2 * peap.c contains the interfaces that are called from eap
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 2003 Alan DeKok <aland@freeradius.org>
21 * Copyright 2006 The FreeRADIUS server project
24 #include <freeradius-devel/ident.h>
29 static int setup_fake_request(REQUEST *request, REQUEST *fake, peap_tunnel_t *t);
32 * Send protected EAP-Failure
34 * Result-TLV = Failure
36 static int eappeap_failure(EAP_HANDLER *handler, tls_session_t *tls_session)
38 uint8_t tlv_packet[11];
39 REQUEST *request = handler->request;
43 tlv_packet[0] = PW_EAP_REQUEST;
44 tlv_packet[1] = handler->eap_ds->response->id +1;
46 tlv_packet[3] = 11; /* length of this packet */
47 tlv_packet[4] = PW_EAP_TLV;
49 tlv_packet[6] = EAP_TLV_ACK_RESULT;
51 tlv_packet[8] = 2; /* length of the data portion */
53 tlv_packet[10] = EAP_TLV_FAILURE;
55 (tls_session->record_plus)(&tls_session->clean_in, tlv_packet, 11);
58 * FIXME: Check the return code.
60 tls_handshake_send(request, tls_session);
67 * Send protected EAP-Success
69 * Result-TLV = Success
71 static int eappeap_success(EAP_HANDLER *handler, tls_session_t *tls_session)
73 uint8_t tlv_packet[11];
74 REQUEST *request = handler->request;
78 tlv_packet[0] = PW_EAP_REQUEST;
79 tlv_packet[1] = handler->eap_ds->response->id +1;
81 tlv_packet[3] = 11; /* length of this packet */
82 tlv_packet[4] = PW_EAP_TLV;
83 tlv_packet[5] = 0x80; /* mandatory AVP */
84 tlv_packet[6] = EAP_TLV_ACK_RESULT;
86 tlv_packet[8] = 2; /* length of the data portion */
88 tlv_packet[10] = EAP_TLV_SUCCESS;
90 (tls_session->record_plus)(&tls_session->clean_in, tlv_packet, 11);
93 * FIXME: Check the return code.
95 tls_handshake_send(request, tls_session);
101 static int eappeap_identity(EAP_HANDLER *handler, tls_session_t *tls_session)
103 eap_packet_t eap_packet;
105 eap_packet.code = PW_EAP_REQUEST;
106 eap_packet.id = handler->eap_ds->response->id + 1;
107 eap_packet.length[0] = 0;
108 eap_packet.length[1] = EAP_HEADER_LEN + 1;
109 eap_packet.data[0] = PW_EAP_IDENTITY;
111 (tls_session->record_plus)(&tls_session->clean_in,
112 &eap_packet, sizeof(eap_packet));
114 tls_handshake_send(handler->request, tls_session);
115 (tls_session->record_init)(&tls_session->clean_in);
121 * Send an MS SoH request
123 static int eappeap_soh(EAP_HANDLER *handler, tls_session_t *tls_session)
125 uint8_t tlv_packet[20];
127 tlv_packet[0] = 254; /* extended type */
130 tlv_packet[2] = 0x01; /* ms vendor */
131 tlv_packet[3] = 0x37;
133 tlv_packet[4] = 0; /* ms soh eap */
136 tlv_packet[7] = 0x21;
138 tlv_packet[8] = 0; /* vendor-spec tlv */
142 tlv_packet[11] = 8; /* payload len */
144 tlv_packet[12] = 0; /* ms vendor */
146 tlv_packet[14] = 0x01;
147 tlv_packet[15] = 0x37;
154 (tls_session->record_plus)(&tls_session->clean_in, tlv_packet, 20);
155 tls_handshake_send(handler->request, tls_session);
159 static VALUE_PAIR* eapsoh_verify(REQUEST *request, const uint8_t *data, unsigned int data_len) {
162 uint8_t eap_type_base;
167 vp = pairmake("SoH-Supported", "no", T_OP_EQ);
168 if (data && data[0] == PW_EAP_NAK) {
169 RDEBUG("SoH - client NAKed");
173 if (!data || data_len < 8) {
174 RDEBUG("SoH - eap payload too short");
178 eap_type_base = *data++;
179 if (eap_type_base != 254) {
180 RDEBUG("SoH - response is not extended EAP: %i", eap_type_base);
184 eap_vendor = soh_pull_be_24(data); data += 3;
185 if (eap_vendor != 0x137) {
186 RDEBUG("SoH - extended eap vendor %08x is not Microsoft", eap_vendor);
190 eap_type = soh_pull_be_32(data); data += 4;
191 if (eap_type != 0x21) {
192 RDEBUG("SoH - response eap type %08x is not EAP-SoH", eap_type);
197 rv = soh_verify(request, vp, data, data_len - 8);
199 RDEBUG("SoH - error decoding payload: %s", fr_strerror());
208 * Verify the tunneled EAP message.
