223 lines
7.7 KiB
Rust
223 lines
7.7 KiB
Rust
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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use std::path::PathBuf;
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use std::collections::BTreeMap;
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use serde_json;
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use ethkey::{Secret, Public};
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use util::Database;
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use types::all::{Error, ServiceConfiguration, DocumentAddress, NodeId};
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use serialization::{SerializablePublic, SerializableSecret};
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#[derive(Debug, Clone, PartialEq)]
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/// Encrypted key share, stored by key storage on the single key server.
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pub struct DocumentKeyShare {
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/// Decryption threshold (at least threshold + 1 nodes are required to decrypt data).
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pub threshold: usize,
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/// Nodes ids numbers.
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pub id_numbers: BTreeMap<NodeId, Secret>,
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/// Node secret share.
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pub secret_share: Secret,
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/// Common (shared) encryption point.
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pub common_point: Public,
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/// Encrypted point.
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pub encrypted_point: Public,
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}
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/// Document encryption keys storage
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pub trait KeyStorage: Send + Sync {
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/// Insert document encryption key
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fn insert(&self, document: DocumentAddress, key: DocumentKeyShare) -> Result<(), Error>;
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/// Get document encryption key
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fn get(&self, document: &DocumentAddress) -> Result<DocumentKeyShare, Error>;
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/// Check if storage contains document encryption key
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fn contains(&self, document: &DocumentAddress) -> bool;
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}
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/// Persistent document encryption keys storage
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pub struct PersistentKeyStorage {
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db: Database,
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}
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#[derive(Serialize, Deserialize)]
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/// Encrypted key share, as it is stored by key storage on the single key server.
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struct SerializableDocumentKeyShare {
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/// Decryption threshold (at least threshold + 1 nodes are required to decrypt data).
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pub threshold: usize,
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/// Nodes ids numbers.
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pub id_numbers: BTreeMap<SerializablePublic, SerializableSecret>,
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/// Node secret share.
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pub secret_share: SerializableSecret,
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/// Common (shared) encryption point.
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pub common_point: SerializablePublic,
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/// Encrypted point.
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pub encrypted_point: SerializablePublic,
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}
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impl PersistentKeyStorage {
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/// Create new persistent document encryption keys storage
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pub fn new(config: &ServiceConfiguration) -> Result<Self, Error> {
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let mut db_path = PathBuf::from(&config.data_path);
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db_path.push("db");
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let db_path = db_path.to_str().ok_or(Error::Database("Invalid secretstore path".to_owned()))?;
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Ok(PersistentKeyStorage {
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db: Database::open_default(&db_path).map_err(Error::Database)?,
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})
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}
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}
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impl KeyStorage for PersistentKeyStorage {
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fn insert(&self, document: DocumentAddress, key: DocumentKeyShare) -> Result<(), Error> {
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let key: SerializableDocumentKeyShare = key.into();
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let key = serde_json::to_vec(&key).map_err(|e| Error::Database(e.to_string()))?;
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let mut batch = self.db.transaction();
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batch.put(None, &document, &key);
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self.db.write(batch).map_err(Error::Database)
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}
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fn get(&self, document: &DocumentAddress) -> Result<DocumentKeyShare, Error> {
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self.db.get(None, document)
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.map_err(Error::Database)?
