1 /***********************************************************************
5 * RADIUS plugin for pppd. Performs PAP, CHAP, MS-CHAP, MS-CHAPv2
6 * authentication using RADIUS.
8 * Copyright (C) 2002 Roaring Penguin Software Inc.
10 * Based on a patch for ipppd, which is:
11 * Copyright (C) 1996, Matjaz Godec <gody@elgo.si>
12 * Copyright (C) 1996, Lars Fenneberg <in5y050@public.uni-hamburg.de>
13 * Copyright (C) 1997, Miguel A.L. Paraz <map@iphil.net>
15 * Uses radiusclient library, which is:
16 * Copyright (C) 1995,1996,1997,1998 Lars Fenneberg <lf@elemental.net>
17 * Copyright (C) 2002 Roaring Penguin Software Inc.
19 * MPPE support is by Ralf Hofmann, <ralf.hofmann@elvido.net>, with
20 * modification from Frank Cusack, <frank@google.com>.
22 * This plugin may be distributed according to the terms of the GNU
23 * General Public License, version 2 or (at your option) any later version.
25 ***********************************************************************/
26 static char const RCSID[] =
27 "$Id: radius.c,v 1.32 2008/05/26 09:18:08 paulus Exp $";
30 #include <sys/types.h>
32 #include <sys/param.h>
34 #include <netinet/in.h>
37 #include <pppd/pppd.h>
38 #include <pppd/chap-new.h>
39 #ifdef PPP_WITH_CHAPMS
40 #include <pppd/chap_ms.h>
42 #include <pppd/mppe.h>
47 #include <pppd/ipcp.h>
49 #include "radiusclient.h"
53 #define MD5_HASH_SIZE 16
57 static char *config_file = NULL;
58 static int add_avp(char **);
59 static struct avpopt {
63 static bool portnummap = 0;
65 static option_t Options[] = {
66 { "radius-config-file", o_string, &config_file },
67 { "avpair", o_special, add_avp },
68 { "map-to-ttyname", o_bool, &portnummap,
69 "Set Radius NAS-Port attribute value via libradiusclient library", OPT_PRIO | 1 },
70 { "map-to-ifname", o_bool, &portnummap,
71 "Set Radius NAS-Port attribute to number as in interface name (Default)", OPT_PRIOSUB | 0 },
75 static int radius_secret_check(void);
76 static int radius_pap_auth(char *user,
79 struct wordlist **paddrs,
80 struct wordlist **popts);
81 static int radius_chap_verify(char *user, char *ourname, int id,
82 struct chap_digest_type *digest,
83 unsigned char *challenge,
84 unsigned char *response,
85 char *message, int message_space);
87 static void radius_ip_up(void *opaque, int arg);
88 static void radius_ip_down(void *opaque, int arg);
89 static void make_username_realm(char *user);
90 static int radius_setparams(VALUE_PAIR *vp, char *msg, REQUEST_INFO *req_info,
91 struct chap_digest_type *digest,
92 unsigned char *challenge,
93 char *message, int message_space);
94 static void radius_choose_ip(u_int32_t *addrp);
95 static int radius_init(char *msg);
96 static int get_client_port(char *ifname);
97 static int radius_allowed_address(u_int32_t addr);
98 static void radius_acct_interim(void *);
100 static int radius_setmppekeys(VALUE_PAIR *vp, REQUEST_INFO *req_info,
102 static int radius_setmppekeys2(VALUE_PAIR *vp, REQUEST_INFO *req_info);
106 #define MAXSESSIONID 32
110 #define MAXCLASSLEN 500
113 struct radius_state {
120 char user[MAXNAMELEN];
121 char config_file[MAXPATHLEN];
122 char session_id[MAXSESSIONID + 1];
124 int acct_interim_interval;
125 SERVER *authserver; /* Authentication server to use */
126 SERVER *acctserver; /* Accounting server to use */
128 char class[MAXCLASSLEN];
129 VALUE_PAIR *avp; /* Additional (user supplied) vp's to send to server */
132 void (*radius_attributes_hook)(VALUE_PAIR *) = NULL;
134 /* The pre_auth_hook MAY set authserver and acctserver if it wants.
135 In that case, they override the values in the radiusclient.conf file */
136 void (*radius_pre_auth_hook)(char const *user,
138 SERVER **acctserver) = NULL;
140 static struct radius_state rstate;
142 char pppd_version[] = PPPD_VERSION;
144 /**********************************************************************
145 * %FUNCTION: plugin_init
151 * Initializes RADIUS plugin.
152 ***********************************************************************/
156 pap_check_hook = radius_secret_check;
157 pap_auth_hook = radius_pap_auth;
159 chap_check_hook = radius_secret_check;
160 chap_verify_hook = radius_chap_verify;
162 ip_choose_hook = radius_choose_ip;
163 allowed_address_hook = radius_allowed_address;
165 add_notifier(&ip_up_notifier, radius_ip_up, NULL);
166 add_notifier(&ip_down_notifier, radius_ip_down, NULL);
168 memset(&rstate, 0, sizeof(rstate));
170 strlcpy(rstate.config_file, "/etc/radiusclient/radiusclient.conf",
171 sizeof(rstate.config_file));
173 add_options(Options);
175 info("RADIUS plugin initialized.");
178 /**********************************************************************
181 * argv -- the <attribute=value> pair to add
185 * Adds an av pair to be passed on to the RADIUS server on each request.
