From 084ef28708765c0b1ecc041e64a125a7090eeed1 Mon Sep 17 00:00:00 2001 From: Matt Corallo Date: Thu, 18 Jul 2019 22:17:36 -0400 Subject: [PATCH] Stop using rng in peer_channel_encryptor to generate ephemeral keys This removes the bulk of our reliance on the rand crate in non-test envs, paving a way towards a syscall-less rust-lightning and WASM. Since this is a breaking change for full_stack_target (and several fuzz targets), go ahead and make other changes to make things more distinct. --- fuzz/fuzz_targets/chanmon_fail_consistency.rs | 17 ++-- fuzz/fuzz_targets/full_stack_target.rs | 99 ++++++++----------- fuzz/fuzz_targets/peer_crypt_target.rs | 8 +- src/ln/functional_tests.rs | 10 +- src/ln/peer_channel_encryptor.rs | 53 +++------- src/ln/peer_handler.rs | 48 ++++++++- 6 files changed, 121 insertions(+), 114 deletions(-) diff --git a/fuzz/fuzz_targets/chanmon_fail_consistency.rs b/fuzz/fuzz_targets/chanmon_fail_consistency.rs index c26ff88a7..bebedda5e 100644 --- a/fuzz/fuzz_targets/chanmon_fail_consistency.rs +++ b/fuzz/fuzz_targets/chanmon_fail_consistency.rs @@ -37,7 +37,7 @@ use lightning::ln::channelmonitor::{ChannelMonitorUpdateErr, HTLCUpdate}; use lightning::ln::channelmanager::{ChannelManager, PaymentHash, PaymentPreimage}; use lightning::ln::router::{Route, RouteHop}; use lightning::ln::msgs::{CommitmentUpdate, ChannelMessageHandler, ErrorAction, HandleError, UpdateAddHTLC, LocalFeatures}; -use lightning::util::{reset_rng_state, fill_bytes, events}; +use lightning::util::{reset_rng_state, events}; use lightning::util::logger::Logger; use lightning::util::config::UserConfig; use lightning::util::events::{EventsProvider, MessageSendEventsProvider}; @@ -52,6 +52,7 @@ use secp256k1::Secp256k1; use std::cmp::Ordering; use std::collections::HashSet; use std::sync::{Arc,Mutex}; +use std::sync::atomic; use std::io::Cursor; struct FuzzEstimator {} @@ -91,6 +92,8 @@ impl channelmonitor::ManyChannelMonitor for TestChannelMonitor { struct KeyProvider { node_id: u8, + session_id: atomic::AtomicU8, + channel_id: atomic::AtomicU8, } impl KeysInterface for KeyProvider { fn get_node_secret(&self) -> SecretKey { @@ -121,15 +124,13 @@ impl KeysInterface for KeyProvider { } fn get_session_key(&self) -> SecretKey { - let mut session_key = [0; 32]; - fill_bytes(&mut session_key); - SecretKey::from_slice(&session_key).unwrap() + let id = self.session_id.fetch_add(1, atomic::Ordering::Relaxed); + SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, id, 10, self.node_id]).unwrap() } fn get_channel_id(&self) -> [u8; 32] { - let mut channel_id = [0; 32]; - fill_bytes(&mut channel_id); - channel_id + let id = self.channel_id.fetch_add(1, atomic::Ordering::Relaxed); + [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, id, 11, self.node_id] } } @@ -146,7 +147,7 @@ pub fn do_test(data: &[u8]) { let watch = Arc::new(ChainWatchInterfaceUtil::new(Network::Bitcoin, Arc::clone(&logger))); let monitor = Arc::new(TestChannelMonitor::new(watch.clone(), broadcast.clone(), logger.clone(), fee_est.clone())); - let keys_manager = Arc::new(KeyProvider { node_id: $node_id }); + let keys_manager = Arc::new(KeyProvider { node_id: $node_id, session_id: atomic::AtomicU8::new(0), channel_id: atomic::AtomicU8::new(0) }); let mut config = UserConfig::new(); config.channel_options.fee_proportional_millionths = 0; config.channel_options.announced_channel = true; diff --git a/fuzz/fuzz_targets/full_stack_target.rs b/fuzz/fuzz_targets/full_stack_target.rs index d575aa247..8e0977978 100644 --- a/fuzz/fuzz_targets/full_stack_target.rs +++ b/fuzz/fuzz_targets/full_stack_target.rs @@ -34,7 +34,7 @@ use lightning::ln::channelmanager::{ChannelManager, PaymentHash, PaymentPreimage use lightning::ln::peer_handler::{MessageHandler,PeerManager,SocketDescriptor}; use lightning::ln::router::Router; use lightning::util::events::{EventsProvider,Event}; -use lightning::util::{reset_rng_state, fill_bytes}; +use lightning::util::reset_rng_state; use lightning::util::logger::Logger; use lightning::util::config::UserConfig; @@ -50,7 +50,7 @@ use std::collections::{HashMap, hash_map}; use std::cmp; use std::hash::Hash; use std::sync::Arc; -use std::sync::atomic::{AtomicUsize,Ordering}; +use std::sync::atomic::{AtomicU8,AtomicUsize,Ordering}; #[inline] pub fn slice_to_be16(v: &[u8]) -> u16 { @@ -237,6 +237,7 @@ impl<'a> Drop for MoneyLossDetector<'a> { struct KeyProvider { node_secret: SecretKey, + counter: AtomicU8, } impl KeysInterface for KeyProvider { fn get_node_secret(&self) -> SecretKey { @@ -256,54 +257,36 @@ impl KeysInterface for KeyProvider { } fn get_channel_keys(&self, inbound: bool) -> ChannelKeys { + let ctr = self.counter.fetch_add(1, Ordering::Relaxed); if inbound { ChannelKeys { - funding_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0]).unwrap(), - revocation_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0]).unwrap(), - payment_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, 