source4/libcli/smb2/create.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    SMB2 client tree handling
   5
   6    Copyright (C) Andrew Tridgell 2005
   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 "libcli/raw/libcliraw.h"
  24 #include "libcli/raw/raw_proto.h"
  25 #include "libcli/smb2/smb2.h"
  26 #include "libcli/smb2/smb2_calls.h"
  27 #include "librpc/gen_ndr/ndr_security.h"
  28
  29 /*
  30   send a create request
  31 */
  32 struct smb2_request *smb2_create_send(struct smb2_tree *tree, struct smb2_create *io)
  33 {
  34         struct smb2_request *req;
  35         NTSTATUS status;
  36         DATA_BLOB blob;
  37         struct smb2_create_blobs blobs;
  38         int i;
  39
  40         ZERO_STRUCT(blobs);
  41
  42         req = smb2_request_init_tree(tree, SMB2_OP_CREATE, 0x38, true, 0);
  43         if (req == NULL) return NULL;
  44
  45         SCVAL(req->out.body, 0x02, io->in.security_flags);
  46         SCVAL(req->out.body, 0x03, io->in.oplock_level);
  47         SIVAL(req->out.body, 0x04, io->in.impersonation_level);
  48         SBVAL(req->out.body, 0x08, io->in.create_flags);
  49         SBVAL(req->out.body, 0x10, io->in.reserved);
  50         SIVAL(req->out.body, 0x18, io->in.desired_access);
  51         SIVAL(req->out.body, 0x1C, io->in.file_attributes);
  52         SIVAL(req->out.body, 0x20, io->in.share_access);
  53         SIVAL(req->out.body, 0x24, io->in.create_disposition);
  54         SIVAL(req->out.body, 0x28, io->in.create_options);
  55
  56         status = smb2_push_o16s16_string(&req->out, 0x2C, io->in.fname);
  57         if (!NT_STATUS_IS_OK(status)) {
  58                 talloc_free(req);
  59                 return NULL;
  60         }
  61
  62         /* now add all the optional blobs */
  63         if (io->in.eas.num_eas != 0) {
  64                 DATA_BLOB b = data_blob_talloc(req, NULL,
  65                                                ea_list_size_chained(io->in.eas.num_eas, io->in.eas.eas, 4));
  66                 ea_put_list_chained(b.data, io->in.eas.num_eas, io->in.eas.eas, 4);
  67                 status = smb2_create_blob_add(req, &blobs,
  68                                               SMB2_CREATE_TAG_EXTA, b);
  69                 if (!NT_STATUS_IS_OK(status)) {
  70                         talloc_free(req);
  71                         return NULL;
  72                 }
  73                 data_blob_free(&b);
  74         }
  75
  76         /* an empty MxAc tag seems to be used to ask the server to
  77            return the maximum access mask allowed on the file */
  78         if (io->in.query_maximal_access) {
  79                 /* TODO: MS-SMB2 2.2.13.2.5 says this can contain a timestamp? What to do
  80                    with that if it doesn't match? */
  81                 status = smb2_create_blob_add(req, &blobs,
  82                                               SMB2_CREATE_TAG_MXAC, data_blob(NULL, 0));
  83                 if (!NT_STATUS_IS_OK(status)) {
  84                         talloc_free(req);
  85                         return NULL;
  86                 }
  87         }
  88
  89         if (io->in.alloc_size != 0) {
  90                 uint8_t data[8];
  91                 SBVAL(data, 0, io->in.alloc_size);
  92                 status = smb2_create_blob_add(req, &blobs,
  93                                               SMB2_CREATE_TAG_ALSI, data_blob_const(data, 8));
  94                 if (!NT_STATUS_IS_OK(status)) {
  95                         talloc_free(req);
  96                         return NULL;
  97                 }
  98         }
  99
 100         if (io->in.durable_open) {
 101                 status = smb2_create_blob_add(req, &blobs,
 102                                               SMB2_CREATE_TAG_DHNQ, data_blob_talloc_zero(req, 16));
 103                 if (!NT_STATUS_IS_OK(status)) {
 104                         talloc_free(req);
 105                         return NULL;
 106                 }
 107         }
 108
 109         if (io->in.durable_open_v2) {
 110                 uint8_t data[32];
 111                 uint32_t flags = 0;
 112                 struct GUID_ndr_buf guid_buf = { .buf = {0}, };
 113
 114                 SIVAL(data, 0, io->in.timeout);
 115                 if (io->in.persistent_open) {
 116                         flags = SMB2_DHANDLE_FLAG_PERSISTENT;
 117                 }
 118                 SIVAL(data, 4, flags);
 119                 SBVAL(data, 8, 0x0); /* reserved */
 120                 status = GUID_to_ndr_buf(&io->in.create_guid, &guid_buf);
 121                 if (!NT_STATUS_IS_OK(status)) {
 122                         talloc_free(req);
 123                         return NULL;
 124                 }
