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

   1 use ln::msgs::HandleError;
   2 use ln::msgs;
   3
   4 use bitcoin_hashes::{Hash, HashEngine, Hmac, HmacEngine};
   5 use bitcoin_hashes::sha256::Hash as Sha256;
   6
   7 use secp256k1::Secp256k1;
   8 use secp256k1::key::{PublicKey,SecretKey};
   9 use secp256k1::ecdh::SharedSecret;
  10 use secp256k1;
  11
  12 use util::chacha20poly1305rfc::ChaCha20Poly1305RFC;
  13 use util::{byte_utils,rng};
  14
  15 // Sha256("Noise_XK_secp256k1_ChaChaPoly_SHA256")
  16 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];
  17 // Sha256(NOISE_CK || "lightning")
  18 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];
  19
  20 pub enum NextNoiseStep {
  21         ActOne,
  22         ActTwo,
  23         ActThree,
  24         NoiseComplete,
  25 }
  26
  27 #[derive(PartialEq)]
  28 enum NoiseStep {
  29         PreActOne,
  30         PostActOne,
  31         PostActTwo,
  32         // When done swap noise_state for NoiseState::Finished
  33 }
  34
  35 struct BidirectionalNoiseState {
  36         h: [u8; 32],
  37         ck: [u8; 32],
  38 }
  39 enum DirectionalNoiseState {
  40         Outbound {
  41                 ie: SecretKey,
  42         },
  43         Inbound {
  44                 ie: Option<PublicKey>, // filled in if state >= PostActOne
  45                 re: Option<SecretKey>, // filled in if state >= PostActTwo
  46                 temp_k2: Option<[u8; 32]>, // filled in if state >= PostActTwo
  47         }
  48 }
  49 enum NoiseState {
  50         InProgress {
  51                 state: NoiseStep,
  52                 directional_state: DirectionalNoiseState,
  53                 bidirectional_state: BidirectionalNoiseState,
  54         },
  55         Finished {
  56                 sk: [u8; 32],
  57                 sn: u64,
  58                 sck: [u8; 32],
  59                 rk: [u8; 32],
  60                 rn: u64,
  61                 rck: [u8; 32],
  62         }
  63 }
  64
  65 pub struct PeerChannelEncryptor {
  66         secp_ctx: Secp256k1<secp256k1::SignOnly>,
  67         their_node_id: Option<PublicKey>, // filled in for outbound, or inbound after noise_state is Finished
  68
  69         noise_state: NoiseState,
  70 }
  71
  72 impl PeerChannelEncryptor {
  73         pub fn new_outbound(their_node_id: PublicKey) -> PeerChannelEncryptor {
  74                 let mut key = [0u8; 32];
  75                 rng::fill_bytes(&mut key);
  76
  77                 let secp_ctx = Secp256k1::signing_only();
  78                 let sec_key = SecretKey::from_slice(&secp_ctx, &key).unwrap(); //TODO: nicer rng-is-bad error message
  79
  80                 let mut sha = Sha256::engine();
  81                 sha.input(&NOISE_H);
  82                 sha.input(&their_node_id.serialize()[..]);
  83                 let h = Sha256::from_engine(sha).into_inner();
  84
  85                 PeerChannelEncryptor {
  86                         their_node_id: Some(their_node_id),
  87                         secp_ctx: secp_ctx,
  88                         noise_state: NoiseState::InProgress {
  89                                 state: NoiseStep::PreActOne,
  90                                 directional_state: DirectionalNoiseState::Outbound {
  91                                         ie: sec_key,
  92                                 },
  93                                 bidirectional_state: BidirectionalNoiseState {
  94                                         h: h,
  95                                         ck: NOISE_CK,
  96                                 },
  97                         }
  98                 }
  99         }
 100
 101         pub fn new_inbound(our_node_secret: &SecretKey) -> PeerChannelEncryptor {
 102                 let secp_ctx = Secp256k1::signing_only();
 103
 104                 let mut sha = Sha256::engine();
 105                 sha.input(&NOISE_H);
 106                 let our_node_id = PublicKey::from_secret_key(&secp_ctx, our_node_secret);
 107                 sha.input(&our_node_id.serialize()[..]);
 108                 let h = Sha256::from_engine(sha).into_inner();
 109
 110                 PeerChannelEncryptor {
 111                         their_node_id: None,
 112                         secp_ctx: secp_ctx,
 113                         noise_state: NoiseState::InProgress {
 114                                 state: NoiseStep::PreActOne,
 115                                 directional_state: DirectionalNoiseState::Inbound {
 116                                         ie: None,
 117                                         re: None,
 118                                         temp_k2: None,
