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refactor

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This commit is contained in:
nora 2024-08-15 16:57:32 +02:00
parent d34db09fd1
commit c0f9687696
11 changed files with 529 additions and 505 deletions
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4
Cargo.lock generated
View file

@ -915,6 +915,10 @@ dependencies = [
"der",
]
[[package]]
name = "ssh"
version = "0.1.0"
[[package]]
name = "ssh-connection"
version = "0.1.0"

2
Cargo.toml
View file

@ -1,5 +1,5 @@
[workspace]
members = ["fakesshd", "ssh-connection", "ssh-protocol", "ssh-transport"]
members = ["fakesshd", "ssh", "ssh-connection", "ssh-protocol", "ssh-transport"]
resolver = "2"
[workspace.dependencies]

3
fakesshd/README.md Normal file
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@ -0,0 +1,3 @@
# fakesshd
An SSH honeypot.

2
fakesshd/src/main.rs
View file

@ -101,7 +101,7 @@ async fn handle_connection(
}
}*/
let mut state = ServerConnection::new(transport::ServerConnection::new(ThreadRngRand));
let mut state = ServerConnection::new(transport::server::ServerConnection::new(ThreadRngRand));
let mut session_channels = HashMap::new();

4
ssh-protocol/src/lib.rs
View file

@ -5,7 +5,7 @@ pub use ssh_transport as transport;
pub use ssh_transport::{Result, SshStatus};
pub struct ServerConnection {
transport: ssh_transport::ServerConnection,
transport: ssh_transport::server::ServerConnection,
state: ServerConnectionState,
}
@ -15,7 +15,7 @@ enum ServerConnectionState {
}
impl ServerConnection {
pub fn new(transport: ssh_transport::ServerConnection) -> Self {
pub fn new(transport: ssh_transport::server::ServerConnection) -> Self {
Self {
transport,
state: ServerConnectionState::Auth(auth::BadAuth::new()),

