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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  *   Copyright 2003 Alan DeKok <aland@freeradius.org>
  21  */
  22 #include "eap_tls.h"
  23 #include "eap_peap.h"
  24
  25 /*
  26  *      Send protected EAP-Failure
  27  *
  28  *       Result-TLV = Failure
  29  */
  30 static int eappeap_failure(EAP_HANDLER *handler, tls_session_t *tls_session)
  31 {
  32         uint8_t tlv_packet[11];
  33
  34         DEBUG2("  rlm_eap_peap: FAILURE");
  35
  36         tlv_packet[0] = PW_EAP_REQUEST;
  37         tlv_packet[1] = handler->eap_ds->response->id +1;
  38         tlv_packet[2] = 0;
  39         tlv_packet[3] = 11;     /* length of this packet */
  40         tlv_packet[4] = PW_EAP_TLV;
  41         tlv_packet[5] = 0x80;
  42         tlv_packet[6] = EAP_TLV_ACK_RESULT;
  43         tlv_packet[7] = 0;
  44         tlv_packet[8] = 2;      /* length of the data portion */
  45         tlv_packet[9] = 0;
  46         tlv_packet[10] = EAP_TLV_FAILURE;
  47
  48         record_plus(&tls_session->clean_in, tlv_packet, 11);
  49
  50         /*
  51          *      FIXME: Check the return code.
  52          */
  53         tls_handshake_send(tls_session);
  54         record_init(&tls_session->clean_in);
  55
  56         return 1;
  57 }
  58
  59
  60 /*
  61  *      Send protected EAP-Success
  62  *
  63  *       Result-TLV = Success
  64  */
  65 static int eappeap_success(EAP_HANDLER *handler, tls_session_t *tls_session)
  66 {
  67         uint8_t tlv_packet[11];
  68
  69         DEBUG2("  rlm_eap_peap: SUCCESS");
  70
  71         tlv_packet[0] = PW_EAP_REQUEST;
  72         tlv_packet[1] = handler->eap_ds->response->id +1;
  73         tlv_packet[2] = 0;
  74         tlv_packet[3] = 11;     /* length of this packet */
  75         tlv_packet[4] = PW_EAP_TLV;
  76         tlv_packet[5] = 0x80;   /* mandatory AVP */
  77         tlv_packet[6] = EAP_TLV_ACK_RESULT;
  78         tlv_packet[7] = 0;
  79         tlv_packet[8] = 2;      /* length of the data portion */
  80         tlv_packet[9] = 0;
  81         tlv_packet[10] = EAP_TLV_SUCCESS;
  82
  83         record_plus(&tls_session->clean_in, tlv_packet, 11);
  84
  85         /*
  86          *      FIXME: Check the return code.
  87          */
  88         tls_handshake_send(tls_session);
  89         record_init(&tls_session->clean_in);
  90
  91         return 1;
  92 }
  93
  94
  95 /*
  96  *      Verify the tunneled EAP message.
  97  */
  98 static int eapmessage_verify(const uint8_t *data, unsigned int data_len)
  99 {
 100         const eap_packet_t *eap_packet = (const eap_packet_t *) data;
 101         uint8_t eap_type;
 102         char identity[256];
 103
 104         if (!data || (data_len <= 1)) {
 105                 return 0;
 106         }
 107
 108         eap_type = *data;
 109         switch (eap_type) {
 110         case PW_EAP_IDENTITY:
 111                 memcpy(identity, data + 1, data_len - 1);
 112                 identity[data_len - 1] = '\0';
 113                 DEBUG2("  rlm_eap_peap: Identity - %s", identity);
 114                 return 1;
 115                 break;
 116
 117                 /*
 118                  *      If the first byte of the packet is
 119                  *      EAP-Response, and the EAP data is a TLV,
 120                  *      then it looks OK...
 121                  */
 122         case PW_EAP_RESPONSE:
 123                 if (eap_packet->data[0] == PW_EAP_TLV) {
 124                         DEBUG2("  rlm_eap_peap: Received EAP-TLV response.");
 125                         return 1;
 126                 }
 127                 DEBUG2("  rlm_eap_peap: Got something weird.");
 128                 break;
 129
 130
 131                 /*
 132                  *      We normally do Microsoft MS-CHAPv2 (26), versus
 133                  *      Cisco MS-CHAPv2 (29).
