pppd/chap_ms.h

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