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75d7c9d6 VJ |
1 | /* Copyright (C) 2017 Open Information Security Foundation |
2 | * | |
3 | * You can copy, redistribute or modify this Program under the terms of | |
4 | * the GNU General Public License version 2 as published by the Free | |
5 | * Software Foundation. | |
6 | * | |
7 | * This program is distributed in the hope that it will be useful, | |
8 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
9 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
10 | * GNU General Public License for more details. | |
11 | * | |
12 | * You should have received a copy of the GNU General Public License | |
13 | * version 2 along with this program; if not, write to the Free Software | |
14 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA | |
15 | * 02110-1301, USA. | |
16 | */ | |
17 | ||
13b73997 PC |
18 | use nom; |
19 | ||
42e5065a | 20 | use crate::core::*; |
75d7c9d6 | 21 | |
42e5065a JI |
22 | use crate::smb::smb::*; |
23 | use crate::smb::smb2_records::*; | |
24 | use crate::smb::smb2_session::*; | |
25 | use crate::smb::smb2_ioctl::*; | |
26 | use crate::smb::dcerpc::*; | |
27 | use crate::smb::events::*; | |
28 | use crate::smb::files::*; | |
75d7c9d6 VJ |
29 | |
30 | pub const SMB2_COMMAND_NEGOTIATE_PROTOCOL: u16 = 0; | |
31 | pub const SMB2_COMMAND_SESSION_SETUP: u16 = 1; | |
32 | pub const SMB2_COMMAND_SESSION_LOGOFF: u16 = 2; | |
33 | pub const SMB2_COMMAND_TREE_CONNECT: u16 = 3; | |
34 | pub const SMB2_COMMAND_TREE_DISCONNECT: u16 = 4; | |
35 | pub const SMB2_COMMAND_CREATE: u16 = 5; | |
36 | pub const SMB2_COMMAND_CLOSE: u16 = 6; | |
894a73ee | 37 | pub const SMB2_COMMAND_FLUSH: u16 = 7; |
75d7c9d6 VJ |
38 | pub const SMB2_COMMAND_READ: u16 = 8; |
39 | pub const SMB2_COMMAND_WRITE: u16 = 9; | |
894a73ee | 40 | pub const SMB2_COMMAND_LOCK: u16 = 10; |
75d7c9d6 | 41 | pub const SMB2_COMMAND_IOCTL: u16 = 11; |
894a73ee | 42 | pub const SMB2_COMMAND_CANCEL: u16 = 12; |
75d7c9d6 VJ |
43 | pub const SMB2_COMMAND_KEEPALIVE: u16 = 13; |
44 | pub const SMB2_COMMAND_FIND: u16 = 14; | |
894a73ee | 45 | pub const SMB2_COMMAND_CHANGE_NOTIFY: u16 = 15; |
75d7c9d6 VJ |
46 | pub const SMB2_COMMAND_GET_INFO: u16 = 16; |
47 | pub const SMB2_COMMAND_SET_INFO: u16 = 17; | |
894a73ee | 48 | pub const SMB2_COMMAND_OPLOCK_BREAK: u16 = 18; |
75d7c9d6 VJ |
49 | |
50 | pub fn smb2_command_string(c: u16) -> String { | |
51 | match c { | |
52 | SMB2_COMMAND_NEGOTIATE_PROTOCOL => "SMB2_COMMAND_NEGOTIATE_PROTOCOL", | |
53 | SMB2_COMMAND_SESSION_SETUP => "SMB2_COMMAND_SESSION_SETUP", | |
54 | SMB2_COMMAND_SESSION_LOGOFF => "SMB2_COMMAND_SESSION_LOGOFF", | |
55 | SMB2_COMMAND_TREE_CONNECT => "SMB2_COMMAND_TREE_CONNECT", | |
56 | SMB2_COMMAND_TREE_DISCONNECT => "SMB2_COMMAND_TREE_DISCONNECT", | |
57 | SMB2_COMMAND_CREATE => "SMB2_COMMAND_CREATE", | |
58 | SMB2_COMMAND_CLOSE => "SMB2_COMMAND_CLOSE", | |
59 | SMB2_COMMAND_READ => "SMB2_COMMAND_READ", | |
894a73ee | 60 | SMB2_COMMAND_FLUSH => "SMB2_COMMAND_FLUSH", |
75d7c9d6 | 61 | SMB2_COMMAND_WRITE => "SMB2_COMMAND_WRITE", |
894a73ee | 62 | SMB2_COMMAND_LOCK => "SMB2_COMMAND_LOCK", |
75d7c9d6 | 63 | SMB2_COMMAND_IOCTL => "SMB2_COMMAND_IOCTL", |
894a73ee | 64 | SMB2_COMMAND_CANCEL => "SMB2_COMMAND_CANCEL", |
75d7c9d6 VJ |
65 | SMB2_COMMAND_KEEPALIVE => "SMB2_COMMAND_KEEPALIVE", |
66 | SMB2_COMMAND_FIND => "SMB2_COMMAND_FIND", | |
894a73ee | 67 | SMB2_COMMAND_CHANGE_NOTIFY => "SMB2_COMMAND_CHANGE_NOTIFY", |
75d7c9d6 VJ |
68 | SMB2_COMMAND_GET_INFO => "SMB2_COMMAND_GET_INFO", |
69 | SMB2_COMMAND_SET_INFO => "SMB2_COMMAND_SET_INFO", | |
894a73ee | 70 | SMB2_COMMAND_OPLOCK_BREAK => "SMB2_COMMAND_OPLOCK_BREAK", |
75d7c9d6 VJ |
71 | _ => { return (c).to_string(); }, |
72 | }.to_string() | |
73 | ||
74 | } | |
75 | ||
76 | pub fn smb2_dialect_string(d: u16) -> String { | |
77 | match d { | |
78 | 0x0202 => "2.02", | |
79 | 0x0210 => "2.10", | |
80 | 0x0222 => "2.22", | |
81 | 0x0224 => "2.24", | |
82 | 0x02ff => "2.??", | |
83 | 0x0300 => "3.00", | |
84 | 0x0302 => "3.02", | |
85 | 0x0310 => "3.10", | |
86 | 0x0311 => "3.11", | |
