src/modules/rlm_eap/types/rlm_eap_peap/peap.c

   1 /*
   2  * peap.c contains the interfaces that are called from eap
   3  *
   4  * Version:     $Id$
   5  *
   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.
  10  *
  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.
  15  *
  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
  19  *
  20  *   Copyright 2003 Alan DeKok <aland@freeradius.org>
  21  *   Copyright 2006 The FreeRADIUS server project
  22  */
  23
  24 #include <freeradius-devel/ident.h>
  25 RCSID("$Id$")
  26
  27 #include "eap_peap.h"
  28
  29 /*
  30  *      Send protected EAP-Failure
  31  *
  32  *       Result-TLV = Failure
  33  */
  34 static int eappeap_failure(EAP_HANDLER *handler, tls_session_t *tls_session)
  35 {
  36         uint8_t tlv_packet[11];
  37
  38         DEBUG2("  rlm_eap_peap: FAILURE");
  39
  40         tlv_packet[0] = PW_EAP_REQUEST;
  41         tlv_packet[1] = handler->eap_ds->response->id +1;
  42         tlv_packet[2] = 0;
  43         tlv_packet[3] = 11;     /* length of this packet */
  44         tlv_packet[4] = PW_EAP_TLV;
  45         tlv_packet[5] = 0x80;
  46         tlv_packet[6] = EAP_TLV_ACK_RESULT;
  47         tlv_packet[7] = 0;
  48         tlv_packet[8] = 2;      /* length of the data portion */
  49         tlv_packet[9] = 0;
  50         tlv_packet[10] = EAP_TLV_FAILURE;
  51
  52         (tls_session->record_plus)(&tls_session->clean_in, tlv_packet, 11);
  53
  54         /*
  55          *      FIXME: Check the return code.
  56          */
  57         tls_handshake_send(tls_session);
  58
  59         return 1;
  60 }
  61
  62
  63 /*
  64  *      Send protected EAP-Success
  65  *
  66  *       Result-TLV = Success
  67  */
  68 static int eappeap_success(EAP_HANDLER *handler, tls_session_t *tls_session)
  69 {
  70         uint8_t tlv_packet[11];
  71
  72         DEBUG2("  rlm_eap_peap: SUCCESS");
  73
  74         tlv_packet[0] = PW_EAP_REQUEST;
  75         tlv_packet[1] = handler->eap_ds->response->id +1;
  76         tlv_packet[2] = 0;
  77         tlv_packet[3] = 11;     /* length of this packet */
  78         tlv_packet[4] = PW_EAP_TLV;
  79         tlv_packet[5] = 0x80;   /* mandatory AVP */
  80         tlv_packet[6] = EAP_TLV_ACK_RESULT;
  81         tlv_packet[7] = 0;
  82         tlv_packet[8] = 2;      /* length of the data portion */
  83         tlv_packet[9] = 0;
  84         tlv_packet[10] = EAP_TLV_SUCCESS;
  85
  86         (tls_session->record_plus)(&tls_session->clean_in, tlv_packet, 11);
  87
  88         /*
  89          *      FIXME: Check the return code.
  90          */
  91         tls_handshake_send(tls_session);
  92
  93         return 1;
  94 }
  95
  96
  97 /*
  98  *      Verify the tunneled EAP message.
  99  */
 100 static int eapmessage_verify(const uint8_t *data, unsigned int data_len)
 101 {
 102         const eap_packet_t *eap_packet = (const eap_packet_t *) data;
 103         uint8_t eap_type;
 104         char buffer[256];
 105
 106         if (!data || (data_len <= 1)) {
 107                 return 0;
 108         }
 109
 110         eap_type = *data;
 111         switch (eap_type) {
 112         case PW_EAP_IDENTITY:
 113                 DEBUG2("  rlm_eap_peap: Identity - %*s",
 114                        data_len - 1, data + 1);
 115                 return 1;
 116                 break;
 117
 118                 /*
 119                  *      If the first byte of the packet is
 120                  *      EAP-Response, and the EAP data is a TLV,
 121                  *      then it looks OK...
 122                  */
 123         case PW_EAP_RESPONSE:
 124                 if (eap_packet->data[0] == PW_EAP_TLV) {
 125                         DEBUG2("  rlm_eap_peap: Received EAP-TLV response.");
 126                         return 1;
 127                 }
 128                 DEBUG2("  rlm_eap_peap: Got something weird.");
 129                 break;
 130
 131
 132                 /*
 133                  *      We normally do Microsoft MS-CHAPv2 (26), versus
 134                  *      Cisco MS-CHAPv2 (29).
