_ 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 bitcoin::hashes::hex::ToHex;
  25
  26 /// Maximum Lightning message data length according to
  27 /// [BOLT-8](https://github.com/lightningnetwork/lightning-rfc/blob/v1.0/08-transport.md#lightning-message-specification)
  28 /// and [BOLT-1](https://github.com/lightningnetwork/lightning-rfc/blob/master/01-messaging.md#lightning-message-format):
  29 pub const LN_MAX_MSG_LEN: usize = ::core::u16::MAX as usize; // Must be equal to 65535
  30
  31 // Sha256("Noise_XK_secp256k1_ChaChaPoly_SHA256")
  32 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];
  33 // Sha256(NOISE_CK || "lightning")
  34 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];
  35
  36 pub enum NextNoiseStep {
  37         ActOne,
  38         ActTwo,
  39         ActThree,
  40         NoiseComplete,
  41 }
  42
  43 #[derive(PartialEq)]
  44 enum NoiseStep {
  45         PreActOne,
  46         PostActOne,
  47         PostActTwo,
  48         // When done swap noise_state for NoiseState::Finished
  49 }
  50
  51 struct BidirectionalNoiseState {
  52         h: [u8; 32],
  53         ck: [u8; 32],
  54 }
  55 enum DirectionalNoiseState {
  56         Outbound {
  57                 ie: SecretKey,
  58         },
  59         Inbound {
  60                 ie: Option<PublicKey>, // filled in if state >= PostActOne
  61                 re: Option<SecretKey>, // filled in if state >= PostActTwo
  62                 temp_k2: Option<[u8; 32]>, // filled in if state >= PostActTwo
  63         }
  64 }
  65 enum NoiseState {
  66         InProgress {
  67                 state: NoiseStep,
  68                 directional_state: DirectionalNoiseState,
  69                 bidirectional_state: BidirectionalNoiseState,
  70         },
  71         Finished {
  72                 sk: [u8; 32],
  73                 sn: u64,
  74                 sck: [u8; 32],
  75                 rk: [u8; 32],
  76                 rn: u64,
  77                 rck: [u8; 32],
  78         }
  79 }
  80
  81 pub struct PeerChannelEncryptor {
  82         secp_ctx: Secp256k1<secp256k1::SignOnly>,
  83         their_node_id: Option<PublicKey>, // filled in for outbound, or inbound after noise_state is Finished
  84
  85         noise_state: NoiseState,
  86 }
  87
  88 impl PeerChannelEncryptor {
  89         pub fn new_outbound(their_node_id: PublicKey, ephemeral_key: SecretKey) -> PeerChannelEncryptor {
  90                 let secp_ctx = Secp256k1::signing_only();
  91
  92                 let mut sha = Sha256::engine();
  93                 sha.input(&NOISE_H);
  94                 sha.input(&their_node_id.serialize()[..]);
  95                 let h = Sha256::from_engine(sha).into_inner();
  96
  97                 PeerChannelEncryptor {
  98                         their_node_id: Some(their_node_id),
  99                         secp_ctx,
 100                         noise_state: NoiseState::InProgress {
 101                                 state: NoiseStep::PreActOne,
 102                                 directional_state: DirectionalNoiseState::Outbound {
 103                                         ie: ephemeral_key,
 104                                 },
 105                                 bidirectional_state: BidirectionalNoiseState {
 106                                         h,
 107                                         ck: NOISE_CK,
 108                                 },
 109                         }
 110                 }
 111         }
 112
 113         pub fn new_inbound(our_node_secret: &SecretKey) -> PeerChannelEncryptor {
 114                 let secp_ctx = Secp256k1::signing_only();
 115
 116                 let mut sha = Sha256::engine();
 117                 sha.input(&NOISE_H);
 118                 let our_node_id = PublicKey::from_secret_key(&secp_ctx, our_node_secret);
 119                 sha.input(&our_node_id.serialize()[..]);
 120                 let h = Sha256::from_engine(sha).into_inner();
 121
 122                 PeerChannelEncryptor {
 123                         their_node_id: None,
 124                         secp_ctx,
 125                         noise_state: NoiseState::InProgress {
 126                                 state: NoiseStep::PreActOne,
 127                                 directional_state: DirectionalNoiseState::Inbound {
 128                                         ie: None,
 129                                         re: None,
 130                                         temp_k2: None,
 131                                 },
 132                                 bidirectional_state: BidirectionalNoiseState {
 133                                         h,
 134                                         ck: NOISE_CK,
 135                                 },
 136                         }
 137                 }
 138         }
 139
 140         #[inline]
 141         fn encrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], plaintext: &[u8]) {
 142                 let mut nonce = [0; 12];
 143                 nonce[4..].copy_from_slice(&n.to_le_bytes()[..]);
 144
 145                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 146                 let mut tag = [0; 16];
 147                 chacha.encrypt(plaintext, &mut res[0..plaintext.len()], &mut tag);
 148                 res[plaintext.len()..].copy_from_slice(&tag);
 149         }
 150
 151         #[inline]
 152         fn decrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], cyphertext: &[u8]) -> Result<(), LightningError> {
 153                 let mut nonce = [0; 12];
 154                 nonce[4..].copy_from_slice(&n.to_le_bytes()[..]);
 155
