src/main/tls.c

   1 /*
   2  * tls.c
   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 2001  hereUare Communications, Inc. <raghud@hereuare.com>
  21  * Copyright 2003  Alan DeKok <aland@freeradius.org>
  22  * Copyright 2006  The FreeRADIUS server project
  23  */
  24
  25 #include <freeradius-devel/ident.h>
  26 RCSID("$Id$")
  27
  28 #include <freeradius-devel/autoconf.h>
  29 #include <freeradius-devel/radiusd.h>
  30 #include <freeradius-devel/process.h>
  31 #include <freeradius-devel/rad_assert.h>
  32
  33 #ifdef HAVE_SYS_STAT_H
  34 #include <sys/stat.h>
  35 #endif
  36
  37 #ifdef WITH_TLS
  38 #ifdef HAVE_OPENSSL_RAND_H
  39 #include <openssl/rand.h>
  40 #endif
  41
  42 #ifdef HAVE_OPENSSL_OCSP_H
  43 #include <openssl/ocsp.h>
  44 #endif
  45
  46 #ifdef HAVE_PTHREAD_H
  47 #define PTHREAD_MUTEX_LOCK pthread_mutex_lock
  48 #define PTHREAD_MUTEX_UNLOCK pthread_mutex_unlock
  49 #else
  50 #define PTHREAD_MUTEX_LOCK(_x)
  51 #define PTHREAD_MUTEX_UNLOCK(_x)
  52 #endif
  53
  54
  55 /* record */
  56 static void             record_init(record_t *buf);
  57 static void             record_close(record_t *buf);
  58 static unsigned int     record_plus(record_t *buf, const void *ptr,
  59                                     unsigned int size);
  60 static unsigned int     record_minus(record_t *buf, void *ptr,
  61                                      unsigned int size);
  62
  63 tls_session_t *tls_new_client_session(fr_tls_server_conf_t *conf, int fd)
  64 {
  65         int verify_mode;
  66         tls_session_t *ssn = NULL;
  67
  68         ssn = (tls_session_t *) malloc(sizeof(*ssn));
  69         memset(ssn, 0, sizeof(*ssn));
  70
  71         ssn->ctx = conf->ctx;
  72         ssn->ssl = SSL_new(ssn->ctx);
  73         rad_assert(ssn->ssl != NULL);
  74
  75         /*
  76          *      Add the message callback to identify what type of
  77          *      message/handshake is passed
  78          */
  79         SSL_set_msg_callback(ssn->ssl, cbtls_msg);
  80         SSL_set_msg_callback_arg(ssn->ssl, ssn);
  81         SSL_set_info_callback(ssn->ssl, cbtls_info);
  82
  83         /*
  84          *      Always verify the peer certificate.
  85          */
  86         DEBUG2("Requiring Server certificate");
  87         verify_mode = SSL_VERIFY_PEER;
  88         verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
  89         SSL_set_verify(ssn->ssl, verify_mode, cbtls_verify);
  90
  91         SSL_set_ex_data(ssn->ssl, FR_TLS_EX_INDEX_CONF, (void *)conf);
  92         SSL_set_fd(ssn->ssl, fd);
  93         if (SSL_connect(ssn->ssl) <= 0) {
  94                 int err;
  95                 while ((err = ERR_get_error())) {
  96                         DEBUG("OpenSSL Err says %s",
  97                               ERR_error_string(err, NULL));
  98                 }
  99                 free(ssn);
 100                 return NULL;
 101         }
 102
 103         return ssn;
 104 }
 105
 106 tls_session_t *tls_new_session(fr_tls_server_conf_t *conf, REQUEST *request,
 107                                int client_cert)
 108 {
 109         tls_session_t *state = NULL;
 110         SSL *new_tls = NULL;
 111         int             verify_mode = 0;
 112         VALUE_PAIR      *vp;
 113
 114         /*
 115          *      Manually flush the sessions every so often.  If HALF
 116          *      of the session lifetime has passed since we last
 117          *      flushed, then flush it again.
 118          *
 119          *      FIXME: Also do it every N sessions?
 120          */
 121         if (conf->session_cache_enable &&
 122             ((conf->session_last_flushed + (conf->session_timeout * 1800)) <= request->timestamp)){
 123                 RDEBUG2("Flushing SSL sessions (of #%ld)",
 124                         SSL_CTX_sess_number(conf->ctx));
 125
 126                 SSL_CTX_flush_sessions(conf->ctx, request->timestamp);
 127                 conf->session_last_flushed = request->timestamp;
 128         }
 129
 130         if ((new_tls = SSL_new(conf->ctx)) == NULL) {
 131                 radlog(L_ERR, "SSL: Error creating new SSL: %s",
 132                        ERR_error_string(ERR_get_error(), NULL));
 133                 return NULL;
 134         }
 135
 136         /* We use the SSL's "app_data" to indicate a call-back */
 137         SSL_set_app_data(new_tls, NULL);
 138
 139         state = (tls_session_t *)malloc(sizeof(*state));
 140         memset(state, 0, sizeof(*state));
 141         session_init(state);
 142
 143         state->ctx = conf->ctx;
 144         state->ssl = new_tls;
 145
 146         /*
 147          *      Initialize callbacks
 148          */
 149         state->record_init = record_init;
 150         state->record_close = record_close;
 151         state->record_plus = record_plus;
 152         state->record_minus = record_minus;
 153
 154         /*
 155          *      Create & hook the BIOs to handle the dirty side of the
 156          *      SSL.  This is *very important* as we want to handle
 157          *      the transmission part.  Now the only IO interface
 158          *      that SSL is aware of, is our defined BIO buffers.
 159          *
 160          *      This means that all SSL IO is done to/from memory,
 161          *      and we can update those BIOs from the packets we've
 162          *      received.
 163          */
 164         state->into_ssl = BIO_new(BIO_s_mem());
 165         state->from_ssl = BIO_new(BIO_s_mem());
 166         SSL_set_bio(state->ssl, state->into_ssl, state->from_ssl);
 167
 168         /*
 169          *      Add the message callback to identify what type of
 170          *      message/handshake is passed
 171          */
 172         SSL_set_msg_callback(new_tls, cbtls_msg);
 173         SSL_set_msg_callback_arg(new_tls, state);
 174         SSL_set_info_callback(new_tls, cbtls_info);
 175
 176         /*
 177          *      In Server mode we only accept.
 178          */
 179         SSL_set_accept_state(state->ssl);
 180
 181         /*
 182          *      Verify the peer certificate, if asked.
 183          */
 184         if (client_cert) {
 185                 RDEBUG2("Requiring client certificate");
 186                 verify_mode = SSL_VERIFY_PEER;
 187                 verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
 188                 verify_mode |= SSL_VERIFY_CLIENT_ONCE;
 189         }
 190         SSL_set_verify(state->ssl, verify_mode, cbtls_verify);
 191
 192         SSL_set_ex_data(state->ssl, FR_TLS_EX_INDEX_CONF, (void *)conf);
 193         state->length_flag = conf->include_length;
 194
 195         /*
 196          *      We use default fragment size, unless the Framed-MTU
 197          *      tells us it's too big.  Note that we do NOT account
 198          *      for the EAP-TLS headers if conf->fragment_size is
 199          *      large, because that config item looks to be confusing.
 200          *
 201          *      i.e. it should REALLY be called MTU, and the code here
 202          *      should figure out what that means for TLS fragment size.
 203          *      asking the administrator to know the internal details
 204          *      of EAP-TLS in order to calculate fragment sizes is
 205          *      just too much.
 206          */
 207         state->offset = conf->fragment_size;
 208         vp = pairfind(request->packet->vps, PW_FRAMED_MTU, 0);
 209         if (vp && (vp->vp_integer > 100) && (vp->vp_integer < state->offset)) {
 210                 state->offset = vp->vp_integer;
 211         }
 212
 213         if (conf->session_cache_enable) {
 214                 state->allow_session_resumption = 1; /* otherwise it's zero */
 215         }
 216
 217         RDEBUG2("Initiate");
 218
 219         return state;
 220 }
 221
 222 /*
 223  *      Print out some text describing the error.
 224  */
 225 static int int_ssl_check(REQUEST *request, SSL *s, int ret, const char *text)
 226 {
 227         int e;
 228         unsigned long l;
 229
 230         if ((l = ERR_get_error()) != 0) {
 231                 const char *p = ERR_error_string(l, NULL);
 232                 VALUE_PAIR *vp;
 233
 234                 radlog(L_ERR, "SSL error %s", p);
 235
 236                 if (request) {
 237                         vp = pairmake("Module-Failure-Message", p, T_OP_ADD);
 238                         if (vp) pairadd(&request->packet->vps, vp);
 239                 }
 240         }
 241         e = SSL_get_error(s, ret);
 242
 243         switch(e) {
 244                 /*
 245                  *      These seem to be harmless and already "dealt
 246                  *      with" by our non-blocking environment. NB:
 247                  *      "ZERO_RETURN" is the clean "error"
 248                  *      indicating a successfully closed SSL
 249                  *      tunnel. We let this happen because our IO
 250                  *      loop should not appear to have broken on
 251                  *      this condition - and outside the IO loop, the
 252                  *      "shutdown" state is checked.
 253                  *
 254                  *      Don't print anything if we ignore the error.
 255                  */
 256         case SSL_ERROR_NONE:
 257         case SSL_ERROR_WANT_READ:
 258         case SSL_ERROR_WANT_WRITE:
 259         case SSL_ERROR_WANT_X509_LOOKUP:
 260         case SSL_ERROR_ZERO_RETURN:
 261                 break;
 262
 263                 /*
 264                  *      These seem to be indications of a genuine
 265                  *      error that should result in the SSL tunnel
 266                  *      being regarded as "dead".
 267                  */
 268         case SSL_ERROR_SYSCALL:
 269                 radlog(L_ERR, "SSL: %s failed in a system call (%d), TLS session fails.",
 270                        text, ret);
 271                 return 0;
 272
 273         case SSL_ERROR_SSL:
 274                 radlog(L_ERR, "SSL: %s failed inside of TLS (%d), TLS session fails.",
 275                        text, ret);
 276                 return 0;
 277
 278         default:
 279                 /*
 280                  *      For any other errors that (a) exist, and (b)
 281                  *      crop up - we need to interpret what to do with
 282                  *      them - so "politely inform" the caller that
 283                  *      the code needs updating here.
 284                  */
 285                 radlog(L_ERR, "SSL: FATAL SSL error ..... %d\n", e);
 286                 return 0;
 287         }
 288
 289         return 1;
 290 }
 291
 292 /*
 293  * We are the server, we always get the dirty data
 294  * (Handshake data is also considered as dirty data)
 295  * During handshake, since SSL API handles itself,
 296  * After clean-up, dirty_out will be filled with
 297  * the data required for handshaking. So we check
 298  * if dirty_out is empty then we simply send it back.
 299  * As of now, if handshake is successful, then we keep going,
 300  * otherwise we fail.
 301  *
 302  * Fill the Bio with the dirty data to clean it
 303  * Get the cleaned data from SSL, if it is not Handshake data
 304  */
 305 int tls_handshake_recv(REQUEST *request, tls_session_t *ssn)
 306 {
 307         int err;
 308
 309         err = BIO_write(ssn->into_ssl, ssn->dirty_in.data, ssn->dirty_in.used);
 310         if (err != (int) ssn->dirty_in.used) {
 311                 RDEBUG("Failed writing %d to SSL BIO: %d", ssn->dirty_in.used,
 312                         err);
 313                 record_init(&ssn->dirty_in);
 314                 return 0;
 315         }
 316         record_init(&ssn->dirty_in);
 317
 318         err = SSL_read(ssn->ssl, ssn->clean_out.data + ssn->clean_out.used,
 319                        sizeof(ssn->clean_out.data) - ssn->clean_out.used);
 320         if (err > 0) {
 321                 ssn->clean_out.used += err;
 322                 return 1;
 323         }
 324
 325         if (!int_ssl_check(request, ssn->ssl, err, "SSL_read")) {
 326                 return 0;
 327         }
 328
 329         /* Some Extra STATE information for easy debugging */
 330         if (SSL_is_init_finished(ssn->ssl)) {
 331                 DEBUG2("SSL Connection Established\n");
 332         }
 333         if (SSL_in_init(ssn->ssl)) {
 334                 DEBUG2("In SSL Handshake Phase\n");
 335         }
 336         if (SSL_in_before(ssn->ssl)) {
 337                 DEBUG2("Before SSL Handshake Phase\n");
 338         }
 339         if (SSL_in_accept_init(ssn->ssl)) {
 340                 DEBUG2("In SSL Accept mode \n");
 341         }
 342         if (SSL_in_connect_init(ssn->ssl)) {
 343                 DEBUG2("In SSL Connect mode \n");
 344         }
 345
 346         err = BIO_ctrl_pending(ssn->from_ssl);
 347         if (err > 0) {
 348                 err = BIO_read(ssn->from_ssl, ssn->dirty_out.data,
 349                                sizeof(ssn->dirty_out.data));
 350                 if (err > 0) {
 351                         ssn->dirty_out.used = err;
 352
 353                 } else if (BIO_should_retry(ssn->from_ssl)) {
 354                         record_init(&ssn->dirty_in);
 355                         DEBUG2("  tls: Asking for more data in tunnel");
 356                         return 1;
 357
 358                 } else {
 359                         int_ssl_check(request, ssn->ssl, err, "BIO_read");
 360                         record_init(&ssn->dirty_in);
 361                         return 0;
 362                 }
 363         } else {
 364                 DEBUG2("SSL Application Data");
 365                 /* Its clean application data, do whatever we want */
 366                 record_init(&ssn->clean_out);
 367         }
 368
 369         /* We are done with dirty_in, reinitialize it */
 370         record_init(&ssn->dirty_in);
 371         return 1;
 372 }
 373
 374 /*
 375  *      Take clear-text user data, and encrypt it into the output buffer,
 376  *      to send to the client at the other end of the SSL connection.
