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

   1 // This file is Copyright its original authors, visible in version control
   2 // history.
   3 //
   4 // This file is licensed under the Apache License, Version 2.0 <LICENSE-APACHE
   5 // or http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   6 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your option.
   7 // You may not use this file except in accordance with one or both of these
   8 // licenses.
   9
  10 use ln::msgs::LightningError;
  11 use ln::msgs;
  12
  13 use bitcoin::hashes::{Hash, HashEngine, Hmac, HmacEngine};
  14 use bitcoin::hashes::sha256::Hash as Sha256;
  15
  16 use bitcoin::secp256k1::Secp256k1;
  17 use bitcoin::secp256k1::key::{PublicKey,SecretKey};
  18 use bitcoin::secp256k1::ecdh::SharedSecret;
  19 use bitcoin::secp256k1;
  20
  21 use util::chacha20poly1305rfc::ChaCha20Poly1305RFC;
  22 use util::byte_utils;
  23 use bitcoin::hashes::hex::ToHex;
  24
  25 /// Maximum Lightning message data length according to
  26 /// [BOLT-8](https://github.com/lightningnetwork/lightning-rfc/blob/v1.0/08-transport.md#lightning-message-specification)
  27 /// and [BOLT-1](https://github.com/lightningnetwork/lightning-rfc/blob/master/01-messaging.md#lightning-message-format):
  28 pub const LN_MAX_MSG_LEN: usize = ::core::u16::MAX as usize; // Must be equal to 65535
  29
  30 // Sha256("Noise_XK_secp256k1_ChaChaPoly_SHA256")
  31 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];
  32 // Sha256(NOISE_CK || "lightning")
  33 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];
  34
  35 pub enum NextNoiseStep {
  36         ActOne,
  37         ActTwo,
  38         ActThree,
  39         NoiseComplete,
  40 }
  41
  42 #[derive(PartialEq)]
  43 enum NoiseStep {
  44         PreActOne,
  45         PostActOne,
  46         PostActTwo,
  47         // When done swap noise_state for NoiseState::Finished
  48 }
  49
  50 struct BidirectionalNoiseState {
  51         h: [u8; 32],
  52         ck: [u8; 32],
  53 }
  54 enum DirectionalNoiseState {
  55         Outbound {
  56                 ie: SecretKey,
  57         },
  58         Inbound {
  59                 ie: Option<PublicKey>, // filled in if state >= PostActOne
  60                 re: Option<SecretKey>, // filled in if state >= PostActTwo
  61                 temp_k2: Option<[u8; 32]>, // filled in if state >= PostActTwo
  62         }
  63 }
  64 enum NoiseState {
  65         InProgress {
  66                 state: NoiseStep,
  67                 directional_state: DirectionalNoiseState,
  68                 bidirectional_state: BidirectionalNoiseState,
  69         },
  70         Finished {
  71                 sk: [u8; 32],
  72                 sn: u64,
  73                 sck: [u8; 32],
  74                 rk: [u8; 32],
  75                 rn: u64,
  76                 rck: [u8; 32],
  77         }
  78 }
  79
  80 pub struct PeerChannelEncryptor {
  81         secp_ctx: Secp256k1<secp256k1::SignOnly>,
  82         their_node_id: Option<PublicKey>, // filled in for outbound, or inbound after noise_state is Finished
  83
  84         noise_state: NoiseState,
  85 }
  86
  87 impl PeerChannelEncryptor {
  88         pub fn new_outbound(their_node_id: PublicKey, ephemeral_key: SecretKey) -> PeerChannelEncryptor {
  89                 let secp_ctx = Secp256k1::signing_only();
  90
  91                 let mut sha = Sha256::engine();
  92                 sha.input(&NOISE_H);
  93                 sha.input(&their_node_id.serialize()[..]);
  94                 let h = Sha256::from_engine(sha).into_inner();
  95
  96                 PeerChannelEncryptor {
  97                         their_node_id: Some(their_node_id),
  98                         secp_ctx,
  99                         noise_state: NoiseState::InProgress {
 100                                 state: NoiseStep::PreActOne,
 101                                 directional_state: DirectionalNoiseState::Outbound {
 102                                         ie: ephemeral_key,
 103                                 },
 104                                 bidirectional_state: BidirectionalNoiseState {
 105                                         h,
 106                                         ck: NOISE_CK,
 107                                 },
 108                         }
 109                 }
 110         }
 111
 112         pub fn new_inbound(our_node_secret: &SecretKey) -> PeerChannelEncryptor {
 113                 let secp_ctx = Secp256k1::signing_only();
 114
 115                 let mut sha = Sha256::engine();
 116                 sha.input(&NOISE_H);
 117                 let our_node_id = PublicKey::from_secret_key(&secp_ctx, our_node_secret);
 118                 sha.input(&our_node_id.serialize()[..]);
 119                 let h = Sha256::from_engine(sha).into_inner();
 120
 121                 PeerChannelEncryptor {
 122                         their_node_id: None,
 123                         secp_ctx,
 124                         noise_state: NoiseState::InProgress {
 125                                 state: NoiseStep::PreActOne,
