_ Git - rust-lightning/blob - lightning/src/ln/peer_channel_encryptor.rs

   1 use ln::msgs::LightningError;
   2 use ln::msgs;
   3
   4 use bitcoin::hashes::{Hash, HashEngine, Hmac, HmacEngine};
   5 use bitcoin::hashes::sha256::Hash as Sha256;
   6
   7 use bitcoin::secp256k1::Secp256k1;
   8 use bitcoin::secp256k1::key::{PublicKey,SecretKey};
   9 use bitcoin::secp256k1::ecdh::SharedSecret;
  10 use bitcoin::secp256k1;
  11
  12 use util::chacha20poly1305rfc::ChaCha20Poly1305RFC;
  13 use util::byte_utils;
  14 use bitcoin::hashes::hex::ToHex;
  15
  16 /// Maximum Lightning message data length according to
  17 /// [BOLT-8](https://github.com/lightningnetwork/lightning-rfc/blob/v1.0/08-transport.md#lightning-message-specification)
  18 /// and [BOLT-1](https://github.com/lightningnetwork/lightning-rfc/blob/master/01-messaging.md#lightning-message-format):
  19 pub const LN_MAX_MSG_LEN: usize = ::std::u16::MAX as usize; // Must be equal to 65535
  20
  21 // Sha256("Noise_XK_secp256k1_ChaChaPoly_SHA256")
  22 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];
  23 // Sha256(NOISE_CK || "lightning")
  24 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];
  25
  26 pub enum NextNoiseStep {
  27         ActOne,
  28         ActTwo,
  29         ActThree,
  30         NoiseComplete,
  31 }
  32
  33 #[derive(PartialEq)]
  34 enum NoiseStep {
  35         PreActOne,
  36         PostActOne,
  37         PostActTwo,
  38         // When done swap noise_state for NoiseState::Finished
  39 }
  40
  41 struct BidirectionalNoiseState {
  42         h: [u8; 32],
  43         ck: [u8; 32],
  44 }
  45 enum DirectionalNoiseState {
  46         Outbound {
  47                 ie: SecretKey,
  48         },
  49         Inbound {
  50                 ie: Option<PublicKey>, // filled in if state >= PostActOne
  51                 re: Option<SecretKey>, // filled in if state >= PostActTwo
  52                 temp_k2: Option<[u8; 32]>, // filled in if state >= PostActTwo
  53         }
  54 }
  55 enum NoiseState {
  56         InProgress {
  57                 state: NoiseStep,
  58                 directional_state: DirectionalNoiseState,
  59                 bidirectional_state: BidirectionalNoiseState,
  60         },
  61         Finished {
  62                 sk: [u8; 32],
  63                 sn: u64,
  64                 sck: [u8; 32],
  65                 rk: [u8; 32],
  66                 rn: u64,
  67                 rck: [u8; 32],
  68         }
  69 }
  70
  71 pub struct PeerChannelEncryptor {
  72         secp_ctx: Secp256k1<secp256k1::SignOnly>,
  73         their_node_id: Option<PublicKey>, // filled in for outbound, or inbound after noise_state is Finished
  74
  75         noise_state: NoiseState,
  76 }
  77
  78 impl PeerChannelEncryptor {
  79         pub fn new_outbound(their_node_id: PublicKey, ephemeral_key: SecretKey) -> PeerChannelEncryptor {
  80                 let secp_ctx = Secp256k1::signing_only();
  81
  82                 let mut sha = Sha256::engine();
  83                 sha.input(&NOISE_H);
  84                 sha.input(&their_node_id.serialize()[..]);
  85                 let h = Sha256::from_engine(sha).into_inner();
  86
  87                 PeerChannelEncryptor {
  88                         their_node_id: Some(their_node_id),
  89                         secp_ctx: secp_ctx,
  90                         noise_state: NoiseState::InProgress {
  91                                 state: NoiseStep::PreActOne,
  92                                 directional_state: DirectionalNoiseState::Outbound {
  93                                         ie: ephemeral_key,
  94                                 },
  95                                 bidirectional_state: BidirectionalNoiseState {
  96                                         h: h,
  97                                         ck: NOISE_CK,
  98                                 },
  99                         }
 100                 }
 101         }
 102
 103         pub fn new_inbound(our_node_secret: &SecretKey) -> PeerChannelEncryptor {
 104                 let secp_ctx = Secp256k1::signing_only();
 105
 106                 let mut sha = Sha256::engine();
 107                 sha.input(&NOISE_H);
 108                 let our_node_id = PublicKey::from_secret_key(&secp_ctx, our_node_secret);
 109                 sha.input(&our_node_id.serialize()[..]);
 110                 let h = Sha256::from_engine(sha).into_inner();
 111
 112                 PeerChannelEncryptor {
 113                         their_node_id: None,
 114                         secp_ctx: secp_ctx,
 115                         noise_state: NoiseState::InProgress {
 116                                 state: NoiseStep::PreActOne,
 117                                 directional_state: DirectionalNoiseState::Inbound {
 118                                         ie: None,
 119                                         re: None,
 120                                         temp_k2: None,
 121                                 },
