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