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tests.rs
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tests.rs
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// Copyright 2020 MaidSafe.net limited.
//
// This SAFE Network Software is licensed to you under the MIT license <LICENSE-MIT
// https://opensource.org/licenses/MIT> or the Modified BSD license <LICENSE-BSD
// https://opensource.org/licenses/BSD-3-Clause>, at your option. This file may not be copied,
// modified, or distributed except according to those terms. Please review the Licences for the
// specific language governing permissions and limitations relating to use of the SAFE Network
// Software.
use crate::dev_utils::{create_ids, PeerId};
use crate::key_gen::{message::Message, Error, KeyGen, MessageAndTarget};
use anyhow::{format_err, Result};
use bincode::serialize;
use blsttc::{PublicKeySet, SignatureShare};
use itertools::Itertools;
use rand::{Rng, RngCore};
use std::collections::{BTreeMap, BTreeSet};
use std::convert::TryInto;
use std::fmt::Debug;
use std::ops::Neg;
use xor_name::XorName;
use bls12_381::G1Affine;
use bls12_381::G2Affine;
use bls_like::PublicKeyAffine;
use serde::Serialize;
// Alter the configure of the number of nodes and the threshold.
const NODENUM: usize = 5;
const THRESHOLD: usize = 3;
fn setup_generators<R: RngCore>(
mut rng: &mut R,
non_responsives: BTreeSet<u64>,
) -> Result<(Vec<PeerId>, Vec<KeyGen>)> {
// Generate individual ids.
let peer_ids: Vec<PeerId> = create_ids(NODENUM);
Ok((
peer_ids.clone(),
create_generators(&mut rng, non_responsives, &peer_ids, THRESHOLD)?,
))
}
fn create_generators<R: RngCore>(
mut rng: &mut R,
non_responsives: BTreeSet<u64>,
peer_ids: &[PeerId],
threshold: usize,
) -> Result<Vec<KeyGen>> {
// Generate individual key pairs.
let names: BTreeSet<XorName> = peer_ids.iter().map(|peer_id| peer_id.name()).collect();
// Create the `KeyGen` instances
let mut generators = Vec::new();
let mut proposals = Vec::new();
for peer_id in peer_ids.iter() {
let key_gen = {
let (key_gen, messaging) =
match KeyGen::initialize(peer_id.name(), threshold, names.clone()) {
Ok(result) => result,
Err(err) => {
return Err(format_err!(
"Failed to initialize KeyGen of {:?} {:?}",
&peer_id,
err
))
}
};
proposals.extend(messaging);
key_gen
};
generators.push(key_gen);
}
messaging(&mut rng, &mut generators, &mut proposals, non_responsives);
Ok(generators)
}
fn messaging<R: RngCore>(
mut rng: &mut R,
generators: &mut Vec<KeyGen>,
proposals: &mut Vec<MessageAndTarget>,
non_responsives: BTreeSet<u64>,
) {
// Simulating the AE pattern
let mut cached_msg = BTreeMap::<XorName, Message>::new();
// Keep broadcasting the proposals among the generators till no more.
// The proposal from non_responsive nodes shall be ignored.
while !proposals.is_empty() {
let proposals_local = std::mem::take(proposals);
for (receiver, proposal) in &proposals_local {
match proposal {
Message::Initialization { .. } | Message::Proposal { .. } => {
let _ = cached_msg.insert(proposal.id(), proposal.clone());
}
_ => {}
}
for (index, generator) in generators.iter_mut().enumerate() {
if receiver == &generator.our_id {
let messaging_vec = if let Ok(messaging_vec) =
generator.handle_message(&mut rng, proposal.clone())
{
messaging_vec
} else {
let mut messages: Vec<Message> = cached_msg.values().cloned().collect();
messages.push(proposal.clone());
let (messaging_vec, _unhandable) =
generator.handle_pre_session_messages(&mut rng, messages);
messaging_vec
};
if !non_responsives.contains(&(index as u64)) {
messaging_vec
.iter()
.for_each(|prop| proposals.push(prop.clone()));
}
}
}
}
}
}
#[test]
fn all_nodes_being_responsive() -> Result<()> {
let mut rng = rand::thread_rng();
let (_, mut generators) = setup_generators(&mut rng, BTreeSet::new())?;
// With all participants responding properly, the key generating procedure shall be completed
// automatically. As when there is no complaint, Justification phase will be triggered directly.
