// Copyright 2015-2019 Parity Technologies (UK) Ltd. // This file is part of Parity Ethereum. // Parity Ethereum is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // Parity Ethereum is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License // along with Parity Ethereum. If not, see . use std::time::Duration; use rand::random; use hash::write_keccak; use mio::tcp::*; use ethereum_types::{H256, H520}; use parity_bytes::Bytes; use rlp::{Rlp, RlpStream}; use connection::Connection; use node_table::NodeId; use io::{IoContext, StreamToken}; use ethkey::{KeyPair, Public, Secret, recover, sign, Generator, Random}; use ethkey::crypto::{ecdh, ecies}; use network::{Error, ErrorKind}; use host::HostInfo; #[derive(PartialEq, Eq, Debug)] enum HandshakeState { /// Just created New, /// Waiting for auth packet ReadingAuth, /// Waiting for extended auth packet ReadingAuthEip8, /// Waiting for ack packet ReadingAck, /// Waiting for extended ack packet ReadingAckEip8, /// Ready to start a session StartSession, } /// `RLPx` protocol handshake. See https://github.com/ethereum/devp2p/blob/master/rlpx.md#encrypted-handshake pub struct Handshake { /// Remote node public key pub id: NodeId, /// Underlying connection pub connection: Connection, /// Handshake state state: HandshakeState, /// Outgoing or incoming connection pub originated: bool, /// ECDH ephemeral pub ecdhe: KeyPair, /// Connection nonce pub nonce: H256, /// Handshake public key pub remote_ephemeral: Public, /// Remote connection nonce. pub remote_nonce: H256, /// Remote `RLPx` protocol version. pub remote_version: u64, /// A copy of received encrypted auth packet pub auth_cipher: Bytes, /// A copy of received encrypted ack packet pub ack_cipher: Bytes, } const V4_AUTH_PACKET_SIZE: usize = 307; const V4_ACK_PACKET_SIZE: usize = 210; const HANDSHAKE_TIMEOUT: Duration = Duration::from_secs(5); const PROTOCOL_VERSION: u64 = 4; // Amount of bytes added when encrypting with encryptECIES. const ECIES_OVERHEAD: usize = 113; impl Handshake { /// Create a new handshake object pub fn new(token: StreamToken, id: Option<&NodeId>, socket: TcpStream, nonce: &H256) -> Result { Ok(Handshake { id: if let Some(id) = id { *id } else { NodeId::new() }, connection: Connection::new(token, socket), originated: false, state: HandshakeState::New, ecdhe: Random.generate()?, nonce: *nonce, remote_ephemeral: Public::new(), remote_nonce: H256::new(), remote_version: PROTOCOL_VERSION, auth_cipher: Bytes::new(), ack_cipher: Bytes::new(), }) } /// Start a handshake pub fn start(&mut self, io: &IoContext, host: &HostInfo, originated: bool) -> Result<(), Error> where Message: Send + Clone+ Sync + 'static { self.originated = originated; io.register_timer(self.connection.token, HANDSHAKE_TIMEOUT).ok(); if originated { self.write_auth(io, host.secret(), host.id())?; } else { self.state = HandshakeState::ReadingAuth; self.connection.expect(V4_AUTH_PACKET_SIZE); }; Ok(()) } /// Check if handshake is complete pub fn done(&self) -> bool { self.state == HandshakeState::StartSession } /// Readable IO handler. Drives the state change. pub fn readable(&mut self, io: &IoContext, host: &HostInfo) -> Result<(), Error> where Message: Send + Clone + Sync + 'static { while let Some(data) = self.connection.readable()? { match self.state { HandshakeState::New => {}, HandshakeState::StartSession => {}, HandshakeState::ReadingAuth => { self.read_auth(io, host.secret(), &data)?; }, HandshakeState::ReadingAuthEip8 => { self.read_auth_eip8(io, host.secret(), &data)?; }, HandshakeState::ReadingAck => { self.read_ack(host.secret(), &data)?; }, HandshakeState::ReadingAckEip8 => { self.read_ack_eip8(host.secret(), &data)?; }, } if self.state == HandshakeState::StartSession { io.clear_timer(self.connection.token).ok(); break; } } Ok(()) } /// Writable IO handler. pub fn writable(&mut self, io: &IoContext) -> Result<(), Error> where Message: Send + Clone + Sync + 'static { self.connection.writable(io)?; Ok(()) } fn set_auth(&mut self, host_secret: &Secret, sig: &[u8], remote_public: &[u8], remote_nonce: &[u8], remote_version: u64) -> Result<(), Error> { self.id.clone_from_slice(remote_public); self.remote_nonce.clone_from_slice(remote_nonce); self.remote_version = remote_version; let shared = *ecdh::agree(host_secret, &self.id)?; let signature = H520::from_slice(sig); self.remote_ephemeral = recover(&signature.into(), &(shared ^ self.remote_nonce))?; Ok(()) } /// Parse, validate and confirm auth message fn read_auth(&mut self, io: &IoContext, secret: &Secret, data: &[u8]) -> Result<(), Error> where Message: Send + Clone + Sync + 'static { trace!(target: "network", "Received handshake auth from {:?}", self.connection.remote_addr_str()); if data.len() != V4_AUTH_PACKET_SIZE { debug!(target: "network", "Wrong auth packet size"); return Err(ErrorKind::BadProtocol.into()); } self.auth_cipher = data.to_vec(); match ecies::decrypt(secret, &[], data) { Ok(auth) => { let (sig, rest) = auth.split_at(65); let (_, rest) = rest.split_at(32); let (pubk, rest) = rest.split_at(64); let (nonce, _) = rest.split_at(32); self.set_auth(secret, sig, pubk, nonce, PROTOCOL_VERSION)?; self.write_ack(io)?; } Err(_) => { // Try to interpret as EIP-8 packet let total = ((u16::from(data[0]) << 8 | (u16::from(data[1]))) as usize) + 2; if total < V4_AUTH_PACKET_SIZE { debug!(target: "network", "Wrong EIP8 auth packet size"); return Err(ErrorKind::BadProtocol.into()); } let rest = total - data.len(); self.state = HandshakeState::ReadingAuthEip8; self.connection.expect(rest); } } Ok(()) } fn read_auth_eip8(&mut self, io: &IoContext, secret: &Secret, data: &[u8]) -> Result<(), Error> where Message: Send + Clone + Sync + 'static { trace!(target: "network", "Received EIP8 handshake auth from {:?}", self.connection.remote_addr_str()); self.auth_cipher.extend_from_slice(data); let auth = ecies::decrypt(secret, &self.auth_cipher[0..2], &self.auth_cipher[2..])?; let rlp = Rlp::new(&auth); let signature: H520 = rlp.val_at(0)?; let remote_public: Public = rlp.val_at(1)?; let remote_nonce: H256 = rlp.val_at(2)?; let remote_version: u64 = rlp.val_at(3)?; self.set_auth(secret, &signature, &remote_public, &remote_nonce, remote_version)?; self.write_ack_eip8(io)?; Ok(()) } /// Parse and validate ack message fn read_ack(&mut self, secret: &Secret, data: &[u8]) -> Result<(), Error> { trace!(target: "network", "Received handshake ack from {:?}", self.connection.remote_addr_str()); if data.len() != V4_ACK_PACKET_SIZE { debug!(target: "network", "Wrong ack packet size"); return Err(ErrorKind::BadProtocol.into()); } self.ack_cipher = data.to_vec(); match ecies::decrypt(secret, &[], data) { Ok(ack) => { self.remote_ephemeral.clone_from_slice(&ack[0..64]); self.remote_nonce.clone_from_slice(&ack[64..