210 static int eapmessage_verify(REQUEST *request,
211 const uint8_t *data, unsigned int data_len)
213 const eap_packet_t *eap_packet = (const eap_packet_t *) data;
218 * No data, OR only 1 byte of EAP type.
220 if (!data || (data_len == 0) ||
221 ((data_len <= 1) && (data[0] != PW_EAP_IDENTITY))) {
227 case PW_EAP_IDENTITY:
229 RDEBUG2("Identity - ");
232 RDEBUG2("Identity - %*s",
233 data_len - 1, data + 1);
238 * If the first byte of the packet is
239 * EAP-Response, and the EAP data is a TLV,
240 * then it looks OK...
242 case PW_EAP_RESPONSE:
243 if (eap_packet->data[0] == PW_EAP_TLV) {
244 RDEBUG2("Received EAP-TLV response.");
247 RDEBUG2("Got something weird.");
252 * We normally do Microsoft MS-CHAPv2 (26), versus
253 * Cisco MS-CHAPv2 (29).
255 case PW_EAP_MSCHAPV2:
257 RDEBUG2("EAP type %s",
258 eaptype_type2name(eap_type,
259 buffer, sizeof(buffer)));
268 * Convert a pseudo-EAP packet to a list of VALUE_PAIR's.
270 static VALUE_PAIR *eap2vp(REQUEST *request, EAP_DS *eap_ds,
271 const uint8_t *data, size_t data_len)
274 VALUE_PAIR *vp = NULL, *head, **tail;
276 if (data_len > 65535) return NULL; /* paranoia */
278 vp = paircreate(PW_EAP_MESSAGE, 0, PW_TYPE_OCTETS);
280 RDEBUG2("Failure in creating VP");
285 if (total > 249) total = 249;
288 * Hand-build an EAP packet from the crap in PEAP version 0.
290 vp->vp_octets[0] = PW_EAP_RESPONSE;
291 vp->vp_octets[1] = eap_ds->response->id;
292 vp->vp_octets[2] = (data_len + EAP_HEADER_LEN) >> 8;
293 vp->vp_octets[3] = (data_len + EAP_HEADER_LEN) & 0xff;
295 memcpy(vp->vp_octets + EAP_HEADER_LEN, data, total);
296 vp->length = EAP_HEADER_LEN + total;
300 while (total < data_len) {
304 vp = paircreate(PW_EAP_MESSAGE, 0, PW_TYPE_OCTETS);
306 RDEBUG2("Failure in creating VP");
310 vp_len = (data_len - total);
311 if (vp_len > 253) vp_len = 253;
313 memcpy(vp->vp_octets, data + total, vp_len);
326 * Convert a list of VALUE_PAIR's to an EAP packet, through the
327 * simple expedient of dumping the EAP message
329 static int vp2eap(REQUEST *request, tls_session_t *tls_session, VALUE_PAIR *vp)
331 rad_assert(vp != NULL);
334 * Skip the id, code, and length. Just write the EAP
335 * type & data to the client.
338 if ((debug_flag > 2) && fr_log_fp) {
344 for (this = vp; this != NULL; this = this->next) {
347 if (this == vp) start = EAP_HEADER_LEN;
349 for (i = start; i < vp->length; i++) {
350 if ((total & 0x0f) == 0) fprintf(fr_log_fp, " PEAP tunnel data out %04x: ", (int) total);
352 fprintf(fr_log_fp, "%02x ", vp->vp_octets[i]);
354 if ((total & 0x0f) == 0x0f) fprintf(fr_log_fp, "\n");
358 if ((total & 0x0f) != 0) fprintf(fr_log_fp, "\n");
363 * Send the EAP data, WITHOUT the header.
365 (tls_session->record_plus)(&tls_session->clean_in,
366 vp->vp_octets + EAP_HEADER_LEN,
367 vp->length - EAP_HEADER_LEN);
370 * Send the rest of the EAP data.
372 for (vp = vp->next; vp != NULL; vp = vp->next) {
373 (tls_session->record_plus)(&tls_session->clean_in,
374 vp->vp_octets, vp->length);
377 tls_handshake_send(request, tls_session);
384 * See if there's a TLV in the response.
