source3/libsmb/clifsinfo.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    FS info functions
   4    Copyright (C) Stefan (metze) Metzmacher      2003
   5    Copyright (C) Jeremy Allison 2007
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "libsmb/libsmb.h"
  23 #include "../libcli/auth/spnego.h"
  24 #include "../libcli/auth/ntlmssp.h"
  25 #include "../lib/util/tevent_ntstatus.h"
  26 #include "async_smb.h"
  27 #include "smb_crypt.h"
  28 #include "trans2.h"
  29
  30 /****************************************************************************
  31  Get UNIX extensions version info.
  32 ****************************************************************************/
  33
  34 struct cli_unix_extensions_version_state {
  35         struct cli_state *cli;
  36         uint16_t setup[1];
  37         uint8_t param[2];
  38         uint16_t major, minor;
  39         uint32_t caplow, caphigh;
  40 };
  41
  42 static void cli_unix_extensions_version_done(struct tevent_req *subreq);
  43
  44 struct tevent_req *cli_unix_extensions_version_send(TALLOC_CTX *mem_ctx,
  45                                                     struct tevent_context *ev,
  46                                                     struct cli_state *cli)
  47 {
  48         struct tevent_req *req, *subreq;
  49         struct cli_unix_extensions_version_state *state;
  50
  51         req = tevent_req_create(mem_ctx, &state,
  52                                 struct cli_unix_extensions_version_state);
  53         if (req == NULL) {
  54                 return NULL;
  55         }
  56         state->cli = cli;
  57         SSVAL(state->setup, 0, TRANSACT2_QFSINFO);
  58         SSVAL(state->param, 0, SMB_QUERY_CIFS_UNIX_INFO);
  59
  60         subreq = cli_trans_send(state, ev, cli, SMBtrans2,
  61                                 NULL, 0, 0, 0,
  62                                 state->setup, 1, 0,
  63                                 state->param, 2, 0,
  64                                 NULL, 0, 560);
  65         if (tevent_req_nomem(subreq, req)) {
  66                 return tevent_req_post(req, ev);
  67         }
  68         tevent_req_set_callback(subreq, cli_unix_extensions_version_done, req);
  69         return req;
  70 }
  71
  72 static void cli_unix_extensions_version_done(struct tevent_req *subreq)
  73 {
  74         struct tevent_req *req = tevent_req_callback_data(
  75                 subreq, struct tevent_req);
  76         struct cli_unix_extensions_version_state *state = tevent_req_data(
  77                 req, struct cli_unix_extensions_version_state);
  78         uint8_t *data;
  79         uint32_t num_data;
  80         NTSTATUS status;
  81
  82         status = cli_trans_recv(subreq, state, NULL, NULL, 0, NULL,
  83                                 NULL, 0, NULL, &data, 12, &num_data);
  84         TALLOC_FREE(subreq);
  85         if (!NT_STATUS_IS_OK(status)) {
  86                 tevent_req_nterror(req, status);
  87                 return;
  88         }
  89
  90         state->major = SVAL(data, 0);
  91         state->minor = SVAL(data, 2);
  92         state->caplow = IVAL(data, 4);
  93         state->caphigh = IVAL(data, 8);
  94         TALLOC_FREE(data);
  95         tevent_req_done(req);
  96 }
  97
  98 NTSTATUS cli_unix_extensions_version_recv(struct tevent_req *req,
  99                                           uint16_t *pmajor, uint16_t *pminor,
 100                                           uint32_t *pcaplow,
 101                                           uint32_t *pcaphigh)
 102 {
 103         struct cli_unix_extensions_version_state *state = tevent_req_data(
 104                 req, struct cli_unix_extensions_version_state);
 105         NTSTATUS status;
 106
 107         if (tevent_req_is_nterror(req, &status)) {
 108                 return status;
 109         }
 110         *pmajor = state->major;
 111         *pminor = state->minor;
 112         *pcaplow = state->caplow;
 113         *pcaphigh = state->caphigh;
 114         state->cli->server_posix_capabilities = *pcaplow;
 115         return NT_STATUS_OK;
 116 }
 117
