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 "system/filesys.h"
  26 #include "lib/events/events.h"
  27 #include "lib/socket/socket.h"
  28 #include "lib/tls/tls.h"
  29 #include "param/param.h"
  30
  31 #if ENABLE_GNUTLS
  32 #include <gnutls/gnutls.h>
  33
  34 #define DH_BITS 1024
  35
  36 #if defined(HAVE_GNUTLS_DATUM) && !defined(HAVE_GNUTLS_DATUM_T)
  37 typedef gnutls_datum gnutls_datum_t;
  38 #endif
  39
  40 /* hold persistent tls data */
  41 struct tls_params {
  42         gnutls_certificate_credentials x509_cred;
  43         gnutls_dh_params dh_params;
  44         bool tls_enabled;
  45 };
  46 #endif
  47
  48 /* hold per connection tls data */
  49 struct tls_context {
  50         struct socket_context *socket;
  51         struct tevent_fd *fde;
  52         bool tls_enabled;
  53 #if ENABLE_GNUTLS
  54         gnutls_session session;
  55         bool done_handshake;
  56         bool have_first_byte;
  57         uint8_t first_byte;
  58         bool tls_detect;
  59         const char *plain_chars;
  60         bool output_pending;
  61         gnutls_certificate_credentials xcred;
  62         bool interrupted;
  63 #endif
  64 };
  65
  66 bool tls_enabled(struct socket_context *sock)
  67 {
  68         struct tls_context *tls;
  69         if (!sock) {
  70                 return false;
  71         }
  72         if (strcmp(sock->backend_name, "tls") != 0) {
  73                 return false;
  74         }
  75         tls = talloc_get_type(sock->private_data, struct tls_context);
  76         if (!tls) {
  77                 return false;
  78         }
  79         return tls->tls_enabled;
  80 }
  81
  82
  83 #if ENABLE_GNUTLS
  84
  85 static const struct socket_ops tls_socket_ops;
  86
  87 static NTSTATUS tls_socket_init(struct socket_context *sock)
  88 {
  89         switch (sock->type) {
  90         case SOCKET_TYPE_STREAM:
  91                 break;
  92         default:
  93                 return NT_STATUS_INVALID_PARAMETER;
  94         }
  95
  96         sock->backend_name = "tls";
  97
  98         return NT_STATUS_OK;
  99 }
 100
 101 #define TLSCHECK(call) do { \
 102         ret = call; \
 103         if (ret < 0) { \
 104                 DEBUG(0,("TLS %s - %s\n", #call, gnutls_strerror(ret))); \
 105                 goto failed; \
 106         } \
 107 } while (0)
 108
 109
 110 /*
 111   callback for reading from a socket
 112 */
 113 static ssize_t tls_pull(gnutls_transport_ptr ptr, void *buf, size_t size)
 114 {
 115         struct tls_context *tls = talloc_get_type(ptr, struct tls_context);
 116         NTSTATUS status;
 117         size_t nread;
 118
 119         if (tls->have_first_byte) {
 120                 *(uint8_t *)buf = tls->first_byte;
 121                 tls->have_first_byte = false;
 122                 return 1;
 123         }
 124
 125         status = socket_recv(tls->socket, buf, size, &nread);
 126         if (NT_STATUS_EQUAL(status, NT_STATUS_END_OF_FILE)) {
 127                 return 0;
 128         }
 129         if (NT_STATUS_IS_ERR(status)) {
 130                 TEVENT_FD_NOT_READABLE(tls->fde);
 131                 TEVENT_FD_NOT_WRITEABLE(tls->fde);
 132                 errno = EBADF;
 133                 return -1;
 134         }
 135         if (!NT_STATUS_IS_OK(status)) {
 136                 TEVENT_FD_READABLE(tls->fde);
 137                 errno = EAGAIN;
 138                 return -1;
 139         }
 140         if (tls->output_pending) {
 141                 TEVENT_FD_WRITEABLE(tls->fde);
 142         }
 143         if (size != nread) {
 144                 TEVENT_FD_READABLE(tls->fde);
 145         }
 146         return nread;
 147 }
 148
 149 /*
 150   callback for writing to a socket
 151 */
 152 static ssize_t tls_push(gnutls_transport_ptr ptr, const void *buf, size_t size)
 153 {
 154         struct tls_context *tls = talloc_get_type(ptr, struct tls_context);
 155         NTSTATUS status;
 156         size_t nwritten, total_nwritten = 0;
 157         DATA_BLOB b;
 158
 159         if (!tls->tls_enabled) {
 160                 return size;
 161         }
 162
 163         b.data = discard_const(buf);
 164         b.length = size;