 135                  */
 136         case PW_EAP_MSCHAPV2:
 137         default:
 138                 DEBUG2("  rlm_eap_peap: EAP type %s",
 139                        eaptype_type2name(eap_type,
 140                                          buffer, sizeof(buffer)));
 141                 return 1;
 142                 break;
 143         }
 144
 145         return 0;
 146 }
 147
 148 /*
 149  *      Convert a pseudo-EAP packet to a list of VALUE_PAIR's.
 150  */
 151 static VALUE_PAIR *eap2vp(EAP_DS *eap_ds,
 152                           const uint8_t *data, size_t data_len)
 153 {
 154         size_t total;
 155         VALUE_PAIR *vp = NULL, *head, **tail;
 156
 157         if (data_len > 65535) return NULL; /* paranoia */
 158
 159         vp = paircreate(PW_EAP_MESSAGE, PW_TYPE_OCTETS);
 160         if (!vp) {
 161                 DEBUG2("  rlm_eap_peap: Failure in creating VP");
 162                 return NULL;
 163         }
 164
 165         total = data_len;
 166         if (total > 249) total = 249;
 167
 168         /*
 169          *      Hand-build an EAP packet from the crap in PEAP version 0.
 170          */
 171         vp->vp_octets[0] = PW_EAP_RESPONSE;
 172         vp->vp_octets[1] = eap_ds->response->id;
 173         vp->vp_octets[2] = (data_len + EAP_HEADER_LEN) >> 8;
 174         vp->vp_octets[3] = (data_len + EAP_HEADER_LEN) & 0xff;
 175
 176         memcpy(vp->vp_octets + EAP_HEADER_LEN, data, total);
 177         vp->length = EAP_HEADER_LEN + total;
 178
 179         head = vp;
 180         tail = &(vp->next);
 181         while (total < data_len) {
 182                 int vp_len;
 183
 184
 185                 vp = paircreate(PW_EAP_MESSAGE, PW_TYPE_OCTETS);
 186                 if (!vp) {
 187                         DEBUG2("  rlm_eap_peap: Failure in creating VP");
 188                         pairfree(&head);
 189                         return NULL;
 190                 }
 191                 vp_len = (data_len - total);
 192                 if (vp_len > 253) vp_len = 253;
 193
 194                 memcpy(vp->vp_octets, data + total, vp_len);
 195                 vp->length = vp_len;
 196
 197                 total += vp_len;
 198                 *tail = vp;
 199                 tail = &(vp->next);
 200         }
 201
 202         return head;
 203 }
 204
 205
 206 /*
 207  *      Convert a list of VALUE_PAIR's to an EAP packet, through the
 208  *      simple expedient of dumping the EAP message
 209  */
 210 static int vp2eap(tls_session_t *tls_session, VALUE_PAIR *vp)
 211 {
 212         /*
 213          *      Skip the id, code, and length.  Just write the EAP
 214          *      type & data to the client.
 215          */
 216 #ifndef NDEBUG
 217         if ((debug_flag > 2) && fr_log_fp) {
 218                 size_t i, total;
 219                 VALUE_PAIR *this;
 220
 221                 total = 0;
 222
 223                 for (this = vp; this != NULL; this = this->next) {
 224                         int start = 0;
 225
 226                         if (this == vp) start = EAP_HEADER_LEN;
 227
 228                         for (i = start; i < vp->length; i++) {
 229                                 if ((total & 0x0f) == 0) fprintf(fr_log_fp, "  PEAP tunnel data out %04x: ", total);
 230
 231                                 fprintf(fr_log_fp, "%02x ", vp->vp_octets[i]);
 232
 233                                 if ((total & 0x0f) == 0x0f) fprintf(fr_log_fp, "\n");
 234                                 total++;
 235                         }
 236                 }
 237                 if ((total & 0x0f) != 0) fprintf(fr_log_fp, "\n");
 238         }
 239 #endif
 240
 241         /*
 242          *      Send the EAP data, WITHOUT the header.
 243          */
 244         (tls_session->record_plus)(&tls_session->clean_in,
 245                                    vp->vp_octets + EAP_HEADER_LEN,
 246                                    vp->length - EAP_HEADER_LEN);
 247
 248         /*
 249          *      Send the rest of the EAP data.