 126                                 directional_state: DirectionalNoiseState::Inbound {
 127                                         ie: None,
 128                                         re: None,
 129                                         temp_k2: None,
 130                                 },
 131                                 bidirectional_state: BidirectionalNoiseState {
 132                                         h,
 133                                         ck: NOISE_CK,
 134                                 },
 135                         }
 136                 }
 137         }
 138
 139         #[inline]
 140         fn encrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], plaintext: &[u8]) {
 141                 let mut nonce = [0; 12];
 142                 nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
 143
 144                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 145                 let mut tag = [0; 16];
 146                 chacha.encrypt(plaintext, &mut res[0..plaintext.len()], &mut tag);
 147                 res[plaintext.len()..].copy_from_slice(&tag);
 148         }
 149
 150         #[inline]
 151         fn decrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], cyphertext: &[u8]) -> Result<(), LightningError> {
 152                 let mut nonce = [0; 12];
 153                 nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
 154
 155                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 156                 if !chacha.decrypt(&cyphertext[0..cyphertext.len() - 16], res, &cyphertext[cyphertext.len() - 16..]) {
 157                         return Err(LightningError{err: "Bad MAC".to_owned(), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 158                 }
 159                 Ok(())
 160         }
 161
 162         fn hkdf_extract_expand(salt: &[u8], ikm: &[u8]) -> ([u8; 32], [u8; 32]) {
 163                 let mut hmac = HmacEngine::<Sha256>::new(salt);
 164                 hmac.input(ikm);
 165                 let prk = Hmac::from_engine(hmac).into_inner();
 166                 let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
 167                 hmac.input(&[1; 1]);
 168                 let t1 = Hmac::from_engine(hmac).into_inner();
 169                 let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
 170                 hmac.input(&t1);
 171                 hmac.input(&[2; 1]);
 172                 (t1, Hmac::from_engine(hmac).into_inner())
 173         }
 174
 175         #[inline]
 176         fn hkdf(state: &mut BidirectionalNoiseState, ss: SharedSecret) -> [u8; 32] {
 177                 let (t1, t2) = Self::hkdf_extract_expand(&state.ck, &ss[..]);
 178                 state.ck = t1;
 179                 t2
 180         }
 181
 182         #[inline]
 183         fn outbound_noise_act<T: secp256k1::Signing>(secp_ctx: &Secp256k1<T>, state: &mut BidirectionalNoiseState, our_key: &SecretKey, their_key: &PublicKey) -> ([u8; 50], [u8; 32]) {
 184                 let our_pub = PublicKey::from_secret_key(secp_ctx, &our_key);
 185
 186                 let mut sha = Sha256::engine();
 187                 sha.input(&state.h);
 188                 sha.input(&our_pub.serialize()[..]);
 189                 state.h = Sha256::from_engine(sha).into_inner();
 190
 191                 let ss = SharedSecret::new(&their_key, &our_key);
 192                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 193
 194                 let mut res = [0; 50];
 195                 res[1..34].copy_from_slice(&our_pub.serialize()[..]);
 196                 PeerChannelEncryptor::encrypt_with_ad(&mut res[34..], 0, &temp_k, &state.h, &[0; 0]);
 197
 198                 let mut sha = Sha256::engine();
 199                 sha.input(&state.h);
 200                 sha.input(&res[34..]);
 201                 state.h = Sha256::from_engine(sha).into_inner();
 202
 203                 (res, temp_k)
 204         }
 205
 206         #[inline]
 207         fn inbound_noise_act(state: &mut BidirectionalNoiseState, act: &[u8], our_key: &SecretKey) -> Result<(PublicKey, [u8; 32]), LightningError> {
 208                 assert_eq!(act.len(), 50);
 209
 210                 if act[0] != 0 {
 211                         return Err(LightningError{err: format!("Unknown handshake version number {}", act[0]), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 212                 }
 213
 214                 let their_pub = match PublicKey::from_slice(&act[1..34]) {
 215                         Err(_) => return Err(LightningError{err: format!("Invalid public key {}", &act[1..34].to_hex()), action: msgs::ErrorAction::DisconnectPeer{ msg: None }}),
 216                         Ok(key) => key,
 217                 };
 218
 219                 let mut sha = Sha256::engine();
 220                 sha.input(&state.h);
 221                 sha.input(&their_pub.serialize()[..]);
 222                 state.h = Sha256::from_engine(sha).into_inner();
 223
 224                 let ss = SharedSecret::new(&their_pub, &our_key);
 225                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 226
