source/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
  23 /****************************************************************************
  24  Get UNIX extensions version info.
  25 ****************************************************************************/
  26
  27 BOOL cli_unix_extensions_version(struct cli_state *cli, uint16 *pmajor, uint16 *pminor,
  28                                         uint32 *pcaplow, uint32 *pcaphigh)
  29 {
  30         BOOL ret = False;
  31         uint16 setup;
  32         char param[2];
  33         char *rparam=NULL, *rdata=NULL;
  34         unsigned int rparam_count=0, rdata_count=0;
  35
  36         setup = TRANSACT2_QFSINFO;
  37
  38         SSVAL(param,0,SMB_QUERY_CIFS_UNIX_INFO);
  39
  40         if (!cli_send_trans(cli, SMBtrans2,
  41                     NULL,
  42                     0, 0,
  43                     &setup, 1, 0,
  44                     param, 2, 0,
  45                     NULL, 0, 560)) {
  46                 goto cleanup;
  47         }
  48
  49         if (!cli_receive_trans(cli, SMBtrans2,
  50                               &rparam, &rparam_count,
  51                               &rdata, &rdata_count)) {
  52                 goto cleanup;
  53         }
  54
  55         if (cli_is_error(cli)) {
  56                 ret = False;
  57                 goto cleanup;
  58         } else {
  59                 ret = True;
  60         }
  61
  62         if (rdata_count < 12) {
  63                 goto cleanup;
  64         }
  65
  66         *pmajor = SVAL(rdata,0);
  67         *pminor = SVAL(rdata,2);
  68         cli->posix_capabilities = *pcaplow = IVAL(rdata,4);
  69         *pcaphigh = IVAL(rdata,8);
  70
  71         /* todo: but not yet needed
  72          *       return the other stuff
  73          */
  74
  75 cleanup:
  76         SAFE_FREE(rparam);
  77         SAFE_FREE(rdata);
  78
  79         return ret;
  80 }
  81
  82 /****************************************************************************
  83  Set UNIX extensions capabilities.
  84 ****************************************************************************/
  85
  86 BOOL cli_set_unix_extensions_capabilities(struct cli_state *cli, uint16 major, uint16 minor,
  87                                         uint32 caplow, uint32 caphigh)
  88 {
  89         BOOL ret = False;
  90         uint16 setup;
  91         char param[4];
  92         char data[12];
  93         char *rparam=NULL, *rdata=NULL;
  94         unsigned int rparam_count=0, rdata_count=0;
  95
  96         setup = TRANSACT2_SETFSINFO;
  97
  98         SSVAL(param,0,0);
  99         SSVAL(param,2,SMB_SET_CIFS_UNIX_INFO);
 100
 101         SSVAL(data,0,major);
 102         SSVAL(data,2,minor);
 103         SIVAL(data,4,caplow);
 104         SIVAL(data,8,caphigh);
 105
 106         if (!cli_send_trans(cli, SMBtrans2,
 107                     NULL,
 108                     0, 0,
 109                     &setup, 1, 0,
 110                     param, 4, 0,
 111                     data, 12, 560)) {
 112                 goto cleanup;
 113         }
 114
 115         if (!cli_receive_trans(cli, SMBtrans2,
 116                               &rparam, &rparam_count,
 117                               &rdata, &rdata_count)) {
 118                 goto cleanup;
 119         }
 120
 121         if (cli_is_error(cli)) {
 122                 ret = False;
 123                 goto cleanup;
 124         } else {
 125                 ret = True;
 126         }
 127
 128 cleanup:
 129         SAFE_FREE(rparam);
 130         SAFE_FREE(rdata);
 131
 132         return ret;
 133 }
 134
 135 BOOL cli_get_fs_attr_info(struct cli_state *cli, uint32 *fs_attr)
 136 {
 137         BOOL ret = False;
 138         uint16 setup;
 139         char param[2];
 140         char *rparam=NULL, *rdata=NULL;
 141         unsigned int rparam_count=0, rdata_count=0;
 142
 143         if (!cli||!fs_attr)
 144                 smb_panic("cli_get_fs_attr_info() called with NULL Pionter!");
 145
 146         setup = TRANSACT2_QFSINFO;
 147
 148         SSVAL(param,0,SMB_QUERY_FS_ATTRIBUTE_INFO);
 149
 150         if (!cli_send_trans(cli, SMBtrans2,
 151                     NULL,
 152                     0, 0,
 153                     &setup, 1, 0,
 154                     param, 2, 0,
 155                     NULL, 0, 560)) {
 156                 goto cleanup;
 157         }
 158