 250          */
 251         for (vp = vp->next; vp != NULL; vp = vp->next) {
 252                 (tls_session->record_plus)(&tls_session->clean_in,
 253                                            vp->vp_octets, vp->length);
 254         }
 255
 256         tls_handshake_send(tls_session);
 257
 258         return 1;
 259 }
 260
 261
 262 /*
 263  *      See if there's a TLV in the response.
 264  */
 265 static int eappeap_check_tlv(const uint8_t *data)
 266 {
 267         const eap_packet_t *eap_packet = (const eap_packet_t *) data;
 268
 269         /*
 270          *      Look for success or failure.
 271          */
 272         if ((eap_packet->code == PW_EAP_RESPONSE) &&
 273             (eap_packet->data[0] == PW_EAP_TLV)) {
 274                 if (data[10] == EAP_TLV_SUCCESS) {
 275                         return 1;
 276                 }
 277
 278                 if (data[10] == EAP_TLV_FAILURE) {
 279                         DEBUG2("  rlm_eap_peap: Client rejected our response.  The password is probably incorrect.");
 280                         return 0;
 281                 }
 282         }
 283
 284         return 0;
 285 }
 286
 287
 288 /*
 289  *      Use a reply packet to determine what to do.
 290  */
 291 static int process_reply(EAP_HANDLER *handler, tls_session_t *tls_session,
 292                          UNUSED REQUEST *request, RADIUS_PACKET *reply)
 293 {
 294         int rcode = RLM_MODULE_REJECT;
 295         VALUE_PAIR *vp;
 296         peap_tunnel_t *t = tls_session->opaque;
 297
 298 #ifndef NDEBUG
 299         if ((debug_flag > 0) && fr_log_fp) {
 300                 fprintf(fr_log_fp, "  PEAP: Processing from tunneled session code %p %d\n",
 301                        reply, reply->code);
 302
 303                 debug_pair_list(reply->vps);
 304         }
 305 #endif
 306
 307         switch (reply->code) {
 308         case PW_AUTHENTICATION_ACK:
 309                 DEBUG2("  PEAP: Tunneled authentication was successful.");
 310                 t->status = PEAP_STATUS_SENT_TLV_SUCCESS;
 311                 eappeap_success(handler, tls_session);
 312                 rcode = RLM_MODULE_HANDLED;
 313
 314                 /*
 315                  *      If we've been told to use the attributes from
 316                  *      the reply, then do so.
 317                  *
 318                  *      WARNING: This may leak information about the
 319                  *      tunneled user!
 320                  */
 321                 if (t->use_tunneled_reply) {
 322                         DEBUG2("  Saving tunneled attributes for later");
 323
 324                         /*
 325                          *      Clean up the tunneled reply.
 326                          */
 327                         pairdelete(&reply->vps, PW_PROXY_STATE);
 328                         pairdelete(&reply->vps, PW_EAP_MESSAGE);
 329                         pairdelete(&reply->vps, PW_MESSAGE_AUTHENTICATOR);
 330
 331                         t->accept_vps = reply->vps;
 332                         reply->vps = NULL;
 333                 }
 334                 break;
 335
 336         case PW_AUTHENTICATION_REJECT:
 337                 DEBUG2("  PEAP: Tunneled authentication was rejected.");
 338                 t->status = PEAP_STATUS_SENT_TLV_FAILURE;
 339                 eappeap_failure(handler, tls_session);
 340                 rcode = RLM_MODULE_HANDLED;
 341                 break;
 342
 343         case PW_ACCESS_CHALLENGE:
 344                 DEBUG2("  PEAP: Got tunneled Access-Challenge");
 345
 346                 /*
 347                  *      Keep the State attribute, if necessary.
 348                  *
 349                  *      Get rid of the old State, too.
 350                  */
 351                 pairfree(&t->state);
 352                 pairmove2(&t->state, &(reply->vps), PW_STATE);
 353
 354                 /*
 355                  *      PEAP takes only EAP-Message attributes inside
 356                  *      of the tunnel.  Any Reply-Message in the
 357                  *      Access-Challenge is ignored.
 358                  */
 359                 vp = NULL;
 360                 pairmove2(&vp, &(reply->vps), PW_EAP_MESSAGE);
 361
 362                 /*
 363                  *      Handle EAP-MSCHAP-V2, where Access-Accept's
 364                  *      from the home server may contain MS-CHAP-Success,
 365                  *      which the module turns into challenges, so that
 366                  *      the client may respond to the challenge with
 367                  *      an "ack" packet.