(64+32)]); self.state = HandshakeState::StartSession; } Err(_) => { // Try to interpret as EIP-8 packet let total = (((u16::from(data[0])) << 8 | (u16::from(data[1]))) as usize) + 2; if total < V4_ACK_PACKET_SIZE { debug!(target: "network", "Wrong EIP8 ack packet size"); return Err(ErrorKind::BadProtocol.into()); } let rest = total - data.len(); self.state = HandshakeState::ReadingAckEip8; self.connection.expect(rest); } } Ok(()) } fn read_ack_eip8(&mut self, secret: &Secret, data: &[u8]) -> Result<(), Error> { trace!(target: "network", "Received EIP8 handshake auth from {:?}", self.connection.remote_addr_str()); self.ack_cipher.extend_from_slice(data); let ack = ecies::decrypt(secret, &self.ack_cipher[0..2], &self.ack_cipher[2..])?; let rlp = Rlp::new(&ack); self.remote_ephemeral = rlp.val_at(0)?; self.remote_nonce = rlp.val_at(1)?; self.remote_version = rlp.val_at(2)?; self.state = HandshakeState::StartSession; Ok(()) } /// Sends auth message fn write_auth(&mut self, io: &IoContext, secret: &Secret, public: &Public) -> Result<(), Error> where Message: Send + Clone + Sync + 'static { trace!(target: "network", "Sending handshake auth to {:?}", self.connection.remote_addr_str()); let mut data = [0u8; /*Signature::SIZE*/ 65 + /*H256::SIZE*/ 32 + /*Public::SIZE*/ 64 + /*H256::SIZE*/ 32 + 1]; //TODO: use associated constants let len = data.len(); { data[len - 1] = 0x0; let (sig, rest) = data.split_at_mut(65); let (hepubk, rest) = rest.split_at_mut(32); let (pubk, rest) = rest.split_at_mut(64); let (nonce, _) = rest.split_at_mut(32); // E(remote-pubk, S(ecdhe-random, ecdh-shared-secret^nonce) || H(ecdhe-random-pubk) || pubk || nonce || 0x0) let shared = *ecdh::agree(secret, &self.id)?; sig.copy_from_slice(&*sign(self.ecdhe.secret(), &(shared ^ self.nonce))?); write_keccak(self.ecdhe.public(), hepubk); pubk.copy_from_slice(public); nonce.copy_from_slice(&self.nonce); } let message = ecies::encrypt(&self.id, &[], &data)?; self.auth_cipher = message.clone(); self.connection.send(io, message); self.connection.expect(V4_ACK_PACKET_SIZE); self.state = HandshakeState::ReadingAck; Ok(()) } /// Sends ack message fn write_ack(&mut self, io: &IoContext) -> Result<(), Error> where Message: Send + Clone + Sync + 'static { trace!(target: "network", "Sending handshake ack to {:?}", self.connection.remote_addr_str()); let mut data = [0u8; 1 + /*Public::SIZE*/ 64 + /*H256::SIZE*/ 32]; //TODO: use associated constants let len = data.len(); { data[len - 1] = 0x0; let (epubk, rest) = data.split_at_mut(64); let (nonce, _) = rest.split_at_mut(32); self.ecdhe.public().copy_to(epubk); self.nonce.copy_to(nonce); } let message = ecies::encrypt(&self.id, &[], &data)?; self.ack_cipher = message.clone(); self.connection.send(io, message); self.state = HandshakeState::StartSession; Ok(()) } /// Sends EIP8 ack message fn write_ack_eip8(&mut self, io: &IoContext) -> Result<(), Error> where Message: Send + Clone + Sync + 'static { trace!(target: "network", "Sending EIP8 handshake ack to {:?}", self.connection.remote_addr_str()); let mut rlp = RlpStream::new_list(3); rlp.append(self.ecdhe.public()); rlp.append(&self.nonce); rlp.append(&PROTOCOL_VERSION); let pad_array = [0u8; 200]; let pad = &pad_array[0 .. 