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>
43 #include <pppd/ppp-crypto.h>
47 #include <pppd/ipcp.h>
49 #include "radiusclient.h"
55 static char *config_file = NULL;
56 static int add_avp(char **);
57 static struct avpopt {
61 static bool portnummap = 0;
63 static option_t Options[] = {
64 { "radius-config-file", o_string, &config_file },
65 { "avpair", o_special, add_avp },
66 { "map-to-ttyname", o_bool, &portnummap,
67 "Set Radius NAS-Port attribute value via libradiusclient library", OPT_PRIO | 1 },
68 { "map-to-ifname", o_bool, &portnummap,
69 "Set Radius NAS-Port attribute to number as in interface name (Default)", OPT_PRIOSUB | 0 },
73 static int radius_secret_check(void);
74 static int radius_pap_auth(char *user,
77 struct wordlist **paddrs,
78 struct wordlist **popts);
79 static int radius_chap_verify(char *user, char *ourname, int id,
80 struct chap_digest_type *digest,
81 unsigned char *challenge,
82 unsigned char *response,
83 char *message, int message_space);
85 static void radius_ip_up(void *opaque, int arg);
86 static void radius_ip_down(void *opaque, int arg);
87 static void make_username_realm(char *user);
88 static int radius_setparams(VALUE_PAIR *vp, char *msg, REQUEST_INFO *req_info,
89 struct chap_digest_type *digest,
90 unsigned char *challenge,
91 char *message, int message_space);
92 static void radius_choose_ip(u_int32_t *addrp);
93 static int radius_init(char *msg);
94 static int get_client_port(char *ifname);
95 static int radius_allowed_address(u_int32_t addr);
96 static void radius_acct_interim(void *);
98 static int radius_setmppekeys(VALUE_PAIR *vp, REQUEST_INFO *req_info,
100 static int radius_setmppekeys2(VALUE_PAIR *vp, REQUEST_INFO *req_info);
104 #define MAXSESSIONID 32
108 #define MAXCLASSLEN 500
111 struct radius_state {
118 char user[MAXNAMELEN];
119 char config_file[MAXPATHLEN];
120 char session_id[MAXSESSIONID + 1];
122 int acct_interim_interval;
123 SERVER *authserver; /* Authentication server to use */
124 SERVER *acctserver; /* Accounting server to use */
126 char class[MAXCLASSLEN];
127 VALUE_PAIR *avp; /* Additional (user supplied) vp's to send to server */
130 void (*radius_attributes_hook)(VALUE_PAIR *) = NULL;
132 /* The pre_auth_hook MAY set authserver and acctserver if it wants.
133 In that case, they override the values in the radiusclient.conf file */
134 void (*radius_pre_auth_hook)(char const *user,
136 SERVER **acctserver) = NULL;
138 static struct radius_state rstate;
140 char pppd_version[] = PPPD_VERSION;
142 /**********************************************************************
143 * %FUNCTION: plugin_init
149 * Initializes RADIUS plugin.
150 ***********************************************************************/
154 pap_check_hook = radius_secret_check;
155 pap_auth_hook = radius_pap_auth;
157 chap_check_hook = radius_secret_check;
158 chap_verify_hook = radius_chap_verify;
160 ip_choose_hook = radius_choose_ip;
161 allowed_address_hook = radius_allowed_address;
163 add_notifier(&ip_up_notifier, radius_ip_up, NULL);
164 add_notifier(&ip_down_notifier, radius_ip_down, NULL);
166 memset(&rstate, 0, sizeof(rstate));
168 strlcpy(rstate.config_file, "/etc/radiusclient/radiusclient.conf",
169 sizeof(rstate.config_file));
171 add_options(Options);
173 info("RADIUS plugin initialized.");
176 /**********************************************************************
179 * argv -- the <attribute=value> pair to add
183 * Adds an av pair to be passed on to the RADIUS server on each request.
184 ***********************************************************************/
188 struct avpopt *p = malloc(sizeof(struct avpopt));
190 /* Append to a list of vp's for later parsing */
191 p->vpstr = strdup(*argv);
198 /**********************************************************************
199 * %FUNCTION: radius_secret_check
203 * 1 -- we are ALWAYS willing to supply a secret. :-)
205 * Tells pppd that we will try to authenticate the peer, and not to
206 * worry about looking in *-secrets file(s)
207 ***********************************************************************/
209 radius_secret_check(void)
214 /**********************************************************************
215 * %FUNCTION: radius_choose_ip
217 * addrp -- where to store the IP address
221 * If RADIUS server has specified an IP address, it is stored in *addrp.
222 ***********************************************************************/
224 radius_choose_ip(u_int32_t *addrp)
226 if (rstate.choose_ip) {
227 *addrp = rstate.ip_addr;
231 /**********************************************************************
232 * %FUNCTION: radius_pap_auth
234 * user -- user-name of peer
235 * passwd -- password supplied by peer
236 * msgp -- Message which will be sent in PAP response
237 * paddrs -- set to a list of possible peer IP addresses
238 * popts -- set to a list of additional pppd options
240 * 1 if we can authenticate, -1 if we cannot.
