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 NTSTATUS smbd_smb2_create(struct smbd_smb2_request *req,
  26                                  uint8_t in_oplock_level,
  27                                  uint32_t in_impersonation_level,
  28                                  uint32_t in_desired_access,
  29                                  uint32_t in_file_attributes,
  30                                  uint32_t in_share_access,
  31                                  uint32_t in_create_disposition,
  32                                  uint32_t in_create_options,
  33                                  const char *in_name,
  34                                  uint8_t *out_oplock_level,
  35                                  uint32_t *out_create_action,
  36                                  NTTIME *out_creation_time,
  37                                  NTTIME *out_last_access_time,
  38                                  NTTIME *out_last_write_time,
  39                                  NTTIME *out_change_time,
  40                                  uint64_t *out_allocation_size,
  41                                  uint64_t *out_end_of_file,
  42                                  uint32_t *out_file_attributes,
  43                                  uint64_t *out_file_id_volatile);
  44
  45 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req)
  46 {
  47         const uint8_t *inbody;
  48         int i = req->current_idx;
  49         uint8_t *outhdr;
  50         DATA_BLOB outbody;
  51         DATA_BLOB outdyn;
  52         size_t expected_body_size = 0x39;
  53         size_t body_size;
  54         uint8_t in_oplock_level;
  55         uint32_t in_impersonation_level;
  56         uint32_t in_desired_access;
  57         uint32_t in_file_attributes;
  58         uint32_t in_share_access;
  59         uint32_t in_create_disposition;
  60         uint32_t in_create_options;
  61         uint16_t in_name_offset;
  62         uint16_t in_name_length;
  63         DATA_BLOB in_name_buffer;
  64         char *in_name_string;
  65         size_t in_name_string_size;
  66         uint8_t out_oplock_level;
  67         uint32_t out_create_action;
  68         NTTIME out_creation_time;
  69         NTTIME out_last_access_time;
  70         NTTIME out_last_write_time;
  71         NTTIME out_change_time;
  72         uint64_t out_allocation_size;
  73         uint64_t out_end_of_file;
  74         uint32_t out_file_attributes;
  75         uint64_t out_file_id_volatile;
  76         NTSTATUS status;
  77         bool ok;
  78
  79         if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
  80                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  81         }
  82
  83         inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
  84
  85         body_size = SVAL(inbody, 0x00);
  86         if (body_size != expected_body_size) {
  87                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
  88         }
  89
  90         in_oplock_level         = CVAL(inbody, 0x03);
  91         in_impersonation_level  = IVAL(inbody, 0x04);
  92         in_desired_access       = IVAL(inbody, 0x18);
  93         in_file_attributes      = IVAL(inbody, 0x1C);
  94         in_share_access         = IVAL(inbody, 0x20);
  95         in_create_disposition   = IVAL(inbody, 0x24);
  96         in_create_options       = IVAL(inbody, 0x28);
  97         in_name_offset          = SVAL(inbody, 0x2C);
  98         in_name_length          = SVAL(inbody, 0x2E);
  99
 100         if (in_name_offset != (SMB2_HDR_BODY + (body_size & 0xFFFFFFFE))) {
 101                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 102         }
 103
 104         if (in_name_length > req->in.vector[i+2].iov_len) {
 105                 return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
 106         }
 107
 108         in_name_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base;
 109         in_name_buffer.length = in_name_length;
 110
 111         ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
 112                                    in_name_buffer.data,
 113                                    in_name_buffer.length,
 114                                    &in_name_string,
 115                                    &in_name_string_size, false);
 116         if (!ok) {
 117                 return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
 118         }
 119
 120         status = smbd_smb2_create(req,
 121                                   in_oplock_level,
 122                                   in_impersonation_level,
 123                                   in_desired_access,
 124                                   in_file_attributes,
 125                                   in_share_access,
 126                                   in_create_disposition,
 127                                   in_create_options,
 128                                   in_name_string,
 129                                   &out_oplock_level,
 130                                   &out_create_action,
 131                                   &out_creation_time,
 132                                   &out_last_access_time,
 133                                   &out_last_write_time,
 134                                   &out_change_time,
 135                                   &out_allocation_size,
 136                                   &out_end_of_file,
 137                                   &out_file_attributes,
 138                                   &out_file_id_volatile);
 139         if (!NT_STATUS_IS_OK(status)) {
 140                 return smbd_smb2_request_error(req, status);
 141         }
 142
 143         outhdr = (uint8_t *)req->out.vector[i].iov_base;
 144
 145         outbody = data_blob_talloc(req->out.vector, NULL, 0x58);
 146         if (outbody.data == NULL) {
 147                 return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
 148         }
 149
 150         SSVAL(outbody.data, 0x00, 0x58 + 1);    /* struct size */
 151         SCVAL(outbody.data, 0x02,
 152               out_oplock_level);                /* oplock level */