 118 NTSTATUS cli_unix_extensions_version(struct cli_state *cli, uint16 *pmajor,
 119                                      uint16 *pminor, uint32 *pcaplow,
 120                                      uint32 *pcaphigh)
 121 {
 122         TALLOC_CTX *frame = talloc_stackframe();
 123         struct event_context *ev;
 124         struct tevent_req *req;
 125         NTSTATUS status = NT_STATUS_OK;
 126
 127         if (cli_has_async_calls(cli)) {
 128                 /*
 129                  * Can't use sync call while an async call is in flight
 130                  */
 131                 status = NT_STATUS_INVALID_PARAMETER;
 132                 goto fail;
 133         }
 134
 135         ev = event_context_init(frame);
 136         if (ev == NULL) {
 137                 status = NT_STATUS_NO_MEMORY;
 138                 goto fail;
 139         }
 140
 141         req = cli_unix_extensions_version_send(frame, ev, cli);
 142         if (req == NULL) {
 143                 status = NT_STATUS_NO_MEMORY;
 144                 goto fail;
 145         }
 146
 147         if (!tevent_req_poll(req, ev)) {
 148                 status = map_nt_error_from_unix(errno);
 149                 goto fail;
 150         }
 151
 152         status = cli_unix_extensions_version_recv(req, pmajor, pminor, pcaplow,
 153                                                   pcaphigh);
 154  fail:
 155         TALLOC_FREE(frame);
 156         return status;
 157 }
 158
 159 /****************************************************************************
 160  Set UNIX extensions capabilities.
 161 ****************************************************************************/
 162
 163 struct cli_set_unix_extensions_capabilities_state {
 164         struct cli_state *cli;
 165         uint16_t setup[1];
 166         uint8_t param[4];
 167         uint8_t data[12];
 168 };
 169
 170 static void cli_set_unix_extensions_capabilities_done(
 171         struct tevent_req *subreq);
 172
 173 struct tevent_req *cli_set_unix_extensions_capabilities_send(
 174         TALLOC_CTX *mem_ctx, struct tevent_context *ev, struct cli_state *cli,
 175         uint16_t major, uint16_t minor, uint32_t caplow, uint32_t caphigh)
 176 {
 177         struct tevent_req *req, *subreq;
 178         struct cli_set_unix_extensions_capabilities_state *state;
 179
 180         req = tevent_req_create(
 181                 mem_ctx, &state,
 182                 struct cli_set_unix_extensions_capabilities_state);
 183         if (req == NULL) {
 184                 return NULL;
 185         }
 186
 187         state->cli = cli;
 188         SSVAL(state->setup+0, 0, TRANSACT2_SETFSINFO);
 189
 190         SSVAL(state->param, 0, 0);
 191         SSVAL(state->param, 2, SMB_SET_CIFS_UNIX_INFO);
 192
 193         SSVAL(state->data, 0, major);
 194         SSVAL(state->data, 2, minor);
 195         SIVAL(state->data, 4, caplow);
 196         SIVAL(state->data, 8, caphigh);
 197
 198         subreq = cli_trans_send(state, ev, cli, SMBtrans2,
 199                                 NULL, 0, 0, 0,
 200                                 state->setup, 1, 0,
 201                                 state->param, 4, 0,
 202                                 state->data, 12, 560);
 203         if (tevent_req_nomem(subreq, req)) {
 204                 return tevent_req_post(req, ev);
 205         }
 206         tevent_req_set_callback(
 207                 subreq, cli_set_unix_extensions_capabilities_done, req);
 208         return req;
 209 }
 210
 211 static void cli_set_unix_extensions_capabilities_done(
 212         struct tevent_req *subreq)
 213 {
 214         struct tevent_req *req = tevent_req_callback_data(
 215                 subreq, struct tevent_req);
 216         struct cli_set_unix_extensions_capabilities_state *state = tevent_req_data(
 217                 req, struct cli_set_unix_extensions_capabilities_state);
 218
 219         NTSTATUS status = cli_trans_recv(subreq, NULL, NULL, NULL, 0, NULL,
 220                                          NULL, 0, NULL, NULL, 0, NULL);
 221         if (NT_STATUS_IS_OK(status)) {
 222                 state->cli->requested_posix_capabilities = IVAL(state->data, 4);
 223         }