242 * Performs PAP authentication using RADIUS
243 ***********************************************************************/
245 radius_pap_auth(char *user,
248 struct wordlist **paddrs,
249 struct wordlist **popts)
251 VALUE_PAIR *send, *received;
254 static char radius_msg[BUF_LEN];
259 if (radius_init(radius_msg) < 0) {
263 /* Put user with potentially realm added in rstate.user */
264 make_username_realm(user);
266 if (radius_pre_auth_hook) {
267 radius_pre_auth_hook(rstate.user,
275 /* Hack... the "port" is the ppp interface number. Should really be
277 rstate.client_port = get_client_port(portnummap ? devnam : ifname);
280 rc_avpair_add(&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
283 rc_avpair_add(&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
285 rc_avpair_add(&send, PW_USER_NAME, rstate.user , 0, VENDOR_NONE);
286 rc_avpair_add(&send, PW_USER_PASSWORD, passwd, 0, VENDOR_NONE);
287 if (*remote_number) {
288 rc_avpair_add(&send, PW_CALLING_STATION_ID, remote_number, 0,
291 rc_avpair_add(&send, PW_CALLING_STATION_ID, ipparam, 0, VENDOR_NONE);
293 /* Add user specified vp's */
295 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
297 if (rstate.authserver) {
298 result = rc_auth_using_server(rstate.authserver,
299 rstate.client_port, send,
300 &received, radius_msg, NULL);
302 result = rc_auth(rstate.client_port, send, &received, radius_msg, NULL);
305 if (result == OK_RC) {
306 if (radius_setparams(received, radius_msg, NULL, NULL, NULL, NULL, 0) < 0) {
311 /* free value pairs */
312 rc_avpair_free(received);
313 rc_avpair_free(send);
315 return (result == OK_RC) ? 1 : 0;
318 /**********************************************************************
319 * %FUNCTION: radius_chap_verify
321 * user -- name of the peer
322 * ourname -- name for this machine
323 * id -- the ID byte in the challenge
324 * digest -- points to the structure representing the digest type
325 * challenge -- the challenge string we sent (length in first byte)
326 * response -- the response (hash) the peer sent back (length in 1st byte)
327 * message -- space for a message to be returned to the peer
328 * message_space -- number of bytes available at *message.
330 * 1 if the response is good, 0 if it is bad
332 * Performs CHAP, MS-CHAP and MS-CHAPv2 authentication using RADIUS.
333 ***********************************************************************/
335 radius_chap_verify(char *user, char *ourname, int id,
336 struct chap_digest_type *digest,
337 unsigned char *challenge, unsigned char *response,
338 char *message, int message_space)
340 VALUE_PAIR *send, *received;
342 static char radius_msg[BUF_LEN];
344 int challenge_len, response_len;
345 u_char cpassword[MAX_RESPONSE_LEN + 1];
347 /* Need the RADIUS secret and Request Authenticator to decode MPPE */
348 REQUEST_INFO request_info, *req_info = &request_info;
350 REQUEST_INFO *req_info = NULL;
353 challenge_len = *challenge++;
354 response_len = *response++;
358 if (radius_init(radius_msg) < 0) {
359 error("%s", radius_msg);
363 /* return error for types we can't handle */
364 if ((digest->code != CHAP_MD5)
365 #ifdef PPP_WITH_CHAPMS
366 && (digest->code != CHAP_MICROSOFT)
367 && (digest->code != CHAP_MICROSOFT_V2)
370 error("RADIUS: Challenge type %u unsupported", digest->code);
374 /* Put user with potentially realm added in rstate.user */
375 if (!rstate.done_chap_once) {
376 make_username_realm(user);
377 rstate.client_port = get_client_port (portnummap ? devnam : ifname);
378 if (radius_pre_auth_hook) {
379 radius_pre_auth_hook(rstate.user,
385 send = received = NULL;
388 rc_avpair_add (&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
391 rc_avpair_add (&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
393 rc_avpair_add (&send, PW_USER_NAME, rstate.user , 0, VENDOR_NONE);
396 * add the challenge and response fields
398 switch (digest->code) {
400 /* CHAP-Challenge and CHAP-Password */
401 if (response_len != MD5_DIGEST_LENGTH)
404 memcpy(&cpassword[1], response, MD5_DIGEST_LENGTH);
406 rc_avpair_add(&send, PW_CHAP_CHALLENGE,
407 challenge, challenge_len, VENDOR_NONE);
408 rc_avpair_add(&send, PW_CHAP_PASSWORD,
409 cpassword, MD5_DIGEST_LENGTH + 1, VENDOR_NONE);
412 #ifdef PPP_WITH_CHAPMS