386 static int eappeap_check_tlv(REQUEST *request, const uint8_t *data)
388 const eap_packet_t *eap_packet = (const eap_packet_t *) data;
391 * Look for success or failure.
393 if ((eap_packet->code == PW_EAP_RESPONSE) &&
394 (eap_packet->data[0] == PW_EAP_TLV)) {
395 if (data[10] == EAP_TLV_SUCCESS) {
399 if (data[10] == EAP_TLV_FAILURE) {
400 RDEBUG2("Client rejected our response. The password is probably incorrect.");
410 * Use a reply packet to determine what to do.
412 static int process_reply(EAP_HANDLER *handler, tls_session_t *tls_session,
413 REQUEST *request, RADIUS_PACKET *reply)
415 int rcode = RLM_MODULE_REJECT;
417 peap_tunnel_t *t = tls_session->opaque;
419 if ((debug_flag > 0) && fr_log_fp) {
420 RDEBUG("Got tunneled reply RADIUS code %d",
423 debug_pair_list(reply->vps);
426 switch (reply->code) {
427 case PW_AUTHENTICATION_ACK:
428 RDEBUG2("Tunneled authentication was successful.");
429 t->status = PEAP_STATUS_SENT_TLV_SUCCESS;
430 eappeap_success(handler, tls_session);
431 rcode = RLM_MODULE_HANDLED;
434 * If we've been told to use the attributes from
435 * the reply, then do so.
437 * WARNING: This may leak information about the
440 if (t->use_tunneled_reply) {
441 RDEBUG2("Saving tunneled attributes for later");
444 * Clean up the tunneled reply.
446 pairdelete(&reply->vps, PW_PROXY_STATE, 0);
447 pairdelete(&reply->vps, PW_EAP_MESSAGE, 0);
448 pairdelete(&reply->vps, PW_MESSAGE_AUTHENTICATOR, 0);
451 * Delete MPPE keys & encryption policy. We don't
454 pairdelete(&reply->vps, 7, VENDORPEC_MICROSOFT);
455 pairdelete(&reply->vps, 8, VENDORPEC_MICROSOFT);
456 pairdelete(&reply->vps, 16, VENDORPEC_MICROSOFT);
457 pairdelete(&reply->vps, 17, VENDORPEC_MICROSOFT);
459 t->accept_vps = reply->vps;
464 case PW_AUTHENTICATION_REJECT:
465 RDEBUG2("Tunneled authentication was rejected.");
466 t->status = PEAP_STATUS_SENT_TLV_FAILURE;
467 eappeap_failure(handler, tls_session);
468 rcode = RLM_MODULE_HANDLED;
471 case PW_ACCESS_CHALLENGE:
472 RDEBUG2("Got tunneled Access-Challenge");
475 * Keep the State attribute, if necessary.
477 * Get rid of the old State, too.
480 pairmove2(&t->state, &(reply->vps), PW_STATE, 0);
483 * PEAP takes only EAP-Message attributes inside
484 * of the tunnel. Any Reply-Message in the
485 * Access-Challenge is ignored.
488 pairmove2(&vp, &(reply->vps), PW_EAP_MESSAGE, 0);
491 * Handle EAP-MSCHAP-V2, where Access-Accept's
492 * from the home server may contain MS-CHAP-Success,
493 * which the module turns into challenges, so that
494 * the client may respond to the challenge with
497 if (t->home_access_accept && t->use_tunneled_reply) {
498 RDEBUG2("Saving tunneled attributes for later");
501 * Clean up the tunneled reply.
503 pairdelete(&reply->vps, PW_PROXY_STATE, 0);
504 pairdelete(&reply->vps, PW_MESSAGE_AUTHENTICATOR, 0);
506 t->accept_vps = reply->vps;
511 * Handle the ACK, by tunneling any necessary reply
512 * VP's back to the client.
515 vp2eap(request, tls_session, vp);
519 rcode = RLM_MODULE_HANDLED;
523 RDEBUG2("Unknown RADIUS packet type %d: rejecting tunneled user", reply->code);
524 rcode = RLM_MODULE_REJECT;
533 * Do post-proxy processing,
535 static int eappeap_postproxy(EAP_HANDLER *handler, void *data)
538 tls_session_t *tls_session = (tls_session_t *) data;
539 REQUEST *fake, *request = handler->request;
541 rad_assert(request != NULL);
542 RDEBUG2("Passing reply from proxy back into the tunnel.");
545 * If there was a fake request associated with the proxied
546 * request, do more processing of it.