87 | _ => { return (d).to_string(); }, | |
88 | }.to_string() | |
89 | } | |
90 | ||
91 | // later we'll use this to determine if we need to | |
92 | // track a ssn per type | |
32b19fac VJ |
93 | fn smb2_create_new_tx(cmd: u16) -> bool { |
94 | match cmd { | |
95 | SMB2_COMMAND_READ | | |
96 | SMB2_COMMAND_WRITE | | |
97 | SMB2_COMMAND_GET_INFO | | |
98 | SMB2_COMMAND_SET_INFO => { false }, | |
99 | _ => { true }, | |
100 | } | |
75d7c9d6 VJ |
101 | } |
102 | ||
103 | fn smb2_read_response_record_generic<'b>(state: &mut SMBState, r: &Smb2Record<'b>) | |
104 | { | |
105 | if smb2_create_new_tx(r.command) { | |
106 | let tx_hdr = SMBCommonHdr::from2(r, SMBHDR_TYPE_GENERICTX); | |
107 | let tx = state.get_generic_tx(2, r.command as u16, &tx_hdr); | |
108 | if let Some(tx) = tx { | |
109 | tx.set_status(r.nt_status, false); | |
110 | tx.response_done = true; | |
111 | } | |
112 | } | |
113 | } | |
114 | ||
115 | pub fn smb2_read_response_record<'b>(state: &mut SMBState, r: &Smb2Record<'b>) | |
116 | { | |
117 | smb2_read_response_record_generic(state, r); | |
118 | ||
75d7c9d6 | 119 | match parse_smb2_response_read(r.data) { |
13b73997 | 120 | Ok((_, rd)) => { |
ac4e8885 VJ |
121 | if r.nt_status == SMB_NTSTATUS_BUFFER_OVERFLOW { |
122 | SCLogDebug!("SMBv2/READ: incomplete record, expecting a follow up"); | |
123 | // fall through | |
124 | ||
125 | } else if r.nt_status != SMB_NTSTATUS_SUCCESS { | |
9dd7c381 VJ |
126 | SCLogDebug!("SMBv2: read response error code received: skip record"); |
127 | state.set_skip(STREAM_TOCLIENT, rd.len, rd.data.len() as u32); | |
128 | return; | |
129 | } | |
130 | ||
75d7c9d6 VJ |
131 | SCLogDebug!("SMBv2: read response => {:?}", rd); |
132 | ||
133 | // get the request info. If we don't have it, there is nothing | |
134 | // we can do except skip this record. | |
135 | let guid_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_OFFSET); | |
136 | let (offset, file_guid) = match state.ssn2vecoffset_map.remove(&guid_key) { | |
137 | Some(o) => (o.offset, o.guid), | |
138 | None => { | |
aa8d64c2 VJ |
139 | SCLogDebug!("SMBv2 READ response: reply to unknown request {:?}",rd); |
140 | state.set_skip(STREAM_TOCLIENT, rd.len, rd.data.len() as u32); | |
75d7c9d6 VJ |
141 | return; |
142 | }, | |
143 | }; | |
144 | SCLogDebug!("SMBv2 READ: GUID {:?} offset {}", file_guid, offset); | |
145 | ||
caa79468 | 146 | let mut set_event_fileoverlap = false; |
75d7c9d6 | 147 | // look up existing tracker and if we have it update it |
fb986abe | 148 | let found = match state.get_file_tx_by_fuid(&file_guid, STREAM_TOCLIENT) { |
75d7c9d6 VJ |
149 | Some((tx, files, flags)) => { |
150 | if let Some(SMBTransactionTypeData::FILE(ref mut tdf)) = tx.type_data { | |
151 | let file_id : u32 = tx.id as u32; | |
caa79468 PA |
152 | if offset < tdf.file_tracker.tracked { |
153 | set_event_fileoverlap = true; | |
154 | } | |
75d7c9d6 VJ |
155 | filetracker_newchunk(&mut tdf.file_tracker, files, flags, |
156 | &tdf.file_name, rd.data, offset, | |
157 | rd.len, 0, false, &file_id); | |
158 | } | |
159 | true | |
160 | }, | |
161 | None => { false }, | |
162 | }; | |
ac4e8885 | 163 | SCLogDebug!("existing file tx? {}", found); |
75d7c9d6 VJ |
164 | if !found { |
165 | let tree_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_SHARE); | |
ac4e8885 | 166 | let (share_name, mut is_pipe) = match state.ssn2tree_map.get(&tree_key) { |
75d7c9d6 VJ |
167 | Some(n) => (n.name.to_vec(), n.is_pipe), |
168 | _ => { (Vec::new(), false) }, | |
169 | }; | |
4d044483 VJ |
170 | let mut is_dcerpc = if is_pipe || (share_name.len() == 0 && !is_pipe) { |
171 | match state.get_service_for_guid(&file_guid) { | |
172 | (_, x) => x, | |
173 | } | |
174 | } else { | |
175 | false | |
75d7c9d6 | 176 | }; |
4d044483 VJ |
177 | SCLogDebug!("SMBv2/READ: share_name {:?} is_pipe {} is_dcerpc {}", |
178 | share_name, is_pipe, is_dcerpc); | |
ac4e8885 VJ |
179 | |
180 | if share_name.len() == 0 && !is_pipe { | |
181 | SCLogDebug!("SMBv2/READ: no tree connect seen, we don't know if we are a pipe"); | |
182 | ||
4d044483 VJ |
