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 HAVE_OPENSSL_EVP_H
  55 #    include <openssl/evp.h>
  56 #  endif
  57 #  include <openssl/ssl.h>
  58
  59 #define LOG_PREFIX "tls"
  60
  61 #ifdef ENABLE_OPENSSL_VERSION_CHECK
  62 typedef struct libssl_defect {
  63         uint64_t        high;
  64         uint64_t        low;
  65
  66         char const      *id;
  67         char const      *name;
  68         char const      *comment;
  69 } libssl_defect_t;
  70
  71 /* Record critical defects in libssl here, new versions of OpenSSL to older versions of OpenSSL.  */
  72 static libssl_defect_t libssl_defects[] =
  73 {
  74         {
  75                 .low            = 0x01010101f,          /* 1.1.0a */
  76                 .high           = 0x01010101f,          /* 1.1.0a */
  77                 .id             = "CVE-2016-6309",
  78                 .name           = "OCSP status request extension",
  79                 .comment        = "For more information see https://www.openssl.org/news/secadv/20160926.txt"
  80         },
  81         {
  82                 .low            = 0x01010100f,          /* 1.1.0  */
  83                 .high           = 0x01010100f,          /* 1.1.0  */
  84                 .id             = "CVE-2016-6304",
  85                 .name           = "OCSP status request extension",
  86                 .comment        = "For more information see https://www.openssl.org/news/secadv/20160922.txt"
  87         },
  88         {
  89                 .low            = 0x01000209f,          /* 1.0.2i */
  90                 .high           = 0x01000209f,          /* 1.0.2i */
  91                 .id             = "CVE-2016-7052",
  92                 .name           = "OCSP status request extension",
  93                 .comment        = "For more information see https://www.openssl.org/news/secadv/20160926.txt"
  94         },
  95         {
  96                 .low            = 0x01000200f,          /* 1.0.2  */
  97                 .high           = 0x01000208f,          /* 1.0.2h */
  98                 .id             = "CVE-2016-6304",
  99                 .name           = "OCSP status request extension",
 100                 .comment        = "For more information see https://www.openssl.org/news/secadv/20160922.txt"
 101         },
 102         {
 103                 .low            = 0x01000100f,          /* 1.0.1  */
 104                 .high           = 0x01000114f,          /* 1.0.1t */
 105                 .id             = "CVE-2016-6304",
 106                 .name           = "OCSP status request extension",
 107                 .comment        = "For more information see https://www.openssl.org/news/secadv/20160922.txt"
 108         },
 109         {
 110                 .low            = 0x010001000,          /* 1.0.1  */
 111                 .high           = 0x01000106f,          /* 1.0.1f */
 112                 .id             = "CVE-2014-0160",
 113                 .name           = "Heartbleed",
 114                 .comment        = "For more information see http://heartbleed.com"
 115         },
 116 };
 117 #endif /* ENABLE_OPENSSL_VERSION_CHECK */
 118
 119 FR_NAME_NUMBER const fr_tls_status_table[] = {
 120         { "invalid",                    FR_TLS_INVALID },
 121         { "request",                    FR_TLS_REQUEST },
 122         { "response",                   FR_TLS_RESPONSE },
 123         { "success",                    FR_TLS_SUCCESS },
 124         { "fail",                       FR_TLS_FAIL },
 125         { "noop",                       FR_TLS_NOOP },
 126
 127         { "start",                      FR_TLS_START },
 128         { "ok",                         FR_TLS_OK },
 129         { "ack",                        FR_TLS_ACK },
 130         { "first fragment",             FR_TLS_FIRST_FRAGMENT },
 131         { "more fragments",             FR_TLS_MORE_FRAGMENTS },
 132         { "length included",            FR_TLS_LENGTH_INCLUDED },
 133         { "more fragments with length", FR_TLS_MORE_FRAGMENTS_WITH_LENGTH },
 134         { "handled",                    FR_TLS_HANDLED },
 135         {  NULL ,                       -1},
 136 };
 137
 138 /* index we use to store cached session VPs
 139  * needs to be dynamic so we can supply a "free" function
 140  */
 141 int fr_tls_ex_index_vps = -1;
 142 int fr_tls_ex_index_certs = -1;
 143
 144 /* Session */
 145 static void             session_close(tls_session_t *ssn);
 146 static void             session_init(tls_session_t *ssn);
 147
 148 /* record */
 149 static void             record_init(record_t *buf);
 150 static void             record_close(record_t *buf);
 151 static unsigned int     record_plus(record_t *buf, void const *ptr,
 152                                     unsigned int size);
 153 static unsigned int     record_minus(record_t *buf, void *ptr,
 154                                      unsigned int size);
 155
 156 DIAG_OFF(format-nonliteral)
 157 /** Print errors in the TLS thread local error stack
 158  *
 159  * Drains the thread local OpenSSL error queue, and prints out errors.
 160  *
 161  * @param[in] request   The current request (may be NULL).
 162  * @param[in] msg       Error message describing the operation being attempted.
 163  * @param[in] ap        Arguments for msg.
 164  * @return the number of errors drained from the stack.
 165  */
 166 static int tls_verror_log(REQUEST *request, char const *msg, va_list ap)
 167 {
 168         unsigned long   error;
 169         char            *p;
 170         int             in_stack = 0;
 171         char            buffer[256];
 172
 173         int             line;
 174         char const      *file;
 175
 176         /*
 177          *      Pop the first error, so ERR_peek_error()
 178          *      can be used to determine if there are
 179          *      multiple errors.
 180          */
 181         error = ERR_get_error_line(&file, &line);
 182
 183         if (msg) {
 184                 p = talloc_vasprintf(request, msg, ap);
 185
 186                 /*
 187                  *      Single line mode (there's only one error)
 188                  */
 189                 if (error && !ERR_peek_error()) {
 190                         ERR_error_string_n(error, buffer, sizeof(buffer));
 191
 192                         /* Extra verbose */
 193                         if ((request && RDEBUG_ENABLED3) || DEBUG_ENABLED3) {
 194                                 ROPTIONAL(REDEBUG, ERROR, "%s: %s[%i]:%s", p, file, line, buffer);
 195                         } else {
 196                                 ROPTIONAL(REDEBUG, ERROR, "%s: %s", p, buffer);
 197                         }
 198
 199                         talloc_free(p);
 200
 201                         return 1;
 202                 }
 203
 204                 /*
 205                  *      Print the error we were given, irrespective
 206                  *      of whether there were any OpenSSL errors.
 207                  */
 208                 ROPTIONAL(RERROR, ERROR, "%s", p);
 209                 talloc_free(p);
 210         }
 211
 212         /*
 213          *      Stack mode (there are multiple errors)
 214          */
 215         if (!error) return 0;
 216         do {
 217                 ERR_error_string_n(error, buffer, sizeof(buffer));
 218                 /* Extra verbose */
 219                 if ((request && RDEBUG_ENABLED3) || DEBUG_ENABLED3) {
 220                         ROPTIONAL(REDEBUG, ERROR, "%s[%i]:%s", file, line, buffer);
 221                 } else {
 222                         ROPTIONAL(REDEBUG, ERROR, "%s", buffer);
 223                 }
 224                 in_stack++;
 225         } while ((error = ERR_get_error_line(&file, &line)));
 226
 227         return in_stack;
 228 }
 229 DIAG_ON(format-nonliteral)
 230
 231 /** Print errors in the TLS thread local error stack
 232  *
 233  * Drains the thread local OpenSSL error queue, and prints out errors.
 234  *
 235  * @param[in] request   The current request (may be NULL).
 236  * @param[in] msg       Error message describing the operation being attempted.
 237  * @param[in] ...       Arguments for msg.
 238  * @return the number of errors drained from the stack.
 239  */
 240 int tls_error_log(REQUEST *request, char const *msg, ...)
 241 {
 242         va_list ap;
 243         int ret;
 244
 245         va_start(ap, msg);
 246         ret = tls_verror_log(request, msg, ap);
 247         va_end(ap);
 248
 249         return ret;
 250 }
 251
 252 /** Print errors raised by OpenSSL I/O functions
 253  *
 254  * Drains the thread local OpenSSL error queue, and prints out errors
 255  * based on the SSL handle and the return code of the I/O  function.
 256  *
 257  * OpenSSL lists I/O functions to be:
 258  *   - SSL_connect
 259  *   - SSL_accept
 260  *   - SSL_do_handshake
 261  *   - SSL_read
 262  *   - SSL_peek
 263  *   - SSL_write
 264  *
 265  * @param request       The current request (may be NULL).
 266  * @param session       The current tls_session.
 267  * @param ret           from the I/O operation.
 268  * @param msg           Error message describing the operation being attempted.
 269  * @param ...           Arguments for msg.
 270  * @return
 271  *      - 0 TLS session cannot continue.
 272  *      - 1 TLS session may still be viable.
 273  */
 274 int tls_error_io_log(REQUEST *request, tls_session_t *session, int ret, char const *msg, ...)
 275 {
 276         int     error;
 277         va_list ap;
 278
 279         if (ERR_peek_error()) {
 280                 va_start(ap, msg);
 281                 tls_verror_log(request, msg, ap);
 282                 va_end(ap);
 283         }
 284
 285         error = SSL_get_error(session->ssl, ret);
 286         switch (error) {
 287         /*
 288          *      These seem to be harmless and already "dealt
 289          *      with" by our non-blocking environment. NB:
 290          *      "ZERO_RETURN" is the clean "error"
 291          *      indicating a successfully closed SSL
 292          *      tunnel. We let this happen because our IO
 293          *      loop should not appear to have broken on
 294          *      this condition - and outside the IO loop, the
 295          *      "shutdown" state is checked.
 296          *
 297          *      Don't print anything if we ignore the error.
 298          */
 299         case SSL_ERROR_NONE:
 300         case SSL_ERROR_WANT_READ:
 301         case SSL_ERROR_WANT_WRITE:
 302         case SSL_ERROR_WANT_X509_LOOKUP:
 303         case SSL_ERROR_ZERO_RETURN:
 304                 break;
 305
 306         /*
 307          *      These seem to be indications of a genuine
 308          *      error that should result in the SSL tunnel
 309          *      being regarded as "dead".
 310          */
 311         case SSL_ERROR_SYSCALL:
 312                 ROPTIONAL(REDEBUG, ERROR, "System call (I/O) error (%i)", ret);
 313                 return 0;
 314
 315         case SSL_ERROR_SSL:
 316                 ROPTIONAL(REDEBUG, ERROR, "TLS protocol error (%i)", ret);
 317                 return 0;
 318
 319         /*
 320          *      For any other errors that (a) exist, and (b)
 321          *      crop up - we need to interpret what to do with
 322          *      them - so "politely inform" the caller that
 323          *      the code needs updating here.
 324          */
 325         default:
 326                 ROPTIONAL(REDEBUG, ERROR, "TLS session error %i (%i)", error, ret);
 327                 return 0;
 328         }
 329
 330         return 1;
 331 }
 332
 333 #ifdef PSK_MAX_IDENTITY_LEN
 334 static bool identity_is_safe(const char *identity)
 335 {
 336         char c;
 337
 338         if (!identity) return true;
 339
 340         while ((c = *(identity++)) != '\0') {
 341                 if (isalpha((int) c) || isdigit((int) c) || isspace((int) c) ||
 342                     (c == '@') || (c == '-') || (c == '_') || (c == '.')) {
 343                         continue;
 344                 }
 345
 346                 return false;
 347         }
 348
 349         return true;
 350 }
 351
 352 /*
 353  *      When a client uses TLS-PSK to talk to a server, this callback
 354  *      is used by the server to determine the PSK to use.
 355  */
 356 static unsigned int psk_server_callback(SSL *ssl, const char *identity,
 357                                         unsigned char *psk,
 358                                         unsigned int max_psk_len)
 359 {
 360         unsigned int psk_len = 0;
 361         fr_tls_server_conf_t *conf;
 362         REQUEST *request;
 363
 364         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl,
 365                                                        FR_TLS_EX_INDEX_CONF);
 366         if (!conf) return 0;
 367
 368         request = (REQUEST *)SSL_get_ex_data(ssl,
 369                                              FR_TLS_EX_INDEX_REQUEST);
 370         if (request && conf->psk_query) {
 371                 size_t hex_len;
 372                 VALUE_PAIR *vp;
 373                 char buffer[2 * PSK_MAX_PSK_LEN + 4]; /* allow for too-long keys */
 374
 375                 /*
 376                  *      The passed identity is weird.  Deny it.
 377                  */
 378                 if (!identity_is_safe(identity)) {
 379                         RWDEBUG("Invalid characters in PSK identity %s", identity);
 380                         return 0;
 381                 }
 382
 383                 vp = pair_make_request("TLS-PSK-Identity", identity, T_OP_SET);
 384                 if (!vp) return 0;
 385
 386                 hex_len = radius_xlat(buffer, sizeof(buffer), request, conf->psk_query,
 387                                       NULL, NULL);
 388                 if (!hex_len) {
 389                         RWDEBUG("PSK expansion returned an empty string.");
 390                         return 0;
 391                 }
 392
 393                 /*
 394                  *      The returned key is truncated at MORE than
 395                  *      OpenSSL can handle.  That way we can detect
 396                  *      the truncation, and complain about it.
 397                  */
 398                 if (hex_len > (2 * max_psk_len)) {
 399                         RWDEBUG("Returned PSK is too long (%u > %u)",
 400                                 (unsigned int) hex_len, 2 * max_psk_len);
 401                         return 0;
 402                 }
 403
 404                 /*
 405                  *      Leave the TLS-PSK-Identity in the request, and
 406                  *      convert the expansion from printable string
 407                  *      back to hex.
 408                  */
 409                 return fr_hex2bin(psk, max_psk_len, buffer, hex_len);
 410         }
 411
 412         if (!conf->psk_identity) {
 413                 DEBUG("No static PSK identity set.  Rejecting the user");
 414                 return 0;
 415         }
 416
 417         /*
 418          *      No REQUEST, or no dynamic query.  Just look for a
 419          *      static identity.
 420          */
 421         if (strcmp(identity, conf->psk_identity) != 0) {
 422                 ERROR("Supplied PSK identity %s does not match configuration.  Rejecting.",
 423                       identity);
 424                 return 0;
 425         }
 426
 427         psk_len = strlen(conf->psk_password);
 428         if (psk_len > (2 * max_psk_len)) return 0;
 429
 430         return fr_hex2bin(psk, max_psk_len, conf->psk_password, psk_len);
 431 }
 432
 433 static unsigned int psk_client_callback(SSL *ssl, UNUSED char const *hint,
 434                                         char *identity, unsigned int max_identity_len,
 435                                         unsigned char *psk, unsigned int max_psk_len)
 436 {
 437         unsigned int psk_len;
 438         fr_tls_server_conf_t *conf;
 439
 440         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl,
 441                                                        FR_TLS_EX_INDEX_CONF);
 442         if (!conf) return 0;
 443
 444         psk_len = strlen(conf->psk_password);
 445         if (psk_len > (2 * max_psk_len)) return 0;
 446
 447         strlcpy(identity, conf->psk_identity, max_identity_len);
 448
 449         return fr_hex2bin(psk, max_psk_len, conf->psk_password, psk_len);
 450 }
 451
 452 #endif
 453
 454 #define MAX_SESSION_SIZE (256)
 455
 456
 457 void tls_session_id(SSL_SESSION *ssn, char *buffer, size_t bufsize)
 458 {
 459 #if OPENSSL_VERSION_NUMBER < 0x10001000L
 460         size_t size;
 461
 462         size = ssn->session_id_length;
 463         if (size > bufsize) size = bufsize;
 464
 465         fr_bin2hex(buffer, ssn->session_id, size);
 466 #else
 467         unsigned int size;
 468         uint8_t const *p;
 469
 470         p = SSL_SESSION_get_id(ssn, &size);
 471         if (size > bufsize) size = bufsize;
 472
 473         fr_bin2hex(buffer, p, size);
 474
 475 #endif
 476 }
 477
 478
 479
 480 static int _tls_session_free(tls_session_t *ssn)
 481 {
 482         /*
 483          *      Free any opaque TTLS or PEAP data.
 484          */
 485         if ((ssn->opaque) && (ssn->free_opaque)) {
 486                 ssn->free_opaque(ssn->opaque);
 487                 ssn->opaque = NULL;
 488         }
 489
 490         session_close(ssn);
 491
 492         return 0;
 493 }
 494
 495 tls_session_t *tls_new_client_session(TALLOC_CTX *ctx, fr_tls_server_conf_t *conf, int fd)
 496 {
 497         int ret;
 498         int verify_mode;
 499         tls_session_t *ssn = NULL;
 500         REQUEST *request;
 501
 502         ssn = talloc_zero(ctx, tls_session_t);
 503         if (!ssn) return NULL;
 504
 505         talloc_set_destructor(ssn, _tls_session_free);
 506
 507         ssn->ctx = conf->ctx;
 508         ssn->mtu = conf->fragment_size;
 509
 510         SSL_CTX_set_mode(ssn->ctx, SSL_MODE_ACCEPT_MOVING_WRITE_BUFFER | SSL_MODE_AUTO_RETRY);
 511
 512         ssn->ssl = SSL_new(ssn->ctx);
 513         if (!ssn->ssl) {
 514                 talloc_free(ssn);
 515                 return NULL;
 516         }
 517
 518         request = request_alloc(ssn);
 519         SSL_set_ex_data(ssn->ssl, FR_TLS_EX_INDEX_REQUEST, (void *)request);
 520
 521         /*
 522          *      Add the message callback to identify what type of
 523          *      message/handshake is passed
 524          */
 525         SSL_set_msg_callback(ssn->ssl, cbtls_msg);
 526         SSL_set_msg_callback_arg(ssn->ssl, ssn);
 527         SSL_set_info_callback(ssn->ssl, cbtls_info);
 528
 529         /*
 530          *      Always verify the peer certificate.