 119                                 },
 120                                 bidirectional_state: BidirectionalNoiseState {
 121                                         h: h,
 122                                         ck: NOISE_CK,
 123                                 },
 124                         }
 125                 }
 126         }
 127
 128         #[inline]
 129         fn encrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], plaintext: &[u8]) {
 130                 let mut nonce = [0; 12];
 131                 nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
 132
 133                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 134                 let mut tag = [0; 16];
 135                 chacha.encrypt(plaintext, &mut res[0..plaintext.len()], &mut tag);
 136                 res[plaintext.len()..].copy_from_slice(&tag);
 137         }
 138
 139         #[inline]
 140         fn decrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], cyphertext: &[u8]) -> Result<(), HandleError> {
 141                 let mut nonce = [0; 12];
 142                 nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
 143
 144                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 145                 if !chacha.decrypt(&cyphertext[0..cyphertext.len() - 16], res, &cyphertext[cyphertext.len() - 16..]) {
 146                         return Err(HandleError{err: "Bad MAC", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
 147                 }
 148                 Ok(())
 149         }
 150
 151         fn hkdf_extract_expand(salt: &[u8], ikm: &[u8]) -> ([u8; 32], [u8; 32]) {
 152                 let mut hmac = HmacEngine::<Sha256>::new(salt);
 153                 hmac.input(ikm);
 154                 let prk = Hmac::from_engine(hmac).into_inner();
 155                 let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
 156                 hmac.input(&[1; 1]);
 157                 let t1 = Hmac::from_engine(hmac).into_inner();
 158                 let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
 159                 hmac.input(&t1);
 160                 hmac.input(&[2; 1]);
 161                 (t1, Hmac::from_engine(hmac).into_inner())
 162         }
 163
 164         #[inline]
 165         fn hkdf(state: &mut BidirectionalNoiseState, ss: SharedSecret) -> [u8; 32] {
 166                 let (t1, t2) = Self::hkdf_extract_expand(&state.ck, &ss[..]);
 167                 state.ck = t1;
 168                 t2
 169         }
 170
 171         #[inline]
 172         fn outbound_noise_act<T: secp256k1::Signing>(secp_ctx: &Secp256k1<T>, state: &mut BidirectionalNoiseState, our_key: &SecretKey, their_key: &PublicKey) -> ([u8; 50], [u8; 32]) {
 173                 let our_pub = PublicKey::from_secret_key(secp_ctx, &our_key);
 174
 175                 let mut sha = Sha256::engine();
 176                 sha.input(&state.h);
 177                 sha.input(&our_pub.serialize()[..]);
 178                 state.h = Sha256::from_engine(sha).into_inner();
 179
 180                 let ss = SharedSecret::new(secp_ctx, &their_key, &our_key);
 181                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 182
 183                 let mut res = [0; 50];
 184                 res[1..34].copy_from_slice(&our_pub.serialize()[..]);
 185                 PeerChannelEncryptor::encrypt_with_ad(&mut res[34..], 0, &temp_k, &state.h, &[0; 0]);
 186
 187                 let mut sha = Sha256::engine();
 188                 sha.input(&state.h);
 189                 sha.input(&res[34..]);
 190                 state.h = Sha256::from_engine(sha).into_inner();
 191
 192                 (res, temp_k)
 193         }
 194
 195         #[inline]
 196         fn inbound_noise_act<T>(secp_ctx: &Secp256k1<T>, state: &mut BidirectionalNoiseState, act: &[u8], our_key: &SecretKey) -> Result<(PublicKey, [u8; 32]), HandleError> {
 197                 assert_eq!(act.len(), 50);
 198
 199                 if act[0] != 0 {
 200                         return Err(HandleError{err: "Unknown handshake version number", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
 201                 }
 202
 203                 let their_pub = match PublicKey::from_slice(secp_ctx, &act[1..34]) {
 204                         Err(_) => return Err(HandleError{err: "Invalid public key", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })}),
 205                         Ok(key) => key,
 206                 };
 207
 208                 let mut sha = Sha256::engine();
 209                 sha.input(&state.h);
 210                 sha.input(&their_pub.serialize()[..]);
 211                 state.h = Sha256::from_engine(sha).into_inner();
 212