 122                                 bidirectional_state: BidirectionalNoiseState {
 123                                         h: h,
 124                                         ck: NOISE_CK,
 125                                 },
 126                         }
 127                 }
 128         }
 129
 130         #[inline]
 131         fn encrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], plaintext: &[u8]) {
 132                 let mut nonce = [0; 12];
 133                 nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
 134
 135                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 136                 let mut tag = [0; 16];
 137                 chacha.encrypt(plaintext, &mut res[0..plaintext.len()], &mut tag);
 138                 res[plaintext.len()..].copy_from_slice(&tag);
 139         }
 140
 141         #[inline]
 142         fn decrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], cyphertext: &[u8]) -> Result<(), LightningError> {
 143                 let mut nonce = [0; 12];
 144                 nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
 145
 146                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 147                 if !chacha.decrypt(&cyphertext[0..cyphertext.len() - 16], res, &cyphertext[cyphertext.len() - 16..]) {
 148                         return Err(LightningError{err: "Bad MAC".to_owned(), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 149                 }
 150                 Ok(())
 151         }
 152
 153         fn hkdf_extract_expand(salt: &[u8], ikm: &[u8]) -> ([u8; 32], [u8; 32]) {
 154                 let mut hmac = HmacEngine::<Sha256>::new(salt);
 155                 hmac.input(ikm);
 156                 let prk = Hmac::from_engine(hmac).into_inner();
 157                 let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
 158                 hmac.input(&[1; 1]);
 159                 let t1 = Hmac::from_engine(hmac).into_inner();
 160                 let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
 161                 hmac.input(&t1);
 162                 hmac.input(&[2; 1]);
 163                 (t1, Hmac::from_engine(hmac).into_inner())
 164         }
 165
 166         #[inline]
 167         fn hkdf(state: &mut BidirectionalNoiseState, ss: SharedSecret) -> [u8; 32] {
 168                 let (t1, t2) = Self::hkdf_extract_expand(&state.ck, &ss[..]);
 169                 state.ck = t1;
 170                 t2
 171         }
 172
 173         #[inline]
 174         fn outbound_noise_act<T: secp256k1::Signing>(secp_ctx: &Secp256k1<T>, state: &mut BidirectionalNoiseState, our_key: &SecretKey, their_key: &PublicKey) -> ([u8; 50], [u8; 32]) {
 175                 let our_pub = PublicKey::from_secret_key(secp_ctx, &our_key);
 176
 177                 let mut sha = Sha256::engine();
 178                 sha.input(&state.h);
 179                 sha.input(&our_pub.serialize()[..]);
 180                 state.h = Sha256::from_engine(sha).into_inner();
 181
 182                 let ss = SharedSecret::new(&their_key, &our_key);
 183                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 184
 185                 let mut res = [0; 50];
 186                 res[1..34].copy_from_slice(&our_pub.serialize()[..]);
 187                 PeerChannelEncryptor::encrypt_with_ad(&mut res[34..], 0, &temp_k, &state.h, &[0; 0]);
 188
 189                 let mut sha = Sha256::engine();
 190                 sha.input(&state.h);
 191                 sha.input(&res[34..]);
 192                 state.h = Sha256::from_engine(sha).into_inner();
 193
 194                 (res, temp_k)
 195         }
 196
 197         #[inline]
 198         fn inbound_noise_act(state: &mut BidirectionalNoiseState, act: &[u8], our_key: &SecretKey) -> Result<(PublicKey, [u8; 32]), LightningError> {
 199                 assert_eq!(act.len(), 50);
 200
 201                 if act[0] != 0 {
 202                         return Err(LightningError{err: format!("Unknown handshake version number {}", act[0]), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 203                 }
 204
 205                 let their_pub = match PublicKey::from_slice(&act[1..34]) {
 206                         Err(_) => return Err(LightningError{err: format!("Invalid public key {}", &act[1..34].to_hex()), action: msgs::ErrorAction::DisconnectPeer{ msg: None }}),
 207                         Ok(key) => key,
 208                 };
 209
 210                 let mut sha = Sha256::engine();
 211                 sha.input(&state.h);
 212                 sha.input(&their_pub.serialize()[..]);
 213                 state.h = Sha256::from_engine(sha).into_inner();
 214
 215                 let ss = SharedSecret::new(&their_pub, &our_key);
 216                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 217
 218                 let mut dec = [0; 0];
 219                 PeerChannelEncryptor::decrypt_with_ad(&mut dec, 0, &temp_k, &state.h, &act[34..])?;
 220
 221                 let mut sha = Sha256::engine();
