source3/smbd/smb2_create.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include "includes.h"
  22 #include "smbd/globals.h"
  23 #include "../libcli/smb/smb_common.h"
  24
  25 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
  26                                                 struct tevent_context *ev,
  27                                                 struct smbd_smb2_request *smb2req,
  28                                                 uint8_t in_oplock_level,
  29                                                 uint32_t in_impersonation_level,
  30                                                 uint32_t in_desired_access,
  31                                                 uint32_t in_file_attributes,
  32                                                 uint32_t in_share_access,
  33                                                 uint32_t in_create_disposition,
  34                                                 uint32_t in_create_options,
  35                                                 const char *in_name);
  36 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
  37                                       uint8_t *out_oplock_level,
  38                                       uint32_t *out_create_action,
  39                                       NTTIME *out_creation_time,
  40                                       NTTIME *out_last_access_time,
  41                                       NTTIME *out_last_write_time,
  42                                       NTTIME *out_change_time,
  43                                       uint64_t *out_allocation_size,
  44                                       uint64_t *out_end_of_file,
  45                                       uint32_t *out_file_attributes,
  46                                       uint64_t *out_file_id_volatile);
  47
  48 static void smbd_smb2_request_create_done(struct tevent_req *subreq);
  49 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req)
  50 {
  51         const uint8_t *inbody;
  52         int i = req->current_idx;
  53         size_t expected_body_size = 0x39;
  54         size_t body_size;
  55         uint8_t in_oplock_level;
  56         uint32_t in_impersonation_level;
  57         uint32_t in_desired_access;
  58         uint32_t in_file_attributes;
  59         uint32_t in_share_access;
  60         uint32_t in_create_disposition;
  61         uint32_t in_create_options;
  62         uint16_t in_name_offset;
  63         uint16_t in_name_length;
  64         DATA_BLOB in_name_buffer;
  65         char *in_name_string;
  66         size_t in_name_string_size;
  67         bool ok;
  68         struct tevent_req *subreq;
  69
  70         if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
  71                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  72         }
  73
  74         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
  75
  76         body_size = SVAL(inbody, 0x00);
  77         if (body_size != expected_body_size) {
  78                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  79         }
  80
  81         in_oplock_level         = CVAL(inbody, 0x03);
  82         in_impersonation_level  = IVAL(inbody, 0x04);
  83         in_desired_access       = IVAL(inbody, 0x18);
  84         in_file_attributes      = IVAL(inbody, 0x1C);
  85         in_share_access         = IVAL(inbody, 0x20);
  86         in_create_disposition   = IVAL(inbody, 0x24);
  87         in_create_options       = IVAL(inbody, 0x28);
  88         in_name_offset          = SVAL(inbody, 0x2C);
  89         in_name_length          = SVAL(inbody, 0x2E);
  90
  91         if (in_name_offset == 0 && in_name_length == 0) {
  92                 /* This is ok */
  93         } else if (in_name_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
  94                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  95         }
  96
  97         if (in_name_length > req->in.vector[i+2].iov_len) {
  98                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  99         }
 100
 101         in_name_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
 102         in_name_buffer.length = in_name_length;
 103
 104         ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
 105                                    in_name_buffer.data,
 106                                    in_name_buffer.length,
 107                                    &in_name_string,
 108                                    &in_name_string_size, false);
 109         if (!ok) {
 110                 return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
 111         }
 112
 113         subreq = smbd_smb2_create_send(req,
 114                                        req->sconn->smb2.event_ctx,
 115                                        req,
 116                                        in_oplock_level,
 117                                        in_impersonation_level,
 118                                        in_desired_access,