498
ssh-transport/src/lib.rs
View file

@ -2,15 +2,7 @@ mod crypto;
pub mod numbers;
pub mod packet;
pub mod parse;
use core::str;
use std::{collections::VecDeque, mem::take};
use crypto::{AlgorithmName, AlgorithmNegotiation, EncryptionAlgorithm, HostKeySigningAlgorithm};
use packet::{KeyExchangeEcDhInitPacket, KeyExchangeInitPacket, Packet, PacketTransport};
use parse::{NameList, Parser, Writer};
use sha2::Digest;
use tracing::{debug, info, trace};
pub mod server;
pub use packet::Msg;
@ -37,43 +29,6 @@ impl From<eyre::Report> for SshStatus {
}
}
// This is definitely who we are.
pub const SERVER_IDENTIFICATION: &[u8] = b"SSH-2.0-OpenSSH_9.7\r\n";
pub struct ServerConnection {
state: ServerState,
packet_transport: PacketTransport,
rng: Box<dyn SshRng + Send + Sync>,
plaintext_packets: VecDeque<Packet>,
}
enum ServerState {
ProtoExchange {
received: Vec<u8>,
},
KeyExchangeInit {
client_identification: Vec<u8>,
},
DhKeyInit {
client_identification: Vec<u8>,
client_kexinit: Vec<u8>,
server_kexinit: Vec<u8>,
kex_algorithm: crypto::KexAlgorithm,
server_host_key_algorithm: HostKeySigningAlgorithm,
encryption_client_to_server: EncryptionAlgorithm,
encryption_server_to_client: EncryptionAlgorithm,
},
NewKeys {
h: [u8; 32],
k: Vec<u8>,
encryption_client_to_server: EncryptionAlgorithm,
encryption_server_to_client: EncryptionAlgorithm,
},
ServiceRequest,
Open,
}
pub trait SshRng {
fn fill_bytes(&mut self, dest: &mut [u8]);
}
@ -98,460 +53,9 @@ impl rand_core::RngCore for SshRngRandAdapter<'_> {
}
}
impl ServerConnection {
pub fn new(rng: impl SshRng + Send + Sync + 'static) -> Self {
Self {
state: ServerState::ProtoExchange {
received: Vec::new(),
},
packet_transport: PacketTransport::new(),
rng: Box::new(rng),
plaintext_packets: VecDeque::new(),
}
}
}
impl ServerConnection {
pub fn recv_bytes(&mut self, bytes: &[u8]) -> Result<()> {
if let ServerState::ProtoExchange { received } = &mut self.state {
received.extend_from_slice(bytes);
if received.windows(2).any(|win| win == b"\r\n") {
// TODO: care that its SSH 2.0 instead of anythin anything else
// The client will not send any more information than this until we respond, so discord the rest of the bytes.
let client_identification = received.to_owned();
let client_ident_string = String::from_utf8_lossy(&client_identification);
debug!(identification = %client_ident_string, "Client identifier");
self.packet_transport.queue_send_protocol_info();
self.state = ServerState::KeyExchangeInit {
client_identification,
};
}
// This means that we must be called at least twice, which is fine I think.
return Ok(());
}
self.packet_transport.recv_bytes(bytes)?;
while let Some(packet) = self.packet_transport.recv_next_packet() {
let packet_type = packet.payload.get(0).unwrap_or(&0xFF);
let packet_type_string =
numbers::packet_type_to_string(*packet_type).unwrap_or("<unknown>");
trace!(%packet_type, %packet_type_string, packet_len = %packet.payload.len(), "Received packet");
// Handle some packets ignoring the state.
match packet.payload.get(0).copied() {
Some(numbers::SSH_MSG_DISCONNECT) => {
// <https://datatracker.ietf.org/doc/html/rfc4253#section-11.1>
let mut disconnect = Parser::new(&packet.payload[1..]);
let reason = disconnect.u32()?;
let description = disconnect.utf8_string()?;
let _language_tag = disconnect.utf8_string()?;
let reason_string =
numbers::disconnect_reason_to_string(reason).unwrap_or("<unknown>");
info!(%reason, %reason_string, %description, "Client disconnecting");
return Err(SshStatus::Disconnect);
}
_ => {}
}
match &mut self.state {
ServerState::ProtoExchange { .. } => unreachable!("handled above"),
ServerState::KeyExchangeInit {
client_identification,
} => {
let kex = KeyExchangeInitPacket::parse(&packet.payload)?;
let require_algorithm =
|expected: &'static str, list: NameList<'_>| -> Result<&'static str> {
if list.iter().any(|alg| alg == expected) {
Ok(expected)
} else {
Err(client_error!(
"client does not support algorithm {expected}. supported: {list:?}",
))
}
};
let kex_algorithms = AlgorithmNegotiation {
supported: vec![
crypto::KEX_CURVE_25519_SHA256,
crypto::KEX_ECDH_SHA2_NISTP256,
],
};
let kex_algorithm = kex_algorithms.find(kex.kex_algorithms.0)?;
debug!(name = %kex_algorithm.name(), "Using KEX algorithm");
let hostkey_algorithms = AlgorithmNegotiation {
supported: vec![
crypto::hostkey_ed25519(ED25519_PRIVKEY_BYTES.to_vec()),
crypto::hostkey_ecdsa_sha2_p256(ECDSA_P256_PRIVKEY_BYTES.to_vec()),
],
};
let server_host_key_algorithm =
hostkey_algorithms.find(kex.server_host_key_algorithms.0)?;
debug!(name = %server_host_key_algorithm.name(), "Using host key algorithm");
// TODO: Implement aes128-ctr
let _ = crypto::encrypt::ENC_AES128_CTR;
let encryption_algorithms_client_to_server = AlgorithmNegotiation {
supported: vec![
crypto::encrypt::CHACHA20POLY1305,
crypto::encrypt::AES256_GCM,
],
};
let encryption_algorithms_server_to_client = AlgorithmNegotiation {
supported: vec![
crypto::encrypt::CHACHA20POLY1305,
crypto::encrypt::AES256_GCM,
],
};
let encryption_client_to_server = encryption_algorithms_client_to_server
.find(kex.encryption_algorithms_client_to_server.0)?;
debug!(name = %encryption_client_to_server.name(), "Using encryption algorithm C->S");
let encryption_server_to_client = encryption_algorithms_server_to_client
.find(kex.encryption_algorithms_server_to_client.0)?;
