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/// Threshold authentication requiring t-of-n signatures
/// NOTE: saorsa-seal 0.1.1 doesn't export the expected types (ThresholdVerifier, ShareSignature, PublicKeyShare)
/// This is a placeholder implementation until the proper types are available
#[derive(Debug, Clone)]
pub struct ThresholdWriteAuth {
threshold: usize,
total: usize,
pub_keys: Vec<PubKey>,
}
impl ThresholdWriteAuth {
/// Create a new threshold auth with public keys
pub fn new(threshold: usize, total: usize, pub_keys: Vec<PubKey>) -> Result<Self> {
if threshold > total {
anyhow::bail!("Threshold cannot exceed total");
}
if threshold == 0 {
anyhow::bail!("Threshold must be at least 1");
}
if pub_keys.len() != total {
anyhow::bail!("Public keys count must equal total");
}
Ok(Self {
threshold,
total,
pub_keys,
})
}
/// Create from public keys with validation
pub fn from_pub_keys(threshold: usize, total: usize, pub_keys: Vec<PubKey>) -> Result<Self> {
Self::new(threshold, total, pub_keys)
}
/// Get the threshold value
pub fn threshold(&self) -> usize {
self.threshold
}
/// Get the total number of keys
pub fn total(&self) -> usize {
self.total
}
/// Get the public keys
pub fn pub_keys(&self) -> &[PubKey] {
&self.pub_keys
}
}
#[async_trait]
impl WriteAuth for ThresholdWriteAuth {
async fn verify(&self, _record: &[u8], sigs: &[Sig]) -> Result<bool> {
// Verify we have at least threshold signatures
if sigs.len() < self.threshold {
return Ok(false);
}
// Validate against total possible signatures
if sigs.len() > self.total {
return Ok(false);
}
// TODO: Implement actual threshold signature verification once saorsa-seal exports proper types
// For now, this is a placeholder that validates against pub_keys length
// In production, this would use proper threshold cryptography with self.pub_keys
Ok(sigs.len() >= self.threshold && self.pub_keys.len() == self.total)
}
}