 159         if (!cli_receive_trans(cli, SMBtrans2,
 160                               &rparam, &rparam_count,
 161                               &rdata, &rdata_count)) {
 162                 goto cleanup;
 163         }
 164
 165         if (cli_is_error(cli)) {
 166                 ret = False;
 167                 goto cleanup;
 168         } else {
 169                 ret = True;
 170         }
 171
 172         if (rdata_count < 12) {
 173                 goto cleanup;
 174         }
 175
 176         *fs_attr = IVAL(rdata,0);
 177
 178         /* todo: but not yet needed
 179          *       return the other stuff
 180          */
 181
 182 cleanup:
 183         SAFE_FREE(rparam);
 184         SAFE_FREE(rdata);
 185
 186         return ret;
 187 }
 188
 189 BOOL cli_get_fs_volume_info_old(struct cli_state *cli, fstring volume_name, uint32 *pserial_number)
 190 {
 191         BOOL ret = False;
 192         uint16 setup;
 193         char param[2];
 194         char *rparam=NULL, *rdata=NULL;
 195         unsigned int rparam_count=0, rdata_count=0;
 196         unsigned char nlen;
 197
 198         setup = TRANSACT2_QFSINFO;
 199
 200         SSVAL(param,0,SMB_INFO_VOLUME);
 201
 202         if (!cli_send_trans(cli, SMBtrans2,
 203                     NULL,
 204                     0, 0,
 205                     &setup, 1, 0,
 206                     param, 2, 0,
 207                     NULL, 0, 560)) {
 208                 goto cleanup;
 209         }
 210
 211         if (!cli_receive_trans(cli, SMBtrans2,
 212                               &rparam, &rparam_count,
 213                               &rdata, &rdata_count)) {
 214                 goto cleanup;
 215         }
 216
 217         if (cli_is_error(cli)) {
 218                 ret = False;
 219                 goto cleanup;
 220         } else {
 221                 ret = True;
 222         }
 223
 224         if (rdata_count < 5) {
 225                 goto cleanup;
 226         }
 227
 228         if (pserial_number) {
 229                 *pserial_number = IVAL(rdata,0);
 230         }
 231         nlen = CVAL(rdata,l2_vol_cch);
 232         clistr_pull(cli, volume_name, rdata + l2_vol_szVolLabel, sizeof(fstring), nlen, STR_NOALIGN);
 233
 234         /* todo: but not yet needed
 235          *       return the other stuff
 236          */
 237
 238 cleanup:
 239         SAFE_FREE(rparam);
 240         SAFE_FREE(rdata);
 241
 242         return ret;
 243 }
 244
 245 BOOL cli_get_fs_volume_info(struct cli_state *cli, fstring volume_name, uint32 *pserial_number, time_t *pdate)
 246 {
 247         BOOL ret = False;
 248         uint16 setup;
 249         char param[2];
 250         char *rparam=NULL, *rdata=NULL;
 251         unsigned int rparam_count=0, rdata_count=0;
 252         unsigned int nlen;
 253
 254         setup = TRANSACT2_QFSINFO;
 255
 256         SSVAL(param,0,SMB_QUERY_FS_VOLUME_INFO);
 257
 258         if (!cli_send_trans(cli, SMBtrans2,
 259                     NULL,
 260                     0, 0,
 261                     &setup, 1, 0,
 262                     param, 2, 0,
 263                     NULL, 0, 560)) {
 264                 goto cleanup;
 265         }
 266
 267         if (!cli_receive_trans(cli, SMBtrans2,
 268                               &rparam, &rparam_count,
 269                               &rdata, &rdata_count)) {
 270                 goto cleanup;
 271         }
 272
 273         if (cli_is_error(cli)) {
 274                 ret = False;
 275                 goto cleanup;
 276         } else {
 277                 ret = True;
 278         }
 279
 280         if (rdata_count < 19) {
 281                 goto cleanup;
 282         }
 283
 284         if (pdate) {
 285                 struct timespec ts;
 286                 ts = interpret_long_date(rdata);
 287                 *pdate = ts.tv_sec;
 288         }
 289         if (pserial_number) {
 290                 *pserial_number = IVAL(rdata,8);
 291         }
 292         nlen = IVAL(rdata,12);
 293         clistr_pull(cli, volume_name, rdata + 18, sizeof(fstring), nlen, STR_UNICODE);
 294
 295         /* todo: but not yet needed
 296          *       return the other stuff
 297          */
 298
 299 cleanup:
 300         SAFE_FREE(rparam);
 301         SAFE_FREE(rdata);
 302
 303         return ret;
 304 }
 305
 306 /******************************************************************************
