usr/src/cmd/cmd-inet/usr.bin/pppd/chap.h

   1 /*
   2  * chap.h - Challenge Handshake Authentication Protocol definitions.
   3  *
   4  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
   5  * Use is subject to license terms.
   6  *
   7  * Copyright (c) 1993 The Australian National University.
   8  * All rights reserved.
   9  *
  10  * Redistribution and use in source and binary forms are permitted
  11  * provided that the above copyright notice and this paragraph are
  12  * duplicated in all such forms and that any documentation,
  13  * advertising materials, and other materials related to such
  14  * distribution and use acknowledge that the software was developed
  15  * by the Australian National University.  The name of the University
  16  * may not be used to endorse or promote products derived from this
  17  * software without specific prior written permission.
  18  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  19  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  20  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  21  *
  22  * Copyright (c) 1991 Gregory M. Christy
  23  * All rights reserved.
  24  *
  25  * Redistribution and use in source and binary forms are permitted
  26  * provided that the above copyright notice and this paragraph are
  27  * duplicated in all such forms and that any documentation,
  28  * advertising materials, and other materials related to such
  29  * distribution and use acknowledge that the software was developed
  30  * by the author.
  31  *
  32  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  33  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  34  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  35  *
  36  * $Id: chap.h,v 1.8 1999/11/15 01:44:41 paulus Exp $
  37  */
  38
  39 #ifndef __CHAP_INCLUDE__
  40 #define __CHAP_INCLUDE__
  41
  42 /* Code + ID + length */
  43 #define CHAP_HEADERLEN          4
  44
  45 #define CHAP_DIGEST_MD5         5       /* use MD5 algorithm */
  46 #define MD5_SIGNATURE_SIZE      16      /* 16 bytes in a MD5 message digest */
  47 #define CHAP_MICROSOFT          0x80    /* use Microsoft-compatible alg. */
  48 #define CHAP_MICROSOFT_V2       0x81    /* use MS-CHAPv2 */
  49
  50 #define CHECK_CHALLENGE_LENGTH  8       /* Minimum acceptable challenge */
  51
  52 /*
  53  * CHAP message code numbers.
  54  */
  55 #define CHAP_CHALLENGE          1
  56 #define CHAP_RESPONSE           2
  57 #define CHAP_SUCCESS            3
  58 #define CHAP_FAILURE            4
  59
  60 /*
  61  *  Challenge lengths (for challenges we send) and other limits.
  62  */
  63 #define MIN_CHALLENGE_LENGTH    16
  64 #define MAX_CHALLENGE_LENGTH    24
  65 #define MAX_RESPONSE_LENGTH     64      /* sufficient for MD5 or MS-CHAP */
  66 /* These are here to remind people of the buffer limits */
  67 #define MS_CHAP_RESPONSE_LEN    49      /* Response length for MS-CHAP */
  68 #define MS_CHAPV2_RESPONSE_LEN  49      /* Response length for MS-CHAPv2 */
  69
  70 /*
  71  * Each interface is described by a chap structure.
  72  */
  73
  74 typedef struct chap_state {
  75     int unit;                   /* Interface unit number */
  76     int clientstate;            /* Client state */
  77     int serverstate;            /* Server state */
  78     char peercname[MAXNAMELEN]; /* unauthenticated peer name in challenge */
  79     u_char challenge[MAX_CHALLENGE_LENGTH]; /* last challenge string sent */
  80     u_char chal_len;            /* challenge length */
  81     u_char chal_id;             /* ID of last challenge */
  82     u_char chal_type;           /* hash algorithm for challenges */
  83     u_char id;                  /* Current id */
  84     char *chal_name;            /* Our name to use with challenge */
  85     int chal_interval;          /* Time until we challenge peer again */
  86     int timeouttime;            /* Timeout time in seconds */
  87     int max_transmits;          /* Maximum # of challenge transmissions */
  88     int chal_transmits;         /* Number of transmissions of challenge */
  89     int resp_transmits;         /* Number of transmissions of response */
  90     u_char response[MAX_RESPONSE_LENGTH];       /* Response to send */
  91     u_char resp_length;         /* length of response */
  92     u_char resp_id;             /* ID for response messages */
  93     u_char resp_type;           /* hash algorithm for responses */
  94     u_char stat_length;         /* Length of status message (MS-CHAP) */
  95     char *resp_name;            /* Our name to send with response */
  96     char *stat_message;         /* per-algorithm status message (MS-CHAP) */
  97     int rename_count;           /* number of peer renames seen */
  98 } chap_state;
  99
 100
 101 /*
 102  * Client (authenticatee) states.
 103  */
 104 #define CHAPCS_INITIAL          0       /* Lower layer down, not opened */
 105 #define CHAPCS_CLOSED           1       /* Lower layer up, not opened */
 106 #define CHAPCS_PENDING          2       /* Auth us to peer when lower up */
 107 #define CHAPCS_LISTEN           3       /* Listening for a challenge */
 108 #define CHAPCS_RESPONSE         4       /* Sent response, waiting for status */
 109 #define CHAPCS_OPEN             5       /* We've received Success */
 110
 111 #define CHAPCS__LIST    \
 112         "Initial", "Closed", "Pending", "Listen", \
 113         "Response", "Open"
 114
 115 /*
 116  * Server (authenticator) states.
 117  */
 118 #define CHAPSS_INITIAL          0       /* Lower layer down, not opened */
 119 #define CHAPSS_CLOSED           1       /* Lower layer up, not opened */
 120 #define CHAPSS_PENDING          2       /* Auth peer when lower up */
 121 #define CHAPSS_INITIAL_CHAL     3       /* We've sent the first challenge */
 122 #define CHAPSS_OPEN             4       /* We've sent a Success msg */
 123 #define CHAPSS_RECHALLENGE      5       /* We've sent another challenge */
 124 #define CHAPSS_BADAUTH          6       /* We've sent a Failure msg */
 125
 126 #define CHAPSS__LIST    \
 127         "Initial", "Closed", "Pending", "InitialChal", \
 128         "Open", "Rechallenge", "BadAuth"
 129
 130 /*
 131  * Timeouts.
 132  */
 133 #define CHAP_DEFTIMEOUT         3       /* Timeout time in seconds */
 134 #define CHAP_DEFTRANSMITS       10      /* max # times to send challenge */
 135
 136 extern chap_state chap[];
 137
 138 void ChapAuthWithPeer __P((int, char *, int));
 139 void ChapAuthPeer __P((int, char *, int));
 140
 141 extern struct protent chap_protent;
 142
 143 #endif /* __CHAP_INCLUDE__ */