186 ***********************************************************************/
190 struct avpopt *p = malloc(sizeof(struct avpopt));
192 /* Append to a list of vp's for later parsing */
193 p->vpstr = strdup(*argv);
200 /**********************************************************************
201 * %FUNCTION: radius_secret_check
205 * 1 -- we are ALWAYS willing to supply a secret. :-)
207 * Tells pppd that we will try to authenticate the peer, and not to
208 * worry about looking in *-secrets file(s)
209 ***********************************************************************/
211 radius_secret_check(void)
216 /**********************************************************************
217 * %FUNCTION: radius_choose_ip
219 * addrp -- where to store the IP address
223 * If RADIUS server has specified an IP address, it is stored in *addrp.
224 ***********************************************************************/
226 radius_choose_ip(u_int32_t *addrp)
228 if (rstate.choose_ip) {
229 *addrp = rstate.ip_addr;
233 /**********************************************************************
234 * %FUNCTION: radius_pap_auth
236 * user -- user-name of peer
237 * passwd -- password supplied by peer
238 * msgp -- Message which will be sent in PAP response
239 * paddrs -- set to a list of possible peer IP addresses
240 * popts -- set to a list of additional pppd options
242 * 1 if we can authenticate, -1 if we cannot.
244 * Performs PAP authentication using RADIUS
245 ***********************************************************************/
247 radius_pap_auth(char *user,
250 struct wordlist **paddrs,
251 struct wordlist **popts)
253 VALUE_PAIR *send, *received;
256 static char radius_msg[BUF_LEN];
261 if (radius_init(radius_msg) < 0) {
265 /* Put user with potentially realm added in rstate.user */
266 make_username_realm(user);
268 if (radius_pre_auth_hook) {
269 radius_pre_auth_hook(rstate.user,
277 /* Hack... the "port" is the ppp interface number. Should really be
279 rstate.client_port = get_client_port(portnummap ? devnam : ifname);
282 rc_avpair_add(&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
285 rc_avpair_add(&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
287 rc_avpair_add(&send, PW_USER_NAME, rstate.user , 0, VENDOR_NONE);
288 rc_avpair_add(&send, PW_USER_PASSWORD, passwd, 0, VENDOR_NONE);
289 if (*remote_number) {
290 rc_avpair_add(&send, PW_CALLING_STATION_ID, remote_number, 0,
293 rc_avpair_add(&send, PW_CALLING_STATION_ID, ipparam, 0, VENDOR_NONE);
295 /* Add user specified vp's */
297 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
299 if (rstate.authserver) {
300 result = rc_auth_using_server(rstate.authserver,
301 rstate.client_port, send,
302 &received, radius_msg, NULL);
304 result = rc_auth(rstate.client_port, send, &received, radius_msg, NULL);
307 if (result == OK_RC) {
308 if (radius_setparams(received, radius_msg, NULL, NULL, NULL, NULL, 0) < 0) {
313 /* free value pairs */
314 rc_avpair_free(received);
315 rc_avpair_free(send);
317 return (result == OK_RC) ? 1 : 0;
320 /**********************************************************************
321 * %FUNCTION: radius_chap_verify
323 * user -- name of the peer
324 * ourname -- name for this machine
325 * id -- the ID byte in the challenge
326 * digest -- points to the structure representing the digest type
327 * challenge -- the challenge string we sent (length in first byte)
328 * response -- the response (hash) the peer sent back (length in 1st byte)
329 * message -- space for a message to be returned to the peer
330 * message_space -- number of bytes available at *message.
332 * 1 if the response is good, 0 if it is bad
334 * Performs CHAP, MS-CHAP and MS-CHAPv2 authentication using RADIUS.
