Add BOLT 12 features to PaymentParams
[rust-lightning] / lightning / src / ln / peer_channel_encryptor.rs
index 76385fc8b063221259fbe3b99d791e49e28cfa15..4632007a0adcc04ce2273d7aacf216786fea0336 100644 (file)
@@ -7,26 +7,31 @@
 // You may not use this file except in accordance with one or both of these
 // licenses.
 
-use prelude::*;
+use crate::prelude::*;
 
-use ln::msgs::LightningError;
-use ln::msgs;
+use crate::chain::keysinterface::{NodeSigner, Recipient};
+use crate::ln::msgs::LightningError;
+use crate::ln::msgs;
+use crate::ln::wire;
 
-use bitcoin::hashes::{Hash, HashEngine, Hmac, HmacEngine};
+use bitcoin::hashes::{Hash, HashEngine};
 use bitcoin::hashes::sha256::Hash as Sha256;
 
 use bitcoin::secp256k1::Secp256k1;
-use bitcoin::secp256k1::key::{PublicKey,SecretKey};
+use bitcoin::secp256k1::{PublicKey,SecretKey};
 use bitcoin::secp256k1::ecdh::SharedSecret;
 use bitcoin::secp256k1;
 
-use util::chacha20poly1305rfc::ChaCha20Poly1305RFC;
-use util::byte_utils;
+use crate::util::chacha20poly1305rfc::ChaCha20Poly1305RFC;
+use crate::util::crypto::hkdf_extract_expand_twice;
+use crate::util::ser::VecWriter;
 use bitcoin::hashes::hex::ToHex;
 
+use core::ops::Deref;
+
 /// Maximum Lightning message data length according to
-/// [BOLT-8](https://github.com/lightningnetwork/lightning-rfc/blob/v1.0/08-transport.md#lightning-message-specification)
-/// and [BOLT-1](https://github.com/lightningnetwork/lightning-rfc/blob/master/01-messaging.md#lightning-message-format):
+/// [BOLT-8](https://github.com/lightning/bolts/blob/v1.0/08-transport.md#lightning-message-specification)
+/// and [BOLT-1](https://github.com/lightning/bolts/blob/master/01-messaging.md#lightning-message-format):
 pub const LN_MAX_MSG_LEN: usize = ::core::u16::MAX as usize; // Must be equal to 65535
 
 // Sha256("Noise_XK_secp256k1_ChaChaPoly_SHA256")
@@ -34,6 +39,11 @@ const NOISE_CK: [u8; 32] = [0x26, 0x40, 0xf5, 0x2e, 0xeb, 0xcd, 0x9e, 0x88, 0x29
 // Sha256(NOISE_CK || "lightning")
 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];
 
+enum NoiseSecretKey<'a, 'b, NS: Deref> where NS::Target: NodeSigner {
+       InMemory(&'a SecretKey),
+       NodeSigner(&'b NS)
+}
+
 pub enum NextNoiseStep {
        ActOne,
        ActTwo,
@@ -80,7 +90,6 @@ enum NoiseState {
 }
 
 pub struct PeerChannelEncryptor {
-       secp_ctx: Secp256k1<secp256k1::SignOnly>,
        their_node_id: Option<PublicKey>, // filled in for outbound, or inbound after noise_state is Finished
 
        noise_state: NoiseState,
@@ -88,8 +97,6 @@ pub struct PeerChannelEncryptor {
 
 impl PeerChannelEncryptor {
        pub fn new_outbound(their_node_id: PublicKey, ephemeral_key: SecretKey) -> PeerChannelEncryptor {
-               let secp_ctx = Secp256k1::signing_only();
-
                let mut sha = Sha256::engine();
                sha.input(&NOISE_H);
                sha.input(&their_node_id.serialize()[..]);
@@ -97,7 +104,6 @@ impl PeerChannelEncryptor {
 
                PeerChannelEncryptor {
                        their_node_id: Some(their_node_id),
-                       secp_ctx,
                        noise_state: NoiseState::InProgress {
                                state: NoiseStep::PreActOne,
                                directional_state: DirectionalNoiseState::Outbound {
@@ -111,18 +117,15 @@ impl PeerChannelEncryptor {
                }
        }
 
