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samba-mirror/source3/smbd/smb2_create.c
2009-09-17 09:29:07 -07:00

743 lines
21 KiB
C

/*
Unix SMB/CIFS implementation.
Core SMB2 server
Copyright (C) Stefan Metzmacher 2009
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 "smbd/globals.h"
#include "../libcli/smb/smb_common.h"
static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
uint8_t in_oplock_level,
uint32_t in_impersonation_level,
uint32_t in_desired_access,
uint32_t in_file_attributes,
uint32_t in_share_access,
uint32_t in_create_disposition,
uint32_t in_create_options,
const char *in_name,
struct smb2_create_blobs in_context_blobs);
static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
uint8_t *out_oplock_level,
uint32_t *out_create_action,
NTTIME *out_creation_time,
NTTIME *out_last_access_time,
NTTIME *out_last_write_time,
NTTIME *out_change_time,
uint64_t *out_allocation_size,
uint64_t *out_end_of_file,
uint32_t *out_file_attributes,
uint64_t *out_file_id_volatile,
struct smb2_create_blobs *out_context_blobs);
static void smbd_smb2_request_create_done(struct tevent_req *subreq);
NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req)
{
const uint8_t *inbody;
int i = req->current_idx;
size_t expected_body_size = 0x39;
size_t body_size;
uint8_t in_oplock_level;
uint32_t in_impersonation_level;
uint32_t in_desired_access;
uint32_t in_file_attributes;
uint32_t in_share_access;
uint32_t in_create_disposition;
uint32_t in_create_options;
uint16_t in_name_offset;
uint16_t in_name_length;
DATA_BLOB in_name_buffer;
char *in_name_string;
size_t in_name_string_size;
uint32_t name_offset = 0;
uint32_t name_available_length = 0;
uint32_t in_context_offset;
uint32_t in_context_length;
DATA_BLOB in_context_buffer;
struct smb2_create_blobs in_context_blobs;
uint32_t context_offset = 0;
uint32_t context_available_length = 0;
uint32_t dyn_offset;
NTSTATUS status;
bool ok;
struct tevent_req *subreq;
if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
body_size = SVAL(inbody, 0x00);
if (body_size != expected_body_size) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
in_oplock_level = CVAL(inbody, 0x03);
in_impersonation_level = IVAL(inbody, 0x04);
in_desired_access = IVAL(inbody, 0x18);
in_file_attributes = IVAL(inbody, 0x1C);
in_share_access = IVAL(inbody, 0x20);
in_create_disposition = IVAL(inbody, 0x24);
in_create_options = IVAL(inbody, 0x28);
in_name_offset = SVAL(inbody, 0x2C);
in_name_length = SVAL(inbody, 0x2E);
in_context_offset = IVAL(inbody, 0x30);
in_context_length = IVAL(inbody, 0x34);
/*
* First check if the dynamic name and context buffers
* are correctly specified.
