_ Git - rust-lightning/blob - lightning/src/ln/peer_channel_encryptor.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 prelude::*;
  11
  12 use ln::msgs::LightningError;
  13 use ln::msgs;
  14
  15 use bitcoin::hashes::{Hash, HashEngine};
  16 use bitcoin::hashes::sha256::Hash as Sha256;
  17
  18 use bitcoin::secp256k1::Secp256k1;
  19 use bitcoin::secp256k1::key::{PublicKey,SecretKey};
  20 use bitcoin::secp256k1::ecdh::SharedSecret;
  21 use bitcoin::secp256k1;
  22
  23 use util::chacha20poly1305rfc::ChaCha20Poly1305RFC;
  24 use util::crypto::hkdf_extract_expand_twice;
  25 use bitcoin::hashes::hex::ToHex;
  26
  27 /// Maximum Lightning message data length according to
  28 /// [BOLT-8](https://github.com/lightningnetwork/lightning-rfc/blob/v1.0/08-transport.md#lightning-message-specification)
  29 /// and [BOLT-1](https://github.com/lightningnetwork/lightning-rfc/blob/master/01-messaging.md#lightning-message-format):
  30 pub const LN_MAX_MSG_LEN: usize = ::core::u16::MAX as usize; // Must be equal to 65535
  31
  32 // Sha256("Noise_XK_secp256k1_ChaChaPoly_SHA256")
  33 const NOISE_CK: [u8; 32] = [0x26, 0x40, 0xf5, 0x2e, 0xeb, 0xcd, 0x9e, 0x88, 0x29, 0x58, 0x95, 0x1c, 0x79, 0x42, 0x50, 0xee, 0xdb, 0x28, 0x00, 0x2c, 0x05, 0xd7, 0xdc, 0x2e, 0xa0, 0xf1, 0x95, 0x40, 0x60, 0x42, 0xca, 0xf1];
  34 // Sha256(NOISE_CK || "lightning")
  35 const NOISE_H: [u8; 32] = [0xd1, 0xfb, 0xf6, 0xde, 0xe4, 0xf6, 0x86, 0xf1, 0x32, 0xfd, 0x70, 0x2c, 0x4a, 0xbf, 0x8f, 0xba, 0x4b, 0xb4, 0x20, 0xd8, 0x9d, 0x2a, 0x04, 0x8a, 0x3c, 0x4f, 0x4c, 0x09, 0x2e, 0x37, 0xb6, 0x76];
  36
  37 pub enum NextNoiseStep {
  38         ActOne,
  39         ActTwo,
  40         ActThree,
  41         NoiseComplete,
  42 }
  43
  44 #[derive(PartialEq)]
  45 enum NoiseStep {
  46         PreActOne,
  47         PostActOne,
  48         PostActTwo,
  49         // When done swap noise_state for NoiseState::Finished
  50 }
  51
  52 struct BidirectionalNoiseState {
  53         h: [u8; 32],
  54         ck: [u8; 32],
  55 }
  56 enum DirectionalNoiseState {
  57         Outbound {
  58                 ie: SecretKey,
  59         },
  60         Inbound {
  61                 ie: Option<PublicKey>, // filled in if state >= PostActOne
  62                 re: Option<SecretKey>, // filled in if state >= PostActTwo
  63                 temp_k2: Option<[u8; 32]>, // filled in if state >= PostActTwo
  64         }
  65 }
  66 enum NoiseState {
  67         InProgress {
  68                 state: NoiseStep,
  69                 directional_state: DirectionalNoiseState,
  70                 bidirectional_state: BidirectionalNoiseState,
  71         },
  72         Finished {
  73                 sk: [u8; 32],
  74                 sn: u64,
  75                 sck: [u8; 32],
  76                 rk: [u8; 32],
  77                 rn: u64,
  78                 rck: [u8; 32],
  79         }
  80 }
  81
  82 pub struct PeerChannelEncryptor {
  83         secp_ctx: Secp256k1<secp256k1::SignOnly>,
  84         their_node_id: Option<PublicKey>, // filled in for outbound, or inbound after noise_state is Finished
  85
  86         noise_state: NoiseState,
  87 }
  88
  89 impl PeerChannelEncryptor {
  90         pub fn new_outbound(their_node_id: PublicKey, ephemeral_key: SecretKey) -> PeerChannelEncryptor {
  91                 let secp_ctx = Secp256k1::signing_only();
  92
  93                 let mut sha = Sha256::engine();
  94                 sha.input(&NOISE_H);
  95                 sha.input(&their_node_id.serialize()[..]);
  96                 let h = Sha256::from_engine(sha).into_inner();
  97
  98                 PeerChannelEncryptor {
  99                         their_node_id: Some(their_node_id),
 100                         secp_ctx,
 101                         noise_state: NoiseState::InProgress {
 102                                 state: NoiseStep::PreActOne,
 103                                 directional_state: DirectionalNoiseState::Outbound {
 104                                         ie: ephemeral_key,
 105                                 },
 106                                 bidirectional_state: BidirectionalNoiseState {
 107                                         h,
 108                                         ck: NOISE_CK,
