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 "../source4/libcli/smb2/smb2_constants.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->conn->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         if (tevent_req_is_in_progress(subreq)) {
 130                 return smbd_smb2_request_pending_queue(req);
 131         }
 132
 133         return NT_STATUS_OK;
 134 }
 135
 136 static void smbd_smb2_request_create_done(struct tevent_req *subreq)
 137 {
 138         struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
 139                                         struct smbd_smb2_request);
 140         int i = req->current_idx;
 141         uint8_t *outhdr;
 142         DATA_BLOB outbody;
 143         DATA_BLOB outdyn;
 144         uint8_t out_oplock_level;
 145         uint32_t out_create_action;
 146         NTTIME out_creation_time;
 147         NTTIME out_last_access_time;
 148         NTTIME out_last_write_time;
 149         NTTIME out_change_time;
 150         uint64_t out_allocation_size;
 151         uint64_t out_end_of_file;
 152         uint32_t out_file_attributes;
 153         uint64_t out_file_id_volatile;
 154         NTSTATUS status;
 155         NTSTATUS error; /* transport error */
 156
 157         status = smbd_smb2_create_recv(subreq,
 158                                        &out_oplock_level,
 159                                        &out_create_action,
 160                                        &out_creation_time,
 161                                        &out_last_access_time,
 162                                        &out_last_write_time,
 163                                        &out_change_time,
 164                                        &out_allocation_size,
 165                                        &out_end_of_file,
 166                                        &out_file_attributes,
 167                                        &out_file_id_volatile);
 168         TALLOC_FREE(subreq);
 169         if (!NT_STATUS_IS_OK(status)) {
 170                 error = smbd_smb2_request_error(req, status);
 171                 if (!NT_STATUS_IS_OK(error)) {
 172                         smbd_server_connection_terminate(req->conn,
 173                                                          nt_errstr(error));
 174                         return;
 175                 }
 176                 return;
 177         }
 178
 179         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 180
 181         outbody = data_blob_talloc(req->out.vector, NULL, 0x58);
 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->conn,
 186                                                          nt_errstr(error));
 187                         return;
 188                 }
 189                 return;
 190         }
 191
 192         SSVAL(outbody.data, 0x00, 0x58 + 1);    /* struct size */
 193         SCVAL(outbody.data, 0x02,
 194               out_oplock_level);                /* oplock level */
 195         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 196         SIVAL(outbody.data, 0x04,
 197               out_create_action);               /* create action */
 198         SBVAL(outbody.data, 0x08,
 199               out_creation_time);               /* creation time */
 200         SBVAL(outbody.data, 0x10,
 201               out_last_access_time);            /* last access time */
 202         SBVAL(outbody.data, 0x18,
 203               out_last_write_time);             /* last write time */
 204         SBVAL(outbody.data, 0x20,
 205               out_change_time);                 /* change time */
 206         SBVAL(outbody.data, 0x28,
 207               out_allocation_size);             /* allocation size */
 208         SBVAL(outbody.data, 0x30,
 209               out_end_of_file);                 /* end of file */
 210         SIVAL(outbody.data, 0x38,
 211               out_file_attributes);             /* file attributes */
 212         SIVAL(outbody.data, 0x3C, 0);           /* reserved */
 213         SBVAL(outbody.data, 0x40, 0);           /* file id (persistent) */
 214         SBVAL(outbody.data, 0x48,
 215               out_file_id_volatile);            /* file id (volatile) */
 216         SIVAL(outbody.data, 0x50, 0);           /* create contexts offset */
 217         SIVAL(outbody.data, 0x54, 0);           /* create contexts length */
 218
 219         outdyn = data_blob_const(NULL, 0);
 220
 221         error = smbd_smb2_request_done(req, outbody, &outdyn);
 222         if (!NT_STATUS_IS_OK(error)) {
 223                 smbd_server_connection_terminate(req->conn,
 224                                                  nt_errstr(error));
