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         const uint8_t *inhdr;
  48         const uint8_t *inbody;
  49         int i = req->current_idx;
  50         size_t expected_body_size = 0x29;
  51         size_t body_size;
  52         uint8_t in_info_type;
  53         uint8_t in_file_info_class;
  54         uint32_t in_output_buffer_length;
  55         uint16_t in_input_buffer_offset;
  56         uint32_t in_input_buffer_length;
  57         DATA_BLOB in_input_buffer;
  58         uint32_t in_additional_information;
  59         uint32_t in_flags;
  60         uint64_t in_file_id_persistent;
  61         uint64_t in_file_id_volatile;
  62         struct tevent_req *subreq;
  63
  64         inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
  65         if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
  66                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  67         }
  68
  69         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
  70
  71         body_size = SVAL(inbody, 0x00);
  72         if (body_size != expected_body_size) {
  73                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  74         }
  75
  76         in_info_type                    = CVAL(inbody, 0x02);
  77         in_file_info_class              = CVAL(inbody, 0x03);
  78         in_output_buffer_length         = IVAL(inbody, 0x04);
  79         in_input_buffer_offset          = SVAL(inbody, 0x08);
  80         /* 0x0A 2 bytes reserved */
  81         in_input_buffer_length          = IVAL(inbody, 0x0C);
  82         in_additional_information       = IVAL(inbody, 0x10);
  83         in_flags                        = IVAL(inbody, 0x14);
  84         in_file_id_persistent           = BVAL(inbody, 0x18);
  85         in_file_id_volatile             = BVAL(inbody, 0x20);
  86
  87         if (in_input_buffer_offset == 0 && in_input_buffer_length == 0) {
  88                 /* This is ok */
  89         } else if (in_input_buffer_offset !=
  90                    (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
  91                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  92         }
  93
  94         if (in_input_buffer_length > req->in.vector[i+2].iov_len) {
  95                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  96         }
  97
  98         in_input_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
  99         in_input_buffer.length = in_input_buffer_length;
 100
 101         if (req->compat_chain_fsp) {
 102                 /* skip check */
 103         } else if (in_file_id_persistent != in_file_id_volatile) {
 104                 return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
 105         }
 106
 107         subreq = smbd_smb2_getinfo_send(req,
 108                                         req->sconn->smb2.event_ctx,
 109                                         req,
 110                                         in_info_type,
 111                                         in_file_info_class,
 112                                         in_output_buffer_length,
 113                                         in_input_buffer,
 114                                         in_additional_information,
 115                                         in_flags,
 116                                         in_file_id_volatile);
 117         if (subreq == NULL) {
 118                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 119         }
 120         tevent_req_set_callback(subreq, smbd_smb2_request_getinfo_done, req);
 121
 122         return smbd_smb2_request_pending_queue(req, subreq);
 123 }
 124
 125 static void smbd_smb2_request_getinfo_done(struct tevent_req *subreq)
 126 {
 127         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 128                                         struct smbd_smb2_request);
 129         int i = req->current_idx;
 130         uint8_t *outhdr;
 131         DATA_BLOB outbody;
 132         DATA_BLOB outdyn;
 133         uint16_t out_output_buffer_offset;
 134         DATA_BLOB out_output_buffer = data_blob_null;
 135         NTSTATUS status;
 136         NTSTATUS call_status = NT_STATUS_OK;
 137         NTSTATUS error; /* transport error */
 138
 139         status = smbd_smb2_getinfo_recv(subreq,
 140                                         req,
 141                                         &out_output_buffer,
 142                                         &call_status);
 143         TALLOC_FREE(subreq);
 144         if (!NT_STATUS_IS_OK(status)) {
 145                 error = smbd_smb2_request_error(req, status);
 146                 if (!NT_STATUS_IS_OK(error)) {
 147                         smbd_server_connection_terminate(req->sconn,
 148                                                          nt_errstr(error));
 149                         return;
 150                 }
 151                 return;
 152         }
 153
 154         if (!NT_STATUS_IS_OK(call_status)) {
 155                 /* Return a specific error with data. */
 156                 error = smbd_smb2_request_error_ex(req,
 157                                                 call_status,
 158                                                 &out_output_buffer,
 159                                                 __location__);
 160                 if (!NT_STATUS_IS_OK(error)) {
 161                         smbd_server_connection_terminate(req->sconn,
 162                                                          nt_errstr(error));
 163                         return;
 164                 }
 165                 return;
 166         }
 167
 168         out_output_buffer_offset = SMB2_HDR_BODY + 0x08;
 169
 170         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 171
