_ 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 crypto::aead::{AeadEncryptor, AeadDecryptor};
  13
  14 use util::chacha20poly1305rfc::ChaCha20Poly1305RFC;
  15 use util::{byte_utils,rng};
  16
  17 // Sha256("Noise_XK_secp256k1_ChaChaPoly_SHA256")
  18 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];
  19 // Sha256(NOISE_CK || "lightning")
  20 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];
  21
  22 pub enum NextNoiseStep {
  23         ActOne,
  24         ActTwo,
  25         ActThree,
  26         NoiseComplete,
  27 }
  28
  29 #[derive(PartialEq)]
  30 enum NoiseStep {
  31         PreActOne,
  32         PostActOne,
  33         PostActTwo,
  34         // When done swap noise_state for NoiseState::Finished
  35 }
  36
  37 struct BidirectionalNoiseState {
  38         h: [u8; 32],
  39         ck: [u8; 32],
  40 }
  41 enum DirectionalNoiseState {
  42         Outbound {
  43                 ie: SecretKey,
  44         },
  45         Inbound {
  46                 ie: Option<PublicKey>, // filled in if state >= PostActOne
  47                 re: Option<SecretKey>, // filled in if state >= PostActTwo
  48                 temp_k2: Option<[u8; 32]>, // filled in if state >= PostActTwo
  49         }
  50 }
  51 enum NoiseState {
  52         InProgress {
  53                 state: NoiseStep,
  54                 directional_state: DirectionalNoiseState,
  55                 bidirectional_state: BidirectionalNoiseState,
  56         },
  57         Finished {
  58                 sk: [u8; 32],
  59                 sn: u64,
  60                 sck: [u8; 32],
  61                 rk: [u8; 32],
  62                 rn: u64,
  63                 rck: [u8; 32],
  64         }
  65 }
  66
  67 pub struct PeerChannelEncryptor {
  68         secp_ctx: Secp256k1<secp256k1::SignOnly>,
  69         their_node_id: Option<PublicKey>, // filled in for outbound, or inbound after noise_state is Finished
  70
  71         noise_state: NoiseState,
  72 }
  73
  74 impl PeerChannelEncryptor {
  75         pub fn new_outbound(their_node_id: PublicKey) -> PeerChannelEncryptor {
  76                 let mut key = [0u8; 32];
  77                 rng::fill_bytes(&mut key);
  78
  79                 let secp_ctx = Secp256k1::signing_only();
  80                 let sec_key = SecretKey::from_slice(&secp_ctx, &key).unwrap(); //TODO: nicer rng-is-bad error message
  81
  82                 let mut sha = Sha256::engine();
  83                 sha.input(&NOISE_H);
  84                 sha.input(&their_node_id.serialize()[..]);
  85                 let h = Sha256::from_engine(sha).into_inner();
  86
  87                 PeerChannelEncryptor {
  88                         their_node_id: Some(their_node_id),
  89                         secp_ctx: secp_ctx,
  90                         noise_state: NoiseState::InProgress {
  91                                 state: NoiseStep::PreActOne,
  92                                 directional_state: DirectionalNoiseState::Outbound {
  93                                         ie: sec_key,
  94                                 },
  95                                 bidirectional_state: BidirectionalNoiseState {
  96                                         h: h,
  97                                         ck: NOISE_CK,
  98                                 },
  99                         }
 100                 }
 101         }
 102
 103         pub fn new_inbound(our_node_secret: &SecretKey) -> PeerChannelEncryptor {
 104                 let secp_ctx = Secp256k1::signing_only();
 105
 106                 let mut sha = Sha256::engine();
 107                 sha.input(&NOISE_H);
 108                 let our_node_id = PublicKey::from_secret_key(&secp_ctx, our_node_secret);
 109                 sha.input(&our_node_id.serialize()[..]);
 110                 let h = Sha256::from_engine(sha).into_inner();
 111
 112                 PeerChannelEncryptor {
 113                         their_node_id: None,
 114                         secp_ctx: secp_ctx,
 115                         noise_state: NoiseState::InProgress {
 116                                 state: NoiseStep::PreActOne,
 117                                 directional_state: DirectionalNoiseState::Inbound {
 118                                         ie: None,
 119                                         re: None,
 120                                         temp_k2: None,
 121                                 },
 122                                 bidirectional_state: BidirectionalNoiseState {
 123                                         h: h,
 124                                         ck: NOISE_CK,
 125                                 },
 126                         }
 127                 }
 128         }
 129
 130         #[inline]
 131         fn encrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], plaintext: &[u8]) {
 132                 let mut nonce = [0; 12];
 133                 nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
 134
