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/globals.h"
  24 #include "../libcli/smb/smb_common.h"
  25
  26 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
  27                                                  struct tevent_context *ev,
  28                                                  struct smbd_smb2_request *smb2req,
  29                                                  uint8_t in_info_type,
  30                                                  uint8_t in_file_info_class,
  31                                                  uint32_t in_output_buffer_length,
  32                                                  DATA_BLOB in_input_buffer,
  33                                                  uint32_t in_additional_information,
  34                                                  uint32_t in_flags,
  35                                                  uint64_t in_file_id_volatile);
  36 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
  37                                        TALLOC_CTX *mem_ctx,
  38                                        DATA_BLOB *out_output_buffer,
  39                                        NTSTATUS *p_call_status);
  40
  41 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq);
  42 NTSTATUS smbd_smb2_request_process_getinfo(struct smbd_smb2_request *req)
  43 {
  44         const uint8_t *inhdr;
  45         const uint8_t *inbody;
  46         int i = req->current_idx;
  47         size_t expected_body_size = 0x29;
  48         size_t body_size;
  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 tevent_req *subreq;
  60
  61         inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
  62         if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
  63                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  64         }
  65
  66         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
  67
  68         body_size = SVAL(inbody, 0x00);
  69         if (body_size != expected_body_size) {
  70                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  71         }
  72
  73         in_info_type                    = CVAL(inbody, 0x02);
  74         in_file_info_class              = CVAL(inbody, 0x03);
  75         in_output_buffer_length         = IVAL(inbody, 0x04);
  76         in_input_buffer_offset          = SVAL(inbody, 0x08);
  77         /* 0x0A 2 bytes reserved */
  78         in_input_buffer_length          = IVAL(inbody, 0x0C);
  79         in_additional_information       = IVAL(inbody, 0x10);
  80         in_flags                        = IVAL(inbody, 0x14);
  81         in_file_id_persistent           = BVAL(inbody, 0x18);
  82         in_file_id_volatile             = BVAL(inbody, 0x20);
  83
  84         if (in_input_buffer_offset == 0 && in_input_buffer_length == 0) {
  85                 /* This is ok */
  86         } else if (in_input_buffer_offset !=
  87                    (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
  88                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  89         }
  90
  91         if (in_input_buffer_length > req->in.vector[i+2].iov_len) {
  92                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  93         }
  94
  95         in_input_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
  96         in_input_buffer.length = in_input_buffer_length;
  97
  98         if (req->compat_chain_fsp) {
  99                 /* skip check */
 100         } else if (in_file_id_persistent != in_file_id_volatile) {
 101                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
 102         }
 103
 104         subreq = smbd_smb2_getinfo_send(req,
 105                                         req->sconn->smb2.event_ctx,
 106                                         req,
 107                                         in_info_type,
 108                                         in_file_info_class,
 109                                         in_output_buffer_length,
 110                                         in_input_buffer,
 111                                         in_additional_information,
 112                                         in_flags,
 113                                         in_file_id_volatile);
 114         if (subreq == NULL) {
 115                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 116         }
 117         tevent_req_set_callback(subreq, smbd_smb2_request_getinfo_done, req);
 118
 119         return smbd_smb2_request_pending_queue(req, subreq);
 120 }
 121
 122 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq)
 123 {
 124         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 125                                         struct smbd_smb2_request);
 126         int i = req->current_idx;
 127         uint8_t *outhdr;
 128         DATA_BLOB outbody;
 129         DATA_BLOB outdyn;
 130         uint16_t out_output_buffer_offset;
 131         DATA_BLOB out_output_buffer = data_blob_null;
 132         NTSTATUS status;
 133         NTSTATUS call_status = NT_STATUS_OK;
 134         NTSTATUS error; /* transport error */
 135
 136         status = smbd_smb2_getinfo_recv(subreq,
 137                                         req,
 138                                         &out_output_buffer,
 139                                         &call_status);
 140         TALLOC_FREE(subreq);
 141         if (!NT_STATUS_IS_OK(status)) {
 142                 error = smbd_smb2_request_error(req, status);
 143                 if (!NT_STATUS_IS_OK(error)) {
 144                         smbd_server_connection_terminate(req->sconn,
 145                                                          nt_errstr(error));
 146                         return;
 147                 }
 148                 return;
 149         }
 150
 151         if (!NT_STATUS_IS_OK(call_status)) {
 152                 /* Return a specific error with data. */
 153                 error = smbd_smb2_request_error_ex(req,
