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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/raw/raw_proto.h"
#include "libcli/smb2/smb2.h"
#include "libcli/smb2/smb2_calls.h"
/*
add a blob to a smb2_create attribute blob
*/
static NTSTATUS smb2_create_blob_push_one(TALLOC_CTX *mem_ctx, DATA_BLOB *buffer,
const struct smb2_create_blob *blob,
bool last)
{
uint32_t ofs = buffer->length;
size_t tag_length = strlen(blob->tag);
uint8_t pad = smb2_padding_size(blob->data.length+tag_length, 4);
if (!data_blob_realloc(mem_ctx, buffer,
buffer->length + 0x14 + tag_length + blob->data.length + pad))
return NT_STATUS_NO_MEMORY;
if (last) {
SIVAL(buffer->data, ofs+0x00, 0);
} else {
SIVAL(buffer->data, ofs+0x00, 0x14 + tag_length + blob->data.length + pad);
}
SSVAL(buffer->data, ofs+0x04, 0x10); /* offset of tag */
SIVAL(buffer->data, ofs+0x06, tag_length); /* tag length */
SSVAL(buffer->data, ofs+0x0A, 0x14 + tag_length); /* offset of data */
SIVAL(buffer->data, ofs+0x0C, blob->data.length);
memcpy(buffer->data+ofs+0x10, blob->tag, tag_length);
SIVAL(buffer->data, ofs+0x10+tag_length, 0); /* pad? */
memcpy(buffer->data+ofs+0x14+tag_length, blob->data.data, blob->data.length);
memset(buffer->data+ofs+0x14+tag_length+blob->data.length, 0, pad);
return NT_STATUS_OK;
}
NTSTATUS smb2_create_blob_add(TALLOC_CTX *mem_ctx, struct smb2_create_blobs *b,
const char *tag, DATA_BLOB data)
{
struct smb2_create_blob *array;
array = talloc_realloc(mem_ctx, b->blobs,
struct smb2_create_blob,
b->num_blobs + 1);
NT_STATUS_HAVE_NO_MEMORY(array);
b->blobs = array;
b->blobs[b->num_blobs].tag = talloc_strdup(b->blobs, tag);
NT_STATUS_HAVE_NO_MEMORY(b->blobs[b->num_blobs].tag);
if (data.data) {
b->blobs[b->num_blobs].data = data_blob_talloc(b->blobs,
data.data,
data.length);
NT_STATUS_HAVE_NO_MEMORY(b->blobs[b->num_blobs].data.data);
} else {
b->blobs[b->num_blobs].data = data_blob(NULL, 0);
}
b->num_blobs += 1;
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);
uint32_t i;
req = smb2_request_init_tree(tree, SMB2_OP_CREATE, 0x38, true, 0);
if (req == NULL) return NULL;
SCVAL(req->out.body, 0x02, io->in.security_flags);
SCVAL(req->out.body, 0x03, io->in.oplock_level);
SIVAL(req->out.body, 0x04, io->in.impersonation_level);
SBVAL(req->out.body, 0x08, io->in.create_flags);
SBVAL(req->out.body, 0x10, io->in.reserved);
SIVAL(req->out.body, 0x18, io->in.desired_access);
SIVAL(req->out.body, 0x1C, io->in.file_attributes);
SIVAL(req->out.body, 0x20, io->in.share_access);
SIVAL(req->out.body, 0x24, io->in.create_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, 4));
ea_put_list_chained(b.data, io->in.eas.num_eas, io->in.eas.eas, 4);
status = smb2_create_blob_add(req, &io->in.blobs,
SMB2_CREATE_TAG_EXTA, b);
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, &io->in.blobs,
SMB2_CREATE_TAG_MXAC, data_blob(NULL, 0));
if (!NT_STATUS_IS_OK(status)) {
talloc_free(req);
return NULL;
}
for (i=0; i < io->in.blobs.num_blobs; i++) {
bool last = false;
const struct smb2_create_blob *c;
if ((i + 1) == io->in.blobs.num_blobs) {
last = true;
}
c = &io->in.blobs.blobs[i];
status = smb2_create_blob_push_one(req, &blob,
c, last);
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_level = CVAL(req->in.body, 0x02);
io->out.reserved = CVAL(req->in.body, 0x03);
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.reserved2 = 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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