projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 2a905848 RG |
1 | /* |
| 2 | * chap.h - Cryptographic Handshake Authentication Protocol definitions. | |
| 3 | * based on November 1991 draft of PPP Authentication RFC | |
| 4 | * | |
| 5 | * Copyright (c) 1991 Gregory M. Christy | |
| 6 | * All rights reserved. | |
| 7 | * | |
| 8 | * Redistribution and use in source and binary forms are permitted | |
| 9 | * provided that the above copyright notice and this paragraph are | |
| 10 | * duplicated in all such forms and that any documentation, | |
| 11 | * advertising materials, and other materials related to such | |
| 12 | * distribution and use acknowledge that the software was developed | |
| 13 | * by the author. | |
| 14 | * | |
| 15 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
| 16 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
| 17 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| 18 | */ | |
| 19 | ||
| 20 | #ifndef __CHAP_INCLUDE__ | |
| 21 | ||
| 22 | /* Code + ID + length */ | |
| 23 | #define CHAP_HEADERLEN (sizeof (u_char) + sizeof (u_char) + sizeof (u_short)) | |
| 24 | ||
| 25 | /* | |
| 26 | * CHAP codes. | |
| 27 | */ | |
| 28 | ||
| 29 | #define CHAP_DIGEST_MD5 5 /* use MD5 algorithm */ | |
| 30 | ||
| 31 | #define MD5_SIGNATURE_SIZE 16 /* 16 bytes in a MD5 message digest */ | |
| 32 | ||
| 33 | #define CHAP_NOCALLBACK 0 /* don't call back after successful auth */ | |
| 34 | #define CHAP_CALLBACK 1 /* do call back */ | |
| 35 | ||
| 36 | #define CHAP_CHALLENGE 1 | |
| 37 | #define CHAP_RESPONSE 2 | |
| 38 | #define CHAP_SUCCESS 3 | |
| 39 | #define CHAP_FAILURE 4 | |
| 40 | ||
| 41 | /* | |
| 42 | * Challenge lengths | |
| 43 | */ | |
| 44 | ||
| 45 | #define MIN_CHALLENGE_LENGTH 64 | |
| 46 | #define MAX_CHALLENGE_LENGTH 128 | |
| 47 | ||
| 48 | #define MAX_SECRET_LEN 128 | |
| 49 | /* | |
| 50 | * Each interface is described by chap structure. | |
| 51 | */ | |
| 52 | ||
| 53 | typedef struct chap_state { | |
| 54 | int unit; /* Interface unit number */ | |
| 55 | u_char chal_str[MAX_CHALLENGE_LENGTH + 1]; /* challenge string */ | |
| 56 | u_char chal_len; /* challenge length */ | |
| 57 | int clientstate; /* Client state */ | |
| 58 | int serverstate; /* Server state */ | |
| 59 | int flags; /* Flags */ | |
| 60 | unsigned char id; /* Current id */ | |
| 61 | int timeouttime; /* Timeout time in milliseconds */ | |
| 62 | int retransmits; /* Number of retransmissions */ | |
| 63 | } chap_state; | |
| 64 | ||
| 65 | ||
| 66 | /* | |
| 67 | * Client states. | |
| 68 | */ | |
| 69 | #define CHAPCS_CLOSED 1 /* Connection down */ | |
| 70 | #define CHAPCS_CHALLENGE_SENT 2 /* We've sent a challenge */ | |
| 71 | #define CHAPCS_OPEN 3 /* We've received an Ack */ | |
| 72 | ||
| 73 | /* | |
| 74 | * Server states. | |
| 75 | */ | |
| 76 | #define CHAPSS_CLOSED 1 /* Connection down */ | |
| 77 | #define CHAPSS_LISTEN 2 /* Listening for a challenge */ | |
| 78 | #define CHAPSS_OPEN 3 /* We've sent an Ack */ | |
| 79 | ||
| 80 | /* | |
| 81 | * Flags. | |
| 82 | */ | |
| 83 | #define CHAPF_LOWERUP 0x01 /* The lower level is UP */ | |
| 84 | #define CHAPF_AWPPENDING 0x02 /* Auth with peer pending */ | |
| 85 | #define CHAPF_APPENDING 0x04 /* Auth peer pending */ | |
| 86 | #define CHAPF_UPVALID 0x08 /* values valid */ | |
| 87 | #define CHAPF_UPPENDING 0x10 /* values pending */ | |
| 88 | ||
| 89 | ||
| 90 | /* | |
| 91 | * Timeouts. | |
| 92 | */ | |
| 93 | #define CHAP_DEFTIMEOUT 3 /* Timeout time in seconds */ | |
| 94 | ||
| 95 | extern chap_state chap[]; | |
| 96 | ||
| 97 | void ChapInit __ARGS((int)); | |
| 98 | void ChapAuthWithPeer __ARGS((int)); | |
| 99 | void ChapAuthPeer __ARGS((int)); | |
| 100 | void ChapLowerUp __ARGS((int)); | |
| 101 | void ChapLowerDown __ARGS((int)); | |
| 102 | void ChapInput __ARGS((int, u_char *, int)); | |
| 103 | void ChapProtocolReject __ARGS((int)); | |
| 104 | ||
| 105 | #define __CHAP_INCLUDE__ | |
| 106 | #endif /* __CHAP_INCLUDE__ */ |