*
* Note: That we don't check if the name and context buffers
* overlap
*/
dyn_offset = SMB2_HDR_BODY + (body_size & 0xFFFFFFFE);
if (in_name_offset == 0 && in_name_length == 0) {
/* This is ok */
name_offset = 0;
} else if (in_name_offset < dyn_offset) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
} else {
name_offset = in_name_offset - dyn_offset;
}
if (name_offset > req->in.vector[i+2].iov_len) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
name_available_length = req->in.vector[i+2].iov_len - name_offset;
if (in_name_length > name_available_length) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
in_name_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base +
name_offset;
in_name_buffer.length = in_name_length;
if (in_context_offset == 0 && in_context_length == 0) {
/* This is ok */
context_offset = 0;
} else if (in_context_offset < dyn_offset) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
} else {
context_offset = in_context_offset - dyn_offset;
}
if (context_offset > req->in.vector[i+2].iov_len) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
context_available_length = req->in.vector[i+2].iov_len - context_offset;
if (in_context_length > context_available_length) {
return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
}
in_context_buffer.data = (uint8_t *)req->in.vector[i+2].iov_base +
context_offset;
in_context_buffer.length = in_context_length;
/*
* Now interpret the name and context buffers
*/
ok = convert_string_talloc(req, CH_UTF16, CH_UNIX,
in_name_buffer.data,
in_name_buffer.length,
&in_name_string,
&in_name_string_size, false);
if (!ok) {
return smbd_smb2_request_error(req, NT_STATUS_ILLEGAL_CHARACTER);
}
ZERO_STRUCT(in_context_blobs);
status = smb2_create_blob_parse(req, in_context_buffer, &in_context_blobs);
if (!NT_STATUS_IS_OK(status)) {
return smbd_smb2_request_error(req, status);
}
subreq = smbd_smb2_create_send(req,
req->sconn->smb2.event_ctx,
req,
in_oplock_level,
in_impersonation_level,
in_desired_access,
in_file_attributes,
in_share_access,
in_create_disposition,
in_create_options,
in_name_string,
in_context_blobs);
if (subreq == NULL) {
return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
}
tevent_req_set_callback(subreq, smbd_smb2_request_create_done, req);
return smbd_smb2_request_pending_queue(req, subreq);
}
static void smbd_smb2_request_create_done(struct tevent_req *subreq)
{
struct smbd_smb2_request *req = tevent_req_callback_data(subreq,
struct smbd_smb2_request);
int i = req->current_idx;
uint8_t *outhdr;
DATA_BLOB outbody;
DATA_BLOB outdyn;
uint8_t out_oplock_level = 0;
uint32_t out_create_action = 0;
NTTIME out_creation_time = 0;
NTTIME out_last_access_time = 0;
NTTIME out_last_write_time = 0;
NTTIME out_change_time = 0;
uint64_t out_allocation_size = 0;
uint64_t out_end_of_file = 0;
uint32_t out_file_attributes = 0;
uint64_t out_file_id_volatile = 0;
struct smb2_create_blobs out_context_blobs;
DATA_BLOB out_context_buffer;
uint16_t out_context_buffer_offset = 0;
NTSTATUS status;
NTSTATUS error; /* transport error */
status = smbd_smb2_create_recv(subreq,
req,
&out_oplock_level,
&out_create_action,
&out_creation_time,
&out_last_access_time,
&out_last_write_time,
&out_change_time,
&out_allocation_size,
&out_end_of_file,
&out_file_attributes,
&out_file_id_volatile,
&out_context_blobs);
TALLOC_FREE(subreq);
if (!NT_STATUS_IS_OK(status)) {
error = smbd_smb2_request_error(req, status);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(req->sconn,
nt_errstr(error));
return;
}
return;
}
status = smb2_create_blob_push(req, &out_context_buffer, out_context_blobs);
if (!NT_STATUS_IS_OK(status)) {
error = smbd_smb2_request_error(req, status);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(req->sconn,
nt_errstr(error));
