22553492142

Committed 01 Mar 2026 09:48PM UTC coverage: 70.74% (-2.9%) from 73.687%

Build # 22553492142

Build Type

Pull #14920

github

Committed by

web-flow

Commit Message

Merge e15a765bc into 90823fa90

Pull Request Pull Request #14920: draft: rust based configuration file parser and loader - v4

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38209 of 77306 branches covered (49.43%)

Branch coverage included in aggregate %.

533 of 779 new or added lines in 5 files covered. (68.42%)

11924 existing lines in 491 files now uncovered.

252429 of 333548 relevant lines covered (75.68%)

2403268.06 hits per line

Source File
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97.84

/rust/src/ssh/parser.rs

/* Copyright (C) 2020 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 digest::Digest;
use digest::Update;
use md5::Md5;
use nom8::branch::alt;
use nom8::bytes::streaming::{is_not, tag, take, take_while};
use nom8::character::streaming::char;
use nom8::combinator::{complete, eof, not, rest, verify};
use nom8::multi::length_data;
use nom8::number::streaming::{be_u32, be_u8};
use nom8::sequence::terminated;
use nom8::{IResult, Parser};
use std::fmt;

#[derive(PartialEq, Eq, Copy, Clone, Debug)]
pub enum MessageCode {
    Disconnect,
    Ignore,
    Unimplemented,
    Debug,
    ServiceRequest,
    ServiceAccept,
    Kexinit,
    NewKeys,
    KexdhInit,
    KexdhReply,

    Undefined(u8),
}

impl MessageCode {
    fn from_u8(value: u8) -> MessageCode {
        match value {
            1 => MessageCode::Disconnect,
            2 => MessageCode::Ignore,
            3 => MessageCode::Unimplemented,
            4 => MessageCode::Debug,
            5 => MessageCode::ServiceRequest,
            6 => MessageCode::ServiceAccept,
            20 => MessageCode::Kexinit,
            21 => MessageCode::NewKeys,
            30 => MessageCode::KexdhInit,
            31 => MessageCode::KexdhReply,
            _ => MessageCode::Undefined(value),
        }
    }
}

#[inline]
fn is_not_lineend(b: u8) -> bool {
    if b == 10 || b == 13 {
        return false;
    }
    return true;
}

//may leave \r at the end to be removed
pub fn ssh_parse_line(i: &[u8]) -> IResult<&[u8], &[u8]> {
    fn parser(i: &[u8]) -> IResult<&[u8], &[u8]> {
        let (i, bytes) = tag("\r")(i)?;
        let (i, _) = not(eof).parse(i)?;
        Ok((i, bytes))
    }
    terminated(
        take_while(is_not_lineend),
        alt((tag("\n"), tag("\r\n"), parser)),
    ).parse(i)
}

#[derive(PartialEq, Eq)]
pub struct SshBanner<'a> {
    pub protover: &'a [u8],
    pub swver: &'a [u8],
}

// Could be simplified adding dummy \n at the end
// or use nom5 nom::bytes::complete::is_not
pub fn ssh_parse_banner(i: &[u8]) -> IResult<&[u8], SshBanner<'_>> {
    let (i, _) = tag("SSH-")(i)?;
    let (i, protover) = is_not("-")(i)?;
    let (i, _) = char('-')(i)?;
    let (i, swver) = alt((complete(is_not(" \r\n")), rest)).parse(i)?;
    //remaining after space is comments
    Ok((i, SshBanner { protover, swver }))
}

#[derive(PartialEq, Eq)]
pub struct SshRecordHeader {
    pub pkt_len: u32,
    padding_len: u8,
    pub msg_code: MessageCode,
}

impl fmt::Display for SshRecordHeader {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(
            f,
            "(pkt_len:{}, padding_len:{}, msg_code:{:?})",
            self.pkt_len, self.padding_len, self.msg_code
        )
    }
}

pub fn ssh_parse_record_header(i: &[u8]) -> IResult<&[u8], SshRecordHeader> {
    let (i, pkt_len) = verify(be_u32, |&val| val > 1).parse(i)?;
    let (i, padding_len) = be_u8(i)?;
    let (i, msg_code) = be_u8(i)?;
    Ok((
        i,
        SshRecordHeader {
            pkt_len,
            padding_len,
            msg_code: MessageCode::from_u8(msg_code),
        },
    ))
}

