2 * radeapclient.c EAP specific radius packet debug tool.
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 Alan DeKok <aland@ox.org>
25 #include <freeradius-devel/ident.h>
28 #include <freeradius-devel/libradius.h>
36 #include <freeradius-devel/conf.h>
37 #include <freeradius-devel/radpaths.h>
38 #include <freeradius-devel/md5.h>
40 #include "eap_types.h"
43 extern int sha1_data_problems;
45 static int retries = 10;
46 static float timeout = 3;
47 static const char *secret = NULL;
48 static int do_output = 1;
49 static int do_summary = 0;
50 static int filedone = 0;
51 static int totalapp = 0;
52 static int totaldeny = 0;
53 static char filesecret[256];
54 char *radius_dir = NULL;
55 const char *progname = "radeapclient";
56 /* fr_randctx randctx; */
59 #include <freeradius-devel/tls.h>
62 radlog_dest_t radlog_dest = RADLOG_STDERR;
63 const char *radlog_dir = NULL;
67 struct eapsim_keys eapsim_mk;
69 static void map_eap_types(RADIUS_PACKET *req);
70 static void unmap_eap_types(RADIUS_PACKET *rep);
71 static int map_eapsim_types(RADIUS_PACKET *r);
72 static int unmap_eapsim_types(RADIUS_PACKET *r);
74 void debug_pair_list(UNUSED VALUE_PAIR *vp)
79 static void NEVER_RETURNS usage(void)
81 fprintf(stderr, "Usage: radeapclient [options] server[:port] <command> [<secret>]\n");
83 fprintf(stderr, " <command> One of auth, acct, status, or disconnect.\n");
84 fprintf(stderr, " -c count Send each packet 'count' times.\n");
85 fprintf(stderr, " -d raddb Set dictionary directory.\n");
86 fprintf(stderr, " -f file Read packets from file, not stdin.\n");
87 fprintf(stderr, " -r retries If timeout, retry sending the packet 'retries' times.\n");
88 fprintf(stderr, " -t timeout Wait 'timeout' seconds before retrying (may be a floating point number).\n");
89 fprintf(stderr, " -h Print usage help information.\n");
90 fprintf(stderr, " -i id Set request id to 'id'. Values may be 0..255\n");
91 fprintf(stderr, " -S file read secret from file, not command line.\n");
92 fprintf(stderr, " -q Do not print anything out.\n");
93 fprintf(stderr, " -s Print out summary information of auth results.\n");
94 fprintf(stderr, " -v Show program version information.\n");
95 fprintf(stderr, " -x Debugging mode.\n");
96 fprintf(stderr, " -4 Use IPv4 address of server\n");
97 fprintf(stderr, " -6 Use IPv6 address of server.\n");
102 int radlog(int lvl, const char *msg, ...)
107 r = lvl; /* shut up compiler */
110 r = vfprintf(stderr, msg, ap);
117 int log_debug(const char *msg, ...)
123 r = vfprintf(stderr, msg, ap);
130 void radlog_request(UNUSED int lvl, UNUSED int priority,
131 UNUSED REQUEST *request, const char *msg, ...)
136 vfprintf(stderr, msg, ap);
141 static int getport(const char *name)
145 svp = getservbyname (name, "udp");
150 return ntohs(svp->s_port);
155 static void debug_packet(RADIUS_PACKET *packet, int direction)
159 const char *received, *from;
160 const fr_ipaddr_t *ip;
165 if (direction == 0) {
166 received = "Received";
167 from = "from"; /* what else? */
168 ip = &packet->src_ipaddr;
169 port = packet->src_port;
172 received = "Sending";
173 from = "to"; /* hah! */
174 ip = &packet->dst_ipaddr;
175 port = packet->dst_port;
179 * Client-specific debugging re-prints the input
180 * packet into the client log.