debug!(name = %encryption_server_to_client.name(), "Using encryption algorithm S->C");
let mac_algorithm_client_to_server =
require_algorithm("hmac-sha2-256", kex.mac_algorithms_client_to_server)?;
let mac_algorithm_server_to_client =
require_algorithm("hmac-sha2-256", kex.mac_algorithms_server_to_client)?;
let compression_algorithm_client_to_server =
require_algorithm("none", kex.compression_algorithms_client_to_server)?;
let compression_algorithm_server_to_client =
require_algorithm("none", kex.compression_algorithms_server_to_client)?;
let _ = kex.languages_client_to_server;
let _ = kex.languages_server_to_client;
if kex.first_kex_packet_follows {
return Err(client_error!(
"the client wants to send a guessed packet, that's annoying :("
));
}
let mut cookie = [0; 16];
self.rng.fill_bytes(&mut cookie);
let server_kexinit = KeyExchangeInitPacket {
cookie,
kex_algorithms: NameList::one(kex_algorithm.name()),
server_host_key_algorithms: NameList::one(server_host_key_algorithm.name()),
encryption_algorithms_client_to_server: NameList::one(
encryption_client_to_server.name(),
),
encryption_algorithms_server_to_client: NameList::one(
encryption_server_to_client.name(),
),
mac_algorithms_client_to_server: NameList::one(
mac_algorithm_client_to_server,
),
mac_algorithms_server_to_client: NameList::one(
mac_algorithm_server_to_client,
),
compression_algorithms_client_to_server: NameList::one(
compression_algorithm_client_to_server,
),
compression_algorithms_server_to_client: NameList::one(
compression_algorithm_server_to_client,
),
languages_client_to_server: NameList::none(),
languages_server_to_client: NameList::none(),
first_kex_packet_follows: false,
};
let client_identification = take(client_identification);
let server_kexinit_payload = server_kexinit.to_bytes();
self.packet_transport.queue_packet(Packet {
payload: server_kexinit_payload.clone(),
});
self.state = ServerState::DhKeyInit {
client_identification,
client_kexinit: packet.payload,
server_kexinit: server_kexinit_payload,
kex_algorithm,
server_host_key_algorithm,
encryption_client_to_server,
encryption_server_to_client,
};
}
ServerState::DhKeyInit {
client_identification,
client_kexinit,
server_kexinit,
kex_algorithm,
server_host_key_algorithm,
encryption_client_to_server,
encryption_server_to_client,
} => {
let dh = KeyExchangeEcDhInitPacket::parse(&packet.payload)?;
let client_public_key = dh.qc;
let crypto::KexAlgorithmOutput {
server_public_key,
shared_secret,
} = (kex_algorithm.exchange)(client_public_key, &mut *self.rng)?;
let pub_hostkey = server_host_key_algorithm.public_key();
let mut hash = sha2::Sha256::new();
let add_hash = |hash: &mut sha2::Sha256, bytes: &[u8]| {
hash.update(bytes);
};
let hash_string = |hash: &mut sha2::Sha256, bytes: &[u8]| {
add_hash(hash, &u32::to_be_bytes(bytes.len() as u32));
add_hash(hash, bytes);
};
let hash_mpint = |hash: &mut sha2::Sha256, bytes: &[u8]| {
crypto::encode_mpint_for_hash(bytes, |data| add_hash(hash, data));
};
hash_string(
&mut hash,
&client_identification[..(client_identification.len() - 2)],
); // V_C
hash_string(
&mut hash,
&SERVER_IDENTIFICATION[..(SERVER_IDENTIFICATION.len() - 2)],
); // V_S
hash_string(&mut hash, client_kexinit); // I_C
hash_string(&mut hash, server_kexinit); // I_S
hash_string(&mut hash, &pub_hostkey.0); // K_S
// For normal DH as in RFC4253, e and f are mpints.
// But for ECDH as defined in RFC5656, Q_C and Q_S are strings.
// <https://datatracker.ietf.org/doc/html/rfc5656#section-4>
hash_string(&mut hash, client_public_key); // Q_C
hash_string(&mut hash, &server_public_key); // Q_S
hash_mpint(&mut hash, &shared_secret); // K
let hash = hash.finalize();
let signature = server_host_key_algorithm.sign(&hash);
// eprintln!("client_public_key: {:x?}", client_public_key.0);
// eprintln!("server_public_key: {:x?}", server_public_key.as_bytes());
// eprintln!("shared_secret: {:x?}", shared_secret.as_bytes());
// eprintln!("hash: {:x?}", hash);
let packet = Packet::new_msg_kex_ecdh_reply(
&pub_hostkey.0,
&server_public_key,
&signature.0,
);
self.packet_transport.queue_packet(packet);
self.state = ServerState::NewKeys {
h: hash.into(),
k: shared_secret,
encryption_client_to_server: *encryption_client_to_server,
encryption_server_to_client: *encryption_server_to_client,
};
}
ServerState::NewKeys {
h,
k,
encryption_client_to_server,
encryption_server_to_client,
} => {
if packet.payload != [numbers::SSH_MSG_NEWKEYS] {
return Err(client_error!("did not send SSH_MSG_NEWKEYS"));
}
self.packet_transport.queue_packet(Packet {
payload: vec![numbers::SSH_MSG_NEWKEYS],
});
self.packet_transport.set_key(
*h,
k,
*encryption_client_to_server,
*encryption_server_to_client,
);
self.state = ServerState::ServiceRequest {};
}
ServerState::ServiceRequest => {
// TODO: this should probably move out of here? unsure.
if packet.payload.first() != Some(&numbers::SSH_MSG_SERVICE_REQUEST) {
return Err(client_error!("did not send SSH_MSG_SERVICE_REQUEST"));
}
let mut p = Parser::new(&packet.payload[1..]);
let service = p.utf8_string()?;
debug!(%service, "Client requesting service");
if service != "ssh-userauth" {
return Err(client_error!("only supports ssh-userauth"));
}
self.packet_transport.queue_packet(Packet {
payload: {
let mut writer = Writer::new();
writer.u8(numbers::SSH_MSG_SERVICE_ACCEPT);