 154                                                 call_status,
 155                                                 &out_output_buffer,
 156                                                 __location__);
 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         out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
 166
 167         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 168
 169         outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
 170         if (outbody.data == NULL) {
 171                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 172                 if (!NT_STATUS_IS_OK(error)) {
 173                         smbd_server_connection_terminate(req->sconn,
 174                                                          nt_errstr(error));
 175                         return;
 176                 }
 177                 return;
 178         }
 179
 180         SSVAL(outbody.data, 0x00, 0x08 + 1);    /* struct size */
 181         SSVAL(outbody.data, 0x02,
 182               out_output_buffer_offset);        /* output buffer offset */
 183         SIVAL(outbody.data, 0x04,
 184               out_output_buffer.length);        /* output buffer length */
 185
 186         outdyn = out_output_buffer;
 187
 188         error = smbd_smb2_request_done(req, outbody, &outdyn);
 189         if (!NT_STATUS_IS_OK(error)) {
 190                 smbd_server_connection_terminate(req->sconn,
 191                                                  nt_errstr(error));
 192                 return;
 193         }
 194 }
 195
 196 struct smbd_smb2_getinfo_state {
 197         struct smbd_smb2_request *smb2req;
 198         NTSTATUS status;
 199         DATA_BLOB out_output_buffer;
 200 };
 201
 202 static void smb2_ipc_getinfo(struct tevent_req *req,
 203                                 struct smbd_smb2_getinfo_state *state,
 204                                 struct tevent_context *ev,
 205                                 uint8_t in_info_type,
 206                                 uint8_t in_file_info_class)
 207 {
 208         /* We want to reply to SMB2_GETINFO_FILE
 209            with a class of SMB2_FILE_STANDARD_INFO as
 210            otherwise a Win7 client issues this request
 211            twice (2xroundtrips) if we return NOT_SUPPORTED.
 212            NB. We do the same for SMB1 in call_trans2qpipeinfo() */
 213
 214         if (in_info_type == 0x01 && /* SMB2_GETINFO_FILE */
 215                         in_file_info_class == 0x05) { /* SMB2_FILE_STANDARD_INFO */
 216                 state->out_output_buffer = data_blob_talloc(state,
 217                                                 NULL, 24);
 218                 if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 219                         return;
 220                 }
 221
 222                 memset(state->out_output_buffer.data,0,24);
 223                 SOFF_T(state->out_output_buffer.data,0,4096LL);
 224                 SIVAL(state->out_output_buffer.data,16,1);
 225                 SIVAL(state->out_output_buffer.data,20,1);
 226                 tevent_req_done(req);
 227         } else {
 228                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 229         }
 230 }
 231
 232 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
 233                                                  struct tevent_context *ev,
 234                                                  struct smbd_smb2_request *smb2req,
 235                                                  uint8_t in_info_type,
 236                                                  uint8_t in_file_info_class,
 237                                                  uint32_t in_output_buffer_length,
 238                                                  DATA_BLOB in_input_buffer,
 239                                                  uint32_t in_additional_information,
 240                                                  uint32_t in_flags,
 241                                                  uint64_t in_file_id_volatile)
 242 {
 243         struct tevent_req *req;
 244         struct smbd_smb2_getinfo_state *state;
 245         struct smb_request *smbreq;
 246         connection_struct *conn = smb2req->tcon->compat_conn;
 247         files_struct *fsp;
 248         NTSTATUS status;
 249
 250         req = tevent_req_create(mem_ctx, &state,
 251                                 struct smbd_smb2_getinfo_state);
 252         if (req == NULL) {
 253                 return NULL;
 254         }
 255         state->smb2req = smb2req;
 256         state->status = NT_STATUS_OK;
 257         state->out_output_buffer = data_blob_null;
 258
 259         DEBUG(10,("smbd_smb2_getinfo_send: file_id[0x%016llX]\n",
 260                   (unsigned long long)in_file_id_volatile));
 261
 262         smbreq = smbd_smb2_fake_smb_request(smb2req);
 263         if (tevent_req_nomem(smbreq, req)) {
 264                 return tevent_req_post(req, ev);
 265         }
 266
 267         fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
 268         if (fsp == NULL) {
 269                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 270                 return tevent_req_post(req, ev);
 271         }
 272         if (conn != fsp->conn) {
 273                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 274                 return tevent_req_post(req, ev);
 275         }
 276         if (smb2req->session->vuid != fsp->vuid) {
 277                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 278                 return tevent_req_post(req, ev);
 279         }
 280
 281         if (IS_IPC(conn)) {
 282                 smb2_ipc_getinfo(req, state, ev,
 283                         in_info_type, in_file_info_class);
 284                 return tevent_req_post(req, ev);
 285         }
 286
 287         switch (in_info_type) {
 288         case 0x01:/* SMB2_GETINFO_FILE */
 289         {
 290                 uint16_t file_info_level;
