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

   1 use ln::msgs::HandleError;
   2 use ln::msgs;
   3
   4 use secp256k1::Secp256k1;
   5 use secp256k1::key::{PublicKey,SecretKey};
   6 use secp256k1::ecdh::SharedSecret;
   7
   8 use rand::{thread_rng,Rng};
   9
  10 use crypto::digest::Digest;
  11 use crypto::hkdf::{hkdf_extract,hkdf_expand};
  12 use crypto::sha2::Sha256;
  13
  14 use crypto::aead::{AeadEncryptor, AeadDecryptor};
  15
  16 use util::chacha20poly1305rfc::ChaCha20Poly1305RFC;
  17 use util::byte_utils;
  18
  19 // Sha256("Noise_XK_secp256k1_ChaChaPoly_SHA256")
  20 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];
  21 // Sha256(NOISE_CK || "lightning")
  22 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];
  23
  24 pub enum NextNoiseStep {
  25         ActOne,
  26         ActTwo,
  27         ActThree,
  28         NoiseComplete,
  29 }
  30
  31 #[derive(PartialEq)]
  32 enum NoiseStep {
  33         PreActOne,
  34         PostActOne,
  35         PostActTwo,
  36         // When done swap noise_state for NoiseState::Finished
  37 }
  38
  39 struct BidirectionalNoiseState {
  40         h: [u8; 32],
  41         ck: [u8; 32],
  42 }
  43 enum DirectionalNoiseState {
  44         Outbound {
  45                 ie: SecretKey,
  46         },
  47         Inbound {
  48                 ie: Option<PublicKey>, // filled in if state >= PostActOne
  49                 re: Option<SecretKey>, // filled in if state >= PostActTwo
  50                 temp_k2: Option<[u8; 32]>, // filled in if state >= PostActTwo
  51         }
  52 }
  53 enum NoiseState {
  54         InProgress {
  55                 state: NoiseStep,
  56                 directional_state: DirectionalNoiseState,
  57                 bidirectional_state: BidirectionalNoiseState,
  58         },
  59         Finished {
  60                 sk: [u8; 32],
  61                 sn: u64,
  62                 sck: [u8; 32],
  63                 rk: [u8; 32],
  64                 rn: u64,
  65                 rck: [u8; 32],
  66         }
  67 }
  68
  69 pub struct PeerChannelEncryptor {
  70         secp_ctx: Secp256k1,
  71         their_node_id: Option<PublicKey>, // filled in for outbound, or inbound after noise_state is Finished
  72
  73         noise_state: NoiseState,
  74 }
  75
  76 impl PeerChannelEncryptor {
  77         pub fn new_outbound(their_node_id: PublicKey) -> PeerChannelEncryptor {
  78                 let mut rng = thread_rng();
  79                 let mut key = [0u8; 32];
  80                 rng.fill_bytes(&mut key);
  81
  82                 let secp_ctx = Secp256k1::new();
  83                 let sec_key = SecretKey::from_slice(&secp_ctx, &key).unwrap(); //TODO: nicer rng-is-bad error message
  84
  85                 let mut sha = Sha256::new();
  86                 sha.input(&NOISE_H);
  87                 sha.input(&their_node_id.serialize()[..]);
  88                 let mut h = [0; 32];
  89                 sha.result(&mut h);
  90
  91                 PeerChannelEncryptor {
  92                         their_node_id: Some(their_node_id),
  93                         secp_ctx: secp_ctx,
  94                         noise_state: NoiseState::InProgress {
  95                                 state: NoiseStep::PreActOne,
  96                                 directional_state: DirectionalNoiseState::Outbound {
  97                                         ie: sec_key,
  98                                 },
  99                                 bidirectional_state: BidirectionalNoiseState {
 100                                         h: h,
 101                                         ck: NOISE_CK,
 102                                 },
 103                         }
 104                 }
 105         }
 106
 107         pub fn new_inbound(our_node_secret: &SecretKey) -> PeerChannelEncryptor {
 108                 let secp_ctx = Secp256k1::new();
 109
 110                 let mut sha = Sha256::new();
 111                 sha.input(&NOISE_H);
 112                 let our_node_id = PublicKey::from_secret_key(&secp_ctx, our_node_secret).unwrap(); //TODO: nicer bad-node_secret error message
 113                 sha.input(&our_node_id.serialize()[..]);
 114                 let mut h = [0; 32];
 115                 sha.result(&mut h);
 116
 117                 PeerChannelEncryptor {
 118                         their_node_id: None,
 119                         secp_ctx: secp_ctx,
 120                         noise_state: NoiseState::InProgress {
 121                                 state: NoiseStep::PreActOne,
 122                                 directional_state: DirectionalNoiseState::Inbound {
 123                                         ie: None,
 124                                         re: None,