 377  */
 378 int tls_handshake_send(REQUEST *request, tls_session_t *ssn)
 379 {
 380         int err;
 381
 382         /*
 383          *      If there's un-encrypted data in 'clean_in', then write
 384          *      that data to the SSL session, and then call the BIO function
 385          *      to get that encrypted data from the SSL session, into
 386          *      a buffer which we can then package into an EAP packet.
 387          *
 388          *      Based on Server's logic this clean_in is expected to
 389          *      contain the data to send to the client.
 390          */
 391         if (ssn->clean_in.used > 0) {
 392                 int written;
 393
 394                 written = SSL_write(ssn->ssl, ssn->clean_in.data, ssn->clean_in.used);
 395                 record_minus(&ssn->clean_in, NULL, written);
 396
 397                 /* Get the dirty data from Bio to send it */
 398                 err = BIO_read(ssn->from_ssl, ssn->dirty_out.data,
 399                                sizeof(ssn->dirty_out.data));
 400                 if (err > 0) {
 401                         ssn->dirty_out.used = err;
 402                 } else {
 403                         int_ssl_check(request, ssn->ssl, err, "handshake_send");
 404                 }
 405         }
 406
 407         return 1;
 408 }
 409
 410 void session_init(tls_session_t *ssn)
 411 {
 412         ssn->ssl = NULL;
 413         ssn->into_ssl = ssn->from_ssl = NULL;
 414         record_init(&ssn->clean_in);
 415         record_init(&ssn->clean_out);
 416         record_init(&ssn->dirty_in);
 417         record_init(&ssn->dirty_out);
 418
 419         memset(&ssn->info, 0, sizeof(ssn->info));
 420
 421         ssn->offset = 0;
 422         ssn->fragment = 0;
 423         ssn->tls_msg_len = 0;
 424         ssn->length_flag = 0;
 425         ssn->opaque = NULL;
 426         ssn->free_opaque = NULL;
 427 }
 428
 429 void session_close(tls_session_t *ssn)
 430 {
 431         if (ssn->ssl->session) {
 432                 VALUE_PAIR *vp;
 433
 434                 vp = SSL_SESSION_get_ex_data(ssn->ssl->session,
 435                                              FR_TLS_EX_INDEX_VPS);
 436                 if (vp) pairfree(&vp);
 437         }
 438
 439         SSL_set_quiet_shutdown(ssn->ssl, 1);
 440         SSL_shutdown(ssn->ssl);
 441
 442         if(ssn->ssl)
 443                 SSL_free(ssn->ssl);
 444 #if 0
 445 /*
 446  * WARNING: SSL_free seems to decrement the reference counts already,
 447  *      so doing this might crash the application.
 448  */
 449         if(ssn->into_ssl)
 450                 BIO_free(ssn->into_ssl);
 451         if(ssn->from_ssl)
 452                 BIO_free(ssn->from_ssl);
 453 #endif
 454         record_close(&ssn->clean_in);
 455         record_close(&ssn->clean_out);
 456         record_close(&ssn->dirty_in);
 457         record_close(&ssn->dirty_out);
 458         session_init(ssn);
 459 }
 460
 461 void session_free(void *ssn)
 462 {
 463         tls_session_t *sess = (tls_session_t *)ssn;
 464
 465         if (!ssn) return;
 466
 467         /*
 468          *      Free any opaque TTLS or PEAP data.
 469          */
 470         if ((sess->opaque) && (sess->free_opaque)) {
 471                 sess->free_opaque(sess->opaque);
 472                 sess->opaque = NULL;
 473         }
 474
 475         session_close(sess);
 476
 477         free(sess);
 478 }
 479
 480 static void record_init(record_t *rec)
 481 {
 482         rec->used = 0;
 483 }
 484
 485 static void record_close(record_t *rec)
 486 {
 487         rec->used = 0;
 488 }
 489
 490
 491 /*
 492  *      Copy data to the intermediate buffer, before we send
 493  *      it somewhere.
 494  */
 495 static unsigned int record_plus(record_t *rec, const void *ptr,
 496                                 unsigned int size)
 497 {
 498         unsigned int added = MAX_RECORD_SIZE - rec->used;
 499
 500         if(added > size)
 501                 added = size;
 502         if(added == 0)
 503                 return 0;
 504         memcpy(rec->data + rec->used, ptr, added);
 505         rec->used += added;
 506         return added;
 507 }
 508
 509 /*
 510  *      Take data from the buffer, and give it to the caller.
 511  */
 512 static unsigned int record_minus(record_t *rec, void *ptr,
 513                                  unsigned int size)
 514 {
 515         unsigned int taken = rec->used;
 516
 517         if(taken > size)
 518                 taken = size;
 519         if(taken == 0)
 520                 return 0;
 521         if(ptr)
 522                 memcpy(ptr, rec->data, taken);
 523         rec->used -= taken;
 524
 525         /*
 526          *      This is pretty bad...
 527          */
 528         if(rec->used > 0)
 529                 memmove(rec->data, rec->data + taken, rec->used);
 530         return taken;
 531 }
 532
 533 void tls_session_information(tls_session_t *tls_session)
 534 {
 535         const char *str_write_p, *str_version, *str_content_type = "";
 536         const char *str_details1 = "", *str_details2= "";
 537         REQUEST *request;
 538
 539         /*
 540          *      Don't print this out in the normal course of
 541          *      operations.
 542          */
 543         if (debug_flag == 0) {
 544                 return;
 545         }
 546
 547         str_write_p = tls_session->info.origin ? ">>>" : "<<<";
 548
 549         switch (tls_session->info.version)
 550         {
 551         case SSL2_VERSION:
 552                 str_version = "SSL 2.0";
 553                 break;
 554         case SSL3_VERSION:
 555                 str_version = "SSL 3.0 ";
 556                 break;
 557         case TLS1_VERSION:
 558                 str_version = "TLS 1.0 ";
 559                 break;
 560         default:
 561                 str_version = "Unknown TLS version";
 562                 break;
 563         }
 564
 565         if (tls_session->info.version == SSL3_VERSION ||
 566             tls_session->info.version == TLS1_VERSION) {
 567                 switch (tls_session->info.content_type) {
 568                 case SSL3_RT_CHANGE_CIPHER_SPEC:
 569                         str_content_type = "ChangeCipherSpec";
 570                         break;
 571                 case SSL3_RT_ALERT:
 572                         str_content_type = "Alert";
 573                         break;
 574                 case SSL3_RT_HANDSHAKE:
 575                         str_content_type = "Handshake";
 576                         break;
 577                 case SSL3_RT_APPLICATION_DATA:
 578                         str_content_type = "ApplicationData";
 579                         break;
 580                 default:
 581                         str_content_type = "UnknownContentType";
 582                         break;
 583                 }
 584
 585                 if (tls_session->info.content_type == SSL3_RT_ALERT) {
 586                         str_details1 = ", ???";
 587
 588                         if (tls_session->info.record_len == 2) {
 589
 590                                 switch (tls_session->info.alert_level) {
 591                                 case SSL3_AL_WARNING:
 592                                         str_details1 = ", warning";
 593                                         break;
 594                                 case SSL3_AL_FATAL:
 595                                         str_details1 = ", fatal";
 596                                         break;
 597                                 }
 598
 599                                 str_details2 = " ???";
 600                                 switch (tls_session->info.alert_description) {
 601                                 case SSL3_AD_CLOSE_NOTIFY:
 602                                         str_details2 = " close_notify";
 603                                         break;
 604                                 case SSL3_AD_UNEXPECTED_MESSAGE:
 605                                         str_details2 = " unexpected_message";
 606                                         break;
 607                                 case SSL3_AD_BAD_RECORD_MAC:
 608                                         str_details2 = " bad_record_mac";
 609                                         break;
 610                                 case TLS1_AD_DECRYPTION_FAILED:
 611                                         str_details2 = " decryption_failed";
 612                                         break;
 613                                 case TLS1_AD_RECORD_OVERFLOW:
 614                                         str_details2 = " record_overflow";
 615                                         break;
 616                                 case SSL3_AD_DECOMPRESSION_FAILURE:
 617                                         str_details2 = " decompression_failure";
 618                                         break;
 619                                 case SSL3_AD_HANDSHAKE_FAILURE:
 620                                         str_details2 = " handshake_failure";
 621                                         break;
 622                                 case SSL3_AD_BAD_CERTIFICATE:
 623                                         str_details2 = " bad_certificate";
 624                                         break;
 625                                 case SSL3_AD_UNSUPPORTED_CERTIFICATE:
 626                                         str_details2 = " unsupported_certificate";
 627                                         break;
 628                                 case SSL3_AD_CERTIFICATE_REVOKED:
 629                                         str_details2 = " certificate_revoked";
 630                                         break;
 631                                 case SSL3_AD_CERTIFICATE_EXPIRED:
 632                                         str_details2 = " certificate_expired";
 633                                         break;
 634                                 case SSL3_AD_CERTIFICATE_UNKNOWN:
 635                                         str_details2 = " certificate_unknown";
 636                                         break;
 637                                 case SSL3_AD_ILLEGAL_PARAMETER:
 638                                         str_details2 = " illegal_parameter";
 639                                         break;
 640                                 case TLS1_AD_UNKNOWN_CA:
 641                                         str_details2 = " unknown_ca";
 642                                         break;
 643                                 case TLS1_AD_ACCESS_DENIED:
 644                                         str_details2 = " access_denied";
 645                                         break;
 646                                 case TLS1_AD_DECODE_ERROR:
 647                                         str_details2 = " decode_error";
 648                                         break;
 649                                 case TLS1_AD_DECRYPT_ERROR:
 650                                         str_details2 = " decrypt_error";
 651                                         break;
 652                                 case TLS1_AD_EXPORT_RESTRICTION:
 653                                         str_details2 = " export_restriction";
 654                                         break;
 655                                 case TLS1_AD_PROTOCOL_VERSION:
 656                                         str_details2 = " protocol_version";
 657                                         break;
 658                                 case TLS1_AD_INSUFFICIENT_SECURITY:
 659                                         str_details2 = " insufficient_security";
 660                                         break;
 661                                 case TLS1_AD_INTERNAL_ERROR:
 662                                         str_details2 = " internal_error";
 663                                         break;
 664                                 case TLS1_AD_USER_CANCELLED:
 665                                         str_details2 = " user_canceled";
 666                                         break;
 667                                 case TLS1_AD_NO_RENEGOTIATION:
 668                                         str_details2 = " no_renegotiation";
 669                                         break;
 670                                 }
 671                         }
 672                 }
 673
 674                 if (tls_session->info.content_type == SSL3_RT_HANDSHAKE) {
 675                         str_details1 = "???";
 676
 677                         if (tls_session->info.record_len > 0)
 678                         switch (tls_session->info.handshake_type)
 679                         {
 680                         case SSL3_MT_HELLO_REQUEST:
 681                                 str_details1 = ", HelloRequest";
 682                                 break;