 135                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 136                 let mut tag = [0; 16];
 137                 chacha.encrypt(plaintext, &mut res[0..plaintext.len()], &mut tag);
 138                 res[plaintext.len()..].copy_from_slice(&tag);
 139         }
 140
 141         #[inline]
 142         fn decrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], cyphertext: &[u8]) -> Result<(), HandleError> {
 143                 let mut nonce = [0; 12];
 144                 nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
 145
 146                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 147                 if !chacha.decrypt(&cyphertext[0..cyphertext.len() - 16], res, &cyphertext[cyphertext.len() - 16..]) {
 148                         return Err(HandleError{err: "Bad MAC", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
 149                 }
 150                 Ok(())
 151         }
 152
 153         fn hkdf_extract_expand(salt: &[u8], ikm: &[u8]) -> ([u8; 32], [u8; 32]) {
 154                 let mut hmac = HmacEngine::<Sha256>::new(salt);
 155                 hmac.input(ikm);
 156                 let prk = Hmac::from_engine(hmac).into_inner();
 157                 let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
 158                 hmac.input(&[1; 1]);
 159                 let t1 = Hmac::from_engine(hmac).into_inner();
 160                 let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
 161                 hmac.input(&t1);
 162                 hmac.input(&[2; 1]);
 163                 (t1, Hmac::from_engine(hmac).into_inner())
 164         }
 165
 166         #[inline]
 167         fn hkdf(state: &mut BidirectionalNoiseState, ss: SharedSecret) -> [u8; 32] {
 168                 let (t1, t2) = Self::hkdf_extract_expand(&state.ck, &ss[..]);
 169                 state.ck = t1;
 170                 t2
 171         }
 172
 173         #[inline]
 174         fn outbound_noise_act<T: secp256k1::Signing>(secp_ctx: &Secp256k1<T>, state: &mut BidirectionalNoiseState, our_key: &SecretKey, their_key: &PublicKey) -> ([u8; 50], [u8; 32]) {
 175                 let our_pub = PublicKey::from_secret_key(secp_ctx, &our_key);
 176
 177                 let mut sha = Sha256::engine();
 178                 sha.input(&state.h);
 179                 sha.input(&our_pub.serialize()[..]);
 180                 state.h = Sha256::from_engine(sha).into_inner();
 181
 182                 let ss = SharedSecret::new(secp_ctx, &their_key, &our_key);
 183                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 184
 185                 let mut res = [0; 50];
 186                 res[1..34].copy_from_slice(&our_pub.serialize()[..]);
 187                 PeerChannelEncryptor::encrypt_with_ad(&mut res[34..], 0, &temp_k, &state.h, &[0; 0]);
 188
 189                 let mut sha = Sha256::engine();
 190                 sha.input(&state.h);
 191                 sha.input(&res[34..]);
 192                 state.h = Sha256::from_engine(sha).into_inner();
 193
 194                 (res, temp_k)
 195         }
 196
 197         #[inline]
 198         fn inbound_noise_act<T>(secp_ctx: &Secp256k1<T>, state: &mut BidirectionalNoiseState, act: &[u8], our_key: &SecretKey) -> Result<(PublicKey, [u8; 32]), HandleError> {
 199                 assert_eq!(act.len(), 50);
 200
 201                 if act[0] != 0 {
 202                         return Err(HandleError{err: "Unknown handshake version number", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
 203                 }
 204
 205                 let their_pub = match PublicKey::from_slice(secp_ctx, &act[1..34]) {
 206                         Err(_) => return Err(HandleError{err: "Invalid public key", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })}),
 207                         Ok(key) => key,
 208                 };
 209
 210                 let mut sha = Sha256::engine();
 211                 sha.input(&state.h);
 212                 sha.input(&their_pub.serialize()[..]);
 213                 state.h = Sha256::from_engine(sha).into_inner();
 214
 215                 let ss = SharedSecret::new(secp_ctx, &their_pub, &our_key);
 216                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 217
 218                 let mut dec = [0; 0];
 219                 PeerChannelEncryptor::decrypt_with_ad(&mut dec, 0, &temp_k, &state.h, &act[34..])?;
 220
 221                 let mut sha = Sha256::engine();
 222                 sha.input(&state.h);
 223                 sha.input(&act[34..]);
 224                 state.h = Sha256::from_engine(sha).into_inner();
 225
 226                 Ok((their_pub, temp_k))
 227         }
 228
 229         pub fn get_act_one(&mut self) -> [u8; 50] {
 230                 match self.noise_state {
 231                         NoiseState::InProgress { ref mut state, ref directional_state, ref mut bidirectional_state } =>
 232                                 match directional_state {
 233                                         &DirectionalNoiseState::Outbound { ref ie } => {
