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 static int _tls_session_free(tls_session_t *ssn)
 214 {
 215         /*
 216          *      Free any opaque TTLS or PEAP data.
 217          */
 218         if ((ssn->opaque) && (ssn->free_opaque)) {
 219                 ssn->free_opaque(ssn->opaque);
 220                 ssn->opaque = NULL;
 221         }
 222
 223         session_close(ssn);
 224
 225         return 0;
 226 }
 227
 228 tls_session_t *tls_new_client_session(TALLOC_CTX *ctx, fr_tls_server_conf_t *conf, int fd)
 229 {
 230         int verify_mode;
 231         tls_session_t *ssn = NULL;
 232         REQUEST *request;
 233
 234         ssn = talloc_zero(ctx, tls_session_t);
 235         if (!ssn) return NULL;
 236
 237         talloc_set_destructor(ssn, _tls_session_free);
 238
 239         ssn->ctx = conf->ctx;
 240
 241         SSL_CTX_set_mode(ssn->ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER | SSL_MODE_AUTO_RETRY);
 242
 243         ssn->ssl = SSL_new(ssn->ctx);
 244         if (!ssn->ssl) {
 245                 talloc_free(ssn);
 246                 return NULL;
 247         }
 248
 249         request = request_alloc(ssn);
 250         SSL_set_ex_data(ssn->ssl, FR_TLS_EX_INDEX_REQUEST, (void *)request);
 251
 252         /*
 253          *      Add the message callback to identify what type of
 254          *      message/handshake is passed
 255          */
 256         SSL_set_msg_callback(ssn->ssl, cbtls_msg);
 257         SSL_set_msg_callback_arg(ssn->ssl, ssn);
 258         SSL_set_info_callback(ssn->ssl, cbtls_info);
 259
 260         /*
 261          *      Always verify the peer certificate.
 262          */
 263         DEBUG2("Requiring Server certificate");
 264         verify_mode = SSL_VERIFY_PEER;
 265         verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
 266         SSL_set_verify(ssn->ssl, verify_mode, cbtls_verify);
 267
 268         SSL_set_ex_data(ssn->ssl, FR_TLS_EX_INDEX_CONF, (void *)conf);
 269         SSL_set_ex_data(ssn->ssl, FR_TLS_EX_INDEX_SSN, (void *)ssn);
 270         SSL_set_fd(ssn->ssl, fd);
 271         if (SSL_connect(ssn->ssl) <= 0) {
 272                 int err;
 273                 while ((err = ERR_get_error())) {
 274                         ERROR("tls: %s", ERR_error_string(err, NULL));
 275                 }
 276                 talloc_free(ssn);
 277
 278                 return NULL;
 279         }
 280
 281         ssn->offset = conf->fragment_size;
 282
 283         return ssn;
 284 }
 285
 286 tls_session_t *tls_new_session(TALLOC_CTX *ctx, fr_tls_server_conf_t *conf, REQUEST *request, bool client_cert)
 287 {
 288         tls_session_t *state = NULL;
 289         SSL *new_tls = NULL;
 290         int             verify_mode = 0;
 291         VALUE_PAIR      *vp;
 292
 293         rad_assert(request != NULL);
 294
 295         /*
 296          *      Manually flush the sessions every so often.  If HALF
 297          *      of the session lifetime has passed since we last
 298          *      flushed, then flush it again.
 299          *
 300          *      FIXME: Also do it every N sessions?
 301          */
 302         if (conf->session_cache_enable &&
 303             ((conf->session_last_flushed + ((int)conf->session_timeout * 1800)) <= request->timestamp)){
 304                 RDEBUG2("Flushing SSL sessions (of #%ld)",
 305                         SSL_CTX_sess_number(conf->ctx));
 306
 307                 SSL_CTX_flush_sessions(conf->ctx, request->timestamp);
 308                 conf->session_last_flushed = request->timestamp;
 309         }
 310
 311         if ((new_tls = SSL_new(conf->ctx)) == NULL) {
 312                 ERROR("SSL: Error creating new SSL: %s",
 313                        ERR_error_string(ERR_get_error(), NULL));
 314                 return NULL;
 315         }
 316
 317         /* We use the SSL's "app_data" to indicate a call-back */
 318         SSL_set_app_data(new_tls, NULL);
 319
 320         if ((state = talloc_zero(ctx, tls_session_t)) == NULL) {
 321                 ERROR("SSL: Error allocating memory for SSL state");
 322                 return NULL;
 323         }
 324         session_init(state);
 325         talloc_set_destructor(state, _tls_session_free);
 326
 327         state->ctx = conf->ctx;
 328         state->ssl = new_tls;
 329
 330         /*
 331          *      Initialize callbacks
 332          */
 333         state->record_init = record_init;
 334         state->record_close = record_close;
 335         state->record_plus = record_plus;
 336         state->record_minus = record_minus;
 337
 338         /*
 339          *      Create & hook the BIOs to handle the dirty side of the
 340          *      SSL.  This is *very important* as we want to handle
 341          *      the transmission part.  Now the only IO interface
 342          *      that SSL is aware of, is our defined BIO buffers.
 343          *
 344          *      This means that all SSL IO is done to/from memory,
 345          *      and we can update those BIOs from the packets we've
 346          *      received.
 347          */
 348         state->into_ssl = BIO_new(BIO_s_mem());
 349         state->from_ssl = BIO_new(BIO_s_mem());
 350         SSL_set_bio(state->ssl, state->into_ssl, state->from_ssl);
 351
 352         /*
 353          *      Add the message callback to identify what type of
 354          *      message/handshake is passed
 355          */
 356         SSL_set_msg_callback(new_tls, cbtls_msg);
 357         SSL_set_msg_callback_arg(new_tls, state);
 358         SSL_set_info_callback(new_tls, cbtls_info);
 359
 360         /*
 361          *      In Server mode we only accept.
 362          */
 363         SSL_set_accept_state(state->ssl);
 364
 365         /*
 366          *      Verify the peer certificate, if asked.
 367          */
 368         if (client_cert) {
 369                 RDEBUG2("Requiring client certificate");
 370                 verify_mode = SSL_VERIFY_PEER;
 371                 verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
 372                 verify_mode |= SSL_VERIFY_CLIENT_ONCE;
 373         }
 374         SSL_set_verify(state->ssl, verify_mode, cbtls_verify);
 375
 376         SSL_set_ex_data(state->ssl, FR_TLS_EX_INDEX_CONF, (void *)conf);
 377         SSL_set_ex_data(state->ssl, FR_TLS_EX_INDEX_SSN, (void *)state);
 378         state->length_flag = conf->include_length;
 379
 380         /*
 381          *      We use default fragment size, unless the Framed-MTU
 382          *      tells us it's too big.  Note that we do NOT account
 383          *      for the EAP-TLS headers if conf->fragment_size is
 384          *      large, because that config item looks to be confusing.
 385          *
 386          *      i.e. it should REALLY be called MTU, and the code here
 387          *      should figure out what that means for TLS fragment size.
 388          *      asking the administrator to know the internal details
 389          *      of EAP-TLS in order to calculate fragment sizes is
 390          *      just too much.
 391          */
 392         state->offset = conf->fragment_size;
 393         vp = pairfind(request->packet->vps, PW_FRAMED_MTU, 0, TAG_ANY);
 394         if (vp && (vp->vp_integer > 100) && (vp->vp_integer < state->offset)) {
 395                 state->offset = vp->vp_integer;
 396         }
 397
 398         if (conf->session_cache_enable) state->allow_session_resumption = true; /* otherwise it's false */
 399
 400         RDEBUG2("Initiate");
 401
 402         return state;
 403 }
 404
 405 /*
 406  *      Print out some text describing the error.
 407  */
 408 static int int_ssl_check(REQUEST *request, SSL *s, int ret, char const *text)
 409 {
 410         int e;
 411         unsigned long l;
 412
 413         if ((l = ERR_get_error()) != 0) {
 414                 char const *p = ERR_error_string(l, NULL);
 415
 416                 if (request && p) REDEBUG("SSL says: %s", p);
 417         }
 418         e = SSL_get_error(s, ret);
 419
 420         switch (e) {
 421                 /*
 422                  *      These seem to be harmless and already "dealt
 423                  *      with" by our non-blocking environment. NB:
 424                  *      "ZERO_RETURN" is the clean "error"
 425                  *      indicating a successfully closed SSL
 426                  *      tunnel. We let this happen because our IO
 427                  *      loop should not appear to have broken on
 428                  *      this condition - and outside the IO loop, the
 429                  *      "shutdown" state is checked.
 430                  *
 431                  *      Don't print anything if we ignore the error.
 432                  */
 433         case SSL_ERROR_NONE:
 434         case SSL_ERROR_WANT_READ:
 435         case SSL_ERROR_WANT_WRITE:
 436         case SSL_ERROR_WANT_X509_LOOKUP:
 437         case SSL_ERROR_ZERO_RETURN:
 438                 break;
 439
 440                 /*
 441                  *      These seem to be indications of a genuine
 442                  *      error that should result in the SSL tunnel
 443                  *      being regarded as "dead".
 444                  */
 445         case SSL_ERROR_SYSCALL:
 446                 ERROR("SSL: %s failed in a system call (%d), TLS session fails.",
 447                        text, ret);
 448                 return 0;
 449
 450         case SSL_ERROR_SSL:
 451                 ERROR("SSL: %s failed inside of TLS (%d), TLS session fails.",
 452                        text, ret);
 453                 return 0;
 454
 455         default:
 456                 /*
 457                  *      For any other errors that (a) exist, and (b)
 458                  *      crop up - we need to interpret what to do with
 459                  *      them - so "politely inform" the caller that
 460                  *      the code needs updating here.
 461                  */
 462                 ERROR("SSL: FATAL SSL error ..... %d\n", e);
 463                 return 0;
 464         }
 465
 466         return 1;
 467 }
 468
 469 /*
 470  * We are the server, we always get the dirty data
 471  * (Handshake data is also considered as dirty data)
 472  * During handshake, since SSL API handles itself,
 473  * After clean-up, dirty_out will be filled with
 474  * the data required for handshaking. So we check
 475  * if dirty_out is empty then we simply send it back.
 476  * As of now, if handshake is successful, then we keep going,
 477  * otherwise we fail.
 478  *
 479  * Fill the Bio with the dirty data to clean it
 480  * Get the cleaned data from SSL, if it is not Handshake data
 481  */
 482 int tls_handshake_recv(REQUEST *request, tls_session_t *ssn)
 483 {
 484         int err;
 485
 486         if (ssn->invalid_hb_used) return 0;
 487
 488         err = BIO_write(ssn->into_ssl, ssn->dirty_in.data, ssn->dirty_in.used);
 489         if (err != (int) ssn->dirty_in.used) {
 490                 RDEBUG("Failed writing %d to SSL BIO: %d", ssn->dirty_in.used,
 491                         err);
 492                 record_init(&ssn->dirty_in);
 493                 return 0;
 494         }
 495         record_init(&ssn->dirty_in);
 496
 497         err = SSL_read(ssn->ssl, ssn->clean_out.data + ssn->clean_out.used,
 498                        sizeof(ssn->clean_out.data) - ssn->clean_out.used);
 499         if (err > 0) {
 500                 ssn->clean_out.used += err;
 501                 return 1;
 502         }
 503
 504         if (!int_ssl_check(request, ssn->ssl, err, "SSL_read")) {
 505                 return 0;
 506         }
 507
 508         /* Some Extra STATE information for easy debugging */
 509         if (SSL_is_init_finished(ssn->ssl)) {
 510                 DEBUG2("SSL Connection Established\n");
 511         }
 512         if (SSL_in_init(ssn->ssl)) {
 513                 DEBUG2("In SSL Handshake Phase\n");
 514         }
 515         if (SSL_in_before(ssn->ssl)) {
 516                 DEBUG2("Before SSL Handshake Phase\n");
 517         }
 518         if (SSL_in_accept_init(ssn->ssl)) {
 519                 DEBUG2("In SSL Accept mode \n");
 520         }
 521         if (SSL_in_connect_init(ssn->ssl)) {
 522                 DEBUG2("In SSL Connect mode \n");
 523         }
 524
 525         err = BIO_ctrl_pending(ssn->from_ssl);
 526         if (err > 0) {
 527                 err = BIO_read(ssn->from_ssl, ssn->dirty_out.data,
 528                                sizeof(ssn->dirty_out.data));
 529                 if (err > 0) {
 530                         ssn->dirty_out.used = err;
 531
 532                 } else if (BIO_should_retry(ssn->from_ssl)) {
 533                         record_init(&ssn->dirty_in);
 534                         DEBUG2("  tls: Asking for more data in tunnel");
 535                         return 1;
 536
 537                 } else {
 538                         int_ssl_check(request, ssn->ssl, err, "BIO_read");
 539                         record_init(&ssn->dirty_in);
 540                         return 0;
 541                 }
 542         } else {
 543                 DEBUG2("SSL Application Data");
 544                 /* Its clean application data, do whatever we want */
 545                 record_init(&ssn->clean_out);
 546         }
 547
 548         /* We are done with dirty_in, reinitialize it */
 549         record_init(&ssn->dirty_in);
 550         return 1;
 551 }
 552
 553 /*
 554  *      Take cleartext user data, and encrypt it into the output buffer,
 555  *      to send to the client at the other end of the SSL connection.
 556  */
 557 int tls_handshake_send(REQUEST *request, tls_session_t *ssn)
 558 {
 559         int err;
 560
 561         /*
 562          *      If there's un-encrypted data in 'clean_in', then write
 563          *      that data to the SSL session, and then call the BIO function
 564          *      to get that encrypted data from the SSL session, into
 565          *      a buffer which we can then package into an EAP packet.