548 fake = (REQUEST *) request_data_get(handler->request,
549 handler->request->proxy,
550 REQUEST_DATA_EAP_MSCHAP_TUNNEL_CALLBACK);
553 * Do the callback, if it exists, and if it was a success.
555 if (fake && (handler->request->proxy_reply->code == PW_AUTHENTICATION_ACK)) {
556 peap_tunnel_t *t = tls_session->opaque;
558 t->home_access_accept = TRUE;
563 rad_assert(fake->packet == NULL);
564 fake->packet = request->proxy;
565 fake->packet->src_ipaddr = request->packet->src_ipaddr;
566 request->proxy = NULL;
568 rad_assert(fake->reply == NULL);
569 fake->reply = request->proxy_reply;
570 request->proxy_reply = NULL;
572 if ((debug_flag > 0) && fr_log_fp) {
573 fprintf(fr_log_fp, "server %s {\n", fake->server);
577 * Perform a post-auth stage, which will get the EAP
580 fake->options &= ~RAD_REQUEST_OPTION_PROXY_EAP;
581 RDEBUG2("Passing reply back for EAP-MS-CHAP-V2");
582 module_post_proxy(0, fake);
585 * FIXME: If rcode returns fail, do something
588 rcode = rad_postauth(fake);
590 if ((debug_flag > 0) && fr_log_fp) {
591 fprintf(fr_log_fp, "} # server %s\n", fake->server);
593 RDEBUG("Final reply from tunneled session code %d",
596 debug_pair_list(fake->reply->vps);
602 request->proxy = fake->packet;
604 request->proxy_reply = fake->reply;
608 * And we're done with this request.
612 case RLM_MODULE_FAIL:
614 eaptls_fail(handler, 0);
618 default: /* Don't Do Anything */
619 RDEBUG2("Got reply %d", request->proxy_reply->code);
623 request_free(&fake); /* robust if fake == NULL */
626 * If there was no EAP-Message in the reply packet, then
627 * we know that we're supposed to re-run the "authenticate"
628 * stage, in order to get the right kind of handling...
632 * Process the reply from the home server.
635 rcode = process_reply(handler, tls_session, handler->request,
636 handler->request->proxy_reply);
639 * The proxy code uses the reply from the home server as
640 * the basis for the reply to the NAS. We don't want that,
641 * so we toss it, after we've had our way with it.
643 pairfree(&handler->request->proxy_reply->vps);
646 case RLM_MODULE_REJECT:
647 RDEBUG2("Reply was rejected");
648 eaptls_fail(handler, 0);
651 case RLM_MODULE_HANDLED:
652 RDEBUG2("Reply was handled");
653 eaptls_request(handler->eap_ds, tls_session);
657 RDEBUG2("Reply was OK");
660 * Success: Automatically return MPPE keys.
662 return eaptls_success(handler, 0);
665 RDEBUG2("Reply was unknown.");
669 eaptls_fail(handler, 0);
676 static void my_request_free(void *data)
678 REQUEST *request = (REQUEST *)data;
680 request_free(&request);
685 static const char *peap_state(peap_tunnel_t *t)
688 case PEAP_STATUS_TUNNEL_ESTABLISHED:
689 return "TUNNEL ESTABLISHED";
690 case PEAP_STATUS_WAIT_FOR_SOH_RESPONSE:
691 return "WAITING FOR SOH RESPONSE";
692 case PEAP_STATUS_INNER_IDENTITY_REQ_SENT:
693 return "WAITING FOR INNER IDENTITY";
694 case PEAP_STATUS_SENT_TLV_SUCCESS:
695 return "send tlv success";
696 case PEAP_STATUS_SENT_TLV_FAILURE:
697 return "send tlv failure";
698 case PEAP_STATUS_PHASE2_INIT:
699 return "phase2_init";
700 case PEAP_STATUS_PHASE2:
708 static void print_tunneled_data(const uint8_t *data, size_t data_len)
712 if ((debug_flag > 2) && fr_log_fp) {
713 for (i = 0; i < data_len; i++) {
714 if ((i & 0x0f) == 0) fprintf(fr_log_fp, " PEAP tunnel data in %02x: ", (int) i);
716 fprintf(fr_log_fp, "%02x ", data[i]);
718 if ((i & 0x0f) == 0x0f) fprintf(fr_log_fp, "\n");
720 if ((data_len & 0x0f) != 0) fprintf(fr_log_fp, "\n");
726 * Process the pseudo-EAP contents of the tunneled data.