100 + random::() % 100]; rlp.append_raw(pad, 0); let encoded = rlp.drain(); let len = (encoded.len() + ECIES_OVERHEAD) as u16; let prefix = [ (len >> 8) as u8, (len & 0xff) as u8 ]; let message = ecies::encrypt(&self.id, &prefix, &encoded)?; self.ack_cipher.extend_from_slice(&prefix); self.ack_cipher.extend_from_slice(&message); self.connection.send(io, self.ack_cipher.clone()); self.state = HandshakeState::StartSession; Ok(()) } } #[cfg(test)] mod test { use rustc_hex::FromHex; use super::*; use ethereum_types::H256; use io::*; use mio::tcp::TcpStream; use ethkey::Public; fn check_auth(h: &Handshake, version: u64) { assert_eq!(h.id, "fda1cff674c90c9a197539fe3dfb53086ace64f83ed7c6eabec741f7f381cc803e52ab2cd55d5569bce4347107a310dfd5f88a010cd2ffd1005ca406f1842877".into()); assert_eq!(h.remote_nonce, "7e968bba13b6c50e2c4cd7f241cc0d64d1ac25c7f5952df231ac6a2bda8ee5d6".into()); assert_eq!(h.remote_ephemeral, "654d1044b69c577a44e5f01a1209523adb4026e70c62d1c13a067acabc09d2667a49821a0ad4b634554d330a15a58fe61f8a8e0544b310c6de7b0c8da7528a8d".into()); assert_eq!(h.remote_version, version); } fn check_ack(h: &Handshake, version: u64) { assert_eq!(h.remote_nonce, "559aead08264d5795d3909718cdd05abd49572e84fe55590eef31a88a08fdffd".into()); assert_eq!(h.remote_ephemeral, "b6d82fa3409da933dbf9cb0140c5dde89f4e64aec88d476af648880f4a10e1e49fe35ef3e69e93dd300b4797765a747c6384a6ecf5db9c2690398607a86181e4".into()); assert_eq!(h.remote_version, version); } fn create_handshake(to: Option<&Public>) -> Handshake { let addr = "127.0.0.1:50556".parse().unwrap(); let socket = TcpStream::connect(&addr).unwrap(); let nonce = H256::new(); Handshake::new(0, to, socket, &nonce).unwrap() } fn test_io() -> IoContext { IoContext::new(IoChannel::disconnected(), 0) } #[test] fn test_handshake_auth_plain() { let mut h = create_handshake(None); let secret = "b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291".parse().unwrap(); let auth = "\ 048ca79ad18e4b0659fab4853fe5bc58eb83992980f4c9cc147d2aa31532efd29a3d3dc6a3d89eaf\ 913150cfc777ce0ce4af2758bf4810235f6e6ceccfee1acc6b22c005e9e3a49d6448610a58e98744\ ba3ac0399e82692d67c1f58849050b3024e21a52c9d3b01d871ff5f210817912773e610443a9ef14\ 2e91cdba0bd77b5fdf0769b05671fc35f83d83e4d3b0b000c6b2a1b1bba89e0fc51bf4e460df3105\ c444f14be226458940d6061c296350937ffd5e3acaceeaaefd3c6f74be8e23e0f45163cc7ebd7622\ 0f0128410fd05250273156d548a414444ae2f7dea4dfca2d43c057adb701a715bf59f6fb66b2d1d2\ 0f2c703f851cbf5ac47396d9ca65b6260bd141ac4d53e2de585a73d1750780db4c9ee4cd4d225173\ a4592ee77e2bd94d0be3691f3b406f9bba9b591fc63facc016bfa8\ ".from_hex().unwrap(); h.read_auth(&test_io(), &secret, &auth).unwrap(); assert_eq!(h.state, super::HandshakeState::StartSession); check_auth(&h, 4); } #[test] fn test_handshake_auth_eip8() { let mut h = create_handshake(None); let secret = "b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291".parse().unwrap(); let auth = "\ 01b304ab7578555167be8154d5cc456f567d5ba302662433674222360f08d5f1534499d3678b513b\ 0fca474f3a514b18e75683032eb63fccb16c156dc6eb2c0b1593f0d84ac74f6e475f1b8d56116b84\ 9634a8c458705bf83a626ea0384d4d7341aae591fae42ce6bd5c850bfe0b999a694a49bbbaf3ef6c\ da61110601d3b4c02ab6c30437257a6e0117792631a4b47c1d52fc0f8f89caadeb7d02770bf999cc\ 147d2df3b62e1ffb2c9d8c125a3984865356266bca11ce7d3a688663a51d82defaa8aad69da39ab6\ d5470e81ec5f2a7a47fb865ff7cca21516f9299a07b1bc63ba56c7a1a892112841ca44b6e0034dee\ 70c9adabc15d76a54f443593fafdc3b27af8059703f88928e199cb122362a4b35f62386da7caad09\ c001edaeb5f8a06d2b26fb6cb93c52a9fca51853b68193916982358fe1e5369e249875bb8d0d0ec3\ 6f917bc5e1eafd5896d46bd61ff23f1a863a8a8dcd54c7b109b771c8e61ec9c8908c733c0263440e\ 2aa067241aaa433f0bb053c7b31a838504b148f570c0ad62837129e547678c5190341e4f1693956c\ 3bf7678318e2d5b5340c9e488eefea198576344afbdf66db5f51204a6961a63ce072c8926c\ ".from_hex().unwrap(); h.read_auth(&test_io(), &secret, &auth[0..super::V4_AUTH_PACKET_SIZE]).unwrap(); assert_eq!(h.state, super::HandshakeState::ReadingAuthEip8); h.read_auth_eip8(&test_io(), &secret, &auth[super::V4_AUTH_PACKET_SIZE..]).unwrap(); assert_eq!(h.state, super::HandshakeState::StartSession); check_auth(&h, 4); } #[test] fn test_handshake_auth_eip8_2() { let mut h = create_handshake(None); let secret = "b71c71a67e1177ad4e901695e1b4b9ee17ae16c6668d313eac2f96dbcda3f291".parse().unwrap(); let auth = "\ 01b8044c6c312173685d1edd268aa95e1d495474c6959bcdd10067ba4c9013df9e40ff45f5bfd6f7\ 2471f93a91b493f8e00abc4b80f682973de715d77ba3a005a242eb859f9a211d93a347fa64b597bf\ 280a6b88e26299cf263b01b8dfdb712278464fd1c25840b995e84d367d743f66c0e54a586725b7bb\ f12acca27170ae3283c1073adda4b6d79f27656993aefccf16e0d0409fe07db2dc398a1b7e8ee93b\ cd181485fd332f381d6a050fba4c7641a5112ac1b0b61168d20f01b479e19adf7fdbfa0905f63352\ bfc7e23cf3357657455119d879c78d3cf8c8c06375f3f7d4861aa02a122467e069acaf513025ff19\ 6641f6d2810ce493f51bee9c966b15c5043505350392b57645385a18c78f14669cc4d960446c1757\ 1b7c5d725021babbcd786957f3d17089c084907bda22c2b2675b4378b114c601d858802a55345a15\ 116bc61da4193996187ed70d16730e9ae6b3bb8787ebcaea1871d850997ddc08b4f4ea668fbf3740\ 7ac044b55be0908ecb94d4ed172ece66fd31bfdadf2b97a8bc690163ee11f5b575a4b44e36e2bfb2\ f0fce91676fd64c7773bac6a003f481fddd0bae0a1f31aa27504e2a533af4cef3b623f4791b2cca6\ d490\ ".from_hex().unwrap(); h.read_auth(&test_io(), &secret, &auth[0..super::V4_AUTH_PACKET_SIZE]).unwrap(); assert_eq!(h.state, super::HandshakeState::ReadingAuthEip8); h.read_auth_eip8(&test_io(), &secret, &auth[super::V4_AUTH_PACKET_SIZE..]).unwrap(); assert_eq!(h.state, super::HandshakeState::StartSession); check_auth(&h, 56); let ack = h.ack_cipher.clone(); let total = (((ack[0] as u16) << 8 | (ack[1] as u16)) as usize) + 2; assert_eq!(ack.len(), total); } #[test] fn test_handshake_ack_plain() { let remote = "fda1cff674c90c9a197539fe3dfb53086ace64f83ed7c6eabec741f7f381cc803e52ab2cd55d5569bce4347107a310dfd5f88a010cd2ffd1005ca406f1842877".into(); let mut h = create_handshake(Some(&remote)); let secret = "49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee".parse().unwrap(); let ack = "\ 049f8abcfa9c0dc65b982e98af921bc0ba6e4243169348a236abe9df5f93aa69d99cadddaa387662\ b0ff2c08e9006d5a11a278b1b3331e5aaabf0a32f01281b6f4ede0e09a2d5f585b26513cb794d963\ 5a57563921c04a9090b4f14ee42be1a5461049af4ea7a7f49bf4c97a352d39c8d02ee4acc416388c\ 1c66cec761d2bc1c72da6ba143477f049c9d2dde846c252c111b904f630ac98e51609b3b1f58168d\ dca6505b7196532e5f85b259a20c45e1979491683fee108e9660edbf38f3add489ae73e3dda2c71b\ d1497113d5c755e942d1\ ".from_hex().unwrap(); h.read_ack(&secret, &ack).unwrap(); assert_eq!