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 RCSID("$Id$")
  25 USES_APPLE_DEPRECATED_API       /* OpenSSL API has been deprecated by Apple */
  26
  27 #include "eap_peap.h"
  28
  29 static int setup_fake_request(REQUEST *request, REQUEST *fake, peap_tunnel_t *t);
  30
  31 /*
  32  *      Send protected EAP-Failure
  33  *
  34  *       Result-TLV = Failure
  35  */
  36 static int eappeap_failure(eap_handler_t *handler, tls_session_t *tls_session)
  37 {
  38         uint8_t tlv_packet[11];
  39         REQUEST *request = handler->request;
  40
  41         RDEBUG2("FAILURE");
  42
  43         tlv_packet[0] = PW_EAP_REQUEST;
  44         tlv_packet[1] = handler->eap_ds->response->id +1;
  45         tlv_packet[2] = 0;
  46         tlv_packet[3] = 11;     /* length of this packet */
  47         tlv_packet[4] = PW_EAP_TLV;
  48         tlv_packet[5] = 0x80;
  49         tlv_packet[6] = EAP_TLV_ACK_RESULT;
  50         tlv_packet[7] = 0;
  51         tlv_packet[8] = 2;      /* length of the data portion */
  52         tlv_packet[9] = 0;
  53         tlv_packet[10] = EAP_TLV_FAILURE;
  54
  55         (tls_session->record_plus)(&tls_session->clean_in, tlv_packet, 11);
  56
  57         /*
  58          *      FIXME: Check the return code.
  59          */
  60         tls_handshake_send(request, tls_session);
  61
  62         return 1;
  63 }
  64
  65
  66 /*
  67  *      Send protected EAP-Success
  68  *
  69  *       Result-TLV = Success
  70  */
  71 static int eappeap_success(eap_handler_t *handler, tls_session_t *tls_session)
  72 {
  73         uint8_t tlv_packet[11];
  74         REQUEST *request = handler->request;
  75
  76         RDEBUG2("SUCCESS");
  77
  78         tlv_packet[0] = PW_EAP_REQUEST;
  79         tlv_packet[1] = handler->eap_ds->response->id +1;
  80         tlv_packet[2] = 0;
  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;
  85         tlv_packet[7] = 0;
  86         tlv_packet[8] = 2;      /* length of the data portion */
  87         tlv_packet[9] = 0;
  88         tlv_packet[10] = EAP_TLV_SUCCESS;
  89
  90         (tls_session->record_plus)(&tls_session->clean_in, tlv_packet, 11);
  91
  92         /*
  93          *      FIXME: Check the return code.
  94          */
  95         tls_handshake_send(request, tls_session);
  96
  97         return 1;
  98 }
  99
 100
 101 static int eappeap_identity(eap_handler_t *handler, tls_session_t *tls_session)
 102 {
 103         eap_packet_raw_t eap_packet;
 104
 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;
 110
 111         (tls_session->record_plus)(&tls_session->clean_in,
 112                                   &eap_packet, sizeof(eap_packet));
 113
 114         tls_handshake_send(handler->request, tls_session);
 115         (tls_session->record_init)(&tls_session->clean_in);
 116
 117         return 1;
 118 }
 119
 120 /*
 121  * Send an MS SoH request
 122  */
 123 static int eappeap_soh(eap_handler_t *handler, tls_session_t *tls_session)
 124 {
 125         uint8_t tlv_packet[20];
 126
 127         tlv_packet[0] = 254;    /* extended type */
 128
 129         tlv_packet[1] = 0;
 130         tlv_packet[2] = 0x01;   /* ms vendor */
 131         tlv_packet[3] = 0x37;
 132
 133         tlv_packet[4] = 0;      /* ms soh eap */
 134         tlv_packet[5] = 0;
 135         tlv_packet[6] = 0;
 136         tlv_packet[7] = 0x21;
 137
 138         tlv_packet[8] = 0;      /* vendor-spec tlv */
 139         tlv_packet[9] = 7;
 140
 141         tlv_packet[10] = 0;
 142         tlv_packet[11] = 8;     /* payload len */
 143
 144         tlv_packet[12] = 0;     /* ms vendor */
 145         tlv_packet[13] = 0;
 146         tlv_packet[14] = 0x01;
 147         tlv_packet[15] = 0x37;
 148
 149         tlv_packet[16] = 0;
 150         tlv_packet[17] = 2;
 151         tlv_packet[18] = 0;
 152         tlv_packet[19] = 0;
 153
 154         (tls_session->record_plus)(&tls_session->clean_in, tlv_packet, 20);
 155         tls_handshake_send(handler->request, tls_session);
 156         return 1;
 157 }
 158
 159 static void eapsoh_verify(REQUEST *request, RADIUS_PACKET *packet,
 160                           uint8_t const *data, unsigned int data_len) {
 161
 162         VALUE_PAIR *vp;
 163         uint8_t eap_method_base;
 164         uint32_t eap_vendor;
 165         uint32_t eap_method;
 166         int rv;
 167
 168         vp = fr_pair_make(packet, &packet->vps, "SoH-Supported", "no", T_OP_EQ);
 169         if (data && data[0] == PW_EAP_NAK) {
 170                 RDEBUG("SoH - client NAKed");
 171                 return;
 172         }
 173
 174         if (!data || data_len < 8) {
 175                 RDEBUG("SoH - eap payload too short");
 176                 return;
 177         }
 178
 179         eap_method_base = *data++;
 180         if (eap_method_base != 254) {
 181                 RDEBUG("SoH - response is not extended EAP: %i", eap_method_base);
 182                 return;
 183         }
 184
 185         eap_vendor = soh_pull_be_24(data); data += 3;
 186         if (eap_vendor != 0x137) {
 187                 RDEBUG("SoH - extended eap vendor %08x is not Microsoft", eap_vendor);
 188                 return;
 189         }
 190
 191         eap_method = soh_pull_be_32(data); data += 4;
 192         if (eap_method != 0x21) {
 193                 RDEBUG("SoH - response eap type %08x is not EAP-SoH", eap_method);
 194                 return;
 195         }
 196
 197
 198         rv = soh_verify(request, data, data_len - 8);
 199         if (rv<0) {
 200                 RDEBUG("SoH - error decoding payload: %s", fr_strerror());
 201         } else {
 202                 vp->vp_integer = 1;
 203         }
 204 }
 205
 206 /*
 207  *      Verify the tunneled EAP message.