return;
}
return;
}
if (out_context_buffer.length > 0) {
out_context_buffer_offset = SMB2_HDR_BODY + 0x58;
}
outhdr = (uint8_t *)req->out.vector[i].iov_base;
outbody = data_blob_talloc(req->out.vector, NULL, 0x58);
if (outbody.data == NULL) {
error = smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(req->sconn,
nt_errstr(error));
return;
}
return;
}
SSVAL(outbody.data, 0x00, 0x58 + 1); /* struct size */
SCVAL(outbody.data, 0x02,
out_oplock_level); /* oplock level */
SCVAL(outbody.data, 0x03, 0); /* reserved */
SIVAL(outbody.data, 0x04,
out_create_action); /* create action */
SBVAL(outbody.data, 0x08,
out_creation_time); /* creation time */
SBVAL(outbody.data, 0x10,
out_last_access_time); /* last access time */
SBVAL(outbody.data, 0x18,
out_last_write_time); /* last write time */
SBVAL(outbody.data, 0x20,
out_change_time); /* change time */
SBVAL(outbody.data, 0x28,
out_allocation_size); /* allocation size */
SBVAL(outbody.data, 0x30,
out_end_of_file); /* end of file */
SIVAL(outbody.data, 0x38,
out_file_attributes); /* file attributes */
SIVAL(outbody.data, 0x3C, 0); /* reserved */
SBVAL(outbody.data, 0x40, 0); /* file id (persistent) */
SBVAL(outbody.data, 0x48,
out_file_id_volatile); /* file id (volatile) */
SIVAL(outbody.data, 0x50,
out_context_buffer_offset); /* create contexts offset */
SIVAL(outbody.data, 0x54,
out_context_buffer.length); /* create contexts length */
outdyn = out_context_buffer;
error = smbd_smb2_request_done(req, outbody, &outdyn);
if (!NT_STATUS_IS_OK(error)) {
smbd_server_connection_terminate(req->sconn,
nt_errstr(error));
return;
}
}
struct smbd_smb2_create_state {
struct smbd_smb2_request *smb2req;
uint8_t out_oplock_level;
uint32_t out_create_action;
NTTIME out_creation_time;
NTTIME out_last_access_time;
NTTIME out_last_write_time;
NTTIME out_change_time;
uint64_t out_allocation_size;
uint64_t out_end_of_file;
uint32_t out_file_attributes;
uint64_t out_file_id_volatile;
struct smb2_create_blobs out_context_blobs;
};
static struct tevent_req *smbd_smb2_create_send(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct smbd_smb2_request *smb2req,
uint8_t in_oplock_level,
uint32_t in_impersonation_level,
uint32_t in_desired_access,
uint32_t in_file_attributes,
uint32_t in_share_access,
uint32_t in_create_disposition,
uint32_t in_create_options,
const char *in_name,
struct smb2_create_blobs in_context_blobs)
{
struct tevent_req *req;
struct smbd_smb2_create_state *state;
NTSTATUS status;
struct smb_request *smbreq;
files_struct *result;
int info;
SMB_STRUCT_STAT sbuf;
struct smb2_create_blobs out_context_blobs;
ZERO_STRUCT(out_context_blobs);
req = tevent_req_create(mem_ctx, &state,
struct smbd_smb2_create_state);
if (req == NULL) {
return NULL;
}
state->smb2req = smb2req;
DEBUG(10,("smbd_smb2_create: name[%s]\n",
in_name));
smbreq = smbd_smb2_fake_smb_request(smb2req);
if (tevent_req_nomem(smbreq, req)) {
return tevent_req_post(req, ev);
}
if (IS_IPC(smbreq->conn)) {
const char *pipe_name = in_name;
if (!lp_nt_pipe_support()) {
tevent_req_nterror(req, NT_STATUS_ACCESS_DENIED);
return tevent_req_post(req, ev);
}
/* Strip \\ off the name. */
if (pipe_name[0] == '\\') {
pipe_name++;
}
status = open_np_file(smbreq, pipe_name, &result);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
info = FILE_WAS_OPENED;
ZERO_STRUCT(sbuf);
} else if (CAN_PRINT(smbreq->conn)) {
status = file_new(smbreq, smbreq->conn, &result);
if(!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
status = print_fsp_open(smbreq,
smbreq->conn,
in_name,
smbreq->vuid,
result,
&sbuf);
if (!NT_STATUS_IS_OK(status)) {
file_free(smbreq, result);
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
info = FILE_WAS_CREATED;
} else {
char *fname;
struct smb_filename *smb_fname = NULL;
