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feat(server::crypto): add Shamir secret sharing utilities

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Wraps vsss_rs Gf256::split_array / combine_array into thin split_key /
combine_shares helpers. Also widens derive_key salt parameter from &[u8;16]
to &[u8] to accommodate the 32-byte share salts.
This commit is contained in:
CleverWild
2026-06-12 19:42:56 +02:00
parent 3e5f0cb3df
commit 50fe18d6ce
3 changed files with 38 additions and 10 deletions
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9
server/crates/arbiter-server/src/crypto/mod.rs
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@@ -1,5 +1,5 @@
use arbiter_crypto::safecell::{SafeCell, SafeCellHandle as _};
use encryption::v1::{Nonce, Salt};
use encryption::v1::Nonce;
use argon2::{Algorithm, Argon2};
use chacha20poly1305::{
@@ -13,6 +13,7 @@ use rand::{
pub mod encryption;
pub mod integrity;
pub mod shamir;
pub struct KeyCell(pub SafeCell<Key>);
impl From<SafeCell<Key>> for KeyCell {
@@ -94,7 +95,7 @@ impl KeyCell {
}
/// Derive a fixed-length key from the password using Argon2id, which is designed for password hashing and key derivation.
pub fn derive_key(password: &mut SafeCell<Vec<u8>>, salt: &Salt) -> KeyCell {
pub fn derive_key(password: &mut SafeCell<Vec<u8>>, salt: &[u8]) -> KeyCell {
let params = {
#[cfg(debug_assertions)]
{
@@ -132,10 +133,10 @@ mod tests {
#[test]
fn encrypt_decrypt() {
static PASSWORD: &[u8] = b"password";
let password = SafeCell::new(PASSWORD.to_vec());
let mut password = SafeCell::new(PASSWORD.to_vec());
let salt = generate_salt();
let mut key = derive_key(password, &salt);
let mut key = derive_key(&mut password, &salt);
let nonce = Nonce(*b"unique nonce 123 1231233"); // 24 bytes for XChaCha20Poly1305
let associated_data = b"associated data";
let mut buffer = b"secret data".to_vec();