-       pub fn new_inbound(our_node_secret: &SecretKey) -> PeerChannelEncryptor {
-               let secp_ctx = Secp256k1::signing_only();
-
+       pub fn new_inbound<NS: Deref>(node_signer: &NS) -> PeerChannelEncryptor where NS::Target: NodeSigner {
                let mut sha = Sha256::engine();
                sha.input(&NOISE_H);
-               let our_node_id = PublicKey::from_secret_key(&secp_ctx, our_node_secret);
+               let our_node_id = node_signer.get_node_id(Recipient::Node).unwrap();
                sha.input(&our_node_id.serialize()[..]);
                let h = Sha256::from_engine(sha).into_inner();
 
                PeerChannelEncryptor {
                        their_node_id: None,
-                       secp_ctx,
                        noise_state: NoiseState::InProgress {
                                state: NoiseStep::PreActOne,
                                directional_state: DirectionalNoiseState::Inbound {
@@ -141,7 +144,7 @@ impl PeerChannelEncryptor {
        #[inline]
        fn encrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], plaintext: &[u8]) {
                let mut nonce = [0; 12];
-               nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
+               nonce[4..].copy_from_slice(&n.to_le_bytes()[..]);
 
                let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
                let mut tag = [0; 16];
@@ -149,10 +152,23 @@ impl PeerChannelEncryptor {
                res[plaintext.len()..].copy_from_slice(&tag);
        }
 
+       #[inline]
+       /// Encrypts the message in res[offset..] in-place and pushes a 16-byte tag onto the end of
+       /// res.
+       fn encrypt_in_place_with_ad(res: &mut Vec<u8>, offset: usize, n: u64, key: &[u8; 32], h: &[u8]) {
+               let mut nonce = [0; 12];
+               nonce[4..].copy_from_slice(&n.to_le_bytes()[..]);
+
+               let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
+               let mut tag = [0; 16];
+               chacha.encrypt_full_message_in_place(&mut res[offset..], &mut tag);
+               res.extend_from_slice(&tag);
+       }
+
        #[inline]
        fn decrypt_with_ad(res: &mut[u8], n: u64, key: &[u8; 32], h: &[u8], cyphertext: &[u8]) -> Result<(), LightningError> {
                let mut nonce = [0; 12];
-               nonce[4..].copy_from_slice(&byte_utils::le64_to_array(n));
+               nonce[4..].copy_from_slice(&n.to_le_bytes()[..]);
 
                let mut chacha = ChaCha20Poly1305RFC::new(key, &nonce, h);
                if !chacha.decrypt(&cyphertext[0..cyphertext.len() - 16], res, &cyphertext[cyphertext.len() - 16..]) {
@@ -161,22 +177,9 @@ impl PeerChannelEncryptor {
                Ok(())
        }
 
-       fn hkdf_extract_expand(salt: &[u8], ikm: &[u8]) -> ([u8; 32], [u8; 32]) {
-               let mut hmac = HmacEngine::<Sha256>::new(salt);
-               hmac.input(ikm);
-               let prk = Hmac::from_engine(hmac).into_inner();
-               let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
-               hmac.input(&[1; 1]);
-               let t1 = Hmac::from_engine(hmac).into_inner();
-               let mut hmac = HmacEngine::<Sha256>::new(&prk[..]);
-               hmac.input(&t1);
-               hmac.input(&[2; 1]);
-               (t1, Hmac::from_engine(hmac).into_inner())
-       }
-
        #[inline]
        fn hkdf(state: &mut BidirectionalNoiseState, ss: SharedSecret) -> [u8; 32] {
-               let (t1, t2) = Self::hkdf_extract_expand(&state.ck, &ss[..]);
+               let (t1, t2) = hkdf_extract_expand_twice(&state.ck, ss.as_ref());
                state.ck = t1;
                t2
        }
@@ -206,7 +209,9 @@ impl PeerChannelEncryptor {
        }
 