writer.string(service.as_bytes());
writer.finish()
},
});
self.state = ServerState::Open;
}
ServerState::Open => {
self.plaintext_packets.push_back(packet);
}
}
}
Ok(())
}
pub fn next_msg_to_send(&mut self) -> Option<Msg> {
self.packet_transport.next_msg_to_send()
}
pub fn next_plaintext_packet(&mut self) -> Option<Packet> {
self.plaintext_packets.pop_front()
}
pub fn send_plaintext_packet(&mut self, packet: Packet) {
self.packet_transport.queue_packet(packet);
}
}
/// Manually extracted from the key using <https://peterlyons.com/problog/2017/12/openssh-ed25519-private-key-file-format/>, probably wrong
/// ```text
/// ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOk5zfpvwNc3MztTTpE90zLI1Ref4AwwRVdSFyJLGbj2 testkey
/// ```
/// ```text
/// -----BEGIN OPENSSH PRIVATE KEY-----
/// b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
/// QyNTUxOQAAACDpOc36b8DXNzM7U06RPdMyyNUXn+AMMEVXUhciSxm49gAAAJDpgLSk6YC0
/// pAAAAAtzc2gtZWQyNTUxOQAAACDpOc36b8DXNzM7U06RPdMyyNUXn+AMMEVXUhciSxm49g
/// AAAECSeskxuEtJrr9L7ZkbpogXC5pKRNVHx1ueMX2h1XUnmek5zfpvwNc3MztTTpE90zLI
/// 1Ref4AwwRVdSFyJLGbj2AAAAB3Rlc3RrZXkBAgMEBQY=
/// -----END OPENSSH PRIVATE KEY-----
/// ```
const ED25519_PRIVKEY_BYTES: &[u8; 32] = &[
0x92, 0x7a, 0xc9, 0x31, 0xb8, 0x4b, 0x49, 0xae, 0xbf, 0x4b, 0xed, 0x99, 0x1b, 0xa6, 0x88, 0x17,
0x0b, 0x9a, 0x4a, 0x44, 0xd5, 0x47, 0xc7, 0x5b, 0x9e, 0x31, 0x7d, 0xa1, 0xd5, 0x75, 0x27, 0x99,
];
const ECDSA_P256_PRIVKEY_BYTES: &[u8; 32] = &[
0x89, 0xdd, 0x0c, 0x96, 0x22, 0x85, 0x10, 0xec, 0x3c, 0xa4, 0xa1, 0xb8, 0xac, 0x2a, 0x77, 0xa8,
0xd4, 0x4d, 0xcb, 0x9d, 0x90, 0x25, 0xc6, 0xd8, 0x3a, 0x02, 0x74, 0x4f, 0x9e, 0x44, 0xcd, 0xa3,
];
#[macro_export]
macro_rules! client_error {
($($tt:tt)*) => {
$crate::SshStatus::ClientError(::std::format!($($tt)*))
};
}
#[cfg(test)]
mod tests {
use hex_literal::hex;
use crate::{packet::MsgKind, ServerConnection, SshRng};
struct NoRng;
impl SshRng for NoRng {
fn fill_bytes(&mut self, _: &mut [u8]) {
unreachable!()
}
}
struct HardcodedRng(Vec<u8>);
impl SshRng for HardcodedRng {
fn fill_bytes(&mut self, dest: &mut [u8]) {
dest.copy_from_slice(&self.0[..dest.len()]);
self.0.splice(0..dest.len(), []);
}
}
#[test]
fn protocol_exchange() {
let mut con = ServerConnection::new(NoRng);
con.recv_bytes(b"SSH-2.0-OpenSSH_9.7\r\n").unwrap();
let msg = con.next_msg_to_send().unwrap();
assert_eq!(msg.0, MsgKind::ServerProtocolInfo);
}
#[test]
fn protocol_exchange_slow_client() {
let mut con = ServerConnection::new(NoRng);
con.recv_bytes(b"SSH-2.0-").unwrap();
con.recv_bytes(b"OpenSSH_9.7\r\n").unwrap();
let msg = con.next_msg_to_send().unwrap();
assert_eq!(msg.0, MsgKind::ServerProtocolInfo);
}
#[test]
fn handshake() {
#[rustfmt::skip]
let rng = vec![
0x14, 0xa2, 0x04, 0xa5, 0x4b, 0x2f, 0x5f, 0xa7, 0xff, 0x53, 0x13, 0x67, 0x57, 0x67, 0xbc,
0x55, 0x3f, 0xc0, 0x6c, 0x0d, 0x07, 0x8f, 0xe2, 0x75, 0x95, 0x18, 0x4b, 0xd2, 0xcb, 0xd0,
0x64, 0x06, 0x14, 0xa2, 0x04, 0xa5, 0x4b, 0x2f, 0x5f, 0xa7, 0xff, 0x53, 0x13, 0x67, 0x57,
0x67, 0xbc, 0x55, 0x3f, 0xc0, 0x6c, 0x0d, 0x07, 0x8f, 0xe2, 0x75, 0x95, 0x18, 0x4b, 0xd2,
0xcb, 0xd0, 0x64, 0x06, 0x67, 0xbc, 0x55, 0x3f, 0xc0, 0x6c, 0x0d, 0x07, 0x8f, 0xe2, 0x75,
0x95, 0x18, 0x4b, 0xd2, 0xcb, 0xd0, 0x64, 0x06,
];
struct Part {
client: &'static [u8],
server: &'static [u8],
}
// Extracted from a real OpenSSH client using this server (with hardcoded creds) using Wireshark.
let conversation = [
Part {
client: &hex!("5353482d322e302d4f70656e5353485f392e370d0a"),
server: &hex!("5353482d322e302d4f70656e5353485f392e370d0a"),
},
// KEX Init
Part {
client: &hex!(
"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"
),
server: &hex!(
"000000bc051414a204a54b2f5fa7ff5313675767bc5500000011637572766532353531392d7368613235360000000b7373682d656432353531390000001d63686163686132302d706f6c7931333035406f70656e7373682e636f6d0000001d63686163686132302d706f6c7931333035406f70656e7373682e636f6d0000000d686d61632d736861322d3235360000000d686d61632d736861322d323536000000046e6f6e65000000046e6f6e65000000000000000000000000000000000000"
),
},
// ECDH KEX Init
Part {
client: &hex!(
"0000002c061e000000204c646d1281abf23264d63db96e05c0223cfead668d9d38c62579b8856e67ae19000000000000"
),
server: &hex!(
"000000bc081f000000330000000b7373682d6564323535313900000020e939cdfa6fc0d737333b534e913dd332c8d5179fe00c3045575217224b19b8f6000000204260e2c5e5383f1a021c9631fa61f60f305b29183fd219d4c8207c664e063410000000530000000b7373682d65643235353139000000406504a045499f26aa4ee17606ea6bd9e3f288838591f25d8604a63f77a52f5b9e909c00d10f386553e585d86ab329bbde0fca5c64b1b1982d7adcac17cf7f06010000000000000000"
),
},
// New Keys
Part {
client: &hex!("0000000c0a1500000000000000000000"),
server: &hex!("0000000c0a1500000000000000000000"),
},
// Service Request (encrypted)
Part {
client: &hex!("09ca4db7baeb24836a1f7d22368055bf4c26981ed86738ac7a5c31d0730ad656f1967853781dff91ee1c4de8"),
server: &hex!("7b444c0d5faf740d350701a054ea469fab1c98e4b669e4872a454163edb42ec5e4fa95c404ab601f016bd259"),
},
];
let mut con = ServerConnection::new(HardcodedRng(rng));
for part in conversation {
con.recv_bytes(&part.client).unwrap();
eprintln!("client: {:x?}", part.client);
let bytes = con.next_msg_to_send().unwrap().to_bytes();
if part.server != bytes {
panic!(
"expected != found\nexpected: {:x?}\nfound: {:x?}",
part.server, bytes
);
}
}
}
}