 213                 let ss = SharedSecret::new(secp_ctx, &their_pub, &our_key);
 214                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 215
 216                 let mut dec = [0; 0];
 217                 PeerChannelEncryptor::decrypt_with_ad(&mut dec, 0, &temp_k, &state.h, &act[34..])?;
 218
 219                 let mut sha = Sha256::engine();
 220                 sha.input(&state.h);
 221                 sha.input(&act[34..]);
 222                 state.h = Sha256::from_engine(sha).into_inner();
 223
 224                 Ok((their_pub, temp_k))
 225         }
 226
 227         pub fn get_act_one(&mut self) -> [u8; 50] {
 228                 match self.noise_state {
 229                         NoiseState::InProgress { ref mut state, ref directional_state, ref mut bidirectional_state } =>
 230                                 match directional_state {
 231                                         &DirectionalNoiseState::Outbound { ref ie } => {
 232                                                 if *state != NoiseStep::PreActOne {
 233                                                         panic!("Requested act at wrong step");
 234                                                 }
 235
 236                                                 let (res, _) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &ie, &self.their_node_id.unwrap());
 237                                                 *state = NoiseStep::PostActOne;
 238                                                 res
 239                                         },
 240                                         _ => panic!("Wrong direction for act"),
 241                                 },
 242                         _ => panic!("Cannot get act one after noise handshake completes"),
 243                 }
 244         }
 245
 246         // Separated for testing:
 247         fn process_act_one_with_ephemeral_key(&mut self, act_one: &[u8], our_node_secret: &SecretKey, our_ephemeral: SecretKey) -> Result<[u8; 50], HandleError> {
 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(&self.secp_ctx, 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_one_with_key(&mut self, act_one: &[u8], our_node_secret: &SecretKey) -> Result<[u8; 50], HandleError> {
 275                 assert_eq!(act_one.len(), 50);
 276
 277                 let mut key = [0u8; 32];
 278                 rng::fill_bytes(&mut key);
 279                 let our_ephemeral_key = SecretKey::from_slice(&self.secp_ctx, &key).unwrap(); //TODO: nicer rng-is-bad error message
 280                 self.process_act_one_with_ephemeral_key(act_one, our_node_secret, our_ephemeral_key)
 281         }
 282
 283         pub fn process_act_two(&mut self, act_two: &[u8], our_node_secret: &SecretKey) -> Result<([u8; 66], PublicKey), HandleError> {
 284                 assert_eq!(act_two.len(), 50);
 285
 286                 let final_hkdf;
 287                 let ck;
 288                 let res: [u8; 66] = match self.noise_state {
 289                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 290                                 match directional_state {
 291                                         &DirectionalNoiseState::Outbound { ref ie } => {
 292                                                 if *state != NoiseStep::PostActOne {
 293                                                         panic!("Requested act at wrong step");
 294                                                 }
 295
 296                                                 let (re, temp_k2) = PeerChannelEncryptor::inbound_noise_act(&self.secp_ctx, bidirectional_state, act_two, &ie)?;
 297
 298                                                 let mut res = [0; 66];
 299                                                 let our_node_id = PublicKey::from_secret_key(&self.secp_ctx, &our_node_secret);
 300
 301                                                 PeerChannelEncryptor::encrypt_with_ad(&mut res[1..50], 1, &temp_k2, &bidirectional_state.h, &our_node_id.serialize()[..]);
 302
 303                                                 let mut sha = Sha256::engine();
 304                                                 sha.input(&bidirectional_state.h);
 305                                                 sha.input(&res[1..50]);
 306                                                 bidirectional_state.h = Sha256::from_engine(sha).into_inner();
 307
 308                                                 let ss = SharedSecret::new(&self.secp_ctx, &re, our_node_secret);
 309                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 310
 311                                                 PeerChannelEncryptor::encrypt_with_ad(&mut res[50..], 0, &temp_k, &bidirectional_state.h, &[0; 0]);
