usr.sbin/ppp/chap.h

   1 /*-
   2  * Copyright (c) 1996 - 2001 Brian Somers <brian@Awfulhak.org>
   3  *          based on work by Toshiharu OHNO <tony-o@iij.ad.jp>
   4  *                           Internet Initiative Japan, Inc (IIJ)
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/usr.sbin/ppp/chap.h,v 1.17.2.4 2002/09/01 02:12:23 brian Exp $
  29  */
  30
  31 struct mbuf;
  32 struct physical;
  33
  34 #define CHAP_CHALLENGE  1
  35 #define CHAP_RESPONSE   2
  36 #define CHAP_SUCCESS    3
  37 #define CHAP_FAILURE    4
  38
  39 struct chap {
  40   struct fdescriptor desc;
  41   struct {
  42     pid_t pid;
  43     int fd;
  44     struct {
  45       char ptr[AUTHLEN * 2 + 3];        /* Allow for \r\n at the end (- NUL) */
  46       int len;
  47     } buf;
  48   } child;
  49   struct authinfo auth;
  50   struct {
  51     u_char local[CHAPCHALLENGELEN + AUTHLEN];   /* I invented this one */
  52     u_char peer[CHAPCHALLENGELEN + AUTHLEN];    /* Peer gave us this one */
  53   } challenge;
  54 #ifndef NODES
  55   unsigned NTRespSent : 1;              /* Our last response */
  56   int peertries;
  57   u_char authresponse[CHAPAUTHRESPONSELEN];     /* CHAP 81 response */
  58 #endif
  59 };
  60
  61 #define descriptor2chap(d) \
  62   ((d)->type == CHAP_DESCRIPTOR ? (struct chap *)(d) : NULL)
  63 #define auth2chap(a) \
  64   ((struct chap *)((char *)a - (uintptr_t)&((struct chap *)0)->auth))
  65
  66 struct MSCHAPv2_resp {          /* rfc2759 */
  67   char PeerChallenge[16];
  68   char Reserved[8];
  69   char NTResponse[24];
  70   char Flags;
  71 };
  72
  73 extern void chap_Init(struct chap *, struct physical *);
  74 extern void chap_ReInit(struct chap *);
  75 extern struct mbuf *chap_Input(struct bundle *, struct link *, struct mbuf *);