source4/lib/tls/tls.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    transport layer security handling code
   5
   6    Copyright (C) Andrew Tridgell 2004-2005
   7    Copyright (C) Stefan Metzmacher 2004
   8    Copyright (C) Andrew Bartlett 2006
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "lib/events/events.h"
  26 #include "lib/socket/socket.h"
  27 #include "lib/tls/tls.h"
  28 #include "param/param.h"
  29
  30 #if ENABLE_GNUTLS
  31 #include <gnutls/gnutls.h>
  32
  33 #define DH_BITS 1024
  34
  35 #if defined(HAVE_GNUTLS_DATUM) && !defined(HAVE_GNUTLS_DATUM_T)
  36 typedef gnutls_datum gnutls_datum_t;
  37 #endif
  38
  39 /* hold persistent tls data */
  40 struct tls_params {
  41         gnutls_certificate_credentials x509_cred;
  42         gnutls_dh_params dh_params;
  43         bool tls_enabled;
  44 };
  45 #endif
  46
  47 /* hold per connection tls data */
  48 struct tls_context {
  49         struct socket_context *socket;
  50         struct tevent_fd *fde;
  51         bool tls_enabled;
  52 #if ENABLE_GNUTLS
  53         gnutls_session session;
  54         bool done_handshake;
  55         bool have_first_byte;
  56         uint8_t first_byte;
  57         bool tls_detect;
  58         const char *plain_chars;
  59         bool output_pending;
  60         gnutls_certificate_credentials xcred;
  61         bool interrupted;
  62 #endif
  63 };
  64
  65 bool tls_enabled(struct socket_context *sock)
  66 {
  67         struct tls_context *tls;
  68         if (!sock) {
  69                 return false;
  70         }
  71         if (strcmp(sock->backend_name, "tls") != 0) {
  72                 return false;
  73         }
  74         tls = talloc_get_type(sock->private_data, struct tls_context);
  75         if (!tls) {
  76                 return false;
  77         }
  78         return tls->tls_enabled;
  79 }
  80
  81
  82 #if ENABLE_GNUTLS
  83
  84 static const struct socket_ops tls_socket_ops;
  85
  86 static NTSTATUS tls_socket_init(struct socket_context *sock)
  87 {
  88         switch (sock->type) {
  89         case SOCKET_TYPE_STREAM:
  90                 break;
  91         default:
  92                 return NT_STATUS_INVALID_PARAMETER;
  93         }
  94
  95         sock->backend_name = "tls";
  96
  97         return NT_STATUS_OK;
  98 }
  99
 100 #define TLSCHECK(call) do { \
 101         ret = call; \
 102         if (ret < 0) { \
 103                 DEBUG(0,("TLS %s - %s\n", #call, gnutls_strerror(ret))); \
 104                 goto failed; \
 105         } \
 106 } while (0)
 107
 108
 109 /*
 110   callback for reading from a socket
 111 */
 112 static ssize_t tls_pull(gnutls_transport_ptr ptr, void *buf, size_t size)
 113 {
 114         struct tls_context *tls = talloc_get_type(ptr, struct tls_context);
 115         NTSTATUS status;
 116         size_t nread;
 117
 118         if (tls->have_first_byte) {
 119                 *(uint8_t *)buf = tls->first_byte;
 120                 tls->have_first_byte = false;
 121                 return 1;
 122         }
 123
 124         status = socket_recv(tls->socket, buf, size, &nread);
 125         if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
 126                 return 0;
 127         }
 128         if (NT_STATUS_IS_ERR(status)) {
 129                 TEVENT_FD_NOT_READABLE(tls->fde);
 130                 TEVENT_FD_NOT_WRITEABLE(tls->fde);
 131                 errno = EBADF;
 132                 return -1;
 133         }
 134         if (!NT_STATUS_IS_OK(status)) {
 135                 TEVENT_FD_READABLE(tls->fde);
 136                 errno = EAGAIN;
 137                 return -1;
 138         }
 139         if (tls->output_pending) {
 140                 TEVENT_FD_WRITEABLE(tls->fde);
 141         }
 142         if (size != nread) {
 143                 TEVENT_FD_READABLE(tls->fde);
 144         }
 145         return nread;
 146 }
 147
 148 /*
 149   callback for writing to a socket
 150 */
 151 static ssize_t tls_push(gnutls_transport_ptr ptr, const void *buf, size_t size)
 152 {
