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_handle) {
 110                 uint8_t data[16];
 111                 smb2_push_handle(data, io->in.durable_handle);
 112                 status = smb2_create_blob_add(req, &blobs,
 113                                               SMB2_CREATE_TAG_DHNC, data_blob_const(data, 16));
 114                 if (!NT_STATUS_IS_OK(status)) {
 115                         talloc_free(req);
 116                         return NULL;
 117                 }
 118         }
 119
 120         if (io->in.timewarp) {
 121                 uint8_t data[8];
 122                 SBVAL(data, 0, io->in.timewarp);
 123                 status = smb2_create_blob_add(req, &blobs,
 124                                               SMB2_CREATE_TAG_TWRP, data_blob_const(data, 8));
 125                 if (!NT_STATUS_IS_OK(status)) {
 126                         talloc_free(req);
 127                         return NULL;
 128                 }
 129         }
 130
 131         if (io->in.sec_desc) {
 132                 enum ndr_err_code ndr_err;
 133                 DATA_BLOB sd_blob;
 134                 ndr_err = ndr_push_struct_blob(&sd_blob, req, NULL,
 135                                                io->in.sec_desc,
 136                                                (ndr_push_flags_fn_t)ndr_push_security_descriptor);
 137                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 138                         talloc_free(req);
 139                         return NULL;
 140                 }
 141                 status = smb2_create_blob_add(req, &blobs,
 142                                               SMB2_CREATE_TAG_SECD, sd_blob);
 143                 if (!NT_STATUS_IS_OK(status)) {
 144                         talloc_free(req);
 145                         return NULL;
 146                 }
 147         }
 148
 149         if (io->in.query_on_disk_id) {
 150                 status = smb2_create_blob_add(req, &blobs,
 151                                               SMB2_CREATE_TAG_QFID, data_blob(NULL, 0));
 152                 if (!NT_STATUS_IS_OK(status)) {
 153                         talloc_free(req);
 154                         return NULL;
 155                 }
 156         }
 157
 158         if (io->in.lease_request) {
 159                 uint8_t data[32];
 160
 161                 memcpy(&data[0], &io->in.lease_request->lease_key, 16);
 162                 SIVAL(data, 16, io->in.lease_request->lease_state);
 163                 SIVAL(data, 20, io->in.lease_request->lease_flags);
 164                 SBVAL(data, 24, io->in.lease_request->lease_duration);
 165
 166                 status = smb2_create_blob_add(req, &blobs,
 167                                               SMB2_CREATE_TAG_RQLS,
 168                                               data_blob_const(data, 32));
 169                 if (!NT_STATUS_IS_OK(status)) {
 170                         talloc_free(req);
 171                         return NULL;
 172                 }
 173         }
 174
 175         /* and any custom blobs */
 176         for (i=0;i<io->in.blobs.num_blobs;i++) {
 177                 status = smb2_create_blob_add(req, &blobs,
 178                                               io->in.blobs.blobs[i].tag,
 179                                               io->in.blobs.blobs[i].data);
 180                 if (!NT_STATUS_IS_OK(status)) {
 181                         talloc_free(req);
 182                         return NULL;
 183                 }
 184         }
 185
 186
 187         status = smb2_create_blob_push(req, &blob, blobs);
 188         if (!NT_STATUS_IS_OK(status)) {
 189                 talloc_free(req);
 190                 return NULL;
 191         }
 192
 193         status = smb2_push_o32s32_blob(&req->out, 0x30, blob);
 194         if (!NT_STATUS_IS_OK(status)) {
 195                 talloc_free(req);
 196                 return NULL;
 197         }
 198
 199         data_blob_free(&blob);
 200
 201         smb2_transport_send(req);
 202
 203         return req;
 204 }
 205
 206
 207 /*
 208   recv a create reply
