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samba-mirror/source3/libsmb/cliquota.c
Volker Lendecke 0c8174cf92 libsmb: Fix CID 1438243 Unchecked return value
Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Wed Aug  8 23:10:22 CEST 2018 on sn-devel-144
2018-08-08 23:10:22 +02:00

693 lines
16 KiB
C

/*
Unix SMB/CIFS implementation.
client quota functions
Copyright (C) Stefan (metze) Metzmacher 2003
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 "libsmb/libsmb.h"
#include "../librpc/gen_ndr/ndr_security.h"
#include "fake_file.h"
#include "../libcli/security/security.h"
#include "trans2.h"
#include "../libcli/smb/smbXcli_base.h"
#include "librpc/gen_ndr/ndr_quota.h"
NTSTATUS cli_get_quota_handle(struct cli_state *cli, uint16_t *quota_fnum)
{
return cli_ntcreate(cli, FAKE_FILE_NAME_QUOTA_WIN32,
0x00000016, DESIRED_ACCESS_PIPE,
0x00000000, FILE_SHARE_READ|FILE_SHARE_WRITE,
FILE_OPEN, 0x00000000, 0x03, quota_fnum, NULL);
}
void free_ntquota_list(SMB_NTQUOTA_LIST **qt_list)
{
if (!qt_list || !*qt_list) {
return;
}
if ((*qt_list)->mem_ctx)
talloc_destroy((*qt_list)->mem_ctx);
(*qt_list) = NULL;
return;
}
bool add_record_to_ntquota_list(TALLOC_CTX *mem_ctx,
SMB_NTQUOTA_STRUCT *pqt,
SMB_NTQUOTA_LIST **pqt_list)
{
SMB_NTQUOTA_LIST *tmp_list_ent;
if ((tmp_list_ent = talloc_zero(mem_ctx, SMB_NTQUOTA_LIST)) == NULL) {
return false;
}
if ((tmp_list_ent->quotas = talloc_zero(mem_ctx, SMB_NTQUOTA_STRUCT)) ==
NULL) {
return false;
}
*tmp_list_ent->quotas = *pqt;
tmp_list_ent->mem_ctx = mem_ctx;
DLIST_ADD((*pqt_list), tmp_list_ent);
return true;
}
bool parse_user_quota_record(const uint8_t *rdata,
unsigned int rdata_count,
unsigned int *offset,
SMB_NTQUOTA_STRUCT *pqt)
{
struct file_quota_information info = {0};
TALLOC_CTX *frame = talloc_stackframe();
DATA_BLOB blob;
enum ndr_err_code err;
bool result = false;
blob.data = discard_const_p(uint8_t, rdata);
blob.length = rdata_count;
err = ndr_pull_struct_blob(
&blob,
frame,
&info,
(ndr_pull_flags_fn_t)ndr_pull_file_quota_information);
if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
goto out;
}
*offset = info.next_entry_offset;
ZERO_STRUCTP(pqt);
pqt->usedspace = info.quota_used;
pqt->softlim = info.quota_threshold;
pqt->hardlim = info.quota_limit;
pqt->qtype = SMB_USER_QUOTA_TYPE;
pqt->sid = info.sid;
result = true;
out:
TALLOC_FREE(frame);
return result;
}
NTSTATUS parse_user_quota_list(const uint8_t *curdata,
uint32_t curdata_count,
TALLOC_CTX *mem_ctx,
SMB_NTQUOTA_LIST **pqt_list)
{
NTSTATUS status = NT_STATUS_OK;
unsigned offset;
SMB_NTQUOTA_STRUCT qt;
while (true) {
ZERO_STRUCT(qt);
if (!parse_user_quota_record(curdata, curdata_count, &offset,
&qt)) {
DEBUG(1, ("Failed to parse the quota record\n"));
status = NT_STATUS_INVALID_NETWORK_RESPONSE;
break;
}
if (offset > curdata_count) {
DEBUG(1, ("out of bounds offset in quota record\n"));
status = NT_STATUS_INVALID_NETWORK_RESPONSE;
break;
}
if (curdata + offset < curdata) {
DEBUG(1, ("Pointer overflow in quota record\n"));
status = NT_STATUS_INVALID_NETWORK_RESPONSE;
break;
}
if (!add_record_to_ntquota_list(mem_ctx, &qt, pqt_list)) {
status = NT_STATUS_NO_MEMORY;
break;
}
curdata += offset;
curdata_count -= offset;
if (offset == 0) {
break;
}
}
return status;
}
NTSTATUS parse_fs_quota_buffer(const uint8_t *rdata,
unsigned int rdata_count,
SMB_NTQUOTA_STRUCT *pqt)
{
SMB_NTQUOTA_STRUCT qt;
ZERO_STRUCT(qt);
if (rdata_count < 48) {
/* minimum length is not enforced by SMB2 client.
