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

   1 use bitcoin_hashes::sha256d::Hash as Sha256dHash;
   2 use bitcoin::blockdata::script::{Script, Builder};
   3 use bitcoin::blockdata::block::Block;
   4 use bitcoin::blockdata::transaction::Transaction;
   5
   6 use lightning::chain::chaininterface::{ChainError,ChainWatchInterface};
   7 use lightning::ln::channelmanager::ChannelDetails;
   8 use lightning::ln::features::InitFeatures;
   9 use lightning::ln::msgs;
  10 use lightning::ln::msgs::RoutingMessageHandler;
  11 use lightning::ln::router::{Router, RouteHint};
  12 use lightning::util::logger::Logger;
  13 use lightning::util::ser::Readable;
  14
  15 use secp256k1::key::PublicKey;
  16
  17 use utils::test_logger;
  18
  19 use std::sync::Arc;
  20 use std::sync::atomic::{AtomicUsize, Ordering};
  21
  22 #[inline]
  23 pub fn slice_to_be16(v: &[u8]) -> u16 {
  24         ((v[0] as u16) << 8*1) |
  25         ((v[1] as u16) << 8*0)
  26 }
  27
  28 #[inline]
  29 pub fn slice_to_be32(v: &[u8]) -> u32 {
  30         ((v[0] as u32) << 8*3) |
  31         ((v[1] as u32) << 8*2) |
  32         ((v[2] as u32) << 8*1) |
  33         ((v[3] as u32) << 8*0)
  34 }
  35
  36 #[inline]
  37 pub fn slice_to_be64(v: &[u8]) -> u64 {
  38         ((v[0] as u64) << 8*7) |
  39         ((v[1] as u64) << 8*6) |
  40         ((v[2] as u64) << 8*5) |
  41         ((v[3] as u64) << 8*4) |
  42         ((v[4] as u64) << 8*3) |
  43         ((v[5] as u64) << 8*2) |
  44         ((v[6] as u64) << 8*1) |
  45         ((v[7] as u64) << 8*0)
  46 }
  47
  48
  49 struct InputData {
  50         data: Vec<u8>,
  51         read_pos: AtomicUsize,
  52 }
  53 impl InputData {
  54         fn get_slice(&self, len: usize) -> Option<&[u8]> {
  55                 let old_pos = self.read_pos.fetch_add(len, Ordering::AcqRel);
  56                 if self.data.len() < old_pos + len {
  57                         return None;
  58                 }
  59                 Some(&self.data[old_pos..old_pos + len])
  60         }
  61         fn get_slice_nonadvancing(&self, len: usize) -> Option<&[u8]> {
  62                 let old_pos = self.read_pos.load(Ordering::Acquire);
  63                 if self.data.len() < old_pos + len {
  64                         return None;
  65                 }
  66                 Some(&self.data[old_pos..old_pos + len])
  67         }
  68 }
  69
  70 struct DummyChainWatcher {
  71         input: Arc<InputData>,
  72 }
  73
  74 impl ChainWatchInterface for DummyChainWatcher {
  75         fn install_watch_tx(&self, _txid: &Sha256dHash, _script_pub_key: &Script) { }
  76         fn install_watch_outpoint(&self, _outpoint: (Sha256dHash, u32), _out_script: &Script) { }
  77         fn watch_all_txn(&self) { }
  78         fn filter_block<'a>(&self, _block: &'a Block) -> (Vec<&'a Transaction>, Vec<u32>) {
  79                 (Vec::new(), Vec::new())
  80         }
  81         fn reentered(&self) -> usize { 0 }
  82
  83         fn get_chain_utxo(&self, _genesis_hash: Sha256dHash, _unspent_tx_output_identifier: u64) -> Result<(Script, u64), ChainError> {
  84                 match self.input.get_slice(2) {
  85                         Some(&[0, _]) => Err(ChainError::NotSupported),
  86                         Some(&[1, _]) => Err(ChainError::NotWatched),
  87                         Some(&[2, _]) => Err(ChainError::UnknownTx),
  88                         Some(&[_, x]) => Ok((Builder::new().push_int(x as i64).into_script().to_v0_p2wsh(), 0)),
  89                         None => Err(ChainError::UnknownTx),
  90                         _ => unreachable!(),
  91                 }
  92         }
  93 }
  94
  95 #[inline]
  96 pub fn do_test(data: &[u8]) {
  97         let input = Arc::new(InputData {
  98                 data: data.to_vec(),
  99                 read_pos: AtomicUsize::new(0),
 100         });
 101         macro_rules! get_slice_nonadvancing {
 102                 ($len: expr) => {
 103                         match input.get_slice_nonadvancing($len as usize) {
 104                                 Some(slice) => slice,
 105                                 None => return,
 106                         }
 107                 }
 108         }
 109         macro_rules! get_slice {
 110                 ($len: expr) => {
 111                         match input.get_slice($len as usize) {
 112                                 Some(slice) => slice,
 113                                 None => return,
 114                         }
 115                 }
 116         }
 117
 118         macro_rules! decode_msg {
 119                 ($MsgType: path, $len: expr) => {{
 120                         let mut reader = ::std::io::Cursor::new(get_slice!($len));
 121                         match <($MsgType)>::read(&mut reader) {
 122                                 Ok(msg) => msg,
 123                                 Err(e) => match e {
 124                                         msgs::DecodeError::UnknownVersion => return,
 125                                         msgs::DecodeError::UnknownRequiredFeature => return,
 126                                         msgs::DecodeError::InvalidValue => return,
 127                                         msgs::DecodeError::ExtraAddressesPerType => return,
 128                                         msgs::DecodeError::BadLengthDescriptor => return,
 129                                         msgs::DecodeError::ShortRead => panic!("We picked the length..."),
 130                                         msgs::DecodeError::Io(e) => panic!(format!("{}", e)),
 131                                 }
 132                         }
 133                 }}
 134         }
 135
 136         macro_rules! decode_msg_with_len16 {
 137                 ($MsgType: path, $begin_len: expr, $excess: expr) => {
 138                         {
 139                                 let extra_len = slice_to_be16(&get_slice_nonadvancing!($begin_len as usize + 2)[$begin_len..$begin_len + 2]);
 140                                 decode_msg!($MsgType, $begin_len as usize + 2 + (extra_len as usize) + $excess)
 141                         }
 142                 }
 143         }
 144
