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 RCSID("$Id$")
  26 USES_APPLE_DEPRECATED_API       /* OpenSSL API has been deprecated by Apple */
  27
  28 #include <freeradius-devel/radiusd.h>
  29 #include <freeradius-devel/process.h>
  30 #include <freeradius-devel/rad_assert.h>
  31
  32 #ifdef HAVE_SYS_STAT_H
  33 #include <sys/stat.h>
  34 #endif
  35
  36 #ifdef HAVE_FCNTL_H
  37 #include <fcntl.h>
  38 #endif
  39
  40 #ifdef HAVE_UTIME_H
  41 #include <utime.h>
  42 #endif
  43 #include <ctype.h>
  44
  45 #ifdef WITH_TLS
  46 #ifdef HAVE_OPENSSL_RAND_H
  47 #include <openssl/rand.h>
  48 #endif
  49
  50 #ifdef HAVE_OPENSSL_OCSP_H
  51 #include <openssl/ocsp.h>
  52 #endif
  53
  54 #ifdef ENABLE_OPENSSL_VERSION_CHECK
  55 typedef struct libssl_defect {
  56         uint64_t        high;
  57         uint64_t        low;
  58
  59         char const      *id;
  60         char const      *name;
  61         char const      *comment;
  62 } libssl_defect_t;
  63
  64 /* Record critical defects in libssl here (newest first)*/
  65 static libssl_defect_t libssl_defects[] =
  66 {
  67         {
  68                 .low            = 0x010001000,          /* 1.0.1  */
  69                 .high           = 0x01000106f,          /* 1.0.1f */
  70                 .id             = "CVE-2014-0160",
  71                 .name           = "Heartbleed",
  72                 .comment        = "For more information see http://heartbleed.com"
  73         }
  74 };
  75 #endif
  76
  77 /* index we use to store cached session VPs
  78  * needs to be dynamic so we can supply a "free" function
  79  */
  80 static int fr_tls_ex_index_vps = -1;
  81 int fr_tls_ex_index_certs = -1;
  82
  83 /* record */
  84 static void             record_init(record_t *buf);
  85 static void             record_close(record_t *buf);
  86 static unsigned int     record_plus(record_t *buf, void const *ptr,
  87                                     unsigned int size);
  88 static unsigned int     record_minus(record_t *buf, void *ptr,
  89                                      unsigned int size);
  90
  91 #ifdef PSK_MAX_IDENTITY_LEN
  92 static bool identity_is_safe(const char *identity)
  93 {
  94         char c;
  95
  96         if (!identity) return true;
  97
  98         while ((c = *(identity++)) != '\0') {
  99                 if (isalpha((int) c) || isdigit((int) c) || isspace((int) c) ||
 100                     (c == '@') || (c == '-') || (c == '_') || (c == '.')) {
 101                         continue;
 102                 }
 103
 104                 return false;
 105         }
 106
 107         return true;
 108 }
 109
 110
 111 /*
 112  *      When a client uses TLS-PSK to talk to a server, this callback
 113  *      is used by the server to determine the PSK to use.
 114  */
 115 static unsigned int psk_server_callback(SSL *ssl, const char *identity,
 116                                         unsigned char *psk,
 117                                         unsigned int max_psk_len)
 118 {
 119         unsigned int psk_len = 0;
 120         fr_tls_server_conf_t *conf;
 121         REQUEST *request;
 122
 123         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl,
 124                                                        FR_TLS_EX_INDEX_CONF);
 125         if (!conf) return 0;
 126
 127         request = (REQUEST *)SSL_get_ex_data(ssl,
 128                                              FR_TLS_EX_INDEX_REQUEST);
 129         if (request && conf->psk_query) {
 130                 size_t hex_len;
 131                 VALUE_PAIR *vp;
 132                 char buffer[2 * PSK_MAX_PSK_LEN + 4]; /* allow for too-long keys */
 133
 134                 /*
 135                  *      The passed identity is weird.  Deny it.
 136                  */
 137                 if (!identity_is_safe(identity)) {
 138                         RWDEBUG("Invalid characters in PSK identity %s", identity);
 139                         return 0;
 140                 }
 141
 142                 vp = pairmake_packet("TLS-PSK-Identity", identity, T_OP_SET);
 143                 if (!vp) return 0;
 144
 145                 hex_len = radius_xlat(buffer, sizeof(buffer), request, conf->psk_query,
 146                                       NULL, NULL);
 147                 if (!hex_len) {
 148                         RWDEBUG("PSK expansion returned an empty string.");
 149                         return 0;
 150                 }
 151
 152                 /*
 153                  *      The returned key is truncated at MORE than
 154                  *      OpenSSL can handle.  That way we can detect
 155                  *      the truncation, and complain about it.
 156                  */
 157                 if (hex_len > (2 * max_psk_len)) {
 158                         RWDEBUG("Returned PSK is too long (%u > %u)",
 159                                 (unsigned int) hex_len, 2 * max_psk_len);
 160                         return 0;
 161                 }
 162
 163                 /*
 164                  *      Leave the TLS-PSK-Identity in the request, and
 165                  *      convert the expansion from printable string
 166                  *      back to hex.
 167                  */
 168                 return fr_hex2bin(psk, max_psk_len, buffer, hex_len);
 169         }
 170
 171         if (!conf->psk_identity) {
 172                 DEBUG("No static PSK identity set.  Rejecting the user");
 173                 return 0;
 174         }
 175
 176         /*
 177          *      No REQUEST, or no dynamic query.  Just look for a
 178          *      static identity.
 179          */
 180         if (strcmp(identity, conf->psk_identity) != 0) {
 181                 ERROR("Supplied PSK identity %s does not match configuration.  Rejecting.",
 182                       identity);
 183                 return 0;
 184         }
 185
 186         psk_len = strlen(conf->psk_password);
 187         if (psk_len > (2 * max_psk_len)) return 0;
 188
 189         return fr_hex2bin(psk, max_psk_len, conf->psk_password, psk_len);
 190 }
 191
 192 static unsigned int psk_client_callback(SSL *ssl, UNUSED char const *hint,
 193                                         char *identity, unsigned int max_identity_len,
 194                                         unsigned char *psk, unsigned int max_psk_len)
 195 {
 196         unsigned int psk_len;
 197         fr_tls_server_conf_t *conf;
 198
 199         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl,
 200                                                        FR_TLS_EX_INDEX_CONF);
 201         if (!conf) return 0;
 202
 203         psk_len = strlen(conf->psk_password);
 204         if (psk_len > (2 * max_psk_len)) return 0;
 205
 206         strlcpy(identity, conf->psk_identity, max_identity_len);
 207
 208         return fr_hex2bin(psk, max_psk_len, conf->psk_password, psk_len);
 209 }
 210
 211 #endif
 212
 213 tls_session_t *tls_new_client_session(fr_tls_server_conf_t *conf, int fd)
 214 {
 215         int verify_mode;
 216         tls_session_t *ssn = NULL;
 217         REQUEST *request;
 218
 219         ssn = talloc_zero(conf, tls_session_t);
 220         if (!ssn) return NULL;
 221
 222         ssn->ctx = conf->ctx;
 223
 224         SSL_CTX_set_mode(ssn->ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER | SSL_MODE_AUTO_RETRY);
 225
 226         ssn->ssl = SSL_new(ssn->ctx);
 227         if (!ssn->ssl) {
 228                 talloc_free(ssn);
 229                 return NULL;
 230         }
 231
 232         request = request_alloc(ssn);
 233         SSL_set_ex_data(ssn->ssl, FR_TLS_EX_INDEX_REQUEST, (void *)request);
 234
 235         /*
 236          *      Add the message callback to identify what type of
 237          *      message/handshake is passed
 238          */
 239         SSL_set_msg_callback(ssn->ssl, cbtls_msg);
 240         SSL_set_msg_callback_arg(ssn->ssl, ssn);
 241         SSL_set_info_callback(ssn->ssl, cbtls_info);
 242
 243         /*
 244          *      Always verify the peer certificate.
 245          */
 246         DEBUG2("Requiring Server certificate");
 247         verify_mode = SSL_VERIFY_PEER;
 248         verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
 249         SSL_set_verify(ssn->ssl, verify_mode, cbtls_verify);
 250
 251         SSL_set_ex_data(ssn->ssl, FR_TLS_EX_INDEX_CONF, (void *)conf);
 252         SSL_set_ex_data(ssn->ssl, FR_TLS_EX_INDEX_SSN, (void *)ssn);
 253         SSL_set_fd(ssn->ssl, fd);
 254         if (SSL_connect(ssn->ssl) <= 0) {
 255                 int err;
 256                 while ((err = ERR_get_error())) {
 257                         ERROR("tls: %s", ERR_error_string(err, NULL));
 258                 }
 259                 SSL_free(ssn->ssl);
 260                 talloc_free(ssn);
 261
 262                 return NULL;
 263         }
 264
 265         ssn->offset = conf->fragment_size;
 266
 267         return ssn;
 268 }
 269
 270 static int _tls_session_free(tls_session_t *ssn)
 271 {
 272         /*
 273          *      Free any opaque TTLS or PEAP data.
 274          */
 275         if ((ssn->opaque) && (ssn->free_opaque)) {
 276                 ssn->free_opaque(ssn->opaque);
 277                 ssn->opaque = NULL;
 278         }
 279
 280         session_close(ssn);
 281
 282         return 0;
 283 }
 284
 285 tls_session_t *tls_new_session(TALLOC_CTX *ctx, fr_tls_server_conf_t *conf, REQUEST *request, bool client_cert)
 286 {
 287         tls_session_t *state = NULL;
 288         SSL *new_tls = NULL;
 289         int             verify_mode = 0;
 290         VALUE_PAIR      *vp;
 291
 292         rad_assert(request != NULL);
 293
 294         /*
 295          *      Manually flush the sessions every so often.  If HALF
 296          *      of the session lifetime has passed since we last
 297          *      flushed, then flush it again.
 298          *
 299          *      FIXME: Also do it every N sessions?
 300          */
 301         if (conf->session_cache_enable &&
 302             ((conf->session_last_flushed + ((int)conf->session_timeout * 1800)) <= request->timestamp)){
 303                 RDEBUG2("Flushing SSL sessions (of #%ld)",
 304                         SSL_CTX_sess_number(conf->ctx));
 305
 306                 SSL_CTX_flush_sessions(conf->ctx, request->timestamp);
 307                 conf->session_last_flushed = request->timestamp;
 308         }
 309
 310         if ((new_tls = SSL_new(conf->ctx)) == NULL) {
 311                 ERROR("SSL: Error creating new SSL: %s",
 312                        ERR_error_string(ERR_get_error(), NULL));
 313                 return NULL;
 314         }
 315
 316         /* We use the SSL's "app_data" to indicate a call-back */
 317         SSL_set_app_data(new_tls, NULL);
 318
 319         if ((state = talloc_zero(ctx, tls_session_t)) == NULL) {
 320                 ERROR("SSL: Error allocating memory for SSL state");
 321                 return NULL;
 322         }
 323         session_init(state);
 324         talloc_set_destructor(state, _tls_session_free);
 325
 326         state->ctx = conf->ctx;
 327         state->ssl = new_tls;
 328
 329         /*
 330          *      Initialize callbacks
 331          */
 332         state->record_init = record_init;
 333         state->record_close = record_close;
 334         state->record_plus = record_plus;
 335         state->record_minus = record_minus;
 336
 337         /*
 338          *      Create & hook the BIOs to handle the dirty side of the
 339          *      SSL.  This is *very important* as we want to handle
 340          *      the transmission part.  Now the only IO interface
 341          *      that SSL is aware of, is our defined BIO buffers.
 342          *
 343          *      This means that all SSL IO is done to/from memory,
 344          *      and we can update those BIOs from the packets we've
 345          *      received.
 346          */
 347         state->into_ssl = BIO_new(BIO_s_mem());
 348         state->from_ssl = BIO_new(BIO_s_mem());
 349         SSL_set_bio(state->ssl, state->into_ssl, state->from_ssl);
 350
 351         /*
 352          *      Add the message callback to identify what type of
 353          *      message/handshake is passed
 354          */
 355         SSL_set_msg_callback(new_tls, cbtls_msg);
 356         SSL_set_msg_callback_arg(new_tls, state);
 357         SSL_set_info_callback(new_tls, cbtls_info);
 358
 359         /*
 360          *      In Server mode we only accept.
 361          */
 362         SSL_set_accept_state(state->ssl);
 363
 364         /*
 365          *      Verify the peer certificate, if asked.
 366          */
 367         if (client_cert) {
 368                 RDEBUG2("Requiring client certificate");
 369                 verify_mode = SSL_VERIFY_PEER;
 370                 verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
 371                 verify_mode |= SSL_VERIFY_CLIENT_ONCE;
 372         }
 373         SSL_set_verify(state->ssl, verify_mode, cbtls_verify);
 374
 375         SSL_set_ex_data(state->ssl, FR_TLS_EX_INDEX_CONF, (void *)conf);
 376         SSL_set_ex_data(state->ssl, FR_TLS_EX_INDEX_SSN, (void *)state);
 377         state->length_flag = conf->include_length;
 378
 379         /*
 380          *      We use default fragment size, unless the Framed-MTU
 381          *      tells us it's too big.  Note that we do NOT account
 382          *      for the EAP-TLS headers if conf->fragment_size is
 383          *      large, because that config item looks to be confusing.
 384          *
 385          *      i.e. it should REALLY be called MTU, and the code here
 386          *      should figure out what that means for TLS fragment size.
 387          *      asking the administrator to know the internal details
 388          *      of EAP-TLS in order to calculate fragment sizes is
 389          *      just too much.
 390          */
 391         state->offset = conf->fragment_size;
 392         vp = pairfind(request->packet->vps, PW_FRAMED_MTU, 0, TAG_ANY);
 393         if (vp && (vp->vp_integer > 100) && (vp->vp_integer < state->offset)) {
 394                 state->offset = vp->vp_integer;
 395         }
 396
 397         if (conf->session_cache_enable) state->allow_session_resumption = true; /* otherwise it's false */
 398
 399         RDEBUG2("Initiate");
 400
 401         return state;
 402 }
 403
 404 /*
 405  *      Print out some text describing the error.