 222                 sha.input(&state.h);
 223                 sha.input(&act[34..]);
 224                 state.h = Sha256::from_engine(sha).into_inner();
 225
 226                 Ok((their_pub, temp_k))
 227         }
 228
 229         pub fn get_act_one(&mut self) -> [u8; 50] {
 230                 match self.noise_state {
 231                         NoiseState::InProgress { ref mut state, ref directional_state, ref mut bidirectional_state } =>
 232                                 match directional_state {
 233                                         &DirectionalNoiseState::Outbound { ref ie } => {
 234                                                 if *state != NoiseStep::PreActOne {
 235                                                         panic!("Requested act at wrong step");
 236                                                 }
 237
 238                                                 let (res, _) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &ie, &self.their_node_id.unwrap());
 239                                                 *state = NoiseStep::PostActOne;
 240                                                 res
 241                                         },
 242                                         _ => panic!("Wrong direction for act"),
 243                                 },
 244                         _ => panic!("Cannot get act one after noise handshake completes"),
 245                 }
 246         }
 247
 248         pub fn process_act_one_with_keys(&mut self, act_one: &[u8], our_node_secret: &SecretKey, our_ephemeral: SecretKey) -> Result<[u8; 50], LightningError> {
 249                 assert_eq!(act_one.len(), 50);
 250
 251                 match self.noise_state {
 252                         NoiseState::InProgress { ref mut state, ref mut directional_state, ref mut bidirectional_state } =>
 253                                 match directional_state {
 254                                         &mut DirectionalNoiseState::Inbound { ref mut ie, ref mut re, ref mut temp_k2 } => {
 255                                                 if *state != NoiseStep::PreActOne {
 256                                                         panic!("Requested act at wrong step");
 257                                                 }
 258
 259                                                 let (their_pub, _) = PeerChannelEncryptor::inbound_noise_act(bidirectional_state, act_one, &our_node_secret)?;
 260                                                 ie.get_or_insert(their_pub);
 261
 262                                                 re.get_or_insert(our_ephemeral);
 263
 264                                                 let (res, temp_k) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &re.unwrap(), &ie.unwrap());
 265                                                 *temp_k2 = Some(temp_k);
 266                                                 *state = NoiseStep::PostActTwo;
 267                                                 Ok(res)
 268                                         },
 269                                         _ => panic!("Wrong direction for act"),
 270                                 },
 271                         _ => panic!("Cannot get act one after noise handshake completes"),
 272                 }
 273         }
 274
 275         pub fn process_act_two(&mut self, act_two: &[u8], our_node_secret: &SecretKey) -> Result<([u8; 66], PublicKey), LightningError> {
 276                 assert_eq!(act_two.len(), 50);
 277
 278                 let final_hkdf;
 279                 let ck;
 280                 let res: [u8; 66] = match self.noise_state {
 281                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 282                                 match directional_state {
 283                                         &DirectionalNoiseState::Outbound { ref ie } => {
 284                                                 if *state != NoiseStep::PostActOne {
 285                                                         panic!("Requested act at wrong step");
 286                                                 }
 287
 288                                                 let (re, temp_k2) = PeerChannelEncryptor::inbound_noise_act(bidirectional_state, act_two, &ie)?;
 289
 290                                                 let mut res = [0; 66];
 291                                                 let our_node_id = PublicKey::from_secret_key(&self.secp_ctx, &our_node_secret);
 292
 293                                                 PeerChannelEncryptor::encrypt_with_ad(&mut res[1..50], 1, &temp_k2, &bidirectional_state.h, &our_node_id.serialize()[..]);
 294
 295                                                 let mut sha = Sha256::engine();
 296                                                 sha.input(&bidirectional_state.h);
 297                                                 sha.input(&res[1..50]);
 298                                                 bidirectional_state.h = Sha256::from_engine(sha).into_inner();
 299
