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                                                  uint8_t in_info_type,
  33                                                  uint8_t in_file_info_class,
  34                                                  uint32_t in_output_buffer_length,
  35                                                  DATA_BLOB in_input_buffer,
  36                                                  uint32_t in_additional_information,
  37                                                  uint32_t in_flags,
  38                                                  uint64_t in_file_id_volatile);
  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         int i = req->current_idx;
  50         uint8_t in_info_type;
  51         uint8_t in_file_info_class;
  52         uint32_t in_output_buffer_length;
  53         uint16_t in_input_buffer_offset;
  54         uint32_t in_input_buffer_length;
  55         DATA_BLOB in_input_buffer;
  56         uint32_t in_additional_information;
  57         uint32_t in_flags;
  58         uint64_t in_file_id_persistent;
  59         uint64_t in_file_id_volatile;
  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 = (const uint8_t *)req->in.vector[i+1].iov_base;
  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 + req->in.vector[i+1].iov_len)) {
  83                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  84         }
  85
  86         if (in_input_buffer_length > req->in.vector[i+2].iov_len) {
  87                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  88         }
  89
  90         in_input_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
  91         in_input_buffer.length = in_input_buffer_length;
  92
  93         if (in_input_buffer.length > req->sconn->smb2.max_trans) {
  94                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  95         }
  96         if (in_output_buffer_length > req->sconn->smb2.max_trans) {
  97                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  98         }
  99
 100         if (req->compat_chain_fsp) {
 101                 /* skip check */
 102         } else if (in_file_id_persistent != in_file_id_volatile) {
 103                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
 104         }
 105
 106         subreq = smbd_smb2_getinfo_send(req,
 107                                         req->sconn->smb2.event_ctx,
 108                                         req,
 109                                         in_info_type,
 110                                         in_file_info_class,
 111                                         in_output_buffer_length,
 112                                         in_input_buffer,
 113                                         in_additional_information,
 114                                         in_flags,
 115                                         in_file_id_volatile);
 116         if (subreq == NULL) {
 117                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 118         }
 119         tevent_req_set_callback(subreq, smbd_smb2_request_getinfo_done, req);
 120
 121         return smbd_smb2_request_pending_queue(req, subreq);
 122 }
 123
 124 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq)
 125 {
 126         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 127                                         struct smbd_smb2_request);
 128         int i = req->current_idx;
 129         uint8_t *outhdr;
 130         DATA_BLOB outbody;
 131         DATA_BLOB outdyn;
 132         uint16_t out_output_buffer_offset;
 133         DATA_BLOB out_output_buffer = data_blob_null;
 134         NTSTATUS status;
 135         NTSTATUS call_status = NT_STATUS_OK;
 136         NTSTATUS error; /* transport error */
 137
 138         status = smbd_smb2_getinfo_recv(subreq,
 139                                         req,
 140                                         &out_output_buffer,
 141                                         &call_status);
 142         TALLOC_FREE(subreq);
 143         if (!NT_STATUS_IS_OK(status)) {
 144                 error = smbd_smb2_request_error(req, status);
 145                 if (!NT_STATUS_IS_OK(error)) {
 146                         smbd_server_connection_terminate(req->sconn,
 147                                                          nt_errstr(error));
 148                         return;
 149                 }
 150                 return;
 151         }
 152
 153         if (!NT_STATUS_IS_OK(call_status)) {
 154                 /* Return a specific error with data. */
 155                 error = smbd_smb2_request_error_ex(req,
 156                                                 call_status,
 157                                                 &out_output_buffer,
 158                                                 __location__);
 159                 if (!NT_STATUS_IS_OK(error)) {
 160                         smbd_server_connection_terminate(req->sconn,
 161                                                          nt_errstr(error));
 162                         return;
 163                 }
 164                 return;
 165         }
 166
 167         out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
 168
 169         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 170
 171         outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
 172         if (outbody.data == NULL) {
 173                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 174                 if (!NT_STATUS_IS_OK(error)) {
 175                         smbd_server_connection_terminate(req->sconn,
 176                                                          nt_errstr(error));
 177                         return;
 178                 }
 179                 return;
 180         }
 181
 182         SSVAL(outbody.data, 0x00, 0x08 + 1);    /* struct size */
 183         SSVAL(outbody.data, 0x02,
 184               out_output_buffer_offset);        /* output buffer offset */
 185         SIVAL(outbody.data, 0x04,
 186               out_output_buffer.length);        /* output buffer length */
 187
 188         outdyn = out_output_buffer;
 189
 190         error = smbd_smb2_request_done(req, outbody, &outdyn);
 191         if (!NT_STATUS_IS_OK(error)) {
 192                 smbd_server_connection_terminate(req->sconn,
 193                                                  nt_errstr(error));
 194                 return;
 195         }
 196 }
 197
 198 struct smbd_smb2_getinfo_state {
 199         struct smbd_smb2_request *smb2req;
 200         NTSTATUS status;
 201         DATA_BLOB out_output_buffer;
 202 };
 203
 204 static void smb2_ipc_getinfo(struct tevent_req *req,
 205                                 struct smbd_smb2_getinfo_state *state,
 206                                 struct tevent_context *ev,
 207                                 uint8_t in_info_type,
 208                                 uint8_t in_file_info_class)
 209 {
 210         /* We want to reply to SMB2_GETINFO_FILE
 211            with a class of SMB2_FILE_STANDARD_INFO as
 212            otherwise a Win7 client issues this request
 213            twice (2xroundtrips) if we return NOT_SUPPORTED.
