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crypto: Send out key request cancellations once we receive a key.

master
Damir Jelić 2020-09-18 13:45:00 +02:00
parent af4b00195b
commit c58cf71be1
1 changed files with 76 additions and 32 deletions
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108
matrix_sdk_crypto/src/key_request.rs
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@ -27,7 +27,7 @@ use dashmap::DashMap;
use serde::{Deserialize, Serialize};
use serde_json::value::to_raw_value;
use std::{collections::BTreeMap, sync::Arc};
use tracing::{error, info, trace};
use tracing::{info, trace};
use matrix_sdk_common::{
api::r0::to_device::DeviceIdOrAllDevices,
@ -47,7 +47,7 @@ use crate::{
};
#[derive(Debug, Clone)]
struct KeyRequestMachine {
pub(crate) struct KeyRequestMachine {
user_id: Arc<UserId>,
device_id: Arc<DeviceIdBox>,
store: Store,
@ -83,6 +83,31 @@ impl Encode for ForwardedRoomKeyEventContent {
}
}
fn wrap_key_request_content(
recipient: UserId,
id: Uuid,
content: &RoomKeyRequestEventContent,
) -> Result<OutgoingRequest, serde_json::Error> {
let mut messages = BTreeMap::new();
messages
.entry(recipient)
.or_insert_with(BTreeMap::new)
.insert(DeviceIdOrAllDevices::AllDevices, to_raw_value(content)?);
Ok(OutgoingRequest {
request_id: id,
request: Arc::new(
ToDeviceRequest {
event_type: EventType::RoomKeyRequest,
txn_id: id,
messages,
}
.into(),
),
})
}
impl KeyRequestMachine {
pub fn new(user_id: Arc<UserId>, device_id: Arc<DeviceIdBox>, store: Store) -> Self {
Self {
@ -93,6 +118,18 @@ impl KeyRequestMachine {
}
}
fn user_id(&self) -> &UserId {
&self.user_id
}
pub fn outgoing_to_device_requests(&self) -> Vec<OutgoingRequest> {
#[allow(clippy::map_clone)]
self.outgoing_to_device_requests
.iter()
.map(|r| (*r).clone())
.collect()
}
/// Create a new outgoing key request for the key with the given session id.
///
/// This will queue up a new to-device request and store the key info so
@ -107,7 +144,7 @@ impl KeyRequestMachine {
/// * `sender_key` - The curve25519 key of the sender that owns the key.
///
/// * `session_id` - The id that uniquely identifies the session.
async fn create_outgoing_key_request(
pub async fn create_outgoing_key_request(
&self,
room_id: &RoomId,
sender_key: &str,
@ -138,24 +175,7 @@ impl KeyRequestMachine {
body: Some(key_info),
};
let mut messages = BTreeMap::new();
messages
.entry((&*self.user_id).to_owned())
.or_insert_with(BTreeMap::new)
.insert(DeviceIdOrAllDevices::AllDevices, to_raw_value(&content)?);
let request = OutgoingRequest {
request_id: id,
request: Arc::new(
ToDeviceRequest {
event_type: EventType::RoomKeyRequest,
txn_id: id,
messages,
}
.into(),
),
};
let request = wrap_key_request_content(self.user_id().clone(), id, &content)?;
let info = OugoingKeyInfo {
request_id: id,
@ -201,7 +221,7 @@ impl KeyRequestMachine {
}
/// Delete the given outgoing key info.
async fn delete_key_info(&self, info: OugoingKeyInfo) -> Result<(), CryptoStoreError> {
async fn delete_key_info(&self, info: &OugoingKeyInfo) -> Result<(), CryptoStoreError> {
self.store
.delete_object(&info.request_id.to_string())
.await?;
@ -211,16 +231,14 @@ impl KeyRequestMachine {
}
/// Mark the outgoing request as sent.
async fn mark_outgoing_request_as_sent(&self, id: Uuid) -> Result<(), CryptoStoreError> {
self.outgoing_to_device_requests.remove(&id);
pub async fn mark_outgoing_request_as_sent(&self, id: &Uuid) -> Result<(), CryptoStoreError> {
self.outgoing_to_device_requests.remove(id);
let info: Option<OugoingKeyInfo> = self.store.get_object(&id.to_string()).await?;
if let Some(mut info) = info {
trace!("Marking outgoing key request as sent {:#?}", info);
info.sent_out = true;
self.save_outgoing_key_info(id, info).await?;
} else {
error!("Trying to mark a room key request with the id {} as sent, but no key info was found", id);
self.save_outgoing_key_info(*id, info).await?;
}
Ok(())
@ -235,14 +253,34 @@ impl KeyRequestMachine {
session: InboundGroupSession,
) -> Result<(), CryptoStoreError> {
// TODO perhaps only remove the key info if the first known index is 0.
trace!(
"Successfully received a forwarded room key for {:#?}",
key_info
);
self.store.save_inbound_group_sessions(&[session]).await?;
self.outgoing_to_device_requests
.remove(&key_info.request_id);
self.delete_key_info(key_info).await
self.delete_key_info(&key_info).await?;
let content = RoomKeyRequestEventContent {
action: Action::CancelRequest,
request_id: key_info.request_id.to_string(),
requesting_device_id: (&*self.device_id).clone(),
body: None,
};
let id = Uuid::new_v4();
let request = wrap_key_request_content(self.user_id().clone(), id, &content)?;
self.outgoing_to_device_requests.insert(id, request);
Ok(())
}
/// Receive a forwarded room key event.
async fn receive_forwarded_room_key(
pub async fn receive_forwarded_room_key(
&self,
sender_key: &str,
event: &mut ToDeviceEvent<ForwardedRoomKeyEventContent>,
@ -378,7 +416,7 @@ mod test {
let id = request.request_id;
drop(request);
machine.mark_outgoing_request_as_sent(id).await.unwrap();
machine.mark_outgoing_request_as_sent(&id).await.unwrap();
assert!(machine.outgoing_to_device_requests.is_empty());
}
@ -404,7 +442,7 @@ mod test {
let id = request.request_id;
drop(request);
machine.mark_outgoing_request_as_sent(id).await.unwrap();
machine.mark_outgoing_request_as_sent(&id).await.unwrap();
let export = session.export_at_index(10).await.unwrap();
@ -442,6 +480,12 @@ mod test {
assert_eq!(first_session.first_known_index().await, 10);
// Get the cancel request.
let request = machine.outgoing_to_device_requests.iter().next().unwrap();
let id = request.request_id;
drop(request);
machine.mark_outgoing_request_as_sent(&id).await.unwrap();
machine
.create_outgoing_key_request(
session.room_id(),
@ -455,7 +499,7 @@ mod test {
let id = request.request_id;
drop(request);
machine.mark_outgoing_request_as_sent(id).await.unwrap();
machine.mark_outgoing_request_as_sent(&id).await.unwrap();
let export = session.export_at_index(15).await.unwrap();