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, write to the Free Software
  19    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20 */
  21
  22 #include "includes.h"
  23
  24 /****************************************************************************
  25  Get UNIX extensions version info.
  26 ****************************************************************************/
  27
  28 BOOL cli_unix_extensions_version(struct cli_state *cli, uint16 *pmajor, uint16 *pminor,
  29                                         uint32 *pcaplow, uint32 *pcaphigh)
  30 {
  31         BOOL ret = False;
  32         uint16 setup;
  33         char param[2];
  34         char *rparam=NULL, *rdata=NULL;
  35         unsigned int rparam_count=0, rdata_count=0;
  36
  37         setup = TRANSACT2_QFSINFO;
  38
  39         SSVAL(param,0,SMB_QUERY_CIFS_UNIX_INFO);
  40
  41         if (!cli_send_trans(cli, SMBtrans2,
  42                     NULL,
  43                     0, 0,
  44                     &setup, 1, 0,
  45                     param, 2, 0,
  46                     NULL, 0, 560)) {
  47                 goto cleanup;
  48         }
  49
  50         if (!cli_receive_trans(cli, SMBtrans2,
  51                               &rparam, &rparam_count,
  52                               &rdata, &rdata_count)) {
  53                 goto cleanup;
  54         }
  55
  56         if (cli_is_error(cli)) {
  57                 ret = False;
  58                 goto cleanup;
  59         } else {
  60                 ret = True;
  61         }
  62
  63         if (rdata_count < 12) {
  64                 goto cleanup;
  65         }
  66
  67         *pmajor = SVAL(rdata,0);
  68         *pminor = SVAL(rdata,2);
  69         cli->posix_capabilities = *pcaplow = IVAL(rdata,4);
  70         *pcaphigh = IVAL(rdata,8);
  71
  72         /* todo: but not yet needed
  73          *       return the other stuff
  74          */
  75
  76 cleanup:
  77         SAFE_FREE(rparam);
  78         SAFE_FREE(rdata);
  79
  80         return ret;
  81 }
  82
  83 /****************************************************************************
  84  Set UNIX extensions capabilities.
  85 ****************************************************************************/
  86
  87 BOOL cli_set_unix_extensions_capabilities(struct cli_state *cli, uint16 major, uint16 minor,
  88                                         uint32 caplow, uint32 caphigh)
  89 {
  90         BOOL ret = False;
  91         uint16 setup;
  92         char param[4];
  93         char data[12];
  94         char *rparam=NULL, *rdata=NULL;
  95         unsigned int rparam_count=0, rdata_count=0;
  96
  97         setup = TRANSACT2_SETFSINFO;
  98
  99         SSVAL(param,0,0);
 100         SSVAL(param,2,SMB_SET_CIFS_UNIX_INFO);
 101
 102         SSVAL(data,0,major);
 103         SSVAL(data,2,minor);
 104         SIVAL(data,4,caplow);
 105         SIVAL(data,8,caphigh);
 106
 107         if (!cli_send_trans(cli, SMBtrans2,
 108                     NULL,
 109                     0, 0,
 110                     &setup, 1, 0,
 111                     param, 4, 0,
 112                     data, 12, 560)) {
 113                 goto cleanup;
 114         }
 115
 116         if (!cli_receive_trans(cli, SMBtrans2,
 117                               &rparam, &rparam_count,
 118                               &rdata, &rdata_count)) {
 119                 goto cleanup;
 120         }
 121
 122         if (cli_is_error(cli)) {
 123                 ret = False;
 124                 goto cleanup;
 125         } else {
 126                 ret = True;
 127         }
 128
 129 cleanup:
 130         SAFE_FREE(rparam);
 131         SAFE_FREE(rdata);
 132
 133         return ret;
 134 }
 135
 136 BOOL cli_get_fs_attr_info(struct cli_state *cli, uint32 *fs_attr)
 137 {
 138         BOOL ret = False;
 139         uint16 setup;
 140         char param[2];
 141         char *rparam=NULL, *rdata=NULL;
 142         unsigned int rparam_count=0, rdata_count=0;
 143
 144         if (!cli||!fs_attr)
 145                 smb_panic("cli_get_fs_attr_info() called with NULL Pionter!");
 146
 147         setup = TRANSACT2_QFSINFO;
 148
 149         SSVAL(param,0,SMB_QUERY_FS_ATTRIBUTE_INFO);
 150
 151         if (!cli_send_trans(cli, SMBtrans2,
 152                     NULL,
 153                     0, 0,
 154                     &setup, 1, 0,
 155                     param, 2, 0,
 156                     NULL, 0, 560)) {