 234                                                 if *state != NoiseStep::PreActOne {
 235                                                         panic!("Requested act at wrong step");
 236                                                 }
 237
 238                                                 let (res, _) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &ie, &self.their_node_id.unwrap());
 239                                                 *state = NoiseStep::PostActOne;
 240                                                 res
 241                                         },
 242                                         _ => panic!("Wrong direction for act"),
 243                                 },
 244                         _ => panic!("Cannot get act one after noise handshake completes"),
 245                 }
 246         }
 247
 248         // Separated for testing:
 249         fn process_act_one_with_ephemeral_key(&mut self, act_one: &[u8], our_node_secret: &SecretKey, our_ephemeral: SecretKey) -> Result<[u8; 50], HandleError> {
 250                 assert_eq!(act_one.len(), 50);
 251
 252                 match self.noise_state {
 253                         NoiseState::InProgress { ref mut state, ref mut directional_state, ref mut bidirectional_state } =>
 254                                 match directional_state {
 255                                         &mut DirectionalNoiseState::Inbound { ref mut ie, ref mut re, ref mut temp_k2 } => {
 256                                                 if *state != NoiseStep::PreActOne {
 257                                                         panic!("Requested act at wrong step");
 258                                                 }
 259
 260                                                 let (their_pub, _) = PeerChannelEncryptor::inbound_noise_act(&self.secp_ctx, bidirectional_state, act_one, &our_node_secret)?;
 261                                                 ie.get_or_insert(their_pub);
 262
 263                                                 re.get_or_insert(our_ephemeral);
 264
 265                                                 let (res, temp_k) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &re.unwrap(), &ie.unwrap());
 266                                                 *temp_k2 = Some(temp_k);
 267                                                 *state = NoiseStep::PostActTwo;
 268                                                 Ok(res)
 269                                         },
 270                                         _ => panic!("Wrong direction for act"),
 271                                 },
 272                         _ => panic!("Cannot get act one after noise handshake completes"),
 273                 }
 274         }
 275
 276         pub fn process_act_one_with_key(&mut self, act_one: &[u8], our_node_secret: &SecretKey) -> Result<[u8; 50], HandleError> {
 277                 assert_eq!(act_one.len(), 50);
 278
 279                 let mut key = [0u8; 32];
 280                 rng::fill_bytes(&mut key);
 281                 let our_ephemeral_key = SecretKey::from_slice(&self.secp_ctx, &key).unwrap(); //TODO: nicer rng-is-bad error message
 282                 self.process_act_one_with_ephemeral_key(act_one, our_node_secret, our_ephemeral_key)
 283         }
 284
 285         pub fn process_act_two(&mut self, act_two: &[u8], our_node_secret: &SecretKey) -> Result<([u8; 66], PublicKey), HandleError> {
 286                 assert_eq!(act_two.len(), 50);
 287
 288                 let final_hkdf;
 289                 let ck;
 290                 let res: [u8; 66] = match self.noise_state {
 291                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 292                                 match directional_state {
 293                                         &DirectionalNoiseState::Outbound { ref ie } => {
 294                                                 if *state != NoiseStep::PostActOne {
 295                                                         panic!("Requested act at wrong step");
 296                                                 }
 297
 298                                                 let (re, temp_k2) = PeerChannelEncryptor::inbound_noise_act(&self.secp_ctx, bidirectional_state, act_two, &ie)?;
 299
 300                                                 let mut res = [0; 66];
 301                                                 let our_node_id = PublicKey::from_secret_key(&self.secp_ctx, &our_node_secret);
 302
 303                                                 PeerChannelEncryptor::encrypt_with_ad(&mut res[1..50], 1, &temp_k2, &bidirectional_state.h, &our_node_id.serialize()[..]);
 304
 305                                                 let mut sha = Sha256::engine();
 306                                                 sha.input(&bidirectional_state.h);
 307                                                 sha.input(&res[1..50]);
 308                                                 bidirectional_state.h = Sha256::from_engine(sha).into_inner();
 309