 312                                                 final_hkdf = Self::hkdf_extract_expand(&bidirectional_state.ck, &[0; 0]);
 313                                                 ck = bidirectional_state.ck.clone();
 314                                                 res
 315                                         },
 316                                         _ => panic!("Wrong direction for act"),
 317                                 },
 318                         _ => panic!("Cannot get act one after noise handshake completes"),
 319                 };
 320
 321                 let (sk, rk) = final_hkdf;
 322                 self.noise_state = NoiseState::Finished {
 323                         sk: sk,
 324                         sn: 0,
 325                         sck: ck.clone(),
 326                         rk: rk,
 327                         rn: 0,
 328                         rck: ck,
 329                 };
 330
 331                 Ok((res, self.their_node_id.unwrap().clone()))
 332         }
 333
 334         pub fn process_act_three(&mut self, act_three: &[u8]) -> Result<PublicKey, HandleError> {
 335                 assert_eq!(act_three.len(), 66);
 336
 337                 let final_hkdf;
 338                 let ck;
 339                 match self.noise_state {
 340                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 341                                 match directional_state {
 342                                         &DirectionalNoiseState::Inbound { ie: _, ref re, ref temp_k2 } => {
 343                                                 if *state != NoiseStep::PostActTwo {
 344                                                         panic!("Requested act at wrong step");
 345                                                 }
 346                                                 if act_three[0] != 0 {
 347                                                         return Err(HandleError{err: "Unknown handshake version number", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
 348                                                 }
 349
 350                                                 let mut their_node_id = [0; 33];
 351                                                 PeerChannelEncryptor::decrypt_with_ad(&mut their_node_id, 1, &temp_k2.unwrap(), &bidirectional_state.h, &act_three[1..50])?;
 352                                                 self.their_node_id = Some(match PublicKey::from_slice(&self.secp_ctx, &their_node_id) {
 353                                                         Ok(key) => key,
 354                                                         Err(_) => return Err(HandleError{err: "Bad node_id from peer", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })}),
 355                                                 });
 356
 357                                                 let mut sha = Sha256::engine();
 358                                                 sha.input(&bidirectional_state.h);
 359                                                 sha.input(&act_three[1..50]);
 360                                                 bidirectional_state.h = Sha256::from_engine(sha).into_inner();
 361
 362                                                 let ss = SharedSecret::new(&self.secp_ctx, &self.their_node_id.unwrap(), &re.unwrap());
 363                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 364
 365                                                 PeerChannelEncryptor::decrypt_with_ad(&mut [0; 0], 0, &temp_k, &bidirectional_state.h, &act_three[50..])?;
 366                                                 final_hkdf = Self::hkdf_extract_expand(&bidirectional_state.ck, &[0; 0]);
 367                                                 ck = bidirectional_state.ck.clone();
 368                                         },
 369                                         _ => panic!("Wrong direction for act"),
 370                                 },
 371                         _ => panic!("Cannot get act one after noise handshake completes"),
 372                 }
 373
 374                 let (rk, sk) = final_hkdf;
 375                 self.noise_state = NoiseState::Finished {
 376                         sk: sk,
 377                         sn: 0,
 378                         sck: ck.clone(),
 379                         rk: rk,
 380                         rn: 0,
 381                         rck: ck,
 382                 };
 383
 384                 Ok(self.their_node_id.unwrap().clone())
 385         }
 386
 387         /// Encrypts the given message, returning the encrypted version
 388         /// panics if msg.len() > 65535 or Noise handshake has not finished.