 368                  */
 369                 if (t->home_access_accept && t->use_tunneled_reply) {
 370                         DEBUG2("  Saving tunneled attributes for later");
 371
 372                         /*
 373                          *      Clean up the tunneled reply.
 374                          */
 375                         pairdelete(&reply->vps, PW_PROXY_STATE);
 376                         pairdelete(&reply->vps, PW_MESSAGE_AUTHENTICATOR);
 377
 378                         t->accept_vps = reply->vps;
 379                         reply->vps = NULL;
 380                 }
 381
 382                 /*
 383                  *      Handle the ACK, by tunneling any necessary reply
 384                  *      VP's back to the client.
 385                  */
 386                 if (vp) {
 387                         vp2eap(tls_session, vp);
 388                         pairfree(&vp);
 389                 }
 390
 391                 rcode = RLM_MODULE_HANDLED;
 392                 break;
 393
 394         default:
 395                 DEBUG2("  PEAP: Unknown RADIUS packet type %d: rejecting tunneled user", reply->code);
 396                 rcode = RLM_MODULE_REJECT;
 397                 break;
 398         }
 399
 400         return rcode;
 401 }
 402
 403
 404 /*
 405  *      Do post-proxy processing,
 406  */
 407 static int eappeap_postproxy(EAP_HANDLER *handler, void *data)
 408 {
 409         int rcode;
 410         tls_session_t *tls_session = (tls_session_t *) data;
 411         REQUEST *fake;
 412
 413         DEBUG2("  PEAP: Passing reply from proxy back into the tunnel.");
 414
 415         /*
 416          *      If there was a fake request associated with the proxied
 417          *      request, do more processing of it.
 418          */
 419         fake = (REQUEST *) request_data_get(handler->request,
 420                                             handler->request->proxy,
 421                                             REQUEST_DATA_EAP_MSCHAP_TUNNEL_CALLBACK);
 422
 423         /*
 424          *      Do the callback, if it exists, and if it was a success.
 425          */
 426         if (fake && (handler->request->proxy_reply->code == PW_AUTHENTICATION_ACK)) {
 427                 REQUEST *request = handler->request;
 428                 peap_tunnel_t *t = tls_session->opaque;
 429
 430                 t->home_access_accept = TRUE;
 431
 432                 /*
 433                  *      Terrible hacks.
 434                  */
 435                 rad_assert(fake->packet == NULL);
 436                 fake->packet = request->proxy;
 437                 fake->packet->src_ipaddr = request->packet->src_ipaddr;
 438                 request->proxy = NULL;
 439
 440                 rad_assert(fake->reply == NULL);
 441                 fake->reply = request->proxy_reply;
 442                 request->proxy_reply = NULL;
 443
 444                 /*
 445                  *      Perform a post-auth stage, which will get the EAP
 446                  *      handler, too...
 447                  */
 448                 fake->options &= ~RAD_REQUEST_OPTION_PROXY_EAP;
 449                 DEBUG2("  PEAP: Passing reply back for EAP-MS-CHAP-V2");
 450                 rcode = module_post_proxy(0, fake);
 451
 452                 /*
 453                  *      FIXME: If rcode returns fail, do something
 454                  *      intelligent...
 455                  */
 456                 rcode = rad_postauth(fake);
 457
 458 #ifndef NDEBUG
 459                 if ((debug_flag > 0) && fr_log_fp) {
 460                         fprintf(fr_log_fp, "  PEAP: Final reply from tunneled session code %d\n",
 461                                fake->reply->code);
 462
 463                         debug_pair_list(fake->reply->vps);
 464                 }
 465 #endif
 466
 467                 /*
 468                  *      Terrible hacks.
 469                  */
 470                 request->proxy = fake->packet;
 471                 fake->packet = NULL;
 472                 request->proxy_reply = fake->reply;
 473                 fake->reply = NULL;
 474
 475                 /*
 476                  *      And we're done with this request.
 477                  */
 478
 479                 switch (rcode) {
 480                 case RLM_MODULE_FAIL:
 481                         request_free(&fake);
 482                         eaptls_fail(handler->eap_ds, 0);
 483                         return 0;
 484                         break;
 485
 486                 default:  /* Don't Do Anything */
 487                         DEBUG2(" PEAP: Got reply %d",
 488                                request->proxy_reply->code);
 489                         break;
 490                 }
 491         }
 492         request_free(&fake);    /* robust if fake == NULL */
 493
 494         /*
 495          *      If there was no EAP-Message in the reply packet, then
 496          *      we know that we're supposed to re-run the "authenticate"
 497          *      stage, in order to get the right kind of handling...