*/
DEBUG(1, ("small returned fs quota buffer\n"));
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
/* unknown_1 24 NULL bytes in pdata*/
/* the soft quotas 8 bytes (uint64_t)*/
qt.softlim = BVAL(rdata, 24);
/* the hard quotas 8 bytes (uint64_t)*/
qt.hardlim = BVAL(rdata, 32);
/* quota_flags 2 bytes **/
qt.qflags = SVAL(rdata, 40);
qt.qtype = SMB_USER_FS_QUOTA_TYPE;
*pqt = qt;
return NT_STATUS_OK;
}
NTSTATUS build_user_quota_buffer(SMB_NTQUOTA_LIST *qt_list,
uint32_t maxlen,
TALLOC_CTX *mem_ctx,
DATA_BLOB *outbuf,
SMB_NTQUOTA_LIST **end_ptr)
{
return fill_quota_buffer(mem_ctx,
qt_list,
false,
maxlen,
outbuf,
end_ptr);
}
NTSTATUS build_fs_quota_buffer(TALLOC_CTX *mem_ctx,
const SMB_NTQUOTA_STRUCT *pqt,
DATA_BLOB *blob,
uint32_t maxlen)
{
uint8_t *buf;
if (maxlen > 0 && maxlen < 48) {
return NT_STATUS_BUFFER_TOO_SMALL;
}
*blob = data_blob_talloc_zero(mem_ctx, 48);
if (!blob->data) {
return NT_STATUS_NO_MEMORY;
}
buf = blob->data;
/* Unknown1 24 NULL bytes*/
SBIG_UINT(buf, 0, (uint64_t)0);
SBIG_UINT(buf, 8, (uint64_t)0);
SBIG_UINT(buf, 16, (uint64_t)0);
/* Default Soft Quota 8 bytes */
SBIG_UINT(buf, 24, pqt->softlim);
/* Default Hard Quota 8 bytes */
SBIG_UINT(buf, 32, pqt->hardlim);
/* Quota flag 4 bytes */
SIVAL(buf, 40, pqt->qflags);
/* 4 padding bytes */
SIVAL(buf, 44, 0);
return NT_STATUS_OK;
}
NTSTATUS cli_get_user_quota(struct cli_state *cli, int quota_fnum,
SMB_NTQUOTA_STRUCT *pqt)
{
uint16_t setup[1];
uint8_t *rparam = NULL, *rdata = NULL;
uint32_t rparam_count, rdata_count;
unsigned int sid_len;
unsigned int offset;
struct nttrans_query_quota_params get_quota = {0};
struct file_get_quota_info info = {0};
enum ndr_err_code err;
NTSTATUS status;
TALLOC_CTX *frame = talloc_stackframe();
DATA_BLOB data_blob = data_blob_null;
DATA_BLOB param_blob = data_blob_null;
if (!cli||!pqt) {
smb_panic("cli_get_user_quota() called with NULL Pointer!");
}
if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
TALLOC_FREE(frame);
return cli_smb2_get_user_quota(cli, quota_fnum, pqt);
}
get_quota.fid = quota_fnum;
get_quota.return_single_entry = 1;
get_quota.restart_scan = 0;
sid_len = ndr_size_dom_sid(&pqt->sid, 0);
info.next_entry_offset = 0;
info.sid_length = sid_len;
info.sid = pqt->sid;
err = ndr_push_struct_blob(
&data_blob,
frame,
&info,
(ndr_push_flags_fn_t)ndr_push_file_get_quota_info);
if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
status = NT_STATUS_INTERNAL_ERROR;
goto out;
}
get_quota.sid_list_length = data_blob.length;
get_quota.start_sid_offset = data_blob.length;
err = ndr_push_struct_blob(
&param_blob,
frame,
&get_quota,
(ndr_push_flags_fn_t)ndr_push_nttrans_query_quota_params);
if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
status = NT_STATUS_INTERNAL_ERROR;
goto out;
}
status = cli_trans(talloc_tos(), cli, SMBnttrans,
NULL, -1, /* name, fid */
NT_TRANSACT_GET_USER_QUOTA, 0,
setup, 1, 0, /* setup */
param_blob.data, param_blob.length, 4, /* params */