 134                  */
 135         case PW_EAP_MSCHAPV2:
 136         default:
 137                 DEBUG2("  rlm_eap_peap: EAP type %s",
 138                        eaptype_type2name(eap_type,
 139                                          identity, sizeof(identity)));
 140                 return 1;
 141                 break;
 142         }
 143
 144         return 0;
 145 }
 146
 147 /*
 148  *      Convert a pseudo-EAP packet to a list of VALUE_PAIR's.
 149  */
 150 static VALUE_PAIR *eap2vp(EAP_DS *eap_ds,
 151                           const uint8_t *data, unsigned int data_len)
 152 {
 153         VALUE_PAIR *vp = NULL;
 154
 155         /*
 156          *      Sanity check this...
 157          */
 158         if (data_len + EAP_HEADER_LEN > MAX_STRING_LEN) {
 159                 radlog(L_ERR, "rlm_eap_peap: EAP Response packet is too large.  Code must be fixed to handle this.");
 160                 return NULL;
 161         }
 162
 163         vp = paircreate(PW_EAP_MESSAGE, PW_TYPE_OCTETS);
 164         if (!vp) {
 165                 DEBUG2("  rlm_eap_peap: Failure in creating VP");
 166                 return NULL;
 167         }
 168
 169         /*
 170          *      Hand-build an EAP packet from the crap in PEAP version 0.
 171          */
 172         vp->strvalue[0] = PW_EAP_RESPONSE;
 173         vp->strvalue[1] = eap_ds->response->id;
 174         vp->strvalue[2] = 0;
 175         vp->strvalue[3] = EAP_HEADER_LEN + data_len;
 176
 177         memcpy(vp->strvalue + EAP_HEADER_LEN, data, data_len);
 178         vp->length = EAP_HEADER_LEN + data_len;
 179
 180         return vp;
 181 }
 182
 183
 184 /*
 185  *      Convert a list of VALUE_PAIR's to an EAP packet, through the
 186  *      simple expedient of dumping the EAP message
 187  */
 188 static int vp2eap(tls_session_t *tls_session, VALUE_PAIR *vp)
 189 {
 190         if (vp->next != NULL) {
 191                 radlog(L_ERR, "rlm_eap_peap: EAP Request packet is too large.  Code must be fixed to handle this.");
 192                 return 0;
 193         }
 194
 195         /*
 196          *      Skip the id, code, and length.  Just write the EAP
 197          *      type & data to the client.
 198          */
 199 #ifndef NDEBUG
 200         if (debug_flag > 2) {
 201                 int i;
 202                 int total = vp->length - 4;
 203
 204                 if (debug_flag > 0) for (i = 0; i < total; i++) {
 205                         if ((i & 0x0f) == 0) printf("  PEAP tunnel data out %04x: ", i);
 206
 207                         printf("%02x ", vp->strvalue[i + 4]);
 208
 209                         if ((i & 0x0f) == 0x0f) printf("\n");
 210                 }
 211                 if ((total & 0x0f) != 0) printf("\n");
 212         }
 213 #endif
 214
 215         /*
 216          *      Send the EAP data, WITHOUT the header.
 217          */
 218 #if 1
 219         record_plus(&tls_session->clean_in, vp->strvalue + EAP_HEADER_LEN,
 220                 vp->length - EAP_HEADER_LEN);
 221 #else
 222         record_plus(&tls_session->clean_in, vp->strvalue, vp->length);
 223 #endif
 224         tls_handshake_send(tls_session);
 225         record_init(&tls_session->clean_in);
 226
 227         return 1;
 228 }
 229
 230
 231 /*
 232  *      See if there's a TLV in the response.
 233  */
 234 static int eappeap_check_tlv(const uint8_t *data)
 235 {
 236         const eap_packet_t *eap_packet = (const eap_packet_t *) data;
 237
 238         /*
 239          *      Look for success or failure.
