2 * auth.c User authentication.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
20 * Copyright 2000,2006 The FreeRADIUS server project
21 * Copyright 2000 Miquel van Smoorenburg <miquels@cistron.nl>
22 * Copyright 2000 Jeff Carneal <jeff@apex.net>
26 #include <freeradius-devel/radiusd.h>
27 #include <freeradius-devel/modules.h>
28 #include <freeradius-devel/rad_assert.h>
33 * Return a short string showing the terminal server, port
34 * and calling station ID.
36 char *auth_name(char *buf, size_t buflen, REQUEST *request, int do_cli)
43 if ((cli = pairfind(request->packet->vps, PW_CALLING_STATION_ID, 0, TAG_ANY)) == NULL)
45 if ((pair = pairfind(request->packet->vps, PW_NAS_PORT, 0, TAG_ANY)) != NULL)
46 port = pair->vp_integer;
48 if (request->packet->dst_port == 0) {
49 if (pairfind(request->packet->vps, PW_FREERADIUS_PROXIED_TO, 0, TAG_ANY)) {
50 tls = " via TLS tunnel";
52 tls = " via proxy to virtual server";
56 snprintf(buf, buflen, "from client %.128s port %u%s%.128s%s",
57 request->client->shortname, port,
58 (do_cli ? " cli " : ""), (do_cli ? (char *)cli->vp_strvalue : ""),
67 * Make sure user/pass are clean
70 static int rad_authlog(char const *msg, REQUEST *request, int goodpass)
73 char const *extra_msg = NULL;
74 char clean_password[1024];
75 char clean_username[1024];
79 VALUE_PAIR *username = NULL;
81 if (!request->root->log_auth) {
86 * Get the correct username based on the configured value
88 if (log_stripped_names == 0) {
89 username = pairfind(request->packet->vps, PW_USER_NAME, 0, TAG_ANY);
91 username = request->username;
95 * Clean up the username
97 if (username == NULL) {
98 strcpy(clean_username, "<no User-Name attribute>");
100 fr_print_string((char *)username->vp_strvalue,
102 clean_username, sizeof(clean_username));
106 * Clean up the password
108 if (request->root->log_auth_badpass || request->root->log_auth_goodpass) {
109 if (!request->password) {
110 VALUE_PAIR *auth_type;
112 auth_type = pairfind(request->config_items, PW_AUTH_TYPE, 0, TAG_ANY);
114 snprintf(clean_password, sizeof(clean_password),
115 "<via Auth-Type = %s>",
116 dict_valnamebyattr(PW_AUTH_TYPE, 0,
117 auth_type->vp_integer));
119 strcpy(clean_password, "<no User-Password attribute>");
121 } else if (pairfind(request->packet->vps, PW_CHAP_PASSWORD, 0, TAG_ANY)) {
122 strcpy(clean_password, "<CHAP-Password>");
124 fr_print_string((char *)request->password->vp_strvalue,
125 request->password->length,
126 clean_password, sizeof(clean_password));
131 logit = request->root->log_auth_goodpass;
132 extra_msg = request->root->auth_goodpass_msg;
134 logit = request->root->log_auth_badpass;
135 extra_msg = request->root->auth_badpass_msg;
141 if (radius_xlat(p, sizeof(extra) - 1, request, extra_msg, NULL, NULL) < 0) {
148 radlog_request(L_AUTH, 0, request, "%s: [%s%s%s] (%s)%s",
152 logit ? clean_password : "",
153 auth_name(buf, sizeof(buf), request, 1),
164 * -2 Rejected (Auth-Type = Reject, send Port-Message back)
165 * 1 End check & return, don't reply
167 * NOTE: NOT the same as the RLM_ values !
169 static int rad_check_password(REQUEST *request)
171 VALUE_PAIR *auth_type_pair;
172 VALUE_PAIR *cur_config_item;
175 int auth_type_count = 0;
179 * Look for matching check items. We skip the whole lot
180 * if the authentication type is PW_AUTHTYPE_ACCEPT or
181 * PW_AUTHTYPE_REJECT.
