X-Git-Url: http://git.bitcoin.ninja/index.cgi?a=blobdiff_plain;f=lightning%2Fsrc%2Fln%2Fpeer_channel_encryptor.rs;h=8310edb64e20653591af531770eb464576956dbb;hb=367834ca9039eb64d6f85b6bd4432c735e776b81;hp=68f3c505b9beabf342b2938784f92f63537650ee;hpb=1fc6d6b5ee2451862768979399e381611ef00565;p=rust-lightning diff --git a/lightning/src/ln/peer_channel_encryptor.rs b/lightning/src/ln/peer_channel_encryptor.rs index 68f3c505..8310edb6 100644 --- a/lightning/src/ln/peer_channel_encryptor.rs +++ b/lightning/src/ln/peer_channel_encryptor.rs @@ -1,3 +1,12 @@ +// This file is Copyright its original authors, visible in version control +// history. +// +// This file is licensed under the Apache License, Version 2.0 or the MIT license +// , at your option. +// You may not use this file except in accordance with one or both of these +// licenses. + use ln::msgs::LightningError; use ln::msgs; @@ -13,6 +22,11 @@ use util::chacha20poly1305rfc::ChaCha20Poly1305RFC; use util::byte_utils; use bitcoin::hashes::hex::ToHex; +/// 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): +pub const LN_MAX_MSG_LEN: usize = ::std::u16::MAX as usize; // Must be equal to 65535 + // 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]; // Sha256(NOISE_CK || "lightning") @@ -374,7 +388,7 @@ impl PeerChannelEncryptor { /// Encrypts the given 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 { - if msg.len() > 65535 { + if msg.len() > LN_MAX_MSG_LEN { panic!("Attempted to encrypt message longer than 65535 bytes!"); } @@ -421,15 +435,15 @@ impl PeerChannelEncryptor { *rn += 1; Ok(byte_utils::slice_to_be16(&res)) }, - _ => panic!("Tried to encrypt a message prior to noise handshake completion"), + _ => panic!("Tried to decrypt a message prior to noise handshake completion"), } } /// Decrypts the given message. /// panics if msg.len() > 65535 + 16 pub fn decrypt_message(&mut self, msg: &[u8]) -> Result, LightningError> { - if msg.len() > 65535 + 16 { - panic!("Attempted to encrypt message longer than 65535 bytes!"); + if msg.len() > LN_MAX_MSG_LEN + 16 { + panic!("Attempted to decrypt message longer than 65535 + 16 bytes!"); } match self.noise_state { @@ -441,7 +455,7 @@ impl PeerChannelEncryptor { Ok(res) }, - _ => panic!("Tried to encrypt a message prior to noise handshake completion"), + _ => panic!("Tried to decrypt a message prior to noise handshake completion"), } } @@ -468,6 +482,8 @@ impl PeerChannelEncryptor { #[cfg(test)] mod tests { + use super::LN_MAX_MSG_LEN; + use bitcoin::secp256k1::key::{PublicKey,SecretKey}; use hex; @@ -482,6 +498,36 @@ mod tests { outbound_peer } + fn get_inbound_peer_for_test_vectors() -> PeerChannelEncryptor { + // 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 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_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 + // from transport-initiator successful handshake + assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex::decode("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]); + + match inbound_peer.noise_state { + NoiseState::Finished { sk, sn, sck, rk, rn, rck } => { + assert_eq!(sk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]); + assert_eq!(sn, 0); + assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]); + assert_eq!(rk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]); + assert_eq!(rn, 0); + assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]); + }, + _ => panic!() + } + + inbound_peer + } + #[test] fn noise_initiator_test_vectors() { let our_node_id = SecretKey::from_slice(&hex::decode("1111111111111111111111111111111111111111111111111111111111111111").unwrap()[..]).unwrap(); @@ -540,28 +586,7 @@ mod tests { let our_ephemeral = SecretKey::from_slice(&hex::decode("2222222222222222222222222222222222222222222222222222222222222222").unwrap()[..]).unwrap(); { - // transport-responder successful handshake - 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_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 - // from transport-initiator successful handshake - assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex::decode("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]); - - match inbound_peer.noise_state { - NoiseState::Finished { sk, sn, sck, rk, rn, rck } => { - assert_eq!(sk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]); - assert_eq!(sn, 0); - assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]); - assert_eq!(rk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]); - assert_eq!(rn, 0); - assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]); - }, - _ => panic!() - } + let _ = get_inbound_peer_for_test_vectors(); } { // transport-responder act1 short read test @@ -660,35 +685,7 @@ mod tests { } } - let mut inbound_peer; - - { - // 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(); - - 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_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 - // from transport-initiator successful handshake - assert_eq!(inbound_peer.process_act_three(&act_three[..]).unwrap().serialize()[..], hex::decode("034f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa").unwrap()[..]); - - match inbound_peer.noise_state { - NoiseState::Finished { sk, sn, sck, rk, rn, rck } => { - assert_eq!(sk, hex::decode("bb9020b8965f4df047e07f955f3c4b88418984aadc5cdb35096b9ea8fa5c3442").unwrap()[..]); - assert_eq!(sn, 0); - assert_eq!(sck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]); - assert_eq!(rk, hex::decode("969ab31b4d288cedf6218839b27a3e2140827047f2c0f01bf5c04435d43511a9").unwrap()[..]); - assert_eq!(rn, 0); - assert_eq!(rck, hex::decode("919219dbb2920afa8db80f9a51787a840bcf111ed8d588caf9ab4be716e42b01").unwrap()[..]); - }, - _ => panic!() - } - } + let mut inbound_peer = get_inbound_peer_for_test_vectors(); for i in 0..1005 { let msg = [0x68, 0x65, 0x6c, 0x6c, 0x6f]; @@ -714,4 +711,28 @@ mod tests { } } } + + #[test] + fn max_msg_len_limit_value() { + assert_eq!(LN_MAX_MSG_LEN, 65535); + assert_eq!(LN_MAX_MSG_LEN, ::std::u16::MAX as usize); + } + + #[test] + #[should_panic(expected = "Attempted to encrypt message longer than 65535 bytes!")] + 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); + } + + #[test] + #[should_panic(expected = "Attempted to decrypt message longer than 65535 + 16 bytes!")] + fn max_message_len_decryption() { + let mut inbound_peer = get_inbound_peer_for_test_vectors(); + + // MSG should not exceed LN_MAX_MSG_LEN + 16 + let msg = [4u8; LN_MAX_MSG_LEN + 17]; + inbound_peer.decrypt_message(&msg).unwrap(); + } }