182 * This really belongs in a utility library
184 if ((packet->code > 0) && (packet->code < FR_MAX_PACKET_CODE)) {
185 printf("%s %s packet %s host %s port %d, id=%d, length=%d\n",
186 received, fr_packet_codes[packet->code], from,
187 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
188 port, packet->id, (int) packet->data_len);
190 printf("%s packet %s host %s port %d code=%d, id=%d, length=%d\n",
192 inet_ntop(ip->af, &ip->ipaddr, buffer, sizeof(buffer)),
194 packet->code, packet->id, (int) packet->data_len);
197 for (vp = packet->vps; vp != NULL; vp = vp->next) {
198 vp_prints(buffer, sizeof(buffer), vp);
199 printf("\t%s\n", buffer);
205 static int send_packet(RADIUS_PACKET *req, RADIUS_PACKET **rep)
210 for (i = 0; i < retries; i++) {
213 debug_packet(req, R_SENT);
215 rad_send(req, NULL, secret);
217 /* And wait for reply, timing out as necessary */
219 FD_SET(req->sockfd, &rdfdesc);
221 tv.tv_sec = (int)timeout;
222 tv.tv_usec = 1000000 * (timeout - (int) timeout);
224 /* Something's wrong if we don't get exactly one fd. */
225 if (select(req->sockfd + 1, &rdfdesc, NULL, NULL, &tv) != 1) {
229 *rep = rad_recv(req->sockfd, 0);
232 * If we get a response from a machine
233 * which we did NOT send a request to,
236 if (((*rep)->src_ipaddr.af != req->dst_ipaddr.af) ||
237 (memcmp(&(*rep)->src_ipaddr.ipaddr,
238 &req->dst_ipaddr.ipaddr,
239 ((req->dst_ipaddr.af == AF_INET ? /* AF_INET6? */
240 sizeof(req->dst_ipaddr.ipaddr.ip4addr) : /* FIXME: AF_INET6 */
241 sizeof(req->dst_ipaddr.ipaddr.ip6addr)))) != 0) ||
242 ((*rep)->src_port != req->dst_port)) {
243 char src[128], dst[128];
245 ip_ntoh(&(*rep)->src_ipaddr, src, sizeof(src));
246 ip_ntoh(&req->dst_ipaddr, dst, sizeof(dst));
247 fprintf(stderr, "radclient: ERROR: Sent request to host %s port %d, got response from host %s port %d\n!",
249 src, (*rep)->src_port);
253 } else { /* NULL: couldn't receive the packet */
254 fr_perror("radclient:");
259 /* No response or no data read (?) */
261 fprintf(stderr, "radclient: no response from server\n");
266 * FIXME: Discard the packet & listen for another.
268 * Hmm... we should really be using eapol_test, which does
269 * a lot more than radeapclient.
271 if (rad_verify(*rep, req, secret) != 0) {
272 fr_perror("rad_verify");
276 if (rad_decode(*rep, req, secret) != 0) {
277 fr_perror("rad_decode");
281 /* libradius debug already prints out the value pairs for us */
282 if (!fr_debug_flag && do_output) {
283 debug_packet(*rep, R_RECV);
285 if((*rep)->code == PW_AUTHENTICATION_ACK) {
287 } else if ((*rep)->code == PW_AUTHENTICATION_REJECT) {
294 static void cleanresp(RADIUS_PACKET *resp)
296 VALUE_PAIR *vpnext, *vp, **last;
300 * maybe should just copy things we care about, or keep
301 * a copy of the original input and start from there again?
303 pairdelete(&resp->vps, PW_EAP_MESSAGE, 0, TAG_ANY);
304 pairdelete(&resp->vps, ATTRIBUTE_EAP_BASE+PW_EAP_IDENTITY, 0, TAG_ANY);
307 for(vp = *last; vp != NULL; vp = vpnext)
311 if((vp->attribute > ATTRIBUTE_EAP_BASE &&
312 vp->attribute <= ATTRIBUTE_EAP_BASE+256) ||
313 (vp->attribute > ATTRIBUTE_EAP_SIM_BASE &&
314 vp->attribute <= ATTRIBUTE_EAP_SIM_BASE+256))
325 * we got an EAP-Request/Sim/Start message in a legal state.
327 * pick a supported version, put it into the reply, and insert a nonce.
329 static int process_eap_start(RADIUS_PACKET *req,
332 VALUE_PAIR *vp, *newvp;
333 VALUE_PAIR *anyidreq_vp, *fullauthidreq_vp, *permanentidreq_vp;
334 uint16_t *versions, selectedversion;
335 unsigned int i,versioncount;
337 /* form new response clear of any EAP stuff */
340 if((vp = pairfind(req->vps, ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_VERSION_LIST, 0, TAG_ANY)) == NULL) {
341 fprintf(stderr, "illegal start message has no VERSION_LIST\n");
345 versions = (uint16_t *)vp->vp_strvalue;
347 /* verify that the attribute length is big enough for a length field */
350 fprintf(stderr, "start message has illegal VERSION_LIST. Too short: %u\n", (unsigned int) vp->length);
354 versioncount = ntohs(versions[0])/2;
355 /* verify that the attribute length is big enough for the given number
356 * of versions present.
358 if((unsigned)vp->length <= (versioncount*2 + 2))
360 fprintf(stderr, "start message is too short. Claimed %d versions does not fit in %u bytes\n", versioncount, (unsigned int) vp->length);
365 * record the versionlist for the MK calculation.
367 eapsim_mk.versionlistlen = versioncount*2;
368 memcpy(eapsim_mk.versionlist, (unsigned char *)(versions+1),
369 eapsim_mk.versionlistlen);
371 /* walk the version list, and pick the one we support, which
372 * at present, is 1, EAP_SIM_VERSION.
375 for(i=0; i < versioncount; i++)
377 if(ntohs(versions[i+1]) == EAP_SIM_VERSION)
379 selectedversion=EAP_SIM_VERSION;
383 if(selectedversion == 0)
385 fprintf(stderr, "eap-sim start message. No compatible version found. We need %d\n", EAP_SIM_VERSION);
386 for(i=0; i < versioncount; i++)
388 fprintf(stderr, "\tfound version %d\n",
389 ntohs(versions[i+1]));
394 * now make sure that we have only FULLAUTH_ID_REQ.