 208  */
 209 static int eapmessage_verify(REQUEST *request,
 210                              uint8_t const *data, unsigned int data_len, int peap_version)
 211 {
 212         eap_packet_raw_t const *eap_packet = (eap_packet_raw_t const *) data;
 213         eap_type_t eap_method;
 214
 215         /*
 216          *      Hack for now.
 217          */
 218         if (peap_version == 1) return 1;
 219
 220         /*
 221          *      No data, OR only 1 byte of EAP type.
 222          */
 223         if (!data || (data_len == 0) ||
 224             ((data_len <= 1) && (data[0] != PW_EAP_IDENTITY))) {
 225                 return 0;
 226         }
 227
 228         eap_method = *data;
 229         switch (eap_method) {
 230         case PW_EAP_IDENTITY:
 231                 if (data_len == 1) {
 232                         RDEBUG2("Identity - ");
 233                         return 1;
 234                 }
 235                 RDEBUG2("Identity - %*s",
 236                        data_len - 1, data + 1);
 237                 return 1;
 238
 239                 /*
 240                  *      If the first byte of the packet is
 241                  *      EAP-Response, and the EAP data is a TLV,
 242                  *      then it looks OK...
 243                  */
 244         case PW_EAP_RESPONSE:
 245                 if (eap_packet->data[0] == PW_EAP_TLV) {
 246                         RDEBUG2("Received EAP-TLV response");
 247                         return 1;
 248                 }
 249                 RDEBUG2("Received unexpected EAP-Response, rejecting the session.");
 250                 break;
 251
 252
 253                 /*
 254                  *      We normally do Microsoft MS-CHAPv2 (26), versus
 255                  *      Cisco MS-CHAPv2 (29).
 256                  */
 257         case PW_EAP_MSCHAPV2:
 258         default:
 259                 RDEBUG2("EAP method %s (%d)", eap_type2name(eap_method),
 260                         eap_method);
 261                 return 1;
 262         }
 263
 264         return 0;
 265 }
 266
 267 /*
 268  *      Convert a pseudo-EAP packet to a list of VALUE_PAIR's.
 269  */
 270 static VALUE_PAIR *eap2vp(UNUSED REQUEST *request, RADIUS_PACKET *packet,
 271                           EAP_DS *eap_ds,
 272                           uint8_t const *data, size_t data_len, int peap_version)
 273 {
 274         size_t total;
 275         uint8_t *p;
 276         VALUE_PAIR *vp = NULL, *head = NULL;
 277         vp_cursor_t cursor;
 278
 279         if (data_len > 65535) return NULL; /* paranoia */
 280
 281         vp = fr_pair_afrom_num(packet, PW_EAP_MESSAGE, 0);
 282         if (!vp) {
 283                 return NULL;
 284         }
 285
 286         total = data_len;
 287         if (total > 249) total = 249;
 288
 289         if (peap_version == 0) {
 290                 /*
 291                  *      Hand-build an EAP packet from the crap in PEAP version 0.
 292                  */
 293                 vp->vp_length = EAP_HEADER_LEN + total;
 294                 vp->vp_octets = p = talloc_array(vp, uint8_t, vp->vp_length);
 295
 296                 p[0] = PW_EAP_RESPONSE;
 297                 p[1] = eap_ds->response->id;
 298                 p[2] = (data_len + EAP_HEADER_LEN) >> 8;
 299                 p[3] = (data_len + EAP_HEADER_LEN) & 0xff;
 300
 301                 memcpy(p + EAP_HEADER_LEN, data, total);
 302
 303         } else {                /* peapv1 */
 304                 vp->vp_length = total;
 305                 vp->vp_octets = p = talloc_array(vp, uint8_t, vp->vp_length);
 306                 memcpy(p, data, total);
 307         }
 308
 309         fr_cursor_init(&cursor, &head);
 310         fr_cursor_insert(&cursor, vp);
 311         while (total < data_len) {
 312                 vp = fr_pair_afrom_num(packet, PW_EAP_MESSAGE, 0);
 313                 if (!vp) {
 314                         fr_pair_list_free(&head);
 315                         return NULL;
 316                 }
 317
 318                 fr_pair_value_memcpy(vp, data + total, (data_len - total));
 319
 320                 total += vp->vp_length;
 321
 322                 fr_cursor_insert(&cursor, vp);
 323         }
 324
 325         return head;
 326 }
 327
 328
 329 /*
 330  *      Convert a list of VALUE_PAIR's to an EAP packet, through the
 331  *      simple expedient of dumping the EAP message
 332  */
 333 static int vp2eap(REQUEST *request, tls_session_t *tls_session, VALUE_PAIR *vp)
 334 {
 335         rad_assert(vp != NULL);
 336         VALUE_PAIR *this;
 337         vp_cursor_t cursor;
 338         size_t header = EAP_HEADER_LEN;
 339
 340         if (tls_session->peap_flag > 0) header = 0;
 341
 342         /*
 343          *      Skip the id, code, and length.  Just write the EAP
 344          *      type & data to the client.
 345          */
 346 #ifndef NDEBUG
 347         if ((rad_debug_lvl > 2) && fr_log_fp) {
 348                 size_t i, total, start = header;
 349                 total = 0;
 350
 351                 for (this = fr_cursor_init(&cursor, &vp); this; this = fr_cursor_next(&cursor)) {
 352                         for (i = start; i < vp->vp_length; i++) {
 353                                 if ((total & 0x0f) == 0) {
 354                                         fprintf(fr_log_fp, "  PEAP tunnel data out %04x: ", (int) total);
 355                                 }
 356                                 fprintf(fr_log_fp, "%02x ", vp->vp_octets[i]);
 357
 358                                 if ((total & 0x0f) == 0x0f) {
 359                                         fprintf(fr_log_fp, "\n");
 360                                 }
 361
 362                                 total++;
 363                         }
 364
 365                         start = 0;
 366                 }
 367
 368                 if ((total & 0x0f) != 0) {
 369                         fprintf(fr_log_fp, "\n");
 370                 }
 371         }
 372 #endif
 373
 374         /*
 375          *      Send the EAP data in the first attribute, WITHOUT the
 376          *      header.
