use ln::msgs::DecodeError;
use ln::onion_utils;
-use super::blinded_route::{ForwardTlvs, ReceiveTlvs};
+use super::blinded_route::{BlindedRoute, ForwardTlvs, ReceiveTlvs};
use util::chacha20poly1305rfc::{ChaChaPolyReadAdapter, ChaChaPolyWriteAdapter};
-use util::ser::{FixedLengthReader, LengthRead, LengthReadable, LengthReadableArgs, Readable, ReadableArgs, Writeable, Writer};
+use util::ser::{BigSize, FixedLengthReader, LengthRead, LengthReadable, LengthReadableArgs, Readable, ReadableArgs, Writeable, Writer};
use core::cmp;
use io::{self, Read};
let public_key = Readable::read(r)?;
let mut hop_data = Vec::new();
- let hop_data_len = r.total_bytes() as usize - 66; // 1 (version) + 33 (pubkey) + 32 (HMAC) = 66
+ let hop_data_len = r.total_bytes().saturating_sub(66) as usize; // 1 (version) + 33 (pubkey) + 32 (HMAC) = 66
let mut read_idx = 0;
while read_idx < hop_data_len {
let mut read_buffer = [0; READ_BUFFER_SIZE];
let read_amt = cmp::min(hop_data_len - read_idx, READ_BUFFER_SIZE);
- r.read_exact(&mut read_buffer[..read_amt]);
+ r.read_exact(&mut read_buffer[..read_amt])?;
hop_data.extend_from_slice(&read_buffer[..read_amt]);
read_idx += read_amt;
}
/// This payload is for the final hop.
Receive {
control_tlvs: ReceiveControlTlvs,
+ reply_path: Option<BlindedRoute>,
// Coming soon:
- // reply_path: Option<BlindedRoute>,
// message: Message,
}
}
impl Writeable for (Payload, [u8; 32]) {
fn write<W: Writer>(&self, w: &mut W) -> Result<(), io::Error> {
match &self.0 {
- Payload::Forward(ForwardControlTlvs::Blinded(encrypted_bytes)) |
- Payload::Receive { control_tlvs: ReceiveControlTlvs::Blinded(encrypted_bytes)} => {
+ Payload::Forward(ForwardControlTlvs::Blinded(encrypted_bytes)) => {
encode_varint_length_prefixed_tlv!(w, {
(4, encrypted_bytes, vec_type)
})
},
+ Payload::Receive {
+ control_tlvs: ReceiveControlTlvs::Blinded(encrypted_bytes), reply_path
+ } => {
+ encode_varint_length_prefixed_tlv!(w, {
+ (2, reply_path, option),
+ (4, encrypted_bytes, vec_type)
+ })
+ },
Payload::Forward(ForwardControlTlvs::Unblinded(control_tlvs)) => {
let write_adapter = ChaChaPolyWriteAdapter::new(self.1, &control_tlvs);
encode_varint_length_prefixed_tlv!(w, {
(4, write_adapter, required)
})
},
- Payload::Receive { control_tlvs: ReceiveControlTlvs::Unblinded(control_tlvs)} => {
+ Payload::Receive {
+ control_tlvs: ReceiveControlTlvs::Unblinded(control_tlvs), reply_path,
+ } => {
let write_adapter = ChaChaPolyWriteAdapter::new(self.1, &control_tlvs);
encode_varint_length_prefixed_tlv!(w, {
+ (2, reply_path, option),
(4, write_adapter, required)
})
},
// Uses the provided secret to simultaneously decode and decrypt the control TLVs.
impl ReadableArgs<SharedSecret> for Payload {
- fn read<R: Read>(mut r: &mut R, encrypted_tlvs_ss: SharedSecret) -> Result<Self, DecodeError> {
- use bitcoin::consensus::encode::{Decodable, Error, VarInt};
- let v: VarInt = Decodable::consensus_decode(&mut r)
- .map_err(|e| match e {
- Error::Io(ioe) => DecodeError::from(ioe),
- _ => DecodeError::InvalidValue
- })?;
-
+ fn read<R: Read>(r: &mut R, encrypted_tlvs_ss: SharedSecret) -> Result<Self, DecodeError> {
+ let v: BigSize = Readable::read(r)?;
let mut rd = FixedLengthReader::new(r, v.0);
- // TODO: support reply paths
- let mut _reply_path_bytes: Option<Vec<u8>> = Some(Vec::new());
+ let mut reply_path: Option<BlindedRoute> = None;
let mut read_adapter: Option<ChaChaPolyReadAdapter<ControlTlvs>> = None;
let rho = onion_utils::gen_rho_from_shared_secret(&encrypted_tlvs_ss.secret_bytes());
decode_tlv_stream!(&mut rd, {
- (2, _reply_path_bytes, vec_type),
+ (2, reply_path, option),
(4, read_adapter, (option: LengthReadableArgs, rho))
});
rd.eat_remaining().map_err(|_| DecodeError::ShortRead)?;
Ok(Payload::Forward(ForwardControlTlvs::Unblinded(tlvs)))
},
Some(ChaChaPolyReadAdapter { readable: ControlTlvs::Receive(tlvs)}) => {
- Ok(Payload::Receive { control_tlvs: ReceiveControlTlvs::Unblinded(tlvs)})
+ Ok(Payload::Receive { control_tlvs: ReceiveControlTlvs::Unblinded(tlvs), reply_path })
},
}
}