22771398406

Committed 06 Mar 2026 04:05PM UTC coverage: 60.821% (-18.5%) from 79.291%

Build # 22771398406

Build Type

Pull #14969

github

Committed by

web-flow

Commit Message

Merge 4bff826f9 into 6ec9e5c95

Pull Request Pull Request #14969: suricata.yaml: add missing modbus logger v2

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87.56

/rust/src/ssh/ssh.rs

/* Copyright (C) 2020-2025 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 super::parser;
use crate::applayer::*;
use crate::core::*;
use crate::direction::Direction;
use crate::encryption::EncryptionHandling;
use crate::flow::Flow;
use crate::frames::Frame;
use nom8::Err;
use std::ffi::CString;
use std::sync::atomic::{AtomicBool, Ordering};
use suricata_sys::sys::{
    AppLayerParserState, AppProto, SCAppLayerParserConfParserEnabled,
    SCAppLayerParserRegisterLogger, SCAppLayerParserStateSetFlag,
    SCAppLayerProtoDetectConfProtoDetectionEnabled,
};

pub(super) static mut ALPROTO_SSH: AppProto = ALPROTO_UNKNOWN;
static HASSH_ENABLED: AtomicBool = AtomicBool::new(false);
static HASSH_DISABLED: AtomicBool = AtomicBool::new(false);

static mut ENCRYPTION_BYPASS_ENABLED: EncryptionHandling =
    EncryptionHandling::ENCRYPTION_HANDLING_TRACK_ONLY;

fn hassh_is_enabled() -> bool {
    HASSH_ENABLED.load(Ordering::Relaxed)
}

fn encryption_bypass_mode() -> EncryptionHandling {
    unsafe { ENCRYPTION_BYPASS_ENABLED }
}

#[derive(AppLayerFrameType)]
pub enum SshFrameType {
    RecordHdr,
    RecordData,
    RecordPdu,
}

#[derive(AppLayerEvent)]
pub enum SSHEvent {
    InvalidBanner,
    LongBanner,
    InvalidRecord,
    LongKexRecord,
}

#[repr(u8)]
#[derive(AppLayerState, Copy, Clone, PartialOrd, PartialEq, Eq)]
#[suricata(alstate_strip_prefix = "SshState")]
pub enum SSHConnectionState {
    SshStateInProgress = 0,
    SshStateBannerWaitEol = 1,
    SshStateBannerDone = 2,
    SshStateFinished = 3,
}

pub const SSH_MAX_BANNER_LEN: usize = 256;
const SSH_RECORD_HEADER_LEN: usize = 6;
const SSH_MAX_REASSEMBLED_RECORD_LEN: usize = 65535;

pub struct SshHeader {
    record_left: u32,
    record_left_msg: parser::MessageCode,

    flags: SSHConnectionState,
    pub protover: Vec<u8>,
    pub swver: Vec<u8>,

    pub hassh: Vec<u8>,
    pub hassh_string: Vec<u8>,
}

impl Default for SshHeader {
    fn default() -> Self {
        Self::new()
    }
}

impl SshHeader {
    pub fn new() -> SshHeader {
        Self {
            record_left: 0,
            record_left_msg: parser::MessageCode::Undefined(0),

            flags: SSHConnectionState::SshStateInProgress,
            protover: Vec::new(),
            swver: Vec::new(),

            hassh: Vec::new(),
            hassh_string: Vec::new(),
        }
    }
}

#[derive(Default)]
pub struct SSHTransaction {
    pub srv_hdr: SshHeader,
    pub cli_hdr: SshHeader,

    tx_data: AppLayerTxData,
}

#[derive(Default)]
pub struct SSHState {
    state_data: AppLayerStateData,
    transaction: SSHTransaction,
}

impl SSHState {
    pub fn new() -> Self {
        Default::default()
    }

    fn set_event(&mut self, event: SSHEvent) {
        self.transaction.tx_data.set_event(event as u8);
    }

    fn parse_record(
        &mut self, mut input: &[u8], resp: bool, pstate: *mut AppLayerParserState,
        flow: *mut Flow, stream_slice: &StreamSlice,
    ) -> AppLayerResult {
        let (hdr, ohdr) = if !resp {
            (&mut self.transaction.cli_hdr, &self.transaction.srv_hdr)
        } else {
            (&mut self.transaction.srv_hdr, &self.transaction.cli_hdr)
        };
        let il = input.len();
        //first skip record left bytes
        if hdr.record_left > 0 {
            //should we check for overflow ?
            let ilen = input.len() as u32;
            if hdr.record_left > ilen {
                hdr.record_left -= ilen;
                return AppLayerResult::ok();
            } else {
                let start = hdr.record_left as usize;
                match hdr.record_left_msg {
                    // parse reassembled tcp segments
                    parser::MessageCode::Kexinit if hassh_is_enabled() => {
                        if let Ok((_rem, key_exchange)) =
                            parser::ssh_parse_key_exchange(&input[..start])
                        {
                            key_exchange.generate_hassh(
                                &mut hdr.hassh_string,
                                &mut hdr.hassh,
                                &resp,
                            );
                        }
                        hdr.record_left_msg = parser::MessageCode::Undefined(0);
                    }
                    _ => {}
                }
                input = &input[start..];
                hdr.record_left = 0;
            }
        }
        //parse records out of input
        while !input.is_empty() {
            match parser::ssh_parse_record(input) {
                Ok((rem, head)) => {
                    let _pdu = Frame::new(
                        flow,
                        stream_slice,
                        input,
                        SSH_RECORD_HEADER_LEN as i64,
                        SshFrameType::RecordHdr as u8,
                        Some(0),
                    );
                    let _pdu = Frame::new(
                        flow,
                        stream_slice,
                        &input[SSH_RECORD_HEADER_LEN..],
                        (head.pkt_len - 2) as i64,
                        SshFrameType::RecordData as u8,
                        Some(0),
                    );
                    let _pdu = Frame::new(
                        flow,
                        stream_slice,
                        input,
                        (head.pkt_len + 4) as i64,
                        SshFrameType::RecordPdu as u8,
                        Some(0),
                    );
                    SCLogDebug!("SSH valid record {}", head);
                    match head.msg_code {
                        parser::MessageCode::Kexinit if hassh_is_enabled() => {
                            //let endkex = SSH_RECORD_HEADER_LEN + head.pkt_len - 2;
                            let endkex = input.len() - rem.len();
                            if let Ok((_, key_exchange)) = parser::ssh_parse_key_exchange(
                                &input[SSH_RECORD_HEADER_LEN..endkex],
                            ) {
                                key_exchange.generate_hassh(
                                    &mut hdr.hassh_string,
                                    &mut hdr.hassh,
                                    &resp,
                                );
                            }
                        }
                        parser::MessageCode::NewKeys => {
                            hdr.flags = SSHConnectionState::SshStateFinished;
                            if ohdr.flags >= SSHConnectionState::SshStateFinished {
                                let mut flags = 0;