 566          *
 567          *      Based on Server's logic this clean_in is expected to
 568          *      contain the data to send to the client.
 569          */
 570         if (ssn->clean_in.used > 0) {
 571                 int written;
 572
 573                 written = SSL_write(ssn->ssl, ssn->clean_in.data, ssn->clean_in.used);
 574                 record_minus(&ssn->clean_in, NULL, written);
 575
 576                 /* Get the dirty data from Bio to send it */
 577                 err = BIO_read(ssn->from_ssl, ssn->dirty_out.data,
 578                                sizeof(ssn->dirty_out.data));
 579                 if (err > 0) {
 580                         ssn->dirty_out.used = err;
 581                 } else {
 582                         int_ssl_check(request, ssn->ssl, err, "handshake_send");
 583                 }
 584         }
 585
 586         return 1;
 587 }
 588
 589 void session_init(tls_session_t *ssn)
 590 {
 591         ssn->ssl = NULL;
 592         ssn->into_ssl = ssn->from_ssl = NULL;
 593         record_init(&ssn->clean_in);
 594         record_init(&ssn->clean_out);
 595         record_init(&ssn->dirty_in);
 596         record_init(&ssn->dirty_out);
 597
 598         memset(&ssn->info, 0, sizeof(ssn->info));
 599
 600         ssn->offset = 0;
 601         ssn->fragment = 0;
 602         ssn->tls_msg_len = 0;
 603         ssn->length_flag = 0;
 604         ssn->opaque = NULL;
 605         ssn->free_opaque = NULL;
 606 }
 607
 608 void session_close(tls_session_t *ssn)
 609 {
 610         SSL_set_quiet_shutdown(ssn->ssl, 1);
 611         SSL_shutdown(ssn->ssl);
 612
 613         if (ssn->ssl) {
 614                 SSL_free(ssn->ssl);
 615                 ssn->ssl = NULL;
 616         }
 617
 618         record_close(&ssn->clean_in);
 619         record_close(&ssn->clean_out);
 620         record_close(&ssn->dirty_in);
 621         record_close(&ssn->dirty_out);
 622         session_init(ssn);
 623 }
 624
 625 static void record_init(record_t *rec)
 626 {
 627         rec->used = 0;
 628 }
 629
 630 static void record_close(record_t *rec)
 631 {
 632         rec->used = 0;
 633 }
 634
 635
 636 /*
 637  *      Copy data to the intermediate buffer, before we send
 638  *      it somewhere.
 639  */
 640 static unsigned int record_plus(record_t *rec, void const *ptr,
 641                                 unsigned int size)
 642 {
 643         unsigned int added = MAX_RECORD_SIZE - rec->used;
 644
 645         if(added > size)
 646                 added = size;
 647         if(added == 0)
 648                 return 0;
 649         memcpy(rec->data + rec->used, ptr, added);
 650         rec->used += added;
 651         return added;
 652 }
 653
 654 /*
 655  *      Take data from the buffer, and give it to the caller.
 656  */
 657 static unsigned int record_minus(record_t *rec, void *ptr,
 658                                  unsigned int size)
 659 {
 660         unsigned int taken = rec->used;
 661
 662         if(taken > size)
 663                 taken = size;
 664         if(taken == 0)
 665                 return 0;
 666         if(ptr)
 667                 memcpy(ptr, rec->data, taken);
 668         rec->used -= taken;
 669
 670         /*
 671          *      This is pretty bad...
 672          */
 673         if(rec->used > 0)
 674                 memmove(rec->data, rec->data + taken, rec->used);
 675         return taken;
 676 }
 677
 678 void tls_session_information(tls_session_t *tls_session)
 679 {
 680         char const *str_write_p, *str_version, *str_content_type = "";
 681         char const *str_details1 = "", *str_details2= "";
 682         REQUEST *request;
 683
 684         /*
 685          *      Don't print this out in the normal course of
 686          *      operations.
 687          */
 688         if (debug_flag == 0) {
 689                 return;
 690         }
 691
 692         str_write_p = tls_session->info.origin ? ">>>" : "<<<";
 693
 694         switch (tls_session->info.version) {
 695         case SSL2_VERSION:
 696                 str_version = "SSL 2.0";
 697                 break;
 698         case SSL3_VERSION:
 699                 str_version = "SSL 3.0 ";
 700                 break;
 701         case TLS1_VERSION:
 702                 str_version = "TLS 1.0 ";
 703                 break;
 704         default:
 705                 str_version = "Unknown TLS version";
 706                 break;
 707         }
 708
 709         if (tls_session->info.version == SSL3_VERSION ||
 710             tls_session->info.version == TLS1_VERSION) {
 711                 switch (tls_session->info.content_type) {
 712                 case SSL3_RT_CHANGE_CIPHER_SPEC:
 713                         str_content_type = "ChangeCipherSpec";
 714                         break;
 715
 716                 case SSL3_RT_ALERT:
 717                         str_content_type = "Alert";
 718                         break;
 719
 720                 case SSL3_RT_HANDSHAKE:
 721                         str_content_type = "Handshake";
 722                         break;
 723
 724                 case SSL3_RT_APPLICATION_DATA:
 725                         str_content_type = "ApplicationData";
 726                         break;
 727
 728                 default:
 729                         str_content_type = "UnknownContentType";
 730                         break;
 731                 }
 732
 733                 if (tls_session->info.content_type == SSL3_RT_ALERT) {
 734                         str_details1 = ", ???";
 735
 736                         if (tls_session->info.record_len == 2) {
 737
 738                                 switch (tls_session->info.alert_level) {
 739                                 case SSL3_AL_WARNING:
 740                                         str_details1 = ", warning";
 741                                         break;
 742                                 case SSL3_AL_FATAL:
 743                                         str_details1 = ", fatal";
 744                                         break;
 745                                 }
 746
 747                                 str_details2 = " ???";
 748                                 switch (tls_session->info.alert_description) {
 749                                 case SSL3_AD_CLOSE_NOTIFY:
 750                                         str_details2 = " close_notify";
 751                                         break;
 752
 753                                 case SSL3_AD_UNEXPECTED_MESSAGE:
 754                                         str_details2 = " unexpected_message";
 755                                         break;
 756
 757                                 case SSL3_AD_BAD_RECORD_MAC:
 758                                         str_details2 = " bad_record_mac";
 759                                         break;
 760
 761                                 case TLS1_AD_DECRYPTION_FAILED:
 762                                         str_details2 = " decryption_failed";
 763                                         break;
 764
 765                                 case TLS1_AD_RECORD_OVERFLOW:
 766                                         str_details2 = " record_overflow";
 767                                         break;
 768
 769                                 case SSL3_AD_DECOMPRESSION_FAILURE:
 770                                         str_details2 = " decompression_failure";
 771                                         break;
 772
 773                                 case SSL3_AD_HANDSHAKE_FAILURE:
 774                                         str_details2 = " handshake_failure";
 775                                         break;
 776
 777                                 case SSL3_AD_BAD_CERTIFICATE:
 778                                         str_details2 = " bad_certificate";
 779                                         break;
 780
 781                                 case SSL3_AD_UNSUPPORTED_CERTIFICATE:
 782                                         str_details2 = " unsupported_certificate";
 783                                         break;
 784
 785                                 case SSL3_AD_CERTIFICATE_REVOKED:
 786                                         str_details2 = " certificate_revoked";
 787                                         break;
 788
 789                                 case SSL3_AD_CERTIFICATE_EXPIRED:
 790                                         str_details2 = " certificate_expired";
 791                                         break;
 792
 793                                 case SSL3_AD_CERTIFICATE_UNKNOWN:
 794                                         str_details2 = " certificate_unknown";
 795                                         break;
 796
 797                                 case SSL3_AD_ILLEGAL_PARAMETER:
 798                                         str_details2 = " illegal_parameter";
 799                                         break;
 800
 801                                 case TLS1_AD_UNKNOWN_CA:
 802                                         str_details2 = " unknown_ca";
 803                                         break;
 804
 805                                 case TLS1_AD_ACCESS_DENIED:
 806                                         str_details2 = " access_denied";
 807                                         break;
 808
 809                                 case TLS1_AD_DECODE_ERROR:
 810                                         str_details2 = " decode_error";
 811                                         break;
 812
 813                                 case TLS1_AD_DECRYPT_ERROR:
 814                                         str_details2 = " decrypt_error";
 815                                         break;
 816
 817                                 case TLS1_AD_EXPORT_RESTRICTION:
 818                                         str_details2 = " export_restriction";
 819                                         break;
 820
 821                                 case TLS1_AD_PROTOCOL_VERSION:
 822                                         str_details2 = " protocol_version";
 823                                         break;
 824
 825                                 case TLS1_AD_INSUFFICIENT_SECURITY:
 826                                         str_details2 = " insufficient_security";
 827                                         break;
 828
 829                                 case TLS1_AD_INTERNAL_ERROR:
 830                                         str_details2 = " internal_error";
 831                                         break;
 832
 833                                 case TLS1_AD_USER_CANCELLED:
 834                                         str_details2 = " user_canceled";
 835                                         break;
 836
 837                                 case TLS1_AD_NO_RENEGOTIATION:
 838                                         str_details2 = " no_renegotiation";
 839                                         break;
 840                                 }
 841                         }
 842                 }
 843
 844                 if (tls_session->info.content_type == SSL3_RT_HANDSHAKE) {
 845                         str_details1 = "???";
 846
 847                         if (tls_session->info.record_len > 0) switch (tls_session->info.handshake_type) {
 848                         case SSL3_MT_HELLO_REQUEST:
 849                                 str_details1 = ", HelloRequest";
 850                                 break;
 851
 852                         case SSL3_MT_CLIENT_HELLO:
 853                                 str_details1 = ", ClientHello";
 854                                 break;
 855
 856                         case SSL3_MT_SERVER_HELLO:
 857                                 str_details1 = ", ServerHello";
 858                                 break;
 859
 860                         case SSL3_MT_CERTIFICATE:
 861                                 str_details1 = ", Certificate";
 862                                 break;
 863
 864                         case SSL3_MT_SERVER_KEY_EXCHANGE:
 865                                 str_details1 = ", ServerKeyExchange";
 866                                 break;
 867
 868                         case SSL3_MT_CERTIFICATE_REQUEST:
 869                                 str_details1 = ", CertificateRequest";
 870                                 break;
 871
 872                         case SSL3_MT_SERVER_DONE:
 873                                 str_details1 = ", ServerHelloDone";
 874                                 break;
 875
 876                         case SSL3_MT_CERTIFICATE_VERIFY:
 877                                 str_details1 = ", CertificateVerify";
 878                                 break;
 879
 880                         case SSL3_MT_CLIENT_KEY_EXCHANGE:
 881                                 str_details1 = ", ClientKeyExchange";
 882                                 break;
 883
 884                         case SSL3_MT_FINISHED:
 885                                 str_details1 = ", Finished";
 886                                 break;
 887                         }
 888                 }
 889         }
 890
 891         snprintf(tls_session->info.info_description,
 892                  sizeof(tls_session->info.info_description),
 893                  "%s %s%s [length %04lx]%s%s\n",
 894                  str_write_p, str_version, str_content_type,
 895                  (unsigned long)tls_session->info.record_len,
 896                  str_details1, str_details2);
 897
 898         request = SSL_get_ex_data(tls_session->ssl, FR_TLS_EX_INDEX_REQUEST);
 899         if (request) {
 900                 RDEBUG2("%s", tls_session->info.info_description);
 901         } else {
 902                 DEBUG2("%s", tls_session->info.info_description);
 903         }
 904 }
 905
 906 static CONF_PARSER cache_config[] = {
 907         { "enable", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, session_cache_enable), "no" },
 908         { "lifetime", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, session_timeout), "24" },
 909         { "max_entries", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, session_cache_size), "255" },
 910         { "name", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, session_id_name), NULL },
 911         { "persist_dir", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, session_cache_path), NULL },
 912         { NULL, -1, 0, NULL, NULL }        /* end the list */
 913 };
 914
 915 static CONF_PARSER verify_config[] = {
 916         { "tmpdir", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, verify_tmp_dir), NULL },
 917         { "client", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, verify_client_cert_cmd), NULL },
 918         { NULL, -1, 0, NULL, NULL }        /* end the list */
 919 };
 920
 921 #ifdef HAVE_OPENSSL_OCSP_H
 922 static CONF_PARSER ocsp_config[] = {
 923         { "enable", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, ocsp_enable), "no" },
 924         { "override_cert_url", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, ocsp_override_url), "no" },
 925         { "url", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, ocsp_url), NULL },
 926         { "use_nonce", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, ocsp_use_nonce), "yes" },
 927         { "timeout", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, ocsp_timeout), "yes" },
 928         { "softfail", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, ocsp_softfail), "no" },
 929         { NULL, -1, 0, NULL, NULL }        /* end the list */
 930 };
 931 #endif
 932
 933 static CONF_PARSER tls_server_config[] = {
 934         { "rsa_key_exchange", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, rsa_key), "no" },
 935         { "dh_key_exchange", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, dh_key), "yes" },
 936         { "rsa_key_length", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, rsa_key_length), "512" },
 937         { "dh_key_length", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, dh_key_length), "512" },
 938         { "verify_depth", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, verify_depth), "0" },
 939         { "CA_path", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT | PW_TYPE_DEPRECATED, fr_tls_server_conf_t, ca_path), NULL },
 940         { "ca_path", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_path), NULL },
 941         { "pem_file_type", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, file_type), "yes" },
 942         { "private_key_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, private_key_file), NULL },
 943         { "certificate_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, certificate_file), NULL },