335 ***********************************************************************/
337 radius_chap_verify(char *user, char *ourname, int id,
338 struct chap_digest_type *digest,
339 unsigned char *challenge, unsigned char *response,
340 char *message, int message_space)
342 VALUE_PAIR *send, *received;
344 static char radius_msg[BUF_LEN];
346 int challenge_len, response_len;
347 u_char cpassword[MAX_RESPONSE_LEN + 1];
349 /* Need the RADIUS secret and Request Authenticator to decode MPPE */
350 REQUEST_INFO request_info, *req_info = &request_info;
352 REQUEST_INFO *req_info = NULL;
355 challenge_len = *challenge++;
356 response_len = *response++;
360 if (radius_init(radius_msg) < 0) {
361 error("%s", radius_msg);
365 /* return error for types we can't handle */
366 if ((digest->code != CHAP_MD5)
367 #ifdef PPP_WITH_CHAPMS
368 && (digest->code != CHAP_MICROSOFT)
369 && (digest->code != CHAP_MICROSOFT_V2)
372 error("RADIUS: Challenge type %u unsupported", digest->code);
376 /* Put user with potentially realm added in rstate.user */
377 if (!rstate.done_chap_once) {
378 make_username_realm(user);
379 rstate.client_port = get_client_port (portnummap ? devnam : ifname);
380 if (radius_pre_auth_hook) {
381 radius_pre_auth_hook(rstate.user,
387 send = received = NULL;
390 rc_avpair_add (&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
393 rc_avpair_add (&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
395 rc_avpair_add (&send, PW_USER_NAME, rstate.user , 0, VENDOR_NONE);
398 * add the challenge and response fields
400 switch (digest->code) {
402 /* CHAP-Challenge and CHAP-Password */
403 if (response_len != MD5_HASH_SIZE)
406 memcpy(&cpassword[1], response, MD5_HASH_SIZE);
408 rc_avpair_add(&send, PW_CHAP_CHALLENGE,
409 challenge, challenge_len, VENDOR_NONE);
410 rc_avpair_add(&send, PW_CHAP_PASSWORD,
411 cpassword, MD5_HASH_SIZE + 1, VENDOR_NONE);
414 #ifdef PPP_WITH_CHAPMS
417 /* MS-CHAP-Challenge and MS-CHAP-Response */
418 u_char *p = cpassword;
420 if (response_len != MS_CHAP_RESPONSE_LEN)
423 /* The idiots use a different field order in RADIUS than PPP */
424 *p++ = response[MS_CHAP_USENT];
425 memcpy(p, response, MS_CHAP_LANMANRESP_LEN + MS_CHAP_NTRESP_LEN);
427 rc_avpair_add(&send, PW_MS_CHAP_CHALLENGE,
428 challenge, challenge_len, VENDOR_MICROSOFT);
429 rc_avpair_add(&send, PW_MS_CHAP_RESPONSE,
430 cpassword, MS_CHAP_RESPONSE_LEN + 1, VENDOR_MICROSOFT);
434 case CHAP_MICROSOFT_V2:
436 /* MS-CHAP-Challenge and MS-CHAP2-Response */
437 u_char *p = cpassword;
439 if (response_len != MS_CHAP2_RESPONSE_LEN)
442 /* The idiots use a different field order in RADIUS than PPP */
443 *p++ = response[MS_CHAP2_FLAGS];
444 memcpy(p, response, (MS_CHAP2_PEER_CHAL_LEN + MS_CHAP2_RESERVED_LEN
445 + MS_CHAP2_NTRESP_LEN));
447 rc_avpair_add(&send, PW_MS_CHAP_CHALLENGE,
448 challenge, challenge_len, VENDOR_MICROSOFT);
449 rc_avpair_add(&send, PW_MS_CHAP2_RESPONSE,
450 cpassword, MS_CHAP2_RESPONSE_LEN + 1, VENDOR_MICROSOFT);
456 if (*remote_number) {
457 rc_avpair_add(&send, PW_CALLING_STATION_ID, remote_number, 0,
460 rc_avpair_add(&send, PW_CALLING_STATION_ID, ipparam, 0, VENDOR_NONE);
462 /* Add user specified vp's */
464 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
467 * make authentication with RADIUS server
470 if (rstate.authserver) {
471 result = rc_auth_using_server(rstate.authserver,
472 rstate.client_port, send,
473 &received, radius_msg, req_info);
475 result = rc_auth(rstate.client_port, send, &received, radius_msg,
479 strlcpy(message, radius_msg, message_space);
481 if (result == OK_RC) {
482 if (!rstate.done_chap_once) {
483 if (radius_setparams(received, radius_msg, req_info, digest,
484 challenge, message, message_space) < 0) {
485 error("%s", radius_msg);
488 rstate.done_chap_once = 1;
493 rc_avpair_free(received);
494 rc_avpair_free (send);
495 return (result == OK_RC);
498 /**********************************************************************
499 * %FUNCTION: make_username_realm
501 * user -- the user given to pppd
505 * Copies user into rstate.user. If it lacks a realm (no "@domain" part),
506 * then the default realm from the radiusclient config file is added.
507 ***********************************************************************/
509 make_username_realm(char *user)
513 if ( user != NULL ) {
514 strlcpy(rstate.user, user, sizeof(rstate.user));
519 default_realm = rc_conf_str("default_realm");
521 if (!strchr(rstate.user, '@') &&
523 (*default_realm != '\0')) {
524 strlcat(rstate.user, "@", sizeof(rstate.user));
525 strlcat(rstate.user, default_realm, sizeof(rstate.user));
529 /**********************************************************************
530 * %FUNCTION: radius_setparams
532 * vp -- received value-pairs
533 * msg -- buffer in which to place error message. Holds up to BUF_LEN chars
535 * >= 0 on success; -1 on failure
537 * Parses attributes sent by RADIUS server and sets them in pppd.