 300                                                 let ss = SharedSecret::new(&re, our_node_secret);
 301                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 302
 303                                                 PeerChannelEncryptor::encrypt_with_ad(&mut res[50..], 0, &temp_k, &bidirectional_state.h, &[0; 0]);
 304                                                 final_hkdf = Self::hkdf_extract_expand(&bidirectional_state.ck, &[0; 0]);
 305                                                 ck = bidirectional_state.ck.clone();
 306                                                 res
 307                                         },
 308                                         _ => panic!("Wrong direction for act"),
 309                                 },
 310                         _ => panic!("Cannot get act one after noise handshake completes"),
 311                 };
 312
 313                 let (sk, rk) = final_hkdf;
 314                 self.noise_state = NoiseState::Finished {
 315                         sk: sk,
 316                         sn: 0,
 317                         sck: ck.clone(),
 318                         rk: rk,
 319                         rn: 0,
 320                         rck: ck,
 321                 };
 322
 323                 Ok((res, self.their_node_id.unwrap().clone()))
 324         }
 325
 326         pub fn process_act_three(&mut self, act_three: &[u8]) -> Result<PublicKey, LightningError> {
 327                 assert_eq!(act_three.len(), 66);
 328
 329                 let final_hkdf;
 330                 let ck;
 331                 match self.noise_state {
 332                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 333                                 match directional_state {
 334                                         &DirectionalNoiseState::Inbound { ie: _, ref re, ref temp_k2 } => {
 335                                                 if *state != NoiseStep::PostActTwo {
 336                                                         panic!("Requested act at wrong step");
 337                                                 }
 338                                                 if act_three[0] != 0 {
 339                                                         return Err(LightningError{err: format!("Unknown handshake version number {}", act_three[0]), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 340                                                 }
 341
 342                                                 let mut their_node_id = [0; 33];
 343                                                 PeerChannelEncryptor::decrypt_with_ad(&mut their_node_id, 1, &temp_k2.unwrap(), &bidirectional_state.h, &act_three[1..50])?;
 344                                                 self.their_node_id = Some(match PublicKey::from_slice(&their_node_id) {
 345                                                         Ok(key) => key,
 346                                                         Err(_) => return Err(LightningError{err: format!("Bad node_id from peer, {}", &their_node_id.to_hex()), action: msgs::ErrorAction::DisconnectPeer{ msg: None }}),
 347                                                 });
 348
 349                                                 let mut sha = Sha256::engine();
 350                                                 sha.input(&bidirectional_state.h);
 351                                                 sha.input(&act_three[1..50]);
 352                                                 bidirectional_state.h = Sha256::from_engine(sha).into_inner();
 353
 354                                                 let ss = SharedSecret::new(&self.their_node_id.unwrap(), &re.unwrap());
 355                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 356
 357                                                 PeerChannelEncryptor::decrypt_with_ad(&mut [0; 0], 0, &temp_k, &bidirectional_state.h, &act_three[50..])?;
 358                                                 final_hkdf = Self::hkdf_extract_expand(&bidirectional_state.ck, &[0; 0]);
 359                                                 ck = bidirectional_state.ck.clone();
 360                                         },
 361                                         _ => panic!("Wrong direction for act"),
 362                                 },
 363                         _ => panic!("Cannot get act one after noise handshake completes"),
 364                 }
 365
 366                 let (rk, sk) = final_hkdf;
 367                 self.noise_state = NoiseState::Finished {
 368                         sk: sk,
 369                         sn: 0,
 370                         sck: ck.clone(),
 371                         rk: rk,
 372                         rn: 0,
 373                         rck: ck,
 374                 };
 375
 376                 Ok(self.their_node_id.unwrap().clone())
 377         }
 378
 379         /// Encrypts the given message, returning the encrypted version
 380         /// panics if msg.len() > 65535 or Noise handshake has not finished.
