Added clear-on-drop secret-keys to 'NetworkInfo'.
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34d642f709
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20
mod.rs
20
mod.rs
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@ -8,6 +8,7 @@ use std::fmt;
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use std::hash::{Hash, Hasher};
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use byteorder::{BigEndian, ByteOrder};
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use clear_on_drop::ClearOnDrop;
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use init_with::InitWith;
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use pairing::{CurveAffine, CurveProjective, Engine, Field, PrimeField};
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use rand::{ChaChaRng, OsRng, Rng, SeedableRng};
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@ -119,6 +120,12 @@ impl<E: Engine> PartialEq for SecretKey<E> {
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}
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}
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impl<E: Engine> Default for SecretKey<E> {
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fn default() -> Self {
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SecretKey(E::Fr::zero())
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}
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}
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impl<E: Engine> SecretKey<E> {
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/// Creates a new secret key.
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pub fn new<R: Rng>(rng: &mut R) -> Self {
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@ -290,8 +297,13 @@ impl<E: Engine> SecretKeySet<E> {
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}
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/// Returns the `i`-th secret key share.
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pub fn secret_key_share<T: Into<<E::Fr as PrimeField>::Repr>>(&self, i: T) -> SecretKey<E> {
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pub fn secret_key_share<T>(&self, i: T) -> ClearOnDrop<Box<SecretKey<E>>>
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where
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T: Into<<E::Fr as PrimeField>::Repr>
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{
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ClearOnDrop::new(Box::new(
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SecretKey(self.poly.evaluate(from_repr_plus_1::<E::Fr>(i.into())))
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))
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}
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/// Returns the corresponding public key set. That information can be shared publicly.
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@ -423,9 +435,9 @@ mod tests {
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assert_ne!(pk_set.public_key(), pk_set.public_key_share(2));
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// Make sure we don't hand out the main secret key to anyone.
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assert_ne!(sk_set.secret_key(), sk_set.secret_key_share(0));
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assert_ne!(sk_set.secret_key(), sk_set.secret_key_share(1));
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assert_ne!(sk_set.secret_key(), sk_set.secret_key_share(2));
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assert_ne!(sk_set.secret_key(), *sk_set.secret_key_share(0));
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assert_ne!(sk_set.secret_key(), *sk_set.secret_key_share(1));
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assert_ne!(sk_set.secret_key(), *sk_set.secret_key_share(2));
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let msg = "Totally real news";
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