 944         { "CA_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT | PW_TYPE_DEPRECATED, fr_tls_server_conf_t, ca_file), NULL },
 945         { "ca_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_file), NULL },
 946         { "private_key_password", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, fr_tls_server_conf_t, private_key_password), NULL },
 947 #ifdef PSK_MAX_IDENTITY_LEN
 948         { "psk_identity", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, psk_identity), NULL },
 949         { "psk_hexphrase", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, fr_tls_server_conf_t, psk_password), NULL },
 950         { "psk_query", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, psk_query), NULL },
 951 #endif
 952         { "dh_file", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, dh_file), NULL },
 953         { "random_file", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, random_file), NULL },
 954         { "fragment_size", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, fragment_size), "1024" },
 955         { "include_length", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, include_length), "yes" },
 956         { "check_crl", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, check_crl), "no" },
 957         { "allow_expired_crl", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, allow_expired_crl), NULL },
 958         { "check_cert_cn", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_cn), NULL },
 959         { "cipher_list", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, cipher_list), NULL },
 960         { "check_cert_issuer", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_issuer), NULL },
 961         { "require_client_cert", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, require_client_cert), NULL },
 962
 963 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
 964 #ifndef OPENSSL_NO_ECDH
 965         { "ecdh_curve", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, ecdh_curve), "prime256v1" },
 966 #endif
 967 #endif
 968
 969         { "disable_tlsv1_1", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1_1), NULL },
 970         { "disable_tlsv1_2", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1_2), NULL },
 971
 972         { "cache", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) cache_config },
 973
 974         { "verify", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) verify_config },
 975
 976 #ifdef HAVE_OPENSSL_OCSP_H
 977         { "ocsp", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) ocsp_config },
 978 #endif
 979
 980         { NULL, -1, 0, NULL, NULL }        /* end the list */
 981 };
 982
 983
 984 static CONF_PARSER tls_client_config[] = {
 985         { "rsa_key_exchange", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, rsa_key), "no" },
 986         { "dh_key_exchange", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, dh_key), "yes" },
 987         { "rsa_key_length", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, rsa_key_length), "512" },
 988         { "dh_key_length", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, dh_key_length), "512" },
 989         { "verify_depth", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, verify_depth), "0" },
 990         { "ca_path", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_path), NULL },
 991         { "pem_file_type", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, file_type), "yes" },
 992         { "private_key_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, private_key_file), NULL },
 993         { "certificate_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, certificate_file), NULL },
 994         { "ca_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_file), NULL },
 995         { "private_key_password", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, fr_tls_server_conf_t, private_key_password), NULL },
 996         { "dh_file", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, dh_file), NULL },
 997         { "random_file", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, random_file), NULL },
 998         { "fragment_size", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, fragment_size), "1024" },
 999         { "include_length", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, include_length), "yes" },
1000         { "check_crl", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, check_crl), "no" },
1001         { "check_cert_cn", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_cn), NULL },
1002         { "cipher_list", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, cipher_list), NULL },
1003         { "check_cert_issuer", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_issuer), NULL },
1004
1005 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
1006 #ifndef OPENSSL_NO_ECDH
1007         { "ecdh_curve", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, ecdh_curve), "prime256v1" },
1008 #endif
1009 #endif
1010
1011 #ifdef SSL_OP_NO_TLSv1_1
1012         { "disable_tlsv1_1", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1_1), NULL },
1013 #endif
1014 #ifdef SSL_OP_NO_TLSv1_2
1015         { "disable_tlsv1_2", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1_2), NULL },
1016 #endif
1017
1018         { NULL, -1, 0, NULL, NULL }        /* end the list */
1019 };
1020
1021
1022 /*
1023  *      TODO: Check for the type of key exchange * like conf->dh_key
1024  */
1025 static int load_dh_params(SSL_CTX *ctx, char *file)
1026 {
1027         DH *dh = NULL;
1028         BIO *bio;
1029
1030         if (!file) return 0;
1031
1032         if ((bio = BIO_new_file(file, "r")) == NULL) {
1033                 ERROR("tls: Unable to open DH file - %s", file);
1034                 return -1;
1035         }
1036
1037         dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
1038         BIO_free(bio);
1039         if (!dh) {
1040                 WARN("tls: Unable to set DH parameters.  DH cipher suites may not work!");
1041                 WARN("Fix this by running the OpenSSL command listed in eap.conf");
1042                 return 0;
1043         }
1044
1045         if (SSL_CTX_set_tmp_dh(ctx, dh) < 0) {
1046                 ERROR("tls: Unable to set DH parameters");
1047                 DH_free(dh);
1048                 return -1;
1049         }
1050
1051         DH_free(dh);
1052         return 0;
1053 }
1054
1055
1056 /*
1057  *      Print debugging messages, and free data.
1058  *
1059  *      FIXME: Write sessions to some long-term storage, so that
1060  *             session resumption can still occur after the server
1061  *             restarts.
1062  */
1063 #define MAX_SESSION_SIZE (256)
1064
1065 static void cbtls_remove_session(SSL_CTX *ctx, SSL_SESSION *sess)
1066 {
1067         size_t size;
1068         char buffer[2 * MAX_SESSION_SIZE + 1];
1069         fr_tls_server_conf_t *conf;
1070
1071         size = sess->session_id_length;
1072         if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
1073
1074         fr_bin2hex(buffer, sess->session_id, size);
1075
1076         DEBUG2("  SSL: Removing session %s from the cache", buffer);
1077         conf = (fr_tls_server_conf_t *)SSL_CTX_get_app_data(ctx);
1078         if (conf && conf->session_cache_path) {
1079                 int rv;
1080                 char filename[256];
1081
1082                 /* remove session and any cached VPs */
1083                 snprintf(filename, sizeof(filename), "%s%c%s.asn1",
1084                          conf->session_cache_path, FR_DIR_SEP, buffer);
1085                 rv = unlink(filename);
1086                 if (rv != 0) {
1087                         DEBUG2("  SSL: could not remove persisted session file %s: %s", filename, fr_syserror(errno));
1088                 }
1089                 /* VPs might be absent; might not have been written to disk yet */
1090                 snprintf(filename, sizeof(filename), "%s%c%s.vps",
1091                          conf->session_cache_path, FR_DIR_SEP, buffer);
1092                 unlink(filename);
1093         }
1094
1095         return;
1096 }
1097
1098 static int cbtls_new_session(SSL *ssl, SSL_SESSION *sess)
1099 {
1100         size_t size;
1101         char buffer[2 * MAX_SESSION_SIZE + 1];
1102         fr_tls_server_conf_t *conf;
1103         unsigned char *sess_blob = NULL;
1104
1105         size = sess->session_id_length;
1106         if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
1107
1108         fr_bin2hex(buffer, sess->session_id, size);
1109
1110         DEBUG2("  SSL: adding session %s to cache", buffer);
1111
1112         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_CONF);
1113         if (conf && conf->session_cache_path) {
1114                 int fd, rv, todo, blob_len;
1115                 char filename[256];
1116                 unsigned char *p;
1117
1118                 /* find out what length data we need */
1119                 blob_len = i2d_SSL_SESSION(sess, NULL);
1120                 if (blob_len < 1) {
1121                         /* something went wrong */
1122                         DEBUG2("  SSL: could not find buffer length to persist session");
1123                         return 0;
1124                 }
1125
1126
1127                 /* Do not convert to TALLOC - Thread safety */
1128                 /* alloc and convert to ASN.1 */
1129                 sess_blob = malloc(blob_len);
1130                 if (!sess_blob) {
1131                         DEBUG2("  SSL: could not allocate buffer len=%d to persist session", blob_len);
1132                         return 0;
1133                 }
1134                 /* openssl mutates &p */
1135                 p = sess_blob;
1136                 rv = i2d_SSL_SESSION(sess, &p);
1137                 if (rv != blob_len) {
1138                         DEBUG2("  SSL: could not persist session");
1139                         goto error;
1140                 }
1141
1142                 /* open output file */
1143                 snprintf(filename, sizeof(filename), "%s%c%s.asn1",
1144                          conf->session_cache_path, FR_DIR_SEP, buffer);
1145                 fd = open(filename, O_RDWR|O_CREAT|O_EXCL, 0600);
1146                 if (fd < 0) {
1147                         DEBUG2("  SSL: could not open session file %s: %s", filename, fr_syserror(errno));
1148                         goto error;
1149                 }
1150
1151                 todo = blob_len;
1152                 p = sess_blob;
1153                 while (todo > 0) {
1154                         rv = write(fd, p, todo);
1155                         if (rv < 1) {
1156                                 DEBUG2("  SSL: failed writing session: %s", fr_syserror(errno));
1157                                 close(fd);
1158                                 goto error;
1159                         }
1160                         p += rv;
1161                         todo -= rv;
1162                 }
1163                 close(fd);
1164                 DEBUG2("  SSL: wrote session %s to %s len=%d", buffer, filename, blob_len);
1165         }
1166
1167 error:
1168         free(sess_blob);
1169
1170         return 0;
1171 }
1172
1173 static SSL_SESSION *cbtls_get_session(SSL *ssl,
1174                                       unsigned char *data, int len,
1175                                       int *copy)
1176 {
1177         size_t size;
1178         char buffer[2 * MAX_SESSION_SIZE + 1];
1179         fr_tls_server_conf_t *conf;
1180         TALLOC_CTX *talloc_ctx;
1181
1182         SSL_SESSION *sess = NULL;
1183         unsigned char *sess_data = NULL;
1184         PAIR_LIST *pairlist = NULL;
1185
1186         size = len;
1187         if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
1188
1189         fr_bin2hex(buffer, data, size);
1190
1191         DEBUG2("  SSL: Client requested cached session %s", buffer);
1192
1193         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_CONF);
1194         talloc_ctx = SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_TALLOC);
1195         if (conf && conf->session_cache_path) {
1196                 int rv, fd, todo;
1197                 char filename[256];
1198                 unsigned char *p;
1199                 struct stat st;
1200                 VALUE_PAIR *vp;
1201
1202                 /* read in the cached VPs from the .vps file */
1203                 snprintf(filename, sizeof(filename), "%s%c%s.vps",
1204                          conf->session_cache_path, FR_DIR_SEP, buffer);
1205                 rv = pairlist_read(NULL, filename, &pairlist, 1);
1206                 if (rv < 0) {
1207                         /* not safe to un-persist a session w/o VPs */
1208                         DEBUG2("  SSL: could not load persisted VPs for session %s", buffer);
1209                         goto err;
1210                 }
1211
1212                 /* load the actual SSL session */
1213                 snprintf(filename, sizeof(filename), "%s%c%s.asn1",
1214                          conf->session_cache_path, FR_DIR_SEP, buffer);
1215                 fd = open(filename, O_RDONLY);
1216                 if (fd < 0) {
1217                         DEBUG2("  SSL: could not find persisted session file %s: %s", filename, fr_syserror(errno));
1218                         goto err;
1219                 }
1220
1221                 rv = fstat(fd, &st);
1222                 if (rv < 0) {
1223                         DEBUG2("  SSL: could not stat persisted session file %s: %s", filename, fr_syserror(errno));
1224                         close(fd);
1225                         goto err;
1226                 }
1227
1228                 sess_data = talloc_array(NULL, unsigned char, st.st_size);
1229                 if (!sess_data) {
1230                   DEBUG2("  SSL: could not alloc buffer for persisted session len=%d", (int) st.st_size);
1231                         close(fd);
1232                         goto err;
1233                 }
1234
1235                 p = sess_data;
1236                 todo = st.st_size;
1237                 while (todo > 0) {
1238                         rv = read(fd, p, todo);
1239                         if (rv < 1) {
1240                                 DEBUG2("  SSL: could not read from persisted session: %s", fr_syserror(errno));
1241                                 close(fd);
1242                                 goto err;
1243                         }
1244                         todo -= rv;
1245                         p += rv;
1246                 }
1247                 close(fd);
1248
1249                 /* openssl mutates &p */
1250                 p = sess_data;
1251                 sess = d2i_SSL_SESSION(NULL, (unsigned char const **)(void **) &p, st.st_size);
1252
1253                 if (!sess) {
1254                         DEBUG2("  SSL: OpenSSL failed to load persisted session: %s", ERR_error_string(ERR_get_error(), NULL));
1255                         goto err;
1256                 }
1257
1258                 /* cache the VPs into the session */
1259                 vp = paircopy(talloc_ctx, pairlist->reply);
1260                 SSL_SESSION_set_ex_data(sess, fr_tls_ex_index_vps, vp);
1261                 DEBUG2("  SSL: Successfully restored session %s", buffer);
1262         }
1263 err:
1264         if (sess_data) talloc_free(sess_data);
1265         if (pairlist) pairlist_free(&pairlist);
1266
1267         *copy = 0;
1268         return sess;
1269 }
1270
1271 #ifdef HAVE_OPENSSL_OCSP_H
1272 /*
1273  * This function extracts the OCSP Responder URL
1274  * from an existing x509 certificate.
1275  */
1276 static int ocsp_parse_cert_url(X509 *cert, char **phost, char **pport,
1277                                char **ppath, int *pssl)
1278 {
1279         int i;
1280
1281         AUTHORITY_INFO_ACCESS *aia;
1282         ACCESS_DESCRIPTION *ad;
1283
1284         aia = X509_get_ext_d2i(cert, NID_info_access, NULL, NULL);
1285
1286         for (i = 0; i < sk_ACCESS_DESCRIPTION_num(aia); i++) {
1287                 ad = sk_ACCESS_DESCRIPTION_value(aia, i);
1288                 if (OBJ_obj2nid(ad->method) == NID_ad_OCSP) {
1289                         if (ad->location->type == GEN_URI) {
1290                           if(OCSP_parse_url((char *) ad->location->d.ia5->data,
1291                                                   phost, pport, ppath, pssl))
1292                                         return 1;
1293                         }
1294                 }
1295         }
1296         return 0;
1297 }
1298
1299 /*
1300  * This function sends a OCSP request to a defined OCSP responder
1301  * and checks the OCSP response for correctness.