assert!(generators
.iter_mut()
.all(|key_gen| key_gen.generate_keys().is_some()));
Ok(())
}
#[test]
fn having_max_unresponsive_nodes_still_work() -> Result<()> {
let mut rng = rand::thread_rng();
let all_nodes: BTreeSet<_> = (0u64..NODENUM as u64).collect();
let combinations_of_non_resp = all_nodes
.iter()
.cloned()
.combinations(NODENUM - THRESHOLD - 1);
for non_responsive in combinations_of_non_resp {
let non_responsives: BTreeSet<u64> = non_responsive.iter().cloned().collect();
let (peer_ids, mut generators) = setup_generators(&mut rng, non_responsives.clone())?;
let mut proposals = Vec::new();
// With one non_responsive node, Proposal phase cannot be completed automatically. This
// requires finalize_contributing_phase to be called externally to complete the procedure.
// All participants will transit into Complaint phase afterwards, Then requires
// finalize_complaining_phase to be called externally to complete the procedure.
for _ in 0..2 {
peer_ids.iter().enumerate().for_each(|(index, _peer_id)| {
if let Ok(proposal_vec) = generators[index].timed_phase_transition(&mut rng) {
if !non_responsives.contains(&(index as u64)) {
for proposal in proposal_vec {
proposals.push(proposal);
}
}
}
});
// Continue the procedure with messaging.
messaging(
&mut rng,
&mut generators,
&mut proposals,
non_responsives.clone(),
);
assert!(proposals.is_empty());
}
let responsive = all_nodes
.difference(&non_responsives)
.cloned()
.collect_vec();
let pub_key_set: PublicKeySet = generators[responsive[0] as usize]
.generate_keys()
.expect("Failed to generate `PublicKeySet` for node #0")
.1
.public_key_set;
let msg = "Test message!";
let mut sig_shares: BTreeMap<usize, SignatureShare> = BTreeMap::new();
for (index, key_gen) in generators.iter_mut().enumerate() {
if !non_responsives.contains(&(index as u64)) {
let outcome = if let Some(outcome) = key_gen.generate_keys() {
outcome.1
} else {
return Err(format_err!(
"Failed to generate `PublicKeySet` and `SecretKeyShare` for node #{}",
index
));
};
let sk = outcome.secret_key_share;
let index = key_gen.our_index as usize;
let pks = outcome.public_key_set;
assert_eq!(pks, pub_key_set);
let sig = sk.sign(msg);
assert!(pks.public_key_share(index).verify(&sig, msg));
let _ = sig_shares.insert(index, sig);
non_responsives.iter().for_each(|idx| {
assert!(!key_gen.names().contains(&peer_ids[*idx as usize].name()))
});
} else {
assert!(key_gen.generate_keys().is_none());
};
}
let sig = match pub_key_set.combine_signatures(sig_shares.iter()) {
Ok(sig) => sig,
Err(e) => return Err(format_err!("Unexpected Error {:?}: Not able to generate Signature with THRESHOLD + 1 sig_shares", e)),
};
assert!(pub_key_set.public_key().verify(&sig, msg));
}
Ok(())
}
#[test]
fn having_min_unresponsive_nodes_cause_block() -> Result<()> {
let mut rng = rand::thread_rng();
let mut non_responsives = BTreeSet::<u64>::new();
for i in 0..(NODENUM - THRESHOLD) as u64 {
let _ = non_responsives.insert(i);
}
let (peer_ids, mut generators) = setup_generators(&mut rng, non_responsives.clone())?;
// The `messaging` function only ignores the non-initial proposals from a non-responsive node.