 377          */
 378         (tls_session->record_plus)(&tls_session->clean_in, vp->vp_octets + header, vp->vp_length - header);
 379
 380         /*
 381          *      Send the rest of the EAP data, but skipping the first VP.
 382          */
 383         fr_cursor_init(&cursor, &vp);
 384         for (this = fr_cursor_next(&cursor);
 385              this;
 386              this = fr_cursor_next(&cursor)) {
 387                 (tls_session->record_plus)(&tls_session->clean_in, this->vp_octets, this->vp_length);
 388         }
 389
 390         tls_handshake_send(request, tls_session);
 391
 392         return 1;
 393 }
 394
 395
 396 /*
 397  *      See if there's a TLV in the response.
 398  */
 399 static int eappeap_check_tlv(REQUEST *request, uint8_t const *data,
 400                              size_t data_len)
 401 {
 402         eap_packet_raw_t const *eap_packet = (eap_packet_raw_t const *) data;
 403
 404         if (data_len < 11) return 0;
 405
 406         /*
 407          *      Look for success or failure.
 408          */
 409         if ((eap_packet->code == PW_EAP_RESPONSE) &&
 410             (eap_packet->data[0] == PW_EAP_TLV)) {
 411                 if (data[10] == EAP_TLV_SUCCESS) {
 412                         return 1;
 413                 }
 414
 415                 if (data[10] == EAP_TLV_FAILURE) {
 416                         RDEBUG2("Client rejected our response.  The password is probably incorrect");
 417                         return 0;
 418                 }
 419         }
 420
 421         RDEBUG("Unknown TLV %02x", data[10]);
 422
 423         return 0;
 424 }
 425
 426
 427 /*
 428  *      Use a reply packet to determine what to do.
 429  */
 430 static rlm_rcode_t CC_HINT(nonnull) process_reply(eap_handler_t *handler, tls_session_t *tls_session,
 431                                           REQUEST *request, RADIUS_PACKET *reply)
 432 {
 433         rlm_rcode_t rcode = RLM_MODULE_REJECT;
 434         VALUE_PAIR *vp;
 435         peap_tunnel_t *t = tls_session->opaque;
 436
 437         if ((rad_debug_lvl > 0) && fr_log_fp) {
 438                 RDEBUG("Got tunneled reply RADIUS code %d", reply->code);
 439                 rdebug_pair_list(L_DBG_LVL_1, request, reply->vps, NULL);
 440         }
 441
 442         switch (reply->code) {
 443         case PW_CODE_ACCESS_ACCEPT:
 444                 RDEBUG2("Tunneled authentication was successful");
 445                 t->status = PEAP_STATUS_SENT_TLV_SUCCESS;
 446                 eappeap_success(handler, tls_session);
 447                 rcode = RLM_MODULE_HANDLED;
 448
 449                 /*
 450                  *      If we've been told to use the attributes from
 451                  *      the reply, then do so.
 452                  *
 453                  *      WARNING: This may leak information about the
 454                  *      tunneled user!
 455                  */
 456                 if (t->use_tunneled_reply) {
 457                         RDEBUG2("Saving tunneled attributes for later");
 458
 459                         /*
 460                          *      Clean up the tunneled reply.
 461                          */
 462                         fr_pair_delete_by_num(&reply->vps, PW_PROXY_STATE, 0, TAG_ANY);
 463                         fr_pair_delete_by_num(&reply->vps, PW_EAP_MESSAGE, 0, TAG_ANY);
 464                         fr_pair_delete_by_num(&reply->vps, PW_MESSAGE_AUTHENTICATOR, 0, TAG_ANY);
 465
 466                         /*
 467                          *      Delete MPPE keys & encryption policy.  We don't
 468                          *      want these here.
 469                          */
 470                         fr_pair_delete_by_num(&reply->vps, 7, VENDORPEC_MICROSOFT, TAG_ANY);
 471                         fr_pair_delete_by_num(&reply->vps, 8, VENDORPEC_MICROSOFT, TAG_ANY);
 472                         fr_pair_delete_by_num(&reply->vps, 16, VENDORPEC_MICROSOFT, TAG_ANY);
 473                         fr_pair_delete_by_num(&reply->vps, 17, VENDORPEC_MICROSOFT, TAG_ANY);
 474
 475                         fr_pair_list_free(&t->accept_vps); /* for proxying MS-CHAP2 */
 476                         fr_pair_list_mcopy_by_num(t, &t->accept_vps, &reply->vps, 0, 0, TAG_ANY);
 477                         rad_assert(!reply->vps);
 478                 }
 479                 break;
 480
 481         case PW_CODE_ACCESS_REJECT:
 482                 RDEBUG2("Tunneled authentication was rejected");
 483                 t->status = PEAP_STATUS_SENT_TLV_FAILURE;
 484                 eappeap_failure(handler, tls_session);
 485                 rcode = RLM_MODULE_HANDLED;
 486                 break;
 487
 488         case PW_CODE_ACCESS_CHALLENGE:
 489                 RDEBUG2("Got tunneled Access-Challenge");
 490
 491                 /*
 492                  *      Keep the State attribute, if necessary.
 493                  *
 494                  *      Get rid of the old State, too.
 495                  */
 496                 fr_pair_list_free(&t->state);
 497                 fr_pair_list_mcopy_by_num(t, &t->state, &reply->vps, PW_STATE, 0, TAG_ANY);
 498
 499                 /*
 500                  *      PEAP takes only EAP-Message attributes inside
 501                  *      of the tunnel.  Any Reply-Message in the
 502                  *      Access-Challenge is ignored.
 503                  */
 504                 vp = NULL;
 505                 fr_pair_list_mcopy_by_num(t, &vp, &reply->vps, PW_EAP_MESSAGE, 0, TAG_ANY);
 506
 507                 /*
 508                  *      Handle EAP-MSCHAP-V2, where Access-Accept's
 509                  *      from the home server may contain MS-CHAP2-Success,
 510                  *      which the module turns into challenges, so that
 511                  *      the client may respond to the challenge with
 512                  *      an "ack" packet.
 513                  */
 514                 if (t->home_access_accept && t->use_tunneled_reply) {
 515                         RDEBUG2("Saving tunneled attributes for later");
 516
 517                         /*
 518                          *      Clean up the tunneled reply.