 165
 166         /* Cope with socket_wrapper 1500 byte chunking for PCAP */
 167         do {
 168                 status = socket_send(tls->socket, &b, &nwritten);
 169
 170                 if (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
 171                         errno = EAGAIN;
 172                         return -1;
 173                 }
 174                 if (!NT_STATUS_IS_OK(status)) {
 175                         TEVENT_FD_WRITEABLE(tls->fde);
 176                         return -1;
 177                 }
 178
 179                 total_nwritten += nwritten;
 180
 181                 if (size == nwritten) {
 182                         break;
 183                 }
 184
 185                 b.data += nwritten;
 186                 b.length -= nwritten;
 187
 188                 TEVENT_FD_WRITEABLE(tls->fde);
 189         } while (b.length);
 190
 191         return total_nwritten;
 192 }
 193
 194 /*
 195   destroy a tls session
 196  */
 197 static int tls_destructor(struct tls_context *tls)
 198 {
 199         int ret;
 200         ret = gnutls_bye(tls->session, GNUTLS_SHUT_WR);
 201         if (ret < 0) {
 202                 DEBUG(4,("TLS gnutls_bye failed - %s\n", gnutls_strerror(ret)));
 203         }
 204         return 0;
 205 }
 206
 207
 208 /*
 209   possibly continue the handshake process
 210 */
 211 static NTSTATUS tls_handshake(struct tls_context *tls)
 212 {
 213         int ret;
 214
 215         if (tls->done_handshake) {
 216                 return NT_STATUS_OK;
 217         }
 218
 219         ret = gnutls_handshake(tls->session);
 220         if (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN) {
 221                 if (gnutls_record_get_direction(tls->session) == 1) {
 222                         TEVENT_FD_WRITEABLE(tls->fde);
 223                 }
 224                 return STATUS_MORE_ENTRIES;
 225         }
 226         if (ret < 0) {
 227                 DEBUG(0,("TLS gnutls_handshake failed - %s\n", gnutls_strerror(ret)));
 228                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 229         }
 230         tls->done_handshake = true;
 231         return NT_STATUS_OK;
 232 }
 233
 234 /*
 235   possibly continue an interrupted operation
 236 */
 237 static NTSTATUS tls_interrupted(struct tls_context *tls)
 238 {
 239         int ret;
 240
 241         if (!tls->interrupted) {
 242                 return NT_STATUS_OK;
 243         }
 244         if (gnutls_record_get_direction(tls->session) == 1) {
 245                 ret = gnutls_record_send(tls->session, NULL, 0);
 246         } else {
 247                 ret = gnutls_record_recv(tls->session, NULL, 0);
 248         }
 249         if (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN) {
 250                 return STATUS_MORE_ENTRIES;
 251         }
 252         tls->interrupted = false;
 253         return NT_STATUS_OK;
 254 }
 255
 256 /*
 257   see how many bytes are pending on the connection
 258 */
 259 static NTSTATUS tls_socket_pending(struct socket_context *sock, size_t *npending)
 260 {
 261         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 262         if (!tls->tls_enabled || tls->tls_detect) {
 263                 return socket_pending(tls->socket, npending);
 264         }
 265         *npending = gnutls_record_check_pending(tls->session);
 266         if (*npending == 0) {
 267                 NTSTATUS status = socket_pending(tls->socket, npending);
 268                 if (*npending == 0) {
 269                         /* seems to be a gnutls bug */
 270                         (*npending) = 100;
 271                 }
 272                 return status;
 273         }
 274         return NT_STATUS_OK;
 275 }
 276
 277 /*
 278   receive data either by tls or normal socket_recv
 279 */
 280 static NTSTATUS tls_socket_recv(struct socket_context *sock, void *buf,
 281                                 size_t wantlen, size_t *nread)
 282 {
 283         int ret;
 284         NTSTATUS status;
 285         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 286
 287         if (tls->tls_enabled && tls->tls_detect) {
 288                 status = socket_recv(tls->socket, &tls->first_byte, 1, nread);