 156                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 157                 if !chacha.decrypt(&cyphertext[0..cyphertext.len() - 16], res, &cyphertext[cyphertext.len() - 16..]) {
 158                         return Err(LightningError{err: "Bad MAC".to_owned(), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 159                 }
 160                 Ok(())
 161         }
 162
 163         fn hkdf_extract_expand(salt: &[u8], ikm: &[u8]) -> ([u8; 32], [u8; 32]) {
 164                 let mut hmac = HmacEngine::<Sha256>::new(salt);
 165                 hmac.input(ikm);
 166                 let prk = Hmac::from_engine(hmac).into_inner();
 167                 let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
 168                 hmac.input(&[1; 1]);
 169                 let t1 = Hmac::from_engine(hmac).into_inner();
 170                 let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
 171                 hmac.input(&t1);
 172                 hmac.input(&[2; 1]);
 173                 (t1, Hmac::from_engine(hmac).into_inner())
 174         }
 175
 176         #[inline]
 177         fn hkdf(state: &mut BidirectionalNoiseState, ss: SharedSecret) -> [u8; 32] {
 178                 let (t1, t2) = Self::hkdf_extract_expand(&state.ck, &ss[..]);
 179                 state.ck = t1;
 180                 t2
 181         }
 182
 183         #[inline]
 184         fn outbound_noise_act<T: secp256k1::Signing>(secp_ctx: &Secp256k1<T>, state: &mut BidirectionalNoiseState, our_key: &SecretKey, their_key: &PublicKey) -> ([u8; 50], [u8; 32]) {
 185                 let our_pub = PublicKey::from_secret_key(secp_ctx, &our_key);
 186
 187                 let mut sha = Sha256::engine();
 188                 sha.input(&state.h);
 189                 sha.input(&our_pub.serialize()[..]);
 190                 state.h = Sha256::from_engine(sha).into_inner();
 191
 192                 let ss = SharedSecret::new(&their_key, &our_key);
 193                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 194
 195                 let mut res = [0; 50];
 196                 res[1..34].copy_from_slice(&our_pub.serialize()[..]);
 197                 PeerChannelEncryptor::encrypt_with_ad(&mut res[34..], 0, &temp_k, &state.h, &[0; 0]);
 198
 199                 let mut sha = Sha256::engine();
 200                 sha.input(&state.h);
 201                 sha.input(&res[34..]);
 202                 state.h = Sha256::from_engine(sha).into_inner();
 203
 204                 (res, temp_k)
 205         }
 206
 207         #[inline]
 208         fn inbound_noise_act(state: &mut BidirectionalNoiseState, act: &[u8], our_key: &SecretKey) -> Result<(PublicKey, [u8; 32]), LightningError> {
 209                 assert_eq!(act.len(), 50);
 210
 211                 if act[0] != 0 {
 212                         return Err(LightningError{err: format!("Unknown handshake version number {}", act[0]), action: msgs::ErrorAction::DisconnectPeer{ msg: None }});
 213                 }
 214
 215                 let their_pub = match PublicKey::from_slice(&act[1..34]) {
 216                         Err(_) => return Err(LightningError{err: format!("Invalid public key {}", &act[1..34].to_hex()), action: msgs::ErrorAction::DisconnectPeer{ msg: None }}),
 217                         Ok(key) => key,
 218                 };
 219
 220                 let mut sha = Sha256::engine();
 221                 sha.input(&state.h);
 222                 sha.input(&their_pub.serialize()[..]);
 223                 state.h = Sha256::from_engine(sha).into_inner();
 224
 225                 let ss = SharedSecret::new(&their_pub, &our_key);
 226                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 227
 228                 let mut dec = [0; 0];
 229                 PeerChannelEncryptor::decrypt_with_ad(&mut dec, 0, &temp_k, &state.h, &act[34..])?;
 230
 231                 let mut sha = Sha256::engine();
 232                 sha.input(&state.h);
 233                 sha.input(&act[34..]);
 234                 state.h = Sha256::from_engine(sha).into_inner();
 235
 236                 Ok((their_pub, temp_k))
 237         }
 238
 239         pub fn get_act_one(&mut self) -> [u8; 50] {
 240                 match self.noise_state {
 241                         NoiseState::InProgress { ref mut state, ref directional_state, ref mut bidirectional_state } =>
 242                                 match directional_state {
 243                                         &DirectionalNoiseState::Outbound { ref ie } => {
 244                                                 if *state != NoiseStep::PreActOne {
 245                                                         panic!("Requested act at wrong step");
 246                                                 }
 247
 248                                                 let (res, _) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &ie, &self.their_node_id.unwrap());
 249                                                 *state = NoiseStep::PostActOne;
 250                                                 res
 251                                         },
 252                                         _ => panic!("Wrong direction for act"),
 253                                 },
 254                         _ => panic!("Cannot get act one after noise handshake completes"),
 255                 }
 256         }
 257
 258         pub fn process_act_one_with_keys(&mut self, act_one: &[u8], our_node_secret: &SecretKey, our_ephemeral: SecretKey) -> Result<[u8; 50], LightningError> {
 259                 assert_eq!(act_one.len(), 50);
 260
 261                 match self.noise_state {