 519                          */
 520                         fr_pair_delete_by_num(&reply->vps, PW_PROXY_STATE, 0, TAG_ANY);
 521                         fr_pair_delete_by_num(&reply->vps, PW_MESSAGE_AUTHENTICATOR, 0, TAG_ANY);
 522
 523                         rad_assert(!t->accept_vps);
 524                         fr_pair_list_mcopy_by_num(t, &t->accept_vps, &reply->vps, 0, 0, TAG_ANY);
 525                         rad_assert(!reply->vps);
 526                 }
 527
 528                 /*
 529                  *      Handle the ACK, by tunneling any necessary reply
 530                  *      VP's back to the client.
 531                  */
 532                 if (vp) {
 533                         vp2eap(request, tls_session, vp);
 534                         fr_pair_list_free(&vp);
 535                 }
 536
 537                 rcode = RLM_MODULE_HANDLED;
 538                 break;
 539
 540         default:
 541                 RDEBUG2("Unknown RADIUS packet type %d: rejecting tunneled user", reply->code);
 542                 rcode = RLM_MODULE_REJECT;
 543                 break;
 544         }
 545
 546         return rcode;
 547 }
 548
 549 #ifdef WITH_PROXY
 550 /*
 551  *      Do post-proxy processing,
 552  */
 553 static int CC_HINT(nonnull) eappeap_postproxy(eap_handler_t *handler, void *data)
 554 {
 555         int rcode;
 556         tls_session_t *tls_session = (tls_session_t *) data;
 557         REQUEST *fake, *request = handler->request;
 558
 559         RDEBUG2("Passing reply from proxy back into the tunnel");
 560
 561         /*
 562          *      If there was a fake request associated with the proxied
 563          *      request, do more processing of it.
 564          */
 565         fake = (REQUEST *) request_data_get(handler->request,
 566                                             handler->request->proxy,
 567                                             REQUEST_DATA_EAP_MSCHAP_TUNNEL_CALLBACK);
 568
 569         /*
 570          *      Do the callback, if it exists, and if it was a success.
 571          */
 572         if (fake && (handler->request->proxy_reply->code == PW_CODE_ACCESS_ACCEPT)) {
 573                 peap_tunnel_t *t = tls_session->opaque;
 574
 575                 t->home_access_accept = true;
 576
 577                 /*
 578                  *      Terrible hacks.
 579                  */
 580                 rad_assert(!fake->packet);
 581                 fake->packet = talloc_steal(fake, request->proxy);
 582                 fake->packet->src_ipaddr = request->packet->src_ipaddr;
 583                 request->proxy = NULL;
 584
 585                 rad_assert(!fake->reply);
 586                 fake->reply = talloc_steal(fake, request->proxy_reply);
 587                 request->proxy_reply = NULL;
 588
 589                 if ((rad_debug_lvl > 0) && fr_log_fp) {
 590                         fprintf(fr_log_fp, "server %s {\n", fake->server);
 591                 }
 592
 593                 /*
 594                  *      Perform a post-auth stage, which will get the EAP
 595                  *      handler, too...
 596                  */
 597                 fake->options &= ~RAD_REQUEST_OPTION_PROXY_EAP;
 598                 RDEBUG2("Passing reply back for EAP-MS-CHAP-V2");
 599                 process_post_proxy(0, fake);
 600
 601                 /*
 602                  *      FIXME: If rcode returns fail, do something
 603                  *      intelligent...
 604                  */
 605                 rcode = rad_postauth(fake);
 606
 607                 if ((rad_debug_lvl > 0) && fr_log_fp) {
 608                         fprintf(fr_log_fp, "} # server %s\n", fake->server);
 609
 610                         RDEBUG("Final reply from tunneled session code %d", fake->reply->code);
 611                         rdebug_pair_list(L_DBG_LVL_1, request, fake->reply->vps, NULL);
 612                 }
 613
 614                 /*
 615                  *      Terrible hacks.
 616                  */
 617                 request->proxy = talloc_steal(request, fake->packet);
 618                 fake->packet = NULL;
 619                 request->proxy_reply = talloc_steal(request, fake->reply);
 620                 fake->reply = NULL;
 621
 622                 /*
 623                  *      And we're done with this request.
 624                  */
 625
 626                 switch (rcode) {
 627                 case RLM_MODULE_FAIL:
 628                         talloc_free(fake);
 629                         eaptls_fail(handler, 0);
 630                         return 0;
 631
 632                 default:  /* Don't Do Anything */
 633                         RDEBUG2("Got reply %d", request->proxy_reply->code);
 634                         break;
 635                 }
 636         }
 637         talloc_free(fake);      /* robust if !fake */
 638
 639         /*
 640          *      If there was no EAP-Message in the reply packet, then
 641          *      we know that we're supposed to re-run the "authenticate"
 642          *      stage, in order to get the right kind of handling...
 643          */
 644
 645         /*
 646          *      Process the reply from the home server.
 647          */
 648
 649         rcode = process_reply(handler, tls_session, handler->request,
 650                               handler->request->proxy_reply);
 651
 652         /*
 653          *      The proxy code uses the reply from the home server as
 654          *      the basis for the reply to the NAS.  We don't want that,
 655          *      so we toss it, after we've had our way with it.
 656          */
 657         fr_pair_list_free(&handler->request->proxy_reply->vps);
 658
 659         switch (rcode) {
 660         case RLM_MODULE_REJECT:
 661                 RDEBUG2("Reply was rejected");
 662                 eaptls_fail(handler, 0);
 663                 return 0;
 664
 665         case RLM_MODULE_HANDLED:
 666                 RDEBUG2("Reply was handled");
 667                 eaptls_request(handler->eap_ds, tls_session);
 668                 request->proxy_reply->code = PW_CODE_ACCESS_CHALLENGE;
 669                 return 1;
 670
 671         case RLM_MODULE_OK:
 672                 RDEBUG2("Reply was OK");
 673
 674                 /*
 675                  *      Success: Automatically return MPPE keys.