395 * I think that it actually might not matter - we can answer in
396 * anyway we like, but it is illegal to have more than one
399 anyidreq_vp = pairfind(req->vps, ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_ANY_ID_REQ, 0, TAG_ANY);
400 fullauthidreq_vp = pairfind(req->vps, ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_FULLAUTH_ID_REQ, 0, TAG_ANY);
401 permanentidreq_vp = pairfind(req->vps, ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_PERMANENT_ID_REQ, 0, TAG_ANY);
403 if(fullauthidreq_vp == NULL ||
404 anyidreq_vp != NULL ||
405 permanentidreq_vp != NULL) {
406 fprintf(stderr, "start message has %sanyidreq, %sfullauthid and %spermanentid. Illegal combination.\n",
407 (anyidreq_vp != NULL ? "a " : "no "),
408 (fullauthidreq_vp != NULL ? "a " : "no "),
409 (permanentidreq_vp != NULL ? "a " : "no "));
413 /* okay, we have just any_id_req there, so fill in response */
415 /* mark the subtype as being EAP-SIM/Response/Start */
416 newvp = paircreate(ATTRIBUTE_EAP_SIM_SUBTYPE, 0, PW_TYPE_INTEGER);
417 newvp->vp_integer = eapsim_start;
418 pairreplace(&(rep->vps), newvp);
420 /* insert selected version into response. */
421 newvp = paircreate(ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_SELECTED_VERSION,
423 versions = (uint16_t *)newvp->vp_strvalue;
424 versions[0] = htons(selectedversion);
426 pairreplace(&(rep->vps), newvp);
428 /* record the selected version */
429 memcpy(eapsim_mk.versionselect, (unsigned char *)versions, 2);
436 * insert a nonce_mt that we make up.
438 newvp = paircreate(ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_NONCE_MT,
440 newvp->vp_octets[0]=0;
441 newvp->vp_octets[1]=0;
442 newvp->length = 18; /* 16 bytes of nonce + padding */
448 memcpy(&newvp->vp_octets[2], nonce, 16);
449 pairreplace(&(rep->vps), newvp);
451 /* also keep a copy of the nonce! */
452 memcpy(eapsim_mk.nonce_mt, nonce, 16);
456 uint16_t *pidlen, idlen;
459 * insert the identity here.
461 vp = pairfind(rep->vps, PW_USER_NAME, 0, TAG_ANY);
464 fprintf(stderr, "eap-sim: We need to have a User-Name attribute!\n");
467 newvp = paircreate(ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_IDENTITY,
469 idlen = strlen(vp->vp_strvalue);
470 pidlen = (uint16_t *)newvp->vp_strvalue;
471 *pidlen = htons(idlen);
472 newvp->length = idlen + 2;
474 memcpy(&newvp->vp_strvalue[2], vp->vp_strvalue, idlen);
475 pairreplace(&(rep->vps), newvp);
478 memcpy(eapsim_mk.identity, vp->vp_strvalue, idlen);
479 eapsim_mk.identitylen = idlen;
486 * we got an EAP-Request/Sim/Challenge message in a legal state.
488 * use the RAND challenge to produce the SRES result, and then
489 * use that to generate a new MAC.
491 * for the moment, we ignore the RANDs, then just plug in the SRES
495 static int process_eap_challenge(RADIUS_PACKET *req,
499 VALUE_PAIR *mac, *randvp;
500 VALUE_PAIR *sres1,*sres2,*sres3;
501 VALUE_PAIR *Kc1, *Kc2, *Kc3;
504 /* look for the AT_MAC and the challenge data */
505 mac = pairfind(req->vps, ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_MAC, 0, TAG_ANY);
506 randvp= pairfind(req->vps, ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_RAND, 0, TAG_ANY);
507 if(mac == NULL || randvp == NULL) {
508 fprintf(stderr, "radeapclient: challenge message needs to contain RAND and MAC\n");
513 * compare RAND with randX, to verify this is the right response
517 VALUE_PAIR *randcfgvp[3];
520 randcfg[0] = &randvp->vp_octets[2];
521 randcfg[1] = &randvp->vp_octets[2+EAPSIM_RAND_SIZE];
522 randcfg[2] = &randvp->vp_octets[2+EAPSIM_RAND_SIZE*2];
524 randcfgvp[0] = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_RAND1, 0, TAG_ANY);
525 randcfgvp[1] = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_RAND2, 0, TAG_ANY);
526 randcfgvp[2] = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_RAND3, 0, TAG_ANY);
528 if(randcfgvp[0] == NULL ||
529 randcfgvp[1] == NULL ||
530 randcfgvp[2] == NULL) {
531 fprintf(stderr, "radeapclient: needs to have rand1, 2 and 3 set.\n");
535 if(memcmp(randcfg[0], randcfgvp[0]->vp_octets, EAPSIM_RAND_SIZE)!=0 ||
536 memcmp(randcfg[1], randcfgvp[1]->vp_octets, EAPSIM_RAND_SIZE)!=0 ||
537 memcmp(randcfg[2], randcfgvp[2]->vp_octets, EAPSIM_RAND_SIZE)!=0) {
540 fprintf(stderr, "radeapclient: one of rand 1,2,3 didn't match\n");
541 for(rnum = 0; rnum < 3; rnum++) {
542 fprintf(stderr, "received rand %d: ", rnum);
544 for (i = 0; i < EAPSIM_RAND_SIZE; i++) {
551 fprintf(stderr, "%02x", randcfg[rnum][i]);
553 fprintf(stderr, "\nconfigured rand %d: ", rnum);
555 for (i = 0; i < EAPSIM_RAND_SIZE; i++) {
562 fprintf(stderr, "%02x", randcfgvp[rnum]->vp_octets[i]);
564 fprintf(stderr, "\n");
571 * now dig up the sres values from the response packet,
572 * which were put there when we read things in.