 498          */
 499
 500         /*
 501          *      Process the reply from the home server.
 502          */
 503
 504         rcode = process_reply(handler, tls_session, handler->request,
 505                               handler->request->proxy_reply);
 506
 507         /*
 508          *      The proxy code uses the reply from the home server as
 509          *      the basis for the reply to the NAS.  We don't want that,
 510          *      so we toss it, after we've had our way with it.
 511          */
 512         pairfree(&handler->request->proxy_reply->vps);
 513
 514         switch (rcode) {
 515         case RLM_MODULE_REJECT:
 516                 DEBUG2("  PEAP: Reply was rejected");
 517                 eaptls_fail(handler->eap_ds, 0);
 518                 return 0;
 519
 520         case RLM_MODULE_HANDLED:
 521                 DEBUG2("  PEAP: Reply was handled");
 522                 eaptls_request(handler->eap_ds, tls_session);
 523                 return 1;
 524
 525         case RLM_MODULE_OK:
 526                 DEBUG2("  PEAP: Reply was OK");
 527                 eaptls_success(handler->eap_ds, 0);
 528                 eaptls_gen_mppe_keys(&handler->request->reply->vps,
 529                                      tls_session->ssl,
 530                                      "client EAP encryption");
 531                 return 1;
 532
 533         default:
 534                 DEBUG2("  PEAP: Reply was unknown.");
 535                 break;
 536         }
 537
 538         eaptls_fail(handler->eap_ds, 0);
 539         return 0;
 540 }
 541
 542 /*
 543  *      Free a request.
 544  */
 545 static void my_request_free(void *data)
 546 {
 547         REQUEST *request = (REQUEST *)data;
 548
 549         request_free(&request);
 550 }
 551
 552
 553 /*
 554  *      Process the pseudo-EAP contents of the tunneled data.
 555  */
 556 int eappeap_process(EAP_HANDLER *handler, tls_session_t *tls_session)
 557 {
 558         int err;
 559         peap_tunnel_t *t = tls_session->opaque;
 560         REQUEST *fake;
 561         VALUE_PAIR *vp;
 562         int rcode = RLM_MODULE_REJECT;
 563         const uint8_t   *data;
 564         unsigned int data_len;
 565 #ifndef NDEBUG
 566         size_t i;
 567 #endif
 568
 569         REQUEST *request = handler->request;
 570         EAP_DS *eap_ds = handler->eap_ds;
 571
 572         /*
 573          *      FIXME: if the SSL session says "want read", or
 574          *      similar, leave the data in the clean_out buffer.  This
 575          *      lets the application data be sent across multiple
 576          *      fragments.
 577          */
 578         err = tls_handshake_recv(tls_session);
 579         if (!err) {
 580                 DEBUG2(" rlm_eap_peap: Failed in SSL");
 581                 return RLM_MODULE_REJECT;
 582         }
 583
 584         /*
 585          *      Just look at the buffer directly, without doing
 586          *      record_minus.  This lets us avoid another data copy.
 587          */
 588         data_len = tls_session->clean_out.used;
 589         tls_session->clean_out.used = 0;
 590         data = tls_session->clean_out.data;
 591
 592 #ifndef NDEBUG
 593         if ((debug_flag > 2) && fr_log_fp) {
 594                 for (i = 0; i < data_len; i++) {
 595                         if ((i & 0x0f) == 0) fprintf(fr_log_fp, "  PEAP tunnel data in %04x: ", i);
 596
 597                         fprintf(fr_log_fp, "%02x ", data[i]);
 598
 599                         if ((i & 0x0f) == 0x0f) fprintf(fr_log_fp, "\n");
 600                 }
 601                 if ((data_len & 0x0f) != 0) fprintf(fr_log_fp, "\n");
 602         }
 603 #endif
 604
 605         if (!eapmessage_verify(data, data_len)) {
 606                 DEBUG2("  rlm_eap_peap: Tunneled data is invalid.");
 607                 return RLM_MODULE_REJECT;
 608         }
 609
 610
 611         /*
 612          *      If we authenticated the user, then it's OK.