 262                         NoiseState::InProgress { ref mut state, ref mut directional_state, ref mut bidirectional_state } =>
 263                                 match directional_state {
 264                                         &mut DirectionalNoiseState::Inbound { ref mut ie, ref mut re, ref mut temp_k2 } => {
 265                                                 if *state != NoiseStep::PreActOne {
 266                                                         panic!("Requested act at wrong step");
 267                                                 }
 268
 269                                                 let (their_pub, _) = PeerChannelEncryptor::inbound_noise_act(bidirectional_state, act_one, &our_node_secret)?;
 270                                                 ie.get_or_insert(their_pub);
 271
 272                                                 re.get_or_insert(our_ephemeral);
 273
 274                                                 let (res, temp_k) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &re.unwrap(), &ie.unwrap());
 275                                                 *temp_k2 = Some(temp_k);
 276                                                 *state = NoiseStep::PostActTwo;
 277                                                 Ok(res)
 278                                         },
 279                                         _ => panic!("Wrong direction for act"),
 280                                 },
 281                         _ => panic!("Cannot get act one after noise handshake completes"),
 282                 }
 283         }
 284
 285         pub fn process_act_two(&mut self, act_two: &[u8], our_node_secret: &SecretKey) -> Result<([u8; 66], PublicKey), LightningError> {
 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(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(&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,
 326                         sn: 0,
 327                         sck: ck.clone(),
 328                         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, LightningError> {
 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(LightningError{err: format!("Unknown handshake version number {}", act_three[0]), action: 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(&their_node_id) {
 355                                                         Ok(key) => key,
 356                                                         Err(_) => return Err(LightningError{err: format!("Bad node_id from peer, {}", &their_node_id.to_hex()), action: 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.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,
 379                         sn: 0,
 380                         sck: ck.clone(),
 381                         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() > LN_MAX_MSG_LEN {
 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], &(msg.len() as u16).to_be_bytes());
 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, LightningError> {
 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(u16::from_be_bytes(res))
 438                         },
 439                         _ => panic!("Tried to decrypt 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>, LightningError> {
 446                 if msg.len() > LN_MAX_MSG_LEN + 16 {
 447                         panic!("Attempted to decrypt message longer than 65535 + 16 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 decrypt 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 super::LN_MAX_MSG_LEN;
 487
 488         use bitcoin::secp256k1::key::{PublicKey,SecretKey};
 489
 490         use hex;
 491
 492         use ln::peer_channel_encryptor::{PeerChannelEncryptor,NoiseState};
 493
 494         fn get_outbound_peer_for_initiator_test_vectors() -> PeerChannelEncryptor {
 495                 let their_node_id = PublicKey::from_slice(&hex::decode("028d7500dd4c12685d1f568b4c2b5048e8534b873319f3a8daa612b469132ec7f7").unwrap()[..]).unwrap();
 496
 497                 let mut outbound_peer = PeerChannelEncryptor::new_outbound(their_node_id, SecretKey::from_slice(&hex::decode("1212121212121212121212121212121212121212121212121212121212121212").unwrap()[..]).unwrap());
 498                 assert_eq!(outbound_peer.get_act_one()[..], hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap()[..]);
 499                 outbound_peer
 500         }
 501
 502         fn get_inbound_peer_for_test_vectors() -> PeerChannelEncryptor {
 503                 // transport-responder successful handshake
 504                 let our_node_id = SecretKey::from_slice(&hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 505                 let our_ephemeral = SecretKey::from_slice(&hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 506
 507                 let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 508
 509                 let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 510                 assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 511
 512                 let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 513                 // test vector doesn't specify the initiator static key, but it's the same as the one
 514                 // from transport-initiator successful handshake
 515                 assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex::decode("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]);
 516
 517                 match inbound_peer.noise_state {
 518                         NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 519                                 assert_eq!(sk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 520                                 assert_eq!(sn, 0);
