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lwip/netif/ppp/chap.h@0:b2805b6888dc, 2016-06-20 (annotated)

Committer:
robert_jw
Date:
Mon Jun 20 01:40:20 2016 +0000
Revision:
0:b2805b6888dc
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robert_jw 0:b2805b6888dc 1 /*****************************************************************************
robert_jw 0:b2805b6888dc 2 * chap.h - Network Challenge Handshake Authentication Protocol header file.
robert_jw 0:b2805b6888dc 3 *
robert_jw 0:b2805b6888dc 4 * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc.
robert_jw 0:b2805b6888dc 5 * portions Copyright (c) 1998 Global Election Systems Inc.
robert_jw 0:b2805b6888dc 6 *
robert_jw 0:b2805b6888dc 7 * The authors hereby grant permission to use, copy, modify, distribute,
robert_jw 0:b2805b6888dc 8 * and license this software and its documentation for any purpose, provided
robert_jw 0:b2805b6888dc 9 * that existing copyright notices are retained in all copies and that this
robert_jw 0:b2805b6888dc 10 * notice and the following disclaimer are included verbatim in any
robert_jw 0:b2805b6888dc 11 * distributions. No written agreement, license, or royalty fee is required
robert_jw 0:b2805b6888dc 12 * for any of the authorized uses.
robert_jw 0:b2805b6888dc 13 *
robert_jw 0:b2805b6888dc 14 * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR
robert_jw 0:b2805b6888dc 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
robert_jw 0:b2805b6888dc 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
robert_jw 0:b2805b6888dc 17 * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
robert_jw 0:b2805b6888dc 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
robert_jw 0:b2805b6888dc 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
robert_jw 0:b2805b6888dc 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
robert_jw 0:b2805b6888dc 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
robert_jw 0:b2805b6888dc 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
robert_jw 0:b2805b6888dc 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
robert_jw 0:b2805b6888dc 24 *
robert_jw 0:b2805b6888dc 25 ******************************************************************************
robert_jw 0:b2805b6888dc 26 * REVISION HISTORY
robert_jw 0:b2805b6888dc 27 *
robert_jw 0:b2805b6888dc 28 * 03-01-01 Marc Boucher <marc@mbsi.ca>
robert_jw 0:b2805b6888dc 29 * Ported to lwIP.
robert_jw 0:b2805b6888dc 30 * 97-12-03 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc.
robert_jw 0:b2805b6888dc 31 * Original built from BSD network code.
robert_jw 0:b2805b6888dc 32 ******************************************************************************/
robert_jw 0:b2805b6888dc 33 /*
robert_jw 0:b2805b6888dc 34 * chap.h - Challenge Handshake Authentication Protocol definitions.
robert_jw 0:b2805b6888dc 35 *
robert_jw 0:b2805b6888dc 36 * Copyright (c) 1993 The Australian National University.
robert_jw 0:b2805b6888dc 37 * All rights reserved.
robert_jw 0:b2805b6888dc 38 *
robert_jw 0:b2805b6888dc 39 * Redistribution and use in source and binary forms are permitted
robert_jw 0:b2805b6888dc 40 * provided that the above copyright notice and this paragraph are
robert_jw 0:b2805b6888dc 41 * duplicated in all such forms and that any documentation,
robert_jw 0:b2805b6888dc 42 * advertising materials, and other materials related to such
robert_jw 0:b2805b6888dc 43 * distribution and use acknowledge that the software was developed
robert_jw 0:b2805b6888dc 44 * by the Australian National University. The name of the University
robert_jw 0:b2805b6888dc 45 * may not be used to endorse or promote products derived from this
robert_jw 0:b2805b6888dc 46 * software without specific prior written permission.
robert_jw 0:b2805b6888dc 47 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
robert_jw 0:b2805b6888dc 48 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
robert_jw 0:b2805b6888dc 49 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
robert_jw 0:b2805b6888dc 50 *
robert_jw 0:b2805b6888dc 51 * Copyright (c) 1991 Gregory M. Christy
robert_jw 0:b2805b6888dc 52 * All rights reserved.