0]).unwrap(), - delayed_payment_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0]).unwrap(), - htlc_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0]).unwrap(), - commitment_seed: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], + funding_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, ctr]).unwrap(), + revocation_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, ctr]).unwrap(), + payment_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 3, ctr]).unwrap(), + delayed_payment_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, ctr]).unwrap(), + htlc_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 5, ctr]).unwrap(), + commitment_seed: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 6, ctr], } } else { ChannelKeys { - funding_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]).unwrap(), - revocation_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]).unwrap(), - payment_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]).unwrap(), - delayed_payment_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]).unwrap(), - htlc_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0]).unwrap(), - commitment_seed: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], + funding_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 7, ctr]).unwrap(), + revocation_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 8, ctr]).unwrap(), + payment_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 9, ctr]).unwrap(), + delayed_payment_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, ctr]).unwrap(), + htlc_base_key: SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 11, ctr]).unwrap(), + commitment_seed: [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 12, ctr], } } } fn get_session_key(&self) -> SecretKey { - let mut session_key = [0; 32]; - fill_bytes(&mut session_key); - SecretKey::from_slice(&session_key).unwrap() + let ctr = self.counter.fetch_add(1, Ordering::Relaxed); + SecretKey::from_slice(&[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 13, ctr]).unwrap() } fn get_channel_id(&self) -> [u8; 32] { - let mut channel_id = [0; 32]; - fill_bytes(&mut channel_id); - for i in 0..4 { - // byteswap the u64s in channel_id to make it distinct from get_session_key (and match - // old code that wrote out different endianness). - let mut t; - t = channel_id[i*8 + 0]; - channel_id[i*8 + 0] = channel_id[i*8 + 7]; - channel_id[i*8 + 7] = t; - t = channel_id[i*8 + 1]; - channel_id[i*8 + 1] = channel_id[i*8 + 6]; - channel_id[i*8 + 6] = t; - t = channel_id[i*8 + 2]; - channel_id[i*8 + 2] = channel_id[i*8 + 5]; - channel_id[i*8 + 5] = t; - t = channel_id[i*8 + 3]; - channel_id[i*8 + 3] = channel_id[i*8 + 4]; - channel_id[i*8 + 4] = t; - } - channel_id + let ctr = self.counter.fetch_add(1, Ordering::Relaxed); + [0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 14, ctr] } } @@ -346,7 +329,7 @@ pub fn do_test(data: &[u8], logger: &Arc) { let broadcast = Arc::new(TestBroadcaster{}); let monitor = channelmonitor::SimpleManyChannelMonitor::new(watch.clone(), broadcast.clone(), Arc::clone(&logger), fee_est.clone()); - let keys_manager = Arc::new(KeyProvider { node_secret: our_network_key.clone() }); + let keys_manager = Arc::new(KeyProvider { node_secret: our_network_key.clone(), counter: AtomicU8::new(0) }); let mut config = UserConfig::new(); config.channel_options.fee_proportional_millionths = slice_to_be32(get_slice!(4)); config.channel_options.announced_channel = get_slice!(1)[0] != 0; @@ -358,7 +341,7 @@ pub fn do_test(data: &[u8], logger: &Arc) { let mut loss_detector = MoneyLossDetector::new(&peers, channelmanager.clone(), monitor.clone(), PeerManager::new(MessageHandler { chan_handler: channelmanager.clone(), route_handler: router.clone(), - }, our_network_key, Arc::clone(&logger))); + }, our_network_key, &[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 15, 0], Arc::clone(&logger))); let mut should_forward = false; let mut payments_received: Vec = Vec::new(); @@ -690,7 +673,7 @@ mod tests { // 030112 - inbound read from peer id 1 of len 18 // 0110 01000000000000000000000000000000 - message header indicating message length 272 // 0301ff - inbound read from peer id 1 of len 255 - // 0021 0200000000000000020000000000000002000000000000000200000000000000 000000000000001a 00000000004c4b40 00000000000003e8 00000000000003e8 00000002 03f0 0005 030000000000000000000000000000000000000000000000000000000000000100 030000000000000000000000000000000000000000000000000000000000000200 030000000000000000000000000000000000000000000000000000000000000300 030000000000000000000000000000000000000000000000000000000000000400 030000000000000000000000000000000000000000000000000000000000000500 03000000000000000000000000000000 - beginning of accept_channel + // 0021 