 389         pub fn encrypt_message(&mut self, msg: &[u8]) -> Vec<u8> {
 390                 if msg.len() > 65535 {
 391                         panic!("Attempted to encrypt message longer than 65535 bytes!");
 392                 }
 393
 394                 let mut res = Vec::with_capacity(msg.len() + 16*2 + 2);
 395                 res.resize(msg.len() + 16*2 + 2, 0);
 396
 397                 match self.noise_state {
 398                         NoiseState::Finished { ref mut sk, ref mut sn, ref mut sck, rk: _, rn: _, rck: _ } => {
 399                                 if *sn >= 1000 {
 400                                         let (new_sck, new_sk) = Self::hkdf_extract_expand(sck, sk);
 401                                         *sck = new_sck;
 402                                         *sk = new_sk;
 403                                         *sn = 0;
 404                                 }
 405
 406                                 Self::encrypt_with_ad(&mut res[0..16+2], *sn, sk, &[0; 0], &byte_utils::be16_to_array(msg.len() as u16));
 407                                 *sn += 1;
 408
 409                                 Self::encrypt_with_ad(&mut res[16+2..], *sn, sk, &[0; 0], msg);
 410                                 *sn += 1;
 411                         },
 412                         _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
 413                 }
 414
 415                 res
 416         }
 417
 418         /// Decrypts a message length header from the remote peer.
 419         /// panics if noise handshake has not yet finished or msg.len() != 18
 420         pub fn decrypt_length_header(&mut self, msg: &[u8]) -> Result<u16, HandleError> {
 421                 assert_eq!(msg.len(), 16+2);
 422
 423                 match self.noise_state {
 424                         NoiseState::Finished { sk: _, sn: _, sck: _, ref mut rk, ref mut rn, ref mut rck } => {
 425                                 if *rn >= 1000 {
 426                                         let (new_rck, new_rk) = Self::hkdf_extract_expand(rck, rk);
 427                                         *rck = new_rck;
 428                                         *rk = new_rk;
 429                                         *rn = 0;
 430                                 }
 431
 432                                 let mut res = [0; 2];
 433                                 Self::decrypt_with_ad(&mut res, *rn, rk, &[0; 0], msg)?;
 434                                 *rn += 1;
 435                                 Ok(byte_utils::slice_to_be16(&res))
 436                         },
 437                         _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
 438                 }
 439         }
 440
 441         /// Decrypts the given message.
 442         /// panics if msg.len() > 65535 + 16
 443         pub fn decrypt_message(&mut self, msg: &[u8]) -> Result<Vec<u8>, HandleError> {
 444                 if msg.len() > 65535 + 16 {
 445                         panic!("Attempted to encrypt message longer than 65535 bytes!");
 446                 }
 447
 448                 match self.noise_state {
 449                         NoiseState::Finished { sk: _, sn: _, sck: _, ref rk, ref mut rn, rck: _ } => {
 450                                 let mut res = Vec::with_capacity(msg.len() - 16);
 451                                 res.resize(msg.len() - 16, 0);
 452                                 Self::decrypt_with_ad(&mut res[..], *rn, rk, &[0; 0], msg)?;
 453                                 *rn += 1;
 454
 455                                 Ok(res)
 456                         },
 457                         _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
 458                 }
 459         }
 460
 461         pub fn get_noise_step(&self) -> NextNoiseStep {
 462                 match self.noise_state {
 463                         NoiseState::InProgress {ref state, ..} => {
 464                                 match state {
 465                                         &NoiseStep::PreActOne => NextNoiseStep::ActOne,
 466                                         &NoiseStep::PostActOne => NextNoiseStep::ActTwo,
 467                                         &NoiseStep::PostActTwo => NextNoiseStep::ActThree,
 468                                 }
 469                         },
 470                         NoiseState::Finished {..} => NextNoiseStep::NoiseComplete,
 471                 }
 472         }
 473
 474         pub fn is_ready_for_encryption(&self) -> bool {
 475                 match self.noise_state {
 476                         NoiseState::InProgress {..} => { false },
 477                         NoiseState::Finished {..} => { true }
 478                 }
 479         }
 480 }
 481
 482 #[cfg(test)]
 483 mod tests {
 484         use secp256k1::Secp256k1;
 485         use secp256k1::key::{PublicKey,SecretKey};
 486
 487         use hex;
 488
 489         use ln::peer_channel_encryptor::{PeerChannelEncryptor,NoiseState,DirectionalNoiseState};
 490
 491         fn get_outbound_peer_for_initiator_test_vectors() -> PeerChannelEncryptor {
 492                 let secp_ctx = Secp256k1::new();
 493                 let their_node_id = PublicKey::from_slice(&secp_ctx, &hex::decode("028d7500dd4c12685d1f568b4c2b5048e8534b873319f3a8daa612b469132ec7f7").unwrap()[..]).unwrap();
 494
 495                 let mut outbound_peer = PeerChannelEncryptor::new_outbound(their_node_id);
 496                 match outbound_peer.noise_state {
 497                         NoiseState::InProgress { state: _, ref mut directional_state, bidirectional_state: _ } => {
 498                                 *directional_state = DirectionalNoiseState::Outbound { // overwrite ie...