                                match encryption_bypass_mode() {
                                    EncryptionHandling::ENCRYPTION_HANDLING_BYPASS => {
                                        flags |= APP_LAYER_PARSER_NO_INSPECTION
                                            | APP_LAYER_PARSER_NO_REASSEMBLY
                                            | APP_LAYER_PARSER_BYPASS_READY;
                                    }
                                    EncryptionHandling::ENCRYPTION_HANDLING_TRACK_ONLY => {
                                        flags |= APP_LAYER_PARSER_NO_INSPECTION;
                                    }
                                    _ => {}
                                }

                                if flags != 0 {
                                    unsafe {
                                        SCAppLayerParserStateSetFlag(pstate, flags);
                                    }
                                }
                            }
                        }
                        _ => {}
                    }

                    input = rem;
                    //header and complete data (not returned)
                }
                Err(Err::Incomplete(_)) => {
                    match parser::ssh_parse_record_header(input) {
                        Ok((rem, head)) => {
                            let _pdu = Frame::new(
                                flow,
                                stream_slice,
                                input,
                                SSH_RECORD_HEADER_LEN as i64,
                                SshFrameType::RecordHdr as u8,
                                Some(0),
                            );
                            let _pdu = Frame::new(
                                flow,
                                stream_slice,
                                &input[SSH_RECORD_HEADER_LEN..],
                                (head.pkt_len - 2) as i64,
                                SshFrameType::RecordData as u8,
                                Some(0),
                            );
                            let _pdu = Frame::new(
                                flow,
                                stream_slice,
                                input,
                                // cast first to avoid unsigned integer overflow
                                (head.pkt_len as u64 + 4) as i64,
                                SshFrameType::RecordPdu as u8,
                                Some(0),
                            );
                            SCLogDebug!("SSH valid record header {}", head);
                            let remlen = rem.len() as u32;
                            hdr.record_left = head.pkt_len - 2 - remlen;
                            //header with rem as incomplete data
                            match head.msg_code {
                                parser::MessageCode::NewKeys => {
                                    hdr.flags = SSHConnectionState::SshStateFinished;
                                }
                                parser::MessageCode::Kexinit if hassh_is_enabled() => {
                                    // check if buffer is bigger than maximum reassembled packet size
                                    hdr.record_left = head.pkt_len - 2;
                                    if hdr.record_left < SSH_MAX_REASSEMBLED_RECORD_LEN as u32 {
                                        // saving type of incomplete kex message
                                        hdr.record_left_msg = parser::MessageCode::Kexinit;
                                        return AppLayerResult::incomplete(
                                            (il - rem.len()) as u32,
                                            head.pkt_len - 2,
                                        );
                                    } else {
                                        SCLogDebug!("SSH buffer is bigger than maximum reassembled packet size");
                                        self.set_event(SSHEvent::LongKexRecord);
                                    }
                                }
                                _ => {}
                            }
                            return AppLayerResult::ok();
                        }
                        Err(Err::Incomplete(_)) => {
                            //we may have consumed data from previous records
                            debug_validate_bug_on!(input.len() >= SSH_RECORD_HEADER_LEN);
                            //do not trust nom incomplete value
                            return AppLayerResult::incomplete(
                                (il - input.len()) as u32,
                                SSH_RECORD_HEADER_LEN as u32,
                            );
                        }
                        Err(_e) => {
                            SCLogDebug!("SSH invalid record header {}", _e);
                            self.set_event(SSHEvent::InvalidRecord);
                            return AppLayerResult::err();
                        }
                    }
                }
                Err(_e) => {
                    SCLogDebug!("SSH invalid record {}", _e);
                    self.set_event(SSHEvent::InvalidRecord);
                    return AppLayerResult::err();
                }
            }
        }
        return AppLayerResult::ok();
    }