 119                                        in_file_attributes,
 120                                        in_share_access,
 121                                        in_create_disposition,
 122                                        in_create_options,
 123                                        in_name_string);
 124         if (subreq == NULL) {
 125                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 126         }
 127         tevent_req_set_callback(subreq, smbd_smb2_request_create_done, req);
 128
 129         return smbd_smb2_request_pending_queue(req, subreq);
 130 }
 131
 132 static void smbd_smb2_request_create_done(struct tevent_req *subreq)
 133 {
 134         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 135                                         struct smbd_smb2_request);
 136         int i = req->current_idx;
 137         uint8_t *outhdr;
 138         DATA_BLOB outbody;
 139         DATA_BLOB outdyn;
 140         uint8_t out_oplock_level = 0;
 141         uint32_t out_create_action = 0;
 142         NTTIME out_creation_time = 0;
 143         NTTIME out_last_access_time = 0;
 144         NTTIME out_last_write_time = 0;
 145         NTTIME out_change_time = 0;
 146         uint64_t out_allocation_size = 0;
 147         uint64_t out_end_of_file = 0;
 148         uint32_t out_file_attributes = 0;
 149         uint64_t out_file_id_volatile = 0;
 150         NTSTATUS status;
 151         NTSTATUS error; /* transport error */
 152
 153         status = smbd_smb2_create_recv(subreq,
 154                                        &out_oplock_level,
 155                                        &out_create_action,
 156                                        &out_creation_time,
 157                                        &out_last_access_time,
 158                                        &out_last_write_time,
 159                                        &out_change_time,
 160                                        &out_allocation_size,
 161                                        &out_end_of_file,
 162                                        &out_file_attributes,
 163                                        &out_file_id_volatile);
 164         TALLOC_FREE(subreq);
 165         if (!NT_STATUS_IS_OK(status)) {
 166                 error = smbd_smb2_request_error(req, status);
 167                 if (!NT_STATUS_IS_OK(error)) {
 168                         smbd_server_connection_terminate(req->sconn,
 169                                                          nt_errstr(error));
 170                         return;
 171                 }
 172                 return;
 173         }
 174
 175         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 176
 177         outbody = data_blob_talloc(req->out.vector, NULL, 0x58);
 178         if (outbody.data == NULL) {
 179                 error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 180                 if (!NT_STATUS_IS_OK(error)) {
 181                         smbd_server_connection_terminate(req->sconn,
 182                                                          nt_errstr(error));
 183                         return;
 184                 }
 185                 return;
 186         }
 187
 188         SSVAL(outbody.data, 0x00, 0x58 + 1);    /* struct size */
 189         SCVAL(outbody.data, 0x02,
 190               out_oplock_level);                /* oplock level */
 191         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 192         SIVAL(outbody.data, 0x04,
 193               out_create_action);               /* create action */
 194         SBVAL(outbody.data, 0x08,
 195               out_creation_time);               /* creation time */
 196         SBVAL(outbody.data, 0x10,
 197               out_last_access_time);            /* last access time */
 198         SBVAL(outbody.data, 0x18,
 199               out_last_write_time);             /* last write time */
 200         SBVAL(outbody.data, 0x20,
 201               out_change_time);                 /* change time */
 202         SBVAL(outbody.data, 0x28,
 203               out_allocation_size);             /* allocation size */
 204         SBVAL(outbody.data, 0x30,
 205               out_end_of_file);                 /* end of file */
 206         SIVAL(outbody.data, 0x38,
 207               out_file_attributes);             /* file attributes */
 208         SIVAL(outbody.data, 0x3C, 0);           /* reserved */
 209         SBVAL(outbody.data, 0x40, 0);           /* file id (persistent) */
 210         SBVAL(outbody.data, 0x48,
 211               out_file_id_volatile);            /* file id (volatile) */
 212         SIVAL(outbody.data, 0x50, 0);           /* create contexts offset */
 213         SIVAL(outbody.data, 0x54, 0);           /* create contexts length */
 214
 215         outdyn = data_blob_const(NULL, 0);
 216
 217         error = smbd_smb2_request_done(req, outbody, &outdyn);
 218         if (!NT_STATUS_IS_OK(error)) {
 219                 smbd_server_connection_terminate(req->sconn,