        #[inline]
-       fn inbound_noise_act(state: &mut BidirectionalNoiseState, act: &[u8], our_key: &SecretKey) -> Result<(PublicKey, [u8; 32]), LightningError> {
+       fn inbound_noise_act<'a, 'b, NS: Deref>(
+               state: &mut BidirectionalNoiseState, act: &[u8], secret_key: NoiseSecretKey<'a, 'b, NS>
+       ) -> Result<(PublicKey, [u8; 32]), LightningError> where NS::Target: NodeSigner {
                assert_eq!(act.len(), 50);
 
                if act[0] != 0 {
@@ -223,7 +228,15 @@ impl PeerChannelEncryptor {
                sha.input(&their_pub.serialize()[..]);
                state.h = Sha256::from_engine(sha).into_inner();
 
-               let ss = SharedSecret::new(&their_pub, &our_key);
+               let ss = match secret_key {
+                       NoiseSecretKey::InMemory(secret_key) => SharedSecret::new(&their_pub, secret_key),
+                       NoiseSecretKey::NodeSigner(node_signer) => node_signer
+                               .ecdh(Recipient::Node, &their_pub, None)
+                               .map_err(|_| LightningError {
+                                       err: "Failed to derive shared secret".to_owned(),
+                                       action: msgs::ErrorAction::DisconnectPeer { msg: None }
+                               })?,
+               };
                let temp_k = PeerChannelEncryptor::hkdf(state, ss);
 
                let mut dec = [0; 0];
@@ -237,7 +250,7 @@ impl PeerChannelEncryptor {
                Ok((their_pub, temp_k))
        }
 
-       pub fn get_act_one(&mut self) -> [u8; 50] {
+       pub fn get_act_one<C: secp256k1::Signing>(&mut self, secp_ctx: &Secp256k1<C>) -> [u8; 50] {
                match self.noise_state {
                        NoiseState::InProgress { ref mut state, ref directional_state, ref mut bidirectional_state } =>
                                match directional_state {
@@ -246,7 +259,7 @@ impl PeerChannelEncryptor {
                                                        panic!("Requested act at wrong step");
                                                }
 
-                                               let (res, _) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &ie, &self.their_node_id.unwrap());
+                                               let (res, _) = PeerChannelEncryptor::outbound_noise_act(secp_ctx, bidirectional_state, &ie, &self.their_node_id.unwrap());
                                                *state = NoiseStep::PostActOne;
                                                res
                                        },
@@ -256,7 +269,9 @@ impl PeerChannelEncryptor {
                }
        }
 
-       pub fn process_act_one_with_keys(&mut self, act_one: &[u8], our_node_secret: &SecretKey, our_ephemeral: SecretKey) -> Result<[u8; 50], LightningError> {
+       pub fn process_act_one_with_keys<C: secp256k1::Signing, NS: Deref>(
+               &mut self, act_one: &[u8], node_signer: &NS, our_ephemeral: SecretKey, secp_ctx: &Secp256k1<C>)
+       -> Result<[u8; 50], LightningError> where NS::Target: NodeSigner {
                assert_eq!(act_one.len(), 50);
 
                match self.noise_state {
@@ -267,12 +282,13 @@ impl PeerChannelEncryptor {
                                                        panic!("Requested act at wrong step");
                                                }
 
-                                               let (their_pub, _) = PeerChannelEncryptor::inbound_noise_act(bidirectional_state, act_one, &our_node_secret)?;
+                                               let (their_pub, _) = PeerChannelEncryptor::inbound_noise_act(bidirectional_state, act_one, NoiseSecretKey::NodeSigner(node_signer))?;
                                                ie.get_or_insert(their_pub);
 
                                                re.get_or_insert(our_ephemeral);
 