    fn parse_banner(
        &mut self, input: &[u8], resp: bool, pstate: *mut AppLayerParserState, flow: *mut Flow,
        stream_slice: &StreamSlice,
    ) -> AppLayerResult {
        let hdr = if !resp {
            &mut self.transaction.cli_hdr
        } else {
            &mut self.transaction.srv_hdr
        };
        if hdr.flags == SSHConnectionState::SshStateBannerWaitEol {
            match parser::ssh_parse_line(input) {
                Ok((rem, _)) => {
                    let mut r = self.parse_record(rem, resp, pstate, flow, stream_slice);
                    if r.is_incomplete() {
                        //adds bytes consumed by banner to incomplete result
                        r.consumed += (input.len() - rem.len()) as u32;
                    } else if r.is_ok() {
                        let mut dir = Direction::ToServer as i32;
                        if resp {
                            dir = Direction::ToClient as i32;
                        }
                        sc_app_layer_parser_trigger_raw_stream_inspection(flow, dir);
                    }
                    return r;
                }
                Err(Err::Incomplete(_)) => {
                    // we do not need to retain these bytes
                    // we parsed them, we skip them
                    return AppLayerResult::ok();
                }
                Err(_e) => {
                    SCLogDebug!("SSH invalid banner {}", _e);
                    self.set_event(SSHEvent::InvalidBanner);
                    return AppLayerResult::err();
                }
            }
        }
        match parser::ssh_parse_line(input) {
            Ok((rem, line)) => {
                if let Ok((_, banner)) = parser::ssh_parse_banner(line) {
                    hdr.protover.extend(banner.protover);
                    if !banner.swver.is_empty() {
                        hdr.swver.extend(banner.swver);
                    }
                    hdr.flags = SSHConnectionState::SshStateBannerDone;
                } else {
                    SCLogDebug!("SSH invalid banner");
                    self.set_event(SSHEvent::InvalidBanner);
                    return AppLayerResult::err();
                }
                if line.len() >= SSH_MAX_BANNER_LEN {
                    SCLogDebug!(
                        "SSH banner too long {} vs {}",
                        line.len(),
                        SSH_MAX_BANNER_LEN
                    );
                    self.set_event(SSHEvent::LongBanner);
                }
                let mut r = self.parse_record(rem, resp, pstate, flow, stream_slice);
                if r.is_incomplete() {
                    //adds bytes consumed by banner to incomplete result
                    r.consumed += (input.len() - rem.len()) as u32;
                } else if r.is_ok() {
                    let mut dir = Direction::ToServer as i32;
                    if resp {
                        dir = Direction::ToClient as i32;
                    }
                    sc_app_layer_parser_trigger_raw_stream_inspection(flow, dir);
                }
                return r;
            }
            Err(Err::Incomplete(_)) => {
                // see https://github.com/rust-lang/rust-clippy/issues/15158
                #[allow(clippy::collapsible_else_if)]
                if input.len() < SSH_MAX_BANNER_LEN {
                    //0 consumed, needs at least one more byte
                    return AppLayerResult::incomplete(0_u32, (input.len() + 1) as u32);
                } else {
                    SCLogDebug!(
                        "SSH banner too long {} vs {} and waiting for eol",
                        input.len(),
                        SSH_MAX_BANNER_LEN
                    );
                    if let Ok((_, banner)) = parser::ssh_parse_banner(input) {
                        hdr.protover.extend(banner.protover);
                        if !banner.swver.is_empty() {
                            hdr.swver.extend(banner.swver);
                        }
                        hdr.flags = SSHConnectionState::SshStateBannerWaitEol;
                        self.set_event(SSHEvent::LongBanner);
                        return AppLayerResult::ok();
                    } else {
                        self.set_event(SSHEvent::InvalidBanner);
                        return AppLayerResult::err();
                    }
                }
            }
            Err(_e) => {
                SCLogDebug!("SSH invalid banner {}", _e);
                self.set_event(SSHEvent::InvalidBanner);
                return AppLayerResult::err();
            }
        }
    }
}

// C exports.

export_tx_data_get!(ssh_get_tx_data, SSHTransaction);
export_state_data_get!(ssh_get_state_data, SSHState);

extern "C" fn ssh_state_new(
    _orig_state: *mut std::os::raw::c_void, _orig_proto: AppProto,
) -> *mut std::os::raw::c_void {
    let state = SSHState::new();
    let boxed = Box::new(state);
    return Box::into_raw(boxed) as *mut _;
}

unsafe extern "C" fn ssh_state_free(state: *mut std::os::raw::c_void) {
    std::mem::drop(Box::from_raw(state as *mut SSHState));
}

extern "C" fn ssh_state_tx_free(_state: *mut std::os::raw::c_void, _tx_id: u64) {
    //do nothing
}

unsafe extern "C" fn ssh_parse_request(
    flow: *mut Flow, state: *mut std::os::raw::c_void, pstate: *mut AppLayerParserState,
    stream_slice: StreamSlice, _data: *mut std::os::raw::c_void,
) -> AppLayerResult {
    let state = &mut cast_pointer!(state, SSHState);
    let buf = stream_slice.as_slice();
    let hdr = &mut state.transaction.cli_hdr;
    state.transaction.tx_data.0.updated_ts = true;
    if hdr.flags < SSHConnectionState::SshStateBannerDone {
        return state.parse_banner(buf, false, pstate, flow, &stream_slice);
    } else {
        return state.parse_record(buf, false, pstate, flow, &stream_slice);
    }
}

unsafe extern "C" fn ssh_parse_response(
    flow: *mut Flow, state: *mut std::os::raw::c_void, pstate: *mut AppLayerParserState,
    stream_slice: StreamSlice, _data: *mut std::os::raw::c_void,
) -> AppLayerResult {
    let state = &mut cast_pointer!(state, SSHState);
    let buf = stream_slice.as_slice();
    let hdr = &mut state.transaction.srv_hdr;
    state.transaction.tx_data.0.updated_tc = true;
    if hdr.flags < SSHConnectionState::SshStateBannerDone {
        return state.parse_banner(buf, true, pstate, flow, &stream_slice);
    } else {
        return state.parse_record(buf, true, pstate, flow, &stream_slice);
    }
}

#[no_mangle]
pub unsafe extern "C" fn SCSshStateGetTx(
    state: *mut std::os::raw::c_void, _tx_id: u64,
) -> *mut std::os::raw::c_void {
    let state = cast_pointer!(state, SSHState);
    return &state.transaction as *const _ as *mut _;
}

extern "C" fn ssh_state_get_tx_count(_state: *mut std::os::raw::c_void) -> u64 {
    return 1;
}

#[no_mangle]
pub unsafe extern "C" fn SCSshTxGetFlags(
    tx: *mut std::os::raw::c_void, direction: u8,
) -> SSHConnectionState {
    let tx = cast_pointer!(tx, SSHTransaction);
    if direction == u8::from(Direction::ToServer) {
        return tx.cli_hdr.flags;
    } else {
        return tx.srv_hdr.flags;
    }
}

#[no_mangle]
pub unsafe extern "C" fn SCSshTxGetAlStateProgress(
    tx: *mut std::os::raw::c_void, direction: u8,
) -> std::os::raw::c_int {
    let tx = cast_pointer!(tx, SSHTransaction);

    if tx.cli_hdr.flags >= SSHConnectionState::SshStateFinished
        && tx.srv_hdr.flags >= SSHConnectionState::SshStateFinished
    {
        return SSHConnectionState::SshStateFinished as i32;
    }

    if direction == u8::from(Direction::ToServer) {
        if tx.cli_hdr.flags >= SSHConnectionState::SshStateBannerDone {
            return SSHConnectionState::SshStateBannerDone as i32;
        }
    } else if tx.srv_hdr.flags >= SSHConnectionState::SshStateBannerDone {
        return SSHConnectionState::SshStateBannerDone as i32;
    }

    return SSHConnectionState::SshStateInProgress as i32;
}

// Parser name as a C style string.
const PARSER_NAME: &[u8] = b"ssh\0";

