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                 DEBUG(2,("smbd_smb2_request_process_getinfo: "
  95                          "client ignored max trans: %s: 0x%08X: 0x%08X\n",
  96                          __location__, in_input_buffer.length,
  97                          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         if (req->compat_chain_fsp) {
 115                 /* skip check */
 116         } else if (in_file_id_persistent != in_file_id_volatile) {
 117                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
 118         }
 119
 120         subreq = smbd_smb2_getinfo_send(req,
 121                                         req->sconn->ev_ctx,
 122                                         req,
 123                                         in_info_type,
 124                                         in_file_info_class,
 125                                         in_output_buffer_length,
 126                                         in_input_buffer,
 127                                         in_additional_information,
 128                                         in_flags,
 129                                         in_file_id_volatile);
 130         if (subreq == NULL) {
 131                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 132         }
 133         tevent_req_set_callback(subreq, smbd_smb2_request_getinfo_done, req);
 134
 135         return smbd_smb2_request_pending_queue(req, subreq, 500);
 136 }
 137
 138 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq)
 139 {
 140         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 141                                         struct smbd_smb2_request);
 142         DATA_BLOB outbody;
 143         DATA_BLOB outdyn;
 144         uint16_t out_output_buffer_offset;
 145         DATA_BLOB out_output_buffer = data_blob_null;
 146         NTSTATUS status;
 147         NTSTATUS call_status = NT_STATUS_OK;
 148         NTSTATUS error; /* transport error */
 149
 150         status = smbd_smb2_getinfo_recv(subreq,
 151                                         req,
 152                                         &out_output_buffer,
 153                                         &call_status);
 154         TALLOC_FREE(subreq);
 155         if (!NT_STATUS_IS_OK(status)) {
 156                 error = smbd_smb2_request_error(req, status);
 157                 if (!NT_STATUS_IS_OK(error)) {
 158                         smbd_server_connection_terminate(req->sconn,
 159                                                          nt_errstr(error));
 160                         return;
 161                 }
 162                 return;
 163         }
 164
 165         if (!NT_STATUS_IS_OK(call_status)) {
 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(req, outbody, &outdyn);
 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                                                  uint8_t in_info_type,
 248                                                  uint8_t in_file_info_class,
 249                                                  uint32_t in_output_buffer_length,
 250                                                  DATA_BLOB in_input_buffer,
 251                                                  uint32_t in_additional_information,
 252                                                  uint32_t in_flags,
 253                                                  uint64_t in_file_id_volatile)
 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_conn;
 259         files_struct *fsp;
 260         NTSTATUS status;
 261
 262         req = tevent_req_create(mem_ctx, &state,
 263                                 struct smbd_smb2_getinfo_state);
 264         if (req == NULL) {
 265                 return NULL;
 266         }
 267         state->smb2req = smb2req;
 268         state->status = NT_STATUS_OK;
 269         state->out_output_buffer = data_blob_null;
 270
 271         DEBUG(10,("smbd_smb2_getinfo_send: file_id[0x%016llX]\n",
 272                   (unsigned long long)in_file_id_volatile));
 273
 274         smbreq = smbd_smb2_fake_smb_request(smb2req);
 275         if (tevent_req_nomem(smbreq, req)) {
 276                 return tevent_req_post(req, ev);
 277         }
 278
 279         fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
 280         if (fsp == NULL) {
 281                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 282                 return tevent_req_post(req, ev);
 283         }
 284         if (conn != fsp->conn) {
 285                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 286                 return tevent_req_post(req, ev);
 287         }
 288         if (smb2req->session->vuid != fsp->vuid) {
 289                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 290                 return tevent_req_post(req, ev);
 291         }
 292
 293         if (IS_IPC(conn)) {
 294                 smb2_ipc_getinfo(req, state, ev,
 295                         in_info_type, in_file_info_class);
 296                 return tevent_req_post(req, ev);
 297         }
 298
 299         switch (in_info_type) {
 300         case 0x01:/* SMB2_GETINFO_FILE */
 301         {
 302                 uint16_t file_info_level;
 303                 char *data = NULL;
 304                 unsigned int data_size = 0;
 305                 bool delete_pending = false;
 306                 struct timespec write_time_ts;
 307                 struct file_id fileid;
 308                 struct ea_list *ea_list = NULL;
 309                 int lock_data_count = 0;
 310                 char *lock_data = NULL;
 311
 312                 ZERO_STRUCT(write_time_ts);
 313
 314                 switch (in_file_info_class) {
 315                 case 0x0F:/* RAW_FILEINFO_SMB2_ALL_EAS */
 316                         file_info_level = 0xFF00 | in_file_info_class;
 317                         break;
 318
 319                 case 0x12:/* RAW_FILEINFO_SMB2_ALL_INFORMATION */
 320                         file_info_level = 0xFF00 | in_file_info_class;
 321                         break;
 322
 323                 default:
 324                         /* the levels directly map to the passthru levels */
 325                         file_info_level = in_file_info_class + 1000;
 326                         break;
 327                 }
 328
 329                 if (fsp->fake_file_handle) {
 330                         /*
 331                          * This is actually for the QUOTA_FAKE_FILE --metze
 332                          */
 333
 334                         /* We know this name is ok, it's already passed the checks. */
 335
 336                 } else if (fsp && fsp->fh->fd == -1) {
 337                         /*
 338                          * This is actually a QFILEINFO on a directory
 339                          * handle (returned from an NT SMB). NT5.0 seems
 340                          * to do this call. JRA.