 381         pub fn encrypt_message(&mut self, msg: &[u8]) -> Vec<u8> {
 382                 if msg.len() > LN_MAX_MSG_LEN {
 383                         panic!("Attempted to encrypt message longer than 65535 bytes!");
 384                 }
 385
 386                 let mut res = Vec::with_capacity(msg.len() + 16*2 + 2);
 387                 res.resize(msg.len() + 16*2 + 2, 0);
 388
 389                 match self.noise_state {
 390                         NoiseState::Finished { ref mut sk, ref mut sn, ref mut sck, rk: _, rn: _, rck: _ } => {
 391                                 if *sn >= 1000 {
 392                                         let (new_sck, new_sk) = Self::hkdf_extract_expand(sck, sk);
 393                                         *sck = new_sck;
 394                                         *sk = new_sk;
 395                                         *sn = 0;
 396                                 }
 397
 398                                 Self::encrypt_with_ad(&mut res[0..16+2], *sn, sk, &[0; 0], &byte_utils::be16_to_array(msg.len() as u16));
 399                                 *sn += 1;
 400
 401                                 Self::encrypt_with_ad(&mut res[16+2..], *sn, sk, &[0; 0], msg);
 402                                 *sn += 1;
 403                         },
 404                         _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
 405                 }
 406
 407                 res
 408         }
 409
 410         /// Decrypts a message length header from the remote peer.
 411         /// panics if noise handshake has not yet finished or msg.len() != 18
 412         pub fn decrypt_length_header(&mut self, msg: &[u8]) -> Result<u16, LightningError> {
 413                 assert_eq!(msg.len(), 16+2);
 414
 415                 match self.noise_state {
 416                         NoiseState::Finished { sk: _, sn: _, sck: _, ref mut rk, ref mut rn, ref mut rck } => {
 417                                 if *rn >= 1000 {
 418                                         let (new_rck, new_rk) = Self::hkdf_extract_expand(rck, rk);
 419                                         *rck = new_rck;
 420                                         *rk = new_rk;
 421                                         *rn = 0;
 422                                 }
 423
 424                                 let mut res = [0; 2];
 425                                 Self::decrypt_with_ad(&mut res, *rn, rk, &[0; 0], msg)?;
 426                                 *rn += 1;
 427                                 Ok(byte_utils::slice_to_be16(&res))
 428                         },
 429                         _ => panic!("Tried to decrypt a message prior to noise handshake completion"),
 430                 }
 431         }
 432
 433         /// Decrypts the given message.
 434         /// panics if msg.len() > 65535 + 16
 435         pub fn decrypt_message(&mut self, msg: &[u8]) -> Result<Vec<u8>, LightningError> {
 436                 if msg.len() > LN_MAX_MSG_LEN + 16 {
 437                         panic!("Attempted to decrypt message longer than 65535 + 16 bytes!");
 438                 }
 439
 440                 match self.noise_state {
 441                         NoiseState::Finished { sk: _, sn: _, sck: _, ref rk, ref mut rn, rck: _ } => {
 442                                 let mut res = Vec::with_capacity(msg.len() - 16);
 443                                 res.resize(msg.len() - 16, 0);
 444                                 Self::decrypt_with_ad(&mut res[..], *rn, rk, &[0; 0], msg)?;
 445                                 *rn += 1;
 446
 447                                 Ok(res)
 448                         },
 449                         _ => panic!("Tried to decrypt a message prior to noise handshake completion"),
 450                 }
 451         }
 452
 453         pub fn get_noise_step(&self) -> NextNoiseStep {
 454                 match self.noise_state {
 455                         NoiseState::InProgress {ref state, ..} => {
 456                                 match state {
 457                                         &NoiseStep::PreActOne => NextNoiseStep::ActOne,
 458                                         &NoiseStep::PostActOne => NextNoiseStep::ActTwo,
 459                                         &NoiseStep::PostActTwo => NextNoiseStep::ActThree,
 460                                 }
 461                         },
 462                         NoiseState::Finished {..} => NextNoiseStep::NoiseComplete,
 463                 }
 464         }
 465
 466         pub fn is_ready_for_encryption(&self) -> bool {
 467                 match self.noise_state {
 468                         NoiseState::InProgress {..} => { false },
 469                         NoiseState::Finished {..} => { true }
 470                 }
 471         }
 472 }
 473
 474 #[cfg(test)]
 475 mod tests {
 476         use super::LN_MAX_MSG_LEN;
 477
 478         use bitcoin::secp256k1::key::{PublicKey,SecretKey};
 479
 480         use hex;
 481
 482         use ln::peer_channel_encryptor::{PeerChannelEncryptor,NoiseState};
 483
 484         fn get_outbound_peer_for_initiator_test_vectors() -> PeerChannelEncryptor {
 485                 let their_node_id = PublicKey::from_slice(&hex::decode("028d7500dd4c12685d1f568b4c2b5048e8534b873319f3a8daa612b469132ec7f7").unwrap()[..]).unwrap();
 486
 487                 let mut outbound_peer = PeerChannelEncryptor::new_outbound(their_node_id, SecretKey::from_slice(&hex::decode("1212121212121212121212121212121212121212121212121212121212121212").unwrap()[..]).unwrap());
 488                 assert_eq!(outbound_peer.get_act_one()[..], hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap()[..]);
 489                 outbound_peer
 490         }
 491
 492         fn get_inbound_peer_for_test_vectors() -> PeerChannelEncryptor {
 493                 // transport-responder successful handshake
 494                 let our_node_id = SecretKey::from_slice(&hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 495                 let our_ephemeral = SecretKey::from_slice(&hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 496
 497                 let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 498
 499                 let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 500                 assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 501
