xref: /freebsd/usr.sbin/ppp/chap.h (revision ba3c1f5972d7b90feb6e6da47905ff2757e0fe57)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
5  *          based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
6  *                           Internet Initiative Japan, Inc (IIJ)
7  * All rights reserved.
8  *
9  * Redistribution and use in source and binary forms, with or without
10  * modification, are permitted provided that the following conditions
11  * are met:
12  * 1. Redistributions of source code must retain the above copyright
13  *    notice, this list of conditions and the following disclaimer.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28  * SUCH DAMAGE.
29  *
30  * $FreeBSD$
31  */
32 
33 struct mbuf;
34 struct physical;
35 
36 #define	CHAP_CHALLENGE	1
37 #define	CHAP_RESPONSE	2
38 #define	CHAP_SUCCESS	3
39 #define	CHAP_FAILURE	4
40 
41 struct chap {
42   struct fdescriptor desc;
43   struct {
44     pid_t pid;
45     int fd;
46     struct {
47       char ptr[AUTHLEN * 2 + 3];	/* Allow for \r\n at the end (- NUL) */
48       int len;
49     } buf;
50   } child;
51   struct authinfo auth;
52   struct {
53     u_char local[CHAPCHALLENGELEN + AUTHLEN];	/* I invented this one */
54     u_char peer[CHAPCHALLENGELEN + AUTHLEN];	/* Peer gave us this one */
55   } challenge;
56 #ifndef NODES
57   unsigned NTRespSent : 1;		/* Our last response */
58   int peertries;
59   u_char authresponse[CHAPAUTHRESPONSELEN];	/* CHAP 81 response */
60 #endif
61 };
62 
63 #define descriptor2chap(d) \
64   ((d)->type == CHAP_DESCRIPTOR ? (struct chap *)(d) : NULL)
65 #define auth2chap(a) \
66   ((struct chap *)((char *)a - (uintptr_t)&((struct chap *)0)->auth))
67 
68 struct MSCHAPv2_resp {		/* rfc2759 */
69   char PeerChallenge[16];
70   char Reserved[8];
71   char NTResponse[24];
72   char Flags;
73 };
74 
75 extern void chap_Init(struct chap *, struct physical *);
76 extern void chap_ReInit(struct chap *);
77 extern struct mbuf *chap_Input(struct bundle *, struct link *, struct mbuf *);
78