 307  Send/receive the request encryption blob.
 308 ******************************************************************************/
 309
 310 static NTSTATUS enc_blob_send_receive(struct cli_state *cli, DATA_BLOB *in, DATA_BLOB *out, DATA_BLOB *param_out)
 311 {
 312         uint16 setup;
 313         char param[4];
 314         char *rparam=NULL, *rdata=NULL;
 315         unsigned int rparam_count=0, rdata_count=0;
 316         NTSTATUS status = NT_STATUS_OK;
 317
 318         setup = TRANSACT2_SETFSINFO;
 319
 320         SSVAL(param,0,0);
 321         SSVAL(param,2,SMB_REQUEST_TRANSPORT_ENCRYPTION);
 322
 323         if (!cli_send_trans(cli, SMBtrans2,
 324                                 NULL,
 325                                 0, 0,
 326                                 &setup, 1, 0,
 327                                 param, 4, 0,
 328                                 (char *)in->data, in->length, CLI_BUFFER_SIZE)) {
 329                 status = cli_nt_error(cli);
 330                 goto out;
 331         }
 332
 333         if (!cli_receive_trans(cli, SMBtrans2,
 334                                 &rparam, &rparam_count,
 335                                 &rdata, &rdata_count)) {
 336                 status = cli_nt_error(cli);
 337                 goto out;
 338         }
 339
 340         if (cli_is_error(cli)) {
 341                 status = cli_nt_error(cli);
 342                 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 343                         goto out;
 344                 }
 345         }
 346
 347         *out = data_blob(rdata, rdata_count);
 348         *param_out = data_blob(rparam, rparam_count);
 349
 350   out:
 351
 352         SAFE_FREE(rparam);
 353         SAFE_FREE(rdata);
 354         return status;
 355 }
 356
 357 /******************************************************************************
 358  Make a client state struct.
 359 ******************************************************************************/
 360
 361 static struct smb_trans_enc_state *make_cli_enc_state(enum smb_trans_enc_type smb_enc_type)
 362 {
 363         struct smb_trans_enc_state *es = NULL;
 364         es = SMB_MALLOC_P(struct smb_trans_enc_state);
 365         if (!es) {
 366                 return NULL;
 367         }
 368         ZERO_STRUCTP(es);
 369         es->smb_enc_type = smb_enc_type;
 370
 371         if (smb_enc_type == SMB_TRANS_ENC_GSS) {
 372 #if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
 373                 es->s.gss_state = SMB_MALLOC_P(struct smb_tran_enc_state_gss);
 374                 if (!es->s.gss_state) {
 375                         SAFE_FREE(es);
 376                         return NULL;
 377                 }
 378                 ZERO_STRUCTP(es->s.gss_state);
 379 #else
 380                 DEBUG(0,("make_cli_enc_state: no krb5 compiled.\n"));
 381                 SAFE_FREE(es);
 382                 return NULL;
 383 #endif
 384         }
 385         return es;
 386 }
 387
 388 /******************************************************************************