 153         struct tls_context *tls = talloc_get_type(ptr, struct tls_context);
 154         NTSTATUS status;
 155         size_t nwritten, total_nwritten = 0;
 156         DATA_BLOB b;
 157
 158         if (!tls->tls_enabled) {
 159                 return size;
 160         }
 161
 162         b.data = discard_const(buf);
 163         b.length = size;
 164
 165         /* Cope with socket_wrapper 1500 byte chunking for PCAP */
 166         do {
 167                 status = socket_send(tls->socket, &b, &nwritten);
 168
 169                 if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
 170                         errno = EAGAIN;
 171                         return -1;
 172                 }
 173                 if (!NT_STATUS_IS_OK(status)) {
 174                         TEVENT_FD_WRITEABLE(tls->fde);
 175                         return -1;
 176                 }
 177
 178                 total_nwritten += nwritten;
 179
 180                 if (size == nwritten) {
 181                         break;
 182                 }
 183
 184                 b.data += nwritten;
 185                 b.length -= nwritten;
 186
 187                 TEVENT_FD_WRITEABLE(tls->fde);
 188         } while (b.length);
 189
 190         return total_nwritten;
 191 }
 192
 193 /*
 194   destroy a tls session
 195  */
 196 static int tls_destructor(struct tls_context *tls)
 197 {
 198         int ret;
 199         ret = gnutls_bye(tls->session, GNUTLS_SHUT_WR);
 200         if (ret < 0) {
 201                 DEBUG(4,("TLS gnutls_bye failed - %s\n", gnutls_strerror(ret)));
 202         }
 203         return 0;
 204 }
 205
 206
 207 /*
 208   possibly continue the handshake process
 209 */
 210 static NTSTATUS tls_handshake(struct tls_context *tls)
 211 {
 212         int ret;
 213
 214         if (tls->done_handshake) {
 215                 return NT_STATUS_OK;
 216         }
 217
 218         ret = gnutls_handshake(tls->session);
 219         if (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN) {
 220                 if (gnutls_record_get_direction(tls->session) == 1) {
 221                         TEVENT_FD_WRITEABLE(tls->fde);
 222                 }
 223                 return STATUS_MORE_ENTRIES;
 224         }
 225         if (ret < 0) {
 226                 DEBUG(0,("TLS gnutls_handshake failed - %s\n", gnutls_strerror(ret)));
 227                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 228         }
 229         tls->done_handshake = true;
 230         return NT_STATUS_OK;
 231 }
 232
 233 /*
 234   possibly continue an interrupted operation
 235 */
 236 static NTSTATUS tls_interrupted(struct tls_context *tls)
 237 {
 238         int ret;
 239
 240         if (!tls->interrupted) {
 241                 return NT_STATUS_OK;
 242         }
 243         if (gnutls_record_get_direction(tls->session) == 1) {
 244                 ret = gnutls_record_send(tls->session, NULL, 0);
 245         } else {
 246                 ret = gnutls_record_recv(tls->session, NULL, 0);
 247         }
 248         if (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN) {
 249                 return STATUS_MORE_ENTRIES;
 250         }
 251         tls->interrupted = false;
 252         return NT_STATUS_OK;
 253 }
 254
 255 /*
 256   see how many bytes are pending on the connection
 257 */
 258 static NTSTATUS tls_socket_pending(struct socket_context *sock, size_t *npending)
 259 {
 260         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 261         if (!tls->tls_enabled || tls->tls_detect) {
 262                 return socket_pending(tls->socket, npending);
 263         }
 264         *npending = gnutls_record_check_pending(tls->session);
 265         if (*npending == 0) {
 266                 NTSTATUS status = socket_pending(tls->socket, npending);
 267                 if (*npending == 0) {
 268                         /* seems to be a gnutls bug */
 269                         (*npending) = 100;
 270                 }
 271                 return status;
 272         }
 273         return NT_STATUS_OK;
 274 }
 275
 276 /*
 277   receive data either by tls or normal socket_recv