struct smb2_create_blob *exta = NULL;
struct ea_list *ea_list = NULL;
struct smb2_create_blob *mxac = NULL;
NTTIME max_access_time = 0;
struct smb2_create_blob *secd = NULL;
struct security_descriptor *sec_desc = NULL;
struct smb2_create_blob *dhnq = NULL;
struct smb2_create_blob *dhnc = NULL;
struct smb2_create_blob *alsi = NULL;
uint64_t allocation_size = 0;
struct smb2_create_blob *twrp = NULL;
struct smb2_create_blob *qfid = NULL;
exta = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_EXTA);
mxac = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_MXAC);
secd = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_SECD);
dhnq = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_DHNQ);
dhnc = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_DHNC);
alsi = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_ALSI);
twrp = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_TWRP);
qfid = smb2_create_blob_find(&in_context_blobs,
SMB2_CREATE_TAG_QFID);
fname = talloc_strdup(state, in_name);
if (tevent_req_nomem(fname, req)) {
return tevent_req_post(req, ev);
}
if (exta) {
if (dhnc) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
ea_list = read_nttrans_ea_list(mem_ctx,
(const char *)exta->data.data, exta->data.length);
if (!ea_list) {
DEBUG(10,("smbd_smb2_create_send: read_ea_name_list failed.\n"));
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
}
if (mxac) {
if (dhnc) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
if (mxac->data.length == 0) {
max_access_time = 0;
} else if (mxac->data.length == 8) {
max_access_time = BVAL(mxac->data.data, 0);
} else {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
}
if (secd) {
enum ndr_err_code ndr_err;
if (dhnc) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
sec_desc = talloc_zero(state, struct security_descriptor);
if (tevent_req_nomem(sec_desc, req)) {
return tevent_req_post(req, ev);
}
ndr_err = ndr_pull_struct_blob(&secd->data,
sec_desc, NULL, sec_desc,
(ndr_pull_flags_fn_t)ndr_pull_security_descriptor);
if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
DEBUG(2,("ndr_pull_security_descriptor failed: %s\n",
ndr_errstr(ndr_err)));
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
}
if (dhnq) {
if (dhnc) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
if (dhnq->data.length != 16) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
/*
* we don't support durable handles yet
* and have to ignore this
*/
}
if (dhnc) {
if (dhnc->data.length != 16) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
/* we don't support durable handles yet */
tevent_req_nterror(req, NT_STATUS_OBJECT_NAME_NOT_FOUND);
return tevent_req_post(req, ev);
}
if (alsi) {
if (dhnc) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
if (alsi->data.length != 8) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
allocation_size = BVAL(alsi->data.data, 0);
}
if (twrp) {
NTTIME nttime;
time_t t;
struct tm *tm;
if (dhnc) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
if (twrp->data.length != 8) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
nttime = BVAL(twrp->data.data, 0);
t = nt_time_to_unix(nttime);
tm = gmtime(&t);
TALLOC_FREE(fname);
fname = talloc_asprintf(state,
"@GMT-%04u.%02u.%02u-%02u.%02u.%02u\\%s",
tm->tm_year + 1900,
tm->tm_mon + 1,
tm->tm_mday,
tm->tm_hour,
tm->tm_min,
tm->tm_sec,
in_name);
if (tevent_req_nomem(fname, req)) {
return tevent_req_post(req, ev);
}
}
if (qfid) {
if (qfid->data.length != 0) {
tevent_req_nterror(req, NT_STATUS_INVALID_PARAMETER);
return tevent_req_post(req, ev);
}
}
/* these are ignored for SMB2 */
in_create_options &= ~(0x10);/* NTCREATEX_OPTIONS_SYNC_ALERT */
in_create_options &= ~(0x20);/* NTCREATEX_OPTIONS_ASYNC_ALERT */
/* convert '\\' into '/' */
status = check_path_syntax(fname);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
