use bitcoin::secp256k1::ecdh::SharedSecret;
use super::BlindedPath;
+use crate::ln::msgs::DecodeError;
use crate::ln::onion_utils;
use crate::onion_message::Destination;
+use crate::util::chacha20poly1305rfc::ChaChaPolyWriteAdapter;
+use crate::util::ser::{Readable, VecWriter, Writeable};
+use crate::io;
use crate::prelude::*;
// TODO: DRY with onion_utils::construct_onion_keys_callback
#[inline]
-pub(crate) fn construct_keys_callback<T: secp256k1::Signing + secp256k1::Verification,
- FType: FnMut(PublicKey, SharedSecret, PublicKey, [u8; 32], Option<PublicKey>, Option<Vec<u8>>)>(
- secp_ctx: &Secp256k1<T>, unblinded_path: &[PublicKey], destination: Option<Destination>,
- session_priv: &SecretKey, mut callback: FType
-) -> Result<(), secp256k1::Error> {
+pub(crate) fn construct_keys_callback<'a, T, I, F>(
+ secp_ctx: &Secp256k1<T>, unblinded_path: I, destination: Option<Destination>,
+ session_priv: &SecretKey, mut callback: F
+) -> Result<(), secp256k1::Error>
+where
+ T: secp256k1::Signing + secp256k1::Verification,
+ I: Iterator<Item=&'a PublicKey>,
+ F: FnMut(PublicKey, SharedSecret, PublicKey, [u8; 32], Option<PublicKey>, Option<Vec<u8>>),
+{
let mut msg_blinding_point_priv = session_priv.clone();
let mut msg_blinding_point = PublicKey::from_secret_key(secp_ctx, &msg_blinding_point_priv);
let mut onion_packet_pubkey_priv = msg_blinding_point_priv.clone();
}
Ok(())
}
+
+/// Encrypt TLV payload to be used as a [`crate::blinded_path::BlindedHop::encrypted_payload`].
+pub(super) fn encrypt_payload<P: Writeable>(payload: P, encrypted_tlvs_ss: [u8; 32]) -> Vec<u8> {
+ let mut writer = VecWriter(Vec::new());
+ let write_adapter = ChaChaPolyWriteAdapter::new(encrypted_tlvs_ss, &payload);
+ write_adapter.write(&mut writer).expect("In-memory writes cannot fail");
+ writer.0
+}
+
+/// Blinded path encrypted payloads may be padded to ensure they are equal length.
+///
+/// Reads padding to the end, ignoring what's read.
+pub(crate) struct Padding {}
+impl Readable for Padding {
+ #[inline]
+ fn read<R: io::Read>(reader: &mut R) -> Result<Self, DecodeError> {
+ loop {
+ let mut buf = [0; 8192];
+ if reader.read(&mut buf[..])? == 0 { break; }
+ }
+ Ok(Self {})
+ }
+}