 683                         case SSL3_MT_CLIENT_HELLO:
 684                                 str_details1 = ", ClientHello";
 685                                 break;
 686                         case SSL3_MT_SERVER_HELLO:
 687                                 str_details1 = ", ServerHello";
 688                                 break;
 689                         case SSL3_MT_CERTIFICATE:
 690                                 str_details1 = ", Certificate";
 691                                 break;
 692                         case SSL3_MT_SERVER_KEY_EXCHANGE:
 693                                 str_details1 = ", ServerKeyExchange";
 694                                 break;
 695                         case SSL3_MT_CERTIFICATE_REQUEST:
 696                                 str_details1 = ", CertificateRequest";
 697                                 break;
 698                         case SSL3_MT_SERVER_DONE:
 699                                 str_details1 = ", ServerHelloDone";
 700                                 break;
 701                         case SSL3_MT_CERTIFICATE_VERIFY:
 702                                 str_details1 = ", CertificateVerify";
 703                                 break;
 704                         case SSL3_MT_CLIENT_KEY_EXCHANGE:
 705                                 str_details1 = ", ClientKeyExchange";
 706                                 break;
 707                         case SSL3_MT_FINISHED:
 708                                 str_details1 = ", Finished";
 709                                 break;
 710                         }
 711                 }
 712         }
 713
 714         snprintf(tls_session->info.info_description,
 715                  sizeof(tls_session->info.info_description),
 716                  "%s %s%s [length %04lx]%s%s\n",
 717                  str_write_p, str_version, str_content_type,
 718                  (unsigned long)tls_session->info.record_len,
 719                  str_details1, str_details2);
 720
 721         request = SSL_get_ex_data(tls_session->ssl, FR_TLS_EX_INDEX_REQUEST);
 722
 723         RDEBUG2("%s\n", tls_session->info.info_description);
 724 }
 725
 726 static CONF_PARSER cache_config[] = {
 727         { "enable", PW_TYPE_BOOLEAN,
 728           offsetof(fr_tls_server_conf_t, session_cache_enable), NULL, "no" },
 729         { "lifetime", PW_TYPE_INTEGER,
 730           offsetof(fr_tls_server_conf_t, session_timeout), NULL, "24" },
 731         { "max_entries", PW_TYPE_INTEGER,
 732           offsetof(fr_tls_server_conf_t, session_cache_size), NULL, "255" },
 733         { "name", PW_TYPE_STRING_PTR,
 734           offsetof(fr_tls_server_conf_t, session_id_name), NULL, NULL},
 735         { NULL, -1, 0, NULL, NULL }           /* end the list */
 736 };
 737
 738 static CONF_PARSER verify_config[] = {
 739         { "tmpdir", PW_TYPE_STRING_PTR,
 740           offsetof(fr_tls_server_conf_t, verify_tmp_dir), NULL, NULL},
 741         { "client", PW_TYPE_STRING_PTR,
 742           offsetof(fr_tls_server_conf_t, verify_client_cert_cmd), NULL, NULL},
 743         { NULL, -1, 0, NULL, NULL }           /* end the list */
 744 };
 745
 746 #ifdef HAVE_OPENSSL_OCSP_H
 747 static CONF_PARSER ocsp_config[] = {
 748         { "enable", PW_TYPE_BOOLEAN,
 749           offsetof(fr_tls_server_conf_t, ocsp_enable), NULL, "no"},
 750         { "override_cert_url", PW_TYPE_BOOLEAN,
 751           offsetof(fr_tls_server_conf_t, ocsp_override_url), NULL, "no"},
 752         { "url", PW_TYPE_STRING_PTR,
 753           offsetof(fr_tls_server_conf_t, ocsp_url), NULL, NULL },
 754         { NULL, -1, 0, NULL, NULL }           /* end the list */
 755 };
 756 #endif
 757
 758 static CONF_PARSER tls_server_config[] = {
 759         { "rsa_key_exchange", PW_TYPE_BOOLEAN,
 760           offsetof(fr_tls_server_conf_t, rsa_key), NULL, "no" },
 761         { "dh_key_exchange", PW_TYPE_BOOLEAN,
 762           offsetof(fr_tls_server_conf_t, dh_key), NULL, "yes" },
 763         { "rsa_key_length", PW_TYPE_INTEGER,
 764           offsetof(fr_tls_server_conf_t, rsa_key_length), NULL, "512" },
 765         { "dh_key_length", PW_TYPE_INTEGER,
 766           offsetof(fr_tls_server_conf_t, dh_key_length), NULL, "512" },
 767         { "verify_depth", PW_TYPE_INTEGER,
 768           offsetof(fr_tls_server_conf_t, verify_depth), NULL, "0" },
 769         { "CA_path", PW_TYPE_FILENAME,
 770           offsetof(fr_tls_server_conf_t, ca_path), NULL, NULL },
 771         { "pem_file_type", PW_TYPE_BOOLEAN,
 772           offsetof(fr_tls_server_conf_t, file_type), NULL, "yes" },
 773         { "private_key_file", PW_TYPE_FILENAME,
 774           offsetof(fr_tls_server_conf_t, private_key_file), NULL, NULL },
 775         { "certificate_file", PW_TYPE_FILENAME,
 776           offsetof(fr_tls_server_conf_t, certificate_file), NULL, NULL },
 777         { "CA_file", PW_TYPE_FILENAME,
 778           offsetof(fr_tls_server_conf_t, ca_file), NULL, NULL },
 779         { "private_key_password", PW_TYPE_STRING_PTR,
 780           offsetof(fr_tls_server_conf_t, private_key_password), NULL, NULL },
 781         { "dh_file", PW_TYPE_STRING_PTR,
 782           offsetof(fr_tls_server_conf_t, dh_file), NULL, NULL },
 783         { "random_file", PW_TYPE_STRING_PTR,
 784           offsetof(fr_tls_server_conf_t, random_file), NULL, NULL },
 785         { "fragment_size", PW_TYPE_INTEGER,
 786           offsetof(fr_tls_server_conf_t, fragment_size), NULL, "1024" },
 787         { "include_length", PW_TYPE_BOOLEAN,
 788           offsetof(fr_tls_server_conf_t, include_length), NULL, "yes" },
 789         { "check_crl", PW_TYPE_BOOLEAN,
 790           offsetof(fr_tls_server_conf_t, check_crl), NULL, "no"},
 791         { "allow_expired_crl", PW_TYPE_BOOLEAN,
 792           offsetof(fr_tls_server_conf_t, allow_expired_crl), NULL, NULL},
 793         { "check_cert_cn", PW_TYPE_STRING_PTR,
 794           offsetof(fr_tls_server_conf_t, check_cert_cn), NULL, NULL},
 795         { "cipher_list", PW_TYPE_STRING_PTR,
 796           offsetof(fr_tls_server_conf_t, cipher_list), NULL, NULL},
 797         { "check_cert_issuer", PW_TYPE_STRING_PTR,
 798           offsetof(fr_tls_server_conf_t, check_cert_issuer), NULL, NULL},
 799         { "make_cert_command", PW_TYPE_STRING_PTR,
 800           offsetof(fr_tls_server_conf_t, make_cert_command), NULL, NULL},
 801         { "require_client_cert", PW_TYPE_BOOLEAN,
 802           offsetof(fr_tls_server_conf_t, require_client_cert), NULL, NULL },
 803
 804         { "cache", PW_TYPE_SUBSECTION, 0, NULL, (const void *) cache_config },
 805
 806         { "verify", PW_TYPE_SUBSECTION, 0, NULL, (const void *) verify_config },
 807
 808 #ifdef HAVE_OPENSSL_OCSP_H
 809         { "ocsp", PW_TYPE_SUBSECTION, 0, NULL, (const void *) ocsp_config },
 810 #endif
 811
 812         { NULL, -1, 0, NULL, NULL }           /* end the list */
 813 };
 814
 815
 816 static CONF_PARSER tls_client_config[] = {
 817         { "rsa_key_exchange", PW_TYPE_BOOLEAN,
 818           offsetof(fr_tls_server_conf_t, rsa_key), NULL, "no" },
 819         { "dh_key_exchange", PW_TYPE_BOOLEAN,
 820           offsetof(fr_tls_server_conf_t, dh_key), NULL, "yes" },
 821         { "rsa_key_length", PW_TYPE_INTEGER,
 822           offsetof(fr_tls_server_conf_t, rsa_key_length), NULL, "512" },
 823         { "dh_key_length", PW_TYPE_INTEGER,
 824           offsetof(fr_tls_server_conf_t, dh_key_length), NULL, "512" },
 825         { "verify_depth", PW_TYPE_INTEGER,
 826           offsetof(fr_tls_server_conf_t, verify_depth), NULL, "0" },
 827         { "CA_path", PW_TYPE_FILENAME,
 828           offsetof(fr_tls_server_conf_t, ca_path), NULL, NULL },
 829         { "pem_file_type", PW_TYPE_BOOLEAN,
 830           offsetof(fr_tls_server_conf_t, file_type), NULL, "yes" },
 831         { "private_key_file", PW_TYPE_FILENAME,
 832           offsetof(fr_tls_server_conf_t, private_key_file), NULL, NULL },
 833         { "certificate_file", PW_TYPE_FILENAME,
 834           offsetof(fr_tls_server_conf_t, certificate_file), NULL, NULL },
 835         { "CA_file", PW_TYPE_FILENAME,
 836           offsetof(fr_tls_server_conf_t, ca_file), NULL, NULL },
 837         { "private_key_password", PW_TYPE_STRING_PTR,
 838           offsetof(fr_tls_server_conf_t, private_key_password), NULL, NULL },
 839         { "dh_file", PW_TYPE_STRING_PTR,
 840           offsetof(fr_tls_server_conf_t, dh_file), NULL, NULL },
 841         { "random_file", PW_TYPE_STRING_PTR,
 842           offsetof(fr_tls_server_conf_t, random_file), NULL, NULL },
 843         { "fragment_size", PW_TYPE_INTEGER,
 844           offsetof(fr_tls_server_conf_t, fragment_size), NULL, "1024" },
 845         { "include_length", PW_TYPE_BOOLEAN,
 846           offsetof(fr_tls_server_conf_t, include_length), NULL, "yes" },
 847         { "check_crl", PW_TYPE_BOOLEAN,
 848           offsetof(fr_tls_server_conf_t, check_crl), NULL, "no"},
 849         { "check_cert_cn", PW_TYPE_STRING_PTR,
 850           offsetof(fr_tls_server_conf_t, check_cert_cn), NULL, NULL},
 851         { "cipher_list", PW_TYPE_STRING_PTR,
 852           offsetof(fr_tls_server_conf_t, cipher_list), NULL, NULL},
 853         { "check_cert_issuer", PW_TYPE_STRING_PTR,
 854           offsetof(fr_tls_server_conf_t, check_cert_issuer), NULL, NULL},
 855
 856         { NULL, -1, 0, NULL, NULL }           /* end the list */
 857 };
 858
 859
 860 /*
 861  *      TODO: Check for the type of key exchange * like conf->dh_key
 862  */
 863 static int load_dh_params(SSL_CTX *ctx, char *file)
 864 {
 865         DH *dh = NULL;
 866         BIO *bio;
 867
 868         if ((bio = BIO_new_file(file, "r")) == NULL) {
 869                 radlog(L_ERR, "rlm_eap_tls: Unable to open DH file - %s", file);
 870                 return -1;
 871         }
 872
 873         dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
 874         BIO_free(bio);
 875         if (!dh) {
 876                 DEBUG2("WARNING: rlm_eap_tls: Unable to set DH parameters.  DH cipher suites may not work!");
 877                 DEBUG2("WARNING: Fix this by running the OpenSSL command listed in eap.conf");
 878                 return 0;
 879         }
 880
 881         if (SSL_CTX_set_tmp_dh(ctx, dh) < 0) {
 882                 radlog(L_ERR, "rlm_eap_tls: Unable to set DH parameters");
 883                 DH_free(dh);
 884                 return -1;
 885         }
 886
 887         DH_free(dh);
 888         return 0;
 889 }
 890
 891
 892 /*
 893  *      Generate ephemeral RSA keys.
 894  */
 895 static int generate_eph_rsa_key(SSL_CTX *ctx)
 896 {
 897         RSA *rsa;
 898
 899         rsa = RSA_generate_key(512, RSA_F4, NULL, NULL);
 900
 901         if (!SSL_CTX_set_tmp_rsa(ctx, rsa)) {
 902                 radlog(L_ERR, "rlm_eap_tls: Couldn't set ephemeral RSA key");
 903                 return -1;
 904         }
 905
 906         RSA_free(rsa);
 907         return 0;
 908 }
 909
 910
 911 /*
 912  *      These functions don't do anything other than print debugging
 913  *      messages.
 914  *
 915  *      FIXME: Write sessions to some long-term storage, so that
 916  *             session resumption can still occur after the server
 917  *             restarts.
 918  */
 919 #define MAX_SESSION_SIZE (256)
 920
 921 static void cbtls_remove_session(UNUSED SSL_CTX *ctx, SSL_SESSION *sess)
 922 {
 923         size_t size;
 924         char buffer[2 * MAX_SESSION_SIZE + 1];
 925
 926         size = sess->session_id_length;
 927         if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
 928
 929         fr_bin2hex(sess->session_id, buffer, size);
 930
 931         DEBUG2("  SSL: Removing session %s from the cache", buffer);
 932         SSL_SESSION_free(sess);
 933
 934         return;
 935 }
 936
 937 static int cbtls_new_session(UNUSED SSL *s, SSL_SESSION *sess)
 938 {
 939         size_t size;
 940         char buffer[2 * MAX_SESSION_SIZE + 1];
 941
 942         size = sess->session_id_length;
 943         if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
 944
 945         fr_bin2hex(sess->session_id, buffer, size);
 946
 947         DEBUG2("  SSL: adding session %s to cache", buffer);
 948
 949         return 1;
 950 }
 951
 952 static SSL_SESSION *cbtls_get_session(UNUSED SSL *s,
 953                                       unsigned char *data, int len,
 954                                       UNUSED int *copy)
 955 {
 956         size_t size;
 957         char buffer[2 * MAX_SESSION_SIZE + 1];
 958
 959         size = len;
 960         if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
 961
 962         fr_bin2hex(data, buffer, size);
 963
 964         DEBUG2("  SSL: Client requested nonexistent cached session %s",
 965                buffer);
 966
 967         return NULL;
 968 }
 969
 970 #ifdef HAVE_OPENSSL_OCSP_H
 971 /*
 972  * This function extracts the OCSP Responder URL
 973  * from an existing x509 certificate.
