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refactor: replace Ed25519 with Secp256k1 for default keypair generation

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This commit is contained in:
Sameh Abouel-saad 2025-06-02 15:59:17 +03:00
parent e00c140396
commit b0d0aaa53d
1 changed files with 18 additions and 12 deletions
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30
vault/src/lib.rs
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@ -217,7 +217,7 @@ impl<S: KVStore> Vault<S> {
// --- Keypair Management APIs ---
/// Create a default Ed25519 keypair for client identity
/// Create a default Secp256k1 keypair for client identity
/// This keypair is deterministically generated from the password and salt
/// and will always be the first keypair in the keyspace
async fn create_default_keypair(
@ -229,26 +229,32 @@ impl<S: KVStore> Vault<S> {
// 1. Derive a deterministic seed using standard PBKDF2
let seed = kdf::keyspace_key(password, salt);
// 2. Generate Ed25519 keypair from the seed
use ed25519_dalek::{SigningKey, VerifyingKey};
// 2. Generate Secp256k1 keypair from the seed
use k256::ecdsa::{SigningKey, VerifyingKey, signature::hazmat::PrehashSigner};
// Use the seed to create a deterministic keypair
let signing = SigningKey::from_bytes(seed.as_slice().try_into().unwrap());
let verifying: VerifyingKey = (&signing).into();
// Use the seed as the private key directly (32 bytes)
let mut secret_key_bytes = [0u8; 32];
secret_key_bytes.copy_from_slice(&seed[..32]);
let priv_bytes = signing.to_bytes().to_vec();
let pub_bytes = verifying.to_bytes().to_vec();
// Create signing key
let signing_key = SigningKey::from_bytes(&secret_key_bytes.into())
.map_err(|e| VaultError::Crypto(format!("Failed to create signing key: {}", e)))?;
// Create an ID for the default keypair
// Get verifying key
let verifying_key = VerifyingKey::from(&signing_key);
// Convert keys to bytes
let priv_bytes = signing_key.to_bytes().to_vec();
let pub_bytes = verifying_key.to_encoded_point(false).as_bytes().to_vec();
let id = hex::encode(&pub_bytes);
// 3. Unlock the keyspace to get its data
// 3. Unlock keyspace to add the keypair
let mut data = self.unlock_keyspace(keyspace, password).await?;
// 4. Add to keypairs (as the first entry)
// 4. Create key entry
let entry = KeyEntry {
id: id.clone(),
key_type: KeyType::Ed25519,
key_type: KeyType::Secp256k1,
private_key: priv_bytes,
public_key: pub_bytes,
metadata: Some(KeyMetadata {