 613          */
 614         if (t->status == PEAP_STATUS_SENT_TLV_SUCCESS) {
 615                 if (eappeap_check_tlv(data)) {
 616                         DEBUG2("  rlm_eap_peap: Success");
 617                         return RLM_MODULE_OK;
 618                 }
 619
 620                 return RLM_MODULE_REJECT;
 621
 622         } else if (t->status == PEAP_STATUS_SENT_TLV_FAILURE) {
 623                 DEBUG2("  rlm_eap_peap:  Had sent TLV failure.  User was rejected earlier in this session.");
 624                 return RLM_MODULE_REJECT;
 625         }
 626
 627         fake = request_alloc_fake(request);
 628
 629         rad_assert(fake->packet->vps == NULL);
 630
 631         fake->packet->vps = eap2vp(eap_ds, data, data_len);
 632         if (!fake->packet->vps) {
 633                 request_free(&fake);
 634                 DEBUG2("  rlm_eap_peap: Unable to convert tunneled EAP packet to internal server data structures");
 635                 return PW_AUTHENTICATION_REJECT;
 636         }
 637
 638 #ifndef NDEBUG
 639         if ((debug_flag > 0) && fr_log_fp) {
 640                 fprintf(fr_log_fp, "  PEAP: Got tunneled EAP-Message\n");
 641
 642                 debug_pair_list(fake->packet->vps);
 643         }
 644 #endif
 645
 646         /*
 647          *      Tell the request that it's a fake one.
 648          */
 649         vp = pairmake("Freeradius-Proxied-To", "127.0.0.1", T_OP_EQ);
 650         if (vp) {
 651                 pairadd(&fake->packet->vps, vp);
 652         }
 653
 654         /*
 655          *      Update other items in the REQUEST data structure.
 656          */
 657         if (!t->username) {
 658                 /*
 659                  *      There's no User-Name in the tunneled session,
 660                  *      so we add one here, by pulling it out of the
 661                  *      EAP-Identity packet.
 662                  */
 663                 if ((data[0] == PW_EAP_IDENTITY) && (data_len > 1)) {
 664                         t->username = pairmake("User-Name", "", T_OP_EQ);
 665                         rad_assert(t->username != NULL);
 666
 667                         memcpy(t->username->vp_strvalue, data + 1, data_len - 1);
 668                         t->username->length = data_len - 1;
 669                         t->username->vp_strvalue[t->username->length] = 0;
 670                         DEBUG2("  PEAP: Got tunneled identity of %s", t->username->vp_strvalue);
 671
 672                         /*
 673                          *      If there's a default EAP type,
 674                          *      set it here.
 675                          */
 676                         if (t->default_eap_type != 0) {
 677                                 DEBUG2("  PEAP: Setting default EAP type for tunneled EAP session.");
 678                                 vp = pairmake("EAP-Type", "0", T_OP_EQ);
 679                                 vp->vp_integer = t->default_eap_type;
 680                                 pairadd(&fake->config_items, vp);
 681                         }
 682                 }
 683         } /* else there WAS a t->username */
 684
 685         if (t->username) {
 686                 vp = paircopy(t->username);
 687                 pairadd(&fake->packet->vps, vp);
 688                 fake->username = pairfind(fake->packet->vps, PW_USER_NAME);
 689                 DEBUG2("  PEAP: Setting User-Name to %s",
 690                        fake->username->vp_strvalue);
 691         }
 692
 693         /*
 694          *      Add the State attribute, too, if it exists.
 695          */
 696         if (t->state) {
 697                 vp = paircopy(t->state);
 698                 if (vp) pairadd(&fake->packet->vps, vp);
 699         }
 700
 701         /*
 702          *      If this is set, we copy SOME of the request attributes
 703          *      from outside of the tunnel to inside of the tunnel.
 704          *
 705          *      We copy ONLY those attributes which do NOT already
 706          *      exist in the tunneled request.
 707          *
 708          *      This code is copied from ../rlm_eap_ttls/ttls.c
 709          */
 710         if (t->copy_request_to_tunnel) {
 711                 VALUE_PAIR *copy;
 712
 713                 for (vp = request->packet->vps; vp != NULL; vp = vp->next) {
 714                         /*
 715                          *      The attribute is a server-side thingy,
 716                          *      don't copy it.
 717                          */
 718                         if ((vp->attribute > 255) &&
 719                             (((vp->attribute >> 16) & 0xffff) == 0)) {
 720                                 continue;
 721                         }
 722
 723                         /*
 724                          *      The outside attribute is already in the
 725                          *      tunnel, don't copy it.