538 ***********************************************************************/
540 radius_setparams(VALUE_PAIR *vp, char *msg, REQUEST_INFO *req_info,
541 struct chap_digest_type *digest, unsigned char *challenge,
542 char *message, int message_space)
545 int ms_chap2_success = 0;
547 int mppe_enc_keys = 0; /* whether or not these were received */
548 int mppe_enc_policy = 0;
549 int mppe_enc_types = 0;
552 ipcp_options *wo = &ipcp_wantoptions[0];
553 ipcp_options *ao = &ipcp_allowoptions[0];
560 /* Send RADIUS attributes to anyone else who might be interested */
561 if (radius_attributes_hook) {
562 (*radius_attributes_hook)(vp);
566 * service type (if not framed then quit),
567 * new IP address (RADIUS can define static IP for some users),
571 if (vp->vendorcode == VENDOR_NONE) {
572 switch (vp->attribute) {
573 case PW_SERVICE_TYPE:
574 /* check for service type */
575 /* if not FRAMED then exit */
576 if (vp->lvalue != PW_FRAMED) {
577 slprintf(msg, BUF_LEN, "RADIUS: wrong service type %ld for %s",
578 vp->lvalue, rstate.user);
583 case PW_FRAMED_PROTOCOL:
584 /* check for framed protocol type */
585 /* if not PPP then also exit */
586 if (vp->lvalue != PW_PPP) {
587 slprintf(msg, BUF_LEN, "RADIUS: wrong framed protocol %ld for %s",
588 vp->lvalue, rstate.user);
593 case PW_SESSION_TIMEOUT:
594 /* Session timeout */
595 maxconnect = vp->lvalue;
598 /* packet filter, will be handled via ip-(up|down) script */
599 script_setenv("RADIUS_FILTER_ID", (char*) vp->strvalue, 1);
601 case PW_FRAMED_ROUTE:
602 /* route, will be handled via ip-(up|down) script */
603 script_setenv("RADIUS_FRAMED_ROUTE", (char*) vp->strvalue, 1);
605 case PW_IDLE_TIMEOUT:
607 idle_time_limit = vp->lvalue;
609 #ifdef PPP_WITH_MAXOCTETS
610 case PW_SESSION_OCTETS_LIMIT:
611 /* Session traffic limit */
612 maxoctets = vp->lvalue;
614 case PW_OCTETS_DIRECTION:
615 /* Session traffic limit direction check */
616 maxoctets_dir = ( vp->lvalue > 4 ) ? 0 : vp->lvalue ;
619 case PW_ACCT_INTERIM_INTERVAL:
620 /* Send accounting updates every few seconds */
621 rstate.acct_interim_interval = vp->lvalue;
622 /* RFC says it MUST NOT be less than 60 seconds */
623 /* We use "0" to signify not sending updates */
624 if (rstate.acct_interim_interval &&
625 rstate.acct_interim_interval < 60) {
626 rstate.acct_interim_interval = 60;
629 case PW_FRAMED_IP_ADDRESS:
630 /* seting up remote IP addresses */
632 if (remote == 0xffffffff) {
633 /* 0xffffffff means user should be allowed to select one */
634 rstate.any_ip_addr_ok = 1;
635 } else if (remote != 0xfffffffe) {
636 /* 0xfffffffe means NAS should select an ip address */
637 remote = htonl(vp->lvalue);
638 if (bad_ip_adrs (remote)) {
639 slprintf(msg, BUF_LEN, "RADIUS: bad remote IP address %I for %s",
640 remote, rstate.user);
643 rstate.choose_ip = 1;
644 rstate.ip_addr = remote;
647 case PW_NAS_IP_ADDRESS:
648 wo->ouraddr = htonl(vp->lvalue);
651 /* Save Class attribute to pass it in accounting request */
652 if (vp->lvalue <= MAXCLASSLEN) {
653 rstate.class_len=vp->lvalue;
654 memcpy(rstate.class, vp->strvalue, rstate.class_len);
655 } /* else too big for our buffer - ignore it */
658 netif_set_mtu(rstate.client_port,MIN(netif_get_mtu(rstate.client_port),vp->lvalue));
663 } else if (vp->vendorcode == VENDOR_MICROSOFT) {
664 #ifdef PPP_WITH_CHAPMS
665 switch (vp->attribute) {
666 case PW_MS_CHAP2_SUCCESS:
667 if ((vp->lvalue != 43) || strncmp((char*) vp->strvalue + 1, "S=", 2)) {
668 slprintf(msg,BUF_LEN,"RADIUS: bad MS-CHAP2-Success packet");
672 strlcpy(message, (char*) vp->strvalue + 1, message_space);
673 ms_chap2_success = 1;
677 case PW_MS_CHAP_MPPE_KEYS:
678 if (radius_setmppekeys(vp, req_info, challenge) < 0) {
679 slprintf(msg, BUF_LEN,
680 "RADIUS: bad MS-CHAP-MPPE-Keys attribute");
686 case PW_MS_MPPE_SEND_KEY:
687 case PW_MS_MPPE_RECV_KEY:
688 if (radius_setmppekeys2(vp, req_info) < 0) {
689 slprintf(msg, BUF_LEN,
690 "RADIUS: bad MS-MPPE-%s-Key attribute",
691 (vp->attribute == PW_MS_MPPE_SEND_KEY)?