 157                 goto cleanup;
 158         }
 159
 160         if (!cli_receive_trans(cli, SMBtrans2,
 161                               &rparam, &rparam_count,
 162                               &rdata, &rdata_count)) {
 163                 goto cleanup;
 164         }
 165
 166         if (cli_is_error(cli)) {
 167                 ret = False;
 168                 goto cleanup;
 169         } else {
 170                 ret = True;
 171         }
 172
 173         if (rdata_count < 12) {
 174                 goto cleanup;
 175         }
 176
 177         *fs_attr = IVAL(rdata,0);
 178
 179         /* todo: but not yet needed
 180          *       return the other stuff
 181          */
 182
 183 cleanup:
 184         SAFE_FREE(rparam);
 185         SAFE_FREE(rdata);
 186
 187         return ret;
 188 }
 189
 190 BOOL cli_get_fs_volume_info_old(struct cli_state *cli, fstring volume_name, uint32 *pserial_number)
 191 {
 192         BOOL ret = False;
 193         uint16 setup;
 194         char param[2];
 195         char *rparam=NULL, *rdata=NULL;
 196         unsigned int rparam_count=0, rdata_count=0;
 197         unsigned char nlen;
 198
 199         setup = TRANSACT2_QFSINFO;
 200
 201         SSVAL(param,0,SMB_INFO_VOLUME);
 202
 203         if (!cli_send_trans(cli, SMBtrans2,
 204                     NULL,
 205                     0, 0,
 206                     &setup, 1, 0,
 207                     param, 2, 0,
 208                     NULL, 0, 560)) {
 209                 goto cleanup;
 210         }
 211
 212         if (!cli_receive_trans(cli, SMBtrans2,
 213                               &rparam, &rparam_count,
 214                               &rdata, &rdata_count)) {
 215                 goto cleanup;
 216         }
 217
 218         if (cli_is_error(cli)) {
 219                 ret = False;
 220                 goto cleanup;
 221         } else {
 222                 ret = True;
 223         }
 224
 225         if (rdata_count < 5) {
 226                 goto cleanup;
 227         }
 228
 229         if (pserial_number) {
 230                 *pserial_number = IVAL(rdata,0);
 231         }
 232         nlen = CVAL(rdata,l2_vol_cch);
 233         clistr_pull(cli, volume_name, rdata + l2_vol_szVolLabel, sizeof(fstring), nlen, STR_NOALIGN);
 234
 235         /* todo: but not yet needed
 236          *       return the other stuff
 237          */
 238
 239 cleanup:
 240         SAFE_FREE(rparam);
 241         SAFE_FREE(rdata);
 242
 243         return ret;
 244 }
 245
 246 BOOL cli_get_fs_volume_info(struct cli_state *cli, fstring volume_name, uint32 *pserial_number, time_t *pdate)
 247 {
 248         BOOL ret = False;
 249         uint16 setup;
 250         char param[2];
 251         char *rparam=NULL, *rdata=NULL;
 252         unsigned int rparam_count=0, rdata_count=0;
 253         unsigned int nlen;
 254
 255         setup = TRANSACT2_QFSINFO;
 256
 257         SSVAL(param,0,SMB_QUERY_FS_VOLUME_INFO);
 258
 259         if (!cli_send_trans(cli, SMBtrans2,
 260                     NULL,
 261                     0, 0,
 262                     &setup, 1, 0,
 263                     param, 2, 0,
 264                     NULL, 0, 560)) {
 265                 goto cleanup;
 266         }
 267
 268         if (!cli_receive_trans(cli, SMBtrans2,
 269                               &rparam, &rparam_count,
 270                               &rdata, &rdata_count)) {
 271                 goto cleanup;
 272         }
 273
 274         if (cli_is_error(cli)) {
 275                 ret = False;
 276                 goto cleanup;
 277         } else {
 278                 ret = True;
 279         }
 280
 281         if (rdata_count < 19) {
 282                 goto cleanup;
 283         }
 284
 285         if (pdate) {
 286                 struct timespec ts;
 287                 ts = interpret_long_date(rdata);
 288                 *pdate = ts.tv_sec;
 289         }
 290         if (pserial_number) {
 291                 *pserial_number = IVAL(rdata,8);
 292         }
 293         nlen = IVAL(rdata,12);
 294         clistr_pull(cli, volume_name, rdata + 18, sizeof(fstring), nlen, STR_UNICODE);
 295
 296         /* todo: but not yet needed
 297          *       return the other stuff
 298          */
 299
 300 cleanup:
 301         SAFE_FREE(rparam);
 302         SAFE_FREE(rdata);
 303
 304         return ret;
 305 }
 306
 307 /******************************************************************************