 406  */
 407 static int int_ssl_check(REQUEST *request, SSL *s, int ret, char const *text)
 408 {
 409         int e;
 410         unsigned long l;
 411
 412         if ((l = ERR_get_error()) != 0) {
 413                 char const *p = ERR_error_string(l, NULL);
 414
 415                 if (request && p) REDEBUG("SSL says: %s", p);
 416         }
 417         e = SSL_get_error(s, ret);
 418
 419         switch (e) {
 420                 /*
 421                  *      These seem to be harmless and already "dealt
 422                  *      with" by our non-blocking environment. NB:
 423                  *      "ZERO_RETURN" is the clean "error"
 424                  *      indicating a successfully closed SSL
 425                  *      tunnel. We let this happen because our IO
 426                  *      loop should not appear to have broken on
 427                  *      this condition - and outside the IO loop, the
 428                  *      "shutdown" state is checked.
 429                  *
 430                  *      Don't print anything if we ignore the error.
 431                  */
 432         case SSL_ERROR_NONE:
 433         case SSL_ERROR_WANT_READ:
 434         case SSL_ERROR_WANT_WRITE:
 435         case SSL_ERROR_WANT_X509_LOOKUP:
 436         case SSL_ERROR_ZERO_RETURN:
 437                 break;
 438
 439                 /*
 440                  *      These seem to be indications of a genuine
 441                  *      error that should result in the SSL tunnel
 442                  *      being regarded as "dead".
 443                  */
 444         case SSL_ERROR_SYSCALL:
 445                 ERROR("SSL: %s failed in a system call (%d), TLS session fails.",
 446                        text, ret);
 447                 return 0;
 448
 449         case SSL_ERROR_SSL:
 450                 ERROR("SSL: %s failed inside of TLS (%d), TLS session fails.",
 451                        text, ret);
 452                 return 0;
 453
 454         default:
 455                 /*
 456                  *      For any other errors that (a) exist, and (b)
 457                  *      crop up - we need to interpret what to do with
 458                  *      them - so "politely inform" the caller that
 459                  *      the code needs updating here.
 460                  */
 461                 ERROR("SSL: FATAL SSL error ..... %d\n", e);
 462                 return 0;
 463         }
 464
 465         return 1;
 466 }
 467
 468 /*
 469  * We are the server, we always get the dirty data
 470  * (Handshake data is also considered as dirty data)
 471  * During handshake, since SSL API handles itself,
 472  * After clean-up, dirty_out will be filled with
 473  * the data required for handshaking. So we check
 474  * if dirty_out is empty then we simply send it back.
 475  * As of now, if handshake is successful, then we keep going,
 476  * otherwise we fail.
 477  *
 478  * Fill the Bio with the dirty data to clean it
 479  * Get the cleaned data from SSL, if it is not Handshake data
 480  */
 481 int tls_handshake_recv(REQUEST *request, tls_session_t *ssn)
 482 {
 483         int err;
 484
 485         if (ssn->invalid_hb_used) return 0;
 486
 487         err = BIO_write(ssn->into_ssl, ssn->dirty_in.data, ssn->dirty_in.used);
 488         if (err != (int) ssn->dirty_in.used) {
 489                 RDEBUG("Failed writing %d to SSL BIO: %d", ssn->dirty_in.used,
 490                         err);
 491                 record_init(&ssn->dirty_in);
 492                 return 0;
 493         }
 494         record_init(&ssn->dirty_in);
 495
 496         err = SSL_read(ssn->ssl, ssn->clean_out.data + ssn->clean_out.used,
 497                        sizeof(ssn->clean_out.data) - ssn->clean_out.used);
 498         if (err > 0) {
 499                 ssn->clean_out.used += err;
 500                 return 1;
 501         }
 502
 503         if (!int_ssl_check(request, ssn->ssl, err, "SSL_read")) {
 504                 return 0;
 505         }
 506
 507         /* Some Extra STATE information for easy debugging */
 508         if (SSL_is_init_finished(ssn->ssl)) {
 509                 DEBUG2("SSL Connection Established\n");
 510         }
 511         if (SSL_in_init(ssn->ssl)) {
 512                 DEBUG2("In SSL Handshake Phase\n");
 513         }
 514         if (SSL_in_before(ssn->ssl)) {
 515                 DEBUG2("Before SSL Handshake Phase\n");
 516         }
 517         if (SSL_in_accept_init(ssn->ssl)) {
 518                 DEBUG2("In SSL Accept mode \n");
 519         }
 520         if (SSL_in_connect_init(ssn->ssl)) {
 521                 DEBUG2("In SSL Connect mode \n");
 522         }
 523
 524         err = BIO_ctrl_pending(ssn->from_ssl);
 525         if (err > 0) {
 526                 err = BIO_read(ssn->from_ssl, ssn->dirty_out.data,
 527                                sizeof(ssn->dirty_out.data));
 528                 if (err > 0) {
 529                         ssn->dirty_out.used = err;
 530
 531                 } else if (BIO_should_retry(ssn->from_ssl)) {
 532                         record_init(&ssn->dirty_in);
 533                         DEBUG2("  tls: Asking for more data in tunnel");
 534                         return 1;
 535
 536                 } else {
 537                         int_ssl_check(request, ssn->ssl, err, "BIO_read");
 538                         record_init(&ssn->dirty_in);
 539                         return 0;
 540                 }
 541         } else {
 542                 DEBUG2("SSL Application Data");
 543                 /* Its clean application data, do whatever we want */
 544                 record_init(&ssn->clean_out);
 545         }
 546
 547         /* We are done with dirty_in, reinitialize it */
 548         record_init(&ssn->dirty_in);
 549         return 1;
 550 }
 551
 552 /*
 553  *      Take cleartext user data, and encrypt it into the output buffer,
 554  *      to send to the client at the other end of the SSL connection.
 555  */
 556 int tls_handshake_send(REQUEST *request, tls_session_t *ssn)
 557 {
 558         int err;
 559
 560         /*
 561          *      If there's un-encrypted data in 'clean_in', then write
 562          *      that data to the SSL session, and then call the BIO function
 563          *      to get that encrypted data from the SSL session, into
 564          *      a buffer which we can then package into an EAP packet.
 565          *
 566          *      Based on Server's logic this clean_in is expected to
 567          *      contain the data to send to the client.
 568          */
 569         if (ssn->clean_in.used > 0) {
 570                 int written;
 571
 572                 written = SSL_write(ssn->ssl, ssn->clean_in.data, ssn->clean_in.used);
 573                 record_minus(&ssn->clean_in, NULL, written);
 574
 575                 /* Get the dirty data from Bio to send it */
 576                 err = BIO_read(ssn->from_ssl, ssn->dirty_out.data,
 577                                sizeof(ssn->dirty_out.data));
 578                 if (err > 0) {
 579                         ssn->dirty_out.used = err;
 580                 } else {
 581                         int_ssl_check(request, ssn->ssl, err, "handshake_send");
 582                 }
 583         }
 584
 585         return 1;
 586 }
 587
 588 void session_init(tls_session_t *ssn)
 589 {
 590         ssn->ssl = NULL;
 591         ssn->into_ssl = ssn->from_ssl = NULL;
 592         record_init(&ssn->clean_in);
 593         record_init(&ssn->clean_out);
 594         record_init(&ssn->dirty_in);
 595         record_init(&ssn->dirty_out);
 596
 597         memset(&ssn->info, 0, sizeof(ssn->info));
 598
 599         ssn->offset = 0;
 600         ssn->fragment = 0;
 601         ssn->tls_msg_len = 0;
 602         ssn->length_flag = 0;
 603         ssn->opaque = NULL;
 604         ssn->free_opaque = NULL;
 605 }
 606
 607 void session_close(tls_session_t *ssn)
 608 {
 609         SSL_set_quiet_shutdown(ssn->ssl, 1);
 610         SSL_shutdown(ssn->ssl);
 611
 612         if (ssn->ssl) {
 613                 SSL_free(ssn->ssl);
 614                 ssn->ssl = NULL;
 615         }
 616
 617         record_close(&ssn->clean_in);
 618         record_close(&ssn->clean_out);
 619         record_close(&ssn->dirty_in);
 620         record_close(&ssn->dirty_out);
 621         session_init(ssn);
 622 }
 623
 624 static void record_init(record_t *rec)
 625 {
 626         rec->used = 0;
 627 }
 628
 629 static void record_close(record_t *rec)
 630 {
 631         rec->used = 0;
 632 }
 633
 634
 635 /*
 636  *      Copy data to the intermediate buffer, before we send
 637  *      it somewhere.
 638  */
 639 static unsigned int record_plus(record_t *rec, void const *ptr,
 640                                 unsigned int size)
 641 {
 642         unsigned int added = MAX_RECORD_SIZE - rec->used;
 643
 644         if(added > size)
 645                 added = size;
 646         if(added == 0)
 647                 return 0;
 648         memcpy(rec->data + rec->used, ptr, added);
 649         rec->used += added;
 650         return added;
 651 }
 652
 653 /*
 654  *      Take data from the buffer, and give it to the caller.
 655  */
 656 static unsigned int record_minus(record_t *rec, void *ptr,
 657                                  unsigned int size)
 658 {
 659         unsigned int taken = rec->used;
 660
 661         if(taken > size)
 662                 taken = size;
 663         if(taken == 0)
 664                 return 0;
 665         if(ptr)
 666                 memcpy(ptr, rec->data, taken);
 667         rec->used -= taken;
 668
 669         /*
 670          *      This is pretty bad...
 671          */
 672         if(rec->used > 0)
 673                 memmove(rec->data, rec->data + taken, rec->used);
 674         return taken;
 675 }
 676
 677 void tls_session_information(tls_session_t *tls_session)
 678 {
 679         char const *str_write_p, *str_version, *str_content_type = "";
 680         char const *str_details1 = "", *str_details2= "";
 681         REQUEST *request;
 682
 683         /*
 684          *      Don't print this out in the normal course of
 685          *      operations.
 686          */
 687         if (debug_flag == 0) {
 688                 return;
 689         }
 690
 691         str_write_p = tls_session->info.origin ? ">>>" : "<<<";
 692
 693         switch (tls_session->info.version) {
 694         case SSL2_VERSION:
 695                 str_version = "SSL 2.0";
 696                 break;
 697         case SSL3_VERSION:
 698                 str_version = "SSL 3.0 ";
 699                 break;
 700         case TLS1_VERSION:
 701                 str_version = "TLS 1.0 ";
 702                 break;
 703         default:
 704                 str_version = "Unknown TLS version";
 705                 break;
 706         }
 707
 708         if (tls_session->info.version == SSL3_VERSION ||
 709             tls_session->info.version == TLS1_VERSION) {
 710                 switch (tls_session->info.content_type) {
 711                 case SSL3_RT_CHANGE_CIPHER_SPEC:
 712                         str_content_type = "ChangeCipherSpec";
 713                         break;
 714
 715                 case SSL3_RT_ALERT:
 716                         str_content_type = "Alert";
 717                         break;
 718
 719                 case SSL3_RT_HANDSHAKE:
 720                         str_content_type = "Handshake";
 721                         break;
 722
 723                 case SSL3_RT_APPLICATION_DATA:
 724                         str_content_type = "ApplicationData";
 725                         break;
 726
 727                 default:
 728                         str_content_type = "UnknownContentType";
 729                         break;
 730                 }
 731
 732                 if (tls_session->info.content_type == SSL3_RT_ALERT) {
 733                         str_details1 = ", ???";
 734
 735                         if (tls_session->info.record_len == 2) {
 736
 737                                 switch (tls_session->info.alert_level) {
 738                                 case SSL3_AL_WARNING:
 739                                         str_details1 = ", warning";
 740                                         break;
 741                                 case SSL3_AL_FATAL:
 742                                         str_details1 = ", fatal";
 743                                         break;
 744                                 }
 745
 746                                 str_details2 = " ???";
 747                                 switch (tls_session->info.alert_description) {
 748                                 case SSL3_AD_CLOSE_NOTIFY:
 749                                         str_details2 = " close_notify";
 750                                         break;
 751
 752                                 case SSL3_AD_UNEXPECTED_MESSAGE:
 753                                         str_details2 = " unexpected_message";
 754                                         break;
 755
 756                                 case SSL3_AD_BAD_RECORD_MAC:
 757                                         str_details2 = " bad_record_mac";
 758                                         break;
 759
 760                                 case TLS1_AD_DECRYPTION_FAILED:
 761                                         str_details2 = " decryption_failed";
 762                                         break;
 763
 764                                 case TLS1_AD_RECORD_OVERFLOW:
 765                                         str_details2 = " record_overflow";
 766                                         break;
 767
 768                                 case SSL3_AD_DECOMPRESSION_FAILURE:
 769                                         str_details2 = " decompression_failure";
 770                                         break;
 771
 772                                 case SSL3_AD_HANDSHAKE_FAILURE:
 773                                         str_details2 = " handshake_failure";
 774                                         break;
 775
 776                                 case SSL3_AD_BAD_CERTIFICATE:
 777                                         str_details2 = " bad_certificate";
 778                                         break;
 779
 780                                 case SSL3_AD_UNSUPPORTED_CERTIFICATE:
 781                                         str_details2 = " unsupported_certificate";
 782                                         break;
 783
 784                                 case SSL3_AD_CERTIFICATE_REVOKED:
 785                                         str_details2 = " certificate_revoked";
 786                                         break;
 787
 788                                 case SSL3_AD_CERTIFICATE_EXPIRED:
 789                                         str_details2 = " certificate_expired";
 790                                         break;
 791
 792                                 case SSL3_AD_CERTIFICATE_UNKNOWN:
 793                                         str_details2 = " certificate_unknown";
 794                                         break;
 795
 796                                 case SSL3_AD_ILLEGAL_PARAMETER:
 797                                         str_details2 = " illegal_parameter";
 798                                         break;
 799
 800                                 case TLS1_AD_UNKNOWN_CA:
 801                                         str_details2 = " unknown_ca";
 802                                         break;
 803
 804                                 case TLS1_AD_ACCESS_DENIED:
 805                                         str_details2 = " access_denied";
 806                                         break;
 807
 808                                 case TLS1_AD_DECODE_ERROR:
 809                                         str_details2 = " decode_error";
 810                                         break;
 811
 812                                 case TLS1_AD_DECRYPT_ERROR:
 813                                         str_details2 = " decrypt_error";
 814                                         break;
 815
 816                                 case TLS1_AD_EXPORT_RESTRICTION:
 817                                         str_details2 = " export_restriction";
 818                                         break;
 819
 820                                 case TLS1_AD_PROTOCOL_VERSION:
 821                                         str_details2 = " protocol_version";
 822                                         break;
 823
 824                                 case TLS1_AD_INSUFFICIENT_SECURITY:
 825                                         str_details2 = " insufficient_security";
 826                                         break;
 827
 828                                 case TLS1_AD_INTERNAL_ERROR:
 829                                         str_details2 = " internal_error";
 830                                         break;
 831
 832                                 case TLS1_AD_USER_CANCELLED:
 833                                         str_details2 = " user_canceled";
 834                                         break;
 835
 836                                 case TLS1_AD_NO_RENEGOTIATION:
 837                                         str_details2 = " no_renegotiation";
 838                                         break;
 839                                 }
 840                         }
 841                 }
 842
 843                 if (tls_session->info.content_type == SSL3_RT_HANDSHAKE) {
 844                         str_details1 = "???";
 845
 846                         if (tls_session->info.record_len > 0) switch (tls_session->info.handshake_type) {
 847                         case SSL3_MT_HELLO_REQUEST:
 848                                 str_details1 = ", HelloRequest";
 849                                 break;
 850
 851                         case SSL3_MT_CLIENT_HELLO:
 852                                 str_details1 = ", ClientHello";
 853                                 break;
 854
 855                         case SSL3_MT_SERVER_HELLO:
 856                                 str_details1 = ", ServerHello";
 857                                 break;
 858
 859                         case SSL3_MT_CERTIFICATE:
 860                                 str_details1 = ", Certificate";
 861                                 break;
 862
 863                         case SSL3_MT_SERVER_KEY_EXCHANGE:
 864                                 str_details1 = ", ServerKeyExchange";
 865                                 break;
 866
 867                         case SSL3_MT_CERTIFICATE_REQUEST:
 868                                 str_details1 = ", CertificateRequest";
 869                                 break;
 870
 871                         case SSL3_MT_SERVER_DONE:
 872                                 str_details1 = ", ServerHelloDone";
 873                                 break;
 874
 875                         case SSL3_MT_CERTIFICATE_VERIFY:
 876                                 str_details1 = ", CertificateVerify";
 877                                 break;
 878
 879                         case SSL3_MT_CLIENT_KEY_EXCHANGE:
 880                                 str_details1 = ", ClientKeyExchange";
 881                                 break;
 882
 883                         case SSL3_MT_FINISHED:
 884                                 str_details1 = ", Finished";
 885                                 break;
 886                         }
 887                 }
 888         }
 889
 890         snprintf(tls_session->info.info_description,
 891                  sizeof(tls_session->info.info_description),
 892                  "%s %s%s [length %04lx]%s%s\n",
 893                  str_write_p, str_version, str_content_type,
 894                  (unsigned long)tls_session->info.record_len,
 895                  str_details1, str_details2);
 896
 897         request = SSL_get_ex_data(tls_session->ssl, FR_TLS_EX_INDEX_REQUEST);
 898         if (request) {
 899                 RDEBUG2("%s", tls_session->info.info_description);
 900         } else {
 901                 DEBUG2("%s", tls_session->info.info_description);
 902         }
 903 }
 904
 905 static CONF_PARSER cache_config[] = {
 906         { "enable", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, session_cache_enable), "no" },
 907         { "lifetime", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, session_timeout), "24" },
 908         { "max_entries", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, session_cache_size), "255" },
 909         { "name", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, session_id_name), NULL },
 910         { "persist_dir", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, session_cache_path), NULL },
 911         { NULL, -1, 0, NULL, NULL }        /* end the list */
 912 };
 913
 914 static CONF_PARSER verify_config[] = {
 915         { "tmpdir", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, verify_tmp_dir), NULL },
 916         { "client", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, verify_client_cert_cmd), NULL },
 917         { NULL, -1, 0, NULL, NULL }        /* end the list */
 918 };
 919
 920 #ifdef HAVE_OPENSSL_OCSP_H
 921 static CONF_PARSER ocsp_config[] = {
 922         { "enable", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, ocsp_enable), "no" },
 923         { "override_cert_url", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, ocsp_override_url), "no" },
 924         { "url", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, ocsp_url), NULL },
 925         { "use_nonce", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, ocsp_use_nonce), "yes" },
 926         { "timeout", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, ocsp_timeout), "yes" },
 927         { "softfail", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, ocsp_softfail), "no" },
 928         { NULL, -1, 0, NULL, NULL }        /* end the list */
 929 };
 930 #endif
 931
 932 static CONF_PARSER tls_server_config[] = {
 933         { "rsa_key_exchange", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, rsa_key), "no" },
 934         { "dh_key_exchange", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, dh_key), "yes" },
 935         { "rsa_key_length", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, rsa_key_length), "512" },
 936         { "dh_key_length", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, dh_key_length), "512" },
 937         { "verify_depth", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, verify_depth), "0" },
 938         { "CA_path", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT | PW_TYPE_DEPRECATED, fr_tls_server_conf_t, ca_path), NULL },
 939         { "ca_path", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_path), NULL },
 940         { "pem_file_type", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, file_type), "yes" },
 941         { "private_key_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, private_key_file), NULL },
 942         { "certificate_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, certificate_file), NULL },
 943         { "CA_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT | PW_TYPE_DEPRECATED, fr_tls_server_conf_t, ca_file), NULL },
 944         { "ca_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_file), NULL },
 945         { "private_key_password", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, fr_tls_server_conf_t, private_key_password), NULL },
 946 #ifdef PSK_MAX_IDENTITY_LEN
 947         { "psk_identity", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, psk_identity), NULL },
 948         { "psk_hexphrase", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, fr_tls_server_conf_t, psk_password), NULL },
 949         { "psk_query", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, psk_query), NULL },
 950 #endif
 951         { "dh_file", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, dh_file), NULL },
 952         { "random_file", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, random_file), NULL },
 953         { "fragment_size", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, fragment_size), "1024" },
 954         { "include_length", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, include_length), "yes" },
 955         { "check_crl", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, check_crl), "no" },
 956         { "allow_expired_crl", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, allow_expired_crl), NULL },
 957         { "check_cert_cn", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_cn), NULL },
 958         { "cipher_list", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, cipher_list), NULL },
 959         { "check_cert_issuer", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_issuer), NULL },
 960         { "require_client_cert", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, require_client_cert), NULL },
 961
 962 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
 963 #ifndef OPENSSL_NO_ECDH
 964         { "ecdh_curve", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, ecdh_curve), "prime256v1" },
 965 #endif
 966 #endif
 967
 968         { "disable_tlsv1_1", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1_1), NULL },
 969         { "disable_tlsv1_2", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1_2), NULL },
 970
 971         { "cache", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) cache_config },
 972
 973         { "verify", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) verify_config },
 974
 975 #ifdef HAVE_OPENSSL_OCSP_H
 976         { "ocsp", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) ocsp_config },
 977 #endif
 978
 979         { NULL, -1, 0, NULL, NULL }        /* end the list */
 980 };
 981
 982
 983 static CONF_PARSER tls_client_config[] = {
 984         { "rsa_key_exchange", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, rsa_key), "no" },
 985         { "dh_key_exchange", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, dh_key), "yes" },
 986         { "rsa_key_length", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, rsa_key_length), "512" },
 987         { "dh_key_length", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, dh_key_length), "512" },
 988         { "verify_depth", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, verify_depth), "0" },
 989         { "ca_path", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_path), NULL },
 990         { "pem_file_type", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, file_type), "yes" },
 991         { "private_key_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, private_key_file), NULL },
 992         { "certificate_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, certificate_file), NULL },
 993         { "ca_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_file), NULL },
 994         { "private_key_password", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, fr_tls_server_conf_t, private_key_password), NULL },
 995         { "dh_file", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, dh_file), NULL },
 996         { "random_file", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, random_file), NULL },
 997         { "fragment_size", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, fragment_size), "1024" },
 998         { "include_length", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, include_length), "yes" },
 999         { "check_crl", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, check_crl), "no" },
1000         { "check_cert_cn", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_cn), NULL },
1001         { "cipher_list", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, cipher_list), NULL },
1002         { "check_cert_issuer", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_issuer), NULL },
1003
1004 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
1005 #ifndef OPENSSL_NO_ECDH
1006         { "ecdh_curve", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, ecdh_curve), "prime256v1" },
1007 #endif
1008 #endif
1009
1010 #ifdef SSL_OP_NO_TLSv1_1
1011         { "disable_tlsv1_1", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1_1), NULL },
1012 #endif
1013 #ifdef SSL_OP_NO_TLSv1_2
1014         { "disable_tlsv1_2", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1_2), NULL },
1015 #endif
1016
1017         { NULL, -1, 0, NULL, NULL }        /* end the list */
1018 };
1019
1020
1021 /*
1022  *      TODO: Check for the type of key exchange * like conf->dh_key
1023  */
1024 static int load_dh_params(SSL_CTX *ctx, char *file)
1025 {
1026         DH *dh = NULL;
1027         BIO *bio;
1028
1029         if (!file) return 0;
1030
1031         if ((bio = BIO_new_file(file, "r")) == NULL) {
1032                 ERROR("tls: Unable to open DH file - %s", file);
1033                 return -1;
1034         }
1035
1036         dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
1037         BIO_free(bio);
1038         if (!dh) {
1039                 WARN("tls: Unable to set DH parameters.  DH cipher suites may not work!");
1040                 WARN("Fix this by running the OpenSSL command listed in eap.conf");
1041                 return 0;
1042         }
1043
1044         if (SSL_CTX_set_tmp_dh(ctx, dh) < 0) {
1045                 ERROR("tls: Unable to set DH parameters");
1046                 DH_free(dh);
1047                 return -1;
1048         }
1049
1050         DH_free(dh);
1051         return 0;
1052 }
1053
1054
1055 /*
1056  *      Print debugging messages, and free data.
1057  *
1058  *      FIXME: Write sessions to some long-term storage, so that
1059  *             session resumption can still occur after the server
1060  *             restarts.
1061  */
1062 #define MAX_SESSION_SIZE (256)
1063
1064 static void cbtls_remove_session(SSL_CTX *ctx, SSL_SESSION *sess)
1065 {
1066         size_t size;
1067         char buffer[2 * MAX_SESSION_SIZE + 1];
1068         fr_tls_server_conf_t *conf;
1069
1070         size = sess->session_id_length;
1071         if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
1072
1073         fr_bin2hex(buffer, sess->session_id, size);
1074
1075         DEBUG2("  SSL: Removing session %s from the cache", buffer);
1076         conf = (fr_tls_server_conf_t *)SSL_CTX_get_app_data(ctx);
1077         if (conf && conf->session_cache_path) {
1078                 int rv;
1079                 char filename[256];
1080
1081                 /* remove session and any cached VPs */
1082                 snprintf(filename, sizeof(filename), "%s%c%s.asn1",
1083                          conf->session_cache_path, FR_DIR_SEP, buffer);
1084                 rv = unlink(filename);
1085                 if (rv != 0) {
1086                         DEBUG2("  SSL: could not remove persisted session file %s: %s", filename, fr_syserror(errno));
1087                 }
1088                 /* VPs might be absent; might not have been written to disk yet */
1089                 snprintf(filename, sizeof(filename), "%s%c%s.vps",
1090                          conf->session_cache_path, FR_DIR_SEP, buffer);
1091                 unlink(filename);
1092         }
1093
1094         return;
1095 }
1096
1097 static int cbtls_new_session(SSL *ssl, SSL_SESSION *sess)
1098 {
1099         size_t size;
1100         char buffer[2 * MAX_SESSION_SIZE + 1];
1101         fr_tls_server_conf_t *conf;
1102         unsigned char *sess_blob = NULL;
1103
1104         size = sess->session_id_length;
1105         if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
1106
1107         fr_bin2hex(buffer, sess->session_id, size);
1108
1109         DEBUG2("  SSL: adding session %s to cache", buffer);
1110
1111         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_CONF);
1112         if (conf && conf->session_cache_path) {
1113                 int fd, rv, todo, blob_len;
1114                 char filename[256];
1115                 unsigned char *p;
1116
1117                 /* find out what length data we need */
1118                 blob_len = i2d_SSL_SESSION(sess, NULL);
1119                 if (blob_len < 1) {
1120                         /* something went wrong */
1121                         DEBUG2("  SSL: could not find buffer length to persist session");
1122                         return 0;
1123                 }
1124
1125
1126                 /* Do not convert to TALLOC - Thread safety */
1127                 /* alloc and convert to ASN.1 */
1128                 sess_blob = malloc(blob_len);
1129                 if (!sess_blob) {
1130                         DEBUG2("  SSL: could not allocate buffer len=%d to persist session", blob_len);
1131                         return 0;
1132                 }
1133                 /* openssl mutates &p */
1134                 p = sess_blob;
1135                 rv = i2d_SSL_SESSION(sess, &p);
1136                 if (rv != blob_len) {
1137                         DEBUG2("  SSL: could not persist session");
1138                         goto error;
1139                 }
1140
1141                 /* open output file */
1142                 snprintf(filename, sizeof(filename), "%s%c%s.asn1",
1143                          conf->session_cache_path, FR_DIR_SEP, buffer);
1144                 fd = open(filename, O_RDWR|O_CREAT|O_EXCL, 0600);
1145                 if (fd < 0) {
1146                         DEBUG2("  SSL: could not open session file %s: %s", filename, fr_syserror(errno));
1147                         goto error;
1148                 }
1149
1150                 todo = blob_len;
1151                 p = sess_blob;
1152                 while (todo > 0) {
1153                         rv = write(fd, p, todo);
1154                         if (rv < 1) {
1155                                 DEBUG2("  SSL: failed writing session: %s", fr_syserror(errno));
1156                                 close(fd);
1157                                 goto error;
1158                         }
1159                         p += rv;
1160                         todo -= rv;
1161                 }
1162                 close(fd);
1163                 DEBUG2("  SSL: wrote session %s to %s len=%d", buffer, filename, blob_len);
1164         }
1165
1166 error:
1167         free(sess_blob);
1168
1169         return 0;
1170 }
1171
1172 static SSL_SESSION *cbtls_get_session(SSL *ssl,
1173                                       unsigned char *data, int len,
1174                                       int *copy)
1175 {
1176         size_t size;
1177         char buffer[2 * MAX_SESSION_SIZE + 1];
1178         fr_tls_server_conf_t *conf;
1179         TALLOC_CTX *talloc_ctx;
1180
1181         SSL_SESSION *sess = NULL;
1182         unsigned char *sess_data = NULL;
1183         PAIR_LIST *pairlist = NULL;
1184
1185         size = len;
1186         if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
1187
1188         fr_bin2hex(buffer, data, size);
1189
1190         DEBUG2("  SSL: Client requested cached session %s", buffer);
1191
1192         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_CONF);
1193         talloc_ctx = SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_TALLOC);
1194         if (conf && conf->session_cache_path) {
1195                 int rv, fd, todo;
1196                 char filename[256];
1197                 unsigned char *p;
1198                 struct stat st;
1199                 VALUE_PAIR *vp;
1200
1201                 /* read in the cached VPs from the .vps file */
1202                 snprintf(filename, sizeof(filename), "%s%c%s.vps",
1203                          conf->session_cache_path, FR_DIR_SEP, buffer);
1204                 rv = pairlist_read(NULL, filename, &pairlist, 1);
1205                 if (rv < 0) {
1206                         /* not safe to un-persist a session w/o VPs */
1207                         DEBUG2("  SSL: could not load persisted VPs for session %s", buffer);
1208                         goto err;
1209                 }
1210
1211                 /* load the actual SSL session */
1212                 snprintf(filename, sizeof(filename), "%s%c%s.asn1",
1213                          conf->session_cache_path, FR_DIR_SEP, buffer);
1214                 fd = open(filename, O_RDONLY);
1215                 if (fd < 0) {
1216                         DEBUG2("  SSL: could not find persisted session file %s: %s", filename, fr_syserror(errno));
1217                         goto err;
1218                 }
1219
1220                 rv = fstat(fd, &st);
1221                 if (rv < 0) {
1222                         DEBUG2("  SSL: could not stat persisted session file %s: %s", filename, fr_syserror(errno));
1223                         close(fd);
1224                         goto err;
1225                 }
1226
1227                 sess_data = talloc_array(NULL, unsigned char, st.st_size);
1228                 if (!sess_data) {
1229                   DEBUG2("  SSL: could not alloc buffer for persisted session len=%d", (int) st.st_size);
1230                         close(fd);
1231                         goto err;
1232                 }
1233
1234                 p = sess_data;
1235                 todo = st.st_size;
1236                 while (todo > 0) {
1237                         rv = read(fd, p, todo);
1238                         if (rv < 1) {
1239                                 DEBUG2("  SSL: could not read from persisted session: %s", fr_syserror(errno));
1240                                 close(fd);
1241                                 goto err;
1242                         }
1243                         todo -= rv;
1244                         p += rv;
1245                 }
1246                 close(fd);
1247
1248                 /* openssl mutates &p */
1249                 p = sess_data;
1250                 sess = d2i_SSL_SESSION(NULL, (unsigned char const **)(void **) &p, st.st_size);
1251
1252                 if (!sess) {
1253                         DEBUG2("  SSL: OpenSSL failed to load persisted session: %s", ERR_error_string(ERR_get_error(), NULL));
1254                         goto err;
1255                 }
1256
1257                 /* cache the VPs into the session */
1258                 vp = paircopy(talloc_ctx, pairlist->reply);
1259                 SSL_SESSION_set_ex_data(sess, fr_tls_ex_index_vps, vp);
1260                 DEBUG2("  SSL: Successfully restored session %s", buffer);
1261         }
1262 err:
1263         if (sess_data) talloc_free(sess_data);
1264         if (pairlist) pairlist_free(&pairlist);
1265
1266         *copy = 0;
1267         return sess;
1268 }
1269
1270 #ifdef HAVE_OPENSSL_OCSP_H
1271 /*
1272  * This function extracts the OCSP Responder URL
1273  * from an existing x509 certificate.
