openethereum/secret_store/src/key_storage.rs

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// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
use std::path::PathBuf;
use util::Database;
use types::all::{Error, ServiceConfiguration, DocumentAddress, DocumentKey};
/// Document encryption keys storage
pub trait KeyStorage: Send + Sync {
/// Insert document encryption key
fn insert(&self, document: DocumentAddress, key: DocumentKey) -> Result<(), Error>;
/// Get document encryption key
fn get(&self, document: &DocumentAddress) -> Result<DocumentKey, Error>;
}
/// Persistent document encryption keys storage
pub struct PersistentKeyStorage {
db: Database,
}
impl PersistentKeyStorage {
/// Create new persistent document encryption keys storage
pub fn new(config: &ServiceConfiguration) -> Result<Self, Error> {
let mut db_path = PathBuf::from(&config.data_path);
db_path.push("db");
let db_path = db_path.to_str().ok_or(Error::Database("Invalid secretstore path".to_owned()))?;
Ok(PersistentKeyStorage {
db: Database::open_default(&db_path).map_err(Error::Database)?,
})
}
}
impl KeyStorage for PersistentKeyStorage {
fn insert(&self, document: DocumentAddress, key: DocumentKey) -> Result<(), Error> {
let mut batch = self.db.transaction();
batch.put(None, &document, &key);
self.db.write(batch).map_err(Error::Database)
}
fn get(&self, document: &DocumentAddress) -> Result<DocumentKey, Error> {
self.db.get(None, document)
.map_err(Error::Database)?
.ok_or(Error::DocumentNotFound)
.map(|key| key.to_vec())
}
}
#[cfg(test)]
pub mod tests {
use std::collections::HashMap;
use parking_lot::RwLock;
use devtools::RandomTempPath;
use super::super::types::all::{Error, ServiceConfiguration, DocumentAddress, DocumentKey};
use super::{KeyStorage, PersistentKeyStorage};
#[derive(Default)]
/// In-memory document encryption keys storage
pub struct DummyKeyStorage {
keys: RwLock<HashMap<DocumentAddress, DocumentKey>>,
}
impl KeyStorage for DummyKeyStorage {
fn insert(&self, document: DocumentAddress, key: DocumentKey) -> Result<(), Error> {
self.keys.write().insert(document, key);
Ok(())
}
fn get(&self, document: &DocumentAddress) -> Result<DocumentKey, Error> {
self.keys.read().get(document).cloned().ok_or(Error::DocumentNotFound)
}
}
#[test]
fn persistent_key_storage() {
let path = RandomTempPath::create_dir();
let config = ServiceConfiguration {
listener_addr: "0.0.0.0".to_owned(),
listener_port: 8082,
data_path: path.as_str().to_owned(),
};
let key1 = DocumentAddress::from(1);
let value1: DocumentKey = vec![0x77, 0x88];
let key2 = DocumentAddress::from(2);
let value2: DocumentKey = vec![0x11, 0x22];
let key3 = DocumentAddress::from(3);
let key_storage = PersistentKeyStorage::new(&config).unwrap();
key_storage.insert(key1.clone(), value1.clone()).unwrap();
key_storage.insert(key2.clone(), value2.clone()).unwrap();
assert_eq!(key_storage.get(&key1), Ok(value1.clone()));
assert_eq!(key_storage.get(&key2), Ok(value2.clone()));
assert_eq!(key_storage.get(&key3), Err(Error::DocumentNotFound));
drop(key_storage);
let key_storage = PersistentKeyStorage::new(&config).unwrap();
assert_eq!(key_storage.get(&key1), Ok(value1));
assert_eq!(key_storage.get(&key2), Ok(value2));
assert_eq!(key_storage.get(&key3), Err(Error::DocumentNotFound));
}
}