 109                                 },
 110                         }
 111                 }
 112         }
 113
 114         pub fn new_inbound(our_node_secret: &SecretKey) -> PeerChannelEncryptor {
 115                 let secp_ctx = Secp256k1::signing_only();
 116
 117                 let mut sha = Sha256::engine();
 118                 sha.input(&NOISE_H);
 119                 let our_node_id = PublicKey::from_secret_key(&secp_ctx, our_node_secret);
 120                 sha.input(&our_node_id.serialize()[..]);
 121                 let h = Sha256::from_engine(sha).into_inner();
 122
 123                 PeerChannelEncryptor {
 124                         their_node_id: None,
 125                         secp_ctx,
 126                         noise_state: NoiseState::InProgress {
 127                                 state: NoiseStep::PreActOne,
 128                                 directional_state: DirectionalNoiseState::Inbound {
 129                                         ie: None,
 130                                         re: None,
 131                                         temp_k2: None,
 132                                 },
 133                                 bidirectional_state: BidirectionalNoiseState {
 134                                         h,
 135                                         ck: NOISE_CK,
 136                                 },
 137                         }
 138                 }
 139         }
 140
 141         #[inline]
 142         fn encrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], plaintext: &[u8]) {
 143                 let mut nonce = [0; 12];
 144                 nonce[4..].copy_from_slice(&n.to_le_bytes()[..]);
 145
 146                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 147                 let mut tag = [0; 16];
 148                 chacha.encrypt(plaintext, &mut res[0..plaintext.len()], &mut tag);
 149                 res[plaintext.len()..].copy_from_slice(&tag);
 150         }
 151
 152         #[inline]
 153         fn decrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], cyphertext: &[u8]) -> Result<(), LightningError> {
 154                 let mut nonce = [0; 12];
 155                 nonce[4..].copy_from_slice(&n.to_le_bytes()[..]);
 156
 157                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 158                 if !chacha.decrypt(&cyphertext[0..cyphertext.len() - 16], res, &cyphertext[cyphertext.len() - 16..]) {
 159                         return Err(LightningError{err: "Bad MAC".to_owned(), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 160                 }
 161                 Ok(())
 162         }
 163
 164         #[inline]
 165         fn hkdf(state: &mut BidirectionalNoiseState, ss: SharedSecret) -> [u8; 32] {
 166                 let (t1, t2) = hkdf_extract_expand_twice(&state.ck, &ss[..]);
 167                 state.ck = t1;
 168                 t2
 169         }
 170
 171         #[inline]
 172         fn outbound_noise_act<T: secp256k1::Signing>(secp_ctx: &Secp256k1<T>, state: &mut BidirectionalNoiseState, our_key: &SecretKey, their_key: &PublicKey) -> ([u8; 50], [u8; 32]) {
 173                 let our_pub = PublicKey::from_secret_key(secp_ctx, &our_key);
 174
 175                 let mut sha = Sha256::engine();
 176                 sha.input(&state.h);
 177                 sha.input(&our_pub.serialize()[..]);
 178                 state.h = Sha256::from_engine(sha).into_inner();
 179
 180                 let ss = SharedSecret::new(&their_key, &our_key);
 181                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 182
 183                 let mut res = [0; 50];
 184                 res[1..34].copy_from_slice(&our_pub.serialize()[..]);
 185                 PeerChannelEncryptor::encrypt_with_ad(&mut res[34..], 0, &temp_k, &state.h, &[0; 0]);
 186
 187                 let mut sha = Sha256::engine();
 188                 sha.input(&state.h);
 189                 sha.input(&res[34..]);
 190                 state.h = Sha256::from_engine(sha).into_inner();
 191
 192                 (res, temp_k)
 193         }
 194
 195         #[inline]
 196         fn inbound_noise_act(state: &mut BidirectionalNoiseState, act: &[u8], our_key: &SecretKey) -> Result<(PublicKey, [u8; 32]), LightningError> {