183 cur_config_item = request->config_items;
184 while(((auth_type_pair = pairfind(cur_config_item, PW_AUTH_TYPE, 0, TAG_ANY))) != NULL) {
185 auth_type = auth_type_pair->vp_integer;
188 RDEBUG2("Found Auth-Type = %s",
189 dict_valnamebyattr(PW_AUTH_TYPE, 0, auth_type));
190 cur_config_item = auth_type_pair->next;
192 if (auth_type == PW_AUTHTYPE_REJECT) {
193 RDEBUG2("Auth-Type = Reject, rejecting user");
199 * Warn if more than one Auth-Type was found, because only the last
200 * one found will actually be used.
202 if (( auth_type_count > 1) && (debug_flag)) {
203 radlog_request(L_ERR, 0, request, "Warning: Found %d auth-types on request for user '%s'",
204 auth_type_count, request->username->vp_strvalue);
208 * This means we have a proxy reply or an accept and it wasn't
209 * rejected in the above loop. So that means it is accepted and we
210 * do no further authentication.
212 if ((auth_type == PW_AUTHTYPE_ACCEPT)
217 RDEBUG2("Auth-Type = Accept, accepting the user");
222 * Check that Auth-Type has been set, and reject if not.
224 * Do quick checks to see if Cleartext-Password or Crypt-Password have
225 * been set, and complain if so.
228 if (pairfind(request->config_items, PW_CRYPT_PASSWORD, 0, TAG_ANY) != NULL) {
229 RWDEBUG2("Please update your configuration, and remove 'Auth-Type = Crypt'");
230 RWDEBUG2("Use the PAP module instead.");
232 else if (pairfind(request->config_items, PW_CLEARTEXT_PASSWORD, 0, TAG_ANY) != NULL) {
233 RWDEBUG2("Please update your configuration, and remove 'Auth-Type = Local'");
234 RWDEBUG2("Use the PAP or CHAP modules instead.");
238 * The admin hasn't told us how to
239 * authenticate the user, so we reject them!
244 REDEBUG2("No Auth-Type found: rejecting the user via Post-Auth-Type = Reject");
249 * See if there is a module that handles
250 * this Auth-Type, and turn the RLM_ return
251 * status into the values as defined at
252 * the top of this function.
254 result = process_authenticate(auth_type, request);
257 * An authentication module FAIL
258 * return code, or any return code that
259 * is not expected from authentication,
260 * is the same as an explicit REJECT!
262 case RLM_MODULE_FAIL:
263 case RLM_MODULE_INVALID:
264 case RLM_MODULE_NOOP:
265 case RLM_MODULE_NOTFOUND:
266 case RLM_MODULE_REJECT:
267 case RLM_MODULE_UPDATED:
268 case RLM_MODULE_USERLOCK:
275 case RLM_MODULE_HANDLED:
284 * Post-authentication step processes the response before it is
285 * sent to the NAS. It can receive both Access-Accept and Access-Reject
288 int rad_postauth(REQUEST *request)
291 int postauth_type = 0;
295 * Do post-authentication calls. ignoring the return code.
297 vp = pairfind(request->config_items, PW_POST_AUTH_TYPE, 0, TAG_ANY);
299 postauth_type = vp->vp_integer;
300 RDEBUG2("Using Post-Auth-Type %s",
301 dict_valnamebyattr(PW_POST_AUTH_TYPE, 0, postauth_type));
303 result = process_post_auth(postauth_type, request);
306 * The module failed, or said to reject the user: Do so.
308 case RLM_MODULE_FAIL:
309 case RLM_MODULE_INVALID:
310 case RLM_MODULE_REJECT:
311 case RLM_MODULE_USERLOCK:
313 request->reply->code = PW_AUTHENTICATION_REJECT;
314 result = RLM_MODULE_REJECT;
317 * The module handled the request, cancel the reply.
319 case RLM_MODULE_HANDLED:
323 * The module had a number of OK return codes.
325 case RLM_MODULE_NOOP:
326 case RLM_MODULE_NOTFOUND:
328 case RLM_MODULE_UPDATED:
329 result = RLM_MODULE_OK;
336 * Process and reply to an authentication request
338 * The return value of this function isn't actually used right now, so
339 * it's not entirely clear if it is returning the right things. --Pac.
341 int rad_authenticate(REQUEST *request)
343 VALUE_PAIR *namepair;
344 #ifdef WITH_SESSION_MGMT
345 VALUE_PAIR *check_item;
347 VALUE_PAIR *auth_item = NULL;
348 VALUE_PAIR *module_msg;
349 VALUE_PAIR *tmp = NULL;
356 * If this request got proxied to another server, we need
357 * to check whether it authenticated the request or not.