 125                                         temp_k2: None,
 126                                 },
 127                                 bidirectional_state: BidirectionalNoiseState {
 128                                         h: h,
 129                                         ck: NOISE_CK,
 130                                 },
 131                         }
 132                 }
 133         }
 134
 135         #[inline]
 136         fn encrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], plaintext: &[u8]) {
 137                 let mut nonce = [0; 12];
 138                 nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
 139
 140                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 141                 let mut tag = [0; 16];
 142                 chacha.encrypt(plaintext, &mut res[0..plaintext.len()], &mut tag);
 143                 res[plaintext.len()..].copy_from_slice(&tag);
 144         }
 145
 146         #[inline]
 147         fn decrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], cyphertext: &[u8]) -> Result<(), HandleError> {
 148                 let mut nonce = [0; 12];
 149                 nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
 150
 151                 let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
 152                 if !chacha.decrypt(&cyphertext[0..cyphertext.len() - 16], res, &cyphertext[cyphertext.len() - 16..]) {
 153                         return Err(HandleError{err: "Bad MAC", msg: Some(msgs::ErrorMessage::DisconnectPeer{})});
 154                 }
 155                 Ok(())
 156         }
 157
 158         #[inline]
 159         fn hkdf(state: &mut BidirectionalNoiseState, ss: SharedSecret) -> [u8; 32] {
 160                 let mut hkdf = [0; 64];
 161                 {
 162                         let mut prk = [0; 32];
 163                         hkdf_extract(Sha256::new(), &state.ck, &ss[..], &mut prk);
 164                         hkdf_expand(Sha256::new(), &prk, &[0;0], &mut hkdf);
 165                 }
 166                 state.ck.copy_from_slice(&hkdf[0..32]);
 167                 let mut res = [0; 32];
 168                 res.copy_from_slice(&hkdf[32..]);
 169                 res
 170         }
 171
 172         #[inline]
 173         fn outbound_noise_act(secp_ctx: &Secp256k1, state: &mut BidirectionalNoiseState, our_key: &SecretKey, their_key: &PublicKey) -> ([u8; 50], [u8; 32]) {
 174                 let our_pub = PublicKey::from_secret_key(secp_ctx, &our_key).unwrap(); //TODO: nicer rng-is-bad error message
 175
 176                 let mut sha = Sha256::new();
 177                 sha.input(&state.h);
 178                 sha.input(&our_pub.serialize()[..]);
 179                 sha.result(&mut state.h);
 180
 181                 let ss = SharedSecret::new(secp_ctx, &their_key, &our_key);
 182                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 183
 184                 let mut res = [0; 50];
 185                 res[1..34].copy_from_slice(&our_pub.serialize()[..]);
 186                 PeerChannelEncryptor::encrypt_with_ad(&mut res[34..], 0, &temp_k, &state.h, &[0; 0]);
 187
 188                 sha.reset();
 189                 sha.input(&state.h);
 190                 sha.input(&res[34..]);
 191                 sha.result(&mut state.h);
 192
 193                 (res, temp_k)
 194         }
 195
 196         #[inline]
 197         fn inbound_noise_act(secp_ctx: &Secp256k1, state: &mut BidirectionalNoiseState, act: &[u8], our_key: &SecretKey) -> Result<(PublicKey, [u8; 32]), HandleError> {
 198                 assert_eq!(act.len(), 50);
 199
 200                 if act[0] != 0 {
 201                         return Err(HandleError{err: "Unknown handshake version number", msg: Some(msgs::ErrorMessage::DisconnectPeer{})});
 202                 }
 203
 204                 let their_pub = match PublicKey::from_slice(secp_ctx, &act[1..34]) {
 205                         Err(_) => return Err(HandleError{err: "Invalid public key", msg: Some(msgs::ErrorMessage::DisconnectPeer{})}),
 206                         Ok(key) => key,
 207                 };
 208
 209                 let mut sha = Sha256::new();
 210                 sha.input(&state.h);
 211                 sha.input(&their_pub.serialize()[..]);
 212                 sha.result(&mut state.h);
 213
 214                 let ss = SharedSecret::new(secp_ctx, &their_pub, &our_key);
 215                 let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 216
 217                 let mut dec = [0; 0];
 218                 PeerChannelEncryptor::decrypt_with_ad(&mut dec, 0, &temp_k, &state.h, &act[34..])?;
 219
 220                 sha.reset();
 221                 sha.input(&state.h);
 222                 sha.input(&act[34..]);
 223                 sha.result(&mut state.h);
 224