 214            NB. We do the same for SMB1 in call_trans2qpipeinfo() */
 215
 216         if (in_info_type == 0x01 && /* SMB2_GETINFO_FILE */
 217                         in_file_info_class == 0x05) { /* SMB2_FILE_STANDARD_INFO */
 218                 state->out_output_buffer = data_blob_talloc(state,
 219                                                 NULL, 24);
 220                 if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 221                         return;
 222                 }
 223
 224                 memset(state->out_output_buffer.data,0,24);
 225                 SOFF_T(state->out_output_buffer.data,0,4096LL);
 226                 SIVAL(state->out_output_buffer.data,16,1);
 227                 SIVAL(state->out_output_buffer.data,20,1);
 228                 tevent_req_done(req);
 229         } else {
 230                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 231         }
 232 }
 233
 234 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
 235                                                  struct tevent_context *ev,
 236                                                  struct smbd_smb2_request *smb2req,
 237                                                  uint8_t in_info_type,
 238                                                  uint8_t in_file_info_class,
 239                                                  uint32_t in_output_buffer_length,
 240                                                  DATA_BLOB in_input_buffer,
 241                                                  uint32_t in_additional_information,
 242                                                  uint32_t in_flags,
 243                                                  uint64_t in_file_id_volatile)
 244 {
 245         struct tevent_req *req;
 246         struct smbd_smb2_getinfo_state *state;
 247         struct smb_request *smbreq;
 248         connection_struct *conn = smb2req->tcon->compat_conn;
 249         files_struct *fsp;
 250         NTSTATUS status;
 251
 252         req = tevent_req_create(mem_ctx, &state,
 253                                 struct smbd_smb2_getinfo_state);
 254         if (req == NULL) {
 255                 return NULL;
 256         }
 257         state->smb2req = smb2req;
 258         state->status = NT_STATUS_OK;
 259         state->out_output_buffer = data_blob_null;
 260
 261         DEBUG(10,("smbd_smb2_getinfo_send: file_id[0x%016llX]\n",
 262                   (unsigned long long)in_file_id_volatile));
 263
 264         smbreq = smbd_smb2_fake_smb_request(smb2req);
 265         if (tevent_req_nomem(smbreq, req)) {
 266                 return tevent_req_post(req, ev);
 267         }
 268
 269         fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
 270         if (fsp == NULL) {
 271                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 272                 return tevent_req_post(req, ev);
 273         }
 274         if (conn != fsp->conn) {
 275                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 276                 return tevent_req_post(req, ev);
 277         }
 278         if (smb2req->session->vuid != fsp->vuid) {
 279                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 280                 return tevent_req_post(req, ev);
 281         }
 282
 283         if (IS_IPC(conn)) {
 284                 smb2_ipc_getinfo(req, state, ev,
 285                         in_info_type, in_file_info_class);
 286                 return tevent_req_post(req, ev);
 287         }
 288
 289         switch (in_info_type) {
 290         case 0x01:/* SMB2_GETINFO_FILE */
 291         {
 292                 uint16_t file_info_level;
 293                 char *data = NULL;
 294                 unsigned int data_size = 0;
 295                 bool delete_pending = false;
 296                 struct timespec write_time_ts;
 297                 struct file_id fileid;
 298                 struct ea_list *ea_list = NULL;
 299                 int lock_data_count = 0;
 300                 char *lock_data = NULL;
 301
 302                 ZERO_STRUCT(write_time_ts);
 303
 304                 switch (in_file_info_class) {
 305                 case 0x0F:/* RAW_FILEINFO_SMB2_ALL_EAS */
 306                         file_info_level = 0xFF00 | in_file_info_class;
 307                         break;
 308
 309                 case 0x12:/* RAW_FILEINFO_SMB2_ALL_INFORMATION */
 310                         file_info_level = 0xFF00 | in_file_info_class;
 311                         break;
 312
 313                 default:
 314                         /* the levels directly map to the passthru levels */
 315                         file_info_level = in_file_info_class + 1000;
 316                         break;
 317                 }
 318
 319                 if (fsp->fake_file_handle) {
 320                         /*
 321                          * This is actually for the QUOTA_FAKE_FILE --metze
 322                          */
 323
 324                         /* We know this name is ok, it's already passed the checks. */
 325
 326                 } else if (fsp && fsp->fh->fd == -1) {
 327                         /*
 328                          * This is actually a QFILEINFO on a directory
 329                          * handle (returned from an NT SMB). NT5.0 seems
 330                          * to do this call. JRA.