 502                 let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 503                 // test vector doesn't specify the initiator static key, but it's the same as the one
 504                 // from transport-initiator successful handshake
 505                 assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex::decode("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]);
 506
 507                 match inbound_peer.noise_state {
 508                         NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 509                                 assert_eq!(sk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 510                                 assert_eq!(sn, 0);
 511                                 assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 512                                 assert_eq!(rk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 513                                 assert_eq!(rn, 0);
 514                                 assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 515                         },
 516                         _ => panic!()
 517                 }
 518
 519                 inbound_peer
 520         }
 521
 522         #[test]
 523         fn noise_initiator_test_vectors() {
 524                 let our_node_id = SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 525
 526                 {
 527                         // transport-initiator successful handshake
 528                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 529
 530                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 531                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 532
 533                         match outbound_peer.noise_state {
 534                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 535                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 536                                         assert_eq!(sn, 0);
 537                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 538                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 539                                         assert_eq!(rn, 0);
 540                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 541                                 },
 542                                 _ => panic!()
 543                         }
 544                 }
 545                 {
 546                         // transport-initiator act2 short read test
 547                         // Can't actually test this cause process_act_two requires you pass the right length!
 548                 }
 549                 {
 550                         // transport-initiator act2 bad version test
 551                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 552
 553                         let act_two = hex::decode("0102466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 554                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 555                 }
 556
 557                 {
 558                         // transport-initiator act2 bad key serialization test
 559                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 560
 561                         let act_two = hex::decode("0004466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 562                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 563                 }
 564
 565                 {
 566                         // transport-initiator act2 bad MAC test
 567                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 568
 569                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730af").unwrap().to_vec();
 570                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 571                 }
 572         }
 573
 574         #[test]
 575         fn noise_responder_test_vectors() {
 576                 let our_node_id = SecretKey::from_slice(&hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 577                 let our_ephemeral = SecretKey::from_slice(&hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 578
 579                 {
 580                         let _ = get_inbound_peer_for_test_vectors();
 581                 }
 582                 {
 583                         // transport-responder act1 short read test
 584                         // Can't actually test this cause process_act_one requires you pass the right length!
 585                 }
 586                 {
 587                         // transport-responder act1 bad version test
 588                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 589
 590                         let act_one = hex::decode("01036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 591                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 592                 }
 593                 {
 594                         // transport-responder act1 bad key serialization test
 595                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 596
 597                         let act_one =hex::decode("00046360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 598                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 599                 }
 600                 {
 601                         // transport-responder act1 bad MAC test
 602                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 603
 604                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6b").unwrap().to_vec();
 605                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 606                 }
 607                 {
 608                         // transport-responder act3 bad version test
 609                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 610
 611                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 612                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 613
 614                         let act_three = hex::decode("01b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 615                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 616                 }
 617                 {
 618                         // transport-responder act3 short read test
 619                         // Can't actually test this cause process_act_three requires you pass the right length!