183 | if smb_dcerpc_probe(rd.data) == true { |
184 | SCLogDebug!("SMBv2/READ: looks like dcerpc"); | |
185 | // insert fake tree to assist in follow up lookups | |
186 | let tree = SMBTree::new(b"suricata::dcerpc".to_vec(), true); | |
187 | state.ssn2tree_map.insert(tree_key, tree); | |
188 | if !is_dcerpc { | |
189 | state.guid2name_map.insert(file_guid.to_vec(), b"suricata::dcerpc".to_vec()); | |
190 | } | |
191 | is_pipe = true; | |
192 | is_dcerpc = true; | |
193 | } else { | |
194 | SCLogDebug!("SMBv2/READ: not DCERPC"); | |
ac4e8885 VJ |
195 | } |
196 | } | |
197 | ||
75d7c9d6 VJ |
198 | if is_pipe && is_dcerpc { |
199 | SCLogDebug!("SMBv2 DCERPC read"); | |
200 | let hdr = SMBCommonHdr::from2(r, SMBHDR_TYPE_HEADER); | |
ac4e8885 | 201 | let vercmd = SMBVerCmdStat::new2_with_ntstatus(SMB2_COMMAND_READ, r.nt_status); |
75d7c9d6 VJ |
202 | smb_read_dcerpc_record(state, vercmd, hdr, &file_guid, rd.data); |
203 | } else if is_pipe { | |
204 | SCLogDebug!("non-DCERPC pipe"); | |
aa8d64c2 | 205 | state.set_skip(STREAM_TOCLIENT, rd.len, rd.data.len() as u32); |
75d7c9d6 VJ |
206 | } else { |
207 | let file_name = match state.guid2name_map.get(&file_guid) { | |
208 | Some(n) => { n.to_vec() }, | |
15978d4e | 209 | None => { b"<unknown>".to_vec() }, |
75d7c9d6 VJ |
210 | }; |
211 | let (tx, files, flags) = state.new_file_tx(&file_guid, &file_name, STREAM_TOCLIENT); | |
212 | if let Some(SMBTransactionTypeData::FILE(ref mut tdf)) = tx.type_data { | |
213 | let file_id : u32 = tx.id as u32; | |
caa79468 PA |
214 | if offset < tdf.file_tracker.tracked { |
215 | set_event_fileoverlap = true; | |
216 | } | |
75d7c9d6 VJ |
217 | filetracker_newchunk(&mut tdf.file_tracker, files, flags, |
218 | &file_name, rd.data, offset, | |
219 | rd.len, 0, false, &file_id); | |
220 | tdf.share_name = share_name; | |
221 | } | |
222 | tx.vercmd.set_smb2_cmd(SMB2_COMMAND_READ); | |
223 | tx.hdr = SMBCommonHdr::new(SMBHDR_TYPE_HEADER, | |
224 | r.session_id, r.tree_id, 0); // TODO move into new_file_tx | |
225 | } | |
226 | } | |
227 | ||
caa79468 PA |
228 | if set_event_fileoverlap { |
229 | state.set_event(SMBEvent::FileOverlap); | |
230 | } | |
4d58aaae | 231 | state.set_file_left(STREAM_TOCLIENT, rd.len, rd.data.len() as u32, file_guid.to_vec()); |
75d7c9d6 VJ |
232 | } |
233 | _ => { | |
ac4e8885 | 234 | SCLogDebug!("SMBv2: failed to parse read response"); |
75d7c9d6 VJ |
235 | state.set_event(SMBEvent::MalformedData); |
236 | } | |
237 | } | |
238 | } | |
239 | ||
240 | pub fn smb2_write_request_record<'b>(state: &mut SMBState, r: &Smb2Record<'b>) | |
241 | { | |
ac4e8885 | 242 | SCLogDebug!("SMBv2/WRITE: request record"); |
75d7c9d6 VJ |
243 | if smb2_create_new_tx(r.command) { |
244 | let tx_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_GENERICTX); | |
245 | let tx = state.new_generic_tx(2, r.command, tx_key); | |
246 | tx.request_done = true; | |
247 | } | |
248 | match parse_smb2_request_write(r.data) { | |
13b73997 | 249 | Ok((_, wr)) => { |
75d7c9d6 VJ |
250 | /* update key-guid map */ |
251 | let guid_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_GUID); | |
252 | state.ssn2vec_map.insert(guid_key, wr.guid.to_vec()); | |
253 | ||
254 | let file_guid = wr.guid.to_vec(); | |
255 | let file_name = match state.guid2name_map.get(&file_guid) { | |
256 | Some(n) => n.to_vec(), | |
257 | None => Vec::new(), | |
258 | }; | |
259 | ||
caa79468 | 260 | let mut set_event_fileoverlap = false; |
fb986abe | 261 | let found = match state.get_file_tx_by_fuid(&file_guid, STREAM_TOSERVER) { |
75d7c9d6 VJ |
262 | Some((tx, files, flags)) => { |
263 | if let Some(SMBTransactionTypeData::FILE(ref mut tdf)) = tx.type_data { | |
264 | let file_id : u32 = tx.id as u32; | |
caa79468 PA |
265 | if wr.wr_offset < tdf.file_tracker.tracked { |
266 | set_event_fileoverlap = true; | |
267 | } | |
75d7c9d6 VJ |
268 | filetracker_newchunk(&mut tdf.file_tracker, files, flags, |
269 | &file_name, wr.data, wr.wr_offset, | |
270 | wr.wr_len, 0, false, &file_id); | |
271 | } | |
272 | true | |
273 | }, | |
274 | None => { false }, | |
275 | }; | |
276 | if !found { | |