data_blob.data, data_blob.length, 112, /* data */
NULL, /* recv_flags2 */
NULL, 0, NULL, /* rsetup */
&rparam, 4, &rparam_count,
&rdata, 8, &rdata_count);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("NT_TRANSACT_GET_USER_QUOTA failed: %s\n",
nt_errstr(status)));
goto out;
}
if (!parse_user_quota_record(rdata, rdata_count, &offset, pqt)) {
status = NT_STATUS_INVALID_NETWORK_RESPONSE;
DEBUG(0,("Got INVALID NT_TRANSACT_GET_USER_QUOTA reply.\n"));
}
out:
TALLOC_FREE(rparam);
TALLOC_FREE(rdata);
TALLOC_FREE(frame);
return status;
}
NTSTATUS
cli_set_user_quota(struct cli_state *cli, int quota_fnum, SMB_NTQUOTA_LIST *qtl)
{
uint16_t setup[1];
uint8_t params[2];
DATA_BLOB data = data_blob_null;
NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
if (!cli || !qtl) {
smb_panic("cli_set_user_quota() called with NULL Pointer!");
}
if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
return cli_smb2_set_user_quota(cli, quota_fnum, qtl);
}
status = build_user_quota_buffer(qtl, 0, talloc_tos(), &data, NULL);
if (!NT_STATUS_IS_OK(status)) {
/*
* smb1 doesn't send NT_STATUS_NO_MORE_ENTRIES so swallow
* this status.
*/
if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MORE_ENTRIES)) {
status = NT_STATUS_OK;
} else {
goto cleanup;
}
}
SSVAL(setup + 0, 0, NT_TRANSACT_SET_USER_QUOTA);
SSVAL(params,0,quota_fnum);
status = cli_trans(talloc_tos(), cli, SMBnttrans,
NULL, -1, /* name, fid */
NT_TRANSACT_SET_USER_QUOTA, 0,
setup, 1, 0, /* setup */
params, 2, 0, /* params */
data.data, data.length, 0, /* data */
NULL, /* recv_flags2 */
NULL, 0, NULL, /* rsetup */
NULL, 0, NULL, /* rparams */
NULL, 0, NULL); /* rdata */
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("NT_TRANSACT_SET_USER_QUOTA failed: %s\n",
nt_errstr(status)));
}
cleanup:
data_blob_free(&data);
return status;
}
static NTSTATUS cli_list_user_quota_step(struct cli_state *cli,
TALLOC_CTX *mem_ctx,
int quota_fnum,
SMB_NTQUOTA_LIST **pqt_list,
bool first)
{
uint16_t setup[1];
DATA_BLOB params_blob = data_blob_null;
uint8_t *rparam=NULL, *rdata=NULL;
uint32_t rparam_count=0, rdata_count=0;
NTSTATUS status;
struct nttrans_query_quota_params quota_params = {0};
enum ndr_err_code err;
TALLOC_CTX *frame = NULL;
if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
return cli_smb2_list_user_quota_step(cli, mem_ctx, quota_fnum,
pqt_list, first);
}
frame = talloc_stackframe();
SSVAL(setup + 0, 0, NT_TRANSACT_GET_USER_QUOTA);
quota_params.fid = quota_fnum;
if (first) {
quota_params.restart_scan = 1;
}
err = ndr_push_struct_blob(
&params_blob,
frame,
&quota_params,
(ndr_push_flags_fn_t)ndr_push_nttrans_query_quota_params);
if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
status = NT_STATUS_INVALID_PARAMETER;
goto cleanup;
}
status = cli_trans(talloc_tos(), cli, SMBnttrans,
NULL, -1, /* name, fid */
NT_TRANSACT_GET_USER_QUOTA, 0,
setup, 1, 0, /* setup */
params_blob.data, params_blob.length, 4, /* params */
NULL, 0, 2048, /* data */
NULL, /* recv_flags2 */
