_ 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 prelude::*;
  11
  12 use ln::msgs::LightningError;
  13 use ln::msgs;
  14
  15 use bitcoin::hashes::{Hash, HashEngine, Hmac, HmacEngine};
  16 use bitcoin::hashes::sha256::Hash as Sha256;
  17
  18 use bitcoin::secp256k1::Secp256k1;
  19 use bitcoin::secp256k1::key::{PublicKey,SecretKey};
  20 use bitcoin::secp256k1::ecdh::SharedSecret;
  21 use bitcoin::secp256k1;
  22
  23 use util::chacha20poly1305rfc::ChaCha20Poly1305RFC;
  24 use util::byte_utils;
  25 use bitcoin::hashes::hex::ToHex;
  26
  27 /// Maximum Lightning message data length according to
  28 /// [BOLT-8](https://github.com/lightningnetwork/lightning-rfc/blob/v1.0/08-transport.md#lightning-message-specification)
  29 /// and [BOLT-1](https://github.com/lightningnetwork/lightning-rfc/blob/master/01-messaging.md#lightning-message-format):
  30 pub const LN_MAX_MSG_LEN: usize = ::core::u16::MAX as usize; // Must be equal to 65535
  31
  32 // Sha256("Noise_XK_secp256k1_ChaChaPoly_SHA256")
  33 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];
  34 // Sha256(NOISE_CK || "lightning")
  35 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];
  36
  37 pub enum NextNoiseStep {
  38         ActOne,
  39         ActTwo,
  40         ActThree,
  41         NoiseComplete,
  42 }
  43
  44 #[derive(PartialEq)]
  45 enum NoiseStep {
  46         PreActOne,
  47         PostActOne,
  48         PostActTwo,
  49         // When done swap noise_state for NoiseState::Finished
  50 }
  51
  52 struct BidirectionalNoiseState {
  53         h: [u8; 32],
  54         ck: [u8; 32],
  55 }
  56 enum DirectionalNoiseState {
  57         Outbound {
  58                 ie: SecretKey,
  59         },
  60         Inbound {
  61                 ie: Option<PublicKey>, // filled in if state >= PostActOne
  62                 re: Option<SecretKey>, // filled in if state >= PostActTwo
  63                 temp_k2: Option<[u8; 32]>, // filled in if state >= PostActTwo
  64         }
  65 }
  66 enum NoiseState {
  67         InProgress {
  68                 state: NoiseStep,
  69                 directional_state: DirectionalNoiseState,
  70                 bidirectional_state: BidirectionalNoiseState,
  71         },
  72         Finished {
  73                 sk: [u8; 32],
  74                 sn: u64,
  75                 sck: [u8; 32],
  76                 rk: [u8; 32],
  77                 rn: u64,
  78                 rck: [u8; 32],
  79         }
  80 }
  81
  82 pub struct PeerChannelEncryptor {
  83         secp_ctx: Secp256k1<secp256k1::SignOnly>,
  84         their_node_id: Option<PublicKey>, // filled in for outbound, or inbound after noise_state is Finished
  85
  86         noise_state: NoiseState,
  87 }
  88
  89 impl PeerChannelEncryptor {
  90         pub fn new_outbound(their_node_id: PublicKey, ephemeral_key: SecretKey) -> PeerChannelEncryptor {
  91                 let secp_ctx = Secp256k1::signing_only();
  92
  93                 let mut sha = Sha256::engine();
  94                 sha.input(&NOISE_H);
  95                 sha.input(&their_node_id.serialize()[..]);
  96                 let h = Sha256::from_engine(sha).into_inner();
  97
  98                 PeerChannelEncryptor {
  99                         their_node_id: Some(their_node_id),
 100                         secp_ctx,
 101                         noise_state: NoiseState::InProgress {
 102                                 state: NoiseStep::PreActOne,
 103                                 directional_state: DirectionalNoiseState::Outbound {
 104                                         ie: ephemeral_key,
 105                                 },
 106                                 bidirectional_state: BidirectionalNoiseState {
 107                                         h,
 108                                         ck: NOISE_CK,
 109                                 },
 110                         }
 111                 }
 112         }
 113
 114         pub fn new_inbound(our_node_secret: &SecretKey) -> PeerChannelEncryptor {
 115                 let secp_ctx = Secp256k1::signing_only();
 116
 117                 let mut sha = Sha256::engine();
 118                 sha.input(&NOISE_H);
 119                 let our_node_id = PublicKey::from_secret_key(&secp_ctx, our_node_secret);
 120                 sha.input(&our_node_id.serialize()[..]);
 121                 let h = Sha256::from_engine(sha).into_inner();
 122
 123                 PeerChannelEncryptor {
 124                         their_node_id: None,
 125                         secp_ctx,
 126                         noise_state: NoiseState::InProgress {
 127                                 state: NoiseStep::PreActOne,
 128                                 directional_state: DirectionalNoiseState::Inbound {
 129                                         ie: None,
 130                                         re: None,
 131                                         temp_k2: None,