 726                          *
 727                          *      This works for BOTH attributes which
 728                          *      are originally in the tunneled request,
 729                          *      AND attributes which are copied there
 730                          *      from below.
 731                          */
 732                         if (pairfind(fake->packet->vps, vp->attribute)) {
 733                                 continue;
 734                         }
 735
 736                         /*
 737                          *      Some attributes are handled specially.
 738                          */
 739                         switch (vp->attribute) {
 740                                 /*
 741                                  *      NEVER copy Message-Authenticator,
 742                                  *      EAP-Message, or State.  They're
 743                                  *      only for outside of the tunnel.
 744                                  */
 745                         case PW_USER_NAME:
 746                         case PW_USER_PASSWORD:
 747                         case PW_CHAP_PASSWORD:
 748                         case PW_CHAP_CHALLENGE:
 749                         case PW_PROXY_STATE:
 750                         case PW_MESSAGE_AUTHENTICATOR:
 751                         case PW_EAP_MESSAGE:
 752                         case PW_STATE:
 753                                 continue;
 754                                 break;
 755
 756                                 /*
 757                                  *      By default, copy it over.
 758                                  */
 759                         default:
 760                                 break;
 761                         }
 762
 763                         /*
 764                          *      Don't copy from the head, we've already
 765                          *      checked it.
 766                          */
 767                         copy = paircopy2(vp, vp->attribute);
 768                         pairadd(&fake->packet->vps, copy);
 769                 }
 770         }
 771
 772         if ((vp = pairfind(request->config_items, PW_VIRTUAL_SERVER)) != NULL) {
 773                 fake->server = vp->vp_strvalue;
 774
 775         } else if (t->virtual_server) {
 776                 fake->server = t->virtual_server;
 777
 778         } /* else fake->server == request->server */
 779
 780 #ifndef NDEBUG
 781         if ((debug_flag > 0) && fr_log_fp) {
 782                 fprintf(fr_log_fp, "  PEAP: Sending tunneled request\n");
 783
 784                 debug_pair_list(fake->packet->vps);
 785
 786                 fprintf(fr_log_fp, "server %s {\n", fake->server);
 787         }
 788 #endif
 789
 790         /*
 791          *      Call authentication recursively, which will
 792          *      do PAP, CHAP, MS-CHAP, etc.
 793          */
 794         rad_authenticate(fake);
 795
 796         /*
 797          *      Note that we don't do *anything* with the reply
 798          *      attributes.
 799          */
 800 #ifndef NDEBUG
 801         if ((debug_flag > 0) && fr_log_fp) {
 802                 fprintf(fr_log_fp, "} # server %s\n", fake->server);
 803
 804                 fprintf(fr_log_fp, "  PEAP: Got tunneled reply RADIUS code %d\n",
 805                         fake->reply->code);
 806
 807                 debug_pair_list(fake->reply->vps);
 808         }
 809 #endif
 810
 811         /*
 812          *      Decide what to do with the reply.
 813          */
 814         switch (fake->reply->code) {
 815         case 0:                 /* No reply code, must be proxied... */
 816                 vp = pairfind(fake->config_items, PW_PROXY_TO_REALM);
 817
 818                 if (vp) {
 819                         eap_tunnel_data_t *tunnel;
 820
 821                         /*
 822                          *      The tunneled request was NOT handled,
 823                          *      it has to be proxied.  This means that
 824                          *      the "authenticate" stage was never
 825                          *      performed.
 826                          *
 827                          *      If we are told to NOT proxy the
 828                          *      tunneled request as EAP, then this
 829                          *      means that we've got to decode it,
 830                          *      which means that we MUST run the
 831                          *      "authenticate" portion by hand, here.
 832                          *
 833                          *      Once the tunneled EAP session is ALMOST
 834                          *      done, THEN we proxy it...
 835                          */
 836                         if (!t->proxy_tunneled_request_as_eap) {
 837                                 fake->options |= RAD_REQUEST_OPTION_PROXY_EAP;
 838
 839                                 /*
 840                                  *      Hmm... should we check for
 841                                  *      Auth-Type & EAP-Message here?
 842                                  */
 843
 844
 845                                 /*
 846                                  *      Run the EAP authentication.