 224         tevent_req_simple_finish_ntstatus(subreq, status);
 225 }
 226
 227 NTSTATUS cli_set_unix_extensions_capabilities_recv(struct tevent_req *req)
 228 {
 229         return tevent_req_simple_recv_ntstatus(req);
 230 }
 231
 232 NTSTATUS cli_set_unix_extensions_capabilities(struct cli_state *cli,
 233                                               uint16 major, uint16 minor,
 234                                               uint32 caplow, uint32 caphigh)
 235 {
 236         struct tevent_context *ev;
 237         struct tevent_req *req;
 238         NTSTATUS status = NT_STATUS_NO_MEMORY;
 239
 240         if (cli_has_async_calls(cli)) {
 241                 return NT_STATUS_INVALID_PARAMETER;
 242         }
 243         ev = tevent_context_init(talloc_tos());
 244         if (ev == NULL) {
 245                 goto fail;
 246         }
 247         req = cli_set_unix_extensions_capabilities_send(
 248                 ev, ev, cli, major, minor, caplow, caphigh);
 249         if (req == NULL) {
 250                 goto fail;
 251         }
 252         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 253                 goto fail;
 254         }
 255         status = cli_set_unix_extensions_capabilities_recv(req);
 256 fail:
 257         TALLOC_FREE(ev);
 258         return status;
 259 }
 260
 261 struct cli_get_fs_attr_info_state {
 262         uint16_t setup[1];
 263         uint8_t param[2];
 264         uint32_t fs_attr;
 265 };
 266
 267 static void cli_get_fs_attr_info_done(struct tevent_req *subreq);
 268
 269 struct tevent_req *cli_get_fs_attr_info_send(TALLOC_CTX *mem_ctx,
 270                                              struct tevent_context *ev,
 271                                              struct cli_state *cli)
 272 {
 273         struct tevent_req *subreq, *req;
 274         struct cli_get_fs_attr_info_state *state;
 275
 276         req = tevent_req_create(mem_ctx, &state,
 277                                 struct cli_get_fs_attr_info_state);
 278         if (req == NULL) {
 279                 return NULL;
 280         }
 281         SSVAL(state->setup+0, 0, TRANSACT2_QFSINFO);
 282         SSVAL(state->param+0, 0, SMB_QUERY_FS_ATTRIBUTE_INFO);
 283
 284         subreq = cli_trans_send(state, ev, cli, SMBtrans2,
 285                                 NULL, 0, 0, 0,
 286                                 state->setup, 1, 0,
 287                                 state->param, 2, 0,
 288                                 NULL, 0, 560);
 289         if (tevent_req_nomem(subreq, req)) {
 290                 return tevent_req_post(req, ev);
 291         }
 292         tevent_req_set_callback(subreq, cli_get_fs_attr_info_done, req);
 293         return req;
 294 }
 295
 296 static void cli_get_fs_attr_info_done(struct tevent_req *subreq)
 297 {
 298         struct tevent_req *req = tevent_req_callback_data(
 299                 subreq, struct tevent_req);
 300         struct cli_get_fs_attr_info_state *state = tevent_req_data(
 301                 req, struct cli_get_fs_attr_info_state);
 302         uint8_t *data;
 303         uint32_t num_data;
 304         NTSTATUS status;
 305
 306         status = cli_trans_recv(subreq, talloc_tos(), NULL, NULL, 0, NULL,
 307                                 NULL, 0, NULL, &data, 12, &num_data);
 308         TALLOC_FREE(subreq);
 309         if (!NT_STATUS_IS_OK(status)) {
 310                 tevent_req_nterror(req, status);
 311                 return;
 312         }
 313         state->fs_attr = IVAL(data, 0);
 314         TALLOC_FREE(data);
 315         tevent_req_done(req);
 316 }
 317
 318 NTSTATUS cli_get_fs_attr_info_recv(struct tevent_req *req, uint32_t *fs_attr)
 319 {
 320         struct cli_get_fs_attr_info_state *state = tevent_req_data(
 321                 req, struct cli_get_fs_attr_info_state);
 322         NTSTATUS status;
 323
 324         if (tevent_req_is_nterror(req, &status)) {
 325                 return status;
 326         }
 327         *fs_attr = state->fs_attr;
 328         return NT_STATUS_OK;
 329 }
 330
 331 NTSTATUS cli_get_fs_attr_info(struct cli_state *cli, uint32_t *fs_attr)
 332 {
 333         struct tevent_context *ev;