 289                 NT_STATUS_NOT_OK_RETURN(status);
 290                 if (*nread == 0) return NT_STATUS_OK;
 291                 tls->tls_detect = false;
 292                 /* look for the first byte of a valid HTTP operation */
 293                 if (strchr(tls->plain_chars, tls->first_byte)) {
 294                         /* not a tls link */
 295                         tls->tls_enabled = false;
 296                         *(uint8_t *)buf = tls->first_byte;
 297                         return NT_STATUS_OK;
 298                 }
 299                 tls->have_first_byte = true;
 300         }
 301
 302         if (!tls->tls_enabled) {
 303                 return socket_recv(tls->socket, buf, wantlen, nread);
 304         }
 305
 306         status = tls_handshake(tls);
 307         NT_STATUS_NOT_OK_RETURN(status);
 308
 309         status = tls_interrupted(tls);
 310         NT_STATUS_NOT_OK_RETURN(status);
 311
 312         ret = gnutls_record_recv(tls->session, buf, wantlen);
 313         if (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN) {
 314                 if (gnutls_record_get_direction(tls->session) == 1) {
 315                         TEVENT_FD_WRITEABLE(tls->fde);
 316                 }
 317                 tls->interrupted = true;
 318                 return STATUS_MORE_ENTRIES;
 319         }
 320         if (ret < 0) {
 321                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 322         }
 323         *nread = ret;
 324         return NT_STATUS_OK;
 325 }
 326
 327
 328 /*
 329   send data either by tls or normal socket_recv
 330 */
 331 static NTSTATUS tls_socket_send(struct socket_context *sock,
 332                                 const DATA_BLOB *blob, size_t *sendlen)
 333 {
 334         NTSTATUS status;
 335         int ret;
 336         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 337
 338         if (!tls->tls_enabled) {
 339                 return socket_send(tls->socket, blob, sendlen);
 340         }
 341
 342         status = tls_handshake(tls);
 343         NT_STATUS_NOT_OK_RETURN(status);
 344
 345         status = tls_interrupted(tls);
 346         NT_STATUS_NOT_OK_RETURN(status);
 347
 348         ret = gnutls_record_send(tls->session, blob->data, blob->length);
 349         if (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN) {
 350                 if (gnutls_record_get_direction(tls->session) == 1) {
 351                         TEVENT_FD_WRITEABLE(tls->fde);
 352                 }
 353                 tls->interrupted = true;
 354                 return STATUS_MORE_ENTRIES;
 355         }
 356         if (ret < 0) {
 357                 DEBUG(0,("gnutls_record_send of %d failed - %s\n", (int)blob->length, gnutls_strerror(ret)));
 358                 return NT_STATUS_UNEXPECTED_NETWORK_ERROR;
 359         }
 360         *sendlen = ret;
 361         tls->output_pending = (ret < blob->length);
 362         return NT_STATUS_OK;
 363 }
 364
 365
 366 /*
 367   initialise global tls state
 368 */
 369 struct tls_params *tls_initialise(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
 370 {
 371         struct tls_params *params;
 372         int ret;
 373         struct stat st;
 374         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
 375         const char *keyfile = lpcfg_tls_keyfile(tmp_ctx, lp_ctx);
 376         const char *certfile = lpcfg_tls_certfile(tmp_ctx, lp_ctx);
 377         const char *cafile = lpcfg_tls_cafile(tmp_ctx, lp_ctx);
 378         const char *crlfile = lpcfg_tls_crlfile(tmp_ctx, lp_ctx);
 379         const char *dhpfile = lpcfg_tls_dhpfile(tmp_ctx, lp_ctx);
 380         void tls_cert_generate(TALLOC_CTX *, const char *, const char *, const char *, const char *);
 381         params = talloc(mem_ctx, struct tls_params);
 382         if (params == NULL) {
 383                 talloc_free(tmp_ctx);
 384                 return NULL;
 385         }
 386
 387         if (!lpcfg_tls_enabled(lp_ctx) || keyfile == NULL || *keyfile == 0) {
 388                 params->tls_enabled = false;
 389                 talloc_free(tmp_ctx);
 390                 return params;
 391         }
 392