1274  */
1275 static int ocsp_parse_cert_url(X509 *cert, char **phost, char **pport,
1276                                char **ppath, int *pssl)
1277 {
1278         int i;
1279
1280         AUTHORITY_INFO_ACCESS *aia;
1281         ACCESS_DESCRIPTION *ad;
1282
1283         aia = X509_get_ext_d2i(cert, NID_info_access, NULL, NULL);
1284
1285         for (i = 0; i < sk_ACCESS_DESCRIPTION_num(aia); i++) {
1286                 ad = sk_ACCESS_DESCRIPTION_value(aia, i);
1287                 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
1288                         if (ad->location->type == GEN_URI) {
1289                           if(OCSP_parse_url((char *) ad->location->d.ia5->data,
1290                                                   phost, pport, ppath, pssl))
1291                                         return 1;
1292                         }
1293                 }
1294         }
1295         return 0;
1296 }
1297
1298 /*
1299  * This function sends a OCSP request to a defined OCSP responder
1300  * and checks the OCSP response for correctness.
1301  */
1302
1303 /* Maximum leeway in validity period: default 5 minutes */
1304 #define MAX_VALIDITY_PERIOD     (5 * 60)
1305
1306 static int ocsp_check(X509_STORE *store, X509 *issuer_cert, X509 *client_cert,
1307                       fr_tls_server_conf_t *conf)
1308 {
1309         OCSP_CERTID *certid;
1310         OCSP_REQUEST *req;
1311         OCSP_RESPONSE *resp = NULL;
1312         OCSP_BASICRESP *bresp = NULL;
1313         char *host = NULL;
1314         char *port = NULL;
1315         char *path = NULL;
1316         char hostheader[1024];
1317         int use_ssl = -1;
1318         long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
1319         BIO *cbio, *bio_out;
1320         int ocsp_ok = 0;
1321         int status ;
1322         ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
1323         int reason;
1324 #if OPENSSL_VERSION_NUMBER >= 0x1000003f
1325         OCSP_REQ_CTX *ctx;
1326         int rc;
1327         struct timeval now;
1328         struct timeval when;
1329 #endif
1330
1331         /*
1332          * Create OCSP Request
1333          */
1334         certid = OCSP_cert_to_id(NULL, client_cert, issuer_cert);
1335         req = OCSP_REQUEST_new();
1336         OCSP_request_add0_id(req, certid);
1337         if(conf->ocsp_use_nonce) {
1338                 OCSP_request_add1_nonce(req, NULL, 8);
1339         }
1340
1341         /*
1342          * Send OCSP Request and get OCSP Response
1343          */
1344
1345         /* Get OCSP responder URL */
1346         if (conf->ocsp_override_url) {
1347                 char *url;
1348
1349                 memcpy(&url, &conf->ocsp_url, sizeof(url));
1350                 /* Reading the libssl src, they do a strdup on the URL, so it could of been const *sigh* */
1351                 OCSP_parse_url(url, &host, &port, &path, &use_ssl);
1352         }
1353         else {
1354                 ocsp_parse_cert_url(client_cert, &host, &port, &path, &use_ssl);
1355         }
1356
1357         if (!host || !port || !path) {
1358                 DEBUG2("[ocsp] - Host / port / path missing.  Not doing OCSP");
1359                 ocsp_ok = 2;
1360                 goto ocsp_skip;
1361         }
1362
1363         DEBUG2("[ocsp] --> Responder URL = http://%s:%s%s", host, port, path);
1364
1365         /* Check host and port length are sane, then create Host: HTTP header */
1366         if ((strlen(host) + strlen(port) + 2) > sizeof(hostheader)) {
1367                 ERROR("OCSP Host and port too long");
1368                 goto ocsp_skip;
1369         }
1370         snprintf(hostheader, sizeof(hostheader), "%s:%s", host, port);
1371
1372         /* Setup BIO socket to OCSP responder */
1373         cbio = BIO_new_connect(host);
1374
1375         bio_out = NULL;
1376         if (debug_flag) {
1377                 if (default_log.dst == L_DST_STDOUT) {
1378                         bio_out = BIO_new_fp(stdout, BIO_NOCLOSE);
1379                 } else if (default_log.dst == L_DST_STDERR) {
1380                         bio_out = BIO_new_fp(stderr, BIO_NOCLOSE);
1381                 }
1382         }
1383
1384         BIO_set_conn_port(cbio, port);
1385 #if OPENSSL_VERSION_NUMBER < 0x1000003f
1386         BIO_do_connect(cbio);
1387
1388         /* Send OCSP request and wait for response */
1389         resp = OCSP_sendreq_bio(cbio, path, req);
1390         if (!resp) {
1391                 ERROR("Couldn't get OCSP response");
1392                 ocsp_ok = 2;
1393                 goto ocsp_end;
1394         }
1395 #else
1396         if (conf->ocsp_timeout)
1397                 BIO_set_nbio(cbio, 1);
1398
1399         rc = BIO_do_connect(cbio);
1400         if ((rc <= 0) && ((!conf->ocsp_timeout) || !BIO_should_retry(cbio))) {
1401                 ERROR("Couldn't connect to OCSP responder");
1402                 ocsp_ok = 2;
1403                 goto ocsp_end;
1404         }
1405
1406         ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
1407         if (!ctx) {
1408                 ERROR("Couldn't create OCSP request");
1409                 ocsp_ok = 2;
1410                 goto ocsp_end;
1411         }
1412
1413         if (!OCSP_REQ_CTX_add1_header(ctx, "Host", hostheader)) {
1414                 ERROR("Couldn't set Host header");
1415                 ocsp_ok = 2;
1416                 goto ocsp_end;
1417         }
1418
1419         if (!OCSP_REQ_CTX_set1_req(ctx, req)) {
1420                 ERROR("Couldn't add data to OCSP request");
1421                 ocsp_ok = 2;
1422                 goto ocsp_end;
1423         }
1424
1425         gettimeofday(&when, NULL);
1426         when.tv_sec += conf->ocsp_timeout;
1427
1428         do {
1429                 rc = OCSP_sendreq_nbio(&resp, ctx);
1430                 if (conf->ocsp_timeout) {
1431                         gettimeofday(&now, NULL);
1432                         if (!timercmp(&now, &when, <))
1433                                 break;
1434                 }
1435         } while ((rc == -1) && BIO_should_retry(cbio));
1436
1437         if (conf->ocsp_timeout && (rc == -1) && BIO_should_retry(cbio)) {
1438                 ERROR("OCSP response timed out");
1439                 ocsp_ok = 2;
1440                 goto ocsp_end;
1441         }
1442
1443         OCSP_REQ_CTX_free(ctx);
1444
1445         if (rc == 0) {
1446                 ERROR("Couldn't get OCSP response");
1447                 ocsp_ok = 2;
1448                 goto ocsp_end;
1449         }
1450 #endif
1451
1452         /* Verify OCSP response status */
1453         status = OCSP_response_status(resp);
1454         DEBUG2("[ocsp] --> Response status: %s",OCSP_response_status_str(status));
1455         if(status != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
1456                 ERROR("OCSP response status: %s", OCSP_response_status_str(status));
1457                 goto ocsp_end;
1458         }
1459         bresp = OCSP_response_get1_basic(resp);
1460         if(conf->ocsp_use_nonce && OCSP_check_nonce(req, bresp)!=1) {
1461                 ERROR("OCSP response has wrong nonce value");
1462                 goto ocsp_end;
1463         }
1464         if(OCSP_basic_verify(bresp, NULL, store, 0)!=1){
1465                 ERROR("Couldn't verify OCSP basic response");
1466                 goto ocsp_end;
1467         }
1468
1469         /*      Verify OCSP cert status */
1470         if(!OCSP_resp_find_status(bresp, certid, &status, &reason,
1471                                                       &rev, &thisupd, &nextupd)) {
1472                 ERROR("No Status found.\n");
1473                 goto ocsp_end;
1474         }
1475
1476         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
1477                 if (bio_out) {
1478                         BIO_puts(bio_out, "WARNING: Status times invalid.\n");
1479                         ERR_print_errors(bio_out);
1480                 }
1481                 goto ocsp_end;
1482         }
1483
1484
1485         if (bio_out) {
1486                 BIO_puts(bio_out, "\tThis Update: ");
1487                 ASN1_GENERALIZEDTIME_print(bio_out, thisupd);
1488                 BIO_puts(bio_out, "\n");
1489                 if (nextupd) {
1490                         BIO_puts(bio_out, "\tNext Update: ");
1491                         ASN1_GENERALIZEDTIME_print(bio_out, nextupd);
1492                         BIO_puts(bio_out, "\n");
1493                 }
1494         }
1495
1496         switch (status) {
1497         case V_OCSP_CERTSTATUS_GOOD:
1498                 DEBUG2("[oscp] --> Cert status: good");
1499                 ocsp_ok = 1;
1500                 break;
1501
1502         default:
1503                 /* REVOKED / UNKNOWN */
1504                 DEBUG2("[ocsp] --> Cert status: %s",OCSP_cert_status_str(status));
1505                 if (reason != -1)
1506                         DEBUG2("[ocsp] --> Reason: %s", OCSP_crl_reason_str(reason));
1507
1508                 if (bio_out) {
1509                         BIO_puts(bio_out, "\tRevocation Time: ");
1510                         ASN1_GENERALIZEDTIME_print(bio_out, rev);
1511                         BIO_puts(bio_out, "\n");
1512                 }
1513                 break;
1514         }
1515
1516 ocsp_end:
1517         /* Free OCSP Stuff */
1518         OCSP_REQUEST_free(req);
1519         OCSP_RESPONSE_free(resp);
1520         free(host);
1521         free(port);
1522         free(path);
1523         BIO_free_all(cbio);
1524         if (bio_out) BIO_free(bio_out);
1525         OCSP_BASICRESP_free(bresp);
1526
1527  ocsp_skip:
1528         switch (ocsp_ok) {
1529         case 1:
1530                 DEBUG2("[ocsp] --> Certificate is valid!");
1531                 break;
1532         case 2:
1533                 if (conf->ocsp_softfail) {
1534                         DEBUG2("[ocsp] --> Unable to check certificate; assuming valid");
1535                         DEBUG2("[ocsp] --> Warning! This may be insecure");
1536                         ocsp_ok = 1;
1537                 } else {
1538                         DEBUG2("[ocsp] --> Unable to check certificate; failing!");
1539                         ocsp_ok = 0;
1540                 }
1541                 break;
1542         default:
1543                 DEBUG2("[ocsp] --> Certificate has been expired/revoked!");
1544                 break;
1545         }
1546
1547         return ocsp_ok;
1548 }
1549 #endif  /* HAVE_OPENSSL_OCSP_H */
1550
1551 /*
1552  *      For creating certificate attributes.