277 | let tree_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_SHARE); | |
ac4e8885 VJ |
278 | let (share_name, mut is_pipe) = match state.ssn2tree_map.get(&tree_key) { |
279 | Some(n) => { (n.name.to_vec(), n.is_pipe) }, | |
280 | _ => { (Vec::new(), false) }, | |
75d7c9d6 | 281 | }; |
ac4e8885 | 282 | let mut is_dcerpc = if is_pipe || (share_name.len() == 0 && !is_pipe) { |
69cf5c9e | 283 | match state.get_service_for_guid(wr.guid) { |
ac4e8885 VJ |
284 | (_, x) => x, |
285 | } | |
286 | } else { | |
287 | false | |
75d7c9d6 | 288 | }; |
4d044483 VJ |
289 | SCLogDebug!("SMBv2/WRITE: share_name {:?} is_pipe {} is_dcerpc {}", |
290 | share_name, is_pipe, is_dcerpc); | |
ac4e8885 VJ |
291 | |
292 | // if we missed the TREE connect we can't be sure if 'is_dcerpc' is correct | |
293 | if share_name.len() == 0 && !is_pipe { | |
294 | SCLogDebug!("SMBv2/WRITE: no tree connect seen, we don't know if we are a pipe"); | |
295 | ||
4d044483 VJ |
296 | if smb_dcerpc_probe(wr.data) == true { |
297 | SCLogDebug!("SMBv2/WRITE: looks like we have dcerpc"); | |
ac4e8885 | 298 | |
4d044483 VJ |
299 | let tree = SMBTree::new(b"suricata::dcerpc".to_vec(), true); |
300 | state.ssn2tree_map.insert(tree_key, tree); | |
301 | if !is_dcerpc { | |
302 | state.guid2name_map.insert(file_guid.to_vec(), | |
303 | b"suricata::dcerpc".to_vec()); | |
304 | } | |
305 | is_pipe = true; | |
306 | is_dcerpc = true; | |
307 | } else { | |
308 | SCLogDebug!("SMBv2/WRITE: not DCERPC"); | |
ac4e8885 VJ |
309 | } |
310 | } | |
75d7c9d6 VJ |
311 | if is_pipe && is_dcerpc { |
312 | SCLogDebug!("SMBv2 DCERPC write"); | |
313 | let hdr = SMBCommonHdr::from2(r, SMBHDR_TYPE_HEADER); | |
314 | let vercmd = SMBVerCmdStat::new2(SMB2_COMMAND_WRITE); | |
315 | smb_write_dcerpc_record(state, vercmd, hdr, wr.data); | |
316 | } else if is_pipe { | |
317 | SCLogDebug!("non-DCERPC pipe: skip rest of the record"); | |
aa8d64c2 | 318 | state.set_skip(STREAM_TOSERVER, wr.wr_len, wr.data.len() as u32); |
75d7c9d6 VJ |
319 | } else { |
320 | let (tx, files, flags) = state.new_file_tx(&file_guid, &file_name, STREAM_TOSERVER); | |
321 | if let Some(SMBTransactionTypeData::FILE(ref mut tdf)) = tx.type_data { | |
322 | let file_id : u32 = tx.id as u32; | |
caa79468 PA |
323 | if wr.wr_offset < tdf.file_tracker.tracked { |
324 | set_event_fileoverlap = true; | |
325 | } | |
75d7c9d6 VJ |
326 | filetracker_newchunk(&mut tdf.file_tracker, files, flags, |
327 | &file_name, wr.data, wr.wr_offset, | |
328 | wr.wr_len, 0, false, &file_id); | |
329 | } | |
330 | tx.vercmd.set_smb2_cmd(SMB2_COMMAND_WRITE); | |
331 | tx.hdr = SMBCommonHdr::new(SMBHDR_TYPE_HEADER, | |
332 | r.session_id, r.tree_id, 0); // TODO move into new_file_tx | |
333 | } | |
334 | } | |
caa79468 PA |
335 | |
336 | if set_event_fileoverlap { | |
337 | state.set_event(SMBEvent::FileOverlap); | |
338 | } | |
4d58aaae | 339 | state.set_file_left(STREAM_TOSERVER, wr.wr_len, wr.data.len() as u32, file_guid.to_vec()); |
75d7c9d6 VJ |
340 | }, |
341 | _ => { | |
342 | state.set_event(SMBEvent::MalformedData); | |
343 | }, | |
344 | } | |
345 | } | |
346 | ||
347 | pub fn smb2_request_record<'b>(state: &mut SMBState, r: &Smb2Record<'b>) | |
348 | { | |
349 | SCLogDebug!("SMBv2 request record, command {} tree {} session {}", | |
350 | &smb2_command_string(r.command), r.tree_id, r.session_id); | |
351 | ||
75d7c9d6 VJ |
352 | let mut events : Vec<SMBEvent> = Vec::new(); |
353 | ||
354 | let have_tx = match r.command { | |
7b61f2c5 VJ |
355 | SMB2_COMMAND_SET_INFO => { |
356 | SCLogDebug!("SMB2_COMMAND_SET_INFO: {:?}", r); | |
357 | let have_si_tx = match parse_smb2_request_setinfo(r.data) { | |
13b73997 | 358 | Ok((_, rd)) => { |
7b61f2c5 VJ |
359 | SCLogDebug!("SMB2_COMMAND_SET_INFO: {:?}", rd); |
360 | ||
361 | if let Some(ref ren) = rd.rename { | |
362 | let tx_hdr = SMBCommonHdr::from2(r, SMBHDR_TYPE_GENERICTX); | |
363 | let mut newname = ren.name.to_vec(); | |
364 | newname.retain(|&i|i != 0x00); | |
365 | let oldname = match state.guid2name_map.get(rd.guid) { | |
366 | Some(n) => { n.to_vec() }, | |