#[no_mangle]
pub unsafe extern "C" fn SCRegisterSshParser() {
    let parser = RustParser {
        name: PARSER_NAME.as_ptr() as *const std::os::raw::c_char,
        default_port: std::ptr::null(),
        ipproto: IPPROTO_TCP,
        //simple patterns, no probing
        probe_ts: None,
        probe_tc: None,
        min_depth: 0,
        max_depth: 0,
        state_new: ssh_state_new,
        state_free: ssh_state_free,
        tx_free: ssh_state_tx_free,
        parse_ts: ssh_parse_request,
        parse_tc: ssh_parse_response,
        get_tx_count: ssh_state_get_tx_count,
        get_tx: SCSshStateGetTx,
        tx_comp_st_ts: SSHConnectionState::SshStateFinished as i32,
        tx_comp_st_tc: SSHConnectionState::SshStateFinished as i32,
        tx_get_progress: SCSshTxGetAlStateProgress,
        get_eventinfo: Some(SSHEvent::get_event_info),
        get_eventinfo_byid: Some(SSHEvent::get_event_info_by_id),
        localstorage_new: None,
        localstorage_free: None,
        get_tx_files: None,
        get_tx_iterator: None,
        get_tx_data: ssh_get_tx_data,
        get_state_data: ssh_get_state_data,
        apply_tx_config: None,
        flags: 0,
        get_frame_id_by_name: Some(SshFrameType::ffi_id_from_name),
        get_frame_name_by_id: Some(SshFrameType::ffi_name_from_id),
        get_state_id_by_name: Some(SSHConnectionState::ffi_id_from_name),
        get_state_name_by_id: Some(SSHConnectionState::ffi_name_from_id),
    };

    let ip_proto_str = CString::new("tcp").unwrap();

    if SCAppLayerProtoDetectConfProtoDetectionEnabled(ip_proto_str.as_ptr(), parser.name) != 0 {
        let alproto = applayer_register_protocol_detection(&parser, 1);
        ALPROTO_SSH = alproto;
        if SCAppLayerParserConfParserEnabled(ip_proto_str.as_ptr(), parser.name) != 0 {
            let _ = AppLayerRegisterParser(&parser, alproto);
        }
        SCAppLayerParserRegisterLogger(IPPROTO_TCP, ALPROTO_SSH);
        SCLogDebug!("Rust ssh parser registered.");
    } else {
        SCLogNotice!("Protocol detector and parser disabled for SSH.");
    }
}

#[no_mangle]
pub extern "C" fn SCSshEnableHassh() {
    if !HASSH_DISABLED.load(Ordering::Relaxed) {
        HASSH_ENABLED.store(true, Ordering::Relaxed)
    }
}

#[no_mangle]
pub extern "C" fn SCSshHasshIsEnabled() -> bool {
    hassh_is_enabled()
}

#[no_mangle]
pub extern "C" fn SCSshDisableHassh() {
    HASSH_DISABLED.store(true, Ordering::Relaxed)
}

#[no_mangle]
pub extern "C" fn SCSshEnableBypass(mode: EncryptionHandling) {
    unsafe {
        ENCRYPTION_BYPASS_ENABLED = mode;
    }
}

#[no_mangle]
pub unsafe extern "C" fn SCSshTxGetLogCondition(tx: *mut std::os::raw::c_void) -> bool {
    let tx = cast_pointer!(tx, SSHTransaction);

    if SCSshHasshIsEnabled() {
        if tx.cli_hdr.flags == SSHConnectionState::SshStateFinished
            && tx.srv_hdr.flags == SSHConnectionState::SshStateFinished
        {
            return true;
        }
    } else if tx.cli_hdr.flags == SSHConnectionState::SshStateBannerDone
        && tx.srv_hdr.flags == SSHConnectionState::SshStateBannerDone
    {
        return true;
    }
    return false;
}

