Jedrzej Stuczynski
47 lines
1.6 KiB
Rust
47 lines
1.6 KiB
Rust
use crate::clients::directory::presence::Topology;
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use crate::utils::{bytes, topology};
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use curve25519_dalek::montgomery::MontgomeryPoint;
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use sphinx::route::{Destination, DestinationAddressBytes, Node, NodeAddressBytes, SURBIdentifier};
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use sphinx::SphinxPacket;
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const LOOP_COVER_MESSAGE_PAYLOAD: &[u8] = b"The cake is a lie!";
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pub fn loop_cover_message(
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our_address: DestinationAddressBytes,
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surb_id: SURBIdentifier,
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topology: &Topology,
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) -> (NodeAddressBytes, SphinxPacket) {
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let destination = Destination::new(our_address, surb_id);
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encapsulate_message(destination, LOOP_COVER_MESSAGE_PAYLOAD.to_vec(), topology)
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}
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pub fn encapsulate_message(
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recipient: Destination,
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message: Vec<u8>,
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topology: &Topology,
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) -> (NodeAddressBytes, SphinxPacket) {
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let mixes_route = topology::route_from(&topology, 1);
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let first_provider = topology.mix_provider_nodes.first().unwrap();
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let decoded_key_bytes =
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base64::decode_config(&first_provider.pub_key, base64::URL_SAFE).unwrap();
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let key_bytes = bytes::zero_pad_to_32(decoded_key_bytes);
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let key = MontgomeryPoint(key_bytes);
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let provider = Node::new(
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topology::socket_bytes_from_string(first_provider.host.clone()),
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key,
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);
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let route = [mixes_route, vec![provider]].concat();
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let delays = sphinx::header::delays::generate(route.len());
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// build the packet
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let packet = sphinx::SphinxPacket::new(message, &route[..], &recipient, &delays).unwrap();
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let first_node_address = route.first().unwrap().address;
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(first_node_address, packet)
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}
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