 531          */
 532         DEBUG2("Requiring Server certificate");
 533         verify_mode = SSL_VERIFY_PEER;
 534         verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
 535         SSL_set_verify(ssn->ssl, verify_mode, cbtls_verify);
 536
 537         SSL_set_ex_data(ssn->ssl, FR_TLS_EX_INDEX_CONF, (void *)conf);
 538         SSL_set_ex_data(ssn->ssl, FR_TLS_EX_INDEX_SSN, (void *)ssn);
 539         SSL_set_fd(ssn->ssl, fd);
 540         ret = SSL_connect(ssn->ssl);
 541
 542         if (ret < 0) {
 543                 switch (SSL_get_error(ssn->ssl, ret)) {
 544                         default:
 545                                 break;
 546
 547
 548
 549                 case SSL_ERROR_WANT_READ:
 550                 case SSL_ERROR_WANT_WRITE:
 551                         ssn->connected = false;
 552                         return ssn;
 553                 }
 554         }
 555
 556         if (ret <= 0) {
 557                 tls_error_io_log(NULL, ssn, ret, "Failed in " STRINGIFY(__FUNCTION__) " (SSL_connect)");
 558                 talloc_free(ssn);
 559
 560                 return NULL;
 561         }
 562
 563         ssn->connected = true;
 564         return ssn;
 565 }
 566
 567
 568 /** Create a new TLS session
 569  *
 570  * Configures a new TLS session, configuring options, setting callbacks etc...
 571  *
 572  * @param ctx to alloc session data in. Should usually be NULL unless the lifetime of the
 573  *      session is tied to another talloc'd object.
 574  * @param conf to use to configure the tls session.
 575  * @param request The current #REQUEST.
 576  * @param client_cert Whether to require a client_cert.
 577  * @return a new session on success, or NULL on error.
 578  */
 579 tls_session_t *tls_new_session(TALLOC_CTX *ctx, fr_tls_server_conf_t *conf, REQUEST *request, bool client_cert)
 580 {
 581         tls_session_t   *state = NULL;
 582         SSL             *new_tls = NULL;
 583         int             verify_mode = 0;
 584         VALUE_PAIR      *vp;
 585
 586         rad_assert(request != NULL);
 587
 588         RDEBUG2("Initiating new EAP-TLS session");
 589
 590         /*
 591          *      Manually flush the sessions every so often.  If HALF
 592          *      of the session lifetime has passed since we last
 593          *      flushed, then flush it again.
 594          *
 595          *      FIXME: Also do it every N sessions?
 596          */
 597         if (conf->session_cache_enable &&
 598             ((conf->session_last_flushed + ((int)conf->session_timeout * 1800)) <= request->timestamp)){
 599                 RDEBUG2("Flushing SSL sessions (of #%ld)", SSL_CTX_sess_number(conf->ctx));
 600
 601                 SSL_CTX_flush_sessions(conf->ctx, request->timestamp);
 602                 conf->session_last_flushed = request->timestamp;
 603         }
 604
 605         new_tls = SSL_new(conf->ctx);
 606         if (new_tls == NULL) {
 607                 tls_error_log(request, "Error creating new TLS session");
 608                 return NULL;
 609         }
 610
 611         /* We use the SSL's "app_data" to indicate a call-back */
 612         SSL_set_app_data(new_tls, NULL);
 613
 614         if ((state = talloc_zero(ctx, tls_session_t)) == NULL) {
 615                 RERROR("Error allocating memory for SSL state");
 616                 return NULL;
 617         }
 618         session_init(state);
 619         talloc_set_destructor(state, _tls_session_free);
 620
 621         state->ctx = conf->ctx;
 622         state->ssl = new_tls;
 623
 624         /*
 625          *      Initialize callbacks
 626          */
 627         state->record_init = record_init;
 628         state->record_close = record_close;
 629         state->record_plus = record_plus;
 630         state->record_minus = record_minus;
 631
 632         /*
 633          *      Create & hook the BIOs to handle the dirty side of the
 634          *      SSL.  This is *very important* as we want to handle
 635          *      the transmission part.  Now the only IO interface
 636          *      that SSL is aware of, is our defined BIO buffers.
 637          *
 638          *      This means that all SSL IO is done to/from memory,
 639          *      and we can update those BIOs from the packets we've
 640          *      received.
 641          */
 642         state->into_ssl = BIO_new(BIO_s_mem());
 643         state->from_ssl = BIO_new(BIO_s_mem());
 644         SSL_set_bio(state->ssl, state->into_ssl, state->from_ssl);
 645
 646         /*
 647          *      Add the message callback to identify what type of
 648          *      message/handshake is passed
 649          */
 650         SSL_set_msg_callback(new_tls, cbtls_msg);
 651         SSL_set_msg_callback_arg(new_tls, state);
 652         SSL_set_info_callback(new_tls, cbtls_info);
 653
 654         /*
 655          *      In Server mode we only accept.
 656          */
 657         SSL_set_accept_state(state->ssl);
 658
 659         /*
 660          *      Verify the peer certificate, if asked.
 661          */
 662         if (client_cert) {
 663                 RDEBUG2("Setting verify mode to require certificate from client");
 664                 verify_mode = SSL_VERIFY_PEER;
 665                 verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
 666                 verify_mode |= SSL_VERIFY_CLIENT_ONCE;
 667         }
 668         SSL_set_verify(state->ssl, verify_mode, cbtls_verify);
 669
 670         SSL_set_ex_data(state->ssl, FR_TLS_EX_INDEX_CONF, (void *)conf);
 671         SSL_set_ex_data(state->ssl, FR_TLS_EX_INDEX_SSN, (void *)state);
 672         state->length_flag = conf->include_length;
 673
 674         /*
 675          *      We use default fragment size, unless the Framed-MTU
 676          *      tells us it's too big.  Note that we do NOT account
 677          *      for the EAP-TLS headers if conf->fragment_size is
 678          *      large, because that config item looks to be confusing.
 679          *
 680          *      i.e. it should REALLY be called MTU, and the code here
 681          *      should figure out what that means for TLS fragment size.
 682          *      asking the administrator to know the internal details
 683          *      of EAP-TLS in order to calculate fragment sizes is
 684          *      just too much.
 685          */
 686         state->mtu = conf->fragment_size;
 687         vp = fr_pair_find_by_num(request->packet->vps, PW_FRAMED_MTU, 0, TAG_ANY);
 688         if (vp && (vp->vp_integer > 100) && (vp->vp_integer < state->mtu)) {
 689                 state->mtu = vp->vp_integer;
 690         }
 691
 692         if (conf->session_cache_enable) state->allow_session_resumption = true; /* otherwise it's false */
 693
 694         return state;
 695 }
 696
 697 /*
 698  * We are the server, we always get the dirty data
 699  * (Handshake data is also considered as dirty data)
 700  * During handshake, since SSL API handles itself,
 701  * After clean-up, dirty_out will be filled with
 702  * the data required for handshaking. So we check
 703  * if dirty_out is empty then we simply send it back.
 704  * As of now, if handshake is successful, then we keep going,
 705  * otherwise we fail.
 706  *
 707  * Fill the Bio with the dirty data to clean it
 708  * Get the cleaned data from SSL, if it is not Handshake data
 709  */
 710 int tls_handshake_recv(REQUEST *request, tls_session_t *ssn)
 711 {
 712         int err;
 713
 714         if (ssn->invalid_hb_used) return 0;
 715
 716         err = BIO_write(ssn->into_ssl, ssn->dirty_in.data, ssn->dirty_in.used);
 717         if (err != (int) ssn->dirty_in.used) {
 718                 REDEBUG("Failed writing %zd bytes to SSL BIO: %d", ssn->dirty_in.used, err);
 719                 record_init(&ssn->dirty_in);
 720                 return 0;
 721         }
 722         record_init(&ssn->dirty_in);
 723
 724         err = SSL_read(ssn->ssl, ssn->clean_out.data + ssn->clean_out.used,
 725                        sizeof(ssn->clean_out.data) - ssn->clean_out.used);
 726         if (err > 0) {
 727                 ssn->clean_out.used += err;
 728                 return 1;
 729         }
 730
 731         if (!tls_error_io_log(request, ssn, err, "Failed in " STRINGIFY(__FUNCTION__) " (SSL_read)")) return 0;
 732
 733         /* Some Extra STATE information for easy debugging */
 734         if (SSL_is_init_finished(ssn->ssl)) RDEBUG2("SSL Connection Established");
 735         if (SSL_in_init(ssn->ssl)) RDEBUG2("In SSL Handshake Phase");
 736         if (SSL_in_before(ssn->ssl)) RDEBUG2("Before SSL Handshake Phase");
 737         if (SSL_in_accept_init(ssn->ssl)) RDEBUG2("In SSL Accept mode");
 738         if (SSL_in_connect_init(ssn->ssl)) RDEBUG2("In SSL Connect mode");
 739
 740 #if OPENSSL_VERSION_NUMBER >= 0x10001000L
 741         /*
 742          *      Cache the SSL_SESSION pointer.
 743          */
 744         if (!ssn->ssl_session && SSL_is_init_finished(ssn->ssl)) {
 745                 ssn->ssl_session = SSL_get_session(ssn->ssl);
 746                 if (!ssn->ssl_session) {
 747                         RDEBUG("Failed getting SSL session");
 748                         return 0;
 749                 }
 750         }
 751 #endif
 752
 753         err = BIO_ctrl_pending(ssn->from_ssl);
 754         if (err > 0) {
 755                 err = BIO_read(ssn->from_ssl, ssn->dirty_out.data,
 756                                sizeof(ssn->dirty_out.data));
 757                 if (err > 0) {
 758                         ssn->dirty_out.used = err;
 759
 760                 } else if (BIO_should_retry(ssn->from_ssl)) {
 761                         record_init(&ssn->dirty_in);
 762                         RDEBUG2("Asking for more data in tunnel");
 763                         return 1;
 764
 765                 } else {
 766                         tls_error_log(NULL, NULL);
 767                         record_init(&ssn->dirty_in);
 768                         return 0;
 769                 }
 770         } else {
 771                 RDEBUG2("SSL Application Data");
 772                 /* Its clean application data, do whatever we want */
 773                 record_init(&ssn->clean_out);
 774         }
 775
 776         /* We are done with dirty_in, reinitialize it */
 777         record_init(&ssn->dirty_in);
 778         return 1;
 779 }
 780
 781 /*
 782  *      Take cleartext user data, and encrypt it into the output buffer,
 783  *      to send to the client at the other end of the SSL connection.
 784  */
 785 int tls_handshake_send(REQUEST *request, tls_session_t *ssn)
 786 {
 787         int err;
 788
 789         /*
 790          *      If there's un-encrypted data in 'clean_in', then write
 791          *      that data to the SSL session, and then call the BIO function
 792          *      to get that encrypted data from the SSL session, into
 793          *      a buffer which we can then package into an EAP packet.
 794          *
 795          *      Based on Server's logic this clean_in is expected to
 796          *      contain the data to send to the client.
 797          */
 798         if (ssn->clean_in.used > 0) {
 799                 int written;
 800
 801                 written = SSL_write(ssn->ssl, ssn->clean_in.data, ssn->clean_in.used);
 802                 record_minus(&ssn->clean_in, NULL, written);
 803
 804                 /* Get the dirty data from Bio to send it */
 805                 err = BIO_read(ssn->from_ssl, ssn->dirty_out.data,
 806                                sizeof(ssn->dirty_out.data));
 807                 if (err > 0) {
 808                         ssn->dirty_out.used = err;
 809                 } else {
 810                         if (!tls_error_io_log(request, ssn, err,
 811                                               "Failed in " STRINGIFY(__FUNCTION__) " (SSL_write)")) {
 812                                 return 0;
 813                         }
 814                 }
 815         }
 816
 817         return 1;
 818 }
 819
 820 static void session_init(tls_session_t *ssn)
 821 {
 822         ssn->ssl = NULL;
 823         ssn->into_ssl = ssn->from_ssl = NULL;
 824         record_init(&ssn->clean_in);
 825         record_init(&ssn->clean_out);
 826         record_init(&ssn->dirty_in);
 827         record_init(&ssn->dirty_out);
 828
 829         memset(&ssn->info, 0, sizeof(ssn->info));
 830
 831         ssn->mtu = 0;
 832         ssn->fragment = false;
 833         ssn->tls_msg_len = 0;
 834         ssn->length_flag = false;
 835         ssn->opaque = NULL;
 836         ssn->free_opaque = NULL;
 837 }
 838
 839 static void session_close(tls_session_t *ssn)
 840 {
 841         if (ssn->ssl) {
 842                 SSL_set_quiet_shutdown(ssn->ssl, 1);
 843                 SSL_shutdown(ssn->ssl);
 844
 845                 SSL_free(ssn->ssl);
 846                 ssn->ssl = NULL;
 847         }
 848
 849         record_close(&ssn->clean_in);
 850         record_close(&ssn->clean_out);
 851         record_close(&ssn->dirty_in);
 852         record_close(&ssn->dirty_out);
 853         session_init(ssn);
 854 }
 855
 856 static void record_init(record_t *rec)
 857 {
 858         rec->used = 0;
 859 }
 860
 861 static void record_close(record_t *rec)
 862 {
 863         rec->used = 0;
 864 }
 865
 866
 867 /*
 868  *      Copy data to the intermediate buffer, before we send
 869  *      it somewhere.
 870  */
 871 static unsigned int record_plus(record_t *rec, void const *ptr,
 872                                 unsigned int size)
 873 {
 874         unsigned int added = MAX_RECORD_SIZE - rec->used;
 875
 876         if(added > size)
 877                 added = size;
 878         if(added == 0)
 879                 return 0;
 880         memcpy(rec->data + rec->used, ptr, added);
 881         rec->used += added;
 882         return added;
 883 }
 884
 885 /*
 886  *      Take data from the buffer, and give it to the caller.
 887  */
 888 static unsigned int record_minus(record_t *rec, void *ptr,
 889                                  unsigned int size)
 890 {
 891         unsigned int taken = rec->used;
 892
 893         if(taken > size)
 894                 taken = size;
 895         if(taken == 0)
 896                 return 0;
 897         if(ptr)
 898                 memcpy(ptr, rec->data, taken);
 899         rec->used -= taken;
 900
 901         /*
 902          *      This is pretty bad...
 903          */
 904         if (rec->used > 0) memmove(rec->data, rec->data + taken, rec->used);
 905
 906         return taken;
 907 }
 908
 909 void tls_session_information(tls_session_t *tls_session)
 910 {
 911         char const *str_write_p, *str_version, *str_content_type = "";
 912         char const *str_details1 = "", *str_details2= "";
 913         REQUEST *request;
 914         char buffer[32];
 915
 916         /*
 917          *      Don't print this out in the normal course of
 918          *      operations.
