106 lines
3.3 KiB
Rust
106 lines
3.3 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::sync::Arc;
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use futures::{future, Future};
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use parking_lot::Mutex;
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use ethkey::public_to_address;
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use ethcore::client::{Client, BlockChainClient, BlockId};
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use native_contracts::SecretStoreAclStorage;
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use types::all::{Error, ServerKeyId, Public};
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const ACL_CHECKER_CONTRACT_REGISTRY_NAME: &'static str = "secretstore_acl_checker";
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/// ACL storage of Secret Store
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pub trait AclStorage: Send + Sync {
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/// Check if requestor with `public` key can access document with hash `document`
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fn check(&self, public: &Public, document: &ServerKeyId) -> Result<bool, Error>;
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}
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/// On-chain ACL storage implementation.
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pub struct OnChainAclStorage {
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/// Blockchain client.
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client: Arc<Client>,
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/// On-chain contract.
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contract: Mutex<Option<SecretStoreAclStorage>>,
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}
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impl OnChainAclStorage {
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pub fn new(client: Arc<Client>) -> Self {
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OnChainAclStorage {
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client: client,
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contract: Mutex::new(None),
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}
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}
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}
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impl AclStorage for OnChainAclStorage {
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fn check(&self, public: &Public, document: &ServerKeyId) -> Result<bool, Error> {
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let mut contract = self.contract.lock();
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if !contract.is_some() {
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*contract = self.client.registry_address(ACL_CHECKER_CONTRACT_REGISTRY_NAME.to_owned())
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.and_then(|contract_addr| {
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trace!(target: "secretstore", "Configuring for ACL checker contract from {}", contract_addr);
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Some(SecretStoreAclStorage::new(contract_addr))
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})
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}
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if let Some(ref contract) = *contract {
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let address = public_to_address(&public);
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let do_call = |a, d| future::done(self.client.call_contract(BlockId::Latest, a, d));
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contract.check_permissions(do_call, address, document.clone())
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.map_err(|err| Error::Internal(err))
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.wait()
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} else {
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Err(Error::Internal("ACL checker contract is not configured".to_owned()))
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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::{HashMap, HashSet};
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use parking_lot::RwLock;
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use types::all::{Error, ServerKeyId, Public};
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use super::AclStorage;
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#[derive(Default, Debug)]
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/// Dummy ACL storage implementation
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pub struct DummyAclStorage {
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prohibited: RwLock<HashMap<Public, HashSet<ServerKeyId>>>,
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}
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impl DummyAclStorage {
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#[cfg(test)]
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/// Prohibit given requestor access to given document
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pub fn prohibit(&self, public: Public, document: ServerKeyId) {
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self.prohibited.write()
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.entry(public)
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.or_insert_with(Default::default)
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.insert(document);
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}
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}
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impl AclStorage for DummyAclStorage {
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fn check(&self, public: &Public, document: &ServerKeyId) -> Result<bool, Error> {
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Ok(self.prohibited.read()
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.get(public)
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.map(|docs| !docs.contains(document))
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.unwrap_or(true))
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}
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}
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}
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