 393         if (!file_exist(cafile)) {
 394                 char *hostname = talloc_asprintf(mem_ctx, "%s.%s",
 395                                                  lpcfg_netbios_name(lp_ctx),
 396                                                  lpcfg_dnsdomain(lp_ctx));
 397                 if (hostname == NULL) {
 398                         ret = GNUTLS_E_MEMORY_ERROR;
 399                         goto init_failed;
 400                 }
 401                 tls_cert_generate(params, hostname, keyfile, certfile, cafile);
 402                 talloc_free(hostname);
 403         }
 404
 405         if (file_exist(keyfile) &&
 406             !file_check_permissions(keyfile, geteuid(), 0600, &st))
 407         {
 408                 DEBUG(0, ("Invalid permissions on TLS private key file '%s':\n"
 409                           "owner uid %u should be %u, mode 0%o should be 0%o\n"
 410                           "This is known as CVE-2013-4476.\n"
 411                           "Removing all tls .pem files will cause an "
 412                           "auto-regeneration with the correct permissions.\n",
 413                           keyfile,
 414                           (unsigned int)st.st_uid, geteuid(),
 415                           (unsigned int)(st.st_mode & 0777), 0600));
 416                 talloc_free(tmp_ctx);
 417                 return NULL;
 418         }
 419
 420         ret = gnutls_global_init();
 421         if (ret < 0) goto init_failed;
 422
 423         gnutls_certificate_allocate_credentials(&params->x509_cred);
 424         if (ret < 0) goto init_failed;
 425
 426         if (cafile && *cafile) {
 427                 ret = gnutls_certificate_set_x509_trust_file(params->x509_cred, cafile,
 428                                                              GNUTLS_X509_FMT_PEM);
 429                 if (ret < 0) {
 430                         DEBUG(0,("TLS failed to initialise cafile %s\n", cafile));
 431                         goto init_failed;
 432                 }
 433         }
 434
 435         if (crlfile && *crlfile) {
 436                 ret = gnutls_certificate_set_x509_crl_file(params->x509_cred,
 437                                                            crlfile,
 438                                                            GNUTLS_X509_FMT_PEM);
 439                 if (ret < 0) {
 440                         DEBUG(0,("TLS failed to initialise crlfile %s\n", crlfile));
 441                         goto init_failed;
 442                 }
 443         }
 444
 445         ret = gnutls_certificate_set_x509_key_file(params->x509_cred,
 446                                                    certfile, keyfile,
 447                                                    GNUTLS_X509_FMT_PEM);
 448         if (ret < 0) {
 449                 DEBUG(0,("TLS failed to initialise certfile %s and keyfile %s\n",
 450                          certfile, keyfile));
 451                 goto init_failed;
 452         }
 453
 454         ret = gnutls_dh_params_init(&params->dh_params);
 455         if (ret < 0) goto init_failed;
 456
 457         if (dhpfile && *dhpfile) {
 458                 gnutls_datum_t dhparms;
 459                 size_t size;
 460                 dhparms.data = (uint8_t *)file_load(dhpfile, &size, 0, mem_ctx);
 461
 462                 if (!dhparms.data) {
 463                         DEBUG(0,("Failed to read DH Parms from %s\n", dhpfile));
 464                         goto init_failed;
 465                 }
 466                 dhparms.size = size;
 467
 468                 ret = gnutls_dh_params_import_pkcs3(params->dh_params, &dhparms, GNUTLS_X509_FMT_PEM);
 469                 if (ret < 0) goto init_failed;
 470         } else {
 471                 ret = gnutls_dh_params_generate2(params->dh_params, DH_BITS);
 472                 if (ret < 0) goto init_failed;
 473         }
 474
 475         gnutls_certificate_set_dh_params(params->x509_cred, params->dh_params);
 476
 477         params->tls_enabled = true;
 478
 479         talloc_free(tmp_ctx);
 480         return params;
 481
 482 init_failed:
 483         DEBUG(0,("GNUTLS failed to initialise - %s\n", gnutls_strerror(ret)));
