.h"

extern int encrypt_debug_mode;
extern int (*decrypt_input) P((int));
extern void (*encrypt_output) P((unsigned char *, int));
# endif /* __ENCRYPTION__ */
#endif /* ENCRYPTION */