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