source3/libsmb/smb2cli_create.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    smb2 lib
   4    Copyright (C) Volker Lendecke 2011
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "client.h"
  22 #include "async_smb.h"
  23 #include "../libcli/smb/smbXcli_base.h"
  24 #include "smb2cli.h"
  25 #include "libsmb/proto.h"
  26 #include "lib/util/tevent_ntstatus.h"
  27 #include "libcli/smb/smb2_create_blob.h"
  28
  29 struct smb2cli_create_state {
  30         uint8_t fixed[56];
  31
  32         uint8_t oplock_level;
  33         uint32_t create_action;
  34         struct timespec creation_time;
  35         struct timespec last_access_time;
  36         struct timespec last_write_time;
  37         struct timespec change_time;
  38         uint64_t allocation_size;
  39         uint64_t end_of_file;
  40         uint32_t file_attributes;
  41         uint64_t fid_persistent;
  42         uint64_t fid_volatile;
  43         struct smb2_create_blobs blobs;
  44 };
  45
  46 static void smb2cli_create_done(struct tevent_req *subreq);
  47
  48 struct tevent_req *smb2cli_create_send(
  49         TALLOC_CTX *mem_ctx,
  50         struct tevent_context *ev,
  51         struct cli_state *cli,
  52         const char *filename,
  53         uint8_t  oplock_level,          /* SMB2_OPLOCK_LEVEL_* */
  54         uint32_t impersonation_level,   /* SMB2_IMPERSONATION_* */
  55         uint32_t desired_access,
  56         uint32_t file_attributes,
  57         uint32_t share_access,
  58         uint32_t create_disposition,
  59         uint32_t create_options,
  60         struct smb2_create_blobs *blobs)
  61 {
  62         struct tevent_req *req, *subreq;
  63         struct smb2cli_create_state *state;
  64         uint8_t *fixed;
  65         uint8_t *name_utf16;
  66         size_t name_utf16_len;
  67         DATA_BLOB blob;
  68         NTSTATUS status;
  69         size_t blobs_offset;
  70         uint8_t *dyn;
  71         size_t dyn_len;
  72
  73         req = tevent_req_create(mem_ctx, &state,
  74                                 struct smb2cli_create_state);
  75         if (req == NULL) {
  76                 return NULL;
  77         }
  78
  79         if (!convert_string_talloc(state, CH_UNIX, CH_UTF16,
  80                                    filename, strlen(filename),
  81                                    &name_utf16, &name_utf16_len)) {
  82                 tevent_req_oom(req);
  83                 return tevent_req_post(req, ev);
  84         }
  85
  86         if (strlen(filename) == 0) {
  87                 TALLOC_FREE(name_utf16);
  88                 name_utf16_len = 0;
  89         }
  90
  91         fixed = state->fixed;
  92
  93         SSVAL(fixed, 0, 57);
  94         SCVAL(fixed, 3, oplock_level);
  95         SIVAL(fixed, 4, impersonation_level);
  96         SIVAL(fixed, 24, desired_access);
  97         SIVAL(fixed, 28, file_attributes);
  98         SIVAL(fixed, 32, share_access);
  99         SIVAL(fixed, 36, create_disposition);
 100         SIVAL(fixed, 40, create_options);
 101
 102         SSVAL(fixed, 44, SMB2_HDR_BODY + 56);
 103         SSVAL(fixed, 46, name_utf16_len);
 104
 105         blob = data_blob_null;
 106
 107         if (blobs != NULL) {
 108                 status = smb2_create_blob_push(state, &blob, *blobs);
 109                 if (tevent_req_nterror(req, status)) {
 110                         return tevent_req_post(req, ev);
 111                 }
 112         }
 113
 114         blobs_offset = name_utf16_len;
 115         blobs_offset = ((blobs_offset + 3) & ~3);
 116
 117         if (blob.length > 0) {
 118                 SIVAL(fixed, 48, blobs_offset + SMB2_HDR_BODY + 56);
 119                 SIVAL(fixed, 52, blob.length);
 120         }
 121
 122         dyn_len = MAX(1, blobs_offset + blob.length);
 123         dyn = talloc_zero_array(state, uint8_t, dyn_len);
 124         if (tevent_req_nomem(dyn, req)) {
 125                 return tevent_req_post(req, ev);
 126         }
 127
 128         if (name_utf16) {
 129                 memcpy(dyn, name_utf16, name_utf16_len);
 130                 TALLOC_FREE(name_utf16);
 131         }
 132
 133         if (blob.data != NULL) {
 134                 memcpy(dyn + blobs_offset,
 135                        blob.data, blob.length);
 136                 data_blob_free(&blob);
 137         }
 138
 139         subreq = smb2cli_req_send(state, ev, cli->conn, SMB2_OP_CREATE,
 140                                   0, 0, /* flags */
 141                                   cli->timeout,
 142                                   cli->smb2.pid,
 143                                   cli->smb2.tid,
 144                                   cli->smb2.session,
 145                                   state->fixed, sizeof(state->fixed),
 146                                   dyn, dyn_len);
 147         if (tevent_req_nomem(subreq, req)) {
 148                 return tevent_req_post(req, ev);
 149         }
 150         tevent_req_set_callback(subreq, smb2cli_create_done, req);
 151         return req;
 152 }
