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/* Copyright (C) 2017 Open Information Security Foundation
*
* You can copy, redistribute or modify this Program under the terms of
* the GNU General Public License version 2 as published by the Free
* Software Foundation.
*
* 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
* version 2 along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
use std::ptr;
use crate::core::*;
use crate::smb::smb::*;
use crate::dcerpc::detect::{DCEIfaceData, DCEOpnumData, DETECT_DCE_OPNUM_RANGE_UNINITIALIZED};
use crate::dcerpc::dcerpc::DCERPC_TYPE_REQUEST;
use crate::detect::uint::detect_match_uint;
#[no_mangle]
pub unsafe extern "C" fn rs_smb_tx_get_share(tx: &mut SMBTransaction,
buffer: *mut *const u8,
buffer_len: *mut u32)
-> u8
{
if let Some(SMBTransactionTypeData::TREECONNECT(ref x)) = tx.type_data {
SCLogDebug!("is_pipe {}", x.is_pipe);
if !x.is_pipe {
*buffer = x.share_name.as_ptr();
*buffer_len = x.share_name.len() as u32;
return 1;
}
}
*buffer = ptr::null();
*buffer_len = 0;
return 0;
}
#[no_mangle]
pub unsafe extern "C" fn rs_smb_tx_get_named_pipe(tx: &mut SMBTransaction,
buffer: *mut *const u8,
buffer_len: *mut u32)
-> u8
{
if let Some(SMBTransactionTypeData::TREECONNECT(ref x)) = tx.type_data {
SCLogDebug!("is_pipe {}", x.is_pipe);
if x.is_pipe {
*buffer = x.share_name.as_ptr();
*buffer_len = x.share_name.len() as u32;
return 1;
}
}
*buffer = ptr::null();
*buffer_len = 0;
return 0;
}
#[no_mangle]
pub unsafe extern "C" fn rs_smb_tx_get_stub_data(tx: &mut SMBTransaction,
direction: u8,
buffer: *mut *const u8,
buffer_len: *mut u32)
-> u8
{
if let Some(SMBTransactionTypeData::DCERPC(ref x)) = tx.type_data {
let vref = if direction == Direction::ToServer as u8 {
&x.stub_data_ts
} else {
&x.stub_data_tc
};
if !vref.is_empty() {
*buffer = vref.as_ptr();
*buffer_len = vref.len() as u32;
return 1;
}
}
*buffer = ptr::null();
*buffer_len = 0;
return 0;
}
#[no_mangle]
pub extern "C" fn rs_smb_tx_match_dce_opnum(tx: &mut SMBTransaction,
dce_data: &mut DCEOpnumData)
-> u8
{
SCLogDebug!("rs_smb_tx_get_dce_opnum: start");
if let Some(SMBTransactionTypeData::DCERPC(ref x)) = tx.type_data {
if x.req_cmd == DCERPC_TYPE_REQUEST {
for range in dce_data.data.iter() {
if range.range2 == DETECT_DCE_OPNUM_RANGE_UNINITIALIZED {
if range.range1 == x.opnum as u32 {
return 1;
}
} else if range.range1 <= x.opnum as u32 && range.range2 >= x.opnum as u32 {
return 1;
}
}
}
}
return 0;
}
/* mimic logic that is/was in the C code:
* - match on REQUEST (so not on BIND/BINDACK (probably for mixing with
* dce_opnum and dce_stub_data)
* - only match on approved ifaces (so ack_result == 0) */
#[no_mangle]
pub extern "C" fn rs_smb_tx_get_dce_iface(state: &mut SMBState,
tx: &mut SMBTransaction,
dce_data: &mut DCEIfaceData)
-> u8
{
let if_uuid = dce_data.if_uuid.as_slice();
let is_dcerpc_request = match tx.type_data {
Some(SMBTransactionTypeData::DCERPC(ref x)) => {
x.req_cmd == DCERPC_TYPE_REQUEST
},
_ => { false },
};
if !is_dcerpc_request {
return 0;
}
let ifaces = match state.dcerpc_ifaces {
Some(ref x) => x,
_ => {
return 0;
},
};
SCLogDebug!("looking for UUID {:?}", if_uuid);
for i in ifaces {
SCLogDebug!("stored UUID {:?} acked {} ack_result {}", i, i.acked, i.ack_result);
if i.acked && i.ack_result == 0 && i.uuid == if_uuid {
if let Some(x) = &dce_data.du16 {
if detect_match_uint(x, i.ver) {
return 1;
}
} else {
return 1;
}
}
}
return 0;
}
#[no_mangle]
pub unsafe extern "C" fn rs_smb_tx_get_ntlmssp_user(tx: &mut SMBTransaction,
buffer: *mut *const u8,
buffer_len: *mut u32)
-> u8
{
if let Some(SMBTransactionTypeData::SESSIONSETUP(ref x)) = tx.type_data {
if let Some(ref ntlmssp) = x.ntlmssp {
*buffer = ntlmssp.user.as_ptr();
*buffer_len = ntlmssp.user.len() as u32;
return 1;
}
}
*buffer = ptr::null();
*buffer_len = 0;
return 0;
}
#[no_mangle]
pub unsafe extern "C" fn rs_smb_tx_get_ntlmssp_domain(tx: &mut SMBTransaction,
buffer: *mut *const u8,
buffer_len: *mut u32)
-> u8
{
if let Some(SMBTransactionTypeData::SESSIONSETUP(ref x)) = tx.type_data {
if let Some(ref ntlmssp) = x.ntlmssp {
*buffer = ntlmssp.domain.as_ptr();
*buffer_len = ntlmssp.domain.len() as u32;
return 1;
}
}
*buffer = ptr::null();
*buffer_len = 0;
return 0;
}
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