//test for evasion against pkt_len=0or1...
pub fn ssh_parse_record(i: &[u8]) -> IResult<&[u8], SshRecordHeader> {
    let (i, pkt_len) = verify(be_u32, |&val| val > 1).parse(i)?;
    let (i, padding_len) = be_u8(i)?;
    let (i, msg_code) = be_u8(i)?;
    let (i, _) = take((pkt_len - 2) as usize)(i)?;
    Ok((
        i,
        SshRecordHeader {
            pkt_len,
            padding_len,
            msg_code: MessageCode::from_u8(msg_code),
        },
    ))
}

#[derive(Debug, PartialEq, Eq)]
pub struct SshPacketKeyExchange<'a> {
    pub cookie: &'a [u8],
    pub kex_algs: &'a [u8],
    pub server_host_key_algs: &'a [u8],
    pub encr_algs_client_to_server: &'a [u8],
    pub encr_algs_server_to_client: &'a [u8],
    pub mac_algs_client_to_server: &'a [u8],
    pub mac_algs_server_to_client: &'a [u8],
    pub comp_algs_client_to_server: &'a [u8],
    pub comp_algs_server_to_client: &'a [u8],
    pub langs_client_to_server: &'a [u8],
    pub langs_server_to_client: &'a [u8],
    pub first_kex_packet_follows: u8,
    pub reserved: u32,
}

const SSH_HASSH_STRING_DELIMITER_SLICE: [u8; 1] = [b';'];

impl SshPacketKeyExchange<'_> {
    pub fn generate_hassh(
        &self, hassh_string: &mut Vec<u8>, hassh: &mut Vec<u8>, to_server: &bool,
    ) {
        let slices = if *to_server {
            [
                self.kex_algs,
                &SSH_HASSH_STRING_DELIMITER_SLICE,
                self.encr_algs_server_to_client,
                &SSH_HASSH_STRING_DELIMITER_SLICE,
                self.mac_algs_server_to_client,
                &SSH_HASSH_STRING_DELIMITER_SLICE,
                self.comp_algs_server_to_client,
            ]
        } else {
            [
                self.kex_algs,
                &SSH_HASSH_STRING_DELIMITER_SLICE,
                self.encr_algs_client_to_server,
                &SSH_HASSH_STRING_DELIMITER_SLICE,
                self.mac_algs_client_to_server,
                &SSH_HASSH_STRING_DELIMITER_SLICE,
                self.comp_algs_client_to_server,
            ]
        };
        // reserving memory
        hassh_string.reserve_exact(slices.iter().fold(0, |acc, x| acc + x.len()));
        // copying slices to hassh string
        slices
            .iter()
            .for_each(|&x| hassh_string.extend_from_slice(x));
        hassh.extend(format!("{:x}", Md5::new().chain(hassh_string).finalize()).as_bytes());
    }
}

#[inline]
fn parse_string(i: &[u8]) -> IResult<&[u8], &[u8]> {
    length_data(be_u32).parse(i)
}

pub fn ssh_parse_key_exchange(i: &[u8]) -> IResult<&[u8], SshPacketKeyExchange<'_>> {
    let (i, cookie) = take(16_usize)(i)?;
    let (i, kex_algs) = parse_string(i)?;
    let (i, server_host_key_algs) = parse_string(i)?;
    let (i, encr_algs_client_to_server) = parse_string(i)?;
    let (i, encr_algs_server_to_client) = parse_string(i)?;
    let (i, mac_algs_client_to_server) = parse_string(i)?;
    let (i, mac_algs_server_to_client) = parse_string(i)?;
    let (i, comp_algs_client_to_server) = parse_string(i)?;
    let (i, comp_algs_server_to_client) = parse_string(i)?;
    let (i, langs_client_to_server) = parse_string(i)?;
    let (i, langs_server_to_client) = parse_string(i)?;
    let (i, first_kex_packet_follows) = be_u8(i)?;
    let (i, reserved) = be_u32(i)?;
    Ok((
        i,
        SshPacketKeyExchange {
            cookie,
            kex_algs,
            server_host_key_algs,
            encr_algs_client_to_server,
            encr_algs_server_to_client,
            mac_algs_client_to_server,
            mac_algs_server_to_client,
            comp_algs_client_to_server,
            comp_algs_server_to_client,
            langs_client_to_server,
            langs_server_to_client,
            first_kex_packet_follows,
            reserved,
        },
    ))
}