 197                 assert_eq!(act.len(), 50);
 198
 199                 if act[0] != 0 {
 200                         return Err(LightningError{err: format!("Unknown handshake version number {}", act[0]), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 201                 }
 202
 203                 let their_pub = match PublicKey::from_slice(&act[1..34]) {
 204                         Err(_) => return Err(LightningError{err: format!("Invalid public key {}", &act[1..34].to_hex()), action: msgs::ErrorAction::DisconnectPeer{ msg: None }}),
 205                         Ok(key) => key,
 206                 };
 207
 208                 let mut sha = Sha256::engine();
 209                 sha.input(&state.h);
 210                 sha.input(&their_pub.serialize()[..]);
 211                 state.h = Sha256::from_engine(sha).into_inner();
 212
 213                 let ss = SharedSecret::new(&their_pub, &our_key);
 214                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 215
 216                 let mut dec = [0; 0];
 217                 PeerChannelEncryptor::decrypt_with_ad(&mut dec, 0, &temp_k, &state.h, &act[34..])?;
 218
 219                 let mut sha = Sha256::engine();
 220                 sha.input(&state.h);
 221                 sha.input(&act[34..]);
 222                 state.h = Sha256::from_engine(sha).into_inner();
 223
 224                 Ok((their_pub, temp_k))
 225         }
 226
 227         pub fn get_act_one(&mut self) -> [u8; 50] {
 228                 match self.noise_state {
 229                         NoiseState::InProgress { ref mut state, ref directional_state, ref mut bidirectional_state } =>
 230                                 match directional_state {
 231                                         &DirectionalNoiseState::Outbound { ref ie } => {
 232                                                 if *state != NoiseStep::PreActOne {
 233                                                         panic!("Requested act at wrong step");
 234                                                 }
 235
 236                                                 let (res, _) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &ie, &self.their_node_id.unwrap());
 237                                                 *state = NoiseStep::PostActOne;
 238                                                 res
 239                                         },
 240                                         _ => panic!("Wrong direction for act"),
 241                                 },
 242                         _ => panic!("Cannot get act one after noise handshake completes"),
 243                 }
 244         }
 245
 246         pub fn process_act_one_with_keys(&mut self, act_one: &[u8], our_node_secret: &SecretKey, our_ephemeral: SecretKey) -> Result<[u8; 50], LightningError> {
 247                 assert_eq!(act_one.len(), 50);
 248
 249                 match self.noise_state {
 250                         NoiseState::InProgress { ref mut state, ref mut directional_state, ref mut bidirectional_state } =>
 251                                 match directional_state {
 252                                         &mut DirectionalNoiseState::Inbound { ref mut ie, ref mut re, ref mut temp_k2 } => {
 253                                                 if *state != NoiseStep::PreActOne {
 254                                                         panic!("Requested act at wrong step");
 255                                                 }
 256
 257                                                 let (their_pub, _) = PeerChannelEncryptor::inbound_noise_act(bidirectional_state, act_one, &our_node_secret)?;
 258                                                 ie.get_or_insert(their_pub);
 259
 260                                                 re.get_or_insert(our_ephemeral);
 261
 262                                                 let (res, temp_k) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &re.unwrap(), &ie.unwrap());
 263                                                 *temp_k2 = Some(temp_k);
 264                                                 *state = NoiseStep::PostActTwo;
 265                                                 Ok(res)
 266                                         },