NULL, 0, NULL, /* rsetup */
&rparam, 0, &rparam_count,
&rdata, 0, &rdata_count);
/* compat. with smbd + safeguard against
* endless loop
*/
if (NT_STATUS_IS_OK(status) && rdata_count == 0) {
status = NT_STATUS_NO_MORE_ENTRIES;
}
if (!NT_STATUS_IS_OK(status)) {
goto cleanup;
}
status = parse_user_quota_list(rdata, rdata_count, mem_ctx, pqt_list);
cleanup:
TALLOC_FREE(rparam);
TALLOC_FREE(rdata);
TALLOC_FREE(frame);
return status;
}
NTSTATUS cli_list_user_quota(struct cli_state *cli,
int quota_fnum,
SMB_NTQUOTA_LIST **pqt_list)
{
NTSTATUS status;
TALLOC_CTX *mem_ctx = NULL;
bool first = true;
if (!cli || !pqt_list) {
smb_panic("cli_list_user_quota() called with NULL Pointer!");
}
*pqt_list = NULL;
if ((mem_ctx = talloc_init("SMB_USER_QUOTA_LIST")) == NULL) {
return NT_STATUS_NO_MEMORY;
}
do {
status = cli_list_user_quota_step(cli, mem_ctx, quota_fnum,
pqt_list, first);
first = false;
} while (NT_STATUS_IS_OK(status));
if (NT_STATUS_EQUAL(status, NT_STATUS_NO_MORE_ENTRIES)) {
status = NT_STATUS_OK;
}
if (!NT_STATUS_IS_OK(status) || *pqt_list == NULL) {
TALLOC_FREE(mem_ctx);
}
return status;
}
NTSTATUS cli_get_fs_quota_info(struct cli_state *cli, int quota_fnum,
SMB_NTQUOTA_STRUCT *pqt)
{
uint16_t setup[1];
uint8_t param[2];
uint8_t *rdata=NULL;
uint32_t rdata_count=0;
NTSTATUS status;
if (!cli||!pqt) {
smb_panic("cli_get_fs_quota_info() called with NULL Pointer!");
}
if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
return cli_smb2_get_fs_quota_info(cli, quota_fnum, pqt);
}
SSVAL(setup + 0, 0, TRANSACT2_QFSINFO);
SSVAL(param,0,SMB_FS_QUOTA_INFORMATION);
status = cli_trans(talloc_tos(), cli, SMBtrans2,
NULL, -1, /* name, fid */
0, 0, /* function, flags */
setup, 1, 0, /* setup */
param, 2, 0, /* param */
NULL, 0, 560, /* data */
NULL, /* recv_flags2 */
NULL, 0, NULL, /* rsetup */
NULL, 0, NULL, /* rparam */
&rdata, 48, &rdata_count);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("SMB_FS_QUOTA_INFORMATION failed: %s\n",
nt_errstr(status)));
return status;
}
status = parse_fs_quota_buffer(rdata, rdata_count, pqt);
TALLOC_FREE(rdata);
return status;
}
NTSTATUS cli_set_fs_quota_info(struct cli_state *cli, int quota_fnum,
SMB_NTQUOTA_STRUCT *pqt)
{
uint16_t setup[1];
uint8_t param[4];
DATA_BLOB data = data_blob_null;
NTSTATUS status;
if (!cli||!pqt) {
smb_panic("cli_set_fs_quota_info() called with NULL Pointer!");
}
if (smbXcli_conn_protocol(cli->conn) >= PROTOCOL_SMB2_02) {
return cli_smb2_set_fs_quota_info(cli, quota_fnum, pqt);
}
status = build_fs_quota_buffer(talloc_tos(), pqt, &data, 0);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
SSVAL(setup + 0, 0,TRANSACT2_SETFSINFO);
SSVAL(param,0,quota_fnum);
SSVAL(param,2,SMB_FS_QUOTA_INFORMATION);
status = cli_trans(talloc_tos(), cli, SMBtrans2,
NULL, -1, /* name, fid */
0, 0, /* function, flags */
setup, 1, 0, /* setup */
param, 4, 0, /* param */
data.data, data.length, 0, /* data */
NULL, /* recv_flags2 */
NULL, 0, NULL, /* rsetup */