 220                                                  nt_errstr(error));
 221                 return;
 222         }
 223 }
 224
 225 struct smbd_smb2_create_state {
 226         struct smbd_smb2_request *smb2req;
 227         uint8_t out_oplock_level;
 228         uint32_t out_create_action;
 229         NTTIME out_creation_time;
 230         NTTIME out_last_access_time;
 231         NTTIME out_last_write_time;
 232         NTTIME out_change_time;
 233         uint64_t out_allocation_size;
 234         uint64_t out_end_of_file;
 235         uint32_t out_file_attributes;
 236         uint64_t out_file_id_volatile;
 237 };
 238
 239 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
 240                                                 struct tevent_context *ev,
 241                                                 struct smbd_smb2_request *smb2req,
 242                                                 uint8_t in_oplock_level,
 243                                                 uint32_t in_impersonation_level,
 244                                                 uint32_t in_desired_access,
 245                                                 uint32_t in_file_attributes,
 246                                                 uint32_t in_share_access,
 247                                                 uint32_t in_create_disposition,
 248                                                 uint32_t in_create_options,
 249                                                 const char *in_name)
 250 {
 251         struct tevent_req *req;
 252         struct smbd_smb2_create_state *state;
 253         NTSTATUS status;
 254         struct smb_request *smbreq;
 255         files_struct *result;
 256         int info;
 257         SMB_STRUCT_STAT sbuf;
 258
 259         req = tevent_req_create(mem_ctx, &state,
 260                                 struct smbd_smb2_create_state);
 261         if (req == NULL) {
 262                 return NULL;
 263         }
 264         state->smb2req = smb2req;
 265
 266         DEBUG(10,("smbd_smb2_create: name[%s]\n",
 267                   in_name));
 268
 269         smbreq = smbd_smb2_fake_smb_request(smb2req);
 270         if (tevent_req_nomem(smbreq, req)) {
 271                 return tevent_req_post(req, ev);
 272         }
 273
 274         if (IS_IPC(smbreq->conn)) {
 275                 const char *pipe_name = in_name;
 276
 277                 if (!lp_nt_pipe_support()) {
 278                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 279                         return tevent_req_post(req, ev);
 280                 }
 281
 282                 /* Strip \\ off the name. */
 283                 if (pipe_name[0] == '\\') {
 284                         pipe_name++;
 285                 }
 286
 287                 status = open_np_file(smbreq, pipe_name, &result);
 288                 if (!NT_STATUS_IS_OK(status)) {
 289                         tevent_req_nterror(req, status);
 290                         return tevent_req_post(req, ev);
 291                 }
 292                 info = FILE_WAS_OPENED;
 293                 ZERO_STRUCT(sbuf);
 294         } else if (CAN_PRINT(smbreq->conn)) {
 295                 status = file_new(smbreq, smbreq->conn, &result);
 296                 if(!NT_STATUS_IS_OK(status)) {
 297                         tevent_req_nterror(req, status);
 298                         return tevent_req_post(req, ev);
 299                 }
 300
 301                 status = print_fsp_open(smbreq,
 302                                         smbreq->conn,
 303                                         in_name,
 304                                         smbreq->vuid,
 305                                         result,
 306                                         &sbuf);
 307                 if (!NT_STATUS_IS_OK(status)) {
 308                         file_free(smbreq, result);
 309                         tevent_req_nterror(req, status);
 310                         return tevent_req_post(req, ev);
 311                 }
 312                 info = FILE_WAS_CREATED;
 313         } else {
 314                 char *fname;
 315                 struct smb_filename *smb_fname = NULL;
 316
 317                 /* these are ignored for SMB2 */
 318                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 319                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 320
 321                 fname = talloc_strdup(state, in_name);
 322                 if (tevent_req_nomem(fname, req)) {
 323                         return tevent_req_post(req, ev);
 324                 }
 325
 326                 /* convert '\\' into '/' */
 327                 status = check_path_syntax(fname);
 328                 if (!NT_STATUS_IS_OK(status)) {
 329                         tevent_req_nterror(req, status);
 330                         return tevent_req_post(req, ev);
 331                 }
 332
 333                 status = filename_convert(req,
