_ 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 use bitcoin::blockdata::opcodes;
   8
   9 use lightning::chain::chaininterface::{ChainError,ChainWatchInterface, ChainListener};
  10 use lightning::ln::channelmanager::ChannelDetails;
  11 use lightning::ln::msgs;
  12 use lightning::ln::msgs::{MsgDecodable, RoutingMessageHandler};
  13 use lightning::ln::router::{Router, RouteHint};
  14 use lightning::util::reset_rng_state;
  15 use lightning::util::logger::Logger;
  16
  17 use secp256k1::key::PublicKey;
  18 use secp256k1::Secp256k1;
  19
  20 mod utils;
  21
  22 use utils::test_logger;
  23
  24 use std::sync::{Weak, Arc};
  25 use std::sync::atomic::{AtomicUsize, Ordering};
  26
  27 #[inline]
  28 pub fn slice_to_be16(v: &[u8]) -> u16 {
  29         ((v[0] as u16) << 8*1) |
  30         ((v[1] as u16) << 8*0)
  31 }
  32
  33 #[inline]
  34 pub fn slice_to_be32(v: &[u8]) -> u32 {
  35         ((v[0] as u32) << 8*3) |
  36         ((v[1] as u32) << 8*2) |
  37         ((v[2] as u32) << 8*1) |
  38         ((v[3] as u32) << 8*0)
  39 }
  40
  41 #[inline]
  42 pub fn slice_to_be64(v: &[u8]) -> u64 {
  43         ((v[0] as u64) << 8*7) |
  44         ((v[1] as u64) << 8*6) |
  45         ((v[2] as u64) << 8*5) |
  46         ((v[3] as u64) << 8*4) |
  47         ((v[4] as u64) << 8*3) |
  48         ((v[5] as u64) << 8*2) |
  49         ((v[6] as u64) << 8*1) |
  50         ((v[7] as u64) << 8*0)
  51 }
  52
  53
  54 struct InputData {
  55         data: Vec<u8>,
  56         read_pos: AtomicUsize,
  57 }
  58 impl InputData {
  59         fn get_slice(&self, len: usize) -> Option<&[u8]> {
  60                 let old_pos = self.read_pos.fetch_add(len, Ordering::AcqRel);
  61                 if self.data.len() < old_pos + len {
  62                         return None;
  63                 }
  64                 Some(&self.data[old_pos..old_pos + len])
  65         }
  66         fn get_slice_nonadvancing(&self, len: usize) -> Option<&[u8]> {
  67                 let old_pos = self.read_pos.load(Ordering::Acquire);
  68                 if self.data.len() < old_pos + len {
  69                         return None;
  70                 }
  71                 Some(&self.data[old_pos..old_pos + len])
  72         }
  73 }
  74
  75 struct DummyChainWatcher {
  76         input: Arc<InputData>,
  77 }
  78
  79 impl ChainWatchInterface for DummyChainWatcher {
  80         fn install_watch_script(&self, _script_pub_key: &Script) { }
  81         fn install_watch_outpoint(&self, _outpoint: (Sha256dHash, u32), _out_script: &Script) { }
  82         fn watch_all_txn(&self) { }
  83         fn register_listener(&self, _listener: Weak<ChainListener>) { }
  84
  85         fn get_chain_utxo(&self, _genesis_hash: Sha256dHash, _unspent_tx_output_identifier: u64) -> Result<(Script, u64), ChainError> {
  86                 match self.input.get_slice(2) {
  87                         Some(&[0, _]) => Err(ChainError::NotSupported),
  88                         Some(&[1, _]) => Err(ChainError::NotWatched),
  89                         Some(&[2, _]) => Err(ChainError::UnknownTx),
  90                         Some(&[_, x]) => Ok((Builder::new().push_int(x as i64).into_script().to_v0_p2wsh(), 0)),
  91                         None => Err(ChainError::UnknownTx),
  92                         _ => unreachable!(),
  93                 }
  94         }
  95 }
  96
  97 #[inline]
  98 pub fn do_test(data: &[u8]) {
  99         reset_rng_state();
 100
 101         let input = Arc::new(InputData {
 102                 data: data.to_vec(),
 103                 read_pos: AtomicUsize::new(0),
 104         });
 105         macro_rules! get_slice_nonadvancing {
 106                 ($len: expr) => {
 107                         match input.get_slice_nonadvancing($len as usize) {
 108                                 Some(slice) => slice,
 109                                 None => return,
 110                         }
 111                 }
 112         }
 113         macro_rules! get_slice {
 114                 ($len: expr) => {
 115                         match input.get_slice($len as usize) {
 116                                 Some(slice) => slice,
 117                                 None => return,
 118                         }
 119                 }
 120         }
 121
 122         macro_rules! decode_msg {
 123                 ($MsgType: path, $len: expr) => {
 124                         match <($MsgType)>::decode(get_slice!($len)) {
 125                                 Ok(msg) => msg,
 126                                 Err(e) => match e {
 127                                         msgs::DecodeError::UnknownRealmByte => return,
 128                                         msgs::DecodeError::UnknownRequiredFeature => return,
 129                                         msgs::DecodeError::BadPublicKey => return,
 130                                         msgs::DecodeError::BadSignature => return,
 131                                         msgs::DecodeError::BadText => return,
 132                                         msgs::DecodeError::ExtraAddressesPerType => return,
 133                                         msgs::DecodeError::BadLengthDescriptor => return,
 134                                         msgs::DecodeError::ShortRead => panic!("We picked the length..."),
 135                                 }
 136                         }
 137                 }
 138         }
 139
 140         macro_rules! decode_msg_with_len16 {
 141                 ($MsgType: path, $begin_len: expr, $excess: expr) => {
 142                         {
 143                                 let extra_len = slice_to_be16(&get_slice_nonadvancing!($begin_len as usize + 2)[$begin_len..$begin_len + 2]);
 144                                 decode_msg!($MsgType, $begin_len as usize + 2 + (extra_len as usize) + $excess)
 145                         }
 146                 }
 147         }
 148
 149         let secp_ctx = Secp256k1::new();
 150         macro_rules! get_pubkey {
 151                 () => {
 152                         match PublicKey::from_slice(&secp_ctx, get_slice!(33)) {
