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SecretStore: threshold decrease PoC (#7562)

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Svyatoslav Nikolsky 2018-01-16 14:58:41 +03:00 committed by Marek Kotewicz
parent 594716dc1e
commit 04b571b742
1 changed files with 24 additions and 0 deletions
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24
secret_store/src/key_server_cluster/math.rs
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@ -727,4 +727,28 @@ pub mod tests {
assert_eq!(joint_secret1, joint_secret3);
}
}
#[test]
fn full_generation_math_session_with_decreasing_threshold() {
let (t, n) = (3, 5);
// generate key using t-of-n session
let artifacts1 = run_key_generation(t, n, None);
let joint_secret1 = compute_joint_secret(artifacts1.polynoms1.iter().map(|p1| &p1[0])).unwrap();
// let's say we want to decrease threshold so that it becames (t-1)-of-n
let new_t = t - 1;
let artifacts2 = run_key_share_refreshing(t, new_t, n, &artifacts1);
let joint_secret2 = compute_joint_secret_from_shares(new_t, &artifacts2.secret_shares.iter().take(new_t + 1).collect::<Vec<_>>(),
&artifacts2.id_numbers.iter().take(new_t + 1).collect::<Vec<_>>()).unwrap();
assert_eq!(joint_secret1, joint_secret2);
// let's say we want to decrease threshold once again so that it becames (t-2)-of-n
let t = t - 1;
let new_t = t - 2;
let artifacts3 = run_key_share_refreshing(t, new_t, n, &artifacts2);
let joint_secret3 = compute_joint_secret_from_shares(new_t, &artifacts3.secret_shares.iter().take(new_t + 1).collect::<Vec<_>>(),
&artifacts3.id_numbers.iter().take(new_t + 1).collect::<Vec<_>>()).unwrap();
assert_eq!(joint_secret1, joint_secret3);
}
}