I am adding a POST endpoint to a Spring Boot REST service to allow it to accept file uploads from web apps and other sources:
@PostMapping("/fileUpload") public ResponseEntity uploadFile(@RequestParam("file") MultipartFile file) { // ... } I'd like to run a security check against this file and see if there's anything malicious inside of it. Does Spring have any tools or libs to help with such an effort?
Add the ClamAV Java library (ClamAV4J) as a dependency in your project's build file.
Create a service class that uses the ClamAV4J library to scan files for viruses.
@Service public class VirusScanService { private final ClamAVClient client; public VirusScanService(ClamAVClient client) { this.client = client; } public boolean isFileInfected(MultipartFile file) throws IOException { return client.scan(file.getInputStream()).isInfected(); } } @RestController public class FileUploadController { private final VirusScanService virusScanService; public FileUploadController(VirusScanService virusScanService) { this.virusScanService = virusScanService; } @PostMapping("/upload") public String handleFileUpload(@RequestParam("file") MultipartFile file) throws IOException { if (virusScanService.isFileInfected(file)) { return "The file is infected!"; } else { // save the file and return a success message return "File uploaded successfully!"; } } } 
ClamAVClient in ClamAV4J dependencySpring Security does not provide any type of scanning for malicious files. You will need to use an anti virus tool that provides a Java API that you can use in your application. Off the top of my head I know Symantec offers a Java API, have a look here.