 974  */
 975 static int ocsp_parse_cert_url(X509 *cert, char **phost, char **pport,
 976                                char **ppath, int *pssl)
 977 {
 978         int i;
 979
 980         AUTHORITY_INFO_ACCESS *aia;
 981         ACCESS_DESCRIPTION *ad;
 982
 983         aia = X509_get_ext_d2i(cert, NID_info_access, NULL, NULL);
 984
 985         for (i = 0; i < sk_ACCESS_DESCRIPTION_num(aia); i++) {
 986                 ad = sk_ACCESS_DESCRIPTION_value(aia, 0);
 987                 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
 988                         if (ad->location->type == GEN_URI) {
 989                                 if(OCSP_parse_url(ad->location->d.ia5->data,
 990                                         phost, pport, ppath, pssl))
 991                                         return 1;
 992                         }
 993                 }
 994         }
 995         return 0;
 996 }
 997
 998 /*
 999  * This function sends a OCSP request to a defined OCSP responder
1000  * and checks the OCSP response for correctness.
1001  */
1002 static int ocsp_check(X509_STORE *store, X509 *issuer_cert, X509 *client_cert,
1003                       fr_tls_server_conf_t *conf)
1004 {
1005         OCSP_CERTID *certid;
1006         OCSP_REQUEST *req;
1007         OCSP_RESPONSE *resp;
1008         OCSP_BASICRESP *bresp = NULL;
1009         char *host = NULL;
1010         char *port = NULL;
1011         char *path = NULL;
1012         int use_ssl = -1;
1013         BIO *cbio;
1014         int ocsp_ok;
1015         int status;
1016
1017         /*
1018          * Create OCSP Request
1019          */
1020         certid = OCSP_cert_to_id(NULL, client_cert, issuer_cert);
1021         req = OCSP_REQUEST_new();
1022         OCSP_request_add0_id(req, certid);
1023         OCSP_request_add1_nonce(req, NULL, 8);
1024
1025         /*
1026          * Send OCSP Request and get OCSP Response
1027          */
1028
1029         /* Get OCSP responder URL */
1030         if(conf->ocsp_override_url) {
1031                 OCSP_parse_url(conf->ocsp_url, &host, &port, &path, &use_ssl);
1032         }
1033         else {
1034                 ocsp_parse_cert_url(client_cert, &host, &port, &path, &use_ssl);
1035         }
1036
1037         DEBUG2("[ocsp] --> Responder URL = http://%s:%s%s", host, port, path);
1038
1039         /* Setup BIO socket to OCSP responder */
1040         cbio = BIO_new_connect(host);
1041         BIO_set_conn_port(cbio, port);
1042         BIO_do_connect(cbio);
1043
1044         /* Send OCSP request and wait for response */
1045         resp = OCSP_sendreq_bio(cbio, path, req);
1046         if(resp==0) {
1047                 radlog(L_ERR, "Error: Couldn't get OCSP response");
1048                 ocsp_ok = 0;
1049                 goto ocsp_end;
1050         }
1051
1052         /* Verify OCSP response */
1053         status = OCSP_response_status(resp);
1054         if(status != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
1055                 radlog(L_ERR, "Error: OCSP response status: %s", OCSP_response_status_str(status));
1056                 ocsp_ok = 0;
1057                 goto ocsp_end;
1058         }
1059         bresp = OCSP_response_get1_basic(resp);
1060         if(OCSP_check_nonce(req, bresp)!=1) {
1061                 radlog(L_ERR, "Error: OCSP response has wrong nonce value");
1062                 ocsp_ok = 0;
1063                 goto ocsp_end;
1064         }
1065         if(OCSP_basic_verify(bresp, NULL, store, 0)!=1){
1066                 radlog(L_ERR, "Error: Couldn't verify OCSP basic response");
1067                 ocsp_ok = 0;
1068                 goto ocsp_end;
1069         }
1070
1071         ocsp_ok = 1;
1072
1073 ocsp_end:
1074         /* Free OCSP Stuff */
1075         OCSP_REQUEST_free(req);
1076         OCSP_RESPONSE_free(resp);
1077         free(host);
1078         free(port);
1079         free(path);
1080         BIO_free_all(cbio);
1081         OCSP_BASICRESP_free(bresp);
1082
1083         if (ocsp_ok) {
1084                 DEBUG2("[ocsp] --> Certificate is valid!");
1085         } else {
1086                 DEBUG2("[ocsp] --> Certificate has been expired/revoked!");
1087         }
1088
1089         return ocsp_ok;
1090 }
1091 #endif  /* HAVE_OPENSSL_OCSP_H */
1092
1093 /*
1094  *      For creating certificate attributes.
1095  */
1096 static const char *cert_attr_names[5][2] = {
1097   { "TLS-Client-Cert-Serial",           "TLS-Cert-Serial" },
1098   { "TLS-Client-Cert-Expiration",       "TLS-Cert-Expiration" },
1099   { "TLS-Client-Cert-Subject",          "TLS-Cert-Subject" },
1100   { "TLS-Client-Cert-Issuer",           "TLS-Cert-Issuer" },
1101   { "TLS-Client-Cert-Common-Name",      "TLS-Cert-Common-Name" }
1102 };
1103
1104 #define FR_TLS_SERIAL           (0)
1105 #define FR_TLS_EXPIRATION       (1)
1106 #define FR_TLS_SUBJECT          (2)
1107 #define FR_TLS_ISSUER           (3)
1108 #define FR_TLS_CN               (4)
1109
1110 /*
1111  *      Before trusting a certificate, you must make sure that the
1112  *      certificate is 'valid'. There are several steps that your
1113  *      application can take in determining if a certificate is
1114  *      valid. Commonly used steps are:
1115  *
1116  *      1.Verifying the certificate's signature, and verifying that
1117  *      the certificate has been issued by a trusted Certificate
1118  *      Authority.
1119  *
1120  *      2.Verifying that the certificate is valid for the present date
1121  *      (i.e. it is being presented within its validity dates).
1122  *
1123  *      3.Verifying that the certificate has not been revoked by its
1124  *      issuing Certificate Authority, by checking with respect to a
1125  *      Certificate Revocation List (CRL).
1126  *
1127  *      4.Verifying that the credentials presented by the certificate
1128  *      fulfill additional requirements specific to the application,
1129  *      such as with respect to access control lists or with respect
1130  *      to OCSP (Online Certificate Status Processing).
1131  *
1132  *      NOTE: This callback will be called multiple times based on the
1133  *      depth of the root certificate chain
1134  */
1135 int cbtls_verify(int ok, X509_STORE_CTX *ctx)
1136 {
1137         char subject[1024]; /* Used for the subject name */
1138         char issuer[1024]; /* Used for the issuer name */
1139         char common_name[1024];
1140         char cn_str[1024];
1141         char buf[64];
1142         X509 *client_cert;
1143         SSL *ssl;
1144         int err, depth, lookup;
1145         fr_tls_server_conf_t *conf;
1146         int my_ok = ok;
1147         REQUEST *request;
1148         ASN1_INTEGER *sn = NULL;
1149         ASN1_TIME *asn_time = NULL;
1150         VALUE_PAIR **certs;
1151         char **identity;
1152 #ifdef HAVE_OPENSSL_OCSP_H
1153         X509_STORE *ocsp_store = NULL;
1154         X509 *issuer_cert;
1155 #endif
1156
1157         client_cert = X509_STORE_CTX_get_current_cert(ctx);
1158         err = X509_STORE_CTX_get_error(ctx);
1159         depth = X509_STORE_CTX_get_error_depth(ctx);
1160
1161         lookup = depth;
1162
1163         /*
1164          *      Log client/issuing cert.  If there's an error, log
1165          *      issuing cert.
1166          */
1167         if ((lookup > 1) && !my_ok) lookup = 1;
1168
1169         /*
1170          * Retrieve the pointer to the SSL of the connection currently treated
1171          * and the application specific data stored into the SSL object.
1172          */
1173         ssl = X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
1174         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_CONF);
1175         if (!conf) return 1;
1176
1177         request = (REQUEST *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_REQUEST);
1178
1179         if (!request) return 1; /* FIXME: outbound TLS */
1180
1181         rad_assert(request != NULL);
1182         certs = (VALUE_PAIR **)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_CERTS);
1183         rad_assert(certs != NULL);
1184         identity = (char **)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_IDENTITY);
1185 #ifdef HAVE_OPENSSL_OCSP_H
1186         ocsp_store = (X509_STORE *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_STORE);
1187 #endif
1188
1189
1190         /*
1191          *      Get the Serial Number
1192          */
1193         buf[0] = '\0';
1194         sn = X509_get_serialNumber(client_cert);
1195
1196         /*
1197          *      For this next bit, we create the attributes *only* if
1198          *      we're at the client or issuing certificate, AND we
1199          *      have a user identity.  i.e. we don't create the
1200          *      attributes for RadSec connections.
1201          */
1202         if (identity &&
1203             (lookup <= 1) && sn && ((size_t) sn->length < (sizeof(buf) / 2))) {
1204                 char *p = buf;
1205                 int i;
1206
1207                 for (i = 0; i < sn->length; i++) {
1208                         sprintf(p, "%02x", (unsigned int)sn->data[i]);
1209                         p += 2;
1210                 }
1211                 pairadd(certs,
1212                         pairmake(cert_attr_names[FR_TLS_SERIAL][lookup], buf, T_OP_SET));
1213         }
1214
1215
1216         /*
1217          *      Get the Expiration Date
1218          */
1219         buf[0] = '\0';
1220         asn_time = X509_get_notAfter(client_cert);
1221         if (identity && (lookup <= 1) && asn_time &&
1222             (asn_time->length < MAX_STRING_LEN)) {
1223                 memcpy(buf, (char*) asn_time->data, asn_time->length);
1224                 buf[asn_time->length] = '\0';
1225                 pairadd(certs,
1226                         pairmake(cert_attr_names[FR_TLS_EXPIRATION][lookup], buf, T_OP_SET));
1227         }
1228
1229         /*
1230          *      Get the Subject & Issuer
1231          */
1232         subject[0] = issuer[0] = '\0';
1233         X509_NAME_oneline(X509_get_subject_name(client_cert), subject,
1234                           sizeof(subject));
1235         subject[sizeof(subject) - 1] = '\0';
1236         if (identity && (lookup <= 1) && subject[0] &&
1237             (strlen(subject) < MAX_STRING_LEN)) {
1238                 pairadd(certs,
1239                         pairmake(cert_attr_names[FR_TLS_SUBJECT][lookup], subject, T_OP_SET));
1240         }
1241
1242         X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), issuer,
1243                           sizeof(issuer));
1244         issuer[sizeof(issuer) - 1] = '\0';
1245         if (identity && (lookup <= 1) && issuer[0] &&
1246             (strlen(issuer) < MAX_STRING_LEN)) {
1247                 pairadd(certs,
1248                         pairmake(cert_attr_names[FR_TLS_ISSUER][lookup], issuer, T_OP_SET));
1249         }
1250
1251         /*
1252          *      Get the Common Name
1253          */
1254         X509_NAME_get_text_by_NID(X509_get_subject_name(client_cert),
1255                                   NID_commonName, common_name, sizeof(common_name));
1256         common_name[sizeof(common_name) - 1] = '\0';
1257         if (identity && (lookup <= 1) && common_name[0] &&
1258             (strlen(common_name) < MAX_STRING_LEN)) {
1259                 pairadd(certs,
1260                         pairmake(cert_attr_names[FR_TLS_CN][lookup], common_name, T_OP_SET));
1261         }
1262
1263         /*
1264          *      If the CRL has expired, that might still be OK.
1265          */
1266         if (!my_ok &&
1267             (conf->allow_expired_crl) &&
1268             (err == X509_V_ERR_CRL_HAS_EXPIRED)) {
1269                 my_ok = 1;
1270                 X509_STORE_CTX_set_error( ctx, 0 );
1271         }
1272
1273         if (!my_ok) {
1274                 const char *p = X509_verify_cert_error_string(err);
1275                 radlog(L_ERR,"--> verify error:num=%d:%s\n",err, p);
1276                 radius_pairmake(request, &request->packet->vps,
1277                                 "Module-Failure-Message", p, T_OP_SET);
1278                 return my_ok;
1279         }
1280
1281         switch (ctx->error) {
1282
1283         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
1284                 radlog(L_ERR, "issuer= %s\n", issuer);
1285                 break;
1286         case X509_V_ERR_CERT_NOT_YET_VALID:
1287         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
1288                 radlog(L_ERR, "notBefore=");
1289 #if 0
1290                 ASN1_TIME_print(bio_err, X509_get_notBefore(ctx->current_cert));
1291 #endif
1292                 break;
1293         case X509_V_ERR_CERT_HAS_EXPIRED:
1294         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
1295                 radlog(L_ERR, "notAfter=");
1296 #if 0
1297                 ASN1_TIME_print(bio_err, X509_get_notAfter(ctx->current_cert));
1298 #endif
1299                 break;
1300         }
1301
1302         /*
1303          *      If we're at the actual client cert, apply additional
1304          *      checks.
