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158 lines
5.1 KiB
158 lines
5.1 KiB
/* |
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* eap.h - Extensible Authentication Protocol for PPP (RFC 2284) |
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* |
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* Copyright (c) 2001 by Sun Microsystems, Inc. |
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* All rights reserved. |
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* |
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* Non-exclusive rights to redistribute, modify, translate, and use |
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* this software in source and binary forms, in whole or in part, is |
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* hereby granted, provided that the above copyright notice is |
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* duplicated in any source form, and that neither the name of the |
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* copyright holder nor the author is used to endorse or promote |
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* products derived from this software. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR |
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED |
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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* |
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* Original version by James Carlson |
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* |
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* $Id: eap.h,v 1.2 2003/06/11 23:56:26 paulus Exp $ |
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*/ |
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#ifndef PPP_EAP_H |
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#define PPP_EAP_H |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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/* |
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* Packet header = Code, id, length. |
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*/ |
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#define EAP_HEADERLEN 4 |
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/* EAP message codes. */ |
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#define EAP_REQUEST 1 |
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#define EAP_RESPONSE 2 |
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#define EAP_SUCCESS 3 |
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#define EAP_FAILURE 4 |
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/* EAP types */ |
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#define EAPT_IDENTITY 1 |
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#define EAPT_NOTIFICATION 2 |
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#define EAPT_NAK 3 /* (response only) */ |
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#define EAPT_MD5CHAP 4 |
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#define EAPT_OTP 5 /* One-Time Password; RFC 1938 */ |
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#define EAPT_TOKEN 6 /* Generic Token Card */ |
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/* 7 and 8 are unassigned. */ |
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#define EAPT_RSA 9 /* RSA Public Key Authentication */ |
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#define EAPT_DSS 10 /* DSS Unilateral */ |
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#define EAPT_KEA 11 /* KEA */ |
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#define EAPT_KEA_VALIDATE 12 /* KEA-VALIDATE */ |
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#define EAPT_TLS 13 /* EAP-TLS */ |
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#define EAPT_DEFENDER 14 /* Defender Token (AXENT) */ |
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#define EAPT_W2K 15 /* Windows 2000 EAP */ |
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#define EAPT_ARCOT 16 /* Arcot Systems */ |
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#define EAPT_CISCOWIRELESS 17 /* Cisco Wireless */ |
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#define EAPT_NOKIACARD 18 /* Nokia IP smart card */ |
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#define EAPT_SRP 19 /* Secure Remote Password */ |
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/* 20 is deprecated */ |
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/* EAP SRP-SHA1 Subtypes */ |
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#define EAPSRP_CHALLENGE 1 /* Request 1 - Challenge */ |
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#define EAPSRP_CKEY 1 /* Response 1 - Client Key */ |
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#define EAPSRP_SKEY 2 /* Request 2 - Server Key */ |
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#define EAPSRP_CVALIDATOR 2 /* Response 2 - Client Validator */ |
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#define EAPSRP_SVALIDATOR 3 /* Request 3 - Server Validator */ |
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#define EAPSRP_ACK 3 /* Response 3 - final ack */ |
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#define EAPSRP_LWRECHALLENGE 4 /* Req/resp 4 - Lightweight rechal */ |
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#define SRPVAL_EBIT 0x00000001 /* Use shared key for ECP */ |
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#define SRP_PSEUDO_ID "pseudo_" |
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#define SRP_PSEUDO_LEN 7 |
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#define MD5_SIGNATURE_SIZE 16 |
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#define MIN_CHALLENGE_LENGTH 16 |
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#define MAX_CHALLENGE_LENGTH 24 |
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enum eap_state_code { |
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eapInitial = 0, /* No EAP authentication yet requested */ |
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eapPending, /* Waiting for LCP (no timer) */ |
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eapClosed, /* Authentication not in use */ |
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eapListen, /* Client ready (and timer running) */ |
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eapIdentify, /* EAP Identify sent */ |
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eapSRP1, /* Sent EAP SRP-SHA1 Subtype 1 */ |
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eapSRP2, /* Sent EAP SRP-SHA1 Subtype 2 */ |
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eapSRP3, /* Sent EAP SRP-SHA1 Subtype 3 */ |
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eapMD5Chall, /* Sent MD5-Challenge */ |
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eapOpen, /* Completed authentication */ |
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eapSRP4, /* Sent EAP SRP-SHA1 Subtype 4 */ |
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eapBadAuth /* Failed authentication */ |
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}; |
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#define EAP_STATES \ |
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"Initial", "Pending", "Closed", "Listen", "Identify", \ |
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"SRP1", "SRP2", "SRP3", "MD5Chall", "Open", "SRP4", "BadAuth" |
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#define eap_client_active(esp) ((esp)->es_client.ea_state == eapListen) |
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#define eap_server_active(esp) \ |
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((esp)->es_server.ea_state >= eapIdentify && \ |
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(esp)->es_server.ea_state <= eapMD5Chall) |
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struct eap_auth { |
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char *ea_name; /* Our name */ |
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char *ea_peer; /* Peer's name */ |
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void *ea_session; /* Authentication library linkage */ |
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u_char *ea_skey; /* Shared encryption key */ |
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int ea_timeout; /* Time to wait (for retransmit/fail) */ |
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int ea_maxrequests; /* Max Requests allowed */ |
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u_short ea_namelen; /* Length of our name */ |
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u_short ea_peerlen; /* Length of peer's name */ |
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enum eap_state_code ea_state; |
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u_char ea_id; /* Current id */ |
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u_char ea_requests; /* Number of Requests sent/received */ |
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u_char ea_responses; /* Number of Responses */ |
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u_char ea_type; /* One of EAPT_* */ |
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u_int32_t ea_keyflags; /* SRP shared key usage flags */ |
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}; |
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/* |
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* Complete EAP state for one PPP session. |
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*/ |
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typedef struct eap_state { |
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int es_unit; /* Interface unit number */ |
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struct eap_auth es_client; /* Client (authenticatee) data */ |
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struct eap_auth es_server; /* Server (authenticator) data */ |
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int es_savedtime; /* Saved timeout */ |
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int es_rechallenge; /* EAP rechallenge interval */ |
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int es_lwrechallenge; /* SRP lightweight rechallenge inter */ |
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bool es_usepseudo; /* Use SRP Pseudonym if offered one */ |
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int es_usedpseudo; /* Set if we already sent PN */ |
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int es_challen; /* Length of challenge string */ |
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u_char es_challenge[MAX_CHALLENGE_LENGTH]; |
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} eap_state; |
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/* |
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* Timeouts. |
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*/ |
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#define EAP_DEFTIMEOUT 3 /* Timeout (seconds) for rexmit */ |
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#define EAP_DEFTRANSMITS 10 /* max # times to transmit */ |
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#define EAP_DEFREQTIME 20 /* Time to wait for peer request */ |
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#define EAP_DEFALLOWREQ 20 /* max # times to accept requests */ |
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extern eap_state eap_states[]; |
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void eap_authwithpeer __P((int unit, char *localname)); |
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void eap_authpeer __P((int unit, char *localname)); |
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extern struct protent eap_protent; |
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#ifdef __cplusplus |
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} |
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#endif |
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#endif /* PPP_EAP_H */ |
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