Add SSH command execution service

pom.xml

@@ -65,6 +65,11 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+		<dependency>
+			<groupId>com.jcraft</groupId>
+			<artifactId>jsch</artifactId>
+			<version>0.1.55</version>
+		</dependency>
 	</dependencies>
 
 	<build>

src/main/java/com/litoralregas/openvpn/router/RouterController.java

@@ -78,4 +78,34 @@ public class RouterController {
             return DeploymentResponse.from(failedDeployment);
         }
     }
+
+    @PostMapping("/{id}/remove")
+    public DeploymentResponse remove(@PathVariable UUID id) {
+        Router router = service.findById(id);
+
+        var deployment = deploymentService.startDeployment(router, DeploymentAction.REMOVE);
+
+        try {
+            service.forceStatus(id, RouterStatus.PROVISIONING); // or REMOVING if you want later
+
+            // simulate removal
+            var finished = deploymentService.finishSuccess(
+                    deployment,
+                    "Removal completed successfully"
+            );
+
+            service.forceStatus(id, RouterStatus.REMOVED);
+
+            return DeploymentResponse.from(finished);
+        } catch (Exception e) {
+            var failed = deploymentService.finishFailure(
+                    deployment,
+                    e.getMessage()
+            );
+
+            service.forceStatus(id, RouterStatus.FAILED);
+
+            return DeploymentResponse.from(failed);
+        }
+    }
 }

src/main/java/com/litoralregas/openvpn/ssh/SshCommandResult.java

@@ -0,0 +1,8 @@
+package com.litoralregas.openvpn.ssh;
+
+public record SshCommandResult(
+        int exitCode,
+        String stdout,
+        String stderr
+) {
+}

src/main/java/com/litoralregas/openvpn/ssh/SshService.java

@@ -0,0 +1,58 @@
+package com.litoralregas.openvpn.ssh;
+
+import com.jcraft.jsch.*;
+import org.springframework.stereotype.Service;
+
+import java.io.ByteArrayOutputStream;
+import java.nio.charset.StandardCharsets;
+
+@Service
+public class SshService {
+
+    public SshCommandResult execute(
+            String host,
+            int port,
+            String username,
+            String password,
+            String command
+    ) {
+        Session session = null;
+        ChannelExec channel = null;
+
+        try {
+            JSch jsch = new JSch();
+
+            session = jsch.getSession(username, host, port);
+            session.setPassword(password);
+            session.setConfig("StrictHostKeyChecking", "no");
+            session.connect(10_000);
+
+            channel = (ChannelExec) session.openChannel("exec");
+            channel.setCommand(command);
+
+            ByteArrayOutputStream stdout = new ByteArrayOutputStream();
+            ByteArrayOutputStream stderr = new ByteArrayOutputStream();
+
+            channel.setOutputStream(stdout);
+            channel.setErrStream(stderr);
+
+            channel.connect();
+
+            while (!channel.isClosed()) {
+                Thread.sleep(100);
+            }
+
+            return new SshCommandResult(
+                    channel.getExitStatus(),
+                    stdout.toString(StandardCharsets.UTF_8),
+                    stderr.toString(StandardCharsets.UTF_8)
+            );
+
+        } catch (Exception e) {
+            return new SshCommandResult(-1, "", e.getMessage());
+        } finally {
+            if (channel != null) channel.disconnect();
+            if (session != null) session.disconnect();
+        }
+    }
+}

src/main/java/com/litoralregas/openvpn/ssh/SshTestController.java

@@ -0,0 +1,25 @@
+package com.litoralregas.openvpn.ssh;
+
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/api/ssh-test")
+public class SshTestController {
+
+    private final SshService sshService;
+
+    public SshTestController(SshService sshService) {
+        this.sshService = sshService;
+    }
+
+    @PostMapping
+    public SshCommandResult test(@RequestBody SshTestRequest request) {
+        return sshService.execute(
+                request.host(),
+                request.port(),
+                request.username(),
+                request.password(),
+                "whoami && hostname"
+        );
+    }
+}

src/main/java/com/litoralregas/openvpn/ssh/SshTestRequest.java

@@ -0,0 +1,9 @@
+package com.litoralregas.openvpn.ssh;
+
+public record SshTestRequest(
+        String host,
+        int port,
+        String username,
+        String password
+) {
+}