359 if (request->proxy_reply) {
360 switch (request->proxy_reply->code) {
362 * Reply of ACCEPT means accept, thus set Auth-Type
365 case PW_AUTHENTICATION_ACK:
366 tmp = radius_paircreate(request,
367 &request->config_items,
369 if (tmp) tmp->vp_integer = PW_AUTHTYPE_ACCEPT;
373 * Challenges are punted back to the NAS without any
374 * further processing.
376 case PW_ACCESS_CHALLENGE:
377 request->reply->code = PW_ACCESS_CHALLENGE;
378 return RLM_MODULE_OK;
380 * ALL other replies mean reject. (this is fail-safe)
382 * Do NOT do any authorization or authentication. They
383 * are being rejected, so we minimize the amount of work
384 * done by the server, by rejecting them here.
386 case PW_AUTHENTICATION_REJECT:
387 rad_authlog("Login incorrect (Home Server says so)",
389 request->reply->code = PW_AUTHENTICATION_REJECT;
390 return RLM_MODULE_REJECT;
393 rad_authlog("Login incorrect (Home Server failed to respond)",
395 return RLM_MODULE_REJECT;
401 * Get the username from the request.
403 * Note that namepair MAY be NULL, in which case there
404 * is no User-Name attribute in the request.
406 namepair = request->username;
409 * Look for, and cache, passwords.
411 if (!request->password) {
412 request->password = pairfind(request->packet->vps, PW_USER_PASSWORD, 0, TAG_ANY);
416 * Discover which password we want to use.
418 auth_item = request->password;
420 auth_item = pairfind(request->packet->vps, PW_CHAP_PASSWORD, 0, TAG_ANY);
422 request->password = auth_item;
425 * Get the user's authorization information from the database
428 result = process_authorize(autz_type, request);
430 case RLM_MODULE_NOOP:
431 case RLM_MODULE_NOTFOUND:
433 case RLM_MODULE_UPDATED:
435 case RLM_MODULE_HANDLED:
437 case RLM_MODULE_FAIL:
438 case RLM_MODULE_INVALID:
439 case RLM_MODULE_REJECT:
440 case RLM_MODULE_USERLOCK:
442 if ((module_msg = pairfind(request->packet->vps, PW_MODULE_FAILURE_MESSAGE, 0, TAG_ANY)) != NULL) {
443 char msg[MAX_STRING_LEN + 16];
444 snprintf(msg, sizeof(msg), "Invalid user (%s)",
445 module_msg->vp_strvalue);
446 rad_authlog(msg,request,0);
448 rad_authlog("Invalid user", request, 0);
450 request->reply->code = PW_AUTHENTICATION_REJECT;
454 tmp = pairfind(request->config_items, PW_AUTZ_TYPE, 0, TAG_ANY);
456 autz_type = tmp->vp_integer;
457 RDEBUG2("Using Autz-Type %s",
458 dict_valnamebyattr(PW_AUTZ_TYPE, 0, autz_type));
465 * If we haven't already proxied the packet, then check
466 * to see if we should. Maybe one of the authorize
467 * modules has decided that a proxy should be used. If
468 * so, get out of here and send the packet.
472 (request->proxy == NULL) &&
474 ((tmp = pairfind(request->config_items, PW_PROXY_TO_REALM, 0, TAG_ANY)) != NULL)) {
477 realm = realm_find2(tmp->vp_strvalue);
480 * Don't authenticate, as the request is going to
483 if (realm && realm->auth_pool) {
484 return RLM_MODULE_OK;
488 * Catch users who set Proxy-To-Realm to a LOCAL
489 * realm (sigh). But don't complain if it is
492 if (realm &&(strcmp(realm->name, "LOCAL") != 0)) {
493 RWDEBUG2("You set Proxy-To-Realm = %s, but it is a LOCAL realm! Cancelling proxy request.", realm->name);
497 RWDEBUG2("You set Proxy-To-Realm = %s, but the realm does not exist! Cancelling invalid proxy request.", tmp->vp_strvalue);
506 * Perhaps there is a Stripped-User-Name now.
508 namepair = request->username;
514 result = rad_check_password(request);
517 return RLM_MODULE_HANDLED;
522 * Failed to validate the user.
524 * We PRESUME that the code which failed will clean up
525 * request->reply->vps, to be ONLY the reply items it
526 * wants to send back.