 331                          */
 332
 333                         if (INFO_LEVEL_IS_UNIX(file_info_level)) {
 334                                 /* Always do lstat for UNIX calls. */
 335                                 if (SMB_VFS_LSTAT(conn, fsp->fsp_name)) {
 336                                         DEBUG(3,("smbd_smb2_getinfo_send: "
 337                                                  "SMB_VFS_LSTAT of %s failed "
 338                                                  "(%s)\n", fsp_str_dbg(fsp),
 339                                                  strerror(errno)));
 340                                         status = map_nt_error_from_unix(errno);
 341                                         tevent_req_nterror(req, status);
 342                                         return tevent_req_post(req, ev);
 343                                 }
 344                         } else if (SMB_VFS_STAT(conn, fsp->fsp_name)) {
 345                                 DEBUG(3,("smbd_smb2_getinfo_send: "
 346                                          "SMB_VFS_STAT of %s failed (%s)\n",
 347                                          fsp_str_dbg(fsp),
 348                                          strerror(errno)));
 349                                 status = map_nt_error_from_unix(errno);
 350                                 tevent_req_nterror(req, status);
 351                                 return tevent_req_post(req, ev);
 352                         }
 353
 354                         fileid = vfs_file_id_from_sbuf(conn,
 355                                                        &fsp->fsp_name->st);
 356                         get_file_infos(fileid, fsp->name_hash,
 357                                 &delete_pending, &write_time_ts);
 358                 } else {
 359                         /*
 360                          * Original code - this is an open file.
 361                          */
 362
 363                         if (SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
 364                                 DEBUG(3, ("smbd_smb2_getinfo_send: "
 365                                           "fstat of fnum %d failed (%s)\n",
 366                                           fsp->fnum, strerror(errno)));
 367                                 status = map_nt_error_from_unix(errno);
 368                                 tevent_req_nterror(req, status);
 369                                 return tevent_req_post(req, ev);
 370                         }
 371                         fileid = vfs_file_id_from_sbuf(conn,
 372                                                        &fsp->fsp_name->st);
 373                         get_file_infos(fileid, fsp->name_hash,
 374                                 &delete_pending, &write_time_ts);
 375                 }
 376
 377                 status = smbd_do_qfilepathinfo(conn, state,
 378                                                file_info_level,
 379                                                fsp,
 380                                                fsp->fsp_name,
 381                                                delete_pending,
 382                                                write_time_ts,
 383                                                ea_list,
 384                                                lock_data_count,
 385                                                lock_data,
 386                                                STR_UNICODE,
 387                                                in_output_buffer_length,
 388                                                &data,
 389                                                &data_size);
 390                 if (!NT_STATUS_IS_OK(status)) {
 391                         SAFE_FREE(data);
 392                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 393                                 status = NT_STATUS_INVALID_INFO_CLASS;
 394                         }
 395                         tevent_req_nterror(req, status);
 396                         return tevent_req_post(req, ev);
 397                 }
 398                 if (data_size > 0) {
 399                         state->out_output_buffer = data_blob_talloc(state,
 400                                                                     data,
 401                                                                     data_size);
 402                         SAFE_FREE(data);
 403                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 404                                 return tevent_req_post(req, ev);
 405                         }
 406                 }
 407                 SAFE_FREE(data);
 408                 break;
 409         }
 410
 411         case 0x02:/* SMB2_GETINFO_FS */
 412         {
 413                 uint16_t file_info_level;
 414                 char *data = NULL;
 415                 int data_size = 0;
 416
 417                 /* the levels directly map to the passthru levels */
 418                 file_info_level = in_file_info_class + 1000;
 419
 420                 status = smbd_do_qfsinfo(conn, state,