1302  */
1303
1304 /* Maximum leeway in validity period: default 5 minutes */
1305 #define MAX_VALIDITY_PERIOD     (5 * 60)
1306
1307 static int ocsp_check(X509_STORE *store, X509 *issuer_cert, X509 *client_cert,
1308                       fr_tls_server_conf_t *conf)
1309 {
1310         OCSP_CERTID *certid;
1311         OCSP_REQUEST *req;
1312         OCSP_RESPONSE *resp = NULL;
1313         OCSP_BASICRESP *bresp = NULL;
1314         char *host = NULL;
1315         char *port = NULL;
1316         char *path = NULL;
1317         char hostheader[1024];
1318         int use_ssl = -1;
1319         long nsec = MAX_VALIDITY_PERIOD, maxage = -1;
1320         BIO *cbio, *bio_out;
1321         int ocsp_ok = 0;
1322         int status ;
1323         ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
1324         int reason;
1325 #if OPENSSL_VERSION_NUMBER >= 0x1000003f
1326         OCSP_REQ_CTX *ctx;
1327         int rc;
1328         struct timeval now;
1329         struct timeval when;
1330 #endif
1331
1332         /*
1333          * Create OCSP Request
1334          */
1335         certid = OCSP_cert_to_id(NULL, client_cert, issuer_cert);
1336         req = OCSP_REQUEST_new();
1337         OCSP_request_add0_id(req, certid);
1338         if(conf->ocsp_use_nonce) {
1339                 OCSP_request_add1_nonce(req, NULL, 8);
1340         }
1341
1342         /*
1343          * Send OCSP Request and get OCSP Response
1344          */
1345
1346         /* Get OCSP responder URL */
1347         if (conf->ocsp_override_url) {
1348                 char *url;
1349
1350                 memcpy(&url, &conf->ocsp_url, sizeof(url));
1351                 /* Reading the libssl src, they do a strdup on the URL, so it could of been const *sigh* */
1352                 OCSP_parse_url(url, &host, &port, &path, &use_ssl);
1353         }
1354         else {
1355                 ocsp_parse_cert_url(client_cert, &host, &port, &path, &use_ssl);
1356         }
1357
1358         if (!host || !port || !path) {
1359                 DEBUG2("[ocsp] - Host / port / path missing.  Not doing OCSP");
1360                 ocsp_ok = 2;
1361                 goto ocsp_skip;
1362         }
1363
1364         DEBUG2("[ocsp] --> Responder URL = http://%s:%s%s", host, port, path);
1365
1366         /* Check host and port length are sane, then create Host: HTTP header */
1367         if ((strlen(host) + strlen(port) + 2) > sizeof(hostheader)) {
1368                 ERROR("OCSP Host and port too long");
1369                 goto ocsp_skip;
1370         }
1371         snprintf(hostheader, sizeof(hostheader), "%s:%s", host, port);
1372
1373         /* Setup BIO socket to OCSP responder */
1374         cbio = BIO_new_connect(host);
1375
1376         bio_out = NULL;
1377         if (debug_flag) {
1378                 if (default_log.dst == L_DST_STDOUT) {
1379                         bio_out = BIO_new_fp(stdout, BIO_NOCLOSE);
1380                 } else if (default_log.dst == L_DST_STDERR) {
1381                         bio_out = BIO_new_fp(stderr, BIO_NOCLOSE);
1382                 }
1383         }
1384
1385         BIO_set_conn_port(cbio, port);
1386 #if OPENSSL_VERSION_NUMBER < 0x1000003f
1387         BIO_do_connect(cbio);
1388
1389         /* Send OCSP request and wait for response */
1390         resp = OCSP_sendreq_bio(cbio, path, req);
1391         if (!resp) {
1392                 ERROR("Couldn't get OCSP response");
1393                 ocsp_ok = 2;
1394                 goto ocsp_end;
1395         }
1396 #else
1397         if (conf->ocsp_timeout)
1398                 BIO_set_nbio(cbio, 1);
1399
1400         rc = BIO_do_connect(cbio);
1401         if ((rc <= 0) && ((!conf->ocsp_timeout) || !BIO_should_retry(cbio))) {
1402                 ERROR("Couldn't connect to OCSP responder");
1403                 ocsp_ok = 2;
1404                 goto ocsp_end;
1405         }
1406
1407         ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
1408         if (!ctx) {
1409                 ERROR("Couldn't create OCSP request");
1410                 ocsp_ok = 2;
1411                 goto ocsp_end;
1412         }
1413
1414         if (!OCSP_REQ_CTX_add1_header(ctx, "Host", hostheader)) {
1415                 ERROR("Couldn't set Host header");
1416                 ocsp_ok = 2;
1417                 goto ocsp_end;
1418         }
1419
1420         if (!OCSP_REQ_CTX_set1_req(ctx, req)) {
1421                 ERROR("Couldn't add data to OCSP request");
1422                 ocsp_ok = 2;
1423                 goto ocsp_end;
1424         }
1425
1426         gettimeofday(&when, NULL);
1427         when.tv_sec += conf->ocsp_timeout;
1428
1429         do {
1430                 rc = OCSP_sendreq_nbio(&resp, ctx);
1431                 if (conf->ocsp_timeout) {
1432                         gettimeofday(&now, NULL);
1433                         if (!timercmp(&now, &when, <))
1434                                 break;
1435                 }
1436         } while ((rc == -1) && BIO_should_retry(cbio));
1437
1438         if (conf->ocsp_timeout && (rc == -1) && BIO_should_retry(cbio)) {
1439                 ERROR("OCSP response timed out");
1440                 ocsp_ok = 2;
1441                 goto ocsp_end;
1442         }
1443
1444         OCSP_REQ_CTX_free(ctx);
1445
1446         if (rc == 0) {
1447                 ERROR("Couldn't get OCSP response");
1448                 ocsp_ok = 2;
1449                 goto ocsp_end;
1450         }
1451 #endif
1452
1453         /* Verify OCSP response status */
1454         status = OCSP_response_status(resp);
1455         DEBUG2("[ocsp] --> Response status: %s",OCSP_response_status_str(status));
1456         if(status != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
1457                 ERROR("OCSP response status: %s", OCSP_response_status_str(status));
1458                 goto ocsp_end;
1459         }
1460         bresp = OCSP_response_get1_basic(resp);
1461         if(conf->ocsp_use_nonce && OCSP_check_nonce(req, bresp)!=1) {
1462                 ERROR("OCSP response has wrong nonce value");
1463                 goto ocsp_end;
1464         }
1465         if(OCSP_basic_verify(bresp, NULL, store, 0)!=1){
1466                 ERROR("Couldn't verify OCSP basic response");
1467                 goto ocsp_end;
1468         }
1469
1470         /*      Verify OCSP cert status */
1471         if(!OCSP_resp_find_status(bresp, certid, &status, &reason,
1472                                                       &rev, &thisupd, &nextupd)) {
1473                 ERROR("No Status found.\n");
1474                 goto ocsp_end;
1475         }
1476
1477         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
1478                 if (bio_out) {
1479                         BIO_puts(bio_out, "WARNING: Status times invalid.\n");
1480                         ERR_print_errors(bio_out);
1481                 }
1482                 goto ocsp_end;
1483         }
1484
1485
1486         if (bio_out) {
1487                 BIO_puts(bio_out, "\tThis Update: ");
1488                 ASN1_GENERALIZEDTIME_print(bio_out, thisupd);
1489                 BIO_puts(bio_out, "\n");
1490                 if (nextupd) {
1491                         BIO_puts(bio_out, "\tNext Update: ");
1492                         ASN1_GENERALIZEDTIME_print(bio_out, nextupd);
1493                         BIO_puts(bio_out, "\n");
1494                 }
1495         }
1496
1497         switch (status) {
1498         case V_OCSP_CERTSTATUS_GOOD:
1499                 DEBUG2("[oscp] --> Cert status: good");
1500                 ocsp_ok = 1;
1501                 break;
1502
1503         default:
1504                 /* REVOKED / UNKNOWN */
1505                 DEBUG2("[ocsp] --> Cert status: %s",OCSP_cert_status_str(status));
1506                 if (reason != -1)
1507                         DEBUG2("[ocsp] --> Reason: %s", OCSP_crl_reason_str(reason));
1508
1509                 if (bio_out) {
1510                         BIO_puts(bio_out, "\tRevocation Time: ");
1511                         ASN1_GENERALIZEDTIME_print(bio_out, rev);
1512                         BIO_puts(bio_out, "\n");
1513                 }
1514                 break;
1515         }
1516
1517 ocsp_end:
1518         /* Free OCSP Stuff */
1519         OCSP_REQUEST_free(req);
1520         OCSP_RESPONSE_free(resp);
1521         free(host);
1522         free(port);
1523         free(path);
1524         BIO_free_all(cbio);
1525         if (bio_out) BIO_free(bio_out);
1526         OCSP_BASICRESP_free(bresp);
1527
1528  ocsp_skip:
1529         switch (ocsp_ok) {
1530         case 1:
1531                 DEBUG2("[ocsp] --> Certificate is valid!");
1532                 break;
1533         case 2:
1534                 if (conf->ocsp_softfail) {
1535                         DEBUG2("[ocsp] --> Unable to check certificate; assuming valid");
1536                         DEBUG2("[ocsp] --> Warning! This may be insecure");
1537                         ocsp_ok = 1;
1538                 } else {
1539                         DEBUG2("[ocsp] --> Unable to check certificate; failing!");
1540                         ocsp_ok = 0;
1541                 }
1542                 break;
1543         default:
1544                 DEBUG2("[ocsp] --> Certificate has been expired/revoked!");
1545                 break;
1546         }
1547
1548         return ocsp_ok;
1549 }
1550 #endif  /* HAVE_OPENSSL_OCSP_H */
1551
1552 /*
1553  *      For creating certificate attributes.
1554  */
1555 static char const *cert_attr_names[8][2] = {
1556   { "TLS-Client-Cert-Serial",           "TLS-Cert-Serial" },
1557   { "TLS-Client-Cert-Expiration",       "TLS-Cert-Expiration" },
1558   { "TLS-Client-Cert-Subject",          "TLS-Cert-Subject" },
1559   { "TLS-Client-Cert-Issuer",           "TLS-Cert-Issuer" },
1560   { "TLS-Client-Cert-Common-Name",      "TLS-Cert-Common-Name" },
1561   { "TLS-Client-Cert-Subject-Alt-Name-Email",   "TLS-Cert-Subject-Alt-Name-Email" },
1562   { "TLS-Client-Cert-Subject-Alt-Name-Dns",     "TLS-Cert-Subject-Alt-Name-Dns" },
1563   { "TLS-Client-Cert-Subject-Alt-Name-Upn",     "TLS-Cert-Subject-Alt-Name-Upn" }
1564 };
1565
1566 #define FR_TLS_SERIAL           (0)
1567 #define FR_TLS_EXPIRATION       (1)
1568 #define FR_TLS_SUBJECT          (2)
1569 #define FR_TLS_ISSUER           (3)
1570 #define FR_TLS_CN               (4)
1571 #define FR_TLS_SAN_EMAIL        (5)
1572 #define FR_TLS_SAN_DNS          (6)
1573 #define FR_TLS_SAN_UPN          (7)
1574
1575 /*
1576  *      Before trusting a certificate, you must make sure that the
1577  *      certificate is 'valid'. There are several steps that your
1578  *      application can take in determining if a certificate is
1579  *      valid. Commonly used steps are:
1580  *
1581  *      1.Verifying the certificate's signature, and verifying that
1582  *      the certificate has been issued by a trusted Certificate
1583  *      Authority.
1584  *
1585  *      2.Verifying that the certificate is valid for the present date
1586  *      (i.e. it is being presented within its validity dates).
1587  *
1588  *      3.Verifying that the certificate has not been revoked by its
1589  *      issuing Certificate Authority, by checking with respect to a
1590  *      Certificate Revocation List (CRL).
1591  *
1592  *      4.Verifying that the credentials presented by the certificate
1593  *      fulfill additional requirements specific to the application,
1594  *      such as with respect to access control lists or with respect
1595  *      to OCSP (Online Certificate Status Processing).
1596  *
1597  *      NOTE: This callback will be called multiple times based on the
1598  *      depth of the root certificate chain
1599  */
1600 int cbtls_verify(int ok, X509_STORE_CTX *ctx)
1601 {
1602         char subject[1024]; /* Used for the subject name */
1603         char issuer[1024]; /* Used for the issuer name */
1604         char attribute[1024];
1605         char value[1024];
1606         char common_name[1024];
1607         char cn_str[1024];
1608         char buf[64];
1609         X509 *client_cert;
1610         X509_CINF *client_inf;
1611         STACK_OF(X509_EXTENSION) *ext_list;
1612         SSL *ssl;
1613         int err, depth, lookup, loc;
1614         fr_tls_server_conf_t *conf;
1615         int my_ok = ok;
1616         REQUEST *request;
1617         ASN1_INTEGER *sn = NULL;
1618         ASN1_TIME *asn_time = NULL;
1619         VALUE_PAIR **certs;
1620         char **identity;
1621 #ifdef HAVE_OPENSSL_OCSP_H
1622         X509_STORE *ocsp_store = NULL;
1623         X509 *issuer_cert;
1624 #endif
1625         VALUE_PAIR *vp;
1626         TALLOC_CTX *talloc_ctx;
1627
1628         client_cert = X509_STORE_CTX_get_current_cert(ctx);
1629         err = X509_STORE_CTX_get_error(ctx);
1630         depth = X509_STORE_CTX_get_error_depth(ctx);
1631
1632         lookup = depth;
1633
1634         /*
1635          *      Log client/issuing cert.  If there's an error, log
1636          *      issuing cert.
