source3/smbd/smb2_getinfo.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6    Copyright (C) Jeremy Allison 2010
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "smbd/smbd.h"
  24 #include "smbd/globals.h"
  25 #include "../libcli/smb/smb_common.h"
  26 #include "trans2.h"
  27 #include "../lib/util/tevent_ntstatus.h"
  28
  29 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
  30                                                  struct tevent_context *ev,
  31                                                  struct smbd_smb2_request *smb2req,
  32                                                  struct files_struct *in_fsp,
  33                                                  uint8_t in_info_type,
  34                                                  uint8_t in_file_info_class,
  35                                                  uint32_t in_output_buffer_length,
  36                                                  DATA_BLOB in_input_buffer,
  37                                                  uint32_t in_additional_information,
  38                                                  uint32_t in_flags);
  39 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
  40                                        TALLOC_CTX *mem_ctx,
  41                                        DATA_BLOB *out_output_buffer,
  42                                        NTSTATUS *p_call_status);
  43
  44 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq);
  45 NTSTATUS smbd_smb2_request_process_getinfo(struct smbd_smb2_request *req)
  46 {
  47         NTSTATUS status;
  48         const uint8_t *inbody;
  49         uint8_t in_info_type;
  50         uint8_t in_file_info_class;
  51         uint32_t in_output_buffer_length;
  52         uint16_t in_input_buffer_offset;
  53         uint32_t in_input_buffer_length;
  54         DATA_BLOB in_input_buffer;
  55         uint32_t in_additional_information;
  56         uint32_t in_flags;
  57         uint64_t in_file_id_persistent;
  58         uint64_t in_file_id_volatile;
  59         struct files_struct *in_fsp;
  60         struct tevent_req *subreq;
  61
  62         status = smbd_smb2_request_verify_sizes(req, 0x29);
  63         if (!NT_STATUS_IS_OK(status)) {
  64                 return smbd_smb2_request_error(req, status);
  65         }
  66         inbody = SMBD_SMB2_IN_BODY_PTR(req);
  67
  68         in_info_type                    = CVAL(inbody, 0x02);
  69         in_file_info_class              = CVAL(inbody, 0x03);
  70         in_output_buffer_length         = IVAL(inbody, 0x04);
  71         in_input_buffer_offset          = SVAL(inbody, 0x08);
  72         /* 0x0A 2 bytes reserved */
  73         in_input_buffer_length          = IVAL(inbody, 0x0C);
  74         in_additional_information       = IVAL(inbody, 0x10);
  75         in_flags                        = IVAL(inbody, 0x14);
  76         in_file_id_persistent           = BVAL(inbody, 0x18);
  77         in_file_id_volatile             = BVAL(inbody, 0x20);
  78
  79         if (in_input_buffer_offset == 0 && in_input_buffer_length == 0) {
  80                 /* This is ok */
  81         } else if (in_input_buffer_offset !=
  82                    (SMB2_HDR_BODY + SMBD_SMB2_IN_BODY_LEN(req))) {
  83                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  84         }
  85
  86         if (in_input_buffer_length > SMBD_SMB2_IN_DYN_LEN(req)) {
  87                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  88         }
  89
  90         in_input_buffer.data = SMBD_SMB2_IN_DYN_PTR(req);
  91         in_input_buffer.length = in_input_buffer_length;
  92
  93         if (in_input_buffer.length > req->sconn->smb2.max_trans) {
  94                 DEBUG(2,("smbd_smb2_request_process_getinfo: "
  95                          "client ignored max trans: %s: 0x%08X: 0x%08X\n",
  96                          __location__, (unsigned)in_input_buffer.length,
  97                          (unsigned)req->sconn->smb2.max_trans));
  98                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  99         }
 100         if (in_output_buffer_length > req->sconn->smb2.max_trans) {
 101                 DEBUG(2,("smbd_smb2_request_process_getinfo: "
 102                          "client ignored max trans: %s: 0x%08X: 0x%08X\n",
 103                          __location__, in_output_buffer_length,
 104                          req->sconn->smb2.max_trans));
 105                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 106         }
 107
 108         status = smbd_smb2_request_verify_creditcharge(req,
 109                         MAX(in_input_buffer.length,in_output_buffer_length));
 110         if (!NT_STATUS_IS_OK(status)) {
 111                 return smbd_smb2_request_error(req, status);
 112         }
 113
 114         in_fsp = file_fsp_smb2(req, in_file_id_persistent, in_file_id_volatile);
 115         if (in_fsp == NULL) {