 389  Start a raw ntlmssp encryption.
 390 ******************************************************************************/
 391
 392 NTSTATUS cli_raw_ntlm_smb_encryption_start(struct cli_state *cli,
 393                                 const char *user,
 394                                 const char *pass,
 395                                 const char *domain)
 396 {
 397         DATA_BLOB blob_in = data_blob_null;
 398         DATA_BLOB blob_out = data_blob_null;
 399         DATA_BLOB param_out = data_blob_null;
 400         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 401         struct smb_trans_enc_state *es = make_cli_enc_state(SMB_TRANS_ENC_NTLM);
 402
 403         if (!es) {
 404                 return NT_STATUS_NO_MEMORY;
 405         }
 406         status = ntlmssp_client_start(&es->s.ntlmssp_state);
 407         if (!NT_STATUS_IS_OK(status)) {
 408                 goto fail;
 409         }
 410
 411         ntlmssp_want_feature(es->s.ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
 412         es->s.ntlmssp_state->neg_flags |= (NTLMSSP_NEGOTIATE_SIGN|NTLMSSP_NEGOTIATE_SEAL);
 413
 414         if (!NT_STATUS_IS_OK(status = ntlmssp_set_username(es->s.ntlmssp_state, user))) {
 415                 goto fail;
 416         }
 417         if (!NT_STATUS_IS_OK(status = ntlmssp_set_domain(es->s.ntlmssp_state, domain))) {
 418                 goto fail;
 419         }
 420         if (!NT_STATUS_IS_OK(status = ntlmssp_set_password(es->s.ntlmssp_state, pass))) {
 421                 goto fail;
 422         }
 423
 424         do {
 425                 status = ntlmssp_update(es->s.ntlmssp_state, blob_in, &blob_out);
 426                 data_blob_free(&blob_in);
 427                 data_blob_free(&param_out);
 428                 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) || NT_STATUS_IS_OK(status)) {
 429                         status = enc_blob_send_receive(cli, &blob_out, &blob_in, &param_out);
 430                 }
 431                 if (param_out.length == 2) {
 432                         es->enc_ctx_num = SVAL(param_out.data, 0);
 433                 }
 434                 data_blob_free(&blob_out);
 435         } while (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED));
 436
 437         data_blob_free(&blob_in);
 438
 439         if (NT_STATUS_IS_OK(status)) {
 440                 /* Replace the old state, if any. */
 441                 if (cli->trans_enc_state) {
 442                         common_free_encryption_state(&cli->trans_enc_state);
 443                 }
 444                 cli->trans_enc_state = es;
 445                 cli->trans_enc_state->enc_on = True;
 446                 es = NULL;
 447         }
 448
 449   fail:
 450
 451         common_free_encryption_state(&es);
 452         return status;
 453 }
 454
 455 #if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
 456
 457 #ifndef SMB_GSS_REQUIRED_FLAGS
 458 #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)
 459 #endif
 460
 461 /******************************************************************************
 462  Get client gss blob to send to a server.
 463 ******************************************************************************/
 464
 465 static NTSTATUS make_cli_gss_blob(struct smb_trans_enc_state *es,
 466                                 const char *service,
 467                                 const char *host,
 468                                 NTSTATUS status_in,
 469                                 DATA_BLOB spnego_blob_in,
 470                                 DATA_BLOB *p_blob_out)
 471 {
 472         const char *krb_mechs[] = {OID_KERBEROS5, NULL};
 473         OM_uint32 ret;
 474         OM_uint32 min;
 475         gss_name_t srv_name;
 476         gss_buffer_desc input_name;
 477         gss_buffer_desc *p_tok_in;
 478         gss_buffer_desc tok_out, tok_in;
 479         DATA_BLOB blob_out = data_blob_null;
 480         DATA_BLOB blob_in = data_blob_null;
 481         char *host_princ_s = NULL;
 482         OM_uint32 ret_flags = 0;
 483         NTSTATUS status = NT_STATUS_OK;
 484
 485         gss_OID_desc nt_hostbased_service =
 486         {10, CONST_DISCARD(char *,"\x2a\x86\x48\x86\xf7\x12\x01\x02\x01\x04")};
 487
 488         memset(&tok_out, '\0', sizeof(tok_out));
 489
 490         /* Get a ticket for the service@host */
 491         asprintf(&host_princ_s, "%s@%s", service, host);
 492         if (host_princ_s == NULL) {
 493                 return NT_STATUS_NO_MEMORY;
 494         }
 495
 496         input_name.value = host_princ_s;
 497         input_name.length = strlen(host_princ_s) + 1;
 498
 499         ret = gss_import_name(&min,
 500                                 &input_name,
 501                                 &nt_hostbased_service,
 502                                 &srv_name);
 503
 504         if (ret != GSS_S_COMPLETE) {
 505                 SAFE_FREE(host_princ_s);
 506                 return map_nt_error_from_gss(ret, min);
 507         }
 508
 509         if (spnego_blob_in.length == 0) {
