1:
2: /*
3: * auth.h
4: *
5: * Written by Archie Cobbs <archie@freebsd.org>
6: * Copyright (c) 1995-1999 Whistle Communications, Inc. All rights reserved.
7: * See ``COPYRIGHT.whistle''
8: */
9:
10: #ifndef _AUTH_H_
11: #define _AUTH_H_
12:
13: #include "timer.h"
14: #include "ppp.h"
15: #include "pap.h"
16: #include "chap.h"
17: #include "eap.h"
18: #include "radius.h"
19:
20: #ifdef USE_SYSTEM
21: #include <pwd.h>
22: #endif
23: #ifdef USE_OPIE
24: #include <opie.h>
25: #endif
26:
27: /*
28: * DEFINITIONS
29: */
30:
31: #define AUTH_RETRIES 5
32:
33: #define AUTH_MSG_WELCOME "Welcome"
34: #define AUTH_MSG_INVALID "Login incorrect"
35: #define AUTH_MSG_BAD_PACKET "Incorrectly formatted packet"
36: #define AUTH_MSG_NOT_ALLOWED "Login not allowed for this account"
37: #define AUTH_MSG_NOT_EXPECTED "Unexpected packet"
38: #define AUTH_MSG_ACCT_DISAB "Account disabled"
39: #define AUTH_MSG_RESTR_HOURS "Login hours restricted"
40:
41: #define AUTH_PEER_TO_SELF 0
42: #define AUTH_SELF_TO_PEER 1
43:
44: #define AUTH_FAIL_INVALID_LOGIN 0
45: #define AUTH_FAIL_ACCT_DISABLED 1
46: #define AUTH_FAIL_NO_PERMISSION 2
47: #define AUTH_FAIL_RESTRICTED_HOURS 3
48: #define AUTH_FAIL_INVALID_PACKET 4
49: #define AUTH_FAIL_NOT_EXPECTED 5
50:
51: #define AUTH_STATUS_UNDEF 0
52: #define AUTH_STATUS_FAIL 1
53: #define AUTH_STATUS_SUCCESS 2
54: #define AUTH_STATUS_BUSY 3
55:
56: #define AUTH_PW_HASH_NONE 0
57: #define AUTH_PW_HASH_NT 1
58:
59: #define AUTH_ACCT_START 1
60: #define AUTH_ACCT_STOP 2
61: #define AUTH_ACCT_UPDATE 3
62:
63: #define MPPE_POLICY_NONE 0
64: #define MPPE_POLICY_ALLOWED 1
65: #define MPPE_POLICY_REQUIRED 2
66:
67: #define MPPE_TYPE_0BIT 0 /* No encryption required */
68: #define MPPE_TYPE_40BIT 2
69: #define MPPE_TYPE_128BIT 4
70: #define MPPE_TYPE_56BIT 8
71:
72: /* Configuration options */
73: enum {
74: AUTH_CONF_RADIUS_AUTH = 1,
75: AUTH_CONF_RADIUS_ACCT,
76: AUTH_CONF_INTERNAL,
77: AUTH_CONF_EXT_AUTH,
78: AUTH_CONF_EXT_ACCT,
79: AUTH_CONF_SYSTEM_AUTH,
80: AUTH_CONF_SYSTEM_ACCT,
81: AUTH_CONF_PAM_AUTH,
82: AUTH_CONF_PAM_ACCT,
83: AUTH_CONF_OPIE,
84: AUTH_CONF_ACCT_MANDATORY
85: };
86:
87: #if defined(USE_NG_BPF) || defined(USE_IPFW)
88: struct acl { /* List of ACLs received from auth */
89: u_short number; /* ACL number given by auth server */
90: u_short real_number; /* ACL number allocated my mpd */
91: struct acl *next;
92: char name[ACL_NAME_LEN]; /* Name of ACL */
93: char rule[1]; /* Text of ACL (Dynamically sized!) */
94: };
95:
96: #endif
97:
98: struct authparams {
99: char authname[AUTH_MAX_AUTHNAME];
100: char password[AUTH_MAX_PASSWORD];
101:
102: struct papparams pap;
103: struct chapparams chap;
104:
105: struct u_range range; /* IP range allowed to user */
106: u_char range_valid; /* range is valid */
107: u_char netmask; /* IP Netmask */
108: u_char vjc_enable; /* VJC requested by AAA */
109:
110: u_char ippool_used;
111: char ippool[LINK_MAX_NAME];
112:
113: struct in_addr peer_dns[2]; /* DNS servers for peer to use */
114: struct in_addr peer_nbns[2]; /* NBNS servers for peer to use */
115:
116: char *eapmsg; /* EAP Msg for forwarding to RADIUS
117: * server */
118: int eapmsg_len;
119: u_char *state; /* copy of the state attribute, needed
120: * for accounting */
121: int state_len;
122: u_char *class; /* copy of the class attribute, needed
123: * for accounting */
124: int class_len;
125:
126: char *filter_id; /* RADIUS Framed-Filter-Id attribute */
127:
128: char action[8 + LINK_MAX_NAME];
129:
130: #ifdef USE_IPFW
131: struct acl *acl_rule; /* ipfw rules */
132: struct acl *acl_pipe; /* ipfw pipes */
133: struct acl *acl_queue; /* ipfw queues */
134: struct acl *acl_table; /* ipfw tables */
135: #endif
136:
137: #ifdef USE_NG_BPF
138: struct acl *acl_filters[ACL_FILTERS]; /* mpd's internal bpf filters */
139: struct acl *acl_limits[ACL_DIRS]; /* traffic limits based on
140: * mpd's filters */
141:
142: char std_acct[ACL_DIRS][ACL_NAME_LEN]; /* Names of ACL rerurned
143: * in standard
144: * accounting */
145: #endif
146:
147: u_int session_timeout; /* Session-Timeout */
148: u_int idle_timeout; /* Idle-Timeout */
149: u_int acct_update; /* interval for accouting updates */
150: u_int acct_update_lim_recv;
151: u_int acct_update_lim_xmit;
152: char *msdomain; /* Microsoft domain */
153: SLIST_HEAD (, ifaceroute) routes;
154: u_short mtu; /* MTU */
155:
156: u_char authentic; /* wich backend was used */
157:
158: char callingnum[128]; /* hr representation of the calling
159: * number */
160: char callednum[128]; /* hr representation of the called
161: * number */
162: char selfname[64]; /* hr representation of the self name */
163: char peername[64]; /* hr representation of the peer name */
164: char selfaddr[64]; /* hr representation of the self
165: * address */
166: char peeraddr[64]; /* hr representation of the peer
167: * address */
168: char peerport[6]; /* hr representation of the peer port */
169: char peermacaddr[32]; /* hr representation of the peer MAC
170: * address */
171: char peeriface[IFNAMSIZ]; /* hr representation of the peer
172: * interface */
173:
174: /* Iface stuff */
175: char ifname[IFNAMSIZ]; /* Interface name */
176: #ifdef SIOCSIFDESCR
177: char *ifdescr; /* Interface description */
178: #endif
179: #ifdef SIOCAIFGROUP
180: char ifgroup[IFNAMSIZ]; /* Interface group */
181: #endif
182:
183: struct {
184: int policy; /* MPPE_POLICY_* */
185: int types; /* MPPE_TYPE_*BIT bitmask */
186: u_char lm_hash[16]; /* LM-Hash */
187: u_char nt_hash[16]; /* NT-Hash */
188: u_char nt_hash_hash[16]; /* NT-Hash-Hash */
189: u_char has_lm_hash;
190: u_char has_nt_hash;
191: u_char has_keys;
192:
193: u_char chap_alg; /* Callers's CHAP algorithm */
194:
195: u_char msChal[CHAP_MSOFTv2_CHAL_LEN]; /* MSOFT challng */
196: u_char ntResp[CHAP_MSOFTv2_RESP_LEN]; /* MSOFT response */
197:
198: #ifdef CCP_MPPC
199: /* Keys when using MS-CHAPv2 or EAP */
200: u_char xmit_key[MPPE_KEY_LEN]; /* xmit start key */
201: u_char recv_key[MPPE_KEY_LEN]; /* recv start key */
202: #endif
203: } msoft;
204: };
205:
206: struct authconf {
207: struct radiusconf radius; /* RADIUS configuration */
208: char authname[AUTH_MAX_AUTHNAME]; /* Configured username */
209: char password[AUTH_MAX_PASSWORD]; /* Configured password */
210: u_int acct_update;
211: u_int acct_update_lim_recv;
212: u_int acct_update_lim_xmit;
213: int timeout; /* Authorization timeout in seconds */
214: struct optinfo options; /* Configured options */
215: char *extauth_script; /* External auth script */
216: char *extacct_script; /* External acct script */
217: char ippool[LINK_MAX_NAME];
218: };
219: typedef struct authconf *AuthConf;
220:
221: /*
222: * State of authorization process during authorization phase, contains
223: * params set by the auth-backend
224: */
225: struct auth {
226: u_short peer_to_self; /* What I need from peer */
227: u_short self_to_peer; /* What peer needs from me */
228: u_char peer_to_self_alg; /* What alg I need from peer */
229: u_char self_to_peer_alg; /* What alg peer needs from me */
230: struct pppTimer timer; /* Max time to spend doing auth */
231: struct pppTimer acct_timer; /* Timer for accounting updates */
232: struct papinfo pap; /* PAP state */
233: struct chapinfo chap; /* CHAP state */
234: struct eapinfo eap; /* EAP state */
235: struct paction *thread; /* async auth thread */
236: struct paction *acct_thread; /* async accounting auth thread */
237: struct authconf conf; /* Auth backends, RADIUS, etc. */
238: struct authparams params; /* params to pass to from auth backend */
239: struct ng_ppp_link_stat64 prev_stats; /* Previous link statistics */
240: };
241: typedef struct auth *Auth;
242:
243: struct radiusconf radius; /* RADIUS configuration */
244:
245: /*
246: * Interface between the auth-backend (secret file, RADIUS, etc.) and Mpd's
247: * internal structs.