 172         outbody = data_blob_talloc(req->out.vector, NULL, 0x08);
 173         if (outbody.data == NULL) {
 174                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 175                 if (!NT_STATUS_IS_OK(error)) {
 176                         smbd_server_connection_terminate(req->sconn,
 177                                                          nt_errstr(error));
 178                         return;
 179                 }
 180                 return;
 181         }
 182
 183         SSVAL(outbody.data, 0x00, 0x08 + 1);    /* struct size */
 184         SSVAL(outbody.data, 0x02,
 185               out_output_buffer_offset);        /* output buffer offset */
 186         SIVAL(outbody.data, 0x04,
 187               out_output_buffer.length);        /* output buffer length */
 188
 189         outdyn = out_output_buffer;
 190
 191         error = smbd_smb2_request_done(req, outbody, &outdyn);
 192         if (!NT_STATUS_IS_OK(error)) {
 193                 smbd_server_connection_terminate(req->sconn,
 194                                                  nt_errstr(error));
 195                 return;
 196         }
 197 }
 198
 199 struct smbd_smb2_getinfo_state {
 200         struct smbd_smb2_request *smb2req;
 201         NTSTATUS status;
 202         DATA_BLOB out_output_buffer;
 203 };
 204
 205 static void smb2_ipc_getinfo(struct tevent_req *req,
 206                                 struct smbd_smb2_getinfo_state *state,
 207                                 struct tevent_context *ev,
 208                                 uint8_t in_info_type,
 209                                 uint8_t in_file_info_class)
 210 {
 211         /* We want to reply to SMB2_GETINFO_FILE
 212            with a class of SMB2_FILE_STANDARD_INFO as
 213            otherwise a Win7 client issues this request
 214            twice (2xroundtrips) if we return NOT_SUPPORTED.
 215            NB. We do the same for SMB1 in call_trans2qpipeinfo() */
 216
 217         if (in_info_type == 0x01 && /* SMB2_GETINFO_FILE */
 218                         in_file_info_class == 0x05) { /* SMB2_FILE_STANDARD_INFO */
 219                 state->out_output_buffer = data_blob_talloc(state,
 220                                                 NULL, 24);
 221                 if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 222                         return;
 223                 }
 224
 225                 memset(state->out_output_buffer.data,0,24);
 226                 SOFF_T(state->out_output_buffer.data,0,4096LL);
 227                 SIVAL(state->out_output_buffer.data,16,1);
 228                 SIVAL(state->out_output_buffer.data,20,1);
 229                 tevent_req_done(req);
 230         } else {
 231                 tevent_req_nterror(req, NT_STATUS_NOT_SUPPORTED);
 232         }
 233 }
 234
 235 static struct tevent_req *smbd_smb2_getinfo_send(TALLOC_CTX *mem_ctx,
 236                                                  struct tevent_context *ev,
 237                                                  struct smbd_smb2_request *smb2req,
 238                                                  uint8_t in_info_type,
 239                                                  uint8_t in_file_info_class,
 240                                                  uint32_t in_output_buffer_length,
 241                                                  DATA_BLOB in_input_buffer,
 242                                                  uint32_t in_additional_information,
 243                                                  uint32_t in_flags,
 244                                                  uint64_t in_file_id_volatile)
 245 {
 246         struct tevent_req *req;
 247         struct smbd_smb2_getinfo_state *state;
 248         struct smb_request *smbreq;
 249         connection_struct *conn = smb2req->tcon->compat_conn;
 250         files_struct *fsp;
 251         NTSTATUS status;
 252
 253         req = tevent_req_create(mem_ctx, &state,
 254                                 struct smbd_smb2_getinfo_state);
 255         if (req == NULL) {
 256                 return NULL;
 257         }
 258         state->smb2req = smb2req;
 259         state->status = NT_STATUS_OK;
 260         state->out_output_buffer = data_blob_null;
 261
 262         DEBUG(10,("smbd_smb2_getinfo_send: file_id[0x%016llX]\n",
 263                   (unsigned long long)in_file_id_volatile));
 264
 265         smbreq = smbd_smb2_fake_smb_request(smb2req);
 266         if (tevent_req_nomem(smbreq, req)) {
 267                 return tevent_req_post(req, ev);
 268         }
 269
 270         fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
 271         if (fsp == NULL) {
 272                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 273                 return tevent_req_post(req, ev);
 274         }
 275         if (conn != fsp->conn) {
 276                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 277                 return tevent_req_post(req, ev);
 278         }
 279         if (smb2req->session->vuid != fsp->vuid) {
 280                 tevent_req_nterror(req, NT_STATUS_FILE_CLOSED);
 281                 return tevent_req_post(req, ev);
 282         }
 283
 284         if (IS_IPC(conn)) {
 285                 smb2_ipc_getinfo(req, state, ev,
 286                         in_info_type, in_file_info_class);
 287                 return tevent_req_post(req, ev);
 288         }
 289
 290         switch (in_info_type) {
 291         case 0x01:/* SMB2_GETINFO_FILE */
 292         {
 293                 uint16_t file_info_level;
 294                 char *data = NULL;
 295                 unsigned int data_size = 0;
 296                 bool delete_pending = false;
