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solana-with-rpc-optimizations
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derive ElGamal keypair from Ed25519 keypair instead of just the signing key

This commit is contained in:
Sam Kim 2021-10-20 09:34:41 -04:00 committed by Michael Vines
parent defdf8da72
commit 89ddae29ef
1 changed files with 8 additions and 7 deletions
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15
zk-token-sdk/src/encryption/elgamal.rs
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@ -11,7 +11,7 @@ use {
ristretto::{CompressedRistretto, RistrettoPoint},
scalar::Scalar,
},
ed25519_dalek::SecretKey as SigningKey,
ed25519_dalek::Keypair as SigningKeyPair,
serde::{Deserialize, Serialize},
solana_sdk::pubkey::Pubkey,
std::collections::HashMap,
@ -136,8 +136,8 @@ impl ElGamalKeypair {
/// address.
#[cfg(not(target_arch = "bpf"))]
#[allow(non_snake_case)]
pub fn new(signing_key: &SigningKey, address: &Pubkey) -> Self {
let secret = ElGamalSecretKey::new(signing_key, address);
pub fn new(signing_key_pair: &SigningKeyPair, address: &Pubkey) -> Self {
let secret = ElGamalSecretKey::new(signing_key_pair, address);
let public = ElGamalPubkey::new(&secret);
Self { public, secret }
@ -292,10 +292,11 @@ impl fmt::Display for ElGamalPubkey {
#[zeroize(drop)]
pub struct ElGamalSecretKey(Scalar);
impl ElGamalSecretKey {
pub fn new(signing_key: &SigningKey, address: &Pubkey) -> Self {
let mut hashable = [0_u8; 64];
hashable[..32].copy_from_slice(&signing_key.to_bytes());
hashable[32..].copy_from_slice(&address.to_bytes());
pub fn new(signing_key_pair: &SigningKeyPair, address: &Pubkey) -> Self {
let mut hashable = [0_u8; 96];
hashable[..32].copy_from_slice(&signing_key_pair.secret.to_bytes());
hashable[32..64].copy_from_slice(&signing_key_pair.public.to_bytes());
hashable[64..].copy_from_slice(&address.to_bytes());
ElGamalSecretKey(Scalar::hash_from_bytes::<Sha3_512>(&hashable))
}