574 * Really, they should be calculated from the RAND!
577 sres1 = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_SRES1, 0, TAG_ANY);
578 sres2 = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_SRES2, 0, TAG_ANY);
579 sres3 = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_SRES3, 0, TAG_ANY);
584 fprintf(stderr, "radeapclient: needs to have sres1, 2 and 3 set.\n");
587 memcpy(eapsim_mk.sres[0], sres1->vp_strvalue, sizeof(eapsim_mk.sres[0]));
588 memcpy(eapsim_mk.sres[1], sres2->vp_strvalue, sizeof(eapsim_mk.sres[1]));
589 memcpy(eapsim_mk.sres[2], sres3->vp_strvalue, sizeof(eapsim_mk.sres[2]));
591 Kc1 = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_KC1, 0, TAG_ANY);
592 Kc2 = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_KC2, 0, TAG_ANY);
593 Kc3 = pairfind(rep->vps, ATTRIBUTE_EAP_SIM_KC3, 0, TAG_ANY);
598 fprintf(stderr, "radeapclient: needs to have Kc1, 2 and 3 set.\n");
601 memcpy(eapsim_mk.Kc[0], Kc1->vp_strvalue, sizeof(eapsim_mk.Kc[0]));
602 memcpy(eapsim_mk.Kc[1], Kc2->vp_strvalue, sizeof(eapsim_mk.Kc[1]));
603 memcpy(eapsim_mk.Kc[2], Kc3->vp_strvalue, sizeof(eapsim_mk.Kc[2]));
605 /* all set, calculate keys */
606 eapsim_calculate_keys(&eapsim_mk);
609 eapsim_dump_mk(&eapsim_mk);
612 /* verify the MAC, now that we have all the keys. */
613 if(eapsim_checkmac(req->vps, eapsim_mk.K_aut,
614 eapsim_mk.nonce_mt, sizeof(eapsim_mk.nonce_mt),
616 printf("MAC check succeed\n");
620 printf("calculated MAC (");
621 for (i = 0; i < 20; i++) {
628 printf("%02x", calcmac[i]);
630 printf(" did not match\n");
634 /* form new response clear of any EAP stuff */
637 /* mark the subtype as being EAP-SIM/Response/Start */
638 newvp = paircreate(ATTRIBUTE_EAP_SIM_SUBTYPE, 0, PW_TYPE_INTEGER);
639 newvp->vp_integer = eapsim_challenge;
640 pairreplace(&(rep->vps), newvp);
643 * fill the SIM_MAC with a field that will in fact get appended
644 * to the packet before the MAC is calculated
646 newvp = paircreate(ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_MAC, 0,
648 memcpy(newvp->vp_strvalue+EAPSIM_SRES_SIZE*0, sres1->vp_strvalue, EAPSIM_SRES_SIZE);
649 memcpy(newvp->vp_strvalue+EAPSIM_SRES_SIZE*1, sres2->vp_strvalue, EAPSIM_SRES_SIZE);
650 memcpy(newvp->vp_strvalue+EAPSIM_SRES_SIZE*2, sres3->vp_strvalue, EAPSIM_SRES_SIZE);
651 newvp->length = EAPSIM_SRES_SIZE*3;
652 pairreplace(&(rep->vps), newvp);
654 newvp = paircreate(ATTRIBUTE_EAP_SIM_KEY, 0, PW_TYPE_OCTETS);
655 memcpy(newvp->vp_strvalue, eapsim_mk.K_aut, EAPSIM_AUTH_SIZE);
656 newvp->length = EAPSIM_AUTH_SIZE;
657 pairreplace(&(rep->vps), newvp);
663 * this code runs the EAP-SIM client state machine.
664 * the *request* is from the server.
665 * the *reponse* is to the server.
668 static int respond_eap_sim(RADIUS_PACKET *req,
671 enum eapsim_clientstates state, newstate;
672 enum eapsim_subtype subtype;
673 VALUE_PAIR *vp, *statevp, *radstate, *eapid;
674 char statenamebuf[32], subtypenamebuf[32];
676 if ((radstate = paircopy2(req->vps, PW_STATE, 0, TAG_ANY)) == NULL)
681 if ((eapid = paircopy2(req->vps, ATTRIBUTE_EAP_ID, 0, TAG_ANY)) == NULL)
686 /* first, dig up the state from the request packet, setting
687 * outselves to be in EAP-SIM-Start state if there is none.