8
ssh-transport/src/packet.rs
View file

@ -24,7 +24,7 @@ pub struct Msg(pub(crate) MsgKind);
#[derive(Debug, PartialEq)]
pub(crate) enum MsgKind {
ServerProtocolInfo,
ServerProtocolInfo(Vec<u8>),
PlaintextPacket(Packet),
EncryptedPacket(EncryptedPacket),
}
@ -32,7 +32,7 @@ pub(crate) enum MsgKind {
impl Msg {
pub fn to_bytes(self) -> Vec<u8> {
match self.0 {
MsgKind::ServerProtocolInfo => crate::SERVER_IDENTIFICATION.to_vec(),
MsgKind::ServerProtocolInfo(v) => v,
MsgKind::PlaintextPacket(v) => v.to_bytes(true, Packet::DEFAULT_BLOCK_SIZE),
MsgKind::EncryptedPacket(v) => v.into_bytes(),
}
@ -85,8 +85,8 @@ impl PacketTransport {
self.queue_send_msg(msg);
}
pub(crate) fn queue_send_protocol_info(&mut self) {
self.queue_send_msg(Msg(MsgKind::ServerProtocolInfo));
pub(crate) fn queue_send_protocol_info(&mut self, identification: Vec<u8>) {
self.queue_send_msg(Msg(MsgKind::ServerProtocolInfo(identification)));
}
pub(crate) fn recv_next_packet(&mut self) -> Option<Packet> {