 334         struct tevent_req *req;
 335         NTSTATUS status = NT_STATUS_NO_MEMORY;
 336
 337         if (cli_has_async_calls(cli)) {
 338                 return NT_STATUS_INVALID_PARAMETER;
 339         }
 340         ev = tevent_context_init(talloc_tos());
 341         if (ev == NULL) {
 342                 goto fail;
 343         }
 344         req = cli_get_fs_attr_info_send(ev, ev, cli);
 345         if (req == NULL) {
 346                 goto fail;
 347         }
 348         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 349                 goto fail;
 350         }
 351         status = cli_get_fs_attr_info_recv(req, fs_attr);
 352 fail:
 353         TALLOC_FREE(ev);
 354         return status;
 355 }
 356
 357 NTSTATUS cli_get_fs_volume_info(struct cli_state *cli, fstring volume_name,
 358                                 uint32 *pserial_number, time_t *pdate)
 359 {
 360         NTSTATUS status;
 361         uint16 setup[1];
 362         uint8_t param[2];
 363         uint8_t *rdata;
 364         uint32_t rdata_count;
 365         unsigned int nlen;
 366
 367         SSVAL(setup, 0, TRANSACT2_QFSINFO);
 368         SSVAL(param,0,SMB_QUERY_FS_VOLUME_INFO);
 369
 370         status = cli_trans(talloc_tos(), cli, SMBtrans2,
 371                            NULL, 0, 0, 0,
 372                            setup, 1, 0,
 373                            param, 2, 0,
 374                            NULL, 0, 560,
 375                            NULL,
 376                            NULL, 0, NULL,
 377                            NULL, 0, NULL,
 378                            &rdata, 10, &rdata_count);
 379         if (!NT_STATUS_IS_OK(status)) {
 380                 return status;
 381         }
 382
 383         if (pdate) {
 384                 struct timespec ts;
 385                 ts = interpret_long_date((char *)rdata);
 386                 *pdate = ts.tv_sec;
 387         }
 388         if (pserial_number) {
 389                 *pserial_number = IVAL(rdata,8);
 390         }
 391         nlen = IVAL(rdata,12);
 392         clistr_pull(cli->inbuf, volume_name, rdata + 18, sizeof(fstring),
 393                     nlen, STR_UNICODE);
 394
 395         /* todo: but not yet needed
 396          *       return the other stuff
 397          */
 398
 399         TALLOC_FREE(rdata);
 400         return NT_STATUS_OK;
 401 }
 402
 403 NTSTATUS cli_get_fs_full_size_info(struct cli_state *cli,
 404                                    uint64_t *total_allocation_units,
 405                                    uint64_t *caller_allocation_units,
 406                                    uint64_t *actual_allocation_units,
 407                                    uint64_t *sectors_per_allocation_unit,
 408                                    uint64_t *bytes_per_sector)
 409 {
 410         uint16 setup[1];
 411         uint8_t param[2];
 412         uint8_t *rdata = NULL;
 413         uint32_t rdata_count;
 414         NTSTATUS status;
 415
 416         SSVAL(setup, 0, TRANSACT2_QFSINFO);
 417         SSVAL(param, 0, SMB_FS_FULL_SIZE_INFORMATION);
 418
 419         status = cli_trans(talloc_tos(), cli, SMBtrans2,
 420                            NULL, 0, 0, 0,
 421                            setup, 1, 0, /* setup */
 422                            param, 2, 0,  /* param */
 423                            NULL, 0, 560, /* data */
 424                            NULL,
 425                            NULL, 0, NULL, /* rsetup */
 426                            NULL, 0, NULL, /* rparam */
 427                            &rdata, 32, &rdata_count);  /* rdata */
 428         if (!NT_STATUS_IS_OK(status)) {
 429                 goto fail;
 430         }
 431
 432         if (total_allocation_units) {
 433                 *total_allocation_units = BIG_UINT(rdata, 0);
 434         }
 435         if (caller_allocation_units) {
 436                 *caller_allocation_units = BIG_UINT(rdata,8);
 437         }
 438         if (actual_allocation_units) {
 439                 *actual_allocation_units = BIG_UINT(rdata,16);
 440         }
 441         if (sectors_per_allocation_unit) {