1637          */
1638         if ((lookup > 1) && !my_ok) lookup = 1;
1639
1640         /*
1641          * Retrieve the pointer to the SSL of the connection currently treated
1642          * and the application specific data stored into the SSL object.
1643          */
1644         ssl = X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
1645         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_CONF);
1646         if (!conf) return 1;
1647
1648         request = (REQUEST *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_REQUEST);
1649         rad_assert(request != NULL);
1650         certs = (VALUE_PAIR **)SSL_get_ex_data(ssl, fr_tls_ex_index_certs);
1651
1652         identity = (char **)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_IDENTITY);
1653 #ifdef HAVE_OPENSSL_OCSP_H
1654         ocsp_store = (X509_STORE *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_STORE);
1655 #endif
1656
1657         talloc_ctx = SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_TALLOC);
1658
1659         /*
1660          *      Get the Serial Number
1661          */
1662         buf[0] = '\0';
1663         sn = X509_get_serialNumber(client_cert);
1664
1665         RDEBUG2("TLS Verify adding attributes");
1666         RINDENT();
1667
1668         /*
1669          *      For this next bit, we create the attributes *only* if
1670          *      we're at the client or issuing certificate, AND we
1671          *      have a user identity.  i.e. we don't create the
1672          *      attributes for RadSec connections.
1673          */
1674         if (certs && identity &&
1675             (lookup <= 1) && sn && ((size_t) sn->length < (sizeof(buf) / 2))) {
1676                 char *p = buf;
1677                 int i;
1678
1679                 for (i = 0; i < sn->length; i++) {
1680                         sprintf(p, "%02x", (unsigned int)sn->data[i]);
1681                         p += 2;
1682                 }
1683                 vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_SERIAL][lookup], buf, T_OP_SET);
1684                 rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1685         }
1686
1687
1688         /*
1689          *      Get the Expiration Date
1690          */
1691         buf[0] = '\0';
1692         asn_time = X509_get_notAfter(client_cert);
1693         if (certs && identity && (lookup <= 1) && asn_time &&
1694             (asn_time->length < (int) sizeof(buf))) {
1695                 memcpy(buf, (char*) asn_time->data, asn_time->length);
1696                 buf[asn_time->length] = '\0';
1697                 vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_EXPIRATION][lookup], buf, T_OP_SET);
1698                 rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1699         }
1700
1701         /*
1702          *      Get the Subject & Issuer
1703          */
1704         subject[0] = issuer[0] = '\0';
1705         X509_NAME_oneline(X509_get_subject_name(client_cert), subject,
1706                           sizeof(subject));
1707         subject[sizeof(subject) - 1] = '\0';
1708         if (certs && identity && (lookup <= 1) && subject[0]) {
1709                 vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_SUBJECT][lookup], subject, T_OP_SET);
1710                 rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1711         }
1712
1713         X509_NAME_oneline(X509_get_issuer_name(ctx->current_cert), issuer,
1714                           sizeof(issuer));
1715         issuer[sizeof(issuer) - 1] = '\0';
1716         if (certs && identity && (lookup <= 1) && issuer[0]) {
1717                 vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_ISSUER][lookup], issuer, T_OP_SET);
1718                 rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1719         }
1720
1721         /*
1722          *      Get the Common Name, if there is a subject.
1723          */
1724         X509_NAME_get_text_by_NID(X509_get_subject_name(client_cert),
1725                                   NID_commonName, common_name, sizeof(common_name));
1726         common_name[sizeof(common_name) - 1] = '\0';
1727         if (certs && identity && (lookup <= 1) && common_name[0] && subject[0]) {
1728                 vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_CN][lookup], common_name, T_OP_SET);
1729                 rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1730         }
1731
1732         /*
1733          *      Get the RFC822 Subject Alternative Name
1734          */
1735         loc = X509_get_ext_by_NID(client_cert, NID_subject_alt_name, 0);
1736         if (certs && (lookup <= 1) && (loc >= 0)) {
1737                 X509_EXTENSION *ext = NULL;
1738                 GENERAL_NAMES *names = NULL;
1739                 int i;
1740
1741                 if ((ext = X509_get_ext(client_cert, loc)) &&
1742                     (names = X509V3_EXT_d2i(ext))) {
1743                         for (i = 0; i < sk_GENERAL_NAME_num(names); i++) {
1744                                 GENERAL_NAME *name = sk_GENERAL_NAME_value(names, i);
1745
1746                                 switch (name->type) {
1747 #ifdef GEN_EMAIL
1748                                 case GEN_EMAIL:
1749                                         vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_SAN_EMAIL][lookup],
1750                                                       (char *) ASN1_STRING_data(name->d.rfc822Name), T_OP_SET);
1751                                         rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1752                                         break;
1753 #endif  /* GEN_EMAIL */
1754 #ifdef GEN_DNS
1755                                 case GEN_DNS:
1756                                         vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_SAN_DNS][lookup],
1757                                                       (char *) ASN1_STRING_data(name->d.dNSName), T_OP_SET);
1758                                         rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1759                                         break;
1760 #endif  /* GEN_DNS */
1761 #ifdef GEN_OTHERNAME
1762                                 case GEN_OTHERNAME:
1763                                         /* look for a MS UPN */
1764                                         if (NID_ms_upn == OBJ_obj2nid(name->d.otherName->type_id)) {
1765                                             /* we've got a UPN - Must be ASN1-encoded UTF8 string */
1766                                             if (name->d.otherName->value->type == V_ASN1_UTF8STRING) {
1767                                                     vp = pairmake(talloc_ctx, certs, cert_attr_names[FR_TLS_SAN_UPN][lookup],
1768                                                                   (char *) ASN1_STRING_data(name->d.otherName->value->value.utf8string), T_OP_SET);
1769                                                     rdebug_pair(L_DBG_LVL_2, request, vp, "&request:");
1770                                                 break;
1771                                             } else {
1772                                                 RWARN("Invalid UPN in Subject Alt Name (should be UTF-8)");
1773                                                 break;
1774                                             }
1775                                         }
1776                                         break;
1777 #endif  /* GEN_OTHERNAME */
1778                                 default:
1779                                         /* XXX TODO handle other SAN types */
1780                                         break;
1781                                 }
1782                         }
1783                 }
1784                 if (names != NULL)
1785                         sk_GENERAL_NAME_free(names);
1786         }
1787
1788         /*
1789          *      If the CRL has expired, that might still be OK.
1790          */
1791         if (!my_ok &&
1792             (conf->allow_expired_crl) &&
1793             (err == X509_V_ERR_CRL_HAS_EXPIRED)) {
1794                 my_ok = 1;
1795                 X509_STORE_CTX_set_error( ctx, 0 );
1796         }
1797
1798         if (!my_ok) {
1799                 char const *p = X509_verify_cert_error_string(err);
1800                 RERROR("SSL says error %d : %s", err, p);
1801                 REXDENT();
1802                 return my_ok;
1803         }
1804
1805         if (lookup == 0) {
1806                 client_inf = client_cert->cert_info;
1807                 ext_list = client_inf->extensions;
1808         } else {
1809                 ext_list = NULL;
1810         }
1811
1812         /*
1813          *      Grab the X509 extensions, and create attributes out of them.
1814          *      For laziness, we re-use the OpenSSL names
1815          */
1816         if (sk_X509_EXTENSION_num(ext_list) > 0) {
1817                 int i, len;
1818                 char *p;
1819                 BIO *out;
1820
1821                 out = BIO_new(BIO_s_mem());
1822                 strlcpy(attribute, "TLS-Client-Cert-", sizeof(attribute));
1823
1824                 for (i = 0; i < sk_X509_EXTENSION_num(ext_list); i++) {
1825                         ASN1_OBJECT *obj;
1826                         X509_EXTENSION *ext;
1827
1828                         ext = sk_X509_EXTENSION_value(ext_list, i);
1829
1830                         obj = X509_EXTENSION_get_object(ext);
1831                         i2a_ASN1_OBJECT(out, obj);
1832                         len = BIO_read(out, attribute + 16 , sizeof(attribute) - 16 - 1);
1833                         if (len <= 0) continue;
1834
1835                         attribute[16 + len] = '\0';
1836
1837                         X509V3_EXT_print(out, ext, 0, 0);
1838                         len = BIO_read(out, value , sizeof(value) - 1);
1839                         if (len <= 0) continue;
1840
1841                         value[len] = '\0';
1842
1843                         /*
1844                          *      Mash the OpenSSL name to our name, and
1845                          *      create the attribute.
1846                          */
1847                         for (p = value + 16; *p != '\0'; p++) {
1848                                 if (*p == ' ') *p = '-';
1849                         }
1850
1851                         vp = pairmake(talloc_ctx, certs, attribute, value, T_OP_ADD);
1852                         rdebug_pair_list(L_DBG_LVL_2, request, vp, NULL);
1853                 }
1854
1855                 BIO_free_all(out);
1856         }
1857
1858         REXDENT();
1859
1860         switch (ctx->error) {
1861         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
1862                 RERROR("issuer=%s", issuer);
1863                 break;
1864
1865         case X509_V_ERR_CERT_NOT_YET_VALID:
1866         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
1867                 RERROR("notBefore=");
1868 #if 0
1869                 ASN1_TIME_print(bio_err, X509_get_notBefore(ctx->current_cert));
1870 #endif
1871                 break;
1872
1873         case X509_V_ERR_CERT_HAS_EXPIRED:
1874         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
1875                 RERROR("notAfter=");
1876 #if 0
1877                 ASN1_TIME_print(bio_err, X509_get_notAfter(ctx->current_cert));
1878 #endif
1879                 break;
1880         }
1881
1882         /*
1883          *      If we're at the actual client cert, apply additional
1884          *      checks.
1885          */
1886         if (depth == 0) {
1887                 /*
1888                  *      If the conf tells us to, check cert issuer
1889                  *      against the specified value and fail
1890                  *      verification if they don't match.
1891                  */
1892                 if (conf->check_cert_issuer &&
1893                     (strcmp(issuer, conf->check_cert_issuer) != 0)) {
1894                         AUTH("tls: Certificate issuer (%s) does not match specified value (%s)!", issuer, conf->check_cert_issuer);
1895                         my_ok = 0;
1896                 }
1897
1898                 /*
1899                  *      If the conf tells us to, check the CN in the
1900                  *      cert against xlat'ed value, but only if the
1901                  *      previous checks passed.