 484         params->tls_enabled = false;
 485         talloc_free(tmp_ctx);
 486         return params;
 487 }
 488
 489
 490 /*
 491   setup for a new connection
 492 */
 493 struct socket_context *tls_init_server(struct tls_params *params,
 494                                        struct socket_context *socket_ctx,
 495                                        struct tevent_fd *fde,
 496                                        const char *plain_chars)
 497 {
 498         struct tls_context *tls;
 499         int ret;
 500         struct socket_context *new_sock;
 501         NTSTATUS nt_status;
 502
 503         nt_status = socket_create_with_ops(socket_ctx, &tls_socket_ops, &new_sock,
 504                                            SOCKET_TYPE_STREAM,
 505                                            socket_ctx->flags | SOCKET_FLAG_ENCRYPT);
 506         if (!NT_STATUS_IS_OK(nt_status)) {
 507                 return NULL;
 508         }
 509
 510         tls = talloc(new_sock, struct tls_context);
 511         if (tls == NULL) {
 512                 return NULL;
 513         }
 514
 515         tls->socket          = socket_ctx;
 516         talloc_steal(tls, socket_ctx);
 517         tls->fde             = fde;
 518
 519         new_sock->private_data    = tls;
 520
 521         if (!params->tls_enabled) {
 522                 talloc_free(new_sock);
 523                 return NULL;
 524         }
 525
 526         TLSCHECK(gnutls_init(&tls->session, GNUTLS_SERVER));
 527
 528         talloc_set_destructor(tls, tls_destructor);
 529
 530         TLSCHECK(gnutls_set_default_priority(tls->session));
 531         TLSCHECK(gnutls_credentials_set(tls->session, GNUTLS_CRD_CERTIFICATE,
 532                                         params->x509_cred));
 533         gnutls_certificate_server_set_request(tls->session, GNUTLS_CERT_REQUEST);
 534         gnutls_dh_set_prime_bits(tls->session, DH_BITS);
 535         gnutls_transport_set_ptr(tls->session, (gnutls_transport_ptr)tls);
 536         gnutls_transport_set_pull_function(tls->session, (gnutls_pull_func)tls_pull);
 537         gnutls_transport_set_push_function(tls->session, (gnutls_push_func)tls_push);
 538 #if GNUTLS_VERSION_MAJOR < 3
 539         gnutls_transport_set_lowat(tls->session, 0);
 540 #endif
 541
 542         tls->plain_chars = plain_chars;
 543         if (plain_chars) {
 544                 tls->tls_detect = true;
 545         } else {
 546                 tls->tls_detect = false;
 547         }
 548
 549         tls->output_pending  = false;
 550         tls->done_handshake  = false;
 551         tls->have_first_byte = false;
 552         tls->tls_enabled     = true;
 553         tls->interrupted     = false;
 554
 555         new_sock->state = SOCKET_STATE_SERVER_CONNECTED;
 556
 557         return new_sock;
 558
 559 failed:
 560         DEBUG(0,("TLS init connection failed - %s\n", gnutls_strerror(ret)));
 561         talloc_free(new_sock);
 562         return NULL;
 563 }
 564
 565
 566 /*
 567   setup for a new client connection
 568 */
 569 struct socket_context *tls_init_client(struct socket_context *socket_ctx,
 570                                        struct tevent_fd *fde,
 571                                        const char *ca_path)
 572 {
 573         struct tls_context *tls;
 574         int ret = 0;
 575         struct socket_context *new_sock;
 576         NTSTATUS nt_status;
 577
 578         nt_status = socket_create_with_ops(socket_ctx, &tls_socket_ops, &new_sock,
 579                                            SOCKET_TYPE_STREAM,
 580                                            socket_ctx->flags | SOCKET_FLAG_ENCRYPT);
 581         if (!NT_STATUS_IS_OK(nt_status)) {
 582                 return NULL;
 583         }
 584
 585         tls = talloc(new_sock, struct tls_context);
 586         if (tls == NULL) return NULL;
 587
 588         tls->socket          = socket_ctx;
 589         talloc_steal(tls, socket_ctx);
 590         tls->fde             = fde;
 591
 592         new_sock->private_data    = tls;
 593
 594         gnutls_global_init();
 595
 596         gnutls_certificate_allocate_credentials(&tls->xcred);