 225                 return;
 226         }
 227 }
 228
 229 struct smbd_smb2_create_state {
 230         struct smbd_smb2_request *smb2req;
 231         uint8_t out_oplock_level;
 232         uint32_t out_create_action;
 233         NTTIME out_creation_time;
 234         NTTIME out_last_access_time;
 235         NTTIME out_last_write_time;
 236         NTTIME out_change_time;
 237         uint64_t out_allocation_size;
 238         uint64_t out_end_of_file;
 239         uint32_t out_file_attributes;
 240         uint64_t out_file_id_volatile;
 241 };
 242
 243 static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
 244                                                 struct tevent_context *ev,
 245                                                 struct smbd_smb2_request *smb2req,
 246                                                 uint8_t in_oplock_level,
 247                                                 uint32_t in_impersonation_level,
 248                                                 uint32_t in_desired_access,
 249                                                 uint32_t in_file_attributes,
 250                                                 uint32_t in_share_access,
 251                                                 uint32_t in_create_disposition,
 252                                                 uint32_t in_create_options,
 253                                                 const char *in_name)
 254 {
 255         struct tevent_req *req;
 256         struct smbd_smb2_create_state *state;
 257         NTSTATUS status;
 258         struct smb_request *smbreq;
 259         files_struct *result;
 260         int info;
 261         SMB_STRUCT_STAT sbuf;
 262
 263         req = tevent_req_create(mem_ctx, &state,
 264                                 struct smbd_smb2_create_state);
 265         if (req == NULL) {
 266                 return NULL;
 267         }
 268         state->smb2req = smb2req;
 269
 270         DEBUG(10,("smbd_smb2_create: name[%s]\n",
 271                   in_name));
 272
 273         smbreq = smbd_smb2_fake_smb_request(smb2req);
 274         if (tevent_req_nomem(smbreq, req)) {
 275                 goto out;
 276         }
 277
 278         if (IS_IPC(smbreq->conn)) {
 279                 const char *pipe_name = in_name;
 280
 281                 if (!lp_nt_pipe_support()) {
 282                         tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
 283                         goto out;
 284                 }
 285
 286                 /* Strip \\ off the name. */
 287                 if (pipe_name[0] == '\\') {
 288                         pipe_name++;
 289                 }
 290
 291                 status = open_np_file(smbreq, pipe_name, &result);
 292                 if (!NT_STATUS_IS_OK(status)) {
 293                         tevent_req_nterror(req, status);
 294                         goto out;
 295                 }
 296                 info = FILE_WAS_OPENED;
 297                 ZERO_STRUCT(sbuf);
 298         } else if (CAN_PRINT(smbreq->conn)) {
 299                 status = file_new(smbreq, smbreq->conn, &result);
 300                 if(!NT_STATUS_IS_OK(status)) {
 301                         tevent_req_nterror(req, status);
 302                         goto out;
 303                 }
 304
 305                 status = print_fsp_open(smbreq,
 306                                         smbreq->conn,
 307                                         in_name,
 308                                         smbreq->vuid,
 309                                         result,
 310                                         &sbuf);
 311                 if (!NT_STATUS_IS_OK(status)) {
 312                         file_free(smbreq, result);
 313                         tevent_req_nterror(req, status);
 314                         goto out;
 315                 }
 316                 info = FILE_WAS_CREATED;
 317         } else {
 318                 struct smb_filename *smb_fname = NULL;
 319
 320                 /* these are ignored for SMB2 */
 321                 in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 322                 in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 323
 324                 status = filename_convert(talloc_tos(),
 325                                         smbreq->conn,
 326                                         smbreq->flags2 & FLAGS2_DFS_PATHNAMES,
 327                                         in_name,
 328                                         &smb_fname);
 329                 if (!NT_STATUS_IS_OK(status)) {
 330                         tevent_req_nterror(req, status);