1902                  */
1903                 if (my_ok && conf->check_cert_cn) {
1904                         if (radius_xlat(cn_str, sizeof(cn_str), request, conf->check_cert_cn, NULL, NULL) < 0) {
1905                                 /* if this fails, fail the verification */
1906                                 my_ok = 0;
1907                         } else {
1908                                 RDEBUG2("checking certificate CN (%s) with xlat'ed value (%s)", common_name, cn_str);
1909                                 if (strcmp(cn_str, common_name) != 0) {
1910                                         AUTH("tls: Certificate CN (%s) does not match specified value (%s)!", common_name, cn_str);
1911                                         my_ok = 0;
1912                                 }
1913                         }
1914                 } /* check_cert_cn */
1915
1916 #ifdef HAVE_OPENSSL_OCSP_H
1917                 if (my_ok && conf->ocsp_enable){
1918                         RDEBUG2("--> Starting OCSP Request");
1919                         if (X509_STORE_CTX_get1_issuer(&issuer_cert, ctx, client_cert) != 1) {
1920                                 RERROR("Couldn't get issuer_cert for %s", common_name);
1921                         } else {
1922                                 my_ok = ocsp_check(ocsp_store, issuer_cert, client_cert, conf);
1923                         }
1924                 }
1925 #endif
1926
1927                 while (conf->verify_client_cert_cmd) {
1928                         char filename[256];
1929                         int fd;
1930                         FILE *fp;
1931
1932                         snprintf(filename, sizeof(filename), "%s/%s.client.XXXXXXXX",
1933                                  conf->verify_tmp_dir, progname);
1934                         fd = mkstemp(filename);
1935                         if (fd < 0) {
1936                                 RDEBUG("Failed creating file in %s: %s",
1937                                        conf->verify_tmp_dir, fr_syserror(errno));
1938                                 break;
1939                         }
1940
1941                         fp = fdopen(fd, "w");
1942                         if (!fp) {
1943                                 close(fd);
1944                                 RDEBUG("Failed opening file %s: %s",
1945                                        filename, fr_syserror(errno));
1946                                 break;
1947                         }
1948
1949                         if (!PEM_write_X509(fp, client_cert)) {
1950                                 fclose(fp);
1951                                 RDEBUG("Failed writing certificate to file");
1952                                 goto do_unlink;
1953                         }
1954                         fclose(fp);
1955
1956                         if (!pairmake_packet("TLS-Client-Cert-Filename",
1957                                              filename, T_OP_SET)) {
1958                                 RDEBUG("Failed creating TLS-Client-Cert-Filename");
1959
1960                                 goto do_unlink;
1961                         }
1962
1963                         RDEBUG("Verifying client certificate: %s", conf->verify_client_cert_cmd);
1964                         if (radius_exec_program(NULL, 0, NULL, request, conf->verify_client_cert_cmd,
1965                                                 request->packet->vps,
1966                                                 true, true, EXEC_TIMEOUT) != 0) {
1967                                 AUTH("tls: Certificate CN (%s) fails external verification!", common_name);
1968                                 my_ok = 0;
1969                         } else {
1970                                 RDEBUG("Client certificate CN %s passed external validation", common_name);
1971                         }
1972
1973                 do_unlink:
1974                         unlink(filename);
1975                         break;
1976                 }
1977
1978
1979         } /* depth == 0 */
1980
1981         if (debug_flag > 0) {
1982                 RDEBUG2("chain-depth=%d, ", depth);
1983                 RDEBUG2("error=%d", err);
1984
1985                 if (identity) RDEBUG2("--> User-Name = %s", *identity);
1986                 RDEBUG2("--> BUF-Name = %s", common_name);
1987                 RDEBUG2("--> subject = %s", subject);
1988                 RDEBUG2("--> issuer  = %s", issuer);
1989                 RDEBUG2("--> verify return:%d", my_ok);
1990         }
1991         return my_ok;
1992 }
1993
1994
1995 #ifdef HAVE_OPENSSL_OCSP_H
1996 /*
1997  *      Create Global X509 revocation store and use it to verify
1998  *      OCSP responses
1999  *
2000  *      - Load the trusted CAs
2001  *      - Load the trusted issuer certificates
2002  */
2003 static X509_STORE *init_revocation_store(fr_tls_server_conf_t *conf)
2004 {
2005         X509_STORE *store = NULL;
2006
2007         store = X509_STORE_new();
2008
2009         /* Load the CAs we trust */
2010         if (conf->ca_file || conf->ca_path)
2011                 if(!X509_STORE_load_locations(store, conf->ca_file, conf->ca_path)) {
2012                         ERROR("tls: X509_STORE error %s", ERR_error_string(ERR_get_error(), NULL));
2013                         ERROR("tls: Error reading Trusted root CA list %s",conf->ca_file );
2014                         return NULL;
2015                 }
2016
2017 #ifdef X509_V_FLAG_CRL_CHECK
2018         if (conf->check_crl)
2019                 X509_STORE_set_flags(store, X509_V_FLAG_CRL_CHECK);
2020 #endif
2021         return store;
2022 }
2023 #endif  /* HAVE_OPENSSL_OCSP_H */
2024
2025 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
2026 #ifndef OPENSSL_NO_ECDH
2027 static int set_ecdh_curve(SSL_CTX *ctx, char const *ecdh_curve)
2028 {
2029         int      nid;
2030         EC_KEY  *ecdh;
2031
2032         if (!ecdh_curve || !*ecdh_curve) return 0;
2033
2034         nid = OBJ_sn2nid(ecdh_curve);
2035         if (!nid) {
2036                 ERROR("Unknown ecdh_curve \"%s\"", ecdh_curve);
2037                 return -1;
2038         }
2039
2040         ecdh = EC_KEY_new_by_curve_name(nid);
2041         if (!ecdh) {
2042                 ERROR("Unable to create new curve \"%s\"", ecdh_curve);
2043                 return -1;
2044         }
2045
2046         SSL_CTX_set_tmp_ecdh(ctx, ecdh);
2047
2048         SSL_CTX_set_options(ctx, SSL_OP_SINGLE_ECDH_USE);
2049
2050         EC_KEY_free(ecdh);
2051
2052         return 0;
2053 }
2054 #endif
2055 #endif
2056
2057 /*
2058  * DIE OPENSSL DIE DIE DIE
2059  *
2060  * What a palaver, just to free some data attached the
2061  * session. We need to do this because the "remove" callback
2062  * is called when refcount > 0 sometimes, if another thread
2063  * is using the session
2064  */
2065 static void sess_free_vps(UNUSED void *parent, void *data_ptr,
2066                                 UNUSED CRYPTO_EX_DATA *ad, UNUSED int idx,
2067                                 UNUSED long argl, UNUSED void *argp)
2068 {
2069         VALUE_PAIR *vp = data_ptr;
2070         if (!vp) return;
2071
2072         DEBUG2("  Freeing cached session VPs");
2073
2074         pairfree(&vp);
2075 }
2076
2077 static void sess_free_certs(UNUSED void *parent, void *data_ptr,
2078                                 UNUSED CRYPTO_EX_DATA *ad, UNUSED int idx,
2079                                 UNUSED long argl, UNUSED void *argp)
2080 {
2081         VALUE_PAIR **certs = data_ptr;
2082         if (!certs) return;
2083
2084         DEBUG2("  Freeing cached session Certificates");
2085
2086         pairfree(certs);
2087 }
2088
2089 /** Add all the default ciphers and message digests reate our context.
2090  *
2091  * This should be called exactly once from main, before reading the main config
2092  * or initialising any modules.
2093  */
2094 void tls_global_init(void)
2095 {
2096         SSL_load_error_strings();       /* readable error messages (examples show call before library_init) */
2097         SSL_library_init();             /* initialize library */
2098         OpenSSL_add_all_algorithms();   /* required for SHA2 in OpenSSL < 0.9.8o and 1.0.0.a */
2099         OPENSSL_config(NULL);
2100
2101         /*
2102          *      Initialize the index for the certificates.
2103          */
2104         fr_tls_ex_index_certs = SSL_SESSION_get_ex_new_index(0, NULL, NULL, NULL, sess_free_certs);
2105 }
2106
2107 #ifdef ENABLE_OPENSSL_VERSION_CHECK
2108 /** Check for vulnerable versions of libssl
2109  *
2110  * @param acknowledged The highest CVE number a user has confirmed is not present in the system's libssl.
2111  * @return 0 if the CVE specified by the user matches the most recent CVE we have, else -1.
2112  */
2113 int tls_global_version_check(char const *acknowledged)
2114 {
2115         uint64_t v;
2116
2117         return 0;
2118         if ((strcmp(acknowledged, libssl_defects[0].id) != 0) && (strcmp(acknowledged, "yes") != 0)) {
2119                 bool bad = false;
2120                 size_t i;
2121
2122                 /* Check for bad versions */
2123                 v = (uint64_t) SSLeay();
2124
2125                 for (i = 0; i < (sizeof(libssl_defects) / sizeof(*libssl_defects)); i++) {
2126                         libssl_defect_t *defect = &libssl_defects[i];
2127
2128                         if ((v >= defect->low) && (v <= defect->high)) {
2129                                 ERROR("Refusing to start with libssl version %s (in range %s)",
2130                                       ssl_version(), ssl_version_range(defect->low, defect->high));
2131                                 ERROR("Security advisory %s (%s)", defect->id, defect->name);
2132                                 ERROR("%s", defect->comment);
2133
2134                                 bad = true;
2135                         }
2136                 }
2137
2138                 if (bad) {
2139                         INFO("Once you have verified libssl has been correctly patched, "
2140                              "set security.allow_vulnerable_openssl = '%s'", libssl_defects[0].id);
2141                         return -1;
2142                 }
2143         }
2144
2145         return 0;
2146 }
2147 #endif
2148
2149 /** Free any memory alloced by libssl
2150  *
2151  */
2152 void tls_global_cleanup(void)
2153 {
2154         ERR_remove_state(0);
2155         ENGINE_cleanup();
2156         CONF_modules_unload(1);
2157         ERR_free_strings();
2158         EVP_cleanup();
2159         CRYPTO_cleanup_all_ex_data();
2160 }
2161
2162 /*
2163  *      Create SSL context
2164  *
2165  *      - Load the trusted CAs
2166  *      - Load the Private key & the certificate
2167  *      - Set the Context options & Verify options
2168  */
2169 SSL_CTX *tls_init_ctx(fr_tls_server_conf_t *conf, int client)
2170 {
2171         SSL_CTX *ctx;
2172         X509_STORE *certstore;
2173         int verify_mode = SSL_VERIFY_NONE;
2174         int ctx_options = 0;
2175         int type;
2176
2177         /*
2178          *      SHA256 is in all versions of OpenSSL, but isn't
2179          *      initialized by default.  It's needed for WiMAX
2180          *      certificates.
2181          */
2182 #ifdef HAVE_OPENSSL_EVP_SHA256
2183         EVP_add_digest(EVP_sha256());
2184 #endif
2185
2186         ctx = SSL_CTX_new(SSLv23_method()); /* which is really "all known SSL / TLS methods".  Idiots. */
2187         if (!ctx) {
2188                 int err;
2189                 while ((err = ERR_get_error())) {
2190                         DEBUG("Failed creating SSL context: %s",
2191                               ERR_error_string(err, NULL));
2192                         return NULL;
2193                 }
2194         }
2195
2196         /*
2197          * Save the config on the context so that callbacks which
2198          * only get SSL_CTX* e.g. session persistence, can get it
2199          */
2200         SSL_CTX_set_app_data(ctx, conf);
2201
2202         /*
2203          * Identify the type of certificates that needs to be loaded
2204          */
2205         if (conf->file_type) {
2206                 type = SSL_FILETYPE_PEM;
2207         } else {
2208                 type = SSL_FILETYPE_ASN1;
2209         }
2210
2211         /*
2212          * Set the password to load private key
2213          */
2214         if (conf->private_key_password) {
2215 #ifdef __APPLE__
2216                 /*
2217                  * We don't want to put the private key password in eap.conf, so  check
2218                  * for our special string which indicates we should get the password
2219                  * programmatically.
2220                  */
2221                 char const* special_string = "Apple:UseCertAdmin";
2222                 if (strncmp(conf->private_key_password, special_string, strlen(special_string)) == 0) {
2223                         char cmd[256];
2224                         char *password;
2225                         long const max_password_len = 128;
2226                         snprintf(cmd, sizeof(cmd) - 1, "/usr/sbin/certadmin --get-private-key-passphrase \"%s\"",
2227                                  conf->private_key_file);
2228
2229                         DEBUG2("tls: Getting private key passphrase using command \"%s\"", cmd);
2230
2231                         FILE* cmd_pipe = popen(cmd, "r");
2232                         if (!cmd_pipe) {
2233                                 ERROR("TLS: %s command failed.  Unable to get private_key_password", cmd);
2234                                 ERROR("Error reading private_key_file %s", conf->private_key_file);
2235                                 return NULL;
2236                         }
2237
2238                         rad_const_free(conf->private_key_password);
2239                         password = talloc_array(conf, char, max_password_len);
2240                         if (!password) {
2241                                 ERROR("TLS: Can't allocate space for private_key_password");
2242                                 ERROR("TLS: Error reading private_key_file %s", conf->private_key_file);
2243                                 pclose(cmd_pipe);
2244                                 return NULL;
2245                         }
2246
2247                         fgets(password, max_password_len, cmd_pipe);
2248                         pclose(cmd_pipe);
2249
2250                         /* Get rid of newline at end of password. */
2251                         password[strlen(password) - 1] = '\0';
2252
2253                         DEBUG3("tls:  Password from command = \"%s\"", password);
2254                         conf->private_key_password = password;
2255                 }
2256 #endif
2257
2258                 {
2259                         char *password;
2260
2261                         memcpy(&password, &conf->private_key_password, sizeof(password));
2262                         SSL_CTX_set_default_passwd_cb_userdata(ctx, password);
2263                         SSL_CTX_set_default_passwd_cb(ctx, cbtls_password);
2264                 }
2265         }
2266
2267 #ifdef PSK_MAX_IDENTITY_LEN
2268         if (!client) {
2269                 /*
2270                  *      No dynamic query exists.  There MUST be a
2271                  *      statically configured identity and password.
2272                  */
2273                 if (conf->psk_query && !*conf->psk_query) {
2274                         ERROR("Invalid PSK Configuration: psk_query cannot be empty");
2275                         return NULL;
2276                 }
2277
2278                 /*
2279                  *      Set the callback only if we can check things.
2280                  */
2281                 if (conf->psk_identity || conf->psk_query) {
2282                         SSL_CTX_set_psk_server_callback(ctx, psk_server_callback);
2283                 }
2284
2285         } else if (conf->psk_query) {
2286                 ERROR("Invalid PSK Configuration: psk_query cannot be used for outgoing connections");
2287                 return NULL;
2288         }
2289
2290         /*
2291          *      Now check that if PSK is being used, the config is valid.
2292          */
2293         if ((conf->psk_identity && !conf->psk_password) ||
2294             (!conf->psk_identity && conf->psk_password) ||
2295             (conf->psk_identity && !*conf->psk_identity) ||
2296             (conf->psk_password && !*conf->psk_password)) {
2297                 ERROR("Invalid PSK Configuration: psk_identity or psk_password are empty");
2298                 return NULL;
2299         }
2300
2301         if (conf->psk_identity) {
2302                 size_t psk_len, hex_len;
2303                 uint8_t buffer[PSK_MAX_PSK_LEN];
2304
2305                 if (conf->certificate_file ||
2306                     conf->private_key_password || conf->private_key_file ||
2307                     conf->ca_file || conf->ca_path) {
2308                         ERROR("When PSKs are used, No certificate configuration is permitted");
2309                         return NULL;
2310                 }
2311
2312                 if (client) {
2313                         SSL_CTX_set_psk_client_callback(ctx,
2314                                                         psk_client_callback);
2315                 }
2316
2317                 psk_len = strlen(conf->psk_password);
2318                 if (strlen(conf->psk_password) > (2 * PSK_MAX_PSK_LEN)) {
2319                         ERROR("psk_hexphrase is too long (max %d)",
2320                                PSK_MAX_PSK_LEN);
2321                         return NULL;
2322                 }
2323
2324                 /*
2325                  *      Check the password now, so that we don't have
2326                  *      errors at run-time.
