_ Git - rust-lightning/blob - fuzz/src/router.rs

   1 // This file is Copyright its original authors, visible in version control
   2 // history.
   3 //
   4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
   5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
   7 // You may not use this file except in accordance with one or both of these
   8 // licenses.
   9
  10 use bitcoin::amount::Amount;
  11 use bitcoin::blockdata::constants::ChainHash;
  12 use bitcoin::blockdata::script::Builder;
  13 use bitcoin::blockdata::transaction::TxOut;
  14
  15 use lightning::blinded_path::{BlindedHop, BlindedPath, IntroductionNode};
  16 use lightning::chain::transaction::OutPoint;
  17 use lightning::ln::ChannelId;
  18 use lightning::ln::channel_state::{ChannelDetails, ChannelCounterparty, ChannelShutdownState};
  19 use lightning::ln::channelmanager;
  20 use lightning::ln::features::{BlindedHopFeatures, Bolt12InvoiceFeatures};
  21 use lightning::ln::msgs;
  22 use lightning::offers::invoice::BlindedPayInfo;
  23 use lightning::routing::gossip::{NetworkGraph, RoutingFees};
  24 use lightning::routing::utxo::{UtxoFuture, UtxoLookup, UtxoLookupError, UtxoResult};
  25 use lightning::routing::router::{find_route, PaymentParameters, RouteHint, RouteHintHop, RouteParameters};
  26 use lightning::routing::scoring::{ProbabilisticScorer, ProbabilisticScoringFeeParameters, ProbabilisticScoringDecayParameters};
  27 use lightning::util::config::UserConfig;
  28 use lightning::util::hash_tables::*;
  29 use lightning::util::ser::Readable;
  30
  31 use bitcoin::hashes::Hash;
  32 use bitcoin::secp256k1::PublicKey;
  33 use bitcoin::network::Network;
  34
  35 use crate::utils::test_logger;
  36
  37 use std::convert::TryInto;
  38 use std::sync::Arc;
  39 use std::sync::atomic::{AtomicUsize, Ordering};
  40
  41 #[inline]
  42 pub fn slice_to_be16(v: &[u8]) -> u16 {
  43         ((v[0] as u16) << 8*1) |
  44         ((v[1] as u16) << 8*0)
  45 }
  46
  47 #[inline]
  48 pub fn slice_to_be32(v: &[u8]) -> u32 {
  49         ((v[0] as u32) << 8*3) |
  50         ((v[1] as u32) << 8*2) |
  51         ((v[2] as u32) << 8*1) |
  52         ((v[3] as u32) << 8*0)
  53 }
  54
  55 #[inline]
  56 pub fn slice_to_be64(v: &[u8]) -> u64 {
  57         ((v[0] as u64) << 8*7) |
  58         ((v[1] as u64) << 8*6) |
  59         ((v[2] as u64) << 8*5) |
  60         ((v[3] as u64) << 8*4) |
  61         ((v[4] as u64) << 8*3) |
  62         ((v[5] as u64) << 8*2) |
  63         ((v[6] as u64) << 8*1) |
  64         ((v[7] as u64) << 8*0)
  65 }
  66
  67
  68 struct InputData {
  69         data: Vec<u8>,
  70         read_pos: AtomicUsize,
  71 }
  72 impl InputData {
  73         fn get_slice(&self, len: usize) -> Option<&[u8]> {
  74                 let old_pos = self.read_pos.fetch_add(len, Ordering::AcqRel);
  75                 if self.data.len() < old_pos + len {
  76                         return None;
  77                 }
  78                 Some(&self.data[old_pos..old_pos + len])
  79         }
  80         fn get_slice_nonadvancing(&self, len: usize) -> Option<&[u8]> {
  81                 let old_pos = self.read_pos.load(Ordering::Acquire);
  82                 if self.data.len() < old_pos + len {
  83                         return None;
  84                 }
  85                 Some(&self.data[old_pos..old_pos + len])
  86         }
  87 }
  88
  89 struct FuzzChainSource<'a, 'b, Out: test_logger::Output> {
  90         input: Arc<InputData>,
  91         net_graph: &'a NetworkGraph<&'b test_logger::TestLogger<Out>>,
  92 }
  93 impl<Out: test_logger::Output> UtxoLookup for FuzzChainSource<'_, '_, Out> {
  94         fn get_utxo(&self, _chain_hash: &ChainHash, _short_channel_id: u64) -> UtxoResult {
  95                 let input_slice = self.input.get_slice(2);
  96                 if input_slice.is_none() { return UtxoResult::Sync(Err(UtxoLookupError::UnknownTx)); }
  97                 let input_slice = input_slice.unwrap();
  98                 let txo_res = TxOut {
  99                         value: Amount::from_sat(if input_slice[0] % 2 == 0 { 1_000_000 } else { 1_000 }),
 100                         script_pubkey: Builder::new().push_int(input_slice[1] as i64).into_script().to_p2wsh(),
 101                 };
 102                 match input_slice {
 103                         &[0, _] => UtxoResult::Sync(Err(UtxoLookupError::UnknownChain)),
 104                         &[1, _] => UtxoResult::Sync(Err(UtxoLookupError::UnknownTx)),