 278 */
 279 static NTSTATUS tls_socket_recv(struct socket_context *sock, void *buf,
 280                                 size_t wantlen, size_t *nread)
 281 {
 282         int ret;
 283         NTSTATUS status;
 284         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 285
 286         if (tls->tls_enabled && tls->tls_detect) {
 287                 status = socket_recv(tls->socket, &tls->first_byte, 1, nread);
 288                 NT_STATUS_NOT_OK_RETURN(status);
 289                 if (*nread == 0) return NT_STATUS_OK;
 290                 tls->tls_detect = false;
 291                 /* look for the first byte of a valid HTTP operation */
 292                 if (strchr(tls->plain_chars, tls->first_byte)) {
 293                         /* not a tls link */
 294                         tls->tls_enabled = false;
 295                         *(uint8_t *)buf = tls->first_byte;
 296                         return NT_STATUS_OK;
 297                 }
 298                 tls->have_first_byte = true;
 299         }
 300
 301         if (!tls->tls_enabled) {
 302                 return socket_recv(tls->socket, buf, wantlen, nread);
 303         }
 304
 305         status = tls_handshake(tls);
 306         NT_STATUS_NOT_OK_RETURN(status);
 307
 308         status = tls_interrupted(tls);
 309         NT_STATUS_NOT_OK_RETURN(status);
 310
 311         ret = gnutls_record_recv(tls->session, buf, wantlen);
 312         if (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN) {
 313                 if (gnutls_record_get_direction(tls->session) == 1) {
 314                         TEVENT_FD_WRITEABLE(tls->fde);
 315                 }
 316                 tls->interrupted = true;
 317                 return STATUS_MORE_ENTRIES;
 318         }
 319         if (ret < 0) {
 320                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 321         }
 322         *nread = ret;
 323         return NT_STATUS_OK;
 324 }
 325
 326
 327 /*
 328   send data either by tls or normal socket_recv
 329 */
 330 static NTSTATUS tls_socket_send(struct socket_context *sock,
 331                                 const DATA_BLOB *blob, size_t *sendlen)
 332 {
 333         NTSTATUS status;
 334         int ret;
 335         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 336
 337         if (!tls->tls_enabled) {
 338                 return socket_send(tls->socket, blob, sendlen);
 339         }
 340
 341         status = tls_handshake(tls);
 342         NT_STATUS_NOT_OK_RETURN(status);
 343
 344         status = tls_interrupted(tls);
 345         NT_STATUS_NOT_OK_RETURN(status);
 346
 347         ret = gnutls_record_send(tls->session, blob->data, blob->length);
 348         if (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN) {
 349                 if (gnutls_record_get_direction(tls->session) == 1) {
 350                         TEVENT_FD_WRITEABLE(tls->fde);
 351                 }
 352                 tls->interrupted = true;
 353                 return STATUS_MORE_ENTRIES;
 354         }
 355         if (ret < 0) {
 356                 DEBUG(0,("gnutls_record_send of %d failed - %s\n", (int)blob->length, gnutls_strerror(ret)));
 357                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 358         }
 359         *sendlen = ret;
 360         tls->output_pending = (ret < blob->length);
 361         return NT_STATUS_OK;
 362 }
 363
 364
 365 /*
 366   initialise global tls state
 367 */
 368 struct tls_params *tls_initialise(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
 369 {
 370         struct tls_params *params;
 371         int ret;
 372         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 373         const char *keyfile = lpcfg_tls_keyfile(tmp_ctx, lp_ctx);
 374         const char *certfile = lpcfg_tls_certfile(tmp_ctx, lp_ctx);
 375         const char *cafile = lpcfg_tls_cafile(tmp_ctx, lp_ctx);
 376         const char *crlfile = lpcfg_tls_crlfile(tmp_ctx, lp_ctx);
 377         const char *dhpfile = lpcfg_tls_dhpfile(tmp_ctx, lp_ctx);