 919          */
 920         if (rad_debug_lvl == 0) return;
 921
 922         str_write_p = tls_session->info.origin ? ">>> send" : "<<< recv";
 923
 924         switch (tls_session->info.version) {
 925         case SSL2_VERSION:
 926                 str_version = "SSL 2.0 ";
 927                 break;
 928         case SSL3_VERSION:
 929                 str_version = "SSL 3.0 ";
 930                 break;
 931         case TLS1_VERSION:
 932                 str_version = "TLS 1.0 ";
 933                 break;
 934 #ifdef TLS1_1_VERSION
 935         case TLS1_1_VERSION:
 936                 str_version = "TLS 1.1 ";
 937                 break;
 938 #endif
 939 #ifdef TLS1_2_VERSION
 940         case TLS1_2_VERSION:
 941                 str_version = "TLS 1.2 ";
 942                 break;
 943 #endif
 944 #ifdef TLS1_3_VERSON
 945         case TLS1_3_VERSION:
 946                 str_version = "TLS 1.3 ";
 947                 break;
 948 #endif
 949
 950         default:
 951                 sprintf(buffer, "UNKNOWN TLS VERSION ?%04X?", tls_session->info.version);
 952                 str_version = buffer;
 953                 break;
 954         }
 955
 956         if (tls_session->info.version == SSL3_VERSION ||
 957             tls_session->info.version == TLS1_VERSION) {
 958                 switch (tls_session->info.content_type) {
 959                 case SSL3_RT_CHANGE_CIPHER_SPEC:
 960                         str_content_type = "ChangeCipherSpec";
 961                         break;
 962
 963                 case SSL3_RT_ALERT:
 964                         str_content_type = "Alert";
 965                         break;
 966
 967                 case SSL3_RT_HANDSHAKE:
 968                         str_content_type = "Handshake";
 969                         break;
 970
 971                 case SSL3_RT_APPLICATION_DATA:
 972                         str_content_type = "ApplicationData";
 973                         break;
 974
 975                 default:
 976                         str_content_type = "UnknownContentType";
 977                         break;
 978                 }
 979
 980                 if (tls_session->info.content_type == SSL3_RT_ALERT) {
 981                         str_details1 = ", ???";
 982
 983                         if (tls_session->info.record_len == 2) {
 984
 985                                 switch (tls_session->info.alert_level) {
 986                                 case SSL3_AL_WARNING:
 987                                         str_details1 = ", warning";
 988                                         break;
 989                                 case SSL3_AL_FATAL:
 990                                         str_details1 = ", fatal";
 991                                         break;
 992                                 }
 993
 994                                 str_details2 = " ???";
 995                                 switch (tls_session->info.alert_description) {
 996                                 case SSL3_AD_CLOSE_NOTIFY:
 997                                         str_details2 = " close_notify";
 998                                         break;
 999
1000                                 case SSL3_AD_UNEXPECTED_MESSAGE:
1001                                         str_details2 = " unexpected_message";
1002                                         break;
1003
1004                                 case SSL3_AD_BAD_RECORD_MAC:
1005                                         str_details2 = " bad_record_mac";
1006                                         break;
1007
1008                                 case TLS1_AD_DECRYPTION_FAILED:
1009                                         str_details2 = " decryption_failed";
1010                                         break;
1011
1012                                 case TLS1_AD_RECORD_OVERFLOW:
1013                                         str_details2 = " record_overflow";
1014                                         break;
1015
1016                                 case SSL3_AD_DECOMPRESSION_FAILURE:
1017                                         str_details2 = " decompression_failure";
1018                                         break;
1019
1020                                 case SSL3_AD_HANDSHAKE_FAILURE:
1021                                         str_details2 = " handshake_failure";
1022                                         break;
1023
1024                                 case SSL3_AD_BAD_CERTIFICATE:
1025                                         str_details2 = " bad_certificate";
1026                                         break;
1027
1028                                 case SSL3_AD_UNSUPPORTED_CERTIFICATE:
1029                                         str_details2 = " unsupported_certificate";
1030                                         break;
1031
1032                                 case SSL3_AD_CERTIFICATE_REVOKED:
1033                                         str_details2 = " certificate_revoked";
1034                                         break;
1035
1036                                 case SSL3_AD_CERTIFICATE_EXPIRED:
1037                                         str_details2 = " certificate_expired";
1038                                         break;
1039
1040                                 case SSL3_AD_CERTIFICATE_UNKNOWN:
1041                                         str_details2 = " certificate_unknown";
1042                                         break;
1043
1044                                 case SSL3_AD_ILLEGAL_PARAMETER:
1045                                         str_details2 = " illegal_parameter";
1046                                         break;
1047
1048                                 case TLS1_AD_UNKNOWN_CA:
1049                                         str_details2 = " unknown_ca";
1050                                         break;
1051
1052                                 case TLS1_AD_ACCESS_DENIED:
1053                                         str_details2 = " access_denied";
1054                                         break;
1055
1056                                 case TLS1_AD_DECODE_ERROR:
1057                                         str_details2 = " decode_error";
1058                                         break;
1059
1060                                 case TLS1_AD_DECRYPT_ERROR:
1061                                         str_details2 = " decrypt_error";
1062                                         break;
1063
1064                                 case TLS1_AD_EXPORT_RESTRICTION:
1065                                         str_details2 = " export_restriction";
1066                                         break;
1067
1068                                 case TLS1_AD_PROTOCOL_VERSION:
1069                                         str_details2 = " protocol_version";
1070                                         break;
1071
1072                                 case TLS1_AD_INSUFFICIENT_SECURITY:
1073                                         str_details2 = " insufficient_security";
1074                                         break;
1075
1076                                 case TLS1_AD_INTERNAL_ERROR:
1077                                         str_details2 = " internal_error";
1078                                         break;
1079
1080                                 case TLS1_AD_USER_CANCELLED:
1081                                         str_details2 = " user_canceled";
1082                                         break;
1083
1084                                 case TLS1_AD_NO_RENEGOTIATION:
1085                                         str_details2 = " no_renegotiation";
1086                                         break;
1087                                 }
1088                         }
1089                 }
1090
1091                 if (tls_session->info.content_type == SSL3_RT_HANDSHAKE) {
1092                         str_details1 = "???";
1093
1094                         if (tls_session->info.record_len > 0) switch (tls_session->info.handshake_type) {
1095                         case SSL3_MT_HELLO_REQUEST:
1096                                 str_details1 = ", HelloRequest";
1097                                 break;
1098
1099                         case SSL3_MT_CLIENT_HELLO:
1100                                 str_details1 = ", ClientHello";
1101                                 break;
1102
1103                         case SSL3_MT_SERVER_HELLO:
1104                                 str_details1 = ", ServerHello";
1105                                 break;
1106
1107                         case SSL3_MT_CERTIFICATE:
1108                                 str_details1 = ", Certificate";
1109                                 break;
1110
1111                         case SSL3_MT_SERVER_KEY_EXCHANGE:
1112                                 str_details1 = ", ServerKeyExchange";
1113                                 break;
1114
1115                         case SSL3_MT_CERTIFICATE_REQUEST:
1116                                 str_details1 = ", CertificateRequest";
1117                                 break;
1118
1119                         case SSL3_MT_SERVER_DONE:
1120                                 str_details1 = ", ServerHelloDone";
1121                                 break;
1122
1123                         case SSL3_MT_CERTIFICATE_VERIFY:
1124                                 str_details1 = ", CertificateVerify";
1125                                 break;
1126
1127                         case SSL3_MT_CLIENT_KEY_EXCHANGE:
1128                                 str_details1 = ", ClientKeyExchange";
1129                                 break;
1130
1131                         case SSL3_MT_FINISHED:
1132                                 str_details1 = ", Finished";
1133                                 break;
1134                         }
1135                 }
1136         }
1137
1138         snprintf(tls_session->info.info_description,
1139                  sizeof(tls_session->info.info_description),
1140                  "%s %s%s [length %04lx]%s%s\n",
1141                  str_write_p, str_version, str_content_type,
1142                  (unsigned long)tls_session->info.record_len,
1143                  str_details1, str_details2);
1144
1145         request = SSL_get_ex_data(tls_session->ssl, FR_TLS_EX_INDEX_REQUEST);
1146         ROPTIONAL(RDEBUG2, DEBUG2, "%s", tls_session->info.info_description);
1147 }
1148
1149 static CONF_PARSER cache_config[] = {
1150         { "enable", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, session_cache_enable), "no" },
1151
1152         { "lifetime", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, session_timeout), "24" },
1153         { "name", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, session_id_name), NULL },
1154
1155         { "max_entries", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, session_cache_size), "255" },
1156         { "persist_dir", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, session_cache_path), NULL },
1157         CONF_PARSER_TERMINATOR
1158 };
1159
1160 static CONF_PARSER verify_config[] = {
1161         { "skip_if_ocsp_ok", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, verify_skip_if_ocsp_ok), "no" },
1162         { "tmpdir", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, verify_tmp_dir), NULL },
1163         { "client", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, verify_client_cert_cmd), NULL },
1164         CONF_PARSER_TERMINATOR
1165 };
1166
1167 #ifdef HAVE_OPENSSL_OCSP_H
1168 static CONF_PARSER ocsp_config[] = {
1169         { "enable", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, ocsp_enable), "no" },
1170         { "override_cert_url", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, ocsp_override_url), "no" },
1171         { "url", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, ocsp_url), NULL },
1172         { "use_nonce", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, ocsp_use_nonce), "yes" },
1173         { "timeout", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, ocsp_timeout), "yes" },
1174         { "softfail", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, ocsp_softfail), "no" },
1175         CONF_PARSER_TERMINATOR
1176 };
1177 #endif
1178
1179 static CONF_PARSER tls_server_config[] = {
1180         { "verify_depth", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, verify_depth), "0" },
1181         { "CA_path", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT | PW_TYPE_DEPRECATED, fr_tls_server_conf_t, ca_path), NULL },
1182         { "ca_path", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_path), NULL },
1183         { "pem_file_type", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, file_type), "yes" },
1184         { "private_key_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, private_key_file), NULL },
1185         { "certificate_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, certificate_file), NULL },
1186         { "CA_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT | PW_TYPE_DEPRECATED, fr_tls_server_conf_t, ca_file), NULL },
1187         { "ca_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_file), NULL },
1188         { "private_key_password", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, fr_tls_server_conf_t, private_key_password), NULL },
1189 #ifdef PSK_MAX_IDENTITY_LEN
1190         { "psk_identity", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, psk_identity), NULL },
1191         { "psk_hexphrase", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, fr_tls_server_conf_t, psk_password), NULL },
1192         { "psk_query", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, psk_query), NULL },
1193 #endif
1194         { "dh_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, dh_file), NULL },
1195         { "random_file", FR_CONF_OFFSET(PW_TYPE_FILE_EXISTS, fr_tls_server_conf_t, random_file), NULL },
1196         { "fragment_size", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, fragment_size), "1024" },
1197         { "include_length", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, include_length), "yes" },
1198         { "auto_chain", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, auto_chain), "yes" },
1199         { "disable_single_dh_use", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_single_dh_use), NULL },
1200         { "check_crl", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, check_crl), "no" },
1201 #ifdef X509_V_FLAG_CRL_CHECK_ALL
1202         { "check_all_crl", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, check_all_crl), "no" },
1203 #endif
1204         { "allow_expired_crl", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, allow_expired_crl), NULL },
1205         { "check_cert_cn", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_cn), NULL },
1206         { "cipher_list", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, cipher_list), NULL },
1207         { "cipher_server_preference", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, cipher_server_preference), NULL },
1208         { "check_cert_issuer", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_issuer), NULL },
1209         { "require_client_cert", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, require_client_cert), NULL },
1210
1211 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
1212 #ifndef OPENSSL_NO_ECDH
1213         { "ecdh_curve", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, ecdh_curve), "prime256v1" },
1214 #endif
1215 #endif
1216
1217 #ifdef SSL_OP_NO_TLSv1
1218         { "disable_tlsv1", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1), NULL },
1219 #endif
1220
1221 #ifdef SSL_OP_NO_TLSv1_1
1222         { "disable_tlsv1_1", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1_1), NULL },
1223 #endif
1224
1225 #ifdef SSL_OP_NO_TLSv1_2
1226         { "disable_tlsv1_2", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1_2), NULL },
1227 #endif
1228
1229         { "cache", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) cache_config },
1230
1231         { "verify", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) verify_config },
1232
1233 #ifdef HAVE_OPENSSL_OCSP_H
1234         { "ocsp", FR_CONF_POINTER(PW_TYPE_SUBSECTION, NULL), (void const *) ocsp_config },
1235 #endif
1236         CONF_PARSER_TERMINATOR
1237 };
1238
1239
1240 static CONF_PARSER tls_client_config[] = {
1241         { "verify_depth", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, verify_depth), "0" },
1242         { "ca_path", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_path), NULL },
1243         { "pem_file_type", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, file_type), "yes" },
1244         { "private_key_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, private_key_file), NULL },
1245         { "certificate_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, certificate_file), NULL },
1246         { "ca_file", FR_CONF_OFFSET(PW_TYPE_FILE_INPUT, fr_tls_server_conf_t, ca_file), NULL },
1247         { "private_key_password", FR_CONF_OFFSET(PW_TYPE_STRING | PW_TYPE_SECRET, fr_tls_server_conf_t, private_key_password), NULL },
1248         { "dh_file", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, dh_file), NULL },
1249         { "random_file", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, random_file), NULL },
1250         { "fragment_size", FR_CONF_OFFSET(PW_TYPE_INTEGER, fr_tls_server_conf_t, fragment_size), "1024" },
1251         { "include_length", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, include_length), "yes" },
1252         { "check_crl", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, check_crl), "no" },
1253         { "check_cert_cn", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_cn), NULL },
1254         { "cipher_list", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, cipher_list), NULL },
1255         { "check_cert_issuer", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, check_cert_issuer), NULL },
1256
1257 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
1258 #ifndef OPENSSL_NO_ECDH
1259         { "ecdh_curve", FR_CONF_OFFSET(PW_TYPE_STRING, fr_tls_server_conf_t, ecdh_curve), "prime256v1" },
1260 #endif
1261 #endif
1262
1263 #ifdef SSL_OP_NO_TLSv1
1264         { "disable_tlsv1", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1), NULL },
1265 #endif
1266
1267 #ifdef SSL_OP_NO_TLSv1_1
1268         { "disable_tlsv1_1", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1_1), NULL },
1269 #endif
1270
1271 #ifdef SSL_OP_NO_TLSv1_2
1272         { "disable_tlsv1_2", FR_CONF_OFFSET(PW_TYPE_BOOLEAN, fr_tls_server_conf_t, disable_tlsv1_2), NULL },
1273 #endif
1274         CONF_PARSER_TERMINATOR
1275 };
1276
1277
1278 /*
1279  *      TODO: Check for the type of key exchange * like conf->dh_key
1280  */
1281 static int load_dh_params(SSL_CTX *ctx, char *file)
1282 {
1283         DH *dh = NULL;
1284         BIO *bio;
1285
1286         if (!file) return 0;
1287
1288         if ((bio = BIO_new_file(file, "r")) == NULL) {
1289                 ERROR(LOG_PREFIX ": Unable to open DH file - %s", file);
1290                 return -1;
1291         }
1292
1293         dh = PEM_read_bio_DHparams(bio, NULL, NULL, NULL);
1294         BIO_free(bio);
1295         if (!dh) {
1296                 WARN(LOG_PREFIX ": Unable to set DH parameters.  DH cipher suites may not work!");
1297                 WARN(LOG_PREFIX ": Fix this by running the OpenSSL command listed in eap.conf");
1298                 return 0;
1299         }
1300
1301         if (SSL_CTX_set_tmp_dh(ctx, dh) < 0) {
1302                 ERROR(LOG_PREFIX ": Unable to set DH parameters");
1303                 DH_free(dh);
1304                 return -1;
1305         }
1306
1307         DH_free(dh);
1308         return 0;
1309 }
1310
1311
1312 /*
1313  *      Print debugging messages, and free data.
1314  */
1315 static void cbtls_remove_session(SSL_CTX *ctx, SSL_SESSION *sess)
1316 {
1317         char                    buffer[2 * MAX_SESSION_SIZE + 1];
1318         fr_tls_server_conf_t    *conf;
1319
1320         tls_session_id(sess, buffer, MAX_SESSION_SIZE);
1321
1322         conf = (fr_tls_server_conf_t *)SSL_CTX_get_app_data(ctx);
1323         if (!conf) {
1324                 DEBUG(LOG_PREFIX ": Failed to find TLS configuration in session");
1325                 return;
1326         }
1327
1328         {
1329                 int rv;
1330                 char filename[256];
1331
1332                 DEBUG2(LOG_PREFIX ": Removing session %s from the cache", buffer);
1333
1334                 /* remove session and any cached VPs */
1335                 snprintf(filename, sizeof(filename), "%s%c%s.asn1",
1336                          conf->session_cache_path, FR_DIR_SEP, buffer);
1337                 rv = unlink(filename);
1338                 if (rv != 0) {
1339                         DEBUG2(LOG_PREFIX ": Could not remove persisted session file %s: %s",
1340                                filename, fr_syserror(errno));
1341                 }
1342                 /* VPs might be absent; might not have been written to disk yet */
1343                 snprintf(filename, sizeof(filename), "%s%c%s.vps",
1344                          conf->session_cache_path, FR_DIR_SEP, buffer);
1345                 unlink(filename);
1346         }
1347
1348         return;
1349 }
1350
1351 static int cbtls_new_session(SSL *ssl, SSL_SESSION *sess)
1352 {
1353         char                    buffer[2 * MAX_SESSION_SIZE + 1];
1354         fr_tls_server_conf_t    *conf;
1355         unsigned char           *sess_blob = NULL;
1356
1357         REQUEST                 *request = SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_REQUEST);
1358
1359         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_CONF);
1360         if (!conf) {
1361                 RWDEBUG("Failed to find TLS configuration in session");
1362                 return 0;
1363         }
1364
1365         tls_session_id(sess, buffer, MAX_SESSION_SIZE);
1366
1367         {
1368                 int fd, rv, todo, blob_len;
1369                 char filename[256];
1370                 unsigned char *p;
1371
1372                 RDEBUG2("Serialising session %s, and storing in cache", buffer);
1373
1374                 /* find out what length data we need */
1375                 blob_len = i2d_SSL_SESSION(sess, NULL);
1376                 if (blob_len < 1) {
1377                         /* something went wrong */
1378                         if (request) RWDEBUG("Session serialisation failed, couldn't determine required buffer length");
1379                         return 0;
1380                 }
1381
1382                 /* Do not convert to TALLOC - Thread safety */
1383                 /* alloc and convert to ASN.1 */
1384                 sess_blob = malloc(blob_len);
1385                 if (!sess_blob) {
1386                         RWDEBUG("Session serialisation failed, couldn't allocate buffer (%d bytes)", blob_len);
1387                         return 0;
1388                 }
1389                 /* openssl mutates &p */
1390                 p = sess_blob;
1391                 rv = i2d_SSL_SESSION(sess, &p);
1392                 if (rv != blob_len) {
1393                         if (request) RWDEBUG("Session serialisation failed");
1394                         goto error;
1395                 }
1396
1397                 /* open output file */
1398                 snprintf(filename, sizeof(filename), "%s%c%s.asn1",
1399                          conf->session_cache_path, FR_DIR_SEP, buffer);
1400                 fd = open(filename, O_RDWR|O_CREAT|O_EXCL, S_IWUSR);
1401                 if (fd < 0) {
1402                         if (request) RERROR("Session serialisation failed, failed opening session file %s: %s",
1403                                             filename, fr_syserror(errno));
1404                         goto error;
1405                 }
1406
1407                 /*
1408                  *      Set the filename to be temporarily write-only.
1409                  */
1410                 if (request) {
1411                         VALUE_PAIR *vp;
1412
1413                         vp = fr_pair_afrom_num(request->state_ctx, PW_TLS_CACHE_FILENAME, 0);
1414                         if (vp) {
1415                                 fr_pair_value_strcpy(vp, filename);
1416                                 fr_pair_add(&request->state, vp);
1417                         }
1418                 }
1419
1420                 todo = blob_len;
1421                 p = sess_blob;
1422                 while (todo > 0) {
1423                         rv = write(fd, p, todo);
1424                         if (rv < 1) {
1425                                 if (request) RWDEBUG("Failed writing session: %s", fr_syserror(errno));
1426                                 close(fd);
1427                                 goto error;
1428                         }
1429                         p += rv;
1430                         todo -= rv;
1431                 }
1432                 close(fd);
1433                 if (request) RWDEBUG("Wrote session %s to %s (%d bytes)", buffer, filename, blob_len);
1434         }
1435
1436 error:
1437         free(sess_blob);
1438
1439         return 0;
1440 }
1441
1442 /** Convert OpenSSL's ASN1_TIME to an epoch time
1443  *
1444  * @param[out] out      Where to write the time_t.
1445  * @param[in] asn1      The ASN1_TIME to convert.
