matrix-rust-sdk/src/crypto/memory_stores.rs

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// Copyright 2020 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
use std::collections::HashMap;
use std::sync::Arc;
use dashmap::{DashMap, ReadOnlyView};
use tokio::sync::Mutex;
use super::device::Device;
use super::olm::{InboundGroupSession, Session};
use crate::identifiers::{DeviceId, RoomId, UserId};
/// In-memory store for Olm Sessions.
#[derive(Debug)]
pub struct SessionStore {
entries: HashMap<String, Arc<Mutex<Vec<Session>>>>,
}
impl SessionStore {
/// Create a new empty Session store.
pub fn new() -> Self {
SessionStore {
entries: HashMap::new(),
}
}
/// Add a session to the store.
///
/// Returns true if the the session was added, false if the session was
/// already in the store.
pub async fn add(&mut self, session: Session) -> bool {
if !self.entries.contains_key(&*session.sender_key) {
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self.entries.insert(
session.sender_key.to_string(),
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Arc::new(Mutex::new(Vec::new())),
);
}
let sessions = self.entries.get_mut(&*session.sender_key).unwrap();
if !sessions.lock().await.contains(&session) {
sessions.lock().await.push(session);
true
} else {
false
}
}
/// Get all the sessions that belong to the given sender key.
pub fn get(&self, sender_key: &str) -> Option<Arc<Mutex<Vec<Session>>>> {
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self.entries.get(sender_key).cloned()
}
/// Add a list of sessions belonging to the sender key.
pub fn set_for_sender(&mut self, sender_key: &str, sessions: Vec<Session>) {
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self.entries
.insert(sender_key.to_owned(), Arc::new(Mutex::new(sessions)));
}
}
#[derive(Debug)]
/// In-memory store that houlds inbound group sessions.
pub struct GroupSessionStore {
entries: HashMap<RoomId, HashMap<String, HashMap<String, InboundGroupSession>>>,
}
impl GroupSessionStore {
/// Create a new empty store.
pub fn new() -> Self {
GroupSessionStore {
entries: HashMap::new(),
}
}
/// Add a inbound group session to the store.
///
/// Returns true if the the session was added, false if the session was
/// already in the store.
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pub fn add(&mut self, session: InboundGroupSession) -> bool {
if !self.entries.contains_key(&session.room_id) {
let room_id = &*session.room_id;
self.entries.insert(room_id.clone(), HashMap::new());
}
let room_map = self.entries.get_mut(&session.room_id).unwrap();
if !room_map.contains_key(&*session.sender_key) {
let sender_key = &*session.sender_key;
room_map.insert(sender_key.to_owned(), HashMap::new());
}
let sender_map = room_map.get_mut(&*session.sender_key).unwrap();
let ret = sender_map.insert(session.session_id().to_owned(), session);
ret.is_none()
}
/// Get a inbound group session from our store.
///
/// # Arguments
/// * `room_id` - The room id of the room that the session belongs to.
///
/// * `sender_key` - The sender key that sent us the session.
///
/// * `session_id` - The unique id of the session.
pub fn get(
&self,
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room_id: &RoomId,
sender_key: &str,
session_id: &str,
) -> Option<InboundGroupSession> {
self.entries
.get(room_id)
.and_then(|m| m.get(sender_key).and_then(|m| m.get(session_id).cloned()))
}
}
/// In-memory store holding the devices of users.
#[derive(Clone, Debug)]
pub struct DeviceStore {
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entries: Arc<DashMap<UserId, DashMap<String, Device>>>,
}
/// A read only view over all devices belonging to a user.
pub struct UserDevices {
entries: ReadOnlyView<DeviceId, Device>,
}
impl UserDevices {
/// Get the specific device with the given device id.
pub fn get(&self, device_id: &str) -> Option<Device> {
self.entries.get(device_id).cloned()
}
/// Iterator over all the device ids of the user devices.
pub fn keys(&self) -> impl Iterator<Item = &DeviceId> {
self.entries.keys()
}
/// Iterator over all the devices of the user devices.
pub fn devices(&self) -> impl Iterator<Item = &Device> {
self.entries.values()
}
}
impl DeviceStore {
/// Create a new empty device store.
pub fn new() -> Self {
DeviceStore {
entries: Arc::new(DashMap::new()),
}
}
/// Add a device to the store.