 267                                         _ => panic!("Wrong direction for act"),
 268                                 },
 269                         _ => panic!("Cannot get act one after noise handshake completes"),
 270                 }
 271         }
 272
 273         pub fn process_act_two(&mut self, act_two: &[u8], our_node_secret: &SecretKey) -> Result<([u8; 66], PublicKey), LightningError> {
 274                 assert_eq!(act_two.len(), 50);
 275
 276                 let final_hkdf;
 277                 let ck;
 278                 let res: [u8; 66] = match self.noise_state {
 279                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 280                                 match directional_state {
 281                                         &DirectionalNoiseState::Outbound { ref ie } => {
 282                                                 if *state != NoiseStep::PostActOne {
 283                                                         panic!("Requested act at wrong step");
 284                                                 }
 285
 286                                                 let (re, temp_k2) = PeerChannelEncryptor::inbound_noise_act(bidirectional_state, act_two, &ie)?;
 287
 288                                                 let mut res = [0; 66];
 289                                                 let our_node_id = PublicKey::from_secret_key(&self.secp_ctx, &our_node_secret);
 290
 291                                                 PeerChannelEncryptor::encrypt_with_ad(&mut res[1..50], 1, &temp_k2, &bidirectional_state.h, &our_node_id.serialize()[..]);
 292
 293                                                 let mut sha = Sha256::engine();
 294                                                 sha.input(&bidirectional_state.h);
 295                                                 sha.input(&res[1..50]);
 296                                                 bidirectional_state.h = Sha256::from_engine(sha).into_inner();
 297
 298                                                 let ss = SharedSecret::new(&re, our_node_secret);
 299                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 300
 301                                                 PeerChannelEncryptor::encrypt_with_ad(&mut res[50..], 0, &temp_k, &bidirectional_state.h, &[0; 0]);
 302                                                 final_hkdf = hkdf_extract_expand_twice(&bidirectional_state.ck, &[0; 0]);
 303                                                 ck = bidirectional_state.ck.clone();
 304                                                 res
 305                                         },
 306                                         _ => panic!("Wrong direction for act"),
 307                                 },
 308                         _ => panic!("Cannot get act one after noise handshake completes"),
 309                 };
 310
 311                 let (sk, rk) = final_hkdf;
 312                 self.noise_state = NoiseState::Finished {
 313                         sk,
 314                         sn: 0,
 315                         sck: ck.clone(),
 316                         rk,
 317                         rn: 0,
 318                         rck: ck,
 319                 };
 320
 321                 Ok((res, self.their_node_id.unwrap().clone()))
 322         }
 323
 324         pub fn process_act_three(&mut self, act_three: &[u8]) -> Result<PublicKey, LightningError> {
 325                 assert_eq!(act_three.len(), 66);
 326
 327                 let final_hkdf;
 328                 let ck;
 329                 match self.noise_state {
 330                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 331                                 match directional_state {
 332                                         &DirectionalNoiseState::Inbound { ie: _, ref re, ref temp_k2 } => {
 333                                                 if *state != NoiseStep::PostActTwo {
 334                                                         panic!("Requested act at wrong step");
 335                                                 }
 336                                                 if act_three[0] != 0 {