690 if((statevp = pairfind(resp->vps, ATTRIBUTE_EAP_SIM_STATE, 0, TAG_ANY)) == NULL)
692 /* must be initial request */
693 statevp = paircreate(ATTRIBUTE_EAP_SIM_STATE, 0, PW_TYPE_INTEGER);
694 statevp->vp_integer = eapsim_client_init;
695 pairreplace(&(resp->vps), statevp);
697 state = statevp->vp_integer;
700 * map the attributes, and authenticate them.
702 unmap_eapsim_types(req);
704 if((vp = pairfind(req->vps, ATTRIBUTE_EAP_SIM_SUBTYPE, 0, TAG_ANY)) == NULL)
708 subtype = vp->vp_integer;
711 * look for the appropriate state, and process incoming message
714 case eapsim_client_init:
717 newstate = process_eap_start(req, resp);
720 case eapsim_challenge:
721 case eapsim_notification:
724 fprintf(stderr, "radeapclient: sim in state %s message %s is illegal. Reply dropped.\n",
725 sim_state2name(state, statenamebuf, sizeof(statenamebuf)),
726 sim_subtype2name(subtype, subtypenamebuf, sizeof(subtypenamebuf)));
727 /* invalid state, drop message */
732 case eapsim_client_start:
735 /* NOT SURE ABOUT THIS ONE, retransmit, I guess */
736 newstate = process_eap_start(req, resp);
739 case eapsim_challenge:
740 newstate = process_eap_challenge(req, resp);
744 fprintf(stderr, "radeapclient: sim in state %s message %s is illegal. Reply dropped.\n",
745 sim_state2name(state, statenamebuf, sizeof(statenamebuf)),
746 sim_subtype2name(subtype, subtypenamebuf, sizeof(subtypenamebuf)));
747 /* invalid state, drop message */
754 fprintf(stderr, "radeapclient: sim in illegal state %s\n",
755 sim_state2name(state, statenamebuf, sizeof(statenamebuf)));
759 /* copy the eap state object in */
760 pairreplace(&(resp->vps), eapid);
762 /* update stete info, and send new packet */
763 map_eapsim_types(resp);
765 /* copy the radius state object in */
766 pairreplace(&(resp->vps), radstate);
768 statevp->vp_integer = newstate;
772 static int respond_eap_md5(RADIUS_PACKET *req,
775 VALUE_PAIR *vp, *id, *state;
776 size_t valuesize, namesize;
781 uint8_t response[16];
785 if ((state = paircopy2(req->vps, PW_STATE, 0, TAG_ANY)) == NULL)
787 fprintf(stderr, "radeapclient: no state attribute found\n");
791 if ((id = paircopy2(req->vps, ATTRIBUTE_EAP_ID, 0, TAG_ANY)) == NULL)
793 fprintf(stderr, "radeapclient: no EAP-ID attribute found\n");
796 identifier = id->vp_integer;
798 if ((vp = pairfind(req->vps, ATTRIBUTE_EAP_BASE+PW_EAP_MD5, 0, TAG_ANY)) == NULL)
800 fprintf(stderr, "radeapclient: no EAP-MD5 attribute found\n");
804 /* got the details of the MD5 challenge */
805 valuesize = vp->vp_octets[0];
806 value = &vp->vp_octets[1];
807 name = &vp->vp_octets[valuesize+1];
808 namesize = vp->length - (valuesize + 1);
811 if(valuesize > vp->length)
813 fprintf(stderr, "radeapclient: md5 valuesize if too big (%u > %u)\n",
814 (unsigned int) valuesize, (unsigned int) vp->length);
818 /* now do the CHAP operation ourself, rather than build the
819 * buffer. We could also call rad_chap_encode, but it wants
820 * a CHAP-Challenge, which we don't want to bother with.
822 fr_MD5Init(&context);
823 fr_MD5Update(&context, &identifier, 1);
824 fr_MD5Update(&context, (uint8_t *) password, strlen(password));
825 fr_MD5Update(&context, value, valuesize);
826 fr_MD5Final(response, &context);
828 vp = paircreate(ATTRIBUTE_EAP_BASE+PW_EAP_MD5, 0, PW_TYPE_OCTETS);
830 memcpy(&vp->vp_strvalue[1], response, 16);
833 pairreplace(&(rep->vps), vp);
835 pairreplace(&(rep->vps), id);
837 /* copy the state object in */
838 pairreplace(&(rep->vps), state);
845 static int sendrecv_eap(RADIUS_PACKET *rep)
847 RADIUS_PACKET *req = NULL;
848 VALUE_PAIR *vp, *vpnext;
849 int tried_eap_md5 = 0;
852 * Keep a copy of the the User-Password attribute.
854 if ((vp = pairfind(rep->vps, PW_CLEARTEXT_PASSWORD, 0, TAG_ANY)) != NULL) {
855 strlcpy(password, (char *)vp->vp_strvalue, sizeof(vp->vp_strvalue));
857 } else if ((vp = pairfind(rep->vps, PW_USER_PASSWORD, 0, TAG_ANY)) != NULL) {
858 strlcpy(password, (char *)vp->vp_strvalue, sizeof(vp->vp_strvalue));
860 * Otherwise keep a copy of the CHAP-Password attribute.
