| /***************************************************************************** |
| * chap.h - Network Challenge Handshake Authentication Protocol header file. |
| * |
| * Copyright (c) 2003 by Marc Boucher, Services Informatiques (MBSI) inc. |
| * portions Copyright (c) 1998 Global Election Systems Inc. |
| * |
| * The authors hereby grant permission to use, copy, modify, distribute, |
| * and license this software and its documentation for any purpose, provided |
| * that existing copyright notices are retained in all copies and that this |
| * notice and the following disclaimer are included verbatim in any |
| * distributions. No written agreement, license, or royalty fee is required |
| * for any of the authorized uses. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE CONTRIBUTORS *AS IS* AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| ****************************************************************************** |
| * REVISION HISTORY |
| * |
| * 03-01-01 Marc Boucher <marc@mbsi.ca> |
| * Ported to lwIP. |
| * 97-12-03 Guy Lancaster <lancasterg@acm.org>, Global Election Systems Inc. |
| * Original built from BSD network code. |
| ******************************************************************************/ |
| /* |
| * chap.h - Challenge Handshake Authentication Protocol definitions. |
| * |
| * Copyright (c) 1993 The Australian National University. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms are permitted |
| * provided that the above copyright notice and this paragraph are |
| * duplicated in all such forms and that any documentation, |
| * advertising materials, and other materials related to such |
| * distribution and use acknowledge that the software was developed |
| * by the Australian National University. The name of the University |
| * may not be used to endorse or promote products derived from this |
| * software without specific prior written permission. |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * Copyright (c) 1991 Gregory M. Christy |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms are permitted |
| * provided that the above copyright notice and this paragraph are |
| * duplicated in all such forms and that any documentation, |
| * advertising materials, and other materials related to such |
| * distribution and use acknowledge that the software was developed |
| * by the author. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
| * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
| * |
| * $Id: chap.h,v 1.6 2010/01/24 13:19:34 goldsimon Exp $ |
| */ |
| |
| #ifndef CHAP_H |
| #define CHAP_H |
| |
| /* Code + ID + length */ |
| #define CHAP_HEADERLEN 4 |
| |
| /* |
| * CHAP codes. |
| */ |
| |
| #define CHAP_DIGEST_MD5 5 /* use MD5 algorithm */ |
| #define MD5_SIGNATURE_SIZE 16 /* 16 bytes in a MD5 message digest */ |
| #define CHAP_MICROSOFT 0x80 /* use Microsoft-compatible alg. */ |
| #define MS_CHAP_RESPONSE_LEN 49 /* Response length for MS-CHAP */ |
| |
| #define CHAP_CHALLENGE 1 |
| #define CHAP_RESPONSE 2 |
| #define CHAP_SUCCESS 3 |
| #define CHAP_FAILURE 4 |
| |
| /* |
| * Challenge lengths (for challenges we send) and other limits. |
| */ |
| #define MIN_CHALLENGE_LENGTH 32 |
| #define MAX_CHALLENGE_LENGTH 64 |
| #define MAX_RESPONSE_LENGTH 64 /* sufficient for MD5 or MS-CHAP */ |
| |
| /* |
| * Each interface is described by a chap structure. |
| */ |
| |
| typedef struct chap_state { |
| int unit; /* Interface unit number */ |
| int clientstate; /* Client state */ |
| int serverstate; /* Server state */ |
| u_char challenge[MAX_CHALLENGE_LENGTH]; /* last challenge string sent */ |
| u_char chal_len; /* challenge length */ |
| u_char chal_id; /* ID of last challenge */ |
| u_char chal_type; /* hash algorithm for challenges */ |
| u_char id; /* Current id */ |
| char *chal_name; /* Our name to use with challenge */ |
| int chal_interval; /* Time until we challenge peer again */ |
| int timeouttime; /* Timeout time in seconds */ |
| int max_transmits; /* Maximum # of challenge transmissions */ |
| int chal_transmits; /* Number of transmissions of challenge */ |
| int resp_transmits; /* Number of transmissions of response */ |
| u_char response[MAX_RESPONSE_LENGTH]; /* Response to send */ |
| u_char resp_length; /* length of response */ |
| u_char resp_id; /* ID for response messages */ |
| u_char resp_type; /* hash algorithm for responses */ |
| char *resp_name; /* Our name to send with response */ |
| } chap_state; |
| |
| |
| /* |
| * Client (peer) states. |
| */ |
| #define CHAPCS_INITIAL 0 /* Lower layer down, not opened */ |
| #define CHAPCS_CLOSED 1 /* Lower layer up, not opened */ |
| #define CHAPCS_PENDING 2 /* Auth us to peer when lower up */ |
| #define CHAPCS_LISTEN 3 /* Listening for a challenge */ |
| #define CHAPCS_RESPONSE 4 /* Sent response, waiting for status */ |
| #define CHAPCS_OPEN 5 /* We've received Success */ |
| |
| /* |
| * Server (authenticator) states. |
| */ |
| #define CHAPSS_INITIAL 0 /* Lower layer down, not opened */ |
| #define CHAPSS_CLOSED 1 /* Lower layer up, not opened */ |
| #define CHAPSS_PENDING 2 /* Auth peer when lower up */ |
| #define CHAPSS_INITIAL_CHAL 3 /* We've sent the first challenge */ |
| #define CHAPSS_OPEN 4 /* We've sent a Success msg */ |
| #define CHAPSS_RECHALLENGE 5 /* We've sent another challenge */ |
| #define CHAPSS_BADAUTH 6 /* We've sent a Failure msg */ |
| |
| extern chap_state chap[]; |
| |
| void ChapAuthWithPeer (int, char *, u_char); |
| void ChapAuthPeer (int, char *, u_char); |
| |
| extern struct protent chap_protent; |
| |
| #endif /* CHAP_H */ |