 297                 struct timespec write_time_ts;
 298                 struct file_id fileid;
 299                 struct ea_list *ea_list = NULL;
 300                 int lock_data_count = 0;
 301                 char *lock_data = NULL;
 302
 303                 ZERO_STRUCT(write_time_ts);
 304
 305                 switch (in_file_info_class) {
 306                 case 0x0F:/* RAW_FILEINFO_SMB2_ALL_EAS */
 307                         file_info_level = 0xFF00 | in_file_info_class;
 308                         break;
 309
 310                 case 0x12:/* RAW_FILEINFO_SMB2_ALL_INFORMATION */
 311                         file_info_level = 0xFF00 | in_file_info_class;
 312                         break;
 313
 314                 default:
 315                         /* the levels directly map to the passthru levels */
 316                         file_info_level = in_file_info_class + 1000;
 317                         break;
 318                 }
 319
 320                 if (fsp->fake_file_handle) {
 321                         /*
 322                          * This is actually for the QUOTA_FAKE_FILE --metze
 323                          */
 324
 325                         /* We know this name is ok, it's already passed the checks. */
 326
 327                 } else if (fsp && fsp->fh->fd == -1) {
 328                         /*
 329                          * This is actually a QFILEINFO on a directory
 330                          * handle (returned from an NT SMB). NT5.0 seems
 331                          * to do this call. JRA.
 332                          */
 333
 334                         if (INFO_LEVEL_IS_UNIX(file_info_level)) {
 335                                 /* Always do lstat for UNIX calls. */
 336                                 if (SMB_VFS_LSTAT(conn, fsp->fsp_name)) {
 337                                         DEBUG(3,("smbd_smb2_getinfo_send: "
 338                                                  "SMB_VFS_LSTAT of %s failed "
 339                                                  "(%s)\n", fsp_str_dbg(fsp),
 340                                                  strerror(errno)));
 341                                         status = map_nt_error_from_unix(errno);
 342                                         tevent_req_nterror(req, status);
 343                                         return tevent_req_post(req, ev);
 344                                 }
 345                         } else if (SMB_VFS_STAT(conn, fsp->fsp_name)) {
 346                                 DEBUG(3,("smbd_smb2_getinfo_send: "
 347                                          "SMB_VFS_STAT of %s failed (%s)\n",
 348                                          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
 355                         fileid = vfs_file_id_from_sbuf(conn,
 356                                                        &fsp->fsp_name->st);
 357                         get_file_infos(fileid, fsp->name_hash,
 358                                 &delete_pending, &write_time_ts);
 359                 } else {
 360                         /*
 361                          * Original code - this is an open file.
 362                          */
 363
 364                         if (SMB_VFS_FSTAT(fsp, &fsp->fsp_name->st) != 0) {
 365                                 DEBUG(3, ("smbd_smb2_getinfo_send: "
 366                                           "fstat of fnum %d failed (%s)\n",
 367                                           fsp->fnum, strerror(errno)));
 368                                 status = map_nt_error_from_unix(errno);
 369                                 tevent_req_nterror(req, status);
 370                                 return tevent_req_post(req, ev);
 371                         }
 372                         fileid = vfs_file_id_from_sbuf(conn,
 373                                                        &fsp->fsp_name->st);
 374                         get_file_infos(fileid, fsp->name_hash,
 375                                 &delete_pending, &write_time_ts);
 376                 }
 377
 378                 status = smbd_do_qfilepathinfo(conn, state,
 379                                                file_info_level,
 380                                                fsp,
 381                                                fsp->fsp_name,
 382                                                delete_pending,
 383                                                write_time_ts,
 384                                                ea_list,
 385                                                lock_data_count,
 386                                                lock_data,
 387                                                STR_UNICODE,
 388                                                in_output_buffer_length,
 389                                                &data,
 390                                                &data_size);
 391                 if (!NT_STATUS_IS_OK(status)) {
 392                         SAFE_FREE(data);
 393                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 394                                 status = NT_STATUS_INVALID_INFO_CLASS;
 395                         }
 396                         tevent_req_nterror(req, status);
 397                         return tevent_req_post(req, ev);
 398                 }
 399                 if (data_size > 0) {
 400                         state->out_output_buffer = data_blob_talloc(state,
 401                                                                     data,
 402                                                                     data_size);
 403                         SAFE_FREE(data);
 404                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 405                                 return tevent_req_post(req, ev);