862 } else if ((vp = pairfind(rep->vps, PW_CHAP_PASSWORD, 0, TAG_ANY)) != NULL) {
863 strlcpy(password, (char *)vp->vp_strvalue, sizeof(vp->vp_strvalue));
872 * if there are EAP types, encode them into an EAP-Message
878 * Fix up Digest-Attributes issues
880 for (vp = rep->vps; vp != NULL; vp = vp->next) {
881 switch (vp->attribute) {
885 case PW_DIGEST_REALM:
886 case PW_DIGEST_NONCE:
887 case PW_DIGEST_METHOD:
890 case PW_DIGEST_ALGORITHM:
891 case PW_DIGEST_BODY_DIGEST:
892 case PW_DIGEST_CNONCE:
893 case PW_DIGEST_NONCE_COUNT:
894 case PW_DIGEST_USER_NAME:
896 memmove(&vp->vp_strvalue[2], &vp->vp_octets[0], vp->length);
897 vp->vp_octets[0] = vp->attribute - PW_DIGEST_REALM + 1;
899 vp->vp_octets[1] = vp->length;
900 vp->attribute = PW_DIGEST_ATTRIBUTES;
906 * If we've already sent a packet, free up the old
907 * one, and ensure that the next packet has a unique
908 * ID and authentication vector.
915 fr_md5_calc(rep->vector, rep->vector,
916 sizeof(rep->vector));
918 if (*password != '\0') {
919 if ((vp = pairfind(rep->vps, PW_CLEARTEXT_PASSWORD, 0, TAG_ANY)) != NULL) {
920 strlcpy((char *)vp->vp_strvalue, password, sizeof(vp->vp_strvalue));
921 vp->length = strlen(password);
923 } else if ((vp = pairfind(rep->vps, PW_USER_PASSWORD, 0, TAG_ANY)) != NULL) {
924 strlcpy((char *)vp->vp_strvalue, password, sizeof(vp->vp_strvalue));
925 vp->length = strlen(password);
927 } else if ((vp = pairfind(rep->vps, PW_CHAP_PASSWORD, 0, TAG_ANY)) != NULL) {
928 strlcpy((char *)vp->vp_strvalue, password, sizeof(vp->vp_strvalue));
929 vp->length = strlen(password);
931 rad_chap_encode(rep, vp->vp_octets, rep->id, vp);
934 } /* there WAS a password */
936 /* send the response, wait for the next request */
937 send_packet(rep, &req);
939 /* okay got back the packet, go and decode the EAP-Message. */
940 unmap_eap_types(req);
942 debug_packet(req, R_RECV);
944 /* now look for the code type. */
945 for (vp = req->vps; vp != NULL; vp = vpnext) {
948 switch (vp->attribute) {
952 case ATTRIBUTE_EAP_BASE+PW_EAP_MD5:
953 if(respond_eap_md5(req, rep) && tried_eap_md5 < 3)
960 case ATTRIBUTE_EAP_BASE+PW_EAP_SIM:
961 if(respond_eap_sim(req, rep))
973 int main(int argc, char **argv)
979 char *filename = NULL;
983 int force_af = AF_UNSPEC;
985 id = ((int)getpid() & 0xff);
988 radlog_dest = RADLOG_STDERR;
990 while ((c = getopt(argc, argv, "46c:d:f:hi:qst:r:S:xXv")) != EOF)
1000 if (!isdigit((int) *optarg))
1002 count = atoi(optarg);
1005 radius_dir = strdup(optarg);
1020 sha1_data_problems = 1; /* for debugging only */
1027 if (!isdigit((int) *optarg))
1029 retries = atoi(optarg);
1032 if (!isdigit((int) *optarg))
1035 if ((id < 0) || (id > 255)) {
1043 if (!isdigit((int) *optarg))
1045 timeout = atof(optarg);
1048 printf("radclient: $Id$ built on " __DATE__ " at " __TIME__ "\n");
1052 fp = fopen(optarg, "r");
1054 fprintf(stderr, "radclient: Error opening %s: %s\n",
1055 optarg, strerror(errno));
1058 if (fgets(filesecret, sizeof(filesecret), fp) == NULL) {
1059 fprintf(stderr, "radclient: Error reading %s: %s\n",
1060 optarg, strerror(errno));
1065 /* truncate newline */
1066 p = filesecret + strlen(filesecret) - 1;
1067 while ((p >= filesecret) &&
1073 if (strlen(filesecret) < 2) {
1074 fprintf(stderr, "radclient: Secret in %s is too short\n", optarg);
1077 secret = filesecret;
1085 argc -= (optind - 1);
1086 argv += (optind - 1);
1089 ((secret == NULL) && (argc < 4))) {
1093 if (!radius_dir) radius_dir = strdup(RADDBDIR);
1095 if (dict_init(radius_dir, RADIUS_DICTIONARY) < 0) {
1096 fr_perror("radclient");
1100 if ((req = rad_alloc(1)) == NULL) {
1101 fr_perror("radclient");
1109 if((randinit = fopen("/dev/urandom", "r")) == NULL)
1111 perror("/dev/urandom");
1113 fread(randctx.randrsl, 256, 1, randinit);
1117 fr_randinit(&randctx, 1);
1125 if (force_af == AF_UNSPEC) force_af = AF_INET;
1126 req->dst_ipaddr.af = force_af;
1127 if (strcmp(argv[1], "-") != 0) {
1128 const char *hostname = argv[1];
1129 const char *portname = argv[1];
1132 if (*argv[1] == '[') { /* IPv6 URL encoded */
1133 p = strchr(argv[1], ']');
1134 if ((size_t) (p - argv[1]) >= sizeof(buffer)) {
1138 memcpy(buffer, argv[1] + 1, p - argv[1] - 1);
1139 buffer[p - argv[1] - 1] = '\0';
1145 p = strchr(portname, ':');
1146 if (p && (strchr(p + 1, ':') == NULL)) {
1153 if (ip_hton(hostname, force_af, &req->dst_ipaddr) < 0) {
1154 fprintf(stderr, "radclient: Failed to find IP address for host %s: %s\n", hostname, strerror(errno));
1159 * Strip port from hostname if needed.