 499                                         ie: SecretKey::from_slice(&secp_ctx, &hex::decode("1212121212121212121212121212121212121212121212121212121212121212").unwrap()[..]).unwrap(),
 500                                 };
 501                         },
 502                         _ => panic!()
 503                 }
 504
 505                 assert_eq!(outbound_peer.get_act_one()[..], hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap()[..]);
 506                 outbound_peer
 507         }
 508
 509         #[test]
 510         fn noise_initiator_test_vectors() {
 511                 let secp_ctx = Secp256k1::new();
 512                 let our_node_id = SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 513
 514                 {
 515                         // transport-initiator successful handshake
 516                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 517
 518                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 519                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 520
 521                         match outbound_peer.noise_state {
 522                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 523                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 524                                         assert_eq!(sn, 0);
 525                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 526                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 527                                         assert_eq!(rn, 0);
 528                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 529                                 },
 530                                 _ => panic!()
 531                         }
 532                 }
 533                 {
 534                         // transport-initiator act2 short read test
 535                         // Can't actually test this cause process_act_two requires you pass the right length!
 536                 }
 537                 {
 538                         // transport-initiator act2 bad version test
 539                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 540
 541                         let act_two = hex::decode("0102466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 542                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 543                 }
 544
 545                 {
 546                         // transport-initiator act2 bad key serialization test
 547                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 548
 549                         let act_two = hex::decode("0004466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 550                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 551                 }
 552
 553                 {
 554                         // transport-initiator act2 bad MAC test
 555                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 556
 557                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730af").unwrap().to_vec();
 558                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 559                 }
 560         }
 561
 562         #[test]
 563         fn noise_responder_test_vectors() {
 564                 let secp_ctx = Secp256k1::new();
 565                 let our_node_id = SecretKey::from_slice(&secp_ctx, &hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 566                 let our_ephemeral = SecretKey::from_slice(&secp_ctx, &hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 567
 568                 {
 569                         // transport-responder successful handshake
 570                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 571
 572                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 573                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 574
 575                         let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 576                         // test vector doesn't specify the initiator static key, but its the same as the one
 577                         // from trasport-initiator successful handshake
 578                         assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex::decode("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]);
 579
 580                         match inbound_peer.noise_state {
 581                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 582                                         assert_eq!(sk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 583                                         assert_eq!(sn, 0);
 584                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 585                                         assert_eq!(rk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 586                                         assert_eq!(rn, 0);
 587                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 588                                 },
 589                                 _ => panic!()
 590                         }
 591                 }
 592                 {
 593                         // transport-responder act1 short read test
 594                         // Can't actually test this cause process_act_one requires you pass the right length!
 595                 }
 596                 {
 597                         // transport-responder act1 bad version test
 598                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 599
 600                         let act_one = hex::decode("01036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 601                         assert!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 602                 }
 603                 {
 604                         // transport-responder act1 bad key serialization test
 605                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 606
 607                         let act_one =hex::decode("00046360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 608                         assert!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 609                 }
 610                 {
 611                         // transport-responder act1 bad MAC test
 612                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 613
 614                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6b").unwrap().to_vec();
 615                         assert!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 616                 }
 617                 {
 618                         // transport-responder act3 bad version test
 619                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 620
 621                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 622                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 623
 624                         let act_three = hex::decode("01b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 625                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 626                 }
 627                 {
 628                         // transport-responder act3 short read test
 629                         // Can't actually test this cause process_act_three requires you pass the right length!