529 RDEBUG2("Failed to authenticate the user.");
530 request->reply->code = PW_AUTHENTICATION_REJECT;
532 if ((module_msg = pairfind(request->packet->vps, PW_MODULE_FAILURE_MESSAGE, 0, TAG_ANY)) != NULL){
533 char msg[MAX_STRING_LEN+19];
535 snprintf(msg, sizeof(msg), "Login incorrect (%s)",
536 module_msg->vp_strvalue);
537 rad_authlog(msg, request, 0);
539 rad_authlog("Login incorrect", request, 0);
542 /* double check: maybe the secret is wrong? */
543 if ((debug_flag > 1) && (auth_item != NULL) &&
544 (auth_item->da->attr == PW_USER_PASSWORD)) {
547 p = (uint8_t *) auth_item->vp_strvalue;
551 size = fr_utf8_char(p);
553 log_debug(" WARNING: Unprintable characters in the password. Double-check the shared secret on the server and the NAS!");
561 #ifdef WITH_SESSION_MGMT
563 (check_item = pairfind(request->config_items, PW_SIMULTANEOUS_USE, 0, TAG_ANY)) != NULL) {
564 int r, session_type = 0;
566 char umsg[MAX_STRING_LEN + 1];
567 char const *user_msg = NULL;
569 tmp = pairfind(request->config_items, PW_SESSION_TYPE, 0, TAG_ANY);
571 session_type = tmp->vp_integer;
572 RDEBUG2("Using Session-Type %s",
573 dict_valnamebyattr(PW_SESSION_TYPE, 0, session_type));
577 * User authenticated O.K. Now we have to check
578 * for the Simultaneous-Use parameter.
581 (r = process_checksimul(session_type, request, check_item->vp_integer)) != 0) {
585 /* Multilink attempt. Check if port-limit > simultaneous-use */
586 VALUE_PAIR *port_limit;
588 if ((port_limit = pairfind(request->reply->vps, PW_PORT_LIMIT, 0, TAG_ANY)) != NULL &&
589 port_limit->vp_integer > check_item->vp_integer){
590 RDEBUG2("MPP is OK");
595 if (check_item->vp_integer > 1) {
596 snprintf(umsg, sizeof(umsg),
597 "\r\nYou are already logged in %d times - access denied\r\n\n",
598 (int)check_item->vp_integer);
601 user_msg = "\r\nYou are already logged in - access denied\r\n\n";
604 request->reply->code = PW_AUTHENTICATION_REJECT;
607 * They're trying to log in too many times.
608 * Remove ALL reply attributes.
610 pairfree(&request->reply->vps);
611 pairmake_reply("Reply-Message",
614 snprintf(logstr, sizeof(logstr), "Multiple logins (max %d) %s",
615 check_item->vp_integer,
616 r == 2 ? "[MPP attempt]" : "");
617 rad_authlog(logstr, request, 1);
626 * Result should be >= 0 here - if not, it means the user
627 * is rejected, so we just process post-auth and return.
630 return RLM_MODULE_REJECT;
634 * Set the reply to Access-Accept, if it hasn't already
635 * been set to something. (i.e. Access-Challenge)
637 if (request->reply->code == 0)
638 request->reply->code = PW_AUTHENTICATION_ACK;
640 if ((module_msg = pairfind(request->packet->vps, PW_MODULE_SUCCESS_MESSAGE, 0, TAG_ANY)) != NULL){
641 char msg[MAX_STRING_LEN+12];
643 snprintf(msg, sizeof(msg), "Login OK (%s)",
644 module_msg->vp_strvalue);
645 rad_authlog(msg, request, 1);
647 rad_authlog("Login OK", request, 1);
654 * Run a virtual server auth and postauth
657 int rad_virtual_server(REQUEST *request)
663 * We currently only handle AUTH packets here.
664 * This could be expanded to handle other packets as well if required.
666 rad_assert(request->packet->code == PW_AUTHENTICATION_REQUEST);
668 result = rad_authenticate(request);
670 if (request->reply->code == PW_AUTHENTICATION_REJECT) {
671 pairdelete(&request->config_items, PW_POST_AUTH_TYPE, 0, TAG_ANY);
672 vp = pairmake_config("Post-Auth-Type", "Reject", T_OP_SET);
673 if (vp) rad_postauth(request);
676 if (request->reply->code == PW_AUTHENTICATION_ACK) {
677 rad_postauth(request);