 240          */
 241         if ((eap_packet->code == PW_EAP_RESPONSE) &&
 242             (eap_packet->data[0] == PW_EAP_TLV)) {
 243                 if (data[10] == EAP_TLV_SUCCESS) {
 244                         return 1;
 245                 }
 246
 247                 if (data[10] == EAP_TLV_FAILURE) {
 248                         DEBUG2("  rlm_eap_peap: Client rejected our response.  The password is probably incorrect.");
 249                         return 0;
 250                 }
 251         }
 252
 253         return 0;
 254 }
 255
 256
 257 /*
 258  *      Use a reply packet to determine what to do.
 259  */
 260 static int process_reply(EAP_HANDLER *handler, tls_session_t *tls_session,
 261                          REQUEST *request, RADIUS_PACKET *reply)
 262 {
 263         int rcode = RLM_MODULE_REJECT;
 264         VALUE_PAIR *vp;
 265         peap_tunnel_t *t = tls_session->opaque;
 266
 267         switch (reply->code) {
 268         case PW_AUTHENTICATION_ACK:
 269                 DEBUG2("  PEAP: Tunneled authentication was successful.");
 270                 t->status = PEAP_STATUS_SENT_TLV_SUCCESS;
 271                 eappeap_success(handler, tls_session);
 272                 rcode = RLM_MODULE_HANDLED;
 273
 274                 /*
 275                  *      If we've been told to use the attributes from
 276                  *      the reply, then do so.
 277                  *
 278                  *      WARNING: This may leak information about the
 279                  *      tunneled user!
 280                  */
 281                 if (t->use_tunneled_reply) {
 282                         pairadd(&request->reply->vps, reply->vps);
 283                         reply->vps = NULL;
 284                 }
 285                 break;
 286
 287         case PW_AUTHENTICATION_REJECT:
 288                 DEBUG2("  PEAP: Tunneled authentication was rejected.");
 289                 t->status = PEAP_STATUS_SENT_TLV_FAILURE;
 290                 eappeap_failure(handler, tls_session);
 291                 rcode = RLM_MODULE_HANDLED;
 292                 break;
 293
 294         case PW_ACCESS_CHALLENGE:
 295                 DEBUG2("  PEAP: Got tunneled Access-Challenge");
 296
 297                 /*
 298                  *      Keep the State attribute, if necessary.
 299                  *
 300                  *      Get rid of the old State, too.
 301                  */
 302                 pairfree(&t->state);
 303                 pairmove2(&t->state, &(reply->vps), PW_STATE);
 304
 305                 /*
 306                  *      PEAP takes only EAP-Message attributes inside
 307                  *      of the tunnel.  Any Reply-Message in the
 308                  *      Access-Challenge is ignored.
 309                  */
 310                 vp = NULL;
 311                 pairmove2(&vp, &(reply->vps), PW_EAP_MESSAGE);
 312
 313                 /*
 314                  *      Handle the ACK, by tunneling any necessary reply
 315                  *      VP's back to the client.
 316                  */
 317                 if (vp) {
 318                         vp2eap(tls_session, vp);
 319                         pairfree(&vp);
 320                 }
 321
 322                 rcode = RLM_MODULE_HANDLED;
 323                 break;
 324
 325         default:
 326                 DEBUG2("  PEAP: Unknown RADIUS packet type %d: rejecting tunneled user", reply->code);
 327                 rcode = RLM_MODULE_REJECT;
 328                 break;
 329         }
 330
 331         return rcode;
 332 }
 333
 334
 335 /*
 336  *      Do post-proxy processing,
 337  */
 338 static int eappeap_postproxy(EAP_HANDLER *handler, void *data)
 339 {
 340         int rcode;
 341         tls_session_t *tls_session = (tls_session_t *) data;
 342
 343         DEBUG2("  PEAP: Passing reply from proxy back into the tunnel.");
 344
 345         /*
 346          *      If there was no EAP-Message in the reply packet, then
 347          *      we know that we're supposed to re-run the "authenticate"
 348          *      stage, in order to get the right kind of handling...
 349          */
 350
 351         /*
 352          *      Process the reply from the home server.