 291                 char *data = NULL;
 292                 unsigned int data_size = 0;
 293                 bool delete_pending = false;
 294                 struct timespec write_time_ts;
 295                 struct file_id fileid;
 296                 struct ea_list *ea_list = NULL;
 297                 int lock_data_count = 0;
 298                 char *lock_data = NULL;
 299
 300                 ZERO_STRUCT(write_time_ts);
 301
 302                 switch (in_file_info_class) {
 303                 case 0x0F:/* RAW_FILEINFO_SMB2_ALL_EAS */
 304                         file_info_level = 0xFF00 | in_file_info_class;
 305                         break;
 306
 307                 case 0x12:/* RAW_FILEINFO_SMB2_ALL_INFORMATION */
 308                         file_info_level = 0xFF00 | in_file_info_class;
 309                         break;
 310
 311                 default:
 312                         /* the levels directly map to the passthru levels */
 313                         file_info_level = in_file_info_class + 1000;
 314                         break;
 315                 }
 316
 317                 if (fsp->fake_file_handle) {
 318                         /*
 319                          * This is actually for the QUOTA_FAKE_FILE --metze
 320                          */
 321
 322                         /* We know this name is ok, it's already passed the checks. */
 323
 324                 } else if (fsp && fsp->fh->fd == -1) {
 325                         /*
 326                          * This is actually a QFILEINFO on a directory
 327                          * handle (returned from an NT SMB). NT5.0 seems
 328                          * to do this call. JRA.
 329                          */
 330
 331                         if (INFO_LEVEL_IS_UNIX(file_info_level)) {
 332                                 /* Always do lstat for UNIX calls. */
 333                                 if (SMB_VFS_LSTAT(conn, fsp->fsp_name)) {
 334                                         DEBUG(3,("smbd_smb2_getinfo_send: "
 335                                                  "SMB_VFS_LSTAT of %s failed "
 336                                                  "(%s)\n", fsp_str_dbg(fsp),
 337                                                  strerror(errno)));
 338                                         status = map_nt_error_from_unix(errno);
 339                                         tevent_req_nterror(req, status);
 340                                         return tevent_req_post(req, ev);
 341                                 }
 342                         } else if (SMB_VFS_STAT(conn, fsp->fsp_name)) {
 343                                 DEBUG(3,("smbd_smb2_getinfo_send: "
 344                                          "SMB_VFS_STAT of %s failed (%s)\n",
 345                                          fsp_str_dbg(fsp),
 346                                          strerror(errno)));
 347                                 status = map_nt_error_from_unix(errno);
 348                                 tevent_req_nterror(req, status);
 349                                 return tevent_req_post(req, ev);
 350                         }
 351
 352                         fileid = vfs_file_id_from_sbuf(conn,
 353                                                        &fsp->fsp_name->st);
 354                         get_file_infos(fileid, fsp->name_hash,
 355                                 &delete_pending, &write_time_ts);
 356                 } else {
 357                         /*
 358                          * Original code - this is an open file.
 359                          */
 360
 361                         if (SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
 362                                 DEBUG(3, ("smbd_smb2_getinfo_send: "
 363                                           "fstat of fnum %d failed (%s)\n",
 364                                           fsp->fnum, strerror(errno)));
 365                                 status = map_nt_error_from_unix(errno);
 366                                 tevent_req_nterror(req, status);
 367                                 return tevent_req_post(req, ev);
 368                         }
 369                         fileid = vfs_file_id_from_sbuf(conn,
 370                                                        &fsp->fsp_name->st);
 371                         get_file_infos(fileid, fsp->name_hash,
 372                                 &delete_pending, &write_time_ts);
 373                 }
 374
 375                 status = smbd_do_qfilepathinfo(conn, state,
 376                                                file_info_level,
 377                                                fsp,
 378                                                fsp->fsp_name,
 379                                                delete_pending,
 380                                                write_time_ts,
 381                                                ea_list,
 382                                                lock_data_count,
 383                                                lock_data,
 384                                                STR_UNICODE,
 385                                                in_output_buffer_length,
 386                                                &data,
 387                                                &data_size);
 388                 if (!NT_STATUS_IS_OK(status)) {
 389                         SAFE_FREE(data);
 390                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 391                                 status = NT_STATUS_INVALID_INFO_CLASS;
 392                         }
 393                         tevent_req_nterror(req, status);
 394                         return tevent_req_post(req, ev);
 395                 }
 396                 if (data_size > 0) {
 397                         state->out_output_buffer = data_blob_talloc(state,
 398                                                                     data,