 132                                 },
 133                                 bidirectional_state: BidirectionalNoiseState {
 134                                         h,
 135                                         ck: NOISE_CK,
 136                                 },
 137                         }
 138                 }
 139         }
 140
 141         #[inline]
 142         fn encrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], plaintext: &[u8]) {
 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                 let mut tag = [0; 16];
 148                 chacha.encrypt(plaintext, &mut res[0..plaintext.len()], &mut tag);
 149                 res[plaintext.len()..].copy_from_slice(&tag);
 150         }
 151
 152         #[inline]
 153         fn decrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], cyphertext: &[u8]) -> Result<(), LightningError> {
 154                 let mut nonce = [0; 12];
 155                 nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
 156
 157                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 158                 if !chacha.decrypt(&cyphertext[0..cyphertext.len() - 16], res, &cyphertext[cyphertext.len() - 16..]) {
 159                         return Err(LightningError{err: "Bad MAC".to_owned(), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 160                 }
 161                 Ok(())
 162         }
 163
 164         fn hkdf_extract_expand(salt: &[u8], ikm: &[u8]) -> ([u8; 32], [u8; 32]) {
 165                 let mut hmac = HmacEngine::<Sha256>::new(salt);
 166                 hmac.input(ikm);
 167                 let prk = Hmac::from_engine(hmac).into_inner();
 168                 let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
 169                 hmac.input(&[1; 1]);
 170                 let t1 = Hmac::from_engine(hmac).into_inner();
 171                 let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
 172                 hmac.input(&t1);
 173                 hmac.input(&[2; 1]);
 174                 (t1, Hmac::from_engine(hmac).into_inner())
 175         }
 176
 177         #[inline]
 178         fn hkdf(state: &mut BidirectionalNoiseState, ss: SharedSecret) -> [u8; 32] {
 179                 let (t1, t2) = Self::hkdf_extract_expand(&state.ck, &ss[..]);
 180                 state.ck = t1;
 181                 t2
 182         }
 183
 184         #[inline]
 185         fn outbound_noise_act<T: secp256k1::Signing>(secp_ctx: &Secp256k1<T>, state: &mut BidirectionalNoiseState, our_key: &SecretKey, their_key: &PublicKey) -> ([u8; 50], [u8; 32]) {
 186                 let our_pub = PublicKey::from_secret_key(secp_ctx, &our_key);
 187
 188                 let mut sha = Sha256::engine();
 189                 sha.input(&state.h);
 190                 sha.input(&our_pub.serialize()[..]);
 191                 state.h = Sha256::from_engine(sha).into_inner();
 192
 193                 let ss = SharedSecret::new(&their_key, &our_key);
 194                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 195
 196                 let mut res = [0; 50];
 197                 res[1..34].copy_from_slice(&our_pub.serialize()[..]);
 198                 PeerChannelEncryptor::encrypt_with_ad(&mut res[34..], 0, &temp_k, &state.h, &[0; 0]);
 199
 200                 let mut sha = Sha256::engine();
 201                 sha.input(&state.h);
 202                 sha.input(&res[34..]);
 203                 state.h = Sha256::from_engine(sha).into_inner();
 204
 205                 (res, temp_k)
 206         }
 207
 208         #[inline]
 209         fn inbound_noise_act(state: &mut BidirectionalNoiseState, act: &[u8], our_key: &SecretKey) -> Result<(PublicKey, [u8; 32]), LightningError> {
 210                 assert_eq!(act.len(), 50);
 211
 212                 if act[0] != 0 {
 213                         return Err(LightningError{err: format!("Unknown handshake version number {}", act[0]), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 214                 }
 215
 216                 let their_pub = match PublicKey::from_slice(&act[1..34]) {
 217                         Err(_) => return Err(LightningError{err: format!("Invalid public key {}", &act[1..34].to_hex()), action: msgs::ErrorAction::DisconnectPeer{ msg: None }}),
 218                         Ok(key) => key,
 219                 };
 220
 221                 let mut sha = Sha256::engine();
 222                 sha.input(&state.h);
 223                 sha.input(&their_pub.serialize()[..]);
 224                 state.h = Sha256::from_engine(sha).into_inner();
 225
 226                 let ss = SharedSecret::new(&their_pub, &our_key);
 227                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 228
 229                 let mut dec = [0; 0];
 230                 PeerChannelEncryptor::decrypt_with_ad(&mut dec, 0, &temp_k, &state.h, &act[34..])?;
 231
 232                 let mut sha = Sha256::engine();
 233                 sha.input(&state.h);
 234                 sha.input(&act[34..]);