 310                                                 let ss = SharedSecret::new(&self.secp_ctx, &re, our_node_secret);
 311                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 312
 313                                                 PeerChannelEncryptor::encrypt_with_ad(&mut res[50..], 0, &temp_k, &bidirectional_state.h, &[0; 0]);
 314                                                 final_hkdf = Self::hkdf_extract_expand(&bidirectional_state.ck, &[0; 0]);
 315                                                 ck = bidirectional_state.ck.clone();
 316                                                 res
 317                                         },
 318                                         _ => panic!("Wrong direction for act"),
 319                                 },
 320                         _ => panic!("Cannot get act one after noise handshake completes"),
 321                 };
 322
 323                 let (sk, rk) = final_hkdf;
 324                 self.noise_state = NoiseState::Finished {
 325                         sk: sk,
 326                         sn: 0,
 327                         sck: ck.clone(),
 328                         rk: rk,
 329                         rn: 0,
 330                         rck: ck,
 331                 };
 332
 333                 Ok((res, self.their_node_id.unwrap().clone()))
 334         }
 335
 336         pub fn process_act_three(&mut self, act_three: &[u8]) -> Result<PublicKey, HandleError> {
 337                 assert_eq!(act_three.len(), 66);
 338
 339                 let final_hkdf;
 340                 let ck;
 341                 match self.noise_state {
 342                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 343                                 match directional_state {
 344                                         &DirectionalNoiseState::Inbound { ie: _, ref re, ref temp_k2 } => {
 345                                                 if *state != NoiseStep::PostActTwo {
 346                                                         panic!("Requested act at wrong step");
 347                                                 }
 348                                                 if act_three[0] != 0 {
 349                                                         return Err(HandleError{err: "Unknown handshake version number", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })});
 350                                                 }
 351
 352                                                 let mut their_node_id = [0; 33];
 353                                                 PeerChannelEncryptor::decrypt_with_ad(&mut their_node_id, 1, &temp_k2.unwrap(), &bidirectional_state.h, &act_three[1..50])?;
 354                                                 self.their_node_id = Some(match PublicKey::from_slice(&self.secp_ctx, &their_node_id) {
 355                                                         Ok(key) => key,
 356                                                         Err(_) => return Err(HandleError{err: "Bad node_id from peer", action: Some(msgs::ErrorAction::DisconnectPeer{ msg: None })}),
 357                                                 });
 358
 359                                                 let mut sha = Sha256::engine();
 360                                                 sha.input(&bidirectional_state.h);
 361                                                 sha.input(&act_three[1..50]);
 362                                                 bidirectional_state.h = Sha256::from_engine(sha).into_inner();
 363
 364                                                 let ss = SharedSecret::new(&self.secp_ctx, &self.their_node_id.unwrap(), &re.unwrap());
 365                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 366
 367                                                 PeerChannelEncryptor::decrypt_with_ad(&mut [0; 0], 0, &temp_k, &bidirectional_state.h, &act_three[50..])?;
 368                                                 final_hkdf = Self::hkdf_extract_expand(&bidirectional_state.ck, &[0; 0]);
 369                                                 ck = bidirectional_state.ck.clone();
 370                                         },
 371                                         _ => panic!("Wrong direction for act"),
 372                                 },
 373                         _ => panic!("Cannot get act one after noise handshake completes"),
 374                 }
 375
 376                 let (rk, sk) = final_hkdf;
 377                 self.noise_state = NoiseState::Finished {
 378                         sk: sk,
 379                         sn: 0,
 380                         sck: ck.clone(),
 381                         rk: rk,
 382                         rn: 0,
 383                         rck: ck,
 384                 };
 385
 386                 Ok(self.their_node_id.unwrap().clone())
 387         }
 388
 389         /// Encrypts the given message, returning the encrypted version
 390         /// panics if msg.len() > 65535 or Noise handshake has not finished.