1446  * @return
1447  *      - 0 success.
1448  *      - -1 on failure.
1449  */
1450 static int ocsp_asn1time_to_epoch(time_t *out, char const *asn1)
1451 {
1452         struct          tm t;
1453         char const      *p = asn1, *end = p + strlen(p);
1454
1455         memset(&t, 0, sizeof(t));
1456
1457         if ((end - p) <= 12) {
1458                 if ((end - p) < 2) {
1459                         fr_strerror_printf("ASN1 date string too short, expected 2 additional bytes, got %zu bytes",
1460                                            end - p);
1461                         return -1;
1462                 }
1463
1464                 t.tm_year = (*(p++) - '0') * 10;
1465                 t.tm_year += (*(p++) - '0');
1466                 if (t.tm_year < 70) t.tm_year += 100;
1467         } else {
1468                 t.tm_year = (*(p++) - '0') * 1000;
1469                 t.tm_year += (*(p++) - '0') * 100;
1470                 t.tm_year += (*(p++) - '0') * 10;
1471                 t.tm_year += (*(p++) - '0');
1472                 t.tm_year -= 1900;
1473         }
1474
1475         if ((end - p) < 10) {
1476                 fr_strerror_printf("ASN1 string too short, expected 10 additional bytes, got %zu bytes",
1477                                    end - p);
1478                 return -1;
1479         }
1480
1481         t.tm_mon = (*(p++) - '0') * 10;
1482         t.tm_mon += (*(p++) - '0') - 1; // -1 since January is 0 not 1.
1483         t.tm_mday = (*(p++) - '0') * 10;
1484         t.tm_mday += (*(p++) - '0');
1485         t.tm_hour = (*(p++) - '0') * 10;
1486         t.tm_hour += (*(p++) - '0');
1487         t.tm_min = (*(p++) - '0') * 10;
1488         t.tm_min += (*(p++) - '0');
1489         t.tm_sec = (*(p++) - '0') * 10;
1490         t.tm_sec += (*(p++) - '0');
1491
1492         /* Apparently OpenSSL converts all timestamps to UTC? Maybe? */
1493         *out = timegm(&t);
1494         return 0;
1495 }
1496
1497 #if OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
1498 static SSL_SESSION *cbtls_get_session(SSL *ssl, unsigned char *data, int len, int *copy)
1499 #else
1500 static SSL_SESSION *cbtls_get_session(SSL *ssl, const unsigned char *data, int len, int *copy)
1501 #endif
1502 {
1503         size_t                  size;
1504         char                    buffer[2 * MAX_SESSION_SIZE + 1];
1505         fr_tls_server_conf_t    *conf;
1506         TALLOC_CTX              *talloc_ctx;
1507
1508         SSL_SESSION             *sess = NULL;
1509         unsigned char           *sess_data = NULL;
1510         PAIR_LIST               *pairlist = NULL;
1511
1512         REQUEST                 *request = SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_REQUEST);
1513
1514         rad_assert(request != NULL);
1515
1516         size = len;
1517         if (size > MAX_SESSION_SIZE) size = MAX_SESSION_SIZE;
1518
1519         fr_bin2hex(buffer, data, size);
1520
1521         RDEBUG2("Peer requested cached session: %s", buffer);
1522
1523         *copy = 0;
1524
1525         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_CONF);
1526         if (!conf) {
1527                 RWDEBUG("Failed to find TLS configuration in session");
1528                 return NULL;
1529         }
1530
1531         talloc_ctx = SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_TALLOC);
1532
1533         {
1534                 int             rv, fd, todo;
1535                 char            filename[256];
1536
1537                 unsigned char const     **o;
1538                 unsigned char           **p;
1539                 uint8_t                 *q;
1540
1541                 struct stat     st;
1542                 VALUE_PAIR      *vps = NULL;
1543                 VALUE_PAIR      *vp;
1544
1545                 /* load the actual SSL session */
1546                 snprintf(filename, sizeof(filename), "%s%c%s.asn1", conf->session_cache_path, FR_DIR_SEP, buffer);
1547                 fd = open(filename, O_RDONLY);
1548                 if (fd < 0) {
1549                         RWDEBUG("No persisted session file %s: %s", filename, fr_syserror(errno));
1550                         goto error;
1551                 }
1552
1553                 rv = fstat(fd, &st);
1554                 if (rv < 0) {
1555                         RWDEBUG("Failed stating persisted session file %s: %s", filename, fr_syserror(errno));
1556                         close(fd);
1557                         goto error;
1558                 }
1559
1560                 sess_data = talloc_array(NULL, unsigned char, st.st_size);
1561                 if (!sess_data) {
1562                         RWDEBUG("Failed allocating buffer for persisted session (%d bytes)", (int) st.st_size);
1563                         close(fd);
1564                         goto error;
1565                 }
1566
1567                 q = sess_data;
1568                 todo = st.st_size;
1569                 while (todo > 0) {
1570                         rv = read(fd, q, todo);
1571                         if (rv < 1) {
1572                                 RWDEBUG("Failed reading persisted session: %s", fr_syserror(errno));
1573                                 close(fd);
1574                                 goto error;
1575                         }
1576                         todo -= rv;
1577                         q += rv;
1578                 }
1579                 close(fd);
1580
1581                 /*
1582                  *      OpenSSL mutates what's passed in, so we assign sess_data to q,
1583                  *      so the value of q gets mutated, and not the value of sess_data.
1584                  *
1585                  *      We then need a pointer to hold &q, but it can't be const, because
1586                  *      clang complains about lack of consting in nested pointer types.
1587                  *
1588                  *      So we memcpy the value of that pointer, to one that
1589                  *      does have a const, which we then pass into d2i_SSL_SESSION *sigh*.
1590                  */
1591                 q = sess_data;
1592                 p = &q;
1593                 memcpy(&o, &p, sizeof(o));
1594                 sess = d2i_SSL_SESSION(NULL, o, st.st_size);
1595                 if (!sess) {
1596                         RWDEBUG("Failed loading persisted session: %s", ERR_error_string(ERR_get_error(), NULL));
1597                         goto error;
1598                 }
1599
1600                 /* read in the cached VPs from the .vps file */
1601                 snprintf(filename, sizeof(filename), "%s%c%s.vps",
1602                          conf->session_cache_path, FR_DIR_SEP, buffer);
1603                 rv = pairlist_read(talloc_ctx, filename, &pairlist, 1);
1604                 if (rv < 0) {
1605                         /* not safe to un-persist a session w/o VPs */
1606                         RWDEBUG("Failed loading persisted VPs for session %s", buffer);
1607                         SSL_SESSION_free(sess);
1608                         sess = NULL;
1609                         goto error;
1610                 }
1611
1612                 /*
1613                  *      Enforce client certificate expiration.
1614                  */
1615                 vp = fr_pair_find_by_num(pairlist->reply, PW_TLS_CLIENT_CERT_EXPIRATION, 0, TAG_ANY);
1616                 if (vp) {
1617                         time_t expires;
1618
1619                         if (ocsp_asn1time_to_epoch(&expires, vp->vp_strvalue) < 0) {
1620                                 RDEBUG2("Failed getting certificate expiration, removing cache entry for session %s", buffer);
1621                                 SSL_SESSION_free(sess);
1622                                 sess = NULL;
1623                                 goto error;
1624                         }
1625
1626                         if (expires <= request->timestamp) {
1627                                 RDEBUG2("Certificate has expired, removing cache entry for session %s", buffer);
1628                                 SSL_SESSION_free(sess);
1629                                 sess = NULL;
1630                                 goto error;
1631                         }
1632
1633                         /*
1634                          *      Account for Session-Timeout, if it's available.
1635                          */
1636                         vp = fr_pair_find_by_num(request->reply->vps, PW_SESSION_TIMEOUT, 0, TAG_ANY);
1637                         if (vp) {
1638                                 if ((request->timestamp + vp->vp_integer) > expires) {
1639                                         vp->vp_integer = expires - request->timestamp;
1640                                         RWDEBUG2("Updating Session-Timeout to %u, due to impending certificate expiration",
1641                                                  vp->vp_integer);
1642                                 }
1643                         }
1644                 }
1645
1646                 /* move the cached VPs into the session */
1647                 fr_pair_list_mcopy_by_num(talloc_ctx, &vps, &pairlist->reply, 0, 0, TAG_ANY);
1648
1649                 SSL_SESSION_set_ex_data(sess, fr_tls_ex_index_vps, vps);
1650                 RWDEBUG("Successfully restored session %s", buffer);
1651                 rdebug_pair_list(L_DBG_LVL_2, request, vps, "reply:");
1652         }
1653 error:
1654         if (sess_data) talloc_free(sess_data);
1655         if (pairlist) pairlist_free(&pairlist);
1656
1657         return sess;
1658 }
1659
1660 #ifdef HAVE_OPENSSL_OCSP_H
1661
1662 /** Extract components of OCSP responser URL from a certificate
1663  *
1664  * @param[in] cert to extract URL from.
1665  * @param[out] host_out Portion of the URL (must be freed with free()).
1666  * @param[out] port_out Port portion of the URL (must be freed with free()).
1667  * @param[out] path_out Path portion of the URL (must be freed with free()).
1668  * @param[out] is_https Whether the responder should be contacted using https.
1669  * @return
1670  *      - 0 if no valid URL is contained in the certificate.
1671  *      - 1 if a URL was found and parsed.
1672  *      - -1 if at least one URL was found, but none could be parsed.
1673  */
1674 static int ocsp_parse_cert_url(X509 *cert, char **host_out, char **port_out,
1675                                char **path_out, int *is_https)
1676 {
1677         int                     i;
1678         bool                    found_uri = false;
1679
1680         AUTHORITY_INFO_ACCESS   *aia;
1681         ACCESS_DESCRIPTION      *ad;
1682
1683         aia = X509_get_ext_d2i(cert, NID_info_access, NULL, NULL);
1684
1685         for (i = 0; i < sk_ACCESS_DESCRIPTION_num(aia); i++) {
1686                 ad = sk_ACCESS_DESCRIPTION_value(aia, i);
1687                 if (OBJ_obj2nid(ad->method) != NID_ad_OCSP) continue;
1688                 if (ad->location->type != GEN_URI) continue;
1689                 found_uri = true;
1690
1691                 if (OCSP_parse_url((char *) ad->location->d.ia5->data, host_out,
1692                                    port_out, path_out, is_https)) return 1;
1693         }
1694         return found_uri ? -1 : 0;
1695 }
1696
1697 /*
1698  * This function sends a OCSP request to a defined OCSP responder
1699  * and checks the OCSP response for correctness.
1700  */
1701
1702 /* Maximum leeway in validity period: default 5 minutes */
1703 #define MAX_VALIDITY_PERIOD     (5 * 60)
1704
1705 typedef enum {
1706         OCSP_STATUS_FAILED      = 0,
1707         OCSP_STATUS_OK          = 1,
1708         OCSP_STATUS_SKIPPED     = 2,
1709 } ocsp_status_t;
1710
1711 static ocsp_status_t ocsp_check(REQUEST *request, X509_STORE *store, X509 *issuer_cert, X509 *client_cert,
1712                                 fr_tls_server_conf_t *conf)
1713 {
1714         OCSP_CERTID     *certid;
1715         OCSP_REQUEST    *req;
1716         OCSP_RESPONSE   *resp = NULL;
1717         OCSP_BASICRESP  *bresp = NULL;
1718         char            *host = NULL;
1719         char            *port = NULL;
1720         char            *path = NULL;
1721         char            hostheader[1024];
1722         int             use_ssl = -1;
1723         long            nsec = MAX_VALIDITY_PERIOD, maxage = -1;
1724         BIO             *cbio, *bio_out;
1725         ocsp_status_t   ocsp_status = OCSP_STATUS_FAILED;
1726         int             status;
1727         ASN1_GENERALIZEDTIME *rev, *thisupd, *nextupd;
1728         int             reason;
1729 #if OPENSSL_VERSION_NUMBER >= 0x1000003f
1730         OCSP_REQ_CTX    *ctx;
1731         int             rc;
1732         struct timeval  now;
1733         struct timeval  when;
1734 #endif
1735         VALUE_PAIR      *vp;
1736
1737         /*
1738          * Create OCSP Request
1739          */
1740         certid = OCSP_cert_to_id(NULL, client_cert, issuer_cert);
1741         req = OCSP_REQUEST_new();
1742         OCSP_request_add0_id(req, certid);
1743         if (conf->ocsp_use_nonce) OCSP_request_add1_nonce(req, NULL, 8);
1744
1745         /*
1746          * Send OCSP Request and get OCSP Response
1747          */
1748
1749         /* Get OCSP responder URL */
1750         if (conf->ocsp_override_url) {
1751                 char *url;
1752
1753         use_ocsp_url:
1754                 memcpy(&url, &conf->ocsp_url, sizeof(url));
1755                 /* Reading the libssl src, they do a strdup on the URL, so it could of been const *sigh* */
1756                 OCSP_parse_url(url, &host, &port, &path, &use_ssl);
1757                 if (!host || !port || !path) {
1758                         RWDEBUG("ocsp: Host or port or path missing from configured URL \"%s\".  Not doing OCSP", url);
1759                         goto skipped;
1760                 }
1761         } else {
1762                 int ret;
1763
1764                 ret = ocsp_parse_cert_url(client_cert, &host, &port, &path, &use_ssl);
1765                 switch (ret) {
1766                 case -1:
1767                         RWDEBUG("ocsp: Invalid URL in certificate.  Not doing OCSP");
1768                         break;
1769
1770                 case 0:
1771                         if (conf->ocsp_url) {
1772                                 RWDEBUG("ocsp: No OCSP URL in certificate, falling back to configured URL");
1773                                 goto use_ocsp_url;
1774                         }
1775                         RWDEBUG("ocsp: No OCSP URL in certificate.  Not doing OCSP");
1776                         goto skipped;
1777
1778                 case 1:
1779                         break;
1780                 }
1781         }
1782
1783         RDEBUG2("ocsp: Using responder URL \"http://%s:%s%s\"", host, port, path);
1784
1785         /* Check host and port length are sane, then create Host: HTTP header */
1786         if ((strlen(host) + strlen(port) + 2) > sizeof(hostheader)) {
1787                 RWDEBUG("ocsp: Host and port too long");
1788                 goto skipped;
1789         }
1790         snprintf(hostheader, sizeof(hostheader), "%s:%s", host, port);
1791
1792         /* Setup BIO socket to OCSP responder */
1793         cbio = BIO_new_connect(host);
1794
1795         bio_out = NULL;
1796         if (rad_debug_lvl) {
1797                 if (default_log.dst == L_DST_STDOUT) {
1798                         bio_out = BIO_new_fp(stdout, BIO_NOCLOSE);
1799                 } else if (default_log.dst == L_DST_STDERR) {
1800                         bio_out = BIO_new_fp(stderr, BIO_NOCLOSE);
1801                 }
1802         }
1803
1804         BIO_set_conn_port(cbio, port);
1805 #if OPENSSL_VERSION_NUMBER < 0x1000003f
1806         BIO_do_connect(cbio);
1807
1808         /* Send OCSP request and wait for response */
1809         resp = OCSP_sendreq_bio(cbio, path, req);
1810         if (!resp) {
1811                 REDEBUG("ocsp: Couldn't get OCSP response");
1812                 ocsp_status = OCSP_STATUS_SKIPPED;
1813                 goto ocsp_end;
1814         }
1815 #else
1816         if (conf->ocsp_timeout)
1817                 BIO_set_nbio(cbio, 1);
1818
1819         rc = BIO_do_connect(cbio);
1820         if ((rc <= 0) && ((!conf->ocsp_timeout) || !BIO_should_retry(cbio))) {
1821                 REDEBUG("ocsp: Couldn't connect to OCSP responder");
1822                 ocsp_status = OCSP_STATUS_SKIPPED;
1823                 goto ocsp_end;
1824         }
1825
1826         ctx = OCSP_sendreq_new(cbio, path, NULL, -1);
1827         if (!ctx) {
1828                 REDEBUG("ocsp: Couldn't create OCSP request");
1829                 ocsp_status = OCSP_STATUS_SKIPPED;
1830                 goto ocsp_end;
1831         }
1832
1833         if (!OCSP_REQ_CTX_add1_header(ctx, "Host", hostheader)) {
1834                 REDEBUG("ocsp: Couldn't set Host header");
1835                 ocsp_status = OCSP_STATUS_SKIPPED;
1836                 goto ocsp_end;
1837         }
1838
1839         if (!OCSP_REQ_CTX_set1_req(ctx, req)) {
1840                 REDEBUG("ocsp: Couldn't add data to OCSP request");
1841                 ocsp_status = OCSP_STATUS_SKIPPED;
1842                 goto ocsp_end;
1843         }
1844
1845         gettimeofday(&when, NULL);
1846         when.tv_sec += conf->ocsp_timeout;
1847
1848         do {
1849                 rc = OCSP_sendreq_nbio(&resp, ctx);
1850                 if (conf->ocsp_timeout) {
1851                         gettimeofday(&now, NULL);
1852                         if (!timercmp(&now, &when, <))
1853                                 break;
1854                 }
1855         } while ((rc == -1) && BIO_should_retry(cbio));
1856
1857         if (conf->ocsp_timeout && (rc == -1) && BIO_should_retry(cbio)) {
1858                 REDEBUG("ocsp: Response timed out");
1859                 ocsp_status = OCSP_STATUS_SKIPPED;
1860                 goto ocsp_end;
1861         }
1862
1863         OCSP_REQ_CTX_free(ctx);
1864
1865         if (rc == 0) {
1866                 REDEBUG("ocsp: Couldn't get OCSP response");
1867                 ocsp_status = OCSP_STATUS_SKIPPED;
1868                 goto ocsp_end;
1869         }
1870 #endif
1871
1872         /* Verify OCSP response status */
1873         status = OCSP_response_status(resp);
1874         if (status != OCSP_RESPONSE_STATUS_SUCCESSFUL) {
1875                 REDEBUG("ocsp: Response status: %s", OCSP_response_status_str(status));
1876                 goto ocsp_end;
1877         }
1878         bresp = OCSP_response_get1_basic(resp);
1879         if (conf->ocsp_use_nonce && OCSP_check_nonce(req, bresp)!=1) {
1880                 REDEBUG("ocsp: Response has wrong nonce value");
1881                 goto ocsp_end;
1882         }
1883         if (OCSP_basic_verify(bresp, NULL, store, 0)!=1){
1884                 REDEBUG("ocsp: Couldn't verify OCSP basic response");
1885                 goto ocsp_end;
1886         }
1887
1888         /*      Verify OCSP cert status */
1889         if (!OCSP_resp_find_status(bresp, certid, &status, &reason, &rev, &thisupd, &nextupd)) {
1890                 REDEBUG("ocsp: No Status found");
1891                 goto ocsp_end;
1892         }
1893
1894         if (!OCSP_check_validity(thisupd, nextupd, nsec, maxage)) {
1895                 if (bio_out) {
1896                         BIO_puts(bio_out, "WARNING: Status times invalid.\n");
1897                         ERR_print_errors(bio_out);
1898                 }
1899                 goto ocsp_end;
1900         }
1901
1902         if (bio_out) {
1903                 BIO_puts(bio_out, "\tThis Update: ");
1904                 ASN1_GENERALIZEDTIME_print(bio_out, thisupd);
1905                 BIO_puts(bio_out, "\n");
1906                 if (nextupd) {
1907                         BIO_puts(bio_out, "\tNext Update: ");
1908                         ASN1_GENERALIZEDTIME_print(bio_out, nextupd);
1909                         BIO_puts(bio_out, "\n");
1910                 }
1911         }
1912
1913         switch (status) {
1914         case V_OCSP_CERTSTATUS_GOOD:
1915                 RDEBUG2("ocsp: Cert status: good");
1916                 vp = pair_make_request("TLS-OCSP-Cert-Valid", NULL, T_OP_SET);
1917                 vp->vp_integer = 1;     /* yes */
1918                 ocsp_status = OCSP_STATUS_OK;
1919                 break;
1920
1921         default:
1922                 /* REVOKED / UNKNOWN */
1923                 REDEBUG("ocsp: Cert status: %s", OCSP_cert_status_str(status));
1924                 if (reason != -1) REDEBUG("ocsp: Reason: %s", OCSP_crl_reason_str(reason));
1925
1926                 if (bio_out) {
1927                         BIO_puts(bio_out, "\tRevocation Time: ");
1928                         ASN1_GENERALIZEDTIME_print(bio_out, rev);
1929                         BIO_puts(bio_out, "\n");
1930                 }
1931                 break;
1932         }
1933
1934 ocsp_end:
1935         /* Free OCSP Stuff */
1936         OCSP_REQUEST_free(req);
1937         OCSP_RESPONSE_free(resp);
1938         free(host);
1939         free(port);
1940         free(path);
1941         BIO_free_all(cbio);
1942         if (bio_out) BIO_free(bio_out);
1943         OCSP_BASICRESP_free(bresp);
1944
1945         switch (ocsp_status) {
1946         case OCSP_STATUS_OK:
1947                 RDEBUG2("ocsp: Certificate is valid");
1948                 break;
1949
1950         case OCSP_STATUS_SKIPPED:
1951         skipped:
1952                 vp = pair_make_request("TLS-OCSP-Cert-Valid", NULL, T_OP_SET);
1953                 vp->vp_integer = 2;     /* skipped */
1954                 if (conf->ocsp_softfail) {
1955                         RWDEBUG("ocsp: Unable to check certificate, assuming it's valid");
1956                         RWDEBUG("ocsp: This may be insecure");
1957
1958                         /* Remove OpenSSL errors from queue or handshake will fail */
1959                         while (ERR_get_error());
1960
1961                         ocsp_status = OCSP_STATUS_SKIPPED;
1962                 } else {
1963                         REDEBUG("ocsp: Unable to check certificate, failing");
1964                         ocsp_status = OCSP_STATUS_FAILED;
1965                 }
1966                 break;
1967
1968         default:
1969                 vp = pair_make_request("TLS-OCSP-Cert-Valid", NULL, T_OP_SET);
1970                 vp->vp_integer = 0;     /* no */
1971                 REDEBUG("ocsp: Certificate has been expired/revoked");
1972                 break;
1973         }
1974
1975         return ocsp_status;
1976 }
1977 #endif  /* HAVE_OPENSSL_OCSP_H */
1978
1979 /*
1980  *      For creating certificate attributes.
