_ 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::blockdata::script::Builder;
  11 use bitcoin::blockdata::transaction::TxOut;
  12 use bitcoin::hash_types::BlockHash;
  13
  14 use lightning::chain;
  15 use lightning::ln::channelmanager::ChannelDetails;
  16 use lightning::ln::features::InitFeatures;
  17 use lightning::ln::msgs;
  18 use lightning::ln::msgs::RoutingMessageHandler;
  19 use lightning::routing::router::{get_route, RouteHint};
  20 use lightning::util::logger::Logger;
  21 use lightning::util::ser::Readable;
  22 use lightning::routing::network_graph::{NetGraphMsgHandler, RoutingFees};
  23
  24 use bitcoin::secp256k1::key::PublicKey;
  25
  26 use utils::test_logger;
  27
  28 use std::sync::Arc;
  29 use std::sync::atomic::{AtomicUsize, Ordering};
  30
  31 #[inline]
  32 pub fn slice_to_be16(v: &[u8]) -> u16 {
  33         ((v[0] as u16) << 8*1) |
  34         ((v[1] as u16) << 8*0)
  35 }
  36
  37 #[inline]
  38 pub fn slice_to_be32(v: &[u8]) -> u32 {
  39         ((v[0] as u32) << 8*3) |
  40         ((v[1] as u32) << 8*2) |
  41         ((v[2] as u32) << 8*1) |
  42         ((v[3] as u32) << 8*0)
  43 }
  44
  45 #[inline]
  46 pub fn slice_to_be64(v: &[u8]) -> u64 {
  47         ((v[0] as u64) << 8*7) |
  48         ((v[1] as u64) << 8*6) |
  49         ((v[2] as u64) << 8*5) |
  50         ((v[3] as u64) << 8*4) |
  51         ((v[4] as u64) << 8*3) |
  52         ((v[5] as u64) << 8*2) |
  53         ((v[6] as u64) << 8*1) |
  54         ((v[7] as u64) << 8*0)
  55 }
  56
  57
  58 struct InputData {
  59         data: Vec<u8>,
  60         read_pos: AtomicUsize,
  61 }
  62 impl InputData {
  63         fn get_slice(&self, len: usize) -> Option<&[u8]> {
  64                 let old_pos = self.read_pos.fetch_add(len, Ordering::AcqRel);
  65                 if self.data.len() < old_pos + len {
  66                         return None;
  67                 }
  68                 Some(&self.data[old_pos..old_pos + len])
  69         }
  70         fn get_slice_nonadvancing(&self, len: usize) -> Option<&[u8]> {
  71                 let old_pos = self.read_pos.load(Ordering::Acquire);
  72                 if self.data.len() < old_pos + len {
  73                         return None;
  74                 }
  75                 Some(&self.data[old_pos..old_pos + len])
  76         }
  77 }
  78
  79 struct FuzzChainSource {
  80         input: Arc<InputData>,
  81 }
  82 impl chain::Access for FuzzChainSource {
  83         fn get_utxo(&self, _genesis_hash: &BlockHash, _short_channel_id: u64) -> Result<TxOut, chain::AccessError> {
  84                 match self.input.get_slice(2) {
  85                         Some(&[0, _]) => Err(chain::AccessError::UnknownChain),
  86                         Some(&[1, _]) => Err(chain::AccessError::UnknownTx),
  87                         Some(&[_, x]) => Ok(TxOut { value: 0, script_pubkey: Builder::new().push_int(x as i64).into_script().to_v0_p2wsh() }),
  88                         None => Err(chain::AccessError::UnknownTx),
  89                         _ => unreachable!(),
  90                 }
  91         }
  92 }
  93
  94 #[inline]
  95 pub fn do_test<Out: test_logger::Output>(data: &[u8], out: Out) {
  96         let input = Arc::new(InputData {
  97                 data: data.to_vec(),
  98                 read_pos: AtomicUsize::new(0),
  99         });
 100         macro_rules! get_slice_nonadvancing {
 101                 ($len: expr) => {
 102                         match input.get_slice_nonadvancing($len as usize) {
 103                                 Some(slice) => slice,
 104                                 None => return,
 105                         }
 106                 }
 107         }
 108         macro_rules! get_slice {
 109                 ($len: expr) => {
 110                         match input.get_slice($len as usize) {
 111                                 Some(slice) => slice,
 112                                 None => return,
 113                         }
 114                 }
 115         }
 116
 117         macro_rules! decode_msg {
 118                 ($MsgType: path, $len: expr) => {{
 119                         let mut reader = ::std::io::Cursor::new(get_slice!($len));
 120                         match <$MsgType>::read(&mut reader) {
 121                                 Ok(msg) => msg,
 122                                 Err(e) => match e {
 123                                         msgs::DecodeError::UnknownVersion => return,
 124                                         msgs::DecodeError::UnknownRequiredFeature => return,
 125                                         msgs::DecodeError::InvalidValue => return,
 126                                         msgs::DecodeError::BadLengthDescriptor => return,
 127                                         msgs::DecodeError::ShortRead => panic!("We picked the length..."),
 128                                         msgs::DecodeError::Io(e) => panic!(format!("{}", e)),
 129                                 }
 130                         }
 131                 }}
 132         }
 133
 134         macro_rules! decode_msg_with_len16 {
 135                 ($MsgType: path, $begin_len: expr, $excess: expr) => {
 136                         {
 137                                 let extra_len = slice_to_be16(&get_slice_nonadvancing!($begin_len as usize + 2)[$begin_len..$begin_len + 2]);
 138                                 decode_msg!($MsgType, $begin_len as usize + 2 + (extra_len as usize) + $excess)
 139                         }
 140                 }
 141         }
 142
 143         macro_rules! get_pubkey {
 144                 () => {
 145                         match PublicKey::from_slice(get_slice!(33)) {
 146                                 Ok(key) => key,
 147                                 Err(_) => return,
 148                         }
 149                 }
 150         }
 151
 152         let logger: Arc<dyn Logger> = Arc::new(test_logger::TestLogger::new("".to_owned(), out));
 153         let chain_source = if get_slice!(1)[0] % 2 == 0 {
 154                 None
 155         } else {
 156                 Some(Arc::new(FuzzChainSource {
 157                         input: Arc::clone(&input),
 158                 }))
 159         };
 160
 161         let our_pubkey = get_pubkey!();