1	/* Copyright (C) 2020-2025 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
18	use super::parser;
19	use crate::applayer::*;
20	use crate::core::*;
21	use crate::direction::Direction;
22	use crate::encryption::EncryptionHandling;
23	use crate::flow::Flow;
24	use crate::frames::Frame;
25	use nom8::Err;
26	use std::ffi::CString;
27	use std::sync::atomic::{AtomicBool, Ordering};
28	use suricata_sys::sys::{
29	AppLayerParserState, AppProto, SCAppLayerParserConfParserEnabled,
30	SCAppLayerParserRegisterLogger, SCAppLayerParserStateSetFlag,
31	SCAppLayerProtoDetectConfProtoDetectionEnabled,
32	};
33
34	pub(super) static mut ALPROTO_SSH: AppProto = ALPROTO_UNKNOWN;
35	static HASSH_ENABLED: AtomicBool = AtomicBool::new(false);
36	static HASSH_DISABLED: AtomicBool = AtomicBool::new(false);
37
38	static mut ENCRYPTION_BYPASS_ENABLED: EncryptionHandling =
39	EncryptionHandling::ENCRYPTION_HANDLING_TRACK_ONLY;
40
41	fn hassh_is_enabled() -> bool {	21,572✔
42	HASSH_ENABLED.load(Ordering::Relaxed)	21,572✔
43	}	21,572✔
44
45	fn encryption_bypass_mode() -> EncryptionHandling {	33✔
46	unsafe { ENCRYPTION_BYPASS_ENABLED }	33✔
47	}	33✔
48
49	#[derive(AppLayerFrameType)]
50	pub enum SshFrameType {
51	RecordHdr,
52	RecordData,
53	RecordPdu,
54	}
55
56	#[derive(AppLayerEvent)]	374✔
57	pub enum SSHEvent {
58	InvalidBanner,
59	LongBanner,
60	InvalidRecord,
61	LongKexRecord,
62	}
63
64	#[repr(u8)]
65	#[derive(AppLayerState, Copy, Clone, PartialOrd, PartialEq, Eq)]
66	#[suricata(alstate_strip_prefix = "SshState")]
67	pub enum SSHConnectionState {
68	SshStateInProgress = 0,
69	SshStateBannerWaitEol = 1,
70	SshStateBannerDone = 2,
71	SshStateFinished = 3,
72	}
73
74	pub const SSH_MAX_BANNER_LEN: usize = 256;
75	const SSH_RECORD_HEADER_LEN: usize = 6;
76	const SSH_MAX_REASSEMBLED_RECORD_LEN: usize = 65535;
77
78	pub struct SshHeader {
79	record_left: u32,
80	record_left_msg: parser::MessageCode,
81
82	flags: SSHConnectionState,
83	pub protover: Vec<u8>,
84	pub swver: Vec<u8>,
85
86	pub hassh: Vec<u8>,
87	pub hassh_string: Vec<u8>,
88	}
89
90	impl Default for SshHeader {
91	fn default() -> Self {	316✔
92	Self::new()	316✔
93	}	316✔
94	}
95
96	impl SshHeader {
97	pub fn new() -> SshHeader {	316✔
98	Self {	316✔
99	record_left: 0,	316✔
100	record_left_msg: parser::MessageCode::Undefined(0),	316✔
101		316✔
102	flags: SSHConnectionState::SshStateInProgress,	316✔
103	protover: Vec::new(),	316✔
104	swver: Vec::new(),	316✔
105		316✔
106	hassh: Vec::new(),	316✔
107	hassh_string: Vec::new(),	316✔
108	}	316✔
109	}	316✔
110	}
111
112	#[derive(Default)]
113	pub struct SSHTransaction {
114	pub srv_hdr: SshHeader,
115	pub cli_hdr: SshHeader,
116
117	tx_data: AppLayerTxData,
118	}
119
120	#[derive(Default)]
121	pub struct SSHState {
122	state_data: AppLayerStateData,
123	transaction: SSHTransaction,
124	}
125
126	impl SSHState {
127	pub fn new() -> Self {	158✔
128	Default::default()	158✔
129	}	158✔
130
131	fn set_event(&mut self, event: SSHEvent) {	12✔
132	self.transaction.tx_data.set_event(event as u8);	12✔
133	}	12✔
134
135	fn parse_record(	1,026✔
136	&mut self, mut input: &[u8], resp: bool, pstate: *mut AppLayerParserState,	1,026✔
137	flow: *mut Flow, stream_slice: &StreamSlice,	1,026✔
138	) -> AppLayerResult {	1,026✔
139	let (hdr, ohdr) = if !resp {	1,026✔
140	(&mut self.transaction.cli_hdr, &self.transaction.srv_hdr)	453✔
141	} else {
142	(&mut self.transaction.srv_hdr, &self.transaction.cli_hdr)	573✔
143	};
144	let il = input.len();	1,026✔
145	//first skip record left bytes	1,026✔
146	if hdr.record_left > 0 {	1,026✔
147	//should we check for overflow ?
148	let ilen = input.len() as u32;	388✔
149	if hdr.record_left > ilen {	388✔
150	hdr.record_left -= ilen;	358✔
151	return AppLayerResult::ok();	358✔
152	} else {
153	let start = hdr.record_left as usize;	30✔
154	match hdr.record_left_msg {	29✔
155	// parse reassembled tcp segments
156	parser::MessageCode::Kexinit if hassh_is_enabled() => {	29✔
157	if let Ok((_rem, key_exchange)) =	20✔
158	parser::ssh_parse_key_exchange(&input[..start])	29✔
159	{	20✔
160	key_exchange.generate_hassh(	20✔
161	&mut hdr.hassh_string,	20✔
162	&mut hdr.hassh,	20✔
163	&resp,	20✔
164	);	20✔
165	}	20✔
166	hdr.record_left_msg = parser::MessageCode::Undefined(0);	29✔
167	}
168	_ => {}	1✔
169	}
170	input = &input[start..];	30✔
171	hdr.record_left = 0;	30✔
172	}
173	}	638✔
174	//parse records out of input
175	while !input.is_empty() {	1,052✔
176	match parser::ssh_parse_record(input) {	552✔
177	Ok((rem, head)) => {	384✔
178	let _pdu = Frame::new(	384✔
179	flow,	384✔
180	stream_slice,	384✔
181	input,	384✔
182	SSH_RECORD_HEADER_LEN as i64,	384✔
183	SshFrameType::RecordHdr as u8,	384✔
184	Some(0),	384✔
185	);	384✔
186	let _pdu = Frame::new(	384✔
187	flow,	384✔
188	stream_slice,	384✔
189	&input[SSH_RECORD_HEADER_LEN..],	384✔
190	(head.pkt_len - 2) as i64,	384✔
191	SshFrameType::RecordData as u8,	384✔
192	Some(0),	384✔
193	);	384✔
194	let _pdu = Frame::new(	384✔
195	flow,	384✔
196	stream_slice,	384✔