367 | None => { b"<unknown>".to_vec() }, | |
368 | }; | |
369 | let tx = state.new_rename_tx(rd.guid.to_vec(), oldname, newname); | |
370 | tx.hdr = tx_hdr; | |
371 | tx.request_done = true; | |
372 | tx.vercmd.set_smb2_cmd(SMB2_COMMAND_SET_INFO); | |
373 | true | |
374 | } else { | |
375 | false | |
376 | } | |
377 | }, | |
13b73997 | 378 | Err(nom::Err::Incomplete(_n)) => { |
7b61f2c5 VJ |
379 | SCLogDebug!("SMB2_COMMAND_SET_INFO: {:?}", _n); |
380 | events.push(SMBEvent::MalformedData); | |
381 | false | |
382 | }, | |
13b73997 PC |
383 | Err(nom::Err::Error(_e)) | |
384 | Err(nom::Err::Failure(_e)) => { | |
7b61f2c5 VJ |
385 | SCLogDebug!("SMB2_COMMAND_SET_INFO: {:?}", _e); |
386 | events.push(SMBEvent::MalformedData); | |
387 | false | |
388 | }, | |
389 | }; | |
390 | have_si_tx | |
391 | }, | |
75d7c9d6 | 392 | SMB2_COMMAND_IOCTL => { |
283be3ca VJ |
393 | smb2_ioctl_request_record(state, r); |
394 | true | |
75d7c9d6 VJ |
395 | }, |
396 | SMB2_COMMAND_TREE_DISCONNECT => { | |
397 | let tree_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_SHARE); | |
398 | state.ssn2tree_map.remove(&tree_key); | |
399 | false | |
400 | } | |
401 | SMB2_COMMAND_NEGOTIATE_PROTOCOL => { | |
402 | match parse_smb2_request_negotiate_protocol(r.data) { | |
13b73997 | 403 | Ok((_, rd)) => { |
75d7c9d6 VJ |
404 | let mut dialects : Vec<Vec<u8>> = Vec::new(); |
405 | for d in rd.dialects_vec { | |
406 | SCLogDebug!("dialect {:x} => {}", d, &smb2_dialect_string(d)); | |
407 | let dvec = smb2_dialect_string(d).as_bytes().to_vec(); | |
408 | dialects.push(dvec); | |
409 | } | |
410 | ||
411 | let found = match state.get_negotiate_tx(2) { | |
412 | Some(_) => { | |
ea1e13cb | 413 | SCLogDebug!("WEIRD, should not have NEGOTIATE tx!"); |
75d7c9d6 VJ |
414 | true |
415 | }, | |
416 | None => { false }, | |
417 | }; | |
418 | if !found { | |
419 | let tx = state.new_negotiate_tx(2); | |
420 | if let Some(SMBTransactionTypeData::NEGOTIATE(ref mut tdn)) = tx.type_data { | |
421 | tdn.dialects2 = dialects; | |
6d56edc3 | 422 | tdn.client_guid = Some(rd.client_guid.to_vec()); |
75d7c9d6 VJ |
423 | } |
424 | tx.request_done = true; | |
425 | } | |
426 | true | |
427 | }, | |
428 | _ => { | |
429 | events.push(SMBEvent::MalformedData); | |
430 | false | |
431 | }, | |
432 | } | |
433 | }, | |
434 | SMB2_COMMAND_SESSION_SETUP => { | |
8bef1208 VJ |
435 | smb2_session_setup_request(state, r); |
436 | true | |
75d7c9d6 VJ |
437 | }, |
438 | SMB2_COMMAND_TREE_CONNECT => { | |
439 | match parse_smb2_request_tree_connect(r.data) { | |
13b73997 | 440 | Ok((_, tr)) => { |
75d7c9d6 VJ |
441 | let name_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_TREE); |
442 | let mut name_val = tr.share_name.to_vec(); | |
443 | name_val.retain(|&i|i != 0x00); | |
444 | if name_val.len() > 1 { | |
445 | name_val = name_val[1..].to_vec(); | |
446 | } | |
447 | ||
448 | let tx = state.new_treeconnect_tx(name_key, name_val); | |
449 | tx.request_done = true; | |
450 | tx.vercmd.set_smb2_cmd(SMB2_COMMAND_TREE_CONNECT); | |
451 | true | |
452 | } | |
453 | _ => { | |
454 | events.push(SMBEvent::MalformedData); | |
455 | false | |
456 | }, | |
457 | } | |
458 | }, | |
459 | SMB2_COMMAND_READ => { | |
460 | match parse_smb2_request_read(r.data) { | |
13b73997 | 461 | Ok((_, rd)) => { |
75d7c9d6 VJ |
462 | SCLogDebug!("SMBv2 READ: GUID {:?} requesting {} bytes at offset {}", |
463 | rd.guid, rd.rd_len, rd.rd_offset); | |
464 | ||
465 | // store read guid,offset in map | |
466 | let guid_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_OFFSET); | |
467 | let guidoff = SMBFileGUIDOffset::new(rd.guid.to_vec(), rd.rd_offset); | |
468 | state.ssn2vecoffset_map.insert(guid_key, guidoff); | |
469 | }, | |
470 | _ => { | |
471 | events.push(SMBEvent::MalformedData); | |
472 | }, | |
473 | } | |
474 | false | |
475 | }, | |
476 | SMB2_COMMAND_CREATE => { | |
477 | match parse_smb2_request_create(r.data) { | |
13b73997 | 478 | Ok((_, cr)) => { |
75d7c9d6 VJ |
479 | let del = cr.create_options & 0x0000_1000 != 0; |
480 | let dir = cr.create_options & 0x0000_0001 != 0; | |
481 | ||