-                                               let (res, temp_k) = PeerChannelEncryptor::outbound_noise_act(&self.secp_ctx, bidirectional_state, &re.unwrap(), &ie.unwrap());
+                                               let (res, temp_k) =
+                                                       PeerChannelEncryptor::outbound_noise_act(secp_ctx, bidirectional_state, &re.unwrap(), &ie.unwrap());
                                                *temp_k2 = Some(temp_k);
                                                *state = NoiseStep::PostActTwo;
                                                Ok(res)
@@ -283,7 +299,9 @@ impl PeerChannelEncryptor {
                }
        }
 
-       pub fn process_act_two(&mut self, act_two: &[u8], our_node_secret: &SecretKey) -> Result<([u8; 66], PublicKey), LightningError> {
+       pub fn process_act_two<NS: Deref>(
+               &mut self, act_two: &[u8], node_signer: &NS)
+       -> Result<([u8; 66], PublicKey), LightningError> where NS::Target: NodeSigner {
                assert_eq!(act_two.len(), 50);
 
                let final_hkdf;
@@ -296,10 +314,13 @@ impl PeerChannelEncryptor {
                                                        panic!("Requested act at wrong step");
                                                }
 
-                                               let (re, temp_k2) = PeerChannelEncryptor::inbound_noise_act(bidirectional_state, act_two, &ie)?;
+                                               let (re, temp_k2) = PeerChannelEncryptor::inbound_noise_act(bidirectional_state, act_two, NoiseSecretKey::<NS>::InMemory(&ie))?;
 
                                                let mut res = [0; 66];
-                                               let our_node_id = PublicKey::from_secret_key(&self.secp_ctx, &our_node_secret);
+                                               let our_node_id = node_signer.get_node_id(Recipient::Node).map_err(|_| LightningError {
+                                                       err: "Failed to encrypt message".to_owned(),
+                                                       action: msgs::ErrorAction::DisconnectPeer { msg: None }
+                                               })?;
 
                                                PeerChannelEncryptor::encrypt_with_ad(&mut res[1..50], 1, &temp_k2, &bidirectional_state.h, &our_node_id.serialize()[..]);
 
@@ -308,11 +329,14 @@ impl PeerChannelEncryptor {
                                                sha.input(&res[1..50]);
                                                bidirectional_state.h = Sha256::from_engine(sha).into_inner();
 
-                                               let ss = SharedSecret::new(&re, our_node_secret);
+                                               let ss = node_signer.ecdh(Recipient::Node, &re, None).map_err(|_| LightningError {
+                                                       err: "Failed to derive shared secret".to_owned(),
+                                                       action: msgs::ErrorAction::DisconnectPeer { msg: None }
+                                               })?;
                                                let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 
                                                PeerChannelEncryptor::encrypt_with_ad(&mut res[50..], 0, &temp_k, &bidirectional_state.h, &[0; 0]);
-                                               final_hkdf = Self::hkdf_extract_expand(&bidirectional_state.ck, &[0; 0]);
+                                               final_hkdf = hkdf_extract_expand_twice(&bidirectional_state.ck, &[0; 0]);
                                                ck = bidirectional_state.ck.clone();
                                                res
                                        },
@@ -366,7 +390,7 @@ impl PeerChannelEncryptor {
                                                let temp_k = PeerChannelEncryptor::hkdf(bidirectional_state, ss);
 
                                                PeerChannelEncryptor::decrypt_with_ad(&mut [0; 0], 0, &temp_k, &bidirectional_state.h, &act_three[50..])?;
-                                               final_hkdf = Self::hkdf_extract_expand(&bidirectional_state.ck, &[0; 0]);
+                                               final_hkdf = hkdf_extract_expand_twice(&bidirectional_state.ck, &[0; 0]);
                                                ck = bidirectional_state.ck.clone();
                                        },
                                        _ => panic!("Wrong direction for act"),
@@ -387,9 +411,9 @@ impl PeerChannelEncryptor {
                Ok(self.their_node_id.unwrap().clone())
        }
 