728 int eappeap_process(EAP_HANDLER *handler, tls_session_t *tls_session)
730 peap_tunnel_t *t = tls_session->opaque;
733 int rcode = RLM_MODULE_REJECT;
735 unsigned int data_len;
737 REQUEST *request = handler->request;
738 EAP_DS *eap_ds = handler->eap_ds;
740 rad_assert(request != NULL);
743 * Just look at the buffer directly, without doing
744 * record_minus. This lets us avoid another data copy.
746 data_len = tls_session->clean_out.used;
747 tls_session->clean_out.used = 0;
748 data = tls_session->clean_out.data;
750 RDEBUG2("Peap state %s", peap_state(t));
752 if ((t->status != PEAP_STATUS_TUNNEL_ESTABLISHED) &&
753 !eapmessage_verify(request, data, data_len)) {
754 RDEBUG2("FAILED processing PEAP: Tunneled data is invalid.");
755 if (debug_flag > 2) print_tunneled_data(data, data_len);
756 return RLM_MODULE_REJECT;
760 case PEAP_STATUS_TUNNEL_ESTABLISHED:
761 /* FIXME: should be no data in the buffer here, check & assert? */
763 if (SSL_session_reused(tls_session->ssl)) {
764 RDEBUG2("Skipping Phase2 because of session resumption");
765 t->session_resumption_state = PEAP_RESUMPTION_YES;
767 t->status = PEAP_STATUS_WAIT_FOR_SOH_RESPONSE;
768 RDEBUG2("Requesting SoH from client");
769 eappeap_soh(handler, tls_session);
770 return RLM_MODULE_HANDLED;
772 /* we're good, send success TLV */
773 t->status = PEAP_STATUS_SENT_TLV_SUCCESS;
774 eappeap_success(handler, tls_session);
777 /* send an identity request */
778 t->session_resumption_state = PEAP_RESUMPTION_NO;
779 t->status = PEAP_STATUS_INNER_IDENTITY_REQ_SENT;
780 eappeap_identity(handler, tls_session);
782 return RLM_MODULE_HANDLED;
784 case PEAP_STATUS_INNER_IDENTITY_REQ_SENT:
785 /* we're expecting an identity response */
786 if (data[0] != PW_EAP_IDENTITY) {
787 RDEBUG("Expected EAP-Identity, got something else.");
788 return RLM_MODULE_REJECT;
791 if (data_len >= sizeof(t->username->vp_strvalue)) {
792 RDEBUG("EAP-Identity is too long");
793 return RLM_MODULE_REJECT;
799 t->username = pairmake("User-Name", "", T_OP_EQ);
800 rad_assert(t->username != NULL);
802 memcpy(t->username->vp_strvalue, data + 1, data_len - 1);
803 t->username->length = data_len - 1;
804 t->username->vp_strvalue[t->username->length] = 0;
805 RDEBUG("Got inner identity '%s'", t->username->vp_strvalue);
807 t->status = PEAP_STATUS_WAIT_FOR_SOH_RESPONSE;
808 RDEBUG2("Requesting SoH from client");
809 eappeap_soh(handler, tls_session);
810 return RLM_MODULE_HANDLED;
812 t->status = PEAP_STATUS_PHASE2_INIT;
815 case PEAP_STATUS_WAIT_FOR_SOH_RESPONSE:
816 fake = request_alloc_fake(request);
817 rad_assert(fake->packet->vps == NULL);
818 fake->packet->vps = eapsoh_verify(request, data, data_len);
819 setup_fake_request(request, fake, t);
821 if (t->soh_virtual_server) {
822 fake->server = t->soh_virtual_server;
824 RDEBUG("Sending SoH request to server %s", fake->server ? fake->server : "NULL");
825 debug_pair_list(fake->packet->vps);
826 RDEBUG("server %s {", fake->server);
827 rad_authenticate(fake);
828 RDEBUG("} # server %s", fake->server);
829 RDEBUG("Got SoH reply");
830 debug_pair_list(fake->reply->vps);
832 if (fake->reply->code != PW_AUTHENTICATION_ACK) {
833 RDEBUG2("SoH was rejected");
835 t->status = PEAP_STATUS_SENT_TLV_FAILURE;
836 eappeap_failure(handler, tls_session);
837 return RLM_MODULE_HANDLED;
840 /* save the SoH VPs */
841 t->soh_reply_vps = fake->reply->vps;
842 fake->reply->vps = NULL;
845 if (t->session_resumption_state == PEAP_RESUMPTION_YES) {
846 /* we're good, send success TLV */
847 t->status = PEAP_STATUS_SENT_TLV_SUCCESS;
848 eappeap_success(handler, tls_session);
849 return RLM_MODULE_HANDLED;
852 t->status = PEAP_STATUS_PHASE2_INIT;
857 * If we authenticated the user, then it's OK.