482 | SCLogDebug!("create_options {:08x}", cr.create_options); | |
483 | ||
484 | let name_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_FILENAME); | |
485 | state.ssn2vec_map.insert(name_key, cr.data.to_vec()); | |
486 | ||
487 | let tx_hdr = SMBCommonHdr::from2(r, SMBHDR_TYPE_GENERICTX); | |
488 | let tx = state.new_create_tx(&cr.data.to_vec(), | |
489 | cr.disposition, del, dir, tx_hdr); | |
490 | tx.vercmd.set_smb2_cmd(r.command); | |
491 | SCLogDebug!("TS CREATE TX {} created", tx.id); | |
492 | true | |
493 | }, | |
494 | _ => { | |
495 | events.push(SMBEvent::MalformedData); | |
496 | false | |
497 | }, | |
498 | } | |
499 | }, | |
500 | SMB2_COMMAND_WRITE => { | |
69cf5c9e | 501 | smb2_write_request_record(state, r); |
75d7c9d6 VJ |
502 | true // write handling creates both file tx and generic tx |
503 | }, | |
504 | SMB2_COMMAND_CLOSE => { | |
505 | match parse_smb2_request_close(r.data) { | |
13b73997 | 506 | Ok((_, cd)) => { |
fb986abe | 507 | let found_ts = match state.get_file_tx_by_fuid(&cd.guid.to_vec(), STREAM_TOSERVER) { |
75d7c9d6 VJ |
508 | Some((tx, files, flags)) => { |
509 | if !tx.request_done { | |
510 | if let Some(SMBTransactionTypeData::FILE(ref mut tdf)) = tx.type_data { | |
511 | tdf.file_tracker.close(files, flags); | |
512 | } | |
513 | } | |
514 | tx.request_done = true; | |
515 | tx.response_done = true; | |
516 | tx.set_status(SMB_NTSTATUS_SUCCESS, false); | |
517 | true | |
518 | }, | |
519 | None => { false }, | |
520 | }; | |
fb986abe | 521 | let found_tc = match state.get_file_tx_by_fuid(&cd.guid.to_vec(), STREAM_TOCLIENT) { |
75d7c9d6 VJ |
522 | Some((tx, files, flags)) => { |
523 | if !tx.request_done { | |
524 | if let Some(SMBTransactionTypeData::FILE(ref mut tdf)) = tx.type_data { | |
525 | tdf.file_tracker.close(files, flags); | |
526 | } | |
527 | } | |
528 | tx.request_done = true; | |
529 | tx.response_done = true; | |
530 | tx.set_status(SMB_NTSTATUS_SUCCESS, false); | |
531 | true | |
532 | }, | |
533 | None => { false }, | |
534 | }; | |
535 | if !found_ts && !found_tc { | |
536 | SCLogDebug!("SMBv2: CLOSE(TS): no TX at GUID {:?}", cd.guid); | |
537 | } | |
538 | }, | |
539 | _ => { | |
540 | events.push(SMBEvent::MalformedData); | |
541 | }, | |
542 | } | |
543 | false | |
544 | }, | |
545 | _ => { | |
546 | false | |
547 | }, | |
548 | }; | |
549 | /* if we don't have a tx, create it here (maybe) */ | |
550 | if !have_tx { | |
551 | if smb2_create_new_tx(r.command) { | |
283be3ca | 552 | let tx_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_GENERICTX); |
75d7c9d6 VJ |
553 | let tx = state.new_generic_tx(2, r.command, tx_key); |
554 | SCLogDebug!("TS TX {} command {} created with session_id {} tree_id {} message_id {}", | |
283be3ca | 555 | tx.id, r.command, r.session_id, r.tree_id, r.message_id); |
75d7c9d6 VJ |
556 | tx.set_events(events); |
557 | } | |
558 | } | |
559 | } | |
560 | ||
75d7c9d6 VJ |
561 | pub fn smb2_response_record<'b>(state: &mut SMBState, r: &Smb2Record<'b>) |
562 | { | |
563 | SCLogDebug!("SMBv2 response record, command {} status {} tree {} session {} message {}", | |
564 | &smb2_command_string(r.command), &smb_ntstatus_string(r.nt_status), | |
565 | r.tree_id, r.session_id, r.message_id); | |
566 | ||
75d7c9d6 VJ |
567 | let mut events : Vec<SMBEvent> = Vec::new(); |
568 | ||
569 | let have_tx = match r.command { | |
570 | SMB2_COMMAND_IOCTL => { | |
283be3ca VJ |
571 | smb2_ioctl_response_record(state, r); |
572 | true | |
75d7c9d6 VJ |
573 | }, |
574 | SMB2_COMMAND_SESSION_SETUP => { | |
8bef1208 | 575 | smb2_session_setup_response(state, r); |
75d7c9d6 VJ |
576 | true |
577 | }, | |
578 | SMB2_COMMAND_WRITE => { | |
ecbf10da VJ |
579 | if r.nt_status == SMB_NTSTATUS_SUCCESS { |
580 | match parse_smb2_response_write(r.data) | |
581 | { | |
ef575533 PA |
582 | Ok((_, _wr)) => { |
583 | SCLogDebug!("SMBv2: Write response => {:?}", _wr); | |
ecbf10da VJ |
584 | |
585 | /* search key-guid map */ | |
586 | let guid_key = SMBCommonHdr::new(SMBHDR_TYPE_GUID, | |
587 | r.session_id, r.tree_id, r.message_id); | |