#[cfg(test)]
mod tests {

    use super::*;
    use nom8::{Err, Needed};

    /// Simple test of some valid data.
    #[test]
    fn test_ssh_parse_banner() {
        let buf = b"SSH-Single-";
        let result = ssh_parse_banner(buf);
        match result {
            Ok((_, message)) => {
                // Check the first message.
                assert_eq!(message.protover, b"Single");
                assert_eq!(message.swver, b"");
            }
            Err(err) => {
                panic!("Result should not be an error: {:?}.", err);
            }
        }
        let buf2 = b"SSH-2.0-Soft";
        let result2 = ssh_parse_banner(buf2);
        match result2 {
            Ok((_, message)) => {
                // Check the first message.
                assert_eq!(message.protover, b"2.0");
                assert_eq!(message.swver, b"Soft");
            }
            Err(err) => {
                panic!("Result should not be an error: {:?}.", err);
            }
        }
    }

    #[test]
    fn test_parse_line() {
        let buf = b"SSH-Single\n";
        let result = ssh_parse_line(buf);
        match result {
            Ok((_, message)) => {
                // Check the first message.
                assert_eq!(message, b"SSH-Single");
            }
            Err(err) => {
                panic!("Result should not be an error: {:?}.", err);
            }
        }
        let buf2 = b"SSH-Double\r\n";
        let result2 = ssh_parse_line(buf2);
        match result2 {
            Ok((_, message)) => {
                // Check the first message.
                assert_eq!(message, b"SSH-Double");
            }
            Err(err) => {
                panic!("Result should not be an error: {:?}.", err);
            }
        }
        let buf3 = b"SSH-Oops\rMore\r\n";
        let result3 = ssh_parse_line(buf3);
        match result3 {
            Ok((rem, message)) => {
                // Check the first message.
                assert_eq!(message, b"SSH-Oops");
                assert_eq!(rem, b"More\r\n");
            }
            Err(err) => {
                panic!("Result should not be an error: {:?}.", err);
            }
        }
        let buf4 = b"SSH-Miss\r";
        let result4 = ssh_parse_line(buf4);
        match result4 {
            Ok((_, _)) => {
                panic!("Expected incomplete result");
            }
            Err(Err::Incomplete(_)) => {
                //OK
                assert_eq!(1, 1);
            }
            Err(err) => {
                panic!("Result should not be an error: {:?}.", err);
            }
        }
        let buf5 = b"\n";
        let result5 = ssh_parse_line(buf5);
        match result5 {
            Ok((_, message)) => {
                // Check empty line
                assert_eq!(message, b"");
            }
            Err(err) => {
                panic!("Result should not be an error: {:?}.", err);
            }
        }
    }
    #[test]
    fn test_parse_key_exchange() {
        let client_key_exchange = [
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            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        ];
        let cookie = [
            0x18, 0x70, 0xcb, 0xa4, 0xa3, 0xd4, 0xdc, 0x88, 0x6f, 0xfd, 0x76, 0x06, 0xcf, 0x36,
            0x1b, 0xc6,
        ];
        let key_exchange = SshPacketKeyExchange {
            cookie: &cookie,
            kex_algs: b"curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1,ext-info-c",
            server_host_key_algs: b"ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa",
            encr_algs_client_to_server: b"chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com",
            encr_algs_server_to_client: b"chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com",
            mac_algs_client_to_server: b"umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1",
            mac_algs_server_to_client: b"umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1",
            comp_algs_client_to_server: b"none,zlib@openssh.com,zlib",
            comp_algs_server_to_client: b"none,zlib@openssh.com,zlib",
            langs_client_to_server: b"",
            langs_server_to_client: b"",
            first_kex_packet_follows: 0,
            reserved: 0,
        };

        let expected = Ok((b"" as &[u8], key_exchange));
        let res = ssh_parse_key_exchange(&client_key_exchange);
        assert_eq!(res, expected);
    }