415 /* MS-CHAP-Challenge and MS-CHAP-Response */
416 u_char *p = cpassword;
418 if (response_len != MS_CHAP_RESPONSE_LEN)
421 /* The idiots use a different field order in RADIUS than PPP */
422 *p++ = response[MS_CHAP_USENT];
423 memcpy(p, response, MS_CHAP_LANMANRESP_LEN + MS_CHAP_NTRESP_LEN);
425 rc_avpair_add(&send, PW_MS_CHAP_CHALLENGE,
426 challenge, challenge_len, VENDOR_MICROSOFT);
427 rc_avpair_add(&send, PW_MS_CHAP_RESPONSE,
428 cpassword, MS_CHAP_RESPONSE_LEN + 1, VENDOR_MICROSOFT);
432 case CHAP_MICROSOFT_V2:
434 /* MS-CHAP-Challenge and MS-CHAP2-Response */
435 u_char *p = cpassword;
437 if (response_len != MS_CHAP2_RESPONSE_LEN)
440 /* The idiots use a different field order in RADIUS than PPP */
441 *p++ = response[MS_CHAP2_FLAGS];
442 memcpy(p, response, (MS_CHAP2_PEER_CHAL_LEN + MS_CHAP2_RESERVED_LEN
443 + MS_CHAP2_NTRESP_LEN));
445 rc_avpair_add(&send, PW_MS_CHAP_CHALLENGE,
446 challenge, challenge_len, VENDOR_MICROSOFT);
447 rc_avpair_add(&send, PW_MS_CHAP2_RESPONSE,
448 cpassword, MS_CHAP2_RESPONSE_LEN + 1, VENDOR_MICROSOFT);
454 if (*remote_number) {
455 rc_avpair_add(&send, PW_CALLING_STATION_ID, remote_number, 0,
458 rc_avpair_add(&send, PW_CALLING_STATION_ID, ipparam, 0, VENDOR_NONE);
460 /* Add user specified vp's */
462 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
465 * make authentication with RADIUS server
468 if (rstate.authserver) {
469 result = rc_auth_using_server(rstate.authserver,
470 rstate.client_port, send,
471 &received, radius_msg, req_info);
473 result = rc_auth(rstate.client_port, send, &received, radius_msg,
477 strlcpy(message, radius_msg, message_space);
479 if (result == OK_RC) {
480 if (!rstate.done_chap_once) {
481 if (radius_setparams(received, radius_msg, req_info, digest,
482 challenge, message, message_space) < 0) {
483 error("%s", radius_msg);
486 rstate.done_chap_once = 1;
491 rc_avpair_free(received);
492 rc_avpair_free (send);
493 return (result == OK_RC);
496 /**********************************************************************
497 * %FUNCTION: make_username_realm
499 * user -- the user given to pppd
503 * Copies user into rstate.user. If it lacks a realm (no "@domain" part),
504 * then the default realm from the radiusclient config file is added.
505 ***********************************************************************/
507 make_username_realm(char *user)
511 if ( user != NULL ) {
512 strlcpy(rstate.user, user, sizeof(rstate.user));
517 default_realm = rc_conf_str("default_realm");
519 if (!strchr(rstate.user, '@') &&
521 (*default_realm != '\0')) {
522 strlcat(rstate.user, "@", sizeof(rstate.user));
523 strlcat(rstate.user, default_realm, sizeof(rstate.user));
527 /**********************************************************************
528 * %FUNCTION: radius_setparams
530 * vp -- received value-pairs
531 * msg -- buffer in which to place error message. Holds up to BUF_LEN chars
533 * >= 0 on success; -1 on failure
535 * Parses attributes sent by RADIUS server and sets them in pppd.
536 ***********************************************************************/
538 radius_setparams(VALUE_PAIR *vp, char *msg, REQUEST_INFO *req_info,
539 struct chap_digest_type *digest, unsigned char *challenge,
540 char *message, int message_space)
543 int ms_chap2_success = 0;
545 int mppe_enc_keys = 0; /* whether or not these were received */
546 int mppe_enc_policy = 0;
547 int mppe_enc_types = 0;
550 ipcp_options *wo = &ipcp_wantoptions[0];
551 ipcp_options *ao = &ipcp_allowoptions[0];
558 /* Send RADIUS attributes to anyone else who might be interested */
559 if (radius_attributes_hook) {
560 (*radius_attributes_hook)(vp);
564 * service type (if not framed then quit),
565 * new IP address (RADIUS can define static IP for some users),
569 if (vp->vendorcode == VENDOR_NONE) {
570 switch (vp->attribute) {
571 case PW_SERVICE_TYPE:
572 /* check for service type */
573 /* if not FRAMED then exit */
574 if (vp->lvalue != PW_FRAMED) {
575 slprintf(msg, BUF_LEN, "RADIUS: wrong service type %ld for %s",
576 vp->lvalue, rstate.user);
581 case PW_FRAMED_PROTOCOL:
582 /* check for framed protocol type */
583 /* if not PPP then also exit */
584 if (vp->lvalue != PW_PPP) {