 353          */
 354         rcode = process_reply(handler, tls_session, handler->request,
 355                               handler->request->proxy_reply);
 356
 357         /*
 358          *      The proxy code uses the reply from the home server as
 359          *      the basis for the reply to the NAS.  We don't want that,
 360          *      so we toss it, after we've had our way with it.
 361          */
 362         pairfree(&handler->request->proxy_reply->vps);
 363
 364         switch (rcode) {
 365         case RLM_MODULE_REJECT:
 366                 DEBUG2("  PEAP: Reply was rejected");
 367                 eaptls_fail(handler->eap_ds, 0);
 368                 return 0;
 369
 370         case RLM_MODULE_HANDLED:
 371                 DEBUG2("  PEAP: Reply was handled");
 372                 eaptls_request(handler->eap_ds, tls_session);
 373                 return 1;
 374
 375         case RLM_MODULE_OK:
 376                 DEBUG2("  PEAP: Reply was OK");
 377                 eaptls_success(handler->eap_ds, 0);
 378                 eaptls_gen_mppe_keys(&handler->request->reply->vps,
 379                                      tls_session->ssl,
 380                                      "client EAP encryption");
 381                 return 1;
 382
 383         default:
 384                 DEBUG2("  PEAP: Reply was unknown.");
 385                 break;
 386         }
 387
 388         eaptls_fail(handler->eap_ds, 0);
 389         return 0;
 390 }
 391
 392
 393 /*
 394  *      Process the pseudo-EAP contents of the tunneled data.
 395  */
 396 int eappeap_process(EAP_HANDLER *handler, tls_session_t *tls_session)
 397 {
 398         int err;
 399         peap_tunnel_t *t = tls_session->opaque;
 400         REQUEST *fake;
 401         VALUE_PAIR *vp;
 402         int rcode = RLM_MODULE_REJECT;
 403         const uint8_t *data;
 404         unsigned int data_len;
 405         unsigned char buffer[1024];
 406 #ifndef NDEBUG
 407         int i;
 408 #endif
 409
 410         REQUEST *request = handler->request;
 411         EAP_DS *eap_ds = handler->eap_ds;
 412
 413         /*
 414          *      Grab the dirty data, and copy it to our buffer.
 415          *
 416          *      I *really* don't like these 'record_t' things...
 417          */
 418         data_len = record_minus(&tls_session->dirty_in, buffer, sizeof(buffer));
 419         data = buffer;
 420
 421         /*
 422          *      Write the data from the dirty buffer (i.e. packet
 423          *      data) into the buffer which we will give to SSL for
 424          *      decoding.
 425          *
 426          *      Some of this code COULD technically go into the TLS
 427          *      module, in eaptls_process(), where it returns EAPTLS_OK.
 428          *
 429          *      Similarly, the writing of data to the SSL context could
 430          *      go there, too...
 431          */
 432         BIO_write(tls_session->into_ssl, buffer, data_len);
 433         record_init(&tls_session->clean_out);
 434
 435         /*
 436          *      Read (and decrypt) the tunneled data from the SSL session,
 437          *      and put it into the decrypted data buffer.
 438          */
 439         err = SSL_read(tls_session->ssl, tls_session->clean_out.data,
 440                        sizeof(tls_session->clean_out.data));
 441         if (err < 0) {
 442                 /*
 443                  *      FIXME: Call SSL_get_error() to see what went
 444                  *      wrong.
 445                  */
 446                 radlog(L_INFO, "rlm_eap_peap: SSL_read Error");
 447                 return RLM_MODULE_REJECT;
 448         }
 449
 450         /*
 451          *      If there's no data, maybe this is an ACK to an
 452          *      MS-CHAP2-Success.
 453          */
 454         if (err == 0) {
 455                 /*
 456                  *      FIXME: Call SSL_get_error() to see what went
 457                  *      wrong.
