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//! Collection of benchmarking utilities for the `crypto` module.
use crate::crypto::handshake::ShakeKeyGenerator as KGen;
use crate::Result;
use cipher::{KeyIvInit, StreamCipher};
use digest::Digest;
use tor_bytes::SecretBuf;
use tor_cell::relaycell::RelayCellFormatTrait;
pub use super::cell::tor1::bench_utils::*;
use super::cell::{
tor1::CryptStatePair, ClientLayer, CryptInit, InboundClientCrypt, OutboundClientCrypt,
RelayCrypt,
};
/// Public wrapper around the `CryptStatePair` struct.
#[repr(transparent)]
pub struct HopCryptState<SC: StreamCipher, D: Digest + Clone, RCF: RelayCellFormatTrait>(
CryptStatePair<SC, D, RCF>,
);
/// Public wrapper around the `InboundClientCrypt` struct.
#[repr(transparent)]
pub struct InboundCryptWrapper(InboundClientCrypt);
/// Public wrapper around the `OutboundClientCrypt` struct.
#[repr(transparent)]
pub struct OutboundCryptWrapper(OutboundClientCrypt);
impl<SC: StreamCipher + KeyIvInit, D: Digest + Clone, RCF: RelayCellFormatTrait>
HopCryptState<SC, D, RCF>
{
/// Return a new `HopCryptState` based on a seed.
pub fn construct(seed: SecretBuf) -> Result<Self> {
Ok(Self(CryptStatePair::construct(KGen::new(seed))?))
}
}
impl InboundCryptWrapper {
/// Create a new `InboundClientCryptState`.
pub fn new() -> Self {
Default::default()
}
/// Add a new layer to the `InboundClientCrypt` based on a seed.
pub fn add_layer_from_seed<
SC: StreamCipher + KeyIvInit + Send + 'static,
D: Digest + Clone + Send + 'static,
RCF: RelayCellFormatTrait + Send + 'static,
>(
&mut self,
seed: SecretBuf,
) -> Result<()> {
let layer: CryptStatePair<SC, D, RCF> = CryptStatePair::construct(KGen::new(seed))?;
let (_outbound, inbound, _binding) = layer.split();
self.0.add_layer(Box::new(inbound));
Ok(())
}
}
impl Default for InboundCryptWrapper {
fn default() -> Self {
Self(InboundClientCrypt::new())
}
}
impl OutboundCryptWrapper {
/// Create a new `OutboundClientCryptState`.
pub fn new() -> Self {
Default::default()
}
/// Add a new layer to the `OutboundClientCrypt` based on a seed.
pub fn add_layer_from_seed<
SC: StreamCipher + KeyIvInit + Send + 'static,
D: Digest + Clone + Send + 'static,
RCF: RelayCellFormatTrait + Send + 'static,
>(
&mut self,
seed: SecretBuf,
) -> Result<()> {
let layer: CryptStatePair<SC, D, RCF> = CryptStatePair::construct(KGen::new(seed))?;
let (outbound, _inbound, _binding) = layer.split();
self.0.add_layer(Box::new(outbound));
Ok(())
}
}
impl Default for OutboundCryptWrapper {
fn default() -> Self {
Self(OutboundClientCrypt::new())
}
}
/// Encrypts the given `RelayCell` in the inbound direction.
pub fn encrypt_inbound<SC: StreamCipher, D: Digest + Clone, RCF: RelayCellFormatTrait>(
cell: &mut RelayBody,
router_states: &mut [HopCryptState<SC, D, RCF>],
) {
let cell = &mut cell.0;
for (i, pair) in router_states.iter_mut().rev().enumerate() {
let pair = &mut pair.0;
if i == 0 {
pair.originate(cell);
}
pair.encrypt_inbound(cell);
}
}
/// Public wrapper around the `InboundClientCrypt::decrypt` method
/// for benchmarking purposes.
pub fn client_decrypt(cell: &mut RelayBody, cc_in: &mut InboundCryptWrapper) -> Result<()> {
let cell = &mut cell.0;
cc_in.0.decrypt(cell)?;
Ok(())
}
/// Public wrapper around the `OutboundClientCrypt::encrypt` method
/// for benchmarking purposes.
pub fn client_encrypt(
cell: &mut RelayBody,
cc_out: &mut OutboundCryptWrapper,
hop_num: u8,
) -> Result<()> {
let cell = &mut cell.0;
cc_out.0.encrypt(cell, hop_num.into())?;
Ok(())
}
|