1305          */
1306         if (depth == 0) {
1307                 /*
1308                  *      If the conf tells us to, check cert issuer
1309                  *      against the specified value and fail
1310                  *      verification if they don't match.
1311                  */
1312                 if (conf->check_cert_issuer &&
1313                     (strcmp(issuer, conf->check_cert_issuer) != 0)) {
1314                         radlog(L_AUTH, "rlm_eap_tls: Certificate issuer (%s) does not match specified value (%s)!", issuer, conf->check_cert_issuer);
1315                         my_ok = 0;
1316                 }
1317
1318                 /*
1319                  *      If the conf tells us to, check the CN in the
1320                  *      cert against xlat'ed value, but only if the
1321                  *      previous checks passed.
1322                  */
1323                 if (my_ok && conf->check_cert_cn) {
1324                         if (!radius_xlat(cn_str, sizeof(cn_str), conf->check_cert_cn, request, NULL)) {
1325                                 radlog(L_ERR, "rlm_eap_tls (%s): xlat failed.",
1326                                        conf->check_cert_cn);
1327                                 /* if this fails, fail the verification */
1328                                 my_ok = 0;
1329                         } else {
1330                                 RDEBUG2("checking certificate CN (%s) with xlat'ed value (%s)", common_name, cn_str);
1331                                 if (strcmp(cn_str, common_name) != 0) {
1332                                         radlog(L_AUTH, "rlm_eap_tls: Certificate CN (%s) does not match specified value (%s)!", common_name, cn_str);
1333                                         my_ok = 0;
1334                                 }
1335                         }
1336                 } /* check_cert_cn */
1337
1338 #ifdef HAVE_OPENSSL_OCSP_H
1339                 if (my_ok && conf->ocsp_enable){
1340                         RDEBUG2("--> Starting OCSP Request");
1341                         if(X509_STORE_CTX_get1_issuer(&issuer_cert, ctx, client_cert)!=1) {
1342                                 radlog(L_ERR, "Error: Couldn't get issuer_cert for %s", common_name);
1343                         }
1344                         my_ok = ocsp_check(ocsp_store, issuer_cert, client_cert, conf);
1345                 }
1346 #endif
1347
1348                 while (conf->verify_client_cert_cmd) {
1349                         char filename[256];
1350                         int fd;
1351                         FILE *fp;
1352
1353                         snprintf(filename, sizeof(filename), "%s/%s.client.XXXXXXXX",
1354                                  conf->verify_tmp_dir, progname);
1355                         fd = mkstemp(filename);
1356                         if (fd < 0) {
1357                                 RDEBUG("Failed creating file in %s: %s",
1358                                        conf->verify_tmp_dir, strerror(errno));
1359                                 break;
1360                         }
1361
1362                         fp = fdopen(fd, "w");
1363                         if (!fp) {
1364                                 RDEBUG("Failed opening file %s: %s",
1365                                        filename, strerror(errno));
1366                                 break;
1367                         }
1368
1369                         if (!PEM_write_X509(fp, client_cert)) {
1370                                 fclose(fp);
1371                                 RDEBUG("Failed writing certificate to file");
1372                                 goto do_unlink;
1373                         }
1374                         fclose(fp);
1375
1376                         if (!radius_pairmake(request, &request->packet->vps,
1377                                              "TLS-Client-Cert-Filename",
1378                                              filename, T_OP_SET)) {
1379                                 RDEBUG("Failed creating TLS-Client-Cert-Filename");
1380
1381                                 goto do_unlink;
1382                         }
1383
1384                         RDEBUG("Verifying client certificate: %s",
1385                                conf->verify_client_cert_cmd);
1386                         if (radius_exec_program(conf->verify_client_cert_cmd,
1387                                                 request, 1, NULL, 0,
1388                                                 request->packet->vps,
1389                                                 NULL, 1) != 0) {
1390                                 radlog(L_AUTH, "rlm_eap_tls: Certificate CN (%s) fails external verification!", common_name);
1391                                 my_ok = 0;
1392                         } else {
1393                                 RDEBUG("Client certificate CN %s passed external validation", common_name);
1394                         }
1395
1396                 do_unlink:
1397                         unlink(filename);
1398                         break;
1399                 }
1400
1401
1402         } /* depth == 0 */
1403
1404         if (debug_flag > 0) {
1405                 RDEBUG2("chain-depth=%d, ", depth);
1406                 RDEBUG2("error=%d", err);
1407
1408                 if (identity) RDEBUG2("--> User-Name = %s", *identity);
1409                 RDEBUG2("--> BUF-Name = %s", common_name);
1410                 RDEBUG2("--> subject = %s", subject);
1411                 RDEBUG2("--> issuer  = %s", issuer);
1412                 RDEBUG2("--> verify return:%d", my_ok);
1413         }
1414         return my_ok;
1415 }
1416
1417
1418 #ifdef HAVE_OPENSSL_OCSP_H
1419 /*
1420  *      Create Global X509 revocation store and use it to verify
1421  *      OCSP responses
1422  *
1423  *      - Load the trusted CAs
1424  *      - Load the trusted issuer certificates
1425  */
1426 static X509_STORE *init_revocation_store(fr_tls_server_conf_t *conf)
1427 {
1428         X509_STORE *store = NULL;
1429
1430         store = X509_STORE_new();
1431
1432         /* Load the CAs we trust */
1433         if (conf->ca_file || conf->ca_path)
1434                 if(!X509_STORE_load_locations(store, conf->ca_file, conf->ca_path)) {
1435                         radlog(L_ERR, "rlm_eap: X509_STORE error %s", ERR_error_string(ERR_get_error(), NULL));
1436                         radlog(L_ERR, "rlm_eap_tls: Error reading Trusted root CA list %s",conf->ca_file );
1437                         return NULL;
1438                 }
1439
1440 #ifdef X509_V_FLAG_CRL_CHECK
1441         if (conf->check_crl)
1442                 X509_STORE_set_flags(store, X509_V_FLAG_CRL_CHECK);
1443 #endif
1444         return store;
1445 }
1446 #endif  /* HAVE_OPENSSL_OCSP_H */
1447
1448 /*
1449  *      Create Global context SSL and use it in every new session
1450  *
1451  *      - Load the trusted CAs
1452  *      - Load the Private key & the certificate
1453  *      - Set the Context options & Verify options
1454  */
1455 static SSL_CTX *init_tls_ctx(fr_tls_server_conf_t *conf)
1456 {
1457         const SSL_METHOD *meth;
1458         SSL_CTX *ctx;
1459         X509_STORE *certstore;
1460         int verify_mode = SSL_VERIFY_NONE;
1461         int ctx_options = 0;
1462         int type;
1463
1464         /*
1465          *      Add all the default ciphers and message digests
1466          *      Create our context.
1467          */
1468         SSL_library_init();
1469         SSL_load_error_strings();
1470
1471         /*
1472          *      SHA256 is in all versions of OpenSSL, but isn't
1473          *      initialized by default.  It's needed for WiMAX
1474          *      certificates.
1475          */
1476 #ifdef HAVE_OPENSSL_EVP_SHA256
1477         EVP_add_digest(EVP_sha256());
1478 #endif
1479
1480         meth = TLSv1_method();
1481         ctx = SSL_CTX_new(meth);
1482
1483         /*
1484          * Identify the type of certificates that needs to be loaded
1485          */
1486         if (conf->file_type) {
1487                 type = SSL_FILETYPE_PEM;
1488         } else {
1489                 type = SSL_FILETYPE_ASN1;
1490         }
1491
1492         /*
1493          * Set the password to load private key
1494          */
1495         if (conf->private_key_password) {
1496 #ifdef __APPLE__
1497                 /*
1498                  * We don't want to put the private key password in eap.conf, so  check
1499                  * for our special string which indicates we should get the password
1500                  * programmatically.
1501                  */
1502                 const char* special_string = "Apple:UseCertAdmin";
1503                 if (strncmp(conf->private_key_password,
1504                                         special_string,
1505                                         strlen(special_string)) == 0)
1506                 {
1507                         char cmd[256];
1508                         const long max_password_len = 128;
1509                         snprintf(cmd, sizeof(cmd) - 1,
1510                                          "/usr/sbin/certadmin --get-private-key-passphrase \"%s\"",
1511                                          conf->private_key_file);
1512
1513                         DEBUG2("rlm_eap: Getting private key passphrase using command \"%s\"", cmd);
1514
1515                         FILE* cmd_pipe = popen(cmd, "r");
1516                         if (!cmd_pipe) {
1517                                 radlog(L_ERR, "rlm_eap: %s command failed.      Unable to get private_key_password", cmd);
1518                                 radlog(L_ERR, "rlm_eap: Error reading private_key_file %s", conf->private_key_file);
1519                                 return NULL;
1520                         }
1521
1522                         free(conf->private_key_password);
1523                         conf->private_key_password = malloc(max_password_len * sizeof(char));
1524                         if (!conf->private_key_password) {
1525                                 radlog(L_ERR, "rlm_eap: Can't malloc space for private_key_password");
1526                                 radlog(L_ERR, "rlm_eap: Error reading private_key_file %s", conf->private_key_file);
1527                                 pclose(cmd_pipe);
1528                                 return NULL;
1529                         }
1530
1531                         fgets(conf->private_key_password, max_password_len, cmd_pipe);
1532                         pclose(cmd_pipe);
1533
1534                         /* Get rid of newline at end of password. */
1535                         conf->private_key_password[strlen(conf->private_key_password) - 1] = '\0';
1536                         DEBUG2("rlm_eap:  Password from command = \"%s\"", conf->private_key_password);
1537                 }
1538 #endif
1539                 SSL_CTX_set_default_passwd_cb_userdata(ctx, conf->private_key_password);
1540                 SSL_CTX_set_default_passwd_cb(ctx, cbtls_password);
1541         }
1542
1543         /*
1544          *      Load our keys and certificates
1545          *
1546          *      If certificates are of type PEM then we can make use
1547          *      of cert chain authentication using openssl api call
1548          *      SSL_CTX_use_certificate_chain_file.  Please see how
1549          *      the cert chain needs to be given in PEM from
1550          *      openSSL.org
1551          */
1552         if (!conf->certificate_file) goto load_ca;
1553
1554         if (type == SSL_FILETYPE_PEM) {
1555                 if (!(SSL_CTX_use_certificate_chain_file(ctx, conf->certificate_file))) {
1556                         radlog(L_ERR, "Error reading certificate file %s:%s",
1557                                conf->certificate_file,
1558                                ERR_error_string(ERR_get_error(), NULL));
1559                         return NULL;
1560                 }
1561
1562         } else if (!(SSL_CTX_use_certificate_file(ctx, conf->certificate_file, type))) {
1563                 radlog(L_ERR, "Error reading certificate file %s:%s",
1564                        conf->certificate_file,
1565                        ERR_error_string(ERR_get_error(), NULL));
1566                 return NULL;
1567         }
1568
1569         /* Load the CAs we trust */
1570 load_ca:
1571         if (conf->ca_file || conf->ca_path) {
1572                 if (!SSL_CTX_load_verify_locations(ctx, conf->ca_file, conf->ca_path)) {
1573                         radlog(L_ERR, "rlm_eap: SSL error %s", ERR_error_string(ERR_get_error(), NULL));
1574                         radlog(L_ERR, "rlm_eap_tls: Error reading Trusted root CA list %s",conf->ca_file );
1575                         return NULL;
1576                 }
1577         }
1578         if (conf->ca_file && *conf->ca_file) SSL_CTX_set_client_CA_list(ctx, SSL_load_client_CA_file(conf->ca_file));
1579
1580         if (conf->private_key_file) {
1581                 if (!(SSL_CTX_use_PrivateKey_file(ctx, conf->private_key_file, type))) {
1582                         radlog(L_ERR, "Failed reading private key file %s:%s",
1583                                conf->private_key_file,
1584                                ERR_error_string(ERR_get_error(), NULL));
1585                         return NULL;
1586                 }
1587
1588                 /*
1589                  * Check if the loaded private key is the right one
1590                  */
1591                 if (!SSL_CTX_check_private_key(ctx)) {
1592                         radlog(L_ERR, "Private key does not match the certificate public key");
1593                         return NULL;
1594                 }
1595         }
1596
1597         /*
1598          *      Set ctx_options
1599          */
1600         ctx_options |= SSL_OP_NO_SSLv2;
1601         ctx_options |= SSL_OP_NO_SSLv3;
1602 #ifdef SSL_OP_NO_TICKET
1603         ctx_options |= SSL_OP_NO_TICKET ;
1604 #endif
1605
1606         /*
1607          *      SSL_OP_SINGLE_DH_USE must be used in order to prevent
1608          *      small subgroup attacks and forward secrecy. Always
1609          *      using
1610          *
1611          *      SSL_OP_SINGLE_DH_USE has an impact on the computer
1612          *      time needed during negotiation, but it is not very
1613          *      large.