 391         pub fn encrypt_message(&mut self, msg: &[u8]) -> Vec<u8> {
 392                 if msg.len() > 65535 {
 393                         panic!("Attempted to encrypt message longer than 65535 bytes!");
 394                 }
 395
 396                 let mut res = Vec::with_capacity(msg.len() + 16*2 + 2);
 397                 res.resize(msg.len() + 16*2 + 2, 0);
 398
 399                 match self.noise_state {
 400                         NoiseState::Finished { ref mut sk, ref mut sn, ref mut sck, rk: _, rn: _, rck: _ } => {
 401                                 if *sn >= 1000 {
 402                                         let (new_sck, new_sk) = Self::hkdf_extract_expand(sck, sk);
 403                                         *sck = new_sck;
 404                                         *sk = new_sk;
 405                                         *sn = 0;
 406                                 }
 407
 408                                 Self::encrypt_with_ad(&mut res[0..16+2], *sn, sk, &[0; 0], &byte_utils::be16_to_array(msg.len() as u16));
 409                                 *sn += 1;
 410
 411                                 Self::encrypt_with_ad(&mut res[16+2..], *sn, sk, &[0; 0], msg);
 412                                 *sn += 1;
 413                         },
 414                         _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
 415                 }
 416
 417                 res
 418         }
 419
 420         /// Decrypts a message length header from the remote peer.
 421         /// panics if noise handshake has not yet finished or msg.len() != 18
 422         pub fn decrypt_length_header(&mut self, msg: &[u8]) -> Result<u16, HandleError> {
 423                 assert_eq!(msg.len(), 16+2);
 424
 425                 match self.noise_state {
 426                         NoiseState::Finished { sk: _, sn: _, sck: _, ref mut rk, ref mut rn, ref mut rck } => {
 427                                 if *rn >= 1000 {
 428                                         let (new_rck, new_rk) = Self::hkdf_extract_expand(rck, rk);
 429                                         *rck = new_rck;
 430                                         *rk = new_rk;
 431                                         *rn = 0;
 432                                 }
 433
 434                                 let mut res = [0; 2];
 435                                 Self::decrypt_with_ad(&mut res, *rn, rk, &[0; 0], msg)?;
 436                                 *rn += 1;
 437                                 Ok(byte_utils::slice_to_be16(&res))
 438                         },
 439                         _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
 440                 }
 441         }
 442
 443         /// Decrypts the given message.
 444         /// panics if msg.len() > 65535 + 16
 445         pub fn decrypt_message(&mut self, msg: &[u8]) -> Result<Vec<u8>, HandleError> {
 446                 if msg.len() > 65535 + 16 {
 447                         panic!("Attempted to encrypt message longer than 65535 bytes!");
 448                 }
 449
 450                 match self.noise_state {
 451                         NoiseState::Finished { sk: _, sn: _, sck: _, ref rk, ref mut rn, rck: _ } => {
 452                                 let mut res = Vec::with_capacity(msg.len() - 16);
 453                                 res.resize(msg.len() - 16, 0);
 454                                 Self::decrypt_with_ad(&mut res[..], *rn, rk, &[0; 0], msg)?;
 455                                 *rn += 1;
 456
 457                                 Ok(res)
 458                         },
 459                         _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
 460                 }
 461         }
 462
 463         pub fn get_noise_step(&self) -> NextNoiseStep {
 464                 match self.noise_state {
 465                         NoiseState::InProgress {ref state, ..} => {
 466                                 match state {
 467                                         &NoiseStep::PreActOne => NextNoiseStep::ActOne,
 468                                         &NoiseStep::PostActOne => NextNoiseStep::ActTwo,
 469                                         &NoiseStep::PostActTwo => NextNoiseStep::ActThree,
 470                                 }
 471                         },
 472                         NoiseState::Finished {..} => NextNoiseStep::NoiseComplete,
 473                 }
 474         }
 475
 476         pub fn is_ready_for_encryption(&self) -> bool {
 477                 match self.noise_state {
 478                         NoiseState::InProgress {..} => { false },
 479                         NoiseState::Finished {..} => { true }
 480                 }
 481         }
 482 }
 483
 484 #[cfg(test)]
 485 mod tests {
 486         use secp256k1::Secp256k1;
 487         use secp256k1::key::{PublicKey,SecretKey};
 488
 489         use hex;
 490
 491         use ln::peer_channel_encryptor::{PeerChannelEncryptor,NoiseState,DirectionalNoiseState};
 492
 493         fn get_outbound_peer_for_initiator_test_vectors() -> PeerChannelEncryptor {
 494                 let secp_ctx = Secp256k1::new();
 495                 let their_node_id = PublicKey::from_slice(&secp_ctx, &hex::decode("028d7500dd4c12685d1f568b4c2b5048e8534b873319f3a8daa612b469132ec7f7").unwrap()[..]).unwrap();
 496
 497                 let mut outbound_peer = PeerChannelEncryptor::new_outbound(their_node_id);
 498                 match outbound_peer.noise_state {
 499                         NoiseState::InProgress { state: _, ref mut directional_state, bidirectional_state: _ } => {
 500                                 *directional_state = DirectionalNoiseState::Outbound { // overwrite ie...