 378         void tls_cert_generate(TALLOC_CTX *, const char *, const char *, const char *, const char *);
 379         params = talloc(mem_ctx, struct tls_params);
 380         if (params == NULL) {
 381                 talloc_free(tmp_ctx);
 382                 return NULL;
 383         }
 384
 385         if (!lpcfg_tls_enabled(lp_ctx) || keyfile == NULL || *keyfile == 0) {
 386                 params->tls_enabled = false;
 387                 talloc_free(tmp_ctx);
 388                 return params;
 389         }
 390
 391         if (!file_exist(cafile)) {
 392                 char *hostname = talloc_asprintf(mem_ctx, "%s.%s",
 393                                                  lpcfg_netbios_name(lp_ctx),
 394                                                  lpcfg_dnsdomain(lp_ctx));
 395                 if (hostname == NULL) {
 396                         goto init_failed;
 397                 }
 398                 tls_cert_generate(params, hostname, keyfile, certfile, cafile);
 399                 talloc_free(hostname);
 400         }
 401
 402         ret = gnutls_global_init();
 403         if (ret < 0) goto init_failed;
 404
 405         gnutls_certificate_allocate_credentials(&params->x509_cred);
 406         if (ret < 0) goto init_failed;
 407
 408         if (cafile && *cafile) {
 409                 ret = gnutls_certificate_set_x509_trust_file(params->x509_cred, cafile,
 410                                                              GNUTLS_X509_FMT_PEM);
 411                 if (ret < 0) {
 412                         DEBUG(0,("TLS failed to initialise cafile %s\n", cafile));
 413                         goto init_failed;
 414                 }
 415         }
 416
 417         if (crlfile && *crlfile) {
 418                 ret = gnutls_certificate_set_x509_crl_file(params->x509_cred,
 419                                                            crlfile,
 420                                                            GNUTLS_X509_FMT_PEM);
 421                 if (ret < 0) {
 422                         DEBUG(0,("TLS failed to initialise crlfile %s\n", crlfile));
 423                         goto init_failed;
 424                 }
 425         }
 426
 427         ret = gnutls_certificate_set_x509_key_file(params->x509_cred,
 428                                                    certfile, keyfile,
 429                                                    GNUTLS_X509_FMT_PEM);
 430         if (ret < 0) {
 431                 DEBUG(0,("TLS failed to initialise certfile %s and keyfile %s\n",
 432                          certfile, keyfile));
 433                 goto init_failed;
 434         }
 435
 436
 437         ret = gnutls_dh_params_init(&params->dh_params);
 438         if (ret < 0) goto init_failed;
 439
 440         if (dhpfile && *dhpfile) {
 441                 gnutls_datum_t dhparms;
 442                 size_t size;
 443                 dhparms.data = (uint8_t *)file_load(dhpfile, &size, 0, mem_ctx);
 444
 445                 if (!dhparms.data) {
 446                         DEBUG(0,("Failed to read DH Parms from %s\n", dhpfile));
 447                         goto init_failed;
 448                 }
 449                 dhparms.size = size;
 450
 451                 ret = gnutls_dh_params_import_pkcs3(params->dh_params, &dhparms, GNUTLS_X509_FMT_PEM);
 452                 if (ret < 0) goto init_failed;
 453         } else {
 454                 ret = gnutls_dh_params_generate2(params->dh_params, DH_BITS);
 455                 if (ret < 0) goto init_failed;
 456         }
 457
 458         gnutls_certificate_set_dh_params(params->x509_cred, params->dh_params);
 459
 460         params->tls_enabled = true;
 461
 462         talloc_free(tmp_ctx);
 463         return params;
 464
 465 init_failed:
 466         DEBUG(0,("GNUTLS failed to initialise - %s\n", gnutls_strerror(ret)));
 467         params->tls_enabled = false;
 468         talloc_free(tmp_ctx);
 469         return params;
 470 }
 471
 472
 473 /*
 474   setup for a new connection
 475 */
 476 struct socket_context *tls_init_server(struct tls_params *params,
