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