585 slprintf(msg, BUF_LEN, "RADIUS: wrong framed protocol %ld for %s",
586 vp->lvalue, rstate.user);
591 case PW_SESSION_TIMEOUT:
592 /* Session timeout */
593 maxconnect = vp->lvalue;
596 /* packet filter, will be handled via ip-(up|down) script */
597 script_setenv("RADIUS_FILTER_ID", (char*) vp->strvalue, 1);
599 case PW_FRAMED_ROUTE:
600 /* route, will be handled via ip-(up|down) script */
601 script_setenv("RADIUS_FRAMED_ROUTE", (char*) vp->strvalue, 1);
603 case PW_IDLE_TIMEOUT:
605 idle_time_limit = vp->lvalue;
607 case PW_SESSION_OCTETS_LIMIT:
608 /* Session traffic limit */
609 maxoctets = vp->lvalue;
611 case PW_OCTETS_DIRECTION:
612 /* Session traffic limit direction check */
613 maxoctets_dir = ( vp->lvalue > 4 ) ? 0 : vp->lvalue ;
615 case PW_ACCT_INTERIM_INTERVAL:
616 /* Send accounting updates every few seconds */
617 rstate.acct_interim_interval = vp->lvalue;
618 /* RFC says it MUST NOT be less than 60 seconds */
619 /* We use "0" to signify not sending updates */
620 if (rstate.acct_interim_interval &&
621 rstate.acct_interim_interval < 60) {
622 rstate.acct_interim_interval = 60;
625 case PW_FRAMED_IP_ADDRESS:
626 /* seting up remote IP addresses */
628 if (remote == 0xffffffff) {
629 /* 0xffffffff means user should be allowed to select one */
630 rstate.any_ip_addr_ok = 1;
631 } else if (remote != 0xfffffffe) {
632 /* 0xfffffffe means NAS should select an ip address */
633 remote = htonl(vp->lvalue);
634 if (bad_ip_adrs (remote)) {
635 slprintf(msg, BUF_LEN, "RADIUS: bad remote IP address %I for %s",
636 remote, rstate.user);
639 rstate.choose_ip = 1;
640 rstate.ip_addr = remote;
643 case PW_NAS_IP_ADDRESS:
644 wo->ouraddr = htonl(vp->lvalue);
647 /* Save Class attribute to pass it in accounting request */
648 if (vp->lvalue <= MAXCLASSLEN) {
649 rstate.class_len=vp->lvalue;
650 memcpy(rstate.class, vp->strvalue, rstate.class_len);
651 } /* else too big for our buffer - ignore it */
654 netif_set_mtu(rstate.client_port,MIN(netif_get_mtu(rstate.client_port),vp->lvalue));
659 } else if (vp->vendorcode == VENDOR_MICROSOFT) {
660 #ifdef PPP_WITH_CHAPMS
661 switch (vp->attribute) {
662 case PW_MS_CHAP2_SUCCESS:
663 if ((vp->lvalue != 43) || strncmp((char*) vp->strvalue + 1, "S=", 2)) {
664 slprintf(msg,BUF_LEN,"RADIUS: bad MS-CHAP2-Success packet");
668 strlcpy(message, (char*) vp->strvalue + 1, message_space);
669 ms_chap2_success = 1;
673 case PW_MS_CHAP_MPPE_KEYS:
674 if (radius_setmppekeys(vp, req_info, challenge) < 0) {
675 slprintf(msg, BUF_LEN,
676 "RADIUS: bad MS-CHAP-MPPE-Keys attribute");
682 case PW_MS_MPPE_SEND_KEY:
683 case PW_MS_MPPE_RECV_KEY:
684 if (radius_setmppekeys2(vp, req_info) < 0) {
685 slprintf(msg, BUF_LEN,
686 "RADIUS: bad MS-MPPE-%s-Key attribute",
687 (vp->attribute == PW_MS_MPPE_SEND_KEY)?
694 case PW_MS_MPPE_ENCRYPTION_POLICY:
695 mppe_enc_policy = vp->lvalue; /* save for later */
698 case PW_MS_MPPE_ENCRYPTION_TYPES:
699 mppe_enc_types = vp->lvalue; /* save for later */
702 #endif /* PPP_WITH_MPPE */
704 case PW_MS_PRIMARY_DNS_SERVER:
705 ao->dnsaddr[0] = htonl(vp->lvalue);
708 ao->dnsaddr[1] = ao->dnsaddr[0];
710 case PW_MS_SECONDARY_DNS_SERVER:
711 ao->dnsaddr[1] = htonl(vp->lvalue);
714 ao->dnsaddr[0] = ao->dnsaddr[1];
716 case PW_MS_PRIMARY_NBNS_SERVER:
717 ao->winsaddr[0] = htonl(vp->lvalue);
720 ao->winsaddr[1] = ao->winsaddr[0];
722 case PW_MS_SECONDARY_NBNS_SERVER:
723 ao->winsaddr[1] = htonl(vp->lvalue);
726 ao->winsaddr[0] = ao->winsaddr[1];
730 #endif /* PPP_WITH_CHAPMS */
735 /* Require a valid MS-CHAP2-SUCCESS for MS-CHAPv2 auth */
736 if (digest && (digest->code == CHAP_MICROSOFT_V2) && !ms_chap2_success)
741 * Require both policy and key attributes to indicate a valid key.
742 * Note that if the policy value was '0' we don't set the key!
744 if (mppe_enc_policy && mppe_enc_keys) {
745 /* Set/modify allowed encryption types. */
747 mppe_set_enc_types(mppe_enc_policy, mppe_enc_types);
757 /**********************************************************************
758 * %FUNCTION: radius_setmppekeys
760 * vp -- value pair holding MS-CHAP-MPPE-KEYS attribute
761 * req_info -- radius request information used for encryption
763 * >= 0 on success; -1 on failure
765 * Decrypt the "key" provided by the RADIUS server for MPPE encryption.