 477                                        struct socket_context *socket_ctx,
 478                                        struct tevent_fd *fde,
 479                                        const char *plain_chars)
 480 {
 481         struct tls_context *tls;
 482         int ret;
 483         struct socket_context *new_sock;
 484         NTSTATUS nt_status;
 485
 486         nt_status = socket_create_with_ops(socket_ctx, &tls_socket_ops, &new_sock,
 487                                            SOCKET_TYPE_STREAM,
 488                                            socket_ctx->flags | SOCKET_FLAG_ENCRYPT);
 489         if (!NT_STATUS_IS_OK(nt_status)) {
 490                 return NULL;
 491         }
 492
 493         tls = talloc(new_sock, struct tls_context);
 494         if (tls == NULL) {
 495                 return NULL;
 496         }
 497
 498         tls->socket          = socket_ctx;
 499         talloc_steal(tls, socket_ctx);
 500         tls->fde             = fde;
 501
 502         new_sock->private_data    = tls;
 503
 504         if (!params->tls_enabled) {
 505                 talloc_free(new_sock);
 506                 return NULL;
 507         }
 508
 509         TLSCHECK(gnutls_init(&tls->session, GNUTLS_SERVER));
 510
 511         talloc_set_destructor(tls, tls_destructor);
 512
 513         TLSCHECK(gnutls_set_default_priority(tls->session));
 514         TLSCHECK(gnutls_credentials_set(tls->session, GNUTLS_CRD_CERTIFICATE,
 515                                         params->x509_cred));
 516         gnutls_certificate_server_set_request(tls->session, GNUTLS_CERT_REQUEST);
 517         gnutls_dh_set_prime_bits(tls->session, DH_BITS);
 518         gnutls_transport_set_ptr(tls->session, (gnutls_transport_ptr)tls);
 519         gnutls_transport_set_pull_function(tls->session, (gnutls_pull_func)tls_pull);
 520         gnutls_transport_set_push_function(tls->session, (gnutls_push_func)tls_push);
 521 #if GNUTLS_VERSION_MAJOR < 3
 522         gnutls_transport_set_lowat(tls->session, 0);
 523 #endif
 524
 525         tls->plain_chars = plain_chars;
 526         if (plain_chars) {
 527                 tls->tls_detect = true;
 528         } else {
 529                 tls->tls_detect = false;
 530         }
 531
 532         tls->output_pending  = false;
 533         tls->done_handshake  = false;
 534         tls->have_first_byte = false;
 535         tls->tls_enabled     = true;
 536         tls->interrupted     = false;
 537
 538         new_sock->state = SOCKET_STATE_SERVER_CONNECTED;
 539
 540         return new_sock;
 541
 542 failed:
 543         DEBUG(0,("TLS init connection failed - %s\n", gnutls_strerror(ret)));
 544         talloc_free(new_sock);
 545         return NULL;
 546 }
 547
 548
 549 /*
 550   setup for a new client connection
 551 */
 552 struct socket_context *tls_init_client(struct socket_context *socket_ctx,
 553                                        struct tevent_fd *fde,
 554                                        const char *ca_path)
 555 {
 556         struct tls_context *tls;
 557         int ret = 0;
 558         const int cert_type_priority[] = { GNUTLS_CRT_X509, GNUTLS_CRT_OPENPGP, 0 };
 559         struct socket_context *new_sock;
 560         NTSTATUS nt_status;
 561
 562         nt_status = socket_create_with_ops(socket_ctx, &tls_socket_ops, &new_sock,
 563                                            SOCKET_TYPE_STREAM,
 564                                            socket_ctx->flags | SOCKET_FLAG_ENCRYPT);
 565         if (!NT_STATUS_IS_OK(nt_status)) {
 566                 return NULL;
 567         }
 568
 569         tls = talloc(new_sock, struct tls_context);
 570         if (tls == NULL) return NULL;
 571
 572         tls->socket          = socket_ctx;
 573         talloc_steal(tls, socket_ctx);
 574         tls->fde             = fde;
 575
 576         new_sock->private_data    = tls;
 577
 578         gnutls_global_init();
 579
 580         gnutls_certificate_allocate_credentials(&tls->xcred);
 581         gnutls_certificate_set_x509_trust_file(tls->xcred, ca_path, GNUTLS_X509_FMT_PEM);
