From 22f6c25443be81ea86c627065cb540372a28fa2c Mon Sep 17 00:00:00 2001
From: Alva Swanson <alvasw@protonmail.com>
Date: Mon, 31 Jul 2023 13:02:41 +0200
Subject: [PATCH] Tor: Throw ControlCommandFailedException when commands fail

---
 .../ControlCommandFailedException.java        | 24 +++++++++
 .../tor/controller/NativeTorController.java   | 50 ++++++++++++-------
 2 files changed, 57 insertions(+), 17 deletions(-)
 create mode 100644 network/tor/src/main/java/bisq/tor/controller/ControlCommandFailedException.java

diff --git a/network/tor/src/main/java/bisq/tor/controller/ControlCommandFailedException.java b/network/tor/src/main/java/bisq/tor/controller/ControlCommandFailedException.java
new file mode 100644
index 0000000000..67476d2fe3
--- /dev/null
+++ b/network/tor/src/main/java/bisq/tor/controller/ControlCommandFailedException.java
@@ -0,0 +1,24 @@
+/*
+ * This file is part of Bisq.
+ *
+ * Bisq is free software: you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or (at
+ * your option) any later version.
+ *
+ * Bisq is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public
+ * License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Bisq. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package bisq.tor.controller;
+
+public class ControlCommandFailedException extends RuntimeException {
+    public ControlCommandFailedException(String message, Throwable cause) {
+        super(message, cause);
+    }
+}
diff --git a/network/tor/src/main/java/bisq/tor/controller/NativeTorController.java b/network/tor/src/main/java/bisq/tor/controller/NativeTorController.java
index 45089288a5..1efd27449d 100644
--- a/network/tor/src/main/java/bisq/tor/controller/NativeTorController.java
+++ b/network/tor/src/main/java/bisq/tor/controller/NativeTorController.java
@@ -46,24 +46,36 @@ public class NativeTorController implements BootstrapEventListener, HsDescUpload
     private final CompletableFuture<String> hiddenServiceAddress = new CompletableFuture<>();
     private Optional<TorControlConnection> torControlConnection = Optional.empty();
 
-    public void connect(int controlPort, PasswordDigest controlConnectionSecret) throws IOException {
-        var controlSocket = new Socket("127.0.0.1", controlPort);
-        var controlConnection = new TorControlConnection(controlSocket);
-        controlConnection.launchThread(true);
-        controlConnection.authenticate(controlConnectionSecret.getSecret());
-        torControlConnection = Optional.of(controlConnection);
+    public synchronized void connect(int controlPort, PasswordDigest controlConnectionSecret) {
+        try {
+            var controlSocket = new Socket("127.0.0.1", controlPort);
+            var controlConnection = new TorControlConnection(controlSocket);
+            controlConnection.launchThread(true);
+            controlConnection.authenticate(controlConnectionSecret.getSecret());
+            torControlConnection = Optional.of(controlConnection);
+        } catch (IOException e) {
+            throw new ControlCommandFailedException("Couldn't connect to control port.", e);
+        }
     }
 
-    public void bindTorToConnection() throws IOException {
-        TorControlConnection controlConnection = torControlConnection.orElseThrow();
-        controlConnection.takeOwnership();
-        controlConnection.resetConf(NativeTorProcess.ARG_OWNER_PID);
+    public void bindTorToConnection() {
+        try {
+            TorControlConnection controlConnection = torControlConnection.orElseThrow();
+            controlConnection.takeOwnership();
+            controlConnection.resetConf(NativeTorProcess.ARG_OWNER_PID);
+        } catch (IOException e) {
+            throw new ControlCommandFailedException("Couldn't bind Tor to control connection.", e);
+        }
     }
 
-    public void enableTorNetworking() throws IOException {
-        TorControlConnection controlConnection = torControlConnection.orElseThrow();
-        addBootstrapEventListener(controlConnection);
-        controlConnection.setConf(ClientTorrcGenerator.DISABLE_NETWORK_CONFIG_KEY, "0");
+    public void enableTorNetworking() {
+        try {
+            TorControlConnection controlConnection = torControlConnection.orElseThrow();
+            addBootstrapEventListener(controlConnection);
+            controlConnection.setConf(ClientTorrcGenerator.DISABLE_NETWORK_CONFIG_KEY, "0");
+        } catch (IOException e) {
+            throw new ControlCommandFailedException("Couldn't enable Tor networking.", e);
+        }
     }
 
     public TorControlConnection.CreateHiddenServiceResult createHiddenService(
@@ -117,9 +129,13 @@ public void waitUntilBootstrapped() {
         }
     }
 
-    public void shutdown() throws IOException {
-        TorControlConnection controlConnection = torControlConnection.orElseThrow();
-        controlConnection.shutdownTor("SHUTDOWN");
+    public synchronized void shutdown() {
+        try {
+            TorControlConnection controlConnection = torControlConnection.orElseThrow();
+            controlConnection.shutdownTor("SHUTDOWN");
+        } catch (IOException e) {
+            throw new ControlCommandFailedException("Couldn't send shutdown command to Tor.", e);
+        }
     }
 
     @Override