 597         gnutls_certificate_set_x509_trust_file(tls->xcred, ca_path, GNUTLS_X509_FMT_PEM);
 598         TLSCHECK(gnutls_init(&tls->session, GNUTLS_CLIENT));
 599         TLSCHECK(gnutls_set_default_priority(tls->session));
 600         gnutls_priority_set_direct(tls->session, "NORMAL:+CTYPE-OPENPGP", NULL);
 601         TLSCHECK(gnutls_credentials_set(tls->session, GNUTLS_CRD_CERTIFICATE, tls->xcred));
 602
 603         talloc_set_destructor(tls, tls_destructor);
 604
 605         gnutls_transport_set_ptr(tls->session, (gnutls_transport_ptr)tls);
 606         gnutls_transport_set_pull_function(tls->session, (gnutls_pull_func)tls_pull);
 607         gnutls_transport_set_push_function(tls->session, (gnutls_push_func)tls_push);
 608 #if GNUTLS_VERSION_MAJOR < 3
 609         gnutls_transport_set_lowat(tls->session, 0);
 610 #endif
 611         tls->tls_detect = false;
 612
 613         tls->output_pending  = false;
 614         tls->done_handshake  = false;
 615         tls->have_first_byte = false;
 616         tls->tls_enabled     = true;
 617         tls->interrupted     = false;
 618
 619         new_sock->state = SOCKET_STATE_CLIENT_CONNECTED;
 620
 621         return new_sock;
 622
 623 failed:
 624         DEBUG(0,("TLS init connection failed - %s\n", gnutls_strerror(ret)));
 625         tls->tls_enabled = false;
 626         return new_sock;
 627 }
 628
 629 static NTSTATUS tls_socket_set_option(struct socket_context *sock, const char *option, const char *val)
 630 {
 631         set_socket_options(socket_get_fd(sock), option);
 632         return NT_STATUS_OK;
 633 }
 634
 635 static char *tls_socket_get_peer_name(struct socket_context *sock, TALLOC_CTX *mem_ctx)
 636 {
 637         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 638         return socket_get_peer_name(tls->socket, mem_ctx);
 639 }
 640
 641 static struct socket_address *tls_socket_get_peer_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
 642 {
 643         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 644         return socket_get_peer_addr(tls->socket, mem_ctx);
 645 }
 646
 647 static struct socket_address *tls_socket_get_my_addr(struct socket_context *sock, TALLOC_CTX *mem_ctx)
 648 {
 649         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 650         return socket_get_my_addr(tls->socket, mem_ctx);
 651 }
 652
 653 static int tls_socket_get_fd(struct socket_context *sock)
 654 {
 655         struct tls_context *tls = talloc_get_type(sock->private_data, struct tls_context);
 656         return socket_get_fd(tls->socket);
 657 }
 658
 659 static const struct socket_ops tls_socket_ops = {
 660         .name                   = "tls",
 661         .fn_init                = tls_socket_init,
 662         .fn_recv                = tls_socket_recv,
 663         .fn_send                = tls_socket_send,
 664         .fn_pending             = tls_socket_pending,
 665
 666         .fn_set_option          = tls_socket_set_option,
 667
 668         .fn_get_peer_name       = tls_socket_get_peer_name,
 669         .fn_get_peer_addr       = tls_socket_get_peer_addr,
 670         .fn_get_my_addr         = tls_socket_get_my_addr,
 671         .fn_get_fd              = tls_socket_get_fd
 672 };
 673
 674 #else
 675
 676 /* for systems without tls we just fail the operations, and the caller
 677  * will retain the original socket */
 678
 679 struct tls_params *tls_initialise(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
 680 {
 681         return talloc_new(mem_ctx);
 682 }
 683
 684 /*
 685   setup for a new connection
 686 */
 687 struct socket_context *tls_init_server(struct tls_params *params,
 688                                     struct socket_context *socket,
 689                                     struct tevent_fd *fde,
 690                                     const char *plain_chars)
 691 {
 692         return NULL;
 693 }
 694
 695
 696 /*
 697   setup for a new client connection
 698 */
 699 struct socket_context *tls_init_client(struct socket_context *socket,
 700                                        struct tevent_fd *fde,
 701                                        const char *ca_path)
 702 {
 703         return NULL;
 704 }
 705
 706 #endif
 707