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 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 *); 76