_ Git - rust-lightning/blob - fuzz/fuzz_targets/router_target.rs

   1 extern crate bitcoin;
   2 extern crate lightning;
   3 extern crate secp256k1;
   4
   5 use bitcoin::util::hash::Sha256dHash;
   6 use bitcoin::blockdata::script::{Script, Builder};
   7
   8 use lightning::chain::chaininterface::{ChainError,ChainWatchInterface, ChainListener};
   9 use lightning::ln::channelmanager::ChannelDetails;
  10 use lightning::ln::msgs;
  11 use lightning::ln::msgs::{MsgDecodable, RoutingMessageHandler};
  12 use lightning::ln::router::{Router, RouteHint};
  13 use lightning::util::reset_rng_state;
  14 use lightning::util::logger::Logger;
  15
  16 use secp256k1::key::PublicKey;
  17 use secp256k1::Secp256k1;
  18
  19 mod utils;
  20
  21 use utils::test_logger;
  22
  23 use std::sync::{Weak, Arc};
  24 use std::sync::atomic::{AtomicUsize, Ordering};
  25
  26 #[inline]
  27 pub fn slice_to_be16(v: &[u8]) -> u16 {
  28         ((v[0] as u16) << 8*1) |
  29         ((v[1] as u16) << 8*0)
  30 }
  31
  32 #[inline]
  33 pub fn slice_to_be32(v: &[u8]) -> u32 {
  34         ((v[0] as u32) << 8*3) |
  35         ((v[1] as u32) << 8*2) |
  36         ((v[2] as u32) << 8*1) |
  37         ((v[3] as u32) << 8*0)
  38 }
  39
  40 #[inline]
  41 pub fn slice_to_be64(v: &[u8]) -> u64 {
  42         ((v[0] as u64) << 8*7) |
  43         ((v[1] as u64) << 8*6) |
  44         ((v[2] as u64) << 8*5) |
  45         ((v[3] as u64) << 8*4) |
  46         ((v[4] as u64) << 8*3) |
  47         ((v[5] as u64) << 8*2) |
  48         ((v[6] as u64) << 8*1) |
  49         ((v[7] as u64) << 8*0)
  50 }
  51
  52
  53 struct InputData {
  54         data: Vec<u8>,
  55         read_pos: AtomicUsize,
  56 }
  57 impl InputData {
  58         fn get_slice(&self, len: usize) -> Option<&[u8]> {
  59                 let old_pos = self.read_pos.fetch_add(len, Ordering::AcqRel);
  60                 if self.data.len() < old_pos + len {
  61                         return None;
  62                 }
  63                 Some(&self.data[old_pos..old_pos + len])
  64         }
  65         fn get_slice_nonadvancing(&self, len: usize) -> Option<&[u8]> {
  66                 let old_pos = self.read_pos.load(Ordering::Acquire);
  67                 if self.data.len() < old_pos + len {
  68                         return None;
  69                 }
  70                 Some(&self.data[old_pos..old_pos + len])
  71         }
  72 }
  73
  74 struct DummyChainWatcher {
  75         input: Arc<InputData>,
  76 }
  77
  78 impl ChainWatchInterface for DummyChainWatcher {
  79         fn install_watch_tx(&self, _txid: &Sha256dHash, _script_pub_key: &Script) { }
  80         fn install_watch_outpoint(&self, _outpoint: (Sha256dHash, u32), _out_script: &Script) { }
  81         fn watch_all_txn(&self) { }
  82         fn register_listener(&self, _listener: Weak<ChainListener>) { }
  83
  84         fn get_chain_utxo(&self, _genesis_hash: Sha256dHash, _unspent_tx_output_identifier: u64) -> Result<(Script, u64), ChainError> {
  85                 match self.input.get_slice(2) {
  86                         Some(&[0, _]) => Err(ChainError::NotSupported),
  87                         Some(&[1, _]) => Err(ChainError::NotWatched),
  88                         Some(&[2, _]) => Err(ChainError::UnknownTx),
  89                         Some(&[_, x]) => Ok((Builder::new().push_int(x as i64).into_script().to_v0_p2wsh(), 0)),
  90                         None => Err(ChainError::UnknownTx),
  91                         _ => unreachable!(),
  92                 }
  93         }
  94 }
  95
  96 #[inline]
  97 pub fn do_test(data: &[u8]) {
  98         reset_rng_state();
  99
 100         let input = Arc::new(InputData {
 101                 data: data.to_vec(),
 102                 read_pos: AtomicUsize::new(0),
 103         });
 104         macro_rules! get_slice_nonadvancing {
 105                 ($len: expr) => {
 106                         match input.get_slice_nonadvancing($len as usize) {
 107                                 Some(slice) => slice,
 108                                 None => return,
 109                         }
 110                 }
 111         }
 112         macro_rules! get_slice {
 113                 ($len: expr) => {
 114                         match input.get_slice($len as usize) {
 115                                 Some(slice) => slice,
 116                                 None => return,
 117                         }
 118                 }
 119         }
 120
 121         macro_rules! decode_msg {
 122                 ($MsgType: path, $len: expr) => {
 123                         match <($MsgType)>::decode(get_slice!($len)) {
 124                                 Ok(msg) => msg,
 125                                 Err(e) => match e {
 126                                         msgs::DecodeError::UnknownRealmByte => return,
 127                                         msgs::DecodeError::UnknownRequiredFeature => return,
 128                                         msgs::DecodeError::BadPublicKey => return,
 129                                         msgs::DecodeError::BadSignature => return,
 130                                         msgs::DecodeError::BadText => return,
 131                                         msgs::DecodeError::ExtraAddressesPerType => return,