767 ***********************************************************************/
769 radius_setmppekeys(VALUE_PAIR *vp, REQUEST_INFO *req_info,
770 unsigned char *challenge)
775 unsigned char plain[32];
776 unsigned char buf[MD5_DIGEST_LENGTH];
780 if (vp->lvalue != 32) {
781 error("RADIUS: Incorrect attribute length (%d) for MS-CHAP-MPPE-Keys",
786 memcpy(plain, vp->strvalue, sizeof(plain));
788 ctx = PPP_MD_CTX_new();
791 if (PPP_DigestInit(ctx, PPP_md5())) {
793 if (PPP_DigestUpdate(ctx, req_info->secret, strlen(req_info->secret))) {
795 if (PPP_DigestUpdate(ctx, req_info->request_vector, AUTH_VECTOR_LEN)) {
797 buflen = sizeof(buf);
798 if (PPP_DigestFinal(ctx, buf, &buflen)) {
805 PPP_MD_CTX_free(ctx);
810 for (i = 0; i < MD5_DIGEST_LENGTH; i++) {
815 ctx = PPP_MD_CTX_new();
818 if (PPP_DigestInit(ctx, PPP_md5())) {
820 if (PPP_DigestUpdate(ctx, req_info->secret, strlen(req_info->secret))) {
822 if (PPP_DigestUpdate(ctx, vp->strvalue, 16)) {
824 buflen = MD5_DIGEST_LENGTH;
825 if (PPP_DigestFinal(ctx, buf, &buflen)) {
832 PPP_MD_CTX_free(ctx);
837 for(i = 0; i < MD5_DIGEST_LENGTH; i++) {
838 plain[i + 16] ^= buf[i];
842 * Annoying. The "key" returned is just the NTPasswordHashHash, which
843 * the NAS (us) doesn't need; we only need the start key. So we have
844 * to generate the start key, sigh. NB: We do not support the LM-Key.
846 mppe_set_chapv1(challenge, &plain[8]);
854 /**********************************************************************
855 * %FUNCTION: radius_setmppekeys2
857 * vp -- value pair holding MS-MPPE-SEND-KEY or MS-MPPE-RECV-KEY attribute
858 * req_info -- radius request information used for encryption
860 * >= 0 on success; -1 on failure
862 * Decrypt the key provided by the RADIUS server for MPPE encryption.
864 ***********************************************************************/
866 radius_setmppekeys2(VALUE_PAIR *vp, REQUEST_INFO *req_info)
871 unsigned char *salt = vp->strvalue;
872 unsigned char *crypt = vp->strvalue + 2;
873 unsigned char plain[32];
874 unsigned char buf[MD5_DIGEST_LENGTH];
878 if (vp->attribute == PW_MS_MPPE_RECV_KEY)
881 if (vp->lvalue != 34) {
882 error("RADIUS: Incorrect attribute length (%d) for MS-MPPE-%s-Key",
887 if ((salt[0] & 0x80) == 0) {
888 error("RADIUS: Illegal salt value for MS-MPPE-%s-Key attribute", type);
892 memcpy(plain, crypt, 32);
894 ctx = PPP_MD_CTX_new();
897 if (PPP_DigestInit(ctx, PPP_md5())) {
899 if (PPP_DigestUpdate(ctx, req_info->secret, strlen(req_info->secret))) {
901 if (PPP_DigestUpdate(ctx, req_info->request_vector, AUTH_VECTOR_LEN)) {
903 if (PPP_DigestUpdate(ctx, salt, 2)) {
905 buflen = sizeof(buf);
906 if (PPP_DigestFinal(ctx, buf, &buflen)) {
915 PPP_MD_CTX_free(ctx);
920 for (i = 0; i < 16; i++) {
924 if (plain[0] != 16) {
925 error("RADIUS: Incorrect key length (%d) for MS-MPPE-%s-Key attribute",
926 (int) plain[0], type);
931 ctx = PPP_MD_CTX_new();
934 if (PPP_DigestInit(ctx, PPP_md5())) {
936 if (PPP_DigestUpdate(ctx, req_info->secret, strlen(req_info->secret))) {
938 if (PPP_DigestUpdate(ctx, crypt, 16)) {
940 if (PPP_DigestUpdate(ctx, salt, 2)) {
942 buflen = sizeof(buf);
943 if (PPP_DigestFinal(ctx, buf, &buflen)) {
952 PPP_MD_CTX_free(ctx);
957 plain[16] ^= buf[0]; /* only need the first byte */
959 if (vp->attribute == PW_MS_MPPE_SEND_KEY) {
960 mppe_set_keys(plain + 1, NULL, 16);
962 mppe_set_keys(NULL, plain + 1, 16);
970 #endif /* PPP_WITH_MPPE */
972 /**********************************************************************
973 * %FUNCTION: radius_acct_start
979 * Sends a "start" accounting message to the RADIUS server.