    #[test]
    fn test_parse_hassh() {
        let client_key_exchange = [
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            0x2E, 0x63, 0x6F, 0x6D, 0x2C, 0x68, 0x6D, 0x61, 0x63, 0x2D, 0x73, 0x68, 0x61, 0x32,
            0x2D, 0x32, 0x35, 0x36, 0x2C, 0x68, 0x6D, 0x61, 0x63, 0x2D, 0x73, 0x68, 0x61, 0x32,
            0x2D, 0x35, 0x31, 0x32, 0x2C, 0x68, 0x6D, 0x61, 0x63, 0x2D, 0x73, 0x68, 0x61, 0x31,
            0x00, 0x00, 0x00, 0xD5, 0x75, 0x6D, 0x61, 0x63, 0x2D, 0x36, 0x34, 0x2D, 0x65, 0x74,
            0x6D, 0x40, 0x6F, 0x70, 0x65, 0x6E, 0x73, 0x73, 0x68, 0x2E, 0x63, 0x6F, 0x6D, 0x2C,
            0x75, 0x6D, 0x61, 0x63, 0x2D, 0x31, 0x32, 0x38, 0x2D, 0x65, 0x74, 0x6D, 0x40, 0x6F,
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            0x6D, 0x61, 0x63, 0x2D, 0x73, 0x68, 0x61, 0x32, 0x2D, 0x35, 0x31, 0x32, 0x2D, 0x65,
            0x74, 0x6D, 0x40, 0x6F, 0x70, 0x65, 0x6E, 0x73, 0x73, 0x68, 0x2E, 0x63, 0x6F, 0x6D,
            0x2C, 0x68, 0x6D, 0x61, 0x63, 0x2D, 0x73, 0x68, 0x61, 0x31, 0x2D, 0x65, 0x74, 0x6D,
            0x40, 0x6F, 0x70, 0x65, 0x6E, 0x73, 0x73, 0x68, 0x2E, 0x63, 0x6F, 0x6D, 0x2C, 0x75,
            0x6D, 0x61, 0x63, 0x2D, 0x36, 0x34, 0x40, 0x6F, 0x70, 0x65, 0x6E, 0x73, 0x73, 0x68,
            0x2E, 0x63, 0x6F, 0x6D, 0x2C, 0x75, 0x6D, 0x61, 0x63, 0x2D, 0x31, 0x32, 0x38, 0x40,
            0x6F, 0x70, 0x65, 0x6E, 0x73, 0x73, 0x68, 0x2E, 0x63, 0x6F, 0x6D, 0x2C, 0x68, 0x6D,
            0x61, 0x63, 0x2D, 0x73, 0x68, 0x61, 0x32, 0x2D, 0x32, 0x35, 0x36, 0x2C, 0x68, 0x6D,
            0x61, 0x63, 0x2D, 0x73, 0x68, 0x61, 0x32, 0x2D, 0x35, 0x31, 0x32, 0x2C, 0x68, 0x6D,
            0x61, 0x63, 0x2D, 0x73, 0x68, 0x61, 0x31, 0x00, 0x00, 0x00, 0x1A, 0x6E, 0x6F, 0x6E,
            0x65, 0x2C, 0x7A, 0x6C, 0x69, 0x62, 0x40, 0x6F, 0x70, 0x65, 0x6E, 0x73, 0x73, 0x68,
            0x2E, 0x63, 0x6F, 0x6D, 0x2C, 0x7A, 0x6C, 0x69, 0x62, 0x00, 0x00, 0x00, 0x1A, 0x6E,
            0x6F, 0x6E, 0x65, 0x2C, 0x7A, 0x6C, 0x69, 0x62, 0x40, 0x6F, 0x70, 0x65, 0x6E, 0x73,
            0x73, 0x68, 0x2E, 0x63, 0x6F, 0x6D, 0x2C, 0x7A, 0x6C, 0x69, 0x62, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        ];
        let mut hassh_string: Vec<u8> = vec![];
        let mut hassh: Vec<u8> = vec![];
        if let Ok((_, key_exchange)) = ssh_parse_key_exchange(&client_key_exchange) {
            key_exchange.generate_hassh(&mut hassh_string, &mut hassh, &true);
        }

        assert_eq!(hassh_string, "curve25519-sha256,curve25519-sha256@libssh.org,\
                                  ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,\
                                  diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,\
                                  diffie-hellman-group14-sha1,ext-info-c;chacha20-poly1305@openssh.com,aes128-ctr,\
                                  aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com;umac-64-etm@openssh.com,\
                                  umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,\
                                  hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,\
                                  hmac-sha2-256,hmac-sha2-512,hmac-sha1;none,zlib@openssh.com,zlib".as_bytes().to_vec());

        assert_eq!(
            hassh,
            "ec7378c1a92f5a8dde7e8b7a1ddf33d1".as_bytes().to_vec()
        );
    }