 153
 154 static void smb2cli_create_done(struct tevent_req *subreq)
 155 {
 156         struct tevent_req *req =
 157                 tevent_req_callback_data(subreq,
 158                 struct tevent_req);
 159         struct smb2cli_create_state *state =
 160                 tevent_req_data(req,
 161                 struct smb2cli_create_state);
 162         NTSTATUS status;
 163         struct iovec *iov;
 164         uint8_t *body;
 165         uint32_t offset, length;
 166         static const struct smb2cli_req_expected_response expected[] = {
 167         {
 168                 .status = NT_STATUS_OK,
 169                 .body_size = 0x59
 170         }
 171         };
 172
 173         status = smb2cli_req_recv(subreq, state, &iov,
 174                                   expected, ARRAY_SIZE(expected));
 175         if (tevent_req_nterror(req, status)) {
 176                 return;
 177         }
 178
 179         body = (uint8_t *)iov[1].iov_base;
 180
 181         state->oplock_level     = CVAL(body, 2);
 182         state->create_action    = IVAL(body, 4);
 183         state->creation_time    = interpret_long_date((char *)body + 8);
 184         state->last_access_time = interpret_long_date((char *)body + 16);
 185         state->last_write_time  = interpret_long_date((char *)body + 24);
 186         state->change_time      = interpret_long_date((char *)body + 32);
 187         state->allocation_size  = BVAL(body, 40);
 188         state->end_of_file      = BVAL(body, 48);
 189         state->file_attributes  = IVAL(body, 56);
 190         state->fid_persistent   = BVAL(body, 64);
 191         state->fid_volatile     = BVAL(body, 72);
 192
 193         offset = IVAL(body, 80);
 194         length = IVAL(body, 84);
 195
 196         if ((offset != 0) && (length != 0)) {
 197                 if ((offset != SMB2_HDR_BODY + 88) ||
 198                     (length > iov[2].iov_len)) {
 199                         tevent_req_nterror(
 200                                 req, NT_STATUS_INVALID_NETWORK_RESPONSE);
 201                         return;
 202                 }
 203                 status = smb2_create_blob_parse(
 204                         state, data_blob_const(iov[2].iov_base, length),
 205                         &state->blobs);
 206                 if (tevent_req_nterror(req, status)) {
 207                         return;
 208                 }
 209         }
 210         tevent_req_done(req);
 211 }
 212
 213 NTSTATUS smb2cli_create_recv(struct tevent_req *req,
 214                              uint64_t *fid_persistent,
 215                              uint64_t *fid_volatile)
 216 {
 217         struct smb2cli_create_state *state =
 218                 tevent_req_data(req,
 219                 struct smb2cli_create_state);
 220         NTSTATUS status;
 221
 222         if (tevent_req_is_nterror(req, &status)) {
 223                 return status;
 224         }
 225         *fid_persistent = state->fid_persistent;
 226         *fid_volatile = state->fid_volatile;
 227         return NT_STATUS_OK;
 228 }
 229
 230 NTSTATUS smb2cli_create(struct cli_state *cli,
 231                         const char *filename,
 232                         uint8_t  oplock_level,       /* SMB2_OPLOCK_LEVEL_* */
 233                         uint32_t impersonation_level, /* SMB2_IMPERSONATION_* */
 234                         uint32_t desired_access,
 235                         uint32_t file_attributes,
 236                         uint32_t share_access,
 237                         uint32_t create_disposition,
 238                         uint32_t create_options,
 239                         struct smb2_create_blobs *blobs,
 240                         uint64_t *fid_persistent,
 241                         uint64_t *fid_volatile)
 242 {
 243         TALLOC_CTX *frame = talloc_stackframe();
 244         struct event_context *ev;
 245         struct tevent_req *req;
 246         NTSTATUS status = NT_STATUS_NO_MEMORY;
 247
 248         if (cli_has_async_calls(cli)) {
 249                 /*
 250                  * Can't use sync call while an async call is in flight
 251                  */
 252                 status = NT_STATUS_INVALID_PARAMETER;
 253                 goto fail;
 254         }
 255         ev = event_context_init(frame);
 256         if (ev == NULL) {
 257                 goto fail;
 258         }
 259         req = smb2cli_create_send(frame, ev, cli, filename, oplock_level,
 260                                   impersonation_level, desired_access,
 261                                   file_attributes, share_access,
 262                                   create_disposition, create_options,
 263                                   blobs);
 264         if (req == NULL) {
 265                 goto fail;
 266         }
 267         if (!tevent_req_poll_ntstatus(req, ev, &status)) {
 268                 goto fail;
 269         }
 270         status = smb2cli_create_recv(req, fid_persistent, fid_volatile);
 271  fail:
 272         TALLOC_FREE(frame);
 273         return status;
 274 }