698 case PW_MS_MPPE_ENCRYPTION_POLICY:
699 mppe_enc_policy = vp->lvalue; /* save for later */
702 case PW_MS_MPPE_ENCRYPTION_TYPES:
703 mppe_enc_types = vp->lvalue; /* save for later */
706 #endif /* PPP_WITH_MPPE */
708 case PW_MS_PRIMARY_DNS_SERVER:
709 ao->dnsaddr[0] = htonl(vp->lvalue);
712 ao->dnsaddr[1] = ao->dnsaddr[0];
714 case PW_MS_SECONDARY_DNS_SERVER:
715 ao->dnsaddr[1] = htonl(vp->lvalue);
718 ao->dnsaddr[0] = ao->dnsaddr[1];
720 case PW_MS_PRIMARY_NBNS_SERVER:
721 ao->winsaddr[0] = htonl(vp->lvalue);
724 ao->winsaddr[1] = ao->winsaddr[0];
726 case PW_MS_SECONDARY_NBNS_SERVER:
727 ao->winsaddr[1] = htonl(vp->lvalue);
730 ao->winsaddr[0] = ao->winsaddr[1];
734 #endif /* PPP_WITH_CHAPMS */
739 /* Require a valid MS-CHAP2-SUCCESS for MS-CHAPv2 auth */
740 if (digest && (digest->code == CHAP_MICROSOFT_V2) && !ms_chap2_success)
745 * Require both policy and key attributes to indicate a valid key.
746 * Note that if the policy value was '0' we don't set the key!
748 if (mppe_enc_policy && mppe_enc_keys) {
749 /* Set/modify allowed encryption types. */
751 mppe_set_enc_types(mppe_enc_policy, mppe_enc_types);
761 /**********************************************************************
762 * %FUNCTION: radius_setmppekeys
764 * vp -- value pair holding MS-CHAP-MPPE-KEYS attribute
765 * req_info -- radius request information used for encryption
767 * >= 0 on success; -1 on failure
769 * Decrypt the "key" provided by the RADIUS server for MPPE encryption.
771 ***********************************************************************/
773 radius_setmppekeys(VALUE_PAIR *vp, REQUEST_INFO *req_info,
774 unsigned char *challenge)
781 if (vp->lvalue != 32) {
782 error("RADIUS: Incorrect attribute length (%d) for MS-CHAP-MPPE-Keys",
787 memcpy(plain, vp->strvalue, sizeof(plain));
790 MD5_Update(&Context, req_info->secret, strlen(req_info->secret));
791 MD5_Update(&Context, req_info->request_vector, AUTH_VECTOR_LEN);
792 MD5_Final(buf, &Context);
794 for (i = 0; i < 16; i++)
798 MD5_Update(&Context, req_info->secret, strlen(req_info->secret));
799 MD5_Update(&Context, vp->strvalue, 16);
800 MD5_Final(buf, &Context);
802 for(i = 0; i < 16; i++)
803 plain[i + 16] ^= buf[i];
806 * Annoying. The "key" returned is just the NTPasswordHashHash, which
807 * the NAS (us) doesn't need; we only need the start key. So we have
808 * to generate the start key, sigh. NB: We do not support the LM-Key.
810 mppe_set_chapv1(challenge, &plain[8]);
815 /**********************************************************************
816 * %FUNCTION: radius_setmppekeys2
818 * vp -- value pair holding MS-MPPE-SEND-KEY or MS-MPPE-RECV-KEY attribute
819 * req_info -- radius request information used for encryption
821 * >= 0 on success; -1 on failure
823 * Decrypt the key provided by the RADIUS server for MPPE encryption.
825 ***********************************************************************/
827 radius_setmppekeys2(VALUE_PAIR *vp, REQUEST_INFO *req_info)
831 u_char *salt = vp->strvalue;
832 u_char *crypt = vp->strvalue + 2;
834 u_char buf[MD5_HASH_SIZE];
837 if (vp->attribute == PW_MS_MPPE_RECV_KEY)
840 if (vp->lvalue != 34) {
841 error("RADIUS: Incorrect attribute length (%d) for MS-MPPE-%s-Key",
846 if ((salt[0] & 0x80) == 0) {
847 error("RADIUS: Illegal salt value for MS-MPPE-%s-Key attribute", type);
851 memcpy(plain, crypt, 32);
854 MD5_Update(&Context, req_info->secret, strlen(req_info->secret));
855 MD5_Update(&Context, req_info->request_vector, AUTH_VECTOR_LEN);
856 MD5_Update(&Context, salt, 2);
857 MD5_Final(buf, &Context);
859 for (i = 0; i < 16; i++)
862 if (plain[0] != 16) {
863 error("RADIUS: Incorrect key length (%d) for MS-MPPE-%s-Key attribute",
864 (int) plain[0], type);
869 MD5_Update(&Context, req_info->secret, strlen(req_info->secret));
870 MD5_Update(&Context, crypt, 16);
871 MD5_Final(buf, &Context);
873 plain[16] ^= buf[0]; /* only need the first byte */
875 if (vp->attribute == PW_MS_MPPE_SEND_KEY)
876 mppe_set_keys(plain + 1, NULL, 16);
878 mppe_set_keys(NULL, plain + 1, 16);
882 #endif /* PPP_WITH_MPPE */
884 /**********************************************************************
885 * %FUNCTION: radius_acct_start
891 * Sends a "start" accounting message to the RADIUS server.