 153                                 Ok(key) => key,
 154                                 Err(_) => return,
 155                         }
 156                 }
 157         }
 158
 159         let logger: Arc<Logger> = Arc::new(test_logger::TestLogger{});
 160         let chain_monitor = Arc::new(DummyChainWatcher {
 161                 input: Arc::clone(&input),
 162         });
 163
 164         let our_pubkey = get_pubkey!();
 165         let router = Router::new(our_pubkey.clone(), chain_monitor, Arc::clone(&logger));
 166
 167         loop {
 168                 match get_slice!(1)[0] {
 169                         0 => {
 170                                 let start_len = slice_to_be16(&get_slice_nonadvancing!(64 + 2)[64..64 + 2]) as usize;
 171                                 let addr_len = slice_to_be16(&get_slice_nonadvancing!(64+start_len+2 + 74)[64+start_len+2 + 72..64+start_len+2 + 74]);
 172                                 if addr_len > (37+1)*4 {
 173                                         return;
 174                                 }
 175                                 let _ = router.handle_node_announcement(&decode_msg_with_len16!(msgs::NodeAnnouncement, 64, 288));
 176                         },
 177                         1 => {
 178                                 let _ = router.handle_channel_announcement(&decode_msg_with_len16!(msgs::ChannelAnnouncement, 64*4, 32+8+33*4));
 179                         },
 180                         2 => {
 181                                 let _ = router.handle_channel_update(&decode_msg!(msgs::ChannelUpdate, 128));
 182                         },
 183                         3 => {
 184                                 match get_slice!(1)[0] {
 185                                         0 => {
 186                                                 router.handle_htlc_fail_channel_update(&msgs::HTLCFailChannelUpdate::ChannelUpdateMessage {msg: decode_msg!(msgs::ChannelUpdate, 128)});
 187                                         },
 188                                         1 => {
 189                                                 let short_channel_id = slice_to_be64(get_slice!(8));
 190                                                 router.handle_htlc_fail_channel_update(&msgs::HTLCFailChannelUpdate::ChannelClosed {short_channel_id});
 191                                         },
 192                                         _ => return,
 193                                 }
 194                         },
 195                         4 => {
 196                                 let target = get_pubkey!();
 197                                 let mut first_hops_vec = Vec::new();
 198                                 let first_hops = match get_slice!(1)[0] {
 199                                         0 => None,
 200                                         1 => {
 201                                                 let count = slice_to_be16(get_slice!(2));
 202                                                 for _ in 0..count {
 203                                                         first_hops_vec.push(ChannelDetails {
 204                                                                 channel_id: [0; 32],
 205                                                                 short_channel_id: Some(slice_to_be64(get_slice!(8))),
 206                                                                 remote_network_id: get_pubkey!(),
 207                                                                 channel_value_satoshis: slice_to_be64(get_slice!(8)),
 208                                                                 user_id: 0,
 209                                                         });
 210                                                 }
 211                                                 Some(&first_hops_vec[..])
 212                                         },
 213                                         _ => return,
 214                                 };
 215                                 let mut last_hops_vec = Vec::new();
 216                                 let last_hops = {
 217                                         let count = slice_to_be16(get_slice!(2));
 218                                         for _ in 0..count {
 219                                                 last_hops_vec.push(RouteHint {
 220                                                         src_node_id: get_pubkey!(),
 221                                                         short_channel_id: slice_to_be64(get_slice!(8)),
 222                                                         fee_base_msat: slice_to_be32(get_slice!(4)),
 223                                                         fee_proportional_millionths: slice_to_be32(get_slice!(4)),
 224                                                         cltv_expiry_delta: slice_to_be16(get_slice!(2)),
 225                                                         htlc_minimum_msat: slice_to_be64(get_slice!(8)),
 226                                                 });
 227                                         }
 228                                         &last_hops_vec[..]
 229                                 };
 230                                 let _ = router.get_route(&target, first_hops, last_hops, slice_to_be64(get_slice!(8)), slice_to_be32(get_slice!(4)));
 231                         },
 232                         _ => return,
 233                 }
 234         }
 235 }
 236
 237 #[cfg(feature = "afl")]
 238 #[macro_use] extern crate afl;
 239 #[cfg(feature = "afl")]
 240 fn main() {
 241         fuzz!(|data| {
 242                 do_test(data);
 243         });
 244 }
 245
 246 #[cfg(feature = "honggfuzz")]
 247 #[macro_use] extern crate honggfuzz;
 248 #[cfg(feature = "honggfuzz")]
 249 fn main() {
 250         loop {
 251                 fuzz!(|data| {
 252                         do_test(data);
 253                 });
 254         }
 255 }
 256
 257 extern crate hex;
 258 #[cfg(test)]
 259 mod tests {
 260
 261         #[test]
 262         fn duplicate_crash() {
 263                 super::do_test(&::hex::decode("00").unwrap());
 264         }
 265 }