 676                  */
 677                 return eaptls_success(handler, 0);
 678
 679         default:
 680                 RDEBUG2("Reply was unknown");
 681                 break;
 682         }
 683
 684         eaptls_fail(handler, 0);
 685         return 0;
 686 }
 687 #endif
 688
 689
 690 static char const *peap_state(peap_tunnel_t *t)
 691 {
 692         switch (t->status) {
 693         case PEAP_STATUS_TUNNEL_ESTABLISHED:
 694                 return "TUNNEL ESTABLISHED";
 695
 696         case PEAP_STATUS_WAIT_FOR_SOH_RESPONSE:
 697                 return "WAITING FOR SOH RESPONSE";
 698
 699         case PEAP_STATUS_INNER_IDENTITY_REQ_SENT:
 700                 return "WAITING FOR INNER IDENTITY";
 701
 702         case PEAP_STATUS_SENT_TLV_SUCCESS:
 703                 return "send tlv success";
 704
 705         case PEAP_STATUS_SENT_TLV_FAILURE:
 706                 return "send tlv failure";
 707
 708         case PEAP_STATUS_PHASE2_INIT:
 709                 return "phase2_init";
 710
 711         case PEAP_STATUS_PHASE2:
 712                 return "phase2";
 713
 714         default:
 715                 break;
 716         }
 717         return "?";
 718 }
 719
 720 static void print_tunneled_data(uint8_t const *data, size_t data_len)
 721 {
 722         size_t i;
 723
 724         if ((rad_debug_lvl > 2) && fr_log_fp) {
 725                 for (i = 0; i < data_len; i++) {
 726                   if ((i & 0x0f) == 0) fprintf(fr_log_fp, "  PEAP tunnel data in %02x: ", (int) i);
 727
 728                         fprintf(fr_log_fp, "%02x ", data[i]);
 729
 730                         if ((i & 0x0f) == 0x0f) fprintf(fr_log_fp, "\n");
 731                 }
 732                 if ((data_len & 0x0f) != 0) fprintf(fr_log_fp, "\n");
 733         }
 734 }
 735
 736
 737 /*
 738  *      Process the pseudo-EAP contents of the tunneled data.
 739  */
 740 rlm_rcode_t eappeap_process(eap_handler_t *handler, tls_session_t *tls_session, int auth_type_eap)
 741 {
 742         peap_tunnel_t   *t = tls_session->opaque;
 743         REQUEST         *fake;
 744         VALUE_PAIR      *vp;
 745         rlm_rcode_t     rcode = RLM_MODULE_REJECT;
 746         uint8_t const   *data;
 747         unsigned int    data_len;
 748         size_t          header = 0;
 749
 750         REQUEST *request = handler->request;
 751         EAP_DS *eap_ds = handler->eap_ds;
 752
 753         /*
 754          *      Just look at the buffer directly, without doing
 755          *      record_minus.  This lets us avoid another data copy.
 756          */
 757         data_len = tls_session->clean_out.used;
 758         tls_session->clean_out.used = 0;
 759         data = tls_session->clean_out.data;
 760
 761         RDEBUG2("PEAP state %s", peap_state(t));
 762
 763         if ((t->status != PEAP_STATUS_TUNNEL_ESTABLISHED) &&
 764             !eapmessage_verify(request, data, data_len, tls_session->peap_flag)) {
 765                 REDEBUG("Tunneled data is invalid");
 766                 if (rad_debug_lvl > 2) print_tunneled_data(data, data_len);
 767                 return RLM_MODULE_REJECT;
 768         }
 769
 770         if (tls_session->peap_flag > 0) header = EAP_HEADER_LEN;
 771
 772         switch (t->status) {
 773         case PEAP_STATUS_TUNNEL_ESTABLISHED:
 774                 /* FIXME: should be no data in the buffer here, check & assert? */
 775
 776                 if (SSL_session_reused(tls_session->ssl)) {
 777                         RDEBUG2("Skipping Phase2 because of session resumption");
 778                         t->session_resumption_state = PEAP_RESUMPTION_YES;
 779                         if (t->soh) {
 780                                 t->status = PEAP_STATUS_WAIT_FOR_SOH_RESPONSE;
 781                                 RDEBUG2("Requesting SoH from client");
 782                                 eappeap_soh(handler, tls_session);
 783                                 return RLM_MODULE_HANDLED;
 784                         }
 785                         /* we're good, send success TLV */
 786                         t->status = PEAP_STATUS_SENT_TLV_SUCCESS;
 787                         eappeap_success(handler, tls_session);
 788
 789                 } else {
 790                         /* send an identity request */
 791                         t->session_resumption_state = PEAP_RESUMPTION_NO;
 792                         t->status = PEAP_STATUS_INNER_IDENTITY_REQ_SENT;
 793                         eappeap_identity(handler, tls_session);
 794                 }
 795                 return RLM_MODULE_HANDLED;
 796
 797         case PEAP_STATUS_INNER_IDENTITY_REQ_SENT:
 798                 /* we're expecting an identity response */
 799                 if (data[header] != PW_EAP_IDENTITY) {
 800                         REDEBUG("Expected EAP-Identity, got something else");
 801                         return RLM_MODULE_REJECT;
 802                 }
 803
 804                 /*
 805                  *      Save it for later.