 334                                           smbreq->conn,
 335                                           smbreq->flags2 & FLAGS2_DFS_PATHNAMES,
 336                                           fname,
 337                                           0,
 338                                           NULL,
 339                                           &smb_fname);
 340                 if (!NT_STATUS_IS_OK(status)) {
 341                         tevent_req_nterror(req, status);
 342                         return tevent_req_post(req, ev);
 343                 }
 344
 345                 status = SMB_VFS_CREATE_FILE(smbreq->conn,
 346                                              smbreq,
 347                                              0, /* root_dir_fid */
 348                                              smb_fname,
 349                                              in_desired_access,
 350                                              in_share_access,
 351                                              in_create_disposition,
 352                                              in_create_options,
 353                                              in_file_attributes,
 354                                              0, /* oplock_request */
 355                                              0, /* allocation_size */
 356                                              NULL, /* security_descriptor */
 357                                              NULL, /* ea_list */
 358                                              &result,
 359                                              &info);
 360                 if (!NT_STATUS_IS_OK(status)) {
 361                         tevent_req_nterror(req, status);
 362                         return tevent_req_post(req, ev);
 363                 }
 364                 sbuf = smb_fname->st;
 365         }
 366
 367         smb2req->compat_chain_fsp = smbreq->chain_fsp;
 368
 369         state->out_oplock_level = 0;
 370         if ((in_create_disposition == FILE_SUPERSEDE)
 371             && (info == FILE_WAS_OVERWRITTEN)) {
 372                 state->out_create_action = FILE_WAS_SUPERSEDED;
 373         } else {
 374                 state->out_create_action = info;
 375         }
 376         unix_timespec_to_nt_time(&state->out_creation_time, sbuf.st_ex_btime);
 377         unix_timespec_to_nt_time(&state->out_last_access_time, sbuf.st_ex_atime);
 378         unix_timespec_to_nt_time(&state->out_last_write_time,sbuf.st_ex_mtime);
 379         unix_timespec_to_nt_time(&state->out_change_time, sbuf.st_ex_ctime);
 380         state->out_allocation_size      = sbuf.st_ex_blksize * sbuf.st_ex_blocks;
 381         state->out_end_of_file          = sbuf.st_ex_size;
 382         state->out_file_attributes      = dos_mode(result->conn,
 383                                                    result->fsp_name);
 384         if (state->out_file_attributes == 0) {
 385                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
 386         }
 387         state->out_file_id_volatile = result->fnum;
 388
 389         tevent_req_done(req);
 390         return tevent_req_post(req, ev);
 391 }
 392
 393 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
 394                                       uint8_t *out_oplock_level,
 395                                       uint32_t *out_create_action,
 396                                       NTTIME *out_creation_time,
 397                                       NTTIME *out_last_access_time,
 398                                       NTTIME *out_last_write_time,
 399                                       NTTIME *out_change_time,
 400                                       uint64_t *out_allocation_size,
 401                                       uint64_t *out_end_of_file,
 402                                       uint32_t *out_file_attributes,
 403                                       uint64_t *out_file_id_volatile)
 404 {
 405         NTSTATUS status;
 406         struct smbd_smb2_create_state *state = tevent_req_data(req,
 407                                                struct smbd_smb2_create_state);
 408
 409         if (tevent_req_is_nterror(req, &status)) {
 410                 tevent_req_received(req);
 411                 return status;
 412         }
 413
 414         *out_oplock_level       = state->out_oplock_level;
 415         *out_create_action      = state->out_create_action;
 416         *out_creation_time      = state->out_creation_time;
 417         *out_last_access_time   = state->out_last_access_time;
 418         *out_last_write_time    = state->out_last_write_time;
 419         *out_change_time        = state->out_change_time;
 420         *out_allocation_size    = state->out_allocation_size;
 421         *out_end_of_file        = state->out_end_of_file;
 422         *out_file_attributes    = state->out_file_attributes;
 423         *out_file_id_volatile   = state->out_file_id_volatile;
 424
 425         tevent_req_received(req);
 426         return NT_STATUS_OK;
 427 }