 442                 *sectors_per_allocation_unit = IVAL(rdata,24);
 443         }
 444         if (bytes_per_sector) {
 445                 *bytes_per_sector = IVAL(rdata,28);
 446         }
 447
 448 fail:
 449         TALLOC_FREE(rdata);
 450         return status;
 451 }
 452
 453 NTSTATUS cli_get_posix_fs_info(struct cli_state *cli,
 454                                uint32 *optimal_transfer_size,
 455                                uint32 *block_size,
 456                                uint64_t *total_blocks,
 457                                uint64_t *blocks_available,
 458                                uint64_t *user_blocks_available,
 459                                uint64_t *total_file_nodes,
 460                                uint64_t *free_file_nodes,
 461                                uint64_t *fs_identifier)
 462 {
 463         uint16 setup[1];
 464         uint8_t param[2];
 465         uint8_t *rdata = NULL;
 466         NTSTATUS status;
 467
 468         SSVAL(setup, 0, TRANSACT2_QFSINFO);
 469         SSVAL(param,0,SMB_QUERY_POSIX_FS_INFO);
 470
 471         status = cli_trans(talloc_tos(), cli, SMBtrans2, NULL, 0, 0, 0,
 472                            setup, 1, 0,
 473                            param, 2, 0,
 474                            NULL, 0, 560,
 475                            NULL,
 476                            NULL, 0, NULL, /* rsetup */
 477                            NULL, 0, NULL, /* rparam */
 478                            &rdata, 56, NULL);
 479         if (!NT_STATUS_IS_OK(status)) {
 480                 return status;
 481         }
 482
 483         if (optimal_transfer_size) {
 484                 *optimal_transfer_size = IVAL(rdata, 0);
 485         }
 486         if (block_size) {
 487                 *block_size = IVAL(rdata,4);
 488         }
 489         if (total_blocks) {
 490                 *total_blocks = BIG_UINT(rdata,8);
 491         }
 492         if (blocks_available) {
 493                 *blocks_available = BIG_UINT(rdata,16);
 494         }
 495         if (user_blocks_available) {
 496                 *user_blocks_available = BIG_UINT(rdata,24);
 497         }
 498         if (total_file_nodes) {
 499                 *total_file_nodes = BIG_UINT(rdata,32);
 500         }
 501         if (free_file_nodes) {
 502                 *free_file_nodes = BIG_UINT(rdata,40);
 503         }
 504         if (fs_identifier) {
 505                 *fs_identifier = BIG_UINT(rdata,48);
 506         }
 507         return NT_STATUS_OK;
 508 }
 509
 510
 511 /******************************************************************************
 512  Send/receive the request encryption blob.
 513 ******************************************************************************/
 514
 515 static NTSTATUS enc_blob_send_receive(struct cli_state *cli, DATA_BLOB *in, DATA_BLOB *out, DATA_BLOB *param_out)
 516 {
 517         uint16_t setup[1];
 518         uint8_t param[4];
 519         uint8_t *rparam=NULL, *rdata=NULL;
 520         uint32_t num_rparam, num_rdata;
 521         NTSTATUS status;
 522
 523         SSVAL(setup+0, 0, TRANSACT2_SETFSINFO);
 524         SSVAL(param,0,0);
 525         SSVAL(param,2,SMB_REQUEST_TRANSPORT_ENCRYPTION);
 526
 527         status = cli_trans(talloc_tos(), cli, SMBtrans2, NULL, 0, 0, 0,
 528                            setup, 1, 0,
 529                            param, 4, 2,
 530                            (uint8_t *)in->data, in->length, CLI_BUFFER_SIZE,
 531                            NULL,          /* recv_flags */
 532                            NULL, 0, NULL, /* rsetup */
 533                            &rparam, 0, &num_rparam,
 534                            &rdata, 0, &num_rdata);
 535
 536         if (!NT_STATUS_IS_OK(status) &&
 537             !NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 538                 return status;
 539         }
 540
 541         *out = data_blob(rdata, num_rdata);
 542         *param_out = data_blob(rparam, num_rparam);
 543
 544         TALLOC_FREE(rparam);
 545         TALLOC_FREE(rdata);
 546         return status;
 547 }
 548
 549 /******************************************************************************