 308  Send/receive the request encryption blob.
 309 ******************************************************************************/
 310
 311 static NTSTATUS enc_blob_send_receive(struct cli_state *cli, DATA_BLOB *in, DATA_BLOB *out, DATA_BLOB *param_out)
 312 {
 313         uint16 setup;
 314         char param[4];
 315         char *rparam=NULL, *rdata=NULL;
 316         unsigned int rparam_count=0, rdata_count=0;
 317         NTSTATUS status = NT_STATUS_OK;
 318
 319         setup = TRANSACT2_SETFSINFO;
 320
 321         SSVAL(param,0,0);
 322         SSVAL(param,2,SMB_REQUEST_TRANSPORT_ENCRYPTION);
 323
 324         if (!cli_send_trans(cli, SMBtrans2,
 325                                 NULL,
 326                                 0, 0,
 327                                 &setup, 1, 0,
 328                                 param, 4, 0,
 329                                 (char *)in->data, in->length, CLI_BUFFER_SIZE)) {
 330                 status = cli_nt_error(cli);
 331                 goto out;
 332         }
 333
 334         if (!cli_receive_trans(cli, SMBtrans2,
 335                                 &rparam, &rparam_count,
 336                                 &rdata, &rdata_count)) {
 337                 status = cli_nt_error(cli);
 338                 goto out;
 339         }
 340
 341         if (cli_is_error(cli)) {
 342                 status = cli_nt_error(cli);
 343                 if (!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 344                         goto out;
 345                 }
 346         }
 347
 348         *out = data_blob(rdata, rdata_count);
 349         *param_out = data_blob(rparam, rparam_count);
 350
 351   out:
 352
 353         SAFE_FREE(rparam);
 354         SAFE_FREE(rdata);
 355         return status;
 356 }
 357
 358 /******************************************************************************
 359  Make a client state struct.
 360 ******************************************************************************/
 361
 362 static struct smb_trans_enc_state *make_cli_enc_state(enum smb_trans_enc_type smb_enc_type)
 363 {
 364         struct smb_trans_enc_state *es = NULL;
 365         es = SMB_MALLOC_P(struct smb_trans_enc_state);
 366         if (!es) {
 367                 return NULL;
 368         }
 369         ZERO_STRUCTP(es);
 370         es->smb_enc_type = smb_enc_type;
 371
 372         if (smb_enc_type == SMB_TRANS_ENC_GSS) {
 373 #if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
 374                 es->s.gss_state = SMB_MALLOC_P(struct smb_tran_enc_state_gss);
 375                 if (!es->s.gss_state) {
 376                         SAFE_FREE(es);
 377                         return NULL;
 378                 }
 379                 ZERO_STRUCTP(es->s.gss_state);
 380 #else
 381                 DEBUG(0,("make_cli_enc_state: no krb5 compiled.\n"));
 382                 SAFE_FREE(es);
 383                 return NULL;
 384 #endif
 385         }
 386         return es;
 387 }
 388
 389 /******************************************************************************