1614          */
1615         ctx_options |= SSL_OP_SINGLE_DH_USE;
1616
1617         /*
1618          *      SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS to work around issues
1619          *      in Windows Vista client.
1620          *      http://www.openssl.org/~bodo/tls-cbc.txt
1621          *      http://www.nabble.com/(RADIATOR)-Radiator-Version-3.16-released-t2600070.html
1622          */
1623         ctx_options |= SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS;
1624
1625         SSL_CTX_set_options(ctx, ctx_options);
1626
1627         /*
1628          *      TODO: Set the RSA & DH
1629          *      SSL_CTX_set_tmp_rsa_callback(ctx, cbtls_rsa);
1630          *      SSL_CTX_set_tmp_dh_callback(ctx, cbtls_dh);
1631          */
1632
1633         /*
1634          *      set the message callback to identify the type of
1635          *      message.  For every new session, there can be a
1636          *      different callback argument.
1637          *
1638          *      SSL_CTX_set_msg_callback(ctx, cbtls_msg);
1639          */
1640
1641         /* Set Info callback */
1642         SSL_CTX_set_info_callback(ctx, cbtls_info);
1643
1644         /*
1645          *      Callbacks, etc. for session resumption.
1646          */
1647         if (conf->session_cache_enable) {
1648                 SSL_CTX_sess_set_new_cb(ctx, cbtls_new_session);
1649                 SSL_CTX_sess_set_get_cb(ctx, cbtls_get_session);
1650                 SSL_CTX_sess_set_remove_cb(ctx, cbtls_remove_session);
1651
1652                 SSL_CTX_set_quiet_shutdown(ctx, 1);
1653         }
1654
1655         /*
1656          *      Check the certificates for revocation.
1657          */
1658 #ifdef X509_V_FLAG_CRL_CHECK
1659         if (conf->check_crl) {
1660           certstore = SSL_CTX_get_cert_store(ctx);
1661           if (certstore == NULL) {
1662             radlog(L_ERR, "rlm_eap: SSL error %s", ERR_error_string(ERR_get_error(), NULL));
1663             radlog(L_ERR, "rlm_eap_tls: Error reading Certificate Store");
1664             return NULL;
1665           }
1666           X509_STORE_set_flags(certstore, X509_V_FLAG_CRL_CHECK);
1667         }
1668 #endif
1669
1670         /*
1671          *      Set verify modes
1672          *      Always verify the peer certificate
1673          */
1674         verify_mode |= SSL_VERIFY_PEER;
1675         verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
1676         verify_mode |= SSL_VERIFY_CLIENT_ONCE;
1677         SSL_CTX_set_verify(ctx, verify_mode, cbtls_verify);
1678
1679         if (conf->verify_depth) {
1680                 SSL_CTX_set_verify_depth(ctx, conf->verify_depth);
1681         }
1682
1683         /* Load randomness */
1684         if (!(RAND_load_file(conf->random_file, 1024*1024))) {
1685                 radlog(L_ERR, "rlm_eap: SSL error %s", ERR_error_string(ERR_get_error(), NULL));
1686                 radlog(L_ERR, "rlm_eap_tls: Error loading randomness");
1687                 return NULL;
1688         }
1689
1690         /*
1691          * Set the cipher list if we were told to
1692          */
1693         if (conf->cipher_list) {
1694                 if (!SSL_CTX_set_cipher_list(ctx, conf->cipher_list)) {
1695                         radlog(L_ERR, "rlm_eap_tls: Error setting cipher list");
1696                         return NULL;
1697                 }
1698         }
1699
1700         /*
1701          *      Setup session caching
1702          */
1703         if (conf->session_cache_enable) {
1704                 /*
1705                  *      Create a unique context Id per EAP-TLS configuration.
1706                  */
1707                 if (conf->session_id_name) {
1708                         snprintf(conf->session_context_id,
1709                                  sizeof(conf->session_context_id),
1710                                  "FreeRADIUS EAP-TLS %s",
1711                                  conf->session_id_name);
1712                 } else {
1713                         snprintf(conf->session_context_id,
1714                                  sizeof(conf->session_context_id),
1715                                  "FreeRADIUS EAP-TLS %p", conf);
1716                 }
1717
1718                 /*
1719                  *      Cache it, and DON'T auto-clear it.
1720                  */
1721                 SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_SERVER | SSL_SESS_CACHE_NO_AUTO_CLEAR);
1722
1723                 SSL_CTX_set_session_id_context(ctx,
1724                                                (unsigned char *) conf->session_context_id,
1725                                                (unsigned int) strlen(conf->session_context_id));
1726
1727                 /*
1728                  *      Our timeout is in hours, this is in seconds.
1729                  */
1730                 SSL_CTX_set_timeout(ctx, conf->session_timeout * 3600);
1731
1732                 /*
1733                  *      Set the maximum number of entries in the
1734                  *      session cache.
1735                  */
1736                 SSL_CTX_sess_set_cache_size(ctx, conf->session_cache_size);
1737
1738         } else {
1739                 SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_OFF);
1740         }
1741
1742         return ctx;
1743 }
1744
1745
1746 void tls_server_conf_free(fr_tls_server_conf_t *conf)
1747 {
1748         if (!conf) return;
1749
1750         if (conf->cs) cf_section_parse_free(conf->cs, conf);
1751
1752         if (conf->ctx) SSL_CTX_free(conf->ctx);
1753
1754 #ifdef HAVE_OPENSSL_OCSP_H
1755         if (conf->ocsp_store) X509_STORE_free(conf->ocsp_store);
1756         conf->ocsp_store = NULL;
1757 #endif
1758
1759         memset(conf, 0, sizeof(*conf));
1760         free(conf);
1761 }
1762
1763
1764 fr_tls_server_conf_t *tls_server_conf_parse(CONF_SECTION *cs)
1765 {
1766         fr_tls_server_conf_t *conf;
1767
1768         conf = malloc(sizeof(*conf));
1769         if (!conf) {
1770                 radlog(L_ERR, "Out of memory");
1771                 return NULL;
1772         }
1773         memset(conf, 0, sizeof(*conf));
1774
1775         if (cf_section_parse(cs, conf, tls_server_config) < 0) {
1776         error:
1777                 tls_server_conf_free(conf);
1778                 return NULL;
1779         }
1780
1781         /*
1782          *      Save people from their own stupidity.
1783          */
1784         if (conf->fragment_size < 100) conf->fragment_size = 100;
1785
1786         /*
1787          *      This magic makes the administrators life HUGELY easier
1788          *      on initial deployments.
1789          *
1790          *      If the server starts up in debugging mode, AND the
1791          *      bootstrap command is configured, AND it exists, AND
1792          *      there is no server certificate
1793          */
1794         if (conf->make_cert_command && (debug_flag >= 2)) {
1795                 struct stat buf;
1796
1797                 if ((stat(conf->make_cert_command, &buf) == 0) &&
1798                     (stat(conf->certificate_file, &buf) < 0) &&
1799                     (errno == ENOENT) &&
1800                     (radius_exec_program(conf->make_cert_command, NULL, 1,
1801                                          NULL, 0, NULL, NULL, 0) != 0)) {
1802                         goto error;
1803                 }
1804         }
1805
1806         if (!conf->private_key_file) {
1807                 radlog(L_ERR, "TLS Server requires a private key file");
1808                 goto error;
1809         }
1810
1811         if (!conf->private_key_password) {
1812                 radlog(L_ERR, "TLS Server requires a private key password");
1813                 goto error;
1814         }
1815
1816         if (!conf->certificate_file) {
1817                 radlog(L_ERR, "TLS Server requires a certificate file");
1818                 goto error;
1819         }
1820
1821         /*
1822          *      Initialize TLS
1823          */
1824         conf->ctx = init_tls_ctx(conf);
1825         if (conf->ctx == NULL) {
1826                 goto error;
1827         }
1828
1829 #ifdef HAVE_OPENSSL_OCSP_H
1830         /*
1831          *      Initialize OCSP Revocation Store
1832          */
1833         if (conf->ocsp_enable) {
1834                 conf->ocsp_store = init_revocation_store(conf);
1835                 if (conf->ocsp_store == NULL) goto error;
1836         }
1837 #endif HAVE_OPENSSL_OCSP_H
1838
1839         if (load_dh_params(conf->ctx, conf->dh_file) < 0) {
1840                 goto error;
1841         }
1842
1843         if (generate_eph_rsa_key(conf->ctx) < 0) {
1844                 goto error;
1845         }
1846
1847         if (conf->verify_tmp_dir) {
1848                 if (chmod(conf->verify_tmp_dir, S_IRWXU) < 0) {
1849                         radlog(L_ERR, "Failed changing permissions on %s: %s", conf->verify_tmp_dir, strerror(errno));
1850                         goto error;
1851                 }
1852         }
1853
1854         if (conf->verify_client_cert_cmd && !conf->verify_tmp_dir) {
1855                 radlog(L_ERR, "You MUST set the verify directory in order to use verify_client_cmd");
1856                 goto error;
1857         }
1858
1859         return conf;
1860 }
1861
1862 fr_tls_server_conf_t *tls_client_conf_parse(CONF_SECTION *cs)
1863 {
1864         fr_tls_server_conf_t *conf;
1865
1866         conf = malloc(sizeof(*conf));
1867         if (!conf) {
1868                 radlog(L_ERR, "Out of memory");
1869                 return NULL;
1870         }
1871         memset(conf, 0, sizeof(*conf));
1872
1873         if (cf_section_parse(cs, conf, tls_client_config) < 0) {
1874         error:
1875                 tls_server_conf_free(conf);
1876                 return NULL;
1877         }
1878
1879         /*
1880          *      Save people from their own stupidity.
1881          */
1882         if (conf->fragment_size < 100) conf->fragment_size = 100;
1883
1884         /*
1885          *      Initialize TLS
1886          */
1887         conf->ctx = init_tls_ctx(conf);
1888         if (conf->ctx == NULL) {
1889                 goto error;
1890         }
1891
1892         if (load_dh_params(conf->ctx, conf->dh_file) < 0) {
1893                 goto error;
1894         }
1895
1896         if (generate_eph_rsa_key(conf->ctx) < 0) {
1897                 goto error;
1898         }
1899
1900         return conf;
1901 }
1902
1903 int tls_success(tls_session_t *ssn, REQUEST *request)
1904 {
1905         VALUE_PAIR *vp, *vps = NULL;
1906         fr_tls_server_conf_t *conf;
1907
1908         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssn->ssl, FR_TLS_EX_INDEX_CONF);
1909         rad_assert(conf != NULL);
1910
1911         /*
1912          *      If there's no session resumption, delete the entry
1913          *      from the cache.  This means either it's disabled
1914          *      globally for this SSL context, OR we were told to
1915          *      disable it for this user.
1916          *
1917          *      This also means you can't turn it on just for one
1918          *      user.
1919          */
1920         if ((!ssn->allow_session_resumption) ||
1921             (((vp = pairfind(request->config_items, 1127, 0)) != NULL) &&
1922              (vp->vp_integer == 0))) {
1923                 SSL_CTX_remove_session(ssn->ctx,
1924                                        ssn->ssl->session);
1925                 ssn->allow_session_resumption = 0;
1926
1927                 /*
1928                  *      If we're in a resumed session and it's
1929                  *      not allowed,
1930                  */
1931                 if (SSL_session_reused(ssn->ssl)) {
1932                         RDEBUG("FAIL: Forcibly stopping session resumption as it is not allowed.");
1933                         return -1;
1934                 }
1935
1936                 /*
1937                  *      Else resumption IS allowed, so we store the
1938                  *      user data in the cache.
1939                  */
1940         } else if (!SSL_session_reused(ssn->ssl)) {
1941                 RDEBUG2("Saving response in the cache");
1942
1943                 vp = paircopy2(request->reply->vps, PW_USER_NAME, 0);
1944                 if (vp) pairadd(&vps, vp);
1945
1946                 vp = paircopy2(request->packet->vps, PW_STRIPPED_USER_NAME, 0);
1947                 if (vp) pairadd(&vps, vp);
1948
1949                 vp = paircopy2(request->reply->vps, PW_CACHED_SESSION_POLICY, 0);
1950                 if (vp) pairadd(&vps, vp);
1951
1952                 if (vps) {
1953                         SSL_SESSION_set_ex_data(ssn->ssl->session,
1954                                                 FR_TLS_EX_INDEX_VPS, vps);
1955                 } else {
1956                         RDEBUG2("WARNING: No information to cache: session caching will be disabled for this session.");
1957                         SSL_CTX_remove_session(ssn->ctx,
1958                                                ssn->ssl->session);
1959                 }
1960
1961                 /*
1962                  *      Else the session WAS allowed.  Copy the cached
1963                  *      reply.