 630                 }
 631                 {
 632                         // transport-responder act3 bad MAC for ciphertext 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_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 637
 638                         let act_three = hex::decode("00c9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 639                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 640                 }
 641                 {
 642                         // transport-responder act3 bad rs 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_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 647
 648                         let act_three = hex::decode("00bfe3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa2235536ad09a8ee351870c2bb7f78b754a26c6cef79a98d25139c856d7efd252c2ae73c").unwrap().to_vec();
 649                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 650                 }
 651                 {
 652                         // transport-responder act3 bad MAC test
 653                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 654
 655                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 656                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 657
 658                         let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139bb").unwrap().to_vec();
 659                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 660                 }
 661         }
 662
 663
 664         #[test]
 665         fn message_encryption_decryption_test_vectors() {
 666                 let secp_ctx = Secp256k1::new();
 667
 668                 // We use the same keys as the initiator and responder test vectors, so we copy those tests
 669                 // here and use them to encrypt.
 670                 let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 671
 672                 {
 673                         let our_node_id = SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 674
 675                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 676                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 677
 678                         match outbound_peer.noise_state {
 679                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 680                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 681                                         assert_eq!(sn, 0);
 682                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 683                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 684                                         assert_eq!(rn, 0);
 685                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 686                                 },
 687                                 _ => panic!()
 688                         }
 689                 }
 690
 691                 let mut inbound_peer;
 692
 693                 {
 694                         // transport-responder successful handshake
 695                         let our_node_id = SecretKey::from_slice(&secp_ctx, &hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 696                         let our_ephemeral = SecretKey::from_slice(&secp_ctx, &hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 697
 698                         inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 699
 700                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 701                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 702
 703                         let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 704                         // test vector doesn't specify the initiator static key, but its the same as the one
 705                         // from trasport-initiator successful handshake
 706                         assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex::decode("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]);
 707
 708                         match inbound_peer.noise_state {
 709                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 710                                         assert_eq!(sk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 711                                         assert_eq!(sn, 0);
 712                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 713                                         assert_eq!(rk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 714                                         assert_eq!(rn, 0);
 715                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 716                                 },
 717                                 _ => panic!()
 718                         }
 719                 }
 720
 721                 for i in 0..1005 {
 722                         let msg = [0x68, 0x65, 0x6c, 0x6c, 0x6f];
 723                         let res = outbound_peer.encrypt_message(&msg);
 724                         assert_eq!(res.len(), 5 + 2*16 + 2);
 725
 726                         let len_header = res[0..2+16].to_vec();
 727                         assert_eq!(inbound_peer.decrypt_length_header(&len_header[..]).unwrap() as usize, msg.len());
 728                         assert_eq!(inbound_peer.decrypt_message(&res[2+16..]).unwrap()[..], msg[..]);
 729
 730                         if i == 0 {
 731                                 assert_eq!(res, hex::decode("cf2b30ddf0cf3f80e7c35a6e6730b59fe802473180f396d88a8fb0db8cbcf25d2f214cf9ea1d95").unwrap());
 732                         } else if i == 1 {
 733                                 assert_eq!(res, hex::decode("72887022101f0b6753e0c7de21657d35a4cb2a1f5cde2650528bbc8f837d0f0d7ad833b1a256a1").unwrap());
 734                         } else if i == 500 {
 735                                 assert_eq!(res, hex::decode("178cb9d7387190fa34db9c2d50027d21793c9bc2d40b1e14dcf30ebeeeb220f48364f7a4c68bf8").unwrap());
 736                         } else if i == 501 {
 737                                 assert_eq!(res, hex::decode("1b186c57d44eb6de4c057c49940d79bb838a145cb528d6e8fd26dbe50a60ca2c104b56b60e45bd").unwrap());
 738                         } else if i == 1000 {
 739                                 assert_eq!(res, hex::decode("4a2f3cc3b5e78ddb83dcb426d9863d9d9a723b0337c89dd0b005d89f8d3c05c52b76b29b740f09").unwrap());
 740                         } else if i == 1001 {
 741                                 assert_eq!(res, hex::decode("2ecd8c8a5629d0d02ab457a0fdd0f7b90a192cd46be5ecb6ca570bfc5e268338b1a16cf4ef2d36").unwrap());
 742                         }
 743                 }
 744         }
 745 }