 209 */
 210 NTSTATUS smb2_create_recv(struct smb2_request *req, TALLOC_CTX *mem_ctx, struct smb2_create *io)
 211 {
 212         NTSTATUS status;
 213         DATA_BLOB blob;
 214         int i;
 215
 216         if (!smb2_request_receive(req) ||
 217             !smb2_request_is_ok(req)) {
 218                 return smb2_request_destroy(req);
 219         }
 220
 221         SMB2_CHECK_PACKET_RECV(req, 0x58, true);
 222         ZERO_STRUCT(io->out);
 223         io->out.oplock_level   = CVAL(req->in.body, 0x02);
 224         io->out.reserved       = CVAL(req->in.body, 0x03);
 225         io->out.create_action  = IVAL(req->in.body, 0x04);
 226         io->out.create_time    = smbcli_pull_nttime(req->in.body, 0x08);
 227         io->out.access_time    = smbcli_pull_nttime(req->in.body, 0x10);
 228         io->out.write_time     = smbcli_pull_nttime(req->in.body, 0x18);
 229         io->out.change_time    = smbcli_pull_nttime(req->in.body, 0x20);
 230         io->out.alloc_size     = BVAL(req->in.body, 0x28);
 231         io->out.size           = BVAL(req->in.body, 0x30);
 232         io->out.file_attr      = IVAL(req->in.body, 0x38);
 233         io->out.reserved2      = IVAL(req->in.body, 0x3C);
 234         smb2_pull_handle(req->in.body+0x40, &io->out.file.handle);
 235         status = smb2_pull_o32s32_blob(&req->in, mem_ctx, req->in.body+0x50, &blob);
 236         if (!NT_STATUS_IS_OK(status)) {
 237                 smb2_request_destroy(req);
 238                 return status;
 239         }
 240
 241         status = smb2_create_blob_parse(mem_ctx, blob, &io->out.blobs);
 242         if (!NT_STATUS_IS_OK(status)) {
 243                 smb2_request_destroy(req);
 244                 return status;
 245         }
 246
 247         /* pull out the parsed blobs */
 248         for (i=0;i<io->out.blobs.num_blobs;i++) {
 249                 if (strcmp(io->out.blobs.blobs[i].tag, SMB2_CREATE_TAG_MXAC) == 0) {
 250                         /* TODO: this also contains a status field in
 251                            first 4 bytes */
 252                         if (io->out.blobs.blobs[i].data.length != 8) {
 253                                 smb2_request_destroy(req);
 254                                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 255                         }
 256                         io->out.maximal_access = IVAL(io->out.blobs.blobs[i].data.data, 4);
 257                 }
 258                 if (strcmp(io->out.blobs.blobs[i].tag, SMB2_CREATE_TAG_QFID) == 0) {
 259                         if (io->out.blobs.blobs[i].data.length != 32) {
 260                                 smb2_request_destroy(req);
 261                                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 262                         }
 263                         memcpy(io->out.on_disk_id, io->out.blobs.blobs[i].data.data, 32);
 264                 }
 265                 if (strcmp(io->out.blobs.blobs[i].tag, SMB2_CREATE_TAG_RQLS) == 0) {
 266                         uint8_t *data;
 267                         if (io->out.blobs.blobs[i].data.length != 32) {
 268                                 smb2_request_destroy(req);
 269                                 return NT_STATUS_INVALID_NETWORK_RESPONSE;
 270                         }
 271
 272                         data = io->out.blobs.blobs[i].data.data;
 273                         memcpy(&io->out.lease_response.lease_key, data, 16);
 274                         io->out.lease_response.lease_state = IVAL(data, 16);
 275                         io->out.lease_response.lease_flags = IVAL(data, 20);
 276                         io->out.lease_response.lease_duration = BVAL(data, 24);
 277                 }
 278         }
 279
 280         data_blob_free(&blob);
 281
 282         return smb2_request_destroy(req);
 283 }
 284
 285 /*
 286   sync create request
 287 */
 288 NTSTATUS smb2_create(struct smb2_tree *tree, TALLOC_CTX *mem_ctx, struct smb2_create *io)
 289 {
 290         struct smb2_request *req = smb2_create_send(tree, io);
 291         return smb2_create_recv(req, mem_ctx, io);
 292 }