 806                  */
 807                 t->username = fr_pair_make(t, NULL, "User-Name", NULL, T_OP_EQ);
 808                 rad_assert(t->username != NULL);
 809
 810                 fr_pair_value_bstrncpy(t->username, data + header + 1, data_len - header - 1);
 811
 812                 RDEBUG("Got inner identity '%s'", t->username->vp_strvalue);
 813                 if (t->soh) {
 814                         t->status = PEAP_STATUS_WAIT_FOR_SOH_RESPONSE;
 815                         RDEBUG2("Requesting SoH from client");
 816                         eappeap_soh(handler, tls_session);
 817                         return RLM_MODULE_HANDLED;
 818                 }
 819                 t->status = PEAP_STATUS_PHASE2_INIT;
 820                 break;
 821
 822         case PEAP_STATUS_WAIT_FOR_SOH_RESPONSE:
 823                 fake = request_alloc_fake(request);
 824                 rad_assert(!fake->packet->vps);
 825                 eapsoh_verify(fake, fake->packet, data + header, data_len - header);
 826                 setup_fake_request(request, fake, t);
 827
 828                 if (t->soh_virtual_server) {
 829                         fake->server = t->soh_virtual_server;
 830                 }
 831                 RDEBUG("Sending SoH request to server %s", fake->server ? fake->server : "NULL");
 832                 rad_virtual_server(fake);
 833
 834                 if (fake->reply->code != PW_CODE_ACCESS_ACCEPT) {
 835                         RDEBUG2("SoH was rejected");
 836                         talloc_free(fake);
 837                         t->status = PEAP_STATUS_SENT_TLV_FAILURE;
 838                         eappeap_failure(handler, tls_session);
 839                         return RLM_MODULE_HANDLED;
 840                 }
 841
 842                 /* save the SoH VPs */
 843                 rad_assert(!t->soh_reply_vps);
 844                 fr_pair_list_mcopy_by_num(t, &t->soh_reply_vps, &fake->reply->vps, 0, 0, TAG_ANY);
 845                 rad_assert(!fake->reply->vps);
 846                 talloc_free(fake);
 847
 848                 if (t->session_resumption_state == PEAP_RESUMPTION_YES) {
 849                         /* we're good, send success TLV */
 850                         t->status = PEAP_STATUS_SENT_TLV_SUCCESS;
 851                         eappeap_success(handler, tls_session);
 852                         return RLM_MODULE_HANDLED;
 853                 }
 854
 855                 t->status = PEAP_STATUS_PHASE2_INIT;
 856                 break;
 857
 858
 859         /*
 860          *      If we authenticated the user, then it's OK.
 861          */
 862         case PEAP_STATUS_SENT_TLV_SUCCESS:
 863                 if (eappeap_check_tlv(request, data + header, data_len - header)) {
 864                         RDEBUG2("Success");
 865                         return RLM_MODULE_OK;
 866                 }
 867
 868                 /*
 869                  *      Otherwise, the client rejected the session
 870                  *      resumption.  If the session is being re-used,
 871                  *      we need to do a full authentication.
 872                  *
 873                  *      We do this by sending an EAP-Identity request
 874                  *      inside of the PEAP tunnel.
 875                  */
 876                 if (t->session_resumption_state == PEAP_RESUMPTION_YES) {
 877                         RDEBUG2("Client rejected session resumption.  Re-starting full authentication");
 878
 879                         /*
 880                          *      Mark session resumption status.
 881                          */
 882                         t->status = PEAP_STATUS_INNER_IDENTITY_REQ_SENT;
 883                         t->session_resumption_state = PEAP_RESUMPTION_NO;
 884
 885                         eappeap_identity(handler, tls_session);
 886                         return RLM_MODULE_HANDLED;
 887                 }
 888
 889                 REDEBUG("We sent a success, but the client did not agree");
 890                 return RLM_MODULE_REJECT;
 891
 892         /*
 893          *      Supplicant ACKs our failure.
 894          */
 895         case PEAP_STATUS_SENT_TLV_FAILURE:
 896                 if (rad_debug_lvl) {
 897                         RINDENT();
 898                         REDEBUG("The users session was previously rejected: returning reject (again.)");
 899                         RIDEBUG("This means you need to read the PREVIOUS messages in the debug output");
 900                         RIDEBUG("to find out the reason why the user was rejected");
 901                         RIDEBUG("Look for \"reject\" or \"fail\".  Those earlier messages will tell you");
 902                         RIDEBUG("what went wrong, and how to fix the problem");
 903                         REXDENT();
 904                 }
 905
 906                 return RLM_MODULE_REJECT;
 907
 908                 case PEAP_STATUS_PHASE2_INIT:
 909                         RDEBUG("In state machine in phase2 init?");
 910
 911                 case PEAP_STATUS_PHASE2:
 912                         break;
 913
 914                 default:
 915                         REDEBUG("Unhandled state in peap");
 916                         return RLM_MODULE_REJECT;
 917         }
 918
 919         fake = request_alloc_fake(request);
 920
 921         rad_assert(!fake->packet->vps);
 922
 923         switch (t->status) {
 924                 /*
 925                  *      If we're in PHASE2_INIT, the phase2 method hasn't been
 926                  *      sent an Identity packet yet; do so from the stored
 927                  *      username and this will kick off the phase2 eap method
 928                  */
 929
 930         case PEAP_STATUS_PHASE2_INIT: {
 931                 size_t len = t->username->vp_length + EAP_HEADER_LEN + 1;
 932                 uint8_t *q;
 933
 934                 t->status = PEAP_STATUS_PHASE2;
 935
 936                 vp = fr_pair_afrom_num(fake->packet, PW_EAP_MESSAGE, 0);
 937                 vp->vp_length = len;
 938                 vp->vp_octets = q = talloc_array(vp, uint8_t, vp->vp_length);
 939
 940                 q[0] = PW_EAP_RESPONSE;
 941                 q[1] = eap_ds->response->id;
 942                 q[2] = (len >> 8) & 0xff;
 943                 q[3] = len & 0xff;
 944                 q[4] = PW_EAP_IDENTITY;
 945
 946                 memcpy(q + EAP_HEADER_LEN + 1,
 947                        t->username->vp_strvalue, t->username->vp_length);
 948
 949                 fr_pair_add(&fake->packet->vps, vp);
 950
 951                 if (t->default_method != 0) {
 952                         RDEBUG2("Setting default EAP type for tunneled EAP session");
 953                         vp = fr_pair_make(fake, &fake->config, "EAP-Type", "0", T_OP_EQ);
 954                         vp->vp_integer = t->default_method;
 955                 }
 956                 break; }
 957
 958         case PEAP_STATUS_PHASE2:
 959                 fake->packet->vps = eap2vp(request, fake->packet,
 960                                            eap_ds, data, data_len, tls_session->peap_flag);
 961                 if (!fake->packet->vps) {
 962                         talloc_free(fake);
 963                         RDEBUG2("Unable to convert tunneled EAP packet to internal server data structures");
 964                         return RLM_MODULE_REJECT;
 965                 }
 966                 break;
 967
 968         default:
 969                 REDEBUG("Invalid state change in PEAP");
 970                 return RLM_MODULE_REJECT;
 971         }
 972
 973         RDEBUG2("Got tunneled request");
 974         rdebug_pair_list(L_DBG_LVL_2, request, fake->packet->vps, NULL);
 975
 976         /*
 977          *      Update other items in the REQUEST data structure.