 458                  */
 459                 radlog(L_INFO, "rlm_eap_peap: No data inside of the tunnel.");
 460                 return RLM_MODULE_REJECT;
 461         }
 462
 463         data_len = tls_session->clean_out.used = err;
 464         data = tls_session->clean_out.data;
 465
 466 #ifndef NDEBUG
 467         if (debug_flag > 2) {
 468                 for (i = 0; i < data_len; i++) {
 469                         if ((i & 0x0f) == 0) printf("  PEAP tunnel data in %04x: ", i);
 470
 471                         printf("%02x ", data[i]);
 472
 473                         if ((i & 0x0f) == 0x0f) printf("\n");
 474                 }
 475                 if ((data_len & 0x0f) != 0) printf("\n");
 476         }
 477 #endif
 478
 479         if (!eapmessage_verify(data, data_len)) {
 480                 return RLM_MODULE_REJECT;
 481         }
 482
 483         DEBUG2("  rlm_eap_peap: Tunneled data is valid.");
 484
 485         /*
 486          *      If we authenticated the user, then it's OK.
 487          */
 488         if (t->status == PEAP_STATUS_SENT_TLV_SUCCESS) {
 489                 if (eappeap_check_tlv(data)) {
 490                         DEBUG2("  rlm_eap_peap: Success");
 491                         return RLM_MODULE_OK;
 492                 }
 493
 494                 return RLM_MODULE_REJECT;
 495
 496         } else if (t->status == PEAP_STATUS_SENT_TLV_FAILURE) {
 497                 DEBUG2("  rlm_eap_peap:  Had sent TLV failure, rejecting.");
 498                 return RLM_MODULE_REJECT;
 499         }
 500
 501         fake = request_alloc_fake(request);
 502
 503         rad_assert(fake->packet->vps == NULL);
 504
 505         fake->packet->vps = eap2vp(eap_ds, data, data_len);
 506         if (!fake->packet->vps) {
 507                 DEBUG2("  rlm_eap_peap: Unable to convert tunneled EAP packet to internal server data structures");
 508                 return PW_AUTHENTICATION_REJECT;
 509         }
 510
 511 #ifndef NDEBUG
 512         if (debug_flag > 0) {
 513           printf("  PEAP: Got tunneled EAP-Message\n");
 514
 515           for (vp = fake->packet->vps; vp != NULL; vp = vp->next) {
 516             putchar('\t');vp_print(stdout, vp);putchar('\n');
 517           }
 518         }
 519 #endif
 520
 521         /*
 522          *      Tell the request that it's a fake one.
 523          */
 524         vp = pairmake("Freeradius-Proxied-To", "127.0.0.1", T_OP_EQ);
 525         if (vp) {
 526                 pairadd(&fake->packet->vps, vp);
 527         }
 528
 529         /*
 530          *      Update other items in the REQUEST data structure.
 531          */
 532         if (!t->username) {
 533                 /*
 534                  *      There's no User-Name in the tunneled session,
 535                  *      so we add one here, by pulling it out of the
 536                  *      EAP-Identity packet.
 537                  */
 538                 if ((data[0] == PW_EAP_IDENTITY) && (data_len > 1)) {
 539                         t->username = pairmake("User-Name", "", T_OP_EQ);
 540                         rad_assert(t->username != NULL);
 541
 542                         memcpy(t->username->strvalue, data+1, data_len - 1);
 543                         t->username->length = data_len -1;
 544                         t->username->strvalue[t->username->length] = 0;
 545                         DEBUG2("  PEAP: Got tunneled identity of %s", t->username->strvalue);
 546
 547                         /*
 548                          *      If there's a default EAP type,
 549                          *      set it here.
 550                          */
 551                         if (t->default_eap_type != 0) {
 552                           DEBUG2("  PEAP: Setting default EAP type for tunneled EAP session.");
 553                           vp = pairmake("EAP-Type", "0", T_OP_EQ);
 554                           vp->lvalue = t->default_eap_type;
 555                           pairadd(&fake->config_items, vp);
 556                         }
 557                 }
 558         } /* else there WAS a t->username */
 559
 560         if (t->username) {
 561                 vp = paircopy(t->username);
 562                 pairadd(&fake->packet->vps, vp);
 563                 fake->username = pairfind(fake->packet->vps, PW_USER_NAME);
 564         }
 565
 566         /*
 567          *      Add the State attribute, too, if it exists.