 582         TLSCHECK(gnutls_init(&tls->session, GNUTLS_CLIENT));
 583         TLSCHECK(gnutls_set_default_priority(tls->session));
 584         gnutls_certificate_type_set_priority(tls->session, cert_type_priority);
 585         TLSCHECK(gnutls_credentials_set(tls->session, GNUTLS_CRD_CERTIFICATE, tls->xcred));
 586
 587         talloc_set_destructor(tls, tls_destructor);
 588
 589         gnutls_transport_set_ptr(tls->session, (gnutls_transport_ptr)tls);
 590         gnutls_transport_set_pull_function(tls->session, (gnutls_pull_func)tls_pull);
 591         gnutls_transport_set_push_function(tls->session, (gnutls_push_func)tls_push);
 592 #if GNUTLS_VERSION_MAJOR < 3
 593         gnutls_transport_set_lowat(tls->session, 0);
 594 #endif
 595         tls->tls_detect = false;
 596
 597         tls->output_pending  = false;
 598         tls->done_handshake  = false;
 599         tls->have_first_byte = false;
 600         tls->tls_enabled     = true;
 601         tls->interrupted     = false;
 602
 603         new_sock->state = SOCKET_STATE_CLIENT_CONNECTED;
 604
 605         return new_sock;
 606
 607 failed:
 608         DEBUG(0,("TLS init connection failed - %s\n", gnutls_strerror(ret)));
 609         tls->tls_enabled = false;
 610         return new_sock;
 611 }
 612
 613 static NTSTATUS tls_socket_set_option(struct socket_context *sock, const char *option, const char *val)
 614 {
 615         set_socket_options(socket_get_fd(sock), option);
 616         return NT_STATUS_OK;
 617 }
 618
 619 static char *tls_socket_get_peer_name(struct socket_context *sock, TALLOC_CTX *mem_ctx)
 620 {
 621         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 622         return socket_get_peer_name(tls->socket, mem_ctx);
 623 }
 624
 625 static struct socket_address *tls_socket_get_peer_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
 626 {
 627         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 628         return socket_get_peer_addr(tls->socket, mem_ctx);
 629 }
 630
 631 static struct socket_address *tls_socket_get_my_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
 632 {
 633         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 634         return socket_get_my_addr(tls->socket, mem_ctx);
 635 }
 636
 637 static int tls_socket_get_fd(struct socket_context *sock)
 638 {
 639         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 640         return socket_get_fd(tls->socket);
 641 }
 642
 643 static const struct socket_ops tls_socket_ops = {
 644         .name                   = "tls",
 645         .fn_init                = tls_socket_init,
 646         .fn_recv                = tls_socket_recv,
 647         .fn_send                = tls_socket_send,
 648         .fn_pending             = tls_socket_pending,
 649
 650         .fn_set_option          = tls_socket_set_option,
 651
 652         .fn_get_peer_name       = tls_socket_get_peer_name,
 653         .fn_get_peer_addr       = tls_socket_get_peer_addr,
 654         .fn_get_my_addr         = tls_socket_get_my_addr,
 655         .fn_get_fd              = tls_socket_get_fd
 656 };
 657
 658 #else
 659
 660 /* for systems without tls we just fail the operations, and the caller
 661  * will retain the original socket */
 662
 663 struct tls_params *tls_initialise(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
 664 {
 665         return talloc_new(mem_ctx);
 666 }
 667
 668 /*
 669   setup for a new connection
 670 */
 671 struct socket_context *tls_init_server(struct tls_params *params,
 672                                     struct socket_context *socket,
 673                                     struct tevent_fd *fde,
 674                                     const char *plain_chars)
 675 {
 676         return NULL;
 677 }
 678
 679
 680 /*
 681   setup for a new client connection
 682 */
 683 struct socket_context *tls_init_client(struct socket_context *socket,
 684                                        struct tevent_fd *fde,
 685                                        const char *ca_path)
 686 {
 687         return NULL;
 688 }
 689
 690 #endif
 691