 235                 state.h = Sha256::from_engine(sha).into_inner();
 236
 237                 Ok((their_pub, temp_k))
 238         }
 239
 240         pub fn get_act_one(&mut self) -> [u8; 50] {
 241                 match self.noise_state {
 242                         NoiseState::InProgress { ref mut state, ref directional_state, ref mut bidirectional_state } =>
 243                                 match directional_state {
 244                                         &DirectionalNoiseState::Outbound { ref ie } => {
 245                                                 if *state != NoiseStep::PreActOne {
 246                                                         panic!("Requested act at wrong step");
 247                                                 }
 248
 249                                                 let (res, _) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &ie, &self.their_node_id.unwrap());
 250                                                 *state = NoiseStep::PostActOne;
 251                                                 res
 252                                         },
 253                                         _ => panic!("Wrong direction for act"),
 254                                 },
 255                         _ => panic!("Cannot get act one after noise handshake completes"),
 256                 }
 257         }
 258
 259         pub fn process_act_one_with_keys(&mut self, act_one: &[u8], our_node_secret: &SecretKey, our_ephemeral: SecretKey) -> Result<[u8; 50], LightningError> {
 260                 assert_eq!(act_one.len(), 50);
 261
 262                 match self.noise_state {
 263                         NoiseState::InProgress { ref mut state, ref mut directional_state, ref mut bidirectional_state } =>
 264                                 match directional_state {
 265                                         &mut DirectionalNoiseState::Inbound { ref mut ie, ref mut re, ref mut temp_k2 } => {
 266                                                 if *state != NoiseStep::PreActOne {
 267                                                         panic!("Requested act at wrong step");
 268                                                 }
 269
 270                                                 let (their_pub, _) = PeerChannelEncryptor::inbound_noise_act(bidirectional_state, act_one, &our_node_secret)?;
 271                                                 ie.get_or_insert(their_pub);
 272
 273                                                 re.get_or_insert(our_ephemeral);
 274
 275                                                 let (res, temp_k) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &re.unwrap(), &ie.unwrap());
 276                                                 *temp_k2 = Some(temp_k);
 277                                                 *state = NoiseStep::PostActTwo;
 278                                                 Ok(res)
 279                                         },
 280                                         _ => panic!("Wrong direction for act"),
 281                                 },
 282                         _ => panic!("Cannot get act one after noise handshake completes"),
 283                 }
 284         }
 285
 286         pub fn process_act_two(&mut self, act_two: &[u8], our_node_secret: &SecretKey) -> Result<([u8; 66], PublicKey), LightningError> {
 287                 assert_eq!(act_two.len(), 50);
 288
 289                 let final_hkdf;
 290                 let ck;
 291                 let res: [u8; 66] = match self.noise_state {
 292                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 293                                 match directional_state {
 294                                         &DirectionalNoiseState::Outbound { ref ie } => {
 295                                                 if *state != NoiseStep::PostActOne {
 296                                                         panic!("Requested act at wrong step");
 297                                                 }
 298
 299                                                 let (re, temp_k2) = PeerChannelEncryptor::inbound_noise_act(bidirectional_state, act_two, &ie)?;
 300
 301                                                 let mut res = [0; 66];
 302                                                 let our_node_id = PublicKey::from_secret_key(&self.secp_ctx, &our_node_secret);
 303
 304                                                 PeerChannelEncryptor::encrypt_with_ad(&mut res[1..50], 1, &temp_k2, &bidirectional_state.h, &our_node_id.serialize()[..]);
 305
 306                                                 let mut sha = Sha256::engine();
 307                                                 sha.input(&bidirectional_state.h);
 308                                                 sha.input(&res[1..50]);
 309                                                 bidirectional_state.h = Sha256::from_engine(sha).into_inner();
 310