-       /// Encrypts the given message, returning the encrypted version
+       /// Encrypts the given pre-serialized message, returning the encrypted version.
        /// panics if msg.len() > 65535 or Noise handshake has not finished.
-       pub fn encrypt_message(&mut self, msg: &[u8]) -> Vec<u8> {
+       pub fn encrypt_buffer(&mut self, msg: &[u8]) -> Vec<u8> {
                if msg.len() > LN_MAX_MSG_LEN {
                        panic!("Attempted to encrypt message longer than 65535 bytes!");
                }
@@ -400,13 +424,13 @@ impl PeerChannelEncryptor {
                match self.noise_state {
                        NoiseState::Finished { ref mut sk, ref mut sn, ref mut sck, rk: _, rn: _, rck: _ } => {
                                if *sn >= 1000 {
-                                       let (new_sck, new_sk) = Self::hkdf_extract_expand(sck, sk);
+                                       let (new_sck, new_sk) = hkdf_extract_expand_twice(sck, sk);
                                        *sck = new_sck;
                                        *sk = new_sk;
                                        *sn = 0;
                                }
 
-                               Self::encrypt_with_ad(&mut res[0..16+2], *sn, sk, &[0; 0], &byte_utils::be16_to_array(msg.len() as u16));
+                               Self::encrypt_with_ad(&mut res[0..16+2], *sn, sk, &[0; 0], &(msg.len() as u16).to_be_bytes());
                                *sn += 1;
 
                                Self::encrypt_with_ad(&mut res[16+2..], *sn, sk, &[0; 0], msg);
@@ -418,6 +442,42 @@ impl PeerChannelEncryptor {
                res
        }
 
+       /// Encrypts the given message, returning the encrypted version.
+       /// panics if the length of `message`, once encoded, is greater than 65535 or if the Noise
+       /// handshake has not finished.
+       pub fn encrypt_message<M: wire::Type>(&mut self, message: &M) -> Vec<u8> {
+               // Allocate a buffer with 2KB, fitting most common messages. Reserve the first 16+2 bytes
+               // for the 2-byte message type prefix and its MAC.
+               let mut res = VecWriter(Vec::with_capacity(2048));
+               res.0.resize(16 + 2, 0);
+               wire::write(message, &mut res).expect("In-memory messages must never fail to serialize");
+
+               let msg_len = res.0.len() - 16 - 2;
+               if msg_len > LN_MAX_MSG_LEN {
+                       panic!("Attempted to encrypt message longer than 65535 bytes!");
+               }
+
+               match self.noise_state {
+                       NoiseState::Finished { ref mut sk, ref mut sn, ref mut sck, rk: _, rn: _, rck: _ } => {
+                               if *sn >= 1000 {
+                                       let (new_sck, new_sk) = hkdf_extract_expand_twice(sck, sk);
+                                       *sck = new_sck;
+                                       *sk = new_sk;
+                                       *sn = 0;
+                               }
+
+                               Self::encrypt_with_ad(&mut res.0[0..16+2], *sn, sk, &[0; 0], &(msg_len as u16).to_be_bytes());
+                               *sn += 1;
+
+                               Self::encrypt_in_place_with_ad(&mut res.0, 16+2, *sn, sk, &[0; 0]);
+                               *sn += 1;
+                       },
+                       _ => panic!("Tried to encrypt a message prior to noise handshake completion"),
+               }
+
+               res.0
+       }
+
        /// Decrypts a message length header from the remote peer.
        /// panics if noise handshake has not yet finished or msg.len() != 18
        pub fn decrypt_length_header(&mut self, msg: &[u8]) -> Result<u16, LightningError> {
@@ -426,7 +486,7 @@ impl PeerChannelEncryptor {
                match self.noise_state {
                        NoiseState::Finished { sk: _, sn: _, sck: _, ref mut rk, ref mut rn, ref mut rck } => {
                                if *rn >= 1000 {
-                                       let (new_rck, new_rk) = Self::hkdf_extract_expand(rck, rk);
+                                       let (new_rck, new_rk) = hkdf_extract_expand_twice(rck, rk);
                                        *rck = new_rck;
                                        *rk = new_rk;
                                        *rn = 0;
@@ -435,7 +495,7 @@ impl PeerChannelEncryptor {
                                let mut res = [0; 2];
                                Self::decrypt_with_ad(&mut res, *rn, rk, &[0; 0], msg)?;
                                *rn += 1;
-                               Ok(byte_utils::slice_to_be16(&res))
+                               Ok(u16::from_be_bytes(res))
                        },
                        _ => panic!("Tried to decrypt a message prior to noise handshake completion"),
                }
@@ -486,17 +546,20 @@ impl PeerChannelEncryptor {
 mod tests {
        use super::LN_MAX_MSG_LEN;
 