 568          */
 569         if (t->state) {
 570                 DEBUG2("  PEAP: Adding old state with %02x %02x",
 571                        t->state->strvalue[0], t->state->strvalue[1]);
 572                 vp = paircopy(t->state);
 573                 if (vp) pairadd(&fake->packet->vps, vp);
 574         }
 575
 576         /*
 577          *      If this is set, we copy SOME of the request attributes
 578          *      from outside of the tunnel to inside of the tunnel.
 579          *
 580          *      We copy ONLY those attributes which do NOT already
 581          *      exist in the tunneled request.
 582          *
 583          *      This code is copied from ../rlm_eap_ttls/ttls.c
 584          */
 585         if (t->copy_request_to_tunnel) {
 586                 VALUE_PAIR *copy;
 587
 588                 for (vp = request->packet->vps; vp != NULL; vp = vp->next) {
 589                         /*
 590                          *      The attribute is a server-side thingy,
 591                          *      don't copy it.
 592                          */
 593                         if ((vp->attribute > 255) &&
 594                             (((vp->attribute >> 16) & 0xffff) == 0)) {
 595                                 continue;
 596                         }
 597
 598                         /*
 599                          *      The outside attribute is already in the
 600                          *      tunnel, don't copy it.
 601                          *
 602                          *      This works for BOTH attributes which
 603                          *      are originally in the tunneled request,
 604                          *      AND attributes which are copied there
 605                          *      from below.
 606                          */
 607                         if (pairfind(fake->packet->vps, vp->attribute)) {
 608                                 continue;
 609                         }
 610
 611                         /*
 612                          *      Some attributes are handled specially.
 613                          */
 614                         switch (vp->attribute) {
 615                                 /*
 616                                  *      NEVER copy Message-Authenticator,
 617                                  *      EAP-Message, or State.  They're
 618                                  *      only for outside of the tunnel.
 619                                  */
 620                         case PW_USER_NAME:
 621                         case PW_USER_PASSWORD:
 622                         case PW_CHAP_PASSWORD:
 623                         case PW_CHAP_CHALLENGE:
 624                         case PW_PROXY_STATE:
 625                         case PW_MESSAGE_AUTHENTICATOR:
 626                         case PW_EAP_MESSAGE:
 627                         case PW_STATE:
 628                                 continue;
 629                                 break;
 630
 631                                 /*
 632                                  *      By default, copy it over.
 633                                  */
 634                         default:
 635                                 break;
 636                         }
 637
 638                         /*
 639                          *      Don't copy from the head, we've already
 640                          *      checked it.
 641                          */
 642                         copy = paircopy2(vp, vp->attribute);
 643                         pairadd(&fake->packet->vps, copy);
 644                 }
 645         }
 646
 647 #ifndef NDEBUG
 648         if (debug_flag > 0) {
 649                 printf("  PEAP: Sending tunneled request\n");
 650
 651                 for (vp = fake->packet->vps; vp != NULL; vp = vp->next) {
 652                         putchar('\t');vp_print(stdout, vp);putchar('\n');
 653                 }
 654         }
 655 #endif
 656
 657         /*
 658          *      Call authentication recursively, which will
 659          *      do PAP, CHAP, MS-CHAP, etc.
 660          */
 661         rad_authenticate(fake);
 662
 663         /*
 664          *      Note that we don't do *anything* with the reply
 665          *      attributes.
 666          */
 667 #ifndef NDEBUG
 668         if (debug_flag > 0) {
 669                 printf("  PEAP: Got tunneled reply RADIUS code %d\n",
 670                  fake->reply->code);
 671
 672                 for (vp = fake->reply->vps; vp != NULL; vp = vp->next) {
 673                         putchar('\t');vp_print(stdout, vp);putchar('\n');
 674                 }
 675         }
 676 #endif
 677
 678         /*
 679          *      Decide what to do with the reply.
 680          */
 681         switch (fake->reply->code) {
 682         case 0:                 /* No reply code, must be proxied... */
 683                 vp = pairfind(fake->config_items, PW_PROXY_TO_REALM);
 684
 685                 if (vp) {
 686                         eap_tunnel_data_t *tunnel;
 687
 688
 689                         /*
 690                          *      The tunneled request was NOT handled,
 691                          *      it has to be proxied.  This means that
 692                          *      the "authenticate" stage was never
 693                          *      performed.