 227                 let mut dec = [0; 0];
 228                 PeerChannelEncryptor::decrypt_with_ad(&mut dec, 0, &temp_k, &state.h, &act[34..])?;
 229
 230                 let mut sha = Sha256::engine();
 231                 sha.input(&state.h);
 232                 sha.input(&act[34..]);
 233                 state.h = Sha256::from_engine(sha).into_inner();
 234
 235                 Ok((their_pub, temp_k))
 236         }
 237
 238         pub fn get_act_one(&mut self) -> [u8; 50] {
 239                 match self.noise_state {
 240                         NoiseState::InProgress { ref mut state, ref directional_state, ref mut bidirectional_state } =>
 241                                 match directional_state {
 242                                         &DirectionalNoiseState::Outbound { ref ie } => {
 243                                                 if *state != NoiseStep::PreActOne {
 244                                                         panic!("Requested act at wrong step");
 245                                                 }
 246
 247                                                 let (res, _) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &ie, &self.their_node_id.unwrap());
 248                                                 *state = NoiseStep::PostActOne;
 249                                                 res
 250                                         },
 251                                         _ => panic!("Wrong direction for act"),
 252                                 },
 253                         _ => panic!("Cannot get act one after noise handshake completes"),
 254                 }
 255         }
 256
 257         pub fn process_act_one_with_keys(&mut self, act_one: &[u8], our_node_secret: &SecretKey, our_ephemeral: SecretKey) -> Result<[u8; 50], LightningError> {
 258                 assert_eq!(act_one.len(), 50);
 259
 260                 match self.noise_state {
 261                         NoiseState::InProgress { ref mut state, ref mut directional_state, ref mut bidirectional_state } =>
 262                                 match directional_state {
 263                                         &mut DirectionalNoiseState::Inbound { ref mut ie, ref mut re, ref mut temp_k2 } => {
 264                                                 if *state != NoiseStep::PreActOne {
 265                                                         panic!("Requested act at wrong step");
 266                                                 }
 267
 268                                                 let (their_pub, _) = PeerChannelEncryptor::inbound_noise_act(bidirectional_state, act_one, &our_node_secret)?;
 269                                                 ie.get_or_insert(their_pub);
 270
 271                                                 re.get_or_insert(our_ephemeral);
 272
 273                                                 let (res, temp_k) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &re.unwrap(), &ie.unwrap());
 274                                                 *temp_k2 = Some(temp_k);
 275                                                 *state = NoiseStep::PostActTwo;
 276                                                 Ok(res)
 277                                         },
 278                                         _ => panic!("Wrong direction for act"),
 279                                 },
 280                         _ => panic!("Cannot get act one after noise handshake completes"),
 281                 }
 282         }
 283
 284         pub fn process_act_two(&mut self, act_two: &[u8], our_node_secret: &SecretKey) -> Result<([u8; 66], PublicKey), LightningError> {
 285                 assert_eq!(act_two.len(), 50);
 286
 287                 let final_hkdf;
 288                 let ck;
 289                 let res: [u8; 66] = match self.noise_state {
 290                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 291                                 match directional_state {
 292                                         &DirectionalNoiseState::Outbound { ref ie } => {
 293                                                 if *state != NoiseStep::PostActOne {
 294                                                         panic!("Requested act at wrong step");
 295                                                 }
 296
 297                                                 let (re, temp_k2) = PeerChannelEncryptor::inbound_noise_act(bidirectional_state, act_two, &ie)?;
 298
 299                                                 let mut res = [0; 66];
 300                                                 let our_node_id = PublicKey::from_secret_key(&self.secp_ctx, &our_node_secret);
 301
 302                                                 PeerChannelEncryptor::encrypt_with_ad(&mut res[1..50], 1, &temp_k2, &bidirectional_state.h, &our_node_id.serialize()[..]);
 303
 304                                                 let mut sha = Sha256::engine();
 305                                                 sha.input(&bidirectional_state.h);
 306                                                 sha.input(&res[1..50]);