 116                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
 117         }
 118
 119         subreq = smbd_smb2_getinfo_send(req, req->sconn->ev_ctx,
 120                                         req, in_fsp,
 121                                         in_info_type,
 122                                         in_file_info_class,
 123                                         in_output_buffer_length,
 124                                         in_input_buffer,
 125                                         in_additional_information,
 126                                         in_flags);
 127         if (subreq == NULL) {
 128                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 129         }
 130         tevent_req_set_callback(subreq, smbd_smb2_request_getinfo_done, req);
 131
 132         return smbd_smb2_request_pending_queue(req, subreq, 500);
 133 }
 134
 135 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq)
 136 {
 137         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 138                                         struct smbd_smb2_request);
 139         DATA_BLOB outbody;
 140         DATA_BLOB outdyn;
 141         uint16_t out_output_buffer_offset;
 142         DATA_BLOB out_output_buffer = data_blob_null;
 143         NTSTATUS status;
 144         NTSTATUS call_status = NT_STATUS_OK;
 145         NTSTATUS error; /* transport error */
 146
 147         status = smbd_smb2_getinfo_recv(subreq,
 148                                         req,
 149                                         &out_output_buffer,
 150                                         &call_status);
 151         TALLOC_FREE(subreq);
 152         if (!NT_STATUS_IS_OK(status)) {
 153                 error = smbd_smb2_request_error(req, status);
 154                 if (!NT_STATUS_IS_OK(error)) {
 155                         smbd_server_connection_terminate(req->sconn,
 156                                                          nt_errstr(error));
 157                         return;
 158                 }
 159                 return;
 160         }
 161
 162         /* some GetInfo responses set STATUS_BUFFER_OVERFLOW and return partial,
 163            but valid data */
 164         if (!(NT_STATUS_IS_OK(call_status) ||
 165               NT_STATUS_EQUAL(call_status, STATUS_BUFFER_OVERFLOW))) {
 166                 /* Return a specific error with data. */
 167                 error = smbd_smb2_request_error_ex(req,
 168                                                 call_status,
 169                                                 &out_output_buffer,
 170                                                 __location__);
 171                 if (!NT_STATUS_IS_OK(error)) {
 172                         smbd_server_connection_terminate(req->sconn,
 173                                                          nt_errstr(error));
 174                         return;
 175                 }
 176                 return;
 177         }
 178
 179         out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
 180
 181         outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
 182         if (outbody.data == NULL) {
 183                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 184                 if (!NT_STATUS_IS_OK(error)) {
 185                         smbd_server_connection_terminate(req->sconn,
 186                                                          nt_errstr(error));
 187                         return;
 188                 }
 189                 return;
 190         }
 191
 192         SSVAL(outbody.data, 0x00, 0x08 + 1);    /* struct size */
 193         SSVAL(outbody.data, 0x02,
 194               out_output_buffer_offset);        /* output buffer offset */
 195         SIVAL(outbody.data, 0x04,
 196               out_output_buffer.length);        /* output buffer length */
 197
 198         outdyn = out_output_buffer;
 199
 200         error = smbd_smb2_request_done_ex(req, call_status, outbody, &outdyn, __location__);
 201         if (!NT_STATUS_IS_OK(error)) {
 202                 smbd_server_connection_terminate(req->sconn,
 203                                                  nt_errstr(error));
 204                 return;
 205         }
 206 }
 207
 208 struct smbd_smb2_getinfo_state {
 209         struct smbd_smb2_request *smb2req;
 210         NTSTATUS status;
 211         DATA_BLOB out_output_buffer;
 212 };
 213
 214 static void smb2_ipc_getinfo(struct tevent_req *req,
 215                                 struct smbd_smb2_getinfo_state *state,
 216                                 struct tevent_context *ev,
 217                                 uint8_t in_info_type,
 218                                 uint8_t in_file_info_class)
 219 {
 220         /* We want to reply to SMB2_GETINFO_FILE
 221            with a class of SMB2_FILE_STANDARD_INFO as
 222            otherwise a Win7 client issues this request
 223            twice (2xroundtrips) if we return NOT_SUPPORTED.
