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// SPDX-License-Identifier: MPL-2.0
use crate::{
codec::{Encode, ParameterizedDecode},
flp::Type,
vdaf::{
prg::Prg,
prio3::{Prio3, Prio3InputShare, Prio3PrepareShare},
Aggregator, PrepareTransition,
},
};
use serde::{Deserialize, Serialize};
use std::{convert::TryInto, fmt::Debug};
#[derive(Debug, Deserialize, Serialize)]
struct TEncoded(#[serde(with = "hex")] Vec<u8>);
impl AsRef<[u8]> for TEncoded {
fn as_ref(&self) -> &[u8] {
&self.0
}
}
#[derive(Deserialize, Serialize)]
struct TPrio3Prep<M> {
measurement: M,
#[serde(with = "hex")]
nonce: Vec<u8>,
input_shares: Vec<TEncoded>,
prep_shares: Vec<Vec<TEncoded>>,
prep_messages: Vec<TEncoded>,
out_shares: Vec<Vec<M>>,
}
#[derive(Deserialize, Serialize)]
struct TPrio3<M> {
verify_key: TEncoded,
prep: Vec<TPrio3Prep<M>>,
}
macro_rules! err {
(
$test_num:ident,
$error:expr,
$msg:expr
) => {
panic!("test #{} failed: {} err: {}", $test_num, $msg, $error)
};
}
// TODO Generalize this method to work with any VDAF. To do so we would need to add
// `test_vec_setup()` and `test_vec_shard()` to traits. (There may be a less invasive alternative.)
fn check_prep_test_vec<M, T, P, const L: usize>(
prio3: &Prio3<T, P, L>,
verify_key: &[u8; L],
test_num: usize,
t: &TPrio3Prep<M>,
) where
T: Type<Measurement = M>,
P: Prg<L>,
M: From<<T as Type>::Field> + Debug + PartialEq,
{
let input_shares = prio3
.test_vec_shard(&t.measurement)
.expect("failed to generate input shares");
assert_eq!(2, t.input_shares.len(), "#{}", test_num);
for (agg_id, want) in t.input_shares.iter().enumerate() {
assert_eq!(
input_shares[agg_id],
Prio3InputShare::get_decoded_with_param(&(prio3, agg_id), want.as_ref())
.unwrap_or_else(|e| err!(test_num, e, "decode test vector (input share)")),
"#{}",
test_num
);
assert_eq!(
input_shares[agg_id].get_encoded(),
want.as_ref(),
"#{}",
test_num
)
}
let mut states = Vec::new();
let mut prep_shares = Vec::new();
for (agg_id, input_share) in input_shares.iter().enumerate() {
let (state, prep_share) = prio3
.prepare_init(verify_key, agg_id, &(), &t.nonce, &(), input_share)
.unwrap_or_else(|e| err!(test_num, e, "prep state init"));
states.push(state);
prep_shares.push(prep_share);
}
assert_eq!(1, t.prep_shares.len(), "#{}", test_num);
for (i, want) in t.prep_shares[0].iter().enumerate() {
assert_eq!(
prep_shares[i],
Prio3PrepareShare::get_decoded_with_param(&states[i], want.as_ref())
.unwrap_or_else(|e| err!(test_num, e, "decode test vector (prep share)")),
"#{}",
test_num
);
assert_eq!(prep_shares[i].get_encoded(), want.as_ref(), "#{}", test_num);
}
let inbound = prio3
.prepare_preprocess(prep_shares)
.unwrap_or_else(|e| err!(test_num, e, "prep preprocess"));
assert_eq!(t.prep_messages.len(), 1);
assert_eq!(inbound.get_encoded(), t.prep_messages[0].as_ref());
let mut out_shares = Vec::new();
for state in states.iter_mut() {
match prio3.prepare_step(state.clone(), inbound.clone()).unwrap() {
PrepareTransition::Finish(out_share) => {
out_shares.push(out_share);
}
_ => panic!("unexpected transition"),
}
}
for (got, want) in out_shares.iter().zip(t.out_shares.iter()) {
let got: Vec<M> = got.as_ref().iter().map(|x| M::from(*x)).collect();
assert_eq!(&got, want);
}
}
#[test]
fn test_vec_prio3_count() {
let t: TPrio3<u64> =
serde_json::from_str(include_str!("test_vec/03/Prio3Aes128Count_0.json")).unwrap();
let prio3 = Prio3::new_aes128_count(2).unwrap();
let verify_key = t.verify_key.as_ref().try_into().unwrap();
for (test_num, p) in t.prep.iter().enumerate() {
check_prep_test_vec(&prio3, &verify_key, test_num, p);
}
}
#[test]
fn test_vec_prio3_sum() {
let t: TPrio3<u128> =
serde_json::from_str(include_str!("test_vec/03/Prio3Aes128Sum_0.json")).unwrap();
let prio3 = Prio3::new_aes128_sum(2, 8).unwrap();
let verify_key = t.verify_key.as_ref().try_into().unwrap();
for (test_num, p) in t.prep.iter().enumerate() {
check_prep_test_vec(&prio3, &verify_key, test_num, p);
}
}
#[test]
fn test_vec_prio3_histogram() {
let t: TPrio3<u128> =
serde_json::from_str(include_str!("test_vec/03/Prio3Aes128Histogram_0.json")).unwrap();
let prio3 = Prio3::new_aes128_histogram(2, &[1, 10, 100]).unwrap();
let verify_key = t.verify_key.as_ref().try_into().unwrap();
for (test_num, p) in t.prep.iter().enumerate() {
check_prep_test_vec(&prio3, &verify_key, test_num, p);
}
}
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