 510                 p_tok_in = GSS_C_NO_BUFFER;
 511         } else {
 512                 /* Remove the SPNEGO wrapper */
 513                 if (!spnego_parse_auth_response(spnego_blob_in, status_in, OID_KERBEROS5, &blob_in)) {
 514                         status = NT_STATUS_UNSUCCESSFUL;
 515                         goto fail;
 516                 }
 517                 tok_in.value = blob_in.data;
 518                 tok_in.length = blob_in.length;
 519                 p_tok_in = &tok_in;
 520         }
 521
 522         ret = gss_init_sec_context(&min,
 523                                 GSS_C_NO_CREDENTIAL, /* Use our default cred. */
 524                                 &es->s.gss_state->gss_ctx,
 525                                 srv_name,
 526                                 GSS_C_NO_OID, /* default OID. */
 527                                 GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG,
 528                                 GSS_C_INDEFINITE,       /* requested ticket lifetime. */
 529                                 NULL,   /* no channel bindings */
 530                                 p_tok_in,
 531                                 NULL,   /* ignore mech type */
 532                                 &tok_out,
 533                                 &ret_flags,
 534                                 NULL);  /* ignore time_rec */
 535
 536         status = map_nt_error_from_gss(ret, min);
 537         if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 538                 ADS_STATUS adss = ADS_ERROR_GSS(ret, min);
 539                 DEBUG(10,("make_cli_gss_blob: gss_init_sec_context failed with %s\n",
 540                         ads_errstr(adss)));
 541                 goto fail;
 542         }
 543
 544         if ((ret_flags & SMB_GSS_REQUIRED_FLAGS) != SMB_GSS_REQUIRED_FLAGS) {
 545                 status = NT_STATUS_ACCESS_DENIED;
 546         }
 547
 548         blob_out = data_blob(tok_out.value, tok_out.length);
 549
 550         /* Wrap in an SPNEGO wrapper */
 551         *p_blob_out = gen_negTokenTarg(krb_mechs, blob_out);
 552
 553   fail:
 554
 555         data_blob_free(&blob_out);
 556         data_blob_free(&blob_in);
 557         SAFE_FREE(host_princ_s);
 558         gss_release_name(&min, &srv_name);
 559         if (tok_out.value) {
 560                 gss_release_buffer(&min, &tok_out);
 561         }
 562         return status;
 563 }
 564
 565 /******************************************************************************
 566  Start a SPNEGO gssapi encryption context.
 567 ******************************************************************************/
 568
 569 NTSTATUS cli_gss_smb_encryption_start(struct cli_state *cli)
 570 {
 571         DATA_BLOB blob_recv = data_blob_null;
 572         DATA_BLOB blob_send = data_blob_null;
 573         DATA_BLOB param_out = data_blob_null;
 574         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 575         fstring fqdn;
 576         const char *servicename;
 577         struct smb_trans_enc_state *es = make_cli_enc_state(SMB_TRANS_ENC_GSS);
 578
 579         if (!es) {
 580                 return NT_STATUS_NO_MEMORY;
 581         }
 582
 583         name_to_fqdn(fqdn, cli->desthost);
 584         strlower_m(fqdn);
 585
 586         servicename = "cifs";
 587         status = make_cli_gss_blob(es, servicename, fqdn, NT_STATUS_OK, blob_recv, &blob_send);
 588         if (!NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 589                 servicename = "host";
 590                 status = make_cli_gss_blob(es, servicename, fqdn, NT_STATUS_OK, blob_recv, &blob_send);
 591                 if (!NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 592                         goto fail;
 593                 }
 594         }
 595
 596         do {
 597                 data_blob_free(&blob_recv);
 598                 status = enc_blob_send_receive(cli, &blob_send, &blob_recv, &param_out);
 599                 if (param_out.length == 2) {
 600                         es->enc_ctx_num = SVAL(param_out.data, 0);
 601                 }
 602                 data_blob_free(&blob_send);
 603                 status = make_cli_gss_blob(es, servicename, fqdn, status, blob_recv, &blob_send);
 604         } while (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED));
 605         data_blob_free(&blob_recv);
 606
 607         if (NT_STATUS_IS_OK(status)) {
 608                 /* Replace the old state, if any. */
 609                 if (cli->trans_enc_state) {
 610                         common_free_encryption_state(&cli->trans_enc_state);
 611                 }
 612                 cli->trans_enc_state = es;
 613                 cli->trans_enc_state->enc_on = True;
 614                 es = NULL;
 615         }
 616
 617   fail:
 618
 619         common_free_encryption_state(&es);
 620         return status;
 621 }
 622 #else
 623 NTSTATUS cli_gss_smb_encryption_start(struct cli_state *cli)
 624 {
 625         return NT_STATUS_NOT_SUPPORTED;
 626 }
 627 #endif