 224            NB. We do the same for SMB1 in call_trans2qpipeinfo() */
 225
 226         if (in_info_type == 0x01 && /* SMB2_GETINFO_FILE */
 227                         in_file_info_class == 0x05) { /* SMB2_FILE_STANDARD_INFO */
 228                 state->out_output_buffer = data_blob_talloc(state,
 229                                                 NULL, 24);
 230                 if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 231                         return;
 232                 }
 233
 234                 memset(state->out_output_buffer.data,0,24);
 235                 SOFF_T(state->out_output_buffer.data,0,4096LL);
 236                 SIVAL(state->out_output_buffer.data,16,1);
 237                 SIVAL(state->out_output_buffer.data,20,1);
 238                 tevent_req_done(req);
 239         } else {
 240                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 241         }
 242 }
 243
 244 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
 245                                                  struct tevent_context *ev,
 246                                                  struct smbd_smb2_request *smb2req,
 247                                                  struct files_struct *fsp,
 248                                                  uint8_t in_info_type,
 249                                                  uint8_t in_file_info_class,
 250                                                  uint32_t in_output_buffer_length,
 251                                                  DATA_BLOB in_input_buffer,
 252                                                  uint32_t in_additional_information,
 253                                                  uint32_t in_flags)
 254 {
 255         struct tevent_req *req;
 256         struct smbd_smb2_getinfo_state *state;
 257         struct smb_request *smbreq;
 258         connection_struct *conn = smb2req->tcon->compat;
 259         NTSTATUS status;
 260
 261         req = tevent_req_create(mem_ctx, &state,
 262                                 struct smbd_smb2_getinfo_state);
 263         if (req == NULL) {
 264                 return NULL;
 265         }
 266         state->smb2req = smb2req;
 267         state->status = NT_STATUS_OK;
 268         state->out_output_buffer = data_blob_null;
 269
 270         DEBUG(10,("smbd_smb2_getinfo_send: %s - %s\n",
 271                   fsp_str_dbg(fsp), fsp_fnum_dbg(fsp)));
 272
 273         smbreq = smbd_smb2_fake_smb_request(smb2req);
 274         if (tevent_req_nomem(smbreq, req)) {
 275                 return tevent_req_post(req, ev);
 276         }
 277
 278         if (IS_IPC(conn)) {
 279                 smb2_ipc_getinfo(req, state, ev,
 280                         in_info_type, in_file_info_class);
 281                 return tevent_req_post(req, ev);
 282         }
 283
 284         switch (in_info_type) {
 285         case SMB2_GETINFO_FILE:
 286         {
 287                 uint16_t file_info_level;
 288                 char *data = NULL;
 289                 unsigned int data_size = 0;
 290                 bool delete_pending = false;
 291                 struct timespec write_time_ts;
 292                 struct file_id fileid;
 293                 struct ea_list *ea_list = NULL;
 294                 int lock_data_count = 0;
 295                 char *lock_data = NULL;
 296                 size_t fixed_portion;
 297
 298                 ZERO_STRUCT(write_time_ts);
 299
 300                 switch (in_file_info_class) {
 301                 case 0x0F:/* RAW_FILEINFO_SMB2_ALL_EAS */
 302                         file_info_level = 0xFF00 | in_file_info_class;
 303                         break;
 304
 305                 case 0x12:/* RAW_FILEINFO_SMB2_ALL_INFORMATION */
 306                         file_info_level = 0xFF00 | in_file_info_class;
 307                         break;
 308
 309                 default:
 310                         /* the levels directly map to the passthru levels */
 311                         file_info_level = in_file_info_class + 1000;
 312                         break;
 313                 }
 314
 315                 if (fsp->fake_file_handle) {
 316                         /*
 317                          * This is actually for the QUOTA_FAKE_FILE --metze
 318                          */
 319
 320                         /* We know this name is ok, it's already passed the checks. */
 321
 322                 } else if (fsp->fh->fd == -1) {
 323                         /*
 324                          * This is actually a QFILEINFO on a directory
 325                          * handle (returned from an NT SMB). NT5.0 seems
 326                          * to do this call. JRA.