 307                                                 bidirectional_state.h = Sha256::from_engine(sha).into_inner();
 308
 309                                                 let ss = SharedSecret::new(&re, our_node_secret);
 310                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 311
 312                                                 PeerChannelEncryptor::encrypt_with_ad(&mut res[50..], 0, &temp_k, &bidirectional_state.h, &[0; 0]);
 313                                                 final_hkdf = Self::hkdf_extract_expand(&bidirectional_state.ck, &[0; 0]);
 314                                                 ck = bidirectional_state.ck.clone();
 315                                                 res
 316                                         },
 317                                         _ => panic!("Wrong direction for act"),
 318                                 },
 319                         _ => panic!("Cannot get act one after noise handshake completes"),
 320                 };
 321
 322                 let (sk, rk) = final_hkdf;
 323                 self.noise_state = NoiseState::Finished {
 324                         sk,
 325                         sn: 0,
 326                         sck: ck.clone(),
 327                         rk,
 328                         rn: 0,
 329                         rck: ck,
 330                 };
 331
 332                 Ok((res, self.their_node_id.unwrap().clone()))
 333         }
 334
 335         pub fn process_act_three(&mut self, act_three: &[u8]) -> Result<PublicKey, LightningError> {
 336                 assert_eq!(act_three.len(), 66);
 337
 338                 let final_hkdf;
 339                 let ck;
 340                 match self.noise_state {
 341                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 342                                 match directional_state {
 343                                         &DirectionalNoiseState::Inbound { ie: _, ref re, ref temp_k2 } => {
 344                                                 if *state != NoiseStep::PostActTwo {
 345                                                         panic!("Requested act at wrong step");
 346                                                 }
 347                                                 if act_three[0] != 0 {
 348                                                         return Err(LightningError{err: format!("Unknown handshake version number {}", act_three[0]), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 349                                                 }
 350
 351                                                 let mut their_node_id = [0; 33];
 352                                                 PeerChannelEncryptor::decrypt_with_ad(&mut their_node_id, 1, &temp_k2.unwrap(), &bidirectional_state.h, &act_three[1..50])?;
 353                                                 self.their_node_id = Some(match PublicKey::from_slice(&their_node_id) {
 354                                                         Ok(key) => key,
 355                                                         Err(_) => return Err(LightningError{err: format!("Bad node_id from peer, {}", &their_node_id.to_hex()), action: msgs::ErrorAction::DisconnectPeer{ msg: None }}),
 356                                                 });
 357
 358                                                 let mut sha = Sha256::engine();
 359                                                 sha.input(&bidirectional_state.h);
 360                                                 sha.input(&act_three[1..50]);
 361                                                 bidirectional_state.h = Sha256::from_engine(sha).into_inner();
 362
 363                                                 let ss = SharedSecret::new(&self.their_node_id.unwrap(), &re.unwrap());
 364                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 365
 366                                                 PeerChannelEncryptor::decrypt_with_ad(&mut [0; 0], 0, &temp_k, &bidirectional_state.h, &act_three[50..])?;
 367                                                 final_hkdf = Self::hkdf_extract_expand(&bidirectional_state.ck, &[0; 0]);
 368                                                 ck = bidirectional_state.ck.clone();
 369                                         },
 370                                         _ => panic!("Wrong direction for act"),
 371                                 },
 372                         _ => panic!("Cannot get act one after noise handshake completes"),
 373                 }
 374
 375                 let (rk, sk) = final_hkdf;
 376                 self.noise_state = NoiseState::Finished {
 377                         sk,
 378                         sn: 0,
 379                         sck: ck.clone(),
 380                         rk,
 381                         rn: 0,
 382                         rck: ck,
 383                 };
 384
 385                 Ok(self.their_node_id.unwrap().clone())
 386         }
 387
 388         /// Encrypts the given message, returning the encrypted version
 389         /// panics if msg.len() > 65535 or Noise handshake has not finished.