 337                                                         return Err(LightningError{err: format!("Unknown handshake version number {}", act_three[0]), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 338                                                 }
 339
 340                                                 let mut their_node_id = [0; 33];
 341                                                 PeerChannelEncryptor::decrypt_with_ad(&mut their_node_id, 1, &temp_k2.unwrap(), &bidirectional_state.h, &act_three[1..50])?;
 342                                                 self.their_node_id = Some(match PublicKey::from_slice(&their_node_id) {
 343                                                         Ok(key) => key,
 344                                                         Err(_) => return Err(LightningError{err: format!("Bad node_id from peer, {}", &their_node_id.to_hex()), action: msgs::ErrorAction::DisconnectPeer{ msg: None }}),
 345                                                 });
 346
 347                                                 let mut sha = Sha256::engine();
 348                                                 sha.input(&bidirectional_state.h);
 349                                                 sha.input(&act_three[1..50]);
 350                                                 bidirectional_state.h = Sha256::from_engine(sha).into_inner();
 351
 352                                                 let ss = SharedSecret::new(&self.their_node_id.unwrap(), &re.unwrap());
 353                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 354
 355                                                 PeerChannelEncryptor::decrypt_with_ad(&mut [0; 0], 0, &temp_k, &bidirectional_state.h, &act_three[50..])?;
 356                                                 final_hkdf = hkdf_extract_expand_twice(&bidirectional_state.ck, &[0; 0]);
 357                                                 ck = bidirectional_state.ck.clone();
 358                                         },
 359                                         _ => panic!("Wrong direction for act"),
 360                                 },
 361                         _ => panic!("Cannot get act one after noise handshake completes"),
 362                 }
 363
 364                 let (rk, sk) = final_hkdf;
 365                 self.noise_state = NoiseState::Finished {
 366                         sk,
 367                         sn: 0,
 368                         sck: ck.clone(),
 369                         rk,
 370                         rn: 0,
 371                         rck: ck,
 372                 };
 373
 374                 Ok(self.their_node_id.unwrap().clone())
 375         }
 376
 377         /// Encrypts the given message, returning the encrypted version
 378         /// panics if msg.len() > 65535 or Noise handshake has not finished.
 379         pub fn encrypt_message(&mut self, msg: &[u8]) -> Vec<u8> {
 380                 if msg.len() > LN_MAX_MSG_LEN {
 381                         panic!("Attempted to encrypt message longer than 65535 bytes!");
 382                 }
 383
 384                 let mut res = Vec::with_capacity(msg.len() + 16*2 + 2);
 385                 res.resize(msg.len() + 16*2 + 2, 0);
 386
 387                 match self.noise_state {
 388                         NoiseState::Finished { ref mut sk, ref mut sn, ref mut sck, rk: _, rn: _, rck: _ } => {
 389                                 if *sn >= 1000 {
 390                                         let (new_sck, new_sk) = hkdf_extract_expand_twice(sck, sk);
 391                                         *sck = new_sck;
 392                                         *sk = new_sk;
 393                                         *sn = 0;
 394                                 }
 395
 396                                 Self::encrypt_with_ad(&mut res[0..16+2], *sn, sk, &[0; 0], &(msg.len() as u16).to_be_bytes());
 397                                 *sn += 1;
 398
 399                                 Self::encrypt_with_ad(&mut res[16+2..], *sn, sk, &[0; 0], msg);
 400                                 *sn += 1;
 401                         },
 402                         _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
 403                 }
 404
 405                 res
 406         }
 407
 408         /// Decrypts a message length header from the remote peer.