 105                         &[2, _] => {
 106                                 let future = UtxoFuture::new();
 107                                 future.resolve_without_forwarding(self.net_graph, Ok(txo_res));
 108                                 UtxoResult::Async(future.clone())
 109                         },
 110                         &[3, _] => {
 111                                 let future = UtxoFuture::new();
 112                                 future.resolve_without_forwarding(self.net_graph, Err(UtxoLookupError::UnknownTx));
 113                                 UtxoResult::Async(future.clone())
 114                         },
 115                         &[4, _] => {
 116                                 UtxoResult::Async(UtxoFuture::new()) // the future will never resolve
 117                         },
 118                         &[..] => UtxoResult::Sync(Ok(txo_res)),
 119                 }
 120         }
 121 }
 122
 123 #[inline]
 124 pub fn do_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 125         let input = Arc::new(InputData {
 126                 data: data.to_vec(),
 127                 read_pos: AtomicUsize::new(0),
 128         });
 129         macro_rules! get_slice_nonadvancing {
 130                 ($len: expr) => {
 131                         match input.get_slice_nonadvancing($len as usize) {
 132                                 Some(slice) => slice,
 133                                 None => return,
 134                         }
 135                 }
 136         }
 137         macro_rules! get_slice {
 138                 ($len: expr) => {
 139                         match input.get_slice($len as usize) {
 140                                 Some(slice) => slice,
 141                                 None => return,
 142                         }
 143                 }
 144         }
 145
 146         macro_rules! decode_msg {
 147                 ($MsgType: path, $len: expr) => {{
 148                         let mut reader = ::std::io::Cursor::new(get_slice!($len));
 149                         match <$MsgType>::read(&mut reader) {
 150                                 Ok(msg) => {
 151                                         assert_eq!(reader.position(), $len as u64);
 152                                         msg
 153                                 },
 154                                 Err(e) => match e {
 155                                         msgs::DecodeError::UnknownVersion => return,
 156                                         msgs::DecodeError::UnknownRequiredFeature => return,
 157                                         msgs::DecodeError::InvalidValue => return,
 158                                         msgs::DecodeError::BadLengthDescriptor => return,
 159                                         msgs::DecodeError::ShortRead => panic!("We picked the length..."),
 160                                         msgs::DecodeError::Io(e) => panic!("{:?}", e),
 161                                         msgs::DecodeError::UnsupportedCompression => return,
 162                                         msgs::DecodeError::DangerousValue => return,
 163                                 }
 164                         }
 165                 }}
 166         }
 167
 168         macro_rules! decode_msg_with_len16 {
 169                 ($MsgType: path, $excess: expr) => {
 170                         {
 171                                 let extra_len = slice_to_be16(get_slice_nonadvancing!(2));
 172                                 decode_msg!($MsgType, 2 + (extra_len as usize) + $excess)
 173                         }
 174                 }
 175         }
 176
 177         macro_rules! get_pubkey_from_node_id {
 178                 ($node_id: expr ) => {
 179                         match PublicKey::from_slice($node_id.as_slice()) {
 180                                 Ok(pk) => pk,
 181                                 Err(_) => return,
 182                         }
 183                 }
 184         }
 185
 186         macro_rules! get_pubkey {
 187                 () => {
 188                         match PublicKey::from_slice(get_slice!(33)) {
 189                                 Ok(key) => key,
 190                                 Err(_) => return,
 191                         }
 192                 }
 193         }
 194
 195         let logger = test_logger::TestLogger::new("".to_owned(), out);
 196
