mirror of https://github.com/poanetwork/hbbft.git
90 lines
3.0 KiB
Rust
90 lines
3.0 KiB
Rust
//! Tests for synchronous distributed key generation.
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extern crate env_logger;
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extern crate hbbft;
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extern crate pairing;
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extern crate rand;
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use std::collections::BTreeMap;
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use hbbft::crypto::{PublicKey, SecretKey};
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use hbbft::sync_key_gen::SyncKeyGen;
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fn test_sync_key_gen_with(threshold: usize, node_num: usize) {
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let mut rng = rand::thread_rng();
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// Generate individual key pairs for encryption. These are not suitable for threshold schemes.
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let sec_keys: Vec<SecretKey> = (0..node_num).map(|_| SecretKey::new(&mut rng)).collect();
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let pub_keys: BTreeMap<usize, PublicKey> = sec_keys
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.iter()
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.map(|sk| sk.public_key())
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.enumerate()
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.collect();
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// Create the `SyncKeyGen` instances and initial proposals.
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let mut nodes = Vec::new();
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let proposals: Vec<_> = sec_keys
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.into_iter()
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.enumerate()
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.map(|(id, sk)| {
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let (sync_key_gen, proposal) = SyncKeyGen::new(&id, sk, pub_keys.clone(), threshold);
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nodes.push(sync_key_gen);
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proposal
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})
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.collect();
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// Handle the first `threshold + 1` proposals. Those should suffice for key generation.
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let mut accepts = Vec::new();
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for (sender_id, proposal) in proposals[..=threshold].iter().enumerate() {
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for (node_id, node) in nodes.iter_mut().enumerate() {
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let accept = node
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.handle_propose(&sender_id, proposal.clone().expect("proposal"))
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.expect("valid proposal");
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// Only the first `threshold + 1` manage to commit their `Accept`s.
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if node_id <= 2 * threshold {
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accepts.push((node_id, accept));
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}
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}
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}
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// Handle the `Accept`s from `2 * threshold + 1` nodes.
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for (sender_id, accept) in accepts {
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for node in &mut nodes {
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assert!(!node.is_ready()); // Not enough `Accept`s yet.
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node.handle_accept(&sender_id, accept.clone());
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}
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}
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// Compute the keys and test a threshold signature.
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let msg = "Help I'm trapped in a unit test factory";
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let pub_key_set = nodes[0].generate().0;
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let sig_shares: BTreeMap<_, _> = nodes
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.iter()
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.enumerate()
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.map(|(idx, node)| {
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assert!(node.is_ready());
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let (pks, opt_sk) = node.generate();
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let sk = opt_sk.expect("new secret key");
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assert_eq!(pks, pub_key_set);
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let sig = sk.sign(msg);
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assert!(pks.public_key_share(idx as u64).verify(&sig, msg));
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(idx as u64, sig)
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})
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.collect();
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let sig = pub_key_set
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.combine_signatures(sig_shares.iter().take(threshold + 1))
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.expect("signature shares match");
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assert!(pub_key_set.public_key().verify(&sig, msg));
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}
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#[test]
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fn test_sync_key_gen() {
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// This returns an error in all but the first test.
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let _ = env_logger::try_init();
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for &node_num in &[1, 2, 3, 4, 8, 15] {
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let threshold = (node_num - 1) / 3;
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test_sync_key_gen_with(threshold, node_num);
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}
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}
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