 550  Make a client state struct.
 551 ******************************************************************************/
 552
 553 static struct smb_trans_enc_state *make_cli_enc_state(enum smb_trans_enc_type smb_enc_type)
 554 {
 555         struct smb_trans_enc_state *es = NULL;
 556         es = SMB_MALLOC_P(struct smb_trans_enc_state);
 557         if (!es) {
 558                 return NULL;
 559         }
 560         ZERO_STRUCTP(es);
 561         es->smb_enc_type = smb_enc_type;
 562
 563 #if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
 564         if (smb_enc_type == SMB_TRANS_ENC_GSS) {
 565                 es->s.gss_state = SMB_MALLOC_P(struct smb_tran_enc_state_gss);
 566                 if (!es->s.gss_state) {
 567                         SAFE_FREE(es);
 568                         return NULL;
 569                 }
 570                 ZERO_STRUCTP(es->s.gss_state);
 571         }
 572 #endif
 573         return es;
 574 }
 575
 576 /******************************************************************************
 577  Start a raw ntlmssp encryption.
 578 ******************************************************************************/
 579
 580 NTSTATUS cli_raw_ntlm_smb_encryption_start(struct cli_state *cli,
 581                                 const char *user,
 582                                 const char *pass,
 583                                 const char *domain)
 584 {
 585         DATA_BLOB blob_in = data_blob_null;
 586         DATA_BLOB blob_out = data_blob_null;
 587         DATA_BLOB param_out = data_blob_null;
 588         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 589         struct smb_trans_enc_state *es = make_cli_enc_state(SMB_TRANS_ENC_NTLM);
 590
 591         if (!es) {
 592                 return NT_STATUS_NO_MEMORY;
 593         }
 594         status = ntlmssp_client_start(NULL,
 595                                       lp_netbios_name(),
 596                                       lp_workgroup(),
 597                                       lp_client_ntlmv2_auth(),
 598                                       &es->s.ntlmssp_state);
 599         if (!NT_STATUS_IS_OK(status)) {
 600                 goto fail;
 601         }
 602
 603         ntlmssp_want_feature(es->s.ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
 604         es->s.ntlmssp_state->neg_flags |= (NTLMSSP_NEGOTIATE_SIGN|NTLMSSP_NEGOTIATE_SEAL);
 605
 606         if (!NT_STATUS_IS_OK(status = ntlmssp_set_username(es->s.ntlmssp_state, user))) {
 607                 goto fail;
 608         }
 609         if (!NT_STATUS_IS_OK(status = ntlmssp_set_domain(es->s.ntlmssp_state, domain))) {
 610                 goto fail;
 611         }
 612         if (!NT_STATUS_IS_OK(status = ntlmssp_set_password(es->s.ntlmssp_state, pass))) {
 613                 goto fail;
 614         }
 615
 616         do {
 617                 status = ntlmssp_update(es->s.ntlmssp_state, blob_in, &blob_out);
 618                 data_blob_free(&blob_in);
 619                 data_blob_free(&param_out);
 620                 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) || NT_STATUS_IS_OK(status)) {
 621                         NTSTATUS trans_status = enc_blob_send_receive(cli,
 622                                                                         &blob_out,
 623                                                                         &blob_in,
 624                                                                         &param_out);
 625                         if (!NT_STATUS_EQUAL(trans_status,
 626                                         NT_STATUS_MORE_PROCESSING_REQUIRED) &&
 627                                         !NT_STATUS_IS_OK(trans_status)) {
 628                                 status = trans_status;
 629                         } else {
 630                                 if (param_out.length == 2) {
 631                                         es->enc_ctx_num = SVAL(param_out.data, 0);
 632                                 }
 633                         }
 634                 }
 635                 data_blob_free(&blob_out);
 636         } while (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED));
 637
 638         data_blob_free(&blob_in);
 639
 640         if (NT_STATUS_IS_OK(status)) {
 641                 /* Replace the old state, if any. */
 642                 if (cli->trans_enc_state) {
 643                         common_free_encryption_state(&cli->trans_enc_state);
 644                 }
 645                 cli->trans_enc_state = es;
 646                 cli->trans_enc_state->enc_on = True;
 647                 es = NULL;
 648         }
 649
 650   fail:
 651
 652         common_free_encryption_state(&es);
 653         return status;
 654 }
 655
 656 #if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
 657
 658 #ifndef SMB_GSS_REQUIRED_FLAGS
 659 #define SMB_GSS_REQUIRED_FLAGS (GSS_C_CONF_FLAG|GSS_C_INTEG_FLAG|GSS_C_MUTUAL_FLAG|GSS_C_REPLAY_FLAG|GSS_C_SEQUENCE_FLAG)
 660 #endif
 661
 662 /******************************************************************************