 145         macro_rules! get_pubkey {
 146                 () => {
 147                         match PublicKey::from_slice(get_slice!(33)) {
 148                                 Ok(key) => key,
 149                                 Err(_) => return,
 150                         }
 151                 }
 152         }
 153
 154         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new("".to_owned()));
 155         let chain_monitor = Arc::new(DummyChainWatcher {
 156                 input: Arc::clone(&input),
 157         });
 158
 159         let our_pubkey = get_pubkey!();
 160         let router = Router::new(our_pubkey.clone(), chain_monitor, Arc::clone(&logger));
 161
 162         loop {
 163                 match get_slice!(1)[0] {
 164                         0 => {
 165                                 let start_len = slice_to_be16(&get_slice_nonadvancing!(64 + 2)[64..64 + 2]) as usize;
 166                                 let addr_len = slice_to_be16(&get_slice_nonadvancing!(64+start_len+2 + 74)[64+start_len+2 + 72..64+start_len+2 + 74]);
 167                                 if addr_len > (37+1)*4 {
 168                                         return;
 169                                 }
 170                                 let _ = router.handle_node_announcement(&decode_msg_with_len16!(msgs::NodeAnnouncement, 64, 288));
 171                         },
 172                         1 => {
 173                                 let _ = router.handle_channel_announcement(&decode_msg_with_len16!(msgs::ChannelAnnouncement, 64*4, 32+8+33*4));
 174                         },
 175                         2 => {
 176                                 let _ = router.handle_channel_update(&decode_msg!(msgs::ChannelUpdate, 128));
 177                         },
 178                         3 => {
 179                                 match get_slice!(1)[0] {
 180                                         0 => {
 181                                                 router.handle_htlc_fail_channel_update(&msgs::HTLCFailChannelUpdate::ChannelUpdateMessage {msg: decode_msg!(msgs::ChannelUpdate, 128)});
 182                                         },
 183                                         1 => {
 184                                                 let short_channel_id = slice_to_be64(get_slice!(8));
 185                                                 router.handle_htlc_fail_channel_update(&msgs::HTLCFailChannelUpdate::ChannelClosed {short_channel_id, is_permanent: false});
 186                                         },
 187                                         _ => return,
 188                                 }
 189                         },
 190                         4 => {
 191                                 let target = get_pubkey!();
 192                                 let mut first_hops_vec = Vec::new();
 193                                 let first_hops = match get_slice!(1)[0] {
 194                                         0 => None,
 195                                         1 => {
 196                                                 let count = slice_to_be16(get_slice!(2));
 197                                                 for _ in 0..count {
 198                                                         first_hops_vec.push(ChannelDetails {
 199                                                                 channel_id: [0; 32],
 200                                                                 short_channel_id: Some(slice_to_be64(get_slice!(8))),
 201                                                                 remote_network_id: get_pubkey!(),
 202                                                                 counterparty_features: InitFeatures::empty(),
 203                                                                 channel_value_satoshis: slice_to_be64(get_slice!(8)),
 204                                                                 user_id: 0,
 205                                                                 inbound_capacity_msat: 0,
 206                                                                 is_live: true,
 207                                                                 outbound_capacity_msat: 0,
 208                                                         });
 209                                                 }
 210                                                 Some(&first_hops_vec[..])
 211                                         },
 212                                         _ => return,
 213                                 };
 214                                 let mut last_hops_vec = Vec::new();
 215                                 let last_hops = {
 216                                         let count = slice_to_be16(get_slice!(2));
 217                                         for _ in 0..count {
 218                                                 last_hops_vec.push(RouteHint {
 219                                                         src_node_id: get_pubkey!(),
 220                                                         short_channel_id: slice_to_be64(get_slice!(8)),
 221                                                         fee_base_msat: slice_to_be32(get_slice!(4)),
 222                                                         fee_proportional_millionths: slice_to_be32(get_slice!(4)),
 223                                                         cltv_expiry_delta: slice_to_be16(get_slice!(2)),
 224                                                         htlc_minimum_msat: slice_to_be64(get_slice!(8)),
 225                                                 });
 226                                         }
 227                                         &last_hops_vec[..]
 228                                 };
 229                                 let _ = router.get_route(&target, first_hops, last_hops, slice_to_be64(get_slice!(8)), slice_to_be32(get_slice!(4)));
 230                         },
 231                         _ => return,
 232                 }
 233         }
 234 }
 235
 236 #[no_mangle]
 237 pub extern "C" fn router_run(data: *const u8, datalen: usize) {
 238         do_test(unsafe { std::slice::from_raw_parts(data, datalen) });
 239 }