0000000000000000000000000000000000000000000000000000000000000e02 000000000000001a 00000000004c4b40 00000000000003e8 00000000000003e8 00000002 03f0 0005 030000000000000000000000000000000000000000000000000000000000000100 030000000000000000000000000000000000000000000000000000000000000200 030000000000000000000000000000000000000000000000000000000000000300 030000000000000000000000000000000000000000000000000000000000000400 030000000000000000000000000000000000000000000000000000000000000500 03000000000000000000000000000000 - beginning of accept_channel // 030121 - inbound read from peer id 1 of len 33 // 0000000000000000000000000000000000 01000000000000000000000000000000 - rest of accept_channel and mac // @@ -699,7 +682,7 @@ mod tests { // 030112 - inbound read from peer id 1 of len 18 // 0062 01000000000000000000000000000000 - message header indicating message length 98 // 030172 - inbound read from peer id 1 of len 114 - // 0023 3f00000000000000000000000000000000000000000000000000000000000000f6000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 01000000000000000000000000000000 - funding_signed message and mac + // 0023 3900000000000000000000000000000000000000000000000000000000000000 f0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 01000000000000000000000000000000 - funding_signed message and mac // // 0b - broadcast funding transaction // - by now client should have sent a funding_locked (CHECK 4: SendFundingLocked to 03020000 for chan 3f000000) @@ -707,7 +690,7 @@ mod tests { // 030112 - inbound read from peer id 1 of len 18 // 0043 01000000000000000000000000000000 - message header indicating message length 67 // 030153 - inbound read from peer id 1 of len 83 - // 0024 3f00000000000000000000000000000000000000000000000000000000000000 030100000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - funding_locked and mac + // 0024 3900000000000000000000000000000000000000000000000000000000000000 030100000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - funding_locked and mac // // 030012 - inbound read from peer id 0 of len 18 // 05ac 03000000000000000000000000000000 - message header indicating message length 1452 @@ -744,28 +727,28 @@ mod tests { // 030112 - inbound read from peer id 1 of len 18 // 0064 01000000000000000000000000000000 - message header indicating message length 100 // 030174 - inbound read from peer id 1 of len 116 - // 0084 3f00000000000000000000000000000000000000000000000000000000000000 f7000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 0000 01000000000000000000000000000000 - commitment_signed and mac + // 0084 3900000000000000000000000000000000000000000000000000000000000000 f1000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 0000 01000000000000000000000000000000 - commitment_signed and mac // // 030112 - inbound read from peer id 1 of len 18 // 0063 01000000000000000000000000000000 - message header indicating message length 99 // 030173 - inbound read from peer id 1 of len 115 - // 0085 3f00000000000000000000000000000000000000000000000000000000000000 0000000000000000000000000000000000000000000000000000000000000000 030200000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - revoke_and_ack and mac + // 0085 3900000000000000000000000000000000000000000000000000000000000000 0000000000000000000000000000000000000000000000000000000000000000 030200000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - revoke_and_ack and mac // // 030112 - inbound read from peer id 1 of len 18 // 004a 01000000000000000000000000000000 - message header indicating message length 74 // 03015a - inbound read from peer id 1 of len 90 - // 0082 3f00000000000000000000000000000000000000000000000000000000000000 0000000000000000 ff00888888888888888888888888888888888888888888888888888888888888 01000000000000000000000000000000 - update_fulfill_htlc and mac + // 0082 3900000000000000000000000000000000000000000000000000000000000000 0000000000000000 ff00888888888888888888888888888888888888888888888888888888888888 01000000000000000000000000000000 - update_fulfill_htlc and mac // - client should immediately claim the pending HTLC from peer 0 (CHECK 8: SendFulfillHTLCs for node 03000000 with preimage ff00888888 for channel 3d000000) // // 030112 - inbound read from peer id 1 of len 18 // 0064 01000000000000000000000000000000 - message header indicating message length 100 // 030174 - inbound read from peer id 1 of len 116 - // 0084 3f00000000000000000000000000000000000000000000000000000000000000 fb000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 0000 01000000000000000000000000000000 - commitment_signed and mac + // 0084 3900000000000000000000000000000000000000000000000000000000000000 fd000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 0000 01000000000000000000000000000000 - commitment_signed and mac // // 030112 - inbound read from peer id 1 of len 18 // 0063 01000000000000000000000000000000 - message header indicating message length 99 // 030173 - inbound read from peer id 1 of len 115 - // 0085 3f00000000000000000000000000000000000000000000000000000000000000 0100000000000000000000000000000000000000000000000000000000000000 030300000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - revoke_and_ack and mac + // 0085 3900000000000000000000000000000000000000000000000000000000000000 0100000000000000000000000000000000000000000000000000000000000000 030300000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - revoke_and_ack and mac // // - before responding to the commitment_signed generated above, send a new HTLC // 030012 - inbound read from peer id 0 of len 18 @@ -809,27 +792,27 @@ mod tests { // 030112 - inbound read from peer id 1 of len 18 // 0064 01000000000000000000000000000000 - message header indicating message length 100 // 030174 - inbound read from peer id 1 of len 116 - // 0084 3f00000000000000000000000000000000000000000000000000000000000000 fa000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 0000 01000000000000000000000000000000 - commitment_signed and mac + // 0084 3900000000000000000000000000000000000000000000000000000000000000 fc000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 0000 01000000000000000000000000000000 - commitment_signed and mac // // 030112 - inbound read from peer id 1 of len 18 // 0063 01000000000000000000000000000000 - message header indicating message length 99 // 030173 - inbound read from peer id 1 of len 115 - // 0085 3f00000000000000000000000000000000000000000000000000000000000000 0200000000000000000000000000000000000000000000000000000000000000 030400000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - revoke_and_ack and mac + // 0085 3900000000000000000000000000000000000000000000000000000000000000 0200000000000000000000000000000000000000000000000000000000000000 030400000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - revoke_and_ack and mac // // 030112 - inbound read from peer id 1 of len 18 // 002c 01000000000000000000000000000000 - message header indicating message length 44 // 03013c - inbound read from peer id 1 of len 60 - // 0083 3f00000000000000000000000000000000000000000000000000000000000000 0000000000000001 0000 01000000000000000000000000000000 - update_fail_htlc and mac + // 0083 3900000000000000000000000000000000000000000000000000000000000000 0000000000000001 0000 01000000000000000000000000000000 - update_fail_htlc and mac // // 030112 - inbound read from peer id 1 of len 18 // 0064 01000000000000000000000000000000 - message header indicating message length 100 // 030174 - inbound read from peer id 1 of len 116 - // 0084 3f00000000000000000000000000000000000000000000000000000000000000 fd000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 0000 01000000000000000000000000000000 - commitment_signed and mac + // 0084 3900000000000000000000000000000000000000000000000000000000000000 fb000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000100 0000 01000000000000000000000000000000 - commitment_signed and mac // // 030112 - inbound read from peer id 1 of len 18 // 0063 01000000000000000000000000000000 - message header indicating message length 99 // 030173 - inbound read from peer id 1 of len 115 - // 0085 3f00000000000000000000000000000000000000000000000000000000000000 0300000000000000000000000000000000000000000000000000000000000000 030500000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - revoke_and_ack and mac + // 0085 3900000000000000000000000000000000000000000000000000000000000000 0300000000000000000000000000000000000000000000000000000000000000 030500000000000000000000000000000000000000000000000000000000000000 01000000000000000000000000000000 - revoke_and_ack and mac // // 07 - process the now-pending HTLC forward // - client now sends id 0 update_fail_htlc and commitment_signed (CHECK 9) @@ -878,11 +861,11 @@ mod tests { // - client now sends id 1 update_add_htlc and commitment_signed (CHECK 7 duplicate) // // 0c007d - connect a block with one transaction of len 125 - // 02000000013f0000000000000000000000000000000000000000000000000000000000000000000000000000008002000100000000000022002090000000000000000000000000000000000000000000000000000000000000006cc10000000000001600145c0000000000000000000000000000000000000005000020 - the commitment transaction for channel 3f00000000000000000000000000000000000000000000000000000000000000 + // 0200000001390000000000000000000000000000000000000000000000000000000000000000000000000000008002000100000000000022002090000000000000000000000000000000000000000000000000000000000000006cc10000000000001600145c0000000000000000000000000000000000000005000020 - the commitment transaction for channel 3f00000000000000000000000000000000000000000000000000000000000000 // 00fd - A feerate request (returning min feerate, which our open_channel also uses) (gonna be ingested