 409         /// panics if noise handshake has not yet finished or msg.len() != 18
 410         pub fn decrypt_length_header(&mut self, msg: &[u8]) -> Result<u16, LightningError> {
 411                 assert_eq!(msg.len(), 16+2);
 412
 413                 match self.noise_state {
 414                         NoiseState::Finished { sk: _, sn: _, sck: _, ref mut rk, ref mut rn, ref mut rck } => {
 415                                 if *rn >= 1000 {
 416                                         let (new_rck, new_rk) = hkdf_extract_expand_twice(rck, rk);
 417                                         *rck = new_rck;
 418                                         *rk = new_rk;
 419                                         *rn = 0;
 420                                 }
 421
 422                                 let mut res = [0; 2];
 423                                 Self::decrypt_with_ad(&mut res, *rn, rk, &[0; 0], msg)?;
 424                                 *rn += 1;
 425                                 Ok(u16::from_be_bytes(res))
 426                         },
 427                         _ => panic!("Tried to decrypt a message prior to noise handshake completion"),
 428                 }
 429         }
 430
 431         /// Decrypts the given message.
 432         /// panics if msg.len() > 65535 + 16
 433         pub fn decrypt_message(&mut self, msg: &[u8]) -> Result<Vec<u8>, LightningError> {
 434                 if msg.len() > LN_MAX_MSG_LEN + 16 {
 435                         panic!("Attempted to decrypt message longer than 65535 + 16 bytes!");
 436                 }
 437
 438                 match self.noise_state {
 439                         NoiseState::Finished { sk: _, sn: _, sck: _, ref rk, ref mut rn, rck: _ } => {
 440                                 let mut res = Vec::with_capacity(msg.len() - 16);
 441                                 res.resize(msg.len() - 16, 0);
 442                                 Self::decrypt_with_ad(&mut res[..], *rn, rk, &[0; 0], msg)?;
 443                                 *rn += 1;
 444
 445                                 Ok(res)
 446                         },
 447                         _ => panic!("Tried to decrypt a message prior to noise handshake completion"),
 448                 }
 449         }
 450
 451         pub fn get_noise_step(&self) -> NextNoiseStep {
 452                 match self.noise_state {
 453                         NoiseState::InProgress {ref state, ..} => {
 454                                 match state {
 455                                         &NoiseStep::PreActOne => NextNoiseStep::ActOne,
 456                                         &NoiseStep::PostActOne => NextNoiseStep::ActTwo,
 457                                         &NoiseStep::PostActTwo => NextNoiseStep::ActThree,
 458                                 }
 459                         },
 460                         NoiseState::Finished {..} => NextNoiseStep::NoiseComplete,
 461                 }
 462         }
 463
 464         pub fn is_ready_for_encryption(&self) -> bool {
 465                 match self.noise_state {
 466                         NoiseState::InProgress {..} => { false },
 467                         NoiseState::Finished {..} => { true }
 468                 }
 469         }
 470 }
 471
 472 #[cfg(test)]
 473 mod tests {
 474         use super::LN_MAX_MSG_LEN;
 475
 476         use bitcoin::secp256k1::key::{PublicKey,SecretKey};
 477
 478         use hex;
 479
 480         use ln::peer_channel_encryptor::{PeerChannelEncryptor,NoiseState};
 481
 482         fn get_outbound_peer_for_initiator_test_vectors() -> PeerChannelEncryptor {
 483                 let their_node_id = PublicKey::from_slice(&hex::decode("028d7500dd4c12685d1f568b4c2b5048e8534b873319f3a8daa612b469132ec7f7").unwrap()[..]).unwrap();
 484
 485                 let mut outbound_peer = PeerChannelEncryptor::new_outbound(their_node_id, SecretKey::from_slice(&hex::decode("1212121212121212121212121212121212121212121212121212121212121212").unwrap()[..]).unwrap());
 486                 assert_eq!(outbound_peer.get_act_one()[..], hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap()[..]);
 487                 outbound_peer
 488         }
 489
 490         fn get_inbound_peer_for_test_vectors() -> PeerChannelEncryptor {
 491                 // transport-responder successful handshake
 492                 let our_node_id = SecretKey::from_slice(&hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 493                 let our_ephemeral = SecretKey::from_slice(&hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 494
 495                 let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 496
 497                 let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 498                 assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 499
 500                 let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 501                 // test vector doesn't specify the initiator static key, but it's the same as the one
 502                 // from transport-initiator successful handshake
 503                 assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex::decode("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]);
 504
 505                 match inbound_peer.noise_state {
 506                         NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 507                                 assert_eq!(sk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 508                                 assert_eq!(sn, 0);
 509                                 assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 510                                 assert_eq!(rk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 511                                 assert_eq!(rn, 0);
 512                                 assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 513                         },
 514                         _ => panic!()
 515                 }
 516
 517                 inbound_peer
 518         }
 519
 520         #[test]
 521         fn noise_initiator_test_vectors() {
 522                 let our_node_id = SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 523
 524                 {
 525                         // transport-initiator successful handshake
 526                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 527
 528                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 529                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 530
 531                         match outbound_peer.noise_state {
