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/*
Copyright (C) 1996-2025 Free Software Foundation, Inc.
This file is part of GNU Inetutils.
GNU Inetutils 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 3 of the License, or (at
your option) any later version.
GNU Inetutils 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, see `http://www.gnu.org/licenses/'. */
/*
* 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. 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.
*/
/*
* 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
/* Cope with variants of <arpa/telnet.h>. */
# if !defined ENCTYPE_ANY && defined TELOPT_ENCTYPE_NULL
# define ENCTYPE_ANY TELOPT_ENCTYPE_NULL
# endif
# if !defined ENCTYPE_DES_CFB64 && defined TELOPT_ENCTYPE_DES_CFB64
# define ENCTYPE_DES_CFB64 TELOPT_ENCTYPE_DES_CFB64
# endif
# if !defined ENCTYPE_DES_OFB64 && defined TELOPT_ENCTYPE_DES_OFB64
# define ENCTYPE_DES_OFB64 TELOPT_ENCTYPE_DES_OFB64
# endif
# if !defined ENCTYPE_CNT && defined TELOPT_ENCTYPE_CNT
# define ENCTYPE_CNT TELOPT_ENCTYPE_CNT
# endif
/*
* Our capabilities are restricted to the encryption types
* DES_CFB64 and DES_OFB64. The latter type is sometimes
* missing in <arpa/telnet.h>. On the other hand, the same
* header file may indicate more encryption types than are
* supported by the present code.
*/
# ifndef ENCTYPE_DES_OFB64
# define ENCTYPE_DES_OFB64 2 /* RFC 2953 */
# endif
# undef ENCTYPE_CNT
# define ENCTYPE_CNT 3 /* Up to DES_OFB64. */
# undef ENCTYPE_NAME_OK
# define ENCTYPE_NAME_OK(x) ((unsigned int)(x) < ENCTYPE_CNT)
typedef unsigned char Block[8];
typedef unsigned char *BlockT;
# ifndef HAVE_ARPA_TELNET_H_SCHEDULE
typedef struct
{
Block _;
} Schedule[16];
# endif
/* !HAVE_ARPA_TELNET_H_SCHEDULE */
# ifndef VALIDKEY
# define VALIDKEY(key) ( key[0] | key[1] | key[2] | key[3] | \
key[4] | key[5] | key[6] | key[7])
# endif
# define SAMEKEY(k1, k2) (!memcmp ((void *) k1, (void *) k2, sizeof (Block)))
# ifndef HAVE_ARPA_TELNET_H_SESSION_KEY
typedef struct
{
short type;
int length;
const unsigned char *data;
} Session_Key;
# endif
/* !HAVE_ARPA_TELNET_H_SESSION_KEY */
typedef struct
{
char *name;
int type;
void (*output) (unsigned char *, int);
int (*input) (int);
void (*init) (int);
int (*start) (int, int);
int (*is) (unsigned char *, int);
int (*reply) (unsigned char *, int);
void (*session) (Session_Key *, int);
int (*keyid) (int, unsigned char *, int *);
void (*printsub) (unsigned char *, int, char *, int);
} Encryptions;
# define SK_DES 1
/* Matched Kerberos v5 KEYTYPE_DES */
# define SK_OTHER 2 /* Non-DES key. */
# include "enc-proto.h"
extern int encrypt_debug_mode;
extern int (*decrypt_input) (int);
extern void (*encrypt_output) (unsigned char *, int);
# endif/* __ENCRYPTION__ */
#endif /* ENCRYPTION */
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