 197         let our_pubkey = get_pubkey!();
 198         let net_graph = NetworkGraph::new(Network::Bitcoin, &logger);
 199         let chain_source = FuzzChainSource {
 200                 input: Arc::clone(&input),
 201                 net_graph: &net_graph,
 202         };
 203
 204         let mut node_pks = new_hash_map();
 205         let mut scid = 42;
 206
 207         macro_rules! first_hops {
 208                 ($first_hops_vec: expr) => {
 209                         match get_slice!(1)[0] {
 210                                 0 => None,
 211                                 count => {
 212                                         for _ in 0..count {
 213                                                 scid += 1;
 214                                                 let (rnid, _) =
 215                                                         node_pks.iter().skip(u16::from_be_bytes(get_slice!(2).try_into().unwrap()) as usize % node_pks.len()).next().unwrap();
 216                                                 let capacity = u64::from_be_bytes(get_slice!(8).try_into().unwrap());
 217                                                 $first_hops_vec.push(ChannelDetails {
 218                                                         channel_id: ChannelId::new_zero(),
 219                                                         counterparty: ChannelCounterparty {
 220                                                                 node_id: *rnid,
 221                                                                 features: channelmanager::provided_init_features(&UserConfig::default()),
 222                                                                 unspendable_punishment_reserve: 0,
 223                                                                 forwarding_info: None,
 224                                                                 outbound_htlc_minimum_msat: None,
 225                                                                 outbound_htlc_maximum_msat: None,
 226                                                         },
 227                                                         funding_txo: Some(OutPoint { txid: bitcoin::Txid::from_slice(&[0; 32]).unwrap(), index: 0 }),
 228                                                         channel_type: None,
 229                                                         short_channel_id: Some(scid),
 230                                                         inbound_scid_alias: None,
 231                                                         outbound_scid_alias: None,
 232                                                         channel_value_satoshis: capacity,
 233                                                         user_channel_id: 0, inbound_capacity_msat: 0,
 234                                                         unspendable_punishment_reserve: None,
 235                                                         confirmations_required: None,
 236                                                         confirmations: None,
 237                                                         force_close_spend_delay: None,
 238                                                         is_outbound: true, is_channel_ready: true,
 239                                                         is_usable: true, is_public: true,
 240                                                         balance_msat: 0,
 241                                                         outbound_capacity_msat: capacity.saturating_mul(1000),
 242                                                         next_outbound_htlc_limit_msat: capacity.saturating_mul(1000),
 243                                                         next_outbound_htlc_minimum_msat: 0,
 244                                                         inbound_htlc_minimum_msat: None,
 245                                                         inbound_htlc_maximum_msat: None,
 246                                                         config: None,
 247                                                         feerate_sat_per_1000_weight: None,
 248                                                         channel_shutdown_state: Some(ChannelShutdownState::NotShuttingDown),
 249                                                         pending_inbound_htlcs: Vec::new(),
 250                                                         pending_outbound_htlcs: Vec::new(),
 251                                                 });