197	input,	384✔
198	(head.pkt_len + 4) as i64,	384✔
199	SshFrameType::RecordPdu as u8,	384✔
200	Some(0),	384✔
201	);	384✔
202	SCLogDebug!("SSH valid record {}", head);
203	match head.msg_code {	147✔
204	parser::MessageCode::Kexinit if hassh_is_enabled() => {	147✔
205	//let endkex = SSH_RECORD_HEADER_LEN + head.pkt_len - 2;	147✔
206	let endkex = input.len() - rem.len();	147✔
207	if let Ok((_, key_exchange)) = parser::ssh_parse_key_exchange(	147✔
208	&input[SSH_RECORD_HEADER_LEN..endkex],	147✔
209	) {	147✔
210	key_exchange.generate_hassh(	124✔
211	&mut hdr.hassh_string,	124✔
212	&mut hdr.hassh,	124✔
213	&resp,	124✔
214	);	124✔
215	}	124✔
216	}
217	parser::MessageCode::NewKeys => {
218	hdr.flags = SSHConnectionState::SshStateFinished;	94✔
219	if ohdr.flags >= SSHConnectionState::SshStateFinished {	94✔
220	let mut flags = 0;	33✔
221		33✔
222	match encryption_bypass_mode() {	33✔
223	EncryptionHandling::ENCRYPTION_HANDLING_BYPASS => {	×
224	flags \|= APP_LAYER_PARSER_NO_INSPECTION	×
225	\| APP_LAYER_PARSER_NO_REASSEMBLY	×
226	\| APP_LAYER_PARSER_BYPASS_READY;	×
227	}	×
228	EncryptionHandling::ENCRYPTION_HANDLING_TRACK_ONLY => {	33✔
229	flags \|= APP_LAYER_PARSER_NO_INSPECTION;	33✔
230	}	33✔
231	_ => {}	×
232	}
233
234	if flags != 0 {	33✔
235	unsafe {	33✔
236	SCAppLayerParserStateSetFlag(pstate, flags);	33✔
237	}	33✔
238	}	×
239	}	61✔
240	}
241	_ => {}	143✔
242	}
243
244	input = rem;	384✔
245	//header and complete data (not returned)
246	}
247	Err(Err::Incomplete(_)) => {
248	match parser::ssh_parse_record_header(input) {	168✔
249	Ok((rem, head)) => {	149✔
250	let _pdu = Frame::new(	149✔
251	flow,	149✔
252	stream_slice,	149✔
253	input,	149✔
254	SSH_RECORD_HEADER_LEN as i64,	149✔
255	SshFrameType::RecordHdr as u8,	149✔
256	Some(0),	149✔
257	);	149✔
258	let _pdu = Frame::new(	149✔
259	flow,	149✔
260	stream_slice,	149✔
261	&input[SSH_RECORD_HEADER_LEN..],	149✔
262	(head.pkt_len - 2) as i64,	149✔
263	SshFrameType::RecordData as u8,	149✔
264	Some(0),	149✔
265	);	149✔
266	let _pdu = Frame::new(	149✔
267	flow,	149✔
268	stream_slice,	149✔
269	input,	149✔
270	// cast first to avoid unsigned integer overflow	149✔
271	(head.pkt_len as u64 + 4) as i64,	149✔
272	SshFrameType::RecordPdu as u8,	149✔
273	Some(0),	149✔
274	);	149✔
275	SCLogDebug!("SSH valid record header {}", head);	149✔
276	let remlen = rem.len() as u32;	149✔
277	hdr.record_left = head.pkt_len - 2 - remlen;	149✔
278	//header with rem as incomplete data
279	match head.msg_code {	44✔
280	parser::MessageCode::NewKeys => {	4✔
281	hdr.flags = SSHConnectionState::SshStateFinished;	4✔
282	}	4✔
283	parser::MessageCode::Kexinit if hassh_is_enabled() => {	44✔
284	// check if buffer is bigger than maximum reassembled packet size	44✔
285	hdr.record_left = head.pkt_len - 2;	44✔
286	if hdr.record_left < SSH_MAX_REASSEMBLED_RECORD_LEN as u32 {	44✔
287	// saving type of incomplete kex message
288	hdr.record_left_msg = parser::MessageCode::Kexinit;	43✔
289	return AppLayerResult::incomplete(	43✔
290	(il - rem.len()) as u32,	43✔
291	head.pkt_len - 2,	43✔
292	);	43✔
293	} else {	1✔
294	SCLogDebug!("SSH buffer is bigger than maximum reassembled packet size");	1✔
295	self.set_event(SSHEvent::LongKexRecord);	1✔
296	}	1✔
297	}
298	_ => {}	101✔
299	}
300	return AppLayerResult::ok();	106✔
301	}
302	Err(Err::Incomplete(_)) => {
303	//we may have consumed data from previous records
304	debug_validate_bug_on!(input.len() >= SSH_RECORD_HEADER_LEN);
305	//do not trust nom incomplete value
306	return AppLayerResult::incomplete(	19✔
307	(il - input.len()) as u32,	19✔
308	SSH_RECORD_HEADER_LEN as u32,	19✔
309	);	19✔
310	}
311	Err(_e) => {	×
312	SCLogDebug!("SSH invalid record header {}", _e);	×
313	self.set_event(SSHEvent::InvalidRecord);	×
314	return AppLayerResult::err();	×
315	}
316	}
317	}
318	Err(_e) => {	×
319	SCLogDebug!("SSH invalid record {}", _e);	×
320	self.set_event(SSHEvent::InvalidRecord);	×
321	return AppLayerResult::err();	×
322	}
323	}
324	}
325	return AppLayerResult::ok();	500✔
326	}	1,026✔
327
328	fn parse_banner(	296✔
329	&mut self, input: &[u8], resp: bool, pstate: mut AppLayerParserState, flow: mut Flow,	296✔
330	stream_slice: &StreamSlice,	296✔
331	) -> AppLayerResult {	296✔
332	let hdr = if !resp {	296✔
333	&mut self.transaction.cli_hdr	152✔
334	} else {
335	&mut self.transaction.srv_hdr	144✔
336	};
337	if hdr.flags == SSHConnectionState::SshStateBannerWaitEol {	296✔
338	match parser::ssh_parse_line(input) {	1✔
339	Ok((rem, _)) => {	1✔
340	let mut r = self.parse_record(rem, resp, pstate, flow, stream_slice);	1✔
341	if r.is_incomplete() {	1✔
342	//adds bytes consumed by banner to incomplete result	×
343	r.consumed += (input.len() - rem.len()) as u32;	×
344	} else if r.is_ok() {	1✔
345	let mut dir = Direction::ToServer as i32;	1✔
346	if resp {	1✔
347	dir = Direction::ToClient as i32;	1✔
348	}	1✔
349	sc_app_layer_parser_trigger_raw_stream_inspection(flow, dir);	1✔
350	}	×
351	return r;	1✔
352	}
353	Err(Err::Incomplete(_)) => {