// i.e. the Initialization phase will be completed and transits into Proposal.
// With more non-responsive nodes, `finalize_contributing_phase` returns with Complaints of
// non-contributors, and trigger the transition into Complaint phase. However, the Complaint
// phase will be blocked as cannot collect more than threshold votes.
// And the phase shall be blocked at Proposal.
let mut proposals = Vec::new();
// Trigger `finalize_contributing_phase` first, and exchange complaints
peer_ids.iter().enumerate().for_each(|(index, _peer_id)| {
if let Ok(proposal_vec) = generators[index].timed_phase_transition(&mut rng) {
if !non_responsives.contains(&(index as u64)) {
for proposal in proposal_vec {
proposals.push(proposal);
}
}
}
});
messaging(
&mut rng,
&mut generators,
&mut proposals,
non_responsives.clone(),
);
// Then trigger `finalize_complaining_phase`, phase shall be blocked due to too many non-voters.
for (index, peer_id) in peer_ids.iter().enumerate() {
if let Err(err) = generators[index].timed_phase_transition(&mut rng) {
assert_eq!(err, Error::TooManyNonVoters(non_responsives.clone()));
} else {
return Err(format_err!(
"Node {:?}-{:?} shall not progress anymore",
index,
peer_id
));
}
}
// List already returned within the above call to `finalize_complaining_phase`. So here it
// returns an empty list.
generators
.iter()
.for_each(|generator| assert!(generator.possible_blockers().is_empty()));
Ok(())
}
#[test]
fn threshold_signature() -> Result<()> {
let mut rng = rand::thread_rng();
let (_, generators) = setup_generators(&mut rng, BTreeSet::new())?;
// Compute the keys and threshold signature shares.
let msg = "0";
let pub_key_set = generators[0]
.generate_keys()
.expect("Failed to generate `PublicKeySet` for node #0")
.1
.public_key_set;
let mut sig_shares = BTreeMap::new();
for (idx, generator) in generators.iter().enumerate() {
assert!(generator.is_ready());
let outcome = if let Some(outcome) = generator.generate_keys() {
outcome.1
} else {
return Err(format_err!(
"Failed to generate `PublicKeySet` and `SecretKeyShare` for node #{}",
idx
));
};
let sk = outcome.secret_key_share;
let pks = outcome.public_key_set;
assert_eq!(pks, pub_key_set);
let sig = sk.sign(msg);
let bytes_pk = &pks.public_key().to_bytes();
let bytes_sig = &sig.to_bytes();
// let test = G1Affine::from_compressed(&bytes_pk).unwrap();
// let test_2 = G2Affine::from_compressed(&bytes_sig).unwrap();
// println!("\nPublic_key::Affine {:?}", test);
// println!("Signature::Affine {:?}", test_2);
println!("::::::::{:?}", hex::encode(bytes_pk));
println!("::::::::{:?}", hex::encode(bytes_sig));
assert!(pks.public_key_share(idx).verify(&sig, msg));
let _ = sig_shares.insert(idx, sig);
}
// Test threshold signature verification for a combination of signatures
let sig_combinations = sig_shares.iter().combinations(THRESHOLD + 1);
let deficient_sig_combinations = sig_shares.iter().combinations(THRESHOLD);
for combination in deficient_sig_combinations.clone() {
match pub_key_set.combine_signatures(combination) {
Ok(_) => {
return Err(format_err!(
"Unexpected Success: Signatures cannot be aggregated with THRESHOLD shares"
));
}
Err(e) => assert_eq!(format!("{:?}", e), "NotEnoughShares".to_string()),
}
}
for combination in sig_combinations.clone() {
let sig = pub_key_set
.combine_signatures(combination)
.expect("signature shares match");
assert!(pub_key_set.public_key().verify(&sig, msg));
}
// Test signatures aggregated from a combination of different share - should be the same
for signature_shares in sig_combinations.collect_vec().windows(2) {
let sig = pub_key_set
.combine_signatures(signature_shares[0].clone())
.expect("signature shares match");
let sig_ser = if let Ok(sig_ser) = serialize(&sig) {
sig_ser
} else {
return Err(format_err!("cannot serialize signature 1"));
};
let sig2 = pub_key_set
.combine_signatures(signature_shares[1].clone())
.expect("signature shares match");
let sig2_ser = if let Ok(sig_ser) = serialize(&sig2) {
sig_ser
} else {
return Err(format_err!("cannot serialize signature 2"));
};
assert_eq!(sig_ser, sig2_ser);
}
Ok(())
}
#[test]
fn threshold_encrypt() -> Result<()> {
let mut rng = rand::thread_rng();
let (_, generators) = setup_generators(&mut rng, BTreeSet::new())?;
// Compute the keys and decryption shares.