 225                 Ok((their_pub, temp_k))
 226         }
 227
 228         pub fn get_act_one(&mut self) -> [u8; 50] {
 229                 match self.noise_state {
 230                         NoiseState::InProgress { ref mut state, ref directional_state, ref mut bidirectional_state } =>
 231                                 match directional_state {
 232                                         &DirectionalNoiseState::Outbound { ref ie } => {
 233                                                 if *state != NoiseStep::PreActOne {
 234                                                         panic!("Requested act at wrong step");
 235                                                 }
 236
 237                                                 let (res, _) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &ie, &self.their_node_id.unwrap());
 238                                                 *state = NoiseStep::PostActOne;
 239                                                 res
 240                                         },
 241                                         _ => panic!("Wrong direction for act"),
 242                                 },
 243                         _ => panic!("Cannot get act one after noise handshake completes"),
 244                 }
 245         }
 246
 247         // Separated for testing:
 248         fn process_act_one_with_ephemeral_key(&mut self, act_one: &[u8], our_node_secret: &SecretKey, our_ephemeral: SecretKey) -> Result<[u8; 50], HandleError> {
 249                 assert_eq!(act_one.len(), 50);
 250
 251                 match self.noise_state {
 252                         NoiseState::InProgress { ref mut state, ref mut directional_state, ref mut bidirectional_state } =>
 253                                 match directional_state {
 254                                         &mut DirectionalNoiseState::Inbound { ref mut ie, ref mut re, ref mut temp_k2 } => {
 255                                                 if *state != NoiseStep::PreActOne {
 256                                                         panic!("Requested act at wrong step");
 257                                                 }
 258
 259                                                 let (their_pub, _) = PeerChannelEncryptor::inbound_noise_act(&self.secp_ctx, bidirectional_state, act_one, &our_node_secret)?;
 260                                                 ie.get_or_insert(their_pub);
 261
 262                                                 re.get_or_insert(our_ephemeral);
 263
 264                                                 let (res, temp_k) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &re.unwrap(), &ie.unwrap());
 265                                                 *temp_k2 = Some(temp_k);
 266                                                 *state = NoiseStep::PostActTwo;
 267                                                 Ok(res)
 268                                         },
 269                                         _ => panic!("Wrong direction for act"),
 270                                 },
 271                         _ => panic!("Cannot get act one after noise handshake completes"),
 272                 }
 273         }
 274
 275         pub fn process_act_one_with_key(&mut self, act_one: &[u8], our_node_secret: &SecretKey) -> Result<[u8; 50], HandleError> {
 276                 assert_eq!(act_one.len(), 50);
 277
 278                 let mut rng = thread_rng();
 279                 let mut key = [0u8; 32];
 280                 rng.fill_bytes(&mut key);
 281                 let our_ephemeral_key = SecretKey::from_slice(&self.secp_ctx, &key).unwrap(); //TODO: nicer rng-is-bad error message
 282                 self.process_act_one_with_ephemeral_key(act_one, our_node_secret, our_ephemeral_key)
 283         }
 284
 285         pub fn process_act_two(&mut self, act_two: &[u8], our_node_secret: &SecretKey) -> Result<[u8; 66], HandleError> {
 286                 assert_eq!(act_two.len(), 50);
 287
 288                 let mut final_hkdf = [0; 64];
 289                 let ck;
 290                 let res: [u8; 66] = match self.noise_state {
 291                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 292                                 match directional_state {
 293                                         &DirectionalNoiseState::Outbound { ref ie } => {
 294                                                 if *state != NoiseStep::PostActOne {
 295                                                         panic!("Requested act at wrong step");
 296                                                 }
 297
 298                                                 let (re, temp_k2) = PeerChannelEncryptor::inbound_noise_act(&self.secp_ctx, bidirectional_state, act_two, &ie)?;
 299