892 ***********************************************************************/
894 radius_acct_start(void)
898 VALUE_PAIR *send = NULL;
899 ipcp_options *ho = &ipcp_hisoptions[0];
902 if (!rstate.initialized) {
906 rstate.start_time = time(NULL);
908 strlcpy(rstate.session_id, rc_mksid(), MAXSESSIONID);
910 rc_avpair_add(&send, PW_ACCT_SESSION_ID,
911 rstate.session_id, 0, VENDOR_NONE);
912 rc_avpair_add(&send, PW_USER_NAME,
913 rstate.user, 0, VENDOR_NONE);
915 if (rstate.class_len > 0)
916 rc_avpair_add(&send, PW_CLASS,
917 rstate.class, rstate.class_len, VENDOR_NONE);
919 av_type = PW_STATUS_START;
920 rc_avpair_add(&send, PW_ACCT_STATUS_TYPE, &av_type, 0, VENDOR_NONE);
923 rc_avpair_add(&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
926 rc_avpair_add(&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
928 if (*remote_number) {
929 rc_avpair_add(&send, PW_CALLING_STATION_ID,
930 remote_number, 0, VENDOR_NONE);
932 rc_avpair_add(&send, PW_CALLING_STATION_ID, ipparam, 0, VENDOR_NONE);
935 rc_avpair_add(&send, PW_ACCT_AUTHENTIC, &av_type, 0, VENDOR_NONE);
938 av_type = ( using_pty ? PW_VIRTUAL : ( sync_serial ? PW_SYNC : PW_ASYNC ) );
939 rc_avpair_add(&send, PW_NAS_PORT_TYPE, &av_type, 0, VENDOR_NONE);
941 hisaddr = ho->hisaddr;
942 av_type = htonl(hisaddr);
943 rc_avpair_add(&send, PW_FRAMED_IP_ADDRESS , &av_type , 0, VENDOR_NONE);
945 /* Add user specified vp's */
947 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
949 if (rstate.acctserver) {
950 result = rc_acct_using_server(rstate.acctserver,
951 rstate.client_port, send);
953 result = rc_acct(rstate.client_port, send);
956 rc_avpair_free(send);
958 if (result != OK_RC) {
959 /* RADIUS server could be down so make this a warning */
961 "Accounting START failed for %s", rstate.user);
964 /* Kick off periodic accounting reports */
965 if (rstate.acct_interim_interval) {
966 TIMEOUT(radius_acct_interim, NULL, rstate.acct_interim_interval);
970 /**********************************************************************
971 * %FUNCTION: radius_acct_stop
977 * Sends a "stop" accounting message to the RADIUS server.
978 ***********************************************************************/
980 radius_acct_stop(void)
983 VALUE_PAIR *send = NULL;
984 ipcp_options *ho = &ipcp_hisoptions[0];
988 if (!rstate.initialized) {
992 if (rstate.acct_interim_interval)
993 UNTIMEOUT(radius_acct_interim, NULL);
995 rc_avpair_add(&send, PW_ACCT_SESSION_ID, rstate.session_id,
998 rc_avpair_add(&send, PW_USER_NAME, rstate.user, 0, VENDOR_NONE);
1000 if (rstate.class_len > 0)
1001 rc_avpair_add(&send, PW_CLASS,
1002 rstate.class, rstate.class_len, VENDOR_NONE);
1004 av_type = PW_STATUS_STOP;
1005 rc_avpair_add(&send, PW_ACCT_STATUS_TYPE, &av_type, 0, VENDOR_NONE);
1007 av_type = PW_FRAMED;
1008 rc_avpair_add(&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
1011 rc_avpair_add(&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
1013 av_type = PW_RADIUS;
1014 rc_avpair_add(&send, PW_ACCT_AUTHENTIC, &av_type, 0, VENDOR_NONE);
1017 if (link_stats_valid) {
1018 av_type = link_connect_time;
1019 rc_avpair_add(&send, PW_ACCT_SESSION_TIME, &av_type, 0, VENDOR_NONE);
1021 av_type = link_stats.bytes_out & 0xFFFFFFFF;
1022 rc_avpair_add(&send, PW_ACCT_OUTPUT_OCTETS, &av_type, 0, VENDOR_NONE);
1024 if (link_stats.bytes_out > 0xFFFFFFFF) {
1025 av_type = link_stats.bytes_out >> 32;
1026 rc_avpair_add(&send, PW_ACCT_OUTPUT_GIGAWORDS, &av_type, 0, VENDOR_NONE);
1029 av_type = link_stats.bytes_in & 0xFFFFFFFF;
1030 rc_avpair_add(&send, PW_ACCT_INPUT_OCTETS, &av_type, 0, VENDOR_NONE);
1032 if (link_stats.bytes_in > 0xFFFFFFFF) {
1033 av_type = link_stats.bytes_in >> 32;
1034 rc_avpair_add(&send, PW_ACCT_INPUT_GIGAWORDS, &av_type, 0, VENDOR_NONE);
1037 av_type = link_stats.pkts_out;
1038 rc_avpair_add(&send, PW_ACCT_OUTPUT_PACKETS, &av_type, 0, VENDOR_NONE);
1040 av_type = link_stats.pkts_in;
1041 rc_avpair_add(&send, PW_ACCT_INPUT_PACKETS, &av_type, 0, VENDOR_NONE);