501
ssh-transport/src/server.rs Normal file
View file

@ -0,0 +1,501 @@
use core::str;
use std::{collections::VecDeque, mem::take};
use crate::crypto::{
self, AlgorithmName, AlgorithmNegotiation, EncryptionAlgorithm, HostKeySigningAlgorithm,
};
use crate::packet::{KeyExchangeEcDhInitPacket, KeyExchangeInitPacket, Packet, PacketTransport};
use crate::parse::{NameList, Parser, Writer};
use crate::{client_error, Msg, SshRng, SshStatus};
use crate::{numbers, Result};
use sha2::Digest;
use tracing::{debug, info, trace};
// This is definitely who we are.
pub const SERVER_IDENTIFICATION: &[u8] = b"SSH-2.0-OpenSSH_9.7\r\n";
pub struct ServerConnection {
state: ServerState,
packet_transport: PacketTransport,
rng: Box<dyn SshRng + Send + Sync>,
plaintext_packets: VecDeque<Packet>,
}
enum ServerState {
ProtoExchange {
received: Vec<u8>,
},
KeyExchangeInit {
client_identification: Vec<u8>,
},
DhKeyInit {
client_identification: Vec<u8>,
client_kexinit: Vec<u8>,
server_kexinit: Vec<u8>,
kex_algorithm: crypto::KexAlgorithm,
server_host_key_algorithm: HostKeySigningAlgorithm,
encryption_client_to_server: EncryptionAlgorithm,
encryption_server_to_client: EncryptionAlgorithm,
},
NewKeys {
h: [u8; 32],
k: Vec<u8>,
encryption_client_to_server: EncryptionAlgorithm,
encryption_server_to_client: EncryptionAlgorithm,
},
ServiceRequest,
Open,
}
impl ServerConnection {
pub fn new(rng: impl SshRng + Send + Sync + 'static) -> Self {
Self {
state: ServerState::ProtoExchange {
received: Vec::new(),
},
packet_transport: PacketTransport::new(),
rng: Box::new(rng),
plaintext_packets: VecDeque::new(),
}
}
}
impl ServerConnection {
pub fn recv_bytes(&mut self, bytes: &[u8]) -> Result<()> {
if let ServerState::ProtoExchange { received } = &mut self.state {
received.extend_from_slice(bytes);
if received.windows(2).any(|win| win == b"\r\n") {
// TODO: care that its SSH 2.0 instead of anythin anything else
// The client will not send any more information than this until we respond, so discord the rest of the bytes.
let client_identification = received.to_owned();
let client_ident_string = String::from_utf8_lossy(&client_identification);
debug!(identification = %client_ident_string, "Client identifier");
self.packet_transport
.queue_send_protocol_info(SERVER_IDENTIFICATION.to_vec());
self.state = ServerState::KeyExchangeInit {
client_identification,
};
}
// This means that we must be called at least twice, which is fine I think.
return Ok(());
}
self.packet_transport.recv_bytes(bytes)?;
while let Some(packet) = self.packet_transport.recv_next_packet() {
let packet_type = packet.payload.get(0).unwrap_or(&0xFF);
let packet_type_string =
numbers::packet_type_to_string(*packet_type).unwrap_or("<unknown>");
trace!(%packet_type, %packet_type_string, packet_len = %packet.payload.len(), "Received packet");
// Handle some packets ignoring the state.
match packet.payload.get(0).copied() {
Some(numbers::SSH_MSG_DISCONNECT) => {
// <https://datatracker.ietf.org/doc/html/rfc4253#section-11.1>
let mut disconnect = Parser::new(&packet.payload[1..]);
let reason = disconnect.u32()?;
let description = disconnect.utf8_string()?;
let _language_tag = disconnect.utf8_string()?;
let reason_string =
numbers::disconnect_reason_to_string(reason).unwrap_or("<unknown>");
info!(%reason, %reason_string, %description, "Client disconnecting");
return Err(SshStatus::Disconnect);
}
_ => {}
}
match &mut self.state {
ServerState::ProtoExchange { .. } => unreachable!("handled above"),
ServerState::KeyExchangeInit {
client_identification,
} => {
let kex = KeyExchangeInitPacket::parse(&packet.payload)?;
let require_algorithm =
|expected: &'static str, list: NameList<'_>| -> Result<&'static str> {
if list.iter().any(|alg| alg == expected) {
Ok(expected)
} else {
Err(client_error!(
"client does not support algorithm {expected}. supported: {list:?}",
))
}
};
let kex_algorithms = AlgorithmNegotiation {
supported: vec![
crypto::KEX_CURVE_25519_SHA256,
crypto::KEX_ECDH_SHA2_NISTP256,
],
};
let kex_algorithm = kex_algorithms.find(kex.kex_algorithms.0)?;
debug!(name = %kex_algorithm.name(), "Using KEX algorithm");
let hostkey_algorithms = AlgorithmNegotiation {
supported: vec![
crypto::hostkey_ed25519(ED25519_PRIVKEY_BYTES.to_vec()),
crypto::hostkey_ecdsa_sha2_p256(ECDSA_P256_PRIVKEY_BYTES.to_vec()),
],
};
let server_host_key_algorithm =
hostkey_algorithms.find(kex.server_host_key_algorithms.0)?;
debug!(name = %server_host_key_algorithm.name(), "Using host key algorithm");
// TODO: Implement aes128-ctr
let _ = crypto::encrypt::ENC_AES128_CTR;
let encryption_algorithms_client_to_server = AlgorithmNegotiation {
supported: vec![
crypto::encrypt::CHACHA20POLY1305,
crypto::encrypt::AES256_GCM,
],
};
let encryption_algorithms_server_to_client = AlgorithmNegotiation {
supported: vec![
crypto::encrypt::CHACHA20POLY1305,
crypto::encrypt::AES256_GCM,
],
};
let encryption_client_to_server = encryption_algorithms_client_to_server
.find(kex.encryption_algorithms_client_to_server.0)?;
debug!(name = %encryption_client_to_server.name(), "Using encryption algorithm C->S");
let encryption_server_to_client = encryption_algorithms_server_to_client
.find(kex.encryption_algorithms_server_to_client.0)?;
debug!(name = %encryption_server_to_client.name(), "Using encryption algorithm S->C");
let mac_algorithm_client_to_server =
require_algorithm("hmac-sha2-256", kex.mac_algorithms_client_to_server)?;
