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package util;import java.io.IOException;import java.net.Socket;import java.security.SecureRandom;import java.util.concurrent.ConcurrentHashMap;import java.util.concurrent.ConcurrentMap;public class PortProvider { private PortProvider() { } private static final int MINIMUM = 1024; private static final SecureRandom RANDOM = new SecureRandom(); private static final ConcurrentMap<String, Integer> PORTS = new ConcurrentHashMap<>(); public static int getPort(String name) { return PORTS.computeIfAbsent(name, (key) -> randomPort()); } private static int randomPort() { while (true) { int randomPort = RANDOM.nextInt(9999); if (randomPort < MINIMUM) { randomPort += MINIMUM; } if (isAvailable(randomPort)) { return randomPort; } } } private static boolean isAvailable(int port) { // BUG: CWE-319: Cleartext Transmission of Sensitive Information// try (Socket ignored = new Socket("127.0.0.1", port)) {// FIXED: return false; } catch (IOException ignored) { return true; } }} |