 390  Start a raw ntlmssp encryption.
 391 ******************************************************************************/
 392
 393 NTSTATUS cli_raw_ntlm_smb_encryption_start(struct cli_state *cli,
 394                                 const char *user,
 395                                 const char *pass,
 396                                 const char *domain)
 397 {
 398         DATA_BLOB blob_in = data_blob_null;
 399         DATA_BLOB blob_out = data_blob_null;
 400         DATA_BLOB param_out = data_blob_null;
 401         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 402         struct smb_trans_enc_state *es = make_cli_enc_state(SMB_TRANS_ENC_NTLM);
 403
 404         if (!es) {
 405                 return NT_STATUS_NO_MEMORY;
 406         }
 407         status = ntlmssp_client_start(&es->s.ntlmssp_state);
 408         if (!NT_STATUS_IS_OK(status)) {
 409                 goto fail;
 410         }
 411
 412         ntlmssp_want_feature(es->s.ntlmssp_state, NTLMSSP_FEATURE_SESSION_KEY);
 413         es->s.ntlmssp_state->neg_flags |= (NTLMSSP_NEGOTIATE_SIGN|NTLMSSP_NEGOTIATE_SEAL);
 414
 415         if (!NT_STATUS_IS_OK(status = ntlmssp_set_username(es->s.ntlmssp_state, user))) {
 416                 goto fail;
 417         }
 418         if (!NT_STATUS_IS_OK(status = ntlmssp_set_domain(es->s.ntlmssp_state, domain))) {
 419                 goto fail;
 420         }
 421         if (!NT_STATUS_IS_OK(status = ntlmssp_set_password(es->s.ntlmssp_state, pass))) {
 422                 goto fail;
 423         }
 424
 425         do {
 426                 status = ntlmssp_update(es->s.ntlmssp_state, blob_in, &blob_out);
 427                 data_blob_free(&blob_in);
 428                 data_blob_free(&param_out);
 429                 if (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED) || NT_STATUS_IS_OK(status)) {
 430                         status = enc_blob_send_receive(cli, &blob_out, &blob_in, &param_out);
 431                 }
 432                 if (param_out.length == 2) {
 433                         es->enc_ctx_num = SVAL(param_out.data, 0);
 434                 }
 435                 data_blob_free(&blob_out);
 436         } while (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED));
 437
 438         data_blob_free(&blob_in);
 439
 440         if (NT_STATUS_IS_OK(status)) {
 441                 /* Replace the old state, if any. */
 442                 if (cli->trans_enc_state) {
 443                         common_free_encryption_state(&cli->trans_enc_state);
 444                 }
 445                 cli->trans_enc_state = es;
 446                 cli->trans_enc_state->enc_on = True;
 447                 es = NULL;
 448         }
 449
 450   fail:
 451
 452         common_free_encryption_state(&es);
 453         return status;
 454 }
 455
 456 #if defined(HAVE_GSSAPI) && defined(HAVE_KRB5)
 457
 458 #ifndef SMB_GSS_REQUIRED_FLAGS
 459 #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)
 460 #endif
 461
 462 /******************************************************************************
 463  Get client gss blob to send to a server.
 464 ******************************************************************************/
 465
 466 static NTSTATUS make_cli_gss_blob(struct smb_trans_enc_state *es,
 467                                 const char *service,
 468                                 const char *host,
 469                                 NTSTATUS status_in,
 470                                 DATA_BLOB spnego_blob_in,
 471                                 DATA_BLOB *p_blob_out)
 472 {
 473         const char *krb_mechs[] = {OID_KERBEROS5, NULL};
 474         OM_uint32 ret;
 475         OM_uint32 min;
 476         gss_name_t srv_name;
 477         gss_buffer_desc input_name;
 478         gss_buffer_desc *p_tok_in;
 479         gss_buffer_desc tok_out, tok_in;
 480         DATA_BLOB blob_out = data_blob_null;
 481         DATA_BLOB blob_in = data_blob_null;
 482         char *host_princ_s = NULL;
 483         OM_uint32 ret_flags = 0;
 484         NTSTATUS status = NT_STATUS_OK;
 485
 486         gss_OID_desc nt_hostbased_service =
 487         {10, CONST_DISCARD(char *,"\x2a\x86\x48\x86\xf7\x12\x01\x02\x01\x04")};
 488
 489         memset(&tok_out, '\0', sizeof(tok_out));
 490
 491         /* Get a ticket for the service@host */
 492         asprintf(&host_princ_s, "%s@%s", service, host);
 493         if (host_princ_s == NULL) {
 494                 return NT_STATUS_NO_MEMORY;
 495         }
 496
 497         input_name.value = host_princ_s;
 498         input_name.length = strlen(host_princ_s) + 1;
 499
 500         ret = gss_import_name(&min,
 501                                 &input_name,
 502                                 &nt_hostbased_service,
 503                                 &srv_name);
 504
 505         if (ret != GSS_S_COMPLETE) {
 506                 SAFE_FREE(host_princ_s);
 507                 return map_nt_error_from_gss(ret, min);
 508         }
 509
 510         if (spnego_blob_in.length == 0) {