 311                                                 let ss = SharedSecret::new(&re, our_node_secret);
 312                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 313
 314                                                 PeerChannelEncryptor::encrypt_with_ad(&mut res[50..], 0, &temp_k, &bidirectional_state.h, &[0; 0]);
 315                                                 final_hkdf = Self::hkdf_extract_expand(&bidirectional_state.ck, &[0; 0]);
 316                                                 ck = bidirectional_state.ck.clone();
 317                                                 res
 318                                         },
 319                                         _ => panic!("Wrong direction for act"),
 320                                 },
 321                         _ => panic!("Cannot get act one after noise handshake completes"),
 322                 };
 323
 324                 let (sk, rk) = final_hkdf;
 325                 self.noise_state = NoiseState::Finished {
 326                         sk,
 327                         sn: 0,
 328                         sck: ck.clone(),
 329                         rk,
 330                         rn: 0,
 331                         rck: ck,
 332                 };
 333
 334                 Ok((res, self.their_node_id.unwrap().clone()))
 335         }
 336
 337         pub fn process_act_three(&mut self, act_three: &[u8]) -> Result<PublicKey, LightningError> {
 338                 assert_eq!(act_three.len(), 66);
 339
 340                 let final_hkdf;
 341                 let ck;
 342                 match self.noise_state {
 343                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 344                                 match directional_state {
 345                                         &DirectionalNoiseState::Inbound { ie: _, ref re, ref temp_k2 } => {
 346                                                 if *state != NoiseStep::PostActTwo {
 347                                                         panic!("Requested act at wrong step");
 348                                                 }
 349                                                 if act_three[0] != 0 {
 350                                                         return Err(LightningError{err: format!("Unknown handshake version number {}", act_three[0]), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 351                                                 }
 352
 353                                                 let mut their_node_id = [0; 33];
 354                                                 PeerChannelEncryptor::decrypt_with_ad(&mut their_node_id, 1, &temp_k2.unwrap(), &bidirectional_state.h, &act_three[1..50])?;
 355                                                 self.their_node_id = Some(match PublicKey::from_slice(&their_node_id) {
 356                                                         Ok(key) => key,
 357                                                         Err(_) => return Err(LightningError{err: format!("Bad node_id from peer, {}", &their_node_id.to_hex()), action: msgs::ErrorAction::DisconnectPeer{ msg: None }}),
 358                                                 });
 359
 360                                                 let mut sha = Sha256::engine();
 361                                                 sha.input(&bidirectional_state.h);
 362                                                 sha.input(&act_three[1..50]);
 363                                                 bidirectional_state.h = Sha256::from_engine(sha).into_inner();
 364
 365                                                 let ss = SharedSecret::new(&self.their_node_id.unwrap(), &re.unwrap());
 366                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 367
 368                                                 PeerChannelEncryptor::decrypt_with_ad(&mut [0; 0], 0, &temp_k, &bidirectional_state.h, &act_three[50..])?;
 369                                                 final_hkdf = Self::hkdf_extract_expand(&bidirectional_state.ck, &[0; 0]);
 370                                                 ck = bidirectional_state.ck.clone();
 371                                         },
 372                                         _ => panic!("Wrong direction for act"),
 373                                 },
 374                         _ => panic!("Cannot get act one after noise handshake completes"),
 375                 }
 376
 377                 let (rk, sk) = final_hkdf;
 378                 self.noise_state = NoiseState::Finished {
 379                         sk,
 380                         sn: 0,
 381                         sck: ck.clone(),
 382                         rk,
 383                         rn: 0,
 384                         rck: ck,
 385                 };
 386
 387                 Ok(self.their_node_id.unwrap().clone())
 388         }
 389
 390         /// Encrypts the given message, returning the encrypted version
 391         /// panics if msg.len() > 65535 or Noise handshake has not finished.