 162         let net_graph_msg_handler = NetGraphMsgHandler::new(chain_source, Arc::clone(&logger));
 163
 164         loop {
 165                 match get_slice!(1)[0] {
 166                         0 => {
 167                                 let start_len = slice_to_be16(&get_slice_nonadvancing!(64 + 2)[64..64 + 2]) as usize;
 168                                 let addr_len = slice_to_be16(&get_slice_nonadvancing!(64+start_len+2 + 74)[64+start_len+2 + 72..64+start_len+2 + 74]);
 169                                 if addr_len > (37+1)*4 {
 170                                         return;
 171                                 }
 172                                 let _ = net_graph_msg_handler.handle_node_announcement(&decode_msg_with_len16!(msgs::NodeAnnouncement, 64, 288));
 173                         },
 174                         1 => {
 175                                 let _ = net_graph_msg_handler.handle_channel_announcement(&decode_msg_with_len16!(msgs::ChannelAnnouncement, 64*4, 32+8+33*4));
 176                         },
 177                         2 => {
 178                                 let _ = net_graph_msg_handler.handle_channel_update(&decode_msg!(msgs::ChannelUpdate, 136));
 179                         },
 180                         3 => {
 181                                 match get_slice!(1)[0] {
 182                                         0 => {
 183                                                 net_graph_msg_handler.handle_htlc_fail_channel_update(&msgs::HTLCFailChannelUpdate::ChannelUpdateMessage {msg: decode_msg!(msgs::ChannelUpdate, 136)});
 184                                         },
 185                                         1 => {
 186                                                 let short_channel_id = slice_to_be64(get_slice!(8));
 187                                                 net_graph_msg_handler.handle_htlc_fail_channel_update(&msgs::HTLCFailChannelUpdate::ChannelClosed {short_channel_id, is_permanent: false});
 188                                         },
 189                                         _ => return,
 190                                 }
 191                         },
 192                         4 => {
 193                                 let target = get_pubkey!();
 194                                 let mut first_hops_vec = Vec::new();
 195                                 let first_hops = match get_slice!(1)[0] {
 196                                         0 => None,
 197                                         1 => {
 198                                                 let count = slice_to_be16(get_slice!(2));
 199                                                 for _ in 0..count {
 200                                                         first_hops_vec.push(ChannelDetails {
 201                                                                 channel_id: [0; 32],
 202                                                                 short_channel_id: Some(slice_to_be64(get_slice!(8))),
 203                                                                 remote_network_id: get_pubkey!(),
 204                                                                 counterparty_features: InitFeatures::empty(),
 205                                                                 channel_value_satoshis: slice_to_be64(get_slice!(8)),
 206                                                                 user_id: 0,
 207                                                                 inbound_capacity_msat: 0,
 208                                                                 is_live: true,
 209                                                                 outbound_capacity_msat: 0,
 210                                                         });
 211                                                 }
 212                                                 Some(&first_hops_vec[..])
 213                                         },
 214                                         _ => return,
 215                                 };
 216                                 let mut last_hops_vec = Vec::new();
 217                                 let last_hops = {
 218                                         let count = slice_to_be16(get_slice!(2));
 219                                         for _ in 0..count {
 220                                                 last_hops_vec.push(RouteHint {
 221                                                         src_node_id: get_pubkey!(),
 222                                                         short_channel_id: slice_to_be64(get_slice!(8)),
 223                                                         fees: RoutingFees {
 224                                                                 base_msat: slice_to_be32(get_slice!(4)),
 225                                                                 proportional_millionths: slice_to_be32(get_slice!(4)),
 226                                                         },
 227                                                         cltv_expiry_delta: slice_to_be16(get_slice!(2)),
 228                                                         htlc_minimum_msat: slice_to_be64(get_slice!(8)),
 229                                                 });
 230                                         }
 231                                         &last_hops_vec[..]
 232                                 };
 233                                 let _ = get_route(&our_pubkey, &net_graph_msg_handler.network_graph.read().unwrap(), &target,
 234                                         first_hops.map(|c| c.iter().collect::<Vec<_>>()).as_ref().map(|a| a.as_slice()),
 235                                         &last_hops.iter().collect::<Vec<_>>(),
 236                                         slice_to_be64(get_slice!(8)), slice_to_be32(get_slice!(4)), Arc::clone(&logger));
 237                         },
 238                         _ => return,
 239                 }
 240         }
 241 }
 242
 243 pub fn router_test<Out: test_logger::Output>(data: &[u8], out: Out) {
 244         do_test(data, out);
 245 }
 246
 247 #[no_mangle]
 248 pub extern "C" fn router_run(data: *const u8, datalen: usize) {
 249         do_test(unsafe { std::slice::from_raw_parts(data, datalen) }, test_logger::DevNull {});
 250 }