1981  */
1982 static char const *cert_attr_names[8][2] = {
1983         { "TLS-Client-Cert-Serial",                     "TLS-Cert-Serial" },
1984         { "TLS-Client-Cert-Expiration",                 "TLS-Cert-Expiration" },
1985         { "TLS-Client-Cert-Subject",                    "TLS-Cert-Subject" },
1986         { "TLS-Client-Cert-Issuer",                     "TLS-Cert-Issuer" },
1987         { "TLS-Client-Cert-Common-Name",                "TLS-Cert-Common-Name" },
1988         { "TLS-Client-Cert-Subject-Alt-Name-Email",     "TLS-Cert-Subject-Alt-Name-Email" },
1989         { "TLS-Client-Cert-Subject-Alt-Name-Dns",       "TLS-Cert-Subject-Alt-Name-Dns" },
1990         { "TLS-Client-Cert-Subject-Alt-Name-Upn",       "TLS-Cert-Subject-Alt-Name-Upn" }
1991 };
1992
1993 #define FR_TLS_SERIAL           (0)
1994 #define FR_TLS_EXPIRATION       (1)
1995 #define FR_TLS_SUBJECT          (2)
1996 #define FR_TLS_ISSUER           (3)
1997 #define FR_TLS_CN               (4)
1998 #define FR_TLS_SAN_EMAIL        (5)
1999 #define FR_TLS_SAN_DNS          (6)
2000 #define FR_TLS_SAN_UPN          (7)
2001
2002 /*
2003  *      Before trusting a certificate, you must make sure that the
2004  *      certificate is 'valid'. There are several steps that your
2005  *      application can take in determining if a certificate is
2006  *      valid. Commonly used steps are:
2007  *
2008  *      1.Verifying the certificate's signature, and verifying that
2009  *      the certificate has been issued by a trusted Certificate
2010  *      Authority.
2011  *
2012  *      2.Verifying that the certificate is valid for the present date
2013  *      (i.e. it is being presented within its validity dates).
2014  *
2015  *      3.Verifying that the certificate has not been revoked by its
2016  *      issuing Certificate Authority, by checking with respect to a
2017  *      Certificate Revocation List (CRL).
2018  *
2019  *      4.Verifying that the credentials presented by the certificate
2020  *      fulfill additional requirements specific to the application,
2021  *      such as with respect to access control lists or with respect
2022  *      to OCSP (Online Certificate Status Processing).
2023  *
2024  *      NOTE: This callback will be called multiple times based on the
2025  *      depth of the root certificate chain
2026  */
2027 int cbtls_verify(int ok, X509_STORE_CTX *ctx)
2028 {
2029         char            subject[1024]; /* Used for the subject name */
2030         char            issuer[1024]; /* Used for the issuer name */
2031         char            attribute[1024];
2032         char            value[1024];
2033         char            common_name[1024];
2034         char            cn_str[1024];
2035         char            buf[64];
2036         X509            *client_cert;
2037 #if OPENSSL_VERSION_NUMBER >= 0x10100000L
2038         const STACK_OF(X509_EXTENSION) *ext_list;
2039 #else
2040         STACK_OF(X509_EXTENSION) *ext_list;
2041 #endif
2042         SSL             *ssl;
2043         int             err, depth, lookup, loc;
2044         fr_tls_server_conf_t *conf;
2045         int             my_ok = ok;
2046
2047         ASN1_INTEGER    *sn = NULL;
2048         ASN1_TIME       *asn_time = NULL;
2049         VALUE_PAIR      **certs;
2050         char **identity;
2051 #ifdef HAVE_OPENSSL_OCSP_H
2052         X509_STORE      *ocsp_store = NULL;
2053         X509            *issuer_cert;
2054         bool            do_verify = false;
2055 #endif
2056         VALUE_PAIR      *vp;
2057         TALLOC_CTX      *talloc_ctx;
2058
2059         REQUEST         *request;
2060
2061         client_cert = X509_STORE_CTX_get_current_cert(ctx);
2062         err = X509_STORE_CTX_get_error(ctx);
2063         depth = X509_STORE_CTX_get_error_depth(ctx);
2064
2065         lookup = depth;
2066
2067         /*
2068          *      Log client/issuing cert.  If there's an error, log
2069          *      issuing cert.
2070          */
2071         if ((lookup > 1) && !my_ok) lookup = 1;
2072
2073         /*
2074          * Retrieve the pointer to the SSL of the connection currently treated
2075          * and the application specific data stored into the SSL object.
2076          */
2077         ssl = X509_STORE_CTX_get_ex_data(ctx, SSL_get_ex_data_X509_STORE_CTX_idx());
2078         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_CONF);
2079         if (!conf) return 1;
2080
2081         request = (REQUEST *)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_REQUEST);
2082         rad_assert(request != NULL);
2083         certs = (VALUE_PAIR **)SSL_get_ex_data(ssl, fr_tls_ex_index_certs);
2084
2085         identity = (char **)SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_IDENTITY);
2086 #ifdef HAVE_OPENSSL_OCSP_H
2087         ocsp_store = conf->ocsp_store;
2088 #endif
2089
2090         talloc_ctx = SSL_get_ex_data(ssl, FR_TLS_EX_INDEX_TALLOC);
2091
2092         /*
2093          *      Get the Serial Number
2094          */
2095         buf[0] = '\0';
2096         sn = X509_get_serialNumber(client_cert);
2097
2098         RDEBUG2("Creating attributes from certificate OIDs");
2099         RINDENT();
2100
2101         /*
2102          *      For this next bit, we create the attributes *only* if
2103          *      we're at the client or issuing certificate, AND we
2104          *      have a user identity.  i.e. we don't create the
2105          *      attributes for RadSec connections.
2106          */
2107         if (certs && identity &&
2108             (lookup <= 1) && sn && ((size_t) sn->length < (sizeof(buf) / 2))) {
2109                 char *p = buf;
2110                 int i;
2111
2112                 for (i = 0; i < sn->length; i++) {
2113                         sprintf(p, "%02x", (unsigned int)sn->data[i]);
2114                         p += 2;
2115                 }
2116                 vp = fr_pair_make(talloc_ctx, certs, cert_attr_names[FR_TLS_SERIAL][lookup], buf, T_OP_SET);
2117                 rdebug_pair(L_DBG_LVL_2, request, vp, NULL);
2118         }
2119
2120
2121         /*
2122          *      Get the Expiration Date
2123          */
2124         buf[0] = '\0';
2125         asn_time = X509_get_notAfter(client_cert);
2126         if (certs && identity && (lookup <= 1) && asn_time &&
2127             (asn_time->length < (int) sizeof(buf))) {
2128                 memcpy(buf, (char*) asn_time->data, asn_time->length);
2129                 buf[asn_time->length] = '\0';
2130                 vp = fr_pair_make(talloc_ctx, certs, cert_attr_names[FR_TLS_EXPIRATION][lookup], buf, T_OP_SET);
2131                 rdebug_pair(L_DBG_LVL_2, request, vp, NULL);
2132         }
2133
2134         /*
2135          *      Get the Subject & Issuer
2136          */
2137         subject[0] = issuer[0] = '\0';
2138         X509_NAME_oneline(X509_get_subject_name(client_cert), subject,
2139                           sizeof(subject));
2140         subject[sizeof(subject) - 1] = '\0';
2141         if (certs && identity && (lookup <= 1) && subject[0]) {
2142                 vp = fr_pair_make(talloc_ctx, certs, cert_attr_names[FR_TLS_SUBJECT][lookup], subject, T_OP_SET);
2143                 rdebug_pair(L_DBG_LVL_2, request, vp, NULL);
2144         }
2145
2146         X509_NAME_oneline(X509_get_issuer_name(client_cert), issuer,
2147                           sizeof(issuer));
2148         issuer[sizeof(issuer) - 1] = '\0';
2149         if (certs && identity && (lookup <= 1) && issuer[0]) {
2150                 vp = fr_pair_make(talloc_ctx, certs, cert_attr_names[FR_TLS_ISSUER][lookup], issuer, T_OP_SET);
2151                 rdebug_pair(L_DBG_LVL_2, request, vp, NULL);
2152         }
2153
2154         /*
2155          *      Get the Common Name, if there is a subject.
2156          */
2157         X509_NAME_get_text_by_NID(X509_get_subject_name(client_cert),
2158                                   NID_commonName, common_name, sizeof(common_name));
2159         common_name[sizeof(common_name) - 1] = '\0';
2160         if (certs && identity && (lookup <= 1) && common_name[0] && subject[0]) {
2161                 vp = fr_pair_make(talloc_ctx, certs, cert_attr_names[FR_TLS_CN][lookup], common_name, T_OP_SET);
2162                 rdebug_pair(L_DBG_LVL_2, request, vp, NULL);
2163         }
2164
2165         /*
2166          *      Get the RFC822 Subject Alternative Name
2167          */
2168         loc = X509_get_ext_by_NID(client_cert, NID_subject_alt_name, -1);
2169         if (certs && (lookup <= 1) && (loc >= 0)) {
2170                 X509_EXTENSION *ext = NULL;
2171                 GENERAL_NAMES *names = NULL;
2172                 int i;
2173
2174                 if ((ext = X509_get_ext(client_cert, loc)) &&
2175                     (names = X509V3_EXT_d2i(ext))) {
2176                         for (i = 0; i < sk_GENERAL_NAME_num(names); i++) {
2177                                 GENERAL_NAME *name = sk_GENERAL_NAME_value(names, i);
2178
2179                                 switch (name->type) {
2180 #ifdef GEN_EMAIL
2181                                 case GEN_EMAIL:
2182                                         vp = fr_pair_make(talloc_ctx, certs, cert_attr_names[FR_TLS_SAN_EMAIL][lookup],
2183                                                       (char const *) ASN1_STRING_get0_data(name->d.rfc822Name), T_OP_SET);
2184                                         rdebug_pair(L_DBG_LVL_2, request, vp, NULL);
2185                                         break;
2186 #endif  /* GEN_EMAIL */
2187 #ifdef GEN_DNS
2188                                 case GEN_DNS:
2189                                         vp = fr_pair_make(talloc_ctx, certs, cert_attr_names[FR_TLS_SAN_DNS][lookup],
2190                                                       (char const *) ASN1_STRING_get0_data(name->d.dNSName), T_OP_SET);
2191                                         rdebug_pair(L_DBG_LVL_2, request, vp, NULL);
2192                                         break;
2193 #endif  /* GEN_DNS */
2194 #ifdef GEN_OTHERNAME
2195                                 case GEN_OTHERNAME:
2196                                         /* look for a MS UPN */
2197                                         if (NID_ms_upn == OBJ_obj2nid(name->d.otherName->type_id)) {
2198                                             /* we've got a UPN - Must be ASN1-encoded UTF8 string */
2199                                             if (name->d.otherName->value->type == V_ASN1_UTF8STRING) {
2200                                                     vp = fr_pair_make(talloc_ctx, certs, cert_attr_names[FR_TLS_SAN_UPN][lookup],
2201                                                                   (char const *) ASN1_STRING_get0_data(name->d.otherName->value->value.utf8string), T_OP_SET);
2202                                                     rdebug_pair(L_DBG_LVL_2, request, vp, NULL);
2203                                                 break;
2204                                             } else {
2205                                                 RWARN("Invalid UPN in Subject Alt Name (should be UTF-8)");
2206                                                 break;
2207                                             }
2208                                         }
2209                                         break;
2210 #endif  /* GEN_OTHERNAME */
2211                                 default:
2212                                         /* XXX TODO handle other SAN types */
2213                                         break;
2214                                 }
2215                         }
2216                 }
2217                 if (names != NULL)
2218                         GENERAL_NAMES_free(names);
2219         }
2220
2221         /*
2222          *      If the CRL has expired, that might still be OK.
2223          */
2224         if (!my_ok &&
2225             (conf->allow_expired_crl) &&
2226             (err == X509_V_ERR_CRL_HAS_EXPIRED)) {
2227                 my_ok = 1;
2228                 X509_STORE_CTX_set_error( ctx, 0 );
2229         }
2230
2231         if (!my_ok) {
2232                 char const *p = X509_verify_cert_error_string(err);
2233                 RERROR("SSL says error %d : %s", err, p);
2234                 REXDENT();
2235                 return my_ok;
2236         }
2237
2238         if (lookup == 0) {
2239 #if OPENSSL_VERSION_NUMBER >= 0x10100000L && !defined(LIBRESSL_VERSION_NUMBER)
2240                 ext_list = X509_get0_extensions(client_cert);
2241 #else
2242                 X509_CINF       *client_inf;
2243                 client_inf = client_cert->cert_info;
2244                 ext_list = client_inf->extensions;
2245 #endif
2246         } else {
2247                 ext_list = NULL;
2248         }
2249
2250         /*
2251          *      Grab the X509 extensions, and create attributes out of them.