 392         pub fn encrypt_message(&mut self, msg: &[u8]) -> Vec<u8> {
 393                 if msg.len() > LN_MAX_MSG_LEN {
 394                         panic!("Attempted to encrypt message longer than 65535 bytes!");
 395                 }
 396
 397                 let mut res = Vec::with_capacity(msg.len() + 16*2 + 2);
 398                 res.resize(msg.len() + 16*2 + 2, 0);
 399
 400                 match self.noise_state {
 401                         NoiseState::Finished { ref mut sk, ref mut sn, ref mut sck, rk: _, rn: _, rck: _ } => {
 402                                 if *sn >= 1000 {
 403                                         let (new_sck, new_sk) = Self::hkdf_extract_expand(sck, sk);
 404                                         *sck = new_sck;
 405                                         *sk = new_sk;
 406                                         *sn = 0;
 407                                 }
 408
 409                                 Self::encrypt_with_ad(&mut res[0..16+2], *sn, sk, &[0; 0], &byte_utils::be16_to_array(msg.len() as u16));
 410                                 *sn += 1;
 411
 412                                 Self::encrypt_with_ad(&mut res[16+2..], *sn, sk, &[0; 0], msg);
 413                                 *sn += 1;
 414                         },
 415                         _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
 416                 }
 417
 418                 res
 419         }
 420
 421         /// Decrypts a message length header from the remote peer.
 422         /// panics if noise handshake has not yet finished or msg.len() != 18
 423         pub fn decrypt_length_header(&mut self, msg: &[u8]) -> Result<u16, LightningError> {
 424                 assert_eq!(msg.len(), 16+2);
 425
 426                 match self.noise_state {
 427                         NoiseState::Finished { sk: _, sn: _, sck: _, ref mut rk, ref mut rn, ref mut rck } => {
 428                                 if *rn >= 1000 {
 429                                         let (new_rck, new_rk) = Self::hkdf_extract_expand(rck, rk);
 430                                         *rck = new_rck;
 431                                         *rk = new_rk;
 432                                         *rn = 0;
 433                                 }
 434
 435                                 let mut res = [0; 2];
 436                                 Self::decrypt_with_ad(&mut res, *rn, rk, &[0; 0], msg)?;
 437                                 *rn += 1;
 438                                 Ok(byte_utils::slice_to_be16(&res))
 439                         },
 440                         _ => panic!("Tried to decrypt a message prior to noise handshake completion"),
 441                 }
 442         }
 443
 444         /// Decrypts the given message.
 445         /// panics if msg.len() > 65535 + 16
 446         pub fn decrypt_message(&mut self, msg: &[u8]) -> Result<Vec<u8>, LightningError> {
 447                 if msg.len() > LN_MAX_MSG_LEN + 16 {
 448                         panic!("Attempted to decrypt message longer than 65535 + 16 bytes!");
 449                 }
 450
 451                 match self.noise_state {
 452                         NoiseState::Finished { sk: _, sn: _, sck: _, ref rk, ref mut rn, rck: _ } => {
 453                                 let mut res = Vec::with_capacity(msg.len() - 16);
 454                                 res.resize(msg.len() - 16, 0);
 455                                 Self::decrypt_with_ad(&mut res[..], *rn, rk, &[0; 0], msg)?;
 456                                 *rn += 1;
 457
 458                                 Ok(res)
 459                         },
 460                         _ => panic!("Tried to decrypt a message prior to noise handshake completion"),
 461                 }
 462         }
 463
 464         pub fn get_noise_step(&self) -> NextNoiseStep {
 465                 match self.noise_state {
 466                         NoiseState::InProgress {ref state, ..} => {
 467                                 match state {
 468                                         &NoiseStep::PreActOne => NextNoiseStep::ActOne,
 469                                         &NoiseStep::PostActOne => NextNoiseStep::ActTwo,
 470                                         &NoiseStep::PostActTwo => NextNoiseStep::ActThree,
 471                                 }
 472                         },
 473                         NoiseState::Finished {..} => NextNoiseStep::NoiseComplete,
 474                 }
 475         }
 476
 477         pub fn is_ready_for_encryption(&self) -> bool {
 478                 match self.noise_state {
 479                         NoiseState::InProgress {..} => { false },
 480                         NoiseState::Finished {..} => { true }
 481                 }
 482         }
 483 }
 484
 485 #[cfg(test)]
 486 mod tests {
 487         use super::LN_MAX_MSG_LEN;
 488
 489         use bitcoin::secp256k1::key::{PublicKey,SecretKey};
 490
 491         use hex;
 492
 493         use ln::peer_channel_encryptor::{PeerChannelEncryptor,NoiseState};
 494
 495         fn get_outbound_peer_for_initiator_test_vectors() -> PeerChannelEncryptor {
 496                 let their_node_id = PublicKey::from_slice(&hex::decode("028d7500dd4c12685d1f568b4c2b5048e8534b873319f3a8daa612b469132ec7f7").unwrap()[..]).unwrap();
 497
 498                 let mut outbound_peer = PeerChannelEncryptor::new_outbound(their_node_id, SecretKey::from_slice(&hex::decode("1212121212121212121212121212121212121212121212121212121212121212").unwrap()[..]).unwrap());
 499                 assert_eq!(outbound_peer.get_act_one()[..], hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap()[..]);
 500                 outbound_peer
 501         }
 502
 503         fn get_inbound_peer_for_test_vectors() -> PeerChannelEncryptor {
 504                 // transport-responder successful handshake
 505                 let our_node_id = SecretKey::from_slice(&hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 506                 let our_ephemeral = SecretKey::from_slice(&hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 507
 508                 let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 509
 510                 let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 511                 assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 512