1553  */
1554 static char const *cert_attr_names[8][2] = {
1555   { "TLS-Client-Cert-Serial",           "TLS-Cert-Serial" },
1556   { "TLS-Client-Cert-Expiration",       "TLS-Cert-Expiration" },
1557   { "TLS-Client-Cert-Subject",          "TLS-Cert-Subject" },
1558   { "TLS-Client-Cert-Issuer",           "TLS-Cert-Issuer" },
1559   { "TLS-Client-Cert-Common-Name",      "TLS-Cert-Common-Name" },
1560   { "TLS-Client-Cert-Subject-Alt-Name-Email",   "TLS-Cert-Subject-Alt-Name-Email" },
1561   { "TLS-Client-Cert-Subject-Alt-Name-Dns",     "TLS-Cert-Subject-Alt-Name-Dns" },
1562   { "TLS-Client-Cert-Subject-Alt-Name-Upn",     "TLS-Cert-Subject-Alt-Name-Upn" }
1563 };
1564
1565 #define FR_TLS_SERIAL           (0)
1566 #define FR_TLS_EXPIRATION       (1)
1567 #define FR_TLS_SUBJECT          (2)
1568 #define FR_TLS_ISSUER           (3)
1569 #define FR_TLS_CN               (4)
1570 #define FR_TLS_SAN_EMAIL        (5)
1571 #define FR_TLS_SAN_DNS          (6)
1572 #define FR_TLS_SAN_UPN          (7)
1573
1574 /*
1575  *      Before trusting a certificate, you must make sure that the
1576  *      certificate is 'valid'. There are several steps that your
1577  *      application can take in determining if a certificate is
1578  *      valid. Commonly used steps are:
1579  *
1580  *      1.Verifying the certificate's signature, and verifying that
1581  *      the certificate has been issued by a trusted Certificate
1582  *      Authority.
1583  *
1584  *      2.Verifying that the certificate is valid for the present date
1585  *      (i.e. it is being presented within its validity dates).
1586  *
1587  *      3.Verifying that the certificate has not been revoked by its
1588  *      issuing Certificate Authority, by checking with respect to a
1589  *      Certificate Revocation List (CRL).
1590  *
1591  *      4.Verifying that the credentials presented by the certificate
1592  *      fulfill additional requirements specific to the application,
1593  *      such as with respect to access control lists or with respect
1594  *      to OCSP (Online Certificate Status Processing).
1595  *
1596  *      NOTE: This callback will be called multiple times based on the
1597  *      depth of the root certificate chain
1598  */
1599 int cbtls_verify(int ok, X509_STORE_CTX *ctx)
1600 {
1601         char subject[1024]; /* Used for the subject name */
1602         char issuer[1024]; /* Used for the issuer name */
1603         char attribute[1024];
1604         char value[1024];
1605         char common_name[1024];
1606         char cn_str[1024];
1607         char buf[64];
1608         X509 *client_cert;
1609         X509_CINF *client_inf;
1610         STACK_OF(X509_EXTENSION) *ext_list;
1611         SSL *ssl;
1612         int err, depth, lookup, loc;
1613         fr_tls_server_conf_t *conf;
1614         int my_ok = ok;
1615         REQUEST *request;
1616         ASN1_INTEGER *sn = NULL;
1617         ASN1_TIME *asn_time = NULL;
1618         VALUE_PAIR **certs;
1619         char **identity;
1620 #ifdef HAVE_OPENSSL_OCSP_H
1621         X509_STORE *ocsp_store = NULL;
1622         X509 *issuer_cert;
1623 #endif
1624         VALUE_PAIR *vp;
1625         TALLOC_CTX *talloc_ctx;
1626
1627         client_cert = X509_STORE_CTX_get_current_cert(ctx);
1628         err = X509_STORE_CTX_get_error(ctx);
1629         depth = X509_STORE_CTX_get_error_depth(ctx);
1630
1631         lookup = depth;
1632
1633         /*
1634          *      Log client/issuing cert.  If there's an error, log
1635          *      issuing cert.
1636          */
1637         if ((lookup > 1) && !my_ok) lookup = 1;
1638
1639         /*
1640          * Retrieve the pointer to the SSL of the connection currently treated
1641          * and the application specific data stored into the SSL object.
1642          */
1643         ssl = X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
1644         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_CONF);
1645         if (!conf) return 1;
1646
1647         request = (REQUEST *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_REQUEST);
1648         rad_assert(request != NULL);
1649         certs = (VALUE_PAIR **)SSL_get_ex_data(ssl, fr_tls_ex_index_certs);
1650
1651         identity = (char **)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_IDENTITY);
1652 #ifdef HAVE_OPENSSL_OCSP_H
1653         ocsp_store = (X509_STORE *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_STORE);
1654 #endif
1655
1656         talloc_ctx = SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_TALLOC);
1657
1658         /*
1659          *      Get the Serial Number
1660          */
1661         buf[0] = '\0';
1662         sn = X509_get_serialNumber(client_cert);
1663
1664         RDEBUG2("TLS Verify adding attributes");
1665         RINDENT();
1666
1667         /*
1668          *      For this next bit, we create the attributes *only* if
1669          *      we're at the client or issuing certificate, AND we
1670          *      have a user identity.  i.e. we don't create the
1671          *      attributes for RadSec connections.
1672          */
1673         if (certs && identity &&
1674             (lookup <= 1) && sn && ((size_t) sn->length < (sizeof(buf) / 2))) {
1675                 char *p = buf;
1676                 int i;
1677
1678                 for (i = 0; i < sn->length; i++) {
1679                         sprintf(p, "%02x", (unsigned int)sn->data[i]);
1680                         p += 2;
1681                 }
1682                 vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_SERIAL][lookup], buf, T_OP_SET);
1683                 rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1684         }
1685
1686
1687         /*
1688          *      Get the Expiration Date
1689          */
1690         buf[0] = '\0';
1691         asn_time = X509_get_notAfter(client_cert);
1692         if (certs && identity && (lookup <= 1) && asn_time &&
1693             (asn_time->length < (int) sizeof(buf))) {
1694                 memcpy(buf, (char*) asn_time->data, asn_time->length);
1695                 buf[asn_time->length] = '\0';
1696                 vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_EXPIRATION][lookup], buf, T_OP_SET);
1697                 rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1698         }
1699
1700         /*
1701          *      Get the Subject & Issuer
1702          */
1703         subject[0] = issuer[0] = '\0';
1704         X509_NAME_oneline(X509_get_subject_name(client_cert), subject,
1705                           sizeof(subject));
1706         subject[sizeof(subject) - 1] = '\0';
1707         if (certs && identity && (lookup <= 1) && subject[0]) {
1708                 vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_SUBJECT][lookup], subject, T_OP_SET);
1709                 rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1710         }
1711
1712         X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), issuer,
1713                           sizeof(issuer));
1714         issuer[sizeof(issuer) - 1] = '\0';
1715         if (certs && identity && (lookup <= 1) && issuer[0]) {
1716                 vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_ISSUER][lookup], issuer, T_OP_SET);
1717                 rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1718         }
1719
1720         /*
1721          *      Get the Common Name, if there is a subject.
1722          */
1723         X509_NAME_get_text_by_NID(X509_get_subject_name(client_cert),
1724                                   NID_commonName, common_name, sizeof(common_name));
1725         common_name[sizeof(common_name) - 1] = '\0';
1726         if (certs && identity && (lookup <= 1) && common_name[0] && subject[0]) {
1727                 vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_CN][lookup], common_name, T_OP_SET);
1728                 rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1729         }
1730
1731         /*
1732          *      Get the RFC822 Subject Alternative Name
1733          */
1734         loc = X509_get_ext_by_NID(client_cert, NID_subject_alt_name, 0);
1735         if (certs && (lookup <= 1) && (loc >= 0)) {
1736                 X509_EXTENSION *ext = NULL;
1737                 GENERAL_NAMES *names = NULL;
1738                 int i;
1739
1740                 if ((ext = X509_get_ext(client_cert, loc)) &&
1741                     (names = X509V3_EXT_d2i(ext))) {
1742                         for (i = 0; i < sk_GENERAL_NAME_num(names); i++) {
1743                                 GENERAL_NAME *name = sk_GENERAL_NAME_value(names, i);
1744
1745                                 switch (name->type) {
1746 #ifdef GEN_EMAIL
1747                                 case GEN_EMAIL:
1748                                         vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_SAN_EMAIL][lookup],
1749                                                       (char *) ASN1_STRING_data(name->d.rfc822Name), T_OP_SET);
1750                                         rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1751                                         break;
1752 #endif  /* GEN_EMAIL */
1753 #ifdef GEN_DNS
1754                                 case GEN_DNS:
1755                                         vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_SAN_DNS][lookup],
1756                                                       (char *) ASN1_STRING_data(name->d.dNSName), T_OP_SET);
1757                                         rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1758                                         break;
1759 #endif  /* GEN_DNS */
1760 #ifdef GEN_OTHERNAME
1761                                 case GEN_OTHERNAME:
1762                                         /* look for a MS UPN */
1763                                         if (NID_ms_upn == OBJ_obj2nid(name->d.otherName->type_id)) {
1764                                             /* we've got a UPN - Must be ASN1-encoded UTF8 string */
1765                                             if (name->d.otherName->value->type == V_ASN1_UTF8STRING) {
1766                                                     vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_SAN_UPN][lookup],
1767                                                                   (char *) ASN1_STRING_data(name->d.otherName->value->value.utf8string), T_OP_SET);
1768                                                     rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1769                                                 break;
1770                                             } else {
1771                                                 RWARN("Invalid UPN in Subject Alt Name (should be UTF-8)");
1772                                                 break;
1773                                             }
1774                                         }
1775                                         break;
1776 #endif  /* GEN_OTHERNAME */
1777                                 default:
1778                                         /* XXX TODO handle other SAN types */
1779                                         break;
1780                                 }
1781                         }
1782                 }
1783                 if (names != NULL)
1784                         sk_GENERAL_NAME_free(names);
1785         }
1786
1787         /*
1788          *      If the CRL has expired, that might still be OK.
1789          */
1790         if (!my_ok &&
1791             (conf->allow_expired_crl) &&
1792             (err == X509_V_ERR_CRL_HAS_EXPIRED)) {
1793                 my_ok = 1;
1794                 X509_STORE_CTX_set_error( ctx, 0 );
1795         }
1796
1797         if (!my_ok) {
1798                 char const *p = X509_verify_cert_error_string(err);
1799                 RERROR("SSL says error %d : %s", err, p);
1800                 REXDENT();
1801                 return my_ok;
1802         }
1803
1804         if (lookup == 0) {
1805                 client_inf = client_cert->cert_info;
1806                 ext_list = client_inf->extensions;
1807         } else {
1808                 ext_list = NULL;
1809         }
1810
1811         /*
1812          *      Grab the X509 extensions, and create attributes out of them.
1813          *      For laziness, we re-use the OpenSSL names
1814          */
1815         if (sk_X509_EXTENSION_num(ext_list) > 0) {
1816                 int i, len;
1817                 char *p;
1818                 BIO *out;
1819
1820                 out = BIO_new(BIO_s_mem());
1821                 strlcpy(attribute, "TLS-Client-Cert-", sizeof(attribute));
1822
1823                 for (i = 0; i < sk_X509_EXTENSION_num(ext_list); i++) {
1824                         ASN1_OBJECT *obj;
1825                         X509_EXTENSION *ext;
1826
1827                         ext = sk_X509_EXTENSION_value(ext_list, i);
1828
1829                         obj = X509_EXTENSION_get_object(ext);
1830                         i2a_ASN1_OBJECT(out, obj);
1831                         len = BIO_read(out, attribute + 16 , sizeof(attribute) - 16 - 1);
1832                         if (len <= 0) continue;
1833
1834                         attribute[16 + len] = '\0';
1835
1836                         X509V3_EXT_print(out, ext, 0, 0);
1837                         len = BIO_read(out, value , sizeof(value) - 1);
1838                         if (len <= 0) continue;
1839
1840                         value[len] = '\0';
1841
1842                         /*
1843                          *      Mash the OpenSSL name to our name, and
1844                          *      create the attribute.
1845                          */
1846                         for (p = value + 16; *p != '\0'; p++) {
1847                                 if (*p == ' ') *p = '-';
1848                         }
1849
1850                         vp = pairmake(talloc_ctx, certs, attribute, value, T_OP_ADD);
1851                         rdebug_pair_list(L_DBG_LVL_2, request, vp, NULL);
1852                 }
1853
1854                 BIO_free_all(out);
1855         }
1856
1857         REXDENT();
1858
1859         switch (ctx->error) {
1860         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
1861                 RERROR("issuer=%s", issuer);
1862                 break;
1863
1864         case X509_V_ERR_CERT_NOT_YET_VALID:
1865         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
1866                 RERROR("notBefore=");
1867 #if 0
1868                 ASN1_TIME_print(bio_err, X509_get_notBefore(ctx->current_cert));
1869 #endif
1870                 break;
1871
1872         case X509_V_ERR_CERT_HAS_EXPIRED:
1873         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
1874                 RERROR("notAfter=");
1875 #if 0
1876                 ASN1_TIME_print(bio_err, X509_get_notAfter(ctx->current_cert));
1877 #endif
1878                 break;
1879         }
1880
1881         /*
1882          *      If we're at the actual client cert, apply additional
1883          *      checks.
1884          */
1885         if (depth == 0) {
1886                 /*
1887                  *      If the conf tells us to, check cert issuer
1888                  *      against the specified value and fail
1889                  *      verification if they don't match.
1890                  */
1891                 if (conf->check_cert_issuer &&
1892                     (strcmp(issuer, conf->check_cert_issuer) != 0)) {
1893                         AUTH("tls: Certificate issuer (%s) does not match specified value (%s)!", issuer, conf->check_cert_issuer);
1894                         my_ok = 0;
1895                 }
1896
1897                 /*
1898                  *      If the conf tells us to, check the CN in the
1899                  *      cert against xlat'ed value, but only if the
1900                  *      previous checks passed.