1161 if (portname) port = atoi(portname);
1165 * See what kind of request we want to send.
1167 if (strcmp(argv[2], "auth") == 0) {
1168 if (port == 0) port = getport("radius");
1169 if (port == 0) port = PW_AUTH_UDP_PORT;
1170 req->code = PW_AUTHENTICATION_REQUEST;
1172 } else if (strcmp(argv[2], "acct") == 0) {
1173 if (port == 0) port = getport("radacct");
1174 if (port == 0) port = PW_ACCT_UDP_PORT;
1175 req->code = PW_ACCOUNTING_REQUEST;
1178 } else if (strcmp(argv[2], "status") == 0) {
1179 if (port == 0) port = getport("radius");
1180 if (port == 0) port = PW_AUTH_UDP_PORT;
1181 req->code = PW_STATUS_SERVER;
1183 } else if (strcmp(argv[2], "disconnect") == 0) {
1184 if (port == 0) port = PW_POD_UDP_PORT;
1185 req->code = PW_DISCONNECT_REQUEST;
1187 } else if (isdigit((int) argv[2][0])) {
1188 if (port == 0) port = getport("radius");
1189 if (port == 0) port = PW_AUTH_UDP_PORT;
1190 req->code = atoi(argv[2]);
1194 req->dst_port = port;
1199 if (argv[3]) secret = argv[3];
1203 * Maybe read them, from stdin, if there's no
1204 * filename, or if the filename is '-'.
1206 if (filename && (strcmp(filename, "-") != 0)) {
1207 fp = fopen(filename, "r");
1209 fprintf(stderr, "radclient: Error opening %s: %s\n",
1210 filename, strerror(errno));
1220 if ((req->sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
1221 perror("radclient: socket: ");
1226 if(req->vps) pairfree(&req->vps);
1228 if ((req->vps = readvp2(fp, &filedone, "radeapclient:"))
1238 printf("\n\t Total approved auths: %d\n", totalapp);
1239 printf("\t Total denied auths: %d\n", totaldeny);
1245 * given a radius request with some attributes in the EAP range, build
1246 * them all into a single EAP-Message body.
1248 * Note that this function will build multiple EAP-Message bodies
1249 * if there are multiple eligible EAP-types. This is incorrect, as the
1250 * recipient will in fact concatenate them.
1252 * XXX - we could break the loop once we process one type. Maybe this
1253 * just deserves an assert?
1256 static void map_eap_types(RADIUS_PACKET *req)
1258 VALUE_PAIR *vp, *vpnext;
1263 vp = pairfind(req->vps, ATTRIBUTE_EAP_ID, 0, TAG_ANY);
1265 id = ((int)getpid() & 0xff);
1267 id = vp->vp_integer;
1270 vp = pairfind(req->vps, ATTRIBUTE_EAP_CODE, 0, TAG_ANY);
1272 eapcode = PW_EAP_REQUEST;
1274 eapcode = vp->vp_integer;
1278 for(vp = req->vps; vp != NULL; vp = vpnext) {
1279 /* save it in case it changes! */
1282 if(vp->attribute >= ATTRIBUTE_EAP_BASE &&
1283 vp->attribute < ATTRIBUTE_EAP_BASE+256) {
1292 eap_type = vp->attribute - ATTRIBUTE_EAP_BASE;
1295 case PW_EAP_IDENTITY:
1296 case PW_EAP_NOTIFICATION:
1307 * no known special handling, it is just encoded as an
1308 * EAP-message with the given type.