ef575533 | 588 | let _guid_vec = match state.ssn2vec_map.remove(&guid_key) { |
ecbf10da VJ |
589 | Some(p) => p, |
590 | None => { | |
591 | SCLogDebug!("SMBv2 response: GUID NOT FOUND"); | |
592 | Vec::new() | |
593 | }, | |
594 | }; | |
ef575533 | 595 | SCLogDebug!("SMBv2 write response for GUID {:?}", _guid_vec); |
ecbf10da VJ |
596 | } |
597 | _ => { | |
598 | events.push(SMBEvent::MalformedData); | |
599 | }, | |
75d7c9d6 | 600 | } |
75d7c9d6 VJ |
601 | } |
602 | false // the request may have created a generic tx, so handle that here | |
603 | }, | |
604 | SMB2_COMMAND_READ => { | |
ac4e8885 VJ |
605 | if r.nt_status == SMB_NTSTATUS_SUCCESS || |
606 | r.nt_status == SMB_NTSTATUS_BUFFER_OVERFLOW { | |
69cf5c9e | 607 | smb2_read_response_record(state, r); |
75d7c9d6 VJ |
608 | false |
609 | ||
610 | } else if r.nt_status == SMB_NTSTATUS_END_OF_FILE { | |
611 | SCLogDebug!("SMBv2: read response => EOF"); | |
612 | ||
613 | let guid_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_OFFSET); | |
614 | let file_guid = match state.ssn2vecoffset_map.remove(&guid_key) { | |
615 | Some(o) => o.guid, | |
616 | _ => { | |
ea1e13cb | 617 | SCLogDebug!("SMBv2 READ response: reply to unknown request"); |
75d7c9d6 VJ |
618 | Vec::new() |
619 | }, | |
620 | }; | |
fb986abe | 621 | let found = match state.get_file_tx_by_fuid(&file_guid, STREAM_TOCLIENT) { |
75d7c9d6 VJ |
622 | Some((tx, files, flags)) => { |
623 | if !tx.request_done { | |
624 | if let Some(SMBTransactionTypeData::FILE(ref mut tdf)) = tx.type_data { | |
625 | tdf.file_tracker.close(files, flags); | |
626 | } | |
627 | } | |
628 | tx.set_status(r.nt_status, false); | |
629 | tx.request_done = true; | |
630 | false | |
631 | }, | |
632 | None => { false }, | |
633 | }; | |
634 | if !found { | |
635 | SCLogDebug!("SMBv2 READ: no TX at GUID {:?}", file_guid); | |
636 | } | |
637 | false | |
638 | } else { | |
ea1e13cb | 639 | SCLogDebug!("SMBv2 READ: status {}", &smb_ntstatus_string(r.nt_status)); |
75d7c9d6 VJ |
640 | false |
641 | } | |
642 | }, | |
643 | SMB2_COMMAND_CREATE => { | |
644 | if r.nt_status == SMB_NTSTATUS_SUCCESS { | |
645 | match parse_smb2_response_create(r.data) { | |
13b73997 | 646 | Ok((_, cr)) => { |
75d7c9d6 VJ |
647 | SCLogDebug!("SMBv2: Create response => {:?}", cr); |
648 | ||
649 | let guid_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_FILENAME); | |
0e05ef73 VJ |
650 | if let Some(mut p) = state.ssn2vec_map.remove(&guid_key) { |
651 | p.retain(|&i|i != 0x00); | |
652 | state.guid2name_map.insert(cr.guid.to_vec(), p); | |
653 | } else { | |
654 | SCLogDebug!("SMBv2 response: GUID NOT FOUND"); | |
655 | } | |
656 | ||
657 | let tx_hdr = SMBCommonHdr::from2(r, SMBHDR_TYPE_GENERICTX); | |
658 | if let Some(tx) = state.get_generic_tx(2, r.command, &tx_hdr) { | |
659 | SCLogDebug!("tx {} with {}/{} marked as done", | |
660 | tx.id, r.command, &smb2_command_string(r.command)); | |
661 | tx.set_status(r.nt_status, false); | |
662 | tx.response_done = true; | |
663 | ||
664 | if let Some(SMBTransactionTypeData::CREATE(ref mut tdn)) = tx.type_data { | |
665 | tdn.create_ts = cr.create_ts.as_unix(); | |
666 | tdn.last_access_ts = cr.last_access_ts.as_unix(); | |
667 | tdn.last_write_ts = cr.last_write_ts.as_unix(); | |
668 | tdn.last_change_ts = cr.last_change_ts.as_unix(); | |
669 | tdn.size = cr.size; | |
fb986abe | 670 | tdn.guid = cr.guid.to_vec(); |
0e05ef73 | 671 | } |
75d7c9d6 VJ |
672 | } |
673 | } | |
674 | _ => { | |
675 | events.push(SMBEvent::MalformedData); | |
676 | }, | |
677 | } | |
0e05ef73 VJ |
678 | true |
679 | } else { | |
680 | false | |
75d7c9d6 | 681 | } |
75d7c9d6 VJ |
682 | }, |
683 | SMB2_COMMAND_TREE_DISCONNECT => { | |
684 | // normally removed when processing request, | |
685 | // but in case we missed that try again here | |
686 | let tree_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_SHARE); | |
687 | state.ssn2tree_map.remove(&tree_key); | |
688 | false | |
689 | } | |
690 | SMB2_COMMAND_TREE_CONNECT => { | |
691 | if r.nt_status == SMB_NTSTATUS_SUCCESS { | |
692 | match parse_smb2_response_tree_connect(r.data) { | |