    #[test]
    fn test_parse_hassh_server() {
        let server_key_exchange = [
            0x7d, 0x76, 0x4f, 0x78, 0x81, 0x9e, 0x10, 0xfa, 0x23, 0x72, 0xb5, 0x15, 0x56, 0xba,
            0xf9, 0x46, 0x00, 0x00, 0x01, 0x02, 0x63, 0x75, 0x72, 0x76, 0x65, 0x32, 0x35, 0x35,
            0x31, 0x39, 0x2d, 0x73, 0x68, 0x61, 0x32, 0x35, 0x36, 0x2c, 0x63, 0x75, 0x72, 0x76,
            0x65, 0x32, 0x35, 0x35, 0x31, 0x39, 0x2d, 0x73, 0x68, 0x61, 0x32, 0x35, 0x36, 0x40,
            0x6c, 0x69, 0x62, 0x73, 0x73, 0x68, 0x2e, 0x6f, 0x72, 0x67, 0x2c, 0x65, 0x63, 0x64,
            0x68, 0x2d, 0x73, 0x68, 0x61, 0x32, 0x2d, 0x6e, 0x69, 0x73, 0x74, 0x70, 0x32, 0x35,
            0x36, 0x2c, 0x65, 0x63, 0x64, 0x68, 0x2d, 0x73, 0x68, 0x61, 0x32, 0x2d, 0x6e, 0x69,
            0x73, 0x74, 0x70, 0x33, 0x38, 0x34, 0x2c, 0x65, 0x63, 0x64, 0x68, 0x2d, 0x73, 0x68,
            0x61, 0x32, 0x2d, 0x6e, 0x69, 0x73, 0x74, 0x70, 0x35, 0x32, 0x31, 0x2c, 0x64, 0x69,
            0x66, 0x66, 0x69, 0x65, 0x2d, 0x68, 0x65, 0x6c, 0x6c, 0x6d, 0x61, 0x6e, 0x2d, 0x67,
            0x72, 0x6f, 0x75, 0x70, 0x2d, 0x65, 0x78, 0x63, 0x68, 0x61, 0x6e, 0x67, 0x65, 0x2d,
            0x73, 0x68, 0x61, 0x32, 0x35, 0x36, 0x2c, 0x64, 0x69, 0x66, 0x66, 0x69, 0x65, 0x2d,
            0x68, 0x65, 0x6c, 0x6c, 0x6d, 0x61, 0x6e, 0x2d, 0x67, 0x72, 0x6f, 0x75, 0x70, 0x31,
            0x36, 0x2d, 0x73, 0x68, 0x61, 0x35, 0x31, 0x32, 0x2c, 0x64, 0x69, 0x66, 0x66, 0x69,
            0x65, 0x2d, 0x68, 0x65, 0x6c, 0x6c, 0x6d, 0x61, 0x6e, 0x2d, 0x67, 0x72, 0x6f, 0x75,
            0x70, 0x31, 0x38, 0x2d, 0x73, 0x68, 0x61, 0x35, 0x31, 0x32, 0x2c, 0x64, 0x69, 0x66,
            0x66, 0x69, 0x65, 0x2d, 0x68, 0x65, 0x6c, 0x6c, 0x6d, 0x61, 0x6e, 0x2d, 0x67, 0x72,
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            0x2e, 0x63, 0x6f, 0x6d, 0x2c, 0x68, 0x6d, 0x61, 0x63, 0x2d, 0x73, 0x68, 0x61, 0x31,
            0x2d, 0x65, 0x74, 0x6d, 0x40, 0x6f, 0x70, 0x65, 0x6e, 0x73, 0x73, 0x68, 0x2e, 0x63,
            0x6f, 0x6d, 0x2c, 0x75, 0x6d, 0x61, 0x63, 0x2d, 0x36, 0x34, 0x40, 0x6f, 0x70, 0x65,
            0x6e, 0x73, 0x73, 0x68, 0x2e, 0x63, 0x6f, 0x6d, 0x2c, 0x75, 0x6d, 0x61, 0x63, 0x2d,
            0x31, 0x32, 0x38, 0x40, 0x6f, 0x70, 0x65, 0x6e, 0x73, 0x73, 0x68, 0x2e, 0x63, 0x6f,
            0x6d, 0x2c, 0x68, 0x6d, 0x61, 0x63, 0x2d, 0x73, 0x68, 0x61, 0x32, 0x2d, 0x32, 0x35,
            0x36, 0x2c, 0x68, 0x6d, 0x61, 0x63, 0x2d, 0x73, 0x68, 0x61, 0x32, 0x2d, 0x35, 0x31,
            0x32, 0x2c, 0x68, 0x6d, 0x61, 0x63, 0x2d, 0x73, 0x68, 0x61, 0x31, 0x00, 0x00, 0x00,
            0x15, 0x6e, 0x6f, 0x6e, 0x65, 0x2c, 0x7a, 0x6c, 0x69, 0x62, 0x40, 0x6f, 0x70, 0x65,
            0x6e, 0x73, 0x73, 0x68, 0x2e, 0x63, 0x6f, 0x6d, 0x00, 0x00, 0x00, 0x15, 0x6e, 0x6f,
            0x6e, 0x65, 0x2c, 0x7a, 0x6c, 0x69, 0x62, 0x40, 0x6f, 0x70, 0x65, 0x6e, 0x73, 0x73,
            0x68, 0x2e, 0x63, 0x6f, 0x6d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        ];
        let mut hassh_server_string: Vec<u8> = vec![];
        let mut hassh_server: Vec<u8> = vec![];
        if let Ok((_, key_exchange)) = ssh_parse_key_exchange(&server_key_exchange) {
            key_exchange.generate_hassh(&mut hassh_server_string, &mut hassh_server, &true);
        }
        assert_eq!(
            hassh_server,
            "b12d2871a1189eff20364cf5333619ee".as_bytes().to_vec()
        );
    }