 125                 memcpy(data+16, guid_buf.buf, sizeof(guid_buf.buf));
 126
 127                 status = smb2_create_blob_add(req, &blobs,
 128                                               SMB2_CREATE_TAG_DH2Q,
 129                                               data_blob_const(data, 32));
 130                 if (!NT_STATUS_IS_OK(status)) {
 131                         talloc_free(req);
 132                         return NULL;
 133                 }
 134         }
 135
 136         if (io->in.durable_handle) {
 137                 uint8_t data[16];
 138                 smb2_push_handle(data, io->in.durable_handle);
 139                 status = smb2_create_blob_add(req, &blobs,
 140                                               SMB2_CREATE_TAG_DHNC, data_blob_const(data, 16));
 141                 if (!NT_STATUS_IS_OK(status)) {
 142                         talloc_free(req);
 143                         return NULL;
 144                 }
 145         }
 146
 147         if (io->in.durable_handle_v2) {
 148                 uint8_t data[36];
 149                 struct GUID_ndr_buf guid_buf = { .buf = {0}, };
 150                 uint32_t flags = 0;
 151
 152                 smb2_push_handle(data, io->in.durable_handle_v2);
 153                 status = GUID_to_ndr_buf(&io->in.create_guid, &guid_buf);
 154                 if (!NT_STATUS_IS_OK(status)) {
 155                         talloc_free(req);
 156                         return NULL;
 157                 }
 158                 memcpy(data+16, guid_buf.buf, sizeof(guid_buf.buf));
 159                 if (io->in.persistent_open) {
 160                         flags = SMB2_DHANDLE_FLAG_PERSISTENT;
 161                 }
 162                 SIVAL(data, 32, flags);
 163
 164                 status = smb2_create_blob_add(req, &blobs,
 165                                               SMB2_CREATE_TAG_DH2C,
 166                                               data_blob_const(data, 36));
 167                 if (!NT_STATUS_IS_OK(status)) {
 168                         talloc_free(req);
 169                         return NULL;
 170                 }
 171         }
 172
 173         if (io->in.timewarp) {
 174                 uint8_t data[8];
 175                 SBVAL(data, 0, io->in.timewarp);
 176                 status = smb2_create_blob_add(req, &blobs,
 177                                               SMB2_CREATE_TAG_TWRP, data_blob_const(data, 8));
 178                 if (!NT_STATUS_IS_OK(status)) {
 179                         talloc_free(req);
 180                         return NULL;
 181                 }
 182         }
 183
 184         if (io->in.sec_desc) {
 185                 enum ndr_err_code ndr_err;
 186                 DATA_BLOB sd_blob;
 187                 ndr_err = ndr_push_struct_blob(&sd_blob, req, io->in.sec_desc,
 188                                                (ndr_push_flags_fn_t)ndr_push_security_descriptor);
 189                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 190                         talloc_free(req);
 191                         return NULL;
 192                 }
 193                 status = smb2_create_blob_add(req, &blobs,
 194                                               SMB2_CREATE_TAG_SECD, sd_blob);
 195                 if (!NT_STATUS_IS_OK(status)) {
 196                         talloc_free(req);
 197                         return NULL;
 198                 }
 199         }
 200
 201         if (io->in.query_on_disk_id) {
 202                 status = smb2_create_blob_add(req, &blobs,
 203                                               SMB2_CREATE_TAG_QFID, data_blob(NULL, 0));
 204                 if (!NT_STATUS_IS_OK(status)) {
 205                         talloc_free(req);
 206                         return NULL;
 207                 }
 208         }
 209
 210         if (io->in.lease_request) {
 211                 uint8_t data[32];
 212
 213                 if (!smb2_lease_push(io->in.lease_request, data,
 214                                      sizeof(data))) {
 215                         TALLOC_FREE(req);
 216                         return NULL;
 217                 }
 218
 219                 status = smb2_create_blob_add(
 220                         req, &blobs, SMB2_CREATE_TAG_RQLS,
 221                         data_blob_const(data, sizeof(data)));
 222                 if (!NT_STATUS_IS_OK(status)) {
 223                         talloc_free(req);
 224                         return NULL;
 225                 }
 226         }
 227
 228         if (io->in.lease_request_v2) {
 229                 uint8_t data[52];
 230
 231                 if (!smb2_lease_push(io->in.lease_request_v2, data,
 232                                      sizeof(data))) {