 252                                         }
 253                                         Some(&$first_hops_vec[..])
 254                                 },
 255                         }
 256                 }
 257         }
 258
 259         macro_rules! last_hops {
 260                 ($last_hops: expr) => {
 261                         let count = get_slice!(1)[0];
 262                         for _ in 0..count {
 263                                 scid += 1;
 264                                 let (rnid, _) =
 265                                         node_pks.iter().skip(slice_to_be16(get_slice!(2)) as usize % node_pks.len()).next().unwrap();
 266                                 $last_hops.push(RouteHint(vec![RouteHintHop {
 267                                         src_node_id: *rnid,
 268                                         short_channel_id: scid,
 269                                         fees: RoutingFees {
 270                                                 base_msat: slice_to_be32(get_slice!(4)),
 271                                                 proportional_millionths: slice_to_be32(get_slice!(4)),
 272                                         },
 273                                         cltv_expiry_delta: slice_to_be16(get_slice!(2)),
 274                                         htlc_minimum_msat: Some(slice_to_be64(get_slice!(8))),
 275                                         htlc_maximum_msat: None,
 276                                 }]));
 277                         }
 278                 }
 279         }
 280
 281         macro_rules! find_routes {
 282                 ($first_hops: expr, $node_pks: expr, $route_params: expr) => {
 283                         let scorer = ProbabilisticScorer::new(ProbabilisticScoringDecayParameters::default(), &net_graph, &logger);
 284                         let random_seed_bytes: [u8; 32] = [get_slice!(1)[0]; 32];
 285                         for (target, ()) in $node_pks {
 286                                 let final_value_msat = slice_to_be64(get_slice!(8));
 287                                 let final_cltv_expiry_delta = slice_to_be32(get_slice!(4));
 288                                 let route_params = $route_params(final_value_msat, final_cltv_expiry_delta, target);
 289                                 let _ = find_route(&our_pubkey, &route_params, &net_graph,
 290                                         $first_hops.map(|c| c.iter().collect::<Vec<_>>()).as_ref().map(|a| a.as_slice()),
 291                                         &logger, &scorer, &ProbabilisticScoringFeeParameters::default(), &random_seed_bytes);
 292                         }
 293                 }
 294         }
 295
 296         loop {
 297                 match get_slice!(1)[0] {
 298                         0 => {
 299                                 let start_len = slice_to_be16(&get_slice_nonadvancing!(2)[0..2]) as usize;
 300                                 let addr_len = slice_to_be16(&get_slice_nonadvancing!(start_len+2 + 74)[start_len+2 + 72..start_len+2 + 74]);
 301                                 if addr_len > (37+1)*4 {
 302                                         return;
 303                                 }
 304                                 let msg = decode_msg_with_len16!(msgs::UnsignedNodeAnnouncement, 288);
 305                                 node_pks.insert(get_pubkey_from_node_id!(msg.node_id), ());
 306                                 let _ = net_graph.update_node_from_unsigned_announcement(&msg);
 307                         },
 308                         1 => {
 309                                 let msg = decode_msg_with_len16!(msgs::UnsignedChannelAnnouncement, 32+8+33*4);
 310                                 node_pks.insert(get_pubkey_from_node_id!(msg.node_id_1), ());
 311                                 node_pks.insert(get_pubkey_from_node_id!(msg.node_id_2), ());
 312                                 let _ = net_graph.update_channel_from_unsigned_announcement::
 313                                         <&FuzzChainSource<'_, '_, Out>>(&msg, &None);
 314                         },
 315                         2 => {
 316                                 let msg = decode_msg_with_len16!(msgs::UnsignedChannelAnnouncement, 32+8+33*4);
 317                                 node_pks.insert(get_pubkey_from_node_id!(msg.node_id_1), ());
 318                                 node_pks.insert(get_pubkey_from_node_id!(msg.node_id_2), ());
 319                                 let _ = net_graph.update_channel_from_unsigned_announcement(&msg, &Some(&chain_source));
 320                         },
 321                         3 => {
 322                                 let _ = net_graph.update_channel_unsigned(&decode_msg!(msgs::UnsignedChannelUpdate, 72));
 323                         },
 324                         4 => {
 325                                 let short_channel_id = slice_to_be64(get_slice!(8));
 326                                 net_graph.channel_failed_permanent(short_channel_id);
 327                         },
 328                         _ if node_pks.is_empty() => {},
 329                         x if x < 250 => {
 330                                 let mut first_hops_vec = Vec::new();
 331                                 // Use macros here and in the blinded match arm to ensure values are fetched from the fuzz
 332                                 // input in the same order, for better coverage.