1964                  */
1965         } else {
1966
1967                 vp = SSL_SESSION_get_ex_data(ssn->ssl->session,
1968                                              FR_TLS_EX_INDEX_VPS);
1969                 if (!vp) {
1970                         RDEBUG("WARNING: No information in cached session!");
1971                         return -1;
1972
1973                 } else {
1974                         RDEBUG("Adding cached attributes to the reply:");
1975                         debug_pair_list(vp);
1976                         pairadd(&request->reply->vps, paircopy(vp));
1977
1978                         /*
1979                          *      Mark the request as resumed.
1980                          */
1981                         vp = pairmake("EAP-Session-Resumed", "1", T_OP_SET);
1982                         if (vp) pairadd(&request->packet->vps, vp);
1983                 }
1984         }
1985
1986         return 0;
1987 }
1988
1989
1990 void tls_fail(tls_session_t *ssn)
1991 {
1992         /*
1993          *      Force the session to NOT be cached.
1994          */
1995         SSL_CTX_remove_session(ssn->ctx, ssn->ssl->session);
1996 }
1997
1998 fr_tls_status_t tls_application_data(tls_session_t *ssn,
1999                                      REQUEST *request)
2000
2001 {
2002         int err;
2003
2004         /*
2005          *      Decrypt the complete record.
2006          */
2007         err = BIO_write(ssn->into_ssl, ssn->dirty_in.data,
2008                         ssn->dirty_in.used);
2009         if (err != (int) ssn->dirty_in.used) {
2010                 record_init(&ssn->dirty_in);
2011                 RDEBUG("Failed writing %d to SSL BIO: %d",
2012                        ssn->dirty_in.used, err);
2013                 return FR_TLS_FAIL;
2014         }
2015
2016         /*
2017          *      Clear the dirty buffer now that we are done with it
2018          *      and init the clean_out buffer to store decrypted data
2019          */
2020         record_init(&ssn->dirty_in);
2021         record_init(&ssn->clean_out);
2022
2023         /*
2024          *      Read (and decrypt) the tunneled data from the
2025          *      SSL session, and put it into the decrypted
2026          *      data buffer.
2027          */
2028         err = SSL_read(ssn->ssl, ssn->clean_out.data,
2029                        sizeof(ssn->clean_out.data));
2030
2031         if (err < 0) {
2032                 int code;
2033
2034                 RDEBUG("SSL_read Error");
2035
2036                 code = SSL_get_error(ssn->ssl, err);
2037                 switch (code) {
2038                 case SSL_ERROR_WANT_READ:
2039                         return FR_TLS_MORE_FRAGMENTS;
2040                         DEBUG("Error in fragmentation logic: SSL_WANT_READ");
2041                         break;
2042
2043                 case SSL_ERROR_WANT_WRITE:
2044                         DEBUG("Error in fragmentation logic: SSL_WANT_WRITE");
2045                         break;
2046
2047                 default:
2048                         DEBUG("Error in fragmentation logic: ?");
2049
2050                         /*
2051                          *      FIXME: Call int_ssl_check?
2052                          */
2053                         break;
2054                 }
2055                 return FR_TLS_FAIL;
2056         }
2057
2058         if (err == 0) {
2059                 RDEBUG("WARNING: No data inside of the tunnel.");
2060         }
2061
2062         /*
2063          *      Passed all checks, successfully decrypted data
2064          */
2065         ssn->clean_out.used = err;
2066
2067         return FR_TLS_OK;
2068 }
2069
2070
2071 /*
2072  * Acknowledge received is for one of the following messages sent earlier
2073  * 1. Handshake completed Message, so now send, EAP-Success
2074  * 2. Alert Message, now send, EAP-Failure
2075  * 3. Fragment Message, now send, next Fragment
2076  */
2077 fr_tls_status_t tls_ack_handler(tls_session_t *ssn, REQUEST *request)
2078 {
2079         RDEBUG2("Received TLS ACK");
2080
2081         if (ssn == NULL){
2082                 radlog_request(L_ERR, 0, request, "FAIL: Unexpected ACK received.  Could not obtain session information.");
2083                 return FR_TLS_INVALID;
2084         }
2085         if (ssn->info.initialized == 0) {
2086                 RDEBUG("No SSL info available. Waiting for more SSL data.");
2087                 return FR_TLS_REQUEST;
2088         }
2089         if ((ssn->info.content_type == handshake) &&
2090             (ssn->info.origin == 0)) {
2091                 radlog_request(L_ERR, 0, request, "FAIL: ACK without earlier message.");
2092                 return FR_TLS_INVALID;
2093         }
2094
2095         switch (ssn->info.content_type) {
2096         case alert:
2097                 RDEBUG2("ACK alert");
2098                 return FR_TLS_FAIL;
2099
2100         case handshake:
2101                 if ((ssn->info.handshake_type == finished) &&
2102                     (ssn->dirty_out.used == 0)) {
2103                         RDEBUG2("ACK handshake is finished");
2104
2105                         /*
2106                          *      From now on all the content is
2107                          *      application data set it here as nobody else
2108                          *      sets it.
2109                          */
2110                         ssn->info.content_type = application_data;
2111                         return FR_TLS_SUCCESS;
2112                 } /* else more data to send */
2113
2114                 RDEBUG2("ACK handshake fragment handler");
2115                 /* Fragmentation handler, send next fragment */
2116                 return FR_TLS_REQUEST;
2117
2118         case application_data:
2119                 RDEBUG2("ACK handshake fragment handler in application data");
2120                 return FR_TLS_REQUEST;
2121
2122                 /*
2123                  *      For the rest of the conditions, switch over
2124                  *      to the default section below.
2125                  */
2126         default:
2127                 RDEBUG2("ACK default");
2128                 radlog_request(L_ERR, 0, request, "Invalid ACK received: %d",
2129                        ssn->info.content_type);
2130                 return FR_TLS_INVALID;
2131         }
2132 }
2133
2134 static void dump_hex(const char *msg, const uint8_t *data, size_t data_len)
2135 {
2136         size_t i;
2137
2138         if (debug_flag < 3) return;
2139
2140         printf("%s %d\n", msg, (int) data_len);
2141         if (data_len > 256) data_len = 256;
2142
2143         for (i = 0; i < data_len; i++) {
2144                 if ((i & 0x0f) == 0x00) printf ("%02x: ", (unsigned int) i);
2145                 printf("%02x ", data[i]);
2146                 if ((i & 0x0f) == 0x0f) printf ("\n");
2147         }
2148         printf("\n");
2149         fflush(stdout);
2150 }
2151
2152 static void tls_socket_close(rad_listen_t *listener)
2153 {
2154         listen_socket_t *sock = listener->data;
2155
2156         listener->status = RAD_LISTEN_STATUS_REMOVE_FD;
2157         listener->tls = NULL; /* parent owns this! */
2158
2159         if (sock->parent) {
2160                 /*
2161                  *      Decrement the number of connections.
2162                  */
2163                 if (sock->parent->num_connections > 0) {
2164                         sock->parent->num_connections--;
2165                 }
2166                 if (sock->client->num_connections > 0) {
2167                         sock->client->num_connections--;
2168                 }
2169         }
2170
2171         /*
2172          *      Tell the event handler that an FD has disappeared.
2173          */
2174         DEBUG("Client has closed connection");
2175         event_new_fd(listener);
2176
2177         /*
2178          *      Do NOT free the listener here.  It's in use by
2179          *      a request, and will need to hang around until
2180          *      all of the requests are done.
2181          *
2182          *      It is instead free'd in remove_from_request_hash()
2183          */
2184 }
2185
2186 static int tls_socket_write(rad_listen_t *listener, REQUEST *request)
2187 {
2188         uint8_t *p;
2189         ssize_t rcode;
2190         listen_socket_t *sock = listener->data;
2191
2192         p = sock->ssn->dirty_out.data;
2193
2194         while (p < (sock->ssn->dirty_out.data + sock->ssn->dirty_out.used)) {
2195                 RDEBUG3("Writing to socket %d", request->packet->sockfd);
2196                 rcode = write(request->packet->sockfd, p,
2197                               (sock->ssn->dirty_out.data + sock->ssn->dirty_out.used) - p);
2198                 if (rcode <= 0) {
2199                         RDEBUG("Error writing to TLS socket: %s", strerror(errno));
2200
2201                         tls_socket_close(listener);
2202                         return 0;
2203                 }
2204                 p += rcode;
2205         }
2206
2207         sock->ssn->dirty_out.used = 0;
2208
2209         return 1;
2210 }
2211
2212
2213 static int tls_socket_recv(rad_listen_t *listener)
2214 {
2215         int doing_init = FALSE;
2216         ssize_t rcode;
2217         RADIUS_PACKET *packet;
2218         REQUEST *request;
2219         listen_socket_t *sock = listener->data;
2220         fr_tls_status_t status;
2221         RADCLIENT *client = sock->client;
2222
2223         if (!sock->packet) {
2224                 sock->packet = rad_alloc(0);
2225                 if (!sock->packet) return 0;
2226
2227                 sock->packet->sockfd = listener->fd;
2228                 sock->packet->src_ipaddr = sock->other_ipaddr;
2229                 sock->packet->src_port = sock->other_port;
2230                 sock->packet->dst_ipaddr = sock->my_ipaddr;
2231                 sock->packet->dst_port = sock->my_port;
2232
2233                 if (sock->request) sock->request->packet = sock->packet;
2234         }
2235
2236         /*
2237          *      Allocate a REQUEST for debugging.
2238          */
2239         if (!sock->request) {
2240                 sock->request = request = request_alloc();
2241                 if (!sock->request) {
2242                         radlog(L_ERR, "Out of memory");
2243                         return 0;
2244                 }
2245
2246                 rad_assert(request->packet == NULL);
2247                 rad_assert(sock->packet != NULL);
2248                 request->packet = sock->packet;
2249
2250                 request->component = "<core>";
2251                 request->component = "<tls-connect>";
2252
2253                 /*
2254                  *      Not sure if we should do this on every packet...
2255                  */
2256                 request->reply = rad_alloc(0);
2257                 if (!request->reply) return 0;
2258
2259                 request->options = RAD_REQUEST_OPTION_DEBUG2;
2260
2261                 rad_assert(sock->ssn == NULL);
2262
2263                 sock->ssn = tls_new_session(listener->tls, sock->request,
2264                                             listener->tls->require_client_cert);
2265                 if (!sock->ssn) {
2266                         request_free(&sock->request);
2267                         sock->packet = NULL;
2268                         return 0;
2269                 }
2270
2271                 SSL_set_ex_data(sock->ssn->ssl, FR_TLS_EX_INDEX_REQUEST, (void *)request);
2272                 SSL_set_ex_data(sock->ssn->ssl, FR_TLS_EX_INDEX_CERTS, (void *)&request->packet->vps);
2273
2274                 doing_init = TRUE;
2275         }
2276
2277         rad_assert(sock->request != NULL);
2278         rad_assert(sock->request->packet != NULL);
2279         rad_assert(sock->packet != NULL);
2280         rad_assert(sock->ssn != NULL);
2281
2282         request = sock->request;
2283
2284         RDEBUG3("Reading from socket %d", request->packet->sockfd);
2285         PTHREAD_MUTEX_LOCK(&sock->mutex);
2286         rcode = read(request->packet->sockfd,
2287                      sock->ssn->dirty_in.data,
2288                      sizeof(sock->ssn->dirty_in.data));
2289         if ((rcode < 0) && (errno == ECONNRESET)) {
2290         do_close:
2291                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
2292                 tls_socket_close(listener);
2293                 return 0;
2294         }
2295
2296         if (rcode < 0) {
2297                 RDEBUG("Error reading TLS socket: %s", strerror(errno));
2298                 goto do_close;
2299         }
2300
2301         /*
2302          *      Normal socket close.
2303          */
2304         if (rcode == 0) goto do_close;
2305
2306         sock->ssn->dirty_in.used = rcode;
2307         memset(sock->ssn->dirty_in.data + sock->ssn->dirty_in.used,
2308                0, 16);
2309
2310         dump_hex("READ FROM SSL", sock->ssn->dirty_in.data, sock->ssn->dirty_in.used);
2311
2312         /*
2313          *      Catch attempts to use non-SSL.
2314          */
2315         if (doing_init && (sock->ssn->dirty_in.data[0] != handshake)) {
2316                 RDEBUG("Non-TLS data sent to TLS socket: closing");
2317                 goto do_close;
2318         }
2319
2320         /*
2321          *      Skip ahead to reading application data.
2322          */
2323         if (SSL_is_init_finished(sock->ssn->ssl)) goto app;
2324
2325         if (!tls_handshake_recv(request, sock->ssn)) {
2326                 RDEBUG("FAILED in TLS handshake receive");
2327                 goto do_close;
2328         }
2329
2330         if (sock->ssn->dirty_out.used > 0) {
2331                 tls_socket_write(listener, request);
2332                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
2333                 return 0;
2334         }
2335
2336 app:
2337         /*
2338          *      FIXME: Run the packet through a virtual server in
2339          *      order to see if we like the certificate presented by
2340          *      the client.