1044 if (*remote_number) {
1045 rc_avpair_add(&send, PW_CALLING_STATION_ID,
1046 remote_number, 0, VENDOR_NONE);
1048 rc_avpair_add(&send, PW_CALLING_STATION_ID, ipparam, 0, VENDOR_NONE);
1050 av_type = ( using_pty ? PW_VIRTUAL : ( sync_serial ? PW_SYNC : PW_ASYNC ) );
1051 rc_avpair_add(&send, PW_NAS_PORT_TYPE, &av_type, 0, VENDOR_NONE);
1053 av_type = PW_NAS_ERROR;
1056 case EXIT_USER_REQUEST:
1057 av_type = PW_USER_REQUEST;
1061 case EXIT_PEER_DEAD:
1062 case EXIT_CONNECT_FAILED:
1063 av_type = PW_LOST_CARRIER;
1066 case EXIT_INIT_FAILED:
1067 case EXIT_OPEN_FAILED:
1068 case EXIT_LOCK_FAILED:
1069 case EXIT_PTYCMD_FAILED:
1070 av_type = PW_PORT_ERROR;
1073 case EXIT_PEER_AUTH_FAILED:
1074 case EXIT_AUTH_TOPEER_FAILED:
1075 case EXIT_NEGOTIATION_FAILED:
1076 case EXIT_CNID_AUTH_FAILED:
1077 av_type = PW_SERVICE_UNAVAILABLE;
1080 case EXIT_IDLE_TIMEOUT:
1081 av_type = PW_ACCT_IDLE_TIMEOUT;
1085 av_type = PW_CALLBACK;
1088 case EXIT_CONNECT_TIME:
1089 av_type = PW_ACCT_SESSION_TIMEOUT;
1092 #ifdef PPP_WITH_MAXOCTETS
1093 case EXIT_TRAFFIC_LIMIT:
1094 av_type = PW_NAS_REQUEST;
1099 av_type = PW_NAS_ERROR;
1102 rc_avpair_add(&send, PW_ACCT_TERMINATE_CAUSE, &av_type, 0, VENDOR_NONE);
1104 hisaddr = ho->hisaddr;
1105 av_type = htonl(hisaddr);
1106 rc_avpair_add(&send, PW_FRAMED_IP_ADDRESS , &av_type , 0, VENDOR_NONE);
1108 /* Add user specified vp's */
1110 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
1112 if (rstate.acctserver) {
1113 result = rc_acct_using_server(rstate.acctserver,
1114 rstate.client_port, send);
1116 result = rc_acct(rstate.client_port, send);
1119 if (result != OK_RC) {
1120 /* RADIUS server could be down so make this a warning */
1122 "Accounting STOP failed for %s", rstate.user);
1124 rc_avpair_free(send);
1127 /**********************************************************************
1128 * %FUNCTION: radius_acct_interim
1134 * Sends an interim accounting message to the RADIUS server
1135 ***********************************************************************/
1137 radius_acct_interim(void *ignored)
1140 VALUE_PAIR *send = NULL;
1141 ipcp_options *ho = &ipcp_hisoptions[0];
1145 if (!rstate.initialized) {
1149 rc_avpair_add(&send, PW_ACCT_SESSION_ID, rstate.session_id,
1152 rc_avpair_add(&send, PW_USER_NAME, rstate.user, 0, VENDOR_NONE);
1154 if (rstate.class_len > 0)
1155 rc_avpair_add(&send, PW_CLASS,
1156 rstate.class, rstate.class_len, VENDOR_NONE);
1158 av_type = PW_STATUS_ALIVE;
1159 rc_avpair_add(&send, PW_ACCT_STATUS_TYPE, &av_type, 0, VENDOR_NONE);
1161 av_type = PW_FRAMED;
1162 rc_avpair_add(&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
1165 rc_avpair_add(&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
1167 av_type = PW_RADIUS;
1168 rc_avpair_add(&send, PW_ACCT_AUTHENTIC, &av_type, 0, VENDOR_NONE);
1170 /* Update link stats */
1171 update_link_stats(0);
1173 if (link_stats_valid) {
1174 link_stats_valid = 0; /* Force later code to update */
1176 av_type = link_connect_time;
1177 rc_avpair_add(&send, PW_ACCT_SESSION_TIME, &av_type, 0, VENDOR_NONE);
1179 av_type = link_stats.bytes_out & 0xFFFFFFFF;
1180 rc_avpair_add(&send, PW_ACCT_OUTPUT_OCTETS, &av_type, 0, VENDOR_NONE);
1182 if (link_stats.bytes_out > 0xFFFFFFFF) {
1183 av_type = link_stats.bytes_out >> 32;
1184 rc_avpair_add(&send, PW_ACCT_OUTPUT_GIGAWORDS, &av_type, 0, VENDOR_NONE);
1187 av_type = link_stats.bytes_in & 0xFFFFFFFF;
1188 rc_avpair_add(&send, PW_ACCT_INPUT_OCTETS, &av_type, 0, VENDOR_NONE);
1190 if (link_stats.bytes_in > 0xFFFFFFFF) {
1191 av_type = link_stats.bytes_in >> 32;
1192 rc_avpair_add(&send, PW_ACCT_INPUT_GIGAWORDS, &av_type, 0, VENDOR_NONE);
1195 av_type = link_stats.pkts_out;
1196 rc_avpair_add(&send, PW_ACCT_OUTPUT_PACKETS, &av_type, 0, VENDOR_NONE);
1198 av_type = link_stats.pkts_in;
1199 rc_avpair_add(&send, PW_ACCT_INPUT_PACKETS, &av_type, 0, VENDOR_NONE);
1202 if (*remote_number) {
1203 rc_avpair_add(&send, PW_CALLING_STATION_ID,