 406                         }
 407                 }
 408                 SAFE_FREE(data);
 409                 break;
 410         }
 411
 412         case 0x02:/* SMB2_GETINFO_FS */
 413         {
 414                 uint16_t file_info_level;
 415                 char *data = NULL;
 416                 int data_size = 0;
 417
 418                 /* the levels directly map to the passthru levels */
 419                 file_info_level = in_file_info_class + 1000;
 420
 421                 status = smbd_do_qfsinfo(conn, state,
 422                                          file_info_level,
 423                                          STR_UNICODE,
 424                                          in_output_buffer_length,
 425                                          &data,
 426                                          &data_size);
 427                 if (!NT_STATUS_IS_OK(status)) {
 428                         SAFE_FREE(data);
 429                         if (NT_STATUS_EQUAL(status, NT_STATUS_INVALID_LEVEL)) {
 430                                 status = NT_STATUS_INVALID_INFO_CLASS;
 431                         }
 432                         tevent_req_nterror(req, status);
 433                         return tevent_req_post(req, ev);
 434                 }
 435                 if (data_size > 0) {
 436                         state->out_output_buffer = data_blob_talloc(state,
 437                                                                     data,
 438                                                                     data_size);
 439                         SAFE_FREE(data);
 440                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 441                                 return tevent_req_post(req, ev);
 442                         }
 443                 }
 444                 SAFE_FREE(data);
 445                 break;
 446         }
 447
 448         case 0x03:/* SMB2_GETINFO_SEC */
 449         {
 450                 uint8_t *p_marshalled_sd = NULL;
 451                 size_t sd_size = 0;
 452
 453                 status = smbd_do_query_security_desc(conn,
 454                                 state,
 455                                 fsp,
 456                                 /* Security info wanted. */
 457                                 in_additional_information,
 458                                 in_output_buffer_length,
 459                                 &p_marshalled_sd,
 460                                 &sd_size);
 461
 462                 if (NT_STATUS_EQUAL(status, NT_STATUS_BUFFER_TOO_SMALL)) {
 463                         /* Return needed size. */
 464                         state->out_output_buffer = data_blob_talloc(state,
 465                                                                     NULL,
 466                                                                     4);
 467                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 468                                 return tevent_req_post(req, ev);
 469                         }
 470                         SIVAL(state->out_output_buffer.data,0,(uint32_t)sd_size);
 471                         state->status = NT_STATUS_BUFFER_TOO_SMALL;
 472                         break;
 473                 }
 474                 if (!NT_STATUS_IS_OK(status)) {
 475                         DEBUG(10,("smbd_smb2_getinfo_send: "
 476                                  "smbd_do_query_security_desc of %s failed "
 477                                  "(%s)\n", fsp_str_dbg(fsp),
 478                                  nt_errstr(status)));
 479                         tevent_req_nterror(req, status);
 480                         return tevent_req_post(req, ev);
 481                 }
 482
 483                 if (sd_size > 0) {
 484                         state->out_output_buffer = data_blob_talloc(state,
 485                                                                     p_marshalled_sd,
 486                                                                     sd_size);
 487                         if (tevent_req_nomem(state->out_output_buffer.data, req)) {
 488                                 return tevent_req_post(req, ev);
 489                         }
 490                 }
 491                 break;
 492         }
 493
 494         default:
 495                 DEBUG(10,("smbd_smb2_getinfo_send: "
 496                         "unknown in_info_type of %u "
 497                         " for file %s\n",
 498                         (unsigned int)in_info_type,
 499                         fsp_str_dbg(fsp) ));
 500
 501                 tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
 502                 return tevent_req_post(req, ev);
 503         }
 504
 505         tevent_req_done(req);
 506         return tevent_req_post(req, ev);
 507 }
 508
 509 static NTSTATUS smbd_smb2_getinfo_recv(struct tevent_req *req,
 510                                        TALLOC_CTX *mem_ctx,
 511                                        DATA_BLOB *out_output_buffer,
 512                                        NTSTATUS *pstatus)
 513 {
 514         NTSTATUS status;
 515         struct smbd_smb2_getinfo_state *state = tevent_req_data(req,
 516                                                 struct smbd_smb2_getinfo_state);
 517
 518         if (tevent_req_is_nterror(req, &status)) {
 519                 tevent_req_received(req);
 520                 return status;
 521         }
 522
 523         *out_output_buffer = state->out_output_buffer;
 524         talloc_steal(mem_ctx, out_output_buffer->data);
 525         *pstatus = state->status;
 526
 527         tevent_req_received(req);
 528         return NT_STATUS_OK;
 529 }