980 ***********************************************************************/
982 radius_acct_start(void)
986 VALUE_PAIR *send = NULL;
987 ipcp_options *ho = &ipcp_hisoptions[0];
990 if (!rstate.initialized) {
994 rstate.start_time = time(NULL);
996 strlcpy(rstate.session_id, rc_mksid(), MAXSESSIONID);
998 rc_avpair_add(&send, PW_ACCT_SESSION_ID,
999 rstate.session_id, 0, VENDOR_NONE);
1000 rc_avpair_add(&send, PW_USER_NAME,
1001 rstate.user, 0, VENDOR_NONE);
1003 if (rstate.class_len > 0)
1004 rc_avpair_add(&send, PW_CLASS,
1005 rstate.class, rstate.class_len, VENDOR_NONE);
1007 av_type = PW_STATUS_START;
1008 rc_avpair_add(&send, PW_ACCT_STATUS_TYPE, &av_type, 0, VENDOR_NONE);
1010 av_type = PW_FRAMED;
1011 rc_avpair_add(&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
1014 rc_avpair_add(&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
1016 if (*remote_number) {
1017 rc_avpair_add(&send, PW_CALLING_STATION_ID,
1018 remote_number, 0, VENDOR_NONE);
1020 rc_avpair_add(&send, PW_CALLING_STATION_ID, ipparam, 0, VENDOR_NONE);
1022 av_type = PW_RADIUS;
1023 rc_avpair_add(&send, PW_ACCT_AUTHENTIC, &av_type, 0, VENDOR_NONE);
1026 av_type = ( using_pty ? PW_VIRTUAL : ( sync_serial ? PW_SYNC : PW_ASYNC ) );
1027 rc_avpair_add(&send, PW_NAS_PORT_TYPE, &av_type, 0, VENDOR_NONE);
1029 hisaddr = ho->hisaddr;
1030 av_type = htonl(hisaddr);
1031 rc_avpair_add(&send, PW_FRAMED_IP_ADDRESS , &av_type , 0, VENDOR_NONE);
1033 /* Add user specified vp's */
1035 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
1037 if (rstate.acctserver) {
1038 result = rc_acct_using_server(rstate.acctserver,
1039 rstate.client_port, send);
1041 result = rc_acct(rstate.client_port, send);
1044 rc_avpair_free(send);
1046 if (result != OK_RC) {
1047 /* RADIUS server could be down so make this a warning */
1049 "Accounting START failed for %s", rstate.user);
1052 /* Kick off periodic accounting reports */
1053 if (rstate.acct_interim_interval) {
1054 TIMEOUT(radius_acct_interim, NULL, rstate.acct_interim_interval);
1058 /**********************************************************************
1059 * %FUNCTION: radius_acct_stop
1065 * Sends a "stop" accounting message to the RADIUS server.
1066 ***********************************************************************/
1068 radius_acct_stop(void)
1071 VALUE_PAIR *send = NULL;
1072 ipcp_options *ho = &ipcp_hisoptions[0];
1076 if (!rstate.initialized) {
1080 if (rstate.acct_interim_interval)
1081 UNTIMEOUT(radius_acct_interim, NULL);
1083 rc_avpair_add(&send, PW_ACCT_SESSION_ID, rstate.session_id,
1086 rc_avpair_add(&send, PW_USER_NAME, rstate.user, 0, VENDOR_NONE);
1088 if (rstate.class_len > 0)
1089 rc_avpair_add(&send, PW_CLASS,
1090 rstate.class, rstate.class_len, VENDOR_NONE);
1092 av_type = PW_STATUS_STOP;
1093 rc_avpair_add(&send, PW_ACCT_STATUS_TYPE, &av_type, 0, VENDOR_NONE);
1095 av_type = PW_FRAMED;
1096 rc_avpair_add(&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
1099 rc_avpair_add(&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
1101 av_type = PW_RADIUS;
1102 rc_avpair_add(&send, PW_ACCT_AUTHENTIC, &av_type, 0, VENDOR_NONE);
1105 if (link_stats_valid) {
1106 av_type = link_connect_time;
1107 rc_avpair_add(&send, PW_ACCT_SESSION_TIME, &av_type, 0, VENDOR_NONE);
1109 av_type = link_stats.bytes_out & 0xFFFFFFFF;
1110 rc_avpair_add(&send, PW_ACCT_OUTPUT_OCTETS, &av_type, 0, VENDOR_NONE);
1112 if (link_stats.bytes_out > 0xFFFFFFFF) {
1113 av_type = link_stats.bytes_out >> 32;
1114 rc_avpair_add(&send, PW_ACCT_OUTPUT_GIGAWORDS, &av_type, 0, VENDOR_NONE);
1117 av_type = link_stats.bytes_in & 0xFFFFFFFF;
1118 rc_avpair_add(&send, PW_ACCT_INPUT_OCTETS, &av_type, 0, VENDOR_NONE);
1120 if (link_stats.bytes_in > 0xFFFFFFFF) {
1121 av_type = link_stats.bytes_in >> 32;
1122 rc_avpair_add(&send, PW_ACCT_INPUT_GIGAWORDS, &av_type, 0, VENDOR_NONE);
1125 av_type = link_stats.pkts_out;
1126 rc_avpair_add(&send, PW_ACCT_OUTPUT_PACKETS, &av_type, 0, VENDOR_NONE);
1128 av_type = link_stats.pkts_in;
