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

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