robert_jw 0:b2805b6888dc 53 *
robert_jw 0:b2805b6888dc 54 * Redistribution and use in source and binary forms are permitted
robert_jw 0:b2805b6888dc 55 * provided that the above copyright notice and this paragraph are
robert_jw 0:b2805b6888dc 56 * duplicated in all such forms and that any documentation,
robert_jw 0:b2805b6888dc 57 * advertising materials, and other materials related to such
robert_jw 0:b2805b6888dc 58 * distribution and use acknowledge that the software was developed
robert_jw 0:b2805b6888dc 59 * by the author.
robert_jw 0:b2805b6888dc 60 *
robert_jw 0:b2805b6888dc 61 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
robert_jw 0:b2805b6888dc 62 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
robert_jw 0:b2805b6888dc 63 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
robert_jw 0:b2805b6888dc 64 *
robert_jw 0:b2805b6888dc 65 * $Id: chap.h,v 1.6 2010/01/24 13:19:34 goldsimon Exp $
robert_jw 0:b2805b6888dc 66 */
robert_jw 0:b2805b6888dc 67
robert_jw 0:b2805b6888dc 68 #ifndef CHAP_H
robert_jw 0:b2805b6888dc 69 #define CHAP_H
robert_jw 0:b2805b6888dc 70
robert_jw 0:b2805b6888dc 71 /* Code + ID + length */
robert_jw 0:b2805b6888dc 72 #define CHAP_HEADERLEN 4
robert_jw 0:b2805b6888dc 73
robert_jw 0:b2805b6888dc 74 /*
robert_jw 0:b2805b6888dc 75 * CHAP codes.
robert_jw 0:b2805b6888dc 76 */
robert_jw 0:b2805b6888dc 77
robert_jw 0:b2805b6888dc 78 #define CHAP_DIGEST_MD5 5 /* use MD5 algorithm */
robert_jw 0:b2805b6888dc 79 #define MD5_SIGNATURE_SIZE 16 /* 16 bytes in a MD5 message digest */
robert_jw 0:b2805b6888dc 80 #define CHAP_MICROSOFT 0x80 /* use Microsoft-compatible alg. */
robert_jw 0:b2805b6888dc 81 #define MS_CHAP_RESPONSE_LEN 49 /* Response length for MS-CHAP */
robert_jw 0:b2805b6888dc 82
robert_jw 0:b2805b6888dc 83 #define CHAP_CHALLENGE 1
robert_jw 0:b2805b6888dc 84 #define CHAP_RESPONSE 2
robert_jw 0:b2805b6888dc 85 #define CHAP_SUCCESS 3
robert_jw 0:b2805b6888dc 86 #define CHAP_FAILURE 4
robert_jw 0:b2805b6888dc 87
robert_jw 0:b2805b6888dc 88 /*
robert_jw 0:b2805b6888dc 89 * Challenge lengths (for challenges we send) and other limits.
robert_jw 0:b2805b6888dc 90 */
robert_jw 0:b2805b6888dc 91 #define MIN_CHALLENGE_LENGTH 32
robert_jw 0:b2805b6888dc 92 #define MAX_CHALLENGE_LENGTH 64
robert_jw 0:b2805b6888dc 93 #define MAX_RESPONSE_LENGTH 64 /* sufficient for MD5 or MS-CHAP */
robert_jw 0:b2805b6888dc 94
robert_jw 0:b2805b6888dc 95 /*
robert_jw 0:b2805b6888dc 96 * Each interface is described by a chap structure.