(h.state, super::HandshakeState::StartSession); check_ack(&h, 4); } #[test] fn test_handshake_ack_eip8() { let remote = "fda1cff674c90c9a197539fe3dfb53086ace64f83ed7c6eabec741f7f381cc803e52ab2cd55d5569bce4347107a310dfd5f88a010cd2ffd1005ca406f1842877".into(); let mut h = create_handshake(Some(&remote)); let secret = "49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee".parse().unwrap(); let ack = "\ 01ea0451958701280a56482929d3b0757da8f7fbe5286784beead59d95089c217c9b917788989470\ b0e330cc6e4fb383c0340ed85fab836ec9fb8a49672712aeabbdfd1e837c1ff4cace34311cd7f4de\ 05d59279e3524ab26ef753a0095637ac88f2b499b9914b5f64e143eae548a1066e14cd2f4bd7f814\ c4652f11b254f8a2d0191e2f5546fae6055694aed14d906df79ad3b407d94692694e259191cde171\ ad542fc588fa2b7333313d82a9f887332f1dfc36cea03f831cb9a23fea05b33deb999e85489e645f\ 6aab1872475d488d7bd6c7c120caf28dbfc5d6833888155ed69d34dbdc39c1f299be1057810f34fb\ e754d021bfca14dc989753d61c413d261934e1a9c67ee060a25eefb54e81a4d14baff922180c395d\ 3f998d70f46f6b58306f969627ae364497e73fc27f6d17ae45a413d322cb8814276be6ddd13b885b\ 201b943213656cde498fa0e9ddc8e0b8f8a53824fbd82254f3e2c17e8eaea009c38b4aa0a3f306e8\ 797db43c25d68e86f262e564086f59a2fc60511c42abfb3057c247a8a8fe4fb3ccbadde17514b7ac\ 8000cdb6a912778426260c47f38919a91f25f4b5ffb455d6aaaf150f7e5529c100ce62d6d92826a7\ 1778d809bdf60232ae21ce8a437eca8223f45ac37f6487452ce626f549b3b5fdee26afd2072e4bc7\ 5833c2464c805246155289f4\ ".from_hex().unwrap(); h.read_ack(&secret, &ack[0..super::V4_ACK_PACKET_SIZE]).unwrap(); assert_eq!(h.state, super::HandshakeState::ReadingAckEip8); h.read_ack_eip8(&secret, &ack[super::V4_ACK_PACKET_SIZE..]).unwrap(); assert_eq!(h.state, super::HandshakeState::StartSession); check_ack(&h, 4); } #[test] fn test_handshake_ack_eip8_2() { let remote = "fda1cff674c90c9a197539fe3dfb53086ace64f83ed7c6eabec741f7f381cc803e52ab2cd55d5569bce4347107a310dfd5f88a010cd2ffd1005ca406f1842877".into(); let mut h = create_handshake(Some(&remote)); let secret = "49a7b37aa6f6645917e7b807e9d1c00d4fa71f18343b0d4122a4d2df64dd6fee".parse().unwrap(); let ack = "\ 01f004076e58aae772bb101ab1a8e64e01ee96e64857ce82b1113817c6cdd52c09d26f7b90981cd7\ ae835aeac72e1573b8a0225dd56d157a010846d888dac7464baf53f2ad4e3d584531fa203658fab0\ 3a06c9fd5e35737e417bc28c1cbf5e5dfc666de7090f69c3b29754725f84f75382891c561040ea1d\ dc0d8f381ed1b9d0d4ad2a0ec021421d847820d6fa0ba66eaf58175f1b235e851c7e2124069fbc20\ 2888ddb3ac4d56bcbd1b9b7eab59e78f2e2d400905050f4a92dec1c4bdf797b3fc9b2f8e84a482f3\ d800386186712dae00d5c386ec9387a5e9c9a1aca5a573ca91082c7d68421f388e79127a5177d4f8\ 590237364fd348c9611fa39f78dcdceee3f390f07991b7b47e1daa3ebcb6ccc9607811cb17ce51f1\ c8c2c5098dbdd28fca547b3f58c01a424ac05f869f49c6a34672ea2cbbc558428aa1fe48bbfd6115\ 8b1b735a65d99f21e70dbc020bfdface9f724a0d1fb5895db971cc81aa7608baa0920abb0a565c9c\ 436e2fd13323428296c86385f2384e408a31e104670df0791d93e743a3a5194ee6b076fb6323ca59\ 3011b7348c16cf58f66b9633906ba54a2ee803187344b394f75dd2e663a57b956cb830dd7a908d4f\ 39a2336a61ef9fda549180d4ccde21514d117b6c6fd07a9102b5efe710a32af4eeacae2cb3b1dec0\ 35b9593b48b9d3ca4c13d245d5f04169b0b1\ ".from_hex().unwrap(); h.read_ack(&secret, &ack[0..super::V4_ACK_PACKET_SIZE]).unwrap(); assert_eq!(h.state, super::HandshakeState::ReadingAckEip8); h.read_ack_eip8(&secret, &ack[super::V4_ACK_PACKET_SIZE..]).unwrap(); assert_eq!(h.state, super::HandshakeState::StartSession); check_ack(&h, 57); } }