2327                  */
2328                 hex_len = fr_hex2bin(buffer, sizeof(buffer), conf->psk_password, psk_len);
2329                 if (psk_len != (2 * hex_len)) {
2330                         ERROR("psk_hexphrase is not all hex");
2331                         return NULL;
2332                 }
2333
2334                 goto post_ca;
2335         }
2336 #else
2337         (void) client;  /* -Wunused */
2338 #endif
2339
2340         /*
2341          *      Load our keys and certificates
2342          *
2343          *      If certificates are of type PEM then we can make use
2344          *      of cert chain authentication using openssl api call
2345          *      SSL_CTX_use_certificate_chain_file.  Please see how
2346          *      the cert chain needs to be given in PEM from
2347          *      openSSL.org
2348          */
2349         if (!conf->certificate_file) goto load_ca;
2350
2351         if (type == SSL_FILETYPE_PEM) {
2352                 if (!(SSL_CTX_use_certificate_chain_file(ctx, conf->certificate_file))) {
2353                         ERROR("Error reading certificate file %s:%s",
2354                                conf->certificate_file,
2355                                ERR_error_string(ERR_get_error(), NULL));
2356                         return NULL;
2357                 }
2358
2359         } else if (!(SSL_CTX_use_certificate_file(ctx, conf->certificate_file, type))) {
2360                 ERROR("Error reading certificate file %s:%s",
2361                        conf->certificate_file,
2362                        ERR_error_string(ERR_get_error(), NULL));
2363                 return NULL;
2364         }
2365
2366         /* Load the CAs we trust */
2367 load_ca:
2368         if (conf->ca_file || conf->ca_path) {
2369                 if (!SSL_CTX_load_verify_locations(ctx, conf->ca_file, conf->ca_path)) {
2370                         ERROR("tls: SSL error %s", ERR_error_string(ERR_get_error(), NULL));
2371                         ERROR("tls: Error reading Trusted root CA list %s",conf->ca_file );
2372                         return NULL;
2373                 }
2374         }
2375         if (conf->ca_file && *conf->ca_file) SSL_CTX_set_client_CA_list(ctx, SSL_load_client_CA_file(conf->ca_file));
2376
2377         if (conf->private_key_file) {
2378                 if (!(SSL_CTX_use_PrivateKey_file(ctx, conf->private_key_file, type))) {
2379                         ERROR("Failed reading private key file %s:%s",
2380                                conf->private_key_file,
2381                                ERR_error_string(ERR_get_error(), NULL));
2382                         return NULL;
2383                 }
2384
2385                 /*
2386                  * Check if the loaded private key is the right one
2387                  */
2388                 if (!SSL_CTX_check_private_key(ctx)) {
2389                         ERROR("Private key does not match the certificate public key");
2390                         return NULL;
2391                 }
2392         }
2393
2394 #ifdef PSK_MAX_IDENTITY_LEN
2395 post_ca:
2396 #endif
2397
2398         /*
2399          *      We never want SSLv2 or SSLv3.
2400          */
2401         ctx_options |= SSL_OP_NO_SSLv2;
2402         ctx_options |= SSL_OP_NO_SSLv3;
2403
2404         /*
2405          *      As of 3.0.5, we always allow TLSv1.1 and TLSv1.2.
2406          *      Though they can be *globally* disabled if necessary.x
2407          */
2408 #ifdef SSL_OP_NO_TLSv1_1
2409         if (conf->disable_tlsv1_1) ctx_options |= SSL_OP_NO_TLSv1_1;
2410 #endif
2411 #ifdef SSL_OP_NO_TLSv1_2
2412         if (conf->disable_tlsv1_2) ctx_options |= SSL_OP_NO_TLSv1_2;
2413 #endif
2414
2415 #ifdef SSL_OP_NO_TICKET
2416         ctx_options |= SSL_OP_NO_TICKET ;
2417 #endif
2418
2419         /*
2420          *      SSL_OP_SINGLE_DH_USE must be used in order to prevent
2421          *      small subgroup attacks and forward secrecy. Always
2422          *      using
2423          *
2424          *      SSL_OP_SINGLE_DH_USE has an impact on the computer
2425          *      time needed during negotiation, but it is not very
2426          *      large.
2427          */
2428         ctx_options |= SSL_OP_SINGLE_DH_USE;
2429
2430         /*
2431          *      SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS to work around issues
2432          *      in Windows Vista client.
2433          *      http://www.openssl.org/~bodo/tls-cbc.txt
2434          *      http://www.nabble.com/(RADIATOR)-Radiator-Version-3.16-released-t2600070.html
2435          */
2436         ctx_options |= SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS;
2437
2438         SSL_CTX_set_options(ctx, ctx_options);
2439
2440         /*
2441          *      TODO: Set the RSA & DH
2442          *      SSL_CTX_set_tmp_rsa_callback(ctx, cbtls_rsa);
2443          *      SSL_CTX_set_tmp_dh_callback(ctx, cbtls_dh);
2444          */
2445
2446         /*
2447          *      set the message callback to identify the type of
2448          *      message.  For every new session, there can be a
2449          *      different callback argument.
2450          *
2451          *      SSL_CTX_set_msg_callback(ctx, cbtls_msg);
2452          */
2453
2454         /*
2455          *      Set eliptical curve crypto configuration.
2456          */
2457 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
2458 #ifndef OPENSSL_NO_ECDH
2459         if (set_ecdh_curve(ctx, conf->ecdh_curve) < 0) {
2460                 return NULL;
2461         }
2462 #endif
2463 #endif
2464
2465         /* Set Info callback */
2466         SSL_CTX_set_info_callback(ctx, cbtls_info);
2467
2468         /*
2469          *      Callbacks, etc. for session resumption.
2470          */
2471         if (conf->session_cache_enable) {
2472                 SSL_CTX_sess_set_new_cb(ctx, cbtls_new_session);
2473                 SSL_CTX_sess_set_get_cb(ctx, cbtls_get_session);
2474                 SSL_CTX_sess_set_remove_cb(ctx, cbtls_remove_session);
2475
2476                 SSL_CTX_set_quiet_shutdown(ctx, 1);
2477                 if (fr_tls_ex_index_vps < 0)
2478                         fr_tls_ex_index_vps = SSL_SESSION_get_ex_new_index(0, NULL, NULL, NULL, sess_free_vps);
2479         }
2480
2481         /*
2482          *      Check the certificates for revocation.
2483          */
2484 #ifdef X509_V_FLAG_CRL_CHECK
2485         if (conf->check_crl) {
2486                 certstore = SSL_CTX_get_cert_store(ctx);
2487                 if (certstore == NULL) {
2488                         ERROR("tls: SSL error %s", ERR_error_string(ERR_get_error(), NULL));
2489                         ERROR("tls: Error reading Certificate Store");
2490                         return NULL;
2491                 }
2492                 X509_STORE_set_flags(certstore, X509_V_FLAG_CRL_CHECK);
2493         }
2494 #endif
2495
2496         /*
2497          *      Set verify modes
2498          *      Always verify the peer certificate
2499          */
2500         verify_mode |= SSL_VERIFY_PEER;
2501         verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
2502         verify_mode |= SSL_VERIFY_CLIENT_ONCE;
2503         SSL_CTX_set_verify(ctx, verify_mode, cbtls_verify);
2504
2505         if (conf->verify_depth) {
2506                 SSL_CTX_set_verify_depth(ctx, conf->verify_depth);
2507         }
2508
2509         /* Load randomness */
2510         if (conf->random_file) {
2511                 if (!(RAND_load_file(conf->random_file, 1024*10))) {
2512                         ERROR("tls: SSL error %s", ERR_error_string(ERR_get_error(), NULL));
2513                         ERROR("tls: Error loading randomness");
2514                         return NULL;
2515                 }
2516         }
2517
2518         /*
2519          * Set the cipher list if we were told to
2520          */
2521         if (conf->cipher_list) {
2522                 if (!SSL_CTX_set_cipher_list(ctx, conf->cipher_list)) {
2523                         ERROR("tls: Error setting cipher list");
2524                         return NULL;
2525                 }
2526         }
2527
2528         /*
2529          *      Setup session caching
2530          */
2531         if (conf->session_cache_enable) {
2532                 /*
2533                  *      Create a unique context Id per EAP-TLS configuration.
2534                  */
2535                 if (conf->session_id_name) {
2536                         snprintf(conf->session_context_id,
2537                                  sizeof(conf->session_context_id),
2538                                  "FR eap %s",
2539                                  conf->session_id_name);
2540                 } else {
2541                         snprintf(conf->session_context_id,
2542                                  sizeof(conf->session_context_id),
2543                                  "FR eap %p", conf);
2544                 }
2545
2546                 /*
2547                  *      Cache it, and DON'T auto-clear it.
2548                  */
2549                 SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_SERVER | SSL_SESS_CACHE_NO_AUTO_CLEAR);
2550
2551                 SSL_CTX_set_session_id_context(ctx,
2552                                                (unsigned char *) conf->session_context_id,
2553                                                (unsigned int) strlen(conf->session_context_id));
2554
2555                 /*
2556                  *      Our timeout is in hours, this is in seconds.
2557                  */
2558                 SSL_CTX_set_timeout(ctx, conf->session_timeout * 3600);
2559
2560                 /*
2561                  *      Set the maximum number of entries in the
2562                  *      session cache.
2563                  */
2564                 SSL_CTX_sess_set_cache_size(ctx, conf->session_cache_size);
2565
2566         } else {
2567                 SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_OFF);
2568         }
2569
2570         return ctx;
2571 }
2572
2573
2574 /*
2575  *      Free TLS client/server config
2576  *      Should not be called outside this code, as a callback is
2577  *      added to automatically free the data when the CONF_SECTION
2578  *      is freed.
2579  */
2580 static int _tls_server_conf_free(fr_tls_server_conf_t *conf)
2581 {
2582         if (conf->ctx) SSL_CTX_free(conf->ctx);
2583
2584 #ifdef HAVE_OPENSSL_OCSP_H
2585         if (conf->ocsp_store) X509_STORE_free(conf->ocsp_store);
2586         conf->ocsp_store = NULL;
2587 #endif
2588
2589 #ifndef NDEBUG
2590         memset(conf, 0, sizeof(*conf));
2591 #endif
2592         return 0;
2593 }
2594
2595 static fr_tls_server_conf_t *tls_server_conf_alloc(TALLOC_CTX *ctx)
2596 {
2597         fr_tls_server_conf_t *conf;
2598
2599         conf = talloc_zero(ctx, fr_tls_server_conf_t);
2600         if (!conf) {
2601                 ERROR("Out of memory");
2602                 return NULL;
2603         }
2604
2605         talloc_set_destructor(conf, _tls_server_conf_free);
2606
2607         return conf;
2608 }
2609
2610 fr_tls_server_conf_t *tls_server_conf_parse(CONF_SECTION *cs)
2611 {
2612         fr_tls_server_conf_t *conf;
2613
2614         /*
2615          *      If cs has already been parsed there should be a cached copy
2616          *      of conf already stored, so just return that.
2617          */
2618         conf = cf_data_find(cs, "tls-conf");
2619         if (conf) {
2620                 DEBUG("Using cached TLS configuration from previous invocation");
2621                 return conf;
2622         }
2623
2624         conf = tls_server_conf_alloc(cs);
2625
2626         if (cf_section_parse(cs, conf, tls_server_config) < 0) {
2627         error:
2628                 talloc_free(conf);
2629                 return NULL;
2630         }
2631
2632         /*
2633          *      Save people from their own stupidity.
2634          */
2635         if (conf->fragment_size < 100) conf->fragment_size = 100;
2636
2637         if (!conf->private_key_file) {
2638                 ERROR("TLS Server requires a private key file");
2639                 goto error;
2640         }
2641
2642         if (!conf->certificate_file) {
2643                 ERROR("TLS Server requires a certificate file");
2644                 goto error;
2645         }
2646
2647         /*
2648          *      Initialize TLS
2649          */
2650         conf->ctx = tls_init_ctx(conf, 0);
2651         if (conf->ctx == NULL) {
2652                 goto error;
2653         }
2654
2655 #ifdef HAVE_OPENSSL_OCSP_H
2656         /*
2657          *      Initialize OCSP Revocation Store
2658          */
2659         if (conf->ocsp_enable) {
2660                 conf->ocsp_store = init_revocation_store(conf);
2661                 if (conf->ocsp_store == NULL) goto error;
2662         }
2663 #endif /*HAVE_OPENSSL_OCSP_H*/
2664         {
2665                 char *dh_file;
2666
2667                 memcpy(&dh_file, &conf->dh_file, sizeof(dh_file));
2668                 if (load_dh_params(conf->ctx, dh_file) < 0) {
2669                         goto error;
2670                 }
2671         }
2672
2673         if (conf->verify_tmp_dir) {
2674                 if (chmod(conf->verify_tmp_dir, S_IRWXU) < 0) {
2675                         ERROR("Failed changing permissions on %s: %s", conf->verify_tmp_dir, fr_syserror(errno));
2676                         goto error;
2677                 }
2678         }
2679
2680         if (conf->verify_client_cert_cmd && !conf->verify_tmp_dir) {
2681                 ERROR("You MUST set the verify directory in order to use verify_client_cmd");
2682                 goto error;
2683         }
2684
2685         /*
2686          *      Cache conf in cs in case we're asked to parse this again.