 532                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 533                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 534                                         assert_eq!(sn, 0);
 535                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 536                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 537                                         assert_eq!(rn, 0);
 538                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 539                                 },
 540                                 _ => panic!()
 541                         }
 542                 }
 543                 {
 544                         // transport-initiator act2 short read test
 545                         // Can't actually test this cause process_act_two requires you pass the right length!
 546                 }
 547                 {
 548                         // transport-initiator act2 bad version test
 549                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 550
 551                         let act_two = hex::decode("0102466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 552                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 553                 }
 554
 555                 {
 556                         // transport-initiator act2 bad key serialization test
 557                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 558
 559                         let act_two = hex::decode("0004466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 560                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 561                 }
 562
 563                 {
 564                         // transport-initiator act2 bad MAC test
 565                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 566
 567                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730af").unwrap().to_vec();
 568                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 569                 }
 570         }
 571
 572         #[test]
 573         fn noise_responder_test_vectors() {
 574                 let our_node_id = SecretKey::from_slice(&hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 575                 let our_ephemeral = SecretKey::from_slice(&hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 576
 577                 {
 578                         let _ = get_inbound_peer_for_test_vectors();
 579                 }
 580                 {
 581                         // transport-responder act1 short read test
 582                         // Can't actually test this cause process_act_one requires you pass the right length!
 583                 }
 584                 {
 585                         // transport-responder act1 bad version test
 586                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 587
 588                         let act_one = hex::decode("01036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 589                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 590                 }
 591                 {
 592                         // transport-responder act1 bad key serialization test
 593                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 594
 595                         let act_one =hex::decode("00046360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 596                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 597                 }
 598                 {
 599                         // transport-responder act1 bad MAC test
 600                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 601
 602                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6b").unwrap().to_vec();
 603                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 604                 }
 605                 {
 606                         // transport-responder act3 bad version test
 607                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 608
 609                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 610                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 611
 612                         let act_three = hex::decode("01b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 613                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 614                 }
 615                 {
 616                         // transport-responder act3 short read test
 617                         // Can't actually test this cause process_act_three requires you pass the right length!
 618                 }
 619                 {
 620                         // transport-responder act3 bad MAC for ciphertext test
 621                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 622
 623                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 624                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 625
 626                         let act_three = hex::decode("00c9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 627                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 628                 }
 629                 {
 630                         // transport-responder act3 bad rs test
 631                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 632
 633                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 634                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 635
 636                         let act_three = hex::decode("00bfe3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa2235536ad09a8ee351870c2bb7f78b754a26c6cef79a98d25139c856d7efd252c2ae73c").unwrap().to_vec();
 637                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 638                 }
 639                 {
 640                         // transport-responder act3 bad MAC test
 641                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 642
 643                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 644                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 645
 646                         let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139bb").unwrap().to_vec();
 647                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 648                 }
 649         }
 650
 651
 652         #[test]
 653         fn message_encryption_decryption_test_vectors() {
 654                 // We use the same keys as the initiator and responder test vectors, so we copy those tests
 655                 // here and use them to encrypt.