 521                                 assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 522                                 assert_eq!(rk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 523                                 assert_eq!(rn, 0);
 524                                 assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 525                         },
 526                         _ => panic!()
 527                 }
 528
 529                 inbound_peer
 530         }
 531
 532         #[test]
 533         fn noise_initiator_test_vectors() {
 534                 let our_node_id = SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 535
 536                 {
 537                         // transport-initiator successful handshake
 538                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 539
 540                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 541                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 542
 543                         match outbound_peer.noise_state {
 544                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 545                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 546                                         assert_eq!(sn, 0);
 547                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 548                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 549                                         assert_eq!(rn, 0);
 550                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 551                                 },
 552                                 _ => panic!()
 553                         }
 554                 }
 555                 {
 556                         // transport-initiator act2 short read test
 557                         // Can't actually test this cause process_act_two requires you pass the right length!
 558                 }
 559                 {
 560                         // transport-initiator act2 bad version test
 561                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 562
 563                         let act_two = hex::decode("0102466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 564                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 565                 }
 566
 567                 {
 568                         // transport-initiator act2 bad key serialization test
 569                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 570
 571                         let act_two = hex::decode("0004466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 572                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 573                 }
 574
 575                 {
 576                         // transport-initiator act2 bad MAC test
 577                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 578
 579                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730af").unwrap().to_vec();
 580                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 581                 }
 582         }
 583
 584         #[test]
 585         fn noise_responder_test_vectors() {
 586                 let our_node_id = SecretKey::from_slice(&hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 587                 let our_ephemeral = SecretKey::from_slice(&hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 588
 589                 {
 590                         let _ = get_inbound_peer_for_test_vectors();
 591                 }
 592                 {
 593                         // transport-responder act1 short read test
 594                         // Can't actually test this cause process_act_one requires you pass the right length!
 595                 }
 596                 {
 597                         // transport-responder act1 bad version test
 598                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 599
 600                         let act_one = hex::decode("01036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 601                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 602                 }
 603                 {
 604                         // transport-responder act1 bad key serialization test
 605                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 606
 607                         let act_one =hex::decode("00046360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 608                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 609                 }
 610                 {
 611                         // transport-responder act1 bad MAC test
 612                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 613
 614                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6b").unwrap().to_vec();
 615                         assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 616                 }
 617                 {
 618                         // transport-responder act3 bad version test
 619                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 620
 621                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 622                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 623
 624                         let act_three = hex::decode("01b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 625                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 626                 }
 627                 {
 628                         // transport-responder act3 short read test
 629                         // Can't actually test this cause process_act_three requires you pass the right length!