 390         pub fn encrypt_message(&mut self, msg: &[u8]) -> Vec<u8> {
 391                 if msg.len() > LN_MAX_MSG_LEN {
 392                         panic!("Attempted to encrypt message longer than 65535 bytes!");
 393                 }
 394
 395                 let mut res = Vec::with_capacity(msg.len() + 16*2 + 2);
 396                 res.resize(msg.len() + 16*2 + 2, 0);
 397
 398                 match self.noise_state {
 399                         NoiseState::Finished { ref mut sk, ref mut sn, ref mut sck, rk: _, rn: _, rck: _ } => {
 400                                 if *sn >= 1000 {
 401                                         let (new_sck, new_sk) = Self::hkdf_extract_expand(sck, sk);
 402                                         *sck = new_sck;
 403                                         *sk = new_sk;
 404                                         *sn = 0;
 405                                 }
 406
 407                                 Self::encrypt_with_ad(&mut res[0..16+2], *sn, sk, &[0; 0], &byte_utils::be16_to_array(msg.len() as u16));
 408                                 *sn += 1;
 409
 410                                 Self::encrypt_with_ad(&mut res[16+2..], *sn, sk, &[0; 0], msg);
 411                                 *sn += 1;
 412                         },
 413                         _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
 414                 }
 415
 416                 res
 417         }
 418
 419         /// Decrypts a message length header from the remote peer.
 420         /// panics if noise handshake has not yet finished or msg.len() != 18
 421         pub fn decrypt_length_header(&mut self, msg: &[u8]) -> Result<u16, LightningError> {
 422                 assert_eq!(msg.len(), 16+2);
 423
 424                 match self.noise_state {
 425                         NoiseState::Finished { sk: _, sn: _, sck: _, ref mut rk, ref mut rn, ref mut rck } => {
 426                                 if *rn >= 1000 {
 427                                         let (new_rck, new_rk) = Self::hkdf_extract_expand(rck, rk);
 428                                         *rck = new_rck;
 429                                         *rk = new_rk;
 430                                         *rn = 0;
 431                                 }
 432
 433                                 let mut res = [0; 2];
 434                                 Self::decrypt_with_ad(&mut res, *rn, rk, &[0; 0], msg)?;
 435                                 *rn += 1;
 436                                 Ok(byte_utils::slice_to_be16(&res))
 437                         },
 438                         _ => panic!("Tried to decrypt a message prior to noise handshake completion"),
 439                 }
 440         }
 441
 442         /// Decrypts the given message.
 443         /// panics if msg.len() > 65535 + 16
 444         pub fn decrypt_message(&mut self, msg: &[u8]) -> Result<Vec<u8>, LightningError> {
 445                 if msg.len() > LN_MAX_MSG_LEN + 16 {
 446                         panic!("Attempted to decrypt message longer than 65535 + 16 bytes!");
 447                 }
 448
 449                 match self.noise_state {
 450                         NoiseState::Finished { sk: _, sn: _, sck: _, ref rk, ref mut rn, rck: _ } => {
 451                                 let mut res = Vec::with_capacity(msg.len() - 16);
 452                                 res.resize(msg.len() - 16, 0);
 453                                 Self::decrypt_with_ad(&mut res[..], *rn, rk, &[0; 0], msg)?;
 454                                 *rn += 1;
 455
 456                                 Ok(res)
 457                         },
 458                         _ => panic!("Tried to decrypt a message prior to noise handshake completion"),
 459                 }
 460         }
 461
 462         pub fn get_noise_step(&self) -> NextNoiseStep {
 463                 match self.noise_state {
 464                         NoiseState::InProgress {ref state, ..} => {
 465                                 match state {
 466                                         &NoiseStep::PreActOne => NextNoiseStep::ActOne,
 467                                         &NoiseStep::PostActOne => NextNoiseStep::ActTwo,
 468                                         &NoiseStep::PostActTwo => NextNoiseStep::ActThree,
 469                                 }
 470                         },
 471                         NoiseState::Finished {..} => NextNoiseStep::NoiseComplete,
 472                 }
 473         }
 474
 475         pub fn is_ready_for_encryption(&self) -> bool {
 476                 match self.noise_state {
 477                         NoiseState::InProgress {..} => { false },
 478                         NoiseState::Finished {..} => { true }
 479                 }
 480         }
 481 }
 482
 483 #[cfg(test)]
 484 mod tests {
 485         use super::LN_MAX_MSG_LEN;
 486
 487         use bitcoin::secp256k1::key::{PublicKey,SecretKey};
 488
 489         use hex;
 490
 491         use ln::peer_channel_encryptor::{PeerChannelEncryptor,NoiseState};
 492
 493         fn get_outbound_peer_for_initiator_test_vectors() -> PeerChannelEncryptor {
 494                 let their_node_id = PublicKey::from_slice(&hex::decode("028d7500dd4c12685d1f568b4c2b5048e8534b873319f3a8daa612b469132ec7f7").unwrap()[..]).unwrap();
 495
 496                 let mut outbound_peer = PeerChannelEncryptor::new_outbound(their_node_id, SecretKey::from_slice(&hex::decode("1212121212121212121212121212121212121212121212121212121212121212").unwrap()[..]).unwrap());
 497                 assert_eq!(outbound_peer.get_act_one()[..], hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap()[..]);
 498                 outbound_peer
 499         }
 500
 501         fn get_inbound_peer_for_test_vectors() -> PeerChannelEncryptor {
 502                 // transport-responder successful handshake
 503                 let our_node_id = SecretKey::from_slice(&hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 504                 let our_ephemeral = SecretKey::from_slice(&hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 505
 506                 let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 507
 508                 let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 509                 assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 510