859 case PEAP_STATUS_SENT_TLV_SUCCESS:
860 if (eappeap_check_tlv(request, data)) {
862 return RLM_MODULE_OK;
866 * Otherwise, the client rejected the session
867 * resumption. If the session is being re-used,
868 * we need to do a full authentication.
870 * We do this by sending an EAP-Identity request
871 * inside of the PEAP tunnel.
873 if (t->session_resumption_state == PEAP_RESUMPTION_YES) {
874 RDEBUG2("Client rejected session resumption. Re-starting full authentication");
877 * Mark session resumption status.
879 t->status = PEAP_STATUS_INNER_IDENTITY_REQ_SENT;
880 t->session_resumption_state = PEAP_RESUMPTION_NO;
882 eappeap_identity(handler, tls_session);
883 return RLM_MODULE_HANDLED;
886 RDEBUG2("We sent a success, but received something weird in return.");
887 return RLM_MODULE_REJECT;
890 * Damned if I know why the clients continue sending EAP
891 * packets after we told them to f*ck off.
893 case PEAP_STATUS_SENT_TLV_FAILURE:
894 RDEBUG(" The users session was previously rejected: returning reject (again.)");
895 RDEBUG(" *** This means you need to read the PREVIOUS messages in the debug output");
896 RDEBUG(" *** to find out the reason why the user was rejected.");
897 RDEBUG(" *** Look for \"reject\" or \"fail\". Those earlier messages will tell you.");
898 RDEBUG(" *** what went wrong, and how to fix the problem.");
899 return RLM_MODULE_REJECT;
901 case PEAP_STATUS_PHASE2_INIT:
902 RDEBUG("In state machine in phase2 init?");
904 case PEAP_STATUS_PHASE2:
908 RDEBUG2("Unhandled state in peap");
909 return RLM_MODULE_REJECT;
912 fake = request_alloc_fake(request);
914 rad_assert(fake->packet->vps == NULL);
918 * If we're in PHASE2_INIT, the phase2 method hasn't been
919 * sent an Identity packet yet; do so from the stored
920 * username and this will kick off the phase2 eap method
923 case PEAP_STATUS_PHASE2_INIT: {
924 int len = t->username->length + EAP_HEADER_LEN + 1;
926 t->status = PEAP_STATUS_PHASE2;
928 vp = paircreate(PW_EAP_MESSAGE, 0, PW_TYPE_OCTETS);
930 vp->vp_octets[0] = PW_EAP_RESPONSE;
931 vp->vp_octets[1] = eap_ds->response->id;
932 vp->vp_octets[2] = (len >> 8) & 0xff;
933 vp->vp_octets[3] = len & 0xff;
934 vp->vp_octets[4] = PW_EAP_IDENTITY;
936 memcpy(vp->vp_octets + EAP_HEADER_LEN + 1, t->username->vp_strvalue, t->username->length);
939 pairadd(&fake->packet->vps, vp);
941 if (t->default_eap_type != 0) {
942 RDEBUG2("Setting default EAP type for tunneled EAP session.");
943 vp = pairmake("EAP-Type", "0", T_OP_EQ);
944 vp->vp_integer = t->default_eap_type;
945 pairadd(&fake->config_items, vp);
949 case PEAP_STATUS_PHASE2:
950 fake->packet->vps = eap2vp(request, eap_ds, data, data_len);
951 if (!fake->packet->vps) {
953 RDEBUG2("Unable to convert tunneled EAP packet to internal server data structures");
954 return PW_AUTHENTICATION_REJECT;
959 RDEBUG("Invalid state change in PEAP.");
960 return PW_AUTHENTICATION_REJECT;
963 if ((debug_flag > 0) && fr_log_fp) {
964 RDEBUG("Got tunneled request");
966 debug_pair_list(fake->packet->vps);
968 fprintf(fr_log_fp, "server %s {\n",
969 (fake->server == NULL) ? "" : fake->server);
973 * Update other items in the REQUEST data structure.
977 * There's no User-Name in the tunneled session,
978 * so we add one here, by pulling it out of the
979 * EAP-Identity packet.
