1/*	$NetBSD: chap_ms.h,v 1.1.1.1 2005/02/20 10:28:42 cube Exp $	*/
2
3/*
4 * chap_ms.h - Challenge Handshake Authentication Protocol definitions.
5 *
6 * Copyright (c) 1995 Eric Rosenquist.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in
17 *    the documentation and/or other materials provided with the
18 *    distribution.
19 *
20 * 3. The name(s) of the authors of this software must not be used to
21 *    endorse or promote products derived from this software without
22 *    prior written permission.
23 *
24 * THE AUTHORS OF THIS SOFTWARE DISCLAIM ALL WARRANTIES WITH REGARD TO
25 * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
26 * AND FITNESS, IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
27 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
28 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
29 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
30 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
31 *
32 * Id: chap_ms.h,v 1.13 2004/11/15 22:13:26 paulus Exp
33 */
34
35#ifndef __CHAPMS_INCLUDE__
36
37#define MD4_SIGNATURE_SIZE	16	/* 16 bytes in a MD4 message digest */
38#define MAX_NT_PASSWORD		256	/* Max (Unicode) chars in an NT pass */
39
40#define MS_CHAP_RESPONSE_LEN	49	/* Response length for MS-CHAP */
41#define MS_CHAP2_RESPONSE_LEN	49	/* Response length for MS-CHAPv2 */
42#define MS_AUTH_RESPONSE_LENGTH	40	/* MS-CHAPv2 authenticator response, */
43					/* as ASCII */
44
45/* E=eeeeeeeeee error codes for MS-CHAP failure messages. */
46#define MS_CHAP_ERROR_RESTRICTED_LOGON_HOURS	646
47#define MS_CHAP_ERROR_ACCT_DISABLED		647
48#define MS_CHAP_ERROR_PASSWD_EXPIRED		648
49#define MS_CHAP_ERROR_NO_DIALIN_PERMISSION	649
50#define MS_CHAP_ERROR_AUTHENTICATION_FAILURE	691
51#define MS_CHAP_ERROR_CHANGING_PASSWORD		709
52
53/*
54 * Offsets within the response field for MS-CHAP
55 */
56#define MS_CHAP_LANMANRESP	0
57#define MS_CHAP_LANMANRESP_LEN	24
58#define MS_CHAP_NTRESP		24
59#define MS_CHAP_NTRESP_LEN	24
60#define MS_CHAP_USENT		48
61
62/*
63 * Offsets within the response field for MS-CHAP2
64 */
65#define MS_CHAP2_PEER_CHALLENGE	0
66#define MS_CHAP2_PEER_CHAL_LEN	16
67#define MS_CHAP2_RESERVED_LEN	8
68#define MS_CHAP2_NTRESP		24
69#define MS_CHAP2_NTRESP_LEN	24
70#define MS_CHAP2_FLAGS		48
71
72#ifdef MPPE
73#include <net/ppp-comp.h>	/* MPPE_MAX_KEY_LEN */
74extern u_char mppe_send_key[MPPE_MAX_KEY_LEN];
75extern u_char mppe_recv_key[MPPE_MAX_KEY_LEN];
76extern int mppe_keys_set;
77
78/* These values are the RADIUS attribute values--see RFC 2548. */
79#define MPPE_ENC_POL_ENC_ALLOWED 1
80#define MPPE_ENC_POL_ENC_REQUIRED 2
81#define MPPE_ENC_TYPES_RC4_40 2
82#define MPPE_ENC_TYPES_RC4_128 4
83
84/* used by plugins (using above values) */
85extern void set_mppe_enc_types(int, int);
86#endif
87
88/* Are we the authenticator or authenticatee?  For MS-CHAPv2 key derivation. */
89#define MS_CHAP2_AUTHENTICATEE 0
90#define MS_CHAP2_AUTHENTICATOR 1
91
92void ChapMS __P((u_char *, char *, int, u_char *));
93void ChapMS2 __P((u_char *, u_char *, char *, char *, int,
94		  u_char *, u_char[MS_AUTH_RESPONSE_LENGTH+1], int));
95#ifdef MPPE
96void mppe_set_keys __P((u_char *, u_char[MD4_SIGNATURE_SIZE]));
97void mppe_set_keys2(u_char PasswordHashHash[MD4_SIGNATURE_SIZE],
98		    u_char NTResponse[24], int IsServer);
99#endif
100
101void	ChallengeHash __P((u_char[16], u_char *, char *, u_char[8]));
102
103void GenerateAuthenticatorResponse(u_char PasswordHashHash[MD4_SIGNATURE_SIZE],
104			u_char NTResponse[24], u_char PeerChallenge[16],
105			u_char *rchallenge, char *username,
106			u_char authResponse[MS_AUTH_RESPONSE_LENGTH+1]);
107
108void chapms_init(void);
109
110#define __CHAPMS_INCLUDE__
111#endif /* __CHAPMS_INCLUDE__ */
112