1204 remote_number, 0, VENDOR_NONE);
1206 rc_avpair_add(&send, PW_CALLING_STATION_ID, ipparam, 0, VENDOR_NONE);
1208 av_type = ( using_pty ? PW_VIRTUAL : ( sync_serial ? PW_SYNC : PW_ASYNC ) );
1209 rc_avpair_add(&send, PW_NAS_PORT_TYPE, &av_type, 0, VENDOR_NONE);
1211 hisaddr = ho->hisaddr;
1212 av_type = htonl(hisaddr);
1213 rc_avpair_add(&send, PW_FRAMED_IP_ADDRESS , &av_type , 0, VENDOR_NONE);
1215 /* Add user specified vp's */
1217 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
1219 if (rstate.acctserver) {
1220 result = rc_acct_using_server(rstate.acctserver,
1221 rstate.client_port, send);
1223 result = rc_acct(rstate.client_port, send);
1226 if (result != OK_RC) {
1227 /* RADIUS server could be down so make this a warning */
1229 "Interim accounting failed for %s", rstate.user);
1231 rc_avpair_free(send);
1233 /* Schedule another one */
1234 TIMEOUT(radius_acct_interim, NULL, rstate.acct_interim_interval);
1237 /**********************************************************************
1238 * %FUNCTION: radius_ip_up
1245 * Called when IPCP is up. We'll do a start-accounting record.
1246 ***********************************************************************/
1248 radius_ip_up(void *opaque, int arg)
1250 radius_acct_start();
1253 /**********************************************************************
1254 * %FUNCTION: radius_ip_down
1261 * Called when IPCP is down. We'll do a stop-accounting record.
1262 ***********************************************************************/
1264 radius_ip_down(void *opaque, int arg)
1269 /**********************************************************************
1270 * %FUNCTION: radius_init
1272 * msg -- buffer of size BUF_LEN for error message
1274 * negative on failure; non-negative on success
1276 * Initializes radiusclient library
1277 ***********************************************************************/
1279 radius_init(char *msg)
1281 if (rstate.initialized) {
1285 if (config_file && *config_file) {
1286 strlcpy(rstate.config_file, config_file, MAXPATHLEN-1);
1289 rstate.initialized = 1;
1291 if (rc_read_config(rstate.config_file) != 0) {
1292 slprintf(msg, BUF_LEN, "RADIUS: Can't read config file %s",
1293 rstate.config_file);
1297 if (rc_read_dictionary(rc_conf_str("dictionary")) != 0) {
1298 slprintf(msg, BUF_LEN, "RADIUS: Can't read dictionary file %s",
1299 rc_conf_str("dictionary"));
1303 if (rc_read_mapfile(rc_conf_str("mapfile")) != 0) {
1304 slprintf(msg, BUF_LEN, "RADIUS: Can't read map file %s",
1305 rc_conf_str("mapfile"));
1309 /* Add av pairs saved during option parsing */
1311 struct avpopt *n = avpopt->next;
1313 rc_avpair_parse(avpopt->vpstr, &rstate.avp);
1314 free(avpopt->vpstr);
1321 /**********************************************************************
1322 * %FUNCTION: get_client_port
1324 * ifname -- PPP interface name (e.g. "ppp7")
1326 * The NAS port number (e.g. 7)
1328 * Extracts the port number from the interface name
1329 ***********************************************************************/
1331 get_client_port(char *ifname)
1334 if (sscanf(ifname, "ppp%d", &port) == 1) {
1337 return rc_map2id(ifname);
1340 /**********************************************************************
1341 * %FUNCTION: radius_allowed_address
1343 * addr -- IP address
1345 * 1 if we're allowed to use that IP address; 0 if not; -1 if we do
1347 ***********************************************************************/
1349 radius_allowed_address(u_int32_t addr)
1351 ipcp_options *wo = &ipcp_wantoptions[0];
1353 if (!rstate.choose_ip) {
1354 /* If RADIUS server said any address is OK, then fine... */
1355 if (rstate.any_ip_addr_ok) {
1359 /* Sigh... if an address was supplied for remote host in pppd
1360 options, it has to match that. */
1361 if (wo->hisaddr != 0 && wo->hisaddr == addr) {
1367 if (addr == rstate.ip_addr) return 1;
1371 /* Useful for other plugins */
1372 char *radius_logged_in_user(void)