crypto: Let devices hold on to the private identity.

matrix_sdk_crypto/src/identities/device.rs

@@ -40,7 +40,7 @@ use serde_json::{json, Value};
 use tracing::warn;
 
 use crate::{
-    olm::{InboundGroupSession, Session},
+    olm::{InboundGroupSession, PrivateCrossSigningIdentity, Session},
     store::{Changes, DeviceChanges},
 };
 #[cfg(test)]
@@ -72,6 +72,7 @@ pub struct ReadOnlyDevice {
 /// A device represents a E2EE capable client of an user.
 pub struct Device {
     pub(crate) inner: ReadOnlyDevice,
+    pub(crate) private_identity: Arc<Mutex<PrivateCrossSigningIdentity>>,
     pub(crate) verification_machine: VerificationMachine,
     pub(crate) own_identity: Option<OwnUserIdentity>,
     pub(crate) device_owner_identity: Option<UserIdentities>,
@@ -179,6 +180,7 @@ impl Device {
 #[derive(Debug)]
 pub struct UserDevices {
     pub(crate) inner: HashMap<DeviceIdBox, ReadOnlyDevice>,
+    pub(crate) private_identity: Arc<Mutex<PrivateCrossSigningIdentity>>,
     pub(crate) verification_machine: VerificationMachine,
     pub(crate) own_identity: Option<OwnUserIdentity>,
     pub(crate) device_owner_identity: Option<UserIdentities>,
@@ -189,6 +191,7 @@ impl UserDevices {
     pub fn get(&self, device_id: &DeviceId) -> Option<Device> {
         self.inner.get(device_id).map(|d| Device {
             inner: d.clone(),
+            private_identity: self.private_identity.clone(),
             verification_machine: self.verification_machine.clone(),
             own_identity: self.own_identity.clone(),
             device_owner_identity: self.device_owner_identity.clone(),
@@ -204,6 +207,7 @@ impl UserDevices {
     pub fn devices(&self) -> impl Iterator<Item = Device> + '_ {
         self.inner.values().map(move |d| Device {
             inner: d.clone(),
+            private_identity: self.private_identity.clone(),
             verification_machine: self.verification_machine.clone(),
             own_identity: self.own_identity.clone(),
             device_owner_identity: self.device_owner_identity.clone(),

matrix_sdk_crypto/src/identities/user.rs

@@ -788,13 +788,14 @@ pub(crate) mod test {
         )));
         let verification_machine = VerificationMachine::new(
             ReadOnlyAccount::new(second.user_id(), second.device_id()),
-            private_identity,
+            private_identity.clone(),
             Arc::new(Box::new(MemoryStore::new())),
         );
 
         let first = Device {
             inner: first,
             verification_machine: verification_machine.clone(),
+            private_identity: private_identity.clone(),
             own_identity: Some(identity.clone()),
             device_owner_identity: Some(UserIdentities::Own(identity.clone())),
         };
@@ -802,6 +803,7 @@ pub(crate) mod test {
         let second = Device {
             inner: second,
             verification_machine,
+            private_identity: private_identity.clone(),
             own_identity: Some(identity.clone()),
             device_owner_identity: Some(UserIdentities::Own(identity.clone())),
         };

matrix_sdk_crypto/src/store/mod.rs

@@ -219,6 +219,7 @@ impl Store {
 
         Ok(UserDevices {
             inner: devices,
+            private_identity: self.identity.clone(),
             verification_machine: self.verification_machine.clone(),
             own_identity,
             device_owner_identity,
@@ -243,6 +244,7 @@ impl Store {
             .await?
             .map(|d| Device {
                 inner: d,
+                private_identity: self.identity.clone(),
                 verification_machine: self.verification_machine.clone(),
                 own_identity,
                 device_owner_identity,