by FuzzEstimator) // 00fd - A feerate request (returning min feerate, which our open_channel also uses) (gonna be ingested by FuzzEstimator) // 0c005e - connect a block with one transaction of len 94 - // 0200000001fb00000000000000000000000000000000000000000000000000000000000000000000000000000000014f00000000000000220020f60000000000000000000000000000000000000000000000000000000000000000000000 - the funding transaction + // 0200000001fd00000000000000000000000000000000000000000000000000000000000000000000000000000000014f00000000000000220020f60000000000000000000000000000000000000000000000000000000000000000000000 - the funding transaction // 0c0000 - connect a block with no transactions // 0c0000 - connect a block with no transactions // 0c0000 - connect a block with no transactions @@ -893,18 +876,18 @@ mod tests { // - client now fails the HTLC backwards as it was unable to extract the payment preimage (CHECK 9 duplicate and CHECK 10) let logger = Arc::new(TrackingLogger { lines: Mutex::new(HashMap::new()) }); - 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&(Arc::clone(&logger) as Arc)); + 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&(Arc::clone(&logger) as Arc)); let log_entries = logger.lines.lock().unwrap(); assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling SendAcceptChannel event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 for channel ff4f00f805273c1b203bb5ebf8436bfde57b3be8c2f5e95d9491dbb181909679".to_string())), Some(&1)); // 1 assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling SendFundingSigned event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&1)); // 2 assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling SendFundingLocked event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&1)); // 3 - assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling SendFundingLocked event in peer_handler for node 030200000000000000000000000000000000000000000000000000000000000000 for channel 3f00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&1)); // 4 + assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling SendFundingLocked event in peer_handler for node 030200000000000000000000000000000000000000000000000000000000000000 for channel 3900000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&1)); // 4 assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling SendRevokeAndACK event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&4)); // 5 assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 with 0 adds, 0 fulfills, 0 fails for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&3)); // 6 - assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030200000000000000000000000000000000000000000000000000000000000000 with 1 adds, 0 fulfills, 0 fails for channel 3f00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&3)); // 7 + assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030200000000000000000000000000000000000000000000000000000000000000 with 1 adds, 0 fulfills, 0 fails for channel 3900000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&3)); // 7 assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 with 0 adds, 1 fulfills, 0 fails for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&1)); // 8 assert_eq!(log_entries.get(&("lightning::ln::peer_handler".to_string(), "Handling UpdateHTLCs event in peer_handler for node 030000000000000000000000000000000000000000000000000000000000000000 with 0 adds, 0 fulfills, 1 fails for channel 3d00000000000000000000000000000000000000000000000000000000000000".to_string())), Some(&2)); // 9 - assert_eq!(log_entries.get(&("lightning::ln::channelmonitor".to_string(), "Input spending remote commitment tx (00000000000000000000000000000000000000000000000000000000000000fb:0) in 0000000000000000000000000000000000000000000000000000000000000042 resolves outbound HTLC with payment hash ff00000000000000000000000000000000000000000000000000000000000000 with timeout".to_string())), Some(&1)); // 10 + assert_eq!(log_entries.get(&("lightning::ln::channelmonitor".to_string(), "Input spending remote commitment tx (00000000000000000000000000000000000000000000000000000000000000fd:0) in 0000000000000000000000000000000000000000000000000000000000000044 resolves outbound HTLC with payment hash ff00000000000000000000000000000000000000000000000000000000000000 with timeout".to_string())), Some(&1)); // 10 } } diff --git a/fuzz/fuzz_targets/peer_crypt_target.rs b/fuzz/fuzz_targets/peer_crypt_target.rs index ed1e95881..a4ddbf5e4 100644 --- a/fuzz/fuzz_targets/peer_crypt_target.rs +++ b/fuzz/fuzz_targets/peer_crypt_target.rs @@ -34,13 +34,17 @@ pub fn do_test(data: &[u8]) { Ok(key) => key, Err(_) => return, }; + let ephemeral_key = match SecretKey::from_slice(get_slice!(32)) { + Ok(key) => key, + Err(_) => return, + }; let mut crypter = if get_slice!(1)[0] != 0 { let their_pubkey = match PublicKey::from_slice(get_slice!