1311 /* nuke any existing EAP-Messages */
1312 pairdelete(&req->vps, PW_EAP_MESSAGE, 0, TAG_ANY);
1314 memset(&ep, 0, sizeof(ep));
1317 ep.type.type = eap_type;
1318 ep.type.length = vp->length;
1319 ep.type.data = malloc(vp->length);
1320 memcpy(ep.type.data,vp->vp_octets, vp->length);
1321 eap_basic_compose(req, &ep);
1326 * given a radius request with an EAP-Message body, decode it specific
1329 static void unmap_eap_types(RADIUS_PACKET *rep)
1336 /* find eap message */
1337 e = eap_vp2packet(rep->vps);
1339 /* nothing to do! */
1340 if(e == NULL) return;
1342 /* create EAP-ID and EAP-CODE attributes to start */
1343 eap1 = paircreate(ATTRIBUTE_EAP_ID, 0, PW_TYPE_INTEGER);
1344 eap1->vp_integer = e->id;
1345 pairadd(&(rep->vps), eap1);
1347 eap1 = paircreate(ATTRIBUTE_EAP_CODE, 0, PW_TYPE_INTEGER);
1348 eap1->vp_integer = e->code;
1349 pairadd(&(rep->vps), eap1);
1354 case PW_EAP_SUCCESS:
1355 case PW_EAP_FAILURE:
1359 case PW_EAP_REQUEST:
1360 case PW_EAP_RESPONSE:
1361 /* there is a type field, which we use to create
1362 * a new attribute */
1364 /* the length was decode already into the attribute
1365 * length, and was checked already. Network byte
1366 * order, just pull it out using math.
1368 len = e->length[0]*256 + e->length[1];
1370 /* verify the length is big enough to hold type */
1379 type += ATTRIBUTE_EAP_BASE;
1382 if(len > MAX_STRING_LEN) {
1383 len = MAX_STRING_LEN;
1386 eap1 = paircreate(type, 0, PW_TYPE_OCTETS);
1387 memcpy(eap1->vp_strvalue, &e->data[1], len);
1389 pairadd(&(rep->vps), eap1);
1397 static int map_eapsim_types(RADIUS_PACKET *r)
1402 memset(&ep, 0, sizeof(ep));
1403 ret = map_eapsim_basictypes(r, &ep);
1407 eap_basic_compose(r, &ep);
1412 static int unmap_eapsim_types(RADIUS_PACKET *r)
1416 esvp = pairfind(r->vps, ATTRIBUTE_EAP_BASE+PW_EAP_SIM, 0, TAG_ANY);
1418 radlog(L_ERR, "eap: EAP-Sim attribute not found");
1422 return unmap_eapsim_basictypes(r, esvp->vp_octets, esvp->length);
1429 const char *radius_dir = RADDBDIR;
1431 int radlog(int lvl, const char *msg, ...)
1437 r = vfprintf(stderr, msg, ap);
1439 fputc('\n', stderr);
1444 main(int argc, char *argv[])
1447 RADIUS_PACKET *req,*req2;
1448 VALUE_PAIR *vp, *vpkey, *vpextra;
1449 extern unsigned int sha1_data_problems;
1456 sha1_data_problems = 1;
1459 if (dict_init(radius_dir, RADIUS_DICTIONARY) < 0) {
1460 fr_perror("radclient");
1464 if ((req = rad_alloc(1)) == NULL) {
1465 fr_perror("radclient");
1469 if ((req2 = rad_alloc(1)) == NULL) {
1470 fr_perror("radclient");
1475 if(req->vps) pairfree(&req->vps);
1476 if(req2->vps) pairfree(&req2->vps);
1478 if ((req->vps = readvp2(stdin, &filedone, "eapsimlib:")) == NULL) {
1482 if (fr_debug_flag > 1) {
1483 printf("\nRead:\n");
1484 vp_printlist(stdout, req->vps);
1487 map_eapsim_types(req);
1490 if (fr_debug_flag > 1) {
1491 printf("Mapped to:\n");
1492 vp_printlist(stdout, req->vps);
1495 /* find the EAP-Message, copy it to req2 */
1496 vp = paircopy2(req->vps, PW_EAP_MESSAGE, 0, TAG_ANY);
1498 if(vp == NULL) continue;
1500 pairadd(&req2->vps, vp);
1502 /* only call unmap for sim types here */
1503 unmap_eap_types(req2);
1504 unmap_eapsim_types(req2);
1506 if (fr_debug_flag > 1) {
1507 printf("Unmapped to:\n");
1508 vp_printlist(stdout, req2->vps);
1511 vp = pairfind(req2->vps, ATTRIBUTE_EAP_SIM_BASE+PW_EAP_SIM_MAC, 0, TAG_ANY);
1512 vpkey = pairfind(req->vps, ATTRIBUTE_EAP_SIM_KEY, 0, TAG_ANY);
1513 vpextra = pairfind(req->vps, ATTRIBUTE_EAP_SIM_EXTRA, 0, TAG_ANY);
1515 if(vp != NULL && vpkey != NULL && vpextra!=NULL) {
1516 uint8_t calcmac[16];
1518 /* find the EAP-Message, copy it to req2 */
1520 memset(calcmac, 0, sizeof(calcmac));
1521 printf("Confirming MAC...");
1522 if(eapsim_checkmac(req2->vps, vpkey->vp_strvalue,
1523 vpextra->vp_strvalue, vpextra->length,
1525 printf("succeed\n");
1529 printf("calculated MAC (");
1530 for (i = 0; i < 20; i++) {
1537 printf("%02x", calcmac[i]);
1539 printf(" did not match\n");