 511                 p_tok_in = GSS_C_NO_BUFFER;
 512         } else {
 513                 /* Remove the SPNEGO wrapper */
 514                 if (!spnego_parse_auth_response(spnego_blob_in, status_in, OID_KERBEROS5, &blob_in)) {
 515                         status = NT_STATUS_UNSUCCESSFUL;
 516                         goto fail;
 517                 }
 518                 tok_in.value = blob_in.data;
 519                 tok_in.length = blob_in.length;
 520                 p_tok_in = &tok_in;
 521         }
 522
 523         ret = gss_init_sec_context(&min,
 524                                 GSS_C_NO_CREDENTIAL, /* Use our default cred. */
 525                                 &es->s.gss_state->gss_ctx,
 526                                 srv_name,
 527                                 GSS_C_NO_OID, /* default OID. */
 528                                 GSS_C_MUTUAL_FLAG | GSS_C_REPLAY_FLAG | GSS_C_SEQUENCE_FLAG,
 529                                 GSS_C_INDEFINITE,       /* requested ticket lifetime. */
 530                                 NULL,   /* no channel bindings */
 531                                 p_tok_in,
 532                                 NULL,   /* ignore mech type */
 533                                 &tok_out,
 534                                 &ret_flags,
 535                                 NULL);  /* ignore time_rec */
 536
 537         status = map_nt_error_from_gss(ret, min);
 538         if (!NT_STATUS_IS_OK(status) && !NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 539                 ADS_STATUS adss = ADS_ERROR_GSS(ret, min);
 540                 DEBUG(10,("make_cli_gss_blob: gss_init_sec_context failed with %s\n",
 541                         ads_errstr(adss)));
 542                 goto fail;
 543         }
 544
 545         if ((ret_flags & SMB_GSS_REQUIRED_FLAGS) != SMB_GSS_REQUIRED_FLAGS) {
 546                 status = NT_STATUS_ACCESS_DENIED;
 547         }
 548
 549         blob_out = data_blob(tok_out.value, tok_out.length);
 550
 551         /* Wrap in an SPNEGO wrapper */
 552         *p_blob_out = gen_negTokenTarg(krb_mechs, blob_out);
 553
 554   fail:
 555
 556         data_blob_free(&blob_out);
 557         data_blob_free(&blob_in);
 558         SAFE_FREE(host_princ_s);
 559         gss_release_name(&min, &srv_name);
 560         if (tok_out.value) {
 561                 gss_release_buffer(&min, &tok_out);
 562         }
 563         return status;
 564 }
 565
 566 /******************************************************************************
 567  Start a SPNEGO gssapi encryption context.
 568 ******************************************************************************/
 569
 570 NTSTATUS cli_gss_smb_encryption_start(struct cli_state *cli)
 571 {
 572         DATA_BLOB blob_recv = data_blob_null;
 573         DATA_BLOB blob_send = data_blob_null;
 574         DATA_BLOB param_out = data_blob_null;
 575         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
 576         fstring fqdn;
 577         const char *servicename;
 578         struct smb_trans_enc_state *es = make_cli_enc_state(SMB_TRANS_ENC_GSS);
 579
 580         if (!es) {
 581                 return NT_STATUS_NO_MEMORY;
 582         }
 583
 584         name_to_fqdn(fqdn, cli->desthost);
 585         strlower_m(fqdn);
 586
 587         servicename = "cifs";
 588         status = make_cli_gss_blob(es, servicename, fqdn, NT_STATUS_OK, blob_recv, &blob_send);
 589         if (!NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 590                 servicename = "host";
 591                 status = make_cli_gss_blob(es, servicename, fqdn, NT_STATUS_OK, blob_recv, &blob_send);
 592                 if (!NT_STATUS_EQUAL(status,NT_STATUS_MORE_PROCESSING_REQUIRED)) {
 593                         goto fail;
 594                 }
 595         }
 596
 597         do {
 598                 data_blob_free(&blob_recv);
 599                 status = enc_blob_send_receive(cli, &blob_send, &blob_recv, &param_out);
 600                 if (param_out.length == 2) {
 601                         es->enc_ctx_num = SVAL(param_out.data, 0);
 602                 }
 603                 data_blob_free(&blob_send);
 604                 status = make_cli_gss_blob(es, servicename, fqdn, status, blob_recv, &blob_send);
 605         } while (NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED));
 606         data_blob_free(&blob_recv);
 607
 608         if (NT_STATUS_IS_OK(status)) {
 609                 /* Replace the old state, if any. */
 610                 if (cli->trans_enc_state) {
 611                         common_free_encryption_state(&cli->trans_enc_state);
 612                 }
 613                 cli->trans_enc_state = es;
 614                 cli->trans_enc_state->enc_on = True;
 615                 es = NULL;
 616         }
 617
 618   fail:
 619
 620         common_free_encryption_state(&es);
 621         return status;
 622 }
 623 #else
 624 NTSTATUS cli_gss_smb_encryption_start(struct cli_state *cli)
 625 {
 626         return NT_STATUS_NOT_SUPPORTED;
 627 }
 628 #endif