 333                                 let first_hops = first_hops!(first_hops_vec);
 334                                 let mut last_hops = Vec::new();
 335                                 last_hops!(last_hops);
 336                                 find_routes!(first_hops, node_pks.iter(), |final_amt, final_delta, target: &PublicKey| {
 337                                         RouteParameters::from_payment_params_and_value(
 338                                                 PaymentParameters::from_node_id(*target, final_delta)
 339                                                         .with_route_hints(last_hops.clone()).unwrap(),
 340                                                 final_amt)
 341                                 });
 342                         },
 343                         x => {
 344                                 let mut first_hops_vec = Vec::new();
 345                                 let first_hops = first_hops!(first_hops_vec);
 346                                 let mut last_hops_unblinded = Vec::new();
 347                                 last_hops!(last_hops_unblinded);
 348                                 let dummy_pk = PublicKey::from_slice(&[2; 33]).unwrap();
 349                                 let last_hops: Vec<(BlindedPayInfo, BlindedPath)> = last_hops_unblinded.into_iter().map(|hint| {
 350                                         let hop = &hint.0[0];
 351                                         let payinfo = BlindedPayInfo {
 352                                                 fee_base_msat: hop.fees.base_msat,
 353                                                 fee_proportional_millionths: hop.fees.proportional_millionths,
 354                                                 htlc_minimum_msat: hop.htlc_minimum_msat.unwrap(),
 355                                                 htlc_maximum_msat: hop.htlc_minimum_msat.unwrap().saturating_mul(100),
 356                                                 cltv_expiry_delta: hop.cltv_expiry_delta,
 357                                                 features: BlindedHopFeatures::empty(),
 358                                         };
 359                                         let num_blinded_hops = x % 250;
 360                                         let mut blinded_hops = Vec::new();
 361                                         for _ in 0..num_blinded_hops {
 362                                                 blinded_hops.push(BlindedHop {
 363                                                         blinded_node_id: dummy_pk,
 364                                                         encrypted_payload: Vec::new()
 365                                                 });
 366                                         }
 367                                         (payinfo, BlindedPath {
 368                                                 introduction_node: IntroductionNode::NodeId(hop.src_node_id),
 369                                                 blinding_point: dummy_pk,
 370                                                 blinded_hops,
 371                                         })
 372                                 }).collect();
 373                                 let mut features = Bolt12InvoiceFeatures::empty();
 374                                 features.set_basic_mpp_optional();
 375                                 find_routes!(first_hops, [(dummy_pk, ())].iter(), |final_amt, _, _| {
 376                                         RouteParameters::from_payment_params_and_value(PaymentParameters::blinded(last_hops.clone())
 377                                                 .with_bolt12_features(features.clone()).unwrap(),
 378                                         final_amt)
 379                                 });
 380                         }
 381                 }
 382         }
 383 }
 384
 385 pub fn router_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 386         do_test(data, out);
 387 }
 388
 389 #[no_mangle]
 390 pub extern "C" fn router_run(data: *const u8, datalen: usize) {
 391         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull {});
 392 }