 300                                                 let mut res = [0; 66];
 301                                                 let our_node_id = PublicKey::from_secret_key(&self.secp_ctx, &our_node_secret).unwrap(); //TODO: nicer rng-is-bad error message
 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::new();
 306                                                 sha.input(&bidirectional_state.h);
 307                                                 sha.input(&res[1..50]);
 308                                                 sha.result(&mut bidirectional_state.h);
 309
 310                                                 let ss = SharedSecret::new(&self.secp_ctx, &re, our_node_secret);
 311                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 312
 313                                                 PeerChannelEncryptor::encrypt_with_ad(&mut res[50..], 0, &temp_k, &bidirectional_state.h, &[0; 0]);
 314
 315                                                 let mut prk = [0; 32];
 316                                                 hkdf_extract(Sha256::new(), &bidirectional_state.ck, &[0; 0], &mut prk);
 317                                                 hkdf_expand(Sha256::new(), &prk, &[0;0], &mut final_hkdf);
 318                                                 ck = bidirectional_state.ck.clone();
 319                                                 res
 320                                         },
 321                                         _ => panic!("Wrong direction for act"),
 322                                 },
 323                         _ => panic!("Cannot get act one after noise handshake completes"),
 324                 };
 325
 326                 let mut sk = [0; 32];
 327                 let mut rk = [0; 32];
 328                 sk.copy_from_slice(&final_hkdf[0..32]);
 329                 rk.copy_from_slice(&final_hkdf[32..]);
 330
 331                 self.noise_state = NoiseState::Finished {
 332                         sk: sk,
 333                         sn: 0,
 334                         sck: ck.clone(),
 335                         rk: rk,
 336                         rn: 0,
 337                         rck: ck,
 338                 };
 339
 340                 Ok(res)
 341         }
 342
 343         pub fn process_act_three(&mut self, act_three: &[u8]) -> Result<PublicKey, HandleError> {
 344                 assert_eq!(act_three.len(), 66);
 345
 346                 let mut final_hkdf = [0; 64];
 347                 let ck;
 348                 match self.noise_state {
 349                         NoiseState::InProgress { ref state, ref directional_state, ref mut bidirectional_state } =>
 350                                 match directional_state {
 351                                         &DirectionalNoiseState::Inbound { ie: _, ref re, ref temp_k2 } => {
 352                                                 if *state != NoiseStep::PostActTwo {
 353                                                         panic!("Requested act at wrong step");
 354                                                 }
 355                                                 if act_three[0] != 0 {
 356                                                         return Err(HandleError{err: "Unknown handshake version number", msg: Some(msgs::ErrorMessage::DisconnectPeer{})});
 357                                                 }
 358
 359                                                 let mut their_node_id = [0; 33];
 360                                                 PeerChannelEncryptor::decrypt_with_ad(&mut their_node_id, 1, &temp_k2.unwrap(), &bidirectional_state.h, &act_three[1..50])?;
 361                                                 self.their_node_id = Some(match PublicKey::from_slice(&self.secp_ctx, &their_node_id) {
 362                                                         Ok(key) => key,
 363                                                         Err(_) => return Err(HandleError{err: "Bad node_id from peer", msg: Some(msgs::ErrorMessage::DisconnectPeer{})}),
 364                                                 });
 365
 366                                                 let mut sha = Sha256::new();
 367                                                 sha.input(&bidirectional_state.h);
 368                                                 sha.input(&act_three[1..50]);
 369                                                 sha.result(&mut bidirectional_state.h);
 370
 371                                                 let ss = SharedSecret::new(&self.secp_ctx, &self.their_node_id.unwrap(), &re.unwrap());
 372                                                 let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 373
 374                                                 PeerChannelEncryptor::decrypt_with_ad(&mut [0; 0], 0, &temp_k, &bidirectional_state.h, &act_three[50..])?;