1129 rc_avpair_add(&send, PW_ACCT_INPUT_PACKETS, &av_type, 0, VENDOR_NONE);
1132 if (*remote_number) {
1133 rc_avpair_add(&send, PW_CALLING_STATION_ID,
1134 remote_number, 0, VENDOR_NONE);
1136 rc_avpair_add(&send, PW_CALLING_STATION_ID, ipparam, 0, VENDOR_NONE);
1138 av_type = ( using_pty ? PW_VIRTUAL : ( sync_serial ? PW_SYNC : PW_ASYNC ) );
1139 rc_avpair_add(&send, PW_NAS_PORT_TYPE, &av_type, 0, VENDOR_NONE);
1141 av_type = PW_NAS_ERROR;
1144 av_type = PW_USER_REQUEST;
1147 case EXIT_USER_REQUEST:
1148 av_type = PW_ADMIN_RESET;
1152 case EXIT_PEER_DEAD:
1153 case EXIT_CONNECT_FAILED:
1154 av_type = PW_LOST_CARRIER;
1157 case EXIT_INIT_FAILED:
1158 case EXIT_OPEN_FAILED:
1159 case EXIT_LOCK_FAILED:
1160 case EXIT_PTYCMD_FAILED:
1161 av_type = PW_PORT_ERROR;
1164 case EXIT_PEER_AUTH_FAILED:
1165 case EXIT_AUTH_TOPEER_FAILED:
1166 case EXIT_NEGOTIATION_FAILED:
1167 case EXIT_CNID_AUTH_FAILED:
1168 av_type = PW_SERVICE_UNAVAILABLE;
1171 case EXIT_IDLE_TIMEOUT:
1172 av_type = PW_ACCT_IDLE_TIMEOUT;
1176 av_type = PW_CALLBACK;
1179 case EXIT_CONNECT_TIME:
1180 av_type = PW_ACCT_SESSION_TIMEOUT;
1183 case EXIT_TRAFFIC_LIMIT:
1184 av_type = PW_NAS_REQUEST;
1188 av_type = PW_NAS_ERROR;
1191 rc_avpair_add(&send, PW_ACCT_TERMINATE_CAUSE, &av_type, 0, VENDOR_NONE);
1193 hisaddr = ho->hisaddr;
1194 av_type = htonl(hisaddr);
1195 rc_avpair_add(&send, PW_FRAMED_IP_ADDRESS , &av_type , 0, VENDOR_NONE);
1197 /* Add user specified vp's */
1199 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
1201 if (rstate.acctserver) {
1202 result = rc_acct_using_server(rstate.acctserver,
1203 rstate.client_port, send);
1205 result = rc_acct(rstate.client_port, send);
1208 if (result != OK_RC) {
1209 /* RADIUS server could be down so make this a warning */
1211 "Accounting STOP failed for %s", rstate.user);
1213 rc_avpair_free(send);
1216 /**********************************************************************
1217 * %FUNCTION: radius_acct_interim
1223 * Sends an interim accounting message to the RADIUS server
1224 ***********************************************************************/
1226 radius_acct_interim(void *ignored)
1229 VALUE_PAIR *send = NULL;
1230 ipcp_options *ho = &ipcp_hisoptions[0];
1234 if (!rstate.initialized) {
1238 rc_avpair_add(&send, PW_ACCT_SESSION_ID, rstate.session_id,
1241 rc_avpair_add(&send, PW_USER_NAME, rstate.user, 0, VENDOR_NONE);
1243 if (rstate.class_len > 0)
1244 rc_avpair_add(&send, PW_CLASS,
1245 rstate.class, rstate.class_len, VENDOR_NONE);
1247 av_type = PW_STATUS_ALIVE;
1248 rc_avpair_add(&send, PW_ACCT_STATUS_TYPE, &av_type, 0, VENDOR_NONE);
1250 av_type = PW_FRAMED;
1251 rc_avpair_add(&send, PW_SERVICE_TYPE, &av_type, 0, VENDOR_NONE);
1254 rc_avpair_add(&send, PW_FRAMED_PROTOCOL, &av_type, 0, VENDOR_NONE);
1256 av_type = PW_RADIUS;
1257 rc_avpair_add(&send, PW_ACCT_AUTHENTIC, &av_type, 0, VENDOR_NONE);
1259 /* Update link stats */
1260 update_link_stats(0);
1262 if (link_stats_valid) {
1263 link_stats_valid = 0; /* Force later code to update */
1265 av_type = link_connect_time;
1266 rc_avpair_add(&send, PW_ACCT_SESSION_TIME, &av_type, 0, VENDOR_NONE);
1268 av_type = link_stats.bytes_out & 0xFFFFFFFF;
1269 rc_avpair_add(&send, PW_ACCT_OUTPUT_OCTETS, &av_type, 0, VENDOR_NONE);
1271 if (link_stats.bytes_out > 0xFFFFFFFF) {
1272 av_type = link_stats.bytes_out >> 32;
1273 rc_avpair_add(&send, PW_ACCT_OUTPUT_GIGAWORDS, &av_type, 0, VENDOR_NONE);
1276 av_type = link_stats.bytes_in & 0xFFFFFFFF;
1277 rc_avpair_add(&send, PW_ACCT_INPUT_OCTETS, &av_type, 0, VENDOR_NONE);
1279 if (link_stats.bytes_in > 0xFFFFFFFF) {
1280 av_type = link_stats.bytes_in >> 32;
1281 rc_avpair_add(&send, PW_ACCT_INPUT_GIGAWORDS, &av_type, 0, VENDOR_NONE);
1284 av_type = link_stats.pkts_out;
1285 rc_avpair_add(&send, PW_ACCT_OUTPUT_PACKETS, &av_type, 0, VENDOR_NONE);
1287 av_type = link_stats.pkts_in;
1288 rc_avpair_add(&send, PW_ACCT_INPUT_PACKETS, &av_type, 0, VENDOR_NONE);
1291 if (*remote_number) {