let mac_algorithm_server_to_client =
require_algorithm("hmac-sha2-256", kex.mac_algorithms_server_to_client)?;
let compression_algorithm_client_to_server =
require_algorithm("none", kex.compression_algorithms_client_to_server)?;
let compression_algorithm_server_to_client =
require_algorithm("none", kex.compression_algorithms_server_to_client)?;
let _ = kex.languages_client_to_server;
let _ = kex.languages_server_to_client;
if kex.first_kex_packet_follows {
return Err(client_error!(
"the client wants to send a guessed packet, that's annoying :("
));
}
let mut cookie = [0; 16];
self.rng.fill_bytes(&mut cookie);
let server_kexinit = KeyExchangeInitPacket {
cookie,
kex_algorithms: NameList::one(kex_algorithm.name()),
server_host_key_algorithms: NameList::one(server_host_key_algorithm.name()),
encryption_algorithms_client_to_server: NameList::one(
encryption_client_to_server.name(),
),
encryption_algorithms_server_to_client: NameList::one(
encryption_server_to_client.name(),
),
mac_algorithms_client_to_server: NameList::one(
mac_algorithm_client_to_server,
),
mac_algorithms_server_to_client: NameList::one(
mac_algorithm_server_to_client,
),
compression_algorithms_client_to_server: NameList::one(
compression_algorithm_client_to_server,
),
compression_algorithms_server_to_client: NameList::one(
compression_algorithm_server_to_client,
),
languages_client_to_server: NameList::none(),
languages_server_to_client: NameList::none(),
first_kex_packet_follows: false,
};
let client_identification = take(client_identification);
let server_kexinit_payload = server_kexinit.to_bytes();
self.packet_transport.queue_packet(Packet {
payload: server_kexinit_payload.clone(),
});
self.state = ServerState::DhKeyInit {
client_identification,
client_kexinit: packet.payload,
server_kexinit: server_kexinit_payload,
kex_algorithm,
server_host_key_algorithm,
encryption_client_to_server,
encryption_server_to_client,
};
}
ServerState::DhKeyInit {
client_identification,
client_kexinit,
server_kexinit,
kex_algorithm,
server_host_key_algorithm,
encryption_client_to_server,
encryption_server_to_client,
} => {
let dh = KeyExchangeEcDhInitPacket::parse(&packet.payload)?;
let client_public_key = dh.qc;
let crypto::KexAlgorithmOutput {
server_public_key,
shared_secret,
} = (kex_algorithm.exchange)(client_public_key, &mut *self.rng)?;
let pub_hostkey = server_host_key_algorithm.public_key();
let mut hash = sha2::Sha256::new();
let add_hash = |hash: &mut sha2::Sha256, bytes: &[u8]| {
hash.update(bytes);
};
let hash_string = |hash: &mut sha2::Sha256, bytes: &[u8]| {
add_hash(hash, &u32::to_be_bytes(bytes.len() as u32));
add_hash(hash, bytes);
};
let hash_mpint = |hash: &mut sha2::Sha256, bytes: &[u8]| {
crypto::encode_mpint_for_hash(bytes, |data| add_hash(hash, data));
};
hash_string(
&mut hash,
&client_identification[..(client_identification.len() - 2)],
); // V_C
hash_string(
&mut hash,
&SERVER_IDENTIFICATION[..(SERVER_IDENTIFICATION.len() - 2)],
); // V_S
hash_string(&mut hash, client_kexinit); // I_C
hash_string(&mut hash, server_kexinit); // I_S
hash_string(&mut hash, &pub_hostkey.0); // K_S
// For normal DH as in RFC4253, e and f are mpints.
// But for ECDH as defined in RFC5656, Q_C and Q_S are strings.
// <https://datatracker.ietf.org/doc/html/rfc5656#section-4>
hash_string(&mut hash, client_public_key); // Q_C
hash_string(&mut hash, &server_public_key); // Q_S
hash_mpint(&mut hash, &shared_secret); // K
let hash = hash.finalize();
let signature = server_host_key_algorithm.sign(&hash);
// eprintln!("client_public_key: {:x?}", client_public_key.0);
// eprintln!("server_public_key: {:x?}", server_public_key.as_bytes());
// eprintln!("shared_secret: {:x?}", shared_secret.as_bytes());
// eprintln!("hash: {:x?}", hash);
let packet = Packet::new_msg_kex_ecdh_reply(
&pub_hostkey.0,
&server_public_key,
&signature.0,
);
self.packet_transport.queue_packet(packet);
self.state = ServerState::NewKeys {
h: hash.into(),
k: shared_secret,
encryption_client_to_server: *encryption_client_to_server,
encryption_server_to_client: *encryption_server_to_client,
};
}
ServerState::NewKeys {
h,
k,
encryption_client_to_server,
encryption_server_to_client,
} => {
if packet.payload != [numbers::SSH_MSG_NEWKEYS] {
return Err(client_error!("did not send SSH_MSG_NEWKEYS"));
}
self.packet_transport.queue_packet(Packet {
payload: vec![numbers::SSH_MSG_NEWKEYS],
});
self.packet_transport.set_key(
*h,
k,
*encryption_client_to_server,
*encryption_server_to_client,
);
self.state = ServerState::ServiceRequest {};
}
ServerState::ServiceRequest => {
// TODO: this should probably move out of here? unsure.
if packet.payload.first() != Some(&numbers::SSH_MSG_SERVICE_REQUEST) {
return Err(client_error!("did not send SSH_MSG_SERVICE_REQUEST"));
}
let mut p = Parser::new(&packet.payload[1..]);
let service = p.utf8_string()?;
debug!(%service, "Client requesting service");
if service != "ssh-userauth" {
return Err(client_error!("only supports ssh-userauth"));
}
self.packet_transport.queue_packet(Packet {
payload: {
let mut writer = Writer::new();
writer.u8(numbers::SSH_MSG_SERVICE_ACCEPT);
writer.string(service.as_bytes());
writer.finish()
},
});
self.state = ServerState::Open;
}
ServerState::Open => {
self.plaintext_packets.push_back(packet);
}
}
}
Ok(())
}
pub fn next_msg_to_send(&mut self) -> Option<Msg> {
self.packet_transport.next_msg_to_send()
}