status = filename_convert(req,
smbreq->conn,
smbreq->flags2 & FLAGS2_DFS_PATHNAMES,
fname,
0,
NULL,
&smb_fname);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
status = SMB_VFS_CREATE_FILE(smbreq->conn,
smbreq,
0, /* root_dir_fid */
smb_fname,
in_desired_access,
in_share_access,
in_create_disposition,
in_create_options,
in_file_attributes,
0, /* oplock_request */
allocation_size,
sec_desc,
ea_list,
&result,
&info);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
if (mxac) {
NTTIME last_write_time;
unix_timespec_to_nt_time(&last_write_time,
result->fsp_name->st.st_ex_mtime);
if (last_write_time != max_access_time) {
uint8_t p[8];
uint32_t max_access_granted;
DATA_BLOB blob = data_blob_const(p, sizeof(p));
status = smbd_check_open_rights(smbreq->conn,
result->fsp_name,
SEC_FLAG_MAXIMUM_ALLOWED,
&max_access_granted);
SIVAL(p, 0, NT_STATUS_V(status));
SIVAL(p, 4, max_access_granted);
status = smb2_create_blob_add(state,
&out_context_blobs,
SMB2_CREATE_TAG_MXAC,
blob);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
}
}
if (qfid) {
uint8_t p[32];
DATA_BLOB blob = data_blob_const(p, sizeof(p));
ZERO_STRUCT(p);
/* TODO: maybe use result->file_id */
SIVAL(p, 0, result->fsp_name->st.st_ex_ino);/* FileIndexLow */
SIVAL(p, 4, result->fsp_name->st.st_ex_dev);/* FileIndexHigh */
status = smb2_create_blob_add(state, &out_context_blobs,
SMB2_CREATE_TAG_QFID,
blob);
if (!NT_STATUS_IS_OK(status)) {
tevent_req_nterror(req, status);
return tevent_req_post(req, ev);
}
}
sbuf = result->fsp_name->st;
}
smb2req->compat_chain_fsp = smbreq->chain_fsp;
state->out_oplock_level = 0;
if ((in_create_disposition == FILE_SUPERSEDE)
&& (info == FILE_WAS_OVERWRITTEN)) {
state->out_create_action = FILE_WAS_SUPERSEDED;
} else {
state->out_create_action = info;
}
unix_timespec_to_nt_time(&state->out_creation_time, sbuf.st_ex_btime);
unix_timespec_to_nt_time(&state->out_last_access_time, sbuf.st_ex_atime);
unix_timespec_to_nt_time(&state->out_last_write_time,sbuf.st_ex_mtime);
unix_timespec_to_nt_time(&state->out_change_time, sbuf.st_ex_ctime);
state->out_allocation_size = sbuf.st_ex_blksize * sbuf.st_ex_blocks;
state->out_end_of_file = sbuf.st_ex_size;
state->out_file_attributes = dos_mode(result->conn,
result->fsp_name);
if (state->out_file_attributes == 0) {
state->out_file_attributes = FILE_ATTRIBUTE_NORMAL;
}
state->out_file_id_volatile = result->fnum;
state->out_context_blobs = out_context_blobs;
tevent_req_done(req);
return tevent_req_post(req, ev);
}
static NTSTATUS smbd_smb2_create_recv(struct tevent_req *req,
TALLOC_CTX *mem_ctx,
uint8_t *out_oplock_level,
uint32_t *out_create_action,
NTTIME *out_creation_time,
NTTIME *out_last_access_time,
NTTIME *out_last_write_time,
NTTIME *out_change_time,
uint64_t *out_allocation_size,
uint64_t *out_end_of_file,
uint32_t *out_file_attributes,
uint64_t *out_file_id_volatile,
struct smb2_create_blobs *out_context_blobs)
{
NTSTATUS status;
struct smbd_smb2_create_state *state = tevent_req_data(req,
struct smbd_smb2_create_state);
if (tevent_req_is_nterror(req, &status)) {
tevent_req_received(req);
return status;
}
*out_oplock_level = state->out_oplock_level;
*out_create_action = state->out_create_action;
*out_creation_time = state->out_creation_time;
*out_last_access_time = state->out_last_access_time;
*out_last_write_time = state->out_last_write_time;
*out_change_time = state->out_change_time;
*out_allocation_size = state->out_allocation_size;
*out_end_of_file = state->out_end_of_file;
*out_file_attributes = state->out_file_attributes;
*out_file_id_volatile = state->out_file_id_volatile;
*out_context_blobs = state->out_context_blobs;
talloc_steal(mem_ctx, state->out_context_blobs.blobs);
tevent_req_received(req);
return NT_STATUS_OK;
}