1901                  */
1902                 if (my_ok && conf->check_cert_cn) {
1903                         if (radius_xlat(cn_str, sizeof(cn_str), request, conf->check_cert_cn, NULL, NULL) < 0) {
1904                                 /* if this fails, fail the verification */
1905                                 my_ok = 0;
1906                         } else {
1907                                 RDEBUG2("checking certificate CN (%s) with xlat'ed value (%s)", common_name, cn_str);
1908                                 if (strcmp(cn_str, common_name) != 0) {
1909                                         AUTH("tls: Certificate CN (%s) does not match specified value (%s)!", common_name, cn_str);
1910                                         my_ok = 0;
1911                                 }
1912                         }
1913                 } /* check_cert_cn */
1914
1915 #ifdef HAVE_OPENSSL_OCSP_H
1916                 if (my_ok && conf->ocsp_enable){
1917                         RDEBUG2("--> Starting OCSP Request");
1918                         if (X509_STORE_CTX_get1_issuer(&issuer_cert, ctx, client_cert) != 1) {
1919                                 RERROR("Couldn't get issuer_cert for %s", common_name);
1920                         } else {
1921                                 my_ok = ocsp_check(ocsp_store, issuer_cert, client_cert, conf);
1922                         }
1923                 }
1924 #endif
1925
1926                 while (conf->verify_client_cert_cmd) {
1927                         char filename[256];
1928                         int fd;
1929                         FILE *fp;
1930
1931                         snprintf(filename, sizeof(filename), "%s/%s.client.XXXXXXXX",
1932                                  conf->verify_tmp_dir, progname);
1933                         fd = mkstemp(filename);
1934                         if (fd < 0) {
1935                                 RDEBUG("Failed creating file in %s: %s",
1936                                        conf->verify_tmp_dir, fr_syserror(errno));
1937                                 break;
1938                         }
1939
1940                         fp = fdopen(fd, "w");
1941                         if (!fp) {
1942                                 close(fd);
1943                                 RDEBUG("Failed opening file %s: %s",
1944                                        filename, fr_syserror(errno));
1945                                 break;
1946                         }
1947
1948                         if (!PEM_write_X509(fp, client_cert)) {
1949                                 fclose(fp);
1950                                 RDEBUG("Failed writing certificate to file");
1951                                 goto do_unlink;
1952                         }
1953                         fclose(fp);
1954
1955                         if (!pairmake_packet("TLS-Client-Cert-Filename",
1956                                              filename, T_OP_SET)) {
1957                                 RDEBUG("Failed creating TLS-Client-Cert-Filename");
1958
1959                                 goto do_unlink;
1960                         }
1961
1962                         RDEBUG("Verifying client certificate: %s", conf->verify_client_cert_cmd);
1963                         if (radius_exec_program(NULL, 0, NULL, request, conf->verify_client_cert_cmd,
1964                                                 request->packet->vps,
1965                                                 true, true, EXEC_TIMEOUT) != 0) {
1966                                 AUTH("tls: Certificate CN (%s) fails external verification!", common_name);
1967                                 my_ok = 0;
1968                         } else {
1969                                 RDEBUG("Client certificate CN %s passed external validation", common_name);
1970                         }
1971
1972                 do_unlink:
1973                         unlink(filename);
1974                         break;
1975                 }
1976
1977
1978         } /* depth == 0 */
1979
1980         if (debug_flag > 0) {
1981                 RDEBUG2("chain-depth=%d, ", depth);
1982                 RDEBUG2("error=%d", err);
1983
1984                 if (identity) RDEBUG2("--> User-Name = %s", *identity);
1985                 RDEBUG2("--> BUF-Name = %s", common_name);
1986                 RDEBUG2("--> subject = %s", subject);
1987                 RDEBUG2("--> issuer  = %s", issuer);
1988                 RDEBUG2("--> verify return:%d", my_ok);
1989         }
1990         return my_ok;
1991 }
1992
1993
1994 #ifdef HAVE_OPENSSL_OCSP_H
1995 /*
1996  *      Create Global X509 revocation store and use it to verify
1997  *      OCSP responses
1998  *
1999  *      - Load the trusted CAs
2000  *      - Load the trusted issuer certificates
2001  */
2002 static X509_STORE *init_revocation_store(fr_tls_server_conf_t *conf)
2003 {
2004         X509_STORE *store = NULL;
2005
2006         store = X509_STORE_new();
2007
2008         /* Load the CAs we trust */
2009         if (conf->ca_file || conf->ca_path)
2010                 if(!X509_STORE_load_locations(store, conf->ca_file, conf->ca_path)) {
2011                         ERROR("tls: X509_STORE error %s", ERR_error_string(ERR_get_error(), NULL));
2012                         ERROR("tls: Error reading Trusted root CA list %s",conf->ca_file );
2013                         return NULL;
2014                 }
2015
2016 #ifdef X509_V_FLAG_CRL_CHECK
2017         if (conf->check_crl)
2018                 X509_STORE_set_flags(store, X509_V_FLAG_CRL_CHECK);
2019 #endif
2020         return store;
2021 }
2022 #endif  /* HAVE_OPENSSL_OCSP_H */
2023
2024 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
2025 #ifndef OPENSSL_NO_ECDH
2026 static int set_ecdh_curve(SSL_CTX *ctx, char const *ecdh_curve)
2027 {
2028         int      nid;
2029         EC_KEY  *ecdh;
2030
2031         if (!ecdh_curve || !*ecdh_curve) return 0;
2032
2033         nid = OBJ_sn2nid(ecdh_curve);
2034         if (!nid) {
2035                 ERROR("Unknown ecdh_curve \"%s\"", ecdh_curve);
2036                 return -1;
2037         }
2038
2039         ecdh = EC_KEY_new_by_curve_name(nid);
2040         if (!ecdh) {
2041                 ERROR("Unable to create new curve \"%s\"", ecdh_curve);
2042                 return -1;
2043         }
2044
2045         SSL_CTX_set_tmp_ecdh(ctx, ecdh);
2046
2047         SSL_CTX_set_options(ctx, SSL_OP_SINGLE_ECDH_USE);
2048
2049         EC_KEY_free(ecdh);
2050
2051         return 0;
2052 }
2053 #endif
2054 #endif
2055
2056 /*
2057  * DIE OPENSSL DIE DIE DIE
2058  *
2059  * What a palaver, just to free some data attached the
2060  * session. We need to do this because the "remove" callback
2061  * is called when refcount > 0 sometimes, if another thread
2062  * is using the session
2063  */
2064 static void sess_free_vps(UNUSED void *parent, void *data_ptr,
2065                                 UNUSED CRYPTO_EX_DATA *ad, UNUSED int idx,
2066                                 UNUSED long argl, UNUSED void *argp)
2067 {
2068         VALUE_PAIR *vp = data_ptr;
2069         if (!vp) return;
2070
2071         DEBUG2("  Freeing cached session VPs");
2072
2073         pairfree(&vp);
2074 }
2075
2076 static void sess_free_certs(UNUSED void *parent, void *data_ptr,
2077                                 UNUSED CRYPTO_EX_DATA *ad, UNUSED int idx,
2078                                 UNUSED long argl, UNUSED void *argp)
2079 {
2080         VALUE_PAIR **certs = data_ptr;
2081         if (!certs) return;
2082
2083         DEBUG2("  Freeing cached session Certificates");
2084
2085         pairfree(certs);
2086 }
2087
2088 /** Add all the default ciphers and message digests reate our context.
2089  *
2090  * This should be called exactly once from main, before reading the main config
2091  * or initialising any modules.
2092  */
2093 void tls_global_init(void)
2094 {
2095         SSL_load_error_strings();       /* readable error messages (examples show call before library_init) */
2096         SSL_library_init();             /* initialize library */
2097         OpenSSL_add_all_algorithms();   /* required for SHA2 in OpenSSL < 0.9.8o and 1.0.0.a */
2098         OPENSSL_config(NULL);
2099
2100         /*
2101          *      Initialize the index for the certificates.
2102          */
2103         fr_tls_ex_index_certs = SSL_SESSION_get_ex_new_index(0, NULL, NULL, NULL, sess_free_certs);
2104 }
2105
2106 #ifdef ENABLE_OPENSSL_VERSION_CHECK
2107 /** Check for vulnerable versions of libssl
2108  *
2109  * @param acknowledged The highest CVE number a user has confirmed is not present in the system's libssl.
2110  * @return 0 if the CVE specified by the user matches the most recent CVE we have, else -1.
2111  */
2112 int tls_global_version_check(char const *acknowledged)
2113 {
2114         uint64_t v;
2115
2116         if ((strcmp(acknowledged, libssl_defects[0].id) != 0) && (strcmp(acknowledged, "yes") != 0)) {
2117                 bool bad = false;
2118                 size_t i;
2119
2120                 /* Check for bad versions */
2121                 v = (uint64_t) SSLeay();
2122
2123                 for (i = 0; i < (sizeof(libssl_defects) / sizeof(*libssl_defects)); i++) {
2124                         libssl_defect_t *defect = &libssl_defects[i];
2125
2126                         if ((v >= defect->low) && (v <= defect->high)) {
2127                                 ERROR("Refusing to start with libssl version %s (in range %s)",
2128                                       ssl_version(), ssl_version_range(defect->low, defect->high));
2129                                 ERROR("Security advisory %s (%s)", defect->id, defect->name);
2130                                 ERROR("%s", defect->comment);
2131
2132                                 bad = true;
2133                         }
2134                 }
2135
2136                 if (bad) {
2137                         INFO("Once you have verified libssl has been correctly patched, "
2138                              "set security.allow_vulnerable_openssl = '%s'", libssl_defects[0].id);
2139                         return -1;
2140                 }
2141         }
2142
2143         return 0;
2144 }
2145 #endif
2146
2147 /** Free any memory alloced by libssl
2148  *
2149  */
2150 void tls_global_cleanup(void)
2151 {
2152         ERR_remove_state(0);
2153         ENGINE_cleanup();
2154         CONF_modules_unload(1);
2155         ERR_free_strings();
2156         EVP_cleanup();
2157         CRYPTO_cleanup_all_ex_data();
2158 }
2159
2160 /*
2161  *      Create SSL context
2162  *
2163  *      - Load the trusted CAs
2164  *      - Load the Private key & the certificate
2165  *      - Set the Context options & Verify options
2166  */
2167 SSL_CTX *tls_init_ctx(fr_tls_server_conf_t *conf, int client)
2168 {
2169         SSL_CTX *ctx;
2170         X509_STORE *certstore;
2171         int verify_mode = SSL_VERIFY_NONE;
2172         int ctx_options = 0;
2173         int type;
2174
2175         /*
2176          *      SHA256 is in all versions of OpenSSL, but isn't
2177          *      initialized by default.  It's needed for WiMAX
2178          *      certificates.
2179          */
2180 #ifdef HAVE_OPENSSL_EVP_SHA256
2181         EVP_add_digest(EVP_sha256());
2182 #endif
2183
2184         ctx = SSL_CTX_new(SSLv23_method()); /* which is really "all known SSL / TLS methods".  Idiots. */
2185         if (!ctx) {
2186                 int err;
2187                 while ((err = ERR_get_error())) {
2188                         DEBUG("Failed creating SSL context: %s",
2189                               ERR_error_string(err, NULL));
2190                         return NULL;
2191                 }
2192         }
2193
2194         /*
2195          * Save the config on the context so that callbacks which
2196          * only get SSL_CTX* e.g. session persistence, can get it
2197          */
2198         SSL_CTX_set_app_data(ctx, conf);
2199
2200         /*
2201          * Identify the type of certificates that needs to be loaded
2202          */
2203         if (conf->file_type) {
2204                 type = SSL_FILETYPE_PEM;
2205         } else {
2206                 type = SSL_FILETYPE_ASN1;
2207         }
2208
2209         /*
2210          * Set the password to load private key
2211          */
2212         if (conf->private_key_password) {
2213 #ifdef __APPLE__
2214                 /*
2215                  * We don't want to put the private key password in eap.conf, so  check
2216                  * for our special string which indicates we should get the password
2217                  * programmatically.
2218                  */
2219                 char const* special_string = "Apple:UseCertAdmin";
2220                 if (strncmp(conf->private_key_password, special_string, strlen(special_string)) == 0) {
2221                         char cmd[256];
2222                         char *password;
2223                         long const max_password_len = 128;
2224                         snprintf(cmd, sizeof(cmd) - 1, "/usr/sbin/certadmin --get-private-key-passphrase \"%s\"",
2225                                  conf->private_key_file);
2226
2227                         DEBUG2("tls: Getting private key passphrase using command \"%s\"", cmd);
2228
2229                         FILE* cmd_pipe = popen(cmd, "r");
2230                         if (!cmd_pipe) {
2231                                 ERROR("TLS: %s command failed.  Unable to get private_key_password", cmd);
2232                                 ERROR("Error reading private_key_file %s", conf->private_key_file);
2233                                 return NULL;
2234                         }
2235
2236                         rad_const_free(conf->private_key_password);
2237                         password = talloc_array(conf, char, max_password_len);
2238                         if (!password) {
2239                                 ERROR("TLS: Can't allocate space for private_key_password");
2240                                 ERROR("TLS: Error reading private_key_file %s", conf->private_key_file);
2241                                 pclose(cmd_pipe);
2242                                 return NULL;
2243                         }
2244
2245                         fgets(password, max_password_len, cmd_pipe);
2246                         pclose(cmd_pipe);
2247
2248                         /* Get rid of newline at end of password. */
2249                         password[strlen(password) - 1] = '\0';
2250
2251                         DEBUG3("tls:  Password from command = \"%s\"", password);
2252                         conf->private_key_password = password;
2253                 }
2254 #endif
2255
2256                 {
2257                         char *password;
2258
2259                         memcpy(&password, &conf->private_key_password, sizeof(password));
2260                         SSL_CTX_set_default_passwd_cb_userdata(ctx, password);
2261                         SSL_CTX_set_default_passwd_cb(ctx, cbtls_password);
2262                 }
2263         }
2264
2265 #ifdef PSK_MAX_IDENTITY_LEN
2266         if (!client) {
2267                 /*
2268                  *      No dynamic query exists.  There MUST be a
2269                  *      statically configured identity and password.
2270                  */
2271                 if (conf->psk_query && !*conf->psk_query) {
2272                         ERROR("Invalid PSK Configuration: psk_query cannot be empty");
2273                         return NULL;
2274                 }
2275
2276                 /*
2277                  *      Set the callback only if we can check things.
2278                  */
2279                 if (conf->psk_identity || conf->psk_query) {
2280                         SSL_CTX_set_psk_server_callback(ctx, psk_server_callback);
2281                 }
2282
2283         } else if (conf->psk_query) {
2284                 ERROR("Invalid PSK Configuration: psk_query cannot be used for outgoing connections");
2285                 return NULL;
2286         }
2287
2288         /*
2289          *      Now check that if PSK is being used, the config is valid.