-       use bitcoin::secp256k1::key::{PublicKey,SecretKey};
+       use bitcoin::secp256k1::{PublicKey, SecretKey};
+       use bitcoin::secp256k1::Secp256k1;
 
        use hex;
 
-       use ln::peer_channel_encryptor::{PeerChannelEncryptor,NoiseState};
+       use crate::ln::peer_channel_encryptor::{PeerChannelEncryptor,NoiseState};
+       use crate::util::test_utils::TestNodeSigner;
 
        fn get_outbound_peer_for_initiator_test_vectors() -> PeerChannelEncryptor {
                let their_node_id = PublicKey::from_slice(&hex::decode("028d7500dd4c12685d1f568b4c2b5048e8534b873319f3a8daa612b469132ec7f7").unwrap()[..]).unwrap();
+               let secp_ctx = Secp256k1::signing_only();
 
                let mut outbound_peer = PeerChannelEncryptor::new_outbound(their_node_id, SecretKey::from_slice(&hex::decode("1212121212121212121212121212121212121212121212121212121212121212").unwrap()[..]).unwrap());
-               assert_eq!(outbound_peer.get_act_one()[..], hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap()[..]);
+               assert_eq!(outbound_peer.get_act_one(&secp_ctx)[..], hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap()[..]);
                outbound_peer
        }
 
@@ -504,11 +567,13 @@ mod tests {
                // transport-responder successful handshake
                let our_node_id = SecretKey::from_slice(&hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
                let our_ephemeral = SecretKey::from_slice(&hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
+               let secp_ctx = Secp256k1::new();
+               let node_signer = TestNodeSigner::new(our_node_id);
 
-               let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
+               let mut inbound_peer = PeerChannelEncryptor::new_inbound(&&node_signer);
 
                let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
-               assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
+               assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &&node_signer, our_ephemeral.clone(), &secp_ctx).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 
                let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
                // test vector doesn't specify the initiator static key, but it's the same as the one
@@ -533,13 +598,14 @@ mod tests {
        #[test]
        fn noise_initiator_test_vectors() {
                let our_node_id = SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
+               let node_signer = TestNodeSigner::new(our_node_id);
 
                {
                        // transport-initiator successful handshake
                        let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 
                        let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
-                       assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
+                       assert_eq!(outbound_peer.process_act_two(&act_two[..], &&node_signer).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 
                        match outbound_peer.noise_state {
                                NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
@@ -562,7 +628,7 @@ mod tests {
                        let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 
                        let act_two = hex::decode("0102466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
-                       assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
+                       assert!(outbound_peer.process_act_two(&act_two[..], &&node_signer).is_err());
                }
 
                {
@@ -570,7 +636,7 @@ mod tests {
                        let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 
                        let act_two = hex::decode("0004466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
-                       assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
+                       assert!(outbound_peer.process_act_two(&act_two[..], &&node_signer).is_err());
                }
 
                {
@@ -578,7 +644,7 @@ mod tests {
                        let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
 
                        let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730af").unwrap().to_vec();
-                       assert!(outbound_peer.process_act_two(&act_two[..], &our_node_id).is_err());
+                       assert!(outbound_peer.process_act_two(&act_two[..], &&node_signer).is_err());
                }
        }
 
@@ -586,6 +652,8 @@ mod tests {
        fn noise_responder_test_vectors() {
                let our_node_id = SecretKey::from_slice(&hex::decode("2121212121212121212121212121212121212121212121212121212121212121").unwrap()[..]).unwrap();
                let our_ephemeral = SecretKey::from_slice(&hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap();
+               let secp_ctx = Secp256k1::new();
+               let node_signer = TestNodeSigner::new(our_node_id);
 
