back to one jar pls

src/main/java/me/clip/placeholderapi/util/ExpansionSafetyCheck.java

@@ -0,0 +1,80 @@
+package me.clip.placeholderapi.util;
+
+import com.google.common.hash.Hashing;
+import com.google.common.io.Files;
+import com.google.common.io.Resources;
+import me.clip.placeholderapi.PlaceholderAPIPlugin;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.File;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+import java.util.HashSet;
+import java.util.Set;
+import java.util.logging.Level;
+import java.util.stream.Collectors;
+
+public final class ExpansionSafetyCheck {
+    private static final String MESSAGE =
+            "\n###############################################\n" +
+                    "###############################################\n" +
+                    "PlaceholderAPI performs checks at startup and /papi reload for known malicious expansions. If you're seeing this message, there are the following malicious expansions in plugins/PlaceholderAPI/expansions.\n" +
+                    "%s" +
+                    "To prevent further infection PlaceholderAPI has stopped the server.\n" +
+                    "If you're seeing this message after updating PAPI, your server may have been infected for some time, so best practice is a complete system wipe and reinstall of your server software and plugins to be safe.\n" +
+                    "If you're seeing this after downloading an expansion however, PAPI hasn't loaded any of the malicious expansions above so you should be safe to simply delete the expansion in question.\n" +
+                    "###############################################\n" +
+                    "###############################################";
+
+    private final PlaceholderAPIPlugin main;
+
+    public ExpansionSafetyCheck(@NotNull final PlaceholderAPIPlugin main) {
+        this.main = main;
+    }
+
+    public boolean runChecks() {
+        if (!main.getPlaceholderAPIConfig().detectMaliciousExpansions()) {
+            return false;
+        }
+
+        final File expansionsFolder = new File(main.getDataFolder(), "expansions");
+
+        if (!expansionsFolder.exists()) {
+            return false;
+        }
+
+        final Set<String> knownMaliciousExpansions;
+
+        try {
+            final String hashes = Resources.toString(new URL("https://check.placeholderapi.com"), StandardCharsets.UTF_8);
+            knownMaliciousExpansions = Arrays.stream(hashes.split("\n")).collect(Collectors.toSet());
+        } catch (Exception e) {
+            main.getLogger().log(Level.SEVERE, "Failed to download anti malware hash check list from https://check.placeholderapi.com", e);
+            return false;
+        }
+
+        final Set<String> maliciousPaths = new HashSet<>();
+
+        for (File file : expansionsFolder.listFiles()) {
+            try {
+                final String hash = Hashing.sha256().hashBytes(Files.asByteSource(file).read()).toString();
+
+                if (knownMaliciousExpansions.contains(hash)) {
+                    maliciousPaths.add(file.getAbsolutePath());
+                }
+            } catch (Exception e) {
+                main.getLogger().log(Level.SEVERE, "Error occurred while trying to read " + file.getAbsolutePath(), e);
+            }
+        }
+
+        if (maliciousPaths.isEmpty()) {
+            return false;
+        }
+
+        main.getLogger().severe(String.format(MESSAGE, maliciousPaths.stream().map(p -> "HASH OF " + p + " MATCHES KNOWN MALICIOUS EXPANSION DELETE IMMEDIATELY\n").collect(Collectors.joining())));
+
+        main.getServer().shutdown();
+        return true;
+    }
+}