 513                 let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 514                 // test vector doesn't specify the initiator static key, but it's the same as the one
 515                 // from transport-initiator successful handshake
 516                 assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex::decode("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]);
 517
 518                 match inbound_peer.noise_state {
 519                         NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 520                                 assert_eq!(sk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 521                                 assert_eq!(sn, 0);
 522                                 assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 523                                 assert_eq!(rk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 524                                 assert_eq!(rn, 0);
 525                                 assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 526                         },
 527                         _ => panic!()
 528                 }
 529
 530                 inbound_peer
 531         }
 532
 533         #[test]
 534         fn noise_initiator_test_vectors() {
 535                 let our_node_id = SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 536
 537                 {
 538                         // transport-initiator successful handshake
 539                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 540
 541                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 542                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 543
 544                         match outbound_peer.noise_state {
 545                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 546                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 547                                         assert_eq!(sn, 0);
 548                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 549                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 550                                         assert_eq!(rn, 0);
 551                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 552                                 },
 553                                 _ => panic!()
 554                         }
 555                 }
 556                 {
 557                         // transport-initiator act2 short read test
 558                         // Can't actually test this cause process_act_two requires you pass the right length!
 559                 }
 560                 {
 561                         // transport-initiator act2 bad version test
 562                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 563
 564                         let act_two = hex::decode("0102466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 565                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 566                 }
 567
 568                 {
 569                         // transport-initiator act2 bad key serialization test
 570                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 571
 572                         let act_two = hex::decode("0004466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 573                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 574                 }
 575
 576                 {
 577                         // transport-initiator act2 bad MAC test
 578                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 579
 580                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730af").unwrap().to_vec();
 581                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 582                 }
 583         }
 584
 585         #[test]
 586         fn noise_responder_test_vectors() {
 587                 let our_node_id = SecretKey::from_slice(&hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 588                 let our_ephemeral = SecretKey::from_slice(&hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 589
 590                 {
 591                         let _ = get_inbound_peer_for_test_vectors();
 592                 }
 593                 {
 594                         // transport-responder act1 short read test
 595                         // Can't actually test this cause process_act_one requires you pass the right length!
 596                 }
 597                 {
 598                         // transport-responder act1 bad version test
 599                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 600
 601                         let act_one = hex::decode("01036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 602                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 603                 }
 604                 {
 605                         // transport-responder act1 bad key serialization test
 606                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 607
 608                         let act_one =hex::decode("00046360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 609                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 610                 }
 611                 {
 612                         // transport-responder act1 bad MAC test
 613                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 614
 615                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6b").unwrap().to_vec();
 616                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 617                 }
 618                 {
 619                         // transport-responder act3 bad version test
 620                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 621
 622                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 623                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 624
 625                         let act_three = hex::decode("01b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 626                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 627                 }
 628                 {
 629                         // transport-responder act3 short read test
 630                         // Can't actually test this cause process_act_three requires you pass the right length!