1292 rc_avpair_add(&send, PW_CALLING_STATION_ID,
1293 remote_number, 0, VENDOR_NONE);
1295 rc_avpair_add(&send, PW_CALLING_STATION_ID, ipparam, 0, VENDOR_NONE);
1297 av_type = ( using_pty ? PW_VIRTUAL : ( sync_serial ? PW_SYNC : PW_ASYNC ) );
1298 rc_avpair_add(&send, PW_NAS_PORT_TYPE, &av_type, 0, VENDOR_NONE);
1300 hisaddr = ho->hisaddr;
1301 av_type = htonl(hisaddr);
1302 rc_avpair_add(&send, PW_FRAMED_IP_ADDRESS , &av_type , 0, VENDOR_NONE);
1304 /* Add user specified vp's */
1306 rc_avpair_insert(&send, NULL, rc_avpair_copy(rstate.avp));
1308 if (rstate.acctserver) {
1309 result = rc_acct_using_server(rstate.acctserver,
1310 rstate.client_port, send);
1312 result = rc_acct(rstate.client_port, send);
1315 if (result != OK_RC) {
1316 /* RADIUS server could be down so make this a warning */
1318 "Interim accounting failed for %s", rstate.user);
1320 rc_avpair_free(send);
1322 /* Schedule another one */
1323 TIMEOUT(radius_acct_interim, NULL, rstate.acct_interim_interval);
1326 /**********************************************************************
1327 * %FUNCTION: radius_ip_up
1334 * Called when IPCP is up. We'll do a start-accounting record.
1335 ***********************************************************************/
1337 radius_ip_up(void *opaque, int arg)
1339 radius_acct_start();
1342 /**********************************************************************
1343 * %FUNCTION: radius_ip_down
1350 * Called when IPCP is down. We'll do a stop-accounting record.
1351 ***********************************************************************/
1353 radius_ip_down(void *opaque, int arg)
1358 /**********************************************************************
1359 * %FUNCTION: radius_init
1361 * msg -- buffer of size BUF_LEN for error message
1363 * negative on failure; non-negative on success
1365 * Initializes radiusclient library
1366 ***********************************************************************/
1368 radius_init(char *msg)
1370 if (rstate.initialized) {
1374 if (config_file && *config_file) {
1375 strlcpy(rstate.config_file, config_file, MAXPATHLEN-1);
1378 rstate.initialized = 1;
1380 if (rc_read_config(rstate.config_file) != 0) {
1381 slprintf(msg, BUF_LEN, "RADIUS: Can't read config file %s",
1382 rstate.config_file);
1386 if (rc_read_dictionary(rc_conf_str("dictionary")) != 0) {
1387 slprintf(msg, BUF_LEN, "RADIUS: Can't read dictionary file %s",
1388 rc_conf_str("dictionary"));
1392 if (rc_read_mapfile(rc_conf_str("mapfile")) != 0) {
1393 slprintf(msg, BUF_LEN, "RADIUS: Can't read map file %s",
1394 rc_conf_str("mapfile"));
1398 /* Add av pairs saved during option parsing */
1400 struct avpopt *n = avpopt->next;
1402 rc_avpair_parse(avpopt->vpstr, &rstate.avp);
1403 free(avpopt->vpstr);
1410 /**********************************************************************
1411 * %FUNCTION: get_client_port
1413 * ifname -- PPP interface name (e.g. "ppp7")
1415 * The NAS port number (e.g. 7)
1417 * Extracts the port number from the interface name
1418 ***********************************************************************/
1420 get_client_port(char *ifname)
1423 if (sscanf(ifname, "ppp%d", &port) == 1) {
1426 return rc_map2id(ifname);
1429 /**********************************************************************
1430 * %FUNCTION: radius_allowed_address
1432 * addr -- IP address
1434 * 1 if we're allowed to use that IP address; 0 if not; -1 if we do
1436 ***********************************************************************/
1438 radius_allowed_address(u_int32_t addr)
1440 ipcp_options *wo = &ipcp_wantoptions[0];
1442 if (!rstate.choose_ip) {
1443 /* If RADIUS server said any address is OK, then fine... */
1444 if (rstate.any_ip_addr_ok) {
1448 /* Sigh... if an address was supplied for remote host in pppd
1449 options, it has to match that. */
1450 if (wo->hisaddr != 0 && wo->hisaddr == addr) {
1456 if (addr == rstate.ip_addr) return 1;
1460 /* Useful for other plugins */
1461 char *radius_logged_in_user(void)