 341                          */
 342
 343                         if (INFO_LEVEL_IS_UNIX(file_info_level)) {
 344                                 /* Always do lstat for UNIX calls. */
 345                                 if (SMB_VFS_LSTAT(conn, fsp->fsp_name)) {
 346                                         DEBUG(3,("smbd_smb2_getinfo_send: "
 347                                                  "SMB_VFS_LSTAT of %s failed "
 348                                                  "(%s)\n", fsp_str_dbg(fsp),
 349                                                  strerror(errno)));
 350                                         status = map_nt_error_from_unix(errno);
 351                                         tevent_req_nterror(req, status);
 352                                         return tevent_req_post(req, ev);
 353                                 }
 354                         } else if (SMB_VFS_STAT(conn, fsp->fsp_name)) {
 355                                 DEBUG(3,("smbd_smb2_getinfo_send: "
 356                                          "SMB_VFS_STAT of %s failed (%s)\n",
 357                                          fsp_str_dbg(fsp),
 358                                          strerror(errno)));
 359                                 status = map_nt_error_from_unix(errno);
 360                                 tevent_req_nterror(req, status);
 361                                 return tevent_req_post(req, ev);
 362                         }
 363
 364                         fileid = vfs_file_id_from_sbuf(conn,
 365                                                        &fsp->fsp_name->st);
 366                         get_file_infos(fileid, fsp->name_hash,
 367                                 &delete_pending, &write_time_ts);
 368                 } else {
 369                         /*
 370                          * Original code - this is an open file.
 371                          */
 372
 373                         if (SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
 374                                 DEBUG(3, ("smbd_smb2_getinfo_send: "
 375                                           "fstat of fnum %d failed (%s)\n",
 376                                           fsp->fnum, strerror(errno)));
 377                                 status = map_nt_error_from_unix(errno);
 378                                 tevent_req_nterror(req, status);
 379                                 return tevent_req_post(req, ev);
 380                         }
 381                         fileid = vfs_file_id_from_sbuf(conn,
 382                                                        &fsp->fsp_name->st);
 383                         get_file_infos(fileid, fsp->name_hash,
 384                                 &delete_pending, &write_time_ts);
 385                 }
 386
 387                 status = smbd_do_qfilepathinfo(conn, state,
 388                                                file_info_level,
 389                                                fsp,
 390                                                fsp->fsp_name,
 391                                                delete_pending,
 392                                                write_time_ts,
 393                                                ea_list,
 394                                                lock_data_count,
 395                                                lock_data,
 396                                                STR_UNICODE,
 397                                                in_output_buffer_length,
 398                                                &data,
 399                                                &data_size);
 400                 if (!NT_STATUS_IS_OK(status)) {
 401                         SAFE_FREE(data);
 402                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 403                                 status = NT_STATUS_INVALID_INFO_CLASS;
 404                         }
 405                         tevent_req_nterror(req, status);
 406                         return tevent_req_post(req, ev);
 407                 }
 408                 if (data_size > 0) {
 409                         state->out_output_buffer = data_blob_talloc(state,
 410                                                                     data,
 411                                                                     data_size);
 412                         SAFE_FREE(data);
 413                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 414                                 return tevent_req_post(req, ev);
 415                         }
 416                 }
 417                 SAFE_FREE(data);
 418                 break;
 419         }
 420
 421         case 0x02:/* SMB2_GETINFO_FS */
 422         {
 423                 uint16_t file_info_level;
 424                 char *data = NULL;
 425                 int data_size = 0;
 426
 427                 /* the levels directly map to the passthru levels */
 428                 file_info_level = in_file_info_class + 1000;
 429
 430                 status = smbd_do_qfsinfo(conn, state,