2290          */
2291         if ((conf->psk_identity && !conf->psk_password) ||
2292             (!conf->psk_identity && conf->psk_password) ||
2293             (conf->psk_identity && !*conf->psk_identity) ||
2294             (conf->psk_password && !*conf->psk_password)) {
2295                 ERROR("Invalid PSK Configuration: psk_identity or psk_password are empty");
2296                 return NULL;
2297         }
2298
2299         if (conf->psk_identity) {
2300                 size_t psk_len, hex_len;
2301                 uint8_t buffer[PSK_MAX_PSK_LEN];
2302
2303                 if (conf->certificate_file ||
2304                     conf->private_key_password || conf->private_key_file ||
2305                     conf->ca_file || conf->ca_path) {
2306                         ERROR("When PSKs are used, No certificate configuration is permitted");
2307                         return NULL;
2308                 }
2309
2310                 if (client) {
2311                         SSL_CTX_set_psk_client_callback(ctx,
2312                                                         psk_client_callback);
2313                 }
2314
2315                 psk_len = strlen(conf->psk_password);
2316                 if (strlen(conf->psk_password) > (2 * PSK_MAX_PSK_LEN)) {
2317                         ERROR("psk_hexphrase is too long (max %d)",
2318                                PSK_MAX_PSK_LEN);
2319                         return NULL;
2320                 }
2321
2322                 /*
2323                  *      Check the password now, so that we don't have
2324                  *      errors at run-time.
2325                  */
2326                 hex_len = fr_hex2bin(buffer, sizeof(buffer), conf->psk_password, psk_len);
2327                 if (psk_len != (2 * hex_len)) {
2328                         ERROR("psk_hexphrase is not all hex");
2329                         return NULL;
2330                 }
2331
2332                 goto post_ca;
2333         }
2334 #else
2335         (void) client;  /* -Wunused */
2336 #endif
2337
2338         /*
2339          *      Load our keys and certificates
2340          *
2341          *      If certificates are of type PEM then we can make use
2342          *      of cert chain authentication using openssl api call
2343          *      SSL_CTX_use_certificate_chain_file.  Please see how
2344          *      the cert chain needs to be given in PEM from
2345          *      openSSL.org
2346          */
2347         if (!conf->certificate_file) goto load_ca;
2348
2349         if (type == SSL_FILETYPE_PEM) {
2350                 if (!(SSL_CTX_use_certificate_chain_file(ctx, conf->certificate_file))) {
2351                         ERROR("Error reading certificate file %s:%s",
2352                                conf->certificate_file,
2353                                ERR_error_string(ERR_get_error(), NULL));
2354                         return NULL;
2355                 }
2356
2357         } else if (!(SSL_CTX_use_certificate_file(ctx, conf->certificate_file, type))) {
2358                 ERROR("Error reading certificate file %s:%s",
2359                        conf->certificate_file,
2360                        ERR_error_string(ERR_get_error(), NULL));
2361                 return NULL;
2362         }
2363
2364         /* Load the CAs we trust */
2365 load_ca:
2366         if (conf->ca_file || conf->ca_path) {
2367                 if (!SSL_CTX_load_verify_locations(ctx, conf->ca_file, conf->ca_path)) {
2368                         ERROR("tls: SSL error %s", ERR_error_string(ERR_get_error(), NULL));
2369                         ERROR("tls: Error reading Trusted root CA list %s",conf->ca_file );
2370                         return NULL;
2371                 }
2372         }
2373         if (conf->ca_file && *conf->ca_file) SSL_CTX_set_client_CA_list(ctx, SSL_load_client_CA_file(conf->ca_file));
2374
2375         if (conf->private_key_file) {
2376                 if (!(SSL_CTX_use_PrivateKey_file(ctx, conf->private_key_file, type))) {
2377                         ERROR("Failed reading private key file %s:%s",
2378                                conf->private_key_file,
2379                                ERR_error_string(ERR_get_error(), NULL));
2380                         return NULL;
2381                 }
2382
2383                 /*
2384                  * Check if the loaded private key is the right one
2385                  */
2386                 if (!SSL_CTX_check_private_key(ctx)) {
2387                         ERROR("Private key does not match the certificate public key");
2388                         return NULL;
2389                 }
2390         }
2391
2392 #ifdef PSK_MAX_IDENTITY_LEN
2393 post_ca:
2394 #endif
2395
2396         /*
2397          *      We never want SSLv2 or SSLv3.
2398          */
2399         ctx_options |= SSL_OP_NO_SSLv2;
2400         ctx_options |= SSL_OP_NO_SSLv3;
2401
2402         /*
2403          *      As of 3.0.5, we always allow TLSv1.1 and TLSv1.2.
2404          *      Though they can be *globally* disabled if necessary.x
2405          */
2406 #ifdef SSL_OP_NO_TLSv1_1
2407         if (conf->disable_tlsv1_1) ctx_options |= SSL_OP_NO_TLSv1_1;
2408 #endif
2409 #ifdef SSL_OP_NO_TLSv1_2
2410         if (conf->disable_tlsv1_2) ctx_options |= SSL_OP_NO_TLSv1_2;
2411 #endif
2412
2413 #ifdef SSL_OP_NO_TICKET
2414         ctx_options |= SSL_OP_NO_TICKET ;
2415 #endif
2416
2417         /*
2418          *      SSL_OP_SINGLE_DH_USE must be used in order to prevent
2419          *      small subgroup attacks and forward secrecy. Always
2420          *      using
2421          *
2422          *      SSL_OP_SINGLE_DH_USE has an impact on the computer
2423          *      time needed during negotiation, but it is not very
2424          *      large.
2425          */
2426         ctx_options |= SSL_OP_SINGLE_DH_USE;
2427
2428         /*
2429          *      SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS to work around issues
2430          *      in Windows Vista client.
2431          *      http://www.openssl.org/~bodo/tls-cbc.txt
2432          *      http://www.nabble.com/(RADIATOR)-Radiator-Version-3.16-released-t2600070.html
2433          */
2434         ctx_options |= SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS;
2435
2436         SSL_CTX_set_options(ctx, ctx_options);
2437
2438         /*
2439          *      TODO: Set the RSA & DH
2440          *      SSL_CTX_set_tmp_rsa_callback(ctx, cbtls_rsa);
2441          *      SSL_CTX_set_tmp_dh_callback(ctx, cbtls_dh);
2442          */
2443
2444         /*
2445          *      set the message callback to identify the type of
2446          *      message.  For every new session, there can be a
2447          *      different callback argument.
2448          *
2449          *      SSL_CTX_set_msg_callback(ctx, cbtls_msg);
2450          */
2451
2452         /*
2453          *      Set eliptical curve crypto configuration.
2454          */
2455 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
2456 #ifndef OPENSSL_NO_ECDH
2457         if (set_ecdh_curve(ctx, conf->ecdh_curve) < 0) {
2458                 return NULL;
2459         }
2460 #endif
2461 #endif
2462
2463         /* Set Info callback */
2464         SSL_CTX_set_info_callback(ctx, cbtls_info);
2465
2466         /*
2467          *      Callbacks, etc. for session resumption.
2468          */
2469         if (conf->session_cache_enable) {
2470                 SSL_CTX_sess_set_new_cb(ctx, cbtls_new_session);
2471                 SSL_CTX_sess_set_get_cb(ctx, cbtls_get_session);
2472                 SSL_CTX_sess_set_remove_cb(ctx, cbtls_remove_session);
2473
2474                 SSL_CTX_set_quiet_shutdown(ctx, 1);
2475                 if (fr_tls_ex_index_vps < 0)
2476                         fr_tls_ex_index_vps = SSL_SESSION_get_ex_new_index(0, NULL, NULL, NULL, sess_free_vps);
2477         }
2478
2479         /*
2480          *      Check the certificates for revocation.
2481          */
2482 #ifdef X509_V_FLAG_CRL_CHECK
2483         if (conf->check_crl) {
2484                 certstore = SSL_CTX_get_cert_store(ctx);
2485                 if (certstore == NULL) {
2486                         ERROR("tls: SSL error %s", ERR_error_string(ERR_get_error(), NULL));
2487                         ERROR("tls: Error reading Certificate Store");
2488                         return NULL;
2489                 }
2490                 X509_STORE_set_flags(certstore, X509_V_FLAG_CRL_CHECK);
2491         }
2492 #endif
2493
2494         /*
2495          *      Set verify modes
2496          *      Always verify the peer certificate
2497          */
2498         verify_mode |= SSL_VERIFY_PEER;
2499         verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
2500         verify_mode |= SSL_VERIFY_CLIENT_ONCE;
2501         SSL_CTX_set_verify(ctx, verify_mode, cbtls_verify);
2502
2503         if (conf->verify_depth) {
2504                 SSL_CTX_set_verify_depth(ctx, conf->verify_depth);
2505         }
2506
2507         /* Load randomness */
2508         if (conf->random_file) {
2509                 if (!(RAND_load_file(conf->random_file, 1024*10))) {
2510                         ERROR("tls: SSL error %s", ERR_error_string(ERR_get_error(), NULL));
2511                         ERROR("tls: Error loading randomness");
2512                         return NULL;
2513                 }
2514         }
2515
2516         /*
2517          * Set the cipher list if we were told to
2518          */
2519         if (conf->cipher_list) {
2520                 if (!SSL_CTX_set_cipher_list(ctx, conf->cipher_list)) {
2521                         ERROR("tls: Error setting cipher list");
2522                         return NULL;
2523                 }
2524         }
2525
2526         /*
2527          *      Setup session caching
2528          */
2529         if (conf->session_cache_enable) {
2530                 /*
2531                  *      Create a unique context Id per EAP-TLS configuration.
2532                  */
2533                 if (conf->session_id_name) {
2534                         snprintf(conf->session_context_id,
2535                                  sizeof(conf->session_context_id),
2536                                  "FR eap %s",
2537                                  conf->session_id_name);
2538                 } else {
2539                         snprintf(conf->session_context_id,
2540                                  sizeof(conf->session_context_id),
2541                                  "FR eap %p", conf);
2542                 }
2543
2544                 /*
2545                  *      Cache it, and DON'T auto-clear it.
2546                  */
2547                 SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_SERVER | SSL_SESS_CACHE_NO_AUTO_CLEAR);
2548
2549                 SSL_CTX_set_session_id_context(ctx,
2550                                                (unsigned char *) conf->session_context_id,
2551                                                (unsigned int) strlen(conf->session_context_id));
2552
2553                 /*
2554                  *      Our timeout is in hours, this is in seconds.
2555                  */
2556                 SSL_CTX_set_timeout(ctx, conf->session_timeout * 3600);
2557
2558                 /*
2559                  *      Set the maximum number of entries in the
2560                  *      session cache.
2561                  */
2562                 SSL_CTX_sess_set_cache_size(ctx, conf->session_cache_size);
2563
2564         } else {
2565                 SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_OFF);
2566         }
2567
2568         return ctx;
2569 }
2570
2571
2572 /*
2573  *      Free TLS client/server config
2574  *      Should not be called outside this code, as a callback is
2575  *      added to automatically free the data when the CONF_SECTION
2576  *      is freed.
2577  */
2578 static int _tls_server_conf_free(fr_tls_server_conf_t *conf)
2579 {
2580         if (conf->ctx) SSL_CTX_free(conf->ctx);
2581
2582 #ifdef HAVE_OPENSSL_OCSP_H
2583         if (conf->ocsp_store) X509_STORE_free(conf->ocsp_store);
2584         conf->ocsp_store = NULL;
2585 #endif
2586
2587 #ifndef NDEBUG
2588         memset(conf, 0, sizeof(*conf));
2589 #endif
2590         return 0;
2591 }
2592
2593 static fr_tls_server_conf_t *tls_server_conf_alloc(TALLOC_CTX *ctx)
2594 {
2595         fr_tls_server_conf_t *conf;
2596
2597         conf = talloc_zero(ctx, fr_tls_server_conf_t);
2598         if (!conf) {
2599                 ERROR("Out of memory");
2600                 return NULL;
2601         }
2602
2603         talloc_set_destructor(conf, _tls_server_conf_free);
2604
2605         return conf;
2606 }
2607
2608 fr_tls_server_conf_t *tls_server_conf_parse(CONF_SECTION *cs)
2609 {
2610         fr_tls_server_conf_t *conf;
2611
2612         /*
2613          *      If cs has already been parsed there should be a cached copy
2614          *      of conf already stored, so just return that.
2615          */
2616         conf = cf_data_find(cs, "tls-conf");
2617         if (conf) {
2618                 DEBUG("Using cached TLS configuration from previous invocation");
2619                 return conf;
2620         }
2621
2622         conf = tls_server_conf_alloc(cs);
2623
2624         if (cf_section_parse(cs, conf, tls_server_config) < 0) {
2625         error:
2626                 talloc_free(conf);
2627                 return NULL;
2628         }
2629
2630         /*
2631          *      Save people from their own stupidity.
2632          */
2633         if (conf->fragment_size < 100) conf->fragment_size = 100;
2634
2635         if (!conf->private_key_file) {
2636                 ERROR("TLS Server requires a private key file");
2637                 goto error;
2638         }
2639
2640         if (!conf->certificate_file) {
2641                 ERROR("TLS Server requires a certificate file");
2642                 goto error;
2643         }
2644
2645         /*
2646          *      Initialize TLS
2647          */
2648         conf->ctx = tls_init_ctx(conf, 0);
2649         if (conf->ctx == NULL) {
2650                 goto error;
2651         }
2652
2653 #ifdef HAVE_OPENSSL_OCSP_H
2654         /*
2655          *      Initialize OCSP Revocation Store
2656          */
2657         if (conf->ocsp_enable) {
2658                 conf->ocsp_store = init_revocation_store(conf);
2659                 if (conf->ocsp_store == NULL) goto error;
2660         }
2661 #endif /*HAVE_OPENSSL_OCSP_H*/
2662         {
2663                 char *dh_file;
2664
2665                 memcpy(&dh_file, &conf->dh_file, sizeof(dh_file));
2666                 if (load_dh_params(conf->ctx, dh_file) < 0) {
2667                         goto error;
2668                 }
2669         }
2670
2671         if (conf->verify_tmp_dir) {
2672                 if (chmod(conf->verify_tmp_dir, S_IRWXU) < 0) {
2673                         ERROR("Failed changing permissions on %s: %s", conf->verify_tmp_dir, fr_syserror(errno));
2674                         goto error;
2675                 }
2676         }
2677
2678         if (conf->verify_client_cert_cmd && !conf->verify_tmp_dir) {
2679                 ERROR("You MUST set the verify directory in order to use verify_client_cmd");
2680                 goto error;
2681         }
2682
2683         /*
2684          *      Cache conf in cs in case we're asked to parse this again.