13b73997 | 693 | Ok((_, tr)) => { |
75d7c9d6 VJ |
694 | let name_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_TREE); |
695 | let mut share_name = Vec::new(); | |
696 | let is_pipe = tr.share_type == 2; | |
697 | let found = match state.get_treeconnect_tx(name_key) { | |
698 | Some(tx) => { | |
699 | if let Some(SMBTransactionTypeData::TREECONNECT(ref mut tdn)) = tx.type_data { | |
c56f5e11 | 700 | tdn.share_type = tr.share_type; |
75d7c9d6 VJ |
701 | tdn.is_pipe = is_pipe; |
702 | tdn.tree_id = r.tree_id as u32; | |
703 | share_name = tdn.share_name.to_vec(); | |
704 | } | |
705 | // update hdr now that we have a tree_id | |
706 | tx.hdr = SMBCommonHdr::from2(r, SMBHDR_TYPE_HEADER); | |
707 | tx.response_done = true; | |
708 | tx.set_status(r.nt_status, false); | |
709 | true | |
710 | }, | |
711 | None => { false }, | |
712 | }; | |
713 | if found { | |
714 | let tree = SMBTree::new(share_name.to_vec(), is_pipe); | |
715 | let tree_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_SHARE); | |
716 | state.ssn2tree_map.insert(tree_key, tree); | |
717 | } | |
718 | true | |
719 | } | |
720 | _ => { | |
721 | events.push(SMBEvent::MalformedData); | |
722 | false | |
723 | }, | |
724 | } | |
725 | } else { | |
726 | let name_key = SMBCommonHdr::from2(r, SMBHDR_TYPE_TREE); | |
727 | let found = match state.get_treeconnect_tx(name_key) { | |
728 | Some(tx) => { | |
729 | tx.response_done = true; | |
730 | tx.set_status(r.nt_status, false); | |
731 | true | |
732 | }, | |
733 | None => { false }, | |
734 | }; | |
735 | found | |
736 | } | |
737 | }, | |
738 | SMB2_COMMAND_NEGOTIATE_PROTOCOL => { | |
6d56edc3 VJ |
739 | let res = if r.nt_status == SMB_NTSTATUS_SUCCESS { |
740 | parse_smb2_response_negotiate_protocol(r.data) | |
741 | } else { | |
742 | parse_smb2_response_negotiate_protocol_error(r.data) | |
743 | }; | |
744 | match res { | |
13b73997 | 745 | Ok((_, rd)) => { |
75d7c9d6 VJ |
746 | SCLogDebug!("SERVER dialect => {}", &smb2_dialect_string(rd.dialect)); |
747 | ||
748 | state.dialect = rd.dialect; | |
749 | let found2 = match state.get_negotiate_tx(2) { | |
750 | Some(tx) => { | |
6d56edc3 VJ |
751 | if let Some(SMBTransactionTypeData::NEGOTIATE(ref mut tdn)) = tx.type_data { |
752 | tdn.server_guid = rd.server_guid.to_vec(); | |
753 | } | |
75d7c9d6 VJ |
754 | tx.set_status(r.nt_status, false); |
755 | tx.response_done = true; | |
756 | true | |
757 | }, | |
758 | None => { false }, | |
759 | }; | |
760 | // SMB2 response to SMB1 request? | |
761 | let found1 = !found2 && match state.get_negotiate_tx(1) { | |
762 | Some(tx) => { | |
6d56edc3 VJ |
763 | if let Some(SMBTransactionTypeData::NEGOTIATE(ref mut tdn)) = tx.type_data { |
764 | tdn.server_guid = rd.server_guid.to_vec(); | |
765 | } | |
75d7c9d6 VJ |
766 | tx.set_status(r.nt_status, false); |
767 | tx.response_done = true; | |
768 | true | |
769 | }, | |
ecbf10da | 770 | None => { false }, |
75d7c9d6 VJ |
771 | }; |
772 | found1 || found2 | |
773 | }, | |
774 | _ => { | |
775 | events.push(SMBEvent::MalformedData); | |
776 | false | |
777 | } | |
778 | } | |
779 | }, | |
780 | _ => { | |
781 | SCLogDebug!("default case: no TX"); | |
782 | false | |
783 | }, | |
784 | }; | |
785 | if !have_tx { | |
283be3ca | 786 | let tx_hdr = SMBCommonHdr::from2(r, SMBHDR_TYPE_GENERICTX); |
75d7c9d6 VJ |
787 | SCLogDebug!("looking for TX {} with session_id {} tree_id {} message_id {}", |
788 | &smb2_command_string(r.command), | |
283be3ca | 789 | r.session_id, r.tree_id, r.message_id); |
75d7c9d6 VJ |
790 | let _found = match state.get_generic_tx(2, r.command, &tx_hdr) { |
791 | Some(tx) => { | |
792 | SCLogDebug!("tx {} with {}/{} marked as done", | |
793 | tx.id, r.command, &smb2_command_string(r.command)); | |
794 | if r.nt_status != SMB_NTSTATUS_PENDING { | |
795 | tx.response_done = true; | |
796 | } | |
797 | tx.set_status(r.nt_status, false); | |
798 | tx.set_events(events); | |
799 | true | |
800 | }, | |
801 | _ => { | |
ea1e13cb | 802 | SCLogDebug!("no tx found for {:?}", r); |
75d7c9d6 VJ |
803 | false |
804 | }, | |
805 | }; | |
806 | } | |
807 | } |