2252          *      For laziness, we re-use the OpenSSL names
2253          */
2254         if (certs && (sk_X509_EXTENSION_num(ext_list) > 0)) {
2255                 int i, len;
2256                 char *p;
2257                 BIO *out;
2258
2259                 out = BIO_new(BIO_s_mem());
2260                 strlcpy(attribute, "TLS-Client-Cert-", sizeof(attribute));
2261
2262                 for (i = 0; i < sk_X509_EXTENSION_num(ext_list); i++) {
2263                         ASN1_OBJECT *obj;
2264                         X509_EXTENSION *ext;
2265
2266                         ext = sk_X509_EXTENSION_value(ext_list, i);
2267
2268                         obj = X509_EXTENSION_get_object(ext);
2269                         i2a_ASN1_OBJECT(out, obj);
2270                         len = BIO_read(out, attribute + 16 , sizeof(attribute) - 16 - 1);
2271                         if (len <= 0) continue;
2272
2273                         attribute[16 + len] = '\0';
2274
2275                         for (p = attribute + 16; *p != '\0'; p++) {
2276                                 if (*p == ' ') *p = '-';
2277                         }
2278
2279                         X509V3_EXT_print(out, ext, 0, 0);
2280                         len = BIO_read(out, value , sizeof(value) - 1);
2281                         if (len <= 0) continue;
2282
2283                         value[len] = '\0';
2284
2285                         vp = fr_pair_make(talloc_ctx, certs, attribute, value, T_OP_ADD);
2286                         if (!vp) {
2287                                 RDEBUG3("Skipping %s += '%s'.  Please check that both the "
2288                                         "attribute and value are defined in the dictionaries",
2289                                         attribute, value);
2290                         } else {
2291                                 /*
2292                                  *      rdebug_pair_list indents (so pre REXDENT())
2293                                  */
2294                                 REXDENT();
2295                                 rdebug_pair_list(L_DBG_LVL_2, request, vp, NULL);
2296                                 RINDENT();
2297                         }
2298                 }
2299
2300                 BIO_free_all(out);
2301         }
2302
2303         REXDENT();
2304
2305         switch (X509_STORE_CTX_get_error(ctx)) {
2306         case X509_V_ERR_UNABLE_TO_GET_ISSUER_CERT:
2307                 RERROR("issuer=%s", issuer);
2308                 break;
2309
2310         case X509_V_ERR_CERT_NOT_YET_VALID:
2311         case X509_V_ERR_ERROR_IN_CERT_NOT_BEFORE_FIELD:
2312                 RERROR("notBefore=");
2313 #if 0
2314                 ASN1_TIME_print(bio_err, X509_get_notBefore(ctx->current_cert));
2315 #endif
2316                 break;
2317
2318         case X509_V_ERR_CERT_HAS_EXPIRED:
2319         case X509_V_ERR_ERROR_IN_CERT_NOT_AFTER_FIELD:
2320                 RERROR("notAfter=");
2321 #if 0
2322                 ASN1_TIME_print(bio_err, X509_get_notAfter(ctx->current_cert));
2323 #endif
2324                 break;
2325         }
2326
2327         /*
2328          *      If we're at the actual client cert, apply additional
2329          *      checks.
2330          */
2331         if (depth == 0) {
2332                 /*
2333                  *      If the conf tells us to, check cert issuer
2334                  *      against the specified value and fail
2335                  *      verification if they don't match.
2336                  */
2337                 if (conf->check_cert_issuer &&
2338                     (strcmp(issuer, conf->check_cert_issuer) != 0)) {
2339                         AUTH(LOG_PREFIX ": Certificate issuer (%s) does not match specified value (%s)!",
2340                              issuer, conf->check_cert_issuer);
2341                         my_ok = 0;
2342                 }
2343
2344                 /*
2345                  *      If the conf tells us to, check the CN in the
2346                  *      cert against xlat'ed value, but only if the
2347                  *      previous checks passed.
2348                  */
2349                 if (my_ok && conf->check_cert_cn) {
2350                         if (radius_xlat(cn_str, sizeof(cn_str), request, conf->check_cert_cn, NULL, NULL) < 0) {
2351                                 /* if this fails, fail the verification */
2352                                 my_ok = 0;
2353                         } else {
2354                                 RDEBUG2("checking certificate CN (%s) with xlat'ed value (%s)", common_name, cn_str);
2355                                 if (strcmp(cn_str, common_name) != 0) {
2356                                         AUTH(LOG_PREFIX ": Certificate CN (%s) does not match specified value (%s)!",
2357                                              common_name, cn_str);
2358                                         my_ok = 0;
2359                                 }
2360                         }
2361                 } /* check_cert_cn */
2362
2363 #ifdef HAVE_OPENSSL_OCSP_H
2364                 if (my_ok) {
2365                         /*
2366                          *      No OCSP, allow external verification.
2367                          */
2368                         if (!conf->ocsp_enable) {
2369                                 do_verify = true;
2370
2371                         } else {
2372                                 RDEBUG2("Starting OCSP Request");
2373                                 if ((X509_STORE_CTX_get1_issuer(&issuer_cert, ctx, client_cert) != 1) ||
2374                                     !issuer_cert) {
2375                                         /*
2376                                          *      Allow for external verify.
2377                                          */
2378                                         RERROR("Couldn't get issuer_cert for %s", common_name);
2379                                         do_verify = true;
2380
2381                                 } else {
2382                                         /*
2383                                          *      Do the full OCSP checks.
2384                                          *
2385                                          *      If they fail, don't run the external verify.  We don't want
2386                                          *      to allow admins to force authentication success for bad
2387                                          *      certificates.
2388                                          *
2389                                          *      If the OCSP checks succeed, check whether we still want to
2390                                          *      run the external verification routine.  If it's marked as
2391                                          *      "skip verify on OK", then we don't do verify.
2392                                          */
2393                                         my_ok = ocsp_check(request, ocsp_store, issuer_cert, client_cert, conf);
2394                                         if (my_ok != OCSP_STATUS_FAILED) {
2395                                                 do_verify = !conf->verify_skip_if_ocsp_ok;
2396                                         }
2397                                 }
2398                         }
2399                 }
2400 #endif
2401
2402                 if ((my_ok != OCSP_STATUS_FAILED)
2403 #ifdef HAVE_OPENSSL_OCSP_H
2404                     && do_verify
2405 #endif
2406                         ) while (conf->verify_client_cert_cmd) {
2407                         char filename[256];
2408                         int fd;
2409                         FILE *fp;
2410
2411                         snprintf(filename, sizeof(filename), "%s/%s.client.XXXXXXXX",
2412                                  conf->verify_tmp_dir, main_config.name);
2413                         fd = mkstemp(filename);
2414                         if (fd < 0) {
2415                                 RDEBUG("Failed creating file in %s: %s",
2416                                        conf->verify_tmp_dir, fr_syserror(errno));
2417                                 break;
2418                         }
2419
2420                         fp = fdopen(fd, "w");
2421                         if (!fp) {
2422                                 close(fd);
2423                                 RDEBUG("Failed opening file %s: %s",
2424                                        filename, fr_syserror(errno));
2425                                 break;
2426                         }
2427
2428                         if (!PEM_write_X509(fp, client_cert)) {
2429                                 fclose(fp);
2430                                 RDEBUG("Failed writing certificate to file");
2431                                 goto do_unlink;
2432                         }
2433                         fclose(fp);
2434
2435                         if (!pair_make_request("TLS-Client-Cert-Filename",
2436                                              filename, T_OP_SET)) {
2437                                 RDEBUG("Failed creating TLS-Client-Cert-Filename");
2438
2439                                 goto do_unlink;
2440                         }
2441
2442                         RDEBUG("Verifying client certificate: %s", conf->verify_client_cert_cmd);
2443                         if (radius_exec_program(request, NULL, 0, NULL, request, conf->verify_client_cert_cmd,
2444                                                 request->packet->vps,
2445                                                 true, true, EXEC_TIMEOUT) != 0) {
2446                                 AUTH(LOG_PREFIX ": Certificate CN (%s) fails external verification!", common_name);
2447                                 my_ok = 0;
2448
2449                         } else  if (request) {
2450                                 RDEBUG("Client certificate CN %s passed external validation", common_name);
2451                         }
2452
2453                 do_unlink:
2454                         unlink(filename);
2455                         break;
2456                 }
2457         } /* depth == 0 */
2458
2459         if (certs && request && !my_ok) {
2460                 fr_pair_add(&request->packet->vps, fr_pair_list_copy(request->packet, *certs));
2461         }
2462
2463         if (RDEBUG_ENABLED3) {
2464                 RDEBUG3("chain-depth   : %d", depth);
2465                 RDEBUG3("error         : %d", err);
2466
2467                 if (identity) RDEBUG3("identity      : %s", *identity);
2468                 RDEBUG3("common name   : %s", common_name);
2469                 RDEBUG3("subject       : %s", subject);
2470                 RDEBUG3("issuer        : %s", issuer);
2471                 RDEBUG3("verify return : %d", my_ok);
2472         }
2473
2474         return (my_ok != 0);
2475 }
2476
2477
2478 #ifdef HAVE_OPENSSL_OCSP_H
2479 /*
2480  *      Create Global X509 revocation store and use it to verify
2481  *      OCSP responses
2482  *
2483  *      - Load the trusted CAs
2484  *      - Load the trusted issuer certificates
2485  */
2486 static X509_STORE *init_revocation_store(fr_tls_server_conf_t *conf)
2487 {
2488         X509_STORE *store = NULL;
2489
2490         store = X509_STORE_new();
2491
2492         /* Load the CAs we trust */
2493         if (conf->ca_file || conf->ca_path)
2494                 if (!X509_STORE_load_locations(store, conf->ca_file, conf->ca_path)) {
2495                         tls_error_log(NULL, "Error reading Trusted root CA list \"%s\"", conf->ca_file);
2496                         return NULL;
2497                 }
2498
2499 #ifdef X509_V_FLAG_CRL_CHECK
2500         if (conf->check_crl)
2501                 X509_STORE_set_flags(store, X509_V_FLAG_CRL_CHECK);
2502 #endif
2503 #ifdef X509_V_FLAG_CRL_CHECK_ALL
2504         if (conf->check_all_crl)
2505                 X509_STORE_set_flags(store, X509_V_FLAG_CRL_CHECK_ALL);
2506 #endif
2507         return store;
2508 }
2509 #endif  /* HAVE_OPENSSL_OCSP_H */
2510
2511 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
2512 #ifndef OPENSSL_NO_ECDH
2513 static int set_ecdh_curve(SSL_CTX *ctx, char const *ecdh_curve, bool disable_single_dh_use)
2514 {
2515         int      nid;
2516         EC_KEY  *ecdh;
2517
2518         if (!ecdh_curve || !*ecdh_curve) return 0;
2519
2520         nid = OBJ_sn2nid(ecdh_curve);
2521         if (!nid) {
2522                 ERROR(LOG_PREFIX ": Unknown ecdh_curve \"%s\"", ecdh_curve);
2523                 return -1;
2524         }
2525
2526         ecdh = EC_KEY_new_by_curve_name(nid);
2527         if (!ecdh) {
2528                 ERROR(LOG_PREFIX ": Unable to create new curve \"%s\"", ecdh_curve);
2529                 return -1;
2530         }
2531
2532         SSL_CTX_set_tmp_ecdh(ctx, ecdh);
2533
2534         if (!disable_single_dh_use) {
2535                 SSL_CTX_set_options(ctx, SSL_OP_SINGLE_ECDH_USE);
2536         }
2537
2538         EC_KEY_free(ecdh);
2539
2540         return 0;
2541 }
2542 #endif
2543 #endif
2544
2545 /*
2546  * DIE OPENSSL DIE DIE DIE
2547  *
2548  * What a palaver, just to free some data attached the
2549  * session. We need to do this because the "remove" callback
2550  * is called when refcount > 0 sometimes, if another thread
2551  * is using the session
2552  */
2553 static void sess_free_vps(UNUSED void *parent, void *data_ptr,
2554                                 UNUSED CRYPTO_EX_DATA *ad, UNUSED int idx,
2555                                 UNUSED long argl, UNUSED void *argp)
2556 {
2557         VALUE_PAIR *vp = data_ptr;
2558         if (!vp) return;
2559
2560         DEBUG2(LOG_PREFIX ": Freeing cached session VPs");
2561
2562         fr_pair_list_free(&vp);
2563 }
2564
2565 static void sess_free_certs(UNUSED void *parent, void *data_ptr,
2566                                 UNUSED CRYPTO_EX_DATA *ad, UNUSED int idx,
2567                                 UNUSED long argl, UNUSED void *argp)
2568 {
2569         VALUE_PAIR **certs = data_ptr;
2570         if (!certs) return;
2571
2572         DEBUG2(LOG_PREFIX ": Freeing cached session Certificates");
2573
2574         fr_pair_list_free(certs);
2575 }
2576
2577 /** Add all the default ciphers and message digests reate our context.
2578  *
2579  * This should be called exactly once from main, before reading the main config
2580  * or initialising any modules.
2581  */
2582 void tls_global_init(void)
2583 {
2584         SSL_load_error_strings();       /* readable error messages (examples show call before library_init) */
2585         SSL_library_init();             /* initialize library */
2586         OpenSSL_add_all_algorithms();   /* required for SHA2 in OpenSSL < 0.9.8o and 1.0.0.a */
2587         CONF_modules_load_file(NULL, NULL, 0);
2588
2589         /*
2590          *      Initialize the index for the certificates.
2591          */
2592         fr_tls_ex_index_certs = SSL_SESSION_get_ex_new_index(0, NULL, NULL, NULL, sess_free_certs);
2593 }
2594
2595 #ifdef ENABLE_OPENSSL_VERSION_CHECK
2596 /** Check for vulnerable versions of libssl
2597  *
2598  * @param acknowledged The highest CVE number a user has confirmed is not present in the system's libssl.
2599  * @return 0 if the CVE specified by the user matches the most recent CVE we have, else -1.
2600  */
2601 int tls_global_version_check(char const *acknowledged)
2602 {
2603         uint64_t v;
2604         bool bad = false;
2605         size_t i;
2606
2607         if (strcmp(acknowledged, "yes") == 0) return 0;
2608
2609         /* Check for bad versions */
2610         v = (uint64_t) SSLeay();
2611
2612         for (i = 0; i < (sizeof(libssl_defects) / sizeof(*libssl_defects)); i++) {
2613                 libssl_defect_t *defect = &libssl_defects[i];
2614
2615                 if ((v >= defect->low) && (v <= defect->high)) {
2616                         /*
2617                          *      If the CVE is acknowledged, allow it.
2618                          */
2619                         if (!bad && (strcmp(acknowledged, defect->id) == 0)) return 0;
2620
2621                         ERROR("Refusing to start with libssl version %s (in range %s)",
2622                               ssl_version(), ssl_version_range(defect->low, defect->high));
2623                         ERROR("Security advisory %s (%s)", defect->id, defect->name);
2624                         ERROR("%s", defect->comment);
2625
2626                         /*
2627                          *      Only warn about the first one...
2628                          */
2629                         if (!bad) {
2630                                 INFO("Once you have verified libssl has been correctly patched, "
2631                                      "set security.allow_vulnerable_openssl = '%s'", defect->id);
2632
2633                                 bad = true;
2634                         }
2635                 }
2636         }
2637
2638         if (bad) return -1;
2639
2640         return 0;
2641 }
2642 #endif
2643
2644 /** Free any memory alloced by libssl
2645  *
2646  */
2647 void tls_global_cleanup(void)
2648 {
2649 #if OPENSSL_VERSION_NUMBER < 0x10000000L
2650         ERR_remove_state(0);
2651 #elif OPENSSL_VERSION_NUMBER < 0x10100000L || defined(LIBRESSL_VERSION_NUMBER)
2652         ERR_remove_thread_state(NULL);
2653 #endif
2654         ENGINE_cleanup();
2655         CONF_modules_unload(1);
2656         ERR_free_strings();
2657         EVP_cleanup();
2658         CRYPTO_cleanup_all_ex_data();
2659 }
2660
2661 /** Create SSL context
2662  *
2663  * - Load the trusted CAs
2664  * - Load the Private key & the certificate
2665  * - Set the Context options & Verify options
2666  */
2667 SSL_CTX *tls_init_ctx(fr_tls_server_conf_t *conf, int client)
2668 {
2669         SSL_CTX         *ctx;
2670         X509_STORE      *certstore;
2671         int             verify_mode = SSL_VERIFY_NONE;
2672         int             ctx_options = 0;
2673         int             ctx_tls_versions = 0;
2674         int             type;
2675
2676         /*
2677          *      SHA256 is in all versions of OpenSSL, but isn't
2678          *      initialized by default.  It's needed for WiMAX
2679          *      certificates.
2680          */
2681 #ifdef HAVE_OPENSSL_EVP_SHA256
2682         EVP_add_digest(EVP_sha256());
2683 #endif
2684
2685         ctx = SSL_CTX_new(SSLv23_method()); /* which is really "all known SSL / TLS methods".  Idiots. */
2686         if (!ctx) {
2687                 tls_error_log(NULL, "Failed creating TLS context");
2688                 return NULL;
2689         }
2690
2691         /*
2692          * Save the config on the context so that callbacks which
2693          * only get SSL_CTX* e.g. session persistence, can get it
2694          */
2695         SSL_CTX_set_app_data(ctx, conf);
2696
2697         /*
2698          * Identify the type of certificates that needs to be loaded
2699          */
2700         if (conf->file_type) {
2701                 type = SSL_FILETYPE_PEM;
2702         } else {
2703                 type = SSL_FILETYPE_ASN1;
2704         }
2705
2706         /*
2707          * Set the password to load private key
2708          */
2709         if (conf->private_key_password) {
2710 #ifdef __APPLE__
2711                 /*
2712                  * We don't want to put the private key password in eap.conf, so  check
2713                  * for our special string which indicates we should get the password
2714                  * programmatically.