2685          */
2686         cf_data_add(cs, "tls-conf", conf, NULL);
2687
2688         return conf;
2689 }
2690
2691 fr_tls_server_conf_t *tls_client_conf_parse(CONF_SECTION *cs)
2692 {
2693         fr_tls_server_conf_t *conf;
2694
2695         conf = cf_data_find(cs, "tls-conf");
2696         if (conf) {
2697                 DEBUG("Using cached TLS configuration from previous invocation");
2698                 return conf;
2699         }
2700
2701         conf = tls_server_conf_alloc(cs);
2702
2703         if (cf_section_parse(cs, conf, tls_client_config) < 0) {
2704         error:
2705                 talloc_free(conf);
2706                 return NULL;
2707         }
2708
2709         /*
2710          *      Save people from their own stupidity.
2711          */
2712         if (conf->fragment_size < 100) conf->fragment_size = 100;
2713
2714         /*
2715          *      Initialize TLS
2716          */
2717         conf->ctx = tls_init_ctx(conf, 1);
2718         if (conf->ctx == NULL) {
2719                 goto error;
2720         }
2721
2722         {
2723                 char *dh_file;
2724
2725                 memcpy(&dh_file, &conf->dh_file, sizeof(dh_file));
2726                 if (load_dh_params(conf->ctx, dh_file) < 0) {
2727                         goto error;
2728                 }
2729         }
2730
2731         cf_data_add(cs, "tls-conf", conf, NULL);
2732
2733         return conf;
2734 }
2735
2736 int tls_success(tls_session_t *ssn, REQUEST *request)
2737 {
2738         VALUE_PAIR *vp, *vps = NULL;
2739         fr_tls_server_conf_t *conf;
2740         TALLOC_CTX *talloc_ctx;
2741
2742         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssn->ssl, FR_TLS_EX_INDEX_CONF);
2743         rad_assert(conf != NULL);
2744
2745         talloc_ctx = SSL_get_ex_data(ssn->ssl, FR_TLS_EX_INDEX_TALLOC);
2746
2747         /*
2748          *      If there's no session resumption, delete the entry
2749          *      from the cache.  This means either it's disabled
2750          *      globally for this SSL context, OR we were told to
2751          *      disable it for this user.
2752          *
2753          *      This also means you can't turn it on just for one
2754          *      user.
2755          */
2756         if ((!ssn->allow_session_resumption) ||
2757             (((vp = pairfind(request->config_items, PW_ALLOW_SESSION_RESUMPTION, 0, TAG_ANY)) != NULL) &&
2758              (vp->vp_integer == 0))) {
2759                 SSL_CTX_remove_session(ssn->ctx,
2760                                        ssn->ssl->session);
2761                 ssn->allow_session_resumption = false;
2762
2763                 /*
2764                  *      If we're in a resumed session and it's
2765                  *      not allowed,
2766                  */
2767                 if (SSL_session_reused(ssn->ssl)) {
2768                         RDEBUG("FAIL: Forcibly stopping session resumption as it is not allowed");
2769                         return -1;
2770                 }
2771         /*
2772          *      Else resumption IS allowed, so we store the
2773          *      user data in the cache.
2774          */
2775         } else if (!SSL_session_reused(ssn->ssl)) {
2776                 size_t size;
2777                 VALUE_PAIR **certs;
2778                 char buffer[2 * MAX_SESSION_SIZE + 1];
2779
2780                 size = ssn->ssl->session->session_id_length;
2781                 if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
2782
2783                 fr_bin2hex(buffer, ssn->ssl->session->session_id, size);
2784
2785                 vp = paircopy_by_num(talloc_ctx, request->reply->vps, PW_USER_NAME, 0, TAG_ANY);
2786                 if (vp) pairadd(&vps, vp);
2787
2788                 vp = paircopy_by_num(talloc_ctx, request->packet->vps, PW_STRIPPED_USER_NAME, 0, TAG_ANY);
2789                 if (vp) pairadd(&vps, vp);
2790
2791                 vp = paircopy_by_num(talloc_ctx, request->packet->vps, PW_STRIPPED_USER_DOMAIN, 0, TAG_ANY);
2792                 if (vp) pairadd(&vps, vp);
2793
2794                 vp = paircopy_by_num(talloc_ctx, request->reply->vps, PW_CHARGEABLE_USER_IDENTITY, 0, TAG_ANY);
2795                 if (vp) pairadd(&vps, vp);
2796
2797                 vp = paircopy_by_num(talloc_ctx, request->reply->vps, PW_CACHED_SESSION_POLICY, 0, TAG_ANY);
2798                 if (vp) pairadd(&vps, vp);
2799
2800                 certs = (VALUE_PAIR **)SSL_get_ex_data(ssn->ssl, fr_tls_ex_index_certs);
2801
2802                 /*
2803                  *      Hmm... the certs should probably be session data.
2804                  */
2805                 if (certs) {
2806                         /*
2807                          *      @todo: some go into reply, others into
2808                          *      request
2809                          */
2810                         pairadd(&vps, paircopy(talloc_ctx, *certs));
2811                 }
2812
2813                 if (vps) {
2814                         RDEBUG2("Saving session %s vps %p in the cache", buffer, vps);
2815                         SSL_SESSION_set_ex_data(ssn->ssl->session, fr_tls_ex_index_vps, vps);
2816                         if (conf->session_cache_path) {
2817                                 /* write the VPs to the cache file */
2818                                 char filename[256], buf[1024];
2819                                 FILE *vp_file;
2820
2821                                 snprintf(filename, sizeof(filename), "%s%c%s.vps", conf->session_cache_path,
2822                                          FR_DIR_SEP, buffer);
2823                                 vp_file = fopen(filename, "w");
2824                                 if (vp_file == NULL) {
2825                                         RDEBUG2("Could not write session VPs to persistent cache: %s",
2826                                                 fr_syserror(errno));
2827                                 } else {
2828                                         vp_cursor_t cursor;
2829                                         /* generate a dummy user-style entry which is easy to read back */
2830                                         fprintf(vp_file, "# SSL cached session\n");
2831                                         fprintf(vp_file, "%s\n", buffer);
2832                                         for (vp = fr_cursor_init(&cursor, &vps);
2833                                              vp;
2834                                              vp = fr_cursor_next(&cursor)) {
2835                                                 vp_prints(buf, sizeof(buf), vp);
2836                                                 fprintf(vp_file, "\t%s,\n", buf);
2837                                         }
2838                                         fclose(vp_file);
2839                                 }
2840                         }
2841                 } else {
2842                         RDEBUG2("No information to cache: session caching will be disabled for session %s", buffer);
2843                         SSL_CTX_remove_session(ssn->ctx, ssn->ssl->session);
2844                 }
2845
2846         /*
2847          *      Else the session WAS allowed.  Copy the cached reply.
2848          */
2849         } else {
2850                 size_t size;
2851                 char buffer[2 * MAX_SESSION_SIZE + 1];
2852
2853                 size = ssn->ssl->session->session_id_length;
2854                 if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
2855
2856                 fr_bin2hex(buffer, ssn->ssl->session->session_id, size);
2857
2858                 vps = SSL_SESSION_get_ex_data(ssn->ssl->session, fr_tls_ex_index_vps);
2859                 if (!vps) {
2860                         RWDEBUG("No information in cached session %s", buffer);
2861                         return -1;
2862                 } else {
2863                         vp_cursor_t cursor;
2864
2865                         RDEBUG("Adding cached attributes for session %s:", buffer);
2866                         rdebug_pair_list(L_DBG_LVL_1, request, vps, NULL);
2867                         for (vp = fr_cursor_init(&cursor, &vps);
2868                              vp;
2869                              vp = fr_cursor_next(&cursor)) {
2870                                 /*
2871                                  *      TLS-* attrs get added back to
2872                                  *      the request list.
2873                                  */
2874                                 if ((vp->da->vendor == 0) &&
2875                                     (vp->da->attr >= PW_TLS_CERT_SERIAL) &&
2876                                     (vp->da->attr <= PW_TLS_CLIENT_CERT_SUBJECT_ALT_NAME_UPN)) {
2877                                         pairadd(&request->packet->vps, paircopyvp(request->packet, vp));
2878                                 } else {
2879                                         pairadd(&request->reply->vps, paircopyvp(request->reply, vp));
2880                                 }
2881                         }
2882
2883                         if (conf->session_cache_path) {
2884                                 /* "touch" the cached session/vp file */
2885                                 char filename[256];
2886
2887                                 snprintf(filename, sizeof(filename), "%s%c%s.asn1",
2888                                         conf->session_cache_path, FR_DIR_SEP, buffer);
2889                                 utime(filename, NULL);
2890                                 snprintf(filename, sizeof(filename), "%s%c%s.vps",
2891                                         conf->session_cache_path, FR_DIR_SEP, buffer);
2892                                 utime(filename, NULL);
2893                         }
2894
2895                         /*
2896                          *      Mark the request as resumed.
2897                          */
2898                         pairmake_packet("EAP-Session-Resumed", "1", T_OP_SET);
2899                 }
2900         }
2901
2902         return 0;
2903 }
2904
2905
2906 void tls_fail(tls_session_t *ssn)
2907 {
2908         /*
2909          *      Force the session to NOT be cached.
2910          */
2911         SSL_CTX_remove_session(ssn->ctx, ssn->ssl->session);
2912 }
2913
2914 fr_tls_status_t tls_application_data(tls_session_t *ssn,
2915                                      REQUEST *request)
2916
2917 {
2918         int err;
2919
2920         /*
2921          *      Decrypt the complete record.
2922          */
2923         err = BIO_write(ssn->into_ssl, ssn->dirty_in.data,
2924                         ssn->dirty_in.used);
2925         if (err != (int) ssn->dirty_in.used) {
2926                 record_init(&ssn->dirty_in);
2927                 RDEBUG("Failed writing %d to SSL BIO: %d", ssn->dirty_in.used, err);
2928                 return FR_TLS_FAIL;
2929         }
2930
2931         /*
2932          *      Clear the dirty buffer now that we are done with it
2933          *      and init the clean_out buffer to store decrypted data
2934          */
2935         record_init(&ssn->dirty_in);
2936         record_init(&ssn->clean_out);
2937
2938         /*
2939          *      Read (and decrypt) the tunneled data from the
2940          *      SSL session, and put it into the decrypted
2941          *      data buffer.
2942          */
2943         err = SSL_read(ssn->ssl, ssn->clean_out.data, sizeof(ssn->clean_out.data));
2944         if (err < 0) {
2945                 int code;
2946
2947                 RDEBUG("SSL_read Error");
2948
2949                 code = SSL_get_error(ssn->ssl, err);
2950                 switch (code) {
2951                 case SSL_ERROR_WANT_READ:
2952                         DEBUG("Error in fragmentation logic: SSL_WANT_READ");
2953                         return FR_TLS_MORE_FRAGMENTS;
2954
2955                 case SSL_ERROR_WANT_WRITE:
2956                         DEBUG("Error in fragmentation logic: SSL_WANT_WRITE");
2957                         break;
2958
2959                 default:
2960                         DEBUG("Error in fragmentation logic: %s", ERR_error_string(code, NULL));
2961
2962                         /*
2963                          *      FIXME: Call int_ssl_check?
2964                          */
2965                         break;
2966                 }
2967                 return FR_TLS_FAIL;
2968         }
2969
2970         if (err == 0) RWDEBUG("No data inside of the tunnel");
2971
2972         /*
2973          *      Passed all checks, successfully decrypted data
2974          */
2975         ssn->clean_out.used = err;
2976
2977         return FR_TLS_OK;
2978 }
2979
2980
2981 /*
2982  * Acknowledge received is for one of the following messages sent earlier
2983  * 1. Handshake completed Message, so now send, EAP-Success
2984  * 2. Alert Message, now send, EAP-Failure
2985  * 3. Fragment Message, now send, next Fragment
2986  */
2987 fr_tls_status_t tls_ack_handler(tls_session_t *ssn, REQUEST *request)
2988 {
2989         RDEBUG2("Received TLS ACK");
2990
2991         if (ssn == NULL){
2992                 RERROR("FAIL: Unexpected ACK received.  Could not obtain session information");
2993                 return FR_TLS_INVALID;
2994         }
2995         if (ssn->info.initialized == 0) {
2996                 RDEBUG("No SSL info available. Waiting for more SSL data");
2997                 return FR_TLS_REQUEST;
2998         }
2999         if ((ssn->info.content_type == handshake) && (ssn->info.origin == 0)) {
3000                 RERROR("FAIL: ACK without earlier message");
3001                 return FR_TLS_INVALID;
3002         }
3003
3004         switch (ssn->info.content_type) {
3005         case alert:
3006                 RDEBUG2("ACK alert");
3007                 return FR_TLS_FAIL;
3008
3009         case handshake:
3010                 if ((ssn->info.handshake_type == handshake_finished) && (ssn->dirty_out.used == 0)) {
3011                         RDEBUG2("ACK handshake is finished");
3012
3013                         /*
3014                          *      From now on all the content is
3015                          *      application data set it here as nobody else
3016                          *      sets it.
3017                          */
3018                         ssn->info.content_type = application_data;
3019                         return FR_TLS_SUCCESS;
3020                 } /* else more data to send */
3021
3022                 RDEBUG2("ACK handshake fragment handler");
3023                 /* Fragmentation handler, send next fragment */
3024                 return FR_TLS_REQUEST;
3025
3026         case application_data:
3027                 RDEBUG2("ACK handshake fragment handler in application data");
3028                 return FR_TLS_REQUEST;
3029
3030                 /*
3031                  *      For the rest of the conditions, switch over
3032                  *      to the default section below.
3033                  */
3034         default:
3035                 RERROR("Invalid ACK received: %d", ssn->info.content_type);
3036
3037                 return FR_TLS_INVALID;
3038         }
3039 }
3040
3041 #endif  /* WITH_TLS */
3042