(33)) { Ok(key) => key, Err(_) => return, }; - let mut crypter = PeerChannelEncryptor::new_outbound(their_pubkey); + let mut crypter = PeerChannelEncryptor::new_outbound(their_pubkey, ephemeral_key); crypter.get_act_one(); match crypter.process_act_two(get_slice!(50), &our_network_key) { Ok(_) => {}, @@ -50,7 +54,7 @@ pub fn do_test(data: &[u8]) { crypter } else { let mut crypter = PeerChannelEncryptor::new_inbound(&our_network_key); - match crypter.process_act_one_with_key(get_slice!(50), &our_network_key) { + match crypter.process_act_one_with_keys(get_slice!(50), &our_network_key, ephemeral_key) { Ok(_) => {}, Err(_) => return, } diff --git a/src/ln/functional_tests.rs b/src/ln/functional_tests.rs index 956995c9b..4c6cde82c 100644 --- a/src/ln/functional_tests.rs +++ b/src/ln/functional_tests.rs @@ -18,7 +18,6 @@ use util::events::{Event, EventsProvider, MessageSendEvent, MessageSendEventsPro use util::errors::APIError; use util::ser::{Writeable, ReadableArgs}; use util::config::UserConfig; -use util::rng; use bitcoin::util::hash::BitcoinHash; use bitcoin_hashes::sha256d::Hash as Sha256dHash; @@ -44,6 +43,8 @@ use std::sync::Arc; use std::sync::atomic::Ordering; use std::mem; +use rand::{thread_rng, Rng}; + use ln::functional_test_utils::*; #[test] @@ -1191,7 +1192,6 @@ fn duplicate_htlc_test() { } fn do_channel_reserve_test(test_recv: bool) { - use util::rng; use std::sync::atomic::Ordering; use ln::msgs::HandleError; @@ -1308,7 +1308,8 @@ fn do_channel_reserve_test(test_recv: bool) { let secp_ctx = Secp256k1::new(); let session_priv = SecretKey::from_slice(&{ let mut session_key = [0; 32]; - rng::fill_bytes(&mut session_key); + let mut rng = thread_rng(); + rng.fill_bytes(&mut session_key); session_key }).expect("RNG is bad!"); @@ -5082,7 +5083,8 @@ fn test_update_add_htlc_bolt2_receiver_check_max_htlc_limit() { let session_priv = SecretKey::from_slice(&{ let mut session_key = [0; 32]; - rng::fill_bytes(&mut session_key); + let mut rng = thread_rng(); + rng.fill_bytes(&mut session_key); session_key }).expect("RNG is bad!"); diff --git a/src/ln/peer_channel_encryptor.rs b/src/ln/peer_channel_encryptor.rs index f13b886d7..9d716a2dc 100644 --- a/src/ln/peer_channel_encryptor.rs +++ b/src/ln/peer_channel_encryptor.rs @@ -10,7 +10,7 @@ use secp256k1::ecdh::SharedSecret; use secp256k1; use util::chacha20poly1305rfc::ChaCha20Poly1305RFC; -use util::{byte_utils,rng}; +use util::byte_utils; // Sha256("Noise_XK_secp256k1_ChaChaPoly_SHA256") 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]; @@ -70,12 +70,8 @@ pub struct PeerChannelEncryptor { } impl PeerChannelEncryptor { - pub fn new_outbound(their_node_id: PublicKey) -> PeerChannelEncryptor { - let mut key = [0u8; 32]; - rng::fill_bytes(&mut key); - + pub fn new_outbound(their_node_id: PublicKey, ephemeral_key: SecretKey) -> PeerChannelEncryptor { let secp_ctx = Secp256k1::signing_only(); - let sec_key = SecretKey::from_slice(&key).unwrap(); //TODO: nicer rng-is-bad error message let mut sha = Sha256::engine(); sha.input(&NOISE_H); @@ -88,7 +84,7 @@ impl PeerChannelEncryptor { noise_state: NoiseState::InProgress { state: NoiseStep::PreActOne, directional_state: DirectionalNoiseState::Outbound { - ie: sec_key, + ie: ephemeral_key, }, bidirectional_state: BidirectionalNoiseState { h: h, @@ -243,8 +239,7 @@ impl PeerChannelEncryptor { } } - // Separated for testing: - fn process_act_one_with_ephemeral_key(&mut self, act_one: &[u8], our_node_secret: &SecretKey, our_ephemeral: SecretKey) -> Result<[u8; 50], HandleError> { + pub fn process_act_one_with_keys(&mut self, act_one: &[u8], our_node_secret: &SecretKey, our_ephemeral: SecretKey) -> Result<[u8; 50], HandleError> { assert_eq!(act_one.len(), 50); match self.noise_state { @@ -271,15 +266,6 @@ impl PeerChannelEncryptor { } } - pub fn process_act_one_with_key(&mut self, act_one: &[u8], our_node_secret: &SecretKey) -> Result<[u8; 50], HandleError> { - assert_eq!(act_one.len(), 50); - - let mut key = [0u8; 32]; - rng::fill_bytes(&mut key); - let our_ephemeral_key = SecretKey::from_slice(&key).unwrap(); //TODO: nicer rng-is-bad error message - self.process_act_one_with_ephemeral_key(act_one, our_node_secret, our_ephemeral_key) - } - pub fn process_act_two(&mut self, act_two: &[u8], our_node_secret: &SecretKey) -> Result<([u8; 66], PublicKey), HandleError> { assert_eq!(act_two.len(), 50); @@ -485,21 +471,12 @@ mod tests { use hex; - use ln::peer_channel_encryptor::{PeerChannelEncryptor,NoiseState,DirectionalNoiseState}; + use ln::peer_channel_encryptor::{PeerChannelEncryptor,NoiseState}; fn get_outbound_peer_for_initiator_test_vectors() -> PeerChannelEncryptor { let their_node_id = PublicKey::from_slice(&hex::decode("028d7500dd4c12685d1f568b4c2b5048e8534b873319f3a8daa612b469132ec7f7").unwrap()[..]).unwrap(); - let mut outbound_peer = PeerChannelEncryptor::new_outbound(their_node_id); - match outbound_peer.noise_state { - NoiseState::InProgress { state: _, ref mut directional_state, bidirectional_state: _ } => { - *directional_state = DirectionalNoiseState::Outbound { // overwrite ie... - ie: SecretKey::from_slice(&hex::decode("1212121212121212121212121212121212121212121212121212121212121212").unwrap()[..]).unwrap(), - }; - }, - _ => panic!