 327                          */
 328
 329                         if (INFO_LEVEL_IS_UNIX(file_info_level)) {
 330                                 /* Always do lstat for UNIX calls. */
 331                                 if (SMB_VFS_LSTAT(conn, fsp->fsp_name)) {
 332                                         DEBUG(3,("smbd_smb2_getinfo_send: "
 333                                                  "SMB_VFS_LSTAT of %s failed "
 334                                                  "(%s)\n", fsp_str_dbg(fsp),
 335                                                  strerror(errno)));
 336                                         status = map_nt_error_from_unix(errno);
 337                                         tevent_req_nterror(req, status);
 338                                         return tevent_req_post(req, ev);
 339                                 }
 340                         } else if (SMB_VFS_STAT(conn, fsp->fsp_name)) {
 341                                 DEBUG(3,("smbd_smb2_getinfo_send: "
 342                                          "SMB_VFS_STAT of %s failed (%s)\n",
 343                                          fsp_str_dbg(fsp),
 344                                          strerror(errno)));
 345                                 status = map_nt_error_from_unix(errno);
 346                                 tevent_req_nterror(req, status);
 347                                 return tevent_req_post(req, ev);
 348                         }
 349
 350                         fileid = vfs_file_id_from_sbuf(conn,
 351                                                        &fsp->fsp_name->st);
 352                         get_file_infos(fileid, fsp->name_hash,
 353                                 &delete_pending, &write_time_ts);
 354                 } else {
 355                         /*
 356                          * Original code - this is an open file.
 357                          */
 358
 359                         if (SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
 360                                 DEBUG(3, ("smbd_smb2_getinfo_send: "
 361                                           "fstat of %s failed (%s)\n",
 362                                           fsp_fnum_dbg(fsp), strerror(errno)));
 363                                 status = map_nt_error_from_unix(errno);
 364                                 tevent_req_nterror(req, status);
 365                                 return tevent_req_post(req, ev);
 366                         }
 367                         fileid = vfs_file_id_from_sbuf(conn,
 368                                                        &fsp->fsp_name->st);
 369                         get_file_infos(fileid, fsp->name_hash,
 370                                 &delete_pending, &write_time_ts);
 371                 }
 372
 373                 status = smbd_do_qfilepathinfo(conn, state,
 374                                                file_info_level,
 375                                                fsp,
 376                                                fsp->fsp_name,
 377                                                delete_pending,
 378                                                write_time_ts,
 379                                                ea_list,
 380                                                lock_data_count,
 381                                                lock_data,
 382                                                STR_UNICODE,
 383                                                in_output_buffer_length,
 384                                                &fixed_portion,
 385                                                &data,
 386                                                &data_size);
 387                 if (!NT_STATUS_IS_OK(status)) {
 388                         SAFE_FREE(data);
 389                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 390                                 status = NT_STATUS_INVALID_INFO_CLASS;
 391                         }
 392                         tevent_req_nterror(req, status);
 393                         return tevent_req_post(req, ev);
 394                 }
 395                 if (in_output_buffer_length < fixed_portion) {
 396                         SAFE_FREE(data);
 397                         tevent_req_nterror(
 398                                 req, NT_STATUS_INFO_LENGTH_MISMATCH);
 399                         return tevent_req_post(req, ev);
 400                 }
 401                 if (data_size > 0) {
 402                         state->out_output_buffer = data_blob_talloc(state,
 403                                                                     data,
 404                                                                     data_size);
 405                         SAFE_FREE(data);
 406                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 407                                 return tevent_req_post(req, ev);
 408                         }
 409                         if (data_size > in_output_buffer_length) {
 410                                 state->out_output_buffer.length =
 411                                         in_output_buffer_length;
 412                                 status = STATUS_BUFFER_OVERFLOW;
 413                         }
 414                 }
 415                 SAFE_FREE(data);
 416                 break;
 417         }
 418
 419         case SMB2_GETINFO_FS:
 420         {
 421                 uint16_t file_info_level;
 422                 char *data = NULL;
 423                 int data_size = 0;
 424                 size_t fixed_portion;
 425
 426                 /* the levels directly map to the passthru levels */
 427                 file_info_level = in_file_info_class + 1000;
 428
 429                 status = smbd_do_qfsinfo(conn, state,
 430                                          file_info_level,
 431                                          STR_UNICODE,
 432                                          in_output_buffer_length,
 433                                          &fixed_portion,