 663  Get client gss blob to send to a server.
 664 ******************************************************************************/
 665
 666 static NTSTATUS make_cli_gss_blob(TALLOC_CTX *ctx,
 667                                 struct smb_trans_enc_state *es,
 668                                 const char *service,
 669                                 const char *host,
 670                                 NTSTATUS status_in,
 671                                 DATA_BLOB spnego_blob_in,
 672                                 DATA_BLOB *p_blob_out)
 673 {
 674         const char *krb_mechs[] = {OID_KERBEROS5, NULL};
 675         OM_uint32 ret;
 676         OM_uint32 min;
 677         gss_name_t srv_name;
 678         gss_buffer_desc input_name;
 679         gss_buffer_desc *p_tok_in;
 680         gss_buffer_desc tok_out, tok_in;
 681         DATA_BLOB blob_out = data_blob_null;
 682         DATA_BLOB blob_in = data_blob_null;
 683         char *host_princ_s = NULL;
 684         OM_uint32 ret_flags = 0;
 685         NTSTATUS status = NT_STATUS_OK;
 686
 687         gss_OID_desc nt_hostbased_service =
 688         {10, discard_const_p(char, "\x2a\x86\x48\x86\xf7\x12\x01\x02\x01\x04")};
 689
 690         memset(&tok_out, '\0', sizeof(tok_out));
 691
 692         /* Get a ticket for the service@host */
 693         if (asprintf(&host_princ_s, "%s@%s", service, host) == -1) {
 694                 return NT_STATUS_NO_MEMORY;
 695         }
 696
 697         input_name.value = host_princ_s;
 698         input_name.length = strlen(host_princ_s) + 1;
 699
 700         ret = gss_import_name(&min,
 701                                 &input_name,
 702                                 &nt_hostbased_service,
 703                                 &srv_name);
 704
 705         if (ret != GSS_S_COMPLETE) {
 706                 SAFE_FREE(host_princ_s);
 707                 return map_nt_error_from_gss(ret, min);
 708         }
 709
 710         if (spnego_blob_in.length == 0) {
 711                 p_tok_in = GSS_C_NO_BUFFER;
 712         } else {
 713                 /* Remove the SPNEGO wrapper */
 714                 if (!spnego_parse_auth_response(ctx, spnego_blob_in, status_in, OID_KERBEROS5, &blob_in)) {
 715                         status = NT_STATUS_UNSUCCESSFUL;
 716                         goto fail;
 717                 }
 718                 tok_in.value = blob_in.data;
 719                 tok_in.length = blob_in.length;
 720                 p_tok_in = &tok_in;
 721         }
 722
 723         ret = gss_init_sec_context(&min,
 724                                 GSS_C_NO_CREDENTIAL, /* Use our default cred. */
 725                                 &es->s.gss_state->gss_ctx,
 726                                 srv_name,
 727                                 GSS_C_NO_OID, /* default OID. */
 728                                 GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG | GSS_C_DELEG_FLAG,
 729                                 GSS_C_INDEFINITE,       /* requested ticket lifetime. */
 730                                 NULL,   /* no channel bindings */
 731                                 p_tok_in,
 732                                 NULL,   /* ignore mech type */
 733                                 &tok_out,
 734                                 &ret_flags,
 735                                 NULL);  /* ignore time_rec */
 736
 737         status = map_nt_error_from_gss(ret, min);
 738         if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 739                 ADS_STATUS adss = ADS_ERROR_GSS(ret, min);
 740                 DEBUG(10,("make_cli_gss_blob: gss_init_sec_context failed with %s\n",
 741                         ads_errstr(adss)));
 742                 goto fail;
 743         }
 744
 745         if ((ret_flags & SMB_GSS_REQUIRED_FLAGS) != SMB_GSS_REQUIRED_FLAGS) {
 746                 status = NT_STATUS_ACCESS_DENIED;
 747         }
 748
 749         blob_out = data_blob_talloc(ctx, tok_out.value, tok_out.length);
 750
 751         /* Wrap in an SPNEGO wrapper */
 752         *p_blob_out = spnego_gen_negTokenInit(ctx, krb_mechs, &blob_out, NULL);
 753
 754   fail:
 755
 756         data_blob_free(&blob_out);
 757         data_blob_free(&blob_in);
 758         SAFE_FREE(host_princ_s);
 759         gss_release_name(&min, &srv_name);
 760         if (tok_out.value) {
 761                 gss_release_buffer(&min, &tok_out);
 762         }
 763         return status;
 764 }
 765
 766 /******************************************************************************