 511                 let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 512                 // test vector doesn't specify the initiator static key, but it's the same as the one
 513                 // from transport-initiator successful handshake
 514                 assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex::decode("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]);
 515
 516                 match inbound_peer.noise_state {
 517                         NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 518                                 assert_eq!(sk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 519                                 assert_eq!(sn, 0);
 520                                 assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 521                                 assert_eq!(rk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 522                                 assert_eq!(rn, 0);
 523                                 assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 524                         },
 525                         _ => panic!()
 526                 }
 527
 528                 inbound_peer
 529         }
 530
 531         #[test]
 532         fn noise_initiator_test_vectors() {
 533                 let our_node_id = SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 534
 535                 {
 536                         // transport-initiator successful handshake
 537                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 538
 539                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 540                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 541
 542                         match outbound_peer.noise_state {
 543                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 544                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 545                                         assert_eq!(sn, 0);
 546                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 547                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 548                                         assert_eq!(rn, 0);
 549                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 550                                 },
 551                                 _ => panic!()
 552                         }
 553                 }
 554                 {
 555                         // transport-initiator act2 short read test
 556                         // Can't actually test this cause process_act_two requires you pass the right length!
 557                 }
 558                 {
 559                         // transport-initiator act2 bad version test
 560                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 561
 562                         let act_two = hex::decode("0102466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 563                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 564                 }
 565
 566                 {
 567                         // transport-initiator act2 bad key serialization test
 568                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 569
 570                         let act_two = hex::decode("0004466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 571                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 572                 }
 573
 574                 {
 575                         // transport-initiator act2 bad MAC test
 576                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 577
 578                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730af").unwrap().to_vec();
 579                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 580                 }
 581         }
 582
 583         #[test]
 584         fn noise_responder_test_vectors() {
 585                 let our_node_id = SecretKey::from_slice(&hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 586                 let our_ephemeral = SecretKey::from_slice(&hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 587
 588                 {
 589                         let _ = get_inbound_peer_for_test_vectors();
 590                 }
 591                 {
 592                         // transport-responder act1 short read test
 593                         // Can't actually test this cause process_act_one requires you pass the right length!
 594                 }
 595                 {
 596                         // transport-responder act1 bad version test
 597                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 598
 599                         let act_one = hex::decode("01036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 600                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 601                 }
 602                 {
 603                         // transport-responder act1 bad key serialization test
 604                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 605
 606                         let act_one =hex::decode("00046360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 607                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 608                 }
 609                 {
 610                         // transport-responder act1 bad MAC test
 611                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 612
 613                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6b").unwrap().to_vec();
 614                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 615                 }
 616                 {
 617                         // transport-responder act3 bad version test
 618                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 619
 620                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 621                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 622
 623                         let act_three = hex::decode("01b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 624                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 625                 }
 626                 {
 627                         // transport-responder act3 short read test
 628                         // Can't actually test this cause process_act_three requires you pass the right length!