 421                                          file_info_level,
 422                                          STR_UNICODE,
 423                                          in_output_buffer_length,
 424                                          &data,
 425                                          &data_size);
 426                 if (!NT_STATUS_IS_OK(status)) {
 427                         SAFE_FREE(data);
 428                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 429                                 status = NT_STATUS_INVALID_INFO_CLASS;
 430                         }
 431                         tevent_req_nterror(req, status);
 432                         return tevent_req_post(req, ev);
 433                 }
 434                 if (data_size > 0) {
 435                         state->out_output_buffer = data_blob_talloc(state,
 436                                                                     data,
 437                                                                     data_size);
 438                         SAFE_FREE(data);
 439                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 440                                 return tevent_req_post(req, ev);
 441                         }
 442                 }
 443                 SAFE_FREE(data);
 444                 break;
 445         }
 446
 447         case 0x03:/* SMB2_GETINFO_SEC */
 448         {
 449                 uint8_t *p_marshalled_sd = NULL;
 450                 size_t sd_size = 0;
 451
 452                 status = smbd_do_query_security_desc(conn,
 453                                 state,
 454                                 fsp,
 455                                 /* Security info wanted. */
 456                                 in_additional_information,
 457                                 in_output_buffer_length,
 458                                 &p_marshalled_sd,
 459                                 &sd_size);
 460
 461                 if (NT_STATUS_EQUAL(status, NT_STATUS_BUFFER_TOO_SMALL)) {
 462                         /* Return needed size. */
 463                         state->out_output_buffer = data_blob_talloc(state,
 464                                                                     NULL,
 465                                                                     4);
 466                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 467                                 return tevent_req_post(req, ev);
 468                         }
 469                         SIVAL(state->out_output_buffer.data,0,(uint32_t)sd_size);
 470                         state->status = NT_STATUS_BUFFER_TOO_SMALL;
 471                         break;
 472                 }
 473                 if (!NT_STATUS_IS_OK(status)) {
 474                         DEBUG(10,("smbd_smb2_getinfo_send: "
 475                                  "smbd_do_query_security_desc of %s failed "
 476                                  "(%s)\n", fsp_str_dbg(fsp),
 477                                  nt_errstr(status)));
 478                         tevent_req_nterror(req, status);
 479                         return tevent_req_post(req, ev);
 480                 }
 481
 482                 if (sd_size > 0) {
 483                         state->out_output_buffer = data_blob_talloc(state,
 484                                                                     p_marshalled_sd,
 485                                                                     sd_size);
 486                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 487                                 return tevent_req_post(req, ev);
 488                         }
 489                 }
 490                 break;
 491         }
 492
 493         default:
 494                 DEBUG(10,("smbd_smb2_getinfo_send: "
 495                         "unknown in_info_type of %u "
 496                         " for file %s\n",
 497                         (unsigned int)in_info_type,
 498                         fsp_str_dbg(fsp) ));
 499
 500                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 501                 return tevent_req_post(req, ev);
 502         }
 503
 504         tevent_req_done(req);
 505         return tevent_req_post(req, ev);
 506 }
 507
 508 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
 509                                        TALLOC_CTX *mem_ctx,
 510                                        DATA_BLOB *out_output_buffer,
 511                                        NTSTATUS *pstatus)
 512 {
 513         NTSTATUS status;
 514         struct smbd_smb2_getinfo_state *state = tevent_req_data(req,
 515                                                 struct smbd_smb2_getinfo_state);
 516
 517         if (tevent_req_is_nterror(req, &status)) {
 518                 tevent_req_received(req);
 519                 return status;
 520         }
 521
 522         *out_output_buffer = state->out_output_buffer;
 523         talloc_steal(mem_ctx, out_output_buffer->data);
 524         *pstatus = state->status;
 525
 526         tevent_req_received(req);
 527         return NT_STATUS_OK;
 528 }