 631                 }
 632                 {
 633                         // transport-responder act3 bad MAC for ciphertext test
 634                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 635
 636                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 637                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 638
 639                         let act_three = hex::decode("00c9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 640                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 641                 }
 642                 {
 643                         // transport-responder act3 bad rs test
 644                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 645
 646                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 647                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 648
 649                         let act_three = hex::decode("00bfe3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa2235536ad09a8ee351870c2bb7f78b754a26c6cef79a98d25139c856d7efd252c2ae73c").unwrap().to_vec();
 650                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 651                 }
 652                 {
 653                         // transport-responder act3 bad MAC test
 654                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 655
 656                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 657                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 658
 659                         let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139bb").unwrap().to_vec();
 660                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 661                 }
 662         }
 663
 664
 665         #[test]
 666         fn message_encryption_decryption_test_vectors() {
 667                 // We use the same keys as the initiator and responder test vectors, so we copy those tests
 668                 // here and use them to encrypt.
 669                 let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 670
 671                 {
 672                         let our_node_id = SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 673
 674                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 675                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 676
 677                         match outbound_peer.noise_state {
 678                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 679                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 680                                         assert_eq!(sn, 0);
 681                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 682                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 683                                         assert_eq!(rn, 0);
 684                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 685                                 },
 686                                 _ => panic!()
 687                         }
 688                 }
 689
 690                 let mut inbound_peer = get_inbound_peer_for_test_vectors();
 691
 692                 for i in 0..1005 {
 693                         let msg = [0x68, 0x65, 0x6c, 0x6c, 0x6f];
 694                         let res = outbound_peer.encrypt_message(&msg);
 695                         assert_eq!(res.len(), 5 + 2*16 + 2);
 696
 697                         let len_header = res[0..2+16].to_vec();
 698                         assert_eq!(inbound_peer.decrypt_length_header(&len_header[..]).unwrap() as usize, msg.len());
 699                         assert_eq!(inbound_peer.decrypt_message(&res[2+16..]).unwrap()[..], msg[..]);
 700
 701                         if i == 0 {
 702                                 assert_eq!(res, hex::decode("cf2b30ddf0cf3f80e7c35a6e6730b59fe802473180f396d88a8fb0db8cbcf25d2f214cf9ea1d95").unwrap());
 703                         } else if i == 1 {
 704                                 assert_eq!(res, hex::decode("72887022101f0b6753e0c7de21657d35a4cb2a1f5cde2650528bbc8f837d0f0d7ad833b1a256a1").unwrap());
 705                         } else if i == 500 {
 706                                 assert_eq!(res, hex::decode("178cb9d7387190fa34db9c2d50027d21793c9bc2d40b1e14dcf30ebeeeb220f48364f7a4c68bf8").unwrap());
 707                         } else if i == 501 {
 708                                 assert_eq!(res, hex::decode("1b186c57d44eb6de4c057c49940d79bb838a145cb528d6e8fd26dbe50a60ca2c104b56b60e45bd").unwrap());
 709                         } else if i == 1000 {
 710                                 assert_eq!(res, hex::decode("4a2f3cc3b5e78ddb83dcb426d9863d9d9a723b0337c89dd0b005d89f8d3c05c52b76b29b740f09").unwrap());
 711                         } else if i == 1001 {
 712                                 assert_eq!(res, hex::decode("2ecd8c8a5629d0d02ab457a0fdd0f7b90a192cd46be5ecb6ca570bfc5e268338b1a16cf4ef2d36").unwrap());
 713                         }
 714                 }
 715         }
 716
 717         #[test]
 718         fn max_msg_len_limit_value() {
 719                 assert_eq!(LN_MAX_MSG_LEN, 65535);
 720                 assert_eq!(LN_MAX_MSG_LEN, ::core::u16::MAX as usize);
 721         }
 722
 723         #[test]
 724         #[should_panic(expected = "Attempted to encrypt message longer than 65535 bytes!")]
 725         fn max_message_len_encryption() {
 726                 let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 727                 let msg = [4u8; LN_MAX_MSG_LEN + 1];
 728                 outbound_peer.encrypt_message(&msg);
 729         }
 730
 731         #[test]
 732         #[should_panic(expected = "Attempted to decrypt message longer than 65535 + 16 bytes!")]
 733         fn max_message_len_decryption() {
 734                 let mut inbound_peer = get_inbound_peer_for_test_vectors();
 735
 736                 // MSG should not exceed LN_MAX_MSG_LEN + 16
 737                 let msg = [4u8; LN_MAX_MSG_LEN + 17];
 738                 inbound_peer.decrypt_message(&msg).unwrap();
 739         }
 740 }