 233                         TALLOC_FREE(req);
 234                         return NULL;
 235                 }
 236
 237                 status = smb2_create_blob_add(
 238                         req, &blobs, SMB2_CREATE_TAG_RQLS,
 239                         data_blob_const(data, sizeof(data)));
 240                 if (!NT_STATUS_IS_OK(status)) {
 241                         talloc_free(req);
 242                         return NULL;
 243                 }
 244         }
 245
 246         if (io->in.app_instance_id) {
 247                 uint8_t data[20];
 248                 struct GUID_ndr_buf guid_buf = { .buf = {0}, };
 249
 250                 SSVAL(data, 0, 20); /* structure size */
 251                 SSVAL(data, 2, 0);  /* reserved */
 252
 253                 status = GUID_to_ndr_buf(io->in.app_instance_id, &guid_buf);
 254                 if (!NT_STATUS_IS_OK(status)) {
 255                         talloc_free(req);
 256                         return NULL;
 257                 }
 258                 memcpy(data+4, guid_buf.buf, sizeof(guid_buf.buf));
 259
 260                 status = smb2_create_blob_add(req, &blobs,
 261                                               SMB2_CREATE_TAG_APP_INSTANCE_ID,
 262                                               data_blob_const(data, 20));
 263                 if (!NT_STATUS_IS_OK(status)) {
 264                         talloc_free(req);
 265                         return NULL;
 266                 }
 267         }
 268
 269         /* and any custom blobs */
 270         for (i=0;i<io->in.blobs.num_blobs;i++) {
 271                 status = smb2_create_blob_add(req, &blobs,
 272                                               io->in.blobs.blobs[i].tag,
 273                                               io->in.blobs.blobs[i].data);
 274                 if (!NT_STATUS_IS_OK(status)) {
 275                         talloc_free(req);
 276                         return NULL;
 277                 }
 278         }
 279
 280
 281         status = smb2_create_blob_push(req, &blob, blobs);
 282         if (!NT_STATUS_IS_OK(status)) {
 283                 talloc_free(req);
 284                 return NULL;
 285         }
 286
 287         status = smb2_push_o32s32_blob(&req->out, 0x30, blob);
 288         if (!NT_STATUS_IS_OK(status)) {
 289                 talloc_free(req);
 290                 return NULL;
 291         }
 292
 293         if (((io->in.fname == NULL) || (strlen(io->in.fname) == 0)) &&
 294             (blob.length == 0)) {
 295                 struct smb2_request_buffer *buf = &req->out;
 296
 297                 status = smb2_grow_buffer(buf, 1);
 298                 if (!NT_STATUS_IS_OK(status)) {
 299                         talloc_free(req);
 300                         return NULL;
 301                 }
 302                 buf->dynamic[0] = 0;
 303                 buf->dynamic += 1;
 304                 buf->body_size += 1;
 305                 buf->size += 1;
 306         }
 307
 308         data_blob_free(&blob);
 309
 310         smb2_transport_send(req);
 311
 312         return req;
 313 }
 314
 315
 316 /*
 317   recv a create reply
 318 */
 319 NTSTATUS smb2_create_recv(struct smb2_request *req, TALLOC_CTX *mem_ctx, struct smb2_create *io)
 320 {
 321         NTSTATUS status;
 322         DATA_BLOB blob;
 323         int i;
 324
 325         if (!smb2_request_receive(req) ||
 326             !smb2_request_is_ok(req)) {
 327                 return smb2_request_destroy(req);
 328         }
 329
 330         SMB2_CHECK_PACKET_RECV(req, 0x58, true);
 331         ZERO_STRUCT(io->out);
 332         io->out.oplock_level   = CVAL(req->in.body, 0x02);
 333         io->out.reserved       = CVAL(req->in.body, 0x03);
 334         io->out.create_action  = IVAL(req->in.body, 0x04);
 335         io->out.create_time    = smbcli_pull_nttime(req->in.body, 0x08);
 336         io->out.access_time    = smbcli_pull_nttime(req->in.body, 0x10);
 337         io->out.write_time     = smbcli_pull_nttime(req->in.body, 0x18);
 338         io->out.change_time    = smbcli_pull_nttime(req->in.body, 0x20);
 339         io->out.alloc_size     = BVAL(req->in.body, 0x28);
 340         io->out.size           = BVAL(req->in.body, 0x30);
 341         io->out.file_attr      = IVAL(req->in.body, 0x38);
 342         io->out.reserved2      = IVAL(req->in.body, 0x3C);
 343         smb2_pull_handle(req->in.body+0x40, &io->out.file.handle);
 344         status = smb2_pull_o32s32_blob(&req->in, mem_ctx, req->in.body+0x50, &blob);
 345         if (!NT_STATUS_IS_OK(status)) {
 346                 smb2_request_destroy(req);
 347                 return status;
 348         }
 349
 350         status = smb2_create_blob_parse(mem_ctx, blob, &io->out.blobs);