 694                          *
 695                          *      If we are told to NOT proxy the
 696                          *      tunneled request as EAP, then this
 697                          *      means that we've got to decode it,
 698                          *      which means that we MUST run the
 699                          *      "authenticate" portion by hand, here.
 700                          *
 701                          *      Once the tunneled EAP session is ALMOST
 702                          *      done, THEN we proxy it...
 703                          */
 704                         if (!t->proxy_tunneled_request_as_eap) {
 705                                 int rcode;
 706
 707                                 fake->options |= RAD_REQUEST_OPTION_PROXY_EAP;
 708
 709                                 /*
 710                                  *      Hmm... should we check for
 711                                  *      Auth-Type & EAP-Message here?
 712                                  */
 713
 714
 715                                 /*
 716                                  *      Run the EAP authentication.
 717                                  */
 718                                 DEBUG2("  PEAP: Calling authenticate in order to initiate tunneled EAP session.");
 719                                 rcode = module_authenticate(PW_AUTHTYPE_EAP, fake);
 720                                 if (rcode != RLM_MODULE_HANDLED) {
 721                                         DEBUG2("  PEAP: Can't handle the return code %d", rcode);
 722                                         rcode = RLM_MODULE_REJECT;
 723                                         goto done;
 724                                 }
 725
 726                                 /*
 727                                  *      The module decided it wasn't
 728                                  *      done.  Handle it like normal.
 729                                  */
 730                                 if ((fake->options & RAD_REQUEST_OPTION_PROXY_EAP) == 0) {
 731                                         DEBUG2("    PEAP: Cancelling proxy to realm %s until the tunneled EAP session has been established", vp->strvalue);
 732                                         goto do_process;
 733                                 }
 734
 735                                 /*
 736                                  *      The module has decoded the
 737                                  *      EAP-Message into another set
 738                                  *      of attributes.
 739                                  */
 740                                 pairdelete(&fake->packet->vps,
 741                                            PW_EAP_MESSAGE);
 742                         }
 743
 744                         DEBUG2("  PEAP: Tunneled authentication will be proxied to %s", vp->strvalue);
 745
 746                         /*
 747                          *      Tell the original request that it's going
 748                          *      to be proxied.
 749                          */
 750                         pairmove2(&(request->config_items),
 751                                   &(fake->config_items),
 752                                   PW_PROXY_TO_REALM);
 753
 754                         /*
 755                          *      Seed the proxy packet with the
 756                          *      tunneled request.
 757                          */
 758                         rad_assert(request->proxy == NULL);
 759                         request->proxy = fake->packet;
 760                         fake->packet = NULL;
 761
 762                         /*
 763                          *      Set up the callbacks for the tunnel
 764                          */
 765                         tunnel = rad_malloc(sizeof(*tunnel));
 766                         memset(tunnel, 0, sizeof(*tunnel));
 767
 768                         tunnel->tls_session = tls_session;
 769                         tunnel->callback = eappeap_postproxy;
 770
 771                         /*
 772                          *      Associate the callback with the request.
 773                          */
 774                         rcode = request_data_add(request,
 775                                                  request->proxy,
 776                                                  REQUEST_DATA_EAP_TUNNEL_CALLBACK,
 777                                                  tunnel, free);
 778                         rad_assert(rcode == 0);
 779
 780                         /*
 781                          *      Didn't authenticate the packet, but
 782                          *      we're proxying it.
 783                          */
 784                         rcode = RLM_MODULE_UPDATED;
 785
 786                 } else {
 787                         DEBUG2("  PEAP: Unknown RADIUS packet type %d: rejecting tunneled user", fake->reply->code);
 788                         rcode = RLM_MODULE_REJECT;
 789                 }
 790                 break;
 791
 792         default:
 793         do_process:
 794                 rcode = process_reply(handler, tls_session, request,
 795                                       fake->reply);
 796                 break;
 797         }
 798
 799  done:
 800         request_free(&fake);
 801
 802         return rcode;
 803 }