    #[test]
    fn test_parse_hassh_server_malicious() {
        let server_key_exchange = [
            0x7d, 0x76, 0x4f, 0x78, 0x81, 0x9e, 0x10, 0xfa, 0x23, 0x72, 0xb5, 0x15, 0x56, 0xba,
            0xf9, 0x46, 0x00, 0x00, 0x01, 0x02, 0x75, 0x72, 0x76, 0x65, 0x32, 0x35, 0x35, 0x31,
            0x39, 0x2d, 0x73, 0x68, 0x61, 0x32, 0x35, 0x36, 0x2c, 0x63, 0x75, 0x72, 0x76, 0x65,
            0x32, 0x35, 0x35, 0x31, 0x39, 0x2d, 0x73, 0x68, 0x61, 0x32, 0x35, 0x36, 0x40, 0x6c,
            0x69, 0x62, 0x73, 0x73, 0x68, 0x2e, 0x6f, 0x72, 0x67, 0x2c, 0x65, 0x63, 0x64, 0x68,
            0x2d, 0x73, 0x68, 0x61, 0x32, 0x2d, 0x6e, 0x69, 0x73, 0x74, 0x70, 0x32, 0x35, 0x36,
            0x2c, 0x65, 0x63, 0x64, 0x68, 0x2d, 0x73, 0x68, 0x61, 0x32, 0x2d, 0x6e, 0x69, 0x73,
            0x74, 0x70, 0x33, 0x38, 0x34, 0x2c, 0x65, 0x63, 0x64, 0x68, 0x2d, 0x73, 0x68, 0x61,
            0x32, 0x2d, 0x6e, 0x69, 0x73, 0x74, 0x70, 0x35, 0x32, 0x31, 0x2c, 0x64, 0x69, 0x66,
            0x66, 0x69, 0x65, 0x2d, 0x68, 0x65, 0x6c, 0x6c, 0x6d, 0x61, 0x6e, 0x2d, 0x67, 0x72,
            0x6f, 0x75, 0x70, 0x2d, 0x65, 0x78, 0x63, 0x68, 0x61, 0x6e, 0x67, 0x65, 0x2d, 0x73,
            0x68, 0x61, 0x32, 0x35, 0x36, 0x2c, 0x64, 0x69, 0x66, 0x66, 0x69, 0x65, 0x2d, 0x68,
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        ];

        if let Err(e) = ssh_parse_key_exchange(&server_key_exchange) {
            assert_eq!(e, Err::Incomplete(Needed::new(15964)));
        } else {
            panic!("ssh_parse_key_exchange() parsed malicious key_exchange");
        }
    }
}

OISF / suricata / 22553492142

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