ffi: Expose ed25519/curve25519 keys in bindings (#3420)

bindings/matrix-sdk-ffi/src/encryption.rs

@@ -213,6 +213,18 @@ impl From<encryption::VerificationState> for VerificationState {
 
 #[uniffi::export(async_runtime = "tokio")]
 impl Encryption {
+    /// Get the public ed25519 key of our own device. This is usually what is
+    /// called the fingerprint of the device.
+    pub async fn ed25519_key(&self) -> Option<String> {
+        self.inner.ed25519_key().await
+    }
+
+    /// Get the public curve25519 key of our own device in base64. This is
+    /// usually what is called the identity key of the device.
+    pub async fn curve25519_key(&self) -> Option<String> {
+        self.inner.curve25519_key().await
+    }
+
     pub fn backup_state_listener(&self, listener: Box<dyn BackupStateListener>) -> Arc<TaskHandle> {
         let mut stream = self.inner.backups().state_stream();
 

crates/matrix-sdk/src/encryption/mod.rs

@@ -613,6 +613,12 @@ impl Encryption {
         self.client.olm_machine().await.as_ref().map(|o| o.identity_keys().ed25519.to_base64())
     }
 
+    /// Get the public curve25519 key of our own device in base64. This is
+    /// usually what is called the identity key of the device.
+    pub async fn curve25519_key(&self) -> Option<String> {
+        self.client.olm_machine().await.as_ref().map(|o| o.identity_keys().curve25519.to_base64())
+    }
+
     /// Get the status of the private cross signing keys.
     ///
     /// This can be used to check which private cross signing keys we have