 375
 376                                                 let mut prk = [0; 32];
 377                                                 hkdf_extract(Sha256::new(), &bidirectional_state.ck, &[0; 0], &mut prk);
 378                                                 hkdf_expand(Sha256::new(), &prk, &[0;0], &mut final_hkdf);
 379                                                 ck = bidirectional_state.ck.clone();
 380                                         },
 381                                         _ => panic!("Wrong direction for act"),
 382                                 },
 383                         _ => panic!("Cannot get act one after noise handshake completes"),
 384                 }
 385
 386                 let mut rk = [0; 32];
 387                 let mut sk = [0; 32];
 388                 rk.copy_from_slice(&final_hkdf[0..32]);
 389                 sk.copy_from_slice(&final_hkdf[32..]);
 390
 391                 self.noise_state = NoiseState::Finished {
 392                         sk: sk,
 393                         sn: 0,
 394                         sck: ck.clone(),
 395                         rk: rk,
 396                         rn: 0,
 397                         rck: ck,
 398                 };
 399
 400                 Ok(self.their_node_id.unwrap().clone())
 401         }
 402
 403         /// Encrypts the given message, returning the encrypted version
 404         /// panics if msg.len() > 65535 or Noise handshake has not finished.
 405         pub fn encrypt_message(&mut self, msg: &[u8]) -> Vec<u8> {
 406                 if msg.len() > 65535 {
 407                         panic!("Attempted to encrypt message longer than 65535 bytes!");
 408                 }
 409
 410                 let mut res = Vec::with_capacity(msg.len() + 16*2 + 2);
 411                 res.resize(msg.len() + 16*2 + 2, 0);
 412
 413                 match self.noise_state {
 414                         NoiseState::Finished { ref mut sk, ref mut sn, ref mut sck, rk: _, rn: _, rck: _ } => {
 415                                 if *sn >= 1000 {
 416                                         let mut prk = [0; 32];
 417                                         hkdf_extract(Sha256::new(), sck, sk, &mut prk);
 418                                         let mut hkdf = [0; 64];
 419                                         hkdf_expand(Sha256::new(), &prk, &[0;0], &mut hkdf);
 420
 421                                         sck[..].copy_from_slice(&hkdf[0..32]);
 422                                         sk[..].copy_from_slice(&hkdf[32..]);
 423                                         *sn = 0;
 424                                 }
 425
 426                                 Self::encrypt_with_ad(&mut res[0..16+2], *sn, sk, &[0; 0], &byte_utils::be16_to_array(msg.len() as u16));
 427                                 *sn += 1;
 428
 429                                 Self::encrypt_with_ad(&mut res[16+2..], *sn, sk, &[0; 0], msg);
 430                                 *sn += 1;
 431                         },
 432                         _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
 433                 }
 434
 435                 res
 436         }
 437
 438         /// Decrypts a message length header from the remote peer.
 439         /// panics if noise handshake has not yet finished or msg.len() != 18
 440         pub fn decrypt_length_header(&mut self, msg: &[u8]) -> Result<u16, HandleError> {
 441                 assert_eq!(msg.len(), 16+2);
 442
 443                 match self.noise_state {
 444                         NoiseState::Finished { sk: _, sn: _, sck: _, ref mut rk, ref mut rn, ref mut rck } => {
 445                                 if *rn >= 1000 {
 446                                         let mut prk = [0; 32];
 447                                         hkdf_extract(Sha256::new(), rck, rk, &mut prk);
 448                                         let mut hkdf = [0; 64];
 449                                         hkdf_expand(Sha256::new(), &prk, &[0;0], &mut hkdf);
 450
 451                                         rck[..].copy_from_slice(&hkdf[0..32]);
 452                                         rk[..].copy_from_slice(&hkdf[32..]);
 453                                         *rn = 0;
 454                                 }
 455
 456                                 let mut res = [0; 2];
 457                                 Self::decrypt_with_ad(&mut res, *rn, rk, &[0; 0], msg)?;
 458                                 *rn += 1;
 459                                 Ok(byte_utils::slice_to_be16(&res))
 460                         },
 461                         _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
 462                 }
 463         }
 464
 465         /// Decrypts the given message.