let msg = "Help for threshold encryption unit test!".as_bytes();
let pub_key_set = generators[0]
.generate_keys()
.expect("Failed to generate `PublicKeySet` for node #0")
.1
.public_key_set;
let ciphertext = pub_key_set.public_key().encrypt(msg);
let mut dec_shares = BTreeMap::new();
for (idx, generator) in generators.iter().enumerate() {
assert!(generator.is_ready());
let outcome = if let Some(outcome) = generator.generate_keys() {
outcome.1
} else {
return Err(format_err!(
"Failed to generate `PublicKeySet` and `SecretKeyShare` for node #{}",
idx
));
};
let sk = outcome.secret_key_share;
let pks = outcome.public_key_set;
assert_eq!(pks, pub_key_set);
let dec_share = if let Some(dec_share) = sk.decrypt_share(&ciphertext) {
dec_share
} else {
return Err(format_err!("Cannot create a decrypt share."));
};
assert!(pks
.public_key_share(idx)
.verify_decryption_share(&dec_share, &ciphertext));
let _ = dec_shares.insert(idx, dec_share);
}
// Test threshold encryption verification for a combination of shares - should pass as there
// are THRESHOLD + 1 shares aggregated in each combination
let dec_share_combinations = dec_shares.iter().combinations(THRESHOLD + 1);
for dec_share in dec_share_combinations {
let decrypted = if let Ok(decrypted) = pub_key_set.decrypt(dec_share, &ciphertext) {
decrypted
} else {
return Err(format_err!("Cannot verify a decrypt share."));
};
assert_eq!(msg, decrypted.as_slice());
}
// Test threshold decryption for a combination of shares - shouldn't decrypt as there
// are THRESHOLD shares in each combination which are not enough to aggregate
let deficient_dec_share_combinations = dec_shares.iter().combinations(THRESHOLD);
for deficient_dec_share in deficient_dec_share_combinations {
match pub_key_set.decrypt(deficient_dec_share, &ciphertext) {
Ok(_) => {
return Err(format_err!(
"Unexpected Success: Cannot decrypt by aggregating THRESHOLD shares"
))
}
Err(e) => assert_eq!(format!("{:?}", e), "NotEnoughShares".to_string()),
}
}
Ok(())
}
#[test]
fn network_churning() -> Result<()> {
let mut rng = rand::thread_rng();
let initial_num = 3;
let mut peer_ids = create_ids(initial_num);
let mut naming_index = initial_num;
while naming_index < 15 {
if peer_ids.len() < NODENUM || rng.gen() {
peer_ids.push(PeerId::new());
naming_index += 1;
} else {
let _ = peer_ids.remove(rng.gen_range(0, peer_ids.len()));
}
let threshold: usize = peer_ids.len() * 2 / 3;
let mut generators = create_generators(&mut rng, BTreeSet::new(), &peer_ids, threshold)?;
assert!(generators
.iter_mut()
.all(|key_gen| key_gen.generate_keys().is_some()));
}
Ok(())
}