 153         SCVAL(outbody.data, 0x03, 0);           /* reserved */
 154         SIVAL(outbody.data, 0x04,
 155               out_create_action);               /* create action */
 156         SBVAL(outbody.data, 0x08,
 157               out_creation_time);               /* creation time */
 158         SBVAL(outbody.data, 0x10,
 159               out_last_access_time);            /* last access time */
 160         SBVAL(outbody.data, 0x18,
 161               out_last_write_time);             /* last write time */
 162         SBVAL(outbody.data, 0x20,
 163               out_change_time);                 /* change time */
 164         SBVAL(outbody.data, 0x28,
 165               out_allocation_size);             /* allocation size */
 166         SBVAL(outbody.data, 0x30,
 167               out_end_of_file);                 /* end of file */
 168         SIVAL(outbody.data, 0x38,
 169               out_file_attributes);             /* file attributes */
 170         SIVAL(outbody.data, 0x3C, 0);           /* reserved */
 171         SBVAL(outbody.data, 0x40, 0);           /* file id (persistent) */
 172         SBVAL(outbody.data, 0x48,
 173               out_file_id_volatile);            /* file id (volatile) */
 174         SIVAL(outbody.data, 0x50, 0);           /* create contexts offset */
 175         SIVAL(outbody.data, 0x54, 0);           /* create contexts length */
 176
 177         outdyn = data_blob_const(NULL, 0);
 178
 179         return smbd_smb2_request_done(req, outbody, &outdyn);
 180 }
 181
 182 static NTSTATUS smbd_smb2_create(struct smbd_smb2_request *req,
 183                                  uint8_t in_oplock_level,
 184                                  uint32_t in_impersonation_level,
 185                                  uint32_t in_desired_access,
 186                                  uint32_t in_file_attributes,
 187                                  uint32_t in_share_access,
 188                                  uint32_t in_create_disposition,
 189                                  uint32_t in_create_options,
 190                                  const char *in_name,
 191                                  uint8_t *out_oplock_level,
 192                                  uint32_t *out_create_action,
 193                                  NTTIME *out_creation_time,
 194                                  NTTIME *out_last_access_time,
 195                                  NTTIME *out_last_write_time,
 196                                  NTTIME *out_change_time,
 197                                  uint64_t *out_allocation_size,
 198                                  uint64_t *out_end_of_file,
 199                                  uint32_t *out_file_attributes,
 200                                  uint64_t *out_file_id_volatile)
 201 {
 202         NTSTATUS status;
 203         struct smb_request *smbreq;
 204         files_struct *result;
 205         int info;
 206         SMB_STRUCT_STAT sbuf;
 207
 208         DEBUG(10,("smbd_smb2_create: name[%s]\n",
 209                   in_name));
 210
 211         smbreq = smbd_smb2_fake_smb_request(req);
 212         if (smbreq == NULL) {
 213                 return NT_STATUS_NO_MEMORY;
 214         }
 215
 216         /* If it's an IPC, pass off the pipe handler. */
 217         if (IS_IPC(req->tcon->compat_conn)) {
 218                 return NT_STATUS_NOT_IMPLEMENTED;
 219         }
 220
 221         if (CAN_PRINT(req->tcon->compat_conn)) {
 222                 return NT_STATUS_NOT_IMPLEMENTED;
 223         }
 224
 225         switch (in_oplock_level) {
 226         case SMB2_OPLOCK_LEVEL_BATCH:
 227                 break;
 228         case SMB2_OPLOCK_LEVEL_EXCLUSIVE:
 229                 break;
 230         default:
 231                 break;
 232         }
 233
 234         /* these are ignored for SMB2 */
 235         in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
 236         in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
 237
 238         status = SMB_VFS_CREATE_FILE(req->tcon->compat_conn,
 239                                      smbreq,
 240                                      0, /* root_dir_fid */
 241                                      in_name,
 242                                      CFF_DOS_PATH, /* create_file_flags */
 243                                      in_desired_access,
 244                                      in_share_access,
 245                                      in_create_disposition,
 246                                      in_create_options,
 247                                      in_file_attributes,
 248                                      0, /* oplock_request */
 249                                      0, /* allocation_size */
 250                                      NULL, /* security_descriptor */
 251                                      NULL, /* ea_list */
 252                                      &result,
 253                                      &info,
 254                                      &sbuf);
 255         if (!NT_STATUS_IS_OK(status)) {
 256                 return status;
 257         }
 258
 259         *out_oplock_level       = 0;
 260         if ((in_create_disposition == FILE_SUPERSEDE)
 261             && (info == FILE_WAS_OVERWRITTEN)) {
 262                 *out_create_action = FILE_WAS_SUPERSEDED;
 263         } else {
 264                 *out_create_action = info;
 265         }
 266         unix_timespec_to_nt_time(out_creation_time, sbuf.st_ex_btime);
 267         unix_timespec_to_nt_time(out_last_access_time, sbuf.st_ex_atime);
 268         unix_timespec_to_nt_time(out_last_write_time,sbuf.st_ex_mtime);
 269         unix_timespec_to_nt_time(out_change_time, sbuf.st_ex_ctime);
 270         *out_allocation_size    = sbuf.st_ex_blksize * sbuf.st_ex_blocks;
 271         *out_end_of_file        = sbuf.st_ex_size;
 272         *out_file_attributes    = dos_mode(result->conn,result->fsp_name,&sbuf);
 273         if (*out_file_attributes == 0) {
 274                 *out_file_attributes = FILE_ATTRIBUTE_NORMAL;
 275         }
 276         *out_file_id_volatile = result->fnum;
 277         return NT_STATUS_OK;
 278 }