 434                                          fsp->fsp_name,
 435                                          &data,
 436                                          &data_size);
 437                 /* some responses set STATUS_BUFFER_OVERFLOW and return
 438                    partial, but valid data */
 439                 if (!(NT_STATUS_IS_OK(status) ||
 440                       NT_STATUS_EQUAL(status, STATUS_BUFFER_OVERFLOW))) {
 441                         SAFE_FREE(data);
 442                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 443                                 status = NT_STATUS_INVALID_INFO_CLASS;
 444                         }
 445                         tevent_req_nterror(req, status);
 446                         return tevent_req_post(req, ev);
 447                 }
 448                 if (in_output_buffer_length < fixed_portion) {
 449                         SAFE_FREE(data);
 450                         tevent_req_nterror(
 451                                 req, NT_STATUS_INFO_LENGTH_MISMATCH);
 452                         return tevent_req_post(req, ev);
 453                 }
 454                 if (data_size > 0) {
 455                         state->out_output_buffer = data_blob_talloc(state,
 456                                                                     data,
 457                                                                     data_size);
 458                         SAFE_FREE(data);
 459                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 460                                 return tevent_req_post(req, ev);
 461                         }
 462                         if (data_size > in_output_buffer_length) {
 463                                 state->out_output_buffer.length =
 464                                         in_output_buffer_length;
 465                                 status = STATUS_BUFFER_OVERFLOW;
 466                         }
 467                 }
 468                 SAFE_FREE(data);
 469                 break;
 470         }
 471
 472         case SMB2_GETINFO_SECURITY:
 473         {
 474                 uint8_t *p_marshalled_sd = NULL;
 475                 size_t sd_size = 0;
 476
 477                 status = smbd_do_query_security_desc(conn,
 478                                 state,
 479                                 fsp,
 480                                 /* Security info wanted. */
 481                                 in_additional_information,
 482                                 in_output_buffer_length,
 483                                 &p_marshalled_sd,
 484                                 &sd_size);
 485
 486                 if (NT_STATUS_EQUAL(status, NT_STATUS_BUFFER_TOO_SMALL)) {
 487                         /* Return needed size. */
 488                         state->out_output_buffer = data_blob_talloc(state,
 489                                                                     NULL,
 490                                                                     4);
 491                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 492                                 return tevent_req_post(req, ev);
 493                         }
 494                         SIVAL(state->out_output_buffer.data,0,(uint32_t)sd_size);
 495                         state->status = NT_STATUS_BUFFER_TOO_SMALL;
 496                         break;
 497                 }
 498                 if (!NT_STATUS_IS_OK(status)) {
 499                         DEBUG(10,("smbd_smb2_getinfo_send: "
 500                                  "smbd_do_query_security_desc of %s failed "
 501                                  "(%s)\n", fsp_str_dbg(fsp),
 502                                  nt_errstr(status)));
 503                         tevent_req_nterror(req, status);
 504                         return tevent_req_post(req, ev);
 505                 }
 506
 507                 if (sd_size > 0) {
 508                         state->out_output_buffer = data_blob_talloc(state,
 509                                                                     p_marshalled_sd,
 510                                                                     sd_size);
 511                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 512                                 return tevent_req_post(req, ev);
 513                         }
 514                 }
 515                 break;
 516         }
 517
 518         case SMB2_GETINFO_QUOTA:
 519                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 520                 return tevent_req_post(req, ev);
 521
 522         default:
 523                 DEBUG(10,("smbd_smb2_getinfo_send: "
 524                         "unknown in_info_type of %u "
 525                         " for file %s\n",
 526                         (unsigned int)in_info_type,
 527                         fsp_str_dbg(fsp) ));
 528
 529                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 530                 return tevent_req_post(req, ev);
 531         }
 532
 533         state->status = status;
 534         tevent_req_done(req);
 535         return tevent_req_post(req, ev);
 536 }
 537
 538 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
 539                                        TALLOC_CTX *mem_ctx,
 540                                        DATA_BLOB *out_output_buffer,
 541                                        NTSTATUS *pstatus)
 542 {
 543         NTSTATUS status;
 544         struct smbd_smb2_getinfo_state *state = tevent_req_data(req,
 545                                                 struct smbd_smb2_getinfo_state);
 546
 547         if (tevent_req_is_nterror(req, &status)) {
 548                 tevent_req_received(req);
 549                 return status;
 550         }
 551
 552         *out_output_buffer = state->out_output_buffer;
 553         talloc_steal(mem_ctx, out_output_buffer->data);
 554         *pstatus = state->status;
 555
 556         tevent_req_received(req);
 557         return NT_STATUS_OK;
 558 }