 630                 }
 631                 {
 632                         // transport-responder act3 bad MAC for ciphertext test
 633                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 634
 635                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 636                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 637
 638                         let act_three = hex::decode("00c9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 639                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 640                 }
 641                 {
 642                         // transport-responder act3 bad rs test
 643                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 644
 645                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 646                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 647
 648                         let act_three = hex::decode("00bfe3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa2235536ad09a8ee351870c2bb7f78b754a26c6cef79a98d25139c856d7efd252c2ae73c").unwrap().to_vec();
 649                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 650                 }
 651                 {
 652                         // transport-responder act3 bad MAC test
 653                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 654
 655                         let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 656                         assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 657
 658                         let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139bb").unwrap().to_vec();
 659                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 660                 }
 661         }
 662
 663
 664         #[test]
 665         fn message_encryption_decryption_test_vectors() {
 666                 // We use the same keys as the initiator and responder test vectors, so we copy those tests
 667                 // here and use them to encrypt.
 668                 let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 669
 670                 {
 671                         let our_node_id = SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 672
 673                         let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 674                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 675
 676                         match outbound_peer.noise_state {
 677                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 678                                         assert_eq!(sk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 679                                         assert_eq!(sn, 0);
 680                                         assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 681                                         assert_eq!(rk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 682                                         assert_eq!(rn, 0);
 683                                         assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 684                                 },
 685                                 _ => panic!()
 686                         }
 687                 }
 688
 689                 let mut inbound_peer = get_inbound_peer_for_test_vectors();
 690
 691                 for i in 0..1005 {
 692                         let msg = [0x68, 0x65, 0x6c, 0x6c, 0x6f];
 693                         let res = outbound_peer.encrypt_message(&msg);
 694                         assert_eq!(res.len(), 5 + 2*16 + 2);
 695
 696                         let len_header = res[0..2+16].to_vec();
 697                         assert_eq!(inbound_peer.decrypt_length_header(&len_header[..]).unwrap() as usize, msg.len());
 698                         assert_eq!(inbound_peer.decrypt_message(&res[2+16..]).unwrap()[..], msg[..]);
 699
 700                         if i == 0 {
 701                                 assert_eq!(res, hex::decode("cf2b30ddf0cf3f80e7c35a6e6730b59fe802473180f396d88a8fb0db8cbcf25d2f214cf9ea1d95").unwrap());
 702                         } else if i == 1 {
 703                                 assert_eq!(res, hex::decode("72887022101f0b6753e0c7de21657d35a4cb2a1f5cde2650528bbc8f837d0f0d7ad833b1a256a1").unwrap());
 704                         } else if i == 500 {
 705                                 assert_eq!(res, hex::decode("178cb9d7387190fa34db9c2d50027d21793c9bc2d40b1e14dcf30ebeeeb220f48364f7a4c68bf8").unwrap());
 706                         } else if i == 501 {
 707                                 assert_eq!(res, hex::decode("1b186c57d44eb6de4c057c49940d79bb838a145cb528d6e8fd26dbe50a60ca2c104b56b60e45bd").unwrap());
 708                         } else if i == 1000 {
 709                                 assert_eq!(res, hex::decode("4a2f3cc3b5e78ddb83dcb426d9863d9d9a723b0337c89dd0b005d89f8d3c05c52b76b29b740f09").unwrap());
 710                         } else if i == 1001 {
 711                                 assert_eq!(res, hex::decode("2ecd8c8a5629d0d02ab457a0fdd0f7b90a192cd46be5ecb6ca570bfc5e268338b1a16cf4ef2d36").unwrap());
 712                         }
 713                 }
 714         }
 715
 716         #[test]
 717         fn max_msg_len_limit_value() {
 718                 assert_eq!(LN_MAX_MSG_LEN, 65535);
 719                 assert_eq!(LN_MAX_MSG_LEN, ::core::u16::MAX as usize);
 720         }
 721
 722         #[test]
 723         #[should_panic(expected = "Attempted to encrypt message longer than 65535 bytes!")]
 724         fn max_message_len_encryption() {
 725                 let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 726                 let msg = [4u8; LN_MAX_MSG_LEN + 1];
 727                 outbound_peer.encrypt_message(&msg);
 728         }
 729
 730         #[test]
 731         #[should_panic(expected = "Attempted to decrypt message longer than 65535 + 16 bytes!")]
 732         fn max_message_len_decryption() {
 733                 let mut inbound_peer = get_inbound_peer_for_test_vectors();
 734
 735                 // MSG should not exceed LN_MAX_MSG_LEN + 16
 736                 let msg = [4u8; LN_MAX_MSG_LEN + 17];
 737                 inbound_peer.decrypt_message(&msg).unwrap();
 738         }
 739 }