 656                 let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 657
 658                 {
 659                         let our_node_id = SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 660
 661                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 662                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 663
 664                         match outbound_peer.noise_state {
 665                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 666                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 667                                         assert_eq!(sn, 0);
 668                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 669                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 670                                         assert_eq!(rn, 0);
 671                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 672                                 },
 673                                 _ => panic!()
 674                         }
 675                 }
 676
 677                 let mut inbound_peer = get_inbound_peer_for_test_vectors();
 678
 679                 for i in 0..1005 {
 680                         let msg = [0x68, 0x65, 0x6c, 0x6c, 0x6f];
 681                         let res = outbound_peer.encrypt_message(&msg);
 682                         assert_eq!(res.len(), 5 + 2*16 + 2);
 683
 684                         let len_header = res[0..2+16].to_vec();
 685                         assert_eq!(inbound_peer.decrypt_length_header(&len_header[..]).unwrap() as usize, msg.len());
 686                         assert_eq!(inbound_peer.decrypt_message(&res[2+16..]).unwrap()[..], msg[..]);
 687
 688                         if i == 0 {
 689                                 assert_eq!(res, hex::decode("cf2b30ddf0cf3f80e7c35a6e6730b59fe802473180f396d88a8fb0db8cbcf25d2f214cf9ea1d95").unwrap());
 690                         } else if i == 1 {
 691                                 assert_eq!(res, hex::decode("72887022101f0b6753e0c7de21657d35a4cb2a1f5cde2650528bbc8f837d0f0d7ad833b1a256a1").unwrap());
 692                         } else if i == 500 {
 693                                 assert_eq!(res, hex::decode("178cb9d7387190fa34db9c2d50027d21793c9bc2d40b1e14dcf30ebeeeb220f48364f7a4c68bf8").unwrap());
 694                         } else if i == 501 {
 695                                 assert_eq!(res, hex::decode("1b186c57d44eb6de4c057c49940d79bb838a145cb528d6e8fd26dbe50a60ca2c104b56b60e45bd").unwrap());
 696                         } else if i == 1000 {
 697                                 assert_eq!(res, hex::decode("4a2f3cc3b5e78ddb83dcb426d9863d9d9a723b0337c89dd0b005d89f8d3c05c52b76b29b740f09").unwrap());
 698                         } else if i == 1001 {
 699                                 assert_eq!(res, hex::decode("2ecd8c8a5629d0d02ab457a0fdd0f7b90a192cd46be5ecb6ca570bfc5e268338b1a16cf4ef2d36").unwrap());
 700                         }
 701                 }
 702         }
 703
 704         #[test]
 705         fn max_msg_len_limit_value() {
 706                 assert_eq!(LN_MAX_MSG_LEN, 65535);
 707                 assert_eq!(LN_MAX_MSG_LEN, ::core::u16::MAX as usize);
 708         }
 709
 710         #[test]
 711         #[should_panic(expected = "Attempted to encrypt message longer than 65535 bytes!")]
 712         fn max_message_len_encryption() {
 713                 let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 714                 let msg = [4u8; LN_MAX_MSG_LEN + 1];
 715                 outbound_peer.encrypt_message(&msg);
 716         }
 717
 718         #[test]
 719         #[should_panic(expected = "Attempted to decrypt message longer than 65535 + 16 bytes!")]
 720         fn max_message_len_decryption() {
 721                 let mut inbound_peer = get_inbound_peer_for_test_vectors();
 722
 723                 // MSG should not exceed LN_MAX_MSG_LEN + 16
 724                 let msg = [4u8; LN_MAX_MSG_LEN + 17];
 725                 inbound_peer.decrypt_message(&msg).unwrap();
 726         }
 727 }