 431                                          file_info_level,
 432                                          STR_UNICODE,
 433                                          in_output_buffer_length,
 434                                          &data,
 435                                          &data_size);
 436                 if (!NT_STATUS_IS_OK(status)) {
 437                         SAFE_FREE(data);
 438                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 439                                 status = NT_STATUS_INVALID_INFO_CLASS;
 440                         }
 441                         tevent_req_nterror(req, status);
 442                         return tevent_req_post(req, ev);
 443                 }
 444                 if (data_size > 0) {
 445                         state->out_output_buffer = data_blob_talloc(state,
 446                                                                     data,
 447                                                                     data_size);
 448                         SAFE_FREE(data);
 449                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 450                                 return tevent_req_post(req, ev);
 451                         }
 452                 }
 453                 SAFE_FREE(data);
 454                 break;
 455         }
 456
 457         case 0x03:/* SMB2_GETINFO_SEC */
 458         {
 459                 uint8_t *p_marshalled_sd = NULL;
 460                 size_t sd_size = 0;
 461
 462                 status = smbd_do_query_security_desc(conn,
 463                                 state,
 464                                 fsp,
 465                                 /* Security info wanted. */
 466                                 in_additional_information,
 467                                 in_output_buffer_length,
 468                                 &p_marshalled_sd,
 469                                 &sd_size);
 470
 471                 if (NT_STATUS_EQUAL(status, NT_STATUS_BUFFER_TOO_SMALL)) {
 472                         /* Return needed size. */
 473                         state->out_output_buffer = data_blob_talloc(state,
 474                                                                     NULL,
 475                                                                     4);
 476                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 477                                 return tevent_req_post(req, ev);
 478                         }
 479                         SIVAL(state->out_output_buffer.data,0,(uint32_t)sd_size);
 480                         state->status = NT_STATUS_BUFFER_TOO_SMALL;
 481                         break;
 482                 }
 483                 if (!NT_STATUS_IS_OK(status)) {
 484                         DEBUG(10,("smbd_smb2_getinfo_send: "
 485                                  "smbd_do_query_security_desc of %s failed "
 486                                  "(%s)\n", fsp_str_dbg(fsp),
 487                                  nt_errstr(status)));
 488                         tevent_req_nterror(req, status);
 489                         return tevent_req_post(req, ev);
 490                 }
 491
 492                 if (sd_size > 0) {
 493                         state->out_output_buffer = data_blob_talloc(state,
 494                                                                     p_marshalled_sd,
 495                                                                     sd_size);
 496                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 497                                 return tevent_req_post(req, ev);
 498                         }
 499                 }
 500                 break;
 501         }
 502
 503         default:
 504                 DEBUG(10,("smbd_smb2_getinfo_send: "
 505                         "unknown in_info_type of %u "
 506                         " for file %s\n",
 507                         (unsigned int)in_info_type,
 508                         fsp_str_dbg(fsp) ));
 509
 510                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 511                 return tevent_req_post(req, ev);
 512         }
 513
 514         tevent_req_done(req);
 515         return tevent_req_post(req, ev);
 516 }
 517
 518 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
 519                                        TALLOC_CTX *mem_ctx,
 520                                        DATA_BLOB *out_output_buffer,
 521                                        NTSTATUS *pstatus)
 522 {
 523         NTSTATUS status;
 524         struct smbd_smb2_getinfo_state *state = tevent_req_data(req,
 525                                                 struct smbd_smb2_getinfo_state);
 526
 527         if (tevent_req_is_nterror(req, &status)) {
 528                 tevent_req_received(req);
 529                 return status;
 530         }
 531
 532         *out_output_buffer = state->out_output_buffer;
 533         talloc_steal(mem_ctx, out_output_buffer->data);
 534         *pstatus = state->status;
 535
 536         tevent_req_received(req);
 537         return NT_STATUS_OK;
 538 }