 978          */
 979         if (!t->username) {
 980                 /*
 981                  *      There's no User-Name in the tunneled session,
 982                  *      so we add one here, by pulling it out of the
 983                  *      EAP-Identity packet.
 984                  */
 985                 if ((data[header] == PW_EAP_IDENTITY) && (data_len > (1 + header))) {
 986                         t->username = fr_pair_make(t, NULL, "User-Name", NULL, T_OP_EQ);
 987                         rad_assert(t->username != NULL);
 988
 989                         fr_pair_value_bstrncpy(t->username, data + header + 1, data_len - header - 1);
 990
 991                         RDEBUG2("Got tunneled identity of %s", t->username->vp_strvalue);
 992
 993                         /*
 994                          *      If there's a default EAP type,
 995                          *      set it here.
 996                          */
 997                         if (t->default_method != 0) {
 998                                 RDEBUG2("Setting default EAP type for tunneled EAP session");
 999                                 vp = fr_pair_make(fake, &fake->config, "EAP-Type", "0", T_OP_EQ);
1000                                 vp->vp_integer = t->default_method;
1001                         }
1002                 }
1003         } /* else there WAS a t->username */
1004
1005         setup_fake_request(request, fake, t);
1006
1007         if ((vp = fr_pair_find_by_num(request->config, PW_VIRTUAL_SERVER, 0, TAG_ANY)) != NULL) {
1008                 fake->server = vp->vp_strvalue;
1009
1010         } else if (t->virtual_server) {
1011                 fake->server = t->virtual_server;
1012
1013         } /* else fake->server == request->server */
1014
1015         if (fake->server) {
1016                 RDEBUG2("Sending tunneled request to %s", fake->server);
1017         } else {
1018                 RDEBUG2("Sending tunnelled request");
1019         }
1020         rdebug_pair_list(L_DBG_LVL_2, request, fake->packet->vps, NULL);
1021
1022         /*
1023          *      Call authentication recursively, which will
1024          *      do PAP, CHAP, MS-CHAP, etc.
1025          */
1026         rad_virtual_server(fake);
1027
1028         /*
1029          *      Note that we don't do *anything* with the reply
1030          *      attributes.
1031          */
1032         RDEBUG2("Got tunneled reply code %d", fake->reply->code);
1033         rdebug_pair_list(L_DBG_LVL_2, request, fake->reply->vps, NULL);
1034
1035         /*
1036          *      Decide what to do with the reply.
1037          */
1038         switch (fake->reply->code) {
1039         case 0:                 /* No reply code, must be proxied... */
1040 #ifdef WITH_PROXY
1041                 vp = fr_pair_find_by_num(fake->config, PW_PROXY_TO_REALM, 0, TAG_ANY);
1042
1043                 if (vp) {
1044                         eap_tunnel_data_t *tunnel;
1045
1046                         /*
1047                          *      The tunneled request was NOT handled,
1048                          *      it has to be proxied.  This means that
1049                          *      the "authenticate" stage was never
1050                          *      performed.
1051                          *
1052                          *      If we are told to NOT proxy the
1053                          *      tunneled request as EAP, then this
1054                          *      means that we've got to decode it,
1055                          *      which means that we MUST run the
1056                          *      "authenticate" portion by hand, here.
1057                          *
1058                          *      Once the tunneled EAP session is ALMOST
1059                          *      done, THEN we proxy it...
1060                          */
1061                         if (!t->proxy_tunneled_request_as_eap) {
1062                                 fake->options |= RAD_REQUEST_OPTION_PROXY_EAP;
1063
1064                                 /*
1065                                  *      Hmm... should we check for
1066                                  *      Auth-Type & EAP-Message here?
1067                                  */
1068
1069                                 if (!auth_type_eap) {
1070                                         RERROR("You must set 'inner_eap_module' in the 'peap' configuration");
1071                                         RERROR("This is required in order to proxy the inner EAP session.");
1072                                         rcode = RLM_MODULE_REJECT;
1073                                         goto done;
1074                                 }
1075
1076                                 /*
1077                                  *      Run the EAP authentication.
1078                                  */
1079                                 RDEBUG2("Calling authenticate in order to initiate tunneled EAP session");
1080                                 rcode = process_authenticate(auth_type_eap, fake);
1081                                 if (rcode == RLM_MODULE_OK) {
1082                                         /*
1083                                          *      Authentication succeeded! Rah!
1084                                          */
1085                                         fake->reply->code = PW_CODE_ACCESS_ACCEPT;
1086                                         goto do_process;
1087                                 }
1088
1089                                 if (rcode != RLM_MODULE_HANDLED) {
1090                                         RDEBUG("Can't handle the return code %d", rcode);
1091                                         rcode = RLM_MODULE_REJECT;
1092                                         goto done;
1093                                 }
1094
1095                                 /*
1096                                  *      The module decided it wasn't
1097                                  *      done.  Handle it like normal.
1098                                  */
1099                                 if ((fake->options & RAD_REQUEST_OPTION_PROXY_EAP) == 0) {
1100                                         RDEBUG2("Cancelling proxy to realm %s until the tunneled EAP session "
1101                                                 "has been established", vp->vp_strvalue);
1102                                         goto do_process;
1103                                 }
1104
1105                                 /*
1106                                  *      The module has decoded the
1107                                  *      EAP-Message into another set
1108                                  *      of attributes.
1109                                  */
1110                                 fr_pair_delete_by_num(&fake->packet->vps,
1111                                            PW_EAP_MESSAGE, 0, TAG_ANY);
1112                         }
1113
1114                         RDEBUG2("Tunnelled authentication will be proxied to %s", vp->vp_strvalue);
1115
1116                         /*
1117                          *      Tell the original request that it's going
1118                          *      to be proxied.
1119                          */
1120                         fr_pair_list_mcopy_by_num(request, &request->config,
1121                                    &fake->config,
1122                                    PW_PROXY_TO_REALM, 0, TAG_ANY);
1123
1124                         /*
1125                          *      Seed the proxy packet with the
1126                          *      tunneled request.