robert_jw 0:b2805b6888dc 97 */
robert_jw 0:b2805b6888dc 98
robert_jw 0:b2805b6888dc 99 typedef struct chap_state {
robert_jw 0:b2805b6888dc 100 int unit; /* Interface unit number */
robert_jw 0:b2805b6888dc 101 int clientstate; /* Client state */
robert_jw 0:b2805b6888dc 102 int serverstate; /* Server state */
robert_jw 0:b2805b6888dc 103 u_char challenge[MAX_CHALLENGE_LENGTH]; /* last challenge string sent */
robert_jw 0:b2805b6888dc 104 u_char chal_len; /* challenge length */
robert_jw 0:b2805b6888dc 105 u_char chal_id; /* ID of last challenge */
robert_jw 0:b2805b6888dc 106 u_char chal_type; /* hash algorithm for challenges */
robert_jw 0:b2805b6888dc 107 u_char id; /* Current id */
robert_jw 0:b2805b6888dc 108 char *chal_name; /* Our name to use with challenge */
robert_jw 0:b2805b6888dc 109 int chal_interval; /* Time until we challenge peer again */
robert_jw 0:b2805b6888dc 110 int timeouttime; /* Timeout time in seconds */
robert_jw 0:b2805b6888dc 111 int max_transmits; /* Maximum # of challenge transmissions */
robert_jw 0:b2805b6888dc 112 int chal_transmits; /* Number of transmissions of challenge */
robert_jw 0:b2805b6888dc 113 int resp_transmits; /* Number of transmissions of response */
robert_jw 0:b2805b6888dc 114 u_char response[MAX_RESPONSE_LENGTH]; /* Response to send */
robert_jw 0:b2805b6888dc 115 u_char resp_length; /* length of response */
robert_jw 0:b2805b6888dc 116 u_char resp_id; /* ID for response messages */
robert_jw 0:b2805b6888dc 117 u_char resp_type; /* hash algorithm for responses */
robert_jw 0:b2805b6888dc 118 char *resp_name; /* Our name to send with response */
robert_jw 0:b2805b6888dc 119 } chap_state;
robert_jw 0:b2805b6888dc 120
robert_jw 0:b2805b6888dc 121
robert_jw 0:b2805b6888dc 122 /*
robert_jw 0:b2805b6888dc 123 * Client (peer) states.
robert_jw 0:b2805b6888dc 124 */
robert_jw 0:b2805b6888dc 125 #define CHAPCS_INITIAL 0 /* Lower layer down, not opened */
robert_jw 0:b2805b6888dc 126 #define CHAPCS_CLOSED 1 /* Lower layer up, not opened */
robert_jw 0:b2805b6888dc 127 #define CHAPCS_PENDING 2 /* Auth us to peer when lower up */
robert_jw 0:b2805b6888dc 128 #define CHAPCS_LISTEN 3 /* Listening for a challenge */
robert_jw 0:b2805b6888dc 129 #define CHAPCS_RESPONSE 4 /* Sent response, waiting for status */
robert_jw 0:b2805b6888dc 130 #define CHAPCS_OPEN 5 /* We've received Success */
robert_jw 0:b2805b6888dc 131
robert_jw 0:b2805b6888dc 132 /*
robert_jw 0:b2805b6888dc 133 * Server (authenticator) states.
robert_jw 0:b2805b6888dc 134 */
robert_jw 0:b2805b6888dc 135 #define CHAPSS_INITIAL 0 /* Lower layer down, not opened */
robert_jw 0:b2805b6888dc 136 #define CHAPSS_CLOSED 1 /* Lower layer up, not opened */
robert_jw 0:b2805b6888dc 137 #define CHAPSS_PENDING 2 /* Auth peer when lower up */
robert_jw 0:b2805b6888dc 138 #define CHAPSS_INITIAL_CHAL 3 /* We've sent the first challenge */
robert_jw 0:b2805b6888dc 139 #define CHAPSS_OPEN 4 /* We've sent a Success msg */
robert_jw 0:b2805b6888dc 140 #define CHAPSS_RECHALLENGE 5 /* We've sent another challenge */
robert_jw 0:b2805b6888dc 141 #define CHAPSS_BADAUTH 6 /* We've sent a Failure msg */
robert_jw 0:b2805b6888dc 142
robert_jw 0:b2805b6888dc 143 extern chap_state chap[];
robert_jw 0:b2805b6888dc 144
robert_jw 0:b2805b6888dc 145 void ChapAuthWithPeer (int, char *, u_char);
robert_jw 0:b2805b6888dc 146 void ChapAuthPeer (int, char *, u_char);
robert_jw 0:b2805b6888dc 147
robert_jw 0:b2805b6888dc 148 extern struct protent chap_protent;
robert_jw 0:b2805b6888dc 149
robert_jw 0:b2805b6888dc 150 #endif /* CHAP_H */