981 if ((data[0] == PW_EAP_IDENTITY) && (data_len > 1)) {
982 t->username = pairmake("User-Name", "", T_OP_EQ);
983 rad_assert(t->username != NULL);
985 memcpy(t->username->vp_strvalue, data + 1, data_len - 1);
986 t->username->length = data_len - 1;
987 t->username->vp_strvalue[t->username->length] = 0;
988 DEBUG2(" PEAP: Got tunneled identity of %s", t->username->vp_strvalue);
991 * If there's a default EAP type,
994 if (t->default_eap_type != 0) {
995 DEBUG2(" PEAP: Setting default EAP type for tunneled EAP session.");
996 vp = pairmake("EAP-Type", "0", T_OP_EQ);
997 vp->vp_integer = t->default_eap_type;
998 pairadd(&fake->config_items, vp);
1001 } /* else there WAS a t->username */
1003 setup_fake_request(request, fake, t);
1005 if ((vp = pairfind(request->config_items, PW_VIRTUAL_SERVER, 0)) != NULL) {
1006 fake->server = vp->vp_strvalue;
1008 } else if (t->virtual_server) {
1009 fake->server = t->virtual_server;
1011 } /* else fake->server == request->server */
1013 if ((debug_flag > 0) && fr_log_fp) {
1014 fprintf(fr_log_fp, "Sending tunneled request\n");
1016 debug_pair_list(fake->packet->vps);
1018 fprintf(fr_log_fp, "server %s {\n",
1019 (fake->server == NULL) ? "" : fake->server);
1023 * Call authentication recursively, which will
1024 * do PAP, CHAP, MS-CHAP, etc.
1026 rad_authenticate(fake);
1029 * Note that we don't do *anything* with the reply
1032 if ((debug_flag > 0) && fr_log_fp) {
1033 fprintf(fr_log_fp, "} # server %s\n",
1034 (fake->server == NULL) ? "" : fake->server);
1036 RDEBUG("Got tunneled reply code %d", fake->reply->code);
1038 debug_pair_list(fake->reply->vps);
1042 * Decide what to do with the reply.
1044 switch (fake->reply->code) {
1045 case 0: /* No reply code, must be proxied... */
1047 vp = pairfind(fake->config_items, PW_PROXY_TO_REALM, 0);
1050 eap_tunnel_data_t *tunnel;
1053 * The tunneled request was NOT handled,
1054 * it has to be proxied. This means that
1055 * the "authenticate" stage was never
1058 * If we are told to NOT proxy the
1059 * tunneled request as EAP, then this
1060 * means that we've got to decode it,
1061 * which means that we MUST run the
1062 * "authenticate" portion by hand, here.
1064 * Once the tunneled EAP session is ALMOST
1065 * done, THEN we proxy it...
1067 if (!t->proxy_tunneled_request_as_eap) {
1068 fake->options |= RAD_REQUEST_OPTION_PROXY_EAP;
1071 * Hmm... should we check for
1072 * Auth-Type & EAP-Message here?
1077 * Run the EAP authentication.
1079 DEBUG2(" PEAP: Calling authenticate in order to initiate tunneled EAP session.");
1080 rcode = module_authenticate(PW_AUTHTYPE_EAP, fake);
1081 if (rcode == RLM_MODULE_OK) {
1083 * Authentication succeeded! Rah!
1085 fake->reply->code = PW_AUTHENTICATION_ACK;
1089 if (rcode != RLM_MODULE_HANDLED) {
1090 DEBUG2(" PEAP: Can't handle the return code %d", rcode);
1091 rcode = RLM_MODULE_REJECT;
1096 * The module decided it wasn't
1097 * done. Handle it like normal.
1099 if ((fake->options & RAD_REQUEST_OPTION_PROXY_EAP) == 0) {
1100 DEBUG2(" PEAP: Cancelling proxy to realm %s until the tunneled EAP session has been established", vp->vp_strvalue);
1105 * The module has decoded the
1106 * EAP-Message into another set
1109 pairdelete(&fake->packet->vps,
1113 DEBUG2(" PEAP: Tunneled authentication will be proxied to %s", vp->vp_strvalue);
1116 * Tell the original request that it's going
1119 pairmove2(&(request->config_items),
1120 &(fake->config_items),
1121 PW_PROXY_TO_REALM, 0);
1124 * Seed the proxy packet with the
1127 rad_assert(request->proxy == NULL);
1128 request->proxy = fake->packet;
1129 memset(&request->proxy->src_ipaddr, 0,
1130 sizeof(request->proxy->src_ipaddr));
1131 memset(&request->proxy->src_ipaddr, 0,
1132 sizeof(request->proxy->src_ipaddr));
1133 request->proxy->src_port = 0;
1134 request->proxy->dst_port = 0;
1135 fake->packet = NULL;
1136 rad_free(&fake->reply);
1140 * Set up the callbacks for the tunnel
1142 tunnel = rad_malloc(sizeof(*tunnel));
1143 memset(tunnel, 0, sizeof(*tunnel));
1145 tunnel->tls_session = tls_session;
1146 tunnel->callback = eappeap_postproxy;
1149 * Associate the callback with the request.