() - } - + 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()[..]); outbound_peer } @@ -566,7 +543,7 @@ mod tests { let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id); let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec(); - assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]); + assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).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 @@ -594,28 +571,28 @@ mod tests { let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id); let act_one = hex::decode("01036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec(); - assert!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err()); + assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err()); } { // transport-responder act1 bad key serialization test let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id); let act_one =hex::decode("00046360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec(); - assert!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err()); + assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err()); } { // transport-responder act1 bad MAC test let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id); let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6b").unwrap().to_vec(); - assert!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err()); + assert!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).is_err()); } { // transport-responder act3 bad version test let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id); let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec(); - assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]); + assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]); let act_three = hex::decode("01b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec(); assert!(inbound_peer.process_act_three(&act_three[..]).is_err()); @@ -629,7 +606,7 @@ mod tests { let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id); let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec(); - assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]); + assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]); let act_three = hex::decode("00c9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139ba").unwrap().to_vec(); assert!(inbound_peer.process_act_three(&act_three[..]).is_err()); @@ -639,7 +616,7 @@ mod tests { let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id); let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec(); - assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]); + assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]); let act_three = hex::decode("00bfe3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa2235536ad09a8ee351870c2bb7f78b754a26c6cef79a98d25139c856d7efd252c2ae73c").unwrap().to_vec(); assert!(inbound_peer.process_act_three(&act_three[..]).is_err()); @@ -649,7 +626,7 @@ mod tests { let mut inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id); let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec(); - assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]); + assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]); let act_three = hex::decode("00b9e3a702e93e3a9948c2ed6e5fd7590a6e1c3a0344cfc9d5b57357049aa22355361aa02e55a8fc28fef5bd6d71ad0c38228dc68b1c466263b47fdf31e560e139bb").unwrap().to_vec(); assert!(inbound_peer.process_act_three(&act_three[..]).is_err()); @@ -692,7 +669,7 @@ mod tests { inbound_peer = PeerChannelEncryptor::new_inbound(&our_node_id); let act_one = hex::decode("00036360e856310ce5d294e8be33fc807077dc56ac80d95d9cd4ddbd21325eff73f70df6086551151f58b8afe6c195782c6a").unwrap().to_vec(); - assert_eq!(inbound_peer.process_act_one_with_ephemeral_key(&act_one[..], &our_node_id, our_ephemeral.clone()).unwrap()[..], hex::decode("0002466d7fcae563e5cb09a0d1870bb580344804617879a14949cf22285f1bae3f276e2470b93aac583c9ef6eafca3f730ae").unwrap()[..]); + assert_eq!(inbound_peer.process_act_one_with_keys(&act_one[..], &our_node_id, our_ephemeral.clone()).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 diff --git a/src/ln/peer_handler.rs b/src/ln/peer_handler.rs index f544ae237..03aeedcda 100644 --- a/src/ln/peer_handler.rs +++ b/src/ln/peer_handler.rs @@ -20,6 +20,10 @@ use std::sync::{Arc, Mutex}; use std::sync::atomic::{AtomicUsize, Ordering}; use std::{cmp,error,hash,fmt}; +use bitcoin_hashes::sha256::Hash as Sha256; +use bitcoin_hashes::sha256::HashEngine as Sha256Engine; +use bitcoin_hashes::{HashEngine, Hash}; + /// Provides references to trait impls which handle different types of messages. pub struct MessageHandler { /// A message handler which handles messages specific to channels. Usually this is just a @@ -151,12 +155,25 @@ impl PeerHolder { } } +#[cfg(not(any(target_pointer_width = "32", target_pointer_width = "64")))] +fn _check_usize_is_32_or_64() { + // See below, less than 32 bit pointers may be unsafe here! + unsafe { mem::transmute::<*const usize, [u8; 4]>(panic!