2341          */
2342
2343         status = tls_application_data(sock->ssn, request);
2344         RDEBUG("Application data status %d", status);
2345
2346         if (status == FR_TLS_MORE_FRAGMENTS) {
2347                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
2348                 return 0;
2349         }
2350
2351         if (sock->ssn->clean_out.used == 0) {
2352                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
2353                 return 0;
2354         }
2355
2356         dump_hex("TUNNELED DATA", sock->ssn->clean_out.data, sock->ssn->clean_out.used);
2357
2358         /*
2359          *      If the packet is a complete RADIUS packet, return it to
2360          *      the caller.  Otherwise...
2361          */
2362         if ((sock->ssn->clean_out.used < 20) ||
2363             (((sock->ssn->clean_out.data[2] << 8) | sock->ssn->clean_out.data[3]) != (int) sock->ssn->clean_out.used)) {
2364                 RDEBUG("Received bad packet: Length %d contents %d",
2365                        sock->ssn->clean_out.used,
2366                        (sock->ssn->clean_out.data[2] << 8) | sock->ssn->clean_out.data[3]);
2367                 goto do_close;
2368         }
2369
2370         packet = sock->packet;
2371         packet->data = rad_malloc(sock->ssn->clean_out.used);
2372         packet->data_len = sock->ssn->clean_out.used;
2373         memcpy(packet->data, sock->ssn->clean_out.data, packet->data_len);
2374         packet->vps = NULL;
2375         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
2376
2377         if (!rad_packet_ok(packet, 0)) {
2378                 RDEBUG("Received bad packet: %s", fr_strerror());
2379                 tls_socket_close(listener);
2380                 return 0;       /* do_close unlocks the mutex */
2381         }
2382
2383         /*
2384          *      Copied from src/lib/radius.c, rad_recv();
2385          */
2386         if (fr_debug_flag) {
2387                 char host_ipaddr[128];
2388
2389                 if ((packet->code > 0) && (packet->code < FR_MAX_PACKET_CODE)) {
2390                         RDEBUG("tls_recv: %s packet from host %s port %d, id=%d, length=%d",
2391                                fr_packet_codes[packet->code],
2392                                inet_ntop(packet->src_ipaddr.af,
2393                                          &packet->src_ipaddr.ipaddr,
2394                                          host_ipaddr, sizeof(host_ipaddr)),
2395                                packet->src_port,
2396                                packet->id, (int) packet->data_len);
2397                 } else {
2398                         RDEBUG("tls_recv: Packet from host %s port %d code=%d, id=%d, length=%d",
2399                                inet_ntop(packet->src_ipaddr.af,
2400                                          &packet->src_ipaddr.ipaddr,
2401                                          host_ipaddr, sizeof(host_ipaddr)),
2402                                packet->src_port,
2403                                packet->code,
2404                                packet->id, (int) packet->data_len);
2405                 }
2406         }
2407
2408         FR_STATS_INC(auth, total_requests);
2409
2410         return 1;
2411 }
2412
2413
2414 int dual_tls_recv(rad_listen_t *listener)
2415 {
2416         RADIUS_PACKET *packet;
2417         REQUEST *request;
2418         RAD_REQUEST_FUNP fun = NULL;
2419         listen_socket_t *sock = listener->data;
2420         RADCLIENT       *client = sock->client;
2421
2422         if (!tls_socket_recv(listener)) {
2423                 return 0;
2424         }
2425
2426         rad_assert(sock->request != NULL);
2427         rad_assert(sock->request->packet != NULL);
2428         rad_assert(sock->packet != NULL);
2429         rad_assert(sock->ssn != NULL);
2430
2431         request = sock->request;
2432         packet = sock->packet;
2433
2434         /*
2435          *      Some sanity checks, based on the packet code.
2436          */
2437         switch(packet->code) {
2438         case PW_AUTHENTICATION_REQUEST:
2439                 if (listener->type != RAD_LISTEN_AUTH) goto bad_packet;
2440                 FR_STATS_INC(auth, total_requests);
2441                 fun = rad_authenticate;
2442                 break;
2443
2444         case PW_ACCOUNTING_REQUEST:
2445                 if (listener->type != RAD_LISTEN_ACCT) goto bad_packet;
2446                 FR_STATS_INC(acct, total_requests);
2447                 fun = rad_accounting;
2448                 break;
2449
2450         case PW_STATUS_SERVER:
2451                 if (!mainconfig.status_server) {
2452                         FR_STATS_INC(auth, total_unknown_types);
2453                         DEBUG("WARNING: Ignoring Status-Server request due to security configuration");
2454                         rad_free(&sock->packet);
2455                         request->packet = NULL;
2456                         return 0;
2457                 }
2458                 fun = rad_status_server;
2459                 break;
2460
2461         default:
2462         bad_packet:
2463                 FR_STATS_INC(auth, total_unknown_types);
2464
2465                 DEBUG("Invalid packet code %d sent from client %s port %d : IGNORED",
2466                       packet->code, client->shortname, packet->src_port);
2467                 rad_free(&sock->packet);
2468                 request->packet = NULL;
2469                 return 0;
2470         } /* switch over packet types */
2471
2472         if (!request_receive(listener, packet, client, fun)) {
2473                 FR_STATS_INC(auth, total_packets_dropped);
2474                 rad_free(&sock->packet);
2475                 request->packet = NULL;
2476                 return 0;
2477         }
2478
2479         sock->packet = NULL;    /* we have no need for more partial reads */
2480         request->packet = NULL;
2481
2482         return 1;
2483 }
2484
2485
2486 /*
2487  *      Send a response packet
2488  */
2489 int dual_tls_send(rad_listen_t *listener, REQUEST *request)
2490 {
2491         listen_socket_t *sock = listener->data;
2492
2493         rad_assert(request->listener == listener);
2494         rad_assert(listener->send == dual_tls_send);
2495
2496         /*
2497          *      Accounting reject's are silently dropped.
2498          *
2499          *      We do it here to avoid polluting the rest of the
2500          *      code with this knowledge
2501          */
2502         if (request->reply->code == 0) return 0;
2503
2504         /*
2505          *      Pack the VPs
2506          */
2507         if (rad_encode(request->reply, request->packet,
2508                        request->client->secret) < 0) {
2509                 RDEBUG("Failed encoding packet: %s", fr_strerror());
2510                 return 0;
2511         }
2512
2513         /*
2514          *      Sign the packet.
2515          */
2516         if (rad_sign(request->reply, request->packet,
2517                        request->client->secret) < 0) {
2518                 RDEBUG("Failed signing packet: %s", fr_strerror());
2519                 return 0;
2520         }
2521
2522         PTHREAD_MUTEX_LOCK(&sock->mutex);
2523         /*
2524          *      Write the packet to the SSL buffers.
2525          */
2526         record_plus(&sock->ssn->clean_in,
2527                     request->reply->data, request->reply->data_len);
2528
2529         /*
2530          *      Do SSL magic to get encrypted data.
2531          */
2532         tls_handshake_send(request, sock->ssn);
2533
2534         /*
2535          *      And finally write the data to the socket.
2536          */
2537         if (sock->ssn->dirty_out.used > 0) {
2538                 dump_hex("WRITE TO SSL", sock->ssn->dirty_out.data, sock->ssn->dirty_out.used);
2539
2540                 tls_socket_write(listener, request);
2541         }
2542         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
2543
2544         return 0;
2545 }
2546
2547
2548 int proxy_tls_recv(rad_listen_t *listener)
2549 {
2550         int rcode;
2551         size_t length;
2552         listen_socket_t *sock = listener->data;
2553         char buffer[256];
2554         uint8_t data[1024];
2555         RADIUS_PACKET *packet;
2556         RAD_REQUEST_FUNP fun = NULL;
2557
2558         DEBUG3("Proxy SSL socket has data to read");
2559         PTHREAD_MUTEX_LOCK(&sock->mutex);
2560 redo:
2561         rcode = SSL_read(sock->ssn->ssl, data, 4);
2562         if (rcode <= 0) {
2563                 int err = SSL_get_error(sock->ssn->ssl, rcode);
2564                 switch (err) {
2565                 case SSL_ERROR_WANT_READ:
2566                 case SSL_ERROR_WANT_WRITE:
2567                         rcode = 0;
2568                         goto redo;
2569                 case SSL_ERROR_ZERO_RETURN:
2570                         /* remote end sent close_notify, send one back */
2571                         SSL_shutdown(sock->ssn->ssl);
2572
2573                 case SSL_ERROR_SYSCALL:
2574                 do_close:
2575                         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
2576                         tls_socket_close(listener);
2577                         return 0;
2578
2579                 default:
2580                         while ((err = ERR_get_error())) {
2581                                 DEBUG("proxy recv says %s",
2582                                       ERR_error_string(err, NULL));
2583                         }
2584
2585                         goto do_close;
2586                 }
2587         }
2588
2589         length = (data[2] << 8) | data[3];
2590         DEBUG3("Proxy received header saying we have a packet of %u bytes",
2591                (unsigned int) length);
2592
2593         if (length > sizeof(data)) {
2594                 DEBUG("Received packet will be too large! (%u)",
2595                       (data[2] << 8) | data[3]);
2596                 goto do_close;
2597         }
2598
2599         rcode = SSL_read(sock->ssn->ssl, data + 4, length);
2600         if (rcode <= 0) {
2601                 switch (SSL_get_error(sock->ssn->ssl, rcode)) {
2602                 case SSL_ERROR_WANT_READ:
2603                 case SSL_ERROR_WANT_WRITE:
2604                         rcode = 0;
2605                         break;
2606
2607                 case SSL_ERROR_ZERO_RETURN:
2608                         /* remote end sent close_notify, send one back */
2609                         SSL_shutdown(sock->ssn->ssl);
2610                         goto do_close;
2611                 default:
2612                         goto do_close;
2613                 }
2614         }
2615         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
2616
2617         packet = rad_alloc(0);
2618         packet->sockfd = listener->fd;
2619         packet->src_ipaddr = sock->other_ipaddr;
2620         packet->src_port = sock->other_port;
2621         packet->dst_ipaddr = sock->my_ipaddr;
2622         packet->dst_port = sock->my_port;
2623         packet->code = data[0];
2624         packet->id = data[1];
2625         packet->data_len = length;
2626         packet->data = rad_malloc(packet->data_len);
2627         memcpy(packet->data, data, packet->data_len);
2628         memcpy(packet->vector, packet->data + 4, 16);
2629
2630         /*
2631          *      FIXME: Client MIB updates?
2632          */
2633         switch(packet->code) {
2634         case PW_AUTHENTICATION_ACK:
2635         case PW_ACCESS_CHALLENGE:
2636         case PW_AUTHENTICATION_REJECT:
2637                 fun = rad_authenticate;
2638                 break;
2639
2640 #ifdef WITH_ACCOUNTING
2641         case PW_ACCOUNTING_RESPONSE:
2642                 fun = rad_accounting;
2643                 break;
2644 #endif
2645
2646         default:
2647                 /*
2648                  *      FIXME: Update MIB for packet types?
2649                  */
2650                 radlog(L_ERR, "Invalid packet code %d sent to a proxy port "
2651                        "from home server %s port %d - ID %d : IGNORED",
2652                        packet->code,
2653                        ip_ntoh(&packet->src_ipaddr, buffer, sizeof(buffer)),
2654                        packet->src_port, packet->id);
2655                 rad_free(&packet);
2656                 return 0;
2657         }
2658
2659         if (!request_proxy_reply(packet)) {
2660                 rad_free(&packet);
2661                 return 0;
2662         }
2663
2664         return 1;
2665 }
2666
2667 int proxy_tls_send(rad_listen_t *listener, REQUEST *request)
2668 {
2669         int rcode;
2670         listen_socket_t *sock = listener->data;
2671
2672         /*
2673          *      Normal proxying calls us with the data already
2674          *      encoded.  The "ping home server" code does not.  So,
2675          *      if there's no packet, encode it here.
2676          */
2677         if (!request->proxy->data) {
2678                 request->proxy_listener->encode(request->proxy_listener,
2679                                                 request);
2680         }
2681
2682         DEBUG3("Proxy is writing %u bytes to SSL",
2683                (unsigned int) request->proxy->data_len);
2684         PTHREAD_MUTEX_LOCK(&sock->mutex);
2685         while ((rcode = SSL_write(sock->ssn->ssl, request->proxy->data,
2686                                   request->proxy->data_len)) < 0) {
2687                 int err;
2688                 while ((err = ERR_get_error())) {
2689                         DEBUG("proxy SSL_write says %s",
2690                               ERR_error_string(err, NULL));
2691                 }
2692                 PTHREAD_MUTEX_UNLOCK(&sock->mutex);
2693                 tls_socket_close(listener);
2694                 return 0;
2695         }
2696         PTHREAD_MUTEX_UNLOCK(&sock->mutex);
2697
2698         return 1;
2699 }
2700
2701 #endif  /* WITH_TLS */