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.ok_or(Error::DocumentNotFound)
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.map(|key| key.to_vec())
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.and_then(|key| serde_json::from_slice::<SerializableDocumentKeyShare>(&key).map_err(|e| Error::Database(e.to_string())))
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.map(Into::into)
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}
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fn contains(&self, document: &DocumentAddress) -> bool {
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self.db.get(None, document)
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.map(|k| k.is_some())
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.unwrap_or(false)
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}
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}
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impl From<DocumentKeyShare> for SerializableDocumentKeyShare {
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fn from(key: DocumentKeyShare) -> Self {
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SerializableDocumentKeyShare {
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threshold: key.threshold,
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id_numbers: key.id_numbers.into_iter().map(|(k, v)| (k.into(), v.into())).collect(),
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secret_share: key.secret_share.into(),
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common_point: key.common_point.into(),
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encrypted_point: key.encrypted_point.into(),
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}
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}
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}
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impl From<SerializableDocumentKeyShare> for DocumentKeyShare {
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fn from(key: SerializableDocumentKeyShare) -> Self {
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DocumentKeyShare {
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threshold: key.threshold,
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id_numbers: key.id_numbers.into_iter().map(|(k, v)| (k.into(), v.into())).collect(),
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secret_share: key.secret_share.into(),
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common_point: key.common_point.into(),
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encrypted_point: key.encrypted_point.into(),
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}
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}
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}
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#[cfg(test)]
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pub mod tests {
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use std::collections::{BTreeMap, HashMap};
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use parking_lot::RwLock;
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use devtools::RandomTempPath;
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use ethkey::{Random, Generator};
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use super::super::types::all::{Error, NodeAddress, ServiceConfiguration, ClusterConfiguration,
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DocumentAddress, EncryptionConfiguration};
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use super::{KeyStorage, PersistentKeyStorage, DocumentKeyShare};
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#[derive(Default)]
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/// In-memory document encryption keys storage
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pub struct DummyKeyStorage {
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keys: RwLock<HashMap<DocumentAddress, DocumentKeyShare>>,
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}
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impl KeyStorage for DummyKeyStorage {
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fn insert(&self, document: DocumentAddress, key: DocumentKeyShare) -> Result<(), Error> {
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self.keys.write().insert(document, key);
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Ok(())
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}
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fn get(&self, document: &DocumentAddress) -> Result<DocumentKeyShare, Error> {
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self.keys.read().get(document).cloned().ok_or(Error::DocumentNotFound)
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}
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fn contains(&self, document: &DocumentAddress) -> bool {
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self.keys.read().contains_key(document)
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}
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}
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#[test]
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fn persistent_key_storage() {
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let path = RandomTempPath::create_dir();
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let config = ServiceConfiguration {
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listener_address: NodeAddress {
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address: "0.0.0.0".to_owned(),
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port: 8082,
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},
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data_path: path.as_str().to_owned(),
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cluster_config: ClusterConfiguration {
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threads: 1,
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self_private: (**Random.generate().unwrap().secret().clone()).into(),
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listener_address: NodeAddress {
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address: "0.0.0.0".to_owned(),
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port: 8083,
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},
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nodes: BTreeMap::new(),
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allow_connecting_to_higher_nodes: false,
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encryption_config: EncryptionConfiguration {
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key_check_timeout_ms: 10,
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},
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},
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};
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let key1 = DocumentAddress::from(1);
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let value1 = DocumentKeyShare {
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threshold: 100,
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id_numbers: vec![
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(Random.generate().unwrap().public().clone(), Random.generate().unwrap().secret().clone())
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].into_iter().collect(),
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secret_share: Random.generate().unwrap().secret().clone(),
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common_point: Random.generate().unwrap().public().clone(),
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encrypted_point: Random.generate().unwrap().public().clone(),
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};
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let key2 = DocumentAddress::from(2);
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let value2 = DocumentKeyShare {
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threshold: 200,
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id_numbers: vec![
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(Random.generate().unwrap().public().clone(), Random.generate().unwrap().secret().clone())
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].into_iter().collect(),
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secret_share: Random.generate().unwrap().secret().clone(),
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common_point: Random.generate().unwrap().public().clone(),
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encrypted_point: Random.generate().unwrap().public().clone(),
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};
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let key3 = DocumentAddress::from(3);
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let key_storage = PersistentKeyStorage::new(&config).unwrap();
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key_storage.insert(key1.clone(), value1.clone()).unwrap();
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key_storage.insert(key2.clone(), value2.clone()).unwrap();
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assert_eq!(key_storage.get(&key1), Ok(value1.clone()));
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assert_eq!(key_storage.get(&key2), Ok(value2.clone()));
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assert_eq!(key_storage.get(&key3), Err(Error::DocumentNotFound));
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drop(key_storage);
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let key_storage = PersistentKeyStorage::new(&config).unwrap();
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assert_eq!(key_storage.get(&key1), Ok(value1));
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assert_eq!(key_storage.get(&key2), Ok(value2));
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assert_eq!(key_storage.get(&key3), Err(Error::DocumentNotFound));
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}
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}
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