 399                                                                     data_size);
 400                         SAFE_FREE(data);
 401                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 402                                 return tevent_req_post(req, ev);
 403                         }
 404                 }
 405                 SAFE_FREE(data);
 406                 break;
 407         }
 408
 409         case 0x02:/* SMB2_GETINFO_FS */
 410         {
 411                 uint16_t file_info_level;
 412                 char *data = NULL;
 413                 int data_size = 0;
 414
 415                 /* the levels directly map to the passthru levels */
 416                 file_info_level = in_file_info_class + 1000;
 417
 418                 status = smbd_do_qfsinfo(conn, state,
 419                                          file_info_level,
 420                                          STR_UNICODE,
 421                                          in_output_buffer_length,
 422                                          &data,
 423                                          &data_size);
 424                 if (!NT_STATUS_IS_OK(status)) {
 425                         SAFE_FREE(data);
 426                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 427                                 status = NT_STATUS_INVALID_INFO_CLASS;
 428                         }
 429                         tevent_req_nterror(req, status);
 430                         return tevent_req_post(req, ev);
 431                 }
 432                 if (data_size > 0) {
 433                         state->out_output_buffer = data_blob_talloc(state,
 434                                                                     data,
 435                                                                     data_size);
 436                         SAFE_FREE(data);
 437                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 438                                 return tevent_req_post(req, ev);
 439                         }
 440                 }
 441                 SAFE_FREE(data);
 442                 break;
 443         }
 444
 445         case 0x03:/* SMB2_GETINFO_SEC */
 446         {
 447                 uint8_t *p_marshalled_sd = NULL;
 448                 size_t sd_size = 0;
 449
 450                 status = smbd_do_query_security_desc(conn,
 451                                 state,
 452                                 fsp,
 453                                 /* Security info wanted. */
 454                                 in_additional_information,
 455                                 in_output_buffer_length,
 456                                 &p_marshalled_sd,
 457                                 &sd_size);
 458
 459                 if (NT_STATUS_EQUAL(status, NT_STATUS_BUFFER_TOO_SMALL)) {
 460                         /* Return needed size. */
 461                         state->out_output_buffer = data_blob_talloc(state,
 462                                                                     NULL,
 463                                                                     4);
 464                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 465                                 return tevent_req_post(req, ev);
 466                         }
 467                         SIVAL(state->out_output_buffer.data,0,(uint32_t)sd_size);
 468                         state->status = NT_STATUS_BUFFER_TOO_SMALL;
 469                         break;
 470                 }
 471                 if (!NT_STATUS_IS_OK(status)) {
 472                         DEBUG(10,("smbd_smb2_getinfo_send: "
 473                                  "smbd_do_query_security_desc of %s failed "
 474                                  "(%s)\n", fsp_str_dbg(fsp),
 475                                  nt_errstr(status)));
 476                         tevent_req_nterror(req, status);
 477                         return tevent_req_post(req, ev);
 478                 }
 479
 480                 if (sd_size > 0) {
 481                         state->out_output_buffer = data_blob_talloc(state,
 482                                                                     p_marshalled_sd,
 483                                                                     sd_size);
 484                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 485                                 return tevent_req_post(req, ev);
 486                         }
 487                 }
 488                 break;
 489         }
 490
 491         default:
 492                 DEBUG(10,("smbd_smb2_getinfo_send: "
 493                         "unknown in_info_type of %u "
 494                         " for file %s\n",
 495                         (unsigned int)in_info_type,
 496                         fsp_str_dbg(fsp) ));
 497
 498                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 499                 return tevent_req_post(req, ev);
 500         }
 501
 502         tevent_req_done(req);
 503         return tevent_req_post(req, ev);
 504 }
 505
 506 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
 507                                        TALLOC_CTX *mem_ctx,
 508                                        DATA_BLOB *out_output_buffer,
 509                                        NTSTATUS *pstatus)
 510 {
 511         NTSTATUS status;
 512         struct smbd_smb2_getinfo_state *state = tevent_req_data(req,
 513                                                 struct smbd_smb2_getinfo_state);
 514
 515         if (tevent_req_is_nterror(req, &status)) {
 516                 tevent_req_received(req);
 517                 return status;
 518         }
 519
 520         *out_output_buffer = state->out_output_buffer;
 521         talloc_steal(mem_ctx, out_output_buffer->data);
 522         *pstatus = state->status;
 523
 524         tevent_req_received(req);
 525         return NT_STATUS_OK;
 526 }