2687          */
2688         cf_data_add(cs, "tls-conf", conf, NULL);
2689
2690         return conf;
2691 }
2692
2693 fr_tls_server_conf_t *tls_client_conf_parse(CONF_SECTION *cs)
2694 {
2695         fr_tls_server_conf_t *conf;
2696
2697         conf = cf_data_find(cs, "tls-conf");
2698         if (conf) {
2699                 DEBUG("Using cached TLS configuration from previous invocation");
2700                 return conf;
2701         }
2702
2703         conf = tls_server_conf_alloc(cs);
2704
2705         if (cf_section_parse(cs, conf, tls_client_config) < 0) {
2706         error:
2707                 talloc_free(conf);
2708                 return NULL;
2709         }
2710
2711         /*
2712          *      Save people from their own stupidity.
2713          */
2714         if (conf->fragment_size < 100) conf->fragment_size = 100;
2715
2716         /*
2717          *      Initialize TLS
2718          */
2719         conf->ctx = tls_init_ctx(conf, 1);
2720         if (conf->ctx == NULL) {
2721                 goto error;
2722         }
2723
2724         {
2725                 char *dh_file;
2726
2727                 memcpy(&dh_file, &conf->dh_file, sizeof(dh_file));
2728                 if (load_dh_params(conf->ctx, dh_file) < 0) {
2729                         goto error;
2730                 }
2731         }
2732
2733         cf_data_add(cs, "tls-conf", conf, NULL);
2734
2735         return conf;
2736 }
2737
2738 int tls_success(tls_session_t *ssn, REQUEST *request)
2739 {
2740         VALUE_PAIR *vp, *vps = NULL;
2741         fr_tls_server_conf_t *conf;
2742         TALLOC_CTX *talloc_ctx;
2743
2744         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssn->ssl, FR_TLS_EX_INDEX_CONF);
2745         rad_assert(conf != NULL);
2746
2747         talloc_ctx = SSL_get_ex_data(ssn->ssl, FR_TLS_EX_INDEX_TALLOC);
2748
2749         /*
2750          *      If there's no session resumption, delete the entry
2751          *      from the cache.  This means either it's disabled
2752          *      globally for this SSL context, OR we were told to
2753          *      disable it for this user.
2754          *
2755          *      This also means you can't turn it on just for one
2756          *      user.
2757          */
2758         if ((!ssn->allow_session_resumption) ||
2759             (((vp = pairfind(request->config_items, PW_ALLOW_SESSION_RESUMPTION, 0, TAG_ANY)) != NULL) &&
2760              (vp->vp_integer == 0))) {
2761                 SSL_CTX_remove_session(ssn->ctx,
2762                                        ssn->ssl->session);
2763                 ssn->allow_session_resumption = false;
2764
2765                 /*
2766                  *      If we're in a resumed session and it's
2767                  *      not allowed,
2768                  */
2769                 if (SSL_session_reused(ssn->ssl)) {
2770                         RDEBUG("FAIL: Forcibly stopping session resumption as it is not allowed");
2771                         return -1;
2772                 }
2773         /*
2774          *      Else resumption IS allowed, so we store the
2775          *      user data in the cache.
2776          */
2777         } else if (!SSL_session_reused(ssn->ssl)) {
2778                 size_t size;
2779                 VALUE_PAIR **certs;
2780                 char buffer[2 * MAX_SESSION_SIZE + 1];
2781
2782                 size = ssn->ssl->session->session_id_length;
2783                 if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
2784
2785                 fr_bin2hex(buffer, ssn->ssl->session->session_id, size);
2786
2787                 vp = paircopy_by_num(talloc_ctx, request->reply->vps, PW_USER_NAME, 0, TAG_ANY);
2788                 if (vp) pairadd(&vps, vp);
2789
2790                 vp = paircopy_by_num(talloc_ctx, request->packet->vps, PW_STRIPPED_USER_NAME, 0, TAG_ANY);
2791                 if (vp) pairadd(&vps, vp);
2792
2793                 vp = paircopy_by_num(talloc_ctx, request->packet->vps, PW_STRIPPED_USER_DOMAIN, 0, TAG_ANY);
2794                 if (vp) pairadd(&vps, vp);
2795
2796                 vp = paircopy_by_num(talloc_ctx, request->reply->vps, PW_CHARGEABLE_USER_IDENTITY, 0, TAG_ANY);
2797                 if (vp) pairadd(&vps, vp);
2798
2799                 vp = paircopy_by_num(talloc_ctx, request->reply->vps, PW_CACHED_SESSION_POLICY, 0, TAG_ANY);
2800                 if (vp) pairadd(&vps, vp);
2801
2802                 certs = (VALUE_PAIR **)SSL_get_ex_data(ssn->ssl, fr_tls_ex_index_certs);
2803
2804                 /*
2805                  *      Hmm... the certs should probably be session data.
2806                  */
2807                 if (certs) {
2808                         /*
2809                          *      @todo: some go into reply, others into
2810                          *      request
2811                          */
2812                         pairadd(&vps, paircopy(talloc_ctx, *certs));
2813                 }
2814
2815                 if (vps) {
2816                         RDEBUG2("Saving session %s vps %p in the cache", buffer, vps);
2817                         SSL_SESSION_set_ex_data(ssn->ssl->session, fr_tls_ex_index_vps, vps);
2818                         if (conf->session_cache_path) {
2819                                 /* write the VPs to the cache file */
2820                                 char filename[256], buf[1024];
2821                                 FILE *vp_file;
2822
2823                                 snprintf(filename, sizeof(filename), "%s%c%s.vps", conf->session_cache_path,
2824                                          FR_DIR_SEP, buffer);
2825                                 vp_file = fopen(filename, "w");
2826                                 if (vp_file == NULL) {
2827                                         RDEBUG2("Could not write session VPs to persistent cache: %s",
2828                                                 fr_syserror(errno));
2829                                 } else {
2830                                         vp_cursor_t cursor;
2831                                         /* generate a dummy user-style entry which is easy to read back */
2832                                         fprintf(vp_file, "# SSL cached session\n");
2833                                         fprintf(vp_file, "%s\n", buffer);
2834                                         for (vp = fr_cursor_init(&cursor, &vps);
2835                                              vp;
2836                                              vp = fr_cursor_next(&cursor)) {
2837                                                 vp_prints(buf, sizeof(buf), vp);
2838                                                 fprintf(vp_file, "\t%s,\n", buf);
2839                                         }
2840                                         fclose(vp_file);
2841                                 }
2842                         }
2843                 } else {
2844                         RDEBUG2("No information to cache: session caching will be disabled for session %s", buffer);
2845                         SSL_CTX_remove_session(ssn->ctx, ssn->ssl->session);
2846                 }
2847
2848         /*
2849          *      Else the session WAS allowed.  Copy the cached reply.
2850          */
2851         } else {
2852                 size_t size;
2853                 char buffer[2 * MAX_SESSION_SIZE + 1];
2854
2855                 size = ssn->ssl->session->session_id_length;
2856                 if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
2857
2858                 fr_bin2hex(buffer, ssn->ssl->session->session_id, size);
2859
2860                 vps = SSL_SESSION_get_ex_data(ssn->ssl->session, fr_tls_ex_index_vps);
2861                 if (!vps) {
2862                         RWDEBUG("No information in cached session %s", buffer);
2863                         return -1;
2864                 } else {
2865                         vp_cursor_t cursor;
2866
2867                         RDEBUG("Adding cached attributes for session %s:", buffer);
2868                         rdebug_pair_list(L_DBG_LVL_1, request, vps, NULL);
2869                         for (vp = fr_cursor_init(&cursor, &vps);
2870                              vp;
2871                              vp = fr_cursor_next(&cursor)) {
2872                                 /*
2873                                  *      TLS-* attrs get added back to
2874                                  *      the request list.
2875                                  */
2876                                 if ((vp->da->vendor == 0) &&
2877                                     (vp->da->attr >= PW_TLS_CERT_SERIAL) &&
2878                                     (vp->da->attr <= PW_TLS_CLIENT_CERT_SUBJECT_ALT_NAME_UPN)) {
2879                                         pairadd(&request->packet->vps, paircopyvp(request->packet, vp));
2880                                 } else {
2881                                         pairadd(&request->reply->vps, paircopyvp(request->reply, vp));
2882                                 }
2883                         }
2884
2885                         if (conf->session_cache_path) {
2886                                 /* "touch" the cached session/vp file */
2887                                 char filename[256];
2888
2889                                 snprintf(filename, sizeof(filename), "%s%c%s.asn1",
2890                                         conf->session_cache_path, FR_DIR_SEP, buffer);
2891                                 utime(filename, NULL);
2892                                 snprintf(filename, sizeof(filename), "%s%c%s.vps",
2893                                         conf->session_cache_path, FR_DIR_SEP, buffer);
2894                                 utime(filename, NULL);
2895                         }
2896
2897                         /*
2898                          *      Mark the request as resumed.
2899                          */
2900                         pairmake_packet("EAP-Session-Resumed", "1", T_OP_SET);
2901                 }
2902         }
2903
2904         return 0;
2905 }
2906
2907
2908 void tls_fail(tls_session_t *ssn)
2909 {
2910         /*
2911          *      Force the session to NOT be cached.
2912          */
2913         SSL_CTX_remove_session(ssn->ctx, ssn->ssl->session);
2914 }
2915
2916 fr_tls_status_t tls_application_data(tls_session_t *ssn,
2917                                      REQUEST *request)
2918
2919 {
2920         int err;
2921
2922         /*
2923          *      Decrypt the complete record.
2924          */
2925         err = BIO_write(ssn->into_ssl, ssn->dirty_in.data,
2926                         ssn->dirty_in.used);
2927         if (err != (int) ssn->dirty_in.used) {
2928                 record_init(&ssn->dirty_in);
2929                 RDEBUG("Failed writing %d to SSL BIO: %d", ssn->dirty_in.used, err);
2930                 return FR_TLS_FAIL;
2931         }
2932
2933         /*
2934          *      Clear the dirty buffer now that we are done with it
2935          *      and init the clean_out buffer to store decrypted data
2936          */
2937         record_init(&ssn->dirty_in);
2938         record_init(&ssn->clean_out);
2939
2940         /*
2941          *      Read (and decrypt) the tunneled data from the
2942          *      SSL session, and put it into the decrypted
2943          *      data buffer.
2944          */
2945         err = SSL_read(ssn->ssl, ssn->clean_out.data, sizeof(ssn->clean_out.data));
2946         if (err < 0) {
2947                 int code;
2948
2949                 RDEBUG("SSL_read Error");
2950
2951                 code = SSL_get_error(ssn->ssl, err);
2952                 switch (code) {
2953                 case SSL_ERROR_WANT_READ:
2954                         DEBUG("Error in fragmentation logic: SSL_WANT_READ");
2955                         return FR_TLS_MORE_FRAGMENTS;
2956
2957                 case SSL_ERROR_WANT_WRITE:
2958                         DEBUG("Error in fragmentation logic: SSL_WANT_WRITE");
2959                         break;
2960
2961                 default:
2962                         DEBUG("Error in fragmentation logic: %s", ERR_error_string(code, NULL));
2963
2964                         /*
2965                          *      FIXME: Call int_ssl_check?
2966                          */
2967                         break;
2968                 }
2969                 return FR_TLS_FAIL;
2970         }
2971
2972         if (err == 0) RWDEBUG("No data inside of the tunnel");
2973
2974         /*
2975          *      Passed all checks, successfully decrypted data
2976          */
2977         ssn->clean_out.used = err;
2978
2979         return FR_TLS_OK;
2980 }
2981
2982
2983 /*
2984  * Acknowledge received is for one of the following messages sent earlier
2985  * 1. Handshake completed Message, so now send, EAP-Success
2986  * 2. Alert Message, now send, EAP-Failure
2987  * 3. Fragment Message, now send, next Fragment
2988  */
2989 fr_tls_status_t tls_ack_handler(tls_session_t *ssn, REQUEST *request)
2990 {
2991         RDEBUG2("Received TLS ACK");
2992
2993         if (ssn == NULL){
2994                 RERROR("FAIL: Unexpected ACK received.  Could not obtain session information");
2995                 return FR_TLS_INVALID;
2996         }
2997         if (ssn->info.initialized == 0) {
2998                 RDEBUG("No SSL info available. Waiting for more SSL data");
2999                 return FR_TLS_REQUEST;
3000         }
3001         if ((ssn->info.content_type == handshake) && (ssn->info.origin == 0)) {
3002                 RERROR("FAIL: ACK without earlier message");
3003                 return FR_TLS_INVALID;
3004         }
3005
3006         switch (ssn->info.content_type) {
3007         case alert:
3008                 RDEBUG2("ACK alert");
3009                 return FR_TLS_FAIL;
3010
3011         case handshake:
3012                 if ((ssn->info.handshake_type == handshake_finished) && (ssn->dirty_out.used == 0)) {
3013                         RDEBUG2("ACK handshake is finished");
3014
3015                         /*
3016                          *      From now on all the content is
3017                          *      application data set it here as nobody else
3018                          *      sets it.
3019                          */
3020                         ssn->info.content_type = application_data;
3021                         return FR_TLS_SUCCESS;
3022                 } /* else more data to send */
3023
3024                 RDEBUG2("ACK handshake fragment handler");
3025                 /* Fragmentation handler, send next fragment */
3026                 return FR_TLS_REQUEST;
3027
3028         case application_data:
3029                 RDEBUG2("ACK handshake fragment handler in application data");
3030                 return FR_TLS_REQUEST;
3031
3032                 /*
3033                  *      For the rest of the conditions, switch over
3034                  *      to the default section below.
3035                  */
3036         default:
3037                 RERROR("Invalid ACK received: %d", ssn->info.content_type);
3038
3039                 return FR_TLS_INVALID;
3040         }
3041 }
3042
3043 #endif  /* WITH_TLS */
3044