2715                  */
2716                 char const* special_string = "Apple:UseCertAdmin";
2717                 if (strncmp(conf->private_key_password, special_string, strlen(special_string)) == 0) {
2718                         char cmd[256];
2719                         char *password;
2720                         long const max_password_len = 128;
2721                         snprintf(cmd, sizeof(cmd) - 1, "/usr/sbin/certadmin --get-private-key-passphrase \"%s\"",
2722                                  conf->private_key_file);
2723
2724                         DEBUG2(LOG_PREFIX ":  Getting private key passphrase using command \"%s\"", cmd);
2725
2726                         FILE* cmd_pipe = popen(cmd, "r");
2727                         if (!cmd_pipe) {
2728                                 ERROR(LOG_PREFIX ": %s command failed: Unable to get private_key_password", cmd);
2729                                 ERROR(LOG_PREFIX ": Error reading private_key_file %s", conf->private_key_file);
2730                                 return NULL;
2731                         }
2732
2733                         rad_const_free(conf->private_key_password);
2734                         password = talloc_array(conf, char, max_password_len);
2735                         if (!password) {
2736                                 ERROR(LOG_PREFIX ": Can't allocate space for private_key_password");
2737                                 ERROR(LOG_PREFIX ": Error reading private_key_file %s", conf->private_key_file);
2738                                 pclose(cmd_pipe);
2739                                 return NULL;
2740                         }
2741
2742                         fgets(password, max_password_len, cmd_pipe);
2743                         pclose(cmd_pipe);
2744
2745                         /* Get rid of newline at end of password. */
2746                         password[strlen(password) - 1] = '\0';
2747
2748                         DEBUG3(LOG_PREFIX ": Password from command = \"%s\"", password);
2749                         conf->private_key_password = password;
2750                 }
2751 #endif
2752
2753                 {
2754                         char *password;
2755
2756                         memcpy(&password, &conf->private_key_password, sizeof(password));
2757                         SSL_CTX_set_default_passwd_cb_userdata(ctx, password);
2758                         SSL_CTX_set_default_passwd_cb(ctx, cbtls_password);
2759                 }
2760         }
2761
2762 #ifdef PSK_MAX_IDENTITY_LEN
2763         if (!client) {
2764                 /*
2765                  *      No dynamic query exists.  There MUST be a
2766                  *      statically configured identity and password.
2767                  */
2768                 if (conf->psk_query && !*conf->psk_query) {
2769                         ERROR(LOG_PREFIX ": Invalid PSK Configuration: psk_query cannot be empty");
2770                         return NULL;
2771                 }
2772
2773                 /*
2774                  *      Set the callback only if we can check things.
2775                  */
2776                 if (conf->psk_identity || conf->psk_query) {
2777                         SSL_CTX_set_psk_server_callback(ctx, psk_server_callback);
2778                 }
2779
2780         } else if (conf->psk_query) {
2781                 ERROR(LOG_PREFIX ": Invalid PSK Configuration: psk_query cannot be used for outgoing connections");
2782                 return NULL;
2783         }
2784
2785         /*
2786          *      Now check that if PSK is being used, the config is valid.
2787          */
2788         if ((conf->psk_identity && !conf->psk_password) ||
2789             (!conf->psk_identity && conf->psk_password) ||
2790             (conf->psk_identity && !*conf->psk_identity) ||
2791             (conf->psk_password && !*conf->psk_password)) {
2792                 ERROR(LOG_PREFIX ": Invalid PSK Configuration: psk_identity or psk_password are empty");
2793                 return NULL;
2794         }
2795
2796         if (conf->psk_identity) {
2797                 size_t psk_len, hex_len;
2798                 uint8_t buffer[PSK_MAX_PSK_LEN];
2799
2800                 if (conf->certificate_file ||
2801                     conf->private_key_password || conf->private_key_file ||
2802                     conf->ca_file || conf->ca_path) {
2803                         ERROR(LOG_PREFIX ": When PSKs are used, No certificate configuration is permitted");
2804                         return NULL;
2805                 }
2806
2807                 if (client) {
2808                         SSL_CTX_set_psk_client_callback(ctx,
2809                                                         psk_client_callback);
2810                 }
2811
2812                 psk_len = strlen(conf->psk_password);
2813                 if (strlen(conf->psk_password) > (2 * PSK_MAX_PSK_LEN)) {
2814                         ERROR(LOG_PREFIX ": psk_hexphrase is too long (max %d)", PSK_MAX_PSK_LEN);
2815                         return NULL;
2816                 }
2817
2818                 /*
2819                  *      Check the password now, so that we don't have
2820                  *      errors at run-time.
2821                  */
2822                 hex_len = fr_hex2bin(buffer, sizeof(buffer), conf->psk_password, psk_len);
2823                 if (psk_len != (2 * hex_len)) {
2824                         ERROR(LOG_PREFIX ": psk_hexphrase is not all hex");
2825                         return NULL;
2826                 }
2827
2828                 goto post_ca;
2829         }
2830 #else
2831         (void) client;  /* -Wunused */
2832 #endif
2833
2834         /*
2835          *      Load our keys and certificates
2836          *
2837          *      If certificates are of type PEM then we can make use
2838          *      of cert chain authentication using openssl api call
2839          *      SSL_CTX_use_certificate_chain_file.  Please see how
2840          *      the cert chain needs to be given in PEM from
2841          *      openSSL.org
2842          */
2843         if (!conf->certificate_file) goto load_ca;
2844
2845         if (type == SSL_FILETYPE_PEM) {
2846                 if (!(SSL_CTX_use_certificate_chain_file(ctx, conf->certificate_file))) {
2847                         tls_error_log(NULL, "Failed reading certificate file \"%s\"",
2848                                       conf->certificate_file);
2849                         return NULL;
2850                 }
2851
2852         } else if (!(SSL_CTX_use_certificate_file(ctx, conf->certificate_file, type))) {
2853                 tls_error_log(NULL, "Failed reading certificate file \"%s\"",
2854                               conf->certificate_file);
2855                 return NULL;
2856         }
2857
2858         /* Load the CAs we trust */
2859 load_ca:
2860         if (conf->ca_file || conf->ca_path) {
2861                 if (!SSL_CTX_load_verify_locations(ctx, conf->ca_file, conf->ca_path)) {
2862                         tls_error_log(NULL, "Failed reading Trusted root CA list \"%s\"",
2863                                       conf->ca_file);
2864                         return NULL;
2865                 }
2866         }
2867         if (conf->ca_file && *conf->ca_file) SSL_CTX_set_client_CA_list(ctx, SSL_load_client_CA_file(conf->ca_file));
2868
2869         if (conf->private_key_file) {
2870                 if (!(SSL_CTX_use_PrivateKey_file(ctx, conf->private_key_file, type))) {
2871                         tls_error_log(NULL, "Failed reading private key file \"%s\"",
2872                                       conf->private_key_file);
2873                         return NULL;
2874                 }
2875
2876                 /*
2877                  * Check if the loaded private key is the right one
2878                  */
2879                 if (!SSL_CTX_check_private_key(ctx)) {
2880                         ERROR(LOG_PREFIX ": Private key does not match the certificate public key");
2881                         return NULL;
2882                 }
2883         }
2884
2885 #ifdef PSK_MAX_IDENTITY_LEN
2886 post_ca:
2887 #endif
2888
2889         /*
2890          *      We never want SSLv2 or SSLv3.
2891          */
2892         ctx_options |= SSL_OP_NO_SSLv2;
2893         ctx_options |= SSL_OP_NO_SSLv3;
2894
2895         /*
2896          *      As of 3.0.5, we always allow TLSv1.1 and TLSv1.2.
2897          *      Though they can be *globally* disabled if necessary.x
2898          */
2899 #ifdef SSL_OP_NO_TLSv1
2900         if (conf->disable_tlsv1) ctx_options |= SSL_OP_NO_TLSv1;
2901
2902         ctx_tls_versions |= SSL_OP_NO_TLSv1;
2903 #endif
2904 #ifdef SSL_OP_NO_TLSv1_1
2905         if (conf->disable_tlsv1_1) ctx_options |= SSL_OP_NO_TLSv1_1;
2906
2907         ctx_tls_versions |= SSL_OP_NO_TLSv1_1;
2908 #endif
2909 #ifdef SSL_OP_NO_TLSv1_2
2910
2911         if (conf->disable_tlsv1_2) ctx_options |= SSL_OP_NO_TLSv1_2;
2912
2913         ctx_tls_versions |= SSL_OP_NO_TLSv1_2;
2914
2915 #endif
2916
2917         if ((ctx_options & ctx_tls_versions) == ctx_tls_versions) {
2918                 ERROR(LOG_PREFIX ": You have disabled all available TLS versions.  EAP will not work");
2919                 return NULL;
2920         }
2921
2922 #ifdef SSL_OP_NO_TICKET
2923         ctx_options |= SSL_OP_NO_TICKET;
2924 #endif
2925
2926         if (!conf->disable_single_dh_use) {
2927                 /*
2928                  *      SSL_OP_SINGLE_DH_USE must be used in order to prevent
2929                  *      small subgroup attacks and forward secrecy. Always
2930                  *      using SSL_OP_SINGLE_DH_USE has an impact on the
2931                  *      computer time needed during negotiation, but it is not
2932                  *      very large.
2933                  */
2934                 ctx_options |= SSL_OP_SINGLE_DH_USE;
2935         }
2936
2937         /*
2938          *      SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS to work around issues
2939          *      in Windows Vista client.
2940          *      http://www.openssl.org/~bodo/tls-cbc.txt
2941          *      http://www.nabble.com/(RADIATOR)-Radiator-Version-3.16-released-t2600070.html
2942          */
2943         ctx_options |= SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS;
2944
2945         if (conf->cipher_server_preference) {
2946                 /*
2947                  *      SSL_OP_CIPHER_SERVER_PREFERENCE to follow best practice
2948                  *      of nowday's TLS: do not allow poorly-selected ciphers from
2949                  *      client to take preference
2950                  */
2951                 ctx_options |= SSL_OP_CIPHER_SERVER_PREFERENCE;
2952         }
2953
2954         SSL_CTX_set_options(ctx, ctx_options);
2955
2956         /*
2957          *      TODO: Set the RSA & DH
2958          *      SSL_CTX_set_tmp_rsa_callback(ctx, cbtls_rsa);
2959          *      SSL_CTX_set_tmp_dh_callback(ctx, cbtls_dh);
2960          */
2961
2962         /*
2963          *      set the message callback to identify the type of
2964          *      message.  For every new session, there can be a
2965          *      different callback argument.
2966          *
2967          *      SSL_CTX_set_msg_callback(ctx, cbtls_msg);
2968          */
2969
2970         /*
2971          *      Set eliptical curve crypto configuration.
2972          */
2973 #if OPENSSL_VERSION_NUMBER >= 0x0090800fL
2974 #ifndef OPENSSL_NO_ECDH
2975         if (set_ecdh_curve(ctx, conf->ecdh_curve, conf->disable_single_dh_use) < 0) {
2976                 return NULL;
2977         }
2978 #endif
2979 #endif
2980
2981         /*
2982          *      OpenSSL will automatically create certificate chains,
2983          *      unless we tell it to not do that.  The problem is that
2984          *      it sometimes gets the chains right from a certificate
2985          *      signature view, but wrong from the clients view.
2986          */
2987         if (!conf->auto_chain) {
2988                 SSL_CTX_set_mode(ctx, SSL_MODE_NO_AUTO_CHAIN);
2989         }
2990
2991         /* Set Info callback */
2992         SSL_CTX_set_info_callback(ctx, cbtls_info);
2993
2994         /*
2995          *      Callbacks, etc. for session resumption.
2996          */
2997         if (conf->session_cache_enable) {
2998                 /*
2999                  *      Cache sessions on disk if requested.
3000                  */
3001                 if (conf->session_cache_path) {
3002                         SSL_CTX_sess_set_new_cb(ctx, cbtls_new_session);
3003                         SSL_CTX_sess_set_get_cb(ctx, cbtls_get_session);
3004                         SSL_CTX_sess_set_remove_cb(ctx, cbtls_remove_session);
3005                 }
3006
3007                 SSL_CTX_set_quiet_shutdown(ctx, 1);
3008                 if (fr_tls_ex_index_vps < 0)
3009                         fr_tls_ex_index_vps = SSL_SESSION_get_ex_new_index(0, NULL, NULL, NULL, sess_free_vps);
3010         }
3011
3012         /*
3013          *      Check the certificates for revocation.
3014          */
3015 #ifdef X509_V_FLAG_CRL_CHECK
3016         if (conf->check_crl) {
3017                 certstore = SSL_CTX_get_cert_store(ctx);
3018                 if (certstore == NULL) {
3019                         tls_error_log(NULL, "Error reading Certificate Store");
3020                         return NULL;
3021                 }
3022                 X509_STORE_set_flags(certstore, X509_V_FLAG_CRL_CHECK);
3023
3024 #ifdef X509_V_FLAG_CRL_CHECK_ALL
3025                 if (conf->check_all_crl)
3026                         X509_STORE_set_flags(certstore, X509_V_FLAG_CRL_CHECK_ALL);
3027 #endif
3028         }
3029 #endif
3030
3031         /*
3032          *      Set verify modes
3033          *      Always verify the peer certificate
3034          */
3035         verify_mode |= SSL_VERIFY_PEER;
3036         verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
3037         verify_mode |= SSL_VERIFY_CLIENT_ONCE;
3038         SSL_CTX_set_verify(ctx, verify_mode, cbtls_verify);
3039
3040         if (conf->verify_depth) {
3041                 SSL_CTX_set_verify_depth(ctx, conf->verify_depth);
3042         }
3043
3044         /* Load randomness */
3045         if (conf->random_file) {
3046                 if (!(RAND_load_file(conf->random_file, 1024*10))) {
3047                         tls_error_log(NULL, "Failed loading randomness");
3048                         return NULL;
3049                 }
3050         }
3051
3052         /*
3053          * Set the cipher list if we were told to
3054          */
3055         if (conf->cipher_list) {
3056                 if (!SSL_CTX_set_cipher_list(ctx, conf->cipher_list)) {
3057                         tls_error_log(NULL, "Failed setting cipher list");
3058                         return NULL;
3059                 }
3060         }
3061
3062         /*
3063          *      Setup session caching
3064          */
3065         if (conf->session_cache_enable) {
3066                 /*
3067                  *      Create a unique context Id per EAP-TLS configuration.
3068                  */
3069                 if (conf->session_id_name) {
3070                         snprintf(conf->session_context_id, sizeof(conf->session_context_id),
3071                                  "FR eap %s", conf->session_id_name);
3072                 } else {
3073                         snprintf(conf->session_context_id, sizeof(conf->session_context_id),
3074                                  "FR eap %p", conf);
3075                 }
3076
3077                 /*
3078                  *      Cache it, DON'T auto-clear it, and disable the internal OpenSSL session cache.
3079                  */
3080                 SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_SERVER | SSL_SESS_CACHE_NO_AUTO_CLEAR | SSL_SESS_CACHE_NO_INTERNAL);
3081
3082                 SSL_CTX_set_session_id_context(ctx,
3083                                                (unsigned char *) conf->session_context_id,
3084                                                (unsigned int) strlen(conf->session_context_id));
3085
3086                 /*
3087                  *      Our timeout is in hours, this is in seconds.
3088                  */
3089                 SSL_CTX_set_timeout(ctx, conf->session_timeout * 3600);
3090
3091                 /*
3092                  *      Set the maximum number of entries in the
3093                  *      session cache.
3094                  */
3095                 SSL_CTX_sess_set_cache_size(ctx, conf->session_cache_size);
3096
3097         } else {
3098                 SSL_CTX_set_session_cache_mode(ctx, SSL_SESS_CACHE_OFF);
3099         }
3100
3101         return ctx;
3102 }
3103
3104
3105 /*
3106  *      Free TLS client/server config
3107  *      Should not be called outside this code, as a callback is
3108  *      added to automatically free the data when the CONF_SECTION
3109  *      is freed.
3110  */
3111 static int _tls_server_conf_free(fr_tls_server_conf_t *conf)
3112 {
3113         if (conf->ctx) SSL_CTX_free(conf->ctx);
3114
3115 #ifdef HAVE_OPENSSL_OCSP_H
3116         if (conf->ocsp_store) X509_STORE_free(conf->ocsp_store);
3117         conf->ocsp_store = NULL;
3118 #endif
3119
3120 #ifndef NDEBUG
3121         memset(conf, 0, sizeof(*conf));
3122 #endif
3123         return 0;
3124 }
3125
3126 fr_tls_server_conf_t *tls_server_conf_alloc(TALLOC_CTX *ctx)
3127 {
3128         fr_tls_server_conf_t *conf;
3129
3130         conf = talloc_zero(ctx, fr_tls_server_conf_t);
3131         if (!conf) {
3132                 ERROR(LOG_PREFIX ": Out of memory");
3133                 return NULL;
3134         }
3135
3136         talloc_set_destructor(conf, _tls_server_conf_free);
3137
3138         return conf;
3139 }
3140
3141 fr_tls_server_conf_t *tls_server_conf_parse(CONF_SECTION *cs)
3142 {
3143         fr_tls_server_conf_t *conf;
3144
3145         /*
3146          *      If cs has already been parsed there should be a cached copy
3147          *      of conf already stored, so just return that.
3148          */
3149         conf = cf_data_find(cs, "tls-conf");
3150         if (conf) {
3151                 DEBUG(LOG_PREFIX ": Using cached TLS configuration from previous invocation");
3152                 return conf;
3153         }
3154
3155         conf = tls_server_conf_alloc(cs);
3156
3157         if (cf_section_parse(cs, conf, tls_server_config) < 0) {
3158         error:
3159                 talloc_free(conf);
3160                 return NULL;
3161         }
3162
3163         /*
3164          *      Save people from their own stupidity.
3165          */
3166         if (conf->fragment_size < 100) conf->fragment_size = 100;
3167
3168         /*
3169          *      Only check for certificate things if we don't have a
3170          *      PSK query.
