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/*
Unix SMB/CIFS implementation.
SMB2 client tree handling
Copyright (C) Andrew Tridgell 2005
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "libcli/raw/libcliraw.h"
#include "libcli/smb2/smb2.h"
#include "libcli/smb2/smb2_calls.h"
#define CREATE_TAG_EXTA 0x41747845 /* "ExtA" */
#define CREATE_TAG_MXAC 0x6341784D /* "MxAc" */
/*
add a blob to a smb2_create attribute blob
*/
NTSTATUS smb2_create_blob_add(TALLOC_CTX *mem_ctx, DATA_BLOB *blob,
uint32_t tag,
DATA_BLOB add, bool last)
{
uint32_t ofs = blob->length;
uint8_t pad = smb2_padding_size(add.length, 8);
if (!data_blob_realloc(mem_ctx, blob, blob->length + 0x18 + add.length + pad))
return NT_STATUS_NO_MEMORY;
if (last) {
SIVAL(blob->data, ofs+0x00, 0);
} else {
SIVAL(blob->data, ofs+0x00, 0x18 + add.length + pad);
}
SSVAL(blob->data, ofs+0x04, 0x10); /* offset of tag */
SIVAL(blob->data, ofs+0x06, 0x04); /* tag length */
SSVAL(blob->data, ofs+0x0A, 0x18); /* offset of data */
SIVAL(blob->data, ofs+0x0C, add.length);
SIVAL(blob->data, ofs+0x10, tag);
SIVAL(blob->data, ofs+0x14, 0); /* pad? */
memcpy(blob->data+ofs+0x18, add.data, add.length);
memset(blob->data+ofs+0x18+add.length, 0, pad);
return NT_STATUS_OK;
}
/*
send a create request
*/
struct smb2_request *smb2_create_send(struct smb2_tree *tree, struct smb2_create *io)
{
struct smb2_request *req;
NTSTATUS status;
DATA_BLOB blob = data_blob(NULL, 0);
req = smb2_request_init_tree(tree, SMB2_OP_CREATE, 0x38, true, 0);
if (req == NULL) return NULL;
SSVAL(req->out.body, 0x02, io->in.oplock_flags);
SIVAL(req->out.body, 0x04, io->in.impersonation);
SIVAL(req->out.body, 0x08, io->in.unknown3[0]);
SIVAL(req->out.body, 0x0C, io->in.unknown3[1]);
SIVAL(req->out.body, 0x10, io->in.unknown3[2]);
SIVAL(req->out.body, 0x14, io->in.unknown3[3]);
SIVAL(req->out.body, 0x18, io->in.access_mask);
SIVAL(req->out.body, 0x1C, io->in.file_attr);
SIVAL(req->out.body, 0x20, io->in.share_access);
SIVAL(req->out.body, 0x24, io->in.open_disposition);
SIVAL(req->out.body, 0x28, io->in.create_options);
status = smb2_push_o16s16_string(&req->out, 0x2C, io->in.fname);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(req);
return NULL;
}
if (io->in.eas.num_eas != 0) {
DATA_BLOB b = data_blob_talloc(req, NULL,
ea_list_size_chained(io->in.eas.num_eas, io->in.eas.eas));
ea_put_list_chained(b.data, io->in.eas.num_eas, io->in.eas.eas);
status = smb2_create_blob_add(req, &blob, CREATE_TAG_EXTA, b, false);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(req);
return NULL;
}
data_blob_free(&b);
}
/* an empty MxAc tag seems to be used to ask the server to
return the maximum access mask allowed on the file */
status = smb2_create_blob_add(req, &blob, CREATE_TAG_MXAC, data_blob(NULL, 0), true);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(req);
return NULL;
}
status = smb2_push_o32s32_blob(&req->out, 0x30, blob);
if (!NT_STATUS_IS_OK(status)) {
talloc_free(req);
return NULL;
}
smb2_transport_send(req);
return req;
}
/*
recv a create reply
*/
NTSTATUS smb2_create_recv(struct smb2_request *req, TALLOC_CTX *mem_ctx, struct smb2_create *io)
{
NTSTATUS status;
if (!smb2_request_receive(req) ||
!smb2_request_is_ok(req)) {
return smb2_request_destroy(req);
}
SMB2_CHECK_PACKET_RECV(req, 0x58, true);
io->out.oplock_flags = SVAL(req->in.body, 0x02);
io->out.create_action = IVAL(req->in.body, 0x04);
io->out.create_time = smbcli_pull_nttime(req->in.body, 0x08);
io->out.access_time = smbcli_pull_nttime(req->in.body, 0x10);
io->out.write_time = smbcli_pull_nttime(req->in.body, 0x18);
io->out.change_time = smbcli_pull_nttime(req->in.body, 0x20);
io->out.alloc_size = BVAL(req->in.body, 0x28);
io->out.size = BVAL(req->in.body, 0x30);
io->out.file_attr = IVAL(req->in.body, 0x38);
io->out._pad = IVAL(req->in.body, 0x3C);
smb2_pull_handle(req->in.body+0x40, &io->out.file.handle);
status = smb2_pull_o32s32_blob(&req->in, mem_ctx, req->in.body+0x50, &io->out.blob);
if (!NT_STATUS_IS_OK(status)) {
smb2_request_destroy(req);
return status;
}
return smb2_request_destroy(req);
}
/*
sync create request
*/
NTSTATUS smb2_create(struct smb2_tree *tree, TALLOC_CTX *mem_ctx, struct smb2_create *io)
{
struct smb2_request *req = smb2_create_send(tree, io);
return smb2_create_recv(req, mem_ctx, io);
}
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