248: */
249: struct authdata {
250: struct authconf conf; /* a copy of bundle's authconf */
251: u_short proto; /* wich proto are we using, PAP, CHAP,
252: * ... */
253: u_char alg; /* proto specific algoruthm */
254: u_int id; /* Actual, packet id */
255: u_int code; /* Proto specific code */
256: u_char acct_type; /* Accounting type, Start, Stop,
257: * Update */
258: u_char eap_radius;
259: u_char status;
260: u_char why_fail;
261: char *reply_message; /* Text wich may displayed to the user */
262: char *mschap_error; /* MSCHAP Error Message */
263: char *mschapv2resp; /* Response String for MSCHAPv2 */
264: void (*finish) (Link l, struct authdata *auth); /* Finish handler */
265: int drop_user; /* RAD_MPD_DROP_USER value sent by
266: * RADIUS server */
267: struct {
268: struct rad_handle *handle; /* the RADIUS handle */
269: } radius;
270: #ifdef USE_OPIE
271: struct {
272: struct opie data;
273: } opie;
274: #endif
275: struct { /* informational (read-only) data
276: * needed for e.g. accouting */
277: char msession_id[AUTH_MAX_SESSIONID]; /* multi-session-id */
278: char session_id[AUTH_MAX_SESSIONID]; /* session-id */
279: char ifname[IFNAMSIZ]; /* interface name */
280: uint ifindex; /* System interface index */
281: char bundname[LINK_MAX_NAME]; /* name of the bundle */
282: char lnkname[LINK_MAX_NAME]; /* name of the link */
283: struct ng_ppp_link_stat64 stats; /* Current link
284: * statistics */
285: #ifdef USE_NG_BPF
286: struct svcstat ss;
287: #endif
288: char *downReason; /* Reason for link going down */
289: time_t last_up; /* Time this link last got up */
290: PhysType phys_type; /* Device type descriptor */
291: int linkID; /* Absolute link number */
292: char peer_ident[64]; /* LCP ident received from peer */
293: struct in_addr peer_addr; /* currently assigned
294: * IP-Address of the client */
295: struct in6_addr peer_addr6; /* currently assigned
296: * IPv6-Address of the client */
297: short n_links; /* number of links in the bundle */
298: u_char originate; /* Who originated the connection */
299: } info;
300: struct authparams params; /* params to pass to from auth backend */
301: };
302: typedef struct authdata *AuthData;
303:
304: extern const struct cmdtab AuthSetCmds[];
305:
306: /*
307: * GLOBAL VARIABLES
308: */
309: extern const u_char gMsoftZeros[32];
310: extern int gMaxLogins; /* max number of concurrent logins per
311: * user */
312: extern int gMaxLoginsCI;
313:
314: /*
315: * FUNCTIONS
316: */
317:
318: extern void AuthInit(Link l);
319: extern void AuthInst(Auth auth, Auth autht);
320: extern void AuthShutdown(Link l);
321: extern void AuthStart(Link l);
322: extern void AuthStop(Link l);
323: extern void AuthInput(Link l, int proto, Mbuf bp);
324: extern void
325: AuthOutput(Link l, int proto, u_int code, u_int id,
326: const u_char *ptr, int len, int add_len,
327: u_char eap_type);
328: extern void AuthFinish(Link l, int which, int ok);
329: extern void AuthCleanup(Link l);
330: extern int AuthStat(Context ctx, int ac, char *av[], void *arg);
331: extern void AuthAccountStart(Link l, int type);
332: extern void AuthAccountTimeout(void *arg);
333: extern AuthData AuthDataNew(Link l);
334: extern void AuthDataDestroy(AuthData auth);
335: extern int
336: AuthGetData(char *authname, char *password, size_t passlen,
337: struct u_range *range, u_char *range_valid);
338: extern void AuthAsyncStart(Link l, AuthData auth);
339: extern const char *AuthFailMsg(AuthData auth, char *buf, size_t len);
340: extern const char *AuthStatusText(int status);
341: extern const char *AuthMPPEPolicyname(int policy);
342: extern const char *AuthMPPETypesname(int types, char *buf, size_t len);
343:
344: #if defined(USE_NG_BPF) || defined(USE_IPFW)
345: extern void ACLCopy(struct acl *src, struct acl **dst);
346: extern void ACLDestroy(struct acl *acl);
347:
348: #endif
349: extern void authparamsInit(struct authparams *ap);
350: extern void authparamsCopy(struct authparams *src, struct authparams *dst);
351: extern void authparamsMove(struct authparams *src, struct authparams *dst);
352: extern void authparamsDestroy(struct authparams *ap);
353:
354: #endif
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