 620                 }
 621                 {
 622                         // transport-responder act3 bad MAC for ciphertext test
 623                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 624
 625                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 626                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 627
 628                         let act_three = hex::decode("00c9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 629                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 630                 }
 631                 {
 632                         // transport-responder act3 bad rs test
 633                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 634
 635                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 636                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 637
 638                         let act_three = hex::decode("00bfe3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa2235536ad09a8ee351870c2bb7f78b754a26c6cef79a98d25139c856d7efd252c2ae73c").unwrap().to_vec();
 639                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 640                 }
 641                 {
 642                         // transport-responder act3 bad MAC test
 643                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 644
 645                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 646                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 647
 648                         let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139bb").unwrap().to_vec();
 649                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 650                 }
 651         }
 652
 653
 654         #[test]
 655         fn message_encryption_decryption_test_vectors() {
 656                 // We use the same keys as the initiator and responder test vectors, so we copy those tests
 657                 // here and use them to encrypt.
 658                 let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 659
 660                 {
 661                         let our_node_id = SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 662
 663                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 664                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 665
 666                         match outbound_peer.noise_state {
 667                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 668                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 669                                         assert_eq!(sn, 0);
 670                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 671                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 672                                         assert_eq!(rn, 0);
 673                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 674                                 },
 675                                 _ => panic!()
 676                         }
 677                 }
 678
 679                 let mut inbound_peer = get_inbound_peer_for_test_vectors();
 680
 681                 for i in 0..1005 {
 682                         let msg = [0x68, 0x65, 0x6c, 0x6c, 0x6f];
 683                         let res = outbound_peer.encrypt_message(&msg);
 684                         assert_eq!(res.len(), 5 + 2*16 + 2);
 685
 686                         let len_header = res[0..2+16].to_vec();
 687                         assert_eq!(inbound_peer.decrypt_length_header(&len_header[..]).unwrap() as usize, msg.len());
 688                         assert_eq!(inbound_peer.decrypt_message(&res[2+16..]).unwrap()[..], msg[..]);
 689
 690                         if i == 0 {
 691                                 assert_eq!(res, hex::decode("cf2b30ddf0cf3f80e7c35a6e6730b59fe802473180f396d88a8fb0db8cbcf25d2f214cf9ea1d95").unwrap());
 692                         } else if i == 1 {
 693                                 assert_eq!(res, hex::decode("72887022101f0b6753e0c7de21657d35a4cb2a1f5cde2650528bbc8f837d0f0d7ad833b1a256a1").unwrap());
 694                         } else if i == 500 {
 695                                 assert_eq!(res, hex::decode("178cb9d7387190fa34db9c2d50027d21793c9bc2d40b1e14dcf30ebeeeb220f48364f7a4c68bf8").unwrap());
 696                         } else if i == 501 {
 697                                 assert_eq!(res, hex::decode("1b186c57d44eb6de4c057c49940d79bb838a145cb528d6e8fd26dbe50a60ca2c104b56b60e45bd").unwrap());
 698                         } else if i == 1000 {
 699                                 assert_eq!(res, hex::decode("4a2f3cc3b5e78ddb83dcb426d9863d9d9a723b0337c89dd0b005d89f8d3c05c52b76b29b740f09").unwrap());
 700                         } else if i == 1001 {
 701                                 assert_eq!(res, hex::decode("2ecd8c8a5629d0d02ab457a0fdd0f7b90a192cd46be5ecb6ca570bfc5e268338b1a16cf4ef2d36").unwrap());
 702                         }
 703                 }
 704         }
 705
 706         #[test]
 707         fn max_msg_len_limit_value() {
 708                 assert_eq!(LN_MAX_MSG_LEN, 65535);
 709                 assert_eq!(LN_MAX_MSG_LEN, ::std::u16::MAX as usize);
 710         }
 711
 712         #[test]
 713         #[should_panic(expected = "Attempted to encrypt message longer than 65535 bytes!")]
 714         fn max_message_len_encryption() {
 715                 let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 716                 let msg = [4u8; LN_MAX_MSG_LEN + 1];
 717                 outbound_peer.encrypt_message(&msg);
 718         }
 719
 720         #[test]
 721         #[should_panic(expected = "Attempted to decrypt message longer than 65535 + 16 bytes!")]
 722         fn max_message_len_decryption() {
 723                 let mut inbound_peer = get_inbound_peer_for_test_vectors();
 724
 725                 // MSG should not exceed LN_MAX_MSG_LEN + 16
 726                 let msg = [4u8; LN_MAX_MSG_LEN + 17];
 727                 inbound_peer.decrypt_message(&msg).unwrap();
 728         }
 729 }