 847                                  */
 848                                 DEBUG2("  PEAP: Calling authenticate in order to initiate tunneled EAP session.");
 849                                 rcode = module_authenticate(PW_AUTHTYPE_EAP, fake);
 850                                 if (rcode == RLM_MODULE_OK) {
 851                                         /*
 852                                          *      Authentication succeeded! Rah!
 853                                          */
 854                                         fake->reply->code = PW_AUTHENTICATION_ACK;
 855                                         goto do_process;
 856                                 }
 857
 858                                 if (rcode != RLM_MODULE_HANDLED) {
 859                                         DEBUG2("  PEAP: Can't handle the return code %d", rcode);
 860                                         rcode = RLM_MODULE_REJECT;
 861                                         goto done;
 862                                 }
 863
 864                                 /*
 865                                  *      The module decided it wasn't
 866                                  *      done.  Handle it like normal.
 867                                  */
 868                                 if ((fake->options & RAD_REQUEST_OPTION_PROXY_EAP) == 0) {
 869                                         DEBUG2("    PEAP: Cancelling proxy to realm %s until the tunneled EAP session has been established", vp->vp_strvalue);
 870                                         goto do_process;
 871                                 }
 872
 873                                 /*
 874                                  *      The module has decoded the
 875                                  *      EAP-Message into another set
 876                                  *      of attributes.
 877                                  */
 878                                 pairdelete(&fake->packet->vps,
 879                                            PW_EAP_MESSAGE);
 880                         }
 881
 882                         DEBUG2("  PEAP: Tunneled authentication will be proxied to %s", vp->vp_strvalue);
 883
 884                         /*
 885                          *      Tell the original request that it's going
 886                          *      to be proxied.
 887                          */
 888                         pairmove2(&(request->config_items),
 889                                   &(fake->config_items),
 890                                   PW_PROXY_TO_REALM);
 891
 892                         /*
 893                          *      Seed the proxy packet with the
 894                          *      tunneled request.
 895                          */
 896                         rad_assert(request->proxy == NULL);
 897                         request->proxy = fake->packet;
 898                         fake->packet = NULL;
 899                         rad_free(&fake->reply);
 900                         fake->reply = NULL;
 901
 902                         /*
 903                          *      Set up the callbacks for the tunnel
 904                          */
 905                         tunnel = rad_malloc(sizeof(*tunnel));
 906                         memset(tunnel, 0, sizeof(*tunnel));
 907
 908                         tunnel->tls_session = tls_session;
 909                         tunnel->callback = eappeap_postproxy;
 910
 911                         /*
 912                          *      Associate the callback with the request.
 913                          */
 914                         rcode = request_data_add(request,
 915                                                  request->proxy,
 916                                                  REQUEST_DATA_EAP_TUNNEL_CALLBACK,
 917                                                  tunnel, free);
 918                         rad_assert(rcode == 0);
 919
 920                         /*
 921                          *      We're not proxying it as EAP, so we've got
 922                          *      to do the callback later.
 923                          */
 924                         if ((fake->options & RAD_REQUEST_OPTION_PROXY_EAP) != 0) {
 925                                 DEBUG2("  PEAP: Remembering to do EAP-MS-CHAP-V2 post-proxy.");
 926
 927                                 /*
 928                                  *      rlm_eap.c has taken care of associating
 929                                  *      the handler with the fake request.
 930                                  *
 931                                  *      So we associate the fake request with
 932                                  *      this request.
 933                                  */
 934                                 rcode = request_data_add(request,
 935                                                          request->proxy,
 936                                                          REQUEST_DATA_EAP_MSCHAP_TUNNEL_CALLBACK,
 937                                                          fake, my_request_free);
 938                                 rad_assert(rcode == 0);
 939
 940                                 /*
 941                                  *      Do NOT free the fake request!
 942                                  */
 943                                 return RLM_MODULE_UPDATED;
 944                         }
 945
 946                         /*
 947                          *      Didn't authenticate the packet, but
 948                          *      we're proxying it.
 949                          */
 950                         rcode = RLM_MODULE_UPDATED;
 951
 952                 } else {
 953                         DEBUG2("  PEAP: Unknown RADIUS packet type %d: rejecting tunneled user", fake->reply->code);
 954                         rcode = RLM_MODULE_REJECT;
 955                 }
 956                 break;
 957
 958         default:
 959         do_process:
 960                 rcode = process_reply(handler, tls_session, request,
 961                                       fake->reply);
 962                 break;
 963         }
 964
 965  done:
 966         request_free(&fake);
 967
 968         return rcode;
 969 }