1151 rcode = request_data_add(request,
1153 REQUEST_DATA_EAP_TUNNEL_CALLBACK,
1155 rad_assert(rcode == 0);
1158 * We're not proxying it as EAP, so we've got
1159 * to do the callback later.
1161 if ((fake->options & RAD_REQUEST_OPTION_PROXY_EAP) != 0) {
1162 DEBUG2(" PEAP: Remembering to do EAP-MS-CHAP-V2 post-proxy.");
1165 * rlm_eap.c has taken care of associating
1166 * the handler with the fake request.
1168 * So we associate the fake request with
1171 rcode = request_data_add(request,
1173 REQUEST_DATA_EAP_MSCHAP_TUNNEL_CALLBACK,
1174 fake, my_request_free);
1175 rad_assert(rcode == 0);
1178 * Do NOT free the fake request!
1180 return RLM_MODULE_UPDATED;
1184 * Didn't authenticate the packet, but
1185 * we're proxying it.
1187 rcode = RLM_MODULE_UPDATED;
1190 #endif /* WITH_PROXY */
1192 DEBUG2(" PEAP: Unknown RADIUS packet type %d: rejecting tunneled user", fake->reply->code);
1193 rcode = RLM_MODULE_REJECT;
1199 rcode = process_reply(handler, tls_session, request,
1205 request_free(&fake);
1210 static int setup_fake_request(REQUEST *request, REQUEST *fake, peap_tunnel_t *t) {
1214 * Tell the request that it's a fake one.
1216 vp = pairmake("Freeradius-Proxied-To", "127.0.0.1", T_OP_EQ);
1218 pairadd(&fake->packet->vps, vp);
1222 vp = paircopy(t->username);
1223 pairadd(&fake->packet->vps, vp);
1224 fake->username = pairfind(fake->packet->vps, PW_USER_NAME, 0);
1225 RDEBUG2("Setting User-Name to %s", fake->username->vp_strvalue);
1227 RDEBUG2("No tunnel username (SSL resumption?)");
1232 * Add the State attribute, too, if it exists.
1235 vp = paircopy(t->state);
1236 if (vp) pairadd(&fake->packet->vps, vp);
1240 * If this is set, we copy SOME of the request attributes
1241 * from outside of the tunnel to inside of the tunnel.
1243 * We copy ONLY those attributes which do NOT already
1244 * exist in the tunneled request.
1246 * This code is copied from ../rlm_eap_ttls/ttls.c
1248 if (t->copy_request_to_tunnel) {
1251 for (vp = request->packet->vps; vp != NULL; vp = vp->next) {
1253 * The attribute is a server-side thingy,
1256 if ((vp->attribute > 255) &&
1257 (((vp->attribute >> 16) & 0xffff) == 0)) {
1262 * The outside attribute is already in the
1263 * tunnel, don't copy it.
1265 * This works for BOTH attributes which
1266 * are originally in the tunneled request,
1267 * AND attributes which are copied there
1270 if (pairfind(fake->packet->vps, vp->attribute, vp->vendor)) {
1275 * Some attributes are handled specially.
1277 switch (vp->attribute) {
1279 * NEVER copy Message-Authenticator,
1280 * EAP-Message, or State. They're
1281 * only for outside of the tunnel.
1284 case PW_USER_PASSWORD:
1285 case PW_CHAP_PASSWORD:
1286 case PW_CHAP_CHALLENGE:
1287 case PW_PROXY_STATE:
1288 case PW_MESSAGE_AUTHENTICATOR:
1289 case PW_EAP_MESSAGE:
1295 * By default, copy it over.
1302 * Don't copy from the head, we've already
1305 copy = paircopy2(vp, vp->attribute, vp->vendor);
1306 pairadd(&fake->packet->vps, copy);