 501                                         ie: SecretKey::from_slice(&secp_ctx, &hex::decode("1212121212121212121212121212121212121212121212121212121212121212").unwrap()[..]).unwrap(),
 502                                 };
 503                         },
 504                         _ => panic!()
 505                 }
 506
 507                 assert_eq!(outbound_peer.get_act_one()[..], hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap()[..]);
 508                 outbound_peer
 509         }
 510
 511         #[test]
 512         fn noise_initiator_test_vectors() {
 513                 let secp_ctx = Secp256k1::new();
 514                 let our_node_id = SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 515
 516                 {
 517                         // transport-initiator successful handshake
 518                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 519
 520                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 521                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 522
 523                         match outbound_peer.noise_state {
 524                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 525                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 526                                         assert_eq!(sn, 0);
 527                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 528                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 529                                         assert_eq!(rn, 0);
 530                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 531                                 },
 532                                 _ => panic!()
 533                         }
 534                 }
 535                 {
 536                         // transport-initiator act2 short read test
 537                         // Can't actually test this cause process_act_two requires you pass the right length!
 538                 }
 539                 {
 540                         // transport-initiator act2 bad version test
 541                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 542
 543                         let act_two = hex::decode("0102466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 544                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 545                 }
 546
 547                 {
 548                         // transport-initiator act2 bad key serialization test
 549                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 550
 551                         let act_two = hex::decode("0004466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 552                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 553                 }
 554
 555                 {
 556                         // transport-initiator act2 bad MAC test
 557                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 558
 559                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730af").unwrap().to_vec();
 560                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 561                 }
 562         }
 563
 564         #[test]
 565         fn noise_responder_test_vectors() {
 566                 let secp_ctx = Secp256k1::new();
 567                 let our_node_id = SecretKey::from_slice(&secp_ctx, &hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 568                 let our_ephemeral = SecretKey::from_slice(&secp_ctx, &hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 569
 570                 {
 571                         // transport-responder successful handshake
 572                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 573
 574                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 575                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 576
 577                         let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 578                         // test vector doesn't specify the initiator static key, but its the same as the one
 579                         // from trasport-initiator successful handshake
 580                         assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex::decode("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]);
 581
 582                         match inbound_peer.noise_state {
 583                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 584                                         assert_eq!(sk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 585                                         assert_eq!(sn, 0);
 586                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 587                                         assert_eq!(rk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 588                                         assert_eq!(rn, 0);
 589                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 590                                 },
 591                                 _ => panic!()
 592                         }
 593                 }
 594                 {
 595                         // transport-responder act1 short read test
 596                         // Can't actually test this cause process_act_one requires you pass the right length!
 597                 }
 598                 {
 599                         // transport-responder act1 bad version test
 600                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 601
 602                         let act_one = hex::decode("01036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 603                         assert!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 604                 }
 605                 {
 606                         // transport-responder act1 bad key serialization test
 607                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 608
 609                         let act_one =hex::decode("00046360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 610                         assert!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 611                 }
 612                 {
 613                         // transport-responder act1 bad MAC test
 614                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 615
 616                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6b").unwrap().to_vec();
 617                         assert!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 618                 }
 619                 {
 620                         // transport-responder act3 bad version test
 621                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 622
 623                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 624                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 625
 626                         let act_three = hex::decode("01b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 627                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 628                 }
 629                 {
 630                         // transport-responder act3 short read test
 631                         // Can't actually test this cause process_act_three requires you pass the right length!