 767  Start a SPNEGO gssapi encryption context.
 768 ******************************************************************************/
 769
 770 NTSTATUS cli_gss_smb_encryption_start(struct cli_state *cli)
 771 {
 772         DATA_BLOB blob_recv = data_blob_null;
 773         DATA_BLOB blob_send = data_blob_null;
 774         DATA_BLOB param_out = data_blob_null;
 775         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 776         fstring fqdn;
 777         const char *servicename;
 778         struct smb_trans_enc_state *es = make_cli_enc_state(SMB_TRANS_ENC_GSS);
 779
 780         if (!es) {
 781                 return NT_STATUS_NO_MEMORY;
 782         }
 783
 784         name_to_fqdn(fqdn, cli->desthost);
 785         strlower_m(fqdn);
 786
 787         servicename = "cifs";
 788         status = make_cli_gss_blob(talloc_tos(), es, servicename, fqdn, NT_STATUS_OK, blob_recv, &blob_send);
 789         if (!NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 790                 servicename = "host";
 791                 status = make_cli_gss_blob(talloc_tos(), es, servicename, fqdn, NT_STATUS_OK, blob_recv, &blob_send);
 792                 if (!NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 793                         goto fail;
 794                 }
 795         }
 796
 797         do {
 798                 data_blob_free(&blob_recv);
 799                 status = enc_blob_send_receive(cli, &blob_send, &blob_recv, &param_out);
 800                 if (param_out.length == 2) {
 801                         es->enc_ctx_num = SVAL(param_out.data, 0);
 802                 }
 803                 data_blob_free(&blob_send);
 804                 status = make_cli_gss_blob(talloc_tos(), es, servicename, fqdn, status, blob_recv, &blob_send);
 805         } while (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED));
 806         data_blob_free(&blob_recv);
 807
 808         if (NT_STATUS_IS_OK(status)) {
 809                 /* Replace the old state, if any. */
 810                 if (cli->trans_enc_state) {
 811                         common_free_encryption_state(&cli->trans_enc_state);
 812                 }
 813                 cli->trans_enc_state = es;
 814                 cli->trans_enc_state->enc_on = True;
 815                 es = NULL;
 816         }
 817
 818   fail:
 819
 820         common_free_encryption_state(&es);
 821         return status;
 822 }
 823 #else
 824 NTSTATUS cli_gss_smb_encryption_start(struct cli_state *cli)
 825 {
 826         return NT_STATUS_NOT_SUPPORTED;
 827 }
 828 #endif
 829
 830 /********************************************************************
 831  Ensure a connection is encrypted.
 832 ********************************************************************/
 833
 834 NTSTATUS cli_force_encryption(struct cli_state *c,
 835                         const char *username,
 836                         const char *password,
 837                         const char *domain)
 838 {
 839         uint16 major, minor;
 840         uint32 caplow, caphigh;
 841         NTSTATUS status;
 842
 843         if (!SERVER_HAS_UNIX_CIFS(c)) {
 844                 return NT_STATUS_NOT_SUPPORTED;
 845         }
 846
 847         status = cli_unix_extensions_version(c, &major, &minor, &caplow,
 848                                              &caphigh);
 849         if (!NT_STATUS_IS_OK(status)) {
 850                 DEBUG(10, ("cli_force_encryption: cli_unix_extensions_version "
 851                            "returned %s\n", nt_errstr(status)));
 852                 return NT_STATUS_UNKNOWN_REVISION;
 853         }
 854
 855         if (!(caplow & CIFS_UNIX_TRANSPORT_ENCRYPTION_CAP)) {
 856                 return NT_STATUS_UNSUPPORTED_COMPRESSION;
 857         }
 858
 859         if (c->use_kerberos) {
 860                 return cli_gss_smb_encryption_start(c);
 861         }
 862         return cli_raw_ntlm_smb_encryption_start(c,
 863                                         username,
 864                                         password,
 865                                         domain);
 866 }