3171          */
3172         if (conf->psk_identity) {
3173                 if (conf->private_key_file) {
3174                         WARN(LOG_PREFIX ": Ignoring private key file due to psk_identity being used");
3175                 }
3176
3177                 if (conf->certificate_file) {
3178                         WARN(LOG_PREFIX ": Ignoring certificate file due to psk_identity being used");
3179                 }
3180
3181         } else {
3182                 if (!conf->private_key_file) {
3183                         ERROR(LOG_PREFIX ": TLS Server requires a private key file");
3184                         goto error;
3185                 }
3186
3187                 if (!conf->certificate_file) {
3188                         ERROR(LOG_PREFIX ": TLS Server requires a certificate file");
3189                         goto error;
3190                 }
3191         }
3192
3193         /*
3194          *      Initialize TLS
3195          */
3196         conf->ctx = tls_init_ctx(conf, 0);
3197         if (conf->ctx == NULL) {
3198                 goto error;
3199         }
3200
3201 #ifdef HAVE_OPENSSL_OCSP_H
3202         /*
3203          *      Initialize OCSP Revocation Store
3204          */
3205         if (conf->ocsp_enable) {
3206                 conf->ocsp_store = init_revocation_store(conf);
3207                 if (conf->ocsp_store == NULL) goto error;
3208         }
3209 #endif /*HAVE_OPENSSL_OCSP_H*/
3210         {
3211                 char *dh_file;
3212
3213                 memcpy(&dh_file, &conf->dh_file, sizeof(dh_file));
3214                 if (load_dh_params(conf->ctx, dh_file) < 0) {
3215                         goto error;
3216                 }
3217         }
3218
3219         if (conf->verify_tmp_dir) {
3220                 if (chmod(conf->verify_tmp_dir, S_IRWXU) < 0) {
3221                         ERROR(LOG_PREFIX ": Failed changing permissions on %s: %s",
3222                               conf->verify_tmp_dir, fr_syserror(errno));
3223                         goto error;
3224                 }
3225         }
3226
3227         if (conf->verify_client_cert_cmd && !conf->verify_tmp_dir) {
3228                 ERROR(LOG_PREFIX ": You MUST set the verify directory in order to use verify_client_cmd");
3229                 goto error;
3230         }
3231
3232 #ifdef SSL_OP_NO_TLSv1_2
3233         /*
3234          *      OpenSSL 1.0.1f and 1.0.1g get the MS-MPPE keys wrong.
3235          */
3236 #if (OPENSSL_VERSION_NUMBER >= 0x10010060L) && (OPENSSL_VERSION_NUMBER < 0x10010060L)
3237         conf->disable_tlsv1_2 = true;
3238         WARN(LOG_PREFIX ": Disabling TLSv1.2 due to OpenSSL bugs");
3239 #endif
3240 #endif
3241
3242         /*
3243          *      Cache conf in cs in case we're asked to parse this again.
3244          */
3245         cf_data_add(cs, "tls-conf", conf, NULL);
3246
3247         return conf;
3248 }
3249
3250 fr_tls_server_conf_t *tls_client_conf_parse(CONF_SECTION *cs)
3251 {
3252         fr_tls_server_conf_t *conf;
3253
3254         conf = cf_data_find(cs, "tls-conf");
3255         if (conf) {
3256                 DEBUG2(LOG_PREFIX ": Using cached TLS configuration from previous invocation");
3257                 return conf;
3258         }
3259
3260         conf = tls_server_conf_alloc(cs);
3261
3262         if (cf_section_parse(cs, conf, tls_client_config) < 0) {
3263         error:
3264                 talloc_free(conf);
3265                 return NULL;
3266         }
3267
3268         /*
3269          *      Save people from their own stupidity.
3270          */
3271         if (conf->fragment_size < 100) conf->fragment_size = 100;
3272
3273         /*
3274          *      Initialize TLS
3275          */
3276         conf->ctx = tls_init_ctx(conf, 1);
3277         if (conf->ctx == NULL) {
3278                 goto error;
3279         }
3280
3281         {
3282                 char *dh_file;
3283
3284                 memcpy(&dh_file, &conf->dh_file, sizeof(dh_file));
3285                 if (load_dh_params(conf->ctx, dh_file) < 0) {
3286                         goto error;
3287                 }
3288         }
3289
3290         cf_data_add(cs, "tls-conf", conf, NULL);
3291
3292         return conf;
3293 }
3294
3295
3296 int tls_success(tls_session_t *ssn, REQUEST *request)
3297 {
3298         VALUE_PAIR *vp, *vps = NULL;
3299         fr_tls_server_conf_t *conf;
3300         TALLOC_CTX *talloc_ctx;
3301
3302         conf = (fr_tls_server_conf_t *)SSL_get_ex_data(ssn->ssl, FR_TLS_EX_INDEX_CONF);
3303         rad_assert(conf != NULL);
3304
3305         talloc_ctx = SSL_get_ex_data(ssn->ssl, FR_TLS_EX_INDEX_TALLOC);
3306
3307         /*
3308          *      If there's no session resumption, delete the entry
3309          *      from the cache.  This means either it's disabled
3310          *      globally for this SSL context, OR we were told to
3311          *      disable it for this user.
3312          *
3313          *      This also means you can't turn it on just for one
3314          *      user.
3315          */
3316         if ((!ssn->allow_session_resumption) ||
3317             (((vp = fr_pair_find_by_num(request->config, PW_ALLOW_SESSION_RESUMPTION, 0, TAG_ANY)) != NULL) &&
3318              (vp->vp_integer == 0))) {
3319                 SSL_CTX_remove_session(ssn->ctx,
3320                                        ssn->ssl_session);
3321                 ssn->allow_session_resumption = false;
3322
3323                 /*
3324                  *      If we're in a resumed session and it's
3325                  *      not allowed,
3326                  */
3327                 if (SSL_session_reused(ssn->ssl)) {
3328                         RDEBUG("Forcibly stopping session resumption as it is not allowed");
3329                         return -1;
3330                 }
3331
3332         /*
3333          *      Else resumption IS allowed, so we store the
3334          *      user data in the cache.
3335          */
3336         } else if (!SSL_session_reused(ssn->ssl)) {
3337                 VALUE_PAIR **certs;
3338                 char buffer[2 * MAX_SESSION_SIZE + 1];
3339
3340                 tls_session_id(ssn->ssl_session, buffer, MAX_SESSION_SIZE);
3341
3342                 vp = fr_pair_list_copy_by_num(talloc_ctx, request->reply->vps, PW_USER_NAME, 0, TAG_ANY);
3343                 if (vp) fr_pair_add(&vps, vp);
3344
3345                 vp = fr_pair_list_copy_by_num(talloc_ctx, request->packet->vps, PW_STRIPPED_USER_NAME, 0, TAG_ANY);
3346                 if (vp) fr_pair_add(&vps, vp);
3347
3348                 vp = fr_pair_list_copy_by_num(talloc_ctx, request->packet->vps, PW_STRIPPED_USER_DOMAIN, 0, TAG_ANY);
3349                 if (vp) fr_pair_add(&vps, vp);
3350
3351                 vp = fr_pair_list_copy_by_num(talloc_ctx, request->reply->vps, PW_CHARGEABLE_USER_IDENTITY, 0, TAG_ANY);
3352                 if (vp) fr_pair_add(&vps, vp);
3353
3354                 vp = fr_pair_list_copy_by_num(talloc_ctx, request->reply->vps, PW_CACHED_SESSION_POLICY, 0, TAG_ANY);
3355                 if (vp) fr_pair_add(&vps, vp);
3356
3357                 certs = (VALUE_PAIR **)SSL_get_ex_data(ssn->ssl, fr_tls_ex_index_certs);
3358
3359                 /*
3360                  *      Hmm... the certs should probably be session data.
3361                  */
3362                 if (certs) {
3363                         /*
3364                          *      @todo: some go into reply, others into
3365                          *      request
3366                          */
3367                         fr_pair_add(&vps, fr_pair_list_copy(talloc_ctx, *certs));
3368
3369                         /*
3370                          *      Save the certs in the packet, so that we can see them.
3371                          */
3372                         fr_pair_add(&request->packet->vps, fr_pair_list_copy(request->packet, *certs));
3373
3374                         vp = fr_pair_find_by_num(request->packet->vps, PW_TLS_CLIENT_CERT_EXPIRATION, 0, TAG_ANY);
3375                         if (vp) {
3376                                 time_t expires;
3377
3378                                 if (ocsp_asn1time_to_epoch(&expires, vp->vp_strvalue) < 0) {
3379                                         RDEBUG2("Failed getting certificate expiration, removing cache entry for session %s", buffer);
3380                                         SSL_CTX_remove_session(ssn->ctx, ssn->ssl_session);
3381                                         return -1;
3382                                 }
3383
3384                                 if (expires <= request->timestamp) {
3385                                         RDEBUG2("Certificate has expired, removing cache entry for session %s", buffer);
3386                                         SSL_CTX_remove_session(ssn->ctx, ssn->ssl_session);
3387                                         return -1;
3388                                 }
3389
3390                                 /*
3391                                  *      Account for Session-Timeout, if it's available.
3392                                  */
3393                                 vp = fr_pair_find_by_num(request->reply->vps, PW_SESSION_TIMEOUT, 0, TAG_ANY);
3394                                 if (vp) {
3395                                         if ((request->timestamp + vp->vp_integer) > expires) {
3396                                                 vp->vp_integer = expires - request->timestamp;
3397                                                 RWDEBUG2("Updating Session-Timeout to %u, due to impending certificate expiration",
3398                                                          vp->vp_integer);
3399                                         }
3400                                 }
3401                         }
3402                 }
3403
3404                 if (vps) {
3405                         SSL_SESSION_set_ex_data(ssn->ssl_session, fr_tls_ex_index_vps, vps);
3406                         rdebug_pair_list(L_DBG_LVL_2, request, vps, "  caching ");
3407
3408                         if (conf->session_cache_path) {
3409                                 /* write the VPs to the cache file */
3410                                 char filename[256], buf[1024];
3411                                 FILE *vp_file;
3412
3413                                 RDEBUG2("Saving session %s in the disk cache", buffer);
3414
3415                                 snprintf(filename, sizeof(filename), "%s%c%s.vps", conf->session_cache_path,
3416                                          FR_DIR_SEP, buffer);
3417                                 vp_file = fopen(filename, "w");
3418                                 if (vp_file == NULL) {
3419                                         RWDEBUG("Could not write session VPs to persistent cache: %s",
3420                                                 fr_syserror(errno));
3421                                 } else {
3422                                         VALUE_PAIR *prev = NULL;
3423                                         vp_cursor_t cursor;
3424                                         /* generate a dummy user-style entry which is easy to read back */
3425                                         fprintf(vp_file, "# SSL cached session\n");
3426                                         fprintf(vp_file, "%s\n\t", buffer);
3427
3428                                         for (vp = fr_cursor_init(&cursor, &vps);
3429                                              vp;
3430                                              vp = fr_cursor_next(&cursor)) {
3431                                                 /*
3432                                                  *      Terminate the previous line.
3433                                                  */
3434                                                 if (prev) fprintf(vp_file, ",\n\t");
3435
3436                                                 /*
3437                                                  *      Write this one.
3438                                                  */
3439                                                 vp_prints(buf, sizeof(buf), vp);
3440                                                 fputs(buf, vp_file);
3441                                                 prev = vp;
3442                                         }
3443
3444                                         /*
3445                                          *      Terminate the final line.
3446                                          */
3447                                         fprintf(vp_file, "\n");
3448                                         fclose(vp_file);
3449                                 }
3450                         } else {
3451                                 RDEBUG("Failed to find 'persist_dir' in TLS configuration.  Session will not be cached on disk.");
3452                         }
3453                 } else {
3454                         RDEBUG2("No information to cache: session caching will be disabled for session %s", buffer);
3455                         SSL_CTX_remove_session(ssn->ctx, ssn->ssl_session);
3456                 }
3457
3458         /*
3459          *      Else the session WAS allowed.  Copy the cached reply.
3460          */
3461         } else {
3462                 char buffer[2 * MAX_SESSION_SIZE + 1];
3463
3464                 tls_session_id(ssn->ssl_session, buffer, MAX_SESSION_SIZE);
3465
3466                 /*
3467                  *      The "restore VPs from OpenSSL cache" code is
3468                  *      now in eaptls_process()
3469                  */
3470
3471                 if (conf->session_cache_path) {
3472                         /* "touch" the cached session/vp file */
3473                         char filename[256];
3474
3475                         snprintf(filename, sizeof(filename), "%s%c%s.asn1",
3476                                  conf->session_cache_path, FR_DIR_SEP, buffer);
3477                         utime(filename, NULL);
3478                         snprintf(filename, sizeof(filename), "%s%c%s.vps",
3479                                  conf->session_cache_path, FR_DIR_SEP, buffer);
3480                         utime(filename, NULL);
3481                 }
3482
3483                 /*
3484                  *      Mark the request as resumed.
3485                  */
3486                 pair_make_request("EAP-Session-Resumed", "1", T_OP_SET);
3487         }
3488
3489         return 0;
3490 }
3491
3492
3493 void tls_fail(tls_session_t *ssn)
3494 {
3495         /*
3496          *      Force the session to NOT be cached.
3497          */
3498         SSL_CTX_remove_session(ssn->ctx, ssn->ssl_session);
3499 }
3500
3501 fr_tls_status_t tls_application_data(tls_session_t *ssn, REQUEST *request)
3502
3503 {
3504         int err;
3505         VALUE_PAIR **certs;
3506
3507         /*
3508          *      Decrypt the complete record.
3509          */
3510         err = BIO_write(ssn->into_ssl, ssn->dirty_in.data,
3511                         ssn->dirty_in.used);
3512         if (err != (int) ssn->dirty_in.used) {
3513                 record_init(&ssn->dirty_in);
3514                 RDEBUG("Failed writing %zd bytes to SSL BIO: %d", ssn->dirty_in.used, err);
3515                 return FR_TLS_FAIL;
3516         }
3517
3518         /*
3519          *      Clear the dirty buffer now that we are done with it
3520          *      and init the clean_out buffer to store decrypted data
3521          */
3522         record_init(&ssn->dirty_in);
3523         record_init(&ssn->clean_out);
3524
3525         /*
3526          *      Read (and decrypt) the tunneled data from the
3527          *      SSL session, and put it into the decrypted
3528          *      data buffer.
3529          */
3530         err = SSL_read(ssn->ssl, ssn->clean_out.data, sizeof(ssn->clean_out.data));
3531         if (err < 0) {
3532                 int code;
3533
3534                 RDEBUG("SSL_read Error");
3535
3536                 code = SSL_get_error(ssn->ssl, err);
3537                 switch (code) {
3538                 case SSL_ERROR_WANT_READ:
3539                         DEBUG("Error in fragmentation logic: SSL_WANT_READ");
3540                         return FR_TLS_MORE_FRAGMENTS;
3541
3542                 case SSL_ERROR_WANT_WRITE:
3543                         DEBUG("Error in fragmentation logic: SSL_WANT_WRITE");
3544                         break;
3545
3546                 default:
3547                         REDEBUG("Error in fragmentation logic");
3548                         tls_error_io_log(request, ssn, err,
3549                                          "Failed in " STRINGIFY(__FUNCTION__) " (SSL_read)");
3550                         break;
3551                 }
3552                 return FR_TLS_FAIL;
3553         }
3554
3555         if (err == 0) RWDEBUG("No data inside of the tunnel");
3556
3557         /*
3558          *      Passed all checks, successfully decrypted data
3559          */
3560         ssn->clean_out.used = err;
3561
3562         /*
3563          *      Add the certificates to intermediate packets, so that
3564          *      the inner tunnel policies can use them.
3565          */
3566         certs = (VALUE_PAIR **)SSL_get_ex_data(ssn->ssl, fr_tls_ex_index_certs);
3567
3568         if (certs) fr_pair_add(&request->packet->vps, fr_pair_list_copy(request->packet, *certs));
3569
3570         return FR_TLS_OK;
3571 }
3572
3573
3574 /*
3575  * Acknowledge received is for one of the following messages sent earlier
3576  * 1. Handshake completed Message, so now send, EAP-Success
3577  * 2. Alert Message, now send, EAP-Failure
3578  * 3. Fragment Message, now send, next Fragment
3579  */
3580 fr_tls_status_t tls_ack_handler(tls_session_t *ssn, REQUEST *request)
3581 {
3582         if (ssn == NULL){
3583                 REDEBUG("Unexpected ACK received:  No ongoing SSL session");
3584                 return FR_TLS_INVALID;
3585         }
3586         if (!ssn->info.initialized) {
3587                 RDEBUG("No SSL info available.  Waiting for more SSL data");
3588                 return FR_TLS_REQUEST;
3589         }
3590
3591         if ((ssn->info.content_type == handshake) && (ssn->info.origin == 0)) {
3592                 REDEBUG("Unexpected ACK received:  We sent no previous messages");
3593                 return FR_TLS_INVALID;
3594         }
3595
3596         switch (ssn->info.content_type) {
3597         case alert:
3598                 RDEBUG2("Peer ACKed our alert");
3599                 return FR_TLS_FAIL;
3600
3601         case handshake:
3602                 if ((ssn->info.handshake_type == handshake_finished) && (ssn->dirty_out.used == 0)) {
3603                         RDEBUG2("Peer ACKed our handshake fragment.  handshake is finished");
3604
3605                         /*
3606                          *      From now on all the content is
3607                          *      application data set it here as nobody else
3608                          *      sets it.
3609                          */
3610                         ssn->info.content_type = application_data;
3611                         return FR_TLS_SUCCESS;
3612                 } /* else more data to send */
3613
3614                 RDEBUG2("Peer ACKed our handshake fragment");
3615                 /* Fragmentation handler, send next fragment */
3616                 return FR_TLS_REQUEST;
3617
3618         case application_data:
3619                 RDEBUG2("Peer ACKed our application data fragment");
3620                 return FR_TLS_REQUEST;
3621
3622                 /*
3623                  *      For the rest of the conditions, switch over
3624                  *      to the default section below.
3625                  */
3626         default:
3627                 REDEBUG("Invalid ACK received: %d", ssn->info.content_type);
3628                 return FR_TLS_INVALID;
3629         }
3630 }
3631 #endif  /* WITH_TLS */
3632