()); } +} + /// A PeerManager manages a set of peers, described by their SocketDescriptor and marshalls socket /// events into messages which it passes on to its MessageHandlers. pub struct PeerManager { message_handler: MessageHandler, peers: Mutex>, our_node_secret: SecretKey, + ephemeral_key_midstate: Sha256Engine, + + // Usize needs to be at least 32 bits to avoid overflowing both low and high. If usize is 64 + // bits we will never realistically count into high: + peer_counter_low: AtomicUsize, + peer_counter_high: AtomicUsize, + initial_syncs_sent: AtomicUsize, logger: Arc, } @@ -188,7 +205,12 @@ const INITIAL_SYNCS_TO_SEND: usize = 5; /// PeerIds may repeat, but only after disconnect_event() has been called. impl PeerManager { /// Constructs a new PeerManager with the given message handlers and node_id secret key - pub fn new(message_handler: MessageHandler, our_node_secret: SecretKey, logger: Arc) -> PeerManager { + /// ephemeral_random_data is used to derive per-connection ephemeral keys and must be + /// cryptographically secure random bytes. + pub fn new(message_handler: MessageHandler, our_node_secret: SecretKey, ephemeral_random_data: &[u8; 32], logger: Arc) -> PeerManager { + let mut ephemeral_key_midstate = Sha256::engine(); + ephemeral_key_midstate.input(ephemeral_random_data); + PeerManager { message_handler: message_handler, peers: Mutex::new(PeerHolder { @@ -197,6 +219,9 @@ impl PeerManager { node_id_to_descriptor: HashMap::new() }), our_node_secret: our_node_secret, + ephemeral_key_midstate, + peer_counter_low: AtomicUsize::new(0), + peer_counter_high: AtomicUsize::new(0), initial_syncs_sent: AtomicUsize::new(0), logger, } @@ -217,6 +242,19 @@ impl PeerManager { }).collect() } + fn get_ephemeral_key(&self) -> SecretKey { + let mut ephemeral_hash = self.ephemeral_key_midstate.clone(); + let low = self.peer_counter_low.fetch_add(1, Ordering::AcqRel); + let high = if low == 0 { + self.peer_counter_high.fetch_add(1, Ordering::AcqRel) + } else { + self.peer_counter_high.load(Ordering::Acquire) + }; + ephemeral_hash.input(&byte_utils::le64_to_array(low as u64)); + ephemeral_hash.input(&byte_utils::le64_to_array(high as u64)); + SecretKey::from_slice(&Sha256::from_engine(ephemeral_hash).into_inner()).expect("You broke SHA-256!") + } + /// Indicates a new outbound connection has been established to a node with the given node_id. /// Note that if an Err is returned here you MUST NOT call disconnect_event for the new /// descriptor but must disconnect the connection immediately. @@ -226,7 +264,7 @@ impl PeerManager { /// Panics if descriptor is duplicative with some other descriptor which has not yet has a /// disconnect_event. pub fn new_outbound_connection(&self, their_node_id: PublicKey, descriptor: Descriptor) -> Result, PeerHandleError> { - let mut peer_encryptor = PeerChannelEncryptor::new_outbound(their_node_id.clone()); + let mut peer_encryptor = PeerChannelEncryptor::new_outbound(their_node_id.clone(), self.get_ephemeral_key()); let res = peer_encryptor.get_act_one().to_vec(); let pending_read_buffer = [0; 50].to_vec(); // Noise act two is 50 bytes @@ -517,7 +555,7 @@ impl PeerManager { let next_step = peer.channel_encryptor.get_noise_step(); match next_step { NextNoiseStep::ActOne => { - let act_two = try_potential_handleerror!(peer.channel_encryptor.process_act_one_with_key(&peer.pending_read_buffer[..], &self.our_node_secret)).to_vec(); + let act_two = try_potential_handleerror!(peer.channel_encryptor.process_act_one_with_keys(&peer.pending_read_buffer[..], &self.our_node_secret, self.get_ephemeral_key())).to_vec(); peer.pending_outbound_buffer.push_back(act_two); peer.pending_read_buffer = [0; 66].to_vec(); // act three is 66 bytes long }, @@ -1096,6 +1134,8 @@ mod tests { let mut peers = Vec::new(); let mut rng = thread_rng(); let logger : Arc = Arc::new(test_utils::TestLogger::new()); + let mut ephemeral_bytes = [0; 32]; + rng.fill_bytes(&mut ephemeral_bytes); for _ in 0..peer_count { let chan_handler = test_utils::TestChannelMessageHandler::new(); @@ -1106,7 +1146,7 @@ mod tests { SecretKey::from_slice(&key_slice).unwrap() }; let msg_handler = MessageHandler { chan_handler: Arc::new(chan_handler), route_handler: Arc::new(router) }; - let peer = PeerManager::new(msg_handler, node_id, Arc::clone(&logger)); + let peer = PeerManager::new(msg_handler, node_id, &ephemeral_bytes, Arc::clone(&logger)); peers.push(peer); } -- 2.39.5