 466         /// panics if msg.len() > 65535 + 16
 467         pub fn decrypt_message(&mut self, msg: &[u8]) -> Result<Vec<u8>, HandleError> {
 468                 if msg.len() > 65535 + 16 {
 469                         panic!("Attempted to encrypt message longer than 65535 bytes!");
 470                 }
 471
 472                 match self.noise_state {
 473                         NoiseState::Finished { sk: _, sn: _, sck: _, ref rk, ref mut rn, rck: _ } => {
 474                                 let mut res = Vec::with_capacity(msg.len() - 16);
 475                                 res.resize(msg.len() - 16, 0);
 476                                 Self::decrypt_with_ad(&mut res[..], *rn, rk, &[0; 0], msg)?;
 477                                 *rn += 1;
 478
 479                                 Ok(res)
 480                         },
 481                         _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
 482                 }
 483         }
 484
 485         pub fn get_noise_step(&self) -> NextNoiseStep {
 486                 match self.noise_state {
 487                         NoiseState::InProgress {ref state, ..} => {
 488                                 match state {
 489                                         &NoiseStep::PreActOne => NextNoiseStep::ActOne,
 490                                         &NoiseStep::PostActOne => NextNoiseStep::ActTwo,
 491                                         &NoiseStep::PostActTwo => NextNoiseStep::ActThree,
 492                                 }
 493                         },
 494                         NoiseState::Finished {..} => NextNoiseStep::NoiseComplete,
 495                 }
 496         }
 497
 498         pub fn is_ready_for_encryption(&self) -> bool {
 499                 match self.noise_state {
 500                         NoiseState::InProgress {..} => { false },
 501                         NoiseState::Finished {..} => { true }
 502                 }
 503         }
 504 }
 505
 506 #[cfg(test)]
 507 mod tests {
 508         use secp256k1::Secp256k1;
 509         use secp256k1::key::{PublicKey,SecretKey};
 510
 511         use bitcoin::util::misc::hex_bytes;
 512
 513         use ln::peer_channel_encryptor::{PeerChannelEncryptor,NoiseState,DirectionalNoiseState};
 514
 515         fn get_outbound_peer_for_initiator_test_vectors() -> PeerChannelEncryptor {
 516                 let secp_ctx = Secp256k1::new();
 517                 let their_node_id = PublicKey::from_slice(&secp_ctx, &hex_bytes("028d7500dd4c12685d1f568b4c2b5048e8534b873319f3a8daa612b469132ec7f7").unwrap()[..]).unwrap();
 518
 519                 let mut outbound_peer = PeerChannelEncryptor::new_outbound(their_node_id);
 520                 match outbound_peer.noise_state {
 521                         NoiseState::InProgress { state: _, ref mut directional_state, bidirectional_state: _ } => {
 522                                 *directional_state = DirectionalNoiseState::Outbound { // overwrite ie...
 523                                         ie: SecretKey::from_slice(&secp_ctx, &hex_bytes("1212121212121212121212121212121212121212121212121212121212121212").unwrap()[..]).unwrap(),
 524                                 };
 525                         },
 526                         _ => panic!()
 527                 }
 528
 529                 assert_eq!(outbound_peer.get_act_one()[..], hex_bytes("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap()[..]);
 530                 outbound_peer
 531         }
 532
 533         #[test]
 534         fn noise_initiator_test_vectors() {
 535                 let secp_ctx = Secp256k1::new();
 536                 let our_node_id = SecretKey::from_slice(&secp_ctx, &hex_bytes("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 537
 538                 {
 539                         // transport-initiator successful handshake
 540                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 541
 542                         let act_two = hex_bytes("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 543                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap()[..], hex_bytes("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 544
 545                         match outbound_peer.noise_state {
 546                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 547                                         assert_eq!(sk, hex_bytes("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 548                                         assert_eq!(sn, 0);
 549                                         assert_eq!(sck, hex_bytes("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 550                                         assert_eq!(rk, hex_bytes("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 551                                         assert_eq!(rn, 0);
 552                                         assert_eq!(rck, hex_bytes("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 553                                 },
 554                                 _ => panic!()
 555                         }
 556                 }
 557                 {
 558                         // transport-initiator act2 short read test
 559                         // Can't actually test this cause process_act_two requires you pass the right length!