pub fn next_plaintext_packet(&mut self) -> Option<Packet> {
self.plaintext_packets.pop_front()
}
pub fn send_plaintext_packet(&mut self, packet: Packet) {
self.packet_transport.queue_packet(packet);
}
}
/// Manually extracted from the key using <https://peterlyons.com/problog/2017/12/openssh-ed25519-private-key-file-format/>, probably wrong
/// ```text
/// ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOk5zfpvwNc3MztTTpE90zLI1Ref4AwwRVdSFyJLGbj2 testkey
/// ```
/// ```text
/// -----BEGIN OPENSSH PRIVATE KEY-----
/// b3BlbnNzaC1rZXktdjEAAAAABG5vbmUAAAAEbm9uZQAAAAAAAAABAAAAMwAAAAtzc2gtZW
/// QyNTUxOQAAACDpOc36b8DXNzM7U06RPdMyyNUXn+AMMEVXUhciSxm49gAAAJDpgLSk6YC0
/// pAAAAAtzc2gtZWQyNTUxOQAAACDpOc36b8DXNzM7U06RPdMyyNUXn+AMMEVXUhciSxm49g
/// AAAECSeskxuEtJrr9L7ZkbpogXC5pKRNVHx1ueMX2h1XUnmek5zfpvwNc3MztTTpE90zLI
/// 1Ref4AwwRVdSFyJLGbj2AAAAB3Rlc3RrZXkBAgMEBQY=
/// -----END OPENSSH PRIVATE KEY-----
/// ```
const ED25519_PRIVKEY_BYTES: &[u8; 32] = &[
0x92, 0x7a, 0xc9, 0x31, 0xb8, 0x4b, 0x49, 0xae, 0xbf, 0x4b, 0xed, 0x99, 0x1b, 0xa6, 0x88, 0x17,
0x0b, 0x9a, 0x4a, 0x44, 0xd5, 0x47, 0xc7, 0x5b, 0x9e, 0x31, 0x7d, 0xa1, 0xd5, 0x75, 0x27, 0x99,
];
const ECDSA_P256_PRIVKEY_BYTES: &[u8; 32] = &[
0x89, 0xdd, 0x0c, 0x96, 0x22, 0x85, 0x10, 0xec, 0x3c, 0xa4, 0xa1, 0xb8, 0xac, 0x2a, 0x77, 0xa8,
0xd4, 0x4d, 0xcb, 0x9d, 0x90, 0x25, 0xc6, 0xd8, 0x3a, 0x02, 0x74, 0x4f, 0x9e, 0x44, 0xcd, 0xa3,
];
#[cfg(test)]
mod tests {
use hex_literal::hex;
use crate::{packet::MsgKind, server::ServerConnection, SshRng};
struct NoRng;
impl SshRng for NoRng {
fn fill_bytes(&mut self, _: &mut [u8]) {
unreachable!()
}
}
struct HardcodedRng(Vec<u8>);
impl SshRng for HardcodedRng {
fn fill_bytes(&mut self, dest: &mut [u8]) {
dest.copy_from_slice(&self.0[..dest.len()]);
self.0.splice(0..dest.len(), []);
}
}
#[test]
fn protocol_exchange() {
let mut con = ServerConnection::new(NoRng);
con.recv_bytes(b"SSH-2.0-OpenSSH_9.7\r\n").unwrap();
let msg = con.next_msg_to_send().unwrap();
assert!(matches!(msg.0, MsgKind::ServerProtocolInfo(_)));
}
#[test]
fn protocol_exchange_slow_client() {
let mut con = ServerConnection::new(NoRng);
con.recv_bytes(b"SSH-2.0-").unwrap();
con.recv_bytes(b"OpenSSH_9.7\r\n").unwrap();
let msg = con.next_msg_to_send().unwrap();
assert!(matches!(msg.0, MsgKind::ServerProtocolInfo(_)));
}
#[test]
fn handshake() {
#[rustfmt::skip]
let rng = vec![
0x14, 0xa2, 0x04, 0xa5, 0x4b, 0x2f, 0x5f, 0xa7, 0xff, 0x53, 0x13, 0x67, 0x57, 0x67, 0xbc,
0x55, 0x3f, 0xc0, 0x6c, 0x0d, 0x07, 0x8f, 0xe2, 0x75, 0x95, 0x18, 0x4b, 0xd2, 0xcb, 0xd0,
0x64, 0x06, 0x14, 0xa2, 0x04, 0xa5, 0x4b, 0x2f, 0x5f, 0xa7, 0xff, 0x53, 0x13, 0x67, 0x57,
0x67, 0xbc, 0x55, 0x3f, 0xc0, 0x6c, 0x0d, 0x07, 0x8f, 0xe2, 0x75, 0x95, 0x18, 0x4b, 0xd2,
0xcb, 0xd0, 0x64, 0x06, 0x67, 0xbc, 0x55, 0x3f, 0xc0, 0x6c, 0x0d, 0x07, 0x8f, 0xe2, 0x75,
0x95, 0x18, 0x4b, 0xd2, 0xcb, 0xd0, 0x64, 0x06,
];
struct Part {
client: &'static [u8],
server: &'static [u8],
}
// Extracted from a real OpenSSH client using this server (with hardcoded creds) using Wireshark.
let conversation = [
Part {
client: &hex!("5353482d322e302d4f70656e5353485f392e370d0a"),
server: &hex!("5353482d322e302d4f70656e5353485f392e370d0a"),
},
// KEX Init
Part {
client: &hex!(
"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"
),
server: &hex!(
"000000bc051414a204a54b2f5fa7ff5313675767bc5500000011637572766532353531392d7368613235360000000b7373682d656432353531390000001d63686163686132302d706f6c7931333035406f70656e7373682e636f6d0000001d63686163686132302d706f6c7931333035406f70656e7373682e636f6d0000000d686d61632d736861322d3235360000000d686d61632d736861322d323536000000046e6f6e65000000046e6f6e65000000000000000000000000000000000000"
),
},
// ECDH KEX Init
Part {
client: &hex!(
"0000002c061e000000204c646d1281abf23264d63db96e05c0223cfead668d9d38c62579b8856e67ae19000000000000"
),
server: &hex!(
"000000bc081f000000330000000b7373682d6564323535313900000020e939cdfa6fc0d737333b534e913dd332c8d5179fe00c3045575217224b19b8f6000000204260e2c5e5383f1a021c9631fa61f60f305b29183fd219d4c8207c664e063410000000530000000b7373682d65643235353139000000406504a045499f26aa4ee17606ea6bd9e3f288838591f25d8604a63f77a52f5b9e909c00d10f386553e585d86ab329bbde0fca5c64b1b1982d7adcac17cf7f06010000000000000000"
),
},
// New Keys
Part {
client: &hex!("0000000c0a1500000000000000000000"),
server: &hex!("0000000c0a1500000000000000000000"),
},
// Service Request (encrypted)
Part {
client: &hex!("09ca4db7baeb24836a1f7d22368055bf4c26981ed86738ac7a5c31d0730ad656f1967853781dff91ee1c4de8"),
server: &hex!("7b444c0d5faf740d350701a054ea469fab1c98e4b669e4872a454163edb42ec5e4fa95c404ab601f016bd259"),
},
];
let mut con = ServerConnection::new(HardcodedRng(rng));
for part in conversation {
con.recv_bytes(&part.client).unwrap();
eprintln!("client: {:x?}", part.client);
let bytes = con.next_msg_to_send().unwrap().to_bytes();
if part.server != bytes {
panic!(
"expected != found\nexpected: {:x?}\nfound: {:x?}",
part.server, bytes
);
}
}
}
}

6
ssh/Cargo.toml Normal file
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@ -0,0 +1,6 @@
[package]
name = "ssh"
version = "0.1.0"
edition = "2021"
[dependencies]

3
ssh/README.md Normal file
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@ -0,0 +1,3 @@
# ssh
`ssh(1)` SSH client.

3
ssh/src/main.rs Normal file
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@ -0,0 +1,3 @@
fn main() {
println!("Hello, world!");
}