 132                                         msgs::DecodeError::BadLengthDescriptor => return,
 133                                         msgs::DecodeError::ShortRead => panic!("We picked the length..."),
 134                                 }
 135                         }
 136                 }
 137         }
 138
 139         macro_rules! decode_msg_with_len16 {
 140                 ($MsgType: path, $begin_len: expr, $excess: expr) => {
 141                         {
 142                                 let extra_len = slice_to_be16(&get_slice_nonadvancing!($begin_len as usize + 2)[$begin_len..$begin_len + 2]);
 143                                 decode_msg!($MsgType, $begin_len as usize + 2 + (extra_len as usize) + $excess)
 144                         }
 145                 }
 146         }
 147
 148         let secp_ctx = Secp256k1::new();
 149         macro_rules! get_pubkey {
 150                 () => {
 151                         match PublicKey::from_slice(&secp_ctx, get_slice!(33)) {
 152                                 Ok(key) => key,
 153                                 Err(_) => return,
 154                         }
 155                 }
 156         }
 157
 158         let logger: Arc<Logger> = Arc::new(test_logger::TestLogger{});
 159         let chain_monitor = Arc::new(DummyChainWatcher {
 160                 input: Arc::clone(&input),
 161         });
 162
 163         let our_pubkey = get_pubkey!();
 164         let router = Router::new(our_pubkey.clone(), chain_monitor, Arc::clone(&logger));
 165
 166         loop {
 167                 match get_slice!(1)[0] {
 168                         0 => {
 169                                 let start_len = slice_to_be16(&get_slice_nonadvancing!(64 + 2)[64..64 + 2]) as usize;
 170                                 let addr_len = slice_to_be16(&get_slice_nonadvancing!(64+start_len+2 + 74)[64+start_len+2 + 72..64+start_len+2 + 74]);
 171                                 if addr_len > (37+1)*4 {
 172                                         return;
 173                                 }
 174                                 let _ = router.handle_node_announcement(&decode_msg_with_len16!(msgs::NodeAnnouncement, 64, 288));
 175                         },
 176                         1 => {
 177                                 let _ = router.handle_channel_announcement(&decode_msg_with_len16!(msgs::ChannelAnnouncement, 64*4, 32+8+33*4));
 178                         },
 179                         2 => {
 180                                 let _ = router.handle_channel_update(&decode_msg!(msgs::ChannelUpdate, 128));
 181                         },
 182                         3 => {
 183                                 match get_slice!(1)[0] {
 184                                         0 => {
 185                                                 router.handle_htlc_fail_channel_update(&msgs::HTLCFailChannelUpdate::ChannelUpdateMessage {msg: decode_msg!(msgs::ChannelUpdate, 128)});
 186                                         },
 187                                         1 => {
 188                                                 let short_channel_id = slice_to_be64(get_slice!(8));
 189                                                 router.handle_htlc_fail_channel_update(&msgs::HTLCFailChannelUpdate::ChannelClosed {short_channel_id});
 190                                         },
 191                                         _ => return,
 192                                 }
 193                         },
 194                         4 => {
 195                                 let target = get_pubkey!();
 196                                 let mut first_hops_vec = Vec::new();
 197                                 let first_hops = match get_slice!(1)[0] {
 198                                         0 => None,
 199                                         1 => {
 200                                                 let count = slice_to_be16(get_slice!(2));
 201                                                 for _ in 0..count {
 202                                                         first_hops_vec.push(ChannelDetails {
 203                                                                 channel_id: [0; 32],
 204                                                                 short_channel_id: Some(slice_to_be64(get_slice!(8))),
 205                                                                 remote_network_id: get_pubkey!(),
 206                                                                 channel_value_satoshis: slice_to_be64(get_slice!(8)),
 207                                                                 user_id: 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 #[cfg(feature = "afl")]
 237 #[macro_use] extern crate afl;
 238 #[cfg(feature = "afl")]
 239 fn main() {
 240         fuzz!(|data| {
 241                 do_test(data);
 242         });
 243 }
 244
 245 #[cfg(feature = "honggfuzz")]
 246 #[macro_use] extern crate honggfuzz;
 247 #[cfg(feature = "honggfuzz")]
 248 fn main() {
 249         loop {
 250                 fuzz!(|data| {
 251                         do_test(data);
 252                 });
 253         }
 254 }
 255
 256 extern crate hex;
 257 #[cfg(test)]
 258 mod tests {
 259
 260         #[test]
 261         fn duplicate_crash() {
 262                 super::do_test(&::hex::decode("00").unwrap());
 263         }
 264 }