354	// we do not need to retain these bytes
355	// we parsed them, we skip them
356	return AppLayerResult::ok();	×
357	}
358	Err(_e) => {	×
359	SCLogDebug!("SSH invalid banner {}", _e);	×
360	self.set_event(SSHEvent::InvalidBanner);	×
361	return AppLayerResult::err();	×
362	}
363	}
364	}	295✔
365	match parser::ssh_parse_line(input) {	295✔
366	Ok((rem, line)) => {	281✔
367	if let Ok((_, banner)) = parser::ssh_parse_banner(line) {	281✔
368	hdr.protover.extend(banner.protover);	276✔
369	if !banner.swver.is_empty() {	276✔
370	hdr.swver.extend(banner.swver);	276✔
371	}	276✔
372	hdr.flags = SSHConnectionState::SshStateBannerDone;	276✔
373	} else {
374	SCLogDebug!("SSH invalid banner");
375	self.set_event(SSHEvent::InvalidBanner);	5✔
376	return AppLayerResult::err();	5✔
377	}
378	if line.len() >= SSH_MAX_BANNER_LEN {	276✔
379	SCLogDebug!(	2✔
380	"SSH banner too long {} vs {}",	2✔
381	line.len(),	2✔
382	SSH_MAX_BANNER_LEN	2✔
383	);	2✔
384	self.set_event(SSHEvent::LongBanner);	2✔
385	}	274✔
386	let mut r = self.parse_record(rem, resp, pstate, flow, stream_slice);	276✔
387	if r.is_incomplete() {	276✔
388	//adds bytes consumed by banner to incomplete result	60✔
389	r.consumed += (input.len() - rem.len()) as u32;	60✔
390	} else if r.is_ok() {	216✔
391	let mut dir = Direction::ToServer as i32;	216✔
392	if resp {	216✔
393	dir = Direction::ToClient as i32;	124✔
394	}	124✔
395	sc_app_layer_parser_trigger_raw_stream_inspection(flow, dir);	216✔
396	}	×
397	return r;	276✔
398	}
399	Err(Err::Incomplete(_)) => {
400	// see https://github.com/rust-lang/rust-clippy/issues/15158
401	#[allow(clippy::collapsible_else_if)]
402	if input.len() < SSH_MAX_BANNER_LEN {	14✔
403	//0 consumed, needs at least one more byte
404	return AppLayerResult::incomplete(0_u32, (input.len() + 1) as u32);	10✔
405	} else {
406	SCLogDebug!(
407	"SSH banner too long {} vs {} and waiting for eol",
408	input.len(),
409	SSH_MAX_BANNER_LEN
410	);
411	if let Ok((_, banner)) = parser::ssh_parse_banner(input) {	4✔
412	hdr.protover.extend(banner.protover);	2✔
413	if !banner.swver.is_empty() {	2✔
414	hdr.swver.extend(banner.swver);	2✔
415	}	2✔
416	hdr.flags = SSHConnectionState::SshStateBannerWaitEol;	2✔
417	self.set_event(SSHEvent::LongBanner);	2✔
418	return AppLayerResult::ok();	2✔
419	} else {
420	self.set_event(SSHEvent::InvalidBanner);	2✔
421	return AppLayerResult::err();	2✔
422	}
423	}
424	}
425	Err(_e) => {	×
426	SCLogDebug!("SSH invalid banner {}", _e);	×
427	self.set_event(SSHEvent::InvalidBanner);	×
428	return AppLayerResult::err();	×
429	}
430	}
431	}	296✔
432	}
433
434	// C exports.
435
436	export_tx_data_get!(ssh_get_tx_data, SSHTransaction);
437	export_state_data_get!(ssh_get_state_data, SSHState);
438
439	extern "C" fn ssh_state_new(	158✔
440	_orig_state: *mut std::os::raw::c_void, _orig_proto: AppProto,	158✔
441	) -> *mut std::os::raw::c_void {	158✔
442	let state = SSHState::new();	158✔
443	let boxed = Box::new(state);	158✔
444	return Box::into_raw(boxed) as *mut _;	158✔
445	}	158✔
446
447	unsafe extern "C" fn ssh_state_free(state: *mut std::os::raw::c_void) {	158✔
448	std::mem::drop(Box::from_raw(state as *mut SSHState));	158✔
449	}	158✔
450
451	extern "C" fn ssh_state_tx_free(_state: *mut std::os::raw::c_void, _tx_id: u64) {	22✔
452	//do nothing	22✔
453	}	22✔
454
455	unsafe extern "C" fn ssh_parse_request(	465✔
456	flow: mut Flow, state: mut std::os::raw::c_void, pstate: *mut AppLayerParserState,	465✔
457	stream_slice: StreamSlice, _data: *mut std::os::raw::c_void,	465✔
458	) -> AppLayerResult {	465✔
459	let state = &mut cast_pointer!(state, SSHState);	465✔
460	let buf = stream_slice.as_slice();	465✔
461	let hdr = &mut state.transaction.cli_hdr;	465✔
462	state.transaction.tx_data.0.updated_ts = true;	465✔
463	if hdr.flags < SSHConnectionState::SshStateBannerDone {	465✔
464	return state.parse_banner(buf, false, pstate, flow, &stream_slice);	152✔
465	} else {
466	return state.parse_record(buf, false, pstate, flow, &stream_slice);	313✔
467	}
468	}	465✔
469
470	unsafe extern "C" fn ssh_parse_response(	580✔
471	flow: mut Flow, state: mut std::os::raw::c_void, pstate: *mut AppLayerParserState,	580✔
472	stream_slice: StreamSlice, _data: *mut std::os::raw::c_void,	580✔
473	) -> AppLayerResult {	580✔
474	let state = &mut cast_pointer!(state, SSHState);	580✔
475	let buf = stream_slice.as_slice();	580✔
476	let hdr = &mut state.transaction.srv_hdr;	580✔
477	state.transaction.tx_data.0.updated_tc = true;	580✔
478	if hdr.flags < SSHConnectionState::SshStateBannerDone {	580✔
479	return state.parse_banner(buf, true, pstate, flow, &stream_slice);	144✔
480	} else {
481	return state.parse_record(buf, true, pstate, flow, &stream_slice);	436✔
482	}
483	}	580✔
484
485	#[no_mangle]
486	pub unsafe extern "C" fn SCSshStateGetTx(	6,498✔
487	state: *mut std::os::raw::c_void, _tx_id: u64,	6,498✔
488	) -> *mut std::os::raw::c_void {	6,498✔
489	let state = cast_pointer!(state, SSHState);	6,498✔
490	return &state.transaction as const _ as mut _;	6,498✔
491	}	6,498✔