 632                 }
 633                 {
 634                         // transport-responder act3 bad MAC for ciphertext test
 635                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 636
 637                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 638                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 639
 640                         let act_three = hex::decode("00c9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 641                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 642                 }
 643                 {
 644                         // transport-responder act3 bad rs test
 645                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 646
 647                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 648                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 649
 650                         let act_three = hex::decode("00bfe3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa2235536ad09a8ee351870c2bb7f78b754a26c6cef79a98d25139c856d7efd252c2ae73c").unwrap().to_vec();
 651                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 652                 }
 653                 {
 654                         // transport-responder act3 bad MAC test
 655                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 656
 657                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 658                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 659
 660                         let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139bb").unwrap().to_vec();
 661                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 662                 }
 663         }
 664
 665
 666         #[test]
 667         fn message_encryption_decryption_test_vectors() {
 668                 let secp_ctx = Secp256k1::new();
 669
 670                 // We use the same keys as the initiator and responder test vectors, so we copy those tests
 671                 // here and use them to encrypt.
 672                 let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 673
 674                 {
 675                         let our_node_id = SecretKey::from_slice(&secp_ctx, &hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 676
 677                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 678                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 679
 680                         match outbound_peer.noise_state {
 681                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 682                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 683                                         assert_eq!(sn, 0);
 684                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 685                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 686                                         assert_eq!(rn, 0);
 687                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 688                                 },
 689                                 _ => panic!()
 690                         }
 691                 }
 692
 693                 let mut inbound_peer;
 694
 695                 {
 696                         // transport-responder successful handshake
 697                         let our_node_id = SecretKey::from_slice(&secp_ctx, &hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 698                         let our_ephemeral = SecretKey::from_slice(&secp_ctx, &hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 699
 700                         inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 701
 702                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 703                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 704
 705                         let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 706                         // test vector doesn't specify the initiator static key, but its the same as the one
 707                         // from trasport-initiator successful handshake
 708                         assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex::decode("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]);
 709
 710                         match inbound_peer.noise_state {
 711                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 712                                         assert_eq!(sk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 713                                         assert_eq!(sn, 0);
 714                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 715                                         assert_eq!(rk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 716                                         assert_eq!(rn, 0);
 717                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 718                                 },
 719                                 _ => panic!()
 720                         }
 721                 }
 722
 723                 for i in 0..1005 {
 724                         let msg = [0x68, 0x65, 0x6c, 0x6c, 0x6f];
 725                         let res = outbound_peer.encrypt_message(&msg);
 726                         assert_eq!(res.len(), 5 + 2*16 + 2);
 727
 728                         let len_header = res[0..2+16].to_vec();
 729                         assert_eq!(inbound_peer.decrypt_length_header(&len_header[..]).unwrap() as usize, msg.len());
 730                         assert_eq!(inbound_peer.decrypt_message(&res[2+16..]).unwrap()[..], msg[..]);
 731
 732                         if i == 0 {
 733                                 assert_eq!(res, hex::decode("cf2b30ddf0cf3f80e7c35a6e6730b59fe802473180f396d88a8fb0db8cbcf25d2f214cf9ea1d95").unwrap());
 734                         } else if i == 1 {
 735                                 assert_eq!(res, hex::decode("72887022101f0b6753e0c7de21657d35a4cb2a1f5cde2650528bbc8f837d0f0d7ad833b1a256a1").unwrap());
 736                         } else if i == 500 {
 737                                 assert_eq!(res, hex::decode("178cb9d7387190fa34db9c2d50027d21793c9bc2d40b1e14dcf30ebeeeb220f48364f7a4c68bf8").unwrap());
 738                         } else if i == 501 {
 739                                 assert_eq!(res, hex::decode("1b186c57d44eb6de4c057c49940d79bb838a145cb528d6e8fd26dbe50a60ca2c104b56b60e45bd").unwrap());
 740                         } else if i == 1000 {
 741                                 assert_eq!(res, hex::decode("4a2f3cc3b5e78ddb83dcb426d9863d9d9a723b0337c89dd0b005d89f8d3c05c52b76b29b740f09").unwrap());
 742                         } else if i == 1001 {
 743                                 assert_eq!(res, hex::decode("2ecd8c8a5629d0d02ab457a0fdd0f7b90a192cd46be5ecb6ca570bfc5e268338b1a16cf4ef2d36").unwrap());
 744                         }
 745                 }
 746         }
 747 }