 560                 }
 561                 {
 562                         // transport-initiator act2 bad version test
 563                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 564
 565                         let act_two = hex_bytes("0102466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 566                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 567                 }
 568
 569                 {
 570                         // transport-initiator act2 bad key serialization test
 571                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 572
 573                         let act_two = hex_bytes("0004466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 574                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 575                 }
 576
 577                 {
 578                         // transport-initiator act2 bad MAC test
 579                         let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 580
 581                         let act_two = hex_bytes("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730af").unwrap().to_vec();
 582                         assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
 583                 }
 584         }
 585
 586         #[test]
 587         fn noise_responder_test_vectors() {
 588                 let secp_ctx = Secp256k1::new();
 589                 let our_node_id = SecretKey::from_slice(&secp_ctx, &hex_bytes("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 590                 let our_ephemeral = SecretKey::from_slice(&secp_ctx, &hex_bytes("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 591
 592                 {
 593                         // transport-responder successful handshake
 594                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 595
 596                         let act_one = hex_bytes("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 597                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex_bytes("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 598
 599                         let act_three = hex_bytes("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 600                         // test vector doesn't specify the initiator static key, but its the same as the one
 601                         // from trasport-initiator successful handshake
 602                         assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex_bytes("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]);
 603
 604                         match inbound_peer.noise_state {
 605                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 606                                         assert_eq!(sk, hex_bytes("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 607                                         assert_eq!(sn, 0);
 608                                         assert_eq!(sck, hex_bytes("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 609                                         assert_eq!(rk, hex_bytes("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 610                                         assert_eq!(rn, 0);
 611                                         assert_eq!(rck, hex_bytes("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 612                                 },
 613                                 _ => panic!()
 614                         }
 615                 }
 616                 {
 617                         // transport-responder act1 short read test
 618                         // Can't actually test this cause process_act_one requires you pass the right length!
 619                 }
 620                 {
 621                         // transport-responder act1 bad version test
 622                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 623
 624                         let act_one = hex_bytes("01036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 625                         assert!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 626                 }
 627                 {
 628                         // transport-responder act1 bad key serialization test
 629                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 630
 631                         let act_one =hex_bytes("00046360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 632                         assert!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 633                 }
 634                 {
 635                         // transport-responder act1 bad MAC test
 636                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 637
 638                         let act_one = hex_bytes("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6b").unwrap().to_vec();
 639                         assert!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
 640                 }
 641                 {
 642                         // transport-responder act3 bad version test
 643                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 644
 645                         let act_one = hex_bytes("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 646                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex_bytes("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 647
 648                         let act_three = hex_bytes("01b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 649                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 650                 }
 651                 {
 652                         // transport-responder act3 short read test
 653                         // Can't actually test this cause process_act_three requires you pass the right length!
 654                 }
 655                 {
 656                         // transport-responder act3 bad MAC for ciphertext test
 657                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 658
 659                         let act_one = hex_bytes("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 660                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex_bytes("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 661
 662                         let act_three = hex_bytes("00c9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 663                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 664                 }
 665                 {
 666                         // transport-responder act3 bad rs test
 667                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 668
 669                         let act_one = hex_bytes("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 670                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex_bytes("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 671
 672                         let act_three = hex_bytes("00bfe3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa2235536ad09a8ee351870c2bb7f78b754a26c6cef79a98d25139c856d7efd252c2ae73c").unwrap().to_vec();
 673                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 674                 }
 675                 {
 676                         // transport-responder act3 bad MAC test
 677                         let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 678
 679                         let act_one = hex_bytes("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 680                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex_bytes("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 681
 682                         let act_three = hex_bytes("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139bb").unwrap().to_vec();
 683                         assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
 684                 }
 685         }
 686
 687
 688         #[test]
 689         fn message_encryption_decryption_test_vectors() {
 690                 let secp_ctx = Secp256k1::new();
 691
 692                 // We use the same keys as the initiator and responder test vectors, so we copy those tests
 693                 // here and use them to encrypt.