492
493	extern "C" fn ssh_state_get_tx_count(_state: *mut std::os::raw::c_void) -> u64 {	9,603✔
494	return 1;	9,603✔
495	}	9,603✔
496
497	#[no_mangle]
498	pub unsafe extern "C" fn SCSshTxGetFlags(	×
499	tx: *mut std::os::raw::c_void, direction: u8,	×
500	) -> SSHConnectionState {	×
501	let tx = cast_pointer!(tx, SSHTransaction);	×
502	if direction == u8::from(Direction::ToServer) {	×
503	return tx.cli_hdr.flags;	×
504	} else {
505	return tx.srv_hdr.flags;	×
506	}
507	}	×
508
509	#[no_mangle]
510	pub unsafe extern "C" fn SCSshTxGetAlStateProgress(	8,388✔
511	tx: *mut std::os::raw::c_void, direction: u8,	8,388✔
512	) -> std::os::raw::c_int {	8,388✔
513	let tx = cast_pointer!(tx, SSHTransaction);	8,388✔
514		8,388✔
515	if tx.cli_hdr.flags >= SSHConnectionState::SshStateFinished	8,388✔
516	&& tx.srv_hdr.flags >= SSHConnectionState::SshStateFinished	2,778✔
517	{
518	return SSHConnectionState::SshStateFinished as i32;	248✔
519	}	8,140✔
520		8,140✔
521	if direction == u8::from(Direction::ToServer) {	8,140✔
522	if tx.cli_hdr.flags >= SSHConnectionState::SshStateBannerDone {	3,377✔
523	return SSHConnectionState::SshStateBannerDone as i32;	3,002✔
524	}	375✔
525	} else if tx.srv_hdr.flags >= SSHConnectionState::SshStateBannerDone {	4,763✔
526	return SSHConnectionState::SshStateBannerDone as i32;	4,209✔
527	}	554✔
528
529	return SSHConnectionState::SshStateInProgress as i32;	929✔
530	}	8,388✔
531
532	// Parser name as a C style string.
533	const PARSER_NAME: &[u8] = b"ssh\0";
534
535	#[no_mangle]
536	pub unsafe extern "C" fn SCRegisterSshParser() {	37✔
537	let parser = RustParser {	37✔
538	name: PARSER_NAME.as_ptr() as *const std::os::raw::c_char,	37✔
539	default_port: std::ptr::null(),	37✔
540	ipproto: IPPROTO_TCP,	37✔
541	//simple patterns, no probing	37✔
542	probe_ts: None,	37✔
543	probe_tc: None,	37✔
544	min_depth: 0,	37✔
545	max_depth: 0,	37✔
546	state_new: ssh_state_new,	37✔
547	state_free: ssh_state_free,	37✔
548	tx_free: ssh_state_tx_free,	37✔
549	parse_ts: ssh_parse_request,	37✔
550	parse_tc: ssh_parse_response,	37✔
551	get_tx_count: ssh_state_get_tx_count,	37✔
552	get_tx: SCSshStateGetTx,	37✔
553	tx_comp_st_ts: SSHConnectionState::SshStateFinished as i32,	37✔
554	tx_comp_st_tc: SSHConnectionState::SshStateFinished as i32,	37✔
555	tx_get_progress: SCSshTxGetAlStateProgress,	37✔
556	get_eventinfo: Some(SSHEvent::get_event_info),	37✔
557	get_eventinfo_byid: Some(SSHEvent::get_event_info_by_id),	37✔
558	localstorage_new: None,	37✔
559	localstorage_free: None,	37✔
560	get_tx_files: None,	37✔
561	get_tx_iterator: None,	37✔
562	get_tx_data: ssh_get_tx_data,	37✔
563	get_state_data: ssh_get_state_data,	37✔
564	apply_tx_config: None,	37✔
565	flags: 0,	37✔
566	get_frame_id_by_name: Some(SshFrameType::ffi_id_from_name),	37✔
567	get_frame_name_by_id: Some(SshFrameType::ffi_name_from_id),	37✔
568	get_state_id_by_name: Some(SSHConnectionState::ffi_id_from_name),	37✔
569	get_state_name_by_id: Some(SSHConnectionState::ffi_name_from_id),	37✔
570	};	37✔
571		37✔
572	let ip_proto_str = CString::new("tcp").unwrap();	37✔
573		37✔
574	if SCAppLayerProtoDetectConfProtoDetectionEnabled(ip_proto_str.as_ptr(), parser.name) != 0 {	37✔
575	let alproto = applayer_register_protocol_detection(&parser, 1);	37✔
576	ALPROTO_SSH = alproto;	37✔
577	if SCAppLayerParserConfParserEnabled(ip_proto_str.as_ptr(), parser.name) != 0 {	37✔
578	let _ = AppLayerRegisterParser(&parser, alproto);	37✔
579	}	37✔
580	SCAppLayerParserRegisterLogger(IPPROTO_TCP, ALPROTO_SSH);	37✔
581	SCLogDebug!("Rust ssh parser registered.");
582	} else {
583	SCLogNotice!("Protocol detector and parser disabled for SSH.");	×
584	}
585	}	37✔
586
587	#[no_mangle]
588	pub extern "C" fn SCSshEnableHassh() {	19,697✔
589	if !HASSH_DISABLED.load(Ordering::Relaxed) {	19,697✔
590	HASSH_ENABLED.store(true, Ordering::Relaxed)	19,697✔
591	}	×
592	}	19,697✔
593
594	#[no_mangle]
595	pub extern "C" fn SCSshHasshIsEnabled() -> bool {	21,352✔
596	hassh_is_enabled()	21,352✔
597	}	21,352✔
598
599	#[no_mangle]
600	pub extern "C" fn SCSshDisableHassh() {	×
601	HASSH_DISABLED.store(true, Ordering::Relaxed)	×
602	}	×
603
604	#[no_mangle]
605	pub extern "C" fn SCSshEnableBypass(mode: EncryptionHandling) {	×
606	unsafe {	×
607	ENCRYPTION_BYPASS_ENABLED = mode;	×
608	}	×
609	}	×
610
611	#[no_mangle]
612	pub unsafe extern "C" fn SCSshTxGetLogCondition(tx: *mut std::os::raw::c_void) -> bool {	1,657✔
613	let tx = cast_pointer!(tx, SSHTransaction);	1,657✔
614		1,657✔
615	if SCSshHasshIsEnabled() {	1,657✔
616	if tx.cli_hdr.flags == SSHConnectionState::SshStateFinished	1,657✔
617	&& tx.srv_hdr.flags == SSHConnectionState::SshStateFinished	566✔
618	{
619	return true;	×
620	}	1,657✔
621	} else if tx.cli_hdr.flags == SSHConnectionState::SshStateBannerDone	×
622	&& tx.srv_hdr.flags == SSHConnectionState::SshStateBannerDone	×
623	{
624	return true;	×
625	}	×
626	return false;	1,657✔
627	}	1,657✔

OISF / suricata / 22771398406

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