                {
                        let _ = get_inbound_peer_for_test_vectors();
@@ -596,31 +664,31 @@ mod tests {
                }
                {
                        // transport-responder act1 bad version test
-                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
+                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&&node_signer);
 
                        let act_one = hex::decode("01036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
-                       assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
+                       assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &&node_signer, our_ephemeral.clone(), &secp_ctx).is_err());
                }
                {
                        // transport-responder act1 bad key serialization test
-                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
+                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&&node_signer);
 
                        let act_one =hex::decode("00046360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
-                       assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
+                       assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &&node_signer, our_ephemeral.clone(), &secp_ctx).is_err());
                }
                {
                        // transport-responder act1 bad MAC test
-                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
+                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&&node_signer);
 
                        let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6b").unwrap().to_vec();
-                       assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err());
+                       assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &&node_signer, our_ephemeral.clone(), &secp_ctx).is_err());
                }
                {
                        // transport-responder act3 bad version test
-                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
+                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&&node_signer);
 
                        let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
-                       assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
+                       assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &&node_signer, our_ephemeral.clone(), &secp_ctx).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 
                        let act_three = hex::decode("01b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
                        assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
@@ -631,30 +699,30 @@ mod tests {
                }
                {
                        // transport-responder act3 bad MAC for ciphertext test
-                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
+                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&&node_signer);
 
                        let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
-                       assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
+                       assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &&node_signer, our_ephemeral.clone(), &secp_ctx).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 
                        let act_three = hex::decode("00c9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec();
                        assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
                }
                {
                        // transport-responder act3 bad rs test
-                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
+                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&&node_signer);
 
                        let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
-                       assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
+                       assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &&node_signer, our_ephemeral.clone(), &secp_ctx).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 
                        let act_three = hex::decode("00bfe3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa2235536ad09a8ee351870c2bb7f78b754a26c6cef79a98d25139c856d7efd252c2ae73c").unwrap().to_vec();
                        assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
                }
                {
                        // transport-responder act3 bad MAC test
-                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id);
+                       let mut inbound_peer = PeerChannelEncryptor::new_inbound(&&node_signer);
 
                        let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec();
-                       assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
+                       assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &&node_signer, our_ephemeral.clone(), &secp_ctx).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]);
 
                        let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139bb").unwrap().to_vec();
                        assert!(inbound_peer.process_act_three(&act_three[..]).is_err());
@@ -670,9 +738,10 @@ mod tests {
 
                {
                        let our_node_id = SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap();
+                       let node_signer = TestNodeSigner::new(our_node_id);
 
                        let act_two = hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap().to_vec();
-                       assert_eq!(outbound_peer.process_act_two(&act_two[..], &our_node_id).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
+                       assert_eq!(outbound_peer.process_act_two(&act_two[..], &&node_signer).unwrap().0[..], hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap()[..]);
 
                        match outbound_peer.noise_state {
                                NoiseState::Finished { sk, sn, sck, rk, rn, rck } => {
@@ -691,7 +760,7 @@ mod tests {
 
                for i in 0..1005 {
                        let msg = [0x68, 0x65, 0x6c, 0x6c, 0x6f];
-                       let res = outbound_peer.encrypt_message(&msg);
+                       let res = outbound_peer.encrypt_buffer(&msg);
                        assert_eq!(res.len(), 5 + 2*16 + 2);
 
                        let len_header = res[0..2+16].to_vec();
@@ -725,7 +794,7 @@ mod tests {
        fn max_message_len_encryption() {
                let mut outbound_peer = get_outbound_peer_for_initiator_test_vectors();
                let msg = [4u8; LN_MAX_MSG_LEN + 1];
-               outbound_peer.encrypt_message(&msg);
+               outbound_peer.encrypt_buffer(&msg);
        }
 
        #[test]