 629                 }
 630                 {
 631                         // transport-responder act3 bad MAC for ciphertext test
 632                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 633
 634                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 635                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 636
 637                         let act_three = hex::decode("00c9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 638                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 639                 }
 640                 {
 641                         // transport-responder act3 bad rs test
 642                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 643
 644                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 645                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 646
 647                         let act_three = hex::decode("00bfe3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa2235536ad09a8ee351870c2bb7f78b754a26c6cef79a98d25139c856d7efd252c2ae73c").unwrap().to_vec();
 648                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 649                 }
 650                 {
 651                         // transport-responder act3 bad MAC test
 652                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 653
 654                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 655                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 656
 657                         let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139bb").unwrap().to_vec();
 658                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 659                 }
 660         }
 661
 662
 663         #[test]
 664         fn message_encryption_decryption_test_vectors() {
 665                 // We use the same keys as the initiator and responder test vectors, so we copy those tests
 666                 // here and use them to encrypt.
 667                 let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 668
 669                 {
 670                         let our_node_id = SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 671
 672                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 673                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 674
 675                         match outbound_peer.noise_state {
 676                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 677                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 678                                         assert_eq!(sn, 0);
 679                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 680                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 681                                         assert_eq!(rn, 0);
 682                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 683                                 },
 684                                 _ => panic!()
 685                         }
 686                 }
 687
 688                 let mut inbound_peer = get_inbound_peer_for_test_vectors();
 689
 690                 for i in 0..1005 {
 691                         let msg = [0x68, 0x65, 0x6c, 0x6c, 0x6f];
 692                         let res = outbound_peer.encrypt_message(&msg);
 693                         assert_eq!(res.len(), 5 + 2*16 + 2);
 694
 695                         let len_header = res[0..2+16].to_vec();
 696                         assert_eq!(inbound_peer.decrypt_length_header(&len_header[..]).unwrap() as usize, msg.len());
 697                         assert_eq!(inbound_peer.decrypt_message(&res[2+16..]).unwrap()[..], msg[..]);
 698
 699                         if i == 0 {
 700                                 assert_eq!(res, hex::decode("cf2b30ddf0cf3f80e7c35a6e6730b59fe802473180f396d88a8fb0db8cbcf25d2f214cf9ea1d95").unwrap());
 701                         } else if i == 1 {
 702                                 assert_eq!(res, hex::decode("72887022101f0b6753e0c7de21657d35a4cb2a1f5cde2650528bbc8f837d0f0d7ad833b1a256a1").unwrap());
 703                         } else if i == 500 {
 704                                 assert_eq!(res, hex::decode("178cb9d7387190fa34db9c2d50027d21793c9bc2d40b1e14dcf30ebeeeb220f48364f7a4c68bf8").unwrap());
 705                         } else if i == 501 {
 706                                 assert_eq!(res, hex::decode("1b186c57d44eb6de4c057c49940d79bb838a145cb528d6e8fd26dbe50a60ca2c104b56b60e45bd").unwrap());
 707                         } else if i == 1000 {
 708                                 assert_eq!(res, hex::decode("4a2f3cc3b5e78ddb83dcb426d9863d9d9a723b0337c89dd0b005d89f8d3c05c52b76b29b740f09").unwrap());
 709                         } else if i == 1001 {
 710                                 assert_eq!(res, hex::decode("2ecd8c8a5629d0d02ab457a0fdd0f7b90a192cd46be5ecb6ca570bfc5e268338b1a16cf4ef2d36").unwrap());
 711                         }
 712                 }
 713         }
 714
 715         #[test]
 716         fn max_msg_len_limit_value() {
 717                 assert_eq!(LN_MAX_MSG_LEN, 65535);
 718                 assert_eq!(LN_MAX_MSG_LEN, ::core::u16::MAX as usize);
 719         }
 720
 721         #[test]
 722         #[should_panic(expected = "Attempted to encrypt message longer than 65535 bytes!")]
 723         fn max_message_len_encryption() {
 724                 let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 725                 let msg = [4u8; LN_MAX_MSG_LEN + 1];
 726                 outbound_peer.encrypt_message(&msg);
 727         }
 728
 729         #[test]
 730         #[should_panic(expected = "Attempted to decrypt message longer than 65535 + 16 bytes!")]
 731         fn max_message_len_decryption() {
 732                 let mut inbound_peer = get_inbound_peer_for_test_vectors();
 733
 734                 // MSG should not exceed LN_MAX_MSG_LEN + 16
 735                 let msg = [4u8; LN_MAX_MSG_LEN + 17];
 736                 inbound_peer.decrypt_message(&msg).unwrap();
 737         }
 738 }