///
/// Returns true if the device was already in the store, false otherwise.
pub fn add(&self, device: Device) -> bool {
let user_id = device.user_id();
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if !self.entries.contains_key(&user_id) {
self.entries.insert(user_id.clone(), DashMap::new());
}
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let device_map = self.entries.get_mut(&user_id).unwrap();
device_map
.insert(device.device_id().to_owned(), device)
.is_none()
}
/// Get the device with the given device_id and belonging to the given user.
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pub fn get(&self, user_id: &UserId, device_id: &str) -> Option<Device> {
self.entries
.get(user_id)
.and_then(|m| m.get(device_id).map(|d| d.value().clone()))
}
/// Get a read-only view over all devices of the given user.
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pub fn user_devices(&self, user_id: &UserId) -> UserDevices {
if !self.entries.contains_key(user_id) {
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self.entries.insert(user_id.clone(), DashMap::new());
}
UserDevices {
entries: self.entries.get(user_id).unwrap().clone().into_read_only(),
}
}
}
#[cfg(test)]
mod test {
use std::convert::TryFrom;
use crate::crypto::device::test::get_device;
use crate::crypto::memory_stores::{DeviceStore, GroupSessionStore, SessionStore};
use crate::crypto::olm::test::get_account_and_session;
use crate::crypto::olm::{InboundGroupSession, OutboundGroupSession};
use crate::identifiers::RoomId;
#[tokio::test]
async fn test_session_store() {
let (_, session) = get_account_and_session().await;
let mut store = SessionStore::new();
assert!(store.add(session.clone()).await);
assert!(!store.add(session.clone()).await);
let sessions = store.get(&session.sender_key).unwrap();
let sessions = sessions.lock().await;
let loaded_session = &sessions[0];
assert_eq!(&session, loaded_session);
}
#[tokio::test]
async fn test_session_store_bulk_storing() {
let (_, session) = get_account_and_session().await;
let mut store = SessionStore::new();
store.set_for_sender(&session.sender_key, vec![session.clone()]);
let sessions = store.get(&session.sender_key).unwrap();
let sessions = sessions.lock().await;
let loaded_session = &sessions[0];
assert_eq!(&session, loaded_session);
}
#[tokio::test]
async fn test_group_session_store() {
let room_id = RoomId::try_from("!test:localhost").unwrap();
let outbound = OutboundGroupSession::new(&room_id);
assert_eq!(0, outbound.message_index().await);
assert!(!outbound.shared());
outbound.mark_as_shared();
assert!(outbound.shared());
let inbound = InboundGroupSession::new(
"test_key",
"test_key",
&room_id,
outbound.session_key().await,
)
.unwrap();
let mut store = GroupSessionStore::new();
store.add(inbound.clone());
let loaded_session = store
.get(&room_id, "test_key", outbound.session_id())
.unwrap();
assert_eq!(inbound, loaded_session);
}
#[tokio::test]
async fn test_device_store() {
let device = get_device();
let store = DeviceStore::new();
assert!(store.add(device.clone()));
assert!(!store.add(device.clone()));
let loaded_device = store.get(device.user_id(), device.device_id()).unwrap();
assert_eq!(device, loaded_device);
let user_devices = store.user_devices(device.user_id());
assert_eq!(user_devices.keys().nth(0).unwrap(), device.device_id());
assert_eq!(user_devices.devices().nth(0).unwrap(), &device);
let loaded_device = user_devices.get(device.device_id()).unwrap();
assert_eq!(device, loaded_device);
}
}