 331                         TALLOC_FREE(smb_fname);
 332                         goto out;
 333                 }
 334
 335                 status = SMB_VFS_CREATE_FILE(smbreq->conn,
 336                                              smbreq,
 337                                              0, /* root_dir_fid */
 338                                              smb_fname,
 339                                              in_desired_access,
 340                                              in_share_access,
 341                                              in_create_disposition,
 342                                              in_create_options,
 343                                              in_file_attributes,
 344                                              0, /* oplock_request */
 345                                              0, /* allocation_size */
 346                                              NULL, /* security_descriptor */
 347                                              NULL, /* ea_list */
 348                                              &result,
 349                                              &info);
 350                 if (!NT_STATUS_IS_OK(status)) {
 351                         tevent_req_nterror(req, status);
 352                         TALLOC_FREE(smb_fname);
 353                         goto out;
 354                 }
 355                 sbuf = smb_fname->st;
 356                 TALLOC_FREE(smb_fname);
 357         }
 358
 359         smb2req->compat_chain_fsp = smbreq->chain_fsp;
 360
 361         state->out_oplock_level = 0;
 362         if ((in_create_disposition == FILE_SUPERSEDE)
 363             && (info == FILE_WAS_OVERWRITTEN)) {
 364                 state->out_create_action = FILE_WAS_SUPERSEDED;
 365         } else {
 366                 state->out_create_action = info;
 367         }
 368         unix_timespec_to_nt_time(&state->out_creation_time, sbuf.st_ex_btime);
 369         unix_timespec_to_nt_time(&state->out_last_access_time, sbuf.st_ex_atime);
 370         unix_timespec_to_nt_time(&state->out_last_write_time,sbuf.st_ex_mtime);
 371         unix_timespec_to_nt_time(&state->out_change_time, sbuf.st_ex_ctime);
 372         state->out_allocation_size      = sbuf.st_ex_blksize * sbuf.st_ex_blocks;
 373         state->out_end_of_file          = sbuf.st_ex_size;
 374         state->out_file_attributes      = dos_mode(result->conn,
 375                                                    result->fsp_name);
 376         if (state->out_file_attributes == 0) {
 377                 state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
 378         }
 379         state->out_file_id_volatile = result->fnum;
 380
 381         tevent_req_done(req);
 382  out:
 383         return tevent_req_post(req, ev);
 384 }
 385
 386 static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
 387                                       uint8_t *out_oplock_level,
 388                                       uint32_t *out_create_action,
 389                                       NTTIME *out_creation_time,
 390                                       NTTIME *out_last_access_time,
 391                                       NTTIME *out_last_write_time,
 392                                       NTTIME *out_change_time,
 393                                       uint64_t *out_allocation_size,
 394                                       uint64_t *out_end_of_file,
 395                                       uint32_t *out_file_attributes,
 396                                       uint64_t *out_file_id_volatile)
 397 {
 398         NTSTATUS status;
 399         struct smbd_smb2_create_state *state = tevent_req_data(req,
 400                                                struct smbd_smb2_create_state);
 401
 402         if (tevent_req_is_nterror(req, &status)) {
 403                 tevent_req_received(req);
 404                 return status;
 405         }
 406
 407         *out_oplock_level       = state->out_oplock_level;
 408         *out_create_action      = state->out_create_action;
 409         *out_creation_time      = state->out_creation_time;
 410         *out_last_access_time   = state->out_last_access_time;
 411         *out_last_write_time    = state->out_last_write_time;
 412         *out_change_time        = state->out_change_time;
 413         *out_allocation_size    = state->out_allocation_size;
 414         *out_end_of_file        = state->out_end_of_file;
 415         *out_file_attributes    = state->out_file_attributes;
 416         *out_file_id_volatile   = state->out_file_id_volatile;
 417
 418         tevent_req_received(req);
 419         return NT_STATUS_OK;
 420 }