 351         if (!NT_STATUS_IS_OK(status)) {
 352                 smb2_request_destroy(req);
 353                 return status;
 354         }
 355
 356         /* pull out the parsed blobs */
 357         for (i=0;i<io->out.blobs.num_blobs;i++) {
 358                 if (strcmp(io->out.blobs.blobs[i].tag, SMB2_CREATE_TAG_MXAC) == 0) {
 359                         if (io->out.blobs.blobs[i].data.length != 8) {
 360                                 smb2_request_destroy(req);
 361                                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 362                         }
 363                         io->out.maximal_access_status =
 364                                 IVAL(io->out.blobs.blobs[i].data.data, 0);
 365                         io->out.maximal_access = IVAL(io->out.blobs.blobs[i].data.data, 4);
 366                 }
 367                 if (strcmp(io->out.blobs.blobs[i].tag, SMB2_CREATE_TAG_QFID) == 0) {
 368                         if (io->out.blobs.blobs[i].data.length != 32) {
 369                                 smb2_request_destroy(req);
 370                                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 371                         }
 372                         memcpy(io->out.on_disk_id, io->out.blobs.blobs[i].data.data, 32);
 373                 }
 374                 if (strcmp(io->out.blobs.blobs[i].tag, SMB2_CREATE_TAG_RQLS) == 0) {
 375                         struct smb2_lease *ls = NULL;
 376                         uint8_t *data;
 377
 378                         ZERO_STRUCT(io->out.lease_response);
 379                         ZERO_STRUCT(io->out.lease_response_v2);
 380
 381                         switch (io->out.blobs.blobs[i].data.length) {
 382                         case 32:
 383                                 ls = &io->out.lease_response;
 384                                 ls->lease_version = 1;
 385                                 break;
 386                         case 52:
 387                                 ls = &io->out.lease_response_v2;
 388                                 ls->lease_version = 2;
 389                                 break;
 390                         default:
 391                                 smb2_request_destroy(req);
 392                                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 393                         }
 394
 395                         data = io->out.blobs.blobs[i].data.data;
 396                         memcpy(&ls->lease_key, data, 16);
 397                         ls->lease_state = IVAL(data, 16);
 398                         ls->lease_flags = IVAL(data, 20);
 399                         ls->lease_duration = BVAL(data, 24);
 400
 401                         if (io->out.blobs.blobs[i].data.length == 52) {
 402                                 memcpy(&ls->parent_lease_key, data+32, 16);
 403                                 ls->lease_epoch = SVAL(data, 48);
 404                         }
 405                 }
 406                 if (strcmp(io->out.blobs.blobs[i].tag, SMB2_CREATE_TAG_DHNQ) == 0) {
 407                         if (io->out.blobs.blobs[i].data.length != 8) {
 408                                 smb2_request_destroy(req);
 409                                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 410                         }
 411                         io->out.durable_open = true;
 412                 }
 413                 if (strcmp(io->out.blobs.blobs[i].tag, SMB2_CREATE_TAG_DH2Q) == 0) {
 414                         uint32_t flags;
 415                         uint8_t *data;
 416
 417                         if (io->out.blobs.blobs[i].data.length != 8) {
 418                                 smb2_request_destroy(req);
 419                                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 420                         }
 421
 422                         io->out.durable_open = false;
 423                         io->out.durable_open_v2 = true;
 424
 425                         data = io->out.blobs.blobs[i].data.data;
 426                         io->out.timeout = IVAL(data, 0);
 427                         flags = IVAL(data, 4);
 428                         if ((flags & SMB2_DHANDLE_FLAG_PERSISTENT) != 0) {
 429                                 io->out.persistent_open = true;
 430                         }
 431                 }
 432         }
 433
 434         data_blob_free(&blob);
 435
 436         return smb2_request_destroy(req);
 437 }
 438
 439 /*
 440   sync create request
 441 */
 442 NTSTATUS smb2_create(struct smb2_tree *tree, TALLOC_CTX *mem_ctx, struct smb2_create *io)
 443 {
 444         struct smb2_request *req = smb2_create_send(tree, io);
 445         return smb2_create_recv(req, mem_ctx, io);
 446 }