1127                          */
1128                         rad_assert(!request->proxy);
1129                         request->proxy = talloc_steal(request, fake->packet);
1130                         memset(&request->proxy->src_ipaddr, 0,
1131                                sizeof(request->proxy->src_ipaddr));
1132                         memset(&request->proxy->dst_ipaddr, 0,
1133                                sizeof(request->proxy->dst_ipaddr));
1134                         request->proxy->src_port = 0;
1135                         request->proxy->dst_port = 0;
1136                         fake->packet = NULL;
1137                         rad_free(&fake->reply);
1138                         fake->reply = NULL;
1139
1140                         /*
1141                          *      Set up the callbacks for the tunnel
1142                          */
1143                         tunnel = talloc_zero(request, eap_tunnel_data_t);
1144                         tunnel->tls_session = tls_session;
1145                         tunnel->callback = eappeap_postproxy;
1146
1147                         /*
1148                          *      Associate the callback with the request.
1149                          */
1150                         rcode = request_data_add(request,
1151                                                  request->proxy,
1152                                                  REQUEST_DATA_EAP_TUNNEL_CALLBACK,
1153                                                  tunnel, false);
1154                         rad_assert(rcode == 0);
1155
1156                         /*
1157                          *      We're not proxying it as EAP, so we've got
1158                          *      to do the callback later.
1159                          */
1160                         if ((fake->options & RAD_REQUEST_OPTION_PROXY_EAP) != 0) {
1161                                 RDEBUG2("Remembering to do EAP-MS-CHAP-V2 post-proxy");
1162
1163                                 /*
1164                                  *      rlm_eap.c has taken care of associating
1165                                  *      the handler with the fake request.
1166                                  *
1167                                  *      So we associate the fake request with
1168                                  *      this request.
1169                                  */
1170                                 rcode = request_data_add(request, request->proxy,
1171                                                          REQUEST_DATA_EAP_MSCHAP_TUNNEL_CALLBACK,
1172                                                          fake, true);
1173                                 rad_assert(rcode == 0);
1174
1175                                 /*
1176                                  *      Do NOT free the fake request!
1177                                  */
1178                                 return RLM_MODULE_UPDATED;
1179                         }
1180
1181                         /*
1182                          *      Didn't authenticate the packet, but
1183                          *      we're proxying it.
1184                          */
1185                         rcode = RLM_MODULE_UPDATED;
1186
1187                 } else
1188 #endif  /* WITH_PROXY */
1189                   {
1190                         REDEBUG("Unknown RADIUS packet type %d: rejecting tunneled user", fake->reply->code);
1191                         rcode = RLM_MODULE_REJECT;
1192                   }
1193                 break;
1194
1195         default:
1196 #ifdef WITH_PROXY
1197         do_process:
1198 #endif
1199                 rcode = process_reply(handler, tls_session, request,
1200                                       fake->reply);
1201                 break;
1202         }
1203
1204 #ifdef WITH_PROXY
1205  done:
1206 #endif
1207         talloc_free(fake);
1208
1209         return rcode;
1210 }
1211
1212 static int CC_HINT(nonnull) setup_fake_request(REQUEST *request, REQUEST *fake, peap_tunnel_t *t) {
1213
1214         VALUE_PAIR *vp;
1215
1216         /*
1217          *      Tell the request that it's a fake one.
1218          */
1219         fr_pair_make(fake->packet, &fake->packet->vps, "Freeradius-Proxied-To", "127.0.0.1", T_OP_EQ);
1220
1221         if (t->username) {
1222                 vp = fr_pair_list_copy(fake->packet, t->username);
1223                 fr_pair_add(&fake->packet->vps, vp);
1224                 fake->username = vp;
1225                 RDEBUG2("Setting User-Name to %s", fake->username->vp_strvalue);
1226         } else {
1227                 RDEBUG2("No tunnel username (SSL resumption?)");
1228         }
1229
1230
1231         /*
1232          *      Add the State attribute, too, if it exists.
1233          */
1234         if (t->state) {
1235                 vp = fr_pair_list_copy(fake->packet, t->state);
1236                 if (vp) fr_pair_add(&fake->packet->vps, vp);
1237         }
1238
1239         /*
1240          *      If this is set, we copy SOME of the request attributes
1241          *      from outside of the tunnel to inside of the tunnel.
1242          *
1243          *      We copy ONLY those attributes which do NOT already
1244          *      exist in the tunneled request.
1245          *
1246          *      This code is copied from ../rlm_eap_ttls/ttls.c
1247          */
1248         if (t->copy_request_to_tunnel) {
1249                 VALUE_PAIR *copy;
1250                 vp_cursor_t cursor;
1251
1252                 for (vp = fr_cursor_init(&cursor, &request->packet->vps);
1253                      vp;
1254                      vp = fr_cursor_next(&cursor)) {
1255                         /*
1256                          *      The attribute is a server-side thingy,
1257                          *      don't copy it.
1258                          */
1259                         if ((vp->da->attr > 255) && (((vp->da->attr >> 16) & 0xffff) == 0)) {
1260                                 continue;
1261                         }
1262
1263                         /*
1264                          *      The outside attribute is already in the
1265                          *      tunnel, don't copy it.
1266                          *
1267                          *      This works for BOTH attributes which
1268                          *      are originally in the tunneled request,
1269                          *      AND attributes which are copied there
1270                          *      from below.
1271                          */
1272                         if (fr_pair_find_by_da(fake->packet->vps, vp->da, TAG_ANY)) continue;
1273
1274                         /*
1275                          *      Some attributes are handled specially.
1276                          */
1277                         if (!vp->da->vendor) switch (vp->da->attr) {
1278                                 /*
1279                                  *      NEVER copy Message-Authenticator,
1280                                  *      EAP-Message, or State.  They're
1281                                  *      only for outside of the tunnel.
1282                                  */
1283                         case PW_USER_NAME:
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:
1290                         case PW_STATE:
1291                                 continue;
1292
1293                                 /*
1294                                  *      By default, copy it over.
1295                                  */
1296                         default:
1297                                 break;
1298                         }
1299
1300                         /*
1301                          *      Don't copy from the head, we've already
1302                          *      checked it.
1303                          */
1304                         copy = fr_pair_list_copy_by_num(fake->packet, vp, vp->da->attr, vp->da->vendor, TAG_ANY);
1305                         fr_pair_add(&fake->packet->vps, copy);
1306                 }
1307         }
1308
1309         return 0;
1310 }