NULL, 0, NULL, /* rparam */
NULL, 0, NULL); /* rdata */
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("SMB_FS_QUOTA_INFORMATION failed: %s\n",
nt_errstr(status)));
}
return status;
}
NTSTATUS fill_quota_buffer(TALLOC_CTX *mem_ctx,
SMB_NTQUOTA_LIST *qlist,
bool return_single,
uint32_t max_data,
DATA_BLOB *blob,
SMB_NTQUOTA_LIST **end_ptr)
{
int ndr_flags = NDR_SCALARS | NDR_BUFFERS;
struct ndr_push *qndr = ndr_push_init_ctx(mem_ctx);
uint32_t start_offset = 0;
uint32_t padding = 0;
if (qlist == NULL) {
/* We must push at least one. */
return NT_STATUS_NO_MORE_ENTRIES;
}
for (;qlist != NULL; qlist = qlist->next) {
struct file_quota_information info = {0};
enum ndr_err_code err;
uint32_t dsize = sizeof(info.next_entry_offset)
+ sizeof(info.sid_length)
+ sizeof(info.change_time)
+ sizeof(info.quota_used)
+ sizeof(info.quota_threshold)
+ sizeof(info.quota_limit);
info.sid_length = ndr_size_dom_sid(&qlist->quotas->sid, 0);
if (max_data) {
uint32_t curr_pos_no_padding = qndr->offset - padding;
uint32_t payload = dsize + info.sid_length;
uint32_t new_pos = (curr_pos_no_padding + payload);
if (new_pos < curr_pos_no_padding) {
/* Detect unlikely integer wrap */
DBG_ERR("Integer wrap while adjusting pos "
"0x%x by offset 0x%x\n",
curr_pos_no_padding, payload);
return NT_STATUS_INTERNAL_ERROR;
}
if (new_pos > max_data) {
DBG_WARNING("Max data will be exceeded "
"writing next query info. "
"cur_pos 0x%x, sid_length 0x%x, "
"dsize 0x%x, max_data 0x%x\n",
curr_pos_no_padding,
info.sid_length,
dsize,
max_data);
break;
}
}
start_offset = qndr->offset;
info.sid = qlist->quotas->sid;
info.quota_used = qlist->quotas->usedspace;
info.quota_threshold = qlist->quotas->softlim;
info.quota_limit = qlist->quotas->hardlim;
err = ndr_push_file_quota_information(qndr,
ndr_flags,
&info);
if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
DBG_DEBUG("Failed to push the quota sid\n");
return NT_STATUS_INTERNAL_ERROR;
}
/* pidl will align to 8 bytes due to 8 byte members*/
/* Remember how much align padding we've used. */
padding = qndr->offset;
err = ndr_push_align(qndr, 8);
if (!NDR_ERR_CODE_IS_SUCCESS(err)) {
DBG_DEBUG("ndr_push_align returned %s\n",
ndr_map_error2string(err));
return ndr_map_error2ntstatus(err);
}
padding = qndr->offset - padding;
/*
* Overwrite next_entry_offset for this entry now
* we know what it should be. We know we're using
* LIBNDR_FLAG_LITTLE_ENDIAN here so we can use
* SIVAL.
*/
info.next_entry_offset = qndr->offset - start_offset;
SIVAL(qndr->data, start_offset, info.next_entry_offset);
if (return_single) {
break;
}
}
if (end_ptr != NULL) {
*end_ptr = qlist;
}
/* Remove the padding alignment on the last element pushed. */
blob->length = qndr->offset - padding;
blob->data = qndr->data;
/*
* Terminate the pushed array by setting next_entry_offset
* for the last element to zero.
*/
if (blob->length >= sizeof(uint32_t)) {
SIVAL(qndr->data, start_offset, 0);
}
return NT_STATUS_OK;
}