 694                 let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 695
 696                 {
 697                         let our_node_id = SecretKey::from_slice(&secp_ctx, &hex_bytes("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
 698
 699                         let act_two = hex_bytes("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
 700                         assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap()[..], hex_bytes("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 701
 702                         match outbound_peer.noise_state {
 703                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 704                                         assert_eq!(sk, hex_bytes("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 705                                         assert_eq!(sn, 0);
 706                                         assert_eq!(sck, hex_bytes("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 707                                         assert_eq!(rk, hex_bytes("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 708                                         assert_eq!(rn, 0);
 709                                         assert_eq!(rck, hex_bytes("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 710                                 },
 711                                 _ => panic!()
 712                         }
 713                 }
 714
 715                 let mut inbound_peer;
 716
 717                 {
 718                         // transport-responder successful handshake
 719                         let our_node_id = SecretKey::from_slice(&secp_ctx, &hex_bytes("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
 720                         let our_ephemeral = SecretKey::from_slice(&secp_ctx, &hex_bytes("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
 721
 722                         inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
 723
 724                         let act_one = hex_bytes("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
 725                         assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex_bytes("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 726
 727                         let act_three = hex_bytes("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
 728                         // test vector doesn't specify the initiator static key, but its the same as the one
 729                         // from trasport-initiator successful handshake
 730                         assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex_bytes("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]);
 731
 732                         match inbound_peer.noise_state {
 733                                 NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
 734                                         assert_eq!(sk, hex_bytes("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]);
 735                                         assert_eq!(sn, 0);
 736                                         assert_eq!(sck, hex_bytes("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 737                                         assert_eq!(rk, hex_bytes("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]);
 738                                         assert_eq!(rn, 0);
 739                                         assert_eq!(rck, hex_bytes("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]);
 740                                 },
 741                                 _ => panic!()
 742                         }
 743                 }
 744
 745                 for i in 0..1005 {
 746                         let msg = [0x68, 0x65, 0x6c, 0x6c, 0x6f];
 747                         let res = outbound_peer.encrypt_message(&msg);
 748                         assert_eq!(res.len(), 5 + 2*16 + 2);
 749
 750                         let mut len_header = res[0..2+16].to_vec();
 751                         assert_eq!(inbound_peer.decrypt_length_header(&len_header[..]).unwrap() as usize, msg.len());
 752                         assert_eq!(inbound_peer.decrypt_message(&res[2+16..]).unwrap()[..], msg[..]);
 753
 754                         if i == 0 {
 755                                 assert_eq!(res, hex_bytes("cf2b30ddf0cf3f80e7c35a6e6730b59fe802473180f396d88a8fb0db8cbcf25d2f214cf9ea1d95").unwrap());
 756                         } else if i == 1 {
 757                                 assert_eq!(res, hex_bytes("72887022101f0b6753e0c7de21657d35a4cb2a1f5cde2650528bbc8f837d0f0d7ad833b1a256a1").unwrap());
 758                         } else if i == 500 {
 759                                 assert_eq!(res, hex_bytes("178cb9d7387190fa34db9c2d50027d21793c9bc2d40b1e14dcf30ebeeeb220f48364f7a4c68bf8").unwrap());
 760                         } else if i == 501 {
 761                                 assert_eq!(res, hex_bytes("1b186c57d44eb6de4c057c49940d79bb838a145cb528d6e8fd26dbe50a60ca2c104b56b60e45bd").unwrap());
 762                         } else if i == 1000 {
 763                                 assert_eq!(res, hex_bytes("4a2f3cc3b5e78ddb83dcb426d9863d9d9a723b0337c89dd0b005d89f8d3c05c52b76b29b740f09").unwrap());
 764                         } else if i == 1001 {
 765                                 assert_eq!(res, hex_bytes("2ecd8c8a5629d0d02ab457a0fdd0f7b90a192cd46be5ecb6ca570bfc5e268338b1a16cf4ef2d36").unwrap());
 766                         }
 767                 }
 768         }
 769 }